GREAT LAKES DREDGE & DOCK CO
S-4, 1998-09-29
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<PAGE>
 
  AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 29, 1998
 
                                                      REGISTRATION NO. 333-
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                               ---------------
 
                                   FORM S-4
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
 
                               ---------------
 
                     GREAT LAKES DREDGE & DOCK CORPORATION
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
        DELAWARE                     1600                     13-3634726
    (STATE OR OTHER          (PRIMARY STANDARD INDUSTRIAL   (I.R.S. EMPLOYER
      JURISDICTION            CLASSIFICATION CODE NUMBER)  IDENTIFICATION NO.)
  (OF INCORPORATION OR                                      
     ORGANIZATION)
 
                               ---------------
 
                   SEE TABLE OF ADDITIONAL REGISTRANTS BELOW
 
                               ---------------
 
                                2122 YORK ROAD
                           OAK BROOK, ILLINOIS 60521
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANTS' PRINCIPAL EXECUTIVE OFFICES)
 
                             MR. DOUGLAS B. MACKIE
                      PRESIDENT & CHIEF EXECUTIVE OFFICER
                     GREAT LAKES DREDGE & DOCK CORPORATION
                                2122 YORK ROAD
                           OAK BROOK, ILLINOIS 60521
                                (630) 574-3000
(NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT OR SERVICE)
 
                               ---------------
 
                                WITH COPIES TO:
 
                           G. DANIEL O'DONNELL, ESQ.
                            DECHERT PRICE & RHOADS
                           4000 BELL ATLANTIC TOWER
                               1717 ARCH STREET
                       PHILADELPHIA, PENNSYLVANIA 19103
                                (215) 994-4000
 
                               ---------------
 
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after the effective date of this Registration Statement.
 
  If any of the securities being registered on this Form are being offered in
connection with the formation of a holding company and there is compliance
with General Instruction G, check the following box. [_]
 
                               ---------------
 
                        CALCULATION OF REGISTRATION FEE
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                         PROPOSED
                                           PROPOSED      MAXIMUM
 TITLE OF EACH CLASS OF       AMOUNT       MAXIMUM      AGGREGATE    AMOUNT OF
    SECURITIES TO BE          TO BE     OFFERING PRICE   OFFERING   REGISTRATION
       REGISTERED           REGISTERED   PER UNIT(1)     PRICE(1)       FEE
- --------------------------------------------------------------------------------
<S>                        <C>          <C>            <C>          <C>
Series B 11 1/4% Senior
 Subordinated Notes due
 2008...................   $115,000,000      100%      $115,000,000   $33,925
- --------------------------------------------------------------------------------
Guarantee of Series B 11
 1/4% Senior Subordinated
 Notes due 2008 by each
 of the Registrants other
 than Great Lakes Dredge
 & Dock Corporation (see
 table below)...........   $115,000,000       --            --        None(2)
</TABLE>
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
(1) Estimated pursuant to Rule 457(f) solely for purposes of calculating the
    registration fee.
(2) Pursuant to Rule 457(n), no separate fee is payable for the guarantees.
 
                               ---------------
 
  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS
REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH
SECTION 8(A) OF THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID
SECTION 8(A), MAY DETERMINE.
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                        TABLE OF ADDITIONAL REGISTRANTS
 
<TABLE>
<CAPTION>
                                                       STATE OR OTHER  PRIMARY STANDARD
EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER;  JURISDICTION OF    INDUSTRIAL    I.R.S. EMPLOYER
 ADDRESS, INCLUDING ZIP CODE; AND TELEPHONE NUMBER,    INCORPORATION    CLASSIFICATION  IDENTIFICATION
 INCLUDING AREA CODE, OF PRINCIPAL EXECUTIVE OFFICES   OR ORGANIZATION   CODE NUMBER        NUMBER
- -----------------------------------------------------  --------------- ---------------- ---------------
<S>                                                    <C>             <C>              <C>
Great Lakes Dredge & Dock
 Company                                                 New Jersey          1600         36-1163930
2122 York Road
Oak Brook, IL 60521
(630) 574-3000
Great Lakes International, Inc.                           Delaware           1600         36-3015839
2122 York Road
Oak Brook, IL 60521
(630) 574-3000
Dawson Dredging Company                                   Delaware           1600         36-3503893
2122 York Road
Oak Brook, IL 60521
(630) 574-3000
Gates Construction Corp.                                 New Jersey          1600         22-1539854
2122 York Road
Oak Brook, IL 60521
(630) 574-3000
Fifty-Three Dredging
 Corporation                                             New Jersey          1600         36-3177787
2122 York Road
Oak Brook, IL 60521
(630) 574-3000
</TABLE>
<PAGE>
 
                             AVAILABLE INFORMATION
 
  The Company has filed with the Commission a Registration Statement on Form
S-4 (the "Registration Statement," which term shall encompass all amendments,
exhibits, annexes and schedules thereto) pursuant to the Securities Act, and
the rules and regulations promulgated thereunder, covering the Exchange Notes
being offered hereby. This Prospectus does not contain all the information set
forth in the Registration Statement. For further information with respect to
the Company and the Exchange Offer, reference is made to the Registration
Statement. Statements made in this Prospectus as to the contents of any
contract, agreement or other document referred to are not necessarily
complete. With respect to each such contract, agreement or other document
filed as an exhibit to the Registration Statement, reference is made to the
exhibit for a more complete description of the document or matter involved,
and each such statement shall be deemed qualified in its entirety by such
reference.
 
  Upon the effectiveness of the Registration Statement of which this
Prospectus is a part, the Company will be subject to the informational
reporting requirements of the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), and in accordance therewith will file periodic reports and
other information with the Commission. Such periodic reports and other
information filed with the Commission, including the Registration Statement,
may be inspected without charge at the Public Reference Section of the
Commission at Room 1024, Judiciary Plaza, 450 Fifth Street, N.W., Washington,
D.C. 20549 and will also be available for inspection and copying at the
regional offices of the Commission located at Seven World Trade Center, 13th
Floor, New York, New York 10048 and Citicorp Center, 500 West Madison Street,
Suite 1400, Chicago, Illinois 60661. Copies of all or any portion of such
material may be obtained from the Public Reference Section of the Commission
upon payment of certain prescribed fees. In addition, the Commission maintains
a website that contains periodic reports and other information filed by
registrants such as the Company. This address of the website is
http://www.sec.gov. Copies of such material can also be obtained from the
Company upon request.
 
  While any Exchange Notes remain outstanding, the Company will make
available, on request, to any holder and any prospective purchaser of Exchange
Notes the information required pursuant to Rule 144A(d)(4) under the
Securities Act during any period in which the Company is not subject to
Section 13 or 15(d) of the Exchange Act.
 
                          FORWARD-LOOKING STATEMENTS
 
  This Prospectus, including the "Summary," "Management's Discussion and
Analysis of Financial Condition and Results of Operations" and "Business"
sections, contains "forward-looking statements" within the meaning of the
Private Securities Litigation Reform Act of 1995, which can be identified by
the use of forward-looking terminology, such as "may," "intend," "will,"
"expect," "anticipate," "plan," "the Company believes," "estimate,"
"continue," or "position" or the negative thereof or other variations thereon
or comparable terminology. In particular, any statements, express or implied,
concerning future operating results or the ability to generate revenues,
income or cash flow to service the Exchange Notes are forward-looking
statements. Investors in the Exchange Notes offered hereby are cautioned that
reliance on any forward-looking statements involves risks and uncertainties
and that, although the Company believes that the assumptions on which the
forward-looking statements contained herein are based are reasonable, any of
those assumptions could be incorrect, and actual results may differ materially
from any results indicated or suggested thereby. The uncertainties in this
regard include, but are not limited to, those identified herein under "Risk
Factors." In light of these and other uncertainties, the inclusion of a
forward-looking statement herein should not be regarded as a representation by
the Company that the Company's plans and objectives will be achieved. All
forward-looking statements are expressly qualified by such cautionary
statements, and the Company expressly disclaims any duty to update such
forward-looking statements.
 
                                       i
<PAGE>
 
                               OFFER TO EXCHANGE
 
              SERIES B 11 1/4% SENIOR SUBORDINATED NOTES DUE 2008
                              FOR ALL OUTSTANDING
              SERIES A 11 1/4% SENIOR SUBORDINATED NOTES DUE 2008
 
                 THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M.,
               NEW YORK CITY TIME ON     , 1998, UNLESS EXTENDED
 
  Great Lakes Dredge & Dock Corporation, a Delaware corporation ("Great Lakes"
or the "Company"), hereby offers to exchange an aggregate principal amount of
up to $115,000,000 of its Series B 11 1/4% Senior Subordinated Notes due 2008
(the "Exchange Notes") for a like principal amount of its Series A 11 1/4%
Senior Subordinated Notes due 2008 (the "Existing Notes") outstanding on the
date hereof (the "Exchange Offer"), upon the terms and subject to the
conditions set forth in this Prospectus and in the accompanying letter of
transmittal (the "Letter of Transmittal"). The Exchange Notes and the Existing
Notes are hereinafter collectively referred to as the "Notes."
 
  The terms of the Exchange Notes are identical in all material respects to
those of the Existing Notes, except that (i) interest on the Exchange Notes
shall accrue from the most recent date to which interest has been paid on the
Existing Notes surrendered in exchange therefor or, if no interest has been
paid on the Existing Notes, from August 19, 1998 and (ii) the Exchange Notes
are being registered under the Securities Act of 1933, as amended (the
"Securities Act"), and will not bear any legends restricting their transfer.
The Exchange Notes will evidence the same debt as the Existing Notes and will
be issued pursuant to, and entitled to the benefits of, the indenture
governing the Existing Notes. The Exchange Offer is being made in order to
satisfy certain contractual obligations of the Company.
 
  Interest on the Exchange Notes will be payable semi-annually on February 15
and August 15 of each year, commencing February 15, 1999 at a rate of 11 1/4%
per annum.
 
  The Exchange Notes will mature on August 15, 2008. The Exchange Notes will
be redeemable at the option of the Company, in whole or in part, on or after
August 15, 2003, at the redemption prices set forth herein, plus accrued and
unpaid interest, if any, to the date of redemption. At any time or from time
to time prior to August 15, 2003, the Company may redeem up to 35% of the
aggregate principal amount of the Notes originally issued at the redemption
price of 111.25% of the principal amount thereof, plus accrued and unpaid
interest, if any, to the date of redemption, with the net cash proceeds of one
or more Public Equity Offerings (as defined); provided, that at least 65% of
the aggregate principal amount of Notes originally issued remain outstanding
immediately thereafter. See "Description of Notes--Optional Redemption."
 
  Upon a Change of Control (as defined), each holder of Exchange Notes will
have the right to require the Company to repurchase all of such holder's
Exchange Notes at 101% of the principal amount thereof, plus accrued and
unpaid interest, if any, to the date of purchase. See "Description of Notes--
Repurchase at the Option of Holders--Change of Control."
 
  Holders whose Existing Notes are accepted for exchange will be deemed to
have waived the right to receive any interest or dividends accrued on the
Existing Notes.
 
                                                       (continued on next page)
 
  SEE "RISK FACTORS" COMMENCING ON PAGE 10 FOR A DISCUSSION OF CERTAIN MATTERS
THAT SHOULD BE CONSIDERED BY PROSPECTIVE INVESTORS.
 
THESE SECURITIES HAVE  NOT BEEN APPROVED OR DISAPPROVED BY  THE SECURITIES AND
 EXCHANGE  COMMISSION  OR  ANY  STATE   SECURITIES  COMMISSION  NOR  HAS  THE
  SECURITIES AND  EXCHANGE  COMMISSION  OR ANY  STATE  SECURITIES  COMMISSION
  PASSED   UPON  THE   ACCURACY  OR   ADEQUACY  OF   THIS  PROSPECTUS.   ANY
   REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
The date of this Prospectus is      , 1998
<PAGE>
 
   The Exchange Notes will be general unsecured obligations of the Company,
will rank subordinate in right of payment to all Senior Debt (as defined) and
will be senior or pari passu in right of payment to any future subordinated
indebtedness of the Company. The Company's obligations under the Exchange
Notes will be jointly and severally guaranteed (the "Subsidiary Guarantees")
by each of the Company's wholly owned domestic subsidiaries (the "Subsidiary
Guarantors"). The Subsidiary Guarantees will rank subordinate in right of
payment to all Senior Debt of each Subsidiary Guarantor, including each
Subsidiary Guarantor's guarantee of indebtedness under the New Credit Facility
(as defined). The Exchange Notes and the Subsidiary Guarantees will be
effectively subordinated to all liabilities, including trade payables, of the
Company's subsidiaries that are not Subsidiary Guarantors. As of June 30,
1998, on a pro forma basis after giving effect to the Transaction (as
defined), the Exchange Notes would have been subordinated to $62.7 million of
Senior Debt, excluding contingent obligations, and effectively subordinated to
$37.2 million of liabilities of the Company's subsidiaries that are not
Subsidiary Guarantors.
 
  The Company is offering the Exchange Notes in reliance on certain
interpretive letters issued by the staff of the Securities and Exchange
Commission (the "Commission") to third parties in unrelated transactions.
Based on such interpretive letters, the Company is of the view that holders of
Existing Notes (other than any holder who is an "affiliate" of the Company or
any Guarantor (as defined) within the meaning of Rule 405 under the Securities
Act) who exchange their Existing Notes for Exchange Notes pursuant to the
Exchange Offer generally may offer such Exchange Notes for resale, resell such
Exchange Notes and otherwise transfer such Exchange Notes without compliance
with the registration and prospectus delivery provisions of the Securities
Act, provided such Exchange Notes are acquired in the ordinary course of the
holders' business and such holders have no arrangement with any person to
participate in a distribution of such Exchange Notes. Each broker-dealer that
receives Exchange Notes for its own account pursuant to the Exchange Offer
must acknowledge that it will deliver a prospectus in connection with any
resale of such Exchange Notes. The Letter of Transmittal states that by so
acknowledging and by delivery of a prospectus, a broker-dealer will not be
deemed to admit that it is an "underwriter" within the meaning of the
Securities Act. This prospectus, at it may be amended or supplemented from
time to time, may be used by a broker-dealer in connection with resales of
Exchange Notes received in exchange for Existing Notes where such Existing
Notes were acquired by such broker-dealer as a result of market-making
activities or other trading activities. The Company has agreed that, for a
period of 180 days after the Expiration Date (as defined), it will make this
Prospectus available to any broker-dealer for use in connection with any such
resale. See "Plan of Distribution."
 
  Prior to the Exchange Offer there has been no public market for the Existing
Notes. If a market for the Exchange Notes should develop, such Exchange Notes
could trade at a discount from their principal amount. The Company currently
does not intend to list the Exchange Notes on any securities exchange or to
seek approval for quotation through any automated quotation system, and no
active public market for the Exchange Notes is currently anticipated. There
can be no assurance that an active public market for the Exchange Notes will
develop.
 
  The Exchange Offer is not conditioned upon any minimum principal amount of
Existing Notes being tendered for exchange pursuant to the Exchange Offer. The
Company will pay all the expenses incident to the Exchange Offer.
 
  THE EXCHANGE OFFER IS NOT BEING MADE TO, NOR WILL THE COMPANY ACCEPT
SURRENDERS FOR EXCHANGE FROM, HOLDERS OF EXISTING SECURITIES IN ANY
JURISDICTION IN WHICH THE EXCHANGE OFFER OR THE ACCEPTANCE THEREOF WOULD NOT
BE IN COMPLIANCE WITH THE SECURITIES OR BLUE SKY LAWS OF SUCH JURISDICTION.
<PAGE>
 
                                    SUMMARY
 
  The following summary is qualified in its entirety by, and should be read in
conjunction with, the more detailed information and consolidated financial
statements of the Company, including the notes thereto (the "Financial
Statements"), included elsewhere in this Prospectus. Unless otherwise noted,
the term "AcquisitionCo" means Great Lakes Dredge & Dock Acquisition, Inc. and
the "Company" or "Great Lakes" refers to Great Lakes Dredge & Dock Corporation
and its subsidiaries. As used herein (i)"Recapitalization" refers to the
recapitalization of the Company pursuant to the terms of the Merger Agreement
(as defined) by and among AcquisitionCo, the Company, the stockholders of the
Company and Vectura Holding Company LLC ("Vectura") and (ii) "Transaction"
refers to the Recapitalization, the financing of the Recapitalization and the
application of the proceeds of such financing. See "The Transaction."
References herein to "bid market share" mean the percentage represented by the
value of contracts bid upon and won by the Company divided by the value of all
contracts upon which the Company bid, including those the Company did not win
(valued at the price at which the contracts were awarded). As such, bid market
share data does not reflect market share data for all dredging activities.
 
                                  THE COMPANY
 
   Great Lakes is the largest provider of dredging services in the United
States. Dredging generally involves the enhancement or preservation of
navigability of waterways or the protection of shorelines through the removal
or replenishment of soil, sand or rock. The U.S. dredging market consists of
three primary types of work: Capital, Maintenance (including controlled
disposal dredging) and Beach Nourishment, in which activities the Company
achieved a combined bid market share in the U.S. of 54% in 1997. In addition,
the Company is the only U.S. dredging contractor with significant international
operations, which represented approximately 22% of its contract revenues in
1997. The Company's fleet of 25 dredges, 29 material transportation barges, two
drillboats, and 128 other specialized support vessels is the largest and most
diverse fleet in the U.S. The Company believes its fleet would cost in excess
of $600 million to build. For the twelve months ended June 30, 1998, the
Company's contract revenues and Adjusted EBITDA (as defined), were $276.9
million and $38.4 million, respectively. In addition, as of June 30, 1998, the
Company's contract backlog totaled approximately $178 million.
 
  Over its 108-year life, the Company has grown to be the leader in each of its
business activities in the U.S. The Company's three principal business
activities are:
 
  .  CAPITAL (approximately 43% of 1997 contract revenues). Capital dredging
     projects are primarily port expansion projects, which involve the
     deepening of channels to allow larger, deeper draft ships and providing
     land fill for building additional port facilities, thereby enhancing
     port profitability and competitiveness. Approximately 31% of the
     Company's Capital project contract revenues in 1997 derive from port
     projects sponsored by the U.S. Government ("Deep Port" projects). The
     Company's cumulative bid market share of Deep Port projects was 76% from
     1991 to 1997. Capital projects also include land reclamations, trench
     digging, and other construction-related dredging. The Company's bid
     market share of total U.S. Capital projects (including Deep Port
     projects) was 67% in 1997. Approximately 22% of the Company's contract
     revenues were attributable to non-U.S. Capital projects.
 
  .  MAINTENANCE (approximately 29% of 1997 contract revenues). Maintenance
     dredging consists of the redredging of waterways and harbors to remove
     silt, sand and other accumulated sediments. Due to natural
     sedimentation, active channels generally require Maintenance dredging
     every one to three years, thus creating a continuous source of dredging
     work that is typically non-deferrable if optimal navigability is to be
     maintained. The Company's bid market share of U.S. Maintenance projects
     was 28% in 1997.
 
 
                                       1
<PAGE>
 
  .  BEACH NOURISHMENT (approximately 23% of 1997 contract revenues). Beach
     Nourishment dredging projects generally involve moving sand from the
     ocean floor to shoreline locations when erosion has progressed to a
     stage that threatens substantial shoreline assets. The Company's bid
     market share of U.S. Beach Nourishment projects was 86% in 1997.
 
  The Company believes that it benefits from a number of favorable trends in
the U.S. dredging market. The average controlling depth of the top ten largest
U.S. ports, as measured by annual container volume, is 40.4 feet compared to
52.7 feet for the top ten non-U.S. ports worldwide. Without significant
deepening efforts, most major U.S. ports risk being unable to accommodate
larger cargo vessels, which renders them less competitive with deeper ports.
The Army Corps of Engineers (the "Corps"), which has the primary responsibility
for maintaining and improving the nation's waterways, ports and shorelines, has
recently announced 18 new Deep Port projects to be completed over the next
seven years, which the Corps estimates will have an aggregate dollar value in
excess of $2.2 billion. Funding for announced projects has also increased
significantly during the past 12 months due to increased federal funding and
increased cost sharing of Capital projects by local governments. In addition,
the Corps, which historically has performed a significant amount of domestic
Maintenance dredging projects, has substantially reduced its fleet from its
height of 42 dredges in 1976 to 12 dredges in 1998, and has recently idled the
largest of its four remaining hopper dredges, which are the only Corps dredges
that compete with the Company.
 
COMPETITIVE STRENGTHS
 
  The Company possesses a number of competitive strengths that have allowed it
to develop and maintain its leading position within the dredging industry,
including the following:
 
  FLEXIBLE PORTFOLIO OF ASSETS. The Company operates the largest and most
diverse dredging fleet in the U.S., which the Company believes would cost in
excess of $600 million to build. Great Lakes owns over 180 vessels including
approximately 40% of the vessels certified by the U.S. Coast Guard and American
Bureau of Shipping to perform offshore dredging operations, 47% of available
hopper dredge capacity, 33% of large capacity clamshell dredges operating in
the U.S., 100% of the drill boats in the U.S. and certain specialized
equipment, such as the only two large electric dredges in the U.S. The size and
breadth of the fleet improves the Company's competitiveness as it generally
permits the Company to select the most efficient equipment for a particular
job. To maintain the value and effectiveness of its fleet, the Company
emphasizes proactive maintenance that results in lower downtime, increased
profitability, enhanced vessel life and relatively low capital expenditure
requirements. To this end, the Company incurred $17.3 million of maintenance
expense in 1997 in addition to capital expenditures of $11.5 million.
 
  FAVORABLE COMPETITIVE DYNAMIC. Great Lakes is the largest U.S. provider of
dredging services and has consistently maintained a cumulative bid market share
of 38% since 1991, which is substantially greater than its nearest competitor's
share for those projects. In addition to operating and owning the industry's
largest and most diverse fleet, the Company believes that it benefits from a
number of significant advantages relative to both existing and potential
competitors, including: (i) the requirements of the Dredging Act of 1906 and
the Jones Act of 1920, which effectively prohibit foreign dredges and foreign-
owned dredging companies from competing in the U.S.; (ii) its being one of
three competitors that it believes are independently able to obtain performance
bonds in an amount greater than $50 million; (iii) the relatively high capital
costs associated with the construction of a new dredge, which the Company
estimates at between $10 to $50 million; and (iv) the Company's reputation for
quality and customer service built up over its 108 year operating history,
during which time it has never failed to complete a project. In addition, the
Company's long history as a leader in the industry has enabled it to develop a
proprietary database that contains detailed bidding and technical information
on most domestic dredging projects since 1970, which management believes allows
the Company, among other things, to be more accurate than its competitors in
predicting contract costs prior to bidding.
 
 
                                       2
<PAGE>
 
  SPECIALIZED CAPABILITY IN CAPITAL PROJECTS. Great Lakes believes it is the
leader in Capital dredging projects which generally require specialized
engineering expertise, specific combinations of equipment and experience in
performing complex projects. From 1991 to 1997, Great Lakes achieved a 38% U.S.
bid market share of the Capital projects. The Corps has recently announced 18
new Deep Port projects to be completed through 2005. The Corps has estimated
the aggregate dollar value of these projects to exceed $2.2 billion (of which
bidding for approximately $1.0 billion of such projects is scheduled to
commence in 1998) compared to $849 million of projects bid between 1986 and
1997. The Company's cumulative bid market share of Deep Port projects was 76%
from 1991 to 1997. The Company believes its extensive experience on complex
projects significantly enhances its ability to profitably bid and complete
these contracts.
 
  PROVEN, EXPERIENCED MANAGEMENT TEAM. The Company's senior managers include:
Douglas B. Mackie, President and Chief Executive Officer; Richard M. Lowry,
Executive Vice President and Chief Operating Officer; and Bruce J. Biemeck,
Senior Vice President and Chief Financial Officer, who have an average of 17
years of experience in the dredging industry. The Company believes that its
experienced management team provides it with a significant advantage over its
competitors, many of whom are family owned and managed. As a result of the
Transaction, the management of the Company owns approximately 16% of the issued
and outstanding common stock of Great Lakes.
 
BUSINESS STRATEGY
 
  The Company's strategy is to continue to grow contract revenues and cash flow
and strengthen its competitive position worldwide. The principal elements of
this strategy include:
 
  CONTINUE TO GROW IN DOMESTIC MARKETS. The Company expects to strengthen its
domestic leadership position by leveraging (i) the size and breadth of its
fleet, (ii) its industry-leading operating experience, (iii) its engineering
expertise, and (iv) its efficient project management practices. For example,
the Company has contracted to build a new backhoe at a cost of approximately
$18 million, which will enhance its ability to compete for and execute new Deep
Port projects. To further enhance the Company's operating capabilities, on July
27, 1998, the Company entered into an agreement with T.L. James & Company,
Inc., a significant competitor, to acquire, at a cost of approximately $14.5
million, a large hydraulic dredge and midsize hydraulic dredge together with
support equipment, inventory and spare parts. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations--Liquidity and
Capital Resources."
 
  GROW ESTABLISHED FOREIGN MARKET BASE. Since the early 1990s, a consolidation
among certain foreign competitors, together with an increase in foreign
governments' port infrastructure investments, have resulted in new overseas
dredging opportunities for Great Lakes. In 1997, the Company recorded
approximately $55.9 million in revenue from non-U.S. dredging projects. The
Company intends to continue to selectively pursue international opportunities
that offer it the potential to increase the utilization of its asset base, to
leverage its project management capabilities and to expand its non-U.S.
dredging market share.
 
  EXPLOIT GROWTH IN CONTROLLED DISPOSAL DREDGING. In recent years, in response
to more stringent regulations governing the disposal of dredged materials,
certain of the Company's projects have required dredged materials to be
disposed of in a more controlled manner. The Company believes it is well
positioned to exploit this trend due to its equipment mix, its operating
expertise and its joint venture with the owner and operator of two fully
permitted upland disposal sites in New Jersey, which represent a substantial
percentage of the upland disposal capacity in the greater New York City area.
During 1997, Great Lakes completed $12.0 million of controlled disposal
dredging projects. The Company has estimated that over $100 million of dredging
revenue related to projects requiring upland disposal is expected to be
completed through 2005 in New York and New Jersey.
 
                                       3
<PAGE>
 
                                THE TRANSACTION
 
  On July 20, 1998, AcquisitionCo, the Company, the stockholders of the
Company, Vectura and certain other entities entered into the Merger Agreement
providing for the recapitalization of the Company. Pursuant to the Merger
Agreement, AcquisitionCo, a wholly owned subsidiary of Vectura, merged with and
into the Company with the Company as the surviving corporation. As a result of
the Recapitalization, Vectura and certain others own in the aggregate
approximately 84% of outstanding common stock of the Company and certain
members of the management of the Company (the "Management Investors") own in
the aggregate approximately 16% of outstanding common stock of the Company. See
"The Transaction."
 
  The principal executive offices of the Company are located at 2122 York Road,
Oak Brook, Illinois 60521 and the telephone number is (630) 574-3000.
 
                               THE EXCHANGE OFFER
 
SECURITIES OFFERED..........  Up to $115,000,000 aggregate principal amount of
                              Series B 11 1/4% Senior Subordinated Notes Due
                              2008. The terms of the Exchange Notes and
                              Existing Notes are identical in all material
                              respects, except for certain transfer
                              restrictions and registration rights relating to
                              the Existing Notes.
 
THE EXCHANGE OFFER..........  The Exchange Notes are being offered in exchange
                              for a like principal amount of Existing Notes.
                              Existing Notes may be exchanged only in integral
                              multiples of $1,000. The issuance of the Exchange
                              Notes is intended to satisfy obligations of the
                              Company contained in the Registration Rights
                              Agreement (as defined).
 
EXPIRATION DATE; WITHDRAWAL
   OF TENDER................  The Exchange Offer will expire at 5:00 p.m., New
                              York City time, on      , 1998, or such later
                              date and time to which it may be extended by the
                              Company. The tender of Existing Notes pursuant to
                              the Exchange Offer may be withdrawn at any time
                              prior to the Expiration Date. Any Existing Notes
                              not accepted for exchange for any reason will be
                              returned without expense to the tendering holder
                              thereof as promptly as practicable after the
                              expiration or termination of the Exchange Offer.
 
CERTAIN CONDITIONS TO THE
   EXCHANGE OFFER.......      The Company's obligation to accept for exchange,
                              or to issue Exchange Notes in exchange for, any
                              Existing Notes is subject to certain customary
                              conditions relating to compliance with any
                              applicable law or any applicable interpretation
                              by the staff of the Commission, the receipt of
                              any applicable governmental approvals and the
                              absence of any actions or proceedings of any
                              governmental agency or court which could
                              materially impair the Company's ability to
                              consummate the Exchange Offer. The Company
                              currently expects that each of the conditions
                              will be satisfied and that no waivers will be
                              necessary. See "The Exchange Offer--Certain
                              Conditions to the Exchange Offer."
 
                                       4
<PAGE>
 
 
PROCEDURES FOR TENDERING
   EXISTING NOTES...........  Each holder of Existing Notes wishing to accept
                              the Exchange Offer must complete, sign and date
                              the Letter of Transmittal, or a facsimile
                              thereof, in accordance with the instructions
                              contained herein and therein, and mail or
                              otherwise deliver such Letter of Transmittal, or
                              such facsimile, together with such Existing Notes
                              and any other required documentation, to the
                              Exchange Agent (as defined) at the address set
                              forth herein. See "The Exchange Offer--Procedures
                              for Tendering Existing Notes."
 
USE OF PROCEEDS.............  The Company will not receive any proceeds from
                              the Exchange Offer.
 
EXCHANGE AGENT..............  The Bank of New York (the "Exchange Agent") is
                              serving as the Exchange Agent in connection with
                              the Exchange Offer.
 
FEDERAL INCOME TAX
   CONSEQUENCES.............  The exchange of Notes pursuant to the Exchange
                              Offer should not be a taxable event for federal
                              income tax purposes. See "Certain Federal Income
                              Tax Considerations."
 
    CONSEQUENCES OF EXCHANGING EXISTING NOTES PURSUANT TO THE EXCHANGE OFFER
 
  Based on certain interpretive letters issued by the staff of the Commission
to third parties in unrelated transactions, the Company is of the view that
holders of Existing Notes (other than any holder who is an "affiliate" of the
Company within the meaning of Rule 405 under the Securities Act) who exchange
their Existing Notes for Exchange Notes pursuant to the Exchange Offer
generally may offer such Exchange Notes for resale, resell such Exchange Notes
and otherwise transfer such Exchange Notes without compliance with the
registration and prospectus delivery provisions of the Securities Act, provided
such Exchange Notes are acquired in the ordinary course of the holders'
business and such holders have no arrangement or understanding with any person
to participate in a distribution of such Exchange Notes. If any holder of
Existing Notes is an affiliate of the Company, is engaged in or intends to
engage in or has any arrangement or understanding with any person to
participate in the distribution of the Exchange Notes to be acquired in the
Exchange Offer, such holder (i) could not relay on the applicable
interpretations of the Commission and (ii) must comply with the registration
requirements of the Securities Act in connection with any resale transaction.
Each broker-dealer that receives Exchange Notes for its own account in exchange
for Existing Notes must acknowledge that it will deliver a prospectus in
connection with any resale of such Exchange Notes. See "Plan of Distribution."
In addition, to comply with the securities laws of certain jurisdictions, if
applicable, the Exchange Notes may not be offered or sold unless they have been
registered or qualified for sale in such jurisdictions or in compliance with an
available exemption from registration or qualification. The Company has agreed,
pursuant to the Registration Rights Agreement and subject to certain specified
limitations therein, or register to qualify the Exchange Notes for offer or
sale under the securities or blue sky laws of such jurisdictions as any holder
of the Notes reasonably requests in writing. If a holder of Existing Notes does
not exchange such Existing Notes for Exchange Notes pursuant to the Exchange
Offer, such Existing Notes will continue to be subject to the restrictions on
transfer contained in the legend thereon. In general, the Existing Notes may
not be offered or sold, unless registered under the Securities Act, except
pursuant to an exemption from, or in a transaction not subject to, the
Securities Act and applicable state securities laws. Holders of Existing Notes
do not have any appraisal or dissenters' rights under the Delaware General
Corporation Law in connection with the Exchange Offer. See "The Exchange
Offer--Consequences of Failure to Exchange; Resales of Exchange Notes."
 
  The Existing Notes are currently eligible for trading in the Private
Offerings, Resales and Trading through Automated Linkages ("PORTAL") market.
Following commencement of the Exchange Offer but prior to its consummation, the
Existing Notes may continue to be traded in the PORTAL market. Following
consummation of the Exchange Offer, the Exchange Notes will not be eligible for
PORTAL trading.
 
                                       5
<PAGE>
 
                               THE EXCHANGE NOTES
 
SECURITIES OFFERED..........  $115 million in aggregate principal amount of
                              Series B 11 1/4% Senior Subordinated Notes due
                              2008.
 
MATURITY DATE...............  August 15, 2008.
 
INTEREST RATE ..............  The Exchange Notes will bear interest at the rate
                              of 11 1/4% per annum, payable semi-annually on
                              February 15 and August 15 of each year,
                              commencing February 15, 1999.
 
SUBSIDIARY GUARANTEES.......  The Exchange Notes will be jointly and severally
                              guaranteed on a senior subordinated basis by all
                              of the existing wholly owned domestic
                              subsidiaries of the Company.
 
SUBORDINATION...............  The Exchange Notes will be general unsecured
                              obligations of the Company, will rank subordinate
                              in right of payment to all Senior Debt and will
                              rank senior or pari passu in right of payment to
                              any future subordinated indebtedness of the
                              Company. The Subsidiary Guarantees will rank
                              subordinate in right of payment to all Senior
                              Debt of each Subsidiary Guarantor, including each
                              Subsidiary Guarantor's guarantee of indebtedness
                              under the New Credit Facility. The Exchange Notes
                              and the Subsidiary Guarantees will be effectively
                              subordinated to all liabilities, including trade
                              payables, of the Company's subsidiaries that are
                              not Subsidiary Guarantors. As of June 30, 1998,
                              on a pro forma basis after giving effect to the
                              Transaction, the Exchange Notes would have been
                              subordinated to $62.7 million of Senior Debt,
                              exclusive of contingent obligations, and
                              effectively subordinated to $37.2 million of
                              liabilities of the Company's subsidiaries that
                              are not Subsidiary Guarantors. See "Risk
                              Factors--Subordination."
 
OPTIONAL REDEMPTION.........  The Exchange Notes will be redeemable at the
                              option of the Company, in whole or in part, at
                              any time on or after August 15, 2003 in cash at
                              the redemption prices set forth herein, plus
                              accrued and unpaid interest and Liquidated
                              Damages, if any, thereon to the date of
                              redemption. In addition, at any time prior to
                              August 15, 2001, the Company may on any one or
                              more occasions redeem up to 35% of the aggregate
                              principal amount of Notes originally issued at a
                              redemption price equal to 111.25% of the
                              principal amount thereof, plus accrued and unpaid
                              interest and Liquidated Damages, if any, thereon
                              to the redemption date, with the net cash
                              proceeds of one or more Public Equity Offerings;
                              provided that at least 65% of the aggregate
                              principal amount of Notes originally issued
                              remain outstanding immediately after the
                              occurrence of such redemption. See "Description
                              of Notes--Optional Redemption."
 
CHANGE OF CONTROL...........  Upon the occurrence of a Change of Control, each
                              holder of Exchange Notes will have the right to
                              require the Company to repurchase all or any part
                              of such holder's Exchange Notes at an offer price
                              in cash equal to 101% of the aggregate principal
                              amount
 
                                       6
<PAGE>
 
                              thereof, plus accrued and unpaid interest and
                              Liquidated Damages, if any, thereon to the date
                              of purchase. See "Description of Notes--
                              Repurchase at the Option of Holders--Change of
                              Control." There can be no assurance that, in the
                              event of a Change of Control, the Company would
                              have sufficient funds to purchase all Exchange
                              Notes tendered. See "Risk Factors--Potential
                              Inability to Fund a Change of Control Offer."
 
CERTAIN COVENANTS...........  The Indenture contains certain covenants that
                              limit, among other things, the ability of the
                              Company to: (i) pay dividends, redeem capital
                              stock or make certain other restricted payments
                              or investments, (ii) incur additional
                              indebtedness or issue certain preferred equity
                              interests, (iii) merge, consolidate or sell all
                              or substantially all of its assets, (iv) create
                              certain liens on assets and (v) enter into
                              certain transactions with affiliates or related
                              persons. See "Description of Notes--Certain
                              Covenants."
 
REGISTRATION RIGHTS 
AGREEMENT...................  The Existing Notes were sold by the Company on
                              August 19, 1998 in a private placement. In
                              connection with the sale, the Company and the
                              Subsidiary Guarantors entered into a Registration
                              Rights Agreement (the "Registration Rights
                              Agreement") providing for, among other things,
                              the Exchange Offer. See "The Exchange Offer--
                              Purpose and Effect of the Exchange Offer."
 
                                  RISK FACTORS
 
FOR A DISCUSSION OF CERTAIN RISKS THAT SHOULD BE CONSIDERED IN EVALUATING AN
INVESTMENT IN THE EXCHANGE NOTES, SEE "RISK FACTORS."
 
                                       7
<PAGE>
 
 
                   SUMMARY CONDENSED FINANCIAL AND OTHER DATA
 
  The following table sets forth summary condensed financial and other data of
the Company. The historical financial data (except for EBITDA and Adjusted
EBITDA) for each of the three years ended December 31, 1997, have been derived
from, and should be read in conjunction with, the audited consolidated
financial statements of the Company and the related notes thereto included
elsewhere in this Prospectus. The historical financial data (except for EBITDA
and Adjusted EBITDA) for each of the two years ended December 31, 1994, have
been derived from the audited financial statements of the Company which are not
contained herein. The historical financial data (except for EBITDA and Adjusted
EBITDA) for the six-month periods ended June 30, 1997 and 1998, have been
derived from, and should be read in conjunction with, the unaudited
consolidated financial statements of the Company and the notes related thereto
included elsewhere herein. The historical financial data for the twelve months
ended June 30, 1998, have been derived from unaudited consolidated financial
statements prepared by the Company which are not contained herein. In the
opinion of management, interim financial statements reflect all adjustments
(consisting of normal recurring adjustments) necessary for a fair presentation
of the information presented for such periods. Results of operations for the
six-month period ended June 30, 1998, are not necessarily indicative of results
of operations for a full year or for future periods. The pro forma financial
data have been derived from the Unaudited Pro Forma Condensed Consolidated
Financial Statements and notes thereto included elsewhere herein. The pro forma
statement of income data for the periods presented were prepared to give effect
to the Transaction as if it occurred on January 1, 1997, and the pro forma
balance sheet data was prepared to give effect to the Transaction as if it had
occurred on June 30, 1998, and do not purport to represent what the Company's
operating results or financial position would have been or to project its
operating results or financial position for any future date. See "Unaudited Pro
Forma Condensed Consolidated Financial Statements," "Selected Financial and
Other Data," "Management's Discussion and Analysis of Financial Condition and
Results of Operations" and the historical financial statements and the related
notes thereto (the "Historical Financial Statements") included elsewhere in
this Prospectus.
 
<TABLE>
<CAPTION>
                                                                  SIX MONTHS      TWELVE
                                                                     ENDED        MONTHS
                              YEAR ENDED DECEMBER 31,              JUNE 30,       ENDED
                         --------------------------------------  --------------  JUNE 30,
                          1993    1994    1995    1996    1997    1997    1998     1998
                                           (DOLLARS IN MILLIONS)
<S>                      <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
STATEMENT OF INCOME
 DATA:
 Contract revenues...... $251.3  $269.6  $226.9  $235.9  $258.3  $108.4  $127.0   $276.9
 Gross profit...........   36.8    37.0     9.8    27.2    29.9     9.9    21.1     41.1
 Operating income
  (loss)................   16.1    17.1    (6.1)   10.8    11.0     0.8    11.2     21.4
 Interest expense, net..   (6.3)   (7.3)   (7.9)   (6.0)   (6.0)   (2.8)   (2.1)    (5.3)
 Net income (loss)......    6.5     4.7   (10.0)    2.0     3.8    (1.7)    4.7     10.2
OTHER DATA:
 Adjusted EBITDA(1)..... $ 31.0  $ 35.0  $ 16.0  $ 26.2  $ 28.8  $ 10.1  $ 19.7   $ 38.4
 Depreciation and
  amortization..........   13.4    14.1    14.7    13.9    13.6     6.9     7.3     14.0
 Maintenance expense(2).   12.3    11.1    15.4    14.7    17.3     8.1     8.7     17.9
 Capital expenditures...   12.8     7.4    11.5     5.4    11.5     3.5     5.9     13.9
PRO FORMA DATA:
 Cash interest expense(3)................................................         $ 18.0
 Ratio of Adjusted EBITDA to cash interest expense.......................            2.1x
 Ratio of total debt to Adjusted EBITDA(4)...............................            4.6x
</TABLE>
 
 
                                       8
<PAGE>
 
<TABLE>
<CAPTION>
                                   AS OF
                               JUNE 30, 1998
                             ------------------
                             ACTUAL AS ADJUSTED
<S>                          <C>       <C>
BALANCE SHEET DATA:
 Cash and cash equivalents.  $ 0.6     $ 0.6
 Working capital...........   39.2      31.7
 Total assets..............  234.9     234.0
 Total debt(5).............   50.6     177.7
 Total stockholders' equity
  (deficit)................   82.9     (47.0)
</TABLE>
- --------
(1) "EBITDA," as provided for herein, represents earnings from continuing
    operations before interest expense, net, income taxes and depreciation and
    amortization expense and excludes equity in earnings of joint ventures and
    minority interests. EBITDA is not intended to represent cash flow from
    operations as defined by generally accepted accounting principles. The
    Company's EBITDA is included in the Prospectus as it is a basis upon which
    the Company assesses its financial performance, and certain covenants in
    the Company's borrowing arrangements will be tied to similar measures.
    "Adjusted EBITDA" excludes the effects of certain items on the Company's
    historical EBITDA that are not expected to recur in the ongoing activities
    of the Company. Adjusted EBITDA is presented to provide additional
    information with respect to the ability of the Company to meet future debt
    service, capital expenditures and working capital requirements, but is not
    necessarily a measure of the Company's ability to fund its cash needs.
    EBITDA and Adjusted EBITDA should not be considered in isolation or as an
    alternative to net income, cash flows from continuing operations, or other
    consolidated income or cash flow data prepared in accordance with
    generally accepted accounting principals as measures of the Company's
    profitability or liquidity. EBITDA and Adjusted EBITDA as defined in this
    Prospectus may differ from similarly titled measures presented by other
    companies.
 
   The components of EBITDA and Adjusted EBITDA are set forth below for the
   periods indicated:
 
<TABLE>
<CAPTION>
                                                               SIX MONTHS   TWELVE
                                                                  ENDED     MONTHS
                                  YEAR ENDED DECEMBER 31,       JUNE 30,    ENDED
                               ------------------------------- ----------- JUNE 30,
                               1993  1994  1995   1996   1997  1997  1998    1998
                                             (DOLLARS IN MILLIONS)
     <S>                       <C>   <C>   <C>    <C>    <C>   <C>   <C>   <C>
     Operating income (loss).  $16.1 $17.1 $(6.1) $10.8  $11.0 $ 0.8 $11.2  $21.4
     Depreciation and
      amortization...........   13.4  14.1  14.7   13.9   13.6   6.9   7.3   14.0
                               ----- ----- -----  -----  ----- ----- -----  -----
     EBITDA..................   29.5  31.2   8.6   24.7   24.6   7.7  18.5   35.4
     Management fees paid to
      former stockholder.....    0.5   0.5          0.5    0.5   0.3   0.3    0.5
     Legal and other expenses
      related to the Chicago
      Flood Litigation.......    0.8   1.1   1.4    0.6    1.8   1.0          0.8
     Letter of credit fees
      associated with the
      Chicago Flood
      Litigation.............    0.2   0.6   0.2
     Disposed operations.....          0.3   0.2    1.5    1.9   1.1   0.9    1.7
     Settlement and other
      costs related to
      subcontract dispute....                5.6
     Other corporate charges.          1.3         (1.1)
                               ----- ----- -----  -----  ----- ----- -----  -----
     Adjusted EBITDA.........  $31.0 $35.0 $16.0  $26.2  $28.8 $10.1 $19.7  $38.4
                               ===== ===== =====  =====  ===== ===== =====  =====
</TABLE>
 
  For descriptions of each of the above components of Adjusted EBITDA, see
  "Management's Discussion and Analysis of Financial Condition and Results of
  Operations--Certain Items Affecting Results of Operations."
 
(2) Represents amount expended for maintenance included in costs of contract
    revenues.
(3) Pro forma cash interest is defined as interest expense exclusive of
    amortization of deferred financing fees.
(4) The ratio of total debt to Adjusted EBITDA was calculated based on pro
    forma total debt as of June 30, 1998, of $177.7 million. See
    "Capitalization." Pro forma total debt does not include approximately
    $14.5 million of debt anticipated to be incurred in respect of the planned
    acquisition of certain assets of a competitor. See "Management's
    Discussions and Analysis of Financial Condition and Results of
    Operations--Liquidity and Capital Resources."
(5) Total debt includes long-term debt and the current maturities of long-term
    debt and excludes contingent obligations.
 
 
                                       9
<PAGE>
 
                                 RISK FACTORS
 
  This Prospectus includes "forward looking statements" within the meaning of
Section 27A of the Securities Act and Section 21E of the Exchange Act.
Although the Company believes that its plans, intentions and expectations
reflected in such forward-looking statements are reasonable, it can give no
assurance that such plans, intentions or expectations will be achieved.
Important factors that could cause actual results to differ materially from
the Company's forward looking statements are set forth below and elsewhere in
this Prospectus. All forward-looking statements attributable to the Company or
persons acting on its behalf are expressly qualified in their entirety by the
cautionary statement set forth below.
 
SUBSTANTIAL LEVERAGE
 
  The Company is, and will continue after the Exchange Offer to be, highly
leveraged. On June 30, 1998, after giving pro forma effect to the Transaction,
the Company would have had total indebtedness of approximately $177.7 million
(excluding letters of credit, outstanding guarantees and bond obligations),
outstanding letters of credit with a face amount of approximately $10.0
million and a stockholders' deficit of approximately $47.0 million. The
Company has guaranteed up to $8.5 million of the outstanding indebtedness of
Amboy Aggregates Joint Venture ("Amboy"). The Company and its subsidiaries
will be permitted to incur additional indebtedness in the future. See
"Capitalization" and "Description of Notes--Certain Covenants."
 
  The Company's ability to make scheduled payments of principal of, or to pay
the interest or Liquidated Damages, if any, on, or to refinance, its
indebtedness (including the Notes), or to fund planned capital expenditures
will depend on its future performance, which, to a certain extent, is subject
to general economic, financial, competitive, legislative, regulatory and other
factors that are beyond its control. Based upon the current level of
operations, management believes that cash flow from operations, together with
available borrowings under the New Credit Facility, will be adequate to meet
the Company's future liquidity needs for at least the next several years. The
Company may, however, need to refinance all or a portion of the principal of
the Notes on or prior to maturity. There can be no assurance that the
Company's business will generate sufficient cash flow from operations, or that
future borrowings will be available under the New Credit Facility in an amount
sufficient to enable the Company to service its indebtedness, including the
Notes, or to fund its other liquidity needs. In addition, there can be no
assurance that the Company will be able to effect any such refinancing on
commercially reasonable terms or at all. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations--Liquidity and
Capital Resources."
 
  The degree to which the Company will be leveraged following the Offering
could have important consequences to holders of the Notes, including, but not
limited to: (i) making it more difficult for the Company to satisfy its
obligations with respect to the Notes, (ii) increasing the Company's
vulnerability to general adverse economic and industry conditions, (iii)
limiting the Company's ability to obtain additional financing to fund future
working capital, capital expenditures and other general corporate
requirements, (iv) requiring the dedication of a substantial portion of the
Company's cash flow from operations to the payment of principal of, and
interest on, its indebtedness, thereby reducing the availability of such cash
flow to fund working capital, capital expenditures or other general corporate
purposes, (v) limiting the Company's flexibility in planning for, or reacting
to, changes in its business and the industry, and (vi) placing the Company at
a competitive disadvantage vis-a-vis less leveraged competitors. In addition,
the Indenture, the New Credit Facility and the New Bonding Agreement will
contain financial and other restrictive covenants that will limit the ability
of the Company to, among other things, borrow additional funds. Failure by the
Company to comply with such covenants could result in an event of default
which, if not cured or waived, could have a material adverse effect on the
Company. In addition, the degree to which the Company is leveraged could
prevent it from repurchasing all of the Notes tendered to it upon the
occurrence of a Change of Control. See "Description of Notes--Repurchase at
the Option of Holders--Change of Control" and "Description of the New Credit
Facility."
 
  In the ordinary course of its business the Company is often required to
obtain bid, payment and performance bonds (in the United States) and bank
guarantees (outside the United States) in order to qualify for, and be
 
                                      10
<PAGE>
 
awarded projects. In the event the Company were to default on a contract, the
bonding company would be required either to complete the contract or to
reimburse the project sponsor for the cost of completion. In such event, the
Company will be obligated to reimburse the bonding company for the amount it
expended plus, in the event the bonding company completed the project itself,
a reasonable profit thereon. Pursuant to the bonding agreement to be entered
into by the Company and the Subsidiary Guarantors upon consummation of the
Transaction, the Company's and the Subsidiary Guarantors' obligations are
secured by a security interest in certain of the Company's fixed assets. In
the event the Company or any of the Subsidiary Guarantors fails or is unable
to complete the work under a bonded contract or breaches the New Bonding
Agreement, the bonding company may proceed against their collateral, cause the
performance of such bonded contract by subletting it in the name of the
Company or its wholly owned subsidiary and seek reimbursement from the Company
and its wholly owned subsidiary for costs incurred on the subletting or
performance of such bonded contract. The total amount of bonds outstanding
varies with the dollar value of contracts in process; however, the face amount
of outstanding bonds typically overstates the associated contingent liability
to the extent of the portion of the related projects which have been completed
by the Company. The Company estimates that as of June 30, 1998, approximately
$450.0 million of bonds were outstanding. See "Description of New Bonding
Agreement."
 
SUBORDINATION
 
  The Notes are subordinated in right of payment of all current and future
Senior Debt of the Company and the Subsidiary Guarantors. Upon any
distribution to creditors of the Company or any Subsidiary Guarantor in a
liquidation or dissolution of the Company or any Subsidiary Guarantor or in a
bankruptcy, reorganization, insolvency, receivership or similar proceeding
relating to the Company or any Subsidiary Guarantor or their respective
properties, an assignment for the benefit of creditors or any marshalling of
the Company's or any Subsidiary Guarantor's assets and liabilities, the
holders of Senior Debt will be entitled to be paid in full before any payment
may be made with respect to the Notes. In addition, the subordination
provisions of the Indenture provide that payments with respect to the Notes
will be blocked in the event of a payment default on Senior Debt and may be
blocked for up to 179 days each year in the event of certain non-payment
defaults on Senior Debt. In the event of a bankruptcy, liquidation or
reorganization of the Company or any Subsidiary Guarantor, holders of the
Notes will participate ratably with all holders of subordinated indebtedness
of the Company or any such Subsidiary Guarantor that is deemed to be of the
same class as the Notes, and potentially with all other general creditors of
the Company or any such Subsidiary Guarantor, based upon the respective
amounts owed to each holder or creditor, in the remaining assets of the
Company or any such Subsidiary Guarantor. In any of the foregoing events,
there can be no assurance that there would be sufficient assets to pay amounts
due on the Notes. As a result, holders of Notes may receive less, ratably,
than the holders of Senior Debt.
 
  As of June 30, 1998, on a pro forma basis after giving effect to the
Transaction, the aggregate amount of Senior Debt of the Company and its
Restricted Subsidiaries (including borrowings under the New Credit Facility
but excluding letters of credit, guarantees and outstanding bond obligations)
would have been approximately $62.7 million, and approximately $37.9 million
would have been available for additional borrowing under the New Credit
Facility. Senior Debt will also include the Company's letters of credit,
guarantees and bonding obligations in effect from time to time. The Indenture
permits the incurrence of substantial additional indebtedness, including
Senior Debt, by the Company and its Restricted Subsidiaries in the future. See
"Description of the New Credit Facility."
 
  While the Company's obligations under the Notes are guaranteed by all of the
Company's wholly-owned domestic Restricted Subsidiaries, non-wholly owned and
foreign subsidiaries, representing 22.9% of the Company's total assets as of
June 30, 1998, and 20.7% of the Company's 1997 contract revenues, do not
provide guarantees of the Notes or the New Credit Facility. Consequently, the
Company's obligations under the Notes are effectively subordinated to the
indebtedness and other liabilities of such Subsidiaries. Any right of the
Company to receive assets of any of such Subsidiaries upon the latter's
liquidation or reorganization (and the consequent right of the Holders of the
Notes to participate in those assets) will be effectively subordinated to the
claims of that Subsidiary's creditors, except to the extent that the Company
is itself recognized as a creditor of
 
                                      11
<PAGE>
 
such Subsidiary, in which case the claims of the Company would still be
subordinate to any security in the assets of such Subsidiary and any
indebtedness of such Subsidiary senior to that held by the Company. As of June
30, 1998, such Subsidiaries would have had approximately $37.2 million of
liabilities (including trade payables) and other liabilities outstanding. In
addition, after payment to creditors the Company's rights against non-
Guarantor Subsidiaries will effectively rank pari passu with minority
interests in the Company's subsidiaries which are not Subsidiary Guarantors.
As a general partner of Amboy, the Company is liable for the liabilities of
Amboy (other than non-recourse liabilities), which aggregated approximately
$13.9 million as of December 31, 1997.
 
BACKLOG; RISKS ASSOCIATED WITH FIXED PRICE CONTRACTS
 
  The Company's contracts backlog represents management's estimate of the
revenues which will be realized under the Company's contracts remaining to be
performed based upon estimates relating to, among other things, the time
required to mobilize the necessary assets at the project site, the amount of
material necessary to be dredged and the time necessary to demobilize the
project assets. However, such estimates are necessarily subject to
fluctuations based upon the amount of material which actually must be dredged,
as well as factors affecting the time required to complete the job.
Consequently, backlog is not necessarily indicative of future sales. In
addition, because all of the Company's backlog relates to government
contracts, the Company's order backlog can be canceled at any time without
penalty, except, in some cases, the recovery of the Company's actual committed
costs and profit on work performed up to the date of cancellation. See "--
Dependence on Government Contracts and Funding."
 
  Further, the estimated size of a contract is not necessarily indicative of
the profitability of that contract. Substantially all of the Company's
contracts with its customers are fixed-price contracts. Under a fixed-price
contract, the customer agrees to pay a specified price for the Company's
performance of the entire contract. Fixed-price contracts carry inherent
risks, including risks of losses from underestimating costs, operational
difficulties and other changes that may occur over the contract period. One of
the most significant factors which can affect the profitability of a project
is the weather at the project site. Inclement or hazardous weather conditions
can result in substantial delays in dredging and contract losses. For example,
in 1995, the east coast of the United States was struck by the most severe
hurricane and tropical storms experienced in over 60 years. These storms
caused certain of the Company's 1995 Beach Nourishment projects to be delayed
until 1996, which significantly affected the Company's Beach Nourishment
contract revenues and profits in 1995. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations." There can be no
assurance that the Company will be able to perform its obligations under such
fixed-price contracts without incurring such losses. If the Company were to
significantly underestimate the cost of one or more significant contracts, the
resulting losses could have a material adverse effect on the Company.
 
DEPENDENCE ON GOVERNMENT CONTRACTS AND FUNDING
 
  Substantially all of the Company's revenues have been, and are expected to
continue to be, attributable to contracts with federal, state and other
government agencies or with companies operating under contracts with such
government agencies. Government contracts are typically subject to termination
at any time, on relatively short notice, at the election of the applicable
government agency involved even if the Company is performing its obligation
thereunder. Cancellation of significant contracts or the failure of the
Company to win significant contracts could have a material adverse effect on
the Company. In addition, the Company's operations depend on project funding
by various government agencies and may be adversely affected by the level and
timing of such funding. Lack of funding has, in the past, substantially
delayed scheduled projects, including projects that have been put up for bid.
Many of the projects authorized by WORDA (as defined) in 1986 were
substantially delayed due to lack of funding. Recently the Corps has scheduled
in excess of $2.2 billion of projects to be bid on and completed by 2005.
There can be no assurance that these projects will be bid or executed on the
published schedules or at all.
 
  Substantially all of the Company's contracts are, and will continue to be,
awarded based on competitive bidding. In the United States, such contracts are
awarded to the lowest adequately bonded bidder, regardless of a
 
                                      12
<PAGE>
 
bidder's relationship with the project sponsor, work on past projects,
reputation or similar factors. There can be
no assurance that the Company's competitors will not bid more aggressively
than the Company for contracts or that the Company will continue to achieve
bid market shares at the levels that it has achieved historically.
 
  Some dredging government contracts are awarded through a negotiated
procurement process in which the contractor submits a proposal and cost and
pricing data to the government, and the contractor and the government
negotiate the contract price. Under such contracts, the government has the
right, after award and/or completion of the contract, to audit the
contractor's books and records, including the proposal and data available to
the contractor during negotiations to ensure compliance with the contract and
applicable federal legislation, rules and regulations. The government may seek
a price adjustment based on the results of such audit.
 
DEPENDENCE ON BONDING
 
  The Company, like all dredging service providers, generally is required to
post bonds in connection with its dredging contracts to insure job completion
if the Company should fail to finish a project. Upon consummation of the
transaction, the Company entered into the New Bonding Agreement with Reliance
Insurance Company, United Pacific Insurance Company, Reliance Insurance
Company of New York and United Pacific Insurance Company of New York
(collectively, the "Sureties") pursuant to which the Sureties act as surety,
issue bid bonds, performance bonds and payment bonds and obligate themselves
upon other contracts of guaranty required by the Company in the day-to-day
operations of its dredging and marine construction business. However, the
Sureties are not obligated under the New Bonding Agreement to issue bonds on
behalf of the Company. No bond issued on behalf of the Company has ever been
drawn upon in the Company's 108-year history. However, the Company's business
would be materially and adversely affected if the Company were unable to
obtain bonding for future projects.
 
  The New Bonding Agreement contains financial and operating covenants that
limit the ability of the Company to incur indebtedness, create liens, pay
dividends and to take certain other corporate actions. A default by the
Company under the New Bonding Agreement permits the Sureties to proceed
against collateral that includes most of the Company's operating equipment.
See "Business--Bidding and Foreign Projects Guarantees" and "Description of
New Bonding Agreement."
 
OPERATING RISKS
 
  The business of dredging is generally subject to a number of risks and
hazards, including environmental hazards, industrial accidents, labor
disputes, encountering unusual or unexpected geological formations, cave-ins
of below water tunnels, collisions with fixed objects, disruption of
transportation services and flooding. The foregoing risks could result in
damage to or destruction of dredges and transportation vessels as well as
personal injury, environmental damage, delays in dredging, monetary losses and
possible legal liability. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations." For example, in 1992, an
underwater utility tunnel located beneath the Chicago Loop failed adjacent to
a construction tunnel and building basements serviced by the tunnel. Numerous
suits were filed against the Company for claims of flood damage and losses due
to business interruption (the "Chicago Flood Litigation"). See "Business--
Legal and Environmental Matters." Although all remaining claims relating to
the Chicago Flood Litigation were settled in 1997, there can be no assurance
that the Company's operations will not be adversely affected in the future by
similar or other conditions attributable to the foregoing risks. Although the
Company maintains insurance within ranges of coverage consistent with industry
practice, no assurance can be given that such insurance will be available at
economically feasible premiums.
 
POTENTIAL LIABILITY AND INSURANCE COVERAGE
 
  The Company insures the Company's risks up to certain policy limits and
subject to certain deductibles. Management makes estimates and assumptions
that affect the reported amount of liability and the disclosure of contingent
liabilities. As claims develop, it is possible that the ultimate results of
these claims may differ from
 
                                      13
<PAGE>
 
management's estimates. There can be no assurance that the dollar amount of
the Company's liabilities will not materially exceed the insurance policy
limits.
 
  In addition, premiums and deductibles for liability insurance could increase
to the point that such insurance becomes prohibitively expensive, or
unavailable. The failure to obtain adequate insurance could effect the
Company's ability to bid on, or execute, significant projects, or obtain
adequate bonding or financing.
 
RISKS ASSOCIATED WITH INTERNATIONAL OPERATIONS
 
  A significant portion of the Company's current operations are conducted
abroad. International operations are subject to numerous additional risks,
including the impact of foreign government regulations, currency fluctuations,
political uncertainties and differences in business practices. There can be no
assurance that foreign governments will not adopt regulations or take other
actions that would have a direct or indirect adverse impact on the business or
market opportunities of the Company within such governments' countries.
Furthermore, there can be no assurance that the political, cultural and
economic climate outside the United States will be favorable to the Company's
operations and growth strategy.
 
  In addition, the Company has benefited in recent years from the substantial
investment in foreign port infrastructure, particularly in the Pacific Rim.
Because many international dredging contractors have concentrated significant
assets in the Pacific Rim projects, the Company has enjoyed less competition
in areas such as the Middle East, Africa and South America. However, if the
recent economic recession in South East Asia were to adversely affect the
investment in South East Asian port facilities, the Company could be faced
with substantial increased competition in the foreign markets that it has
competed in, which could have a material adverse effect on the Company.
 
FLUCTUATIONS IN OPERATIONS
 
  A substantial portion of the Company's revenues and earnings are
attributable to a limited number of significant multiyear contracts. Quarterly
results can fluctuate significantly based upon the number and size of
contracts undertaken and the timing of the initiation of projects under such
contracts. Revenues and earnings can vary from year to year based on the
number and size of such contracts and the timing of project performance. As a
result of the foregoing, results of operations may fluctuate from year to
year. The Company typically realizes lower revenues and earnings in the first
and fourth calendar quarters of each year. During any quarter, projects can be
delayed and revenues and earnings may be adversely affected by severe weather
conditions at job sites. As a result of the foregoing, results of operations
for any one quarter may not be indicative of results for any other quarters or
for the year. See "Management's Discussion and Analysis of Financial Condition
and Results of Operations." Substantial fluctuations in the Company's results
in operations may adversely affect the Company's ability to service its debt
or satisfy its other liquidity needs in a particular period, which could have
a material adverse effect on the Company.
 
GOVERNMENT REGULATION
 
  The Company is subject to government regulation pursuant to the dredging
statute (46 U.S.C. Section 292) which protects the United States dredging
industry from competition from foreign-built dredges. The law prohibits
foreign-built vessels (absent special legislative action) from competing in
the United States dredging market. Dredges operating in the navigable waters
of the United States must also meet the coastwise trade requirements of the
Jones Act (Section 27 of the Merchant Marine Act, 1920) and Section 2 of the
Shipping Act, 1916, as amended, and must have a coastwise endorsement pursuant
to the Vessel Documentation Act (46 U.S.C. Section 12101 et seq.). These acts
prohibit vessels owned or controlled by entities which are less than 75% owned
and controlled by United States citizens from transporting dredged material
between points in the United States.
 
 
                                      14
<PAGE>
 
  In addition, in 1995, a government agency commenced an investigation into
purported bid-rigging in the U.S. dredging industry. To date, the Company is
not aware of any action against any participant in the U.S dredging industry
related to such investigation. The Company does not engage in collusive
bidding practices, and knows of no such practices in the U.S. dredging
industry. However, there can be no assurance that additional investigations
into purported bid-rigging will not occur or that the Company will not be a
subject of such investigations. See "Business--Legal and Environmental
Matters."
 
ENVIRONMENTAL MATTERS
 
  The Company's operations and facilities are subject to a variety of federal
and state environmental statutes and regulations, including those regulating
dredging operations, the disposal of dredged material, wetlands, storm and
waste water discharges, air emissions and the handling of certain substances.
The scope of such statutes and regulations and parties liable thereunder have
been afforded broad interpretations by state and federal regulators and
courts. In addition, the Company is required to comply with federal and state
statutes designed to protect certain species and habitats. Such compliance can
delay the authorization of, appropriation with respect to, and performance of,
particular projects and increase expenses in connection therewith.
 
  The Company cannot predict what environmental laws will be enacted in the
future, how existing or future environmental laws will be administered or
interpreted or what environmental conditions may be found to exist on its
properties. Compliance with more stringent environmental laws, as well as more
vigorous enforcement policies of the regulatory agencies or stricter
interpretation of those laws, and discovery of new conditions may require
additional expenditure by the Company. There can be no assurance that one or
more of the foregoing will not have a material adverse effect on the Company.
See "Business--Legal and Environmental Matters."
 
ATTRACTION AND RETENTION OF QUALIFIED PROFESSIONALS; UNIONIZED LABOR FORCE
 
  The Company's ability to retain and expand its staff of qualified
professionals is an important factor in determining the Company's future
success. The market for qualified professionals is competitive and there can
be no assurances that the Company will continue to be successful in its
efforts to attract and retain such professionals. In addition, the Company
relies heavily upon the experience and ability of its senior executive staff
and the loss of any or a significant portion of such individuals could have a
material adverse effect on the Company.
 
  A significant portion of the Company's hourly work force is represented by
various unions. The Company has experienced strikes from time to time by
certain of those unions. See "Business--Employees." There can be no assurance
that future strikes, employee slowdowns or similar actions by one or more
unions will not have a material adverse effect on the Company.
 
CONTROL OF THE COMPANY
 
  As a result of the Recapitalization, Vectura owns approximately 49.9% of the
outstanding voting capital stock and all of the non-voting capital stock of
the Company. Pursuant to the Stockholders Agreement among Vectura, the
Company, Management Investors and certain other stockholders of the Company,
Vectura will have the right to appoint up to two of the five directors of the
Company.
 
  As a result of the Recapitalization, Vectura and the Company's directors,
the Management Investors and their affiliates control all of the voting power
represented by the Company's outstanding shares of capital stock. Accordingly,
those stockholders have the ability, if acting in concert, to control the
outcome of elections of matters presented for approval by the stockholders of
the Company. Such concentration of ownership may have the effect of preventing
a change in control of the Company. There can be no assurance that the
interests of Vectura and its affiliates will not conflict with the interests
of the holders of the Notes. See "Management;" "Ownership of Capital Stock"
and "Description of Capital Stock."
 
 
                                      15
<PAGE>
 
RESTRICTIVE DEBT COVENANTS
 
  The New Credit Facility, the New Bonding Agreement and the Indenture contain
numerous restrictive financial and operating covenants that limit the
discretion of the Company's management with respect to certain business
matters. These covenants place significant restrictions on, among other
things, the ability of the Company and its subsidiaries to dispose of assets,
incur additional indebtedness, incur guarantee obligations, repay other
indebtedness or amend other debt instruments (including the Indenture), pay
dividends, create liens on assets, enter into sale and leaseback transactions,
make investments, loans or advances, make acquisitions, engage in mergers or
consolidations, make capital expenditures, or engage in certain transactions
with affiliates and otherwise restrict corporate activities. In addition,
under the New Credit Facility and the New Bonding Agreement, the Company is
required to comply with specified financial ratios and tests, including
minimum interest coverage ratios, maximum leverage ratios, annual capital
expenditure limitations and net worth tests, which, if not met, may trigger an
event of default under the New Credit Facility or the New Bonding Agreement,
which have a material adverse effect on the Company. See "Description of the
New Credit Facility;" "Description of New Bonding Agreement" and "Description
of Notes."
 
POTENTIAL INABILITY TO FUND A CHANGE OF CONTROL OFFER
 
  Upon a Change of Control, the Company will be required to offer to
repurchase all outstanding Notes at 101% of the principal amount thereof plus
accrued and unpaid interest and Liquidated Damages, if any, to the date of
repurchase. Prior to commencing such an offer to purchase, the Company may be
required to (i) repay in full all indebtedness of the Company that would
prohibit the repurchase of the Notes, including the New Credit Facility or
(ii) obtain any consent required to make the repurchase. If the Company is
unable to repay all of such indebtedness or is unable to obtain the necessary
consents, the Company will be unable to offer to purchase the Notes and that
failure will constitute an Event of Default under the Indenture. In addition,
there can be no assurance that sufficient funds will be available at the time
of any Change of Control to make any required repurchases of Notes tendered or
that restrictions in the New Credit Facility will allow the Company to make
such required repurchases. Notwithstanding these provisions, the Company could
enter into certain transactions, including certain recapitalizations, that
would not constitute a Change of Control but would increase the amount of debt
outstanding at such time. See "Description of Notes--Repurchase at the Option
of Holders--Change of Control."
 
FRAUDULENT CONVEYANCE STATUTES
 
  Under applicable provisions of federal bankruptcy law or comparable
provisions of state fraudulent transfer law, if, among other things, the
Company or any Subsidiary Guarantor, at the time it incurred the indebtedness
evidences by the Notes or its Subsidiary Guarantee, (i) (a) was or is
insolvent or rendered insolvent by reason of such occurrence or (b) was or is
engaged in a business or transaction for which the assets remaining with the
Company or such Subsidiary Guarantor constituted unreasonably small capital or
(c) intended or intends to incur, or believed or believes that it would incur,
debts beyond its ability to pay such debts as they mature, and (ii) the
Company or such Subsidiary Guarantor received or receives less than reasonably
equivalent value or fair consideration for the incurrence of such
indebtedness, then the Notes and the Subsidiary Guarantees, and any pledge or
other security interest securing such indebtedness, could be avoided, or
claims in respect of the Notes or the Subsidiary Guarantees could be
subordinated to all other debts of the Company or such Subsidiary Guarantor,
as the case may be. In addition, the payment of interest and principal by the
Company pursuant to the Notes or the payment of amounts by a Subsidiary
Guarantor pursuant to a Subsidiary Guarantee could be avoided and required to
be returned to the person making such payment, or to a fund for the benefit of
the creditors of the Company or such Subsidiary Guarantor, as the case may be.
 
  The measures of insolvency for purposes of the foregoing considerations will
vary depending upon the law applied in any proceeding with respect to the
foregoing. Generally, however, the Company or a Subsidiary Guarantor would be
considered insolvent if (i) the sum of its debts, including contingent
liabilities, were greater than the saleable value of all of its assets at fair
valuation or if the present fair saleable value of its assets were
 
                                      16
<PAGE>
 
less than the amount that would be required to pay its probable liability on
its existing debts, including contingent liabilities, as they become absolute
and mature or (ii) it could not pay its debts as they become due.
 
  On the basis of historical financial information, recent operating history
and other factors, the Company believes that, after giving effect to the
indebtedness incurred in connection with the Transaction, neither it nor the
Subsidiary Guarantors were insolvent, had unreasonably small capital for the
business in which it is engaged or incurred debts beyond its ability to pay
such debts as they mature. There can be no assurance, however, as to what
standard a court would apply in making such determinations or that a court
would agree with the Company's conclusions in this regard.
 
YEAR 2000 ISSUE
 
  Historically, many computer programs have been written using two digits
rather than four to define the applicable year, which could result in the
program failing to recognize a year that begins with "20" instead of "19".
This, in turn, could result in major system failures or miscalculations, and
is generally referred to as the "Year 2000 issue".
 
  In June 1996, the Company's MIS Department developed a plan to identify and
address issues related to Year 2000 compliance. The Company's internal systems
were the primary focus of the plan. At that time, the Company compiled an
inventory of its internally developed and third party software. The Company
also evaluated various solutions and techniques for making its internally
developed databases and programs Year 2000 ready. The Company prioritized the
tasks taking into account the likelihood of Year 2000 failure, the impact of
Year 2000 failure on its business, and the effort required to complete the
task. In March 1997, senior management of the Company reviewed the tasks and
approved the plan.
 
  The Company's Year 2000 Plan contemplated four phases--assessment,
implementation, testing and release/installation--which overlap to a degree.
The Company has completed all phases for its most critical systems. The
Company is currently in the implementation, testing and installation phase for
its less critical systems and anticipates completing the final installation
phase during the fourth quarter of 1998. Some non-critical systems will be
addressed during calendar year 1999 and the Company believes such systems are
not material to its operations.
 
  The Company has received information concerning the Year 2000 status of
certain critical suppliers, and anticipates initiating more extensive
inquiries with significant suppliers during the fourth quarter of 1998 to
determine the extent to which the Company is vulnerable to those third
parties' failure to remediate their own Year 2000 issues.
 
  The Company currently estimates that the total cost of implementing its Year
2000 Plan, consisting primarily of increased staffing requirements and outside
consulting services, will not be material. This estimate is based on presently
available information and will be updated as the Company continues its
assessment and proceeds with implementation.
 
  If the Company's computer systems fail with respect to the Year 2000 Issue,
or if any applications or embedded chips critical to the Company's reporting
process are overlooked there could be a material adverse effect on the
business, results of operations or financial condition of the Company.
Additionally, there can be no assurance that the systems of other companies on
which the Company's systems rely will be timely converted, or that a failure
to convert by another company would not have material adverse effect on the
business, results of operations or financial condition of the Company. The
Company has not yet established a contingency plan in this regard, but intends
to formulate one to address unavoided or unavoidable risks and expects to have
the contingency plan formulated by July 1999.
 
 
                                      17
<PAGE>
 
ABSENCE OF PUBLIC MARKET; RESTRICTIONS ON TRANSFER
 
  The Existing Notes are eligible for trading in PORTAL. The Exchange Notes
are new securities for which there is no established market. There can be no
assurance as to the existence of any market for the Exchange Note, the
liquidity of any markets that may develop for the Notes, the ability of
holders of the Notes to sell their Notes, or the prices at which holders would
be able to sell their Notes. Future trading prices of the Notes will depend on
many factors, including, among other things, prevailing interest rates, the
Company's operating results and the market for similar securities. The Initial
Purchaser has advised the Company that it currently intends to make a market
in the Notes. However, it is not obligated to do so and any market making may
be discontinued at any time without notice. The Company does not intend to
apply for listing of the Notes on any securities exchange.
                                THE TRANSACTION
 
  Pursuant to the Agreement and Plan of Merger dated July 20, 1998 (as
thereafter amended, the "Merger Agreement") among Vectura, AcquisitionCo, GLI
Acquisition, Inc., the Company, Great Lakes International, Inc., Blackstone
Dredging Partners L.P. ("Blackstone L.P.) and Blackstone Family Investment
Partnership I L.P. (collectively with Blackstone L.P., "Sellers"), the
following transactions occurred prior to, or concurrent with, the issuance of
the Existing Notes: (i) immediately prior to consummation of the
Recapitalization, certain members of the management of the Company who held
vested non-qualified stock options ("Options") representing approximately 7%
of the capital stock of the Company on a fully diluted basis exercised the
Options, and (ii) at the closing of the Recapitalization, AcquisitionCo and
the Company merged (the "Merger"), with the Company being the surviving
corporation. Upon the effectiveness of the Merger, the capital stock of the
Company was converted into consideration of $221.0 million, less outstanding
indebtedness of the Company for borrowed money at the closing, less any
obligation of the Company to pay bonuses to employees of the Company as a
result of consummation of the Recapitalization (the "Transaction Bonuses"),
less Sellers' expenses in connection with the Merger, plus cash paid or
indebtedness incurred in connection with the acquisition of certain assets
from a competitor of the Company, plus the right to receive a cash amount
equal to the amount expended by the Company prior to the closing in connection
with the construction of a backhoe dredge, which the Company estimates was
approximately $4.0 million at closing, plus the aggregate exercise price of
the Options. Upon consummation of the Merger, the Company immediately issued
the Existing Notes and borrowed the necessary proceeds under the New Credit
Facility to fund the Recapitalization. Additionally, the Management Investors
received common stock and preferred stock of the Company in the Merger.
Pursuant to the Merger Agreement, the Company has also agreed to pay to
Sellers, upon receipt, the amount due the Company as reimbursement from
certain insurance companies for amounts advanced by the Company in settlement
of liability claims in connection with the Chicago Flood Litigation, which
amounts equaled approximately $11.0 million.
 
  Following consummation of the Recapitalization, Vectura, whose membership
interests are owned by 399 Venture Partners, Inc., an affiliate of Citicorp
Venture Capital Ltd., and certain others own approximately 84% of the
outstanding common stock of the Company and the Management Investors own in
the aggregate approximately 16% of outstanding common stock of the Company.
 
                                   * * * * *
 
  The Company's principal executive offices are located at 2122 York Road, Oak
Brook, Illinois 60521. The telephone number of the Company's executive office
is (630) 574-3000.
 
                                USE OF PROCEEDS
 
  The Company will not receive any proceeds from the Exchange Offer. The gross
proceeds of $115.0 million received by the Company from the sale of the
Existing Notes, together with borrowings totaling $62.1 million under the New
Credit Facility, and proceeds of $50.0 million from the Equity Contribution,
were used by the Company: (i) to fund the cash purchase price payable in
connection with the Recapitalization and (ii) to pay fees and expenses in
connection with the Transaction.
 
                                      18
<PAGE>
 
                                CAPITALIZATION
 
  The following table sets forth as of June 30, 1998, (i) the actual cash and
capitalization of the Company and (ii) the unaudited pro forma cash and
capitalization of the Company, as adjusted to give effect to the Transaction.
The following table should be read in conjunction with the "Unaudited Pro
Forma Condensed Consolidated Financial Statements" and the notes thereto and
the Historical Financial Statements included elsewhere in this Prospectus.
 
<TABLE>
<CAPTION>
                                                                 AS OF JUNE 30,
                                                                      1998
                                                                 ---------------
                                                                           AS
                                                                 ACTUAL ADJUSTED
                                                                   (DOLLARS IN
                                                                    MILLIONS)
<S>                                                              <C>    <C>
Cash and cash equivalents....................................... $  0.6  $  0.6
                                                                 ======  ======
Total debt:
Existing Credit Facility........................................ $ 50.0  $   --
New Credit Facility(1):
 Revolving Credit Facility(2)(3)................................     --     7.1
 Term Loan......................................................     --    55.0
11 1/4% Senior Subordinated Notes due 2008......................     --   115.0
Other...........................................................    0.6     0.6
                                                                 ------  ------
  Total debt(4).................................................   50.6   177.7
Stockholders' equity (deficit)..................................   82.9   (47.0)
                                                                 ------  ------
  Total capitalization.......................................... $133.5  $130.7
                                                                 ======  ======
</TABLE>
- --------
(1)  See "Management's Discussion and Analysis of Financial Condition and
     Results of Operations--Liquidity and Capital Resources" and "Description
     of the New Credit Facility."
(2) Approximately $10.0 million face amount of letters of credit were issued
    and outstanding upon consummation of the Transaction under the $55.0
    million Revolving Credit Facility and approximately $37.9 million of
    borrowings were available to the Company upon consummation of the
    Transaction under the Revolving Credit Facility for working capital and
    general corporate purposes.
(3) In July 1998, the Company entered into an agreement to acquire two
    hydraulic dredges, certain support vessels and operating inventory from a
    competitor for approximately $14.5 million. The Company expects to
    initially finance the purchase price for such assets with borrowings under
    the Revolving Credit Facility. The Company expects to refinance
    approximately $10.0 million of such borrowings after the consummation of
    the Transaction with an operating lease. The Company anticipates the
    acquisition will close by the end of August 1998.
(4) Total debt includes long-term debt and the current maturities of long-term
    debt and excludes contingent obligations.
 
                                      19
<PAGE>
 
        UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
 
  The following Unaudited Pro Forma Condensed Consolidated Financial
Statements of the Company consist of an Unaudited Pro Forma Condensed
Consolidated Balance Sheet as of June 30, 1998, and Unaudited Pro Forma
Condensed Consolidated Statements of Income for the six months ended June 30,
1997 and 1998, and for the year ended December 31, 1997, and for the twelve
months ended June 30, 1998, and were derived from the Company's historical
consolidated financial statements included elsewhere herein, as adjusted to
illustrate the effects of the Transaction. The unaudited pro forma adjustments
were applied to the respective historical consolidated financial statements to
reflect and account for the Transaction as a recapitalization. Accordingly,
the historical basis of the Company's assets and liabilities has not been
impacted by the Transaction.
 
  The Unaudited Pro Forma Condensed Consolidated Balance Sheet gives effect to
the Transaction as if it had occurred on June 30, 1998. The Unaudited Pro
Forma Condensed Consolidated Statements of Income give effect to the
Transaction as if it had occurred on January 1, 1997. The unaudited pro forma
adjustments are based upon currently available information and upon certain
assumptions that the Company's management believes are reasonable under the
circumstances. The Unaudited Pro Forma Condensed Consolidated Financial
Statements do not purport to represent what the Company's actual results of
operations, net income or actual financial position would have been if the
Transaction had in fact occurred on such dates or to project the Company's
results of operations or financial position for any future period or date. The
Unaudited Pro Forma Condensed Consolidated Financial Statements do not give
effect to any transactions other than the Recapitalization and related
transactions (the "Transaction" defined elsewhere herein) and those discussed
in the notes to the Unaudited Pro Forma Condensed Consolidated Financial
Statements set forth below.
 
  The Unaudited Pro Forma Condensed Consolidated Financial Statements and
accompanying notes should be read in conjunction with "Management's Discussion
and Analysis of Financial Condition and Results of Operations," the historical
consolidated financial statements of the Company, including the notes thereto,
and other financial information included elsewhere in this Prospectus.
 
                                      20
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
            UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                              AS OF JUNE 30, 1998
                             (DOLLARS IN MILLIONS)
 
<TABLE>
<CAPTION>
                                            HISTORICAL ADJUSTMENTS   AS ADJUSTED
<S>                                         <C>        <C>           <C>
ASSETS
Cash and equivalents.......................   $  0.6     $   -- (a)    $  0.6
Accounts receivable, net...................     43.5         --          43.5
Contract revenues in excess of billings....      6.7         --           6.7
Inventories................................      9.6         --           9.6
Other current assets.......................     19.9      (11.0)(b)
                                                            5.4 (c)      14.3
                                              ------     ------        ------
  Total current assets.....................     80.3       (5.6)         74.7
Property and equipment, net................    137.3         --         137.3
Inventories................................      6.7         --           6.7
Investments in joint ventures..............      9.0         --           9.0
Other assets...............................      1.6        6.3 (d)
                                                           (1.6)(e)       6.3
                                              ------     ------        ------
  Total assets.............................   $234.9     $ (0.9)       $234.0
                                              ======     ======        ======
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable...........................   $ 22.6     $   --        $ 22.6
Accrued expenses and other.................     18.3       (3.6)(c)
                                                            2.5 (f)
                                                            3.0 (g)      20.2
Current maturities of long-term debt.......      0.2         --           0.2
                                              ------     ------        ------
  Total current liabilities................     41.1        1.9          43.0
Long term debt.............................     50.4      (50.0)(a)
                                                           55.0 (a)
                                                          115.0 (a)
                                                            7.1 (a)     177.5
Deferred income taxes......................     47.2         --          47.2
Other......................................     10.2         --          10.2
                                              ------     ------        ------
  Total liabilities........................    148.9      129.0         277.9
Minority interests.........................      3.1         --           3.1
Stockholders' equity (deficit).............     82.9     (129.9)(h)     (47.0)
                                              ------     ------        ------
  Total liabilities and stockholders'
   equity (deficit)........................   $234.9     $ (0.9)       $234.0
                                              ======     ======        ======
</TABLE>
 
     See Notes to Unaudited Pro Forma Condensed Consolidated Balance Sheet
 
                                       21
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
           UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                             (DOLLARS IN MILLIONS)
 
  (a) The estimated sources and uses of cash of the Transaction are as
follows:
 
<TABLE>
     <S>                                                                 <C>
     SOURCES OF FUNDS:
     Borrowings under Revolving Credit Facility......................... $  7.1
     Proceeds from Term Loan............................................   55.0
     Existing Notes.....................................................  115.0
     Equity Contribution................................................   50.0
                                                                         ------
                                                                         $227.1
                                                                         ======
     USES OF FUNDS:
     Recapitalization of the Company:
       Redemption of common stock....................................... $164.0
       Deferred redemption payment......................................   (2.5)
       Transaction-related bonuses paid.................................    5.6
       Repayment of debt................................................   50.0
     Estimated transaction fees and expenses............................   10.0
                                                                         ------
                                                                         $227.1
                                                                         ======
</TABLE>
 
    The Unaudited Pro Forma Condensed Consolidated Balance Sheet gives
    effect to the Transaction as if it had occurred on June 30, 1998. The
    repayment of debt, the deferred redemption payment, and the Redemption
    of common stock reflected herein are based on amounts reflected in the
    Company's historical consolidated financial statements as of June 30,
    1998. Any changes in those amounts between June 30, 1998, and the
    Closing date may impact the resulting stockholders' equity (deficit).
 
    Approximately $10.0 million of letters of credit were issued and
    outstanding at closing under the $55.0 million Revolving Credit
    Facility and therefore approximately $37.9 million of borrowings were
    available to the Company at closing under the Revolving Credit Facility
    for working capital and general corporate purposes.
 
  (b) To reflect the Seller's retention, pursuant to the Merger Agreement, of
      the amount due the Company as reimbursement from certain insurance
      companies for amounts advanced by the Company in settlement of liability
      claims in connection with the Chicago Flood Litigation.
 
  (c) To record the estimated income tax effects as a result of the following:
      approximately $3.1 benefit related to compensation expense as a result
      of management's exercise of the Options; approximately $3.6 benefit
      related to compensation expense associated with Transaction-related
      bonuses; approximately $1.6 benefit related to the transaction fees and
      expenses incurred in connection with the Recapitalization; and
      approximately $0.7 benefit related to the write-off of deferred
      financing costs associated with the debt being repaid.
 
  (d) To record the estimated transaction fees and expenses attributable to
      the Financings which will be amortized over the term of the related
      debt. Certain fees and expenses incurred in connection with the
      Recapitalization of approximately $3.7 ($2.1 net of tax) were expensed.
 
  (e) To record the write-off of deferred financing costs of $1.6 ($0.9 net of
      tax) associated with the debt repaid at the closing of the Transaction.
 
  (f) To record the estimated deferred redemption payment related to amounts
      expended by the Company in connection with the construction of a backhoe
      dredge. Amounts expended by the Company prior to the closing of the
      Recapitalization were approximately $4.0. The $2.5 represents
      expenditures through June 30, 1998 and the difference between this
      amount and the actual amount at closing was reflected as an increase in
      current liabilities of the Company.
 
                                      22
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
            UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                             (DOLLARS IN MILLIONS)
 
  (g) To record the estimated additional Transaction-related bonuses to be paid
to Management Investors.
 
  (h) To record the impact on stockholders' equity (deficit) as a result of the
Transaction:
 
<TABLE>
     <S>                                                               <C>
     Redemption of common stock....................................... $(164.0)
     Equity Contribution..............................................    50.0
     Seller's retention of insurance receivable (see pro forma
      adjustment(b))..................................................   (11.0)
     Transaction related and additional bonuses (see pro forma
      adjustment(g))..................................................    (8.6)
     Transaction fees and expenses (see pro forma adjustments(a) and
      (d))............................................................    (3.7)
     Write-off of deferred financing costs (see pro forma
      adjustment(e))..................................................    (1.6)
     Tax effect (see pro forma adjustment(c)).........................     9.0
                                                                       -------
                                                                       $(129.9)
                                                                       =======
</TABLE>
 
                                       23
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
         UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF INCOME
                      FOR THE YEAR ENDED DECEMBER 31, 1997
                             (DOLLARS IN MILLIONS)
 
<TABLE>
<CAPTION>
                                        HISTORICAL ADJUSTMENTS(F) AS ADJUSTED(F)
<S>                                     <C>        <C>            <C>
Contract revenues.....................    $258.3          --          $258.3
Costs of contract revenues............     228.4          --           228.4
                                          ------       -----          ------
  Gross profit........................      29.9          --            29.9
General and administrative expenses...      18.9        (0.5)(a)        18.4
                                          ------       -----          ------
  Operating income....................      11.0         0.5            11.5
Interest expense, net.................      (6.0)      (12.7)(b)       (18.7)
Equity in earnings of joint ventures..       3.1          --             3.1
                                          ------       -----          ------
  Income (loss) before income taxes
   and minority interests.............       8.1       (12.2)           (4.1)
Income taxes..........................      (2.6)        5.1 (c)         2.5
Minority interests....................      (1.7)         --            (1.7)
                                          ------       -----          ------
  Net income (loss)...................    $  3.8       $(7.1)         $ (3.3)
                                          ======       =====
Accrued dividends on Preferred
 Stock(d).............................                                  (5.4)
                                                                      ------
  Net income available to Common
   Stock..............................                                $ (8.7)
                                                                      ======
Ratio of earnings to fixed charges(e).       1.7x                         --
 
         UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF INCOME
                   FOR THE TWELVE MONTHS ENDED JUNE 30, 1998
                             (DOLLARS IN MILLIONS)
 
<CAPTION>
                                        HISTORICAL ADJUSTMENTS(F) AS ADJUSTED(F)
<S>                                     <C>        <C>            <C>
Contract revenues.....................    $276.9          --          $276.9
Costs of contract revenues............     235.8          --           235.8
                                          ------       -----          ------
  Gross profit........................      41.1          --            41.1
General and administrative expenses...      19.7        (0.5)(a)        19.2
                                          ------       -----          ------
  Operating income....................      21.4         0.5            21.9
Interest expense, net.................      (5.3)      (13.4)(b)       (18.7)
Equity in earnings of joint ventures..       2.9          --             2.9
                                          ------       -----          ------
  Income before income taxes and
   minority interests.................      19.0       (12.9)            6.1
Income taxes..........................      (7.0)        5.4 (c)        (1.6)
Minority interests....................      (1.8)         --            (1.8)
                                          ------       -----          ------
  Net income..........................    $ 10.2       $(7.5)         $  2.7
                                          ======       =====
Accrued dividends on Preferred
 Stock(d).............................                                  (5.4)
                                                                      ------
  Net income available to Common
   Stock..............................                                $ (2.7)
                                                                      ======
Ratio of earnings to fixed charges(e).       3.7x                        1.1x
</TABLE>
 
  See Notes to Unaudited Pro Forma Condensed Consolidated Statements of Income
 
                                       24
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
         UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF INCOME
                     FOR THE SIX MONTHS ENDED JUNE 30, 1998
                             (DOLLARS IN MILLIONS)
 
<TABLE>
<CAPTION>
                                        HISTORICAL ADJUSTMENTS(F) AS ADJUSTED(F)
<S>                                     <C>        <C>            <C>
Contract revenues.....................    $127.0          --          $127.0
Costs of contract revenues............     105.9          --           105.9
                                          ------       -----          ------
  Gross profit........................      21.1          --            21.1
General and administrative expenses...       9.9        (0.3)(a)         9.6
                                          ------       -----          ------
  Operating income....................      11.2         0.3            11.5
Interest expense, net.................      (2.1)       (7.3)(b)        (9.4)
Equity in earnings of joint ventures..       0.4          --             0.4
                                          ------       -----          ------
  Income before income taxes and
   minority interests.................       9.5        (7.0)            2.5
Income taxes..........................      (3.5)        2.9 (c)        (0.6)
Minority interests....................      (1.3)         --            (1.3)
                                          ------       -----          ------
  Net income..........................    $  4.7       $(4.1)         $  0.6
                                          ======       =====
Accrued dividends on Preferred
 Stock(d).............................                                  (2.7)
                                                                      ------
  Net income available to Common
   Stock..............................                                $ (2.1)
                                                                      ======
Ratio of earnings to fixed charges(e).       4.5x                        1.1x
</TABLE>
 
         UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF INCOME
                     FOR THE SIX MONTHS ENDED JUNE 30, 1997
                             (DOLLARS IN MILLIONS)
 
<TABLE>
<CAPTION>
                                        HISTORICAL ADJUSTMENTS(F) AS ADJUSTED(F)
<S>                                     <C>        <C>            <C>
Contract revenues.....................    $108.4          --          $108.4
Costs of contract revenues............      98.5          --            98.5
                                          ------       -----          ------
  Gross profit........................       9.9          --             9.9
General and administrative expenses...       9.1        (0.3)(a)         8.8
                                          ------       -----          ------
  Operating income....................       0.8         0.3             1.1
Interest expense, net.................      (2.8)       (6.6)(b)        (9.4)
Equity in earnings of joint ventures..       0.6                         0.6
                                          ------       -----          ------
  Income (loss) before income taxes
   and minority interests.............      (1.4)       (6.3)           (7.7)
Income taxes..........................       0.9         2.6 (c)         3.5
Minority interests....................      (1.2)         --            (1.2)
                                          ------       -----          ------
  Net income (loss)...................    $ (1.7)      $(3.7)         $ (5.4)
                                          ======       =====
Accrued dividends on Preferred
 Stock(d).............................                                  (2.7)
                                                                      ------
  Net income available to Common
   Stock..............................                                $ (8.1)
                                                                      ======
Ratio of earnings to fixed charges(e).        --                          --
</TABLE>
 
  See Notes to Unaudited Pro Forma Condensed Consolidated Statements of Income
 
                                       25
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
   NOTES TO UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENTS OF INCOME
                             (DOLLARS IN MILLIONS)
 
  (a) To eliminate the management fee charged by the Seller as subsequent to
      the Transaction, such fee will no longer be incurred.
 
  (b) The unaudited pro forma adjustments to interest expense reflect the
      following:
 
<TABLE>
<CAPTION>
                                                          SIX MONTHS     TWELVE
                                                             ENDED       MONTHS
                                              YEAR ENDED   JUNE 30,      ENDED
                                             DECEMBER 31, ------------  JUNE 30,
                                                 1997     1997   1998     1998
   <S>                                       <C>          <C>    <C>    <C>
   Interest expense on debt repaid(1)......     $(5.8)    $(2.8) $(2.1)  $(5.1)
   Interest expense on Term Loan (7.65% per
    annum)(2)..............................       4.2       2.1    2.1     4.2
   Interest expense on Revolving Credit
    Facility (7.65% per annum)(2)..........       0.5       0.3    0.3     0.5
   Interest expense on Notes (11.25% per
    annum).................................      12.9       6.5    6.5    12.9
   Amortization of deferred financing
    costs..................................       0.6       0.3    0.3     0.6
   Other borrowing costs...................       0.3       0.2    0.2     0.3
                                                -----     -----  -----   -----
     Net adjustments.......................     $12.7     $ 6.6  $ 7.3   $13.4
                                                =====     =====  =====   =====
</TABLE>
  --------
   (1) Interest expense includes amortization of deferred financing costs,
       agents' fees, and unused facility fees.
   (2) Interest rates with respect to borrowings under the Term Loan and
       Revolving Credit Facility are variable. An increase of 0.125% in
       interest rates on borrowings under the Term Loan and Revolving
       Credit Facility would increase pro forma interest by $0.1 annually.
 
  (c) To reflect the estimated tax effects of the unaudited pro forma
adjustments.
 
  (d) Represents dividends on the Company's issuance of Preferred Stock as
      part of the Recapitalization. The Preferred Stock will accrue dividends
      at a rate of 12%, compounded annually. See "Description of Capital
      Stock."
 
  (e) Earnings used in computing the ratio of earnings to fixed charges
      consists of earnings before provision for income taxes plus distributed
      income of joint ventures and fixed charges. Fixed charges are defined as
      interest expense including the amortization of deferred financing costs.
      For the year ended December 31, 1997, pro forma earnings were
      insufficient to cover fixed charges by $8.0 million. For the six months
      ended June 30, 1997, pro forma earnings were insufficient to cover fixed
      charges by $9.4 million. For the six months ended June 30, 1997,
      earnings were insufficient to cover fixed charges by $3.2 million.
 
  (f) The unaudited pro forma adjustments and the Unaudited Pro Forma
      Condensed Consolidated Statements of Income do not reflect an estimated
      $19.0 ($11.0 net of tax) of nonrecurring costs expected to be incurred
      in connection with the Transaction. This amount relates to:
      approximately $8.6 ($5.0 net of tax) of estimated compensation expense
      as a result of Transaction-related bonuses; approximately $3.7 ($2.1 net
      of tax) of estimated transaction fees and expenses incurred in
      connection with the Recapitalization; approximately $1.6 ($0.9 net of
      tax) related to the write-off of deferred financing costs associated
      with the debt being repaid; and approximately $5.1 ($3.0 net of tax) of
      estimated compensation expense related to the cash settlement of a
      portion of management's Options exercised.
 
                                      26
<PAGE>
 
                       SELECTED FINANCIAL AND OTHER DATA
 
  The following table presents selected historical financial and other data of
the Company for the periods indicated. The historical financial data (except
for EBITDA and Adjusted EBITDA) for each of the three years ended December 31,
1997, have been derived from, and should be read in conjunction with, the
audited consolidated financial statements of the Company and the related notes
thereto included elsewhere in this Prospectus. The historical financial data
(except for EBITDA and Adjusted EBITDA) for the two years ended December 31,
1994, have been derived from the audited consolidated financial statements of
the Company which are not contained herein. The historical financial data
(except for EBITDA and Adjusted EBITDA) for each of the two six month periods
ended June 30, 1997 and 1998, have been derived from, and should be read in
conjunction with, the unaudited consolidated financial statements of the
Company and the notes related thereto included elsewhere herein. In the
opinion of management, information for interim periods includes all
adjustments (consisting of normal recurring adjustments) considered necessary
for a fair presentation of the financial position and results of operations of
the Company for such periods. Results for interim periods are not indicative
of results for a full year or indicative of future periods. The selected
historical consolidated financial data set forth below should be read in
conjunction with "Management's Discussion and Analysis of Financial Condition
and Results of Operations" and the Financial Statements included elsewhere in
this Prospectus.
 
<TABLE>
<CAPTION>
                                                                   SIX MONTHS
                                                                      ENDED
                               YEAR ENDED DECEMBER 31,              JUNE 30,
                          --------------------------------------  --------------
                           1993    1994    1995    1996    1997    1997    1998
                                       (DOLLARS IN MILLIONS)
<S>                       <C>     <C>     <C>     <C>     <C>     <C>     <C>
STATEMENT OF INCOME
 DATA:
Contract revenues.......  $251.3  $269.6  $226.9  $235.9  $258.3  $108.4  $127.0
Costs of contract
 revenues(1)............  (214.5) (232.6) (217.1) (208.7) (228.4)  (98.5) (105.9)
                          ------  ------  ------  ------  ------  ------  ------
 Gross profit...........    36.8    37.0     9.8    27.2    29.9     9.9    21.1
General and
 administrative
 expenses...............   (20.7)  (19.9)  (15.9)  (16.4)  (18.9)   (9.1)   (9.9)
                          ------  ------  ------  ------  ------  ------  ------
 Operating income
  (loss)................    16.1    17.1    (6.1)   10.8    11.0     0.8    11.2
Interest expenses, net..    (6.3)   (7.3)   (7.9)   (6.0)   (6.0)   (2.8)   (2.1)
Equity in earnings of
 joint ventures.........     2.4     2.1     1.3     1.1     3.1     0.6     0.4
Other non-operating
 expenses...............    (0.4)     --      --      --      --      --      --
                          ------  ------  ------  ------  ------  ------  ------
 Income (loss) before
  income taxes, minority
  interests and
  discontinued
  operations............    11.8    11.9   (12.7)    5.9     8.1    (1.4)    9.5
Income tax (expense)
 benefit................    (4.8)   (4.6)    4.2    (2.4)   (2.6)    0.9    (3.5)
Minority interests......    (0.7)   (1.0)   (1.2)   (0.4)   (1.7)   (1.2)   (1.3)
                          ------  ------  ------  ------  ------  ------  ------
 Income (loss) from
  continuing operations.     6.3     6.3    (9.7)    3.1     3.8    (1.7)    4.7
Extraordinary item net
 of tax effect..........            (1.9)
Discontinued operations.     0.2     0.3    (0.3)   (1.1)     --      --      --
                          ------  ------  ------  ------  ------  ------  ------
 Net income (loss)......  $  6.5  $  4.7  $(10.0) $  2.0  $  3.8  $ (1.7) $  4.7
                          ======  ======  ======  ======  ======  ======  ======
Ratio of earnings to
 fixed charges(2).......     2.6     2.6      --     1.8     1.7      --     4.5
OTHER DATA:
Adjusted EBITDA(3)......  $ 31.0  $ 35.0  $ 16.0  $ 26.2  $ 28.8  $ 10.1  $ 19.7
Net cash flows from
 operating activities...    19.3    13.4    (3.7)   24.7    13.6    (3.3)   11.4
Depreciation and
 amortization...........    13.4    14.1    14.7    13.9    13.6     6.9     7.3
Maintenance expenses(4).    12.3    11.1    15.4    14.7    17.3     8.1     8.7
Capital expenditures....    12.8     7.4    11.5     5.4    11.5     3.5     5.9
BALANCE SHEET DATA:
Cash and cash
 equivalents............  $  1.9  $  3.5  $  2.3  $  1.9  $  1.7  $  2.6  $  0.6
Working capital.........    12.5    20.6    26.9    22.0    41.6    23.2    39.2
Total assets............   263.7   278.0   266.0   222.1   245.6   240.8   234.9
Total debt(5)...........    75.5    70.3    76.8    52.4    57.6    64.1    50.6
Total stockholders'
 equity ................    77.6    82.3    72.3    74.4    78.2    72.7    82.9
</TABLE>
 
                                      27
<PAGE>
 
- --------
(1) During interim periods the Company prepays or accrues fixed equipment
    costs and amortizes the expenses in proportion to revenues recognized over
    the year to better match revenues and expenses. See "Management's
    Discussion and Analysis of Financial Condition and Results of Operations."
(2) Earnings used in computing the ratio of earnings to fixed charges consists
    of earnings before provision for income taxes plus distributed income of
    joint ventures and fixed charges. Fixed charges are defined as interest
    expense including the amortization of deferred financing costs. For the
    year ended December 31, 1995, and the six months ended June 30, 1997,
    earnings were insufficient to cover fixed charges by $9.6 million and $3.2
    million, respectively.
(3) "EBITDA," as provided herein, represents earnings from continuing
    operations before interest expense, net, income taxes and depreciation and
    amortization expense and excludes equity earnings of joint ventures and
    minority interests. EBITDA is not intended to represent cash flow from
    operations as defined by generally accepted accounting principles. The
    Company's EBITDA is included in the Prospectus as it is a basis upon which
    the Company assesses its financial performance, and certain covenants in
    the Company's borrowing arrangements will be tied to similar measures.
    "Adjusted EBITDA" excludes the effects of certain items on the Company's
    historical EBITDA that are not expected to recur in the ongoing activities
    of the Company. Adjusted EBITDA is presented to provide additional
    information with respect to the ability of the Company to meet future debt
    service, capital expenditures and working capital requirements, but is not
    necessarily a measure of the Company's ability to fund its cash needs.
    EBITDA and Adjusted EBITDA should not be considered in isolation or as an
    alternative to net income, cash flows from continuing operations, or other
    consolidated income or cash flow data prepared in accordance with
    generally accepted accounting principles as measures of the Company's
    profitability or liquidity. EBITDA and Adjusted EBITDA as defined in this
    Prospectus may differ from similarly titled measures presented by other
    companies.
  The components of EBITDA and Adjusted EBITDA are set forth below for the
    periods indicated:
 
<TABLE>
<CAPTION>
                                                                 SIX MONTHS
                                                                    ENDED
                                    YEAR ENDED DECEMBER 31,       JUNE 30,
                                 ------------------------------- -----------
                                 1993  1994  1995   1996   1997  1997  1998
                                             (DOLLARS IN MILLIONS)
     <S>                         <C>   <C>   <C>    <C>    <C>   <C>   <C>  
     Operating income (loss)...  $16.1 $17.1 $(6.1) $10.8  $11.0 $ 0.8 $11.2
     Depreciation and
      amortization.............   13.4  14.1  14.7   13.9   13.6   6.9   7.3
                                 ----- ----- -----  -----  ----- ----- -----
     EBITDA....................   29.5  31.2   8.6   24.7   24.6   7.7  18.5
     Management fees paid to
      former stockholder.......    0.5   0.5          0.5    0.5   0.3   0.3
     Legal and other expenses
      related to the Chicago
      Flood Litigation.........    0.8   1.1   1.4    0.6    1.8   1.0
     Letter of credit fees
      associated with the
      Chicago Flood Litigation.    0.2   0.6   0.2
     Disposed operations.......          0.3   0.2    1.5    1.9   1.1   0.9
     Settlement and other costs
      related to subcontract
      dispute..................                5.6
     Other corporate charges...          1.3         (1.1)
                                 ----- ----- -----  -----  ----- ----- -----
     Adjusted EBITDA...........  $31.0 $35.0 $16.0  $26.2  $28.8 $10.1 $19.7
                                 ===== ===== =====  =====  ===== ===== =====
</TABLE>
 
  For descriptions of each of the above components of Adjusted EBITDA, see
  "Management's Discussion and Analysis of Financial Condition and Results of
  Operations--Certain Items Affecting Results of Operations."
 
(4) Represents amount expended for maintenance included in costs of contract
    revenues.
(5) Total debt includes long-term debt and the current maturities of long-term
    debt and excludes contingent obligations.
 
                                      28
<PAGE>
 
   MANAGEMENT'S DISCUSSION AND ANALYSIS OFFINANCIAL CONDITION AND RESULTS OF
                                  OPERATIONS
 
  The following discussion should be read in conjunction with, and is
qualified in its entirety by, "Selected Financial and Other Data" and the
Financial Statements included elsewhere herein.
 
GENERAL
 
  Great Lakes is the largest provider of dredging services in the United
States. Dredging generally involves the enhancement or preservation of
navigability of waterways or the protection of shorelines through the removal
or replenishment of soil, sand or rock. The U.S. dredging market consists of
three primary types of work: Capital, Maintenance (including controlled
disposal dredging) and Beach Nourishment, in which areas the Company has
experienced a combined bid market share in the U.S. of 54% in 1997. In
addition, the Company has grown its role as the only U.S. dredging contractor
with significant international operations, which represented approximately 22%
of its contract revenues in 1997. The Company's fleet of 25 dredges, 29
material transportation barges, two drillboats, and 128 other specialized
support vessels is the largest and most diverse fleet in the U.S., which the
Company believes would cost in excess of $600 million to build.
 
  Most dredging contracts are obtained through competitive bidding on terms
specified by the party inviting the bid. The nature of the specified services
dictates the types of equipment, material and labor involved, all of which
affect the cost of performing the contract and the price that dredging
contractors will bid.
 
  For contracts under its jurisdiction, the Corps typically prepares a cost
estimate based on its understanding of the availability of contractors and
their equipment. To be successful, a bidder must be determined by the Corps to
be a responsible bidder (i.e., a bidder that generally has the necessary
equipment and experience to successfully complete the project) and submit the
lowest responsive bid that does not exceed 125.0% of an estimate determined by
the Corps to be fair and reasonable. With respect to projects that are not
administered by the Corps, contracts are generally awarded to the low
qualified bidder, provided such bid is no greater than the amount of funds
that are available for such project.
 
  Substantially all of the Company's contracts are competitively bid. However,
some government contracts are awarded by a sole source procurement process
through negotiation between the contractor and the government. Prior to
negotiations, the contractor submits a proposal and cost and pricing data to
the government. Under such contracts, the government has the right, after
award and/or completion of the contract, to audit the contractor's books and
records, including the proposal and data available to the contractor during
negotiations, to ensure compliance with the contract and applicable federal
legislation, rules and regulations. The government may seek a price adjustment
based on the results of such audit.
 
  The Company recognizes contract revenues under the percentage-of-completion
method, based on the Company's engineering estimates of the physical
percentage completed of each project. Billings on contracts are generally
submitted after verification with the customers of physical quantities
completed. Costs of contract revenues are adjusted to reflect the gross profit
percentage expected to be achieved upon ultimate completion of each project.
Significant expenditures incurred incidental to major contracts are deferred
and recognized as costs of contracts based on contract performance over the
duration of the related project. These expenditures are reported as prepaid
expenses. Provisions for estimated losses on contracts in progress are made in
the period in which such losses are determined. Claims for additional
compensation due the Company are not recognized in contract revenues until
such claims are settled.
 
  The components of costs of contract revenues are labor, equipment,
subcontracts, rentals, lease expense, other assets employed (including
depreciation, insurance, fuel, maintenance and supplies) and project overhead.
The hourly labor generally is hired on a project basis and laid-off upon the
completion of the project. Costs of contract revenues vary significantly
depending on the type and location of work performed and assets utilized.
 
                                      29
<PAGE>
 
Generally, Capital projects have the lowest costs of contract revenues as a
percent of contract revenues and Beach Nourishment projects have the highest.
 
  The Company's cost structure includes significant fixed costs, averaging
approximately 18.0% of total costs of contracts. The Company can have
significant fluctuations in equipment utilization throughout the year.
Accordingly, for interim reporting, the Company prepays or accrues fixed
equipment costs and amortizes the expenses in proportion to revenues
recognized over the year to better match revenues and expenses. Costs of
contract revenues also includes the net gain or loss on dispositions of
property and equipment. The Company recorded net gains on dispositions of
property and equipment of $1.5 million, $0.5 million, $3.3 million and $0.4
million in 1995, 1996, 1997 and the first six months of 1998, respectively.
 
  The Company's equity in earnings of joint ventures relates to the Company's
50% ownership interest in Amboy and the Company's 14% interest in Riovia S.A.
("Riovia"), the Company's Argentine Joint Venture. The Company's investment in
Riovia was made in 1996. The Company accounts for its investments in each of
Amboy and Riovia under the equity method. The Company conducts certain hopper
dredging activities, primarily Maintenance and Beach Nourishment projects
through the operation of NATCO Limited Partnership ("NATCO") and North
American Trailing Company ("North American"). Minority interests reflects
Ballast Nedam Group N.V.'s respective 25% and 20% interest in NATCO and North
American. See "Business--Joint Ventures."
 
CERTAIN ITEMS AFFECTING RESULTS OF OPERATIONS
 
  The Company believes that its historical results of operations were impacted
by a number of items that are not expected to recur in the ongoing activities
of the Company. The following table sets forth the Company's historical
EBITDA, the impact of these items and Adjusted EBITDA to eliminate the impact
of these items.
 
<TABLE>
<CAPTION>
                                                          SIX MONTHS   TWELVE
                                                             ENDED     MONTHS
                             YEAR ENDED DECEMBER 31,       JUNE 30,    ENDED
                          ------------------------------- ----------- JUNE 30,
                          1993  1994   1995  1996   1997  1997  1998    1998
                                         (DOLLARS IN MILLIONS)
<S>                       <C>   <C>   <C>    <C>    <C>   <C>   <C>   <C>
Operating income (loss).. $16.1 $17.1 $(6.1) $10.8  $11.0  $0.8 $11.2  $21.4
Depreciation and
 amortization............  13.4  14.1   14.7  13.9   13.6   6.9   7.3   14.0
                          ----- ----- ------ -----  ----- ----- -----  -----
EBITDA...................  29.5  31.2    8.6  24.7   24.6   7.7  18.5   35.4
Management fees paid to
 former stockholder......   0.5   0.5          0.5    0.5   0.3   0.3    0.5
Legal and other expenses
 related to the Chicago
 Flood Litigation........   0.8   1.1    1.4   0.6    1.8   1.0          0.8
Letter of credit fees
 associated with the
 Chicago Flood
 Litigation..............   0.2   0.6    0.2
Disposed operations......         0.3    0.2   1.5    1.9   1.1   0.9    1.7
Settlement and other
 costs related to
 subcontract dispute ....                5.6
Other corporate charges..         1.3         (1.1)
                          ----- ----- ------ -----  ----- ----- -----  -----
Adjusted EBITDA.......... $31.0 $35.0 $ 16.0 $26.2  $28.8 $10.1 $19.7  $38.4
                          ===== ===== ====== =====  ===== ===== =====  =====
</TABLE>
 
  Management Fees Paid to Former Stockholder. During the periods presented,
the Company paid a management fee to a former stockholder. The Company does
not intend to pay such a fee subsequent to the Recapitalization.
 
  Legal and Other Expenses Related to the Chicago Flood Litigation. In 1992,
an underwater utility tunnel located beneath the Chicago Loop failed adjacent
to a construction site completed by the Company in the fall of 1991. The
failure resulted in a flooding of the tunnel, and building basements served by
the tunnel. Numerous
 
                                      30
<PAGE>
 
suits were filed against the Company for claims of flood damage and losses due
to business interruption. The Company incurred substantial legal expenses
along with other expenses as a result of the Chicago Flood Litigation. During
1997, all remaining claims were settled relating to the Chicago Flood
Litigation.
 
  Letter of Credit Fees Associated With The Chicago Flood Litigation. In
connection with the Chicago Flood Litigation, the Company incurred additional
expenses related to certain letters of credit as the Company was not able to
obtain such letters of credit under its existing credit facilities. Instead,
the Company obtained such letters of credit from third parties that charged a
higher fee than the Company would have paid for such letters of credit under
its credit facilities.
 
  Disposed Operations. During the periods presented, the Company operated a
marine construction business that was sold in 1996. The adjustments reflect
the elimination of the historical negative EBITDA attributable to this
business.
 
  Settlement and Other Costs related to Subcontract Dispute. The Company
subcontracted a portion of a marine construction project in New Orleans to a
subcontractor. The subcontractor failed to complete its portion of the project
and the Company incurred additional costs to complete the project. The Company
and the subcontractor were subsequently parties to legal proceedings, of which
the settlement in 1995 resulted in $5.6 million of expense recorded by the
Company.
 
  Other Corporate Charges. In 1994, the Company undertook a corporate
reorganization, in which it closed certain of its regional U.S. offices and
incurred a charge of $1.3 million in connection therewith. In 1996, the
Company offered a voluntary early retirement program and incurred a charge of
$0.6 million relating thereto. In 1996, the Company also terminated its
defined benefit pension plan and recognized a net gain of $1.7 million.
 
  "EBITDA," as provided for herein, represents earnings from continuing
operations before interest expense, net, income taxes and depreciation and
amortization expense and excludes equity in earnings of joint ventures and
minority interests. EBITDA is not intended to represent cash flow from
operations as defined by generally accepted accounting principles. The
Company's EBITDA is included in the Prospectus as it is a basis upon which the
Company assesses its financial performance, and certain covenants in the
Company's borrowing arrangements will be tied to similar measures. "Adjusted
EBITDA" excludes the effects of certain items on the Company's historical
EBITDA that are not expected to recur in the ongoing activities of the
Company. Adjusted EBITDA is presented to provide additional information with
respect to the ability of the Company to meet future debt service, capital
expenditures and working capital requirements, but is not necessarily a
measure of the Company's ability to fund its cash needs. EBITDA and Adjusted
EBITDA should not be considered in isolation or as an alternative to net
income, cash flows from continuing operations, or other consolidated income or
cash flow data prepared in accordance with generally accepted accounting
principals as measures of the Company's profitability or liquidity. EBITDA and
Adjusted EBITDA as defined in this Prospectus may differ from similarly titled
measures presented by other companies.
 
COMPONENTS OF CONTRACT REVENUES
 
  The following table sets forth the Company's contract revenues by type of
work performed for the periods indicated:
 
<TABLE>
<CAPTION>
                       FOR THE YEAR ENDED    FOR THE SIX MONTHS ENDED
                          DECEMBER 31,             JUNE 30, 1998
                     ----------------------- -------------------------
                      1995    1996    1997       1997         1998
                                      (IN THOUSANDS)
<S>                  <C>     <C>     <C>     <C>          <C>
Capital............. $58,663 $34,422 $55,563 $     15,364 $     29,399
Maintenance.........  55,347  47,014  74,379       42,706       33,883
Beach...............  29,520  65,838  59,036       25,330       28,248
Foreign.............  53,910  58,166  55,919       17,239       34,152
Other(1)............  29,425  30,431  13,399        7,733        1,335
                     ------- ------- ------- ------------ ------------
</TABLE>
 
                                      31
<PAGE>
 
<TABLE>
<CAPTION>
                      FOR THE YEAR ENDED     FOR THE SIX MONTHS ENDED
                         DECEMBER 31,              JUNE 30, 1998
                  -------------------------- -------------------------
                    1995     1996     1997       1997         1998
                                     (IN THOUSANDS)
<S>               <C>      <C>      <C>      <C>          <C>
  Total.......... $226,865 $235,871 $258,296 $    108,372 $    127,017
                  ======== ======== ======== ============ ============
</TABLE>
- --------
(1) Consists of contract revenues primarily attributable to a marine
    construction business that was sold in 1996.
 
RESULTS OF OPERATIONS
 
  The following table sets forth the components of net income and EBITDA as a
percentage of contract revenues for the periods indicated:
 
<TABLE>
<CAPTION>
                                                                 FOR THE SIX
                                         FOR THE YEAR ENDED     MONTHS ENDED
                                            DECEMBER 31,          JUNE 30,
                                        ----------------------  --------------
                                         1995    1996    1997    1997    1998
<S>                                     <C>     <C>     <C>     <C>     <C>
Contract revenues......................  100.0%  100.0%  100.0%  100.0%  100.0%
Costs of contract revenues.............  (95.7)  (88.5)  (88.4)  (90.9)  (83.4)
                                        ------  ------  ------  ------  ------
  Gross profit.........................    4.3    11.5    11.6     9.1    16.6
General and administrative expenses....   (7.0)   (6.9)   (7.3)   (8.3)   (7.8)
                                        ------  ------  ------  ------  ------
  Operating income (loss)..............   (2.7)    4.6     4.3     0.8     8.8
Interest expense, net..................   (3.5)   (2.6)   (2.3)   (2.6)   (1.7)
Equity in earnings of joint ventures...    0.6     0.5     1.2     0.5     0.3
                                        ------  ------  ------  ------  ------
  Income (loss) before income taxes,
   minority interests and discontinued
   operations..........................   (5.6)    2.5     3.2    (1.3)    7.4
Income tax (expense) benefit...........    1.8    (1.0)   (1.0)    0.8    (2.7)
Minority interests.....................   (0.5)   (0.2)   (0.7)   (1.1)   (1.0)
                                        ------  ------  ------  ------  ------
  Income (loss) from continuing
   operations..........................   (4.3)    1.3     1.5    (1.6)    3.7
Discontinued operations................   (0.1)   (0.5)    0.0     0.0     0.0
                                        ------  ------  ------  ------  ------
  Net income (loss)....................  (4.4)%    0.8%    1.5%  (1.6)%    3.7%
                                        ======  ======  ======  ======  ======
EBITDA.................................    3.8%   10.5%    9.5%    7.1%   14.6%
                                        ======  ======  ======  ======  ======
</TABLE>
 
SIX MONTHS ENDED JUNE 30, 1998 COMPARED TO SIX MONTHS ENDED JUNE 30, 1997
 
  Contract Revenues. Contract revenues increased $18.6 million or 17.2%, from
$108.4 million for the first six months of 1997 to $127.0 million for the
first six months of 1998. The increase was due primarily to a large new
Capital project in Los Angeles that began in the fourth quarter of 1997.
Additionally, foreign project contract revenues increased $16.9 million
between the periods due to projects awarded in the last quarter of 1997 in the
Middle East and Mexico. Maintenance work declined by $8.8 million between the
periods due to normal fluctuations in the number and size of projects awarded
from year to year. Beach Nourishment contract revenues remained consistent
with the prior period.
 
  Costs of Contract Revenues. Costs of contract revenues increased $7.4
million or 7.6%, from $98.5 million for the first six months of 1997 to $105.9
million for the first six months of 1998. The increase was primarily
attributable to increased utilization of assets. As a percentage of contract
revenues, costs of contract revenues was 83.4% in the first six months of 1998
compared to 90.9% in the 1997 period. The improvement in 1998 was attributable
to historically higher margins on two large new Capital projects on the West
Coast of the United States, several Beach Nourishment projects and one foreign
Capital project.
 
 
                                      32
<PAGE>
 
  Gross Profit.  Gross profit increased $11.2 million or 112.8%, from $9.9
million for the first six months of 1997 to $21.1 million for the first six
months of 1998. The increase was primarily attributable to the increased
contract revenues as well as the improved margins experienced in 1998.
 
  General and Administrative Expenses. General and administrative expenses
increased $0.8 million or 9.3%, from $9.1 million for the first six months of
1997 to $9.9 million for the first six months of 1998. The increase was
primarily due to increased headcount associated with increased contract
revenues and higher incentive accruals connected with increased earnings
levels.
 
  Operating Income. Operating income increased $10.4 million from $0.8 million
for the six months of 1997 to $11.2 million for the first six months of 1998.
The increase was primarily attributable to the increased contract revenues as
well as the improved margins experienced in the first six months of 1998.
 
  EBITDA. EBITDA increased $10.8 million or 138.9%, from $7.7 million for the
first six months of 1997 to $18.5 million for the first six months of 1998.
The increase was primarily due to the impact of increased earnings and
improved margins.
 
  Interest Expense, Net. Interest expense, net declined $0.7 million or 24.5%,
from $2.8 million for the first six months of 1997 to $2.1 million for the
first six months of 1998. The increase was primarily attributable to lower
debt levels during the 1998 period.
 
  Equity in Earnings of Joint Ventures. Equity in earnings of joint ventures
declined $0.2 million or 29.6%, from $0.6 million for the first six months of
1997 to $0.4 million for the first six months of 1998. The decrease was
primarily attributable to a temporary reduction in demand for Amboy's products
during the period.
 
  Income Tax Expense (Benefit). Income taxes increased $4.4 million from
$(0.9) million for the first six months of 1997 to $3.5 million for the first
six months of 1998. The increase was primarily due to the impact of increased
earnings.
 
  Minority Interests. Minority interests increased $0.1 million or 12.3%, from
$1.2 million for the first six months of 1997 to $1.3 million for the first
six months of 1998.
 
  Net Income. Net income increased $6.4 million from a loss of $1.7 million
for the first six months of 1997 to net income of $4.7 million for the first
six months of 1998. The increase primarily resulted from the increased
contract revenues and improved profitability levels in certain Capital and
Beach Nourishment projects.
 
 
YEAR ENDED DECEMBER 31, 1997 COMPARED TO YEAR ENDED DECEMBER 31, 1996
 
  Contract Revenues. Contract revenues increased $22.4 million or 9.5%, from
$235.9 million in 1996 to $258.3 million in 1997. The increase was primarily
due to contract revenues from a number of large Capital projects and
additional hopper Maintenance work arising from severe flooding in the
Mississippi river basin, partially offset by a decrease in Beach Nourishment
contract revenues. A $92.0 million Capital project in Los Angeles was awarded
to the Company in the second quarter of 1997, which contributed $13.0 million
to contract revenues in 1997. Additionally, a new Capital project in Newark
Bay contributed $15.9 million to contract revenues in 1997. The decrease in
Beach Nourishment contract revenues was due to normal fluctuations in the
number and size of projects awarded from year to year.
 
  Costs of Contract Revenues. Costs of contract revenues increased $19.7
million or 9.4%, from $208.7 million in 1996 to $228.4 million in 1997. The
increase was primarily due to the increased utilization of fixed assets. The
percent of costs of contract revenues compared to contract revenues remained
constant between 1997 and 1996 at approximately 88.4%.
 
  Gross Profit. Gross profit increased $2.7 million or 10.2%, from $27.2
million in 1996 to $29.9 million in 1997. The increase was due to increased
contract revenues earned in 1997.
 
                                      33
<PAGE>
 
  General and Administrative Expenses. General and administrative expenses
increased $2.5 million or 15.4%, from $16.4 million in 1996 to $18.9 million
in 1997. The increase was primarily due to additional legal and bonus costs in
1997 related to the Chicago Flood Litigation and the favorable impact from the
termination in 1996 of the Company's defined benefit plan for salaried
employees, which was not repeated in 1997.
 
  Operating Income. Operating income of $10.8 million in 1996 and $11.0
million in 1997 remained essentially unchanged from 1996 to 1997.
 
  EBITDA. EBITDA of $24.7 million in 1996 and $24.6 million in 1997 remained
essentially unchanged from 1996 to 1997.
 
  Interest Expense, Net. Interest expense, net remained level from 1996 to
1997, representing $6.0 million in each of 1996 and 1997.
 
  Equity in Earnings of Joint Ventures. Equity in earnings of joint ventures
increased $2.0 million or 175.0%, from $1.1 million in 1996 to $3.1 million in
1997. The increase was primarily due to sales growth at Amboy and the addition
of earnings from the Company's investment in Riovia in 1997.
 
  Income Tax Expense. Income tax expense increased $0.2 million or 14.8%, from
$2.4 million in 1996 to $2.6 million in 1997. The increase was primarily due
to increased earnings but offset partially by lower state tax rates in certain
project locations in 1997. The overall effective tax rates were 39.7% and
32.8% for the 1996 and 1997 period, respectively. The decline in tax rate was
caused principally by variations in taxable earnings allocated to minority
interests.
 
  Minority Interests. Minority interests increased $1.3 million or 297.9%,
from $0.4 million in 1996 to $1.7 million in 1997. The increase was primarily
attributable to the increased hopper maintenance dredging by vessels operated
by NATCO in 1997.
 
  Discontinued Operations. The loss from discontinued operations of $1.1
million related to the sale of a non-core aggregate towing business in 1996.
 
  Net Income. Net income increased $1.8 million or 89.5%, from $2.0 million in
1996 to $3.8 million in 1997. The increase was primarily attributable to
revenue growth, improved results in joint venture equity earnings, a reduction
in losses from discontinued operations and favorable state income tax
variances in certain domestic project locations.
 
YEAR ENDED DECEMBER 31, 1996 COMPARED TO YEAR ENDED DECEMBER 31, 1995
 
  Contract Revenues. Contract revenues increased $9.0 million or 4.0%, from
$226.9 million in 1995 to $235.9 million in 1996. The increase was primarily
due to an increase in Beach Nourishment contract revenues in 1996, partially
offset by reductions in Capital and Maintenance contract revenues. Beach
Nourishment contract revenues increased $36.3 million in 1996 over 1995 due to
increased demand and funding for Beach Nourishment projects. During 1995, the
East Coast of the United States was struck by the most severe hurricane and
tropical storms experienced in over 60 years, which caused certain 1995 Beach
Nourishment projects to be delayed until 1996 and severely eroded numerous
beaches along the East Coast resulting in more Beach Nourishment projects
performed in 1996. The reductions in Capital contract revenues were due
primarily to increased competition from a competitor, which has since ceased
competing with the Company in the Capital dredging business. The reductions in
Maintenance contract revenues were due to normal fluctuations in the number
and size of projects awarded from year to year.
 
  Costs of Contract Revenues. Costs of contract revenues declined $8.4 million
or 3.9%, from $217.1 million in 1995 to $208.7 million in 1996. The percent of
costs of contract revenues compared to contract revenues was 88.5% in 1996 and
95.7% in 1995. The improvement in 1996 over 1995 was primarily due to the
losses incurred in 1995 on certain Beach Nourishment contracts adversely
affected by severe weather conditions.
 
                                      34
<PAGE>
 
  Gross Profit.  Gross profit increased $17.4 million or 177.4%, from $9.8
million in 1995 to $27.2 million in 1996. The increase was primarily
attributable to the increased contract revenues in 1996 and the reduction in
costs associated with Beach Nourishment projects in 1996 as weather conditions
normalized.
 
  General and Administrative Expenses. General and administrative expenses
increased $0.5 million or 3.3%, from $15.9 million in 1995 to $16.4 million in
1996. The increase was primarily due to higher incentive expense connected
with increased earnings levels, partially offset by the favorable impact from
the termination of the Company's defined benefit plan for salaried employees
in 1996.
 
  Operating Income. Operating income increased $16.9 million from a loss of
$6.1 million in 1995 to $10.8 million in 1996. The increase was primarily
attributable to the increased contract revenues in 1996 and the reduction in
costs associated with Beach Nourishment projects in 1996 as weather conditions
normalized.
 
  EBITDA. EBITDA increased $16.1 million or 186.0%, from $8.6 million in 1995
to $24.7 million in 1996. The increase was primarily due to the impact of
increased earnings and improved margins.
 
  Interest Expense, Net. Interest expense, net declined $1.9 million or 23.1%,
from $7.9 million in 1995 to $6.0 million in 1996. The decrease was primarily
due to lower borrowing levels in 1996.
 
 Equity in Earnings of Joint Ventures. Equity in earnings of joint ventures of
$1.3 million in 1995 and $1.1 million in 1996 remained essentially unchanged
from 1995 to 1996.
 
  Income Tax Expense (Benefit). Income taxes increased $6.6 million from a
benefit of $4.2 million in 1995 to an expense of $2.4 million in 1996. The
increase was primarily due to increased earnings. The overall effective tax
rates were 33.0% and 39.7% for the 1995 and 1996 period, respectively. The
increase in tax rate was caused principally by variations in state income
taxes.
 
  Minority Interests. Minority interests decreased $0.8 million or 65.2%, from
$1.2 million in 1995 to $0.4 million in 1996. The decrease was primarily
attributable to lower levels of hopper Maintenance work in 1996 as compared to
1995 due to normal fluctuations in the number and size of projects awarded
from year to year.
 
  Discontinued Operations. The loss from discontinued operations increased
$0.8 million or 237.1%, from $0.3 million in 1995 to $1.1 million in 1996.
Discontinued operations related to the non-core aggregate towing business that
was sold in 1996.
 
  Net Income. Net income increased $12.0 million from a loss of $10.0 million
in 1995 to a profit of $2.0 million in 1996. The increase was primarily due to
improved operating results in Beach Nourishment and hopper Maintenance
projects.
 
BACKLOG
 
  The Company's contracts backlog represents management's estimate of the
revenues which will be realized under the portion of contracts remaining to be
performed based upon estimates relating to, among other things, the time
required to mobilize the necessary assets at the project site, the amount of
material necessary to be dredged and the time necessary to demobilize the
project assets. However, such estimates are necessarily subject to
fluctuations based upon the amount of material which actually must be dredged,
as well as factors affecting the time required to complete the job.
Consequently, backlog is not necessarily indicative of future sales. In
addition, because substantially all of the Company's backlog relates to
government contracts, the Company's order backlog can be canceled at any time
without penalty, except, in some cases, the recovery of the Company's actual
committed costs and profit on work performed up to the date of cancellation.
The Company's backlog does not include contract revenues with respect to
project bids that have been awarded to the Company but for which the Company's
customer has not provided an executed contract. As of June 30, 1998, there
were $5.4
 
                                      35
<PAGE>
 
million of contracts on which the Company was the low bidder, but which had
not yet been awarded to the Company.
 
  As of December 31, 1997, the Company had a backlog of contract revenues of
$155.3 million, which represents an increase of $47.4 million, or 43.9%, over
December 31, 1996 backlog of $107.9 million. The Company had backlog of $178.3
million at June 30, 1998, $115.7 million of which the Company expects to
complete in 1998, although there can be no assurance that all such backlog
will be completed within that period.
 
  The largest component of backlog at December 31, 1997 was $79.8 million
attributable to a large Capital project in Los Angeles. As of June 30, 1998,
$62.6 million relating to this project remained in backlog which included $2.3
million of additional work awarded in the first six months of 1998.
Additionally, backlog at June 30, 1998 includes $34.3 million attributable to
the Boston Harbor Deep Port project that the Company won in the second quarter
of 1998.
 
SEASONALITY
 
  The Company has historically realized lower contract revenues and earnings
in the first and fourth quarters of each year. This trend is due to a number
of factors including variation in weather conditions and government funding
cycles, which affect the timing and execution of projects.
 
LIQUIDITY AND CAPITAL RESOURCES
 
  Cash flows from operations and borrowings under the New Credit Facility are
anticipated to be the Company's primary sources of short-term liquidity. At
the closing of the Transaction, the Company expects to have approximately
$37.9 million of borrowing capacity available under the New Credit Facility.
 
  The Company's net cash flows from operating activities for the six months
ended June 30, 1998 and 1997, were $11.4 million and $(3.3) million,
respectively. The increase in net cash flows from operating activities in 1998
compared to 1997 was due to the increase in earnings in the first six months
of 1998 over the first six months of 1997. The Company's net cash flows from
operating activities for the years ended December 31, 1997, 1996 and 1995,
were $13.6 million, $24.7 million and $(3.7) million, respectively. The
decrease in net cash flow from operating activities in 1997 compared to 1996
was a result of an increase in working capital in the fourth quarter of 1997
due to high revenue levels in the fourth quarter of 1997. Net cash flows
increased in 1996 compared to 1995 due to earnings levels in 1996 compared to
operating losses in 1995.
 
  The Company's net cash flows from investing activities for the six months
ended June 30, 1998 and 1997, were $(5.6) million and $3.4 million,
respectively. The decrease in net cash flows from investing activities in 1998
compared to 1997 was a result of increased capital expenditures and a decrease
in proceeds from dispositions of property and equipment in the first six
months of 1998 as compared to the first six months of 1997. The Company's net
cash flows from investing activities for the years ended December 31, 1997,
1996 and 1995, were $(6.2) million, $(0.8) million and $(3.9) million,
respectively. The decrease in net cash flows from investing activities in 1997
from 1996 was a result of increased capital expenditures in 1997 over 1996.
The increase in net cash flows from investing activities in 1996 from 1995 was
a result of decreased capital expenditures in 1996 from 1995.
 
  The Company's net cash flows from financing activities for the six months
ended June 30, 1998 and 1997, were $(7.0) million and $0.7 million,
respectively. The decrease in net cash flows from financing activities in the
first six months of 1998 compared to the first six months of 1997 was a result
of increased repayments of debt with the additional cash generated from
increased earnings in the first six months of 1998. The Company's net cash
flows from financing activities for the years ended December 31, 1997, 1996
and 1995 were $(7.6) million, $(24.3) million and $6.5 million, respectively.
The increase in net cash flows from financing activities in 1997 compared to
1996 was primarily a result of funding additional capital expenditures and the
increase in working capital requirements. The decrease in net cash flows from
financing activities in 1996 compared to 1995 was a result of the increased
repayments of debt with additional cash generated from increased earnings in
1996.
 
                                      36
<PAGE>
 
  Distributions from both Amboy and Riovia are subject to the unanimous
consent of each partner in such joint venture. The Company received
distributions from joint ventures of $5.5 million, $0.8 million, $1.0 million
and $0.0 million in 1995, 1996, 1997 and the first six months of 1998,
respectively, and recorded earnings from such joint ventures of $1.3 million,
$1.1 million, $3.1 million, and $0.4 million, respectively, for the same
periods. The Company paid dividends of $0.6 million, $0.7 million, $3.0
million and $0.0 million in respect of minority interests in 1995, 1996, 1997
and the first six months of 1998, respectively, and the Company recorded
minority interest expense of $1.2 million, $0.4 million, $1.7 million and $1.3
million, respectively, for the same periods.
 
  The Company has entered into operating lease agreements for certain dredging
assets and office space, which require annual lease payments totaling
approximately $6.0 million annually through 2006. Additionally the Company
expects to incur annual maintenance expense of between $15 and $18 million
annually. Amounts expended for operating leases and maintenance expense are
charged to operations on an annual basis.
 
  Planned capital expenditures, which primarily include support equipment and
equipment upgrades, are expected to require annual spending of between $8
million and $11 million annually for the foreseeable future. The Company's
capital expenditures for 1998 are expected to be $11.0 million for
improvements to its current fleet. In July 1998, the Company entered into an
agreement to acquire two hydraulic dredges, certain support vessels and
operating inventory from a competitor for approximately $14.5 million, for
which the Company expects to finance approximately $10.0 million after the
consummation of the Transaction with an operating lease increasing annual
operating lease expense by approximately $1.1 million. The Company expects
initially to finance the purchase price for such assets with borrowings under
the Revolving Credit Facility. In addition, the Company has contracted to
build a new backhoe dredge, costing approximately $18.0 million, for delivery
in early to mid 1999, which is expected to be financed through an operating
lease increasing annual operating lease expense by approximately $2.0 million.
 
  In connection with the Recapitalization, the Company entered into the New
Credit Facility. The New Credit Facility is secured by first liens on
approximately $55.0 million in market value of dredging equipment and second
liens on approximately an additional $40.0 million in market value of dredging
equipment. Such lien positions restrict the Company's ability to incur
additional indebtedness as a significant portion of its assets are subject to
liens. Additionally, the New Credit Facility restricts the total amount of
indebtedness the Company can incur. The Term Loan under the New Credit
Facility will require quarterly principal payments aggregating $0.0 million,
$2.5 million, $6.5 million, $9.0 million and $11.0 million in 1998, 1999,
2000, 2001 and 2002, respectively. See "Description of the New Credit
Facility."
 
  In connection with the Recapitalization, the Company entered into the New
Bonding Agreement, which provides surety bonds required for bidding and
performing projects. The bonding company's obligation to issue bonds is
discretionary. The Company's obligations under the New Bonding Agreement are
secured by approximately $160 million of vessel and equipment collateral which
the bonding company has either a first lien position or a second lien position
(behind the first liens securing the Company's obligations under the New
Credit Facility). Additionally, the New Bonding Agreement contains restrictive
covenants which, among other things, limit the Company's ability to incur
indebtedness and place liens on its assets. See "Description of New Bonding
Agreement."
 
  In connection with the Recapitalization, the Company sold the Existing
Notes, with an aggregate principal amount of $115.0 million, to the initial
purchaser. The Notes are general unsecured obligations of the Company
subordinated in right of payment to all existing and future senior debt. The
Indenture contains certain covenants that limit, among other things, the
ability of the Company to (i) pay dividends, redeem capital stock or make
certain other restricted payments or investments, (ii) incur additional
indebtedness or issue certain preferred equity interests, (iii) sell all or
substantially all of its assets and (iv) create certain liens on assets. The
Notes bear interest at the rate of 11 1/4% per annum, payable semi-annually on
February 15 and August 15, commencing February 15 1999. The Notes mature on
August 15, 2008. See "Description of Notes."
 
                                      37
<PAGE>
 
  Management believes cash flow from operations and available credit will be
sufficient to finance operations, planned capital expenditures and debt
service requirements for the foreseeable future. The Company's ability to make
scheduled payments of principal of, or to pay the interest or Liquidated
Damages (as defined hereinafter), if any, on, or to refinance, its
indebtedness (including the Notes), or to fund planned capital expenditures
will depend on its future performance, which, to a certain extent, is subject
to general economic, financial, competitive, legislative, regulatory and other
factors that are beyond its control. The Company may, however, need to
refinance all or a portion of the principal of the Notes on or prior to
maturity. There can be no assurance that the Company's business will generate
sufficient cash flow from operations or that future borrowings will be
available under the New Credit Facility in an amount sufficient to enable the
Company to service its indebtedness, including the Notes, or to fund its other
liquidity needs. In addition, there can be no assurance that the Company will
be able to effect any such refinancing on commercially reasonable terms or at
all.
 
YEAR 2000 ISSUE
 
  Historically, many computer programs have been written using two digits
rather than four to define the applicable year, which could result in the
program failing to recognize a year that begins with "20" instead of "19".
This, in turn, could result in major system failures or miscalculations, and
is generally referred to as the "Year 2000 issue".
 
  In June 1996, the Company's MIS Department developed a plan to identify and
address issues related to Year 2000 compliance. The Company's internal systems
were the primary focus of the plan. At that time, the Company compiled an
inventory of its internally developed and third party software. The Company
also evaluated various solutions and techniques for making its internally
developed databases and programs Year 2000 ready. The Company prioritized the
tasks taking into account the likelihood of Year 2000 failure, the impact of
Year 2000 failure on its business, and the effort required to complete the
task. In March 1997, senior management of the Company reviewed the tasks and
approved the plan.
 
  The Company's Year 2000 Plan contemplated four phases--assessment,
implementation, testing and release/installation--which overlap to a degree.
The Company has completed all phases for its most critical systems. The
Company is currently in the implementation, testing and installation phase for
its less critical systems and anticipates completing the final installation
phase during the fourth quarter of 1998. Some non-critical systems will be
addressed during calendar year 1999 and the Company believes such systems are
not material to its operations.
 
  The Company has received information concerning the Year 2000 status of
certain critical suppliers, and anticipates initiating more extensive
inquiries with significant suppliers during the fourth quarter of 1998 to
determine the extent to which the Company is vulnerable to those third
parties' failure to remediate their own Year 2000 issues.
 
  The Company currently estimates that the total cost of implementing its Year
2000 Plan, consisting primarily of increased staffing requirements and outside
consulting services, will not be material. This estimate is based on presently
available information and will be updated as the Company continues its
assessment and proceeds with implementation.
 
  If the Company's computer systems fail with respect to the Year 2000 Issue,
or if any applications or embedded chips critical to the Company's reporting
process are overlooked there could be a material adverse effect on the
business, results of operations or financial condition of the Company.
Additionally, there can be no assurance that the systems of other companies on
which the Company's systems rely will be timely converted, or that a failure
to convert by another company would not have material adverse effect on the
business, results of operations or financial condition of the Company. The
Company has not yet established a contingency plan in this regard, but intends
to formulate one to address unavoided or unavoidable risks and expects to have
the contingency plan formulated by July 1999.
 
                                      38
<PAGE>
 
EFFECTS OF RECENTLY ISSUED ACCOUNTING STANDARDS
 
  In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standard No. 130, "Reporting Comprehensive Income" ("SFAS
130"), and Statement of Financial Accounting Standard No. 131, "Disclosures
about Segments of an Enterprise and Related Information" ("SFAS 131"), which
could require the Company to make additional disclosures in its financial
statements no later than for the year ending December 31, 1998. SFAS 130
defines comprehensive income, which includes items in addition to those
reported in the statement of operations, and requires disclosures about its
components. Management is presently evaluating the effect on the Company's
financial reporting from the adoption of this statement and does not expect it
to have any material effect. SFAS 131 requires disclosures for each segment of
a business and the determination of segments based on the Company's internal
management structure. Management is in the process of evaluating the impact on
the Company's financial reporting from the adoption of this statement.
 
  In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standard No. 133, "Accounting for Derivative Instruments
and Hedging Activities" ("SFAS 133"), which is effective for all fiscal
quarters of all fiscal years beginning after June 15, 1999. SFAS 133 requires
that all derivatives be recognized as either assets or liabilities in the
statement of financial position and be measured at fair value. Management is
in the process of evaluating the impact on the Company's financial position
from adoption of SFAS 133.
 
INFLATION
 
  The Company does not believe that inflation has had a material impact on the
Company's operations.
 
                                      39
<PAGE>
 
                              THE EXCHANGE OFFER
 
PURPOSE AND EFFECT OF THE EXCHANGE OFFER
 
  The Existing Notes were sold by the Company to the Initial Purchaser on
August 19, 1998 (the "Issue Date"). The Initial Purchaser subsequently sold
the Existing Notes to qualified institutional buyers in reliance on Rule 144A
under the Securities Act and to a limited number of institutional "accredited
investors" as defined in Rule 501(a)(1), (2), (3) or (7) under the Securities
Act. Because the Existing Notes are subject to certain transfer restrictions,
as an inducement to the Initial Purchaser the Company, the Subsidiary
Guarantors and the Initial Purchaser entered into the Registration Rights
Agreement, pursuant to which the Company agreed (i) to prepare and file with
the Commission the Registration Statement of which this Prospectus is a part
not later than October 18, 1998 and (ii) to cause the Registration Statement
to become effective under the Securities Act not later than February 15, 1999.
The Registration Statement is intended to satisfy in part the Company's
obligations with respect to the Existing Notes under the Registration Rights
Agreement.
 
  Based on certain interpretive letters issued by the staff of the Commission
to third parties in unrelated transactions, management believes that the
Exchange Notes will be freely transferable by holders other than affiliates of
the Company after the Exchange Offer without further registration under the
Securities Act if the holder of the Exchange Notes represents that it is
acquiring the Exchange Notes in the ordinary course of its business, that it
has no arrangement or understanding with any person to participate in the
distribution of the Exchange Notes and that it is not an affiliate of the
Company, as such terms are interpreted by the Commission; provided, however,
that broker-dealers ("Participating Broker-Dealers") receiving Exchange Notes
in the Exchange Offer will have a prospectus delivery requirement with respect
to resales of such Exchange Notes. In interpretive letters issued to third
parties in unrelated transactions, the Commission has taken the position that
Participating Broker-Dealers may fulfill their prospectus delivery
requirements with respect to exchange notes (other than a resale of an unsold
allotment from the original sale of existing notes) with the prospectus
contained in the registration statement pursuant to which such exchange notes
were registered. Based on those interpretive letters, the Company is of the
view that Participating Broker-Dealers may fulfill their prospectus delivery
requirements with respect to the Exchange Notes with this Prospectus, although
the Commission has expressed no opinion in this regard. Under the Registration
Rights Agreement, the Company is required to allow Participating Broker-
Dealers and other persons, if any, with similar prospectus-delivery
requirements to use this Prospectus in connection with the resale of such
Exchange Notes. Each broker-dealer that receives Exchange Notes for its own
account in exchange for Existing Notes, where such Notes were acquired by such
broker-dealer as a result of market-making activities or other trading
activities, must acknowledge that it will deliver a Prospectus in connection
with any resale of such Exchange Notes. See "Plan of Distribution."
 
TERMS OF THE EXCHANGE OFFER; PERIOD FOR TENDERING EXISTING NOTES
 
  Upon the terms and subject to the conditions set forth in this Prospectus
and in the accompanying Letter of Transmittal (which together constitute the
Exchange Offer), the Company will accept for exchange Existing Notes which are
properly tendered on or prior to the Expiration Date and not withdrawn as
permitted below. As used herein, the term "Expiration Date" means 5:00 p.m.,
New York City time, on           , 1998; provided, however, that if the
Company has extended the period of time for which the Exchange Offer is open,
the term "Expiration Date" means the latest time and date to which the
Exchange Offer is extended.
 
  As of the date of this Prospectus, $115.0 million aggregate principal amount
of the Existing Notes are outstanding. This Prospectus, together with the
Letter of Transmittal, is first being sent on or about           , 1998 to all
holders of Existing Notes known to the Company. The Company's obligation to
accept Existing Notes for exchange pursuant to the Exchange Offer is subject
to certain conditions as set forth under "--Certain Conditions to the Exchange
Offer" below.
 
  The Company expressly reserves the right, at any time or from time to time,
to extend the period of time during which the Exchange Offer is open, and
thereby delay acceptance for any exchange of any Existing Notes,
 
                                      40
<PAGE>
 
by giving notice of such extension to the holders thereof. During any such
extension, all Existing Notes previously tendered will remain subject to the
Exchange Offer and may be accepted for exchange by the Company. Any Existing
Notes not accepted for exchange for any reason will be returned without
expense to the tendering holder thereof as promptly as practicable after the
expiration or termination of the Exchange Offer.
 
  The Company expressly reserves the right to amend or terminate the Exchange
Offer, and not to accept for exchange any Existing Notes not theretofore
accepted for exchange, upon the occurrence of any of the conditions of the
Exchange Offer specified below under "--Certain Conditions to the Exchange
Offer." The Company will give notice of any extension, amendment, non-
acceptance or termination to the holders of the Existing Notes as promptly as
practicable, such notice in the case of any extension to be issued no later
than 9:00 a.m., New York City time, on the next business day after the
previously scheduled Expiration Date.
 
  Holders of Existing Notes do not have any appraisal or dissenters' rights
under the Delaware General Corporation Law in connection with the Exchange
Offer.
 
PROCEDURES FOR TENDERING EXISTING NOTES
 
  The tender to the Company of Existing Notes by a holder thereof as set forth
below and the acceptance thereof by the Company will constitute a binding
agreement between the tendering holder and the Company upon the terms and
subject to the conditions set forth in this Prospectus and in the accompanying
Letter of Transmittal. Except as set forth below, a holder who wishes to
tender Existing Notes for exchange pursuant to the Exchange Offer must
transmit a properly completed and duly executed Letter of Transmittal,
including all other documents required by such Letter of Transmittal, to The
Bank of New York at one of the addresses set forth below under "Exchange
Agent" on or prior to the Expiration Date. In addition, either (i)
certificates for such Existing Notes must be received by the Exchange Agent
along with the Letter of Transmittal, or (ii) a timely confirmation of a book-
entry transfer (a "Book-Entry Confirmation") of such Existing Notes, if such
procedure is available, into the Exchange Agent's account at The Depository
Trust Company (the "Book-Entry Transfer Facility" or the "Depositary")
pursuant to the procedure for book-entry transfer described below, must be
received by the Exchange Agent prior to the Expiration Date, or the holder
must comply with the guaranteed delivery procedure described below.
 
  THE METHOD OF DELIVERY OF EXISTING NOTES, LETTER OF TRANSMITTAL AND ALL
OTHER REQUIRED DOCUMENTS IS AT THE ELECTION AND RISK OF THE HOLDER. IF SUCH
DELIVERY IS BY MAIL, IT IS RECOMMENDED THAT REGISTERED MAIL, PROPERLY INSURED,
WITH RETURN RECEIPT REQUESTED, BE USED. IN ALL CASES, SUFFICIENT TIME SHOULD
BE ALLOWED TO ASSURE TIMELY DELIVERY. NO LETTERS OF TRANSMITTAL OR EXISTING
NOTES SHOULD BE SENT TO THE COMPANY.
 
  Signatures on a Letter of Transmittal or a notice of withdrawal, as the case
may be, must be guaranteed unless the Existing Notes surrendered for exchange
pursuant thereto are tendered (i) by a registered holder of the Existing Notes
who has not completed the box entitled "Special Issuance Instruction" or
"Special Delivery Instruction" on the Letter of Transmittal or (ii) for the
account of an Eligible Institution (as defined below). In the event that
signatures on a Letter of Transmittal or a notice of withdrawal, as the case
maybe, are required to be guaranteed, such guarantees must be by a firm which
is a member of a registered national securities exchange or a member of the
National Association of Securities Dealers, Inc. or by a commercial bank or
trust Company having an office or correspondent in the United States
(collectively, "Eligible Institutions"). If Existing Notes are registered in
the name of a person other than a signer of the Letter of Transmittal, the
Existing Notes surrendered for exchange must be endorsed by, or be accompanied
by a written instrument or instruments of transfer or exchange, in
satisfactory form as determined by the Company in its sole discretion, duly
executed by, the registered holder with the signature thereon guaranteed by an
Eligible Institution.
 
  All questions as to the validity, form, eligibility (including time of
receipt) and acceptance of Existing Notes tendered for exchange will be
determined by the Company in its sole discretion, which determination shall be
 
                                      41
<PAGE>
 
final and binding. The Company reserves the absolute right to reject any and
all tenders of any particular Existing Notes not properly tendered or to not
accept any particular Existing Notes which acceptance might, in the judgment
of the Company or its counsel, be unlawful. The Company also reserves the
absolute right to waive any defects or irregularities or conditions of the
Exchange Offer as to any particular Existing Notes either before or after the
Expiration Date(including the right to waive the ineligibility of any holder
who seeks to tender Existing Notes in the Exchange Offer). The interpretation
of the terms and conditions of the Exchange Offer as to any particular
Existing Notes either before or after the Expiration Date (including the
Letter of Transmittal and the instructions thereto) by the Company shall be
final and binding on all parties. Unless waived, any defects or irregularities
in connection with tenders of Existing Notes for exchange must be cured within
such reasonable period of time as the Company shall determine. Neither the
Company, the Exchange Agent nor any other person shall be under any duty to
give notification of any defect or irregularity with respect to any tender of
Existing Notes for exchange, nor shall any of them incur any liability for
failure to give such notification.
 
  If the Letter of Transmittal or any Existing Notes or powers of attorney are
signed by trustees, executors, administrators, guardians, attorneys-in-fact,
officers of corporations or others acting in a fiduciary or representative
capacity, such persons should so indicate when signing, and, unless waived by
the Company, proper evidence satisfactory to the Company of their authority to
so act must be submitted.
 
  By tendering, each holder of Existing Notes will represent to the Company in
writing that, among other things, the Exchange Notes acquired pursuant to the
Exchange Offer are being obtained in the ordinary course of business of the
holder and any beneficial holder, that neither the holder nor any such
beneficial holder has an arrangement or understanding with any person to
participate in the distribution of such Exchange Notes and that neither the
holder nor any such other person is an "affiliate," as defined under Rule 405
of the Securities Act, of the Company. If the holder is not a broker-dealer,
the holder must represent that it is not engaged in nor does it intend to
engage in a distribution of the Exchange Notes. If the holder is a broker-
dealer, the holder must represent that it will receive Exchange Notes for its
own account in exchange for Existing Notes that were acquired as a result of
market-making activities or other trading activities. Each broker-dealer that
receives Exchange Notes for its own account in exchange for Existing Notes,
where such Existing Notes were acquired by such broker-dealer as a result of
market-making activities or other trading activities (an "Exchanging Dealer"),
must acknowledge that it will deliver a prospectus in connection with any
resale of such Exchange Notes. See "Plan of Distribution."
 
ACCEPTANCE OF EXISTING NOTES FOR EXCHANGE; DELIVERY OF EXCHANGE NOTES
 
  For each Existing Note accepted for exchange, the holder of such Existing
Note will receive an Exchange Note having a principal amount equal to that of
the surrendered Existing Note. For purposes of the Exchange Offer, the Company
shall be deemed to have accepted properly tendered Existing Notes for exchange
when, as and if the Company has given oral and written notice thereof to the
Exchange Agent.
 
  In all cases, issuance of Exchange Notes for Existing Notes that are
accepted for exchange pursuant to the Exchange Offer will be made only after
timely receipt by the Exchange Agent of certificates for such Existing Notes
or a timely Book-Entry Confirmation of such Existing Notes into the Exchange
Agent's account at the Book-Entry Transfer Facility, a properly completed and
duly executed Letter of Transmittal and all other required documents. If any
tendered Existing Notes are not accepted for any reason set forth in the terms
and conditions of the Exchange Offer or if Existing Notes are submitted for a
greater principal amount than the holder desires to exchange, such unaccepted
or non-exchanged Existing Notes will be returned without expense to the
tendering holder thereof(or, in the case of Existing Notes tendered by book-
entry transfer into the Exchange Agent's account at the Book-Entry Transfer
Facility pursuant to the book-entry transfer procedures described below, such
non-exchanged Existing Notes will be credited to an account maintained with
such Book-Entry Transfer Facility) as promptly as practicable after the
expiration of the Exchange Offer.
 
                                      42
<PAGE>
 
BOOK-ENTRY TRANSFER
 
  Any financial institution that is a participant in the Book-Entry Transfer
Facility's systems may make book-entry delivery of Existing Notes by causing
the Book-Entry Transfer Facility to transfer such Existing Notes into the
Exchange Agent's account at the Book-Entry Transfer Facility in accordance
with such Book-Entry Transfer Facility's procedures for transfer. However,
although delivery of Existing Notes may be effected through book-entry
transfer at the Book-Entry Transfer Facility, the Letter of Transmittal or
facsimile thereof with any required signature guarantees and any other
required documents must, in any case, be transmitted to and received by the
Exchange Agent at one of the addresses set forth below under "Exchange Agent"
on or prior to the Expiration Date or the guaranteed delivery procedures
described below must be complied with.
 
  The Company understands that the Exchange Agent has confirmed with the Book-
Entry Transfer Facility that any financial institution that is a participant
in the Book-Entry Transfer Facility's system may utilize the Book-Entry
Transfer Facility's Automated Tender Offer Program ("ATOP") to tender Existing
Notes. The Company further understands that the Exchange Agent will request,
within two business days after the date the Exchange Offer commences, that the
Book-Entry Transfer Facility establish an account with respect to the Existing
Notes for the purpose of facilitating the Exchange Offer, and any participant
may make book-entry delivery of Existing Notes by causing the Book-Entry
Transfer Facility to transfer such Existing Notes into the Exchange Agent's
account in accordance with the Book-Entry Transfer Facility's ATOP procedures
for transfer. However, the exchange of the Existing Notes so tendered will
only be made after timely confirmation (a "Book-Entry Confirmation") of such
book-entry transfer and timely receipt by the Exchange Agent of an Agent's
Message (as defined in the next sentence), an appropriate Letter of
Transmittal with any required signature guarantee, and any other documents
required. The term "Agent's Message" means a message, transmitted by the Book-
Entry Transfer Facility and received by the Exchange Agent and forming part of
Book-Entry Confirmation, which states that the Book-Entry Transfer Facility
has received an express acknowledgment from a participant tendering Existing
Notes which are the subject of such Book-Entry Confirmation and that such
participant has received and agrees to be bound by the terms of the Letter of
Transmittal and that the Company may enforce such agreement against such
participant.
 
GUARANTEED DELIVERY PROCEDURES
 
  If a registered holder of the Existing Notes desires to tender such Existing
Notes and the Existing Notes are not immediately available, or time will not
permit such holder's Existing Notes or other required documents to reach the
Exchange Agent before the Expiration Date, or the procedure for book-entry
transfer cannot be completed on a timely basis, a tender may be effected if
(i) the tender is made through an Eligible Institution, (ii) prior to the
Expiration Date, the Exchange Agent receives from such Eligible Institution a
properly completed and duly executed Letter of Transmittal (or a facsimile
thereof) and Notice of Guaranteed Delivery, substantially in the form provided
by the Company (by telegram, telex, facsimile transmission, mail or hand
delivery), setting forth the name and address of the holder of Existing Notes
and the amount of Existing Notes tendered, stating that the tender is being
made thereby and guaranteeing that within five New York Stock Exchange
("NYSE") trading days after the date of execution of the Notice of Guaranteed
Delivery, the certificates for all physically tendered Existing Notes, in
proper form for transfer, or a Book-Entry Confirmation, as the case may be,
and any other documents required by the Letter of Transmittal will be
deposited by the Eligible Institution with the Exchange Agent and (iii) the
certificates for all physically tendered Existing Notes, in proper form for
transfer, or a Book-Entry Confirmation, as the case may be, and all other
documents required by the Letter of Transmittal are received by the Exchange
Agent within five NYSE trading days after the date of execution of the Notice
of Guaranteed Delivery.
 
WITHDRAWAL RIGHTS
 
  Tenders of Existing Notes may be withdrawn at any time prior to the
Expiration Date. For a withdrawal to be effective, a written notice of
withdrawal must be received by the Exchange Agent at one of the addresses set
forth below under "Exchange Agent." Any such notice of withdrawal must specify
the name of the person
 
                                      43
<PAGE>
 
having tendered the Existing Notes to be withdrawn, identify the Existing
Notes to be withdrawn (including the principal amount of such Existing Notes),
and (where certificates for Existing Notes have been transmitted) specify the
name in which such Existing Notes are registered, if different from that of
the withdrawing holder. If certificates for Existing Notes have been delivered
or otherwise identified to the Exchange Agent, then, prior to the release of
such certificates, the withdrawing holder must also submit the serial numbers
of the particular certificates to be withdrawn and a signed notice of
withdrawal with signatures guaranteed by an Eligible Institution unless such
holder is an Eligible Institution. If Existing Notes have been tendered
pursuant to the procedure for book-entry transfer described above, any notice
of withdrawal must specify the name and number of the account at the Book-
Entry Transfer Facility to be credited with the withdrawn Existing Notes and
otherwise comply with the procedures of such facility. All questions as to the
validity, form and eligibility (including time of receipt) of such notices
will be determined by the Company, whose determination shall be final and
binding on all parties. Any Existing Notes so withdrawn will be deemed not to
have been validly tendered for exchange for purposes of the Exchange Offer.
Any Existing Notes which have been tendered for exchange but which are not
exchanged for any reason will be returned to the holder thereof without cost
to such holder (or in the case of Existing Notes tendered by book-entry
transfer into the Exchange Agent's account at the Book-Entry Transfer Facility
pursuant to the book-entry transfer procedures described above, such Existing
Notes will be credited to an account maintained with such Book-Entry Transfer
Facility for the Existing Notes) as soon as practicable after withdrawal,
rejection of tender or termination of the Exchange Offer. Properly withdrawn
Existing Notes may be retendered by following one of the procedures described
under "--Procedures for Tendering Existing Notes" above at any time on or
prior to the Expiration Date.
 
CERTAIN CONDITIONS TO THE EXCHANGE OFFER
 
  Notwithstanding any other provision of the Exchange Offer, the Company shall
not be required to accept for exchange, or to issue Exchange Notes in exchange
for, any Existing Notes and may terminate or amend the Exchange Offer if at
any time before the acceptance of such Existing Notes for exchange or the
exchange of Exchange Notes for such Existing Notes, the Company determines
that (i) the Exchange Offer does not comply with any applicable law or any
applicable interpretation of the staff of the Commission, (ii) the Company has
not received all applicable governmental approvals or (iii) any actions or
proceedings of any governmental agency or court exist which could materially
impair the Company's ability to consummate the Exchange Offer.
 
  The foregoing conditions are for the sole benefit of the Company and may be
asserted by the Company regardless of the circumstances giving rise to any
such condition or may be waived by the Company in whole or in part at any time
and from time to time in its reasonable discretion. The failure by the Company
at any time to exercise any of the foregoing rights shall not be deemed a
waiver of such right and each such right shall be deemed an ongoing right
which may be asserted at any time and from time to time.
 
  In addition, the Company will not accept for exchange any Existing Notes
tendered, and no Exchange Notes will be issued in exchange for any such
Existing Notes, if at such time any stop order shall be threatened or in
effect with respect to the Registration Statement of which this Prospectus
constitutes a part or the qualification of the Indenture under the Trust
Indenture Act of 1939, as amended (the "Trust Indenture Act"). In any such
event the Company is required to use every reasonable effort to obtain the
withdrawal of any stop order at the earliest possible time.
 
                                      44
<PAGE>
 
EXCHANGE AGENT
 
  The Bank of New York has been appointed as the Exchange Agent for the
Exchange Offer. All executed Letters of Transmittal should be directed to the
Exchange Agent at one of the addresses set forth below. Questions and requests
for assistance, requests for additional copies of this Prospectus or of the
Letter of Transmittal and requests for Notices of Guaranteed Delivery should
be directed to the Exchange Agent addressed as follows:
 
   By Hand Or Overnight    Facsimile Transmissions: By Registered Or Certified
         Delivery:                                             Mail:
                         (Eligible Institutions Only)
 
 
 
   The Bank of New York         (212) 571-3080         The Bank of New York
    101 Barclay Street                                101 Barclay Street, 7E
 
 Corporate Trust Services   To Confirm by Telephone  New York, New York 10286
          Window           or for Information Call:  Attention: Reorganization
       Ground Level                                          Section,
 
 Attention: Reorganization      (212) 815-6333
         Section,
 
  Delivery to an address other than as set forth above or transmission via
facsimile to a number other than as set forth above does not constitute a
valid delivery.
 
FEES AND EXPENSES
 
  The Company will not make any payments to brokers, dealers or others
soliciting acceptances of the Exchange Offer. The principal solicitation is
being made by mail; however, additional solicitations may be made in person or
by telephone by officers and employees of the Company.
 
  The expenses to be incurred in connection with the Exchange Offer will be
paid by the Company. Such expenses include fees and expenses of the Exchange
Agent and Trustee, accounting and legal fees and printing costs, among others.
 
ACCOUNTING TREATMENT
 
  The Exchange Notes will be recorded at the same carrying amount as the
Existing Notes, which is the principal amount as reflected in the Company's
accounting records on the date of the exchange and, accordingly, no gain or
loss will be recognized. The debt issuance costs will be capitalized and
amortized to interest expense over the term of the Exchange Notes.
 
TRANSFER TAXES
 
  Holders who tender their Existing Notes for exchange will not be obligated
to pay any transfer taxes in connection therewith, except that holders who
instruct the Company to register Exchange Notes in the name of, or request
that Existing Notes not tendered or not accepted in the Exchange Offer be
returned to, a person other than the registered tendering holder will be
responsible for the payment of any applicable transfer tax thereon.
 
CONSEQUENCES OF FAILURE TO EXCHANGE; RESALES OF EXCHANGE NOTES
 
  Holders of Existing Notes who do not exchange their Existing Notes for
Exchange Notes pursuant to the Exchange Offer will continue to be subject to
the restrictions on transfer of such Existing Notes as set forth in the legend
thereon as a consequence of the issuance of the Existing Notes pursuant to the
exemptions from, or in transactions not subject to, the registration
requirements of, the Securities Act and applicable state securities laws.
Existing Notes not exchanged pursuant to the Exchange Offer will continue to
accrue interest at 11 1/4% per annum and will otherwise remain outstanding in
accordance with their terms. Holders of Existing Notes do not have any
appraisal or dissenters' rights under the Delaware General Corporation Law in
connection with the Exchange Offer. In general, the Existing Notes may not be
offered or sold unless registered under the Securities
 
                                      45
<PAGE>
 
Act, except pursuant to an exemption from, or in a transaction not subject to,
the Securities Act and applicable state securities laws. The Company does not
currently anticipate that it will register the Existing Notes under the
Securities Act. However, (i) if the Initial Purchaser so requests with respect
to Existing Notes not eligible to be exchanged for Exchange Notes in the
Exchange Offer and held by it following consummation of the Exchange Offer or
(ii) if any holder of Existing Notes(other than an Exchanging Dealer) is not
eligible to participate in the Exchange Offer or, in the case of any holder of
Existing Notes (other than an Exchanging Dealer) that participates in the
Exchange Offer, does not receive Exchange Notes in exchange for Existing Notes
that may be sold without restriction under state and federal securities laws
(other than due solely to the status of such holder as an affiliate of the
Company within the meaning of the Securities Act), the Company is obligated to
file a shelf registration statement on the appropriate form under the
Securities Act relating to the Existing Notes held by such persons.
 
  Based on certain interpretive letters issued by the staff of the Commission
to third parties in unrelated transactions, the Company is of the view that
Exchange Notes issued pursuant to the Exchange Offer may be offered for
resale, resold or otherwise transferred by holders thereof (other than (i) any
such holder which is an "affiliate" of the Company within the meaning of Rule
405 under the Securities Act or (ii) any broker-dealer that purchases Notes
from the Company to resell pursuant to Rule 144A or any other available
exemption) without compliance with the registration and prospectus delivery
provisions of the Securities Act, provided that such Exchange Notes are
acquired in the ordinary course of such holders' business and such holders
have no arrangement or understanding with any person to participate in the
distribution of such Exchange Notes. If any holder has any arrangement or
understanding with respect to the distribution of the Exchange Notes to be
acquired pursuant to the Exchange Offer, such holder (i) could not rely on the
applicable interpretations of the staff of the Commission and (ii) must comply
with the registration and prospectus delivery requirements of the Securities
Act in connection with a secondary resale transaction. A broker-dealer who
holds Existing Notes that were acquired for its own account as a result of
market-making or other trading activities may be deemed to be an "underwriter"
within the meaning of the Securities Act and must, therefore, deliver a
prospectus meeting the requirements of the Securities Act in connection with
any resale of Exchange Notes. Each such broker-dealer that receives Exchange
Notes for its own account in exchange for Existing Notes, where such Existing
Notes were acquired by such broker-dealer as a result of market-making
activities or other trading activities, must acknowledge in the Letter of
Transmittal that it will deliver a prospectus in connection with any resale of
such Exchange Notes. See "Plan of Distribution." The Company has not requested
the staff of the Commission to consider the Exchange Offer in the context of a
no-action letter, and there can be no assurance that the staff would take
positions similar to those taken in the interpretive letters referred to above
if the Company were to make such a no-action request.
 
  In addition, to comply with the securities laws of certain jurisdictions, if
applicable, the Exchange Notes may not be offered or sold unless they have
been registered or qualified for sale in such jurisdictions or an exemption
from registration or qualification is available and is complied with. The
Company has agreed, pursuant to the Registration Rights Agreement and subject
to certain specified limitations therein, to register or qualify the Exchange
Notes for offer or sale under the securities or blue sky laws of such
jurisdictions in the United States as any selling holder of the Notes
reasonably requests in writing.
 
                                      46
<PAGE>
 
                                   BUSINESS
 
  Great Lakes is the largest provider of dredging services in the United
States. Dredging generally involves the enhancement or preservation of
navigability of waterways or the protection of shorelines through the removal
or replenishment of soil, sand or rock. The U.S. dredging market consists of
three primary types of work: Capital, Maintenance (including controlled
disposal dredging) and Beach Nourishment, in which activities the Company
achieved a combined bid market share in the U.S. of 54% in 1997. In addition,
the Company is the only U.S. dredging contractor with significant
international operations, which represented approximately 22% of its contract
revenues in 1997. The Company's fleet of 25 dredges, 29 material
transportation barges, two drillboats, and 128 other specialized support
vessels is the largest and most diverse fleet in the U.S. The Company believes
its fleet would cost in excess of $600 million to build. For the twelve months
ended June 30, 1998, the Company's contract revenues and Adjusted EBITDA, were
$276.9 million and $38.4 million, respectively. In addition, as of June 30,
1998, the Company's contract backlog totaled approximately $178 million.
 
  Over its 108-year life, the Company has grown to be the leader in each of
its business activities in the U.S. The Company's three principal business
activities are:
 
  .  CAPITAL (approximately 43% of 1997 contract revenues). Capital dredging
     projects are primarily port expansion projects, which involve the
     deepening of channels to allow larger, deeper draft ships and providing
     land fill for building additional port facilities, thereby enhancing
     port profitability and competitiveness. Approximately 31% of the
     Company's Capital project revenues in 1997 derive from Deep Port
     projects. The Company's cumulative bid market share of Deep Port
     projects was 76% from 1991 to 1997. Capital projects also include land
     reclamations, trench digging, and other construction-related dredging.
     The Company's bid market share of total U.S. Capital projects (including
     Deep Port projects) was 67% in 1997. Approximately 22% of the Company's
     contract revenues were attributable to non-U.S. Capital projects.
 
  .  MAINTENANCE (approximately 29% of 1997 contract revenues). Maintenance
     dredging consists of the redredging of waterways and harbors to remove
     silt, sand and other accumulated sediments. Due to natural
     sedimentation, active channels generally require Maintenance dredging
     every one to three years, thus creating a continuous source of dredging
     work that is typically non-deferable if optimal navigability is to be
     maintained. The Company's bid market share of U.S. Maintenance projects
     was 28% in 1997.
 
  .  BEACH NOURISHMENT (approximately 23% of 1997 contract revenues). Beach
     Nourishment dredging projects generally involve moving sand from the
     ocean floor to shoreline locations when erosion has progressed to a
     stage that threatens substantial shoreline assets. The Company's bid
     market share of U.S. Beach Nourishment projects was 86% in 1997.
 
  The Company believes that it benefits from a number of favorable trends in
the U.S. dredging market. The average controlling depth of the top ten largest
U.S. ports, as measured by annual container volume, is 40.4 feet compared to
52.7 feet for the top ten non-U.S. ports worldwide. Without significant
deepening efforts, most major U.S. ports risk being unable to accommodate
larger cargo vessels, which renders them less competitive with deeper ports.
The Corps, which has the primary responsibility for maintaining and improving
the nation's waterways, ports and shorelines, has recently announced 18 new
Deep Port projects to be completed over the next seven years, which the Corps
estimates will have an aggregate value in excess of $2.2 billion. Funding for
announced projects has also increased significantly during the past 12 months
due to increased federal funding and increased cost sharing of Capital
projects by local governments. In addition, the Corps, which historically has
performed a significant amount of domestic Maintenance dredging projects, has
substantially reduced its fleet from its height of 42 dredges in 1976 to 12
dredges in 1998, and has recently idled the largest of its four remaining
hopper dredges, which are the only Corps dredges that compete with the
Company.
 
 
                                      47
<PAGE>
 
COMPETITIVE STRENGTHS
 
  The Company possesses a number of competitive strengths that have allowed it
to develop and maintain its leading position within the dredging industry,
including the following:
 
  FLEXIBLE PORTFOLIO OF ASSETS. The Company operates the largest and most
diverse dredging fleet in the U.S., which the Company believes would cost in
excess of $600 million to build. Great Lakes owns over 180 vessels including
approximately 40% of the vessels certified by the U.S. Coast Guard and
American Bureau of Shipping to perform offshore dredging operations, 47% of
available hopper dredge capacity, 33% of large capacity clamshell dredges
operating in the U.S., 100% of the drill boats in the U.S. and certain
specialized equipment, such as the only two large electric dredges in the U.S.
The size and breadth of the fleet improves the Company's competitiveness as it
generally permits the Company to select the most efficient equipment for a
particular job. To maintain the value and effectiveness of its fleet, the
Company emphasizes proactive maintenance that results in lower downtime,
increased profitability, enhanced vessel life and relatively low capital
expenditure requirements. To this end, the Company incurred $17.3 million of
maintenance expense in 1997 in addition to capital expenditures of $11.5
million.
 
  FAVORABLE COMPETITIVE DYNAMIC. Great Lakes is the largest U.S. provider of
dredging services and has consistently maintained a cumulative bid market
share of 38% since 1991, which is substantially greater than its nearest
competitor's share for those projects. In addition to operating and owning the
industry's largest and most diverse fleet, the Company believes that it
benefits from a number of significant advantages relative to both existing and
potential competitors, including: (i) the requirements of the Dredging Act of
1906 and the Jones Act of 1920, which effectively prohibit foreign dredges and
foreign-owned dredging companies from competing in the U.S.; (ii) its being
one of three competitors that it believes are independently able to obtain
performance bonds in an amount greater than $50 million; (iii) the relatively
high capital costs associated with the construction of a new dredge, which the
Company estimates at between $10 to $50 million; and (iv) the Company's
reputation for quality and customer service built up over its 108 year
operating history, during which time it has never failed to complete a
project. In addition, the Company's long history as a leader in the industry
has enabled it to develop a proprietary database that contains detailed
bidding and technical information on most domestic dredging projects since
1970, which management believes allows the Company, among other things, to be
more accurate than its competitors in predicting contract costs prior to
bidding.
 
  SPECIALIZED CAPABILITY IN CAPITAL PROJECTS. Great Lakes believes it is the
leader in Capital dredging projects which generally require specialized
engineering expertise, specific combinations of equipment and experience in
performing complex projects. From 1991 to 1997, Great Lakes achieved a 38%
U.S. bid market share of the Capital projects. The Corps has recently
announced 18 new Deep Port projects to be completed through 2005. The Corps
has estimated the aggregate dollar value of these projects to exceed $2.2
billion (of which bidding for approximately $1 billion of such projects is
scheduled to commence in 1998) compared to $887 million of projects bid
between 1986 and 1997. The Company's cumulative bid market share of Deep Port
projects was 76% from 1991 to 1997. The Company believes its extensive
experience on complex projects significantly enhances its ability to
profitably bid and complete these contracts.
 
  PROVEN, EXPERIENCED MANAGEMENT TEAM. The Company's senior managers include:
Douglas B. Mackie, President and Chief Executive Officer; Richard M. Lowry,
Executive Vice President and Chief Operating Officer; and Bruce J. Biemeck,
Senior Vice President and Chief Financial Officer, who have an average of 17
years of experience in the dredging industry. The Company believes that its
experienced management team provides it with a significant advantage over its
competitors, many of whom are family owned and managed. As a result of the
Transaction, the management of the Company owns approximately 16% of the
issued and outstanding common stock of Great Lakes.
 
BUSINESS STRATEGY
 
  The Company's strategy is to continue to grow contract revenues and cash
flow and strengthen its competitive position worldwide. The principal elements
of this strategy include:
 
                                      48
<PAGE>
 
  CONTINUE TO GROW IN DOMESTIC MARKETS. The Company expects to strengthen its
domestic leadership position by leveraging (i) the size and breadth of its
fleet, (ii) its industry-leading operating experience, (iii) its engineering
expertise, and (iv) its efficient project management practices. For example,
the Company has contracted to build a new backhoe at a cost of approximately
$18 million, which will enhance its ability to compete for and execute new
Deep Port projects. To further enhance the Company's operating capabilities,
on July 27, 1998, the Company entered into an agreement with T.L. James &
Company, Inc., a significant competitor, to acquire, at a cost of
approximately $14.5 million, a large hydraulic dredge and midsize hydraulic
dredge together with support equipment, inventory and spare parts. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations--Liquidity and Capital Resources."
 
  GROW ESTABLISHED FOREIGN MARKET BASE. Since the early 1990s, a consolidation
among certain foreign competitors, together with an increase in foreign
governments' port infrastructure investments, have resulted in new overseas
dredging opportunities for Great Lakes. In 1997, the Company recorded
approximately $55.9 million in revenue from non-U.S. dredging projects. The
Company intends to continue to selectively pursue international opportunities
that offer it the potential to increase the utilization of its asset base, to
leverage its project management capabilities and to expand its non-U.S.
dredging market share.
 
  EXPLOIT GROWTH IN CONTROLLED DISPOSAL DREDGING. In recent years, in response
to more stringent regulations governing the disposal of dredged materials,
certain of the Company's projects have required dredged materials to be
disposed of in a more controlled manner. The Company believes it is well
positioned to exploit this trend due to its equipment mix, its operating
expertise and its joint venture with the owner and operator of two fully
permitted upland disposal sites in New Jersey, which represent a substantial
percentage of the upland disposal capacity in the greater New York City area.
During 1997, Great Lakes completed $12.0 million of controlled disposal
dredging projects. The Company has estimated that over $100 million of
dredging revenue related to projects requiring upland disposal is expected to
be completed through 2005 in New York and New Jersey.
 
OPERATIONS
 
  U.S. Capital Dredging. Capital dredging projects are primarily from
expansion projects, which involve the deepening of channels to allow larger,
deeper draft ships and providing land fill for building additional port
facilities, thereby enhancing port profitability and competitiveness. The
Company's cumulative bid market share of Deep Port projects was 76% from 1991
to 1997. Capital projects also include other land reclamations, trench
digging, and other construction-related dredging.
 
                                      49
<PAGE>
 
  U.S. Capital includes Deep Port projects authorized under the 1986 Water
Resource Development Act, as amended and supplemented ("WORDA"). In 1986,
WORDA authorized the deepening of 39 ports and subsequently authorized
additional port deepening projects and modifications to previously authorized
projects. As of the date of this Offering Memorandum, port deepening projects
have commenced or been completed in Norfolk, VA, Baltimore, MD, Mobile, AL,
New York, NY, Miami, FL, Oakland, CA, Los Angeles, CA and Long Beach, CA. The
budgeted cost of all federally authorized Deep Port projects is expected to be
in excess of approximately $3.0 billion. Great Lakes has had a bid market
share of 65.4% on the $887.0 of Deep Port projects awarded since WORDA was
enacted in 1986. Increasing competition among ports has resulted in added
pressure on the Corps and Congress to schedule projects previously approved
but not yet put out for bid. Additionally, funding for announced projects has
also increased significantly during the past 12 months due to (i) increased
federal funding, and (ii) increased cost sharing of Capital projects by local
governments. As a result, the Corps has announced over $2.2 billion of Capital
projects to be let for bid and executed over the next seven years, of which
the bidding for approximately $1.0 billion of such projects is scheduled to
commence in 1998. The table below lists the Deep Port projects, estimated size
and expected time frame for construction identified by the Corps for bid
through 2005. See "Risk Factors--Dependence on Government Contracts and
Funding."
 
                    DEEP PORT PROJECTS PLANNED THROUGH 2005
 
<TABLE>
<CAPTION>
                                                  ESTIMATED
                                                     SIZE    EXPECTED TIME FRAME
                                                  (MILLIONS)  FOR CONSTRUCTION
<S>                                               <C>        <C>
Arthur Kill/Kill Van Kull, NY....................   $  750        1999-2005
Houston Ship Channel, TX.........................      250        1998-2004
Cape Fear River, NC..............................      248        2000-2003
Delaware River, PA...............................      236        2000-2003
Oakland, CA......................................      124        2001-2004
Charleston Harbor, SC............................      117        1999-2002
Columbia River, OR...............................      100        2002-2003
San Diego Harbor, CA.............................       87        2001-2003
Baltimore Harbor, MD.............................       63        2002-2004
Savannah, GA.....................................       60        2000-2001
San Juan Harbor, Puerto Rico.....................       50        1998-2000
Los Angeles/Long Beach, CA.......................       45        1998-1999
Brunswick, GA....................................       40        1999-2001
Jacksonville Harbor, FL..........................       40        2000-2002
Humbolt Harbor, CA...............................       15        1998-1999
                                                    ------
    Total........................................   $2,255
                                                    ======
</TABLE>
 
  Capital dredging involves a higher level of complexity and the use of
specialized equipment. These requirements limit the number of competitors
qualified to perform this type of work. The Company's experience, expertise
and extensive and diverse equipment fleet make Great Lakes the leading
provider of dredging services with a significant cumulative bid market share
of all Capital projects, approximately 38% over the last seven years.
 
  Maintenance. Maintenance dredging consists of the redredging of waterways
and harbors to remove silt, sand, and other accumulated sediments. Channels
are typically redredged to depths established prior to recent sedimentation.
Due to natural sedimentation, active channels generally require Maintenance
dredging every one to three years, thus creating a continuous source of
dredging work that is typically non-deferrable if optimal navigability is to
be maintained. The frequency of Maintenance dredging requirements is often
accelerated by snowfall or heavy rainfall in the midwest which causes
additional siltation in the Mississippi River and its tributaries.
 
                                      50
<PAGE>
 
  The majority of Maintenance dredging work is contracted by the Corps. Other
entities which contract Maintenance dredging include state and local
governments, port authorities, private enterprises, and foreign entities.
Equipment utilized in Maintenance work varies with the specifications of the
project.
 
  The Corps' Maintenance dredging program has grown since 1990 due to both
additional ongoing dredging required in channels deepened under the WORDA
legislation and the execution by the private sector of work previously done by
the Corps. In 1994, the Corps reduced the level of utilization of its hopper
dredging fleet by 20.0% and awarded this additional work to the private
sector. In addition, pursuant to federal legislation enacted in late 1997, the
Corps idled the largest of its four hopper dredges, which are the only Corps
dredges that compete with the Company. The legislation provides that if the
private sector's performance is satisfactory, the idled Corps dredge will be
permanently idled, which will provide the private sector with additional
business opportunities.
 
  The Company believes that the maintenance market will be favorably impacted
by a number of factors, including but not limited to: (i) increasing demands
by the shipping industry to maintain ports more frequently to ensure proper
depths for increasingly larger deeper draft ships, and (ii) additional
maintenance required upon the completion of Capital-related projects, as
deeper channels tend to accumulate sediment more rapidly.
 
  In recent years, in response to more stringent regulations governing the
disposal of dredged materials, certain of the Company's projects have required
dredged materials to be disposed of in a more controlled manner. The Company
believes it is well positioned to exploit this trend due to its equipment mix,
its operating expertise and its joint venture with the owner and operator of
two fully permitted upland disposal sites in New Jersey, which represent a
substantial percentage of the upland disposal capacity in the greater New York
City area. During 1997, Great Lakes completed $12.0 million of controlled
disposal dredging projects. The Corps has estimated that over $100.0 million
of dredging revenue related to projects requiring upland disposal is expected
to be completed through 2005 in New York and New Jersey.
 
  Beach Nourishment. Beach Nourishment dredging projects generally involve
moving sand from the ocean floor to shoreline locations and typically arise
when beach erosion has progressed to a stage that threatens substantial
shoreline assets. Beach Nourishment achieves a more esthetic result than
trapping sand through the use of sea walls and jetties, and a more economic
response to relocating buildings and other assets from the shoreline. Primary
customers for Beach Nourishment jobs are federal, state and local agencies and
municipalities.
 
  Beach Nourishment projects have become in recent years a more important
component of the dredging industry. The increased commercial development of
U.S. shorelines, combined with their continual erosion, has created potential
replenishment opportunities on hundreds of miles of coastline, particularly on
the East Coast. The offshore areas from which replacement sand is dredged,
known as borrow areas, are increasingly located further from the beach, which
(i) requires in certain cases the use of ocean-certified dredges, of which the
Company has the largest U.S. fleet, and (ii) limits the ability to directly
pump the sand. This benefits the Company because it has the largest fleet of
ocean-certified vessels which are capable of performing this activity.
 
  During the period from 1960 through 1985, a substantial amount of beach
rebuilding was performed. However, there was an inadequate amount of follow-up
maintenance performed subsequent to 1985. Since 1996, the Beach Nourishment
market has improved due to (i) an increased amount of follow-up work and (ii)
the recent increase in the severity of the storm and hurricane activity along
the eastern seaboard.
 
  Foreign Dredging Operations. Since 1993, the Company has established itself
as a capable and competitive provider of international dredging services for
Capital projects. Great Lakes has built strong relationships with certain
foreign customers due to its willingness to redesign projects, its ethical
business practices and the desire of certain foreign governments to conduct
business with U.S. firms. Great Lakes is now routinely invited to bid on
projects in certain foreign markets and as a result has been successful in
increasing its foreign business. Since 1993, the Company has worked in Europe,
the Middle East, Africa, Mexico and South America. In 1997, 22% of the
Company's contract revenues were derived from international dredging projects.
 
                                      51
<PAGE>
 
JOINT VENTURES
 
  Amboy. The Company and a New Jersey aggregates company each own 50% of
Amboy. Amboy was formed in December 1984 to mine sand from the entrance
channel to the New York harbor and to process, transport, and market fine
aggregate, which is used principally as an ingredient in ready-mix concrete
and asphalt. Great Lakes' dredging expertise and its partner's knowledge of
the aggregate market formed the basis for the joint venture. Amboy is
accounted for by the Company under the equity method. See "Management's
Discussion and Analysis of Financial Conditions and Results of Operations."
 
  Amboy is the only East coast aggregate producer to mine sand from the ocean
floor. In 1988 Amboy built a specially designed dredge at a cost of $9.0
million for sand mining, de-watering and dry delivery. No other vessel of this
type operates in the U.S. Amboy's ocean-based supply of sand provides a long-
term competitive advantage in the Northeast as land-based sand deposits are
depleted or rendered less cost competitive by escalating land values.
 
  Mining operations are performed pursuant to permits granted to Amboy by the
federal government and the states of New York and New Jersey. Amboy is in the
process of obtaining permits to mine sand in new borrow areas which contain
aggregate more closely meeting the specifications for concrete sand. These new
sources will require less blending of material with the dredged aggregate,
reducing the cost of the final product and improving margins. The Company
believes that these permits are likely to be obtained in the next 18 months.
However, there can be no assurance that such permits will be obtained.
 
  Argentine Joint Venture. In 1996, Great Lakes acquired a 14% interest in
Riovia, a joint venture with four leading European dredging firms and two
Argentine dredging firms to dredge the long neglected Rio Via channel linking
Buenos Aires, Argentina and Montevideo, Uruguay which is important for
shipping to Argentina and Uruguay. This venture has afforded Great Lakes the
opportunity to work with other international dredging companies to design,
manage and execute this project.
 
CUSTOMERS
 
  More than 400 ports and 25,000 miles of navigation channels are dredged
throughout the U.S. in order to keep ship traffic operating efficiently. The
dredging industry's customers include federal, state, and local governments,
foreign governments, and both domestic and foreign private concerns such as
utilities and oil companies. Most dredging projects are competitively bid,
with the award going to the lowest bonded bidder. There are generally few
economic substitutes that customers can use for dredging services. Foreign
governments are the primary dredging customers in international markets,
generally for capital projects relating to infrastructure development. See
"Risk Factors--Dependence on Government Contracts and Funding."
 
  The Corps is the largest dredging customer in the U.S. and has
responsibility for federally funded projects related to navigation and flood
control. In addition, the United States Coast Guard and the United States Navy
are responsible for awarding federal contracts with respect to their own
facilities. Until the early 1970's, the Corps used its own fleet to execute
nearly all of its authorized maintenance dredging. In 1973, Congress imposed a
moratorium on upgrading the Corps' dredging fleet in response to industry
pressure which challenged the efficiency of the Corps' operation. Legislation
was ultimately passed by Congress in 1978 limiting the Corps' fleet of dredges
to a size and configuration considered necessary only for emergencies and
national defense. As a result, its fleet was reduced from 42 dredges in 1976
to 12 dredges in 1998. Currently, only the Corps' four hopper dredges compete
directly with the Company. Furthermore, the Corps recently idled the largest
of its four remaining hopper dredges for a two-year test program. The Corps is
currently conducting a study on alternatives to operating its remaining fleet,
but the Corps is prohibited from selling any of its fleet for use in the U.S.
 
BIDDING PROCESS
 
  Most dredging contracts are obtained through competitive bidding on terms
specified by the party inviting the bid. The nature of the specified services
dictates the types of equipment, material and labor involved, all of which
affect the cost of performing the contract and the price that dredging
contractors will bid.
 
                                      52
<PAGE>
 
  For contracts under its jurisdiction, the Corps typically prepares a cost
estimate based on its understanding of the availability of contractors and
their equipment. To be successful, a bidder must be determined by the Corps to
be a responsible bidder (i.e., a bidder that generally has the necessary
equipment and experience to successfully complete the project) and submit the
lowest responsive bid that does not exceed 125% of an estimate determined by
the Corps to be fair and reasonable. With respect to projects that are not
administered by the Corps, contracts are generally awarded to the lowest
qualified bidder, provided such bid is no greater than the amount of funds
that are available for such project.
 
  Substantially all of the Company's contracts are competitively bid. However,
some government contracts are awarded by a sole source procurement process
through negotiation between the contractor and the government. Prior to
negotiations, the contractor submits a proposal and cost and pricing data to
the government. Under such contracts, the government has the right, after
award and/or completion of the contract, to audit the contractor's books and
records, including the proposal and data available to the contractor during
negotiations, to ensure compliance with the contract and applicable federal
legislation, rules and regulations. The government may seek a price adjustment
based on the results of such audit.
 
  Great Lakes has operated for over 100 years and maintains an extensive
historical database of dredging production records from its own and its
competitors' activities and past bidding results. Prior production records
help the Company predict sediment composition and optimum equipment
requirements. Management believes that its extensive database and its
accumulated estimating and bidding expertise allow the Company to be more
accurate than its competitors in predicting dredging cost, prior to bidding
for contracts.
 
BONDING AND FOREIGN PROJECTS GUARANTEES
 
  For most domestic projects and some foreign projects, dredging service
providers are required to obtain three types of bonds, which are typically
provided by large insurance companies. A bid bond is required to serve as a
guarantee that if a service provider's bid is chosen, the service provider
will sign the contract. The amount of the bond is typically 20% of the service
provider's bid, up to a maximum bond of $3.0 million. After a contract is
signed, the bid bond is replaced by a performance bond, the purpose of which
is to guarantee that the job will be completed. A performance bond typically
covers 100% of the contract value with no maximum bond amounts. If the service
provider fails to complete a job, the bonding company assumes such obligation
and pays to complete the job, generally by using the equipment of the
defaulting company. A company's ability to obtain performance bonds with
respect to a particular contract depends upon the size of the contract, as
well as the size of the service provider and its financial position. A payment
bond is also required to protect the service provider's suppliers and
subcontractors in the event that the service provider cannot make timely
payments. Payment bonds are generally written in amounts ranging from 40% to
50% of the contract value, up to a maximum of $2.5 million.
 
  Great Lakes has never failed to complete a project during its 108 year
history, and therefore a performance bond has never been called. This reflects
(i) the fact that the range of work performed by Great Lakes is limited and
often repetitive; (ii) the relatively short duration of most projects and
(iii) Great Lakes' broad experience in most U.S. harbors.
 
  The Company's projects have been bonded by Reliance Surety Company
("Reliance") since 1985, with whom it believes it has a good relationship. The
Company has not experienced difficulty in obtaining bonding from Reliance for
any of its projects. If the Company were to fail to complete a project, the
bond provider would be required to either (i) permit the customer to complete
the job and reimburse the customer for the cost of completion or (ii) complete
the defaulted contract utilizing the Company's equipment and labor force or a
third party service provider. In the event the bonding company were to
complete the defaulted contract, it would be entitled to be paid the contract
price directly by the customer. However, the bonding company would be entitled
to be paid by the Company an amount equal to the difference, if any, between
the contract price and the cost of completing the project plus a profit margin
thereon.
 
  For most foreign projects, letters of credit or bank guarantees issued by
foreign banks, which are secured by letter of credit issued under the Credit
Agreement, are required as security for the bid, performance and, if
 
                                      53
<PAGE>
 
applicable, advance payments. Foreign bid guarantees are usually 2% to 5% of
the service provider's bid. Foreign performance and advance payment guarantees
are each typically 5% to 10% of the contract value.
 
COMPETITIVE ENVIRONMENT
 
  The U.S. dredging industry is highly fragmented but has experienced
significant consolidation in recent years. Approximately 180 entities in the
U.S. presently operate more than 600 dredges, most of which are smaller, serve
the inland, as opposed to coastal, waterways and therefore do not compete with
Great Lakes.
 
  Competition in the Company's markets is based mainly on the basis of price,
and competition is often limited by the size of the job, equipment
requirements, bonding requirements, certification requirements, or government
regulations. Currently, Great Lakes and two competitors are the only dredging
companies which independently bid on jobs with values in excess of $50.0
million.
 
  Most dredging competitors concentrate their efforts in certain regions and
operate only one type of dredge. The Company believes the concentration is
usually the result of (i) a limited capital base from which to expand
operations, (ii) familiarity with the local markets and (iii) expertise with a
particular type of equipment. Regional concentrations do not allow these
competitors to respond to opportunities in other regions or to diversify their
risks in the event of a temporary decline in the market in their area. A
company with a variety of equipment, such as Great Lakes, is better able to
respond to changes in demand for certain types of dredges and can select the
most suitable equipment for any particular project, minimizing its project
completion cost. Additionally, Great Lakes, with its extensive fleet and
engineering expertise, can readily meet applicable certification, government
and bonding requirements.
 
EQUIPMENT OVERVIEW
 
  Great Lakes' dredging fleet is the largest in the western hemisphere and one
of the largest fleets in the world. The fleet consists of over 180 pieces of
equipment, including the largest hopper, and most of the large hydraulic
dredges in the U.S.
 
  The following table provides a listing of the Company's fleet of equipment.
 
                            FLEET OF EQUIPMENT (1)
 
<TABLE>
<CAPTION>
TYPE OF EQUIPMENT                                                       QUANTITY
<S>                                                                     <C>
Hydraulic Dredges......................................................    10
Hopper Dredges.........................................................     8
Clamshell Dredges......................................................     7
Unloaders..............................................................     2
Drill Boats............................................................     2
Dump Barges............................................................    20
Hopper Barges..........................................................     9
Deck Barges............................................................    32
Other Barges...........................................................    23
Booster Pumps..........................................................     6
Tugs...................................................................    10
Launches...............................................................    19
Derricks...............................................................     6
Cranes.................................................................     7
Loaders/Dozers.........................................................    10
Survey Boats...........................................................    13
                                                                          ---
  Total................................................................   184
                                                                          ===
</TABLE>
- --------
(1) In addition, the Company has entered into an agreement to purchase two
    hydraulic dredges and support vessels and is building a backhoe dredge.
 
                                      54
<PAGE>
 
  Along with being among the largest and most versatile in the U.S., five of
Great Lakes' hoppers are split-hulled (to facilitate dumping) and self
propelled. In addition, the Company operates the only two large electric
dredges in the U.S., which makes Great Lakes particularly competitive in
markets with stringent emissions standards (such as southern California). The
Company also has the largest fleet of material transportation barges in the
industry which provide cost advantages when dredged material is required to be
disposed of far offshore or when transporting material requiring controlled
disposal.
 
  The Company is committed to preventive maintenance, which it believes is
reflected in the long life of most of its equipment and its low level downtime
on jobs. The Company spent $17.3 million on maintenance in 1997, in addition
to approximately $11.5 million on capital expenditures.
 
  Great Lakes' domestic fleet is typically positioned on the East and West
coast with a smaller number of vessels on the Gulf of Mexico and on the inland
rivers. The mobility of the Company's fleet enables Great Lakes to move
equipment in response to changes in demand. The Company believes that on
average, its dredge equipment capacity utilization based on actual operating
time is among the highest in the industry. Great Lakes' international fleet is
currently positioned in the Middle East, Europe, Africa, Puerto Rico and
Central and South America.
 
  There are three primary types of dredging equipment: hopper dredges,
hydraulic dredges and mechanical dredges.
 
  Hopper Dredges. Hopper dredges are self-propelled with molded hulls and have
the general appearance of an ocean-going vessel. The dredge has hollow hulls
into which material is suctioned hydraulically through dragarms and deposited.
Once the hollow hulls or "hoppers" are filled, the dredge will sail to the
designated disposal site and either (i) bottom dump the material or (ii) pump
the material from the hoppers through a pipeline to the designated site.
Hopper dredges can operate in rough waters, are less likely to interfere with
ship traffic and can move quickly from one project to another.
 
  Hydraulic Dredges. Hydraulic dredges remove material using a revolving
cutterhead which cuts and churns the sediment on the ocean floor and
hydraulically pumps the material by pipe to the disposal location. These
dredges are very powerful and can dredge some types of rock. Certain dredged
materials can be directly pumped as far as seven miles with the aid of a
booster pump. Hydraulic dredges work with an assortment of support equipment
which help with the positioning and movement of the dredge, handling of the
pipelines, and the placement of the dredged material.
 
  Mechanical Dredges. There are two basic types of mechanical dredges:
clamshell and backhoe. In all cases the dredge uses a bucket which excavates
the material from the ocean floor. The dredged material is placed by the
bucket into material barges or "scows" for transport to the designated
disposal area. The scows are emptied by bottom-dumping, direct-pump out or
removal by a crane with a bucket. Mechanical dredges are capable of removing
hardpacked sediments and debris and can work in tight areas such as along
docks or terminals. Clamshell dredges with specialized buckets are ideally
suited to handle material requiring controlled disposal.
 
  Future Equipment Needs. The current Great Lakes fleet is sufficient to meet
the demand associated with the anticipated future Maintenance dredging and
Beach work. A significant portion of the upcoming Capital projects will
require the use of a special type of backhoe dredge. Great Lakes has
contracted to build a backhoe dredge for delivery in early 1999 to meet the
anticipated timing for these projects. Great Lakes believes that this new
dredge will significantly enhance its ability to efficiently bid and execute a
substantial portion of the upcoming Capital projects. To further enhance the
Company's operating capabilities, on July 27, 1998 the Company entered into an
agreement with T.L. James & Company, Inc., a significant competitor, to
acquire a large hydraulic dredge and midsize hydraulic dredge together with
support equipment, inventory and spare parts. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations--Liquidity and
Capital Resources."
 
 
                                      55
<PAGE>
 
EQUIPMENT CERTIFICATION
 
  Certification of equipment by the U.S. Coast Guard and the establishment of
the permissible loading capacity by the American Bureau of Shipping ("A.B.S.")
are important factors in Great Lakes business. Many projects, such as Beach
Nourishment projects with offshore sand, dredging projects in exposed entrance
channels, and dredging projects with offshore disposal areas, are restricted
by federal regulations to be performed only by dredges or scows that have U.S.
Coast Guard certification and a load line established by the A.B.S. The
certifications indicate that the dredge is structurally capable of operating
in open waters.
 
GOVERNMENT REGULATIONS
 
  The Company is subject to government regulation pursuant to the dredging
statute (46 U.S.C. Section 292) which protects the United States dredging
industry from competition from foreign-built dredges. The law prohibits
foreign-built vessels (absent special legislative action) from competing in
the United States dredging market. Dredges operating in the navigable waters
of the United States must also meet the coastwise trade requirements of the
Jones Act (Section 27 of the Merchant Marine Act, 1920) and Section 2 of the
Shipping Act, 1916, as amended, and must have a coastwise endorsement pursuant
to the Vessel Documentation Act (46 U.S.C. Section 12101 et seq.). These acts
prohibit vessels owned or controlled by entities which are less than 75% owned
and controlled by United States citizens from transporting dredged material
between points in the United States.
 
  The Company's operations and facilities are subject to a variety of federal
and state environmental statutes and regulations. In addition, the Company is
required to comply with federal and state statues designed to protect certain
species and habitats.
 
EMPLOYEES
 
  Currently, the Company employs approximately 220 full-time salaried
personnel, with additional hourly personnel hired on a project-by-project
basis. During 1997, the Company employed an average of approximately 500
hourly personnel, most of whom are unionized, on a project-by-project basis.
Crews are generally available for hire on relatively short notice.
 
  The Company is a party to more than twenty-five collective bargaining
agreements that govern its relationship with its hourly personnel. Six primary
agreements apply to more than ninety percent of such employees, which are
listed below with the corresponding expiration dates of the agreements.
 
  (1) Northern Labor Agreement--Local 25, Marine Division, International
      Union of Operating Engineers, AFL-CIO, expires October 1, 1999
 
  (2) Southern Labor Agreement--Local 25, Marine Division, International
      Union of Operating Engineers, AFL-CIO, expires February 1, 2000
 
  (3) Seafarers International Union of America--Licensed Agreement, expires
      March 1, 2000
 
  (4) Seafarers International Union of America--Unlicensed Agreement, expires
      March 1, 2000
 
  (5) Northern California Agreement--Local 3, International Union of
      Operating Engineers, expires March 1, 2000
 
  (6) Southern California Master Labor Agreement--Local 12, International
      Union of Operating Engineers ("Local 12"), expired August 1, 1998,
      which agreement was extended until August 1, 2001 pursuant to an
      agreement in principle.
 
  During the past five years the only collective labor disruption experienced
by the Company was a strike by Local 12, in August 1995 at the Company's Los
Angeles, California project site. There can be no assurance that the Company
will not experience labor strikes or disturbances in the future.
 
 
                                      56
<PAGE>
 
LEGAL AND ENVIRONMENTAL MATTERS
 
  In the ordinary course of business, Great Lakes is engaged in various
litigation. However, management does not believe any current litigation is
material to the Company's operation or financial position.
 
  In 1992, an underwater utility tunnel located beneath the Chicago Loop
failed adjacent to a construction site completed by Great Lakes during the
fall of 1991. The failure resulted in a flooding of the tunnel and building
basements serviced by the tunnel. Numerous suits were filed against the
Company for claims of flood damage and losses due to business interruption.
During 1997 all remaining claims were settled relating to the Chicago Flood
Litigation.
 
  In 1988 Great Lakes and a subsidiary entered into a plea agreement with the
United States of America wherein Great Lakes and the subsidiary agreed to
plead guilty to five violations of the Sherman Antitrust Act for conspiring to
rig bids on projects between 1981 and 1985. The employment of all former
officers of the Company who were involved in the alleged improper bidding
activities was terminated in 1986. Great Lakes and the subsidiary were never
debarred from bidding by any State or Federal Agency as a result of the
improper bidding activities.
 
  Great Lakes is not currently involved in any material environmental or
related claims or legal matters.
 
  The Company's operations and facilities are subject to a variety of federal
and state environmental statutes and regulations, including those regulating
dredging operations, the disposal of dredged material, wetlands, storm and
waste water discharges, air emissions and the handling of certain substances.
The scope of such statutes and regulations and parties liable thereunder have
been afforded broad interpretations by state and federal regulators and
courts. In addition, the Company is required to comply with federal and state
statutes designed to protect certain species and habitats. Such compliance can
delay the authorization of, appropriation with respect to, and performance of,
particular projects and increase expenses in connection therewith.
 
  The Company cannot predict what environmental laws will be enacted in the
future, how existing or future environmental laws will be administered or
interpreted or what environmental conditions may be found to exist on its
properties. Compliance with more stringent environmental laws, as well as more
vigorous enforcement policies of the regulatory agencies or stricter
interpretation of those laws, and discovery of new conditions may require
additional expenditure by the Company. There can be no assurance that one or
more of the foregoing will not have a material adverse effect on the Company.
 
BACKLOG
 
  The Company's contracts backlog represents management's estimate of the
revenues which will be realized under the Company's contracts remaining to be
performed based upon estimates relating to, among other things, the time
required to mobilize the necessary assets at the project site, the amount of
material necessary to be dredged and the time necessary to demobilize the
project assets. However, such estimates are necessarily subject to
fluctuations based upon the amount of material which actually must be dredged,
as well as factors affecting the time required to complete the job.
Consequently, backlog is not necessarily indicative of future sales. In
addition, because all of the Company's backlog relates to government
contracts, the Company's order backlog can be canceled at any time without
penalty, except, in some cases, the recovery of the Company's actual committed
costs and profit on work performed up to the date of cancellation.
 
  The Company's backlog does not include contract revenues with respect to
project bids that have been awarded to the Company but for which the Company's
customer has not provided an executed contract, which, as of June 30, 1998,
includes $5.4 million of contracts on which the Company was the low bidder,
but which had not yet been awarded to the Company.
 
  As of December 31, 1997, the Company had a backlog of contract revenues of
$155.3 million, which represents an increase of $47.4 million, or 43.9%, over
December 31, 1996 backlog of $107.9 million. The
 
                                      57
<PAGE>
 
Company had backlog of $178.3 million at June 30, 1998, $115.7 of which the
Company expects to complete in 1998, although there can be no assurance that
all such backlog will be completed within that period.
 
  The largest component of backlog at December 31, 1997, was $79.8 million
attributable to a large Capital project in Los Angeles. As of June 30, 1998,
$62.6 million relating to this project remained in backlog which included $2.3
million of additional work awarded in the first six months of 1998.
Additionally, backlog at June 30, 1998 includes $34.3 million attributable to
the Boston Harbor Deep Port project won in the second quarter of 1998.
 
                                      58
<PAGE>
 
                                  MANAGEMENT
 
DIRECTORS, EXECUTIVE OFFICERS AND KEY EMPLOYEES
 
  Set forth below are the names, ages and positions with the Company of the
persons who serve as the directors, executive officers and key employees of
the Company.
 
<TABLE>
<CAPTION>
NAME                               AGE                         POSITION
- ----                               ---                         --------
<S>                                <C> <C>
Douglas B. Mackie................   46 President, Chief Executive Officer and Director
Richard M. Lowry.................   43 Executive Vice President and Chief Operating Officer
Bruce J. Biemeck.................   49 Sr. Vice President, Chief Financial Officer and Treasurer
William F. Pagendarm.............   49 Vice President--Division Manager
Steven F. O'Hara.................   43 Vice President--Division Manager
Bradley T.J. Hansen..............   45 Vice President--Division Manager
Daniel L. Hussin.................   49 Vice President--Manager of U.S. Business Development
Michael A. Delaney...............   44 Director
David Wagstaff III...............   60 Director
</TABLE>
 
  Douglas B. Mackie--Mr. Mackie has been President, Chief Executive Officer
and Director of the Company since 1995. Mr. Mackie joined the Company in 1978
as Corporate Counsel. In 1987 he was named Senior Vice President.
 
  Richard M. Lowry--Mr. Lowry has been the Executive Vice President and Chief
Operating Officer of the Company since 1995. Mr. Lowry joined the Company in
1978 as a Project Engineer and has since held positions of increasing
responsibility in the engineering and operating areas of the Company. In 1990
he was named Senior Vice President and Chief Engineer.
 
  Bruce J. Biemeck--Mr. Biemeck has been the Senior Vice President, Chief
Financial Officer and Treasurer of the Company since 1994. Mr. Biemeck joined
the Company as Controller in 1987. He was named Vice President, Chief
Financial Officer and Treasurer in 1989.
 
  William F. Pagendarm--Mr. Pagendarm has been the Vice President and Division
Manager of the Company since 1985. He joined the Company in 1979 as Project
Superintendent.
 
  Steven F. O'Hara--Mr. O'Hara has been the Vice President and Division
Manager of the Company since 1988. He joined the Company in 1978 as Cost
Accountant.
 
  Bradley T.J. Hansen--Mr. Hansen has been the Vice President and Division
Manager of the Company since 1994, and Vice President & General Superintendent
of the Company from 1991 to 1994. He joined the Company in 1977 as Area
Engineer.
 
  Daniel L. Hussin--Mr. Hussin has been Vice President--Manager of U.S.
Business Development since 1995, and Vice President and Division Manager of
the Company from 1973 to 1995. He joined the Company in 1972 as an Estimator.
 
  Michael A. Delaney--Mr. Delaney became a director of the Company upon
consummation of the Transaction. Mr. Delaney has been a Managing Director of
399 Venture Partners Inc. and its affiliate Citicorp Venture Capital Ltd.
since 1989. From 1986 through 1989, he was Vice President of Citicorp Mergers
and Acquisitions. Mr. Delaney is also a director of GVC Holdings, JAC
Holdings, CORT Business Services, Inc., Palomar Technologies, Inc., SC
Processing, Inc., Triumph Group, Inc., CLARK Material Handling Inc., MSX
International, Delco Remy International Inc., International Knife and Saw
Inc., Fabri-Steel Products, Inc., Aetna Inc. AmeriSource Health Corporation
and Allied Digital Technologies Inc.
 
  David Wagstaff III--Mr. Wagstaff became a director of the Company upon
consummation of the Transaction. Mr. Wagstaff has served as President and
Chief Executive Officer of Vectura Group, Inc. since
 
                                      59
<PAGE>
 
1993. He was previously the Principal in a private consulting business and has
worked in various executive capacities at the Equitable Life Assurance Company
and Citicorp.
 
SUMMARY COMPENSATION TABLE
 
  The following table sets forth all cash compensation paid during 1997 to
Great Lakes' Chief Executive Officer and the next four highest paid executive
officers of the Company (collectively, together with the Chief Executive
Officer, the "Named Executive Officers"):
 
                          SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                  ANNUAL
                                               COMPENSATION
                                            ------------------    ALL OTHER
NAME AND PRINCIPAL POSITION                  SALARY  BONUS (1) COMPENSATION (2)
- ---------------------------                 -------- --------- ----------------
<S>                                         <C>      <C>       <C>
Douglas B. Mackie, President and CEO....... $286,700 $236,814    $ 134,140(3)
Richard M. Lowry, Executive Vice President
 and Chief Operating Officer...............  248,000  204,848      113,586(4)
Bruce J. Biemeck, Senior Vice President,
 Chief Financial Officer and Treasurer.....  176,400  114,484       72,891(5)
William F. Pagendarm, Vice President,
 Division Manager..........................  136,000   35,000       22,188(6)
Bradley T.J. Hansen, Vice President,
 Division Manager..........................  108,000   40,000       19,058(7)
</TABLE>
- --------
(1) Attributable to 1997, but paid in 1998.
(2) Includes employer matching contributions under Great Lakes 401(k) plan,
    profit sharing contribution under 401(k) plan and lost 401(k) benefit
    bonus due to IRS limitations.
(3) Includes employer matching contributions under Great Lakes' 401(k) plan of
    $9,500, profit sharing contribution of $11,000 and payment of lost 401(k)
    benefit due to IRS limitations of $113,640.
(4) Includes employer matching contributions under Great Lakes' 401(k) plan of
    $9,500, profit sharing contribution of $11,000 and payment of lost 401(k)
    benefit due to IRS limitations of $93,086.
(5) Includes employer matching contributions under Great Lakes' 401(k) plan of
    $9,500, profit sharing contribution of $11,000 and payment of lost 401(k)
    benefit due to IRS limitation of $52,391.
(6) Includes employer matching contributions under Great Lakes' 401(k) plan of
    $9,500, profit sharing contribution of $11,000 and payment of lost 401(k)
    benefit due to IRS limitation of $1,688.
(7) Includes employer matching contributions under Great Lakes' 401(k) plan of
    $9,500 and profit sharing contribution of $9,558.
 
EXECUTIVE EMPLOYMENT ARRANGEMENTS
 
  The Company has entered into an Employment Agreement, dated as of January 1,
1992, with Douglas B. Mackie. The employment agreement provides for an initial
term of three years with automatic renewal for successive one year terms,
unless sooner terminated by either party giving 90 days written notice prior
to the end of the then current term. In addition, either party may terminate
the employment agreement at any time, with or without cause, by giving the
other party 30 days prior written notice.
 
  Mr. Mackie's current annual base salary under his employment agreement is
$300,000, which is subject to annual increase as determined by the
compensation committee of the Board of Directors, and benefits as provided
from time to time by the Company to its senior executives. In the event Mr.
Mackie resigns for good reason (defined to include, among other things, a
material breach of the employment agreement by the Company) or the employment
agreement is otherwise terminated by the Company for any reason other than
cause, death or permanent disability, Mr. Mackie will be entitled to receive
severance compensation in the amount equal to the sum of (a) Mr. Mackie's
current annual current base salary and (b) a bonus calculated by multiplying
current base salary by the average percentage of Mr. Mackie's base salary
represented by the bonuses Mr. Mackie received during the term of the
employment agreement.
 
                                      60
<PAGE>
 
  During the term of the employment agreement and for one year thereafter, Mr.
Mackie is prohibited from directly or indirectly carrying on, engaging or
having a financial interest in any business which is in material competition
with the business of the Company.
 
  The Company has also entered into employment agreements with Richard M.
Lowry and Bruce J. Biemeck, which agreements contain terms substantially
similar to Mr. Mackie's employment agreement, other than the amount of base
salary and the office held. Mr. Lowry's and Mr. Biemeck's current annual base
salaries under their respective employment agreements are $260,000 and
$195,000, respectively.
 
                                      61
<PAGE>
 
                          OWNERSHIP OF CAPITAL STOCK
 
  The following table sets forth certain information with respect to the
beneficial ownership of the preferred stock and common stock of the Company
immediately following the Transaction.
 
<TABLE>
<CAPTION>
                                         NUMBER AND PERCENT OF SHARES
                               ------------------------------------------------
                                 PREFERRED
                                   STOCK       CLASS A STOCK    CLASS B STOCK
                               -------------- --------------- -----------------
   NAME OF BENEFICIAL OWNER    NUMBER PERCENT NUMBER  PERCENT  NUMBER   PERCENT
   ------------------------    ------ ------- ------- ------- --------- -------
<S>                            <C>    <C>     <C>     <C>     <C>       <C>
Vectura Holding Company LLC... 41,818  92.9%  818,000  49.9%  3,363,900  100%
 c/o Great Lakes Dredge & Dock
 Corporation
 2122 York Road
 Oak Brook, Illinois 60521
Douglas B. Mackie.............    930   2.1%  208,000  12.7%        --    --
 c/o Great Lakes Dredge & Dock
 Corporation
 2122 York Road
 Oak Brook, Illinois 60521
Richard M. Lowry..............    930   2.1%  208,000  12.7%        --    --
 c/o Great Lakes Dredge & Dock
 Corporation
 2122 York Road
 Oak Brook, Illinois 60521
Bruce J. Biemeck..............    700   1.6%  149,800   9.2%        --    --
 c/o Great Lakes Dredge & Dock
 Corporation
 2122 York Road
 Oak Brook, Illinois 60521
William F. Pagendarm..........    130   0.3%   33,000   2.0%        --    --
Bradley T. J. Hansen..........    130   0.3%   33,000   2.0%        --    --
All directors and executive
 officers as a group..........  3,080   6.8%  697,800  42.7%        --    --
</TABLE>
 
                         DESCRIPTION OF CAPITAL STOCK
 
PREFERRED STOCK
 
  The Company's Certificate of Incorporation provides that the Company may
issue 250,000 shares of preferred stock, all of which is designated as 12%
Series A Cumulative Compounding Preferred Stock (the "Preferred Stock"). The
Preferred Stock has a stated value of $1,000 per share and is entitled to
annual dividends when, as and if declared, which dividends are cumulative,
whether or not earned or declared, and accrue at a rate of 12%, compounding
annually. The vote of a majority of the outstanding shares of the Preferred
Stock, voting as a separate class, is required to (i) create, authorize or
issue any other class or series of stock entitled to a preference prior to the
Preferred Stock upon any dividend or distribution or any liquidation,
distribution of assets, dissolution or winding up of the Company, or increase
the authorized amount of any such other class or series, or (ii) amend the
Company's Certificate of Incorporation if such amendment would adversely
affect the relative rights and preferences of the holders of the Preferred
Stock. Except as described in the immediately preceding sentence or as
otherwise required by law, the Preferred Stock is not entitled to vote. The
Company may not pay any dividend upon (except for a dividend payable in Junior
Stock, as defined below), or redeem or otherwise acquire shares of, capital
stock junior to the Preferred Stock (including the Common Stock) ("Junior
Stock") unless all cumulative dividends on the Preferred Stock have been paid
in full. Upon liquidation, dissolution or winding up of the Company, holders
of Preferred Stock will be entitled to receive out of the legally available
assets of the Company, before any amount shall be paid to holders of Junior
Stock, an amount equal to $1,000 per share of Preferred Stock, plus all
accrued and unpaid dividends to the date of final
 
                                      62
<PAGE>
 
distribution. If such available assets are insufficient to pay the holders of
the outstanding shares of Preferred Stock in full, such assets, or the
proceeds thereof, will be distributed ratably among such holders. The
Preferred Stock will not be mandatorily redeemable prior to the maturity of
the Notes. The Company may optionally redeem, in whole or in part, the
Preferred Stock at any time at a price per share of $1,000, plus accrued and
unpaid dividends to the date of redemption. At the option of the Company, the
Preferred Stock may be exchanged for junior subordinated debentures of the
Company, subject to the Company's compliance with the requirements of the New
Credit Facility, the New Bonding Agreement and the Notes. The Company
currently anticipates that the dividends on the Preferred Stock will be
declared and accrued but not paid. The ability of the Company to pay cash
dividends, and to redeem the Preferred Stock, is subject to restrictions
contained in the New Credit Facility, the New Bonding Agreement and the Notes.
 
COMMON STOCK
 
  The Certificate of Incorporation of the Company provides that the Company
may issue 50 million shares of Common Stock, divided into two classes
consisting of 25 million shares of Class A Stock and 25 million shares of
Class B Stock. The holders of Class A Stock are entitled to one vote for each
share held of record on all matters submitted to a vote of the stockholders.
Except as required by law, the holders of Class B Stock have no voting rights.
Under the Company's Certificate of Incorporation, a holder of either class of
Common Stock may convert any or all of his shares into an equal number of
shares of the other class of Common Stock; provided that in the case of a
conversion from Class B Stock, which is nonvoting, into Class A Stock, which
is voting, the holders of shares to be converted would be permitted under
applicable law to hold the total number of shares of Class A Stock which would
be held after giving effect to the conversion.
 
STOCKHOLDERS' AGREEMENT
 
  In connection with the Transaction, the stockholders of the Company entered
into a Securities Purchase and Holders Agreement (the "Stockholders'
Agreement") containing certain agreements among such stockholders with respect
to the capital stock and corporate governance of the Company. The following is
a summary description of the principal terms of the Stockholders' Agreement.
 
  Pursuant to the Stockholders' Agreement, the Board of Directors of the
Company is composed of up to five directors, which include: Mr. Mackie (so
long as he continues to be President of the Company and own shares of Common
Stock or Preferred Stock); the President of the Company if Mr. Mackie is no
longer serving on the Board of Directors; up to two individuals designated by
Vectura; and the remaining directors shall be such independent directors as
shall be designated by Vectura (to the extent permitted by applicable law as
determined by Vectura in its sole discretion), provided that in the event that
Vectura concludes that it is unable to designate, or elects not to designate
for any reason, one or more of such independent directors or the election of
any such independent director is not approved by the holders of a majority of
the outstanding shares of Class A Stock, such directorship(s) shall not be
filed by the remaining members of the Board of Directors but shall remain
vacant until the election of a director designated by Vectura to fill such
vacancy in accordance with the Stockholders' Agreement.
 
  The Stockholders' Agreement contains certain provisions which, with certain
exceptions, restrict the ability of the stockholders to transfer any Common
Stock or Preferred Stock except pursuant to the terms of the Stockholders'
Agreement. If holders of more than 50% of the Common Stock approve the sale of
the Company (an "Approved Sale"), each stockholder has agreed to consent to
such sale and, if such sale includes the sale of stock, each stockholder has
agreed to sell all of such stockholder's Common Stock and Preferred Stock on
the terms and conditions approved by holders of a majority of the Common Stock
then outstanding. In the event the Company proposes to issue and sell (other
than in a public offering pursuant to a registration statement) any shares of
Common Stock or any securities containing options or rights to acquire any
shares of Common Stock or any securities convertible into Common Stock to
Vectura or any of its respective affiliates, the Company must first offer to
each of the other shareholders a pro rata portion of such shares. Such
preemptive rights will not be applicable to the issuance of shares of Common
Stock upon conversion of shares of one class of Common Stock
 
                                      63
<PAGE>
 
into shares of the other class. Subject to certain limitations neither
Vectura, nor any of its respective affiliates, may sell any of their shares of
Preferred Stock or Common Stock without offering the other stockholders a pro
rata opportunity to participate in such sale.
 
  The Stockholders' Agreement also provides for certain additional
restrictions on transfer of shares by Management Investors, including the
right of the Company to repurchase certain shares upon termination of such
stockholder's employment prior to 2003, at a formula price, and the grant of a
right of first refusal in favor of the Company in the event a Management
Investor elects to transfer shares of Common Stock.
 
STOCKHOLDERS' REGISTRATION RIGHTS AGREEMENT
 
  In connection with their entry into the Stockholders' Agreement, the
Company, Vectura, the Management Investors and certain other stockholders of
the Company entered into the Stockholders' Registration Rights Agreement.
Pursuant to the Stockholders' Registration Rights Agreement, upon the written
request of Vectura, the Company will prepare and file a registration statement
with the Securities and Exchange Commission concerning the distribution of all
or part of the shares held by Vectura and use its best efforts to cause such
registration statement to become effective. If at any time the Company files a
registration statement for the Common Stock pursuant to a request by Vectura
or otherwise (other than a registration statement of Form S-8, Form S-4 or any
similar form, a registration statement filed in connection with a share
exchange or an offering solely to the Company's employees or existing
stockholders, or a registration statement registering a unit offering (as
defined)) (a "Qualifying Offering"), the Company will use its best efforts to
allow the other parties to the Stockholders' Registration Rights Agreement to
have their shares of Common Stock (or a portion of their shares under certain
circumstances) included in such offering of Common Stock. Registration
expenses of the selling stockholders (other than underwriting fees, brokerage
fees and transfer taxes applicable to the shares sold by such stockholders or
in certain cases the fees and expenses of any accountants or other
representatives retained by a selling stockholder) will be paid by Company.
 
                                      64
<PAGE>
 
                    DESCRIPTION OF THE NEW CREDIT FACILITY
 
  As part of the Transaction, the Company entered into a New Credit Facility
with a group of financial institutions (the "Lenders"), arranged by Bank of
America National Trust and Savings Association ("B of A"), with Bank of
Montreal, Chicago Branch, as the documentation agent and B of A acting as the
administrative agent for the Lenders ("Agent"). The New Credit Facility
provides for (i) the Revolving Credit Facility in the maximum amount of $55.0
million and (ii) a term loan facility (the "Term Loan Facility") in the amount
of $55.0 million. At Closing, the Company borrowed approximately $55.0 million
under the Term Loan Facility and approximately $7.1 million under the
Revolving Credit Facility. In addition, approximately $10.0 million of face
amount of letters of credit was outstanding under the Revolving Credit
Facility at closing. The Revolving Credit Facility enables the Company to
obtain revolving credit loans and standby letters of credit for the account to
the Company from time to time for working capital, acquisitions and general
corporate purposes. The New Credit Facility will expire on the six and one-
half year anniversary of the closing date.
 
  The loans under the Revolving Credit Facility will bear interest, generally
at the Company's option, at a Base Rate plus a Base Rate Margin or at an
adjusted Eurodollar Rate plus Eurodollar Rate Margin. The "Base Rate" will
equal the higher of (A) the rate of interest publicly announced from time to
time by B of A, and (B) 0.5% per annum above the latest Federal Funds Rate.
The "Base Rate Margin" will range from 0.0% to 1.0% depending on the Company's
ratio of consolidated total debt to cashflow. The "Eurodollar Rate" will equal
the rate of interest determined by the Agent to be the rate per annum at which
deposits in Dollars in immediately available funds are offered to the Agent in
the interbank Eurodollar market two business days prior to the beginning of
the applicable interest period. The Eurodollar Rate Margin will range from
1.25% to 2.75% depending on the Company's ratio of consolidated total debt to
cashflow.
 
  The New Credit Facility contains various covenants that restrict the Company
from various actions and that require the Company to achieve and maintain
certain financial covenants. The New Credit Facility includes financial
covenants consisting of a total debt to cashflow ratio, a senior debt to
cashflow ratio, a cashflow to interest expense ratio and a minimum net worth
test, and limitations on, among other things, indebtedness, liens, capital
expenditures, dividends, business activities, investments and guarantees, sale
of assets, consolidations and mergers, and amendments or modifications to the
New Bonding Agreement or its certificate of incorporation, bylaws, shareholder
agreements, voting trusts or other similar arrangements.
 
  The New Credit Facility includes events of default consisting of, among
other things: (i) any failure to pay principal or failure in the payment of
any reimbursement obligation under any letter of credit, or to pay interest or
fees within three business days after the date due or any other obligations
within five business days after the date due; (ii) any failure to pay certain
other indebtedness or contingent obligations, or defaults that result in or
permit the acceleration of such indebtedness or contingent obligations; (iii)
the breach by the Company or certain of its subsidiaries of covenants,
representations or warranties contained in the New Credit Facility; (iv)
certain events of bankruptcy, insolvency or dissolution of the Company or its
subsidiaries; (v) the incurrence of certain pension-related liabilities,
including liabilities with respect to failures to make certain required
contributions when due and termination of, or withdrawal from, certain pension
plans which result in liabilities in excess of specified amounts; (vi) the
invalidity of or any challenge to the validity of the guarantees of the
indebtedness under the New Credit Facility or of the security interests
granted to the Lenders; (vii) default by the Company or any of its
subsidiaries in the payment when due of any amount due under the New Bonding
Agreement or a breach or default with respect to any other term of the New
Bonding Agreement or bonded contracts that are the subject of such New Bonding
Agreement, or the failure of any surety in connection with the New Bonding
Agreement to issue bonds thereunder, the effect of which is materially adverse
to the Company; and (viii) certain change in control of the Company or its
subsidiaries.
 
  All obligations under the New Credit Facility are guaranteed by each of the
Subsidiary Guarantors. The loans under the New Credit Facility are secured by:
(i) a perfected first priority lien and security interest (exclusive of all
liens and security interests other than those in favor of the bonding company)
in vessels and
 
                                      65
<PAGE>
 
equipment approved by the Agent and having appraised orderly liquidation value
of at least $65.0 million; (ii) a perfected second priority lien and security
interest in all vessels and equipment (with the exception of those vessels and
equipment operated by NATCO) securing the bonding company; (iii) a perfected
second priority lien in certain assets; and (iv) a security interest in all of
the accounts receivable of the Company and its subsidiaries.
 
  In connection with the execution of the New Credit Facility and the New
Bonding Agreement, the Agent and the sureties under the New Bonding Agreement
(the "Sureties") entered into an intercreditor agreement which addresses,
among other things, the lien priorities of shared collateral, the substitution
of vessels under ship mortgages, the exercise of rights under ship mortgages
and other shared collateral agreements, the application of proceeds of various
classes of shared collateral as well as certain collateral benefitting only
the Sureties, the exercise of remedies under the New Credit Facility and the
New Bonding Agreement, the release of certain liens, the taking of additional
collateral and other relevant intercreditor provisions. In addition, the
intercreditor agreement provides that the Sureties will have the right to use
all encumbered vessels and other equipment to perform any outstanding bonded
contracts.
 
                                      66
<PAGE>
 
                     DESCRIPTION OF NEW BONDING AGREEMENT
 
  As part of the Transaction, the Company and certain of its subsidiaries
entered into an Amended and Restated Underwriting and Continuing Indemnity
Agreement (the "New Bonding Agreement") with the Sureties, pursuant to which
the Sureties will act as surety, issue bid bonds, performance bonds and
payment bonds and obligate themselves upon other contracts of guaranty
required by the Company and its subsidiaries in the day-to-day operations of
its dredging business. The Sureties obligations under the New Bonding
Agreement are discretionary. As such, the Sureties are not obligated under the
New Bonding Agreement to issue bonds on behalf of the Company or any of its
subsidiaries.
 
  The New Bonding Agreement contains various covenants that restrict the
Company from various actions and that require the Company to achieve and
maintain certain financial covenants. The New Bonding Agreement includes a
current ratio and a minimum net worth test, and limitations on, among other
things, indebtedness and contingent obligations, cash dividends, liens,
business combinations, investments, business activities, sale of assets,
issuances of equity and affiliate transactions.
 
  The New Bonding Agreement includes events of default with respect to the
Company and certain of its subsidiaries, consisting of, among other things:
(i) the failure to pay any obligation owing to the Sureties; (ii) the breach
of covenants, representations or warranties contained in the New Bonding
Agreement; (iii) certain events of bankruptcy or insolvency; (iv) the default
of any provision under a bonded contract; (v) the failure to pay certain other
indebtedness, or defaults that result or permit the acceleration of such
indebtedness or contingent obligation; and (vi) certain judgments that are not
fully covered by insurance or bonded or discharged.
 
  The obligations of the Company and its wholly owned subsidiaries under the
New Bonding Agreement are secured by a security interest in the Company's
fixed assets. In the event the Company or any of its subsidiaries fails or is
unable to complete the work under a bonded contract or breaches the New
Bonding Agreement, the Sureties may proceed against their collateral, cause
the performance of such bonded contract by subletting it in the name of the
Company or its wholly-owned subsidiary and seek reimbursement from the Company
and its wholly owned subsidiary for costs incurred in the subletting or
performance of such bonded contract.
 
  In connection with the execution of the New Credit Facility and the New
Bonding Agreement, the Agent and the Sureties entered into an intercreditor
agreement which addresses, among other things, the lien priorities of shared
collateral, the substitution of vessels under ship mortgages, the exercise of
rights under ship mortgages and other shared collateral agreements, the
application of proceeds of various classes of shared collateral as well as
certain collateral benefitting only the Sureties, the exercise of remedies
under the New Credit Facility and the New Bonding Agreement, the release of
certain liens, the taking of additional collateral and other relevant
intercreditor provisions. In addition, the intercreditor agreement provides
that the Sureties will have the right to use all encumbered vessels and other
equipment to perform any outstanding bonded contracts.
 
                                      67
<PAGE>
 
                             DESCRIPTION OF NOTES
 
GENERAL
 
  The Existing Notes were issued pursuant to an Indenture (the "Indenture")
among the Company, the Subsidiary Guarantors and The Bank of New York, as
trustee (the "Trustee"), in a private transaction that was not subject to the
registration requirements of the Securities Act. The terms of the Indenture
apply to the Existing Notes and to the Exchange Notes to be issued in exchange
therefor pursuant to the Exchange Offer (all such Notes being referred to
herein collectively as the "Notes"). The terms of the Notes include those
stated in the Indenture and those made part of the Indenture by reference to
the Trust Indenture Act. The Notes are subject to all such terms, and Holders
of Notes are referred to the Indenture and the Trust Indenture Act for a
statement thereof. The following summary of the material provisions of the
Indenture does not purport to be complete and is qualified in its entirety by
reference to the Indenture, including the definitions therein of certain terms
used below. Copies of the Indenture, the form of Notes and the Registration
Rights Agreement are available as set forth below under "--Additional
Information." The definitions of certain terms used in the following summary
are set forth below under "--Certain Definitions." For purposes of this
summary, the term "Company" refers only to Great Lakes Dredge & Dock
Corporation and not to any of its Subsidiaries.
 
  The Notes are general unsecured obligations of the Company, subordinated in
right of payment to all existing and future Senior Debt, including
Indebtedness pursuant to the New Credit Facility. The Company's obligations
under the Notes are guaranteed (the "Subsidiary Guarantees") on a senior
subordinated basis by the Subsidiary Guarantors. See "--Subsidiary
Guarantees." As of June 30, 1998, on a pro forma basis after giving effect to
the Transaction, the Notes would have been subordinated to $62.7 million of
Senior Debt, excluding contingent obligations, of the Company and the
Subsidiary Guarantors and effectively subordinated to $37.2 million of
liabilities of the Company's subsidiaries that are not Subsidiary Guarantors.
Upon closing of the Transaction, approximately $37.9 million was available for
additional borrowing under the New Credit Facility. The Indenture permits the
incurrence of additional Senior Debt in the future. See "Risk Factors--
Subordination."
 
  The operations of the Company are conducted through its Subsidiaries and,
therefore, the Company is dependent upon the cash flow of such Subsidiaries to
meet their obligations, including their obligations under the Notes. All of
the existing domestic Wholly Owned Restricted Subsidiaries of the Company are,
and all future domestic Restricted Subsidiaries are expected to be, Subsidiary
Guarantors. As of the date of this Prospectus, all of the Company's
Subsidiaries are Restricted Subsidiaries. However, under certain
circumstances, the Company will be able to designate current or future
Subsidiaries as Unrestricted Subsidiaries. Unrestricted Subsidiaries will not
be subject to many of the restrictive covenants set forth in the Indenture. In
addition, the Notes are effectively subordinated to all indebtedness and other
liabilities and commitments (including trade payables and capital lease
obligations) of the Company's foreign Subsidiaries and the Company's
Subsidiaries that are not Wholly Owned Restricted Subsidiaries. Any right of
the Company to receive assets of any of its foreign Subsidiaries or its
Subsidiaries that are not Wholly Owned Restricted Subsidiaries upon such
Subsidiary's liquidation or reorganization (and the consequent right of the
Holders of the Notes to participate in those assets) will be effectively
subordinated to the claims of that Subsidiary's creditors. As of June 30,
1998, on a pro forma basis after giving effect to the Transaction, the
aggregate amount of liabilities (including trade payable) of the Company's
foreign Subsidiaries and the Company's Subsidiaries that are not Wholly Owned
Restricted Subsidiaries was $37.2 million.
 
PRINCIPAL, MATURITY AND INTEREST
 
  The Notes are limited in aggregate principal amount to $165.0 million, of
which $115.0 million were issued as the Existing Notes on August 19, 1998, and
will mature on August 15, 2008. Interest on the Notes will accrue at the rate
of 11 1/4% per annum and will be payable semi-annually in arrears on February
15 and August 15 of each year, commencing February 15, 1999, to Holders of
record on the immediately preceding February 1 and August 1. Additional Notes
may be issued from time to time, subject to the provisions of the Indenture
described below under the caption "--Certain Covenants--Incurrence of
Indebtedness and Issuance of Disqualified
 
                                      68
<PAGE>
 
Stock." The Existing Notes, the Exchange Notes and any additional Notes
subsequently issued would be treated as a single class for all purposes under
the Indenture, including without limitations, waivers, amendments, redemptions
and offers to purchase. Interest on the Exchange Notes will accrue from the
most recent date to which interest has been paid on the Existing Notes or, if
no such interest has been paid, from the date of original issuance of the
Existing Notes. Interest will be computed on the basis of a 360-day year
comprised of twelve 30-day months. Principal, premium and Liquidated Damages,
if any, and interest on the Notes will be payable at the office or agency of
the Company maintained for such purpose within the City and State of New York
or, at the option of the Company, payment of principal, premium, interest and
Liquidated Damages, if any, may be made by check mailed to the Holders of the
Notes at their respective addresses set forth in the register of Holders of
Notes; provided that all payments of principal, premium, interest and
Liquidated Damages, if any, with respect to Notes the Holders of which have
given wire transfer instructions to the Company will be required to be made by
wire transfer of immediately available funds to the accounts specified by the
Holders thereof. Until otherwise designated by the Company, the Company's
office or agency in New York will be the office of the Trustee maintained for
such purpose. Notes are issued in denominations of $1,000 and integral
multiples thereof.
 
SUBORDINATION
 
  The payment of principal of, premium, if any, and interest on the Notes is
subordinated in right of payment, as set forth in the Indenture, to the prior
payment in full of all Senior Debt, whether outstanding on the date of the
Indenture or thereafter incurred. The Notes rank pari passu in right of
payment with all other senior subordinated Indebtedness of the Company and
senior in right of payment to all subordinated Indebtedness.
 
  Upon any distribution to creditors of the Company in a liquidation or
dissolution of the Company or in a bankruptcy, reorganization, insolvency,
receivership or similar proceeding relating to the Company or its property, an
assignment for the benefit of creditors or any marshalling of the Company's
assets and liabilities, the holders of Senior Debt will be entitled to receive
payment in full in cash of all Obligations due in respect of such Senior Debt
(including interest after the commencement of any such proceeding at the rate
specified in the applicable Senior Debt whether or not allowed in such
proceeding) before the Holders of Notes will be entitled to receive any
payment with respect to the Notes, and until all Obligations with respect to
such Senior Debt are paid in full in cash, any distribution to which the
Holders of Notes would be entitled shall be made to the holders of Senior Debt
(except that Holders of Notes may receive and retain Permitted Junior
Securities and payments made from the trust described under "--Legal
Defeasance and Covenant Defeasance").
 
  The Company also may not make any payment upon or in respect of the Notes
(except in Permitted Junior Securities or from the trust described under "--
Legal Defeasance and Covenant Defeasance") if (i) a default in the payment of
the principal of, premium, if any, or interest on Designated Senior Debt
occurs and is continuing beyond any applicable period of grace or (ii) any
other default occurs and is continuing with respect to Designated Senior Debt
that permits holders of the Designated Senior Debt as to which such default
relates to accelerate its maturity and the Trustee receives a notice of such
default (a "Payment Blockage Notice") from the Company or the representatives
of the holders of any Designated Senior Debt. Payments on the Notes may and
shall be resumed (a) in the case of a payment default, upon the date on which
such default is cured or waived in writing and (b) in case of a nonpayment
default, the earlier of the date on which such nonpayment default is cured or
waived in writing or 179 days after the date on which the applicable Payment
Blockage Notice is received, unless the maturity of any Designated Senior Debt
has been accelerated. No new period of payment blockage may be commenced
unless and until (i) 360 days have elapsed since the effectiveness of the
immediately prior Payment Blockage Notice and (ii) all scheduled payments of
principal, premium, if any, and interest on the Notes that have come due
during such payment blockage period have been paid in full in cash. No
nonpayment default that existed or was continuing on the date of delivery of
any Payment Blockage Notice to the Trustee shall be, or be made, the basis for
a subsequent Payment Blockage Notice unless such default shall have been
waived for a period of not less than 90 days.
 
  The Indenture further requires that the Company promptly notify holders of
Senior Debt if payment of the Notes is accelerated because of an Event of
Default.
 
                                      69
<PAGE>
 
  As a result of the subordination provisions described above, in the event of
a liquidation or insolvency, Holders of Notes may recover less ratably than
creditors of the Company who are holders of Senior Debt. On a pro forma basis,
after giving effect to the Acquisition, the principal amount of Senior Debt
outstanding at June 30, 1998 would have been approximately $62.7 million. The
Indenture limits, subject to certain financial tests, the amount of additional
Indebtedness, including Senior Debt, that the Company and its subsidiaries can
incur. See "--Certain Covenants--Incurrence of Indebtedness and Issuance of
Disqualified Stock" and "Risk Factors--Subordination."
 
SUBSIDIARY GUARANTEES
 
  The Company's payment obligations under the Notes are fully and
unconditionally guaranteed on a joint and several basis (the "Subsidiary
Guarantees") by the Subsidiary Guarantors. The Subsidiary Guarantee of each
Subsidiary Guarantor is subordinated to the prior payment in full of all
Senior Debt of such Guarantor. As of June 30, 1998, on a pro forma basis
giving effect to the Transaction, the Subsidiary Guarantors would have had an
aggregate of approximately $62.7 million of Senior Debt outstanding. The
Indenture permits the Subsidiary Guarantors to incur additional Senior Debt,
subject to certain limitations. The obligations of each Subsidiary Guarantor
under its Subsidiary Guarantee will be limited so as not to constitute a
fraudulent conveyance under applicable law. See, however, "Risk Factors--
Fraudulent Conveyance Statutes."
 
  The Indenture provides that no Subsidiary Guarantor may consolidate with or
merge with or into (whether or not such Subsidiary Guarantor is the surviving
Person), another Person whether or not affiliated with such Subsidiary
Guarantor unless (i) subject to the provisions of the following paragraph, the
Person formed by or surviving any such consolidation or merger (if other than
such Subsidiary Guarantor) assumes, by operation of law or otherwise, all the
obligations of such Subsidiary Guarantor pursuant to a supplemental indenture
in form and substance reasonably satisfactory to the Trustee, under the Notes,
the Subsidiary Guarantees, the Indenture, and the Registration Rights
Agreement; and (ii) immediately after giving effect to such transaction, no
Default or Event of Default exists, provided that nothing in the foregoing
provisions shall prohibit the merger or consolidation of a Subsidiary
Guarantor with and into the Company or another Wholly Owned Subsidiary
Guarantor where the Company or such other Wholly Owned Subsidiary Guarantor is
the surviving Person.
 
  The Indenture provides that in the event of a sale or other disposition of
all or substantially all of the assets of any Subsidiary Guarantor, by way of
merger, consolidation or otherwise, or a sale or other disposition of all of
the capital stock of any Subsidiary Guarantor, then such Subsidiary Guarantor
(in the event of a sale or other disposition, by way of such a merger,
consolidation or otherwise, of all of the capital stock of such Subsidiary
Guarantor) or the corporation or other entity acquiring the property (in the
event of a sale or other disposition of all or substantially all of the assets
of such Subsidiary Guarantor) will be released and relieved of any and all
obligations under its Subsidiary Guarantee (and, in the event of a disposition
of assets, any Liens in favor of the Holders will be released); provided that
the Net Proceeds of such sale or other disposition are applied in accordance
with the applicable provisions of the Indenture. See "--Repurchase at Option
of Holders", "--Asset Sales." In addition, the Indenture provides that, in the
event the Company designates a Restricted Subsidiary to become an Unrestricted
Subsidiary in accordance with the Indenture, then such Restricted Subsidiary
shall, in accordance with the Indenture, be released from its obligations
under its Subsidiary Guarantee upon the effectiveness of such designation.
 
                                      70
<PAGE>
 
OPTIONAL REDEMPTION
 
  The Notes are redeemable at any time at the option of the Company, in whole
or in part upon not less than 30 nor more than 60 days' notice, in cash at the
redemption prices (expressed as percentages of principal amount) set forth
below plus accrued and unpaid interest and Liquidated Damages, if any, thereon
to the applicable redemption date, if redeemed during the twelve-month period
beginning on August 15 of the years indicated below:
 
<TABLE>
<CAPTION>
     YEAR                                                             PERCENTAGE
     <S>                                                              <C>
     2003............................................................  105.625%
     2004............................................................  103.750%
     2005............................................................  101.875%
     2006 and thereafter.............................................  100.000%
</TABLE>
 
  Notwithstanding the foregoing, at any time prior to August 15, 2001, the
Company may (but will not have the obligation to) on any one or more occasions
redeem up to 35% of the aggregate principal amount of Notes originally issued
at a redemption price equal to 111.250% of the principal amount thereof, plus
accrued and unpaid interest and Liquidated Damages, if any, thereon to the
redemption date, with the net cash proceeds of one or more Public Equity
Offerings; provided that at least 65% of the aggregate principal amount of
Notes originally issued remain outstanding immediately after the occurrence of
such redemption (excluding Notes held by the Company and its Subsidiaries);
and provided, further, that such redemption shall occur within 180 days of the
date of the closing of such Public Equity Offering.
 
SELECTION AND NOTICE
 
  If less than all of the Notes are to be redeemed or repurchased at any time,
selection of Notes for redemption or repurchase will be made by the Trustee in
compliance with the requirements of the principal national securities
exchange, if any, on which the Notes are listed, or, if the Notes are not so
listed, on a pro rata basis, by lot or by such method as the Trustee shall
deem fair and appropriate; provided that no Notes of $1,000 or less shall be
redeemed in part. Notices of redemption shall be mailed by first class mail at
least 30 but not more than 60 days before the redemption date to each Holder
of Notes to be redeemed at its registered address. Notices of redemption or
repurchase may not be conditional. If any Note is to be redeemed or
repurchased in part only, the notice of redemption or repurchase that relates
to such Note shall state the portion of the principal amount thereof to be
redeemed or repurchased. A new Note in principal amount equal to the
unredeemed or unrepurchased portion thereof will be issued in the name of the
Holder thereof upon cancellation of the original Note. Notes called for
redemption or repurchase become due on the date fixed for redemption or
repurchase. On and after the redemption or repurchase date, interest and
Liquidated Damages ceases to accrue on Notes or portions of them called for
redemption or repurchase.
 
MANDATORY REDEMPTION
 
  Except as set forth below under "--Repurchase at the Option of Holders," the
Company is not required to make mandatory redemption or sinking fund payments
with respect to the Notes.
 
REPURCHASE AT THE OPTION OF HOLDERS
 
 Change of Control
 
  Upon the occurrence of a Change of Control, each Holder of Notes will have
the right to require the Company to repurchase all or any part (equal to
$1,000 or an integral multiple thereof) of such Holder's Notes pursuant to the
offer described below (the "Change of Control Offer") at an offer price in
cash equal to 101% of the aggregate principal amount thereof plus accrued and
unpaid interest and Liquidated Damages thereon, if any, to the date of
purchase (the "Change of Control Payment"). Within 30 days following any
Change of Control, the Company will mail a notice to each Holder describing
the transaction or transactions that constitute the Change of Control and
offering to repurchase Notes on the date specified in such notice, which date
shall be
 
                                      71
<PAGE>
 
no earlier than 30 days and no later than 60 days from the date such notice is
mailed (the "Change of Control Payment Date"), pursuant to the procedures
required by the Indenture and described in such notice. The Company will
comply with the requirements of Rule 14e-1 under the Exchange Act and any
other securities laws and regulations thereunder to the extent such laws and
regulations are applicable in connection with the repurchase of the Notes as a
result of a Change of Control. To the extent that the provisions of any
securities laws or regulations directly conflict with the provisions of the
Indenture relating to such Change of Control Offer, the Company will comply
with the applicable securities laws and regulations and shall not be deemed to
have breached its obligations described in the Indenture by virtue thereof.
 
  On the Change of Control Payment Date, the Company will, to the extent
lawful, (1) accept for payment all Notes or portions thereof properly tendered
pursuant to the Change of Control Offer, (2) deposit with the Paying Agent (as
defined in the Indenture) an amount equal to the Change of Control Payment in
respect of all Notes or portions thereof so tendered and (3) deliver or cause
to be delivered to the Trustee the Notes so accepted together with an
Officers' Certificate stating the aggregate principal amount of Notes or
portions thereof being purchased by the Company. The Paying Agent will
promptly mail to each Holder of Notes so tendered the Change of Control
Payment for such Notes, and the Trustee will promptly authenticate and mail
(or cause to be transferred by book entry) to each Holder a new Note equal in
principal amount to any unpurchased portion of the Notes surrendered, if any;
provided that each such new Note will be in a principal amount of $1,000 or an
integral multiple thereof. The Indenture provides that, prior to complying
with the provisions of this covenant, but in any event within 90 days
following a Change of Control, the Company will either repay all outstanding
Senior Debt or obtain the requisite consents, if any, under the agreements
governing outstanding Senior Debt to permit the repurchase of Notes required
by this covenant. The Company will publicly announce the results of the Change
of Control Offer on or as soon as practicable after the Change of Control
Payment Date.
 
  The Change of Control provisions described above will be applicable whether
or not any other provisions of the Indenture are applicable (and will not
affect the subordination provisions). Except as described above with respect
to a Change of Control, the Indenture does not contain provisions that permit
the Holders of the Notes to require that the Company repurchase or redeem the
Notes in the event of a takeover, recapitalization or similar transaction. The
New Credit Facility currently prohibits the Company from repurchasing any
Notes and also provides that certain change of control events with respect to
the Company would constitute a default thereunder. Any future credit
agreements or other agreements relating to Senior Debt to which the Company
becomes a party may contain similar restrictions and provisions. In the event
a Change of Control occurs at a time when the Company is prohibited from
purchasing Notes, the Company could seek the consent of its lenders to the
purchase of Notes or could attempt to refinance the borrowings that contain
such prohibition. If the Company does not obtain such a consent or repay such
borrowings, the Company will remain prohibited from purchasing Notes. In such
case, the Company's failure to purchase tendered Notes would constitute an
Event of Default under the Indenture which would, in turn, constitute a
default under the New Credit Facility. In such circumstances, the
subordination provisions in the Indenture would likely restrict payments to
the Holders of Notes. In addition, the exercise by Holders of the Notes of
their right to require the Company to repurchase the Notes could cause a
default under such Senior Debt, even if the Change of Control itself does not,
due to the financial effect of such repurchases on the Company. Finally, the
Company's ability to pay cash to the Holders of Notes upon a repurchase may be
limited by the Company's then existing financial resources.
 
  The Company will not be required to make a Change of Control Offer upon a
Change of Control if a third party makes the Change of Control Offer in the
manner, at the times and otherwise in compliance with the requirements set
forth in the Indenture applicable to a Change of Control Offer made by the
Company and purchases all Notes validly tendered and not withdrawn under such
Change of Control Offer.
 
  "Change of Control" means the occurrence of any of the following: (i) the
sale, lease, transfer, conveyance or other disposition (other than by way of
merger or consolidation), in one or a series of related transactions, of all
or substantially all of the assets of the Company and its Subsidiaries
(determined on a consolidated basis), in each case, to any "person" (as such
term is used in Section 13(d)(3) of the Exchange Act) other than the
 
                                      72
<PAGE>
 
Company or a Wholly Owned Restricted Subsidiary or any Principal or a Related
Party of a Principal (as defined below), (ii) the adoption of a plan relating
to the liquidation or dissolution of the Company (other than in a transaction
which complies with the provisions described under "--Merger, Consolidation or
Sale of Assets"), (iii) the consummation of any transaction (including,
without limitation, any merger or consolidation) the result of which is that
any "person" (as defined above), other than one or more Principals or their
Related Parties, becomes the "beneficial owner" (as such term is defined in
Rule 13d-3 and Rule 13d-5 under the Exchange Act, except that a person shall
be deemed to have "beneficial ownership" of all securities that such person
has the right to acquire, whether such right is currently exercisable or is
exercisable only upon the occurrence of a subsequent condition), directly or
indirectly, of more than 50% of the Voting Stock of the Company (measured by
voting power rather than number of shares) and the Principals do not
beneficially own as much or more of the Voting Stock of the Company (measured
by voting power rather than by number of shares) than such person or (iv) the
first day on which a majority of the members of the Board of Directors of the
Company are not Continuing Directors.
 
  The definition of Change of Control includes a phrase relating to the sale,
lease, transfer, conveyance or other disposition of "all or substantially all"
of the assets of the Company and its Subsidiaries (determined on a
consolidated basis). Although there is a developing body of case law
interpreting the phrase "substantially all," there is no precise established
definition of the phrase under applicable law. Accordingly, the ability of a
Holder of Notes to require the Company to repurchase such Notes as a result of
a sale, lease, transfer, conveyance or other disposition of less than all of
the assets of the Company and its Subsidiaries taken as a whole to another
Person or group may be uncertain.
 
  "Continuing Directors" means, as of any date of determination, any member of
the Board of Directors of the Company who (i) was a member of such Board of
Directors on the date of the Indenture or (ii) was nominated for election or
elected to such Board of Directors with the approval of a majority of the
Continuing Directors who were members of such Board at the time of such
nomination or election or was designated by a Principal or a Related Party of
a Principal.
 
  "Principals" means (i) CVC and the Management Investors and (ii) any Related
Party of a Person referred to in clause (i).
 
  "Related Party" means (a) with respect to CVC (i) Citicorp, any direct or
indirect wholly owned subsidiary of Citicorp, and any officer, director or
employee of CVC, Citicorp or any wholly owned subsidiary of Citicorp, (ii) any
spouse or lineal descendant (including by adoption and stepchildren) of the
officers, directors and employees referred to in clause (a) (i) above, (iii)
any trust, corporation or partnership 100%-in-interest of the beneficiaries,
stockholders or partners of which consists of one or more of the persons
described in clause (a) (i) or (ii) above or (iv) Vectura, so long as CVC or
any of its Related Parties described in (i), (ii) or (iii) above holds at
least 50% of the Great Lakes membership interests in Vectura; and (b) with
respect to any officer or employee of the Company or a Subsidiary of the
Company (i) any spouse or lineal descendant (including by adoption and
stepchildren) of such officer or employee and (ii) any trust, corporation or
partnership 100%-in-interest of the beneficiaries, stockholders or partners of
which consists of such officer or employee, any of the persons described in
clause (b) (i) above or any combination thereof.
 
ASSET SALES
 
  The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, consummate an Asset Sale unless (i) the
Company (or the Restricted Subsidiary, as the case may be) receives
consideration at the time of such Asset Sale at least equal to the fair market
value (evidenced by a resolution of the Board of Directors set forth in an
Officers' Certificate delivered to the Trustee) of the assets or Equity
Interests issued or sold or otherwise disposed of and (ii) at least 75% of the
consideration therefor received by the Company or such Restricted Subsidiary
is in the form of Qualified Proceeds; provided that the aggregate fair market
value of Qualified Proceeds (other than cash or Cash Equivalents), which may
be received in consideration for asset sales pursuant to this clause (ii)
shall not exceed $5.0 million since the date of the
 
                                      73
<PAGE>
 
Indenture; provided further that the amount of (x) any liabilities (as shown
on the Company's or such Restricted Subsidiary's most recent balance sheet),
of the Company or any Restricted Subsidiary (other than contingent liabilities
and liabilities that are by their terms subordinated to the Notes or any
guarantee thereof) that are assumed by the transferee of any such assets
pursuant to a customary novation agreement that releases the Company or such
Restricted Subsidiary from further liability and (y) any securities, Notes or
other obligations received by the Company or any such Restricted Subsidiary
from such transferee that are converted by the Company or such Restricted
Subsidiary into cash (to the extent of the cash received) within 90 days
following the closing of such Asset Sale, shall be deemed to be cash for
purposes of this provision, provided further that the 75% limitation referred
to above shall not apply to any Asset Sale in which the cash and Cash
Equivalents portion of the consideration received therefor, determined in
accordance with the foregoing proviso, is equal to or greater than what the
net after-tax proceeds would have been had such Asset Sale complied with the
aforementioned 75% limitation.
 
  Within 360 days after the receipt of any Net Proceeds from an Asset Sale,
the Company or any Restricted Subsidiary may apply such Net Proceeds, at its
option, (a) to repay Senior Debt, (b) to the acquisition of a majority of the
assets of, or a majority of the Voting Stock of, another Permitted Business,
the making of a capital expenditure or the acquisition or commitment to
acquire (provided that such commitment or a reasonable replacement thereof is
consummated substantially in accordance with the terms thereof) of other
assets that are used or useful in a Permitted Business or (c) for a
combination of uses described in clauses (a) and (b). Pending the final
application of any such Net Proceeds, the Company and its Restricted
Subsidiaries may temporarily reduce revolving credit borrowings or otherwise
invest such Net Proceeds in any manner that is not prohibited by the
Indenture. Any Net Proceeds from Asset Sales that are not applied or invested
as provided in the first sentence of this paragraph will be deemed to
constitute "Excess Proceeds." When the aggregate amount of Excess Proceeds
exceeds $10.0 million, the Company will be required to make an offer to all
Holders of Notes (an "Asset Sale Offer") to purchase the maximum principal
amount of Notes that may be purchased out of the Excess Proceeds, at an offer
price in cash in an amount equal to 100% of the principal amount thereof plus
accrued and unpaid interest and Liquidated Damages thereon, if any, to the
date of repurchase, in accordance with the procedures set forth in the
Indenture. To the extent that any Excess Proceeds remain after consummation of
an Asset Sale Offer, the Company may use such Excess Proceeds for any general
corporate purpose. If the aggregate principal amount of Notes tendered into
such Asset Sale Offer surrendered by Holders thereof exceeds the amount of
Excess Proceeds, the Trustee shall select the Notes to be purchased on a pro
rata basis. Upon completion of each Asset Sale Offer, the amount of Excess
Proceeds shall be reset at zero.
 
CERTAIN COVENANTS
 
 Restricted Payments
 
  The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, directly or indirectly: (i) declare or pay any
dividend or make any other payment or distribution on account of the Company's
or any of its Restricted Subsidiaries' Equity Interests (including, without
limitation, any payment in connection with any merger or consolidation
involving the Company or any of its Restricted Subsidiaries) or to the direct
or indirect holders of the Company's or any of its Restricted Subsidiaries'
Equity Interests in their capacity as such (other than, in each case,
dividends or distributions payable in Equity Interests (other than
Disqualified Stock) of the Company or dividends or distributions payable to
the Company or a Restricted Subsidiary of the Company); (ii) purchase, redeem
or otherwise acquire or retire for value (including, without limitation, in
connection with any merger or consolidation involving the Company) any Equity
Interests of the Company (other than Equity Interests owned by the Company or
any Restricted Subsidiary of the Company) or any direct or indirect parent of
the Company; (iii) make any payment on or with respect to, or purchase,
redeem, defease or otherwise acquire or retire for value any Indebtedness that
is subordinated to the Notes (other than any subordinated indebtedness held by
the Company or any Subsidiary Guarantor), except a payment of interest or
principal at Stated Maturity; or (iv) make any Restricted Investment (all such
payments and other actions set forth in clauses (i) through (iv) above being
collectively referred to as "Restricted Payments"), unless:
 
 
                                      74
<PAGE>
 
    (a)  at the time of and after giving effect to such Restricted Payment,
  no Default or Event of Default shall have occurred and be continuing or
  would occur as a consequence thereof; and
 
    (b) the Company would, at the time of such Restricted Payment and after
  giving pro forma effect thereto as if such Restricted Payment had been made
  at the beginning of the applicable four-quarter period, have been permitted
  to incur at least $1.00 of additional Indebtedness pursuant to the Fixed
  Charge Coverage Ratio test set forth in the first paragraph of the covenant
  described below under the caption "--Incurrence of Indebtedness and
  Issuance of Disqualified Stock;" and
 
    (c)  such Restricted Payment, together with the aggregate amount of all
  other Restricted Payments made by the Company and its Restricted
  Subsidiaries after the date of the Indenture (excluding Restricted Payments
  permitted by clauses (ii), (iii), (iv), (viii), (ix) and (xi) of the next
  succeeding paragraph), is less than the sum, without duplication, of (i)
  50% of the Consolidated Net Income of the Company for the period (taken as
  one accounting period) from the beginning of the first fiscal quarter
  commencing after the date of the Indenture to the end of the Company's most
  recently ended fiscal quarter for which internal financial statements are
  available at the time of such Restricted Payment (or, if such Consolidated
  Net Income for such period is a deficit, less 100% of such deficit), plus
  (ii) 100% of the aggregate fair market value of Qualified Proceeds received
  by the Company since the date of the Indenture as a contribution to its
  equity capital or from the issue or sale of Equity Interests of the Company
  (other than Disqualified Stock) or from the issue or sale of Disqualified
  Stock or debt securities of the Company that have been converted into such
  Equity Interests (other than Equity Interests (or Disqualified Stock or
  convertible debt securities) sold to a Subsidiary of the Company), plus
  (iii) to the extent that any Restricted Investment that was made after the
  date of the Indenture is sold for cash or otherwise liquidated or repaid
  for Qualified Proceeds, the lesser of (A) the fair market of the Qualified
  Proceeds received with respect to such Restricted Investment (less the cost
  of disposition, if any) and (B) the initial amount of such Restricted
  Investment, plus (iv) 50% of any dividends received by the Company or a
  Wholly Owned Restricted Subsidiary after the date of the Indenture from an
  Unrestricted Subsidiary of the Company, to the extent that such dividends
  were not otherwise included in Consolidated Net Income of the Company for
  such period, plus (v) to the extent that any Unrestricted Subsidiary is
  redesignated as a Restricted Subsidiary after the date of the Indenture,
  the lesser of (A) the fair market value of the Company's Investment in such
  Subsidiary as of the date of such redesignation or (B) such fair market
  value as of the date on which such Subsidiary was originally designated as
  an Unrestricted Subsidiary.
 
  The foregoing provisions do not prohibit: (i) the payment of any dividend
within 60 days after the date of declaration thereof, if at said date of
declaration such payment would have complied with the provisions of the
Indenture; (ii) the redemption, repurchase, retirement, defeasance or other
acquisition of any subordinated Indebtedness or Equity Interests of the
Company or any Subsidiary Guarantor, in each case, in exchange for, or out of
the net cash proceeds of the substantially concurrent sale (other than to a
Subsidiary of the Company) of, other Equity Interests of the Company (other
than any Disqualified Stock) or the net cash proceeds of a common equity
capital contribution to the Company; provided that the amount of any such net
cash proceeds that are utilized for any such redemption, repurchase,
retirement, defeasance or other acquisition shall be excluded from clause (c)
(ii) of the preceding paragraph; (iii) the defeasance, redemption, repurchase
or other acquisition of subordinated Indebtedness with the net cash proceeds
from an incurrence of Permitted Refinancing Indebtedness; (iv) the payment of
any dividend or making of any distribution by a Subsidiary of the Company to
the holders of its Equity Interests on a pro rata basis; (v) the repurchase,
redemption or other acquisition or retirement for value of any Equity
Interests of the Company or any Subsidiary of the Company held by any former
member of the Company's (or any of their Subsidiaries') Board of Directors or
any former officer, employee or director of the Company or any of its
Restricted Subsidiaries pursuant to any equity subscription agreement,
stockholder agreement, stock option agreement, employment agreement or other
similar agreements or employee benefit plan; provided that (A) the aggregate
price paid for all such repurchased, redeemed, acquired or retired Equity
Interests shall not exceed (1) $2.0 million in any calendar year (with unused
amounts in any calendar year being carried over to succeeding calendar years
subject to a maximum (without giving effect to clause (2)) of $5.0 million,
plus (2) in the case of a repurchase, redemption or other acquisition or
retirement of Equity Interests of the
 
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<PAGE>
 
Company, the aggregate cash proceeds received by the Company during such
calendar year from any reissuance of Equity Interests by or the Company to
employees, officers and directors of the Company and its Restricted
Subsidiaries plus the cash proceeds of any "key man" life insurance policy
received by the Company with respect to the owner of, and any cash proceeds
paid to the Company in connection with the issuance or exercise of, any
management or employee Equity Interests so acquired plus (3) in the case of a
repurchase, redemption or other acquisition or retirement of Equity Interests
of a Subsidiary Guarantor, the aggregate cash proceeds received by such
Subsidiary Guarantor during such calendar year from any reissuance of Equity
Interests of such Subsidiary Guarantor to employees, officers, and directors
of such Subsidiary Guarantor plus the cash proceeds of any "key man" life
insurance policy received by such Subsidiary Guarantor with respect to the
owner of any cash proceeds paid to such Subsidiary Guarantor in connection
with the issuance or exercise of, any management or employee Equity Interests
so acquired, and (B) no Default or Event of Default shall have occurred and be
continuing immediately after such transaction; provided, further that the
aggregate cash proceeds referred to in (2) above shall be excluded from clause
(c)(ii) of the preceding paragraph; (vi) any Investment to the extent that the
consideration therefor consists of the net cash proceeds of the substantially
concurrent issue and sale (other than to a Restricted Subsidiary) of Equity
Interests of the Company (other than any Disqualified Stock); (vii) so long as
no Default or Event of Default has occurred and is continuing and the Company
can incur at least $1.00 of additional indebtedness pursuant to the Fixed
Charge Coverage Ratio test set forth in the first paragraph of the covenant
described below under caption "--Incurrence of Indebtedness and Issuance of
Disqualified Stock," the declaration and payment of dividends to holders of
any class or series of Disqualified Stock of the Company, or any Subsidiary
Guarantor issued after the date of the Indenture in accordance with the
covenant described below under the caption "Incurrence of Indebtedness and
Issuance of Disqualified Stock;" (viii) repurchase of Equity Interests deemed
to occur upon exercise of stock options if such Equity Interests represent a
portion of the exercise price of such options; (ix) loans to employees of the
Company or any Subsidiary Guarantor not to exceed $2.0 million at any one time
outstanding; (x) Restricted Payments not to exceed $5.0 million since the date
of the Indenture and (xi) payments made pursuant to the Merger Agreement and
tax "gross up" payments made pursuant to the Stockholders Agreement in
connection with the Recapitalization, in each case, as in effect on the date
of the Indenture, as the same may be amended, modified or replaced from time
to time so long as such amendment, modification or replacement does not
increase the amount of any such payments from the amount of such payments
provided for in the Merger Agreement or Stockholders Agreement, as the case
may be, as in effect on the date of the Indenture.
 
  The Board of Directors may designate any Restricted Subsidiary to be an
Unrestricted Subsidiary if such designation would not cause a Default. For
purposes of making such determination, all outstanding Investments by the
Company and its Restricted Subsidiaries (except to the extent repaid in cash)
in the Subsidiary so designated will be deemed to be Restricted Payments at
the time of such designation and will reduce the amount available for
Restricted Payments under the first paragraph of this covenant. All such
outstanding Investments will be deemed to constitute Investments in an amount
equal to the fair market value of such Investments at the time of such
designation. Such designation will only be permitted if such Restricted
Payment would be permitted at such time and if such Restricted Subsidiary
otherwise meets the definition of an Unrestricted Subsidiary.
 
  For purposes of determining compliance with this covenant, in the event that
a Restricted Payment meets the criteria of more than one of the exceptions
described in (i) through (x) above or is entitled to be made pursuant to the
first paragraph of this covenant, the Company shall, in its sole discretion,
classify such Restricted Payment in any manner that complies with the
covenant. The amount of all Restricted Payments (other than cash) shall be the
fair market value on the date of the Restricted Payment of the asset(s) or
securities proposed to be transferred or issued by the Company or such
Restricted Subsidiary, as the case may be, pursuant to the Restricted Payment.
The fair market value of any non-cash Restricted Payment or return of capital
on any Restricted Subsidiary shall be determined by the Board of Directors
whose resolution with respect thereto shall be delivered to the Trustee, such
determination to be based upon an opinion or appraisal issued by an
accounting, appraisal or investment banking firm of national standing if such
fair market value exceeds $7.5 million. Not later than the date of making any
Restricted Payment, the Company shall deliver to the Trustee an Officers'
Certificate stating that such Restricted Payment is permitted and setting
forth the basis upon which the
 
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<PAGE>
 
calculations required by the covenant "Restricted Payments" were computed,
together with a copy of any fairness opinion or appraisal required by the
Indenture.
 
 Incurrence of Indebtedness and Issuance of Disqualified Stock
 
  The Indenture provides that the Company will not, and will not permit any of
its Subsidiaries to, directly or indirectly, create, incur, issue, assume,
guarantee or otherwise become directly or indirectly liable, contingently or
otherwise, with respect to (collectively, "incur") any Indebtedness (including
Acquired Debt) and that the Company will not issue any Disqualified Stock and
will not permit any of its Subsidiaries to issue any shares of preferred
stock; provided, however, that the Company may incur Indebtedness (including
Acquired Debt) or issue shares of Disqualified Stock and the Company's
Subsidiaries may incur Indebtedness or issue preferred equity if the Fixed
Charge Coverage Ratio for the Company's most recently ended four full fiscal
quarters for which internal financial statements are available immediately
preceding the date on which such additional Indebtedness is incurred or such
Disqualified Stock is issued would have been at least 2.0 to 1, determined on
a pro forma basis (including a pro forma application of the net proceeds
therefrom), as if the additional Indebtedness had been incurred, or the
Disqualified Stock had been issued, as the case may be, at the beginning of
such four-quarter period.
  The provisions of the first paragraph of this covenant will not apply to the
incurrence of any of the following items of Indebtedness (collectively,
"Permitted Debt"):
 
    (i) the incurrence by the Company and the Subsidiary Guarantors of term
  Indebtedness under the New Credit Facility (including any guarantee thereof
  by any Subsidiary Guarantor); provided that the aggregate principal amount
  of all term Indebtedness outstanding under the New Credit Facility after
  giving effect to such incurrence does not exceed an amount equal to $55.0
  million plus (in the case of any refinancing thereof) the aggregate amount
  of fees, underwriting discounts, premiums and other costs and expenses
  incurred in connection with such refinancing less the aggregate amount of
  all scheduled or mandatory repayments of the principal of any term
  Indebtedness under the New Credit Facility (other than repayments that are
  immediately reborrowed) that have been made since the date of the
  Indenture;
 
    (ii) the incurrence by the Company and the Subsidiary Guarantors of
  Indebtedness and reimbursement obligations in respect of letters of credit
  under Credit Facilities (including any guarantee thereof by any Subsidiary
  Guarantor); provided that the aggregate principal amount of all revolving
  credit or other Indebtedness (other than term Indebtedness permitted under
  clause (i) above) (with letters of credit being deemed to have a principal
  amount equal to the maximum face amount thereunder) outstanding under all
  Credit Facilities after giving effect to such incurrence does not exceed an
  amount equal to $55.0 million;
 
    (iii) the incurrence by the Company and its Restricted Subsidiaries of
  the Existing Indebtedness;
 
    (iv) the incurrence by the Company of Indebtedness represented by the
  Notes sold in the Offering and the incurrence by the Subsidiary Guarantors
  of Indebtedness represented by the Subsidiary Guarantees of such Notes;
 
    (v) the incurrence by the Company or any of its Restricted Subsidiaries
  of Indebtedness represented by Capital Lease Obligations, mortgage or
  construction financings or purchase money obligations or similar
  financings, in each case incurred for the purpose of financing all or any
  part of the purchase price or cost of construction or improvement of
  property, plant or equipment used in the business of the Company or such
  Restricted Subsidiary, in an aggregate principal amount not to exceed $20.0
  million at any time outstanding;
 
    (vi) the incurrence by the Company or any of its Restricted Subsidiaries
  of Permitted Refinancing Indebtedness in exchange for, or the net proceeds
  of which are used to refund, refinance or replace Indebtedness (other than
  intercompany Indebtedness) that was permitted by the Indenture to be
  incurred under the first paragraph hereof or clauses (iii), (iv), (v), (vi)
  or (ix) of this paragraph;
 
    (vii) the incurrence by the Company or any of its Restricted Subsidiaries
  of intercompany Indebtedness between or among the Company and any of its
  Restricted Subsidiaries; provided, however, that (i) if the Company is the
  obligor on such Indebtedness, such Indebtedness is expressly subordinated
  to the prior payment in full in cash of all Obligations with respect to the
  Notes and (ii)(A) any subsequent issuance or
 
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<PAGE>
 
  transfer of Equity Interests that results in any such Indebtedness being
  held by a Person other than the Company or a Restricted Subsidiary thereof
  and (B) any sale or other transfer of any such Indebtedness to a Person
  that is not either the Company or a Restricted Subsidiary thereof shall be
  deemed, in each case, to constitute an incurrence of such Indebtedness by
  the Company or such Restricted Subsidiary, as the case may be, that was not
  permitted by this clause (vii);
 
    (viii) the incurrence by the Company or any of its Restricted
  Subsidiaries of Hedging Obligations that are incurred for the purpose of
  fixing or hedging (i) interest rate risk with respect to any floating rate
  Indebtedness that is permitted by the terms of this Indenture to be
  outstanding, (ii) the value of foreign currencies purchased or received by
  the Company or any Restricted Subsidiary in the ordinary course of business
  as conducted by the Company or (iii) commodity risk relating to commodity
  agreements to the extent entered into in the ordinary course of business
  solely to protect the Company and its Restricted Subsidiaries from
  fluctuations in the prices of raw materials used in its business;
 
    (ix) the incurrence by the Company or any of its Restricted Subsidiaries
  of Indebtedness (in addition to Indebtedness permitted by other clauses of
  this paragraph) in an aggregate principal amount (or accreted value, as
  applicable) at any time outstanding, including all Permitted Refinancing
  Indebtedness incurred to refund, refinance or replace any Indebtedness
  incurred pursuant to this clause (ix), not to exceed $25.0 million;
 
    (x) the incurrence by the Company's Unrestricted Subsidiaries of Non-
  Recourse Debt, provided, however, that if any such Indebtedness ceases to
  be Non-Recourse Debt of an Unrestricted Subsidiary, such event shall be
  deemed to constitute an incurrence of Indebtedness by a Restricted
  Subsidiary of the Company that was not permitted by this clause (x);
 
    (xi) the Guarantee by the Company or any of the Subsidiary Guarantors of
  Indebtedness of the Company or a Subsidiary Guarantor, which Indebtedness
  was permitted to be incurred by another provision of this covenant;
 
    (xii) Indebtedness of the Company or a Restricted Subsidiary owed to
  (including obligations in respect of letters of credit for the benefit of)
  any Person in connection with worker's compensation, health, disability or
  other employee benefits or property, casualty or liability insurance
  provided by such Person to the Company or such Restricted Subsidiary,
  pursuant to reimbursement or indemnification obligations to such Person, in
  each case incurred in the ordinary course of business and consistent with
  past practices;
 
    (xiii) the incurrence of Permitted Bonding Obligations;
 
    (xiv) the issuance of preferred stock (other than Disqualified Stock) by
  any Subsidiary Guarantor to members of management of such Subsidiary
  Guarantor, provided that such preferred stock does not require the Company
  or any Restricted Subsidiary to pay dividends thereon other than in shares
  of additional preferred stock (other than Disqualified Stock); and
 
    (xv) the incurrence of Indebtedness arising from agreements of the
  Company or any Restricted Subsidiary providing for indemnification,
  adjustment of purchase price or similar obligations, in each case, incurred
  or assumed in connection with the disposition of any business, assets or
  Capital Stock of a Restricted Subsidiary; provided that the maximum
  aggregate liability of such Indebtedness shall at no time exceed the gross
  proceeds actually received by the Company and its Restricted Subsidiaries
  in connection with any such disposition.
 
  For purposes of determining compliance with this covenant, in the event that
an item of Indebtedness meets the criteria of more than one of the categories
of Permitted Debt described in clauses (i) through (xv) above or is entitled
to be incurred pursuant to the first paragraph of this covenant, the Company
shall, in its sole discretion, classify such item of Indebtedness in any
manner that complies with this covenant. Accrual of interest, accretion or
amortization of original issue discount, the payment of interest on any
Indebtedness in the form of additional Indebtedness with the same terms, and
the payment of dividends on Disqualified Stock in the form of additional
shares of the same class of Disqualified Stock will not be deemed to be an
incurrence of Indebtedness or an
 
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<PAGE>
 
issuance of Disqualified Stock for purposes of this covenant; provided, in
each such case, that the amount thereof is included in Fixed Charges of the
Company as accrued.
 
 No Senior Subordinated Debt
 
  The Indenture provides that (i) the Company will not incur, create, issue,
assume, guarantee or otherwise become liable for any Indebtedness that is
subordinate or junior in right of payment to any Indebtedness and senior in
any respect in right of payment to the Notes, and (ii) no Subsidiary Guarantor
will incur, create, issue, assume, guarantee or otherwise become liable for
any Indebtedness that is subordinate or junior in right of payment to any
Indebtedness of such Subsidiary Guarantor and senior in any respect in right
of payment to the Subsidiary Guarantee of such Subsidiary Guarantor; provided
that no Indebtedness will be deemed subordinate or junior in right of payment
to any other Indebtedness solely by reason of the fact that such Indebtedness
is unsecured.
 
 Liens
 
  The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, directly or indirectly, create, incur, assume
or suffer to exist any Lien securing Indebtedness or trade payables on any
asset now owned or hereafter acquired, or any income or profits therefrom or
assign or convey any right to receive income therefrom, except (i) Permitted
Liens, and (ii) in the case of Liens securing Indebtedness that is expressly
subordinate or junior in right of payment to the Notes, the Notes are secured
by a Lien on such property, assets or proceeds that is senior in priority to
such Liens (with the same relative priority as such subordinate or junior
Indebtedness shall have with respect to the Notes and the Subsidiary
Guarantees) and (y) in all other cases, the Notes are secured by such Lien on
an equal and ratable basis.
 
 Dividend and Other Payment Restrictions Affecting Subsidiaries
 
  The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, directly or indirectly, create or otherwise
cause or suffer to exist or become effective any encumbrance or restriction on
the ability of any Restricted Subsidiary to (i)(a) pay dividends or make any
other distributions to the Company or any of its Restricted Subsidiaries (1)
on its Capital Stock or (2) with respect to any other interest or
participation in, or measured by, its profits, or (b) pay any indebtedness
owed to the Company or any of its Restricted Subsidiaries, (ii) make loans or
advances to the Company or any of its Restricted Subsidiaries or (iii)
transfer any of its properties or assets to the Company or any of its
Restricted Subsidiaries. However, the foregoing restrictions will not apply to
encumbrances or restrictions existing under or by reason of (a) Existing
Indebtedness as in effect on the date of the Indenture, (b) the New Credit
Facility and Permitted Bonding Obligations as in effect as of the date of the
Indenture, and any amendments, modifications, restatements, renewals,
increases, supplements, refundings, replacements or refinancings thereof,
provided that such amendments, modifications, restatements, renewals,
increases, supplements, refundings, replacement or refinancings are not
materially more restrictive, taken as a whole, with respect to such dividend
and other payment restrictions than those contained in the New Credit Facility
or in agreements with respect to Permitted Bonding Obligations, as applicable,
as in effect on the date of the Indenture, (c) the Indenture, the Notes and
the Subsidiary Guarantees, (d) applicable law, (e) any instrument governing
Indebtedness or Capital Stock of a Person acquired by the Company or any of
its Restricted Subsidiaries as in effect at the time of such acquisition
(except to the extent such Indebtedness was incurred in connection with or in
contemplation of such acquisition), which encumbrance or restriction is not
applicable to any Person, or the properties or assets of any Person, other
than the Person, or the property or assets of the Person, so acquired,
provided that, in the case of Indebtedness, such Indebtedness was permitted by
the terms of the Indenture to be incurred, (f) customary non-assignment
provisions in leases or other similar agreements entered into in the ordinary
course of business and consistent with past practices, (g) purchase money
obligations for property acquired in the ordinary course of business that
impose restrictions of the nature described in clause (iii) above on the
property so acquired, (h) any agreement for the sale of a Restricted
Subsidiary that restricts distributions by that Restricted Subsidiary pending
its sale, (i) Permitted Refinancing Indebtedness, provided that the
restrictions contained in the agreements governing such
 
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Permitted Refinancing Indebtedness are not materially more restrictive, taken
as a whole, than those contained in the agreements governing the Indebtedness
being refinanced, (j) secured Indebtedness otherwise permitted to be incurred
pursuant to the provisions of the covenant described above under the caption
"--Liens" that limits the right of the debtor to dispose of the assets
securing such Indebtedness, (k) provisions with respect to the disposition or
distribution of assets or property in joint venture agreements and other
similar agreements entered into in the ordinary course of business, (l)
restrictions on cash or other deposits or net worth imposed by customers under
contracts entered into in the ordinary course of business, (m) mortgage or
construction financing that imposes restrictions on the transfer of the
property acquired or improved, (n) encumbrances or restrictions imposed by
amendments to the contracts, agreements or obligations referred to in the
foregoing clauses (a), (c), (e), (f), (g), (h), (j), (k) and (n), provided
that such amendments are not materially more restrictive than the agreement so
amended; and (o) protective liens filed in connection with sale-leaseback
transactions permitted under the caption "--Sale and Leaseback Transactions."
 
 Merger, Consolidation, or Sale of Assets
 
  The Indenture provides that the Company may not consolidate or merge with or
into (whether or not the Company is the surviving corporation), or sell,
assign, transfer, convey or otherwise dispose of all or substantially all of
its properties or assets in one or more related transactions, to another
Person unless (i) the Company is the surviving corporation or the entity or
the Person formed by or surviving any such consolidation or merger (if other
than the Company) or to which such sale, assignment, transfer, lease,
conveyance or other disposition shall have been made is a corporation or other
entity organized or existing under the laws of the United States, any state
thereof or the District of Columbia; (ii) the entity or Person formed by or
surviving any such consolidation or merger (if other than the Company) or the
entity or Person to which such sale, assignment, transfer, lease, conveyance
or other disposition shall have been made assumes all the then existing
obligations of the Company under the Registration Rights Agreement, the Notes
and the Indenture pursuant to a supplemental indenture in a form reasonably
satisfactory to the Trustee; (iii) immediately after such transaction no
Default or Event of Default exists; and (iv) except in the case of a merger of
the Company with or into a Wholly Owned Subsidiary of the Company, the Company
or the Person formed by or surviving any such consolidation or merger (if
other than the Company), or to which such sale, assignment, transfer, lease,
conveyance or other disposition shall have been made will, at the time of such
transaction and after giving pro forma effect thereto as if such transaction
had occurred at the beginning of the applicable four-quarter period, be
permitted to incur at least $1.00 of additional Indebtedness pursuant to the
Fixed Charge Coverage Ratio test set forth in the first paragraph of the
covenant described above under the caption "--Incurrence of Indebtedness and
Issuance of Disqualified Stock." The Indenture will provide that the Company
will not, directly or indirectly, lease all or substantially all of its
properties or assets to any Person.
 
 Transactions with Affiliates
 
  The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, make any payment to, or sell, lease, transfer
or otherwise dispose of any of its properties or assets to, or purchase any
property or assets from, or enter into or make or amend any transaction,
contract, agreement, understanding, loan, advance or guarantee with, or for
the benefit of, any Affiliate (each of the foregoing, an "Affiliate
Transaction"), unless (i) such Affiliate Transaction is on terms that are no
less favorable to the Company or the relevant Restricted Subsidiary than those
that would have been obtained in a comparable transaction by the Company or
such Restricted Subsidiary with an unrelated Person and (ii) the Company
delivers to the Trustee (a) with respect to any Affiliate Transaction or
series of related Affiliate Transactions involving aggregate consideration in
excess of $2.0 million, a resolution of the Board of Directors of the Company
set forth in an Officers' Certificate certifying that such Affiliate
Transaction complies with clause (i) above and that such Affiliate Transaction
has been approved by a majority of the disinterested members of the Board of
Directors of the Company and (b) with respect to any Affiliate Transaction or
series of related Affiliate Transactions involving aggregate consideration in
excess of $7.5 million, an opinion as to the fairness to the Holders of such
Affiliate Transaction from a financial point of view issued by an accounting,
appraisal or investment banking firm of national standing. Notwithstanding the
foregoing, the following items shall not be deemed to be Affiliate
 
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<PAGE>
 
Transactions: (i) any employment agreement, compensation, employee benefit
arrangements and incentive arrangements or indemnification agreement or
arrangement with any officer, director, member or employee entered into by the
Company or any of its Restricted Subsidiaries in the ordinary course of
business of the Company or such Restricted Subsidiary, (ii) transactions
between or among the Company and/or its Restricted Subsidiaries, (iii) payment
of reasonable directors fees, (iv) Restricted Payments (other than Restricted
Investments) that are permitted by the provisions of the Indenture described
above under the caption "--Restricted Payments," (v) loans and advances to
officers, directors and employees of the Company or any Restricted Subsidiary
for travel, entertainment, moving and other relocation expenses, in each case
made in the ordinary course of business; (vi) transactions pursuant to the
Stockholders' Agreement and the Merger Agreement, in each case, as in effect
on the date of the Indenture as the same may be amended, modified or replaced
from time to time so long as such amendment, modification or replacement is no
less favorable to the Company and its Restricted Subsidiaries, taken as a
whole, than the Stockholders' Agreement or the Merger Agreement, as the case
may be, as in effect on the date of the Indenture.
 
 Sale and Leaseback Transactions
 
  The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, enter into any sale and leaseback transaction;
provided that the Company or any of its Restricted Subsidiaries may enter into
a sale and leaseback transaction if (i) the Company or such Restricted
Subsidiary could have (a) incurred Indebtedness in an amount equal to the
Attributable Debt relating to such sale and leaseback transaction pursuant to
the covenant described above under the caption "--Incurrence of Additional
Indebtedness and Issuance of Disqualified Stock" and (b) incurred a Lien to
secure such Indebtedness pursuant to the covenant described above under the
caption "--Liens," (ii) the gross cash proceeds of such sale and leaseback
transaction are at least equal to the fair market value (as determined in good
faith by the Board of Directors of the Company and set forth in an Officers'
Certificate delivered to the Trustee) of the property that is the subject of
such sale and leaseback transaction and (iii) the transfer of assets in such
sale and leaseback transaction is permitted by, and if applicable, the Company
applies the proceeds of such transaction in compliance with, the covenant
described above under the caption "--Asset Sales." Notwithstanding the
foregoing, this covenant shall not apply to the sale and leaseback of (i) the
backhoe dredge "New York" under construction on the date of the Indenture or
(ii) the dredging assets acquired from T.L. James & Company, Inc. pursuant to
the acquisition agreement in effect on the date of the Indenture, as such
agreement is in effect on such date, in the case of clauses (i) and (ii),
within 120 days of the date of completion of such construction or acquisition
of such assets, as applicable.
 
 Business Activities
 
  The Company will not, and will not permit any Restricted Subsidiary to,
engage in any business other than Permitted Businesses, except to such extent
as would not be material to the Company and its Restricted Subsidiaries taken
as a whole.
 
 Payments for Consent
 
  The Indenture provides that neither the Company nor any of its Restricted
Subsidiaries will, directly or indirectly, pay or cause to be paid any
consideration, whether by way of interest, fee or otherwise, to any Holder of
any Notes for or as an inducement to any consent, waiver or amendment of any
of the terms or provisions of the Indenture or the Notes unless such
consideration is offered to be paid or is paid to all Holders of the Notes
that consent, waive or agree to amend in the time frame set forth in the
solicitation documents relating to such consent, waiver or agreement.
 
 Additional Subsidiary Guarantees
 
  The Indenture provides that if the Company or any of its Restricted
Subsidiaries shall acquire or create another domestic Subsidiary after the
date of the Indenture, then, unless such Subsidiary is properly designated as
an Unrestricted Subsidiary, such newly acquired or created Subsidiary shall
become a Subsidiary Guarantor
 
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<PAGE>
 
and execute a Supplemental Indenture and deliver an opinion of counsel, in
accordance with the terms of the Indenture.
 
 Limitations on Issuances of Guarantees of Indebtedness
 
  The Indenture provides that the Company will not permit any Restricted
Subsidiary, directly or indirectly, to Guarantee any other Indebtedness of the
Company or a Subsidiary Guarantor unless, if such Restricted Subsidiary is not
a Guarantor, such Restricted Subsidiary simultaneously executes and delivers a
supplemental indenture to the Indenture providing for the Guarantee of the
payment of the Notes by such Restricted Subsidiary, which Guarantee shall be
senior to or pari passu with such Subsidiary's Guarantee of such other
Indebtedness unless such other Indebtedness is Senior Debt, in which case the
Guarantee of the Notes may be subordinated to the Guarantee of such Senior
Debt to the same extent as the Notes are subordinated to such Senior Debt.
Notwithstanding the foregoing, any such Subsidiary Guarantee shall provide by
its terms that it shall be automatically and unconditionally released and
discharged upon any sale, exchange or transfer, to any Person not an Affiliate
of the Company, of all of the Company's stock in, or all or substantially all
the assets of, such Restricted Subsidiary, which sale, exchange or transfer is
made in compliance with the applicable provisions of the Indenture. The form
of such Subsidiary Guarantee attached as an exhibit to the Indenture.
 
REPORTS
 
  The Indenture provides that, whether or not required by the rules and
regulations of the Securities and Exchange Commission (the "Commission"), so
long as any Notes are outstanding, the Company will furnish to the Holders of
Notes (i) all quarterly financial information beginning with the quarter ended
September 30, 1998 and annual financial information that would be required to
be contained in a filing with the Commission on Forms 10-Q and 10-K if the
Company was required to file such Forms, including a "Management's Discussion
and Analysis of Financial Condition and Results of Operations" that describes
the financial condition and results of operations of the Company and its
consolidated Subsidiaries (showing in reasonable detail, either on the face of
the financial statements or in the footnotes thereto and in Management's
Discussion and Analysis of Financial Condition and Results of Operations, the
financial condition and results of operations of the Company and its
Restricted Subsidiaries separate from the financial condition and results of
operations of the Unrestricted Subsidiaries of the Company) and, with respect
to the annual information only, a report thereon by the Company's certified
independent accountants and (ii) all current reports that would be required to
be filed with the Commission on Form 8-K if the Company were required to file
such reports, in each case within the time periods specified in the
Commission's rules and regulations. In addition, following the consummation of
the exchange offer contemplated by the Registration Rights Agreement, whether
or not required by the rules and regulations of the Commission, the Company
will file a copy of all such information and reports with the Commission for
public availability within the time periods specified in the Commission's
rules and regulations (unless the Commission will not accept such a filing)
and make such information available to securities analysts and prospective
investors upon request. In addition, (i) at all times the Commission does not
accept the filings provided for in the preceding sentence or (ii) such filings
provided for in the preceding sentence do not contain the information required
to be delivered upon request pursuant to Rule 144A(d)(4) under the Securities
Act, then, in each case, the Company has agreed that, for so long as any Notes
remain outstanding, it will furnish to the Holders and to securities analysts
and prospective investors, upon their request, the information required to be
delivered pursuant to Rule 144A(d)(4) under the Securities Act.
 
EVENTS OF DEFAULT AND REMEDIES
 
  The Indenture provides that each of the following constitutes an Event of
Default: (i) default for 30 days in the payment when due of interest on, or
Liquidated Damages with respect to, the Notes (whether or not permitted by the
subordination provisions of the Indenture); (ii) default in payment when due
of the principal of or premium, if any, on the Notes (whether or not permitted
by the subordination provisions of the Indenture); (iii) failure by the
Company or any of its Restricted Subsidiaries to comply with the provisions
described under the caption "--Change of Control;" (iv) failure by the Company
or any of its Restricted Subsidiaries for 60 days
 
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<PAGE>
 
after notice by the Trustee or by the Holders of at least 25% in principal
amount of Notes then outstanding to comply with any of its other agreements in
the Indenture or the Notes; (v) default under any mortgage, indenture or
instrument under which there may be issued or by which there may be secured or
evidenced any Indebtedness for money borrowed by the Company or any of its
Restricted Subsidiaries (or the payment of which is guaranteed by the Company
or any of its Restricted Subsidiaries) whether such Indebtedness or guarantee
now exists, or is created after the date of the Indenture, which default (a)
is caused by a failure to pay principal of or premium, if any, or interest on
such Indebtedness prior to the expiration of the grace period provided in such
Indebtedness on the date of such default (a "Payment Default") or (b) results
in the acceleration of such Indebtedness prior to its stated maturity and, in
each case, the principal amount of any such Indebtedness, together with the
principal amount of any other such Indebtedness under which there has been a
Payment Default or the maturity of which has been so accelerated (after giving
effect to any applicable grace period), aggregates $10.0 million or more; (vi)
failure by the Company or any of its Restricted Subsidiaries to pay final
judgments aggregating in excess of $10.0 million (net of any amount with
respect to which a reputable insurance company with assets over $100.0 million
has acknowledged liability in writing), which judgments are not paid,
discharged or stayed for a period of 60 days after their entry; (vii) certain
events of bankruptcy or insolvency with respect to the Company or any of its
Subsidiaries and (viii) except as permitted by the Indenture, any Subsidiary
Guarantee shall be held in any judicial proceeding to be unenforceable or
invalid or shall cease for any reason to be in full force and effect or any
Subsidiary Guarantor, or any Person acting on behalf of any Subsidiary
Guarantor, shall deny or disaffirm its obligations under its Subsidiary
Guarantee.
 
  If any Event of Default occurs and is continuing, the Trustee or the Holders
of at least 25% in principal amount of the then outstanding Notes may declare
all the Notes to be due and payable immediately. Notwithstanding the
foregoing, in the case of an Event of Default arising from certain events of
bankruptcy or insolvency, with respect to the Company, any Significant
Subsidiary or any group of Subsidiaries that, taken together, would constitute
a Significant Subsidiary, all outstanding Notes will become due and payable
without further action or notice. Holders of the Notes may not enforce the
Indenture or the Notes except as provided in the Indenture. Subject to certain
limitations, Holders of a majority in principal amount of the then outstanding
Notes may direct the Trustee in its exercise of any trust or power. The
Trustee may withhold from Holders of the Notes notice of any continuing
Default or Event of Default (except a Default or Event of Default relating to
the payment of principal or interest) if it determines that withholding notice
is in their interest.
 
  The Holders of a majority in aggregate principal amount of the Notes then
outstanding by notice to the Trustee may on behalf of the Holders of all of
the Notes waive any existing Default or Event of Default and its consequences
under the Indenture except a continuing Default or Event of Default in the
payment of interest on, or the principal of, the Notes.
 
  The Company is required to deliver to the Trustee annually a statement
regarding compliance with the Indenture, and the Company is required upon
becoming aware of any Default or Event of Default, to deliver to the Trustee a
statement specifying such Default or Event of Default.
 
NO PERSONAL LIABILITY OF DIRECTORS, OFFICERS, EMPLOYEES AND STOCKHOLDERS
 
  No director, officer, employee, incorporator or stockholder of the Company,
as such, shall have any liability for any obligations of the Company under the
Notes, the Indenture or the Subsidiary Guarantees or for any claim based on,
in respect of, or by reason of, such obligations or their creation. Each
Holder of Notes by accepting a Note waives and releases all such liability.
The waiver and release are part of the consideration for issuance of the
Notes. Such waiver may not be effective to waive liabilities under the federal
securities laws and it is the view of the Commission that such a waiver is
against public policy.
 
LEGAL DEFEASANCE AND COVENANT DEFEASANCE
 
  The Company may, at its option and at any time, elect to have all of its
obligations and the obligations of the Subsidiary Guarantors discharged with
respect to the outstanding Notes ("Legal Defeasance") except for (i)
 
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<PAGE>
 
the rights of Holders of outstanding Notes to receive payments in respect of
the principal of, premium and Liquidated Damages, if any, and interest on such
Notes when such payments are due from the trust referred to below, (ii) the
Company's obligations with respect to the Notes concerning issuing temporary
Notes, registration of Notes, mutilated, destroyed, lost or stolen Notes and
the maintenance of an office or agency for payment and money for security
payments held in trust, (iii) the rights, powers, trusts, duties and
immunities of the Trustee, and the Company's obligations in connection
therewith and (iv) the Legal Defeasance provisions of the Indenture. In
addition, the Company may, at its option and at any time, elect to have the
obligations of the Company released with respect to certain covenants that are
described in the Indenture ("Covenant Defeasance") and thereafter any omission
to comply with such obligations shall not constitute a Default or Event of
Default with respect to the Notes. In the event Covenant Defeasance occurs,
certain events (not including non-payment, bankruptcy, receivership,
rehabilitation and insolvency events) described under "Events of Default &
Remedies" will no longer constitute an Event of Default with respect to the
Notes.
 
  In order to exercise either Legal Defeasance or Covenant Defeasance, (i) the
Company must irrevocably deposit with the Trustee, in trust, for the benefit
of the Holders of the Notes, cash in U.S. dollars, non-callable Government
Securities, or a combination thereof, in such amounts as will be sufficient,
in the opinion of a nationally recognized firm of independent public
accountants, to pay the principal of, premium, if any, and interest and
Liquidated Damages on the outstanding Notes on the stated maturity or on the
applicable redemption date, as the case may be, and the Company must specify
whether the Notes are being defeased to maturity or to a particular redemption
date; (ii) in the case of Legal Defeasance, the Company shall have delivered
to the Trustee an opinion of counsel in the United States reasonably
acceptable to the Trustee confirming that (A) the Company has received from,
or there has been published by, the Internal Revenue Service a ruling or (B)
since the date of the Indenture, there has been a change in the applicable
federal income tax law, in either case to the effect that, and based thereon
such opinion of counsel shall confirm that, subject to customary assumptions
and exceptions, the Holders of the outstanding Notes will not recognize
income, gain or loss for federal income tax purposes as a result of such Legal
Defeasance and will be subject to federal income tax on the same amounts, in
the same manner and at the same times as would have been the case if such
Legal Defeasance had not occurred; (iii) in the case of Covenant Defeasance,
the Company shall have delivered to the Trustee an opinion of counsel in the
United States reasonably acceptable to the Trustee confirming that, subject to
customary assumptions and exceptions, the Holders of the outstanding Notes
will not recognize income, gain or loss for federal income tax purposes as a
result of such Covenant Defeasance and will be subject to federal income tax
on the same amounts, in the same manner and at the same times as would have
been the case if such Covenant Defeasance had not occurred; (iv) no Default or
Event of Default shall have occurred and be continuing on the date of such
deposit (other than a Default or Event of Default resulting from the borrowing
of funds to be applied to such deposit) or insofar as Events of Default from
bankruptcy or insolvency events are concerned, at any time in the period
ending on the 91st day after the date of deposit; (v) such Legal Defeasance or
Covenant Defeasance will not result in a breach or violation of, or constitute
a default under any material agreement or instrument (other than the
Indenture) to which the Company or any of its Subsidiaries is a party or by
which the Company or any of its Subsidiaries is bound; (vi) the Company must
have delivered to the Trustee an opinion of counsel to the effect that,
subject to customary assumptions and exceptions, after the 91st day following
the deposit, the trust funds will not be subject to the effect of any
applicable bankruptcy, insolvency, reorganization or similar laws affecting
creditors' rights generally; (vii) the Company must deliver to the Trustee an
Officers' Certificate stating that the deposit was not made by the Company
with the intent of preferring the Holders of Notes over the other creditors of
the Company with the intent of defeating, hindering, delaying or defrauding
creditors of the Company or others; and (viii) the Company must deliver to the
Trustee an Officers' Certificate and an opinion of counsel, each stating that
all conditions precedent provided for relating to the Legal Defeasance or the
Covenant Defeasance have been complied with.
 
TRANSFER AND EXCHANGE
 
  A Holder may transfer or exchange Notes in accordance with the Indenture.
The Registrar and the Trustee may require a Holder, among other things, to
furnish appropriate endorsements and transfer documents and the
 
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Company may require a Holder to pay any taxes and fees required by law or
permitted by the Indenture. The Company is not required to transfer or
exchange any Note selected for redemption. Also, the Company is not required
to transfer or exchange any Note for a period of 15 days before a selection of
Notes to be redeemed.
 
  The registered Holder of a Note will be treated as the owner of it for all
purposes.
 
AMENDMENT, SUPPLEMENT AND WAIVER
 
  Except as provided in the next two succeeding paragraphs, the Indenture, the
Subsidiary Guarantees or the Notes may be amended or supplemented with the
consent of the Holders of at least a majority in principal amount of the Notes
then outstanding (including, without limitation, consents obtained in
connection with a purchase of, or tender offer or exchange offer for, Notes),
and any existing default or compliance with any provision of the Indenture,
the Notes or the Subsidiary Guarantees may be waived with the consent of the
Holders of a majority in principal amount of the then outstanding Notes
(including, without limitation, consents obtained in connection with a
purchase of, or tender offer or exchange offer for, Notes).
 
  Without the consent of each Holder affected, an amendment or waiver may not
(with respect to any Notes held by a non-consenting Holder): (i) reduce the
principal amount of Notes whose Holders must consent to an amendment,
supplement or waiver, (ii) reduce the principal of or change the fixed
maturity of any Note or alter the provisions with respect to the redemption of
the Notes (other than provisions relating to the covenants described above
under the caption "--Repurchase at the Option of Holders"), (iii) reduce the
rate of or change the time for payment of interest on any Note, (iv) waive a
Default or Event of Default in the payment of principal of or premium, if any,
or interest on the Notes (except a rescission of acceleration of the Notes by
the Holders of at least a majority in aggregate principal amount of the Notes
and a waiver of the payment default that resulted from such acceleration), (v)
make any Note payable in money other than that stated in the Notes, (vi) make
any change in the provisions of the Indenture relating to waivers of past
Defaults or the rights of Holders of Notes to receive payments of principal of
or premium, if any, or interest on the Notes, (vii) waive a redemption payment
with respect to any Note (other than a payment required by one of the
covenants described above under the caption "--Repurchase at the Option of
Holders"), (viii) release any Subsidiary Guarantor from any of its obligations
under its Subsidiary Guarantee or the Indenture, except in accordance with the
terms of the Indenture, or (ix) make any change in the foregoing amendment and
waiver provisions. In addition, any amendment to the provisions of Article 10
and Section 11.02 of the Indenture (which relate to subordination) will
require the consent of the Holders of at least 75% in aggregate principal
amount of the Notes then outstanding if such amendment would adversely affect
the rights of Holders of the Notes.
 
  Notwithstanding the foregoing, without the consent of any Holder of Notes,
the Subsidiary Guarantors, the Company and the Trustee may amend or supplement
the Indenture, the Subsidiary Guarantees or the Notes to cure any ambiguity,
defect or inconsistency, to provide for uncertificated Notes in addition to or
in place of certificated Notes, to provide for the assumption of the Company's
or a Subsidiary Guarantor's obligations to Holders of Notes in the case of a
merger or consolidation or sale of all or substantially all of the Company's
assets, to provide for the issuance of Additional Notes in accordance with the
provisions set forth in the Indenture on the date of the Indenture, to make
any change that would provide any additional rights or benefits to the Holders
of Notes or that does not adversely affect the legal rights under the
Indenture of any such Holder, or to comply with requirements of the Commission
in order to effect or maintain the qualification of the Indenture under the
Trust Indenture Act or to allow any Subsidiary Guarantor to guarantee the
Notes.
 
CONCERNING THE TRUSTEE
 
  The Indenture contains certain limitations on the rights of the Trustee,
should it become a creditor of the Company, to obtain payment of claims in
certain cases, or to realize on certain property received in respect of any
such claim as security or otherwise. The Trustee will be permitted to engage
in other transactions; however, if it acquires any conflicting interest it
must eliminate such conflict within 90 days, apply to the Commission for
permission to continue or resign.
 
                                      85
<PAGE>
 
  The Holders of a majority in principal amount of the then outstanding Notes
will have the right to direct the time, method and place of conducting any
proceeding for exercising any remedy available to the Trustee, subject to
certain exceptions. The Indenture provides that in case an Event of Default
shall occur (which shall not be cured), the Trustee will be required, in the
exercise of its power, to use the degree of care of a prudent man in the
conduct of his own affairs. Subject to such provisions, the Trustee will be
under no obligation to exercise any of its rights or powers under the
Indenture at the request of any Holder of Notes, unless such Holder shall have
offered to the Trustee security and indemnity satisfactory to it against any
loss, liability or expense.
 
BOOK-ENTRY, DELIVERY AND FORM
 
  The Exchange Notes will be in the form of a global note without interest
coupons (the "Global Note"). Upon issuance, the Global Note will be deposited
with the Trustee, as custodian for DTC, in New York, New York, and registered
in the name of DTC or its nominee, in each case for credit to the accounts of
DTC's Direct and Indirect Participants (as defined below).
 
  The Global Note may be transferred, in whole and not in part, only to
another nominee of DTC or to a successor of DTC or its nominee in certain
limited circumstances. Beneficial interests in the Global Note may be
exchanged for Notes in certificated form in certain limited circumstances. See
"--Transfer of Interests in Global Note for Certificated Notes."
 
  Initially, the Trustee will act as Paying Agent and Registrar. The Notes may
be presented for registration of transfer and exchange at the offices of the
Registrar.
 
DEPOSITARY PROCEDURES
 
  DTC has advised the Company that DTC is a limited-purpose trust company
created to hold securities for its participating organizations (collectively,
the "Direct Participants") and to facilitate the clearance and settlement of
transactions in those securities between Direct Participants through
electronic book-entry changes in accounts of Participants. The Direct
Participants include securities brokers and dealers (including the Initial
Purchasers), banks, trust companies, clearing corporations and certain other
organizations. Access to DTC's system is also available to other entities that
clear through or maintain a direct or indirect, custodial relationship with a
Direct Participant (collectively, the "Indirect Participants"). DTC may hold
securities beneficially owned by other persons only through the Direct
Participants or Indirect Participants and such other persons' ownership
interest and transfer of ownership interest will be recorded only on the
records of the Direct Participant and/or Indirect Participant, and not on the
records maintained by DTC.
 
  DTC has also advised the Company that, pursuant to DTC's procedures, (i)
upon deposit of the Global Note, DTC will credit the accounts of the Direct
Participants designated by the Initial Purchasers with portions of the
principal amount of the Global Notes allocated by the Initial Purchasers to
such Direct Participants, and (ii) DTC will maintain records of the ownership
interests of such Direct Participants in the Global Notes and the transfer of
ownership interests by and between Direct Participants. DTC will not maintain
records of the ownership interests of, or the transfer of ownership interests
by and between, Indirect Participants or other owners of beneficial interests
in the Global Notes. Direct Participants and Indirect Participants must
maintain their own records of the ownership interests of, and the transfer of
ownership interests by and between, Indirect Participants and other owners of
beneficial interests in the Global Notes.
 
  Investors in the Global Note may hold their interests therein directly
through DTC if they are Direct Participants in DTC or indirectly through
organizations that are Direct Participants in DTC.
 
  The laws of some states require that certain persons take physical delivery
in definitive, certificated form of securities that they own. This may limit
or curtail the ability to transfer beneficial interests in a Global Note to
such persons. Because DTC can act only on behalf of Direct Participants, which
in turn act on behalf of Indirect Participants and others, the ability of a
person having a beneficial interest in a Global Note to pledge such interest
 
                                      86
<PAGE>
 
to persons or entities that are not Direct Participants in DTC, or to
otherwise take actions in respect of such interests, may be affected by the
lack of physical certificates evidencing such interests. For certain other
restrictions on the transferability of the Notes see "--Transfers of Interests
in Global Notes for Certificated Notes."
 
  Except as described in "Transfers of Interests in Global Notes for
Certificated Notes," owners of beneficial interests in the Global Notes will
not have Notes registered in their names, will not receive physical delivery
of Notes in certificated form and will not be considered the registered owners
or holders thereof under the Indenture for any purpose.
 
  Under the terms of the Indenture, the Company, the Subsidiary Guarantors and
the Trustee will treat the persons in whose names the Notes are registered
(including Notes represented by the Global Note) as the owners thereof for the
purpose of receiving payments and for any and all other purposes whatsoever.
Payments in respect of the principal, premium, Liquidated Damages, if any, and
interest on the Global Note registered in the name of DTC or its nominee will
be payable by the Trustee to DTC or its nominee as the registered holder under
the Indenture. Consequently, neither the Company, the Trustee nor any agent of
the Company or the Trustee has or will have any responsibility or liability
for (i) any aspect of DTC's records or any Direct Participant's or Indirect
Participant's records relating to or payments made on account of beneficial
ownership interests in the Global Notes or for maintaining, supervising or
reviewing any of DTC's records or any Direct Participant's or Indirect
Participant's records relating to the beneficial ownership interests in any
Global Note or (ii) any other matter relating to the actions and practices of
DTC or any of its Direct Participants or Indirect Participants.
 
  DTC has advised the Company that its current payment practice (for payments
of principal, interest and the like) with respect to securities such as the
Notes is to credit the accounts of the relevant Direct Participants with such
payment on the payment date in amounts proportionate to such Direct
Participant's respective ownership interests in the Global Notes as shown on
DTC's records. Payments by Direct Participants and Indirect Participants to
the beneficial owners of the Notes will be governed by standing instructions
and customary practices between them and will not be the responsibility of
DTC, the Trustee, the Company or the Subsidiary Guarantors. Neither the
Company, the Subsidiary Guarantors nor the Trustee will be liable for any
delay by DTC or its Direct Participants or Indirect Participants in
identifying the beneficial owners of the Notes, and the Company and the
Trustee may conclusively rely on and will be protected in relying on
instructions from DTC or its nominee as the registered owner of the Notes for
all purposes.
 
  Interests in the Global Note are expected to be eligible to trade in DTC's
Same-Day Funds Settlement System and, therefore, transfers between Direct
Participants in DTC will be effected in accordance with DTC's procedures, and
will be settled in immediately available funds. Transfers between Indirect
Participants who hold an interest through a Direct Participant will be
effected in accordance with the procedures of such Direct Participant but
generally will settle in immediately available funds.
 
  DTC has advised the Company that it will take any action permitted to be
taken by a holder of Notes only at the direction of one or more Direct
Participants to whose account interests in the Global Notes are credited and
only in respect of such portion of the aggregate principal amount of the Notes
as to which such Direct Participant or Direct Participants has or have given
direction. However, if there is an Event of Default under the Notes, DTC
reserves the right to exchange Global Notes (without the direction of one or
more of its Direct Participants) for legended Notes in certificated form, and
to distribute such certificated forms of Notes to its Direct Participants. See
"--Transfers of Interests in Global Notes for Certificated Notes."
 
TRANSFERS OF INTERESTS IN THE GLOBAL NOTE FOR CERTIFICATED NOTES
 
  The entire Global Note may be exchanged for definitive Notes in registered,
certificated form without interest coupons ("Certificated Notes") if (i) DTC
(x) notifies the Company that it is unwilling or unable to continue as
depositary for the Global Note and the Company thereupon fails to appoint a
successor depositary within 90 days or (y) has ceased to be a clearing agency
registered under the Exchange Act, (ii) the Company, at
 
                                      87
<PAGE>
 
its option, notifies the Trustee in writing that it elects to cause the
issuance of Certificated Notes or (iii) there shall have occurred and be
continuing a Default or an Event of Default with respect to the Notes. In any
such case, the Company will notify the Trustee in writing that, upon surrender
by the Direct and Indirect Participants of their interest in the Global Note,
Certificated Notes will be issued to each person that such Direct and Indirect
Participants and DTC identify as being the beneficial owner of the related
Notes.
 
  Beneficial interests in the Global Note held by any Direct or Indirect
Participant may be exchanged for Certificated Notes upon request to DTC, by
such Direct Participant (for itself or on behalf of an Indirect Participant),
but only upon at least 20 days' prior written notice given to the Trustee by
or on behalf of DTC in accordance with customary DTC procedures. Certificated
Notes delivered in exchange for any beneficial interest in the Global Note
will be registered in the names, and issued in any approved denominations,
requested by DTC on behalf of such Direct or Indirect Participants (in
accordance with DTC's customary procedures).
 
  Neither the Company, the Subsidiary Guarantors nor the Trustee will be
liable for any delay by the holder of the Global Note or the DTC in
identifying the beneficial owners of Notes, and the Company and the Trustee
may conclusively rely on, and will be protected in relying on, instructions
from the holder of the Global Note or the DTC for all purposes.
 
SAME DAY SETTLEMENT AND PAYMENT
 
  The Indenture will require that payments in respect of the Notes represented
by the Global Note (including principal, premium, if any, interest and
Liquidated Damages, if any) be made by wire transfer of immediately available
funds to the accounts specified by the holder of such Global Note. With
respect to Certificated Notes, the Company will make all payments of
principal, premium, if any, interest and Liquidated Damages, if any, by wire
transfer of immediately available funds to the accounts specified by the
holders thereof or, if no such account is specified, by mailing a check to
each such holder's registered address. The Company expects that secondary
trading in the Certificated Notes will also be settled in immediately
available funds.
 
CERTAIN DEFINITIONS
 
  Set forth below are certain defined terms used in the Indenture. Reference
is made to the Indenture for a full disclosure of all such terms, as well as
any other capitalized terms used herein for which no definition is provided.
 
  "Acquired Debt" means, with respect to any specified Person, (i)
Indebtedness of any other Person existing at the time such other Person is
merged with or into or became a Subsidiary of such specified Person,
including, without limitation, Indebtedness incurred in connection with, or in
contemplation of, such other Person merging with or into or becoming a
Subsidiary of such specified Person, and (ii) Indebtedness secured by a Lien
encumbering any asset acquired by such specified Person.
 
  "Affiliate" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person. For purposes of this definition, "control"
(including, with correlative meanings, the terms "controlling," "controlled
by" and "under common control with"), as used with respect to any Person,
shall mean the possession, directly or indirectly, of the power to direct or
cause the direction of the management or policies of such Person, whether
through the ownership of voting securities, by agreement or otherwise;
provided that beneficial ownership of 10% or more of the Voting Stock of a
Person shall be deemed to be control.
 
  "Asset Sale" means (i) the sale, lease, conveyance or other disposition of
any assets or rights (including, without limitation, by way of a sale and
leaseback) other than sales of inventory in the ordinary course of business
consistent with past practices (provided that the sale, conveyance or other
disposition of all or substantially all of the assets of the Company and its
Subsidiaries, taken as a whole, will be governed by the provisions of the
Indenture described above under the caption "--Change of Control" and/or the
provisions
 
                                      88
<PAGE>
 
described above under the caption "Merger, Consolidation or Sale of Assets"
and not by the provisions of the Asset Sale covenant), and (ii) the issue or
sale by any Restricted Subsidiary of Equity Interests of any of the Company's
Subsidiaries, in the case of either clause (i) or (ii), whether in a single
transaction or a series of related transactions (a) that have a fair market
value in excess of $2.0 million or (b) for net proceeds in excess of $2.0
million. Notwithstanding the foregoing, the following items shall not be
deemed to be Asset Sales: (i) a transfer of assets by the Company to a Wholly
Owned Restricted Subsidiary or by a Wholly Owned Restricted Subsidiary to the
Company or to another Wholly Owned Restricted Subsidiary, (ii) an issuance of
Equity Interests by a Wholly Owned Restricted Subsidiary to the Company or to
another Wholly Owned Restricted Subsidiary, (iii) a Restricted Payment that is
permitted by the covenant described above under the caption "--Restricted
Payments," (iv) the sale and leaseback of any assets within 120 days of the
date of acquisition or completion of construction of such assets, (v) the sale
at fair market value of property or equipment that has become worn out,
obsolete or damaged or otherwise unsuitable for use in connection with the
business of the Company or any Restricted Subsidiary, as the case may be, in
the ordinary course of business and (vi) bare-boat charters entered into in
the ordinary course of business for a term not to exceed 12 months.
 
  "Attributable Debt" in respect of a sale and leaseback transaction means, at
the time of determination, the present value (discounted at the rate of
interest implicit in such transaction, determined in accordance with GAAP) of
the obligation of the lessee for net rental payments during the remaining term
of the lease included in such sale and leaseback transaction (including any
period for which such lease has been extended or may, at the option of the
lessor, be extended).
 
  "Capital Lease Obligation" means, at the time any determination thereof is
to be made, the amount of the liability in respect of a capital lease that
would at such time be required to be capitalized on a balance sheet in
accordance with GAAP.
 
  "Capital Stock" means (i) in the case of a corporation, corporate stock,
(ii) in the case of an association or business entity, any and all shares,
interests, participations, rights or other equivalents (however designated) of
corporate stock, (iii) in the case of a partnership or limited liability
company, partnership or membership interests (whether general or limited) and
(iv) any other interest or participation that confers on a Person the right to
receive a share of the profits and losses of, or distributions of assets of,
the issuing Person.
 
  "Cash Equivalents" means (i) United States dollars, (ii) securities issued
or directly and fully guaranteed or insured by the United States government or
any agency or instrumentality thereof (provided that the full faith and credit
of the United States is pledged in support thereof) having maturities of not
more than one year from the date of acquisition, (iii) certificates of deposit
and eurodollar time deposits with maturities of one year or less from the date
of acquisition, bankers' acceptances with maturities not exceeding one-year
and overnight bank deposits, in each case with any domestic commercial bank
having capital and surplus in excess of $500 million, (iv) repurchase
obligations with a term of not more than thirty days for underlying securities
of the types described in clauses (ii) and (iii) above entered into with any
financial institution meeting the qualifications specified in clause (iii)
above, (v) obligations issued or fully guaranteed by any state of the United
States of America or any political subdivision of any such state or any public
instrumentality thereof maturing within one year from the date of acquisition
thereof and, at the time of acquisition, having one of the two highest ratings
obtainable from either Standard & Poor's Corporation or Moody's Investors
Service, Inc., (vi) commercial paper having the highest rating obtainable from
Moody's Investors Service, Inc. or Standard & Poor's Corporation and in each
case maturing within one year after the date of acquisition, (vii) money
market funds at least 95% of the assets of which constitute Cash Equivalents
of the kinds described in clauses (i) through (vii) of this definition and
(viii) short-term asset management accounts offered by any lender under Credit
Facilities for the purpose of investing in notes issued by a corporation
(other than the Company or any Affiliate of the Company) organized under the
laws of any state of the United States or of the District of Columbia and
rated A-2 or higher by Standard & Poor's Rating Group, a division of McGraw
Hill, Inc. or P-2 or higher by Moody's Investors Service, Inc.
 
  "Citicorp" means Citicorp, a Delaware corporation, or any successor thereto
by merger or consolidation.
 
                                      89
<PAGE>
 
  "Consolidated Cash Flow" means, with respect to any Person for any period,
the Consolidated Net Income of such Person for such period plus (i) an amount
equal to any extraordinary or nonrecurring loss plus any net loss realized in
connection with an Asset Sale, to the extent such losses were deducted in
computing such Consolidated Net Income, plus (ii) provision for taxes based on
income or profits of such Person and its Restricted Subsidiaries for such
period, to the extent that such provision for taxes was deducted in computing
such Consolidated Net Income, plus (iii) consolidated interest expense of such
Person and its Restricted Subsidiaries for such period, whether paid or
accrued and whether or not capitalized (including, without limitation,
amortization of debt issuance costs and original issue discount, non-cash
interest payments, the interest component of any deferred payment obligations,
the interest component of all payments associated with Capital Lease
Obligations, imputed interest with respect to Attributable Debt, commissions,
discounts and other fees and charges incurred in respect of letter of credit
or bankers' acceptance financings, and net payments (if any) pursuant to
Hedging Obligations), to the extent that any such expense was deducted in
computing such Consolidated Net Income, plus (iv) depreciation, amortization
(including amortization of goodwill and other intangibles but excluding
amortization of prepaid cash expenses that were paid in a prior period) and
other non-cash expenses (excluding any such non-cash expense to the extent
that it represents an accrual of or reserve for cash expenses in any future
period or amortization of a prepaid cash expense that was paid in a prior
period) of such Person and its Restricted Subsidiaries for such period to the
extent that such depreciation, amortization and other non-cash expenses were
deducted in computing such Consolidated Net Income, plus, without duplication,
(v) any interest expense on Indebtedness of another person that is guaranteed
by such person or a Subsidiary of such person or secured by a Lien on the
assets of such person or one of its Subsidiaries (to the extent that such
interest expense was deducted in computing Consolidated Net Income in such
period), plus (vi) expenses and charges of the Company related to the
Transaction incurred or for which the Company became obligated on or prior to
or within 30 days after the date of the Indenture plus (vii) incremental
expenses incurred associated with the Chicago Flood Litigation not exceeding
$800,000, minus (viii) non-cash items increasing such Consolidated Net Income
for such period, in each case, on a consolidated basis and determined in
accordance with GAAP.
 
  "Consolidated Net Income" means, with respect to any Person for any period,
the aggregate of the Net Income of such Person and its Restricted Subsidiaries
for such period, on a consolidated basis, determined in accordance with GAAP;
provided that (i) the Net Income (but not loss) of any Person that is not a
Restricted Subsidiary or that is accounted for by the equity method of
accounting shall be included only to the extent of the amount of dividends or
distributions paid in cash to the referent Person or a Wholly Owned Restricted
Subsidiary thereof, (ii) the Net Income of any Restricted Subsidiary shall be
excluded to the extent that the declaration or payment of dividends or similar
distributions by that Restricted Subsidiary of that Net Income is not at the
date of determination permitted without any prior governmental approval (that
has not been obtained) or, directly or indirectly, by operation of the terms
of its charter or any agreement, instrument, judgment, decree, order, statute,
rule or governmental regulation applicable to that Restricted Subsidiary or
its stockholders, (iii) the Net Income of any Person acquired in a pooling of
interests transaction for any period prior to the date of such acquisition
shall be excluded, (iv) the cumulative effect of a change in accounting
principles shall be excluded and (v) the Net Income (but not loss) of any
Unrestricted Subsidiary shall be excluded, whether or not distributed to the
Company or one of its Subsidiaries.
 
  "Credit Facilities" means, with respect to the Company or its Restricted
Subsidiaries, one or more debt facilities (including, without limitation, the
New Credit Facility) or commercial paper facilities with banks or other
institutional lenders providing for revolving credit loans, term loans,
receivables financing (including through the sale of receivables to such
lenders or to special purpose entities formed to borrow from such lenders
against such receivables) or letters of credit, in each case, as increased as
permitted by the terms of the Indenture, and amended, restated, modified,
renewed, refunded, replaced or refinanced in whole or in part from time to
time.
 
  "CVC" means Citicorp Venture Capital, Ltd., a New York corporation, or any
successor thereto by merger or consolidation.
 
  "Default" means any event that is or with the passage of time or the giving
of notice or both would be an Event of Default.
 
                                      90
<PAGE>
 
  "Designated Senior Debt" means (i) any Obligations outstanding under the New
Credit Facility (including letters of credit), (ii) any Permitted Bonding
Obligation and (iii) any other Senior Debt permitted under the Indenture the
principal amount of which is $50.0 million or more and that has been
designated by the Company as "Designated Senior Debt." Notwithstanding the
foregoing, Indebtedness under the New Credit Facility shall be deemed
outstanding for purposes of this definition at all times when the lenders
thereunder have an effective commitment to extend credit thereunder,
regardless of whether any such Indebtedness is actually outstanding at such
time.
 
  "Disqualified Stock" means any Capital Stock that, by its terms (or by the
terms of any security into which it is convertible, or for which it is
exchangeable, at the option of the holder thereof), or upon the happening of
any event, matures or is mandatorily redeemable, pursuant to a sinking fund
obligation or otherwise, or redeemable at the option of the Holder thereof, in
whole or in part, on or prior to the date that is 91 days after the date on
which the Notes mature; provided, however, that any Capital Stock that would
constitute Disqualified Stock solely because the holders thereof have the
right to require the Company to repurchase such Capital Stock upon the
occurrence of a Change of Control or an Asset Sale shall not constitute
Disqualified Stock if the terms of such Capital Stock provide that the Company
may not repurchase or redeem any such Capital Stock pursuant to such
provisions unless such repurchase or redemption complies with the covenant
described above under the caption "--Certain Covenants--Restricted Payments."
 
  "Equity Interests" means Capital Stock and all warrants, options or other
rights to acquire Capital Stock (but excluding any debt security that is
convertible into, or exchangeable for, Capital Stock).
 
  "Existing Indebtedness" means Indebtedness (including Guarantees) of the
Company and its Subsidiaries (other than Indebtedness under the New Credit
Facility) in existence on the date of the Indenture, until such amounts are
permanently repaid.
 
  "Fixed Charges" means, with respect to any Person for any period, the sum,
without duplication, of (i) the consolidated interest expense of such Person
and its Restricted Subsidiaries for such period, whether paid or accrued
(including, without limitation, amortization of debt issuance costs and
original issue discount, non-cash interest payments, the interest component of
any deferred payment obligations, the interest component of all payments
associated with Capital Lease Obligations, imputed interest with respect to
Attributable Debt, commissions, discounts and other fees and charges incurred
in respect of letter of credit or bankers' acceptance financings, and net
payments (if any) pursuant to interest Hedging Obligations; provided, however,
that in no event shall any amortization of deferred financing costs incurred
in connection with the Transaction be included in Fixed Charges) and (ii) the
consolidated interest of such Person and its Restricted Subsidiaries that was
capitalized during such period, and (iii) any interest expense on Indebtedness
of another Person that is Guaranteed by such Person or one of its Restricted
Subsidiaries or secured by a Lien on assets of such Person or one of its
Restricted Subsidiaries (whether or not such Guarantee or Lien is called upon)
and (iv) the product of (a) all cash dividend payments and non-cash dividend
payments, on any series of preferred stock and any series of Disqualified
Stock, in each case, of such Person or any of its Restricted Subsidiaries,
other than dividend payments (x) on Equity Interests payable solely in Equity
Interests of the Company (other than Disqualified Stock) or (y) to the Company
or a Subsidiary Guarantor, times (b) a fraction, the numerator of which is one
and the denominator of which is one minus the then current combined federal,
state and local statutory tax rate of such Person, expressed as a decimal, in
each case, on a consolidated basis and in accordance with GAAP.
 
  "Fixed Charge Coverage Ratio" means with respect to any Person for any
period, the ratio of the Consolidated Cash Flow of such Person for such period
to the Fixed Charges of such Person for such period. In the event that the
referent Person or any of its Restricted Subsidiaries incurs, assumes,
Guarantees, repays or redeems any Indebtedness (other than repayment of
revolving credit borrowings that are not accompanied by a permanent reduction
in the commitment amount) or issues or redeems preferred stock subsequent to
the commencement of the period for which the Fixed Charge Coverage Ratio is
being calculated but prior to the date on which the event for which the
calculation of the Fixed Charge Coverage Ratio is made (the "Calculation
Date"), then the Fixed Charge Coverage Ratio shall be calculated giving pro
forma effect to such incurrence,
 
                                      91
<PAGE>
 
assumption, Guarantee or redemption of Indebtedness, or such issuance or
redemption of preferred stock, as if the same had occurred at the beginning of
the applicable four-quarter reference period. In addition, for purposes of
making the computation referred to above, (i) acquisitions that have been made
by the Company or any of its Restricted Subsidiaries, including through
mergers (including the Merger) or consolidations and including any related
financing transactions, during the four-quarter reference period or subsequent
to such reference period and on or prior to the Calculation Date shall be
deemed to have occurred on the first day of the four-quarter reference period
and Consolidated Cash Flow for such reference period shall be calculated
without giving effect to clause (iii) of the proviso set forth in the
definition of Consolidated Net Income, (ii) the Consolidated Cash Flow
attributable to discontinued operations, as determined in accordance with
GAAP, and operations or businesses disposed of prior to the Calculation Date,
shall be excluded, and (iii) the Fixed Charges attributable to discontinued
operations, as determined in accordance with GAAP, and operations or
businesses disposed of prior to the Calculation Date, shall be excluded, but
only to the extent that the obligations giving rise to such Fixed Charges will
not be obligations of the referent Person or any of its Restricted
Subsidiaries following the Calculation Date.
 
  "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as have been approved by a significant segment of the accounting
profession, which are in effect on the date of the Indenture.
 
  "Guarantee" means a guarantee (other than by endorsement of negotiable
instruments for collection in the ordinary course of business), direct or
indirect, in any manner (including, without limitation, by way of a pledge of
assets or through letters of credit or reimbursement agreements in respect
thereof), of all or any part of any Indebtedness.
 
  "Hedging Obligations" means, with respect to any Person, the obligations of
such Person under (i) interest rate or currency swap agreements, interest rate
cap agreements and interest rate collar agreements, (ii) other agreements or
arrangements solely designed to protect such Person against fluctuations in
interest or currency exchange rates and (iii) commodities purchase and sale
agreements and other similar agreements designed to protect such Person
against fluctuations in the price of raw materials used by the Company and its
Restricted Subsidiaries in the ordinary course of business.
 
  "Indebtedness" means, with respect to any Person, any indebtedness of such
Person, whether or not contingent, in respect of borrowed money or evidenced
by bonds, notes, debentures or similar instruments or letters of credit (or
reimbursement agreements in respect thereof) or banker's acceptances or
representing Capital Lease Obligations or the balance deferred and unpaid of
the purchase price of any property or representing any Hedging Obligations,
except any such balance that constitutes an accrued expense or trade payable,
if and to the extent any of the foregoing (other than letters of credit,
Hedging Obligations and Attributable Debt) would appear as a liability upon a
balance sheet of such Person prepared in accordance with GAAP, as well as all
Indebtedness of others secured by a Lien on any asset of such Person (whether
or not such Indebtedness is assumed by such Person) and, to the extent not
otherwise included, the Guarantee by such Person of any indebtedness of any
other Person. The amount of any Indebtedness (other than Hedging Obligations,
guarantees and Attributable Debt) outstanding as of any date shall be (i) the
accreted value thereof, in the case of any Indebtedness issued with original
issue discount, and (ii) the principal amount thereof, together with any
interest thereon that is more than 30 days past due, in the case of any other
Indebtedness.
 
  "Investments" means, with respect to any Person, all investments by such
Person in other Persons (including Affiliates) in the forms of direct or
indirect loans (including guarantees of Indebtedness or other obligations),
advances or capital contributions (excluding commission, travel and similar
advances to officers and employees made in the ordinary course of business),
purchases or other acquisitions of Indebtedness, Equity Interests or other
securities, together with all items that are or would be classified as
investments on a balance sheet prepared in accordance with GAAP; provided that
an acquisition of Equity Interests or other securities by
 
                                      92
<PAGE>
 
the Company or any of its Restricted Subsidiaries for consideration consisting
solely of Equity Interests (other than Disqualified Stock) of the Company
shall not be deemed to be an Investment. If the Company or any Restricted
Subsidiary of the Company sells or otherwise disposes of any Equity Interests
of any direct or indirect Restricted Subsidiary of the Company such that,
after giving effect to any such sale or disposition, such Person is no longer
a Restricted Subsidiary of the Company, the Company shall be deemed to have
made an Investment on the date of any such sale or disposition equal to the
fair market value of the Equity Interests of such Restricted Subsidiary not
sold or disposed of in an amount determined as provided in the final paragraph
of the covenant described above under the caption "--Restricted Payments."
 
  "Lien" means, with respect to any asset, any mortgage, lien, pledge, charge,
security interest or encumbrance of any kind in respect of such asset, whether
or not filed, recorded or otherwise perfected under applicable law (including
any conditional sale or other title retention agreement, any lease in the
nature thereof, any option or other agreement to sell or give a security
interest in and any filing of or agreement to give any financing statement
under the Uniform Commercial Code (or equivalent statutes) of any
jurisdiction).
 
  "Net Income" means, with respect to any Person for any period, the net
income (loss) of such Person, determined in accordance with GAAP and before
any reduction in respect of dividends on preferred interests, (i) excluding,
however, (a) any gain (but not loss), together with any related provision for
taxes on such gain (but not loss), realized in connection with (1) any Asset
Sale (including, without limitation, dispositions pursuant to sale and
leaseback transactions) or (2) the disposition of any securities by such
Person or any of its Restricted Subsidiaries or the extinguishment of any
Indebtedness of such Person or any of its Restricted Subsidiaries and (b) any
extraordinary or nonrecurring gain (but not loss), together with any related
provision for taxes on such extraordinary or nonrecurring gain (but not loss)
and (ii) less the aggregate amount of all Restricted Payments made by such
Person or any of its Restricted Subsidiaries for such period pursuant to
clause (vii) of the covenant described under the caption "--Certain
Covenants--Restricted Payments" to the extent not otherwise deducted in
computing such Net Income.
 
  "Net Proceeds" means the aggregate cash proceeds received by the Company or
any of its Restricted Subsidiaries in respect of any Asset Sale (including,
without limitation, any cash received upon the sale or other disposition of
any non-cash consideration received in any Asset Sale), net of the direct
costs relating to such Asset Sale (including, without limitation, legal,
accounting and investment banking fees, and sales commissions) and any
relocation expenses incurred as a result thereof, any taxes paid or payable as
a result thereof (after taking into account any available tax credits or
deductions and any tax sharing arrangements), and any reserve for adjustment
in respect of the sale price of such asset or assets established in accordance
with GAAP.
 
  "New Bonding Agreement" means that certain Second Amended and Restated
Underwriting and Continuing Indemnity Agreement, dated as of the date of the
Indenture, by and among the Company, certain of its Subsidiaries and the
Sureties, including any related notes, guarantees, collateral documents,
instruments and agreements executed in connection therewith, as amended,
restated, modified, renewed, refunded, replaced or refinanced from time to
time.
 
  "New Credit Facility" means that certain Credit Agreement, dated as of the
date of the Indenture, by and among the Company, Bank of America National
Trust and Savings Association, as agent, and certain other lenders party
thereto, initially providing for up to $55.0 million of revolving credit
borrowings and $55.0 million of term borrowings, including any related notes,
guarantees, collateral documents, instruments and agreements executed in
connection therewith, and in each case as increased as permitted by the terms
of the Indenture, and amended, modified, renewed, restated, refunded, replaced
or refinanced from time to time.
 
  "Non-Recourse Debt" means Indebtedness (i) as to which neither the Company
nor any of its Restricted Subsidiaries (a) provides credit support of any kind
(including any undertaking, agreement or instrument that would constitute
Indebtedness), (b) is directly or indirectly liable (as a guarantor or
otherwise), or (c) constitutes the lender; and (ii) no default with respect to
which (including any rights that the holders thereof may have to take
enforcement action against an Unrestricted Subsidiary) would permit (upon
notice, lapse of time or both)
 
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<PAGE>
 
any holder of any other Indebtedness (other than the Notes being offered
hereby) of the Company or any of its Restricted Subsidiaries to declare a
default on such other Indebtedness or cause the payment thereof to be
accelerated or payable prior to its stated maturity; and (iii) as to which the
lenders have been notified in writing that they will not have any recourse to
the stock or assets of the Company or any of its Restricted Subsidiaries.
 
  "Obligations" means any principal, interest, penalties, fees,
indemnifications, costs, expenses, reimbursement obligations, damages and
other liabilities and obligations which may arise under or in connection with
the New Credit Facility or the New Bonding Agreement or under or in connection
with the documentation governing any Indebtedness, and in all cases whether
direct or indirect, absolute or contingent, now outstanding or hereafter
created, assumed or incurred and including, without limitation, interest
accruing subsequent to the filing of a petition in bankruptcy or the
commencement of any insolvency, reorganization or similar proceedings at the
rate provided in the relevant document, whether or not an allowed claim, and
any obligation to redeem or defease any of the foregoing.
 
  "Permitted Bonding Obligations" means (i) obligations incurred by the
Company or any of its Subsidiaries (including Guarantees) with respect to bid,
performance, surety, appeal or similar bonds and completion guarantees in the
ordinary course of business and consistent with past practices and (ii)
obligations incurred by the Company or any of its Subsidiaries (including
Guarantees) under the New Bonding Agreement.
 
  "Permitted Business" means any of the businesses engaged in by the Company
and its Restricted Subsidiaries on the date of the Indenture and any other
business reasonably related, complementary or ancillary thereto.
 
  "Permitted Investments" means (a) any Investment in the Company or in a
Restricted Subsidiary of the Company that is a Subsidiary Guarantor and is
engaged in a Permitted Business; (b) any Investment in Cash Equivalents; (c)
any Investment by the Company or any Restricted Subsidiary of the Company in a
Person, if as a result of such Investment (i) such Person becomes a Restricted
Subsidiary of the Company and a Subsidiary Guarantor and is engaged in a
Permitted Business or (ii) such Person is merged, consolidated or amalgamated
with or into, or transfers or conveys substantially all of its assets to, or
is liquidated into, the Company or a Restricted Subsidiary of the Company that
is a Subsidiary Guarantor and that is engaged in Permitted Business; (d) any
Investment made as a result of the receipt of assets not constituting Cash
Equivalents from an Asset Sale that was made pursuant to and in compliance
with the covenant described above under the caption "--Repurchase at the
Option of Holders--Asset Sales;" (e) any acquisition of assets solely in
exchange for the issuance of Equity Interests (other than Disqualified Stock)
of the Company; (f) other Investments in any Person having an aggregate fair
market value (measured on the date each such Investment was made and without
giving effect to subsequent changes in value), when taken together with all
other Investments made pursuant to this clause (f) that are at the time
outstanding, not to exceed $10.0 million; (g) Investments in securities of
customers received in settlement of obligations or pursuant to a plan of
reorganization or similar arrangement upon the bankruptcy or insolvency of
such trade creditors or customers; (h) Investments existing on the date of the
Indenture; (i) loans and advances to officers, directors, members and
employees for business-related travel expenses, moving expenses and other
similar expenses, in each case, incurred in the ordinary course of business
and consistent with past practices not to exceed $1.0 million in the aggregate
at any time; (j) any Hedging Obligation; (k) Investments consisting of
intercompany loans from the Company and its Restricted Subsidiaries to
Restricted Subsidiaries, including Restricted Subsidiaries that are not
Subsidiary Guarantors; (l) Investments consisting of capital contributions
from the Company or any Restricted Subsidiaries to Restricted Subsidiaries
that are not Subsidiary Guarantors in an aggregate amount at any one time
outstanding not to exceed $10.0 million; and (m) Investments in joint ventures
formed in the ordinary course of business for the purpose of bidding and
completing specific projects within a Permitted Business in an aggregate
amount at any one time outstanding not to exceed $5.0 million.
 
  "Permitted Junior Securities" means Equity Interests in the Company or any
Subsidiary Guarantor or debt securities that are subordinated to all Senior
Debt (and any debt securities issued in exchange for Senior Debt) to
substantially the same extent as, or to a greater extent than, the Notes are
subordinated to Senior Debt pursuant
 
                                      94
<PAGE>
 
to the Indenture; provided that no such Equity Interests or debt securities
may be issued if the rights of the holders of the Senior Debt are impaired by
any such issuance in connection with a reorganization, including, without
limitation, by reason of such rights being impaired within the meaning of
Section 1124 of Title 11 of the United States Code.
 
  "Permitted Liens" means (i) Liens on assets of the Company securing Senior
Debt of the Company and Liens on assets of Subsidiary Guarantors securing
Senior Debt, provided, in each case, that such Indebtedness was permitted by
the terms of the Indenture to be incurred; (ii) Liens in favor of the Company
or a Subsidiary Guarantor; (iii) Liens on property of a Person existing at the
time such Person is merged with or into or consolidated with the Company or
any Restricted Subsidiary of the Company; provided that such Liens were in
existence prior to the contemplation of such merger or consolidation and do
not extend to any assets other than those of the Person merged into or
consolidated with the Company; (iv) Liens on property existing at the time of
acquisition thereof by the Company or any Restricted Subsidiary of the
Company, provided that such Liens were in existence prior to the contemplation
of such acquisition; (v) Liens to secure the performance of statutory
obligations, surety or appeal bonds, bid bonds, payment bonds, performance and
lien bonds or other obligations of a like nature incurred in the ordinary
course of business; (vi) Liens to secure Indebtedness (including Capital Lease
Obligations) permitted by clause (v) or (ix) of the second paragraph of the
covenant entitled "Incurrence of Indebtedness and Issuance of Preferred Stock"
covering, in the case of such clause (v), only the assets acquired with such
Indebtedness; (vii) Liens existing on the date of the Indenture; (viii) Liens
for taxes, assessments or governmental charges or claims that are not yet
delinquent or that are being contested in good faith by appropriate
proceedings promptly instituted and diligently concluded, provided that any
reserve or other appropriate provision as shall be required in conformity with
GAAP shall have been made therefor; (ix) Liens on assets of Unrestricted
Subsidiaries that secure Non-Recourse Debt of Unrestricted Subsidiaries; (x)
Liens incurred in the ordinary course of business of the Company or any
Restricted Subsidiary of the Company with respect to obligations that do not
exceed $7.5 million at any one time outstanding and that (a) are not incurred
in connection with the borrowing of money or the obtaining of advances or
credit (other than trade credit in the ordinary course of business) and (b) do
not in the aggregate materially detract from the value of the property or
materially impair the use thereof in the operation of business by the Company
or such Restricted Subsidiary; (xi) statutory Liens of landlords and Liens of
carriers, warehousemen, mechanics, suppliers, materialmen, repairmen and other
Liens (including statutory maritime Liens) imposed by law incurred in the
ordinary course of business; (xii) Liens incurred or deposits made in the
ordinary course of business in connection with workers' compensation,
unemployment insurance and other types of social security or similar
obligations, or to secure the performance of tenders, statutory obligations,
surety and appeal bonds, bids, leases, government contracts, performance and
return-of-money bonds and other similar obligations (exclusive of obligations
for the payment of borrowed money); (xiii) judgment or attachment Liens not
giving rise to an Event of Default; (xiv) easements, rights-of-way, zoning
restrictions and other similar charges or encumbrances in respect of real
property not interfering in any material respect with the ordinary course of
the business of the Company or any of its Restricted Subsidiaries; (xv) any
interest or title of a lessor under any lease, whether or not characterized as
capital or operating; provided that such Liens do not extend to any property
or assets which is not leased property subject to such lease; (xvi) Liens
securing Hedging Obligations which Hedging Obligations relate to Indebtedness
that is otherwise permitted under the Indenture; (xvii) Liens securing
reimbursement obligations with respect to letters of credit and products and
proceeds thereof; (xviii) Liens securing Permitted Refinancing Indebtedness
which is incurred to refinance any Indebtedness which has been secured by a
Lien permitted under the Indenture and which has been incurred in accordance
with the provisions of the Indenture; (xix) Liens in favor of the Company or
any of its Restricted Subsidiaries securing Indebtedness of any Restricted
Subsidiary that is not a Subsidiary Guarantor; (xx) Liens with respect to
current wages of the master and crew and for wages of a stevedore when
employed directly by the Company or any Subsidiary of the Company, or by the
charterer, operator, master or agent of any of the vessels owned or operated
by the Company or any Subsidiary of the Company; and (xxi) Liens for salvage
(including contract salvage).
 
  "Permitted Refinancing Indebtedness" means any Indebtedness of the Company
or any of its Restricted Subsidiaries issued in exchange for, to extend,
refinance, renew, replace, defease or refund other Indebtedness of
 
                                      95
<PAGE>
 
the Company or any of its Restricted Subsidiaries (other than intercompany
Indebtedness); provided that: (i) the principal amount (or accreted value, if
applicable) of such Permitted Refinancing Indebtedness does not exceed the
principal amount of (or accreted value, if applicable), plus accrued interest
on, the Indebtedness so extended, refinanced, renewed, replaced, defeased or
refunded (plus the amount of reasonable expenses, premiums, penalties, fees
and interest incurred in connection therewith); (ii) such Permitted
Refinancing Indebtedness has a final maturity date later than the final
maturity date of, and has a Weighted Average Life to Maturity equal to or
greater than the Weighted Average Life to Maturity of, the Indebtedness being
extended, refinanced, renewed, replaced, defeased or refunded; (iii) if the
Indebtedness being extended, refinanced, renewed, replaced, defeased or
refunded is subordinated in right of payment to the Notes, such Permitted
Refinancing Indebtedness has a final maturity date later than the final
maturity date of, and is subordinated in right of payment to, the Notes on
terms at least as favorable to the Holders of Notes as those contained in the
documentation governing the Indebtedness being extended, refinanced, renewed,
replaced, defeased or refunded; and (iv) such Indebtedness is incurred either
by the Company or by the Restricted Subsidiary who is the obligor on the
Indebtedness being extended, refinanced, renewed, replaced, defeased or
refunded.
 
  "Public Equity Offering" means a public offering pursuant to an effective
registration statement under the Securities Act of Equity Interests (other
than Disqualified Stock) of the Company.
 
  "Qualified Proceeds" means any of the following or any combination of the
following: (i) cash, (ii) Cash Equivalents, (iii) assets that are used or
useful in a Permitted Business and (iv) the Capital Stock of any Person
engaged in a Permitted Business if, in connection with the receipt by the
Company or any Restricted Subsidiary of the Company of such Capital Stock, (a)
such Person becomes a Restricted Subsidiary of the Company or any Restricted
Subsidiary of the Company or (b) such Person is merged, consolidated or
amalgamated with or into, or transfers or conveys substantially all of its
assets to, or is liquidated into, the Company or any Restricted Subsidiary of
the Company.
 
  "Restricted Investment" means an Investment other than a Permitted
Investment.
 
  "Restricted Subsidiary" of a Person means any Subsidiary of the referent
Person that is not an Unrestricted Subsidiary.
 
  "Senior Debt" means (i) all Obligations of the Company or a Subsidiary
Guarantor outstanding under the New Credit Facility, including any Guarantee
thereof and all Hedging Obligations with respect thereto and all interest and
fees accrued with respect thereto following the commencement of a proceeding
under bankruptcy law, whether or not considered an allowed claim in such
proceeding, (ii) all Permitted Bonding Obligations from time to time
outstanding, (iii) any other Indebtedness of the Company or a Subsidiary
Guarantor permitted to be incurred under the terms of the Indenture, unless
the instrument under which such Indebtedness is incurred expressly provides
that it is on a parity with or subordinated in right of payment to the Notes
and (iv) all Obligations with respect to the foregoing. Notwithstanding
anything to the contrary in the foregoing, Senior Debt will not include (v)
any liability for federal, state, local or other taxes owed or owing, (w) any
Indebtedness of the Company or any Subsidiary Guarantor to any Subsidiary of
the Company or any other Affiliates of the Company, (x) any trade payables,
(y) any Indebtedness which is expressly subordinated to any other Indebtedness
of the Company or any of its Subsidiaries, or (z) any Indebtedness that is
incurred in violation of the Indenture.
 
  "Significant Subsidiary" means any Subsidiary that would be a "significant
subsidiary" as defined in Article 1, Rule 1-02 of Regulation S-X, promulgated
pursuant to the Act, as such Regulation is in effect on the date hereof.
 
  "Stated Maturity" means, with respect to any installment of interest or
principal (including any sinking fund payment) on any series of Indebtedness,
the date on which such payment of interest or principal was scheduled to be
paid in the original documentation governing such Indebtedness, and shall not
include any
 
                                      96
<PAGE>
 
contingent obligations to repay, redeem or repurchase any such interest or
principal prior to the date originally scheduled for the payment thereof.
 
  "Stockholders' Agreement" means the Securities Purchase and Holders
Agreement among the stockholders of the Company, as in effect on the date of
the Indenture.
 
  "Subsidiary" means, with respect to any Person, (i) any corporation,
association or other business entity of which more than 50% of the total
voting power of shares of Capital Stock entitled (without regard to the
occurrence of any contingency) to vote in the election of directors, managers
or trustees thereof is at the time owned or controlled, directly or
indirectly, by such Person or one or more of the other Subsidiaries of that
Person (or a combination thereof) and (ii) any partnership (a) the sole
general partner or the managing general partner of which is such Person or a
Subsidiary of such Person or (b) the only general partners of which are such
Person or of one or more Subsidiaries of such Person (or any combination
thereof).
 
  "Subsidiary Guarantors" means each of (i) the wholly owned domestic
Restricted Subsidiaries of the Company on the date of the Indenture and (ii)
any other subsidiary that executes a Subsidiary Guarantee in accordance with
the provisions of the Indenture, and their respective successors and assigns.
 
  "Sureties" means Reliance Insurance Company, United Pacific Insurance
Company, Reliance National Insurance Company and Reliance Surety Company,
together with any of their respective affiliates.
 
  "Unrestricted Subsidiary" means (i) any Subsidiary of the Company or any
successor to any of them) that is designated by the Board of Directors of the
Company as an Unrestricted Subsidiary pursuant to a board resolution; but only
to the extent that such Subsidiary: (a) has no Indebtedness other than Non-
Recourse Debt; (b) is not party to any agreement, contract, arrangement or
understanding with the Company or any Restricted Subsidiary of the Company
unless the terms of any such agreement, contract, arrangement or understanding
are no less favorable to the Company or such Restricted Subsidiary than those
that might be obtained at the time from Persons who are not Affiliates of the
Company; (c) is a Person with respect to which neither the Company nor any of
its Restricted Subsidiaries has any direct or indirect obligation (x) to
subscribe for additional Equity Interests or (y) to maintain or preserve such
Person's financial condition or to cause such Person to achieve any specified
levels of operating results; (d) has not guaranteed or otherwise directly or
indirectly provided credit support for any Indebtedness of the Company or any
of its Restricted Subsidiaries; and (e) has at least one director on its board
of directors that is not a director or executive officer of the Company or any
of its Restricted Subsidiaries and has at least one executive officer that is
not a director or executive officer of the Company or any of its Restricted
Subsidiaries. Any such designation by the Board of Directors shall be
evidenced to the Trustee by filing with the Trustee a certified copy of the
Board Resolution giving effect to such designation and an Officers'
Certificate certifying that such designation complied with the foregoing
conditions and was permitted by the covenant described above under the caption
"Certain Covenants--Restricted Payments." If, at any time, any Unrestricted
Subsidiary would fail to meet the foregoing requirements as an Unrestricted
Subsidiary, it shall thereafter cease to be an Unrestricted Subsidiary for
purposes of the Indenture and any Indebtedness of such Subsidiary shall be
deemed to be incurred by a Restricted Subsidiary of the Company as of such
date (and, if such Indebtedness is not permitted to be incurred as of such
date under the covenant described under the caption "Certain Covenants--
Incurrence of Indebtedness and Issuance of Disqualified Stock," the Company
shall be in default of such covenant). The Board of Directors of the Company
may at any time designate any Unrestricted Subsidiary to be a Restricted
Subsidiary; provided that such designation shall be deemed to be an incurrence
of Indebtedness by a Restricted Subsidiary of the Company of any outstanding
Indebtedness of such Unrestricted Subsidiary and such designation shall only
be permitted if (i) such Indebtedness is permitted under the covenant
described under the caption "Certain Covenants--Incurrence of Indebtedness and
Issuance of Disqualified Stock," calculated on a pro forma basis as if such
designation had occurred at the beginning of the four-quarter reference
period, and (ii) no Default or Event of Default would be in existence
following such designation.
 
  "Voting Stock" of any Person as of any date means the Capital Stock of such
Person that is at the time entitled to vote in the election of the Board of
Directors of such Person.
 
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<PAGE>
 
  "Weighted Average Life to Maturity" means, when applied to any Indebtedness
at any date, the number of years obtained by dividing (i) the sum of the
products obtained by multiplying (a) the amount of each then remaining
installment, sinking fund, serial maturity or other required payments of
principal, including payment at final maturity, in respect thereof, by (b) the
number of years (calculated to the nearest one-twelfth) that will elapse
between such date and the making of such payment, by (ii) the then outstanding
principal amount of such Indebtedness.
 
  "Wholly Owned Restricted Subsidiary" of any Person means a Restricted
Subsidiary of such Person all of the outstanding Capital Stock or other
ownership interests of which (other than directors' qualifying shares) shall
at the time be owned by such Person or by one or more Wholly Owned Restricted
Subsidiaries of such Person and one or more Wholly Owned Restricted
Subsidiaries of such Person.
 
                                      98
<PAGE>
 
                    CERTAIN FEDERAL INCOME TAX CONSEQUENCES
 
  The following discussion summarizes the material United States federal
income tax consequences of the Exchange Offer to a holder of Existing Notes
who is an individual citizen or resident of the United States or a United
States corporation that purchased the Existing Notes pursuant to their
original issue (a "U.S. Holder"). It is based on the Internal Revenue Code of
1986, as amended to the date hereof (the "Code"), existing and proposed
Treasury regulations, and judicial and administrative determinations, all of
which are subject to change at any time, possibly on a retroactive basis. The
following relates only to the Existing Notes, and the Exchange Notes received
therefor, that are held as "capital assets" within the meaning of Section 1221
of the Code by U.S. Holders. It does not discuss state, local, or foreign tax
consequences, nor does it discuss tax consequences to subsequent purchasers
(persons who did not purchase the Existing Notes pursuant to their original
issue), or to categories of holders that are subject to special rules, such as
foreign persons, tax-exempt organizations, insurance companies, banks and
dealers in stocks and securities. Tax consequences may vary depending on the
particular status of an investor. No rulings will be sought from the Internal
Revenue Service with respect to the federal income tax consequences of the
Exchange Offer.
 
  THIS SECTION DOES NOT PURPORT TO DEAL WITH ALL ASPECTS OF FEDERAL INCOME
TAXATION THAT MAY BE RELEVANT TO AN INVESTOR'S DECISION TO EXCHANGE EXISTING
NOTES FOR EXCHANGE NOTES. EACH INVESTOR SHOULD CONSULT WITH ITS OWN TAX
ADVISOR CONCERNING THE APPLICATION OF THE FEDERAL INCOME TAX LAWS AND OTHER
TAX LAWS TO ITS PARTICULAR SITUATION BEFORE DETERMINING WHETHER TO EXCHANGE
EXISTING NOTES FOR EXCHANGE NOTES.
 
THE EXCHANGE OFFER
 
  The exchange of Existing Notes pursuant to the Exchange Offer should be
treated as a continuation of the corresponding Existing Notes, because the
terms of the Exchange Notes are not materially different from the terms of the
Existing Notes. Accordingly, such exchange should not constitute a taxable
event to U.S. Holders and, therefore, (i) no gain or loss should be realized
by U.S. Holders upon receipt of an Exchange Note, (ii) the holding period of
an Exchange Note should include the holding period of the Existing Note
exchanged therefor and (iii) the adjusted tax basis of an Exchange Note should
be the same as the adjusted tax basis of the Existing Note exchanged therefor
immediately before the exchange.
 
STATED INTEREST
 
  Stated interest on a Note will be taxable to a U.S. Holder as ordinary
interest income at the time that such interest accrues or is received, in
accordance with the U.S. Holder's regular method of accounting for federal
income tax purposes. The Notes are not considered to have been issued with
original issue discount for federal income tax purposes.
 
SALE, EXCHANGE OR RETIREMENT OF THE NOTES
 
  A U.S. Holder's tax basis in a Note generally will be its cost. A U.S.
Holder generally will recognize gain or loss on the sale, exchange or
retirement of a Note in an amount equal to the difference between the amount
realized on the sale, exchange or retirement and the tax basis of the Note.
Gain or loss recognized on the sale, exchange or retirement of a Note
(excluding amounts received in respect of accrued interest, which will be
taxable as ordinary interest income) generally will be capital gain or loss
and will be long-term capital gain or loss, if the Note was held for more than
one year. Under recently enacted legislation, net long-term capital gain
recognized by non-corporate taxpayers is generally subject to a 20% maximum
rate of tax.
 
 
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<PAGE>
 
BACKUP WITHHOLDING
 
  Under certain circumstances, a U.S. Holder of a Note may be subject to
"backup withholding" at a 31% rate with respect to payments of interest
thereon or the gross proceeds from the disposition thereof.
 
  This withholding generally applies if the U.S. Holder fails to furnish his
or her social security number or other taxpayer identification number in the
specified manner and in certain circumstances or fails to properly certify
that he or she is not subject to backup withholding in general. Any amount
withheld from a payment to a U.S. Holder under the backup withholding rules is
allowable as a credit against such U.S. Holder's federal income tax liability.
Corporations and certain other entities described in the Code and Treasury
regulations are exempt from backup withholding if their exempt status is
properly established.
 
                             PLAN OF DISTRIBUTION
 
  Each broker-dealer that receives Exchange Notes for its own account pursuant
to the Exchange Offer must acknowledge that it will deliver a prospectus in
connection with any resale of such Exchange Notes. This Prospectus, as it may
be amended or supplemented from time to time, may be used by a broker-dealer
in connection with resales of Exchange Notes received in exchange for Existing
Notes where such Existing Notes were acquired as a result of market-making
activities or other trading activities. The Company has agreed that, for a
period of 180 days after the Expiration Date, it will make this Prospectus, as
amended or supplemented, available to any broker-dealer for use in connection
with any such resale. In addition, until 90 days after the date of this
Prospectus, all dealers effecting transactions in the Exchange Notes may be
required to deliver a prospectus.
 
  The Company will not receive any proceeds from any sale of Exchange Notes by
broker-dealers. Exchange Notes received by broker-dealers for their own
account pursuant to the Exchange Offer may be sold from time to time in one or
more transactions in the over-the-counter market, in negotiated transactions,
through the writing of options on the Exchange Notes or a combination of such
methods of resale, at market prices prevailing at the time of resale, at
prices related to such prevailing market prices or negotiated prices. Any such
resale may be made directly to purchasers or to or through brokers or dealers
who may receive compensation in the form of commissions or concessions from
any such broker-dealer or the purchasers of any such Exchange Notes. Any
broker-dealer that resells Exchange Notes that were received by it for its own
account pursuant to the Exchange Offer and any broker or dealer that
participates in a distribution of such Exchange Notes may be deemed to be an
"underwriter" within the meaning of the Securities Act and any profit on any
such resale of Exchange Notes and any commission or concessions received by
any such persons may be deemed to be underwriting compensation under the
Securities Act. The Letter of Transmittal states that, by acknowledging that
it will deliver and by delivering a prospectus, a broker-dealer will not be
deemed to admit that it is an "underwriter" within the meaning of the
Securities Act.
 
  For a period of 180 days after the Expiration Date the Company will promptly
send additional copies of this Prospectus and any amendment or supplement to
this Prospectus to any broker-dealer that requests such documents in the
Letter of Transmittal. The Company has agreed to pay all expenses incident to
the Exchange Offer other than commissions or concessions of any brokers or
dealers and will indemnify the Holders of the Securities (including any
broker-dealers) against certain liabilities, including liabilities under the
Securities Act.
 
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<PAGE>
 
                                 LEGAL MATTERS
 
  Certain legal matters with respect to the Exchange Notes offered hereby will
be passed upon for the Company by Dechert Price & Rhoads, Philadelphia,
Pennsylvania.
 
                                    EXPERTS
 
  The consolidated financial statements of the Company as of December 31, 1996
and 1997 and for each of the three years in the period ended December 31, 1997
included in this Prospectus have been audited by Deloitte & Touche LLP,
independent auditors, as stated in their report appearing herein, and are
included in reliance upon the report of such firm given upon their authority
as experts in accounting and auditing.
 
  The financial statements of Amboy as of December 31, 1997 and 1996 and for
each of the three years in the period ended December 31, 1997 included in this
Prospectus have been audited by J.H. Cohn LLP, independent public accountants,
as stated in their report included herein.
 
                                      101
<PAGE>
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
<TABLE>
<S>                                                                        <C>
GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES                     Page
Condensed Consolidated Balance Sheet of Great Lakes Dredge & Dock
 Corporation and Subsidiaries as of June 30, 1998--unaudited.............  F-2
Condensed Consolidated Statements of Income for Great Lakes Dredge & Dock
 Corporation and Subsidiaries for the six months ended June 30, 1998 and
 1997--unaudited.........................................................  F-3
Condensed Consolidated Statements of Cash Flows for Great Lakes Dredge &
 Dock Corporation and Subsidiaries for the six months ended June 30, 1998
 and 1997--unaudited.....................................................  F-4
Notes to Condensed Consolidated Financial Statements of Great Lakes
 Dredge & Dock Corporation and Subsidiaries as of June 30, 1998--
 unaudited...............................................................  F-5
Independent Auditors' Report.............................................  F-13
Consolidated Balance Sheets of Great Lakes Dredge & Dock Corporation and
 Subsidiaries as of December 31, 1997 and 1996...........................  F-14
Consolidated Statements of Income and Retained Earnings of Great Lakes
 Dredge & Dock Corporation and Subsidiaries for the years ended December
 31, 1997, 1996 and 1995.................................................  F-15
Consolidated Statements of Cash Flows of Great Lakes Dredge & Dock
 Corporation and Subsidiaries for the years ended December 31, 1997, 1996
 and 1995................................................................  F-16
Notes to Consolidated Financial Statements of Great Lakes Dredge & Dock
 Corporation and Subsidiaries for the years ended December 31, 1997, 1996
 and 1995................................................................  F-17
 
 
AMBOY AGGREGATES JOINT VENTURE
Report of Independent Public Accountants.................................  F-34
Balance Sheets of Amboy Aggregates (A Joint Venture) as of December 31,
 1997 and 1996...........................................................  F-35
Statements of Income and Partners' Capital of Amboy Aggregates (A Joint
 Venture) for the years ended December 31, 1997, 1996 and 1995...........  F-36
Statements of Cash Flows for Amboy Aggregates (A Joint Venture) for the
 years ended December 31, 1997, 1996 and 1995............................  F-37
Notes to Financial Statement for Amboy Aggregates (A Joint Venture)......  F-38
</TABLE>
 
                                      F-1
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                      CONDENSED CONSOLIDATED BALANCE SHEET
                                 JUNE 30, 1998
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                       JUNE 30,
                                                                         1998
                                                                       --------
<S>                                                                    <C>
                                    ASSETS
Current assets:
Cash and equivalents.................................................. $    550
Accounts receivable, net..............................................   43,517
Contract revenues in excess of billings...............................    6,728
Inventories...........................................................    9,626
Settlement advance....................................................   11,000
Prepaid expenses and other current assets.............................    8,898
                                                                       --------
  Total current assets................................................   80,319
Property and equipment, net...........................................  137,308
Inventories...........................................................    6,632
Investments in joint ventures.........................................    9,011
Other assets..........................................................    1,637
                                                                       --------
  Total assets........................................................ $234,907
                                                                       ========
                     LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable...................................................... $ 22,612
Accrued expenses and other............................................   18,322
Current maturities of long-term debt..................................      200
                                                                       --------
  Total current liabilities...........................................   41,134
Long-term debt........................................................   50,400
Deferred tax liability................................................   47,204
Other.................................................................   10,174
                                                                       --------
  Total liabilities...................................................  148,912
Minority interests....................................................    3,128
Commitments and contingencies (Note 7)................................
Stockholders' equity:
 Preferred stock--$.01 par value; authorized: 100; none issued........      --
 Common stock--no par value; authorized: 200; issued and outstanding:
  100.................................................................   60,000
 Retained earnings....................................................   22,867
                                                                       --------
  Total liabilities and stockholders' equity.......................... $234,907
                                                                       ========
</TABLE>
 
      See notes to unaudited condensed consolidated financial statements.
 
                                      F-2
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                  CONDENSED CONSOLIDATED STATEMENTS OF INCOME
                FOR THE SIX MONTHS ENDED JUNE 30, 1998 AND 1997
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                FOR THE SIX
                                                             MONTHS ENDED JUNE
                                                                    30,
                                                             ------------------
                                                               1998      1997
                                                             --------  --------
<S>                                                          <C>       <C>
Contract revenues........................................... $127,017  $108,372
Costs of contract revenues.................................. (105,933)  (98,462)
                                                             --------  --------
  Gross profit..............................................   21,084     9,910
General and administrative expenses.........................   (9,920)   (9,075)
                                                             --------  --------
  Operating income..........................................   11,164       835
Interest expense, net.......................................   (2,123)   (2,812)
Equity in earnings of joint ventures........................      414       588
                                                             --------  --------
Income (loss) before income taxes and minority interests....    9,455    (1,389)
Income tax (expense) benefit................................   (3,411)      915
Minority interests..........................................   (1,334)   (1,188)
                                                             --------  --------
  Net income (loss)......................................... $  4,710  $ (1,662)
                                                             ========  ========
</TABLE>
 
 
      See notes to unaudited condensed consolidated financial statements.
 
                                      F-3
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                FOR THE SIX MONTHS ENDED JUNE 30, 1998 AND 1997
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                              FOR THE SIX
                                                           MONTHS ENDED JUNE
                                                                  30,
                                                           ------------------
                                                             1998      1997
                                                           --------  --------
<S>                                                        <C>       <C>
OPERATING ACTIVITIES
Net income (loss)......................................... $  4,710  $ (1,662)
Adjustments to reconcile net income (loss) to net cash
 flows from operating activities:
  Depreciation............................................    7,327     6,907
  Earnings of joint ventures..............................     (414)     (588)
  Minority interests......................................    1,334     1,188
  Deferred income taxes...................................     (352)   (1,326)
  Gain on dispositions of property and equipment..........     (366)   (3,208)
  Other, net..............................................     (990)   (1,113)
  Changes in assets and liabilities:
    Accounts receivable...................................   (3,218)  (11,996)
    Contract revenues in excess of billings...............    8,780    (2,767)
    Inventories...........................................     (737)      422
    Prepaid expenses and other current assets.............    3,773      (557)
    Accounts payable, accrued expenses and other..........   (8,460)   11,372
                                                           --------  --------
  Net cash flows from operating activities................   11,387    (3,328)
INVESTING ACTIVITIES
Purchases of property and equipment.......................   (5,920)   (3,536)
Proceeds from dispositions of property and equipment......      366     5,147
Distribution to minority interest.........................      --       (700)
Deposit...................................................      --      2,500
                                                           --------  --------
  Net cash flows from investing activities................   (5,554)    3,411
FINANCING ACTIVITIES
Proceeds from long-term debt..............................   36,500    29,000
Repayments of long-term debt..............................  (43,500)  (17,326)
Settlement advance........................................      --    (11,000)
                                                           --------  --------
  Net cash flows from financing activities................   (7,000)      674
Net increase (decrease) in cash and equivalents...........   (1,167)      757
Cash and equivalents at beginning of period...............    1,717     1,887
                                                           --------  --------
Cash and equivalents at end of period..................... $    550  $  2,644
                                                           ========  ========
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for interest.................................... $  2,113  $  1,646
                                                           ========  ========
Cash paid for taxes....................................... $  3,135  $    338
                                                           ========  ========
</TABLE>
 
      See notes to unaudited condensed consolidated financial statements.
 
                                      F-4
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
             NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                 JUNE 30, 1998
                                  (UNAUDITED)
                                (IN THOUSANDS)
 
1. BASIS OF PRESENTATION
 
  The accompanying unaudited condensed consolidated financial statements have
been prepared in accordance with generally accepted accounting principles for
interim financial information. Accordingly, these financial statements do not
include all the information in the notes required by generally accepted
accounting principles for complete financial statements. In the opinion of
management, the unaudited condensed consolidated financial statements include
all adjustments (consisting of normal recurring adjustments) considered
necessary for a fair presentation of the financial position and results of
operations. The unaudited condensed consolidated financial statements and
notes herein should be read in conjunction with the audited consolidated
financial statements of the Company and the notes thereto.
 
2. ALLOCATION OF EQUIPMENT COST
 
  The Company can have significant fluctuations in equipment utilization
throughout the year. Accordingly, for interim reporting the Company prepays or
accrues fixed equipment costs and amortizes the expenses in proportion to
revenues recognized over the year to better match revenues and expenses.
 
3. ACCOUNTS RECEIVABLE
 
  Accounts receivable at June 30, 1998 are as follows:
 
<TABLE>
       <S>                                                              <C>
       Completed contracts............................................. $33,680
       Contracts in progress...........................................   6,720
       Retainage.......................................................   3,599
                                                                        -------
                                                                         43,999
       Allowance for doubtful accounts.................................    (482)
                                                                        -------
                                                                        $43,517
                                                                        =======
</TABLE>
 
4. CONTRACTS IN PROGRESS
 
  The components of contracts in progress at June 30, 1998 are as follows:
 
<TABLE>
   <S>                                                               <C>
   Cost and earnings in excess of billings:
     Accumulated costs and earnings for contracts in progress....... $ 43,705
     Amounts billed.................................................  (42,415)
                                                                     --------
   Cost and earnings in excess of billings for contracts in
    progress........................................................    1,290
   Cost and earnings in excess of billings for completed contracts..    5,438
                                                                     --------
                                                                     $  6,728
                                                                     ========
   Billings in excess of costs and earnings (included in accrued
    expenses and other):
     Amounts billed................................................. $(57,354)
     Accumulated costs and earnings for contracts in progress.......   54,708
                                                                     --------
                                                                     $ (2,646)
                                                                     ========
</TABLE>
 
 
                                      F-5
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--(UNAUDITED)--(CONTINUED)
 
5. INVESTMENTS IN JOINT VENTURES
 
  The Company has a 50% ownership interest in Amboy Aggregates Joint Venture,
whose primary business is the dredge mining and sale of fine aggregate, and a
14% ownership interest in a venture whose sole business is the performance of
a dredging contract in Argentina and Uruguay (Riovia S.A. Venture). Summarized
financial information of the joint ventures as of and for the five months
ended May 31, 1998 and 1997 is as follows:
 
<TABLE>
<CAPTION>
                                                             AMBOY     RIOVIA
                                                           AGGREGATES VENTURE
                                                           ---------- --------
   <S>                                                     <C>        <C>
   AS OF MAY 31, 1998
   Current assets.........................................  $  8,374  $ 23,829
   Non-current assets.....................................    15,908     1,900
                                                            --------  --------
     Total assets.........................................    24,282    25,729
   Current liabilities....................................    (2,536)   (8,585)
   Non-current liabilities................................   (11,272)   (9,490)
                                                            --------  --------
     Stockholders' equity.................................  $ 10,474  $  7,654
                                                            ========  ========
   FIVE MONTHS ENDED MAY 31, 1998
   Contract revenues......................................  $  5,973  $ 14,598
   Costs and expenses.....................................    (6,467)  (15,187)
                                                            --------  --------
     Net income...........................................  $   (494) $   (589)
                                                            ========  ========
   FIVE MONTHS ENDED MAY 31, 1997
   Contract revenues......................................  $  7,713
   Costs and expenses.....................................    (7,121)
                                                            --------
     Net income...........................................  $    592
                                                            ========
</TABLE>
 
6. LONG-TERM DEBT
 
  Long-term debt is as follows:
 
<TABLE>
       <S>                                                              <C>
       Bank debt:
         Revolving loan................................................ $50,000
         Other secured debt............................................     600
                                                                        -------
                                                                         50,600
       Current maturities of long-term debt............................    (200)
                                                                        -------
                                                                        $50,400
                                                                        =======
</TABLE>
 
  At June 30, 1998, the Company's average borrowing rate was 7.8%, including
amortization of financing fees. Letters of credit reducing the availability
under the revolving loan commitment were $10,200 as of June 30, 1998.
 
7. COMMITMENTS AND CONTINGENCIES
 
  At June 30, 1998, the Company is contingently liable, in the normal course
of business, for $1,237 in additional letters of credit related to contract
performance guarantees.
 
  In July 1998, the Company entered into an agreement to acquire two hydraulic
dredges, certain support vessels and operating inventory from a competitor for
approximately $14.5 million. The Company has contracted to build a backhoe
dredge for approximately $18.0 million for delivery in early 1999.
 
 
                                      F-6
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--(UNAUDITED)--(CONTINUED)
 
 
  In 1992, an underwater utility tunnel failed adjacent to a construction site
completed by Great Lakes Dredge & Dock Company, a wholly owned subsidiary of
Great Lakes Dredge & Dock Corporation. The failure resulted in a flooding of
the tunnel and building basements serviced by the tunnel. Numerous suits were
filed against Great Lakes Dredge & Dock Company for claims of flood damage to
building basements and losses due to business interruption. During 1997, all
outstanding claims related to the flood litigation were settled. Settlement
payments totaling $11,000 were advanced by the Company. Management believes
all such advances will be fully recovered through insurance proceeds in 1998.
 
8. SUBSEQUENT EVENTS
 
  On July 20, 1998, the Company, the stockholders of the Company and Vectura
Holdings, LLC entered into an Agreement and Plan of Merger providing for the
recapitalization of the Company. In order to fund and consummate the
recapitalization, it is anticipated that the Company will incur $115 million
in a senior subordinated notes offering, enter into a new bank credit facility
providing $110 million of capacity, and issue $50 million of capital stock to
Vectura Holdings, LLC and certain members of Company management. Following
consummation of the recapitalization, the Company will be the surviving
corporation with certain members of management holding approximately 16% in
aggregate of the outstanding common stock of the Company, as a result of
exercising stock options and the issuance of common stock.
 
9. SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION
 
  The payment obligations of the Company under the proposed senior
subordinated note offering are to be guaranteed by certain of the Company's
wholly owned domestic subsidiaries ("Subsidiary Guarantors"). Such guarantees
are full, unconditional and joint and several. Separate financial statements
of the Subsidiary Guarantors are not presented because the Company's
management has determined that they would not be material to investors. The
following supplemental financial information sets forth, on a combined basis,
the balance sheet, statements of income and statements of cash flows for the
Subsidiary Guarantors, the Company's non-guarantor subsidiaries and for the
Company (GLD Corporation).
 
                                      F-7
<PAGE>
 
            GREAT LAKES DREDGE AND DOCK CORPORATION AND SUBSIDIARIES
 NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--(UNAUDITED)--(CONTINUED)
 
CONDENSED CONSOLIDATING BALANCE SHEET AT JUNE 30, 1998
 
<TABLE>
<CAPTION>
                           GUARANTOR      OTHER         GLD                  CONSOLIDATED
                          SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTALS
                          ------------ ------------ ----------- ------------ ------------
<S>                       <C>          <C>          <C>         <C>          <C>
ASSETS
Current assets:
  Cash and equivalents..    $    458     $    92      $    --    $      --     $    550
  Accounts receivable,
   net..................      39,150       4,367           --           --       43,517
  Receivables from
   affiliates...........      21,068      12,455           --      (33,523)          --
  Current portion of net
   investment in direct
   financing leases.....       3,080       4,432           --       (7,512)          --
  Contract revenues in
   excess of billings...       6,728          --           --           --        6,728
  Inventories...........       6,704       2,922           --           --        9,626
  Settlement advance....      11,000          --           --           --       11,000
  Prepaid expenses and
   other current assets.       8,898          --           --           --        8,898
                            --------     -------      -------    ---------     --------
    Total current
     assets.............      97,086      24,268           --      (41,035)      80,319
Property and equipment,
 net....................     120,679      16,629           --           --      137,308
Net investment in direct
 financing leases.......       7,418      11,300           --      (18,718)          --
Investments in
 subsidiaries...........     164,976          --       82,866     (247,842)          --
Notes receivable from
 affiliates.............      36,415       1,549           --      (37,964)          --
Inventories.............       6,632          --           --           --        6,632
Investments in joint
 ventures...............       9,011          --           --           --        9,011
Other...................       1,637          --           --           --        1,637
                            --------     -------      -------    ---------     --------
                            $443,854     $53,746      $82,866    $(345,559)    $234,907
                            ========     =======      =======    =========     ========
LIABILITIES AND
 STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable......    $ 20,316     $ 2,286      $    --    $      10     $ 22,612
  Payable to affiliates.      31,127       2,396           --      (33,523)          --
  Accrued expenses and
   other................      15,119       3,203           --           --       18,322
  Current portion of
   obligations under
   capital leases.......          --       7,512           --       (7,512)          --
  Current maturities of
   long-term debt.......         200          --           --           --          200
                            --------     -------      -------    ---------     --------
    Total current
     liabilities........      66,762      15,397           --      (41,025)      41,134
Long-term debt..........      50,400          --           --           --       50,400
Obligations under
 capital leases.........          --      18,718           --      (18,718)          --
Note payable to
 affiliate..............      37,964          --           --      (37,964)          --
Deferred income taxes...      44,181       3,023           --           --       47,204
Other...................      10,103          71           --           --       10,174
                            --------     -------      -------    ---------     --------
    Total liabilities...     209,410      37,209           --      (97,707)     148,912
Minority interests......       3,266          --           --         (138)       3,128
Stockholders' equity....     231,178      16,537       82,866     (247,714)      82,867
                            --------     -------      -------    ---------     --------
                            $443,854     $53,746      $82,866    $(345,559)    $234,907
                            ========     =======      =======    =========     ========
</TABLE>
 
                                      F-8
<PAGE>
 
            GREAT LAKES DREDGE AND DOCK CORPORATION AND SUBSIDIARIES
 NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--(UNAUDITED)--(CONTINUED)
 
CONDENSED CONSOLIDATING STATEMENT OF INCOME FOR THE SIX MONTHS ENDED JUNE 30,
1998
 
<TABLE>
<CAPTION>
                          GUARANTOR      OTHER         GLD                  CONSOLIDATED
                         SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTALS
                         ------------ ------------ ----------- ------------ ------------
<S>                      <C>          <C>          <C>         <C>          <C>
Contract revenues.......   $104,930     $22,471      $   --      $  (384)    $ 127,017
Costs of contract
 revenues...............    (91,776)    (14,541)         --         (384)     (105,933)
                           --------     -------      ------      -------     ---------
  Gross profit..........     13,154       7,930          --           --        21,084
General and
 administrative
 expenses...............     (7,752)     (2,168)         --           --        (9,920)
                           --------     -------      ------      -------     ---------
  Operating income......      5,402       5,762          --           --        11,164
Interest expense, net...     (2,022)       (101)         --           --        (2,123)
Equity in earnings of
 subsidiaries...........         --          --       4,710       (4,710)           --
Equity in earnings of
 joint ventures.........        414          --          --           --           414
                           --------     -------      ------      -------     ---------
  Income before income
   taxes and minority
   interests............      3,794       5,661       4,710       (4,710)        9,455
Income tax expense......     (2,946)       (465)         --           --        (3,411)
Minority interests......     (1,334)         --          --           --        (1,334)
                           --------     -------      ------      -------     ---------
    Net income (loss)...   $   (486)    $ 5,196      $4,710      $(4,710)    $   4,710
                           ========     =======      ======      =======     =========
</TABLE>
 
                                      F-9
<PAGE>
 
            GREAT LAKES DREDGE AND DOCK CORPORATION AND SUBSIDIARIES
 NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--(UNAUDITED)--(CONTINUED)
 
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS FOR THE SIX MONTHS ENDED JUNE
30, 1998
 
<TABLE>
<CAPTION>
                           GUARANTOR      OTHER         GLD                  CONSOLIDATED
                          SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTALS
                          ------------ ------------ ----------- ------------ ------------
<S>                       <C>          <C>          <C>         <C>          <C>
OPERATING ACTIVITIES
Net income (loss).......    $   (486)    $ 5,196      $4,710      $(4,710)     $  4,710
Adjustments to reconcile
 net income (loss) to
 net cash flows from
 operating activities:
 Depreciation...........       5,313       2,014          --           --         7,327
 Earnings of
  subsidiaries and joint
  ventures..............        (414)         --      (4,710)       4,710          (414)
 Minority interests.....       1,334          --          --           --         1,334
 Deferred income taxes..        (352)         --          --           --          (352)
 Gain on dispositions of
  property and
  equipment.............        (366)         --          --           --          (366)
 Other, net.............      (1,488)        498          --           --          (990)
 Changes in assets and
  liabilities:
  Accounts receivable...       2,680      (5,898)         --           --        (3,218)
  Contract revenues in
   excess of billings...       8,079         701          --           --         8,780
  Inventories...........        (737)         --          --           --          (737)
  Prepaid expenses and
   other current assets.       3,773          --          --           --         3,773
  Accounts payable and
   accrued expenses.....      (6,849)     (1,611)         --           --        (8,460)
                            --------     -------      ------      -------      --------
 Net cash flows from
  operating activities..      10,487         900          --           --        11,387
INVESTING ACTIVITIES
Purchases of property
 and equipment..........      (5,769)       (151)         --           --        (5,920)
Proceeds from
 dispositions of
 property and equipment.         366          --          --           --           366
Principal payments
 received on direct
 financing leases.......      (1,986)      1,986          --           --            --
Payments received on
 notes receivable from
 affiliates.............        (345)        345          --           --            --
                            --------     -------      ------      -------      --------
 Net cash flows from
  investing activities..      (7,734)      2,180          --           --        (5,554)
FINANCING ACTIVITIES
Proceeds from long-term
 debt...................      36,500          --          --           --        36,500
Repayments of long-term
 debt...................     (43,500)         --          --           --       (43,500)
Principal payments on
 capital leases.........       3,420      (3,420)         --           --            --
                            --------     -------      ------      -------      --------
 Net cash flows from
  financing activities..      (3,580)     (3,420)         --           --        (7,000)
                            --------     -------      ------      -------      --------
Net decrease in cash and
 equivalents............        (827)       (340)         --           --        (1,167)
Cash and equivalents at
 beginning of period....       1,285         432          --           --         1,717
                            --------     -------      ------      -------      --------
Cash and equivalents at
 end of period..........    $    458     $    92      $   --      $    --      $    550
                            ========     =======      ======      =======      ========
</TABLE>
 
                                      F-10
<PAGE>
 
            GREAT LAKES DREDGE AND DOCK CORPORATION AND SUBSIDIARIES
 NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--(UNAUDITED)--(CONTINUED)
 
CONDENSED CONSOLIDATING STATEMENT OF INCOME FOR THE SIX MONTHS ENDED JUNE 30,
1997
 
<TABLE>
<CAPTION>
                          GUARANTOR      OTHER         GLD                  CONSOLIDATED
                         SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTALS
                         ------------ ------------ ----------- ------------ ------------
<S>                      <C>          <C>          <C>         <C>          <C>
Contract revenues.......   $75,842      $34,361      $           $(1,831)     $108,372
Costs of contract
 revenues...............   (73,881)     (26,412)          --      (1,831)      (98,462)
                           -------      -------      -------     -------      --------
  Gross profit..........     1,961        7,949           --          --         9,910
General and
 administrative
 expenses...............    (6,729)      (2,346)          --          --        (9,075)
                           -------      -------      -------     -------      --------
  Operating income
   (loss)...............    (4,768)       5,603           --          --           835
Interest expense, net...    (2,866)          54           --          --        (2,812)
Equity in earnings of
 subsidiaries...........        --           --       (1,662)      1,662            --
Equity in earnings of
 joint venture..........       588           --           --          --           588
                           -------      -------      -------     -------      --------
  Income (loss) before
   income taxes,
   minority interests...    (7,046)       5,657       (1,662)      1,662        (1,389)
Income tax benefit
 (expense)..............     1,391         (476)          --          --           915
Minority interests......    (1,188)          --           --          --        (1,188)
                           -------      -------      -------     -------      --------
    Net income (loss)...   $(6,843)     $ 5,181      $(1,662)    $ 1,662      $ (1,662)
                           =======      =======      =======     =======      ========
</TABLE>
 
                                      F-11
<PAGE>
 
            GREAT LAKES DREDGE AND DOCK CORPORATION AND SUBSIDIARIES
 NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--(UNAUDITED)--(CONTINUED)
 
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS FOR THE SIX MONTHS ENDED JUNE
30, 1997
 
<TABLE>
<CAPTION>
                           GUARANTOR      OTHER         GLD                  CONSOLIDATED
                          SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTALS
                          ------------ ------------ ----------- ------------ ------------
<S>                       <C>          <C>          <C>         <C>          <C>
OPERATING ACTIVITIES
Net income (loss).......    $(6,843)     $  5,181     $(1,662)     $1,662      $ (1,662)
Adjustments to reconcile
 net income (loss) to
 net cash flows from
 operating activities:
 Depreciation...........      5,044         1,863          --          --         6,907
 Earnings of
  subsidiaries and joint
  ventures..............       (588)           --       1,662      (1,662)         (588)
 Minority interests.....      1,188            --          --          --         1,188
 Deferred income taxes..     (1,326)           --          --          --        (1,326)
 Gain on dispositions of
  property and
  equipment.............     (3,208)           --          --          --        (3,208)
 Other, net.............     (4,024)        2,911          --          --        (1,113)
 Changes in assets and
  liabilities:
  Accounts receivable...        160       (12,156)         --          --       (11,996)
  Contract revenues in
   excess of billings...     (4,746)        1,979          --          --        (2,767)
  Inventories...........        422            --          --          --           422
  Prepaid expenses and
   other current assets.       (557)           --          --          --          (557)
  Accounts payable and
   accrued expenses.....      6,658         4,714          --          --        11,372
                            -------      --------     -------      ------      --------
 Net cash flows from
  operating activities..     (7,820)        4,492          --          --        (3,328)
INVESTING ACTIVITIES
Purchases of property
 and equipment..........     (3,028)         (508)         --          --        (3,536)
Proceeds from
 dispositions of
 property and equipment.      5,147            --          --          --         5,147
Distribution to minority
 interest...............         --          (700)         --          --          (700)
Principal payments
 received on direct
 financing leases.......     (1,722)        1,722          --          --            --
Payments received on
 notes receivable from
 affiliate..............       (686)          686          --          --            --
Deposit.................      2,500            --          --          --         2,500
                            -------      --------     -------      ------      --------
 Net cash flows from
  investing activities..      2,211         1,200          --          --         3,411
FINANCING ACTIVITIES
Proceeds from long-term
 debt...................     29,000            --          --          --        29,000
Repayments of long-term
 debt...................    (17,326)           --          --          --       (17,326)
Principal payments on
 capital leases.........      3,027        (3,027)         --          --            --
Settlement advance......    (11,000)           --          --          --       (11,000)
                            -------      --------     -------      ------      --------
 Net cash flows from
  financing activities..      3,701        (3,027)         --          --           674
                            -------      --------     -------      ------      --------
Net increase (decrease)
 in cash and
 equivalents............     (1,908)        2,665          --          --           757
Cash and equivalents at
 beginning of period....        570         1,317          --          --         1,887
                            -------      --------     -------      ------      --------
Cash and equivalents at
 end of period..........    $(1,338)     $  3,982          --          --      $  2,644
                            =======      ========     =======      ======      ========
</TABLE>
 
                                      F-12
<PAGE>
 
                         INDEPENDENT AUDITORS' REPORT
 
To the Board of Directors and
 Stockholders of Great Lakes Dredge
 & Dock Corporation:
 
  We have audited the accompanying consolidated balance sheets of Great Lakes
Dredge & Dock Corporation and subsidiaries (the Company) as of December 31,
1997 and 1996, and the related consolidated statements of income and retained
earnings, and cash flows for each of the three years in the period ended
December 31, 1997. These financial statements are the responsibility of the
Company's management. Our responsibility is to express an opinion on these
financial statements based on our audits.
 
  We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.
 
  In our opinion, such consolidated financial statements present fairly, in
all material respects, the financial position of Great Lakes Dredge & Dock
Corporation and subsidiaries at December 31, 1997 and 1996, and the results of
their operations and their cash flows for each of the three years in the
period ended December 31, 1997 in conformity with generally accepted
accounting principles.
 
DELOITTE & TOUCHE LLP
 
Chicago, Illinois
January 30, 1998
 
                                     F-13
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                          CONSOLIDATED BALANCE SHEETS
                           DECEMBER 31, 1997 AND 1996
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                1997     1996
                                                              -------- --------
<S>                                                           <C>      <C>
ASSETS
Current assets:
  Cash and equivalents....................................... $  1,717 $  1,887
  Accounts receivable, net...................................   40,299   28,057
  Contract revenues in excess of billings....................   15,508   11,252
  Inventories................................................    9,195    9,910
  Settlement advance.........................................   11,000       --
  Prepaid expenses...........................................    5,118    2,875
  Deposit....................................................       --    2,500
  Net assets of discontinued operations......................       --    1,929
  Other current assets.......................................    8,319    8,383
                                                              -------- --------
    Total current assets.....................................   91,156   66,793
Property and equipment, net..................................  138,716  142,966
Inventories..................................................    6,326    6,875
Investments in joint ventures................................    7,569    4,807
Other assets.................................................    1,788      617
                                                              -------- --------
                                                              $245,555 $222,058
                                                              ======== ========
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable........................................... $ 31,001 $ 20,104
  Accrued expenses...........................................   15,419   11,001
  Billings in excess of contract revenues....................    2,974      326
  Current maturities of long-term debt.......................      200   13,322
                                                              -------- --------
    Total current liabilities................................   49,594   44,753
Long-term debt...............................................   57,400   39,114
Deferred income taxes........................................   48,322   52,061
Foreign income taxes.........................................    5,078    2,382
Other........................................................    5,149    6,180
                                                              -------- --------
    Total liabilities........................................  165,543  144,490
Minority interests...........................................    1,856    3,214
Commitments and contingencies (Notes 10 and 15)
Stockholders' equity:
  Preferred stock--$.01 par value; authorized: 100; none
   issued....................................................       --       --
  Common stock--no par value; authorized: 200; issued and
   outstanding: 100..........................................   60,000   60,000
  Retained earnings..........................................   18,156   14,354
                                                              -------- --------
    Total stockholders' equity...............................   78,156   74,354
                                                              -------- --------
                                                              $245,555 $222,058
                                                              ======== ========
</TABLE>
 
                See notes to consolidated financial statements.
 
                                      F-14
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
            CONSOLIDATED STATEMENTS OF INCOME AND RETAINED EARNINGS
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                    1997      1996      1995
                                                  --------  --------  --------
<S>                                               <C>       <C>       <C>
Contract revenues................................ $258,296  $235,871  $226,865
Costs of contract revenues....................... (228,383) (208,717) (217,077)
                                                  --------  --------  --------
  Gross profit...................................   29,913    27,154     9,788
General and administrative expenses..............  (18,922)  (16,391)  (15,870)
                                                  --------  --------  --------
  Operating income (loss)........................   10,991    10,763    (6,082)
Other income (expense):
  Interest income................................      316       138       380
  Interest expense...............................   (6,303)   (6,182)   (8,242)
  Equity in earnings of joint ventures...........    3,132     1,139     1,333
                                                  --------  --------  --------
    Income (loss) before income taxes, minority
     interests and discontinued operations.......    8,136     5,858   (12,611)
Income tax (expense) benefit.....................   (2,667)   (2,324)    4,160
Minority interests...............................   (1,667)     (419)   (1,204)
                                                  --------  --------  --------
  Income (loss) from continuing operations.......    3,802     3,115    (9,655)
Discontinued operations
  Loss from operations, net of tax benefit: 1997-
   $0; 1996-$695; and 1995-$163 .................       --    (1,044)     (329)
  Loss on disposal, net of tax benefit of $44 in
   1996..........................................       --       (65)       --
                                                  --------  --------  --------
    Net income (loss)............................    3,802     2,006    (9,984)
Retained earnings at beginning of year...........   14,354    12,348    22,332
                                                  --------  --------  --------
Retained earnings at end of year................. $ 18,156  $ 14,354  $ 12,348
                                                  ========  ========  ========
</TABLE>
 
 
                See notes to consolidated financial statements.
 
                                      F-15
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                   1997      1996      1995
                                                 --------  --------  --------
<S>                                              <C>       <C>       <C>
OPERATING ACTIVITIES
Net income (loss)............................... $  3,802  $  2,006  $ (9,984)
Adjustments to reconcile net income (loss) to
 net cash flows from operating activities:
  Depreciation..................................   13,615    13,881    14,700
  Earnings of joint ventures....................   (3,132)   (1,139)   (1,333)
  Minority interests............................    1,667       419     1,204
  Deferred income taxes.........................   (3,963)   (3,796)   (1,352)
  Gain on dispositions of property and
   equipment....................................   (3,308)     (467)   (1,496)
  Foreign income taxes..........................    2,696     2,382        --
  Pension curtailment and settlement............       --    (1,688)       --
  Other, net....................................     (238)      217         6
  Changes in assets and liabilities:
    Accounts receivable.........................  (12,242)   20,945     5,043
    Contract revenues in excess of billings.....   (4,256)    3,094     3,472
    Inventories.................................    1,264     3,915    (3,714)
    Prepaid expenses and other current assets...     (250)     (402)    2,110
    Income taxes receivable.....................       --     3,509    (3,509)
    Accounts payable and accrued expenses.......   15,315   (15,881)   (8,500)
    Billings in excess of contract revenues.....    2,648    (2,321)     (396)
                                                 --------  --------  --------
  Net cash flows from operating activities......   13,618    24,674    (3,749)
INVESTING ACTIVITIES
Purchases of property and equipment.............  (11,494)   (5,411)  (11,473)
Dispositions of property and equipment..........    5,437     7,820     2,664
Distributions from joint venture................    1,000       750     5,500
Investments in joint venture....................     (630)     (755)       --
Distribution to minority interests..............   (3,025)     (700)     (640)
Deposit.........................................    2,500    (2,500)       --
                                                 --------  --------  --------
  Net cash flows from investing activities......   (6,212)     (796)   (3,949)
FINANCING ACTIVITIES
Proceeds from long-term debt....................  102,500    27,051    52,700
Repayments of long-term debt....................  (97,336)  (51,368)  (46,220)
Financing fees..................................   (1,740)       --        --
Settlement advance..............................  (11,000)       --        --
                                                 --------  --------  --------
  Net cash flows from financing activities......   (7,576)  (24,317)    6,480
                                                 --------  --------  --------
Net decrease in cash and equivalents............     (170)     (439)   (1,218)
Cash and equivalents at beginning of year.......    1,887     2,326     3,544
                                                 --------  --------  --------
Cash and equivalents at end of year............. $  1,717  $  1,887  $  2,326
                                                 ========  ========  ========
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for interest.......................... $  5,407  $  6,131  $  7,100
                                                 ========  ========  ========
Cash paid for taxes............................. $  4,588  $  1,492  $  5,047
                                                 ========  ========  ========
</TABLE>
 
                See notes to consolidated financial statements.
 
                                      F-16
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                (IN THOUSANDS)
 
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
 ORGANIZATION
 
  Great Lakes Dredge & Dock Corporation ("GLD Corporation") is wholly owned by
Blackstone Limited Partnerships. GLD Corporation and its subsidiaries (the
Company) are in the business of marine construction, primarily dredging. The
Company's primary customers are domestic and foreign government agencies.
 
 PRINCIPLES OF CONSOLIDATION AND BASIS OF PRESENTATION
 
  The consolidated financial statements include the accounts of GLD
Corporation and its subsidiaries. All significant intercompany accounts and
transactions are eliminated. The Company is a joint venture partner in Amboy
Aggregates Joint Venture and Riovia S.A. which are accounted for under the
equity method.
 
 USE OF ESTIMATES
 
  The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect certain reported amounts and disclosures. Accordingly,
actual results could differ from those estimates.
 
 REVENUE AND COST RECOGNITION ON CONTRACTS
 
  Contract revenues are recognized under the percentage-of-completion method,
based on the Company's engineering estimates of the physical percentage
completed of each project. Billings on contracts are generally submitted after
verification with the customers of physical quantities completed. Costs of
contract revenues are adjusted to reflect the gross profit percentage expected
to be achieved upon ultimate completion of each project. Significant
expenditures incurred incidental to major contracts are deferred and
recognized as contract costs based on contract performance over the duration
of the related project. These expenditures are reported as prepaid expenses.
Provisions for estimated losses on contracts in progress are made in the
period in which such losses are determined. Claims for additional compensation
due the Company are not recognized in contract revenues until such claims are
settled.
 
 CLASSIFICATION OF CURRENT ASSETS AND LIABILITIES
 
  The Company includes in current assets and liabilities amounts realizable
and payable in the normal course of contract completion unless completion of
such contracts extends significantly beyond one year.
 
 CASH EQUIVALENTS
 
  The Company considers all highly liquid investments purchased with a
maturity of three months or less to be cash equivalents.
 
 INVENTORIES
 
  Inventories are recorded at the lower of first-in, first-out cost or market.
Inventories consist mainly of pipe, purchased spare parts and supplies.
 
 DEPRECIATION
 
  Depreciation is calculated over the estimated useful lives of property and
equipment using the straight-line method. The estimated useful lives by class
of assets are 5 to 10 years for furniture and fixtures and 3 to 25 years for
operating equipment.
 
                                     F-17
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
 FAIR VALUE OF FINANCIAL INSTRUMENTS
 
  The carrying value of financial instruments included in current assets and
liabilities approximates fair values due to the short-term maturities of these
instruments. The carrying value of long-term debt is a reasonable estimate of
its fair value as interest rates are variable, based on the prevailing market
rates. The contract amount of letters of credit and guarantees is a reasonable
estimate of their fair value as the value for each is fixed over the life of
the commitment.
 
 LONG-LIVED ASSETS
 
  Long lived assets are reviewed for possible impairment whenever events
indicate that the carrying amount of such assets may not be recoverable. If
such a review indicates an impairment, the carrying amount would be reduced to
estimated recoverable value.
 
 CAPITAL STOCK
 
  In 1996, the Company authorized an additional 100 shares of common stock and
effected a 5 for 1 stock split of the common shares outstanding.
 
  The authorized capital stock of the Company includes 100 shares of preferred
stock, which the Board of Directors is authorized to issue and to establish
the dividend, redemption, voting and other rights, preferences, privileges and
restrictions of such issues. No shares of preferred stock are outstanding as
of December 31, 1997.
 
 RECLASSIFICATIONS
 
  Certain amounts in the 1996 and 1995 consolidated financial statements have
been reclassified to conform to the 1997 presentation.
 
 EFFECTS OF RECENTLY ISSUED ACCOUNTING STANDARDS
 
  In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130, "Reporting Comprehensive Income"
("SFAS 130"), and Statement of Financial Accounting Standards No. 131,
"Disclosures about Segments of an Enterprise and Related Information" ("SFAS
131"), which could require the Company to make additional disclosures in its
financial statements no later than for the year ending December 31, 1998. SFAS
130 defines comprehensive income, which includes items in addition to those
reported in the statement of operations, and requires disclosures about its
components. Management is presently evaluating the effect on the Company's
financial reporting from the adoption of this statement and does not expect it
to have any material effect. SFAS 131 requires disclosures for each segment of
a business and the determination of segments based on the Company's internal
management structure. Management is in the process of evaluating the impact on
the Company's financial reporting from the adoption of this statement.
 
2. ACCOUNTS RECEIVABLE
 
  Accounts receivable are as follows:
 
<TABLE>
<CAPTION>
                                                                1997     1996
                                                               -------  -------
     <S>                                                       <C>      <C>
     Completed contracts...................................... $13,797  $14,151
     Contracts in progress....................................  22,831    7,497
     Retainage................................................   4,121    6,713
                                                               -------  -------
                                                                40,749   28,361
     Allowance for doubtful accounts..........................    (450)    (304)
                                                               -------  -------
                                                               $40,299  $28,057
                                                               =======  =======
</TABLE>
 
                                     F-18
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
3. CONTRACTS IN PROGRESS
 
  The components of contracts in progress are as follows:
 
<TABLE>
<CAPTION>
                                                              1997      1996
                                                            --------  ---------
     <S>                                                    <C>       <C>
     Cost and earnings in excess of billings:
       Costs and earnings for contracts in progress.......  $ 56,981  $ 138,578
       Prepaid contract costs.............................    (1,053)    (1,786)
       Amounts billed.....................................   (45,575)  (129,162)
                                                            --------  ---------
     Cost and earnings in excess of billings for contracts
      in progress.........................................    10,353      7,630
     Cost and earnings in excess of billings for completed
      contracts...........................................     5,155      3,622
                                                            --------  ---------
                                                            $ 15,508  $  11,252
                                                            ========  =========
     Billings in excess of costs and earnings:
       Amounts billed.....................................  $(44,870) $  (9,723)
       Costs and earnings for contracts in progress.......    41,896      9,397
                                                            --------  ---------
                                                            $ (2,974) $    (326)
                                                            ========  =========
</TABLE>
 
4. PROPERTY AND EQUIPMENT
 
  Property and equipment are as follows:
 
<TABLE>
<CAPTION>
                                                               1997      1996
                                                             --------  --------
     <S>                                                     <C>       <C>
     Land................................................... $  2,604  $  2,604
     Furniture and fixtures.................................    5,652     5,509
     Operating equipment....................................  203,784   196,010
                                                             --------  --------
                                                              212,040   204,123
     Accumulated depreciation...............................  (73,324)  (61,157)
                                                             --------  --------
                                                             $138,716  $142,966
                                                             ========  ========
</TABLE>
 
  Performance bonds are customarily required for dredging and marine
construction projects. The Company obtains its performance bonds through a
bonding agreement with a group of insurance companies that have been granted a
security interest in a substantial portion of the Company's operating
equipment with a net book value of approximately $62,558 at December 31, 1997.
The bonding agreement contains financial and operating covenants that limit
the ability of the Company to incur indebtedness, create liens, pay dividends
and take certain other actions.
 
  In 1996, the Company paid $2,500 for an option to purchase a used hopper
dredge. The option price was recorded as a current asset deposit. In 1997, the
Company recovered this amount through a lease transaction.
 
                                     F-19
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
5. INVESTMENTS IN JOINT VENTURES
 
  The Company has a 50% ownership interest in a venture whose primary business
is the dredge mining and sale of fine aggregate (Aggregate Venture), and a 14%
ownership interest in a venture whose sole business is the performance of a
dredging contract in Argentina and Uruguay. Summarized financial information
of the combined joint ventures for 1997 and 1996 and of the Aggregate Venture
for 1995 is as follows:
 
<TABLE>
<CAPTION>
                                                       DECEMBER 31, DECEMBER 31,
                                                           1997         1996
                                                       ------------ ------------
     <S>                                               <C>          <C>
     Current assets...................................   $ 35,793     $ 12,160
     Non-current assets...............................     19,627       23,227
                                                         --------     --------
     Total assets.....................................     55,420       35,387
     Current liabilities..............................    (16,735)     (10,780)
     Non-current liabilities..........................    (10,737)     (12,215)
                                                         --------     --------
       Equity.........................................   $ 27,948     $ 12,392
                                                         ========     ========
</TABLE>
 
<TABLE>
<CAPTION>
                                             FOR THE YEARS ENDED DECEMBER 31,
                                             ----------------------------------
                                                1997        1996        1995
                                             ----------  ----------  ----------
     <S>                                     <C>         <C>         <C>
     Revenues............................... $   67,498  $   24,777  $   15,825
     Costs and expenses.....................    (54,364)    (23,437)    (13,160)
                                             ----------  ----------  ----------
       Net income........................... $   13,134  $    1,340  $    2,665
                                             ==========  ==========  ==========
</TABLE>
 
  The Aggregate Venture has a mortgage loan with a bank, which contains
certain restrictive covenants, including limitations on the amount of
distributions to its joint venture partners. The Company has guaranteed 50% of
the outstanding mortgage principal and accrued interest which totaled $5,850
at December 31, 1997.
 
  In 1997, the Company paid royalties of $1,549 to the Aggregate Venture for
the right to mine sand related to performance of a contract of the Company. In
1996 and 1995, the Company provided dredging and towing services to the
Aggregate Venture and recorded revenue of $735 and $1,408, respectively, for
these services. As of December 31, 1996, $545 of the amount earned in 1996 was
included in accounts receivable.
 
6. ACCRUED EXPENSES
 
  Accrued expenses are as follows:
 
<TABLE>
<CAPTION>
                                                                 1997    1996
                                                                ------- -------
     <S>                                                        <C>     <C>
     Insurance................................................. $ 5,501 $ 4,128
     Income and other taxes....................................   5,138     467
     Payroll and employee benefits.............................   2,835   2,493
     Rentals...................................................      --   2,279
     Other.....................................................   1,945   1,634
                                                                ------- -------
                                                                $15,419 $11,001
                                                                ======= =======
</TABLE>
 
                                     F-20
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
7. LONG-TERM DEBT
 
  Long-term debt is as follows:
 
<TABLE>
<CAPTION>
                                                               1997      1996
                                                              -------  --------
     <S>                                                      <C>      <C>
     Bank debt:
       New credit facility revolving loan.................... $57,000  $     --
       Revolving loan........................................      --    31,000
       Term loan.............................................      --    20,084
     Other secured debt......................................     600     1,352
                                                              -------  --------
                                                               57,600    52,436
     Current maturities of long-term debt....................    (200)  (13,322)
                                                              -------  --------
                                                              $57,400  $ 39,114
                                                              =======  ========
</TABLE>
 
  In September 1997, the Company entered into a new revolving credit
agreement. The new credit agreement (Credit Agreement), expiring in 2002, is a
$100,000 aggregate revolving loan commitment of which $50,000 may be used for
letters of credit. At December 31, 1997, availability under the aggregate
commitment for both borrowings and letters of credit was $26,994. The terms of
the Credit Agreement provide for interest rate spreads based on the Company's
debt level compared to earnings, as defined, and allow for various interest
rate options for loan amounts and periods that are selected at the discretion
of the Company. At December 31, 1997 and 1996, the Company's average borrowing
rate was 8.0% and 8.7%, respectively, including amortization of financing
fees. The Company also pays an annual commitment fee of up to 0.5% on the
average daily unused capacity available under the credit commitment.
 
  The Credit Agreement contains provisions that require the Company to
maintain a minimum net worth and certain other financial ratios, limit payment
of dividends and restrict certain other transactions. Borrowings under the
Credit Agreement are secured by first lien mortgages on certain operating
equipment of the Company with a net book value of approximately $34,968 at
December 31, 1997 and are guaranteed by certain subsidiaries of the Company.
 
  No principal payments are required; however, the total commitment is reduced
by $5,333 semi-annually beginning March 24, 2001. The Company may voluntarily
reduce the amount of the commitment at any time.
 
8. INCOME TAXES
 
  The provision for income taxes is as follows:
 
<TABLE>
<CAPTION>
                                                      1997     1996     1995
                                                     -------  -------  -------
     <S>                                             <C>      <C>      <C>
     Federal:
       Current U.S. ................................ $ 2,372  $ 3,070  $(3,337)
       Current foreign..............................   3,112    2,268      384
       Deferred.....................................  (3,386)  (3,396)  (1,559)
     State:
       Current......................................   1,146      782      145
       Deferred.....................................    (577)    (400)     207
                                                     -------  -------  -------
     Income tax expense (benefit)................... $ 2,667  $ 2,324  $(4,160)
                                                     =======  =======  =======
</TABLE>
 
                                     F-21
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  The deferred income tax benefit is as follows:
 
<TABLE>
<CAPTION>
                                                       1997     1996     1995
                                                      -------  -------  -------
     <S>                                              <C>      <C>      <C>
     Depreciation.................................... $(3,940) $(5,153) $  (860)
     Insurance.......................................    (237)     251     (641)
     Pension termination.............................      --      848       --
     Accrued claims..................................      --      540     (412)
     Royalties.......................................      --       --      308
     Other...........................................     214     (282)     253
                                                      -------  -------  -------
                                                      $(3,963) $(3,796) $(1,352)
                                                      =======  =======  =======
</TABLE>
 
  The Company's effective tax rate and the statutory U.S. federal income tax
rate are reconciled as follows:
 
<TABLE>
<CAPTION>
                                                               1997  1996  1995
                                                               ----  ----  ----
     <S>                                                       <C>   <C>   <C>
     Statutory U.S. federal income tax rate................... 35.0% 35.0% 35.0%
     State income tax, net of federal income tax benefit......  4.6   4.3   1.8
     Partnership gain allocated to minority interest.......... (6.0)  (.6) (2.3)
     Other.................................................... (0.8)  1.0  (1.5)
                                                               ----  ----  ----
       Effective tax rate..................................... 32.8% 39.7% 33.0%
                                                               ====  ====  ====
</TABLE>
 
  The deferred tax liabilities (assets) are as follows:
 
<TABLE>
<CAPTION>
                                                               1997     1996
                                                              -------  -------
     <S>                                                      <C>      <C>
     Gross deferred tax liabilities:
       Depreciation.......................................... $47,435  $51,405
       Other.................................................   2,509    2,610
                                                              -------  -------
                                                               49,944   54,015
     Gross deferred tax assets:
       Accrued liabilities...................................  (3,919)  (4,027)
                                                              -------  -------
                                                               46,025   49,988
     Net current deferred tax assets (included in other
      current assets)........................................   2,297    2,073
                                                              -------  -------
     Net non-current deferred tax liabilities................ $48,322  $52,061
                                                              =======  =======
</TABLE>
 
9. DISCONTINUED OPERATIONS
 
  In April 1997, the Company completed the sale of its non-core aggregate
towing business segment. The segment was reported as discontinued operations
for 1996 and 1995. Revenues from the discontinued segment were $1,575 and
$6,927 for 1996 and 1995, respectively. In 1996 net assets of the discontinued
operation consisted primarily of property, plant and equipment.
 
                                     F-22
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
10. LEASE COMMITMENTS
 
  The Company leases certain operating equipment and office facilities under
long-term operating leases expiring at various dates through 2009. The leases
contain renewal or purchase options which specify prices at the then fair
market value upon the expiration of the equipment leases. Future minimum lease
payments for the years ending December 31 are as follows:
 
<TABLE>
       <S>                                                              <C>
       1998............................................................ $ 6,115
       1999............................................................   5,967
       2000............................................................   5,931
       2001............................................................   5,882
       2002............................................................   5,819
       Thereafter......................................................  26,605
                                                                        -------
         Total minimum lease payments.................................. $56,319
                                                                        =======
</TABLE>
 
  Total rent expense for the years ended December 31, 1997, 1996, and 1995 was
$16,457, $19,926 and $12,979, respectively.
 
11. RETIREMENT PLANS
 
  The Company sponsors a 401(k) savings plan (Plan) covering substantially all
non-union employees. Under the Plan, individual employees may contribute a
percentage of compensation and the Company will match a portion of the
employees' contributions. Effective October 1, 1996, the Company amended the
Plan to add a profit-sharing component, permitting the Company to make
discretionary employer contributions to all eligible employees of the Plan.
The Company's expense for matching and discretionary contributions was $1,732,
$716, and $562 for 1997, 1996 and 1995, respectively.
 
  The Company sponsored a non-contributory defined pension plan (Pension Plan)
covering substantially all non-union employees. The Pension Plan provided
pension benefits upon retirement, based on compensation and years of service
as defined in the plan. The Company's policy was to fund the Pension Plan as
required by ERISA.
 
  During 1996, the Company terminated the Pension Plan. The Pension Plan's
liabilities were settled in December 1996 through a combination of lump sum
payouts and rollovers, and a group annuity contract. The Company recognized a
$2,440 curtailment gain and a $752 settlement loss on the termination of the
Pension Plan. The components of net pension expense for the years ended
December 31, 1996 and 1995 were as follows:
 
<TABLE>
<CAPTION>
                                                                1996     1995
                                                               -------  -------
     <S>                                                       <C>      <C>
     Service cost............................................. $   488  $   516
     Interest on projected benefit obligation.................     541      541
     Actual return on plan assets.............................    (654)  (1,142)
     Net deferral and amortization............................      57      600
     Curtailment gain net of settlement loss..................  (1,688)      --
                                                               -------  -------
                                                               $(1,256) $   515
                                                               =======  =======
</TABLE>
 
                                     F-23
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  Actuarial assumptions used in accounting for the pension plan for 1996 and
1995 were as follows:
 
<TABLE>
       <S>                                                                 <C>
       Discount rate...................................................... 7.00%
       Long term rate of return on assets................................. 9.50
       Rate of increase in compensation levels............................ 6.20
</TABLE>
 
  The Company also contributes to various multi-employer pension plans
pursuant to collective bargaining agreements. In the event of a plan's
termination or Company withdrawal from a plan, the Company may be liable for a
portion of the plan's unfunded vested benefits. As of December 31, 1997,
unfunded amounts, if any, are not significant. Contributions to multi-employer
pension plans for the years ended December 31, 1997, 1996 and 1995 were
$2,173, $2,593 and $2,252, respectively.
 
12. STOCK PLANS
 
  The Equity Incentive Plan of Great Lakes Dredge & Dock Corporation (the
Plan) provides for the grant of options and other stock-based awards to
management personnel designated by the Compensation Committee. Awards up to an
aggregate of 5.0% of authorized shares of common stock may be granted under
the Plan. On January 1, 1992, options were granted on 3.7% of authorized
shares of common stock at an exercise price of $600,000 per share representing
the estimated fair market value of the shares on the grant date (as defined in
the Agreement). Options become exercisable for 20% of the granted option
shares on each of the first five anniversaries of the grant date and remain
exercisable until the tenth anniversary. New options were granted during 1996
equal in number to those options forfeited in 1996 and with vesting provisions
as if such options had been granted on January 1, 1992. All options granted
are fully vested and outstanding as of December 31, 1997.
 
  The Company uses Accounting Principles Board Opinion No. 25, "Accounting for
Stock Issued to Employees," in accounting for its employee stock options.
Statement of Financial Accounting Standards No. 123, "Accounting for Stock-
Based Compensation" (SFAS No. 123) requires disclosures of the effect to net
income as if SFAS No. 123 had been adopted. The effects of applying SFAS No.
123 are not material to the Company's financial statements.
 
  The Great Lakes Dredge & Dock Corporation Employee Stock Purchase Plan (the
Stock Plan) provides eligible employees with an option to purchase shares of
common stock at a discount to market price. The Stock Plan is considered non-
compensatory and is intended to qualify under Section 423 of the Internal
Revenue Code. An aggregate of 0.4% of authorized shares of common stock may be
granted pursuant to the Stock Plan. The Compensation Committee may grant
options at such times as it, in its discretion, determines but must grant them
to all eligible employees. As of December 31, 1997, no options have been
granted.
 
13. MAJOR CUSTOMERS
 
  In 1997, 1996 and 1995, contract revenues earned from contracts with federal
government agencies were 47.4%, 35.8% and 30.2%, respectively. In 1997, 1996
and 1995, contract revenues earned from a contract with a state port authority
were 10.1%, 11.8% and 13.6%, respectively. An additional 9.5%, 10.9% and 15%,
were earned from contracts with a foreign government in 1997, 1996 and 1995,
respectively.
 
14. FOREIGN OPERATIONS
 
  The Company derived revenues and gross profit from foreign project
operations, for the years ended December 31, as follows:
 
<TABLE>
<CAPTION>
                                                     1997      1996      1995
                                                   --------  --------  --------
     <S>                                           <C>       <C>       <C>
     Contract revenues............................ $ 55,919  $ 58,166  $ 53,910
     Costs of contract revenues...................  (48,695)  (49,324)  (48,866)
                                                   --------  --------  --------
     Gross profit................................. $  7,224  $  8,842  $  5,044
                                                   ========  ========  ========
</TABLE>
 
 
                                     F-24
<PAGE>
 
            GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
15. COMMITMENTS AND CONTINGENCIES
 
  At December 31, 1997 and 1996, the Company was contingently liable, in the
normal course of business, for $1,237 and $1,500, respectively, in letters of
credit related to contract performance guarantees.
 
  In 1992, an underwater utility tunnel failed adjacent to a construction site
completed by Great Lakes Dredge & Dock Company (GLDD), a wholly owned
subsidiary of GLD Corporation. The failure resulted in a flooding of the
tunnel and building basements serviced by the tunnel. Numerous suits were
filed against GLDD for claims of flood damage to building basements and losses
due to business interruption. During 1997, all outstanding claims were settled
related to the flood litigation. Settlement payments totaling $11,000 were
advanced by the Company. Management believes all such advances will be fully
recovered through insurance proceeds in 1998.
 
  In the normal course of business, the Company is a defendant in various
other legal proceedings. Resolution of these claims is not expected to have a
material impact on the financial position or operations of the Company.
 
  As is customary with negotiated contracts with the federal government, the
government has the right to audit the books and records of the Company to
ensure compliance with such contracts and applicable federal laws. The
government has the ability to seek a price adjustment based on the results of
such audit. Any such audits are not expected to have a material impact on the
financial position or operations of the Company.
 
16. SUBSEQUENT EVENTS--UNAUDITED
 
  On July 20, 1998, the Company, the stockholders of the Company and Vectura
Holdings, LLC entered into an Agreement and Plan of Merger providing for the
recapitalization of the Company. In order to fund and consummate the
recapitalization, it is anticipated that the Company will incur $115 million
in a senior subordinated notes offering, enter into a new bank credit facility
providing $110 million of capacity, and issue $50 million of capital stock to
Vectura Holdings, LLC and certain members of Company management. Following
consummation of the recapitalization, the Company will be the surviving
corporation with certain members of management holding approximately 16% in
aggregate of the outstanding common stock of the Company, as a result of
exercising stock options and the issuance of common stock.
 
17. SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION
 
  The payment obligations of the Company under the proposed senior
subordinated note offering described above are to be guaranteed by the
Company's wholly-owned domestic subsidiaries ("Subsidiary Guarantors"). Such
guarantees are full, unconditional and joint and several. Separate financial
statements of the Subsidiary Guarantors are not presented because the
Company's management has determined that they would not be material to
investors. The following supplemental financial information sets forth, on a
combined basis, balance sheets, statements of income and statements of cash
flows for the Subsidiary Guarantors, the Company's non-guarantor subsidiaries
and for the Company.
 
                                     F-25
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
CONDENSED CONSOLIDATING BALANCE SHEET AT DECEMBER 31, 1997
 
<TABLE>
<CAPTION>
                           GUARANTOR      OTHER         GLD                  CONSOLIDATED
                          SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTALS
                          ------------ ------------ ----------- ------------ ------------
<S>                       <C>          <C>          <C>         <C>          <C>
         ASSETS
Current assets:
 Cash and equivalents...    $  1,285     $   432      $    --    $      --     $  1,717
 Accounts receivable....      37,167       3,132           --           --       40,299
 Receivables from
  affiliates............      18,716       9,713           --      (28,429)          --
 Current portion of net
  investment in direct
  financing leases......       2,938       4,121           --       (7,059)          --
 Contract revenues in
  excess of billings....      14,623         885           --           --       15,508
 Inventories............       7,016       2,179           --           --        9,195
 Settlement advance.....      11,000          --           --           --       11,000
 Prepaid expenses and
  other current assets..      13,259         178           --           --       13,437
                            --------     -------      -------    ---------     --------
 Total current assets...     106,004      20,640           --      (35,488)      91,156
Property and equipment,
 net....................     122,142      16,574           --           --      138,716
Net investment in direct
 financing leases.......       8,994      13,596           --      (22,590)          --
Investments in
 subsidiaries...........     155,015          --       78,156     (233,171)          --
Notes receivable from
 affiliates.............      26,717       1,893           --      (28,610)          --
Inventories.............       6,326          --           --           --        6,326
Investments in joint
 ventures...............       7,569          --           --           --        7,569
Other...................       1,788          --           --           --        1,788
                            --------     -------      -------    ---------     --------
                            $434,555     $52,703      $78,156    $(319,859)    $245,555
                            ========     =======      =======    =========     ========
    LIABILITIES AND
  STOCKHOLDERS' EQUITY
Current liabilities:
 Accounts payable.......    $ 26,852     $ 4,106      $    --    $      43     $ 31,001
 Payables to affiliates.      26,058       2,371           --      (28,429)          --
 Accrued expenses and
  other.................      16,249       2,144           --           --       18,393
 Current portion of
  obligations under
  capital leases........          --       7,059           --       (7,059)          --
 Current maturities of
  long-term debt........         200          --           --           --          200
                            --------     -------      -------    ---------     --------
 Total current
  liabilities...........      69,359      15,680           --      (35,445)      49,594
Long-term debt..........      57,400          --           --           --       57,400
Obligations under
 capital leases.........          --      22,590           --      (22,590)          --
Note payable to
 affiliates.............      28,610          --           --      (28,610)          --
Deferred income taxes...      45,299       3,023           --           --       48,322
Other...................      10,159          68           --           --       10,227
                            --------     -------      -------    ---------     --------
 Total liabilities......     210,827      41,361           --      (86,645)     165,543
Minority interests......       2,024          --           --         (168)       1,856
Stockholders' equity....     221,704      11,342       78,156     (233,046)      78,156
                            --------     -------      -------    ---------     --------
                            $434,555     $52,703      $78,156    $(319,859)    $245,555
                            ========     =======      =======    =========     ========
</TABLE>
 
                                      F-26
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
CONDENSED CONSOLIDATING BALANCE SHEET AT DECEMBER 31, 1996
 
<TABLE>
<CAPTION>
                           GUARANTOR      OTHER         GLD                  CONSOLIDATED
                          SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTALS
         ASSETS           ------------ ------------ ----------- ------------ ------------
<S>                       <C>          <C>          <C>         <C>          <C>
Current Assets:
 Cash and equivalents...    $    570     $ 1,317      $    --    $      --     $  1,887
 Accounts receivable....      25,720       2,337           --           --       28,057
 Receivables from
  affiliates............      19,308      12,659           --      (31,967)          --
 Current portion of net
  investment in direct
  financing leases......       2,673       3,570           --       (6,243)          --
 Contract revenues in
  excess of billings....       8,894       2,358           --           --       11,252
 Inventories............       8,307       1,603           --           --        9,910
 Prepaid expenses.......       2,875          --           --           --        2,875
 Deposit................       2,500          --           --           --        2,500
 Net assets of
  discontinued
  operations............       1,929          --           --           --        1,929
 Other current assets...       8,111         272           --           --        8,383
                            --------     -------      -------    ---------     --------
 Total current assets...      80,887      24,116           --      (38,210)      66,793
Property and equipment,
 net....................     126,467      16,499           --           --      142,966
Net investment in direct
 financing leases.......      11,932      17,717           --      (29,649)          --
Investment in
 subsidiaries...........     160,420          --       74,354     (234,774)          --
Notes receivable from
 affiliates.............      41,792       2,582           --      (44,374)          --
Inventories.............       6,875          --           --           --        6,875
Investments in joint
 ventures...............       4,807          --           --           --        4,807
Other...................         617          --           --           --          617
                            --------     -------      -------    ---------     --------
                            $433,797     $60,914      $74,354    $(347,007)    $222,058
                            ========     =======      =======    =========     ========
 LIABILITIES AND STOCK-
     HOLDERS' EQUITY
Current liabilities:
 Accounts payable.......     $16,741     $ 3,384      $    --    $     (21)    $ 20,104
 Payables to affiliates.      28,805       2,462           --      (31,267)
 Accrued expenses.......       9,456       1,545           --           --       11,001
 Billings in excess of
  contract revenues.....         326          --           --           --          326
 Current portion of
  obligations under
  capital leases........          --       6,243           --       (6,243)          --
 Current maturities of
  long-term debt........      13,322          --           --           --       13,322
                            --------     -------      -------    ---------     --------
 Total current
  liabilities...........      68,650      13,634           --      (37,531)      44,753
Long-term debt..........      39,114          --           --           --       39,114
Obligations under
 capital leases.........      41,792      29,649           --      (71,441)          --
Note payable to
 affiliate..............       2,582                                (2,582)
Deferred income taxes...      48,682       3,379           --           --       52,061
Other...................       8,505          57           --           --        8,562
                            --------     -------      -------    ---------     --------
 Total liabilities......     209,325      46,719           --     (111,554)     144,490
Minority interests......       3,321          --           --         (107)       3,214
Stockholders' equity
 Total stockholders'
  equity................     221,151      14,195       74,354     (235,346)      74,354
                            --------     -------      -------    ---------     --------
                            $433,797     $60,914      $74,354    $(347,007)    $222,058
                            ========     =======      =======    =========     ========
</TABLE>
 
                                      F-27
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
CONDENSED CONSOLIDATING STATEMENT OF INCOME FOR THE YEAR ENDED DECEMBER 31,
1997
 
<TABLE>
<CAPTION>
                          GUARANTOR      OTHER         GLD                  CONSOLIDATED
                         SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTALS
                         ------------ ------------ ----------- ------------ ------------
<S>                      <C>          <C>          <C>         <C>          <C>
Contract revenues.......  $ 216,388     $ 53,504     $   --      $(11,596)   $ 258,296
Costs of contract
 revenues...............   (198,428)     (41,551)        --       (11,596)    (228,383)
                          ---------     --------     ------      --------    ---------
  Gross profit..........     17,960       11,953         --            --       29,913
General and
 administrative
 expenses...............    (15,059)      (3,863)        --            --      (18,922)
                          ---------     --------     ------      --------    ---------
  Operating income......      2,901        8,090         --            --       10,991
Interest, net...........     (6,135)         148         --            --       (5,987)
Equity in earnings of
 subsidiaries...........                              3,802        (3,802)
Equity in earnings of
 joint ventures.........      3,132           --         --            --        3,132
                          ---------     --------     ------      --------    ---------
  Income (loss) before
   income taxes,
   minority interests
   and discontinued
   operations...........       (102)       8,238      3,802        (3,802)       8,136
Income tax expense......     (1,577)      (1,090)        --            --       (2,667)
Minority interests......     (1,667)                     --            --       (1,667)
                          ---------     --------     ------      --------    ---------
    Net income (loss)...  $  (3,346)    $  7,148     $3,802      $ (3,802)   $   3,802
                          =========     ========     ======      ========    =========
</TABLE>
 
                                      F-28
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
CONDENSED CONSOLIDATING STATEMENT OF INCOME FOR THE YEAR ENDED DECEMBER 31,
1996
 
<TABLE>
<CAPTION>
                          GUARANTOR      OTHER         GLD                  CONSOLIDATED
                         SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTALS
                         ------------ ------------ ----------- ------------ ------------
<S>                      <C>          <C>          <C>         <C>          <C>
Contract revenues.......   $202,864     $44,720      $   --      $(11,713)    $235,871
Costs of contract
 revenues...............   (182,625)    (37,805)         --       (11,713)    (208,717)
                           --------     -------      ------      --------     --------
  Gross profit..........     20,239       6,915          --            --       27,154
General and
 administrative
 expenses...............    (13,093)     (3,298)         --            --      (16,391)
                           --------     -------      ------      --------     --------
  Operating income......      7,146       3,617          --            --       10,763
Interest, net...........     (5,773)       (271)         --            --       (6,044)
Equity in earnings of
 subsidiaries...........                              2,006        (2,006)
Equity in earnings of
 joint ventures.........      1,139          --          --            --        1,139
                           --------     -------      ------      --------     --------
    Income before income
     taxes, minority
     interests and
     discontinued
     operations.........      2,512       3,346       2,006        (2,006)       5,858
Income tax expense......     (1,213)     (1,111)         --            --       (2,324)
Minority interests......       (419)                     --            --         (419)
                           --------     -------      ------      --------     --------
    Income from
     continuing
     operations.........        880       2,235       2,006        (2,006)       3,115
Discontinued operations
  Loss from operations,
   net of tax benefit of
   $695.................     (1,044)         --          --            --       (1,044)
  Loss on disposal, net
   of tax benefit of
   $44..................        (65)         --          --            --          (65)
                           --------     -------      ------      --------     --------
    Net income (loss)...   $   (229)    $ 2,235      $2,006      $ (2,006)    $  2,006
                           ========     =======      ======      ========     ========
</TABLE>
 
                                      F-29
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
CONDENSED CONSOLIDATING STATEMENT OF INCOME FOR THE YEAR ENDED DECEMBER 31,
1995
 
<TABLE>
<CAPTION>
                           GUARANTOR      OTHER         GLD                  CONSOLIDATED
                          SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTAL
                          ------------ ------------ ----------- ------------ ------------
<S>                       <C>          <C>          <C>         <C>          <C>
Contract revenues.......   $ 197,467     $ 38,193     $    --     $(8,795)    $ 226,865
Costs of contract
 revenues...............    (196,994)     (28,878)         --      (8,795)     (217,077)
                           ---------     --------     -------     -------     ---------
  Gross profit..........         473        9,315          --          --         9,788
General & administrative
 expenses...............     (13,100)      (2,770)         --          --       (15,870)
                           ---------     --------     -------     -------     ---------
  Operating income
   (loss)...............     (12,627)       6,545          --          --        (6,082)
Other income (expense):
  Interest, net.........      (7,447)        (415)         --          --        (7,862)
  Equity in earnings of
   subsidiaries.........                               (9,984)      9,984
  Equity in earnings of
   joint ventures.......       1,333           --          --          --         1,333
                           ---------     --------     -------     -------     ---------
    Income (loss) before
     income taxes,
     minority interests
     and discontinued
     operations.........     (18,741)       6,130      (9,984)      9,984       (12,611)
Income tax benefit
 (expense)..............       5,235       (1,075)         --          --         4,160
Minority interests......      (1,204)                      --          --        (1,204)
                           ---------     --------     -------     -------     ---------
    Income (loss) from
     continuing
     operations.........     (14,710)       5,055      (9,984)      9,984        (9,655)
Discontinued operations:
  Loss from operations,
   net of tax benefit of
   $163.................        (329)          --          --          --          (329)
                           ---------     --------     -------     -------     ---------
    Net income (loss)...   $ (15,039)    $  5,055     $(9,984)    $ 9,984     $  (9,984)
                           =========     ========     =======     =======     =========
</TABLE>
 
                                      F-30
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
CONDENSED CONSOLIDATING CASH FLOWS FOR THE YEAR ENDED DECEMBER 31, 1997
 
<TABLE>
<CAPTION>
                           GUARANTOR      OTHER         GLD                  CONSOLIDATED
                          SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTALS
                          ------------ ------------ ----------- ------------ ------------
<S>                       <C>          <C>          <C>         <C>          <C>
OPERATING ACTIVITIES
Net income (loss).......    $ (3,345)    $ 7,147      $3,802      $(3,802)     $  3,802
Adjustments to reconcile
 net income to net cash
 flows from operation
 activities:
 Depreciation...........       9,899       3,716          --           --        13,615
 Earnings of
  subsidiaries and joint
  ventures..............      (3,132)         --      (3,802)       3,802        (3,132)
 Minority interests.....       6,317      (4,650)         --           --         1,667
 Deferred income taxes..      (3,608)       (355)         --           --        (3,963)
 Gain on dispositions of
  property and
  equipment.............      (3,308)         --          --           --        (3,308)
 Foreign income taxes...       2,696          --          --           --         2,696
 Other, net.............        (238)         --          --           --          (238)
 Changes in net assets
  and liabilities:
  Accounts receivable...     (13,711)      1,469          --           --       (12,242)
  Contract revenues in
   excess of billings...      (5,729)      1,473          --           --        (4,256)
  Inventories...........       1,264          --          --           --         1,264
  Prepaid expenses and
   other current
   assets...............         232        (482)         --           --          (250)
  Accounts payable and
   accrued expenses.....      13,251       2,064          --           --        15,315
  Billings in excess of
   contract revenues....       2,772        (124)                                 2,648
                            --------     -------      ------      -------      --------
 Net cash flows from op-
  erating activities....       3,360      10,258          --           --        13,618
INVESTING ACTIVITIES
Purchases of property
 and equipment..........      (7,703)     (3,791)         --           --       (11,494)
Proceeds from
 dispositions of
 property and equipment.       5,437          --          --           --         5,437
Distributions from joint
 venture................       1,000          --          --           --         1,000
Investments in joint
 venture................        (630)         --          --           --          (630)
Distributions to
 minority interests.....          --      (3,025)         --           --        (3,025)
Deposit.................       2,500          --          --           --         2,500
Principal payments
 received on direct
 financing leases.......      (3,570)      3,570          --           --            --
Payments received on
 notes receivable from
 affiliate..............      (1,371)      1,371          --           --            --
                            --------     -------      ------      -------      --------
 Net cash flows from
  investing activities..      (4,337)     (1,875)         --           --        (6,212)
FINANCING ACTIVITIES
Proceeds from long-term
 debt...................     102,500          --          --           --       102,500
Repayments of long-term
 debt...................     (97,336)         --          --           --       (97,336)
Principal payments on
 capital leases.........       6,243      (6,243)         --           --            --
Financing fees..........      (1,740)         --          --           --        (1,740)
Settlement advance......     (11,000)         --          --           --       (11,000)
                            --------     -------      ------      -------      --------
 Net cash flows from
  financing activities..      (1,333)     (6,243)         --           --        (7,576)
                            --------     -------      ------      -------      --------
Net increase (decrease)
 in cash and
 equivalents............      (2,310)      2,140                                   (170)
Cash and equivalents at
 beginning of period....         570       1,317          --           --         1,887
                            --------     -------      ------      -------      --------
Cash and equivalents at
 end of period..........    $ (1,740)    $ 3,457      $   --      $    --      $  1,717
                            ========     =======      ======      =======      ========
</TABLE>
 
                                      F-31
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
CONDENSED CONSOLIDATING CASH FLOWS FOR THE YEAR ENDED DECEMBER 31, 1996
 
<TABLE>
<CAPTION>
                           GUARANTOR      OTHER         GLD                  CONSOLIDATED
                          SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTALS
                          ------------ ------------ ----------- ------------ ------------
<S>                       <C>          <C>          <C>         <C>          <C>
OPERATING ACTIVITIES
Net income (loss).......    $  (229)      $2,235      $ 2,006     $(2,006)     $ 2,006
Adjustments to reconcile
 net income to net cash
 flows from operating
 activities:
 Depreciation...........     10,191        3,690           --          --       13,881
 Earnings of
  subsidiaries and joint
  ventures..............     (1,139)          --       (2,006)      2,006       (1,139)
 Minority interests.....      3,219       (2,800)          --          --          419
 Deferred income taxes..     (3,461)        (335)          --          --       (3,796)
 Gain on dispositions of
  property and
  equipment.............       (467)          --           --          --         (467)
 Foreign income taxes...      2,382           --           --          --        2,382
 Pension curtailment and
  settlement............     (1,688)          --           --          --       (1,688)
 Other, net.............        217           --           --          --          217
 Changes in assets and
  liabilities:
  Accounts receivable...     20,956          (11)          --          --       20,945
  Contract revenues in
   excess of billings...      3,033           61           --          --        3,094
  Inventories...........      3,915           --           --          --        3,915
  Prepaid expenses and
   other current assets.       (281)        (121)          --          --         (402)
  Income tax receivable.      3,509           --           --          --        3,509
  Accounts payable and
   accrued expenses.....    (17,074)       1,193           --          --      (15,881)
  Billings in excess of
   contract revenues....     (2,445)         124           --          --       (2,321)
                            -------       ------      -------     -------      -------
 Net cash flows from
  operating activities..     20,638        4,036           --          --       24,674
INVESTING ACTIVITIES
Purchases of property
 and equipment..........     (4,023)      (1,388)          --          --       (5,411)
Dispositions of property
 and equipment..........      7,820           --           --          --        7,820
Distributions from joint
 venture................        750           --           --          --          750
Investments in joint
 venture................       (755)          --           --          --         (755)
Distribution to minority
 interests..............         --         (700)          --          --         (700)
Deposit.................     (2,500)          --           --          --       (2,500)
Principal payments
 received on direct
 financing leases.......     (3,100)       3,100           --          --           --
Payments received on
 notes receivable from
 affiliate..............     (1,371)       1,371           --          --           --
                            -------       ------      -------     -------      -------
 Net cash flows from
  investing activities..     (3,179)       2,383           --          --         (796)
FINANCING ACTIVITIES
Proceeds from long-term
 debt...................     27,051           --           --          --       27,051
Repayments of long-term
 debt...................    (51,368)          --           --          --      (51,368)
Principal payments on
 capital leases.........      5,533       (5,533)          --          --           --
                            -------       ------      -------     -------      -------
 Net cash flows from
  financing activities..    (18,784)      (5,533)          --          --      (24,317)
                            -------       ------      -------     -------      -------
Net increase (decrease)
 in cash and
 equivalents............     (1,325)         886           --          --         (439)
Cash and equivalents at
 beginning of period....      1,895          431           --          --        2,326
                            -------       ------      -------     -------      -------
Cash and equivalents at
 end of period..........    $   570       $1,317      $(2,006)     $2,006      $ 1,887
                            =======       ======      =======     =======      =======
</TABLE>
 
                                      F-32
<PAGE>
 
             GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
CONDENSED CONSOLIDATING CASH FLOWS FOR THE YEAR ENDED DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                           GUARANTOR      OTHER         GLD                  CONSOLIDATED
                          SUBSIDIARIES SUBSIDIARIES CORPORATION ELIMINATIONS    TOTALS
                          ------------ ------------ ----------- ------------ ------------
<S>                       <C>          <C>          <C>         <C>          <C>
OPERATING ACTIVITIES
Net income (loss).......    $(15,039)    $  5,055     $(9,984)    $ 9,984      $ (9,984)
Adjustments to reconcile
 net income to net cash
 flows from operating
 activities:
 Depreciation...........      11,195        3,505          --          --        14,700
 Earnings of
  subsidiaries and joint
  ventures..............      (1,333)          --       9,984      (9,984)       (1,333)
 Minority interests.....       1,204                       --          --         1,204
 Deferred income taxes..      (1,757)         405          --          --        (1,352)
 Gain on dispositions of
  property and
  equipment.............      (1,496)          --          --          --        (1,496)
 Other, net.............           6           --          --          --             6
 Changes in assets and
  liabilities:                                             --          --            --
  Accounts receivable...      10,508       (5,465)         --          --         5,043
  Contract revenues in
   excess of billings...       4,585       (1,113)         --          --         3,472
  Inventories...........      (3,714)          --          --          --        (3,714)
  Prepaid expenses and
   other current assets.       1,357          753          --          --         2,110
  Income tax receivable.      (3,509)          --          --          --        (3,509)
  Accounts payable and
   accrued expenses.....      (8,757)         257          --          --        (8,500)
  Billings in excess of
   contract revenues....        (320)         (76)                     --          (396)
                            --------     --------     -------     -------      --------
 Net cash flows from
  operating activities..      (7,070)       3,321                                (3,749)
INVESTING ACTIVITIES
 Purchases of property
  and equipment.........     (10,283)      (1,190)         --          --       (11,473)
 Dispositions of
  property and
  equipment.............       2,664           --          --          --         2,664
 Distributions from
  joint venture.........       5,500           --          --          --         5,500
 Distribution to
  minority interests....          --         (640)         --          --          (640)
 Principal payments
  received on direct
  financing leases......      (2,740)       2,740          --          --            --
 Payments received on
  notes receivable from
  affiliate.............      (1,371)       1,371          --          --            --
                            --------     --------     -------     -------      --------
 Net cash flows from
  investing activities..      (6,230)       2,281          --          --        (3,949)
FINANCING ACTIVITIES
 Proceeds from long-term
  debt..................      52,700           --          --          --        52,700
 Repayments of long-term
  debt..................     (46,220)          --          --          --       (46,220)
 Principal payments on
  capital leases........       4,953       (4,953)         --          --            --
 Dividends paid.........       3,440       (3,440)         --          --            --
                            --------     --------     -------     -------      --------
 Net cash flows from
  financing activities..      14,873       (8,393)         --          --         6,480
                            --------     --------     -------     -------      --------
Net increase (decrease)
 in cash and
 equivalents............       1,573      (2,791)          --          --        (1,218)
Cash and equivalents at
 beginning of period....         322        3,222          --          --         3,544
                            --------     --------     -------     -------      --------
Cash and equivalents at
 end of period..........    $  1,895     $    431     $ 9,984     $(9,984)     $  2,326
                            ========     ========     =======     =======      ========
</TABLE>
 
                                      F-33
<PAGE>
 
                   REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To the Partners
 Amboy Aggregates
 
  We have audited the accompanying balance sheets of AMBOY AGGREGATES (A JOINT
VENTURE) as of December 31, 1997 and 1996, and the related statements of
income and partners' capital and cash flows for each of the three years in the
period ended December 31, 1997. These financial statements are the
responsibility of the Partnership's management. Our responsibility is to
express an opinion on these financial statements based on our audits.
 
  We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.
 
  In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Amboy Aggregates (A Joint
Venture) as of December 31, 1997 and 1996, and its results of operations and
cash flows for each of the three years in the period ended December 31, 1997,
in conformity with generally accepted accounting principles.
 
J.H. COHN LLP
 
Roseland, New Jersey
January 23, 1998
 
                                     F-34
<PAGE>
 
                       AMBOY AGGREGATES (A JOINT VENTURE)
                                 BALANCE SHEETS
                           DECEMBER 31, 1997 AND 1996
 
<TABLE>
<CAPTION>
                                                           1997        1996
                                                        ----------- -----------
<S>                                                     <C>         <C>
                        ASSETS
Current assets:
  Cash and cash equivalents............................ $ 1,830,997 $   914,810
  Accounts receivable, net of allowance for doubtful
   accounts of $100,147 and $192,401...................   6,319,106   3,749,758
  Inventory............................................   1,142,696   1,633,236
  Prepaid expenses and other current assets............     167,108     273,164
  Due from general partners............................     136,969
                                                        ----------- -----------
    Total current assets...............................   9,596,876   6,570,968
  Property, plant and equipment, net of accumulated
   depreciation........................................  13,756,075  15,454,986
  Deferred charges.....................................      59,995      70,280
  Permits..............................................   1,408,653   1,388,031
                                                        ----------- -----------
    Totals............................................. $24,821,599 $23,484,265
                                                        =========== ===========
           LIABILITIES AND PARTNERS' CAPITAL
Current liabilities:
  Current portion of long-term debt.................... $ 1,714,113 $ 1,635,024
  Accounts payable.....................................     849,877     665,985
  Accrued expenses and other current liabilities.......     552,943     319,451
  Due general partners.................................                 545,469
                                                        ----------- -----------
    Total current liabilities..........................   3,116,933   3,165,929
Long-term debt, noncurrent portion.....................   9,985,353  11,666,812
Deferred compensation..................................     751,431     548,138
                                                        ----------- -----------
    Total liabilities..................................  13,853,717  15,380,879
Commitments and contingency
Partners' capital......................................  10,967,882   8,103,386
                                                        ----------- -----------
    Totals............................................. $24,821,599 $23,484,265
                                                        =========== ===========
</TABLE>
 
 
                       See Notes to Financial Statements.
 
                                      F-35
<PAGE>
 
                       AMBOY AGGREGATES (A JOINT VENTURE)
                   STATEMENTS OF INCOME AND PARTNERS' CAPITAL
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                            1997         1996          1995
                                         -----------  -----------  ------------
<S>                                      <C>          <C>          <C>
                 INCOME
Revenue:
  Net sales............................. $21,418,691  $17,507,797  $ 15,707,172
  Royalties.............................     799,356                     67,702
  Interest..............................      46,879       26,144        50,417
                                         -----------  -----------  ------------
    Totals..............................  22,264,926   17,533,941    15,825,291
                                         -----------  -----------  ------------
Costs and expenses:
  Cost of sales.........................  14,442,219   12,457,297    10,891,600
  Selling...............................     231,474      329,290       307,957
  General and administrative............   1,746,253    1,363,867     1,298,124
  Interest..............................     980,484    1,105,298       662,244
                                         -----------  -----------  ------------
    Totals..............................  17,400,430   15,255,752    13,159,925
                                         -----------  -----------  ------------
Net income..............................   4,864,496    2,278,189     2,665,366
           PARTNERS' CAPITAL
Balance, beginning of year..............   8,103,386    7,325,197    15,659,831
Distributions...........................  (2,000,000)  (1,500,000)  (11,000,000)
                                         -----------  -----------  ------------
Balance, end of year.................... $10,967,882  $ 8,103,386  $  7,325,197
                                         ===========  ===========  ============
</TABLE>
 
 
                       See Notes to Financial Statements.
 
                                      F-36
<PAGE>
 
                       AMBOY AGGREGATES (A JOINT VENTURE)
                            STATEMENTS OF CASH FLOWS
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                           1997         1996          1995
                                        -----------  -----------  ------------
<S>                                     <C>          <C>          <C>
OPERATING ACTIVITIES:
Net income............................  $ 4,864,496  $ 2,278,189  $  2,665,366
Adjustments to reconcile net income to
 net cash provided by operating
 activities:
  Depreciation and amortization.......    2,265,295    2,119,526     2,105,152
  Provision for doubtful accounts.....      120,000      120,000        60,000
  Changes in operating assets and
   liabilities:
    Accounts receivable...............   (2,689,348)  (1,600,753)      698,451
    Inventory.........................      490,540     (356,058)     (533,780)
    Prepaid expenses and other current
     assets...........................      106,056      130,079       (89,042)
    Accounts payable..................      183,892      342,685      (427,156)
    Accrued expenses and other
     liabilities......................      436,785       (6,328)     (926,809)
    Due general partners..............     (682,438)     545,469
                                        -----------  -----------  ------------
  Net cash provided by operating
   activities.........................    5,095,278    3,572,809     3,552,182
                                        -----------  -----------  ------------
INVESTING ACTIVITIES:
Capital expenditures..................     (556,099)    (480,915)   (1,568,823)
Increase in other assets..............      (20,622)     (66,097)      (99,757)
                                        -----------  -----------  ------------
  Net cash used in investing
   activities.........................     (576,721)    (547,012)   (1,668,580)
                                        -----------  -----------  ------------
FINANCING ACTIVITIES:
Deferred charges......................                                 (19,721)
Proceeds of long-term debt............                               9,628,944
Payments of long-term debt............   (1,602,370)  (1,500,818)   (1,496,335)
Distributions.........................   (2,000,000)  (1,500,000)  (12,800,000)
                                        -----------  -----------  ------------
  Net cash used in financing activi-
   ties...............................   (3,602,370)  (3,000,818)   (4,687,112)
                                        -----------  -----------  ------------
Net increase (decrease) in cash and
 cash equivalents.....................      916,187       24,979    (2,803,510)
Cash and cash equivalents, beginning
 of year..............................      914,810      889,831     3,693,341
                                        -----------  -----------  ------------
Cash and cash equivalents, end of
 year.................................  $ 1,830,997  $   914,810  $    889,831
                                        ===========  ===========  ============
SUPPLEMENTAL DISCLOSURE OF CASH FLOW
 DATA:
Interest paid.........................  $   980,484  $ 1,105,298  $    662,244
                                        ===========  ===========  ============
</TABLE>
 
                       See Notes to Financial Statements.
 
                                      F-37
<PAGE>
 
                      AMBOY AGGREGATES (A JOINT VENTURE)
                         NOTES TO FINANCIAL STATEMENTS
 
NOTE 1--ORGANIZATION AND BUSINESS:
 
  Amboy Aggregates (the "Partnership") was established on January 1, 1989 as
an equal joint venture between Great Lakes Dredge and Dock Company and Ralph
Clayton and Sons Materials, L.P.
 
  The Partnership's principal business activity is to dredge, process,
transport and sell fine aggregate in the New York Metropolitan area.
 
NOTE 2--SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:
 
 USE OF ESTIMATES:
 
  The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect certain reported amounts and disclosures. Accordingly,
actual results could differ from those estimates.
 
 CASH EQUIVALENTS:
 
  The Partnership considers all highly liquid debt instruments purchased with
a maturity of three months or less to be cash equivalents.
 
 CONCENTRATIONS OF CREDIT RISK:
 
  Financial instruments which potentially subject the Partnership to
concentrations of credit risk consist primarily of cash and cash equivalents
and accounts receivable. The Partnership places its cash and cash equivalents
with high credit quality financial institutions. At times, such amounts exceed
Federally insured limits.
 
  The Partnership generally extends credit to its customers, a significant
portion of which are in the construction industry. During 1997, 1996 and 1995,
approximately 50%, 47% and 64%, respectively, of the Partnership's net sales
were derived from major customers who accounted for approximately $4,441,000
and $1,762,000 of the accounts receivable balance at December 31, 1997 and
1996, respectively.
 
  However, the Partnership closely monitors the extension of credit to its
customers while maintaining allowances for potential credit losses. Management
does not believe that significant credit risk exists at December 31, 1997.
 
  The Partnership is currently negotiating a joint venture agreement with a
certain customer in which both parties will own a 50% interest in a newly-
formed limited liability company. It is currently anticipated that the Company
will contribute approximately $1,500,000 of its accounts receivable from this
customer to the newly-formed entity as a capital contribution, and the
customer will contribute equipment and other assets of approximate equal
value.
 
 INVENTORY:
 
  Inventory is stated at the lower of cost, determined using the first-in,
first-out (FIFO) method, or market.
 
 PROPERTY, PLANT AND EQUIPMENT:
 
  Property, plant and equipment are stated at cost, less accumulated
depreciation. Depreciation is computed using the straight-line method over the
estimated useful lives of the respective assets.
 
                                     F-38
<PAGE>
 
                      AMBOY AGGREGATES (A JOINT VENTURE)
                  NOTES TO FINANCIAL STATEMENTS--(CONTINUED)
 
 
 DEFERRED CHARGES:
 
  Costs incurred in connection with obtaining financing are amortized and
charged to interest expense over the term of the related loan using the
straight-line method which approximates the interest method.
 
 OTHER ASSETS:
 
  Costs incurred in connection with obtaining permits to dredge the
Partnership's products are amortized on the straight-line basis over the term
of the related permits.
 
 ADVERTISING:
 
  The Company expenses the cost of advertising and promotion as incurred.
Advertising costs charged to operations were not material during 1997, 1996
and 1995.
 
 INCOME TAXES:
 
  Income or loss of the Partnership is includible in the income tax returns of
the partners in proportion to their respective interests. Accordingly, there
is no provision for income taxes in the accompanying financial statements.
 
 RECENT ACCOUNTING PRONOUNCEMENTS:
 
  In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130, "Reporting Comprehensive Income"
("SFAS 130"), and Statement of Financial Accounting Standards No. 131,
"Disclosures about Segments of an Enterprise and Related Information" ("SFAS
131"), which could require the Company to make additional disclosures in its
financial statements no later than for the year ending December 31, 1998. SFAS
130 defines comprehensive income, which includes items in addition to those
reported in the statement of operations, and requires disclosures about its
components. Management believes that the adoption of SFAS 130 will not require
the Company to make any additional disclosures. SFAS 131 requires disclosures
for each segment of a business and the determination of segments based on its
internal management structure. Management is in the process of evaluating
whether SFAS 131 will require the Company to make any additional disclosures.
 
NOTE 3--INVENTORY:
 
  Inventory consists of the following:
 
<TABLE>
<CAPTION>
                                                              1997       1996
                                                           ---------- ----------
     <S>                                                   <C>        <C>
     Raw materials........................................ $  654,845 $  775,292
     Finished goods.......................................    442,024    810,958
     Supplies.............................................     45,827     46,986
                                                           ---------- ----------
       Totals............................................. $1,142,696 $1,633,236
                                                           ========== ==========
</TABLE>
 
                                     F-39
<PAGE>
 
                      AMBOY AGGREGATES (A JOINT VENTURE)
                  NOTES TO FINANCIAL STATEMENTS--(CONTINUED)
 
 
NOTE 4--PROPERTY, PLANT AND EQUIPMENT:
 
  Property, plant and equipment consists of the following:
 
<TABLE>
<CAPTION>
                                             RANGE OF
                                            ESTIMATED
                                           USEFUL LIVES
                                             (YEARS)       1997        1996
                                           ------------ ----------- -----------
     <S>                                   <C>          <C>         <C>
     Land.................................              $   677,408 $   677,408
     Plant and equipment..................    3 to 15     6,616,018   6,245,360
     Delivery equipment (Scows)...........   10 to 20     7,781,647   7,697,412
     Dredging system......................   15 to 20    13,828,348  13,796,684
     Office equipment and trailers........      10          222,170     214,294
     Automobiles and trucks...............    3 to 5        141,098     113,755
                                                        ----------- -----------
                                                         29,266,689  28,744,913
     Less accumulated depreciation........               15,510,614  13,289,927
                                                        ----------- -----------
       Totals.............................              $13,756,075 $15,454,986
                                                        =========== ===========
</TABLE>
 
  Depreciation expense for the years ended December 31, 1997, 1996 and 1995
was $2,255,010, $2,109,241 and $1,961,074, respectively.
 
NOTE 5--ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES:
 
  Accrued expenses and other current liabilities consist of the following:
 
<TABLE>
<CAPTION>
                                                                 1997     1996
                                                               -------- --------
     <S>                                                       <C>      <C>
     Compensation............................................. $510,339 $165,452
     Union health and welfare.................................   41,808   38,987
     Insurance................................................            71,903
     Sundry...................................................      796   43,109
                                                               -------- --------
       Totals................................................. $552,943 $319,451
                                                               ======== ========
</TABLE>
 
NOTE 6--LONG-TERM DEBT:
 
  At December 31, 1997 and 1996, long-term debt consists of borrowings under a
$15,000,000 variable rate term loan agreement which is payable in monthly
installments through October 2003 with interest at the lower of either the
bank's base rate minus 1/2% or the 30/90 day LIBOR rate plus 180 basis points.
 
  The loan, which is secured by all of the Partnership's machinery and
equipment with a net book value of approximately $13,100,000 at December 31,
1997, also includes a negative pledge of the Partnership's real estate
prohibiting its use as collateral for any other debt. In addition, the loan is
guaranteed by the individual shareholders and/or partners of the general
partners of the Partnership. The loan agreement also contains various
covenants, including requirements for maintaining certain financial ratios and
places restrictions on capital expenditures and the amount of partners'
distributions.
 
  Principal payment requirements in each of the five years subsequent to
December 31, 1997 are as follows:
 
<TABLE>
<CAPTION>
     YEAR ENDING
     DECEMBER 31,                                                       AMOUNT
     ------------                                                     ----------
     <S>                                                              <C>
      1998........................................................... $1,714,113
      1999...........................................................  1,850,974
      2000...........................................................  1,998,762
      2001...........................................................  2,158,350
      2002...........................................................  2,330,681
</TABLE>
 
 
                                     F-40
<PAGE>
 
                      AMBOY AGGREGATES (A JOINT VENTURE)
                  NOTES TO FINANCIAL STATEMENTS--(CONTINUED)
 
  The Partnership also has available a $2,000,000 revolving credit facility,
borrowings under which are secured by the Partnership's accounts receivable
and inventory and bear interest at either the bank's base rate on the 60/90
day LIBOR rate plus 140 basis points. There is a stand-by fee of 1/2% per year
on the unused portion of the revolving credit facility. The Partnership had no
amounts outstanding under the revolving credit facility at December 31, 1997
and 1996.
 
NOTE 7--RETIREMENT PLANS:
 
 PENSION PLAN:
 
  Employees covered by a union agreement are included in a multi-employer
pension plan to which the Partnership makes contributions in accordance with
the contractual union agreement. The Partnership made contributions of
$223,792, $191,170 and $183,767 during the years ended December 31, 1997, 1996
and 1995, respectively. Plan benefit and net asset data for the multi-employer
pension plan for union employees are not available.
 
 401(K) PLAN:
 
  The Partnership maintains a retirement plan qualifying under Section 401(k)
of the Internal Revenue Code which allows eligible employees to defer a
portion of their income through contributions to the plan. Under the
provisions of the plan, the Partnership makes contributions for the benefit of
the employees, subject to certain limitations. The Partnership's contributions
for the years ended December 31, 1997, 1996 and 1995 were $44,361, $20,015 and
$18,015, respectively.
 
NOTE 8--COMMITMENTS AND CONTINGENCY:
 
 LICENSE AGREEMENT:
 
  The Partnership has a license agreement with the State of New Jersey which
enables the Partnership to dredge in the Ambrose Channel for commercial fill.
Under this agreement, the State of New Jersey receives a royalty fee based on
the amount of material dredged of $.35 ($.40 beginning August 1, 1997) per
cubic yard. Royalties charged to operations during the years ended December
31, 1997, 1996 and 1995 amounted to $799,697, $667,780 and $695,233,
respectively.
 
 LITIGATION:
 
  In the ordinary course of business, the Partnership is a defendant in
various legal proceedings. In the opinion of management, resolution of these
claims is not expected to have a material adverse impact on the financial
position or results of operations of the Partnership.
 
NOTE 9--RELATED PARTY TRANSACTIONS:
 
  During 1997, one of the general partners dredged fill material from the
Ambrose Channel under the Partnership's license agreement with the State of
New Jersey. As a result, the general partner reimbursed the Partnership for
the royalty fee of $774,326 which was paid to the State of New Jersey and, in
addition, paid the Partnership a royalty fee of $774,326.
 
  The Partnership had a towage agreement, which expired in 1996, with a
general partner whereby the Partnership was required to pay the general
partner $2.35 in 1996 and $2.20 in 1995 per delivered cubic yard for towing
service. During 1996 and 1995, the Partnership incurred towage expenses of
approximately $190,000 and $1,248,000, respectively.
 
                                     F-41
<PAGE>
 
                       AMBOY AGGREGATES (A JOINT VENTURE)
                   NOTES TO FINANCIAL STATEMENTS--(CONTINUED)
 
 
  In addition, during 1996 and 1995, Partnership purchased approximately
$545,000 and $160,000, respectively, of dredging services from a general
partner.
 
  The amounts due from/to general partners at December 31, 1997 and 1996 arose
from the aforementioned transactions.
 
NOTE 10--FAIR VALUE OF FINANCIAL INSTRUMENTS:
 
  The Company's material financial instruments at December 31, 1997 and 1996
for which disclosure of estimated fair value is required by certain accounting
standards consisted of cash and cash equivalents, accounts receivable, accounts
payable and long-term debt. In the opinion of management, (i) cash and cash
equivalents, accounts receivable and accounts payable were carried at values
that approximated their fair values because of their liquidity and/or their
short-term maturities and (ii) long-term debt was carried at values that
approximated its face value because it bears interest at rates equivalent to
those currently prevailing for financial instruments with similar
characteristics.
 
                                    *  *  *
 
                                      F-42
<PAGE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
NO DEALER, SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFOR-
MATION OR TO MAKE ANY REPRESENTATION OTHER THAN THOSE CONTAINED IN THIS OFFER-
ING MEMORANDUM, AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATION MUST
NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE ISSUER OR THE INITIAL PUR-
CHASER. THIS OFFERING MEMORANDUM DOES NOT CONSTITUTE AN OFFER TO SELL OR A SO-
LICITATION OF AN OFFER TO BUY THE NOTES BY ANYONE IN ANY JURISDICTION IN WHICH
THE PERSON MAKING THE OFFER OR SOLICITATION IS NOT QUALIFIED TO DO SO OR TO
ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR SOLICITATION. NEITHER
THE DELIVERY OF THIS OFFERING MEMORANDUM NOR ANY SALE MADE HEREUNDER SHALL
CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE AFFAIRS OF THE IS-
SUER SINCE THE DATE HEREOF OR THAT THE INFORMATION CONTAINED HEREIN IS CORRECT
AS OF ANY TIME SUBSEQUENT TO THE DATE HEREOF.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                            PAGE
<S>                                                                         <C>
Available Information.....................................................    i
Summary...................................................................    1
Risk Factors..............................................................   10
The Transaction...........................................................   18
Use of Proceeds...........................................................   18
Capitalization............................................................   19
Unaudited Pro Forma Condensed Consolidated Financial Statements...........   20
Selected Financial and Other Data.........................................   27
Management's Discussion and Analysis of Financial Condition and Results of
 Operations ..............................................................   29
The Exchange Offer........................................................   39
Business..................................................................   46
Management................................................................   58
Ownership of Capital Stock................................................   61
Description of Capital Stock..............................................   61
Description of the New Credit Facility....................................   64
Description of New Bonding Agreement......................................   66
Description of Notes......................................................   67
Certain Federal Income Tax Consequences...................................   98
Plan of Distribution......................................................   99
Legal Matters.............................................................  100
Experts...................................................................  100
Index to Consolidated Financial Statements................................  F-1
</TABLE>
 
Until           , 1999 (90 days after the date of this Prospectus), all
dealers effecting transactions in the Notes, whether or not participating in
this distribution, may be required to deliver a Prospectus. This is in
addition to the obligation of dealers to deliver a Prospectus when acting as
underwriters and with respect to their unsold allotments or subscriptions.
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                                 $115,000,000
 
                                     LOGO
[GREAT LAKES DREDGE AND DOCK CORPORATION]
 
                              GREAT LAKES DREDGE
                              & DOCK CORPORATION
 
 
              SERIES B 11 1/4% SENIOR SUBORDINATED NOTES DUE 2008
 
                       ---------------------------------
 
                                  PROSPECTUS
 
                       ---------------------------------
 
 
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                                    PART II
 
                    INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 20. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
  As permitted by the Delaware General Corporation Law ("DGCL"), the Company's
Restated Certificate of Incorporation provides that directors of the Company
shall not be personally liable to the Company or its stockholders for monetary
damages for breach of fiduciary duty as a director, except for liability (i)
for any breach of the director's duty of loyalty to the Company or its
stockholders, (ii) for acts of omissions not in good faith or which involve
intentional misconduct or a knowing violation of law, (iii) under Section 174
of the Delaware General Corporation Law, relating to prohibited dividends or
distributions or the repurchase or redemption of stock, or (iv) for any
transaction from which the director derives an improper personal benefit. In
addition, the Company's Bylaws provide for indemnification of the Company's
officers and directors to the fullest extent permitted under Delaware law.
Section 145 of the DGCL provides that a corporation may indemnify any persons,
including officers and directors, who were or are, or are threatened to be
made, parties to any threatened, pending or completed legal action, suit or
proceeding, whether civil, criminal, administrative or investigative (other
than an action by or in the right of such corporation), by reason of the fact
that such person was an officer, director, employee or agent of such
corporation or is or was serving at the request of such corporation as an
officer, director, employee or agent of another corporation, partnership,
joint venture, trust or other enterprise. The indemnity may include expenses
(including attorneys' fees), judgments, fines and amounts paid in settlement
actually and reasonably incurred by such person in connection with such
action, suit or proceeding, provided such person acted in good faith and in a
manner he reasonably believed to be in or not opposed to the corporation's
best interests and, for criminal proceedings, had no reasonable cause to
believe that his conduct was unlawful. A Delaware corporation may indemnify
officers and directors in an action by or in the right of the corporation
under the same conditions, except that no indemnification is permitted without
judicial approval if the officer or director is adjudged to be liable to the
corporation. Where an officer or director is successful on the merits or
otherwise in the defense of any action referred to above, the corporation must
indemnify him against the expenses that such officer or director actually and
reasonably incurred. Insofar as indemnification for liabilities arising under
the Securities Act may be permitted to directors, officers or persons
controlling the Company pursuant to the foregoing provisions, the Company has
been informed that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Securities
Act and is therefore unenforceable.
 
  The directors and officers of the Company are insured against certain
liabilities under the registrant's directors' and officers' liability
insurance.
 
ITEM 21.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.
 
  (a) Exhibits
 
  The following exhibits are filed herewith unless otherwise indicated:
 
<TABLE>
<CAPTION>
 EXHIBIT
 NUMBER  DESCRIPTION
 ------- -----------
 <C>     <S>
 2.01    Plan and Agreement of Merger dated as of August 19, 1998 between the
         Company and Great Lakes Dredge & Dock Acquisition, Inc.
 3.01    Restated Certificate of Incorporation of the Company.
 3.02    Bylaws of the Company.
 4.01    Indenture dated as of August 19, 1998 among the Company, the
         Subsidiary Guarantors and The Bank of New York, as Trustee.
 4.02    Registration Rights Agreement dated as of August 19, 1998 among the
         Company, the Subsidiary Guarantors and the Initial Purchaser.
         Form of 11% Senior Subordinated Note due 2008 (included in Exhibit
 4.03    4.01).
 5.01*   Opinion of Dechert Price & Rhoads.
</TABLE>
 
                                     II-1
<PAGE>
 
<TABLE>
<CAPTION>
 EXHIBIT
 NUMBER  DESCRIPTION
 ------- -----------
 <C>     <S>
 10.01   Credit Agreement dated as of August 19, 1998 among the Company and the
         other loan parties thereto, as Borrowers, the financial institutions
         from time to time party thereto, as Lenders, Bank of Montreal, Chicago
         Branch, as Documentation Agent, Bank of America National Trust and
         Savings Association, as Issuing Lender and Administrative Agent and
         BancAmerica Robertson Stephens, as Lead Arranger.
 10.02   Second Amended and Restated Underwriting and Continuing Indemnity
         Agreement dated August 19, 1998 among the Company, certain of its
         Subsidiaries, Reliance Insurance Company, United Pacific Insurance
         Company, Reliance National Insurance Company and Reliance Surety
         Company.
 10.03   Contract relating to Boston Harbor Navigation Improvement and Berth
         Dredging Project between Great Lakes Dredge & Dock Company and United
         States Army Corps of Engineers, awarded May 18, 1998.
 10.04   Contract Relating to Stage 2, Port of Los Angeles, Pier 400 Deep
         Draft, Navigation Improvements, Los Angeles and Long Beach Harbors,
         San Pedro Bay, Los Angeles County, California, between Pier 400
         Constructors and United States Army Corps of Engineers, awarded May
         12, 1997.
 10.05   Employment Agreement between the Company and Douglas B. Mackie.
 10.06*  Great Lakes Dredge & Dock 401(k) Plan
 21.01   Subsidiaries of the Registrant.
 23.01   Consent of Deloitte & Touche LLP (included on Page II-10).
 23.02   Consent of J.H. Cohn LLP (included on Page II-11).
 23.03*  Consent of Dechert Price & Rhoads (included in Exhibit 5.01).
 24.01   Powers of Attorney (included on Signature Pages).
         Statement of Eligibility and Qualification of The Bank of New York on
 25.01   Form T-1.
 27.01   Financial Data Schedule for the Company.
 99.01*  Form of Letter of Transmittal.
 99.02*  Form of Notice of Guaranteed Delivery.
</TABLE>
- --------
*  To be filed by amendment.
 
  (b) Financial Statement Schedules:
 
  Schedules not listed above are omitted because of the absence of the
conditions under which they are required or because the information required
by such omitted schedules is set forth in the financial statements or the
notes thereto.
 
ITEM 22. UNDERTAKINGS.
 
  (a) The undersigned registrants hereby undertake:
 
  (1) to file, during any period in which offers or sales are being made, a
      post-effective amendment to this registration statement:
 
    (i) to include any prospectus required by Section 10(a)(3) of the
        Securities Act of 1933;
 
    (ii) to reflect in the prospectus any facts or events arising after the
         effective date of the registration statement (or the most recent
         post- effective amendment thereof) which, individually or in the
         aggregate, represent a fundamental change in the information set
         forth in the registration statement. Notwithstanding the
         foregoing, any increase or decrease in volume of securities
         offered (if the total dollar value of securities offered would not
         exceed that which was registered) and any deviation from the low
         or high end of the estimated maximum offering range may be
         reflected in the form of prospectus filed with the Commission
         pursuant to Rule 424(b) if, in the aggregate, the changes in
         volume and price represent no more than a 20% change in the
         maximum aggregate offering price set forth in the "Calculation of
         Registration Fee" table in the effective registration statement;
         and
 
    (iii) to include any material information with respect to the plan of
          distribution not previously disclosed in the registration
          statement or any material change to such information in the
          registration statement;
 
                                     II-2
<PAGE>
 
  (2) that, for the purpose of determining any liability under the Securities
      Act of 1933, each such post-effective amendment shall be deemed to be a
      new registration statement relating to the securities offered therein,
      and the offering of such securities at that time shall be deemed to be
      the initial bona fide offering thereof; and
 
  (3) to remove from registration by means of a post-effective amendment any
      of the securities being registered which remain unsold at the
      termination of the offering.
 
  (b) Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the registrants pursuant to the foregoing provisions, or otherwise, the
registrants have been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as expressed
in the Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrants in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrants will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the Act
and will be governed by the final adjudication of such issue.
 
  (c) The undersigned registrants hereby undertake to respond to requests for
information that is incorporated by reference into the prospectus pursuant to
Items 4, 10(b), 11 or 13 of this Form, within one business day of receipt of
such request, and to send the incorporated documents by first class mail or
other equally prompt means. This includes information contained in documents
filed subsequent to the effective date of the registration statement through
the date of responding to the request.
 
  (d) The undersigned registrants hereby undertake to supply by means of a
post- effective amendment all information concerning a transaction, and the
company being acquired involved therein, that was not the subject of and
included in the registration statement when it became effective.
 
                                     II-3
<PAGE>
 
                                  SIGNATURES
 
  Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Oak Brook and State of
Illinois on September 29, 1998.
 
                                     GREAT LAKES DREDGE & DOCK CORPORATION
 
                                         /s/ Douglas B. Mackie
                                     By: ______________________________________
                                        Douglas B. Mackie
                                        President & Chief Executive Officer
 
                               POWER OF ATTORNEY
 
  KNOWN TO ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Douglas B. Mackie and Bruce J. Biemeck,
each and individually, his or her attorneys-in-fact, with full power of
substitution and resubstitution, for him or her in any and all capacities, to
sign any or all amendments or post-effective amendments to this Registration
Statement or any Registration Statement for the same offering that is
effective upon filing pursuant to Rule 462(b) under the Securities Act of
1933, as amended, with the Securities and Exchange Commission, granting unto
each of such attorneys-in-fact and agents full power and authority to do and
perform each and every act and thing requisite and necessary in connection
with such matters and hereby ratifying and confirming all that each such
attorney-in-fact, or his agent or substitutes, may do or cause to be done by
virtue hereof.
 
  Pursuant to the requirements of the Securities Act of 1933, as amended, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
 
                NAME                           TITLE                 DATE
 
        /s/ Douglas B. Mackie          President, Chief      September 29, 1998
- -------------------------------------  Executive Officer             
          Douglas B. Mackie            and Director
                                       (principal executive
                                       officer)
 
        /s/ Bruce J. Biemeck           Senior Vice           September 29, 1998
- -------------------------------------  President, Chief             
          Bruce J. Biemeck             Financial Officer
                                       and Treasurer
                                       (principal financial
                                       officer and
                                       principal accounting
                                       officer)
 
       /s/ Michael A. Delaney          Director              September 29, 1998
- -------------------------------------                                
         Michael A. Delaney
 
       /s/ David Wagstaff III          Director              September 29, 1998
- -------------------------------------                                
         David Wagstaff III
 
                                     II-4
<PAGE>
 
                                  SIGNATURES
 
  Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Oak Brook and State of
Illinois on September 29, 1998.
 
                                          GREAT LAKES DREDGE & DOCK COMPANY
 
                                            /s/ Douglas B. Mackie
                                          By:__________________________________
                                            Douglas B. Mackie
                                            President & Chief Executive
                                            Officer
 
                               POWER OF ATTORNEY
 
  KNOWN TO ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Douglas B. Mackie and Bruce J. Biemeck,
each and individually, his or her attorneys-in-fact, with full power of
substitution and resubstitution, for him or her in any and all capacities, to
sign any or all amendments or post-effective amendments to this Registration
Statement or any Registration Statement for the same offering that is
effective upon filing pursuant to Rule 462(b) under the Securities Act of
1933, as amended, with the Securities and Exchange Commission, granting unto
each of such attorneys-in-fact and agents full power and authority to do and
perform each and every act and thing requisite and necessary in connection
with such matters and hereby ratifying and confirming all that each such
attorney-in-fact, or his agent or substitutes, may do or cause to be done by
virtue hereof.
 
  Pursuant to the requirements of the Securities Act of 1933, as amended, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
 
                NAME                           TITLE                 DATE
 
        /s/ Douglas B. Mackie          President, Chief       September 29, 1998
- -------------------------------------  Executive Officer             
          Douglas B. Mackie            and Director
                                       (principal executive
                                       officer)
 
        /s/ Bruce J. Biemeck           Senior Vice            September 29, 1998
- -------------------------------------  President, Chief              
          Bruce J. Biemeck             Financial Officer
                                       and Treasurer
                                       (principal financial
                                       officer and
                                       principal accounting
                                       officer) and
                                       Director
 
           /s/ Mark Thomas             Director               September 29, 1998
- -------------------------------------                                
             Mark Thomas
 
                                     II-5
<PAGE>
 
                                  SIGNATURES
 
  Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Oak Brook and State of
Illinois on September 29, 1998.
 
                                          GREAT LAKES INTERNATIONAL, INC.
 
                                            /s/ Douglas B. Mackie
                                          By: _________________________________
                                            Douglas B. Mackie
                                            President & Chief Executive
                                            Officer
 
                               POWER OF ATTORNEY
 
  KNOWN TO ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Douglas B. Mackie and Bruce J. Biemeck,
each and individually, his or her attorneys-in-fact, with full power of
substitution and resubstitution, for him or her in any and all capacities, to
sign any or all amendments or post-effective amendments to this Registration
Statement or any Registration Statement for the same offering that is
effective upon filing pursuant to Rule 462(b) under the Securities Act of
1933, as amended, with the Securities and Exchange Commission, granting unto
each of such attorneys-in-fact and agents full power and authority to do and
perform each and every act and thing requisite and necessary in connection
with such matters and hereby ratifying and confirming all that each such
attorney-in-fact, or his agent or substitutes, may do or cause to be done by
virtue hereof.
 
  Pursuant to the requirements of the Securities Act of 1933, as amended, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
 
                NAME                           TITLE                 DATE
 
        /s/ Douglas B. Mackie          President, Chief       September 29, 1998
- -------------------------------------  Executive Officer            
          Douglas B. Mackie            and Director
                                       (principal executive
                                       officer)
 
        /s/ Bruce J. Biemeck           Senior Vice            September 29, 1998
- -------------------------------------  President, Chief              
          Bruce J. Biemeck             Financial Officer
                                       and Treasurer
                                       (principal financial
                                       officer and
                                       principal accounting
                                       officer) and
                                       Director
 
           /s/ Mark Thomas             Director               September 29, 1998
- -------------------------------------                                
             Mark Thomas
 
                                     II-6
<PAGE>
 
                                  SIGNATURES
 
  Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Oak Brook and State of
Illinois on September 29, 1998.
 
                                          DAWSON DREDGING COMPANY
 
                                            /s/ Douglas B. Mackie
                                          By: _________________________________
                                            Douglas B. Mackie
                                            President & Chief Executive
                                            Officer
 
                               POWER OF ATTORNEY
 
  KNOWN TO ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Douglas B. Mackie and Bruce J. Biemeck,
each and individually, his or her attorneys-in-fact, with full power of
substitution and resubstitution, for him or her in any and all capacities, to
sign any or all amendments or post-effective amendments to this Registration
Statement or any Registration Statement for the same offering that is
effective upon filing pursuant to Rule 462(b) under the Securities Act of
1933, as amended, with the Securities and Exchange Commission, granting unto
each of such attorneys-in-fact and agents full power and authority to do and
perform each and every act and thing requisite and necessary in connection
with such matters and hereby ratifying and confirming all that each such
attorney-in-fact, or his agent or substitutes, may do or cause to be done by
virtue hereof.
 
  Pursuant to the requirements of the Securities Act of 1933, as amended, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
 
                NAME                           TITLE                 DATE
 
        /s/ Douglas B. Mackie          President, Chief       September 29, 1998
- -------------------------------------  Executive Officer            
          Douglas B. Mackie            and Director
                                       (principal executive
                                       officer)
 
        /s/ Bruce J. Biemeck           Senior Vice            September 29, 1998
- -------------------------------------  President, Chief             
          Bruce J. Biemeck             Financial Officer
                                       and Treasurer
                                       (principal financial
                                       officer and
                                       principal accounting
                                       officer) and
                                       Director
 
           /s/ Mark Thomas             Director               September 29, 1998
- -------------------------------------                                
             Mark Thomas
 
 
                                     II-7
<PAGE>
 
                                   SIGNATURES
 
  Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Oak Brook and State of
Illinois on September 29, 1998.
 
                                         GATES CONSTRUCTION CORP.
 
                                           /s/ Douglas B. Mackie
                                         By: __________________________________
                                           Douglas B. Mackie
                                           President & Chief Executive Officer
 
                               POWER OF ATTORNEY
 
  KNOWN TO ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Douglas B. Mackie and Bruce J. Biemeck,
each and individually, his or her attorneys-in-fact, with full power of
substitution and resubstitution, for him or her in any and all capacities, to
sign any or all amendments or post-effective amendments to this Registration
Statement or any Registration Statement for the same offering that is effective
upon filing pursuant to Rule 462(b) under the Securities Act of 1933, as
amended, with the Securities and Exchange Commission, granting unto each of
such attorneys-in-fact and agents full power and authority to do and perform
each and every act and thing requisite and necessary in connection with such
matters and hereby ratifying and confirming all that each such attorney-in-
fact, or his agent or substitutes, may do or cause to be done by virtue hereof.
 
  Pursuant to the requirements of the Securities Act of 1933, as amended, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
 
                NAME                         TITLE                 DATE
 
       /s/ Douglas B. Mackie          President, Chief      September 29, 1998
- ------------------------------------  Executive Officer           
         Douglas B. Mackie            and Director
                                      (principal
                                      executive officer)
 
        /s/ Bruce J. Biemeck          Senior Vice           September 29, 1998
- ------------------------------------  President, Chief         
          Bruce J. Biemeck            Financial Officer
                                      and Treasurer
                                      (principal
                                      financial officer
                                      and principal
                                      accounting officer)
                                      and Director
 
        /s/ Richard M. Lowry          Director              September 29, 1998
- ------------------------------------                             
          Richard M. Lowry
 
 
                                      II-8
<PAGE>
 
                                  SIGNATURES
 
  Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Oak Brook and State of
Illinois on September 29, 1998.
 
                                          FIFTY-THREE DREDGING CORPORATION
 
                                             /s/ Douglas Mackie
                                          By: _________________________________
                                             Douglas B. Mackie
                                             President & Chief Executive
                                             Officer
 
                               POWER OF ATTORNEY
 
  KNOWN TO ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Douglas B. Mackie and Bruce J. Biemeck,
each and individually, his or her attorneys-in-fact, with full power of
substitution and resubstitution, for him or her in any and all capacities, to
sign any or all amendments or post-effective amendments to this Registration
Statement or any Registration Statement for the same offering that is
effective upon filing pursuant to Rule 462(b) under the Securities Act of
1933, as amended, with the Securities and Exchange Commission, granting unto
each of such attorneys-in-fact and agents full power and authority to do and
perform each and every act and thing requisite and necessary in connection
with such matters and hereby ratifying and confirming all that each such
attorney-in-fact, or his agent or substitutes, may do or cause to be done by
virtue hereof.
 
  Pursuant to the requirements of the Securities Act of 1933, as amended, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
 
                NAME                           TITLE                 DATE
 
        /s/ Douglas B. Mackie          President, Chief      September 29, 1998
- -------------------------------------  Executive Officer            
          Douglas B. Mackie            and Director
                                       (principal executive
                                       officer)
 
        /s/ Bruce J. Biemeck           Senior Vice           September 29, 1998
- ---------------------------------      President, Chief             
        Bruce J. Biemeck               Financial Officer
                                       and Treasurer
                                       (principal financial
                                       officer and
                                       principal accounting
                                       officer)
 
           /s/ Mark Thomas             Director              September 29, 1998 
- -------------------------------------                         
             Mark Thomas
 
 
                                     II-9
<PAGE>
 
                         INDEPENDENT AUDITORS' CONSENT
 
  We consent to the use in this Registration Statement of Great Lakes Dredge &
Dock Corporation on Form S-4 of our report dated January 30, 1998, appearing
in the Prospectus, which is part of this Registration Statement.
 
  We also consent to the reference to us under the heading "Experts" in such
Prospectus.
 
DELOITTE & TOUCHE LLP
 
Chicago, Illinois
September 29, 1998
 
                                     II-10
<PAGE>
 
                    INDEPENDENT PUBLIC ACCOUNTANTS' CONSENT
 
  We consent to the inclusion in this Registration Statement on Form S-4 being
filed by Great Lakes Dredge & Dock Corporation of our report, dated January
23, 1998, on the financial statements of Amboy Aggregates (A Joint Venture) as
of December 31, 1997 and 1996 and for each of the three years in the period
ended December 31, 1997. We also consent to the reference to our firm under
the caption "Experts" in the Prospectus of the Registration Statement.
 
                                          J. H. Cohn LLP
 
Roseland, New Jersey
September 28, 1998
 
                                     II-11

<PAGE>
 
                                                                    EXHIBIT 2.01
                                                                    ------------

                          PLAN AND AGREEMENT OF MERGER

          THIS IS A PLAN AND AGREEMENT OF MERGER DATED AS OF AUGUST 19, 1998
(THE "AGREEMENT") BETWEEN GREAT LAKES DREDGE & DOCK CORPORATION, A DELAWARE
CORPORATION (THE "COMPANY") AND GREAT LAKES DREDGE & DOCK ACQUISITION, INC., A
DELAWARE CORPORATION ("MERGER SUB"). THE COMPANY AND MERGER SUB ARE SOMETIMES
HEREINAFTER COLLECTIVELY REFERRED TO AS THE "CONSTITUENT CORPORATIONS."

                                  BACKGROUND
                                  ----------

          The Boards of Directors of the Company and Merger Sub, deeming it to
be advantageous to their respective corporations and their stockholders, have
duly approved this Agreement and its execution. Accordingly, the parties hereto
agree as follows:

                                     TERMS
                                     -----

                                   ARTICLE I

 
          1.1.   Merger. Subject to the terms and conditions hereof, at the
                 ------ 
Effective Time (as defined in Section 1.5) Merger Sub shall be merged with and
into the Company (the "Merger") pursuant to provisions of the Delaware General
Corporation Law, the separate existence of Merger Sub shall cease, and the
Company shall be the surviving corporation (the "Surviving Corporation") and
continue its existence under Delaware law under the name "Great Lakes Dredge &
Dock Corporation."

          1.2.   Effect of Merger. At the Effective Time of the Merger, all the
                 ----------------
rights, property, real, personal and mixed, and franchises of each of the
Constituent Corporations, and all debts due on whatever account to either of
them, including subscriptions to shares and other things in action or belonging
to either of them, shall be taken and deemed to be transferred to and vested in
the Surviving Corporation, without further act or deed, and the Surviving
Corporation shall thenceforth be responsible for all the liabilities and
obligations of each of the Constituent Corporations.

          1.3.   Stockholder Approval. Subsequent to the execution of this
                 --------------------
Agreement, each of the Company and Merger Sub shall submit this Agreement to its
stockholders for their approval pursuant to the applicable provisions of the
Delaware General Corporation Law.

          1.4.   Filing of the Agreement. Following the approval of this
                 -----------------------
Agreement by the stockholders of the Company and Merger Sub, and provided that
this Agreement has not been terminated pursuant to section 4.1 hereof, the
parties hereto will cause the Merger to be consummated by filing with the
Secretary of State of Delaware this Agreement or the appropriate Certificate of
Merger (the "Certificate of Merger") duly executed by the Company and Merger Sub
in accordance with the requirements of the Delaware General Corporation Law.
<PAGE>
 
          1.5.   Effective Time. The Merger shall become effective at such time
                 --------------
as this Agreement shall be filed with the Secretary of State of the State of
Delaware (such time of effectiveness being herein sometimes referred to as the
"Effective Time").

                                  ARTICLE II

          2.1.   Certificate of Incorporation. Immediately prior to the
                 ----------------------------    
Effective Time and until thereafter amended or supplemented in accordance with
their respective terms and Delaware General Corporation Law, the Certificate of
Incorporation of the Company shall be as set forth in Exhibit A attached hereto
                                                      ---------
and hereby made a part hereof. The Certificate of Incorporation attached hereto
as Exhibit A shall be the Certificate of Incorporation of the Surviving
   ---------
Corporation until thereafter amended as provided therein and by law.

          2.2.   Bylaws. The Bylaws of Merger Sub as in effect immediately prior
                 ------
to the Effective Time shall be the Bylaws of the Surviving Corporation until
thereafter amended as provided therein and by law.

          2.3.   Directors. The directors of Merger Sub immediately prior to the
                 ---------
Effective Time shall continue as the directors of the Surviving Corporation
after the Effective Time, to hold office until the expiration of their current
terms, or their prior resignation, removal or death.

          2.4.   Company Officers. The officers of the Company immediately prior
                 ----------------
to the Effective Time shall continue as the officers of the Surviving
Corporation after the Effective Time, to hold office until the expiration of
their current terms, or their prior resignation, removal or death.

                                  ARTICLE III

          3.1.   Conversion of Stock. At the Effective Time by virtue of the
                 -------------------
Merger and without any action on the part of the holder of any of the capital
stock of the Company or Merger Sub:

                 (a)   Definitions. For purposes of this agreement the following
                       -----------
definitions shall apply:

                       (i)   "Effective Time Merger Consideration" means
$155,995,675.

                       (ii)  "Per Share Effective Time Merger Consideration"
means the quotient obtained by dividing (i) the Effective Time Merger
Consideration by (ii) the total number of shares of the Company's Common Stock,
no par value per share ("Company Common Stock"), outstanding at the Effective
Time ("Total Shares of Company Common Stock").

                 (b)   Company Common Stock.
                       --------------------

                       (i)   Each share of Company Common Stock issued and
outstanding immediately prior to the Effective Time (other than any Retained
Shares (as hereinafter defined), Vectura Shares (as hereinafter defined), and
Dissenting Shares (as hereinafter
<PAGE>
 
defined)) shall be canceled and extinguished and converted into the right to
receive, without interest, the Per Share Effective Time Merger Consideration.

                 (ii)  Retained Shares. All shares of Company Common Stock held
                       ---------------
by members of the Company management listed on Exhibit B attached hereto (such
                                               ---------
shares being the "Retained Shares"), shall be canceled and extinguished and
converted into the number of validly issued, fully paid and non-assessable
shares of Class A Common Stock, par value $.01 per share, of the Surviving
Corporation ("Surviving Corp. Class A Common"), and the number of validly
issued, fully paid and non-assessable shares of 12% Series A Cumulative
Compounding Preferred Stock, par value $.01 per share, of the Surviving
Corporation ("Surviving Corp. Series A Preferred") as set forth opposite each
shareholder's name on Exhibit B.
                      --------- 

                 (iii) Vectura Shares. All shares of Company Common Stock held
                       --------------
by Vectura Holding Company LLC (such shares being the "Vectura Shares"), shall
be canceled and extinguished and converted into 749,753 validly issued, fully
paid and non-assessable shares of Surviving Corp. Class A Common and 7,500
validly issued, fully paid and non-assessable shares of Surviving Corp. Series A
Preferred.

                 (iv)  Dissenting Shares. Notwithstanding anything herein to the
                       -----------------  
contrary, any shares of Company Common Stock issued and outstanding prior to the
Effective Time and held by a holder (if any) who has exercised the right to
demand payment for fair value of such shares in accordance with Article 262 of
the General Corporation Law of Delaware or similar provisions (the "Dissenting
Shares"), shall not be converted into a right to receive the consideration
referred to in the foregoing paragraphs (i) through (iii) (the "Merger
Consideration") unless such holder fails to perfect or otherwise loses such
holder's right to such payment or appraisal, if any. If, after the Effective
Time, such holder fails to perfect or loses any such right to appraisal, then as
of the later of the Effective Time or the occurrence of such event, such
holders' shares of Company Common Stock shall automatically be converted into
and represent only the right to receive the Per Share Effective Time Merger
Consideration, without interest, as provided in this Article 3.1(b) upon
surrender of the certificate or certificates representing any shares of Company
Common Stock. The Company shall give prompt notice to Merger Sub of any demands
received by the Company for payment or appraisal of shares of Company Common
Stock, and Merger Sub shall have the right to participate in all negotiations
and proceedings with respect to such demands. The Company shall not, except with
the mutual written approval of Merger Sub, settle or offer to settle any such
demands.

          (c)    Merger Sub Common and Preferred Stock
                 -------------------------------------

                 (i)   Each share of Class A Common Stock, par value $.01 per
share, of Merger Sub ("Merger Sub Class A Common") issued and outstanding
immediately prior to the Effective Time shall be canceled and extinguished and
converted into one validly issued, fully paid and non-assessable share of
Surviving Corp. Class A Common; the shares of Merger Sub Class A Common so
converted shall cease to exist as such, and shall exist only as shares of
Surviving Corp. Class A Common; and shares of Merger Sub Class A Common held in
Merger Sub's treasury shall be canceled and retired.
<PAGE>
 
                 (ii)  Each share of Class B Common Stock, par value $.01 per
share, of Merger Sub ("Merger Sub Class B Common") issued and outstanding
immediately prior to the Effective Time shall be canceled and extinguished and
converted into one validly issued, fully paid and non-assessable share of Class
B Common Stock, par value $.01 per share, of the Surviving Corporation
("Surviving Corp. Class B Common"); the shares of Merger Sub Class B Common so
converted shall cease to exist as such, and shall exist only as shares of
Surviving Corp. Class B Common; and shares of Merger Sub Class B Common held in
Merger Sub's treasury shall be canceled and retired.

                 (iii) Each share of 12% Series A Cumulative Compounding
Preferred Stock, par value $.01 per share, of Merger Sub ("Merger Sub Series A
Preferred") issued and outstanding immediately prior to the Effective Time shall
be canceled and extinguished and converted into one validly issued, fully paid
and non-assessable share of Surviving Corp. Series A Preferred; the shares of
Merger Sub Series A Preferred so converted shall cease to exist as such, and
shall exist only as shares of Surviving Corp. Series A Preferred; and shares of
Merger Sub Series A Preferred held in the Merger Sub's treasury shall be
canceled and retired.

          3.2.   Fractional Shares; Adjustments. No fractional shares of the
                 ------------------------------
Surviving Corporation shall be issued as a result of the conversion provided for
in Section 3.1(a). In lieu of any such fractional shares, the holder of a
fractional interest in shares of common or preferred stock in the Surviving
Corporation shall be entitled to receive a cash payment therefor in an amount
equal to the value of one dollar ($1) per share of Surviving Corp. Class A
Common and one thousand dollars ($1,000) per share of Surviving Corp. Series A
Preferred.

          3.3.   Shareholders Agreements; Option Plans. At the Effective Time,
                 -------------------------------------
all shareholders agreements by and among the Company and the shareholders and
all option plans of the Company shall be terminated and have no further force
and effect; provided, that this provision shall in no event affect any
            --------  
shareholder agreement in respect of the Surviving Corp. Class A Common,
Surviving Corp. Class B Common or Surviving Corp. Series A Preferred dated as
of, on or after the date of the Effective Time.

                                  ARTICLE IV

          4.1.   Termination. This Plan and Agreement of Merger may be
                 ----------- 
terminated and the Merger abandoned by action of the board of directors of
either the Company or Merger Sub at any time before the Effective Time,
notwithstanding the approval in the manner set forth in Section 1.3.

          4.2.   Governing Law. This Agreement shall be governed by and
                 -------------
construed in accordance with the laws of the State of Delaware.

          4.3.   Headings. The section headings herein are for convenience of
                 --------
reference only and shall not affect the construction or interpretation of this
Agreement.
<PAGE>
 
          IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the day and year first above written.



                                            GREAT LAKES DREDGE & DOCK 
                                              ACQUISITION, INC.


Attest: /s/ Paul D. Delva                   By: /s/ Michael A. Delaney
       -----------------------------           ------------------------------
       Name:                                   Name: Michael A. Delaney
       Title:                                  Title: Vice President


                                            GREAT LAKES DREDGE & DOCK 
                                              CORPORATION


Attest: /s/ Mark R. Thomas                  By: /s/ Douglas B. Mackie
       -----------------------------           ------------------------------
       Name:                                   Name:
       Title:                                  Title:
<PAGE>
 
Exhibit A -- Restated Certificate of Incorporation of Great Lakes Dredge & Dock
             Corporation.

Exhibit B -- Schedule of Retained Shares.

<PAGE>
 
                                                                    EXHIBIT 3.01
                                                                    ------------

                     RESTATED CERTIFICATE OF INCORPORATION

                                       OF

                     GREAT LAKES DREDGE & DOCK CORPORATION

          1.  Name. The name of the Corporation is Great Lakes Dredge & Dock
              ----
Corporation.

          2.  Registered Office and Agent. The address of the Corporation's
              ---------------------------
registered office in the State of Delaware is 1209 Orange Street, in the City of
Wilmington, County of New Castle, DE 19801. The name of the Corporation's
registered agent at such address is The Corporation Trust Company.

          3.  Purpose. The purposes for which the Corporation is formed are to
              -------
engage in any lawful act or activity for which corporations may be organized
under the General Corporation Law of Delaware and to possess and exercise all of
the powers and privileges granted by such law and any other law of Delaware.

          4.  Authorized Capital. The aggregate number of shares of stock which
              ------------------   
the Corporation shall have authority to issue is 50,250,000 shares, divided into
three (3) classes consisting of 250,000 shares of Preferred Stock, par value
$.01 per share ("Preferred Stock"); 25,000,000 shares of Class A Common Stock,
par value $.01 per share ("Class A Common Stock"); and 25,000,000 shares of
Class B Common Stock, par value $.01 per share ("Class B Common Stock"). Class A
Common Stock and Class B Common Stock are hereinafter sometimes collectively
referred to as "Common Stock."

          The following is a statement of the designations, preferences,
qualifications, limitations, restrictions and the special or relative rights
granted to or imposed upon the shares of each such class and upon the shares of
the first series of Preferred Stock.

          A.  PREFERRED STOCK
              --------------- 

              1.  Issue in Series. Preferred Stock may be issued from time to
                  ---------------
          time in one or more series, each such series to have the terms stated
          herein and in the resolution of the Board of Directors of the
          Corporation providing for its issue. All shares of any one series of
          Preferred Stock will be identical, but shares of different series of
          Preferred Stock need not be identical or rank equally except insofar
          as provided by law or herein.

              2.  Creation of Series. In addition to the 12% Series A Cumulative
                  ------------------ 
          Compounding Preferred Stock ("Series A Preferred Stock") provided for
          herein, the Board of Directors will have the authority to adopt
          amendments to these Articles to cause to be created one or more series
          of Preferred Stock, and to 
<PAGE>
 
          determine and fix with respect to each series prior to the issuance of
          the series to which such resolution relates :

                   a.  The distinctive designation of the series and the number
              of shares which will constitute the series, which number may be
              increased or decreased (but not below the number of shares then
              outstanding) from time to time by action of the Board of
              Directors;

                   b.  The dividend rate and the times of payment of dividends
              on the shares of the series, whether dividends will be cumulative,
              and if so, from what date or dates;

                   c.  The price or prices at which, and the terms and
              conditions on which, the shares of the series may be redeemed at
              the option of the Corporation;

                   d.  Whether or not the shares of the series will be entitled
              to the benefit of a retirement or sinking fund to be applied to
              the purchase or redemption of such shares and, if so entitled, the
              amount of such fund and the terms and provisions relative to the
              operation thereof;

                   e.  Whether or not the shares of the series will be
              convertible into, or exchangeable for, any other shares of stock
              of the Corporation or other securities, and if so convertible or
              exchangeable, the conversion price or prices, or the rates of
              exchange, and any adjustments thereof, at which such conversion or
              exchange may be made, and any other terms and conditions of such
              conversion or exchange;

                   f.  The rights of the shares of the series in the event of
              voluntary or involuntary liquidation, dissolution or winding up of
              the Corporation;
   
                   g.  Whether or not the shares of the series will have
              priority over or be on a parity with or be junior to the shares of
              any other series or class in any respect or will be entitled to
              the benefit of limitations restricting the issuance of shares of
              any other series or class having priority over or being on a
              parity with the shares of such series in any respect, or
              restricting the payment of dividends on or the making of other
              distributions in respect of shares of any other series or class
              ranking junior to the shares of the series as to dividends or
              assets, or restricting the purchase or redemption of the shares of
              any such junior series or class, and the terms of any such
              restriction;

                   h.  Whether the series will have voting rights, in addition
              to any voting rights provided by law, and, if so, the terms of
              such voting rights; and

                                       2
<PAGE>
 
           i.  Any other preferences, qualifications, privileges, options and
     other relative or special rights and limitations of that series.
 
     3.    Dividends. Holders of Preferred Stock shall be entitled to receive,
           ---------
when and as declared by the Board of Directors, out of funds legally available
for the payment thereof, dividends at the rates fixed by the Board of Directors
for the respective series, and no more, before any dividends shall be declared
and paid, or set apart for payment, on Common Stock with respect to the same
dividend period.

     4.    Preference on Liquidation. In the event of the voluntary or
           -------------------------
involuntary liquidation, dissolution or winding up of the Corporation, holders
of each series of Preferred Stock will be entitled to receive the amount fixed
for such series plus, in the case of any series on which dividends will have
been determined by the Board of Directors to be cumulative, an amount equal to
all dividends accumulated and unpaid thereon to the date of final distribution
whether or not earned or declared before any distribution shall be paid, or set
aside for payment, to holders of Common Stock. If the assets of the Corporation
are not sufficient to pay such amounts in full, holders of all shares of
Preferred Stock will participate in the distribution of assets ratably in
proportion to the full amounts to which they are entitled or in such order or
priority, if any, as will have been fixed in the resolution or resolutions
providing for the issue of the series of Preferred Stock. Neither the merger nor
consolidation of the Corporation into or with any other corporation, nor a sale,
transfer or lease of all or part of its assets, will be deemed a liquidation,
dissolution or winding up of the corporation within the meaning of this
paragraph except to the extent specifically provided for herein.

     5.    Redemption. The Corporation, at the option of the Board of Directors,
           ----------
may redeem all or part of the shares of any series of Preferred Stock on the
terms and conditions fixed for such series.

     6.    Voting Rights. Except as otherwise required by law, as otherwise
           -------------
provided herein or as otherwise determined by the Board of Directors as to the
shares of any series of Preferred Stock prior to the issuance of any such
shares, the holders of Preferred Stock shall have no voting rights and shall not
be entitled to any notice of meeting of stockholders.

B.   12% SERIES A CUMULATIVE COMPOUNDING PREFERRED STOCK
     ---------------------------------------------------

     1.  Designation; Number of Shares. The first series of Preferred Shares
         -----------------------------
shall be designated as 12% Series A Cumulative Compounding Preferred Stock
("Series A Preferred Stock"), and the number of shares which shall constitute
such series shall be 250,000. The par value of the Series A Preferred Stock
shall be $.01 per share.


                                       3
<PAGE>
 
     2.    Accrual and Payment of Dividends.
           --------------------------------

           a.  The holders of Series A Preferred Stock shall be entitled to
     receive, when, as and if declared by the Board of Directors out of funds of
     the Corporation legally available therefor, cumulative cash dividends at
     the rate of $120 per share per annum.

               Dividends on the Series A Preferred Stock shall be payable in
     annual installments in arrears commencing September 30, 1999 and thereafter
     on the thirtieth day of September (unless such day is not a business day in
     which event on the last preceding business day) in each such year
     (hereinafter referred to as a "Dividend Accrual Date"), except that the
     dividend payment payable on September 30, 1999 shall be calculated from the
     date of original issuance through September 30, 1999. Each such dividend on
     Series A Preferred Stock when paid shall be payable to holders of record as
     they appear on the stock books of the Corporation on the date established
     by the Board of Directors of the Corporation as the record date for the
     payment of such dividend (which record date shall not precede the date upon
     which the resolution fixing such record date is adopted and which record
     date shall be not more than sixty days prior to such action). If no record
     date is fixed, the record date for determining holders for such purpose
     shall be at the close of business on the date on which the Board of
     Directors adopts the resolution relating to such dividend payment.
     Dividends with respect to any shares of Series A Preferred Stock shall
     accrue (whether or not earned or declared) from the date of issuance of
     such shares.

               b.  Dividends on the Series A Preferred Stock shall be
     cumulative, whether or not earned or declared, so that if at any time full
     cumulative dividends at the rate aforesaid on all Series A Preferred Stock
     then outstanding to the end of the annual dividend period next preceding
     such time shall not have been paid, the amount of the deficiency shall be
     paid before any sum shall be set aside for or applied by the Corporation to
     the purchase, redemption or other acquisition for value of any Junior
     Shares (as such term is defined in Section 4.B(9)) (either pursuant to any
     applicable sinking fund requirement or otherwise) or any dividend or other
     distribution shall be paid or declared and set apart for payment on any
     Junior Shares (other than a dividend payable in Junior Shares); provided,
                                                                     --------
     however, that the foregoing shall not prohibit the Corporation from
     -------
     repurchasing Junior Shares from a former employee of the Corporation (or a
     subsidiary of the Corporation) where such repurchase arises from the
     Corporation's option to repurchase such shares upon the termination of such
     employee's employment with the Corporation (or a subsidiary) pursuant to a
     written agreement between the Corporation and such employee. Accrued
     dividends on the Series A Preferred Stock if not paid on the first or any
     subsequent Dividend Accrual Date following accrual 

                                       4
<PAGE>
 
     shall thereafter accrue additional dividends in respect thereof (the
     "Additional Dividends"), compounded annually, at the rate of 12% per annum.

           c.  When dividends are not paid in full upon the Series A Preferred
     Stock and any other stock ranking on a parity as to dividends with the
     Series A Preferred Stock, all dividends paid upon Series A Preferred Stock
     and any other Shares ranking on a parity as to dividends with the Series A
     Preferred Stock shall be paid pro rata so that in all cases the amount of
     dividends paid per share of Series A Preferred Stock and such other Shares
     shall bear the same ratio that accrued dividends per share on the Series A
     Preferred Stock and such other shares bear to each other. Except as
     provided in the preceding sentence, unless full cumulative dividends on the
     Series A Preferred Stock have been paid, no dividends shall be declared or
     paid or set aside for payment upon any other shares of the Corporation
     ranking on a parity with the Series A Preferred Stock as to dividends.

           d.  An annual dividend period shall commence on the day following a
     Dividend Accrual Date and shall end on the next succeeding Dividend Accrual
     Date.

3.   Preference on Liquidation.
     -------------------------

     a.    In the event that the Corporation shall be liquidated, dissolved or
wound up, whether voluntarily or involuntarily, after all creditors of the
Corporation shall have been paid in full, the holders of the Series A Preferred
Stock shall be entitled to receive, out of the assets of the Corporation legally
available for distribution to its shareholders, whether from capital, surplus or
earnings, before any amount shall be paid to the holders of any Junior Shares,
an amount equal to $1000 in cash per share plus an amount equal to full
cumulative dividends (whether or not earned or declared) accrued and unpaid
thereon (including Additional Dividends) to the date of final distribution, and
no more. If upon any liquidation, dissolution or winding up of the Corporation,
the net assets of the Corporation shall be insufficient to pay the holders of
all outstanding Series A Preferred Stock and of any shares ranking on a parity
with the Series A Preferred Stock the full amounts to which they respectively
shall be entitled, such assets, or the proceeds thereof, shall be distributed
ratably among the holders of the Series A Preferred Stock and of any shares of
stock ranking on a parity with the Series A Preferred Stock. Holders of Series A
Preferred Stock shall not be entitled, upon the liquidation, dissolution or
winding up of the Corporation, to receive any amounts with respect to such
shares other than the amounts referred to in this Section 4.B(3)(a).

                                       5
<PAGE>
 
     b.  Neither the purchase nor redemption by the Corporation of any shares of
any class in any manner permitted by these Articles or any amendment hereof, nor
the merger or consolidation of the Corporation with or into any other
corporation or corporations, nor a sale, transfer or lease of all or
substantially all of the Corporation's assets shall be deemed to be a
liquidation, dissolution or winding up of the Corporation for the purposes of
this Section 4.B(3); provided, however, that any consolidation or merger of the
                     --------  -------
Corporation in which the Corporation is not the surviving entity shall be deemed
to be a liquidation, dissolution or winding up of the affairs of the Corporation
within the meaning of this Section 4.B(3) if, (A) in connection therewith, the
holders of Common Shares of the Corporation receive as consideration, whether in
whole or in part, for such Common Shares (1) cash, (2) notes, debentures or
other evidences of indebtedness or obligations to pay cash or (3) preferred
stock of the surviving entity (whether or not the surviving entity is the
Corporation) which ranks on a parity with or senior to the preferred shares
received by holders of the Series A Preferred Stock with respect to liquidation
or dividends or (B) the holders of the Series A Preferred Stock do not receive
preferred shares of the surviving entity with rights, powers and preferences
equal to (or more favorable to the holders than) the rights, powers and
preferences of the Series A Preferred Stock.

4.   Redemption.
     ----------

     a.    All outstanding shares of Series A Preferred Stock shall be redeemed
from funds legally available therefor on September 30, 2018 (the "Mandatory
Redemption Date"), at a price per share equal to $1000 plus an amount per share
equal to full cumulative dividends (whether or not earned or declared) accrued
and unpaid thereon (including Additional Dividends) to the Mandatory Redemption
Date.

     b.    The Series A Preferred Stock may be redeemed from funds legally
available therefor, in whole or in part, at the election of the Corporation,
expressed by resolution of the Board of Directors, at any time and from time to
time at a price per share equal to $1000 plus an amount per share equal to full
cumulative dividends (whether or not earned or declared) accrued and unpaid
thereon (including Additional Dividends) to the date of redemption.

     c.    The aggregate amount of the redemption price pursuant to Section
4.B(4)(a) or (b) is hereinafter referred to as the "Series A Redemption Price"
with respect to such redemption. The Mandatory Redemption Date and the date of
any redemption pursuant to Section 4.B(4)(b) are each hereinafter referred to
individually as a "Redemption Date."

                                       6
<PAGE>
 
     5.  Redemption Procedure.
         -------------------- 

         a.  A redemption pursuant to Section 4.B(4) shall be accomplished in
     the manner and with the effect as set forth in this Section 4.B(5).

         b.  Notice of the redemption of Series A Preferred Stock pursuant to
     Section 4.B(4) shall be given by mail not less than ten (10) days prior to
     the Redemption Date. If less than all the outstanding Series A Preferred
     Stock is to be redeemed, the selection of shares for redemption shall be
     made pro rata and the notice of redemption to a holder shall state the
     number of Series A Preferred Stock of such holder to be redeemed. The
     amount of the Series A Redemption Price shall be deposited on or before the
     Redemption Date in trust for the account of the holders of Series A
     Preferred Stock entitled thereto with a bank or trust company in good
     standing doing business in the State of New York and having capital and
     surplus of at least $100,000,000 (the date of such deposit being
     hereinafter in this Section 4.B(5) referred to as the "date of deposit").

         c.  Notice of the date on which, and the name and address of the bank
     or trust company with which, the deposit has been or will be made shall be
     included in the notice of redemption. On and after the Redemption Date
     (unless default shall be made by the Corporation in providing money for the
     payment of the Series A Redemption Price pursuant to the notice of
     redemption), or if the Corporation shall make such deposit on or before the
     date specified therefor in the notice of redemption, then on and after the
     date of deposit (provided notice of redemption has been duly given), all
     dividends on the Series A Preferred Stock so called for redemption shall
     cease to accrue and, notwithstanding that any certificate for Series A
     Preferred Stock is not surrendered for cancellation, the shares represented
     thereby shall no longer be deemed outstanding and all rights of the holders
     thereof as shareholders of the Corporation with respect to such shares
     shall cease and terminate, except the right to receive the Series A
     Redemption Price as hereinafter provided.

         d.  At any time on or after the Redemption Date, or if the Corporation
     shall deposit the money for such redemption prior to the Redemption Date,
     then at any time on or after the date of deposit, which time shall be
     specified by the Corporation in the notice of redemption and which shall
     not be later than the Redemption Date, the holders of record of the Series
     A Preferred Stock to be redeemed shall be entitled to receive the Series A
     Redemption Price upon actual delivery to the bank or trust company with
     which such deposit shall be made of certificates for the shares to be
     redeemed, such certificates, if required, to be duly endorsed in blank or
     accompanied by proper instruments of assignment and transfer duly endorsed
     in blank. The making of such deposit with any such bank or

                                       7
<PAGE>
 
     trust company shall not relieve the Corporation of liability for payment of
     the Series A Redemption Price.

         e.  Any money so deposited which shall remain unclaimed by the holders
     of such Series A Preferred Stock at the end of two (2) years after the
     Redemption Date shall be paid by such bank or trust company to the
     Corporation, which shall thereafter, to the extent of the money so repaid,
     be liable for the payment of the Series A Redemption Price. Any interest
     accrued on money so deposited shall be paid to the Corporation from time to
     time.

     6.  Optional Exchange. The Series A Preferred Stock may be exchanged, at
         -----------------
the Corporation's option at any time and from time to time, in whole or in part,
for junior subordinated debentures to be issued by the Corporation in
substantially the form attached as Annex A hereto ("Exchange Debentures") at the
rate of $1000 per share plus an amount per share equal to full cumulative
dividends (whether or not earned or declared) accrued and unpaid thereon
(including all dividends which have accrued since the most recent Dividend
Accrual Date) to the date established by the Board of Directors for such
exchange (the Exchange Date") (the aggregate of such amounts is hereinafter
referred to as the "Exchange Amount"). The Exchange Debentures shall bear
interest at a rate equal to the lesser of 12% and the maximum interest rate
permitted to be deducted as accrued under the relevant provisions of the
Internal Revenue Code of 1986 and the rules and regulations promulgated
thereunder in effect on the Exchange Date. If less than all the shares of Series
A Preferred Stock is to be exchanged, the selection of shares to be exchanged
shall be pro rata. The election of the Corporation to exchange the shares of
Series A Preferred Stock for Exchange Debentures pursuant to this Section 4.B(6)
must be made by the affirmative vote of at least eighty percent (80%) of all the
directors of the Corporation then in office.

     7.  Exchange Procedure
         ------------------

         a.  Any exchange pursuant to Section 4.B(6) shall be accomplished in
     the manner and with the effect as set forth in this Section 4.B(7).

         b.  Notice of the exchange of Series A Preferred Stock pursuant to
     Section 4.B(6) shall be given by first class mail to each holder of record
     on the record date for such exchange at such holder's address as the same
     appears on the stock register of the Corporation not less than ten (10)
     days and not more than sixty (60) days prior to the Exchange Date. Each
     such notice shall state: (A) the Exchange Date, (B) the place or places
     where certificates for such shares of Series A Preferred Stock are to be
     surrendered for exchange into the Exchange Debentures, (C) that dividends
     on the Series A Preferred Stock to be exchanged will cease to 

                                       8
<PAGE>
 
     accrue on such Exchange Date and (D) if less than all the shares of Series
     A Preferred Stock is to be exchanged the number of shares of the holder to
     be exchanged. The form of the Exchange Debentures may not be amended or
     supplemented before the Exchange Date without the affirmative vote or
     consent of the holders of a majority of the outstanding shares of Series A
     Preferred Stock, except for those changes which would not adversely affect
     the legal rights of the holders.

         c.  On and after the Exchange Date, all dividends on the Series A
     Preferred Stock so called for exchange shall cease to accrue and,
     notwithstanding that any certificate for shares of Series A Preferred Stock
     is not surrendered for cancellation, the shares represented thereby shall
     no longer be deemed outstanding and all rights of the holders thereof as
     stockholders of the Corporation shall cease and terminate, except the right
     to receive the Exchange Debentures as herein provided.

         d.  At any time on or after the Exchange Date, the holders of record of
     the Series A Preferred Stock to be exchanged shall be entitled to receive
     the amount of Exchange Debentures set forth herein upon actual delivery to
     the Corporation of certificates for the shares to be exchanged, such
     certificates, if required, to be duly endorsed in blank or accompanied by
     proper instruments of assignment and transfer duly endorsed in blank. The
     person or persons entitled to receive the Exchange Debentures issuable upon
     exchange shall be treated for all purposes as the registered holder or
     holders of such Exchange Debentures.

         e.  The Corporation shall not be required to honor any request to
     register a transfer or exchange of the Series A Preferred Stock for the
     fifteen (15) days prior to the Exchange Date. The Corporation will cause
     the Exchange Debentures to be authenticated on the Exchange Date.

     8.  Voting. Except as required by law and except for any voting by the
         ------
holders of the Series A Preferred Stock as part of a separate class or series
pursuant to Section 4.B(7) hereunder or any other provision of these Articles,
no holder of Series A Preferred Stock, as such holder, shall be entitled to vote
on any matter submitted to a vote of shareholders. On any matters on which the
holders of the Series A Preferred Stock shall be entitled to vote, they shall be
entitled to one vote for each share held. Except as otherwise required by law or
as otherwise provided herein, the holders of Series A Preferred Stock shall not
be entitled to notice of any meeting of shareholders.

     9.  Other Rights. Without the written consent of the holders of a majority
         ------------
of the outstanding shares of Series A Preferred Stock or the vote of the holders
of a majority of the outstanding shares of Series A Preferred Stock at a meeting
of the holders of Series A Preferred Stock called for such purpose, the
Corporation shall not (i) exchange the shares of Series A Preferred Stock for

                                       9
<PAGE>
 
Exchange Debentures pursuant to Section 4.B(6), (ii) create, authorize or issue
any other class or series of stock entitled to a preference prior to Series A
Preferred Stock upon any dividend or distribution or any liquidation,
distribution of assets, dissolution or winding up of the Corporation, or
increase the authorized amount of any such other class or series, or (iii)
amend, alter or repeal any provision of the Corporation's Certificate of
Incorporation so as to adversely affect the relative rights and preferences of
the Series A Preferred Stock; provided however, that any such amendment that
                              -------- -------
changes the dividend payable on the Series A Preferred Stock shall require the
affirmative vote of the holder of each shares of Series A Preferred Stock at a
meeting of such holders called for such purpose or the written consent of the
holder of each such share of Series A Preferred Stock.

     10.  Acknowledgment. Each holder of Series A Preferred Stock, by acceptance
          --------------
thereof, acknowledges and agrees that payments of dividends, interest, premium
and principal on, and redemption and repurchase of, such securities by the
Corporation are subject to restrictions contained in certain credit and
financing agreements of the Corporation.

     11.  Definitions. The following terms, when used in this Section 4.B, shall
          -----------
have the meanings set forth below:

          a.  As used herein, the amount of dividends "accrued" on any share of
     Series A Preferred Stock as at any date shall be calculated as the amount
     of any unpaid dividends accumulated thereon to and including the last
     preceding Dividend Accrual Date with respect to which dividends have not
     been paid, whether or not earned or declared (including the amount of any
     dividends accumulated on any share of Series A Preferred Stock from the
     preceding Dividend Accrual Date in the event of an optional redemption
     pursuant to Section 4.B(5)(b) or in the event of an exchange pursuant to
     Section 4.B(6)).

          b.  "corporation" shall mean a corporation, partnership, business
     trust, unincorporated organization, association, limited liability company
     or joint stock company.

          c.  "Junior Shares" shall mean any series or class of the capital
     stock of the Corporation now or hereafter authorized or issued by the
     Corporation, including any series or class of preferred shares, ranking
     junior to the Series A Preferred Stock with respect to dividends or
     distributions or upon the liquidation, distribution of assets, dissolution
     or winding-up of the Corporation, including without limitation the Common
     Shares.

          d.  "person" shall mean an individual, a corporation, partnership,
     trust, organization, association, government or any department or agency
     thereof, or any other individual or entity.

                                       10
<PAGE>
 
     C.  CLASS A AND CLASS B COMMON STOCK
         --------------------------------

         Except as otherwise provided herein, all shares of Class A Common Stock
     and Class B Common Stock will be identical and will entitle the holders
     thereof to the same rights and privileges.

         1.  Dividends. Holders of Common Stock will be entitled to receive such
             ---------
     dividends as may be declared by the Board of Directors, provided that if
                                                             --------
     dividends are declared which are payable in shares of Class A Common Stock
     or Class B Common Stock, dividends will be declared which are payable at
     the same rate on each class of Common Stock and the dividends payable in
     shares of Class A Common Stock will be payable to holders of Class A Common
     Stock and the dividends payable in shares of Class B Common Stock will be
     payable to holders of Class B Common Stock.

         2.  Conversion. Each record holder of Class A Common Stock will be
             ----------
     entitled to convert any or all of such holder's Class A Common Stock into
     the same number of shares of Class B Common Stock and each record holder of
     Class B Common Stock will be entitled to convert any or all of the shares
     of such holder's Class B Common Stock into the same number of shares of
     Class A Common Stock; provided, however, that at the time of conversion of
                           --------  -------
     shares of Class B Common Stock into shares of Class A Common Stock such
     holder would be permitted, pursuant to applicable law, to hold the total
     number of shares of Class A Common Stock which such holder would hold after
     giving effect to such conversion; and provided, further, that the
                                           --------  -------
     determination of a holder of Class B Common Stock that such holder is
     permitted pursuant to applicable law to convert Class B Common Stock into
     Class A Common Stock pursuant to this Section 2 shall be final and binding
     upon the Company.

             Each conversion of shares of one class of Common Stock into shares
     of another class of Common Stock will be effected by the surrender of the
     certificate or certificates representing the shares to be converted at the
     principal office of the Corporation at any time during normal business
     hours, together with a written notice by the holder of such shares stating
     the number of shares that any such holder desires to convert into the other
     class of Common Stock. Such conversion will be deemed to have been effected
     as of the close of business on the date on which such certificate or
     certificates have been surrendered and such notice has been received by the
     Corporation, and at such time the rights of any such holder with respect to
     the converted class of Common Stock will cease and the person or persons in
     whose name or names the certificate or certificates for shares of the other
     class of Common Stock are to be issued upon such conversion will be deemed
     to have become the holder or holders of record of the shares of such other
     class of Common Stock represented thereby.

             Promptly after such surrender and the receipt by the Corporation of
     the written notice from the holder hereinbefore referred to, the
     Corporation will

                                       11
<PAGE>
 
     issue and deliver in accordance with the surrendering holder's instructions
     the certificate or certificates for the other class of Common Stock
     issuable upon such conversion and a certificate representing any shares of
     Common Stock which were represented by the certificate or certificates
     delivered to the Corporation in connection with such conversion but which
     were not converted. The issuance of certificates for the other class of
     Common Stock upon conversion will be made without charge to the holder or
     holders of such shares for any issuance tax (except stock transfer taxes)
     in respect thereof or other cost incurred by the Corporation in connection
     with such conversion.

         3.  Transfers. The Corporation will not close its books against the
             ---------
     transfer of any share of Common Stock, or of any share of Common Stock
     issued or issuable upon conversion of shares of the other class of Common
     Stock, in any manner that would interfere with the timely conversion of
     such shares of Common Stock.

         4.  Subdivision and Combinations of Shares. If the Corporation in any
             --------------------------------------
     manner subdivides or combines the outstanding shares of any class of Common
     Stock, the outstanding shares of the other class of Common Stock will be
     proportionately subdivided or combined.

         5.  Reservation of Shares for Conversion. So long as any shares of any
             ------------------------------------
     class of Common Stock are outstanding, the Corporation will at all times
     reserve and keep available out of its authorized but unissued shares of
     Class A Common Stock and Class B Common Stock (or any shares of Class A
     Common Stock or Class B Common Stock which are held as treasury shares),
     the number of shares sufficient for issuance upon conversion.

         6.  Distribution of Assets. In the event of the voluntary or
             ----------------------
     involuntary liquidation, dissolution or winding up of the Corporation,
     holders of Common Stock will be entitled to receive all of the remaining
     assets of the Corporation available for distribution to its stockholders
     after all amounts to which the holders of Preferred Stock are entitled have
     been paid or set aside in cash for payment.

         7.  Voting Rights. The holders of Class A Common Stock shall have the
             -------------
     general right to vote for all purposes as provided by law. Each holder of
     Class A Common Stock shall be entitled at all elections of directors to as
     many votes as shall equal the number of votes which such holder would be
     entitled to cast for the election of directors with respect to his shares
     of stock multiplied by the number of directors to be elected, and such
     holder may cast all of such votes for a single director or may distribute
     them among the number to be voted for, or for any two or more of them as he
     may see fit, and to one vote for each share upon all other matters. Except
     as otherwise required by law, the holders of Class B Common Stock shall
     have no voting rights.

                                       12
<PAGE>
 
         8.  Merger, etc. In connection with any merger, consolidation, or
             -----------
     recapitalization in which holders of Class A Common Stock generally
     receive, or are given the opportunity to receive, consideration for their
     shares (a) all holders of Class B Common Stock shall be given the
     opportunity to receive the same form of consideration for their shares as
     is received by holders of Class A Common Stock and (b) holders of Class B
     Common Stock shall be entitled to receive the same amount of consideration
     per share as received by holders of Class A Common Stock.

     5.  Bylaws. The board of directors of the Corporation is authorized to
         ------
adopt, amend or repeal the bylaws of the Corporation, except as otherwise
specifically provided therein.

     6.  Elections of Directors. Elections of directors need not be by written
         ----------------------
ballot unless the bylaws of the Corporation shall so provide.

     7.  Right to Amend. The Corporation reserves the right to amend any
         --------------
provision contained in this Certificate as the same may from time to time be in
effect in the manner now or hereafter prescribed by law, and all rights
conferred on stockholders or others hereunder are subject to such reservation.

     8.  Limitation on Liability. The directors of the Corporation shall be
         -----------------------
entitled to the benefits of all limitations on the liability of directors
generally that are now or hereafter become available under the General
Corporation Law of Delaware. Without limiting the generality of the foregoing,
no director of the Corporation shall be liable to the Corporation or its
stockholders for monetary damages for breach of fiduciary duty as a director,
except for liability (i) for any breach of the director's duty of loyalty to the
Corporation or its stockholders, (ii) for acts or omissions not in good faith or
which involve intentional misconduct or a knowing violation of law, (iii) under
Section 174 of the Delaware General Corporation Law, or (iv) for any transaction
from which the director derived an improper personal benefit. Any repeal or
modification of this Section 8 shall be prospective only, and shall not affect,
to the detriment of any director, any limitation on the personal liability of a
director of the Corporation existing at the time of such repeal or modification.

                          ANNEX A IS ATTACHED HERETO.

                                       13
<PAGE>
 
                                                                         ANNEX A
                                                                         -------

THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT"), OR THE SECURITIES LAWS OF ANY STATE AND MAY NOT
BE TRANSFERRED WITHOUT REGISTRATION UNDER THE SECURITIES ACT OR ANY APPLICABLE
STATE SECURITIES LAWS OR AN OPINION OF COUNSEL, SATISFACTORY TO THE COMPANY,
THAT SUCH REGISTRATION IS NOT REQUIRED.

THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE ALSO SUBJECT TO THE TERMS AND
CONDITIONS OF A SECURITIES PURCHASE AND HOLDERS AGREEMENT BY AND AMONG THE
COMPANY AND THE HOLDERS SPECIFIED THEREIN, A COPY OF WHICH AGREEMENT IS ON FILE
AT THE PRINCIPAL OFFICE OF THE COMPANY. THE SALE, TRANSFER OR OTHER DISPOSITION
OF THE SECURITIES IS SUBJECT TO THE TERMS OF SUCH AGREEMENT AND THE SECURITIES
ARE TRANSFERABLE ONLY UPON PROOF OF COMPLIANCE THEREWITH.


No. ____


                    PAYMENTS UNDER THIS NOTE ARE SUBJECT TO
                THE SUBORDINATION PROVISIONS OF SECTION 7 HEREOF


                     GREAT LAKES DREDGE & DOCK CORPORATION
                     -------------------------------------


          _____% JUNIOR SUBORDINATED DEBENTURES DUE SEPTEMBER 30, 2009


     GREAT LAKES DREDGE & DOCK CORPORATION, a Delaware corporation (the
"Corporation", which term includes any successor corporation), for value
received, hereby promises to pay to _______________, a _______________, or its
successors or permitted assigns ("Holder"), the principal sum of _______________
on September 30, 2009, and to pay interest on the unpaid balance of the
principal amount of this Note at the rate of _____% per annum.  This Note will
accrue interest annually for the periods ending September 30 of each calendar
year commencing ________, ______ (each date of payment being an "Interest
Payment Date").  Interest on this Note will accrue from the most recent date to
which interest has been paid or accrued as provided in the preceding sentence
or, if no interest has been paid, from the issuance date hereof.  Interest will
be computed on the basis of a 365-day year for the actual days elapsed.  This
Note may be prepaid at any time in whole or in part without premium, penalty or
discount.  All permitted prepayments in respect of this Note shall be applied
first to accrued interest on the principal amount prepaid which interest has not
been added to the principal amount, and then to principal outstanding hereunder.
<PAGE>
 
     This Note shall be binding upon the successors and assigns of the
Corporation and shall inure to the benefit of the successors and permitted
assigns of the Holder.  The Holder may assign, transfer or dispose of its rights
with respect to this Note only upon registration of this Note under the
Securities Act, and any applicable state securities laws, or pursuant to an
exemption from such registration.

     1.   Method of Payment
          -----------------

          The Holder shall note any payment of principal on the Note, but the
obligation of the Corporation shall be reduced by such payment notwithstanding
any failure by Holder to note such payment.  The Corporation will pay principal
and interest in money of the United States of America that at the time of
payment is legal tender for payment of public and private debts (payment may be
made by check payable in such money).  All interest due on any Interest Payment
Date prior to the Maturity Date shall be deemed to be paid by such amount being
added to the outstanding principal amount on the Interest Payment Date therefor
and shall accrue interest as a portion of the principal amount of this Note from
such Interest Payment Date to the maximum extent permitted by law.

     2.   Maturity Date
          -------------

          This Note shall be repaid in full on September 30, 2009  (the
"Maturity Date")/1/.

     3.   Defined Terms
          -------------

          (a)   "Acceleration Notice" shall have the meaning set forth in 
Section 8(b).

          (b)   "Agent" shall have the meaning set forth in Section 7(a).

          (c)   "Bank Debt" shall have the meaning set forth in Section 7(a).

          (d)   "Bankruptcy Law" shall mean Title 11, U.S. Code or any similar
federal or state law for the relief of debtors.

          (e)   "Bonding Agreement" shall mean the Amended and Restated
Underwriting and Continuing Indemnity Agreement among the sureties party
thereto, the Corporation and certain of the Corporation's Subsidiaries,
including any related notes, guarantees, collateral documents, instruments and
agreements executed in connection therewith, as amended, restated, modified,
renewed, refunded, replaced or refinanced from time to time.

- --------------------------
/1/  The Board of Directors in its discretion shall have the power to set the
Maturity Date on or after September 30, 2009, but in no event later than
September 30, 2018.

                                      -2-
<PAGE>
 
          (f)   "Capital Stock" shall mean (i) in the case of a corporation,
corporate stock, (ii) in the case of an association or business entity, any and
all shares, interests, participations, rights or other equivalents (however
designated) of corporate stock, (iii) in the case of a partnership or limited
liability company, partnership or membership interests (whether general or
limited) and (iv) any other interest or participation that confers on a Person
the right to receive a share of the profits and losses of, or distributions of
assets of, the issuing Person.

          (g)   "Change in Control" shall have the meaning set forth in 
Section 4(b).

          (h)   "Citicorp" shall mean Citicorp, a Delaware corporation, or any
successor thereto by merger or consolidation.

          (i)   "Continuing Director" shall have the meaning set forth in
Section 4(b).

          (j)   "Corporation" shall have the meaning set forth in the first
paragraph of this Note.

          (k)   "Credit Agreement" shall have the meaning set forth in 
Section 7(b).

          (l)   "Custodian" means any receiver, trustee, assignee, liquidator,
sequestrator or similar official under any Bankruptcy Law or in connection with
any insolvency proceeding.

          (m)   "CVC" means Citicorp Venture Capital Ltd., a New York
corporation, or any successor thereto by merger or consolidation.

          (n)   "Equity Swap" shall have the meaning set forth in Section 5(g).

          (o)   "Event of Default" shall have the meaning set forth in 
Section 8(a).

          (p)   "Exchange Act" shall mean the Securities Exchange Act of 1934,
as amended.

          (q)   "GLI" shall mean Great Lakes International, Inc., a Delaware
corporation and wholly-owned subsidiary of the Corporation.

          (r)   "Great Lakes" shall mean Great Lakes Dredge & Dock Company, a
New Jersey corporation and wholly-owned subsidiary of GLI.

          (s)   "Holder" shall have the meaning set forth in the first paragraph
of this Note and, for purposes of Section 7, as set forth in Section 7.

          (t)   "Indebtedness" shall have the meaning set forth in Section 7(a).

                                      -3-
<PAGE>
 
          (u)   "Indenture" shall have the meaning set forth in Section 7(a).

          (v)   "Insolvency Proceeding" shall have the meaning set forth in
Section 7(j).

          (w)   "Interest Payment Date" shall have the meaning set forth in the
first paragraph of this Note.

          (x)   "Junior Indebtedness" shall have the meaning set forth in
Section 5(g)(iv).

          (y)   "Lenders" shall have the meaning set forth in Section 7(a).

          (z)   "Loan Parties" shall have the meaning set forth in Section 7(a).

          (aa)  "Majority Holders" shall have the meaning set forth in 
Section 8(b).

          (bb)  "Maturity Date" shall have the meaning set forth in Section 2.

          (cc)  "Non-payment Default" shall have the meaning set forth in
Section 7(a).

          (dd)  "Payment Blockage Period" shall have the meaning set forth in
Section 7(c)(iii).

          (ee)  "Payment Default" shall have the meaning set forth in 
Section 7(a).

          (ff)  "Person" shall mean any individual, partnership, corporation,
trust or unincorporated organization or a government or agency or political
subdivision thereof.

          (gg)  "Post-Petition Interest" shall have the meaning set forth in
Section 5(a).

          (hh)  "Principal" shall have the meaning set forth in Section 4(b).

          (ii)  "Principal Securities" shall have the meaning set forth in
Section 4(d).

          (jj)  "QIB" shall have the meaning set forth in Section 4(c).

          (kk)  "Redemption Price" shall have the meaning set forth in 
Section 4(a).

          (ll)  "Related Party" shall have the meaning set forth in 
Section 4(b).

                                      -4-
<PAGE>
 
          (mm)  "Representative" shall mean (i) the Agent for so long as the
Bank Debt is outstanding, (ii) at such time as the Bank Debt is no longer
outstanding, the sureties under the Bonding Agreement, for so long as
obligations of the Corporation are outstanding under such agreement, (iii) at
such time as obligations under the Bonding Agreement are no longer outstanding,
the Trustee, for so long as the Senior Subordinated Notes are outstanding, and
(iv) at such time as the Bank Debt, obligations under the Bonding Agreement and
the Senior Subordinated Notes are no longer outstanding, the representative
selected by holders of 50% or more of the Senior Debt of the applicable Senior
Creditor.

          (nn)  "Sale" shall have the meaning set forth in Section 4(d).

          (oo)  "SEC" shall mean the Securities and Exchange Commission.

          (pp)  "Securities Act" shall mean the Securities Act of 1933, as
amended.

          (qq)  "Senior Creditors" shall have the meaning set forth in 
Section 7(a).

          (rr)  "Senior Debt" shall have the meaning set forth in Section 7(a).

          (ss)  "Senior Default" shall have the meaning set forth in 
Section 7(a).

          (tt)  "Senior Loan Documents" shall have the meaning set forth in
Section 7(a).

          (uu)  "Senior Subordinated Notes" shall have the meaning set forth in
Section 7(a).

          (vv)  "Series A Preferred" shall mean the Corporation's 12% Series A
Cumulative Compounding Preferred Stock.

          (ww)  "Significant Subsidiary" shall have the meaning set forth in
Section 7(a).

          (xx)  "Stockholders Agreement" shall mean the Securities Purchase and
Holders Agreement dated as of August __, 1998, by and among the Corporation,
Vectura, and Management Investors.

          (yy)  "Subordinated Debt" shall have the meaning set forth in 
Section 7(a).

          (zz)  "Subsidiary" shall have the meaning set forth in Section 7(a).

          (aaa) "Subsidiary Guarantor" shall have the meaning given such term in
the Indenture.

                                      -5-
<PAGE>
 
          (bbb) "Transfer" shall have the meaning set forth in Section 10.

          (ccc) "Trustee" shall have the meaning set forth in Section 7(a).

          (ddd) "Vectura" shall mean Vectura Holdings, LLC, a Delaware limited
liability company.

          (eee) "Voting Stock" of any Person as of any date means the Capital
Stock of such Person that is at the time entitled to vote in the election of the
Board of Directors of such Person.

          (fff) "Wholly Owned Restricted Subsidiary" shall have the meaning
defined in the Indenture.

          (ggg) "399" shall mean 399 Venture Partners Inc. or its successors and
assigns.

     4.   Redemption
          ----------

          (a)   Optional Redemption.  The Corporation may, at any time and from
                -------------------                                            
time to time, redeem this Note, in whole or in part, at a redemption price equal
to the principal amount being redeemed plus accrued and unpaid interest, if any,
to the date of redemption (the "Redemption Price").

          (b)   Change in Control.  Upon the occurrence of a Change in Control,
                -----------------                                              
the Corporation shall, upon the expiration of any offer to purchase or repayment
or redemption of any Senior Debt required as a result of such Change in Control,
redeem this Note in full at the Redemption Price.  For purposes of this 
Section 4, the term "Change in Control" shall mean the occurrence of any of the
following: (i) the sale, lease, transfer, conveyance or other disposition (other
than by way of merger or consolidation), in one or a series of related
transactions, of all or substantially all of the assets of the Corporation and
its Subsidiaries (determined on a consolidated basis), in each case, to any
"person" (as such term is used in Section 13(d)(3) of the Exchange Act) other
than the Corporation or a Wholly Owned Restricted Subsidiary or any Principal or
a Related Party of a Principal, (ii) the adoption of a plan relating to the
liquidation or dissolution of the Corporation (other than a merger,
consolidation or sale of assets), (iii) the consummation of any transaction
(including, without limitation, any merger or consolidation) the result of which
is that any "person" (as defined above), other than one or more Principals or
their Related Parties, becomes the "beneficial owner" (as such term is defined
in Rule 13d-3 and Rule 13d-5 under the Exchange Act, except that a person shall
be deemed to have "beneficial ownership" of all securities that such person has
the right to acquire, whether such right is currently exercisable or is
exercisable only upon the occurrence of a subsequent condition), directly or
indirectly, of more than 50% of the Voting Stock of the Corporation (measured by
voting power rather than number of shares) and the Principals do not
beneficially own as much or more of the Voting Stock of the Corporation
(measured by voting power rather than by number of shares) than such person or
(iv) the first day on which a majority of the members of the Board of Directors
of the Corporation are 

                                      -6-
<PAGE>
 
not Continuing Directors. "Continuing Directors" means, as of any date of
determination, any member of the Board of Directors of the Corporation who (i)
was a member of such Board of Directors on the date of the Indenture or (ii) was
nominated for election or elected to such Board of Directors with the approval
of a majority of the Continuing Directors who were members of such Board at the
time of such nomination or election or was designated by a Principal or a
Related Party of a Principal. "Principals" means (i) CVC and the Management
Investors and (ii) any Related Party of a Person referred to in clause (i).
"Related Party" means (a) with respect to CVC (i) Citicorp, any direct or
indirect wholly owned subsidiary of Citicorp, and any officer, director or
employee of CVC, Citicorp or any wholly owned subsidiary of Citicorp, (ii) any
spouse or lineal descendant (including by adoption and stepchildren) of the
officers, directors and employees referred to in clause (a) (i) above, (iii) any
trust, corporation or partnership 100%-in-interest of the beneficiaries,
stockholders or partners of which consists of one or more of the persons
described in clause (a) (i) or (ii) above or (iv) Vectura, so long as CVC or any
of its Related Parties described in (i), (ii) or (iii) above holds at least 50%
of the Great Lakes membership interests in Vectura; and (b) with respect to any
officer or employee of the Corporation or a Subsidiary of the Corporation (i)
any spouse or lineal descendant (including by adoption and stepchildren) of such
officer or employee and (ii) any trust, corporation or partnership 100%-in-
interest of the beneficiaries, stockholders or partners of which consists of
such officer or employee, any of the persons described in clause (b) (i) above
or any combination thereof.

          (c)   Restricted Payments.  The Corporation shall redeem this Note in
                -------------------                                            
full to the extent then outstanding immediately upon any violation of 
Section 5(g).

          (d)   Limitations on Redemption Obligations.  Anything in this 
                -------------------------------------
Section 4 to the contrary notwithstanding, the Corporation shall not be
obligated to redeem all or any portion of the Note to the extent the Corporation
is prohibited from doing so by the terms of any Senior Debt outstanding at the
time of the occurrence of the event giving rise to such requirement to redeem.

          (e)   Interest on Securities Called for Redemption.  On  and after the
                --------------------------------------------                    
redemption date, interest will cease to accrue on the Note or portion thereof
called for redemption.

     5.   Covenants; Representations
          --------------------------

          (a)   Payment of Note.  The Corporation shall pay the principal of and
                ---------------                                                 
interest on this Note on the dates and in the manner provided in this Note.  The
Corporation shall pay interest (including post-petition interest ("Post Petition
Interest") in any proceeding under any Bankruptcy Law at the relevant
contractual rate, whether or not such interest is an allowed claim enforceable
against the debtor in a bankruptcy case under Title 11 of the U.S. Code) on
overdue installments of principal and interest on this Note at the applicable
rate set forth above plus 2%.

          (b)   SEC Reports.  The Corporation shall deliver to the Holder 
                -----------
promptly (and in any event within 5 days after it files them with the SEC),
copies of the annual reports, quarterly reports

                                      -7-
<PAGE>
 
and other periodic reports which the Corporation may be required to file with
the SEC pursuant to Section 13, 14 or 15(d) of the Exchange Act.

                 To the extent that the Corporation is required to prepare and
deliver any periodic reports to the holders of Senior Debt or to 399 or Vectura,
the Corporation shall deliver copies of such reports to the Holder, at the same
time the Corporation is required to deliver such reports to the holders of the
Senior Debt or to 399 or Vectura, as applicable. The Corporation shall, upon
reasonable notice, provide officers, employees and representatives of Holder and
the proposed transferees with reasonable access to the Corporation's premises,
properties, books, records and personnel as may reasonably be requested in
connection with a potential transfer of the Note or any portion thereof.

          (c)    Preservation of Corporate Existence; etc.  Subject to Section
                 ----------------------------------------
10, the Corporation will do or cause to be done all things necessary to preserve
and keep in full force and effect the corporate existence and the material
rights (charter and statutory) and franchises of the Corporation and of GLI and
Great Lakes; provided, however, that the Corporation shall not be required to
preserve or cause to be preserved any such material right or franchise if the
board of directors of the Corporation shall determine that the preservation
thereof is no longer desirable in the conduct of the business of the Corporation
and that the loss thereof is not, and will not be, adverse in any material
respect to the Holder.

          (d)    Payment of Taxes, Assessment, Charges and Claims. The
                 ------------------------------------------------
Corporation will and will cause the Subsidiaries to duly pay or discharge or
cause to be paid or discharged the following before they shall become
delinquent: (i) all material taxes, assessments and governmental charges levied
or imposed upon the Corporation or any of the Subsidiaries or upon the income,
profit or property of the Corporation or any of the Subsidiaries, and (ii) all
material lawful claims for labor, materials and supplies which, if unpaid, might
by law become a material lien upon the property of the Corporation or any of the
Subsidiaries; provided, however, that the Corporation or any of the Subsidiaries
              --------  -------
shall not be required to pay or discharge or cause to be paid or discharged (but
shall make adequate provision for) any such tax, assessment, charge or claim
whose amount, applicability or validity is being contested in good faith by
appropriate proceedings and for which adequate provision has been made.

          (e)    Waiver of Stay, Extension or Usury Laws.  The Corporation
                 ---------------------------------------                  
covenants (to the extent that it may lawfully do so) that it shall not at any
time insist upon, or plead, or in any manner whatsoever claim, and shall resist
any and all efforts to be compelled to take the benefit or advantage of, any
stay or extension law or any usury law or other law which would prohibit or
forgive the Corporation from paying all or any portion of the principal of
and/or interest on this Note as contemplated herein, wherever enacted, now or at
any time hereafter in force, or which may affect the covenants or the
performance of this Note; and (to the extent that it may lawfully do so) the
Corporation hereby expressly waives all benefit or advantage of any such law and
covenants that it

                                      -8-
<PAGE>
 
shall not hinder, delay or impede the execution of any power herein granted to
the Holder but shall suffer and permit the execution of every such power as
though no such law had been enacted.

          (f)    Compliance with Laws.  The Corporation will, and will cause
                 --------------------    
the Subsidiaries to, comply in all material respects with all applicable
statutes, regulations, orders and restrictions of the United States, any state,
municipality or other governmental division thereof, and agencies and
instrumentalities of the foregoing, in respect of the conduct of its and their
businesses and the ownership of its and their properties (including, without
limitation, applicable statutes, regulations, orders and restrictions relating
to equal employment opportunities and environmental standards and controls),
except such as are being contested in good faith.

          (g)    Limitation on Restricted Payments.
                 --------------------------------- 

                 (i)     The Corporation (A) shall not effect the declaration,
payment or setting apart for payment of any dividend on any part of the
Corporation's capital stock or any cash interest payment on any Junior
Indebtedness or effect or make any payment on account of or set apart for
payment money for a sinking or other similar fund for, the purchase, prepayment,
redemption or other retirement of, any of the Corporation's capital stock (or
any rights, warrants or options to purchase or acquire any such capital stock)
or Junior Indebtedness, or make any distribution of any nature whatsoever in
respect of any thereof, either directly or indirectly, and whether in cash, or
other obligations of the Corporation or other property (except dividends or
distributions payable solely in shares, rights, warrants or options of capital
stock and except dividends or distributions payable solely to the Corporation or
its wholly-owned Subsidiaries), (B) shall not make any payment of cash interest
on Indebtedness that is pari passu with this Note at any time when the payment
                        ---- -----
of cash interest on this Note is prohibited by the terms of any Senior Debt, (C)
shall not voluntarily prepay any Indebtedness that is pari passu with this Note,
                                                      ---- -----
(D) shall not permit a Subsidiary or any other corporation or other entity
directly or indirectly controlled by the Corporation to purchase, redeem or
otherwise acquire any of the Corporation's capital stock or Junior Indebtedness
or any Indebtedness that is pari passu with this Note and (E) shall not permit
any Subsidiary that is not a wholly-owned Subsidiary to make any payment or
distribution in respect of the capital stock of such Subsidiary that the
Corporation would be prohibited from making in respect of the capital stock of
the Corporation. The provisions of this Section 5(g) shall not prohibit (x) the
repurchase of securities of the Corporation from employees, former employees,
directors or former directors of the Corporation or any Subsidiary (or permitted
transferees of such individuals) pursuant to the terms of Article VII of the
Stockholders Agreement; provided, further, however, that the aggregate amount of
such repurchases shall not exceed the sum of (1) $10 million and (2) the
aggregate amount of cash received by the Corporation after the date hereof from
the sale of such securities to, or the exercise of options to purchase such
securities by, employees or directors of the Corporation or any Subsidiary, (y)
the exchange of the Series A Preferred for Junior Indebtedness pursuant to the
terms thereof, or (z) the retirement, redemption or exchange of Junior
Indebtedness or Series A Preferred with or for shares of capital stock of the
Corporation (an "Equity Swap").

                                      -9-
<PAGE>
 
          (ii)   The Corporation will not permit any Subsidiary to effect the
declaration, payment or setting apart for payment of any dividend on any part of
such Subsidiary's capital stock (other than dividends or distributions in such
Subsidiary's capital stock) except for payments of any dividend to the
Corporation or a wholly-owned Subsidiary.

          (iii)  None of the Corporation's Junior Indebtedness shall provide for
the mandatory payment of principal by way of redemption, sinking fund or
otherwise (including, without limitation, at the option of the holder thereof)
and the Corporation will make no optional payment with respect thereto, prior to
the payment of all principal of and interest on this Note (including accrued but
unpaid interest), except that nothing herein shall prohibit any Equity Swap.

          (iv)   "Junior Indebtedness" means any Indebtedness of the Corporation
whether outstanding on the date hereof or incurred thereafter, that is
subordinated in right of payment to this Note either by its terms or by
operation of law.

      (h) Limitation on Payment Restrictions.
          ---------------------------------- 

       Except as set forth herein, the Corporation will not, and will not permit
any of the Subsidiaries to, directly or indirectly, create or otherwise cause or
suffer to exist or become effective any encumbrance or restriction (other than
this Note) on the ability of any Subsidiary to (i) pay dividends or make any
other distribution on its capital stock or any other interests or participation
in, or measured by, its profits, owned by the Corporation or any Subsidiary of
the Corporation, or pay any Indebtedness owed to, the Corporation or a
Subsidiary of the Corporation, (ii) make loans or advances to the Corporation or
(iii) transfer any of its properties or assets to the Corporation, except for
such encumbrances or restrictions existing under or by reason of (A) applicable
law, (B) Senior Debt or (C) Indebtedness existing on the date hereof.

     6.   Due Authorization, etc.
          ---------------------- 

          The Corporation hereby represents to the Holder that (i) the
Corporation is a corporation duly organized, validly existing and in good
standing under the laws of the State of Delaware, (ii) the Corporation has all
requisite corporate power and corporate authority to execute and deliver this
Note and to carry out the terms hereof, (iii) the Corporation has duly
authorized the execution, delivery and performance of this Note and (iv) the
execution, delivery and performance of this Note do not (a) violate any
provision of the certificate of incorporation or by-laws of the Corporation, or
(b) violate any statute, rule or regulation of any governmental authority to
which the Corporation is subject. This Note represents the valid and binding
obligation of the Corporation, enforceable against the Corporation in accordance
with its terms.

     7.   Subordination
          -------------

                                     -10-
<PAGE>
 
          (a)    Definitions.  The following terms have the following meanings:
                 -----------                                                   

                 "Agent" means Bank of America National Trust and Savings
                  -----
Association, as administrative agent for the Lenders party to the Credit
Agreement, any successor agent and any agent for the Lenders with respect to any
amendment, extension, supplement, increase, renewal, refunding, replacement,
refinancing (including successive refinancings) or other modification of the
Bank Debt. If no such agent exists, "Agent" shall mean the holders of a majority
of the outstanding Bank Debt.

                 "Bank Debt" means all obligations of the Corporation (and the
                  ---------                                                   
Subsidiary Guarantors thereunder) now or hereafter existing (a) under the Credit
Agreement as it may hereafter be amended, extended, supplemented, increased,
renewed, refunded, replaced, refinanced (including successive refinancings) or
otherwise modified from time to time, whether for principal, interest, premium,
reimbursement of amounts drawn under letters of credit issued pursuant to the
Credit Agreement, fees, expenses, indemnities or otherwise and (b) under any of
the Senior Loan Documents, as they may hereafter be amended, extended,
supplemented, increased, renewed, refunded, replaced, refinanced (including
successive refinancings) or otherwise modified from time to time.

                 "Credit Agreement" means the Credit Agreement dated as of
                  ----------------
August __, 1998 among the Corporation, as borrower, other loan parties thereto,
the banks party thereto, the Agent and BancAmerica Robertson Stephens, as lead
arranger, as such Agreement may hereafter be amended, extended, supplemented,
increased, renewed, refunded, replaced, refinanced (including successive
refinancings) or otherwise modified.

                 "Holder" as used in this Section 7 means a holder or owner of
                  ------                                                      
this Note and any other holder or owner of Subordinated Debt.

                 "Indebtedness" means, without duplication, with respect to any
                  ------------
person, (a) the principal of and premium (if any) in respect of all indebtedness
of such person for borrowed money, (b) the principal of and premium (if any) in
respect of all obligations of such person evidenced by notes, bonds, debentures
or other similar instruments, (c) all indebtedness created or arising under any
conditional sale or other title retention agreement with respect to property
acquired by such person (even though the rights and remedies of the seller or
lender under such agreement in the event of default are limited to repossession
or sale of such property), (d) all obligations of such person as lessee under
leases that have been or should be, in accordance with generally accepted
accounting principles, recorded as capital leases, (e) all obligations,
contingent or otherwise, of such person under acceptance, letter of credit or
similar facilities, (f) all indebtedness of the type referred to in clauses (a)
through (e) above guaranteed directly or indirectly in any manner by such
person, or in effect guaranteed directly or indirectly by such person through an
agreement (1) to pay or purchase such indebtedness or to advance or supply funds
for the payment or purchase of such indebtedness, (2) to purchase, sell or lease
(as lessee or lessor) property, or to purchase or sell services, primarily for
the purpose of enabling the

                                     -11-
<PAGE>
 
debtor to make payment of such indebtedness or to assure the holder of such
indebtedness against loss, (3) to supply funds to or in any other manner invest
in the debtor (including any agreement to pay for property or services
irrespective of whether such property is received or such services are rendered)
or (4) otherwise to assure a creditor against loss, and (i) all indebtedness of
the type referred to in clauses (a) through (e) above secured by (or for which
the holder of such Indebtedness has an existing right, contingent or otherwise,
to be secured by) any lien on property (including, without limitation, accounts
and contract rights) owned by such person, even though such person has not
assumed or become liable for the payment of such indebtedness, but excluding
trade and other accounts payable in the ordinary course of business in
accordance with customary trade terms and which are not overdue for more than 90
days, or as to which a dispute exists and adequate reserves in conformity with
generally accepted accounting principles have been established on the books of
such person.

                 "Indenture" means the Indenture dated August__, 1998 between
                  ---------
the Corporation and The Bank of New York, as trustee, with respect to the
Corporation's ___% Senior Subordinated Notes due 2008.

                 "Lenders" means the Lenders as defined in the Credit Agreement.
                  -------                                                       

                 "Loan Parties" shall mean the Corporation and any Subsidiary
                  ------------
which is an obligor under the Credit Agreement or the Senior Subordinated Notes.

                 "Non-payment Default" means any default or event of default
                  -------------------
(other than a Payment Default) under any agreement or instrument relating to
Senior Debt. For purposes of the immediately preceding sentence, an "event of
default" shall exist when as a result thereof the holders of the pertinent
Senior Debt are then permitted (whether or not with the requirement that notice
be given) to cause such Senior Debt to become due prior to its scheduled
maturity.

                 "Payment Default" means any default in the payment of principal
                  ---------------
of, premium, if any, interest on, or other amounts payable on, or in connection
with, Senior Debt, irrespective of whether such default in payment results from
a failure to pay any amount when originally scheduled to be paid or upon
acceleration or otherwise.

                 "Senior Creditors" means (i) the Lenders and the Agent under
                  ----------------
the Senior Loan Documents until the Bank Debt (including all refinancings and
successive refinancings thereof) has been finally and indefeasibly paid in full,
(ii) thereafter, the sureties under the Bonding Agreement until obligations
under such agreement are no longer outstanding, (iii) thereafter, the holders of
the Senior Subordinated Notes until they have been finally and indefeasibly paid
in full and (iv) thereafter, the holders of other Senior Debt on a pro rata
basis.

                 "Senior Debt" means (a) all Indebtedness of the Corporation and
                  -----------
the Subsidiaries, including principal, premium, if any, and interest on such
Indebtedness, whether

                                     -12-
<PAGE>
 
outstanding on the date hereof or thereafter created, incurred or assumed,
except for Indebtedness which is expressly by its terms or the terms of the
instrument creating or evidencing such Indebtedness made equal in right of
payment with this Note or subordinate in right of payment to this Note, (b) all
other amounts due on or in connection with such Indebtedness, including all
charges, fees, indemnities, and expenses (including reasonable fees and expenses
of counsel), (c) all Post Petition Interest with respect to such Indebtedness,
(d) all amendments, extensions, supplements, increases, renewals, refundings,
replacements, refinancings, modifications and deferrals of the Indebtedness
referred to in clauses (a), (b) and (c) above, and shall include without
limiting the foregoing the Bank Debt, obligations under the Bonding Agreement,
the Senior Subordinated Notes and all guaranties thereof by the Corporation.
Notwithstanding the foregoing, Senior Debt shall not include (i) any
Indebtedness of the Corporation to any Subsidiary of the Corporation, (ii) any
Indebtedness of the Corporation which, by its terms or the terms of any
instrument creating or evidencing it (including the terms of any instrument
amending, extending, supplementing, renewing, increasing, refunding, replacing,
refinancing, modifying or deferring the same) is expressly made pari passu with
                                                                ---- -----
expressly subordinate in right of payment to this Note, (iii) Indebtedness to
any employee of the Corporation; (iv) any liability for taxes; (v) amounts
payable to trade creditors for goods and services provided in the ordinary
course of business; (vi) that portion of any Indebtedness which at the time of
incurrence, creation or assumption is incurred, created or assumed in violation
of the Indenture (as in effect on the date of issuance of the Senior
Subordinated Notes and irrespective of whether any Indebtedness is then
outstanding thereunder); or (vii) Indebtedness under the Senior Subordinated
Notes (or the terms of any instrument amending, extending, supplementing,
renewing, increasing, refunding, replacing, refinancing, modifying or deferring
the same) in excess of the principal amount outstanding on the date of original
issuance of the Senior Subordinated Notes plus any interest thereon or other
Indebtedness in respect thereof.

                 "Senior Default" means a Payment Default or a Non-payment
                  --------------                                          
Default.

                 "Senior Loan Documents" means all Loan Documents (as defined in
                  ---------------------                                         
the Credit Agreement).

                 "Senior Subordinated Notes" means all obligations of the
                  -------------------------
Corporation and the Subsidiary Guarantors, now or hereafter existing under the
Indenture as it may hereafter be amended, extended, supplemented, increased,
renewed, refunded, replaced, refinanced or otherwise modified from time to time,
whether for principal, interest, premium, fees, expenses, indemnities or
otherwise.

                 "Significant Subsidiary" means any Subsidiary of the
                  ----------------------
Corporation that would be a "significant subsidiary" as defined in Rule 1.02(v)
of Regulation S-X promulgated pursuant to the Securities Act.

                 "Subordinated Debt" means (a) all obligations of the
                  -----------------
Corporation now or hereafter existing under or with respect to this Note
(whether created directly or acquired by


                                     -13-
<PAGE>
 
assignment or otherwise), as it may hereafter be amended, extended, supplemented
or otherwise modified from time to time, whether for principal, interest
(including, without limitation, Post Petition Interest), fees, expenses,
indemnities, reimbursements, damages, liabilities or otherwise, (b) all
obligations of any of the Loan Parties in respect of (i) any Indebtedness (but
in no event constituting Bank Debt) incurred by any of the Loan Parties to
amend, extend, supplement, increase, renew, refund, replace, refinance or
otherwise modify, in whole or in part, the Subordinated Debt, including interest
and premium on any such Indebtedness, (ii) any loan or credit agreement entered
into by any of the Loan Parties in connection with any such Indebtedness, as
such agreement may be amended, extended, supplemented or otherwise modified from
time to time, and (iii) all other amounts payable in respect of any such
Indebtedness or agreement, including, without limitation, amounts payable (A) in
respect of any indemnity and (B) in respect of any breach of a representation or
a warranty.

          "Subsidiary" means any corporation more than 50% of the outstanding
           ----------                                                        
voting power of the voting stock of which is owned or controlled, directly or
indirectly, by the Corporation.

          "Trustee" means The Bank of New York, as trustee under the Indenture,
           -------                                                  
or any successor thereto

     (b)  Subordinated Debt Subordinated to Senior Debt. The Corporation, for
          ---------------------------------------------                   
itself and its successors, and each Holder, by its acceptance thereof, agrees
that the Subordinated Debt is and shall be subordinated in right of payment, to
the extent and in the manner provided in this Section 7, to the prior payment in
full of all Senior Debt. For the purposes of this Note, Senior Debt shall be
deemed not to have been paid in full until the holders or owners of the Senior
Debt shall have received payment of all Senior Debt in cash and as long as any
lender shall have any obligation under the Senior Loan Documents, the Indenture
or other agreement or instrument evidencing any obligations under any Senior
Debt. This Section 7 shall constitute a continuing offer to all persons who, in
reliance upon such provisions, become holders of, or continue to hold, Senior
Debt, and such provisions are made for the benefit of the holders of Senior
Debt, and such holders are made obligees hereunder and any one or more of them
may enforce such provisions.

     (c)  No Payment on Subordinated Debt in Certain Circumstances.
          -------------------------------------------------------- 

          (i)   Upon the maturity of all or any part of any Senior Debt by lapse
of time, acceleration (unless waived in writing) or otherwise, all Senior Debt
then due shall first be paid in full, or such payment duly provided for, in cash
or cash equivalents in a manner satisfactory to the holders of such Senior Debt,
before any payment is made on account of the Subordinated Debt, and until the
Senior Debt is paid in full, any distribution to which the Holder would be
entitled but for this Section 7 shall be made to holders of Senior Debt as their
interests may appear.

          (ii)  In the event that any Payment Default shall have occurred and be
continuing, unless and until such default shall have been cured or waived in
writing, then no payment 

                                     -14-
<PAGE>
 
(including any payment which may be payable by reason of the payment of any
other indebtedness of the Corporation being subordinated to payment of the
Subordinated Debt) shall be made by or on behalf of the Corporation for or on
account of any Subordinated Debt, and the Holder shall not take or receive from
the Corporation or any Subsidiary, directly or indirectly, in cash or other
property, or by set-off or in any other manner, including, without limitation,
from or by way of collateral, payment of all or any of the Subordinated Debt.
The Holder shall immediately deliver to the Representative any monies,
securities or other property paid in violation of the preceding sentence and
received by the Holder or its equivalent in cash, with proper endorsement or
assignment if necessary, and prior to such delivery shall hold in trust, such
monies, securities or other properties solely as trustee for and for the benefit
of the Senior Creditors as set forth in this sentence.

          (iii) Upon written notice from the Representative to the Corporation
(which shall give prompt notice to the Holder) of a Non-payment Default and if
such Non-payment Default shall not have been cured or waived in writing, no
payment (including any payment which may be payable by reason of the payment of
any other Indebtedness of the Corporation being subordinated to payment of the
Subordinated Debt) shall be made by or on behalf of the Corporation for or on
account of any Subordinated Debt, and the Holder shall not take or receive from
the Corporation, directly or indirectly, in cash or other property or by set-off
or in any other manner, including, without limitation, from or by way of
collateral, payment of all or any of the Subordinated Debt, during the period
(the "Payment Blockage Period") commencing on the date of receipt by the
Corporation of such notice and ending (unless earlier terminated by notice from
the Representative to the Corporation (which shall give prompt notice to the
Holder), on the earlier of (A) the date when all Non-payment Defaults shall have
been cured or waived in writing, (B) the date an Event of Default occurs under
Section 8(a)(ii) (other than Section 8(a)(ii)(E)) or 8(a)(iii), and (C) the date
on which the Bank Debt or Senior Subordinated Notes are accelerated and declared
immediately due and payable.

          (iv)  Nothing contained in this Section 7 will limit the right of the
Holder to take any action to accelerate the maturity of the securities pursuant
to Section 8 or to pursue, subject to Section 8, any rights or remedies
hereunder; provided that so long as any Senior Debt remains outstanding the
           --------                                                        
Holder shall take no such action during the period (the "Remedies Blockage
Period") commencing upon any Event of Default hereunder until the earlier of (A)
the date when all Events of Default hereunder shall have been cured or waived in
writing, (B) the date an Event of Default occurs under Section 8(a)(ii) or
8(a)(iii), and (C) the date on which the Bank Debt, obligations under the
Bonding Agreement or Senior Subordinated Notes are accelerated and declared
immediately due and payable; provided, further, that in the event that any
                             --------  -------                            
Subordinated Debt is declared due and payable before its stated maturity, the
holders of all Senior Debt shall be entitled to receive final and indefeasible
payment in full of all amounts due or to become due (whether or not accelerated)
on or in respect of all Senior Debt before the Holder is entitled to receive any
payment (including any payment which may be payable by reason of the payment of
any other indebtedness of the Corporation being subordinated to the payment of
the Subordinated Debt) by the Corporation on account of the Subordinated Debt.
The Holder shall immediately deliver to the Representative any monies,
securities or other property

                                     -15-
<PAGE>
 
received by the Holder or its equivalent in cash, with proper endorsement or
assignment if necessary, and prior to such delivery shall hold in trust, such
monies, securities or other properties solely as trustee for and for the benefit
of the Senior Creditors as set forth in this sentence.

          (v)    Nothing contained in this Section 7 shall prevent interest
from accruing to this Note as provided above until this Note is paid in full.

     (d)  Subordinated Debt Subordinated to Prior Payment of All Senior Debt
          ------------------------------------------------------------------
on Dissolution.  Upon any payment or distribution of all or any of the assets or
- --------------                                                                  
securities of the Corporation of any kind or character upon any dissolution,
winding up, liquidation, reorganization, arrangement, adjustment, protection,
relief or other similar case or proceeding under any federal or state bankruptcy
or similar law (whether voluntary or involuntary, in bankruptcy, insolvency,
receivership, arrangement, reorganization or relief proceedings or upon any
assignment for the benefit of creditors or any marshalling of the assets and
liabilities of the Corporation or otherwise):

          (i)    all Senior Debt shall first be entitled to be paid in full
before the Holder is entitled to receive any payment on account of the
Subordinated Debt; and

          (ii)   any payment or distribution in respect of the Subordinated Debt
to which the Holder would be entitled except for the provisions of this Section
7 (including any payment that may be payable by reason of any other Indebtedness
of the Corporation being subordinated to the payment of the Subordinated Debt),
shall be paid by the Corporation, the liquidating trustee or agent or other
person making such payment or distribution directly to the Agent (in the case of
the Bank Debt) or to the holders of the other Senior Debt or their
Representative or to the trustee under any indenture or other agreement (if any)
pursuant to which Senior Debt may have been issued, as the case may be, for
application to (in the case of cash), or as collateral (in the case of non-cash
property or securities) for, the payment or prepayment in full of all Senior
Debt remaining unpaid, after giving effect to any concurrent payment or
distribution (in the case of cash) to the holders of such Senior Debt.

     (e)  Holder to be Subrogated to Rights of Holders of Senior Debt.  Upon
          -----------------------------------------------------------       
final and indefeasible payment in full of all Senior Debt, the Holder shall be
subrogated to the rights of the holders of Senior Debt to receive payments or
distributions of assets of the Corporation applicable to the Senior Debt until
all Subordinated Debt shall be paid in full, and for the purpose of such
subrogation no such payments or distributions to the holders of Senior Debt by
or on behalf of the Corporation or by or on behalf of the Holder by virtue of
this Section 7 which otherwise would have been made to the Holder shall, as
among the Corporation, its creditors other than the holders of Senior Debt and
the Holder, be deemed to be payment by the Corporation to or on account of the
Senior Debt, it being understood that the provisions of this Section 7(e) are
and are intended solely for the purpose of defining the relative rights of the
Holder, on the one hand, and the holders of Senior Debt, on the other hand.

                                     -16-
<PAGE>
 
          If any payment or distribution to which the Holder would otherwise
have been entitled but for the provisions of this Section 7 shall have been
applied, pursuant to the provisions of this Section 7, to the payment of all
amounts payable under the Senior Debt, then and in such case, the Holder shall
be entitled to receive from the holders of such Senior Debt at the time
outstanding any payments or distributions received by such holders of Senior
Debt in excess of the amount sufficient to pay holders of Senior Debt all
amounts payable under or in respect of the Senior Debt in full unless the
holders of Senior Debt are otherwise directed by a court of competent
jurisdiction.

     (f)  Subordination Rights Not Impaired by Acts or Omissions of the
          -------------------------------------------------------------
Corporation or Holders of Senior Debt.  The Corporation agrees that it will not
- -------------------------------------                                          
make any payment of any Subordinated Debt, or take any other action, in
contravention of the provisions of this Section 7, and no right of any present
or future holders of any Senior Debt to enforce subordination as provided herein
shall at any time in any way be prejudiced or impaired by any act or failure to
act on the part of the Corporation or by any act or failure to act, in good
faith, by any such holder, or by any noncompliance by the Corporation with the
terms of this Note, regardless of any knowledge thereof which any such holder
may have or with which any such holder may be otherwise charged.  The holders of
Senior Debt may amend, extend, supplement, increase, renew, refund, replace,
refinance, restructure or otherwise modify the terms of the Senior Debt or any
instrument or agreement evidencing or governing the same or any security
therefor and release, sell or exchange any security therefor and otherwise deal
freely with any Loan Party, all without affecting the liabilities and
obligations of the Corporation and the Holder hereunder.

     (g)  In Furtherance of Subordination.
          ------------------------------- 

          (i)   All payments or distributions upon or with respect to the
Subordinated Debt which are received by the Holder contrary to the provisions of
this Section 7 shall be received and held by such Holder, in trust for the
benefit of, shall be segregated from other funds and property held by such
Holder for and shall be paid immediately over and delivered to the
Representative of Senior Creditors in the same form as so received (with any
necessary endorsement), for application (in the case of cash) to, or as
collateral (in the case of non-cash property or securities) for, the payment or
prepayment in full of all Senior Debt of the Senior Creditors remaining unpaid,
after giving effect to any concurrent payment or distribution (in the case of
cash) to the holders of Senior Debt and shall be applied (A) first to the final
and indefeasible payment in full of all Bank Debt, (B) next to the final and
indefeasible payment in full of the Senior Subordinated Notes and (C) finally to
the payment of any other Senior Debt on a pro rata basis.

          (ii)  The Corporation shall give prompt written notice to the Holder
of any Senior Default under any Senior Debt or under any agreement pursuant to
which Senior Debt may have been issued or of any dissolution, winding up,
liquidation, reorganization or other event described in Section 7(d) relating to
the Corporation; provided that, except as set forth in Section 7(i),
                 --------                                                       

                                     -17-
<PAGE>
 
the failure to give any such notice shall in no way affect the obligations of
the Holder under, or the terms of subordination set forth in, this Section 7.

          (iii)  The Agent or the holders of Senior Debt (including the
Trustee), as the case may be, are hereby authorized to demand specific
performance of the provisions of this Section 7, whether or not the Corporation
shall have complied with any of the provisions hereof applicable to it, at any
time when the Corporation or the Holder, as the case may be, shall have failed
to comply with any of the provisions of this Section 7 applicable to it. The
Holder hereby irrevocably waives any defense based on the adequacy of a remedy
at law that might be asserted as a bar to such remedy of specific performance.
The Holder hereby acknowledges that the provisions of this Section 7 are
intended to be enforceable at all times, whether before or after the
commencement of a proceeding referred to in Section 7(d).

     (h)   Obligations of Corporation Unconditional. Nothing contained in this
           ----------------------------------------
Section 7 is intended to or shall impair, as between the Corporation and the
Holder, the obligations of the Corporation, which are absolute and
unconditional, to pay to the Holder the principal of, premium, if any, on and
interest on this Note as and when the same shall become due and payable in
accordance with its terms or is intended to or shall affect the relative rights
of the Holder and creditors of the Corporation other than the holders of the
Senior Debt, and, except as otherwise expressly provided herein, nothing
contained herein shall prevent the Holder from exercising all remedies otherwise
permitted by applicable law upon Default, subject to the rights, if any, under
this Section 7 of the holders of such Senior Debt in respect of cash, property,
security or securities of the Corporation received upon the exercise of any such
remedy. Nothing contained in this Section 7 or in this Note shall, except during
the pendency of any dissolution, winding-up, liquidation, reorganization,
recapitalization or readjustment of the Corporation, affect the obligation of
the Corporation to make, or prevent the Corporation from making, at any time
(except under the circumstances described in Section 7(c)) payment of principal
of or interest on this Note.

     The failure to make a payment on account of principal of, premium, if any,
on or interest on this Note by reason of any provision of this Section 7 shall
not be construed as preventing the occurrence of an Event of Default under
Section 8.

     Upon any payment or distribution of assets of the Corporation referred to
in this Section 7, the Holder shall be entitled to rely upon any unstayed,
final, nonappealable order or decree made by any court of competent jurisdiction
or upon any certificate of any agent or other person for the purpose of
ascertaining the persons entitled to participate in any distribution, the
holders of the Senior Debt and other Indebtedness of the Corporation, the amount
thereof or payable thereon, the amount or amounts paid or distributed thereon
and all other facts pertinent thereto or to this Section 7.

     (i)  Holder Entitled to Assume Payments Not Prohibited in Absence of
          ---------------------------------------------------------------
Notice.  The Holder shall not at any time be charged with the knowledge of the
- ------                                                                        
existence of any facts which 

                                     -18-
<PAGE>
 
would prohibit the making of any payment to such Holder, unless and until the
Holder shall have received written notice thereof from the Corporation or one or
more holders of Senior Debt or from the Agent or Representative therefor; and,
prior to the receipt of any such written notice (and absent actual notice to the
contrary on the part of the Holder), the Holder shall be entitled to assume
conclusively that no such facts exist. Nothing contained in this Section 7 shall
limit the right of the holders of Senior Debt to recover payments as
contemplated elsewhere in this Section 7. The Holder shall be entitled to rely
on the delivery to it of, and upon such delivery will be charged with knowledge
of the existence of, a written notice by a person representing himself or itself
to be a holder of such Senior Debt (or a trustee on behalf of, or other
representative of, such holder) to establish that such notice has been given by
a holder of such Senior Debt or a trustee on behalf of any such holder.

          (j)  Rights in Insolvency Proceedings. The Holder irrevocably
               --------------------------------                         
authorizes and empowers the Representative of the Senior Creditors in any
proceeding defined in Section 8(a) (ii) or (iii) (an "Insolvency Proceeding")
involving or relating to the Subordinated Debt to file a proof of claim on
behalf of the Holder with respect to the Subordinated Debt if the Holder fails
to file proof of its claims prior to 30 days before the expiration of the time
period during which such claims must be submitted to accept and receive any
payment or distribution which may be payable or deliverable at any time upon or
in respect of the Subordinated Debt in an amount not in excess of the Agent's
portion of the Senior Debt then outstanding and to take such other action as may
be reasonably necessary to effectuate the foregoing. The Holder shall provide to
the Agent all information and documents reasonably necessary to present claims
or seek enforcement as aforesaid. The Holder agrees that even though it shall
retain the right to vote its claims and otherwise act in any such Insolvency
Proceedings relative to the Corporation (including, without limitation, the
right to vote to accept or reject any plan of partial or complete liquidation,
reorganization, arrangement, composition or extension), the Holder shall not
take any action or vote in any way so as to contest (i) the validity or the
enforceability of the Credit Agreement, the Senior Loan Documents or the liens
and security interests to the extent granted to the Agent by the Corporation
with respect to the Bank Debt, (ii) the validity or enforceability of the
Indenture, (iii) the rights of the Lenders established in the Credit Agreement,
the Senior Loan Documents or any security documents with respect to such liens
and security interests, or (iv) the validity or enforceability of terms of
subordination set forth herein or any agreement or instrument to the extent
evidencing or relating to the Senior Debt. The holders of Senior Debt agree that
as a condition to Holder's obligations in this paragraph, while they shall
retain the right to vote the Senior Debt and otherwise act in any such
reorganization proceeding relative to the Corporation (including, without
limitation, the right to vote or accept or reject any plan of partial or
complete liquidation, reorganization, arrangement, composition or extension),
they shall not take any action or vote in any way so as to contest the
enforceability of this Note or any other agreement or instrument to the extent
evidencing or relating to the Subordinated Debt.

          (k)  Waiver of Consolidation.  Each holder of this Note agrees that it
               -----------------------                                          
will not at any time insist upon, plead, or in any manner whatsoever, seek the
entry of any order or judgment, or take the benefit or advantage of, any
substantive consolidation, piercing of the corporate veil or any other 

                                     -19-
<PAGE>
 
order or judgment that causes an effective combination of the assets and
liabilities of the Corporation and any other individual, corporation,
partnership or joint venture in any Insolvency Proceeding.

     (l)   Miscellaneous.
           ------------- 

           (i)   The Holder and the Corporation each will, at the Corporation's
expense and at any time and from time to time, promptly execute and deliver all
further instruments and documents, and take all further action that may be
reasonably necessary or desirable, or that the Agent or any Representative of
the Senior Creditors may reasonably request, in order to protect any right or
interest granted or purported to be granted by the provisions of this Section 7
or to enable the Agent to exercise and enforce its rights and remedies
hereunder.

           (ii)  All rights and interests under this Section 7 of the holders of
the Bank Debt, the Agent or the holders of the Senior Subordinated Notes and any
other holder of Senior Debt, and all agreements and obligations of the Holder
and the Corporation under this Section 7, shall remain in full force and effect
irrespective of:

                 (a) any lack of validity or enforceability of any Senior Loan
Document or any other agreement or instrument relating thereto or to any Senior
Debt;

                 (b) any amendment, extension, renewal, increase, supplement,
refunding, replacement, refinancing or other modification in the time, manner or
place of payment of, or in any other term of, all or any of the Bank Debt, the
Senior Subordinated Notes or any other Senior Debt, or any other amendment,
extension, renewal or waiver of or any consent to any departure from any Senior
Loan Document or any other agreement or instrument relating thereto or to any
other Senior Debt, including, without limitation, any increase in obligations
resulting from the extension of additional credit to any Loan Party or any of
its subsidiaries or otherwise (provided that nothing in this paragraph shall
operate to make any Indebtedness that would not otherwise qualify as Senior Debt
so qualify).

                 (c) any taking, exchange, release or non-perfection of any
other collateral, or any taking, release or amendment or waiver of or consent to
departure from any guaranty, for all or any of the Bank Debt, the Senior
Subordinated Notes or any other Senior Debt;

                 (d) any manner of application of collateral, or proceeds
thereof, to all or any of the Bank Debt or any other Senior Debt, or any manner
of sale or other disposition of any collateral for all or any of the Bank Debt
or any other Senior Debt, or any other assets of any Loan Party or any of its
subsidiaries;

                 (e) any change, restructuring or termination of the corporate
structure or existence of any Loan Party or any of its subsidiaries; or


                                     -20-
<PAGE>
 
                 (f) any other circumstance which might otherwise constitute a
defense available to, or a discharge of, any Loan Party or a subordinated
creditor.

          (iii)  The provisions of this Section 7 shall continue to be effective
or be reinstated, as the case may be, if at any time any payment of any Senior
Debt is rescinded or must otherwise be returned by the Agent, any holder of Bank
Debt, any  holder of the Senior Subordinated Notes or any other holder of Senior
Debt upon the insolvency, bankruptcy or reorganization of any Loan Party or
otherwise, all as though such payment had not been made.

          (iv)   The Holder and the Corporation each hereby waives (to the
extent each may lawfully do so) promptness, diligence, notice of acceptance and
any other notice with respect to any of the Senior Debt and this Section 7 and
any requirement that the Agent, any holder of Bank Debt or any other holder of
Senior Debt protect, secure, perfect or insure any security interest or lien or
any property subject thereto or exhaust any right or take any action against the
Corporation or any other person or entity or any collateral.

          (v)    No failure on the part of the Agent, any holder of Bank Debt,
any holder of the Senior Subordinated Notes or any other holder of Senior Debt
to exercise, and no delay in exercising, any right hereunder shall operate as a
waiver thereof; nor shall any single or partial exercise of any right hereunder
preclude any other or further exercise thereof or the exercise of any other
right. The remedies hereunder provided are cumulative and not exclusive of any
remedies provided by law.

          (vi)   The provisions of this Section 7 constitute a continuing
agreement and shall (A) remain in full force and effect until all Senior Debt
shall have been finally and indefeasibly paid in full, (B) be binding upon the
Holder and the Corporation and their successors and assigns, and (C) inure to
the benefit of and be enforceable by any holders of Bank Debt, the Agent, the
Trustee, any holder of the Senior Subordinated Notes, any other holder of Senior
Debt and their successors, transferees and assigns.

     8.   Events of Default
          -----------------

          (a)    An "Event of Default" occurs if:

                 (i)   the Corporation defaults in the payment of the principal
or interest of this Note when the same becomes due and payable at maturity, upon
acceleration, or otherwise, whether or not such payment shall be prohibited by
the provisions of Section 7;

                 (ii)  the Corporation or any Significant Subsidiary, pursuant
to or within the meaning of any Bankruptcy Law:


                                     -21-
<PAGE>
 
                       (A) commences a voluntary case or proceeding,

                       (B) consents to the entry of an order for relief against
                 it in an involuntary case or proceeding,

                       (C) consents to the appointment of a Custodian of it or
                 for all or substantially all of its property, or

                       (D) makes a general assignment for the benefit of its
                 creditors;

                 (iii) a court of competent jurisdiction enters an order or
decree under any Bankruptcy Law that:

                       (A) is for relief against the Corporation or any
                 Significant Subsidiary in an involuntary case or proceeding,

                       (B) appoints a Custodian of the Corporation or any
                 Significant Subsidiary or for all or substantially all of its
                 property, or

                       (C) orders the liquidation of the Corporation or any
                 Significant Subsidiary;

and in the case of (A) above the order or decree remains unstayed and in effect
for 60 days;

                 (iv)  the Corporation fails to observe or perform any material
covenant, condition or agreement required on its part to be observed or
performed pursuant to Section 5, such failure continues for a period of thirty
days after notice from Holder and notice of such failure shall have been given
to the Representative (which notice may be given by the Corporation or the
Holder); or

                 (v)   the Corporation fails to pay any Indebtedness of the
Corporation within any applicable grace period after final maturity or any such
Indebtedness is accelerated by the holders thereof because of a default and the
total amount of such Indebtedness unpaid or accelerated exceeds $10 million and
such failure continues for 10 days after notice.

          (b)    Acceleration. Subject to the provisions of Section 7, if an
                 ------------
Event of Default (other than an Event of Default with respect to the Corporation
specified in clause (a)(ii) or (iii) of Section 8) occurs and is continuing, the
Holders of 25% or more of the outstanding amount of the Corporation's _____%
Junior Subordinated Debentures due 2009, by written notice to the Corporation
(an "Acceleration Notice"), may declare the unpaid principal of and accrued
interest on this Note to be 

                                     -22-
<PAGE>
 
immediately due and payable. Upon such declaration, if there is at such time any
Senior Debt outstanding, the principal, premium, if any, and interest shall be
due and payable upon the first to occur of an acceleration under the Senior Loan
Documents or the Indenture or thirty days after receipt by the Agent (or any
Representative of which the holder of this Note has received notice if the Bank
Debt is not then outstanding) of such Acceleration Notice given hereunder and
there has been no cure by such 30th day. If an Event of Default specified in
clause (a)(ii) or (iii) of Section 8 occurs with respect to the Corporation, all
principal of and interest on this Note outstanding shall ipso facto become and
                                                         ---- -----
be immediately due and payable without any declaration or other act on the part
of the Holder. The Holders of 50% or more of the outstanding amount of the
Corporation's ____% Junior Subordinated Debentures due 2009 (the "Majority
Holders") by written notice to the Corporation may rescind an acceleration and
its consequences if (i) all existing Events of Default, other than the
nonpayment of principal of or interest on this Note which has become due solely
because of the acceleration, have been cured or waived and (ii) the rescission
would not conflict with any judgment or decree of a court of competent
jurisdiction. Any amounts received by Holder in connection with any action taken
pursuant to this Section 8(b) shall be subject to the provisions of Section 7.

          (c) Other Remedies.  Subject to the provisions of Section 7, if an
              --------------                                                
Event of Default occurs and is continuing, the Majority Holders may pursue any
available remedy by proceeding at law or in equity to collect the payment of
principal of or interest on this Note or to enforce the performance of any
provision of this Note.

          A delay or omission by the Holder in exercising any right or remedy
accruing upon an Event of Default shall not impair the right or remedy or
constitute a waiver of or acquiescence in the Event of Default.  No remedy is
exclusive of any other remedy.  All remedies are cumulative to the extent
permitted by law.

          (d) Waiver of Past Defaults.  Subject to Section 8(b), the Majority
              -----------------------                                        
Holders may waive an existing Default or Event of Default and its consequences.
Upon any such waiver, such Default shall cease to exist, and any Event of
Default arising therefrom shall be deemed to have been cured for every purpose
of this Note; but no such waiver shall extend to any subsequent or other Default
or impair any right consequent thereon.

     9.   Amendment and Waiver
          --------------------

          (a) Consent Required.  Any term, covenant, agreement or condition of
              ----------------                                                
this Note may, with the consent of the Corporation, be amended or compliance
therewith may be waived (either generally or in a particular instance and either
retroactively or prospectively), if the Corporation shall have obtained the
consent in writing of the Majority Holders; provided that without the written
consent of the holders of all of the Notes then outstanding, no such waiver,
modification, alteration or amendment shall be effective (i) which will change
the time of payment of the principal of or the interest on any Note or reduce
the principal amount thereof, or (ii) which will change the percentage of

                                     -23-
<PAGE>
 
holders of the Notes required to consent to any such amendment, alteration or
modification, or (iii) which will change any of the provisions of Section 8(b),
Section 8(c), Section 8(d) or this Section 9. This Note may not be amended
without the consent in writing of the Agent and the Trustee.

          For the purpose of determining whether holders of the requisite
principal amount of Notes have made or concurred in any waiver, consent,
approval, notice or other communication under this Note, Notes held in the name
of, or owned beneficially by, the Corporation or any Subsidiary shall not be
deemed outstanding.

          (b) Effect of Amendment or Waiver.  Any amendment or waiver shall
              -----------------------------                                
apply equally to all of the holders of the Notes and shall be binding upon them,
upon each future holder of any Note and upon the Corporation, whether or not
such Note shall have been marked to indicate such amendment or waiver.  No such
amendment or waiver shall extend to or affect any obligation not expressly
amended or waived or impair any right consequent thereon.

     10.  No Setoff.  The rights of the Holder to receive payment hereunder
          ---------                                                        
shall be absolute and not subject to any setoff or similar right.

     11.  When Corporation May Merge, etc.
          -------------------------------

          (a)    The Corporation shall not consolidate with or merge with or
into, or convey, transfer or lease, in one transaction or a series of
transaction, all or substantially all its assets to, any Person, unless:

          (i)    the resulting, surviving or transferee Person (the "Successor
          Company") shall be a Person organized and existing under the laws of
          the United States of America, any State thereof or the District of
          Columbia and the Successor Company (if not the Corporation) shall
          expressly assume, all the obligations of the Corporation hereunder;

          (ii)   immediately after giving effect to such transaction (and
          treating any Indebtedness which becomes an obligation of the Successor
          Company or any Subsidiary as a result of such transaction as having
          been incurred by the Successor Company or such Subsidiary at the time
          of such transaction), no Default shall have occurred and be
          continuing;

          (iii)  such transaction shall be permitted by the Indenture if any
          Indebtedness under the Indenture is then outstanding;

          (iv)   the Corporation shall have delivered to the Holder an officers'
          certificate and an opinion of counsel, each stating that such
          consolidation, merger or transfer and such supplemental indenture (if
          any) comply with this Note.

                                     -24-
<PAGE>
 
          The Successor Company shall be the successor to the Corporation and
shall succeed to, and be substituted for, and may exercise every right and power
of, the Corporation under this Note, but the predecessor Corporation in the case
of a conveyance, transfer or lease shall not be released from the obligation to
pay the principal of and interest on this Note.

          (b)  The Corporation shall not permit any Significant Subsidiary to
consolidate with or merge with or into, or convey, transfer or lease, in one
transaction or series of transaction, all or substantially all of its assets to
any Person unless:  (i) the resulting, surviving or transferee Person (if not
such Significant Subsidiary) shall be a Person organized and existing under the
laws of the jurisdiction under which such Significant Subsidiary was organized
or under the laws of the United States of America, or any State thereof or the
District of Columbia; (ii) immediately after giving effect to such transaction
or transactions on a pro forma basis (and treating any Indebtedness which
becomes an obligation of the resulting, surviving or transferee Person as a
result of such transaction as having been issued by such Person at the time of
such transaction), no Default shall have occurred and be continuing; and (iii)
the Corporation delivers to the Holder an officers' certificate and an opinion
of counsel, each stating that such consolidation, merger or transfer complies
with this Note.  The provisions of clauses (i) and (ii) above shall not apply to
any one or more transactions which constitute an Asset Disposition as defined in
the Indenture if the Corporation has complied with the applicable provisions of
Section [___] of the Indenture.

     12.  Denominations; Transfer and Exchange
          ------------------------------------

          When this Note is presented to the Corporation with a request to
register the transfer, the Corporation shall register a transfer as requested,
if the requirements for such transfer are met; provided, however, that if this
                                               --------  -------              
Note is presented or surrendered for registration of transfer or exchange it
shall be duly endorsed or be accompanied by a written instrument of transfer in
form satisfactory to the Corporation duly executed by the Holder or his attorney
duly authorized in writing. The Corporation may require payment of a sum
sufficient to cover any tax or other governmental charge that may be imposed in
relation thereto.

     13.  Replacement Note
          ----------------

          If a mutilated Note is surrendered to the Corporation or if the Holder
of this Note presents evidence to the reasonable satisfaction of the Corporation
that this Note has been lost, destroyed or wrongfully taken, the Corporation
shall issue a replacement Note of like tenor if the requirements of the
Corporation for such transactions are met.  An indemnity bond may be required
that is sufficient in the reasonable judgment of the Corporation to protect the
Corporation from any loss which it may suffer.  The Corporation may charge for
its expenses in replacing this Note.

     14.  No Recourse Against Others
          --------------------------

                                     -25-
<PAGE>
 
          No director, officer, employee or stockholder, as such, of the
Corporation shall have any liability for any obligations of the Corporation
under this Note or for any claim based on, in respect or by reason of, such
obligations or their creation.  The Holder by accepting this Note waives and
releases all such liability.  This waiver and release are part of the
consideration for the issue of this Note.

     15.  Notice
          ------

          All notices, requests, consents and demands shall be made in writing
and shall be given by registered or certified mail postage prepaid to the
following addresses: if to the Corporation, to it at Great Lakes Dredge & Dock
Corporation, 2122 York Road, Oak Brook, Illinois 60521, Attention: Bruce J.
Biemeck, Chief Financial Officer, with required copies to: 399 Venture Partners
Inc., 399 Park Avenue, Fourteenth Floor, New York, New York 10043, Attention:
Michael A. Delaney and Paul C. Schorr IV, Telecopy:  (212) 888-2940, to Dechert
Price & Rhoads, 4000 Bell Atlantic Tower, 1717 Arch Street, Philadelphia,
Pennsylvania 19103, Attention: G. Daniel O'Donnell, Telecopy: (215) 994-2222 or
to such other address as may be furnished in writing to the Holder; and if to
the Holder, to it at its address listed on the transfer books of the
Corporation.  Unless otherwise indicated herein, notices hereunder shall be
effective when delivered, if delivered personally, or, if sent by mail, when
sent.

          Any notices given by the Representative to Holder hereunder may be
made by Representative by delivery as set forth above to the address for Holder
set forth above or such other address of which Holder shall give notice to
Representative. Any notices given by the Corporation or Holder to Representative
hereunder may be made by delivery as set forth above to the following address or
such other address of which Representative shall give notice to the party
delivering such notice:                                             . 
                       _____________________________________________

     16.  Governing Law
          -------------

          This Note shall be deemed a contract under, and shall be governed and
construed in accordance with, the laws of the State of New York without giving
effect to principles of conflicts of laws.

     17.  Successors, etc.; Entire Agreement
          ----------------------------------

          This Note shall be binding upon and shall inure to the benefit of and
be enforceable by the respective successors and assigns of the Corporation and
the registered Holder thereof.


                                     -26-
<PAGE>
 
     18.  Headings
          --------

          The section headings of this Note are for convenience only and shall
not affect the meaning or interpretation of this Note or any provision hereof.


     IN WITNESS WHEREOF, the Corporation has caused this Note to be executed by
its duly authorized officer.

Dated:               , 
       ______________  ____

                                    GREAT LAKES DREDGE & DOCK 
                                    CORPORATION



                                    By: 
                                       ____________________________
                                                 President


                                     -27-

<PAGE>
 
                                                                    EXHIBIT 3.02
                                                                    ------------

                                     BYLAWS

                                       OF

                     GREAT LAKES DREDGE & DOCK CORPORATION

                                   ARTICLE I

                                  STOCKHOLDERS
                                  ------------

 
1.1  Meetings.
     --------

     1.1.1    Place. Meetings of the stockholders shall be held at such place as
              -----
may be designated by the board of directors.

     1.1.2    Annual Meeting. An annual meeting of the stockholders for the
              -------------- 
election of directors and for other business shall be held on such date and at
such time as may be fixed by the board of directors.

     1.1.3    Special Meetings. Special meetings of the stockholders may be
              ----------------
called at any time by the president, or the board of directors, or the holders
of a majority of the outstanding shares of stock of the Company entitled to vote
at the meeting.

     1.1.4    Quorum.  The presence, in person or by proxy, of the holders of a
              ------
majority of the outstanding shares of stock of the Company entitled to vote on a
particular matter shall constitute a quorum for the purpose of considering such
matter.

     1.1.5    Voting Rights. Except as otherwise provided herein, in the
              ------------- 
certificate of incorporation or by law, every stockholder shall have the right
at every meeting of stockholders to one vote for every share standing in the
name of such stockholder on the books of the Company which is entitled to vote
at such meeting. Every stockholder may vote either in person or by proxy.

                                   ARTICLE II

                                   DIRECTORS
                                   ---------

2.1  Number and Term.  The board of directors shall have authority to (i)
     ---------------
determine the number of directors to constitute the board and (ii) fix the terms
of office of the directors.

2.2  Meetings.
     -------- 

     2.2.1    Place. Meetings of the board of directors shall be held at such
              ----- 
place as may be designated by the board or in the notice of the meeting.
<PAGE>
 
     2.2.2    Regular Meetings. Regular meetings of the board of directors shall
              ---------------- 
be held at such times as the board may designate. Notice of regular meetings
need not be given.

     2.2.3    Special Meetings.  Special meetings of the board may be called by
              ----------------
direction of the president or any two members of the board on three days' notice
to each director, either personally or by mail, telegram or facsimile
transmission.

     2.2.4    Quorum. A majority of all the directors in office shall constitute
              ------
a quorum for the transaction of business at any meeting.

     2.2.5    Voting. Except as otherwise provided herein, in the certificate of
              ------
incorporation or by law, the vote of a majority of the directors present at any
meeting at which a quorum is present shall constitute the act of the board of
directors.

     2.2.6    Committees. The board of directors may, by resolution adopted by a
              ----------
majority of the whole board, designate one or more committees, each committee to
consist of one or more directors and such alternate members (also directors) as
may be designated by the board. Unless otherwise provided herein, in the absence
or disqualification of any member of a committee, the member or members thereof
present at any meeting and not disqualified from voting, whether or not such
member or members constitute a quorum, may unanimously appoint another director
to act at the meeting in the place of any such absent or disqualified member.
Except as otherwise provided herein, in the certificate of incorporation or by
law, any such committee shall have and may exercise the powers of the full board
of directors to the extent provided in the resolution of the board directing the
committee.

                                  ARTICLE III

                                    OFFICERS
                                    --------

3.1  Election.  At its first meeting after each annual meeting of the
     --------
stockholders, the board of directors shall elect a president, treasurer,
secretary and such other officers as it deems advisable.

3.2  Authority, Duties and Compensation.  The officers shall have such
     ----------------------------------
authority, perform such duties and serve for such compensation as may be
determined by resolution of the board of directors.  Except as otherwise
provided by board resolution, (i) the president shall be the chief executive
officer of the Company, shall have general supervision over the business and
operations of the Company, may perform any act and execute any instrument for
the conduct of such business and operations and shall preside at all meetings of
the board and stockholders, (ii) the other officers shall have the duties
customarily related to their respective offices, and (iii) any vice president,
or vice presidents in the order determined by the board, shall in the absence of
the president have the authority and perform the duties of the president.

                                      -2-
<PAGE>
 
                                   ARTICLE IV

                                INDEMNIFICATION
                                ---------------

 
4.1  Right to Indemnification.  The Company shall indemnify any person who was
     ------------------------
or is party or is threatened to be made a party to any threatened, pending or
completed action, suit or proceeding, whether civil, criminal, administrative or
investigative (a "proceeding"), by reason of the fact that such person is or was
a director or officer of the Company or a constituent corporation absorbed in a
consolidation or merger, or is or was serving at the request of the Company or a
constituent corporation absorbed in a consolidation or merger, as a director or
officer of another corporation, partnership, joint venture, trust or other
enterprise, or is or was a director or officer of the Company serving at its
request as an administrator, trustee or other fiduciary of one or more of the
employee benefit plans of the Company or other enterprise, against expenses
(including attorneys' fees), liability and loss actually and reasonably incurred
or suffered by such person in connection with such proceeding, whether or not
the indemnified liability arises or arose from any threatened, pending or
completed proceeding by or in the right of the Company, except to the extent
that such indemnification is prohibited by applicable law.

4.2  Advance of Expenses.  Expenses incurred by a director or officer of the
     -------------------
Company in defending a proceeding shall be paid by the Company in advance of the
final disposition of such proceeding subject to the provisions of any applicable
statute.

4.3  Procedure for Determining Permissibility.  To determine whether any
     ----------------------------------------
indemnification or advance of expenses under this Article IV is permissible, the
board of directors by a majority vote of a quorum consisting of directors not
parties to such proceeding may, and on request of any person seeking
indemnification or advance of expenses shall be required to, determine in each
case whether the applicable standards in any applicable statute have been met,
or such determination shall be made by independent legal counsel if such quorum
is not obtainable, or, even if obtainable, a majority vote of a quorum of
disinterested directors so directs, provided that, if there has been a change in
control of the Company between the time of the action or failure to act giving
rise to the claim for indemnification or advance of expenses and the time such
claim is made, at the option of the person seeking indemnification or advance of
expenses, the permissibility of indemnification or advance of expenses shall be
determined by independent legal counsel.  The reasonable expenses of any
director or officer in prosecuting a successful claim for indemnification, and
the fees and expenses of any special legal counsel engaged to determine
permissibility of indemnification or advance of expenses, shall be borne by the
Company.

4.4  Contractual Obligation.  The obligations of the Company to indemnify a
     ----------------------
director or officer under this Article IV, including the duty to advance
expenses, shall be considered a contract between the Company and such director
or officer, and no modification or repeal of any provision of this Article IV
shall affect, to the detriment of the director or officer, such obligations of
the Company in connection with a claim based on any act or failure to act
occurring before such modification or repeal.

                                      -3-
<PAGE>
 
4.5  Indemnification Not Exclusive; Inuring of Benefit.  The indemnification and
     -------------------------------------------------
advance of expenses provided by this Article IV shall not be deemed exclusive of
any other right to which one indemnified may be entitled under any statute,
provision of the Certificate of Incorporation, these bylaws, agreement, vote of
stockholders or disinterested directors or otherwise, both as to action in such
person's official capacity and as to action in another capacity while holding
such office, and shall inure to the benefit of the heirs, executors and
administrators of any such person.

4.6  Insurance and Other Indemnification.  The board of directors shall have the
     -----------------------------------
power to (i) authorize the Company to purchase and maintain, at the Company's
expense, insurance on behalf of the Company and on behalf of others to the
extent that power to do so has not been prohibited by statute, (ii) create any
fund of any nature, whether or not under the control of a trustee, or otherwise
secure any of its indemnification obligations, and (iii) give other
indemnification to the extent permitted by statute.

                                   ARTICLE V

                         TRANSFER OF SHARE CERTIFICATES
                         ------------------------------

 
     Transfers of share certificates and the shares represented thereby shall be
made on the books of the Company only by the registered holder or by duly
authorized attorney.  Transfers shall be made only on surrender of the share
certificate or certificates.

                                   ARTICLE VI

                                   AMENDMENTS
                                   ----------

     These bylaws may be amended or repealed at any regular or special meeting
of the board of directors by vote of a majority of all directors in office or at
any annual or special meeting of stockholders by vote of holders of a majority
of the outstanding stock entitled to vote.  Notice of any such annual or special
meeting of stockholders shall set forth the proposed change or a summary
thereof.


                                      -4-

<PAGE>
 
                                                                    EXHIBIT 4.01


                     GREAT LAKES DREDGE & DOCK CORPORATION

                                SERIES A AND B

                  11 1/4% SENIOR SUBORDINATED NOTES DUE 2008


                                   INDENTURE

                          Dated as of August 19, 1998

                             THE BANK OF NEW YORK

                                    Trustee
<PAGE>
 
                            CROSS-REFERENCE TABLE*


<TABLE>
<CAPTION>
Trust Indenture
  Act Section                                              Indenture Section
<S>                                                        <C>
310(a)(1)................................................        7.10
   (a)(2)................................................        7.10
   (a)(3)................................................        N.A.
   (a)(4)................................................        N.A.
   (a)(5)................................................        7.10
   (b)...................................................        7.10
   (c)...................................................        N.A.
311(a)...................................................        7.11
   (b)...................................................        7.11
   (c)...................................................        N.A.
312(a)...................................................        2.05
   (b)...................................................       12.03
   (c)...................................................       12.03
313(a)...................................................        7.06
   (b)(2)................................................        7.07
   (c)...................................................  7.06;12.02
   (d)...................................................        7.06
314(a)...................................................  4.03;12.02
   (c)(1)................................................       12.04
   (c)(2)................................................       12.04
   (c)(3)................................................        N.A.
   (e)...................................................       12.05
   (f)...................................................        N.A.
315(a)...................................................        7.01
   (b)...................................................  7.05,12.02
   (c)...................................................        7.01
   (d)...................................................        7.01
   (e)...................................................        6.11
316(a) (last sentence)...................................        2.09
   (a)(1)(A).............................................        6.05
   (a)(1)(B).............................................        6.04
   (a)(2)................................................        N.A.
   (b)...................................................        6.07
   (c)...................................................        2.12
317(a)(1)................................................        6.08
   (a)(2)................................................        6.09
   (b)...................................................        2.04
318(a)...................................................       12.01
   (b)...................................................        N.A.
</TABLE> 

<PAGE>
<TABLE> 
<S>                                                             <C>
   (c)...................................................       12.01
</TABLE>

N.A.  means not applicable.
<PAGE>
 
                               TABLE OF CONTENTS
<TABLE> 
<CAPTION> 
                                                                            Page


             ARTICLE 1 DEFINITIONS AND INCORPORATION BY REFERENCE

<S>                                                                         <C> 
Section 1.01. Definitions.................................................     1
Section 1.02. Other Definitions...........................................    19
Section 1.03. Incorporation by Reference of Trust Indenture Act...........    19
Section 1.04. Rules of Construction.......................................    20
                                                                              
                              ARTICLE 2 THE NOTES
                                                                              
Section 2.01. Form and Dating.............................................    20
Section 2.02. Execution and Authentication................................    22
Section 2.03. Registrar and Paying Agent..................................    22
Section 2.04. Paying Agent to Hold Money in Trust.........................    23
Section 2.05. Holder Lists................................................    23
Section 2.06. Transfer and Exchange.......................................    23
Section 2.07. Replacement Notes...........................................    35
Section 2.08. Outstanding Notes...........................................    36
Section 2.09. Treasury Notes..............................................    36
Section 2.10. Temporary Notes.............................................    36
Section 2.11. Cancellation................................................    36
Section 2.12. Defaulted Interest..........................................    37
                                                                              
                      ARTICLE 3 REDEMPTION AND PREPAYMENT
                                                                              
Section 3.01. Notices to Trustee..........................................    37
Section 3.02. Selection of Notes to Be Redeemed...........................    37
Section 3.03. Notice of Redemption........................................    38
Section 3.04. Effect of Notice of Redemption..............................    39
Section 3.05. Deposit of Redemption Price.................................    39
Section 3.06. Notes Redeemed in Part......................................    39
Section 3.07. Optional Redemption.........................................    39
Section 3.08. Mandatory Redemption........................................    40
Section 3.09. Offer to Purchase by Application of Excess Proceeds.........    40
                                                                              
                              ARTICLE 4 COVENANTS

Section 4.01. Payment of Notes............................................    42
Section 4.02. Maintenance of Office or Agency.............................    42
Section 4.03. Reports.....................................................    43
Section 4.04. Compliance Certificate......................................    43
Section 4.05. Taxes.......................................................    44
Section 4.06. Stay, Extension and Usury Laws..............................    44
Section 4.07. Restricted Payments.........................................    44
</TABLE> 

                                       i
<PAGE>
 
<TABLE> 
<S>                                                                                     <C> 
Section 4.08. Dividend and Other Payment Restrictions Affecting Subsidiaries..........  47
Section 4.09. Incurrence of Indebtedness and Issuance of Disqualified Stock...........  48
Section 4.10. Asset Sales.............................................................  51
Section 4.11. Transactions with Affiliates............................................  52
Section 4.12. Liens...................................................................  53
Section 4.13. Business Activities.....................................................  53
Section 4.14. Corporate Existence.....................................................  53
Section 4.15. Offer to Repurchase Upon Change of Control..............................  54
Section 4.16. No Senior Subordinated Debt.............................................  55
Section 4.17. Limitation on Sale and Leaseback Transactions...........................  55
Section 4.18. Limitation on Issuances of Guarantees of Indebtedness...................  55
Section 4.19. Payments for Consent....................................................  56
Section 4.20. Additional Subsidiary Guarantees........................................  56
                                                                                        
                             ARTICLE 5 SUCCESSORS                                       
                                                                                        
Section 5.01. Merger, Consolidation, or Sale of Assets................................  56
Section 5.02. Successor Corporation Substituted.......................................  57
                                                                                        
                        ARTICLE 6 DEFAULTS AND REMEDIES                                 
                                                                                        
Section 6.01. Events of Default.......................................................  57
Section 6.02. Acceleration............................................................  59
Section 6.03. Other Remedies..........................................................  59
Section 6.04. Waiver of Past Defaults.................................................  59
Section 6.05. Control by Majority.....................................................  60
Section 6.06. Limitation on Suits.....................................................  60
Section 6.07. Rights of Holders of Notes to Receive Payment...........................  60
Section 6.08. Collection Suit by Trustee..............................................  61
Section 6.09. Trustee May File Proofs of Claim........................................  61
Section 6.10. Priorities..............................................................  61
Section 6.11. Undertaking for Costs...................................................  62
                                                                                        
                               ARTICLE 7 TRUSTEE                                        
                                                                                        
Section 7.01. Duties of Trustee.......................................................  62
Section 7.02. Rights of Trustee.......................................................  63
Section 7.03. Individual Rights of Trustee............................................  64
Section 7.04. Trustee's Disclaimer....................................................  64
Section 7.05. Notice of Defaults......................................................  65
Section 7.06. Reports by Trustee to Holders of the Notes..............................  65
Section 7.07. Compensation and Indemnity..............................................  65
Section 7.08. Replacement of Trustee..................................................  66
Section 7.09. Successor Trustee by Merger, etc........................................  67
Section 7.10. Eligibility; Disqualification...........................................  67
Section 7.11. Preferential Collection of Claims Against Company.......................  67
</TABLE> 

                                       ii
<PAGE>
 
<TABLE> 
              ARTICLE 8 LEGAL DEFEASANCE AND COVENANT DEFEASANCE
<S>                                                                               <C> 
Section 8.01. Option to Effect Legal Defeasance or Covenant Defeasance........    67
Section 8.02. Legal Defeasance and Discharge..................................    68
Section 8.03. Covenant Defeasance.............................................    68
Section 8.04. Conditions to Legal or Covenant Defeasance......................    69
Section 8.05. Deposited Money and Government Securities to be                       
              Held in Trust; Other Miscellaneous Provisions.................      70
Section 8.06. Repayment to Company............................................    70
Section 8.07. Reinstatement...................................................    71 
                                                                              
                     ARTICLE 9 AMENDMENT, SUPPLEMENT AND WAIVER                  
                                                                              
Section 9.01. Without Consent of Holders of Notes.............................    71
Section 9.02. With Consent of Holders of Notes................................    72
Section 9.03. Compliance with Trust Indenture Act.............................    73
Section 9.04. Revocation and Effect of Consents...............................    74
Section 9.05. Notation on or Exchange of Notes................................    74
Section 9.06. Trustee to Sign Amendments, etc.................................    74
                                                                                    
                             ARTICLE 10 SUBORDINATION                                 
                                                                                    
Section 10.01. Agreement to Subordinate.......................................    75
Section 10.02. Liquidation; Dissolution; Bankruptcy...........................    75
Section 10.03. Default on Designated Senior Debt..............................    75
Section 10.04. Acceleration of Securities.....................................    76
Section 10.05. When Distribution Must Be Paid Over............................    76
Section 10.06. Notice by Company..............................................    77
Section 10.07. Subrogation....................................................    77
Section 10.08. Relative Rights................................................    77
Section 10.09. Subordination May Not Be Impaired by Company...................    77
Section 10.10. Distribution or Notice to Representative.......................    77
Section 10.11. Rights of Trustee and Paying Agent.............................    78
Section 10.12. Authorization to Effect Subordination..........................    78
Section 10.13. Amendments.....................................................    78
Section 10.14. Trustee Not Fiduciary for Holders of Senior Debt...............    78
                                                                                    
                       ARTICLE 11 SUBSIDIARY GUARANTEES                             
                                                                                    
Section 11.01. Guarantee......................................................    79
Section 11.02. Subordination of Subsidiary Guarantee..........................    80
Section 11.03. Limitation on Guarantor Liability..............................    80
Section 11.04. Execution and Delivery of Subsidiary Guarantee.................    80
Section 11.05. Subsidiary Guarantors May Consolidate, etc., on Certain Terms..    81
Section 11.06. Releases Following Sale of Assets..............................    82 
</TABLE> 

                                      iii
<PAGE>
 
<TABLE> 
                                  ARTICLE 12 MISCELLANEOUS
<S>                                                                                               <C> 
Section 12.01. Trust Indenture Act Controls.....................................................  82
Section 12.02. Notices..........................................................................  82
Section 12.03. Communication by Holders of Notes with Other Holders of Notes....................  84
Section 12.04. Certificate and Opinion as to Conditions Precedent...............................  84
Section 12.05. Statements Required in Certificate or Opinion....................................  84
Section 12.06. Rules by Trustee and Agents......................................................  84
Section 12.07. No Personal Liability of Directors, Officers, Employees and Stockholders.........  85
Section 12.08. Governing Law....................................................................  85
Section 12.09. No Adverse Interpretation of Other Agreements....................................  85
Section 12.10. Successors.......................................................................  85
Section 12.11. Severability.....................................................................  85
Section 12.12. Counterpart Originals............................................................  85
Section 12.13. Table of Contents, Headings, etc.................................................  85
</TABLE> 

                                   EXHIBITS
Exhibit A1     FORM OF NOTE
Exhibit A2     FORM OF REGULATION S TEMPORARY GLOBAL NOTE
Exhibit B      FORM OF CERTIFICATE OF TRANSFER
Exhibit C      FORM OF CERTIFICATE OF EXCHANGE
Exhibit D      FORM OF CERTIFICATE OF ACQUIRING INSTITUTIONAL ACCREDITED 
               INVESTOR
Exhibit E      FORM OF SUBSIDIARY GUARANTEE
Exhibit F      FORM OF SUPPLEMENTAL INDENTURE

                                       iv
<PAGE>
 
      INDENTURE dated as of August 19, 1998 among Great Lakes Dredge & Dock
Corporation, a Delaware corporation (the "Company"), the Subsidiary Guarantors
set forth on Schedule I hereto and The Bank of New York, as trustee (the
"Trustee").

      The Company, the Subsidiary Guarantors and the Trustee agree as follows
for the benefit of each other and for the equal and ratable benefit of the
Holders of the 11 1/4% Series A Senior Subordinated Notes due 2008 (the "Series
A Notes") and the 11 1/4% Series B Senior Subordinated Notes due 2008 (the
"Series B Notes" and, together with the Series A Notes, the "Notes"):

                                   ARTICLE 1
                         DEFINITIONS AND INCORPORATION
                                  BY REFERENCE

Section 1.01.  Definitions.

      "144A Global Note" means a global note substantially in the form of
Exhibit A1 hereto bearing the Global Note Legend and the Private Placement
Legend and deposited with or on behalf of, and registered in the name of, the
Depositary or its nominee that will be issued in a denomination equal to the
outstanding principal amount of the Notes sold in reliance on Rule 144A.

      "Acquired Debt" means, with respect to any specified Person, (i)
Indebtedness of any other Person existing at the time such other Person is
merged with or into or became a Subsidiary of such specified Person, including,
without limitation, Indebtedness incurred in connection with, or in
contemplation of, such other Person merging with or into or becoming a
Subsidiary of such specified Person, and (ii) Indebtedness secured by a Lien
encumbering any asset acquired by such specified Person.

      "AcquisitionCo" means Great Lakes Dredge & Dock Acquisition, Inc., a
Delaware corporation.

      "Additional Notes" means up to $40.0 million aggregate principal amount of
Notes (other than the Initial Notes) issued under this Indenture in accordance
with Sections 2.02 and 4.09 hereof, as part of the same series as the Initial
Notes.

      "Affiliate" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person.  For purposes of this definition, "control"
(including, with correlative meanings, the terms "controlling," "controlled by"
and "under common control with"), as used with respect to any Person, shall mean
the possession, directly or indirectly, of the power to direct or cause the
direction of the management or policies of such Person, whether through the
ownership of voting securities, by agreement or otherwise; provided that
beneficial ownership of 10% or more of the Voting Stock of a Person shall be
deemed to be control.

      "Agent" means any Registrar, Paying Agent or co-registrar.

                                       1
<PAGE>
 
      "Applicable Procedures" means, with respect to any transfer or exchange of
or for beneficial interests in any Global Note, the rules and procedures of the
Depositary, Euroclear and Cedel that apply to such transfer or exchange.

      "Asset Sale" means (i) the sale, lease, conveyance or other disposition of
any assets or rights (including, without limitation, by way of a sale and
leaseback) other than sales of inventory in the ordinary course of business
consistent with past practices (provided that the sale, conveyance or other
disposition of all or substantially all of the assets of the Company and its
Subsidiaries, taken as a whole, will be governed by the provisions of Section
4.15 and/or Section 5.01 hereof and not by the provisions of Section 4.10
hereof), and (ii) the issue or sale by any Restricted Subsidiary of Equity
Interests of any of the Company's Subsidiaries, in the case of either clause (i)
or (ii), whether in a single transaction or a series of related transactions (a)
that have a fair market value in excess of $2.0 million or (b) for net proceeds
in excess of $2.0 million.  Notwithstanding the foregoing, the following items
shall not be deemed to be Asset Sales: (i) a transfer of assets by the Company
to a Wholly Owned Restricted Subsidiary or by a Wholly Owned Restricted
Subsidiary to the Company or to another Wholly Owned Restricted Subsidiary, (ii)
an issuance of Equity Interests by a Wholly Owned Restricted Subsidiary to the
Company or to another Wholly Owned Restricted Subsidiary, (iii) a Restricted
Payment that is permitted by Section 4.07 hereof, (iv) the sale and leaseback of
any assets within 120 days of the date of acquisition or completion of
construction of such assets, (v) the sale at fair market value of property or
equipment that has become worn out, obsolete or damaged or otherwise unsuitable
for use in connection with the business of the Company or any Restricted
Subsidiary, as the case may be, in the ordinary course of business and (vi)
bare-boat charters entered into in the ordinary course of business for a term
not to exceed 12 months.

      "Attributable Debt" means in respect of a sale and leaseback transaction,
at the time of determination, the present value (discounted at the rate of
interest implicit in such transaction, determined in accordance with GAAP) of
the obligation of the lessee for net rental payments during the remaining term
of the lease included in such sale and leaseback transaction (including any
period for which such lease has been extended or may, at the option of the
lessor, be extended).

      "Bankruptcy Law" means Title 11, U.S.  Code or any similar federal or
state law for the relief of debtors.

      "Board of Directors" means the Board of Directors of the Company, or any
authorized committee of the Board of Directors.

      "Broker-Dealer" has the meaning set forth in the Registration Rights
Agreement.

      "Business Day" means any day other than a Legal Holiday.

      "Capital Lease Obligation" means, at the time any determination thereof is
to be made, the amount of the liability in respect of a capital lease that would
at such time be required to be capitalized on a balance sheet in accordance with
GAAP.

                                       2
<PAGE>
 
      "Capital Stock" means (i) in the case of a corporation, corporate stock,
(ii) in the case of an association or business entity, any and all shares,
interests, participations, rights or other equivalents (however designated) of
corporate stock, (iii) in the case of a partnership or limited liability
company, partnership or membership interests (whether general or limited) and
(iv) any other interest or participation that confers on a Person the right to
receive a share of the profits and losses of, or distributions of assets of, the
issuing Person.

      "Cash Equivalents" means (i) United States dollars, (ii) securities issued
or directly and fully guaranteed or insured by the United States government or
any agency or instrumentality thereof (provided that the full faith and credit
of the United States is pledged in support thereof) having maturities of not
more than one year from the date of acquisition, (iii) certificates of deposit
and eurodollar time deposits with maturities of one year or less from the date
of acquisition, bankers' acceptances with maturities not exceeding one-year and
overnight bank deposits, in each case with any domestic commercial bank having
capital and surplus in excess of $500 million, (iv) repurchase obligations with
a term of not more than thirty days for underlying securities of the types
described in clauses (ii) and (iii) above entered into with any financial
institution meeting the qualifications specified in clause (iii) above, (v)
obligations issued or fully guaranteed by any state of the United States of
America or any political subdivision of any such state or any public
instrumentality thereof maturing within one year from the date of acquisition
thereof and, at the time of acquisition, having one of the two highest ratings
obtainable from either Standard & Poor's Corporation or Moody's Investors
Service, Inc., (vi) commercial paper having the highest rating obtainable from
Moody's Investors Service, Inc.  or Standard & Poor's Corporation and in each
case maturing within one year after the date of acquisition, (vii) money market
funds at least 95% of the assets of which constitute Cash Equivalents of the
kinds described in clauses (i) through (vii) of this definition and (viii)
short-term asset management accounts offered by any lender under Credit
Facilities for the purpose of investing in notes issued by a corporation (other
than the Company or any Affiliate of the Company) organized under the laws of
any state of the United States or of the District of Columbia and rated A-2 or
higher by Standard & Poor's Rating Group, a division of McGraw Hill, Inc.  or P-
2 or higher by Moody's Investors Service, Inc.

      "Cedel" means Cedel Bank, SA.

      "Change of Control" means the occurrence of any of the following: (i) the
sale, lease, transfer, conveyance or other disposition (other than by way of
merger or consolidation), in one or a series of related transactions, of all or
substantially all of the assets of the Company and its Subsidiaries (determined
on a consolidated basis), in each case, to any "person" (as such term is used in
Section 13(d)(3) of the Exchange Act) other than the Company or a Wholly Owned
Restricted Subsidiary or any Principal or a Related Party of a Principal, (ii)
the adoption of a plan relating to the liquidation or dissolution of the Company
(other than in a transaction which complies with the provisions of Section 5.01
hereof), (iii) the consummation of any transaction (including, without
limitation, any merger or consolidation) the result of which is that any
"person" (as defined above), other than one or more Principals or their Related
Parties, becomes the "beneficial owner" (as such term is defined in Rule 13d-3
and Rule 13d-5 under the Exchange Act, except that a person shall be deemed to
have "beneficial ownership" of all securities that such person has the right to
acquire, whether such right is currently exercisable or is exercisable only upon
the occurrence of a subsequent condition), directly or indirectly, of more than
50% of the Voting Stock of the Company (measured by voting power rather than
number of

                                       3
<PAGE>
 
shares) and the Principals do not beneficially own as much or more of the Voting
Stock of the Company (measured by voting power rather than by number of shares)
than such person or (iv) the first day on which a majority of the members of the
Board of Directors of the Company are not Continuing Directors.

      "Citicorp" means Citicorp, a Delaware corporation, or any successor
thereto by merger or consolidation.

      "Company" means Great Lakes Dredge & Dock Corporation, a Delaware
corporation and successor by merger to AcquisitionCo, and any and all successors
thereto.

      "Consolidated Cash Flow" means, with respect to any Person for any period,
the Consolidated Net Income of such Person for such period plus (i) an amount
equal to any extraordinary or nonrecurring loss plus any net loss realized in
connection with an Asset Sale, to the extent such losses were deducted in
computing such Consolidated Net Income, plus (ii) provision for taxes based on
income or profits of such Person and its Restricted Subsidiaries for such
period, to the extent that such provision for taxes was deducted in computing
such Consolidated Net Income, plus (iii) consolidated interest expense of such
Person and its Restricted Subsidiaries for such period, whether paid or accrued
and whether or not capitalized (including, without limitation, amortization of
debt issuance costs and original issue discount, non-cash interest payments, the
interest component of any deferred payment obligations, the interest component
of all payments associated with Capital Lease Obligations, imputed interest with
respect to Attributable Debt, commissions, discounts and other fees and charges
incurred in respect of letter of credit or bankers' acceptance financings, and
net payments (if any) pursuant to Hedging Obligations), to the extent that any
such expense was deducted in computing such Consolidated Net Income, plus (iv)
depreciation, amortization (including amortization of goodwill and other
intangibles but excluding amortization of prepaid cash expenses that were paid
in a prior period) and other non-cash expenses (excluding any such non-cash
expense to the extent that it represents an accrual of or reserve for cash
expenses in any future period or amortization of a prepaid cash expense that was
paid in a prior period) of such Person and its Restricted Subsidiaries for such
period to the extent that such depreciation, amortization and other non-cash
expenses were deducted in computing such Consolidated Net Income, plus, without
duplication, plus (v) any interest expense on Indebtedness of another person
that is guaranteed by such person or a Subsidiary of such person or secured by a
Lien on the assets of such person or one of its Subsidiaries (to the extent that
such interest expense was deducted in computing Consolidated Net Income in such
period), plus (vi) expenses and charges of the Company related to the
Transaction incurred or for which the Company became obligated on or prior to or
within 30 days after the date of this Indenture plus (vii) incremental expenses
incurred associated with the Chicago Flood Litigation not exceeding $800,000,
minus (viii) non-cash items increasing such Consolidated Net Income for such
period, in each case, on a consolidated basis and determined in accordance with
GAAP.

      "Consolidated Net Income" means, with respect to any Person for any
period, the aggregate of the Net Income of such Person and its Restricted
Subsidiaries for such period, on a consolidated basis, determined in accordance
with GAAP; provided that (i) the Net Income (but not loss) of any Person that is
not a Restricted Subsidiary or that is accounted for by the equity method of
accounting shall be included only to the extent of the amount of dividends or
distributions paid in cash to the referent Person or a Wholly Owned Restricted
Subsidiary thereof, (ii) the Net Income of any Restricted Subsidiary shall be
excluded to the extent that the declaration or payment of dividends or similar
distributions by that

                                       4
<PAGE>
 
Restricted Subsidiary of that Net Income is not at the date of determination
permitted without any prior governmental approval (that has not been obtained)
or, directly or indirectly, by operation of the terms of its charter or any
agreement, instrument, judgment, decree, order, statute, rule or governmental
regulation applicable to that Restricted Subsidiary or its stockholders, (iii)
the Net Income of any Person acquired in a pooling of interests transaction for
any period prior to the date of such acquisition shall be excluded, (iv) the
cumulative effect of a change in accounting principles shall be excluded and (v)
the Net Income (but not loss) of any Unrestricted Subsidiary shall be excluded,
whether or not distributed to the Company or one of its Subsidiaries.

      "Continuing Directors" means, as of any date of determination, any member
of the Board of Directors of the Company who (i) was a member of such Board of
Directors on the date of this Indenture or (ii) was nominated for election or
elected to such Board of Directors with the approval of a majority of the
Continuing Directors who were members of such Board at the time of such
nomination or election or was designated by a Principal or a Related Party of a
Principal.

      "Corporate Trust Office of the Trustee" shall be at the address of the
Trustee specified in Section 12.02 hereof or such other address as to which the
Trustee may give notice to the Company.

      "Credit Facilities" means, with respect to the Company or its Restricted
Subsidiaries, one or more debt facilities (including, without limitation, the
New Credit Facility) or commercial paper facilities with banks or other
institutional lenders providing for revolving credit loans, term loans,
receivables financing (including through the sale of receivables to such lenders
or to special purpose entities formed to borrow from such lenders against such
receivables) or letters of credit, in each case, as increased as permitted by
the terms hereof, and amended, restated, modified, renewed, refunded, replaced
or refinanced in whole or in part from time to time.

      "CVC" means Citicorp Venture Capital, Ltd., a New York corporation, or any
successor thereto by merger or consolidation.

      "Custodian" means the Trustee, as custodian with respect to the Notes in
global form, or any successor entity thereto.

      "Default" means any event that is or with the passage of time or the
giving of notice or both would be an Event of Default.

      "Definitive Note" means a certificated Note registered in the name of the
Holder thereof and issued in accordance with Section 2.06 hereof, substantially
in the form of Exhibit A1 hereto except that such Note shall not bear the Global
Note Legend and shall not have the "Schedule of Exchanges of Interests in the
Global Note" attached thereto.

      "Depositary" means, with respect to the Notes issuable or issued in whole
or in part in global form, the Person specified in Section 2.03 hereof as the
Depositary with respect to the Notes, and any and all successors thereto
appointed as depositary hereunder and having become such pursuant to the
applicable provision of this Indenture.

                                       5
<PAGE>
 
      "Designated Senior Debt" means (i) any Obligations outstanding under the
New Credit Facility (including letters of credit), (ii) any Permitted Bonding
Obligation and (iii) any other Senior Debt permitted hereunder the principal
amount of which is $50.0 million or more and that has been designated by the
Company as "Designated Senior Debt." Notwithstanding the foregoing, Indebtedness
under the New Credit Facility shall be deemed outstanding for purposes of this
definition at all times when the lenders thereunder have an effective commitment
to extend credit thereunder, regardless of whether any such Indebtedness is
actually outstanding at such time.

      "Disqualified Stock" means any Capital Stock that, by its terms (or by the
terms of any security into which it is convertible, or for which it is
exchangeable, at the option of the holder thereof), or upon the happening of any
event, matures or is mandatorily redeemable, pursuant to a sinking fund
obligation or otherwise, or redeemable at the option of the Holder thereof in
whole or in part, on or prior to November 14, 2008; provided, however, that any
Capital Stock that would constitute Disqualified Stock solely because the
holders thereof have the right to require the Company to repurchase such Capital
Stock upon the occurrence of a Change of Control or an Asset Sale shall not
constitute Disqualified Stock if the terms of such Capital Stock provide that
the Company may not repurchase or redeem any such Capital Stock pursuant to such
provisions unless such repurchase or redemption complies with Section 4.07
hereof.

      "Equity Interests" means Capital Stock and all warrants, options or other
rights to acquire Capital Stock (but excluding any debt security that is
convertible into, or exchangeable for, Capital Stock).

      "Euroclear" means Morgan Guaranty Trust Company of New York, Brussels
office, as operator of the Euroclear system.

      "Exchange Act" means the Securities Exchange Act of 1934, as amended.

      "Exchange Notes" means the Notes issued in the Exchange Offer pursuant to
Section 2.06(f) hereof.

      "Exchange Offer" has the meaning set forth in the Registration Rights
Agreement.

      "Exchange Offer Registration Statement" has the meaning set forth in the
Registration Rights Agreement.

      "Existing Indebtedness" means Indebtedness (including Guarantees) of the
Company and its Subsidiaries (other than Indebtedness under the New Credit
Facility) in existence on the date of this Indenture, until such amounts are
permanently repaid.

      "Fixed Charges" means, with respect to any Person for any period, the sum,
without duplication, of (i) the consolidated interest expense of such Person and
its Restricted Subsidiaries for such period, whether paid or accrued (including,
without limitation, amortization of debt issuance costs and original issue
discount, non-cash interest payments, the interest component of any deferred
payment obligations, the interest component of all payments associated with
Capital Lease Obligations, imputed

                                       6
<PAGE>
 
interest with respect to Attributable Debt, commissions, discounts and other
fees and charges incurred in respect of letter of credit or bankers' acceptance
financings, and net payments (if any) pursuant to interest Hedging Obligations;
provided, however, that in no event shall any amortization of deferred financing
costs incurred in connection with the Transaction be included in Fixed Charges)
and (ii) the consolidated interest of such Person and its Restricted
Subsidiaries that was capitalized during such period, and (iii) any interest
expense on Indebtedness of another Person that is Guaranteed by such Person or
one of its Restricted Subsidiaries or secured by a Lien on assets of such Person
or one of its Restricted Subsidiaries (whether or not such Guarantee or Lien is
called upon) and (iv) the product of (a) all cash dividend payments and non-cash
dividend payments, on any series of preferred stock and any series of
Disqualified Stock, in each case, of such Person or any of its Restricted
Subsidiaries, other than dividend payments (x) on Equity Interests payable
solely in Equity Interests of the Company (other than Disqualified Stock) or (y)
to the Company or a Subsidiary Guarantor, times (b) a fraction, the numerator of
which is one and the denominator of which is one minus the then current combined
federal, state and local statutory tax rate of such Person, expressed as a
decimal, in each case, on a consolidated basis and in accordance with GAAP.

      "Fixed Charge Coverage Ratio" means with respect to any Person for any
period, the ratio of the Consolidated Cash Flow of such Person for such period
to the Fixed Charges of such Person for such period.  In the event that the
referent Person or any of its Restricted Subsidiaries incurs, assumes,
Guarantees, repays or redeems any Indebtedness (other than repayment of
revolving credit borrowings that are not accompanied by a permanent reduction in
the commitment amount) or issues or redeems preferred stock subsequent to the
commencement of the period for which the Fixed Charge Coverage Ratio is being
calculated but prior to the date on which the event for which the calculation of
the Fixed Charge Coverage Ratio is made (the "Calculation Date"), then the Fixed
Charge Coverage Ratio shall be calculated giving pro forma effect to such
incurrence, assumption, Guarantee or redemption of Indebtedness, or such
issuance or redemption of preferred stock, as if the same had occurred at the
beginning of the applicable four-quarter reference period.  In addition, for
purposes of making the computation referred to above, (i) acquisitions that have
been made by the Company or any of its Restricted Subsidiaries, including
through mergers (including the Merger) or consolidations and including any
related financing transactions, during the four-quarter reference period or
subsequent to such reference period and on or prior to the Calculation Date
shall be deemed to have occurred on the first day of the four-quarter reference
period and Consolidated Cash Flow for such reference period shall be calculated
without giving effect to clause (iii) of the proviso set forth in the definition
of Consolidated Net Income, (ii) the Consolidated Cash Flow attributable to
discontinued operations, as determined in accordance with GAAP, and operations
or businesses disposed of prior to the Calculation Date, shall be excluded, and
(iii) the Fixed Charges attributable to discontinued operations, as determined
in accordance with GAAP, and operations or businesses disposed of prior to the
Calculation Date, shall be excluded, but only to the extent that the obligations
giving rise to such Fixed Charges will not be obligations of the referent Person
or any of its Restricted Subsidiaries following the Calculation Date.

      "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as have been approved by a significant segment of the accounting
profession, which are in effect on the date of this Indenture.

                                       7
<PAGE>
 
      "Global Notes" means, individually and collectively, each of the
Restricted Global Notes and the Unrestricted Global Notes, substantially in the
form of Exhibit A hereto issued in accordance with Section 2.01, 2.06(b)(iv),
2.06(d)(ii) or 2.06(f) hereof.

      "Global Note Legend" means the legend set forth in Section 2.06(g)(ii),
which is required to be placed on all Global Notes issued under this Indenture.

      "Government Securities" means direct obligations of, or obligations
guaranteed by, the United States of America, and the payment for which the
United States pledges its full faith and credit.

      "Guarantee" means a guarantee (other than by endorsement of negotiable
instruments for collection in the ordinary course of business), direct or
indirect, in any manner (including, without limitation, letters of credit and
reimbursement agreements in respect thereof), of all or any part of any
Indebtedness.

      "Hedging Obligations" means, with respect to any Person, the obligations
of such Person under (i) interest rate or currency swap agreements, interest
rate cap agreements and interest rate collar agreements, (ii) other agreements
or arrangements solely designed to protect such Person against fluctuations in
interest or currency exchange rates and (iii) commodities purchase and sale
agreements and other similar agreements designed to protect such Person against
fluctuations in the price of raw materials used by the Company and its
Restricted Subsidiaries in the ordinary course of business.

      "Holder" means a Person in whose name a Note is registered.

      "Indebtedness" means, with respect to any Person, any indebtedness of such
Person, whether or not contingent, in respect of borrowed money or evidenced by
bonds, notes, debentures or similar instruments or letters of credit (or
reimbursement agreements in respect thereof) or banker's acceptances or
representing Capital Lease Obligations or the balance deferred and unpaid of the
purchase price of any property or representing any Hedging Obligations, except
any such balance that constitutes an accrued expense or trade payable, if and to
the extent any of the foregoing (other than letters of credit, Hedging
Obligations and Attributable Debt) would appear as a liability upon a balance
sheet of such Person prepared in accordance with GAAP, as well as all
Indebtedness of others secured by a Lien on any asset of such Person (whether or
not such Indebtedness is assumed by such Person) and, to the extent not
otherwise included, the Guarantee by such Person of any indebtedness of any
other Person.  The amount of any Indebtedness (other than Hedging Obligations,
guarantees and Attributable Debt) outstanding as of any date shall be (i) the
accreted value thereof, in the case of any Indebtedness issued with original
issue discount, and (ii) the principal amount thereof, together with any
interest thereon that is more than 30 days past due, in the case of any other
Indebtedness.

      "Indenture" means this Indenture, as amended or supplemented from time to
time.

      "Indirect Participant" means a Person who holds a beneficial interest in a
Global Note through a Participant.

                                       8
<PAGE>
 
      "Initial Notes" means the first $115,000,000 aggregate principal amount of
Notes issued under this Indenture on the date hereof.

      "Institutional Accredited Investor" means an institution that is an
"accredited investor" as defined in Rule 501(a)(1), (2), (3) or (7) under the
Securities Act, who are not also QIBs.

      "Investments" means, with respect to any Person, all investments by such
Person in other Persons (including Affiliates) in the forms of direct or
indirect loans (including guarantees of Indebtedness or other obligations),
advances or capital contributions (excluding commission, travel and similar
advances to officers and employees made in the ordinary course of business),
purchases or other acquisitions of Indebtedness, Equity Interests or other
securities, together with all items that are or would be classified as
investments on a balance sheet prepared in accordance with GAAP; provided that
an acquisition of Equity Interests or other securities by the Company or any of
its Restricted Subsidiaries for consideration consisting solely of Equity
Interests (other than Disqualified Stock) of the Company shall not be deemed to
be an Investment. If the Company or any Restricted Subsidiary of the Company
sells or otherwise disposes of any Equity Interests of any direct or indirect
Restricted Subsidiary of the Company such that, after giving effect to any such
sale or disposition, such Person is no longer a Restricted Subsidiary of the
Company, the Company shall be deemed to have made an Investment on the date of
any such sale or disposition equal to the fair market value of the Equity
Interests of such Restricted Subsidiary not sold or disposed of in an amount
determined as provided in the final paragraph of Section 4.07 hereof.

      "Legal Holiday" means a Saturday, a Sunday or a day on which banking
institutions in the City of New York or at a place of payment are authorized by
law, regulation or executive order to remain closed.  If a payment date is a
Legal Holiday at a place of payment, payment may be made at that place on the
next succeeding day that is not a Legal Holiday, and no interest shall accrue on
such payment for the intervening period.

      "Letter of Transmittal" means the letter of transmittal to be prepared by
the Company and sent to all Holders of the Notes for use by such Holders in
connection with the Exchange Offer.

      "Lien" means, with respect to any asset, any mortgage, lien, pledge,
charge, security interest or encumbrance of any kind in respect of such asset,
whether or not filed, recorded or otherwise perfected under applicable law
(including any conditional sale or other title retention agreement, any lease in
the nature thereof, any option or other agreement to sell or give a security
interest in and any filing of or agreement to give any financing statement under
the Uniform Commercial Code (or equivalent statutes) of any jurisdiction).

      "Liquidated Damages" means all liquidated damages then owing pursuant to
Section 5 of the Registration Rights Agreement.

      "Management Investors" means certain members of management of the Company
that own capital stock of the Company.

                                       9
<PAGE>
 
      "Merger" means, in connection with the Recapitalization and pursuant to
the Merger Agreement, the merger of AcquisitionCo with and into the Company,
with the Company as the surviving entity.

      "Merger Agreement" means the Agreement and Plan of Merger, dated July 20,
1998, among Vectura, AcquisitionCo, GLI Acquisition, Inc., the Company, Great
Lakes International, Inc., Blackstone Dredging Partners, L.P. and Blackstone
Family Investment Partnership L.P, as amended and restated on August 19, 1998.

      "Net Income" means, with respect to any Person for any period, the net
income (loss) of such Person, determined in accordance with GAAP and before any
reduction in respect of dividends on preferred interests, (i) excluding,
however, (a) any gain (but not loss), together with any related provision for
taxes on such gain (but not loss), realized in connection with (1) any Asset
Sale (including, without limitation, dispositions pursuant to sale and leaseback
transactions) or (2) the disposition of any securities by such Person or any of
its Restricted Subsidiaries or the extinguishment of any Indebtedness of such
Person or any of its Restricted Subsidiaries and (b) any extraordinary or
nonrecurring gain (but not loss), together with any related provision for taxes
on such extraordinary or nonrecurring gain (but not loss) and (ii) less the
aggregate amount of all Restricted Payments made by such Person or any of its
Restricted Subsidiaries for such period pursuant to clause (vii) of Section 4.07
hereof to the extent not otherwise deducted in computing such Net Income.

      "Net Proceeds" means the aggregate cash proceeds received by the Company
or any of its Restricted Subsidiaries in respect of any Asset Sale (including,
without limitation, any cash received upon the sale or other disposition of any
non-cash consideration received in any Asset Sale), net of the direct costs
relating to such Asset Sale (including, without limitation, legal, accounting
and investment banking fees, and sales commissions) and any relocation expenses
incurred as a result thereof, any taxes paid or payable as a result thereof
(after taking into account any available tax credits or deductions and any tax
sharing arrangements), and any reserve for adjustment in respect of the sale
price of such asset or assets established in accordance with GAAP.

      "New Bonding Agreement" means that certain second Amended and Restated
Underwriting and Continuing Indemnity Agreement, dated as of the date of this
Indenture, by and among the Company, certain of its Subsidiaries and the
Sureties, including any related notes, guarantees, collateral documents,
instruments and agreements executed in connection therewith, as amended,
restated, modified, renewed, refunded, replaced or refinanced from time to time.

      "New Credit Facility" means that certain Credit Agreement, dated as of the
date of this Indenture, by and among the Company, Bank of America National Trust
and Savings Association, as agent, and certain other lenders party thereto,
initially providing for up to $55.0 million of revolving credit borrowings and
$55.0 million of term borrowings, including any related notes, guarantees,
collateral documents, instruments and agreements executed in connection
therewith, and in each case as increased as permitted by the terms hereof, and
amended, modified, renewed, restated, refunded, replaced or refinanced from time
to time.

                                       10
<PAGE>
 
      "Non-Recourse Debt" means Indebtedness (i) as to which neither the Company
nor any of its Restricted Subsidiaries (a) provides credit support of any kind
(including any undertaking, agreement or instrument that would constitute
Indebtedness), (b) is directly or indirectly liable (as a guarantor or
otherwise), or (c) constitutes the lender; and (ii) no default with respect to
which (including any rights that the holders thereof may have to take
enforcement action against an Unrestricted Subsidiary) would permit (upon
notice, lapse of time or both) any holder of any other Indebtedness (other than
the Notes being offered hereby) of the Company or any of its Restricted
Subsidiaries to declare a default on such other Indebtedness or cause the
payment thereof to be accelerated or payable prior to its stated maturity; and
(iii) as to which the lenders have been notified in writing that they will not
have any recourse to the stock or assets of the Company or any of its Restricted
Subsidiaries.

      "Non-U.S.  Person" means a Person who is not a U.S.  Person.

      "Notes" has the meaning assigned to it in the preamble to this Indenture.
The Initial Notes and the Additional Notes shall be treated as a single class
for all purposes under this Indenture.

      "Obligations" means any principal, interest, penalties, fees,
indemnifications, costs, expenses, reimbursement obligations, damages and other
liabilities and obligations which may arise under or in connection with the New
Credit Facility or the New Bonding Agreement or under or in connection with the
documentation governing any Indebtedness, and in all cases whether direct or
indirect, absolute or contingent, now outstanding or hereafter created, assumed
or incurred and including, without limitation, interest accruing subsequent to
the filing of a petition in bankruptcy or the commencement of any insolvency,
reorganization or similar proceedings at the rate provided in the relevant
document, whether or not an allowed claim, and any obligation to redeem or
defease any of the foregoing.

      "Offering" means the offering of the Notes by the Company.

      "Officer" means, with respect to any Person, the Chairman of the Board,
the Chief Executive Officer, the President, the Chief Operating Officer, the
Chief Financial Officer, the Treasurer, any Assistant Treasurer, the Controller,
the Secretary or any Vice-President of such Person.

      "Officers' Certificate" means a certificate signed on behalf of the
Company by two Officers of the Company, one of whom must be the principal
executive officer, the principal financial officer, the treasurer or the
principal accounting officer of the Company, that meets the requirements of
Section 12.05 hereof.

      "Opinion of Counsel" means an opinion from legal counsel who is reasonably
acceptable to the Trustee, that meets the requirements of Section 12.05 hereof.
The counsel may be an employee of or counsel to the Company, any Subsidiary of
the Company or the Trustee.

      "Participant" means, with respect to the Depositary, Euroclear or Cedel, a
Person who has an account with the Depositary, Euroclear or Cedel, respectively
(and, with respect to DTC, shall include Euroclear and Cedel).

                                       11
<PAGE>
 
      "Permitted Bonding Obligations" means (i) obligations incurred by the
Company or any of its Subsidiaries (including Guarantees) with respect to bid,
performance, surety, appeal or similar bonds and completion guarantees in the
ordinary course of business and consistent with past practices and (ii)
obligations incurred by the Company or any of its Subsidiaries (including
Guarantees) under the New Bonding Agreement.

      "Permitted Business" means any of the businesses engaged in by the Company
and its Restricted Subsidiaries on the date of this Indenture and any other
business reasonably related, complementary or ancillary thereto.

      "Permitted Investments" means (a) any Investment in the Company or in a
Restricted Subsidiary of the Company that is a Subsidiary Guarantor and is
engaged in a Permitted Business; (b) any Investment in Cash Equivalents; (c) any
Investment by the Company or any Restricted Subsidiary of the Company in a
Person, if as a result of such Investment (i) such Person becomes a Restricted
Subsidiary of the Company and a Subsidiary Guarantor and is engaged in a
Permitted Business or (ii) such Person is merged, consolidated or amalgamated
with or into, or transfers or conveys substantially all of its assets to, or is
liquidated into, the Company or a Restricted Subsidiary of the Company that is a
Subsidiary Guarantor and that is engaged in Permitted Business; (d) any
Investment made as a result of the receipt of assets not constituting Cash
Equivalents from an Asset Sale that was made pursuant to and in compliance with
Section 4.10 hereof; (e) any acquisition of assets solely in exchange for the
issuance of Equity Interests (other than Disqualified Stock) of the Company; (f)
other Investments in any Person having an aggregate fair market value (measured
on the date each such Investment was made and without giving effect to
subsequent changes in value), when taken together with all other Investments
made pursuant to this clause (f) that are at the time outstanding, not to exceed
$10.0 million; (g) Investments in securities of customers received in settlement
of obligations or pursuant to a plan of reorganization or similar arrangement
upon the bankruptcy or insolvency of such trade creditors or customers; (h)
Investments existing on the date of this Indenture; (i) loans and advances to
officers, directors, members and employees for business-related travel expenses,
moving expenses and other similar expenses, in each case, incurred in the
ordinary course of business and consistent with past practices not to exceed
$1.0 million in the aggregate at any time; (j) any Hedging Obligation; (k)
Investments consisting of intercompany loans from the Company and its Restricted
Subsidiaries to Restricted Subsidiaries, including Restricted Subsidiaries that
are not Subsidiary Guarantors; (l) Investments consisting of capital
contributions from the Company or any Restricted Subsidiaries to Restricted
Subsidiaries that are not Subsidiary Guarantors in an aggregate amount at any
one time outstanding not to exceed $10.0 million; and (m) Investments in joint
ventures formed in the ordinary course of business for the purpose of bidding
and completing specific projects within a Permitted Business in an aggregate
amount at any one time outstanding not to exceed $5.0 million.

      "Permitted Junior Securities" means Equity Interests in the Company or any
Subsidiary Guarantor or debt securities that are subordinated to all Senior Debt
(and any debt securities issued in exchange for Senior Debt) to substantially
the same extent as, or to a greater extent than, the Notes are subordinated to
Senior Debt pursuant to this Indenture; provided that no such Equity Interests
or debt securities may be issued if the rights of the holders of the Senior Debt
are impaired by any such issuance in connection with a reorganization,
including, without limitation, by reason of such rights being impaired within
the meaning of Section 1124 of Title 11 of the United States Code.

                                       12
<PAGE>
 
      "Permitted Liens" means (i) Liens on assets of the Company securing Senior
Debt of the Company and Liens on assets of Subsidiary Guarantors securing Senior
Debt, provided, in each case, that such Indebtedness was permitted by the terms
of this Indenture to be incurred; (ii) Liens in favor of the Company or a
Subsidiary Guarantor; (iii) Liens on property of a Person existing at the time
such Person is merged with or into or consolidated with the Company or any
Restricted Subsidiary of the Company; provided that such Liens were in existence
prior to the contemplation of such merger or consolidation and do not extend to
any assets other than those of the Person merged into or consolidated with the
Company; (iv) Liens on property existing at the time of acquisition thereof by
the Company or any Restricted Subsidiary of the Company, provided that such
Liens were in existence prior to the contemplation of such acquisition; (v)
Liens to secure the performance of statutory obligations, surety or appeal
bonds, bid bonds, payment bonds, performance and lien bonds or other obligations
of a like nature incurred in the ordinary course of business; (vi) Liens to
secure Indebtedness (including Capital Lease Obligations) permitted by clause
(v) or (ix) of the second paragraph of Section 4.09 hereof covering, in the case
of such clause (v), only the assets acquired with such Indebtedness; (vii) Liens
existing on the date of this Indenture; (viii) Liens for taxes, assessments or
governmental charges or claims that are not yet delinquent or that are being
contested in good faith by appropriate proceedings promptly instituted and
diligently concluded, provided that any reserve or other appropriate provision
as shall be required in conformity with GAAP shall have been made therefor; (ix)
Liens on assets of Unrestricted Subsidiaries that secure Non-Recourse Debt of
Unrestricted Subsidiaries; (x) Liens incurred in the ordinary course of business
of the Company or any Restricted Subsidiary of the Company with respect to
obligations that do not exceed $7.5 million at any one time outstanding and that
(a) are not incurred in connection with the borrowing of money or the obtaining
of advances or credit (other than trade credit in the ordinary course of
business) and (b) do not in the aggregate materially detract from the value of
the property or materially impair the use thereof in the operation of business
by the Company or such Restricted Subsidiary; (xi) statutory Liens of landlords
and Liens of carriers, warehousemen, mechanics, suppliers, materialmen,
repairmen and other Liens (including statutory maritime Liens) imposed by law
incurred in the ordinary course of business; (xii) Liens incurred or deposits
made in the ordinary course of business in connection with workers'
compensation, unemployment insurance and other types of social security or
similar obligations, or to secure the performance of tenders, statutory
obligations, surety and appeal bonds, bids, leases, government contracts,
performance and return-of-money bonds and other similar obligations (exclusive
of obligations for the payment of borrowed money); (xiii) judgment or attachment
Liens not giving rise to an Event of Default; (xiv) easements, rights-of-way,
zoning restrictions and other similar charges or encumbrances in respect of real
property not interfering in any material respect with the ordinary course of the
business of the Company or any of its Restricted Subsidiaries; (xv) any interest
or title of a lessor under any lease, whether or not characterized as capital or
operating; provided that such Liens do not extend to any property or assets
which is not leased property subject to such lease; (xvi) Liens securing Hedging
Obligations which Hedging Obligations relate to Indebtedness that is otherwise
permitted under this Indenture; (xvii) Liens securing reimbursement obligations
with respect to letters of credit and products and proceeds thereof; (xviii)
Liens securing Permitted Refinancing Indebtedness which is incurred to refinance
any Indebtedness which has been secured by a Lien permitted under this Indenture
and which has been incurred in accordance with the provisions hereof; (xix)
Liens in favor of the Company or any of its Restricted Subsidiaries securing
Indebtedness of any Restricted Subsidiary that is not a Subsidiary Guarantor;
(xx) Liens with respect to current wages of the master and crew and for wages of
a stevedore when employed directly by the Company or any Subsidiary of the
Company, or by the charterer, operator, master or agent of any of the vessels
owned or

                                       13
<PAGE>
 
operated by the Company or any Subsidiary of the Company; and (xxi) Liens for
salvage (including contract salvage).

      "Permitted Refinancing Indebtedness" means any Indebtedness of the Company
or any of its Restricted Subsidiaries issued in exchange for, to extend,
refinance, renew, replace, defease or refund other Indebtedness of the Company
or any of its Restricted Subsidiaries (other than intercompany Indebtedness);
provided that: (i) the principal amount (or accreted value, if applicable) of
such Permitted Refinancing Indebtedness does not exceed the principal amount of
(or accreted value, if applicable), plus accrued interest on, the Indebtedness
so extended, refinanced, renewed, replaced, defeased or refunded (plus the
amount of reasonable expenses, premiums, penalties, fees and interest incurred
in connection therewith); (ii) such Permitted Refinancing Indebtedness has a
final maturity date later than the final maturity date of, and has a Weighted
Average Life to Maturity equal to or greater than the Weighted Average Life to
Maturity of, the Indebtedness being extended, refinanced, renewed, replaced,
defeased or refunded; (iii) if the Indebtedness being extended, refinanced,
renewed, replaced, defeased or refunded is subordinated in right of payment to
the Notes, such Permitted Refinancing Indebtedness has a final maturity date
later than the final maturity date of, and is subordinated in right of payment
to, the Notes on terms at least as favorable to the Holders of Notes as those
contained in the documentation governing the Indebtedness being extended,
refinanced, renewed, replaced, defeased or refunded; and (iv) such Indebtedness
is incurred either by the Company or by the Restricted Subsidiary who is the
obligor on the Indebtedness being extended, refinanced, renewed, replaced,
defeased or refunded.

      "Person" means any individual, corporation, partnership, joint venture,
association, joint-stock company, trust, unincorporated organization or
government or agency or political subdivision thereof.

      "Principals" means (i) CVC and the Management Investors and (ii) any
Related Party of a Person referred to in clause (i).

      "Private Placement Legend" means the legend set forth in Section
2.06(g)(i) to be placed on all Notes issued under this Indenture except where
otherwise permitted by the provisions of this Indenture.

      "Public Equity Offering" means a public offering pursuant to an effective
registration statement under the Securities Act of Equity Interests (other than
Disqualified Stock) of the Company.

      "QIB" means a "qualified institutional buyer" as defined in Rule 144A.

      "Qualified Proceeds" means any of the following or any combination of the
following: (i) cash, (ii) Cash Equivalents, (iii) assets that are used or useful
in a Permitted Business and (iv) the Capital Stock of any Person engaged in a
Permitted Business if, in connection with the receipt by the Company or any
Restricted Subsidiary of the Company of such Capital Stock, (a) such Person
becomes a Restricted Subsidiary of the Company or any Restricted Subsidiary of
the Company or (b) such Person is merged, consolidated or amalgamated with or
into, or transfers or conveys substantially all of its assets to, or is
liquidated into, the Company or any Restricted Subsidiary of the Company.

                                       14
<PAGE>
 
      "Recapitalization" means the recapitalization of the Company pursuant to
the Merger Agreement.

      "Registration Rights Agreement" means the Registration Rights Agreement,
dated as of August 19, 1998, by and among the Company and the other parties
named on the signature pages thereof, as such agreement may be amended, modified
or supplemented from time to time, and, with respect to any Additional Notes,
one or more registration rights agreements between the Company and the other
parties thereto, as such agreement(s) may be amended, modified or supplemented
from time to time, relating to rights given by the Company to the purchasers of
Additional Notes to register such Additional Notes under the Securities Act.

      "Regulation S" means Regulation S promulgated under the Securities Act.

      "Regulation S Global Note" means a Regulation S Temporary Global Note or
Regulation S Permanent Global Note, as appropriate.

      "Regulation S Permanent Global Note" means a permanent global Note in the
form of Exhibit A1 hereto bearing the Global Note Legend and the Private
Placement Legend and deposited with or on behalf of and registered in the name
of the Depositary or its nominee, issued in a denomination equal to the
outstanding principal amount of the Regulation S Temporary Global Note upon
expiration of the Restricted Period.

      "Regulation S Temporary Global Note" means a temporary global Note in the
form of Exhibit A2 hereto bearing the Private Placement Legend and deposited
with or on behalf of and registered in the name of the Depositary or its
nominee, issued in a denomination equal to the outstanding principal amount of
the Notes initially sold in reliance on Rule 903 of Regulation S.

      "Related Party" means (a) with respect to CVC (i) Citicorp, any direct or
indirect wholly owned subsidiary of Citicorp, and any officer, director or
employee of CVC, Citicorp or any wholly owned subsidiary of Citicorp, (ii) any
spouse or lineal descendant (including by adoption and stepchildren) of the
officers, directors and employees referred to in clause (a) (i) above, (iii) any
trust, corporation or partnership 100%-in-interest of the beneficiaries,
stockholders or partners of which consists of one or more of the persons
described in clause (a) (i) or (ii) above or (iv) Vectura, so long as CVC or any
of its Related Parties described in (i), (ii) or (iii) above holds at least 50%
of the Great Lakes membership interests in Vectura; and (b) with respect to any
officer or employee of the Company or a Subsidiary of the Company (i) any spouse
or lineal descendant (including by adoption and stepchildren) of such officer or
employee and (ii) any trust, corporation or partnership 100%-in-interest of the
beneficiaries, stockholders or partners of which consists of such officer or
employee, any of the persons described in clause (b) (i) above or any
combination thereof.

      "Representative" means the indenture trustee or other trustee, agent or
representative for any Senior Debt.

      "Responsible Officer," when used with respect to the Trustee, means any
officer within the Corporate Trust Administration of the Trustee (or any
successor group of the Trustee) or any other

                                       15
<PAGE>
 
officer of the Trustee customarily performing functions similar to those
performed by any of the above designated officers and also means, with respect
to a particular corporate trust matter, any other officer to whom such matter is
referred because of his knowledge of and familiarity with the particular
subject.

      "Restricted Definitive Note" means a Definitive Note bearing the Private
Placement Legend.

      "Restricted Global Note" means a Global Note bearing the Private Placement
Legend.

      "Restricted Investment" means an Investment other than a Permitted
Investment.

      "Restricted Period" means the 40-day restricted period as defined in
Regulation S.

      "Restricted Subsidiary" of a Person means any Subsidiary of the referent
Person that is not an Unrestricted Subsidiary.

      "Rule 144" means Rule 144 promulgated under the Securities Act.

      "Rule 144A" means Rule 144A promulgated under the Securities Act.

      "Rule 903" means Rule 903 promulgated under the Securities Act.

      "Rule 904" means Rule 904 promulgated the Securities Act.

      "SEC" means the Securities and Exchange Commission.

      "Securities Act" means the Securities Act of 1933, as amended.

      "Senior Debt" means (i) all Obligations of the Company or a Subsidiary
Guarantor outstanding under the New Credit Facility, including any Guarantee
thereof and all Hedging Obligations with respect thereto and all interest and
fees accrued with respect thereto following the commencement of a proceeding
under bankruptcy law, whether or not considered an allowed claim in such
proceeding, (ii) all Permitted Bonding Obligations from time to time
outstanding, (iii) any other Indebtedness of the Company or a Subsidiary
Guarantor permitted to be incurred under the terms of this Indenture, unless the
instrument under which such Indebtedness is incurred expressly provides that it
is on a parity with or subordinated in right of payment to the Notes and (iv)
all Obligations with respect to the foregoing.  Notwithstanding anything to the
contrary in the foregoing, Senior Debt shall not include (v) any liability for
federal, state, local or other taxes owed or owing, (w) any Indebtedness of the
Company or any Subsidiary Guarantor to any Subsidiary of the Company or any
other Affiliates of the Company, (x) any trade payables, (y) any Indebtedness
which is expressly subordinated to any other Indebtedness of the Company or any
of its Subsidiaries, or (z) any Indebtedness that is incurred in violation of
this Indenture.

      "Shelf Registration Statement" means the Shelf Registration Statement as
defined in the Registration Rights Agreement.

                                       16
<PAGE>
 
      "Significant Subsidiary" means any Subsidiary that would be a "significant
subsidiary" as defined in Article 1, Rule 1-02 of Regulation S-X, promulgated
pursuant to the Act, as such Regulation is in effect on the date hereof.

      "Stated Maturity" means, with respect to any installment of interest or
principal (including any sinking fund payment) on any series of Indebtedness,
the date on which such payment of interest or principal was scheduled to be paid
in the original documentation governing such Indebtedness, and shall not include
any contingent obligations to repay, redeem or repurchase any such interest or
principal prior to the date originally scheduled for the payment thereof.

      "Stockholders' Agreement" means the Securities Purchase and Holders
Agreement among the stockholders of the Company, as in effect on the date of
this Indenture.

      "Subsidiary" means, with respect to any Person, (i) any corporation,
association or other business entity of which more than 50% of the total voting
power of shares of Capital Stock entitled (without regard to the occurrence of
any contingency) to vote in the election of directors, managers or trustees
thereof is at the time owned or controlled, directly or indirectly, by such
Person or one or more of the other Subsidiaries of that Person (or a combination
thereof) and (ii) any partnership (a) the sole general partner or the managing
general partner of which is such Person or a Subsidiary of such Person or (b)
the only general partners of which are such Person or of one or more
Subsidiaries of such Person (or any combination thereof).

      "Subsidiary Guarantee" means a guarantee (other than by endorsement of
negotiable instruments for collection in the ordinary course of business),
direct or indirect, in any manner (including, without limitation, by way of a
pledge of assets or through letters of credit or reimbursement agreements in
respect thereof), of all or any part of any Indebtedness.

      "Subsidiary Guarantors" means each of (i) the wholly owned domestic
Restricted Subsidiaries of the Company on the date of this Indenture and (ii)
any other subsidiary that executes a Subsidiary Guarantee in accordance with the
provisions hereof, and their respective successors and assigns.

      "Sureties" means Reliance Insurance Company, United Pacific Insurance
Company, Reliance National Insurance Company and Reliance Surety Company,
together with any of their respective Affiliates.

      "TIA" means the Trust Indenture Act of 1939 (15 U.S.C.  (S)(S) 77aaa-
77bbbb) as in effect on the date on which this Indenture is qualified under the
TIA.

      "Transaction" means the Recapitalization and the funding thereof pursuant
to the issuance of capital stock by the Company to Vectura and the Management
Investors, borrowings by the Company under the New Credit Facility and
consummation of the Offering.

      "Trustee" means the party named as such above until a successor replaces
it in accordance with the applicable provisions of this Indenture and thereafter
means the successor serving hereunder.

                                       17
<PAGE>
 
      "Unrestricted Global Note" means a permanent global Note substantially in
the form of Exhibit A1 attached hereto that bears the Global Note Legend and
that has the "Schedule of Exchanges of Interests in the Global Note" attached
thereto, and that is deposited with or on behalf of and registered in the name
of the Depositary, representing a series of Notes that do not bear the Private
Placement Legend.

      "Unrestricted Definitive Note" means one or more Definitive Notes that do
not bear and are not required to bear the Private Placement Legend.

      "Unrestricted Subsidiary" means (i) any Subsidiary of the Company (or any
successor to any of them) that is designated by the Board of Directors of the
Company as an Unrestricted Subsidiary pursuant to a board resolution; but only
to the extent that such Subsidiary: (a) has no Indebtedness other than Non-
Recourse Debt; (b) is not party to any agreement, contract, arrangement or
understanding with the Company or any Restricted Subsidiary of the Company
unless the terms of any such agreement, contract, arrangement or understanding
are no less favorable to the Company or such Restricted Subsidiary than those
that might be obtained at the time from Persons who are not Affiliates of the
Company; (c) is a Person with respect to which neither the Company nor any of
its Restricted Subsidiaries has any direct or indirect obligation (x) to
subscribe for additional Equity Interests or (y) to maintain or preserve such
Person's financial condition or to cause such Person to achieve any specified
levels of operating results; (d) has not guaranteed or otherwise directly or
indirectly provided credit support for any Indebtedness of the Company or any of
its Restricted Subsidiaries; and (e) has at least one director on its board of
directors that is not a director or executive officer of the Company or any of
its Restricted Subsidiaries and has at least one executive officer that is not a
director or executive officer of the Company or any of its Restricted
Subsidiaries. Any such designation by the Board of Directors shall be evidenced
to the Trustee by filing with the Trustee a certified copy of the Board
Resolution giving effect to such designation and an Officers' Certificate
certifying that such designation complied with the foregoing conditions and was
permitted by Section 4.07 hereof. If, at any time, any Unrestricted Subsidiary
would fail to meet the foregoing requirements as an Unrestricted Subsidiary, it
shall thereafter cease to be an Unrestricted Subsidiary for purposes of this
Indenture and any Indebtedness of such Subsidiary shall be deemed to be incurred
by a Restricted Subsidiary of the Company as of such date (and, if such
Indebtedness is not permitted to be incurred as of such date under Section 4.09
hereof, the Company shall be in default of such covenant). The Board of
Directors of the Company may at any time designate any Unrestricted Subsidiary
to be a Restricted Subsidiary; provided that such designation shall be deemed to
be an incurrence of Indebtedness by a Restricted Subsidiary of the Company of
any outstanding Indebtedness of such Unrestricted Subsidiary and such
designation shall only be permitted if (i) such Indebtedness is permitted under
Section 4.09 hereof, calculated on a pro forma basis as if such designation had
occurred at the beginning of the four-quarter reference period, and (ii) no
Default or Event of Default would be in existence following such designation.

      "U.S. Person" means a U.S.  person as defined in Rule 902(o) under the
Securities Act.

      "Vectura" means Vectura Holdings, LLC, a Delaware limited liability
company, or any successor thereto by merger or consolidation.

                                       18
<PAGE>
 
      "Voting Stock" of any Person as of any date means the Capital Stock of
such Person that is at the time entitled to vote in the election of the Board of
Directors of such Person.

      "Weighted Average Life to Maturity" means, when applied to any
Indebtedness at any date, the number of years obtained by dividing (i) the sum
of the products obtained by multiplying (a) the amount of each then remaining
installment, sinking fund, serial maturity or other required payments of
principal, including payment at final maturity, in respect thereof, by (b) the
number of years (calculated to the nearest one-twelfth) that will elapse between
such date and the making of such payment, by (ii) the then outstanding principal
amount of such Indebtedness.

      "Wholly Owned Restricted Subsidiary" of any Person means a Restricted
Subsidiary of such Person all of the outstanding Capital Stock or other
ownership interests of which (other than directors' qualifying shares) shall at
the time be owned by such Person or by one or more Wholly Owned Restricted
Subsidiaries of such Person and one or more Wholly Owned Restricted Subsidiaries
of such Person.

Section 1.02.  Other Definitions.


                                                                    Defined in  
    Term                                                              Section   
    -----                                                             -------   
    "Affiliate Transaction"........................................    4.11     
    "Asset Sale Offer".............................................    3.09     
    "Authentication Order".........................................    2.02     
    "Change of Control Offer"......................................    4.15     
    "Change of Control Payment"....................................    4.15     
    "Change of Control Payment Date"...............................    4.15     
    "Covenant Defeasance"..........................................    8.03     
    "DTC"...........................................................   2.03     
    "Event of Default"..............................................   6.01     
    "Excess Proceeds"...............................................   4.10     
    "incur".........................................................   4.09     
    "Legal Defeasance"..............................................   8.02     
    "Offer Amount"..................................................   3.09     
    "Offer Period"..................................................   3.09     
    "Paying Agent"..................................................   2.03     
    "Payment Blockage Notice".......................................  10.03    
    "Payment Default"...............................................   6.01     
    "Permitted Debt"................................................   4.09     
    "Purchase Date".................................................   3.09     
    "Registrar".....................................................   2.03     
    "Restricted Payments"..........................................    4.07 

Section 1.03.  Incorporation by Reference of Trust Indenture Act.

      Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated by reference in and made a part of this Indenture.

                                       19
<PAGE>
 
      The following TIA terms used in this Indenture have the following
meanings:

      "indenture securities" means the Notes;

      "indenture security Holder" means a Holder of a Note;

      "indenture to be qualified" means this Indenture;

      "indenture trustee" or "institutional trustee" means the Trustee; and

      "obligor" on the Notes and the Subsidiary Guarantees means the Company and
the Subsidiary Guarantors, respectively, and any successor obligor upon the
Notes and the Subsidiary Guarantees, respectively.

      All other terms used in this Indenture that are defined by the TIA,
defined by TIA reference to another statute or defined by SEC rule under the TIA
have the meanings so assigned to them.

Section 1.04.  Rules of Construction.

      Unless the context otherwise requires:

      (a) a term has the meaning assigned to it;

      (b) an accounting term not otherwise defined has the meaning assigned to
it in accordance with GAAP;

      (c)  "or" is not exclusive;

      (d) words in the singular include the plural, and in the plural include
the singular;

      (e) provisions apply to successive events and transactions;

      (f) references to sections of or rules under the Securities Act shall be
deemed to include substitute, replacement of successor sections or rules adopted
by the SEC from time to time; and

      (g) the word "including" means "including without limitation."

                                   ARTICLE 2
                                   THE NOTES

Section 2.01.  Form and Dating.

      (a) General.  The Notes and the Trustee's certificate of authentication
shall be substantially in the form of Exhibit A hereto.  The Notes may have
notations, legends or endorsements required by

                                       20
<PAGE>
 
law, stock exchange rule or usage. Each Note shall be dated the date of its
authentication. The Notes shall be in denominations of $1,000 and integral
multiples thereof.

     The terms and provisions contained in the Notes shall constitute, and are
hereby expressly made, a part of this Indenture and the Company, the Subsidiary
Guarantors and the Trustee, by their execution and delivery of this Indenture,
expressly agree to such terms and provisions and to be bound thereby.  However,
to the extent any provision of any Note conflicts with the express provisions of
this Indenture, the provisions of this Indenture shall govern and be
controlling.

     (b) Global Notes.  Notes issued in global form shall be substantially in
the form of Exhibits A1 or A2 attached hereto (including the Global Note Legend
thereon and the "Schedule of Exchanges of Interests in the Global Note" attached
thereto).  Notes issued in definitive form shall be substantially in the form of
Exhibit A1 attached hereto (but without the Global Note Legend thereon and
without the "Schedule of Exchanges of Interests in the Global Note" attached
thereto).  Each Global Note shall represent such of the outstanding Notes as
shall be specified therein and each shall provide that it shall represent the
aggregate principal amount of outstanding Notes from time to time endorsed
thereon and that the aggregate principal amount of outstanding Notes represented
thereby may from time to time be reduced or increased, as appropriate, to
reflect exchanges and redemptions.  Any endorsement of a Global Note to reflect
the amount of any increase or decrease in the aggregate principal amount of
outstanding Notes represented thereby shall be made by the Trustee or the
Custodian, at the direction of the Trustee, in accordance with instructions
given by the Holder thereof as required by Section 2.06 hereof.

     (c) Temporary Global Notes.  Notes offered and sold in reliance on
Regulation S shall be issued initially in the form of the Regulation S Temporary
Global Note, which shall be deposited on behalf of the purchasers of the Notes
represented thereby with the Trustee, at its New York office, as custodian for
the Depositary, and registered in the name of the Depositary or the nominee of
the Depositary for the accounts of designated agents holding on behalf of
Euroclear or Cedel Bank, duly executed by the Company and authenticated by the
Trustee as hereinafter provided.  The Restricted Period shall be terminated upon
the receipt by the Trustee of (i) a written certificate from the Depositary,
together with copies of certificates from Euroclear and Cedel Bank certifying
that they have received certification of non-United States beneficial ownership
of 100% of the aggregate principal amount of the Regulation S Temporary Global
Note (except to the extent of any beneficial owners thereof who acquired an
interest therein during the Restricted Period pursuant to another exemption from
registration under the Securities Act and who will take delivery of a beneficial
ownership interest in a 144A Global Note bearing a Private Placement Legend, all
as contemplated by Section 2.06(a)(ii) hereof), and (ii) an Officers'
Certificate from the Company.  Following the termination of the Restricted
Period, beneficial interests in the Regulation S Temporary Global Note shall be
exchanged for beneficial interests in Regulation S Permanent Global Notes
pursuant to the Applicable Procedures.  Simultaneously with the authentication
of Regulation S Permanent Global Notes, the Trustee shall cancel the Regulation
S Temporary Global Note.  The aggregate principal amount of the Regulation S
Temporary Global Note and the Regulation S Permanent Global Notes may from time
to time be increased or decreased by adjustments made on the records of the
Trustee and the Depositary or its nominee, as the case may be, in connection
with transfers of interest as hereinafter provided.

                                       21
<PAGE>
 
     (d) Euroclear and Cedel Procedures Applicable.  The provisions of the
"Operating Procedures of the Euroclear System" and "Terms and Conditions
Governing Use of Euroclear" and the "General Terms and Conditions of Cedel Bank"
and "Customer Handbook" of Cedel Bank shall be applicable to transfers of
beneficial interests in the Regulation S Temporary Global Note and the
Regulation S Permanent Global Notes that are held by Participants through
Euroclear or Cedel Bank.

Section 2.02.  Execution and Authentication.

     One Officer shall sign the Notes for the Company by manual or facsimile
signature.

     If the Officer whose signature is on a Note no longer holds that office at
the time a Note is authenticated, the Note shall nevertheless be valid.

     A Note shall not be valid until authenticated by the manual signature of
the Trustee.  The signature shall be conclusive evidence that the Note has been
authenticated under this Indenture.

     The Trustee shall, upon a written order of the Company signed by one
Officer (an "Authentication Order"), authenticate Notes for original issue up to
the aggregate principal amount stated in paragraph 4 of the Notes.  The
aggregate principal amount of Notes outstanding at any time may not exceed such
amount except as provided in Section 2.07 hereof.

     The Trustee may appoint an authenticating agent acceptable to the Company
to authenticate Notes.  An authenticating agent may authenticate Notes whenever
the Trustee may do so.  Each reference in this Indenture to authentication by
the Trustee includes authentication by such agent.  An authenticating agent has
the same rights as an Agent to deal with Holders or an Affiliate of the Company.

Section 2.03.  Registrar and Paying Agent.

     The Company shall maintain an office or agency where Notes may be
presented for registration of transfer or for exchange ("Registrar") and an
office or agency where Notes may be presented for payment ("Paying Agent").  The
Registrar shall keep a register of the Notes and of their transfer and exchange.
The Company may appoint one or more co-registrars and one or more additional
paying agents.  The term "Registrar" includes any co-registrar and the term
"Paying Agent" includes any additional paying agent.  The Company may change any
Paying Agent or Registrar without notice to any Holder.  The Company shall
notify the Trustee in writing of the name and address of any Agent not a party
to this Indenture.  If the Company fails to appoint or maintain another entity
as Registrar or Paying Agent, the Trustee shall act as such.  The Company or any
of its Restricted Subsidiaries may act as Paying Agent or Registrar.

     The Company initially appoints The Depository Trust Company ("DTC") to act
as Depositary with respect to the Global Notes.

     The Company initially appoints the Trustee to act as the Registrar and
Paying Agent and to act as Custodian with respect to the Global Notes.

                                       22
<PAGE>
 
Section 2.04.  Paying Agent to Hold Money in Trust.

     The Company shall require each Paying Agent other than the Trustee to
agree in writing that the Paying Agent will hold in trust for the benefit of
Holders or the Trustee all money held by the Paying Agent for the payment of
principal, premium or Liquidated Damages, if any, or interest on the Notes, and
will notify the Trustee of any default by the Company in making any such
payment.  While any such default continues, the Trustee may require a Paying
Agent to pay all money held by it to the Trustee.  The Company at any time may
require a Paying Agent to pay all money held by it to the Trustee.  Upon payment
over to the Trustee, the Paying Agent (if other than the Company or a
Subsidiary) shall have no further liability for the money.  If the Company or a
Restricted Subsidiary acts as Paying Agent, it shall segregate and hold in a
separate trust fund for the benefit of the Holders all money held by it as
Paying Agent.  Upon any bankruptcy or reorganization proceedings relating to the
Company, the Trustee shall serve as Paying Agent for the Notes.

Section 2.05.  Holder Lists.

     The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
all Holders and shall otherwise comply with TIA (S) 312(a).  If the Trustee is
not the Registrar, the Company shall furnish to the Trustee at least seven
Business Days before each interest payment date and at such other times as the
Trustee may request in writing, a list in such form and as of such date as the
Trustee may reasonably require of the names and addresses of the Holders of
Notes and the Company shall otherwise comply with TIA (S) 312(a).

Section 2.06.  Transfer and Exchange.

     (a) Transfer and Exchange of Global Notes.  A Global Note may not be
transferred as a whole except by the Depositary to a nominee of the Depositary,
by a nominee of the Depositary to the Depositary or to another nominee of the
Depositary, or by the Depositary or any such nominee to a successor Depositary
or a nominee of such successor Depositary.  All Global Notes will be exchanged
by the Company for Definitive Notes if (i) the Company delivers to the Trustee
notice from the Depositary that it is unwilling or unable to continue to act as
Depositary or that it is no longer a clearing agency registered under the
Exchange Act and, in either case, a successor Depositary is not appointed by the
Company within 120 days after the date of such notice from the Depositary or
(ii) the Company in its sole discretion determines that the Global Notes (in
whole but not in part) should be exchanged for Definitive Notes and delivers a
written notice to such effect to the Trustee; provided that in no event shall
the Regulation S Temporary Global Note be exchanged by the Company for
Definitive Notes prior to (x) the expiration of the Restricted Period and (y)
the receipt by the Registrar of any certificates required pursuant to Rule
903(c)(3)(ii)(B) under the Securities Act.  Upon the occurrence of either of the
preceding events in (i) or (ii) above, Definitive Notes shall be issued in such
names as the Depositary shall instruct the Trustee.  Global Notes also may be
exchanged or replaced, in whole or in part, as provided in Sections 2.07 and
2.10 hereof.  Every Note authenticated and delivered in exchange for, or in lieu
of, a Global Note or any portion thereof, pursuant to this Section 2.06 or
Section 2.07 or 2.10 hereof, shall be authenticated and delivered in the form
of, and shall be, a Global Note.  A Global Note may not be exchanged for another
Note other than as provided in this Section 2.06(a), however, beneficial

                                       23
<PAGE>
 
interests in a Global Note may be transferred and exchanged as provided in
Section 2.06(b), (c) or (f) hereof.

     (b) Transfer and Exchange of Beneficial Interests in the Global Notes.
The transfer and exchange of beneficial interests in the Global Notes shall be
effected through the Depositary, in accordance with the provisions of this
Indenture and the Applicable Procedures.  Beneficial interests in the Restricted
Global Notes shall be subject to restrictions on transfer comparable to those
set forth herein to the extent required by the Securities Act.  Transfers of
beneficial interests in the Global Notes also shall require compliance with
either subparagraph (i) or (ii) below, as applicable, as well as one or more of
the other following subparagraphs, as applicable:

          (i)    Transfer of Beneficial Interests in the Same Global Note.
   Beneficial interests in any Restricted Global Note may be transferred to
   Persons who take delivery thereof in the form of a beneficial interest in the
   same Restricted Global Note in accordance with the transfer restrictions set
   forth in the Private Placement Legend; provided, however, that prior to the
   expiration of the Restricted Period, transfers of beneficial interests in the
   Temporary Regulation S Global Note may not be made to a U.S. Person or for
   the account or benefit of a U.S. Person (other than an Initial Purchaser).
   Beneficial interests in any Unrestricted Global Note may be transferred to
   Persons who take delivery thereof in the form of a beneficial interest in an
   Unrestricted Global Note. No written orders or instructions shall be required
   to be delivered to the Registrar to effect the transfers described in this
   Section 2.06(b)(i).

          (ii)   All Other Transfers and Exchanges of Beneficial Interests in
   Global Notes.  In connection with all transfers and exchanges of beneficial
   interests that are not subject to Section 2.06(b)(i) above, the transferor of
   such beneficial interest must deliver to the Registrar either (A) (1) a
   written order from a Participant or an Indirect Participant given to the
   Depositary in accordance with the Applicable Procedures directing the
   Depositary to credit or cause to be credited a beneficial interest in another
   Global Note in an amount equal to the beneficial interest to be transferred
   or exchanged and (2) instructions given in accordance with the Applicable
   Procedures containing information regarding the Participant account to be
   credited with such increase or (B) (1) a written order from a Participant or
   an Indirect Participant given to the Depositary in accordance with the
   Applicable Procedures directing the Depositary to cause to be issued a
   Definitive Note in an amount equal to the beneficial interest to be
   transferred or exchanged and (2) instructions given by the Depositary to the
   Registrar containing information regarding the Person in whose name such
   Definitive Note shall be registered to effect the transfer or exchange
   referred to in (1) above; provided that in no event shall Definitive Notes be
   issued upon the transfer or exchange of beneficial interests in the
   Regulation S Temporary Global Note prior to (x) the expiration of the
   Restricted Period and (y) the receipt by the Registrar of any certificates
   required pursuant to Rule 903 under the Securities Act.  Upon consummation of
   an Exchange Offer by the Company in accordance with Section 2.06(f) hereof,
   the requirements of this Section 2.06(b)(ii) shall be deemed to have been
   satisfied upon receipt by the Registrar of the instructions contained in the
   Letter of Transmittal delivered by the Holder of such beneficial interests in
   the Restricted Global Notes.  Upon satisfaction of all of the requirements
   for transfer or exchange of beneficial interests in Global Notes contained in
   this Indenture and the Notes or otherwise applicable under the Securities
   Act,

                                       24
<PAGE>
 
   the Trustee shall adjust the principal amount of the relevant Global
   Note(s) pursuant to Section 2.06(h) hereof.

          (iii)  Transfer of Beneficial Interests to Another Restricted Global
   Note.  A beneficial interest in any Restricted Global Note may be transferred
   to a Person who takes delivery thereof in the form of a beneficial interest
   in another Restricted Global Note if the transfer complies with the
   requirements of Section 2.06(b)(ii) above and the Registrar receives the
   following:

                 (A) if the transferee will take delivery in the form of a
      beneficial interest in the 144A Global Note, then the transferor must
      deliver a certificate in the form of Exhibit B hereto, including the
      certifications in item (1) thereof; and

                 (B) if the transferee will take delivery in the form of a
      beneficial interest in the Regulation S Temporary Global Note or the
      Regulation S Global Note, then the transferor must deliver a certificate
      in the form of Exhibit B hereto, including the certifications in item (2)
      thereof.

          (iv)   Transfer and Exchange of Beneficial Interests in a Restricted
   Global Note for Beneficial Interests in the Unrestricted Global Note.  A
   beneficial interest in any Restricted Global Note may be exchanged by any
   holder thereof for a beneficial interest in an Unrestricted Global Note or
   transferred to a Person who takes delivery thereof in the form of a
   beneficial interest in an Unrestricted Global Note if the exchange or
   transfer complies with the requirements of Section 2.06(b)(ii) above and:

                 (A) such exchange or transfer is effected pursuant to the
      Exchange Offer in accordance with the Registration Rights Agreement and
      the holder of the beneficial interest to be transferred, in the case of an
      exchange, or the transferee, in the case of a transfer, certifies in the
      applicable Letter of Transmittal that it is not (1) a broker-dealer, (2) a
      Person participating in the distribution of the Exchange Notes or (3) a
      Person who is an affiliate (as defined in Rule 144) of the Company;

                 (B) such transfer is effected pursuant to the Shelf
      Registration Statement in accordance with the Registration Rights
      Agreement;

                 (C) such transfer is effected by a Broker-Dealer pursuant to
      the Exchange Offer Registration Statement in accordance with the
      Registration Rights Agreement; or

                 (D) the Registrar receives the following:

                     (1) if the holder of such beneficial interest in a
         Restricted Global Note proposes to exchange such beneficial interest
         for a beneficial interest in an Unrestricted Global Note, a certificate
         from such holder in the form of Exhibit C hereto, including the
         certifications in item (1)(a) thereof; or

                     (2) if the holder of such beneficial interest in a
         Restricted Global Note proposes to transfer such beneficial interest to
         a Person who shall take delivery thereof in

                                       25
<PAGE>
 
          the form of a beneficial interest in an Unrestricted Global Note, a
          certificate from such holder in the form of Exhibit B hereto,
          including the certifications in item (4) thereof;

      and, in each such case set forth in this subparagraph (D), if the
      Registrar so requests or if the Applicable Procedures so require, an
      Opinion of Counsel in form reasonably acceptable to the Registrar to the
      effect that such exchange or transfer is in compliance with the Securities
      Act and that the restrictions on transfer contained herein and in the
      Private Placement Legend are no longer required in order to maintain
      compliance with the Securities Act.

          If any such transfer is effected pursuant to subparagraph (B) or (D)
   above at a time when an Unrestricted Global Note has not yet been issued, the
   Company shall issue and, upon receipt of an Authentication Order in
   accordance with Section 2.02 hereof, the Trustee shall authenticate one or
   more Unrestricted Global Notes in an aggregate principal amount equal to the
   aggregate principal amount of beneficial interests transferred pursuant to
   subparagraph (B) or (D) above.

          Beneficial interests in an Unrestricted Global Note cannot be
   exchanged for, or transferred to Persons who take delivery thereof in the
   form of, a beneficial interest in a Restricted Global Note.

     (c)  Transfer or Exchange of Beneficial Interests for Definitive Notes.

          (i) Beneficial Interests in Restricted Global Notes to Restricted
   Definitive Notes.  If any holder of a beneficial interest in a Restricted
   Global Note proposes to exchange such beneficial interest for a Restricted
   Definitive Note or to transfer such beneficial interest to a Person who takes
   delivery thereof in the form of a Restricted Definitive Note, then, upon
   receipt by the Registrar of the following documentation:

              (A) if the holder of such beneficial interest in a Restricted
      Global Note proposes to exchange such beneficial interest for a Restricted
      Definitive Note, a certificate from such holder in the form of Exhibit C
      hereto, including the certifications in item (2)(a) thereof;

              (B) if such beneficial interest is being transferred to a QIB in
      accordance with Rule 144A under the Securities Act, a certificate to the
      effect set forth in Exhibit B hereto, including the certifications in item
      (1) thereof;

              (C) if such beneficial interest is being transferred to a Non-U.S.
      Person in an offshore transaction in accordance with Rule 903 or Rule 904
      under the Securities Act, a certificate to the effect set forth in Exhibit
      B hereto, including the certifications in item (2) thereof;

              (D) if such beneficial interest is being transferred pursuant to
      an exemption from the registration requirements of the Securities Act in
      accordance with Rule 144 under the Securities Act, a certificate to the
      effect set forth in Exhibit B hereto, including the certifications in item
      (3)(a) thereof;

                                       26
<PAGE>
 
              (E) if such beneficial interest is being transferred to an
      Institutional Accredited Investor in reliance on an exemption from the
      registration requirements of the Securities Act other than those listed in
      subparagraphs (B) through (D) above, a certificate to the effect set forth
      in Exhibit B hereto, including the certifications, certificates and
      Opinion of Counsel required by item (3) thereof, if applicable;

              (F) if such beneficial interest is being transferred to the
      Company or any of its Subsidiaries, a certificate to the effect set forth
      in Exhibit B hereto, including the certifications in item (3)(b) thereof;
      or

              (G) if such beneficial interest is being transferred pursuant to
      an effective registration statement under the Securities Act, a
      certificate to the effect set forth in Exhibit B hereto, including the
      certifications in item (3)(c) thereof,

the Trustee shall cause the aggregate principal amount of the applicable Global
Note to be reduced accordingly pursuant to Section 2.06(h) hereof, and the
Company shall execute and the Trustee shall authenticate and deliver to the
Person designated in the instructions a Definitive Note in the appropriate
principal amount. Any Definitive Note issued in exchange for a beneficial
interest in a Restricted Global Note pursuant to this Section 2.06(c) shall be
registered in such name or names and in such authorized denomination or
denominations as the holder of such beneficial interest shall instruct the
Registrar through instructions from the Depositary and the Participant or
Indirect Participant. The Trustee shall deliver such Definitive Notes to the
Persons in whose names such Notes are so registered. Any Definitive Note issued
in exchange for a beneficial interest in a Restricted Global Note pursuant to
this Section 2.06(c)(i) shall bear the Private Placement Legend and shall be
subject to all restrictions on transfer contained therein.

          (ii)   Beneficial Interests in Regulation S Temporary Global Note to
Definitive Notes. Notwithstanding Sections 2.06(c)(i)(A) and (C) hereof, a
beneficial interest in the Regulation S Temporary Global Note may not be
exchanged for a Definitive Note or transferred to a Person who takes delivery
thereof in the form of a Definitive Note prior to (x) the expiration of the
Restricted Period and (y) the receipt by the Registrar of any certificates
required pursuant to Rule 903(c)(3)(ii)(B) under the Securities Act, except in
the case of a transfer pursuant to an exemption from the registration
requirements of the Securities Act other than Rule 903 or Rule 904.

          (iii)  Beneficial Interests in Restricted Global Notes to Unrestricted
Definitive Notes. A holder of a beneficial interest in a Restricted Global Note
may exchange such beneficial interest for an Unrestricted Definitive Note or may
transfer such beneficial interest to a Person who takes delivery thereof in the
form of an Unrestricted Definitive Note only if:

                 (A) such exchange or transfer is effected pursuant to the
      Exchange Offer in accordance with the Registration Rights Agreement and
      the holder of such beneficial interest, in the case of an exchange, or the
      transferee, in the case of a transfer, certifies in the applicable Letter
      of Transmittal that it is not (1) a broker-dealer, (2) a Person
      participating in the distribution of the Exchange Notes or (3) a Person
      who is an affiliate (as defined in Rule 144) of the Company;

                                       27
<PAGE>
 
                 (B) such transfer is effected pursuant to the Shelf
      Registration Statement in accordance with the Registration Rights
      Agreement;

                 (C) such transfer is effected by a Broker-Dealer pursuant to
      the Exchange Offer Registration Statement in accordance with the
      Registration Rights Agreement; or

                 (D) the Registrar receives the following:

                     (1) if the holder of such beneficial interest in a
         Restricted Global Note proposes to exchange such beneficial interest
         for a Definitive Note that does not bear the Private Placement Legend,
         a certificate from such holder in the form of Exhibit C hereto,
         including the certifications in item (1)(b) thereof; or

                      (2) if the holder of such beneficial interest in a
         Restricted Global Note proposes to transfer such beneficial interest to
         a Person who shall take delivery thereof in the form of a Definitive
         Note that does not bear the Private Placement Legend, a certificate
         from such holder in the form of Exhibit B hereto, including the
         certifications in item (4) thereof;

     and, in each such case set forth in this subparagraph (D), if the Registrar
     so requests or if the Applicable Procedures so require, an Opinion of
     Counsel in form reasonably acceptable to the Registrar to the effect that
     such exchange or transfer is in compliance with the Securities Act and that
     the restrictions on transfer contained herein and in the Private Placement
     Legend are no longer required in order to maintain compliance with the
     Securities Act.

          (iv) Beneficial Interests in Unrestricted Global Notes to Unrestricted
Definitive Notes. If any holder of a beneficial interest in an Unrestricted
Global Note proposes to exchange such beneficial interest for a Definitive Note
or to transfer such beneficial interest to a Person who takes delivery thereof
in the form of a Definitive Note, then, upon satisfaction of the conditions set
forth in Section 2.06(b)(ii) hereof, the Trustee shall cause the aggregate
principal amount of the applicable Global Note to be reduced accordingly
pursuant to Section 2.06(h) hereof, and the Company shall execute and the
Trustee shall authenticate and deliver to the Person designated in the
instructions a Definitive Note in the appropriate principal amount. Any
Definitive Note issued in exchange for a beneficial interest pursuant to this
Section 2.06(c)(iii) shall be registered in such name or names and in such
authorized denomination or denominations as the holder of such beneficial
interest shall instruct the Registrar through instructions from the Depositary
and the Participant or Indirect Participant. The Trustee shall deliver such
Definitive Notes to the Persons in whose names such Notes are so registered. Any
Definitive Note issued in exchange for a beneficial interest pursuant to this
Section 2.06(c)(iii) shall not bear the Private Placement Legend.

     (d)  Transfer and Exchange of Definitive Notes for Beneficial Interests in
Global Notes.

          (i) Restricted Definitive Notes to Beneficial Interests in Restricted
   Global Notes.  If any Holder of a Restricted Definitive Note proposes to
   exchange such Note for a beneficial interest in a Restricted Global Note or
   to transfer such Restricted Definitive Notes to a Person who takes

                                       28
<PAGE>
 
delivery thereof in the form of a beneficial interest in a Restricted Global
Note, then, upon receipt by the Registrar of the following documentation:

            (A) if the Holder of such Restricted Definitive Note proposes to
      exchange such Note for a beneficial interest in a Restricted Global Note,
      a certificate from such Holder in the form of Exhibit C hereto, including
      the certifications in item (2)(b) thereof;

            (B) if such Restricted Definitive Note is being transferred to a QIB
      in accordance with Rule 144A under the Securities Act, a certificate to
      the effect set forth in Exhibit B hereto, including the certifications in
      item (1) thereof;

            (C) if such Restricted Definitive Note is being transferred to a
      Non-U.S.  Person in an offshore transaction in accordance with Rule 903 or
      Rule 904 under the Securities Act, a certificate to the effect set forth
      in Exhibit B hereto, including the certifications in item (2) thereof;

            (D) if such Restricted Definitive Note is being transferred pursuant
      to an exemption from the registration requirements of the Securities Act
      in accordance with Rule 144 under the Securities Act, a certificate to the
      effect set forth in Exhibit B hereto, including the certifications in item
      (3)(a) thereof;

            (E) if such Restricted Definitive Note is being transferred to an
      Institutional Accredited Investor in reliance on an exemption from the
      registration requirements of the Securities Act other than those listed in
      subparagraphs (B) through (D) above, a certificate to the effect set forth
      in Exhibit B hereto, including the certifications, certificates and
      Opinion of Counsel required by item (3) thereof, if applicable;

            (F) if such Restricted Definitive Note is being transferred to the
      Company or any of its Subsidiaries, a certificate to the effect set forth
      in Exhibit B hereto, including the certifications in item (3)(b) thereof;
      or

            (G) if such Restricted Definitive Note is being transferred pursuant
      to an effective registration statement under the Securities Act, a
      certificate to the effect set forth in Exhibit B hereto, including the
      certifications in item (3)(c) thereof,

the Trustee shall cancel the Restricted Definitive Note, increase or cause to be
increased the aggregate principal amount of, in the case of clause (A) above,
the appropriate Restricted Global Note, in the case of clause (B) above, the
144A Global Note, and in the case of clause (C) above, the Regulation S Global
Note.

          (ii) Restricted Definitive Notes to Beneficial Interests in
   Unrestricted Global Notes.  A Holder of a Restricted Definitive Note may
   exchange such Note for a beneficial interest in an Unrestricted Global Note
   or transfer such Restricted Definitive Note to a Person who takes delivery
   thereof in the form of a beneficial interest in an Unrestricted Global Note
   only if:

                                       29
<PAGE>
 
            (A) such exchange or transfer is effected pursuant to the Exchange
      Offer in accordance with the Registration Rights Agreement and the Holder,
      in the case of an exchange, or the transferee, in the case of a transfer,
      certifies in the applicable Letter of Transmittal that it is not (1) a
      broker-dealer, (2) a Person participating in the distribution of the
      Exchange Notes or (3) a Person who is an affiliate (as defined in Rule
      144) of the Company;

            (B) such transfer is effected pursuant to the Shelf Registration
      Statement in accordance with the Registration Rights Agreement;

            (C) such transfer is effected by a Broker-Dealer pursuant to the
      Exchange Offer Registration Statement in accordance with the Registration
      Rights Agreement; or

            (D) the Registrar receives the following:

                (1) if the Holder of such Definitive Notes proposes to exchange
         such Notes for a beneficial interest in the Unrestricted Global Note, a
         certificate from such Holder in the form of Exhibit C hereto, including
         the certifications in item (1)(c) thereof; or

                (2) if the Holder of such Definitive Notes proposes to transfer
         such Notes to a Person who shall take delivery thereof in the form of a
         beneficial interest in the Unrestricted Global Note, a certificate from
         such Holder in the form of Exhibit B hereto, including the
         certifications in item (4) thereof;

     and, in each such case set forth in this subparagraph (D), if the Registrar
     so requests or if the Applicable Procedures so require, an Opinion of
     Counsel in form reasonably acceptable to the Registrar to the effect that
     such exchange or transfer is in compliance with the Securities Act and that
     the restrictions on transfer contained herein and in the Private Placement
     Legend are no longer required in order to maintain compliance with the
     Securities Act.

          Upon satisfaction of the conditions of any of the subparagraphs in
   this Section 2.06(d)(ii), the Trustee shall cancel the Definitive Notes and
   increase or cause to be increased the aggregate principal amount of the
   Unrestricted Global Note.

          (iii)  Unrestricted Definitive Notes to Beneficial Interests in
   Unrestricted Global Notes.  A Holder of an Unrestricted Definitive Note may
   exchange such Note for a beneficial interest in an Unrestricted Global Note
   or transfer such Definitive Notes to a Person who takes delivery thereof in
   the form of a beneficial interest in an Unrestricted Global Note at any time.
   Upon receipt of a request for such an exchange or transfer, the Trustee shall
   cancel the applicable Unrestricted Definitive Note and increase or cause to
   be increased the aggregate principal amount of one of the Unrestricted Global
   Notes.

          If any such exchange or transfer from a Definitive Note to a
     beneficial interest is effected pursuant to subparagraphs (ii)(B), (ii)(D)
     or (iii) above at a time when an Unrestricted Global Note has not yet been
     issued, the Company shall issue and, upon receipt of an Authentication
     Order in accordance with Section 2.02 hereof, the Trustee shall
     authenticate one or more Unrestricted Global

                                       30
<PAGE>
 
     Notes in an aggregate principal amount equal to the principal amount of
   Definitive Notes so transferred.

     (e) Transfer and Exchange of Definitive Notes for Definitive Notes.  Upon
request by a Holder of Definitive Notes and such Holder's compliance with the
provisions of this Section 2.06(e), the Registrar shall register the transfer or
exchange of Definitive Notes.  Prior to such registration of transfer or
exchange, the requesting Holder shall present or surrender to the Registrar the
Definitive Notes duly endorsed or accompanied by a written instruction of
transfer in form satisfactory to the Registrar duly executed by such Holder or
by its attorney, duly authorized in writing.  In addition, the requesting Holder
shall provide any additional certifications, documents and information, as
applicable, required pursuant to the following provisions of this Section
2.06(e).

          (i) Restricted Definitive Notes to Restricted Definitive Notes.  Any
   Restricted Definitive Note may be transferred to and registered in the name
   of Persons who take delivery thereof in the form of a Restricted Definitive
   Note if the Registrar receives the following:

              (A) if the transfer will be made pursuant to Rule 144A under the
      Securities Act, then the transferor must deliver a certificate in the form
      of Exhibit B hereto, including the certifications in item (1) thereof;

              (B) if the transfer will be made pursuant to Rule 903 or Rule 904,
      then the transferor must deliver a certificate in the form of Exhibit B
      hereto, including the certifications in item (2) thereof; and

              (C) if the transfer will be made pursuant to any other exemption
      from the registration requirements of the Securities Act, then the
      transferor must deliver a certificate in the form of Exhibit B hereto,
      including the certifications, certificates and Opinion of Counsel required
      by item (3) thereof, if applicable.

          (ii) Restricted Definitive Notes to Unrestricted Definitive Notes. Any
   Restricted Definitive Note may be exchanged by the Holder thereof for an
   Unrestricted Definitive Note or transferred to a Person or Persons who take
   delivery thereof in the form of an Unrestricted Definitive Note if:

              (A) such exchange or transfer is effected pursuant to the
   Exchange Offer in accordance with the Registration Rights Agreement and the
   Holder, in the case of an exchange, or the transferee, in the case of a
   transfer, certifies in the applicable Letter of Transmittal that it is not
   (1) a broker-dealer, (2) a Person participating in the distribution of the
   Exchange Notes or (3) a Person who is an affiliate (as defined in Rule 144)
   of the Company;

              (B) any such transfer is effected pursuant to the Shelf
      Registration Statement in accordance with the Registration Rights
      Agreement;

              (C) any such transfer is effected by a Broker-Dealer pursuant to
      the Exchange Offer Registration Statement in accordance with the
      Registration Rights Agreement; or

                                       31
<PAGE>
 
              (D) the Registrar receives the following:

                  (1) if the Holder of such Restricted Definitive Notes proposes
         to exchange such Notes for an Unrestricted Definitive Note, a
         certificate from such Holder in the form of Exhibit C hereto, including
         the certifications in item (1)(d) thereof; or

                  (2) if the Holder of such Restricted Definitive Notes proposes
         to transfer such Notes to a Person who shall take delivery thereof in
         the form of an Unrestricted Definitive Note, a certificate from such
         Holder in the form of Exhibit B hereto, including the certifications in
         item (4) thereof;

     and, in each such case set forth in this subparagraph (D), if the Registrar
     so requests, an Opinion of Counsel in form reasonably acceptable to the
     Company to the effect that such exchange or transfer is in compliance with
     the Securities Act and that the restrictions on transfer contained herein
     and in the Private Placement Legend are no longer required in order to
     maintain compliance with the Securities Act.

          (iii)  Unrestricted Definitive Notes to Unrestricted Definitive Notes.
   A Holder of Unrestricted Definitive Notes may transfer such Notes to a Person
   who takes delivery thereof in the form of an Unrestricted Definitive Note.
   Upon receipt of a request to register such a transfer, the Registrar shall
   register the Unrestricted Definitive Notes pursuant to the instructions from
   the Holder thereof.

     (f) Exchange Offer.  Upon the occurrence of the Exchange Offer in
accordance with the Registration Rights Agreement, the Company shall issue and,
upon receipt of an Authentication Order in accordance with Section 2.02, the
Trustee shall authenticate (i) one or more Unrestricted Global Notes in an
aggregate principal amount equal to the principal amount of the beneficial
interests in the Restricted Global Notes tendered for acceptance by Persons that
certify in the applicable Letters of Transmittal that (x) they are not broker-
dealers, (y) they are not participating in a distribution of the Exchange Notes
and (z) they are not affiliates (as defined in Rule 144) of the Company, and
accepted for exchange in the Exchange Offer and (ii) Definitive Notes in an
aggregate principal amount equal to the principal amount of the Restricted
Definitive Notes accepted for exchange in the Exchange Offer.  Concurrently with
the issuance of such Notes, the Trustee shall cause the aggregate principal
amount of the applicable Restricted Global Notes to be reduced accordingly, and
the Company shall execute and the Trustee shall authenticate and deliver to the
Persons designated by the Holders of Definitive Notes so accepted Definitive
Notes in the appropriate principal amount.

     (g) Legends.  The following legends shall appear on the face of all Global
Notes and Definitive Notes issued under this Indenture unless specifically
stated otherwise in the applicable provisions of this Indenture.

         (i)  Private Placement Legend.

                                       32
<PAGE>
 
            (A) Except as permitted by subparagraph (B) below, each Global Note
      and each Definitive Note (and all Notes issued in exchange therefor or
      substitution thereof) shall bear the legend in substantially the following
      form:

"THE SECURITY (OR ITS PREDECESSOR) EVIDENCED HEREBY WAS ORIGINALLY ISSUED IN A
TRANSACTION EXEMPT FROM REGISTRATION UNDER SECTION 5 OF THE UNITED STATES
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND THE SECURITY
EVIDENCED HEREBY MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE
ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM.  EACH
PURCHASER OF THE SECURITY EVIDENCED HEREBY IS HEREBY NOTIFIED THAT THE SELLER
MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE
SECURITIES ACT PROVIDED BY RULE 144A OR REGULATION S THEREUNDER.  THE HOLDER OF
THE SECURITY EVIDENCED HEREBY AGREES FOR THE BENEFIT OF THE COMPANY THAT (A)
SUCH SECURITY MAY BE RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (1)(a) IN
THE UNITED STATES TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED
INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A
TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (b) IN A TRANSACTION MEETING
THE REQUIREMENTS OF RULE 144 UNDER THE SECURITIES ACT, (c) OUTSIDE THE UNITED
STATES TO A NON U.S. PERSON IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE
904 UNDER THE SECURITIES ACT, (d) TO AN INSTITUTIONAL "ACCREDITED INVESTOR" AS
DEFINED IN RULE 501(A)(1), (2), (3) OR (7) OF THE SECURITIES ACT (AN
"INSTITUTIONAL ACCREDITED INVESTOR") THAT, PRIOR TO SUCH TRANSFER, FURNISHES THE
TRUSTEE A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS (THE
FORM OF WHICH CAN BE OBTAINED FROM THE TRUSTEE) AND, IF SUCH TRANSFER IS IN
RESPECT OF AN AGGREGATE PRINCIPAL AMOUNT OF SECURITIES LESS THAN $250,000, AN
OPINION OF COUNSEL THAT SUCH TRANSFER IS IN COMPLIANCE WITH THE SECURITIES ACT
OR (e) IN ACCORDANCE WITH ANOTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS
OF THE SECURITIES ACT (AND BASED UPON AN OPINION OF COUNSEL IF THE COMPANY SO
REQUESTS), (2) TO THE COMPANY OR (3) PURSUANT TO AN EFFECTIVE REGISTRATION
STATEMENT AND, IN EACH CASE, IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS
OF ANY STATE OF THE UNITED STATES OR ANY OTHER APPLICABLE JURISDICTION AND (B)
THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER
FROM IT OF THE SECURITY EVIDENCED HEREBY OF THE RESALE RESTRICTIONS SET FORTH IN
(A) ABOVE."

            (B) Notwithstanding the foregoing, any Global Note or Definitive
      Note issued pursuant to subparagraphs (b)(iv), (c)(iii), (c)(iv), (d)(ii),
      (d)(iii), (e)(ii), (e)(iii) or (f) to this Section 2.06 (and all Notes
      issued in exchange therefor or substitution thereof) shall not bear the
      Private Placement Legend.

          (ii) Global Note Legend.  Each Global Note shall bear a legend in
   substantially the following form:

                                       33
<PAGE>
 
"THIS GLOBAL NOTE IS HELD BY THE DEPOSITARY (AS DEFINED IN THE INDENTURE
GOVERNING THIS NOTE) OR ITS NOMINEE IN CUSTODY FOR THE BENEFIT OF THE BENEFICIAL
OWNERS HEREOF, AND IS NOT TRANSFERABLE TO ANY PERSON UNDER ANY CIRCUMSTANCES
EXCEPT THAT (I) THE TRUSTEE MAY MAKE SUCH NOTATIONS HEREON AS MAY BE REQUIRED
PURSUANT TO SECTION 2.07 OF THE INDENTURE, (II) THIS GLOBAL NOTE MAY BE
EXCHANGED IN WHOLE BUT NOT IN PART PURSUANT TO SECTION 2.06(a) OF THE INDENTURE,
(III) THIS GLOBAL NOTE MAY BE DELIVERED TO THE TRUSTEE FOR CANCELLATION PURSUANT
TO SECTION 2.11 OF THE INDENTURE AND (IV) THIS GLOBAL NOTE MAY BE TRANSFERRED TO
A SUCCESSOR DEPOSITARY WITH THE PRIOR WRITTEN CONSENT OF THE COMPANY."

          (iii)  Regulation S Temporary Global Note Legend.  The Regulation S
   Temporary Global Note shall bear a legend in substantially the following
   form:

"THE RIGHTS ATTACHING TO THIS REGULATION S TEMPORARY GLOBAL NOTE, AND THE
CONDITIONS AND PROCEDURES GOVERNING ITS EXCHANGE FOR CERTIFICATED NOTES, ARE AS
SPECIFIED IN THE INDENTURE (AS DEFINED HEREIN).  NEITHER THE HOLDER NOR THE
BENEFICIAL OWNERS OF THIS REGULATION S TEMPORARY GLOBAL NOTE SHALL BE ENTITLED
TO RECEIVE PAYMENT OF INTEREST HEREON."

     (h) Cancellation and/or Adjustment of Global Notes.  At such time as all
beneficial interests in a particular Global Note have been exchanged for
Definitive Notes or a particular Global Note has been redeemed, repurchased or
canceled in whole and not in part, each such Global Note shall be returned to or
retained and canceled by the Trustee in accordance with Section 2.11 hereof.  At
any time prior to such cancellation, if any beneficial interest in a Global Note
is exchanged for or transferred to a Person who will take delivery thereof in
the form of a beneficial interest in another Global Note or for Definitive
Notes, the principal amount of Notes represented by such Global Note shall be
reduced accordingly and an endorsement shall be made on such Global Note by the
Trustee or by the Depositary at the direction of the Trustee to reflect such
reduction; and if the beneficial interest is being exchanged for or transferred
to a Person who will take delivery thereof in the form of a beneficial interest
in another Global Note, such other Global Note shall be increased accordingly
and an endorsement shall be made on such Global Note by the Trustee or by the
Depositary at the direction of the Trustee to reflect such increase.

     (i)  General Provisions Relating to Transfers and Exchanges.

          (i)    To permit registrations of transfers and exchanges, the Company
   shall execute and the Trustee shall authenticate Global Notes and Definitive
   Notes upon the Company's order or at the Registrar's request.

          (ii)   No service charge shall be made to a holder of a beneficial
   interest in a Global Note or to a Holder of a Definitive Note for any
   registration of transfer or exchange, but the Company may require payment of
   a sum sufficient to cover any transfer tax or similar governmental charge
   payable in connection therewith (other than any such transfer taxes or
   similar governmental charge payable upon exchange or transfer pursuant to
   Sections 2.10, 3.06, 3.09, 4.10, 4.15 and 9.05 hereof).

                                       34
<PAGE>
 
          (iii)  The Registrar shall not be required to register the transfer of
   or exchange any Note selected for redemption in whole or in part, except the
   unredeemed portion of any Note being redeemed in part.

          (iv)   All Global Notes and Definitive Notes issued upon any
   registration of transfer or exchange of Global Notes or Definitive Notes
   shall be the valid obligations of the Company, evidencing the same debt, and
   entitled to the same benefits under this Indenture, as the Global Notes or
   Definitive Notes surrendered upon such registration of transfer or exchange.

          (v)    The Company shall not be required (A) to issue, to register the
   transfer of or to exchange any Notes during a period beginning at the opening
   of business 15 days before the day of any selection of Notes for redemption
   under Section 3.02 hereof and ending at the close of business on the day of
   selection, (B) to register the transfer of or to exchange any Note so
   selected for redemption in whole or in part, except the unredeemed portion of
   any Note being redeemed in part or (C) to register the transfer of or to
   exchange a Note between a record date and the next succeeding Interest
   Payment Date.

          (vi)   Prior to due presentment for the registration of a transfer of
   any Note, the Trustee, any Agent and the Company may deem and treat the
   Person in whose name any Note is registered as the absolute owner of such
   Note for the purpose of receiving payment of principal of and interest on
   such Notes and for all other purposes, and none of the Trustee, any Agent or
   the Company shall be affected by notice to the contrary.

          (vii)  The Trustee shall authenticate Global Notes and Definitive
   Notes in accordance with the provisions of Section 2.02 hereof.

          (viii) All certifications, certificates and Opinions of Counsel
   required to be submitted to the Registrar pursuant to this Section 2.06 to
   effect a registration of transfer or exchange may be submitted by facsimile.

Section 2.07.  Replacement Notes.

     If any mutilated Note is surrendered to the Trustee or the Company and the
Trustee receives evidence to its satisfaction of the destruction, loss or theft
of any Note, the Company shall issue and the Trustee, upon receipt of an
Authentication Order, shall authenticate a replacement Note if the Trustee's
requirements are met.  An indemnity bond must be supplied by the Holder that is
sufficient in the judgment of the Trustee and the Company to protect the
Company, the Trustee, any Agent and any authenticating agent from any loss that
any of them may suffer if a Note is replaced.  The Company may charge for its
expenses in replacing a Note.

     Every replacement Note is an additional obligation of the Company and
shall be entitled to all of the benefits of this Indenture equally and
proportionately with all other Notes duly issued hereunder.

                                       35
<PAGE>
 
Section 2.08.  Outstanding Notes.

     The Notes outstanding at any time are all the Notes authenticated by the
Trustee except for those canceled by it, those delivered to it for cancellation,
those reductions in the interest in a Global Note effected by the Trustee in
accordance with the provisions hereof, and those described in this Section as
not outstanding.  Except as set forth in Section 2.09 hereof, a Note does not
cease to be outstanding because the Company or an Affiliate of the Company holds
the Note; however, Notes held by the Company or a Subsidiary of the Company
shall not be deemed to be outstanding for purposes of Section 3.07(b) hereof.

     If a Note is replaced pursuant to Section 2.07 hereof, it ceases to be
outstanding unless the Trustee receives proof satisfactory to it that the
replaced Note is held by a bona fide purchaser.

     If the principal amount of any Note is considered paid under Section 4.01
hereof, it ceases to be outstanding and interest on it ceases to accrue.

     If the Paying Agent (other than the Company, a Subsidiary or an Affiliate
of any thereof) holds, on a redemption date or maturity date, money sufficient
to pay Notes payable on that date, then on and after that date such Notes shall
be deemed to be no longer outstanding and shall cease to accrue interest.

Section 2.09.  Treasury Notes.

     In determining whether the Holders of the required principal amount of
Notes have concurred in any direction, waiver or consent, Notes owned by the
Company, or by any Person directly or indirectly controlling or controlled by or
under direct or indirect common control with the Company, shall be considered as
though not outstanding, except that for the purposes of determining whether the
Trustee shall be protected in relying on any such direction, waiver or consent,
only Notes that the Trustee knows are so owned shall be so disregarded.

Section 2.10.  Temporary Notes.

     Until certificates representing Notes are ready for delivery, the Company
may prepare and the Trustee, upon receipt of an Authentication Order, shall
authenticate temporary Notes.  Temporary Notes shall be substantially in the
form of certificated Notes but may have variations that the Company considers
appropriate for temporary Notes and as shall be reasonably acceptable to the
Trustee.  Without unreasonable delay, the Company shall prepare and the Trustee
shall authenticate definitive Notes in exchange for temporary Notes.

     Holders of temporary Notes shall be entitled to all of the benefits of
this Indenture.

Section 2.11.  Cancellation.

     The Company at any time may deliver Notes to the Trustee for cancellation.
The Registrar and Paying Agent shall forward to the Trustee any Notes
surrendered to them for registration of transfer, exchange or payment.  The
Trustee and no one else shall cancel all Notes surrendered for registration of

                                       36
<PAGE>
 
transfer, exchange, payment, replacement or cancellation.  Certification of the
cancellation of all canceled Notes shall be delivered to the Company.  The
Company may not issue new Notes to replace Notes that it has paid or that have
been delivered to the Trustee for cancellation.

Section 2.12.  Defaulted Interest.

     If the Company defaults in a payment of interest on the Notes, it shall pay
the defaulted interest in any lawful manner plus, to the extent lawful, interest
payable on the defaulted interest, to the Persons who are Holders on a
subsequent special record date, in each case at the rate provided in the Notes
and in Section 4.01 hereof. The Company shall notify the Trustee in writing of
the amount of defaulted interest proposed to be paid on each Note and the date
of the proposed payment. The Company shall fix or cause to be fixed each such
special record date and payment date, provided that no such special record date
shall be less than 10 days prior to the related payment date for such defaulted
interest. At least 15 days before the special record date, the Company (or, upon
the written request of the Company, the Trustee in the name and at the expense
of the Company) shall mail or cause to be mailed to Holders a notice that states
the special record date, the related payment date and the amount of such
interest to be paid.

                                   ARTICLE 3
                           REDEMPTION AND PREPAYMENT

Section 3.01.  Notices to Trustee.

     If the Company elects to redeem Notes pursuant to the optional redemption
provisions of Section 3.07 hereof, it shall furnish to the Trustee, at least 30
days but not more than 60 days before a redemption date, an Officers'
Certificate setting forth (i) the clause of this Indenture pursuant to which the
redemption shall occur, (ii) the redemption date, (iii) the principal amount of
Notes to be redeemed and (iv) the redemption price.

Section 3.02.  Selection of Notes to Be Redeemed.

     If less than all of the Notes are to be redeemed or purchased in an offer
to purchase at any time, the Trustee shall select the Notes to be redeemed or
purchased among the Holders of the Notes in compliance with the requirements of
the principal national securities exchange, if any, on which the Notes are
listed or, if the Notes are not so listed, on a pro rata basis, by lot or in
accordance with any other method the Trustee considers fair and appropriate.  In
the event of partial redemption by lot, the particular Notes to be redeemed
shall be selected, unless otherwise provided herein, not less than 30 nor more
than 60 days prior to the redemption date by the Trustee from the outstanding
Notes not previously called for redemption.

     The Trustee shall promptly notify the Company in writing of the Notes
selected for redemption and, in the case of any Note selected for partial
redemption, the principal amount thereof to be redeemed.  Notes and portions of
Notes selected shall be in amounts of $1,000 or whole multiples of $1,000;
except that if all of the Notes of a Holder are to be redeemed, the entire
outstanding amount of Notes held by

                                       37
<PAGE>
 
such Holder, even if not a multiple of $1,000, shall be redeemed. Except as
provided in the preceding sentence, provisions of this Indenture that apply to
Notes called for redemption also apply to portions of Notes called for
redemption.

Section 3.03.  Notice of Redemption.

     Subject to the provisions of Section 3.09 hereof, at least 30 days but not
more than 60 days before a redemption date, the Company shall mail or cause to
be mailed, by first class mail, a notice of redemption to each Holder whose
Notes are to be redeemed at its registered address.

     The notice shall identify the Notes to be redeemed and shall state:

     (a)  the redemption date;

     (b)  the redemption price;

     (c) if any Note is being redeemed in part, the portion of the principal
amount of such Note to be redeemed and that, after the redemption date upon
surrender of such Note, a new Note or Notes in principal amount equal to the
unredeemed portion shall be issued upon cancellation of the original Note;

     (d) the name and address of the Paying Agent;

     (e) that Notes called for redemption must be surrendered to the Paying
Agent to collect the redemption price;

     (f) that, unless the Company defaults in making such redemption payment,
interest on Notes called for redemption ceases to accrue on and after the
redemption date;

     (g) the paragraph of the Notes and/or Section of this Indenture pursuant
to which the Notes called for redemption are being redeemed; and

     (h) that no representation is made as to the correctness or accuracy of
the CUSIP number, if any, listed in such notice or printed on the Notes.

     At the Company's request, the Trustee shall give the notice of redemption
in the Company's name and at its expense; provided, however, that the Company
shall have delivered to the Trustee, at least 45 days prior to the redemption
date, an Officers' Certificate requesting that the Trustee give such notice and
setting forth the information to be stated in such notice as provided in the
preceding paragraph.

     The notice mailed in the manner herein provided shall be conclusively
presumed to have been duly given whether or not the Holder receives such Notice.
In any case, failure to give such notice by mail or any defects in the notice to
any Holder shall not affect the validity of the proceeding for the redemption of
the Notes of any other Holder.

                                       38
<PAGE>
 
Section 3.04.  Effect of Notice of Redemption.

     Once notice of redemption is mailed in accordance with Section 3.03
hereof, Notes called for redemption become irrevocably due and payable on the
redemption date at the redemption price.  A notice of redemption may not be
conditional.

Section 3.05.  Deposit of Redemption Price.

     One Business Day prior to the redemption date, the Company shall deposit
with the Trustee or with the Paying Agent money sufficient to pay the redemption
price of and accrued interest on all Notes to be redeemed on that date.  The
Trustee or the Paying Agent shall promptly return to the Company any money
deposited with the Trustee or the Paying Agent by the Company in excess of the
amounts necessary to pay the redemption price of, and accrued interest on, all
Notes to be redeemed.

     If the Company complies with the provisions of the preceding paragraph, on
and after the redemption date, interest shall cease to accrue on the Notes or
the portions of Notes called for redemption.  If a Note is redeemed on or after
an interest record date but on or prior to the related interest payment date,
then any accrued and unpaid interest shall be paid to the Person in whose name
such Note was registered at the close of business on such record date.  If any
Note called for redemption shall not be so paid upon surrender for redemption
because of the failure of the Company to comply with the preceding paragraph,
interest shall be paid on the unpaid principal, from the redemption date until
such principal is paid, and to the extent lawful on any interest not paid on
such unpaid principal, in each case at the rate provided in the Notes and in
Section 4.01 hereof.

Section 3.06.  Notes Redeemed in Part.

     Upon surrender of a Note that is redeemed in part, the Company shall issue
and, upon the Company's written request, the Trustee shall authenticate for the
Holder at the expense of the Company a new Note equal in principal amount to the
unredeemed portion of the Note surrendered.

Section 3.07.    Optional Redemption.

     (a) Except as set forth in clause (b) of this Section 3.07, the Company
shall not have the option to redeem the Notes pursuant to this Section 3.07
prior to August 15, 2003.  Thereafter, the Company shall have the option to
redeem the Notes, in whole or in part, in cash at the redemption prices
(expressed as percentages of principal amount) set forth below plus accrued and
unpaid interest and Liquidated Damages thereon, if any, to the applicable
redemption date, if redeemed during the twelve-month period beginning on August
15 of the years indicated below:



Year                                          Percentage
- ----                                          ----------
2003........................................    105.625%
2004........................................    103.750%
2005........................................    101.875%
2006 and thereafter.........................    100.000%

                                       39
<PAGE>
 
     (b) Notwithstanding the provisions of clause (a) of this Section 3.07, at
any time prior to August 15, 2001, the Company may (but will not have the
obligation to) on any one or more occasions redeem up to 35% of the aggregate
principal amount of Notes originally issued at a redemption price equal to
111.250% of the principal amount thereof, plus accrued and unpaid interest and
Liquidated Damages, if any, thereon to the redemption date, with the net cash
proceeds of one or more Public Equity Offerings; provided that at least 65% of
the aggregate principal amount of Notes originally issued remain outstanding
immediately after the occurrence of such redemption (excluding Notes held by the
Company and its Subsidiaries); and provided, further, that such redemption shall
occur within 180 days of the date of the closing of such Public Equity Offering.

     (c) Any redemption pursuant to this Section 3.07 shall be made pursuant to
the provisions of Section 3.01 through 3.06 hereof.

Section 3.08.  Mandatory Redemption.
     
     The Company shall not be required to make mandatory redemption payments
with respect to the Notes.

Section 3.09.  Offer to Purchase by Application of Excess Proceeds.

     In the event that, pursuant to Section 4.10 hereof, the Company shall be
required to commence an offer to all Holders to purchase Notes (an "Asset Sale
Offer"), it shall follow the procedures specified below.

     The Asset Sale Offer shall remain open for a period of 20 Business Days
following its commencement and no longer, except to the extent that a longer
period is required by applicable law (the "Offer Period").  No later than five
Business Days after the termination of the Offer Period (the "Purchase Date"),
the Company shall purchase the principal amount of Notes required to be
purchased pursuant to Section 4.10 hereof (the "Offer Amount") or, if less than
the Offer Amount has been tendered, all Notes tendered in response to the Asset
Sale Offer. Payment for any Notes so purchased shall be made in the same manner
as interest payments are made.

     If the Purchase Date is on or after an interest record date and on or
before the related interest payment date, any accrued and unpaid interest shall
be paid to the Person in whose name a Note is registered at the close of
business on such record date, and no additional interest shall be payable to
Holders who tender Notes pursuant to the Asset Sale Offer.

     Upon the commencement of an Asset Sale Offer, the Company shall send, by
first class mail, a notice to the Trustee and each of the Holders, with a copy
to the Trustee.  The notice shall contain all instructions and materials
necessary to enable such Holders to tender Notes pursuant to the Asset Sale
Offer.  The Asset Sale Offer shall be made to all Holders.  The notice, which
shall govern the terms of the Asset Sale Offer, shall state:

     (a) that the Asset Sale Offer is being made pursuant to this Section 3.09
and Section 4.10 hereof and the length of time the Asset Sale Offer shall remain
open;

                                       40
<PAGE>
 
      (b) the Offer Amount, the purchase price and the Purchase Date;

      (c) that any Note not tendered or accepted for payment shall continue to
accrete or accrue interest;

      (d) that, unless the Company defaults in making such payment, any Note
accepted for payment pursuant to the Asset Sale Offer shall cease to accrete or
accrue interest after the Purchase Date;

      (e) that Holders electing to have a Note purchased pursuant to an Asset
Sale Offer may elect to have Notes purchased in integral multiples of $1,000
only;

      (f) that Holders electing to have a Note purchased pursuant to any Asset
Sale Offer shall be required to surrender the Note, with the form entitled
"Option of Holder to Elect Purchase" on the reverse of the Note completed, or
transfer by book-entry transfer, to the Company, a depositary, if appointed by
the Company, or a Paying Agent at the address specified in the notice at least
three days before the Purchase Date;

      (g) that Holders shall be entitled to withdraw their election if the
Company, the Depositary or the Paying Agent, as the case may be, receives, not
later than the expiration of the Offer Period, a telegram, telex, facsimile
transmission or letter setting forth the name of the Holder, the principal
amount of the Note the Holder delivered for purchase and a statement that such
Holder is withdrawing his election to have such Note purchased;

      (h) that, if the aggregate principal amount of Notes surrendered by
Holders exceeds the Offer Amount, the Company shall select the Notes to be
purchased on a pro rata basis (with such adjustments as may be deemed
appropriate by the Company so that only Notes in denominations of $1,000, or
integral multiples thereof, shall be purchased); and

      (i) that Holders whose Notes were purchased only in part shall be issued
new Notes equal in principal amount to the unpurchased portion of the Notes
surrendered (or transferred by book-entry transfer).

      On or before the Purchase Date, the Company shall, to the extent lawful,
accept for payment, on a pro rata basis to the extent necessary, the Offer
Amount of Notes or portions thereof tendered pursuant to the Asset Sale Offer,
or if less than the Offer Amount has been tendered, all Notes tendered, and
shall deliver to the Trustee an Officers' Certificate stating that such Notes or
portions thereof were accepted for payment by the Company in accordance with the
terms of this Section 3.09.  The Company, the Depositary or the Paying Agent, as
the case may be, shall promptly (but in any case not later than five days after
the Purchase Date) mail or deliver to each tendering Holder an amount equal to
the purchase price of the Notes tendered by such Holder and accepted by the
Company for purchase, and the Company shall promptly issue a new Note, and the
Trustee, upon written request from the Company shall authenticate and mail or
deliver such new Note to such Holder, in a principal amount equal to any
unpurchased portion of the Note surrendered.  Any Note not so accepted shall be
promptly mailed or delivered by the Company to the Holder thereof.  The Company
shall publicly announce the results of the Asset Sale Offer on the Purchase Date
or as soon as practicable thereafter.

                                       41
<PAGE>
 
      Other than as specifically provided in this Section 3.09, any purchase
pursuant to this Section 3.09 shall be made pursuant to the provisions of
Sections 3.01 through 3.06 hereof.

                                   ARTICLE 4
                                   COVENANTS

Section 4.01.  Payment of Notes.

      The Company shall pay or cause to be paid the principal of, premium, if
any, and interest on the Notes on the dates and in the manner provided in the
Notes.  Principal, premium, if any, and interest shall be considered paid on the
date due if the Paying Agent, if other than the Company or a Subsidiary thereof,
holds as of 10:00 a.m.  Eastern Time on the due date money deposited by the
Company in immediately available funds and designated for and sufficient to pay
all principal, premium, if any, and interest then due.  The Company shall pay
all Liquidated Damages, if any, in the same manner on the dates and in the
amounts set forth in the Registration Rights Agreement.  The Paying Agent shall
return to the Company no later than five days following the date of payment, any
money that exceeds the amount of principal, premium, if any, and interest
payable on the Notes.

      The Company shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue principal at the rate equal to
1% per annum in excess of the then applicable interest rate on the Notes to the
extent lawful; it shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue installments of interest and
Liquidated Damages (without regard to any applicable grace period) at the same
rate to the extent lawful.

Section 4.02.  Maintenance of Office or Agency.

      The Company shall maintain in the Borough of Manhattan, the City of New
York, an office or agency (which may be an office of the Trustee or an affiliate
of the Trustee, Registrar or co-registrar) where Notes may be surrendered for
registration of transfer or for exchange and where notices and demands to or
upon the Company in respect of the Notes and this Indenture may be served.  The
Company shall give prompt written notice to the Trustee of the location, and any
change in the location, of such office or agency.  If at any time the Company
shall fail to maintain any such required office or agency or shall fail to
furnish the Trustee with the address thereof, such presentations, surrenders,
notices and demands may be made or served at the Corporate Trust Office of the
Trustee.

      The Company may also from time to time designate one or more other offices
or agencies where the Notes may be presented or surrendered for any or all such
purposes and may from time to time rescind such designations; provided, however,
that no such designation or rescission shall in any manner relieve the Company
of its obligation to maintain an office or agency in the Borough of Manhattan,
the City of New York for such purposes.  The Company shall give prompt written
notice to the Trustee of any such designation or rescission and of any change in
the location of any such other office or agency.

      The Company hereby designates the Corporate Trust Office of the Trustee as
one such office or agency of the Company in accordance with Section 2.03.

                                       42
<PAGE>
 
Section 4.03.  Reports.

      (a) Whether or not required by the rules and regulations of the SEC, so
long as any Notes are outstanding, the Company shall furnish to the Holders of
Notes (i) all quarterly financial information beginning with the quarter ended
September 30, 1998 and annual financial information that would be required to be
contained in a filing with the Commission on Forms 10-Q and 10-K if the Company
was required to file such Forms, including a "Management's Discussion and
Analysis of Financial Condition and Results of Operations" that describes the
financial condition and results of operations of the Company and its
consolidated Subsidiaries (showing in reasonable detail, either on the face of
the financial statements or in the footnotes thereto and in Management's
Discussion and Analysis of Financial Condition and Results of Operations, the
financial condition and results of operations of the Company and its Restricted
Subsidiaries separate from the financial condition and results of operations of
the Unrestricted Subsidiaries of the Company) and, with respect to the annual
information only, a report thereon by the Company's certified independent
accountants and (ii) all current reports that would be required to be filed with
the SEC on Form 8-K if the Company were required to file such reports, in each
case within the time periods specified in the Commission's rules and
regulations.  In addition, following the consummation of the exchange offer
contemplated by the Registration Rights Agreement, whether or not required by
the rules and regulations of the SEC, the Company shall file a copy of all such
information and reports with the SEC for public availability within the time
periods specified in the SEC's rules and regulations (unless the SEC will not
accept such a filing) and make such information available to securities analysts
and prospective investors upon request.

      (b) For so long as any Notes remain outstanding, (i) at all times the SEC
does not accept the filings provided for in Section 4.03(a) hereof or (ii) such
filings provided for in Section 4.03(a) hereof do not contain the information
required to be delivered upon request pursuant to Rule 144A(d)(4) under the
Securities Act, then, in each case, the Company shall agree to furnish to the
Holders and to securities analysts and prospective investors, upon their
request, the information required to be delivered pursuant to Rule 144A(d)(4)
under the Securities Act.

Section 4.04.  Compliance Certificate.

      (a) The Company and each Subsidiary Guarantor (to the extent that such
Subsidiary Guarantor is so required under the TIA) shall deliver to the Trustee,
within 90 days after the end of each fiscal year, an Officers' Certificate
stating that a review of the activities of the Company and its Subsidiaries
during the preceding fiscal year has been made under the supervision of the
signing Officers with a view to determining whether the Company has kept,
observed, performed and fulfilled its obligations under this Indenture, and
further stating, as to each such Officer signing such certificate, that to the
best of his or her knowledge the Company has kept, observed, performed and
fulfilled each and every covenant contained in this Indenture and is not in
default in the performance or observance of any of the terms, provisions and
conditions of this Indenture or the Pledge Agreement (or, if a Default or Event
of Default shall have occurred, describing all such Defaults or Events of
Default of which he or she may have knowledge and what action the Company is
taking or proposes to take with respect thereto) and that to the best of his or
her knowledge no event has occurred and remains in existence by reason of which
payments on account of the principal of or interest, if any, on the Notes is
prohibited or if such 

                                       43
<PAGE>
 
event has occurred, a description of the event and what action the Company is
taking or proposes to take with respect thereto.

      (b) So long as not contrary to the then current recommendations of the
American Institute of Certified Public Accountants, the Company shall use its
best efforts to obtain a written statement to accompany the year-end financial
statements delivered pursuant to Section 4.03(a) of the Company's independent
public accountants (who shall be a firm of established national reputation) that
in making the examination necessary for certification of such financial
statements, nothing has come to their attention that would lead them to believe
that the Company has violated any provisions of Article 4 or Article 5 hereof
or, if any such violation has occurred, specifying the nature and period of
existence thereof, it being understood that such accountants shall not be liable
directly or indirectly to any Person for any failure to obtain knowledge of any
such violation.

      (c) The Company shall, so long as any of the Notes are outstanding,
deliver to the Trustee, forthwith upon any Officer becoming aware of any Default
or Event of Default, an Officers' Certificate specifying such Default or Event
of Default and what action the Company is taking or proposes to take with
respect thereto.

Section 4.05.  Taxes.

      The Company shall pay, and shall cause each of its Subsidiaries to pay,
prior to delinquency, all material taxes, assessments, and governmental levies
except such as are contested in good faith and by appropriate proceedings or
where the failure to effect such payment is not adverse in any material respect
to the Holders of the Notes.

Section 4.06.  Stay, Extension and Usury Laws.

      The Company and each of the Subsidiary Guarantors covenants (to the extent
that it may lawfully do so) that it shall not at any time insist upon, plead, or
in any manner whatsoever claim or take the benefit or advantage of, any stay,
extension or usury law wherever enacted, now or at any time hereafter in force,
that may affect the covenants or the performance of this Indenture; and the
Company and each of the Subsidiary Guarantors (to the extent that it may
lawfully do so) hereby expressly waives all benefit or advantage of any such
law, and covenants that it shall not, by resort to any such law, hinder, delay
or impede the execution of any power herein granted to the Trustee, but shall
suffer and permit the execution of every such power as though no such law has
been enacted.

Section 4.07.  Restricted Payments.

      The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, directly or indirectly: (i) declare or pay any dividend or make
any other payment or distribution on account of the Company's or any of its
Restricted Subsidiaries' Equity Interests (including, without limitation, any
payment in connection with any merger or consolidation involving the Company or
any of its Restricted Subsidiaries) or to the direct or indirect holders of the
Company's or any of its Restricted Subsidiaries' Equity Interests in their
capacity as such (other than, in each case, dividends or distributions payable
in Equity Interests (other than Disqualified Stock) of the Company or dividends
or distributions payable to 

                                       44
<PAGE>
 
the Company or a Restricted Subsidiary of the Company); (ii) purchase, redeem or
otherwise acquire or retire for value (including, without limitation, in
connection with any merger or consolidation involving the Company) any Equity
Interests of the Company (other than Equity Interests owned by the Company or
any Restricted Subsidiary of the Company) or any direct or indirect parent of
the Company; (iii) make any payment on or with respect to, or purchase, redeem,
defease or otherwise acquire or retire for value any Indebtedness that is
subordinated to the Notes (other than any subordinated indebtedness held by the
Company or any Subsidiary Guarantor), except a payment of interest or principal
at Stated Maturity; or (iv) make any Restricted Investment (all such payments
and other actions set forth in clauses (i) through (iv) above being collectively
referred to as "Restricted Payments"), unless:

         (a) at the time of and after giving effect to such Restricted Payment,
   no Default or Event of Default shall have occurred and be continuing or would
   occur as a consequence thereof; and

         (b) the Company would, at the time of such Restricted Payment and after
   giving pro forma effect thereto as if such Restricted Payment had been made
   at the beginning of the applicable four-quarter period, have been permitted
   to incur at least $1.00 of additional Indebtedness pursuant to the Fixed
   Charge Coverage Ratio test set forth in the first paragraph of Section 4.09
   hereof; and

         (c) such Restricted Payment, together with the aggregate amount of all
   other Restricted Payments made by the Company and its Restricted Subsidiaries
   after the date of this Indenture (excluding Restricted Payments permitted by
   clauses (ii), (iii), (iv), (viii), (ix) and (xi) of the next succeeding
   paragraph), is less than the sum, without duplication, of (i) 50% of the
   Consolidated Net Income of the Company for the period (taken as one
   accounting period) from the beginning of the first fiscal quarter commencing
   after the date of this Indenture to the end of the Company's most recently
   ended fiscal quarter for which internal financial statements are available at
   the time of such Restricted Payment (or, if such Consolidated Net Income for
   such period is a deficit, less 100% of such deficit), plus (ii) 100% of the
   aggregate fair market value of Qualified Proceeds received by the Company
   since the date of this Indenture as a contribution to its equity capital or
   from the issue or sale of Equity Interests of the Company (other than
   Disqualified Stock) or from the issue or sale of Disqualified Stock or debt
   securities of the Company that have been converted into such Equity Interests
   (other than Equity Interests (or Disqualified Stock or convertible debt
   securities) sold to a Subsidiary of the Company), plus (iii) to the extent
   that any Restricted Investment that was made after the date of this Indenture
   is sold for cash or otherwise liquidated or repaid for Qualified Proceeds,
   the lesser of (A) the fair market of the Qualified Proceeds received with
   respect to such Restricted Investment (less the cost of disposition, if any)
   and (B) the initial amount of such Restricted Investment, plus (iv) 50% of
   any dividends received by the Company or a Wholly Owned Restricted Subsidiary
   after the date of this Indenture from an Unrestricted Subsidiary of the
   Company, to the extent that such dividends were not otherwise included in
   Consolidated Net Income of the Company for such period, plus (v) to the
   extent that any Unrestricted Subsidiary is redesignated as a Restricted
   Subsidiary after the date of this Indenture, the lesser of (A) the fair
   market value of the Company's Investment in such Subsidiary as of the date of
   such redesignation or (B) such fair market value as of the date on which such
   Subsidiary was originally designated as an Unrestricted Subsidiary.

                                       45
<PAGE>
 
      The foregoing provisions shall not prohibit: (i) the payment of any
dividend within 60 days after the date of declaration thereof, if at said date
of declaration such payment would have complied with the provisions hereof; (ii)
the redemption, repurchase, retirement, defeasance or other acquisition of any
subordinated Indebtedness or Equity Interests of the Company or any Subsidiary
Guarantor, in each case, in exchange for, or out of the net cash proceeds of the
substantially concurrent sale (other than to a Subsidiary of the Company) of,
other Equity Interests of the Company (other than any Disqualified Stock) or the
net cash proceeds of a common equity capital contribution to the Company;
provided that the amount of any such net cash proceeds that are utilized for any
such redemption, repurchase, retirement, defeasance or other acquisition shall
be excluded from clause (c)(ii) of the preceding paragraph; (iii) the
defeasance, redemption, repurchase or other acquisition of subordinated
Indebtedness with the net cash proceeds from an incurrence of Permitted
Refinancing Indebtedness; (iv) the payment of any dividend or making of any
distribution by a Subsidiary of the Company to the holders of its Equity
Interests on a pro rata basis; (v) the repurchase, redemption or other
acquisition or retirement for value of any Equity Interests of the Company or
any Subsidiary of the Company held by any former member of the Company's (or any
of their Subsidiaries') Board of Directors or any former officer, employee or
director of the Company or any of its Restricted Subsidiaries pursuant to any
equity subscription agreement, stockholder agreement, stock option agreement,
employment agreement or other similar agreements or employee benefit plan;
provided that (A) the aggregate price paid for all such repurchased, redeemed,
acquired or retired Equity Interests shall not exceed (1) $2.0 million in any
calendar year (with unused amounts in any calendar year being carried over to
succeeding calendar years subject to a maximum (without giving effect to clause
(2)) of $5.0 million, plus (2) in the case of a repurchase, redemption or other
acquisition or retirement of Equity Interests of the Company, the aggregate cash
proceeds received by the Company during such calendar year from any reissuance
of Equity Interests by or the Company to employees, officers and directors of
the Company and its Restricted Subsidiaries plus the cash proceeds of any "key
man" life insurance policy received by the Company with respect to the owner of,
and any cash proceeds paid to the Company in connection with the issuance or
exercise of, any management or employee Equity Interests so acquired plus (3) in
the case of a repurchase, redemption or other acquisition or retirement of
Equity Interests of a Subsidiary Guarantor, the aggregate cash proceeds received
by such Subsidiary Guarantor during such calendar year from any reissuance of
Equity Interests of such Subsidiary Guarantor to employees, officers, and
directors of such Subsidiary Guarantor plus the cash proceeds of any "key man"
life insurance policy received by such Subsidiary Guarantor with respect to the
owner of any cash proceeds paid to such Subsidiary Guarantor in connection with
the issuance or exercise of, any management or employee Equity Interests so
acquired, and (B) no Default or Event of Default shall have occurred and be
continuing immediately after such transaction; provided, further that the
aggregate cash proceeds referred to in (2) above shall be excluded from clause
(c)(ii) of the preceding paragraph; (vi) any Investment to the extent that the
consideration therefor consists of the net cash proceeds of the substantially
concurrent issue and sale (other than to a Restricted Subsidiary) of Equity
Interests of the Company (other than any Disqualified Stock); (vii) so long as
no Default or Event of Default has occurred and is continuing and the Company
can incur at least $1.00 of additional indebtedness pursuant to the Fixed Charge
Coverage Ratio test set forth in the first paragraph of Section 4.09 hereof, the
declaration and payment of dividends to holders of any class or series of
Disqualified Stock of the Company, or any Subsidiary Guarantor issued after the
date of this Indenture in accordance with Section 4.09 hereof; (viii) repurchase
of Equity Interests deemed to occur upon exercise of stock options if such
Equity Interests represent a portion of the exercise price of such options; (ix)
loans to employees of the 

                                       46
<PAGE>
 
Company or any Subsidiary Guarantor not to exceed $2.0 million at any one time
outstanding; (x) Restricted Payments not to exceed $5.0 million since the date
of this Indenture and (xi) payments made pursuant to the Merger Agreement and
tax "gross up" payments made pursuant to the Stockholders Agreement in
connection with the Recapitalization, in each case, as in effect on the date of
this Indenture, as the same may be amended, modified or replaced from time to
time so long as such amendment, modification or replacement does not increase
the amount of any such payments from the amount of such payments provided for in
the Merger Agreement or Stockholders Agreement, as the case may be, as in effect
on the date of this Indenture.

      The Board of Directors may designate any Restricted Subsidiary to be an
Unrestricted Subsidiary if such designation would not cause a Default.  For
purposes of making such determination, all outstanding Investments by the
Company and its Restricted Subsidiaries (except to the extent repaid in cash) in
the Subsidiary so designated will be deemed to be Restricted Payments at the
time of such designation and will reduce the amount available for Restricted
Payments under the first paragraph of this Section 4.07.  All such outstanding
Investments will be deemed to constitute Investments in an amount equal to the
fair market value of such Investments at the time of such designation.  Such
designation will only be permitted if such Restricted Payment would be permitted
at such time and if such Restricted Subsidiary otherwise meets the definition of
an Unrestricted Subsidiary.

      For purposes of determining compliance with this Section 4.07, in the
event that a Restricted Payment meets the criteria of more than one of the
exceptions described in (i) through (xi) above or is entitled to be made
pursuant to the first paragraph of this Section 4.07, the Company shall, in its
sole discretion, classify such Restricted Payment in any manner that complies
with this Section 4.07.  The amount of all Restricted Payments (other than cash)
shall be the fair market value on the date of the Restricted Payment of the
asset(s) or securities proposed to be transferred or issued by the Company or
such Subsidiary, as the case may be, pursuant to the Restricted Payment.  The
fair market value of any non-cash Restricted Payment shall be determined by the
Board of Directors whose resolution with respect thereto shall be delivered to
the Trustee, such determination to be based upon an opinion or appraisal issued
by an accounting, appraisal or investment banking firm of national standing if
such fair market value exceeds $7.5 million. Not later than the date of making
any Restricted Payment, the Company shall deliver to the Trustee an Officers'
Certificate stating that such Restricted Payment is permitted and setting forth
the basis upon which the calculations required by this Section 4.07 were
computed, together with a copy of any fairness opinion or appraisal required by
this Indenture.

Section 4.08.  Dividend and Other Payment Restrictions Affecting Subsidiaries.

      The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, directly or indirectly, create or otherwise cause or suffer to
exist or become effective any encumbrance or restriction on the ability of any
Restricted Subsidiary to (i)(a) pay dividends or make any other distributions to
the Company or any of its Restricted Subsidiaries (1) on its Capital Stock or
(2) with respect to any other interest or participation in, or measured by, its
profits, or (b) pay any indebtedness owed to the Company or any of its
Restricted Subsidiaries, (ii) make loans or advances to the Company or any of
its Restricted Subsidiaries or (iii) transfer any of its properties or assets to
the Company or any of its Restricted Subsidiaries.  However, the foregoing
restrictions will not apply to encumbrances or restrictions existing under or by
reason of (a) Existing Indebtedness as in effect on the date of this Indenture,
(b) the New 

                                       47
<PAGE>
 
Credit Facility and Permitted Bonding Obligations as in effect as of the date of
this Indenture, and any amendments, modifications, restatements, renewals,
increases, supplements, refundings, replacements or refinancings thereof,
provided that such amendments, modifications, restatements, renewals, increases,
supplements, refundings, replacement or refinancings are not materially more
restrictive, taken as a whole, with respect to such dividend and other payment
restrictions than those contained in the New Credit Facility or in agreements
with respect to Permitted Bonding Obligations, as applicable, as in effect on
the date of this Indenture, (c) this Indenture, the Notes and the Subsidiary
Guarantees, (d) applicable law, (e) any instrument governing Indebtedness or
Capital Stock of a Person acquired by the Company or any of its Restricted
Subsidiaries as in effect at the time of such acquisition (except to the extent
such Indebtedness was incurred in connection with or in contemplation of such
acquisition), which encumbrance or restriction is not applicable to any Person,
or the properties or assets of any Person, other than the Person, or the
property or assets of the Person, so acquired, provided that, in the case of
Indebtedness, such Indebtedness was permitted by the terms hereof to be
incurred, (f) customary non-assignment provisions in leases or other similar
agreements entered into in the ordinary course of business and consistent with
past practices, (g) purchase money obligations for property acquired in the
ordinary course of business that impose restrictions of the nature described in
clause (iii) above on the property so acquired, (h) any agreement for the sale
of a Restricted Subsidiary that restricts distributions by that Restricted
Subsidiary pending its sale, (i) Permitted Refinancing Indebtedness, provided
that the restrictions contained in the agreements governing such Permitted
Refinancing Indebtedness are not materially more restrictive, taken as a whole,
than those contained in the agreements governing the Indebtedness being
refinanced, (j) secured Indebtedness otherwise permitted to be incurred pursuant
to the provisions of Section 4.12 hereof that limits the right of the debtor to
dispose of the assets securing such Indebtedness, (k) provisions with respect to
the disposition or distribution of assets or property in joint venture
agreements and other similar agreements entered into in the ordinary course of
business, (l) restrictions on cash or other deposits or net worth imposed by
customers under contracts entered into in the ordinary course of business, (m)
mortgage or construction financing that imposes restrictions on the transfer of
the property acquired or improved, (n) encumbrances or restrictions imposed by
amendments to the contracts, agreements or obligations referred to in the
foregoing clauses (a), (c), (e), (f), (g), (h), (j), (k) and (n), provided that
such amendments are not materially more restrictive than the agreement so
amended; and (o) protective liens filed in connection with sale-leaseback
transactions permitted under Section 4.17 hereof.

Section 4.09.  Incurrence of Indebtedness and Issuance of Disqualified Stock.

      The Company shall not, and shall not permit any of its Subsidiaries to,
directly or indirectly, create, incur, issue, assume, guarantee or otherwise
become directly or indirectly liable, contingently or otherwise, with respect to
(collectively, "incur") any Indebtedness (including Acquired Debt) and that the
Company will not issue any Disqualified Stock and will not permit any of its
Subsidiaries to issue any shares of preferred stock; provided, however, that the
Company may incur Indebtedness (including Acquired Debt) or issue shares of
Disqualified Stock and the Company's Subsidiaries may incur Indebtedness or
issue preferred equity if the Fixed Charge Coverage Ratio for the Company's most
recently ended four full fiscal quarters for which internal financial statements
are available immediately preceding the date on which such additional
Indebtedness is incurred or such Disqualified Stock is issued would have been at
least 2.0 to 1, determined on a pro forma basis (including a pro forma
application of 

                                       48
<PAGE>
 
the net proceeds therefrom), as if the additional Indebtedness had been
incurred, or the Disqualified Stock had been issued, as the case may be, at the
beginning of such four-quarter period.

      The provisions of the first paragraph of this Section 4.09 shall not apply
to the incurrence of any of the following items of Indebtedness (collectively,
"Permitted Debt"):

         (i)    the incurrence by the Company and the Subsidiary Guarantors of
   term Indebtedness under the New Credit Facility (including any guarantee
   thereof by any Subsidiary Guarantor); provided that the aggregate principal
   amount of all term Indebtedness outstanding under the New Credit Facility
   after giving effect to such incurrence does not exceed an amount equal to
   $55.0 million plus (in the case of any refinancing thereof) the aggregate
   amount of fees, underwriting discounts, premiums and other costs and expenses
   incurred in connection with such refinancing less the aggregate amount of all
   scheduled or mandatory repayments of the principal of any term Indebtedness
   under the New Credit Facility (other than repayments that are immediately
   reborrowed) that have been made since the date hereof;

         (ii)   the incurrence by the Company and the Subsidiary Guarantors of
   Indebtedness and reimbursement obligations in respect of letters of credit
   under Credit Facilities (including any guarantee thereof by any Subsidiary
   Guarantor); provided that the aggregate principal amount of all revolving
   credit or other Indebtedness (other than term Indebtedness permitted under
   clause (i) above) (with letters of credit being deemed to have a principal
   amount equal to the maximum face amount thereunder) outstanding under all
   Credit Facilities after giving effect to such incurrence does not exceed an
   amount equal to $55.0 million;

         (iii)  the incurrence by the Company and its Restricted Subsidiaries of
   the Existing Indebtedness;

         (iv)   the incurrence by the Company of Indebtedness represented by the
   Notes sold in the Offering and the incurrence by the Subsidiary Guarantors of
   Indebtedness represented by the Subsidiary Guarantees of such Notes;

         (v)    the incurrence by the Company or any of its Restricted
   Subsidiaries of Indebtedness represented by Capital Lease Obligations,
   mortgage or construction financings or purchase money obligations or similar
   financings, in each case incurred for the purpose of financing all or any
   part of the purchase price or cost of construction or improvement of
   property, plant or equipment used in the business of the Company or such
   Restricted Subsidiary, in an aggregate principal amount not to exceed $20.0
   million at any time outstanding;

         (vi)   the incurrence by the Company or any of its Restricted
   Subsidiaries of Permitted Refinancing Indebtedness in exchange for, or the
   net proceeds of which are used to refund, refinance or replace Indebtedness
   (other than intercompany Indebtedness) that was permitted by this Indenture
   to be incurred under the first paragraph of this Section 4.09 or clauses
   (iii), (iv), (v), (vi) or (ix) of this Section 4.09;

                                       49
<PAGE>
 
         (vii)  the incurrence by the Company or any of its Restricted
   Subsidiaries of intercompany Indebtedness between or among the Company and
   any of its Restricted Subsidiaries; provided, however, that (i) if the
   Company is the obligor on such Indebtedness, such Indebtedness is expressly
   subordinated to the prior payment in full in cash of all Obligations with
   respect to the Notes and (ii)(A) any subsequent issuance or transfer of
   Equity Interests that results in any such Indebtedness being held by a Person
   other than the Company or a Restricted Subsidiary thereof and (B) any sale or
   other transfer of any such Indebtedness to a Person that is not either the
   Company or a Restricted Subsidiary thereof shall be deemed, in each case, to
   constitute an incurrence of such Indebtedness by the Company or such
   Restricted Subsidiary, as the case may be, that was not permitted by this
   clause (vii);

         (viii) the incurrence by the Company or any of its Restricted
   Subsidiaries of Hedging Obligations that are incurred for the purpose of
   fixing or hedging (i) interest rate risk with respect to any floating rate
   Indebtedness that is permitted by the terms of this Indenture to be
   outstanding, (ii) the value of foreign currencies purchased or received by
   the Company or any Restricted Subsidiary in the ordinary course of business
   as conducted by the Company or (iii) commodity risk relating to commodity
   agreements to the extent entered into in the ordinary course of business
   solely to protect the Company and its Restricted Subsidiaries from
   fluctuations in the prices of raw materials used in its business;

         (ix)   the incurrence by the Company or any of its Restricted
   Subsidiaries of Indebtedness (in addition to Indebtedness permitted by other
   clauses of this Section 4.09) in an aggregate principal amount (or accreted
   value, as applicable) at any time outstanding, including all Permitted
   Refinancing Indebtedness incurred to refund, refinance or replace any
   Indebtedness incurred pursuant to this clause (ix), not to exceed $25.0
   million;

         (x)    the incurrence by the Company's Unrestricted Subsidiaries of 
   Non-Recourse Debt, provided, however, that if any such Indebtedness ceases to
   be Non-Recourse Debt of an Unrestricted Subsidiary, such event shall be
   deemed to constitute an incurrence of Indebtedness by a Restricted Subsidiary
   of the Company that was not permitted by this clause (x);

         (xi)   the Guarantee by the Company or any of the Subsidiary Guarantors
   of Indebtedness of the Company or a Subsidiary Guarantor, which Indebtedness
   was permitted to be incurred by another provision of this Section 4.09;

         (xii)  Indebtedness of the Company or a Restricted Subsidiary owed to
   (including obligations in respect of letters of credit for the benefit of)
   any Person in connection with worker's compensation, health, disability or
   other employee benefits or property, casualty or liability insurance provided
   by such Person to the Company or such Restricted Subsidiary, pursuant to
   reimbursement or indemnification obligations to such Person, in each case
   incurred in the ordinary course of business and consistent with past
   practices;

         (xiii) the incurrence of Permitted Bonding Obligations;

                                       50
<PAGE>
 
         (xiv) the issuance of preferred stock (other than Disqualified Stock)
   by any Subsidiary Guarantor to members of management of such Subsidiary
   Guarantor, provided that such preferred stock does not require the Company or
   any Restricted Subsidiary to pay dividends thereon other than in shares of
   additional preferred stock (other than Disqualified Stock); and

         (xv)  the incurrence of Indebtedness arising from agreements of the
   Company or any Restricted Subsidiary providing for indemnification,
   adjustment of purchase price or similar obligations, in each case, incurred
   or assumed in connection with the disposition of any business, assets or
   Capital Stock of a Restricted Subsidiary; provided that the maximum aggregate
   liability of such Indebtedness shall at no time exceed the gross proceeds
   actually received by the Company and its Restricted Subsidiaries in
   connection with any such disposition.

      For purposes of determining compliance with this Section 4.09, in the
event that an item of Indebtedness meets the criteria of more than one of the
categories of Permitted Debt described in clauses (i) through (xv) above or is
entitled to be incurred pursuant to the first paragraph of this Section 4.09,
the Company shall, in its sole discretion, classify such item of Indebtedness in
any manner that complies with this Section 4.09.  Accrual of interest, accretion
or amortization of original issue discount, the payment of interest on any
Indebtedness in the form of additional Indebtedness with the same terms, and the
payment of dividends on Disqualified Stock in the form of additional shares of
the same class of Disqualified Stock shall not be deemed to be an incurrence of
Indebtedness or an issuance of Disqualified Stock for purposes of this Section
4.09; provided, in each such case, that the amount thereof is included in Fixed
Charges of the Company as accrued.

Section 4.10.  Asset Sales.

      The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, consummate an Asset Sale unless (i) the Company (or the
Restricted Subsidiary, as the case may be) receives consideration at the time of
such Asset Sale at least equal to the fair market value (evidenced by a
resolution of the Board of Directors set forth in an Officers' Certificate
delivered to the Trustee) of the assets or Equity Interests issued or sold or
otherwise disposed of and (ii) at least 75% of the consideration therefor
received by the Company or such Restricted Subsidiary is in the form of
Qualified Proceeds; provided that the aggregate fair market value of Qualified
Proceeds (other than cash or Cash Equivalents), which may be received in
consideration for asset sales pursuant to this clause (ii) shall not exceed $5.0
million since the date of this Indenture; provided further that the amount of
(x) any liabilities (as shown on the Company's or such Restricted Subsidiary's
most recent balance sheet), of the Company or any Restricted Subsidiary (other
than contingent liabilities and liabilities that are by their terms subordinated
to the Notes or any guarantee thereof) that are assumed by the transferee of any
such assets pursuant to a customary novation agreement that releases the Company
or such Restricted Subsidiary from further liability and (y) any securities,
Notes or other obligations received by the Company or any such Restricted
Subsidiary from such transferee that are converted by the Company or such
Restricted Subsidiary into cash (to the extent of the cash received) within 90
days following the closing of such Asset Sale, shall be deemed to be cash for
purposes of this provision, provided further that the 75% limitation referred to
above shall not apply to any Asset Sale in which the cash and Cash Equivalents
portion of the consideration received therefor, determined in accordance with
the foregoing 

                                       51
<PAGE>
 
proviso, is equal to or greater than what the net after-tax proceeds would have
been had such Asset Sale complied with the aforementioned 75% limitation.

      Within 360 days after the receipt of any Net Proceeds from an Asset Sale,
the Company or any Restricted Subsidiary may apply such Net Proceeds, at its
option, (a) to repay Senior Debt, (b) to the acquisition of a majority of the
assets of, or a majority of the Voting Stock of, another Permitted Business, the
making of a capital expenditure or the acquisition or commitment to acquire
(provided that such commitment or a reasonable replacement thereof is
consummated substantially in accordance with the terms thereof) of other assets
that are used or useful in a Permitted Business or (c) for a combination of uses
described in clauses (a) and (b).  Pending the final application of any such Net
Proceeds, the Company and its Restricted Subsidiaries may temporarily reduce
revolving credit borrowings or otherwise invest such Net Proceeds in any manner
that is not prohibited by this Indenture.  Any Net Proceeds from Asset Sales
that are not applied or invested as provided in the first sentence of this
Section 4.10 shall be deemed to constitute "Excess Proceeds."  Within five days
of each date on which the aggregate amount of Excess Proceeds exceeds $10.0
million, the Company shall make an Asset Sale Offer to purchase the maximum
principal amount of Notes that may be purchased out of the Excess Proceeds, at
an offer price in cash in an amount equal to 100% of the principal amount
thereof plus accrued and unpaid interest and Liquidated Damages thereon, if any,
to the date of repurchase, in accordance with the procedures set forth in
Section 3.09 hereof.  To the extent that any Excess Proceeds remain after
consummation of an Asset Sale Offer, the Company may use such Excess Proceeds
for any general corporate purpose.  If the aggregate principal amount of Notes
tendered into such Asset Sale Offer surrendered by Holders thereof exceeds the
amount of Excess Proceeds, the Trustee shall select the Notes to be purchased on
a pro rata basis.  Upon completion of each Asset Sale Offer, the amount of
Excess Proceeds shall be reset to zero.

Section 4.11.  Transactions with Affiliates.

      The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, make any payment to, or sell, lease, transfer or otherwise
dispose of any of its properties or assets to, or purchase any property or
assets from, or enter into or make or amend any transaction, contract,
agreement, understanding, loan, advance or guarantee with, or for the benefit
of, any Affiliate (each of the foregoing, an "Affiliate Transaction"), unless
(i) such Affiliate Transaction is on terms that are no less favorable to the
Company or the relevant Restricted Subsidiary than those that would have been
obtained in a comparable transaction by the Company or such Restricted
Subsidiary with an unrelated Person and (ii) the Company delivers to the Trustee
(a) with respect to any Affiliate Transaction or series of related Affiliate
Transactions involving aggregate consideration in excess of $2.0 million, a
resolution of the Board of Directors of the Company set forth in an Officers'
Certificate certifying that such Affiliate Transaction complies with clause (i)
above and that such Affiliate Transaction has been approved by a majority of the
disinterested members of the Board of Directors of the Company and (b) with
respect to any Affiliate Transaction or series of related Affiliate Transactions
involving aggregate consideration in excess of $7.5 million, an opinion as to
the fairness to the Holders of such Affiliate Transaction from a financial point
of view issued by an accounting, appraisal or investment banking firm of
national standing.  Notwithstanding the foregoing, the following items shall not
be deemed to be Affiliate Transactions: (i) any employment agreement,
compensation, employee benefit arrangements and incentive arrangements or
indemnification agreement or arrangement with any officer, director, member 

                                       52
<PAGE>
 
or employee entered into by the Company or any of its Restricted Subsidiaries in
the ordinary course of business of the Company or such Restricted Subsidiary,
(ii) transactions between or among the Company and/or its Restricted
Subsidiaries, (iii) payment of reasonable directors fees, (iv) Restricted
Payments (other than Restricted Investments) that are permitted by the
provisions of Section 4.07 hereof, (v) loans and advances to officers, directors
and employees of the Company or any Restricted Subsidiary for travel,
entertainment, moving and other relocation expenses, in each case made in the
ordinary course of business; and (vi) transactions pursuant to the Stockholders'
Agreement and the Merger Agreement, in each case, as in effect on the date of
this Indenture as the same may be amended, modified or replaced from time to
time so long as such amendment, modification or replacement is no less favorable
to the Company and its Restricted Subsidiaries, taken as a whole, than the
Stockholders' Agreement or the Merger Agreement, as the case may be, as in
effect on the date of this Indenture.

Section 4.12.  Liens.

      The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, directly or indirectly, create, incur, assume or suffer to
exist any Lien securing Indebtedness or trade payables on any asset now owned or
hereafter acquired, or any income or profits therefrom or assign or convey any
right to receive income therefrom, except (i) Permitted Liens, and (ii) in the
case of Liens securing Indebtedness that is expressly subordinate or junior in
right of payment to the Notes, the Notes are secured by a Lien on such property,
assets or proceeds that is senior in priority to such Liens (with the same
relative priority as such subordinate or junior Indebtedness shall have with
respect to the Notes and the Subsidiary Guarantees) and (y) in all other cases,
the Notes are secured by such Lien on an equal and ratable basis.

Section 4.13.  Business Activities.

      The Company shall not, and shall not permit any Restricted Subsidiary to,
engage in any business other than Permitted Businesses, except to such extent as
would not be material to the Company and its Restricted Subsidiaries taken as a
whole.

Section 4.14.  Corporate Existence.

      Subject to Article 5 hereof, the Company shall do or cause to be done all
things necessary to preserve and keep in full force and effect (i) its corporate
existence, and the corporate, partnership or other existence of each of its
Restricted Subsidiaries, in accordance with the respective organizational
documents (as the same may be amended from time to time) of the Company or any
such Restricted Subsidiary and (ii) the rights (charter and statutory), licenses
and franchises of the Company and its Restricted Subsidiaries; provided,
however, that the Company shall not be required to preserve any such right,
license or franchise, or the corporate, partnership or other existence of any of
its Restricted Subsidiaries, if the Board of Directors shall determine that the
preservation thereof is no longer desirable in the conduct of the business of
the Company and its Restricted Subsidiaries, taken as a whole, and that the loss
thereof is not adverse in any material respect to the Company and its Restricted
Subsidiaries taken as a whole.

                                       53
<PAGE>
 
Section 4.15.  Offer to Repurchase Upon Change of Control.

      (a) Upon the occurrence of a Change of Control, the Company shall make an
offer (a "Change of Control Offer") to each Holder to repurchase all or any part
(equal to $1,000 or an integral multiple thereof) of each Holder's Notes at a
purchase price equal to 101% of the aggregate principal amount thereof plus
accrued and unpaid interest and Liquidated Damages thereon, if any, to the date
of purchase (the "Change of Control Payment").  Within 30 days following any
Change of Control, the Company shall mail a notice to each Holder stating: (1)
that the Change of Control Offer is being made pursuant to this Section 4.15 and
that all Notes tendered will be accepted for payment; (2) the purchase price and
the purchase date, which shall be no earlier than 30 days and no later than 60
days from the date such notice is mailed (the "Change of Control Payment Date");
(3) that any Note not tendered will continue to accrue interest; (4) that,
unless the Company defaults in the payment of the Change of Control Payment, all
Notes accepted for payment pursuant to the Change of Control Offer shall cease
to accrue interest after the Change of Control Payment Date; (5) that Holders
electing to have any Notes purchased pursuant to a Change of Control Offer will
be required to surrender the Notes, with the form entitled "Option of Holder to
Elect Purchase" on the reverse of the Notes completed, to the Paying Agent at
the address specified in the notice prior to the close of business on the third
Business Day preceding the Change of Control Payment Date; (6) that Holders will
be entitled to withdraw their election if the Paying Agent receives, not later
than the close of business on the second Business Day preceding the Change of
Control Payment Date, a facsimile transmission or letter setting forth the name
of the Holder, the principal amount of Notes delivered for purchase, and a
statement that such Holder is withdrawing his election to have the Notes
purchased; and (7) that Holders whose Notes are being purchased only in part
will be issued new Notes equal in principal amount to the unpurchased portion of
the Notes surrendered, which unpurchased portion must be equal to $1,000 in
principal amount or an integral multiple thereof.  The Company shall comply with
the requirements of Rule 14e-1 under the Exchange Act and any other securities
laws and regulations thereunder to the extent such laws and regulations are
applicable in connection with the repurchase of Notes in connection with a
Change of Control.  To the extent that the provisions of any securities laws or
regulations directly conflict with the provisions hereof, the Company shall
comply with the applicable securities laws and regulations and shall not be
deemed to have breached its obligations described herein by virtue thereof.

      (b) On the Change of Control Payment Date, the Company shall, to the
extent lawful, (1) accept for payment all Notes or portions thereof properly
tendered pursuant to the Change of Control Offer, (2) deposit with the Paying
Agent an amount equal to the Change of Control Payment in respect of all Notes
or portions thereof so tendered and (3) deliver or cause to be delivered to the
Trustee the Notes so accepted together with an Officers' Certificate stating the
aggregate principal amount of Notes or portions thereof being purchased by the
Company.  The Paying Agent will promptly mail to each Holder of Notes so
tendered the Change of Control Payment for such Notes, and the Trustee will
promptly authenticate and mail (or cause to be transferred by book entry) to
each Holder a new Note equal in principal amount to any unpurchased portion of
the Notes surrendered, if any; provided that each such new Note will be in a
principal amount of $1,000 or an integral multiple thereof. The Company shall
publicly announce the results of the Change of Control Offer on or as soon as
practicable after the Change of Control Payment Date.

                                       54
<PAGE>
 
      (c) Notwithstanding anything to the contrary in this Section 4.15, the
Company shall not be required to make a Change of Control Offer upon a Change of
Control if a third party makes the Change of Control Offer in the manner, at the
times and otherwise in compliance with the requirements set forth in this
Section 4.15 and Section 3.09 hereof made by the Company and purchases all Notes
validly tendered and not withdrawn under such Change of Control Offer.

      (d) Prior to complying with the provisions of this Section 4.15, but in
any event within 90 days following a Change of Control, the Company shall either
repay all outstanding Senior Debt or obtain the requisite consents, if any,
under the agreements governing outstanding Senior Debt to permit the repurchase
of Notes required by this Section 4.15.

Section 4.16.  No Senior Subordinated Debt.

      The Company shall not incur, create, issue, assume, guarantee or otherwise
become liable for any Indebtedness that is subordinate or junior in right of
payment to any Indebtedness and senior in any respect in right of payment to the
Notes, and no Subsidiary Guarantor shall incur, create, issue, assume, guarantee
or otherwise become liable for any Indebtedness that is subordinate or junior in
right of payment to any Indebtedness of such Subsidiary Guarantor and senior in
any respect in right of payment to the Subsidiary Guarantee of such Subsidiary
Guarantor; provided that no Indebtedness shall be deemed subordinate or junior
in right of payment to any other Indebtedness solely by reason of the fact that
such Indebtedness is unsecured.

Section 4.17.  Limitation on Sale and Leaseback Transactions.

      The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, enter into any sale and leaseback transaction; provided that
the Company or any of its Restricted Subsidiaries may enter into a sale and
leaseback transaction if (i) the Company or such Restricted Subsidiary could
have (a) incurred Indebtedness in an amount equal to the Attributable Debt
relating to such sale and leaseback transaction pursuant to Section 4.09 hereof
and (b) incurred a Lien to secure such Indebtedness pursuant to Section 4.12
hereof, (ii) the gross cash proceeds of such sale and leaseback transaction are
at least equal to the fair market value (as determined in good faith by the
Board of Directors of the Company and set forth in an Officers' Certificate
delivered to the Trustee) of the property that is the subject of such sale and
leaseback transaction and (iii) the transfer of assets in such sale and
leaseback transaction is permitted by, and if applicable, the Company applies
the proceeds of such transaction in compliance with Section 4.10 hereof.
Notwithstanding the foregoing, this covenant shall not apply to the sale and
leaseback of (i) the backhoe dredge "New York" under construction on the date of
the Indenture or (ii) the dredging assets acquired from T.L. James & Company,
Inc. pursuant to the acquisition agreement in effect on the date of the
Indenture, as such agreement is in effect on such date, in the case of clauses
(i) and (ii), within 120 days of the date of completion of such construction or
acquisition of such assets, as applicable.

Section 4.18.  Limitation on Issuances of Guarantees of Indebtedness.

      The Company shall not permit any Restricted Subsidiary, directly or
indirectly, to Guarantee any other Indebtedness of the Company or a Subsidiary
Guarantor unless, if such Restricted Subsidiary is 

                                       55
<PAGE>
 
not a Guarantor, such Restricted Subsidiary simultaneously executes and delivers
a supplemental indenture to this Indenture providing for the Guarantee of the
payment of the Notes by such Restricted Subsidiary, which Guarantee shall be
senior to or pari passu with such Subsidiary's Guarantee of such other
Indebtedness unless such other Indebtedness is Senior Debt, in which case the
Guarantee of the Notes may be subordinated to the Guarantee of such Senior Debt
to the same extent as the Notes are subordinated to such Senior Debt.
Notwithstanding the foregoing, any such Subsidiary Guarantee shall provide by
its terms that it shall be automatically and unconditionally released and
discharged upon any sale, exchange or transfer, to any Person not an Affiliate
of the Company, of all of the Company's stock in, or all or substantially all
the assets of, such Restricted Subsidiary, which sale, exchange or transfer is
made in compliance with the applicable provisions hereof. The form of such
Subsidiary Guarantee is attached as Exhibit E hereto.

Section 4.19.  Payments for Consent.

      Neither the Company nor any of its Restricted Subsidiaries shall, directly
or indirectly, pay or cause to be paid any consideration, whether by way of
interest, fee or otherwise, to any Holder of any Notes for or as an inducement
to any consent, waiver or amendment of any of the terms or provisions of this
Indenture or the Notes unless such consideration is offered to be paid or is
paid to all Holders of the Notes that consent, waive or agree to amend in the
time frame set forth in the solicitation documents relating to such consent,
waiver or agreement.

Section 4.20.  Additional Subsidiary Guarantees.

      If the Company or any of its Restricted Subsidiaries shall acquire or
create another domestic Subsidiary after the date of this Indenture, then,
unless such Subsidiary is properly designated as an Unrestricted Subsidiary,
such newly acquired or created Subsidiary shall become a Subsidiary Guarantor
and execute a supplemental indenture and deliver an Opinion of Counsel, in
accordance with the terms of this Indenture.  The form of such Subsidiary
Guarantee is attached as Exhibit E hereto.

                                   ARTICLE 5
                                   SUCCESSORS

Section 5.01.  Merger, Consolidation, or Sale of Assets.

      The Company shall not consolidate or merge with or into (whether or not
the Company is the surviving corporation), or sell, assign, transfer, convey or
otherwise dispose of all or substantially all of its properties or assets in one
or more related transactions, to another Person unless (i) the Company is the
surviving corporation or the entity or the Person formed by or surviving any
such consolidation or merger (if other than the Company) or to which such sale,
assignment, transfer, lease, conveyance or other disposition shall have been
made is a corporation or other entity organized or existing under the laws of
the United States, any state thereof or the District of Columbia; (ii) the
entity or Person formed by or surviving any such consolidation or merger (if
other than the Company) or the entity or Person to which such sale, assignment,
transfer, lease, conveyance or other disposition shall have been made assumes
all the then existing obligations of the Company under the Registration Rights
Agreement, the 

                                       56
<PAGE>
 
Notes and this Indenture pursuant to a supplemental indenture in a form
reasonably satisfactory to the Trustee; (iii) immediately after such transaction
no Default or Event of Default exists; and (iv) except in the case of a merger
of the Company with or into a Wholly Owned Subsidiary of the Company, the
Company or the Person formed by or surviving any such consolidation or merger
(if other than the Company), or to which such sale, assignment, transfer, lease,
conveyance or other disposition shall have been made will, at the time of such
transaction and after giving pro forma effect thereto as if such transaction had
occurred at the beginning of the applicable four-quarter period, be permitted to
incur at least $1.00 of additional Indebtedness pursuant to the Fixed Charge
Coverage Ratio test set forth in the first paragraph of Section 4.09 hereof. The
Company shall not, directly or indirectly, lease all or substantially all of its
properties or assets to any Person.

Section 5.02.  Successor Corporation Substituted.

      Upon any consolidation or merger, or any sale, assignment, transfer,
lease, conveyance or other disposition of all or substantially all of the assets
of the Company in accordance with Section 5.01 hereof, the successor corporation
formed by such consolidation or into or with which the Company is merged or to
which such sale, assignment, transfer, lease, conveyance or other disposition is
made shall succeed to, and be substituted for (so that from and after the date
of such consolidation, merger, sale, lease, conveyance or other disposition, the
provisions of this Indenture referring to the "Company" shall refer instead to
the successor corporation and not to the Company), and may exercise every right
and power of the Company under this Indenture with the same effect as if such
successor Person had been named as the Company herein; provided, however, that
the predecessor Company shall not be relieved from the obligation to pay the
principal of and interest on the Notes except in the case of a sale of all of
the Company's assets that meets the requirements of Section 5.01 hereof.

                                   ARTICLE 6
                             DEFAULTS AND REMEDIES

Section 6.01.  Events of Default.

      An "Event of Default" occurs if:

      (a) the Company defaults in the payment when due of interest on, or
Liquidated Damages with respect to, the Notes (whether or not permitted by
Article 10 hereof) and such default continues for a period of 30 days;

      (b) the Company defaults in the payment when due of principal of or
premium, if any, on the Notes (whether or not permitted by the provisions of
Article 10 hereof) when the same becomes due and payable at maturity, upon
redemption (including in connection with an offer to purchase) or otherwise;

      (c) the Company or any of its Restricted Subsidiaries fails to comply with
any of the provisions of 4.15 hereof;

      (d) the Company or any of its Restricted Subsidiaries fails to observe or
perform any other covenant, representation, warranty or other agreement in this
Indenture or the Notes for 60 days after 

                                       57
<PAGE>
 
notice to the Company by the Trustee or the Holders of at least 25% in aggregate
principal amount of the Notes (including Additional Notes, if any) then
outstanding voting as a single class;

      (e) a default occurs under any mortgage, indenture or instrument under
which there may be issued or by which there may be secured or evidenced any
Indebtedness for money borrowed by the Company or any of its Restricted
Subsidiaries (or the payment of which is guaranteed by the Company or any of its
Restricted Subsidiaries) whether such Indebtedness or guarantee now exists, or
is created after the date hereof, which default (i) is caused by a failure to
pay principal of or premium, if any, or interest on such Indebtedness prior to
the expiration of the grace period provided in such Indebtedness on the date of
such default (a "Payment Default") or (ii) results in the acceleration of such
Indebtedness prior to its stated maturity and, in each case, the principal
amount of any such Indebtedness, together with the principal amount of any other
such Indebtedness under which there has been a Payment Default or the maturity
of which has been so accelerated (after giving effect to any applicable grace
period), aggregates $10.0 million or more;

      (f) the Company or any of its Restricted Subsidiaries fails to pay final
judgments aggregating in excess  of $10.0 million (net of any amount with
respect to which a reputable insurance company with assets over $100.0 million
has acknowledged liability in writing), which judgments are not paid, discharged
or stayed for a period of 60 days after their entry;

      (g) the Company or any of its Subsidiaries or any group of Subsidiaries
that, taken as a whole, would constitute a Significant Subsidiary pursuant to or
within the meaning of Bankruptcy Law:

          (i)   commences a voluntary case,

          (ii)  consents to the entry of an order for relief against it in an
   involuntary case,

          (iii) consents to the appointment of a custodian of it or for all or
   substantially all of its property,

          (iv)  makes a general assignment for the benefit of its creditors, or

          (v)   generally is not paying its debts as they become due; or

      (h) a court of competent jurisdiction enters an order or decree under any
Bankruptcy Law that:

          (i)   is for relief against the Company or any of its Significant
   Subsidiaries or any group of Subsidiaries that, taken as a whole, would
   constitute a Significant Subsidiary in an involuntary case;

          (ii)  appoints a custodian of the Company or any of its Significant
   Subsidiaries or any group of Subsidiaries that, taken as a whole, would
   constitute a Significant Subsidiary or for all or substantially all of the
   property of the Company or any of its Significant Subsidiaries or any group
   of Subsidiaries that, taken as a whole, would constitute a Significant
   Subsidiary; or

                                       58
<PAGE>
 
          (iii)  orders the liquidation of the Company or any of its Significant
   Subsidiaries or any group of Subsidiaries that, taken as a whole, would
   constitute a Significant Subsidiary;

and the order or decree remains unstayed and in effect for 60 consecutive days;
or

      (i) except as permitted by this Indenture, any Subsidiary Guarantee is
held in any judicial proceeding to be unenforceable or invalid or shall cease
for any reason to be in full force and effect or any Subsidiary Guarantor, or
any Person acting on behalf of any Subsidiary Guarantor, shall deny or disaffirm
its obligations under such Subsidiary Guarantor's Subsidiary Guarantee.

Section 6.02.  Acceleration.

      If any Event of Default (other than an Event of Default specified in
clause (g) or (h) of Section 6.01 hereof with respect to the Company, any
Significant Subsidiary or any group of Significant Subsidiaries that, taken as a
whole, would constitute a Significant Subsidiary) occurs and is continuing, the
Trustee or the Holders of at least 25% in principal amount of the then
outstanding Notes may declare all the Notes to be due and payable immediately.
Notwithstanding the foregoing, if an Event of Default specified in clause (g) or
(h) of Section 6.01 hereof occurs with respect to the Company, any of its
Significant Subsidiaries or any group of Subsidiaries that, taken as a whole,
would constitute a Significant Subsidiary, all outstanding Notes shall be due
and payable immediately without further action or notice.  The Holders of a
majority in aggregate principal amount of the then outstanding Notes by written
notice to the Trustee may on behalf of all of the Holders rescind an
acceleration and its consequences if the rescission would not conflict with any
judgment or decree and if all existing Events of Default (except nonpayment of
principal, interest or premium that has become due solely because of the
acceleration) have been cured or waived.

Section 6.03.  Other Remedies.

      If an Event of Default occurs and is continuing, the Trustee may pursue
any available remedy to collect the payment of principal, premium, if any, and
interest on the Notes or to enforce the performance of any provision of the
Notes or this Indenture.

      The Trustee may maintain a proceeding even if it does not possess any of
the Notes or does not produce any of them in the proceeding.  A delay or
omission by the Trustee or any Holder of a Note in exercising any right or
remedy accruing upon an Event of Default shall not impair the right or remedy or
constitute a waiver of or acquiescence in the Event of Default.  All remedies
are cumulative to the extent permitted by law.

Section 6.04.  Waiver of Past Defaults.

      Holders of not less than a majority in aggregate principal amount of the
then outstanding Notes by notice to the Trustee may on behalf of the Holders of
all of the Notes waive an existing Default or Event of Default and its
consequences hereunder, except a continuing Default or Event of Default in the
payment of the principal of, premium and Liquidated Damages, if any, or interest
on, the Notes (including in connection with an offer to purchase) (provided,
however, that the Holders of a majority in 

                                       59
<PAGE>
 
aggregate principal amount of the then outstanding Notes may rescind an
acceleration and its consequences, including any related payment default that
resulted from such acceleration). Upon any such waiver, such Default shall cease
to exist, and any Event of Default arising therefrom shall be deemed to have
been cured for every purpose of this Indenture; but no such waiver shall extend
to any subsequent or other Default or impair any right consequent thereon.

Section 6.05.  Control by Majority.

      Holders of a majority in principal amount of the then outstanding Notes
may direct the time, method and place of conducting any proceeding for
exercising any remedy available to the Trustee or exercising any trust or power
conferred on it.  However, the Trustee may refuse to follow any direction that
conflicts with law or this Indenture that the Trustee determines may be unduly
prejudicial to the rights of other Holders of Notes or that may involve the
Trustee in personal liability.

Section 6.06.  Limitation on Suits.

      A Holder of a Note may pursue a remedy with respect to this Indenture or
the Notes only if:

      (a) the Holder of a Note gives to the Trustee written notice of a
continuing Event of Default;

      (b) the Holders of at least 25% in principal amount of the then
outstanding Notes make a written request to the Trustee to pursue the remedy;

      (c) such Holder of a Note or Holders of Notes offer and, if requested,
provide to the Trustee indemnity satisfactory to the Trustee against any loss,
liability or expense;

      (d) the Trustee does not comply with the request within 60 days after
receipt of the request and the offer and, if requested, the provision of
indemnity; and

      (e) during such 60-day period the Holders of a majority in principal
amount of the then outstanding Notes do not give the Trustee a direction
inconsistent with the request.

      A Holder of a Note may not use this Indenture to prejudice the rights of
another Holder of a Note or to obtain a preference or priority over another
Holder of a Note.

Section 6.07.  Rights of Holders of Notes to Receive Payment.

      Notwithstanding any other provision of this Indenture, the right of any
Holder of a Note to receive payment of principal, premium and Liquidated
Damages, if any, and interest on the Note, on or after the respective due dates
expressed in the Note (including in connection with an offer to purchase), or to
bring suit for the enforcement of any such payment on or after such respective
dates, shall not be impaired or affected without the consent of such Holder.

                                       60
<PAGE>
 
Section 6.08.  Collection Suit by Trustee.

      If an Event of Default specified in Section 6.01(a) or (b) occurs and is
continuing, the Trustee is authorized to recover judgment in its own name and as
trustee of an express trust against the Company for the whole amount of
principal of, premium and Liquidated Damages, if any, and interest remaining
unpaid on the Notes and interest on overdue principal and, to the extent lawful,
interest and such further amount as shall be sufficient to cover the costs and
expenses of collection, including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel.

Section 6.09.  Trustee May File Proofs of Claim.

      The Trustee is authorized to file such proofs of claim and other papers or
documents as may be necessary or advisable in order to have the claims of the
Trustee (including any claim for the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel) and the
Holders of the Notes allowed in any judicial proceedings relative to the Company
(or any other obligor upon the Notes), its creditors or its property and shall
be entitled and empowered to collect, receive and distribute any money or other
property payable or deliverable on any such claims and any custodian in any such
judicial proceeding is hereby authorized by each Holder to make such payments to
the Trustee, and in the event that the Trustee shall consent to the making of
such payments directly to the Holders, to pay to the Trustee any amount due to
it for the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 7.07 hereof.  To the extent that the payment of any such compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel, and
any other amounts due the Trustee under Section 7.07 hereof out of the estate in
any such proceeding, shall be denied for any reason, payment of the same shall
be secured by a Lien on, and shall be paid out of, any and all distributions,
dividends, money, securities and other properties that the Holders may be
entitled to receive in such proceeding whether in liquidation or under any plan
of reorganization or arrangement or otherwise.  Nothing herein contained shall
be deemed to authorize the Trustee to authorize or consent to or accept or adopt
on behalf of any Holder any plan of reorganization, arrangement, adjustment or
composition affecting the Notes or the rights of any Holder, or to authorize the
Trustee to vote in respect of the claim of any Holder in any such proceeding.

Section 6.10.  Priorities.

      If the Trustee collects any money pursuant to this Article, it shall pay
out the money in the following order:

         First:  to the Trustee, its agents and attorneys for amounts due under
   Section 7.07 hereof, including payment of all compensation, expense and
   liabilities incurred, and all advances made, by the Trustee and the costs and
   expenses of collection;

         Second:  to Holders of Notes for amounts due and unpaid on the Notes
   for principal, premium and Liquidated Damages, if any, and interest, ratably,
   without preference or priority of any kind, according to the amounts due and
   payable on the Notes for principal, premium and Liquidated Damages, if any
   and interest, respectively; and

                                       61
<PAGE>
 
         Third:  to the Company or to such party as a court of competent
   jurisdiction shall direct.

      The Trustee may fix a record date and payment date for any payment to
Holders of Notes pursuant to this Section 6.10.

Section 6.11.  Undertaking for Costs.

      In any suit for the enforcement of any right or remedy under this
Indenture or in any suit against the Trustee for any action taken or omitted by
it as a Trustee, a court in its discretion may require the filing by any party
litigant in the suit of an undertaking to pay the costs of the suit, and the
court in its discretion may assess reasonable costs, including reasonable
attorneys' fees, against any party litigant in the suit, having due regard to
the merits and good faith of the claims or defenses made by the party litigant.
This Section does not apply to a suit by the Trustee, a suit by a Holder of a
Note pursuant to Section 6.07 hereof, or a suit by Holders of more than 10% in
principal amount of the then outstanding Notes.

                                   ARTICLE 7
                                    TRUSTEE

Section 7.01.  Duties of Trustee.

      (a)    If an Event of Default has occurred and is continuing, the Trustee
shall exercise such of the rights and powers vested in it by this Indenture, and
use the same degree of care and skill in its exercise, as a prudent person would
exercise or use under the circumstances in the conduct of such person's own
affairs.

      (b)    Except during the continuance of an Event of Default:

      (i)    the duties of the Trustee shall be determined solely by the express
provisions of this Indenture and the Trustee need perform only those duties that
are specifically set forth in this Indenture and no others, and no implied
covenants or obligations shall be read into this Indenture against the Trustee;
and

      (ii)   in the absence of bad faith on its part, the Trustee may
conclusively rely, as to the truth of the statements and the correctness of the
opinions expressed therein, upon certificates or opinions furnished to the
Trustee and conforming to the requirements of this Indenture. However, the
Trustee shall examine the certificates and opinions to determine whether or not
they conform to the requirements of this Indenture.

      (c)    The Trustee may not be relieved from liabilities for its own
negligent action, its own negligent failure to act, or its own willful
misconduct, except that:

      (i)    this paragraph does not limit the effect of paragraph (b) of this
Section 7.01;

                                       62
<PAGE>
 
      (ii)   the Trustee shall not be liable for any error of judgment made in
good faith by a Responsible Officer, unless it is proved that the Trustee was
negligent in ascertaining the pertinent facts; and

      (iii)  the Trustee shall not be liable with respect to any action it takes
or omits to take in good faith in accordance with a direction received by it
pursuant to Section 6.05 hereof.

      (d)    Whether or not therein expressly so provided, every provision of
this Indenture that in any way relates to the Trustee is subject to paragraphs
(a), (b), and (c) of this Section 7.01.

      (e)    No provision of this Indenture shall require the Trustee to expend
or risk its own funds or incur any liability. The Trustee shall be under no
obligation to exercise any of its rights and powers under this Indenture at the
request of any Holders, unless such Holder shall have offered to the Trustee
security and indemnity satisfactory to it against any loss, liability or
expense.

      (f)    The Trustee shall not be liable for interest on any money received
by it except as the Trustee may agree in writing with the Company. Money held in
trust by the Trustee need not be segregated from other funds except to the
extent required by law.

Section 7.02.  Rights of Trustee.

      (a) The Trustee may conclusively rely upon any document believed by it to
be genuine and to have been signed or presented by the proper Person.  The
Trustee need not investigate any fact or matter stated in the document.

      (b) Before the Trustee acts or refrains from acting, it may require an
Officers' Certificate or an Opinion of Counsel or both.  The Trustee shall not
be liable for any action it takes or omits to take in good faith in reliance on
such Officers' Certificate or Opinion of Counsel.  The Trustee may consult with
counsel and the advice of such counsel or any Opinion of Counsel shall be full
and complete authorization and protection from liability in respect of any
action taken, suffered or omitted by it hereunder in good faith and in reliance
thereon.

      (c) The Trustee may act through its attorneys and agents and shall not be
responsible for the misconduct or negligence of any agent appointed with due
care.

      (d) The Trustee shall not be liable for any action it takes or omits to
take in good faith that it believes to be authorized or within the rights or
powers conferred upon it by this Indenture; provided, that the Trustee's conduct
does not constitute willful misconduct or negligence.

      (e) Unless otherwise specifically provided in this Indenture, any demand,
request, direction or notice from the Company shall be sufficient if signed by
an Officer of the Company.

      (f) The Trustee shall be under no obligation to exercise any of the rights
or powers vested in it by this Indenture at the request or direction of any of
the Holders unless such Holders shall have offered to the Trustee reasonable
security or indemnity against the costs, expenses and liabilities that might be
incurred by it in compliance with such request or direction.

                                       63
<PAGE>
 
      (g) The Trustee shall not be bound to make any investigation into the
facts or matters stated in any resolution, certificate, statement, instrument,
opinion, report, notice, request, direction, consent, order, bond, debenture,
note, other evidence of indebtedness or other paper or document, but the
Trustee, in its reasonable discretion, may make such further inquiry or
investigation into such facts or matters as it may see fit, and, if the Trustee
shall reasonably determine to make such further inquiry or investigation, it
shall be entitled to examine the books, records and premises of the Company
during normal business hours and upon reasonable notice, personally or by agent
or attorney at the sole cost of the Company and shall incur no liability or
additional liability of any kind by reason of such inquiry or investigation;

      (h) The Trustee may execute any of the trusts or powers hereunder or
perform any duties hereunder either directly or by or through agents or
attorneys and the Trustee shall not be responsible for any willful misconduct or
gross negligence on the part of any agent or attorney appointed with due care by
it hereunder;

      (i) The Trustee shall not be deemed to have notice of any Default or Event
of Default unless  a Responsible Officer of the Trustee has actual knowledge
thereof or unless written notice of any event which is in fact such a default is
received by the Trustee at the Corporate Trust Office of the Trustee, and such
notice references the Notes and this Indenture; and

      (j) The rights, privileges, protections, immunities and benefits given to
the Trustee, including, without limitation, its right to be indemnified, are
extended to, and shall be enforceable by, the Trustee in each of its capacities
hereunder, and to each agent, custodian and other Person employed to act
hereunder.

Section 7.03.  Individual Rights of Trustee.

      The Trustee in its individual or any other capacity may become the owner
or pledgee of Notes and may otherwise deal with the Company or any Affiliate of
the Company with the same rights it would have if it were not Trustee.  However,
in the event that the Trustee acquires any conflicting interest it must
eliminate such conflict within 90 days, apply to the SEC for permission to
continue as trustee or resign.  Any Agent may do the same with like rights and
duties.  The Trustee is also subject to Sections 7.10 and 7.11 hereof.

Section 7.04.  Trustee's Disclaimer.

      The Trustee shall not be responsible for and makes no representation as to
the validity or adequacy of this Indenture or the Notes, it shall not be
accountable for the Company's use of the proceeds from the Notes or any money
paid to the Company or upon the Company's direction under any provision of this
Indenture, it shall not be responsible for the use or application of any money
received by any Paying Agent other than the Trustee, and it shall not be
responsible for any statement or recital herein or any statement in the Notes or
any other document in connection with the sale of the Notes or pursuant to this
Indenture other than its certificate of authentication.

                                       64
<PAGE>
 
Section 7.05.  Notice of Defaults.

      If a Default or Event of Default occurs and is continuing and if it is
actually known to the Trustee, the Trustee shall mail to Holders of Notes a
notice of the Default or Event of Default within 90 days after it occurs. Except
in the case of a Default or Event of Default in payment of principal of,
premium, if any, or interest on any Note, the Trustee may withhold the notice if
and so long as a committee of its Responsible Officers in good faith determines
that withholding the notice is in the interests of the Holders of the Notes.

Section 7.06.  Reports by Trustee to Holders of the Notes.

      Within 60 days after each May 15 beginning with the May 15 following the
date of this Indenture, and for so long as Notes remain outstanding, the Trustee
shall mail to the Holders of the Notes a brief report dated as of such reporting
date that complies with TIA (S) 313(a) (but if no event described in TIA (S)
313(a) has occurred within the twelve months preceding the reporting date, no
report need be transmitted).  The Trustee also shall comply with TIA (S)
313(b)(2).  The Trustee shall also transmit by mail all reports as required by
TIA (S) 313(c).

      A copy of each report at the time of its mailing to the Holders of Notes
shall be mailed to the Company and filed with the SEC and each stock exchange on
which the Notes are listed in accordance with TIA (S) 313(d).  The Company shall
promptly notify the Trustee when the Notes are listed on any stock exchange and
any delisting thereof.

Section 7.07.  Compensation and Indemnity.

      The Company shall pay to the Trustee from time to time reasonable
compensation for its acceptance of this Indenture and services hereunder as the
Company and the Trustee shall from time to time agree in writing.  The Trustee's
compensation shall not be limited by any law on compensation of a trustee of an
express trust.  The Company shall reimburse the Trustee promptly upon request
for all reasonable disbursements, advances and expenses incurred or made by it
in addition to the compensation for its services.  Such expenses shall include
the reasonable compensation, disbursements and expenses of the Trustee's agents
and counsel.

      The Company shall indemnify the Trustee against any and all losses,
liabilities or expenses incurred by it arising out of or in connection with the
acceptance or administration of its duties under this Indenture, including the
costs and expenses of enforcing this Indenture against the Company (including
this Section 7.07) and defending itself against any claim (whether asserted by
the Company or any Holder or any other person) or liability in connection with
the exercise or performance of any of its powers or duties hereunder, except to
the extent any such loss, liability or expense may be attributable to its
negligence or bad faith.  The Trustee shall notify the Company promptly of any
claim for which it may seek indemnity.  Failure by the Trustee to so notify the
Company shall not relieve the Company of its obligations hereunder.  The Company
shall defend the claim and the Trustee shall cooperate in the defense.  The
Trustee may have separate counsel and the Company shall pay the reasonable fees
and expenses of such counsel.  The Company need not pay for any settlement made
without its consent, which consent shall not be unreasonably withheld.

                                       65
<PAGE>
 
      The obligations of the Company under this Section 7.07 shall survive the
satisfaction and discharge of this Indenture.

      To secure the Company's payment obligations in this Section, the Trustee
shall have a Lien prior to the Notes on all money or property held or collected
by the Trustee, except that held in trust to pay principal and interest on
particular Notes. Such Lien shall survive the satisfaction and discharge of this
Indenture.

      When the Trustee incurs expenses or renders services after an Event of
Default specified in Section 6.01(g) or (h) hereof occurs, the expenses and the
compensation for the services (including the fees and expenses of its agents and
counsel) are intended to constitute expenses of administration under any
Bankruptcy Law.

      The Trustee shall comply with the provisions of TIA (S) 313(b)(2) to the
extent applicable.

Section 7.08.  Replacement of Trustee.

      A resignation or removal of the Trustee and appointment of a successor
Trustee shall become effective only upon the successor Trustee's acceptance of
appointment as provided in this Section 7.08.

      The Trustee may resign in writing at any time and be discharged from the
trust hereby created by so notifying the Company.  The Holders of a majority in
principal amount of the then outstanding Notes may remove the Trustee by so
notifying the Trustee and the Company in writing.  The Company may remove the
Trustee if:

      (a) the Trustee fails to comply with Section 7.10 hereof;

      (b) the Trustee is adjudged a bankrupt or an insolvent or an order for
relief is entered with respect to the Trustee under any Bankruptcy Law;

      (c) a custodian or public officer takes charge of the Trustee or its
property; or

      (d) the Trustee becomes incapable of acting.

      If the Trustee resigns or is removed or if a vacancy exists in the office
of Trustee for any reason, the Company shall promptly appoint a successor
Trustee.  Within one year after the successor Trustee takes office, the Holders
of a majority in principal amount of the then outstanding Notes may appoint a
successor Trustee to replace the successor Trustee appointed by the Company.

      If a successor Trustee does not take office within 30 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company, or
the Holders of at least 10% in principal amount of the then outstanding Notes
may petition any court of competent jurisdiction for the appointment of a
successor Trustee.

                                       66
<PAGE>
 
      If the Trustee, after written request by any Holder who has been a Holder
for at least six months, fails to comply with Section 7.10, such Holder may
petition any court of competent jurisdiction for the removal of the Trustee and
the appointment of a successor Trustee.

      A successor Trustee shall deliver a written acceptance of its appointment
to the retiring Trustee and to the Company. Thereupon, the resignation or
removal of the retiring Trustee shall become effective, and the successor
Trustee shall have all the rights, powers and duties of the Trustee under this
Indenture. The successor Trustee shall mail a notice of its succession to
Holders. The retiring Trustee shall promptly transfer all property held by it as
Trustee to the successor Trustee, provided all sums owing to the Trustee
hereunder have been paid and subject to the Lien provided for in Section 7.07
hereof. Notwithstanding replacement of the Trustee pursuant to this Section
7.08, the Company's obligations under Section 7.07 hereof shall continue for the
benefit of the retiring Trustee.

Section 7.09.  Successor Trustee by Merger, etc.

      If the Trustee consolidates, merges or converts into, or transfers all or
substantially all of its corporate trust business to, another corporation, the
successor corporation without any further act shall be the successor Trustee.

Section 7.10.  Eligibility; Disqualification.

      There shall at all times be a Trustee hereunder that is a corporation
organized and doing business under the laws of the United States of America or
of any state thereof that is authorized under such laws to exercise corporate
trustee power, that is subject to supervision or examination by federal or state
authorities and that has a combined capital and surplus of at least $100 million
as set forth in its most recent published annual report of condition.

      This Indenture shall always have a Trustee who satisfies the requirements
of TIA (S) 310(a)(1), (2) and (5).  The Trustee is subject to TIA (S) 310(b).

Section 7.11.  Preferential Collection of Claims Against Company.

      The Trustee is subject to TIA (S) 311(a), excluding any creditor
relationship listed in TIA (S) 311(b).  A Trustee who has resigned or been
removed shall be subject to TIA (S) 311(a) to the extent indicated therein.

                                   ARTICLE 8
                   LEGAL DEFEASANCE AND COVENANT DEFEASANCE

Section 8.01.  Option to Effect Legal Defeasance or Covenant Defeasance.

      The Company may, at the option of its Board of Directors evidenced by a
resolution set forth in an Officers' Certificate, at any time, elect to have
either Section 8.02 or 8.03 hereof be applied to all outstanding Notes upon
compliance with the conditions set forth below in this Article Eight.

                                       67
<PAGE>
 
Section 8.02.  Legal Defeasance and Discharge.

      Upon the Company's exercise under Section 8.01 hereof of the option
applicable to this Section 8.02, the Company shall, subject to the satisfaction
of the conditions set forth in Section 8.04 hereof, be deemed to have been
discharged from its obligations with respect to all outstanding Notes on the
date the conditions set forth below are satisfied (hereinafter, "Legal
Defeasance"). For this purpose, Legal Defeasance means that the Company shall be
deemed to have paid and discharged the entire Indebtedness represented by the
outstanding Notes, which shall thereafter be deemed to be "outstanding" only for
the purposes of Section 8.05 hereof and the other Sections of this Indenture
referred to in (a) and (b) below, and to have satisfied all its other
obligations under such Notes and this Indenture (and the Trustee, on demand of
and at the expense of the Company, shall execute proper instruments
acknowledging the same), except for the following provisions which shall survive
until otherwise terminated or discharged hereunder: (a) the rights of Holders of
outstanding Notes to receive solely from the trust fund described in Section
8.04 hereof, and as more fully set forth in such Section, payments in respect of
the principal of, premium and Liquidated Damages, if any, and interest on such
Notes when such payments are due, (b) the Company's obligations with respect to
such Notes under Article 2 and Section 4.02 hereof, (c) the rights, powers,
trusts, duties and immunities of the Trustee hereunder and the Company's
obligations in connection therewith and (d) the Legal Defeasance provisions of
this Article Eight. Subject to compliance with this Article Eight, the Company
may exercise its option under this Section 8.02 notwithstanding the prior
exercise of its option under Section 8.03 hereof.

Section 8.03.  Covenant Defeasance.

      Upon the Company's exercise under Section 8.01 hereof of the option
applicable to this Section 8.03, the Company shall, subject to the satisfaction
of the conditions set forth in Section 8.04 hereof, be released from its
obligations under the covenants contained in Sections 4.07, 4.08, 4.09, 4.10,
4.11, 4.12, 4.13, 4.15, 4.16, 4.17, 4.18, 4.19 and 4.20 hereof and clause (iv)
of Section 5.01 hereof with respect to the outstanding Notes on and after the
date the conditions set forth in Section 8.04 are satisfied (hereinafter,
"Covenant Defeasance"), and the Notes shall thereafter be deemed not
"outstanding" for the purposes of any direction, waiver, consent or declaration
or act of Holders (and the consequences of any thereof) in connection with such
covenants, but shall continue to be deemed "outstanding" for all other purposes
hereunder (it being understood that such Notes shall not be deemed outstanding
for accounting purposes).  For this purpose, Covenant Defeasance means that,
with respect to the outstanding Notes, the Company may omit to comply with and
shall have no liability in respect of any term, condition or limitation set
forth in any such covenant, whether directly or indirectly, by reason of any
reference elsewhere herein to any such covenant or by reason of any reference in
any such covenant to any other provision herein or in any other document and
such omission to comply shall not constitute a Default or an Event of Default
under Section 6.01 hereof, but, except as specified above, the remainder of this
Indenture and such Notes shall be unaffected thereby.  In addition, upon the
Company's exercise under Section 8.01 hereof of the option applicable to this
Section 8.03 hereof, subject to the satisfaction of the conditions set forth in
Section 8.04 hereof, Sections 6.01(c) through 6.01(f) hereof shall not
constitute Events of Default.

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<PAGE>
 
Section 8.04.  Conditions to Legal or Covenant Defeasance.

      The following shall be the conditions to the application of either Section
8.02 or 8.03 hereof to the outstanding Notes:

      In order to exercise either Legal Defeasance or Covenant Defeasance:

      (a) the Company must irrevocably deposit with the Trustee, in trust, for
the benefit of the Holders, cash in United States dollars, non-callable
Government Securities, or a combination thereof, in such amounts as will be
sufficient, in the opinion of a nationally recognized firm of independent public
accountants, to pay the principal of, premium and Liquidated Damages, if any,
and interest on the outstanding Notes on the stated maturity or on the
applicable redemption date, as the case may be, and the Company must specify
whether the Notes are being defeased to maturity or to a particular redemption
date;

      (b) in the case of an election under Section 8.02 hereof, the Company
shall have delivered to the Trustee an Opinion of Counsel in the United States
reasonably acceptable to the Trustee confirming that (A) the Company has
received from, or there has been published by, the Internal Revenue Service a
ruling or (B) since the date of this Indenture, there has been a change in the
applicable federal income tax law, in either case to the effect that, and based
thereon such Opinion of Counsel shall confirm that, subject to customary
assumptions and exceptions, the Holders of the outstanding Notes will not
recognize income, gain or loss for federal income tax purposes as a result of
such Legal Defeasance and will be subject to federal income tax on the same
amounts, in the same manner and at the same times as would have been the case if
such Legal Defeasance had not occurred;

      (c) in the case of an election under Section 8.03 hereof, the Company
shall have delivered to the Trustee an Opinion of Counsel in the United States
reasonably acceptable to the Trustee confirming that, subject to customary
assumptions and exceptions, the Holders of the outstanding Notes will not
recognize income, gain or loss for federal income tax purposes as a result of
such Covenant Defeasance and will be subject to federal income tax on the same
amounts, in the same manner and at the same times as would have been the case if
such Covenant Defeasance had not occurred;

      (d) no Default or Event of Default shall have occurred and be continuing
on the date of such deposit (other than a Default or Event of Default resulting
from the incurrence of Indebtedness all or a portion of the proceeds of which
will be used to defease the Notes pursuant to this Article Eight concurrently
with such incurrence) or insofar as Sections 6.01(g) or 6.01(h) hereof is
concerned, at any time in the period ending on the 91st day after the date of
deposit;

      (e) such Legal Defeasance or Covenant Defeasance shall not result in a
material breach or violation of, or constitute a default under, any material
agreement or instrument (other than this Indenture) to which the Company or any
of its Subsidiaries is a party or by which the Company or any of its
Subsidiaries is bound;

      (f) the Company shall have delivered to the Trustee an Opinion of Counsel
to the effect that, subject to customary assumptions and exceptions, after the
91st day following the deposit, the trust funds

                                       69
<PAGE>
 
will not be subject to the effect of any applicable bankruptcy, insolvency,
reorganization or similar laws affecting creditors' rights generally;

      (g) the Company shall have delivered to the Trustee an Officers'
Certificate stating that the deposit was not made by the Company with the intent
of preferring the Holders of Notes over any other creditors of the Company or
with the intent of defeating, hindering, delaying or defrauding any other
creditors of the Company; and

      (h) the Company shall have delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each stating that all conditions
precedent provided for or relating to the Legal Defeasance or the Covenant
Defeasance have been complied with.

Section 8.05.  Deposited Money and Government Securities to be Held in Trust;
Other Miscellaneous Provisions.

      Subject to Section 8.06 hereof, all money and non-callable Government
Securities (including the proceeds thereof) deposited with the Trustee (or other
qualifying trustee, collectively for purposes of this Section 8.05, the
"Trustee") pursuant to Section 8.04 hereof in respect of the outstanding Notes
shall be held in trust and applied by the Trustee, in accordance with the
provisions of such Notes and this Indenture, to the payment, either directly or
through any Paying Agent (including the Company acting as Paying Agent) as the
Trustee may determine, to the Holders of such Notes of all sums due and to
become due thereon in respect of principal, premium, if any, and interest, but
such money need not be segregated from other funds except to the extent required
by law.

      The Company shall pay and indemnify the Trustee against any tax, fee or
other charge imposed on or assessed against the cash or non-callable Government
Securities deposited pursuant to Section 8.04 hereof or the principal and
interest received in respect thereof other than any such tax, fee or other
charge which by law is for the account of the Holders of the outstanding Notes.

      Anything in this Article Eight to the contrary notwithstanding, the
Trustee shall deliver or pay to the Company from time to time upon the request
of the Company any money or non-callable Government Securities held by it as
provided in Section 8.04 hereof which, in the opinion of a nationally recognized
firm of independent public accountants expressed in a written certification
thereof delivered to the Trustee (which may be the opinion delivered under
Section 8.04(a) hereof), are in excess of the amount thereof that would then be
required to be deposited to effect an equivalent Legal Defeasance or Covenant
Defeasance.

      The Trustee shall promptly pay to the Company, after written request
therefor, any money held at such time in excess of the amounts required to pay
any of the Company's Obligations then owing with respect to the Notes.

Section 8.06.  Repayment to Company.

      Any money deposited with the Trustee or any Paying Agent, or then held by
the Company, in trust for the payment of the principal of, premium, if any, or
interest on any Note and remaining

                                       70
<PAGE>
 
unclaimed for two years after such principal, and premium, if any, or interest
has become due and payable shall be paid to the Company on its request or (if
then held by the Company) shall be discharged from such trust; and the Holder of
such Note shall thereafter look only to the Company for payment thereof, and all
liability of the Trustee or such Paying Agent with respect to such trust money,
and all liability of the Company as trustee thereof, shall thereupon cease;
provided, however, that the Trustee or such Paying Agent, before being required
to make any such repayment, may at the expense of the Company cause to be
published once, in the New York Times and The Wall Street Journal (national
edition), notice that such money remains unclaimed and that, after a date
specified therein, which shall not be less than 30 days from the date of such
notification or publication, any unclaimed balance of such money then remaining
will be repaid to the Company.

Section 8.07.  Reinstatement.

      If the Trustee or Paying Agent is unable to apply any United States
dollars or non-callable Government Securities in accordance with Section 8.02 or
8.03 hereof, as the case may be, by reason of any order or judgment of any court
or governmental authority enjoining, restraining or otherwise prohibiting such
application, then the Company's obligations under this Indenture and the Notes
shall be revived and reinstated as though no deposit had occurred pursuant to
Section 8.02 or 8.03 hereof until such time as the Trustee or Paying Agent is
permitted to apply all such money in accordance with Section 8.02 or 8.03
hereof, as the case may be; provided, however, that, if the Company makes any
payment of principal of, premium, if any, or interest on any Note following the
reinstatement of its obligations, the Company shall be subrogated to the rights
of the Holders of such Notes to receive such payment from the money held by the
Trustee or Paying Agent.

                                   ARTICLE 9
                       AMENDMENT, SUPPLEMENT AND WAIVER

Section 9.01.  Without Consent of Holders of Notes.

      Notwithstanding Section 9.02 of this Indenture, the Company, the
Subsidiary Guarantors and the Trustee may amend or supplement this Indenture,
the Subsidiary Guarantees or the Notes without the consent of any Holder of a
Note:

      (a) to cure any ambiguity, defect or inconsistency;

      (b) to provide for uncertificated Notes in addition to or in place of
certificated Notes or to alter the provisions of Article 2 hereof (including the
related definitions) in a manner that does not materially adversely affect any
Holder;

      (c) to provide for the assumption of the Company's or a Subsidiary's
Guarantor's obligations to the Holders of the Notes by a successor to the
Company pursuant to Article 5 or Article 10 hereof;

      (d) to make any change that would provide any additional rights or
benefits to the Holders of the Notes or that does not adversely affect the legal
rights hereunder of any Holder of the Note;

                                       71
<PAGE>
 
      (e) to comply with requirements of the SEC in order to effect or maintain
the qualification of this Indenture under the TIA;

      (f) to provide for the issuance of Additional Notes in accordance with the
limitations set forth in this Indenture as of the date hereof; or

      (g) to allow any Subsidiary Guarantor to execute a supplemental indenture
and/or a Subsidiary Guarantee with respect to the Notes.

      Upon the request of the Company accompanied by a resolution of its Board
of Directors authorizing the execution of any such amended or supplemental
Indenture, and upon receipt by the Trustee of the documents described in Section
7.02 hereof, the Trustee shall join with the Company and the Subsidiary
Guarantors in the execution of any amended or supplemental Indenture authorized
or permitted by the terms of this Indenture and to make any further appropriate
agreements and stipulations that may be therein contained, but the Trustee shall
not be obligated to enter into such amended or supplemental indenture that
affects its own rights, duties or immunities under this Indenture or otherwise.

Section 9.02.  With Consent of Holders of Notes.

      Except as provided below in this Section 9.02, the Company and the Trustee
may amend or supplement this Indenture (including Section 3.09, 4.10 and 4.15
hereof), the Subsidiary Guarantees or the Notes with the consent of the Holders
of at least a majority in principal amount of the Notes (including Additional
Notes) then outstanding voting as a single class (including, without limitation,
consents obtained in connection with a purchase of, or tender offer or exchange
offer for, Notes), and, subject to Sections 6.04 and 6.07 hereof, any existing
Default or Event of Default (other than a Default or Event of Default in the
payment of the principal of, premium, Liquidated Damages, if any, or interest on
the Notes, except a payment default resulting from an acceleration that has been
rescinded) or compliance with any provision of this Indenture, the Notes or the
Subsidiary Guarantees may be waived with the consent of the Holders of a
majority in principal amount of the then outstanding Notes (including, without
limitation, consents obtained in connection with a purchase of, or tender offer
or exchange offer for, Notes).

      Upon the request of the Company accompanied by a resolution of its Board
of Directors authorizing the execution of any such amended or supplemental
Indenture, and upon the filing with the Trustee of evidence satisfactory to the
Trustee of the consent of the Holders of Notes as aforesaid, and upon receipt by
the Trustee of the documents described in Section 7.02 hereof, the Trustee shall
join with the Company in the execution of such amended or supplemental Indenture
unless such amended or supplemental Indenture directly affects the Trustee's own
rights, duties or immunities under this Indenture or otherwise, in which case
the Trustee may in its discretion, but shall not be obligated to, enter into
such amended or supplemental Indenture.

      It shall not be necessary for the consent of the Holders of Notes under
this Section 9.02 to approve the particular form of any proposed amendment or
waiver, but it shall be sufficient if such consent approves the substance
thereof.

                                       72
<PAGE>
 
      After an amendment, supplement or waiver under this Section becomes
effective, the Company shall mail to the Holders of Notes affected thereby a
notice briefly describing the amendment, supplement or waiver.  Any failure of
the Company to mail such notice, or any defect therein, shall not, however, in
any way impair or affect the validity of any such amended or supplemental
Indenture or waiver.  Subject to Sections 6.04 and 6.07 hereof, the Holders of a
majority in aggregate principal amount of the Notes (including Additional Notes,
if any) then outstanding voting as a single class may waive compliance in a
particular instance by the Company with any provision of this Indenture or the
Notes.  However, without the consent of each Holder affected, an amendment or
waiver under this Section 9.02 may not (with respect to any Notes held by a non-
consenting Holder):

      (a) reduce the principal amount of Notes whose Holders must consent to an
amendment, supplement or waiver;

      (b) reduce the principal of or change the fixed maturity of any Note or
alter or waive any of the provisions with respect to the redemption of the Notes
(except as provided above with respect to Sections 3.09, 4.10 and 4.15 hereof);

      (c) reduce the rate of or change the time for payment of interest,
including default interest, on any Note;

      (d) waive a Default or Event of Default in the payment of principal of or
premium, if any, or interest on the Notes (except a rescission of acceleration
of the Notes by the Holders of at least a majority in aggregate principal amount
of the then outstanding Notes (including Additional Notes, if any) and a waiver
of the payment default that resulted from such acceleration);

      (e) make any Note payable in money other than that stated in the Notes;

      (f) make any change in the provisions of this Indenture relating to
waivers of past Defaults or the rights of Holders of Notes to receive payments
of principal of or interest on the Notes;

      (g) make any change in Section 6.04 or 6.07 hereof or in the foregoing
amendment and waiver provisions; or

      (h) release any Subsidiary Guarantor from any of its obligations under its
Subsidiary Guarantee or this Indenture, except in accordance with the terms of
this Indenture.

      In addition, any amendment of the provisions of Article 10 herein will
require the consent of the Holders of at least 75% in aggregate principal amount
of the Notes then outstanding if such amendment would adversely affect the
rights of Holders of the Notes.

Section 9.03.  Compliance with Trust Indenture Act.

      Every amendment or supplement to this Indenture or the Notes shall be set
forth in a amended or supplemental Indenture that complies with the TIA as then
in effect.

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<PAGE>
 
Section 9.04.  Revocation and Effect of Consents.

      Until an amendment, supplement or waiver becomes effective, a consent to
it by a Holder of a Note is a continuing consent by the Holder of a Note and
every subsequent Holder of a Note or portion of a Note that evidences the same
debt as the consenting Holder's Note, even if notation of the consent is not
made on any Note.  However, any such Holder of a Note or subsequent Holder of a
Note may revoke the consent as to its Note if the Trustee receives written
notice of revocation before the date the waiver, supplement or amendment becomes
effective.  An amendment, supplement or waiver becomes effective in accordance
with its terms and thereafter binds every Holder.

      The Company may, but shall not be obligated to, fix a record date for the
purpose of determining the Holders entitled to give their consent to any
amendment, supplement or waiver or take any other action described above or
required or permitted to be taken pursuant to this Indenture. If a record date
is fixed, then notwithstanding the immediately preceding paragraph, those
Persons who were Holders at such record date (or their duly designated proxies),
and only those Persons, shall be entitled to give such consent to such
amendment, supplement or waiver or to revoke any consent previously given or to
take any such action, whether or not such Persons continue to be Holders after
such record date. No such consent shall be valid or effective for more than 90
days after such record date.

Section 9.05.  Notation on or Exchange of Notes.

      The Trustee may place an appropriate notation about an amendment,
supplement or waiver on any Note thereafter authenticated.  The Company in
exchange for all Notes may issue and the Trustee shall, upon receipt of an
Authentication Order, authenticate new Notes that reflect the amendment,
supplement or waiver.

      Failure to make the appropriate notation or issue a new Note shall not
affect the validity and effect of such amendment, supplement or waiver.

Section 9.06.  Trustee to Sign Amendments, etc.

      The Trustee shall sign any amended or supplemental Indenture authorized
pursuant to this Article Nine if the amendment or supplement does not adversely
affect the rights, duties, liabilities or immunities of the Trustee.  The
Company may not sign an amendment or supplemental Indenture until the Board of
Directors approves it.  In executing any amended or supplemental indenture, the
Trustee shall be entitled to receive and (subject to Section 7.01 hereof) shall
be fully protected in relying upon, in addition to the documents required by
Section 12.04 hereof, an Officers' Certificate and an Opinion of Counsel stating
that the execution of such amended or supplemental indenture is authorized or
permitted by this Indenture.

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                                  ARTICLE 10
                                 SUBORDINATION

Section 10.01.  Agreement to Subordinate.

      The Company agrees, and each Holder by accepting a Note agrees, that the
Indebtedness evidenced by the Notes is subordinated in right of payment, to the
extent and in the manner provided in this Article 10, to the prior payment in
full of all Senior Debt (whether outstanding on the date hereof or hereafter
created, incurred, assumed or guaranteed), and that the subordination is for the
benefit of the holders of Senior Debt.

Section 10.02.  Liquidation; Dissolution; Bankruptcy.

      Upon any distribution to creditors of the Company in a liquidation or
dissolution of the Company or in a bankruptcy, reorganization, insolvency,
receivership or similar proceeding relating to the Company or its property, an
assignment for the benefit of creditors or any marshaling of the Company's
assets and liabilities:

         (i)    holders of Senior Debt shall be entitled to receive payment in
   full of all Obligations due in respect of such Senior Debt (including
   interest after the commencement of any such proceeding at the rate specified
   in the applicable Senior Debt) before Holders of the Notes shall be entitled
   to receive any payment with respect to the Notes (except that Holders may
   receive (A) Permitted Junior Securities and (B) payments and other
   distributions made from any defeasance trust created pursuant to Section 8.01
   hereof); and

         (ii)   until all Obligations with respect to Senior Debt (as provided
   in clause (i) above) are paid in full, any distribution to which Holders
   would be entitled but for this Article 10 shall be made to holders of Senior
   Debt (except that Holders of Notes may receive (A) Permitted Junior
   Securities and (B) payments and other distributions made from any defeasance
   trust created pursuant to Section 8.01 hereof), as their interests may
   appear.

Section 10.03.  Default on Designated Senior Debt.

      (a) The Company may not make any payment or distribution to the Trustee or
any Holder in respect of Obligations with respect to the Notes and may not
acquire from the Trustee or any Holder any Notes for cash or property (other
than (A) Permitted Junior Securities and (B) payments and other distributions
made from any defeasance trust created pursuant to Section 8.01 hereof) until
all principal and other Obligations with respect to the Senior Debt have been
paid in full if:

          (i)   a default in the payment of any principal or other Obligations
   with respect to Designated Senior Debt occurs and is continuing beyond any
   applicable grace period in the agreement, indenture or other document
   governing such Designated Senior Debt; or

          (ii)  a default, other than a payment default, on Designated Senior
   Debt occurs and is continuing that then permits holders of the Designated
   Senior Debt to accelerate its maturity and the Trustee receives a notice of
   the default (a "Payment Blockage Notice") from a Person who may

                                       75
<PAGE>
 
   give it pursuant to Section 10.11 hereof. If the Trustee receives any such
   Payment Blockage Notice, no subsequent Payment Blockage Notice shall be
   effective for purposes of this Section unless and until (A) at least 360 days
   shall have elapsed since the effectiveness of the immediately prior Payment
   Blockage Notice and (B) all scheduled payments of principal, premium, if any,
   and interest on the Securities that have come due have been paid in full in
   cash. No nonpayment default that existed or was continuing on the date of
   delivery of any Payment Blockage Notice to the Trustee shall be, or be made,
   the basis for a subsequent Payment Blockage Notice.

      (b) The Company may and shall resume payments on and distributions in
respect of the Notes and may acquire them upon the earlier of:

         (i)  the date upon which the default is cured or waived, or

         (ii) in the case of a default referred to in clause (ii) of Section
   10.03(a) hereof, 179 days pass after notice is received if the maturity of
   such Designated Senior Debt has not been accelerated,

if this Article 10 otherwise permits the payment, distribution or acquisition at
the time of such payment or acquisition.

Section 10.04.  Acceleration of Securities.

      If payment of the Securities is accelerated because of an Event of
Default, the Company shall promptly notify holders of Senior Debt of the
acceleration.

Section 10.05.  When Distribution Must Be Paid Over.

      In the event that the Trustee or any Holder receives any payment of any
Obligations with respect to the Notes at a time when the Trustee or such Holder,
as applicable, has actual knowledge that such payment is prohibited by Section
10.03 hereof, such payment shall be held by the Trustee or such Holder, in trust
for the benefit of, and shall be paid forthwith over and delivered, upon written
request, to, the holders of Senior Debt as their interests may appear or their
Representative under the indenture or other agreement (if any) pursuant to which
Senior Debt may have been issued, as their respective interests may appear, for
application to the payment of all Obligations with respect to Senior Debt
remaining unpaid to the extent necessary to pay such Obligations in full in
accordance with their terms, after giving effect to any concurrent payment or
distribution to or for the holders of Senior Debt.

      With respect to the holders of Senior Debt, the Trustee undertakes to
perform only such obligations on the part of the Trustee as are specifically set
forth in this Article 10, and no implied covenants or obligations with respect
to the holders of Senior Debt shall be read into this Indenture against the
Trustee.  The Trustee shall not be deemed to owe any fiduciary duty to the
holders of Senior Debt, and shall not be liable to any such holders if the
Trustee shall pay over or distribute to or on behalf of Holders or the Company
or any other Person money or assets to which any holders of Senior Debt shall be
entitled by virtue of this Article 10, except if such payment is made as a
result of the willful misconduct or gross negligence of the Trustee.

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<PAGE>
 
Section 10.06.  Notice by Company.

      The Company shall promptly notify the Trustee and the Paying Agent of any
facts known to the Company that would cause a payment of any Obligations with
respect to the Notes to violate this Article 10, but failure to give such notice
shall not affect the subordination of the Notes to the Senior Debt as provided
in this Article 10.

Section 10.07.  Subrogation.

      After all Senior Debt is paid in full and until the Notes are paid in
full, Holders of Notes shall be subrogated (equally and ratably with all other
Indebtedness pari passu with the Notes) to the rights of holders of Senior Debt
to receive distributions applicable to Senior Debt to the extent that
distributions otherwise payable to the Holders of Notes have been applied to the
payment of Senior Debt.  A distribution made under this Article 10 to holders of
Senior Debt that otherwise would have been made to Holders of Notes is not, as
between the Company and Holders, a payment by the Company on the Notes.

Section 10.08.  Relative Rights.

      This Article 10 defines the relative rights of Holders of Notes and
holders of Senior Debt.  Nothing in this Indenture shall:

         (i)    impair, as between the Company and Holders of Notes, the
   obligation of the Company, which is absolute and unconditional, to pay
   principal of and interest on the Notes in accordance with their terms;

         (ii)   affect the relative rights of Holders of Notes and creditors of
   the Company other than their rights in relation to holders of Senior Debt; or

         (iii)  prevent the Trustee or any Holder of Notes from exercising its
   available remedies upon a Default or Event of Default, subject to the rights
   of holders and owners of Senior Debt to receive distributions and payments
   otherwise payable to Holders of Notes.

      If the Company fails because of this Article 10 to pay principal of or
interest on a Note on the due date, the failure is still a Default or Event of
Default.

Section 10.09.  Subordination May Not Be Impaired by Company.

      No right of any holder of Senior Debt to enforce the subordination of the
Indebtedness evidenced by the Notes shall be impaired by any act or failure to
act by the Company or any Holder or by the failure of the Company or any Holder
to comply with this Indenture.

Section 10.10.  Distribution or Notice to Representative.

      Whenever a distribution is to be made or a notice given to holders of
Senior Debt, the distribution may be made and the notice given to their
Representative.

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<PAGE>
 
      Upon any payment or distribution of assets of the Company referred to in
this Article 10, the Trustee and the Holders of Notes shall be entitled to rely
upon any order or decree made by any court of competent jurisdiction or upon any
certificate of such Representative or of the liquidating trustee or agent or
other Person making any distribution to the Trustee or to the Holders of Notes
for the purpose of ascertaining the Persons entitled to participate in such
distribution, the holders of the Senior Debt and other Indebtedness of the
Company, the amount thereof or payable thereon, the amount or amounts paid or
distributed thereon and all other facts pertinent thereto or to this Article 10.

Section 10.11.  Rights of Trustee and Paying Agent.

      Notwithstanding the provisions of this Article 10 or any other provision
of this Indenture, the Trustee shall not be charged with knowledge of the
existence of any facts that would prohibit the making of any payment or
distribution by the Trustee, and the Trustee and the Paying Agent may continue
to make payments on the Notes, unless the Trustee shall have received at its
Corporate Trust Office at least five Business Days prior to the date of such
payment written notice of facts that would cause the payment of any Obligations
with respect to the Notes to violate this Article 10.  Only the Company or a
Representative may give the notice.  Nothing in this Article 10 shall impair the
claims of, or payments to, the Trustee under or pursuant to Section 7.07 hereof.

      The Trustee in its individual or any other capacity may hold Senior Debt
with the same rights it would have if it were not Trustee.  Any Agent may do the
same with like rights.

Section 10.12.  Authorization to Effect Subordination.

      Each Holder of Notes, by the Holder's acceptance thereof, authorizes and
directs the Trustee on such Holder's behalf to take such action as may be
necessary or appropriate to effectuate the subordination as provided in this
Article 10, and appoints the Trustee to act as such Holder's attorney-in-fact
for any and all such purposes.  If the Trustee does not file a proper proof of
claim or proof of debt in the form required in any proceeding referred to in
Section 6.09 hereof at least 30 days before the expiration of the time to file
such claim, the Representatives are hereby authorized to file an appropriate
claim for and on behalf of the Holders of the Notes.

Section 10.13.  Amendments.

      The provisions of this Article 10 and Section 11.02 shall not be amended
or modified without the written consent of the holders of all Senior Debt.

Section 10.14.  Trustee Not Fiduciary for Holders of Senior Debt.

      The Trustee shall not be deemed to owe any fiduciary duty to the holders
of Senior Debt and shall not be liable to any such holders if the Trustee shall
in good faith mistakenly pay over or distribute to Holders of Notes or to the
Company or to any other person cash, property or securities to which any holders
of Senior Debt shall be entitled by virtue of this Article 10 or otherwise.
With respect to the holders of Senior Debt, the Trustee undertakes to perform or
to observe only such of its covenants or

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<PAGE>
 
obligations as are specifically set forth in this Article 10 and no implied
covenants or obligations with respect to holders of Senior Debt shall be read
into this Indenture against the Trustee.

                                  ARTICLE 11
                             SUBSIDIARY GUARANTEES

Section 11.01.  Guarantee.

      Subject to this Article 11, each of the Subsidiary Guarantors hereby,
jointly and severally, unconditionally guarantees to each Holder of a Note
authenticated and delivered by the Trustee and to the Trustee and its successors
and assigns, irrespective of the validity and enforceability of this Indenture,
the Notes or the obligations of the Company hereunder or thereunder, that: (a)
the principal of and interest on the Notes will be promptly paid in full when
due, whether at maturity, by acceleration, redemption or otherwise, and interest
on the overdue principal of and interest on the Notes, if any, if lawful, and
all other obligations of the Company to the Holders or the Trustee hereunder or
thereunder will be promptly paid in full or performed, all in accordance with
the terms hereof and thereof; and (b) in case of any extension of time of
payment or renewal of any Notes or any of such other obligations, that same will
be promptly paid in full when due or performed in accordance with the terms of
the extension or renewal, whether at stated maturity, by acceleration or
otherwise. Failing payment when due of any amount so guaranteed or any
performance so guaranteed for whatever reason, the Subsidiary Guarantors shall
be jointly and severally obligated to pay the same immediately. Each Subsidiary
Guarantor agrees that this is a guarantee of payment and not a guarantee of
collection.

      The Subsidiary Guarantors hereby agree that their obligations hereunder
shall be unconditional, irrespective of the validity, regularity or
enforceability of the Notes or this Indenture, the absence of any action to
enforce the same, any waiver or consent by any Holder of the Notes with respect
to any provisions hereof or thereof, the recovery of any judgment against the
Company, any action to enforce the same or any other circumstance which might
otherwise constitute a legal or equitable discharge or defense of a guarantor.
Each Subsidiary Guarantor hereby waives diligence, presentment, demand of
payment, filing of claims with a court in the event of insolvency or bankruptcy
of the Company, any right to require a proceeding first against the Company,
protest, notice and all demands whatsoever and covenant that this Subsidiary
Guarantee shall not be discharged except by complete performance of the
obligations contained in the Notes and this Indenture.

      If any Holder or the Trustee is required by any court or otherwise to
return to the Company, the Subsidiary Guarantors or any custodian, trustee,
liquidator or other similar official acting in relation to either the Company or
the Subsidiary Guarantors, any amount paid by either to the Trustee or such
Holder, this Subsidiary Guarantee, to the extent theretofore discharged, shall
be reinstated in full force and effect.

      Each Subsidiary Guarantor agrees that it shall not be entitled to any
right of subrogation in relation to the Holders in respect of any obligations
guaranteed hereby until payment in full of all obligations guaranteed hereby.
Each Subsidiary Guarantor further agrees that, as between the Subsidiary

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<PAGE>
 
Guarantors, on the one hand, and the Holders and the Trustee, on the other hand,
(x) the maturity of the obligations guaranteed hereby may be accelerated as
provided in Article 6 hereof for the purposes of this Subsidiary Guarantee,
notwithstanding any stay, injunction or other prohibition preventing such
acceleration in respect of the obligations guaranteed hereby, and (y) in the
event of any declaration of acceleration of such obligations as provided in
Article 6 hereof, such obligations (whether or not due and payable) shall
forthwith become due and payable by the Subsidiary Guarantors for the purpose of
this Subsidiary Guarantee.  The Subsidiary Guarantors shall have the right to
seek contribution from any non-paying Subsidiary Guarantor so long as the
exercise of such right does not impair the rights of the Holders under the
Guarantee.

Section 11.02.  Subordination of Subsidiary Guarantee.

      The Obligations of each Subsidiary Guarantor under its Subsidiary
Guarantee pursuant to this Article 11 shall be junior and subordinated to the
Senior Debt of such Subsidiary Guarantor on the same basis as the Notes are
junior and subordinated to Senior Debt of the Company.  For the purposes of the
foregoing sentence, the Trustee and the Holders shall have the right to receive
and/or retain payments by any of the Subsidiary Guarantors only at such times as
they may receive and/or retain payments in respect of the Notes pursuant to this
Indenture, including Article 10 hereof.

Section 11.03.  Limitation on Guarantor Liability.

      Each Subsidiary Guarantor, and by its acceptance of Notes, each Holder,
hereby confirms that it is the intention of all such parties that the Subsidiary
Guarantee of such Subsidiary Guarantor not constitute a fraudulent transfer or
conveyance for purposes of Bankruptcy Law, the Uniform Fraudulent Conveyance
Act, the Uniform Fraudulent Transfer Act or any similar federal or state law to
the extent applicable to any Subsidiary Guarantee. To effectuate the foregoing
intention, the Trustee, the Holders and the Subsidiary Guarantors hereby
irrevocably agree that the obligations of such Subsidiary Guarantor will, after
giving effect to such maximum amount and all other contingent and fixed
liabilities of such Subsidiary Guarantor that are relevant under such laws, and
after giving effect to any collections from, rights to receive contribution from
or payments made by or on behalf of any other Subsidiary Guarantor in respect of
the obligations of such other Subsidiary Guarantor under this Article 11, result
in the obligations of such Subsidiary Guarantor under its Subsidiary Guarantee
not constituting a fraudulent transfer or conveyance.

Section 11.04.  Execution and Delivery of Subsidiary Guarantee.

      To evidence its Subsidiary Guarantee set forth in Section 11.01, each
Subsidiary Guarantor hereby agrees that a notation of such Subsidiary Guarantee
substantially in the form included in Exhibit E shall be endorsed by an Officer
of such Subsidiary Guarantor on each Note authenticated and delivered by the
Trustee and that this Indenture shall be executed on behalf of such Subsidiary
Guarantor by its President or one of its Vice Presidents.

      Each Subsidiary Guarantor hereby agrees that its Subsidiary Guarantee set
forth in Section 11.01 shall remain in full force and effect notwithstanding any
failure to endorse on each Note a notation of such Subsidiary Guarantee.

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<PAGE>
 
      If an Officer whose signature is on this Indenture or on the Subsidiary
Guarantee no longer holds that office at the time the Trustee authenticates the
Note on which a Subsidiary Guarantee is endorsed, the Subsidiary Guarantee shall
be valid nevertheless.

      The delivery of any Note by the Trustee, after the authentication thereof
hereunder, shall constitute due delivery of the Subsidiary Guarantee set forth
in this Indenture on behalf of the Subsidiary Guarantors.

      In the event that the Company creates or acquires any new Subsidiaries
subsequent to the date of this Indenture, if required by Section 4.20 hereof,
the Company shall cause such Subsidiaries to execute supplemental indentures to
this Indenture and Subsidiary Guarantees in accordance with Section 4.20 hereof
and this Article 11, to the extent applicable.

Section 11.05.  Subsidiary Guarantors May Consolidate, etc., on Certain Terms.

      Except as otherwise provided in Section 11.06, no Subsidiary Guarantor may
consolidate with or merge with or into (whether or not such Subsidiary Guarantor
is the surviving Person) another Person whether or not affiliated with such
Subsidiary Guarantor unless:

      (a) subject to Section 11.06 hereof, the Person formed by or surviving any
such consolidation or merger (if other than a Subsidiary Guarantor or the
Company) unconditionally assumes all the obligations of such Subsidiary
Guarantor, pursuant to operation of law or a supplemental indenture in form

and substance reasonably satisfactory to the Trustee, under the Notes, this
Indenture and the Subsidiary Guarantee on the terms set forth herein or therein;
and

      (b) immediately after giving effect to such transaction, no Default or
Event of Default exists.

      In case of any such consolidation, merger, sale or conveyance and upon the
assumption by the successor Person, by operation of law or supplemental
indenture, executed and delivered to the Trustee and satisfactory in form to the
Trustee, of the Subsidiary Guarantee endorsed upon the Notes and the due and
punctual performance of all of the covenants and conditions of this Indenture to
be performed by the Subsidiary Guarantor, such successor Person shall succeed to
and be substituted for the Subsidiary Guarantor with the same effect as if it
had been named herein as a Subsidiary Guarantor.  Such successor Person shall,
as soon as reasonably practicable upon such consolidation, merger, sale or
conveyance, execute and deliver to the Trustee a supplemental indenture
satisfactory in form to the Trustee.  Such successor Person thereupon may cause
to be signed any or all of the Subsidiary Guarantees to be endorsed upon all of
the Notes issuable hereunder which theretofore shall not have been signed by the
Company and delivered to the Trustee.  All the Subsidiary Guarantees so issued
shall in all respects have the same legal rank and benefit under this Indenture
as the Subsidiary Guarantees theretofore and thereafter issued in accordance
with the terms of this Indenture as though all of such Subsidiary Guarantees had
been issued at the date of the execution hereof.

      Except as set forth in Articles 4 and 5 hereof, and notwithstanding
clauses (a) and (b) above, nothing contained in this Indenture or in any of the
Notes shall prevent any consolidation or merger of a Subsidiary Guarantor with
or into the Company or another Subsidiary Guarantor, or shall prevent any

                                       81
<PAGE>
 
sale or conveyance of the property of a Guarantor as an entirety or
substantially as an entirety to the Company or another Subsidiary Guarantor.

Section 11.06.  Releases Following Sale of Assets.

      In the event of a sale or other disposition of all of the assets of any
Subsidiary Guarantor, by way of merger, consolidation or otherwise, or a sale or
other disposition of all to the capital stock of any Subsidiary Guarantor, in
each case to a Person that is not (either before or after giving effect to such
transactions) a Restricted Subsidiary of the Company, then such Subsidiary
Guarantor (in the event of a sale or other disposition, by way of merger,
consolidation or otherwise, of all of the capital stock of such Subsidiary
Guarantor) or the corporation acquiring the property (in the event of a sale or
other disposition of all or substantially all of the assets of such Subsidiary
Guarantor) will be released and relieved of any obligations under its Subsidiary
Guarantee; provided that the Net Proceeds of such sale or other disposition are
applied in accordance with the applicable provisions of this Indenture,
including without limitation Section 4.10 hereof.  Upon delivery by the Company
to the Trustee of an Officers' Certificate and an Opinion of Counsel to the
effect that such sale or other disposition was made by the Company in accordance
with the provisions of this Indenture, including without limitation Section 4.10
hereof, the Trustee shall execute any documents reasonably required in order to
evidence the release of any Subsidiary Guarantor from its obligations under its
Subsidiary Guarantee.

      In the event the Company designates a Restricted Subsidiary to become an
Unrestricted Subsidiary in accordance with this Indenture, then such Restricted
Subsidiary shall, in accordance with this Indenture, be released from its
obligations under its Subsidiary Guarantee upon the effectiveness of such
designation.

      Any Subsidiary Guarantor not released from its obligations under its
Subsidiary Guarantee shall remain liable for the full amount of principal of and
interest on the Notes and for the other obligations of any Guarantor under this
Indenture as provided in this Article 11.

                                  ARTICLE 12
                                 MISCELLANEOUS

Section 12.01.  Trust Indenture Act Controls.

      If any provision of this Indenture limits, qualifies or conflicts with the
duties imposed by TIA (S)318(c), the imposed duties shall control.

Section 12.02.  Notices.

      Any notice or communication by the Company, any Subsidiary Guarantor or
the Trustee to the others is duly given if in writing and delivered in Person or
mailed by first class mail (registered or certified, return receipt requested),
telecopier or overnight air courier guaranteeing next day delivery, to the
others' address:

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      If to the Company and/or any Subsidiary Guarantor:

      Great Lakes Dredge & Dock Corporation
      2122 York Road
      Oak Brook, Illinois 60521
      Telecopier No.: (630) 574-3007
      Attention: President

      With a copy to:

      Dechert Price & Rhoads
      4000 Bell Atlantic Tower
      1717 Arch Street
      Philadelphia, Pennsylvania 19103
      Telecopier No.: (215) 994-2222
      Attention: G. Daniel O'Donnell, Esq.


      If to the Trustee:

      The Bank of New York
      101 Barclay Street, Floor 21 West
      New York, New York  10286
      Telecopier No.: (212) 815-5915
      Attention: Corporate Trust Trustee Administration

      The Company, any Subsidiary Guarantor or the Trustee, by notice to the
others may designate additional or different addresses for subsequent notices or
communications.

      All notices and communications (other than those sent to Holders) shall be
deemed to have been duly given: at the time delivered by hand, if personally
delivered; five Business Days after being deposited in the mail, postage
prepaid, if mailed; when receipt acknowledged, if telecopied; and the next
Business Day after timely delivery to the courier, if sent by overnight air
courier guaranteeing next day delivery.

      Any notice or communication to a Holder shall be mailed by first class
mail, certified or registered, return receipt requested, or by overnight air
courier guaranteeing next day delivery to its address shown on the register kept
by the Registrar.  Any notice or communication shall also be so mailed to any
Person described in TIA (S) 313(c), to the extent required by the TIA.  Failure
to mail a notice or communication to a Holder or any defect in it shall not
affect its sufficiency with respect to other Holders.

      If a notice or communication is mailed in the manner provided above within
the time prescribed, it is duly given, whether or not the addressee receives it.

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<PAGE>
 
      If the Company mails a notice or communication to Holders, it shall mail a
copy to the Trustee and each Agent at the same time.

Section 12.03.  Communication by Holders of Notes with Other Holders of Notes.

      Holders may communicate pursuant to TIA (S) 312(b) with other Holders with
respect to their rights under this Indenture or the Notes.  The Company, the
Trustee, the Registrar and anyone else shall have the protection of TIA (S)
312(c).

Section 12.04.  Certificate and Opinion as to Conditions Precedent.

      Upon any request or application by the Company to the Trustee to take any
action under this Indenture, the Company shall furnish to the Trustee:

      (a) an Officers' Certificate in form and substance reasonably satisfactory
to the Trustee (which shall include the statements set forth in Section 12.05
hereof) stating that, in the opinion of the signers, all conditions precedent
and covenants, if any, provided for in this Indenture relating to the proposed
action have been satisfied; and

      (b) an Opinion of Counsel in form and substance reasonably satisfactory to
the Trustee (which shall include the statements set forth in Section 12.05
hereof) stating that, in the opinion of such counsel, all such conditions
precedent and covenants have been satisfied.

Section 12.05.  Statements Required in Certificate or Opinion.

      Each certificate or opinion with respect to compliance with a condition or
covenant provided for in this Indenture (other than a certificate provided
pursuant to TIA (S) 314(a)(4)) shall comply with the provisions of TIA (S)
314(e) and shall include:

      (a) a statement that the Person making such certificate or opinion has
read such covenant or condition;

      (b) a brief statement as to the nature and scope of the examination or
investigation upon which the statements or opinions contained in such
certificate or opinion are based;

      (c) a statement that, in the opinion of such Person, he or she has made
such examination or investigation as is necessary to enable him to express an
informed opinion as to whether or not such covenant or condition has been
satisfied; and

      (d) a statement as to whether or not, in the opinion of such Person, such
condition or covenant has been satisfied.

Section 12.06.  Rules by Trustee and Agents.

      The Trustee may make reasonable rules for action by or at a meeting of
Holders.  The Registrar or Paying Agent may make reasonable rules and set
reasonable requirements for its functions.

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<PAGE>
 
Section 12.07.  No Personal Liability of Directors, Officers, Employees and
Stockholders.

      No past, present or future director, officer, employee, incorporator or
stockholder of the Company or any Subsidiary Guarantor, as such, shall have any
liability for any obligations of the Company or such Subsidiary Guarantor under
the Notes, the Subsidiary Guarantees, this Indenture or for any claim based on,
in respect of, or by reason of, such obligations or their creation.  Each Holder
by accepting a Note waives and releases all such liability.  The waiver and
release are part of the consideration for issuance of the Notes.

Section 12.08.  Governing Law.

      THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO
CONSTRUE THIS INDENTURE, THE NOTES AND THE SUBSIDIARY GUARANTEES WITHOUT GIVING
EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE
APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

Section 12.09.  No Adverse Interpretation of Other Agreements.

      This Indenture may not be used to interpret any other indenture, loan or
debt agreement of the Company or its Subsidiaries or of any other Person.  Any
such indenture, loan or debt agreement may not be used to interpret this
Indenture.

Section 12.10.  Successors.

      All agreements of the Company in this Indenture and the Notes shall bind
its successors.  All agreements of the Trustee in this Indenture shall bind its
successors.  All agreements of each Subsidiary Guarantor in this Indenture shall
bind its successors, except as otherwise provided in Section 11.06.

Section 12.11.  Severability.

      In case any provision in this Indenture or in the Notes shall be invalid,
illegal or unenforceable, the validity, legality and enforceability of the
remaining provisions shall not in any way be affected or impaired thereby.

Section 12.12.  Counterpart Originals.

      The parties may sign any number of copies of this Indenture.  Each signed
copy shall be an original, but all of them together represent the same
agreement.

Section 12.13.  Table of Contents, Headings, etc.

      The Table of Contents, Cross-Reference Table and Headings of the Articles
and Sections of this Indenture have been inserted for convenience of reference
only, are not to be considered a part of this Indenture and shall in no way
modify or restrict any of the terms or provisions hereof.

                                       85
<PAGE>
 
                        [Signatures on following page]

                                       86
<PAGE>
 
                                  SIGNATURES

Dated as of August 19, 1998

                                  GREAT LAKES DREDGE & DOCK CORPORATION

                                  By: /s/ Douglas B. Mackie
                                      ---------------------
                                  Name: Douglas B. Mackie
                                  Title: President and C.E.O.

                                  GREAT LAKES INTERNATIONAL, INC.

                                  By: /s/ Douglas B. Mackie
                                      ---------------------
                                  Name: Douglas B. Mackie
                                  Title: President and C.E.O.

                                  GREAT LAKES DREDGE & DOCK COMPANY

                                  By: /s/ Douglas B. Mackie
                                      ---------------------
                                  Name: Douglas B. Mackie
                                  Title: President and C.E.O.

                                  DAWSON DREDGING

                                  By: /s/ Douglas B. Mackie
                                      ---------------------
                                  Name: Douglas B. Mackie
                                  Title: President and C.E.O.

                                  FIFTY-THREE DREDGING CORPORATION

                                  By: /s/ Douglas B. Mackie
                                      ---------------------
                                  Name: Douglas B. Mackie
                                  Title: President and C.E.O.
<PAGE>
 
                                 GATES CONSTRUCTION CORP.

                                 By: /s/ Douglas B. Mackie
                                     ---------------------
                                 Name: Douglas B. Mackie
                                 Title: President and C.E.O.

                                 THE BANK OF NEW YORK, AS TRUSTEE

                                 By: /s/ Iliana Acevedo
                                     ------------------
                                 Name: Iliana Acevedo
                                 Title: Assistant Treasurer
<PAGE>
 
                                                                   EXHIBIT A1

                                [Face of Note]
- --------------------------------------------------------------------------------

                                                            CUSIP/CINS 390606AA9

        11 1/4% [Series A] [Series B] Senior Subordinated Notes due 2008

No.  ___                                                            $115,000,000

                     GREAT LAKES DREDGE & DOCK CORPORATION

promises to pay to Cede & Co., or registered assigns, the principal sum of One
Hundred Fifteen Million Dollars on August 19, 2008.

Interest Payment Dates:  February 15 and August 15

Record Dates:  February 1 and August 1

Dated: August 19, 1998

                                 GREAT LAKES DREDGE & DOCK CORPORATION

                                 By:____________________________________
                                 Name:
                                 Title:


This is one of the Notes referred to
in the within-mentioned Indenture:

THE BANK OF NEW YORK,

 as Trustee

By:________________________________
Name:
Title:

- --------------------------------------------------------------------------------

                                     A1-1
<PAGE>
 
                                [Back of Note]

       11 1/4% [Series A] [Series B] Senior Subordinated Notes due 2008

THIS GLOBAL NOTE IS HELD BY THE DEPOSITARY (AS DEFINED IN THE INDENTURE
GOVERNING THIS NOTE) OR ITS NOMINEE IN CUSTODY FOR THE BENEFIT OF THE BENEFICIAL
OWNERS HEREOF, AND IS NOT TRANSFERABLE TO ANY PERSON UNDER ANY CIRCUMSTANCES
EXCEPT THAT (I) THE TRUSTEE MAY MAKE SUCH NOTATIONS HEREON AS MAY BE REQUIRED
PURSUANT TO SECTION 2.07 OF THE INDENTURE, (II) THIS GLOBAL NOTE MAY BE
EXCHANGED IN WHOLE BUT NOT IN PART PURSUANT TO SECTION 2.06(a) OF THE INDENTURE,
(III) THIS GLOBAL NOTE MAY BE DELIVERED TO THE TRUSTEE FOR CANCELLATION PURSUANT
TO SECTION 2.11 OF THE INDENTURE AND (IV) THIS GLOBAL NOTE MAY BE TRANSFERRED TO
A SUCCESSOR DEPOSITARY WITH THE PRIOR WRITTEN CONSENT OF THE COMPANY.

THE SECURITY (OR ITS PREDECESSOR) EVIDENCED HEREBY WAS ORIGINALLY ISSUED IN A
TRANSACTION EXEMPT FROM REGISTRATION UNDER SECTION 5 OF THE UNITED STATES
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND THE SECURITY
EVIDENCED HEREBY MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE
ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM.  EACH
PURCHASER OF THE SECURITY EVIDENCED HEREBY IS HEREBY NOTIFIED THAT THE SELLER
MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE
SECURITIES ACT PROVIDED BY RULE 144A OR REGULATION S THEREUNDER.  THE HOLDER OF
THE SECURITY EVIDENCED HEREBY AGREES FOR THE BENEFIT OF THE COMPANY THAT (A)
SUCH SECURITY MAY BE RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (1)(a) IN
THE UNITED STATES TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED
INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A
TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (b) IN A TRANSACTION MEETING
THE REQUIREMENTS OF RULE 144 UNDER THE SECURITIES ACT, (c) OUTSIDE THE UNITED
STATES TO A NON U.S. PERSON IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE
904 UNDER THE SECURITIES ACT, (d) TO AN INSTITUTIONAL "ACCREDITED INVESTOR" AS
DEFINED IN RULE 501(A)(1), (2), (3) OR (7) OF THE SECURITIES ACT (AN
"INSTITUTIONAL ACCREDITED INVESTOR") THAT, PRIOR TO SUCH TRANSFER, FURNISHES THE
TRUSTEE A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS (THE
FORM OF WHICH CAN BE OBTAINED FROM THE TRUSTEE) AND, IF SUCH TRANSFER IS IN
RESPECT OF AN AGGREGATE PRINCIPAL AMOUNT OF SECURITIES LESS THAN $250,000, AN
OPINION OF COUNSEL THAT SUCH TRANSFER IS IN COMPLIANCE WITH THE SECURITIES ACT
OR (e) IN ACCORDANCE WITH ANOTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS
OF THE SECURITIES ACT (AND BASED UPON AN OPINION OF COUNSEL IF THE COMPANY SO
REQUESTS), (2) TO THE COMPANY OR (3) PURSUANT TO AN EFFECTIVE REGISTRATION
STATEMENT AND, IN EACH CASE, IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS
OF ANY STATE OF THE UNITED STATES OR ANY OTHER APPLICABLE JURISDICTION AND (B)
THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY

                                     A1-2
<PAGE>
 
PURCHASER FROM IT OF THE SECURITY EVIDENCED HEREBY OF THE RESALE RESTRICTIONS
SET FORTH IN (A) ABOVE.

      Capitalized terms used herein shall have the meanings assigned to them in
the Indenture referred to below unless otherwise indicated.

      1.  Interest.  Great Lakes Dredge & Dock Corporation, a Delaware
corporation (the "Company"), promises to pay interest on the principal amount of
this Note at 11 1/4% per annum from August 19, 1998 until maturity and shall pay
the Liquidated Damages payable pursuant to Section 5 of the Registration Rights
Agreement referred to below. The Company will pay interest and Liquidated
Damages semi-annually in arrears on February 15 and August 15 of each year, or
if any such day is not a Business Day, on the next succeeding Business Day (each
an "Interest Payment Date"). Interest on the Notes will accrue from the most
recent date to which interest has been paid or, if no interest has been paid,
from the date of issuance; provided that if there is no existing Default in the
payment of interest, and if this Note is authenticated between a record date
referred to on the face hereof and the next succeeding Interest Payment Date,
interest shall accrue from such next succeeding Interest Payment Date; provided,
further, that the first Interest Payment Date shall be February 15, 1999. The
Company shall pay interest (including post-petition interest in any proceeding
under any Bankruptcy Law) on overdue principal and premium, if any, from time to
time on demand at a rate that is 1% per annum in excess of the rate then in
effect; it shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue installments of interest and
Liquidated Damages (without regard to any applicable grace periods) from time to
time on demand at the same rate to the extent lawful. Interest will be computed
on the basis of a 360-day year of twelve 30-day months.

      2.  Method of Payment.  The Company will pay interest on the Notes (except
defaulted interest) and Liquidated Damages to the Persons who are registered
Holders of Notes at the close of business on the February 1 or August 1 next
preceding the Interest Payment Date, even if such Notes are canceled after such
record date and on or before such Interest Payment Date, except as provided in
Section 2.12 of the Indenture with respect to defaulted interest. The Notes will
be payable as to principal, premium and Liquidated Damages, if any, and interest
at the office or agency of the Company maintained for such purpose within or
without the City and State of New York, or, at the option of the Company,
payment of interest and Liquidated Damages may be made by check mailed to the
Holders at their addresses set forth in the register of Holders, and provided
that payment by wire transfer of immediately available funds will be required
with respect to principal of and interest, premium and Liquidated Damages on,
all Global Notes and all other Notes the Holders of which shall have provided
wire transfer instructions to the Company or the Paying Agent. Such payment
shall be in such coin or currency of the United States of America as at the time
of payment is legal tender for payment of public and private debts.

      3.  Paying Agent and Registrar. Initially, The Bank of New York, the
Trustee under the Indenture, will act as Paying Agent and Registrar. The Company
may change any Paying Agent or Registrar without notice to any Holder. The
Company or any of its Subsidiaries may act in any such capacity.

                                     A1-3
<PAGE>
 
      4.  Indenture. The Company issued the Notes under an Indenture dated as of
August 19, 1998 ("Indenture") between the Company and the Trustee. The terms of
the Notes include those stated in the Indenture and those made part of the
Indenture by reference to the Trust Indenture Act of 1939, as amended (15 U.S.
Code (S)(S) 77aaa-77bbbb). The Notes are subject to all such terms, and Holders
are referred to the Indenture and such Act for a statement of such terms. To the
extent any provision of this Note conflicts with the express provisions of the
Indenture, the provisions of the Indenture shall govern and be controlling. The
Notes are obligations of the Company limited to $115.0 million in aggregate
principal amount.

      5.  Optional Redemption.

      (a) Except as set forth in clause (b) of this Paragraph 5, the Company
shall not have the option to redeem the Notes pursuant to this Paragraph 5 prior
to August 15, 2003.  Thereafter, the Company shall have the option to redeem the
Notes, in whole or in part, upon not less than 30 nor more than 60 days' notice,
in cash at the redemption prices (expressed as percentages of principal amount)
set forth below plus accrued and unpaid interest and Liquidated Damages thereon,
if any, to the applicable redemption date, if redeemed during the twelve-month
period beginning on August 15 of the years indicated below:

     Year                                                 Percentage
     ----                                                 ----------

     2003..............................................   105.625%
     2004..............................................   103.750%
     2005..............................................   101.875%
     2006 and thereafter...............................   100.000%

      (b) Notwithstanding the provisions of subparagraph (a) of this Paragraph
5, at any time prior to August 15, 2001, the Company may (but will not have the
obligation to) on any one or more occasions redeem up to 35% of the aggregate
principal amount of Notes originally issued at a redemption price equal to
111.250% of the principal amount thereof, plus accrued and unpaid interest and
Liquidated Damages, if any, thereon to the redemption date, with the net cash
proceeds of one or more Public Equity Offerings; provided that at least 65% of
the aggregate principal amount of Notes originally issued remain outstanding
immediately after the occurrence of such redemption (excluding Notes held by the
Company and its Subsidiaries); and provided, further, that such redemption shall
occur within 180 days of the date of the closing of such Public Equity Offering.

      6.  Mandatory Redemption.

      Except as set forth in paragraph 7 below, the Company shall not be
required to make mandatory redemption payments with respect to the Notes.

      7.  Repurchase At Option Of Holder.

      (a) If there is a Change of Control, the Company shall be required to make
an offer (a "Change of Control Offer") to repurchase all or any part (equal to
$1,000 or an integral multiple thereof)

                                     A1-4
<PAGE>
 
of each Holder's Notes at a purchase price equal to 101% of the aggregate
principal amount thereof plus accrued and unpaid interest and Liquidated Damages
thereon, if any, to the date of purchase (the "Change of Control Payment").
Within 30 days following any Change of Control, the Company shall mail a notice
to each Holder setting forth the procedures governing the Change of Control
Offer as required by the Indenture.

      (b) If the Company or a Subsidiary consummates any Asset Sales, within
five days of each date on which the aggregate amount of Excess Proceeds exceeds
$10.0 million, the Company shall commence an offer to all Holders of Notes (as
"Asset Sale Offer") pursuant to Section 3.09 of the Indenture to purchase the
maximum principal amount of Notes (including any Additional Notes) that may be
purchased out of the Excess Proceeds at an offer price in cash in an amount
equal to 100% of the principal amount thereof plus accrued and unpaid interest
and Liquidated Damages thereon, if any, to the date fixed for the closing of
such offer, in accordance with the procedures set forth in the Indenture.  To
the extent that the aggregate amount of Notes (including any Additional Notes)
tendered pursuant to an Asset Sale Offer is less than the Excess Proceeds, the
Company (or such Subsidiary) may use such deficiency for general corporate
purposes.  If the aggregate principal amount of Notes surrendered by Holders
thereof exceeds the amount of Excess Proceeds, the Trustee shall select the
Notes to be purchased on a pro rata basis.  Holders of Notes that are the
subject of an offer to purchase will receive an Asset Sale Offer from the
Company prior to any related purchase date and may elect to have such Notes
purchased by completing the form entitled "Option of Holder to Elect Purchase"
on the reverse of the Notes.

      8.  Notice Of Redemption.  Notice of redemption will be mailed at least 30
days but not more than 60 days before the redemption date to each Holder whose
Notes are to be redeemed at its registered address.  Notes in denominations
larger than $1,000 may be redeemed in part but only in whole multiples of
$1,000, unless all of the Notes held by a Holder are to be redeemed.  On and
after the redemption date interest ceases to accrue on Notes or portions thereof
called for redemption.

      9.  Denominations, Transfer, Exchange.  The Notes are in registered form
without coupons in denominations of $1,000 and integral multiples of $1,000.
The transfer of Notes may be registered and Notes may be exchanged as provided
in the Indenture.  The Registrar and the Trustee may require a Holder, among
other things, to furnish appropriate endorsements and transfer documents and the
Company may require a Holder to pay any taxes and fees required by law or
permitted by the Indenture.  The Company need not exchange or register the
transfer of any Note or portion of a Note selected for redemption, except for
the unredeemed portion of any Note being redeemed in part.  Also, the Company
need not exchange or register the transfer of any Notes for a period of 15 days
before a selection of Notes to be redeemed or during the period between a record
date and the corresponding Interest Payment Date.

      10.  Persons Deemed Owners.  The registered Holder of a Note may be
treated as its owner for all purposes.

      11.  Amendment, Supplement And Waiver.  Subject to certain exceptions, the
Indenture , the Subsidiary Guarantees or the Notes may be amended or
supplemented with the consent of the Holders of at least a majority in principal
amount of the then outstanding Notes and Additional Notes, if any, voting

                                     A1-5
<PAGE>
 
as a single class, and any existing default or compliance with any provision of
the Indenture, the Subsidiary Guarantees or the Notes may be waived with the
consent of the Holders of a majority in principal amount of the then outstanding
Notes and Additional Notes, if any, voting as a single class. Without the
consent of any Holder of a Note, the Indenture , the Subsidiary Guarantees or
the Notes may be amended or supplemented to cure any ambiguity, defect or
inconsistency, to provide for uncertificated Notes in addition to or in place of
certificated Notes, to provide for the assumption of the Company's [or
Guarantor's] obligations to Holders of the Notes in case of a merger or
consolidation, to make any change that would provide any additional rights or
benefits to the Holders of the Notes or that does not adversely affect the legal
rights under the Indenture of any such Holder, to comply with the requirements
of the SEC in order to effect or maintain the qualification of the Indenture
under the Trust Indenture Act, to provide for the Issuance of Additional Notes
in accordance with the limitations set forth in the Indenture, or to allow any
Subsidiary Guarantor to execute a supplemental indenture to the Indenture and/or
a Subsidiary Guarantee with respect to the Notes.

      12.  Defalts And Remedies.  Events of Default include: (i) default for 30
days in the payment when due of interest on, or Liquidated Damages with respect
to, the Notes (whether or not permitted by the subordination provisions of the
Indenture); (ii) default in payment when due of the principal of or premium, if
any, on the Notes (whether or not permitted by the subordination provisions of
the Indenture); (iii) failure by the Company or any of its Restricted
Subsidiaries to comply with Section 4.15 of the Indenture; (iv) failure by the
Company or any of its Restricted Subsidiaries for 60 days after notice by the
Trustee or by the Holders of at least 25% in principal amount of Notes then
outstanding to comply with any of its other agreements in the Indenture or the
Notes; (v) default under any mortgage, indenture or instrument under which there
may be issued or by which there may be secured or evidenced any Indebtedness for
money borrowed by the Company or any of its Restricted Subsidiaries (or the
payment of which is guaranteed by the Company or any of its Restricted
Subsidiaries) whether such Indebtedness or guarantee now exists, or is created
after the date of the Indenture, which default (a) is caused by a failure to pay
principal of or premium, if any, or interest on such Indebtedness prior to the
expiration of the grace period provided in such Indebtedness on the date of such
default (a "Payment Default") or (b) results in the acceleration of such
Indebtedness prior to its stated maturity and, in each case, the principal
amount of any such Indebtedness, together with the principal amount of any other
such Indebtedness under which there has been a Payment Default or the maturity
of which has been so accelerated (after giving effect to any applicable grace
period), aggregates $10.0 million or more; (vi) failure by the Company or any of
its Restricted Subsidiaries to pay final judgments aggregating in excess of
$10.0 million (net of any amount with respect to which a reputable insurance
company with assets over $100.0 million has acknowledged liability in writing),
which judgments are not paid, discharged or stayed for a period of 60 days after
their entry; (vii) certain events of bankruptcy or insolvency with respect to
the Company or any of its Subsidiaries and (viii) except as permitted by the
Indenture, any Subsidiary Guarantee shall be held in any judicial proceeding to
be unenforceable or invalid or shall cease for any reason to be in full force
and effect or any Subsidiary Guarantor, or any Person acting on behalf of any
Subsidiary Guarantor, shall deny or disaffirm its obligations under its
Subsidiary Guarantee.  If any Event of Default occurs and is continuing, the
Trustee or the Holders of at least 25% in principal amount of the then
outstanding Notes may declare all the Notes to be due and payable.
Notwithstanding the foregoing, in the case of an Event of Default arising from
certain events of bankruptcy or insolvency, all outstanding Notes will become
due and payable without further action or notice.  Holders may not enforce the
Indenture or the Notes except as provided

                                     A1-6
<PAGE>
 
in the Indenture. Subject to certain limitations, Holders of a majority in
principal amount of the then outstanding Notes may direct the Trustee in its
exercise of any trust or power. The Trustee may withhold from Holders of the
Notes notice of any continuing Default or Event of Default (except a Default or
Event of Default relating to the payment of principal or interest) if it
determines that withholding notice is in their interest. The Holders of a
majority in aggregate principal amount of the Notes then outstanding by notice
to the Trustee may on behalf of the Holders of all of the Notes waive any
existing Default or Event of Default and its consequences under the Indenture
except a continuing Default or Event of Default in the payment of interest on,
or the principal of, the Notes. The Company is required to deliver to the
Trustee annually a statement regarding compliance with the Indenture, and the
Company is required upon becoming aware of any Default or Event of Default, to
deliver to the Trustee a statement specifying such Default or Event of Default.

      13. Trustee Dealings With Company. The Trustee, in its individual or any
other capacity, may make loans to, accept deposits from, and perform services
for the Company or its Affiliates, and may otherwise deal with the Company or
its Affiliates, as if it were not the Trustee.

      14.  No Recourse Against Others.  A director, officer, employee,
incorporator or stockholder, of the Company or any of the Subsidiary Guarantors,
as such, shall not have any liability for any obligations of the Company or such
Subsidiary Guarantor under the Notes, the Subsidiary Guarantees or the Indenture
or for any claim based on, in respect of, or by reason of, such obligations or
their creation.  Each Holder by accepting a Note waives and releases all such
liability.  The waiver and release are part of the consideration for the
issuance of the Notes.

      15.  Authentication.  This Note shall not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent.

      16.  Abbreviations.  Customary abbreviations may be used in the name of a
Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (=
tenants by the entireties), JT TEN (= joint tenants with right of survivorship
and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts
to Minors Act).

      17.  Additional Rights Of Holders Of Restricted Global Notes And
Restricted Definitive Notes.  In addition to the rights provided to Holders of
Notes under the Indenture, Holders of Restricted Global Notes and Restricted
Definitive Notes shall have all the rights set forth in the A/B Exchange
Registration Rights Agreement dated as of August 19, 1998, among the Company and
the parties named on the signature pages thereof or, in the case of Additional
Notes, Holders of Restricted Global Notes and Restricted Definitive Notes shall
have the rights set forth in one or more registration rights agreements, if any,
between the Company and the other parties thereto, relating to rights given by
the Company to the purchasers of any Additional Notes (collectively, the
"Registration Rights Agreement").

      18.  Cusip Numbers.  Pursuant to a recommendation promulgated by the
Committee on Uniform Security Identification Procedures, the Company has caused
CUSIP numbers to be printed on the Notes and the Trustee may use CUSIP numbers
in notices of redemption as a convenience to Holders.  No representation is made
as to the accuracy of such numbers either as printed on the Notes or as

                                     A1-7
<PAGE>
 
contained in any notice of redemption and reliance may be placed only on the
other identification numbers placed thereon.

      The Company will furnish to any Holder upon written request and without
charge a copy of the Indenture and/or the Registration Rights Agreement.
Requests may be made to:

Great Lakes Dredge & Dock Corporation
2122 York Road
Oak Brook, Illinois  60521
Attention:  President

                                     A1-8
<PAGE>
 
                                ASSIGNMENT FORM

      To assign this Note, fill in the form below:

(I) or (we) assign and transfer this Note to:___________________________________

                                              (Insert assignee's legal name)

________________________________________________________________________________
                (Insert assignee's soc.  sec.  or tax I.D.  no.)


________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________
             (Print or type assignee's name, address and zip code)

and irrevocably appoint_________________________________________________________

to transfer this Note on the books of the Company.  The agent may substitute
another to act for him.

Date:_______________

                                    Your Signature:_____________________________

                                          (Sign exactly as your name appears on 
                                           the face of this Note)

Signature Guarantee*:_____________________


*  Participant in a recognized Signature Guarantee Medallion Program (or other
signature guarantor acceptable to the Trustee).

                                     A1-9
<PAGE>
 
                      OPTION OF HOLDER TO ELECT PURCHASE

      If you want to elect to have this Note purchased by the Company pursuant
to Section 4.10 or 4.15 of the Indenture, check the appropriate box below:

               [_] Section 4.10            [_] Section 4.15

      If you want to elect to have only part of the Note purchased by the
Company pursuant to Section 4.10 or Section 4.15 of the Indenture, state the
amount you elect to have purchased:

                         $_______________________

Date:______________

                              Your Signature:_______________________________

                                      (Sign exactly as your name appears on the
                                      face of this Note)

                              Tax Identification No.:________________________

Signature Guarantee*:__________________________


*  Participant in a recognized Signature Guarantee Medallion Program (or other
signature guarantor acceptable to the Trustee).

                                     A1-10
<PAGE>
 
            SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL NOTE*

      The following exchanges of a part of this Global Note for an interest in
another Global Note or for a Definitive Note, or exchanges of a part of another
Global Note or Definitive Note for an interest in this Global Note, have been
made:

<TABLE> 
<CAPTION>
                                                                      Principal Amount        Signature of
                        Amount of decrease     Amount of increase    of this Global Note    authorized officer
                               in                     in               following such              of
                         Principal Amount       Principal Amount          decrease           Trustee or Note
 Date of Exchange      of this Global Note    of this Global Note       (or increase)            Custodian
- -------------------    --------------------  ----------------------  -------------------     ------------------
<S>                    <C>                   <C>                     <C>                     <C>  
</TABLE> 




*  This schedule should be included only if the Note is issued in global form.

                                     A1-11
<PAGE>
 
                 [Face of Regulation S Temporary Global Note]
- --------------------------------------------------------------------------------

                                                           CUSIP/CINS __________

        11 1/4% [Series A] [Series B] Senior Subordinated Notes due 2008

No.  ___                                                             $__________

                     GREAT LAKES DREDGE & DOCK CORPORATION

promises to pay to______________________________________________________________

or registered assigns,

the principal sum oF____________________________________________________________

Dollars on August 19, 2008.

Interest Payment Dates:  February 15, and August 15

Record Dates:  February 1, and August 1

Dated: August ___, 1998

                                 Great Lakes Dredge & Dock Corporation

                                 By: ____________________________________
                                     Name:
                                     Title:

This is one of the Notes referred to
in the within-mentioned Indenture:

THE BANK OF NEW YORK,
 as Trustee

By: __________________________________
      Authorized Signatory


- --------------------------------------------------------------------------------

                                     A2-1
<PAGE>
 
                 [Back of Regulation S Temporary Global Note]

       11 1/4% [Series A] [Series B] Senior Subordinated Notes due 2008

THE RIGHTS ATTACHING TO THIS REGULATION S TEMPORARY GLOBAL NOTE, AND THE
CONDITIONS AND PROCEDURES GOVERNING ITS EXCHANGE FOR CERTIFICATED NOTES, ARE AS
SPECIFIED IN THE INDENTURE (AS DEFINED HEREIN).  NEITHER THE HOLDER NOR THE
BENEFICIAL OWNERS OF THIS REGULATION S TEMPORARY GLOBAL NOTE SHALL BE ENTITLED
TO RECEIVE PAYMENT OF INTEREST HEREON.

UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN DEFINITIVE
FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A
NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR
ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A
SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.  UNLESS THIS
CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST
COMPANY (55 WATER STREET, NEW YORK, NEW YORK) ("DTC"), TO THE COMPANY OR ITS
AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE
ISSUED IS REGISTERED IN THE NAME OF CEDE & CO.  OR SUCH OTHER NAME AS MAY BE
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO
CEDE & CO.  OR SUCH OTHER ENTITY AS MAY BE REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

THE SECURITY (OR ITS PREDECESSOR) EVIDENCED HEREBY WAS ORIGINALLY ISSUED IN A
TRANSACTION EXEMPT FROM REGISTRATION UNDER SECTION 5 OF THE UNITED STATES
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND THE SECURITY
EVIDENCED HEREBY MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE
ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM.  EACH
PURCHASER OF THE SECURITY EVIDENCED HEREBY IS HEREBY NOTIFIED THAT THE SELLER
MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE
SECURITIES ACT PROVIDED BY RULE 144A OR REGULATION S THEREUNDER.  THE HOLDER OF
THE SECURITY EVIDENCED HEREBY AGREES FOR THE BENEFIT OF THE COMPANY THAT (A)
SUCH SECURITY MAY BE RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (1)(a) IN
THE UNITED STATES TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED
INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A
TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (b) IN A TRANSACTION MEETING
THE REQUIREMENTS OF RULE 144 UNDER THE SECURITIES ACT, (c) OUTSIDE THE UNITED
STATES TO A NON U.S. PERSON IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE
904 UNDER THE SECURITIES ACT, (d) TO AN INSTITUTIONAL "ACCREDITED INVESTOR" AS
DEFINED IN RULE 501(A)(1), (2), (3) OR (7) OF THE SECURITIES ACT (AN
"INSTITUTIONAL ACCREDITED INVESTOR") THAT, PRIOR TO SUCH

                                     A2-2
<PAGE>
 
TRANSFER, FURNISHES THE TRUSTEE A SIGNED LETTER CONTAINING CERTAIN
REPRESENTATIONS AND AGREEMENTS (THE FORM OF WHICH CAN BE OBTAINED FROM THE
TRUSTEE) AND, IF SUCH TRANSFER IS IN RESPECT OF AN AGGREGATE PRINCIPAL AMOUNT OF
SECURITIES LESS THAN $250,000, AN OPINION OF COUNSEL THAT SUCH TRANSFER IS IN
COMPLIANCE WITH THE SECURITIES ACT OR (e) IN ACCORDANCE WITH ANOTHER EXEMPTION
FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT (AND BASED UPON AN
OPINION OF COUNSEL IF THE COMPANY SO REQUESTS), (2) TO THE COMPANY OR (3)
PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT AND, IN EACH CASE, IN ACCORDANCE
WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES OR ANY
OTHER APPLICABLE JURISDICTION AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT
HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER FROM IT OF THE SECURITY EVIDENCED
HEREBY OF THE RESALE RESTRICTIONS SET FORTH IN (A) ABOVE.

      Capitalized terms used herein shall have the meanings assigned to them in
the Indenture referred to below unless otherwise indicated.

      1.  Interest.  Great Lakes Dredge & Dock Corporation, a Delaware
corporation (the "Company"), promises to pay interest on the principal amount of
this Note at 11 1/4% per annum from August 19, 1998 until maturity and shall pay
the Liquidated Damages payable pursuant to Section 5 of the Registration Rights
Agreement referred to below.  The Company will pay interest and Liquidated
Damages semi-annually on February 15 and August 15 of each year, or if any such
day is not a Business Day, on the next succeeding Business Day (each an
"Interest Payment Date").  Interest on the Notes will accrue from the most
recent date to which interest has been paid or, if no interest has been paid,
from the date of issuance; provided that if there is no existing Default in the
payment of interest, and if this Note is authenticated between a record date
referred to on the face hereof and the next succeeding Interest Payment Date,
interest shall accrue from such next succeeding Interest Payment Date; provided,
further, that the first Interest Payment Date shall be February 15, 1999.  The
Company shall pay interest (including post-petition interest in any proceeding
under any Bankruptcy Law) on overdue principal and premium, if any, from time to
time on demand at a rate that is 1% per annum in excess of the rate then in
effect; it shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue installments of interest and
Liquidated Damages (without regard to any applicable grace periods) from time to
time on demand at the same rate to the extent lawful.  Interest will be computed
on the basis of a 360-day year of twelve 30-day months.

      Until this Regulation S Temporary Global Note is exchanged for one or more
Regulation S Permanent Global Notes, the Holder hereof shall not be entitled to
receive payments of interest hereon; until so exchanged in full, this Regulation
S Temporary Global Note shall in all other respects be entitled to the same
benefits as other Senior Subordinated Notes under the Indenture.

      2.  Method of Payment.  The Company will pay interest on the Notes 
(except defaulted interest) and Liquidated Damages to the Persons who are
registered Holders of Notes at the close of business on the August 1 or February
1 next preceding the Interest Payment Date, even if such Notes are canceled
after such record date and on or before such Interest Payment Date, except as
provided in Section 2.12 of the Indenture with respect to defaulted interest.
The Notes will be payable as to 

                                     A2-3
<PAGE>
 
principal, premium, interest and Liquidated Damages at the office or agency of
the Company maintained for such purpose within or without the City and State of
New York, or, at the option of the Company, payment of interest and Liquidated
Damages may be made by check mailed to the Holders at their addresses set forth
in the register of Holders, and provided that payment by wire transfer of
[immediately available/next day] funds will be required with respect to
principal of and interest, premium and Liquidated Damages on, all Global Notes
and all other Notes the Holders of which shall have provided wire transfer
instructions to the Company or the Paying Agent. Such payment shall be in such
coin or currency of the United States of America as at the time of payment is
legal tender for payment of public and private debts.

      3.  Paying Agent and Registrar.  Initially, The Bank of New York, the 
Trustee under the Indenture, will act as Paying Agent and Registrar. The Company
may change any Paying Agent or Registrar without notice to any Holder. The
Company or any of its Subsidiaries may act in any such capacity.

      4.  Indenture.  The Company issued the Notes under an Indenture dated as 
of August 19, 1998 ("Indenture") between the Company and the Trustee. The terms
of the Notes include those stated in the Indenture and those made part of the
Indenture by reference to the Trust Indenture Act of 1939, as amended (15 U.S.
Code (S)(S) 77aaa-77bbbb). The Notes are subject to all such terms, and Holders
are referred to the Indenture and such Act for a statement of such terms. To the
extent this Note conflicts with the express provisions of the Indenture, the
provisions of the Indenture shall govern and be controlling. The Notes are
obligations of the Company limited to $115.0 million in aggregate principal
amount.

      5.  Optional Redemption.

      (a) Except as set forth in clause (b) of this Paragraph 5, the Company
shall not have the option to redeem the Notes pursuant to this Paragraph 5 prior
to August 15, 2003.  Thereafter, the Company shall have the option to redeem the
Notes, in whole or in part, upon not less than 30 nor more than 60 days' notice,
in cash at the redemption prices (expressed as percentages of principal amount)
set forth below plus accrued and unpaid interest and Liquidated Damages thereon,
if any, to the applicable redemption date, if redeemed during the twelve-month
period beginning on August 15 of the years indicated below:

<TABLE>
<CAPTION>
Year                                                                                Percentage
- ----                                                                                ----------
<S>                                                                                 <C>
2003...........................................................................       105.625%
2004...........................................................................       103.750%
2005...........................................................................       101.875%
2006 and thereafter............................................................       100.000%
</TABLE>

      (b) Notwithstanding the provisions of subparagraph (a) of this Paragraph
5, at any time prior to August 15, 2001, the Company may (but will not have the
obligation to) on any one or more occasions redeem up to 35% of the aggregate
principal amount of Notes originally issued at a redemption price equal to
111.250% of the principal amount thereof, plus accrued and unpaid interest and
Liquidated 

                                     A2-4
<PAGE>
 
Damages, if any, thereon to the redemption date, with the net cash proceeds of
one or more Public Equity Offerings; provided that at least 65% of the aggregate
principal amount of Notes originally issued remain outstanding immediately after
the occurrence of such redemption (excluding Notes held by the Company and its
Subsidiaries); and provided, further, that such redemption shall occur within
180 days of the date of the closing of such Public Equity Offering.

      6.  Mandatory Redemption.

      Except as set forth in paragraph 7 below, the Company shall not be
required to make mandatory redemption payments with respect to the Notes.

      7.  Repurchase at Option of Holder.

      (a) If there is a Change of Control, the Company shall be required to make
an offer (a "Change of Control Offer") to repurchase all or any part (equal to
$1,000 or an integral multiple thereof) of each Holder's Notes at a purchase
price equal to 101% of the aggregate principal amount thereof plus accrued and
unpaid interest, if any, to the date of purchase (the "Change of Control
Payment").  Within 30 days following any Change of Control, the Company shall
mail a notice to each Holder setting forth the procedures governing the Change
of Control Offer as required by the Indenture.

      (b) If the Company or a Subsidiary consummates any Asset Sales, within
five days of each date on which the aggregate amount of Excess Proceeds exceeds
$10.0 million, the Company shall commence an offer to all Holders of Notes (as
"Asset Sale Offer") pursuant to Section 3.09 of the Indenture to purchase the
maximum principal amount of Notes that may be purchased out of the Excess
Proceeds at an offer price in cash in an amount equal to 100% of the principal
amount thereof plus accrued and unpaid interest, if any, to the date fixed for
the closing of such offer, in accordance with the procedures set forth in the
Indenture.  To the extent that the aggregate amount of Notes tendered pursuant
to an Asset Sale Offer is less than the Excess Proceeds, the Company (or such
Subsidiary) may use such deficiency for general corporate purposes.  If the
aggregate principal amount of Notes surrendered by Holders thereof exceeds the
amount of Excess Proceeds, the Trustee shall select the Notes to be purchased on
a pro rata basis.  Holders of Notes that are the subject of an offer to purchase
will receive an Asset Sale Offer from the Company prior to any related purchase
date and may elect to have such Notes purchased by completing the form entitled
"Option of Holder to Elect Purchase" on the reverse of the Notes.

      8.  Notice of Redemption.  Notice of redemption will be mailed at least 30
days but not more than 60 days before the redemption date to each Holder whose
Notes are to be redeemed at its registered address.  Notes in denominations
larger than $1,000 may be redeemed in part but only in whole multiples of
$1,000, unless all of the Notes held by a Holder are to be redeemed.  On and
after the redemption date interest ceases to accrue on Notes or portions thereof
called for redemption.

      9.  Denominations, Transfer, Exchange.  The Notes are in registered form
without coupons in denominations of $1,000 and integral multiples of $1,000.
The transfer of Notes may be registered and Notes may be exchanged as provided
in the Indenture.  The Registrar and the Trustee may require a Holder, among
other things, to furnish appropriate endorsements and transfer documents and 

                                     A2-5
<PAGE>
 
the Company may require a Holder to pay any taxes and fees required by law or
permitted by the Indenture. The Company need not exchange or register the
transfer of any Note or portion of a Note selected for redemption, except for
the unredeemed portion of any Note being redeemed in part. Also, it need not
exchange or register the transfer of any Notes for a period of 15 days before a
selection of Notes to be redeemed or during the period between a record date and
the corresponding Interest Payment Date.

      This Regulation S Temporary Global Note is exchangeable in whole or in
part for one or more Global Notes only (i) on or after the termination of the
40-day restricted period (as defined in Regulation S) and (ii) upon presentation
of certificates (accompanied by an Opinion of Counsel, if applicable) required
by Article 2 of the Indenture.  Upon exchange of this Regulation S Temporary
Global Note for one or more Global Notes, the Trustee shall cancel this
Regulation S Temporary Global Note.

      10.  Persons Deemed Owners.  The registered Holder of a Note may be
treated as its owner for all purposes.

      11.  Amendment, Supplement and Waiver.  Subject to certain exceptions, the
Indenture or the Notes may be amended or supplemented with the consent of the
Holders of at least a majority in principal amount of the then outstanding Notes
and Additional Notes, if any, and any existing default or compliance with any
provision of the Indenture, the Subsidiary Guarantees or the Notes may be waived
with the consent of the Holders of a majority in principal amount of the then
outstanding Notes.  Without the consent of any Holder of a Note, the Indenture
or the Notes may be amended or supplemented to cure any ambiguity, defect or
inconsistency, to provide for uncertificated Notes in addition to or in place of
certificated Notes, to provide for the assumption of the Company's obligations
to Holders of the Notes in case of a merger or consolidation, to make any change
that would provide any additional rights or benefits to the Holders of the Notes
or that does not adversely affect the legal rights under the Indenture of any
such Holder, or to comply with the requirements of the SEC in order to effect or
maintain the qualification of the Indenture under the Trust Indenture Act to
provide for the Issuance of Additional Notes in accordance with the limitations
set forth in the Indenture, or to allow any Subsidiary Guarantor to execute a
supplemental indenture to the Indenture and/or a Subsidiary Guarantee with
respect to the Notes.

      12.  Defaults and Remedies.  Events of Default include: (i) default for 30
days in the payment when due of interest on, or Liquidated Damages with respect
to, the Notes (whether or not permitted by the subordination provisions of the
Indenture); (ii) default in payment when due of the principal of or premium, if
any, on the Notes (whether or not permitted by the subordination provisions of
the Indenture); (iii) failure by the Company or any of its Restricted
Subsidiaries to comply with Section 4.15 of the Indenture; (iv) failure by the
Company or any of its Restricted Subsidiaries for 60 days after notice by the
Trustee or by the Holders of at least 25% in principal amount of Notes then
outstanding to comply with any of its other agreements in the Indenture or the
Notes; (v) default under any mortgage, indenture or instrument under which there
may be issued or by which there may be secured or evidenced any Indebtedness for
money borrowed by the Company or any of its Restricted Subsidiaries (or the
payment of which is guaranteed by the Company or any of its Restricted
Subsidiaries) whether such Indebtedness or guarantee now exists, or is created
after the date of the Indenture, which default (a) is caused by a failure to pay
principal of or premium, if any, or interest on 

                                     A2-6
<PAGE>
 
such Indebtedness prior to the expiration of the grace period provided in such
Indebtedness on the date of such default (a "Payment Default") or (b) results in
the acceleration of such Indebtedness prior to its stated maturity and, in each
case, the principal amount of any such Indebtedness, together with the principal
amount of any other such Indebtedness under which there has been a Payment
Default or the maturity of which has been so accelerated (after giving effect to
any applicable grace period), aggregates $10.0 million or more; (vi) failure by
the Company or any of its Restricted Subsidiaries to pay final judgments
aggregating in excess of $10.0 million (net of any amount with respect to which
a reputable insurance company with assets over $100.0 million has acknowledged
liability in writing), which judgments are not paid, discharged or stayed for a
period of 60 days after their entry; (vii) certain events of bankruptcy or
insolvency with respect to the Company or any of its Subsidiaries and (viii)
except as permitted by the Indenture, any Subsidiary Guarantee shall be held in
any judicial proceeding to be unenforceable or invalid or shall cease for any
reason to be in full force and effect or any Subsidiary Guarantor, or any Person
acting on behalf of any Subsidiary Guarantor, shall deny or disaffirm its
obligations under its Subsidiary Guarantee. If any Event of Default occurs and
is continuing, the Trustee or the Holders of at least 25% in principal amount of
the then outstanding Notes may declare all the Notes to be due and payable.
Notwithstanding the foregoing, in the case of an Event of Default arising from
certain events of bankruptcy or insolvency, all outstanding Notes will become
due and payable without further action or notice. Holders may not enforce the
Indenture or the Notes except as provided in the Indenture. Subject to certain
limitations, Holders of a majority in principal amount of the then outstanding
Notes may direct the Trustee in its exercise of any trust or power. The Trustee
may withhold from Holders of the Notes notice of any continuing Default or Event
of Default (except a Default or Event of Default relating to the payment of
principal or interest) if it determines that withholding notice is in their
interest. The Holders of a majority in aggregate principal amount of the Notes
then outstanding by notice to the Trustee may on behalf of the Holders of all of
the Notes waive any existing Default or Event of Default and its consequences
under the Indenture except a continuing Default or Event of Default in the
payment of interest on, or the principal of, the Notes. The Company is required
to deliver to the Trustee annually a statement regarding compliance with the
Indenture, and the Company is required upon becoming aware of any Default or
Event of Default, to deliver to the Trustee a statement specifying such Default
or Event of Default.

      13.  Trustee Dealings with Company.  The Trustee, in its individual or any
other capacity, may make loans to, accept deposits from, and perform services
for the Company or its Affiliates, and may otherwise deal with the Company or
its Affiliates, as if it were not the Trustee.

      14.  No Recourse Against Others.  A director, officer, employee,
incorporator or stockholder, of the Company or any of the Subsidiary Guarantors,
as such, shall not have any liability for any obligations of the Company or such
Subsidiary Guarantor under the Notes, the Subsidiary Guarantees or the Indenture
or for any claim based on, in respect of, or by reason of, such obligations or
their creation.  Each Holder by accepting a Note waives and releases all such
liability.  The waiver and release are part of the consideration for the
issuance of the Notes.

      15.  Authentication.  This Note shall not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent.

                                     A2-7
<PAGE>
 
      16.  Abbreviations.  Customary abbreviations may be used in the name of a
Holder or an assignee, such as:  TEN COM (= tenants in common), TEN ENT (=
tenants by the entireties), JT TEN (= joint tenants with right of survivorship
and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts
to Minors Act).

      17.  Additional Rights of Holders of Restricted Global Notes and
Restricted Definitive Notes. In addition to the rights provided to Holders of
Notes under the Indenture, Holders of Restricted Global Notes and Restricted
Definitive Notes shall have all the rights set forth in the A/B Exchange
Registration Rights Agreement dated as of August 19, 1998, among the Company and
the parties named on the signature pages thereof or, in the case of Additional
Notes, Holders of Restricted Global Notes and Restricted Definitive Notes shall
have the rights set forth in one or more registration rights agreements, if any,
between the Company and the other parties thereto, relating to rights given by
the Company to the purchasers of any Additional Notes (collectively, the
"Registration Rights Agreement").

      18.  CUSIP Numbers.  Pursuant to a recommendation promulgated by the
Committee on Uniform Security Identification Procedures, the Company has caused
CUSIP numbers to be printed on the Notes and the Trustee may use CUSIP numbers
in notices of redemption as a convenience to Holders.  No representation is made
as to the accuracy of such numbers either as printed on the Notes or as
contained in any notice of redemption and reliance may be placed only on the
other identification numbers placed thereon.

      The Company will furnish to any Holder upon written request and without
charge a copy of the Indenture and/or the Registration Rights Agreement.
Requests may be made to:

Great Lakes Dredge & Dock Corporation
2122 York Road
Oak Brook, Illinois  60521
Attention:  President

                                     A2-8
<PAGE>
 
                                Assignment Form

      To assign this Note, fill in the form below:

(I) or (we) assign and transfer this Note to:___________________________________

                                              (Insert assignee's legal name)

________________________________________________________________________________

                (Insert assignee's soc. sec. or tax I.D. no.)

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

             (Print or type assignee's name, address and zip code)

and irrevocably appoint_________________________________________________________

to transfer this Note on the books of the Company.  The agent may substitute
another to act for him.

Date:_______________

                              Your Signature:___________________________________

                    (Sign exactly as your name appears on the face of this Note)

Signature Guarantee*:_____________________________________


*  Participant in a recognized Signature Guarantee Medallion Program (or other
signature guarantor acceptable to the Trustee).

                                     A2-9
<PAGE>
 
                      Option of Holder to Elect Purchase

      If you want to elect to have this Note purchased by the Company pursuant
to Section 4.10 or 4.15 of the Indenture, check the appropriate box below:

              [_] Section 4.10      [_] Section 4.15

      If you want to elect to have only part of the Note purchased by the
Company pursuant to Section 4.10 or Section 4.15 of the Indenture, state the
amount you elect to have purchased:

                         $______________________

Date:____________________

                              Your Signature:______________________________

                    (Sign exactly as your name appears on the face of this Note)

                              Tax Identification No.:______________________

Signature Guarantee*:______________________________


*  Participant in a recognized Signature Guarantee Medallion Program (or other
signature guarantor acceptable to the Trustee).

                                     A2-10
<PAGE>
 
          SCHEDULE OF EXCHANGES OF REGULATION S TEMPORARY GLOBAL NOTE

      The following exchanges of a part of this Regulation S Temporary Global
Note for an interest in another Global Note, or of other Restricted Global Notes
for an interest in this Regulation S Temporary Global Note, have been made:


<TABLE>
<CAPTION>
                                                                                          
                                                                    Principal Amount         Signature of     
                    Amount of decrease in  Amount of increase in   of this Global Note   authorized officer of             
                     Principal Amount of     Principal Amount    following such decrease   Trustee or Note
Date of Exchange       this Global Note    of this Global Note       (or increase)            Custodian
- ----------------    ---------------------  --------------------  ----------------------  -------------------
<S>                 <C>                    <C>                   <C>                     <C> 
</TABLE>

                                     A2-11
<PAGE>
 
                                                                       EXHIBIT B

                        FORM OF CERTIFICATE OF TRANSFER

Great Lakes Dredge & Dock Corporation
2122 York Road
Oak Brook, Illinois  60521

The Bank of New York
101 Barclay Street, Floor 21 West
New York, New York  10286

      Re: 11 1/4% Senior Subordinated Notes due 2008
          ------------------------------------------

      Reference is hereby made to the Indenture, dated as of August 19, 1998
(the "Indenture"), between Great Lakes Dredge & Dock Corporation, as issuer (the
"Company"), and The Bank of New York, as trustee.  Capitalized terms used but
not defined herein shall have the meanings given to them in the Indenture.

      ___________________, (the "Transferor") owns and proposes to transfer the
Note[s] or interest in such Note[s] specified in Annex A hereto, in the
principal amount of $___________ in such Note[s] or interests (the "Transfer"),
to ___________________________ (the "Transferee"), as further specified in
Annex A hereto.  In connection with the Transfer, the Transferor hereby
certifies that:

                            [CHECK ALL THAT APPLY]

      1. [_] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL INTEREST IN
             ------------------------------------------------------------------
THE 144A GLOBAL NOTE OR A DEFINITIVE NOTE PURSUANT TO RULE 144A.  The Transfer
- ---------------------------------------------------------------               
is being effected pursuant to and in accordance with Rule 144A under the United
States Securities Act of 1933, as amended (the "Securities Act"), and,
accordingly, the Transferor hereby further certifies that the beneficial
interest or Definitive Note is being transferred to a Person that the Transferor
reasonably believed and believes is purchasing the beneficial interest or
Definitive Note for its own account, or for one or more accounts with respect to
which such Person exercises sole investment discretion, and such Person and each
such account is a "qualified institutional buyer" within the meaning of Rule
144A in a transaction meeting the requirements of Rule 144A and such Transfer is
in compliance with any applicable blue sky securities laws of any state of the
United States.  Upon consummation of the proposed Transfer in accordance with
the terms of the Indenture, the transferred beneficial interest or Definitive
Note will be subject to the restrictions on transfer enumerated in the Private
Placement Legend printed on the 144A Global Note and/or the Definitive Note and
in the Indenture and the Securities Act.

      2. [_] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL INTEREST IN
             ------------------------------------------------------------------
THE TEMPORARY REGULATION S GLOBAL NOTE, THE REGULATION S GLOBAL NOTE OR A
- -------------------------------------------------------------------------
DEFINITIVE NOTE PURSUANT TO REGULATION S.  The Transfer is being effected
- ----------------------------------------                                 
pursuant to and in accordance with Rule 903 or Rule 904 under the Securities Act
and, accordingly, the Transferor hereby further certifies that (i) the Transfer
is not being made to a person in the United States and (x) at the time the buy
order was originated, the Transferee was outside the United States or such
Transferor and any Person acting on its behalf reasonably believed and believes
that the Transferee was outside the United States or (y) the transaction 

                                      B-1
<PAGE>
 
was executed in, on or through the facilities of a designated offshore
securities market and neither such Transferor nor any Person acting on its
behalf knows that the transaction was prearranged with a buyer in the United
States, (ii) no directed selling efforts have been made in contravention of the
requirements of Rule 903(b) or Rule 904(b) of Regulation S under the Securities
Act [and/,] (iii) the transaction is not part of a plan or scheme to evade the
registration requirements of the Securities Act and (iv) if the proposed
transfer is being made prior to the expiration of the Restricted Period, the
transfer is not being made to a U.S. Person or for the account or benefit of a
U.S. Person (other than an Initial Purchaser). Upon consummation of the proposed
transfer in accordance with the terms of the Indenture, the transferred
beneficial interest or Definitive Note will be subject to the restrictions on
Transfer enumerated in the Private Placement Legend printed on the Regulation S
Global Note , the Temporary Regulation S Global Note and/or the Definitive Note
and in the Indenture and the Securities Act.

      3. [_] CHECK AND COMPLETE IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL
             -------------------------------------------------------------------
INTEREST IN THE IAI GLOBAL NOTE OR A DEFINITIVE NOTE PURSUANT TO ANY PROVISION
- ------------------------------------------------------------------------------
OF THE SECURITIES ACT OTHER THAN RULE 144A OR REGULATION S.  The Transfer is
- ----------------------------------------------------------                  
being effected in compliance with the transfer restrictions applicable to
beneficial interests in Restricted Global Notes and Restricted Definitive Notes
and pursuant to and in accordance with the Securities Act and any applicable
blue sky securities laws of any state of the United States, and accordingly the
Transferor hereby further certifies that (check one):

         (a) [_] such Transfer is being effected pursuant to and in accordance
   with Rule 144 under the Securities Act;

                                      or

         (b) [_] such Transfer is being effected to the Company or a subsidiary
   thereof;

                                      or

         (c) [_] such Transfer is being effected pursuant to an effective
   registration statement under the Securities Act and in compliance with the
   prospectus delivery requirements of the Securities Act;

                                      or

         (d) [_] such Transfer is being effected to an Institutional Accredited
   Investor and pursuant to an exemption from the registration requirements of
   the Securities Act other than Rule 144A, Rule 144 or Rule 904, and the
   Transferor hereby further certifies that it has not engaged in any general
   solicitation within the meaning of Regulation D under the Securities Act and
   the Transfer complies with the transfer restrictions applicable to beneficial
   interests in a Restricted Global Note or Restricted Definitive Notes and the
   requirements of the exemption claimed, which certification is supported by
   (1) a certificate executed by the Transferee in the form of Exhibit D to the
   Indenture and (2) if such Transfer is in respect of a principal amount of
   Notes at the time of transfer of less than $250,000, an Opinion of Counsel
   provided by the Transferor or the Transferee (a copy of which the Transferor
   has attached to this certification), to the effect that such Transfer is in
   compliance with the Securities Act.  Upon consummation of the proposed
   transfer in accordance with the terms of the Indenture, the transferred
   beneficial interest or Definitive Note will be subject 

                                      B-2
<PAGE>
 
   to the restrictions on transfer enumerated in the Private Placement Legend
   printed on the IAI Global Note and/or the Definitive Notes and in the
   Indenture and the Securities Act.

      4. [_] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL INTEREST IN
             ------------------------------------------------------------------
AN UNRESTRICTED GLOBAL NOTE OR OF AN UNRESTRICTED DEFINITIVE NOTE.
- ----------------------------------------------------------------- 

      (a) [_] CHECK IF TRANSFER IS PURSUANT TO RULE 144.  (i) The Transfer is
being effected pursuant to and in accordance with Rule 144 under the Securities
Act and in compliance with the transfer restrictions contained in the Indenture
and any applicable blue sky securities laws of any state of the United States
and (ii) the restrictions on transfer contained in the Indenture and the Private
Placement Legend are not required in order to maintain compliance with the
Securities Act.  Upon consummation of the proposed Transfer in accordance with
the terms of the Indenture, the transferred beneficial interest or Definitive
Note will no longer be subject to the restrictions on transfer enumerated in the
Private Placement Legend printed on the Restricted Global Notes, on Restricted
Definitive Notes and in the Indenture.

      (b) [_] CHECK IF TRANSFER IS PURSUANT TO REGULATION S.  (i) The Transfer
is being effected pursuant to and in accordance with Rule 903 or Rule 904 under
the Securities Act and in compliance with the transfer restrictions contained in
the Indenture and any applicable blue sky securities laws of any state of the
United States and (ii) the restrictions on transfer contained in the Indenture
and the Private Placement Legend are not required in order to maintain
compliance with the Securities Act.  Upon consummation of the proposed Transfer
in accordance with the terms of the Indenture, the transferred beneficial
interest or Definitive Note will no longer be subject to the restrictions on
transfer enumerated in the Private Placement Legend printed on the Restricted
Global Notes, on Restricted Definitive Notes and in the Indenture.

      (c) [_] CHECK IF TRANSFER IS PURSUANT TO OTHER EXEMPTION.  (i) The
Transfer is being effected pursuant to and in compliance with an exemption from
the registration requirements of the Securities Act other than Rule 144, Rule
903 or Rule 904 and in compliance with the transfer restrictions contained in
the Indenture and any applicable blue sky securities laws of any State of the
United States and (ii) the restrictions on transfer contained in the Indenture
and the Private Placement Legend are not required in order to maintain
compliance with the Securities Act.  Upon consummation of the proposed Transfer
in accordance with the terms of the Indenture, the transferred beneficial
interest or Definitive Note will not be subject to the restrictions on transfer
enumerated in the Private Placement Legend printed on the Restricted Global
Notes or Restricted Definitive Notes and in the Indenture.

      This certificate and the statements contained herein are made for your
benefit and the benefit of the Company.

                              _____________________________________________

                                         [Insert Name of Transferor]

                              By:__________________________________________
                               Name:

                                      B-3
<PAGE>
 
                               Title:
Dated:_________________

                                      B-4
<PAGE>
 
                      ANNEX A TO CERTIFICATE OF TRANSFER


   1. The Transferor owns and proposes to transfer the following:

                           [CHECK ONE OF (a) OR (b)]

        (a) [_]   a beneficial interest in the:
            (i)   [_] 144A Global Note (CUSIP ___________), or
            (ii)  [_] Regulation S Global Note (CUSIP ________), or
            (iii) [_] IAI Global Note (CUSIP __________); or
        (b) [_]   a Restricted Definitive Note.

   2. After the Transfer the Transferee will hold:

                                  [CHECK ONE]

        (a) [_]   a beneficial interest in the:

            (i)   [_] 144A Global Note (CUSIP __________), or
            (ii)  [_] Regulation S Global Note (CUSIP ________), or
            (iii) [_] IAI Global Note (CUSIP ____________); or
            (iv)  [_] Unrestricted Global Note (CUSIP   ); or
        (b) [_]   a Restricted Definitive Note; or
        (c) [_]   an Unrestricted Definitive Note,
        in accordance with the terms of the Indenture.

                                      B-5
<PAGE>
 
                                                                       EXHIBIT C

                        FORM OF CERTIFICATE OF EXCHANGE

Great Lakes Dredge & Dock Corporation
2122 York Road
Oak Brook, Illinois  60521

The Bank of New York
101 Barclay Street, Floor 21 West
New York, New York  10286

      Re: 11 1/4% Senior Subordinated Notes due 2008
          ------------------------------------------

                              (CUSIP ____________)

      Reference is hereby made to the Indenture, dated as of August 19, 1998
(the "Indenture"), between Great Lakes Dredge & Dock Corporation, as issuer (the
"Company"), and The Bank of New York, as trustee.  Capitalized terms used but
not defined herein shall have the meanings given to them in the Indenture.

      __________________________, (the "Owner") owns and proposes to exchange
the Note[s] or interest in such Note[s] specified herein, in the principal
amount of $____________ in such Note[s] or interests (the "Exchange").  In
connection with the Exchange, the Owner hereby certifies that:

      1.  EXCHANGE OF RESTRICTED DEFINITIVE NOTES OR BENEFICIAL INTERESTS IN A
          --------------------------------------------------------------------
RESTRICTED GLOBAL NOTE FOR UNRESTRICTED DEFINITIVE NOTES OR BENEFICIAL INTERESTS
- --------------------------------------------------------------------------------
IN AN UNRESTRICTED GLOBAL NOTE
- ------------------------------

      (a) [_] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A RESTRICTED
GLOBAL NOTE TO BENEFICIAL INTEREST IN AN UNRESTRICTED GLOBAL NOTE.  In
connection with the Exchange of the Owner's beneficial interest in a Restricted
Global Note for a beneficial interest in an Unrestricted Global Note in an equal
principal amount, the Owner hereby certifies (i) the beneficial interest is
being acquired for the Owner's own account without transfer, (ii) such Exchange
has been effected in compliance with the transfer restrictions applicable to the
Global Notes and pursuant to and in accordance with the United States Securities
Act of 1933, as amended (the "Securities Act"), (iii) the restrictions on
transfer contained in the Indenture and the Private Placement Legend are not
required in order to maintain compliance with the Securities Act and (iv) the
beneficial interest in an Unrestricted Global Note is being acquired in
compliance with any applicable blue sky securities laws of any state of the
United States.

      (b) [_] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A RESTRICTED
GLOBAL NOTE TO UNRESTRICTED DEFINITIVE NOTE.  In connection with the Exchange of
the Owner's beneficial interest in a Restricted Global Note for an Unrestricted
Definitive Note, the Owner hereby certifies (i) the Definitive Note is being
acquired for the Owner's own account without transfer, (ii) such Exchange has
been effected in compliance with the transfer restrictions applicable to the
Restricted Global Notes and pursuant to and in accordance with the Securities
Act, (iii) the restrictions on transfer contained in the 

                                      C-1
<PAGE>
 
Indenture and the Private Placement Legend are not required in order to maintain
compliance with the Securities Act and (iv) the Definitive Note is being
acquired in compliance with any applicable blue sky securities laws of any state
of the United States.

      (c) [_] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE NOTE TO BENEFICIAL
INTEREST IN AN UNRESTRICTED GLOBAL NOTE.  In connection with the Owner's
Exchange of a Restricted Definitive Note for a beneficial interest in an
Unrestricted Global Note, the Owner hereby certifies (i) the beneficial interest
is being acquired for the Owner's own account without transfer, (ii) such
Exchange has been effected in compliance with the transfer restrictions
applicable to Restricted Definitive Notes and pursuant to and in accordance with
the Securities Act, (iii) the restrictions on transfer contained in the
Indenture and the Private Placement Legend are not required in order to maintain
compliance with the Securities Act and (iv) the beneficial interest is being
acquired in compliance with any applicable blue sky securities laws of any state
of the United States.

      (d) [_] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE NOTE TO
UNRESTRICTED DEFINITIVE NOTE.  In connection with the Owner's Exchange of a
Restricted Definitive Note for an Unrestricted Definitive Note, the Owner hereby
certifies (i) the Unrestricted Definitive Note is being acquired for the Owner's
own account without transfer, (ii) such Exchange has been effected in compliance
with the transfer restrictions applicable to Restricted Definitive Notes and
pursuant to and in accordance with the Securities Act, (iii) the restrictions on
transfer contained in the Indenture and the Private Placement Legend are not
required in order to maintain compliance with the Securities Act and (iv) the
Unrestricted Definitive Note is being acquired in compliance with any applicable
blue sky securities laws of any state of the United States.

      2.  EXCHANGE OF RESTRICTED DEFINITIVE NOTES OR BENEFICIAL INTERESTS IN
          ------------------------------------------------------------------
RESTRICTED GLOBAL NOTES FOR RESTRICTED DEFINITIVE NOTES OR BENEFICIAL INTERESTS
- -------------------------------------------------------------------------------
IN RESTRICTED GLOBAL NOTES
- --------------------------

      (a) [_] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A RESTRICTED
GLOBAL NOTE TO RESTRICTED DEFINITIVE NOTE.  In connection with the Exchange of
the Owner's beneficial interest in a Restricted Global Note for a Restricted
Definitive Note with an equal principal amount, the Owner hereby certifies that
the Restricted Definitive Note is being acquired for the Owner's own account
without transfer.  Upon consummation of the proposed Exchange in accordance with
the terms of the Indenture, the Restricted Definitive Note issued will continue
to be subject to the restrictions on transfer enumerated in the Private
Placement Legend printed on the Restricted Definitive Note and in the Indenture
and the Securities Act.

      (b) CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE NOTE TO BENEFICIAL
INTEREST IN A RESTRICTED GLOBAL NOTE.  In connection with the Exchange of the
Owner's Restricted Definitive Note for a beneficial interest in the [CHECK ONE]
[_] 144A Global Note, [_] Regulation S Global Note, [_] IAI Global Note with 
an equal principal amount, the Owner hereby certifies (i) the beneficial
interest is being acquired for the Owner's own account without transfer and (ii)
such Exchange has been effected in compliance with the transfer restrictions
applicable to the Restricted Global Notes and pursuant to and in accordance with
the Securities Act, and in compliance with any applicable blue sky securities
laws of any state of the United States. Upon consummation of the proposed
Exchange in accordance with the terms of the Indenture, the beneficial interest
issued will be subject to the restrictions on transfer 

                                      C-2
<PAGE>
 
enumerated in the Private Placement Legend printed on the relevant Restricted
Global Note and in the Indenture and the Securities Act.

                                      C-3
<PAGE>
                                                                       EXHIBIT C

 
      This certificate and the statements contained herein are made for your
benefit and the benefit of the Company.

 
                              _____________________________________________
                                   [Insert Name of Transferor]

                              By:__________________________________________
                               Name:
                               Title:
Dated:____________________

                                      C-4
<PAGE>
 
                                                                       EXHIBIT D

                           FORM OF CERTIFICATE FROM

                  ACQUIRING INSTITUTIONAL ACCREDITED INVESTOR

Great Lakes Dredge & Dock Corporation
2122 York Road
Oak Brook, Illinois  60521

The Bank of New York
101 Barclay Street, Floor 21 West
New York, New York  10286

          Re:  11 1/4% Senior Subordinated Notes due 2008
               ------------------------------------------

          Reference is hereby made to the Indenture, dated as of August 19, 1998
(the "Indenture"), between Great Lakes Dredge & Dock Corporation, as issuer (the
"Company"), and The Bank of New York, as trustee. Capitalized terms used but not
defined herein shall have the meanings given to them in the Indenture.

          In connection with our proposed purchase of $____________ aggregate
principal amount of:

          (a)  [_]  a beneficial interest in a Global Note, or

          (b)  [_]  a Definitive Note,

          we confirm that:

          1.   We understand that any subsequent transfer of the Notes or any
interest therein is subject to certain restrictions and conditions set forth in
the Indenture and the undersigned agrees to be bound by, and not to resell,
pledge or otherwise transfer the Notes or any interest therein except in
compliance with, such restrictions and conditions and the United States
Securities Act of 1933, as amended (the "Securities Act").

          2.   We understand that the offer and sale of the Notes have not been
registered under the Securities Act, and that the Notes and any interest therein
may not be offered or sold except as permitted in the following sentence. We
agree, on our own behalf and on behalf of any accounts for which we are acting
as hereinafter stated, that if we should sell the Notes or any interest therein,
we will do so only (A) to the Company or any subsidiary thereof, (B) in
accordance with Rule 144A under the Securities Act to a "qualified institutional
buyer" (as defined therein), (C) to an institutional "accredited investor" (as
defined below) that, prior to such transfer, furnishes (or has furnished on its
behalf by a U.S. broker-dealer) to you and to the Company a signed letter
substantially in the form of this letter and, if such transfer is in respect of
a principal amount of Notes, at the time of transfer of less than $250,000, an
Opinion of Counsel in form reasonably acceptable to the Company to the effect
that such transfer is in compliance with the Securities Act, (D) outside the
United States in accordance with Rule 904 of

                                      D-1
<PAGE>
 
                                                                       EXHIBIT D

Regulation S under the Securities Act, (E) pursuant to the provisions of Rule
144(k) under the Securities Act or (F) pursuant to an effective registration
statement under the Securities Act, and we further agree to provide to any
person purchasing the Definitive Note or beneficial interest in a Global Note
from us in a transaction meeting the requirements of clauses (A) through (E) of
this paragraph a notice advising such purchaser that resales thereof are
restricted as stated herein.

          3.   We understand that, on any proposed resale of the Notes or
beneficial interest therein, we will be required to furnish to you and the
Company such certifications, legal opinions and other information as you and the
Company may reasonably require to confirm that the proposed sale complies with
the foregoing restrictions. We further understand that the Notes purchased by us
will bear a legend to the foregoing effect.

          4.   We are an institutional "accredited investor" (as defined in Rule
501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act) and have
such knowledge and experience in financial and business matters as to be capable
of evaluating the merits and risks of our investment in the Notes, and we and
any accounts for which we are acting are each able to bear the economic risk of
our or its investment.

          5.   We are acquiring the Notes or beneficial interest therein
purchased by us for our own account or for one or more accounts (each of which
is an institutional "accredited investor") as to each of which we exercise sole
investment discretion.

          You and the Company are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceedings or official inquiry with
respect to the matters covered hereby.

 
                                        ________________________________________
                                          [Insert Name of Accredited Investor]

                                        By:_____________________________________
                                         Name:
                                         Title:

Dated:____________________

                                      D-2
<PAGE>
 
                                                                       EXHIBIT E

                        [FORM OF NOTATION OF GUARANTEE]

          For value received, each Subsidiary Guarantor (which term includes any
successor Person under the Indenture) has, jointly and severally,
unconditionally guaranteed, to the extent set forth in the Indenture and subject
to the provisions in the Indenture dated as of August 19, 1998 (the "Indenture")
among Great Lakes Dredge & Dock Corporation, the Subsidiary Guarantors listed on
Schedule I thereto and The Bank of New York, as trustee (the "Trustee"), (a) the
due and punctual payment of the principal of, premium, if any, and interest on
the Notes (as defined in the Indenture), whether at maturity, by acceleration,
redemption or otherwise, the due and punctual payment of interest on overdue
principal and premium, and, to the extent permitted by law, interest, and the
due and punctual performance of all other obligations of the Company to the
Holders or the Trustee all in accordance with the terms of the Indenture and (b)
in case of any extension of time of payment or renewal of any Notes or any of
such other obligations, that the same will be promptly paid in full when due or
performed in accordance with the terms of the extension or renewal, whether at
stated maturity, by acceleration or otherwise. The obligations of the Subsidiary
Guarantors to the Holders of Notes and to the Trustee pursuant to the Subsidiary
Guarantee and the Indenture are expressly set forth in Article 11 of the
Indenture and reference is hereby made to the Indenture for the precise terms of
the Subsidiary Guarantee. Each Holder of a Note, by accepting the same, (a)
agrees to and shall be bound by such provisions, (b) authorizes and directs the
Trustee, on behalf of such Holder, to take such action as may be necessary or
appropriate to effectuate the subordination as provided in the Indenture and (c)
appoints the Trustee attorney-in-fact of such Holder for such purpose; provided,
however, that the Indebtedness evidenced by this Subsidiary Guarantee shall
cease to be so subordinated and subject in right of payment upon any defeasance
of this Note in accordance with the provisions of the Indenture.


                                 [Name of Subsidiary Guarantor(s)]


                                 By:____________________________________________
                                 Name:
                                 Title:

                                      E-1
<PAGE>
 
                                                                       EXHIBIT F

                        [FORM OF SUPPLEMENTAL INDENTURE

             TO BE DELIVERED BY SUBSEQUENT SUBSIDIARY GUARANTORS]

          SUPPLEMENTAL INDENTURE (this "Supplemental Indenture"), dated as of
________________, among __________________ (the "Guaranteeing Subsidiary"), a
subsidiary of Great Lakes Dredge & Dock Corporation (or its permitted
successor), a Delaware corporation (the "Company"), the Company, the other
Subsidiary Guarantors (as defined in the Indenture referred to herein) and The
Bank of New York, as trustee under the indenture referred to below (the
"Trustee").

                              W I T N E S S E T H

          WHEREAS, the Company has heretofore executed and delivered to the
Trustee an indenture (the "Indenture"), dated as of August 19, 1998 providing
for the issuance of an aggregate principal amount of up to $165,000,000 of 11
1/4% Senior Subordinated Notes due 2008 (the "Notes");

          WHEREAS, the Indenture provides that under certain circumstances the
Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental
indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally
guarantee all of the Company's Obligations under the Notes and the Indenture on
the terms and conditions set forth herein (the "Subsidiary Guarantee"); and

          WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is
authorized to execute and deliver this Supplemental Indenture.

          NOW THEREFORE, in consideration of the foregoing and for other good
and valuable consideration, the receipt of which is hereby acknowledged, the
Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the
equal and ratable benefit of the Holders of the Notes as follows:

          1.   CAPITALIZED TERMS.  Capitalized terms used herein without
definition shall have the meanings assigned to them in the Indenture.

          2.   AGREEMENT TO GUARANTEE.  The Guaranteeing Subsidiary hereby
     agrees as follows:

               (a)  Along with all Subsidiary Guarantors named in the Indenture,
     to jointly and severally Guarantee to each Holder of a Note authenticated
     and delivered by the Trustee and to the Trustee and its successors and
     assigns, the Notes or the obligations of the Company hereunder or
     thereunder, that:

                    (i)  the principal of and interest on the Notes will be
          promptly paid in full when due, whether at maturity, by acceleration,
          redemption or otherwise, and interest on the overdue principal of and
          interest on the Notes, if any, if lawful, and all other obligations of
          the Company to the Holders or the Trustee hereunder or thereunder will
          be promptly paid in full or performed, all in accordance with the
          terms hereof and thereof; and

                    (ii) in case of any extension of time of payment or renewal
          of any Notes or any of such other obligations, that same will be
          promptly paid in full when due or performed in

                                      F-1
<PAGE>
 
          accordance with the terms of the extension or renewal, whether at
          stated maturity, by acceleration or otherwise. Failing payment when
          due of any amount so guaranteed or any performance so guaranteed for
          whatever reason, the Subsidiary Guarantors shall be jointly and
          severally obligated to pay the same immediately.

               (b)  The obligations hereunder shall be unconditional,
     irrespective of the validity, regularity or enforceability of the Notes or
     the Indenture, the absence of any action to enforce the same, any waiver or
     consent by any Holder of the Notes with respect to any provisions hereof or
     thereof, the recovery of any judgment against the Company, any action to
     enforce the same or any other circumstance which might otherwise constitute
     a legal or equitable discharge or defense of a guarantor.

               (c)  The following is hereby waived: diligence, presentment,
     demand of payment, filing of claims with a court in the event of insolvency
     or bankruptcy of the Company, any right to require a proceeding first
     against the Company, protest, notice and all demands whatsoever.

               (d)  This Subsidiary Guarantee shall not be discharged except by
     complete performance of the obligations contained in the Notes and the
     Indenture, and the Guaranteeing Subsidiary accepts all obligations of a
     Subsidiary Guarantor under the Indenture.

               (e)  If any Holder or the Trustee is required by any court or
     otherwise to return to the Company, the Subsidiary Guarantors, or any
     Custodian, Trustee, liquidator or other similar official acting in relation
     to either the Company or the Subsidiary Guarantors, any amount paid by
     either to the Trustee or such Holder, this Subsidiary Guarantee, to the
     extent theretofore discharged, shall be reinstated in full force and
     effect.

               (f)  The Guaranteeing Subsidiary shall not be entitled to any
     right of subrogation in relation to the Holders in respect of any
     obligations guaranteed hereby until payment in full of all obligations
     guaranteed hereby.

               (g)  As between the Subsidiary Guarantors, on the one hand, and
     the Holders and the Trustee, on the other hand, (x) the maturity of the
     obligations guaranteed hereby may be accelerated as provided in Article 6
     of the Indenture for the purposes of this Subsidiary Guarantee,
     notwithstanding any stay, injunction or other prohibition preventing such
     acceleration in respect of the obligations guaranteed hereby, and (y) in
     the event of any declaration of acceleration of such obligations as
     provided in Article 6 of the Indenture, such obligations (whether or not
     due and payable) shall forthwith become due and payable by the Subsidiary
     Guarantors for the purpose of this Subsidiary Guarantee.

               (h)  The Subsidiary Guarantors shall have the right to seek
     contribution from any non-paying Subsidiary Guarantor so long as the
     exercise of such right does not impair the rights of the Holders under the
     Guarantee.

               (i)  Pursuant to Section 11.02 of the Indenture, after giving
     effect to any maximum amount and any other contingent and fixed liabilities
     that are relevant under any applicable

                                      F-2
<PAGE>
 
     Bankruptcy or fraudulent conveyance laws, and after giving effect to any
     collections from, rights to receive contribution from or payments made by
     or on behalf of any other Subsidiary Guarantor in respect of the
     obligations of such other Subsidiary Guarantor under Article 11 of the
     Indenture, this new Subsidiary Guarantee shall be limited to the maximum
     amount permissible such that the obligations of such Subsidiary Guarantor
     under this Subsidiary Guarantee will not constitute a fraudulent transfer
     or conveyance.

          3.   EXECUTION AND DELIVERY.  Each Guaranteeing Subsidiary agrees that
the Subsidiary Guarantees shall remain in full force and effect notwithstanding
any failure to endorse on each Note a notation of such Subsidiary Guarantee.

          4.   GUARANTEEING SUBSIDIARY MAY CONSOLIDATE, ETC. ON CERTAIN TERMS.

          (a)  The Guaranteeing Subsidiary may not consolidate with or merge
with or into (whether or not such Subsidiary Guarantor is the surviving Person)
another corporation, Person or entity whether or not affiliated with such
Subsidiary Guarantor unless:

               (i)  subject to Sections 11.05 and 11.06 of the Indenture, the
     Person formed by or surviving any such consolidation or merger (if other
     than a Subsidiary Guarantor or the Company) unconditionally assumes all the
     obligations of such Subsidiary Guarantor, pursuant to a supplemental
     indenture in form and substance reasonably satisfactory to the Trustee,
     under the Notes, the Indenture and the Subsidiary Guarantee on the terms
     set forth herein or therein; and

               (ii) immediately after giving effect to such transaction, no
     Default or Event of Default exists.

          (b)  In case of any such consolidation, merger, sale or conveyance and
upon the assumption by the successor corporation, by supplemental indenture,
executed and delivered to the Trustee and satisfactory in form to the Trustee,
of the Subsidiary Guarantee endorsed upon the Notes and the due and punctual
performance of all of the covenants and conditions of the Indenture to be
performed by the Subsidiary Guarantor, such successor corporation shall succeed
to and be substituted for the Subsidiary Guarantor with the same effect as if it
had been named herein as a Subsidiary Guarantor. Such successor corporation
thereupon may cause to be signed any or all of the Subsidiary Guarantees to be
endorsed upon all of the Notes issuable hereunder which theretofore shall not
have been signed by the Company and delivered to the Trustee. All the Subsidiary
Guarantees so issued shall in all respects have the same legal rank and benefit
under the Indenture as the Subsidiary Guarantees theretofore and thereafter
issued in accordance with the terms of the Indenture as though all of such
Subsidiary Guarantees had been issued at the date of the execution hereof.

          (c)  Except as set forth in Articles 4 and 5 and Section 11.05 of
Article 11 of the Indenture, and notwithstanding clauses (a) and (b) above,
nothing contained in the Indenture or in any of the Notes shall prevent any
consolidation or merger of a Subsidiary Guarantor with or into the Company or
another Subsidiary Guarantor, or shall prevent any sale or conveyance of the
property of a Subsidiary Guarantor as an entirety or substantially as an
entirety to the Company or another Subsidiary Guarantor.

                                      F-3
<PAGE>
 
          5.   RELEASES.

          (a)  In the event of a sale or other disposition of all of the assets
of any Subsidiary Guarantor, by way of merger, consolidation or otherwise, or a
sale or other disposition of all to the capital stock of any Subsidiary
Guarantor, in each case to a Person that is not (either before or after giving
effect to such transaction) a Restricted Subsidiary of the Company, then such
Subsidiary Guarantor (in the event of a sale or other disposition, by way of
merger, consolidation or otherwise, of all of the capital stock of such
Subsidiary Guarantor) or the corporation acquiring the property (in the event of
a sale or other disposition of all or substantially all of the assets of such
Subsidiary Guarantor) will be released and relieved of any obligations under its
Subsidiary Guarantee; provided that the Net Proceeds of such sale or other
disposition are applied in accordance with the applicable provisions of the
Indenture, including without limitation Section 4.10 of the Indenture. Upon
delivery by the Company to the Trustee of an Officers' Certificate and an
Opinion of Counsel to the effect that such sale or other disposition was made by
the Company in accordance with the provisions of the Indenture, including
without limitation Section 4.10 of the Indenture, the Trustee shall execute any
documents reasonably required in order to evidence the release of any Subsidiary
Guarantor from its obligations under its Subsidiary Guarantee.

          (b)  Any Subsidiary Guarantor not released from its obligations under
its Subsidiary Guarantee shall remain liable for the full amount of principal of
and interest on the Notes and for the other obligations of any Subsidiary
Guarantor under the Indenture as provided in Article 11 of the Indenture.

          6.   NO RECOURSE AGAINST OTHERS.  No past, present or future director,
officer, employee, incorporator, stockholder or agent of the Guaranteeing
Subsidiary, as such, shall have any liability for any obligations of the Company
or any Guaranteeing Subsidiary under the Notes, any Subsidiary Guarantees, the
Indenture or this Supplemental Indenture or for any claim based on, in respect
of, or by reason of, such obligations or their creation. Each Holder of the
Notes by accepting a Note waives and releases all such liability. The waiver and
release are part of the consideration for issuance of the Notes. Such waiver may
not be effective to waive liabilities under the federal securities laws and it
is the view of the SEC that such a waiver is against public policy.

          7.   NEW YORK LAW TO GOVERN.  THE INTERNAL LAW OF THE STATE OF NEW
YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE BUT
WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT
THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED
THEREBY.

          8.   COUNTERPARTS  The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of them
together represent the same agreement.

          9.   EFFECT OF HEADINGS.  The Section headings herein are for
convenience only and shall not affect the construction hereof.

                                      F-4
<PAGE>
 
          10.  THE TRUSTEE.  The Trustee shall not be responsible in any manner
whatsoever for or in respect of the validity or sufficiency of this Supplemental
Indenture or for or in respect of the recitals contained herein, all of which
recitals are made solely by the Guaranteeing Subsidiary and the Company.

                                      F-5
<PAGE>
 
          IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed and attested, all as of the date first above
written.

Dated:  _______________, ____

                                   [GUARANTEEING SUBSIDIARY]

                                   By: _______________________________
                                   Name:
                                   Title:

                                   GREAT LAKES DREDGE & DOCK CORPORATION

                                   By: _______________________________
                                   Name:
                                   Title:

                                   [EXISTING SUBSIDIARY GUARANTORS]

                                   By: _______________________________
                                   Name:
                                   Title:

                                   THE BANK OF NEW YORK,
                                   as Trustee

                                   By: _______________________________
                                   Name:
                                   Title:

                                      F-6
<PAGE>
 
                                  SCHEDULE I

                       SCHEDULE OF SUBSIDIARY GUARANTORS

          The following schedule lists each Subsidiary Guarantor under the
Indenture as of the date of the Indenture:


Great Lakes International, Inc.
Great Lakes Dredge & Dock Company
Dawson Dredging Company
Gates Construction Corp.
Fifty-Three Dredging Corporation

<PAGE>
 
                                                                    EXHIBIT 4.02


================================================================================


                         REGISTRATION RIGHTS AGREEMENT


                          DATED AS OF AUGUST 19, 1998

                                 BY AND AMONG

                     GREAT LAKES DREDGE & DOCK CORPORATION

                  THE SUBSIDIARY GUARANTORS SET FORTH HEREIN

                                      AND

                         DONALDSON, LUFKIN & JENRETTE

                            SECURITIES CORPORATION


================================================================================
<PAGE>
 
    This Registration Rights Agreement (this "AGREEMENT") is made and entered
                                              ---------                      
into as of August 19, 1998, by and among Great Lakes Dredge and Dock
Corporation, a Delaware corporation (the "COMPANY"), the Subsidiary Guarantors
                                          -------                             
set forth on the signature pages hereto (each, a "SUBSIDIARY GUARANTOR" and,
                                                  --------------------      
collectively, the "SUBSIDIARY GUARANTORS"), and Donaldson, Lufkin & Jenrette
                   ---------------------                                    
Securities Corporation (the "INITIAL PURCHASER"), who has agreed to purchase the
                             -----------------                                  
Company's 11 1/4% Senior Subordinated Notes due 2008 (the "SENIOR SUBORDINATED
                                                           -------------------
NOTES") pursuant to the Purchase Agreement (as defined below).
- -----                                                         

    This Agreement is made pursuant to the Purchase Agreement, dated August 14,
1998, (the "PURCHASE AGREEMENT"), by and among the Company, the Subsidiary
            ------------------                                            
Guarantors and the Initial Purchaser.  In order to induce the Initial Purchaser
to purchase the Senior Subordinated Notes, the Company has agreed to provide the
registration rights set forth in this Agreement.  The execution and delivery of
this Agreement is a condition to the obligations of the Initial Purchaser set
forth in Section 2 of the Purchase Agreement.  Capitalized terms used herein and
not otherwise defined shall have the meaning assigned to them in the Indenture,
dated August 19, 1998, among the Company, the Subsidiary Guarantors and The Bank
of New York, as Trustee, relating to the Senior Subordinated Notes and the New
Senior Subordinated Notes (the "INDENTURE").
                                ---------   

    The parties hereby agree as follows:

SECTION 1.  DEFINITIONS

    As used in this Agreement, the following capitalized terms shall have the
following meanings:

    ACT:  The Securities Act of 1933, as amended.
    ---                                          

    AFFILIATE:  As defined in Rule 144 of the Act.
    ---------                                     

    BROKER-DEALER:  Any broker or dealer registered under the Exchange Act.
    -------------                                                          

    CERTIFICATED SECURITIES:  Definitive Notes, as defined in the Indenture.
    -----------------------                                                 

    CLOSING DATE:  The date hereof.
    ------------                   

    COMMISSION:  The Securities and Exchange Commission.
    ----------                                          

    CONSUMMATE:  An Exchange Offer shall be deemed "Consummated" for purposes of
    ----------                                                                  
this Agreement upon the occurrence of (a) the filing and effectiveness under the
Act of the Exchange Offer Registration Statement relating to the New Senior
Subordinated Notes to be issued in the Exchange Offer, (b) the maintenance of
such Exchange Offer Registration Statement continuously effective and the
keeping of the Exchange Offer open for a period not less than the period
required pursuant to Section 3(b) hereof and (c) the delivery by the Company to
the Registrar under the Indenture of New Senior Subordinated Notes in the same
aggregate principal
<PAGE>
 
amount as the aggregate principal amount of Senior Subordinated Notes tendered
by Holders thereof pursuant to the Exchange Offer.

    CONSUMMATION DEADLINE:  As defined in Section 3(b) hereof.
    ---------------------                                     

    EFFECTIVENESS DEADLINE:  As defined in Section 3(a) and 4(a) hereof.
    ----------------------                                              

    EXCHANGE ACT:  The Securities Exchange Act of 1934, as amended.
    ------------                                                   

    EXCHANGE OFFER:  The exchange and issuance by the Company of a principal
    --------------                                                          
amount of New Senior Subordinated Notes (which shall be registered pursuant to
the Exchange Offer Registration Statement) equal to the outstanding principal
amount of Senior Subordinated Notes that are tendered by such Holders in
connection with such exchange and issuance.

    EXCHANGE OFFER REGISTRATION STATEMENT:  The Registration Statement relating
    -------------------------------------                                      
to the Exchange Offer, including the related Prospectus.

    EXEMPT RESALES:  The transactions in which the Initial Purchaser proposes to
    --------------                                                              
sell the Senior Subordinated Notes to certain "qualified institutional buyers,"
as such term is defined in Rule 144A under the Act and pursuant to Regulation S
under the Act.

    FILING DEADLINE:  As defined in Sections 3(a) and 4(a) hereof.
    ---------------                                               

    HOLDERS:  As defined in Section 2 hereof.
    -------                                  

    NEW SENIOR SUBORDINATED NOTES:  The Company's 11 1/4% Senior Subordinated
    -----------------------------                                            
Notes due 2008 to be issued pursuant to the Indenture:  (i) in the Exchange
Offer or (ii) as contemplated by Section 4 hereof.

    PROSPECTUS:  The prospectus included in a Registration Statement at the time
    ----------                                                                  
such Registration Statement is declared effective, as amended or supplemented by
any prospectus supplement and by all other amendments thereto, including post-
effective amendments, and all material incorporated by reference into such
Prospectus.

    RECOMMENCEMENT DATE: As defined in Section 6(d) hereof.
    -------------------                                    

    REGISTRATION DEFAULT:  As defined in Section 5 hereof.
    --------------------                                  

    REGISTRATION STATEMENT:  Any registration statement of the Company and the
    ----------------------                                                    
Subsidiary Guarantors relating to (a) an offering of New Senior Subordinated
Notes pursuant to an Exchange Offer or (b) the registration for resale of
Transfer Restricted Securities pursuant to the Shelf Registration Statement, in
each case, (i) that is filed pursuant to the provisions of this Agreement and
(ii) including the Prospectus included therein, all amendments and supplements
thereto (including post-effective amendments) and all exhibits and material
incorporated by reference therein.

                                       2
<PAGE>
 
    REGULATION S:  Regulation S promulgated under the Act.
    ------------                                          

    RULE 144:  Rule 144 promulgated under the Act.
    --------                                      

    SHELF REGISTRATION STATEMENT:  As defined in Section 4 hereof.
    ----------------------------                                  

    SUSPENSION NOTICE:  As defined in Section 6(d) hereof.
    -----------------                                     

    TIA:  The Trust Indenture Act of 1939 (15 U.S.C. Sections 77aaa-77bbbb) as
    ---                                                                       
in effect on the date of the Indenture.

    TRANSFER RESTRICTED SECURITIES:  Each (A) Senior Subordinated Note, until
    ------------------------------                                           
the earliest to occur of (i) the date on which such Senior Subordinated Note is
exchanged in the Exchange Offer for a New Senior Subordinated Note which is
entitled to be resold to the public by the Holder thereof without complying with
the prospectus delivery requirements of the Act, (ii) the date on which such
Senior Subordinated Note has been disposed of in accordance with a Shelf
Registration Statement (and the purchasers thereof have been issued New Senior
Subordinated Notes), or (iii) the date on which such Senior Subordinated Note is
distributed to the public pursuant to Rule 144 under the Act and each (B) New
Senior Subordinated Note held by a Broker Dealer until the date on which such
New Senior Subordinated Note is disposed of by a Broker-Dealer pursuant to the
"Plan of Distribution" contemplated by the Exchange Offer Registration Statement
(including the delivery of the Prospectus contained therein).

SECTION 2.  HOLDERS

    A Person is deemed to be a holder of Transfer Restricted Securities (each, a
"HOLDER") whenever such Person owns Transfer Restricted Securities.
 ------                                                            

SECTION 3.  REGISTERED EXCHANGE OFFER

    (a) Unless the Exchange Offer shall not be permitted by applicable federal
law (after the procedures set forth in Section 6(a)(i) below have been complied
with), the Company and the Subsidiary Guarantors shall (i) cause the Exchange
Offer Registration Statement to be filed with the Commission as soon as
practicable after the Closing Date, but in no event later than 60 days after the
Closing Date (such 60th day being the "FILING DEADLINE"), (ii) use its best
                                       ---------------                     
efforts to cause such Exchange Offer Registration Statement to become effective
at the earliest possible time, but in no event later than 180 days after the
Closing Date (such 180th day being the "EFFECTIVENESS DEADLINE"), (iii) in
                                        ----------------------            
connection with the foregoing, (A) file all pre-effective amendments to such
Exchange Offer Registration Statement as may be necessary in order to cause it
to become effective, (B) file, if applicable, a post-effective amendment to such
Exchange Offer Registration Statement pursuant to Rule 430A under the Act and
(C) cause all necessary filings, if any, in connection with the registration and
qualification of the New Senior Subordinated Notes to be made under the Blue Sky
laws of such jurisdictions as are necessary to permit Consummation of the
Exchange Offer, and (iv) upon the effectiveness of such Exchange Offer
Registration Statement,

                                       3
<PAGE>
 
commence and Consummate the Exchange Offer. The Exchange Offer shall be on the
appropriate form permitting (i) registration of the New Senior Subordinated
Notes to be offered in exchange for the Senior Subordinated Notes that are
Transfer Restricted Securities and (ii) resales of New Senior Subordinated Notes
by Broker-Dealers that tendered into the Exchange Offer Senior Subordinated
Notes that such Broker-Dealer acquired for its own account as a result of market
making activities or other trading activities (other than Senior Subordinated
Notes acquired directly from the Company or any of its Affiliates) as
contemplated by Section 3(c) below.

    (b) The Company and the Subsidiary Guarantors shall use their respective
best efforts to cause the Exchange Offer Registration Statement to be effective
continuously, and shall keep the Exchange Offer open for a period of not less
than the minimum period required under applicable federal and state securities
laws to Consummate the Exchange Offer; provided, however, that in no event shall
such period be less than 20 Business Days.  The Company and the Subsidiary
Guarantors shall cause the Exchange Offer to comply with all applicable federal
and state securities laws.  No securities other than the New Senior Subordinated
Notes shall be included in the Exchange Offer Registration Statement.  The
Company and the Subsidiary Guarantors shall use their respective best efforts to
cause the Exchange Offer to be Consummated on the earliest practicable date
after the Exchange Offer Registration Statement has become effective, but in no
event later than 30 business days thereafter (such 30/th/ day being the
"CONSUMMATION DEADLINE").
 ---------------------   

    (c) The Company shall include a "Plan of Distribution" section in the
Prospectus contained in the Exchange Offer Registration Statement and indicate
therein that any Broker-Dealer who holds Transfer Restricted Securities that
were acquired for the account of such Broker-Dealer as a result of market-making
activities or other trading activities (other than Senior Subordinated Notes
acquired directly from the Company or any Affiliate of the Company), may
exchange such Transfer Restricted Securities pursuant to the Exchange Offer.
Such "Plan of Distribution" section shall also contain all other information
with respect to such sales by such Broker-Dealers that the Commission may
require in order to permit such sales pursuant thereto, but such "Plan of
Distribution" shall not name any such Broker-Dealer or disclose the amount of
Transfer Restricted Securities held by any such Broker-Dealer, except to the
extent required by the Commission as a result of a change in policy, rules or
regulations after the date of this Agreement.

    Because such Broker-Dealer may be deemed to be an "underwriter" within the
meaning of the Act and must, therefore, deliver a prospectus meeting the
requirements of the Act in connection with its initial sale of any New Senior
Subordinated Notes received by such Broker-Dealer in the Exchange Offer, the
Company and the Subsidiary Guarantors shall permit the use of the Prospectus
contained in the Exchange Offer Registration Statement by such Broker-Dealer to
satisfy such prospectus delivery requirement.  To the extent necessary to ensure
that the prospectus contained in the Exchange Offer Registration Statement is
available for sales of New Senior Subordinated Notes by Broker-Dealers, the
Company and the Subsidiary Guarantors agree to use their respective reasonable
best efforts to keep the Exchange Offer Registration Statement continuously
effective, supplemented, amended and current as required by and subject to the
provisions of Section 6(a) and (c) hereof and in conformity with the
requirements of this Agreement, the Act and the policies,

                                       4
<PAGE>
 
rules and regulations of the Commission as announced from time to time, for a
period of 180 days from the Consummation Deadline or such shorter period as will
terminate when all Transfer Restricted Securities covered by such Registration
Statement have been sold pursuant thereto. The Company and the Subsidiary
Guarantors shall provide sufficient copies of the latest version of such
Prospectus to such Broker-Dealers, promptly upon request, and in no event later
than two business days after such request, at any time during such period.

SECTION 4.  SHELF REGISTRATION

    (a) Shelf Registration.  If (i) the Exchange Offer is not permitted by
        ------------------                                                
applicable law (after the Company and the Subsidiary Guarantors have complied
with the procedures set forth in Section 6(a)(i) below) or (ii) if any Holder of
Transfer Restricted Securities shall notify the Company within 20 Business Days
following the Consummation Deadline that (A) such Holder was prohibited by law
or Commission policy from participating in the Exchange Offer or (B) such Holder
may not resell the New Senior Subordinated Notes acquired by it in the Exchange
Offer to the public without delivering a prospectus and the Prospectus contained
in the Exchange Offer Registration Statement is not appropriate or available for
such resales by such Holder or (C) such Holder is a Broker-Dealer and holds
Senior Subordinated Notes acquired directly from the Company or any of its
Affiliates, then the Company and the Subsidiary Guarantors shall:

  (x) cause to be filed, on or prior to 60 days after the earlier of (i) the
date on which the Company determines that the Exchange Offer Registration
Statement cannot be filed as a result of clause (a)(i) above and (ii) the date
on which the Company receives the notice specified in clause (a)(ii) above (such
earlier date, the "FILING DEADLINE"), a shelf registration statement pursuant to
                   ---------------                                              
Rule 415 under the Act (which may be an amendment to the Exchange Offer
Registration Statement) (in either case, the "SHELF REGISTRATION STATEMENT"),
                                              ----------------------------   
relating to all Transfer Restricted Securities, and

  (y) use their respective best efforts to cause such Shelf Registration
Statement to become effective on or prior to 180 days after the Filing Deadline
for the Shelf Registration Statement (such 180th day the "EFFECTIVENESS
                                                          -------------
DEADLINE").
- --------

      If, after the Company has filed an Exchange Offer Registration Statement
that satisfies the requirements of Section 3(a) above, the Company is required
to file and make effective a Shelf Registration Statement solely because the
Exchange Offer is not permitted under applicable federal law (i.e., clause
(a)(i) above), then the filing of the Exchange Offer Registration Statement
shall be deemed to satisfy the requirements of clause (x) above; provided that,
in such event, the Company shall remain obligated to meet the Effectiveness
Deadline set forth in clause (y).

      To the extent necessary to ensure that the Shelf Registration Statement is
available for sales of Transfer Restricted Securities by the Holders thereof
entitled to the benefit of this Section 4(a) and the other securities required
to be registered therein pursuant to Section 6(b)(ii) hereof, the Company and
the Subsidiary Guarantors shall use their respective best efforts to keep any
Shelf Registration Statement required by this Section 4(a) continuously
effective, supplemented,

                                       5
<PAGE>
 
amended and current as required by and subject to the provisions of Sections
6(b) and (c) hereof and in conformity with the requirements of this Agreement,
the Act and the policies, rules and regulations of the Commission as announced
from time to time, for a period of at least two years (as extended pursuant to
Section 6(c)(i)) following the Closing Date, or such shorter period as will
terminate when all Transfer Restricted Securities covered by such Shelf
Registration Statement have been sold pursuant thereto. Notwithstanding the
foregoing, following the date on which such Shelf Registration Statement first
becomes effective under the Act, the Company may suspend the effectiveness of
the Shelf Registration Statement by prior written notice to the Holders for a
period not to exceed 30 days in any twelve month period if (i) an event occurs
and is continuing as a result of which the Shelf Registration Statement would,
in the reasonable good faith judgment of the Company's Board of Directors,
contain an untrue statement of a material fact or omit to state a material fact
necessary in order to make the statements therein not misleading and (ii)(A) the
Company's Board of Directors reasonably determines in good faith that the
disclosure of such event at such time would have a material adverse effect on
the business, operations or prospects of the Company and its subsidiaries, taken
as a whole, or (B) the disclosure otherwise relates to a previously undisclosed
pending material business transaction, the disclosure of which would, in the
reasonable good faith judgment of the Company's Board of Directors, impede the
Company's ability to consummate such transaction.

    (b) Provision by Holders of Certain Information in Connection with the Shelf
        ------------------------------------------------------------------------
Registration Statement.  No Holder of Transfer Restricted Securities may include
- ----------------------                                                          
any of its Transfer Restricted Securities in any Shelf Registration Statement
pursuant to this Agreement unless and until such Holder furnishes to the Company
in writing, within 15 days after receipt of a request therefor, the information
specified in Item 507 or 508 of Regulation S-K, as applicable, of the Act for
use in connection with any Shelf Registration Statement or Prospectus or
preliminary Prospectus included therein.  No Holder of Transfer Restricted
Securities shall be entitled to liquidated damages pursuant to Section 5 hereof
unless and until such Holder shall have provided all such information.  Each
selling Holder agrees to promptly furnish additional information required to be
disclosed in order to make the information previously furnished to the Company
by such Holder not materially misleading.

SECTION 5.  LIQUIDATED DAMAGES

    If (i) any Registration Statement required by this Agreement is not filed
with the Commission on or prior to the applicable Filing Deadline, (ii) any such
Registration Statement has not been declared effective by the Commission on or
prior to the applicable Effectiveness Deadline, (iii) the Exchange Offer has not
been Consummated on or prior to the Consummation Deadline or (iv) any
Registration Statement required by this Agreement is filed and declared
effective but shall thereafter cease to be effective or fail to be usable for
its intended purpose without being succeeded within 5 days by a post-effective
amendment to such Registration Statement that cures such failure and that is
itself declared effective within 5 days of filing such post-effective amendment
to such Registration Statement (each such event referred to in clauses (i)
through (iv), a "REGISTRATION DEFAULT"), then the Company and the Subsidiary
                 --------------------                                       
Guarantors hereby jointly and severally agree to

                                       6
<PAGE>
 
pay to each Holder of Transfer Restricted Securities affected thereby liquidated
damages in an amount equal to $.05 per week per $1,000 in principal amount of
Transfer Restricted Securities held by such Holder for each week or portion
thereof that the Registration Default continues for the first 90-day period
immediately following the occurrence of such Registration Default. The amount of
the liquidated damages shall increase by an additional $.05 per week per $1,000
in principal amount of Transfer Restricted Securities with respect to each
subsequent 90-day period until all Registration Defaults have been cured, up to
a maximum amount of liquidated damages of $.50 per week per $1,000 in principal
amount of Transfer Restricted Securities; provided that the Company and the
Subsidiary Guarantors shall in no event be required to pay liquidated damages
for more than one Registration Default at any given time. Notwithstanding
anything to the contrary set forth herein, (1) upon filing of the Exchange Offer
Registration Statement (and/or, if applicable, the Shelf Registration
Statement), in the case of (i) above, (2) upon the effectiveness of the Exchange
Offer Registration Statement (and/or, if applicable, the Shelf Registration
Statement), in the case of (ii) above, (3) upon Consummation of the Exchange
Offer, in the case of (iii) above, or (4) upon the filing of a post-effective
amendment to the Registration Statement or an additional Registration Statement
that causes the Exchange Offer Registration Statement (and/or, if applicable,
the Shelf Registration Statement) to again be declared effective or made usable
in the case of (iv) above, the liquidated damages payable with respect to the
Transfer Restricted Securities as a result of such clause (i), (ii), (iii) or
(iv), as applicable, shall cease.

     All accrued liquidated damages shall be paid to the Holders entitled
thereto, in the manner provided for the payment of interest in the Indenture, on
each Interest Payment Date, as more fully set forth in the Indenture and the
Notes.  Notwithstanding the fact that any securities for which liquidated
damages are due cease to be Transfer Restricted Securities, all obligations of
the Company and the Subsidiary Guarantors to pay liquidated damages with respect
to securities shall survive until such time as such obligations with respect to
such securities shall have been satisfied in full.

SECTION 6.  REGISTRATION PROCEDURES

     (a)  Exchange Offer Registration Statement. In connection with the Exchange
          -------------------------------------
Offer, the Company and the Subsidiary Guarantors shall (x) comply with all
applicable provisions of Section 6(c) below, (y) use their respective best
efforts to effect such exchange and to permit the resale of New Senior
Subordinated Notes by Broker-Dealers that tendered in the Exchange Offer Senior
Subordinated Notes that such Broker-Dealer acquired for its own account as a
result of its market making activities or other trading activities (other than
Senior Subordinated Notes acquired directly from the Company or any of its
Affiliates) being sold in accordance with the intended method or methods of
distribution thereof, and (z) comply with all of the following provisions:

          (i)  If, following the date hereof there has been announced a change
     in Commission policy with respect to exchange offers such as the Exchange
     Offer, that in the reasonable opinion of counsel to the Company raises a
     substantial question as to whether the Exchange Offer is permitted by
     applicable federal law, the Company and the Subsidiary

                                       7
<PAGE>
 
     Guarantors hereby agree to seek a no-action letter or other favorable
     decision from the Commission allowing the Company and the Subsidiary
     Guarantors to Consummate an Exchange Offer for such Transfer Restricted
     Securities. The Company and the Subsidiary Guarantors hereby agree to
     pursue the issuance of such a decision to the Commission staff level, but
     shall not be required to take commercially unreasonable actions to effect a
     change in Commission policy. In connection with the foregoing, the Company
     and the Subsidiary Guarantors hereby agree to take all such other
     reasonable actions as may be requested by the Commission or otherwise
     required in connection with the issuance of such decision, including
     without limitation (A) participating in telephonic conferences with the
     Commission, (B) delivering to the Commission staff an analysis prepared by
     counsel to the Company setting forth the legal bases, if any, upon which
     such counsel has concluded that such an Exchange Offer should be permitted
     and (C) diligently pursuing a resolution (which need not be favorable) by
     the Commission staff.

          (ii)  As a condition to its participation in the Exchange Offer, each
     Holder of Transfer Restricted Securities (including, without limitation,
     any Holder who is a Broker Dealer) shall furnish, upon the request of the
     Company, prior to the Consummation of the Exchange Offer, a written
     representation to the Company and the Subsidiary Guarantors (which may be
     contained in the letter of transmittal contemplated by the Exchange Offer
     Registration Statement) to the effect that (A) it is not an Affiliate of
     the Company, (B) it is not engaged in, and does not intend to engage in,
     and has no arrangement or understanding with any person to participate in,
     a distribution of the New Senior Subordinated Notes to be issued in the
     Exchange Offer and (C) it is acquiring the New Senior Subordinated Notes in
     its ordinary course of business.  As a condition to its participation in
     the Exchange Offer each Holder using the Exchange Offer to participate in a
     distribution of the New Senior Subordinated Notes shall acknowledge and
     agree that, if the resales are of New Senior Subordinated Notes obtained by
     such Holder in exchange for Senior Subordinated Notes acquired directly
     from the Company or an Affiliate thereof, it (1) could not, under
     Commission policy as in effect on the date of this Agreement, rely on the
     position of the Commission enunciated in Morgan Stanley and Co., Inc.
                                              ----------------------------
     (available June 5, 1991) and Exxon Capital Holdings Corporation (available
                                  ----------------------------------           
     May 13, 1988), as interpreted in the Commission's letter to Shearman &
                                                                 ----------
     Sterling dated July 2, 1993, and similar no-action letters (including, if
     --------                                                                 
     applicable, any no-action letter obtained pursuant to clause (i) above),
     and (2) must comply with the registration and prospectus delivery
     requirements of the Act in connection with a secondary resale transaction
     and that such a secondary resale transaction must be covered by an
     effective registration statement containing the selling security holder
     information required by Item 507 or 508, as applicable, of Regulation S-K.

          (iii) Prior to effectiveness of the Exchange Offer Registration
     Statement, the Company and the Subsidiary Guarantors shall provide a
     supplemental letter to the Commission (A) stating that the Company and the
     Subsidiary Guarantors are registering the Exchange Offer in reliance on the
     position of the Commission enunciated in Exxon Capital Holdings Corporation
                                              ----------------------------------
     (available May 13, 1988), Morgan Stanley and Co., Inc. (available 
                               ----------------------------   

                                       8
<PAGE>
 
     June 5, 1991) as interpreted in the Commission's letter to Shearman &
                                                                ---------- 
     Sterling dated July 2, 1993, and, if applicable, any no-action letter
     --------
     obtained pursuant to clause (i) above, (B) including a representation that
     neither the Company nor any Subsidiary Guarantor has entered into any
     arrangement or understanding with any Person to distribute the New Senior
     Subordinated Notes to be received in the Exchange Offer and that, to the
     best of the Company's and each Subsidiary Guarantor's information and
     belief, each Holder participating in the Exchange Offer is acquiring the
     New Senior Subordinated Notes in its ordinary course of business and has no
     arrangement or understanding with any Person to participate in the
     distribution of the New Senior Subordinated Notes received in the Exchange
     Offer and (C) any other undertaking or representation required by the
     Commission as set forth in any no-action letter obtained pursuant to clause
     (i) above, if applicable.

     (b)  Shelf Registration Statement. In connection with the Shelf
          ---------------------------- 
Registration Statement, the Company and the Subsidiary Guarantors shall

          (i)  comply with all the provisions of Section 6(c) below and use
their respective best efforts to effect such registration to permit the sale of
the Transfer Restricted Securities being sold in accordance with the intended
method or methods of distribution thereof (as indicated in the information
furnished to the Company pursuant to Section 4(b) hereof), and pursuant thereto
the Company and the Subsidiary Guarantors will prepare and file with the
Commission a Registration Statement relating to the registration on any
appropriate form under the Act, which form shall be available for the sale of
the Transfer Restricted Securities in accordance with the intended method or
methods of distribution thereof within the time periods and otherwise in
accordance with the provisions hereof, and

          (ii) issue, upon the request of any Holder or purchaser of Senior
Subordinated Notes covered by any Shelf Registration Statement contemplated by
this Agreement, New Senior Subordinated Notes having an aggregate principal
amount equal to the aggregate principal amount of Senior Subordinated Notes sold
pursuant to the Shelf Registration Statement and surrendered to the Company for
cancellation; the Company shall register New Senior Subordinated Notes on the
Shelf Registration Statement for this purpose and issue the New Senior
Subordinated Notes to the purchaser(s) of securities subject to the Shelf
Registration Statement in the names as such purchaser(s) shall designate.

     (c)  General Provisions.  In connection with any Registration Statement and
          ------------------                                                    
any related Prospectus required by this Agreement, the Company and the
Subsidiary Guarantors shall:

          (i)  use their respective best efforts to keep such Registration
     Statement continuously effective and provide all requisite financial
     statements for the period specified in Section 3 or 4 of this Agreement, as
     applicable.  Upon the occurrence of any event that would cause any such
     Registration Statement or the Prospectus contained therein (A) to contain
     an untrue statement of material fact or omit to state any material fact
     necessary to 

                                       9
<PAGE>
 
     make the statements therein not misleading or (B) not to be effective and
     usable for resale of Transfer Restricted Securities during the period
     required by this Agreement, the Company and the Subsidiary Guarantors shall
     file promptly an appropriate amendment to such Registration Statement
     curing such defect, and, if Commission review is required, use their
     respective best efforts to cause such amendment to be declared effective as
     soon as practicable.

          (ii)  prepare and file with the Commission such amendments and post-
     effective amendments to the applicable Registration Statement as may be
     necessary to keep such Registration Statement effective for the applicable
     period set forth in Section 3 or 4 hereof, as the case may be; cause the
     Prospectus to be supplemented by any required Prospectus supplement, and as
     so supplemented to be filed pursuant to Rule 424 under the Act, and to
     comply fully with Rules 424, 430A and 462, as applicable, under the Act in
     a timely manner; and comply with the provisions of the Act with respect to
     the disposition of all securities covered by such Registration Statement
     during the applicable period in accordance with the intended method or
     methods of distribution by the sellers thereof set forth in such
     Registration Statement or supplement to the Prospectus;

          (iii) advise each Holder promptly and, if requested by such Holder,
     confirm such advice in writing, (A) when the Prospectus or any Prospectus
     supplement or post-effective amendment has been filed, and, with respect to
     any applicable Registration Statement or any post-effective amendment
     thereto, when the same has become effective, (B) of any request by the
     Commission for amendments to the Registration Statement or amendments or
     supplements to the Prospectus or for additional information relating
     thereto, (C) of the issuance by the Commission of any stop order suspending
     the effectiveness of the Registration Statement under the Act or of the
     suspension by any state securities commission of the qualification of the
     Transfer Restricted Securities for offering or sale in any jurisdiction, or
     the initiation of any proceeding for any of the preceding purposes, (D) of
     the existence of any fact or the happening of any event that makes any
     statement of a material fact made in the Registration Statement, the
     Prospectus, any amendment or supplement thereto or any document
     incorporated by reference therein untrue, or that requires the making of
     any additions to or changes in the Registration Statement in order to make
     the statements therein not misleading, or that requires the making of any
     additions to or changes in the Prospectus in order to make the statements
     therein, in the light of the circumstances under which they were made, not
     misleading.  If at any time the Commission shall issue any stop order
     suspending the effectiveness of the Registration Statement, or any state
     securities commission or other regulatory authority shall issue an order
     suspending the qualification or exemption from qualification of the
     Transfer Restricted Securities under state securities or Blue Sky laws, the
     Company and the Subsidiary Guarantors shall use their respective best
     efforts to obtain the withdrawal or lifting of such order at the earliest
     possible time;

                                       10
<PAGE>
 
          (iv)   subject to Section 6(c)(i), if any fact or event contemplated
     by Section 6(c)(iii)(D) above shall exist or have occurred, prepare a
     supplement or post-effective amendment to the Registration Statement or
     related Prospectus or any document incorporated therein by reference or
     file any other required document so that, as thereafter delivered to the
     purchasers of Transfer Restricted Securities, the Prospectus will not
     contain an untrue statement of a material fact or omit to state any
     material fact necessary to make the statements therein, in the light of the
     circumstances under which they were made, not misleading;

          (v)    furnish to each selling Holder in connection with such sale, if
     any, before filing with the Commission, copies of any Registration
     Statement or any Prospectus included therein or any amendments or
     supplements to any such Registration Statement or Prospectus (including all
     documents incorporated by reference after the initial filing of such
     Registration Statement), which documents will be subject to the review and
     comment of such Holders in connection with such sale, if any, for a period
     of at least five business days, and the Company will not file any such
     Registration Statement or Prospectus or any amendment or supplement to any
     such Registration Statement or Prospectus (including all such documents
     incorporated by reference) to which such selling Holders shall reasonably
     object within five business days after the receipt thereof. A selling
     Holder shall be deemed to have reasonably objected to such filing if such
     Registration Statement, amendment, Prospectus or supplement, as applicable,
     as proposed to be filed, contains an untrue statement of a material fact or
     omit to state any material fact necessary to make the statements therein
     not misleading or fails to comply with the applicable requirements of the
     Act;

          (vi)   promptly prior to the filing of any document that is to be
     incorporated by reference into a Registration Statement or Prospectus,
     provide copies of such document to each selling Holder in connection with
     such sale, if any, make the Company's and the Subsidiary Guarantors'
     representatives available for discussion of such document and other
     customary due diligence matters, and include such information in such
     document prior to the filing thereof as such selling Holders may reasonably
     request;

          (vii)  make available, at reasonable times, for inspection by each
     Holder and any attorney or accountant retained by such Holders, all
     financial and other records, pertinent corporate documents of the Company
     and the Subsidiary Guarantors and cause the Company's and the Subsidiary
     Guarantors' officers, directors and employees to supply all information
     reasonably requested by any such Holder, attorney or accountant in
     connection with such Registration Statement or any post-effective amendment
     thereto subsequent to the filing thereof and prior to its effectiveness;

          (viii) if requested by any Holders in connection with such exchange or
     sale, promptly include in any Registration Statement or Prospectus,
     pursuant to a supplement or post-effective amendment if necessary, such
     information as such Holders may reasonably 

                                       11
<PAGE>
 
     request to have included therein, including, without limitation,
     information relating to the "Plan of Distribution" of the Transfer
     Restricted Securities; and make all required filings of such Prospectus
     supplement or post-effective amendment as soon as practicable after the
     Company is notified of the matters to be included in such Prospectus
     supplement or post-effective amendment;

          (ix) furnish to each Holder in connection with such exchange or sale,
     without charge, at least one copy of the Registration Statement, as first
     filed with the Commission, and of each amendment thereto, including all
     documents incorporated by reference therein and all exhibits (including
     exhibits incorporated therein by reference);

          (x)  deliver to each Holder without charge, as many copies of the
     Prospectus (including each preliminary prospectus) and any amendment or
     supplement thereto as such Persons reasonably may request; the Company and
     the Subsidiary Guarantors hereby consent to the use (in accordance with
     law) of the Prospectus and any amendment or supplement thereto by each
     selling Holder in connection with the offering and the sale of the Transfer
     Restricted Securities covered by the Prospectus or any amendment or
     supplement thereto;

          (xi) upon the request of any Holder, enter into such agreements
     (including underwriting agreements) and make such representations and
     warranties and take all such other actions in connection therewith in order
     to expedite or facilitate the disposition of the Transfer Restricted
     Securities pursuant to any applicable Registration Statement contemplated
     by this Agreement as may be reasonably requested by any Holder in
     connection with any sale or resale pursuant to any applicable Registration
     Statement.  In such connection, the Company and the Subsidiary Guarantors
     shall:

          (A)  upon request of any Holder, furnish (or in the case of
       paragraphs (2) and (3), use its best efforts to cause to be furnished) to
       each Holder, upon Consummation of the Exchange Offer or upon the
       effectiveness of the Shelf Registration Statement, as the case may be:

               (1)  a certificate, dated such date, signed on behalf of the
          Company and each Subsidiary Guarantor by (x) the President or any
          Vice President and (y) a principal financial or accounting
          officer of the Company and such Subsidiary Guarantor, confirming,
          as of the date thereof, the matters set forth in Sections 6(y),
          9(a) and 9(b) of the Purchase Agreement and such other similar
          matters as such Holders may reasonably request;

               (2)  opinions, dated the date of Consummation of the
          Exchange Offer or the date of effectiveness of the Shelf
          Registration Statement, as the case may be, of counsel for the
          Company and the Subsidiary Guarantors covering matters similar to
          those set forth in paragraphs (e) and (f) of Section 9 of the
          Purchase Agreement and such other matter as such Holder may
          reasonably

                                       12
<PAGE>

          request, and in any event including a statement (which may be
          provided in a letter separate from the opinion) to the effect
          that such counsel has participated in conferences with officers
          and other representatives of the Company and the Subsidiary
          Guarantors, representatives of the independent public accountants
          for the Company and the Subsidiary Guarantors and have considered
          the matters required to be stated therein and the statements
          contained therein, although such counsel has not independently
          verified the accuracy, completeness or fairness of such
          statements; and that such counsel advises that, on the basis of
          the foregoing (relying as to materiality to the extent such
          counsel deems appropriate upon the statements of officers and
          other representatives of the Company and the Subsidiary
          Guarantors) and without independent check or verification), no
          facts came to such counsel's attention that caused such counsel
          to believe that the applicable Registration Statement, at the
          time such Registration Statement or any post-effective amendment
          thereto became effective and, in the case of the Exchange Offer
          Registration Statement, as of the date of Consummation of the
          Exchange Offer, contained an untrue statement of a material fact
          or omitted to state a material fact required to be stated therein
          or necessary to make the statements therein not misleading, or
          that the Prospectus contained in such Registration Statement as
          of its date and, in the case of the opinion dated the date of
          Consummation of the Exchange Offer, as of the date of
          Consummation, contained an untrue statement of a material fact or
          omitted to state a material fact necessary in order to make the
          statements therein, in the light of the circumstances under which
          they were made, not misleading. Without limiting the foregoing,
          such counsel may state further that such counsel assumes no
          responsibility for, and has not independently verified, the
          accuracy, completeness or fairness of the financial statements,
          notes and schedules and other financial data included in any
          Registration Statement contemplated by this Agreement or the
          related Prospectus; and

               (3)  a customary comfort letter, dated the date of
          Consummation of the Exchange Offer, or as of the date of
          effectiveness of the Shelf Registration Statement, as the case
          may be, from the Company's independent accountants, in the
          customary form and covering matters of the type customarily
          covered in comfort letters to underwriters in connection with
          underwritten offerings, and affirming the matters set forth in
          the comfort letters delivered pursuant to Section 9(h) of the
          Purchase Agreement; and

          (B)  deliver such other documents and certificates as may be
       reasonably requested by the selling Holders to evidence compliance with
       the matters covered in clause (A) above and with any customary conditions
       contained in the any agreement entered into by the Company and the
       Subsidiary Guarantors pursuant to this clause (xi);

                                       13
<PAGE>
 
        (xii)   prior to any public offering of Transfer Restricted Securities,
     cooperate with the selling Holders and their counsel in connection with the
     registration and qualification of the Transfer Restricted Securities under
     the securities or Blue Sky laws of such jurisdictions as the selling
     Holders may request and do any and all other acts or things necessary or
     advisable to enable the disposition in such jurisdictions of the Transfer
     Restricted Securities covered by the applicable Registration Statement;
     provided, however, that neither the Company nor any Subsidiary Guarantor
     shall be required to register or qualify as a foreign corporation where it
     is not now so qualified or to take any action that would subject it to the
     service of process in suits or to taxation, other than as to matters and
     transactions relating to the Registration Statement, in any jurisdiction
     where it is not now so subject;

        (xiii)  in connection with any sale of Transfer Restricted Securities
     that will result in such securities no longer being Transfer Restricted
     Securities, cooperate with the selling Holders to facilitate the timely
     preparation and delivery of certificates representing Transfer Restricted
     Securities to be sold and not bearing any restrictive legends; and to
     register such Transfer Restricted Securities in such denominations and such
     names as the selling Holders may request at least two business days prior
     to such sale of Transfer Restricted Securities;

        (xiv)   use their respective best efforts to cause the disposition of
     the Transfer Restricted Securities covered by the Registration Statement to
     be registered with or approved by such other governmental agencies or
     authorities as may be necessary to enable the seller or sellers thereof to
     consummate the disposition of such Transfer Restricted Securities, subject
     to the proviso contained in clause (xii) above;

        (xv)    provide a CUSIP number for all Transfer Restricted Securities
     not later than the effective date of a Registration Statement covering such
     Transfer Restricted Securities and provide the Trustee under the Indenture
     with printed certificates for the Transfer Restricted Securities which are
     in a form eligible for deposit with the Depository Trust Company;

        (xvi)   otherwise use their respective best efforts to comply with all
     applicable rules and regulations of the Commission, and make generally
     available to its security holders with regard to any applicable
     Registration Statement, as soon as practicable, a consolidated earnings
     statement meeting the requirements of Rule 158 (which need not be audited)
     covering a twelve-month period beginning after the effective date of the
     Registration Statement (as such term is defined in paragraph (c) of Rule
     158 under the Act);

        (xvii)  cause the Indenture to be qualified under the TIA not later than
     the effective date of the first Registration Statement required by this
     Agreement and, in connection therewith, cooperate with the Trustee and the
     Holders to effect such changes to the Indenture as may be required for such
     Indenture to be so qualified in accordance with the terms of the TIA; and
     execute and use its best efforts to cause the Trustee to execute, all
     documents that may be required to effect such changes and all other forms
     and documents 

                                       14
<PAGE>
 
     required to be filed with the Commission to enable such Indenture to be so
     qualified in a timely manner; and

        (xviii)  provide promptly to each Holder, upon request, each document
     filed with the Commission pursuant to the requirements of Section 13 or
     Section 15(d) of the Exchange Act.

     (d) Restrictions on Holders.  Each Holder agrees by acquisition of a
         -----------------------                                         
Transfer Restricted Security that, upon receipt of the notice referred to in
Section 6(c)(iii)(C) or any notice from the Company of the existence of any fact
of the kind described in Section 6(c)(iii)(D) hereof (in each case, a
"SUSPENSION NOTICE"), such Holder will forthwith discontinue disposition of
 -----------------                                                         
Transfer Restricted Securities pursuant to the applicable Registration Statement
until (i) such Holder has received copies of the supplemented or amended
Prospectus contemplated by Section 6(c)(iv) hereof, or (ii) such Holder is
advised in writing by the Company that the use of the Prospectus may be resumed,
and has received copies of any additional or supplemental filings that are
incorporated by reference in the Prospectus (in each case, the "RECOMMENCEMENT
                                                                --------------
DATE").  Each Holder receiving a Suspension Notice hereby agrees that it will
- ----                                                                         
either (i) destroy any Prospectuses, other than permanent file copies, then in
such Holder's possession which have been replaced by the Company with more
recently dated Prospectuses or (ii) deliver to the Company (at the Company's
expense) all copies, other than permanent file copies, then in such Holder's
possession of the Prospectus covering such Transfer Restricted Securities that
was current at the time of receipt of the Suspension Notice.  The time period
regarding the effectiveness of such Registration Statement set forth in Section
3 or 4 hereof, as applicable, shall be extended by a number of days equal to the
number of days in the period from and including the date of delivery of the
Suspension Notice to the date of delivery of the Recommencement Date.

SECTION 7.  REGISTRATION EXPENSES

     (a) All expenses incident to the Company's and the Subsidiary Guarantors'
performance of or compliance with this Agreement will be borne by the Company,
regardless of whether a Registration Statement becomes effective, including
without limitation:  (i) all registration and filing fees and expenses; (ii) all
fees and expenses of compliance with federal securities and state Blue Sky or
securities laws; (iii) all expenses of printing (including printing certificates
for the New Senior Subordinated Notes to be issued in the Exchange Offer and
printing of Prospectuses), messenger and delivery services and telephone; (iv)
all fees and disbursements of counsel for the Company, the Subsidiary Guarantors
and, subject to Section 7(b) below, the Holders of Transfer Restricted
Securities; (v) all application and filing fees in connection with listing the
New Senior Subordinated Notes on a national securities exchange or automated
quotation system pursuant to the requirements hereof; and (vi) all fees and
disbursements of independent certified public accountants of the Company and the
Subsidiary Guarantors (including the expenses of any special audit and comfort
letters required by or incident to such performance).

                                       15
<PAGE>
 
    The Company will, in any event, bear its and the Subsidiary Guarantors'
internal expenses (including, without limitation, all salaries and expenses of
its officers and employees performing legal or accounting duties), the expenses
of any annual audit and the fees and expenses of any Person, including special
experts, retained by the Company or the Subsidiary Guarantors.

    (b) In connection with any Registration Statement required by this Agreement
(including, without limitation, the Exchange Offer Registration Statement and
the Shelf Registration Statement), the Company and the Subsidiary Guarantors
will reimburse the Initial Purchaser and the Holders of Transfer Restricted
Securities who are tendering Senior Subordinated Notes into in the Exchange
Offer and/or selling or reselling Senior Subordinated Notes or New Senior
Subordinated Notes pursuant to the "Plan of Distribution" contained in the
Exchange Offer Registration Statement or the Shelf Registration Statement, as
applicable, for the reasonable fees and disbursements of not more than one
counsel, who shall be Latham & Watkins, unless another firm shall be chosen by
the Holders of a majority in principal amount of the Transfer Restricted
Securities for whose benefit such Registration Statement is being prepared.

SECTION 8.  INDEMNIFICATION

    (a) The Company and the Subsidiary Guarantors agree, jointly and severally,
to indemnify and hold harmless each Holder, its directors, officers and each
Person, if any, who controls such Holder (within the meaning of Section 15 of
the Act or Section 20 of the Exchange Act), from and against any and all losses,
claims, damages, liabilities, judgments, (including without limitation, any
reasonable legal or other reasonable expenses incurred in connection with
investigating or defending any matter, including any action that could give rise
to any such losses, claims, damages, liabilities or judgments) caused by any
untrue statement or alleged untrue statement of a material fact contained in any
Registration Statement, preliminary prospectus or Prospectus (or any amendment
or supplement thereto) provided by the Company to any Holder or any prospective
purchaser of New Senior Subordinated Notes or registered Senior Subordinated
Notes, or caused by any omission or alleged omission to state therein a material
fact required to be stated therein or necessary to make the statements therein
not misleading, except insofar as such losses, claims, damages, liabilities or
judgments are caused by an untrue statement or omission or alleged untrue
statement or omission that is based upon information relating to any of the
Holders furnished in writing to the Company by any of the Holders; provided,
however, that the foregoing indemnity agreement with respect to any Registration
Statement, preliminary prospectus or Prospectus shall not inure to the benefit
of any Holder who failed to deliver a final Prospectus (as then amended or
supplemented, provided by the Company to the several Holders in the requisite
quantity and on a timely basis to permit proper delivery on or prior to written
confirmation of such sale) to the person asserting any losses, claims, damages
and liabilities and judgments caused by any untrue statement or alleged untrue
statement of a material fact contained in any preliminary prospectus, or caused
by any omission or alleged omission to state therein a material fact required to
be stated therein or necessary to make the statements therein not misleading, if
such material misstatement or omission or alleged material misstatement or
omission was cured in the final 

                                       16
<PAGE>
 
Prospectus and it shall have been determined that such person would not have
incurred such losses, claims, damages and liabilities and judgments had the
final Prospectus been delivered.

    (b) Each Holder of Transfer Restricted agrees, severally and not jointly, to
indemnify and hold harmless the Company and the Subsidiary Guarantors, and their
respective directors and officers, and each person, if any, who controls (within
the meaning of Section 15 of the Act or Section 20 of the Exchange Act) the
Company, or the Subsidiary Guarantors to the same extent as the foregoing
indemnity from the Company and the Subsidiary Guarantors set forth in section
(a) above, but only with reference to information relating to such Holder
furnished in writing to the Company by such Holder expressly for use in any
Registration Statement.  In no event shall any Holder, its directors, officers
or any Person who controls such Holder be liable or responsible for any amount
in excess of the amount by which the total amount received by such Holder with
respect to its sale of Transfer Restricted Securities pursuant to a Registration
Statement exceeds (i) the amount paid by such Holder for such Transfer
Restricted Securities and (ii) the amount of any damages that such Holder, its
directors, officers or any Person who controls such Holder has otherwise been
required to pay by reason of such untrue or alleged untrue statement or omission
or alleged omission.

    (c) In case any action shall be commenced involving any person in respect of
which indemnity may be sought pursuant to Section 8(a) or 8(b) (the "INDEMNIFIED
                                                                     -----------
PARTY"), the indemnified party shall promptly notify the person against whom
- -----                                                                       
such indemnity may be sought (the "INDEMNIFYING PERSON") in writing and the
                                   -------------------                     
indemnifying party shall assume the defense of such action, including the
employment of counsel reasonably satisfactory to the indemnified party and the
payment of all fees and expenses of such counsel, as incurred (except that in
the case of any action in respect of which indemnity may be sought pursuant to
both Sections 8(a) and 8(b), a Holder shall not be required to assume the
defense of such action pursuant to this Section 8(c), but may employ separate
counsel and participate in the defense thereof, but the fees and expenses of
such counsel, except as provided below, shall be at the expense of the Holder).
Any indemnified party shall have the right to employ separate counsel in any
such action and participate in the defense thereof, but the fees and expenses of
such counsel shall be at the expense of the indemnified party unless (i) the
employment of such counsel shall have been specifically authorized in writing by
the indemnifying party, (ii) the indemnifying party shall have failed to assume
the defense of such action or employ counsel reasonably satisfactory to the
indemnified party or (iii) the named parties to any such action (including any
impleaded parties) include both the indemnified party and the indemnifying
party, and the indemnified party shall have been advised by such counsel that
there may be one or more legal defenses available to it which are different from
or additional to those available to the indemnifying party (in which case the
indemnifying party shall not have the right to assume the defense of such action
on behalf of the indemnified party).  In any such case, the indemnifying party
shall not, in connection with any one action or separate but substantially
similar or related actions in the same jurisdiction arising out of the same
general allegations or circumstances, be liable for the fees and expenses of
more than one separate firm of attorneys (in addition to any local counsel) for
all indemnified parties and all such fees and expenses shall be reimbursed as
they are incurred.  Such firm shall be designated in writing by a 

                                       17
<PAGE>
 
majority of the Holders, in the case of the parties indemnified pursuant to
Section 8(a), and by the Company and Subsidiary Guarantors, in the case of
parties indemnified pursuant to Section 8(b). The indemnifying party shall
indemnify and hold harmless the indemnified party from and against any and all
losses, claims, damages, liabilities and judgments by reason of any settlement
of any action (i) effected with its prior written consent or (ii) effected
without its prior written consent if the settlement is entered into more than
thirty business days after the indemnifying party shall have received a request
from the indemnified party for reimbursement for the fees and expenses of
counsel (in any case where such fees and expenses are at the expense of the
indemnifying party) and, prior to the date of such settlement, the indemnifying
party shall have failed to comply with such reimbursement request for the fees
and expenses of counsel (unless the reasonableness of such fees and expenses of
counsel is being contested in good faith). No indemnifying party shall, without
the prior written consent of the indemnified party, effect any settlement or
compromise of, or consent to the entry of judgment with respect to, any pending
or threatened action in respect of which the indemnified party is or could have
been a party and indemnity or contribution may be or could have been sought
hereunder by the indemnified party, unless such settlement, compromise or
judgment (i) includes an unconditional release of the indemnified party from all
liability on claims that are or could have been the subject matter of such
action and (ii) does not include a statement as to or an admission of fault,
culpability or a failure to act, by or on behalf of the indemnified party.

    (d) To the extent that the indemnification provided for in this Section 8 is
unavailable to an indemnified party in respect of any losses, claims, damages,
liabilities or judgments referred to therein, then each indemnifying party, in
lieu of indemnifying such indemnified party, shall contribute to the amount paid
or payable by such indemnified party as a result of such losses, claims,
damages, liabilities or judgments (i) in such proportion as is appropriate to
reflect the relative benefits received by the Company and the Subsidiary
Guarantors, on the one hand, and the Holders, on the other hand, from their sale
of Transfer Restricted Securities or (ii) if the allocation provided by clause
8(d)(i) is not permitted by applicable law, in such proportion as is appropriate
to reflect not only the relative benefits referred to in clause 8(d)(i) above
but also the relative fault of the Company and the Subsidiary Guarantors, on the
one hand, and of the Holder, on the other hand, in connection with the
statements or omissions which resulted in such losses, claims, damages,
liabilities or judgments, as well as any other relevant equitable
considerations.  The relative fault of the Company and the Subsidiary
Guarantors, on the one hand, and of the Holder, on the other hand, shall be
determined by reference to, among other things, whether the untrue or alleged
untrue statement of a material fact or the omission or alleged omission to state
a material fact relates to information supplied by the Company or such
Subsidiary Guarantor, on the one hand, or by the Holder, on the other hand, and
the parties' relative intent, knowledge, access to information and opportunity
to correct or prevent such statement or omission.

    The Company, the Subsidiary Guarantors and each Holder agree that it would
not be just and equitable if contribution pursuant to this Section 8(d) were
determined by pro rata allocation (even if the Holders were treated as one
entity for such purpose) or by any other method of allocation which does not
take account of the equitable considerations referred to in the immediately
preceding paragraph.  The amount paid or payable by an indemnified party as a
result 

                                       18
<PAGE>
 
of the losses, claims, damages, liabilities or judgments referred to in the
immediately preceding paragraph shall be deemed to include, subject to the
limitations set forth above, any legal or other expenses reasonably incurred by
such indemnified party in connection with investigating or defending any matter,
including any action that could have given rise to such losses, claims, damages,
liabilities or judgments. Notwithstanding the provisions of this Section 8, no
Holder, its directors, its officers or any Person, if any, who controls such
Holder shall be required to contribute, in the aggregate, any amount in excess
of the amount by which the total received by such Holder with respect to the
sale of Transfer Restricted Securities pursuant to a Registration Statement
exceeds (i) the amount paid by such Holder for such Transfer Restricted
Securities and (ii) the amount of any damages which such Holder has otherwise
been required to pay by reason of such untrue or alleged untrue statement or
omission or alleged omission. No person guilty of fraudulent misrepresentation
(within the meaning of Section 11(f) of the Act) shall be entitled to
contribution from any person who was not guilty of such fraudulent
misrepresentation. The Holders' obligations to contribute pursuant to this
Section 8(c) are several in proportion to the respective principal amount of
Transfer Restricted Securities held by each Holder hereunder and not joint.

SECTION 9.  RULE 144A AND RULE 144

    The Company and each Subsidiary Guarantor agrees with each Holder, for so
long as any Transfer Restricted Securities remain outstanding and during any
period in which the Company or such Subsidiary Guarantor (i) is not subject to
Section 13 or 15(d) of the Exchange Act, to make available, upon request of any
Holder, to such Holder or beneficial owner of Transfer Restricted Securities in
connection with any sale thereof and any prospective purchaser of such Transfer
Restricted Securities designated by such Holder or beneficial owner, the
information required by Rule 144A(d)(4) under the Act in order to permit resales
of such Transfer Restricted Securities pursuant to Rule 144A, and (ii) is
subject to Section 13 or 15 (d) of the Exchange Act, to make all filings
required thereby in a timely manner in order to permit resales of such Transfer
Restricted Securities pursuant to Rule 144.

SECTION 10. MISCELLANEOUS

    (a) Remedies.  The Company and the Subsidiary Guarantors acknowledge and
        --------                                                            
agree that any failure by the Company and/or the Subsidiary Guarantors to comply
with their respective obligations under Sections 3 and 4 hereof may result in
material irreparable injury to the Initial Purchaser or the Holders for which
there is no adequate remedy at law, that it will not be possible to measure
damages for such injuries precisely and that, in the event of any such failure,
the Initial Purchaser or any Holder may obtain such relief as may be required to
specifically enforce the Company's and the Subsidiary Guarantors' obligations
under Sections 3 and 4 hereof.  The Company and the Subsidiary Guarantors
further agree to waive the defense in any action for specific performance that a
remedy at law would be adequate.

    (b) No Inconsistent Agreements.  Neither the Company nor any Subsidiary
        --------------------------                                         
Guarantor will, on or after the date of this Agreement, enter into any agreement
with respect to its securities 

                                       19
<PAGE>
 
that is inconsistent with the rights granted to the Holders in this Agreement or
otherwise conflicts with the provisions hereof. Except as disclosed in the
Offering Memorandum of the Company dated August 14, 1998 with respect to the
Senior Subordinated Notes, neither the Company nor any Subsidiary Guarantor has
previously entered into any agreement granting any registration rights with
respect to its securities to any Person. The rights granted to the Holders
hereunder do not in any way conflict with and are not inconsistent with the
rights granted to the holders of the Company's and the Subsidiary Guarantors'
securities under any agreement in effect on the date hereof.

    (c) Amendments and Waivers.  The provisions of this Agreement may not be
        ----------------------                                              
amended, modified or supplemented, and waivers or consents to or departures from
the provisions hereof may not be given unless (i) in the case of Section 5
hereof and this Section 10(c)(i), the Company has obtained the written consent
of Holders of all outstanding Transfer Restricted Securities and (ii) in the
case of all other provisions hereof, the Company has obtained the written
consent of Holders of a majority of the outstanding principal amount of Transfer
Restricted Securities (excluding Transfer Restricted Securities held by the
Company or its Affiliates).  Notwithstanding the foregoing, a waiver or consent
to departure from the provisions hereof that relates exclusively to the rights
of Holders whose Transfer Restricted Securities are being tendered pursuant to
the Exchange Offer, and that does not affect directly or indirectly the rights
of other Holders whose Transfer Restricted Securities are not being tendered
pursuant to such Exchange Offer, may be given by the Holders of a majority of
the outstanding principal amount of Transfer Restricted Securities subject to
such Exchange Offer.

    (d) Third Party Beneficiary.  The Holders shall be third party beneficiaries
        -----------------------                                                 
to the agreements made hereunder between the Company and the Subsidiary
Guarantors, on the one hand, and the Initial Purchasers, on the other hand, and
shall have the right to enforce such agreements directly to the extent they may
deem such enforcement necessary or advisable to protect its rights or the rights
of Holders hereunder.

    (e) Notices.  All notices and other communications provided for or permitted
        -------                                                                 
hereunder shall be made in writing by hand-delivery, first-class mail
(registered or certified, return receipt requested), telecopier, or air courier
guaranteeing overnight delivery:

        (i)  if to a Holder, at the address set forth on the records of the
     Registrar under the Indenture, with a copy to the Registrar under the
     Indenture; and

        (ii) if to the Company or the Subsidiary Guarantors:

               Great Lakes Dredge & Dock Company

               2122 York Road
               Oak Brook, Illinois 60532
               Telecopier No.: (708) 574-2981
               Attention: Chief Financial Officer

                                       20
<PAGE>
 
               With a copy to:


               Dechert Price & Rhoades
               4000 Bell Atlantic Tower
               171 Arch Street
               Philadelphia, Pennsylvania 19103-2793
               Telecopier No.: (215) 994-2222
               Attention: G. Daniel O'Donnell, Esq.

    All such notices and communications shall be deemed to have been duly given:
at the time delivered by hand, if personally delivered; five Business Days after
being deposited in the mail, postage prepaid, if mailed; when receipt
acknowledged, if telecopied; and on the next business day, if timely delivered
to an air courier guaranteeing overnight delivery.

    Copies of all such notices, demands or other communications shall be
concurrently delivered by the Person giving the same to the Trustee at the
address specified in the Indenture.

    (f) Successors and Assigns.  This Agreement shall inure to the benefit of
        ----------------------                                               
and be binding upon the successors and assigns of each of the parties, including
without limitation and without the need for an express assignment, subsequent
Holders; provided, however, that this Agreement shall not inure to the benefit
of or be binding upon a successor or assign of a Holder unless and to the extent
such successor acquired Transfer Restricted Securities directly from such
Holder, and that nothing herein shall be deemed to permit any assignment,
transfer or other disposition of Transfer Restricted Securities in violation of
the terms hereof or of the Purchase Agreement or the Indenture.  If any
transferee of any Holder shall acquire Transfer Restricted Securities in any
manner, whether by operation of law or otherwise, such Transfer Restricted
Securities shall be held subject to all of the terms of this Agreement, and by
taking and holding such Transfer Restricted Securities such Person shall be
conclusively deemed to have agreed to be bound by and to perform all of the
terms and provisions of this Agreement, including the restrictions on resale set
forth in this Agreement and, if applicable, the Purchase Agreement, and such
Person shall be entitled to receive the benefits hereof.

    (g) Counterparts.  This Agreement may be executed in any number of
        ------------                                                  
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

    (h) Headings.  The headings in this Agreement are for convenience of
        --------                                                        
reference only and shall not limit or otherwise affect the meaning hereof.

    (i) Governing Law.  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
        -------------                                                       
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO THE
CONFLICT OF LAW RULES THEREOF.

                                       21
<PAGE>
 
     (j)   Severability.  In the event that any one or more of the provisions
           ------------
contained herein, or the application thereof in any circumstance, is held
invalid, illegal or unenforceable, the validity, legality and enforceability of
any such provision in every other respect and of the remaining provisions
contained herein shall not be affected or impaired thereby.

     (k)   Entire Agreement. This Agreement is intended by the parties as a
           ----------------
final expression of their agreement and intended to be a complete and exclusive
statement of the agreement and understanding of the parties hereto in respect of
the subject matter contained herein. There are no restrictions, promises,
warranties or undertakings, other than those set forth or referred to herein
with respect to the registration rights granted with respect to the Transfer
Restricted Securities. This Agreement supersedes all prior agreements and
understandings between the parties with respect to such subject matter.

                                       22
<PAGE>
 
    IN WITNESS WHEREOF, the parties have executed this Agreement as of the date
first written above.

                                       GREAT LAKES DREDGE & DOCK CORPORATION 
                                                                             
                                       By: /s/ Douglas B. Mackie                
                                           ---------------------                
                                           Name:                                
                                           Title:                               
                                                                             
                                       GREAT LAKES INTERNATIONAL, INC.       
                                                                             
                                       By: /s/ Douglas B. Mackie                
                                           ---------------------                
                                           Name:                                
                                           Title:                               
                                                                             
                                       GREAT LAKES DREDGE & DOCK COMPANY     
                                                                             
                                       By: /s/ Douglas B. Mackie                
                                           ---------------------                
                                           Name:                                
                                           Title:                               
                                                                             
                                       DAWSON DREDGING COMPANY               
                                                                             
                                       By: /s/ Douglas B. Mackie                
                                           ---------------------                
                                           Name:                                
                                           Title:                               
                                                                             
                                       FIFTY-THREE DREDGING CORPORATION      
                                                                             
                                       By: /s/ Douglas B. Mackie                
                                           ---------------------                
                                           Name:                             
                                           Title:                            
<PAGE>
 
                                       GATES CONSTRUCTION CORP.               
                                                                              
                                       By: /s/ Douglas B. Mackie        
                                           ---------------------        
                                           Name:                        
                                           Title:                        
<PAGE>
 
DONALDSON, LUFKIN & JENRETTE
 SECURITIES CORPORATION

By:/s/ William J.R. Wilson
   -----------------------
   Name: William J.R. Wilson
   Title:  Vice President

<PAGE>
 
                                                                   EXHIBIT 10.01

================================================================================

================================================================================


                                CREDIT AGREEMENT

                          dated as of August 19, 1998

                                     among

                     GREAT LAKES DREDGE & DOCK CORPORATION

                                as the Borrower,
                                --------------- 

                         THE OTHER LOAN PARTIES HERETO,

                                as Loan Parties,
                                --------------- 

           THE FINANCIAL INSTITUTIONS FROM TIME TO TIME PARTY HERETO,

                                as the Lenders,
                                -------------- 

                        BANK OF MONTREAL, CHICAGO BRANCH

                          as the Documentation Agent,

                                      and

            BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIATION,

               as the Issuing Lender and the Administrative Agent
               --------------------------------------------------

                        BANCAMERICA ROBERTSON STEPHENS,

                                as Lead Arranger
                                ----------------


================================================================================

================================================================================
<PAGE>
 
                                    Exhibits
                                    --------


Exhibit A             -   Form of Assignment and Acceptance       
Exhibit B             -   Form of Notice of Borrowing             
Exhibit C             -   Form of Continuation/Conversion Notice  
Exhibit D             -   Form of Letter of Credit Request        
Exhibit E             -   Opinions of Counsel for the Borrower    
Exhibit F             -   Form of Compliance Certificate           
 


                                   Schedules
                                   ---------
 
 
Schedule I            -   Definitions
Schedule II           -   List of Percentages and Applicable Lending Offices
Schedule III          -   Existing L/C's
Schedule IV           -   List of Closing Documents
Schedule 5.1(g)       -   Existing Liens
Schedule 5.1(i)       -   Litigation
Schedule 5.1(k)       -   ERISA Plans
Schedule 5.1(l)       -   Environmental Matters
Schedule 5.1(r)(i)    -   Subsidiaries
Schedule5.1(r)(ii)    -   Ownership of Borrower's Equity
Schedule 5.1(t)       -   Insurance Policies
Schedule 6.2(b)(i)    -   Existing Investments
Schedule 6.2(b)(ii)   -   Certain Venturers or Partners
Schedule 6.2(e)       -   Existing Restrictive Agreements
Schedule 6.2(f)       -   Existing Guaranties
Schedule 6.2(i)       -   Existing Debt
 
<PAGE>
 
                                CREDIT AGREEMENT
                                ----------------

          THIS CREDIT AGREEMENT (including all Schedules and Exhibits hereto,
                                               ---------     --------        
this "Agreement") dated as of August19, 1998, among GREAT LAKES DREDGE & DOCK
      ---------                                                              
CORPORATION, a Delaware corporation (the "Borrower"), the OTHER LOAN PARTIES
                                          --------                          
FROM TIME TO TIME PARTY HERETO, the FINANCIAL INSTITUTIONS FROM TIME TO TIME
PARTY HERETO (the "Lenders"), BANK OF MONTREAL, CHICAGO BRANCH, as the
                   -------                                            
Documentation Agent, and BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIATION
("Bank of America"), as the issuer of Letters of Credit (in such capacity, the
  ---------------                                                             
"Issuing Lender") and as representative for the Lenders (in such representative
- ---------------                                                                
capacity, together with any successor representative appointed pursuant to
                                                                          
Section 8.9, the "Administrative Agent").
- -----------       --------------------   


                                   ARTICLE I


                         DEFINITIONS AND INTERPRETATION
                         ------------------------------

 
          SECTION 1.1.  Defined Terms.  Capitalized terms (whether or not
                        -------------                                    
underscored) used in this Agreement, including its preamble, shall (unless a
clear contrary intention appears) have the respective meanings assigned thereto
in Schedule I.
   ---------- 

          SECTION 1.2.  Use of Defined Terms.  Unless otherwise defined or the
                        --------------------                                  
context otherwise requires, terms for which meanings are provided in this
Agreement shall have such meanings when used in the Schedules and each Notice of
Borrowing, Continuation/Conversion Notice, Compliance Certificate, Assignment
and Acceptance, notice and other communication delivered from time to time in
connection with this Agreement or any other Loan Document.

          SECTION 1.3.  Interpretation.  In this Agreement and each other Loan
                        --------------                                        
Document, unless a clear contrary intention appears:

          (a)    the singular number includes the plural number and vice versa;
                                                                    ---- ----- 

          (b)    reference to any Person includes such Person's successors and
     assigns but, if applicable, only if such successors and assigns are
     permitted by this Agreement, and reference to a Person in a particular
     capacity excludes such Person in any other capacity or individually;

          (c)    reference to any gender includes each other gender;

          (d)    reference to any agreement (including this Agreement and the
                                                                          
     Schedules and Exhibits hereto), document or instrument means such
     ---------     --------                                           
     agreement, document or instrument as amended, restated, supplemented or
     modified and in effect from time to time in accordance with the terms
     thereof and, if applicable, the terms hereof and reference to any
     promissory note includes any promissory note which is an extension or
     renewal thereof or a substitute or replacement therefor;
<PAGE>
 
          (e)    reference to any Applicable Law means such Applicable Law as
     amended, modified, codified or reenacted, in whole or in part, and in
     effect from time to time, including rules and regulations promulgated
     thereunder;

          (f)    unless the context indicates otherwise, reference to the 
     preamble or any Article, Section, Schedule or Exhibit means the preamble 
     --------        -------  -------  --------    -------           -------- 
     hereto or such Article or Section hereof or Schedule or Exhibit hereto;
                    -------    -------           --------    -------        

          (g)    "hereunder," "hereof," "hereto" and words of similar import
     shall be deemed references to this Agreement as a whole and not to any
     particular Article, Section or other provision hereof;
                -------  -------                           

          (h)    "including" (and with correlative meaning "include") means
     including without limiting the generality of any description preceding such
     term; and

          (i)    relative to the determination of any period of time, "from"
     means "from and including", "to" means "to but excluding", and "through"
     means "to and including."

          SECTION 1.4.  Accounting Terms.  All accounting terms not specifically
                        ----------------                                        
defined herein shall be construed in accordance with GAAP.  Except as otherwise
provided herein, if any changes in accounting principles from those used in the
preparation of the most recent financial statements referred to in Section
                                                                   -------
5.1(f) are hereafter required or permitted by the rules, regulations,
- ------                                                               
pronouncements and opinions of the Financial Accounting Standards Board of the
American Institute of Certified Public Accountants (or successors thereto or
agencies with similar functions) and are adopted by the Borrower with the
agreement of its independent certified public accountants and such changes
result in a change in the method of calculation of any of the financial
covenants, standards or terms found in Section 6.3 or in the related definitions
                                       -----------                              
of terms used therein, the parties hereto agree to enter into negotiations in
order to amend such provisions so as to reflect equitably such changes with the
desired result that the criteria for evaluating the Borrower's financial
condition shall be the same after such changes as if such changes had not been
made, provided that no change in GAAP that would affect the method of
      --------                                                       
calculation of any of the financial covenants, standards or terms shall be given
effect in such calculations until such provisions are amended, in a manner
satisfactory to the Majority Lenders, so as to reflect such change in accounting
principles.


                                   ARTICLE II


                         AMOUNT AND TERM OF COMMITMENTS
                         ------------------------------

 
          SECTION 2.1.  Commitments.   The Lenders shall make Loans to or for
                        -----------                                          
the benefit of the Borrowers in accordance with their respective Commitments as
provided below in this Section 2.1.
                       ----------- 

          SECTION 2.1.1.  Revolving Commitment.  On the terms and subject to the
                          --------------------                                  
conditions of this Agreement (including Article IV), each Lender severally and
                                        ----------                            
for itself alone 

                                      -2-
<PAGE>
 
agrees to make Revolving Loans to, and to issue or participate in the issuance
of Letters of Credit for the account of, the Borrower pursuant to its Revolving
Commitment, as described in this Article II and in Article III, respectively.  
                                 ----------        ----------- 
From time to time on any Business Day occurring prior to the Revolving
Commitment Termination Date, each Lender, severally and for itself alone, agrees
to make revolving loans in Dollars (relative to such Lender, its "Revolving
                                                                  ---------
Loans") to the Borrower equal to such Lender's Percentage of the aggregate 
- -----
amount of the applicable Borrowing requested by the Borrower to be made on such
day pursuant to this section. The commitment of each Lender described in this
Section 2.1.1 is herein referred to as its "Revolving Commitment" and shall be
- -------------                               --------------------
in the amount set forth below such Lender's name in Schedule II hereof as such
                                                    -----------
Lender's "Revolving Commitment"; provided that (a) the aggregate principal 
                                 --------         
amount of all Revolving Loans which any Lender shall be committed to have
outstanding hereunder shall not at any time exceed the product of (i) such
Lender's Percentage multiplied by (ii) the Availability and (b) the aggregate
principal amount of all Revolving Loans which the Lenders shall be committed to
have outstanding hereunder shall not at any time exceed the Availability. On the
terms and subject to the conditions hereof, the Borrower may from time to time
borrow, prepay and reborrow Revolving Loans.

          SECTION 2.1.2.  Term Commitment.   On the terms and subject to the
                          ---------------                                   
conditions of this Agreement (including Article IV), each Lender severally and
                                        ----------                            
for itself alone agrees to make a single Term Loan on the Closing Date to the
Borrower pursuant to, and in an aggregate principal amount equal to, its Term
Commitment.  The commitment of each Lender described in this Section 2.1.2 is
                                                             -------------   
herein referred to as its "Term Commitment" and shall be in the amount set forth
                           ---------------                                      
below such Lender's name in Schedule II hereof as such Lender's "Term
                            -----------                              
Commitment."

          SECTION 2.2.  Reduction of Revolving Commitment Amount.  The Revolving
                        ----------------------------------------                
Commitment Amount is subject to reduction from time to time pursuant to this
Section 2.2.
- ----------- 

          SECTION 2.2.1.  Optional.  The Borrower may, from time to time on any
                          --------                                             
Business Day, voluntarily reduce the amount of the Revolving Commitment Amount
by paying to the Administrative Agent for the account of the Lenders such amount
as may be necessary, if any, to reduce the outstanding principal balance of the
Revolving Loans plus the then Letter of Credit Obligations to such reduced
                ----                                                      
Revolving Commitment Amount; provided that all such reductions shall require at
                             --------                                          
least two (2) Business Day's prior written notice to the Administrative Agent
and be permanent and that any partial reduction of the Revolving Commitment
Amount shall be in a minimum amount of $1,000,000 and in an integral multiple of
$500,000 in excess thereof.

          SECTION 2.2.2.  Mandatory.  As of the date any prepayment is made
                          ---------                                        
pursuant to Sections 2.8.1(c) or 2.8.1(d) and to the extent, if any, applied to
            -----------------    --------                                      
the repayment of outstanding Revolving Loans (or cash collateralization of
Letter of Credit Obligations) pursuant to Section 2.8.2, the Revolving
                                          -------------   
Commitment Amount shall be automatically and temporarily reduced by an amount
equal to the portion, if any, of prepayment so applied, and, thereafter, shall
be automatically and permanently increased by the amount of such temporary
reduction if and when, within twelve (12) months following such temporary
reduction, the Borrower provides, or

                                      -3-
<PAGE>
 
causes one or more of its Subsidiaries to provide, Collateral (or substitute
Collateral) of equal or greater value to that of the property subject to the
disposition or casualty giving rise to such temporary reduction, such Collateral
(or substitute Collateral) is otherwise reasonably acceptable to the
Administrative Agent and subject to documentation reasonably satisfactory to the
Administrative Agent (provided that such documentation shall be satisfactory if
substantially similar to the applicable Collateral Documents executed and
delivered on the Closing Date) and, at the time such Collateral (or substitute
Collateral) is provided, no Event of Default has occurred and is continuing. If
the Borrower fails to provide or cause its Subsidiaries to provide such
Collateral (or substitute Collateral) and documentation within such twelve (12)
month period or if, upon this expiration of such period, an Event of Default has
occurred and is continuing, such temporary reduction to the Commitment Amount
shall thereupon become a permanent reduction.

          SECTION 2.3.  Various Types of Loans.  Each Loan shall be either a
                        ----------------------                              
Base Rate Loan or a Eurodollar Rate Loan (each a "type" of Loan), as the
                                                  ----                  
Borrower shall specify in the related notice of Borrowing or
Continuation/Conversion Notice pursuant to Section 2.4 or 2.6; provided,
                                           -----------    ---  -------- 
however, that the Borrower may not request or have outstanding Eurodollar Rate
- -------                                                                       
Loans having more than ten (10) different Interest Periods.

          SECTION 2.4.  Borrowing Procedures.  (a)  The Borrower shall give
                        --------------------                               
notice to the Administrative Agent of each proposed Borrowing not later than (i)
in the case of a Borrowing of Base Rate Loans, 11:00 A.M. (Chicago time) on the
proposed date of such Borrowing and (ii) in the case of a Borrowing of
Eurodollar Rate Loans, 11:00 A.M. (Chicago time) at least two (2) Business Days
prior to the proposed date of such Borrowing.  Each such notice (a "Notice of
                                                                    ---------
Borrowing") shall be requested by telephone with same day written confirmation
- ---------                                                                     
by facsimile transmission, substantially in the form of Exhibit B hereto,
                                                        ---------        
specifying therein the date, the amount and type of such Borrowing and, in the
case of a Borrowing of Eurodollar Rate Loans and the initial Interest Period
therefor.  Each Borrowing shall be in Dollars.  All Loans requested on the
Closing Date shall be Base Rate Loans.  Promptly following receipt of any such
notice, the Administrative Agent shall advise each Lender thereof.

 
          (b)    Each Lender shall, before 2:00 P.M. (Chicago time) on the date
     of each proposed Borrowing, make available for the account of its
     Applicable Lending Office at the principal office of the Administrative
     Agent in same day funds such Lender's Percentage of such Borrowing. Subject
     to Section 2.4(f), after the Administrative Agent's receipt of such funds
        --------------  
     and upon fulfillment of the applicable conditions set forth in Article IV,
                                                                    ----------
     the Administrative Agent will make such funds available to the Borrower to
     such account as the Borrower shall designate from time to time.

          (c)    Any Lender which does not make funds available at the
     applicable time specified under this Section 2.4 shall pay to the
                                          -----------
     Administrative Agent on demand interest thereon at the Federal Funds Rate
     for the number of days from the date of the applicable Borrowing to the
     date on which such amount becomes immediately available to the
     Administrative Agent, together with such other compensatory amounts as may
     be required to be paid by such Lender to the Administrative Agent pursuant
     to the Rules for Interbank Compensation of the Council on International
     Banking or the Clearinghouse 

                                     -4-
<PAGE>
 
     Compensation Committee, as the case may be, as in effect from time to time.
     A statement of the Administrative Agent submitted to any Lender with
     respect to any amounts owing under this Section 2.4 shall be conclusive in
                                             ----------- 
     the absence of manifest error. If such amount is not in fact made available
     to the Administrative Agent by such Lender on the same Business Day as the
     date of such Borrowing, the Administrative Agent shall be entitled to
     recover such amount from the Borrower, with interest thereon at the rate
     then applicable to the Loans comprising such Borrowing, on demand, provided
     that such payment by the Borrower shall in no way limit or restrict its
     ability to hold such Lender liable for its failure to so fund.

          (d)    Each Borrowing consisting of Eurodollar Rate Loans or Base Rate
     Loan, shall be in an aggregate amount not less than $1,000,000, or an
     integral multiple of $500,000 in excess thereof.

          (e)    Each Notice of Borrowing (whether in writing or by telephone)
     shall be irrevocable and binding on the Borrower.  The Borrower shall
     provide the Administrative Agent with documents reasonably satisfactory to
     the Administrative Agent indicating the names of those employees of the
     Borrower authorized by the Borrower to make telephonic requests for Loans
     and continuations and conversions thereof, and the Administrative Agent
     shall be entitled to rely upon such documentation until notified in writing
     by the Borrower of any change(s) in the names of the employees so
     authorized.  The Administrative Agent shall be entitled to act on the
     instructions of anyone identifying himself as one of the persons authorized
     to request Loans and continuations and conversions thereof by telephone and
     the Borrower shall be bound thereby in the same manner as if the Person
     were actually so authorized.  The Borrower agrees to indemnify and hold the
     Administrative Agent and each Lender harmless from any and all claims,
     damages, liabilities, losses, costs and expenses (including Attorney Costs)
     which may arise or be created by the acceptance of instructions for making,
     continuing or converting any Loans by telephone.  In the case of any
     request for a Borrowing of Eurodollar Rate Loans, the Borrower shall
     indemnify each Lender against any loss, cost or expense incurred by such
     Lender as a result of any failure (i) to fulfill on or before the date
     specified in such Notice of Borrowing for such Borrowing the applicable
     conditions set forth in Article IV or (ii) to otherwise make the Borrowing
                             ----------                                        
     in accordance with such Notice of Borrowing, including any loss (including
     loss of anticipated profits), cost or expense incurred by reason of the
     liquidation or reemployment of deposits or other funds acquired by such
     Lender to fund the Loan to be made by such Lender as part of such Borrowing
     when such Loan, as a result of such failure, is not made on such date.

          (f)    Unless the Administrative Agent shall have received notice from
     a Lender prior to the date of any Borrowing that such Lender will not make
     available to the Administrative Agent such Lender's Percentage of such
     Borrowing, the Administrative Agent may assume that such Lender has made
     such Percentage available to the Administrative Agent on the date of such
     Borrowing in accordance with Section 2.4(b) and the Administrative Agent
                                  --------------                             
     may, in reliance upon such assumption, make available to the Borrower on
     such date a corresponding amount.  If and to the extent that such Lender

                                      -5-
<PAGE>
 
     shall not have made such Percentage available to the Administrative Agent,
     such Lender and the Borrower severally agree to repay to the Administrative
     Agent forthwith on demand such corresponding amount together with interest
     thereon, for each day from the date such amount is made available to the
     Borrower until the date such amount is repaid to the Administrative Agent,
     at (i) in the case of the Borrower, the interest rate applicable at the
     time to Loans comprising such Borrowing and (ii) in the case of such
     Lender, the Federal Funds Rate.  If such Lender shall repay to the
     Administrative Agent such corresponding amount, such amount so repaid shall
     constitute such Lender's Loans as part of such Borrowing for purposes of
     this Agreement.

          (g)    The failure of any Lender to make the Loans to be made by it as
     part of any Borrowing shall not relieve any other Lender of its obligation,
     if any, hereunder to make its Loan on the date of such Borrowing, but no
     Lender shall be responsible for the failure of any other Lender to make the
     Loan to be made by such other Lender on the date of any Borrowing.

          SECTION 2.5.  Evidence of Loans. The Loans made by each Lender
                        ------------------
shall be evidenced by the Notes payable to such Lender. All Loans and payments
hereunder shall be recorded on the books of the Lender making such Loan or
receiving such payment, which shall be rebuttably presumptive evidence of the
amount of such Loans outstanding at any time hereunder. Notwithstanding any term
or condition of this Agreement to the contrary, however, the failure of any
Lender to record the date and amount of any Loan made by such Lender hereunder
or error in so recording shall not limit or otherwise affect the obligations of
the Borrower to repay any such Loan and interest thereon; provided that if there
                                                          --------
is an error in so recording there shall be a rebuttable presumption that the
records of the Administrative Agent are true and correct as to the amount of the
Loan.

          SECTION 2.6.  Continuation/Conversion Procedures.  Subject to
                        ----------------------------------  
Sections 2.3 and 2.4, the Borrower may convert any outstanding Loans of one type
- ------------     ---
into Loans of another type or continue any outstanding Eurodollar Rate Loan as a
Eurodollar Rate Loan, in each case by giving notice thereof to the
Administrative Agent not later than 11:00 A.M. (Chicago time), (a) in the case
of a conversion of a Eurodollar Rate Loan into a Base Rate Loan, on or before
the proposed date of such conversion and (b) in the case of a continuation of a
Eurodollar Rate Loan as, or a conversion of a Base Rate Loan into, a Eurodollar
Rate Loan, at least two (2) Business Days prior to the proposed date of such
continuation or conversion; provided, that Eurodollar Rate Loans may be
                            --------  ----
continued or converted only as of the last day of the Interest Period applicable
thereto (unless all payments which are due, if any, under Section 2.11 are made
                                                          ------------
in connection with such continuation or conversion). Each such notice (a
"Continuation/Conversion Notice") shall be by telephone with same day written
 ------------------------------
confirmation by facsimile transmission substantially in the form of Exhibit C,
                                                                    --------- 
specifying therein the date and amount of such continuation or conversion, the
type of the Loan to be so converted or continued, and, in the case of a
continuation of or conversion into a Eurodollar Rate Loan, the new Interest
Period therefor. Promptly upon receipt of such notice (which shall be effective
upon receipt by the Administrative Agent), the Administrative Agent shall advise
each Lender thereof. Subject to Sections 2.18 and 2.19, such Loan shall be so
                                -------------     ----
converted or continued on the requested date of conversion or continuation;

                                      -6-
<PAGE>
 
provided that each conversion or continuation shall be on a Business Day and,
- --------
after giving effect to any such conversion or continuation, the aggregate
principal amount of each outstanding Eurodollar Rate Loan shall be at least
$1,000,000 and an integral multiple of $500,000. Each Eurodollar Rate Loan shall
automatically convert to a Base Rate Loan at the end of the Interest Period
applicable thereto, unless (i) in the case of an expiring Eurodollar Rate Loan,
the Borrower shall have delivered to the Administrative Agent a
Continuation/Conversion Notice not less than two (2) nor more than ten (10)
Business Days prior to the last day of the Interest Period applicable thereto
and (ii) all of the other conditions contained in this Section 2.6 are
                                                       -----------
satisfied.

          SECTION 2.7.  Pro Rata Treatment.  All Borrowings, continuations, 
                        ------------------
conversions, prepayments, repayments and mandatory and voluntary Revolving
Commitment Amount reductions shall be effected so that after giving effect
thereto each Lender will have a ratable share (according to its Percentage) of
all Loans and Letters of Credit and of the Revolving Commitment Amount.

          SECTION 2.8.  Principal Payments.  Repayments and prepayments of
                        ------------------
principal of the Loans shall be made in accordance with this Section 2.8.
                                                             -----------

          SECTION 2.8.1.  Repayments and Prepayments.  The Borrower will make
                          --------------------------                         
payment in full in Dollars of all unpaid principal of all Revolving Loans and
all other principal Obligations which are then outstanding (other than the
outstanding principal balance of the Term Loans) on the Revolving Commitment
Termination Date.  The Borrower will repay, in Dollars, the aggregate
outstanding principal balance of the Term Loans in twenty-two (22) consecutive
quarterly installments on each September 30, December 31, March 31 and June 30,
commencing on September 30, 1999 and continuing through and including December
31, 2004, in the amounts set forth below:


                                                     
                  Installment Date                     Installment Amount
                  ----------------                     ------------------

     Each of September 30, 1999
      December 31, 1999, March 31, 2000
      and June 30, 2000                                $1,250,000

     Each of September 30, 2000
      December 31, 2000, March 31, 2001
      and June 30, 2001                                $2,000,000

     Each of September 30, 2001
      December 31, 2001, March 31, 2002
      and June 30, 2002                                $2,500,000

     Each of September 30, 2002
      December 31, 2002, March 31, 2003
      and June 30, 2003                                $3,000,000

                                      -7-
<PAGE>
 
     Each of September 30, 2003
      December 31, 2003, March 31, 2004
      and June 30, 2004                                $3,000,000

     Each of September 30, 2004
      December 31, 2004                                $4,000,000.


Without limiting the foregoing, and in addition thereto, the Borrower:

          (a)    may, from time to time on any Business Day, make a voluntary
     prepayment, in whole or in part, of the outstanding principal amount of any
     Loans; provided that:
            --------      

                 (i)    any such prepayment of a Eurodollar Rate Loan prior to
          the last day of the Interest Period for such Loan shall be subject to
          Section 2.11,
          ------------ 

                 (ii)   no such prepayment of a Eurodollar Rate Loan may be made
          which, after giving effect thereto, would result in the aggregate
          outstanding principal amount of any remaining Eurodollar Loans to be
          equal to an amount other than $1,000,000 or an integral multiple of
          $500,000 in excess thereof,

                 (iii)  each such voluntary prepayment shall require written
          notice by 11:00 A.M. (Chicago time) on such Business Day but no more
          than five (5) Business Days prior to such prepayment, and

                 (iv)   each such voluntary prepayment shall be in a minimum
          amount of $1,000,000 and an integral multiple of $500,000 in excess
          thereof (or, if less, the aggregate principal amount of all Loans
          outstanding);

          (b)    shall, on or before the ninetieth (90th) day following the end
     of each Fiscal Year, commencing with the Fiscal Year ending December 31,
     1999, with respect to which the Total Leverage Ratio for the four Fiscal
     Quarter period ending as of the last day of such Fiscal Year equals or
     exceeds 3.00 to 1.00, make a mandatory prepayment of the Loans in an amount
     equal to fifty percent (50%) of Excess Cash Flow with respect to such
     Fiscal Year;

          (c)    shall, on each date when the Administrative Agent receives
     proceeds of Collateral from the Lender First Proceeds Account, or otherwise
     pursuant to Section 3.3(a) of the Intercreditor Agreement, be deemed to
     have made, and the Borrower shall cause to be made, a mandatory prepayment
     of the Loans in an amount equal to such proceeds;

          (d)    shall, upon the consummation of any sale, transfer, lease,
     contribution, conveyance or other disposition of any property of the
     Borrower or any of its Subsidiaries 

                                      -8-
<PAGE>
 
     (excluding (i) sales, transfers, leases, contributions, conveyances and
     other distributions permitted under Section 6.2(g) and (ii) Permitted
                                         --------------
     Dispositions, but including Permitted Dispositions to the extent a
     prepayment is required pursuant to the clause (c)(iv)(B) of the definition
                                            -----------------
     of such term), make a mandatory prepayment of the Loans in an amount equal
     to the Net Cash Proceeds with respect to such transaction;

          (e)    shall, upon the consummation of any issuance, incurrence or
     sale of any Debt by the Borrower or any of its Subsidiaries (other than
     Debt of the type described in Section 6.2(i)), make a mandatory prepayment
                                   --------------
     of the Loans in an amount equal to the Net Cash Proceeds with respect to
     such transaction;

          (f)    shall, upon the consummation of any issuance or sale of any
     capital stock, warrants, options, stock appreciation rights, partnership
     interests, limited liability company units or other similar equity
     interests by the Borrower, or any of its Subsidiaries, or any Person which
     owns, directly or indirectly, all of the outstanding Voting Stock of the
     Borrower (other than sales and issuances to officers and directors of the
     Borrower), make a mandatory prepayment of the Loans in an amount equal to
     fifty percent (50%) of the Net Cash Proceeds with respect to such
     transaction (except to the extent such Net Cash Proceeds are applied to the
     repayment of Note Indenture Obligations in accordance with clause (iii) of
                                                                ------------   
     Section 6.2(c));
     --------------  

          (g)    shall, from time to time, make mandatory prepayments of the
     Revolving Loans in such amounts and at such times as may be necessary to
     (i) prevent the aggregate outstanding principal amount of all Revolving
     Loans from exceeding Availability and (ii) to the extent achievable through
     the prepayment of Revolving Loans, prevent the aggregate outstanding Letter
     of Credit Obligations from exceeding the Letter of Credit Availability; and

          (h)    shall, immediately upon any acceleration of the maturity of any
     Loans pursuant to Section 7.2, repay all Loans.
                       -----------                  

Each repayment and prepayment of any Loans made pursuant to this Section 2.8.1
                                                                 -------------
shall be without premium or penalty, except as may be required by Section 2.11,
                                                                  ------------ 
and shall be applied in accordance with Section 2.8.2.  No mandatory or
                                        -------------                  
voluntary prepayment of principal of the Loans shall cause a reduction in the
Revolving Commitment Amount, except as provided in Section 2.2.
                                                   ----------- 

          SECTION 2.8.2.  Application.  In the case of all voluntary and
                          -----------                                   
mandatory prepayments paid pursuant to the provisions of clauses (a) through (f)
                                                         -----------         ---
of Section 2.8.1 (except voluntary repayments of Revolving Loans made other than
   -------------                                                                
in conjunction with a mandatory reduction to the Revolving Commitment pursuant
to Section 2.2.2), (a) fifty percent (50%) of the amount of each such prepayment
   -------------                                                                
shall be applied first to then remaining unpaid Term Loan principal installments
next scheduled to become due and payable in accordance with Section 2.8.1 and,
                                                            -------------     
then, after the Term Loans have been paid in full, to the outstanding principal
balance of the Revolving Loans (and if no Revolving Loans are then outstanding,
to the cash collateralization of Letter of Credit Obligations pursuant to a cash
collateral security agreement in form and 

                                      -9-
<PAGE>
 
substance reasonably acceptable to the Administrative Agent) and (b) the
remaining fifty percent (50%) of the amount of each such prepayment shall be
applied first to the outstanding principal balance of the Term Loans ratably
among the then remaining unpaid scheduled installments thereof described in
Section 2.8.1 and, then, after the Term Loans have been paid in full, to the 
- -------------                                          
outstanding principal balance of the Revolving Loans (and if no Revolving Loans
are then outstanding, to the cash collateralization of Letter of Credit
Obligations pursuant to a cash collateral security agreement in form and
substance reasonably acceptable to the Administrative Agent).

          SECTION 2.9.  Interest Payments.  Interest on all Loans shall accrue
                        -----------------                                     
and be payable in accordance with this Section 2.9.
                                       ----------- 

          SECTION 2.9.1.  Rates.  From the date any Loan is made to the date the
                          -----                                                 
principal amount of such Loan is repaid in full, interest shall accrue on the
outstanding principal amount of such Loan at a rate per annum:
                                                    --- ----- 

          (a)    on that portion of the outstanding principal amount thereof
     maintained from time to time as a Base Rate Loan, equal to the Base Rate
     from time to time in effect, plus the then Applicable Base Rate Margin; and
                                  ----                                          

          (b)    on that portion of the outstanding principal amount thereof
     maintained from time to time as a Eurodollar Rate Loan, during each
     Interest Period applicable thereto, equal to the sum of the Eurodollar Rate
     (Adjusted) for such Interest Period, plus the then Applicable Eurodollar
                                          ----                               
     Rate Margin.

          SECTION 2.9.2.  Default Rate.  Notwithstanding the provisions of
                          ------------                                    
Section 2.9.1, after the occurrence of any Default or Event of Default, at the
- -------------                                                                 
election of the Majority Lenders, until the time when such Event of Default
shall have been cured or waived or the principal of and interest on all Loans
and all other monetary Obligations arising under this Agreement or any other
Loan Document shall have been paid in full, the Borrower shall pay interest
(after as well as before judgment) on the principal amount of all Loans and, to
the fullest extent permitted by applicable law, on such other Obligations,
respectively, at a rate per annum (the "Default Rate") equal to the sum of the
                        --- -----       ------------                          
Base Rate from time to time in effect, plus the then Applicable Base Rate
                                       ----                              
Margin, plus 2.0%.
        ----      

          SECTION 2.9.3.  Payment Dates.  Interest accrued on each Loan shall be
                          -------------                                         
payable, without duplication:

          (a)    with respect to any Revolving Loans, on the Revolving
     Commitment Termination Date;

          (b)    with respect to any portion of any Loan prepaid pursuant to
                                                                         
     Section 2.8.1, (i) in the case of Base Rate Loans, on the last day of the
     -------------                                                            
     next Fiscal Quarter ending after such prepayment, but only with respect to
     interest accrued on such Loan through the date 

                                     -10-
<PAGE>
 
of prepayment, and (ii) in the case of Eurodollar Rate Loans, on the date of
such prepayment;

          (c)    in the case of any Loan:

                 (i)    on that portion of the outstanding principal amount
          thereof maintained as a Base Rate Loan, on the last day of each Fiscal
          Quarter, commencing with the first such day following the Closing
          Date;

                 (ii)   on that portion of the outstanding principal amount
          thereof maintained as a Eurodollar Rate Loan, on the last day of each
          applicable Interest Period and, if such Interest Period shall exceed
          three months, on each day that occurs during such Interest Period
          every three months from the first day of such Interest Period (or, if
          there is no numerically corresponding day in such subsequent month or
          if such numerically corresponding day is not a Business Day, on the
          next preceding Business Day); and

          (d)    on that portion of any Loans the maturity of which is
     accelerated pursuant to Section 7.2, immediately upon such acceleration.
                             -----------                                     

Interest accrued on the principal amount of each Loan or other monetary
Obligation arising under this Agreement or any other Loan Document after the
date such amount is due and payable (whether on the Revolving Commitment
Termination Date, upon acceleration or otherwise) shall be payable upon demand.

          SECTION 2.9.4.  Rate Determinations.
                          ------------------- 

          (a)    All determinations by the Administrative Agent of any rate of
     interest applicable to any Loan or other monetary Obligation shall be
     conclusive in the absence of manifest error.

          (b)    If the Administrative Agent shall have determined that for any
     reason adequate and reasonable means do not exist for ascertaining the IBO
     Rate for any requested Interest Period with respect to a proposed
     Eurodollar Rate Loan or that the IBO Rate applicable pursuant to Section
                                                                      -------
     2.9.1 for any requested Interest Period with respect to a proposed
     -----                                                             
     Eurodollar Rate Loan does not adequately and fairly reflect the cost to the
     Lenders of funding such Loan, the Administrative Agent will forthwith give
     notice of such determination to the Borrower and each Lender.  Thereafter,
     the obligation of the Lenders to make or continue Eurodollar Rate Loans
     hereunder, or permit the conversion of Base Rate Loans into Eurodollar Rate
     Loans, shall be suspended until the Administrative Agent revokes such
     notice in writing.  Upon receipt of such notice, the Borrower may revoke
     any Notice of Borrowing or Continuation/Conversion Notice then submitted by
     it.  If the Borrower does not revoke such notice, the Lenders shall make,
     convert or continue the Loans, as originally proposed by the Borrower, in
     the amount 

                                     -11-
<PAGE>
 
     specified in the applicable notice submitted by the Borrower, but such
     Loans shall be made, converted or continued as Base Rate Loans.

          (c)    On the date on which the aggregate unpaid principal amount of
     Loans shall be reduced, by payment or prepayment or otherwise, to less than
     $1,000,000, such Loans shall, if they are Eurodollar Rate Loans,
     automatically convert into Base Rate Loans, and on and after such date the
     right of the Borrower to convert Base Rate Loans into Eurodollar Rate Loans
     shall terminate.  The Borrower shall be obligated to reimburse the Lenders
     for costs incurred in connection with such automatic conversion in
     accordance with Section 2.11.
                     ------------ 

          SECTION 2.10.  Increased Costs and Reduction of Returns.
                         ---------------------------------------- 

          (a)    If the Issuing Lender or any Lender shall determine that, due
     to either (i) the introduction of or any change (other than any change by
     way of imposition of or increase in reserve requirements included in the
     calculation of the IBO Rate) in or in the interpretation of any law or
     regulation occurring after the Closing Date or (ii) the compliance with any
     guideline or request issued after the Closing Date from any central bank or
     other Governmental Authority (whether or not having the force of law),
     there shall be any increase in the cost to (including a reduction in the
     sum receivable by) the Issuing Lender or such Lender of agreeing to make or
     making, funding, continuing or maintaining any of its Loans as, or
     converting (or its obligation to convert) any portion of the principal
     amount of any of its Loans into, Eurodollar Rate Loans, or issuing,
     maintaining or participating in any Letter of Credit, then the Borrower
     shall be liable for, and shall from time to time, within fifteen (15) days
     after written demand therefor by the Administrative Agent on behalf of such
     Issuing Lender or such Lender (which demand the Administrative Agent hereby
     agrees to deliver), immediately pay to the Administrative Agent for the
     account of the Issuing Lender or such Lender, from time to time as
     specified by the Issuing Lender or such Lender, additional amounts as are
     sufficient to compensate the Issuing Lender or such Lender for such
     increased cost (including such reduced amount). A certificate as to such
     amounts, showing a calculation of such amounts in reasonable detail,
     submitted to the Borrower and the Administrative Agent by the Issuing
     Lender or such Lender, shall be conclusive and binding for all purposes,
     absent manifest error.

          (b)    If the Issuing Lender or any Lender shall have determined that
     (i) the introduction after the Closing Date of any Capital Adequacy
     Regulation, (ii) any change after the Closing Date in any Capital Adequacy
     Regulation, (iii) any change after the Closing Date in the interpretation
     or administration of any Capital Adequacy Regulation by any central bank or
     other Governmental Authority charged with the interpretation or
     administration thereof, or (iv) compliance by the Issuing Lender or such
     Lender (or its Applicable Lending Office) or any corporation controlling
     the Issuing Lender or such Lender, with any Capital Adequacy Regulation
     issued after the Closing Date, in any such case affects or would affect the
     amount of capital required or expected to be maintained by the Issuing
     Lender or

                                     -12-
<PAGE>
 
     such Lender or any corporation controlling the Issuing Lender or such
     Lender and (taking into consideration the Issuing Lender's or such Lender's
     or such corporation's policies with respect to capital adequacy and the
     Issuing Lender's or such Lender's desired return on capital) determines
     that the amount of such capital is increased as a consequence of its
     commitment to issue, its issuance of or participation in any Letter of
     Credit or its Commitments, Loans, credits or obligations under this
     Agreement, then, within fifteen (15) days after written demand therefor by
     the Administrative Agent on behalf of the Issuing Lender or such Lender
     (which demand the Administrative Agent hereby agrees to deliver), the
     Borrower shall pay to the Administrative Agent for the account of the
     Issuing Lender or such Lender, from time to time as specified by the
     Issuing Lender or such Lender, additional amounts as are sufficient to
     compensate the Issuing Lender or such Lender or such corporation for such
     increase. A certificate as to such amounts, showing a calculation of such
     amounts in reasonable detail, submitted to the Borrower and the
     Administrative Agent by the Issuing Lender or such Lender shall be
     conclusive and binding for all purposes, absent manifest error.

          (c) Without limiting the generality of clauses (a) and (b) of this
                                                 ------- ---     ---        
     Section 2.10, in the event that the Issuing Lender, in compliance with any
     ------------                                                              
     guideline or request from any central bank or other Governmental Authority
     (whether or not having the force of law) or any Capital Adequacy Regulation
     issued after the Closing Date, or as a result of any change after the
     Closing Date in the interpretation or administration of any such guideline
     or Capital Adequacy Regulation by any central bank or Governmental
     Authority charged with the interpretation or administration thereof,
     determines that a Performance Letter of Credit should have been
     characterized at the time of issuance thereof or should be recharacterized
     as a Financial Letter of Credit, then the Borrower shall be liable for, and
     shall from time to time, upon demand therefor by the Issuing Lender (with a
     copy to the Administrative Agent), within fifteen (15) days after written
     demand therefor by the Administrative Agent on behalf of the Issuing Banks
     (which demand the Administrative Agent hereby agrees to deliver), pay to
     the Administrative Agent, for the account of the Issuing Lender, from time
     to time as specified by the Issuing Lender, such additional amounts as are
     sufficient to cause the Issuing Lender to receive Letter of Credit Fees
     under Section 3.3(a) with respect to such Letter of Credit Fee Percentage
           --------------                                                     
     from the date of issuance or recharacterization, as the case may be.  A
     certificate as to such amounts, showing a calculation of such amounts in
     reasonable detail, submitted to the Borrower and the Administrative Agent
     by the Issuing Lender, shall be conclusive and binding for all purposes,
     absent manifest error.

          (d) The Issuing Lender and each Lender agree to notify the Borrower
     and the Administrative Agent in writing promptly of any circumstances that
     would cause the Borrower to pay additional amounts pursuant to this Section
                                                                         -------
     2.10, provided that the failure to give such notice shall not affect the
     ----  --------                                                          
     Borrower's obligation to pay such additional amounts hereunder.
     Notwithstanding anything to the contrary in this Section 2.10, the Borrower
                                                      ------------              
     shall have no obligation to pay any additional amounts under clause (a),
                                                                  ---------- 
     (b) or (c) of this Section 2.10 unless the claiming Issuing Lender or
     ---    ---         ------------                                      
     Lender shall have made demand upon the Borrower for such additional amounts
     within six (6) months after the claiming Issuing Lender or Lender obtained
     knowledge of the circumstances that would 

                                     -13-
<PAGE>
 
     cause the Borrower to pay such additional amounts; provided, however, that
                                                        --------  -------
     the foregoing limitation shall not apply to any such additional amounts
     arising out of the retroactive application of any law, regulation, rule
     guideline or directive within such six (6) month period. A Lender or
     Issuing Lender shall be deemed to have obtained knowledge of any
     circumstances that would cause the Borrower to pay such additional amounts
     if any rules with respect to such increase have been published in the
     Federal Register and such knowledge shall be deemed to have been obtained
     on the later of the date when such new rule (i) is published in the Federal
     Register and (ii) becomes effective. Without prejudice to the survival of
     any other agreement of the Borrower hereunder, the agreements and
     obligations of the Borrower in this Section 2.10 shall survive the payment
                                         ------------
     of all other Obligations.

          SECTION 2.11.    Funding Losses. In the event any Lender shall incur
                           --------------
any loss or expense (including any loss or expense incurred by reason of the
liquidation or reemployment of deposits or other funds acquired by such Lender
to make, continue or maintain any portion of the principal amount of any Loan
as, or to convert any portion of the principal amount of any Loan into, a
Eurodollar Rate Loan) as a result of:

          (a)  repayment or prepayment of the principal amount of any Eurodollar
     Rate Loans on a date other than the last day of the Interest Period
     applicable thereto, whether pursuant to Section 2.8 or otherwise;
                                             -----------

          (b)  any conversion of all or any portion of the outstanding principal
     amount of any Eurodollar Rate Loans to Base Rate Loans prior to the
     expiration of the Interest Period then applicable thereto;

          (c)  any Loans not being made as Eurodollar Rate Loans in accordance
     with the Notice of Borrowing therefor; or

          (d)  any Loans not being continued as, or converted into, Eurodollar
     Rate Loans in accordance with the Continuation/Conversion Notice given
     therefor,

then, upon the request by the Administrative Agent on behalf of such Lender
(which request the Administrative Agent hereby agrees to deliver), the Borrower
shall pay to the Administrative Agent for the account of such Lender such amount
as will (in the reasonable determination of such Lender) reimburse such Lender
for such loss or expense. Solely for purposes of calculating amounts payable by
the Borrower to such Lenders under this Section 2.11, each Eurodollar Rate Loan
                                        ------------                           
made by a Lender (and each related reserve, special deposit or similar
requirement) shall be conclusively deemed to have been funded at the rate used
in determining the IBO Rate for such Eurodollar Rate Loan by a matching deposit
or other borrowing in the interbank eurodollar market for a comparable amount
and for a comparable period, whether or not such Eurodollar Rate Loan is in fact
so funded. Any claim by a Lender for reimbursement under this Section 2.11 shall
                                                              ------------
be set forth in a certificate delivered by such Lender to the Borrower and the
Administrative Agent showing in reasonable detail the basis for such 
calculation and shall be conclusive and binding absent manifest error. The
agreements and obligations of the Borrower in this Section 
                                                   -------

                                     -14-
<PAGE>
 
2.11 shall survive the payment of all other Obligations.
- ----

          SECTION 2.12.    Illegality.
                           ----------

          (a)  If any Lender shall determine that the introduction of any
     Applicable Law, or any change in any Applicable Law or in the
     interpretation or administration thereof, has made it unlawful, or that any
     central bank or other Governmental Authority has asserted that it is
     unlawful, for any Lender or its Applicable Lending Office to make
     Eurodollar Rate Loans, then, on notice thereof by such Lender to the
     Borrower through the Administrative Agent, the obligation of that Lender to
     make, convert into or continue Eurodollar Rate Loans, shall be suspended
     until such Lender shall have notified the Administrative Agent and the
     Borrower that the circumstances giving rise to such determination no longer
     exist.

          (b)  If a Lender shall determine that it is unlawful to maintain any
     Eurodollar Rate Loan, the Borrower shall prepay in full all Eurodollar Rate
     Loans of that Lender then outstanding, together with interest accrued
     thereon, or convert such Eurodollar Rate Loans into Base Rate Loans, either
     on the last day of the Interest Period thereof if such Lender may lawfully
     continue to maintain such Eurodollar Rate Loans to such day, or
     immediately, upon request therefor if such Lender may not lawfully continue
     to maintain such Eurodollar Rate Loans until the last day of the Interest
     Period, together with any amounts required to be paid in connection
     therewith pursuant to Section 2.11.
                           ------------ 

          (c)  If the Borrower is required to prepay any Eurodollar Rate Loan
     immediately as provided in Section 2.12(b), then concurrently with such
                                ---------------                             
     prepayment, the Borrower shall borrow from the affected Lender, in the
     amount of such repayment, a Base Rate Loan.

          (d)  If the obligation of any Lender to make or maintain Eurodollar
     Rate Loans has been terminated, the Borrower may elect, by giving notice to
     such Lender through the Administrative Agent that all Loans which would
     otherwise be made by such Lender as Eurodollar Rate Loans shall instead be
     Base Rate Loans.

          (e)  Before giving any notice to the Administrative Agent pursuant to
     this Section 2.12, the affected Lender shall designate a different
          ------------                                                 
     Eurodollar Office with respect to its Eurodollar Rate Loans if such
     designation will avoid the need for giving such notice or making such
     demand and will not, in the judgment of such Lender, be illegal or
     otherwise disadvantageous to such Lender.

          SECTION 2.13.    Right of the Lenders to Fund through Other Offices.
                           --------------------------------------------------  
Each Lender may, if it so elects, fulfill its commitment as to any Eurodollar
Rate Loan by causing a foreign branch or affiliate of such Lender to make such
Loan; provided that in such event for the purposes of this Agreement such Loan
      --------                                                                
shall be deemed to have been made by such Lender and the obligation of the
Borrower to repay such Loan shall nevertheless be to such Lender and shall be
deemed held by it, to the extent of such Loan, for the account of such branch or
affiliate.


                                     -15-
<PAGE>
 
          SECTION 2.14.    Commitment Fee and Fee Obligations Generally.
                           --------------------------------------------

          (a)  Commitment Fee. The Borrower agrees to pay to the Administrative
               -------------- 
     Agent, for the account of each Lender, a commitment fee (the "Commitment
                                                                   ----------
     Fee") in an amount equal to the product of (i) the Applicable Commitment
     ---                                                                     
     Fee Percentage multiplied by (ii) the daily average amount by which the
     Revolving Commitment Amount exceeds the sum of the outstanding principal
     balance of the Revolving Loans plus the then Letter of Credit Obligations,
                                    ----                                       
     for the period from the Closing Date until the Revolving Commitment
     Termination Date. The Commitment Fee shall be payable quarterly in arrears
     on the last day of each Fiscal Quarter for the Fiscal Quarter then ended
     and on the Revolving Commitment Termination Date. Solely for purposes of
     calculating the Commitment Fee under this Section 2.14(a), the equivalent
                                               ---------------                
     in Dollars of the undrawn face amount of each Letter of Credit made in an
     Alternative Currency shall be determined on the date of issuance of such
     Letter of Credit and shall be redetermined as of the last Business Day of
     each calendar month thereafter during which such Letter of Credit remains
     outstanding, with no interim adjustments with respect to any fluctuations
     in the value of such Alternative Currency.

          (b)  Certain Fees. The Borrower agrees to respectively pay to the Lead
               ------------ 
     Arranger, the Issuing Bank, and the Administrative Agent, for their
     respective own accounts, the fees in amounts and at the times set forth in
     that certain letter agreement dated as of July 29, 1998 among CVC, the Lead
     Arranger and the Issuing Bank and the Administrative Agent of even date
     herewith (the "Fee Letter").
                    ----------   

          (c)  Fee Obligations. The obligation of the Borrower to pay the fees
               ---------------
     described in this Section 2.14, and the Letter of Credit Fees described in
                       ------------                                            
     Section 3.3, shall be in addition to, and not in lieu of, the obligation of
     -----------                                                                
     the Borrower to pay interest and expenses and other amounts otherwise
     described in this Agreement. The fees described in this Section 2.14 shall
                                                             ------------      
     be fully earned on the earlier of the date paid or accrued and shall be
     non-refundable. The Letter of Credit Fees and the fees described in this
     Section 2.14 shall bear interest, if not paid when due, at the Default
     ------------                                                          
     Rate.

          SECTION 2.15.    Payments and Computations.
                           -------------------------

          (a)  Allocation. All payments by the Borrower pursuant to this
               ----------
     Agreement or any other Loan Document, whether in respect of principal of or
     interest on Loans or other Obligations, shall be made by the Borrower in
     Dollars no later than 1:00 P.M. (Chicago time) on the day when due to the
     Administrative Agent in same day funds. All payments in respect of
     principal of or interest on Loans or Letter of Credit Obligations shall
     (unless otherwise specified herein) be made by the Borrower to the
     Administrative Agent for the account of the Lenders pro rata according to
                                                         --- ----             
     the respective unpaid principal amounts of the Loans made by them or to
     their respective participation or other interests in such Letter of Credit
     Obligations, as the case may be. The payment of all fees referred to in
     Section 2.14 and Section 3.3 shall (unless otherwise specified therein) be
     ------------     -----------                                              
     made by the Borrower to the Administrative Agent for the account of the
     Lenders entitled thereto. All 


                                     -16-
<PAGE>
 
     other amounts payable to the Administrative Agent or any Lender under this
     Agreement or any other Loan Document shall be paid to the Administrative
     Agent for the account of the Person entitled thereto. Upon its acceptance
     of an Assignment and Acceptance and recording of the information contained
     therein in the Register pursuant to Section 9.7(d), from and after the
                                         --------------
     effective date specified in such Assignment and Acceptance, the
     Administrative Agent shall make all payments hereunder in respect of the
     interest assigned thereby to the Lender assignee thereunder, and the
     parties to such Assignment and Acceptance shall make all appropriate
     adjustments in such payments for periods prior to such effective date
     directly between themselves. The Administrative Agent shall promptly remit
     to each Lender in immediately available funds and in Dollars such Lender's
     share of all such payments received by the Administrative Agent for the
     account of such Lender.

          (b)  All computations of interest or fees hereunder or under any other
     Loan Document shall be made by the Administrative Agent on the basis of a
     year of 360 days, except that, with respect to Base Rate Loans (other than
     Base Rate Loans with respect to which the rate of interest is calculated on
     the basis of the Federal Funds Rate), the interest thereon shall be
     calculated on the basis of a year of 365 or 366 days, as the case may be,
     in each case for the actual number of days (including the first day but
     excluding the last day) occurring in the period for which such interest or
     fees are payable. Each determination by the Administrative Agent of an
     interest rate hereunder shall be conclusive and binding for all purposes,
     absent manifest error.

          (c)  Whenever any payment hereunder shall be stated to be due on a day
     other than a Business Day, such payment shall be made on the next
     succeeding Business Day, and such extension of time shall in such case be
     included in the computation of payment of interest or fees, as the case may
     be; provided if such extension would cause payment of interest on or
         --------                                                        
     principal of Eurodollar Rate Loans to be made in the next following
     calendar month, such payment shall be made on the next preceding Business
     Day.

          (d)  Unless the Administrative Agent shall have received notice from
     the Borrower prior to the date on which any payment is due to the Lenders
     hereunder that the Borrower will not make such payment in full, the
     Administrative Agent may assume that the Borrower has made such payment in
     full to the Administrative Agent on such date and the Administrative Agent
     may, in reliance upon such assumption, cause to be distributed to each
     Lender on such due date an amount equal to the amount then due such Lender.
     If and to the extent that the Borrower shall not have so made such payment
     in full to the Administrative Agent, each Lender shall repay to the
     Administrative Agent forthwith on demand such amount distributed to such
     Lender together with interest thereon, for each day from the date such
     amount is distributed to such Lender until the date such Lender repays such
     amount to the Administrative Agent, at the Federal Funds Rate.

          (e)  All payments of principal, interest, fees and all expenses and
     other amounts due hereunder or under any other Loan Document payable to the
     Lenders shall be made without condition and in same day funds and delivered
     to the Administrative Agent on the date thereof not later than the
     applicable cut-off time described in Section 2.15(a), and 
                                          ---------------                       


                                     -17-
<PAGE>
 
     funds received by the Administrative Agent after that time shall be deemed
     to have been paid on the next succeeding Business Day.

          (f)  Subject to the provisions of Section 2.8.2, each payment of
                                            -------------                 
     principal shall be applied to such Loans as the Borrower shall direct by
     notice received by the Administrative Agent on or before the date of such
     payment or, in the absence of such notice, first, to the unpaid principal
     amount of any outstanding Base Rate Loans, second, to the unpaid principal
     amount of any outstanding Eurodollar Rate Loans with those Eurodollar Rate
     Loans which have earlier expiring Interest Periods being repaid prior to
     those which have later expiring Interest Periods, and then as the
     Administrative Agent shall determine in its discretion. Concurrently with
     each remittance to any Lender of its share of any such payment, the
     Administrative Agent shall advise such Lender as to the application of such
     payment.

          SECTION 2.16.    Taxes.
                           -----

          (a)  Subject to Section 2.16(d), any and all payments by the Borrower
                          ---------------                                      
     to each Lender or the Administrative Agent under this Agreement shall be
     made free and clear of, and without, unless required by Applicable Law (in
     which case Section 2.16(d) shall apply), deduction or withholding for, any
                ---------------                                                
     and all present or future taxes, levies, imposts, deductions, charges or
     withholdings, and all liabilities with respect thereto, excluding, in the
     case of each Lender and the Administrative Agent, such taxes (including
     income taxes or franchise taxes) as are imposed on or measured by each
     Lender's net income by the jurisdiction under the laws of which such Lender
     or the Administrative Agent, as the case may be, is organized or maintains
     any Applicable Lending Office or any political subdivision thereof (all
     such non-excluded taxes, levies, imposts, deductions, charges, withholdings
     and liabilities being hereinafter referred to as "Taxes").
                                                       -----   

          (b)  In addition, the Borrower shall pay any present or future stamp
     or documentary taxes or any other excise or property taxes, charges or
     similar levies which arise from any payment made hereunder or from the
     execution, delivery or registration of, or otherwise with respect to, this
     Agreement or any other Loan Documents (hereinafter referred to as "Other
                                                                        -----
     Taxes").
     -----

          (c)  Subject to Section 2.16(g), the Borrower shall indemnify and hold
                          ---------------                                       
     harmless each Lender and the Administrative Agent for the full amount of
     Taxes or Other Taxes paid by Lender or the Administrative Agent and any
     liability (including penalties, interest, additions to tax and expenses)
     arising therefrom or with respect thereto, whether or not such Taxes or
     Other Taxes were correctly or legally asserted. Payment under this
     indemnification shall be made within thirty (30) days from the date Lender
     or the Administrative Agent makes written demand therefor, which written
     demand shall be made no sooner than thirty (30) days prior to the date
     Lender intends to pay such Taxes or Other Taxes and no later than ninety
     (90) days after such payment.


                                     -18-
<PAGE>
 
          (d)  If the Borrower shall be required by law to deduct or withhold
     any Taxes or Other Taxes from or in respect of any sum payable hereunder to
     any Lender or the Administrative Agent, then, subject to Section 2.16(g):
                                                              --------------- 

               (i)     the sum payable shall be increased as necessary so that
          after making all required deductions (including deductions applicable
          to additional sums payable under this Section 2.16) such Lender or the
                                                ------------ 
          Administrative Agent, as the case may be, receives an amount equal to
          the sum it would have received had no such deductions been made;

               (ii)    the Borrower shall make such deductions; and

               (iii)   the Borrower shall pay the full amount deducted to the
          relevant taxation authority or other authority in accordance with
          applicable law.

          (e)  Within thirty (30) days after the date of any payment by the
     Borrower of Taxes or Other Taxes, the Borrower shall furnish to the
     Administrative Agent the original or a certified copy of a receipt
     evidencing payment thereof, or other evidence of payment satisfactory to
     the Administrative Agent.

          (f)  Each Lender which is a foreign person (i.e., a person other than
                                                      ----
     a United States person for United States Federal income tax purposes)
     agrees that:

               (i)     it shall, no later than the Closing Date (or, in the case
          of a Lender which becomes a party hereto pursuant to Section 9.7 after
                                                               ----------- 
          the Closing Date, the date upon which Lender becomes a party hereto)
          deliver to the Borrower through the Administrative Agent two accurate
          and complete signed originals of IRS Form 4224 or any successor
          thereto ("Form 4224"), or two accurate and complete signed originals
                    ---------
          of IRS Form 1001 or any successor thereto ("Form 1001"), as
                                                      ---------
          appropriate, in each case indicating that the Lender is on the date of
          delivery thereof entitled to receive payments of principal, interest
          and fees under this Agreement free from withholding of United States
          Federal income tax;

               (ii)    if at any time the Lender makes any changes necessitating
          a new Form 4224 or Form 1001, it shall with reasonable promptness
          deliver to the Borrower through the Administrative Agent in
          replacement for, or in addition to, the forms previously delivered by
          it hereunder, two accurate and complete signed originals of Form 4224;
          or two accurate and complete signed originals of Form 1001, as
          appropriate, in each case indicating that the Lender is on the date of
          delivery thereof entitled to receive payments of principal, interest
          and fees under this Agreement free from withholding of United States
          Federal income tax;

               (iii)   it shall, before or promptly after the occurrence of any
          event (including the passing of time but excluding any event mentioned
          in clause(ii) above) requiring a change in or renewal of the most
             ----------                                                    
          recent Form 

                                     -19-
<PAGE>
 
          4224 or Form 1001 previously delivered by such Lender, deliver to the
          Borrower through the Administrative Agent two accurate and complete
          original signed copies of Form 4224 or Form 1001 in replacement for
          the forms previously delivered by the Lender; and

               (iv)    it shall, promptly upon the Borrower's or the
          Administrative Agent's reasonable request to that effect, deliver to
          the Borrower or the Administrative Agent (as the case may be) such
          other forms or similar documentation as may be required from time to
          time by any applicable law, treaty, rule or regulation in order to
          establish such Lender's tax status for withholding purposes.

          (g)  The Borrower will not be required to pay any additional amounts
     in respect of United States Federal income tax pursuant to Section 2.16(d)
                                                                ---------------
     to any Lender for the account of any Applicable Lending Office of such
     Lender:

               (i)     if the obligation to pay such additional amounts would
          not have arisen but for a failure by such Lender to comply with its
          obligations under Section 2.16(f) in respect of such Applicable
                            --------------- 
          Lending Office;

               (ii)    if such Lender shall have delivered to the Borrower a
          Form 4224 in respect of such Applicable Lending Office pursuant to
          Section 2.16(f), and such Lender shall not at any time be entitled to
          ---------------
          exemption from deduction or withholding of United States Federal
          income tax in respect of payments by the Borrower hereunder for the
          account of such Applicable Lending Office for any reason other than a
          change in United States law or regulations or in the official
          interpretation of such law or regulations by any governmental
          authority charged with the interpretation or administration thereof
          (whether or not having the force of law) after the date of delivery of
          such Form 4224; or

               (iii)   if the Lender shall have delivered to the Borrower a Form
          1001 in respect of such Applicable Lending Office pursuant to Section
                                                                        -------
          2.16(f), and such Lender shall not at any time be entitled to
          -------                                                      
          exemption from deduction or withholding of United States Federal
          income tax in respect of payments by the Borrower hereunder for the
          account of such Applicable Lending Office for any reason other than a
          change in United States law or regulations or any applicable tax
          treaty or regulations or in the official interpretation of any such
          law, treaty or regulations by any governmental authority charged with
          the interpretation or administration thereof (whether or not having
          the force of law) after the date of delivery of such Form 1001.

          (h)  If the Borrower is required to pay additional amounts to any
     Lender or the Administrative Agent pursuant to Section 2.16(d), then such
                                                    ---------------           
     Lender shall use its reasonable best efforts (consistent with legal and
     regulatory restrictions) to change the jurisdiction of its Applicable
     Lending Office so as to eliminate any such additional payment 

                                     -20-
<PAGE>
 
     by the Borrower which may thereafter accrue if such change in the judgment
     of such Lender is not otherwise disadvantageous to such Lender.

          (i)  Without prejudice to the survival of any other agreement of the
     Borrower hereunder, the agreements and obligations of the Borrower
     contained in this Section 2.16 shall survive the payment of all other
                       ------------                                       
     Obligations.

          SECTION 2.17.    Sharing of Payments, Etc.  If any Lender shall obtain
                           ------------------------
any payment (whether voluntary, involuntary, through the exercise of any right
of set-off, or otherwise) on account of the Loans or the Letters of Credit
(other than pursuant to Section 2.10, 2.11, 2.12(b), 2.16 or 3.3(b)) in excess
                        ------------  ----  -------  ----    ------           
of its ratable share of payments on account of such Loans and/or the Letters of
Credit obtained by all the Lenders entitled thereto, such Lender shall forthwith
purchase from the other Lenders such participations in such Loans and/or Letters
of Credit made by them as shall be necessary to cause such purchasing Lender to
share the excess payment ratably with each of them; provided that if all or any
                                                    --------                   
portion of such excess payment is thereafter recovered from the purchasing
Lender, such purchase from each such Lender shall be rescinded and each such
Lender shall repay to the purchasing Lender the purchase price to the extent of
such recovery together with an amount equal to such Lender's ratable share
(according to the proportion of (a) the amount of such Lender's required
repayment to (b) the total amount so recovered from the purchasing Lender) of
any interest or other amount paid or payable by the purchasing Lender in respect
of the total amount so recovered.  The Borrower agrees that any Lender so
purchasing a participation from another Lender pursuant to this Section 2.17
                                                                ------------
may, to the fullest extent permitted by law, exercise all its rights of payment
(including the right of set-off) with respect to such participation as fully as
if such Lender were the direct creditor of the Borrower in the amount of such
participation.

          SECTION 2.18.    Warranty. Each Notice of Borrowing pursuant to
                           --------
Section 2.4 and the delivery of each Letter of Credit Request pursuant to
- -----------
Section 3.2, shall automatically constitute a warranty by the Borrower to the
- ----------- 
Administrative Agent and each Lender to the effect that on the date of such
requested Borrowing or the issuance of the requested Letter of Credit, as the
case may be, (a) the warranties contained in the Loan Documents (except to the
extent changes in facts or conditions are expressly permitted or required
hereunder or thereunder) shall be true and correct in all material respects as
of such requested date as though made on the date thereof unless an earlier date
is so specified in such representation and warranty and (b) no Event of Default
or Default shall have then occurred and be continuing or will result therefrom.

          SECTION 2.19.    Conditions. Notwithstanding any other provision of
                           ----------
this Agreement (other than as set forth in Section 3.4), (a) no Lender shall be
                                           -----------                         
obligated to make any Loan, (b) no Lender shall be obligated to convert into or
permit the continuation at the end of the applicable Interest Period of any
Eurodollar Rate Loan and (c) the Issuing Lender shall not be obligated to issue
any Letter of Credit if, in any such case, an Event of Default or Default exists
or would result therefrom.

          SECTION 2.20.    All Obligations Secured. The Loans, the Reimbursement
                           -----------------------
Obligations, and all other Obligations of the Borrower and each other Person to
the 


                                     -21-
<PAGE>
 
Administrative Agent, the Issuing Lender, any Lender or any other Secured Party,
shall be secured by the Administrative Agent's Lien, for the benefit of the
Secured Parties, on all of the Collateral and by all other Liens heretofore,
now, or at any time or times hereafter granted by the Borrower or any other
Person to the Administrative Agent, the Issuing Lender, any Lender or any other
Secured Party to secure any Obligations. The Borrower agrees that all of the
rights of the Secured Parties set forth in this Agreement shall apply to any
modification, amendment or restatement of, or supplement to, this Agreement, any
supplements or exhibits hereto, and the other Loan Documents, unless otherwise
agreed in writing.

          SECTION 2.21.    Use of Proceeds. The Borrower shall apply the
                           ---------------
proceeds of the initial Borrowing (a) to the payment of the "Merger
Consideration" under and as defined in the Merger Agreement, (b) as a
contribution to GLI's equity capital and, to the extent so applied, cause GLI to
repay in full all "Obligations" under (and as defined in) the Existing Agreement
(other than contingent indemnification and expense reimbursement obligations),
(c) to pay fees and expenses incurred in connection with this Agreement, the
Merger Agreement, the Reliance Agreement, the other Restructuring Transactions
and the transactions contemplated hereby and thereby and/or (d) for the purposes
set forth in the immediately following sentence. The Borrower shall apply the
proceeds of each other Borrowing, and shall utilize each Letter of Credit, for
its and its Subsidiaries ongoing working capital needs and/or general corporate
purposes not inconsistent with the provisions of the Loan Documents (including,
without limitation, all payments due and owing by the Borrower after the Closing
Date pursuant to the terms of the Merger Agreement and not prohibited by the
terms of this Agreement).

          SECTION 2.22.    Assignment of Commitments Under Certain
                           ---------------------------------------
Circumstances. In the event that the Administrative Agent shall have delivered a
- -------------
notice or certificate on behalf of any Lender pursuant to Section 2.10 or 2.12,
                                                          ------------    ----
or the Loan Parties shall be required to make additional payments to any Lender
under Section 2.16, the Borrower shall have the right, at its own expense, upon
      ------------ 
notice to such Lender and Administrative Agent, not later than sixty (60) days
following such Lender's delivery of such notice or certificate, to require such
Lender to transfer and assign, without recourse or discount, in accordance with
and subject to the restrictions contained in Section 9.7, all of its interests,
                                             -----------
rights and obligations under this Agreement (including, without limitation, its
Commitments and its Percentage of the Obligations) to one or more financial
institutions chosen by the Borrower (and approved by the Administrative Agent
and the Issuing Bank, which approval shall not be unreasonably withheld) which
have agreed to so acquire and assume such interests, rights and obligations. A
Lender shall not be required to make any such transfer and assignment unless all
Obligations owing to such Lender, including, without limitation, those arising
under Sections 2.10, 2.12 and 2.16, have been paid in full and such Lender shall
      -------------  ----     ----
have no further obligations with respect to its Commitments, and no Lender shall
be required to make any such transfer and assignment if prior thereto the
circumstances entitling the Borrower to require such a transfer and assignment
cease to apply as a result of such Lender's withdrawing its notice or
certificate pursuant to Section 2.10 or 2.12, as applicable.
                        ------------    ----


                                     -22-
<PAGE>
 
                                  ARTICLE III

                               LETTERS OF CREDIT
                               -----------------
 
          SECTION 3.1.     Commitment for Letters of Credit. The Issuing Lender
                           --------------------------------
agrees, on the terms and conditions contained herein, to issue Letters of Credit
in Dollars or in Alternative Currencies for the account of the Borrower, and
each Lender severally agrees to participate in all Letters of Credit (including
Existing L/C's) issued by the Issuing Lender hereunder, in a Dollar equivalent
amount equal to its respective Percentage, from time to time during the period
commencing on the date hereof, and continuing until the Revolving Commitment
Termination Date; provided that (a)the Letter of Credit Obligations shall not at
                  --------                                                      
any time exceed the Letter of Credit Availability; and (b)all such Letters of
Credit shall be in form and substance acceptable to the Issuing Lender and the
Administrative Agent.

          SECTION 3.2.     Issuance of Letters of Credit.
                           -----------------------------

          (a)  The Borrower shall give the Issuing Lender prior written notice
     (a "Letter of Credit Request") not later than 11:00 A.M. (Chicago time) on
         ------------------------
     the Business Day immediately preceding the date on which the issuance or
     amendment of a Letter of Credit is requested or, in the case of a requested
     Letter of Credit to be denominated in an Alternative Currency, on the
     Business Day immediately preceding the date on which the issuance or
     amendment of such a Letter of Credit requested (or, in either case, such
     shorter time if consented to by the Administrative Agent and the Issuing
     Lender), specifying:

               (i)     the requested date for issuance or amendment of such
          Letter of Credit, which shall be a Business Day;

               (ii)    the expiry date of such Letter of Credit, which shall be
          a Business Day and on or prior to the earlier of (A) the Revolving
          Commitment Termination Date and (B) the four (4) year anniversary of
          the date of issuance thereof;

               (iii)   the beneficiary of such Letter of Credit;

               (iv)    the aggregate face amount of such Letter of Credit and
          the requested currency in which such Letter of Credit is to be
          denominated;

               (v)     whether the Letter of Credit to be issued is a Financial
          Letter of Credit or a Performance Letter of Credit; and

               (vi)    the conditions for drawing to be included in such Letter
          of Credit.

Each such Letter of Credit Request shall be by telecopier, telex or cable,
confirmed immediately in writing by mail, in substantially the form of Exhibit D
                                                                       ---------
and executed by an authorized officer of the Borrower.


                                     -23-
<PAGE>
 
          (b)  Upon receipt of a Letter of Credit Request, the Issuing Lender
     shall promptly send a copy thereof to the Administrative Agent who shall
     then notify each Lender of the contents thereof. Upon satisfaction of the
     conditions precedent specified in Article IV hereof, and subject to the
                                       ----------                           
     provisions of Section 3.2(c), the Issuing Lender shall issue the Letter of
                   --------------                                              
     Credit requested to be issued by it or amend the Letter of Credit requested
     to be amended, as the case may be, on the date specified in the Letter of
     Credit Request; provided that the Issuing Lender shall not issue or
                     --------                                           
     maintain a Letter of Credit having an expiry date later than the earlier of
     (i) the Revolving Commitment Termination Date and (ii) the four (4) year
     anniversary of the date of issuance thereof.

          (c)  In the case of a requested Letter of Credit to be denominated in
     an Alternative Currency, the obligation of the Issuing Lender to issue such
     Letter of Credit is subject to the confirmation by the Issuing Lender to
     the Administrative Agent on the Business Day of the requested date of such
     issuance that the Issuing Lender agrees to issue such Letter of Credit in
     the requested Alternative Currency, which confirmation shall be promptly
     forwarded by the Administrative Agent to the Borrower. If the Issuing
     Lender shall not have so provided to the Administrative Agent such
     confirmation, the Administrative Agent shall promptly notify the Borrower
     that the Issuing Lender has not provided such confirmation, and the
     Borrower's request for such Letter of Credit in such Alternative Currency
     shall be deemed to have been thereupon withdrawn by the Borrower.

          SECTION 3.3.     Letter of Credit Fee. The Borrower agrees to pay to
                           -------------------- 
the Administrative Agent (a) ratably for the account of each Lender, a letter of
credit fee for the term of such Letter of Credit at the rate equal to the
aggregate face amount outstanding of such Letter of Credit multiplied by (i) in
                                                           -------------       
the case of Performance Letters of Credit, subject to Section 2.10(c), the then
                                                      ---------------          
Applicable Performance Letter of Credit Fee Percentage and (ii) in the case of
Financial Letters of Credit, the then Applicable Financial Letter of Credit Fee
Percentage, and (b) for the Issuing Lender's own account (in addition to its
Percentage of the fee payable to it as a Lender, in accordance with clause (a)
                                                                    ----------
above), a letter of credit fee for the term of such Letter of Credit at the rate
set forth in the Fee Letter based upon the aggregate face amount outstanding of
each such Letter of Credit and the Issuing Lender's customary processing fees
for the issuance, amendment or renewal of the Letter of Credit. The fee for any
Letter of Credit issued by the Issuing Lender hereunder, as determined in
accordance with clauses (a) and (b) above (the "Letter of Credit Fee"), shall be
                -----------     ---             --------------------            
payable quarterly in arrears on the last day of each Fiscal Quarter, on the
Revolving Commitment Termination Date and on the earliest of the cancellation,
expiration or return of such Letter of Credit to the Issuing Lender; provided
                                                                     --------
that if any Letter of Credit is canceled and/or returned to the Issuing Lender
prior to the expiration thereof, the Borrower shall from time to time, upon
demand by the Issuing Lender and/or any Lender therefor, immediately pay to the
Issuing Lender and/or such Lender additional amounts sufficient to compensate it
for its expenses not covered by a previously received Letter of Credit Fee. A
certificate as to the amount of such expenses submitted to the Borrower and the
Administrative Agent by the Issuing Lender and/or such Lender, showing in
reasonable detail the calculation thereof, shall be conclusive and binding for
all purposes, absent manifest error.


                                     -24-
<PAGE>
 
          SECTION 3.4.     Obligations of the Lenders to Issuing Lender under a
                           ----------------------------------------------------
Letter of Credit. The Issuing Lender will notify the Administrative Agent, and
- ----------------                                                               
the Administrative Agent will thereupon notify each other Lender, promptly upon
presentation to it of a draft for payment drawn under, or purporting to be drawn
under, a Letter of Credit issued by it; provided that the Administrative Agent
                                        --------                              
and each Lender shall have received notice by 2:00 P.M. (Chicago time) on the
Business Day on which the Issuing Lender intends to make payment of each such
draft, to the extent that the Borrower fails to provide funds therefor, each
other Lender shall make payment to the Issuing Lender in immediately available
funds and in Dollars at the Issuing Lender's Domestic Lending Office of an
amount equal to the Dollar equivalent amount of the Issuing Lender's payment
multiplied by such other Lender's Percentage. The obligation of each Lender to
make payments to the Issuing Lender under this Section 3.4 shall be
                                               -----------         
unconditional, continuing, irrevocable and absolute regardless of whether or not
any of the conditions set forth in Article IV are then satisfied. In the event
                                   ----------                                  
that any Lender fails to make payment to the Issuing Lender of any amount due
under this Section 3.4, the Issuing Lender shall be entitled to receive the
           -----------                                                     
principal and interest otherwise payable to such Lender hereunder with respect
to such amount until the Issuing Lender receives such payment from such Lender;
provided that nothing contained in this sentence shall relieve such Lender of
- --------                                                                     
its obligation to make payment to the Issuing Lender for such amounts in
accordance with this Section 3.4.
                     ----------- 

          SECTION 3.5.     Reimbursement Obligation. The Borrower agrees
                           ------------------------
unconditionally and irrevocably to pay to the Administrative Agent in Dollars
and in immediately available funds for the account of the Issuing Lender (and,
to the extent such payments were made by the Lenders pursuant to Section 3.4,
                                                                 ----------- 
for the account of such Lenders), upon demand therefor by the Administrative
Agent (which demand the Administrative Agent hereby agrees to deliver), the
Dollar equivalent amount of each payment which is drawn under a Letter of
Credit, or which purports to be so drawn (such obligation of the Borrower being
referred to herein as a "Reimbursement Obligation" with respect to such Letter
                         ------------------------                             
of Credit). If at any time the Borrower fails immediately to repay a
Reimbursement Obligation pursuant to this Section 3.5, the Borrower shall be
                                          -----------                       
deemed to have requested a Revolving Loan which is a Base Rate Loan, as of the
date of the payment giving rise to the Reimbursement Obligation, from each
Lender, equal in amount to such Lender's Percentage multiplied by the Dollar
equivalent amount of the unpaid Reimbursement Obligation, the proceeds of which
shall be used to repay such Reimbursement Obligation. If, as a result of a
Default or an Event of Default, a Revolving Loan may not be made on a date on
which such Loan would be deemed to have been requested pursuant to the preceding
sentence, the unpaid Dollar equivalent amount of the Reimbursement Obligation
shall bear interest at the Default Rate and shall be payable on demand.
Regardless of the expiration date of any Letter of Credit, the Borrower shall
remain liable with respect to each Letter of Credit and all letter of credit
fees shall continue to accrue, until the Issuing Lender is released from
liability by every Person which is entitled to draw or demand payment under such
Letter of Credit.

          SECTION 3.6.     Representatives of Beneficiaries. The Issuing Lender
                           --------------------------------
may receive, accept or pay as complying with the terms of such Letter of Credit,
any drafts or other documents, otherwise in order, which may be signed by, or
issued to, the administrator or executor of, or the trustee in bankruptcy of, or
the receiver for any of the property of, the party in 


                                     -25-
<PAGE>
 
whose name such Letter of Credit provides that any drafts or other document
should be drawn or issued.

          SECTION 3.7.     Responsibility of the Administrative Agent, the
                           -----------------------------------------------
Issuing Lender and the Lenders. Neither the Administrative Agent, the Issuing
- ------------------------------
Lender nor any Lender shall be liable or responsible for:

          (a)  the use which may be made of the Letters of Credit or for any
     acts or omissions of the beneficiary(ies) in connection therewith;

          (b)  the validity, sufficiency or genuineness of documents, or of any
     endorsement(s) thereon, even if such documents should in fact prove to be
     in any or all respects invalid, insufficient, fraudulent or forged;

          (c)  failure of any draft to bear any reference or adequate reference
     to a Letter of Credit, or failure of documents to accompany any draft at
     negotiation, or failure of any Person to surrender or to take up a Letter
     of Credit or to send forward documents, apart from drafts required by the
     terms of the relevant Letter of Credit, each of which provisions, if
     contained in such Letter of Credit itself, it is agreed may be waived by
     the Issuing Lender;

          (d)  errors, omissions, interruptions or delays in transmission or
     delivery of any messages, by mail, cable, telegraph, wireless, or
     otherwise, whether or not they may be in cipher; or

          (e)  any other circumstances whatsoever in making or failing to make
     payment under a Letter of Credit;

except only that the Borrower shall have a claim against the Issuing Lender, and
the Issuing Lender shall be liable to the Borrower, to the extent, but only to
the extent, of any direct, as opposed to consequential, damages suffered by the
Borrower which are determined to be caused by (i) the Issuing Lender's willful
misconduct, bad faith or gross negligence or (ii) the Issuing Lender's willful
or grossly negligent failure to pay under the relevant Letter of Credit after
the presentation to the Issuing Lender by the relevant beneficiary of such
Letter of Credit of a sight draft and certificate strictly complying with the
terms and conditions of such Letter of Credit.

          The happening of any one or more of the contingencies referred to in
subparagraphs (a), (b), (c), (d) or (e) above shall not affect, impair or
- ------------- ---  ---  ---  ---    ---                                  
prevent the vesting of any of the rights or powers of the Issuing Lender, the
Lenders or the Administrative Agent hereunder. In furtherance and extension and
not in limitation of the specific provisions hereinbefore set forth, it is
hereby further agreed that any action, inaction or omission taken or suffered by
the Administrative Agent, the Issuing Lender or any Lender, under or in
connection with a Letter of Credit or the relative drafts, documents or assets,
if in conformity with such foreign or domestic laws, customs or regulations as
are applicable thereto and without willful misconduct, bad faith or gross
negligence, shall be binding upon the Borrower and shall not place the
Administrative 


                                     -26-
<PAGE>
 
Agent, the Issuing Lender or any Lender under any resulting liability to the
Borrower. The word "assets" as used in this Section 3.7 includes goods and
                                            -----------
merchandise, as well as any and all documents relative thereto, securities,
funds, choses in action, and any and all other forms of property, whether real,
personal or mixed and any right or interest of the Borrower therein or thereto.

          SECTION 3.8.     Modifications to Letters of Credit. In the event of
                           ----------------------------------
any change or modification with respect to (a) the amount or duration of any
Letter of Credit, (b) the drawing, negotiation, presentation, acceptance, or
maturity of any drafts, acceptances or other documents, or (c) any of the other
terms or provisions of any Letter of Credit, such being done at the request of
the Borrower, this Agreement shall be binding upon the Borrower in all respects
with regard to the Letter of Credit so changed or modified, inclusive of any
action taken by the Issuing Lender or any Lender with respect to such Letter of
Credit.

          SECTION 3.9.     Uniform Customs and Practice for Documentary Credits.
                           ----------------------------------------------------
Except as otherwise expressly provided in this Agreement or as the Borrower and
the Lenders may otherwise expressly agree with regard to, and prior to the
issuance of, a Letter of Credit, the "Uniform Customs and Practice for
Documentary Credits (1993 Revision), International Chamber of Commerce
Publication No. 500," as hereafter amended, revised, supplemented, or replaced
by other publication of similar effect, shall in all respects be deemed a part
hereof as fully as if incorporated herein and shall apply to such Letter of
Credit.

          SECTION 3.10.    Indemnification. The Borrower hereby agrees to
                           ---------------
indemnify and hold harmless the Administrative Agent, the Issuing Lender and
each Lender from and against any and all claims, damages, losses, liabilities,
costs or expenses whatsoever which the Administrative Agent, the Issuing Lender
or a Lender may incur (or which may be claimed against the Administrative Agent,
the Issuing Lender or a Lender by any Person) by reason of or in connection with
the execution and delivery or transfer of, or payment or failure to pay under,
any Letter of Credit; provided that the Borrower shall not be required to
                      --------                                           
indemnify the Issuing Lender for any claims, damages, losses, liabilities, costs
or expenses to the extent, but only to the extent, caused by the willful
misconduct, bad faith or gross negligence of the Issuing Lender, the
Administrative Agent or any Lender.  Nothing in this Section 3.10 is intended to
                                                     ------------               
limit the reimbursement obligation of the Borrower contained in Section 3.5
                                                                -----------
hereof.

          SECTION 3.11.    Transitional Provisions. GLI, the Administrative
                           ----------------------- 
Agent and certain of the Lenders and other financial institutions (collectively,
the Existing Lenders") are currently parties to that certain Credit Agreement
    ----------------
dated as of September 24, 1997 (as may have been heretofore amended, the
"Existing Agreement") pursuant to which, among other things, Bank of America, as
 ------------------
"Issuing Lender" thereunder issued certain "Letters of Credit" (as defined
therein) for the account of GLI (to the extent outstanding on the Closing Date
and set forth on Schedule III, the "Existing L/C's"). As of the Closing Date,
                 ------------       --------------
the Borrower hereby assumes all of GLI's reimbursement and other obligations
with respect to each Existing L/C, and each of the Existing L/C's shall remain
outstanding and constitute Letters of Credit issued by the Issuing Lender for
the account of the Borrower pursuant to this Agreement on the Closing Date for
all purposes under this Agreement and any other Loan Document, including, for
the purpose of the


                                     -27-
<PAGE>
 
accrual and payment of Letter of Credit Fees payable pursuant to Section 3.3 for
                                                                 ----------- 
the remaining term of such Existing L/C's (other than for customary processing
fees for the issuance, amendment or renewal of such Existing L/C's occurring
prior to the Closing Date or relating to the deemed issuance thereof occurring
on the Closing Date). All "Reimbursement Obligations" and other "Letter of
Credit Obligations" (as respectively defined in the Existing Agreement) which
remain outstanding on the Closing Date with respect to the Existing L/C's shall
constitute Reimbursement Obligations and Letter of Credit Obligations of the
Borrower under this Agreement and shall be included in the calculations of
Availability and Letter of Credit Availability. Schedule III sets forth, as of
                                                ------------
the date hereof, the aggregate outstanding face amount, identifying number,
expiry date and name of the beneficiary, with respect to each Existing L/C's.

          SECTION 3.12.    Currency Equivalents. For all purposes of this
                           --------------------
Agreement, (i) the equivalent in Dollars of any Alternative Currency shall be
determined by using the quoted spot rate at which the Issuing Lender (or its
Affiliate) offers to exchange Dollars for such Alternative Currency two Business
Days prior to the date on which such equivalent is to be determined and (ii) the
equivalent in any Alternative Currency of Dollars shall be determined by using
the quoted spot rate at which the Issuing Lender (or its Affiliate) offers to
exchange such Alternative Currency for Dollars two Business Days prior to the
date on which such equivalent is to be determined. Except as specified in
Section 2.14(a), the equivalent in Dollars of each Letter of Credit made in an
- ---------------                                                               
Alternative Currency shall be recalculated hereunder on each date that it shall
be necessary or desirable by any party to determine the amount of the
Availability, the Letter of Credit Availability, the Letter of Credit
Obligations, the Reimbursement Obligations, the Obligations or the face amount
of any Letter of Credit on such date. Upon the request by any party hereto, the
Issuing Lender shall promptly make such determination and notify such requesting
party of such determination.

                                  ARTICLE IV

                             CONDITIONS OF LENDING
                             ---------------------
 
          SECTION 4.1.     Conditions Precedent to Initial Borrowing and Initial
                           -----------------------------------------------------
Issuance of Letters of Credit. The obligation of each Lender on the Closing Date
- -----------------------------
to make its Loans requested to be made by it and the agreement of the Issuing
Lender to issue the initial Letters of Credit to be issued or deemed issued on
the Closing Date shall be subject to the satisfaction of each of the following
conditions precedent set forth in this Section 4.1:
                                       ----------- 

          (a)  Delivery of Documents. The Administrative Agent shall have
               ---------------------
     received counterparts of this Agreement and all other agreements, documents
     and instruments described in the List of Closing Documents attached hereto
     as Schedule IV (including legal opinions from counsel to the Loan Parties
        -----------
     substantially in the forms attached hereto as Exhibit E, and the Loan
                                                   ---------
     Parties hereby direct their counsel to prepare and deliver the same to the
     Secured Parties), each duly executed, completed and acknowledged where
     appropriate and in form and substance reasonably satisfactory to the
     Lenders and in sufficient copies for each of the Lenders.


                                     -28-
<PAGE>
 
          (b)  Financial Statements. The Administrative Agent shall have
               --------------------
     received the financial statements described in Section 5.1(f)
                                                    --------------

          (c)  Lender Tax Forms. The Administrative Agent and the Borrower shall
               ----------------
     have received from each Lender organized under the laws of a jurisdiction
     other than the United States, two executed copies of United States Internal
     Revenue Service Form 4224 or Form 1001 or such other forms or documents (or
     successor forms or documents) appropriately completed, as may be applicable
     to establish the extent, if any, to which payments to such Lender pursuant
     to this Agreement are exempt from withholding or deduction of Taxes imposed
     by the United States government.

          (d)  Other Documents. The Administrative Agent shall have received
               ---------------
     such other approvals, opinions or documents as the Administrative Agent or
     any Lender may reasonably request.

          (e)  Satisfactory Legal Form. All documents executed or submitted
               -----------------------
     pursuant hereto by or on behalf of the Borrower or any of its Subsidiaries
     or any other Loan Party shall be reasonably satisfactory in form and
     substance to the Administrative Agent and its counsel; the Administrative
     Agent and its counsel shall have received all information, approvals,
     opinions, documents or instruments as the Administrative Agent or its
     counsel may reasonably request.

          (f)  Evidence and Perfection of Liens. The Administrative Agent shall
               --------------------------------                                 
     have received (i) such documents as the Administrative Agent may reasonably
     request to evidence and perfect all Liens granted by the Collateral
     Documents and (ii) such other evidence that all other actions necessary or,
     in the opinion of the Administrative Agent, desirable to perfect and
     protect the priority of the security interests and liens created by the
     Collateral Documents, and to enhance the Administrative Agent's ability to
     preserve and protect its interests in and access to the Collateral, have
     been taken or arrangements satisfactory to the Administrative Agent are in
     place therefor.

          (g)  Termination of Existing Agreement. All Debt and all other
               ---------------------------------                         
     obligations of the Loan Parties under the Existing Agreement (other than
     contingent indemnification and expense reimbursement obligations) shall be
     repaid from the proceeds of the initial Loans hereunder, and all agreements
     and instruments evidencing and securing such Debt shall be terminated, and
     the Administrative Agent shall have received a payoff letter, releases and
     termination statements related thereto reasonably acceptable to the
     Administrative Agent or assurances reasonably satisfactory to the
     Administrative Agent that such releases and termination statements will be
     delivered promptly after the Closing Date.

          (h)  Restructuring Transactions. The Administrative Agent shall have
               --------------------------                                      
     received evidence reasonably satisfactory to it that each of the
     representations and warranties set forth in Section 5.1(v) are true and
                                                 --------------             
     accurate, including, without limitation, (i) copies of a file-stamped
     certificate of merger with respect to the Merger or other evidence
     reasonably satisfactory to the Administrative Agent that such certificate
     of merger has been filed and 


                                     -29-
<PAGE>
 
     all waiting periods with respect to the Hart-Scott-Rodino Antitrust
     Improvements Act of 1976, as amended, have expired or been waived with
     respect to the Merger and related transactions, (ii) evidence that the
     Borrower has received gross cash proceeds of at least $37,700,000 from the
     Initial Capital Contribution and that all of such proceeds have been
     contributed by the Borrower's shareholders to the equity capital of the
     Borrower, (iii) evidence that the Borrower has received gross cash proceeds
     of at least $115,000,000 from the Note Issuance (less fees and expenses
     incurred by the Borrower in connection therewith, as contemplated by the
     Note Indenture) and that such net proceeds shall have been applied to the
     payment of the consideration payable to the Borrower's shareholders
     pursuant to the terms of the Merger Agreement, (iv) agreements and other
     assurances from the Existing Lenders that, upon application of the proceeds
     of the initial Loans to be made hereunder, the Refinancing will have been
     consummated and shall be effective and the Liens securing the obligations
     under the Existing Agreement will be released and (v) copies of all
     executed and delivered Restructuring Documents.

          (i)    Bonding and Intercreditor Agreements.  The Administrative Agent
                 ------------------------------------                           
     shall have received a fully executed Intercreditor Agreement which shall be
     in form and substance reasonably satisfactory to the Administrative Agent
     and the Lenders, and a certified copy of the Bonding Agreement in existence
     on the Closing Date, which shall be in form and substance satisfactory to
     the Administrative Agent.

          (j)    Closing Fees, Expenses, etc. The Administrative Agent shall
                 ---------------------------
     have received for its own account, or for the account of each Lender, as
     the case may be, all fees then due and payable pursuant to Section 2.14 and
                                                                ------------
     all costs and expenses which have been invoiced and are payable pursuant to
                                                                            
     Section 9.4.
     ----------- 

          (k)    Other Conditions. The conditions precedent to each Borrowing as
                 ----------------
     provided in Section 4.2 shall be satisfied on the Closing Date.
                 -----------

          SECTION 4.2.     Conditions Precedent to Each Borrowing and Each
                           -----------------------------------------------
Issuance of a Letter of Credit. The obligation (a) of each Lender to make its
- ------------------------------
initial Loans and each subsequent Loan and (b) of the Issuing Lender to issue
its initial and each subsequent Letter of Credit (other than the Existing L/C's)
and the Lenders' obligations to participate in such Letters of Credit shall be
subject to the further conditions precedent that on the date of each such
Borrowing or the issuance of such Letter of Credit:

          (a)  the following statements shall be true (and each of the giving of
     an applicable Notice of Borrowing, or a Letter of Credit Request, and the
     acceptance by the Borrower of the proceeds of such Loan, or the issuance of
     such Letter of Credit, shall constitute a representation and warranty by
     the Borrower that on the date of such Loan, or the issuance of such Letter
     of Credit, such statements set forth in clauses (i) through (iii) are
                                             -----------         -----    
     true):

               (i)   The representations and warranties contained in Section 5.1
                                                                     -----------
          and in the other Loan Documents are correct in all material respects
          on and as of the date 


                                     -30-
<PAGE>
 
          of such Loan or the issuance of such Letter of Credit, as the case may
          be, both before and after giving effect to such Loan or the issuance
          of such Letter of Credit, and, in the case of any such Loan, to the
          application of the proceeds therefrom, as though made on and as of
          such date except for any representation or warranty which is specified
          as being made as of an earlier date, in which case such representation
          or warranty shall only speak as to such earlier date;

               (ii)   No event has occurred and is continuing, or would result
          from such Loan or the issuance of such Letter of Credit, as the case
          may be, or, in the case of any such Loan, from the application of the
          proceeds therefrom, which constitutes a Default or an Event of
          Default; and

               (iii)  (A) Revolving Loans outstanding plus the Letters of Credit
                                                      ----                      
          Obligations shall not exceed the Revolving Commitment Amount, both
          before and after giving effect to such Loan and/or such Letter of
          Credit and (B) in the case of the issuance of a Letter of Credit, the
          Letter of Credit Obligations shall not exceed the Letter of Credit
          Availability, both before and after giving effect to such Letter of
          Credit.

          (b)  no law or regulation shall prohibit, and no order, judgment or
     decree of any Governmental Authority shall enjoin, prohibit or restrain,
     such Lender from making the requested Loan, or issuing or participating in
     the requested Letter of Credit, as the case may be.

          SECTION 4.3.  No Waiver.  In no event shall any Lender's making of any
                        ---------                                               
Loan or issuance of or participation in a Letter of Credit hereunder at a time
when any condition precedent to any Loan or Letter of Credit, as specified in
this Article IV, was not satisfied (a) constitute a waiver of such condition by
     ----------                                                                
such Lender with respect to subsequently requested Loans or Letters of Credit,
or (b) to the extent such unsatisfied condition constituted a Default or Event
of Default, constitute a waiver by any Lender of such Default or Event of
Default.

                                   ARTICLE V

                         REPRESENTATIONS AND WARRANTIES
                         ------------------------------

          SECTION 5.1.  Representations and Warranties of the Loan Parties.  In
                        --------------------------------------------------     
order to induce the Lenders and the Issuing Lender to enter into this Agreement,
and to make the Loans and issue, maintain and/or participate in the Letters of
Credit, each Loan Party which is a party hereto represents and warrants to each
Lender and the Issuing Lender as of the Closing Date, and (unless specified to
speak only as of a specified date) on and as of the date of any Loan or the
issuance, amendment or extension of any Letter of Credit that:

          (a)  Organization; Corporate Powers.  Each Loan Party (i) is a
               ------------------------------                           
     corporation duly organized, validly existing and in good standing under the
     laws of the jurisdiction of its organization (except to the extent that
     such Loan Party's failure to be in good standing 

                                     -31-
<PAGE>
 
     under such laws could not reasonably be expected to have a Material Adverse
     Effect and except as otherwise as a result of a transaction permitted under
     Section 6.2(a)(i)), (ii) is duly qualified to do business as a foreign
     -----------------  
     corporation and in good standing under the laws of each jurisdiction in
     which such qualification and good standing are necessary in order for it to
     conduct its business and own its property as heretofore conducted and owned
     (except such jurisdictions where failure to so qualify could not reasonably
     be expected to have a Material Adverse Effect), and (iii) has all requisite
     corporate power to conduct its business, to own and operate its property
     and to execute, deliver and perform all of its obligations under the Loan
     Documents and other Restructuring Documents to which it is a party.

          (b)  Authorizations; Enforceability.  Each Loan Party has the 
               ------------------------------ 
     requisite corporate authority to execute, deliver and perform each of the
     Loan Documents and other Restructuring Documents executed by it. Each of
     the Loan Documents and other Restructuring Documents to which any Loan
     Party is party has been duly executed and delivered by such Loan Party and
     constitutes the legal, valid and binding obligation of such Loan Party,
     enforceable against such Loan Party in accordance with its terms, subject
     to bankruptcy, insolvency, reorganization, moratorium or other similar laws
     affecting creditors' rights generally and to general principles of equity,
     regardless of whether enforcement is sought in a proceeding at law or in
     equity.

          (c)  No Conflict.  The execution, delivery and/or performance by each
               -----------
     Loan Party of each Loan Document and other Restructuring Document to which
     it is a party do not and will not, by the lapse of time, the giving of
     notice or otherwise, (i) constitute a violation of any Applicable Law or a
     breach of any provision contained in such party's charter or by-laws or
     contained in any material agreement, instrument or document to which the
     Borrower or any of its Subsidiaries is a party or by which it is bound or
     (ii) result in or require the creation or imposition of any Lien whatsoever
     upon any of the properties or assets of the Parent or any of its
     Subsidiaries (other than Liens granted pursuant to the Collateral
     Documents).

          (d)  Approvals.  No approval, consent or authorization of, or notice 
               ---------                                                        
     to or filing with, any Governmental Authority or any securities exchange is
     required in connection with the execution, delivery or performance by any
     Loan Party of any of the Loan Documents or other Restructuring Documents,
     or the granting of a Lien on any of the Collateral in the manner and for
     the purpose contemplated by the Collateral Documents, except (i) filings
     and recording to perfect such Liens, (ii) those obtained on or prior to the
     Closing Date and (iii) those which, if not obtained, could not reasonably
     be expected to have a Material Adverse Effect.

          (e)  Licenses and Permits.  Each of the Borrower and its Subsidiaries
               --------------------
     owns or possesses or is licensed or otherwise has the right to use all
     Permits and other governmental approvals and authorizations, franchises,
     authorizations and other rights that are reasonably necessary for the
     operations of its business, without conflict with the rights 

                                     -32-
<PAGE>
 
     of any other Person with respect thereto, except where the failure to be so
     licensed or to have such Permits would not have a Material Adverse Effect.

          (f)  Financial Reports.  The consolidated balance sheet of the 
               -----------------
     Borrower and its Subsidiaries as at December 31, 1997 and as at June 30,
     1998, and the related consolidated statements of earnings and cash flows of
     the Borrower and its Subsidiaries for the Fiscal Year ended December 31,
     1997 and for the period from January 1, 1998 through June 30, 1998, copies
     of each of which have been furnished to each Lender, fairly present in all
     material respects the consolidated financial condition of the Borrower and
     its Subsidiaries as at such respective dates and the consolidated results
     of the operations of the Borrower and its Subsidiaries for such respective
     periods ended on such dates, all in accordance with GAAP, consistently
     applied, provided that such financial statements delivered for any period
     other than a Fiscal Year may lack certain footnote disclosures which would
     otherwise be required by GAAP and may be subject to normal year-end
     adjustments. Since December 31, 1997, there has been no change in any
     circumstances, facts or conditions nor shall an event have taken place
     which, individually or in the aggregate, could reasonably be expected to
     have a Material Adverse Effect.

          (g)  Title to Property; Liens.
               ------------------------ 

               (i)    Each of the Borrower and its Subsidiaries has good and
          marketable title to, or a valid leasehold interest in, all of its
          properties and assets, real and personal, of any nature whatsoever,
          free and clear of all Liens, except for Liens permitted by Section
                                                                     -------
          6.2(h).  The assets and properties owned by and leased to the Borrower
          ------                                                                
          or any of its Subsidiaries which are necessary in the conduct of their
          respective businesses are in adequate operating condition and repair,
          ordinary wear and tear and damage due to casualty excepted, are free
          and clear of any known defects except such defects as do not
          substantially interfere with the continued use thereof in the conduct
          of normal operations, and are able to serve the function for which
          they are intended in the conduct of such Person's business.

               (ii)   Except to the extent set forth on Schedule 5.1(g), the
                                                        ---------------     
          Borrower and its Designated Subsidiaries are the sole and lawful
          owners of each Designated Vessel and hold valid legal title to the
          whole of such Designated Vessels.  The Borrower and its Designated
          Subsidiaries lawfully own and are lawfully possessed of each
          Designated Vessel free from any Lien, charge or encumbrance
          whatsoever, except as permitted pursuant to Section 6.2(h), and will
                                                      --------------          
          warrant and defend the title and possession thereto and to every part
          thereof for the benefit of the Lenders against the claims and demands
          of any Person whomsoever.

          (h)  No Default.  None of the Borrower or any of its Subsidiaries is
               ----------
     in violation of any Applicable Law, or in default under any agreement or
     instrument to which any of such Persons is a party or by which any of their
     respective properties or assets is bound or affected, which violation or
     default could have a Material Adverse Effect. No Event of Default or
     Default has occurred and is continuing.

                                     -33-
<PAGE>
 
          (i)  Litigation; Contingent Liabilities; Labor Matters.
               ------------------------------------------------- 

               (i)    Except as set forth in Schedule 5.1(i) or in the financial
                                             ---------------                    
          statements described in Section 5.1(f), no claims, litigation,
                                  --------------                        
          arbitration proceedings or governmental proceedings are pending or, to
          the knowledge of the Loan Parties, overtly threatened against or are
          affecting the Borrower or any of its Subsidiaries, or any of their
          respective properties, assets or revenues, the results of which could
          reasonably be expected to have a Material Adverse Effect.

               (ii)   Other than any liability incident to the claims,
          litigation or proceedings disclosed in Schedule 5.1(i), or provided
                                                 ---------------
          for or disclosed in the financial statements referred to in Section
                                                                      ------- 
          5.1(f), as of the Closing Date, neither the Borrower nor any of its
          ------
          Subsidiaries has any contingent liabilities which are material to the
          Borrower, any of its Subsidiaries or the Borrower and its Subsidiaries
          taken as a whole.

          (j)  Patents, Trademarks and Licenses.  The Borrower and each of its
               --------------------------------                               
     Subsidiaries owns or possesses all the licenses, patents, copyrights,
     trademarks, service marks, trade names, and other similar property rights
     which are reasonably necessary for the present and planned future conduct
     of its business, without conflict with the rights of any other Person with
     respect thereto, except where the failure to own or possess such property,
     or the existence of any such conflict, could not reasonably be expected to
     have a Material Adverse Effect.

          (k)  ERISA.  As to each Plan which is not a Multiemployer Plan and
               -----                                                        
     which is intended to be qualified under Section 401(a) of the IRC as
     currently in effect, either (i) such Plan has been determined by the IRS to
     be so qualified, and each trust related to such Plan has been determined to
     be exempt from federal income taxation under Section 501(a) of the IRC as
     currently in effect, (ii) an application for a determination for such Plan
     has been filed and is now pending with the IRS, or (iii) the failure of
     such Plan to be so qualified or determined to be exempt could not
     reasonably be expected to name a Material Adverse Effect.  As of the
     Closing Date, except as disclosed on Schedule 5.1(k), none of the Borrower
                                          ---------------                      
     or any of its Subsidiaries maintains or contributes to any employee welfare
     benefit plan within the meaning of Section 3(l) of ERISA which provides
     benefits to employees after termination of employment other than as
     required by Section 601 of ERISA.  None of the Borrower or any of its
     Subsidiaries or any ERISA Affiliate has failed to comply with any of the
     responsibilities, obligations or duties imposed on it by ERISA or
     regulations promulgated thereunder with respect to any Plan which failure
     could reasonably be expected to have a Material Adverse Effect.  No Benefit
     Plan has incurred any accumulated funding deficiency (as defined in
     Sections 302(a)(2) of ERISA and 412(a) of the IRC) whether or not waived.
     Except as disclosed on Schedule 5.1(k), none of the Borrower or any of its
                            ---------------                                    
     Subsidiaries or any ERISA Affiliate nor any fiduciary of any Benefit Plan
     which is not a Multiemployer Plan (i) has engaged in a nonexempt prohibited
     transaction described in Section 406 of ERISA or Section 4975 of the IRC
     which could reasonably be expected to have a Material Adverse Effect or
     (ii) has taken or failed to take 

                                     -34-
<PAGE>
 
     with respect to any Benefit Plan any action which would constitute or
     result in a Termination Event. None of the Borrower or any of its
     Subsidiaries or any ERISA Affiliate has incurred any potential liability
     under Section 4063, 4064, 4069, 4204 or 4212(c) of ERISA. None of the
     Borrower or any of its Subsidiaries or any ERISA Affiliate has incurred any
     liability to the PBGC which remains outstanding other than the payment of
     premiums, and there are no premium payments which have become due which are
     unpaid. Schedule B to the most recent annual report filed with the IRS with
     respect to each Benefit Plan and furnished to Administrative Agent is
     complete and accurate in all material respects. Since the date of each such
     Schedule B, there has been no adverse change in the funding status or
     financial condition of the Benefit Plan relating to such Schedule B which
     could reasonably be expected to have a Material Adverse Effect. Except as
     disclosed on Schedule 5.1(k), none of the Borrower or any of its
                  ---------------             
     Subsidiaries or any ERISA Affiliate has (i) failed to make a required
     contribution or payment to a Multiemployer Plan or (ii) made a complete or
     partial withdrawal under Sections 4203 or 4205 of ERISA from a
     Multiemployer Plan. None of the Borrower or any of its Subsidiaries or any
     ERISA Affiliate has failed to make a required installment or any other
     required payment under Section 412 of the IRC on or before the due date for
     such installment or other payment. None of the Borrower or any of its
     Subsidiaries or any ERISA Affiliate is required to provide security to a
     Benefit Plan under Section 401(a)(29) of the IRC due to a Plan amendment
     that results in an increase in current liability for the plan year.

          (l)  Environmental Matters.
               --------------------- 

               (i)    Except as specifically disclosed in Schedule 5.1(l), the
                                                          ---------------     
          ongoing operations of the Borrower and each of its Subsidiaries comply
          in all respects with all Environmental Laws, except to the extent that
          such noncompliance could not reasonably be expected to have a Material
          Adverse Effect.

               (ii)   Except as specifically disclosed in Schedule 5.1(l), the
                                                          ---------------     
          Borrower and each of its Subsidiaries has obtained all licenses,
          permits, authorizations and registrations required under any
          Environmental Law ("Environmental Permits") and necessary for its
                              ---------------------                        
          ordinary course operations, all such Environmental Permits are in good
          standing in all respects, and the Borrower and each of its
          Subsidiaries is in compliance with all terms and conditions of each
          such Environmental Permit, except in each case, where the failure to
          obtain, remain in good standing, or otherwise be in compliance with,
          such Environmental Permit could not reasonably be expected to have a
          Material Adverse Effect.

               (iii)  Except as specifically disclosed in Schedule 5.1(l), none
                                                          ---------------      
          of  the Borrower or any of its Subsidiaries or any of their respective
          present Property or operations is subject to any outstanding written
          order from or agreement with any Governmental Authority nor subject to
          any judicial or docketed administrative proceeding, nor has been
          notified that it is a potentially responsible party, respecting any
          Environmental Law, Environmental Claim or Hazardous Material 

                                     -35-
<PAGE>
 
          which, in any such case, could reasonably be expected to have a
          Material Adverse Effect.

               (iv)   Except as specifically disclosed in Schedule 5.1(l), there
                                                          ---------------       
          are no Hazardous Materials or other conditions or circumstances
          existing with respect to any Property, or arising from operations
          prior to the Closing Date, of the Borrower or any of its Subsidiaries
          that could reasonably be expected to give rise to Environmental Claims
          which would have a Material Adverse Effect.  To the best knowledge of
          the Loan Parties, as of the Closing Date, none of the Borrower or any
          of its Subsidiaries has any underground storage tanks (x) that are not
          properly registered or permitted under applicable Environmental Laws,
          (y) that are not in compliance with any Environmental Permits or
          Environmental Laws, or (z) with respect to which a Release has
          occurred, on or off-site.  Each of the Borrower and its Subsidiaries
          has notified all of its employees of the existence, if any, of any
          health hazard arising from the conditions of their employment of which
          the Loan Parties have knowledge in a manner consistent with all
          applicable laws and have met all notification requirements under Title
          III of CERCLA and all other Environmental Laws except where a failure
          to so notify such employees could not reasonably be expected to have a
          Material Adverse Effect.

               (v)    To the best knowledge of the Loan Parties, except as
          specifically disclosed in Schedule 5.1(1),as of the Closing Date, none
                                    ---------------                             
          of the Properties have at any time been operated as a treatment,
          storage or disposal facility.

               (vi)   To the best knowledge of the Loan Parties, except as set
          forth in Schedule 5.1(l), none of the Borrower or any of its
                   ---------------                                    
          Subsidiaries has any contingent liability in connection with (1)any
          actual, threatened, or potential spillage, disposal or release into
          the environment of, or otherwise with respect to, any Hazardous
          Material or other hazardous, toxic or dangerous waste, substance or
          constituent, or other substance, whether on any premises now or
          previously owned or occupied by the Parent or any of its Subsidiaries
          or on any other premises that could reasonably be expected to have a
          Material Adverse Effect or (2)any other unsafe or unhealthful
          condition that could reasonably be expected to have a Material Adverse
          Effect.

          (m)  Payment of Taxes.  The Borrower and its Subsidiaries have filed
               ----------------                                               
     all federal income and other federal, state and local tax returns and other
     reports as required by law, and have paid all taxes and other similar
     charges that are due and payable, after giving effect to any extensions
     therefor, except (i) such taxes, if any, that are being contested in good
     faith by appropriate proceedings and have been adequately reserved against
     in accordance with GAAP and (ii) any such returns, taxes, or charges the
     nonfiling or nonpayment of which could not be reasonably expected to have a
     Material Adverse Effect.  None of the Loan Parties has any knowledge of any
     proposed tax assessment against any of them or against any Subsidiaries of
     Borrower not constituting Loan Parties for which adequate provision has not
     been made on its accounts.  The provisions for taxes on the 

                                     -36-
<PAGE>
 
     books of the Borrower and each Subsidiary are adequate for all open years,
     and for its current fiscal period.

          (n)  Fiscal Year.  The Borrower and each Subsidiary has established a
               -----------                                                     
     Fiscal Year ending on December 31 each year.

          (o)  Governmental Regulation.  None of the Loan Parties is subject to
               -----------------------                                         
     regulation under the Interstate Commerce Act, the Investment Company Act of
     1940, the Public Utility Holding Company Act of 1935, the Federal Power Act
     or any other Applicable Law that restricts such Loan Party's ability to
     incur debt, guaranty obligations or to grant Liens, except to the extent
     that such regulation could not reasonably be expected to have a Material
     Adverse Effect.

          (p)  Margin Regulations.  None of the Borrower or any of its
               ------------------                                     
     Subsidiaries is engaged, principally or as one of its important activities,
     in the business of extending credit for the purpose of "purchasing" or
     "carrying" any "margin stock" (as each of the quoted terms is defined or
     used in Regulation T, U or X of the Board of Governors of the Federal
     Reserve System as in effect from time to time).  No part of the proceeds of
     any of the Loans and no Letter of Credit has been used for so purchasing or
     carrying margin stock or for any purpose which violates, or which would be
     inconsistent with, the provisions of Regulation T, U or X.

          (q)  Other Loan Documents.  The representations and warranties made by
               --------------------                                             
     each Loan Party contained in each Loan Document are true and correct in all
     material respects.

          (r)  Corporate Structure; Capitalization.  As of the Closing Date, a
               -----------------------------------                            
     complete and correct disclosure of each Subsidiary of the Borrower in
     existence as of the Closing Date is set forth in Schedule 5.1(r)(i),
                                                      ------------------ 
     together with the names, jurisdictions of organization, the percentage of
     shares of such Persons owned by Borrower and each other Subsidiary of the
     Borrower as of the Closing Date.  As of the Closing Date, the names and
     ownership percentages (stated both on an outstanding and fully-diluted
     basis) of each legal, record owner of each class of the issued and
     outstanding shares of capital stock of the Borrower, and of all issued and
     outstanding warrants, options, stock appreciation rights and other
     convertible interests with respect to the Borrower's capital stock, are
     completely and accurately set forth in Schedule5.1(r)(ii).  All of the
                                            ------------------             
     issued and outstanding shares of capital stock of each Subsidiary of the
     Borrower have been validly issued, are fully paid and nonassessable and are
     owned directly or indirectly by the Borrower or the other applicable
     Persons as described in Schedule5.1(r)(i), free and clear of all Liens
                             -----------------                             
     (other than Liens permitted hereunder).  No shares of capital stock of such
     Subsidiary are held as or otherwise constitute treasury stock.  No
     authorized but unissued shares of capital stock of the Borrower or any such
     Subsidiary are subject to any option, warrant, right to call, preemption
     right or other commitment of any kind whatsoever.

          (s)  Debt; Contingent Obligations; Solvency.  As of the Closing Date,
               --------------------------------------                          
     the financial statements referred to in Section 5.1(f) contain a complete
                                             --------------                   
     and accurate 

                                     -37-
<PAGE>
 
     disclosure of (i) all Debt of the Borrower and its Subsidiaries outstanding
     as of the respective dates of such financial statements and (ii) all
     material loss contingencies and other material contingent obligations of
     the Borrower and its Subsidiaries as of such dates, except for Guaranties
     disclosed on Schedule 6.2(f). As of the Closing Date, none of the Borrower
                  ---------------            
     or any of its Subsidiaries has incurred any other Debt or Guaranties since
     the respective dates of such financial statements, except as would have
     been permitted under Sections 6.2(f) and 6.2(i) of this Agreement had this
                          ---------------     ------ 
     Agreement been in effect at the time of the incurrence of any such
     additional Debt or Guaranties. As of the Closing Date, none of the Borrower
     or any of its Subsidiaries has incurred any loss contingencies or other
     contingent obligations since the respective dates of such financial
     statements which could reasonably be expected to have a Material Adverse
     Effect. The Borrower and the other Loan Parties, each individually and on a
     consolidated basis, are Solvent prior to and at all times after giving
     effect to the consummation of the Restructuring Transactions.

          (t)  Insurance.  As of the Closing Date, Schedule 5.1(t) sets forth a
               ---------                           ---------------             
     complete and accurate list of insurance policies and programs in effect
     with respect to the properties and businesses of the Borrower and its
     Subsidiaries, specifying for each such policy and program, (i) the amount
     thereof, (ii) the risks insured against thereby, (iii) the name of the
     insurer and each insured party thereunder and (iv) the policy or other
     identification number thereof.  Such insurance policies and programs are in
     such forms and amounts, and provide coverage against such risks as are
     required by Section 6.1(c) and are customary for corporations of
                 --------------                                      
     established reputation engaged in the same or a similar business and owning
     and operating similar properties.

          (u)  Collateral Documents.  The provisions of the Collateral Documents
               --------------------                                             
     executed by any Loan Party in favor of the Administrative Agent evidence
     legal, valid, enforceable and continuing Liens, in favor of the
     Administrative Agent for the benefit of the Secured Parties, in all right,
     title and interest of such Loan Party in any and all of the Collateral
     described therein, securing the Obligations from time to time outstanding,
     and upon all proper filings and recordings being duly made in the locations
     referred to in the applicable Collateral Documents or the taking of
     possession of the Collateral by the Administrative Agent in accordance with
     the provisions of such Collateral Documents, each of such Collateral
     Documents constitutes a fully perfected first priority Lien in all right,
     title and interest of such Loan Party in such Collateral superior in right
     to any Liens, existing or future, which such Loan Party or any creditors
     thereof or purchasers therefrom, or any other Person, may have against such
     Collateral or interests therein, except for Liens permitted by Section
                                                                    -------
     6.2(h).
     ------ 

          (v)  The Restructuring Transactions.  (i) (A) All conditions precedent
               ------------------------------                                   
     to, and all consents necessary to permit, the Merger pursuant to the Merger
     Agreement, the Note Issuance pursuant to the Note Indenture, the Initial
     Capital Contribution pursuant to the Capitalization Documents, and the
     restatement and amendment of the Reliance Agreement pursuant to its terms,
     have been satisfied or delivered, or waived with the prior written consent
     of the Majority Lenders, (B) no material breach of any term or provision of
     the Merger Agreement, the Note Indenture, the Reliance Agreement or the
     Capitalization 

                                     -38-
<PAGE>
 
     Documents has occurred, (C) the Merger, the Note Issuance and the Initial
     Capital Contribution each have been consummated (or are being consummated
     simultaneously with the making the initial Loans hereunder), in accordance
     with all Applicable Laws, (D) all governmental and material third party
     approvals necessary in connection with the Restructuring Transactions shall
     have been obtained and are in full force and effect, and all applicable
     waiting periods shall have expired without any action being taken or
     threatened by any Governmental Authority which would restrain, prevent or
     otherwise impose materially adverse conditions on any of the Restructuring
     Transactions and (E) no actions, suits or proceedings are pending or
     threatened with respect to any of the Restructuring Transactions or any
     Restructuring Document which the Administrative Agent or the Majority
     Lenders shall reasonably determine could reasonably be expected to have a
     Material Adverse Effect.

               (ii)   Each of the Restructuring Documents filed with the
          Securities and Exchange Commission or other securities authorities,
          including, without limitation, the offering memorandum with respect to
          the Note Issuance, complied (when filed) in all material respects with
          all applicable provisions of the 1933 Act, 1934 Act, all other federal
          securities laws, state securities or "Blue Sky" laws, foreign
          securities laws, general corporation law and all rules and regulations
          thereunder.

               (iii)  The Borrower has delivered to the Administrative Agent
          correct and complete, executed copies of each of the Restructuring
          Documents, including, without limitation, all amendments, schedules
          and exhibits thereto, and all other material agreements, documents,
          and certificates which have been executed and delivered in connection
          with the Restructuring Transactions.

          (w)  Year 2000 Compliance.  The Borrower has reviewed and assessed all
               --------------------                                             
     computer applications which are material to the Borrower's and its
     Subsidiaries' businesses with respect to the ability of such applications
     to correctly recognize references to, and abbreviations of, the year 2000
     (including, without limitation, references to "00" as the year 2000 and not
     the year 1900), and has inquired of each of its material suppliers, vendors
     and customers as to whether such Persons have so reviewed and assessed all
     computer applications, if any, relating to those aspects of such Persons'
     business which may materially affect the Borrower's and its Subsidiaries
     businesses.  The Borrower reasonably believes, as a result of such reviews,
     assessments and inquiries, that to the extent one or more of such computer
     applications of the Borrower or its Subsidiaries, or their respective
     material suppliers vendors or customers, is unable to correctly recognize
     such references to, or abbreviations of, the year 2000, that such
     deficiencies could not reasonably be expected to have a Material Adverse
     Effect.

          (x)  Accuracy of Information.  The schedules, certificates and other
               -----------------------                                        
     written statements and information furnished to the Administrative Agent,
     the Issuing Lender and the Lenders by or on behalf of any Loan Party in
     connection with the negotiation of this Agreement and the other Loan
     Documents do not contain any material misstatement of fact or omit to state
     a material fact or any fact necessary to make the statements contained

                                     -39-
<PAGE>
 
     therein not misleading.  As of the Closing Date, there is no fact currently
     known to any Loan Party which now or in the future could reasonably be
     expected to have a Material Adverse Effect and which has not been set forth
     or referred to in this Agreement, the other Loan Documents, or such
     schedules, certificates, statements or information heretofore furnished to
     the Administrative Agent.

                                   ARTICLE VI

                                   COVENANTS
                                   ---------

          SECTION 6.1.  Affirmative Covenants.  Each Loan Party which is a party
                        ---------------------                                   
hereto covenants and agrees that so long as any of the Lenders shall have any
Commitment hereunder, there shall exist any outstanding Loans, any Letter of
Credit shall remain outstanding, or any other Obligations shall remain
outstanding, unless the Majority Lenders shall otherwise give their prior
written consent:

          (a)  Corporate Existence.  The Borrower and each of its Subsidiaries
               -------------------                                            
     shall maintain its corporate existence, qualification and good standing in
     all jurisdictions in which such qualification and good standing are
     necessary in order for each such Person to conduct its business and own its
     property as presently conducted and owned in such jurisdictions (except in
     such jurisdictions where the failure to remain so qualified and in good
     standing could not reasonably be expected to have a Material Adverse
     Effect); and the Borrower and each Subsidiary shall maintain all rights,
     privileges, licenses, patents, patent rights, copyrights, trademarks, trade
     names, trade styles, franchises and other authority for the conduct of its
     respective business in the ordinary course as conducted from time to time,
     except to the extent that the failure to maintain such rights, privileges,
     licenses, patents, patent rights, copyrights, trademarks, trade names,
     trade styles, franchises and other authority would not be reasonably
     expected to have a Material Adverse Effect.

          (b)  Compliance with Laws.  The Borrower and each of its Subsidiaries
               --------------------                                            
     shall (i) comply with all Applicable Laws applicable to such Person (except
     where the failure to so comply could not reasonably be expected to have a
     Material Adverse Effect) and (ii) obtain as needed, and maintain in good
     standing, all Permits and other governmental approvals and authorizations
     necessary for its operations (except where the failure to obtain or
     maintain such Permits and approvals could not reasonably be expected to
     have a Material Adverse Effect).

          (c)  Maintenance of Properties; Insurance.
               ------------------------------------ 

               (i)    The Borrower and each of its Subsidiaries shall (A) obtain
          the consent or approval of any Person whose consent or approval is
          required in order for the Borrower or such Subsidiary to grant or keep
          effective Liens to or for the benefit of the Administrative Agent in
          any property of the Borrower or such Subsidiary intended to secure the
          Obligations; and (B) maintain in good repair, 

                                     -40-
<PAGE>
 
          working order and condition, excepting ordinary wear and tear and
          damage due to casualty, all of its material properties which are used
          in the conduct of its business (whether owned or leased by such party)
          and make or cause to be made all appropriate repairs, renewals and
          replacements thereof, in each case consistent with sound business
          practices, provided that such obligation shall not apply to property
          that the Borrower or such Subsidiary determines in good faith that
          maintenance thereof is no longer economically desirable.

               (ii)   The Borrower and its Subsidiaries shall maintain the
          following insurance policies and programs:

                      (A) physical damage insurance on all material real and
               personal property (including inventory) covering (1) for all open
               and operating facilities, repair and replacement cost of all such
               property and (2) for all closed, inactive vacant facilities, the
               actual cash value of such facilities;

                      (B) general liability insurance (including products and
               completed operations liability coverage) in an aggregate amount
               of not less than $65,000,000;

                      (C) Longshoremen and Harbor Workers insurance per
               statutory limits;

                      (D) hull and machinery insurance in an aggregate amount of
               not less than $200,000,000;

                      (E) protection and indemnity, including Masters and
               Members of Crew insurance in an aggregate amount of not less than
               $75,000,000;

                      (F) Workers compensation insurance per statutory limits;

                      (G) Wrongful draw insurance with respect to each Letter of
               Credit having an aggregate Dollar equivalent face amount in
               excess of $10,000,000 and supporting contracts to be performed in
               a country other than the United States or for a beneficiary in a
               country other than the United States in an amount equal to such
               excess, unless (1) the Borrower shall have notified the
               Administrative Agent that it has determined, in good faith, that
               such insurance with respect to such Letter of Credit is not
               available at a reasonable economic cost or not available from a
               reputable insurer and (2) the Administrative Agent shall have
               concurred with such conclusion in writing (which concurrence
               shall not be unreasonably withheld or delayed);

                      (H) insurance to protect against asset seizure with
               respect to each contract to be performed by the Borrower or its
               Subsidiaries in a country outside of the United States, in an
               amount equal to the aggregate 

                                     -41-
<PAGE>
 
               fair market value of the assets used by the Borrower and its
               Subsidiaries in fulfilling their respective obligations under
               such contract unless (1) the Borrower shall have notified the
               Administrative Agent that it has determined, in good faith, that
               such insurance with respect to such contract is not available at
               a reasonable economic cost or not available from a reputable
               insurer, or the property to be used in connection with such
               contract is not subject to a material risk of asset seizure in
               such country and (2) the Administrative Agent shall have
               concurred with such conclusion in writing (which concurrence
               shall not be unreasonably withheld or delayed); and

                      (I) such other additional insurance coverage and with
               respect to such risks as is customary for businesses similar to
               that of the Parent and its Subsidiaries.

     All such insurance shall be provided by (x) the insurers listed on Schedule
                                                                        --------
     5.1(t), (y) insurers that have an A.M. Best policy-holders rating of not
     ------                                                                  
     less than A, or if no such rating is applicable, having a quality
     comparable to those rated A or better or (z) such other insurers as the
     Administrative Agent may approve in writing, and shall contain
     endorsements, in form and substance reasonably satisfactory to the
     Administrative Agent, naming the Administrative Agent as loss payee with
     respect to each casualty insurance policy which insures any Collateral and
     as an additional insured with respect to each liability insurance policy.

               (iii)  The Borrower shall deliver or cause to be delivered to the
          Administrative Agent, on or before the Closing Date, copies of
          certificates of insurance with respect to each of the Borrower's and
          its Subsidiaries' policies of insurance described in Section 6.1(c),
                                                               -------------- 
          as in effect on the Closing Date.  In addition, the Borrower shall
          deliver to the Administrative Agent prompt written notice of any
          cancellation or reduction in the amount or coverage of any of the
          insurance policies required by this Section 6.1(c) and, in the event
                                              --------------                  
          any new or substitute policies shall be issued, the Borrower shall
          promptly request its insurers (or their agents) to deliver
          certificates evidencing such new or substitute insurance to the
          Administrative Agent.

          (d)  Notice of Litigation.  The Borrower shall deliver or cause to be
               --------------------                                            
     delivered to the Administrative Agent, promptly following the occurrence
     thereof, notice of any of the following events: (i) the institution of, or
     threat in writing of, any action, suit, proceeding, governmental
     investigation or arbitration against or affecting the Borrower or any
     Subsidiary, which (A) could reasonably be expected to have a Material
     Adverse Effect or (B) relates to any Loan Document, (ii) any development in
     any action, suit, proceeding, governmental investigation or arbitration
     already disclosed which could reasonably be expected to have a Material
     Adverse Effect and (iii) any judgment (or judgments) or money judgment (or
     judgments), writ or warrant of attachment, or similar process involving in
     excess of $5,000,000 (or $2,000,000 in the aggregate to the extent not

                                     -42-
<PAGE>
 
     covered by insurance which is confirmed in writing by the insurers or
     agents of the Borrower or Subsidiaries as covering such judgment or
     process) in the aggregate being entered or filed against any or the Loan
     Parties or any of their respective assets.

          (e)  Taxes; Claims.  The Borrower and each of its Subsidiaries shall
               -------------                                                  
     (i) promptly file all federal, state and local tax returns and other
     reports which such Person is required by law to file, (ii) maintain
     adequate reserves for the payment of all taxes, assessments, governmental
     charges, and other similar charges, and pay promptly, when due, all such
     taxes, assessments, and other charges in such manner as will not give rise
     to any Lien other than Customary Permitted Liens, (iii) promptly pay all
     other Claims (including claims for labor, services, materials and supplies)
     that have become due and payable and that by law have or may give rise to a
     Lien on such Person's property or assets, prior to the time when any
     penalty or fine may be incurred with respect thereto and otherwise in such
     manner as will not give rise to any Lien other than Customary Permitted
     Liens, and (iv) pay all trade accounts payable in accordance with usual and
     customary business terms; provided that neither the Borrower nor any of its
                               --------                                         
     Subsidiaries shall be required to pay any such tax, assessment, charge,
     claim or account which (x) (1) is being contested in good faith by
     appropriate proceedings which will prevent the forfeiture or sale of any
     Property or any material interference with the use thereof by such Person,
     and (2) has been adequately reserved against in accordance with GAAP or (y)
     if not so paid, could not reasonably be expected to have a Material Adverse
     Effect.

          (f)  ERISA Notices.  The Borrower shall deliver or cause to be
               -------------                                            
     delivered to the Administrative Agent, at the Borrower's expense, the
     following information and notices as soon as possible, and in any event:

               (i)    within ten (10) Business Days after any Loan Party or any
          ERISA Affiliate knows that a Termination Event has occurred, a written
          statement of the chief financial officer of the Borrower describing
          such Termination Event and the action, if any, which the Borrower or
          any of its Subsidiaries or ERISA Affiliate has taken, is taking or
          proposes to take with respect thereto, and when known, any action
          taken or threatened by the IRS, DOL or PBGC with respect thereto;

               (ii)   within ten (10) Business Days after any Loan Party or any
          ERISA Affiliate knows that a prohibited transaction (defined in
          Sections 406 of ERISA and 4975 of the IRC) has occurred which could
          reasonably be expected to result in liabilities to the Borrower and
          its Subsidiaries in excess of $2,000,000, a statement of the chief
          financial officer of the Borrower describing such transaction and the
          action which the Borrower and its Subsidiaries or ERISA Affiliate has
          taken, is taking or proposes to take with respect thereto;

               (iii)  within ten (10) Business Days after the filing thereof
          with the IRS, a copy of each funding waiver request filed with respect
          to any Benefit Plan and all communications received by the Borrower or
          any of its Subsidiaries or any ERISA Affiliate with respect to such
          request;

                                     -43-
<PAGE>
 
               (iv)   within ten (10) Business Days after receipt by the
          Borrower or any of its Subsidiaries or any ERISA Affiliate of the
          PBGC's intention to terminate a Benefit Plan or to have a trustee
          appointed to administer a Benefit Plan in either case in a distress
          termination under Section 4041(c) of ERISA, copies of each such
          notice;

               (v)    within ten (10) Business Days after receipt by the Parent
          or any of its Subsidiaries or any ERISA Affiliate of any unfavorable
          determination letter from the IRS regarding the qualification of a
          Plan under Section 401(a) of the IRC which could reasonably be
          expected to result in liabilities to the Borrower and its Subsidiaries
          in excess of $2,000,000, copies of each such letter;

               (vi)   within ten (10) Business Days after the receipt by the
          Borrower or any of its Subsidiaries or any ERISA Affiliate of a notice
          from a Multiemployer Plan regarding the imposition of withdrawal
          liability which could reasonably be expected to result in liabilities
          to the Borrower and its Subsidiaries in excess of $2,000,000, copies
          of each such notice;

               (vii)  within ten (10) Business Days after the Parent or any of
          its Subsidiaries or any ERISA Affiliate fails to make a required
          installment or any other required payment under Section 412 of the IRC
          on or before the due date for such installment or payment which could
          reasonably be expected to result in the imposition of a Lien under
          Section 412(n) of the IRC, a notification of such failure; and

               (viii) within ten (10) Business Days after the Borrower or any
          of its Subsidiaries or any ERISA Affiliate knows (A) a Multiemployer
          Plan has been terminated, (B) the administrator or plan sponsor of a
          Multiemployer Plan intends to terminate a Multiemployer Plan, or (C)
          the PBGC has instituted or will institute proceedings under Section
          4042 of ERISA to terminate a Multiemployer Plan which, in any such
          case, could reasonably be expected to result in liabilities to the
          Borrower and its Subsidiaries in excess of $2,000,000, a notification
          of such event or fact.

For purposes of this Section 6.1(f), any Loan Party and any ERISA Affiliate
                     --------------                                        
shall be deemed to know all facts known by the administrator of any Plan of
which such Loan Party or such ERISA Affiliate is the plan sponsor.

          (g)  ERISA Compliance.  The Borrower and each of its Subsidiaries
               ----------------                                            
     shall, and shall cause each ERISA Affiliate to, establish, maintain and
     operate all Plans to comply in all respects with the provisions of ERISA,
     IRC, and all other applicable laws, and the regulations and interpretations
     thereunder except to the extent such noncompliance could not reasonably be
     expected to have a Material Adverse Effect.

                                     -44-
<PAGE>
 
          (h)  Patents, Trademarks and Licenses.  The Borrower and each of its
               --------------------------------                               
     Subsidiaries shall obtain and maintain adequate licenses, patents,
     copyrights, trademarks, service marks, trade names, and other similar
     property rights to conduct its business as currently conducted, except
     where the failure to obtain or maintain such property rights could not
     reasonably be expected to have a Material Adverse Effect.

          (i)  Notice of Labor Disputes.  The Borrower shall notify the
               ------------------------                                
     Administrative Agent as soon as possible and in any event within three (3)
     days, following (A) the Borrower's learning of any labor dispute to which
     the Borrower or any of its Subsidiaries is likely to become a party, any
     strikes or walkouts, or threatened strikes or walkouts, relating to any of
     its plants or other facilities, and (B) the expiration or termination of
     any labor contract to which the Borrower or any of its Subsidiaries is a
     party or by which the Borrower or any of its Subsidiaries is bound (other
     than an expiration or termination of a labor contract which has been
     replaced by a new labor contract or an extension of an existing labor
     contract), which, in any case under clause (A) or (B) hereof, could
                                         ----------    ---              
     reasonably be expected to have a Material Adverse Effect.

          (j)  Notice of Default.  The Borrower shall promptly notify the
               -----------------                                         
     Administrative Agent, (i) of any condition or event that constitutes a
     Default or an Event of Default and (ii) of any other default under any
     contractual obligation to which the Borrower or any of its Subsidiaries is
     a party or by which any of them or their respective properties may be bound
     (which default could reasonably be expected to have a Material Adverse
     Effect), such notice to specify the nature and period of existence of any
     such condition, event, or default and what action the Borrower or such
     Subsidiary, as applicable, has taken, is taking or proposes to take with
     respect thereto.

          (k)  Environmental Notices.  The Borrower shall notify the
               ---------------------                                
     Administrative Agent in writing, promptly upon, but in no event later than
     ten (10) days after, becoming aware of any of the following which could
     reasonably be expected to result in liabilities or expenses of the Borrower
     and the Subsidiaries in excess of $3,000,000: (i) any and all enforcement,
     cleanup, removal or other governmental or regulatory actions instituted,
     completed or threatened against the Parent or any of its Subsidiaries or
     any of their respective Properties pursuant to any applicable Environmental
     Laws; (ii) all other Environmental Claims; (iii) any environmental or
     similar condition on any real property adjoining or in the vicinity of the
     Property of the Borrower or any of its Subsidiaries that could reasonably
     be anticipated to cause such Property or any part thereof to be subject to
     any restrictions on the ownership, occupancy, transferability or use of
     such property under any Environmental Laws; (iv) new and material changes
     to any existing Environmental Law; and (v) any filing or report made by the
     Borrower or any of its Subsidiaries with any Governmental Authority with
     respect to (A) the violation of any Environmental Law, (B) any unpermitted
     Release or threatened Release of a Contaminant that is reportable under 40
     C.F.R. 302 or (C) any unsafe or unhealthful condition at any Property of
     the Borrower or any of its Subsidiaries.

                                     -45-
<PAGE>
 
          (l)  Environmental Laws.
               ------------------ 

               (i)      The Borrower and each of its Subsidiaries shall conduct
          its operations and keep and maintain its Property in compliance with
          all Environmental Laws, and will obtain, maintain in good order, and
          comply in all material respects with, all Environmental Permits and
          registrations, except to the extent any such noncompliance, or failure
          to obtain, or maintain such Environmental Permits or registrations,
          could not reasonably be expected to have a Material Adverse Effect.

               (ii)     Upon the written request of the Administrative Agent,
          the Loan Parties shall submit to the Administrative Agent with
          sufficient copies for each Lender, at the Loan Parties' sole cost and
          expense, at reasonable intervals, a report providing an update of the
          status of any environmental, health or safety compliance, hazard or
          liability issue identified in any notice or report required pursuant
          to Section 6.1(k), that could, individually or in the aggregate,
             --------------
          result in liability in excess of $3,000,000.

          (m)  Books, Records and Inspections.  The Parent and each of its
               ------------------------------                             
     Subsidiaries shall keep proper books of record and account (including
     records relating to the Collateral) which accurately reflect all of its
     business affairs and transactions in relation to its business and
     activities.  The Borrower and each of its Subsidiaries shall permit
     officers and designated representatives of the Administrative Agent and, if
     accompanied by the Administrative Agent, each Lender, to visit and inspect
     any of the properties and operations of the Borrower and its Subsidiaries,
     and to examine the books of account and other documents of the Borrower and
     its Subsidiaries and (at the expense of the Loan Parties) make copies
     thereof and discuss the affairs, finances and accounts of the Parent and
     its Subsidiaries with, and be advised as to the same by, its and their
     officers and to interview any of the employees, representatives or agents
     of the Borrower and its Subsidiaries regarding environmental compliance,
     hazard or liability, and its independent auditors, and each Loan Party
     hereby authorizes its independent auditors to discuss such financial
     matters with the Administrative Agent or any representative thereof, in
     each such case, at such reasonable times and intervals, upon reasonable
     notice and to such reasonable extent as the Administrative Agent may
     desire; provided, however, that, following the occurrence and during the
             --------  -------                                               
     continuation of an Event of Default, the rights of the Administrative Agent
     and the Lenders may be exercised at any time, with any frequency upon
     reasonable notice.  The Loan Parties agree to pay the reasonable fees of
     the Administrative Agent's auditors incurred in connection with any
     reasonable exercise of the rights of the Administrative Agent pursuant to
     this section.

          (n)  Bonding Agreement; Employment Agreements.  The Borrower will take
               ----------------------------------------                         
     all action necessary to maintain the Bonding Agreement in full force and
     effect and will promptly notify the Administrative Agent of any supplement,
     replacement or amendment thereof.  The Borrower will promptly notify the
     Administrative Agent of any extension, 

                                     -46-
<PAGE>
 
     termination or non-renewal of any of the Employment Agreements or of any
     amendment to any of the material terms thereof.

          (o)  Foreign Exchange Hedging.  Prior to the Borrower or any of its
               ------------------------                                      
     Subsidiaries entering into any contract or series of contacts under which
     the amounts payable to it are payable in whole or in part in the currency
     of any country other than the United States (a "Foreign Currency Contract")
                                                     -------------------------  
     and the amount payable thereunder, when aggregated with the amounts payable
     under all other Foreign Currency Contracts for such country, exceeds
     $20,000,000 (on a Dollar equivalent basis), net of the amounts thereafter
     payable by the Borrower and its Subsidiaries in the currency of such
     country (on a Dollar equivalent basis) for related services or products,
     whether under subcontracts or otherwise, as estimated by the Borrower in
     good faith and with notice to the Administrative Agent prior to the
     Borrower's or such Subsidiary's entering into such Foreign Currency
     Contract, and if foreign exchange hedging arrangements are available from a
     reputable financial institution or through a contract traded on a reputable
     exchange at a reasonable economic cost, the Borrower or such Subsidiary
     shall obtain foreign currency hedging arrangements satisfactory in form and
     substance to the Administrative Agent with respect to the amounts payable
     under all such Foreign Currency Contracts involving such country.  For
     purposes of this Section 6.1(o), a foreign exchange hedging arrangement
                      --------------                                        
     with respect to any currency shall be presumed to be available from a
     reputable financial institution or through a contract traded on a reputable
     exchange at a reasonable economic cost, unless (A) the Borrower shall
     notify the Administrative Agent that it has determined, in good faith, that
     such a foreign exchange hedging arrangement with respect to such currency
     is not so available and (B) the Administrative Agent shall have concurred
     with such conclusion in writing (which concurrence shall not be
     unreasonably withheld or delayed).

          (p)  Future Subsidiaries.  Upon any Person becoming, after the Closing
               -------------------                                              
     Date, a Subsidiary of the Borrower, or upon the Borrower or any Subsidiary
     of the Borrower acquiring additional capital stock of, or partnership,
     ownership or similar equity interest in, any existing Subsidiary (other
     than Subsidiaries of NATCO or North American Trailing Company), the
     Borrower shall notify the Administrative Agent of such event, and, unless
     such Subsidiary is organized in a jurisdiction outside the United States of
     America or otherwise agreed to between the Borrower and the Administrative
     Agent, (i) such Person shall execute a Subsidiary Guaranty in substantially
     the form of the other Subsidiary Guaranties then in existence and otherwise
     in form and substance reasonably satisfactory to the Administrative Agent
     (but only to the extent not prohibited by the Bonding Agreement or the
     Intercreditor Agreement, each as in effect on the Closing Date); and (ii)
     to the extent such Person executes a Subsidiary Guaranty, such Person shall
     become a party to the Contribution Agreement in a manner satisfactory to
     the Administrative Agent, together, in each case, with such opinions of
     legal counsel, in form and substance reasonably satisfactory to the
     Administrative Agent, as the Administrative Agent may reasonably require
     relating to such Subsidiary Guaranty and the Contribution Agreement.

                                     -47-
<PAGE>
 
          (q)  Further Assurances.  Each Loan Party agrees that, until all
               ------------------                                         
     Obligations have been indefeasibly paid and fully satisfied and the
     Commitments have been terminated, the Administrative Agent's security
     interests in and Liens on and against the Collateral, and all proceeds
     thereof, shall, subject to Section 8.10, continue in full force and effect.
                                ------------      
     Each Loan Party shall perform, from time to time, any and all steps
     reasonably requested by the Administrative Agent to perfect, maintain and
     protect the Administrative Agent's security interests in and Liens on and
     against the Collateral granted or purported to be granted by the Collateral
     Documents, as well as the priority of such security interests and Liens, or
     to enable the Administrative Agent to exercise its rights and remedies
     hereunder with respect to any Collateral, including (i) executing and
     filing ship mortgages, financing or continuation statements, or amendments
     thereof, and terminations of ship mortgages, financing statements and other
     releases, in form and substance reasonably satisfactory to the
     Administrative Agent, (ii) delivering to the Administrative Agent all
     certificates representing or evidencing the Collateral duly endorsed and
     accompanied by duly executed instruments of transfer or assignment,
     including stock powers, all in form and substance reasonably satisfactory
     to the Administrative Agent, and (iii) executing and delivering all further
     instruments and documents, and taking all further action, as the
     Administrative Agent may reasonably request.

          SECTION 6.2.    Negative Covenants.  Each Loan Party which is a party
                          ------------------                                   
hereto covenants and agrees that so long as any of the Lenders shall have any
Commitment hereunder, there shall exist any outstanding Loans, any Letter of
Credit shall remain outstanding, or any other Obligations shall remain
outstanding, unless the Majority Lenders shall otherwise give their prior
written consent:

          (a)  Consolidation, Mergers and Acquisitions.  None of the Borrower or
               ---------------------------------------                          
     any of its Subsidiaries shall liquidate or dissolve, consolidate with, or
     merge into or with, any other corporation or Person, or purchase or
     otherwise acquire all or substantially all of the assets of any Person (or
     of any division thereof) except:

               (i)    any Subsidiary of the Borrower may liquidate or dissolve
          voluntarily into, and may merge with and into, the Borrower or any
          Designated Subsidiary, and the assets or stock of the Borrower or any
          of the Borrower's Subsidiaries may be purchased or otherwise acquired
          by the Borrower or any Designated Subsidiary, as the case may be; and

               (ii)   Permitted Business Acquisitions, if permitted (without
          duplication) by Section 6.3(a) to be made as a Capital Expenditure.
                          --------------                                     

          (b)  Investments.  None of the Borrower or any of its Subsidiaries
               -----------                                                  
     shall make any Investments, except:

               (i)    Investments existing on the Closing Date, as set forth on
                                                                            
          Schedule 6.2(b)(i);
          ------------------ 


                                     -48-
<PAGE>
 
               (ii)   Investments that, when made constituted Customary
          Permitted Investments;

               (iii)  without duplication, Investments permitted as Debt
          pursuant to Section 6.2(i) and Investments permitted as Guaranties
                      --------------                                        
          under Section 6.2(f);
                -------------- 

               (iv)   without duplication, Investments permitted as Capital
          Expenditures pursuant to Section 6.3(a);
                                   -------------- 

               (v)    without duplication, Permitted Business Acquisitions
          permitted as Capital Expenditures pursuant to Section 6.2(a);
                                                        -------------- 

               (vi)   (A) loans and advances to employees of the Borrower and
          its Subsidiaries not to exceed $1,000,000 at any time outstanding to
          any one employee and not to exceed $2,500,000 in the aggregate at any
          time outstanding, (B) advances of payroll payments and expenses to
          employees in the ordinary course of business and (C) loans by the
          Borrower to certain of its officers pursuant to Section 2.1 of the
          Merger Agreement which are repaid in full in cash (or by setoff) as of
          the Closing Date; provided, however, that, once made, loans and
                            --------  -------                            
          advances made pursuant to this clause (vi) shall be deemed to remain
                                         -----------                          
          outstanding except to the extent such loans or advances are repaid in
          cash without discount;

               (vii)  accounts receivable arising and trade credit granted in
          the ordinary course of business and any securities received in
          satisfaction or partial satisfaction thereof from financially troubled
          account debtors to the extent reasonably necessary in order to prevent
          or limit loss, which securities shall not be greater than $2,500,000
          in the aggregate;

               (viii) (A) Investments by the Borrower in Designated Subsidiaries
          and Investments by any Subsidiary of the Borrower in the Borrower or
          any Designated Subsidiary, and (B) Investments (other than in the form
          of transfers of Collateral) by the Borrower in NATCO, North American
          Trailing Company or other Subsidiaries of the Borrower which are not
          Designated Subsidiaries, and Investments (other than in the form of
          transfers of Collateral) by any Subsidiary of the Borrower in NATCO,
          North American Trailing Company or other Subsidiaries of the Borrower
          which are not Designated Subsidiaries, provided that, in the case of
          this clause (B), the aggregate amount of such Investments made on and
               ----------
          after the date hereof shall not exceed $15,000,000;

               (ix)   Investments made in connection with the receipt by the
          Borrower or any of its Subsidiaries of consideration other than cash
          for the sale by the Borrower or such Subsidiary of any assets
          permitted to be sold under clause (a) or (c) of the definition of
                                     ----------    ---                     
          Permitted Disposition;

                                     -49-
<PAGE>
 
               (x)    Investments in joint ventures or partnerships organized
          and maintained for specific single projects, provided that the amount
          of such Investments made and maintained does not at any time exceed
          $20,000,000;

               (xi)   [Intentionally Omitted]; and

               (xii)  other Investments in an aggregate amount at any one time
          not to exceed $10,000,000; provided, however, that, once made,
                                     --------  -------                  
          Investments made pursuant to this clause (xii) shall be deemed to
                                            ------------                   
          remain outstanding except to the extent such Investment is repaid or
          otherwise returned in cash or in kind (in reasonably equivalent
          value), without discount.


For purposes of this Section 6.2(b), at the time when a Person becomes a
                     --------------                                     
Subsidiary, all Investments of such Person shall be deemed to have been made by
such Person at such time.

          (c)  Restricted Payments. The Borrower shall not, and shall not permit
               ------------------- 
     any of its Subsidiaries to, declare, pay or make, or offer to pay or make
     any Restricted Payment (directly or indirectly through any Affiliate)
     except that (i) the Borrower may repurchase, redeem or otherwise acquire
     shares of, or options to purchase, capital stock of the Borrower or stock
     appreciation rights from directors, officers and employees (or their legal
     representatives or heirs, as the case may be) of the Borrower or any
     Subsidiary of the Borrower whose employment has terminated or who has died
     or retired or become disabled, or who has suffered some other hardship and
     with respect to whom the Board of Directors of the Borrower has otherwise
     determined to make such a repurchase, redemption or other acquisition in
     light of such hardship (provided that in the case of such other payments
     subject to such determination, the aggregate amount of Restricted Payments
     does not exceed $250,000 in any Fiscal Year, and provided further that the
     aggregate amount of all such repurchases, redemptions and other
     acquisitions shall not exceed $5,000,000 in the aggregate after the date
     hereof), or upon the vesting of stock appreciation rights; (ii) payments
     required to be made pursuant to the terms of the Merger Agreement or
     pursuant to the Shareholders Agreement; (iii) redemption payments, and
     related payments of accrued interest and "Liquidated Damages" (as defined
     in the Note Indenture) made in accordance with Section 3.07(b) of the Note
     Indenture and not exceeding fifty percent (50%) of the Net Cash Proceeds
     with respect to the "Public Equity Offering" (as defined therein) giving
     rise to such payments; and (iv) any Subsidiary of the Borrower may make
     Restricted Payments to its equity holders; provided that no Default  or
                                                --------                   
     Event of Default exists immediately prior to any Restricted Payment
     otherwise permitted by this Section 6.2(c) or would result therefrom.
                                 --------------                           

          (d)  Transactions with Affiliates. None of the Borrower or any of its
               ----------------------------                                    
     Subsidiaries shall enter into, or cause, suffer or permit to exist any
     arrangement or contract with any of its other Affiliates unless such
     arrangement or contract is fair and equitable to Borrower or such
     Subsidiary and is an arrangement or contract of the kind which would be
     entered into by a prudent Person in the position of Borrower or such
     Subsidiary with a Person which is not one of its Affiliates; provided,
     however, that nothing 

                                     -50-
<PAGE>
 
     in this Section 6.2(d) shall prohibit any transactions permitted hereby
             --------------
     among any of the Borrower, NATCO, North American Trailing Company and any
     of the Designated Subsidiaries.

          (e)  Negative Pledges, etc.  None of the Borrower or any of it
               ---------------------                                    
     Subsidiaries shall enter into any agreement prohibiting (i) the creation or
     assumption of any Lien upon its properties, revenues or assets, whether now
     owned or hereafter acquired; (ii) the ability of the Borrower or any such
     Subsidiary to amend or otherwise modify this Agreement or any other Loan
     Document; or (iii) the ability of any of the Borrower's Subsidiaries to
     make any payments, directly or indirectly, to the Borrower by way of
     dividends, advances, repayments of loans or advances, reimbursements of
     management and other intercompany charges, expenses and accruals or other
     returns on investments, or any other agreement or arrangement which
     restricts the ability of any such Subsidiary to make any payment, directly
     or indirectly, to the Borrower other than (A) this Agreement and each Loan
     Document; (B) agreements existing as of the Closing Date and identified in
     Schedule 6.2(e); (C) agreements governing Debt permitted by clause (ii) of
     ---------------                                             -----------   
     Section 6.2(i) as in effect on the Closing Date, which agreements shall be
     --------------                                                            
     in form and substance reasonably acceptable to the Administrative Agent;
     (D) agreements governing Debt permitted by clause (v) of Section 6.2(i),
                                                ----------    -------------- 
     with any such restrictions being applicable solely to the assets financed
     with the proceeds of such Debt; and (E) the Bonding Agreement, the
     Intercreditor Agreement and the Note Indenture.

          (f)  Guaranties. None of the Borrower or any of its Subsidiaries shall
               ----------
     create or become or be liable, whether directly or indirectly, with respect
     to any Guaranty, except that the Borrower or any such Subsidiary may incur
     (i) Guaranties for the benefit of the Borrower or any such Subsidiary if
     the primary obligation is permitted by this Agreement, (ii) an unsecured
     Guaranty by GLI of Debt not exceeding $10,000,000 in aggregate outstanding
     principal amount owing by Amboy Aggregates to Summit Bank, and each
     replacement, refinancing and renewal of such Guaranty or guaranteed Debt
     which does not increase such Debt or the amount guaranteed thereunder,
     (iii) Guaranties existing on the Closing Date and described in 
     Schedule 6.2(f) hereto, and the replacement, refinancing and renewal of
     ---------------
     each such Guaranty which does not increase the amount guaranteed
     thereunder, (iv) Guaranties of Debt arising under the Bonding Agreement,
     (v) Guaranties of the Note Indenture Obligations by Subsidiary Guarantors
     and (vi) unsecured Guaranties of Debt which, when combined (without
     duplication) with all unsecured Debt incurred and permitted under clause
                                                                       ------ 
     (xiv) of Section 6.2(i), do not exceed $5,000,000 at any time outstanding.
     -----    --------------
     Notwithstanding the foregoing, no such Guaranty shall be permitted unless
     after the incurrence of any such Guaranty, there would exist no Default or
     Event of Default.

          (g)  Sales of Assets.  None of the Borrower or any of its Subsidiaries
               ---------------                                                  
     shall sell, assign, transfer, lease, convey or otherwise dispose of any
     properties or assets (including accounts receivable and capital stock or
     other equity of Subsidiaries), whether now owned or hereafter acquired, or
     any income or profits therefrom, or enter into any agreement or grant any
     right or option to do so, in one transaction or a series of transactions,
     unless 

                                     -51-
<PAGE>
 
     such transaction or arrangement (i) constitutes a Permitted Disposition,
     (ii) consists of a transfer of property among the Borrower and its
     Subsidiaries permitted under Section 6.2(a) or transfers of property
                                  --------------
     permitted as Investments under Section 6.2(b), (iii) [intentionally
                                    --------------
     omitted], or (iv) consists of the lease of equipment (including vessels) by
     the Borrower or any Subsidiary to Persons which are not Affiliates (other
     than the Borrower or any Subsidiaries of the Borrower) in the ordinary
     course of business for a term not exceeding nine (9) months.

          (h)  Liens, etc.  None of the Parent or any of its Subsidiaries shall
               ----------                                                      
     create, incur, assume or permit to exist, whether directly or indirectly,
     any Lien on or with respect to the Borrower's or such Subsidiary's
     properties and assets, whether now or hereafter acquired or upon any income
     or profits therefrom, except:

               (i)    Liens granted pursuant to the Loan Documents;

               (ii)   Customary Permitted Liens;

               (iii)  Liens existing on the Closing Date and disclosed on
          Schedule 5.1(g);
          --------------- 

               (iv)   Liens securing payment of Debt permitted and described in
          clause (viii) of Section 6.2(i);
          -------------    -------------- 

               (v)    Liens securing payment of Debt permitted and described in
          clause (v) of Section 6.2(i) and covering only those assets acquired,
          ----------    --------------                                         
          constructed or improved in whole or in part with the proceeds of such
          Debt;

               (vi)   existing Liens on property (other than Collateral) pledged
          as collateral for liabilities assumed by the Borrower or any
          Subsidiary of the Borrower in connection with any merger or
          acquisition permitted by Section 6.2(a) (provided that such
                                   --------------  --------          
          liabilities were not incurred in anticipation of, or to finance, any
          such merger or acquisition);

               (vii)  Liens granted to sureties under the Bonding Agreement, to
          the extent permitted by the Intercreditor Agreement;

               (viii) Liens on any property or assets used by the Borrower or
          any Subsidiary in the ordinary course of business and not constituting
          Collateral, provided that such Liens existed prior to the acquisition
          thereof by the Borrower or such Subsidiary and were not created in
          contemplation of such acquisition;

               (ix)   Liens securing Obligations under any Rate Protection
          Agreement, provided that such Lien is granted in favor of a Secured
          Party;

               (x)    leases or subleases (including bareboat charters) of
          Property other than Collateral by the Borrower or any of its
          Subsidiaries as lessor or sublessor, 

                                     -52-
<PAGE>
 
          provided that such leases and subleases do not interfere in any
          material respect with the businesses of the Borrower and its
          Subsidiaries, and are not otherwise prohibited under the other terms
          of this Agreement, and leases or subleases (including bareboat
          charters) of Property constituting Collateral, provided that such
          leases and subleases do not interfere in any material respect with the
          businesses of the Borrower and its Subsidiaries, are not otherwise
          prohibited under the other terms of this Agreement, are made in the
          ordinary course of business and for a term not exceeding nine (9)
          months, and are expressly subordinated to the Liens contemplated
          hereby in favor of the Administrative Agent, for the benefit of the
          Secured Parties; and

               (xi)   renewals or replacements of any of the foregoing, provided
          that such renewed or replaced Lien does not extend to property other
          than that which was encumbered by the originally permitted Lien
          hereunder;


provided, however, that notwithstanding the foregoing, in no event shall any
- --------  -------                                                           
contractual Liens be permitted to exist on any common stock of or other equity
interests in any of the Borrower's Subsidiaries which is owned by the Borrower
or any of its Subsidiaries.

          (i)  Debt.  None of the Borrower or any of its Subsidiaries shall
               ----                                                        
     create, incur, assume or otherwise become or remain liable with respect to
     any Debt, other than, without duplication, the following:

               (i)    Debt in respect of the Loans and other Obligations;

               (ii)   Debt, including Debt in respect of Guaranties, existing on
          the Closing Date, as set forth on Schedule 6.2(i), and (except as may
                                            ---------------                    
          otherwise be restricted by Sections 6.2(c) or 6.2(o)) any renewal,
                                     ---------------    -------             
          extension, refinancing or replacement thereof so long as (A) the terms
          of any such renewal, extension, refinancing or replacement are not
          materially less favorable to such Loan Party than the original Debt,
          (B) the then aggregate outstanding amount of such Debt at the time of
          such renewal, extension, refinancing or replacement, as the case may
          be, is not increased and (C) the average life to maturity of such Debt
          at the time of such renewal, extension, refinancing or replacement, as
          the case may be, is not decreased thereby;

               (iii)  unsecured Debt incurred in the ordinary course of business
          of the Borrower and its Subsidiaries in the nature of open accounts
          (extended by suppliers on normal trade terms in connection with
          purchases of goods and services), accrued liabilities and deferred
          income, taxes and judgments or orders for the payment of money to the
          extent such judgments or orders do not result in any Event of Default
          or result in any Liens prohibited by Section 6.2(h);
                                               -------------- 

               (iv)   unsecured Debt of the Borrower or any of its Subsidiaries
          owing to one another, provided that all such Debt owing to the
          Borrower or to any 

                                     -53-
<PAGE>
 
          Subsidiary Guarantor shall be subordinated to the Obligations in a
          manner reasonably satisfactory to the Administrative Agent and
          evidenced by one or more promissory notes, in form and substance
          reasonably acceptable to the Administrative Agent, which promissory
          notes shall be pledged to the Administrative Agent pursuant to the
          Note Pledge Agreement;

               (v)    Capitalized Rentals (to the extent permitted by Sections
                                                                      --------
          6.2(n) and 6.3(b)) or purchase money Debt incurred by the Borrower or
          ------     ------                                                    
          any of its Subsidiaries to any Person to finance the acquisition,
          construction or improvement of assets permitted to be acquired,
          constructed or improved pursuant to Section 6.3(a), including any such
                                              --------------                    
          Debt incurred after the acquisition, construction or improvement of
          such assets, so long as, in each case, the amount of such Debt does
          not exceed 100% and is not less than 50% of the purchase price,
          construction cost or improvement cost of the assets acquired,
          constructed or improved with the proceeds thereof and, in the case of
          Debt incurred after the acquisition, construction or improvement of
          the assets to be financed, such Debt is incurred no later than twelve
          calendar months after such assets are acquired, constructed or
          improved;

               (vi)   Debt incurred in connection with any Rate Protection
          Agreement;

               (vii)  Debt of Subsidiaries of the Borrower which represents the
          assumption by such Subsidiaries of Debt of another Subsidiary of the
          Borrower in connection with the merger of such other Subsidiary with
          and into the assuming Subsidiary or the purchase of all or
          substantially all the assets of such other Subsidiary;

               (viii) Debt (contingent or otherwise) for the reimbursement of
          the surety or sureties which issue (A) license, bid, performance and
          lien, and payment bonds under the Bonding Agreement for amounts
          expended by them in the performance of such bonds, and (B) bonds
          issued pursuant to the Bonding Agreement with respect to projects in a
          country other than the United States which are used to obtain letters
          of credit, financial guaranties or other bonds under which the Parent
          or a Subsidiary of the Parent is the primary obligor provided that,
                                                               -------- ---- 
          the aggregate amount of the Debt permitted by this subclause (B) shall
          not exceed $25,000,000 at any time outstanding;

               (ix)   Guaranties permitted under Section 6.2(f);
                                                 -------------- 

               (x)    [Intentionally Omitted];

               (xi)   Debt constituting Note Indenture Obligations pursuant to
          the terms of the Note Indenture, in an aggregate principal amount not
          to exceed $115,000,000;


                                     -54-
<PAGE>
 
               (xii)  Indebtedness in respect of taxes, assessments,
          governmental charges and claims for labor, materials or supplies, to
          the extent that payment thereof is not required pursuant to Section
                                                                      -------
          6.1(e);
          ------ 

               (xiii) all premiums (if any), interest (including post-petition
          interest), fees, expenses, indemnities, charges and additional or
          contingent interest on obligations described in clauses (i) through
                                                          -----------        
          (xiv) of this Section 6.2(i); and
          -----         --------------     

               (xiv)  other unsecured Debt of the Borrower and its Subsidiaries
          which when combined (without duplication) with all unsecured
          Guaranties incurred and permitted under clause (vi) of Section 6.2(f),
                                                  -----------    -------------- 
          does not exceed $5,000,000 at any time outstanding.


Any Person which becomes a Subsidiary after the Closing Date shall for all
purposes of this Section 6.2(i) be deemed to have created, assumed or incurred,
                 --------------                                                
at the time it becomes a Subsidiary, all Debt of such Person existing
immediately after it becomes a Subsidiary.

          (j)  ERISA. None of the Borrower or any of its Subsidiaries shall: (i)
               -----
     engage, nor shall the Borrower or any of its Subsidiaries permit any ERISA
     Affiliate to engage, in any prohibited transaction described in Section 406
     of ERISA or Section 4975 of the IRC for which a statutory or class
     exemption is not available or a private exemption has not been previously
     obtained from the DOL; (ii) permit to exist any accumulated funding
     deficiency (as defined in Section 302 of ERISA and Section 412 of the IRC),
     whether or not waived; (iii) fail, or permit any ERISA Affiliate to fail,
     to pay timely required contributions or annual installments due with
     respect to any waived funding deficiency to any Benefit Plan; (iv)
     terminate, or permit any ERISA Affiliate to terminate, any Benefit Plan
     which would result in any liability of the Borrower or any ERISA Affiliate,
     or the imposition of any Lien on their respective property, under Title IV
     of ERISA; (v) fail to make any contribution or payment to any Multiemployer
     Plan which the Borrower or any ERISA Affiliate is required to make under
     any agreement relating to such Multiemployer Plan, or any law pertaining
     thereto; (vi) fail, or permit any ERISA Affiliate to fail, to pay any
     required installment or any other payment required under Section 412 of the
     IRC on or before the due date for such installment or other payment; or
     (vii) amend, or permit any ERISA Affiliate to amend, a Plan resulting in an
     increase in current liability for the plan year such that the Borrower or
     any ERISA Affiliate is required to provide security to such Plan under
     Section 401(a)(29) of the IRC; provided, however, that no act, omission or
                                    --------  -------                          
     event specified in clause (i) through (vii) shall be considered a violation
                        ----------         -----                                
     of this Section 6.2(j) unless such act, omission or event could reasonably
             --------------                                                    
     be expected to have a Material Adverse Effect.

          (k)  Conduct of Business. The Borrower shall not, and shall not permit
               -------------------
     any of its Subsidiaries to, engage in any business other than (i) the
     businesses of dredging, aggregate mining and supply, towing services,
     marine construction and dredging reclamation activities and (ii) any
     businesses or activities substantially related or incidental thereto.


                                     -55-
<PAGE>
 
          (l)  Sales and Leasebacks. Except for transactions described in clause
               --------------------                                       ------
(b) of the definition of Permitted Disposition, none of the Parent or any of its
- ---
Subsidiaries shall become liable, directly or by way of any Guaranties, with
respect to any lease of any property (whether real or personal or mixed) whether
now owned or hereafter acquired, (i) which any Loan Party has sold or
transferred or is to sell or transfer to any other Person, or (ii) which any
Loan Party intends to use for substantially the same purposes as any other
property which has been or is to be sold or transferred by that entity to any
other Person in connection with such lease.

          (m)  Margin Regulation. The Borrower shall not use or permit any other
               -----------------
     Person to use any portion of the proceeds of any credit extended under this
     Agreement in any manner which might cause the extension of credit or the
     application of such proceeds to violate the 1933 Act or the 1934 Act (each
     as amended to the Closing Date and from time to time thereafter, and any
     successor statute) or to violate Regulation U, or Regulation X, or any
     other regulation of the Federal Reserve Board, in each case as in effect on
     the date or dates of such extension of credit and such use of proceeds.

          (n)  Lease Obligations.  None of the Borrower or any of its
               -----------------                                     
     Subsidiaries shall enter into any operating lease (which is not a
     Capitalized Lease) with respect to any real or personal property (or any
     interest therein), except (i) operating leases which, together with all
     other such arrangements (excluding those described in clauses (ii) and
                                                           ------------    
     (iii) below) which shall then be in effect, will not require the payment of
     -----                                                                      
     an aggregate amount of rentals by the Borrower and its Subsidiaries
     (determined on a consolidated basis) in excess of $13,500,000 for any
     Fiscal Year through December 31, 2000, $15,000,000 for the Fiscal Year
     ending December 31, 2001, and $18,000,000 for any Fiscal Year thereafter,
     (ii) operating leases for not more than one year and (iii) operating leases
     in connection with the performance of specific projects for the period of
     such projects; provided, however, that any calculation made for purposes of
                    --------  -------                                           
     this section shall exclude any amounts required to be expended for
     maintenance, repairs, insurance, taxes, assessments, and other similar
     charges.

          (o)  Modification of Material Agreements and Documents.  None of the
               -------------------------------------------------              
     Borrower or any of its Subsidiaries shall consent to any amendment,
     supplement or other modification of any terms or provisions contained in,
     or applicable to (a) the Bonding Agreement or its Certificate of
     Incorporation, By-Laws or other organizational documents in any manner
     materially adverse to the rights or interests of the Secured Parties under
     the Loan Documents, or (b) the Merger Agreement, the Shareholders Agreement
     or the Note Indenture in any respect (other than a modification of the Note
     Indenture pursuant to the terms of Section 9.01 thereof).

          (p)  Change of Location or Name. None of the Loan Parties shall change
               --------------------------
     (i) the location of its principal place of business, chief executive
     office, major executive office, chief place of business or its records
     concerning its business and financial affairs; or (ii) its name or the name
     under or by which it conducts its business, in each case without first
     giving the Administrative Agent thirty (30) days' prior written notice
     thereof and taking any and all actions which may be necessary or desirable,
     or which the 


                                     -56-
<PAGE>
 
     Administrative Agent may reasonably request, to maintain and preserve all
     Liens in favor of the Administrative Agent granted pursuant to the
     Collateral Documents; provided that notwithstanding the foregoing, none of
                           --------
     the Loan Parties shall change the location of its principal place of
     business, chief executive office, chief place of business or its records
     concerning its business and financial affairs from the contiguous
     continental United States of America to any place outside the contiguous
     continental United States of America.

          (q)  Take or Pay Contracts.  None of the Borrower or any of its
               ---------------------                                     
     Subsidiaries shall enter into or be a party to any arrangement for the
     purchase of materials, supplies, other property or services if such
     arrangement by its express terms requires that payment be made by the
     Borrower or such Subsidiary regardless of whether such materials, supplies,
     other property or services are delivered or furnished to it; provided,
                                                                  -------- 
     however, the Borrower and its Subsidiaries may enter into such arrangements
     -------                                                                    
     which are incidental to its business and not entered into for speculation.

          (r)  Use of Proceeds.  None of the Borrower or any of its Subsidiaries
               ---------------                                                  
     shall directly or indirectly use or apply any of the proceeds of any Loans
     in a manner inconsistent with the provisions of Section 2.21.
                                                     ------------ 

          SECTION 6.3.   Financial Covenants. The Borrower covenants and agrees
                         -------------------
that so long as the Lenders shall have any Commitment hereunder, any Letter of
Credit shall remain outstanding, or any other Obligation shall remain
outstanding, unless the Majority Lenders shall otherwise give their prior
written consent:

          (a)  Capital Expenditures and Permitted Business Acquisitions.  The
               --------------------------------------------------------      
     Borrower and its consolidated Subsidiaries shall not make or permit Capital
     Expenditures and Permitted Business Acquisitions in an aggregate amount in
     excess of $12,000,000 during any Fiscal Year commencing with Fiscal Year
     1998 (with respect to any such Fiscal Year, the "Base Capital Expenditure
                                                      ------------------------
     Amount"); provided, however, that the Base Capital Expenditure Amount for
     ------    --------  -------                                              
     Fiscal Year 1998 shall be $12,500,000, and the Base Capital Expenditure
     Amount for any Fiscal Year after Fiscal Year 1998 may be increased by an
     amount equal to the lesser of (i) $6,000,000 and (ii) the excess, if any,
     of (A) the Base Capital Expenditure Amount for the immediately preceding
     Fiscal Year, over (B) the actual amount of Capital Expenditures and
     Permitted Business Acquisitions made by the Borrower and its Subsidiaries
     during such immediately preceding Fiscal Year; provided further, however,
                                                    ----------------  ------- 
     that Capital Expenditures for the backhoe dredge New York and up to
     $10,000,000 of Capital Expenditures made to consummate the acquisition of
     certain assets by Great Lakes from T.L. James & Company, Inc. ("TL James")
     pursuant to that certain Asset Purchase Agreement dated as of July 24,
     1998, as amended, between Great Lakes and TL James, shall be excluded in
     determining the Borrower's compliance with this Section 6.3(a).
                                                     -------------- 
          (b)  Maximum Total Leverage.  The Borrower and its consolidated
               ----------------------                                    
     Subsidiaries shall not permit the ratio (the "Total Leverage Ratio") of (i)
                                                   --------------------         
     the aggregate unpaid principal amount of Total Funded Debt as of the last
     day of any Fiscal Quarter ending during the 

                                     -57-
<PAGE>
 
     periods described below (each, a "Total Leverage Ratio Test Date") to (ii)
                                       ------------------------------
     EBITDA for the four (4) consecutive Fiscal Quarter period ending as of such
     Total Leverage Ratio Test Date, to exceed the corresponding ratio set forth
     below opposite such period:

        Period                                                   Ratio
        ------                                                   -----

        Closing Date through and
        including December 31, 1999                          6.25 to 1.00  
                                                             
        January 1, 2000 through and
        including December 31, 2000                          5.75 to 1.00 
                                                             
        January 1, 2001 through and
        including December 31, 2001                          5.25 to 1.00 
                                                             
        January 1, 2002 and                                  4.75 to 1.00; 
        thereafter


        (c)    Maximum Senior Leverage.  The Borrower and its consolidated
               -----------------------                                    
     Subsidiaries shall not permit the ratio of (i) the aggregate unpaid
     principal amount of Senior Debt as of last day of any Fiscal Quarter ending
     during the periods described below to (ii) EBITDA for the four (4)
     consecutive Fiscal Quarter period ending as of such date, to exceed the
     corresponding ratio set forth below opposite such period:


        Period                                                   Ratio     
        ------                                                   -----

        Closing Date through and      
        including December 31, 1999                          3.50 to 1.00 
                                                                           
        January 1, 2000 through and                                        
        including December 31, 2000                          3.00 to 1.00  
                                                                           
        January 1, 2001 through and                                        
        including December 31, 2001                          2.50 to 1.00  
                                                                           
        January 1, 2002 and                                  2.00 to 1.00. 
        thereafter                                                         

        (d) Interest Coverage Ratio.  The Borrower and its consolidated
            -----------------------                                    
     Subsidiaries shall not permit the ratio of  (i) EBITDA for any four (4)
     consecutive Fiscal Quarter period ending as of the last day of any Fiscal
     Quarter ending during the period described below to (ii) Interest Expense
     for the four (4) consecutive Fiscal Quarter period ending as of such date,
     to be less than the corresponding ratio set forth below opposite such
     period:


                                     -58-
<PAGE>
 
        Period                                                   Ratio 
        ------                                                   -----
                                      
        December 31, 1998 through and                        1.75 to 1.00 
        including December 31, 2000                                       
                                                                          
        January 1, 2001 and thereafter                       2.00 to 1.00
                                                                         
Notwithstanding the foregoing, (x) Interest Expense for the period ending
December 31, 1998 shall equal Interest Expense for the Fiscal Quarter ended such
date, multiplied by 4, (y) Interest Expense for the period ending on or about
March 31, 1999 shall equal Interest Expense for the two consecutive Fiscal
Quarters ended such date, multiplied by 2, and (z) Interest Expense for the
period ending on or about June 30, 1999 shall equal Interest Expense for the
three consecutive Fiscal Quarters ended such date, multiplied by four-thirds
(4/3).

        (e)   Net Worth.  The Borrower and its consolidated Subsidiaries shall
              ---------                                                       
     not permit Net Worth, as of the last day of any Fiscal Quarter ending after
     the Closing Date, to be less than the sum of (i) -$56,100,000, plus (ii)
                                                                    ----     
     fifty percent (50%) of the sum of the positive Net Income (if any) for the
     Fiscal Quarter ending on or about December 31, 1998, plus fifty percent
                                                          ----              
     (50%) of the sum of the positive Net Income (if any) for each Fiscal Year
     ending on or after December 31, 1999 and prior to the date of determination
     hereunder.

        SECTION 6.4.    Financial Reporting.  The Borrower covenants and agrees
                        -------------------                                    
that so long as any of the Lenders shall have any Commitment hereunder, there
shall exist any outstanding principal under any Loans, any Letter of Credit
shall remain outstanding, or any other Obligation shall remain outstanding,
unless the Majority Lenders shall otherwise give their prior written consent:

        (a)   System of Accounting.  The Borrower shall maintain the percentage-
              --------------------                                             
     of-completion accounting policies relative to change orders and work-in-
     progress as in effect on the Closing Date and shall in any event maintain a
     system of accounting established and administered in accordance with sound
     business practices to permit preparation of financial statements in
     conformity with GAAP (except as may be otherwise required pursuant to
     Section 1.4), and each of the financial statements described below shall be
     -----------                                                                
     prepared from such system and records.

        (b)   Quarterly Reports.  The Borrower shall provide the Administrative
              -----------------                                                
     Agent within 45 days after the end of each of the first three Fiscal
     Quarters of each Fiscal Year, unaudited consolidated and consolidating
     balance sheets of the Borrower and its Subsidiaries as of the end of such
     Fiscal Quarter and unaudited consolidated and consolidating statements of
     earnings and consolidated statements of cash flow of the Borrower and its
     Subsidiaries for such Fiscal Quarter and for the period commencing at the
     end of such Fiscal Quarter, certified by an Authorized Officer of the
     Borrower.

                                     -59-
<PAGE>
 
        (c)   Annual Reports. The Borrower shall provide to the Administrative
              --------------                                                  
     Agent, within 90 days after the end of each Fiscal Year, a copy of the
     annual audit report for such Fiscal Year for the Borrower and its
     Subsidiaries, including therein consolidated (and unaudited consolidating)
     balance sheets of the Borrower and its Subsidiaries as of the end of such
     Fiscal Year and consolidated (and unaudited consolidating) statements of
     earnings and cash flow of the Borrower and its Subsidiaries for such Fiscal
     Year by Deloitte & Touche or other independent public accountants
     reasonably acceptable to the Administrative Agent, together with such
     accountants' opinion, which shall not be subject to any Impermissible
     Qualification, and a certificate from such accountants containing a
     computation of, and showing compliance with, each of the financial ratios
     and restrictions contained in Section 6.3 and to the effect that, in making
                                   -----------                                  
     the examination necessary for the signing of such annual report by such
     accountants, they have not become aware of any Default or Event of Default
     that has occurred and is continuing, or, if they have become aware of such
     Default or Event of Default, describing such Default or Event of Default.

        (d)   Compliance Certificate. The Borrower shall provide to the
              ----------------------                                   
     Administrative Agent, within 45 days after the end of each of the first
     three Fiscal Quarters of each Fiscal Year and within 90 days after the end
     of the last Fiscal Quarter of each Fiscal Year, (i) a certificate
     substantially in the form of Exhibit F (the "Compliance Certificate"),
                                  ---------       ----------------------   
     executed by the Authorized Officer who is the chief financial officer,
     treasurer, assistant treasurer or controller of the Borrower, showing (in
     reasonable detail and  appropriate calculations and computations in all
     respects reasonably satisfactory to the Administrative Agent) compliance
     with the financial covenants set forth in Section 6.3, (ii) a backlog
                                               -----------                
     schedule and a schedule of all work-in-progress, identified by contract or
     project, of the Borrower and its Subsidiaries for the performance of
     dredging, construction or other services, prepared in a manner consistent
     with past practice, (iii) notice of the occurrence of any Permitted
     Disposition or any Permitted Business Acquisition, describing, in detail
     reasonably satisfactory to the Administrative Agent, the assets sold or
     disposed of or the assets acquired and the purchase price or sale price
     thereof, as the case may be, during the preceding Fiscal Quarter, (iv)
     notice of the receipt of any sales proceeds, insurance or requisition
     proceeds or condemnation awards received in connection with the sale,
     damage, destruction, requisition or condemnation of any Collateral during
     the preceding Fiscal Quarter, including a statement with regard to whether
     the Borrower or such Subsidiary intends to apply such sales proceeds,
     insurance or requisition proceeds or awards, as the case may be, to
     replace, within one year of receipt thereof, such sold, damaged, destroyed,
     requisitioned or condemned assets or property Collateral used for
     substantially the same purpose as those sold, damaged, destroyed,
     requisitioned  or condemned and (v) notice of any (A) voluntary liquidation
     or dissolution by any Subsidiary of the Borrower into the Borrower or
     another Subsidiary of the Borrower, (B) merger by any such Subsidiary with
     and into the Borrower or another Subsidiary of the Borrower or (C) the
     purchase by the Borrower or any of its Subsidiaries of any capital stock of
     any other Subsidiary of the Borrower during the preceding Fiscal Quarter.

        (e)   Budget.  The Borrower shall deliver to the Administrative Agent,
              ------                                                          
     within 75 days after the end of each Fiscal Year, a budget for the next
     succeeding Fiscal Year, which 

                                     -60-
<PAGE>
 
     budget shall be prepared on a Fiscal Quarter basis and shall contain a
     projected, consolidated balance sheet, consolidated statement of earnings
     (broken out in reasonable detail by business segment) and a consolidated
     statement of cash flow of the Borrower and its Subsidiaries for such
     succeeding Fiscal Year.

          (f)    Securities Reports.  With reasonable promptness after the 
                 ------------------
     sending or filing thereof, the Borrower shall deliver to the Administrative
     Agent copies of all reports and registration statements which the Borrower
     or any of its Subsidiaries files with the Securities and Exchange
     Commission or any national securities exchange.

          (g)    Vessels.  The Borrower shall deliver to the Administrative 
                 -------
     Agent, within ninety (90) days after the end of each Fiscal Year, a
     certificate of an Authorized Officer of the Borrower listing all Designated
     Vessels.

          (h)    Other Information.  With reasonable promptness, the Borrower 
                 -----------------
     shall deliver such other data and information (including, without
     limitation, intercompany loan and advance balances among the Borrower and
     each of its Subsidiaries) as the Administrative Agent or a Lender through
     the Administrative Agent shall reasonably request.

          (i)    Delivery of Financial Information to the Lenders.  The
                 ------------------------------------------------      
     Administrative Agent shall promptly deliver to each Lender a copy of the
     financial information delivered to the Administrative Agent by the Borrower
     pursuant to Section 6.4.
                 ----------- 

          (j)    New Subsidiaries.  As soon as practicable after the end of the
                 ----------------                                              
     Fiscal Quarter ending on or about September 30, 1998 and each Fiscal
     Quarter thereafter, the Borrower shall provide the Administrative Agent
     with an updated Schedule 5.1(r) containing all of the information which
                     ---------------                                        
     would be required to be included in such schedule pursuant to Section 5.1
                                                                   -----------
     if such schedule were to be made true and complete as of the last day of
     such Fiscal Quarter (including, without limitation, information with
     respect to any newly acquired or created Subsidiaries); provided, however,
                                                             --------  ------- 
     that, no such updated schedule need be delivered to the Administrative
     Agent if the schedule which has been then most recently delivered to the
     Administrative Agent pursuant to this section (or attached to this
     Agreement as Schedule 5.1(r)) remains true and complete in all material
                  ---------------                                           
     respects as of the last day of such Fiscal Quarter.


                                  ARTICLE VII


                          EVENTS OF DEFAULT; REMEDIES
                          ---------------------------

 
          SECTION 7.1.  Events of Default.  Each of the following occurrences
                        -----------------                                    
shall constitute an Event of Default under this Agreement:

          (a)    Failure to Make Payments When Due.  Any Loan Party shall fail
                 ---------------------------------
     to pay on the date when due (i) any principal of any Loan or Reimbursement
     Obligation, (ii) any 

                                     -61-
<PAGE>
 
     interest or fees under the Loan Documents and such failure shall continue
     for three (3) Business Days, or (iii) any other Obligations and such
     failure shall continue for five (5) Business Days.

          (b)    Breach of Covenants.
                 ------------------- 

                 (i)   Any Loan Party shall fail duly and punctually to perform
          or observe any covenant or agreement binding on such Loan Party under
          Section 6.1(a), (f) or (m), Section 6.2 (other than Section 6.2(b),
          --------------  ---    ---  -----------             -------------- 
          (c) and (d)) or Section 6.3 of this Agreement.
          ---     ---     -----------                   

                 (ii)  Any Loan Party shall fail duly and punctually to perform
          or observe any covenant or agreement binding on such Loan Party under
          Section 6.1(c)(ii), (d), (i), (j), (k) or Section 6.2(b), (c) or (d),
          ------------------  ---  ---  ---  ---    --------------  ---    --- 
          or Section 6.4 of this Agreement, and such failure shall continue
             -----------                                                   
          unremedied for ten (10) Business Days (or in the case of Section
                                                                   -------
          6.1(j), three (3) Business Days) after an officer of such Loan Party
          ------                                                              
          first has knowledge of such failure or such Loan Party receives
          written notice thereof from the Administrative Agent, whichever is
          earlier.

                 (iii) Any Loan Party shall fail duly and punctually to perform
          or observe any covenant or agreement binding on such Loan Party under
          this Agreement (other than as provided in subsection(a) above or in
                                                    -------------            
          clause(i) or (ii) of this subsection(b)) or under any of the other
          ---------    ----         -------------                           
          Loan Documents, and such failure shall continue unremedied for thirty
          (30) days after an Authorized Officer first has knowledge of such
          failure or such Loan Party receives written notice thereof from the
          Administrative Agent, whichever is earlier.

          (c)    Incorrect Representation or Warranty.  Any representation or
                 ------------------------------------                        
     warranty made by any Loan Party or any officer of any Loan Party under or
     in connection with this Agreement, any other Loan Document or any
     amendment, waiver or modification of any of the terms thereof shall prove
     to have been incorrect or misleading when made in any material respect.

          (d)    Default as to Other Debt.  Default in the payment when due 
                 ------------------------
     subject to any applicable grace period (whether by scheduled maturity,
     required prepayment, required redemption, acceleration, demand or
     otherwise) on any Debt (other than the Obligations), individually or in the
     aggregate, having an outstanding principal amount in excess of $4,000,000,
     of or guaranteed by, any Loan Party or Subsidiary of the Parent; or any
     breach, default or event of default shall occur, or any other event shall
     occur or condition shall exist, under any instrument, agreement or
     indenture pertaining thereto, if the effect thereof, after giving effect to
     any applicable grace or cure period, is to accelerate, or permit the
     holder(s) of such Debt to accelerate the maturity of such Debt, or require
     a mandatory redemption or repurchase of such Debt prior to its scheduled
     redemption or repurchase; or any such Debt shall be declared due and
     payable or required to be prepaid (other than by a regularly scheduled
     required prepayment), repurchased or redeemed prior

                                     -62-
<PAGE>
 
     to the originally stated maturity thereof; or the holder of any Lien
     related to a Debt in excess of $4,000,000 shall commence foreclosure of
     such Lien; or an "Event of Default" shall have occurred under and as
     defined in the Reliance Agreement after giving effect to any applicable
     cure periods and any waivers thereof; or an "Event of Default" shall have
     occurred under and as defined in Section 6.01 of the Note Indenture.

          (e)    Bankruptcy.
                 ---------- 

                 (i)    Any Loan Party or Subsidiary of the Borrower shall
          become insolvent, or generally not pay its debts as such debts become
          due, or shall admit in writing its inability to pay its debts
          generally, or shall make a general assignment for the benefit of
          creditors; or

                 (ii)   any proceeding shall be instituted by or against any
          Loan Party or Subsidiary of the Borrower seeking to adjudicate it a
          bankrupt or insolvent, or seeking liquidation (other than in a
          transaction permitted under Section 6.2(a)(i)), winding up,
                                      -----------------              
          reorganization, arrangement, adjustment, protection, relief or
          composition of it or its debts under any law relating to bankruptcy,
          insolvency or reorganization or relief of debtors or seeking the entry
          of an order for relief or the appointment of a receiver, trustee or
          other similar official for it or for any substantial part of its
          property and, in the case of any such proceeding instituted against it
          (but not instituted by it), either such proceeding shall remain
          undismissed, undischarged, unvacated, unbonded or unstayed for a
          period of sixty (60) days, or any of the actions sought in such
          proceeding (including the entry of an order for relief against, or the
          appointment of a receiver, trustee, custodian or other similar
          official for, it or any substantial part of its property) shall occur;
          or

                 (iii)  any Loan Party or Subsidiary of the Borrower shall take
          any corporate action to authorize any of the actions set forth in this
          Section 7.1(e).
          -------------- 

          (f)    Judgments and Attachments.  Any final judgment (or judgments)
                 -------------------------
     or money judgment (or judgments), writ or warrant of attachment, or similar
     process involving in excess of $4,000,000 (to the extent not covered by
     insurance which is confirmed in writing by the insurers or agents of the
     Borrower or Subsidiaries as covering such judgment or process) in the
     aggregate shall be entered or filed against any Loan Party or Subsidiary of
     the Borrower or any of their respective assets and either (1) shall remain
     undischarged, unpaid, unvacated, unbonded or unstayed for a period of
     thirty (30) days from the date of its entry, or (2)there shall be any
     period of thirty (30) consecutive days during which a stay of enforcement
     of such judgment or order, by reason of a pending appeal or otherwise,
     shall not be in effect.

          (g)    ERISA Termination Event.  Any Termination Event occurs which 
                 -----------------------
     the Majority Lenders believe could have a Material Adverse Effect.

                                     -63-
<PAGE>
 
          (h)    ERISA Waiver.  If the plan administrator of any Plan applies 
                 ------------
     under Section 412(d) of the IRC for a waiver of the minimum funding
     standards of Section 412(a) of the IRC and the Majority Lenders believe
     that the business hardship upon which the application for such waiver is
     based could have a Material Adverse Effect.

          (i)    Termination of Documents; Failure of Security.  Any of the Loan
                 ---------------------------------------------                  
     Documents shall cease for any reason (other than by reason of any action or
     inaction by the Administrative Agent or any Lender) to be in full force and
     effect against any Loan Party (other than in accordance with the terms
     hereof or thereof), or any Loan Party shall disavow its obligations under,
     or shall contest the validity or enforceability of, any of the Loan
     Documents or the Obligations, or any material Lien intended to be created
     thereby ceases to be or is not valid and perfected in any material respect;
     or any such Lien shall be subordinated or shall not have the priority
     contemplated by this Agreement, any of the other Loan Documents, for any
     reason, or any Loan Party or Affiliate thereof shall institute any action
     seeking a determination of any of the foregoing.

          (j)    Change in Control. Any of the following events occur:
                 -----------------                                    

                 (i)    (A) prior to an initial public offering of the Voting
          Stock of the Borrower or any Person which directly or indirectly owns
          all of outstanding Voting Stock of the Borrower or at any other time
          when such Voting Stock is not traded on a national securities
          exchange, the failure of one or more Principals (1) to own, directly
          or indirectly, at least 51% of the Voting Stock of the Borrower,
          determined on a fully diluted basis and (2) to have the power to
          direct or cause the direction of the management or policies of
          Borrower or (B) following such initial public offering and at any time
          the Voting Stock of the Borrower or any Person which directly or
          indirectly owns all of outstanding Voting Stock of the Borrower is
          traded on a national securities exchange, CVC, Citicorp and any direct
          or indirect wholly-owned Subsidiary of Citicorp (individually or in
          the aggregate) own, directly or indirectly, less than 40% of the
          Voting Stock of the Borrower, determined on a fully-diluted basis, and
          a Person (other than a Principal) owns a greater percentage of such
          Voting Stock, determined on a fully-diluted basis; or

               (ii)     the failure of the Borrower (i) to own (directly or
          indirectly), free and clear of all Liens or other encumbrances (other
          than any Lien or encumbrance created by the Loan Documents), 100% of
          the outstanding shares of each class of capital stock of any
          Subsidiary Guarantor in existence on the Closing Date on a fully
          diluted basis and (ii) to have the power (directly or indirectly) to
          direct or cause the direction of the management or policies of any
          such Subsidiary Guarantor; or

               (iii)    a majority of the Board of Directors of the Borrower are
          not Continuing Directors; or

               (iv)     any "Change of Control" (as defined in the Note
          Indenture) occurs.

                                     -64-
<PAGE>
 
          (k)  Bonding Agreement.
               ----------------- 

               (i)     Any Person executing bonds, undertakings or instruments
          of guaranty as surety for the Borrower or any of its Subsidiaries with
          respect to any marine construction or dredging contracts to be entered
          into by the Borrower or any such Subsidiary for any reason ceases to
          issue such bonds, undertakings or instruments of guaranty and such
          denial, individually or in the aggregate, could reasonably be expected
          to have a Material Adverse Effect; or

               (ii)    Reliance provides notice to the Administrative Agent
          (pursuant to Section 4.4 of the Intercreditor Agreement) of any breach
          or default under any bonded contract or under the Reliance Agreement
          and, as a result thereof, Reliance has taken action pursuant to
          Section 4.1(a) of the Intercreditor Agreement; or

               (iii)   The Borrower or any of its Subsidiaries defaults in the
          payment when due of any amount due under the Bonding Agreement or
          breaches or default with respect to any other term of  the Bonding
          Agreement, if the effect of such failure to pay, default or breach is
          to cause any Person executing bonds, undertakings or instruments of
          guaranty as surety for the Borrower or any of its Subsidiaries to take
          possession of the work under any of the bonded contracts of the
          Borrower or any of its Subsidiaries and such possession could
          reasonably be expected to result in a Material Adverse Effect; or

               (iv)    Any Loan Party breaches or defaults with respect to any
          term under any of the bonded contracts of such Loan Party, if the
          effect of such default or breach is to cause any Person executing
          bonds, undertakings or instruments of guaranty as surety for such Loan
          Party to take possession of the work under such bonded contract and
          such possession could reasonably be expected to result in a Material
          Adverse Effect.

          SECTION 7.2.  Acceleration.  Upon the occurrence of any Event of
          ------------  ------------                                      
Default described in clause (ii) or (iii) of Section 7.1(e), the Commitments
                     -----------    -----    --------------                 
shall each automatically and immediately terminate and all unpaid Obligations
shall automatically become immediately due and payable, without presentment,
demand, or protest or other requirements of any kind (including valuation and
appraisement diligence, presentment, notice of intent to demand or accelerate
and of acceleration), all of which are hereby expressly waived by the Borrower,
and the obligation of each Lender to make any Loan and of the Issuing Lender to
issue and of the Lenders to participate in any Letter of Credit hereunder shall
thereupon terminate; and upon the occurrence and during the continuance of any
other Event of Default, the Administrative Agent may, and at the direction of
the Majority Lenders, shall, by written notice to the Borrower, immediately
terminate the Commitments and/or declare all of the Obligations of the Borrower
to be, and the same shall forthwith become, immediately due and payable together
with accrued interest thereon, and the obligation of each Lender to make any
Loan and of the Issuing Lender to issue and of the Lenders to participate in any
Letter of Credit hereunder shall thereupon terminate.  In addition to and not in
limitation of any other right available to the Lenders under any of the Loan
Documents 

                                     -65-
<PAGE>
 
or otherwise at law or equity, upon the giving of such notice by the
Administrative Agent, the Borrower shall be required to deposit immediately with
the Administrative Agent for the benefit of the Lenders, in immediately
available funds, an amount equal to the Letter of Credit Obligations (the
"Deposit").  The Borrower's obligation to pay the Deposit shall be absolute and
- --------                                                                       
unconditional, and the Deposit shall be deposited in a special collateral
account with the Administrative Agent to ensure reimbursement of any drawings
under such Letters of Credit and payment of all other amounts due and payable
under any of the Loan Documents regarding the Letters of Credit.

          SECTION 7.3.  Injunctive Relief.  The Borrower recognizes that in the
                        -----------------                                      
event the Borrower fails to perform, observe or discharge any of its
Obligations, any remedy of law may prove to be inadequate relief to the
Administrative Agent or any Lender; therefore, the Borrower agrees that the
Administrative Agent and each Lender, if the Administrative Agent or such Lender
so requests, shall be entitled to temporary and permanent injunctive relief
during the continuation of an Event of Default in any such case without the
necessity of proving actual damages or inadequacy of damages as an available
remedy therefor.

          SECTION 7.4.  Allocation Among Secured Parties.  Following the
                        --------------------------------                
occurrence of an Event of Default, and notwithstanding anything in this
Agreement to the contrary, all payments, and collections with respect to
proceeds of Collateral, shall be applied to the Obligations which are then due
and payable and if such payments and proceeds are insufficient to satisfy all
such Obligations which are due and payable, such payments and proceeds shall be
applied in the following order:  (i) to the payment of all amounts then due with
respect to fees (including Attorney Costs), charges, expenses and indemnity
claims due the Administrative Agent, (ii) to the payment of all other amounts
then due with respect to fees (including Attorney Costs), charges, expenses and
indemnity claims due the other Secured Parties, (iii) to the payment of amounts
then due with respect to interest on the Loans, (iv) to the payment of amounts
then due with respect to principal of the Loans and Reimbursement Obligations
(and to the extent Letter of Credit Obligations are contingent, cash collateral
with respect thereto), and amounts then due the Secured Parties with respect to
Rate Protection Agreements and (v) to the payment of all other Obligations.


                                  ARTICLE VIII


                            THE ADMINISTRATIVE AGENT
                            ------------------------

 
          SECTION 8.1.  Appointment and Authorization.  Each Lender hereby
                        -----------------------------                     
irrevocably appoints, designates and authorizes the Administrative Agent to take
such action on its behalf under the provisions of this Agreement and each other
Loan Document and to exercise such powers and perform such duties as are
expressly delegated to it by the terms of this Agreement or any other Loan
Document, together with such powers as are reasonably incidental thereto,
including, without limitation, acting as the representative of each Secured
Party for the perfection of the Liens granted pursuant to the Collateral
Documents.  Notwithstanding any provision to the contrary contained elsewhere in
this Agreement or in any other Loan Document, the Administrative Agent shall not
have any duties or responsibilities, except those expressly set 

                                     -66-
<PAGE>
 
forth herein, nor shall the Administrative Agent have or be deemed to have any
fiduciary relationship with any Lender, and no implied covenants, functions,
responsibilities, duties, obligations or liabilities shall be read into this
Agreement or any other Loan Document or otherwise exist against the
Administrative Agent. Notwithstanding the use of the term "Administrative
Agent", the Administrative Agent's legal relationship with the Lenders shall not
be one of agency, it being understood and agreed to by the Lenders that the
Administrative Agent is an independent contractor for the Lenders.

          SECTION 8.2.  Delegation of Duties.  The Administrative Agent may
                        --------------------                               
execute any of its duties under this Agreement or any other Loan Document by or
through its agents, employees or attorneys-in-fact and shall be entitled to
advice of counsel concerning all matters pertaining to such duties.  The
Administrative Agent shall not be responsible for the negligence or misconduct
of any agent or attorney-in-fact that it selects with reasonable care.

          SECTION 8.3.  Liability of Administrative Agent.  None of the
                        ---------------------------------              
Administrative Agent-Related Persons shall (i) be liable for any action taken or
omitted to be taken by any of them under or in connection with this Agreement or
any other Loan Document (except for its own gross negligence, or willful
misconduct), or (ii) be responsible in any manner to any of the Lenders for any
recital, statement, representation or warranty made by the Borrower or any
Subsidiary or Affiliate of the Borrower, or any officer thereof, contained in
this Agreement or in any other Loan Document, or in any certificate, report,
statement or other document referred to or provided for in, or received by the
Administrative Agent under or in connection with, this Agreement or any other
Loan Document, or for the value of any Collateral or the validity,
effectiveness, genuineness, enforceability or sufficiency of this Agreement or
any other Loan Document, or for any failure of the Borrower or any other party
to any Loan Document to perform its obligations hereunder or thereunder.  No
Administrative Agent-Related Person shall be under any obligation to any Lender
to ascertain or to inquire as to the observance or performance of any of the
agreements contained in, or conditions of, this Agreement or any other Loan
Document, or to inspect the properties, books or records of the Borrower or any
of its Subsidiaries or Affiliates.

          SECTION 8.4.  Reliance by Administrative Agent.
                        -------------------------------- 

          (a)    The Administrative Agent shall be entitled to rely, and shall
     be fully protected in relying, upon any writing, resolution, notice,
     consent, certificate, affidavit, letter, telegram, facsimile, telex or
     telephone message, statement or other document or conversation believed by
     it to be genuine and correct and to have been signed, sent or made by the
     proper Person or Persons, and upon advice and statements of legal counsel
     (including counsel to the Loan Parties), independent accountants and other
     experts selected by the Administrative Agent. Except for its express
     obligations set forth in Article II hereof, the Administrative Agent shall
                              ----------                                       
     be fully justified in failing or refusing to take any action under this
     Agreement or any other Loan Document unless it shall first receive such
     advice or concurrence of the Majority Lenders as it deems appropriate and,
     if it so requests, it shall first be indemnified to its satisfaction by the
     Lenders against any and all liability and expense which may be incurred by
     it by reason of taking or continuing to 

                                     -67-
<PAGE>
 
     take any such action. The Administrative Agent shall in all cases be fully
     protected in acting, or in refraining from acting, under this Agreement or
     any other Loan Document in accordance with a request or consent of the
     Majority Lenders and such request and any action taken or failure to act
     pursuant thereto shall be binding upon all of the Lenders.

          (b)    For purposes of determining compliance with the conditions
     specified in Sections 4.1 and 4.2, each Lender that has executed this
                  ------------     ---                                    
     Agreement, or an Assignment and Acceptance, shall be deemed to have
     consented to, approved or accepted or to be satisfied with each document or
     other matter either sent by the Administrative Agent to such Lender for
     consent, approval, acceptance or satisfaction, or required thereunder to be
     consented to or approved by or acceptable or satisfactory to such Lender,
     unless an officer of the Administrative Agent responsible for the
     transactions contemplated by the Loan Documents shall have received notice
     from such Lender prior to the initial Borrowing specifying its objection
     thereto and either such objection shall not have been withdrawn by notice
     to the Administrative Agent to that effect or such Lender shall not have
     made available to the Administrative Agent such Lender's ratable portion of
     such Borrowing.

          SECTION 8.5.  Notice of Default.  The Administrative Agent shall not
                        -----------------                                     
be deemed to have knowledge or notice of the occurrence of any Default or Event
of Default, except with respect to defaults in the payment of principal,
interest and fees required to be paid to the Administrative Agent for the
account of the Lenders, unless the Administrative Agent shall have received
written notice from a Lender or the Borrower referring to this Agreement,
describing such Default or Event of Default and stating that such notice is a
"notice of default."  In the event that the Administrative Agent receives such a
notice, the Administrative Agent shall give prompt notice thereof to the
Lenders.  The Administrative Agent shall take such action with respect to such
Default or Event of Default as shall be requested by the Majority Lenders in
accordance with Article VII; provided that unless and until the Administrative
                -----------  --------                                         
Agent shall have received any such request, the Administrative Agent may (but
shall not be obligated to) take such action, or refrain from taking such action,
with respect to such Default or Event of Default as it shall deem advisable or
in the best interest of the Lenders.

          SECTION 8.6.  Credit Decision.  Each Lender expressly acknowledges
                        ---------------                                     
that none of the Administrative Agent-Related Persons has made any
representation or warranty to it and that no act by the Administrative Agent
hereinafter taken, including any review of the affairs of the Loan Parties shall
be deemed to constitute any representation or warranty by the Administrative
Agent to any Lender.  Each Lender represents to the Administrative Agent that it
has, independently and without reliance upon the Administrative Agent and based
on such documents and information as it has deemed appropriate, made its own
appraisal of and investigation into the business, prospects, operations,
property, financial and other condition and creditworthiness of the Loan
Parties, and all applicable bank regulatory laws relating to the transactions
contemplated thereby, and made its own decision to enter into this Agreement and
extend credit to the Borrower hereunder.  Each Lender also represents that it
will, independently and without reliance upon the Administrative Agent and based
on such documents and information as it shall deem appropriate at the time,
continue to make its own credit analysis, appraisals and decisions in taking or
not taking action under this Agreement and the other Loan 

                                     -68-
<PAGE>
 
Documents, and to make such investigations as it deems necessary to inform
itself as to the business, prospects, operations, property, financial and other
condition and creditworthiness of the Borrower. Except for notices, reports and
other documents expressly herein required to be furnished to the Lenders by the
Administrative Agent, the Administrative Agent shall not have any duty or
responsibility to provide any Lender with any credit or other information
concerning the business, prospects, operations, property, financial and other
condition or creditworthiness of the Borrower which may come into the possession
of any of the Administrative Agent-Related Persons.

          SECTION 8.7.  Indemnification.  Whether or not the transactions
                        ---------------                                  
contemplated hereby shall be consummated, the Lenders shall indemnify upon
demand the Administrative Agent-Related Persons (to the extent not reimbursed by
or on behalf of the Borrower and without limiting the obligation of the Borrower
to do so), ratably according to such Lender's Percentage from and against any
and all liabilities, obligations, losses, damages, penalties, actions,
judgments, suits, costs, expenses and disbursements of any kind whatsoever which
may at any time (including at any time following the repayment of the Loans and
the termination or resignation of the related Administrative Agent) be imposed
on, incurred by or asserted against any such Person and which are in any way
relating to or arising out of this Agreement or any document contemplated by or
referred to herein or therein or the transactions contemplated hereby or thereby
or any action taken or omitted by any such Person under or in connection with
any of the foregoing; provided that no Lender shall be liable for the payment to
                      --------                                                  
the Administrative Agent-Related Persons of any portion of such liabilities,
obligations, losses, damages, penalties, actions, judgments, suits, costs,
expenses or disbursements resulting solely from such Person's gross negligence
or willful misconduct.  Without limitation of the foregoing, each Lender shall
reimburse the Administrative Agent upon demand for its ratable share of any
costs or out-of-pocket expenses (including Attorney Costs) incurred by the
Administrative Agent in connection with the preparation, execution, delivery,
administration, modification, amendment or enforcement (whether through
negotiations, legal proceedings or otherwise) of, or legal advice in respect of
rights or responsibilities under, this Agreement, any other Loan Document, or
any document contemplated by or referred to herein to the extent that the
Administrative Agent is not reimbursed for such expenses by or on behalf of the
Borrower.  Without limiting the generality of the foregoing, if the IRS or any
other Governmental Authority of the United States or other jurisdiction asserts
a claim that the Administrative Agent did not properly withhold tax from amounts
paid to or for the account of any Lender (because the appropriate form was not
delivered, was not properly executed, or because such Lender failed to notify
the Administrative Agent of a change in circumstances which rendered the
exemption from, or reduction of, withholding tax ineffective, or for any other
reason) such Lender shall indemnify the Administrative Agent fully for all
amounts paid, directly or indirectly, by the Administrative Agent as tax or
otherwise, including penalties and interest, and including any taxes imposed by
any jurisdiction on the amounts payable to the Administrative Agent under this
Section, together with all costs and expenses (including Attorney Costs).  The
obligation of the Lenders in this Section shall survive the payment of all
Obligations hereunder.

                                     -69-
<PAGE>
 
          SECTION 8.8.  Administrative Agent in Individual Capacity.  Bank of
                        -------------------------------------------          
America and its Affiliates may make loans to, issue letters of credit for the
account of, accept deposits from, acquire equity interests in and generally
engage in any kind of banking, trust, financial advisory or other business with
the Loan Parties and their Affiliates as though Bank of America were not the
Administrative Agent hereunder and without notice to or consent of the Lenders.
With respect to its Loans and interests in Letters of Credit issued hereunder,
Bank of America shall have the same rights and powers under this Agreement as
any other Lender and may exercise the same as though it were not the
Administrative Agent, and the terms "Lender" and the "Lenders" shall include
Bank of America in its individual capacity.

          SECTION 8.9.  Successor Administrative Agent.  The Administrative
                        ------------------------------                     
Agent may, and at the request of the Majority Lenders shall, resign as
Administrative Agent upon thirty (30) days' notice to the Lenders.  If the
Administrative Agent shall resign as Administrative Agent under this Agreement,
the Majority Lenders shall appoint from among the Lenders a successor
representative for the Lenders.  If no successor representative is appointed
prior to the effective date of the resignation of the Administrative Agent, the
Administrative Agent may appoint, after consulting with the Lenders and the
Borrower, a successor representative from among the Lenders. Upon the acceptance
of its appointment as successor representative hereunder, such successor
representative shall succeed to all the rights, powers and duties of the
retiring Administrative Agent and the term "Administrative Agent" shall mean
such successor representative and the retiring Administrative Agent's
appointment, powers and duties as Administrative Agent shall be terminated.
After any retiring Administrative Agent's resignation hereunder as
Administrative Agent, the provisions of this Article VIII and Sections 9.4 and
                                             ------------     ------------    
9.10 shall inure to its benefit as to any actions taken or omitted to be taken
- ----                                                                          
by it while it was Administrative Agent under this Agreement.  If no successor
representative has accepted appointment as Administrative Agent by the date
which is thirty (30) days following a retiring Administrative Agent's notice of
resignation, the retiring Administrative Agent's resignation shall nevertheless
thereupon become effective and the Lenders shall perform all of the duties of
the Administrative Agent hereunder until such time, if any, as the Majority
Lenders appoint a successor representative as provided for above.  Upon
resignation, the Administrative Agent shall execute and deliver such assignments
and take such other actions as the Lenders shall reasonably request in order to
transfer and assign its rights and interests under the Collateral Documents to
the Lenders or any successor representative appointed by the Lenders; provided
                                                                      --------
that any costs and expenses incurred by the Administrative Agent in taking such
actions shall be reimbursed in accordance with Section 9.4(a).
                                               -------------- 

          SECTION 8.10.  Collateral Matters; Release of Collateral.
                         ----------------------------------------- 

          (a)    The Administrative Agent is authorized on behalf of all the
     Lenders, without the necessity of any notice to or further consent from the
     Lenders, from time to time to take any action with respect to any
     Collateral or the Collateral Documents which may be necessary to perfect
     and maintain perfected the security interest in and Liens upon the
     Collateral granted pursuant to the Collateral Documents.

                                     -70-
<PAGE>
 
          (b)    The Lenders irrevocably authorize the Administrative Agent, and
     the Administrative Agent hereby agrees upon the request of the Borrower, to
     release any Lien granted to or held by the Administrative Agent upon any
     Collateral (i) upon termination of the Commitments and payment in full of
     all Loans and all other Obligations payable under this Agreement and under
     any other Loan Document; (ii) constituting property sold or to be sold or
     disposed of as part of or in connection with any disposition permitted
     hereunder; (iii) constituting property in which none of the Loan Parties
     owned any interest at the time the Lien was granted or at any time
     thereafter; (iv) constituting property leased to any Loan Party under a
     lease which has expired or been terminated in a transaction permitted under
     this Agreement or is about to expire and which has not been, and is not
     intended by such Loan Party to be, renewed or extended; (v) consisting of
     an instrument evidencing Debt or other debt instrument, if the indebtedness
     evidenced thereby has been paid in full; (vi) if required by the
     Intercreditor Agreement; (vii) with respect to which (A) the Borrower shall
     have requested in writing that the Administrative Agent release its Lien
     thereon, (B) the Borrower shall have provided, or caused one or more of its
     Subsidiaries to provide, substitute Collateral of equal or greater value to
     that of such Collateral subject to such requested Lien release, (C) the
     Administrative Agent shall have reasonably determined that such substitute
     Collateral is otherwise acceptable, (D) such substitute Collateral (and the
     Administrative Agent's substitute Lien thereon) shall be subject to
     documentation reasonably satisfactory to the Administrative Agent and (E)
     such release and substitution is otherwise made in compliance with Section
                                                                        -------
     3.1 of the Intercreditor Agreement; or (viii) if approved, authorized or
     ---                                                                     
     ratified in writing by the Majority Lenders.  Upon request by the
     Administrative Agent at any time, the Lenders will confirm in writing the
     Administrative Agent's authority to release particular types or items of
     Collateral pursuant to this Section 8.10(b).  The Administrative Agent
                                 ---------------                           
     hereby agrees to execute and deliver to the Borrower such instruments and
     documents as are requested by the Borrower (and prepared and filed at
     Borrower's sole cost and expense) to effect each release permitted
     hereunder.

          SECTION 8.11.  Intercreditor Agreement and other Loan Documents.
                         ------------------------------------------------  
Except to the extent provided in Section 9.1, each Lender from time to time
                                 -----------                               
party hereto authorizes and consents, by its execution hereof or by the
Assignment and Acceptance by which it became a Lender, to the Administrative
Agent's entering into the Intercreditor Agreement and each of the other Loan
Documents on such Lender's behalf and taking all actions taken, required or
permitted to be taken by the Administrative Agent thereunder.


                                   ARTICLE IX


                                 MISCELLANEOUS
                                 -------------
 
          SECTION 9.1.   Amendments, etc.  No amendment or waiver of any
                         ---------------                                
provision of this Agreement, nor consent to any departure by the Borrower
therefrom, shall in any event be effective unless the same shall be in writing
and signed by the Majority Lenders and then such waiver or consent shall be
effective only in the specific instance and for the specific purpose for which
given; provided that no amendment, waiver or consent shall, unless in writing
       --------                                                              
and signed by 

                                     -71-
<PAGE>
 
all the Lenders, do any of the following: (a) increase any of the Commitments of
the Lenders, (b) reduce the principal of, or interest on, the Loans or any fees
or other amounts payable hereunder, (c) postpone any date fixed for any payment
of principal of, or interest on, the Loans or any fees or other amounts payable
hereunder (it being understood that, with the consent of the Majority Lenders,
changes to any mandatory prepayments set forth in clauses (b) through (f) of 
                                                  -----------         ---
Section 2.8.1, including the application thereof, may be made), (d) change the 
- -------------                                           
percentage of any of the Commitments or of the aggregate unpaid principal amount
of the Loans, or the number of the Lenders, which shall be required for the
Lenders or any of them to take any action hereunder, or (e) release all or
substantially all of the Collateral (other than to the extent permitted by
Section 8.10), (f) amend this Section 9.1; and provided, further, that no 
- ------------                  -----------      --------  ------- 
amendment, waiver or consent shall, unless in writing and signed by the
Administrative Agent in addition to the Lenders required above to take such
action, affect the rights or duties of the Administrative Agent under this
Agreement.

          SECTION 9.2.  Notices, etc.  Unless otherwise specifically permitted
                        ------------                                          
herein, all notices and other communications provided for hereunder shall be in
writing (including telecopier, telegraphic, telex or cable communication) and
mailed, telecopied, telegraphed, telexed, cabled or delivered, and addressed as
follows:

          (a)    if to the Borrower or any other Loan Party:

                 Great Lakes Dredge & Dock Corporation
                 2122 York Road
                 Oak Brook, Illinois 60521
                 Attention: Bruce J. Biemeck
                 Telecopier:  (630) 574-2981

                 with a copy to:

                 Winston & Strawn
                 35 West Wacker Drive
                 Chicago, Illinois  60601
                 Attention:  Brian S. Hart
                 Telecopier:  (312) 558-5700

          (b)    if to any Lender, an original party hereto, at its Domestic
     Lending Office specified opposite its name on Schedule II hereto; if to any
                                                   -----------                  
     other Lender, at its Domestic Lending Office specified in the Assignment
     and Acceptance pursuant to which it became a Lender; and

                                     -72-
<PAGE>
 
          (c)    if to Bank of America as the Issuing Lender or the 
     Administrative Agent:

                 Bank of America National Trust and Savings Association
                 231 South LaSalle Street
                 Chicago, Illinois  60697
                 Attention:  Jay McKeown, Assistant Vice President
                 Telecopier:  (312) 974-9102

                 with a copy to:                                        
                                                                        
                 Bank of America National Trust and Savings Association 
                 231 South LaSalle Street                               
                 Chicago, Illinois 60697                                
                 Attention: Paul R. Frey, Senior Vice President         
                 Telecopier:  (312) 765-2193                            
                                                                        
                 and a copy to:                                         
                                                                        
                 Sidley & Austin                                        
                 One First National Plaza                               
                 Chicago, Illinois 60603                                
                 Attention: Michael L. Gold                             
                 Telecopier:  (312) 853-7036                             

or, as to the Borrower or the Administrative Agent, at such other address as
shall be designated by such party in a written notice to the other parties and,
as to each other party, at such other address as shall be designated by such
party in a written notice to the Borrower and the Administrative Agent.  All
such telecopier, telegraphic, telex or cable notices and communications shall,
when telecopied, telegraphed, telexed or cabled, be effective when telecopied
delivered to the telegraph company, confirmed by telex answerback or delivered
to the cable company, respectively, and all such mail notices and communications
shall be effective five (5) days after deposit in the mails; except that notices
and communications by any of the above means to the Administrative Agent
pursuant to Articles II, III or VIII shall not be effective until received by
            -----------  ---    ----                                         
the Administrative Agent.

          SECTION 9.3.  No Waiver; Remedies.  No failure on the part of any
                        -------------------                                
Lender or the Administrative Agent to exercise, and no delay in exercising, any
right hereunder shall operate as a waiver thereof; nor shall any single or
partial exercise of any such right preclude any other or further exercise
thereof or the exercise of any other right. The remedies herein provided are
cumulative and not exclusive of any remedies provided by law.

          SECTION 9.4.  Costs and Expenses.  The Borrower shall, whether or not
                        ------------------                                     
the transactions contemplated hereby shall be consummated:

                                     -73-
<PAGE>
 
          (a)    pay or reimburse Bank of America (including in its capacity as
     Administrative Agent) and the Lead Arranger promptly after demand for all
     reasonable out-of-pocket costs and expenses incurred by Bank of America
     (including in its capacity as Administrative Agent) in connection with the
     development, preparation, delivery, syndication, administration and
     execution of, and any amendment, supplement, waiver or modification to (in
     each case, whether or not consummated), this Agreement, any Loan Document
     and any other documents prepared in connection herewith or therewith, and
     the consummation of the transactions contemplated hereby and thereby,
     including the Attorney Costs incurred by Bank of America (including in its
     capacity as Administrative Agent) with respect thereto; provided that Bank
                                                             --------          
     of America (including in its capacity as Administrative Agent) and the Lead
     Arranger shall not be entitled to reimbursement for costs and expenses
     associated with assignments and participations by any Lender after the
     Closing Date with the exception of assignments or participations arranged
     at the request of the Borrower including assignments pursuant to Section
                                                                      -------
     2.22;
     ---- 

          (b)    pay or reimburse each Lender, the Issuing Lender and the
     Administrative Agent within five (5) Business Days after demand for all
     costs and expenses incurred by them in connection with the enforcement,
     attempted enforcement, or preservation of any rights or remedies (including
     in connection with any "workout" or restructuring regarding the Loans and
     other Obligations, and including in any Insolvency Proceeding or appellate
     proceeding) under this Agreement, any other Loan Document, and any such
     other documents, including Attorney Costs incurred by the Administrative
     Agent, the Issuing Lender and any Lender; and

          (c)    pay or reimburse Bank of America (including in its capacity as
     Administrative Agent) within five (5) Business Days after demand for all
     reasonable appraisal (including the reasonable allocated cost of internal
     appraisal services), audit, environmental inspection and review (including
     the allocated cost of such internal services), search and filing costs,
     fees and expenses which are reasonably incurred or sustained by Bank of
     America (including in its capacity as Administrative Agent) in connection
     with the matters referred to under subsections (a) and (b) of this Section.
                                        ---------------     ---                 

          SECTION 9.5.  Setoff.  In addition to and not in limitation of any
                        ------                                              
rights of any Lender under Applicable Law, each Lender shall, upon the
occurrence and during the continuance of any Event of Default described in
Section 7.1(a) or Section 7.1(e), have the right to appropriate and apply to the
- --------------    --------------                                                
payment of the Obligations then due and unpaid, and, as security for such
Obligations, the Borrower hereby grants to each Lender a continuing security
interest in, any and all deposits or accounts of the Borrower then or thereafter
maintained with such Lender or participant; provided that any such appropriation
                                            --------                            
and application shall be subject to the provisions of Section 2.17.  Each Lender
                                                      ------------              
agrees promptly to notify the Borrower and the Administrative Agent after any
such setoff and application made by such Lender; provided that the failure to
                                                 --------                    
give such notice shall not affect the validity of such setoff and application.
The rights of each Lender under this Section 9.5 are in addition to other rights
                                     -----------                                
and remedies (including other rights of setoff) which such Lender may have.

                                     -74-
<PAGE>
 
          SECTION 9.6.  Binding Effect.  This Agreement shall become effective
                        --------------
when it shall have been executed by the Borrower and the Administrative Agent
and when the Administrative Agent shall have been notified by each Lender that
such Lender has executed it, and thereafter shall be binding upon and inure to
the benefit of each of the Borrower, the Administrative Agent and each Lender
and their respective successors and assigns, except that the Borrower shall not
have the right to assign its rights hereunder or any interest herein without the
prior written consent of the Lenders.

          SECTION 9.7.  Assignments, Participations, etc.
                        -------------------------------- 

          (a)    Any Lender may at any time, with the written consent of the
     Borrower and the Administrative Agent, which consents shall not be
     unreasonably withheld, assign and delegate to one or more Eligible
     Assignees (provided that no written consent of the Borrower or the
                --------                                               
     Administrative Agent shall be required at any time when an Event of Default
     exists, or in connection with any assignment and delegation by a Lender to
     a Lender Affiliate of such Lender) (each an "Assignee") all, or any ratable
                                                  --------                      
     part of all, of the Loans, interests in Letters of Credit, the Commitment
     and the other rights and obligations of such Lender hereunder, in a minimum
     amount of $5,000,000 and integral multiples of $500,000 in excess of such
     amount or, if less, all of such Loans, interests in Letters of Credit, the
     Commitment and the other rights and obligations of such Lender hereunder;
     provided that (i) the Borrower, the Administrative Agent and the Issuing
     --------                                                                
     Lender may continue to deal solely and directly with such Lender in
     connection with the interest so assigned to an Assignee until (A) written
     notice of such assignment, together with payment instructions, addresses
     and related information with respect to the Assignee, shall have been given
     to the Borrower and the Administrative Agent by such Lender and the
     Assignee; (B) such Lender and its Assignee shall have delivered to the
     Borrower and the Administrative Agent an Assignment and Acceptance; and (C)
     the assignor Lender or Assignee has paid to the Administrative Agent a
     processing fee in the amount of $3,500 and (ii) the First Preferred Fleet
     Mortgages and the Second Preferred Fleet Mortgages shall be amended of
     record to the extent deemed necessary by the Administrative Agent and its
     counsel to reflect the deletion and/or addition of Lenders' names in such
     instruments.

          (b)    From and after the date that the Administrative Agent notifies
     the assignor Lender that it has received an executed Assignment and
     Acceptance and payment of the above-referenced processing fee, (i) the
     Assignee thereunder shall be a party hereto and, to the extent that rights
     and obligations hereunder have been assigned to it pursuant to such
     Assignment and Acceptance, shall have the rights and obligations of a
     Lender under the Loan Documents, and (ii) the assignor Lender shall, to the
     extent that rights and obligations hereunder and under the other Loan
     Documents have been assigned by it pursuant to such Assignment and
     Acceptance, relinquish its rights and be released from its obligations
     under the Loan Documents.

          (c)    Immediately upon each Assignee's making its processing fee
     payment under the Assignment and Acceptance, this Agreement shall be deemed
     to be amended to

                                     -75-
<PAGE>
 
     the extent, but only to the extent, necessary to reflect the addition of
     the Assignee and the resulting adjustment of the Commitment arising
     therefrom. The Commitment allocated to each Assignee shall reduce such
     Commitment of the assigning Lender pro tanto.
                                        --- ----- 

          (d) The Administrative Agent shall maintain at its address referred to
     in Section 9.2 a copy of each Assignment and Acceptance delivered to and
        -----------                                                          
     accepted by it and a register for the recordation of the names and
     addresses of the Lenders, the Commitments, the principal amount of Loans
     owing to, and the face amount of the Letters of Credit issued by the
     Issuing Lender from time to time (the "Register"). The entries in the
                                            --------                       
     Register shall be conclusive and binding for all purposes, absent manifest
     error, and the Borrower, the Administrative Agent, the Issuing Lender and
     the Lenders may treat each Person whose name is recorded in the Register as
     a Lender hereunder for all purposes of this Agreement. The Register shall
     be available for inspection by the Borrower or any Lender at any reasonable
     time and from time to time upon reasonable prior notice.

          (e) Any Lender may at any time sell to one or more commercial banks or
     other Persons not Affiliates of the Borrower (a "Participant")
                                                      -----------  
     participating interests in any Loans and Letters of Credit, the Commitment
     of that Lender and the other interests of that Lender (the "originating
                                                                 -----------
     Lender") hereunder and under the other Loan Documents; provided that (i)
     ------                                                 --------         
     the originating Lender's obligations under this Agreement shall remain
     unchanged, (ii) the originating Lender shall remain solely responsible for
     the performance of such obligations, (iii) the Borrower, the Administrative
     Agent and the Issuing Lender shall continue to deal solely and directly
     with the originating Lender in connection with the originating Lender's
     rights and obligations under this Agreement and the other Loan Documents,
     and (iv) no Lender shall transfer or grant any participating interest under
     which the Participant shall have rights to approve any amendment to, or any
     consent or waiver with respect to, this Agreement or any other Loan
     Document, except to the extent such amendment, consent or waiver would
     extend the maturity or reduce the principal amount of, the rate of interest
     on or any fee payable with respect to the Loans or other obligations in
     which such Participant shall have purchased a Participation. In the case of
     any such Participation, the Participant shall not have any rights under
     this Agreement, or any of the other Loan Documents, and all amounts payable
     by the Borrower hereunder shall be determined as if such Lender had not
     sold such participation; except that, if amounts outstanding under this
     Agreement are due and unpaid, or shall have been declared or shall have
     become due and payable upon the occurrence of an Event of Default, each
     Participant shall be deemed to have the right of set-off in respect of its
     participating interest in amounts owing under this Agreement to the same
     extent as if the amount of its participating interest were owing directly
     to it as a Lender under this Agreement.

          (f) Each Lender agrees to use its reasonable best efforts, including
     to take normal and reasonable precautions and exercise due care, to
     maintain the confidentiality of all information identified as
     "confidential" by the Borrower and provided to it by the Borrower or any
     subsidiary of the Borrower, or by the Administrative Agent on the
     Borrower's or Subsidiary's behalf, in connection with this Agreement or any
     other Loan 

                                     -76-
<PAGE>
 
     Document (and, regardless of whether it is identified as "confidential", 
     all financial statements, budgets and projections received by the Lenders
     pursuant to Section 6.4(g)), and neither it nor any of its Affiliates shall
                 --------------                                
     use any such information for any purpose or in any manner other than
     pursuant to the terms contemplated by this Agreement; except to the extent
     such information (i) was or becomes generally available to the public other
     than as a result of a disclosure by the Lender, or (ii) was or becomes
     available on a non-confidential basis from a source other than the
     Borrower; provided that such source is not bound by a confidentiality
               --------                                                   
     agreement with the Borrower known to the Lender; provided that any Lender
                                                      --------                
     may disclose such information (A) at the request or pursuant to any
     requirement of any Governmental Authority to which such Lender is subject
     or in connection with an examination of such Lender by any such authority;
     (B) pursuant to subpoena or other court process; (C) when required to do so
     in accordance with the provisions of any applicable Requirement of Law; and
     (D) to such Lender's independent auditors and other professional advisors.
     Notwithstanding the foregoing, the Borrower authorizes each Lender to
     disclose to any Participant or Assignee (each, a "Transferee") and to any
                                                       ----------             
     prospective Transferee, such financial and other information in such
     Lender's possession concerning the Borrower or its Subsidiaries which has
     been delivered to Administrative Agent or the Lenders pursuant to this
     Agreement or which has been delivered to the Administrative Agent or Lender
     by the Borrower in connection with such Lender's credit evaluation of the
     Borrower prior to entering into this Agreement; provided that, unless
                                                     --------             
     otherwise agreed by the Borrower, such Transferee executes and delivers to
     the Borrower a confidentiality agreement under the terms of which such
     Transferee shall agree to keep such information confidential to the same
     extent required of the Lenders hereunder.

          (g) Notwithstanding any other provision contained in this Agreement or
     any other Loan Document to the contrary, any Lender may assign all or any
     portion of the Loans held by it to any Federal Reserve Bank or the United
     States Treasury as collateral security pursuant to Regulation A of the
     Board of Governors of the Federal Reserve System and any Operating Circular
     issued by such Federal Reserve Bank; provided that any payment in respect
                                          --------                            
     of such assigned Loans made by the Borrower to or for the account of the
     assigning or pledging Lender in accordance with the terms of this Agreement
     shall satisfy the Borrower's obligations hereunder in respect to such
     assigned Loans to the extent of such payment. No such assignment shall
     release the assigning Lender from its obligations hereunder.

          SECTION 9.8.  Survival of Warranties and Agreements. All agreements,
                        -------------------------------------                 
representations and warranties made herein shall survive the execution and
delivery of this Agreement and the other Loan Documents and the making and
repayment of the Obligations hereunder.

          SECTION 9.9.  Marshalling; Recourse to Security; Payments Set Aside.
                        -----------------------------------------------------  
Neither any Lender nor the Administrative Agent shall be under any obligation to
marshall any assets in favor of the Borrower or any other Loan Party or against
or in payment of any or all of the Obligations. Recourse to security shall not
be required at any time. To the extent that any


                                     -77-
<PAGE>
 
Loan Party makes a payment or payments to the Administrative Agent or the
Lenders, or the Administrative Agent or the Lenders enforce their security
interests or exercise their rights of set-off, and such payment or payments or
the proceeds of such enforcement or set-off or any part thereof are subsequently
invalidated, declared to be fraudulent or preferential, set aside and/or
required to be repaid to a trustee, receiver or any other party under any
bankruptcy law, state or federal law, common law or equitable cause, then to the
extent of such recovery, the obligation or part thereof originally intended to
be satisfied, and all Liens, rights and remedies therefor, shall be revived and
continued in full force and effect as if such payment had not been made or such
enforcement or set-off had not occurred.

          SECTION 9.10.  Indemnification.  Whether or not the transactions
                         ---------------                                  
contemplated hereby shall be consummated:

          (a)    General Indemnity.  The Borrower shall pay, indemnify, and hold
                 -----------------                                              
     each Lender, the Issuing Lender, the Administrative Agent, the Lead
     Arranger and its successors and assigns, and each of their respective
     officers, directors, employees, counsel, agents and attorneys-in-fact
     (each, an "Indemnified Person") harmless from and against any and all
                ------------------
     liabilities, obligations, losses, damages, penalties, actions, judgments,
     suits, costs, charges, expenses or disbursements (including Attorney Costs)
     of any kind or nature whatsoever with respect to the execution, delivery,
     enforcement, performance and administration of this Agreement and any other
     Loan Documents, or the transactions contemplated hereby and thereby, and
     with respect to any investigation, litigation or proceeding (including any
     Insolvency Proceeding or appellate proceeding) related to this Agreement,
     the Loans, the Letters of Credit or the use of the proceeds thereof,
     whether or not any Indemnified Person is a party thereto (all the
     foregoing, collectively, the "Indemnified Liabilities"); provided that the
                                   -----------------------    --------
     Borrower shall have no obligation hereunder to an Indemnified Person with
     respect to Indemnified Liabilities arising from the gross negligence, bad
     faith or willful misconduct of such Indemnified Person.

          (b)    Environmental Indemnity.
                 ----------------------- 

                 (i)   The Borrower hereby agrees to indemnify, defend and hold
          harmless each Indemnified Person from and against any and all
          liabilities, obligations, losses, damages, penalties, actions,
          judgments, suits, costs, charges, expenses or disbursements (including
          Attorney Costs and the allocated cost of internal environmental audit
          or review services), which may be incurred by or asserted against such
          Indemnified Person in connection with or arising out of any pending or
          threatened investigation, litigation or proceeding, or any action
          taken by any Person, with respect to any Environmental Claim arising
          out of or related to any Property subject to a Lien in favor of the
          Administrative Agent or any Lender.

                 (ii)  In no event shall any site visit, observation, or testing
          by the Administrative Agent or any Lender be deemed a representation
          or warranty that Hazardous Materials are or are not present in, on, or
          under the site, or that there has been or shall be compliance with any
          Environmental Law. Neither the 


                                     -78-
<PAGE>
 
          Borrower nor any other Person is entitled to rely on any site visit,
          observation, or testing by the Administrative Agent or any Lender.
          Neither the Administrative Agent nor any Lender owes any duty of care
          to protect the Borrower or any other Person against, or to inform the
          Borrower or any other party of, any Hazardous Materials or any other
          adverse condition affecting any site or Property. Neither the
          Administrative Agent nor any Lender shall be obligated to disclose to
          the Borrower or any other Person any report or findings made as a
          result of, or in connection with, any site visit, observation, or
          testing by the Administrative Agent or any Lender.

          (c)    Survival; Defense.  The obligations in this Section 9.10 shall
                 -----------------                           ------------      
     survive payment of all other Obligations.  At the election of any
     Indemnified Person, the Borrower shall defend such Indemnified Person using
     legal counsel satisfactory to such Indemnified Person in such Person's sole
     discretion, at the sole cost and expense of the Borrower. All amounts
     owing under this Section 9.10 shall be paid within thirty (30) days after
                      ------------                                            
     demand.

          SECTION 9.11.  Consent to Jurisdiction and Service of Process; Waiver
                         ------------------------------------------------------
of Jury Trial.  All judicial proceedings brought against any party to this
- -------------                                                             
Agreement with respect to this Agreement or any other Loan Document may be
brought in any state or federal court of competent jurisdiction in the State of
Illinois, and by execution and delivery of this Agreement, each party accepts,
for itself and in connection with its properties, generally and unconditionally,
the nonexclusive jurisdiction of the aforesaid courts, and irrevocably agrees to
be bound by any final judgment rendered thereby in connection with this
Agreement or any of the other Loan Documents from which no appeal has been taken
or is available. Each party irrevocably consents to the service of process of
any of the aforementioned courts in any such action or proceeding by the mailing
of copies thereof by registered or certified mail, postage prepaid, to its
notice address specified on the signature pages hereof, such service to become
effective ten (10) days after such mailing. EACH LOAN PARTY, THE ISSUING LENDER,
THE ADMINISTRATIVE AGENT, AND EACH LENDER IRREVOCABLY WAIVES (A) TRIAL BY JURY
IN ANY ACTION OR PROCEEDING WITH RESPECT TO THIS AGREEMENT OR ANY OTHER LOAN
DOCUMENT, AND (B) ANY OBJECTION (INCLUDING ANY OBJECTION TO THE LAYING OF VENUE
OR BASED ON THE GROUNDS OF FORUM NON CONVENIENS) WHICH IT MAY NOW OR HEREAFTER
HAVE TO THE BRINGING OF ANY SUCH ACTION OR PROCEEDING WITH RESPECT TO THIS
AGREEMENT OR ANY OTHER LOAN DOCUMENT IN ANY JURISDICTION SET FORTH ABOVE.
Nothing herein shall affect the right to serve process in any other manner
permitted by law or shall limit the right of the Administrative Agent or any
Lender or any Loan Party to bring proceedings against any Loan Party in the
courts of any other jurisdiction.

          SECTION 9.12.  Performance of Obligations.  Each Loan Party agrees
                         --------------------------                         
that the Administrative Agent, the Issuing Lender and the Lenders, or any one or
more of them, may, but shall have no obligation to, make any payment or perform
any act required of such Loan Party under any Loan Document or take any other
action which such party in its discretion deems necessary or desirable to
protect or preserve the Collateral, including any action to pay or 


                                     -79-
<PAGE>
 
discharge taxes, liens, security interests or other encumbrances levied or
placed on or threatened against any Collateral.

          SECTION 9.13.  Construction.  The parties acknowledge that each party
                         ------------                                          
and its counsel have reviewed and revised this Agreement and the other Loan
Documents and that the normal rule of construction to the effect that any
ambiguities are to be resolved against the drafting party shall not be employed
in the interpretation of the Loan Documents or any amendments or exhibits
thereto.

          SECTION 9.14.  GOVERNING LAW.  THIS AGREEMENT, THE OTHER LOAN
                         -------------                                 
DOCUMENTS, AND THE LETTERS OF CREDIT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF ILLINOIS WITHOUT REGARD TO ITS
CONFLICTS OF LAW PRINCIPLES.

          SECTION 9.15.  Execution in Counterparts.  This Agreement may be
                         -------------------------                        
executed in any number of counterparts and by different parties hereto in
separate counterparts, each of which when so executed shall be deemed to be an
original and all of which taken together shall constitute one and the same
agreement.

          SECTION 9.16.  Entire Agreement.  This Agreement, together with the
                         ----------------                                    
other Loan Documents, embodies the entire agreement and understanding among the
Loan Parties, the Lenders, the Issuing Lender and the Administrative Agent, and
supersedes all prior or contemporaneous agreements and understandings of such
Persons, verbal or written, relating to the subject matter hereof and thereof,
except for the Fee Letter, and any prior arrangements made with respect to the
payment by the Borrower of (or any indemnification for) any fees, costs or
expenses payable to or incurred (or to be incurred) by or on behalf of the
Administrative Agent or the Lenders.


                                   * * * * *

                                     -80-
<PAGE>
 
          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be executed by their respective officers thereunto duly authorized, as of the
Closing Date.



                                            GREAT LAKES DREDGE & DOCK 
                                            CORPORATION


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------


                                            BANK OF AMERICA NATIONAL TRUST AND 
                                            SAVINGS ASSOCIATION,
                                             as the Administrative Agent


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------


                                            BANK OF AMERICA NATIONAL TRUST AND 
                                            SAVINGS ASSOCIATION,
                                             as the Issuing Lender and a Lender


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------


                                            BANK OF MONTREAL, CHICAGO BRANCH,
                                             as the Documentation Agent and as a
                                             Lender


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------


                                      S-
                                        ---
<PAGE>
 
                                            COMERICA BANK,
                                             as a Lender


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------





                                      S-
                                        ---
<PAGE>
 
                                            FLEET BANK, N.A.,
                                             as a Lender



                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------



                                      S-
                                        ---
<PAGE>
 
                                            LASALLE NATIONAL BANK,
                                             as a Lender


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------
<PAGE>
 
                                            THE NORTHERN TRUST COMPANY,
                                             as a Lender


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------



                                      S-
                                        ---
<PAGE>
 
                                            SUMMIT BANK,
                                             as a Lender


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------


                                      S-
                                        ---
<PAGE>
 
          The following Persons are signatories to this Agreement in their
capacities as Loan Parties and not as Borrower.


                                            GREAT LAKES INTERNATIONAL, INC.


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------


                                            GREAT LAKES DREDGE & DOCK COMPANY


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------


                                            DAWSON DREDGING COMPANY


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------


                                            FIFTY-THREE DREDGING CORPORATION


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------


                                            GATES CONSTRUCTION CORP.


                                            By:
                                               ---------------------------
                                               Name: 
                                                    ----------------------
                                               Title: 
                                                     ---------------------




                                      S-
                                        --- 
<PAGE>
 
                                  EXHIBIT A*                                  
                                  ---------

                       FORM OF ASSIGNMENT AND ACCEPTANCE

                         Dated ____________ ___, ____


          Reference is hereby made to the Credit Agreement dated as of August
19, 1998[, heretofore amended] (the "Credit Agreement") among Great Lakes Dredge
                                     ----------------                           
& Dock Corporation, a Delaware corporation (the "Borrower"), the other Loan
                                                 --------                  
Parties (as defined in the Credit Agreement), the Lenders (as defined in the
Credit Agreement), and Bank of America National Trust and Savings Association,
as the Administrative Agent for the Lenders (the "Administrative Agent"), and as
                                                  --------------------          
the Issuing Lender.  Terms defined in the Credit Agreement are used herein as
therein defined.

          _____________ (the "Assignor") and ____________ (the "Assignee") agree
as follows:

          1.   As of the Effective Date (as defined below), the Assignor hereby
sells and assigns to the Assignee, and the Assignee hereby purchases and assumes
from the Assignor, that certain interest of the Assignor in and to:


     __% of the Loans owing to the Assignor;
     __% of the Assignor's Commitment;
     __% of the interests in outstanding Letters of Credit in
           which the Assignor is a participant pursuant to the terms
           of the Credit Agreement ("Letter of Credit
                                    ----------------
           Participation");
           -------------   



and all of the other rights and obligations of the Assignor under the Credit
Agreement and not explicitly mentioned above.  After giving effect to such sale
and assignment, (i) the Assignee's Commitment, the amount of Loans owing to the
Assignee and the amount of Letter of Credit Participations held by the Assignee
will be as set forth in Section 1 of Schedule 1, and (ii) the Assignee's
                                     ----------                         
Percentage will be as set forth in Section 2 of Schedule 1.  The assignment set
                                                ----------                     
forth in this paragraph shall be without recourse to, or representation or
warranty (except as expressly provided in this Assignment and Acceptance) by,
the Assignor.

          2.   The Assignor (i) represents and warrants that it is the legal and
beneficial owner of the interest being assigned by it hereunder and that such
interest is free and clear of any adverse claim; (ii) makes no representation or
warranty and assumes no responsibility with respect to any statements,
warranties or representations made in or in connection with the Credit Agreement
or the execution, legality, validity, enforceability, genuineness, sufficiency
or value of 

- --------------------
*Please note requirement of Section 9.7(a) of the Credit Agreement that the ship
mortgages may need to reflect the addition or deletion of the names of the
Lenders party to the assignment.
<PAGE>
 
the Credit Agreement or any other instrument or document furnished
pursuant thereto; and (iii) makes no representation or warranty and assumes no
responsibility with respect to the financial condition of the Borrower or its
Affiliates or the performance or observance by the Borrower or its Affiliates of
any of their respective obligations under the Credit Agreement or any other
instrument or document furnished pursuant thereto.

          3.   The Assignee (i) confirms that it has received a copy of the
Credit Agreement, together with copies of all financial information and such
other documents and information as it has deemed appropriate to make its own
credit analysis and decision to enter into this Assignment and Acceptance; (ii)
agrees that it will, independently and without reliance upon the Administrative
Agent, the Assignor or any other Lender and based on such documents and
information as it shall deem appropriate at the time, continue to make its own
credit decisions in taking or not taking action under the Credit Agreement;
(iii) confirms that it is an Eligible Assignee; (iv) appoints and authorizes the
Administrative Agent to take such action as its representative and to exercise
such powers under the Credit Agreement as are delegated to the Administrative
Agent by the terms thereof, together with such powers as are reasonably
incidental thereto; (v) agrees that it will perform in accordance with their
terms all of the obligations which by the terms of the Credit Agreement are
required to be performed by it as a Lender; [and] (vi) specifies as its Domestic
Lending Office (and address for notices) and Eurodollar Office the offices set
forth beneath its name on the signature pages hereof [and (vii) assumes no
duties or obligations held by the Assignor in its capacity as Administrative
Agent under the Credit Agreement]** [and (viii) attaches the forms prescribed by
the Internal Revenue Service of the United States certifying as to the
Assignee's status for purposes of determining exemption from United States
withholding taxes with respect to all payments to be made to the Assignee under
the Credit Agreement or such other documents as are necessary to indicate that
all such payments are subject to such rates at a rate reduced by an applicable
tax treaty]***.

          4.   Following the execution of this Assignment and Acceptance by the
Assignor and the Assignee, it will be delivered to the Administrative Agent for
acceptance and recording by the Administrative Agent.  The effective date of
this Assignment and Acceptance shall be the date of acceptance thereof by the
Administrative Agent, unless otherwise specified on Schedule 1 hereto (the
                                                    ----------            
"Effective Date"); provided that all of the requirements for an assignment set
 --------------    --------                                                   
forth in Section 9.7 of the Credit Agreement shall have been satisfied as of
such date.

          5.   Upon such acceptance and recording by the Administrative Agent,
as of the Effective Date, (i) the Assignee shall be a party to the Credit
Agreement and, to the extent provided in this Assignment and Acceptance, have
the rights and obligations of a Lender thereunder, and (ii) the Assignor shall,
to the extent provided in this Assignment and Acceptance, relinquish its rights
and be released from its obligations under the Credit Agreement.


- -----------------------------
**    If the Assgnor is the Administrative Agent.
***   If the Assignee is organized under the laws of a jurisdiction outside the
United States.  
<PAGE>
 
          6.   Upon such acceptance and recording by the Administrative Agent,
from and after the Effective Date, the Administrative Agent shall make all
payments under the Credit Agreement in respect of the interest assigned hereby
(including all payments of principal, interest and fees with respect thereto) to
the Assignee.  The Assignor and Assignee shall make all appropriate adjustments
in payments under the Credit Agreement for periods prior to the Effective Date
directly between themselves.

          7.   This Assignment and Acceptance shall be governed by, and
construed in accordance with, the laws of the State of Illinois.


                                    * * * *
<PAGE>
 
          IN WITNESS WHEREOF, the parties hereto have caused this Assignment and
Acceptance to be executed by their respective officers thereunto duly
authorized, as of the date first above written, such execution being made on
Schedule 1 hereto.
- ----------        



                                       [NAME OF ASSIGNOR]



                                       By: ___________________________
                                       Title:


                                       [NAME OF ASSIGNEE]



                                       By: ___________________________
                                       Title:



                                       GREAT LAKES DREDGE & DOCK
                                       CORPORATION



                                       By: ___________________________
                                       Title:

Accepted this ___ day
of ______________, ____

BANK OF AMERICA NATIONAL TRUST
AND SAVINGS ASSOCIATION,
 as Administrative Agent


By: _________________________

   Title:
<PAGE>
 
                                  Schedule 1

                                      to

                           Assignment and Acceptance

                         Dated _______________ __, ____


Section 1.
- --------- 

               Assignee's Commitment:            $__________



        Aggregate Outstanding Principal
         Amount of Revolving Loans owing to the

         Assignee:                               $__________


        Aggregate Outstanding Principal
         Amount of Term Loans owing to the

         Assignee:                               $__________



        Aggregate Outstanding Amount of
         Letter of Credit Participations
         held by the Assignee:                   $__________


Section 2.
- --------- 


        Assignee's Percentage*:                  __________%


Section 3.
- --------- 


        Effective Date**:  ___________ __, _____








- --------------------------

*       A fraction equal to Assignee's Commitment divided by the Commitments of
        all of the Lenders, rounded upwards to the nearest whole multiple of
        1/10,000.
**      This date should be no earlier than the date of acceptance by the
        Administrative Agent.

                                                                          
<PAGE>
 
                                   EXHIBIT B
                                   ---------

                          FORM OF NOTICE OF BORROWING



Bank of America National Trust and
 Savings Association, as Administrative
 Agent for the Lenders parties to the
 Credit Agreement referred to below
231 South LaSalle Street
Chicago, Illinois  60697
Attention:  ________________


                                    [Date]


Ladies and Gentlemen:

             The undersigned, GREAT LAKES DREDGE & DOCK CORPORATION, refers to
the Credit Agreement, dated as of August 19, 1998[, as heretofore amended] (the
                                                                           
"Credit Agreement," the terms defined therein being used herein as therein
- -----------------                                                         
defined), among the undersigned, the other Loan Parties, the Lenders parties
thereto, and Bank of America National Trust and Savings Association, as
Administrative Agent for the Lenders, and as the Issuing Lender, and hereby
gives you notice, irrevocably, pursuant to Section 2.4 of the Credit Agreement
                                           -----------                        
that the undersigned hereby requests a Borrowing under the Credit Agreement, and
in that connection sets forth below the information relating to such Borrowing
(the "Proposed Borrowing") as required by Section 2.4 of the Credit Agreement:
      ------------------                  -----------                         


             [Revolving][Term] Loans to be made on ________________, ____:


             (1)  Base Rate Loans                          $______________
             (2)  Eurodollar Rate Loans                    $______________

                             Total                         $______________
                             -----                 


The Interest Period for the Eurodollar Rate Loans described above in clause (2)
shall be ____ months.

             The undersigned hereby certifies that the following statements are
true on the date hereof, and will be true on the date of the Proposed Borrowing:

             (a)    the representations and warranties contained in Loan
     Documents are correct in all material respects, both before and after
     giving effect to the Proposed Borrowing and to the application of the
     proceeds therefrom, as though made on and as of
<PAGE>
 
 each such date (other than those which are
 specified as being made only as of a stated earlier date);

             (b)    no event has occurred and is continuing, or would result
from the Proposed Borrowing or from the application of the proceeds therefrom,
which constitutes a Default or an Event of Default; and

             (c)    the aggregate principal amount of Revolving Loans
outstanding plus the Letter of Credit Obligations will not exceed the Revolving
            ----
Commitment Amount, both before and after giving effect to the Proposed
Borrowing.
          
                                           Very truly yours,

                                           GREAT LAKES DREDGE & DOCK
                                           CORPORATION



                                           By:__________________________
                                              Title:





                                    -S-   -
                                       ---
<PAGE>
 
                                   EXHIBIT C
                                   ---------

                    FORM OF CONTINUATION/CONVERSION NOTICE


Bank of America National Trust and Savings Association,
 as Administrative Agent for the Lenders
 parties to the Credit
 Agreement referred to below
231 South LaSalle Street
Chicago, Illinois  60697
Attention:  ______________

                                    [Date]


Ladies and Gentlemen:

             The undersigned, GREAT LAKES DREDGE & DOCK CORPORATION, refers to
the Credit Agreement, dated as of August19, 1998[, as heretofore amended] (the
                                                                          
"Credit Agreement"; the terms defined therein being used herein as therein
- -----------------                                                         
defined), among the undersigned, the other Loan Parties, the Lenders parties
thereto, and Bank of America National Trust and Savings Association, as
Administrative Agent for the Lenders, and as the Issuing Lender, and hereby
gives you notice, irrevocably, pursuant to Section 2.6 of the Credit Agreement
                                           -----------                        
that the undersigned hereby requests that on _____________, ____:

             (1)  $______________________ of the presently outstanding amount of
[Base Rate Loans] [Eurodollar Rate Loans having an Interest Period expiring on
_____________, ____] consisting of [Revolving][Term] Loans:

             (2)  be [converted into] [continued as],

             [ ]  Base Rate Loans in the aggregate principal amount of
             $____________ and

             [ ]  Eurodollar Rate Loans in the aggregate principal amount of
             $___________________ having an Interest Period of ________
             months.
<PAGE>
 
             The undersigned hereby certifies that both immediately before and
immediately after giving effect to the conversion or continuation of the Loans
as requested herein, and the application of the proceeds therefrom, no Default
or Event of Default shall exist or be continuing.


                                       GREAT LAKES DREDGE & DOCK
                                       CORPORATION



                                       By: ____________________________

                                           Title: _______________________
<PAGE>
 
                                   EXHIBIT D
                                   ---------

                       FORM OF LETTER OF CREDIT REQUEST



Bank of America National Trust and Savings Association,
 as Issuing Lender under
 the Credit Agreement
 referred to below
231 South LaSalle Street
Chicago, Illinois  60697
Attention:  _______________


                                    [Date]


Ladies and Gentlemen:


             The undersigned, Great Lakes Dredge & Dock Corporation, refers to
the Credit Agreement, dated as of August 19, 1998 [, as heretofore amended] (the
                                                                             
"Credit Agreement"; the terms defined therein being used herein as therein
- -----------------                                                         
defined), among the undersigned, the other Loan Parties, the Lenders parties
thereto, and Bank of America National Trust and Savings Association, as
Administrative Agent for the Lenders, and as the Issuing Lender, and hereby
gives you notice, irrevocably, pursuant to Section 3.2 of the Credit Agreement
                                           -----------                        
that the undersigned hereby requests the issuance of a Letter of Credit under
the Credit Agreement (the "Requested Letter of Credit"), and in that connection
                           --------------------------                          
sets forth below the information relating to the Requested Letter of Credit as
required by Section 3.2(a) of the Credit Agreement:
            --------------                         

              (i)   the Business Day of the issuance of the Requested Letter of
          Credit is ____________ ___, ____;

              (ii)  the expiry date of the Requested Letter of Credit is
          _____________ __, ____, which is on or prior to the Revolving
          Commitment Termination Date;

              (iii) the beneficiary of the Requested Letter of Credit is
          ________________;

              (iv)  the aggregate face amount of the Requested Letter of Credit
          is _______________ (specify Dollars or the Alternative Currency in
          which the Requested Letter of Credit is to be denominated);

              (v)   the Requested Letter of Credit is a [Financial]
          [Performance] Letter of Credit; and

              (vi)  the conditions for drawing to be included in the Requested
          Letter of Credit are as follows:
<PAGE>
 
              The undersigned hereby certifies that the following statements are
true on the date hereof, and will be true on the date of the issuance of the
Requested Letter of Credit:

              (i)   the representations and warranties contained in the Loan
     Documents are correct in all material respects, both before and after
     giving effect to the issuance of the Requested Letter of Credit, as though
     made on and as of each such date (other than those which are specified as
     being made only as of a stated earlier date);

              (ii)  no event has occurred and is continuing, or would result
     from the issuance of such Letter of Credit, which constitutes a Default or
     an Event of Default; and

              (iii) the Letter of Credit Obligations will not exceed the Letter
     of Credit Availability, both before and after giving effect to the issuance
     of the Requested Letter of Credit.


                                            Very truly yours,



                                            GREAT LAKES DREDGE & DOCK
                                            CORPORATION



                                            By: ___________________________

                                                Title: ______________________




                                    -S-  -
                                      ---
<PAGE>
 
                                   EXHIBIT E
                                   ---------

                   FORM OF OPINION OF THE BORROWER'S COUNSEL

                                   Attached.
<PAGE>
 
                                   EXHIBIT F
                                   ---------

                        FORM OF COMPLIANCE CERTIFICATE



            I, ________________________, hereby do certify on behalf of Great
Lakes Dredge & Dock Corporation., a Delaware corporation ( the "Borrower"), in
                                                                --------      
my capacity solely as an officer of the Borrower and not in my individual
capacity, pursuant to the Credit Agreement dated as of August 19, 1998 [, as
heretofore amended] (the "Credit Agreement"), by and among the Borrower, the
                          ----------------                                  
other Loan Parties (as defined in the Credit Agreement), the financial
institutions party to the Credit Agreement (the "Lenders"), and Bank of America
                                                 -------                       
National Trust and Savings Association, in its capacity as the Issuing Lender
and in its capacity as the Administrative Agent for the Lenders, as follows:

            1.   I am the duly elected, qualified and acting _______________ of
the Borrower.

            2.   No Default or Event of Default has occurred and is continuing
under the Credit Agreement on the date hereof.

            3.   This certificate is the "Compliance Certificate" required to be
delivered pursuant to Section 6.4(d) of the Credit Agreement [for the Fiscal
                      --------------                                        
Quarter ending _________, ____] [for the Fiscal Year ending _________, ____].
For the fiscal period covered by this certificate, the Borrower and its
consolidated Subsidiaries have complied with each of the covenants contained in
                                                                               
Section 6.3 of the Credit Agreement.
- -----------                         

            4.   Set forth on Schedules A through E hereto are the calculations
which provide the basis for the certification in paragraph 3 above.

            Terms which are capitalized but not otherwise defined herein shall
have the meanings ascribed to such terms in the Credit Agreement.


            IN WITNESS WHEREOF, the undersigned has executed this Certificate as
of the ____ day of _________, ____.



                                       GREAT LAKES DREDGE & DOCK
                                       CORPORATION


                                       By: _____________________
                                           Title:  _____________
<PAGE>
 
                                  Schedule A
                                  ----------

                             Capital Expenditures
                             --------------------
<PAGE>
 
                                  Schedule B
                                  ----------

                                 Total Leverage
                                 --------------
<PAGE>
 
                                  Schedule C
                                  ----------

                                Senior Leverage
                                ---------------
<PAGE>
 
                                  Schedule D
                                  ----------

                            Interest Coverage Ratio
                            -----------------------
<PAGE>
 
                                  Schedule E
                                  ----------

                     Certain Existing Leases and Subleases
                     -------------------------------------
<PAGE>
 
                                  SCHEDULE I
                                  ----------

                                  DEFINITIONS
                                  -----------



          "1933 Act" means the Securities Act of 1933, as amended from time to
           --------                                                           
time.

          "1934 Act" means the Securities Exchange Act of 1934, as amended from
           --------                                                            
time to time.

          "Administrative Agent" has the meaning specified in the preamble.
           --------------------                                   -------- 

          "Administrative Agent-Related Persons" means Bank of America and any
           ------------------------------------                               
successor Administrative Agent arising under Section 8.9, together with their
                                             -----------                     
respective Affiliates, and the officers, directors, employees, agents and
attorneys-in-fact of such Persons and Affiliates.

          "Affiliate" means, with respect to any Person, any other Person:
           ---------                                                      

          (i)    which directly or indirectly through one or more intermediaries
     controls, or is controlled by, or is under common control with, such Person
     (excluding any trustee under, or any committee with responsibility for
     administering any Plan);

          (ii)   which beneficially owns or holds ten percent (10%) or more of
     any class of the Voting Stock of such Person (or, in the case of a Person
     which is not a corporation, ten percent (10%) or more of the equity
     interests); or

          (iii)  ten percent (10%) or more of the Voting Stock (or, in the case
     of a Person which is not a corporation, ten percent (10%) or more of the
     equity interests) of which, is beneficially owned or held, directly or
     indirectly, by such Person.


The term "control" means the possession, directly or indirectly, of the power to
direct or cause the direction of the management and policies of a Person,
whether through the ownership of Voting Stock, by contract or otherwise.

          "Agreement" has the meaning specified in the preamble.
           ---------                                   -------- 

          "Alternative Currency" means British Pound Sterling, Canadian Dollars,
           --------------------                                                 
German Deutschmarks, and any other lawful currency other than Dollars which is
freely transferable and convertible into Dollars as agreed to from time to time
by the Issuing Lender and the Administrative Agent (in their respective sole and
absolute discretion).

          "Applicable Base Rate Margin," "Applicable Commitment Fee Percentage,"
           ---------------------------    ------------------------------------  
"Applicable Eurodollar Rate Margin," "Applicable Financial Letter of Credit Fee
 ---------------------------------    -----------------------------------------
Percentage," and "Applicable Performance Letter of Credit Fee Percentage"
- ----------        ------------------------------------------------------ 
respectively mean, during any Pricing Period, the amount set forth below for
such Applicable Base Rate Margin, Applicable Commitment Fee Percentage,
Applicable Eurodollar Rate Margin, Applicable Financial Letter of Credit Fee
Percentage or Applicable Performance Letter of 
<PAGE>
 
Credit Fee Percentage, as the case may be, depending upon the Total Leverage
Ratio as of the last day of the Fiscal Quarter most recently ended prior to the
first day of such Pricing Period:


<TABLE>
<CAPTION>
===========================================================================================================
                                                                           Applicable        Applicable
     Total         Applicable       Applicable          Applicable         Financial         Performance
   Leverage         Base Rate       Commitment        Eurodollar Rate   Letter of Credit  Letter of Credit
     Ratio           Margin       Fee Percentage          Margin         Fee Percentage    Fee Percentage
===========================================================================================================
<S>                <C>               <C>                <C>                 <C>              <C>           
Less than 2.75x      0.00%             0.30%              1.25%               1.25%            0.625%
- ----------------------------------------------------------------------------------------------------------- 
Greater than or      0.0%              0.375%             1.50%               1.50%            0.75%
equal to 2.75x   
but less than
3.50x
- -----------------------------------------------------------------------------------------------------------
Greater than or      0.0%             0.375%              1.75%               1.75%           0.875%
equal to 3.50x   
but less than
4.25x
- -----------------------------------------------------------------------------------------------------------
Greater than or      0.25%             0.50%              2.00%               2.00%           1.00%
equal to 4.25x   
but less than
5.00x
- -----------------------------------------------------------------------------------------------------------
Greater than or      0.50%             0.50%              2.25%               2.25%           1.125%
equal to 5.00x   
but less than
5.75x
- -----------------------------------------------------------------------------------------------------------
Greater than or      0.75%             0.50%              2.50%               2.50%           1.125%
equal to 5.75x   
- -----------------------------------------------------------------------------------------------------------
</TABLE>


provided, however, that (i) if and for so long as the Borrower shall have failed
- --------  -------                                                               
to timely deliver a Compliance Certificate under Section 6.4(b) or Section
                                                 --------------    -------
6.4(c) with respect to such Fiscal Quarter most recently ended, the Applicable
- ------                                                                        
Base Rate Margin, Applicable Commitment Fee Percentage, Applicable Eurodollar
Rate Margin, Applicable Financial Letter of Credit Fee Percentage, and
Applicable Performance Letter of Credit Fee Percentage for such Pricing Period
shall be determined as if the Total Leverage Ratio is greater than or equal to
5.75 to 1.00, (ii) notwithstanding the foregoing, for the period beginning on
the Closing Date and ending on the first day of the first Pricing Period
commencing after the Closing Date, the Applicable Base Rate Margin, Applicable
Commitment Fee Percentage, Applicable Eurodollar Rate Margin, Applicable
Financial Letter of Credit Fee Percentage, and Applicable Performance Letter of
Credit Fee Percentage for such Pricing Period shall be determined as if the
Total Leverage Ratio is greater than or equal to 4.25 to 1.00 but less than 5.00
to 1.00 and (iii) notwithstanding the foregoing, the Applicable Performance
Letter of Credit Fee Percentage shall be subject to change in accordance with
Section 2.10(c).
- --------------- 

                                    -S-   -
                                       ---
<PAGE>
 
          "Applicable Law" means, with respect to any Person or matter, any law,
           --------------                                                       
rule, regulation, order, decree or other requirement having the force of law
relating to such Person or matter and, where applicable, any interpretation
thereof by any Person having jurisdiction with respect thereto or charged with
the administration or interpretation thereof.

          "Applicable Lending Office" means, with respect to each Lender, such
           -------------------------                                          
Lender's Domestic Lending Office in the case of a Base Rate Loan and such
Lender's Eurodollar Office in the case of a Eurodollar Rate Loan.

          "Assignee" has the meaning specified in Section 9.7.
           --------                               ----------- 

          "Assignment and Acceptance" means an assignment and acceptance entered
           -------------------------                                            
into by a Lender and an Eligible Assignee, and accepted by the Administrative
Agent, in substantially the form of Exhibit A.
                                    --------- 

          "Attorney Costs" means and includes all reasonable fees and
           --------------                                            
disbursements of any law firm or other external counsel, the reasonable
allocated cost of internal legal services which are performed (but without
duplication of the services performed by any external counsel) specifically with
respect to this Agreement, any other Loan Document or otherwise related to the
relationship of the Lenders and the Borrower and, without duplication, all
reasonable disbursements of internal counsel.

          "Authorized Officer" means, relative to any Loan Party, the officers
           ------------------                                                 
of such Loan Party whose signatures and incumbency shall have been certified to
the Administrative Agent pursuant to Section 4.1.
                                     ----------- 

          "Availability" means, at any time, an amount (determined on a Dollar
           ------------                                                       
equivalent basis) equal to the Revolving Commitment Amount then in effect minus
                                                                          -----
the then outstanding Letter of Credit Obligations.

          "Bank of America" has the meaning specified in the preamble.
           ---------------                                   -------- 

          "Bankruptcy Code" means the Federal Bankruptcy Reform Act of 1978 (11
           ---------------                                                     
U.S.C. (S) 101, et seq.).
                -------  

          "Base Capital Expenditure Amount" has the meaning specified in Section
           -------------------------------                               -------
6.3(a).
- ------ 

          "Base Rate" means the higher of:
           ---------                      

          (i)  the rate of interest publicly announced from time to time by Bank
     of America (or its successor) in San Francisco, California as its
     "reference rate."  It is a rate set by Bank of America based upon various
     factors including Bank of America's costs and desired return, general
     economic conditions and other factors, and is used as a reference point for
     pricing some loans, which may be priced at, above, or below such announced
     rate.  Any change in the reference rate announced by Bank of America shall
     take effect at 

                                    -S-   -
                                       ---
<PAGE>
 
     the opening of business on the day specified in the public announcement of
     such change; and

          (ii) 0.50% per annum above the latest Federal Funds Rate.

          "Base Rate Loan" means a Loan which bears interest at or determined by
           --------------                                                       
reference to the Base Rate.

          "Benefit Plan" means a defined benefit plan as defined in Section
           ------------                                                    
3(35) of ERISA (other than a Multiemployer Plan) in respect of which the
Borrower or any ERISA Affiliate is, or within the immediately preceding six (6)
years was, an "employer" as defined in Section 3(5) of ERISA.

          "Bonding Agreement" means, collectively, the Reliance Agreement and
           -----------------                                                 
any supplement thereto or replacement thereof, and any similar contractual
arrangement with providers of bid, performance or payment bonds, each of which
supplement, replacement or similar arrangement being subject to the
Intercreditor Agreement.

          "Borrower" has the meaning specified in the preamble.
           --------                                   -------- 

          "Borrowing" means a borrowing of Loans made by all of the Lenders in
           ---------                                                          
accordance with their respective applicable Percentages, on the same Business
Day, in accordance with Section 2.4.
                        ----------- 

          "Business Day" means a day of the year on which banks are not required
           ------------                                                         
or authorized to close in any of New York City or Chicago and, if the applicable
Business Day relates to any Eurodollar Rate Loan, a day of the year on which
dealings are carried on in the interbank Eurodollar market.

          "Capital Adequacy Regulation" means any guideline, request or
           ---------------------------                                 
directive of any central bank or other Governmental Authority, or any other law,
rule or regulation, whether or not having the force of law, in each case,
regarding capital adequacy of any bank or of any corporation controlling a bank.

          "Capitalization Documents" means the Merger Agreement,  the
           ------------------------                                  
Shareholders Agreement and the Registration Rights Agreement.

          "Capital Expenditures" means, for any period, the aggregate amount of
           --------------------                                                
all expenditures of the Borrower and its Subsidiaries for fixed or capital
assets made or incurred during such period (whether or not paid in cash and
including that portion of Capitalized Leases which is capitalized on the
consolidated balance sheet of the Borrower and its Subsidiaries) which, in
accordance with GAAP, would be classified as capital expenditures; provided,
                                                                   -------- 
however, that, for any such period, such aggregate amount shall be reduced by
- -------                                                                      
the sum of (x) proceeds received from the sale of fixed or capital assets which
have been applied, within one year of receipt thereof, to the purchase of
replacement fixed or capital assets used for substantially the same purpose as
the assets sold; and (y) insurance or requisition proceeds or condemnation


                                    -S-   -
                                       ---
<PAGE>
 
awards received in connection with the damage, destruction, requisition or
condemnation of fixed or capital assets which have been applied, within one year
of receipt thereof, to the purchase of replacement fixed or capital assets used
for substantially the same purpose as the assets or properties damaged,
destroyed, requisitioned or condemned.

          "Capitalized Lease" means, with respect to any Person, any lease of
           -----------------                                                 
any property by that Person as lessee, the obligation for Rentals with respect
to which is required to be accounted for as a capital lease on the balance sheet
of such person in accordance with GAAP.

          "Capitalized Rentals" means, as of the date of any determination, the
           -------------------                                                 
amount at which the aggregate Rentals due and to become due under all
Capitalized Leases under which the Borrower or any of its Subsidiaries is a
lessee would be reflected as a liability on a consolidated balance sheet of the
Borrower and its Subsidiaries.

          "CERCLA" has the meaning specified in the definition of "Environmental
           ------                                                  -------------
Laws."
- ----  

          "Claims" means any claim or demand, by any Person, of whatsoever kind
           ------                                                              
or nature for any alleged Liabilities and Costs, whether based in contract,
tort, implied or express warranty, strict liability, criminal or civil statute,
Permit, ordinance or regulation, common law or otherwise.

          "Closing Date" means the date on which all of the conditions precedent
           ------------                                                         
set forth in Section 4.1 are satisfied or waived by all of the Lenders.
             -----------                                               

          "Code" means the Uniform Commercial Code of the State of Illinois.
           ----                                                             

          "Collateral" means all Property and interests in Property now owned or
           ----------                                                           
hereafter acquired by the Parent or any of its Subsidiaries in or upon which a
Lien is granted under the Collateral Documents.

          "Collateral Documents" means the First Preferred Fleet Mortgages, the
           --------------------                                                
Second Preferred Fleet Mortgages, the Note Pledge Agreement, the Equipment
Security Agreements, the Receivables Security Agreements, the Proceeds Agent
Agreement, financing statements and all other similar agreements, assignments,
instruments and documents delivered to the Administrative Agent from time to
time to create, evidence or perfect Liens securing the Obligations, and all
amendments, supplements, modifications, renewals, replacements, restatements,
consolidations, substitutions, and extensions of any of the foregoing.

          "Commitment" shall mean collectively, the Revolving Commitments and
           ----------                                                        
the Term Commitments, or with respect to any Lender, such Lender's Revolving
Commitment and Term Commitment.

          "Commitment Fee" shall have the meaning specified in Section 2.14(a).
           --------------                                      --------------- 

          "Compliance Certificate" shall have the meaning specified in Section
           ----------------------                                      -------
6.4(d).
- ------ 


                                    -S-   -
                                       ---
<PAGE>
 
          "Contaminant" means any waste, pollutant, hazardous substance,
           -----------                                                  
radioactive substance or material, toxic substance, hazardous waste, radioactive
waste, special waste, petroleum or petroleum-derived substance or waste,
asbestos in any form or condition, polychlorinated biphenyls ("PCBs"), or any
hazardous or toxic constituent thereof and includes, but is not limited to,
these terms as defined in any Environmental Law.

          "Continuation/Conversion Notice" shall have the meaning specified in
           ------------------------------                                     
Section 2.6.
- ----------- 

          "Continuing Directors" means, as of any date of determination, any
           --------------------                                             
member of the Board of Directors of the Borrower who (i) was a member of such
Board of Directors as of the Closing Date or (ii) was nominated for election or
elected to such Board of Directors with the approval of a majority of the
Continuing Directors who were members of such Board of Directors at the time of
such nomination or election.

          "Contribution Agreement" means the Contribution and Indemnification
           ----------------------                                            
Agreement executed and delivered pursuant to Section 4.1 among each of the
                                             -----------                  
Subsidiary Guarantors.

          "Customary Permitted Investment" means, at any time, Investments of
           ------------------------------                                    
the Borrower or any of its Subsidiaries in (a) any obligation, maturing not more
than one year after such time, issued or guaranteed by the United States
Government or issued by an agency thereof and backed by the full faith and
credit of the United States of America; (b) marketable general obligations,
maturing not more than six months after such time, issued by any state of the
United States of America or any political subdivision of any such state or any
public instrumentality thereof and rated A-2 by Standard & Poor's Rating Group,
a division of McGraw Hill Inc. or P-2 or higher by Moody's Investors Service,
Inc.; (c) commercial paper, maturing not more than nine months from the date of
issue, which is issued by (i) a corporation (other than an Affiliate of any Loan
Party) organized under the laws of any state of the United States or of the
District of Columbia and rated A-2 or higher by Standard & Poor's Rating Group,
a division of McGraw Hill Inc. or P-2 by Moody's Investors Service, Inc., or
(ii) any Lender (or its holding company); (d) any certificate of deposit, time
or demand deposit or bankers acceptance, maturing not more than one year after
such time, which is issued by either (i) a commercial banking institution
organized under the laws of the United States of America or any State thereof or
the District of Columbia that has a combined capital, surplus and undivided
profits of not less than $500,000,000, (ii) any Lender, or (iii) any branch of
any Lender or any commercial banking institution organized under the laws of the
United Kingdom, Canada or Japan having combined capital, surplus and undivided
profits of not less than $500,000,000; (e) fully collateralized repurchase
agreements with a term of not more than 30 days for underlying securities of the
type described in clauses (a) and (b) above, entered into with any institution
                  -----------     ---                                         
meeting the qualifications specified in clause (d) above; (f) participation in
                                        ----------                            
loans made to a borrower (other than an Affiliate of any Loan Party) with a debt
rating of A-2 or higher from Standard & Poor's Rating Group, a division of
McGraw Hill Inc. or P-2 or higher from Moody's Investor Service, Inc.; provided,
                                                                       -------- 
however, that such loans must mature within six months from the date such
- -------                                                                  
participation is purchased; (g) short-term asset management accounts offered by
any Lender for the purpose of investing in notes issued by a corporation (other
than an Affiliate of any Loan Party) organized under the laws of any state of
the United States or of the District of Columbia and rated A-2 or higher by
Standard & Poor's 

                                    -S-   -
                                       ---
<PAGE>
 
Rating Group, a division of McGraw Hill, Inc. or P-2 or higher by Moody's
Investors Service, Inc.; or (h) bonds issued by a municipality or governmental
agency and rated not lower than BBB by Standard & Poor's Rating Group, a
division of McGraw Hill, Inc. or Baa2 by Moody's Investors Service, Inc. and
purchased by the Borrower or any of its Subsidiaries in the ordinary course of
its business in connection with retainage under contracts with its customers.

          "Customary Permitted Liens" means:
           -------------------------        


          (a)  Liens (other than those arising with respect to any noncompliance
     with ERISA or Environmental Laws) for taxes, assessments or governmental
     charges, but only to the extent that such taxes, assessments or charges are
     either not delinquent or are being contested in good faith by appropriate
     proceedings, and with respect to which adequate reserves or other
     appropriate provisions are being maintained in accordance with GAAP;

          (b)  statutory Liens of landlords and Liens of carriers, warehousemen,
     mechanics, materialmen, suppliers and other Liens imposed by law created in
     the ordinary course of business of the Borrower and its Subsidiaries, but
     only to the extent that the amounts secured or to be secured by such Liens
     are either not overdue or are being contested in good faith and with
     respect to which adequate reserves or other appropriate provisions are
     being maintained in accordance with GAAP;

          (c)  Liens (other than any Lien imposed by ERISA or Environmental
     Laws) incurred or deposits (including, without limitation, security
     deposits) made in the ordinary course of the Borrower's business or any of
     its Subsidiaries' businesses (including, without limitation, surety bonds
     and appeal bonds) in connection with workers' compensation, unemployment
     insurance and other types of social security benefits or to secure the
     performance of tenders, bids, contracts (other than for the repayment of
     borrowed money or to stay a judgment pending an appeal thereof), statutory
     obligations and other similar obligations or arising as a result of
     progress payments under government contracts, but only to the extent that
     the amounts secured or to be secured by such Liens are either not
     delinquent or are being contested in good faith and with respect to which
     adequate reserves or other appropriate provisions are being maintained in
     accordance with GAAP;

          (d)  survey exceptions or encumbrances, easements or reservations, or
     rights of others for rights-of-way, utilities and other similar purposes,
     or zoning or other restrictions as to the use of real property, which do
     not materially interfere with the ordinary conduct of the business of the
     Borrower and its Subsidiaries; and

          (e)  Liens of or resulting from any judgment or award, other than any
     judgment or award that gives rise to an Event of Default, the time for
     appeal or petition for rehearing of which shall not have expired, or in
     respect of which the Borrower or any of its Subsidiaries shall at any time
     in good faith be prosecuting an appeal or proceeding for a review and in
     respect of which a stay of execution pending such appeal or proceeding for
     review shall have been secured.


                                    -S-   -
                                       ---
<PAGE>
 
          "CVC" means Citicorp Venture Capital, Ltd., a New York corporation, or
           ---                                                                  
any successor thereto by merger or consolidation.

          "Dawson" means Dawson Dredging Company, a Delaware corporation and
           ------                                                           
wholly-owned Subsidiary of the Borrower.

          "Debt" means and includes, with respect to any Person, (i)
           ----                                                     
indebtedness for borrowed money, (ii) obligations evidenced by bonds (including,
without limitation, license, bid, performance, lien or payment bonds),
debentures, notes or other similar instruments, (iii) obligations which have
been incurred in connection with the acquisition of property or services
(including, without limitation, obligations to pay the deferred purchase price
of property or services), excluding trade payables and accrued expenses incurred
in the ordinary course of business, (iv) obligations secured by any Lien or
other charge upon property or assets owned by such Person, even though such
Person has not assumed or become liable for the payment of such obligations, (v)
obligations created or arising under any conditional sale or other title
retention agreement with respect to property acquired by such Person,
notwithstanding the fact that the rights and remedies of the seller, lender or
lessor under such agreement in the event of default are limited to repossession
or sale of property, (vi) the principal amount of Capitalized Rentals under any
Capitalized Lease, (vii) reimbursement obligations with respect to letters of
credit, and (viii) obligations under direct or indirect guaranties in respect
of, and obligations (contingent or otherwise) to purchase or otherwise acquire,
or otherwise to assure a creditor against loss in respect of, indebtedness or
obligations of others of the kinds referred to in clauses (i) through (vii)
                                                  -----------         -----
above.

          "Default" means an event which, with the lapse of time or the giving
           -------                                                            
of notice, or both, would be an Event of Default.

          "Default Rate" has the meaning specified in Section 2.9.2.
           ------------                               ------------- 

          "Deposit" has the meaning specified in Section 7.2.
           -------                               ----------- 

          "Designated Subsidiary" means (i) a wholly-owned Subsidiary of the
           ---------------------                                            
Borrower which is also a Loan Party, and (ii) any "Wholly Owned Restricted
Subsidiary", as defined in the Note Indenture as in effect on the date hereof.

          "Designated Vessel" means (i) all vessels owned by the Borrower or any
           -----------------                                                    
of its Subsidiaries and documented under the federal laws of the United States
of America and (ii) any vessels, whether or not documented in compliance with
                                                                             
clause (i), with a book value of at least $500,000 owned as of the Closing Date
- ----------                                                                     
or thereafter acquired by the Borrower or any of its Subsidiaries.

          "DOL" means the United States Department of Labor.
           ---                                              

          "Dollars" and the sign "$" each means lawful money of the United
           -------                -                                       
States of America.

                                    -S-   -
                                       ---
<PAGE>
 
          "Domestic Lending Office" means, with respect to any Lender, the
           -----------------------                                        
office of such Lender specified as its "Domestic Lending Office" opposite its
name on Schedule II or in the Assignment and Acceptance pursuant to which it
        -----------                                                         
became a Lender, or such other office of such Lender as such Lender may from
time to time specify to the Borrower and the Administrative Agent.

          "EBITDA" means, with respect to any period, as determined in
           ------                                                     
accordance with GAAP, the sum of the amounts for such period of (i) Net Income,
plus, without duplication and to the extent reflected as a charge in the
- ----                                                                    
consolidated statement of such Net Income for such period: (ii) depreciation,
depletion and amortization expense, (iii) federal, state, local and foreign
income taxes, (iv) Interest Expense, and (v) non-recurring charges arising
during the Fiscal Year ending December 31, 1998 in connection with the
Restructuring Transactions.

          "Eligible Assignee" means any bank, trust company, savings bank,
           -----------------                                              
savings and loan association, investment bank, insurance company, credit
company, finance company or pension fund, unaffiliated with the Borrower or any
Lender Affiliate.

          "Employment Agreements" means those certain employment agreements now
           ---------------------                                               
existing between the Borrower and each of Douglas B. Mackie, Bruce J. Biemeck
and Richard Lowry, respectively, as the same may be amended, supplemented or
otherwise modified from time to time.

          "Environmental Claim" means all claims, however asserted, by any
           -------------------                                            
Governmental Authority or other Person alleging potential liability or
responsibility for violation of any Environmental Law or for release or injury
to the environment or threat to public health, personal injury (including
sickness, disease or death), property damage, natural resources damage, or
otherwise alleging liability or responsibility for damages (punitive or
otherwise), cleanup, removal, remedial or response costs, restitution, civil or
criminal penalties, injunctive relief, or other type of relief, resulting from
or based upon (a) the presence, placement, or Release (including intentional and
unintentional, negligent and non-negligent, sudden or non-sudden, accidental or
non-accidental or Releases) of any Hazardous Material at, in, or from Property,
whether or not owned by the Borrower, or (b) any other circumstances forming the
basis of any violation, or alleged violation, of any Environmental Law.

          "Environmental Laws" means all federal, state or local laws, statutes,
           ------------------                                                   
common law duties, rules, regulations, ordinances and codes, together with all
administrative or judicial orders, licenses, authorizations and permits of, and
agreements with, any Governmental Authorities, in each case relating to
environmental, health, safety and land use matters now or hereafter in effect;
including, without limitation, the Comprehensive Environmental Response,
Compensation and Liability Act of 1980 ("CERCLA"), the Clean Air Act, the
                                         ------                          
Federal Water Pollution Control Act of 1972, the Solid Waste Disposal Act, as
amended, the Resource Conservation and Recovery Act, the Toxic Substances
Control Act, and the Emergency Planning and Community Right-to-Know Act.

                                    -S-   -
                                       ---
<PAGE>
 
          "Equipment Security Agreements" means the "Lender Equipment Security
           -----------------------------                                      
Agreement" referred to and as defined in the Intercreditor Agreement.

          "ERISA" means the Employee Retirement Income Security Act of 1974.
           -----                                                            

          "ERISA Affiliate" means any (a) corporation which is a member of the
           ---------------                                                    
same controlled group of corporations (within the meaning of Section 414(b) of
the IRC) as the Borrower, (b) partnership or other trade or business (whether or
not incorporated) under common control (within the meaning of Section 414(c) of
the IRC) with the Borrower, and (c) member of the same affiliated service group
(within the meaning of Section 414(m) of the IRC) as the Borrower, any
corporation described in clause (a) above or any partnership or trade or
                         ----------                                     
business described in clause (b) above.
                      ----------       

          "Eurodollar Office" means, with respect to any Lender, the office of
           -----------------                                                  
such Lender specified as its "Eurodollar Office" opposite its name on Schedule
                                                                      --------
II hereto or in the Assignment and Acceptance pursuant to which it became a
- --                                                                         
Lender (or, if no such office is specified, its Domestic Lending Office), or
such other office of such Lender as such Lender may from time to time specify to
the Borrower and the Administrative Agent.

          "Eurodollar Rate (Adjusted)" means, relative to any portion of a Loan
           --------------------------                                          
to be made, continued, or maintained as, or converted into, a Eurodollar Rate
Loan for any Interest Period, a rate per annum (rounded upwards, if necessary,
to the nearest 1/100 of 1%) determined pursuant to the following formula:


          Eurodollar Rate  =        IBO Rate
                              --------------------
            (Adjusted)        1 -   the Eurodollar
                                    Reserve Percentage.


          "Eurodollar Rate Loan" means a Loan bearing interest, at all times
           --------------------                                             
during the Interest Period applicable to such Loan, at a rate of interest
determined by reference to the Eurodollar Rate (Adjusted).

          "Eurodollar Reserve Percentage" means, relative to each Interest
           -----------------------------                                  
Period, a percentage (expressed as a decimal) equal to the daily average during
such Interest Period of the percentages in effect on each day of such Interest
Period, as prescribed by the Federal Reserve Board, for determining the maximum
reserve requirements applicable to "Eurocurrency liabilities" pursuant to
Regulation D or any other applicable regulation of the Federal Reserve Board
which prescribes reserve requirements applicable to "Eurocurrency liabilities"
as currently defined in Regulation D.

          "Events of Default" has the meaning specified in Section 7.1.
           -----------------                               ----------- 

          "Excess Cash Flow" means, with respect to any Fiscal Year for the
           ----------------                                                
Borrower and its consolidated Subsidiaries, as determined in accordance with
GAAP, an amount equal to:


          (a)  the sum for such period of (i) EBITDA, plus (ii) extraordinary
                                                      ----                   
     and non-

                                    -S-   -
                                       ---
<PAGE>
 
     recurring cash gains, plus (iii) all non-cash losses deducted in
                           ----                                      
     determining Net Income for such Fiscal Year, plus (iv) cash dividends from
                                                  ----                         
     and cash payments on account of, principal and interest received from Amboy
     Aggregates and other equity joint ventures;


          minus
          -----


          (b) the sum for such period of (i) Capital Expenditures made during
     such period to the extent permitted under Section 6.3(a), plus (ii) all
                                               --------------  ----         
     regularly scheduled installments of principal with respect to Debt, all
     voluntary prepayments of the Term Loans and all mandatory prepayments with
     respect to the outstanding principal balance of the Obligations (other than
     pursuant to Section 2.2.1 and, in any event, excluding all voluntary
                 -------------                                           
     prepayments of Revolving Loans, and excluding all mandatory prepayments of
     Revolving Loans to the extent not concurrently resulting in a permanent
     reduction in the Revolving Commitment Amount), in each case, which were
     actually paid by the Borrower and its consolidated Subsidiaries during such
     Fiscal Year, plus (iii) all federal, state, local and foreign income taxes
                  ----                                                         
     paid or payable in cash during such Fiscal Year by the Borrower and its
     consolidated Subsidiaries, plus (iv) Interest Expense paid or payable in
                                ----                                         
     cash during such Fiscal Year, plus (v) the amount of the net increase (if
                                   ----                                       
     any, but not less than zero) in the consolidated net current assets
     (consolidated current assets minus consolidated current liabilities) of the
     Borrower and its consolidated Subsidiaries since the end of the preceding
     Fiscal Year, plus (vi) extraordinary and non-recurring cash losses, plus
                  ----                                                   ----
     (vii) all non-cash gains or benefits included in determining Net Income for
     such Fiscal Year, plus (viii) all amounts paid in cash to minority
                       ----                                            
     stockholders in Subsidiaries during such period, to the extent such
     payments are not prohibited by any terms of this Agreement, plus (ix) all
                                                                 ----         
     losses attributable to minority interests in Subsidiaries of the Borrower
     added in determining Net Income for such Fiscal Year, and plus (x) all
                                                               ----        
     income attributable to Amboy Aggregates and other equity joint ventures, to
     the extent included in determining Net Income.

          "Existing Agreement" has the meaning specified in Section 3.11.
           ------------------                               ------------ 

          "Existing L/C's" has the meaning specified in Section 3.11.
           --------------                               ------------ 

          "Existing Lenders" has the meaning specified in Section 3.11.
           ----------------                               ------------ 

          "Federal Funds Rate" means, for any period, the rate set forth in the
           ------------------                                                  
weekly statistical release designated as H.15(519), or any successor
publication, published by the Federal Reserve Board (including any such
successor, "H.15(519)") for such day opposite the caption "Federal Funds
(Effective)."  If on any relevant day such rate is not yet published in
H.15(519), the rate for such day will be the rate set forth in the daily
statistical release designated as the Composite 3:30 p.m. Quotations for U.S.
Government Securities, or any successor publication, published by the Federal
Reserve Bank of New York (including any such successor, the "Composite 3:30 p.m.
Quotation") for such day under the caption "Federal Funds Effective Rate."  If
on any relevant day the appropriate rate for such previous day is not yet
published in either H.15(519) or the Composite 3:30 p.m. Quotation, the rate for
such day will be the 

                                    -S-   -
                                       ---
<PAGE>
 
arithmetic mean of the rates for the last transaction in overnight Federal funds
arranged prior to 9:00 a.m. (New York time) on that day by each of three leading
brokers of Federal funds transactions in New York City selected by the
Administrative Agent.

          "Federal Reserve Board" means the Board of Governors of the Federal
           ---------------------                                             
Reserve System, or any successor thereto.

          "Fee Letter" has the meaning specified in Section 2.14(b).
           ----------                                       ------- 

          "Financial Letter of Credit means any standby letter of credit issued
           --------------------------                                          
pursuant to this Agreement, other than a Performance Letter of Credit.
                            ----------                                

          "First Preferred Fleet Mortgages" means the "Lender First Ship
           -------------------------------                              
Mortgage" referred to and as defined in the Intercreditor Agreement.

          "Fiscal Quarter" means any quarter of any Fiscal Year.
           --------------                                       

          "Fiscal Year" means the Fiscal Year of the Loan Parties consisting of
           -----------                                                         
a period of twelve consecutive months ending on December 31.

          "Foreign Currency Contract" has the meaning specified in Section
           -------------------------                               -------
6.1(o).
- ------ 

          "Form 1001" has the meaning specified in Section 2.16(f)(i).
           ---------                               ------------------ 

          "Form 4224" has the meaning specified in Section 2.16(f)(i).
           ---------                               ------------------ 

          "GAAP" means generally accepted accounting principles set forth in the
           ----                                                                 
rules, regulations, statements, opinions and pronouncements of the American
Institute of Certified Public Accountants and of the Financial Accounting
Standards Board (or agencies with similar functions of comparable stature and
authority within the accounting profession), which, subject to Section 1.4, are
                                                               -----------     
applicable to the circumstances as of the date of determination.

          "GLI" means Great Lakes International, Inc., a Delaware corporation.
           ---                                                                

          "Governmental Authority" means any nation or government, any state or
           ----------------------                                              
other political subdivision thereof and any entity exercising executive,
legislative, judicial, regulatory or administrative functions of or pertaining
to government.

          "Great Lakes" means Great Lakes Dredge & Dock Company, a New Jersey
           -----------                                                       
corporation and wholly-owned Subsidiary of the Borrower.

          "Guaranties" by any Person shall mean all obligations (other than
           ----------                                                      
endorsements in the ordinary course of business of negotiable instruments for
deposit or collection) of such Person guaranteeing or in effect guaranteeing any
Debt, dividend or other obligation, of any other Person (the "Primary Obligor")
                                                              ---------------  
in any manner, including, without limitation, all obligations incurred through
an agreement, contingent or otherwise, by such Person: (i) to purchase such Debt
or obligation or any property or assets constituting security therefor, (ii) to
advance or supply funds 

                                    -S-   -
                                       ---
<PAGE>
 
(x) for the purchase or payment of such Debt or obligation or (y) to maintain
working capital or other balance sheet condition or otherwise to advance or make
available funds for the purchase or payment of such Debt or obligation, or (iii)
to lease property or to purchase Securities or other property or services
primarily for the purpose of assuring the owner of such Debt or obligation of
the ability of the Primary Obligor to make payment of the Debt or obligation, or
(iv) otherwise to assure the owner of the Debt or obligation of the Primary
Obligor against loss in respect thereof. For the purposes of all computations
made under this Agreement, a Guaranty in respect of any Debt for borrowed money
shall be deemed to be Debt equal to the principal amount of such Debt for
borrowed money which has been guaranteed (or the aggregate amount of such Debt
which is guaranteed under such Guaranty, whichever is less), and a Guaranty in
respect of any other obligation or liability or any dividend shall be deemed to
be Debt equal to the maximum aggregate amount of such obligation, liability or
dividend so guaranteed. Guaranties shall not include reimbursement obligations
with respect to letters of credit but shall include guaranties of reimbursement
obligations with respect to such letters of credit. 

          "Hazardous Materials" means all those substances which are regulated
           -------------------
by, or which may form the basis of liability under, any Environmental Law,
including all substances identified under any Environmental Law as a hazardous
waste, hazardous constituent, special waste, hazardous substance, hazardous
material, or toxic substance, friable asbestos, or petroleum, including crude
oil or any fraction thereof, and all substances identified under CERCLA as a
pollutant or a contaminant.

          "IBO Rate" means, relative to the Interest Period for each Eurodollar
           --------
Rate Loan comprising all or any part of the same Borrowing, the rate of interest
determined by the Administrative Agent to be (rounded upwards, if necessary, to
the nearest 1/100 of 1%) the rate per annum at which deposits in Dollars in
immediately available funds are offered to the Administrative Agent's Eurodollar
Office in the interbank Eurodollar market as at or about 11:00 a.m., Chicago
time, two (2) Business Days prior to the beginning of such Interest Period, for
delivery on the first day of such Interest Period, in an amount approximately
equal or comparable to the amount of Bank of America's Eurodollar Rate Loan
comprising part of such Borrowing and for a period equal to such Interest
Period.

          "Impermissible Qualification" means, relative to the opinion or
           ---------------------------
certification of any independent public accountant as to any financial
statements of the Borrower and its Subsidiaries, any qualification or exception
to such opinion or certification: (a) which is of a "going concern" or similar
nature, (b) which relates to the limited scope of examination of matters
relevant to such financial statement, or (c) which relates to the treatment or
classification of any item in such financial statements and which, as a
condition to its removal, would require an adjustment to such item the effect of
which would be to cause any violation of Section 6.3.
                                         -----------

          "Indemnified Liabilities" has the meaning specified in 
           -----------------------
Section 9.10(a).
- ---------------

          "Indemnified Person" has the meaning specified in Section 9.10(a).
           ------------------                               ---------------

                                    -S-   -
                                       ---
<PAGE>
 
          "Initial Capital Contribution" means cash equity capital contributions
           ----------------------------                                         
by shareholders of Borrower in an aggregate amount of not less than $37,700,000
pursuant to the terms and conditions of the Capitalization Documents.

          "Insolvency Proceeding" means (a) any case, action or proceeding
           ---------------------                                          
before any court or other Governmental Authority relating to bankruptcy,
reorganization, insolvency, liquidation, receivership, dissolution, winding-up
or relief of debtors, or (b) any general assignment for the benefit of
creditors, composition, marshalling of assets for creditors or other, similar
arrangement in respect of its creditors generally or any substantial portion of
its creditors; in each case, undertaken under United States Federal, state or
foreign law, including the Bankruptcy Code.

          "Intercreditor Agreement" means the Intercreditor Agreement of even
           -----------------------                                           
date herewith by and among Reliance, the Administrative Agent, the Borrower,
GLI, Great Lakes and the other "Sureties" and "Great Lakes Entities" party
thereto and referred to and defined therein, as amended, restated, supplemented
or otherwise modified from time to time.

          "Interest Expense" means, for any Fiscal Quarter, the aggregate
           ----------------                                              
consolidated interest expense (net of interest income) of the Borrower and its
consolidated Subsidiaries for such Fiscal Quarter, as determined in accordance
with GAAP, including (i) Commitment Fees paid or payable during such Fiscal
Quarter, (ii) all other fees paid or payable with respect to the issuance or
maintenance of any Guaranty or contingent Debt (including Letters of Credit but
excluding fees paid under the Bonding Agreement), which, in accordance with
GAAP, would be included as interest expense, (iii) net costs or benefits under
any Rate Protection Agreement (excluding the costs of any commodity hedging
transaction or foreign currency hedging transaction other than a foreign
currency hedging transaction on account of Section 6.1(o)) and (iv) the portion
                                           --------------                      
of any payments made in respect of Capitalized Rentals of the Borrower and its
consolidated Subsidiaries allocable to interest expense, but excluding any
amortization of costs and expenses incurred in connection with, and relating to,
this Agreement or other financings permitted by this Agreement.

          "Interest Period" means, relative to any Eurodollar Rate Loan, the
           ---------------                                                  
period from the date on which such Eurodollar Rate Loan is made or continued as,
or converted into, a Eurodollar Rate Loan pursuant to Section 2.4 or 2.6 as the
                                                      -----------    ---       
case may be, and, unless the maturity of such Eurodollar Rate Loan is
accelerated, the day which numerically corresponds to such date one, two, three,
six or (if available) nine or twelve months thereafter, as the Borrower may
select in its relevant notice pursuant to Section 2.4 or 2.6, as the case may
                                          -----------    ---                 
be; provided that:
    --------      


          (a)  the Borrower shall not be permitted to select Interest Periods to
     be in effect at any one time which have expiration dates occurring on more
     than ten different dates;

          (b)  if there exists no numerically corresponding day in such month,
     such Interest Period shall end on the last Business Day of such month;

          (c)  if such Interest Period would otherwise end on a day which is not
     a Business 

                                    -S-___-
<PAGE>
 
     Day, such Interest Period shall end on the next following Business Day
     (unless such next following Business Day is a Business Day falling in a new
     calendar month, in which case such Interest Period shall end on the
     Business Day next preceding such numerically corresponding day); and

          (d)  the Borrower shall not be permitted to select, and there shall
     not be applicable, any Interest Period that would end later than the
     Revolving Commitment Termination Date.

          "Investment" means, as applied to any Person, any purchase or other
           ----------                                                        
acquisition by that Person of Securities or Debt, or of a beneficial interest in
Securities or Debt, of any other Person, any loan, advance (other than deposits
with financial institutions available for withdrawal on demand, prepaid
expenses, advances to employees, officers and directors and similar items made
or incurred in the ordinary course of business), capital contribution by that
Person to any other Person, and all other items that are or would be classified
as investments on a balance sheet prepared in accordance with GAAP.  The amount
of any Investment shall be determined in conformity with GAAP.  The amount of
any Investment shall be the original principal or capital amount thereof less
all returns of principal or equity thereon

          "IRC" means the Internal Revenue Code of 1986.
           ---                                          

          "IRS" means the Internal Revenue Service.
           ---                                     

          "Issuing Lender" has the meaning specified in the preamble.
           --------------                                   -------- 

          "Issuing-Lender Related Person" means the Issuing Lender, together
           -----------------------------                                    
with their respective Affiliates, and the officers, directors, employees, agents
and attorneys-in-fact of such Issuing Banks and Affiliates.

          "Lead Arranger" means BankAmerica Robertson Stephens.
           -------------                                       

          "Lender Affiliate" means a Person engaged primarily in the business of
           ----------------                                                     
commercial banking and that is a Subsidiary of a Lender or of a Person of which
a Lender is a Subsidiary.

          "Lender First Proceeds Account" has the meaning specified in the
           -----------------------------                                  
Intercreditor Agreement.

          "Lenders" means the institutions listed on the signature pages hereof
           -------                                                             
and each institution that shall become a party hereto pursuant to Section 9.7.
                                                                  ----------- 

          "Letter of Credit" means (i) any Financial Letter of Credit or
           ----------------                                             
Performance Letter of Credit issued hereunder and (ii) any Existing L/C.  Unless
otherwise specified in this Agreement, any determination of the face amount or
undrawn face amount of any Letter of Credit shall be made on a Dollar equivalent
basis.

                                    -S-___-
<PAGE>
 
          "Letter of Credit Availability" means, at any time of determination,
           -----------------------------                                      
an amount (determined on a Dollar equivalent basis) equal to the lesser of (a)
the Revolving Commitment Amount then in effect minus the then outstanding
                                               -----                     
principal balance of the Loans and (b) $55,000,000.

          "Letter of Credit Fee" has the meaning specified in Section 3.3.
           --------------------                               ----------- 

          "Letter of Credit Obligations" means at any time, but without
           ----------------------------                                
duplication, an amount (determined on a Dollar equivalent basis) equal to the
sum of (a) the aggregate amount available to be drawn under outstanding Letters
of Credit, plus (b) all amounts drawn, but not yet reimbursed, under Letters of
           ----                                                                
Credit.

          "Letter of Credit Request" has the meaning specified in Section 3.2.
           ------------------------                               ----------- 

          "Liabilities and Costs" means all liabilities, obligations,
           ---------------------                                     
responsibilities, losses, damages, punitive damages, consequential damages,
treble damages, costs and expenses (including, without limitation, Attorney
Costs, expert and consulting fees and costs of investigation and feasibility
studies), fines, penalties and monetary sanctions, interest, direct or indirect,
known or unknown, absolute or contingent, past, present or future.

          "Lien" means any mortgage, deed of trust, pledge,  hypothecation,
           ----                                                            
assignment, deposit arrangement, security interest, encumbrance for the payment
of money, lien (statutory or other), preference, priority or other security
agreement or preferential arrangement of any kind or nature whatsoever,
including, without limitation, any conditional sale or other title retention
agreement, the interest of a lessor under a capital lease, any financial lease
having substantially the same economic effect as any of the foregoing and the
filing of any financing statement (other than a financing statement filed by a
"true" lessor pursuant to Section 9-408 of the Code or other comparable law of
any jurisdiction) naming the owner of the asset to which such Lien relates as
debtor under the Code or other comparable law of any jurisdiction.

          "Loans" means, collectively, Revolving Loans and Term Loans.
           -----                                                      

          "Loan Documents" means this Agreement, the Notes, the Letters of
           --------------                                                 
Credit, the Fee Letter, the Subsidiary Guaranties, the Contribution Agreement,
the Intercreditor Agreement, the Collateral Documents and all other agreements,
instruments and documents heretofore, now or hereafter executed by or on behalf
of any Loan Party and delivered to or for the benefit of the Administrative
Agent or any Lender in connection with this Agreement, and all amendments,
supplements, modifications, renewals, replacements, restatements,
consolidations, substitutions, and extensions of any of the foregoing.

          "Loan Party" means the Borrower, each Subsidiary Guarantor and each
           ----------                                                        
other Affiliate of the Borrower executing a Loan Document other than the
Administrative Agent, the Issuing Lender, the Lenders and Affiliates thereof.

          "Majority Lenders" means, at any time, the Lenders having, in the
           ----------------                                                
aggregate, a Percentage of more than 50% of the total Percentages of all of the
Lenders at such time.

                                    -S-___-
<PAGE>
 
          "Material Adverse Effect" means (a) a material adverse effect upon (i)
           -----------------------                                              
the Administrative Agent's Lien on or rights with respect to any material
portion of the Collateral (whether as to type, or as to amount or value in
relation to the total amount of Collateral of such type), (ii) the business,
financial condition, operations, properties or prospects of the Borrower and its
Subsidiaries, taken as a whole, or (iii) the ability of  any Loan Party to
perform in any material respect the Loan Documents, the Reliance Agreement, the
Merger Agreement or the Note Indenture to which it is a party or (b) the
occurrence of an event which the Administrative Agent or the Majority Lenders
determine could reasonably be expected to have a material adverse affect on the
legality, validity or enforceability against the Loan Parties of this Agreement,
any other Loan Document, the Reliance Agreement, the Merger Agreement or the
Note Indenture or provided, however, if it shall be determined by any party
                  --------  -------                                        
hereto that any event or occurrence shall reasonably be expected to have a
Material Adverse Effect solely with respect to clause (i) of this definition,
                                               ----------                    
then, notwithstanding such determination, such event or occurrence shall not
reasonably be expected to have such a Material Adverse Effect if, within sixty
(60) days of such determination, the Borrower shall have provided, or caused to
be provided, to the Administrative Agent substitute Collateral with respect to
the affected Collateral and related documentation pursuant to the terms and
conditions of Section 8.10(b) (and, in any event, such event or occurrence shall
              ---------------                                                   
not reasonably be expected to have such a Material Adverse Effect until the
expiration of such sixty (60) day period).

          "Merger Agreement" means that Amended and Restated Agreement and Plan
           ----------------                                                    
of Merger, dated as of August 19, 1998, among Vectura Holding Company LLC, Great
Lakes Dredge & Dock Acquisition, Inc., a Delaware corporation formerly known as
GLDBD Acquisition, Inc., the Borrower, GLI, Blackstone Dredging Partners L.P.
and Blackstone Family Investment Partnership L.P.

          "Merger" means the merger of Great Lakes Dredge & Dock Acquisition,
           ------                                                            
Inc., a Delaware corporation formerly known as GLDBD Acquisition, Inc., with and
into the Borrower, effected pursuant to the terms and conditions of the Merger
Agreement.

          "Multiemployer Plan" means a "multiemployer plan" as defined in
           ------------------                                            
Section 4001(a)(3) of ERISA which is, or within the immediately preceding six
(6) years was, contributed to by the Borrower or any ERISA Affiliate.

          "NATCO" means NATCO Dredging Limited Partnership, a Delaware limited
           -----                                                              
partnership with respect to which Great Lakes owns a 75% interest as of the
Closing Date.

          "Net Cash Proceeds" means the gross cash proceeds received by the
           -----------------                                               
Borrower and its Subsidiaries in connection with the consummation of any of the
transactions of the type resulting in a mandatory prepayment under clauses (d),
                                                                   ----------- 
(e) or (f) of Section 2.8.1, in any such case, net of all fees, expenses,
- ---    ---    -------------                                              
charges, taxes, commissions and costs incurred by the Borrower or any of its
Subsidiaries in connection with the consummation of such transactions.

          "Net Income" means, for any period, the aggregate of all amounts
           ----------                                                     
(exclusive of all amounts in respect of any extraordinary or non-recurring gain
or loss (including, without 

                                    -S-___-
<PAGE>
 
limitation, any write-off of the Chicago flood litigation insurance receivable))
which, in accordance with GAAP, would be included as net income on a
consolidated statement of income of the Borrower and its Subsidiaries for such
period.

          "Net Worth" means, at any time, the sum of all amounts which, in
           ---------                                                      
accordance with GAAP, should be included under shareholders' equity on the
consolidated balance sheet of the Borrower and its Subsidiaries at such time.

          "Note Indenture" means that certain Indenture dated as of August 19,
           --------------                                                     
1998 between The Bank of New York, as trustee, and the Borrower and the
Designated Subsidiaries, pursuant to which the Borrower has consummated the Note
Issuance.

          "Note Indenture Obligations" means all of (a) the Borrower's
           --------------------------                                 
obligations under and with respect to the Note Indenture and Note Issuance,
including, without limitation, all obligations to pay principal, interest,
premium, fees, charges, expenses and indemnities with respect thereto, and to
effect redemptions, repurchases and prepayments with respect thereto, in any
case, whether fixed, contingent, matured or unmatured and (b) the Borrower's
Subsidiaries' guaranty obligations with respect to the obligations of the
Borrower described in clause (a).
                      ---------- 

          "Note Issuance" means the issuance by the Borrower of $115,000,000 in
           -------------                                                       
original aggregate principal amount  of its 11.25% Senior Subordinated Notes due
2008 pursuant to the Note Indenture.

          "Note Pledge Agreement" means the "Lender Pledge Agreement" referred
           ---------------------                                              
to and as defined in the Intercreditor Agreement.

          "Notes" means the promissory notes made by the Borrower and delivered
           -----                                                               
to each Lender evidencing such Lender's Loans and participations in Letters of
Credit.

          "Notice of Borrowing" has the meaning specified in Section 2.4.
           -------------------                               ----------- 

          "Obligations" means all loans, advances, debts, liabilities,
           -----------                                                
obligations, covenants and duties of any kind or nature, present or future,
owing by any Loan Party to any Lender, the Administrative Agent, or any
Affiliate of any Lender or the Administrative Agent, or Person entitled to
indemnification pursuant to this Agreement, whether or not evidenced by any
note, guaranty or other instrument, arising under this Agreement or under any
other Loan Document or any Rate Protection Agreement between any Loan Party and
a Lender or Affiliate of a Lender (but only for so long as such Lender is a
party to this Agreement), whether or not for the payment of money, whether
arising by reason of an extension of credit, loan, guaranty, indemnification,
foreign exchange or interest rate swap transactions or in any other manner,
whether direct or indirect (including those acquired by assignment), absolute or
contingent, due or to become due, now existing or hereafter arising and however
acquired.  The term includes, without limitation, all interest, charges,
expenses, fees, Attorney Costs and any other sum chargeable to any Loan Party
under this Agreement or any other Loan Document.  Unless otherwise specified in
this Agreement, any determination of the amount of outstanding Obligations shall
be made on a Dollar equivalent basis.

                                    -S-___-
<PAGE>
 
          "originating Lender" has the meaning specified in Section 9.7(e).
           ------------------                               -------------- 

          "Other Taxes" has the meaning specified in Section 2.16(b).
           -----------                               --------------- 

          "Participant" has the meaning specified in Section 9.7(d).
           -----------                               -------------- 

          "PBGC" means the Pension Benefit Guaranty Corporation.
           ----                                                 

          "Percentage" means, relative to any Lender, its percentage of the
           ----------                                                      
Commitments as set forth opposite such Lender's name on Schedule II, or if such
                                                        -----------            
Lender has entered into an Assignment and Acceptance, the percentage set forth
for such Lender in the Register maintained by the Administrative Agent pursuant
to Section 9.7(d).
   -------------- 

          "Performance Letter of Credit" means any standby letter of credit
           ----------------------------                                    
issued pursuant to this Agreement to assure completion of performance of a
nonfinancial or commercial obligation of Borrower or any of its Subsidiaries,
until such time, if any, as such letter of credit is recharacterized as relating
to a financial obligation of the Borrower or such Subsidiaries.

          "Permit" means any permit, approval, authorization, license, variance,
           ------                                                               
or permission required from any Governmental Authority under any Applicable Law.

          "Permitted Business Acquisition" means any acquisition by the Borrower
           ------------------------------                                       
or any of its Subsidiaries of all or any part of the assets, shares or other
equity interests in a corporation or other Person engaged in the same business
or substantially related business as the Borrower or any of its Subsidiaries but
only if (i) no Default or Event of Default shall have occurred or be continuing
immediately prior to such acquisition or after giving effect thereto and (ii)
the aggregate consideration paid (including any assumptions of Debt and the fair
market value of any non-cash consideration) to make each such acquisition is
included as a Capital Expenditure in the Fiscal Year in which such acquisition
is consummated for purposes of computing the limits prescribed by Section
                                                                  -------
6.3(a).
- ------

          "Permitted Disposition" means any sale, transfer, lease, contribution,
           ---------------------                                                
conveyance or other disposition of any assets of the Borrower or any of its
Subsidiaries, whether in a single transaction or a series of related
transactions, to any Person, but only if


          (a)  such sale, lease or transfer consists of property which is not
     Collateral and which is either (i) made in the ordinary course of business
     of the Borrower or such Subsidiary, (ii) is a sale, lease or transfer from
     (A) the Borrower to any of its Designated Subsidiaries or from a Designated
     Subsidiary to the Borrower or to another Designated Subsidiary, or (B) the
     Borrower or any Designated Subsidiary to a Subsidiary of the Borrower which
     is not a Designated Subsidiary, or from a Subsidiary of the Borrower which
     is not a Designated Subsidiary to any other such Subsidiary, provided that,
     in the case of this clause (B), the aggregate amount of all such Permitted
     Dispositions (other than renewals and extensions of the leases and
     subleases set forth on Schedule V) made after the Closing Date does not
     exceed $15,000,000, or (iii) is a sale, lease or transfer to another Person
     of assets determined by the Board of Directors of the Borrower or such

                                    -S-___-
<PAGE>
 
     Subsidiary, in its reasonable judgment, to be no longer useful or necessary
     in the operations or businesses of the Borrower or such Subsidiaries,
     provided that the aggregate consideration for all such assets sold, leased
     --------                                                                  
     or transferred after the Closing Date under clause (iii) of this
                                                 ------------        
     subparagraph (a) does not exceed $15,000,000 (it being understood that
     ----------------                                                      
     committing a vessel and related equipment of the Borrower or any of its
     Subsidiaries to the performance of a contract to which it is a party shall
     not constitute a lease of such vessel and related equipment);

          (b)  such disposition is made in connection with a sale and leaseback
     transaction involving the sale or disposition of capital assets (other than
     Collateral, unless the disposition of such Collateral also complies with
     clause (iv) of subparagraph (c) of this definition) of the Borrower or any
     -----------    ----------------                                           
     of its Subsidiaries to a Person other than the Borrower or any of its
     Subsidiaries and (i) such sale or disposition of such capital assets is for
     an amount not less than the fair market value thereof (as determined by the
     Board of Directors of the Borrower or such Subsidiary in its reasonable
     judgment), (ii) no Default or Event of Default shall have occurred or be
     continuing either immediately prior to such disposition or after giving
     effect thereto, (iii) the rental payments of the lease relative to such
     transaction shall not be greater than the fair market rental value (as
     determined by the Board of Directors of the Borrower or such Subsidiary in
     its reasonable judgment) for the assets subject to such lease, and (iv)
     100% of the consideration for such sale or disposition shall be cash; and

          (c)  such disposition is made in connection with the sale of any
     assets of the Borrower or its Subsidiaries other than those of the type
     described in clauses (a) and (b) above and (i) such sale or disposition of
                  -----------     ---                                          
     such assets is for an amount not less than the fair market value thereof,
     as determined by the Board of Directors of the Borrower or such Subsidiary
     in its reasonable judgment, (ii) such sale or disposition and its terms
     have been approved by the Board of Directors of the Borrower or such
     Subsidiary, (iii) no Event of Default shall have occurred and be continuing
     either immediately prior to such disposition or after giving effect thereto
     and (iv) (A) prior to or simultaneously with such disposition, the Borrower
     shall have provided, or caused one or more of its Subsidiaries to provide,
     Collateral (or substitute Collateral) of equal or greater value to that of
     the property subject to such disposition, such Collateral (or substitute
     Collateral) is otherwise reasonably acceptable to the Administrative Agent,
     and such Collateral (or substitute Collateral) and the Administrative
     Agent's substitute Lien thereon are subject to documentation reasonably
     satisfactory to the Administrative Agent (provided that such documentation
     shall be satisfactory if substantially similar to the applicable Collateral
     Documents executed on the Closing Date), including, without limitation, any
     consents required under the Bonding Agreement or Intercreditor Agreement,
     or (B) at least seventy-five percent (75%) of the consideration therefor
     shall be in cash and the Net Cash Proceeds therefrom shall be payable to
     the Borrower or its Subsidiaries at the time of the consummation of such
     disposition, the Borrower shall have concurrently with the consummation of
     such disposition prepaid the Loans in an amount equal to such cash (except
     that the Borrower shall not be required to make any such prepayment to the
     extent that such Net Cash Proceeds do not exceed $100,000 in any Fiscal
     Year), and the aggregate of all non-cash 

                                    -S-___-
<PAGE>
 
     proceeds received by the Borrower and its Subsidiaries after the Closing
     Date in consideration for all dispositions pursuant to this clause (c) does
                                                                 ----------
     not exceed $5,000,000.

          "Person" means and includes any person, employee, individual, sole
           ------                                                           
proprietorship, partnership, joint venture, trust, unincorporated organization,
association, limited liability company, corporation, institution, entity, party,
Governmental Authority or a government or any political subdivision or agency
thereof.

          "Plan" means an employee benefit plan defined in Section 3(3) of ERISA
           ----                                                                 
in respect of which the Borrower or any ERISA Affiliate is, or within the
immediately preceding six (6) years was, an "employer" as defined in Section
3(5) of ERISA.

          "Pricing Period" means the period commencing on the forty-fifth (45th)
           --------------                                                       
day after the end of a Fiscal Quarter (or in the case of the last Fiscal Quarter
of the Fiscal Year, commencing on the ninetieth (90th) day after the end of such
Fiscal Quarter) and ending on the forty-fourth (44th) day after the end of the
succeeding Fiscal Quarter (unless such succeeding Fiscal Quarter is the last
Fiscal Quarter of the Fiscal Year, in which case such period shall end on the
eighty-ninth (89th) date after the end of such Fiscal Quarter).

          "Primary Obligor" has the meaning specified in the definition of
           ---------------                                                
"Guaranties."
- -----------  

          "Principals" has the meaning ascribed thereto in the Indenture, as in
           ----------                                                          
effect on the date hereof.

          "Proceeds Agent" has the meaning specified in the Intercreditor
           --------------                                                
Agreement.

          "Proceeds Agent Agreement" has the meaning specified in the
           ------------------------                                  
Intercreditor Agreement.

          "Property" means any real or personal property, plant, building,
           --------                                                       
facility, structure, vessel, underground storage tank, equipment or unit, or
other asset owned, leased or operated by the Borrower or any of its
Subsidiaries.

          "Rate Protection Agreement" means any interest rate hedging
           -------------------------                                 
transaction, commodity hedging transaction, foreign currency hedging transaction
or similar arrangement entered into pursuant to an agreement in form and
substance (including amounts subject to such agreement) reasonably satisfactory
to the Administrative Agent.

          "Receivables Security Agreements" means the "Lender Receivables
           -------------------------------                               
Security Agreement" referred to and as defined in the Intercreditor Agreement.

          "Refinancing" means the repayment in full of the Borrower's
           -----------                                               
obligations under and with respect to the Existing Agreement, and the
termination of all credit facilities with respect thereto and related liens and
other security granted in connection therewith (except for the continuation of
UCC financing statements for the benefit of the Administrative Agent and the
Lenders and except as otherwise provided in Section 3.11).
                                            ------------  

                                    -S-___-
<PAGE>
 
          "Register" has the meaning specified in Section 9.7(d).
           --------                               -------------- 

          "Registration Rights Agreement" means that certain Registration Rights
           -----------------------------                                        
Agreement dated as of August 19, 1998 among the Borrower, certain of its
Subsidiaries parties thereto, and Donaldson, Lufkin & Jenrette Securities
Corporation.

          "Reimbursement Obligation" has the meaning specified in Section 3.5.
           ------------------------                               ----------- 

          "Release" means any release, spill, emission, leaking, pumping,
           -------                                                       
injection, deposit, disposal, discharge, dispersal, leaching or migration into
the indoor or outdoor environment.

          "Reliance" means Reliance Insurance Company, a Pennsylvania
           --------                                                  
corporation.

          "Reliance Agreement" means, collectively, the "Bonding Agreement" and
           ------------------                                                  
"Underwriting Documents" referred to and as respectively defined in the
Intercreditor Agreement.

          "Rentals" means and includes as of the date of any determination
           -------                                                        
thereof all fixed rents (including as such all payments which the lessee is
obligated to make to the lessor on termination of the lease or surrender of the
property and including all payments on Capital Leases) payable by the Borrower
or a Subsidiary, as lessee or sublessee under a lease of real or personal
property, but shall be exclusive of any amounts required to be paid by the
Borrower or a Subsidiary (whether or not designated as rents or additional
rents) on account of maintenance, repairs, insurance, taxes and similar charges.
Fixed rents under any so-called "percentage leases" shall be computed not only
on the basis of the minimum rents, if any, required to be paid by the lessee but
also on the basis of any additional rents whether based on sales volume or gross
revenues or otherwise.  With respect to leases providing for period of free rent
or discounted rent, Rentals means the amount of the actual cash payments
required under the lease, even though accounting convention may require that the
rents be accrued on an amortized basis over the term of the lease.

          "Reportable Event" means any of the events described in Section 4043
           ----------------                                                   
of ERISA other than an event with respect to which the notice requirements have
been waived by regulation.

          "Restricted Payments" means (i) any dividend or other distribution on
           -------------------                                                 
account of any shares of any class of capital stock of the Borrower (including,
without limitation, any class of preferred stock) now or hereafter outstanding
(except a dividend payable solely in shares or any warrants, options or other
rights with respect thereto or rights to acquire shares, of common stock of the
Borrower), including, without limitation, all payments which are from time to
time due and owing by the Borrower pursuant to or with respect to the Merger
Agreement (other than for indemnification or expense reimbursement pursuant to
the terms thereof) (ii) any redemption, retirement, repurchase, sinking fund or
similar payment, purchase or other acquisition for value of any shares of any
class of capital stock of the Borrower now or hereafter outstanding or any
warrants, options or other rights with respect thereto, (iii) any voluntary or
mandatory redemption, repurchase, retirement, sinking fund payment or other
payment of principal with respect to the Note Indenture Obligations, or any
voluntary payment or other prepayment of interest with respect to the Note
Indenture Obligations, (iv) any payment made to redeem, 

                                    -S-___-
<PAGE>
 
purchase, repurchase or retire, or to obtain the surrender of any outstanding
warrants, options or other rights to acquire shares of any class of capital
stock of the Borrower or any of its Subsidiaries, or (v) the setting aside of
funds for any of the foregoing.

          "Restructuring Documents" means the Loan Documents and all agreements,
           -----------------------                                              
instruments and documents executed and delivered by the Borrower which govern or
effect the consummation of the Merger, the Note Issuance, the Initial Capital
Contribution, the restatement and amendment of the Reliance Agreement as of the
date hereof and related security documentation, or the Refinancing and related
transactions contemplated therein, including, without limitation, the Merger
Agreement, the Note Indenture, the Capitalization Documents and the Reliance
Agreement.

          "Restructuring Transactions" means, collectively, the Merger, the Note
           --------------------------                                           
Issuance, the Initial Capital Contribution, the Refinancing, the restatement and
amendment of the Reliance Agreement as of the date hereof and related security
documentation, the execution and delivery of the Loan Documents, the making of
the initial Loans, the issuance of the initial Letters of Credit if any on the
Closing Date, the granting of Liens to the Agent pursuant to the terms of the
Loan Documents, and the application of all proceeds of any of the foregoing.

          "Revolving Commitment" has the meaning specified in Section 2.1.1.
           --------------------                               ------------- 

          "Revolving Commitment Amount" means $55,000,000, as the same may be
           ---------------------------                                       
reduced after the Closing Date pursuant to Section 2.2.
                                           ----------- 

          "Revolving Commitment Termination Date" means February 18, 2005 or the
           -------------------------------------                                
earlier date of termination in whole of all of the Revolving Commitments
pursuant to Section 2.2 or 7.2.
            -----------    --- 

          "Revolving Loan" has the meaning specified in Section 2.1.1.
           --------------                               ------------- 

          "Second Preferred Fleet Mortgages" means the "Lender Second Ship
           --------------------------------                               
Mortgage" referred to and as defined in the Intercreditor Agreement.

          "Secured Parties" means, collectively, the Administrative Agent, the
           ---------------                                                    
Issuing Lender, the Lenders and each other Person to whom any Obligations are
owing, including, without limitation, each Person entitled to indemnification
pursuant to Section 9.10.
            ------------ 

          "Security" has the meaning specified in Section 2(1) of the 1933 Act.
           --------                                                            

          "Senior Debt" means Total Funded Debt consisting of (i) the
           -----------                                               
outstanding principal balance of the Obligations (other than the aggregate
undrawn face amount of Letters of Credit), (ii) Capitalized Rentals and (iii)
and all other Total Funded Debt owing by the Borrower or any of its Subsidiaries
which is secured in whole or in part by a Lien on any property of the Borrower
or any of its Subsidiaries.

                                    -S-___-
<PAGE>
 
          "Shareholders Agreement" means that certain Securities Purchase and
           ----------------------                                            
Holders Agreement dated as of August 19, 1998 among the Borrower, Vectura
Holding Company LLC, certain purchasing management investors and continuing
management investors signatory thereto, and certain individuals who may execute
such agreement from time to time.

          "Solvent" means when used with respect to any Person that (a) the fair
           -------                                                              
value of all its assets is in excess of the total amount of its debts (including
contingent liabilities); (b) it is able to pay its debts as they mature; (c)it
does not have unreasonably small capital for the business in which it is engaged
or for any business or transaction in which it is about to engage; and (d)it is
not "insolvent" as such term is defined in Section 101(32) of the Bankruptcy
Code.

          "Subsidiary" of any Person means any corporation, partnership, limited
           ----------                                                           
liability company or other association or entity of which more than fifty
percent (50%) of the Voting Stock of such entity is at any time, directly or
indirectly, owned by such Person.

          "Subsidiary Guaranties" means the Guaranties of even date herewith
           ---------------------                                            
executed and delivered pursuant to Section 4.1, pursuant to which the respective
                                   -----------                                  
Subsidiary Guarantors fully, unconditionally and irrevocably guaranty the prompt
and complete payment and performance of the Obligations of the Borrower, as
amended, restated, supplemented or otherwise modified from time to time.

          "Subsidiary Guarantors" means each domestic Subsidiary of the Borrower
           ---------------------                                                
(other than North American Trailing Company and NATCO) and each other Subsidiary
of the Parent which executes and delivers a Subsidiary Guaranty in connection
with this Agreement.

          "Taxes" has the meaning specified in Section 2.16(a).
           -----                               --------------- 

          "Term Commitment" has the meaning specified in Section 2.1.2.
           ---------------                               ------------- 

          "Term Loans" has the meaning specified in Section 2.1.2.
           ----------                               ------------- 

          "Termination Event" means (i) a Reportable Event with respect to any
           -----------------                                                  
Benefit Plan; (ii) the withdrawal of the Borrower or any ERISA Affiliate from a
Benefit Plan during a plan year in which the Borrower or such ERISA Affiliate
was a "substantial employer" as defined in Section 4001(a)(2) of ERISA; (iii)
the imposition of an obligation on the Borrower or any ERISA Affiliate under
Section 4041 of ERISA to provide affected parties written notice of intent to
terminate a Benefit Plan in a distress termination described in Section 4041(c)
of ERISA; (iv) the institution by the PBGC of proceedings to terminate a Benefit
Plan; (v) any event or condition which might constitute grounds under Section
4042 of ERISA for the termination of, or the appointment of a trustee to
administer, any Benefit Plan; or (vi) the partial or complete withdrawal of the
Borrower or any ERISA Affiliate from a Multiemployer Plan.

          "Total Funded Debt" of any Person means as of any date of
           -----------------                                       
determination, all Debt of the Borrower and its consolidated Subsidiaries which,
in accordance with GAAP, should be included as liabilities in the consolidated
balance sheet of the Borrower and its Subsidiaries at such time (excluding,
however, the undrawn face amount of all Letter of Credit and all 

                                    -S-___-
<PAGE>
 
Capitalized Rentals due within one year from the date of determination
hereunder). "Total Funded Debt," when used with respect to the Borrower, shall
mean the aggregate amount of all such Total Funded Debt of the Borrower and its
Subsidiaries determined on a consolidated basis in accordance with GAAP
(eliminating intercompany items).

          "Total Leverage Ratio" has the meaning specified in Section 6.3(b).
           --------------------                               -------------- 

          "Total Leverage Ratio Test Date" has the meaning specified in Section
           ------------------------------                               -------
6.3(b).
- ------ 

          "Transferee" has the meaning specified in Section 9.7(d).
           ----------                               -------------- 

          "type" has the meaning specified in Section 2.3.
           ----                               ----------- 

          "Voting Stock" means Securities or other equity interests of any class
           ------------                                                         
or classes of a corporation, partnership, limited liability company or other
association or entity the holders of which are ordinarily, in the absence of
contingencies, entitled to elect a majority of the board of directors, managers,
general partners, managing members or Persons performing similar functions.



                                   * * * * *

                                    -S-___-
<PAGE>
 
                                  SCHEDULE II
                                  -----------

               LIST OF PERCENTAGES AND APPLICABLE LENDING OFFICES
               --------------------------------------------------


<TABLE> 
<CAPTION> 
Name of Bank                        Domestic Lending Office      Eurodollar Office
- ------------                        -----------------------      ----------------- 
<S>                                 <C>                          <C>  
Bank of America National
Trust and Savings Association       231 South LaSalle Street     231 South LaSalle Street
                                    Chicago, Illinois 60697      Chicago, Illinois 60697 
                                    Attn:  Paul Frey             Attn:  Paul Frey

   Revolving Commitment:                                         $ 17,000,000                        
   Term Commitment:                                              $ 17,000,000                        
   Total Commitment:                                             $ 34,000,000                         
   Percentage:                                                   30.90909091%

Bank of Montreal,                   115 South LaSalle Street     115 South LaSalle Street
Chicago Branch                      Chicago, Illinois 60603      Chicago, Illinois 60603
                                    Attn:  Angelo Barone         Attn:  Angelo Barone

   Revolving Commitment:                                         $ 10,000,000
   Term Commitment:                                              $ 10,000,000
   Total Commitment:                                             $ 20,000,000
   Percentage:                                                   18.18181818%

Summit Bank                         301 Carnegie Center          301 Carnegie Center
                                    Princeton, New Jersey 08543  Princeton, New Jersey 08543
                                    Attn:  Bonnie Gershon        Attn:  Bonnie Gershon

   Revolving Commitment:                                         $  9,250,000
   Term Commitment:                                              $  9,250,000
   Total Commitment:                                             $ 18,500,000 
   Percentage:                                                   16.81818182%

The Northern Trust                  50 South LaSalle Street      50 South LaSalle Street

Company                             Chicago, Illinois 60675      Chicago, Illinois 60675
                                    Attn:  Ronald Mallicoat      Attn:  Ronald Mallicoat

   Revolving Commitment:                                         $  5,000,000
   Term Commitment:                                              $  5,000,000
   Total Commitment:                                             $ 10,000,000
   Percentage:                                                   9.09090909%
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                 <C>                          <C>  
Fleet Bank, N.A.                    1185 Avenue of the Americas  1185 Avenue of the Americas
                                    New York, New York 10036     New York, New York 10036
                                    Attn:  Robert A. Isaksen     Attn:  Robert A. Isaksen

   Revolving Commitment                                          $  7,500,000
   Term Commitment                                               $  7,500,000
   Total Commitment                                              $ 15,000,000
   Percentage:                                                   13.63636364%

LaSalle National Bank               135 South LaSalle Street     135 South LaSalle Street
                                    Chicago, Illinois 60603      Chicago, Illinois 60603
                                    Attn:  James Turner          Attn:  James Turner

   Revolving Commitment:                                         $  6,250,000
   Term Commitment:                                              $  6,250,000
   Total Commitment:                                             $ 12,500,000
   Percentage:                                                   11.36363636%

   Total Commitments:                                            $ 55,000,000
   Total Term Commitment:                                        $ 55,000,000
                                                                 ============
   Total Aggregate Commitment:                                   $110,000,000
</TABLE> 
<PAGE>
 
                                  SCHEDULE III
                                  ------------

                           EXISTING LETTERS OF CREDIT
                           --------------------------



                                                               
                              Expiry            Face 
L/C# Issuer                    Date            Amount             Beneficiary
- -----------                    ----            ------             -----------
                            
<PAGE>
 
                                  SCHEDULE IV
                                  -----------

                           LIST OF CLOSING DOCUMENTS
                           -------------------------



                                   Attached.
<PAGE>
 
                               TABLE OF CONTENTS

                                                                            Page
                                                                            ----

ARTICLE I  DEFINITIONS AND INTERPRETATION......................................1

     SECTION 1.1.  Defined Terms...............................................1
     SECTION 1.2.  Use of Defined Terms........................................1
     SECTION 1.3.  Interpretation..............................................1
     SECTION 1.4.  Accounting Terms............................................2

ARTICLE II  AMOUNT AND TERM OF COMMITMENTS.....................................2

     SECTION 2.1.  Commitments.................................................2
          SECTION 2.1.1.  Revolving Commitment.................................2
          SECTION 2.1.2.  Term Commitment......................................3
     SECTION 2.2.  Reduction of Revolving Commitment Amount....................3
          SECTION 2.2.1.  Optional.............................................3
          SECTION 2.2.2.  Mandatory............................................3
     SECTION 2.3.  Various Types of Loans......................................4
     SECTION 2.4.  Borrowing Procedures........................................4
     SECTION 2.5.  Evidence of Loans...........................................6
     SECTION 2.6.  Continuation/Conversion Procedures..........................6
     SECTION 2.7.  Pro Rata Treatment..........................................7
     SECTION 2.8.  Principal Payments..........................................7
          SECTION 2.8.1.  Repayments and Prepayments...........................7
          SECTION 2.8.2.  Application..........................................9
     SECTION 2.9.  Interest Payments..........................................10
          SECTION 2.9.1.  Rates...............................................10
          SECTION 2.9.2.  Default Rate........................................10
          SECTION 2.9.3.  Payment Dates.......................................10
          SECTION 2.9.4.  Rate Determinations.................................11
     SECTION 2.10.  Increased Costs and Reduction of Returns..................12
     SECTION 2.11.  Funding Losses............................................14
     SECTION 2.12.  Illegality................................................15
     SECTION 2.13.  Right of the Lenders to Fund through Other Offices........15
     SECTION 2.14.  Commitment Fee and Fee Obligations Generally..............16
          (a)  Commitment Fee.................................................16
          (b)  Certain Fees...................................................16
          (c)  Fee Obligations................................................16
     SECTION 2.15.  Payments and Computations.................................16
          (a)  Allocation.....................................................16
     SECTION 2.16.  Taxes.....................................................18
     SECTION 2.17.  Sharing of Payments, Etc..................................21
     SECTION 2.18.  Warranty..................................................21
     SECTION 2.19.  Conditions................................................21
     SECTION 2.20.  All Obligations Secured...................................21
     SECTION 2.21.  Use of Proceeds...........................................22
     SECTION 2.22.  Assignment of Commitments Under Certain Circumstances.....22

                                      -i-
<PAGE>
 
ARTICLE III  LETTERS OF CREDIT................................................23

     SECTION 3.1.  Commitment for Letters of Credit...........................23
     SECTION 3.2.  Issuance of Letters of Credit..............................23
     SECTION 3.3.  Letter of Credit Fee.......................................24
     SECTION 3.4.  Obligations of the Lenders to Issuing Lender under a Letter
                   of Credit..................................................25
     SECTION 3.5.  Reimbursement Obligation...................................25
     SECTION 3.6.  Representatives of Beneficiaries...........................25
     SECTION 3.7.  Responsibility of the Administrative Agent, the Issuing
                   Lender and the Lenders.....................................26
     SECTION 3.8.  Modifications to Letters of Credit.........................27
     SECTION 3.9.  Uniform Customs and Practice for Documentary Credits.......27
     SECTION 3.10.  Indemnification...........................................27
     SECTION 3.11.  Transitional Provisions...................................27
     SECTION 3.12.  Currency Equivalents......................................28

ARTICLE IV  CONDITIONS OF LENDING.............................................28

     SECTION 4.1.  Conditions Precedent to Initial Borrowing and Initial
                   Issuance of Letters of Credit..............................28
          (a)  Delivery of  Documents.........................................28
          (b)  Financial Statements...........................................29
          (c)  Lender Tax Forms...............................................29
          (d)  Other Documents................................................29
          (e)  Satisfactory Legal Form........................................29
          (f)  Evidence and Perfection of Liens...............................29
          (g)  Termination of Existing Agreement..............................29
          (h)  Restructuring Transactions.....................................29
          (i)  Bonding and Intercreditor Agreements...........................30
          (j)  Closing Fees, Expenses, etc....................................30
          (k)  Other Conditions...............................................30
     SECTION 4.2.  Conditions Precedent to Each Borrowing and Each Issuance 
                   of a Letter of Credit......................................30
     SECTION 4.3.  No Waiver..................................................31

ARTICLE V  REPRESENTATIONS AND WARRANTIES.....................................31

     SECTION 5.1.  Representations and Warranties of the Loan Parties.........31
          (a)  Organization; Corporate Powers.................................31
          (b)  Authorizations; Enforceability.................................32
          (c)  No Conflict....................................................32
          (d)  Approvals......................................................32
          (e)  Licenses and Permits...........................................32
          (f)  Financial Reports..............................................33
          (g)  Title to Property; Liens.......................................33
          (h)  No Default.....................................................33
          (i)  Litigation; Contingent Liabilities; Labor Matters..............34
          (j)  Patents, Trademarks and Licenses...............................34
          (k)  ERISA..........................................................34
          (l)  Environmental Matters..........................................35
          (m)  Payment of Taxes...............................................36
          (n)  Fiscal Year....................................................37
          (o)  Governmental Regulation........................................37

                                     -ii-
<PAGE>
 
          (p)  Margin Regulations.............................................37
          (q)  Other Loan Documents...........................................37
          (r)  Corporate Structure; Capitalization............................37
          (s)  Debt; Contingent Obligations; Solvency.........................37
          (t)  Insurance......................................................38
          (u)  Collateral Documents...........................................38
          (v)  The Restructuring Transactions.................................38
          (w)  Year 2000 Compliance...........................................39
          (x)  Accuracy of Information........................................39

ARTICLE VI  COVENANTS.........................................................40

     SECTION 6.1.  Affirmative Covenants......................................40
          (a)  Corporate Existence............................................40
          (b)  Compliance with Laws...........................................40
          (c)  Maintenance of Properties; Insurance...........................40
          (d)  Notice of Litigation...........................................42
          (e)  Taxes; Claims..................................................43
          (f)  ERISA Notices..................................................43
          (g)  ERISA Compliance...............................................44
          (h)  Patents, Trademarks and Licenses...............................45
          (i)  Notice of Labor Disputes.......................................45
          (j)  Notice of Default..............................................45
          (k)  Environmental Notices..........................................45
          (l)  Environmental Laws.............................................46
          (m)  Books, Records and Inspections.................................46
          (n)  Bonding Agreement; Employment Agreements.......................46
          (o)  Foreign Exchange Hedging.......................................47
          (p)  Future Subsidiaries............................................47
          (q)  Further Assurances.............................................48
     SECTION 6.2.  Negative Covenants.........................................48
          (a)  Consolidation, Mergers and Acquisitions........................48
          (b)  Investments....................................................48
          (c)  Restricted Payments............................................50
          (d)  Transactions with Affiliates...................................50
          (e)  Negative Pledges, etc..........................................51
          (f)  Guaranties.....................................................51
          (g)  Sales of Assets................................................51
          (h)  Liens, etc.....................................................52
          (i)  Debt...........................................................53
          (j)  ERISA..........................................................55
          (k)  Conduct of Business............................................55
          (l)  Sales and Leasebacks...........................................56
          (m)  Margin Regulation..............................................56
          (n)  Lease Obligations..............................................56
          (o)  Modification of Material Agreements and Documents..............56
          (p)  Change of Location or Name.....................................56
          (q)  Take or Pay Contracts..........................................57

                                     -iii-
<PAGE>
 
     SECTION 6.3.  Financial Covenants........................................57
          (a)  Capital Expenditures and Permitted Business Acquisitions.......57
          (b)  Maximum Total Leverage.........................................57
          (c)  Maximum Senior Leverage........................................58
          (d)  Interest Coverage Ratio........................................58
          (e)  Net Worth......................................................59
     SECTION 6.4.  Financial Reporting........................................59
          (a)  System of Accounting...........................................59
          (b)  Quarterly Reports..............................................59
          (c)  Annual Reports.................................................60
          (d)  Compliance Certificate.........................................60
          (e)  Budget.........................................................60
          (f)  Securities Reports.............................................61
          (g)  Vessels........................................................61
          (h)  Other Information..............................................61
          (i)  Delivery of Financial Information to the Lenders...............61
          (j)  New Subsidiaries...............................................61

ARTICLE VII  EVENTS OF DEFAULT; REMEDIES......................................61

     SECTION 7.1.  Events of Default..........................................61
          (a)  Failure to Make Payments When Due..............................61
          (b)  Breach of Covenants............................................62
          (c)  Incorrect Representation or Warranty...........................62
          (d)  Default as to Other Debt.......................................62
          (e)  Bankruptcy.....................................................63
          (f)  Judgments and Attachments......................................63
          (g)  ERISA Termination Event........................................63
          (h)  ERISA Waiver...................................................64
          (i)  Termination of Documents; Failure of Security..................64
          (j)  Change in Control..............................................64
          (k)  Bonding Agreement..............................................65
     SECTION 7.2.  Acceleration...............................................65
     SECTION 7.3.  Injunctive Relief..........................................66
     SECTION 7.4.  Allocation Among Secured Parties...........................66

ARTICLE VIII  THE ADMINISTRATIVE AGENT........................................66

     SECTION 8.1.  Appointment and Authorization..............................66
     SECTION 8.2.  Delegation of Duties.......................................67
     SECTION 8.3.  Liability of Administrative Agent..........................67
     SECTION 8.4.  Reliance by Administrative Agent...........................67
     SECTION 8.5.  Notice of Default..........................................68
     SECTION 8.6.  Credit Decision............................................68
     SECTION 8.7.  Indemnification............................................69
     SECTION 8.8.  Administrative Agent in Individual Capacity................70
     SECTION 8.9.  Successor Administrative Agent.............................70
     SECTION 8.10.  Collateral Matters; Release of Collateral.................70
     SECTION 8.11.  Intercreditor Agreement and other Loan Documents..........71


                                     -iv-
<PAGE>
 
ARTICLE IX  MISCELLANEOUS.....................................................71

     SECTION 9.1.  Amendments, etc............................................71
     SECTION 9.2.  Notices, etc...............................................72
     SECTION 9.3.  No Waiver; Remedies........................................73
     SECTION 9.4.  Costs and Expenses.........................................73
     SECTION 9.5.  Setoff.....................................................74
     SECTION 9.6.  Binding Effect.............................................75
     SECTION 9.7.  Assignments, Participations, etc...........................75
     SECTION 9.8.  Survival of Warranties and Agreements......................77
     SECTION 9.9.  Marshalling; Recourse to Security; Payments Set Aside......77
     SECTION 9.10.  Indemnification...........................................78
          (a)  General Indemnity..............................................78
          (b)  Environmental Indemnity........................................78
          (c)  Survival; Defense..............................................79
     SECTION 9.11.  Consent to Jurisdiction and Service of Process; Waiver of
                    Jury Trial................................................79
     SECTION 9.12.  Performance of Obligations................................79
     SECTION 9.13.  Construction..............................................80
     SECTION 9.14.  GOVERNING LAW.............................................80
     SECTION 9.15.  Execution in Counterparts.................................80
     SECTION 9.16.  Entire Agreement..........................................80


                                      -v-

<PAGE>
 
                                                                EXHIBIT 10.02
                                                                -------------

                          SECOND AMENDED AND RESTATED

                          UNDERWRITING AND CONTINUING

                              INDEMNITY AGREEMENT

                                     dated

                                August 19, 1998

                                     among

                     GREAT LAKES DREDGE & DOCK CORPORATION,

                          CERTAIN OF ITS SUBSIDIARIES

                                      and

                          RELIANCE INSURANCE COMPANY,

                       UNITED PACIFIC INSURANCE COMPANY,

                   RELIANCE NATIONAL INSURANCE COMPANY, and

                            RELIANCE SURETY COMPANY
<PAGE>
 
                               TABLE OF CONTENTS

                                                                            Page
                                                                            ----

ARTICLE I    DEFINITIONS....................................................   2

     1.1   DEFINED TERMS....................................................   2
     1.2   USE OF DEFINED TERMS.............................................  12
     1.3   ACCOUNTING PRINCIPLES............................................  13

ARTICLE II   BOND FACILITY..................................................  13

     2.1   BONDS............................................................  13
     2.2   PREMIUM PAYMENT..................................................  13

ARTICLE III  INDEMNIFICATION................................................  13

     3.1   INDEMNITY........................................................  13
     3.2   EXONERATION......................................................  14
     3.3   CASH COLLATERAL..................................................  14
     3.4   WAIVER OF CLAIMS AND HOLD HARMLESS...............................  14
     3.5   WITHDRAWAL FROM AND TERMINATION OF AGREEMENT.....................  15
     3.6   INDEMNITORS AGREE TO BECOME PARTY DEFENDANTS.....................  15
     3.7   INDEMNITORS' WAIVER OF NOTICE....................................  15
     3.8   INDEMNITORS' KNOWING CONSENT TO AGREEMENT........................  15
     3.9   INDEMNITORS' DUTY TO REMAIN INFORMED OF PRINCIPAL'S BUSINESS.....  16
     3.10  ENFORCEABILITY OF RIGHTS DIRECTLY AGAINST INDEMNITORS............  16

ARTICLE IV   CONDITIONS PRECEDENT...........................................  16

     4.1   CONDITION PRECEDENT TO EFFECTIVENESS OF THIS AGREEMENT...........  16
     4.2   CONDITIONS PRECEDENT TO ALL BONDS................................  17

ARTICLE V    REPRESENTATIONS AND WARRANTIES.................................  18

     5.1   INCORPORATION, GOOD STANDING, AND DUE QUALIFICATION..............  18
     5.2   CORPORATE POWER AND AUTHORITY....................................  19
     5.3   LEGALLY ENFORCEABLE AGREEMENT....................................  19
     5.4   APPROVALS........................................................  19
     5.5   OWNERSHIP AND LIENS..............................................  19
     5.6   TAXES............................................................  19
     5.7   INSURANCE........................................................  20
     5.8   COMPLIANCE.......................................................  20
     5.9   LITIGATION.......................................................  20
     5.10  SUBSIDIARIES.....................................................  20
     5.11  REAL PROPERTY....................................................  20
     5.12  EQUIPMENT........................................................  20
     5.13  VESSELS..........................................................  20


                                      -i-
<PAGE>
 
ARTICLE VI   COVENANTS......................................................  21

     6.1   CORPORATE EXISTENCE..............................................  21
     6.2   MAINTENANCE OF RECORDS...........................................  21
     6.3   MAINTENANCE OF PROPERTIES........................................  21
     6.4   MAINTENANCE OF INSURANCE.........................................  21
     6.5   COMPLIANCE WITH LAWS.............................................  21
     6.6   TAXES............................................................  22
     6.7   BOOKS AND RECORDS................................................  22
     6.8   FINANCIAL RECORDS AND REPORTS....................................  22
     6.9   PRINCIPALS' REPRESENTATION.......................................  22
     6.10  NOTICE OF LITIGATION.............................................  23
     6.11  LIENS............................................................  23
     6.12  DEBT AND CONTINGENT LIABILITIES..................................  23
     6.13  DISPOSITION OF ASSETS; ISSUANCE OF EQUITY........................  25
     6.14  MERGERS..........................................................  26
     6.15  INVESTMENTS......................................................  26
     6.16  DIVIDEND RESTRICTIONS............................................  28
     6.17  RESTRICTIONS UPON CONTRACTS WITH AFFILIATES......................  29
     6.18  NATURE OF BUSINESS...............................................  29
     6.19  NET WORTH........................................................  29
     6.20  NET CURRENT ASSETS...............................................  30
     6.21  SUBORDINATED DEBT AND PAYMENT BLOCKAGE NOTICE....................  30

ARTICLE VII  RIGHTS OF RELIANCE.............................................  31

     7.1   FURTHER ASSURANCES/RELIANCE AS ATTORNEY-IN-FACT..................  31
     7.2   CONTRACT FUNDS HELD IN TRUST.....................................  31
     7.3   RIGHT OF RELIANCE TO SETTLE CLAIMS...............................  31
     7.4   AUTHORITY OF RELIANCE TO MAKE LOANS TO PRINCIPAL.................  32
     7.5   AUTHORITY OF RELIANCE TO AMEND BOND..............................  32
     7.6   RIGHTS OF RELIANCE TO TAKE POSSESSION OF THE WORK................  32
     7.7   DEPOSITORY TRUST ACCOUNTS........................................  32
     7.8   PRESERVATION OF RELIANCE'S RIGHTS................................  33
     7.9   AUTHORITY OF RELIANCE TO ELECT REMEDIES..........................  33

ARTICLE VIII MISCELLANEOUS..................................................  33

     8.1   BENEFICIAL PARTIES...............................................  33
     8.2   JOINT AND SEVERAL................................................  33
     8.3   ATTORNEYS FEES...................................................  33
     8.4   APPLICABLE LAW...................................................  33
     8.5   JURISDICTION FOR SUITS UNDER THIS AGREEMENT......................  34
     8.6   INDEMNITORS WAIVE DEFENSE OF SUBSEQUENT EXECUTION................  34
     8.7   VALIDITY OF AGREEMENT............................................  34
     8.8   ORAL MODIFICATIONS INEFFECTIVE...................................  34
     8.9   NOTICES..........................................................  34


                                     -ii-
<PAGE>
 
     8.10  REAFFIRMATION AND RESTATEMENT....................................  35
     8.11  CONFIDENTIALITY..................................................  35
     8.12  RELEASE OF LIENS.................................................  35


                                     -iii-
<PAGE>
 
EXHIBIT A - Form of Supplemental Signature Page
EXHIBIT B - Form of Pledge Agreement
EXHIBIT C - Form of Security Agreement (Accounts Receivable)
EXHIBIT D - Form of Security Agreement (Equipment)
EXHIBIT E - Form of Vessel Mortgage (First)
EXHIBIT F -  Form of Vessel Mortgage (Second)

SCHEDULE 1.1 -   Permitted Liens
SCHEDULE 5.7 -   Insurance
SCHEDULE 5.9  -  Litigation
SCHEDULE 5.10 -  Subsidiaries
SCHEDULE 5.11 -  Real Property
SCHEDULE 5.12 -  Equipment
SCHEDULE 5.13 -  Vessels
SCHEDULE 6.12 -  Existing Debt and Contingent Liabilities
SCHEDULE 6.15 -  Investments



                                     -iv-
<PAGE>
 
                          SECOND AMENDED AND RESTATED
                          ---------------------------

                          UNDERWRITING AND CONTINUING
                          ---------------------------

                              INDEMNITY AGREEMENT
                              -------------------

     THIS SECOND AMENDED AND RESTATED UNDERWRITING AND CONTINUING INDEMNITY
AGREEMENT (the "Agreement"), made and entered into this 19 day of August, 1998,
                ---------                                                      
is among (i) GREAT LAKES DREDGE & DOCK CORPORATION, a Delaware corporation
                                                                          
("HOLDINGS"), and the SUBSIDIARIES of HOLDINGS from time to time signatories
- ----------                                                                  
hereto (collectively with HOLDINGS, the "INDEMNITORS"), and (ii) RELIANCE
                                         -----------                     
INSURANCE COMPANY, a Pennsylvania corporation, UNITED PACIFIC INSURANCE COMPANY,
a Pennsylvania corporation, RELIANCE NATIONAL INSURANCE COMPANY, a Delaware
corporation, and RELIANCE SURETY COMPANY, a Delaware corporation (collectively,
the foregoing parties are referred to herein as "RELIANCE").
                                                 --------   

                                R E C I T A L S

     WHEREAS, the PRINCIPALS are engaged in the business, among other things, of
dredging, dredging reclamation, aggregate mining and supply, and marine
construction in the United States and in other countries, and any PRINCIPAL,
individually, jointly with others or on behalf of any of its SUBSIDIARIES,
AFFILIATES, or divisions or their SUBSIDIARIES, AFFILIATES or divisions now in
existence or hereafter formed or acquired, or on behalf of third-party Persons,
may desire or be required from time to time in connection with these businesses
to deliver certain BOND(s) to OBLIGEES; and

     WHEREAS, certain of the INDEMNITORS, the PRINCIPALS and RELIANCE are
parties to that certain Amended and Restated Underwriting and Continuing
Indemnity Agreement (the "FIRST AMENDMENT AND RESTATEMENT") dated as of
                          -------------------------------              
September 24, 1997, which amended and restated that certain Amended Agreement
dated as of October 15, 1991, among certain of the PRINCIPALS, certain
AFFILIATES of the PRINCIPALS and RELIANCE (as amended and restated by the FIRST
AMENDMENT AND RESTATEMENT, and as otherwise amended or modified, the "ORIGINAL
                                                                      --------
AGREEMENT"); and
- ---------       

     WHEREAS, in accordance with the terms of the ORIGINAL AGREEMENT, RELIANCE
has heretofore executed or procured and, upon the express condition that this
Agreement and the other UNDERWRITING DOCUMENTS be executed, RELIANCE may
continue to execute or procure the execution of BOND(s), and RELIANCE may
continue previously executed BOND(s) and may forbear cancellation of such
BOND(s); and

     WHEREAS, each of the INDEMNITORS recognizes that BONDS are a necessary and
desirable adjunct to the businesses done and to be done by the PRINCIPALS and
desires to accommodate the financial, security, indemnity, exoneration and other
requirements of RELIANCE as an inducement to RELIANCE to become surety upon
obligations of the 
<PAGE>
 
PRINCIPALS and has therefore agreed to be bound by this Agreement and the other
UNDERWRITING DOCUMENTS to which it is a party and has agreed to exercise its
best efforts to permit and require the PRINCIPALS to honor and perform all of
the terms of this Agreement; and

     WHEREAS, RELIANCE has agreed to act as surety or procure surety BONDS for
the PRINCIPALS, subject to the understanding of the parties that RELIANCE is
under no obligation to act as surety for every bond of the PRINCIPALS, that
RELIANCE shall have the right to refuse to execute BONDS upon CONTRACTS which in
its sole judgment present risks not contemplated by this Agreement and that the
PRINCIPALS are under no obligation to obtain BONDS from RELIANCE; and

     WHEREAS, the INDEMNITORS and the PRINCIPALS now desire to amend and restate
the ORIGINAL AGREEMENT on the terms and conditions set forth in this Agreement.

     NOW, THEREFORE, in consideration of the mutual agreements set forth herein,
the execution or procurement of any BOND(s) by RELIANCE or the forbearance or
cancellation of any existing BOND(s) by RELIANCE and as an inducement to such
execution, procurement or forbearance, we, the undersigned PRINCIPALS and
INDEMNITORS, agree and bind ourselves, our successors and assigns, jointly and
severally, as follows:

                                   ARTICLE I

                                  DEFINITIONS
                                        
     SECTION  1.1   DEFINED TERMS.  For the purposes of this Agreement, the
                    -------------                                          
following terms shall have the meanings listed below:

     "AFFILIATE" means, with respect to any PERSON, any other PERSON or group
acting in concert with such PERSON that, directly or indirectly, through one or
more intermediaries, controls, or is controlled by, or is under the common
control with such PERSON.  For purposes of this definition, "control"
(including, with correlative meanings, the terms "controlled by" and "under
common control with"), as used with respect to any PERSON or group of PERSONS,
shall mean the possession, directly or indirectly, of the power to direct or
cause the direction of management and policies of such PERSON, whether through
the ownership of voting securities or by contract or otherwise.

     "AUTHORIZED OFFICER" means, with respect to any PERSON, the chief executive
officer, president, chief financial officer, treasurer, assistant treasurer,
controller or any vice president of such PERSON.

     "BANK LOAN FACILITY" means that certain Credit Agreement dated as of even
date herewith, by and among HOLDINGS, certain corporate affiliates thereof, the
financial institutions from time to time parties thereto, and Bank of America
National Trust and Savings Association, as administrative agent to such
financial institutions, and the documents, 

                                      -2-
<PAGE>
 
instruments and agreements executed and delivered in connection therewith, as
all of the same may be amended, restated, supplemented or otherwise modified
from time to time and any credit agreement or other agreement or agreements
relating to any refinancing, extension, renewal or replacement, in whole or in
part, thereof.

     "BOND(s)" means any surety agreements, undertakings, or instruments of
guarantee signed by RELIANCE on behalf of any PRINCIPAL, whether executed before
or after the execution of this Agreement.

     "CONTINGENT LIABILITY" means any agreement, undertaking or arrangement by
which any Person guarantees, endorses or otherwise becomes or is contingently
liable upon (by agreement, contingent, or otherwise, to provide funds for
payment, to supply funds to, or otherwise to invest in, a debtor, or otherwise
to assure a creditor against loss) the indebtedness, obligation or any other
liability of any other Person (other than by endorsements of instruments in the
course of collection), or guarantees the payment of dividends or other
distributions upon the shares of any other Person.

     "CONTRACT(s)" means any contract referred to or described in any BOND(s)
issued on behalf of any PRINCIPAL.

     "DEBT" means and includes, with respect to any PERSON, (i) indebtedness for
borrowed money, (ii) obligations evidenced by bonds (including, without
limitation, license, bid, performance, lien or payment bonds), debentures, notes
or other similar instruments, (iii) obligations which have been incurred in
connection with the acquisition of property or services (including, without
limitation, obligations to pay the deferred purchase price of property or
services), excluding trade payables and accrued expenses incurred in the
ordinary course of business, (iv) obligations secured by any LIEN or other
charge upon property or assets owned by such PERSON, even though such PERSON has
not assumed or become liable for the payment of such obligations, (v)
obligations created or arising under any conditional sale or other title
retention agreement with respect to property acquired by such PERSON,
notwithstanding the fact that the rights and remedies of the seller, lender or
lessor under such agreement in the event of default are limited to repossession
or sale of property, (vi) the principal amount of any capital lease and (vii)
reimbursement obligations with respect to letters of credit.

     "EQUITY DOCUMENTS" means (i) that certain Securities Purchase and Holders
Agreement dated as of the date hereof among HOLDINGS, Vectura Holding, LLC,
certain purchasing management investors and continuing management investors
signatory thereto, and certain individuals who may execute such agreement from
time to time, (ii) that certain Registration Rights Agreement dated as of the
date hereof among HOLDINGS, certain SUBSIDIARIES signatory thereto and
Donaldson, Lufkin & Jenrette Securities Corporation and (iii) each of the
documents, instruments and agreements executed pursuant to or in connection with
any of the foregoing.

     "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended from time to time, and the regulations and published interpretations
thereof.

                                      -3-
<PAGE>
 
     "EVENT OF DEFAULT" means any one or more of the following:

     (a) Failure by the INDEMNITORS, or any of them, to pay on the date when due
         (and after giving effect to any applicable payment period) any
         obligation owing to RELIANCE hereunder; provided, however, that any
                                                 --------  -------
         BOND premium may be disputed by any PRINCIPAL in good faith in the
         ordinary course of business without causing an EVENT OF DEFAULT under
         this clause (a);

                                       or

     (b) Failure by the INDEMNITORS, or any of them, to comply with or to
         perform their respective obligations under Sections 6.7, 6.14, 6.16,
                                                    ------------  ----  ----  
         6.19, 6.20 or 6.21 of this Agreement, and, in the case of Section 6.16,
         ----  ----    ----                                        ------------
         such failure shall continue for ten (10) days;

                                       or

     (c) Failure by the INDEMNITORS, or any of them, to comply with or perform
         their respective obligations under any provision of this Agreement (and
         not constituting an Event of Default under any of the other clauses of
         this definition) and (1) continuance of such failure for thirty (30)
         days after notice thereof to the INDEMNITOR by RELIANCE specifying such
         failure if such failure can be cured with diligence within such thirty-
         day period by the INDEMNITORS, or can be cured by the payment of money,
         or (2) continuance of such failure for sixty (60) days by RELIANCE
         specifying such failure if such failure cannot with diligence be cured
         within such thirty-day period and cannot be cured by the payment of
         money;

                                       or

     (d) Any representation or warranty made or deemed made by any INDEMNITOR in
         this Agreement or any other UNDERWRITING DOCUMENT, shall prove to have
         been incorrect in any material respect on or as of the date made or
         deemed made;

                                       or

     (e) an OBLIGEE has declared by delivery of written notice to any PRINCIPAL
         that such PRINCIPAL is in default of any provision under the respective
         CONTRACT(s) between such PRINCIPAL and such OBLIGEE and such PRINCIPAL
         has failed to cure such default within that period of time provided to
         cure said default within such CONTRACT(s) in which such PRINCIPAL is
         alleged to be in default 

                                      -4-
<PAGE>
 
         and such default results in the termination of such CONTRACT; provided,
                                                                       -------- 
         that RELIANCE shall, upon investigation, reasonably determine in good
         faith that PRINCIPAL is in default under the CONTRACT(s) or such
         PRINCIPAL has acknowledged its default under the CONTRACT(s),
         irrespective of whether or not such PRINCIPAL is actually in default of
         the CONTRACT(s) (such a determination by RELIANCE shall not be binding
         upon such PRINCIPAL in any dispute such PRINCIPAL may have with such
         OBLIGEE or a claimant under the related BOND(s); except as provided
         above, it shall be no defense to the enforcement of this Agreement by
         RELIANCE, and co-sureties, if any, that PRINCIPAL asserts that it is
         not in default under the CONTRACT(s));

                                       or

     (f) RELIANCE has received notice or knowledge of facts giving rise to a
         reasonable good faith belief that it has incurred or may incur a LOSS
         and a PRINCIPAL has failed to cure such LOSS or to take reasonable
         steps to avoid the incurrence by RELIANCE of such LOSS within thirty
         (30) days after receipt of written notice sent by RELIANCE to such
         PRINCIPAL; provided, that no EVENT OF DEFAULT under this clause (f) 
                    --------                                      ----------
         shall occur if prior to the expiration of such thirty-day period such
         PRINCIPAL causes (1) a letter of credit with a face amount equal to
         such LOSS and otherwise in form and substance reasonably acceptable to
         RELIANCE to be issued and delivered to RELIANCE or (2) cash collateral
         in an amount equal to such LOSS to be pledge to RELIANCE pursuant to
         documentation reasonably acceptable to RELIANCE;

                                       or

     (g) Any PRINCIPAL within fifteen (15) days after receipt of notice sent by
         RELIANCE to such PRINCIPAL has failed, refused or delayed to pay or is
         unable to pay any claims, bills or other indebtedness incurred in, or
         in connection with, the performance of the CONTRACT(s) which claims,
         bills or other indebtedness RELIANCE, upon investigation, shall have
         reasonably determined in good faith to be valid;

                                       or

     (h) Any INDEMNITOR shall (i) fail to pay any DEBT or CONTINGENT OBLIGATION
         of such INDEMNITOR in an aggregate principal amount in excess of
         $5,000,000, or any interest or premium thereon, when due whether by
         scheduled maturity, required

                                      -5-
<PAGE>
 
         prepayment, acceleration, demand, or otherwise (subject to any
         applicable grace periods), or (ii) fail to perform or observe any term,
         covenant, or condition on its part to be performed or observed under
         any agreement or instrument relating to any DEBT or CONTINGENT
         OBLIGATION of such INDEMNITOR in an aggregate principal amount in
         excess of $5,000,000 (subject to any applicable grace periods), if the
         result of such failure to perform or observe is (A) in the case of the
         BANK LOAN FACILITY, either to accelerate the maturity of such DEBT or
         to cause a PAYMENT BLOCKAGE NOTICE to be delivered to the Trustee under
         the 1998 DEBT INDENTURE, (B) in the case of the 1998 DEBT INDENTURE, to
         accelerate or permit the acceleration of the maturity of such DEBT and
         (C) in the case of any other DEBT or CONTINGENT OBLIGATION, to
         accelerate the maturity of such DEBT or CONTINGENT OBLIGATION;

                                       or

     (i) Any INDEMNITOR becomes insolvent or generally fails to pay, or admits
         in writing its inability to pay, debts as they become due; or any
         INDEMNITOR applies for, consents to, or acquiesces in the appointment
         of, a trustee, receiver or other custodian for such INDEMNITOR or for a
         substantial portion of its property, or makes a general assignment for
         the benefit of creditors; or, in the absence of such application,
         consent or acquiescence, a trustee, receiver or other custodian is
         appointed for any INDEMNITOR or for a substantial part of the property
         of any thereof and is not dismissed or discharged within thirty (30)
         days; or any bankruptcy, reorganization, debt arrangement, or other
         case or proceeding under any bankruptcy or insolvency law, or any
         dissolution or liquidation proceeding, is commenced in respect of any
         INDEMNITOR and if such case or proceeding is not commenced by such
         INDEMNITOR, it is consented to or acquiesced in by such INDEMNITOR or
         is not released, dismissed, vacated or fully bonded within thirty (30)
         days undismissed; or any INDEMNITOR takes any corporate action to
         authorize, or in furtherance of, any of the foregoing;

                                       or

     (j) A final judgment or judgments (after the expiration of all times to
         appeal therefrom) for the payment of money in excess of $5,000,000 in
         the aggregate shall be rendered against any INDEMNITOR and the same
         shall not be (i) fully covered by insurance or (ii) vacated, stayed,
         bonded, paid or discharged for a period of thirty (30) days.

                                      -6-
<PAGE>
 
     "FINANCIAL STATEMENTS" means all those balance sheets, income statements
and other financial statements of any INDEMNITOR or any AFFILIATE thereof which
have been furnished to RELIANCE for the purpose of or in connection with this
Agreement and the transactions contemplated hereby.

     "GAAP" is defined as generally accepted accounting principles set forth in
the opinions and pronouncements of the Accounting Principles Board and the
American Institute of Certified Public Accountants and statements and
pronouncements of the Financial Accounting Standards Board.

     "GLDDC" means Great Lakes Dredge & Dock Company, a New Jersey corporation.

     "GLI" means Great Lakes International, Inc., a Delaware corporation.

     "HOLDINGS" has the meaning set forth in the recitals to this Agreement.

     "INDEMNITOR" means any of HOLDINGS or any SUBSIDIARY of HOLDINGS which is a
party to this Agreement as of the date hereof or which becomes a party to this
Agreement after the date hereof by hereafter executing and delivering to
RELIANCE a SUPPLEMENTAL SIGNATURE PAGE and INDEMNITORS means, collectively, all
of HOLDINGS and all such SUBSIDIARIES of HOLDINGS.

     "INTERCREDITOR AGREEMENT" means that certain Intercreditor Agreement dated
as of even date herewith by and among HOLDINGS, Bank of America National Trust
and Savings Association, as Agent, and RELIANCE, and the documents, instruments
and agreements executed and delivered in connection therewith, as all of the
same may be amended, restated, supplemented or otherwise modified from time to
time and any other intercreditor agreement in replacement thereof which is in
form and substance acceptable to RELIANCE.

     "LIEN" means any mortgage, deed of trust, pledge, security interest,
hypothecation, assignment, deposit arrangement to assure payment of DEBT,
encumbrance, lien (statutory or other), charge, or encumbrance of any kind or
nature whatsoever (including, without limitation, any conditional sale or other
title retention agreement, any financing lease having substantially the same
economic effect as any of the foregoing).

     "LIMITED SUBSIDIARY" means (a) any SUBSIDIARY which is not an INDEMNITOR
and (b) any INDEMNITOR which is not a wholly-owned SUBSIDIARY of HOLDINGS;
provided, that neither NATCO Limited Partnership nor North American Trailing
- --------                                                                    
Company shall be deemed to be a LIMITED SUBSIDIARY for purposes of this
Agreement.

     "LOSS" means:

     (a) All damages, costs, expenses (including all reasonable attorney fees
         and liabilities) which RELIANCE may sustain or incur by reason of
         executing or procuring the execution of the BOND(s), or any other

                                      -7-
<PAGE>
 
         BOND(s) which may be already or hereafter executed on behalf of any
         PRINCIPAL, or any renewal or continuation thereof; or which may be
         sustained or incurred by reason of making any investigation on account
         thereof, prosecuting or defending any action in connection therewith,
         obtaining a release, recovering or attempting to recover any salvage in
         connection therewith or enforcing by litigation or otherwise any of the
         provisions of this Agreement, including, but not limited to:

         (1) money judgments, amounts paid in settlement or compromise, the full
             amount of reasonable attorney and other professional fees incurred
             or paid by RELIANCE, court costs and fees, and interest at the
             prime rate or reference rate announced from time to time by Bank of
             America National Trust and Savings Association on all sums due it
             from the fifteenth day following RELIANCE's demand for said sums,
             whether or not interest has been awarded by a court, provided, that
                                                                  --------
             such LOSS is not due to the gross negligence, bad faith or willful
             misconduct of RELIANCE; and

         (2) any LOSS which RELIANCE may sustain or incur in connection with the
             CONTRACT(s) or BOND(s), whether that LOSS results from the activity
             of any PRINCIPAL individually or as part of a joint venture,
             partnership or other entity which has been or may be formed in
             connection with the performance of the CONTRACT(s) and in which any
             PRINCIPAL has an ownership interest, provided, that such LOSS is
                                                  --------
             not due to the gross negligence, bad faith or willful misconduct of
             RELIANCE; and

         (3) any LOSS which RELIANCE may sustain or incur as a result of any
             actions taken by RELIANCE upon information provided by any
             INDEMNITOR, provided, that such LOSS is not due to the gross
                         --------
             negligence, bad faith or willful misconduct of RELIANCE;

     (b) All reasonable legal and consulting fees and related expenses incurred
         in connection with any application or submission by any PRINCIPAL for a
         proposal, bid or other BOND, whether or not RELIANCE decides to issue
         said BOND; and

     (c) All premiums, fees, interest and other charges due RELIANCE in
         connection with this Agreement or the BOND(S).

     "LYDON" means Lydon Dredging & Construction Company, Ltd., a Canadian
corporation.

                                      -8-
<PAGE>
 
     "MATERIAL ADVERSE CHANGE" means a material adverse change in the condition
(financial or otherwise), business, operations or prospects of HOLDINGS and its
SUBSIDIARIES, taken as a whole.

     "MERGER AGREEMENT" means that certain Amended and Restated Agreement and
Plan of Merger dated as of August 19, 1998, among Vectura Holding Company LLC,
Great Lakes Dredge & Dock Acquisition, Inc., GLI Acquisition, Inc., HOLDINGS,
Great Lakes International, Inc., Blackstone Dredging Partners L.P. and
Blackstone Family Investment Partnership L.P.

     "NATCO" means NATCO Dredging Limited Partnership, a Delaware limited
partnership.

     "NET INCOME" means, for any period, the aggregate of all amounts (exclusive
of all amounts in respect of any extraordinary or non-recurring gain or loss
(including, without limitation, any write-off of the Chicago Flood litigation
insurance receivable)) which, in accordance with GAAP, would be included as net
income on a consolidated statement of income of HOLDINGS and its SUBSIDIARIES
for such period.

     "1998 DEBT INDENTURE" means that certain Indenture, dated as of August 19,
1998, between HOLDINGS, certain of the SUBSIDIARIES of HOLDINGS, and The Bank of
New York, as Trustee, governing the issuance by HOLDINGS of $115,000,000 in
original principal amount of its 11.25% Senior Subordinated Notes due 2008, as
amended, restated, supplemented or otherwise modified from time to time in
accordance with Section 6.21.
                ------------ 

     "NORTH AMERICAN" means North American Trailing Company, a Delaware
corporation.

     "OBLIGEE" means any named party or parties appearing on the BOND(s) in
whose favor the BOND(s) are issued.

     "ORIGINAL AGREEMENT" has the meaning set forth in the recitals to this
Agreement.

     "PAYMENT BLOCKAGE NOTICE" has the meaning assigned thereto in the 1998 DEBT
INDENTURE.

     "PERMITTED LIENS" means:

                                      -8-
<PAGE>
 
     (a) any LIEN in favor of RELIANCE;

     (b) LIENS securing the BANK LOAN FACILITY and the obligations arising
         thereunder (provided, that such LIENS are granted in compliance with 
                     --------
         and remain subject to the INTERCREDITOR AGREEMENT);

     (c) LIENS for taxes, assessments or other governmental charges or levies
         that are either not yet past due or that are being contested in good
         faith by appropriate proceedings and for which adequate reserves have
         been established in accordance with GAAP;

     (d) Carriers', warehousemen's, landlord's, mechanics', workmen's and
         repairmen's LIENS or other like LIENS arising by operation of law in
         the ordinary course of business and securing sums which are not past
         due, or that are being contested in good faith by appropriate
         proceedings and for which adequate reserves have been established in
         accordance with GAAP;

     (e) any LIEN on assets existing on the effective date of this Agreement and
         listed on Schedule 1.1 to this Agreement and the continuation of any
                   ------------
         such LIEN upon a refinancing, renewal or extension of the DEBT secured
         by such existing LIEN (provided, that the property subject to such LIEN
                                --------
         is limited to the property to which such LIEN is attached prior to the
         effective date of this Agreement and the principal amount of such DEBT
         as of the effective date of this Agreement is not increased);

     (f) any LIEN on capital equipment granted to secure the purchase price
         thereof;

     (g) any LIEN on capital equipment granted in connection with capitalized
         leases of such equipment in the ordinary course of business;

     (h) LIENS arising under workmen's compensation laws, unemployment insurance
         laws or other forms of governmental insurance or benefit, or to secure
         performance of bids, tenders, contracts (other than for borrowed money)
         or leases, or deposits to secure public or statutory obligations, or
         deposits of cash or United States Government bonds to secure surety or
         appeal bonds, or deposits as security for contested taxes or for the
         payment of rent or otherwise in the ordinary course of business;

     (i) survey exceptions, encumbrances, easements or reservations of, or
         rights of others for, rights-of-way, sewers, electric lines, telegraph
         or 

                                      -9-
<PAGE>
 
         telephone lines and other similar purposes, or zoning or other
         restrictions as to the use of real property or liens incidental to the
         conduct of such PRINCIPAL or to the ownership of its properties.

     (j) judgment LIENS not giving rise to an Event of Default so long as such
         LIEN is adequately bonded within 15 days after the entry of such
         judgment.

     (k) LIENS arising from filing UCC financing statements for precautionary
         purposes in connection with true leases of personal property under
         which HOLDINGS or any SUBSIDIARY is lessee;

     (l) any LIENS on any property or assets acquired by HOLDINGS or any of its
         SUBSIDIARIES which LIEN existed prior to the acquisition thereof and
         was not created in contemplation of such acquisition, provided, that
                                                               --------
         such LIENS attach only to the property or assets so acquired;

     (m) LIENS securing reimbursement obligations in respect of commercial
         letters of credit and covering the goods (or the documents of title in
         respect of such goods) financed by such letters of credit, which have
         been issued in the ordinary course of business;

     (n) any LIEN on any asset of any PERSON existing at the time such PERSON is
         merged or consolidated with or into HOLDINGS or any SUBSIDIARY of
         HOLDINGS (to the extent such merger or consolidation is permitted
         hereunder) and which LIEN was not created in contemplation of such
         event, provided, that such LIEN attaches only to the assets acquired
                --------                
         pursuant to such merger or consolidation;

     (o) LIENS securing any interest rate, swap, hedging, currency, commodity,
         foreign country risk or other similar agreement;

     (p) leases or subleases (including bareboat charters) granted and entered
         into with others not interfering in any material respect with the
         businesses of HOLDINGS and its SUBSIDIARIES;

     (q) LIENS securing payment of DEBT permitted and described in clause (m) of
         Section 6.12, and LIENS securing payment of DEBT permitted and 
         ------------
         described in clause (d) of Section 6.12 to the extent limited to the
                                    ------------
         accounts receivable financed with such DEBT;

     (r) renewals or replacements of any of the foregoing, provided that such
         renewed or replaced LIEN does not extend to property other than that 

                                     -10-
<PAGE>
 
         which was encumbered by the originally permitted LIEN hereunder; and

     (s) other LIENS securing obligations that do not exceed an aggregate amount
         of $5,000,000 at any time outstanding.

     "PERSON" means any entity, whether an individual, trustee, corporation,
partnership, joint stock company, limited liability company, unincorporated
organization, business association or firm, joint venture, a government or any
agent or instrumentality or political subdivision thereof.

     "PLAN" means any employee benefit plan (as defined in Section 3(3) of
ERISA) established, maintained or to which contributions have been made by any
PRINCIPAL.

     "PLEDGE AGREEMENT" means a Note Pledge Agreement substantially in the form
of Exhibit B hereto, executed by certain of the INDEMNITORS in favor of
   ---------                                                           
RELIANCE, as the same may be amended, restated, supplemented or otherwise
modified from time to time.

     "PRINCIPAL" means any of HOLDINGS, GLI, GLDDC, NATCO, LYDON, Gates
Construction Corp., a New Jersey corporation, and any other INDEMNITOR for whom
RELIANCE has executed a BOND; and PRINCIPALS means collectively all of the
foregoing PERSONS.

     "RELIANCE" has meaning set forth with recitals to this Agreement.

     "RESTRICTED AMOUNTS" means, as of any date, each of the following (a) all
DEBT and CONTINGENT LIABILITIES of the type described in clause (j) of Section
                                                         ----------    -------
6.12 outstanding on such date, (b) the fair market value of all assets sold from
- ----                                                                            
the date hereof through such date pursuant to the terms of clause (a)(iv)(B) of
                                                           -----------------   
Section 6.13, and (c) investments of the type described in clause (e) of Section
- ------------                                               ----------    -------
6.15 outstanding on such date.
- ----                          

     "SECURITY AGREEMENTS" means, collectively, the SECURITY AGREEMENT (A/R) and
the SECURITY AGREEMENT (EQUIPMENT).

     "SECURITY AGREEMENT (A/R)" means Security Agreement (Accounts Receivable)
substantially in the form of Exhibit C hereto, executed by a PRINCIPAL (other
                             ---------                                       
than LYDON) in favor of RELIANCE, as the same may be amended, restated,
supplemented or otherwise modified from time to time.

     "SECURITY AGREEMENT (EQUIPMENT)" means Security Agreement (Equipment)
substantially in the form of Exhibit D hereto, executed and delivered by GLDDC
                             ---------                                        
(or any other INDEMNITOR which executes a VESSEL MORTGAGE after the date hereof)
in favor of RELIANCE, as the same may be amended, restated, supplemented or
otherwise modified from time to time.

                                     -11-
<PAGE>
 
     "SUBORDINATED DEBT" means all DEBT of HOLDINGS issued pursuant to the 1998
DEBT INDENTURE.

     "SUBSIDIARY" of a PERSON means any corporation, association, partnership,
limited liability company, joint venture or other business entity of which more
than 50% of the voting stock or other equity interests, is owned or controlled
directly or indirectly by such PERSON, or one or more of the SUBSIDIARIES of
such PERSON, or a combination thereof.  Unless the context otherwise clearly
requires, references herein to a "SUBSIDIARY" refer to a SUBSIDIARY of HOLDINGS.

     "SUPPLEMENTAL SIGNATURE PAGE" means a supplemental signature page to this
Agreement in the form of Exhibit A hereto.
                         ---------        

     "UNDERWRITING DOCUMENTS" means this Agreement, each of the SECURITY
AGREEMENTS, the PLEDGE AGREEMENT, the VESSEL MORTGAGES, each BOND and any other
instrument, document or agreement delivered by any INDEMNITOR in connection
herewith.

     "VESSEL MORTGAGES" means, collectively, (i) the Amended and Restated First
Preferred Fleet Mortgage substantially in the form of Exhibit E hereto, executed
                                                      ---------                 
by GLDDC in favor of RELIANCE, (ii) the Second Preferred Fleet Mortgage
substantially in the form of Exhibit F hereto, executed by GLDDC in favor of
                             ---------                                      
RELIANCE, (iii) the First Preferred Fleet Mortgage dated March 7, 1990, by North
American Trailing Company to Reliance Insurance Company and certain of its
AFFILIATES, as amended by those certain Supplements to First Preferred Fleet
Mortgage dated as of October 15, 1991, September 24, 1997 and as of even date
herewith, (iv) the Second Preferred Fleet Mortgage dated July 10, 1990, by GLDDC
(as successor by merger to Tidewater Dredging Corporation) to Reliance Insurance
Company and certain of its AFFILIATES, as amended by those certain Supplements
to Second Preferred Fleet Mortgage dated as of October 15, 1991, September 24,
1997 and as of even date herewith, (v) the Second Preferred Fleet Mortgage dated
July 10, 1990, by GLDDC (as successor by merger to Tidewater Dredging
Corporation) to Reliance Insurance Company and certain of its AFFILIATES, as
amended by those certain Supplements to Second Preferred Fleet Mortgage dated as
of October 15, 1991, September 24, 1997 and as of even date herewith; and (vi)
any other fleet mortgages or vessel mortgages at any time hereafter executed and
delivered by any INDEMNITOR in connection with this Agreement and the other
UNDERWRITING DOCUMENTS; in each case as any of the foregoing documents may be
amended, restated, supplemented or otherwise modified from time to time.

     SECTION  1.2   USE OF DEFINED TERMS.  Any collective defined term and any
     ------------   --------------------                                      
defined term used in the plural shall be taken to encompass all members of the
relevant class.  Any defined term used in the singular preceded by "any" shall
be taken to indicate any number of the members of the relevant class.  Any
defined term used in the singular and preceded by the word "each" shall indicate
all members of the relevant class, individually.  A Section or an Exhibit or a
Schedule is, unless otherwise stated, a reference to a section hereof or an
exhibit or a 

                                     -12-
<PAGE>
 
schedule hereto, as the case may be. The words "hereof," "herein," "hereto" and
"hereunder" and words of similar import when used in this Agreement shall refer
to this Agreement as a whole and not to any particular provision of this
Agreement.

     SECTION  1.3   ACCOUNTING PRINCIPLES.  Unless the context otherwise clearly
                    ---------------------                                       
requires, all accounting terms not expressly defined herein shall be construed,
and all financial computations required under this Agreement shall be made, in
accordance with GAAP, consistently applied.

                                   ARTICLE II

                                 BOND FACILITY
                                        
     SECTION  2.1   BONDS.   Subject to the terms of this Agreement, RELIANCE
                    -----                                                    
agrees to provide or procure surety bonds for or on behalf of the PRINCIPALS;
provided, that RELIANCE reserves the right to decline to execute any BOND(s) and
- --------                                                                        
if RELIANCE executes any proposal or bid bond and if any PRINCIPAL is awarded
the CONTRACT(s), RELIANCE shall not be obligated to execute any BOND(s) required
to perform the awarded contract.  No claim shall be made, nor any cause of
action asserted against RELIANCE as a consequence of its failure to execute any
BOND(s).

     SECTION  2.2   PREMIUM PAYMENT.  Each PRINCIPAL agrees to pay all premiums
                    ---------------                                            
on the BOND(s) issued for such PRINCIPAL, computed in accordance with the
regular manual of rates in effect on the date such BOND(s) are executed; such
payments to be made within 45 days of receipt by INDEMNITORS of a statement
therefor from RELIANCE pursuant to the payment directions stated therein or as
otherwise agreed to between INDEMNITORS and RELIANCE.  The failure of any
PRINCIPAL to pay the bond premiums or the failure of RELIANCE to receive
premiums shall not provide INDEMNITORS with any defense to an action under this
Agreement.

                                  ARTICLE III

                                INDEMNIFICATION
                                        
     SECTION  3.1   INDEMNITY.  INDEMNITORS agree to indemnify, and keep
                    ---------                                           
indemnified, and hold and save harmless RELIANCE against all LOSS; provided,
                                                                   -------- 
that in no event shall any INDEMNITOR indemnify or hold harmless RELIANCE
against any LOSS arising out of the gross negligence, bad faith or willful
misconduct of RELIANCE.  The duty of INDEMNITORS to indemnify RELIANCE is a
continuing duty, separate from the duty to exonerate, and survives any payments
made in exoneration of RELIANCE.  Amounts due RELIANCE pursuant to this Section
shall be payable within fifteen (15) days of receipt by INDEMNITORS of written
demand therefor.  Notwithstanding anything to the contrary herein, any
INDEMNITOR which is not a wholly-owned SUBSIDIARY of HOLDINGS shall indemnify
and hold and save RELIANCE harmless only as to any LOSS incurred by or on behalf
of such INDEMNITOR; provided, that (a) NORTH AMERICAN shall indemnify and hold
                    --------                                                  
and 

                                     -13-
<PAGE>
 
save RELIANCE harmless as to any LOSS incurred by or on behalf of NATCO and (b)
NATCO shall indemnify and hold and save RELIANCE harmless as to any LOSS
incurred by or on behalf of NORTH AMERICAN.

     SECTION  3.2   EXONERATION.  INDEMNITORS recognize and acknowledge the
                    -----------                                            
common law right of RELIANCE to be exonerated by PRINCIPAL for any LOSS arising
out of any surety obligation undertaken by RELIANCE in connection with any BOND,
provided, that in no event shall any INDEMNITOR exonerate RELIANCE for any LOSS
- --------                                                                       
arising out of the gross negligence, bad faith or willful misconduct of
RELIANCE.  In the event any PRINCIPAL fails or refuses to exonerate RELIANCE for
any LOSS upon written demand therefor, all INDEMNITORS other than such PRINCIPAL
agree, upon such demand by RELIANCE, to exonerate RELIANCE from LOSS to the same
extent such INDEMNITORS agree to indemnify RELIANCE as provided in Sections 3.1,
                                                                   ------------ 
by satisfying such PRINCIPAL's obligations under the CONTRACT(s) and obtaining
either a withdrawal of all claims against RELIANCE under the BOND(s) or a
general release. Notwithstanding anything to the contrary contained herein, any
INDEMNITOR which is not a wholly-owned SUBSIDIARY of HOLDINGS shall exonerate
RELIANCE only as to BONDS issued for or on behalf of such INDEMNITOR; provided,
                                                                      -------- 
that (a) NORTH AMERICAN shall exonerate RELIANCE as to BONDS issued for or on
behalf of NATCO and (b) NATCO shall exonerate RELIANCE as to BONDS issued for or
on behalf of NORTH AMERICAN.

     SECTION  3.3   CASH COLLATERAL.  Upon refusal or failure of any PRINCIPAL
                    ---------------                                           
to exonerate RELIANCE in accordance with the terms hereof, INDEMNITORS agree
upon demand to deposit with RELIANCE an amount of money or other collateral of
value adequate in the reasonable judgment of RELIANCE to exonerate RELIANCE,
such funds to be held by RELIANCE as collateral pursuant to documentation
reasonably acceptable to RELIANCE, with the right to use such funds or any part
thereof at any time in payment or compromise of such LOSS, and in which funds
INDEMNITORS do hereby grant to RELIANCE a security interest to secure such LOSS.
Unexpended funds by RELIANCE pursuant to a request for exoneration hereunder
shall be repaid to HOLDINGS and its SUBSIDIARIES when the liability of RELIANCE
arising out of the event for which exoneration was requested has been resolved
to the reasonable satisfaction of RELIANCE and RELIANCE shall have been
furnished with full releases of all liability under a surety obligation and have
been reimbursed in full for all LOSS.  Interest earned (if any) upon funds held
by RELIANCE pursuant to a request for exoneration under this Section which is
not otherwise expended in accordance with this Section shall be paid to HOLDINGS
and its SUBSIDIARIES.

     SECTION  3.4   WAIVER OF CLAIMS AND HOLD HARMLESS.  Each INDEMNITOR
                    ----------------------------------                  
specifically agrees to protect, indemnify and hold harmless RELIANCE, each of
its officers, directors, employees, agents and its attorneys-in-fact against any
and all LOSS that may in any way arise in connection with this Agreement and the
other UNDERWRITING DOCUMENTS and the powers herein granted, specifically waiving
any claim which any INDEMNITOR has or might hereafter have against RELIANCE or
its attorneys-in-fact on account of anything done in enforcing the terms of this
Agreement, the BOND(s) or any other 

                                     -14-
<PAGE>
 
UNDERWRITING DOCUMENT except for any LOSS due to the gross negligence, bad
faith, or willful misconduct of RELIANCE.

     SECTION  3.5   WITHDRAWAL FROM AND TERMINATION OF AGREEMENT.  Each
                    --------------------------------------------       
INDEMNITOR expressly recognizes and covenants this Agreement as its continuing
obligation to protect RELIANCE from all LOSS. Any INDEMNITOR may notify RELIANCE
in writing, of such INDEMNITOR's withdrawal from this Agreement; and such notice
shall state when, not less than fifteen (15) days after receipt of such notice
by RELIANCE, such withdrawal shall be effective.  Such INDEMNITOR will not be
liable under this Agreement as to any BOND(s) executed by RELIANCE after the
effective date of such notice; provided, that as to any and all such BOND(s)
                               --------                                     
executed or authorized by RELIANCE prior to the effective date of such notice
and as to any and all renewals, continuations, extensions, or substitutions
(and, if a proposal or bid bond has been executed or authorized prior to such
effective date, as to any contract bond executed pursuant thereto) regardless of
when the same are executed, such INDEMNITOR shall be and remain fully liable
hereunder, as if notice had not been served.  Withdrawal by any INDEMNITOR shall
in no way affect the obligation of any other INDEMNITOR who has given no notice
of termination to RELIANCE.
 
     (b)    HOLDINGS may notify RELIANCE of the termination of this Agreement by
delivering written notice of such termination to RELIANCE, such termination to
be effective on a date specified in such notice which date shall not be less
than fifteen (15) days from receipt of such notice; provided, that no such
                                                    --------              
termination shall be effective at any time when any BONDS shall remain
outstanding or any obligations under this Agreement shall remain unpaid.

     SECTION  3.6   INDEMNITORS AGREE TO BECOME PARTY DEFENDANTS.  In the event
                    --------------------------------------------               
of legal proceedings against RELIANCE arising out of this Agreement or the
BONDS, RELIANCE may apply for a court order making any or all of the INDEMNITORS
party defendants, and each INDEMNITOR consents to the granting of such
application, including consent to the jurisdiction of the court in which the
application is made, and agrees to become such a party defendant or third-party
defendant and to allow judgment, in the event of judgment against RELIANCE, to
be rendered also against each INDEMNITOR, jointly and severally, in like amount
and in favor of RELIANCE unless such judgment is due to the gross negligence,
bad faith or willful misconduct of RELIANCE.

     SECTION  3.7   INDEMNITORS' WAIVER OF NOTICE.  INDEMNITORS waive notice of
                    -----------------------------                              
the execution, continuation, modification, renewal, enlargement or amendment of
any BOND and of any fact, act or information concerning or affecting the rights
or liabilities of RELIANCE or INDEMNITORS including, but not limited to, any
acts giving rise to any LOSS under the BOND(s).

     SECTION  3.8   INDEMNITORS' KNOWING CONSENT TO AGREEMENT.  Each INDEMNITOR
                    -----------------------------------------                  
warrants that it is specifically and beneficially interested in obtaining the
BOND(s) or the forbearance of cancellation of any existing BOND(s).  INDEMNITORS

                                     -15-
<PAGE>
 
acknowledge that the execution of this Agreement and the undertaking of
indemnity was not made in reliance upon any representation concerning the
responsibility of any INDEMNITOR or concerning the competence of PRINCIPAL to
perform. INDEMNITORS agree to make no claim against RELIANCE for any oral
representations, promises or statements made to any of them by RELIANCE or any
of its agents or brokers, or for the failure of RELIANCE to disclose facts or
information to INDEMNITORS.

     SECTION  3.9   INDEMNITORS' DUTY TO REMAIN INFORMED OF PRINCIPAL'S
                    ---------------------------------------------------
BUSINESS.  INDEMNITORS possess the duty to remain informed of all aspects of
each PRINCIPAL's business and the business activities and financial affairs of
each PRINCIPAL.  INDEMNITORS acknowledge that they are presently informed of the
state of business activities and financial affairs of each PRINCIPAL and all
INDEMNITORS.  RELIANCE possesses no obligation to inform any INDEMNITOR of any
aspect of any PRINCIPAL's business or the business activities and financial
affairs of the INDEMNITORS or of the request for, or issuance of, any BOND(s).

     SECTION  3.10  ENFORCEABILITY OF RIGHTS DIRECTLY AGAINST INDEMNITORS.
                    -----------------------------------------------------  
RELIANCE shall be entitled to enforce the obligations of this AGREEMENT directly
against any INDEMNITOR without the necessity of first proceeding against the
PRINCIPAL.  The failure of any INDEMNITOR to perform any of the terms of this
Agreement or the release of any INDEMNITOR by RELIANCE shall not excuse or
release the remaining INDEMNITORS from their obligations under this Agreement.

                                  ARTICLE  IV

                             CONDITIONS PRECEDENT
                                        
     SECTION  4.1   CONDITION PRECEDENT TO EFFECTIVENESS OF THIS AGREEMENT. The
                    ------------------------------------------------------     
effectiveness of this Agreement is subject to the condition precedent that
RELIANCE shall have received on or before the day hereof each of the following,
in form and substance satisfactory to RELIANCE and its counsel:

     (a)    a SECURITY AGREEMENT (A/R) duly executed by each PRINCIPAL (other
than LYDON) and, unless already filed, executed Financing Statements (UCC-1) to
be filed in all jurisdictions in the opinion of RELIANCE desirable to perfect
the security interest created by such SECURITY AGREEMENT (A/R);

     (b)    The VESSEL MORTGAGES duly executed by the mortgagee party thereto,
together with (i) any supplements thereto as applicable, and (ii) proper
documentation releasing all other LIENS, if any, on the related vessels;

     (c)    a SECURITY AGREEMENT (EQUIPMENT) duly executed by each INDEMNITOR
party to a VESSEL MORTGAGE and, unless already filed, executed Financing
Statements (UCC-1) to be filed in all jurisdictions in the opinion of 

                                     -16-
<PAGE>
 
RELIANCE desirable to perfect the security interest created by such SECURITY
AGREEMENT (EQUIPMENT);

     (d)    The PLEDGE AGREEMENT duly executed by the INDEMNITORS referenced on
the signature pages thereto together with a photocopy of the Master Intercompany
Demand Note, evidence that Bank of America National Trust and Savings
Association, as administrative agent under the BANK LOAN FACILITY is in receipt
of the original of such Note and executed Financing Statements (UCC-1) to be
filed in all jurisdictions in the opinion of RELIANCE desirable to perfect the
security interest created by such PLEDGE AGREEMENT;

     (e)    The INTERCREDITOR AGREEMENT and the Proceeds Agent Agreement
contemplated thereby, duly executed by the PRINCIPALS, RELIANCE and the other
parties thereto;

     (f)    A favorable opinion of Winston & Strawn, counsel to the PRINCIPALS
and INDEMNITORS, addressing such legal matters as RELIANCE may require;

     (g)    A secretary's certificate of HOLDINGS certifying that the BANK LOAN
FACILITY and the 1998 DEBT INDENTURE are in full force and effect and attaching
copies of all documentation related thereto;

     (h)    An officer's certificate of each INDEMNITOR certifying copies of
such party's organizational documents, appropriate resolutions authorizing the
execution, delivery and performance of this Agreement and the other UNDERWRITING
DOCUMENTS to which such party is a party and certifying incumbencies and true
signatures of its officers so authorized;

     (i)    Evidence of the good standing of each INDEMNITOR in the jurisdiction
in which such party is organized;

     (j)    Evidence of the existence of insurance on the property of each
PRINCIPAL, together with evidence establishing RELIANCE as a loss payee and/or
additional insured on all insurance policies relating to any tangible property
on which RELIANCE has a first LIEN under the VESSEL MORTGAGES and the SECURITY
AGREEMENT (EQUIPMENT);

     (k)    Such other information and documents as may reasonably be required
by RELIANCE.

     SECTION  4.2   CONDITIONS PRECEDENT TO ALL BONDS.  The obligation of
                    ---------------------------------                    
RELIANCE to issue any BOND shall be subject to the further conditions precedent
that on the date of such issuance:

                                     -17-
<PAGE>
 
        (a)     The following statements shall be true and, by its request for
the issuance of such BOND, the applicable PRINCIPAL shall be deemed to have
certified to RELIANCE that as of the date of such issuance:

                (i)     The representations and warranties contained in 
        Article V of this Agreement, in Section 4 of each SECURITY AGREEMENT
        ---------                       ---------
        (A/R), in Section 4 of each SECURITY AGREEMENT (EQUIPMENT), in Section 4
                  ---------                                            ---------
        of the PLEDGE AGREEMENT and in Article I of each of the VESSEL MORTGAGES
                                       ---------
        are correct in all material respects on and as of the date of such
        issuance as though made on and as of such date except to the extent
        stated to relate to an earlier date, in which case such representation
        and warranty shall be correct as of such earlier date; and

                (ii)    No EVENT OF DEFAULT has occurred and is continuing, or
        would result from the issuance of such BOND;

        (b)     RELIANCE shall have received each of the following:

                (i)     a SECURITY AGREEMENT (A/R) duly executed by the
        PRINCIPAL (other than LYDON) for whom such BOND is issued unless such
        PRINCIPAL previously delivered a SECURITY AGREEMENT (A/R) pursuant to
        SECTION 4.1(a), together with acknowledgment copies of the Financing
        Statements (UCC-1) required to be filed pursuant to SECTION 4.1(a); and
                                                            --------------     

                (ii)    such other approvals and documents as RELIANCE may
        reasonably request.

                                   ARTICLE V

                         REPRESENTATIONS AND WARRANTIES

        The PRINCIPALS represent and warrant to RELIANCE that

        SECTION  5.1   INCORPORATION, GOOD STANDING, AND DUE QUALIFICATION.
                       ---------------------------------------------------  
HOLDINGS and each SUBSIDIARY:  (a) is a corporation or other legal entity duly
organized, validly existing and in good standing under the laws of the
jurisdiction of its organization; (b) has the organizational power and
authority, and has all material governmental licenses, authorizations, consents
and approvals, necessary to own its assets and to transact the business in which
it is now engaged or proposed to be engaged, except to the extent the failure
thereof could not reasonably be expected to have a MATERIAL ADVERSE CHANGE; and
(c) is duly qualified as a foreign organization and in good standing under the
laws of each other jurisdiction in which such qualification is required except
to the extent the failure to so qualify could not reasonably be expected to name
a MATERIAL ADVERSE CHANGE.


                                     -18-
<PAGE>
 
     SECTION  5.2   CORPORATE POWER AND AUTHORITY.  The execution, delivery, and
                    -----------------------------                               
performance by each PRINCIPAL and each INDEMNITOR of the UNDERWRITING DOCUMENTS
to which each is a party have been duly authorized by all necessary
organizational and stockholder action and do not and will not (a) contravene
such party's organizational documents; (b) violate any provision of any material
law, rule, regulation, order, writ, judgment, injunction, decree, determination,
or award presently in effect having applicability to such party; (c) result in a
breach of or constitute a default under any material indenture or loan or credit
agreement or any other material agreement, lease, or instrument to which such
party is a party or by which it or its properties may be bound or affected
(except where the appropriate consents have been obtained); (d) result in, or
require, the creation or imposition of any Lien (except LIENS in favor of
RELIANCE and LIENS arising under the BANK CREDIT FACILITY), upon or with respect
to any of the properties now owned or hereafter acquired by such party; or (e)
cause such party to be in default under any such law, rule regulation, order,
writ, judgment, injunction, decree, determination, or award or any such
indenture, agreement, lease, or instrument (except where the appropriate
consents have been obtained).

     SECTION  5.3   LEGALLY ENFORCEABLE AGREEMENT.  This Agreement is, and each
                    -----------------------------                              
of the other UNDERWRITING DOCUMENTS when delivered under this Agreement will be,
legal, valid, and binding obligations of each PRINCIPAL and each INDEMNITOR
party thereto, enforceable against such PRINCIPAL or INDEMNITOR, as the case may
be, in accordance with their respective terms, except to the extent that such
enforcement may be limited by applicable bankruptcy, insolvency, reorganization,
moratorium and other similar laws affecting creditors' rights generally and by
equitable principles (regardless of whether enforcement is sought at law or in
equity).

     SECTION  5.4   APPROVALS.  Except for filings and recordings of Liens
                    ---------                                             
created pursuant to the SECURITY AGREEMENTS and the VESSEL MORTGAGES, as of the
date of this Agreement, no authorizations, approvals or consents of, and no
filings or registrations with, any governmental or regulatory authority or
agency are necessary for the execution, delivery or performance by each
PRINCIPAL and each INDEMNITOR of the UNDERWRITING DOCUMENTS to which each is a
party or for the validity or enforceability thereof, other than those which have
been heretofore made or obtained.

     SECTION  5.5   OWNERSHIP AND LIENS.  Each of HOLDINGS and each SUBSIDIARY
                    -------------------                                       
has title to, or valid leasehold interests in, all of its properties and assets,
real and personal, that are necessary for conduct of such Person's business and
none of the material properties and assets owned by HOLDINGS or any SUBSIDIARY
and none of their respective material leasehold interests is subject to any
LIEN, except such as may be permitted pursuant to Section 6.11 of this
                                                  ------------        
Agreement.

     SECTION  5.6   TAXES.  Each of HOLDINGS and each SUBSIDIARY has filed all
                    -----                                                     
material tax returns (federal, state, and local) required to be filed and has
paid all taxes, assessments, and governmental charges and levies thereon to be
due, including interest and 

                                     -19-
<PAGE>
 
penalties, except to the extent the validity thereof is being contested in good
faith by appropriate proceedings and for which adequate reserves have been set
aside on its books in accordance with GAAP.

     SECTION  5.7   INSURANCE.  As of the date of this Agreement, each PRINCIPAL
                    ---------                                                   
has insurance in force as disclosed in Schedule 5.7 attached hereto and made a
                                       ------------                           
part hereof.

     SECTION  5.8   COMPLIANCE.  Each of HOLDINGS and each SUBSIDIARY is in
                    ----------                                             
material compliance with all statutes and governmental rules and regulations
applicable to it, including without limitation, ERISA insofar as ERISA applies
to it, except to the extent the failure to be in compliance therewith could not
reasonably be expected to have a MATERIAL ADVERSE CHANGE.  No condition exists
or event or transaction has occurred in connection with any PLAN which could
result in any liability, fine or penalty being asserted against HOLDINGS or any
SUBSIDIARY, in an aggregate amount in excess of $5,000,000.

     SECTION  5.9   LITIGATION.   There is no action, suit or proceeding pending
                    ----------                                                  
against, or to the knowledge of HOLDINGS threatened against or affecting,
HOLDINGS or any SUBSIDIARY before any court or arbitrator or any government
body, agency or official in which there is a reasonable likelihood of an adverse
decision which could reasonably be expected to have a MATERIAL ADVERSE CHANGE or
which in any manner draws into question the validity of this Agreement except
those referred to in Schedule 5.9 attached hereto and made a part hereof.
                     ------------                                        

     SECTION  5.10  SUBSIDIARIES.  Schedule 5.10 attached hereto and made a part
                    ------------   -------------
hereof sets forth a complete and accurate list, as of the date of this
Agreement, of each SUBSIDIARY of HOLDINGS and each SUBSIDIARY set forth on
Schedule 5.10 and designated with an asterisk ("*") is a wholly-owned SUBSIDIARY
- -------------                                                                   
of HOLDINGS.

     SECTION  5.11  REAL PROPERTY.  Schedule 5.11 contains a complete and
                    -------------   -------------                        
accurate list, as of the date of this Agreement, of the address of any real
property owned or leased by each PRINCIPAL with a net book value in excess of
$500,000.

     SECTION  5.12  EQUIPMENT.  Schedule 5.12 attached hereto and made a part
                    ---------   -------------                                
hereof sets forth a complete and accurate list, as of the date of this
Agreement, of each item of equipment with a net book value in excess of $500,000
owned or leased by each PRINCIPAL.

     SECTION  5.13  VESSELS.  Schedule 5.13 attached hereto and made a part
                    -------   -------------                                
hereof sets forth a complete and accurate list, as of the date of this
Agreement, of all vessels owned of record by any PRINCIPAL with a net book value
in excess of $500,000 and, except as set forth on Schedule 5.13, each such
                                                  -------------           
vessel has all certificates required under applicable law (except where the
failure could not reasonably be expected to have a MATERIAL ADVERSE CHANGE),
including, without limitation, certificates of documentation, and, except as set
forth on Schedule 5.13, each such vessel has been certified by the U.S. Coast
         -------------                                                       
Guard. Each such certificate is in full force and effect and each such vessel is
in seaworthy and operational condition.  Reliance Insurance Company, as Agent,
has (or will have upon proper filing of the 

                                     -20-
<PAGE>
 
VESSEL MORTGAGES with the U.S. Coast Guard) a perfected security interest,
arising pursuant to the VESSEL MORTGAGES, in each vessel set forth on 
Schedule 5.13 and designed with an asterisk.
- -------------                              

                                   ARTICLE VI

                                   COVENANTS

     So long as any BONDS shall remain outstanding, HOLDINGS hereby covenants
and agrees with RELIANCE as follows:

     SECTION  6.1   CORPORATE EXISTENCE.  HOLDINGS will, and will cause each
                    -------------------                                     
SUBSIDIARY to, maintain its legal existence (in good standing where appropriate
under local law) and remain or become duly qualified or licensed (and in good
standing where appropriate under local law) as a foreign organization in each
jurisdiction in which the conduct of its businesses or location of its assets
requires such qualification or license, except where the failure to take any
such action could not in the aggregate reasonably be expected to have a MATERIAL
ADVERSE CHANGE.

     SECTION  6.2   MAINTENANCE OF RECORDS.  HOLDINGS will, and will cause each
                    ----------------------                                     
SUBSIDIARY to, keep adequate records and books of account, in which complete
entries will be made in accordance with GAAP consistently applied.

     SECTION  6.3   MAINTENANCE OF PROPERTIES.  HOLDINGS will, and will cause
                    -------------------------                                
each SUBSIDIARY to, maintain, keep and preserve all of its properties (tangible
and intangible) necessary or useful in its business in good working order and
condition, ordinary wear and tear and damage caused by casualty excepted.

     SECTION  6.4   MAINTENANCE OF INSURANCE.  HOLDINGS will, and will cause
                    ------------------------                                
each SUBSIDIARY to, maintain insurance with financially sound and reputable
insurance companies or associations in such amounts and covering such risks as
are usually carried by companies engaged in the same or a similar business and
similarly situated, which insurance may provide for reasonable deductibility
from coverage thereof.  HOLDINGS further agrees to furnish RELIANCE upon written
request with an annual report on the insurance in force and with copies of the
policies of said insurance evidencing the existence of the coverage called for
by this Agreement.

     SECTION  6.5   COMPLIANCE WITH LAWS.  HOLDINGS will, and will cause each
                    --------------------                                     
SUBSIDIARY to, comply in all respects with all applicable laws, rules,
regulations, and orders the failure to comply with which could reasonably be
expected to have a MATERIAL ADVERSE CHANGE, such compliance to include, without
limitation, paying before the same become delinquent all material taxes,
assessments, and governmental charges imposed upon it or upon its property,
except taxes, assessments and governmental charges being contested in good faith
by appropriate proceedings and for which adequate reserves have been set aside
on its books in accordance with GAAP.


                                     -21-
<PAGE>
 
     SECTION  6.6   TAXES.  HOLDINGS will, and will cause each SUBSIDIARY to,
                    -----                                                    
promptly pay all of its material taxes, assessments and other governmental
charges prior to the date on which all penalties are attached thereto; provided,
                                                                       -------- 
that nothing herein contained shall be interpreted to require the payment of any
tax, assessment or charge so long as its validity is being contested in good
faith by appropriate proceedings and for which adequate reserves have been set
aside on its books in accordance with GAAP.

     SECTION  6.7   BOOKS AND RECORDS.  Until RELIANCE shall have been furnished
                    -----------------                                           
with evidence satisfactory to it that it has been discharged from its
obligations under all BONDS without LOSS, upon reasonable prior notice RELIANCE
shall have the right at reasonable times during normal business hours to free
access to the books and records of each of HOLDINGS and its SUBSIDIARIES,
including, without limitation, its books, records, accounts, computer software
and other computer-stored information, for the purpose of examining, copying, or
reproducing the same.  Following the occurrence and during the continuance of an
EVENT OF DEFAULT, each PRINCIPAL authorizes and requests any and all
depositories in which funds of such PRINCIPAL may be deposited to furnish to
RELIANCE upon RELIANCE's written request statements of its account and any other
documents reflecting its receipts and disbursements, and any PERSON doing
business with such PRINCIPAL is authorized to furnish any information requested
by RELIANCE concerning any transaction.  Subject to Section 8.11, RELIANCE may
                                                    ------------              
furnish copies of any and all statements, agreements and FINANCIAL STATEMENTS
and any information which it now has or may obtain concerning each of HOLDINGS
and its SUBSIDIARIES to other PERSONS for the purpose of procuring co-suretyship
or reinsurance.

     SECTION  6.8   FINANCIAL RECORDS AND REPORTS.  HOLDINGS will provide
                    -----------------------------                        
RELIANCE with copies of yearly audited FINANCIAL STATEMENTS of HOLDINGS and its
SUBSIDIARIES on a consolidated basis as soon as possible upon completion and in
no event later than ninety (90) days after the end of the period under audit.
In addition, HOLDINGS will furnish RELIANCE with true copies of quarterly
unaudited FINANCIAL STATEMENTS of HOLDINGS and its SUBSIDIARIES on a
consolidated basis, and such other financial information in a form as RELIANCE
may reasonably request, upon completion and in no event later than forty-five
(45) days after the end of each of the first three fiscal quarters of each
fiscal year.  The FINANCIAL STATEMENTS to be provided by HOLDINGS will be
prepared in conformity with GAAP (except, with respect to unaudited FINANCIAL
STATEMENTS, for the absence of footnotes and subject to year-end audit
adjustments) applied on a basis consistent with that of the preceding fiscal
year and in each instance will present fairly and accurately the financial
condition of HOLDINGS and its SUBSIDIARIES on a consolidated basis as at the
dates of the statements and the results of their operations for the periods then
ended.  HOLDINGS agrees to promptly notify RELIANCE of the occurrence of any
MATERIAL ADVERSE CHANGE.

     SECTION  6.9   PRINCIPALS' REPRESENTATION.  HOLDINGS will provide RELIANCE
                    --------------------------                                 
on a quarterly basis with a letter in which an AUTHORIZED OFFICER of HOLDINGS
represents that to his or her knowledge, as of the date of such quarter end, no

                                     -22-
<PAGE>
 
condition, event or act exists which constitutes, or which with notice or the
lapse of time, or both, would constitute an EVENT OF DEFAULT.  This letter shall
accompany each delivery of FINANCIAL STATEMENTS required by Section 6.8 hereof.
                                                            -----------        

     SECTION  6.10  NOTICE OF LITIGATION.  HOLDINGS shall promptly give notice
                    --------------------                                      
in writing to RELIANCE of (a) any litigation filed or threatened against
HOLDINGS or any of its SUBSIDIARIES involving an amount in excess of $5,000,000
which claim is not covered by insurance and (b) all litigation filed against any
INDEMNITOR associated with any CONTRACT with respect to which five or more
separate litigation matters are then pending.

     SECTION  6.11  LIENS.  HOLDINGS will not, and will not permit any
                    -----                                             
SUBSIDIARY to create, incur, assume, or suffer to exist any LIEN upon any of its
properties or assets now owned or hereafter acquired, except for PERMITTED
LIENS.

     SECTION  6.12  DEBT AND CONTINGENT LIABILITIES.  HOLDINGS will not, and
                    -------------------------------                         
will not permit any SUBSIDIARY to, incur, assume, or suffer to exist any DEBT or
CONTINGENT LIABILITY, except for:

     (a)   DEBT and CONTINGENT LIABILITY existing at the effective date of
this Agreement and disclosed on Schedule 6.12 attached hereto and any renewals,
                                -------------
extensions, refinancings or replacements thereof, provided, that the terms
                                                  --------
thereof are not materially more burdensome on the INDEMNITORS than the existing
terms ;

     (b)   endorsement of instruments for deposit or collection in the ordinary
course of business;

     (c)   CONTINGENT LIABILITIES in connection with third party leases,
repurchase agreements or sales in the ordinary course of business;

     (d)   DEBT and CONTINGENT LIABILITIES in respect of factoring or
financing of accounts receivable with respect to any contract or series of
contracts under which the amounts payable to HOLDINGS or any SUBSIDIARY are
payable in whole or in part in the currency of any country other than the United
States of America, sold or pledged on a non-recourse basis in an aggregate
amount not to exceed $10,000,000;

     (e)   DEBT of the PRINCIPALS and INDEMNITORS arising under this Agreement
and under the other UNDERWRITING DOCUMENTS;

     (f)   DEBT and CONTINGENT LIABILITIES arising under (i) the BANK LOAN
FACILITY; provided, that the aggregate principal amount of all loans plus the
          --------                                                           
undrawn face amount of all letters of credit outstanding under the BANK LOAN
FACILITY shall at no time exceed $130,000,000; and (ii) the 1998 DEBT INDENTURE;
provided, that the aggregate principal amount outstanding under the 1998 DEBT
- --------                                                                     
INDENTURE shall at no time exceed $115,000,000;

                                     -23-
<PAGE>
 
     (g)   DEBT and CONTINGENT LIABILITIES under or in respect of capital
leases;

     (h)   DEBT of HOLDINGS to any SUBSIDIARY and DEBT of any SUBSIDIARY to
HOLDINGS or any other SUBSIDIARY to the extent permitted by Section 6.15;
                                                            ------------ 

     (i)   DEBT consisting of deferred payment obligations of a PRINCIPAL
for insurance premiums or of funds borrowed for the payment of such premiums;

     (j)   CONTINGENT LIABILITIES consisting of guaranties by HOLDINGS or
any SUBSIDIARY of obligations of HOLDINGS or any SUBSIDIARY, as the case may be,
under any DEBT otherwise permitted hereunder or under any lease or other
agreement (not representing DEBT) entered into in the ordinary course of
business; provided, that the aggregate amount of such CONTINGENT LIABILITIES of
          --------
INDEMNITORS relating to DEBT of LIMITED SUBSIDIARIES, when added to the other
RESTRICTED AMOUNTS then outstanding, shall not exceed at any time $30,000,000;

     (k)   DEBT incurred in the ordinary course of business in the nature
of open accounts (extended by suppliers on normal trade terms in connection with
purchasers of goods or services) accrued liabilities and deferred income, taxes
and judgements or orders for the payment of money to the extent such judgments
or orders do not result in any EVENT OF DEFAULT;

     (l)   DEBT and CONTINGENT LIABILITIES incurred to finance the acquisition
of assets in the ordinary course of business so long as the amount of such DEBT
does not exceed the purchase price of the assets acquired with the proceeds
thereof;

     (m)   DEBT arising from the issuance of license, bid, performance and
lien bonds, and other undertakings or instruments of guaranty, whether issued by
RELIANCE or any other surety for the benefit of HOLDINGS or any SUBSIDIARY;

     (n)   DEBT incurred in connection with any interest rate hedging
transaction, foreign currency or commodity hedging transactions, foreign
exchange contract or other similar arrangement entered into by HOLDINGS or any
SUBSIDIARY;

     (o)   CONTINGENT LIABILITIES consisting of guaranties by HOLDINGS or
any SUBSIDIARY of obligations of Amboy Aggregates, a New Jersey joint venture,
and its SUBSIDIARIES; provided, that the aggregate amount of such CONTINGENT
                      --------
LIABILITIES of INDEMNITORS, shall not exceed at any time $17,000,000;

     (p)   DEBT OF SUBSIDIARIES which represents the assumption by such
SUBSIDIARIES of DEBT of another SUBSIDIARY in connection with the merger of 

                                     -24-
<PAGE>
 
such other SUBSIDIARY with and into the assuming SUBSIDIARY or the purchase of
all or substantially all of the assets of such other SUBSIDIARY;

     (q)   all premiums, interest, fees, expenses, indemnities, charges and
additional or contingent interest on obligations described in this Section 6.12;
                                                                   ------------ 

     (r)   [Reserved]

     (s)   other DEBT of HOLDINGS and its SUBSIDIARIES in an aggregate
amount, determined on a consolidated basis with respect to HOLDINGS and its
SUBSIDIARIES, at any time outstanding not to exceed $5,000,000.

     SECTION  6.13  DISPOSITION OF ASSETS; ISSUANCE OF EQUITY.
                    ----------------------------------------- 

     (a)   Except for PERMITTED LIENS, HOLDINGS will not, and will not
permit its SUBSIDIARIES to, sell, lease, transfer, or otherwise dispose of its
assets whether now owned or hereafter acquired except for

           (i)     sales of inventory in the ordinary course of business,

           (ii)    the sale or other disposition of any investment of the
     type described in clauses (a) through (e), (h) and (j) of Section 6.15,
                                                               ------------

           (iii)   a disposition made in connection with a sale and
     leaseback transaction involving the sale or disposition of capital assets,
     provided (A) such sale or disposition is for an amount not less than the
     fair market value thereof and (B) any DEBT arising in connection therewith
     is permitted by Section 6.12,
                     ------------

           (iv)    a sale, lease or other disposition that either (A) is
     made in the ordinary course of business for fair market value, (B) is a
     sale, lease or transfer from HOLDINGS to any SUBSIDIARY or from a
     SUBSIDIARY to HOLDINGS or any other SUBSIDIARY; provided, that, in the case
                                                     --------
     of a sale, lease or other disposition by HOLDINGS or any SUBSIDIARY which
     is not a LIMITED SUBSIDIARY to a LIMITED SUBSIDIARY, the fair market value
     of such assets, when added to the other RESTRICTED AMOUNTS then
     outstanding, shall not exceed at any time $30,000,000 or (C) is a lease (on
     a short-term or long-term basis) to another Person of assets no longer
     useful or necessary in the operations of businesses of HOLDINGS and its
     SUBSIDIARIES,

           (v)     a sale or other disposition of assets no longer useful
     or necessary in the operations or businesses of HOLDINGS and its
     SUBSIDIARIES and the purchase price is not less than the fair market value
     of the asset sold or disposed of,

                                     -25-
<PAGE>
 
           (vi)    a sale or other disposition of accounts receivable
     arising in the ordinary course of business which are overdue and which
     HOLDINGS or any SUBSIDIARY have determined are not economical to collect,
     and

           (vii)   other dispositions, provided, that such dispositions do
                                       -------- 
     not exceed in the aggregate in any fiscal year ten percent (10%) of the
     book value of all assets.

     (b)   HOLDINGS further agrees that it shall not permit its SUBSIDIARIES to
authorize or issue additional shares of their capital stock or similar equity
interest except (i) shares or similar equity interests issued to HOLDINGS or a
wholly-owned SUBSIDIARY of HOLDINGS, (ii) shares of capital stock or equity
interests issued by (1) any non-wholly owned SUBSIDIARY to its holders of
capital stock or equity interests on a proportionate basis and (2) a newly
created SUBSIDIARY to another PERSON in connection with any joint venture,
provided that such newly created SUBSIDIARY's business and activities shall be
- --------
limited to the conduct of such joint venture, and (iii) for directors'
qualifying shares and similar issuances pursuant to local law requirements.

     SECTION  6.14  MERGERS.  HOLDINGS will not, and will not permit its
                    -------                                             
SUBSIDIARIES to, merge or consolidate with or into or purchase or otherwise
acquire all or substantially all of the assets of, or stock or other equity
interest in, any PERSON unless (a) after giving effect to such transaction
HOLDINGS shall be in compliance with the provisions of Section 6.19 and 6.20 and
                                                       ------------     ----    
(b) if such transaction involves an INDEMNITOR, the surviving entity shall have
executed and delivered to RELIANCE a SUPPLEMENTAL SIGNATURE PAGE; provided, that
                                                                  --------      
(x) any wholly-owned SUBSIDIARY which is an INDEMNITOR may merge or consolidate
into HOLDINGS or into or with any other wholly-owned SUBSIDIARY which is an
INDEMNITOR, (y) any wholly-owned SUBSIDIARY which is not an INDEMNITOR may merge
or consolidate into HOLDINGS or into or with any other wholly-owned SUBSIDIARY,
provided, that in the event an INDEMNITOR is a party to such merger or
- --------                                                              
consolidation, an INDEMNITOR must survive the transaction and (z) any wholly-
owned SUBSIDIARY may sell, transfer, convey, lease or assign its assets or a
substantial part thereof to HOLDINGS or any other wholly-owned SUBSIDIARY,
provided, that in the case of a sale, transfer, conveyance, lease or assignment
- --------                                                                       
by such a SUBSIDIARY which is an INDEMNITOR, the other party to such transaction
must also be an INDEMNITOR.  Notwithstanding the foregoing, HOLDINGS and its
SUBSIDIARIES may consummate the transactions contemplated by the MERGER
AGREEMENT.

     SECTION  6.15  INVESTMENTS.  HOLDINGS will not, and will not permit its
                    -----------                                             
SUBSIDIARIES to, make or suffer to exist any investment in any PERSON whether in
the form of equity, DEBT or CONTINGENT LIABILITY, except:

     (a)    Cash Equivalent Investments;

                                     -26-
<PAGE>
 
     (b)    investments permitted as DEBT or CONTINGENT LIABILITIES under
Section 6.12 and investments permitted under Section 6.14;
- ------------                                 ------------ 

     (c)    investments existing on the effective date of this Agreement and
disclosed in Schedule 6.15;
             ------------- 

     (d)    accounts receivable arising from, and credit extended in connection
with, the sale of goods or rendering of services in the ordinary course of
business and promissory notes or other instruments evidencing such credit or
partial satisfaction thereof;

     (e)    investments, DEBT and CONTINGENT LIABILITIES in HOLDINGS or its
SUBSIDIARIES; provided, that the aggregate amount of investments in LIMITED
              --------                                                     
SUBSIDIARIES, when added to the other RESTRICTED AMOUNTS then outstanding, shall
not exceed at any time $30,000,000;

     (f)    loans or advances to employees of HOLDINGS and its SUBSIDIARIES made
in the ordinary course of business consistent with past business practices;

     (g)    investments made in the ordinary course of business in connection
with its capacity as a co-joint venturer in a joint venture, corporation or
similar pooling of efforts in respect of a specific project or series of
projects for a limited or fixed duration to conduct a business of a type in
which a PRINCIPAL is presently engaged consistent with past practices;

     (h)    investments in Amboy Aggregates, a New Jersey joint venture,
existing on the date hereof and disclosed on Schedule 6.15 and additional
                                             -------------
investments therein made after the date hereof; provided, that the amount of
                                                --------
such additional investments (excluding increases solely as a result of increases
in the retained earnings of Amboy Aggregates) shall not exceed at any time
$10,000,000.

     (i)    other investments in an aggregate amount at any one time not to
exceed $15,000,000;

     For purposes of this Section 6.15, "Cash Equivalent Investments" means, at
                          ------------   ---------------------------           
any item:

     (a)    any obligation, maturing not more than one year after such time,
            issued or guaranteed by the United States Government or issued by an
            agency thereof and backed by the full faith and credit of the United
            States of America;

     (b)    marketable general obligations, maturing not more than six months
            after such time, issued by any state of the United States of America
            or any political subdivision of any such state or any public
            instrumentality thereof and rated A-2 or higher by Standard & Poor's

                                     -27-
<PAGE>
 
            Rating Group, a division of McGraw Hill Inc. or P-2 or higher by
            Moody's Investors Service, Inc.;

     (c)    commercial paper, maturing not more than nine months from the date
            of issue, which is issued by a corporation organized under the laws
            of any state of the United States or of the District of Columbia and
            rated A-2 or higher by Standard & Poor's Rating Group, a division of
            McGraw Hill Inc. or P-2 or higher by Moody's Investors Service,
            Inc.;

     (d)    any certificate of deposit, time or demand deposit or bankers
            acceptance, maturing not more than one year after such time, which
            is issued by a commercial banking institution organized under the
            laws of the United States of America or any State thereof or the
            District of Columbia that has a combined capital, surplus and
            undivided profits of not less than $100,000,000, or any Lender or
            commercial banking institution organized under the laws of the
            United Kingdom, Canada or Japan having combined capital, surplus and
            undivided profits of not less than $100,000,000;

     (e)    fully collateralized repurchase agreements with a term of not more
            than 30 days for underlying securities of the type described in
            clauses (a) and (b) above, entered into with any institution meeting
            -----------     ---
            the qualifications specified in clause (d) above;
                                            ----------       

     (f)    participations in loans made to a borrower with a debt rating of A-2
            or higher form Standard & Poor's Rating Group, a division of McGraw
            Hill Inc. or P-2 or higher from Moody's Investor Service, Inc.;
            provided, that such loans must mature within six months form the
            --------
            date such participation is purchased;

     (g)    short-term asset management accounts for the purpose of investing in
            notes issued by a corporation organized under the laws of any state
            of the United States or of the District of Columbia and rated A-2 or
            higher by Standard & Poor's Rating Group, a division of McGraw Hill
            Inc. or P-2 or higher by Moody's Investors Service, Inc.; or

     (h)    bonds issued by a municipality or governmental agency and rate not
            lower than (i) BBB by Standard & Poor's Corporation or (ii) Baa2 by
            Moody's Investors Service, Inc. and purchased by HOLDINGS or any of
            its SUBSIDIARIES in the ordinary course of its business in
            connection with retainage under contracts with its customers.

     SECTION  6.16  DIVIDEND RESTRICTIONS.  HOLDINGS will not pay any dividend
                    ---------------------                                     
or make any other distribution to any PERSON, except:

                                     -28-
<PAGE>
 
     (a)    dividends or distributions payable in common stock or warrants to
purchase common stock or splitups or reclassification of its stock into
additional or other shares of its common stock;

     (b)    cash dividends or other distributions payable by HOLDINGS not to
exceed in aggregate during the term of this Agreement the sum of (i) $5,000,000
plus (ii) fifty percent (50%) of the sum of the positive NET INCOME (if any) for
- ----
the fiscal quarter of HOLDINGS ending on or about December 31, 1998 plus (iii)
                                                                    ----
fifty percent (50%) of the sum of positive NET INCOME (if any) for each fiscal
year of HOLDINGS ending on or after December 31, 1999; provided, that both
                                                       --------
before and after giving effect to such dividends or distributions HOLDINGS shall
be in compliance with the provisions of Section 6.19 and 6.20; and
                                        ------------     ----     

     (c)    cash dividends or distributions made pursuant to (i) the MERGER
AGREEMENT (including, without limitations, dividends or distributions made after
the date of this Agreement pursuant to Sections 2.6 and 2.11 of the MERGER
                                       ------------     ----              
AGREEMENT) and (ii) the separate agreement entered into by HOLDINGS and certain
members of senior management of HOLDINGS with respect to the reimbursement of
taxes payable by such senior management in connection with the consummation of
the transactions contemplated by the MERGER AGREEMENT, provided, that in the
                                                       --------             
case of the foregoing clause (ii), such dividends and/or distributions shall not
exceed in aggregate $4,000,000.

     SECTION  6.17  RESTRICTIONS UPON CONTRACTS WITH AFFILIATES.  Other than
                    -------------------------------------------             
amongst themselves, HOLDINGS and its SUBSIDIARIES will not without the prior
written consent of RELIANCE enter into contracts, equipment leases or other
agreements with any AFFILIATE except on an arms' length basis or except (a)
pursuant to written agreements with third party PERSONS from which HOLDINGS and
its SUBSIDIARIES have been or are being benefitted, including but not limited to
pension plans and other joint employee benefit programs, insurance programs and
other similar joint programs or services, (b) the payment by HOLDINGS and its
SUBSIDIARIES to Vectura Holding Company LLC, or any of its AFFILIATES of out of
pocket costs and expenses owed to PERSONS who are not AFFILIATES and (c)
transactions contemplated by the MERGER AGREEMENT and the EQUITY DOCUMENTS.

     SECTION  6.18  NATURE OF BUSINESS.  HOLDINGS and its SUBSIDIARIES shall not
                    ------------------                                          
engage in any business activities or operations substantially different from or
unrelated to its present business activities and operations; provided, that
                                                             --------      
HOLDINGS and its SUBSIDIARIES may engage in activities that are reasonably
related or ancillary to its business activities or operations.

     SECTION  6.19  NET WORTH.  HOLDINGS and its consolidated SUBSIDIARIES shall
                    ---------                                                   
not permit NET WORTH as of the last day of any fiscal quarter of HOLDINGS ending
after the date hereof, to be less than the sum of (i) -56,100,000 plus (ii)
fifty percent (50%) of the 

                                     -29-
<PAGE>
 
sum of the positive NET INCOME (if any) for the fiscal quarter of HOLDINGS
ending on or about December 31, 1998, plus (iii) fifty percent (50%) of the sum
                                      ----
of the positive NET INCOME (if any) for each fiscal year of HOLDINGS ending on
or after December 31, 1999 and prior to the date of determination hereunder.

       SECTION  6.20  NET CURRENT ASSETS.   HOLDINGS will not permit the ratio
                      ------------------
of its consolidated current assets to its consolidated current liabilities as of
the last day of each fiscal quarter of HOLDINGS to be less than 1.4 to 1 and
will not permit its net current assets as of the last day of each fiscal quarter
of HOLDINGS to be less than $17,000,000; provided, that in the event HOLDINGS
                                         --------                            
fails to maintain either of these levels it shall immediately notify RELIANCE
and shall have thirty (30) days in which to restore its position.  In the
determination of current assets, pipe inventory shall be classified as a current
asset; and provided further, that for purposes of calculating consolidated
           -------- -------                                               
current liabilities, current maturities of DEBT will be excluded from the
calculation thereof to the extent HOLDINGS or any of its SUBSIDIARIES is able to
repay such current maturities through the incurrence of other non-current DEBT
(including, without limitation, through borrowings under the BANK LOAN
FACILITY).

       SECTION  6.21  SUBORDINATED DEBT AND PAYMENT BLOCKAGE
                      NOTICE.                                                 
                      --------------------------

       (a)  HOLDINGS shall not, and shall not suffer or permit any of its
SUBSIDIARIES to, (i) make any payment (other than any payment utilizing proceeds
from the issuance of any equity securities by HOLDINGS or any parent entity) of
interest on any SUBORDINATED DEBT on any day other than the stated, scheduled
date (subject to any applicable grace period) for such payment set forth in the
document or agreement evidencing or governing such SUBORDINATED DEBT, (ii)  make
any voluntary or mandatory prepayment (other than any payment utilizing proceeds
from the issuance of any equity securities by HOLDINGS or any parent entity) of
principal of, or redeem, purchase or defease, any SUBORDINATED DEBT, or (iii)
consent to any amendment, supplement or other modification of any of the terms
or provisions contained in, or applicable to, any document or agreement
evidencing or governing SUBORDINATED DEBT, except to the extent that such
amendment, supplement or other modification would extend the date or reduce the
amount of any required repayment or redemption or would amend, supplement or
modify any term or provision in a manner not adverse to the rights or interests
of RELIANCE.

       (b)  HOLDINGS shall promptly give notice in writing to RELIANCE of the
receipt by the Trustee under the 1998 DEBT INDENTURE of any PAYMENT BLOCKAGE
NOTICE.

                                     -30-
<PAGE>
 
                                  ARTICLE VII

                              RIGHTS OF RELIANCE
                                        
       SECTION  7.1   FURTHER ASSURANCES/RELIANCE AS ATTORNEY-IN-FACT.
                      -----------------------------------------------
PRINCIPALS agree to sign, execute, file and/or deliver to RELIANCE all
documents, reports, papers, pleadings and/or instruments reasonably requested by
RELIANCE to obtain, and/or perfect any of RELIANCE's rights under this
Agreement. The INDEMNITORS irrevocably nominate and appoint RELIANCE or any
other PERSON(s) designated by RELIANCE, effective upon the occurrence and during
the continuance of an EVENT OF DEFAULT, true and lawful attorney-in-fact of the
INDEMNITORS, with full right and authority, upon the occurrence and during the
continuance of an EVENT OF DEFAULT to execute on behalf of, and sign the names
of each INDEMNITOR to any voucher, release, satisfaction, check, application for
payment, bill of sale of any or all property assigned by this Agreement or any
other UNDERWRITING DOCUMENT to RELIANCE or any other paper or contract necessary
or desired to carry into effect the purposes of this Agreement or any other
UNDERWRITING DOCUMENT, with full right and authority, to satisfy the performance
of the CONTRACT(s); and each INDEMNITOR ratifies and confirms all that such
attorney-in-fact or RELIANCE may lawfully do in the premises and further
authorizes and empowers RELIANCE and such attorney-in-fact and each of them to
enter upon and take possession of the tools, plant, equipment, materials and
subcontracts and all other collateral security mentioned in this Agreement and
enforce, use, employ and dispose thereof for the purposes set forth in this
Agreement, INDEMNITORS recognize that the appointment of such attorney-in-fact
constitutes a power coupled with an interest.

       SECTION  7.2   CONTRACT FUNDS HELD IN TRUST.  INDEMNITORS and PRINCIPALS
                      ----------------------------                             
agree and expressly declare that upon the occurrence and during the continuance
of an EVENT OF DEFAULT all funds due or to become due under the CONTRACT(s) will
immediately become trust funds, whether in possession of INDEMNITORS, PRINCIPALS
or another, for the benefit and the payment of all PERSONS to whom a PRINCIPAL
incurs obligations in the performance of the CONTRACT(s), for which RELIANCE
would be liable under the BOND(s).  If RELIANCE discharges any such obligations,
with or without a claim asserted against RELIANCE under the BOND(s), it shall be
entitled to assert the right of such PERSON to the trust fund.

       SECTION  7.3   RIGHT OF RELIANCE TO SETTLE CLAIMS. RELIANCE shall have
                      ----------------------------------
the exclusive right for itself and for INDEMNITORS and PRINCIPALS to decide and
determine whether any claim, demand, suit or judgment on the BOND(s) shall be
paid, settled, defended or appealed. Any payment or determination made by
RELIANCE under a good faith belief that either RELIANCE was or might be liable
therefor or such payments were necessary or advisable to protect any of
RELIANCE's rights or to avoid or lessen RELIANCE's liability or alleged
liability, shall be final, conclusive and binding upon INDEMNITORS and the
PRINCIPALS; and any LOSS which may be sustained or incurred shall be paid by the
respective PRINCIPAL or by INDEMNITORS within fifteen (15) days of receipt of
written demand by RELIANCE. In the event of any payment, settlement, compromise,
or investigation, an itemized

                                     -31-
<PAGE>
 
statement of LOSS sworn to by an officer or authorized representative of
RELIANCE or voucher(s) or other evidence of such LOSS shall be prima facie
evidence of the fact and extent of the liability of INDEMNITORS and the
PRINCIPALS to RELIANCE in any claim or suit and in any and all matters arising
between INDEMNITORS, the PRINCIPALS and RELIANCE.

       SECTION  7.4   AUTHORITY OF RELIANCE TO MAKE LOANS TO PRINCIPAL.  In
                      ------------------------------------------------     
addition to the other remedies provided herein, RELIANCE is authorized and
empowered, but is not obligated, to advance or loan money or guarantee loans to
any PRINCIPAL as RELIANCE may see fit for the purpose of any of the CONTRACT(s),
or for the purpose of meeting operational expenses or paying other obligations,
bonded or unbonded.  Such funds may be advanced or guaranteed at anytime,
whether before or after default of such PRINCIPAL under the CONTRACT(s).  Upon
demand by RELIANCE, each INDEMNITOR shall be responsible to reimburse RELIANCE
for all funds so loaned, advanced, or guaranteed and all LOSS incurred by
RELIANCE in relation thereto, notwithstanding the failure of any PRINCIPAL to so
use those funds.  INDEMNITORS waive all notice of such advance, loan, or
guarantee.

       SECTION  7.5   AUTHORITY OF RELIANCE TO AMEND BOND. RELIANCE shall have
                      -----------------------------------
the right, and is hereby authorized and empowered, but not required: (a) upon
the request of any INDEMNITOR to increase or decrease the penalty or penalties
of any BOND(s), to change the OBLIGEE(s) therein, to execute any continuation,
enlargements, modifications and renewals thereof or substitute therefor with the
same or different conditions, provisions or OBLIGEE(s), and with the same,
larger or smaller penalties, it being agreed that this instrument shall apply to
and cover such new or changed BOND(s) or renewals even though the consent of
RELIANCE may or does substantially increase the liability of the INDEMNITORS and
the PRINCIPALS; or (b) to take such steps as it may deem necessary or proper to
obtain release from liability under the BOND(s); or (c) to assent to any changes
in any CONTRACT, including but not limited to, any change in the time for
completion of any CONTRACT and to payments or advances thereunder.

       SECTION  7.6   RIGHTS OF RELIANCE TO TAKE POSSESSION OF THE WORK. Upon
                      -------------------------------------------------
the occurrence and during the continuance of an EVENT OF DEFAULT (for the
avoidance of doubt, after giving effect to all applicable grace periods
contained in the definition of EVENT OF DEFAULT), in addition to other remedies
provided herein, RELIANCE is authorized and empowered, but is not obligated, to
take possession of the work under any CONTRACT(s) and at the expense of the
respective PRINCIPAL and of INDEMNITORS to complete or to contract for the
completion of the same, or to consent to the reletting of the completion thereof
by OBLIGEE, or to take such other steps as in the discretion of RELIANCE may be
advisable or necessary to obtain its release or to avoid LOSS.

       SECTION  7.7   DEPOSITORY TRUST ACCOUNTS.  Upon the occurrence and during
                      -------------------------                                 
the continuance of an EVENT OF DEFAULT (for the avoidance of doubt, after giving
effect to all applicable grace periods contained in the definition of EVENT OF
DEFAULT), PRINCIPALS shall, upon demand of RELIANCE, open an account(s) with a
bank or similar depository designated by PRINCIPALS and approved by RELIANCE,
which account(s) shall be 

                                     -32-
<PAGE>
 
designated as trust account(s) for the deposit of such trust funds, and shall
deposit therein all monies paid or to be paid under the CONTRACT(s). Withdrawals
from such account(s) shall be by check or similar instruments signed by a
representative of RELIANCE and, at RELIANCE's option, countersign by an
PRINCIPAL. Said trust(s) shall terminate on the payment by INDEMNITORS and
PRINCIPALS of all the contractual obligations for the payment of which the
trust(s) are created or upon the expiration of seven (7) years from the date
thereof, whichever shall first occur.

       SECTION  7.8   PRESERVATION OF RELIANCE'S RIGHTS.  RELIANCE shall have
                      ---------------------------------                      
every right and remedy which a personal surety without compensation would have,
including the right to secure its discharge from the suretyship, and nothing in
this Agreement shall waive, abridge or diminish any right which RELIANCE might
have if this Agreement were not executed.

       SECTION  7.9   AUTHORITY OF RELIANCE TO ELECT REMEDIES. Each right,
                      ---------------------------------------
remedy and power of RELIANCE provided in this Agreement or by law, equity, or
statute shall be cumulative, and the exercise by RELIANCE of any right, remedy
or power shall not preclude RELIANCE's simultaneous or subsequent exercise of
any or all other rights, powers or remedies. The failure or delay by RELIANCE to
exercise any right, power or remedy shall not waive any right, power or remedy.
No notice or demand upon RELIANCE by any INDEMNITOR or any PRINCIPAL shall limit
or impair RELIANCE's right to take any action under this Agreement or to
exercise any right, power or remedy, subject to the provisions of Section 3.5
                                                                  -----------
herein.                                                          
       

                                 ARTICLE  VIII

                                 MISCELLANEOUS
                                        
       SECTION  8.1   BENEFICIAL PARTIES. This Agreement shall, in all its terms
                      ------------------
and agreements, be for the benefit of and protect any PERSON joining with
RELIANCE in executing any BOND or BONDS or executing at the request of RELIANCE
said BOND or BONDS as well as any PERSON assuming co-suretyship or reinsurance
thereupon.

       SECTION  8.2   JOINT AND SEVERAL.  The agreements and covenants herein
                      -----------------                                      
contained shall be binding upon the undersigned, both jointly and severely, upon
their successors and assigns jointly and severely, provided, that the PRINCIPALS
                                                   --------                     
and the INDEMNITORS may not assign their rights hereunder without the prior
written consent of RELIANCE.

       SECTION  8.3   ATTORNEYS FEES.  The INDEMNITORS agree hereby to pay the
                      --------------                                          
reasonable attorneys fees and expenses incurred by RELIANCE in the preparation
and enforcement of this Agreement and the other UNDERWRITING DOCUMENTS.

       SECTION  8.4   APPLICABLE LAW. The terms and conditions of this Agreement
                      --------------
shall be construed under the laws of Pennsylvania.

                                     -33-
<PAGE>
 
       SECTION  8.5   JURISDICTION FOR SUITS UNDER THIS AGREEMENT. Separate
                      ------------------------------------------- 
suits may be brought hereunder as causes of action may accrue, and the pendency
or termination of any such suit shall not bar any action, whether previously or
subsequently arising. PRINCIPALS and INDEMNITORS consent to the jurisdiction of
the state and federal court located in Philadelphia, PA to bring any action
against them under this Agreement or the BOND(s). Each PRINCIPAL and each
INDEMNITOR are the agents for all PRINCIPALS and all INDEMNITORS for the purpose
of accepting service of process.

       SECTION  8.6   INDEMNITORS WAIVE DEFENSE OF SUBSEQUENT EXECUTION.
                      -------------------------------------------------  
INDEMNITORS waive any defense that this Agreement was executed subsequent to any
BOND, admitting that such BOND was executed pursuant to each INDEMNITOR'S
request and in reliance upon INDEMNITORS' promise to execute this Agreement.
           
       SECTION  8.7   VALIDITY OF AGREEMENT.  Failure to execute, or defective
                      ---------------------                                   
execution, by any party shall not affect the validity of this Agreement as to
any other party executing the same and each other party shall remain fully bound
and liable hereunder.  Invalidity of any portion or provision of this Agreement
by reason of the laws of any state or for any other reason shall not render the
other provisions or portions invalid.  Executions of any application or
submission for any BOND by any PRINCIPAL, or of any other indemnity agreement by
any INDEMNITOR for the PRINCIPALS shall not abrogate, waive or diminish any
rights of RELIANCE under this Agreement.  This Agreement may be executed
simultaneously in one or more counterparts, each of which shall be an original,
but all of which together shall constitute one and the same instrument.

       SECTION  8.8   ORAL MODIFICATIONS INEFFECTIVE.  This Agreement may not be
                      ------------------------------                            
changed or modified orally.  No change or modification to this Agreement shall
be effective unless specifically agreed to in writing and executed by RELIANCE
and HOLDINGS.

       SECTION  8.9   NOTICES. It is mutually agreed that any and all notices or
                      -------
demands herein provided for must be given in writing and shall be deemed given
if and when delivered in person or duly deposited in the United States mails,
postage prepaid for regular or certified mail, properly addressed to the party
to whom given at the address of such party shown in this Agreement; provided,
                                                                    -------- 
that any party may specify any other post office address in the United States by
giving at least ten (10) days written notice thereof to the other party.

Notice to RELIANCE shall be sent to:

      Reliance Insurance Company
      Three Parkway
      Philadelphia, PA  19102-1376

      Attention: Surety Department

                                     -34-
<PAGE>
 
Notice to any PRINCIPAL or to any INDEMNITOR shall be sent to:

      Great Lakes Dredge & Dock Corporation
      2122 York Road
      Oak Brook, IL  60523

      Attention:  Bruce J. Biemeck
                  Chief Financial Officer

With a copy to:

      Winston & Strawn
      35 W. Wacker Drive
      Chicago, Illinois  60601

      Attention:  Brian S. Hart, Esq.

     SECTION  8.10  REAFFIRMATION AND RESTATEMENT.  and restatement of the
                    -----------------------------                         
ORIGINAL AGREEMENT and the DEBT evidenced by the ORIGINAL AGREEMENT is
continuing DEBT.  Nothing herein shall be deemed to constitute a payment,
settlement or novation of the DEBT evidenced by the ORIGINAL AGREEMENT, or to
release or otherwise adversely affect any LIEN securing such DEBT or any rights
RELIANCE has against any guarantor, surety or other party primarily or
secondarily liable for such DEBT.

     SECTION  8.11  CONFIDENTIALITY.  RELIANCE agrees that they will maintain
                    ---------------                                          
the confidentiality of any written or oral information provided to RELIANCE by
or on behalf of HOLDINGS or any of its SUBSIDIARIES (hereinafter collectively
called "Confidential Information"), subject to RELIANCE'S (a) obligation to
        ------------------------                                           
disclose any such Confidential Information pursuant to a request or order under
applicable laws and regulations or pursuant to a subpoena or other legal
process, (b) right to disclose any such Confidential Information to its
examiners, auditors, counsel and other professional advisors, (c) right to
disclose any such Confidential Information in connection with any litigation or
dispute involving RELIANCE and HOLDINGS or any of its SUBSIDIARIES (d) right to
provide such information to other Persons for the purpose of procuring co-
suretyship or reinsurance if such Person agrees in writing to maintain the
confidentiality of such information on terms substantially similar to those of
this Section as if it were a party hereto.  Notwithstanding the foregoing, any
such information supplied to RELIANCE or another Person under this Agreement
shall cease to be Confidential Information if it is or becomes known to such
Person by other than unauthorized disclosure, or if it becomes a matter of
public knowledge.

     SECTION  8.12  RELEASE OF LIENS.  RELIANCE agrees to release the LIENS
                    ----------------                                       
under the SECURITY AGREEMENTS, the VESSEL MORTGAGES, and any other UNDERWRITING
DOCUMENTS, and to execute and deliver such documents and instruments requested
by any PRINCIPAL to effect such release;

                                     -35-
<PAGE>
 
     (a) on any property or assets in which the agent under the BANK LOAN
FACILITY has a first priority LIEN and if such first priority LIEN is released
by the agent under the BANK LOAN FACILITY;

     (b) on any property or assets for which substitute collateral is provided
with an appraisal value at least equal to the value of the property or assets
released;

     (c) on all collateral upon termination of this Agreement and payment in
full of all obligations under this Agreement; and

     (d) on any property or assets upon the sale, transfer or other disposition
of such property or assets which is otherwise permitted under this Agreement, up
to an aggregate fair market value, as determined in good faith by the applicable
PRINCIPAL selling such property or assets, not to exceed $5,000,000 during the
term of this Agreement; provided, that RELIANCE is given prior written notice of
                        --------                                                
the fair market value of such transaction.

IN WITNESS WHEREOF, this Agreement is executed by the parties on the day and
date first set forth above.

GREAT LAKES DREDGE & DOCK CORPORATION

BY:
   --------------------------------
   Its
      -----------------------------

GREAT LAKES INTERNATIONAL, INC.

BY:
   --------------------------------
   Its
      -----------------------------

GREAT LAKES DREDGE & DOCK COMPANY

BY:
   --------------------------------
   Its
      -----------------------------

LYDON DREDGING & CONSTRUCTION COMPANY, LTD.

BY:
   --------------------------------
   Its
      -----------------------------

                                     -36-
<PAGE>
 
GATES CONSTRUCTION CORPORATION

BY:
   --------------------------------
   Its
      -----------------------------

NATCO DREDGING LIMITED PARTNERSHIP

BY:
   --------------------------------
   Its
      -----------------------------

NORTH AMERICAN TRAILING COMPANY

BY:
   --------------------------------
   Its
      -----------------------------

FIFTY-THREE DREDGING COMPANY

BY:
   --------------------------------
   Its
      -----------------------------

DAWSON DREDGING COMPANY

BY:
   --------------------------------
   Its
      -----------------------------

                                     -37-
<PAGE>
 
     RELIANCE INSURANCE COMPANY

     UNITED PACIFIC INSURANCE COMPANY
     RELIANCE NATIONAL INSURANCE COMPANY
     RELIANCE SURETY COMPANY

BY:
   --------------------------------

   --------------------------------
   Its
      -----------------------------

                                     -38-

<PAGE>
 
                                                                   EXHIBIT 10.03

[LOGO]         [LETTERHEAD OF DEPARTMENT OF THE ARMY APPEARS HERE]

     REPLY TO
     ATTENTION OF

                                 May 18, 1998

Contracts Branch



Great Lakes Dredge & Dock Company
2122 York Road
Oak Brook, Illinois 60523

Gentlemen:


     You are hereby notified of the acceptance of your offer dated May 5, 1998, 
in the amount of $31,927,300.00, for the Base Bid and All Additive Bid Items, 
submitted in response to Solicitation No. DACW33-98-B-0004, for Boston Harbor 
Navigation Improvement and Berth Dredging Project.

     A fully-executed copy of Contract No. DACW33-98-C-0008 is enclosed for your
retention.

     In accordance with Contract Clause No. 65.1, CONTINUING CONTRACTS, 
funds in the amount of $12,000,000.00 have been reserved for this contract and 
are available for payments this fiscal year.

     Also enclosed, in duplicate, are Performance and Payment Bond forms.  In 
accordance with the Special Clause 1.8 of the Contract, properly executed bonds 
must be returned to this office within ten (10) calendar days after receipt of 
same.  Upon receipt of these properly executed forms, together with acceptable 
certificates of insurance as indicated in Special Clause 1.6 of the Contract, a 
Notice to Proceed will be issued.

     Building materials and supplies used in this contract are exempt from the 
Massachusetts Sale and Use Tax.  Certificate of Exemption No. E 999-089-600 
shall be cited by you in your Contractor's Exempt Purchase Certificate, Form 
ST-5C.

     Please sign the acknowledgement on the enclosed Designation of Authority 
and Notice of Appointment and return one copy to each of this office.





<PAGE>
 
     Enclosed for your information is a Notice regarding subcontracting 
assistance.

                                         Sincerely,
                                         
                                         /s/ Charles W. Coe

                                         Charles W. Coe      
                                         Chief, Contracting Division
                                         Contracting Officer

Enclosures
                                          

<PAGE>
 
<TABLE> 
<CAPTION> 
<S>                                     <C>                      <C>                           <C>                 <C>   
====================================================================================================================================
                                        1.   SOLICITATION NO.    2.   TYPE OF SOLICITATION     3.   DATE ISSUED    PAGE OF PAGES

SOLICITATION, OFFER,                          DACW33-98-B-0004                                        03/09/98          I   8
     AND AWARD                                                   [X] SEALED BID (IFB) 
Construction, Alteration, or Repair)                             [_] NEGOTIATED (RFP)
- ------------------------------------------------------------------------------------------------------------------------------------
IMPORTANT - The "offer" section on the reverse must be fully completed by offeror.
- ------------------------------------------------------------------------------------------------------------------------------------
4.   CONTRACT NO.                       5.   REQUISITION/PURCHASE REQUEST NO.        6.    PROJECT NO.
          DACW33-98-C-0008                        961316-8005-8002                                  DACW33-98-B-0004
- ------------------------------------------------------------------------------------------------------------------------------------
7.   ISSUED BY                      CODE          961316         8.   ADDRESS OFFER TO         BIDS
               DEPT OF THE ARMY                                                           USA ENGR DISTRICT, NEW ENGLAND
               NE DISTRICT, CORPS OF ENGINEERS                                            ATTN: BIDS REC'G DESK, CONTRACTING DIV
               696 VIRGINIA ROAD                                                          696 VIRGINIA ROAD
               CONCORD MA 01742-2751                                                      CONCORD MA 01742-2751



- ------------------------------------------------------------------------------------------------------------------------------------
9.   FOR INFORMATION          A.   NAME                               B.   TELEPHONE NO. (Include area code) (NO COLLECT CALLS)
          CALL                See Solicitation - SECTION 00100
- ------------------------------------------------------------------------------------------------------------------------------------
                                                           SOLICITATION
- ------------------------------------------------------------------------------------------------------------------------------------
NOTE: In sealed bid solicitations "offer" and "offeror" mean "bid" and "bidder".
- ------------------------------------------------------------------------------------------------------------------------------------
10.  THE GOVERNMENT REQUIRES PERFORMANCE OF THE WORK DESCRIBED IN THESE DOCUMENTS (Title, identifying no., date):

          SPECIFICATIONS titled "BOSTON HARBOR NAVIGATION AND BERTH
                                DREDGING PROJECT", dated MARCH 1998.

          DRAWINGS as listed in paragraph titled "CONTRACT DRAWINGS, MAPS AND
                                SPECIFICATIONS" of the SPECIAL CONTRACT REQUIREMENTS.

          CONTRACT CLAUSES, SECTION 00700 and 00800.




- ------------------------------------------------------------------------------------------------------------------------------------
11.  The Contractor shall begin performance within    *    ___________ calender days and complete it within   *   _________ calender
                                                   -------                                                  -----
days after receiving 

[_] award,     [X] notice to proceed. This performance period is   [X] mandatory,    [_] negotiable. *(See SECTION 00800 - Par. 1)
                                                                                                            ----------------------
- ------------------------------------------------------------------------------------------------------------------------------------
12A. THE CONTRACTOR MUST FURNISH ANY REQUIRED PERFORMANCE AND PAYMENT BONDS?               12B. CALENDAR DAYS
     (If "YES, Indicate within how many calendar days after award in Item 12B.)

[X] YES        [_] NO                                                                               010
- ------------------------------------------------------------------------------------------------------------------------------------
13.  ADDITIONAL SOLICITATION REQUIREMENTS:

A.   Sealed offers in original and 2 copies to perform the work required are due at the place specified in Item 8 by 1400 (hour)
                                   -                                                                                 ----
     local time 5/5/98 (date). If this is a sealed bid solicitation, offers must be publicly opened at that time. Sealed envelopes
     containing offers shall be marked to show the offeror's name and address, the solicitation number, and the date and time offers
     are due.

B.   An offer guarantee  [X] is,  [_] is not required.

C.   All offers are subject to the (1) work requirements, and (2) other provisions and clauses incorporated in the solicitation in
     full text or by reference.

     Offers providing less than     60    calender days for Government acceptance after the date offers are due will not be 
                                ---------
     considered and will be rejected.

====================================================================================================================================
</TABLE> 

                                    00010-1

<PAGE>
 
<TABLE> 
<CAPTION> 
<S>                                                          <C> 
====================================================================================================================================
- ------------------------------------------------------------------------------------------------------------------------------------
14.  NAME AND ADDRESS OF OFFEROR (Include Zip Code)            15. TELEPHONE NO. (Include area code)
                                                                            630/574-3000
                                                             -----------------------------------------------------------------------
  Great Lakes Dredge & Dock Company                            16. REMITTANCE ADDRESS (Include only if different than item 14)
  2122 York Road
  Oak Brook, Illinois  60523

DUNS:  00-693-0358      CAGE:  26052
- -------------------------------------------------------------
CODE  OCULI     FACILITY CODE
- ------------------------------------------------------------------------------------------------------------------------------------
17.  The offeror agrees to perform the work required at the prices specified below in strict accordance with the terms of this
     solicitation, if this offer is accepted by the Government in writing within _____ calendar days after the date offers are due.
     (Insert any number equal to or greater than the minimum requirement stated in Item 13D. Failure to Insert any number means the
     offeror accepts the minimum in item 13D.)

AMOUNTS>       See Page 3 - BIDDING SCHEDULE
- ------------------------------------------------------------------------------------------------------------------------------------
18.  THE OFFEROR AGREES TO FURNISH ANY REQUIRED PERFORMANCE AND PAYMENT BONDS.
- ------------------------------------------------------------------------------------------------------------------------------------
                                                  19.  ACKNOWLEDGMENT OF AMENDMENTS
                  (The offeror acknowledges receipt of amendments to the solicitation - give number and date of each)
- ------------------------------------------------------------------------------------------------------------------------------------
AMENDMENT NO.  0001      0002      0003      0004
- ------------------------------------------------------------------------------------------------------------------------------------
    DATE       3/11/98  4/7/98   4/10/98    4/21/98 
- ------------------------------------------------------------------------------------------------------------------------------------
20.  NAME AND TITLE OF PERSON AUTHORIZED TO SIGN OFFER         20B.  SIGNATURE                      20.C  OFFER DATE
     (Type or Print)     Steven F. O'Hara
                         Vice President                              /s/ Steven F. O'Hara                  5/5/98
- ------------------------------------------------------------------------------------------------------------------------------------
                                               AWARD (TO BE COMPLETED BY GOVERNMENT)    DACW33-98-C-0008
- ------------------------------------------------------------------------------------------------------------------------------------
21.  ITEMS ACCEPTED:

                      ITEM NOS. 0001 through 0020B as set forth on Pages Nos. 3 through 8, BIDDING SCHEDULE.



- ------------------------------------------------------------------------------------------------------------------------------------
22.  AMOUNT                                       23.  ACCOUNTING AND APPROPRIATION DATA
          $31,927,300.00 ESTIMATED                     SEE BIDDING SCHEDULE
- ------------------------------------------------------------------------------------------------------------------------------------
24.  SUBMIT INVOICES TO ADDRESS SHOWN IN          ITEM         25.  OTHER THAN FULL OPEN COMPETITION PURSUANT TO 
       (4 COPIES UNLESS OTHERWISE SPECIFIED)  >     SC-1.4
                                                                 [_] 10. U.S.C. 2304(c)(      )    [_] 41 U.S.C. 253(c)(       )
- ------------------------------------------------------------------------------------------------------------------------------------
26.  ADMINISTERED BY               CODE                        27.  PAYMENT WILL BE MADE BY
                                        -----------------------
     DEPARTMENT OF THE ARMY                                         FINANCE & ACCOUNTING OFFICER
     NEW ENGLAND DISTRICT, CORPS OF ENGINEERS                       U.S. ARMY ENGINEER DISTRICT, NEW ENGLAND
     Concord Park                                                   696 Virginia Road
     696 Virginia Road                                              Concord, MA  01742-2751
     Concord, MA  01742-2751 
- ------------------------------------------------------------------------------------------------------------------------------------
                                   CONTRACTING OFFICER WILL COMPLETE ITEM 28 OR 29 AS APPLICABLE
- ------------------------------------------------------------------------------------------------------------------------------------
[_] 28. NEGOTIATED AGREEMENT   (Contractor is required to sign     [X] 29. AWARD   (Contractor is not required to sign this 
this document and return________ copies to issuing office.)        document.) Your offer on this solicitation, is hereby accepted as
Contractor agrees to furnish and deliver all items or perform      to the items listed. This award consummates the contract, which
all work, requisitions Identified on this form and any             consists of (a) the Government solicitation and your offer, and
continuation sheets for the consideration stated in this           (b) this contract award. No further contractual document is 
contract. The rights and obligations of the parties to this        necessary.  
contract shall be governed by (a) this contract ward, (b) the 
solicitation, and (c) the clauses, representations, 
certifications, and specifications incorporated by reference 
in or attached to this contract. 

- ------------------------------------------------------------------------------------------------------------------------------------
30A. NAME AND TITLE OF CONTRACTOR OR PERSON AUTHORIZED             31A. NAME OF CONTRACTING OFFICER (Type or print)
     TO SIGN (Type or Print)                                            CHARLES W. COE
                                                                        Chief, Contracting Division
- ------------------------------------------------------------------------------------------------------------------------------------
30B. SIGNATURE                              30C. DATE              31B. UNITED STATES OF AMERICA                   31C. AWARD   
                                                                                                                        DATE
                                                                   BY   /s/ Charles W. Coe                            5/18/98
====================================================================================================================================
</TABLE> 
                                            STANDARDS FORM 1442 BACK (REV. 4-85)

                                    00010-2

<PAGE>
 
 
                                 SECTION 00010

                               BIDDING SCHEDULE

<TABLE> 
<CAPTION> 
ITEM                     DESCRIPTION                                        QUANTITY      U/I     UNIT PRICE        AMOUNT
- -----    -------------------------------------------------------            --------      ---    -------------   ------------
<S>      <C>                                                                <C>           <C>    <C>             <C> 
0001     MOBILIZATION AND DEMOBILIZATION FOR                                   1.00        JB          0.00000            0.00
         DREDGING OPERATIONS                                       
           Accounting: N/A                                         
                                                                   
0001A    MOBILIZATION AND DEMOBILIZATION FOR                                   1.00        JB    651519.000000      615,519.00
         DREDGING OPERATION - (O&M FEDERAL)                        
           Accounting: 96X3123 08-2418 001960  96190  3200 001TKQ   
                                                                   
0001B    MOBILIZATION AND DEMOBILIZATION FOR                                   1.00        JB    996595.000000      996,595.00
         DREDGING OPERATIONS - (FEDERAL)                           
           Accounting: 96X3122 08-2418 039025 96190 3200 001TKD    
                                                                   
0001C    MOBILIZATION AND DEMOBILIZATION FOR                                   1.00        JB    332198.000000      332,198.00
         DREDGING OPERATIONS - (NON-FEDERAL)                       
           Accounting: 96X8862 08-2418 039025 96190 3200 001TKB   
                                                                   
0001D    MOBILIZATION AND DEMOBILIZATION FOR                                   1.00        JB    294688.000000      294,688.00
         DREDGING OPERATIONS - (BERTHS)                            
           Accounting: 96X8862 08-2418 039025 96190 3200 001TKC    
                                                                   
0002     MOBILIZATION AND DEMOBILIZATION FOR                                   1.00        JB         0.000000            0.00
         DREDGING OPERATIONS                                        
           Accounting: N/A                                         
                                                                   
0002A    MOBILIZATION AND DEMOBILIZATION FOR                                   1.00        JB    168750.000000      168,750.00
         BLASTING OPERATIONS - (FEDERAL)                           
           Accounting: 96X3123 08-2418 039025 96190 3200 001TKD    
                                                                   
0002B    MOBILIZATION AND DEMOBILIZATION FOR                                   1.00        JB     56250.000000       56,250.00
         BLASTING OPERATIONS - (NON-FEDERAL)
           Accounting: 96x8862 08-2418 039025 96190  3200 001TKB

0003     MAINTENANCE DREDGING AND DISPOSAL                               612,000.00        CY *      23.000000   14,076,000.00
         (O&M FEDERAL)
            Accounting: 96X3123 08-2418 001960 3200 001TKQ
</TABLE> 

                                    00010-3
<PAGE>
 
<TABLE> 
<CAPTION> 
ITEM                 DESCRIPTION                     QUANTITY             U/I            UNIT PRICE                AMOUNT
- ------    ---------------------------------    ---------------------    -------    ---------------------    --------------------
<S>       <C>                                  <C>                      <C>        <C>                      <C> 
0004      IMPROVEMENT DREDGING AND DISPOSAL         1,230,000.00         CY **            0.000000                      0.00
           Accounting: N/A

0004A     IMPROVEMENT DREDGING AND DISPOSAL -         922,500.00         CY **            7.000000              6,457,500.00 
          (FEDERAL)
           Accounting: 96X3122 08-2418 039025 96190 3200 001TKD

0004B     IMPROVEMENT DREDGING AND DISPOSAL -         307,500.00         CY **            7.000000              2,152,500.00 
          (NON-FEDERAL)
           Accounting: 96X8862 08-2418 039025 96190 3200 001TKB 

0005      ROCK EXCAVATION FROM FEDERAL CHANNEL         16,900.00        CY ***            0.000000                      0.00
           Accounting: N/A

0005A     ROCK EXCAVATION FROM FEDERAL CHANNEL -       12,675.00        CY ***           55.000000                697,125.00
          (FEDERAL) 
           Accounting: 96X3122 08-2418 039025 96190 3200 001TKD 

0005B     ROCK EXCAVATION FROM FEDERAL CHANNEL -        4,225.00        CY ***           55.000000                232,375.00
          (NON-FEDERAL) 
           Accounting: 96X8862 08-2418 039025 96190 3200 001TKB  

0006      DEBRIS REMOVAL - (O&M FEDERAL)                  100.00        TN              150.000000                 15,000.00
           Accounting: 96X3123 08-2418 001960 96190 3200 001TKQ  

0007      REMOVAL AND DISPOSAL OF OBSTRUCTION               1.00        JB            25000.000000                 25,000.00
          (O&M FEDERAL)
           Accounting: 96X3123 08-2418 001960 96190 3200 001TKQ  

0008      WATER QUALITY MONITORING - (O&M FEDERAL)          1.00        JB           250000.000000                250,000.00
           Accounting: 96X3123 08-2418 039025 96190 3200 001TKQ

0009      REMOVAL OF ABANDONED WATER TUNNEL                 1.00        JB           350000.000000                350,000.00
</TABLE> 

                                    00010-4

<PAGE>
 
<TABLE> 
<CAPTION> 
ITEM                 DESCRIPTION                     QUANTITY             U/I            UNIT PRICE                AMOUNT
- ------    ---------------------------------    ---------------------    -------    ---------------------    --------------------
<S>       <C>                                  <C>                      <C>        <C>                      <C> 
          (NON-FEDERAL)
           Accounting: 96X8862 08-2418 039025 96190 3200 001TKB

0010      BOND COSTS                                        1.00         JB               0.000000                      0.00
           Accounting: N/A

0010A     BOND COST - (O&M FEDERAL)                         1.00         JB           42900.000000                 42,900.00 
           Accounting: 96X3123 08-2418 001960 96190 3200 001TKQ

0010B     BOND COST - (FEDERAL)                             1.00         JB           67700.000000                 67,700.00 
           Accounting: 96X3122 08-2418 039025 96190 3200 001TKD 

0010C     BOND COST - (NON-FEDERAL)                         1.00         JB           39400.000000                 39,400.00 
           Accounting: 96X8862 08-2418 039025 96190 3200 001TXB

0011      DREDGING OF DISTRIGAS BERTH AREA                  1.00         JB               0.000000                      0.00
          Accounting: N/A

0011A     MAINTENANCE DREDGING AND DISPOSAL             6,900.00         CY              21.000000                144,900.00
           Accounting: 96X8862 08-2418 039025 96190 3200 001TKC  

0011B     IMPROVEMENT DREDGING AND DISPOSAL            16,100.00         CY               7.000000                112,700.00
          (INCLUDES 6,100 CY OF OVERDEPTH)
           Accounting: 96X8862 08-2418 039025 96190 3200 001TKC  

0012      DREDGING OF PROLERIZED BERTH AREA                 1.00         JB               0.000000                      0.00
           Accounting: N/A

0012A     MAINTENANCE DREDGING AND DISPOSAL             5,400.00         CY              21.000000                113,400.00
           Accounting: 96X8862 08-2418 039025 96190 3200 001TKC

0012B     IMPROVEMENT DREDGING AND DISPOSAL            13,400.00         CY               7.000000                 93,800.00
          (INCLUDES 5,900 CY OF OVERDEPTH)
</TABLE> 

                                    00010-5

<PAGE> 

<TABLE> 
<CAPTION> 
ITEM                DESCRIPTION                        QUANTITY              U/I            UNIT PRICE               AMOUNT
- -----               -----------                        --------              ---            ----------               ------
<S>                 <C>                                <C>                   <C>            <C>                      <C> 
                    Accounting: 96X8862 08-2418
                    039025 96190 3200 001 TKC

0013                DREDGING OF MORAN BERTH AREA           1.00               JB                0.000000                 0.00
                    Accounting: N/A                                                                     
                                                                                                        
0013A               MAINTENANCE DREDGING AND           2,400.00               CY               21.000000            50,400.00
                    DISPOSAL                                                                            
                    Accounting: 96X8862 08-2418                                                         
                    039025 96190 3200 001TKC                                                            
                                                                                                        
0013B               IMPROVEMENT DREDGING AND           5,500.00               CY                7.000000            38,500.00 
                    DISPOSAL                                                                            
                    (INCLUDING 4,600 CY OF                                                              
                     OVERDEPTH)                                                                         
                    Accounting 96X8862 08-2418                                                          
                    039025 96190 3200 001TKC                                                            
                                                                                                        
0014                DREDGING OF MEDFORD STREET             1.00               JB                0.000000                 0.00
                    TERMINAL                                                  
                    BERTH AREA                                                
                    Accounting: N/A                                           
                                                                              
0014A               MAINTENANCE DREDGING AND          14,600.00               CY               21.000000           306,600.00 
                    DISPOSAL                                                  
                    Accounting: 96X8862 08-2418                               
                    039025 96190 3200 001TKC                                  
                                                                              
0014B               IMPROVEMENT DREDGING AND          23,000.00               CY                7.000000           161,000.00
                    DISPOSAL                                                  
                    (INCLUDES 9100 CY OF                                      
                     OVERDEPTH)                                               
                    Accounting: 96X8862 08-2418                               
                    039025 96190 3200 001TKC                                  
                                                                              
0015                DREDGING OR ARMY BASE 4-10             1.00               JB                0.000000                 0.00
                    BERTH AREAS                                               
                    Accounting N/A                                            
                                                                              
0015A               MAINTENANCE DREDGING AND          26,400.00               CY               26.000000           686,400.00
                    DISPOSAL                                                  
                    (INCLUDES 9800 CY OF                                      
                     OVERDEPTH)                                               
                    Accounting: 96X8862 08-2418                               
                    039025 96190 3200 001TKC                                  
                                                                              
0015B               IMPROVEMENT DREDGING AND           5,700.00               CY               10.000000            57,000.00 
                    DISPOSAL                                                  
                    (INCLUDES 5700 CY OF                                      
                     OVERDEPTH)                                               
                    Accounting: 96X8862 08-2418                               
                    039025 96190 3200 001TKC                                  
                                                                              
0016                DREDGING OF NORTH JETTY                1.00               JB                0.000000                 0.00
                    BERTH AREAS
</TABLE> 

                                    00010-6

<PAGE>
 
<TABLE> 
<CAPTION> 
ITEM                       DESCRIPTION                                 QUANTITY        U/I        UNIT PRICE          AMOUNT
- ----     -------------------------------------------------------      -----------     -----       ----------        -----------
<S>      <C>                                                          <C>             <C>         <C>               <C> 
         Accounting: N/A
 
0016A    MAINTENANCE DREDGING AND DISPOSAL                               13,30.00        CY        26.000000         345,800.00
         (INCLUDES 6,600 CY OF OVERDEPTH)                         
            Accounting: 96X8862 08-2418 039025 96190 3200 001TKC 
                                                                 
0017     DREDGING OF CONLEY TERMINAL BERTH AREAS                             1.00        JB         0.000000               0.00
         14, 15, 16, AND 17                                       
            Accounting: N/A                                      
                                                                 
0017A    MAINTENANCE DREDGING AND DISPOSAL                              21,400.00        CY        26.000000         556,400.00
         (INCLUDES 2300 CY OF OVERDEPTH)                         
            Accounting: 96x8862 08-2418 039025 96190 3200 001TKC         
                                                                 
0017B    IMPROVEMENT DREDGING AND DISPOSAL                              17,100.00        CY        10.000000         171,000.00
         (INCLUDES 9800 CY OF OVERDEPTH)                         
            Accounting: 96X8862 08-2418 039025 96190 3200 001TKC       
                                                                 
0018     DREDGING OF MYSTIC PIERS 1 AND 2 BERTH                              1.00        JB         0.000000               0.00
         AREAS                                                   
            Accounting: N/A                                       
                                                                 
0018A    MAINTENANCE DREDGING AND DISPOSAL                              20,600.00        CY        21.000000         432,600.00
         (INCLUDES 6600 CY OF OVERDEPTH)                         
            Accounting: 96X8862 08-2418 039025 96190 3200 001TKC 
                                                                 
0018B    IMPROVEMENT DREDGING AND DISPOSAL                               6,300.00        CY         7.000000          44,100.00
         (INCLUDES 6300 CY OF OVERDRAFT)                         
            Accounting: 96X8862 08-2418 039025 96190 3200 001TKC 
                                                                 
0019     DREDGING OF ARMY BASE 1-3 BERTH AREAS                               1.00        JB         0.000000               0.00
            Accounting: N/A                                       
                                                                 
0019A    MAINTENANCE DREDGING AND DISPOSAL                              31,100.00        CY        26.000000         808,600.00
</TABLE> 

                                    00010-7

<PAGE>
 
<TABLE> 
<CAPTION>  
ITEM                  DESCRIPTION                           QUANTITY       U/I             UNIT PRICE               AMOUNT
- ----      ------------------------------------------      -----------      ---       ---------------------    ------------------
<S>       <C>                                             <C>              <C>       <C>                      <C>   
          (INCLUDES 8,600 C.Y. OF OVERDEPTH)          
            Accounting: 96x8862 08-2418 039025 96190   
             3200 001TKC

0019B     IMPROVEMENT DREDGING AND DISPOSAL                4,600.00        CY             10.000000                46,000.00 
          (INCLUDES 4600 CY OF OVERDEPTH)
            Accounting: 96x8862 08-2418 039025 96190           
             3200 001TKC
               
0020      DREDGING OF MYSTIC PIERS 49 AND 50 BERTH             1.00        JB              0.000000                     0.00  
          AREAS
            Accounting: N/A   

0020A     MAINTENANCE DREDGING AND DISPOSAL               39,500.00        CY             21.000000               829,500.00 
          (INCLUDES 2700 CY OF OVERDEPTH)
            Accounting: 96x8862 08-2418 039025 96190   
             3200 001TKC

0020B     IMPROVEMENT DREDGING AND DISPOSAL                3,300.00        CY              7.000000                23,100.00
          (INCLUDES 3300 CY OF OVERDEPTH)
            Accounting: 96x8862 08-2418 039025 96190
             3200 001TKC  
</TABLE> 

              * Includes 101,100 cubic yards of allowable overdepth. 

              ** Includes 627,600 cubic yards of allowable overdepth.

              *** Includes 5,100 cubic yards of required overdepth and 5,100 
              cubic yards of allowable overdepth.
 
                                    00010-8
<PAGE>
 

________________________________________________________________________________


[LOGO OF US ARMY CORPS OF ENGINEERS NEW ENGLAND DISTRICT        DACW33-98-B-0004
APPEARS HERE]


________________________________________________________________________________


BOSTON HARBOR
NAVIGATION IMPROVEMENT AND
BERTH DREDGING PROJECT




BOSTON, MASSACHUSETTS





CONSTRUCTION SOLICITATION
AND SPECIFICATIONS




MARCH 1998
________________________________________________________________________________
<PAGE>
 
<TABLE> 
<S>                                   <C>                     
============================================================================================================================
                                      1. SOLICITATION NO.     2. TYPE OF SOLICIATION     3. DATE ISSUED     PAGE OF PAGES
        SOLICITATION, OFFER,                DACW33-98-B-0004                                                             
           AND AWARD                                          [X] SEALED BID (IFB)           03/09/98       1         8  
(Construction, Alteration, or Repair)                         [_] NEGOTIATED (RFP) 
- ----------------------------------------------------------------------------------------------------------------------------
IMPORTANT - The "offer" section on the reverse must be fully completed by offeror.
- ----------------------------------------------------------------------------------------------------------------------------
4. CONTRACT NO.                       5. REQUISITION/PURCHASE REQUEST NO.          6. PROJECT NO.
                                             961316-8005-8002                                 DACW33-98-B-0004
- ----------------------------------------------------------------------------------------------------------------------------
7. ISSUED BY                    CODE         961316               8. ADDRESS OFFER TO
                                     ---------------------------- 
                                                                                              BIDS
             DEPT OF THE ARMY                                                    USA ENGR DISTRICT, NEW ENGLAND      
             NE DISTRICT, CORPS OF ENGINEERS                                     ATTN: BIDS REC'G DESK, CONTRACTING DIV
             696 VIRGINIA ROAD                                                   696 VIRGINIA ROAD 
             CONCORD MA 01742-2751                                               CONCARD MA 01742-2751

- ----------------------------------------------------------------------------------------------------------------------------
9. FOR INFORMATION         A. NAME                                B. TELEPHONE NO. (Include area code)  (NO COLLECT CALLS)
      CALL:                See Solicitation - SECTION 00100
- ---------------------------------------------------------------------------------------------------------------------------- 
                                                  SOLICITATION
- ---------------------------------------------------------------------------------------------------------------------------- 
NOTE: In sealed bid solicitations "offer" and "offeror" means "bid" and "bidder".
- ---------------------------------------------------------------------------------------------------------------------------- 
10. THE GOVERNMENT REQUIRES PERFORMANCE OF THE WORK DESCRIBED IN THESE DOCUMENTS (Title, identifying no., date):

     SPECIFICATIONS titled "BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH
                           DREDGING PROJECT", dated MARCH 1998.

     DRAWINGS as listed in paragraph titled "CONTRACT DRAWINGS, MAPS AND
                           SPECIFICATIONS" of the SPECIAL CONTRACT REQUIREMENTS.

     CONTRACT CLAUSES, SECTION 00700 and 00800.



- ---------------------------------------------------------------------------------------------------------------------------- 
                                                      *                                                 *
11. The Contractor shall begin performance within -------- ------ calendar days and complete it within ------- -------
    calendar days after receiving    [_] award,     [x] notice to proceed.  This performance period is      [x] mandatory,   
[_] negotiable.  *(See SECTION 00800 - Par. 1)
                       ----------------------
- ---------------------------------------------------------------------------------------------------------------------------- 
12A. THE CONTRACTOR MUST FURNISH ANY REQUIRED PERFORMANCE AND PAYMENT BONDS?                        12B. CALENDAR DAYS
     (If "YES," indicate within how many calendar days after award in item 12B.)                                 
 [x] YES       [_] NO                                                                                           010
- ----------------------------------------------------------------------------------------------------------------------------
13. ADDITIONAL SOLICITATION REQUIREMENTS:
</TABLE> 


A. Sealed offers in original and 2 copies to perform the work required are due
   at the place specified in Item 8 by 1400 (hour) local time 04/20/98 (date).
   If this is a sealed bid solicitation, offers must be publicly opened at that
   time. Sealed envelopes containing offers shall be marked to show the
   offeror's name and address, the solicitation number, and the date and time
   offers are due.

B. An offer guarantee  [X] is,   [_] is not required.

C. All offers are subject to the (1) work requirements, and (2) other provisions
   and clauses incorporated in the solicitation in full text or by reference.

D. Offers providing less than 60 calendar days for Government acceptance after
   the date offers are due will not be considered and will be rejected.

================================================================================

                                    00010-1
<PAGE>
 
<TABLE> 
<S>                        <C>                                  <C>    
==================================================================================================================================
- ----------------------------------------------------------------------------------------------------------------------------------
  14. NAME AND ADDRESS OF OFFEROR(Include ZIP Code)              15. TELEPHONE NO. (Include area code)
                                                               -------------------------------------------------------------------  
                                                                 16. REMITTANCE ADDRESS (Include only if different than item 14)
                                                            
  DUNS:                                    CAGE:
- --------------------------------------------------------
  CODE                       FACILTY CODE
- --------------------------------------------------------

  17.   THE OFFEROR AGREES TO PERFORM THE WORK REQUIRED AT THE PRICES SPECIFIED
        BELOW IN STRICT ACCORDANCE WITHT HE TERMS OF THIS SOLICITAION,. IF THIS
        OFFER IS ACCEPTED BY THE GOVERNMENT IN WRITING WITHIN ---CALENDAR DAYS
        AFTER THE DATE OFFERS ARE DUE. (INSERT ANY NUMBER EQUAL TO OR GREATER
        THAN THE MINIMUM REQUIREMENT STATED IN ITEM 13D. FAILURED TO INSERT ANY
        NUMBER MEANS THE OFFEROR ACCEPTS THE MINIMUM IN ITEM 13D.)

AMOUNTS        SEE PAGE 3 - BIDDING SECHEDULE

- ----------------------------------------------------------------------------------------------------------------------------------- 
  18. THE OFFEROR AGGREES TO FURNISH ANY REQUIRED PERFORMANCE AND PAYMENT BONDS.
- -----------------------------------------------------------------------------------------------------------------------------------

  19. ACKNOWLEDGEMENT OF AMENDMENTS
(The offeror acknowledges receipt of amendments to the solicitation - give number and date of each)

- -----------------------------------------------------------------------------------------------------------------------------------
AMENDMENT NO.
- -----------------------------------------------------------------------------------------------------------------------------------
DATE
- -----------------------------------------------------------------------------------------------------------------------------------
  20.A NAME LAND TITLE OF PERSON AUTHORIZED TO SIGN OFFER            20.B. SIGNATURE                 20.C OFFER DATE
       (Type or print)     
- -----------------------------------------------------------------------------------------------------------------------------------
                                               AWARD (TO BE COMPLETED BY GOVERNMENT)
- -----------------------------------------------------------------------------------------------------------------------------------
  21. ITEMS ACCEPTED: 



- -----------------------------------------------------------------------------------------------------------------------------------
  22. AMOUNT                                            23. ACCOUNTING AND APPROPRIATION DATA   
- -----------------------------------------------------------------------------------------------------------------------------------
  24. SUBMIT INVOICES TO ADDRESS SHOWN IN              ITEM          25. OTEHR THAN FULL AND OPEN COMPETITION PURSUANT TO
     (4 COPIES UNLESS OTHERWISE SPECIFIED)             [_] 10 U.S.C 2304 (c)  (   )         [_] 41 U.S.C.253(c) (   ) 
- -----------------------------------------------------------------------------------------------------------------------------------
  26. ADMINISTERED BY         CODE __________________________        27. PAYMENT WILL BE MADE BY 

- ----------------------------------------------------------------------------------------------------------------------------------
                                   CONTRACTING OFFICER WILL COMPLETE ITEM 28 OR 29 AS APPLICABLE
- ----------------------------------------------------------------------------------------------------------------------------------

  [_] 28. NEGOTIATED AGREEMNET [CONRACTOR IS REQUIRED TO SIGN THIS DOCUMENT AND
  RETURN_________COPIES TO ISSUING OFFICE.) CONTRACTOR AGREES TO FURNISH AND
  DELIVER ALL ITEMS OR PERFORM ALL WORK, REQUISITIONS INDENTIFIED ON THIS FORM
  AND ANY CONTIMATIONS SHEETS FOR THE CONSIDERATION STATED IN THIS CONTRACT. THE
  RIGHTS AND OBLIGATIONS OF THE PARTIES TO THIS CONTRACT SHALL BE GOVERNED BY
  (A) THIS CONTRACT AWARD,(B) THE SOLICITATION, AND (C) THE CLAUSES,
  REPRESENTATIONS, CERTIFICATIONS, AND SPECIFICATIONS INCORPORATED BY REFERENCES
  IN OR ATTACHED TO THIS CONTRACT.

  [29] 29. AWARD (CONTRACTOR IS NOT REQUIRED TO SIGN THIS DOCUMENT). YOUR OFFER
  ON THIS SOLICITATION, IS HEREBY ACCEPTED AS TO THE ITEMS LISTED. THIS AWARD
  CONSUMMATES THE CONTRACT, WHICH CONSISTS OF (A) THE GOVERNMENT SOLICITATION
  AND YOUR OFFER, AND (B) THIS CONTRACT AWARD. NO FURTHER CONTRACTUAL DOCUMENT
  IS NECESSARY.

- ------------------------------------------------------------------------------------------------------------------------------------
 30A. NAME AND TITLE OF CONTRACTOR OR PERSON AUTHORIZED               31A. NAME OF CONTRACTING OFFICER (type or print)
      TO SIGN (Type or print)

- ------------------------------------------------------------------------------------------------------------------------------------
 30B. SIGNATURE                          30C. DATE                    31B. UNITED STATES OF AMERICA      31C. AWARD DATE

                                                                      BY   
===================================================================================================================================
                                                                                                 STANDARD FORM 1442 BACK (REV. 4-85)
</TABLE> 

                                    00010-2

<PAGE>
 
                                               Solicitation No. DACW33-98-B-0004

                               BIDDING SCHEDULE
                               ----------------

               Refer to Section 01025 - MEASUREMENT AND PAYMENT

                                BASE BID ITEMS
                                --------------

                        DREDGING BOSTON HARBOR CHANNELS
                        -------------------------------

<TABLE> 
<CAPTION> 
Item                                                        Estimated                  Unit           Estimated
No.       Description                                       Quantity         Unit      Price          Amount
- ------------------------------------------------------------------------------------------------------------
<S>       <C>                                               <C>              <C>       <C>            <C> 
0001      Mobilization and
          Demobilization for
          Dredging Operations                                    1           Job       L.S.           $________ 

0002      Mobilization and 
          Demobilization for
          Blasting Operations                                    1           Job       L.S.           $________  

0003      Maintenance Dredging 
          and Disposal                                       612,000*        C.Y.      $________      $________   

0004      Improvement Dredging
          and Disposal                                     1,230,000**       C.Y.      $________      $________    

0005      Rock Excavation from
          Federal Channel                                     16,900***      C.Y.      $________      $________     

0006      Debris Removal                                         100         Ton       $________      $________      

0007      Removal and Disposal of
          Obstruction                                            1           Job       L.S.           $________       

0008      Water Quality                                                    
          Monitoring                                             1           Job       L.S.           $________

0009      Removal of Abandoned
          Water Tunnel                                           1           Job       L.S.           $________       

0010      Bond Costs (Bond Costs shall
          include the cost of Bid,
          Performance, and Payment
          Bonds) (See Section 00700, 
          Contract Clauses, clause
          entitled "Notice of Evaluation
          Preference for Small Disadvantaged
          Business Concerns -- Construction
          Acquisitions -- Test Program
          (Apr 1996)")                                           1           Job       L.S.           $________       
                    
                                 TOTAL ESTIMATED BASE BID                                             $========
</TABLE> 

*    Includes 101,000 cubic yards of allowable overdepth.

**   Includes 627,600 cubic yards of allowable overdepth.

***  Includes 5,100 cubic yards of required overdepth and 5,100 cubic yards of 
allowable overdepth.

                                    00010-3

<PAGE>
 
                              ADDITIVE BID ITEMS
                              ------------------

                            DREDGING AT BERTH AREAS
                            -----------------------

<TABLE> 
<CAPTION> 
Item                                  Estimated                     Unit        Estimated
No.       Description                 Quantity       Unit           Price       Amount
- ----------------------------------------------------------------------------------------------
<S>       <C>                         <C>            <C>         <C>            <C> 
0011      Dredging of Distrigas
          Berth Area

0011A     Maintenance Dredging
          and Disposal                   6,900         C.Y.      $___________   $_____________

0011B     Improvement Dredging
          and Disposal (Includes
          6,100 C.Y. of overdepth)      16,100         C.Y.      $___________   $_____________

                               ESTIMATED TOTAL FOR ADDITIVE BID ITEM NO. 0011   $
                                                                                 =============

0012      Dredging of Prolerized
          Berth Area

0012A     Maintenance Dredging
          and Disposal                   5,400         C.Y.      $___________   $_____________

0012B     Improvement Dredging
          and Disposal (Includes
          5,900 C.Y. of overdepth)      13,400         C.Y.      $___________   $_____________

                               ESTIMATED TOTAL FOR ADDITIVE BID ITEM NO. 0012   $
                                                                                 =============

0013      Dredging of Moran
          Berth Area

0013A     Maintenance Dredging
          and Disposal                   2,400         C.Y.      $___________   $_____________

0013B     Improvement Dredging
          and Disposal (Includes
          4,600 C.Y. of overdepth)       5,500         C.Y.      $___________   $_____________

                               ESTIMATED TOTAL FOR ADDITIVE BID ITEM NO. 0013   $
                                                                                 =============

0014      Dredging of Medford Street
          Terminal Berth Area

0014A     Maintenance Dredging
          and Disposal                  14,600         C.Y.      $___________   $_____________

0014B     Improvement Dredging
          and Disposal (Includes
          9,100 C.Y. of overdepth)      23,000         C.Y.      $___________   $_____________

                               ESTIMATED TOTAL FOR ADDITIVE BID ITEM NO. 0014   $
                                                                                 =============
</TABLE> 

                                    00010-4
<PAGE>
 
Item                                 Estimated              Unit      Estimated
No.    Description                   Quantity     Unit      Price       Amount
- --------------------------------------------------------------------------------

0015   Dredging of Army Base 4-10    
       Berth Areas       

0015A  Maintenance Dredging
       and Disposal (Includes
       9,800 C.Y. of overdepth)       26,400      C.Y.      $____       $____

0015B  Improvement Dredging
       and Disposal (Includes
       5,700 C.Y. of overdepth)        5,700      C.Y.      $____       $____

                        ESTIMATED TOTAL FOR ADDITIVE BID ITEM NO. 0015  $====

0016   Dredging of North Jetty
       Berth Area 

0016A  Maintenance Dredging
       and Disposal (includes
       6,600 C.Y. of overdepth)       13,300      C.Y.      $____       $____

                        ESTIMATED TOTAL FOR ADDITIVE BID ITEM NO. 0016  $====

0017   Dredging of Conley
       Terminal Berth Areas
       14, 15, 16, and 17

0017A  Maintenance Dredging
       and Disposal (Includes
       2,300 C.Y. of overdepth)       21,400      C.Y.      $____       $____

0017B  Improvement Dredging 
       and Disposal (Includes
       9,800 C.Y. of overdepth)       17,100      C.Y.      $____       $____

                        ESTIMATED TOTAL FOR ADDITIVE BID ITEM NO. 0017  $====

0018   Dredging of Mystic Piers
       1 and 2 Berth Areas

0018A  Maintenance Dredging
       and Disposal (Includes
       6,600 C.Y. of overdepth)       20,600      C.Y.      $____       $____

0018B  Improvement Dredging
       and Disposal (Includes
       6,300 C.Y. of overdepth)        6,300      C.Y.      $____       $____

                        ESTIMATED TOTAL FOR ADDITIVE BID ITEM NO. 0018  $====

                                    00010-5
<PAGE>
 
<TABLE> 
<CAPTION> 
Item                                  Estimated                     Unit        Estimated
No.       Description                 Quantity       Unit           Price       Amount
- ----------------------------------------------------------------------------------------------
<S>       <C>                         <C>            <C>         <C>            <C> 
0019      Dredging of Army Base 1-3
          Berth Areas

0019A     Maintenance Dredging
          and Disposal (Includes
          8,600 C.Y. of overdepth)      31,100        C.Y.       $_____________ $_____________

0019B     Improvement Dredging
          and Disposal (Includes
          4,600 C.Y. of overdepth)       4,600        C.Y.       $_____________ $_____________

                               ESTIMATED TOTAL FOR ADDITIVE BID ITEM NO. 0019   $
                                                                                 =============

0020      Dredging of Mystic Piers
          49 and 50 Berth Areas

0020A     Maintenance Dredging
          and Disposal (Includes
          2,700 C.Y. of overdepth)      39,500        C.Y.       $_____________ $_____________

0020B     Improvement Dredging
          and Disposal (Includes
          3,300 C.Y. of overdepth)       3,300        C.Y.       $_____________ $_____________

                               ESTIMATED TOTAL FOR ADDITIVE BID ITEM NO. 0020   $
                                                                                 =============
</TABLE> 

NOTE 1:  EVALUATION OF BIDS - ADDITIVE ITEMS   252.236-7007 (DEC 1991):
         -------------------------------------------------------------

     (a)  The low offeror and the items to be awarded shall be determined as 
follows--

     (1)  Prior to the opening of bids, the Government will determine the amount
of funds available for the project.

     (2)  The low offeror shall be the Offeror that--

     (i)  Is otherwise eligible for award; and

     (ii) Offers the lowest aggregate amount for the TOTAL ESTIMATED BASE BID, 
plus (in the order stated in the list of priorities in the bid schedule) those 
additive or deductive items that provide the most features within the funds 
determined available.

     (3)  The Contracting Officer shall evaluate all bids on the basis of the 
same additive or deductive items.

     (i)  If adding another item from the bid schedule list of priorities would 
make the award exceed the available funds for all offerors, the Contracting 
Officer will skip that item and go to the next item from the bid schedule of 
priorities; and

     (ii) Add that next item if an award may be made that includes that item and
is within the available funds.

     (b)  The Contracting Officer will use the list of priorities in the bid 
schedule only to determine the low offeror. After determining the low offeror, 
an award may be made on any combination of items if--

     (1)  It is in the best interest of the Government;

     (2)  Funds are available at the time of award; and 

     (3)  The low offeror's price for the combination to be awarded is less than
the price offered by any other responsive, responsible offeror.

     (c)  Example:

     The amount available is $100,000. Offeror A's base bid and four additives 
(in the order stated in the list of priorities in the bid Schedule)

                                    00010-6
<PAGE>
 
are $85,000, $10,000, $8,000, $6,000, and $4,000. Offeror B's base bid and four 
additives are $80,000, $16,000, $9,000, $7,000, and $4,000. Offeror A is the low
offeror. The aggregate amount of offeror A's bid for purposes of award would be 
$99,000, which includes a base bid plus the first and fourth additives. The 
second and third additives were skipped because each of them would cause the 
aggregate bid to exceed $100.000.

                              (End of provision)

NOTE 2:   CONTRACT AWARD:  The work will be awarded to one bidder. Bidders shall
          --------------
bid all items set forth on the Bidding Schedule.

NOTE 3:   FUNDING LIMITATIONS - UNBALANCED BIDS:  Due to funding limitations, it
          -------------------------------------
is mandatory that bids not be unbalanced. If, in the opinion of the Government, 
the low bidder has unbalanced his bid, the Government will require the bidder to
furnish a breakdown of his bid in such detail as will enable the Government to 
take appropriate action.

NOTE 4:   SCOPE OF CONTRACT:  The work represented by the base bid will be the 
          -----------------
minimum amount of work awarded within the funds available.

                                    00010-7

<PAGE>
 
                      PLANT AND EQUIPMENT SCHEDULE/SURVEY
                      -----------------------------------
                          Available Plant to be Used
                          --------------------------
                         (To Be Attached to Bid Form)

The bidder must complete the PLANT AND EQUIPMENT SCHEDULE listing the plant 
available to the Bidder and proposed to be used on the work. Prior to 
commencement of work at the site, the Contractor will be required to submit for 
review copies of all applicable current inspections and certificates for all 
floating plant. See Section 01600 - Plant and Equipment.

BUCKET DREDGE (Clamshell/Dipper/Excavator/Dragline) (Check Type of Plant)
- -------------------------------------------------------------------------

===============================================================================
                                               Capacity of   Swings    Type of
                            Age &    Size of    Plant (*)      Per      Hp of  
Number/Name    Manfactr   Condition   Bucket   (Cu. Yds/Mo)   Hour      Engine
- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------

(*) When working materials similar to those anticipated to be encountered in the
performance of work.

BOATS AND BARGES/SCOWS
- ----------------------

================================================================================
                               Age &       No. & Size      
Number/Name     Manfactr    Conditions     of Drills
- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------

ATTENDANT PLANT (Give columnar information pertinent to items listed, if to
- ----------------------------------------------------------------------------
be used)
- --------

==============================================================================
                  No. to       HP of      Length        Draft        Capacity
         Name     Be Used      Engine     & Beam    Light   Loaded   (Cu. Yds)
- ------------------------------------------------------------------------------ 
Tug
- ------------------------------------------------------------------------------ 
Tug
- ------------------------------------------------------------------------------ 
Launch
- ------------------------------------------------------------------------------ 
Scow
- ------------------------------------------------------------------------------ 
Scow
- ------------------------------------------------------------------------------ 
Pipeline
- ------------------------------------------------------------------------------ 
 Shore
- ------------------------------------------------------------------------------ 
 Pontoon
- ------------------------------------------------------------------------------ 

  -- End of Section --

                                    00010-8
<PAGE>
 
                          DOCUMENT TABLE OF CONTENTS

                            DIVISION 00 - DOCUMENTS

                         SPECIAL CONTRACT REQUIREMENTS


1.1  COMMENCEMENT, PROSECUTION AND COMPLETION OF WORK                 (APR 1984)
     FAR 52.211-10
1.2  LIQUIDATED DAMAGES - CONSTRUCTION (APR 1984) FAR 52.211-12
1.3  CONTRACT DRAWINGS, MAPS AND SPECIFICATIONS (DEC 1991)                 DFARS
     252.236-7001
1.4  DESIGNATED BILLING OFFICE (NEDCD)
1.5  BID GUARANTEE (SEP 1996) FAR 52.228-1
1.6  INSURANCE REQUIRED
1.7  PERFORMANCE OF WORK BY THE CONTRACTOR (APR 1984) FAR 52.236-1
1.8  PERFORMANCE AND PAYMENT BONDS (APR 1984) FAR 28.102.
1.9  OBSTRUCTION OF NAVIGABLE WATERWAYS (DEC 1991)
1.10  PAYMENT FOR MOBILIZATION AND DEMOBILIZATION                     (DEC 1991)
     DFARS 252.236-7004.
1.11  QUANTITY SURVEYS
1.12  LAYOUT OF WORK (APR 1984) 52.236-17

- -- End of Document Table Of Contents --


                    DOCUMENT TABLE OF CONTENTS 00800 PAGE 1
<PAGE>
 
                         SPECIAL CONTRACT REQUIREMENTS

1.1  COMMENCEMENT, PROSECUTION AND COMPLETION OF WORK
     (APR 1984) FAR 52.211-10

     a.   The Contractor shall be required to--

          (1)  commence work under this contract within 15 calendar days after 
          the date the Contractor receives the notice to proceed, 

          (2)  prosecute the work diligently, and 

          (3)  complete the entire work ready for use not later than 540 
          calendar days after the date the Contractor receives notice to
          proceed. The time stated for completion shall include final cleanup of
          the premises. See paragraph, "Work Sequence" in Section: SUMMARY OF
          WORK.

1.2  LIQUIDATED DAMAGES - CONSTRUCTION (APR 1984) FAR 52.211-12

     a.   If the Contractor fails to complete the work within the time specified
     in the contract, or any extension, the Contractor shall pay to the
     Government as liquidated damages, the sum of $5,300.00 for each day of
     delay.

     b.   If the Government terminates the Contractor's right to proceed, the 
     resulting damage will consist of liquidated damages until such reasonable
     time as may be required for final completion of the work together with any
     increased costs occasioned the Government in completing the work.

     c.   If the Government does not terminate the Contractor's right to 
     proceed, the resulting damage will consist of liquidated damages until the
     work is completed or accepted.

1.3  CONTRACT DRAWINGS, MAPS AND SPECIFICATIONS (DEC 1991)
     DFARS 252.236-7001

     a.   The Government--

          1.   Will provide the Contractor, without charge, 5 sets of 
          large-scale contract drawings and specifications except publications
          incorporated into the technical provisions by reference;

          2.   Will furnish additional sets on request, for the cost of 
          reproduction; and

          3.   May, at its option, furnish the Contractor one set of 
          reproducibles, or half-size drawings, in lieu of the drawings in
          paragraph (a)(1) of this clause.

     b.   The Contractor shall--

          1.   Check all drawings furnished immediately upon receipt;

          2.   Compare all drawings and verify the figures before laying out the
          work;

          3.   Promptly notify the Contracting Officer of any discrepancies; and

                            DOCUMENT 00800   Page 1

<PAGE>
 
          4.   Be responsible for any errors which might have been avoided by 
          complying with this paragraph (b)

     c.   Large scale drawings shall, in general, govern small scale drawings. 
     Figures marked on drawings shall, in general, be followed in preference to
     scale measurements.

     d.   Omissions from the drawings or specifications or the misdescription of
     details of work which are manifestly necessary to carry out the intent of
     the drawings and specifications, or which are customarily performed, shall
     not relieve the contractor from performing such omitted or misdescribed
     details of the work, but shall be performed as if fully and correctly set
     forth and described in the drawings and specifications.

     e.   The work shall conform to the specifications and the contract drawings
     identified on the following index of drawings:

     Drawing        Sheet              
       No.           No.               Title
     ----------------------------------------------------------
                                    BOSTON HARBOR NAVIGATION
     IMPROVEMENT
                                    AND BERTH DREDGING PROJECT 
                                    BOSTON, MASSACHUSETTS

           1878        1   (T-1)        Cover Sheet and Index

1.4  DESIGNATED BILLING OFFICE (NEDCD)

  Reference Contract Clause titled "PROMPT PAYMENT FOR CONSTRUCTION CONTRACTS"
  located in SECTION 00700, CONTRACT CLAUSES. The "designated billing office"
  will be the Construction Area Engineer, Resident Engineer or project office
  where the Contracting Officer Representative for this contract is located. The
  Contractor will be notified of the exact location of this office at the
  project preconstruction conference specified in Section 01010 SUMMARY OF WORK.

1.5  BID GUARANTEE (SEP 1996) FAR 52.228-1

          (a)  Failure to furnish a bid guarantee in the proper form and amount,
     by the time set for opening of bids, may be cause for rejection of the bid.

          (b)  The bidder shall furnish a bid guarantee in the form of a firm 
     commitment, e.g., bid bond supported by good and sufficient surety or
     sureties acceptable to the Government, postal money order, certified check,
     cashier's check, irrevocable letter of credit, or, under Treasury
     Department regulations, certain bonds or notes of the United States. The
     Contracting Officer will return bid guarantees, other than bid bonds, (1)
     to unsuccessful bidders as soon as practicable after the opening of bids,
     and (2) to the successful bidder upon execution of contractual documents
     and bonds (including any necessary coinsurance or reinsurance agreements),
     as required by the bid as accepted.

          (c)  The amount of the bid guarantee shall be twenty percent of the 
     bid price or $3,000,000, whichever is less.

          (d)  If the successful bidder, upon acceptance of its bid by the 
     Government within the period specified for acceptance, fails to execute all
     contractual documents or furnish executed bond(s) within 10 days after
     receipt of the forms by the bidder, the Contracting Officer may terminate
     the contract for default.

                            DOCUMENT 00800   page 2

<PAGE>
 
          (e) In the event the contract is terminated for default, the bidder is
     liable for any cost of acquiring the work that exceeds the amount of its
     bid, and the bid guarantee is available to offset the difference.

1.6  INSURANCE REQUIRED                                                         

 The insurance requirements set forth in this Special Contract Requirement apply
 only to dredging activities to be conducted in the following non-Federal berth
 areas. 

     MASSPORT Berths: Dennis Kay, Deputy Port Director of Operations,
     Massachusetts Port Authority, Maritime Department Fish Pier East, Bldg II
     Northern Ave, Boston, MA 02210 - (617) 946-4439 (617) 946-4422 (fax)

     Mr. Paul Pace, Distrigas, 18 Rover St, Everett, MA 02149 - (617) 381-8254
     (617) 381-8599 (fax)

     Mr. John Spigel or Mr. Tony LiBurdi, Prolerized of New England, P.O. Box
     48, Everett, MA 02149 - (617) 389-8300 (617) 389-8030 (fax)

 The Contractor shall indemnify each of the Berth owners listed above for
 property damage and personal injury arising from dredging activities occurring
 at non-Federal berth areas.

 The Contractor shall not commence work at the non-Federal berths listed above
 under this contract until he has obtained all the insurance required by this
 Special Contract Requirement. The types and minimum amounts of the insurance to
 be provided for by the Contractor shall be as follows:

 A.   Worker's Compensation Insurance

 The Contractor shall, before commencing performance of the contract, provide by
 insurance, or by evidence of satisfactory compliance with the regulations of
 the Commonwealth of Massachusetts regarding self-insurance, for the payment of
 compensation and the furnishing of other benefits under Chapter 152 of the
 General Laws, as amended, and the Longshoreman's and Harbor Workers
 Compensation Act, to all persons to be employed under the contract working in
 berth areas, and he shall continue insurance in full force and effect during
 the term of the contract.

 Failure to provide and continue in force such benefits as aforesaid shall be
 deemed a material breach of the berth areas dredging portion of the contract
 and shall operate as an immediate termination thereof.

 B.   Public Liability (Bodily Injury Liability and Property Damage Liability 
 Insurance)

 The Contractor shall purchase and maintain until final acceptance of the work
 such Public Liability Insurance as shall protect him from claims for damages
 for bodily injury, including accidental death, as well as from claims for
 property damage, which may arise from operations under this contract, whether
 such operations be by himself or by any Subcontractor or by anyone directly or
 indirectly employed by either of them, in the amounts set forth below:

     Bodily Injury Liability Insurance for bodily injuries, including wrongful
     death, to any one person, and as the result of any one occurrence; and
        
     Property Damage Liability Insurance for damages on account of any one 
     occurrence and for damages as the result of all occurrences during the
     policy period for a combined single limit of $10,000,000. Said policy shall
     be on an occurrence basis and the Authority shall be included as

                             DOCUMENT 00800 Page 3

<PAGE>
 
     an Additional Insured.

C.   Contingency Liability

The above policies for Public Liability (Bodily Injury Liability and Property 
Damage Liability Insurance) must be so written as to include Contingent Public 
Liability Insurance to protect the Contractor against claims arising from the 
operations of subcontractors, and in the same limits as set forth in "B" above.

D.   Subcontractor's Public Liability (Bodily Injury Liability and Property 
Damage Liability Insurance)

Subcontractors shall carry Public Liability Insurance, as in "B" and "C" above 
with limits of:

Bodily Injury Liability Insurance for bodily injuries, including wrongful 
death, to any one person, and as the result of any one occurrence; and Property 
Damage Liability Insurance for damages on account of any one occurrence and for 
damages as the result of all occurrences during the policy period for a combined
single limit of $10,000,000. Said policy shall be on an occurrence basis and the
Massachusetts Port Authority shall be included as an Additional Insured.

E.   Protection an Indemnity Coverage

The Contractor shall purchase Protection and Indemnity coverage, including and 
endorsement for hull removal for all vessels used in the above-described berth 
areas, with minimum coverage of at least $2,000,000.

F.   Exclusions

Any exclusions contained in policies required under this contract shall be 
subject to buy-back by the Contractor and/or Subcontractors in order that the 
particular coverage removed from the policy by the Exclusion may be purchased by
the Contractor or Subcontractor and be included under the insurance requirements
hereunder.

G.   Fire Insurance

Each berth owner, at its expense, will secure Fire and Extended Coverage 
Insurance on any of its pre-existing buildings. Loss, if any, shall be adjusted 
to the berth owners, and payable as the respective interests may appear. Berth 
owners do not provide coverage to tenant interests. Each berth owner's 
obligation to secure insurance is limited as stated herein.

The Contractor shall provide property insurance (Builders Risk/Fire Legal 
Liability) upon the entire work at the berths listed above to the full insurable
interest thereof and shall with respect to said property insurance designate the
owner of the respective property as Additional Insured as their interest may 
appear.

For Insurance purposes, the site of work and/or the project site includes not 
only the limited physical work areas involved but also certain other areas of 
operations set up for utility, sanitary, electrical, water, pollution control, 
disposal and cleaning purposes: to furnish materials for the work including 
storage and stock pile areas and all routes between and among them.

H.   General

No cancellation, or modification whether by the insurer or by the insured, 
shall be valid unless written notice thereof is given by the party proposing 
cancellation of modification to the other party and to the officer or agent who 
awarded the contract, at least fifteen days prior to 

                             DOCUMENT 00800 Page 4
<PAGE>
 
  the intended effective date thereof, which date shall be expressed in said
  notice. Notice sent by the party proposing cancellation or modification by
  registered mail, postage pad with a return receipt of the addressee required,
  shall be sufficient notice. An affidavit of any duly authorized officer,
  agency, or employee of the insurer or of the insured as the case may be, that
  he has sent such notice addressed as aforesaid shall be prima facie evidence
  of the sending thereof. This section shall apply to the legal representatives,
  trustee in bankruptcy, receiver, assignee, trustee, and the successor in
  interest of any such Contractor.

  The insurance herein before stipulated shall be carried until all work
  required to be performed at non-Federal berth areas under the terms of the
  contract is satisfactorily completed as evidence by the formal acceptance by
  the Contracting Officer.

  Certified copies of all required insurance policies shall be delivered in
  duplicate to the Contracting Officer. Each policy shall be with a responsible
  insurance company or companies, qualified to assume the risk, and acceptable
  to the Contracting Officer.

  The cost of all insurance required by the Contractor or Subcontractors for
  work at non-Federal berth areas shall be included in the applicable bid items
  shown on the BIDDING SCHEDULE.

  For all liability insurance required under this Special Contract Requirement, 
  each berth owner shall be included as an Additional Insured.

  If by the terms of this insurance a mandatory deductible is required, in the
  event of a paid claim the Contractor shall be responsible for the deductible
  amount.

1.7  PERFORMANCE OF WORK BY THE CONTRACTOR (APR 1984) FAR 52.236-1

  The Contractor shall perform on the site, and with its own organization, work
  equivalent to at least seventy-five percent (75%) of the total amount of work
  to be performed under the contract. This performance may be reduced by a
  supplemental agreement to this contract if, during performing the work, the
  Contractor requests a reduction and the Contracting Officer determines that
  the reduction would be to the advantage of the Government.

1.8  PERFORMANCE AND PAYMENT BONDS (APR 1984) FAR 28.102.

  Within ten (10) days after the prescribed forms are presented to the bidder to
  whom award is made for signature, a performance bond (Standard Form 25) and a
  payment bond (Standard Form 25A), each with good and sufficient surety or
  sureties acceptable to the Government, shall be furnished. Each form shall
  show the contract number to which the bond applies. The penal sums of such
  bonds will be as follows:

     a.  Performance Bond: The penal sum of the performance bond shall equal one
     hundred percent (100%) of the contract price. In accordance with the
     Federal Tax Lien Act of 1966, the performance bond shall provide coverage
     for taxes imposed by the United States which are collected, deducted, or
     withheld from wages paid by the Contractor in carrying out the contract.

     b.  Payment Bond:

          (1) When the contract price is $1,000,000 or less, the penal sum will
          be fifty percent (50%) of the contract price.

          (2) When the contract price is in excess of $1,000,000 but not more
          than $5,000,000, the penal sum shall be forty percent (40%) of the
          contract price.

                             DOCUMENT 00800  Page 5
<PAGE>
 
            (3)   When the contract price is more than $5,000,000, the penal sum
            shall be $2,500,000.

1.9    OBSTRUCTION OF NAVIGABLE WATERWAYS (DEC 1991)

  (a)  The Contractor shall --

       (1)  Promptly recover and remove any material, plant, machinery, or 
       appliance which the Contractor loses, dumps, throws overboard, sinks, or
       misplaces, and which, in the opinion of the Contracting Officer, may be
       dangerous to or obstruct navigation;

       (2)  Give immediate notice, with description and locations of any such 
       obstructions, to the Contracting Officer; and

       (3)  When required by the Contracting Officer, mark or buoy such 
       obstructions until the same are removed.

  (b)  The Contracting Officer may --

       (1)  Remove the obstructions by contract or otherwise should the
       Contractor refuse, neglect, or delay compliance with paragraph (a) of
       this clause; and

       (2)  Deduct the cost of removal from any monies due or to become due to 
       the Contractor; or

       (3)  Recover the cost of removal under the Contractor's bond.

  (c)  The Contractor's liability for the removal of a vessel wrecked or sunk
       without fault or negligence is limited to that provided in Sections 15,
       19, and 20 of the River and Harbor Act of March 3, 1889 (33 U.S.C. 409 
       et.seq.).

1.10   PAYMENT FOR MOBILIZATION AND DEMOBILIZATION
       (DEC 1991) DFARS 252.236-7004.

  a.   The Government will pay all costs for the mobilization and demobilization
  of all of the Contractor's plant and equipment at the contract lump sum price 
  for this item.

       (1)  Sixty percent of the lump sum price upon completion of the 
       Contractor's mobilization at the work site.

       (2)  The remaining 40 percent upon completion of demobilization.

  b.   The Contracting Officer may require the Contractor to furnish cost data
  to justify this portion of the bid if the Contracting Officer believes that
  the percentages in paragraphs a(1) and a(2) of this clause do not bear a
  reasonable relation to the cost of the work in this contract.

       (1)  Failure to justify such price to the satisfaction of the Contracting
       Officer will result in payment, as determined by the Contracting Officer,
       of --

            (i)   Actual mobilization costs at completion of mobilization;

            (ii)  Actual demobilization costs at completion of demobilization;
            and   
            (iii) The remainder of this item in the final payment under this    
            contract.

       (2)  The Contracting Officer's determination of the actual costs in 
       paragraph b(1) of this clause is not subject to appeal.

                             DOCUMENT 00800 Page 6
<PAGE>
 
1.11    QUANTITY SURVEYS.

        (a) The original and final quantity surveys will be conducted by the 
        Government, and the data derived from these surveys shall be used in
        computing the quantities of work performed and the actual construction
        completed and in place.

        (b) The Contractor shall conduct surveys for any periods for which 
        progress payments are requested, and other surveys as required by the
        specifications and drawings. These surveys shall be conducted under the
        direction of a representative of the Contracting Officer, unless the
        contracting Officer waives this requirement in a specific instance. The
        Government shall make such computations as are necessary to determine
        the quantities of work performed or finally in place. The Contractor
        shall make the computations based on the surveys for any periods for
        which progress payments are requested.

        (c) Promptly upon completing a survey, the Contractor shall furnish the 
        originals of all field notes and all other records relating to the
        survey or to the layout of the work to the Contracting Officer, who
        shall use them as necessary to determine the amount of progress
        payments. The Contractor shall retain copies of all such material
        furnished to the Contracting Officer.

1.12    LAYOUT OF WORK  (APR 1984) 52.236-17

   The Contractor shall lay out its work from Government established base lines
   and bench marks indicated on the drawings, and shall be responsible for all
   measurements in connection with the layout. The Contractor shall furnish, at
   its own expense, all stakes, templates, platforms, equipment, tools,
   materials, and labor required to lay out any part of the work. The Contractor
   shall be responsible for executing the work to the lines and grades that may
   be established or indicated by the Contracting Officer. The Contractor shall
   also be responsible for maintaining and preserving all stakes and other marks
   established by the Contracting Officer until authorized to remove them. If
   such marks are destroyed by the Contractor or through its negligence before
   their removal is authorized, the Contracting Officer may replace them and
   deduct the expense of the replacement from any amounts due or to become due
   to the Contractor.


   -- End of Special Contract Requirements --


                             DOCUMENT 00800 Page 7
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                           PROJECT TABLE OF CONTENTS

  DIVISION 01 - GENERAL REQUIREMENTS

  01010 SUMMARY OF WORK
  01025 MEASUREMENT AND PAYMENT
  01050 FIELD ENGINEERING
  01130 ENVIRONMENTAL PROTECTION
  01135 WATER QUALITY MONITORING AND CONTROL 
  01300 SUBMITTAL PROCEDURES
  01440 CONTRACTOR QUALITY CONTROL   
  01500 CONSTRUCTION FACILITIES AND TEMPORARY CONTROLS
  01600 PLANT AND EQUIPMENT
  01900 GENERAL SAFETY REQUIREMENTS

  DIVISION 02 - SITE WORK

  02482 DREDGING
  02491 UNDERWATER DRILLING AND BLASTING
  02492 UNDERWATER DIVING WORK

  -- End of Project Table of Contents -- 

                       PROJECT TABLE OF CONTENTS PAGE 1

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                           SECTION TABLE OF CONTENTS

                      DIVISION 01 - GENERAL REQUIREMENTS

                                 SECTION 01010

                                SUMMARY OF WORK

     PART 1    GENERAL

      1.1     SUMMARY
        1.1.1   General Description of the Work
      1.2     SUBMITTALS
      1.3     PROJECT/SITE CONDITIONS
        1.3.1   Physical Data
      1.4     SEQUENCING AND SCHEDULING
        1.4.1   Hours of Operations
        1.4.2   Work Sequence
          1.4.2.1   General 
          1.4.2.2   Progress Schedule
        1.4.3   Organization at the Site
          1.4.3.1   General
          1.4.3.2   Rate of Progress
      1.5     WORK LIMITS
      1.6     STORAGE AREAS
      1.7     COORDINATION
        1.7.1   Notice of Mariners
        1.7.2   Aids to Navigation
        1.7.3   Boston Lobstermen
        1.7.4   Coast Guard
        1.7.5   Harbormaster
        1.7.6   Docking Pilots
        1.7.7   Coordination with Berth Owners
        1.7.8   Weekly Schedule to Users of the Harbor
      1.8     MASSACHUSETTS DEPT OF ENVIRONMENTAL PROTECTION (MDEP) SIGN
      1.9     PRECONSTRUCTION CONFERENCE

     PART 2    PRODUCTS (NOT USED)

     PART 3    EXECUTION (NOT USED)

     --  End of Section Table of Contents  --


                    SECTION TABLE OF CONTENTS 01010 PAGE 1

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

 
                                 SECTION 01010

                                SUMMARY OF WORK

PART 1  GENERAL

1.1  SUMMARY

  The work of this contract is described in the following documents:

     a. Specifications titled:

     BOSTON HARBOR NAVIGATION IMPROVEMENT AND
     BERTH DREDGING PROJECT
     BOSTON, MASSACHUSETTS

     b. Contract Drawings as listed in the Special Contract Requirements.

  Furnish all plant, labor, equipment, appliances and materials, and carry out
  all operations, including monitoring and other field engineering, as necessary
  to accomplish the work, complete. Perform the work in strict accordance with
  these specifications and the contract drawings, and subject to the terms and
  conditions of the contract and all applicable permits, certifications, codes
  and regulations.
 
1.1.1  General Description of the Work

  The general description below is given to indicate the approximate scope of
  this project only. It does not limit the work required under the project
  drawings and specifications:

  The work of this project consists of maintenance and improvement dredging of
  Boston Harbor channels and berths, Boston, Massachusetts. The channels consist
  of three tributaries: the Chelsea, the Mystic, and the Reserved. The work
  requires the construction of in-channel disposal cells up to seven nautical
  miles from the areas shown to be dredged. Overlying maintenance material from
  the dredge sites and disposal cells will be disposed in the cells and the
  cells will be capped using clean granular material. Improvement dredging
  material dredged from the Harbor and from construction of the disposal cells
  will be disposed of at the Masschusetts Bay Disposal Site (MBDS) approximately
  30 nautical miles from the Harbor.

1.2  SUBMITTALS

  Government approval is required for submittals with a "GA" designation;
  submittals having an "FIO" designation are for information only. The following
  shall be submitted in accordance with Section 01300 SUBMITTAL DESCRIPTIONS:

     SD-07 Schedules

  Progress Schedule; GA,C reviewer.

  In accordance with the contract provisions, the Contractor shall, within five
  (5) days after receipt of notice to proceed or as otherwise determined by the
  Contracting Officer, submit for approval a practicable progress schedule. When
  changes are authorized that result in contract time extensions, the
  Contractor shall submit a modified chart for approval by the Contracting
  Officer.

1.3  PROJECT/SITE CONDITIONS

1.3.1  Physical Data  

                             SECTION 01010 Page 1
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  Data and information furnished or referred to below is for the Contractor's
  information. The Government shall not be responsible for any interpretation of
  or conclusion drawn from the data or information by the Contractor.

     a.   Site Conditions:  The indications of physical conditions on the 
     drawings and in the specifications are the result of site
     investigations and surveys. The conditions represented prevailed at the
     time the investigations and surveys were made. A pre-dredge survey of
     Boston Harbor will be performed by the Government prior to the start of
     Contractor dredging operations at the site. Before commencing work at the
     site, the Contractor shall verify the conditions indicated on the drawings
     and in the specifications and perform all other surveys as needed or as
     required in the contract documents.

     b.   Weather Conditions:  The monthly normal mean temperature and the 
     monthly normal mean precipitation for the site maybe obtained by the
     Contractor from the nearest U.S. National Weather Service Office.

     c.   Transportation:  The Contractor shall make his own investigation on 
     the use of municipal, State and Federal highways, roads, bridges, and
     railroads.

     d.   Flow Data:  The maximum current in the Boston Harbor and the upper 
     portion of the Main Ship Channel during flood and ebb is one foot per
     second.

     e.   Tide Conditions:  The mean range of tide at Boston Harbor is 9.4 feet 
     and the spring range is 11.0 feet.  The Massachusetts Bay Disposal Site is 
     subject to open ocean conditions.

     f.   Channel Traffic:  Boston Harbor and the adjacent areas to be dredged 
     are mainly used by deep draft commercial vessels, fishing vessels, and
     numerous small recreation and commercial craft, which may cause some
     interference with contract operations. Oil barges frequent the harbor
     during the winter heating season. The Contractor shall move the dredging
     equipment if vessel traffic requires it, based on the determination of the
     docking pilot.

     g.   Height Limitations:  The Contractor shall coordinate his construction 
     activities with the FAA and Massport Aviation Department's Operation Unit.
     Height limitations of crane booms, hoisting equipment or other equipment
     used by the contractor to complete the dredging shall conform to the
     ceiling heights established by the FAA. The Government submitted a FAA Form
     7460 to the FAA on December 19, 1997 for equipment height of 120 feet above
     mean sea level. The Contractor shall review of the submittal and the FAA
     response when available and submit to the FAA a request for any necessary
     amendments. The FAA will require at least 45 days for review the submittal.
     The Contractor shall review the submittal and the FAA response when
     available and submit to the FAA a request for any necessary amendments. The
     FAA will require the Contractor to stop work in the event declining weather
     conditions hinder visibility to the extent that the Contractor's plant
     becomes a hazard to flying aircraft. Also, when performing dredging
     operations in the Reserved or Main Ship channel near the airport, the
     dredge shall not be moored in the area during non-work periods or the
     craine boom shall be lowered.

1.4  SEQUENCING AND SCHEDULING

1.4.1     Hours of Operations

     Except as specified for particular items of work, such as blasting, the
     Contractor will be allowed to perform work 24 hours per day, 7 days per
     week, including holidays, for the entire performance period. Refer to other
     sections of these specifications for environmental requirements and

                             SECTION 01010  Page 2
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

          restrictions to dredging and disposal activities and for temporary
          suspension of the work, if required. Contractor coordination with the
          berth owners is required to accomplish this work.

          To reduce the impact on rush hour traffic, transit through the Chelsea
          Street and McArdle Street bridges that requires opening the bridges
          will be prohibited Monday through Friday 7:30 to 9:30 A.M. and 4:30 to
          6:30 P.M.

     1.4.2     Work Sequence

     1.4.2.1   General

          There are certain essential criteria relative to the preparation of a
          work sequence and time schedule which the Contractor will be required
          to implement and follow during the prosecution of the work. See
          Section 02482 for the required order of work. Minor variations in the
          sequence of the items of work as approved may be made by the
          Contractor, provided such variations do not conflict with critical
          elements of the schedule and permit requirements. Variations shall be
          approved by the Contracting Officer prior to implementation.

     1.4.2.2   Progress Schedule

          The progress schedule shall be in the form of a chart graphically
          indicating the sequence proposed to accomplish each work feature or
          operation. The chart shall be prepared to show the starting and
          completion dates of all work features on a linear horizontal time
          scale beginning with date of Notice to Proceed and indicating calendar
          days to completion. Contractor shall indicate on the chart the
          important work features or operations that are critical to the timely
          overall completion of the project. Key dates for such important work
          features and portions of work features are milestone dates and shall
          be so indicated on the chart. This schedule will be the medium through
          which the timeliness of the Contractor's construction effort is
          appraised. Anticipated adverse weather delay days shall be included in
          the schedule.

     1.4.3     Organization at the Site

     1.4.3.1   General

          The contractor shall employ ample personnel and sufficient equipment
          to accomplish the work of this contract in the least amount of time,
          within the specified prosecution period.

     1.4.3.2   Rate of Progress

          Should the Contractor fail to maintain a satisfactory rate of
          progress, the Contracting Officer may require that additional
          personnel and equipment be placed on the work and weekend and overtime
          work be performed, in order that the work be brought up to schedule
          and maintained.

     1.5    WORK LIMITS

          The work shall be restricted to the areas as shown on the contract 
          drawings in addition to storage areas provided by the Government.
          
     1.6    STORAGE AREAS

          Storage areas within the limits of work will be provided to the
          Contractor by the Government as indicated below. The areas will be
          made available for Contractor's office trailers, one Government Field
          Office Trailer, parking, and other minor materials. See Section
          01500 CONSTRUCTION FACILITIES AND TEMPORARY CONTROLS for additional
          information on trailers. The Contractor shall confine his storage
          areas to the limits as designated or approved by the Contracting
          Officer and shall be responsible for the security of the

                            SECTION 01010   PAGE 3


<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  areas. Upon completion of the contract, the Contractor shall remove all
  equipment and materials, except as otherwise specified, and restore the site
  to its original condition as approved by the Contracting Officer at no
  additional cost to the Government.

     a.   Two staging/storage areas on Massport property are available for use 
     by the Contractor and the Government as listed below. Berthing will be
     available for the Contractor's barges at both of the sites listed. The
     Contractor shall verify the locations of the actual sites and all
     applicable conditions for their use with Massport representatives and the
     Contracting Officer:

          1)   Conley Terminal, First Street and Farragut Road, South Boston. 
          Massport Representatives is Mr. Dennis Kay, Deputy Port Director for
          Operations, tel. 617-946-4439.

          2)   East Boston Pier 1, 1 South Breman Street, East Boston. Massport
          Representative is Mr. Orville Wilson, Director of Property Management,
          tel. 617-478-6920.

1.7  COORDINATION

1.7.1  Notice to Mariners

  Before beginning dredging operations and barge transport of dredged materials,
  the Contractor shall coordinate with the Coast Guard to issue a "Notice to
  Mariners" regarding the Contractor's operations.

1.7.2  Aids to Navigation

  Aids to navigation have been placed by the Coast Guard. The Contractor shall
  coordinate with the Coast Guard in advance of dredging and disposal work to
  provide for any necessary relocation or movement of aids to navigation. The
  Contractor shall also contact the Coast Guard at the completion of all work
  and the removal of all dredging plant from the Harbor. Point of Contact for
  Coast Guard: Mr. Matt Stuck (617) 223-8347 (617) 223-8073 (fax)

1.7.3  Boston Lobstermen

  Before beginning dredging operations and barge transport of dredged materials,
  the Contractor shall coordinate work areas and barge routes with the Boston
  Harbor Lobstermen's Cooperative, (Mr. Al Ferent, 287 K Street, South Boston,
  MA 02127 Telephone Number (617) 268-4199; and the Massachusetts Lobstermen's
  Association Mr. Bill Adler, 8 Otis Place, Scituate, MA 02066, Telephone
  Numbers (617) 545-6984 and (617) 545-7837(fax).

1.7.4  Coast Guard

  All work conducted in areas in or adjacent to the ship channel shall be 
  coordinated with the U.S. Coast Guard.

1.7.5  Harbormaster

  Before beginning dredging operations and barge transport of dredged materials,
  the Contractor shall coordinate his work operations with the Boston Harbor
  Master, Mr. Erik Hahn, Boston Police Department, Telephone Number (617) 343-
  4721, (617) 343-5349(fax), Internet [email protected].

1.7.6  Docking Pilots

  Because the tributaries to be dredged are narrow and in many cases will not 
  permit ship traffic during dredging operations, timely communication between 
  the dredge and the Docking Pilots is necessary to avoid conflicts. The 
  Contractor shall maintain daily telephone contact with the dispatchers

                             SECTION 01010 Page 4








<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

     at Boston Towing and Transportation (617) 567-9100 ext 111 or ext 112 and
     Bay State Towing (617) 561-0223. While dredge operations are underway the
     Contractor shall monitor VHF channel 13. Since vessel movements are apt to
     occur on a random basis, the Contractor shall provide a positive means of
     communication between the dredge and the towing companies such as a cell
     phone number.

1.7.7  Coordination with Berth Owners

     The Contractor shall coordinate his work operations with the owners of
     berth areas a minimum of 14 days prior to dredging or other work at or
     adjacent to a berth area.  Scheduling of dredging activities at active
     berth areas will require working around anticipated ship docking and waying
     schedules. Points of contact for berth areas are listed below:

          MASSPORT Berths: Dennis Kay, Deputy Port Director of Operations,
          Massachusetts Port Authority, Maritime Department Fish Pier East, Bldg
          II Northern Ave, Boston, MA 02210 - (617) 946-4439 (617) 946-4422
          (fax)

          Mr. Paul Pace, Distrigas, 18 Rover St, Everett, Ma 02149 - (617 381-
          8524 (617) 381-8599 (fax)

          Mr. John Spigel or Mr. Tony LiBurdi, Prolerized of New England, P.O.
          Box 48, Everett, Ma 02149 - (617) 389-8300 (617) 389-8030 (fax)

1.7.8  Weekly Schedule to Users of the Harbor

     Coordination with users of the harbor is critical for a smooth operation.
     All parties should have knowledge of the others' potential activities.
     Therefore, the Contractor shall prepare a weekly schedule of dredging and
     disposal activities and forward it to the following:

     US Coast Guard Mr. Matt Stuck (617) 223-8073 (fax)

     Boston Lobstermen Mr. Bill Adler  (617) 545-7837 (fax)

     Harbormaster Mr. Erik Hahn  (617) 343-5349 (fax)

     Docking Pilots Mr. Dave Galman (617) 567-2583 (fax) Mr. Mike Duarte (617) 
     561-0813 (fax)

     Boston Pilots Mr. Art Wittamore (617) 569-4502 (fax)

     This weekly schedule shall identify all anticipated dredging and disposal 
     activities and shall be updated as appropriate.

1.8    MASSACHUSETTS DEPT OF ENVIRONMENTAL PROTECTION (MDEP) SIGN

     Massachusetts Department of Environmental Protection file number signs
     shall be displayed at the Contractor's project office site and all dredges.
     The signs shall be not less than two square feet and not more than three
     square feet in size. The words "Massachusetts Department of Environmental
     Protection", and the project File Numbers shall be neatly displayed on the
     signs. "Orders of Conditions" issued by the various project area
     Conservation Commissions are attached at the end of Section 01130
     ENVIRONMENTAL PROTECTION. Project file numbers for the various project
     areas are listed below:

          (1)  Everett:  Federal Channel 22-0037

                Distrigas of Massachusetts - 22-0039.

                Prolerized N.E. Co. - 22-0040.

          (2)  Revere Federal Channel - 061-0288.

                             SECTION 01010 Page 5
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


     (3)  Chelsea Federal Channel - 011-0054.

     (4)  Boston:

            Portions of the Federal Channel in the Reserved Channel, Inner 
          Confluence, Mystic River - 6-685.
    
            Conley Terminal Berths 11 - 17 (formerly 11 - 15) at the mouth of 
          the Reserved Channel East First Street and Farragut Road, South Boston
          - 6 -687.

          Boston Army Base 666 Summer Street, South Boston - 6-686.

          Medford Street Terminal in the Mystic River, 333 Medford 
          Street, Charlestown - 6-688.

          Morgan Terminal, 100 Terminal Street, Charlestown - 6-689.
  
          Mystic Pier, Terminal Street, Charlestown - 6-690.

          North Jetty, Northern Avenue, South Boston - 6-691.

1.9  PRECONSTRUCTION CONFERENCE
   
  The Government will conduct a preconstruction conference to inform the
  Contractor concerning the labour standards clauses, safety, environmental
  premits and other conditions of the contract.  The Contracting Officer will 
  also review the contract requirements relative to the conditions contained in
  the "Water Quality Certification" and other environmental permits issued for
  this project. It is mandatory that this preconstruction conference be attended
  by the Contractor, the Contractor's on-site construction manager, the
  Contractor's person in charge of monitoring and all other Contractor's staff
  who hold a supervisory position in the field, prior to beginning any work on
  the contract.


PART 2  PRODUCTS (NOT USED)

PART 3  EXECUTION (NOT USED)

       --End of Section--

                             SECTION 01010  Page 6
<PAGE>
 
BOSTON HARBOUR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                           SECTION TABLE OF CONTENTS

                      DIVISION 01 - GENERAL REQUIREMENTS

                                 SECTION 01025

                            MEASUREMENT AND PAYMENT


PART 1    GENERAL

     1.1  SUBMITTALS
     1.2  LUMP SUM PAYMENT ITEMS
     1.3  UNIT PRICE PAYMENT ITEMS
     1.4  BIDDING SCHEDULE - BASE BID PAYMENT ITEMS (DREDGING BOSTON HARBOUR
           CHANNELS)
       1.4.1  Item No. 0001, "Mobilization and Demobilization for Dredging
           Operations"
       1.4.2  Item No. 0002, "Mobilization and Demobilization for Blasting
           Operations"
       1.4.3  Item No. 0003, "Maintenance Dredging and Disposal"
       1.4.4  Item No. 0004, "Improvement Dredging and Disposal"
       1.4.5  Item No. 0005, "Rock Excavation from Federal Channel"
       1.4.6  Item No. 0006, "Debris Removal."
       1.4.7  Item No. 0007, "Removal and Disposal of Obstruction"
       1.4.8  Item No. 0008, "Water Quality Monitoring"
       1.4.9  Item No. 0009, "Removal of Abandoned Water Tunnel"
       1.4.10 Item No. 0010, "Bond costs"
     1.5   BIDDING SCHEDULE - ADDITIVE BID ITEMS (DREDGING AT BERTH AREAS)

PART 2 PRODUCTS (NOT USED)


PART 3 EXECUTION (NOT USED)


- -- End of Section Table of Contents --

                    SECTION TABLE OF CONTENTS 01025 PAGE 1
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


                                 SECTION 01025

                            MEASUREMENT AND PAYMENT

PART 1    GENERAL

1.1   SUBMITTALS

  Government approval is required for all submittals with a "GA" designation;
  submittals having an "FIO" designation are for information only. The following
  shall be submitted in accordance with Section 01300 SUBMITTAL PROCEDURES:

      SD-01 Data

  Weight Certificates; FIO, C reviewer.

  Submit certified weight certificates for debris removed from Boston Harbor
  under payment item "Debris Removal".

1.2   LUMP SUM PAYMENT ITEMS

  Payment items for the work of this contract for which contract lump sum 
  payments will be made are listed in the BIDDING SCHEDULE and described below.
  All costs for items of work, which are not specifically mentioned to be 
  included in a particular lump sum or unit price payment item, shall be 
  included in the listed lump sum item most closely associated with the work
  involved. The lump sum price and payment made for each item listed shall 
  constitute full compensation for furnishing all plant, labor, materials, and
  equipment, and performing any associated Contractor quality control, 
  environmental protection, meeting safety requirements, tests and reports, and 
  for performing all work required for which separate payment is not otherwise
  provided.

1.3   UNIT PRICE PAYMENT ITEMS

  Payment items for the work of this contract on which the contract unit price
  payments will be made are listed in the BIDDING SCHEDULE and described below.
  The unit price and payment made for each item listed shall constitute full
  compensation for furnishing all plant, labor, materials, and equipment, and 
  performing any associated Contractor quality control, environmental
  protection, meeting safety requirements, tests and reports, and for performing
  all work required for each of the unit price items.

1.4   BIDDING SCHEDULE - BASE BID PAYMENT ITEMS (DREDGING BOSTON HARBOR 
CHANNELS)
 
  Base Bid Payment Items for the work of this contract on which the contract
  progress payments will be based are listed in the BIDDING SCHEDULE and are 
  described below. All costs for items of work, which are not specifically
  mentioned to be included in a particular Bidding Schedule Base Bid payment
  item, shall be included in the listed item most closely associated with the
  work involved.

1.4.1     Item No. 0001, "Mobilization and Demobilization for Dredging 
Operations"

  a.  Payment will be made for costs associated with mobilization and 
  demobilization for dredging operations, as defined in Special Contract
  Requirements clause "PAYMENT FOR MOBILIZATION AND DEMOBILIZATION." Separate
  payment will be made for the mobilization and demobilization of equipment and
  materials for performing blasting operations as specified

                             SECTION 01025 Page 1
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

   below for Item No.  0002.

   b.  Unit of measure:  lump sum.

1.4.2  Item No. 0002, "Mobilization and Demobilization for Blasting Operations"

   a  Payment will be made for costs associated with mobilization and
   demobilization of equipment and materials for performing blasting operations,
   as defined in Special Contract Requirements clause "PAYMENT FOR MOBILIZATION
   AND DEMOBILIZATION." Separate payment will be made for the mobilization and
   demobilization of equipment and materials for performing dredging operations
   as specified above for Item No. 0001.

   b  Unit of measure:  lump sum.

1.4.3  Item No. 0003, "Maintenance Dredging and Disposal"

   a.  The contract price per cubic yard for "Maintenance Dredging and Disposal"
   shall include all cost of removal and disposal of all soft sediments, defined
   as silty or maintenance material, from the channels of Boston Harbor as
   specified in Section 02482 DREDGING and indicated on contract drawings.
   Permits require that all soft material, regardless of its depth or location
   in the work, be removed by an environmental bucket. Disposal includes
   construction of the in-channel disposal cells, placement of the stored silty
   sediments into the cells, placement of the silty sediments excavated from
   Boston Harbor into the cells, final capping of the cells with clean material,
   and cell thickness and coverage determination surveys and testing, all as
   specified in Section 02482 DREDGING.

   b.  For the construction of disposal cells: no separate measurement or
   payment will be made for the removal and disposal of material below the
   channel overdepth limit. The cost of removal and disposal of such material
   shall be considered incidental to maintenance dredging.

   c.  The total amount of material removed and paid for under the contract for
   this Item, will be measured by the cubic yard in place by computing the
   volume between the bottom surface shown by soundings of the last pre-dredge
   survey made immediately before dredging of the soft material and the bottom
   hard material surface shown by the soundings of a post-dredge survey made as
   soon as practicable after the removal of the soft material, including that
   within the limits of the side slopes and specified channel overdepth as
   described in Section 02482 DREDGING, paragraph OVERDEPTH AND SIDE SLOPES,
   less any deductions that may be required for misplaced material described in
   paragraph DISPOSAL OF EXCAVATED MATERIAL.

   d.  The contract price per cubic yard for dredging of the soft sediments from
   Boston Harbor channels shall include the cost of removal and disposal of all
   soft sediment materials from channel areas, as specified or indicated on the
   contract drawings. Dredging and disposal of the soft sediments from berth
   areas will be measured and paid for separately, as specified below in
   paragraph BIDDING SCHEDULE - ADDITIVE BID ITEMS (DREDGING AT BERTH AREAS).

   e.  The contract drawings listed in Special Contract Requirements, Paragraph
   "Contract Drawings, Maps and Specifications" are believed to accurately
   represent conditions existing on the date of the last survey shown on the
   drawings, but the depths shown thereon will be verified and corrected by
   soundings taken by the Government immediately before dredging. Determination
   of quantities removed and the deductions made to determine quantities after
   having once been made by the Contracting Officer, will not be reopened,
   except on evidence of collusion, fraud, or obvious error.

   f.  Monthly partial payments will be based on approximate quantities 
   determined by Contractor quality control surveys. The pre-dredge survey

                             SECTION 01025  Page 2

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


   made immediately before dredging of the soft material and the post-dredge
   survey made as soon as practicable after the removal of the soft material
   will be performed by the Government at no cost to the Contractor.

   g.  Additional Government and Contractor surveys shall be performed as
   specified in Section 02482 DREDGING for cell cap thickness and coverage
   determination.

   h.  Unit of measure:  cubic yard.

1.4.4  Item No. 0004, "Improvement Dredging and Disposal"

   a.  The contract price per cubic yard for "Improvement Dredging and Disposal"
   shall include all costs of removal and disposal of all hard material, defined
   as hard or improvement material, from Boston Harbor channels after removal
   and disposal of the overlying soft sediments material as specified in Section
   02482 DREDGING, and indicated on contract drawings. Disposal includes placing
   the hard material in scows transporting the material to the Massachusetts Bay
   Disposal Site, and depositing the material at the disposal site, as specified
   in Section 02482 DREDGING. Dredging and disposal of the hard material from
   berth areas will be measured and paid for separately, as specified below in
   paragraph BIDDING SCHEDULE - ADDITIVE BID ITEMS (DREDGING AT BERTH AREAS).

   b.  The total amount of hard material removed and paid for under the
   contract, will be measured by the cubic yard in place by computing the volume
   between the bottom surface, created after removal of the overlying soft
   sediments, as shown by soundings of the post-dredge survey made after
   removing the soft sediments and the bottom surface shown by the soundings of
   a post-dredge survey made as soon as practicable after the dredging, disposal
   and capping work has been completed, including that within the limits of the
   overdepth and side slopes described in Section 02482 DREDGING, paragraph
   OVERDEPTH AND SIDE SLOPES, less any deductions that may be required for
   misplaced material described in paragraph DISPOSAL OF EXCAVATED MATERIAL. No
   separate measurement or payment will be made for hard material removed below
   the limits of channel overdepth to create disposal cells.

   c.  The contract price per cubic yard for improvement dredging shall include
   the cost of removal and disposal of all hard materials as specified herein or
   indicated on the maps and drawings, except ledge rock, large boulders, and
   other materials, which cannot be removed without systematic drilling and
   blasting. Rock excavation will be measured and paid for as specified below
   under Item No. 0005, "Rock Excavation from Federal Channel."

   d.  Determination of quantities of improvement material removed under this
   item, and the deductions made to determine quantities, after having once been
   made by the Contracting Officer, will not be reopened, except on evidence of
   collusion, fraud, or obvious error.

   e.  Monthly partial payments will be based on approximate quantities
   determined by Contractor quality control surveys. The pre-dredge survey made
   immediately before dredging of the hard material and the post-dredge survey
   made as soon as praticable after the removal of the hard material will be
   performed by the Government at no cost to the Contractor.

   f.  Unit of measure:  cubic yard.

 1.4.5  Item No. 0005, "Rock Excavation from Federal Channel"
 
   a.  The contract price per cubic yard for rock excavation from the Federal
   Channel shall include the cost of removal and disposal of all ledge rock,
   large boulders, and other unclassified materials, which cannot be removed
   without systematic drilling and blasting. Prior to rock excavation, the
   Contractor shall remove all of the overlying material, which in the

                             SECTION 01025  Page 3

<PAGE>
 
BOSTON HARBOUR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

  judgement of the Contracting Officer can be removed by the use of the
  Contractor's plant. Rock material shall then be removed in accordance with
  Section 02491 UNDERWATER DRILLING AND BLASTING. The total amount of rock
  material removed and paid for under the contract, will be measured by the
  cubic yard in place by computing the volume between the bottom surface,
  created after removal of the overlying material, as shown by soundings of the
  post-dredge survey after removing the overlying material and the bottom 
  surface shown by the soundings of a post-dredge survey made as soon as
  practicable after dredging the rock material, including that within the limits
  of the overdepth and side slopes described in Section 02482 DREDGING,
  paragraph OVERDEPTH AND SIDE SLOPES, less any deductions that may be required
  for misplaced material described in paragraph DISPOSAL OF EXCAVATED MATERIAL.
  Disposal includes replacing the rock material in scows, transporting the
  material to the Massachusetts Bay Disposal Site, and depositing the material
  at the disposal site, as specified in Section 02491 UNDERWATER DRILLING AND
  BLASTING.

  b.  Determination of quantities of rock material removed under this item and 
  the deductions made to determine quantities after having once been made by the
  Contracting Officer, will not be reopened, except on evidence of collusion, 
  fraud, or obvious error.
  
  c.  Monthly partial payments will be based on approximate quantities 
  determined by Contractor quality control surveys. The pre-dredge survey made 
  immediately before drilling and blasting and removal of the rock material and 
  the post-dredge survey made as soon as practicable after the removal of the  
  rock material will be performed by the Government at no cost to the 
  Contractor.

  d.  Unit of measure:  cubic yard.

1.4.6  Item No. 0006, "Debris Removal."

  a.  The contract price per Ton for debris removal from Boston Harbour channels
  shall include all costs in connection with the collection, storage and 
  handling, and the removal from the site and proper disposal of debris 
  recovered from the bottom and all floating debris. Bottom debris includes 
  cables, derelict moorings, broken and abandoned pilings, line, and all objects
  which, in the opinion of the Contracting Officer, are unsuitable for placement
  in the in-channel disposal cells or the Massachusetts Bay Disposal Site. 
  Generally, all floating debris and bottom debris larger than 10 feet in any 
  dimension will be considered unsuitable for disposal in cells or ocean 
  dumping. Debris shown on the drawings as "Obstruction" will be measured and 
  paid for under Item No. 0007, "Removal and Disposal of Obstruction" below.
  
  b.  Unit of measure:  Ton (2,000) pounds).

1.4.7  Item No. 0007, "Removal and Disposal of Obstruction"

  a.  Payment will be made for all costs associated with operations necessary 
  for the location, removal and proper disposal and obstruction indicated on the
  contract drawings.

  b.  Verification of removal will be made by the Government using soundings.

  c.  Unit of measure:  One job, Lump Sum.

1.4.8  Item No. 0008, "Water Quality Monitoring"

  a.  Payment will be made for all costs associated with water quality
  monitoring in connection with Boston Harbor channel dredging operations.

  b.  Unit of measure: Lump Sum.


                             SECTION 01025 Page 4
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

1.4.9   Item No. 0009, "Removal of Abandoned Water Tunnel"

  a. Payment will be made for all costs associated with the removal of the 
  existing abandoned waterline as specified in Section 02482 DREDGING and as
  indicated on the contract drawings.

  b. Unit of Measure: One job, Lump Sum.

1.4.10  Item No. 0010 "Bond costs"

  Bond costs shall include the cost of Bid, Performance, and Payment Bonds. See
  Section 00700, Contract Clauses, clause entitled "Notice of Evaluation
  Preference for Small Disadvantaged Business Concerns -- Construction
  Acquisitions -- Test Program (Apr 1996)".

  Unit of measure: One job, Lump Sum.

1.5  BIDDING SCHEDULE - ADDITIVE BID ITEMS (DREDGING AT BERTH AREAS)

  Additive Bid Payment Items for the work of this contract on which the contract
  progress payments will be based are listed in the BIDDING SCHEDULE and are
  described below. All costs for items of work, which are not specifically
  mentioned to be included in a particular Bidding Schedule Additive payment
  item, shall be included in the listed item most closely associated with the
  work involved.

  Except as otherwise specified below, "Maintenance Dredging and Disposal" and
  "Improvement Dredging and Disposal" work at non-Federal berth areas will be
  measured and paid for in the same manner as specified above under the Base Bid
  items for Item No. 0003, "Maintenance Dredging and Disposal" and Item No.
  0004, "Improvement Dredging and Disposal."

     a.   The quantity of soft material dredged and disposed from berth areas
     will be calculated from the pier face seaward. No separate measurement or
     payment will be made for the dredging of material sloughing from adjacent
     areas. The Contractor shall estimate the quantity of material that will
     slough from adjacent areas and include the cost of dredging that material
     in the unit price bid for item "Maintenance Dredging and Disposal" for each
     berth area.

     b.   No separate measurement or payment will be made for mobilization and 
     demobilization for dredging operations at non-Federal berth areas: all such
     costs will be considered incidential to the work of dredging at berth
     areas.

     c.   No separate measurement or payment will be made for disposal of 
     dredged material from non-Federal berth areas including construction of
     disposal cells for the disposal of soft material and the disposal of hard
     material at the Massachusetts Bay Disposal Site., and depositing the
     material at the disposal site: all such costs will be considered
     incidential to the work of dredging at berth areas.

     d.   No separate measurement or payment will be made for bond costs for 
     dredging operations at non-Federal berth areas: all such costs will be
     considered incidential to the work of dredging at berth areas.
     
     e.   No separate measurement or payment will be made for the insurance 
     requirements set forth in the special Contract Requirement, which only
     apply to dredging activities to be conducted in the non-Federal berth
     areas: all such costs will be considered incidential to the work of
     dredging at berth areas.

     f.   No separate measurement or payment will be made for Debris removal 
     during dredging operations at non-Federal berth areas: all such costs will
     be considered incidential to the work of dredging at berth areas.

                             SECTION 01025 Page 5


     









<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

     g.  No separate measurement or payment will be made for water quality 
     monitoring resulting from the work at non-Federal berth areas: all such
     costs will be considered incidental to the work of dredging at berth areas.

PART 2   PRODUCTS (NOT USED)

PART 3   EXECUTION (NOT USED)

- -- End of Session --
                             
                             SECTION 01025 Page 6
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                           SECTION TABLE OF CONTENTS

                      DIVISION 01 - GENERAL REQUIREMENTS

                                 SECTION 01050

                               FIELD ENGINEERING

 PART 1  GENERAL  

  1.1   SUMMARY   
    1.1.1    Engineering Services
    1.1.2    Existing Control Points
    1.1.3    Survey Datum
  1.2   SUBMITTALS 
  1.3   LAYOUT OF WORK
  1.4   CONTRACTOR SURVEYS
    1.4.1    Personnel
    1.4.2    Survey Plans
    1.4.3    Quality Control Surveys
    1.4.4    Method of Surveying
      1.4.4.1     Soundings
  1.5   QUANTITY SURVEYS 
    1.5.1    Quantity Surveys 
    1.5.2    Government Quantity Surveys 
    1.5.3    Contractor Quantity Surveys 
    1.5.4    Field Notes
  1.6   FINAL EXAMINATION AND ACCEPTANCE
    1.6.1    Final Examination
    1.6.2    Final Acceptance
  1.7   TIDE GAGES/STAFFS/CHARTS  

 PART 2 PRODUCTS (NOT USED)

 PART 3 EXECUTION (NOT USED)

 -- End of Section Table of Contents --

                    SECTION TABLE OF CONTENTS 01050 PAGE 1

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

                                 SECTION 01050

                               FIELD ENGINEERING


PART 1   GENERAL

1.1  SUMMARY

1.1.1   Engineering Services

  The Contractor shall provide and pay for field engineering services required 
  for the project:

     a.   Survey work required in execution of this project, except for surveys 
     performed by the Contracting Officer as indicated in these specifications.

     b.   Civil, structural or other professional engineering services 
     specified, or required to execute Contractor's construction methods.

1.1.2   Existing Control Points

  The Contracting Officer will identify existing control points as required.

1.1.3   Survey Datum

  Some of the contract drawings refer to Mean Low Water (MLW) and some contract
  drawings refer to Mean Lower Water (MLLW). The Government will and the
  Contractor shall perform all surveys using the Mean Lower Low Water (MLLW)
  datum.

1.2  SUBMITTALS

  Contracting Officer approval is required for submittals with a "GA"
  designation; submittals having an "FIO" designation are for information only.
  The following shall be submitted in accordance with Section 01300 SUBMITTAL
  PROCEDURES:

     SD-01 Data

  Field Data; GA, C reviewer.

  Submit sufficient field data, including depth sounder rolls in a usable format
  and field survey notes, so that the Contractor's submittal survey plot may be
  reproduced by the Government by referring only to this field data.

     SD-01 Data

  Survey Data; GA, C reviewer.

  Submit all quality control survey data including plots. Plots shall show a
  sufficient number of soundings along each line to indicate the general shape
  of the bottom along with a schedule for correcting deficiencies. Plots shall
  be submitted no more than 2 days after completion of field work.

     SD-08 Statements

  Survey Personnel; GA; C reviewer.

  Furnish a complete listing of the personnel who will perform the survey work 
  required by the contract. The listing shall include a brief summary

                                    Page 1
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  of the hydrographic survey experience of each person. The list shall be
  submitted prior to the preconstruction conference.

     SD-01 Data

  Charts; FIO, C reviewer..

  Current and tide charts for the area(s) being dredged shall be submitted.

     SD-04 Drawings

  Survey Plans; GA, C reviewer.   

  Submit survey plans specified below.  Field surveys shall not begin until 
  these plans are approved.

1.3  LAYOUT OF WORK

  a. The Contracting Officer will furnish bench marks and horizontal control 
  points as may be required in the performance of the work.

  b. From these control points the Contractor shall lay out the work by
  establishing all lines and grades at the site necessary to control the work
  and shall be responsible for all measurements that may be required for the
  execution of the work as prescribed in the specifications and/or shown on the
  contract drawing. The Contractor shall place and establish such stakes and
  markers as may be necessary for control and guidance of his operations. All
  survey data shall be recorded in accordance with standard and approved
  methods. All field notes, sketches, recordings and computations made by the
  Contractor shall be available at all times during the progress of the work for
  ready examination by the Contracting Officer representative.

  c. The Contractor shall furnish, at his own expense, all such stakes, spikes,
  steel pins, templates, platforms, equipment, tools and material and all labor
  as may be required in laying out any part of the work from the control points
  established by the Government. It shall be the responsibility of the
  Contractor to maintain and preserve all stakes and other markers established
  by him until authorized to remove them. If any of the control points
  established at the site by the Government are destroyed by or through the
  negligence of the Contractor prior to their authorized removal, the points 
  will be replaced by the Government. The expense of replacement will be
  deducted from any amount due or which may become due the Contractor. The
  Contracting Officer may require that the work be suspended at any time when
  horizontal and vertical control points established at the site by the
  Contractor are not reasonably adequate to permit checking the work. Such
  suspension will be withdrawn upon proper replacement of the control points.

  d. In order to facilitate approximate positioning of the dredging plant, the
  Contractor shall have painted or welded marks placed at 10 foot intervals
  along all four sides of the deck of the dredging plant.

1.4  CONTRACTOR SURVEYS

1.4.1  Personnel

  The Contractor survey work to be performed under this contract shall be
  accomplished by, and/or reviewed and approved by a surveyor familiar with and
  having personal experience with hydrographic surveys. In addition, the survey
  personnel shall also be familiar with and have personal experience with
  hydrographic surveys.

1.4.2  Survey Plans

  Prior to the start of any work at the site, the Contractor shall prepare a  

                             SECTION 01050 Page 2

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  plan describing the survey method(s) to be used:

          a. to complete the layout and sequencing of the work
          b. to conduct the progress surveys
          c. to conduct the quality control surveys

1.4.3   Quality Control Surveys

  The Contractor shall examine his work by conducting hydrographic surveys at no
  more than 30-day intervals, upon completion of separable portions of the work,
  and upon completion of the entire work. The Contractor shall prepare survey
  maps based on the results of these surveys. These maps shall be used, by the
  Contractor, to satisfy himself of the effectiveness of his operations.
  Particular attention shall be directed to attainment of contract depth and
  comparison of actual progress and in-place quantities dredged with scheduled
  progress. Contractor surveys will not be used for final payment or acceptance.
  See Section 02482 DREDGING for additional Contractor survey requirements
  relative to disposal cell construction.

1.4.4     Method of Surveying

1.4.4.1   Soundings

  To assure that the method of surveying is acceptable, the Contractor shall 
submit, as part of the Quality Control Plan a detailed proposal setting out the
proposed method of surveying. Soundings shall be referred to Mean Lower Low
Water (MLLW) and shall be performed with a depthsounder having a vertical
accuracy of 0.1 foot. In general, sounding lines shall be perpendicular to the
channel limits and shall extend a minimum of 3 times the channel depth outsidd
of the limits except where limited by the surrounding topography or lack of
sufficient depth for the survey boat. For the first disposal cell, the range of
the Contractor survey shall be 1 barge length (up to 300 feet) beyond the
perimeter of the cells. For subsequent cells, the range of the contractor survey
will be at least 50 feet beyond the perimeter of the cell. The interval between
sounding lines shall be a maximum of 50 feet. Control points used for the
surveys shall be occupied and proven by checking reference angles in the field.
Depth measuring equipment must use a recording depthsounder with a transducer
beam angle not exceeding 8 degrees. Horizontal positioning systems shall be a
Differential Global Positioning System (DGPS). Whatever system is used shall be
capable of locations accurate to 1 meter or better of the true position. At the
start of each day's soundings, following any lengthy breaks and at the end of
the day's soundings a bar check shall be taken within two feet of the project
depth and recorded on the depthsounder roll. Events marks shall be marked and
titled on depthsounder rolls. Sounding lines shall be numbered on the
depthsounder rolls and plots. Events marks shall correlate horizontal position
with depth and shall be marked and numbered on depthsounder rolls. They shall be
taken at 30 second intervals. The Contractor will be required to submit to the
Contracting Officer sufficient field data, including depthsounder rolls in a
usable format, corrected for tide, and corresponding boat plots and track
sheets, so that the Contractor's submitted survey plot may be reproduced by the
Government by referring only to this field data. After completion of the
Contractor's survey, the results will be plotted and reviewed by the Contractor
to insure that all work was completed in accordance with contract requirements
and submitted to the Contracting Officer on a floppy disk in ASCII format. A re-
survey of the area after correction of deficiencies will be required to assure
that correction has been achieved. Upon completion of the project sufficient
surveys will have been performed and plots submitted to assured that the proper
depth has been achieved throughout the entire project. Submission of all
Contractor quality control survey data, including plots, is required prior to
performance of final examination and acceptance surveys by the Government. The
results of quality control survey should be utilized by the Contractor to ensure
that work was performed in accordance with contract requirements. Final
acceptance by

                             SECTION 01050 Page 3
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

     the Contracting Officer will be in accordance with SECTION 01025
     MEASUREMENT AND PAYMENT of these specifications.

     Automated electronic sweeping shall be preformed by the Contractor for all
     completed areas of improvement dredging. All of the sweep data shall be
     submitted on 3-1/2 inch floppy disks with X,Y and Z ASCII files containing
     Easting, Northing, and true Elevations, decimated by shoalest soundings in
     a 25 foot grid pattern. The files shall be positioned on NAD Mass Mainland
     Zone (2001 NAD 1927) and datum referenced to MLLW.

1.5 QUANTITY SURVEYS

1.5.1  Quantity Surveys

  Quantity surveys shall be conducted, and the data derived from these
  surveys shall be used in computing the quantities of work performed or
  finally in place.

1.5.2  Government Quantity Surveys

  The Contracting Officer will conduct the original and final surveys for
  Boston Harbor channels, berth areas, and the disposal cells and make all
  quantity computations based on those surveys. The surveys will be performed
  at no expense to the Contractor, except as noted in Article "Final
  Examination and Acceptance" below and as specified in Section 02482
  DREDGING. All surveys by the Government will be performed using "Multibeam"
  survey equipment. The Contractor shall give a minimum of 3 days notice
  before completion of a portion of the work requiring a post-dredge survey.
  A minimum of 2 days will be required by the Government for completion of
  each of the post-dredge surveys at the site and another 10 to 15 days for
  calculation of quantities removed and verification of completion of work.

1.5.3  Contractor Quantity Surveys

  The Contractor shall conduct the surveys for any periods for which progress
  payments are requested. The Contractor will make the computations based on
  these surveys. All surveys accomplished by the Contractor shall be
  conducted under the direction of the Contracting Officer, unless the
  Contracting Officer waives this requirement for each specific instance. The
  Contractor shall also perform an electronic sweep of all improvement
  dredging areas and furnish the sweep data to the Contracting Officer.

  Additional Government and Contractor surveys shall be performed as
  specified in section 02482 DREDGING for cell cap thickness and coverage
  determination.

1.5.4  Field Notes

  Promptly upon completing a survey, the Contractor shall furnish the
  originals of all field notes and all other records relating to the survey
  to the Contracting Officer, who shall use them as necessary to determine
  the amount of progress payments. The Contractor shall retain copies of all
  such material furnished to the Contracting Officer.

1.6  FINAL EXAMINATION AND ACCEPTANCE

1.6.1  Final Examination

  As soon as practicable after the completion of the entire work and after
  examination by the Contractor using electronic sweep equipment for full
  coverage of the entire work area, the work will be thoroughly examined by
  the Contracting Officer. Examinations by the Contracting officer will be

                             SECTION 01050  Page 4

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BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

     made at the expense of the Government by soundings or full coverage
     electronic sweeping operations, or both, as determined by the Contracting
     Officer. Should any shoals or other lack of contract depth be disclosed by
     this examination, the Contractor shall remove these shoals by dredging,
     at the contract rate, or by otherwise removing the shoals, as directed by
     the Contracting Officer. The Contractor or his authorized representative
     will be notified if and when soundings and/or sweeps are to be made. One
     individual will be allowed to accompany the survey party during the final
     examination survey(s). When the area is found to be satisfactorily cleared,
     it will be accepted finally. Should more than one final examination survey
     of an area be required, the cost of all additional surveys of that area
     will be deducted from amounts due or to become due the Contractor. These
     survey costs will be based upon a rate of $2,400.00 per day for each day in
     which the Contracting Officer survey plant is engaged in sounding or
     sweeping operations, and/or is en route to or from the site, or held at or
     near the site for such operations.

   1.6.2     Final Acceptance

     Final acceptance of the whole or any part of the work, and the deductions
     or corrections of deductions made thereon will not be reopened after having
     once been made, except on evidence of collusion, fraud, or obvious error.


   1.7  TIDE GAGES/STAFFS/CHARTS

     Contractor shall set a minimum of two standard tide boards within site of
     the dredge operator. Tide board elevations will be set to proper elevations
     by surveying using only previously established vertical datum issued by the
     U.S. Army Corps of Engineers. All tide boards will be set to the correct
     Corps of Engineers reference datum for this project. Tide boards shall be
     maintained for the duration of the dredging project. Current and tide
     charts for the area(s) being dredged for the duration of the project shall
     be submitted by the Contractor and shall be available on site.

   PART 2 PRODUCTIONS (NOT USED)

   PART 3 EXECUTION (NOT USED)

          -- End of Section --

                             SECTION 01050 Page 5 

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BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


                           SECTION TABLE OF CONTENTS

                      DIVISION 01 - GENERAL REQUIREMENTS

                                 SECTION 01130

                           ENVIRONMENTAL PROTECTION


PART 1  GENERAL

  1.1   REFERENCES
  1.2   DEFINITIONS
  1.3   SUBMITTALS
  1.4   ENVIRONMENTAL PROTECTION REQUIREMENTS
    1.4.1   Protection of Features
    1.4.2   Permits
    1.4.3   Special Environmental Requirements
      1.4.3.1  Independent Observer (I/O)
      1.4.3.2  Fisheries Observer
      1.4.3.3  Marine Mammal Observer
    1.4.4   Environmental Assessment of Contract Deviations
  1.5   ENVIRONMENTAL PROTECTION PLAN
    1.5.1   List of Federal, State, and Local Laws and Regulations
    1.5.2   Spill Control Plan
    1.5.3   Contaminant Prevention Plan
    1.5.4   Environmental Monitoring
    1.5.5   Protection of Fish and Wildlife Resources

PART 2  PRODUCTS (NOT USED)

PART 3  EXECUTION

  3.1   SPECIAL ENVIRONMENTAL PROTECTION REQUIREMENTS
    3.1.1   Commercial Borrow
    3.1.2   Disposal of Solid Wastes
    3.1.3   Disposal of Contractor Generated Hazardous Wastes
    3.1.4   Fuels and Lubricants
  3.2   HISTORICAL, ARCHAEOLOGICAL, AND CULTURAL RESOURCES
    3.2.1      Discovered Historic, Archaeological, and Cultural Resources
  3.3   PROTECTION OF WATER RESOURCES
  3.4   PROTECTION OF AIR RESOURCES
    3.4.1      Particulates
  3.5   INSPECTION
  3.6   MAINTENANCE OF POLLUTION CONTROL FACILITIES
  3.7   TRAINING OF CONTRACTOR PERSONNEL

 --End of Section Table of Contents--

                    SECTION TABLE OF CONTENTS 01130 PAGE 1


<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

                                 SECTION 01130

                           ENVIRONMENTAL PROTECTION


PART 1  GENERAL

1.1 REFERENCES

  The publications listed below form a part of this specification to the extent
  referenced. The publications are referred to in the text by basic designation 
  only.

      CODE OF FEDERAL REGULATIONS (CFR)

  40 CFR 261                      Identification and listing of Hazardous Waste

      ENGINEERING MANUALS (EM)

  EM 385-1-1                      (1996) U.S. Army Corps of Engineers Safety and
                                  Health Requirements Manual

1.2  DEFINITIONS

  Environmental pollution and damage is defined as the presence of chemical,
  physical, or biological elements or agents that adversely affect human health
  or welfare; unfavorably alter ecological balances of plant or animal
  communities; or degrade the environment from an aesthetic, cultural or
  historic perspective. Environmental protection is the prevention/control of
  pollution and habitat disruption that may occur during construction. The
  control of environmental pollution and damage requires consideration of air,
  water, land. biological and cultural resources; and includes management of
  visual aesthetics; noise; solid, chemical, gaseous, and liquid waste; radiant
  energy and radioactive materials; and other pollution.

1.3  SUBMITTALS

  Government approval is required for submittals with a "GA" designation;
  submittals having an "FIO" designation are for information only. The
  following shall be submitted in accordance with Section 01300 SUBMITTAL
  PROCEDURES:

     SD-01 Data

  Fish Startle Equipment and Sonar; GA, E reviewer.

  Submit for review and approval sufficient data showing compliance with
  specification requirements.

     SD-08 Statements
  
  Fisheries Observer; GA, E reviewer.

  Submit for review and approval the name and qualifications of the Fisheries
  Observer. Prevent evidence that the Fisheries Observer is acceptable to the
  Massachusetts Division of Marine Fisheries and the National Marine Fisheries
  Service.

     SD-08 Statements

  Marine Mammal Observer; GA, E reviewer.

                             SECTION 01130 Page 1











      


  

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BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

     
  Submit for review and approval the name and qualifications of the Marine
  Mammal Observer. Present evidence that the Marine Mammal Observer meets the
  qualifications as specified in the "Conditions Recommended be the National
  Marine Fisheries Service for Projects Funded or Undertaken by the Corps of
  Engineers that Include Disposal of Dredged Material at the Corps of Engineers
  that Include Disposal of Dredged Material at the Massachusetts Bay Disposal
  Site" attached at the end of this section.

1.4       ENVIRONMENTAL PROTECTION REQUIREMENTS
 
  The Contractor shall comply with all applicable Federal, State, and local
  laws, regulations and permits. The Contractor shall provide environmental
  protective measures and procedures to prevent and control pollution, limit
  habitat disruption, and correct environmental damage that occurs during
  construction

1.4.1     Protection of Features

  The Contractor shall protect all environmental features indicated in permits
  and in these contract documents in spite of interference which their
  preservation may cause to the Contractor's work under the contract.

1.4.2     Permits

  This section supplements the Contractor's responsibility under the contract
  clause PERMITS AND RESPONSIBILITIES to the extent that the Government has
  already obtained the listed environmental permits issued for the Boston Harbor
  Navigation Improvement Project. A Water Quality Certification (WQC) issued by
  the Massachusetts Department of Environmental Protection; Coastal Zone
  Consistency Determination; U.S. Army Corps of Engineers permits (to be added
  by an amendment to this solicitation); MEPA; Ch 91 (Pending); and various
  "Order of Conditions" issued by the Boston, Everett, Revere, and Chelsea
  Conservation Commissions have been obtained for this project. The Contractor
  shall comply with permit terms and conditions that are applicable to this
  contract. Such applicable terms and conditions have been extracted from the
  permits and are specified in the various sections of these specifications and
  on the contract drawings. The above referenced documents shall not be relied
  on for contract requirements. In the event a discrepancy is discovered between
  the reference documents and these specifications or the contract drawings, the
  Contracting Officer will rely on permit requirements and conditions to resolve
  perceived conflicts. Copies of the WQC and various "Order of Conditions"
  issued by the Boston Conservation Commission and other affected communities
  obtained for this project are included at the end of this section for
  reference only.

1.4.3     Special Environmental Requirements

  The Contractor shall comply with the special environmental requirements
  included below. These special environmental requirements are an outgrowth of
  environmental commitments made by the Government during the project
  development.

1.4.3.1   Independent Observer (I/O)

  The Government will provide the services of an Independent Observer (I/O). The
  I/O will be responsible for reporting project activities to the Executive
  Office of Environmental Affairs and a Technical Advisory Committee. Funding of
  the I/O will be the Government's responsibility, The Contractor shall
  coordinate and discuss his work operations with the Contracting Officer on a
  daily basis who will coordinate and discuss those operations with the I/O. The
  Contractor shall provide the I/O with transportation to and from the dredge(s)
  and access to materials and equipment necessary in the performance of his
  duties.

1.4.3.2   Fisheries Observer

                             SECTION 01130 Page 2
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

   The Contractor shall provide the services of a Fisheries Observer with
   qualifications acceptable to the Massachusetts Division of Marine Fisheries
   and the National Marine Fisheries Service. The Fisheries Observer will be
   responsible for prohibiting blasting operations during the passage of schools
   of fish and other duties as specified, including performing marine mammal
   observer duties in the absence of the Marine Mammal Observer. Funding of the
   Fisheries Observer shall be the Contractor's responsibility. The Fisheries
   Observer shall be approved by the Contracting Officer. The Contractor shall
   provide sonar equipment and fish startle equipment for the exclusive use of
   the Fisheries Observer for performing dredging operations at the specific
   locations and time periods specified in Section 02482 DREDGING.

       Sonar (hydroacoustic monitoring equipment) shall be a side-scan type,
     which can provide a low target recognition value, distance to fish,
     determine the direction the fish are traveling, and provide a record of the
     information collected on a tape or disk.

       Fish startle equipment shall be capable of deterring fish from the family
     Cupeidae (blueback herring, alewife) using high amplitude sound at specific
     --------
     frequencies. The equipment shall be similar or approved equal to Electronic
     Fish Startle System (EFSS) by Sonalysts, Inc., 215 Parkway North,
     Waterford, CT.

1.4.3.3   Marine Mammal Observer

   The Contractor shall provide the services of a Marine Mammal Observer with
   qualifications and duties as specified in the "Conditions Recommended by the
   National Marine Fisheries Service for Projects Funded or Undertaken by the
   Corps of Engineers that Include Disposal of Dredged Material at the
   Massachusetts Bay Disposal Site" attached at the end of this section. The
   Marine Mammal Observer will be responsible for prohibiting harassment of
   marine mammals and sea turtles during disposal operations. Funding of the
   Marine Mammal Observer shall be the Contractor's responsibility. The Marine
   Mammal Observer shall be approved by the Contracting Officer.

1.4.4     Environmental Assessment of Contract Deviations

   The contract specifications have been prepared to comply with the permit
   conditions and all special conditions and mitigation measures of an
   environmental nature which were established during the planning and
   development of this project. The Contractor is advised that deviations from
   the drawings or specifications (e.g., disposal areas, staging areas,
   alternate access routes, etc.) could result in the requirement for the
   Government to reanalyze the project from an environmental standpoint.
   Deviations from the construction methods and procedures indicated by the
   plans and specifications which may have an environmental impact will require
   a review, processing, and approval time by the Government. The Government
   reserves the right to disapprove alternate methods, even if they are more
   cost effective, if the Government determines that the proposed alternate
   method will have an adverse environmental impact or unreasonable delay.

1.5       ENVIRONMENTAL PROTECTION PLAN

   Within 20 calendar days of Notice of Award, the Contractor shall submit an
   Environmental Protection Plan for review and acceptance by the Contracting
   Officer. Acceptance is conditional and is predicated upon satisfactory
   performance during construction. The Contracting Officer reserves the right
   to require the Contractor to make changes in the Environmental Protection
   Plan or operations if the Government determines that environmental protection
   requirements are not being met. The plan shall detail the actions which the
   Contractor shall take to comply with all applicable Federal, State, and local
   laws, regulations and permits

                             SECTION 01130 Page 3
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

   concerning environmental protection and pollution control and abatement, as
   well as the additional specific requirements of this contract. No physical
   work at the site shall begin prior to acceptance of the Contractor's plan.
   The environmental protection plan shall include, but not be limited to, the
   following:

1.5.1   List of Federal, State, and Local Laws and Regulations

   The Contractor shall provide as part of the Environmental Protection Plan a
   list of all Federal, State, and local environmental laws and regulations
   which apply to the construction operations under the contract.

1.5.2   Spill Control Plan

   The Contractor shall include as part of the environmental protection plan, a
   Spill Control Plan. The plan shall include the procedures, instructions, and
   reports to be used in the event of an unforeseen spill of a substance
   regulated by the Emergency Response and Community Right-to-Know Act or
   regulated under State or local laws or regulations. The Spill Control Plan
   supplements the requirements of EM 385-1-1, and shall also conform to
   requirements located in SECTION 01135 WATER QUALITY MONITORING. This plan
   shall include as a minimum:

       a.  The name of the individual who will be responsible for implementing 
       and supervising the containment and cleanup.

       b.  Training requirements for Contractor's personnel and methods of 
       accomplishing the training.

       c.  A list of materials and equipment to be immediately available at the 
       job site, tailored to cleanup work of the potential hazard(s) identified.
       The list shall include an emergency fuel boom to be stored on site for
       deployment in the event of any water spillage cause by any equipment

       d.  The names and locations of suppliers of containment materials and 
       locations of additional fuel oil recovery, cleanup, restoration, and
       material-placement equipment available in case of an unforeseen spill
       emergency.

       e.  The methods and procedures to be used for expeditious contaminant 
       containment and cleanup.

       f.  The name of the individual who will report any spills or hazardous 
       substance releases and who will follow up with complete documentation.
       This individual shall immediately notify the Contracting Officer in
       addition to the legally required Federal, State, and local reporting
       channels (including the National Reponse Center 1-800-424-8802) if a
       reportable quantity spill occurs. The plan shall contain a list of the
       required reporting channels and telephone numbers.

1.5.3   Contaminant Prevention Plan

   As a part of the Environmental Protection Plan, the Contractor shall prepare
   a contaminant prevention statement identifying potentially hazardous
   substances to be used on the job site and intended actions to prevent
   accidental or intentional introduction of such materials into the air, water,
   or ground. The Contractor shall detail provisions to be taken to meet
   Federal, State, and local laws and regulations regarding the storage and
   handling of these materials.

1.5.4   Environmental Monitoring

   The Contractor shall include in the plan the details of environmental 
   monitoring requirements under the applicable laws, regulations and permits,

                             SECTION 01130 Page 4

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

   as specified in these specifications, and a description of how this
   monitoring will be accomplished. See also Section 01135 WATER QUALITY
   MONITORING AND CONTROL.

1.5.5   Protection of Fish and Wildlife Resources

   The Contractor shall prepare and submit a "Fish Detection and Protection
   Plan" and a "Marine Mammal Protection Plan" as part of the Environmental
   Protection Plan. The plans shall include the names and qualifications of the
   designated observers, as well as specific details regarding protection of
   fish and wildlife resources during the work, including the type of fish
   deterrent system that will be used. If at any time during the implementation
   of the project, a significant fish kill or significant water quality problem
   occurs, and can be attributed to the project, all site activities impacting
   the water shall follow the Contractor's approved contingency plan, as
   discussed in Section 01135 WATER QUALITY MONITORING AND CONTROL, or shall
   cease until the source of the problem is identified. Adequate mitigating
   measures shall be followed as outlined in the contingency plan or upon
   discussion with the appropriate state and local agencies. The Contractor
   shall also comply with all aspects of the "Legal Requirements for operation
   of any vessel around North Atlantic Right Whales;" and other requirements
   relative to the protection of marine mammals attached at the end of this
   section. See also section 02491 UNDERWATER DRILLING AND BLASTING for
   additional requirements for the protection of fish and wildlife to be
   included in the plans.

PART 2  PRODUCTS (NOT USED)

PART 3  EXECUTION

3.1  SPECIAL ENVIRONMENTAL PROTECTION REQUIREMENTS

3.1.1   Commercial Borrow

   Prior to bringing commercially obtained borrow material onsite, the 
   Contractor shall provide the Contracting Officer with the location of the pit
   or pits, the names of the owners and operators, and the types and estimated
   quantities of materials to be obtained from each source. Additional capping
   material requirements are included in Section 02482 DREDGING.

3.1.2   Disposal of Solid Wastes

   Solid waste is rubbish, floating and bottom debris, waste materials, garbage,
   and other discarded solid materials (excluding hazardous waste as defined in
   following paragraphs). Solid waste shall be placed in containers and disposed
   on a regular schedule. All handling and disposal shall be conducted in such a
   way as to prevent spillage and contamination. The Contractor shall transport
   all solid waste off Government property and dispose in compliance with
   Federal, State, and local requirements and permits. The Contractor shall
   submit to the Contracting Officer a "Solid Waste Management Plan" or "Debris
   Management Plan" as part of the Environmental Protection Plan. Additional
   requirements for debris management to be included in the plan are located in
   Sections 01135 WATER QUALITY MONITORING AND CONTROL and 02482 DREDGING

3.1.3   Disposal of Contractor Generated Hazardous Wastes

   Hazardous wastes are hazardous substances as defined in 40 CFR 261, or as
   defined by applicable State and local regulations. Hazardous waste generated
   by construction activities shall be removed from the work area and be
   disposed in compliance with Federal, State, local requirements and permits.
   The Contractor shall segregate hazardous waste from other materials and
   wastes, and shall protect it from the weather by placing it in a safe covered
   location; precautionary measures against accidental

                             SECTION 01130 Page 5
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  spillage such as berming or other appropriate measures shall be taken.
  Hazardous waste shall be removed from Government property within 60 days.
  Hazardous waste shall not be dumped onto the ground, into storm sewers or open
  water courses, or into the sanitary sewer system.

3.1.4   Fuels and Lubricants

  Fueling and lubrication of equipment and motor vehicles shall be conducted in
  a manner that affords the maximum protection against spills and evaporation.
  Daily inspections of fuel and lubrication systems shall be made for leakage.
  All leakage discovered by the inspection shall be repaired outside of the
  resource area and the established buffer zone. Lubricants and waste oil to be
  discarded shall be stored in marked corrosion-resistant containers and
  recycled or disposed in accordance with Federal, State, and local laws,
  regulations, and permits.

3.2     HISTORICAL, ARCHAEOLOGICAL, AND CULTURAL RESOURCES

3.2.1   Discovered Historic, Archaeological, and Cultural Resources

  If during construction activities, items are observed that may have historic
  or archaeological value (e.g., Native American human remains or associated
  objects are discovered), such observations shall be reported immediately to
  the Contracting Officer so that the appropriate authorities may be notified
  and a determination made as to their significance and what, if any, special
  disposition of the finds should be made. The Contractor shall cease all
  activities that may result in impact to or the destruction of these resources.
  The Contractor shall prevent his employees from trespassing on, removing, or
  otherwise disturbing such resources.

3.3     PROTECTION OF WATER RESOURCES

  The Contractor shall keep construction activities under surveillance,
  management, and control to avoid pollution of surface and ground waters.

3.4     PROTECTION OF AIR RESOURCES

  Special management techniques as set out below shall be implemented to control
  air pollution by the construction activities. These techniques supplement the
  requirements of Federal, State, and local laws and regulations; and the safety
  requirements under this Contract. If any of the following techniques conflict
  with the requirements of Federal, State, or local laws or regulations, or
  safety requirements under this contract, then those requirements) shall be
  followed in lieu of the following.shall be followed in lieu of the following.

3.4.1   Particulates

  Airborne particulates, including dust particles, from construction activities
  and processing and preparation of materials shall be controlled at all times,
  including weekends, holidays, and hours when work is not in progress. The
  Contractor shall maintain all excavations, stockpiles, haul roads, plant
  sites, disposal sites, borrow areas, and all other work areas free from
  airborne dust which would cause a hazard or nuisance.

3.5     INSPECTION

  If the Contracting Officer notifies the Contractor in writing of any observed
  noncompliance with contract requirements or Federal, State, or local laws,
  regulations, or permits, the Contractor shall inform the Contracting Officer
  of proposed corrective action and take such action to correct the
  noncompliance. If the Contractor fails to comply promptly, the Contracting
  Officer may issue an order stopping all or part of the work until satisfactory
  corrective action is taken. No time extensions will be granted or costs or
  damages allowed to the Contractor for any such suspension.

                             SECTION 01130 Page 6

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BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


3.6  MAINTENANCE OF POLLUTION CONTROL FACILITIES
  
  The Contractor shall maintain all constructed pollution control facilities and
  portable pollution control devices for the duration of the contract or for the
  length of time construction activities create the particular pollutant.

3.7  TRAINING OF CONTRACTOR PERSONNEL

  Contractor personnel shall be trained in environmental protection and
  pollution control. The Contractor shall conduct environmental
  protection/pollution control meetings for all Contractor personnel monthly.
  The training and meeting agenda shall include methods of detecting and
  avoiding pollution, familiarization with pollution standards, both statutory
  and contractual, installation and care of facilities (vegetative cover, etc.),
  and instruments required for monitoring purposes to ensure adequate and
  continuous environmental protection/pollution control. Anticipated hazardous
  or toxic chemicals or wastes, and other regulated contaminants, shall also be
  discussed. Other items to be discussed shall include recognition and
  protection of archaeological sites and artifacts.

                                END OF SECTION

                             SECTION 01130  Page 7
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                                  ATTACHMENTS

 BOSTON HARBOR FISHERIES (AND MARINE MAMMAL) OBSERVER CRITERIA

 The fisheries observer should have an educational background in marine biology,
 general experience aboard dredges, and hands on field experience with
 Massachusetts marine fish species. A person who does not have a college degree
 in marine biology or related field may be qualified as an observer if s/he has
 field experience with fisheries, sonar, and fish startle systems..

     1.   Education: College degrees (B.S. or higher) in marine biology or 
     related field.

     2.   Field Experience and Equivalents:

               a.   Documented field research focused on Massachusetts marine 
          fish species or its habitat OR has worked at least two years on a
          commercial fishing vessel identifying and locating at least two of the
          following fish species, rainbow smelt, alewife, blueback herring,
          menhaden, winter flounder, and striped bass, using sonar AND

               b.   Has at least one month of work experience with a fish
          startle system.

     3.   Dredge Experience; Experience in any capacity aboard dredges of the
     same type as those to be used in the proposed project, would be helpful.

     4.   Skill Set - Observers must be able to:

               a.   identify the following six species; rainbow smelt (Osmerus
          mordax), alewife (Alosa pseudoharengus), blueback herring (Alosa
                            --------------------                     -----
          aestivailis), menhaden (Brevoortia tyrannus), winter flounder
          -----------             -------------------
          (Pseudoplenectes americanus), and striped bass (Morone saxatilis).
           --------------------------                     ----------------

               b.   take standard field measurements (total length and weight or
          fish killed by blasting (i.e. floating at the surface), if more than a
          few dozen fish. If hundreds or thousands of fish are killed, then
          representative samples will be taken.

               c.   run the fish startle system and observe and record the 
          behavior of fish before and during use of the fish startle system.

               d.   observe fish patterns and any marine mammals (such as harbor
          porpoises and seals) in the area, and advise dredge and disposal
          operators on the appropriate blast timing to avoid impacting these
          biological resources.

               e.   provide a summary report of data collected on fish behavior,
          before and during the use of the fish startle system, results of fish
          killed (including species, length, and weight) during blasting, and
          observations of marine mammals to dredging and blasting operations.

                             SECTION 01130 Page 8
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

CONDITIONS RECOMMENDED BY THE NATIONAL MARINE FISHERIES SERVICE FOR PROJECTS 
FUNDED OR UNDERTAKEN BY THE CORPS OF ENGINEERS THAT INCLUDE DISPOSAL OF DREDGED 
MATERIAL AT THE MASSACHUSETTS BAY DISPOSAL SITE 

                                March 27, 1997

(1) From February 1 through May 30 of any year, disposal vessels including tugs,
barges, and scows transiting between the dredge site and the Massachusetts Bay 
Disposal Site shall operate at speeds not to exceed 5 knots after sunset, before
sunrise, or in daylight conditions where visibility is less than one nautical 
mile. Disposal shall not proceed if these requirements cannot be met due to 
weather or sea conditions. In that regard, the vessel captain and/or contractor 
should be aware of predicted conditions before departing for the disposal site. 
The intent of this condition is to reduce the potential for vessel collisions 
with threatened and endangered species, including right whales.

(2) From February 1 through May 30 of any year, an approved marine observer 
(i.e., meeting the attached National Marine Fisheries Service (NMFS) criteria on
observer qualifications, including the specified skill sets for sea turtles and 
whales) must be present aboard disposal vessel transiting between the dredge 
site and the Massachusetts Bay Disposal Site during daylight hours. When 
threatened or endangered species are observed to be present, the vessel captain 
shall, except when precluded by safety considerations, follow the advice of the 
marine mammal observer to avoid harassment of or direct impact to individual 
animals. The observer shall fully complete a separate Corps of Engineers marine 
mammal observation report for every sighting and shall ensure that this report 
is received by the Corps New England District, Environmental Resources Section 
(fax number (978) 318-8560) and The Regulatory Compliance Branch (fax number 
(978) 318-8303) within one week of the trip date. The observer shall maintain 
contact with the NMFS (Habitat and Protected Resource Division, phone number 
(508) 281-9328) and other recognized experts to provide and receive information 
regarding the presence and distribution of threatened and endangered species in 
Massachusetts Bay. All right whale sightings (including location) shall be 
reported to Ms. Pat Genior at NMFS Woods Hole (telephone number (508) 495-2264) 
at the end of the day. The intent of this condition is to reduce the potential 
for vessel collisions with threatened and endangered species, including right 
whales, and to minimize potential impacts of dredged material disposal on 
threatened and endangered species.

Marine mammal observers shall use the following guidelines to minimize conflicts
with threatened or endangered species:

(a)  A marine mammal observer shall be posted on lookout at all times during 
daylight hours when disposal vessels have left the harbor and are underway or at
the disposal site.

(b)  Disposal vessels shall not approach threatened or endangered species closer
that 100 feet (see additional condition below for approaching right whales).

(c)  Disposal vessels shall adhere to the attached NMFS regulations for 
approaching right whales, 50 CFR Part 222.32, which restrict approaches within 
500 yards of a right whale and specify avoidance measures for vessels that 
encounter right whales.

(d)  If threatened or endangered species are sighted within 500 feet from the 
disposal point, dredged material shall not be released. In this case, the vessel
captain may elect to wait until the animals move away from the disposal point 
prior to disposal, or, subject to the judgement of the observer, may dispose at 
an authorized alternative disposal location under the same restrictions noted 
herein for disposal at the primary disposal

                             SECTION 01130 Page 9
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

  location.

  (e)  If threatened or endangered species are sighted between 500 feet and 1500
  feet from the disposal point, the observer shall note the animal's behavior,
  relative position, and direction and speed of movement to determine if release
  of dredged material is likely to harass or endanger the animals. For example,
  whales actively feeding at or near the disposal point are more likely that
  resting whales to interact with released sediments. If the observer judges
  that disposal is likely to harass or endanger the animals, the observer shall
  inform the vessel captain and disposal shall be delayed until the animals
  change their behavior or move away such that the observer judges that no
  danger to the animals will result from disposal.
  
  OBSERVER CREDENTIALS

  Certain credentials and experience might indicate an observer has the skills
  listed below. Ideally, the applicant will have an educational background in
  marine biology, general experience aboard dredges, and hands on field
  experience with the species of concern.

  A person who does not have a college degree in marine biology or a related
  field may be qualified as an observer if she/he has successfully completed an
  approved endangered species dredge observer training program (item 3a), and
  has twice the experience identified as necessary in items 2b, 3c, and 3d.

  1. EDUCATION: College degree (BS or higher) in marine biology or a related 
  field, and 

  2. DREDGE/FLOAT EXPERIENCE:

  a) For shortnose sturgeon or sea turtle observers: Work for a minimum or one 
  week in any capacity aboard dredges of the same type as those to be used in
  the proposed project, or

  b) For large whale observers: Work for a minimum of two months as a naturalist
  or wildlife guide aboard an active whale watch vessel or other vessel
  primarily engaged in the observation of large whales in the wild, and

  3. FIELD EXPERIENCE AND EQUIVALENTS

  a) Successful completion of an approved endangered species dredge observer 
  training course, or

  b) Documented field research focused on the species or its habitat, or 

  c) Work for a minimum of four months as an endangered species 
  observer-in-training aboard dredges that have interacted with the species in
  question, or

  d) Active involvement for a minimum of one year in organized responses to
  protected species stranding events where sea turtles and marine mammals are
  identified and handles.

  Note: If dredge operations are likely to interact with more than one group of
  protected species, the observer must demonstrate that he/she has all of the
  respective skill sets.

  4. SKILLS SETS

  a) Observers must be able to identify sea turtle species.

  b) Observers must be able to advise dredge operators on the appropriate
  maneuvering to avoid harassing or impacting sea turtles.

                             SECTION 01130 Page 10

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

     c)   Observers must be able to indentify endangered whale species that may
     be encountered during project operations.

     d)   Observers must be able to discern whale behaviors, such as milling, 
     traveling, and feeding.

     e)   Observers must be able to demonstrate knowledge of individually 
     distinctive markings on humpback and right whale for indentification
     purposes.

                      
                             SECTION 01130 Page 11

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


     
  I.  Legal Requirements for operation of any vessel around North Atlantic 
  Right Whales:

  50 CFR Parts 217 and 222
  222.32 Approaching North Atlantic Right Whales

  (a) Prohibitions. Except as provided under paragraph (c) of this section, it
  is unlawful for any person subject to the jurisdiction of the United States to
  commit, attempt to commit, to solicit another to commit, or cause to be
  committed any of the following acts:

  (1) Approach (including by interception) within 500 yards (460m) of a 
  right whale by vessel, aircraft, or any other means;

  (2) Fail to undertake required right whale avoidance measures specified 
  under paragraph (b) of this section.

  (b) Right Whale Avoidance Measures.  Except as provided under paragraph (c) of
  this section, the following avoidance measures must be taken if within 500
  yards (460m) of a right whale:

  (1) If underway, a vessel must steer a course away from the right whale, 
  and immediately leave the area at a slow safe speed;

  (2) An aircraft must take a course away from the right whale, and 
  immediately leave the area at a constant air speed.

  (c) Exceptions. The following exceptions apply to this section, but any person
  who claims the applicability of an exception has the burden of proving that
  the exception is applicable:

  (1) Paragraph (a) and (b) of this section do not apply if a right whale
  approach is authorized by NMFS through a permit issued under subpart C
  (Endangered Fish or Wildlife Permits) of this part or through a similar
  authorization.

  (2) Paragraph (a) and (b) of this section do not apply where compliance would
  create an imminent and serious threat to a person, vessel, or aircraft

  (3) Paragraph (a) and (b) of this section do not apply when approaching to
  investigate a right whale entanglement or injury, or to assist in the
  disentanglement or rescue of a right whale.

  (4) Paragraphs (a) and (b) of this section do not apply to an aircraft unless
  the aircraft is conducting whale watch activities or is being operated for
  that purpose.

  (5) Paragraph (b) of this section does not apply to the extent that a vessel
  is restricted in her ability to maneuver, and because of the restriction,
  cannot comply with paragraph (b) of this section.

  II.  Requirements on operation around any large whale or sea turtle for
  purposes of ocean disposal at the Massachusetts Bay Disposal Site:

  (a) Operational restrictions.

  (1) Disposal operators must not approach within 500 yards (460m) of any large
  whale or 100 yards of any sea turtle with a vessel;

  (2) Disposal operators must follow the avoidance measures described below:

  (b) Avoidance Measures.  Except as provided under paragraph (c) of this 
  section, the following avoidance measure must be taken if within 500 yards

                             SECTION 01130 Page 12
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT      

     (460m) of any large whale or 100 yards of any sea turtle:
     
     (1)  If underway, a vessel must steer a course away from the whale or sea
     turtle, and immediately leave the area at a slow safe speed;

     (c)  Exceptions. The following exceptions apply to this section, but any
     person who claims the applicability of an exception has the burden of
     proving that the exception is applicable:

     (1)  These requirements do no apply where compliance would create an
     imminent and serious threat to a person or vessel.

     (2)  These requirements do not apply when approaching to investigate a
     right whale entanglement or injury, or to assist in the disentanglement or
     rescue of a right whale, provided that permission is received from NMFS or
     a NMFS designee prior to the approach.

     (3)  Paragraph (b) of this section does not apply to the extent that a
     vessel is restricted in her ability to maneuver (as defined in 72 COLREGS
     33 CFR), and because of the restriction, cannot comply with paragraph (b)
     of this section.

     III. REQUIREMENTS FOR RELEASE OF DREDGED MATERIAL AT THE MASSACHUSETTS BAY 
     DISPOSAL SITE:

     If threatened or endangered species of any kind (including whales and sea
     turtles) are sighted within 500 yards from the disposal point, operators
     must wait for the animals to leave the area or must use an alternative
     disposal point specified by the Corps of Engineers (NAE) within the
     boundary of the designated disposal site. If threatened or endangered
     species of any kind are sighted between 500 and 1500 yards from the
     disposal point, the observer shall note animals behavior, relative
     position, and direction and speed of movement to determine if release of
     dredged material is likely to harass or endanger the animals. For example,
     whale actively feeding at or near the disposal point are more likely than
     resting whales to interact with released sediments. If the observer judges
     that disposal is likely to harass or endanger the animals, the observer
     shall inform the vessel caption. Disposal shall be delayed until the
     animals change their behavior or move away such that the observer judges
     that no danger to the animals will result from disposal. In the event that
     behavior and direction of movement is unpredictable, operators should use
     the alternative approved disposal point. In the presence of right whales,
     the most protective operational measure is advised.

     IV. OTHER RESPONSIBILITIES OF VESSEL OPERATOR/ONBOARD OBSERVER (AS
     APPROPRIATE):

     (a) The observer is responsible for contacting NMFS early warning network
     for the most recent information on whale movements and locations prior to
     departure for the disposal site to check for the presence of whales.

     (b)  The observer shall report all whale sightings, noting location, to the
     early warning network at the end of the day. The point of contact is Pat
     Gerrior, NMFS-Woods Hole, (508) 495-2264. The World Wide Web site is
     http://whale.wheelock.edu/whalenet-stuff/rw_intro.html.

                             SECTION 01130 Page 13
<PAGE>
 
                      AMENDED WATER QUALITY CERTIFICATION

              BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

     PROJECT DESCRIPTION
               Federal Channels                          page  2
                    Existing conditions                  page  4
                    Sediment quality                     page  4
               In-channel disposal                       page  5
               Army Base Berths                          page  8
               Conley Terminal Berths                    page 10
               Distrigas Berth                           page 12
               Medford Street Terminal                   page 14
               Moran Terminal                            page 16
               Mystic Terminal Pier 1                    page 18
               Mystic Terminal Piers 2, 49, and 50       page 20
               North Jetty Terminal                      page 22
               Prolerized of New England Berth           page 24

          TECHNICAL ADVISORY COMMITTEE                   page 26
          List of Commenters                             page 26

          CONDITIONS
               A.   General                              page 28
               B.   Regarding Disposal into Cells        page 33
               C.   Cap Placement and Integrity          page 34
               D.   Recolonization of Cap                page 37
               E.   Water Column Monitoring: Disposal    page 38
               F.   Water Column Monitoring: Dredging    page 42
               G.   Water Column Monitoring: Baseline    page 42
               H.   Protection of Fisheries              page 43
               I.   Alternative Technology               page 43

Berth locations
     Mystic River: Distrigas, Medford St. Terminal, Moran Terminal, Prolerized
     Chelsea River: (none)
     Inner Confluence: Mystic Terminal Pier 1, 2, 49, 50
     Reserved Channel: Army Base, Conley Terminal
     Main Ship Channel: North Jetty Terminal

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                           SECTION TABLE OF CONTENTS

                       DIVISION 01 - GENERAL REQUIREMENTS

                                 SECTION 01135

                     WATER QUALITY MONITORING AND CONTROL

PART 1    GENERAL

   1.1    SUBMITTALS 
   1.2    RELATED WORK SPECIFIED ELSEWHERE
   1.3    GENERAL
   1.4    COORDINATION MEETING
   1.5    DIVISION OF RESPONSIBILITIES
     1.5.1   Monitoring Data
     1.5.2   Contract Administration Actions
   1.6    ADMINISTRATIVE REPORTING REQUIREMENTS
     1.6.1   Recommendations for Changes
     1.6.2   Monitoring Data and Reports (36 Hour)
     1.6.3   Monitoring Report for Each Monitoring Event
     1.6.4   Summary Tables
     1.6.5   Summary Report
   1.7    LABORATORY CERTIFICATION
     1.7.1   Laboratory Chemical Analyses
     1.7.2   Laboratory Biological Tests
     1.7.3   Laboratory Detection Limits
   1.8    CONTINGENCY PLAN

PART 2    PRODUCTS (NOT USED)

PART 3    EXECUTION

   3.1    DREDGING REQUIREMENTS
     3.1.1   Environmental Clamshell Bucket
     3.1.2   Environmental Bucket Control
     3.1.3   Debris Management Plan
       3.1.3.1   Release of Oily Material
       3.1.3.2   Discharge of Sediment
       3.1.3.3   Communication During Discharge
     3.1.4   Equivalent Alternative Dredging Technology
   3.2    WATER COLUMN MONITORING - BASELINE
   3.3    WATER COLUMN MONITORING - DREDGING OF DISPOSAL CELLS
   3.4    WATER COLUMN MONITORING - DISPOSAL OPERATIONS
     3.4.1   Plume Location Equipment
     3.4.2   Special Monitoring for Mystic River Federal Channel
       3.4.2.1   Construction Events and Frequency of Sampling
       3.4.2.2   Depth of Sample
       3.4.2.3   Location of Plume Samples
       3.4.2.4   Location of Reference Samples
       3.4.2.5   Time of Sampling:
       3.4.2.6   Reporting 36 Hour Data
       3.4.2.7   Plume Cross Sectional Figure
       3.4.2.8   Dissolved Oxygen Measurements
     3.4.3   Special Monitoring for the Chelsea River Federal Channel
     3.4.4   Monitoring for TSS and Turbidity
     3.4.5   Monitoring of Material from Berths
       3.4.5.1   Bioassays of Material from Mystic River and Berths
       3.4.5.2   Bioassays Protocols  
     3.4.6   Bioaccumulation of Metals
     3.4.7   Plan Views of the Post-Disposal Plume
   3.5    EXCEEDENCES OF WATER QUALITY CRITERIA
     3.5.1   Acute and Chronic Water Quality in the Mixing Zone

                    SECTION TABLE OF CONTENTS 01135 PAGE 1
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

     3.5.2     Exceedences of Water Quality Standards Attributable to Project
               Activities

     3.5.3     Repeat Samples
 
     3.5.4     Implementation of Contingency Plan - Acute Water Quality Criteria
 
     3.5.5     Implementation of Contingency Plan - Chronic Water Quality 
               Criteria

     3.5.6     Exceedance of Total Suspended Solids (TSS) Criteria

     --   End of Section Table of Contents   --


                    SECTION TABLE OF CONTENTS 01135 PAGE 2
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


                                 SECTION 01135

                     WATER QUALITY MONITORING AND CONTROL

PART 1  GENERAL

1.1    SUBMITTALS

   Government approval is required for submittals with a "GA" designation; 
   submittals having an "FIO" designation are for information only. The 
   following shall be submitted in accordance with Section 01300 SUBMITTAL
   PROCEDURES:

       SD-01 Data

   Water Quality Monitoring Requirements Plan; GA, E reviewer.

   The details of water quality monitoring requirements under this section and
   a description of how this monitoring will be accomplished shall be submitted
   to the Contracting Officer for approval. The submittal shall include a sample
   collection plan, a field positioning plan, a lab analysis plan, sample 
   transportation and turn around times, a listing of monitoring personal and 
   their qualifications, chain of custody requirements, and sample data summary
   sheets.

       SD-08 Statements

   Laboratory Certification; GA, E reviewer.

   Submit statements that the laboratory contracted for the chemical analyses
   specified in this section is certified by the Massachusetts Department of
   Environmental Protection for wastewater analysis of the metals of concern 
   and PCBs. Alternative documentation of proficiency may be submitted for
   approval.

       SD-09 Reports

   Monitoring Data and Reports; GA, E reviewer.

   Monitoring data and reports shall be submitted to the Contracting Officer and
   others as specified.

       SD-01 Data

   Contingency Plan; FIO, C reviewer.

   The Contractor shall submit a contingency plan as specified in this section
   and required by the Water Quality Certificate attached at the end of Section
   01130 ENVIRONMENTAL PROTECTION. The Plan shall address mitigation measures to
   be taken if acute water quality criteria are exceeded.

   Environmental Bucket Performance Data; GA, E reviewer.

   Submit demonstrated capability of the environmental bucket to meet the 
   specified suspended solids and turbidity performance standards.

1.2    RELATED WORK SPECIFIED ELSEWHERE

   a.  Additional requirements relative to water quality monitoring and testing
   including submittal of a Debris Management Plan, Bathymetry Surveys, and Cap
   Thickness and Coverage Determination are specified in Section 02482 DREDGING.

                             SECTION 01135  Page 1
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

     b.   Additional requirements relative to water quality monitoring and 
     testing including protection of finfish and marine mammals are specified in
     Section 02491 UNDERWATER DRILLING AND BLASTING.

1.3       GENERAL

     Water Quality Certification and other permit requirements for this contract
     have been extracted from the Certification and other permits and are 
     specified in this and other sections of these specifications. The Water
     Quality Certification (WQC) issued by the Massachusetts Department of 
     Environmental Protection, U.S. Army Corps of Engineers, and various "Order
     of Conditions" issued by the Boston, Everett, Revere, and Chelsea
     Conservation Commissions have been obtained and are attached at the end of 
     Section 01130 ENVIRONMENTAL PROTECTION for information purposes only. The 
     referenced documents shall not be relied on for contract requirements. In
     the event a discrepancy is discovered between the reference documents and
     these specifications or the contract drawings, the Contractor shall notify
     the Contracting Officer for clarification. The Contracting Officer will 
     rely on permit requirements and the Orders of Conditions to resolve 
     perceived conflicts.

1.4       COORDINATION MEETING

     The Contractor shall meet with representatives of the Commonwealth of 
     Massachusetts Department of Environmental Protection and other regulatory
     agencies, prior to undertaking field work, to review the conditions of the
     Water Quality Certification, which are specified in these specifications.
     At a minimum, attendees will include the Corps of Engineer's project
     manager and Contracting Officer, the Massport project manager, the 
     construction contractor's project manager, the Independent Observer, the 
     monitoring project manager, and all other Contractor staff who will hold a
     supervisory position in the field. The purpose of this meeting is to 
     provide the opportunity for regulatory and project staff responsible for
     the project to clarify project requirements relative to Water Quality
     Certification conditions.

1.5       DIVISION OF RESPONSIBILITIES

1.5.1   Monitoring Data

     The Contractor shall be responsible for all monitoring data and reports
     which include physical, chemical, and biological tests during dredging and
     disposal operations, as specified in this section. Items of work required
     by the Water Quality Certificate and not specified in this or other 
     sections of these specifications will be performed by others.

1.5.2   Contract Administration Actions

     Except as otherwise specified in this section, the Government will be 
     responsible for contract administration actions relative to water quality
     monitoring. The Government will direct the implementing mitigation
     measures found in the contingency plan if acute water quality criteria are
     exceeded. The contingency plan is a submittal requirement of this section.

1.6       ADMINISTRATIVE REPORTING REQUIREMENTS

1.6.1   Recommendations for Changes

     The Contractor may initiate recommendations for changes to the Water 
     Quality Certification (WQC) or other permit requirements specified in this
     and other sections of these specifications. Such recommendations shall be 
     submitted in writing to the contracting Officer, who will coordinate the
     request. Massport and the Corps will coordinate the change request with the
     Massachusetts Department of Environmental Protection (DEP) and other
     agencies as appropriate.

                             SECTION 01135 Page 2


<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

1.6.2     Monitoring Data and Reports (36 Hour)

     The Contractor shall forward all 36 hour monitoring data and reports
     referenced in this section, via fax and in electronic form, to Deborah
     Hadden, Massachusetts Port Authority, Logan Office Center, One Harborside
     Drive, Suite 200 South Boston, MA 02128, Voice: (617) 946-4426, FAX: (617)
     946-4422, E:Mail: [email protected] and Catherine Demos, US Army Corps 
     of Engineers, New England District 696 Virginia Road, Concord, 
     Massachusetts 01742-2751, Voice: (781) 647-8231, FAX: (781) 647-8560,
     E:Mail: [email protected], as well as those listed below:.

       a.   All 36 hour monitoring data and reports shall be forwarded to the 
       Department of Envrionmental Protection; attention Judith Perry and Steven
       Lipman, 1 Winter Street, Boston, MA 02108; to Deerin Babb-Brott, CZM, 100
       Cambridge St., Boston, 02202; and to the Independent Observer, Steve
       Wolf, ENSR, 36 Nagog Park, Acton, MA 01720. Samples shall be taken to an
       analytical laboratory at the end of each sampling day. Data required
       within 36 hours of receipt of the samples by the analytical laboratory
       shall be FAXed to the same individuals at DEP at 617-292-5696; CZM at 
       617-727-2754; and at ENSR at 508-635-9180; or made available
       electronically.

       b.   The 36 hour monitoring data shall be made available to DEP, CZM, and
       to other members of the project's Technical Advisory Committee in 
       electronic form (disk or e-mail) or through World Wide Web access and
       updated on a weekly basis.

1.6.3     Monitoring Report for Each Monitoring Event

     Within 7 business days of each monitoring event a monitoring report shall
     be transmitted to Deborah Hadden, Massachusetts Port Authority, Logan
     Office Center, One Harborside Drive, Suite 200 South Boston, MA 02128,
     Voice: (617) 946-4426, FAX: (617) 946-4422, E:Mail: 
     [email protected]; and Catherine Demos, US Army Corps of Engineers, New
     England District 696 Virginia Road, Concord, Massachusetts 01742-2751,
     Voice:  (978) 318-8231, FAX: (978) 318-8560, E-Mail:
     [email protected]. The report and comments made by the
     Contracting Officer will be returned to the Contractor with 2 business
     days. The Contractor shall resolve all comments made by the Contracting
     Officer and deliver the final report back to Deborah Hadden and Catherine
     Demos, and to the Massachusetts Department of Environmental Protection and
     CZM and ENSR addresses noted above within 1 business day. The report shall
     include: date; time and tide; time of sample collection; time that disposal
     occurred; sample locations shown on a plan of reasonable scale; depth of
     sample; laboratory report of analytical results for contaminants including
     appropriate QA/QC test results for blanks; duplicates; spikes; and matrix
     spikes. The source of the barge-load of sediment shall also be acknowledged
     in the monitoring report for all disposal events.

1.6.4     Summary Tables

     Summary tables of all data for each monitoring event shall be provided with
     each monitoring report. The tables shall be designed to allow easy 
     comparison of:

       a.   All parameters measured at a given site and at a given time together
       with the appropriate reference site values, and

       b.   Individual parameters at a given site over all time for the event
       together with reference site values.

1.6.5     Summary Report

     A summary report shall be prepared at the completion of all work and

                             SECTION 01135 Page 3
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  submitted to the Contracting Officer within 30 days of the capping of the
  final cell. The report shall present, in concise form, the operational methods
  for dredging and disposal, and project impacts as determined by monitoring
  data. The origin of the last barge load of sediment placed in each cell shall
  be documented and provided to the Contracting Officer with the final project
  report.

1.7   LABORATORY CERTIFICATION      

1.7.1   Laboratory Chemical Analyses

  The laboratory to perform the chemical analyses specified in this section
  shall be certified by the Massachusetts Department of Environmental Protection
  for wastewater analysis of the metals of concern and PCBs. Alternative
  documentation of proficiency may be submitted to the Contracting Officer for
  approval.

1.7.2  Laboratory Biological Tests

  The laboratory to perform the biological tests (bioassays) specified in this
  Section shall adhere to approved EPA test protocols in all respects, including
  demonstration of species sensitivity to reference toxicants, and attainment of
  required endpoints for control bioassays. Failure to adhere to approved EPA
  test protocols as determined by the Massachusetts Department of Environmental
  Protection, in consultation with EPA, shall invalidate the test and a repeat
  test(s) shall be run.

1.7.3  Laboratory Detection Limits

  The laboratory detection limits for the analyses specified in this section
  shall be sufficiently low to provide reliable data at the following chronic
  water quality criteria for dissolved metals, total recoverable mercury and PCB
  aroclors (ug/1) (from the Massachusetts Surface Water Quality Standards):
  arsenic 36, cadmium 9.2, chromium (VI) 50, copper 2.4, lead 8.1, nickel 8.2,
  zinc 81, total recoverable mercury .025, PCB aroclors .030. It shall be the
  responsibility of the Contractor to ensure that the contract laboratory
  provides evidence/data indicating that the laboratory can provide clean
  sampling and handling techniques, that the analytical methods used (for
  example, EPA 1600 series) shall include a preconcentration step using gold
  amalgamation for mercury or equivalent and a chelate (APDC-DDDC)
  preconcentration step or equivalent for other metals, as well as that contract
  personnel obtain sufficient sample in order to achieve good data at the
  necessary low detection limits to meet these requirements.

1.8  CONTINGENCY PLAN

  The Contractor shall prepare and submit to the Contracting Officer a
  contingency plan which outlines measures to be taken if water quality criteria
  for the parameter(s) of concern and the TSS are exceeded. This contingency
  plan must be approved by the Corps of Engineers in coordination with Massport,
  and the Massachusetts Department of Environmental Protection (MADEP) prior to
  the start of construction. The plan shall include materials and equipment that
  will be available to the Contractor during the duration of this contract, such
  as sorbet booms, silt curtains, flocculating agents, or other equipment. This
  plan may also include other techniques such as slowing the rate of disposal or
  disposal techniques such as direct placement via clamshell bucket or tremie
  tube. The Contractor may suggest to the Contracting Officer other contingency
  measures that will be acceptable to the Corps of Engineers. Include also
  contingency measures to be activated in the event of a significant fish kill
  attributed to the project.

PART 2 PRODUCTS (NOT USED)


                             SECTION 01135 Page 4

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

PART 3    EXECUTION

3.1  DREDGING REQUIREMENTS

3.1.1     Environmental Clamshell Bucket

  Dredging of all soft surface sediments in the Mystic and Chelsea Rivers, the
  Inner Confluence and the Reserved Channel Federal channels and in the
  associated non-federal project berth areas shall be done using a closed
  environmental clamshell bucket, such as the CableArm bucket, or approved
  equal. The dredge bucket shall be designed to completely enclose the dredged
  sediment and water captured. The bucket shall not have teeth. (This is to
  prevent the bucket from digging into the hard parent material.) The bucket
  shall be equipped with escape valves which shut when the bucket is withdrawn
  from the water column. The environmental dredge bucket shall have demonstrated
  the capability of meeting the following water quality performance standards;

     a. Suspended solids shall not exceed 25 mg/1 over background at 25 m (75
     ft) from operation when ambient levels are lower than 100 mg/1.

     b.   Turbidity shall not exceed ambient levels by more than 30% at 25 m (75
     ft) from operation.

3.1.2     Environmental Bucket Control

  The Contractor shall demonstrate that for Maintenance dredging the dredge
  operator has sufficient control over bucket depth in the water and bucket
  closure so that sediment re-suspension from bucket contact with the bottom and
  due to bucket over-filling can be minimized.

3.1.3     Debris Management Plan

  The Contractor shall follow an approved Debris Management Plan. See SECTION
  01130 ENVIRONMENTAL PROTECTION for plan submittal requirements. Where pilings
  or other debris is found to interfere with environmental bucket closure or
  equipment operation, a conventional clamshell bucket may be used to extract
  the pilings/debris. Abandoned piles shall be cut or broken off rather than
  extracted. Sediment removal during such activity shall be minimized to the
  greatest extent practicable. Berths adjacent to pile structures include but
  are not limited to Conley berths 11-17, Moran Terminal, Mystic Pier 1 and
  Berths 49 and 50, and North Jetty. Historic pilings or debris may exist at
  other project sites.

3.1.3.1   Release of Oily Material

  All oily material released during dredging or other project activity shall be 
  promptly collected and disposed at a licensed facility.

3.1.3.2   Discharge of Sediment
  
  All barges used shall be in good operating condition and shall contain the
  sediment and water placed in it so that minimal discharge of sediment or water
  occurs until the barge has been transported to the authorized disposal
  location(s). Deck barges shall not be used to contain channel or berth dredged
  sediments unless the barge has been modified to provide for complete
  containment of the sediments.

3.1.3.3   Communication During Discharge

  The Contractor shall provide the sampling and monitoring crew with a signal
  acceptable to both parties indicating when the dumping of sediment from the
  barge begins. This is essential since monitoring events are timed relative to
  the dumping event.

                                    Page 5
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

3.1.4   Equivalent Alternative Dredging Technology

  Alternatives to the Environmental Clamshell Bucket technology for the removal
  of soft material will not be considered under this contract. However, the
  Contractor may submit a "Value Engineering Change Proposal" under the terms
  and conditions of contract clause "VALUE ENGINEERING -- CONSTRUCTION (MAR
  1998)--ALTERNATE I (APR 1984), following contract award, See Section 00700,
  Contract Clauses.

3.2  WATER COLUMN MONITORING - BASELINE

  Baseline water column data was collected under a previous contract. Data
  collected was for the recommended analyses including: dissolved metals
  (arsenic, cadmium, copper, chromium, lead, mercury, nickel, zinc,) and PCBs,
  as well as TSS and dissolved oxygen (D.0). The data was collected from a plume
  generated by a ship in the Inner Confluence. Relevant results were included in
  a written report for "Sample Event #3" prepared by the U.S. Army Corps of
  Engineers Environmental Laboratory, Hubbardston, MA. The report is available
  for review as specified in paragraph "Existing Reports and Historical Data" of
  Section 02482 DREDGING.

3.3  WATER COLUMN MONITORING - DREDGING OF DISPOSAL CELLS

  Spatial and temporal distribution of the sediment plume shall be documented
  (See paragraph WATER COLUMN MONITORING - DISPOSAL OPERATIONS below) under
  conditions of slack tide and maximum tidal current within the first month of
  dredging surface maintenance material from the cell(s). Dredging shall have
  been on-going for at least two hours and dredge cycle time shall be recorded
  and reported for this period. Documentation for each tidal condition shall
  include:

     a.   A plan view figure (similar to Figure 3.5, Appendix F, FEIR/S attached
     at the end of this section) depicting contours of turbidity or light
     transmittance values over an area encompassing the dredging activity and
     extending a minimum of 300 feet upcurrent and 1000 feet downcurrent and 200
     feet laterally from the dredging activity; depths depicted shall be mid
     water column and within three feet of the bottom;

     b.   A figure in cross section depicting contours of turbidity or light 
     transmittance along a line 300 feet downcurrent of the dredging activity
     and perpendicular to the general current direction extending 200 feet
     laterally from the dredging activity; full depth of the water column shall
     be represented.

     c.   The documentation shall be reported as specified above in paragraph 
     "Monitoring Report for Each Monitoring Event."

3.4  WATER COLUMN MONITORING - DISPOSAL OPERATIONS

3.4.1   Plume Location Equipment

  Plume location equipment, for example a transmissometer, shall be used to
  ensure that all downcurrent samples are located within the maximum density
  (lateral dimension only) of a sediment plume. The instrumentation used to
  locate the plume shall be capable of providing real-time display and data
  capture of light transmittance or turbidity as a depth profile. Measurements
  shall be of sufficient spatial and temporal coverage such that the following
  requirements can be met:

     a.   A plan view figure (similar to figure 3.5, Appendix F, FEIR/S)attached
     at the end of this section) can be generated depicting contours of
     turbidity or light transmittance values over an area extending a minimum of
     300 feet upcurrent and 1000 feet downcurrent and 200 feet laterally from
     the project activity at a specified depth;

                                    Page 6
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

          b.   A figure in cross-section can be generated depicting contours of
          turbidity or light transmittance along a line 300 feet downcurrent of
          the project activity and perpendicular to the general current
          direction extending 200 feet laterally from the project activity. The
          full depth of the water column shall be represented.

3.4.2     Special Monitoring for Mystic River Federal Channel

     Water column sampling and analysis for total PCBs, dissolved copper,
     cadmium, lead, total mercury and TSS (total suspended solids) shall be
     conducted when soft surface sediments from Mystic River Federal channel are
     disposed in-channel disposal cells, as follows:

3.4.2.1   Construction Events and Frequency of Sampling

     This requirement shall apply to disposal activity at the first cell(s) 
     filled with Mystic River soft surface sediments, and to the first three
     disposal events in each tributary in which more than 3000 cy of Mystic
     River sediments are disposed per tidal cycle.

          a. Monitoring at the first cell shall occur during two days in the
          first week that disposal occurs in the cell. Monitoring shall also
          occur during three days that disposal occurs once the cell is at least
          50 percent filled to its design capacity. A record of the number of
          scow loads and the volume of each shall be included with the
          monitoring reports required by this section.

          b. In order to allow the Contractor to safely monitor disposal events,
          this requirement shall apply to one disposal event (or series of
          events if more than one disposal event occurs in a given tidal cycle)
          per day. When disposal events occur during both high tide periods in a
          day, the Contractor shall monitor the event associated with the most
          favorable weather and light conditions.

3.4.2.2   Depth of Sample

     All samples (including reference samples) shall be obtained from within 3
     feet of the harbor bottom outside the cell and from the mid-water column.
     These samples shall be combined. Alternatively, a depth integrated
     composite sample may be obtained from the same depths.

3.4.2.3   Location of Plume Samples

     Plume samples shall be obtained 300 feet downcurrent from the cell.
     Distances shall be measured from the closest boundary of the cell.

          NOTE: For all water column samples required by this specification, 
          ----
          downcurrent and upcurrent shall be determined relative to the bottom
          current direction, as indicated for the specific tide time on NOAA
          Tidal Charts for Boston Harbor.
        
3.4.2.4   Location of Reference Samples

     Reference samples shall be obtained to represent local background water
     conditions outside the affect of sediment disposal events. Acceptable
     locations for reference samples include:

          a.   A point 1000 feet upcurrent (with respect to bottom current
          direction) of an active disposal cell, and

          b.   A point 300 ft downcurrent from the disposal cell prior to
          disposal, provided there has been no dredging at the cell for 12 hours
          and that no disposal into the cell (or into an upcurrent adjacent
          cell) occurred on the same tidal cycle. Other locations may be
          approved by the Contracting Officer in coordination with the
          Massachusetts

                             SECTION 01135 Page 7

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

     Department of Environmental Protection upon request.

3.4.2.5   Time of Sampling:

     a.   At 0.5 and 1.0 Hours Post Disposal:

  Plume samples shall be obtained 0.5 hours and 1.0 hours after the disposal
  event. Location of samples must be 300 feet downcurrent as specified; however,
  time maybe modified slightly in order to meet the requirement to obtain the
  sample from the plume. If multiple dumps will occur on any one tidal cycle,
  timing for the plume sample shall be measured from the last dump. These
  samples shall be analyzed separately and will be used for determining whether
  acute criteria are met. One reference sample shall be obtained prior to
  disposal and analyzed for comparison to the 0.5 and 1.0 hour plume samples.

     b.   At 4 to 6 Hours Post Disposal:

  Two or more additional plume samples shall be collected one hour apart during
  the period four to six hours after disposal, and a single composite sample
  prepared for analysis. This sample represents the average disposal plume for
  the period up to twelve hours after disposal. Tidal conditions are expected to
  be approximately slack low. Two upcurrent reference samples shall be obtained
  during the 4 to 6 hour post-disposal period and combined for one analysis.
  These samples will be used to determine whether chronic criteria are met.

3.4.2.6   Reporting 36 Hour Data

  The resulting monitoring data shall be reported as specified above in
  paragraph "ADMINISTRATIVE REPORTING REQUIREMENTS" within 36 hours from the
  time the analytical laboratory receives the samples. If the 36 hour deadline
  occurs after 5 pm or during the weekend, the data may be reported by 9 AM the
  following business day. Failure to meet this requirement may result in a Stop
  Work Order from the Contracting Officer. The Contractor shall report the data
  on a form similar in detail to that attached at the end of this section.

3.4.2.7   Plume Cross Sectional Figure

  A cross sectional figure of the plume at 300 ft down current from the cell
  shall be generated with the plume location equipment as specified in paragraph
  "Plume Location Equipment", above, immediately following the collection of the
  1.0 hour plume sample for each monitoring event.

3.4.2.8   Dissolved Oxygen Measurements

  A series of at least three dissolved oxygen measurements shall be made with 
  real time instrumentation at all locations, depts and times specified above.

3.4.3     Special Monitoring for the Chelsea River Federal Channel

  Water column sampling and analysis as described above shall also be conducted
  during five (5) days of disposal occurring in cell(s) in the Chelsea River.

3.4.4     Monitoring for TSS and Turbidity

  Monitoring for TSS and turbidity is required during the first week of in-
  channel disposal into a cell. Sampling shall occur during three days.
  Requirements for sample locations, timing, depth, reporting and cross-section
  figure are as described above in paragraph "Special Monitoring for Mystic
  River Federal Channel."

                             SECTION 01135  Page 8

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

3.4.5  Monitoring of Material from Berths

     Monitoring as specified above shall also be conducted when sediment from
     Prolerized, Distrigas, and Mystic Terminal Berths 2, 49 and 50 comprises
     more than 50% of the materials in a large load disposed in harbor bottom
     cells. Samples shall be analyzed for dissolved chromium, arsenic, nickel,
     zinc, and total mercury as well as dissolved copper, cadmium, lead, total
     PCBs, TSS and D.O.

3.4.5.1   Bioassays of Material from Mystic River and Berths

     Bioassays shall be conducted to monitor (1) disposal of Mystic River
     sediments, and (2) disposal of sediment from Prolerized, Distrigas, and
     Mystic Terminal Berths 2, 49 and 50. Water Samples shall be obtained on one
     day during the first two days of Monitoring for normal disposal operations
     as required in paragraph "Special Monitoring for Mystic River Federal
     Channel" and "Monitoring of Material from Berths" above. The tests shall be
     run using a composite of two (or more) water samples collected one hour
     apart at a location 300 ft downcurrent from the cell during the period four
     to six hours following disposal. Water samples from the appropriate
     reference sites shall be tested likewise.

3.4.5.2   Bioassay Protocols

     Two bioassays shall be conducted on each required sample as follows. The
     sea urchin fertilization test shall be conducted according to EPA protocols
     for chronic end point(s). Likewise the seven-day (Mysidopsis bahia) 
                                                       ----------------
     (shimp) test shall be conducted according to EPA protocols for chronic end
     points. The purpose of this requirement is to assess the biological effects
     of a combination of pollutants which may be present; water quality criteria
     alone do not address this factor. In addition, where chemical criteria are
     exceeded and biological tests indicate no adverse effect, the Massachusetts
     Department of Environmental Protection will consider the biological test
     results as more significant in determining whether any operational
     mitigation measures are to be required.

3.4.6     Bioaccumulation of Metals

     Bioaccumulation of metals arsenic, cadmium, lead, and mercury (As, Cd, Pb,
     Hg,) and organics (PCBs, PAHs,) shall be assessed in blue mussels (Mytilus
                                                                        -------
     edulis) in Boston Harbor using MWRA protocols for deployment and analysis
     ------
     of contaminants (as approved by EPA). The MWRA's reference station at
     Central Wharf shall be used. (Timing of this test may be coordinated with
     reference site). This test shall be conducted during the first six months
     of the project. At a minimum, caged mussels shall be deployed for at least
     60 days at four sites at mid water column depth approximately 1000 ft from
     the area occupied by all the disposal cells, as follows: two sites beyond
     the most southerly disposal cell in the Inner Confluence and two sites
     upstream of the most upstream cell in the Mystic River. The details of this
     task shall be provided in advance to the Contracting Officer for review and
     approval. The purpose of this requirement is to determine longer term
     impacts to biological resources within a likely zone of impact from the
     project than can be determined with chemical analysis of water samples
     alone.

3.4.7     Plan Views of the Post-Disposal Plume

     During the first month of disposal activity, plan views of the post-
     disposal plume shall be generated using the plume tracking equipment
     described in paragraph, "Plume Location Equipment" above. Such plan views
     shall be provided showing areal extent of the plumes at the water surface,
     at mid-water column and within a foot of the bottom. Date shall be gathered
     between one and two hours following a disposal event on five occasions.
     This documentation shall be provided as specified above in

                             SECTION 01135 Page 9
<PAGE>

BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  paragraph "ADMINISTRATIVE REPORTING REQUIREMENTS."

3.5       EXCEEDENCES OF WATER QUALITY CRITERIA

3.5.1     Acute and Chronic Water Quality in the Mixing Zone

  The mixing zone for dredging and disposal of project sediments shall be 300
  feet downcurrent from the activity. At this point, both acute and chronic
  water quality criteria * shall be met. Acute criteria shall be met within the
  mixing zone at all times. Monitoring for water column contaminants is detailed
  in paragraphs "WATER COLUMN MONITORING - DISPOSAL OPERATIONS" and "WATER
  COLUMN MONITORING - DREDGING OF DISPOSAL CELLS" above and the requirements are
  designed to allow the Massachusetts Department of Environmental Protection to
  determine whether water quality standards and criteria are being met;

     *    Acute criteria are defined as the one hour average concentration which
     should not be exceeded more than once every three years on average; chronic
     criteria are defined as the 4 day average concentration which should not be
     exceeded more than once every three years, except that the PCB chronic
     criterion is a 24 hour limit of exposure.

3.5.2     Exceedences of Water Quality Standards Attributable to Project 
Activities

  Exceedences of contaminant Water Quality Standards shall be attributed to
  project activities when the sample concentration obtained down-current from
  the project activity exceeds the particular standard and the sample
  concentration is at least 30% higher than the appropriate reference sample
  concentration. In the case of dissolved oxygen, real time measurements of D.O.
  shall be used and failure to meet water quality standards shall be deemed
  evident when there is a statistical difference at the 95% confidence interval
  between the down-current sample mean and the appropriate reference sample
  mean.

3.5.3     Repeat Samples

  If water samples collected at the edge of the mixing zone fail to meet water
  quality standards and this effect is attributed to project activities as
  specified above, repeat samples shall be obtained under similar conditions
  within 24 hours after the laboratory obtains the results of the first set of
  samples. The repeat samples shall be analyzed for the parameter(s) of concern
  and for TSS. Verification that the samples were obtained within the sediment
  plume or that there was no plume shall be provided (see paragraph "Need for
  Continued Monitoring" above). The analytical data shall be submitted as
  specified above in paragraph, "Monitoring Data and Reports" within 36 hours
  after the sample is received by the laboratory.

3.5.4     Implementation of Contingency Plan - Acute Water Quality Criteria

  If two consecutive water samples collected in accordance with paragraph,
  "Repeat Samples" above fail to meet acute water quality criteria as specified
  in paragraph, "Exceedences of Water Quality Standards Attributable to Project
  Activities" above, the Contractor shall take the following actions designed to
  limit such exceedences: the mitigation measures included in the contingency
  plan, as pre-approved by the Contracting Officer in coordination with the
  Massachusetts Department of Environmental Protection, shall be immediately
  implemented or all disposal activities shall cease in the affected work area
  until an alternative proposal is provided to and approved, which shall then be
  immediately implemented.

3.5.5     Implementation of Contingency Plan - Chronic Water Quality Criteria

                            SECTION 01135  Page 10
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  If two consecutive water samples collected in accordance with paragraph,
  "Repeat Samples" above fail to meet chronic water quality criteria as
  specified in paragraph, "Exceedences of Water Quality Standards Attributable
  to Project Activities" above, then the following action shall be implemented:
  work may continue provided chronic bioassay tests as specified in paragraph
  "Bioassays of Material from Mystic River and Berths" above are undertaken
  within 48 hours, or the Contracting Officer receives proposed mitigation
  measures within 48 hours and mitigation measures approved by the Contracting
  Officer are implemented within 48 hours of the approval. Such measures may
  include operational controls such as reductions in dredge production rate,
  silt curtain containment of the disposal cell or activity, and/or other
  mitigation measures to be determined by the Contracting Officer in
  consultation with the Massachusetts Department of Environmental Protection.
  The Contracting Officer in coordination with the Massachusetts Department of
  Environmental Protection will require water column testing to establish the
  effectiveness of any operational controls implemented.

3.5.6     Exceedance of Total Suspended Solids (TSS) Criteria

  If TSS exceeds the performance goal of 200 mg/1 at 500 ft downcurrent of the
  disposal cell, the Contracting Officer in coordination with the Massachusetts
  Department of Environmental Protection will evaluate the significance of the
  TSS data and determine the requirements for additional mitigation.

          -- End of Section --

                             SECTION 01135 Page 11


<PAGE>
 
       BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT
                  WATER QUALITY CERTIFICATION TRANSMITTAL NO.

                         DISPOSAL OPERATION MONITORING




Dredged Material Location:                       In-Channel Disposal Location:
- -------------------------                        ----------------------------
Date:                                            Weather:
Time of Disposal Event:                          High Tide/Low Tide:
Other events/comments:


<TABLE> 
<CAPTION> 
- ------------------------------------------------------------------------------------------------------------------------------------
                         Lapsed      Time      Position     Position      Depth of      Tide(ft)     Turbidity      TSS       DO
                          Time                   (X)          (Y)          Sample                      Range       (mg/l)   (mg/l)
                        (hours)                                             (ft)                       (NTU)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                     <C>          <C>       <C>          <C>           <C>           <C>          <C>           <C>      <C> 
Performance goal                                                                                                    200
- ------------------------------------------------------------------------------------------------------------------------------------
Location
- ------------------------------------------------------------------------------------------------------------------------------------
1000* up (reference)
- ------------------------------------------------------------------------------------------------------------------------------------
300* down                0.50
- ------------------------------------------------------------------------------------------------------------------------------------
300* down                1.00
- ------------------------------------------------------------------------------------------------------------------------------------
1000* up (reference)     composite
- ------------------------------------------------------------------------------------------------------------------------------------
300* down                4-6
                         composite
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE> 

<TABLE> 
<CAPTION> 
- ------------------------------------------------------------------------------------------------------------------------------------
                         Lapsed      Total     Mercury      Cadmium       Lead      Copper     Arsenic     Nickel    Zinc   Chromium
                          Time       PCBs      (ug/l)       (ug/l)       (ug/l)     (ug/l)     (ug/l)*     (ug/l)*  (ug/l)* (ug/l)* 
                        (hours)     (ug/l)     
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                     <C>         <C>        <C>          <C>          <C>        <C>        <C>         <C>      <C>     <C>  
Acute Criterion                                 1.8            4.2         210        2.4         69         74       90      1100
- ------------------------------------------------------------------------------------------------------------------------------------
Chronic Citeria                                0.025           9.2         8.1        2.4         36        8.2       81       50
- ------------------------------------------------------------------------------------------------------------------------------------
Location
- ------------------------------------------------------------------------------------------------------------------------------------
1000* up (reference)
- ------------------------------------------------------------------------------------------------------------------------------------
300* down                0.50
- ------------------------------------------------------------------------------------------------------------------------------------
300* down                1.00
- ------------------------------------------------------------------------------------------------------------------------------------
1000* up (reference)     composite
- ------------------------------------------------------------------------------------------------------------------------------------
300* down                4-6
                         composite
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE> 

* For barges containing more than 50% of Prolerized, Distrigas, and/or Mystic 
  Terminal Berths 2, 49, 50 material.
<PAGE>
 
                              [MAP APPEARS HERE]




     Figure 3.5  Maximum mixing zone (greater than 42 mg/L) for TSS based on a
                 typical multiple instantaneous release scenario (DS3000
                 [~6000yd/3/day]) at the Inner Confluence disposal site
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                           SECTION TABLE OF CONTENTS

                      DIVISION 01 - GENERAL REQUIREMENTS

                                 SECTION 01300

                             SUBMITTAL PROCEDURES

PART 1  GENERAL

  1.1  SUBMITTAL IDENTIFICATION  
  1.2  SUBMITTAL CLASSIFICATION 
    1.2.1   Government Approved
    1.2.2   Information Only
  1.3   APPROVED SUBMITTALS
  1.4   DISAPPROVED SUBMITTALS
  1.5   WITHHOLDING OF PAYMENT

PART 2  PRODUCTS (Not Applicable)

PART 3  EXECUTION

  3.1   GENERAL
  3.2   SUBMITTAL REGISTER (ENG FORM 4288)
  3.3   SCHEDULING
  3.4   TRANSMITTAL FORM (ENG FORM 4025)
  3.5   SUBMITTAL PROCEDURE
    3.5.1   Procedures 
      3.5.1.1  Construction/Operations Division ("C" Reviewer)
      3.5.1.2  Engineering/Planning Division ("E" Reviewer)
      3.5.1.3  Safety Office ("S" Reviewer)
      3.5.1.4  Information on Submittal Status 
    3.5.2   Transmittal Procedure (ENG FORM 4025)  
  3.6   DEVIATIONS
    3.6.1   Substitutions
      3.6.1.1  Basis of Contract
      3.6.1.2  Consideration of Substitutions
      3.6.1.3  Representation
      3.6.1.4  Implied Substitutions
      3.6.1.5  Approval 
      3.6.1.6  Notification of Acceptance or Rejection
  3.7   CONTROL OF SUBMITTALS
  3.7   Deviations
  3.8   CONTROL OF SUBMITTALS
  3.9   GOVERNMENT APPROVED SUBMITTALS
  3.10  INFORMATION ONLY SUBMITTALS
  3.11  STAMPS

- -- End of Section Table of Contents --

                    SECTION TABLE OF CONTENTS 01300 PAGE 1

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                                 SECTION 01300

                             SUBMITTAL PROCEDURES

PART 1  GENERAL

1.1  SUBMITTAL IDENTIFICATION

  Submittals required are identified by SD numbers as follows:

     SD-01 Data

     SD-04 Drawings
 
     SD-06 Instructions
    
     SD-07 Schedules

     SD-08 Statements

     SD-09 Reports

     SD-13 Certificates

     SD-14 Samples

     SD-18 Records

     SD-19 Operation and Maintenance Manuals

1.2  SUBMITTAL CLASSIFICATION

  Submittals are identified with submittal description (SD) numbers and are
  classified as follows:

1.2.1   Government Approved

  Governmental approval is required for extensions of design, critical
  materials, deviations, equipment whose compatibility with the entire system
  must be checked, and other items as designated by the Contracting Officer.
  Within the terms of the Contract Clause entitled "Specifications and Drawings
  for Construction," they are considered to be "shop drawings."

1.2.2   Information Only

  All submittals not requiring Government approval will be for information only.
  They are not considered to be "shop drawings" within the terms of the Contract
  Clause referred to above.

1.3     APPROVED SUBMITTALS

  The Contracting Officer's approval of submittals shall not be construed as a
  complete check, but will indicate only that the general method of
  construction, materials, detailing and other information are satisfactory.
  Approval will not relieve the Contractor of the responsibility for any error
  which may exist, as the Contractor under the CQC requirements of this contract
  is responsible for dimensions, the design of adequate connections and details,
  and the satisfactory construction of all work. After submittals have been
  approved by the Contracting Officer, no resubmittal for the purpose of
  substituting materials or equipment will be considered unless accompanied by
  an explanation of why a substitution is necessary.

1.4  DISAPPROVED SUBMITTALS

                             SECTION 01300 Page 1

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

     The Contractor shall make all corrections required by the Contracting
     Officer and promptly furnish a corrected submittal in the form and number
     of copies specified for the initial submittal. If the Contractor considers
     any correction indicated on the submittals to constitute a change to the
     contract, a notice in accordance with the Contract Clause "Changes" shall
     be given promptly to the Contracting Officer.

1.5     WITHHOLDING OF PAYMENT

     Payment for materials incorporated in the work will not be made if required
     approvals have not been obtained.

PART 2  PRODUCTS (Not Applicable)

PART 3  EXECUTION

3.1  GENERAL

     The Contractor shall make submittals as required by the specifications. The
     Contracting Officer may request submittals in addition to those specified
     when deemed necessary to adequately describe the work covered in the
     respective sections. Units of weights and measures used on all submittals
     shall be the same as those used in the contract drawings. Each submittal
     shall be complete and in sufficient detail to allow ready determination of
     compliance with contract requirements. Prior to submittal, all items shall
     be checked and approved by the Contractor's Quality Control (CQC)
     representative and each item shall be stamped, signed, and dated by the CQC
     representative indicating action taken. Proposed deviations from the
     contract requirements shall be clearly identified. Submittals shall include
     items such as: Contractor's, manufacturer's, or fabricator's drawings;
     descriptive literature including (but not limited to) catalog cuts,
     diagrams, operating charts or curves; test reports; test cylinders;
     samples; O&M manuals (including parts list); certifications; warranties;
     and other such required submittals. Submittals requiring Government
     approval shall be scheduled and made prior to the acquisition of the
     material of equipment covered thereby. Samples remaining upon completion of
     the work shall be picked up and disposed of in accordance with
     manufacturer's Material Safety Data Sheets (MSDS) and in compliance with
     existing laws and regulations.

3.2    SUBMITTAL REGISTER (ENG FORM 4288)     

     At the end of this section is one set of ENG Form 4288 listing items of
     equipment and materials for which submittals are required by the
     specifications; this list may not be all inclusive and additional
     submittals may be required. The Contractor will also be given the submittal
     register as a diskette containing the computerized ENG Form 4288 and
     instructions on the use of the diskette. Columns "d" through "q" have been
     completed by the Government; the Contractor shall complete columns "a" and
     "r" through "t" and submit the forms (hard copy plus associated electronic
     file) to the Contracting Officer for approval within 15 calendar days after
     Notice to Proceed. The Contractor shall keep this diskette up-to-date and
     shall submit it to the Government together with the monthly payment
     request. The approved submittal register will become the scheduling
     document and will be used to control submittals throughout the life of the
     contract. The submittal register and the progress schedules shall be
     coordinated.

3.3    SCHEDULING
     
     Submittals covering component items forming a system or items that are
     interrelated shall be scheduled to be coordinated and submitted
     concurrently. Certifications to be submitted with the pertinent drawings
     shall be so scheduled. Adequate time (a minimum of 21 calendar days

                            SECTION 01300  PAGE 2
 
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

  exclusive of mailing time) shall be allowed and shown on the register for
  review and approval. No delay damages or time extensions will be allowed for
  time lost in late submittals.

3.4       TRANSMITTAL FORM (ENG FROM 4025)

  The sample transmittal form (ENG Form 4025) attached to this section shall be
  used for submitting both Government approved and information only submittals
  in accordance with the instructions on the reverse side of the form. These
  forms will be furnished to the Contractor. This form shall be properly
  completed by filling out all the heading blank spaces and identifying each
  item submitted. Special care shall be exercised to ensure proper listing of
  the specification paragraph and/or sheet number of the contract drawings
  pertinent to the data submitted for each item.

3.5       SUBMITTAL PROCEDURE

  Submittals shall be made as follows:

3.5.1     Procedures

  Submit six (6) copies of each submittal item with an attached ENG FORM 
  4025 Transmittal Form.

3.5.1.1   Construction/Operations Division ("C" Reviewer)

  A "C" in column "r" indicates that the submittal review action is by New
  England District (NAE) Construction/Operations Division. Send all such
  submittals to the project Resident or Area Engineer, as applicable.

3.5.1.2   Engineering/Planning Division ("E" Reviewer)

  An "E" on the attached submittal register, column "r" indicates that the
  submittal review action is by the New England District (NAE)
  Engineering/Planning Division. Send all such submittals to the U.S. Army Corps
  of Engineers, New England District 696 Virginia Road, Concord, Massachusetts
  01742-2751.

3.5.1.3   Safety Office ("S" Reviewer)

  An "S" on the attached submittal register, column "r" indicates that the
  submittal review action is by the New England District (NAE) Safety Officer.
  Send all such submittals to the U.S. Army Corps of Engineers, New England
  District 696 Virginia Road, Concord, Massachusetts 01742-2751.

3.5.1.4   Information on Submittal Status

  All Contractor requests for current status of submittal reviews shall be made 
  through the Resident Engineer.

3.5.2     Transmittal Procedure (ENG FORM 4025)

  Each copy of a submittal item shall have an attached transmittal ENG FORM
  4025. In addition to the above, and commensurate with the submittal review
  process, as indicated below, separate information copies of ENG FORM 4025,
  only, (i.e., without enclosures) shall be forwarded by the Contractor directly
  to each of the following, as applicable:

          (a)  Submittals reviewed by Resident Engineer ("C" reviewer): One copy
          each to the Area Engineer, and the Construction/Operations Division,
          NAE.

          (b)  Submittals reviewed by Area Engineer ("C" reviewer): One copy 
          each to the Resident Engineer, and the Construction/Operations
          Division, NAE.


                            SECTION 01300    Page 3
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

     (c)  Submittals reviewed by Engineering/Planning ("E reviewer") Division,
     NAB: One copy each to the Area Engineer, the Resident Engineer, and the 
     Construction/Operations Division, NAE.

     (d)  Submittals reviewed by Safety Office ("S reviewer"), NAE: One copy 
     each to the Area Engineer, the Resident Engineer and the Construction
     Division, NAE.

     (e)  Additional information copies for a submittal may be directed; these
     shall be to addresses indicated in specification section and concurrent 
     with the submittal. Send Resident Engineer one copy of transmittal letters
     to the addressee.

3.6        DEVIATIONS

  For submittals which include proposed deviations requested by the Contractor, 
  the column "variation" of ENG FORM 4025 shall be checked. The Contractor shall
  set forth in writing the reason for any deviations and annotate such
  deviations on the submittals. The Government reserves the right to rescind
  inadvertent approval of submittals containing unnoted deviations.

3.6.1     Substitutions

3.6.1.1   Basis of Contract

  The contract is based on the materials, equipment, and methods described in 
  the contract documents.

3.6.1.2   Consideration of Substitutions

  The Contracting Officer will consider proposals for substitutions of
  materials, equipment, and methods only when such proposals are accompanied by
  full and complete technical data and all other information required by the
  Contracting Officer to evaluate the proposed substitution. Document each
  request with complete data substantiating compliance of proposed substitution
  with contract documents.

3.6.1.3   Representation

  Requests constitute a representation that the Contractor:

     a.   Has investigated proposed product and determined that it meets or
     exceeds, in all respects, specified product.

     b.   Will provide the same warranty for substitution as for specified 
     product.

     c.   Will coordinate installation and make other changes which may be 
     required for work to be completed in all respects.

     d.   Waives claims for additional costs which may subsequently become
     apparent due to substitution.

3.6.1.4   Implied Substitutions

  Substitutions will not be considered when they are indicated or implied on 
  shop drawings or product data submittals without separate written request, or
  when acceptance will require substantial revision of contract documents.

3.6.1.5   Approval

  Do not substitute materials, equipment, or methods unless such substitution
  has been specifically approved in writing for this work by the Contracting
  Officer.

                             SECTION 01300 Page 4
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


3.6.1.6    Notification of Acceptance or Rejection

  The Contracting Officer will determine acceptability of proposed 
  substitutions, and will notify Contractor of acceptance or rejection in 
  writing.

3.7  CONTROL OF SUBMITTALS

  The Contractor shall carefully control his procurement operations to ensure
  that each individual submittal is made on or before the Contractor scheduled
  submittal date shown on the approved "Submittal Register."

3.7  Deviations

  For submittals which include proposed deviations requested by the Contractor,
  the column "variation" of ENG Form 4025 shall be checked. The Contractor shall
  set forth in writing the reason for any deviations and annotate such 
  deviations on the submittal. The Government reserves the right to rescind 
  inadvertent approval of submittals containing unnoted deviations.

3.8  CONTROL OF SUBMITTALS

  The Contractor shall carefully control his procurement operations to ensure
  the each individual submittal is made on or before the Contractor scheduled
  submittal date shown on the "Submittal Register."

3.9  GOVERNMENT APPROVED SUBMITTALS

  Upon completion of review of submittals requiring Government approval, the 
  submittals will be identified as having received approval by being so stamped
  and dated. Four copies of the submittal will be retained by the Contracting
  Officer and two copies of the submittal will be returned to the Contractor.

3.10 INFORMATION ONLY SUBMITTALS

  Normally submittals for information only will not be returned. Approval of the
  Contracting Officer is not required on information only submittals. The 
  Government reserves the right to require the Contractor to resubmit any item 
  found not to comply with the contract. This does not relieve the Contractor
  from the obligation to furnish material conforming to the plans and 
  specifications; will not prevent the Contracting Officer from requiring
  removal and replacement of nonconforming material incorporated in the work; 
  and does not relieve the Contractor of the requirement to furnish samples for
  testing by the Government laboratory or for check testing by the Government in
  those instances where the technical specifications so prescribe.

3.11 STAMPS

  Stamps used by the Contractor on the submittal data to certify that the 
  submittal meets contract requirements shall be similar to the following:

                             SECTION 01300 Page 5
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT





________________________________________________________________________________
                                  CONTRACTOR

                                  (Firm Name)

____ Approved

____ Approved with corrections as noted on submittal data and/or attached sheets
(s).


SIGNATURE:____________________________________________________________

TITLE:________________________________________________________________

DATE:_________________________________________________________________

________________________________________________________________________________

    -- END OF SECTION --

                             SECTION 01300 Page 6
<PAGE>
 
                              SUBMITTAL REGISTER

<TABLE> 
<CAPTION> 
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                                                SUBMITTAL REGISTER                                   
                                                  (ER415 1-10)                                     
- -------------------                -------------------------------------------------------------------------------------------------
TITLE AND LOCATION                                                         CONTRACTOR      
BOSTON HARBOR NAVIGTION IMPROVMENT AND BERTH DREDGING PROJECT                             
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                             TYPE OF SUBMITTAL                       CLASSI-     
                                                                                                                    FICATION     


                                                                       I                   C                                     
   A                                                                   N                   E              O    I                 
   C                                                                   S         S         R              &    N       G         
   T                                                                   T    S    T         T              M    F       O         
   I                                                             D     R    C    A         I                   O       V A     R
   V       TRANS-    I     SPECIFICATION                         R     U    H    T    R    F    S    R    M    R       E P     E
   I       MITTAL    T       PARAGRAPH     DESCRITION OF         A     C    E    E    E    I    A    E    A    M       R P     V
   T         NO.     E         NUMBER      ITEM SUBMITTED        W     T    D    M    P    C    M    C    N    A       N R     I
   Y                 M                                      D    I     I    U    E    O    A    P    O    U    T O     M O     E
                                                            A    N     O    L    N    R    T    L    R    A    I N     E V     W
   N                 N                                      T    G     N    E    T    T    E    E    D    L    O L     N E     E
   O                 O                                      A    S     S    S    S    S    S    S    S    S    N Y     T D     R
   a.        b.      c.          d.               e.        f.   g.    h.   i.   j.   k.   l.   m.   n.   o.    p.     q.       r.
- ----------------------------------------------------------------------------------------------------------------------------------- 
<S>       <C>        <C>   <C>            <C>               <C>  <C>   <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>     <C>      <C> 
                           1.4.2.2        Progress Schedule                  X                                          X        C 
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<CAPTION> 
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                                                                                                                   CONTRACT NO.
                                                                                                                   DACW 33-98-C-00
- ----------------------------------------------------------------------------------------------------------------------------------- 
CONTRACTOR                                                                                                     SPECIFICATION ACTION
                                                                                                                      01010
- ----------------------------------------------------------------------------------------------------------------------------------- 
                 CONTRACTOR                             CONTRACTOR                                GOVERNMENT 
               SCHEDULE DATES                             ACTION                                    ACTION
- ---------------------------------------------------------------------------------------------------------------


                                                                          SUBMIT 
                   APPROVAL         MATERIAL                                TO
                    NEEDED           NEEDED                               GOVERN-
     SUBMIT           BY               BY                 DATE             MENT                     DATE           REMARKS
                                                  C                                         C
                                                  O                                         O
                                                  D                                         D
                                                  E                                         E
       s.             t.               u.         v.        w.              x.              y.       z                aa.
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HG FORM 4288, JUL 98                                   SPECSINTACT                                             PAGE 1 OF 8 PAGES
</TABLE> 
<PAGE>

<TABLE> 
<S>                      <C> 
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                                          (ER415 1-10)                                     
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TITLE AND LOCATION                                                         
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT                                                         CONTRACTOR
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                    TYPE OF SUBMITTAL      CLASSI-     
                                                                                                          FICATION     
                                                                                  -------------------------------------

                                                                                 I           C                                   
     A                                                                           N           E        O   I                      
     C                                                                           S     S     R        &   N     G                
     T                                                                           T  S  T     T        M   F     O                
     I                                                                           R  C  A     I            O     V  A   R 
     V    TRANS-   I   SPECIFICATION                                         D   U  H  T  R  F  S  R  M   R     E  P   E 
     I    MITTAL   T     PARAGRAPH         DESCRIPTION OF                    R   C  E  E  E  I  A  E  A   M     R  P   V 
     T      NO.    E       NUMBER          ITEM SUBMITTED                    A   T  D  M  P  C  M  C  N   A     N  R   I      
     Y             M                                                     D   W   I  U  E  O  A  P  O  U   T O   M  O   E 
                                                                         A   I   O  L  N  R  T  L  R  A   I N   E  V   W 
     N             N                                                     T   N   N  E  T  T  E  E  D  L   O L   N  E   E 
     O             O                                                     A   G   S  S  S  S  S  S  S  S   N Y   T  D   R 
     a.     b.     c.        d.                 e.                       f.  g.  h. i. j. k. l. m. n. o.   p.    q.    r.     
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                       1.1              Weight Certificates              X                                        X    C      
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<CAPTION> 
                                                                                               CONTRACT NO.
                                                                                               DACW33-98-C-00
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CONTRACTOR                                                                                     SPECIFICATION SECTION
                                                                                                       01025
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                         CONTRACTOR                        CONTRACTOR                       GOVERNMENT
                       SCHEDULE DATES                        ACTION                            ACTION
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<S>                    <C>                                 <C>                              <C>  
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                          APPROVAL  MATERIAL                         TO                   
                           NEEDED    NEEDED                        GOVERN-                
     SUBMIT                  BY        BY         C        DATE     MENT           C           DATE            REMARKS
                                                  O                                O      
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NG FORM 4288, JUL 98                                   SPECSINTACT                                           PAGE 2 OF 8 PAGES
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                              SUBMITTAL REGISTER

<TABLE> 
<CAPTION> 
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                                                           (ER 415 1-10)
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TITLE AND LOCATION                                                         
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT                             
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                                                                         TYPE OF SUBMITTAL                        CLASSI-    
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                                                                    ------------------------------------------------------

                                                                         I                   C                                    
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   C                                                                     S         S         R             &    N      G          
   T                                                                     T    S    T         T             M    F      O          
   I                                                                D    R    C    A         I                  O      V A    R   
   V    TRANS-   I   SPECIFICATION                                  R    U    H    T    R    F   S    R    M    R      E P    E   
   I    MITTAL   T     PARAGRAPH    DESCRIPTION OF                  A    C    E    E    E    I   A    E    A    M      R P    V   
   T      NO.    E       NUMBER     ITEM SUBMITTED                  W    T    D    M    P    C   M    C    N    A      N R    I   
   Y             M                                             D    I    I    U    E    O    A   P    O    U    T O    M O    E   
                                                               A    N    O    L    N    R    T   L    R    A    I N    E V    W   
   N             N                                             T    G    N    E    T    T    E   E    D    L    O L    N E    E   
   O             O                                             A    S    S    S    S    S    S   S    S    S    N Y    T D    R   
   a.     b.     c.       d.              e.                   f.   g.   h.   i.   j.   k.   l.  m.   n.   o.    p.     q.    r.  
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<S>     <C>      <C> <C>       <C>                             <C>  <C>  <C>  <C>  <C>  <C>  <C> <C>  <C>  <C>  <C>    <C>    <C> 
                     1.2        Field Data                      X                                                       X      C 
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                     1.2        Survey Data                     X                                                       X      C
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                     1.2        Survey  Personnel                                  X                                    X      C  
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                                                                                     CONTRACT NO.
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CONTRACTOR                                                                           SPECIFICATION SECTION
                                                                                            01050                                   
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              CONTRACTOR                          CONTRACTOR                         GOVERNMENT 
            SCHEDULE DATES                          ACTION                             ACTION    
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                                                            SUBMIT  
              APPROVAL       MATERIAL                         TO       
               NEEDED         NEEDED                        GOVERN- 
SUBMIT          BY              BY               DATE        MENT                 DATE            REMARKS    
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<PAGE>

<TABLE> 
<S>                                   <C> 
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BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT                             
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                                                                                                     FICATION                      
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                                                                                 I           C                                   
     A                                                                           N           E        O   I                      
     C                                                                           S     S     R        &   N     G                
     T                                                                           T  S  T     T        M   F     O                
     I                                                                       D   R  C  A     I            O     V A    R 
     V    TRANS-   I   SPECIFICATION                                         R   U  H  T  R  F  S  R  M   R     E P    E 
     I    MITTAL   T     PARAGRAPH         DESCRIPTION OF                    A   C  E  E  E  I  A  E  A   M     R P    V 
     T      NO.    E       NUMBER          ITEM SUBMITTED                    W   T  D  M  P  C  M  C  N   A     N R    I      
     Y             M                                                     D   I   I  U  E  O  A  P  O  U   T O   M O    E 
                                                                         A   N   O  L  N  R  T  L  R  A   I N   E V    W 
     N             N                                                     T   G   N  E  T  T  E  E  D  L   O L   N E    E 
     O             O                                                     A   S   S  S  S  S  S  S  S  S   N Y   T D    R 
     a.     b.     c.        d.                 e.                       f.  g.  h. i. j. k. l. m. n. o.   p.    q.    r.     
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                       1.3           Fish Startle Equipment and Sonar   X                                         X   E
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                       1.3           Fisheries Observer                                X                          X   E
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                       1.3           Marine Mammal Observer                            X                          X   E
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<CAPTION> 
                                                                                               CONTRACT NO.
                                                                                               DACW33-98-C-00
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CONTRACTOR                                                                                     SPECIFICATION SECTION
                                                                                                       01130
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                         CONTRACTOR                        CONTRACTOR                       GOVERNMENT
                       SCHEDULE DATES                        ACTION                            ACTION
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                                                                   SUBMIT                 
                          APPROVAL  MATERIAL                         TO                   
                           NEEDED    NEEDED                        GOVERN-                
     SUBMIT                  BY        BY         C        DATE     MENT           C           DATE            REMARKS
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ENG FORM 4288, JUL 98                                   SPECSINTACT                                          PAGE 4 OF 8 PAGES
</TABLE> 

<PAGE>

<TABLE> 
<S>                      <C> 
- ------------------------------------------------------------------------------------------------------------------------------------
                                      SUBMITTAL REGISTER                                   
                                          (ER415 1-10)                                     
- -------------------      --------------------------------------------    ------------------
TITLE AND LOCATION                                                         CONTRACTOR      
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT                             
- -------------------------------------------------------------------------------------------
                                       TYPE OF SUBMITTAL      CLASSI-                      
                                                             FICATION                      
                                     -------------------------------------

                                                                                 I           C                                   
     A                                                                           N           E        O   I                      
     C                                                                           S     S     R        &   N     G                
     T                                                                           T  S  T     T        M   F     O                
     I                                                                       D   R  C  A     I            O     V A    R 
     V    TRANS-   I   SPECIFICATION                                         R   U  H  T  R  F  S  R  M   R     E P    E 
     I    MITTAL   T     PARAGRAPH         DESCRIPTION OF                    A   C  E  E  E  I  A  E  A   M     R P    V 
     T      NO.    E       NUMBER          ITEM SUBMITTED                    W   T  D  M  P  C  M  C  N   A     N R    I       
     Y             M                                                     D   I   I  U  E  O  A  P  O  U   T O   M O    E 
                                                                         A   N   O  L  N  R  T  L  R  A   I N   E V    W 
     N             N                                                     T   G   N  E  T  T  E  E  D  L   O L   N E    E 
     O             O                                                     A   S   S  S  S  S  S  S  S  S   N Y   T D    R 
     a.     b.     c.        d.                 e.                       f.  g.  h. i. j. k. l. m. n. o.   p.    q.    r.     
- ------------------------------------------------------------------------------------------------------------------------------
                       1.2              Water Quality Monitoring         X                                        X    E      
- ------------------------------------------------------------------------------------------------------------------------------
                                         Requirements Plan                                                                    
- ------------------------------------------------------------------------------------------------------------------------------
                       1.8              Laboratory Certification                       X                          X    E      
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                       1.7.2            Monitoring Data and Reports                       X                       X    E      
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                       1.9              Contingency Plan                 X                                X            C      
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                       1.2              Environmental Bucket Performance X                                        X    E      
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<CAPTION> 
                                                                                               CONTRACT NO.
                                                                                               DACW33-98-C-00
- ------------------------------------------------------------------------------------------------------------------------------
CONTRACTOR                                                                                     SPECIFICATION SECTION
                                                                                                       01135
- ------------------------------------------------------------------------------------------------------------------------------
                         CONTRACTOR                        CONTRACTOR                       GOVERNMENT
                       SCHEDULE DATES                        ACTION                            ACTION
- -------------------------------------------------------------------------------------------------------
<S>                    <C>                                 <C>                              <C>  
                                                                   SUBMIT                 
                          APPROVAL  MATERIAL                         TO                   
                           NEEDED    NEEDED                        GOVERN-                
     SUBMIT                  BY        BY         C        DATE     MENT           C           DATE            REMARKS
                                                  O                                O      
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NG FORM 4288, JUL 98                                   SPECSINTACT                                           PAGE 5 OF 8 PAGES
</TABLE> 
<PAGE>

<TABLE> 
<CAPTION> 
- -----------------------------------------------------------------------------------------------------------------------------------
                                                        SUBMITTAL REGISTER
                                                           (ER415 1-10)
- -----------------------------------------------------------------------------------------------------------------------------------
TITLE AND LOCATION                                                         
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT                             
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                         TYPE OF SUBMITTAL                        CLASSI-    
                                                                                                                 FICATION    
                                                                    ------------------------------------------------------

                                                                         I                   C                                    
   A                                                                     N                   E             O    I                 
   C                                                                     S         S         R             &    N      G          
   T                                                                     T    S    T         T             M    F      O          
   I                                                                D    R    C    A         I                  O      V A    R   
   V    TRANS-   I   SPECIFICATION                                  R    U    H    T    R    F   S    R    M    R      E P    E   
   I    MITTAL   T     PARAGRAPH    DESCRIPTION OF                  A    C    E    E    E    I   A    E    A    M      R P    V   
   T      NO.    E       NUMBER     ITEM SUBMITTED                  W    T    D    M    P    C   M    C    N    A      N R    I   
   Y             M                                             D    I    I    U    E    O    A   P    O    U    T O    M O    E   
                                                               A    N    O    L    N    R    T   L    R    A    I N    E V    W   
   N             N                                             T    G    N    E    T    T    E   E    D    L    O L    N E    E   
   O             O                                             A    S    S    S    S    S    S   S    S    S    N Y    T D    R   
   a.     b.     c.       d.              e.                   f.   g.   h.   i.   j.   k.   l.  m.   n.   o.    p.     q.    r.  
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<S>     <C>      <C> <C>       <C>                             <C>  <C>  <C>  <C>  <C>  <C>  <C> <C>  <C>  <C>  <C>    <C>    <C> 
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                         1.1   Plant and Equipment                             X                                 X             E
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                                                                                     DACW33-98-C-00
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CONTRACTOR                                                                           SPECIFICATION  SECTION
                                                                                            01600                         
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            CONTRACTOR                            CONTRACTOR                         GOVERNMENT 
            SCHEDULE DATES                          ACTION                              ACTION   
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                                                            SUBMIT  
              APPROVAL       MATERIAL                         TO       
               NEEDED         NEEDED                        GOVERN- 
SUBMIT          BY              BY               DATE        MENT                 DATE            REMARKS    
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  s.             t.             u.         v.     w.           x.          y.       z.               aa.
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<PAGE>
 
<TABLE> 
<CAPTION> 
- -----------------------------------------------------------------------------------------------------------------------------------
                                                        SUBMITTAL REGISTER
                                                           (ER415 1-10)
- -----------------------------------------------------------------------------------------------------------------------------------
TITLE AND LOCATION                                                         
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT                             
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                                                                         TYPE OF SUBMITTAL                        CLASSI-    
                                                                                                                 FICATION    
                                                                    ------------------------------------------------------

                                                                         I                   C                                    
   A                                                                     N                   E             O    I                 
   C                                                                     S         S         R             &    N      G          
   T                                                                     T    S    T         T             M    F      O          
   I                                                                D    R    C    A         I                  O      V A    R   
   V    TRANS-   I   SPECIFICATION                                  R    U    H    T    R    F   S    R    M    R      E P    E   
   I    MITTAL   T     PARAGRAPH      DESCRIPTION                   A    C    E    E    E    I   A    E    A    M      R P    V   
   T      NO.    E       NUMBER     ITEM SUBMITTED                  W    T    D    M    P    C   M    C    N    A      N R    I   
   Y             M                                             D    I    I    U    E    O    A   P    O    U    T O    M O    E   
                                                               A    N    O    L    N    R    T   L    R    A    I N    E V    W   
   N             N                                             T    G    N    E    T    T    E   E    D    L    O L    N E    E   
   O             O                                             A    S    S    S    S    S    S   S    S    S    N Y    T D    R   
   a.     b.     c.       d.              e.                   f.   g.   h.   i.   j.   k.   l.  m.   n.   o.    p.     q.    r.  
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<S>     <C>      <C> <C>       <C>                             <C>  <C>  <C>  <C>  <C>  <C>  <C> <C>  <C>  <C>  <C>    <C>    <C> 
                         1.6   Inspection of Disposal          X                                                 X            C
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                         1.3   Scow Cards                      X                                                        X     C
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                         1.3   Disposal Positioning Plan       X                                                        X     C
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                         1.3   Work Plan                       X                                                        X     E
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                         1.3   Cell Cappimg Plan               X                                                        X     E
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                         1.3   Cell Cap Thickness and Coverage X                                                        X     E
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                                 Determination Data               
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                         1.3   MWRA Water Tunnel Removal Plan  X                                                        X     E
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                         1.3   Abandoned Cable - Boston Edison X                                                        X     E
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                                                                                     CONTRACT NO.
                                                                                     DACW33-98-C-00
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CONTRACTOR                                                                           SPECIFICATION SECTION
                                                                                            02482                                   
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            SCHEDULE DATES                          ACTION                              ACTION   
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                                                            SUBMIT  
              APPROVAL       MATERIAL                         TO       
               NEEDED         NEEDED                        GOVERN- 
SUBMIT          BY              BY               DATE        MENT                 DATE            REMARKS    
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  s.             t.             u.         v.     w.           x.          y.       z.               aa.
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NG FORM 4288, JUL 98                              SPECSINTACT                               PAGE 7 OF PAGES 
</TABLE> 

<PAGE>
 
<TABLE> 
<S>                                   <C> 
- ------------------------------------------------------------------------------------------------------------------------------------
                                      SUBMITTAL REGISTER                                   
                                          (ER415 1-10)                                     
- ----------------------------------------------------------------------------------------------------------------
TITLE AND LOCATION                                                 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT                             
- ----------------------------------------------------------------------------------------------------------------
                                                                               TYPE OF SUBMITTAL      CLASSI-                      
                                                                                                     FICATION                      
                                                                           -------------------------------------

                                                                                 I           C                                   
     A                                                                           N           E        O   I                      
     C                                                                           S     S     R        &   N     G                
     T                                                                           T  S  T     T        M   F     O                
     I                                                                           R  C  A     I            O     V  A   R 
     V    TRANS-   I   SPECIFICATION                                         D   U  H  T  R  F  S  R  M   R     E  P   E 
     I    MITTAL   T     PARAGRAPH         DESCRIPTION OF                    R   C  E  E  E  I  A  E  A   M     R  P   V 
     T      NO.    E       NUMBER          ITEM SUBMITTED                    A   T  D  M  P  C  M  C  N   A     N  R   I      
     Y             M                                                     D   W   I  U  E  O  A  P  O  U   T O   M  O   E 
                                                                         A   I   O  L  N  R  T  L  R  A   I N   E  V   W 
     N             N                                                     T   N   N  E  T  T  E  E  D  L   O L   N  E   E 
     O             O                                                     A   G   S  S  S  S  S  S  S  S   N Y   T  D   R 
     a.     b.     c.        d.                 e.                       f.  g.  h. i. j. k. l. m. n. o.   p.    q.    r.     
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                       1.6.2            Blasting Safety Plan                           X                   X          E
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                       1.6.3            Licenses                         X                                 X          C
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                       1.6.4            Daily Blasting Log                                         X       X          C
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                       3.1.1            Preblast Survey                                   X                X          E
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                       3.2.1            Test Blast Program                                X                X          E
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<CAPTION> 
                                                                                               CONTRACT NO.
                                                                                               DACW33-98-C-00
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CONTRACTOR                                                                                     SPECIFICATION SECTION
                                                                                                       02491
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                         CONTRACTOR                        CONTRACTOR                       GOVERNMENT
                       SCHEDULE DATES                        ACTION                            ACTION
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                          APPROVAL  MATERIAL                         TO                   
                           NEEDED    NEEDED                        GOVERN-                
     SUBMIT                  BY        BY         C        DATE     MENT           C           DATE            REMARKS
                                                  O                                O      
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NG FORM 4288, JUL 98                                   SPECSINTACT                                           PAGE 8 OF 8 PAGES
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<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

 

                           SECTION TABLE OF CONTENTS

                      DIVISION 01 - GENERAL REQUIREMENTS

                                 SECTION 01440

                          CONTRACTOR QUALITY CONTROL



PART 1  GENERAL
 
     1.1  PAYMENT

PART 2  PRODUCTS (Not Applicable)


PART 3  EXECUTION

     3.1  GENERAL
     3.2  QUALITY CONTROL PLAN
       3.2.1  General
       3.2.2  Content of the CQC Plan
       3.2.3  Acceptance of Plan
       3.2.4  Notification of Changes
     3.3  IMPLEMENTATION OF GOVERNMENT RESIDENT MANAGEMENT SYSTEM FOR CONTRACTOR
          QUALITY CONTROL OF CONTRACT
     3.4  COORDINATION MEETING
     3.5  QUALITY CONTROL ORGANIZATION
       3.5.1  General
       3.5.2  CQC System Manager
       3.5.3  CQC Personnel
       3.5.4  Additional Requirement
       3.5.5  Organizational Changes
     3.6  SUBMITTALS
     3.7  CONTROL
       3.7.1  Preparatory Phase
       3.7.2  Initial Phase
       3.7.3  Follow-up Phase
       3.7.4  Additional Preparatory and Initial Phases
     3.8  TESTS
       3.8.1  Testing Procedure
       3.8.2  Testing Laboratories
         3.8.2.1  Capability Check
         3.8.2.2  Capability Recheck
       3.8.3  On-Site Laboratory
       3.8.4  Furnishing or Transportation of Samples for Testing
     3.9  COMPLETION INSPECTION
     3.10 DOCUMENTATION
     3.11 SAMPLE FORMS
     3.12 NOTIFICATION OF NONCOMPLIANCE

- -- End of section Table of Contents --

                    SECTION TABLE OF CONTENTS 01440  PAGE 1

<PAGE>
 
BOSTON HARBOUR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


                                 SECTION 01440

                          CONTRACTOR QUALITY CONTROL

PART 1 GENERAL

1.1  PAYMENT

  Separate payment will not be made for providing and maintaining an effective 
  Quality Control program, and all costs associated therewith shall be included
  in the applicable unit prices of lump-sum prices contained in the Bidding
  Schedule.

PART 2  PRODUCTS (Not Applicable)

PART 3  EXECUTION

3.1  GENERAL

  The Contractor is responsible for quality control and shall establish and
  maintain an effective quality control system in compliance with the Contract
  Clause entitled "Inspection of Construction." The quality control system shall
  consist of plans, procedures, and organization necessary to produce an end
  product which complies with the contract requirements. The system shall cover
  all constuction operations, both onsite and offsite, and shall be keyed to the
  proposed construction sequence. The project superintendent will be held
  responsible for the quality of work on the job and is subject to removal by
  the Contracting Officer for non-compliance with quality requirements specified
  in the contract. The project superintendent in this context shall mean the
  individual with the responsibility for the overall management of the project
  including quality and production.

3.2  QUALITY CONTROL PLAN

3.2.1  General

  The Contractor shall furnish for review by the Government, not later than 15 
  days after receipt of notice to proceed, the Contractor Quality Control (CQC)
  Plan proposed to implement the requirements of the Contract Clause entitled
  "Inspection of Construction." The plan shall indentify personnel, procedures,
  control, instructions, test, records, and forms to be used. The Government
  will consider an interim plan for the first 14 days of operation. Construction
  will be permitted to begin only after acceptance of the CQC Plan or acceptance
  of an interim plan applicable to the particular feature of work to be started.
  Work outside of the features of work included in an accepted interim plan will
  not be permitted to begin until acceptance of a CQC Plan or another interim
  plan containing the additional features of work to be started.

3.2.2   Content of the CQC Plan

  The CQC Plan shall include, as a minimum, the following to cover all 
  construction operations, both onsite and offsite, including work by
  subcontractors, fabricators, suppliers, and purchasing agents:

     a.   A description of the quality control organization, including a chart 
          showing lines of authority and acknowledgment that the CQC staff shall
          implement the three phase control system for all aspects of the work
          specified. The staff shall include a CQC System Manager who shall
          report to the project superintendent.

                             SECTION 01440 Page 1

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BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

     b. The name, qualifications (in resume format), duties, responsibilities, 
        and authorities of each person assigned a CQC function.

     c. A copy of the letter to the CQC System Manager signed by an authorized 
        official of the firm which describes the responsibilities and delegates
        sufficient authorities to adequately perform the functions of the CQC
        System Manager, including authority to stop work which is not in
        compliance with the contract. The CQC Systems Manager shall issue
        letters of direction to all other various quality control
        representatives outlining duties, authorities, and responsibilities.
        Copies of these letters will also be furnished to the Government.

     d. Procedures for scheduling, reviewing, certifying, and managing
        submittals, including those of subcontractors, offsite fabricators,
        suppliers, and purchasing agents. These procedures shall be in
        accordance with Section 01300 SUBMITTAL PROCEDURES.

     e. Control, verification, and acceptance testing procedures for each 
        specific test to include the test name, specification paragraph
        requiring test, feature of work to be tested, test frequency, and person
        responsible for each test. (Laboratory facilities will be approved by
        the Contracting Officer.)

     f. Procedures for tracking preparatory, initial, and follow-up control 
        phases and control, verification, and acceptance tests including 
        documentation.

     g. Procedures for tracking construction deficiencies from identification 
        through acceptable corrective action. These procedures will establish 
        verification that identified deficiencies have been corrected.

     h. Reporting procedures, including proposed reporting formats. See 
        paragraph IMPLEMENTATION OF GOVERNMENT RESIDENT MANAGEMENT SYSTEM FOR
        CONTRACTOR QUALITY CONTROL OF CONTRACT below.

     i. A list of the definable features of work. A definable feature of work is
        a task which is separate and distinct from other tasks and has separate
        control requirements. It could be identified by different trades or
        disciplines, or it could be work by the same trade in a different
        environment. Although each section of the specifications may generally
        be considered as a definable feature of work, there are frequently more
        than one definable feature under a particular section. This list will be
        agreed upon during the coordination meeting.

3.2.3  Acceptance of Plan

  Acceptance of the Contractor's plan is required prior to the start of 
  construction. Acceptance is conditional and will be predicated on satisfactory
  performance during the construction. The Government reserves the right to
  require the Contractor to make changes in his CQC Plan and operations
  including removal of personnel, as necessary, to obtain the quality specified.

3.2.4  Notification of Changes

  After acceptance of the CQC Plan, the Contractor shall notify the Contracting 
  Officer in writing of any proposed change. Proposed changes are subject to 
  acceptance by the Contracting Officer.

3.3    IMPLEMENTATION OF GOVERNMENT RESIDENT MANAGEMENT SYSTEM FOR CONTRACTOR 
QUALITY CONTROL OF CONTRACT

                             SECTION 01440 Page 2
 

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

   The Contractor shall utilize a Government furnished CQC Programming Module (A
   computerized executable file which is DOS based and operates on a minimum of
   80386 IBM compatible computer and uses an HP3 Laserjet or later printer). The
   module includes a daily CQC Reporting System form which also must be used.
   This form may be in addition to other Contractor desired reporting forms.
   However, all other such reporting forms shall be consolidated into this one
   Government specified Daily CQC Report Form.

   The Contractor will also be required to complete Government-Furnished Module
   elements which include, but is not limited to, subcontractor codes, planned
   cumulative progress earnings, subcontractor information showing trade, name,
   address, point-of-contact, and insurance expiration dates, definable features
   of work, pay activity and activity information, required Quality Control
   tests tied to individual activities, planned User Schooling tied to specific
   specification paragraphs and contractor activities, Installed Property
   Listing, Transfer Property Listing and Submittal information relating to
   specification section, description, activity number, review period and
   expected procurement period. The sum of all activity values shall equal the
   contract amount, and all Bid Items, Options and Additives shall be separately
   identified, in accordance with the "Bidding Schedule". Bid Items may include
   multiple Activities, but Activities may only be assigned to one such Bid
   Item. This Module shall be completed to the satisfaction of the Contracting
   Officer prior to any contract payment (except of Bonds, Insurance and/or
   Mobilization, as approved by the Contracting Officer) and shall be updated as
   require.

     (1)  During the course of the contract, the Contractor will receive various
     Quality Assurance comments from the Government that will reflect
     corrections needed to Contractor activities or reflect outstanding or
     future items needing the attention of the Contractor. The Contractor will
     acknowledge receipt of these comments by specific number reference on his
     Daily CQC Report, and will also reflect on his Daily CQC Report when these
     items are specifically completed or corrected to permit Government
     verification.

     (2)  The Contractor's schedule system shall include, as specific and 
     separate activities, all Preparatory Phase Meeting (inspection), all O&M
     Manuals and all Test Plans of Electrical and Mechanical Equipment or
     Systems that require validation testing or instructions to Government
     representatives.

3.4  COORDINATION MEETING

  After the Preconstruction Conference, before start of construction, and prior 
  to acceptance by the Government of the CQC Plan, the Contractor shall meet
  with the Contracting Officer or Authorized Representative and discuss the
  Contractor's quality control system. The CQC Plan shall be submitted for
  review a minimum of 15 calendar days prior to the Coordination Meeting. During
  the meeting, a mutual understanding of the system details shall be developed,
  including the forms for recording the CQC operations, control activities,
  testing, administration of the system for both onsite and offsite work, and
  the interrelationship of Contractor's Management and control with the
  Government's Quality Assurance. Minutes of the meeting shall be prepared by
  the Government and signed by both the Contractor and the Contracting Officer.
  The minutes shall become a part of the contract file. There may be occasions
  when subsequent conferences will be called by either party to reconfirm
  mutual understandings and/or address deficiencies in the CQC system or
  procedures which may require corrective action by the Contractor.

3.5  QUALITY CONTROL ORGANIZATION

3.5.1  General

                             SECTION 01440 Page 3


<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  The requirements for the CQC organization are a CQC System Manager and 
  sufficient number of additional qualified personnel to ensure contract
  compliance. The Contractor shall provide a CQC organization which shall be at
  the site at all times during progress of the work and with the complete
  authority to take any action necessary to ensure compliance with the contract.
  All CQC staff members shall be subject to acceptance by the Contracting
  Officer.

3.5.2   CQC System Manager
  
  The Contractor shall identify as CQC System Manager an individual within his
  organization at the site of the work who shall be responsible for overall
  management of CQC and have the authority to act in all CQC matters for the
  Contractor. The CQC System Manager shall have a minimum of five years
  construction experience on construction similar to this contract. This CQC
  System Manager shall be on the site at all times during construction and will
  be employed by the prime Contractor. The CQC System Manager shall be assigned
  as System Manager but may have duties as project superintendent in addition to
  quality control. An alternate for CQC System Manager will be identified in the
  plan to serve in the event of the System Manager's absence. The requirements
  for the alternate will be the same as for the designated CQC System Manager.

3.5.3   CQC Personnel

3.5.4.  Additional Requirement

  In addition to the above experience and education requirements the CQC System 
  Manager shall have completed the course entitled "Construction Quality 
  Management For Contractors." This course is periodically offered at the Corps
  of Engineers New England District Office. Call Ms. Joan Garder at (978) 318-
  8286 for information on the course.

3.5.5   Organizational Changes

  The Contractor shall maintain his CQC at full strength at all times. When it 
  is necessary to make changes to the CQC staff the Contractor shall revise the
  CQC Plan to reflect the changes and submit the changes to the Contracting
  Officer for acceptance.

3.6  SUBMITTALS

  Submittals shall be made as specified in Section 01300 SUBMITTAL PROCEDURES. 
  The CQC organization shall be responsible for certifying that all submittals
  are in compliance with the contract requirements.
  
3.7  CONTROL

  Contractor Quality Control is the means by which the Contractor ensures that 
  the construction, to include that of subcontractors and suppliers, complies
  with the requirements of the contract. At least three phases of control shall
  be conducted by the CQC System Manager for each definable feature of work as
  follows:

3.7.1   Preparatory Phase

  This phase shall be performed prior to beginning work on each definable
  feature of work, after all required plans/documents/materials are
  approved/accepted, and after copies are at the work site. This phase shall
  include:

     a.   A review of each paragraph of applicable specifications.

     b.   A review of the contract drawings.

                             SECTION 01440 Page 4

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

     c. A check to assure that all materials and/or equipment have been tested,
        submitted, and approved.

     d. Review of provisions that have been made to provide required control
        inspection and testing.

     e. Examination of the work area to assure that all required preliminary 
        work has been completed and is in compliance with the contract and
        verification of the dredging limits with the Contracting Officer and the
        berth owners.

     f. A physical examination of required materials and equipment to assure
        that they are on hand, conform to approved shop drawings or submitted
        data, and are properly stored.

     g. A review of the appropriate activity hazard analysis to assure safety 
        requirements are met.

     h. Discussion of procedures for controlling quality of the work including 
        repetitive deficiencies. Document construction tolerances and
        workmanship standards for that feature of work.

     i. A check to ensure that the portion of the plan for the work to be 
        performed has been accepted by the Contracting Officer.

     j. Discussion of the initial control phase.

     k. The Government shall be notified at least 24 hours in advance of
        beginning the preparatory control phase. This phase shall include a
        meeting conducted by the CQC System Manager and attened by the
        superintendent, other CQC personnel (as applicable), and the foreman
        responsible for the definable feature. The results of the preparatory
        phase actions shall be documented by separate minutes prepared by the
        CQC System Manager and attached to the daily CQC report. The Contractor
        shall instruct applicable workers as to the acceptable level of
        workmanship required in order to meet contract specifications.

     1. That all required permits have been obtained and plans for 
        implementation are in place and reviewed.

3.7.2 Initial Phase

  This phase shall be accomplished at the beginning of a definable feature of 
  work. The following shall be accomplished.

     a. A check of work to ensure that it is in full compliance with contract 
        requirements. Review minutes of the preparatory meeting.

     b. Verify adequacy of controls to ensure full contract compliance. Verify 
        required control inspection and testing.

     c. Establish level of workmanship and verify that it meets minimum
        acceptable workmanship standards. Compare with required sample panels as
        appropriate.

     d. Resolve all differences.

     e. Check safety to include compliance with and upgrading of the safety plan
        and activity hazard analysis. Review the activity analysis with each
        worker.

     f. The Government shall be notified at least 24 hours in advance of 
        beginning the initial phase. Separate minutes of this phase shall be
        prepared by the CQC System Manager and attached to the daily

                             SECTION 01440 Page 5



<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

          CQC report. Exact location of initial phase shall be indicated for 
          future reference and comparision with follow-up phases.

     g.   The initial phase should be repeated for each new crew to work onsite,
          or any time acceptable specified quality standards are not being met.

3.7.3   Follow-up Phase

  Daily checks shall be performed to assure control activities, including
  control testing, are providing continued compliance with contract
  requirements, until completion of the particular feature of work. The checks
  shall be made a matter of record in the CQC documentation. Final follow-up
  checks shall be conducted and all deficiencies corrected prior to the start of
  additional features of work which may be affected by the deficient work. The
  Contractor shall not build upon or conceal non-conforming work.

3.7.4   Additional Preparatory and Initial Phases

  Additional preparatory and initial phases shall be conducted on the same
  definable features of work if the quality of on-going work is unacceptable, if
  there are changes in the applicable CQC staff, onsite production supervision
  or work crew, if work on a definable feature is resumed after a substantial
  period of inactivity, or if other problems develop.

3.8   TESTS

3.8.1   Testing Procedure

  The Contractor shall perform specified or required tests to verify that
  control measures are adequate to provide a product which conforms to contract
  requirements. Upon request, the Contractor shall furnish to the Government
  duplicate samples of test specimens for possible testing by the Government.
  Testing includes operation and/or acceptance tests when specified. The
  Contractor shall procure the services of a Corps of Engineers approved testing
  laboratory or establish an approved testing laboratory at the project site.
  The Contractor shall perform the following activities and record and provide
  the following data:

     a.   Verify that testing procedures comply with contract requirements.

     b.   Verify that facilities and testing equipment are available and
          comply with testing standards.

     c.   Check test instrument calibration data against certified
          standards.

     d.   Verify that recording forms and test identification control number
          system, including all of the test documentation requirements, have
          been prepared.

     e.   Results of all tests taken, both passing and failing tests, will be
          recorded on the CQC report for the date taken. Specification paragraph
          reference, location where tests were taken, and the sequential control
          number identifying the test will be given. If approved by the
          Contracting Officer, actual test reports may be submitted later with a
          reference to the test number and date taken. An information copy of
          tests performed by an offsite or commercial test facility will be
          provided directly to the Contracting Officer. Failure to submit timely
          test reports as stated may result in nonpayment for related work
          performed and disapproval of the test facility for this contract.

3.8.2   Testing Laboratories     

                             SECTION 01440 Page 6
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

3.8.2.1   Capability Check

     The Government reserves the right to check laboratory equipment in the
     proposed laboratory for compliance with the standards set forth in the
     contract specifications and to check the laboratory technician's testing
     procedures and techniques. Laboratories utilized for testing soils, water,
     biological organisms concrete, asphalt, and steel shall meet criteria
     detailed in Section 01135 WATER QUALITY MONITORING AND CONTROL.

3.8.2.2   Capability Recheck

     If the selected laboratory fails the capability check, the Contractor will
     be assessed a charge of $300.00 to reimburse the Government for each
     succeeding recheck of the laboratory of the checking of a subsequently
     selected laboratory. Such costs will be deducted from the contract amount
     due the Contractor.

3.8.3     On-Site Laboratory

     The Government reserves the right to utilize the Contractor's control
     testing laboratory and equipment to make assurance tests and to check the
     Contractor's testing procedures, techniques, and test results at no
     additional cost to the Government.

3.8.4     Furnishing or Transportation of Samples for Testing

     Costs incidental to the transportation of samples or materials will be
     borne by the Contractor. Samples of materials for test verification and
     acceptance testing by the Government shall be delivered to the Corps of
     Engineers District 696 Virginia Road, Concord, Massachusetts 01742-2751.

     Coordination for each specific test, exact delivery location, and dates
     will be made through the Contracting Officer.

3.9  COMPLETION INSPECTION

     At the completion of all work or any increment thereof established by a
     completion time stated in the Contract, the CQC System Manager shall
     conduct an inspection of the work and develop a list of items which do not
     conform to the approved drawings and specifications. Such a list of
     deficiencies shall be included in the CQC documentation, as required by
     paragraph DOCUMENTATION below, and shall include the estimated date by
     which the deficiencies will be corrected. The CQC System Manager or staff
     shall make a second inspection to ascertain that all deficiencies have been
     corrected and so notify the Contracting Officer. These inspections and any
     deficiency corrections required by this paragraph will be accomplished
     within the time stated for completion of the entire work.

3.10 DOCUMENTATION

     The Contractor shall maintain current records providing factual evidence
     that required quality control activities and/or tests have been performed.
     These records shall include the work of subcontractors and suppliers and
     shall be on an acceptable form that includes as a minimum, the following
     information:

     a.   Contractor/subcontractor and their area of responsibility.

     b.   Operating plan/equipment with hours worked, idle, or down for repair.

     c.   Work performed each day, giving location, description, and by whom.
          When Network Analysis (NAS) is used, identify each phase of work
          performed each day by NAS activity number.

                             SECTION 01440 Page 7
<PAGE>
 
 BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

     d.   Test and/or control activities performed with results and references
          to specifications/drawings requirements. The control phase should be
          identified (Preparatory, Initial, Follow-up). List deficiencies noted
          along with corrective action.

     e.   Quantity of materials received at the site with statement as to
          acceptability, storage, and reference to specifications/drawings
          requirements.

     f.   Submittals reviewed, with contract reference, by whom, and action
          taken.

     g.   Off-site surveillance activities, including actions taken.

     h.   Job safety evaluations stating what was checked, results, and 
          instructions or corrective actions.

     i.   Instructions given/received and conflicts in plans and/or 
          specifications.
         
     j.   Contractor's verification statement.

  These records shall indicate a description of trades working on the project;
  the number of personnel working; weather conditions encountered; and any
  delays encountered. These records shall cover both conforming and deficient
  features and shall include a statement that equipment and materials
  incorporated in the work and workmanship comply with the contract. The
  original and one copy of these records in report form shall be furnished to
  the Government daily within 24 hours after the date(s) covered by the report,
  except that reports need not be submitted for days on which no work is
  performed. As a minimum, one report shall be prepared and submitted for every
  seven days of no work and on the last day of no a work period. All calendar
  days shall be accounted for throughout the life of the contract. The first
  report following a day of no work shall be for that day only. Reports shall be
  signed and dated by the CQC System Manager. The report from the CQC System
  Manager shall include copies of test reports and copies of reports prepared by
  all subordinate quality control personnel.

3.11   SAMPLE FORMS

  Sample forms are enclosed at the end of this section. The Contractor may use
  his own forms, provided they are of similar detail and are approved by the
  Contracting Officer. The Contractor shall create his forms to be compatble
  with the Government furnished CQC Programming Module specified above in
  paragraph "IMPLEMENTATION OF GOVERNMENT RESIDENT MANAGEMENT SYSTEM FOR
  CONTRACTOR QUALITY CONTROL OF CONTRACT."

3.12   NOTIFICATION OF NONCOMPLIANCE

  The Contracting Officer will notify the Contractor of any detected
  noncompliance with the foregoing requirements. The Contractor shall take
  immediate corrective action after receipt of such notice. Such notice, when
  delivered to the Contractor at the worksite, shall be deemed sufficient for
  the purpose of notification. If the Contractor fails or refuses to comply
  promptly, the Contracting Officer may issue an order stopping all or part of
  the work until satisfactory corrective action has been taken. No part of the
  time lost due to such stop orders shall be made the subject of claim for
  extension of time or for excess costs or damages by the Contractor

       -- End of Section --


                             SECTION 01440 Page 8


  






  



<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

Contractor/Sub. Name _____________________________________________________

DAILY CONSTRUCTION QUALITY CONTROL REPORT FOR WORK IN FEDERAL CHANNEL
- ---------------------------------------------------------------------
                                                            Date: ___________
                                                            Day: ____________

   Contract No: _________________                                            
   Description and Location of Work:_________________________________________
   __________________________________________________________________________
   Tide: (high)        (low)     (high)    (low)     Sea Condition:          
         ----------------------------------------------------------          
   Weather: Temp:           Cloud condition          Wind speed/direction    
            -------------------------------------------------------------    
   Environmental Protection:                                                
   Management                                   Area of responsibility       
   a.   Consultant - ________________________________________________________
   b.   Contractor - ________________________________________________________
   c.   Subcontractor - _____________________________________________________
   d.   Surveyor - __________________________________________________________
   e.   Supplier - __________________________________________________________
   f.   Technical Support - _________________________________________________
                                                                             
   1.   WORK PERFORMED TODAY (Indicate location and description of work      
   performed. Refer to work performed by individuals listed by letter        
   above.)___________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
                                                                             
   2.   Results of Surveillance (Include satisfactory work completed, or     
   deficiencies with action to be taken.)                                     

a.  Preparatory Inspection: _________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   b. Initial Inspection: ___________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________ 
   c. Follow-up Inspection: _________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________ 

   3. Tests Required by Specifications, Performed and the Results:

   a.  ______________________________________________________________________
   b.  ______________________________________________________________________
   c.  ______________________________________________________________________

                             SECTION 01440 Page 9
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

   4. Verbal Instruction Received; (List any instructions given by Government 
   personnel on construction deficiencies, retesting required, etc. and 
   action.)
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________   

   5. Remarks: (Cover all conflicts in plans, specifications, or 
   instructions.)
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________

   6. Safety Inspection (Report violations, corrective instruction
   given; and corrective actions taken.)
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________

7. Quantities Completed;
Item #                                  Item #
Quantity:                               Quantity:
- -----------------------------------------------------------------------------
Item #                                  Item #
Quantity:                               Quantity:
- -----------------------------------------------------------------------------
8. Time
#              LABOR       HOURS        EQUIPMENT
               -----       -----        ---------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
9. Additional Comments:
 
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   Contractor's Verification: The above report is complete and correct and 
   all material and equipment used and work performed during this reporting
   period are in compliance with the contract plans and specifications
   except as noted above.


 ___________________________________
                                 Contractor Quality Control
 Representative

                             SECTION 01440 Page 10


<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

Contractor/Sub. Name _____________________________________________________

DAILY CONSTRUCTION QUALITY CONTROL REPORT FOR WORK AT NON- FEDERAL BERTHS
- -------------------------------------------------------------------------
                                                            Date: ___________
                                                            Day: ____________

   Contract No: _________________                                            
   Description and Location of Work:_________________________________________
   __________________________________________________________________________
   Tide: (high)        (low)     (high)    (low)     Sea Condition:          
         ----------------------------------------------------------          
   Weather: Temp:           Cloud condition          Wind speed/direction    
            -------------------------------------------------------------    
   Environmental Protection:                                                
   Management                                   Area of responsibility       
   a.   Consultant - ________________________________________________________
   b.   Contractor - ________________________________________________________
   c.   Subcontractor - _____________________________________________________
   d.   Surveyor - __________________________________________________________
   e.   Supplier - __________________________________________________________
   f.   Technical Support - _________________________________________________
                                                                             
   1.   WORK PERFORMED TODAY (Indicate location and description of work      
   performed. Refer to work performed by individuals listed by letter        
   above.)___________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
                                                                             
   2.   Results of Surveillance (Include satisfactory work completed, or     
   deficiencies with action to be taken.)                                     

a.  Preparatory Inspection: _________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   b. Initial Inspection: ___________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________ 
   c. Follow-up Inspection: _________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________ 

   3. Tests Required by Specifications, Performed, and the Results:

   a.  ______________________________________________________________________
   b.  ______________________________________________________________________
   c.  ______________________________________________________________________

                             SECTION 01440 Page 11

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

   4. Verbal Instruction Received; (List any instructions given by Government 
   personnel on construction deficiencies, retesting required, etc. and 
   action.)
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________   

   5. Remarks: (Cover all conflicts in plans, specifications, or 
   instructions.)
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________

   6. Safety Inspection (Report violations, corrective instruction
   given; and corrective actions taken.)
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________

7. Quantities Completed;
Item #                                  Item #
Quantity:                               Quantity:
- -----------------------------------------------------------------------------
Item #                                  Item #
Quantity:                               Quantity:
- -----------------------------------------------------------------------------
8. Time
#              LABOR       HOURS        EQUIPMENT
               -----       -----        ---------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
9. Additional Comments:
 
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   __________________________________________________________________________
   Contractor's Verification: The above report is complete and correct and 
   all material and equipment used and work performed during this reporting
   period are in compliance with the contract plans and specifications
   except as noted above.


 ___________________________________
                                 Contractor Quality Control
 Representative

                             SECTION 01440 Page 12

<PAGE>
 
Daily Berth Dredging Log

Date:

<TABLE> 
<CAPTION> 
- ------------------------------------------------------------------------------------------------------------------------------------
Berth               Est. Soft Material       Disposal Cell Used       Est. Hard Material       Est. Debris         Remarks
                     Dredged This Date                                Dredged This Date       Removed (Tons)
                           (CY)1                                            (CY)1
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                 <C>                      <C>                      <C>                     <C>                  <C> 
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE> 

1. Quantity, prior to post dredge survey, shall be estimated using visual
observation unless survey data is available. The remarks column must indicate
the method used to estimate quantities.

<PAGE>
 
                 INSPECTOR'S DAILY REPORT OF DISPOSAL BY SCOW

Permittee______________________________   Disposal Area________________________

Permit/Contract No. ___________________   Date_________________________________

Project________________________________   Towboat______________________________

Dredging Contractor____________________   Owner________________________________

<TABLE> 
<CAPTION> 
Trip    Scow    Started    From    Disposal     Returned To     Round     Trip       Loran C or Lat/Long Coord.*  Dist./Dir.
No.      No.     Place     Time      Time       Place  Time      Time     Dist.         Specified     Actual      From Buoy
- ----------------------------------------------------------------------------------------------------------------------------
<S>     <C>     <C>        <C>     <C>          <C>             <C>        <C>       <C>
                                                                                     ------------------------------
                                                                                     ------------------------------
- ----------------------------------------------------------------------------------------------------------------------------
                                                                                     ------------------------------
                                                                                     ------------------------------
- ----------------------------------------------------------------------------------------------------------------------------
Trip     No. Pockets       Reason Pocket          Disposal                             Sea Conditions/  Scow Load   Scow      
No.     Loaded Dumped        Not Dumped         Depth  Speed       Weather               Visibility     (Cu. Yds.)  Draft 
- ----------------------------------------------------------------------------------------------------------------------------

- ----------------------------------------------------------------------------------------------------------------------------

- ----------------------------------------------------------------------------------------------------------------------------

- ----------------------------------------------------------------------------------------------------------------------------
Comments:


*Use Loran C values unless unavailable.
- ----------------------------------------------------------------------------------------------------------------------------

- ----------------------------------------------------------------------------------------------------------------------------
Time on          Time off      Hours on Duty                                                    Reviewed By
- ----------------------------------------------                                          Permittee's Representative/
- ----------------------------------------------                                              Resident Inspector
- ----------------------------------------------------------------------------------------------------------------------------

Total Hours on Duty
- ----------------------------------------------------------------------------------------------------------------------------
</TABLE> 

To the Division Engineer, US Army Engineer Division, New England, Waltham, MA: I
certify that I informed the tug captain of the conditions of the U.S. Army corps
of Engineers permit regarding the distance from the buoy and the speed of scow 
during the release of the dredged material. I also informed the captain that 
failure to comply with these conditions would constitute a violation of the 
permit and would be reported to the Corps. I certify that this report is correct
and that I am not an employee of the dredging or towing firm, or the permittee, 
nor have I been employed by any of them at any time during the past 6 months.

                         ______________________________  ____________________
                            (Signature of Inspector)      (Certification No.)


     Print Name Here:_____________________________________________

<PAGE>
 
                                SCOW LOAD CARD

 TRIP#              DATE                      SCOW#

 MEASUREMENTS AT THE JOB                 MEASUREMENTS AT THE DUMP

POCKET#   DEPTH  CU. YARDS               POCKET#  DEPTH  CU. YARDS

          ------                                  ------
     1                                       1
          --------------                          --------------

          ------                                  ------
     2                                       2
          --------------                          --------------

          ------                                  ------
     3                                       3
          --------------                          --------------

          ------                                  ------
     4                                       4
          --------------                          --------------

          ------                                  ------
     5                                       5
          --------------                          --------------

          ------                                  ------
     6                                       6
          --------------                          --------------

          ------                                  ------
     7                                       7
          --------------                          --------------

   TOTAL CU. YARDS _____                   TOTAL CU. YARDS _____


NOTE: THE DEPTH IS THE DISTANCE BETWEEN THE TOP OF THE COMBING 
       MEASURED DOWN TO THE MATERIAL IN THE POCKET IN TENTHS.

        PLEASE STAPLE THIS AND THE COMPUTER PRINTOUT TO THE 
        INSPECTORS DUMP LOG BY THE TRIP NUMBER.










<PAGE>
 
<TABLE> 
<CAPTION> 
                                                                 -------------------------------------------------------------------
                         ENGINE LOG                                  SERVICE ENGINE          GENERATOR              PUMP
- ------------------------------------------------------------------------------------------------------------------------------------
TIME    R.P.M.   OIL     FUEL      OIL    WATER           DRIVE
                PRESS.  PRESS.    TEMP    TEMP    AMP      OIL     OIL    WATER    FUEL    CYCLES     VOLTS     BEARING    PACKING
- ------------------------------------------------------------------------------------------------------------------------------------
<S>     <C>     <C>     <C>       <C>     <C>     <C>     <C>      <C>    <C>      <C>     <C>        <C>       <C>        <C> 
- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------

                                                                                                               ---------------------
                                                                                           FUEL ON BOARD
                                                                                                               ---------------------
SIGNATURE _______________________________________________________                        HYDRAULIC FLUID
                                                                                                               ---------------------
                                                                                                GREASING
                                                                                                               ---------------------
</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 
<S>            <C>                 
- -------------------------------------------------------------------------------------------------------------------------
REPORT OF OPERATIONS-PIPELINE, DIPPER OR BUCKET DREDGES                                      REPORTS CONTROL SYMBOL  
                                                                                                    ENGCW-0-13        
- -------------------------------------------------------------------------------------------------------------------------
THEN:                           TO:                                FROM:                                  REPORT NO:  

- -------------------------------------------------------------------------------------------------------------------------
CHARACTER   [_] ????^     [_]NEW        [_]???      [_]STATUS     [_] COMPLETION   [_]???      DATE OR PERIOD  
OF REPORT       ????^        WORK
- -------------------------------------------------------------------------------------------------------------------------
         NAME AND TYPE                                           SIZE      PIPELINE          DREDGE OR BUCKET
                                                                                ^????         
DREDGE  HORSEPOWER OF      DREDGE PUMP                 SUCTION PIPE??        CUTTER OR BUCKET             ^?????    
        ----------------------------------------------------------------------------------------------------------------
          NUMBER OF        DREDGE        ????         ????         TOTAL      WORK        ??? PER DAY    DAYS PER WEEK
        CREW MEMBERS                                  ????                   SCHEDULE   
- ------------------------------------------------------------------------------------------------------------------------
          NAME                                                    AUTO      WIDTH         DEPTH          OVERDEPTH    
PROJECT                                                        DIMENSIONS                                                   
        ----------------------------------------------------------------------------------------------------------------
AND BAR   LOCATION (include ???? ????)
- ------------------------------------------------------------------------------------------------------------------------
            ABSOLUTE DENSITY               IN PLACE DENSITY         ^???? ???? 
CHARACTER                     ???? ???                      ^??????  
          --------------------------------------------------------------------------------------------------------------
   OF     ???? SIZE                                                          GEOLOGICAL CLASSIFICATION
MATERIAL   13-          MM ??                 MM 13..        MM
- ------------------------------------------------------------------------------------------------------------------------ 
  CONTRACT   NUMBER                                      [_]CONTRACTOR         [_]??? LABOR   TOTAL NO.OF                
OR DREDGING                                                                                   DAYS ON ???   
   ORDER                                                                                      WORK WAS DONE  
- ------------------------------------------------------------------------------------------------------------------------    
 CHANNEL     AVERAGE   BEFORE DREDGING  AFTER DREDGING   MINIMUM          BEFORE DREDGING     AFTER DREDGING  
CONDITION     DEPTH                                      SOUNDING    
- ------------------------------------------------------------------------------------------------------------------------    
  RIVER      MINIMUM             TIME           MAXIMUM         TIME            GRADE LOCATION 
  STAGE 
- ------------------------------------------------------------------------------------------------------------------------     
 WEATHER     ^?? ???? ???                                           velocity    wind (maximum velocity direction)
CONDITION                                                                ???^
- ------------------------------------------------------------------------------------------------------------------------         
      WORK PERFORMED                    DISTRIBUTION OF TIME
- ------------------------------------------------------------------------------------------------------------------------ 
         ITEM                         UNIT     QUANTITY          EFFECTIVE WORKING TIME                HOURS      MIN 
                                                                     (chargeable to rest of work)
- ------------------------------------------------------------------------------------------------------------------------      
AVERAGE WIDTH OF CUT                  FEET                       PUMPING OR DREDGING
- ------------------------------------------------------------------------------------------------------------------------          
TOTAL ADVANCE THIS PERIOD             FEET                       PCT, OF EFFECTIVE RENTAL TIME     %
- ------------------------------------------------------------------------------------------------------------------------          
TOTAL ADV, PREVIOUS TO THIS PERIOD    FEET                       BOOSTER (in hours)         hrs mins.        
- ------------------------------------------------------------------------------------------------------------------------           
TOTAL ADVANCE TO DATE                 FEET                       NON-EFFECTIVE WORKING TIME
- --------------------------------------------------------------
FLOATING PIPE:   SHORE PIPE           FEET                       (chargeable to rest of work)
- ------------------------------------------------------------------------------------------------------------------------ 
TOTAL LENGTH OF DISCHARGE PIPE        FEET                       HANDLING PIPE LINES
- ------------------------------------------------------------------------------------------------------------------------  
AVERAGE LIFT                          FEET                       HANDLING ANCHOR LINES
- ------------------------------------------------------------------------------------------------------------------------   
AVERAGE PUMP SPEED                    R.P.M.                     CLEARING PUMP AND PIPE LINE
- ------------------------------------------------------------------------------------------------------------------------   
AVG, DREDGED PER PUMP, MR, GROSS      CU.YDS.                    CLEARING CUTTER OR SUCTION HEAD         
- ------------------------------------------------------------------------------------------------------------------------    
SCOWS LOADED                          NUMBER                     WAITING FOR SCOWS
- ------------------------------------------------------------------------------------------------------------------------    
AVERAGE LOAD PER SCOW                 CU.YDS.                    TO AND FROM WHARF OR ANCHORAGE
- ------------------------------------------------------------------------------------------------------------------------   
              CUBIC YARDS REMOVED                                CHANGING LOCATION OF PLANT ON JOB
- ------------------------------------------------------------------------------------------------------------------------   
AMOUNT DREDGED THIS PERIOD:                                      LOSS DUE TO OPPOSING NATURAL ELEMENTS
                                                                 -------------------------------------------------------           
  (1) GROSS (computed amount)                                    LOSS DUE TO PASSING VESSELS
- ------------------------------------------------------------------------------------------------------------------------  
  (2) CREDITED (pay ^???)                                        SHORE LINE AND SHORE WORK
- ------------------------------------------------------------------------------------------------------------------------           
AMOUNT PREVIOUSLY REPORTED:                                      WAITING FOR BOOSTER
                                                                 -------------------------------------------------------           
  (1) GROSS (^???? ????)                                         MINOR OPER. REPAIRS (explain in remarks)
- ------------------------------------------------------------------------------------------------------------------------           
  (2) CREDITED (pay ???)                                         WAITING FOR ATTENDANT PLANT
- -------------------------------------------------------------------------------------------------------------------------           
TOTAL AMOUNT DREDGED TO DATE:                                    PREPARATION AND MAKING UP TOW
                                                                 --------------------------------------------------------           
  (1) GROSS (??? ????)                                           TRANSFERRING PLANT BETWEEN WORKS
- -------------------------------------------------------------------------------------------------------------------------           
  (2) CREDITED (??? ????)                                        LAY TIME OFF SHIFT AND SATURDAYS
- -------------------------------------------------------------------------------------------------------------------------           
                ATTENDANT PLANT                                  SUNDAYS AND HOLIDAYS
- -------------------------------------------------------------------------------------------------------------------------           
ITEM                 NAME OR NUMBER          HOURS               FIRE DRILL
- -------------------------------------------------------------------------------------------------------------------------           
                                                                 MISCELLANEOUS (explain in remarks)
- -------------------------------------------------------------------------------------------------------------------------           
                                                                 TOTAL NON-EFFECTIVE WORKING TIME
- -------------------------------------------------------------------------------------------------------------------------           
                                                                 PCT OF NON-EFFECTIVE RENTAL TIME
- -------------------------------------------------------------------------------------------------------------------------           
                                                                 TOTAL EFFECTIVE AND NON-EFFECTIVE  %
- ----------------------------------------------------------------
                                                                            TIME
                                                                      (chargeable to rest of work) 
- -------------------------------------------------------------------------------------------------------------------------           
                                                                 PCT. OF TOTAL TIME IN PERIOD        %  
- -------------------------------------------------------------------------------------------------------------------------           
                                                                               LOST TIME             
                                                                     (not chargeable to rest of worK)

                                                                 MAJOR REPAIRS AND ALTERATIONS
- -------------------------------------------------------------------------------------------------------------------------           
                                                                 CESSATION                          
- -------------------------------------------------------------------------------------------------------------------------           
                                                                 COLLISIONS
- -------------------------------------------------------------------------------------------------------------------------           
                                                                 MISCELLANEOUS (explain in remarks)
- -------------------------------------------------------------------------------------------------------------------------           
 NUMBERS OF   BY DISTRICT PERSONNEL    BY ??? & ??? PERSONNEL    TOTAL LOST TIME 
                                                                 --------------------------------------------------------           
INSPECTIONS                                                      PERCENTAGE OF TOTAL TIME            %
- -------------------------------------------------------------------------------------------------------------------------           
CONTRACT    ^??????? ?????? ?????? ???????? ?????????? ?????      
USE ONLY    CHANGE ORDER OR ????        [_] NO     [_]YES        TOTAL TIME IN PERIOD   
                                                                 -------------------------------------------------------- 
            (If "YES", explain under reports or ^???)
</TABLE> 
                                                                 

<PAGE>
 
<TABLE> 
<CAPTION> 
===================================================================================================================================

                                                       SUMMARY OF COSTS
- -----------------------------------------------------------------------------------------------------------------------------------
                                                        ITEMS                                                          COST
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                                                <C> 
 DIRECT PLANT OPERATING COSTS

   UNIFORM DAILY RATE BASIS (To be completed when submitting ^????? and Completion reports.)

      CHARGES:_________ DAYS AT $_________ PER DAY (Item 19, ENG Form 22 (costs)-
        adjusted to exclude plans increment cost.)

                                                     OR

   ACTUAL PLANT COSTS (To be completed when submitting Annual report.)
      PAYROLLS (gross)............................................................................ $____________
      SUBSISTENCE & QUARTERS OF PER DIEM & MILEAGE................................................ $____________ 
      FUEL ___________ BARRELS AT $____________ PER BARREL........................................ $____________ 
      WATER....................................................................................... $____________ 
      LUBRICANTS.................................................................................. $____________ 
      PLANT OWNERSHIP COSTS (or computed below)................................................... $____________ 
      INSURANCE................................................................................... $____________ 
      ATTENDANT PLANT............................................................................. $____________ 
      MISCELLANEOUS............................................................................... $____________  

   SUBTOTAL--UNIFORM DAILY RATE OR ACTUAL COSTS..................................................................  $_____________
   SUBTOTAL--PLANT UNIT COST $                  PER CUBIC YARD.
===================================================================================================================================

 SHORE WORK

   SUBTOTAL--SHORE WORK COSTS....................................................................................  $_____________
   SUBTOTAL--SHORE WORK UNIT COSTS $                   PER CUBIC YARD.
===================================================================================================================================
 OTHER COSTS
  
   SURVEYS........................................................................................ $____________  
   INSPECTION AND SUPERVISION..................................................................... $____________  
   OVERHEAD....................................................................................... $____________  
   OTHER INDIRECT COSTS........................................................................... $____________  

   SUBTOTAL--OTHER COSTS.........................................................................................  $_____________ 
   SUBTOTAL--OTHER UNIT COST $                    PER CUBIC YARD.
===================================================================================================================================
   
   GRAND TOTAL--ALL COSTS........................................................................................  $_____________
   GRAND TOTAL--ALL UNIT COSTS $                  PER CUBIC YARD.
===================================================================================================================================
                    OPERATING SUPPLIES                                                  ANNUAL REPORT DATA
- ------------------------------------  --------------------
 COMMODITIES          CONSUMED              INVENTORY                        (complete when submitting Annual Report)
               ---------------------  --------------------   ----------------------------------------------------------------------
                 UNIT     QUANTITY     QUANTITY     VALUE     COST PER RENTAL MINUTE                                      Per min. 
- -------------- -------- ------------ ------------ --------                   (Based on total operating cost)...... $_____________ 
 FUEL (oil)      BRLS                                         TOTAL COST OF PLANT                          
- -------------- -------- ------------ ------------ --------                   (End of F.Y. reporting period)....... $_____________ 
 LUBRICANT                                                    BOOK VALUE                                   
   (oil)         GAL                                                         (End of F.Y. reporting period)....... $_____________ 
- -------------- -------- ------------ ------------ --------    BALANCE IN PLANT ACCOUNT                     
 LUBRICANT                                                                   (End of F.Y. reporting period)....... $_____________ 
  (grease)       LBS                                         ===================================================== ================
- -------------- -------- ------------ ------------ --------    PLANT OWNERSHIP COSTS                        
 WATER           GAL                                                         (Actual for F.Y. reporting period):          
- -------------- -------- ------------ ------------ --------                                                          
                                                                   DEPRECIATION................................... $_____________ 
- -------------- -------- ------------ ------------ --------         REPAIRS (Adjusted)............................. $_____________ 
                                                                   CESSATION OF WORK.............................. $_____________ 
- -------------- -------- ------------ ------------ --------         SMALL TOOLS, ETC............................... $_____________ 
 SUBSISTENCE SUPPLIES............................
- ------------------------------------------------- --------
 MISCELLANEOUS SUPPLIES..........................
- ------------------------------------------------- --------                                                         --------------
 TOTAL........................................... $           TOTAL............................................... $
================================================= ========   ======================================================================
 REMARKS




- -----------------------------------------------------------------------------------------------------------------------------------
 SUBMITTED BY (Name, title, and signature)   RECOMMENDED BY (Name, title, and signature)  APPROVED BY (Name, title, and signature)




=================================================================================================================================== 
</TABLE> 


<PAGE>
 
                               DAILY WORK REPORT

Job Location__________________________ Dredge________________ Date______________

Operation_____________________ Shift ____________________ Wether_______________

Type Material - Sand _______ Mud _______ Clay_______ Silt _________ Other_______

     ____________________     __________________     ____________________


- --------------------------------------------------------------------------------
STOP     START             LOST TIME EXPLAIN                    HRS.        MIN.
- --------------------------------------------------------------------------------

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________


                                       OPERATORS SIGNATURE______________________

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                           SECTION TABLE OF CONTENTS

                      DIVISION 01 - GENERAL REQUIREMENTS

                                 SECTION 01500

                CONSTRUCTION FACILITIES AND TEMPORARY CONTROLS

PART 1    GENERAL

  1.1  REFERENCES
  1.3  AVAILABILITY OF UTILITIES
    1.2.1  Temporary Connections
    1.2.2  Temporary Equipment and Lines
  1.3  TELEPHONE SERVICE
  1.4  SANITATION

PART 2    PRODUCTS

  2.1  SAFETY SIGN
  2.2  CONSTRUCTION SIGN
  2.3  GOVERNMENT FIELD OFFICE

PART 3    EXECUTION

  3.1  CLEANING DURING CONSTRUCTION
    3.1.1  Daily Cleaning
    3.1.2  On-Site Container
    3.1.3  Removal of Waste
    3.1.4  Burning
  3.2  SAFETY SIGN
  3.3  CONSTRUCTION SIGN
  3.4  GOVERNMENT FIELD OFFICE (TRAILER)
  3.5  SECURITY AT THE SITE
  3.6  REMOVAL OF TEMPORARY MATERIALS AND EQUIPMENT

- -- End of Section Table of Contents --

                    SECTION TABLE OF CONTENTS 01500 PAGE 1

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

                                 SECTION 01500

                CONSTRUCTION FACILITIES AND TEMPORARY CONTROLS

PART 1 GENERAL

1.1     REFERENCES

  The publications listed below form a part of this specification to the extent
  referenced. The publications are referred to in the text by basic designation
  only.

                  NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

  NFPA 70                                 (1996) National Electrical Code

1.2     AVAILABILITY OF UTILITIES

  The Contractor shall provide all temporary facilities and controls required
  for the execution of the work, including arranging for water, heat, and
  electricity for Contractor and Government trailers. Each utility at Massport's
  properties shall be metered and paid for by the Contractor at prevailing rates
  charged by Massport.

1.2.1   Temporary Connections

  The Contractor, at his own expense and in a workmanlike manner satisfactory to
  the Contracting Officer, shall install and maintain all necessary temporary
  connections, distribution lines and all meters required to measure the amount
  of each utility used; and he shall remove them prior to final acceptance of
  the construction.

1.2.2   Temporary Equipment and Lines

  All required temporary electrical equipment and lines shall be furnished,
  installed, connected, and maintained by the Contractor according to the COE EM
  385-1-1, Section 11.D and shall be removed prior to final acceptance of the
  work. Temporary wiring shall conform to Article 305 of NFPA 70. Materials and
  equipment need not be new, but must be in good repair and serviceable
  condition. Prior to being energized, the systems and devices will be checked
  and approved for polarity, continuity of ground, and resistance to ground.
  Periodic inspections of systems and devices will be made by the Contractor at
  intervals not to exceed one (1) week.

1.3     TELEPHONE SERVICE

  Provide and maintain separate lines for facsimile machine and two standard
  telephone service lines to the Government Field Office. Telephone service
  shall be accessible during all work hours.

1.4     SANITATION

  Adequate sanitary conveniences of a type approved for the use of persons
  employed on the work shall be provided, properly secluded from public
  observation, and maintain by the Contractor in such a manner as required or
  approved by the Contracting Officer. These conveniences shall be maintained at
  all times without nuisance. Upon completion of the work, the convenience shall
  be removed by the Contractor from the premises, leaving the premises, clean
  and free from nuisance.

PART 2    PRODUCTS

2.1     SAFETY SIGN 

                             SECTION 01500 Page 1
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


  Sign shall be 3 feet by 6 feet and shall conform to the requirements of 
  Drawing No. STD-36 attached at the end of this section.

2.2    CONSTRUCTION SIGN

  Sign shall conform to the requirements of the Standard Construction Sign 
  Detail attached at the end of this section.

2.3    GOVERNMENT FIELD OFFICE

  Field office shall be a trailer approximately 12' x 60'. The trailer shall
  include, as a minimum, two overhead shelves, two double desks with pedestals,
  a 36" x 72" plan table, a plan rack, a moveable office desk, chairs for all
  desks, 4 folding chairs, an enclosed toilet, a water cooler, two telephones,
  a new facsimile machine, a plain paper photocopy machine, and one partition.
  Doors shall be provided with cylinder locks and six keys.

PART 3    EXECUTION

3.1    CLEANING DURING CONSTRUCTION

3.1.1     Daily Cleaning

  Execute daily cleaning to keep the work, the site and adjacent properties
  free from accumulation of waste materials, rubbish and windblown debris,
  resulting from construction operations.

3.1.2     On-Site Container

  Provide on-site containers for the collection of waste materials, debris and 
  rubbish.

3.1.3     Removal of Waste

  Remove waste materials, debris and rubbish from the site periodically and
  dispose of off Government property in accordance with applicable laws and
  regulations.

3.1.4     Burning

  No burning of brush or debris will be permitted at the site.

3.2    SAFETY SIGN

  The Contractor shall construct a safety sign at a location directed by the
  Contracting Officer. The sign shall be erected as soon as possible and within
  15 calendar days after date of receipt of Notice to Proceed. The data required
  by the sign shall be inserted. No separate payment will be made for erecting
  and maintaining the safety sign and all costs in connection therewith will be
  considered a subsidiary obligation of the Contractor. The sign will remain the
  property of the Contractor. Previously used signs may be reused when
  satisfactorily reconditioned.

3.3    CONSTRUCTION SIGN

  The Contractor shall furnish, erect, and maintain a construction sign. The
  information needed to complete the wording on the sign will be furnished by
  the Contracting Officer and will be essentially as shown on the cover of the
  specifications. The sign shall be erected not later than 15 calendar days
  after receipt of Notice to Proceed at a location selected by the Contracting
  Officer. Upon completion of the work, the sign will remain the property of the
  Contractor. No separate payment will be made for furnishing, erecting and
  maintaining the construction sign.

                            SECTION 01500  Page 2
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

3.4  GOVERNMENT FIELD OFFICE (TRAILER)

  The Contractor shall provide a trailer for the Government field office.  The
  contractor shall provide all services and supplies in connection with
  maintaining the trailer including cleaning, janitorial services, heating,
  lighting, water supply, and sanitary services. The trailer will be located by
  the Contractor where directed. No separate payment will be made for the
  trailer and all costs shall be included in the items comprising the bid
  schedule. The trailer, after completion of the work, will become the property
  of the contractor and be removed from the site. The trailer shall be secured
  against overturning by an approved anchorage system consisting of a minimum of
  four soil anchors firmly set in solid ground.

3.5  SECURITY AT THE SITE

  The Contractor shall be responsible for site security during the course 
  of the work.

3.6  REMOVAL OF TEMPORARY MATERIALS AND EQUIPMENT

  Remove temporary materials, equipment, services, and construction prior to
  completion of work.  Clean and repair damages caused by installation or use of
  temporary facilities.  Return site to pre-construction condition.

  -- END OF SECTION --


                             SECTION 01500  Page 3
<PAGE>
 
CORPS OF ENGINEERS                                                    U.S. ARMY

                                                            [GRAPH APPEARS HERE]

                              (CONTRACTOR'S NAME)                

                                   (ADDRESS)


                          SAFETY IS A JOB REQUIREMENT            ELEVATION
                                                                 ---------
                       THIS CONTRACT HAS OPERATED SINCE

(APPROPRIATE DATE)        WITHOUT A LOST TIME INJURY       [GRAPH APPEARS HERE]

                            PREVIOUS RECORD    DAYS        
                                                             SECTION C-C  
                                                             -----------   
                                                         
                                   ELEVATION             3" x 6" SIGN
                                   ---------             ------------   
                                   SEALE ????^
                                                   (4" x  8" SIGN SIMILAR)
                                                   -----------------------

                                        NOTE:
                                        ----
                                           I And ^?????? is at 3" x 6" sign
                                           ??? ????????? for ?????? required  
                                           ??????  ???? contract.
SPECIFICATIONS
- --------------
     1. Posts, ????? and ????? shall be No. 1 yellow ???
or approved ???, SOS, Fed.???? MM-R-??
     2. All expand surfaces, including edges, shall be
?????? and cost of ???? and ???? ?????? to ???? ????            [LOGO APPEARS 
  TTP-P5c, as amended. ???? ???? of sign, shall be given         HERE]
??? ???? costs of green point confirming to Fed.               
Spec ?T-P Bid, ???? 24260. All other inforces shall conforming
to ??? ???? ?????
     3. ???? following point shall be ???? Buffalo Colour C20 
WI as performed by Sherwin - Williams Co., or approved ????.
     4. Plywood shall conform to Product Standard PS 1-55, A-c, 
EXT-DFPA.
     

                                              DEPARTMENT OF THE  ????
                                        
                                                  ????? ????? ????

                                                ???? ????? ???? ????

                                                    STANDARD CONSTRUCTION DETAIL
                                        
                                                            SAFETY SIGN

                                                       ELEVATIONS AND SECTION
                         
                                                       ?????      DATE JUNE 1967

                                                       S T D - 36

                                                               NED STANDARD DWG.
<PAGE>
 
                                     8'-0"
- -------------------------------------------------------------------------
                       (RED LETTERS ON WHITE BACKGROUND)
                                                                  RED
- -------------------------------------------------------------------------
                                                  [LOGO]
                                               US ARMY, CORPS
                                               OF ENGINEERS.
                                               NEW ENGLAND DIVISION

                           PROJECT TITLE                                   

                        PROJECT NAME CONT'D
                                                                           4'-0"
        CONSTRUCTION BY:                  CONSTRUCTION MANAGER:
        CONTRACTOR NAME                   NEW ENGLAND DIVISION.
             AND                           CORPS OF ENGINEERS
            ADDRESS
        ADDRESS CONT'D

                           PLANNED COMPLETION DATE:
- -------------------------------------------------------------------------

                          METAL OVER 3/4" CDX PLYWOOD




- --------------------------------------------------------------------------------
                                                                               1
DEPARTMENT OF THE ARMY
 NEW ENGLAND DIVISION                                   STANDARD
  CORPS OF ENGINEERS                               CONSTRUCTION SIGN
      WALTHAM, MA                                        DETAIL                1
- --------------------------------------------------------------------------------
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                           SECTION TABLE OF CONTENTS

                      DIVISION 01 - GENERAL REQUIREMENTS

                                 SECTION 01600

                              PLANT AND EQUIPMENT

PART 1 GENERAL

  1.1  SUBMITTALS 
  1.2  PLANT AND EQUIPMENT
    1.2.1  Sufficient Capacity
    1.2.2  Minimum Capacity
    1.2.3  Reduction in Capacity
    1.2.4  Inspections and Certifications
  1.3  LICENSE REQUIREMENTS
  1.4  PERMIT REQUIREMENTS
  1.5  HEIGHT LIMITATIONS

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION (Not Used)

- -- End of Section Table of Contents --

                    SECTION TABLE OF CONTENTS 01600 PAGE 1

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

                                 SECTION 01600

                              PLANT AND EQUIPMENT

PART 1    GENERAL

1.1    SUBMITTALS

  Government approval is required for submittals with a "GA" designation;
  submittals having an "FIO" designation are for information only. The following
  shall be submitted in accordance with Section 01300 SUBMITTAL PROCEDURES;

       SD-07 Schedules

  Plant and Equipment; FIO, E reviewer.

  Submit a schedule of the plant and equipment the Contractor intends to employ
  in the performance of the work of this contract. Submit also copies of all
  applicable inspections and certifications for all floating plant and
  equipment.

1.2    PLANT AND EQUIPMENT

1.2.1     Sufficient Capacity

  The Contractor shall keep on the job sufficient plant and equipment to meet
  the requirements of the work. The plant and equipment shall be in satisfactory
  operating condition and be capable of safely and efficiently performing the
  work. The plant and equipment shall be subject to inspection by the
  Contracting Officer at all times.

1.2.2     Minimum Capacity

  The plant and equipment listed on the Plant and Equipment Schedule submitted
  with the Contractor's bid is the minimum which the Contractor shall place and
  keep on the job unless otherwise determined by the Contracting Officer. The
  listing of plant and equipment is not to be construed as an agreement on the
  part of the Government that the equipment is adequate to perform the required
  work.

1.2.3     Reduction in Capacity

  No reduction in the capacity of the plant and equipment employed on the work
  shall be made except by written permission of the Contracting Officer. The
  measure of the capacity of the plant and equipment shall be its actual
  performance on the work covered by this contract.

1.2.4     Inspections and Certifications

  Prior to commencement of work at the site, the Contractor shall submit to the
  Contracting Officer for review, copies of all applicable inspections and
  certifications of floating plant and equipment as required by Federal, State
  and local laws and regulations. See also SAFETY AND HEALTH REQUIREMENTS MANUAL
  EM 385-1-1, Sections 16 and 19. Such inspections and certifications shall be
  current and maintained in force for the duration of this contract. Each item
  of floating plant and equipment shall have on board a waste oil management
  plan which details the intended disposal method for waste oil. All equipment
  used in the prosecution of the work that uses fuel, oil or hydraulic fluid
  shall be inspected daily for leakage.

1.3    LICENSE REQUIREMENTS

                            SECTION 01600   Page 1
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

     Each vessel exceeding twenty-six feet in length, excluding sheer, which is
     used for pushing, hauling alongside, or any other method of towing, and not
     required by law to have a valid Certificate of Inspection by the U.S. Coast
     Guard, shall be under the actual direction and control of a person licensed
     for towing in the geographic area of the work by the U.S. Coast Guard.
     Licensed persons shall not perform command or other duties in excess of
     twelve hours in any consecutive twenty-four hour period except in an
     emergency.


   1.4  PERMIT REQUIREMENTS

     The Contractor's plant and equipment employed on the work shall meet the
     requirements of all applicable permit and certifications issued for the
     project as specified in these specifications.

   1.5  HEIGHT LIMITATIONS

     Height limitations for equipment shall conform to the FAA requirements for
     the various areas of the project. The Contractor is responsible for
     coordinating these height limitations prior to commencing with the work.

   PART 2 PRODUCTS (Not Used)

   PART 3 EXECUTION (Not Used)

          -- End of Section --

                             SECTION 01600 Page 2
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                           SECTION TABLE OF CONTENTS

                      DIVISION 01 - GENERAL REQUIREMENTS

                                 SECTION 01900

                          GENERAL SAFETY REQUIREMENTS

PART 1    GENERAL

   1.1    Copies of Safety and Health Requirements Manual
   1.2    SUBMITTALS
     1.2.1     Statements 
     1.2.2     Accident Prevention Plan Submittal
   1.3    UNFORESEEN HAZARDOUS MATERIAL

PART 2    PRODUCTS  (Not Applicable)

PART 3    EXECUTION

   3.1    WEEKLY SAFETY MEETINGS
   3.2    UNDERWATER DIVING OPERATIONS

- -- End of Section Table of Contents --

                    SECTION TABLE OF CONTENTS 01900 PAGE 1

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


                                 SECTION 01900

                          GENERAL SAFETY REQUIREMENTS

PART 1    GENERAL

1.1  Copies of Safety and Health Requirements Manual

  One copy of COE EM 385-1-1 will be provided to the Contractor. Additional
  copies may be ordered at a cost of $31.00 each (Check or Money Order only)
  from the following address:

     U.S. Government Printing Office (GPO)
     Superintendent of Documents
     PO Box 371954
     Pittsburgh, PA 15250-7954

     (GPO Stock Number for the manual is 0008-022-00-310-0)

  The manual may be purchased by calling 202-512-1800 and using a credit card
  (Mastercard or Visa only). COE EM 385-1-1 may be viewed at the COE Technical
  Library, at 424 Trapelo Road, Waltham, MA 02254-9149, Building 116N. The
  Manual may also be viewed or downloaded free of charge via the Internet USACE
  Homepage (http:/www.usace.army.mil). Follow the organizational link to the
  Safety and Occupational Health Office.

1.2  SUBMITTALS

  Submit the following for acceptance by the Contracting Officer. Follow the
  administrative procedures for making submittals as specified in Section 01300
  SUBMITTAL PROCEDURES.

1.2.1   Statements

     a.   Site Specific Accident Prevention Plan.

     b.   Phased Job Activity Hazard Analysis.

     c.   Machinery Inspection Certification:

   Submit certification that machinery floating plant and other mechanized
   equipment is in safe operating condition (see COE EM 385-1-1, paragraph 
   16.A.01 and 19.A.01).

     d.   Modification to Equipment:

   Submit manufacturer's written approval of modifications or additions to
   hoisting equipment. Government acceptance of submittal must be attained
   before such equipment can be brought on the job-site.

     e.   Safety Meeting Report:

   Submit safety meeting reports detailing the subjects discussed at safety 
   meetings within three days after each meeting.

1.2.2   Accident Prevention Plan Submittal

   Submit a plan outlining Contractor proposals for accident prevention in
   accordance with Contract Clause "ACCIDENT PREVENTION." Reference COE EM 
   385-1-1, 01.A.07 (page 2) and Appendix "A" (pages A-1 through A-5) for the
   guidelines for preparation of Accident Prevention Plans.

                             SECTION 01900 Page 1



<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

     a.   List all major definable features of work to be completed under this 
     contract.

     b.   Accident Reporting

          1)   All accidents shall be investigated.
     
          2)   The Plan must state that all lost-time injuries and property
          damage accidents (excluding on-the-road vehicle accidents) in which
          the property damage exceeds $2,000.00 shall be reported to the Area
          Engineer within 48 hours of the accident.

          3)   In the event of an accident or occupational illness which results
          in a lost work day or $2,000.00 or more in property damage, an ENG
          Form 3394 shall be completed, signed by the Contractor, and submitted
          to the NAE Safety Office within five working days.

     c.   Submit an "Activity Hazard Analysis" for each definable feature of the
     work identified in "a" above. Submit each "Activity Hazard Analysis" a
     minimum of 15 days prior to the start of that phase of work. Submit
     Activity Hazard Analysis Worksheets in accordance with COE EM 385-1-1,
     paragraphs 01.A.09 and 01.A.10 and FIGURE 1-1. A major phase of work is
     defined as an operation involving a type of work presenting hazards not
     experienced in previous operations or where a new subcontractor or work
     crew is to perform. The analysis shall define all activities to be
     performed and identify the sequence of work, the specific hazards
     anticipated, and the control measures to be implemented to eliminate or
     reduce each hazard to an acceptable level. Work shall not proceed on that
     phase until the activity hazard analysis has been accepted by the
     Contracting Officer and a preparatory meeting has been conducted by the
     Contractor to discuss its contents with all engaged in the activities,
     including the Contractor, subcontractor(s), and Government on-site
     representatives. The activity hazard analyses shall be continuously
     reviewed with the quality control definable features of work and when
     appropriate modified to address changing site conditions or operations.

     d.   Severe Weather Plan: The Contractor shall submit a Severe Weather Plan
     describing the actions to be taken to protect persons and property in the
     event of severe weather warnings or extreme sea conditions. Submit the plan
     as an attachment to the Accident Prevention Plan, for review and
     acceptance. This plan shall include but not be limited to the following:

          1.   The types of storms anticipated (Winter storm, Hurricane, 
          Tornado).

          2.   The time intervals before storms when action will be taken and 
          the details of the actions to be taken

          3.   List of the equipment to be used on the project and its ability 
          to handle adverse weather.

          4.   Distance from the work area to a safe place in the harbor and the
          time required to move the equipment.

          5.   Method of securing equipment.

          6.   List of equipment to be utilized to make the move to a safe place
          in the harbor (tug boats, work boats, etc.), to include the name and
          horsepower of the equipment.

          7.   Methods of securing equipment not moved.

                             SECTION 01900 Page 2
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

               8.   Plan of evacuation to include immediate reaction plans to be
               taken for all storm occurrences, particularly sudden storms.

               9.   A statement that full time monitoring of the NOAA marine 
               weather broadcasts and other local commercial weather forecasting
               services will be the Contractor's primary source of information
               in the decision process to implement action under the severe
               weather plan.

1.3  UNFORESEEN HAZARDOUS MATERIAL

  If hazardous materials are encountered during construction operations that may
  be dangerous to human health upon disturbance, stop that portion of work and
  notify the Contracting Officer immediately. Within 14 calendar days the
  Government will determine if the material is hazardous. If the material is not
  hazardous or poses no danger, the Government will direct the Contractor to
  proceed without change. If the material is hazardous and handling of the
  material is necessary to accomplish the work, the Government will issue a
  modification pursuant to "FAR 52.243-4, Changes" and "FAR 52.236-2, Differing
  Site Conditions."

PART 2 PRODUCTS (Not Applicable)

PART 3 EXECUTION

3.1  WEEKLY SAFETY MEETINGS

  In accordance with COE EM 385-1-1, Section 1, paragraph 01.B.03, at least once
  a month Contractor shall conduct a safety meeting for all supervisors and
  foremen. Additionally, at least one safety meeting per week shall be conducted
  by the foremen for all workers. After each safety meeting, a safety meeting
  report shall be completed. A copy of a suggested weekly safety meeting form is
  attached at the end of this section.

3.2  UNDERWATER DIVING OPERATIONS

  In the event that underwater diving operations become necessary due to the
  work of this contract, such operations shall be conducted in accordance with
  Section 02492 UNDERWATER DIVING WORK.

    -- End of Section --

                             SECTION 01900 Page 3
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


                             WEEKLY SAFETY MEETING

CENAE                                              Date Held _____________
                                                   Time __________________

SUBJECT: CONTACT NO. DACW33-97-C-00 __ - WEEKLY SAFETY MEETING

CONTRACTOR ___________________________     PERSONNEL PRESENT
                                         --------------------
Date and Time Held: __________________     Contr. Sub. Govt.
                                         ....................
Conducted By: ________________________   
                                         -------- ---- ------

All persons attending the meeting must sign the bottom or back of this form.

Subjects discussed (Note, delete, or add):
COE EM 385-1-1, Section: __________

Accident Prevention Plan ______   Individual Protective Equipment        _______

Prevention of Falls      ______   Back Injury/Safe Lifting Techniques    _______

Fire Prevention          ______   Sanitation, First Aid, Waste Disposal  _______

Tripping Hazards         ______   Clean-up - trash, nails in lumber      _______

Staging, Ladders, Concrete Forms, Safety Nets      ______

Hand Tools, Power Tools, Machinery, Chain Saws     ______

Equipment Inspection & Maintenance (Zero Defects)  ______

Hoisting Equipment, Winch and Crane Safety         ______

Ropes, Hooks, Chains and Slings                    ______

Vehicles Operation Safety                          ______

Electrical Grounding, Temporary Wiring, GFCI       ______

Lockouts/Safe clearance procedures
(electrical, pressure, moving parts)               ______

Welding, Cutting         ______    Excavation Hazard/Rescue  ______

Loose Rock/Steep Slopes  ______    Explosives                ______

Water Safety             ______    Boat Safety               ______

HAZMAT, Toxic hazards, MSDS, respiratory, ventilation        ______

Other Items of concern specific to this contract:


CQC Rep. Signature ________________  CR Inspector ____________________


                             SECTION 01900 Page 4
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                           SECTION TABLE OF CONTENTS

                            DIVISION 02 - SITE WORK

                                 SECTION 02482

                                   DREDGING

PART 1   GENERAL

     1.1   DEFINITIONS
       1.1.1   Soft Material
       1.1.2   Hard Material
     1.2   RELATED WORK SPECIFIED ELSEWHERE
     1.3   SUBMITTALS
     1.4   EXISTING CONDITIONS
       1.4.1   Material to be Dredged
       1.4.2   Results of Explorations
       1.4.3   Existing Reports and Historical Data
       1.4.4   Artificial Obstructions
       1.4.5   Existing Utilities
         1.4.5.1    Private Utilities and Public Agencies
         1.4.5.2    Protection of Utility Lines
         1.4.5.3    Removal of Utility Lines
     1.5   OVERDEPTH AND SIDE SLOPES
       1.5.1   Allowable and Required Overdepth
       1.5.2   Side Slopes
         1.5.2.1    Side Slopes at Disposal Cells
         1.5.2.2    Side Slopes at Berths
       1.5.3   Excessive Dredging
       1.5.4   Protection of Existing Structures
     1.6   INSPECTION OF DISPOSAL
       1.6.1   Communication
       1.6.2   Transportation

PART 2   PRODUCTS

     2.1   CLEAN GRANULAR MATERIAL FOR CAPPING DISPOSAL CELLS

PART 3   EXECUTION

     3.1   CONDUCT OF DREDGING WORK
       3.1.1   Order of Work
       3.1.2   Disposal of Excavated Material
       3.1.3   Interference with Navigation
       3.1.4   Ranges, Gages, and Lines
       3.1.5   Method of Communication
       3.1.6   Debris Management
         3.1.6.1    Clearing of Main Ship Channel Debris
       3.1.7   Underwater Diving Operations
     3.2   DREDGING BOSTON HARBOR
       3.2.1   Dredging of Soft Material
       3.2.2   Dredging of Hard Material
       3.2.3   Dredging of Berth Areas
       3.2.4   Underwater Utilities
       3.2.5   Removal of Abandoned Water Tunnel
     3.3   CONSTRUCTION OF IN-CHANNEL DISPOSAL CELLS
       3.3.1   Work Restrictions for the Protection of Fisheries
       3.3.2   Location and Number of Cells
       3.3.3   Verification of Electronic Positioning System
       3.3.4   Cell Filling at High Tide
       3.3.5   Cell Construction Surveys by the Government

                    SECTION TABLE OF CONTENTS 02482 PAGE 1
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

     3.3.6     Cell Construction Surveys by the Contractor
       3.3.6.1      Documentation
     3.3.7     Passage of Vessels
     3.3.8     Initial In-channel Disposal Cell
     3.3.9     Dredging of Hard Material in Cells
     3.3.10    Placement of soft Material in Cells
     3.3.11    Documentation
     3.3.12    Capping of In-Channel Disposal Cells
       3.3.12.1     General
       3.3.12.2     Cap Placement and Integrity
       3.3.12.3     Cap Thickness and Coverage Determination
   3.4      TOW BOATS AND SCOWS           
     3.4.1     Tow Boats
     3.4.2     Scows
       3.4.2.1      Scow Pocket Doors

- -- End of Section Table of Contents --


                    SECTION TABLE OF CONTENTS 02482 PAGE 2
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT


                                 SECTION 02482

                                   DREDGING

PART 1    GENERAL

1.1  DEFINITIONS

1.1.1     Soft Material

  "Soft" or maintenance material is defined as the accumulated silty sediments
  within the channel and berth areas. The "soft" material also includes material
  that sloughs off the banks when dredging adjacent to the piers in the berth
  areas. Permits require that all "soft" material, regardless of its depth or
  location in the work, be removed by a special environmental bucket, and sealed
  in cells dredged beneath the federal channels as specified in this section and
  as indicated on the contract drawings. All material, capable of being removed
  using the environmental bucket, will be considered soft material, unsuitable
  for unconfined ocean disposal.

1.1.2     Hard Material

  "Hard material" is defined as parent improvement material, except rock, to be
  removed from Boston Harbor after removal and disposal of the overlying soft
  material with the environmental bucket. Hard material shall be removed as
  specified in this Section, and as indicated on the contract drawings. Rock
  material is defined in Section 02491 UNDERWATER DRILLING AND BLASTING.

1.2  RELATED WORK SPECIFIED ELSEWHERE

  a. Additional requirements relative to water quality monitoring and testing,
  and submittal of Environmental Bucket Performance Data are specified in
  Section 01135 WATER QUALITY MONITORING AND CONTROL.

  b. Additional requirements relative to water quality monitoring and testing,
  including protection of finfish and marine mammals, are specified in
  Sections 01130 ENVIRONMENTAL PROTECTION and 02491 UNDERWATER DRILLING AND
  BLASTING.

1.3  SUBMITTALS

  Government approval is required for submittals with a "GA" designation;
  submittals having "FIO" designation are for information only. The following
  shall be submitted in accordance with Section 01300 SUBMITTALS:

     SD-1 Data

  Inspection of Disposal; FIO, C Reviewer.

  Submit names of inspectors certified by the Corps of Engineers to be used for 
  monitoring disposal activities for the Government.

  Scow Cards; GA, C Reviewer.

  Submit scow cards for each scow to be used for contract work. Scow cards shall
  have information specified in paragraph "Scows."

  Disposal Positioning Plan; GA, C Reviewer.

  The Contractor shall submit a disposal positioning plan, which details the 
  method proposed to position the scows over the disposal cells and to locate

                             SECTION 02482 Page 1



      
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  the limits of the disposal cells which may be DGPS, laser technology or other
  means of identifying the scows position and orientation before disposal. A
  means of visually verifying location, such as computer imaging, shall be
  integral with the positioning system.

  Work Plan; GA, E Reviewer.

  The Contractor shall submit a work plan for construction of the in-channel
  disposal cells, channel dredging, and berth dredging. Anticipated equipment,
  cells locations, cell capacity, temporary soft material storage method and
  location, expected coordination requirements, survey requirements, soft
  material placement, sloughing calculations at berths, proposed measures for
  avoiding pier damage, potential underwater diving operations and proposed
  measures to avoid overdredging, are items to be considered, at a minimum, for
  inclusion in the work plan.

  Cell Capping Plan; Ga, E Reviewer.

  Submit a cell capping plan describing the source and gradation of capping
  material, a complete sequence and schedule of events, proposed equipment to be
  used, and the methods to be employed to ensure the proper capping of cells as
  specified. The plan shall also include the Contractor's proposed methodology
  for cap thickness and coverage determination. Submit a 20 pound representative
  sample of the capping material to the Contracting Officer.

  Cell Cap Thickness and Coverage Determination Data; GA, E Reviewer.

  Submit cell capping thickness and coverage determination data for each cell
  capped, within 14 days of completion of data collection. Include data
  collection methods and results obtained. Provide a certification for each cell
  that the cell construction is in compliance with the performance requirements
  of these specifications. If a cell is not in compliance, then state the
  materials and methods proposed to achieve compliance.

  MWRA Water Tunnel Removal Plan; GA, E REviewer.

  Submit the proposed method of demolition and removal of the MWRA "Old Section
  38" water tunnel. Include the proposed procedures for breaking-up the tunnel,
  removing all of the resulting debris, and verifying that the tunnel has been
  completely removed.

  Abandoned Cable - Boston Edison; GA, E Reviewer.

  Submit the proposed method of dredging operation in the vicinity of Boston
  Edison power lines (both live and abandoned) near the Chelsea Street bridge.
  The submittal shall include, but not be limited to : notification contacts;
  locating procedures, including diving operations as necessary; and
  coordination prior to moving lines.

1.4  EXISTING CONDITIONS

1.4.1   Material to be Dredged

  Dredged material is referred to in these specifications as either "soft"
  material, "hard" material, "rock" or "debris." The material to be removed to
  accomplish the specified dredging work is anticipated to be silt, sand, clay,
  glacial till and rock. Requirements for the excavation of rock material are
  specified in Section 02491 UNDERWATER DRILLING AND BLASTING. The Contractor is
  expected to examine the site of the work and determine the character of the
  materials to be dredged.

1.4.2   Results of Explorations

  Explorations to determine the character of materials to be removed, have

                             SECTION 02482 Page 2
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

  been made by the Government for selected areas of this project. Graphic logs
  of explorations are shown on the contract drawings. Grain size analysis curves
  are attached at the end of this section. Although the results of such
  explorations are representative of subsurface conditions at their respective
  locations and for their respective vertical reaches, local variations in the
  subsurface materials are to be expected and, if encountered, will not be
  considered materially different within the purview of the contract.

1.4.3   Existing Reports and Historical Data

  Listed below are reports and historical data, relative to the dredging of
  Boston Harbor, which are available for viewing at the Corps of Engineers
  District Office. Advance arrangements to view the reports may be made with Mr.
  Peter Jackson (978) 318-8861.

     U.S. Army Corps of Engineers, and Massachusetts Port Authority, 1994, Draft
     Environmental Impact Report (EOEA File Number 8695) and Draft Environmental
     Impact Statement, Boston Harbor, Massachusetts, Navigation and Berth
     Dredging Project, 2 volumes, April 1994.

     U.S. Army Corps of Engineers, and Massachusetts Port Authority, 1995, Final
     Environmental Impact Report (EOEA File Number 8695) and Final Environmental
     Impact Statement, Boston Harbor, Massachusetts, Navigation and Berth
     Dredging Project, 3 volumes, June 1995.
     
     U.S. Army Corps of Engineers, Design Memorandum, Boston Harbor,
     Massachusetts, Navigation Improvement Project, April 1996.

     ENSR. Oct. 1997, Summary Report of Independent Observations Phase 2 - 
     Boston Harbor Navigation Improvement Project. Prepared for Massachusetts
     Costal Zone Management. ENSR Document Number 4479-001-150, ENSR, Acton, MA.

     Science Applications International Corporation, Postcap Monitoring of
     Boston Harbor Navigation Improvement Project (BHNIP) Phase 1: Assessment of
     Inner Confluence CAD Cell, Prepared for U.S. Army Corps of Engineers, SAIC
     Report No. 413, SAIC, Newport, RI.

     Written report for "Sample Event #3" prepared by the U.S. Army Corps of
     Engineers Environmental Laboratory, Hubbardston, MA. Reference Section
     01135 WATER QUALITY MONITORING AND CONTROL Paragraph "WATER COLUMN
     MONITORING - BASELINE."

1.4.4   Artificial Obstructions

  The Contractor may encounter bottom debris such as, but not limited to, pieces
  of broken cable, rope, miscellaneous metal, and broken and abandoned piles.
  The Government has no knowledge of existing wrecks, wreckage, or other
  artificial obstructions of such size or character as to require the use of
  explosives for its removal. However, special or additional plant may be
  required for economical removal of some items, such as abandoned pilings, and
  the obstruction described below in paragraph "Clearing of Main Ship Channel
  Debris." During dredging operations, the Contractor shall remove all debris
  encountered. Debris removed from the dredging area shall be separated and
  stockpiled for disposal. Disposal in accordance with local, Federal, and State
  laws and regulations shall be the responsibility of the Contractor. In case
  the actual conditions differ from those stated or shown, or both, an
  adjustment in contract price or time of completion, or both, will be made in
  accordance with "FAR 52.236-2, Differing Site Conditions."

1.4.5   Existing Utilities

1.4.5.1   Private Utilities and Public Agencies

                             SECTION 02482 Page 3
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT


  The following tabulation of utility owners and public agencies is provided for
  the convenience of the Contractor:

      a.  Edison: Contact Beverly Shultz (617) 424-2711.

      b.  NYNEX: Contact Everette Bryan (617) 381-6423.

      c.  Boston Gas: Contact Dennis Peri (617) 723-5512 ext 4434.

      d.  MWRA: Contact John McComack (617) 241-4637.

1.4.5.2   Protection of Utility Lines

  Existing utility lines that are shown on the drawings or the locations of
  which are made known to the Contractor prior to dredging, and that are to be
  retained, shall be protected from damage during dredging, and if damaged shall
  be satisfactorily repaired by the Contractor at no additional cost to the
  Government. Prior to commencement of dredging, the Contractor shall coordinate
  with the Contracting Officer and the applicable utility company to mark the
  exact locations of existing utilities, and establish in detail the proposed
  method of protecting the existing utilities. In the event that the Contractor
  damages any existing utility lines that are not shown on the drawings or the
  locations of which are not known to the Contractor, report thereof shall be
  made immediately to the Contracting Officer. If the Contracting Officer
  determines that repairs shall be made by the Contractor, such repairs will be
  ordered under the Contract Clause entitled "DIFFERING SITE CONDITIONS."

1.4.5.3   Removal of Utility Lines

  The Contracting Officer and the applicable utility company or owner shall be
  notified in ample time to mark the exact locations of existing utilities to be
  removed under this contract, and establish in detail the proposed method of
  protecting any existing adjacent utilities.

1.5  OVERDEPTH AND SIDE SLOPES

1.5.1   Allowable and Required Overdepth

  To cover the inaccuracies of the dredging process, material actually removed
  from within the specific areas to be dredged, to depths as specified below for
  allowable overdepth, will be estimated and paid for at the contract price.
  Allowable overdepth dredging will be permitted to a depth of not more than 1.7
  feet for all dredging will be permitted to a depth of not more than 1.7 feet
  for all dredging areas shown, except in areas of rock excavation. There is a
  required overdepth for rock excavation only. Overdepth dredging of rock will
  be required to a depth of not more than 2 feet below the project depth in all
  dredging areas where rock is encountered. An allowable overdepth will be
  permitted to a depth of not more than 2 feet below the required overdepth in
  all areas where rock excavation is performed. Allowable and required overdepth
  dredging will be measured and paid for at the applicable contract price in the
  same manner as specified for the overlying dredge material.

1.5.2   Side Slopes

1.5.2.1   Side Slopes at Disposal Cells

  The Contractor shall construct disposal cells with side slopes of 1 vertical
  to 2 horizontal. However, the Contractor may construct the side slopes steeper
  than 1 vertical to 2 horizontal to increase cell volume, as approved by the
  Contracting Officer on a case by case basis. Contracting Officer approval will
  be based on the impact steeper slopes will have on the stability of adjacent
  structures and the stability of the cell.. Cells shall be constructed to
  maintain a 50 foot separation from the edge of the

                             SECTION 02482 Page 4
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  federal channel limits and all adjoining cells.

1.5.2.2   Side Slopes at Berths

  Material actually removed, within the limits approved by the Contracting
  Officer, to provide for final project depth at the land side of the berths and
  1 vertical on 3 horizontal elsewhere, but not in excess of the amount
  originally lying above these limiting side slopes, will be estimated and paid
  for, whether dredged in the original position or by dredging the space below
  the pay slope plane at the bottom of the slope for upslope material capable
  of falling into the cut. In computing the limiting amount of side slope
  dredging, an overdepth of 1.7 feet measured vertically will be used. The
  above is not to be taken as a guarantee that all slopes will stand on a slope
  of 1 vertical and 3 horizontal. The Contractor shall make his own
  determination as to what the angle of repose will be on all side slopes. The
  Contractor will be required to exercise care in dredging near wharfs and piers
  so as not to overdredge to such an extent as to undermine the structures or in
  any way impair the stability of such structures.

1.5.3   Excessive Dredging

  Material taken from beyond the limits as extended in paragraph OVERDEPTH AND
  SIDE SLOPES above will be deducted from the total amount dredged as excessive
  overdepth dredging, or excessive side-slope dredging for which payment will
  not be made.

1.5.4   Protection of Existing Structures

  The Contractor shall conduct the dredging operation such that it does not
  undermine, weaken or otherwise impair existing structures located in or near
  the areas to be dredged. The Contractor shall investigate the existing
  structures at the site and plan the dredging work accordingly. The Contractor
  shall be held responsible for any damage to the existing facilities resulting
  from dredging. The Contractor could be directed by the Contracting Officer to
  fill overdredged areas with clean material at no cost to the Government.
  Filling of overdredged areas may require permit modifications to be obtained
  by the Contractor.

1.6     INSPECTION OF DISPOSAL

  No disposal shall be done unless an inspector, approved by the Contracting
  Officer is present. The inspector shall be available on a full-time basis to
  cover all phases of operations in connection with disposal of the dredged
  materials.

  The Contractor shall be responsible for and provide qualified disposal
  inspection services at no additional cost to the Government. The Contractor
  shall notify the Contracting Officer of the names of the Corps of Engineers
  Certified inspectors to be used prior to commencement of work. Every discharge
  of dredge material must be officially witnessed and properly documented by an
  onboard inspector who has been trained by, and who holds a current
  certification from the New England District, Army Corps of Engineers. Failure
  to adhere to this requirement will be considered a serious violation of this
  contract and cause for an immediate stop-work order by the Contracting Officer
  and which could precipitate substantial penalties including but not
  necessarily limited to fines, withholding of funds and/or non-payment due to
  misplaced materials.

1.6.1   Communication

  The Contractor shall provide the Contracting Officer with 2 hand-held VHF
  radios capable of communicating with the Contractor's marine plant for the
  duration of the contract.

1.6.2   Transportation

                             SECTION 02482 Page 5
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  The Contractor shall furnish, on the request of the Contracting Officer or
  Independent Observer, the use of such boats, boatmen, laborers, and material
  forming a part of the ordinary and usual equipment and crew of the equipment
  or marine plant as may be reasonably necessary in inspecting and monitoring
  the work. The Contractor shall furnish, on the request of the Contracting
  Officer or Independent Observer, suitable transportation from all points on
  shore designated by the Contracting Officer to and from the various pieces of
  plant, and the work site.

PART 2    PRODUCTS

2.1  CLEAN GRANULAR MATERIAL FOR CAPPING DISPOSAL CELLS 

  The material used to cap the soft material in the disposal cells shall be
  clean well-graded granular material which primarily sand having less than 10%
  of the material passing a #200 sieve and less than 10% of the material
  retained by a #4 sieve. The Contractor shall provide grain size data and
  representative samples of cap material to the Contracting Officer as part of
  the capping plan.

PART 3    EXECUTION

3.1  CONDUCT OF DREDGING WORK

3.1.1     Order of Work

  The Contractor shall start and complete the work in the order of precedence as
  prescribed below or as otherwise approved by the Contracting Officer. See
  Section 01010 for additional requirements relative to project coordination and
  sequence of work.

  The Contractor shall first construct a single disposal cell. Cell construction
  shall commence by dredging and storing the overlying soft material, and
  transporting the dredged hard material to Massachusetts Bay Disposal Site
  (MBDS) for disposal. Once the initial disposal cell has been constructed,
  dredging of the channel and berth areas shall begin. After soft material has
  been placed in a disposal cell, capping of the cell shall commence as
  specified in paragraph "CONSTRUCTION OF IN-CHANNEL DISPOSAL CELLS" below.

  The Contractor shall prepare and submit to the Contracting Officer for review
  and approval a progress schedule in accordance with Section 01010, Paragraph
  "Work Sequence."

3.1.2   Disposal of Excavated Material

  The material excavated shall be transported and disposed as specified in this
  section in paragraph DREDGING BOSTON HARBOR. Other dredged material disposal
  providing a beneficial use such as landfill daily cover or capping, as
  identified by the Contractor and approved by the Contracting Officer, is
  encouraged. Except as otherwise authorized by the Contracting Officer in
  writing, no dumping shall be done unless an inspector approved by the Corps of
  Engineers is present at the time.

  Any material that is deposited elsewhere than in places designated or approved
  by the Contracting Officer will not be paid for and the Contractor will be
  required to remove such misplaced material and deposit it where directed at
  the Contractor's expense.

3.1.3   Interference with Navigation

  Minimize interference with the use of channels and passages. The Contracting
  Officer will direct the shifting or moving of dredges or the interruption of
  dredging operations to accomodate the movement of vessels

                             SECTION 02482  Page 6

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  and floating equipment, if necessary. The Contractor shall comply with all
  requests from the Contracting Officer to move or interrupt dredging operations
  for a reasonable time period at on additional cost to the Government. During
  winter months there is heavy usage of the Chelsea River by tankers;
  coordination with docking pilots will be necessary on a daily basis.

3.1.4   Ranges, Gages, and Lines

  Furnish, set, and maintain ranges, buoys, and markers needed to define the
  work and to facilitate inspection. Establish and maintain gages in locations
  observable from each part of the work so that the depth may be determined.
  Suspend dredging when the gages or ranges cannot be seen or followed. The
  Contracting Officer will furnish, upon request by the Contractor, survey
  lines, points, and elevations necessary for the setting of ranges, gages, and
  buoys.

3.1.5   Method of Communication

  Provide a system of communication between the dredge crew, the
  sampling/monitoring contractor, the towboat, the Independent Observer, the
  disposal inspector, and the Contracting Officer. Portable two-way marine
  radios are acceptable.

3.1.6   Debris Management

  A debris management plan shall be developed, accepted by the Contracting
  Officer and followed by the Contractor. The plan shall be submitted as part of
  the Environmental Protection Plan, as specified in Section 01130 ENVIRONMENTAL
  PROTECTION. This plan shall include accommodation for specific removal of the
  debris identified in paragraph "Clearing of Main Ship Channel Debris" below,
  as well as latent debris discovered during dredging operations. Each day
  during dredging operations, the Contractor shall use a boat to collect and
  remove floating debris resulting from project activities. Floating debris
  shall also be removed from within barges. Debris removed from the bottom
  during dredging operations, which is not suitable for disposal in the cells or
  at the Massachusetts Bay Disposal Site (MBDS), shall also be collected and
  removed from the site. Abandoned and broken piles within 25 feet of a
  structure shall be broken or cut off rather than extracted. Containers for
  temporary storage of the collected debris shall be maintained on the dredge or
  support barge.

3.1.6.1   Clearing of Main Ship Channel Debris

  An obstruction has been identified in the -35 - foot portion of the Main Ship
  Channel opposite Castle Island, as shown on the contract drawings. The
  Contractor shall locate and remove the debris. A plan for locating, removing,
  and disposing of the debris shall be included in the Contractor's "Debris
  Management Plan".

3.1.7   Underwater Diving Operations

  In the event that underwater diving operations become necessary due to the
  work of this contract, such operations shall be conducted in accordance with
  Section 02492 UNDERWATER WORK.

3.2  DREDGING BOSTON HARBOR

  Consistent with the environmental dredging window restrictions, the Contractor
  shall begin by constructing the initial disposal cell. Once the disposal cell
  is excavated, dredging of the Boston Harbor Channels and berths shall
  commence.

3.2.1   Dredging of Soft Material

                             SECTION 02482 Page 7



<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  An environmental bucket shall be used for dredging the soft material from
  Boston Harbor. No dragging of material will be allowed except as directed by
  the Contracting Officer. The soft material shall be transported in scows and
  deposited in the in-channel disposal cells shown on the drawings. Construction
  of the in-channel disposal cells is specified below in paragraph "CONSTRUCTION
  OF IN-CHANNEL DISPOSAL CELLS" The maximum distance soft material must be
  transported will not exceed 7 nautical miles. Placement of soft material in
  disposal cells will only be permitted during the interval 1 hour before high
  tide to 2 hours after high tide. No disposal shall take place during passage
  of tugboat in escort of large vessels, such as tankers, while the vessel is
  within 1000 feet of a disposal cell until the Contracting Officer directs
  otherwise. Use of a fully automated horizontal positioning system capable of
  locations within 1.0 meter of the true position is required to ensure proper
  positioning of the scows over the disposal cell.

3.2.2   Dredging of Hard Material

  The environmental bucket is required only for the removal of soft material.
  Hard material shall be placed in dump scows and transported to the
  Massachusetts Bay Disposal Site and disposed at a taut wire buoy. The location
  of the Mass Bay Disposal Site is shown on the drawing attached at the end of
  this section. The National Marine Fisheries Service (NMFS) has placed specific
  conditions governing the use of the Massachusetts Bay Disposal Site: See
  Section 01130 ENVIRONMENTAL PROTECTION for information on the NMFS conditions
  governing the use of the Massachusetts Bay Disposal Site.

3.2.3   Dredging of Berth Areas

  The Contractor shall dredge the berth areas shown on the drawings. The limits
  of the berth areas shall be verified with the berth owners and the Contracting
  Officer prior to dredging. Dredging of the berth areas shall be performed as
  the adjacent Federal Channel is dredged. The requirements listed above for
  dredging of soft and hard material apply to dredging of the berth areas.
  However, prior to removing the dredge plant from the site, the Contractor will
  make a final pass along the fender face to remove material expected to slough
  off of the slope under the piers. Sloughed material removed from the trench
  shall be disposed in the in-channel disposal cells. The Contractor is directed
  not to dig below the overdepth elevation.

3.2.4   Underwater Utilities

  Utility locations which are known are shown on the drawings. Utility companies
  contacted for information included: Boston Edison, Bell Atlantic, MWRA, Boston
  Gas, Boston Water and Sewer Commission, and the MBTA. Water and sewer
  pipelines, cables, and a gas siphon were identified in the Chelsea Creek area
  and cables were identified in the Reserved Channel. The Contractor shall note
  the location of these utilities and take special precautions when dredging in
  their vicinity. "No Spud" areas are marked on the contract drawings for
  protection of known utilities. The Contractor shall not dredge the area of
  channel over the MWRA "Section 8" waterline as noted on the contract drawings.
  The Contractor shall dredge the area of channel over the Boston Gas Siphon to
  a depth of -35 feet with an allowable overdepth of 1.7 feet, as shown on the
  contract drawings. To prevent damage to the gas siphon, the Contractor is
  directed not to dig below the overdepth elevation. Removal of the "Old Section
  38" abandoned water tunnel shall be completed prior to dredging the area over
  the gas siphon.

3.2.5   Removal of Abandoned Water Tunnel

  The Contractor shall verify the location and remove the abandoned MWRA 
  concrete lined water tunnel known as "Old Section 38" to the limits as

                             SECTION 02482 Page 8



<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  shown on the contract drawings. The Contractor shall submit a proposal
  detailing the methods he intends to implement to accomplish demolition and
  removal of the water tunnel. Demolition methods may include underwater
  cutting, breaking, controlled blasting and other methods approved by the
  Contracting Officer. Underwater blasting shall be performed in accordance with
  Section 02491 UNDERWATER DRILLING AND BLASTING, with peak particle velocities
  no greater than 1.0 inch per second, due to the proximity of the gas siphon.

3.3  CONSTRUCTION OF IN-CHANNEL DISPOSAL CELLS

3.3.1   Work Restrictions for the Protection of Fisheries

  Cell excavation and disposal activities located upstream of the Tobin Bridge
  in the Mystic River and at cells 1, 2, and 3 in the Inner Confluence occurring
  from February 15 to June 15 shall be conducted with a fish startle system,
  sonar, and an approved fisheries observer. However, the Contractor has the
  option of not performing cell excavation and disposal activities at these
  cells during the above time period; provided all contract work can be
  performed within the specified prosecution period. See Section 01130
  ENVIRONMENTAL PROTECTION for fisheries observer, fish startle system and,
  sonar equipment requirements. No restrictions are placed on work for the
  protection of fisheries in the Chelsea River upstream of the McArdle Bridge
  (Meridian Street).

  Cell excavation and disposal activities will not be permitted during the
  period February 15 to June 15 of any year at cell locations 3A, 4, 5, 6, 7, 8,
  and 9 in the Inner Confluence, as shown on the contract drawings.

3.3.2   Location and Number of Cells

  All dredged soft material, which by definition is unsuitable for unconfined
  ocean disposal, shall be placed in cells dredged beneath the federal channels
  and the unsuitable material shall be capped. Capping of any cell shall be
  completed within 30 days of the start of cap placement. The soft material may
  swell as much as 50% prior to consolidation within the cells and the cells
  shall be sized accordingly. After actual swell and consolidation data is
  obtained from Government and Contractor surveys during the prosecution of the
  work, the Contractor shall use that data to size future cells.

  The disposal cells shall be located in the areas shown on the drawings.
  Coordinates delineating the limits of each of the constructed in-channel
  disposal cells shall be furnished to the Contracting Officer. The Contractor
  shall size the disposal cells to contain all soft material dredged, including
  material which may slough off of the slope under the piers adjacent to the
  berths and incidental hard material if dredged along with the soft material.
  Post-dredge soundings will be provided by the Government for both berths and
  the disposal cells in order to calculate soft material volumes before dredging
  of the hard material. It is the Contractor's responsibility to ensure adequate
  disposal cell capacity exists for all soft material to be dredged. The
  Contractor will be required to continue to dredge additional disposal cells at
  his expense for disposal of all of the soft material dredged. However, cell
  construction shall be programmed to ensure that no empty or partially filled
  cells remain at the completion of soft material disposal operations. A table
  of disposal cell locations and proposed cell depths is attached at the end of
  this section. The coordinates given in the table serve as a guide only and
  will be adjusted by the Contracting Officer dependant on the actual field
  conditions encountered.

3.3.3   Verification of Electronic Positioning System

  Visual indicators shall be deployed clearly delineating the disposal cells 
  during all periods of active disposal into the cells, until the accuracy of

                             SECTION 02482 Page 9
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

  electronic positioning equipment is verified by the Contracting Officer. Use
  of differential global positioning system (DGPS) accurate to 1 meter or
  better, with real time graphic display will satisfy this condition. The
  purpose of this requirement is to enable the dredge operator and regulatory
  agency inspectors to verify that disposal occurs into the permitted cells.

3.3.4   Cell Filling at High Tide 

  Sediment disposal into any cell shall occur only during high tide, defined for
  this activity as the time from 1 hour before to 2 hours after the predicted
  Boston high tide time. The purpose of this requirement is to provide maximum
  dilution and minimal dispersion and transport of fine contaminated sediment
  during disposal operations. If an alternative technology is proposed and
  approved by the Contracting Officer that allows the material to be placed
  directly in the disposal cell without passing through the water column,
  disposal may occur at any time during the tidal cycle.

3.3.5   Cell Construction Surveys by the Government

  The following bathymetric surveys will be conducted by the Government during
  cell construction: A pre-dredge survey will be made by the Government prior to
  commencement of dredging operations; an after-dredge survey will be made by
  the Government after the dredging of the soft material from the cells; a
  survey will be made by the Government immediately prior to the commencement of
  cell capping; and an after-dredge survey will be made by the Government after
  the sand cap is placed. The Contractor shall notify the Contracting Officer a
  minimum of 5 days prior to completion of an item of work listed above that
  requires a Government survey to allow adequate time to prepare for the
  surveys. The Contractor shall also allow a reasonable amount of time for the
  completion of each Government survey. For the first cell, the range of the
  survey will be 1 barge length (up to 300 feet) beyond the perimeter of the
  cells. For subsequent cells, the range of the survey will be at least 50 feet
  beyond the perimeter of the cell. If a placement problem is detected, then the
  Contractor will be required to remove all misplaced material and deposit it in
  the cell and to submit a revised positioning plan for Contracting Officer
  approval.

3.3.6   Cell Construction Surveys by the Contractor

  The following bathymetric surveys shall be conducted by the Contractor during
  cell construction: After dredging of hard material from cells; after placement
  of soft material in cells; and within 2 weeks after capping as specified below
  in paragraph, "Cap Thickness and Coverage Determination." Surveys shall be run
  on 25 foot intervals, with all subsequent surveys done on the same spacing,
  tracks and reference lines. Copies of all Contractor surveys shall be
  submitted to the Contracting Officer within 2 days after completion of the
  respective survey. For the first cell, the range of the Contractor survey
  shall be 1 barge length (up to 300 feet) beyond the perimeter of the cells.
  For subsequent cells, the range of the Contractor survey will be at least 50
  feet beyond the perimeter of the cell. If a placement problem is detected,
  then the Contractor will be required to remove all misplaced material and
  deposit it in the cell and to submit a revised positioning plan for
  Contracting Officer approval. Further surveys by the Contractor may be
  required to verify accurate placement of the soft material and the cell cap.

3.3.6.1  Documentation

  The results of bathymetric surveys performed by the Contractor and by the
  Government shall be combined and documentation provided by the Contractor for
  all cells as follows:

     a.  Cell bottom elevation and status (i.e., active disposal, completed

                             SECTION 02482 Page 10
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

     disposal, completed capping, etc.) of all cells shall be shown in matrix
     chart form, similar to the chart attached at the end of this section;

     b. the matrix chart shall be provided to the Contracting Officer within 7
     business days of completion of the caps for each of the first three cells
     and thereafter as specified below;

     c. the matrix chart shall be updated and provided to the Contracting
     Officer every three months thereafter throughout the remainder of the
     project;

     d. Contractor and Government bathymetric survey data shall be shown in
     graphic form for each cell where disposal has occurred. This graphic
     report shall be provided to the Contracting Officer within 30 days of
     completion of each cap.

3.3.7   Passage of Vessels

  No cell shall be filled during passage of tug boat in escort or tanker vessels
  while the vessel is within 1000 ft of the disposal cell.

3.3.8   Initial In-channel Disposal Cell

  Soft material overlying the area of the initial in-channel disposal cell shall
  be dredged using an environmental bucket and the material temporarily stored
  in tight scows or other suitable containers within a reasonable distance of
  the disposal cell. The environmental bucket shall conform to the performance
  standards as indicated in Section 01135 WATER QUALITY MONITORING AND CONTROL.

3.3.9   Dredging of Hard Material in Cells

  After the soft material is removed the Contractor will be allowed to change
  buckets to remove the underlying hard material. The hard material shall be
  placed in dump scows and transported to the Massachusetts Bay Disposal Site
  for disposal at a taut wire buoy.

3.3.10  Placement of Soft Material in Cells

  Overlying soft material, stored in scows during construction of the initial
  disposal cells, shall be carefully placed in the disposal cells as specified.
  Placement of soft material within the disposal cells shall be such that
  mounding of the soft material is minimized. The Contractor shall redistribute
  all mounds of soft material that project above the -45 foot MLLW datum to
  other areas of the disposal cells.

3.3.11  Documentation

  The origin of the last barge load of sediment placed in each cell shall be
  documented and provided to the Contracting Officer with the final project
  report, as required by Section 01175 WATER QUALITY MONITORING AND CONTROL.

3.3.12  Capping of In-Channel Disposal Cells

3.3.12.1  General

  After placement of soft material in a disposal cell, the Contractor will be
  required to wait a minimum of 30 days, but not more than 60 days, to allow the
  soft material to settle before closing the cell. Each cell shall be closed by
  construction of a cell cap, consisting of 2 uniform layers of the specified
  clean granular fill material. Each cell cap shall be constructed a minimum of
  3 feet thick over the top of the soft material. Capping of a cell shall be
  completed within 30 days of the start of cap placement. The Contractor shall
  submit a capping plan for approval prior to placement of

                            SECTION 02482  Page 11
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  the cap. Cap material shall be as specified above. Precautions shall be taken
  to ensure that no portion of the cap projects above -42 feet MLLW, Portions of
  the cap protruding above -42 MLLW may require removal as directed by the
  Contracting Officer at the expense of the Contractor.

  In addition to capping the cells constructed by the Contractor under this
  contract, the Contractor shall complete the cap on the southern portion of the
  existing disposal cell of maintenance material constructed in July 1997.
  Final capping of this cell shall be completed within two months of the channel
  deepening in the Inner Confluence. However, completion of this in capping the
  first 3 disposal cells. The location of the existing cell is shown on the
  contract drawings. Completion of the cap on the existing cell shall comply
  with requirements for capping of Contractor constructed cells.

3.3.12.2  Cap Placement and Integrity

  The disposal cell cap shall be placed gradually, in 2 uniform layers, so as to
  minimize disturbance to the unconsolidated soft material in the disposal
  cells. In order to calculate drift of cap material during placement, the
  Contractor shall measure and record real time current measurements at the
  surface, mid-level and at the bottom of the water column in the immediate area
  of the capping operation. The cap placement method shall be adjusted to ensure
  necessary cap thickness over the entire cell area. The Contractor shall ensure
  that the edges of the cap meet the minimum thickness requirement. Further,
  there shall be no mechanical disturbance of the sand cap by means including
  but not limited to drag bar, clamshell bucket, and barge spudding, unless such
  disturbance is pre-approved by the Contracting Officer. Obtaining core samples
  will not be considered "mechanical disturbance".

3.3.12.3  Cap Thickness and Coverage Determination

  Within two weeks of capping, each of the first three disposal cells shall be
  surveyed by the Contractor using a combination of methods to verify to the
  Government that each cap has three feet of thickness over a minimum of 90% of
  the cell and that the zone of mixed dredged silt and cap material (i.e.,
  within the three foot cap) is less than 12 inches. Methods used to provide
  this verification shall include acoustic sub-bottom profiling, vibracore
  sampling consisting of a minimum of 4 cores per acre, and may include other
  proven technologies. Vibracore sampling shall consist of 4 cores per acre,
  with a minimum of 3 cores per cell. The location of the cores shall be as
  selected by the Contracting Officer Unproven technologies may be acceptable
  for cap thickness and coverage determination provided proper validation is
  furnished to the Contracting Officer for his approval. After the Contractor
  has proven the effectiveness of his cap thickness and coverage determination
  methodology for the first three cells, the Contracting Officer will approve
  the methodology for cell cap verification for all other project cells.

  The Contracting Officer will determine the effectiveness of the Contractor's
  cap thickness and coverage determination methodology, and will so acknowledge
  in writing.

  If the Contractor's cap thickness and coverage determination methodology has
  not been approved within three months of completion of the first cell cap,
  then disposal in all other project cells shall cease. New cell construction
  will not be permitted until new or additional cap placement verification
  methodology is proposed by the Contractor, accepted by the Contracting Officer
  for trial, and its effectiveness demonstrated by the Contractor on completed
  cells.

  If data collected indicates that a completed cell is not in compliance with 
  these specifications, the Contractor shall continue capping operations and 
 
                             SECTION 02482 Page 12



<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT


    cap verification testing until contract compliance is demonstrated.


3.4     TOW BOATS AND SCOWS

    See also Section 01600 PLANT AND EQUIPMENT

3.4.1   Tow Boats

    All tow boats used for towing to disposal areas shall be equipped with DGPS
    and track recording navigational equipment of approved equivalent electronic
    navigation equipment, radar, corrected compass, marine radio, and depth
    sounding equipment which is to be maintained in operating condition during
    each tow. The tow boats utilized by the Contractor for this purpose shall be
    of a size adequate for towing in the open ocean and shall have necessary
    reserve power for maneuvering with scows and under emergency conditions as
    well as for control of scows at the disposal point.

3.4.2   Scows

    The Contractor shall provide and maintain markings on all scows clearly
    indicating the draft of the scow and shall provide scow cards for each scow
    used on the contract work. The scow cards shall show dimensions and volumes
    of individual pockets of scows and total volumes for varying depths below
    coaming or top of pockets. The Contractor shall also provide draft verses
    displacement curves for all scows. This is to enable the Contracting Officer
    personnel to make determination of scow volume and corresponding drafts
    under partial and full load conditions. These measurements are to be made at
    the time of initial use of each scow. This information will then be
    furnished to disposal inspectors to enable them to estimate scow volume from
    draft of scows for each scow being towed to the disposal area. The scow
    volume estimates are for use in connection with disposal area monitoring
    studies and are not intended to be used in determining quantities dredged.
    At the beginning of the work and as additional scows arrive on the project,
    sufficient time shall be allowed by the Contractor and assistance of
    Contractor personnel shall be made available by the Contractor for the
    purpose of obtaining the measurements of each scow under various partial and
    full load conditions. During the entire period of contract work, the
    Contractor shall provide and maintain sufficient spot or floodlights to
    permit the reading of the draft on the sides of scows at bow and stern from
    the tow boat at night and when visibility is impaired. The draft readings
    will be required for each scow towed to the disposal area and will be made
    by the disposal inspector. The Contractor shall ensure that adequate time is
    allowed by the tow boat captain for these readings to be obtained.

3.4.2.1 Scow Pocket Doors

    Due to the fine nature of the dredge material, the Contractor will be
    required to achieve proper closure and adequate tightness of pocket doors to
    eliminate any seepage or leakage of material. The use of plastic material to
    cover cracks in scow pockets will not be allowed.

        -- End of Section --

                             SECTION 02482 Page 13
<PAGE>
 
             [MAP OF MASSACHUSETTS BAY DISPOSAL SITE APPEARS HERE]

Description:  This site is a circular area with a diameter of 2 nautical miles 
and center at 42 degrees 25.1' N, 70 degrees 35.0' W. From the center, the
Marblehead Tower bears true 295 degrees at 24,916 yards and Bakers Island Horn
bears true 308 degrees at 23,237 yards. The authorized disposal point (within
the overall disposal area) is specified for each dredging project in other
project documents. Depth range: 272 to 302 feet MLW.

NOTE:  The map depicts the disposal site's location in relation to landmarks.  
       It is not intended for use in navigation.
<PAGE>
 
                         BOSTON HARBOR DISPOSAL CELLS

                       GENERALIZED LOCATIONS AND DEPTHS

<TABLE> 
<CAPTION> 
Cell   Corner   Mass State Plane NAD27   Depth       Cell   Corner   Mass State Plane NAD27   Depth 
 No.    I.D.      Northing   Easting     (MLLW)       No.    I.D.      Northing   Easting     (MLLW) 
===============================================      ===============================================
<S>    <C>      <C>        <C>           <C>         <C>    <C>      <C>        <C>           <C> 
I1      NE        502,550    723,133       55         I7     NE        504,777    723,044       60
        SE        502,083    723,006                         SE        504,256    723,336
        SW        502,085    722,943                         SW        504,253    723,083
        NW        502,558    722,954                         NW        504,701    722,832
- -----------------------------------------------      -----------------------------------------------
I3      NE        503,646    723,188       55         I8     NE        505,062    723,564       60
        SE        503,146    723 166                         SE        504,889    723,664
        SW        503,155    722,969                         SW        504,319    723,358
        NW        503,654    722,990                         NW        504,797    723,092
- -----------------------------------------------      -----------------------------------------------
I3a     NE        504,190    723.312       55         I9     NE        505,324    724,032       55
        SE        503,701    723,191                         SE        505,149    724,128
        SW        503,704    722,991                         SW        504,916    723,711
        NW        504,204    723,014                         NW        505,090    723,614
- -----------------------------------------------      -----------------------------------------------
I4      NE        504,422    722,409       60         C1     NE        509,963    731,161       60
        SE        503,969    722,585                         SE        509,474    731,246
        SW        503,969    722,373                         SW        509,444    731,074
        NW        504,353    722,227                         NW        509,890    730,996
- -----------------------------------------------      -----------------------------------------------
I5      NE        504,828    722,851       48         C2     NE        509,449    731,250       58
        SE        504,388    722,565                         SE        509,028    731,324
        SW        504,480    722,425                         SW        509,950    731,160
        NW        504,875    722,681                         NW        509,419    731,078
- -----------------------------------------------      -----------------------------------------------
I6      NE        504,942    722,536       55         C3     NE        509,415    731,053       56
        SE        504,600    722,324                         SE        508,939    731,136
        SW        504,617    722,118                         SW        508,850    730,949
        NW        505,036    722,390                         NW        509,381    730,856
- -----------------------------------------------      -----------------------------------------------
</TABLE> 
<PAGE>
 
 
                         BOSTON HARBOR DISPOSAL CELLS

                       GENERALIZED LOCATIONS AND DEPTHS

<TABLE> 
<CAPTION> 
Cell   Corner   Mass State Plane NAD27   Depth       Cell   Corner   Mass State Plane NAD27   Depth 
 No.    I.D.      Northing   Easting     (MLLW)       No.    I.D.     Northing    Easting     (MLLW) 
===============================================      ===============================================
<S>    <C>      <C>        <C>           <C>         <C>    <C>      <C>        <C>           <C> 
C4      NE        509,879    730,972       56        C10     NE        507,155    730,300       65
        SE        509,440    731,049                         SE        508,727    730,040
        SW        509,405    730,852                         SW        506,831    729,869
        NW        509,754    730,791                         NW        507,259    730,129
- -----------------------------------------------      -----------------------------------------------
C5      NE        509,713    730,773       58        C11     NE        506,685    730,015       58
        SE        508,964    730,903                         SE        506,211    729,245
        SW        509,107    730,504                         SW        506,361    729,584
        NW        509,405    730,636                         NW        506,788    729,844
- -----------------------------------------------      -----------------------------------------------
C6      NE        508,909    730,913       55        C12     NE        506,163    729,815       58
        SE        508,754    730,749                         SE        505,649    729,245
        SW        508,878    730,403                         SW        505,795    729,159
        NW        509,061    730,484                         NW        506,318    729,558
- -----------------------------------------------      -----------------------------------------------
C7      NE        508,745    730,702       55         M1     NE        506,230    717,379       55
        SE        508,287    730,498                         SE        506,105    717,358
        SW        508,297    730,353                         SW        506,181    716,890
        NW        508,856    730,392                         NW        506,306    716,911
- -----------------------------------------------      -----------------------------------------------
C8      NE        508,236    730,499       55         M2     NE        506,056    717,350       55
        SE        507,738    730,465                         SE        505,891    717,322
        SW        507,748    730,315                         SW        505,967    716,854
        NW        508,247    730,349                         NW        506,132    716,882
- -----------------------------------------------      -----------------------------------------------
C9      NE        507,688    730,461       65         M3     NE        506,101    717,915       70
        SE        507,198    730,326                         SE        506,017    717,901
        SW        507,301    730,155                         SW        506,097    717,407
        NW        507,698    730,312                         NW        506,222    717,428
- -----------------------------------------------      -----------------------------------------------
</TABLE> 

<PAGE>
 
 
                         BOSTON HARBOR DISPOSAL CELLS

                       GENERALIZED LOCATIONS AND DEPTHS

<TABLE> 
<CAPTION> 
Cell   Corner   Mass State Plane NAD27   Depth       Cell   Corner   Mass State Plane NAD27   Depth 
 No.    I.D.      Northing   Easting     (MLLW)       No.    I.D.      Northing   Easting     (MLLW) 
===============================================      ===============================================
<S>    <C>      <C>        <C>           <C>         <C>    <C>      <C>        <C>           <C> 
M4      NE        505,968    717,893       70        M10     NE        505,642    719,738       65
        SE        505,803    717,865                         SE        505,445    719,706
        SW        505,883    717,372                         SW        505,525    719,213
        NW        506,048    717,399                         NW        505,722    719,245
- -----------------------------------------------      -----------------------------------------------
M5      NE        506,057    718,190       60        M11     NE        505,395    719,698       60
        SE        505,965    718,221                         SE        505,198    719,666
        SW        506,009    717,950                         SW        505,278    719,172
        NW        506,093    717,964                         NW        505,478    719,205
- -----------------------------------------------      -----------------------------------------------
M6      NE        505,911    718,240       70        M12     NE        505,149    719,658       65
        SE        505,632    718,335                         SE        505,000    719,634
        SW        505,791    717,914                         SW        505,066    719,138
        NW        505,960    717,942                         NW        505,229    719,164
- -----------------------------------------------      -----------------------------------------------
M7      NE        506,011    718,711       55        M13     NE        505,697    720,304       60
        SE        505,729    718,664                         SE        505,603    720,289
        SW        505,993    718,575                         SW        505,683    719,796
        NW        506,025    718,628                         NW        505,832    719,820
- -----------------------------------------------      -----------------------------------------------
M8      NE        505,534    719,154       55        M14     NE        505,554    720,281       70
        SE        505,073    719,077                         SE        505,356    720,249
        SW        505,312    718,914                         SW        505,437    719,755
        NW        505,567    718,957                         NW        505,634    719,788
- -----------------------------------------------      -----------------------------------------------
M9      NE        505,840    719,770       56        M15     NE        505,307    720,241       65
        SE        505,691    719,746                         SE        505,110    720,209
        SW        505,772    719,253                         SW        505,190    719,715
        NW        505,920    719,277                         NW        505,387    719,747
- -----------------------------------------------      -----------------------------------------------
</TABLE> 
<PAGE>
 
 
                         BOSTON HARBOR DISPOSAL CELLS

                       GENERALIZED LOCATIONS AND DEPTHS

<TABLE> 
<CAPTION> 
Cell   Corner   Mass State Plane NAD27               Depth               Cell   Corner   Mass State Plane NAD27              Depth 
 No.    I.D.          Northing           Easting     (MLLW)               No.    I.D.         Northing           Easting     (MLLW) 
=================================================================        ===========================================================
<S>    <C>      <C>                      <C>         <C>                 <C>    <C>      <C>                     <C>         <C> 
M16     NE      505,060                  720,201               65         M22    NE        504,944               721,333          50
        SE      504,929                  720,180                                 SE        504,781               721,320
        SW      504,994                  719,683                                 SW        504,846               720,823
        NW      505,141                  719,707                                 NW        504,984               720,634
- -----------------------------------------------------------------        -----------------------------------------------------------
M17     NE      505,457                  720,822               55        M23     NE        505,371               721,875          55
        SE      505,266                  720,807                                 SE        505,160               722,122
        SW      505,348                  720,298                                 SW        505,238               721,407
        NW      505,669                  720,350                                 NW        505,408               721,421
- -----------------------------------------------------------------        -----------------------------------------------------------
M18     NE      505,216                  720,803               65        M24     NE        505,132               722,091          48
        SE      505,016                  720,787                                 SE        504,942               721,967
        SW      505,102                  720,258                                 SW        504,989               721,387
        NW      505,299                  720,290                                 NW        505,189               721,403
- -----------------------------------------------------------------        -----------------------------------------------------------
M19     NE      504,966                  720,783               65        M25     NE        504,894               721,936          48
        SE      504,852                  720,773                                 SE        504,801               721,875
        SW      504,923                  720,229                                 SW        504,775               721,369
        NW      505,052                  720,250                                 NW        504,939               721,383
- -----------------------------------------------------------------        -----------------------------------------------------------
M20     NE      505,412                  721,371               55                NE                                                
        SE      505,243                  721,357                                 SE                                                
        SW      505,283                  720,859                                 SW                                                
        NW      505,453                  720,873                                 NW                                                
- -----------------------------------------------------------------        -----------------------------------------------------------
M21     NE      505,193                  721,353               65                NE                                                
        SE      504,993                  721,337                                 SE                                                
        SW      505,034                  720,839                                 SW                                                
        NW      505,234                  720,855                                 NW                                                
- -----------------------------------------------------------------        -----------------------------------------------------------
</TABLE> 

<PAGE>
 
Disposal Cell Construction Status

Report Date:

<TABLE>
<CAPTIION>
- ------------------------------------------------------------------------------------------------------------------
                               Cell            Average          
               Channel        Corner         Bottom Elev.        Current  
Cell No.       Location     Coordinates         MLLW             Status*                    Remarks 
<S>            <C>          <C>              <C>                 <C>                        <C>  
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------
</TABLE>
 
                       *Status Key:  Cell Excavation Active (incl. date started)
                                     Cell Excavation Complete (include date)
                                     Disposal Active (incl. date started)
                                     Disposal Complete (include date)
                                     Capping Active (incl. date started)
                                     Capping Complete (include date)
                                     Cap verified (include date)
 
                                    Page 1 

          



<PAGE>
 
                     LOCATION INDEX OF SOILS TEST RESULTS

<TABLE> 
<CAPTION> 
AREA               BORING       SAMPLE  DEPTH (FT)        CLASSIFICATION
                                (SAMPLE ELEV -MLW)  
- --------------------------------------------------------------------------------
<S>                <C>          <C>                       <C>  
BOSTON ARMY BASE   FD-93-1              2.0 - 4.0         Silty SAND (SM)*
                                      (36.2 - 38.2)  
                   FD-93-2              4.0 - 6.0         Lean CLAY (CL)    
                                      (37.7 - 39.7)       (LL=47, PL=25, PL=22)
                   FD-93-3              4.9 - 6.9         Lean CLAY (CL) & SILT 
                                      (37.1 - 39.1)         (LL=37, PL=20,   
                                                             PI=17, SG=2.85)
                   FD-93-3              6.9 - 8.9         Silty SAND (SM)*   
                                      (39.1 - 41.1)  
- --------------------------------------------------------------------------------

NOTCH              FD-93-4              3.1 - 5.1         Lean CLAY (CL) & SLIT
                                      (41.7 - 43.7)         (LL=49, PL=26,   
                                                             PI=23)
                   FD-93-5              3.0 - 5.0         Lean CLAY (CL)* 
                                      (40.7 - 42.7)         (LL=49, PL=26,  
                                                             PI=23, SG=2.80)
                   FD-93-6              0.0 - 2.3         Lean CLAY (CL)*
                                      (36.7 -39.0)
                   FD-93-6              3.0 - 5.0         Lean CLAY (CL)*
                                      (39.7 - 41.7)   
- --------------------------------------------------------------------------------

_INNER CONFLUENCE FD-93-7               5.4 - 7.4         SAND (SP-SM)*
                                      (40.3 - 42.3)    
                  FD-93-7               7.4 - 9.4         Silty SAND (SM)*
                                      (42.3 - 44.3)         (SG=2.79)
                  FD-93-8               0.0 - 2.0         Silty SAND (SM)*
                                      (39.5 - 41.5)
                  FD-93-8               2.0 - 4.0         Clayey SAND (SC)*
                                      (41.5 - 43.5)
                  FD-93-9               2.0 - 4.0         Silty SAND (SM)*
                                      (42.5 - 44.5)
- --------------------------------------------------------------------------------

MYSTIC RIVER      FD-93-10              5.0 - 7.0         Clayey SAND (SC)*
                                      (41.7 - 43.7)         (SG=2.83)  
                  FD-93-12              2.5 - 3.5         Lean SILT and CLAY*   
                                      (38.6 - 39.6)       (LL=42, PL=21,   
                                                            PI=21)
                  FD-93-12              3.5 - 5.5         Silty SAND (SM)
                                      (39.6 - 41.6)      
                  FD-93-13              7.3 - 8.3         Fat CLAY (LL=51,
                                      (43.5 - 44.5)         PL=25, PI=26,
                                                            SG=2.80)
- --------------------------------------------------------------------------------

CHELSEA RIVER     FD-93-14              5.0 - 7.0         Sandy Silt (SM)*
                                      (40.3 - 42.3)        (SG=2.76) 
                  FD-93-14              7.0 - 9.0         Silty GRAVEL (GM)*
                                      (42.3 - 44.3)
- --------------------------------------------------------------------------------
</TABLE> 

* Grain size distribution curve included

<PAGE>
 
                  INDEX TEST RESULTS AND SAMPLE DESCRIPTIONS
                          BOSTON HARBOR TEST PROGRAM

<TABLE> 
<CAPTION> 
====================================================================================================================================
Boring     Sample     Liquid     Plastic     Plasticity     Specific    Sample Description
                       Limit      Limit        Index         Gravity
====================================================================================================================================
<S>        <C>        <C>        <C>         <C>            <C>         <C> 
- ------------------------------------------------------------------------------------------------------------------------------------
FD1          2                                                          Brown Fine to Medium SAND, little course send and fine 
                                                                         gravel, little silt
- ------------------------------------------------------------------------------------------------------------------------------------
FD2          3          47         25            22                     Gray lean CLAY, little silt, trace course to fine sand
- ------------------------------------------------------------------------------------------------------------------------------------
FD3          3          37         20            17           2.85      Gray lean CLAY, and SILT, trace gravel
- ------------------------------------------------------------------------------------------------------------------------------------
FD3          4                                                          Gray Fine to Medium SAND, trace course sand, little silt
- ------------------------------------------------------------------------------------------------------------------------------------
FD4          2          49         25            24                     Gray lean CLAY and SILT
- ------------------------------------------------------------------------------------------------------------------------------------
FD5          1B         49         26            23           2.80      Gray lean CLAY, trace fine to medium sand
- ------------------------------------------------------------------------------------------------------------------------------------
FD6          1A                                                         Dark gray lean silty CLAY, little fine to medium sand, trace
                                                                         coarse sand and fine gravel 
- ------------------------------------------------------------------------------------------------------------------------------------
FD6          2                                                          Gray lean CLAY, little fine to medium sand, trace coarse 
                                                                         sand and fine gravel
- ------------------------------------------------------------------------------------------------------------------------------------
FD7          2                                                          Brown medium to fine SAND, some coarse sand and fine to 
                                                                         coarse gravel, little silt
- ------------------------------------------------------------------------------------------------------------------------------------
FD7          3                                                2.79      Light gray SILT and fine SAND, some medium to coarse sand, 
                                                                         little gravel, trace clay
- ------------------------------------------------------------------------------------------------------------------------------------
FD8          1                                                          Gray fine SAND, some silt, trace medium and coarse sand, 
                                                                         trace fine gravel 
- ------------------------------------------------------------------------------------------------------------------------------------
FD8          2                                                          Light gray fine to medium SAND, some course sand and fine 
                                                                         gravel, some silt
- ------------------------------------------------------------------------------------------------------------------------------------
FD9          2                                                          Light gray fine to medium SAND, some course sand and fine 
                                                                         to coarse gravel, little silt
- ------------------------------------------------------------------------------------------------------------------------------------
FD10         2                                                2.83      Blue gray SILT, and fine sand, some medium to coarse sand, 
                                                                         some fine to coarse gravel
- ------------------------------------------------------------------------------------------------------------------------------------
FD12         1B         42         21            21                     Gray lean SILT and CLAY
- ------------------------------------------------------------------------------------------------------------------------------------
FD12         2                                                          Gray fine to medium SAND, some silt, some coarse to medium 
                                                                         sand, some fine gravel
- ------------------------------------------------------------------------------------------------------------------------------------
FD13         1B         51         25            26           2.80      Gray ???^ CLAY
- ------------------------------------------------------------------------------------------------------------------------------------
FD14         2                                                          Brown SILT and fine SAND, some coarse to medium sand, little
                                                                         fine gravel 
- ------------------------------------------------------------------------------------------------------------------------------------
FD14         3                                                2.76      Brown medium to fine SAND, some silt, little gravel
====================================================================================================================================
</TABLE> 

     Borings FD1 to FD3 are in the Boston Army Base vicinity.

     Borings FD4 to FD6 are in the Notch.

     Borings FD7 to FD9 are in the Inner Confluence.

     Borings FD10 to FD13 are in the Mystic River.

     Borings FD14 is in the Chelsea River.

                                                                   Project 93317
                                                                     October 22,

<PAGE>
 
                      GRAIN SIZE DISTRIBUTION TEST REPORT

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                     GRAIN SIZE DISTRIBUTION TEST REPORT 

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                      GRAIN SIZE DISTRIBUTION TEST REPORT

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                     GRAIN SIZE DISTRIBUTION TEST REPORT 

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                     GRAIN SIZE DISTRIBUTION TEST REPORT 

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                     GRAIN SIZE DISTRIBUTION TEST REPORT 

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                     GRAIN SIZE DISTRIBUTION TEST REPORT 

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                     GRAIN SIZE DISTRIBUTION TEST REPORT 

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                     GRAIN SIZE DISTRIBUTION TEST REPORT 

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<PAGE>
 

                      GRAIN SIZE DISTRIBUTION TEST REPORT

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<PAGE>
 
                      GRAIN SIZE DISTRIBUTION TEST REPORT

                             [GRAPH APPEARS HERE]

<PAGE>
 


                      GRAIN SIZE DISTRIBUTION TEST REPORT

                             [GRAPH APPEARS HERE]
<PAGE>
 

                     GRAIN SIZE DISTRIBUTION TEST REPORT 

                             [GRAPH APPEARS HERE]













<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                           SECTION TABLE OF CONTENTS

                            DIVISION 02 - SITE WORK

                                 SECTION 02491

                       UNDERWATER DRILLING AND BLASTING

PART 1   GENERAL

     1.1   REFERENCES 
     1.2   RELATED WORK SPECIFIED ELSEWHERE
     1.3   DEFINITIONS
       1.3.1   Soft Material           
       1.3.2   Hard Material             
       1.3.3   Rock Material                           
     1.4   PERFORMANCE REQUIREMENTS
       1.4.1   Responsibilities
         1.4.1.1    General
       1.4.2   Coordination
         1.4.2.1    Schedules
         1.4.2.2    Permits
         1.4.2.3    Fisheries Observer
       1.4.3   Work Restrictions
         1.4.3.1    Protection of Finfish and Marine Mammals
         1.4.3.2    Reserved Channel Blasting Operations
         1.4.3.3    Other Restrictions
     1.5   SUBMITTALS
     1.6   QUALITY CONTROL
       1.6.1   Qualifications
       1.6.2   Blasting Safety Plan 
     1.7   LIGHTNING PROTECTION
     1.8   RECORDKEEPING  
       1.8.1   Daily Explosive Material Summary
       1.8.2   Report of Loss
       1.8.3   Licenses
       1.8.4   Daily Blasting Log
     1.9   DELIVERY, STORAGE, AND HANDLING
       1.9.1   Safety
     1.10  PROJECT/SITE CONDITIONS
       1.10.1  EXISTING CONDITIONS

PART 2   PRODUCTS - NOT USED


PART 3   EXECUTION

     3.1   EXAMINATION
       3.1.1   Preblast Survey
     3.2   PREPARATION
       3.2.1   Test Blast Program
     3.3   BLASTING METHODS AND PROCEDURES
       3.3.1   General
       3.3.2   Blasting Control  
         3.3.2.1    Submittals
         3.3.2.2    Vibration Control
     3.4   DISPOSAL OF DREDGED ROCK MATERIAL

     -- End of section Table of Contents --

                    SECTION TABLE OF CONTENTS 02491 Page 1
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT



                                 SECTION 02491

                       UNDERWATER DRILLING AND BLASTING


PART 1    GENERAL

1.1      REFERENCES

  The publications listed below form a part of this specification to the extent 
  referenced. The publications are referred to in the text by basic designation 
  only.

          ENGINEERING MANUALS (EM)

  EM 385-1-1                  (1996) U.S. Army Corps of Engineers,
                              Safety and Health Requirements Manual

1.2      RELATED WORK SPECIFIED ELSEWHERE

  a.     Requirements relative to water quality monitoring and testing including
  Data are specified in Section 01135 WATER QUALITY MONITORING AND CONTROL.

  b.     Additional requirements relative to water quality monitoring and
  testing, including protection of finfish and marine mammals, are specified in
  Section 01130 ENVIRONMENTAL PROTECTION.

  c.     Measurement and payment for rock material removal and disposal is 
  specified Section 01025 MEASUREMENT AND PAYMENT.

  d.     See also EM 385-1-1 U.S. Army Corps of Engineers, Safety and Health 
  Requirements Manual, Section 29 for additional requirements relative to 
  blasting.

1.3      DEFINITIONS

1.3.1    Soft Material

  "Soft" or maintenance material is defined in Section 02482 DREDGING.

1.3.2    Hard Material

  "Hard material" is defined in Section 02482 DREDGING.

1.3.3    Rock Material

  "Rock material" must be of such composition as, in the opinion of the
  Contracting Officer, requires blasting or the use of special plant for its
  removal. All other materials including wrecks, snags, stumps, piles, fragments
  of rock, and boulders, capable of being removed by the dredge in one piece
  will be classified and paid for under other items of work, as applicable. Rock
  material shall be removed and disposed as specified in this section, and as
  indicated on contract drawings.

1.4      PERFORMANCE REQUIREMENTS

1.4.1    Responsibilities

1.4.1.1  General

  The Contractor's blasting program and methods shall be those necessary to
  accomplish the excavation shown on the contract drawings in accordance with
  the procedures specified in this section. The Contractor will be required to
  make necessary plans, examinations, surveys, and test blasts to

                             SECTION 02491  Page 1

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

     determine the quantity of explosives that can be fired without injuries to
     persons, and fish and wildlife, or damage to personal or public property.

1.4.2     Coordination

1.4.2.1   Schedules

     The Contractor shall thoroughly coordinate his schedules for blasting with
     the proper authorities, Federal, State, and local. No blasting will be done
     unless the Contractor is notified by all concerned parties that he may
     blast.

1.4.2.2   Permits

     The Contractor will be required to obtain all necessary permits from the
     local authorities to perform blasting operations. The Contracting Officer
     shall be notified in writing that all permits have been obtained.

1.4.2.3   Fisheries Observer

     The Contractor shall provide the services of an approved fisheries observer
     to monitor fish passage and report on any possible fish kills from the
     blasting operations. The Contractor shall cooperate with the observer in
     his observations and recommendations. The Contractor, in cooperation with
     the fisheries observer, shall also avoid impacts to marine mammals during
     blasting operations See Section 01130 ENVIRONMENTAL PROTECTION for
     Fisheries Observer qualifications and approval action requirements.

1.4.3     Work Restrictions

1.4.3.1   Protection of Finfish and Marine Mammals

     No blasting shall be performed in the Mystic River and the Inner Confluence
     from February 15 to June 15 of any year to protect winter flounder spawning
     and anadromous fish. Blasting shall also comply with the following
     restrictions:

          a.   No blasting will be permitted during periods of dead slack water 
          consistent with safety requirements.

          b.   All blasting operations are contingent upon using sonar, and with
          a Fisheries Observer present. Significant schools of fish may appear
          in the area at any time of year. In the event that a fish school is
          detected during these fish passage periods, the Contractor shall
          temporarily stop blasting operations when so advised by the Fisheries
          Observer.

          c.   A fish startle system shall be used if blasting occurs in the 
          Reserved Channel during anadromous fish runs between February 15 and
          June 15. See Section 01130 ENVIRONMENTAL PROTECTION for fish startle
          system and, sonar equipment requirements.

          d.   To reduce fish mortality, all blasting shall be conducted using
          inserted delays of a fraction of a second per hole and stemming shall
          be rock or similar material placed into the top of the borehole to
          deaden the shock wave reaching the water column.

          e.   The Fisheries Observer and the Contractor shall also maintain 
          observations for marine mammals in the area and avoid blasting while
          the animals are in visible range.

1.4.3.2   Reserved Channel Blasting Operations

     Blasting operations in the Reserved Channel and in the nearby portion of
     the Main Ship Channel will be permitted during any time of the year.

                             SECTION 02491 Page 2
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  However, the other requirements stated above for the protection of finfish 
  and marine mammals will apply.

1.4.3.3   Other Restrictions

  Blasting will not be permitted on Sundays or on State or Federal Legal 
  Holidays, unless approved in advance in writing by the Contracting Officer.

1.5  SUBMITTALS
     
  Government approval is required for submittals with a "GA" designation;
  submittals having an "FIO" designation are for information or for acceptance
  only. The following shall be submitted in accordance with Section 01300
  SUBMITTAL PROCEDURES.

     SD-08, Statements

  Blasting Safety Plan; FIO, E Reviewer.

  Prior to blasting, submit a plan for protection of surrounding structures, 
  equipment, vessels and the environment. Acceptance of the plan by the
  Contracting Officer will not relieve the Contractor of the responsibility for
  producing safe and satisfactory results.

     SD-01, Data

  Licenses; FIO, C Reviewer.

  Prior to blasting, submit a list of blasting license holders and their 
  responsibilities for this project.

     SD-18, Records

  Daily Blasting Log; FIO, C Reviewer.

  Submit the required daily blasting log of operations on a weekly basis.

     SD-09, Reports

  Preblast Survey; FIO, E Reviewer.

  Prior to blasting, submit a preblast structural survey of existing structures.

     SD-09, Reports
 
  Test Blast Program; FIO, E Reviewer.

  After test blasting, submit the results of the test blast program. Acceptance
  of the plan by the Contracting Officer will not relieve the Contractor of the
  responsibility for producing safe and satisfactory results.

1.6  QUALITY CONTROL

1.6.1     Qualifications

  The Contractor shall employ a specialist qualified in vibration control
  methods and who is capable of analyzing results obtained from seismograph
  readings. A minimum of 30 days prior to commencement of blasting operations,
  the Contractor shall provide the Contracting Officer with the written
  qualifications of the seismic specialist to include but not be limited to past
  experience, training, and education. The acceptability of the specialist is
  subject to the approval of the Contracting Officer. The Contractor shall
  provide a minimum of three seismographs to measure and

                             SECTION 02491 Page 3
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

  vibrations of nearby structures caused by each blast detonated under the
  contract. Seismograph operators shall be qualified personnel capable of
  setting up instruments at designated locations and efficiently recording the
  blast.

1.6.2     Blasting Safety Plan

  No later than 30 days after receipt of Notice to Proceed, the Contractor shall
  submit a Blasting Plan for review and acceptance. If the plan is not
  acceptable, the Contractor shall revise and resubmit the plan. The Contracting
  Officer will require seven days for review and acceptance of the revised plan.

  The Contractor shall also submit a weekly blasting operation schedule to the
  Contracting Officer to facilitate the Corps' monitoring of the effects of
  blasting operations on the fishery resource; include also the Fisheries
  (marine mammal) Observer report. This schedule shall be provided by Wednesday
  of the week before the blasting is to occur. The schedule shall include, as a
  minimum, the days when blasting will occur and the areas to be blasted.

  No blasting shall be started until after the Blasting Safety Plan has been 
  reviewed and accepted by the Contracting Officer.

  In addition to the requirements of EM 385-1-1, Section 29, the Contractor's 
  Blasting Plan shall include, as a minimum, the following items:
     
     (1)  Proposed method of transportation, storage, and handling of 
  explosives.

     (2)  Procedure for monitoring the blast operations and handling misfires.

     (3)  Location, size, depth, and spacing of blast holes, type of explosive 
  and method of loading and detonating, and maximum number of holes to be 
  detonated per blast. Type of blasting machine to be used and when last tested.

     (4)  Type of instrumentation to be used, manufacturer, and when last 
  calibrated and/or certified.

     (5)  List of licenses, permits, and/or clearances required, when applied 
  for, and date of approval or anticipated approval by Federal, State, and local
  concerns.

     (6)  A format for maintaining a record of individual blasts (i.e. the 
  "Daily Blasting Log") throughout the life of the project designed to record 
  pertinent data before, during, and after the blasting operation. Pertinent 
  information shall include, but not be limited to, those items specified in 
  paragraph "Daily Blasting Log".

     (7)  Names and qualifications of specialists for vibration control analysis
  and airblast over-pressure measurements, see paragraph "Qualifications". Names
  and addresses of all certified blasters and users.

     (8)  Plan showing location of warning signs and signals to be used Method 
  of controlling vessel traffic and communications.

     (9)  Name and address of Contractor's representative to which any claims 
  for damage due to blasting should be addressed.

     (10) A test plan which encompasses the requirements of the Test Blast 
  Program specified below. This plan shall also include the planned test
  patterns and weights of explosives of each test blast with the anticipated and
  the allowed peak particle velocities and peak positive airblast pressures at
  structures most likely to receive damage from the test blast.

                             SECTION 02491 Page 4
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

     (11) The plan shall be signed off by the Contractor's "Contractor Quality
  Control System Manager."

1.7  LIGHTNING PROTECTION

  The Contractor shall furnish, maintain, and operate lightning-detection
  equipment during the entire period of blasting operations and/or during the
  periods that explosives are stored at the site. The equipment shall be similar
  and equal to the Litton TSM/C Thunderstorm Monitor and Lightning Warning
  Instrument, as manufactured by Litton Industries, Inc., Environmental Systems
  Division, Camarillo, California. The equipment shall be installed in
  accordance with the manufacturer's written instructions. When the lightning-
  detection device indicates a blasting hazard potential. Personnel shall be
  evacuated from all areas where explosives are present. The lightning
  protection equipment shall be identified in the Blasting Plan.

1.8  RECORDKEEPING

1.8.1.    Daily Explosive Material Summary

  The Contractor shall keep a daily record of transactions, to be maintained at
  each storage magazine. The inventory records shall be updated at the close of
  business each day. Records shall show class and quantities received and
  issued, and total remaining on hand at the end of each day. The remaining
  stock shall be checked each day, and any discrepancies that would indicate a
  theft or loss of explosive material shall be reported immediately.

1.8.2 Report of Loss

  Should a loss or theft of explosives occur, all circumstances and details of
  the loss/theft will be immediately reported to he nearest office of the
  Bureau of Alcohol, Tobacco and Firearms (ATF), as well as to the local law 
  enforcement authorities and the Contracting Officer's Representative.

1.8.3     Licenses

  The Contractor shall provide the Contacting Officer with a list of
  Contractor's blasting license holders, and only these personnel shall be
  permitted to handle explosives and conduct blasting operations.

1.8.4     Daily Blasting Log

  The Contractor shall provide the Contacting Officer, on a weekly basis, a
  daily log of blasting operations. The log shall be updated at close of
  business each day. The log shall include the number of blasts; time and date
  of blast; the blast locations and patterns; pounds of explosive used per hole;
  average water and substrate depth; millisecond delays used; the drill tip
  elevation at the top of bedrock for each hole drilled as recorded by the
  Contractor under the direction of the Contracting Officer's representative;
  and the occurrence of any fish kills.

1.9       DELIVERY, STORAGE, AND HANDLING

1.9.1     Safety

  The Contractor shall take all reasonable precautions for the protection of
  individuals and property exposed to his operations. Such precautions shall
  include, but are not limited to:

     (1) The amount of explosives permitted aboard the plant at one time will be
  subject to the approval of the Contacting Officer, but in no case shall amount
  exceed that required by the Contractor for one day's operations.
  
                             SECTION 02491 Page 5
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT
 
     (2)  Provision shall be made for jettisoning explosives in emergencies. It 
  shall be the Contractor's responsibility for retrieving the same after the 
  emergency is over.

     (3)  The Contractor shall take all necessary precautions to prevent damage
  to any vessel (moored or underway), structures or property, and preserve the
  crew or occupants thereof from exposure to injury as a result of his
  operations.

     (4)  In order to prevent flyrock damage, blasting mats shall be employed 
  unless four or more feet of water overlies the rock surface.

     (5)  The Contractor shall look out for and take all precautions necessary 
  to warn and/or protect swimmers, divers, or other individuals in the water 
  exposed to his operations prior to blasting.

     (6)  Transport of explosives and detonators shall be in vehicles suitably
  grounded and protected from lightning strikes and electrical storm phenomena,
  in accordance with Federal and State requirements.

     (7)  No explosive material shall be handled, transported, or in any way 
  made use of during any period of electrical storms, of lightning, or other
  electrical phenomenon. In the event that any such condition should appear
  imminent or occur, or if some known leakage of electricity should occur in the
  neighborhood of or in the work area, while the transport, handling, making up,
  charging, or such like use of explosives is being effected, then the work area
  shall be evacuated and abandoned completely until at least 30 minutes after
  the condition has ceased or the leakage stopped. The Contracting Officer shall
  be notified prior to any blasting or loading operation so that stationary or
  mobile radio transmissions are not made on the site.

     (8)  The handling, storage, and use of explosives shall be governed by the
  applicable provisions of the section on "Blasting" of the Corps of Engineers
  Manual EM 385-1-1, dated September 1996, entitled, "Safety and Health
  Requirements Manual." In addition, the Contractor shall make necessary
  arrangements as may be required by the applicable U.S. Coast Guard, State,
  County, Municipal, or Port Authority codes, rules, regulations, and laws, and
  shall be responsible for compliance therewith, including storage of
  explosives.

  All handling, use, and storage of explosives will be under the personal 
  supervision of a Licensed Blaster.

  No blasting is permitted when visibility is less than 1,500 feet in fog or
  rain, and between beginning of evening nautical twilight, and ending of
  morning nautical twilight.

1.10      PROJECT/SITE CONDITIONS

1.10.1    EXISTING CONDITIONS

  The rock to be excavated is from the geologic formation locally known as the
  Cambridge slate in early literature and as argillite in later references.
  Argillite is used as the classification for this project. The bedrock map of
  the area by the United States Geological Survey describes the argillite as
  gray, laminated to massively bedded with poorly developed bedding-plane
  partings, having locally imperfect slaty cleavage, and with minor inter bedded
  sandstone and (or) quartzite.

  Bedrock was encountered by several borings in the Mystic River Channel and in
  the Boston Army base vicinity as described on the graphic logs shown on the
  drawings. The bedrock surface is expected to be irregular and its actual
  occurrence within dredge depth is unknown.


                             SECTION 02491 Page 6
<PAGE>
 
BOSTON HARBOUR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

  Contractors are expected to examine the site of the work, cores and logs, and,
  after investigation, decide for themselves, the character of materials and
  make their bids accordingly. The Government assumes no responsibility for the
  types of material encountered, nor does it guarantee that other materials will
  not be encountered in performance of the work. The removal cost of such other
  materials shall be included in the Bid Prices. Other subsurface data are
  referenced in Section 02482 Dredging.

PART 2  PRODUCTS - NOT USED

PART 3  EXECUTION

3.1  EXAMINATION

3.1.1 Preblast Survey

  The Contractor shall provide one qualified person from his organization and
  his specialist on vibration control to work as a team with a representative of
  the Contracting Officer in making a preblast structural survey. A
  representative sample of structures (approximately 20 percent), as determined
  by the Contractor, that could receive seismic motion greater than 0.5 inch per
  second or airblast over pressure greater than 0.01 psi, shall be inspected and
  their condition documented. The Contractor may perform additional preblast
  surveys of additional structures, at his option and at no additional expense
  to the Government. All existing outstanding structural defects such as broken
  windows shall be photographically documented. Video photography may be
  utilized in addition to still photographs to augment particularly large areas
  of poor condition, but shall not be used in lieu of the written reporting
  procedure. Each structure shall be documented as to its construction,
  foundation type, condition, and closest distance to rock removal locations.
  The preblast survey inspection methods will be subject to the approval of the
  Contracting Officer. The Contractor shall prepare a preblast survey report and
  submit the report to the Contracting Officer. All necessary rights of entry to
  properties subject to a preblast survey shall be obtained by the Contractor.
  Owners of all properties that could receive seismic motion greater than 0.5
  inch per second or airblast over pressure greater than 0.01 psi shall be
  notified prior to the commencement of blasting.

3.2  PREPARATION

3.2.1  Test Blast Program

  A test blast program shall be conducted by the Contractor, consisting of a
  minimum of three test blasts in each area of rock excavation. The purpose of
  the test program is to allow the Contractor to establish the desired effects
  for excavation, the safe limits of vibration and airblast over-pressure. The
  test blast program shall be conducted and reported in strict accordance with
  procedures outlined in these specifications covering blasting methods and
  vibration control.

  No test blasting shall be started until after the location for the individual
  test blasts has been reviewed and approved by the Contracting Officer.

  Test blasting in the Mystic River and Inner Confluence, if necessary, will be
  permitted only between June 16 of one year through February 14, inclusive, of
  the next year.

  The test event shall begin with a small number of charges and extend upward to
  the maximum yield to be used. The final test event shall simulate as close as
  practicable the explosive charge type, size, overlying water depth, charge
  configuration, charge separation, initiation methods, and emplacement
  conditions anticipated for the largest detonations. Upon any

                             SECTION 02491 Page 7
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

  evidence of any damage to preblast survey structures, test blasting shall
  cease until the Contracting Officer has been notified and adjustments made.
  One copy of the record for the test blasts shall be submitted in tabular form
  to the Contracting Officer.

  After the series of test blasts, the Contractor shall examine the
  representative structures of the preblast survey as previously specified. All
  new damage resulting from the test blasting shall be reported in detail to the
  Contracting Officer, including photographs.

  At the conclusion of the test blast program, the Contractor shall examine all
  reports, surveys, test data, and other pertinent information: the conclusions
  reached shall be the basis for developing a completely engineered procedure
  for blasting. The procedures shall include sketches showing blasting patterns,
  weights and explosives, wiring, and charge emplacement. The developed
  procedure shall be submitted for review to the Contracting Officer, and upon
  completion of the review and acceptance, it shall be appended to and become a
  part of the blasting plan. A period of seven days will be required for review
  and acceptance by the Contracting Officer of the proposed procedure. Such
  review period shall not be the basis for a claim against the Government for
  delay. In no event shall operational blasting proceed until the developed
  procedure for blasting has been reviewed and accepted by the Contracting
  Officer. If the procedure is not acceptable, the Contractor shall revise and
  resubmit the procedure. The Contracting Officer will require five days for
  review and acceptance of the revised procedure.

3.3  BLASTING METHODS AND PROCEDURES

3.3.1  General

  The Contractor shall take appropriate measures for controlling blast damage 
  which shall include but are not limited to:

     a.   Choosing a suitable ignition pattern with millisecond delay detonators
     to minimize the instantaneous impulse.

     b.   Using lower charges in the first detonating delay than those in
     subsequent delays.

     c.   Taking precautions to avoid flashover, which shall include the
     following measures unless otherwise allowed by the Contracting Officer:

          (1)  Keeping the top of the hole uncharged for a depth equal to at
          least one-half the burden width.

          (2)  Using low sensitivity explosives in the entire pattern or loading
          the holes alternatively with high and low sensitivity explosives.

          (3)  Inspecting the ignition system using ground fault testing.

     d.   One person shall be charged with overall development of pattern
     design, loading and connection the explosives and may supervise
     subordinates, who also shall have blasting credentials to accomplish the
     same duties.

     e.  Proper lighting plant shall fully illuminate the drilling and loading
     barge(s) when work is being conducted without full daylight. Drilling
     shall be vertical with a hole diameter of 6-inches or smaller. Blast holes
     shall be accurately positioned a Differential Global Positioning System
     (DGPS) and recorded with electronic drill monitoring.

     f.  The Contractor shall determine a safe means to drill, load and connect
     the firing lines to the submerged borings. The vertical

                             SECTION 02491 Page 8

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT
 
     loading casing shall be seated into rock and accurately positioned be
     modern survey procedures.

3.3.2     Blasting Control

3.3.2.1   Submittals 

  On a semi-monthly basis, the Contractor shall submit in tabular form a record
  for each blast which shall consist of positively identified, date and time and
  location of blast, amount of explosives used, peak particle velocity, and all
  other data necessary to adequately control blasting operations. A memorandum
  or telephone report on vibration intensity shall be submitted within 24 hours
  when specifically requested by the Contracting Officer or without request when
  such intensity exceeds a peak particle velocity of 1.5 inches per second.

3.3.2.2   Vibration Control

  The vibration specialist shall adopt appropriate measures for blast damage
  reduction and shall be fully involved in a design of the test blasting and
  monitoring program and the final production blasting and monitoring program.
  As a minimum, seismic monitoring equipment shall be placed on the tower and
  another lower location on or in the Tobin Bridge for monitoring blasting in
  the Mystic River, and at the Conley Terminal and Boston Army Base for
  monitoring blasting in the Reserved Channel. Other monitoring stations shall
  be set up as necessary to gain reliable data on blast effects to structures
  deemed sensitive by the vibration specialist, Contractor, or Contracting
  Officer. Fourteen days shall be allowed for the Contracting Officer to review
  and accept the final blasting plan. The vibration specialist shall be retained
  throughout the operational program to provide and vertify round-by-round
  blasting records.

  Millisecond delay caps shall be used on all blasting work.

  Blasting shall be controlled in such a manner that the maximum ground
  vibration level at any structure which is vulnerable to damage shall not
  exceed a zero-to-peak particle velocity of 1.0 inches per second nor an
  energy ratio of 1.0. The instrumentation shall record all three orthoganal
  components (vertical, radial, and transverse with respect to the location of
  the blast) of particle velocity direct (or shall have sufficient resolution of
  acceleration or displacement such that particle velocity can be readily and
  accurately determined from the records). The instantaneous vector sum of the
  three directional components of vibration will be used to compute the maximum
  vibration level.

3.4  DISPOSAL OF DREDGED ROCK MATERIAL

  Rock material shall be placed in dump scows and transported to the
  Massachusetts Bay Disposal Site and disposed at a taut wire buoy. The location
  of the Mass Bay Disposal Site is shown on the drawing attached at the end of
  Section 02482 DREDGING. The National Marine Fisheries Service (NMFS) has
  placed specific conditions governing the use of the Massachusetts Bay Disposal
  Site: See Section 01130 ENVIROMENTAL PROTECTION for information on the NMFS
  conditions governing the use of the Massachusetts Bay Disposal Site.

     -- End of Section --
                             SECTION 02491 Page 9
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                           SECTION TABLE OF CONTENTS

                            DIVISION 02 - SITE WORK

                                 SECTION 02492

                            UNDERWATER DIVING WORK

PART 1     GENERAL

 1.1      SUMMARY
   1.1.1     Location of Diving Operations
   1.1.2     Underwater Work
   1.1.3     Time of Year and Weather
   1.1.4     Depths of Diving Operations and Visibility
   1.1.5     Types of Diving Operations
   1.1.6     Potential Diving Tasks
   1.1.7     Measurement and Payment

 1.2      REFERENCES
 1.3      SUBMITTALS
   1.3.1     Accepted Submittals
   1.3.2     Unaccepted Submittals
   1.3.3     Submittal Procedure
     1.3.3.1    Procedures
     1.3.3.2    Diving Coordinator Review
     1.3.3.3    Information on Submittal Status
     1.3.3.4    Deviations   
   1.3.4     Government Accepted Submittals 
   1.3.5     Information Only Submittals
   1.3.6     Submittal Items
     1.3.6.1    Contractor Safe Practices Manual
   1.3.7     Medical Requirements; GA: See Revisions to COE EM 385-1-1,
       Section 30, Paragraph 30.A.12.
     1.3.7.1    Site Specific Diving Operational Plans
  1.4     REGULATORY REQUIREMENTS
    1.4.1    Policy
  1.5     PRE-DIVE CONFERENCE (See COE EM 385-1-1, Section 30, Paragraph
          30.A.14 and 30.A.15)
  1.6     MANNING LEVELS FOR DIVE TEAMS (See COE EM 385-1-1, dated 3 Sep 96,
          Appendix N)

PART 2    PRODUCTS (Diving Equipment)

  2.1     EQUIPMENT REQUIREMENTS (See COE EM 385-1-1, Section 30, dated 3 Sep
          96.

PART 3    EXECUTION

  3.1     SURFACE SUPPLIED AIR OPERATIONS (See COE EM 385-1-1, Section 30, 
          Paragraph 30C)
  3.2     MIXED GAS DIVING OPERATIONS

- -- End of Section Table of Contents --

                   SECTION TABLE OF CONTENTS 02492 Page 1  
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

                                 SECTION 02492

                            UNDERWATER DIVING WORK

PART 1    GENERAL

1.1  SUMMARY 

1.1.1     Location of Diving Operations

  The location of services to be performed under this contract include Boston 
  Harbor Channels and Berth areas.

1.1.2     Underwater Work

  Provide diving services and equipment as necessary to perform the work of this
  contract.

1.1.3     Time of Year and Weather

  Diving operations may be conducted year round and in all weather conditions.

1.1.4     Depths of Diving Operations and Visibility 

  Depths of diving operations may range from 10 to 80 feet, and may include both
  clear and limited visibility conditions.

1.1.5     Types of Diving Operations

  The surface supplied air mode of diving shall be used for all underwater work.

1.1.6     Potential Diving Tasks

  A partial list of potential underwater tasks that may be necessary due to the 
  work performed under this contract are as follows:

     a.    Underwater investigations and inspections may be necessary in support
     of underwater drilling and blasting operations.

     b.    Services may include conducting underwater surveys to see what is on 
     the channel or berth area bottom prior to dredging.

     c.    The Contractor may utilize underwater investigations and surveys as a
     part of his disposal cell coverage and thickness verification methodology.

     d.    Diving operations may be necessary for the attachment of rigging 
     equipment for removal of debris and obstructions.

     e.    Diving operations may be necessary for locating and marking 
     underwater utilities with buoys to reduce the risk of damage due to the
     dredging operation.

     f.    Diving operations may be necessary for assisting in retrieving dredge
     equipment lost in the water during the dredging operation.

     g.    Diving operations may be necessary for performing scientific 
     observations and sampling in support of water quality monitoring and
     control.
     
     h.    The Contractor may utilize underwater surveys to verify complete 
     removal of the MWRA "Old Section 38" water tunnel.

                             SECTION 02492 Page 1

<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

1.1.7     Measurement and Payment

     No separate measurement or payment will be made for the work of this 
     section. All costs associated with underwater diving work shall be included
     in the unit and lump sum Bidding Schedule payment items most closely 
     associated with the work involved.

1.2       REFERENCES

     The publications listed below form a part this specification to the extent
     referenced. The publications are referred to in the text by basic 
     designation only.

               CORPS OF ENGINEERS (COE)

     COE EM 385-1-1     
                                      (1996) Safety & Health Requirements Manual

1.3       SUBMITTALS

     The items listed in subpart "Submittal Items" below shall be submitted to 
     the Contracting Officer for review and acceptance by the New England
     District Safety Officer and the USACE Diving Coordinator (UDC).

1.3.1     Accepted Submittals

     The acceptance of submittals by the Contracting Officer shall not be 
     construed as a complete check, but will indicate only that the submittal
     generally complies with regulatory requirements. Acceptance will not 
     relieve the Contractor of the responsibility for compliance with COE EM
     385-1-1, Section 30. After submittals have been accepted by the Contracting
     Officer or his designated representative, no resubmittal will be given
     consideration unless accompanied by an explanation as to why changes are 
     necessary.

1.3.2     Unaccepted Submittals

     The Contractor shall make all corrections required by the Contracting
     Officer and promptly furnish a corrected submittal in the form and number
     of copies as specified for the initial submittal. If the Contractor
     considers any correction indicated on the submittals to constitute a change
     to the contract, notice shall be given promptly to the Contracting Officer.

1.3.3     Submittal Procedure

     Submittals shall be made as follows:

1.3.3.1   Procedures

     Submit six (6) copies of each submittal item to the USACE Diving 
     Coordinator. For emergency work, FAX or hand carry one copy of each 
                      --------------
     submittal. In extreme emergencies, review actions may take place at the 
     dive site, just prior to the dive operation.

1.3.3.2   Diving Coordinator Review

     Review action on all submittals is by the New England District Diving 
     Coordinator (UDC), Mr. George Norton, Telephone Number (978) 318-8870.

1.3.3.3   Information on Submittal Status

     All Contractor requests for current status of submittal reviews shall be 
     made through the Project Resident Engineer.

                             SECTION 02492 Page 2
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVMENT AND BERTH DREDGING PROJECT

1.3.3.4   Deviations

     For submittals which include proposed deviations requested by the 
     Contractor, the Contractor shall set forth in writing the reason for the 
     deviations and annotate such deviations on the submittal. The Government
     reserves the right to rescind inadvertent approval of submittals containing
     unnoted deviations.

1.3.4     Government Accepted Submittals

     Upon completion of review of submittals requiring Government acceptance,
     the submittals will be identified as having received acceptance by being so
     noted and dated. Four copies of the submittal will be retained by the 
     Contracting Officer and copies of the submittal will be returned to the 
     Contractor.

1.3.5     Information Only Submittals

     Normally submittals for information only will not be returned. Acceptance
     of the Contracting Officer is not required on information only submittals.
     These submittals will be used for information purposes. The Government
     reserves the right to require the Contractor to resubmit any item found not
     to comply with the contract. This does not relieve the Contract or from the
     obligation to comply with these specifications and will not prevent the
     Contracting Officer from requiring contract compliance.

1.3.6     Submittal Items

     The Contractor shall submit all items listed below. The Contracting Officer
     may request submittals in addition to those listed when deemed necessary to
     adequately describe the work covered in the particular work order. Each
     submittal shall be complete and in sufficient detail to allow ready 
     determination of compliance with contract requirements. Prior to submittal,
     all items shall be checked and approved by the Contractor's Quality Control
     (CQC) representative and shall be stamped, signed, and the contract 
     requirements. Proposed deviations from the contract requirements shall be
     clearly identified.

1.3.6.1   Contractor Safe Practices Manual

     The Contractor shall develop and maintain a safe practices manual. The safe
     practices manual shall contain all of the information required by 29 CFR
     1910.420 and the additional information as specified below. This manual
     shall encompass the Contractor's entire diving program and be available at
     all times at the dive location to each dive team member and the Government
     representative. The safe practices manual shall include the items listed in
     paragraph 30.A.11 of COE EM 385-1-1, Section 30, and verification of dive
     team qualifications and experience. Verification of dive team 
     qualifications and experience includes divers, diving supervisor, and
     tenders. Evidence that each dive team member has current certification in 
     cardiopulmonary resuscitation (CPR) and first aid shall be submitted. A
     lack of experience or qualifications to perform the tasks stated in the 
     dive plan will be cause for rejection or cessation of operations.

1.3.7     Medical Requirements; GA; See Revisions to COE EM 385-1-1, Section 30,
Paragraph 30.A.12.

1.3.7.1   Site Specific Diving Operational Plans

     A site specific diving operations plan shall be developed for each separate
     diving operation. This plan shall be submitted to the Contracting Officer 
     for review and acceptance by the New England District UDC, prior to 
     commencement of diving operations. The accepted plan shall be at the diving
     location at all times and be made available to the Government diving

                             SECTION 02492 Page 3
<PAGE>
 
BOSTON HARBOR NAVIGATION IMPROVEMENT AND BERTH DREDGING PROJECT

  inspector upon request. As a minimum, the plan shall contain the information 
  required by COE EM 385-1-1, Section 30, Paragraph 30.A.13.

1.4  REGULATORY REQUIREMENTS

  All diving operations performed under this contract shall comply with COE EM 
  385-1-1, Section 30, dated 3 Sep 96.

  The New England District may elect to implement and enforce more stringent
  diving requirements than stated in the above reference, but under no
  circumstances will the operational requirements to be less than specified in
  the reference.

1.4.1  Policy

  It is the policy of the Corps of Engineers that all contract diving operations
  be conducted in a prudent manner that will provide for maximum efficiency and
  minimize the potential for personal injury, loss of life, occupational illness
  and/or property damage. The Contractor shall not utilize drivers if the
  objective can be more safely and effectively accomplished by another means,
  e.g., using remote controlled television system in lieu of drivers.
  
  The Contractor shall demonstrate that each diver is:

     (1)  Medically fit to dive.

     (2)  Adequately trained and have the required proficiency for the work 
     assigned.

     (3)  Provided with and adheres to prescribed safe operating procedures.

     (4)  Trained with and required to use all equipment and/or tools to safely 
     perform the assigned tasks.

1.5  PRE-DIVE CONFERENCE (see COE EM 385-1-1, Section 30, Paragraph 30.A.14 and 
30.A.15)

1.6  MANNING LEVELS FOR DIVE TEAMS (see COE EM 385-1-1, dated 3 Sep 96, Appendix
N)

PART 2 PRODUCTS (Diving Equipment)

2.1  EQUIPMENT REQUIREMENTS (See COE EM 385-1-1, Section 30, dated 3 Sep 96. 

PART 3 EXECUTION

3.1  SURFACE SUPPLIED AIR OPERATIONS (See COE EM 385-1-1, Section 30, Paragraph 
30C)

3.2  MIXED GAS DIVING OPERATIONS

  Mixed gas diving operations will not be permitted for the work of this
  contract.

          -- End of Section --

                             SECTION 02492 Page 4
  


<PAGE>


                                                                   EXHIBIT 10.04


[LOGO]               [LETTERHEAD OF DEPARTMENT OF THE ARMY]

                                 May 12, 1998

Office of the Chief
Procurement Branch


Pier 400 Constructors
2122 York Road
Oak Brook, Illinois 60521

Gentlemen:

     You are hereby notified that your bid, in the total estimated amount of
$141,485,450.00, for Items Nos. 0001-0021, for Stage 2, Port of Los Angeles,
Pier 400 Deep Draft, Navigation Improvements Los Angeles and Long Beach Harbors,
San Pedro Bay, Los Angeles County, California, Invitation for Bid No. DACW09-97-
B-0009, is accepted and the award of Contract No. DACW09-97-C-0035 is made to
you. The Government reserves the right to award Option Items Nos. 0022A, 0022B
and 0023 at a later date.

     Payments are to be made from Appropriation No. 96X3122 CONST GEN COE CIVIL
S96041 BB012 12 300 A0000 (WN) in the amount of $7,900,000.00 and 96X8862
CONTRIBUTED FUNDS S96041 FW141 12 300 A0000 (WN) in the amount of $0. This is a
Continuing contract, reference Special Clauses, Section 00800, Paragraph 17 of
the Solicitation entitled "Continuing Contracts", EFARS 52.232-5002.

     You are not to proceed with the performance of work under the contract
until you are in receipt of a Notice to Proceed from me. You are required to
furnish satisfactory Performance and Payment Bonds within ten (10) days from the
date of this award, before you proceed with the work. Bonds should bear the
surety company's bond number.


                                   Sincerely,



                                   /s/ J. A. Eugino
                                   J. A. Eugino      
                                   Contracting Officer 

<PAGE>
 
<TABLE> 
<CAPTION> 
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                            <C>                      <C>                          <C>                  <C>      
                                               1. SOLICITATION NO.       2. TYPE OF SOLICITATION     3. DATE ISSUED       PAGE OF PA
SOLICITATION, OFFER,                              DACWO9-37-B-0009                                        03/18/97
     AND AWARD                                                              [x] SEALED BID (IFB)
(Construction, Alteration, or Repair)                                       [_] NEGOTIATED (RFP)
- ------------------------------------------------------------------------------------------------------------------------------------
IMPORTANT - The "offer" section on the reverse must be fully completed by offeror.
- ------------------------------------------------------------------------------------------------------------------------------------
4.  CONTRACT NO.                                5. REQUISITION/PURCHASE REQUEST NO.                         6. PROJECT NO.
     DACW09- 97-C-0035                                 WS1SYN- 7361-9506
- ------------------------------------------------------------------------------------------------------------------------------------
7.  ISSUED BY                 CODE                   SPLCTC06               8. ADDRESS OFFER TO         SPLCTC06

          LOS ANGELES DISTRICT, COE                                                            LOS ANGELES DISTRICT, COE
          CESPL-CT- P (S. OLIVER- HALL)                                                        CESPL-CT- P (S. OLIVER- HALL)
          P.O. BOX 522711                                                                      P.O. BOX 522711           
          LOS ANGELES, CA 90053-2325                                                           LOS ANGELES, CA 90053-2325 


- ------------------------------------------------------------------------------------------------------------------------------------
9.  FOR INFORMATION                      A. NAME                             B. TELEPHONE NO. (Include area code) (NO COLLECT CALLS)
      CALL                                   SANDY OLIVER-HALL   CO6                      (213) 452-3243
- ------------------------------------------------------------------------------------------------------------------------------------
                                                           SOLICITATION
- ------------------------------------------------------------------------------------------------------------------------------------
NOTE: In sealed bid solicitations "offer' and "offeror" mean "bid" and "bidder".
- ------------------------------------------------------------------------------------------------------------------------------------
10.  THE GOVERNMENT REQUIRES PERFORMANCE OF THE WORK DESCRIBED IN THESE DOCUMENTS (Title, identifying no data):

          Stage 2. Port of Los Angeles, Pier 400 Deep Draft, Navigation Improvements.
          Los Angeles and Long Beach Harbors, San Pedro Bay, Los Angeles County, 
          California

          The Estimated Cost of this Acquisition is over $10,000,000.00

          Any contract awarded under this solicitation will be made pursuant to PL
          100-656 "Small Business Competitiveness Demonstration Program."

          Bidders are advised that this project may be delayed, cancelled or revised
          at any time during the solicitation, selection and/or final award process.


- ------------------------------------------------------------------------------------------------------------------------------------
11.  The Contractor shall begin performance within  10  calendar days and complete it within  900  calendar days after receiving
                                                   ----                                      ----
[_] award           [x] notice to proceed. This performance period is   [x] mandatory.   [ ] negotiable. (See Section 00800.)
                                                                                                              -------------
- ------------------------------------------------------------------------------------------------------------------------------------
12A. THE CONTRACTOR MUST FURNISH ANY REQUIRED PERFORMANCE AND PAYMENT BONDS                128. CALENDAR DAYS
     If YES, "indicate within now many calendar days a after award item 128.)                    

[X] YES      [_] NO                                                                                      010
- ------------------------------------------------------------------------------------------------------------------------------------
13.  ADDITIONAL SOLICITATION REQUIREMENTS:

A.   Sealed offers in original and 0 copies to perform the work required are due at the place specified in Item 8 by  1.00 P.M.
                                  ---                                                                                ----------- 
     (hour) local time 4/29/97 (date). If this is a sealed bid solicitation, offers must be publicity opened at that time. Sealed
     envelopes containing offers shall be marked to show the offerer's name and address, the solicitation number, and the date and
     time offers are due.

B.   An offer guarantee [x] is.     [_] is not required.  SEE SECTION 00100, BID GUARANTEE FORM AND AMOUNT

C.   All offers are subject to the (1) work requirements, and (2) other provisions and clauses incorporated in the solicitation in 
     full text or by reference.

D.   Offers providing less than 60 calendar days for Government acceptance after the date offers are due will not be considered and 
     will be rejected.
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE> 
                                                      1442-101 
                            STANDARD FORM 1442 ? REV 4-1 
<PAGE>
 
                                        Contract No. DACW09-97-C-0035

                              SCHEDULE OF PAYMENT

<TABLE> 
<CAPTION> 
ITEM             DESCRIPTION                   QUANTITY        U/I     UNIT PRICE         AMOUNT            
- ----   ---------------------------------   -----------------   ---   --------------  -----------------      
<S>    <C>                                 <C>                 <C>   <C>             <C>       
0001   MOBILIZATION AND DEMOBILIZATION               1.00       JB     L.S.    .     $    6,400,000.00      
                                                                     --------------  -----------------      
0002   DREDGE ELEMENT 101                      207,000.00       CH            3.30          683,100.00      
                                                                     --------------  -----------------                            
0003   DREDGE ELEMENT 102                      267,000.00       CM            6.00        1,602,000.00                            
                                                                     --------------  -----------------                            
0004   DREDGE ELEMENT 103                      710,000.00       CM            3.70        2,627,000.00                            
                                                                     --------------  -----------------                            
0005   DREDGE ELEMENT 104                      500,000.00       CM            3.50        1,750,000.00                            
                                                                     --------------  -----------------                            
0006   DREDGE ELEMENT 105                    2,500,000.00       CM            4.75       11,875,000.00                            
                                                                     --------------  -----------------                            
0007   DREDGE ELEMENT 106                    2,073,000.00       CM            7.50       15,547,500.00                            
                                                                     --------------  -----------------                            
0008   DREDGE ELEMENT 107                      320,000.00       CM            3.00          960,000.00                            
                                                                     --------------  -----------------                            
0009   DREDGE ELEMENT 108                    1,653,000.00       CM            7.50       12,397,500.00                            
                                                                     --------------  -----------------                            
0010   DREDGE ELEMENT 109                    1,042,000.00       CM            2.80        2,917,600.00                            
                                                                     --------------  -----------------                            
0011   DREDGE ELEMENT 110                    1,800,000.00       CM            3.25        5,850,000.00                            
                                                                     --------------  -----------------                            
0012   DREDGE ELEMENT 111                    2,973,000.00       CM            3.10        9,216,300.00                            
                                                                     --------------  -----------------                            
0013   DREDGE ELEMENT 112                      770,000.00       CM            3.60        2,772,000.00                            
                                                                     --------------  -----------------                            
0014   DREDGE ELEMENT 113                    1,798,000.00       CM            3.60        6,472,800.00      
                                                                     --------------  -----------------       
</TABLE> 

                                    00010-4

<PAGE>
 
                                                   Contract No. DACW09-97-C-0035

                    SCHEDULE OF PAYMENT CONTINUATION

<TABLE> 
<CAPTION> 
ITEM         DESCRIPTION                                 QUANTITY       U/I     UNIT PRICE             AMOUNT       
- ----    ----------------------                         ------------     ---    -------------     -----------------  
<S>     <C>                                            <C>              <C>    <C>               <C>                
0015    (Continued)                                                                                                 
0015    DREDGE ELEMENT 114                             1,205,000.00     CM           3.60            4,338,000.00   
                                                                               -------------     -----------------   
                                                                                                                    
0016    DREDGE ELEMENT 114A                              241,000.00     CM           3.50              843,500.00   
                                                                               -------------     -----------------   
                                                                                                                    
0017    DREDGE ELEMENT 215                                                                                           
                                                                                                                    
0017A   FIRST 325,000 CUBIC METERS                       325,000.00     CM          30.30            9,847,500.00   
                                                                               -------------     -----------------  
                                                                                                                    
0017B   OVER 325,000 CUBIC METERS                        300,000.00     CM          10.00            3,000,000.00   
                                                                               -------------     -----------------   

0018    PLACE QUARRY RUN (R101-R106, R109, R110)       2,990,000.00     MT          13.53           40,454,700.00  
                                                                               -------------     -----------------

0019    PLACE ROCK ELEMENT 107 - A-500 ARMOR STONE       100,000.00     MT          13.53            1,353,000.00  
                                                                               -------------     ----------------- 
        
0020    PLACE ROCK ELEMENT 108 - A-1 ARMOR STONE          15,000.00     MT          13.53              202,950.00
                                                                               -------------     -----------------

0021    PLACE GEOTEXTILE FILTER                            2,500.00     M          150.00              375,000.00  
                                                                               -------------     -----------------

0022    OPTION ITEM - DREDGE ELEMENT 116                    


0022A   FIRST 100,000                                    100,000.00    CM            3.60              360,000.00       
                                                                               -------------     -----------------

0022B   OVER 100,000 TO 1,500,000                      1,400,000.00    CM            3.60            5,040,000.00  
                                                                               -------------     -----------------   

0023    OPTION ITEM - FILL QUALITY CONTROL AND                 1.00    JB       L.S.  .                800,000.00      
                                                                               -------------     -----------------   
        INSTRUMENTATION INSTALLATION

                                                        TOTAL ESTIMATED AMOUNT PLUS OPTION ITEMS: $ 147,685,450.00        
                                                                                                 -----------------                  
                                                                 TOTAL ESTIMATED CONTRACT AMOUNT: $ 141,485,450.00 
                                                                                                 -----------------   
</TABLE> 

        *DENOTES A CHANGE
                             END OF SECTION 00010

NOTE:  THE GOVERMENT RESERVES THE RIGHT TO AWARD OPTION ITEMS 0022A, 0022B AND
       0023 AT A LATER DATE.

                                                       Encl 1 to Amend. No. 0002

                                    00010-5
<PAGE>
 
[LOGO]           [LETTERHEAD OF DEPARTMENT OF THE ARMY APPEARS HERE]

                                  May 9, 1997


Small and Disadvantaged
Business Utilization Office




Great Lake Dredge & Dock/Connolly Pacific
  Joint Venture, dba Pier 400 Constructors
ATTN:  Michelle K. Youssef
       Contract Plan Administrator
2122 York Road
Oak Brook, Illinois 60521

Gentlemen:

     Reference is made to Solicitation No. DACW09-97-B-0009 for Stage 2, Port of
Los Angeles, Pier 400 Deep Draft, Navigation Improvements Los Angeles and Long 
Beach Harbors, San Pedro Bay, Los Angeles County, California.  Your 
subcontracting plan dated May 1, 1997, submitted pursuant to Contract Clause No.
34, "Small Business and Small Disadvantaged Business Subcontracting Plan - DOD 
Contracts - Alternate I" is hereby approved.

                                     Sincerely,
 
                                     /s/  J. A. Eugino
                                     J. A. Eugino 
                                     Contracting officer
<PAGE>
 
[LOGO]               [LETTERHEAD OF DEPARTMENT OF THE ARMY]

     REPLY TO
     ATTENTION OF:


Office of the Chief                                              97 Apr 30
Contract Compliance Branch

SUBJECT:  Request for Preaward Information for IFB # DACW09-97-B-0009, Stage 2,
          Port of Los Angeles, Pier 400 Deep Draft, Los Angeles and Long Beach
          Harbors, Los Angeles, County, California


Pier 400 Constructors
2122 York Road
Oak Brook, Illinois 60521

Mr. Douglas B. Mackie:

     In accordance with Section 00100, Paragraph 5, Contractor Responsibility, 
Pre-Award Survey, contained in the above-referenced project, please provide the
following information in order to perform a preaward survey on your firm:

     1.  List of projects completed for the past three years, including dollar 
amount of each contract.

     2.  List of projects in progress, percentage of work completed, including 
dollar value of each contract.

     3.  The name and qualifications of the employee designated to act as the 
Project Superintendent/Manager for this contract.

     4.  Copy of latest financial statement.

     5.  General description of your firm.


<PAGE>
 
     Please forward this information to Mrs. Pat Bonilla, Contract Compliance
Branch, P. O. Box 2711, Los Angeles, California 90053-2325, or express mail to
911 Wilshire Blvd., Room 1040, Los Angeles, California 90017-3401, as soon as
possible. If you have any questions regarding this matter, please call (213) 
452-3255 or use FAX (213) 452-4187.


                                         Sincerely,
                                      
                                         /s/ Pat Bonilla

                                         for Tina A. Frazier
                                         Chief,
                                         Contract Compliance Branch
<PAGE>
 
[LOGO APPEARS HERE]

                                                  US Army Corps of Engineers
                                                        Los Angeles District
                                                        Contracting Division

================================================================================
                                FAX COVER SHEET
================================================================================

             To Douglas Machie                       Pier 400 Constructures   
                ---------------                      ----------------------   
                NAME                                 OFFICE ????^

                630-574-3000                  630-574-3007                    
                ------------                  ------------                    
                Telephone No.                 Fax No.                         
================================================================================

          From  Par Bonilla                                                 
                -----------                          -------------          
                NAME                                 OFFICE ???^             
                                                                            
                213-452-3255                  COMM: (213) 452-4187          
                ------------                  --------------------          
                TELEPHONE NO.                 FAX NO.                        
================================================================================
       Subject  Request for ?????^ Survey Info
                ---------------------------------------------------
                97-B-0009
                ---------------------------------------------------
================================================================================
       Message  Please call upon receipt of this FAX
                ---------------------------------------------------
                               Thanks
                --------------------------------------------------- 

                ---------------------------------------------------  

                ---------------------------------------------------  

                ---------------------------------------------------  

================================================================================

                                Pages   
                                  3    
                               Including
                                 Cover  

<PAGE>
 
                  [LOGO OF GREAT LAKES DREDGE & DOCK COMPANY]

                               FAX TRANSMISSION

                       GREAT LAKES DREDGE & DOCK COMPANY
                                2122 YORK ROAD
                           OAK BROOK, IL 60521-1930

- --------------------------------------------------------------------------------
                          HYDRAULIC DREDGING DIVISION
- --------------------------------------------------------------------------------

TELEPHONE: (630) 574-3000                           FAX: (630) 574-1515


PLEASE DELIVER THE FOLLOWING AS SOON AS POSSIBLE:

DATE: 2 May 1997
- --------------------------------------------------------------------------------
TO: Mike Ellis / Clint Larison
- --------------------------------------------------------------------------------
COMPANY: Connelly - Pacific
- --------------------------------------------------------------------------------
FAX PHONE NO: 562-435-2035
- --------------------------------------------------------------------------------
FROM: Mike Ernst
- --------------------------------------------------------------------------------
SUBJECT: Pre-Award Info - Pier 400 - Stage 2
- --------------------------------------------------------------------------------

NO. OF PAGE(S): 4 (including cover page)
          
          PLEASE NOTIFY US IMMEDIATELY IF TRANSMISSION IS RECEIVED IMPROPERLY

NOTES:
- --------------------------------------------------------------------------------

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________


<PAGE>

********** -IND. XMT JOURNAL- ********* DATE MAY-02-1997 ****** TIME 10:48 *****
 
DATE/TIME    = MAY-02-1997 10:46        
                                        
JOURNAL No.  = 06                       
                                        
COMM.RESULT  = OK                         

PAGE(S)      = 004/004

DURATION     = 00:01'30

FILE NO.     = 011

MODE         = MEMORY TRANSMISSION

DESTINATION  = 15624352035

RECEIVED ID  = /310 435 2035

RESOLUTION   = FINE

********************** -            - ***** -                - *****************
<PAGE>
 
                    SMALL BUSINESS AND SMALL DISADVANTAGED
                         BUSINESS SUBCONTRACTING PLAN


CONTRACTOR:           Great Lakes Dredge & Dock/Connolly Pacific Joint Venture

ADDRESS:              2122 York Road, Oak Brook, IL 60521

SOLICITATION OR
CONTRACT NUMBER:      DACW09-97-B-0009

PROJECT TITLE:        Stage 2, Port of Los Angeles, Pier 400

TOTAL AMOUNT OF CONTRACT:  $147,685,450.00


                        STATEMENT OF CORPORATE POLICY
                        -----------------------------

The following with any attachments, is hereby submitted as a Subcontracting Plan
to satisfy the applicable requirements as set forth in the above-mentioned 
solicitation. Reference (Construction/Service) Contract Clause No. FAR 
52.219.9, "Small Business and Small Disadvantaged Business Subcontracting Plan
(Feb. 1990) ALT.1."

Great Lakes Dredge & Dock/Connolly Pacific Joint Venture as contractor for the
United States Army Corps of Engineers, understands clearly the government's
requirements that the successful large business prime contractor provide the
maximum practical opportunity for Small Business and Small Disadvantaged
Business concerns to participate in the performance of the contract's
subcontracting program.

Great Lakes Dredge & Dock/Connolly Pacific Joint Venture is committed, as a 
corporate policy, to compliance with both, the principle of government 
regulation, dealing with the issue of Small Business (SM), Small Disadvantaged 
Businesses (SDB's) and Historically Black Colleges/Minority Institutions 
(HBCU/MI's) subcontracting.

The Subcontracting Plan which follows, details our commitments in this regard.

1.   Type of Plan (Check One)
     ------------

      X    Individual plan (All elements developed specifically for this 
     ---  
           contract and applicable for the full term of this contract).

     ___   Master plan (Goals developed for this contract; all other elements 
           standard; must be renewed annually).

     ___   Commercial products plan (Contractor sells large quantities of 
           off-the-shelf commodities to many Government agencies. Plans/goals 
           negotiated by a lead agency on a company-wide basis rather than for
           individual contracts. Plan effective only during year approved.
           Contractor must provide copy of lead agency approval).


<PAGE>
 

Subcontracting Plan
Stage 2, Port of Los Angeles, Pier 400
DACW09-97-B-0009
Page 2

2.   Goals  -  BASE
     -----

     a.   Total estimated dollar value of all planned subcontracting, i.e., with
          all types of organizations under this contract, is $8,859,547.
          ---

     b.   Total estimated dollar value and percentage of planned subcontracting 
          with large business concerns: $3,543,819.00 - 40%

     c.   Total estimated dollar value and percentage of planned subcontracting 
          with small business concerns: $5,315,728.00 - (60%).

     d.   Total dollars planned to be subcontracted to Small Non-Disadvantaged 
          Business Concerns: $4,518,369.00 - (85% of C.).

     e.   Total dollars planned to be subcontracted to Small Disadvantaged 
          Business Concerns: $531,572.00 - (10% of A.). This amount includes
          Historical Black Colleges/Minority Institutions (HBCU/MI).

     d.   Total dollars planned to be subcontracted to Women Owned Business 
          Concerns: $265,786.00 - (5% of A.).

     Goals  -  INCLUDING OPTIONS
     -----

     a.   Total estimated dollar value of ali planned subcontracting, i.e., with
          all types of organizations under this contract, is $9,830,586.00
          ---

     b.   Total estimated dollar value and percentage of planned subcontracting 
          with large business concerns: $3,932,234.00 - 40%

     c.   Total estimated dollar value and percentage of planned subcontracting
          with small business concerns: $5,898,352.00 - (60%).

     d.   Total dollars planned to be subcontracted to Small Non-Disadvantaged 
          Business Concerns: $5,13,599.00 - (85% of C.).

     e.   Total dollars planned to be subcontracted to Small Disadvantaged 
          Business Concerns: $589,835.00 - (10% of A.). This amount includes 
          Historical Black Colleges/Minority Institutions (HBCU/MI).

     d.   Total dollars planned to be subcontracted to Women Owned Business 
          Concerns: $294,918.00 - (5% of A.).

3.   Indirect and overhead costs have not been included in establishing goals 
     for both Small
<PAGE>
 
Subcontracting Plan
Stage 2, Port of Los Angeles, Pier 400
DACW09-97-B-0009
Page 3

     Business and Small Disadvantaged Business Concerns.

4.   All products and/or services to be subcontracted under this contract, with
     ---
     the types of organizations supplying them: (i.e., LARGE BUSINESS (LG),
     SMALL BUSINESS (SB), SMALL DISADVANTAGED BUSINESS (SDB) AND WOMEN OWNED
     BUSINESS (WOB).

     a.   Subcontracted Product/Service      LG   SB   SDB   WOB

          Fuel                                     X          X
          Marine Supplies                     X    X    X     X
          Lubricants                          X
          Marine Hardware                          X    X     X
          Paper Products                                X
          Wire Rope & Cordage                      X
          Towing                              X
          Survey Services                          X

     b.   We intend to continue the use of our known SB/SDB/HBCU/MI Concerns in
          the categories above and will make every effort to expand this list.
                                   ------------------------------------------
          We are training our field office managers in the company purchasing
          policies and allowing them more purchasing authorities.

5.   The following methods are used in developing the subcontracting goals.

     a.   Subcontracting plan prior percentages.

     b.   Availability of vendors in various geographic locations as indicated 
          by prior experience.

     c.   Availability of vendors in project locations which could increase the 
          number of SDB/HBCU/MI sources to award subcontracts.

6.   Potential sources are identified as follows:

     a.   Existing company vendor list.

     b.   Advertisements run in local newspapers.

     c.   Make maximum use of the new SB/SDB/HBCU/MI names received from the 
          sources listed.

     d.   New SB/SDB/HBCU/MI and WOB letters received from SBA and individual

<PAGE>
 
Subcontracting Plan
Stage 2, Port of Los Angeles, Pier 400
DACW09-97-B-0009
Page 4


          businesses.

     e.   Seek out, through their own industry contacts, new and capable 
          SB/SDB/HBCU/MI suppliers and technical support.

     f.   Attend small and minority business conferences and trade fairs.

7.   Program Administrator
     ---------------------

     a.   The following employee will administer this Subcontracting Plan for 
          Great Lakes Dredge & Dock/Connolly Pacific Joint Venture.

     Name:          Michelle K. Youssef
     Title:         Contract Plans Administrator
     Address:       2122 York Road, Oak Brook, IL 60521
     Telephone:     630/574-2996

     Duties:        This employee has general overall responsibility for Great 
                    Lakes Dredge & Dock Company subcontracting program, i.e.,
                    developing, preparing, and executing individual
                    subcontracting plans and monitoring performance relative to
                    the requirements of this particular plan. These duties
                    include, but are not limited to, the following activities:

                    a.   Developing and promoting company-wide policy
                         initiatives that demonstrate the company's support for
                         awarding contracts and subcontracts to small and small
                         disadvantaged business concerns and assure that small
                         and small disadvantaged businesses are included on the
                         source lists for solicitations for products and
                         services they are capable of providing:

                    b.   Developing and maintaining bidder's lists of small and
                         small disadvantaged business concerns from all possible
                         sources;

                    c.   Ensuring periodic rotation of potential subcontractors 
                         on bidder's lists:

                    d.   Ensuring that procurement "packages" are designed to
                         permit the maximum possible participation of small and
                         small disadvantaged businesses;

                    e.   Make arrangements for the utilization of various
                         sources for the identification of small and small
                         disadvantaged businesses such as the SBA's Procurement
                         Automated Source System (PASS), the National Minority
                         Purchasing Council Vendor Information Service, the

<PAGE>
 
Subcontracting Plan
Stage 2, Port of Los Angeles, Pier 400
DACW09-97-B-0009
Page 5

                         Office of Minority Business Data Center in the 
                         Department of Commerce, and the facilities of local
                         small business and minority associations, and contact
                         with Federal agency's Small and Disadvantaged Business
                         Utilization Specialist (SADBUS).

                    f.   Overseeing the establishment and maintenance of 
                         contract and subcontract award records;

                    g.   Attending or arranging for the attendance of company
                         counselors at Business Opportunity Workshops, Minority
                         Business Enterprise Seminars, Trade Fairs, Procurement
                         Conferences, etc;

                    h.   Ensure small and small disadvantaged business concerns
                         are made aware of subcontracting opportunities and how
                         to prepare responsive bids to the company;

                    i.   Conducting or arranging for the conduct of training for
                         purchasing personnel regarding the intent and impact of
                         Public Law 95-507 on purchasing procedures;

                    j.   Monitoring the company's performance and making any
                         adjustments necessary to achieve the subcontract plan
                         goals;

                    k.   Preparing and submitting timely, required subcontract 
                         reports;

                    l.   Coordinating the company's activities during the 
                         conduct of compliance reviews by Federal agencies; and,

8.   Equitable Opportunity
     ---------------------

     Great Lakes Dredge & Dock/Connolly-Pacific Joint Venture will maintain an
     open door policy to all suppliers wishing to participate and emphasis is
     continually placed on locating additional Small and Disadvantaged Business
     Concerns. This will be accomplished through outreach efforts as follows:

     a.   Contacts with minority and small business trade associations.

     b.   Contacts with business development organizations.

     c.   Attendance at small and minority business procurement conferences and 
          trade fairs.

     d.   Develop a unique outreach program that will include the use of 
          Historical Black
     
<PAGE>
 
Subcontracting Plan
Stage 2, Port of Los Angeles, Pier 400
DACW09-97-B-0009
Page 6

          Colleges and Universities and Minority Institutions (HBCU/MI in
          nontraditional areas such as technical assistance and marketing
          applications. Set-aside acquisitions for exclusive HBCU and MI
          participation maybe used if project needs technical assistance which
          higher educational institutions can provide.

     e.   Sources will be requested from SBA's PASS system.

     f.   The following internal efforts will be made to guide and encourage 
          buyers:

          1.   Workshop, seminars and training programs will be conducted.

          2.   Activities will be monitored to evaluate compliance with this
               subcontracting plan.

     Small and Small Disadvantaged Business Concern source lists, guides and
     other data identifying Small and Small Disadvantaged Business Concerns will
     be maintained and utilized by Buyers in soliciting subcontracts.

9.   Flow-Down Clause
     ----------------

     Great Lakes Dredge & Dock/Connolly Pacific Joint Venture agrees to include
     the provisions under FAR 52.219-9, "Utilization of Small Business Concerns
     and Small Disadvantaged Business Concerns", in all subcontracts that
     offer further subcontracting opportunities. All subcontractors, except
     small business concerns, that receive subcontracts in excess of $500,000
     ($1,000,000 for construction) must adopt and comply with a plan similar to
     the plan required by FAR 52.219-9, "Small Business and Small Disadvantaged
     Business Subcontracting Plan." (FAR 19.704 (a)(4).

10.  Reporting and Cooperation
     -------------------------

     Great Lakes Dredge & Dock/Connolly Pacific Joint Venture gives assurance of
     (1) cooperation in any studies or surveys that may be required; (2)
     submission of periodic reports which show compliance with the
     subcontracting plan, (3) submission of Standard Form (SF)294,              
     "Subcontracting Report for Individual Contracts,: and SF-295, "Summary
     Subcontract Report," in accordance with the instructions on the forms, and
     (4) ensuring that subcontractors agree to submit Standard Forms 294 and
     295.

11.  Recordkeeping
     -------------

     The following is a recitation of the types of records Great Lakes Dredge &
     Dock/Connolly Pacific Joint Venture will maintain to demonstrate the
     procedures adopted to comply with the requirement and goals in the
     subcontracting plan: These records will include, but not be limited to, the
     following:

<PAGE>
 
Subcontracting Plan
Stage 2, Port of Los Angeles, Pier 400
DACW09-97-B-0009
Page 7

     a.   Small and small disadvantaged business concerns source lists, guides, 
          and other data identifying such vendors;

     b.   Organizations contacted in an attempt to locate small and small 
          disadvantaged business sources;

     c.   On a contract-by-contract basis, records on all subcontract 
          solicitations over $100,000 which indicate for each solicitation (1) 
          whether small business concerns were solicited, and if not, why not;
          (2) whether small disadvantaged business concerns were solicited, and
          if not, why not; and (3) reason for the failure of solicited small or
          small disadvantaged business concerns to receive the subcontract 
          award;

     d.   Records to support other outreach efforts, e.g., contacts with 
          minority and small business trade associations, attendance at small 
          and minority business procurement conferences and trade fairs;

     e.   Records to support internal guidance and encouragement provided to
          buyers through (1) workshops, seminars, training programs, incentive
          awards, and (2) monitoring of activities to evaluate compliances; and

     f.   On a contract-by-contract basis, records to support subcontract award
          data including the name, address and business size of each
          subcontractor.

This subcontracting plan was submitted by:

     Signature:     /s/ Michelle K. Youssef
                    --------------------------------------
     Typed Name:    Michelle K. Youssef
     Title:         Contract Plans Administrator
     Date Prepared: May 1, 1997
     Phone No:      (630) 574-2996


<PAGE>
 
Solicitation No: DACW09-97-B-0009


                      CERTIFICATE OF CORPORATE PRINCIPALS

1)   IF THE OFFEROR IS A JOINT VENTURE, COMPLETE THE FOLLOWING:

Great Lakes Dredge &
Dock Company                  /s/ Signature Illegible^^     President/CEO
- --------------------          -------------------------     ----------------
   (Company Name)                  (Signature)                   (Title)

Connolly-Pacific Co.          /s/ Signature Illegible^^     Chairman
- --------------------          -------------------------     ----------------
   (Company Name)                  (Signature)                   (Title)


____________________          _________________________     ________________
   (Company Name)                  (Signature)                   (Title)



2)   IF THE OFFEROR IS PARTNERSHIP, LIST FULL NAME OF ALL PARTNERS:


____________________          _________________________     ________________
   (Company Name)                  (Signature)                   (Title)


____________________          _________________________     ________________
   (Company Name)                  (Signature)                   (Title)


____________________          _________________________     ________________
   (Company Name)                  (Signature)                   (Title)


3)   IF THE OFFEROR IS A CORPORATION, THE FOLLOWING CERTIFICATION SHOULD BE 
     COMPLETED:

                     CERTIFICATE AS TO CORPORATE PRINCIPAL

     I, __________________________, certify that I am the Secretary of the 
corporation named as principal in the within contract; that ___________________,
who signed the said contract on behalf of the principal, was the 
______________________ of the corporation; that I know his signature and that 
his signature is genuine; and that said contract was duly signed, sealed and 
attested for in behalf of said corporation by authority of its governing body.

                            _______________________
                              CORPORATE PRINCIPAL

CORPORATE SEAL

                            _______________________
                                   SECRETARY


                                   00010-2a
<PAGE>
 
                               TABLE OF CONTENTS

                                 SECTION 00600


                       REPRESENTATIONS & CERTIFICATIONS

<TABLE> 
<CAPTION> 
PARAGRAPH      CLAUSE         TITLE                                                                           PAGE
<S>            <C>            <C>                                                                             <C>      
 1             52.203-8       CANCELLATION, RESCISSION, AND RECOVERY OF FUNDS FOR ILLEGAL OR IMPROPER         00600-1
                              ACTIVITY (JAN 1997)
 
 2             52.203-2       CERTIFICATE OF INDEPENDENT PRICE DETERMINATION (APR 1995)                       00600-1
 
 3             52.203-11      CERTIFICATION AND DISCLOSURE REGARDING PAYMENTS TO INFLUENCE CERTAIN            00600-2
                              FEDERAL TRANSACTIONS (APR 1991)
 
 4             52.204-3       TAXPAYER IDENTIFICATION (MAR 1994)                                              00600-3
 
 5             52.209-5       CERTIFICATION REGARDING DEBARMENT, SUSPENSION, PROPOSED DEBARMENT, AND          00600-5
                              OFFER RESPONSIBILITY MATTERS (MAR 1996)
 
 6             52.214-2       TYPE OF BUSINESS ORGANIZATION -- SEALED BIDDING (JUL 1997)                      00600-6
 
 7             52.219-1       SMALL BUSINESS PROGRAM REPRESENTATIONS (JAN 1997)                               00600-6
 
 8             52.219-2       EQUAL LOW BIDS (OCT 1995)                                                       00600-8
 
 9             52.219-19      SMALL BUSINESS CONCERN REPRESENTATION FOR THE SMALL BUSINESS                    00600-9
                              COMPETITIVENESS DEMONSTRATION PROGRAM (JAN 1997)

10             52.222-21      CERTIFICATION OF NONSEGREGATED FACILITIES (APR 1984)                            00600-10

11             52.222-22      PREVIOUS CONTRACTS AND COMPLIANCE REPORTS (APR 1984)                            00600-11

12             52.223-1       CLEAN AIR AND WATER CERTIFICATION (APR 1984)                                    00600-11

13             52.223-13      CERTIFICATION OF TOXIC CHEMICAL RELEASE REPORTING (OCT 1996)                    00600-12

14             252.204-7001   COMMERCIAL AND GOVERNMENT ENTITY (CAGE) CODE REPORTING (DEC 1991)               00600-13

15             252.209-7001   DISCLOSURE OF OWNERSHIP OR CONTROL BY THE GOVERNMENT OF A TERRORIST             00600-13
                              COUNTRY (SEP 1994)

16             252.209-7003   DISCLOSURE OF COMMERCIAL TRANSACTIONS WITH THE GOVERNMENT OF A TERRORIST        00600-14
                              COUNTRY (SEPT 1994)
</TABLE> 

                                       i

<PAGE>
 
                                 SECTION 00600

                        REPRESENTATIONS & CERTIFICATIONS

<TABLE> 
<S>            <C>                 <C>                                                                        <C> 
17             252.219-7000        SMALL DISADVANTAGED BUSINESS CONCERN REPRESENTATION (DoD CONTRACTS)        00600-15
                                   (JAN 1997)

18             252.225-7006        BUY AMERICAN ACT -- TRADE AGREEMENTS -- BALANCE OF PAYMENTS PROGRAM        00600-16
                                   CERTIFICATE (JAN 1994)

19             252.225-7035        BUY AMERICAN ACT -- NORTH AMERICAN FREE TRADE AGREEMENT IMPLEMENTATION     00600-18
                                   ACT -- BALANCE OF PAYMENTS PROGRAM CERTIFICATE (MAY 1995)

20             252.247-7022        REPRESENTATION OF EXTENT OF TRANSPORTATION BY SEA (AUG 1992)               00600-19
</TABLE> 

                                        ii

<PAGE>
 
                                 SECTION 00600

                       REPRESENTATIONS & CERTIFICATIONS


1    52.203-8       CANCELLATION, RESCISSION, AND RECOVERY OF FUNDS FOR ILLEGAL 
                    OR IMPROPER ACTIVITY (JAN 1997)

          (a) If the Government receives information that a contractor or a 
     person has engaged in conduct constituting a violation of subsection (a), 
     (b), (c), or (d) of Section 27 of the Office of Federal Procurement Policy 
     Act (41 U.S.C. 423) (the Act), as amended by section 4304 of the 1996 
     National Defense Authorization Act for Fiscal Year 1996 (Pub. L. 104-106),
     the Government may--

              (1) Cancel the solicitation, if the contract has not yet been 
          awarded or issued; or

              (2) Rescind the contract with respect to which--

                 (i)  The Contractor or someone acting for the Contractor has 
              been convicted for an offense where the conduct constitutes a 
              violation of subsection 27 (a) or (b) of the Act for the purpose 
              of either--
                 
                   (A) Exchanging the information covered by such subsections 
                 for anything of value: or

                   (B) Obtaining or giving anyone a competitive advantage in 
                 the award of a Federal agency procurement contract, or

                 (ii) The head of the contracting activity has determined, based
              upon a preponderance of the evidence, that the Contractor or 
              someone acting for the Contractor has engaged in conduct 
              constituting an offense ^??? punishable under subsections 27(e)
              (1) of the Act.

           (b) If the Government rescinds the contract under paragraph (a) of 
     this clause, the Government is entitled to recover, in addition to any 
     penalty prescribed by law, the amount expended under the contract.

           (c) The rights and remedies of the Government specified herein are 
     not exclusive, and are in addition to any other rights and remedies
     provided by law, regulation, or under this contract.

                                (End of clause)


2    52.203-2       CERTIFICATE OF INDEPENDENT PRICE DETERMINATION (APR 1985)

           (a) The offeror certifies that--

            (1) The price in this offer have been arrived at independently, 
          without, for the purpose of restricting competition, any consultation,
          communication, or agreement which any other offeror or competitor 
          relating to (i) those prices, (ii) the intention to submit an offer, 
          or (iii) the methods or factors used to calculate the prices offered;

            (2) The price in this offer have not been and will not be knowingly

                                    00600-1
<PAGE>
 
               disclosed by the offeror, directly or indirectly, to any other 
               offeror or competitor before bid opening (in the case of a 
               sealed bid solicitation) or contract award (in the case of a 
               negotiated solicitation) unless otherwise required by law; and  
                                                                               
                    (3)  No attempt has been made or will be made by the 
               offeror to induce any other concern to submit or not to submit 
               an offer for the purpose of restricting competition.    
                                                                               
               (b)  Each signature on the offer is considered to be a 
     certification by the signatory that the signatory--                       
                                                                               
                    (1)  Is the person in the offeror's organization 
               responsible for determining the prices being offered in this bid
               or proposal, and that the signatory has not participated and 
               will not participate in any action contrary to subparagraphs (a)
               (1) through (a) (3) above; or    
                                                                               
                    (2)  (i)   Has been authorized, in writing, to act as agent
               for the following principals in certifying that those principals 
               have not participated, and will not participate in any action 
               contrary to subparagraphs (a) (1) through (a) (3) above _________
               _________________________________________________________________
               (insert full name of person(s) in the offeror's organization    
               responsible for determining the prices offered in this bid or    
               proposal, and the title of his or her position in the offeror's 
               organization);                                                   
                                                                               
                         (ii)  As an authorized agent, does certify that the   
               principals named in subdivision (b) (2) (i) above have not      
               participated, and will not participate, in any action contrary 
               to subparagraphs (a) (1) through (a) (3) above; and             
                                                                               
                         (iii) As an agent, has not personally participated, 
               and will not participate, in any action contrary to 
               subparagraphs (a) (1) through (a) (3) above.      
          
               (c)  If the offeror deletes or modifies subparagraph (a) (2)
     above, the offeror must furnish with its offer a signed statement setting
     forth in detail the circumstances of the disclosure.

                              (End of provision)

3    52.203-11    CERTIFICATION AND DISCLOSURE REGARDING PAYMENTS TO INFLUENCE 
                  CERTAIN FEDERAL TRANSACTIONS (APR 1991) 

          (a)  The definitions and prohibitions contained in the clause, at PAR
     52.203-12, Limitation on Payments to Influence Certain Federal 
     Transactions, included in this solicitation, are hereby incorporated by 
     reference in paragraph (b) of this certification.

<PAGE>
                                                                               
          (b)  The offeror, by signing its offer, hereby certifies to the best
     of his or her knowledge and belief that on or after December 23, 1989,--  
                                                                                
            (1)  No Federal appropriated funds have been paid or will be paid 
          to any person for influencing or attempting to influence an officer 
          or employee of any agency, a Member of Congress, an officer or 
          employee of Congress, or an employee of a Member of Congress on him 
          or her behalf in connection with the awarding of any Federal 
          contract, the making of any Federal grant, the making of any Federal 
          loan, the entering into of any cooperative agreement, and the 
          extension, continuation, renewal, amendment or modification of any 
          Federal contract, grant, loan, or cooperative agreement;             
                                                                                
            (2)  If any funds other than Federal appropriated funds (including 
          profit or fee received under a covered Federal transaction) have been 
          paid, or will be paid, to any person for influencing or attempting to
          influence an officer or employee of any agency, a Member of Congress, 
          an officer or employee of Congress, or an employee of a Member of 
          Congress on his or her behalf in connection with this solicitation, 
          the offeror shall complete and submit, with its offer, OMB standard 
          form LLL, Disclosure of Lobbying Activities, to the Contracting 
          Officer; and                                
                                                                                
            (3)  He or she will include the language of this certification in 
          all subcontract awards at any tier and require that all recipiants of
          subcontract awards in excess of $100,000 shall certify and disclose 
          accordingly.

          (c)  Submission of this certification and disclosure is a prerequisite
     for making or entering into this contract imposed by section 1352, title 
     31, United States Code. Any person who makes an expenditure prohibited 
     under this provision or who fails to file or amend the disclosure form to 
     be filed or amended by this provision, shall be subject to a civil penalty 
     of not less than $10,000, and not more than $100,000, for each such 
     failure.                                      
                                                                               
                            (End of provision)                           
                                                                                
4    52.204-3       TAXPAYER IDENTIFICATION (MAR 1994)                         
                                                                               
          (a)  Definitions.                                                   
                                                                               
          "Common parent," as used in this solicitation provision, means that  
     corporate entity that owns or controls an affiliated group of corporations
     that files its Federal income tax returns on a consolidated basis, and of
     which the offeror is a member.

          "Corporate status," as used in this solicitation provision, means a  

                                    00600-3
<PAGE>
 
designation as to whether the offeror is a corporate entity, an unincorporated
entity (e.g., sole proprietorship or partnership), or a corporation providing
medical and health care services.
     
     "Taxpayer Identification Number (TIN)," as used in this solicitation
provision, means the number required by the IRS to be used by the offeror in
reporting income tax and other returns.

     (b)  All offerors are required to submit the information required in 
paragraphs (c) through (e) of this solicitation provision in order to comply 
with reporting requirements of 26 U.S.C 6041, 6041A, and 6050M and implementing 
regulations issued by the Internal Revenue Service (IRS). If the resulting 
contract is subject to the reporting requirements described in FAR 4.903, the 
failure or refusal by the offeror to furnish the information may result in a 31 
percent reduction of payments otherwise due under the contract.

     (c)  Taxpayer Identification Number (TIN). Pier 400 Constructors: None
                                                                       ---- 
          
       [X][X]  TIN: REFER TO THE RIGHT:         Great Lakes Dredge & Dock 
                    ------------------.
                                                Company: 36-1163930
                                                         ----------

          [_]  TIN has been applied for.        Connolly-Pacific Co.: 46-0349158
                                                                      ----------

          [_]  TIN is not required because:  

          [_]  Offeror is a nonresident alien, foreign corporation, or foreign 
partnership that does not have income effectively connected with the conduct of 
a trade or business in the U.S. and does not have an office or place of business
or a fiscal paying agent in the U.S. ?????^

          [_]  Offeror is an agency or instrumentality of a foreign government; 

          [_]  Offeror is an agency or instrumentality of a Federal, state, or
local government;

          [_]  Other. State basis, _____________________________________ 

     (d)  Corporate Status.

          [_]  Corporation providing medical and health care services, or
engaged in the billing and collecting of payments for such services;

          [_]  Other corporate entity;
          
          [_]  Not a corporate entity;

          [_]  Sole proprietorship

       [X][X]  Partnership (a joint venture)
          
          [_]  Hospital or extended care facility described in 26 CFR 501 (c) 
(3) that is exempt from taxation under 26 CFR 501 (a).

     (e)  Common Parent.

          [_]  Offeror is not owned or controlled by a common parent as defined 
in paragraph (a) of this clause.
          
       [X][X]  Name and TIN of common parent:

Name REFER EXPLANATIONS BELOW:
     ----------------------------
TIN  ____________________________

"Pier 400 Constructors" is a joint venture of "Great Lakes Dredge & Dock 
Company" and "Connolly-Pacific Co."

"Great Lakes Dredge & Dock Company" common parent:
Name: Great Lakes International, Inc. 
      -------------------------------
TIN:  36-3015839 
      ----------

"Connolly-Pacific Co." common parent:
Name: L.G. Everist, Inc.
      ------------------   
TIN:  46-0229601 
      ----------
<PAGE>
 
                              (End of provision)

5    52.209-5       CERTIFICATION REGARDING DEBARMENT, SUSPENSION, PROPOSED 
                    DEBARMENT, AND OTHER RESPONSIBILITY MATTERS (MAR 1996)

      (a)(i)  The Offeror certifies, to the best of its knowledge and belief, 
     that--
          (i) The Offeror and/or any of its Principals--
 
           (A) Are [_] are not [X] presently debarred, suspended, proposed for 
          debarment, or declared ineligible for the award of contracts by any 
          Federal agency;

           (B) Have [_] have not [X], within a three-year period preceding this 
          offer, been convinced of or had a civil judgment rendered against 
          them for: commission of fraud or a criminal offense in connection with
          obtaining, attempting to obtain, or performing a public (Federal, 
          state, or local) contract or subcontract: violation of Federal or 
          state antitrust statutes relating to the submission of offers: or 
          commission of embezzlement, theft, forgery, bribery, falsification or 
          destruction of records, making false statements, tax evasion, or 
          receiving stolen property; and 

           (C) Are [_] are not [X] presently indicted for, or otherwise 
          criminally or civilly charged by a governmental entity with, 
          commission of any of the offenses enumerated in subdivision 
          (a)(l)(1)(B) of this provision.

           (ii) The Offeror has [_] has not [X], within a three-year period
          preceding this offer, had one or more contracts terminated for default
          by any Federal agency.

          (2) "Principals," for the purposes of this certification, means 
       officers; directors; owners; partners; and, persons having primary
       management or supervisory responsibilities within a business entity
       (e.g., general manager: plant manager: head of a subsidiary, division, or
       business segment, and similar positions).

     THIS CERTIFICATION CONCERNS A MATTER WITHIN THE JURISDICTION OF AN AGENCY
     OF THE UNITED STATES AND THE MAKING OF A FALSE, PICTITIOUS, OR FRAUDULENT
     CERTIFICATION MAY RENDER THE MAKER SUBJECT TO PROSECUTION UNDER SECTION
     1001, TITLE 18, UNITED STATES CODE.

       (b) The Offeror shall provide immediate written notice to the Contracting
     Officer if, at any time prior to contract award, the Offeror learns that 
     its certification was erroneous when submitted or has become erroneous by 
     reason of changed circumstances.

                                   00600-5  
<PAGE>
 
          (c)  A certification that any of the items in paragraph (a) of this
     provision exists will not necessarily result in withholding of an award
     under this solicitation. However, the certification will be considered in
     connection with a determination of the Offeror's responsibility. Failure of
     the Offeror to furnish a certification or provide such additional
     information as requested by the Contracting Officer may render the Offeror
     nonresponsible.

          (d)  Nothing contained in the foregoing shall be construed to require
     establishment of a system of records in order to render, in good faith, the
     certification required by paragraph (a) of this provision. The knowledge
     and information of an Offeror is not required to exceed that which is
     normally possessed by a prudent person in the ordinary course of business
     dealings.

          (e)  The certification in paragraph (a) of this provision is a
     material representation of fact upon which reliance was placed when making
     award. If it is later determined that the Offeror knowingly rendered an
     erroneous certification, in addition to other remedies available to the
     Government, the Contracting Officer may terminate the contract resulting
     from this solicitation for default.

                              (End of Provision)

6    52.214-2   TYPE OF BUSINESS ORGANIZATION--SEALED BIDDING (JUL 1987)

          The bidder, by checking the applicable box, represents that--

          (a)  It operates as [_] a corporation incorporated under the laws of
     the State of _______________, [_] an individual, [_] a partnership, [_] a
     nonprofit organization, or [X] a joint venture; or

          (b)  If the bidder is a foreign entity, it operates as [_] an
     individual, [_] a partnership, [_] a nonprofit organization, [_] a joint
     venture, or [_] a corporation, registered for business in _____________
                                                                 (country)

                              (End of provision)


7    52.219-1  SMALL BUSINESS PROGRAM REPRESENTATIONS (JAN 1997)    

          (a)(1) The standard industrial classification (SIC) code for this 
          acquisition is 1629

               (2)  The small business size standard is $13.5 million

               (3)  The small business size standard for a concern which 
                    submits an

                                    00600-6
<PAGE>
 
          offer in its own name, other than on a construction or service
          contract, but which proposes to furnish a product which it did not
          itself manufacture, is 500 employees.

          (b) Representations. (1) The offeror represents as part of its offer
     that it [ ] is, [X] is not a small business concern.

              (2) (Complete only if offeror represented itself as a small
          business concern in block (b)(1) of this section.) The offeror
          represents as part of its offer that is [ ] is, [ ] is not a small
          disadvantaged business concern.

              (3) (Complete only if offeror represented itself as a small
          business concern in block (b)(1) of this section.) The offeror
          represents as part of its offer that it [ ] is, [ ] is not a woman-
          owned small business concern.

          (c) Definitions. "Joint venture," for purposes of a small
     disadvantaged business (SDB) set-aside or price evaluation preference (as
     prescribed at 13 CFR 124.321), is a concern that is owned and controlled by
     one or more socially and economically disadvantaged individuals entering
     into a joint venture agreement with one or more business concerns and is
     considered to be affiliated for size purposes with such other concern(s).
     The combined annual receipts or employees of the concerns entering into the
     joint venture must meet the applicable size standard corresponding to the
     SIC code designated for the contract. The majority of the venture's
     earnings must accrue directly to the socially and economically
     disadvantaged individuals in the SDB concern(s) in the joint venture. The
     percentage of the ownership involvement in a joint venture by disadvantaged
     individuals must be at least 51 percent.

          "Small business concern," as used in this provision, means a concern,
     including its affiliates, that is independently owned and operated, not
     dominant in the field of operation in which it is bidding on Government
     contracts, and qualified as a small business under the criteria in 13 CFR
     Part 121 and the size standard in paragraph (a) of this provision.

          "Small disadvantaged business concern," as used in this provision,
     means a small business concern that (1) is at least 51 percent
     unconditionally owned by one or more individuals who are both socially and
     economically disadvantaged, or a publicly owned business having at least 51
     percent of its stock unconditionally owned by one or more socially and
     economically disadvantaged individuals, and (2) has its management and
     daily business controlled by one or more such individuals. This term also
     means a small business concern that is at least 51 percent unconditionally
     owned by an economically disadvantaged Indian tribe or Native Hawaiian
     Organization, or a publicly owned business having at least 51 percent of
     its stock

                                    00600-7
<PAGE>
 
   unconditionally owned by one or more of these entities, which has its
   management and daily business controlled by members of an economically
   disadvantaged Indian tribe or Native Hawaiian Organization, and which meets
   the requirements of 13 CFR Part 124.

     "Women-owned small business concern," as used in this provision, means a
   small business concern--

      (1) Which is at least 51 percent owned by one or more women or, in the
    case of any publicly owned business, at least 51 percent of the stock of
    which is owned by one or more women; and
 
      (2) Whose management and daily business operations are controlled by one
    or more women.

     (d) Notice. (1) If this solicitation is for supplies and has been set
   aside, in whole or in part, for small business concerns, then the clause in
   this solicitation providing notice of the set-aside contains restrictions on
   the source of the end items to be furnished.

      (2) Under 15 U.S.C 645 (d), any person who misrepresents a firm's status
    as a small or small disadvantaged business concern in order to obtain a
    contract to be awarded under the preference programs established pursuant to
    sections 8 (a) 8 (d), 9, or 15 of the small Business Act or any other
    provision of the Federal law that specifically references section 8(d) for a
    definition of program eligibility, shall--

         (i)    Be punished by imposition of fine, imprisonment, or both:

         (ii)   Be subject to administrative remedies, including suspension and 
       debarment: and 

         (iii)  Be in ineligible for participation in programs conducted under
       the authority of the Act.
     
                              (End of provision)

   
8    52.219-2          EQUAL LOW BIDS (OCT 1995)

      (a) This applies to small business concerns only.

      (b) The bidder's status as a labor surplus area (LSA) concern may affect
   entitlement to award in case of tie bids. If the bidder wishes to be
   considered for this priority, the bidder must identify, in the following
   space, the LSA in which the costs to be incurred on account of manufacturing
   or production (by the bidder or the first-tier subcontractors) amount to more
   than 50 percent of the contract price.

      --------------------------------------------------------------------

                                    00600-8
<PAGE>
 
     ---------------------------------------------------------------------------

          (c)  Failure to identify the labor surplus areas as specified in
     paragraph (b) of this provision will preclude the bidder from receiving
     priority consideration. If the bidder is awarded a contract as a result of
     receiving priority consideration under this provision and would not have
     otherwise received award, the bidder shall perform the contract or cause
     the contract to be performed in accordance with the obligations of an LSA
     concern.

                              (End of provision)


9    52.219-19      SMALL BUSINESS CONCERN REPRESENTATION FOR THE SMALL BUSINESS
                    COMPETITIVENESS DEMONSTRATION PROGRAM (JAN 1997)

          (a)  Definition.

          "Emerging small business" as used in this solicitation, means a small
     business concern whose size is no greater than 50 percent of the numerical
     size standard applicable to the standard industrial classification code
     assigned to a contracting opportunity.

          (b)  (Complete only if the Offeror has represented itself under the
     provision at 52.219-1 as a small business concern under the size standards
     of this solicitation.)

          The Offeror [ ] is, [X] is not an emerging small business.

          (c)  (Complete only if the Offeror is a small business or an emerging 
     small business, indicating its size range.)

          Offeror's number of employees for the past 12 months (check this
     column if size standard stated in solicitation is expressed in terms of
     number of employees) or Offeror's average annual gross revenue for the last
     3 fiscal years (check this column if size standard stated in solicitation
     is expressed in terms of annual receipts). (Check one of the following.)

<TABLE> 
<CAPTION> 
     ----------------------------------------------------------
     No. of Employees         Avg. Annual Gross Revenues
     ----------------------------------------------------------
     <S>                      <C> 
     _____50 or fewer         ______$1 million or less
     _____51-100              ______$1,000,001-$2 million
     _____101-250             ______$2,000,001-$3.5 million
     _____251-500             ______$3,500,001-$5 million
</TABLE> 

                                    00600-9
<PAGE>
 
     ___501-750                          ___$5,000,001-$10 million
     ___751-1,000                        ___$10,000,001-$17 million
     ___Over 1,000                       ___Over $17 million
- -------------------------------------------------------------------

                              (End of provision)

10   52.222-21      CERTIFICATION OF NONSEGREGATED FACILITIES (APR 1984)

       (a) "Segregated facilities," as used in this provision, means any waiting
     rooms, work areas, rest rooms and wash rooms, restaurants and other eating
     areas, time clocks, locker rooms and other storage or dressing areas,
     parking lots, drinking fountains, recreation or entertainment areas,
     transportation, and housing facilities provided for employees, that are
     segregated by explicit directive or are in fact segregated on the basis of
     race, color, religion, or national origin because of habit, local custom,
     or otherwise.



       (b) By the submission of this offer, the offeror certifies that it does
     not and will not maintain or provide for its employees any segregated
     facilities at any of its establishments, and that it does not and will not
     permit its employees to perform their services at any location under its'
     control where segregated facilities are maintained. The offeror agrees that
     a breach of this certification is a violation of the Equal Opportunity
     clause in the contract.

       (c) The offeror further agrees that (except where it has obtained
     identical certifications from proposed subcontractors for specific time
     periods) it will--

          (1) Obtain identical certificates from proposed subcontractors before
        the award of subcontracts under which the subcontractor will be subject
        to the Equal Opportunity clause;

          (2)  Retain the certifications in the files; and

          (3) Forward the following notice to the proposed subcontractors
        (except if the proposed subcontractors have submitted identical
        certifications for specific time periods):

        NOTICE TO PROSPECTIVE SUBCONTRACTORS OF REQUIREMENT FOR CERTIFICATIONS
        OF NONSEGREGATED FACILITIES.

        A Certification of Nonsegregated Facilities must be submitted before the
     award of a subcontractor under which the subcontractor will be subject to
     the Equal Opportunity clause. The certification may be submitted either for
     each subcontractor or for all subcontractors.

                                   00600-10
<PAGE>
 
     during a period (i.e., quarterly, semiannually, or annually). NOTE: The 
     penalty for making false statements in offers is prescribed in 18 U.S.C.
     1001.

                              (End of provision)

                       (R 7-2003.14(b)(1) (A) 1970 AUG)

                               (R 1-12.803-10(d))

11   52.222-22      PREVIOUS CONTRACTS AND COMPLIANCE REPORTS (APR 1984)
     
     The offeror represents that--

       (a) It [X]* has, [_] has not, participated in a previous contract or 
               -
     subcontract subject either to the Equal Opportunity clause of this
     solicitation, the clause originally contained in Section 310 of Executive
     Order No. 10925, or the clause contained in Section 201 of Executive Order
     No. 11114;

       (b) It [X]* has, [_] has not, filed all required compliance reports: and 
               -

       (c) Representations indicating submission of required compliance reports,
     signed by proposed subcontractors, will be obtained before subcontract
     awards.

                              (End of provision)

                        (R 7-2003.14(b)(B),(1) 1973 APR)


12   52.233-1       CLEAN AIR AND WATER CERTIFICATION (APR 1984)

       The Offeror certifies that--

       (a) Any facility to be used in the performance of this proposed contract 
     is [_] is not [X] listed on the Environmental Protection Agency (EPA) List
                    -
     of Violating Facilities;

       (b) The Offeror will immediately notify the Contracting Officer, before 
     award, of the receipt of any communication from the Administrator, or a
     designee, of the EPA, indicating that any facility that the Offeror
     proposes to use for the performance of the contract is under consideration
     to be listed on the EPA List of Violating Facilities; and

       (c) The Offeror will include a certification substantially the same as 
     this certification, including this paragraph (c), in every nonexempt 
     subcontract.

                              (End of provision)

                            (AV 7-2003.71 1977 JUN)

                                (AV 1-1.2302-1)

*NOTE: Pier 400 Constructors is an entity with no employees. Both "Great Lakes 
Dredge & Dock Company" and "Connolly-Pacific Co." respond in an affirmative 
fashion to the representation.

                                   00600-11

<PAGE>
 
13   52.223-13      CERTIFICATION OF TOXIC CHEMICAL RELEASE REPORTING (OCT 1996)

          (a) Submission of this certification is a prerequisite for making or
     entering into this contract imposed by Executive Order 12969, August 8,
     1995.

          (b) By signing this offer, the offeror certifies that ----

             (1) As the owner or operator of facilities that will be used in the
          performance of this contract that are subject to the filing and
          reporting requirements described in section 313 of the Emergency
          Planning and Community Right-to-Know Act of 1986 (EPCRA) (42 U.S.C.
          11023) and section 6607 of the Pollution Prevention Act of 1990 (PPA)
          (42 U.S.C. 13106), the offeror will file and continue to file for such
          facilities for the life of the contract the Toxic Chemical Release
          Inventory Form (form R) as described in sections 313 (a) and (g) of
          EPCRA and section 6607 of PPA; or

             (2) None of its owned or operated facilities to be used in the
          performance of this contract is subject to the Form R filing and
          reporting requirements because each such facility is exempt for at
          least one of the following reasons: (Check each block that is
          applicable.)

          [X]    (i)   The facility does not manufacture, process, or otherwise
               use any toxic chemicals listed under section 313(c) of EPCRA, 42
               U.S.C. 11023(e), 
                    
          [X]    (ii)  The facility does not have 10 or more full-time employees
               as specified in section 313(b) (1) (A) of EPCRA, 42 U.S.C. 11023
               (b) (1) (A): 

          [X]    (iii) The facility does not meet the reporting thresholds of
               toxic chemicals established under section 313(f) of EPCRA, 42
               U.S.C. 11023(f) (including the alternate thresholds at 40 CFR
               372.27, provided an appropriate certification form has been filed
               with EPA);

          [X]    (iv)  The facility does not fail within standard Industrial
               Classification Code (SIC) designations 20 through 39 as set forth
               in Section 19.102 of the Federal Acquisition Regulation; or

          [_]    (v)   The facility is not located within any State of the
               United States, the District of Columbia, the Commonwealth of
               Puerto Rico, Guam, American Samea, the United States Virgin
               Islands, the Northern Mariana Islands, or any other territory or
               possession over which the United States has jurisdiction.
                   
                              (End of provision)

                                     00600-12                         
<PAGE>
 
14   252.204-7001   COMMERCIAL AND GOVERNMENT ENTITY (CAGE) CODE REPORTING (DEC
                    1991)

          (a)  The Offeror is requested to enter its CAGE code on its offer in 
     the block with its name and address. The CAGE code entered must be for 
     that name and address. Enter CAGE before the number.

          (b)  If the Offeror does not have a CAGE code, it may ask the 
     Contracting Officer to request one from the Defense Logistics Services
     Center (DLSC). The Contracting Officer will--

               (1)  Ask the Contractor to complete section 8 of a DD Form 2051, 
          Request for Assignment of a Commercial and Government Entity (CAGE) 
          Code;

               (2)  Complete section A and forward the form to DLSC; and 

               (3)  Notify the Contractor of its assigned CAGE code.

          (c)  Do not delay submission of the offer pending receipt of a CAGE 
     code.
                                   
                              (End of provision)


15   252.209-7001   DISCLOSURE OF OWNERSHIP OR CONTROL BY THE GOVERNMENT OF A 
                    TERRORIST COUNTRY (SEP 1994)

          (a)  Definitions.

               As used in this provision--

               (1)  "Government of a terrorist country" includes the state and 
          the government of a terrorist country, as well as any political 
          subdivision, agency, or instrumentality thereof.

               (2)  "Terrorist country" means a country determined by the 
          Secretary of State, under section 6(j)(1)(A) of the Export 
          Administration Act of 1979 (50 U.S.C. App. 2405(j)(1)(A)), to be a 
          country the government of which has repeatedly provided support for
          acts of international terrorism. As of the date of this provision,
          terrorist countries include: Cuba, Iran, Iraq, Libya, North Korea,
          Sudan, and Syria.

               (3)  "Significant interest" means--

                    (i)   Ownership of or beneficial interest in 5 percent or 
               more of the firm's or subsidiary's securities. Beneficial
               interest includes holding 5 percent or more of any class of the
               firm's securities in "nominee shares," "street names," or some
               other method of holding securities that does not disclose the
               beneficial owner;

                    (ii)  Holding a management position in the firm, such as a 
               director or officer;

                    (iii) Ability to control or influence the election, 
               appointment, or tenure of directors or officers in the firm;

                    (iv)  Ownership of 10 percent or more of the assets of a 
               firm such as


                                   00600-13
<PAGE>
 
               equipment, buildings, real estate, or other tangible assets of
               the firm; or

               (v)  Holding 50 percent or more of the indebtedness of a firm.

          (b)  Prohibited on award.

          In accordance with 10 U.S.C. 2327, no contract may be awarded to a 
     firm or a subsidiary of a firm if the government of a terrorist country has
     a significant interest in the firm or subsidiary, unless a waiver is
     granted by the Secretary of Defense.

          (c)  Disclosure.

          If the government of a terrorist country has a significant interest in
     the Offeror or a subsidiary of the Offeror, the Offeror shall disclose such
     interest in an attachment to its offer. If the Offeror is a subsidiary, it
     shall also disclose any significant interest the government of a terrorist
     country has in any firm that owns or controls the subsidiary. The
     disclosure shall include--

               (1)  Identification of each government holding a significant 
          interest; and

               (2)  A description of the significant interest held by each 
          government.

                              (End of provision)

16   252.209-2003     DISCLOSURE OF COMMERCIAL TRANSACTIONS WITH GOVERNMENT OF A
                      TERRORIST COUNTRY (SEPT 1994)

          (a)  Definitions.
          
          "Government of a terrorist country" and "terrorist country" are 
     defined in the Reporting of Commercial Transactions with the Government of
     a Terrorist Country clause of this solicitation.

          (b)  Disclosure.
     
               (1)  Section 843 of the National Defence Authorization Act for 
          Fiscal Year 1994 (Pub. L. 103-160) requires offerors to disclose
          commercial transactions conducted with the government of a terrorist
          country. If this offer exceeds 55,000,000, and if the Offeror has
          conducted such transactions, the Offeror shall disclose, in an
          attachment to its offer, each commercial transaction that it has
          conducted with the government of a terrorist country since February
          28, 1994. The disclosure shall include--

                    (i)  Identification of the government with which each 
               transaction was conducted; and

                    (ii) The nature of each transaction.

               (2)  This disclosure requirement does not apply to--

                                   00600-14
<PAGE>
 
               (i)  Transactions conducted by affiliates or subsidiaries of the 
          Offeror; or

               (ii) Payment or receipt of payment of a judgment or award ordered
          by a court or arbitral tribunal of competent jurisdiction.

                              (End of provision)



     17   252.219-7000   SMALL DISADVANTAGED BUSINESS CONCERN REPRESENTATION 
                         (DoD CONTRACTS) (JAN 1997)


               (a)  Definition. "Small disadvantaged business concern," as used 
          in this provision, means a small business concern, owned and
          controlled by individuals who are both socially and economically
          disadvantaged, as defined by the Small Business Administration at 13
          CFR Part 124, the majority of earnings of which directly accrue to
          such individuals. This term also means a small business concern owned
          and controlled by an economically disadvantaged Indian tribe or Native
          Hawaiian organization which meets the requirements of 13 CFR 124.112
          or 13 CFR 124.113, respectively. In general, 13 CFR part 124 describes
          a small disadvantaged business concern as a small business concern--

                 (1)  Which is at least 51 percent unconditionally owned by one
            or more socially and economically disadvantaged individuals; or

                 (2)  In the case of any publicly owned business, at least 51
            percent of the voting stock is unconditionally owned by one or
            more socially and economically disadvantaged individuals; and

                 (3)  Whose management and daily business operations are 
            controlled by one or more such individuals.

            (b)  Representations.  Check the category in which your ownership
            falls--

          ____ Subcontinent Asian (Asian-Indian) American (U.S. citizen with 
            origins from India, Pakistan, Bangladesh, Sri Lanka, Bhutan, or
            Nepal)

          ____ Asian-Pacific American (U.S. citizen with origins from Japan, 
            China, the Philippines, Vietnam, Korea, Sapoa, Guam, U.S Trust
            Territory of the Pacific Islands (Republic of Palsu), the Northern
            Mariana Islands, Laos, Kampuchea (Cambodia), Taiwan, Burma,
            Thailand, Malaysia, Indonesia, Singapore, Brunel, Republic of the
            Marshall Islands, or the Federated States of Micronesia)

          ____ Black American (U.S. Citizen)

          ____ Hispanic American (U.S. citizen with origins from South America, 
            Central America, Mexico, Cuba, and the Dominican Republic, Puerto
            Rico, Spain, or Portugal)

          ____ Native American (American Indians, Eskimos, Aleuts, or Native

                                   00600-15
<PAGE>
 
            Hawaiians, including Indian tribes or Native Hawaiian organizations)
          ____ Individual/concern, other than one of the preceding, currently 
            certified for participation in the Minority Small Business and
            Capital Ownership Development Program under Section 8(a) of the
            Small Business Act.

          ____ Other

            (c)  Complete the following--

               (1)  The Offeror is ____ is not  X  a small disadvantaged 
                                               --- 
            business concern

               (2)  The Small Business Administration (SBA) has _____ has not
          ____ made a determination concerning the offeror's status as a small
            disadvantaged business concern. If the SBA has made a determination,
            the date of the determination was __________ and the offeror--

          ____ Was found by SBA to be socially and economically disadvantaged 
            and no circumstances have changed to vary that determination. 

          ____ Was found by SBA not to be socially and economically
            disadvantaged but circumstances which caused the determination have
            changed.

             (d)  Penalties and Remedies. Anyone who misrepresents the status of
          a concern as a small disadvantaged business for the purpose of
          securing a contract or subcontract shall--

               (1)  Be punished by imposition of fine, imprisonment or both

               (2)  Be subject to administrative remedies, including suspension 
            and debarment; and

               (3)  Be ineligible for participation in programs conducted under 
            authority of the Small Business Act.

                              (End of provision)



     18   252.225-7006   BUY AMERICAN ACT--TRADE AGREEMENTS--BALANCE OF PAYMENTS
                         PROGRAM CERTIFICATE (JAN 1994)

               (a)  Definitions.  "Caribbean Basin country end product," 
          "designated country and product," "domestic and product," "NAFTA
          country end product," "nondesignated country end product" "qualifying
          country end product," and "U.S. made end product" have the meaning
          given in the Trade Agreements or Buy American Act and Balance of
          Payments Program clauses of this solicitation.

               (b)  Evaluation.  Offers will be evaluated by giving preference 
          to U.S. made end products, qualifying country and products, designated
          country end products, NAFTA country end products, and Caribbean Basin
          country and products over other end products.

                                   00600-16
<PAGE>
 
(c) Certifications.

  (1) The Offeror certifies that--

    (i)  Each end product, except the end products listed in paragraph  
  (c) (2) of this provision, is a domestic end product (as defined in the Buy 
  American Act and Balance of Payments Program clause of this solicitation):  
  and

    (ii) Components of unknown origin are considered to have been mined, 
  produced, or manufactured outside the United States or a qualifying country.

  (2) The Offeror must identify and certify all end products that are not 
domestic end products.

    (i) The Offeror certifies that the following supplies qualify as U.S. made 
  end products but do not meet the definition of domestic end product:

  _________________________
  (insert line item number)

    (ii)   The Offeror certifies that the following supplies are qualifying
  country end products:

  _________________________                         __________________________
  (insert line item number)                         (insert country of origin)
 
    (iii)  The Offeror certifies that the following supplies qualifying as 
  designated country end products:

  _________________________                         __________________________ 
  (insert line item number)                         (insert country of origin) 

    (iv)   The Offeror certifies that the following supplies qualify as 
  Caribbean Basin country end products:

  _________________________                         __________________________
  (insert line item number)                         (insert country of origin)

    (v)    The Offeror certifies that the following supplies qualifies as  
  NAFTA country end products:

  _________________________                         __________________________  
  (insert line item number)                         (insert country of origin)


    (vi)   The Offeror certifies that the following supplies are other 
  nondesignated country end products.

  _________________________                         __________________________
  (insert line item number)                         (insert country of origin)

                                   00600-17
<PAGE>
 
                              [End of Provision]


19    252.225-7035   BUY AMERICAN ACT--NORTH AMERICAN FREE TRADE AGREEMENT 
                     IMPLEMENTATION ACT--BALANCE OF PAYMENTS PROGRAM CERTIFICATE
                     (MAY 1995)

        (a)  Definitions.  "Domestic end Product," "qualifying country 
      end product," and U.S. made end product" have the meanings given 
      in the North American Free Trade Agreement Implementation Act or
      Buy American Act and Balance of Payments Program clauses of this
      solicitation.

        (b)  Evaluation. Offers will be evaluated by giving preference
      to U.S. made end products, qualifying country end products, or 
      NAFTA country end products over other end products.

        (c)  Certifications.  (1) The Offeror certifies that --

             (i)   Each end product, except the end products listed in 
           paragraph (c) (2) of this provision, is a domestic end
           product (as defined in the Buy American Act and Balance of 
           Payments Program clause of this solicitation); and

             (ii)  Components of unknown origin are considered to have
           been mined, produced, or manufactured outside the United
           States or a qualifying country.

           (2) The Offeror must identify and certify all end products
        that are not domestic end products.

             (i)   The Offeror certifies that the following supplies 
           qualify as "U.S. made end products" but do not meet the 
           definition of "domestic end products":

             ----------------------------
             (insert line item number)

             (ii)  The Offeror certifies that the following supplies are
           qualifying country (except Canada) end products:

             ----------------------------   ---------------------------
             (insert line item number)      (insert country of origin)

             (iii) the Offeror certifies that the following supplies 
           qualify as NAFTA country end products:

             ----------------------------   ---------------------------
             (insert line item number)      (insert country of origin)

             (iv)  The Offeror certifies that the following supplies
           are other non-NAFTA country end products:

                                   00600-18
<PAGE>
 
          __________________________           __________________________
          (insert line item number)            (insert country of origin)

                              (End of provision)


20   252.247-7022   REPRESENTATION OF EXTENT OF TRANSPORTATION BY SEA (AUG 1992)

          (a) The Offeror shall indicate by checking the appropriate blank in 
     paragraph (b) of this provision whether transportation of supplies by sea
     is anticipated under the resultant contract. The term "supplies" is defined
     in the Transportation of Supplies by Sea clause of this solicitation.

          (b) Representation. The Offeror represents that it--

     ______   Does anticipate that supplies will be transported by sea in the 
          performance of any contract or subcontract resulting from this
          solicitation.

       X      Does not anticipate that supplies will be transported by sea in
     ------
          the performance of any contract or subcontract resulting from this
          solicitation.

          (c) Any contract resulting from this solicitation will include
     the Transportation of Supplies by Sea clause. If the Offeror represents
     that it will not use ocean transportation, the resulting contract will also
     include the Defense FAR Supplement clause at 252.247-7024. Notification of
     Transportation of Supplies by Sea.

                              (End of provision)

                                               END OF SECTION 00600

                                   00600-19
<PAGE>
 
                               TABLE OF CONTENTS

                                 SECTION 00700

                               CONTRACT CLAUSES

<TABLE> 
<CAPTION> 
PARAGRAPH    CLAUSE         TITLE                                                                              PAGE
<S>          <C>            <C>                                                                                <C> 
 1           52.252-2       CLAUSES INCORPORATED BY REFERENCE (JUN 1988)                                       00700-1
 
 2           52.202-1 I     DEFINITIONS (OCT 1995)--ALTERNATE I (APR 1984)                                     00700-1
 
 3           52.203-3       GRATUITIES (APR 1984)                                                              00700-2
 
 4           52.203-5       COVENANT AGAINST CONTINGENT FEES (APR 1984)                                        00700-2
 
 5           52.203-7       ANTI-KICKBACK PROCEDURES (JUL 1995)                                                00700-3
 
 6           52.203-10      PRICE OR FEE ADJUSTMENT FOR ILLEGAL OR IMPROPER ACTIVITY (JAN 1997)                00700-5
 
 7           52.203-12      LIMITATION ON PAYMENTS TO INFLUENCE CERTAIN FEDERAL TRANSACTIONS (JAN 1990)        00700-6
 
 8           52.204-4       PRINTING/COPYING DOUBLE-SIDED ON RECYCLED PAPER (JUN 1996)                         00700-12
 
 9           52.209-6       PROTECTING THE GOVERNMENT'S INTEREST WHEN SUBCONTRACTING WITH CONTRACTOR           00700-12
                            DEBARRED, SUSPENDED, OR PROPOSED FOR DEBARMENT (JUL 1995)

10           52.214-26      AUDIT AND RECORDS--SEALED BIDDING (OCT 1995)                                       00700-13

11           52.214-27      PRICE REDUCTION FOR DEFECTIVE COST OR PRICING DATA--MODIFICATIONS--                00700-14
                            SEALED BIDDING (OCT 1995)  

12           52.214-28      SUBCONTRACTOR COST OR PRICING DATE--MODIFICATIONS--SEALED BIDDING (OCT 1995)       00700-16

13           52.219-8       UTILIZATION OF SMALL, SMALL DISADVANTAGED AND WOMEN-OWNED SMALL                    00700-17
                            BUSINESS CONCERNS (OCT 1995)

14           52.219-9 I     SMALL, SMALL DISADVANTAGED AND WOMEN-OWNED SMALL BUSINESS SUBCONTRACTING           00700-18
                            PLAN (AUG 1996)--ALTERNATE I (OCT 1995) 

15           52.219-16      LIQUIDATED DAMAGES--SUBCONTRACTING PLAN (OCT 1995)                                 00700-22

16           52.222-3       CONVICT LABOR (AUG 1996)                                                           00700-24
</TABLE> 

                                       i
<PAGE>
 
                                 SECTION 00700

                               CONTRACT CLAUSES

<TABLE> 
<S>          <C>            <C>                                                                                <C> 
17           52.222-4       CONTRACT WORK HOURS AND SAFETY STANDARDS ACT--OVERTIME COMPENSATION                00700-24
                            (JUL 1995)

18           52.222-6       DAVIS-BACON ACT (FEB 1995)                                                         00700-25

19           52.222-7       WITHHOLDING OF FUNDS (FEB 1988)                                                    00700-28

20           52.222-8       PAYROLLS AND BASIC RECORDS (FEB 1988)                                              00700-25

21           52.222-9       APPRENTICES AND TRAINEES (FEB 1988)                                                00700-31

22           52.222-10      COMPLIANCE WITH COPELAND ACT REQUIREMENTS (FEB 1988)                               00700-32

23           52.222-11      SUBCONTRACTS (LABOR STANDARDS) (FEB 1988)                                          00700-33

24           52.222-12      CONTRACT TERMINATION--DEBARMENT (FEB 1988)                                         00700-33

25           52.222-13      COMPLIANCE WITH DAVIS-BACON AND RELATED ACT REGULATONS (FEB 1988)                  00700-34

26           52.222-14      DISPUTES CONCERNING LABOR STANDARDS (FEB 1988)                                     00700-34

27           52.222-15      CERTIFICATION OF ELIGIBILITY (FEB 1988)                                            00700-34

28           52.222-26      EQUAL OPPORTUNITY (APR 1984)                                                       00700-34

29           52.222-27      AFFIRMATIVE ACTION COMPLIANCE REQUIREMENTS FOR CONSTRUCTION (APR 1984)             00700-36

30           52.222-35      AFFIRMATIVE ACTION FOR SPECIAL DISABLED AND VIETNAM ERA VETERANS (APR 1984)        00700-42

31           52.222-36      AFFIRMATIVE ACTION FOR HANDICAPPED WORKERS (APR 1984)                              00700-45

32           52.222-37      EMPLOYMENT REPORTS ON SPECIAL DISABLED VETERANS AND VETERANS OF THE                00700-46
                            VIETNAM ERA (JAN 1966)                                                             

33           52.223-2       CLEAN AIR AND WATER (APR 1984)                                                     00700-47

34           52.223-6       DRUG-FREE WORKPLACE (JAN 1987)                                                     00700-49

35           52.223-14      TOXIC CHEMICAL RELEASE REPORTING (OCT 1996)                                        00700-51
</TABLE> 

                                      ii

<PAGE>
 
                                 SECTION 00700

                               CONTRACT CLAUSES

<TABLE> 
<CAPTION> 
<S>                      <C>                      <C>                                                                   <C> 
36                       52.225-5                 BUY AMERICAN ACT--CONSTRUCTION MATERIALS (MAY 1992)                   00700-52

37                       52.225-11                RESTRICTIONS ON CERTAIN FOREIGN PURCHASES (OCT 1996)                  00700-53

38                       52.225-15                BUY AMERICAN ACT-- CONSTRUCTION MATERIALS UNDER TRADE AGREEMENTS ACT  00700-53
                                                  AND NORTH AMERICAN FREE TRADE AGREEMENT (JAN 1996)

39                       52.226-1                 UTILIZATION OF INDIAN ORGANIZATIONS AND INDIAN-OWNED ECONOMIC         00700-55
                                                  ENTERPRISE (SEP 1996)

40                       52.227-1                 AUTHORIZATION AND CONSENT (JUL 1995)                                  00700-56

41                       52.227-2                 NOTICE AND ASSISTANCE REGARDING PATENT AND COPYRIGHT INPRINGEMENT     00700-57
                                                  (AUG 1996)

42                       52.227-4                 PATENT INDEMNITY-- CONSTRUCTION CONTRACTS (APR 1984)                  00700-58

43                       52.227-11                PATENT RIGHTS-- RETENTION BY THE CONTRACTOR (SHORT FORM) (JUN 1989)   00700-58

44                       52.227-12                PATENT RIGHTS-- RETENTION BY THE CONTRACTOR (LONG FORM) (JAN 1997)    00700-64

45                       52.228-2                 ADDITIONAL BOND SECURITY (JUN 1996)                                   00700-73

46                       52.228-11                PLEDGES OF ASSETS (FEB 1992)                                          00700-74

47                       52.229-3                 FEDERAL, STATE, AND LOCAL TAXES (JAN 1991)                            00700-75

48                       52.229-5                 TAXES-- CONTRACTS PERFORMED IN U.S. POSSESSIONS OR PUERTO RICO (APR   00700-76
                                                  1984)

49                       52.232-5                 PAYMENTS UNDER FIXED- PRICE CONSTRUCTION CONTRACTS (APR 1989)         00700-76

50                       52.232-19                INTEREST (JUN 1996)                                                   00700-79

51                       52.232-23                ASSIGNMENT OF CLAIMS (JAN 1986)                                       00700-79

52                       52.232-27                PROMPT PAYMENT FOR CONSTRUCTIONS CONTRACTS (MAR 1994)                 00700-80

53                       52.233-1                 DISPUTES (OCT 1995)                                                   00700-88
</TABLE> 

                                      iii

<PAGE>
 
                                 SECTION 00700

                               CONTRACT CLAUSES

<TABLE> 
<CAPTION> 
<S>                           <C>                      <C>                                                        <C> 
54                            52.233-3                 PROTEST AFTER AWARD (AUG 1996)                              00700-90

55                            52.236-2                 DIFFERING SITE CONDITIONS (APR 1984)                        00700-91

56                            52.236-3                 SITE INVESTIGATION AND CONDITIONS AFFECTING THE WORK        00700-92
                                                       (APR 1984)

57                            52.236-5                 MATERIAL AND WORKMANSHIP (APR 1984)                         00700-93

58                            52.236-6                 SUPERINTENDENCE BY THE CONTRACTOR (APR 1984)                00700-93

59                            52.236-7                 PERMITS AND RESPONSIBILITIES (NOV 1991)                     00700-94

60                            52.236-8                 OTHER CONTRACTS (APR 1984)                                  00700-94

61                            52.236-9                 PROTECTION OF EXISTING VEGETATION, STRUCTURES, EQUIPMENT    00700-94
                                                       UTILITIES, AND IMPROVEMENTS (APR 1984)

62                            52.236-10                OPERATIONS AND STORAGE AREAS (APR 1984)                     00700-95

63                            52.236-11                USE AND POSSESSION PRIOR TO COMPLETION (APR 1984)           00700-95

64                            52.236-12                CLEANING UP (APR 1984)                                      00700-95

65                            52.236-13 I              ACCIDENT PREVENTION (NOV 1991)-- ALTERNATE I (NOV 1991)     00700-97

66                            52.236-15                SCHEDULES FOR CONSTRUCTION CONTRACTS (APR 1984)             00700-98

67                            52.236-17                LAYOUT OF WORK (APR 1984)                                   00700-99

68                            52.236-21 I              SPECIFICATIONS AND DRAWINGS FOR CONSTRUCTION (FEB 1997)--   00700-99
                                                       ALTERNATE I (APR 1984)

69                            52.236-26                PRECONSTRUCTION CONFERENCE (FEB 1996)                       00700-101

70                            52.242-13                BANKRUPTCY (JUL 1995)                                       00700-101

71                            52.242-14                SUSPENSION OF WORK (APR 1984)                               00700-102

72                            52.243-4                 CHANGES (AUG 1987)                                          00700-102

73                            52.244-1                 SUBCONTRACTS (FIXED-PRICE CONTRACTS) (FEB 1995)             00700-103
</TABLE> 

                                      iv
<PAGE>
 
                                 SECTION 00700

                               CONTRACT CLAUSES
<TABLE> 
<CAPTION> 
<S>       <C>            <C>                                                                        <C> 
74        52.246-12      INSPECTION OF CONSTRUCTION (AUG 1996)                                      00700-105

75        52.246-21      WARRANTY OF CONSTRUCTION (MAR 1994)                                        00700-107

76        52.248-3 I     VALUE ENGINEERING--CONSTRUCTION (MAR 1989)--ALTERNATE I (APR 1984)         00700-108

77        52.249-2 I     TERMINATION FOR CONVENIENCE OF THE GOVERNMENT (FIXED-PRICE) (SEP 1996)--   00700-111
                         ALTERNATE I (SEP 1996)

78        52.249-10      DEFAULT (FIXED-PRICE CONSTRUCTION) (APR 1984)                              00700-116

79        52.252-6       AUTHORIZED DEVIATIONS IN CLAUSES (APR 1984)                                00700-117

80        52.253-1       COMPUTER GENERATED FORMS (JAN 1991)                                        00700-117

81        252.201-7000   CONTRACTING OFFICER'S REPRESENTATIVE (DEC 1991)                            00700-118

82        252.203-7001   SPECIAL PROHIBITION ON EMPLOYMENT (NOV 1995)                               00700-118

83        252.203-7002   DISPLAY OF DOD HOTLINE POSTER (DEC 1991)                                   00700-119

84        252.204-7000   DISCLOSURE OF INFORMATION (DEC 1991)                                       00700-120

85        252.204-7003   CONTROL OF GOVERNMENT PERSONNEL WORK PRODUCT (APR 1992)                    00700-120

86        252.205-7000   PROVISION OF INFORMATION TO COOPERATIVE AGREEMENT HOLDERS (DEC 1991)       00700-121

87        252.209-7000   ACQUISITION FROM SUBCONTRACTORS SUBJECT TO ON-SITE INSPECTION UNDER THE    00700-121
                         INTERMEDIATE-RANGE NUCLEAR FORCES (INF) TREATY (NOV 1995)

88        252.209-7004   REPORTING OF COMMERCIAL TRANSACTIONS WITH THE GOVERNMENT OF A TERRORIST   00700-121
                         COUNTRY (SEP 1994)

89        252.219-7003   SMALL, SMALL DISADVANTAGED AND WOMEN-OWNED SMALL BUSINESS SUBCONTRACTING   00700-123
                         PLAN (DOD CONTRACTS) (APR 1996)

90        252.223-7004   DRUG-FREE WORK FORCE (SEP 1988)                                            00700-124

91        252.225-7007   TRADE AGREEMENTS (JUL 1996)                                                00700-126
</TABLE> 
         
                                       v
<PAGE>
 
                                 SECTION 00700

                               CONTRACT CLAUSES


<TABLE> 
<S>            <C>                <C>                                                           <C> 
 92            252.225-7012       PREFERENCE FOR CERTAIN DOMESTIC COMMODITIES (NOV 1995)        00700-129            
                                                                                                                     
 93            252.225-7026       REPORTING OF CONTRACT PERFORMANCE OUTSIDE THE UNITED STATES                        
                                  (NOV 1995)                                                    00700-130            
                                                                                                                     
 94            252.225-7031       SECONDARY ARAB BOYCOTT OF ISRAEL (JUN 1992)                   00700-131            
                                                                                                                     
 95            252.225-7036       NORTH AMERICAN FREE TRADE AGREEMENT IMPLEMENTATION ACT                             
                                  (JAN 1994)                                                    00700-132            
                                                                                                                     
 96            252.227-7000       NON-ESTOPPEL (OCT 1966)                                       00700-133            
                                                                                                                     
 97            252.227-7022       GOVERNMENT RIGHTS (UNLIMITED) (MAR 1979)                      00700-134            
                                                                                                                     
 98            252.227-7023       DRAWINGS AND OTHER DATA TO BECOME PROPERTY OF GOVERNMENT                           
                                  (MAR 1979)                                                    00700-134            
                                                                                                                     
 99            252.227-7033       RIGHTS IN SHOP DRAWINGS (APR 1966)                            00700-134            
                                                                                                                     
100            252.231-7000       SUPPLEMENTAL COST PRINCIPLES (DEC 1991)                       00700-135           
                                                                                                                    
101            252.232-7006       REDUCTION OR SUSPENSION OF CONTRACT PAYMENTS UPON                                 
                                  FINDING OR FRAUD (AUG 1992)                                   00700-135           
                                                                                                                    
102            252.236-7000       MODIFICATION PROPOSALS--PRICE BREAKDOWN (DEC 1991)            00700-135           
                                                                                                                    
103            252.236-7008       CONTRACT PRICES--BIDDING SCHEDULES (DEC 1991)                 00700-136           
                                                                                                                    
104            252.242-7000       POSTAWARD CONFERENCE (DEC 1991)                               00700-136           
                                                                                                                    
105            252.243-7001       PRICING OF CONTRACT MODIFICATIONS (DEC 1991)                  00700-136           
                                                                                                                    
106            252.247-7024       MODIFICATION OF TRANSPORTATION OF SUPPLIES BY SEA (NOV 1995)  00700-137          
                                                                                                                    
107            52.252-4           ALTERNATIONS IN CONTRACT                                                          
</TABLE> 

                                      vi
<PAGE>
 
                                 SECTION 00700
 
                              CONTRACT CLAUSES

1    52.252-2       CLAUSES INCORPORATED BY REFERENCE (JUN 1988)

          This contract incorporates one or more clauses by reference, with the
     same force and effect as if they were given in full text. Upon request, the
     Contracting Officer will make their full text available.

                                (End of clause)

2    52.202-1 I     DEFINITIONS (OCT 1995) -- ALTERNATE I (APR 1984)

          (a)  "Head of the agency" (also called "agency head") or "Secretary"
     means the Secretary (or Attorney General, Administrator, Governor,
     Chairperson, or other chief official, as appropriate) of the agency,
     including any deputy or assistant chief official of the agency; and the
     term "authorized representative" means any person, persons, or board (other
     than the Contracting Officer) authorized to act for the head of the
     agency or Secretary.

          (b)  Commercial component means any component that is a commercial 
     item. 

          (c)  Component means any item supplied to the Federal Government as 
     part of an end item or of another component.

          (d)  Nondevelopmental item means --

               (1)  Any previously developed item of supply used exclusively for
          governmental purposes by a Federal agency, a State or local
          government, or a foreign government with which the United States has a
          mutual defense cooperation agreement;

               (2)  Any item described in paragraph (a) (1) of this definition
          that requires only minor modification or modifications of a type
          customarily available in the commercial marketplace in order to meet
          the requirements of the procuring department or agency; or

               (3)  Any item of supply being produced that does not meet the
          requirements of paragraph (e) (1) or (e) (2) solely because the item
          is not yet in use.

          (e)  "Contracting Officer" means a person with the authority to enter
     into, administer, and/or terminate contracts and make related
     determinations and findings. The term includes certain authorized
     representatives of the Contracting Officer acting within the limits of
     their authority as delegated by the Contracting Officer.
     
          (f)  Except as otherwise provided in this contract, the term
     "subcontracts" includes, but is not limited to, purchase orders and changes
     and modifications to purchase orders under this contract.

                                (End of clause)

                                    00700-1
<PAGE>
 
3    52.203-3       GRATUITIES (APR 1984)

          (a)  The right of the Contractor to proceed may be terminated by
     written notice if, after notice and hearing, the agency head or a designee
     determines that the Contractor, its agent, or another representative--

               (1) Offered or gave a gratuity (e.g., an entertainment or gift)
          to an officer, official, or employee of the Government; and

               (2) Intended, by the gratuity, to obtain a contract or favorable
          treatment under a contract.

          (b)  The facts supporting this determination may be reviewed by any 
     court having lawful jurisdiction.

          (c)  If this contract is terminated under paragraph (a) above, the 
     Government is entitled--

               (1)  To pursue the same remedies as in a breach of the contract; 
           and 

               (2)  In addition to any other damages provided by law, to
          exemplary damages of not less than 3 nor more than 10 times the cost
          incurred by the Contractor in giving gratuities to the person
          concerned, as determined by the agency head or a designee. (This
          subparagraph (c) (2) is applicable only if this contract uses money
          appropriated to the Department of Defense.)

          (d)  The rights and remedies of the Government provided in this clause
     shall not be exclusive and are in addition to any other rights and remedies
     provided by law or under this contract.
     
                                (End of clause)

                             (R 7-104.16 1952 MAR)

4    52.203-5       COVENANT AGAINST CONTINGENT FEES (APR 1954)        

          (a)  The Contractor warrants that no person or agency has been
     employed or retained to solicit or obtain this contract upon an agreement
     or understanding for a contingent fee, except a bona fide employee or
     agency. For breach or violation of this warranty, the Government shall have
     the right to annul this contract without liability or, in its discretion,
     to deduct from the contract price or consideration, or otherwise recover,
     the full amount of the contingent fee.

          (b)  "Bona fide agency," as used in this clause, means an established
     commercial or selling agency, maintained by a contractor for the purpose of
     securing business, that neither exerts nor proposes to exert improper
          
                                    00700-2
<PAGE>
 
     influence to solicit or obtain Government contracts nor holds itself out as
     being able to obtain any Government contract or contracts through improper
     influence.

       "Bona fide employee," as used in this clause, means a person, employed by
     a Contractor and subject to the Contractor's supervision and control as to
     time, place, and manner of performance, who neither exerts nor proposes to
     exert improper influence to solicit or obtain Government contracts nor
     holds out as being able to obtain any Government contract or contracts
     through improper influence.

       "Contingent fee," as used in this clause, means any commission,
     percentage, brokerage, or other fee that is contingent upon the success
     that a person or concern has in securing a Government contract.

       "Improper influence," as used in this clause, means any influence that
     induces or tends to induce a Government employee or officer to give
     consideration or to act regarding a Government contract on any basis other
     than the merits of the matter.

                                (End of clause)

                             (R 7-103.20 1968 JAN)

                                  (R 1-1.503)

                                (R 1-7.102-18)

5    52.203-7       ANTI-KICKBACK PROCEDURES (JUL 1995)

       (a)  Definitions.

       "Kickback," as used in this clause, means any money, fee, commission,
     credits, gift, gratuity, thing of value, or compensation of any kind which
     is provided, directly or indirectly, to any prime Contractor, prime
     Contractor employee, subcontractor, or subcontractor employee for the
     purpose of improperly obtaining or rewarding favorable treatment in
     connection with a prime contract or in connection with a subcontract
     relating to a prime contract.

       "Person," as used in this clause, means a corporation, partnership,
     business association of any kind, trust, joint-stock company, or
     individual.

       "Prime contract," as used in this clause, means a contract or contractual
     action entered into by the United States for the purpose of obtaining
     supplies, materials, equipment, or services of any kind.

       "Prime Contractor" as used in this clause, means a person who has entered
     into a prime contract with the United States.

       "Prime Contractor employee," as used in this clause, means any officer,

                                    00700-3
<PAGE>
 
          partner, employee, or agent of a prime Contractor.

               "Subcontract," as used in this clause, means a contract or
          contractual action entered into by a prime Contractor or subcontractor
          for the purpose of obtaining supplies, materials, equipment, or
          services of any kind under a prime contract.

               "Subcontractor," as used in this clause, (1) means any person,
          other than the prime Contractor, who offers to furnish or furnishes
          any supplies, materials, equipment, or services of any kind under a
          prime contract or a subcontract entered into in connection with such
          prime contract, and (2) includes any person who offers to furnish or
          furnishes general supplies to the prime Contractor or a higher tier
          subcontractor.

               "Subcontractor employee," as used in this clause, means any
          officer, partner, employee, or agent of a subcontractor.

               (b)  The Anti-kickback Act of 1986 (41 U.S.C. 51-58) (the Act),
          prohibits any person from--

                    (1)  Providing or attempting to provide or offering to
               provide any kickback;

                    (2)  Soliciting, accepting, or attempting to accept any
               kickback; or                    

                    (3)  Including, directly or indirectly, the amount of any
               kickback in the contract price charged by a prime Contractor to
               the United States or in the contract price charged by a
               subcontractor to a prime Contractor or higher tier subcontractor.
               
               (c) (1)   The Contractor shall have in place and follow
          reasonable procedures designed to prevent and detect possible
          violations described in paragraph (b) of this clause in its own
          operations and direct business relationships.
          
                    (2)  When the Contractor has reasonable grounds to believe
               that a violation described in paragraph (b) of this clause may
               have occurred, the Contractor shall promptly report in writing
               the possible violation. Such reports shall be made to the
               inspector general of the contracting agency, the head of the
               contracting agency if the agency does not have an inspector
               general, or the Department of Justice.
               
                    (3)  The Contractor shall cooperate fully with any Federal
               agency investigating a possible violation described in paragraph
               (b) of this clause.

                    (4)  The Contracting Officer may (i) offset the amount of
               the kickback against any monies owed by the United States under
               the prime contract and/or (ii) direct that the Prime Contractor
               withhold from sums owed a subcontractor under the prime contract
               the amount of the kickback. The Contracting Officer may order
               that monies withheld under subdivision (c) (4) (ii) of this
               clause be paid over to the Government unless the

                                    00700-4
<PAGE>
 
          Government has already offset those monies under subdivision (c) (4)
          (i) of this clause. In either case, the Prime Contractor shall notify
          the Contracting Officer when the monies are withheld.

               (5)  The Contractor agrees to incorporate the substance of this
          clause, including subparagraph (c) (5) but excepting subparagraph (c)
          (1), in all subcontracts under this contract which exceed $100,000.

                                (End of clause)

6    52.203-10    PRICE OR FEE ADJUSTMENT FOR ILLEGAL OR, IMPROPER ACTIVITY 
                  (JAN 1997)

          (a) The Government, at its election, may reduce the price of a fixed-
     price type contract and the total cost and fee under a cost-type contract
     by the amount of profit or fee determined as set forth in paragraph (b) of
     this clause if the head of the contracting activity or designee determines
     that there was violation of subsection 27 (a), (b) or (c) of the Office of
     Federal Procurement Policy Act, as amended (41 U.S.C. 423), as implemented
     in section 3.104 of the Federal Acquisition Regulation.

          (b) The price or fee reduction referred to in paragraph (a) of this 
     clause shall be--

               (1)  For cost-plus-fixed-fee contracts, the amount of the fee 
          specified in the contract at the time of award,

               (2)  For cost-plus-incentive-fee contracts, the target fee
          specified in the contract at the time of award, notwithstanding any
          minimum fee or "fee floor" specified in the contract;

               (3)  For cost-plus-award-fee contracts--

                    (i)  The base fee established in the contract at the time of
               contract award;     

                    (ii) If no base fee is specified in the contract, 30 percent
               of the amount of each award fee otherwise payable to the
               Contractor for each award fee evaluation period or at each award
               fee determination point.

               (4)  For fixed-price-incentive contracts, the Government may--

                    (i)  Reduce the contract target price and contract target
               profit both by an amount equal to the initial target profit
               specified in the contract at the time of contract award, or

                    (ii) If an immediate adjustment to the contract target price
               and contract target profit would have a significant adverse
               impact on the incentive price revision relationship under the
               contract, or adversely affect the contract financing provisions,
               the Contracting Officer may defer such adjustment until
               establishment of the total final price of

                                    00700-5
<PAGE>
 
          the contract. The total final price established in accordance with the
          incentive price revision provisions of the contract shall be reduced
          by an amount equal to the initial target profit specified in the
          contract at the time of contract award and such reduced price shall be
          the total final contract price.

          (5) For firm-fixed-price contracts, by 10 percent of the initial
     contract price or profit amount determined by the Contracting Officer from
     records or documents in existence prior to the date of the contract award.

     (c) The Government may, at its election, reduce a prime contractor's price 
   or fee in accordance with the procedures of paragraph (b) of this clause for
   violations of the Act by its subcontractors by an amount not to exceed the
   amount of profit or fee reflected in the subcontract at the time the
   subcontract was first definitively priced.

     (d) In addition to the remedies in paragraphs (a) and (c) of this clause,
   the Government may terminate this contract for default. The rights and
   remedies of the Government specified herein are not exclusive, and are in
   addition to any other rights and remedies provided by law or under this
   contract.

                                (End of clause)

7  52.203-12          LIMITATION ON PAYMENTS TO INFLUENCE CERTAIN FEDERAL 
                      TRANSACTIONS (JAN 1990)

     (a) Definitions.

     "Agency," as used in this clause, means executive agency as defined in 
   2.101.

     "Covered Federal action," as used in this clause, means any of the
   following Federal actions:

     (a) The awarding of any Federal contract. 

     (b) The making of any Federal grant.

     (c) The making of any Federal loan.

     (d) The entering into of any cooperative agreement.

     (e) The extension, continuation, renewal, amendment, or modification of any
   Federal contract, grant, loan, or cooperative agreement.

     "Indian tribe" and "tribal organization," as used in this clause, have the 
   meaning provided in section 4 of the Indian Self-Determination and Education 
   Assistance Act (25 U.S.C. 4508) and include Alaskan Natives.

     "Influencing or attempting to influence," as used in this clause, means 
   making, with the intent to influence, any communication to or appearance

                                    00700-6
<PAGE>
 
     before an officer or employee of any agency, a Member of Congress, an
     officer or employee of Congress, or an employee of a Member of Congress in
     connection with any covered Federal action.

          "Local government," as used in this clause, means a unit of
     government in a State and, if chartered, established, or otherwise
     recognized by a State for the performance of a governmental duty, including
     a local public authority, a special district, an intrastate district, a
     council of governments, a sponsor group representative organization, and
     any other instrumentality of a local government.

          "Officer or employee of an agency," as used in this clause, includes
     the following individuals who are employed by an agency:

          (a)  An individual who is appointed to a position in the Government
     under title 5, United States Code, including a position under a temporary
     appointment.

          (b)  A member of the uniformed services, as defined in subsection 101 
     (3), title 37, United States Code.

          (c)  A special Government employee, as defined in section 202, title 
     18, United States Code.

          (d)  An individual who is a member of a Federal advisory committee, as
     defined by the Federal Advisory Committee Act, title 5, United States Code,
     appendix 2.

          "Person," as used in this clause, means an individual, corporation, 
     company, association, authority, firm, partnership, society, State, and
     local government, regardless of whether such entity is operated for profit,
     or not for profit. This term excludes an Indian tribe, tribal organization,
     or any other Indian organization with respect to expenditures specifically
     permitted by other Federal law.

          "Reasonable compensation," as used in this clause, means, with respect
     to a regularly employed officer or employee of any person, compensation
     that is consistent with the normal compensation for such officer or
     employee for work that is not furnished to, not funded by, or not furnished
     in cooperation with the Federal Government.

          "Reasonable payment," as used in this clause, means, with respect to 
     professional and other technical services, a payment in an amount that is 
     consistent with the amount normally paid for such services in the private 
     sector. 

          "Recipient," as used in this clause, includes the Contractor and all 
     subcontractors. This term excludes an Indian tribe, tribal organization, or
     any other Indian organization with respect to expenditures specifically
     permitted by other Federal law.

          "Regularly employed," as used in this clause, means, with respect to 
     an 

                                    00700-7
<PAGE>
 
          officer or employee of a person requesting or receiving a Federal
          contract, an officer or employee who is employed by such person for at
          least 130 working days within 1 year immediately preceding the date of
          the submission that initiates agency consideration of such person for
          receipt of such contract. An officer or employee who is employed by
          such person for less than 130 working days within 1 year immediately
          preceding the date of the submission that initiates agency
          consideration of such person shall be considered to be regularly
          employed as soon as he or she is employed by such person for 130
          working days.

               "State," as used in this clause, means a State of the United
          States, the District of Columbia, the Commonwealth of Puerto Rico, a
          territory or possession of the United States, an agency or
          instrumentality of a State, and multi-State, regional, or interstate
          entity having governmental duties and powers.

               (b)  Prohibitions.

                  (1) Section 1352 of title 31, United States Code, among other
               things, prohibits a recipient of a Federal contract, grant, loan,
               or cooperative agreement from using appropriated funds to pay any
               person for influencing or attempting to influence an officer or
               employee of any agency, a Member of Congress, an officer or
               employee of Congress, or an employee of a Member of Congress in
               connection with any of the following covered Federal actions: the
               awarding of any Federal contract; the making of any Federal
               grant; the making of any Federal loan; the entering into of any
               cooperative agreement; or the modification of any Federal
               contract, grant, loan, or cooperative agreement.

                  (2) The Act also requires Contractors to furnish a disclosure
               if any funds other than Federal appropriated funds (including
               profit or fee received under a covered Federal transaction) have
               been paid, or will be paid, to any person for influencing or
               attempting to influence an officer or employee of any agency, a
               Member of Congress, an officer or employee of Congress, or an
               employee of a Member of Congress in connection with a Federal
               contract, grant, loan, or cooperative agreement.

                  (3) The prohibitions of the Act do not apply under the 
               following conditions:

                    (1) Agency and legislative liaison by own employees.

                       (A) The prohibition on the use of appropriated funds, in
                    subparagraph (b) (1) of this clause, does not apply in the
                    case of a payment of reasonable compensation made to an
                    officer or employee of a person requesting or receiving a
                    covered Federal action if the payment is for agency and
                    legislative liaison activities not directly related to a
                    covered Federal action.

                                    00700-8
<PAGE>
          
               (B) For purposes of subdivision (b) (3) (i) (A) of this clause,
          providing any information specifically requested by an agency or
          Congress is permitted at any time.

               (C) The following agency and legislative liaison activities are 
          permitted at any time where they are not related to a specific
          solicitation for any covered Federal action;

                  (1) Discussing with an agency the qualities and
               characteristics (including individual demonstrations) of the
               person's products or services, conditions or terms of sale, and
               service capabilities.

                  (2) Technical discussions and other activities regarding the 
               application or adaptation of the person's products or services
               for an agency's use.

               (D) The following agency and legislative liaison activities are 
          permitted where they are prior to formal solicitation of any covered
          Federal action--

                  (1)  Providing any information not specifically requested but 
               necessary for an agency to make an informed decision about
               initiation of a covered Federal action;

                  (2)  Technical discussions regarding the preparation of an 
               unsolicited proposal prior to its official submission; and 

                  (3)  Capability presentations by persons seeking awards from 
               an agency pursuant to the provisions of the Small Business Act,
               as amended by Pub. L. 95-507, and subsequent amendments.

               (E) Only those services expressly authorized by subdivision (b) 
          (3) (i) (A) of this clause are permitted under this clause.

          (ii) Professional and technical services.

               (A) The prohibition on the use of appropriated funds, in 
          subparagraph (b) (i) of this clause, does not apply in the case of --

                  (1) A payment of reasonable compensation made to an officer or
          employee of a person requesting or receiving a covered Federal action
          or an extension, continuation, renewal, amendment, or modification of
          a covered Federal action, if payment is for professional or technical
          services rendered directly in the preparation, submission, or
          negotiation of any bid, proposal, or application for that Federal
          action or for meeting requirements imposed by or pursuant to law as a
          condition for receiving that Federal action.

                  (2) Any reasonable payment to a person, other than an officer 
          or employee of a person requesting or receiving a covered Federal
          action or an extension, continuation, renewal, amendment, or
          modification of a covered Federal action if the payment is for

                                   00700-9                      
<PAGE>
 
               professional or technical services rendered directly in the
               preparation, submission, or negotiation of any bid, proposal, or
               application for that Federal action or for meeting requirements
               imposed by or pursuant to law as a condition for receiving that
               Federal action. Persons other than officers or employees of a
               person requesting or receiving a covered Federal action include
               consultants and trade associations.

               (B) For purposes of subdivision (b) (3) (ii) (A) of this clause, 
          "professional and technical services" shall be limited to advice and
          analysis directly applying any professional or technical discipline.
          For example, drafting of a legal document accompanying a bid or
          proposal by a lawyer is allowable. Similarly, technical advice
          provided by an engineer on the performance or operational capability
          of a piece of equipment rendered directly in the negotiation of a
          contract is allowable. However, communications with the intent to
          influence made by a professional (such as a licensed lawyer) or a
          technical person (such as a licensed accountant) are not allowable
          under this section unless they provide advice and analysis directly
          applying their professional or technical expertise and unless the
          advice or analysis is rendered directly and solely in the preparation,
          submission or negotiation of a covered Federal action. Thus, for
          example, communications with the intent to influence made by a lawyer
          that do not provide legal advice or analysis directly and solely
          related to the legal aspects of his or her client's proposal, but
          generally advocate one proposal over another are not allowable under
          this section because the lawyer is not providing professional legal
          services. Similarly, communications with the intent to influence made
          by an engineer providing an engineering analysis prior to the
          preparation or submission of a bid or proposal are not allowable under
          this section since the engineer is providing technical services but
          not directly in the preparation, submission or negotiation of a
          covered Federal action.

               (C) Requirements imposed by or pursuant to law as a condition for
          receiving a covered Federal award include these required by law or
          regulation and any other requirements in the actual award documents.

               (D) Only these services expressly authorized by subdivisions (b) 
          (3) (ii) (A) (1) and (2) of this clause are permitted under this
          clause.

               (E) The reporting requirements of FAR 3.803 (a) shall not apply 
          with respect to payments of reasonable compensation made to regularly
          employed officers or employees of a person.

       (c)   Disclosure.

                                   00700-10
<PAGE>
 
          (1) The Contractor who requests or receives from an agency a Federal 
     contract shall file with that agency a disclosure form, OMB standard from
     LLL, Disclosure of Lobbying Activities, if such person has made or has
     agreed to make any payment using nonappropriated funds (to include profits
     from any covered Federal action), which would be prohibited under
     subparagraph (b) (1) of this clause, if paid for with appropriated funds.

          (2) The Contractor shall file a disclosure form at the end of each 
     calendar quarter in which there occurs any event that materially affects
     the accuracy of the information contained in any disclosure form previously
     filed by such person under subparagraph (c) (1) of this clause. An event
     that materially affects the accuracy of the information reported
     includes--

             (i)   A cumulative increase of $25,000 or more in the amount paid
          or expected to be paid for influencing or attempting to influence a
          covered Federal action; or

             (ii)  A change in the person(s) or individual(s) influencing or 
          attempting to influence a covered Federal action; or

             (iii) A change in the officer(s), employee(s), or Member(s) 
          contacted to influence or attempt to influence a covered Federal
          action.

          (3) The Contractor shall require the submittal of a certification, and
     if required, a disclosure form by any person who requests or receives any
     subcontract exceeding $100,000 under the Federal contract.

          (4) All subcontractor disclosure forms (but not certifications) shall 
     be forwarded from tier to tier until received by the prime Contractor. The
     prime Contractor shall submit all disclosures to the Contracting Officer at
     the end of the calendar quarter in which the disclosure form is submitted
     by the subcontractor. Each subcontractor certification shall be retained in
     the subcontract file of the awarding Contractor.

     (d) Agreement. The Contractor agrees not to make any payment prohibited by 
this clause.

     (e) Penalties.

        (1) Any person who makes an expenditure prohibited under paragraph 
     (a) of this clause or who fails to file or amend the disclosure form to be
     filed or amended by paragraph (b) of this clause shall be subject to civil
     penalties as provided for by 31 U.S.C. 1352. An imposition of a civil
     penalty does not prevent the Government from seeking any other remedy that
     may be applicable.

        (2) Contractors may rely without liability on the representation made by
     their subcontractors in the certification and disclosure form.

                                   00700-11

<PAGE>
 
          ^(?) Cost allowability. Nothing in this clause makes allowable or
     reasonable any costs which would otherwise be unallowable or unreasonable.
     Conversely, costs made specifically unallowable by the requirements in this
     clause will not be made allowable under any other provision.

                                (End of Clause)

8    52.204-4       PRINTING/COPYING DOUBLE-SIDED ON RECYCLED PAPER (JUN 1996)

          (a) In accordance with Executive Order 12873, dated October 20, 1993, 
     as amended by Executive Order 12995, dated March 25, 2996, the
     Offeror/Contractor is encouraged to submit paper documents, such as offers,
     letters, or reports, that are printed/copied double-sided on recycled paper
     that has at least 20 percent postconsumer material.

          (b) The 20 percent standard applies to high-speed copier paper, 
     offset paper, forms bond, computer printout paper, carbonless paper, file
     folders, white woven envelopes, and other uncoated printed and writing
     paper, such as writing and office paper, book paper, cotton fiber paper,
     and cover stock. An alternative to meeting the 20 percent postconsumer
     material standard is 50 percent recovered material content of certain
     industrial by-products.

                                (End of Clause)

9    52.209-6       PROTECTING THE GOVERNMENT'S INTEREST WHEN SUBCONTRACTING
                    WITH CONTRACTORS DEBARRED, SUSPENDED, OR PROPOSED FOR
                    DEBARMENT (JUL 1995)

          (a) The Government suspends or debars Contractors to protect the 
     Government's interest. The Contractor shall not enter into any subcontract
     in excess of $25,000 with a Contractor that is debarred, suspended, or
     proposed for debarment unless there is a compelling reason to do so.

          (b) The Contractor shall require each proposed first-tier 
     subcontractor, whose subcontract will exceed $25,000, to disclose to the
     Contractor, in writing, whether as of the time of award of the subcontract,
     the subcontractor, or its principals, is or is not debarred, suspended, or
     proposed for debarment by the Federal Government.

          (c) A corporate officer or a designee of the Contractor shall notify  
     the Contracting Officer, in writing, before entering into a subcontract
     with a party that is debarred, suspended or proposed for debarment (see
 
                                   00700-12
<PAGE>
 
     FAR 9.404 for information on the List of Parties Excluded from Federal
     Procurement and Nonprocurement Programs). The notice must include the
     following:

          (1) The name of the subcontractor.

          (2) The Contractor's knowledge of the reasons for the subcontractor
       being on the List of Parties Excluded from Federal Procurement and
       Nonprocurement Programs.

          (3) The compelling reason(s) for doing business with the subcontractor
       notwithstanding its inclusion on the List of Parties Excluded from
       Federal Procurement and Nonprocurement Programs.

          (4) The systems and procedures the Contractor has established to
       ensure that it is fully protecting the Government's interests when
       dealing with such subcontractor in view of the specific basis for the
       party's debarment, suspension, or proposed debarment.

                                (End of clause)

10   52.214-26           AUDIT AND RECORDS--SEALED BIDDING (OCT 1995)

       (a) As used in this clause, records includes books, documents, accounting
     procedures and practices, and other data, regardless of type and regardless
     of whether such items are in written form, in the form of computer data, or
     in any other form.
          
       (b) Cost or pricing data. If the Contractor has been required to submit
     cost or pricing data in connection with the pricing of any modification to
     this contract, the Contracting Officer, or an authorized representative of
     the Contracting Officer, in order to evaluate the accuracy, completeness,
     and currency of the cost of pricing data, shall have the right to examine
     and audit all of the Contractor's records, including computations and
     projections, related to--

           (1) The proposal for the modification;

           (2) The discussions conducted on the proposal(s), including those
       related to negotiating;

           (3) Pricing of the modification, or
     
           (4) Performance of the modification.     

       (c) Comptroller General. In the case of pricing any modification, the
     Comptroller General of the United States, or an authorized representative,
     shall have the same rights as specified in paragraph (b) of this clause.
     
       (d) Availability. The Contractor shall make available at its office at
     all reasonable times the materials described in reproduction, until 3 years
     after final payment under this contract, or for any other period specified 

                                   00700-13
<PAGE>
 
     in Subpart 4.7 of the Federal Acquisition Regulation (FAR). FAR Subpart
     4.7, Contractor Records Retention, in effect on the data of this contract,
     is incorporated by reference in its entirety and made a part of this
     contract.

          (1)  If this contract is completely or partially terminated, the
       records relating to the work terminated shall be made available for 3
       years after any resulting final termination settlement.

          (2)  Records pertaining to appeals under the Disputes clause or to
       litigation or the settlement of claims arising under or relating to the
       performance of this contract shall be made available until disposition of
       such appeals, litigation, or claims.

       (e)  The Contractor shall insert a clause containing all the provisions
     of this clause, including this paragraph (e), in all subcontracts expected
     to exceed the threshold in FAR 15.804-2(a) (1) for submission of cost or
     pricing data.
     
                              (End of clause)   

11   52.214-27      PRICE REDUCTION FOR DEFECTIVE COST OR PRICING DATA--
                    MODIFICATIONS-- SEALED BIDDING (OCT 1995)

       (a)  This clause shall become operative only for any modification to this
     contract involving aggregate increases and/or decreases in costs, plus
     applicable profits, expected to exceed the threshold for the submission of
     cost or pricing data at FAR 15.804-2(a) (1), expect that this clause does
     not apply to a modification if an exception under FAR 15.804-1 applies.

       (b)  If any price, including profit, negotiated in connection with any
     modification under this clause, was increased by any significant amount
     because (1) the Contractor or a subcontractor furnished cost or pricing
     data that were not complete, accurate, and current as certified in its
     Certificate of Current Cost or Pricing Data, (2) a subcontractor or
     prospective subcontrator furnished the Contractor cost or pricing data that
     were not complete, accurate, and current as certified in the Contractor's
     Certificate of Current Cost or Pricing Data, or (3) any of these parties
     furnished data of any description that were not accurate, the price shall
     be reduced accordingly and the contract shall be modified to reflect the
     reduction. This right to a price reduction is limited to that resulting
     from defects in data relating to modifications for which this clause
     becomes operative under paragraph (a) above.

     (c)  Any reduction in the contract price under paragraph (b) above due to

                                   00700-14
<PAGE>
 
     defective data from a prospective subcontractor that was not subsequently 
     awarded the subcontract shall be limited to the amount, plus applicable
     overhead and profit markup, by which (1) the actual subcontract or (2) the 
     actual cost to the Contractor, if there was no subcontract, was less than 
     the prospective subcontract cost estimate submitted by the Contractor; 
     provided, that the actual subcontract price was not itself affected by 
     defective cost or pricing data.

          (d) (1)  If the Contracting Officer determines under paragraph (b) of
     this clause that a price or cost reduction should be made, the Contractor
     agrees not to raise the following matters as defence:

               (i)   The Contractor or subcontractor was a sole source supplier 
          or otherwise was in a superior bargaining position and thus the price 
          of the contract would not have been modified even if accurate, 
          complete, and current cost or pricing data had been submitted. 

               (ii)  The Contracting Officer should have known that the cost or 
          pricing data in issue were defective even though the Contractor or 
          subcontractor took no affirmative action to bring the character of the
          data to the attention of the Contracting Officer.
  
               (iii) The Contract was based on an agreement about the total cost
          of the contract and there was no agreement about the cost of each item
          procure under the contract.

               (iv)  The Contractor or subcontractor did not submit a 
          Certificate of Current Cost or Pricing Data.

          (2) (i)  Except as prohibited by subdivision (d) (2) (ii) of this 
     clause, an offset in an amount determined appropriate by the Contracting 
     Officer based upon the facts shall be allowed against the amount of a 
     contract price reduction if--

                 (A) The Contractor certifies to the Contracting Officer that, 
               to the best of the Contractor's knowledge and belief, the 
               Contractor is entitled to the offset in the amount requested; and

                 (B) The Contractor proves that the cost or pricing data were 
               available before the date of agreement on the price of the 
               contract (or price of the modification) and that the data were 
               not submitted before such date. 

               (ii)  An offset shall not be allowed if-- 

                 (A) The understated data was known by the Contractor to be 
               understated when the Certificate of Current Cost or Pricing Data
               was signed; or

                 (B) The Government proves that the facts demonstrate that the 
               contract price would not have increased in the amount to be 
               offset even if the available data had been submitted before the 
               date of

                                   00700-15

<PAGE>
 
               agreement on price.               

          (e)  If any reduction in the contract price under this clause reduces 
     the price of items for which payment was made prior to the date of the 
     modification reflecting the price reduction, the Contractor shall be 
     liable to and shall pay the United States at the time such overpayment is
     repaid-- 

               (1)  Simple interest on the amount of such overpayment to be 
          computed from the date(s) of overpayment to the Contractor to the date
          the Government is repaid by the Contractor at the applicable 
          underpayment rate effective for each quarter prescribed by the 
          Secretary of the Treasury under 26 U.S.C. 6621(a) (2); and

               (2)  A penalty equal to the amount of the overpayment, if the 
          Contractor or subcontractor knowingly submitted cost or pricing data 
          which were incomplete, inaccurate, or noncurrent.

                                (End of clause)

12   52.214-28      SUBCONTRACTOR COST OR PRICING DATA--MODIFICATIONS--SEALED 
                    BIDDING (OCT 1995)

          (a)  The requirements of paragraphs (b) and (c) of this clause shall
     (1) become operative only for any modification to this contract involving 
     aggregate increases and/or decreases in costs, plus applicable profits, 
     expected to exceed the threshold for submission of cost or pricing data at 
     FAR 15.904-2(a) (1), and (2) be limited to such modifications.

          (b)  Before awarding any subcontract expected to exceed the threshold 
     for submission of cost or pricing data at FAR 15.804-2(a) (1), on the date 
     of agreement on price or date of award, whichever is later; or before 
     pricing any subcontract modifications involving aggregate increases and/or 
     decreases in costs, plus applicable profits, expected to exceed the 
     threshold for submission of cost or pricing data at FAR 15.804-2 (a) (1),
     the Contractor shall require the subcontractor to submit cost or pricing
     data (actually or by specific identification in writing), unless an
     exception under FAR 15.804-1 applies.

          (c)  The Contractor shall require the subcontractor to certify in 
     substantially the form prescribed in subsection FAR 15.804-4 that, to the 
     best of its knowledge and belief, the data submitted under paragraph (b) 
     of this clause were accurate, complete, and current as of the date of 
     agreement on the negotiated price of the subcontract or subcontract 
     modification. 

          (d)  The Contractor shall insert the substance of this clause, 
     including 

                                   00700-16
<PAGE>
 
          this paragraph (d), in each subcontract that, when entered into,
          exceeds the threshold for submission of cost or pricing data as FAR
          15.804-2(a) (1).

                                (End of clause)


13        52.219-8       UTILIZATION OF SMALL, SMALL DISADVANTAGED AND 
                         WOMEN-OWNED SMALL BUSINESS CONCERNS (OCT 1995)

               (a)  It is the policy of the United States that small business
          concerns, small business concerns owned and controlled by socially and
          economically disadvantaged individuals and small business concerns
          owned and controlled by women shall have the maximum practicable
          opportunity to participate in performing contracts let by any Federal
          agency, including contracts and subcontracts for subsystems,
          assemblies, components, and related services for major systems. It is
          further the policy of the United States that its prime contractors
          establish procedures to ensure the timely payment of amounts due
          pursuant to the terms of their subcontracts with small business
          concerns, small business concerns owned and controlled by socially
          and economically disadvantaged individuals and small business
          concerns owned and controlled by women.

               (b) The Contractor hereby agrees to carry out this policy in the
          awarding of subcontracts to the fullest extent consistent with
          efficient contract performance. The Contractor further agrees to
          cooperate in any studies or surveys as may be conducted by the United
          States Small Business Administration or the awarding agency of the
          United States as may be necessary to determine the extent of the
          Contrator's compliance with this clause.

               (c) As used in this contract, the term "small business concern"
          shall mean a small business as defined pursuant to section 3 of the
          Small Business Act and relevant regulations promulgated pursuant
          thereto. The term "small business concern owned and controlled by
          socially and economically disadvantaged individuals" shall mean a
          small business concern (1) which is at least 51 percent
          unconditionally owned by one or more socially and economically
          disadvantaged individuals; or, in the case of any publicly owned
          business, at least 51 per centum of the stock of which is
          unconditionally owned by one or more socially and economically
          disadvantaged individuals; and (2) whose management and daily business
          operations are controlled by one or more of such individuals. This
          term also means a small business concern that is at least 51 percent
          unconditionally owned by an economically disadvantaged Indian tribe or

                                   00700-17 
<PAGE>
 
     Native Hawaiian Organization, or a publicly owned business having at least
     51 percent of its stock unconditionally owned by one of these entities
     which has its management and daily business controlled by members of an
     economically disadvantaged Indian tribe or Native Hawaiian Organization,
     and which meets the requirements of 13 CFR 124. The Contractor shall
     presume that socially and economically disadvantaged individuals include
     Black Americans, Hispanic Americans, Native Americans, Asian-pacific
     Americans, Subcontinent Asian Americans, and other minorities, or any other
     individual found to be disadvantaged by the Administration pursuant to
     section 8(a) of the Small Business Act. The Contractor shall presume that
     socially and economically disadvantaged entities also include Indian Tribes
     and Native Hawaiian Organizations.

          (d)  The term "small business concern owned and controlled by women
     shall mean a small business concern (i) which is at least 51 percent owned
     by one or more women, or, in the case of any publicly owned business, at
     least 51 percent of the stock of which is owned by one or more women, and
     (ii) whose management and daily business operations are controlled by one
     or more women; and

          (e)  Contractors acting in good faith may rely on written
     representations by their subcontractors regarding their status as a small
     business concern, a small business concern owned and controlled by socially
     and economically disadvantaged individuals or a small business concern
     owned and controlled by women.

                                (End of clause)

14   52.219-9 I     SMALL, SMALL DISADVANTAGED AND WOMEN-OWNED SMALL BUSINESS 
                    SUBCONTRACTING PLAN (AUG 1996)-- ALTERNATE I (OCT 1995)

          (a)  This clause does not apply to small business concerns.

          (b)  "Commercial product," as used in this clause, means a product is 
     regular production that is sold in substantial quantities to the general
     public and/or industry at established catalog or market prices. It ^??
     means a product which, in the opinion of the Contracting Officer, differs
     only insignificantly from the Contractor's commercial product.

          "Subcontract," as used in this clause, means any agreement (other than
     one involving an employer-employee relationship) entered into by a Federal
     Government prime Contractor or subcontractor calling for supplies or
     services required for performance of the contract or subcontract.

          (c)  The apparent low bidder, upon request by the Contracting officer,

                                   00700-18
<PAGE>
 
shall submit a subcontracting plan, where applicable, which separately addresses
subcontracting with small business concerns, with small disadvantaged business 
concerns and with women-owned small business concerns. If the bidder is 
submitting an individual contract plan, the plan must separately address 
subcontracting with small business concerns, small disadvantaged business 
concerns and women-owned small business concerns, with a separate part for the 
basic contract and separate parts for each option (if any). The plan shall be 
included in and made a part of the resultant contract. The subcontracting plan 
shall be submitted within the time specified by the Contracting Officer. Failure
to submit the subcontracting plan shall make the bidder ineligible for the award
of a contract.

     (d)  The offeror's subcontracting plan shall include the following: 

        (1) Goals, expressed in terms of percentages of total planned 
subcontracting dollars, for the use of small business concerns, small 
disadvantaged business concerns and women-owned business concerns as 
subcontractors. The offeror shall include all subcontracts that contribute to 
contract performance, and may include a proportionate share of products and 
services that are normally allocated as indirect costs.
   
        (2) A statement of --
  
           (i)   Total dollars planned to be subcontracted;

           (ii)  Total dollars planned to be subcontracted to small business 
     concerns;

           (iii) Total dollars planned to be subcontracted to small 
     disadvantaged business concerns; and

           (iv)  Total dollars planned to be subcontracted to women-owned small 
     business concerns.

        (3) A description of the principal types of supplies and services to be 
subcontracted, and an identification of the types planned for subcontracting to 
(i) small business concerns, (ii) small disadvantaged business concerns and 
(iii) women-owned small business concerns.

        (4) A description of the method used to develop the subcontracting goals
in paragraph (d)(1) of this clause.

        (5) A description of the method used to identify potential sources for 
solicitation purposes (e.g.) pre-existing company source lists, the Procurement 
Automated Source system (PASS) of the Small Business Administration, the 
National Minority Purchasing Council Vendor Information Service, the Research 
and Information Division of the Minority Business Development Agency in the 
Department of Commerce, or small, small disadvantaged and women-owned small 
business concerns trade associations). A firm may rely on the information 
contained in PASS as

                                   00700-19
<PAGE>
 
     an accurate representation of a concern's size and ownership 
     characteristics for purposes of maintaining a small business source list. A
     firm may rely on PASS as its small business source list. Use of the PASS as
     its source list does not relieve a firm of its responsibilities (e.g., 
     outreach, assistance, counseling, publicizing subcontracting opportunities)
     in this clause.

          (6)  A statement as to whether or not the offeror included indirect 
     costs in establishing subcontracting goals, and a description of the method
     used to determine the proportionate share of indirect costs to be 
     incurred with (i) small business concerns, (ii) small disadvantaged 
     business concerns, and (iii) women-owned small business concerns. 

          (7)  The name of the individual employed by the offeror who will 
     administer the offeror's subcontracting program, and a description of the 
     duties of the individual.

          (8)  A description of the efforts the offeror will make to assure that
     small, small disadvantaged and women-owned small business concerns have an 
     equitable opportunity to compete for subcontracts.

          (9)  Assurances that the offeror will include the clause in this 
     contract entitled "Utilization of Small, Small Disadvantaged and 
     Women-Owned Small Business Concerns" in all subcontracts that offer further
     subcontracting opportunities, and that the offeror will require all 
     subcontractors (except small business concerns) who receive subcontracts in
     excess of $500,000 ($1,000,000 for construction of any public facility) to 
     adopt a plan similar to the plan agreed to by the offeror.
     
          (10) Assurances that the offeror will (i) cooperate in any studies or 
     surveys as may be required, (ii) submit periodic reports in order to allow
     the Government to determine the extent of compliance by the offeror with 
     the subcontracting plan, (iii) submit Standard Form (SF) 294, 
     Subcontracting Report for Individual Contracts, and/or SP 295, Summary 
     Subcontract Report, in accordance with the instructions on the forms, and 
     (iv) ensure that its subcontractors agree to submit Standard Forms 294 and 
     295.
     
          (11) A recitation of the types of records the offeror will maintain to
     demonstrate procedures that have been adopted to comply with the 
     requirements and goals in the plan, including establishing source lists, 
     and a description of its efforts to locate small, small disadvantaged and 
     women-owned small business concerns and award subcontracts to them. The 
     records shall include at least the following (on a plant-wide or 
     company-wide basis, unless otherwise indicated).

               (i)  Source lists (e.g., PASS), guides, and other data that 
          identify

                                   00700-20
<PAGE>
 
       small, small disadvantaged and women-owned small business concerns.

          (ii)   Organizations contacted in an attempt to locate sources that
       are small, small disadvantaged or women-owned small business concerns.

          (iii)  Records on each subcontract solicitation resulting in an award
       of more than $100,000, indicating (A) whether small business concerns
       were solicited and if not, why not, (B) whether small disadvantaged
       business concerns were solicited and if not, why not, (C) whether 
       women-owned small business concerns were solicited and if not, why not,
       and (D) if applicable, the reason award was not made to a small business
       concern.

          (iv)   Records of any outreach efforts to contact (A) trade
       associations, (B) business development organizations, and (C) conferences
       and trade fairs to locate small, small disadvantaged and women-owned
       small business sources.

          (v)    Records of internal guidance and encouragement provided to
       buyers through (A) workshops, seminars, training, etc., and (B)
       monitoring performance to evaluate compliance with the program's
       requirements.

          (vi)   On a contract-by-contract basis, records to support award data
       submitted by the offeror to the Government, including the name, address,
       and business size of each subcontractor. Contractors having company or
       division-wide annual plans need not comply with this requirement.

     (e)  In order to effectively implement this plan to the extent consistent
  with efficient contract performance, the Contractor shall perform the
  following functions:

     (1)  Assist small, small disadvantaged and women-owned small business
  concerns by arranging solicitations, time for the preparation of bids,
  quantities, specifications, and delivery schedule so as to facilitate the
  participation by such concerns. Where the contractor's lists of potential
  small, small disadvantaged and women-owned small business subcontractors are
  excessively long, reasonable effort shall be made to give all such small
  business concerns an opportunity to compete over a period of time.

     (2)  Provide adequate and timely consideration of the potentialities of
  small, small disadvantaged and women-owned small business concerns in all
  "make-or-buy" decisions.

     (3)  Counsel and discuss subcontracting opportunities with representatives
  of small, small disadvantaged and women-owned small business firms.

     (4)  Provide notice to subcontractors concerning penalties and remedies for
  misrepresentations of business status as small, small disadvantaged

                                   00700-21
<PAGE>
 
     or women-owned small business for the purpose of obtaining a subcontract
     that is to be included as part or all of a goal contained in the
     Contractor's subcontracting plan.

     (f)  A master subcontracting plan on a plant or division-wide basis which 
contains all the elements required by (d) above, except goals, may be 
incorporated by reference as a part of the subcontracting plan required of the 
offeror by this clause; provided, (1) the master plan has been approved, (2) the
offeror provides copies of the approved master plan and evidence of its approval
to the Contracting officer, and (3) goals and any deviations from the master
plan deemed necessary by the Contracting Officer to satisfy the requirements of 
this contract are set forth in the individual subcontracting plan.

     (g) (1) If a commercial product is offered, the subcontracting plan 
required by this clause may relate to the offeror's production generally, for 
both commercial and noncommercial products, rather than solely to the Government
contract. In these cases, the offeror shall, with the concurrence of the 
Contracting Officer, submit one company-wide or division-wide annual plan.

         (2) The annual plan shall be reviewed for approval by the agency
     awarding the offeror its first prime contract requiring a subcontracting
     plan during the fiscal year, or by an agency satisfactory to the
     Contracting Officer.

         (3) The approved plan shall remain in effect during the offeror's 
     fiscal year for all of the offeror's commercial products.

     (h)  Prior compliance of the offeror with other such subcontracting plans 
under previous contracts will be considered by the Contracting Officer in 
determining the responsibility of the offeror for award of the contract.

     (i)  The failure of the Contractor or subcontractor to comply in good faith
with (1) the clause of this contract entitled "Utilization Of Small, Small 
Disadvantaged and Women-Owned Small Business Concerns," or (2) an approved plan 
required by this clause, shall be a material breach of the contract.

                                (End of clause)

15   52.219-16    LIQUIDATED DAMAGES--SUBCONTRACTING PLAN (OCT 1995)


       (a) "Failure to make a good faith effort to comply with the
     subcontracting plan," as used in this clause, means a willful or
     intentional failure to perform in accordance with the requirements of the

                                   00700-22
<PAGE>
 
subcontracting plan approved under the clause in this contract entitled "Small, 
Small Disadvantaged and Women-Owned Small Business Subcontracting Plan," or 
willful or intentional action to frustrate the plan.

     (b)  If, at contract completion, or in the case of a commercial product 
plan, at the close of the fiscal year for which the plan is applicable, the 
Contractor has failed to meet its subcontracting goals and the Contracting 
Officer decides in accordance with paragraph (c) of this clause that the 
Contractor failed to make a good faith effort to comply with its subcontracting 
plan, established in accordance with the clause in this contract entitled 
"Small, Small Disadvantaged and Women-Owned Small Business Subcontracting Plan,"
the Contractor shall pay the Government liquidated damages in an amount stated.
The amount of probable damages attributable to the Contractor's failure to 
comply, shall be an amount equal to the actual dollar amount by which the 
Contractor failed to achieve each subcontract goal or, in the case of a 
commercial products plan, that portion of the dollar amount allocable to 
Government contracts by which the Contractor failed to achieve each subcontract 
goal.

     (c)  Before the Contracting Officer makes a final decision that the
Contractor has failed to make such good faith effort, the Contracting Officer
shall give the Contractor written notice specifying the failure and permitting 
the Contractor to demonstrate what good faith efforts have been made. Failure to
respond to the notice may be taken as an admission that no valid explanation 
exists. If, after consideration of all the pertinent data, the Contracting 
Officer finds that the Contractor failed to make a good faith effort to comply 
with the subcontracting plan, the Contracting Officer shall issue a final 
decision to that effect and require that the Contractor pay the Government 
liquidated damages as provided in paragraph (b) of this clause.

     (d)  With respect to commercial product plans, i.e., company-wide or 
division-wide subcontracting plans approved under paragraph (g) of the clause in
this contract entitled "Small, Small Disadvantaged and Women-Owned Small 
Business Subcontracting Plan," the Contracting Officer of the agency that 
originally approved the plan will exercise the functions of the Contracting 
Officer under this clause on behalf of all agencies that awarded contracts 
covered by that commercial product plan.

     (e)  The Contractor shall have the right of appeal, under the clause in 
this contract entitled, Disputes, from any final decision of the Contracting 
Officer.

     (f)  Liquidated damages shall be in addition to any other remedies that the
Government may have.
 
                                   00700-23
<PAGE>
 
                                (End of clause)

16   52.222-3       CONVICT LABOR (AUG 1996)

          The Contractor agrees not to employ in the performance of this
     contract any person undergoing a sentence of imprisonment which has been
     imposed by any court of a State, the District of Columbia, the Commonwealth
     of Puerto Rico, the Virgin Islands, Guam, American Samoa, the Commonwealth
     of the Northern Mariana Islands, or the Trust Territory of the Pacific
     Islands. This limitation, however, shall not prohibit the employment by the
     Contractor in the performance of this contract of persons on parole or
     probation to work at paid employment during the term of their sentence or
     persons who have been pardoned or who have served their terms. Nor shall it
     prohibit the employment by the Contractor in the performance of this
     contract of persons confined for violation of the laws of any of the
     States, the District of Columbia, the Commonwealth of Puerto Rico, the
     Virgin Islands, Guam, American Samoa, the Commonwealth of the Northern
     Mariana Islands, or the Trust Territory of the Pacific Islands who are
     authorized to work at paid employment in the community under the laws of
     such jurisdiction, if--

          (a)(1) The worker is paid or is in an approved work training program
       on a voluntary basis;

          (2) Representatives of local union central bodies or similar labor
       union organisations have been consulted;

          (3) Such paid employment will not result in the displacement of
       employed workers, or be applied in skills, crafts, or trades in which
       there is a surplus of available gainful labor in the locality, or impair
       existing contracts for services; and

          (4) The rates of pay and other conditions of employment will not be
       less than those paid or provided for work of a similar nature in the
       locality in which the work is being performed; and

       (b) The Attorney General of the United States has certified that the 
     work-release laws or regulations of the jurisdiction involved are in
     conformity with the requirements of Executive Order 11755, as amended by
     Executive Orders 12608 and 12943.

                                (End of clause)

17   52.222-4       CONTRACT WORK HOURS AND SAFETY STANDARDS ACT--OVERTIME
                    COMPENSATION (JUL 1995)

                                   00700-24
<PAGE>
 
     (a)  Overtime requirements. No Contractor or subcontractor contracting for 
any part of the contract work which may require or involve the employment of 
laborers or mechanics (see Federal Acquisition Regulation (FAR) 22.300) shall 
require or permit any such laborers or mechanics in any workweek in which the 
individual is employed on such work to work in excess of 40 hours in such 
workweek unless such laborer or mechanic receives compensation at a rate not 
less that 1 1/2 times the basic rate of pay for all hours worked in excess of 40
hours in such workweek.

     (b)  Violation; liability for unpaid wages; liquidated damages. In the 
event of any violation of the provisions set forth in paragraph (a) of this 
clause, the Contractor and any subcontractor responsible therefor shall be 
liable for the unpaid wages. In addition, such Contractor and subcontractor 
shall be liable to the United States (in the case of work done under contract 
for the District of Columbia or a territory, to such District or to such 
territory), for liquidated damages. Such liquidated damages shall be computed 
with respect to each individual, laborer or mechanic employed in violation of 
the provisions set forth in paragraph (a) of this clause in the sum of $10 for 
each calendar day on which such individual was required or permitted to work in 
excess of the standard workweek of 40 hours without payment of the overtime 
wages required by provisions set forth in paragraph (a) of this clause.

     (c)  Withholding for unpaid wages and liquidated damages. The Contracting 
Officer shall upon his or her own action or upon written request of an
authorized representative of the Department of Labor withhold or cause to be 
withheld, from any moneys payable on account of work performed by the Contractor
or subcontractor under any such contract or any other Federal contract with the 
same Prime Contractor, or any other Federally-assisted contract subject to the 
Contract Work Hours and Safety Standards Act which is held by the same Prime 
Contractor, such sums as may be determined to be necessary to satisfy any 
liabilities of such Contractor or subcontractor for unpaid wages and liquidated 
damages as provided in the provisions set forth in paragraph (b) of this clause.

     (d)  Payrolls and basic records. (1) The Contractor or subcontractor shall 
maintain payrolls and basic payroll records during the course of contract work 
and shall preserve them for a period of 3 years from the completion of the 
contract for all laborers and mechanics working on the contract. Such records 
shall contain the name and address of each such employee, social security 
number, correct classifications, hourly rates of wages paid, daily and weekly 
number of hours worked, deductions made and actual wages paid. Nothing in this 
paragraph shall require the duplication

                                   00700-25

<PAGE>
 
     of records required to be maintained for construction work by Department of
     Labor regulations at 29 CFR S.S(a)(3) implementing the Davis-Bacon Act.

          (2)  The records to be maintained under paragraph (d)(1) of this
       clause shall be made available by the Contractor or subcontractor for
       inspection, copying, or transcription by authorized representatives of
       the Contracting Officer or the Department of Labor. The Contractor or
       subcontractor shall permit such representatives to interview employees
       during working hours on the job.

       (e) Subcontracts. The Contractor or subcontractor shall insert in any
     subcontracts exceeding $100,000, the provisions set forth in paragraphs (a)
     through (e) of this clause and also a clause requiring the subcontractors
     to include these provisions in any lower tier subcontracts. The Prime
     Contractor shall be responsible for compliance by any subcontractor or
     lower tier subcontractor with the provisions set forth in paragraphs (a)
     through (e) of this clause.

                                (End of clause)

18   52.222-6            DAVIS-BACON ACT (FEB 1995)

       (a)  All laborers and mechanics employed or working upon the site of the 
     work will be paid unconditionally and not less often than once a week, and
     without subsequent deduction or rebate on any account (except such payroll
     deductions as are permitted by regulations issued by the Secretary of Labor
     under the Copeland Act (29 CFR Part 3)), the full amount of wages and bona
     fide fringe benefits (or cash equivalents thereof) due at time of payment
     computed at rates not less than those contained in the wage determination
     of the Secretary of Labor which is attached hereto and made a part hereof,
     regardless of any contractual relationship which may be alleged to exist
     between the Contractor and such laborers and mechanics. Contributions made
     or costs reasonably anticipated for bona fide fringe benefits under section
     1(b)(2) of the Davis-Bacon Act on behalf of laborers or mechanics are
     considered wages paid to such laborers or mechanics, subject to the
     provisions of paragraph (d) of this clause, also, regular contributions
     made or costs incurred for more than a weekly period (but not less often
     than quarterly) under plans, funds, or programs which cover the particular
     weekly period, are deemed to be constructively made or incurred during such
     period. Such laborers and mechanics shall be paid not less than the
     appropriate wage rate and fringe benefits in the wage determination for the
     classification of work actually performed, without regard to skill, except

                                   00700-26
<PAGE>
 
as provided in the clause entitled Apprentices and Trainees. Laborers or 
mechanics performing work in more than one classification may be compensated at 
the rate specified for each classification for the time actually worked therein;
provided, that the employer's payroll records accurately set forth the time 
spent in each classification in which work is performed. The wage determination 
(including any additional classifications and wage rates conformed under 
paragraph (b) of this clause) and the Davis-Bacon poster (WH-1321) shall be 
posted at all times by the Contractor and its subcontractors at the site of the 
work in a prominent and accessible place where it can be easily seen by the 
workers.

     (b) (1) The Contracting Officer shall require that any class of laborers or
mechanics which is not listed in the wage determination and which is to be 
employed under the contract shall be classified in conformance with the wage 
determination. The Contracting Officer shall approve an additional 
classification and wage rate and fringe benefits therefor only when all the 
following criteria have been met:

         (i) The work to be performed by the classification requested is not 
        performed by a classification in the wage determination.

         (ii) The classification is utilized in the area by the construction 
        industry.

         (iii) The proposed wage rate, including any bona fide fringe benefits, 
        bears a reasonable relationship to the wage rates contained in the wage 
        determination.

         (iv) With respect to helpers, such a classification prevails in the 
        area in which the work is performed.

        (2) If the Contractor and the laborers and mechanics to be employed in
      the classification (if known), or their representatives, and the
      Contracting Officer agree on the classification and wage rate (including
      the amount designated for fringe benefits, where appropriate), a report of
      the action taken shall be sent by the Contracting Officer to the
      Administrator of the Wage and Hour Division, Employment Standards
      Administration, U.S. Department of Labor, Washington, DC 20210. The
      Administrator or an authorized representative will approve, modify, or
      disapprove every additional classification action within 30 days of
      receipt and so advise the Contracting Officer or will notify the
      Contracting Officer within the 30-day period that additional time is
      necessary.

        (3) In the event the Contractor, the laborers or mechanics to be
      employed in the classification, or their representatives, and the
      Contracting Officer do not agree on the proposed classification and wage
      rate (including the amount designated for fringe benefits, where

                                   00700-27
<PAGE>
 
     appropriate), the Contracting Officer shall refer the questions, including
     the views of all interested parties and the recommendation of the
     Contracting Officer, to the Administrator of the Wage and Hour Division for
     determination. The Administrator, or an authorized representative, will
     issue a determination within 30 days of receipt and so advise the
     Contracting Officer or will notify the Contracting Officer within the 30-
     day period that additional time is necessary.

       (4) The wage rate (including fringe benefits, where appropriate)
     determined pursuant to subparagraphs (b) (2) and (b) (3) of this clause
     shall be paid to all workers performing work in the classification under
     this contract from the first day on which work is performed in the
     classification.

       (c) Whenever the minimum wage rate prescribed in the contract for a class
     of laborers or mechanics includes a fringe benefit which is not expressed
     as an hourly rate, the Contractor shall either pay the benefit as stated in
     the wage determination or shall pay another bona fide fringe benefit or an
     hourly cash equivalent thereof.

       (d) If the Contractor does not make payments to a trustee or other third
     person, the Contractor may consider as part of the wages of any laborer or
     mechanic the amount of any costs reasonably anticipated in providing bona
     fide fringe benefits under a plan or program; provided, that the Secretary
     of Labor has found, upon the written request of the Contractor, that the
     applicable standards of the Davis-Bacon Act have been met. The Secretary of
     Labor may require the Contractor to set aside in a separate account assets
     for the meeting of obligations under the plan or program.

                                (End of clause)

 19  52.222-7         WITHHOLDING OF FUNDS (FEB 1988)

       The Contracting Officer shall, upon his or her own action or upon written
     request of an authorized representative of the Department of Labor,
     withhold or cause to be withheld from the Contractor under this contract or
     any other Federal contract with the same Prime Contractor, or any other
     Federally assisted contract subject to Davis-Bacon prevailing wage
     requirements, which is held by the same Prime Contractor, so much of the
     accrued payments or advances as may be considered necessary to pay laborers
     and mechanics, including apprentices, trainees, and helpers, employed by
     the Contractor or any subcontractor the full amount of wages required by
     the contract. In the event of failure to pay any laborer or mechanic,
     including any apprentice, trainee, or helper, employed or working on the

                                   00700-28
<PAGE>
 
     site of work, all or part of the wages required by the contract, the
     Contracting Officer may, after written notice to the Contractor, take such
     action as may be necessary to cause the suspension of any further payment,
     advance, or guarantee of funds until such violations have ceased.

                                (End of clause)

20   52.222-8              PAYROLLS AND BASIC RECORDS (FEE 1988)

          (a) Payrolls and basic records relating thereto shall be maintained by
     the Contractor during the course of the work and preserved for a period of
     3 years thereafter for all laborers and mechanics working at the site of
     the work. Such records shall contain the name, address, and social security
     number of each such worker, his or her correct classification, hourly rates
     of wages paid (including rates of contributions or costs anticipated for
     bons fide fringe benefits or cash equivalents thereof of the types
     described in section 1(b)(2)(g) of the Davis-Bacon Act), daily and weekly
     number of hours worked, deductions made, and actual wages paid. Whenever
     the Secretary of Labor has found, under paragraph (d) of the clause
     entitled Davis-Bacon Act, that the wages of any laborer or mechanic include
     the amount of any costs reasonably anticipated in providing benefits under
     a plan or program described in section 1(b)(2)(B) of the Davis-Bacon Act,
     the Contractor shall maintain records which show that the commitment to
     provide such benefits is enforceable, that the plan or program is
     financially responsible, and that the plan or program has been communicated
     in writing to the laborers or mechanics affected, and records which show
     the costs anticipated or the actual cost incurred in providing such
     benefits. Contractors employing apprentices or trainees under approved
     programs shall maintain written evidence of the registration of
     apprenticeship programs and certification of trainee programs, the
     registration of apprentices and trainees, and the ratios and wage rates
     prescribed in the applicable programs.

          (b) (1) The Contractor shall submit weekly for each week in which any 
     contract work is performed a copy of all payrolls to the Contracting
     Officer. The payrolls submitted shall set out accurately and completely all
     of the information required to be maintained under paragraph (g) of this
     clause. This information may be submitted in any form desired. Optional
     Form WH-347 (Federal Stock Number 029-005-00014-1) is available for this
     purpose and may be purchased from the Superintendent of Documents, U.S.
     Government Printing Office, Washington, DC 20402. The Prime Contractor is
     responsible for the submission of copies of payrolls by all

                                   00700-29

<PAGE>

subcontractors.

          (2)  Each payroll submitted shall be accompanied by a "Statement of
     Compliance," signed by the Contractor or subcontractor or his or her agent
     who pays or supervises the payment of the persons employed under the
     contract and shall certify--

               (i)    That the payroll for the payroll period contains the
          information required to be maintained under paragraph (a) of this
          clause and that such information is correct and complete:

               (ii)   That each laborer or mechanic (including each helper,
          apprentice, and trainee) employed on the contract during the payroll
          period has been paid the full weekly wages earned, without rebate,
          either directly or indirectly, and that no deductions have been made
          either directly or indirectly from the full wages earned, other than
          permissible deductions as set forth in the Regulations, 29 CFR Part 3;
          and

               (iii)  That each laborer or mechanic has been paid not less than
          the applicable wage rates and fringe benefits or cash equivalents for
          the classification of work performed, as specified in the applicable
          wage determination incorporated into the contract.

          (3)  The weekly submission of a properly executed certification set
     forth on the reverse side of optional Form WK-347 shall satisfy the
     requirement for submission of the "Statement of Compliance" required by
     subparagraph (b) (2) of this clause.

          (4)  The falsification of any of the certifications in this clause may
     subject the Contractor or subcontractor to civil or criminal prosecution
     under Section 1001 of Title 18 and Section 3729 of Title 31 of the United
     States Code.

     (c)  The Contractor or subcontractor shall make the records required under
paragraph (a) of this clause available for inspection, copying, or transcription
by the Contracting Officer or authorized representatives of the Contracting
Officer or the Department of Labor. The Contractor or subcontractor shall permit
the Contracting Officer or representatives of the Contracting Officer or the
Department of Labor to interview employees during working hours on the job. If
the Contractor or subcontractors fails to submit required records or to make
them available, the Contracting Officer may, after written notice to the
Contractor, take such action as may be necessary to cause the suspension of any
further payment. Furthermore, failure to submit the required records upon
request or to make such records available may be grounds for debarment action
pursuant to 29 CFR 5.12.

                                (End of clause)

                                   00700-30
<PAGE>

21   52.222-9           APPRENTICES AND TRAINEES (FEB 1988)   

          (a) Apprentices. Apprentices will be permitted to work at less than
     the predetermined rate for the work they performed when they are employed
     pursuant to and individually registered in a bona fide apprenticeship
     program registered with the U.S. Department of Labor, Employment and
     Training Administration, Bureau of Apprenticeship and Training, or with a
     State Apprenticeship Agency recognized by the Bureau, or if a person is
     employed in his or her first 90 days of probationary employment as an
     apprentice in such an apprenticeship program, who is not individually
     registered in the program, but who has been certified by the Bureau of
     Apprenticeship and Training or a State Apprenticeship Agency (where
     appropriate) to be eligible for probationary employment as an apprentice.
     The allowable ratio of apprentices to journeymen on the job site in any
     craft classification shall not be greater than the ratio permitted to the
     Contractor as to the entire work force under the registered program. Any
     worker listed on a payroll at an apprentice wage rate, who is not
     registered or otherwise employed as stated in this paragraph, shall be paid
     not less than the applicable wage determination for the classification of
     work actually performed. In addition, any apprentice performing work on the
     job site in excess of the ratio permitted under the registered program
     shall not be paid less than the applicable wage rate on the wage
     determination for the work actually performed. Where a contractor is
     performing construction on a project in a locality other than that in which
     its program is registered, the ratios and wage rates (expressed in
     percentages of the journeyman's hourly rate) specified in the Contractor's
     or subcontractor's registered program shall be observed. Every apprentice
     must be paid at not less than the rate specified in the registered program
     for the apprentice's level of progress, expressed as a percentage of the
     journeyman hourly rate specified in the applicable wage determination.
     Apprentices shall be paid fringe benefits in accordance with the provisions
     of the apprenticeship program. If the apprenticeship program does not
     specify fringe benefits, apprentices must be paid the full amount of fringe
     benefits listed on the wage determination for the applicable
     classification. If the Administrator determines that a different practice
     prevails for the applicable apprentice classification, fringes shall be
     paid in accordance with that determination. In the event the Bureau of
     Apprenticeship and Training, or a State Apprenticeship Agency recognized by
     the Bureau, withdraws approval of an apprenticeship program, the Contractor

                                   00700-31
<PAGE>
 
     will no longer be permitted to utilize apprentices at less than the
     applicable predetermined rate for the work performed until an acceptable
     program is approved.

       (b) Trainees. Except as provided in 29 CFR 5.16, trainees will not be
     permitted to work at less than the predetermined rate for the work
     performed unless they are employed pursuant to and individually registered
     in a program which has received prior approval, evidenced by formal
     certification by the U.S. Department of Labor, Employment and Training
     Administration. The ratio of trainees to journeymen on the job site shall
     not be greater than permitted under the plan approved by the Employment and
     Training Administration. Every trainee must be paid at not less than the
     rate specified in the approved program for the trainee's level of progress,
     expressed as a percentage of the journeyman hourly rate specified in the
     applicable wage determination. Trainees shall be paid fringe benefits in
     accordance with the provisions of the trainee program. If the trainee
     program does not mention fringe benefits, trainees shall be paid the full
     amount of fringe benefits listed in the wage determination unless the
     Administrator of the Wage and Hourly Division determines that there is an
     apprenticeship program associated with the corresponding journeyman wage
     rate in the wage determination which provides for less than full fringe
     benefits for apprentices. Any employee listed on the payroll at a trainee
     rate who is not registered and participating in a training plan approved by
     the Employment and Training Administration shall be paid not less than the
     applicable wage rate in the wage determination for the classification of
     work actually performed. In addition, any trainee performing work on the
     job site in excess of the ratio permitted under the registered program
     shall be paid not less than the applicable wage rate in the wage
     determination for the work actually performed. In the event the Employment
     and Training Administration withdraws approval of a training program, the
     Contractor will no longer be permitted to utilize trainees at less than the
     applicable predetermined rate for the work performed until an acceptable
     program is approved.

       (c) Equal employment opportunity. The utilization of apprentices,
     trainees, and journeymen under this clause shall be in conformity with the
     equal employment opportunity requirements of Executive Order 11246, as
     amended, and 29 CFR Part 30.

                                (End of clause)

22   52.222.10         COMPLIANCE WITH COPELAND ACT REQUIREMENTS (FEB 1988)

                                   00700-32
<PAGE>
 
          The Contractor shall comply with the requirements of 29 CPR Part 3,
     which are hereby incorporated by the reference in this contract.

                                (End of clause)



23   52.222-11        SUBCONTRACTS (LABOR STANDARDS) (FEB 1988)

          (a) The Contractor or subcontractor shall insert in any subcontracts
     the clauses entitled Davis-Bacon Act, Contract Work Hours and Safety
     Standards Act--Overtime Compensation, Apprentices and Trainees, Payrolls
     and Basic Records, Compliance with Copeland Act Requirements, Withholding
     of Funds, Subcontracts (Labor Standards), Contract Termination--Debarment,
     Disputes Concerning Labor Standards, Compliance with Davis-Bacon and
     Related Act Regulations, and Certification of Eligibility, and such other
     clauses as the Contracting Officer may, by appropriate instructions,
     require, and also a clause requiring subcontractors to include these
     clauses in any lower tier subcontracts. The Prime Contractor shall be
     responsible for compliance by any subcontractor or lower tier subcontractor
     with all the contract clauses cited in this paragraph.

          (b) (1) Within 14 days after award of the contract, the Contractor
     shall deliver to the Contracting Officer a completed Statement and
     Acknowledgement Form (SF 1413) for each subcontract, including the
     subcontractor's signed and dated acknowledgement that the clauses set forth
     in paragraph (a) of this clause have been included in the subcontract.

             (2) Within 14 days after the award of any subsequently awarded 
          subcontract the Contractor shall deliver to the Contracting Officer
          an updated completed SP 1413 for such additional subcontract.

                                (End of clause)


24   52.222-12      CONTRACT TERMINATION--DEBARMENT (FEB 1988) 


          A breach of the contract clauses entitled Davis-Bacon Act, Contract 
     Work Hours and Safety Standards Act--Overtime Compensation, Apprentices and
     Trainees, Payrolls and Basic Records, Compliance with Copeland Act  
     Requirements, Subcontracts (Labor Standards), Compliance with Davis-Bacon
     and Related Act Regulations, or Certification of Eligibility may be grounds
     for termination of the contract, and for debarment as a Contractor and
     subcontractor as provided in 29 CFR 5.12.

                                (End of clause)

                                   00700-33
<PAGE>
 
25   52.222-13        COMPLIANCE WITH DAVIS-BACON AND RELATED ACT REGULATIONS 
                      (FEB 1988)

          All rulings and interpretations of the Davis-Bacon and Related Acts
     contained in 29 CFR Parts 1, 3, and 5 are hereby incorporated by reference
     in this contract.

                                (End of Clause)


26   52.222-14        DISPUTES CONCERNING LABOR STANDARDS (FEB 1988)

          The United States Department of Labor has set forth in 29 CFR Parts 5,
     6, and 7 procedures for resolving disputes concerning labor standards
     requirements. Such disputes shall be resolved in accordance with those
     procedures and not the Disputes clause of this contract. Disputes within
     the meaning of this clause include disputes between the Contractor (or any
     of its subcontractors) and the contracting agency, the U.S. Department of
     Labor, or the employees of their representatives.

                                (End of clause)


27   52.222-15        CERTIFICATION OF ELIGIBILITY (FEB 1988)

          (a)  By entering into this contract, the Contractor certifies that
     neither it (nor he or she) nor any person or firm who has an interest in
     the Contractor's firm is a person or firm ineligible to be awarded
     Government contracts by virtue of section 3(a) of the Davis-Bacon Act or 29
     CFR 5.12(a)(1).

          (b)  No part of this contract shall be subcontracted to any person or
     firm ineligible for award of a Government contract by virtue of section
     3(a) of the Davis-Bacon Act or 29 CFR 5.12(a)(1).

          (c)  The penalty for making false statements is prescribed in the U.S.
     Criminal Code, 18 U.S.C. 1001.

                                (End of clause)


28   52.222-26        EQUAL OPPORTUNITY (APR 1984)

          (a)  If, during any 12-month period (including the 12 months preceding
     the award of this contract), the Contractor has been or is awarded
     nonexempt Federal contracts and/or subcontracts that have an aggregate
     value in excess of $10,000, the Contractor shall comply with subparagraphs

                                   00700-34

<PAGE>
 
     (b)(1) through (11) below. Upon request, the Contractor shall provide 
     information necessary to determine the applicability of this clause.

          (b)  During performing this Contract, the Contractor agrees as 
     follows:

               (1)  The Contractor shall not discriminate against any employee
          or applicant for employment because of race, color, religion, sex, or
          national origin.

               (2)  The Contractor shall take affirmative action to ensure that
          applicants are employed, and that employees are treated during
          employment, without regard to their race, color, religion, sex, or
          national origin. This shall include, but not be limited to, (i)
          employment, (ii) upgrading, (iii) demotion, (iv) transfer, (v)
          recruitment or recruitment advertising, (vi) layoff of termination,
          (vii) rates of pay or other forms of compensation, and (viii)
          selection for training, including apprenticeship.

               (3)  The Contractor shall post in conspicuous places available to
          employees and applicants for employment the notices to be provided by
          the Contracting Officer that explain this clause.

               (4)  The Contractor shall, in all solicitations or advertisements
          for employees placed by or on behalf of the Contractor, state that all
          qualified applicants will receive consideration for employment without
          regard to race, color, religion, sex, or national origin.

               (5)  The Contractor shall send, to each labor union of
          representative of workers with which it has a collective bargaining
          agreement or other contract or understanding, the notice to be
          provided by the Contracting Officer advising the labor union or
          workers' representative of the Contractor's commitments under this
          clause, and post copies of the notice in conspicuous places available
          to employees and applicants for employment.

               (6)  The Contractor shall comply with Executive Order 11246, as
          amended, and the rules, regulations, and orders of the Secretary of
          Labor.

               (7)  The Contractor shall furnish to the contracting agency all
          information required by Executive Order 11246, as amended, and by the
          rules, regulations, and orders of the Secretary of Labor. Standard
          Form 100 (EEO-1), or any successor form, is the prescribed form to be
          filed within 30 days following the award, unless filed within 12
          months preceding the date of award.

               (8)  The Contractor shall permit access to its books, records,
          and accounts by the contracting agency or the Office of Federal
          Contract Compliance Programs (OFCCP) for the purposes of investigation
          to ascertain the Contractor's compliance with the applicable rules,

                                   00700-35
<PAGE>
 
          regulations, and orders.

               (9)  If the OFCCP determines that the Contractor is not in 
          compliance with this clause or any rule, regulation, or order of the
          Secretary of Labor, this contract may be canceled, terminated, or
          suspended in whole or in part and the Contractor may be declared
          ineligible for further Government contracts, under the procedures
          authorized in Executive Order 11246, as amended. In addition,
          sanctions may be imposed and remedies invoked against the Contractor
          as provided in Executive Order 11246, as amended, the rules,
          regulations, and orders of the Secretary of Labor, or as otherwise
          provided by law.

               (10) The Contractor shall include the terms and conditions of 
          subparagraph (b) (2) through (11) of this clause in every subcontract
          or purchase order that is not exempted by the rules, regulations, or
          orders of the Secretary of Labor issued under Executive Order 11246,
          as amended, so that these terms and conditions will be binding upon
          each subcontractor or vendor.

               (11) The Contractor shall take such action with respect to any 
          subcontract or purchase order as the contracting agency may direct as
          a means of enforcing these terms and conditions, including sanctions
          for noncompliance; provided, that if the Contractor becomes involved
          in, or is threatened with, litigation with a subcontractor or vendor
          as a result of any direction, the Contractor may request the United
          States to enter into the litigation to protect the interests of the
          United States.

          (c) Notwithstanding any other clause in this contract, disputes 
     relative to this clause will be governed by the procedures in 41 CFR 60-
     1.1.

                                (End of clause)

                             (R 7-103.18 1978 SEP)

                                (R 1-12.803-2)

                             (R 7-607.13 1978 SEP)

29   52.222-27      AFFIRMATIVE ACTION COMPLIANCE REQUIREMENTS FOR CONSTRUCTION 
                    (APR 1984)

          (a)  Definitions.

          "Covered area," as used in this clause, means the geographical area 
     described in the solicitation for this contract.

          "Director," as used in this clause, means Director, Office of Federal 
     Contract Compliance Programs (OFCCP), United States Department of Labor, or
     any person to whom the Director delegeses authority.

          "Employer's identification number," as used in this clause, means the
     Federal Social Security number used on the employer's quarterly federal tax

                                   00700-36
<PAGE>
 
return, U.S. Treasury Department Form 941.

     "Minority," as used in this clause, means--

        (1)  American Indian or Alaskan Native (all persons having origins in
     any of the original peoples of North America and maintaining identifiable
     tribal affiliations through membership and participation or community
     identification).

        (2)  Asian and Pacific Islander (all persons having origins in any of
     the original peoples of the Far East, Southeast Asia, the Indian
     Subcontinent, or the Pacific Islands);

        (3)  Black (all persons having origins in any of the black African 
     racial groups not of Hispanic origin); and

        (4)  Hispanic (all persons of Mexican, Puerto Rican, Cuban, Central or
     South American, or other Spanish culture or origin, regardless of race).

     (b)  If the Contractor, or a subcontractor at any tier, subcontracts a
portion of the work involving any construction trade, each such subcontract in
excess of $10,000 shall include this clause and the Notice containing the goals
for minority and female participation stated in the solicitation for this
contract.

     (c)  If the Contractor is participating in a Hometown Plan (41 CFR 60-4)
approved by the U.S. Department of Labor in a covered area, either individually
or through an association, its affirmative action obligations on all work in the
plan area (including goals) shall comply with the plan for those trades that
have unions participating in the plan. Contractors must be able to demonstrate
participation in, and compliance with, the provisions of the plan. Each
Contractor or subcontractor participating in an approved plan is also required
to comply with its obligations under the Equal Opportunity clause, and to make a
good faith effort to achieve each goal under the plan in each trade in which it
has employees. The overall good-faith performance by other Contractors or
subcontractors toward a goal in an approved plan does not excuse any
Contractor's or subcontractor's failure to make good-faith efforts to achieve
the plan's goals.

     (d)  The Contractor shall implement the affirmative action procedures in 
subparagraph (g) (1) through (16) of this clause.  The goals stated in the 
solicitation for this contract are expressed as percentages of the total hours 
of employment and training of minority and female utilization that the 
Contractor should reasonably be able to achieve in each construction trade in 
which it has employees in the covered area.  If the Contractor performs 
construction work in a geographical area located outside of the covered area, it
shall apply the goals established for the geographical area where that work is 
actually performed.  The Contractor is expected to

                                   00700-37
<PAGE>
 
     make substantially uniform progress toward its goals in each craft.       
                                                                               
        (e)  Neither the terms and conditions of any collective bargaining
     agreement, nor the failure by a Union with which the Contractor has a
     collective bargaining agreement, to refer minorities or women shall excuse
     the Contractor's obligations under this clause, Executive Order 11246, as
     amended, or the regulations thereunder.                                  

        (f)  In order for the nonworking training hours of apprentices and
     trainees to be counted in meeting the goals, apprentices and trainees must
     be employed by the Contractor during the training period, and the
     Contractor must have made a commitment to employ the apprentices and
     trainees at the completion of their training, subject to the availability
     of employment opportunities. Trainees must be trained pursuant to training
     programs approved by the U.S. Department of Labor.                        

          (g)  The Contractor shall take affirmative action to ensure equal
     employment opportunity. The evaluation of the Contractor's compliance with
     this clause shall be based upon its effort to achieve maximum results from
     its actions. The Contractor shall document these efforts fully and
     implement affirmative action steps at least as extensive as the following:

               (1)  Ensure a working environment free of harassment,
          intimidation, and coercion at all sites and in all facilities where
          the Contractor's employees are assigned to work. The Contractor, if
          possible, will assign two or more women to each construction project.
          The Contractor shall ensure that foremen, superintendents, and other
          onsite supervisory personnel are aware of and carry out the
          Contractor's obligation to maintain such a working environment, with
          specific attention to minority or female individuals working at these
          sites or facilities.

               (2)  Establish and maintain a current list of sources for
          minority and female recruitment. Provide written notification to
          minority and female recruitment sources and community organizations
          when the Contractor or its unions have employment opportunities
          available, and maintain a record of the organizations' responses.

               (3)  Establish and maintain a current file of the names,
          addresses, and telephone numbers of each minority and female off-the-
          street applicant, referrals of minorities or females from unions,
          recruitment sources, or community organizations, and the action taken
          with respect to each individual. If an individual was sent to the
          union hiring hall for referral and not referred back to the Contractor
          by the union or, if referred back, not employed by the Contractor,
          this shall be documented in the file, along with whatever additional
          actions the Contractor may have taken.

               (4)  Immediately notify the Director when the union or unions 
          with   

                                 00700-38   
 
<PAGE>

which the Contractor has a collective bargaining agreement has not referred back
to the Contractor a minority or woman sent by the Contractor, or when the
Contractor has other information that the union referral process has impeded the
Contractor's efforts to meet its obligations.

    (5)  Develop on-the-job training opportunities and/or participate in 
training programs for the area that expressly include minorities and women, 
including upgrading programs and apprenticeship and trainee programs relevant 
to the Contractor's employment needs, especially those programs funded or 
approved by the Department of Labor. The Contractor shall provide notice of 
these programs to the sources complied under subparagraph (g) (2) above.

    (6)  Disseminate the Contractor's equal employment policy by-- 

       (i)   Providing notice of the policy to unions and to training, 
    recruitment, and outreach programs, and requesting their cooperation in 
    assisting the Contractor in meeting its contract obligations;

       (ii)  Including the policy in any policy manual and in collective 
    bargaining agreements;

       (iii) Publicizing the policy in this company newspaper, annual 
    report, etc.;

       (iv)  Reviewing the policy with all management personnel and with all 
    minority and female employees at least once a year; and

       (v)   Posting the policy on bulletin boards accessible to employees at 
    each location where construction work is performed.

    (7)  Review, at least annually, the Contractor's equal employment policy
and affirmative action obligations with all employees having responsibility for
hiring, assignment, layoff, termination, or other employment decisions. Conduct
review of this policy with all onsite supervisory personnel before initiating
construction work at a job site. A written record shall be made and maintained
identifying the time and place of these meetings, persons attending, subject
matter discussed, and disposition of the subject matter.

       (8)  Disseminate the Contractor's equal employment policy externally by 
including it in any advertising in the news media, specifically including
minority and female news media. Provide written notification to, and discuss
this policy with, other Contractors and Subcontractors with which the
Contractors does or anticipates doing business.

       (9)  Direct recruitment efforts, both oral and written, to minority, 
female, and community organizations, to schools with minority and female
students, and to minority and female recruitment and training organizations
serving the Contractor's recruitment area and employment

                                   00700-39
<PAGE>

               needs. Not later than 1 month before the date for acceptance of
               applications for apprenticeship or training by any recruitment
               source, send written notification to organizations such as the
               above, describing the openings, screening procedures, and tests
               to be used in the selection process.

                    (10) Encourage present minority and female employees to
               recruit minority persons and women. Where reasonable, provide
               after-school, summer, and vacation employment to minority and
               female youth both on the site and in other areas of the
               Contractor's workforce.

                    (11) Validate all tests and other selection requirements
               where required under 41 CFR 60-3.

                    (12) Conduct, at least annually, an inventory and evaluation
               at least of all minority and female personnel for promotional
               opportunities. Encourage these employees to seek or to prepare
               for, through appropriate training, etc., opportunities for
               promotion.

                    (13) Ensure that seniority practices job classifications,
               work assignments, and other personnel practices do not have a
               discriminatory effect by continually monitoring all personnel and
               employment-related activities to ensure that the Contractor's
               obligations under this contract are being carried out.

                    (14) Ensure that all facilities and company activities are
               nonsegrated except that separate or single-user toilet and
               necessary changing facilities shall be provided to assure privacy
               between the sexes.

                    (15) Maintain a record of solicitations for subcontracts for
               minority and female construction contractors and suppliers,
               including circulation of solicitations to minority and female
               contractor associations and other business associations.

                    (16) Conduct a review, at least annually, of all
               supervisors' adherence to and performance under the Contractor's
               equal employment policy and affirmative action obligations.

               (h)  The Contractor is encouraged to participate in voluntary
          associations that may assist in fulfilling one or more of the
          affirmative action obligations contained in subparagraphs (g)(1)
          through (16). The efforts of a contractor association, joint
          contractor-union, contractor-community, or similar group of which the
          contractor is a member and participant may be asserted as fulfilling
          one or more of its obligations under subparagraphs (g)(1) through
          (16), provided the Contractor

                    (1)  Actively participates in the group;
 
                    (2)  Makes every effort to ensure that the group has a
               positive impact on the employment of minorities and women in the
               industry;
 
                                   00700-40
<PAGE>
 
                    (3)  Ensures that concrete benefits of the program are
               reflected in the Contractor's minority and female workforce
               participation;

                    (4)  Makes a good-faith effort to meet its individual goals
               and timetables; and

                    (5)  Can provide access to documentation that demonstrates
               the effectiveness of actions taken on behalf of the Contractor.
               The obligation to comply is the Contractor's, and failure of such
               a group to fulfill an obligation shall not be a defense for the
               Contractor's noncompliance.

               (i)  A single goal for minorities and a separate single goal for
          women shall be established. The Contractor is required to provide
          equal employment opportunity and to take affirmative action for all
          minority groups, both male and female, and all women, both minority
          and nonminority. Consequently, the Contractor may be in violation of
          Executive Order 11246, as amended, if a particular group is employed
          in a substantially disparate manner.

               (j)  The Contractor shall not use goals or affirmative action
          standards to discriminate against any person because of race, color,
          religion, sex, or national origin.

               (k)  The Contractor shall not enter into any subcontract with any
          person or firm debarred from Government contracts under Executive
          Order 11246, as amended.

               (l)  The Contractor shall carry out such sanctions and penalties
          for violation of this clause and of the Equal Opportunity clause,
          including suspension, termination, and cancellation of existing
          subcontracts, as may be imposed or ordered under Executive Order
          11246, as amended, and its implementing regulations, by the OFCCP. Any
          failure to carry out these sanctions and penalties as ordered shall be
          a violation of this clause and Executive Order 11246, as amended.

               (m)  The Contractor in fulfilling its obligations under this
          clause shall implement affirmative action procedures at least as
          extensive as those prescribed in paragraph (g) above, so as to achieve
          maximum results from its efforts to ensure equal employment
          opportunity. If the Contractor fails to comply with the requirements
          of Executive Order 11246, as amended, the implementing regulations, or
          this clause, the Director shall take action as prescribed in CFR 60-4.
          8.

               (n)  The Contractor shall designate a responsible official to--

                    (1)  Monitor all employment-related activity to ensure that 
               the Contractor's equal employment policy is being carried out;

                    (2)  Submit reports as may be required by the Government; 
               and

                    (3)  Keep records that shall at least include for each 
               employee the

                                   00700-41
<PAGE>
 
          name, address, telephone number, construction trade, union affiliation
          (if any), employee identification number, social security number,
          race, sex, status (e.g., mechanic, apprentice, trainee, helper, or
          laborer), dates of changes in status, hours worked per week in the
          indicated trade, rate of pay, and locations at which the work was
          performed. Records shall be maintained in an easily understandable and
          retrievable form; however, to the degree that existing records satisfy
          this requirement, separate records are not required to be maintained.

          (o)  Nothing contained herein shall be construed as a limitation upon
     the application of other laws that establish different standards of
     compliance or upon the requirements for the hiring of local or other area
     residents (e.g., those under the Public Works Employment Act of 1977 and
     the Community Development Block Grant Program).

                                (End of clause)

                             (R 7-603.60 1978 SEP)



30   52.22-35       AFFIRMATIVE ACTION FOR SPECIAL DISABLED AND VIETNAM ERA 
                    VETERANS (APR 1984)


          (a)  Definitions.

          "Appropriate office of the State employment service system," as used
     in this clause, means the local office of the Federal-State national system
     of public employment offices assigned to serve the area where the
     employment opening is to be filled, including the District of Columbia,
     Guam, Puerto Rico, Virgin Islands, American Samoa, and the Trust Territory
     of the Pacific Islands.

          "Openings that the Contractor proposes to fill from within its own
     organization," as used in this clause, means employment openings for which
     no one outside the Contractor's organization (including any affiliates,
     subsidiaries, and the parent companies) will be considered and includes any
     openings that the Contractor proposes to fill from regularly established
     "recall" lists.

          "Openings that the Contractor proposes to fill under a customary and
     traditional employer-union hiring arrangement," as used in this clause,
     means employment openings that the Contractor proposes to fill from union
     halls, under their customary and traditional employer-union hiring
     relationship.

          "Suitable employment openings," as used in this clause--

               (1)  Includes, but is not limited to, openings that occur in jobs
          categorized as--

                                   00700-42
<PAGE>
 
                    (i)    Production and nonproduction;

                    (ii)   Plant and office;

                    (iii)  Laborers and mechanics;

                    (iv)   Supervisory and nonsupervisory;

                    (v)    Technical; and

                    (vi)   Executive, administrative, and professional positions
               compensated on a salary basis of less than $25,000 a year; and

               (2)  Includes full-time employment, temporary employment of over
          3 days, and part-time employment, but not openings that the Contractor
          proposes to fill from within its own organization or under a customary
          and traditional employer-union hiring arrangement, nor openings in an
          educational institution that are restricted to students of that
          institution.

          (b)  General. (1) Regarding any position for which the employee or
     applicant for employment is qualified, the Contractor shall not
     discriminate against the individual because the individual is a special
     disabled or Vietnam Era veteran. The Contractor agrees to take affirmative
     action to employ, advance in employment, and otherwise treat qualified
     special disabled and Vietnam Era veterans without discrimination based upon
     their disability or veterans' Status in all employment practices such as--

                    (i)    Employment;

                    (ii)   Upgrading;

                    (iii)  Demotion or transfer;

                    (iv)   Recruitment;

                    (v)    Advertising;

                    (vi)   Layoff or termination;

                    (vii)  Rates of pay or other forms of compensation; and

                    (viii) Selection for training, including apprenticeship.

               (2)  The Contractor agrees to comply with the rules, regulations,
          and relevant orders of the Secretary of Labor (Secretary) issued under
          the Vietnam Era Veterans' Readjustment Assistance Act of 1972 (the
          Act), as amended.

          (c)  Listing openings. (1) The Contractor agrees to list all suitable
     employment openings existing at contract award of occurring during contract
     performance, at an appropriate office of the State employment service
     system in the locality where the opening occurs. These openings include
     those occurring at any Contractor facility, including one not connected
     with performing this contract. An independent corporate affiliate is exempt
     from this requirement.

               (2)  State and local government agencies holding Federal
          contracts of $10,000 or more shall also list all their suitable
          openings with the

                                   00700-43
<PAGE>
 
          appropriate office of the State employment service.

               (3)  The listing of suitable employment openings with the State
          employment service system is required at least concurrently with using
          any other recruitment source or effort and involves the obligations of
          placing a bona fide job order, including accepting referrals of
          veterans and nonveterans. This listing does not require hiring any
          particular job applicant or hiring from any particular group of job
          applicants and is not intended to relieve the Contractor from any
          requirements of Executive orders or regulations concerning
          nondiscrimination in employment.

               (4)  Whenever the Contractor becomes contractually bound to the
          listing terms of this clause, it shall advise the State employment
          service system, in each State where it has establishments, of the name
          and location of each hiring location in the State. As long as the
          Contractor is contractually bound to these terms and has so advised
          the State system, it need not advise the State system of subsequent
          contracts. The Contractor may advise the State system when it is no
          longer bound by this contract clause.

               (5)  Under the most compelling circumstances, an employment
          opening may not be suitable for listing, including situations when (i)
          the Government's needs cannot reasonably be supplied, (ii) listing
          would be contrary to national security, or (iii) the requirements of
          listing would not be in the Government's interest.

          (d)  Applicability. (1) This clause does not apply to the listing of
     employment openings which occur and are filled outside the 50 States, the
     District of Columbia, Puerto Rico, Guam, Virgin Islands, American Samoa,
     and the Trust Territory of the Pacific Islands.

               (2)  The terms of paragraph (c) above of this clause do not apply
          to openings that the Contractor proposes to fill from within its own
          organization or under a customary and traditional employer-union
          hiring arrangement. This exclusion does not apply to a particular
          opening once an employer decides to consider applicants outside of its
          own organization or employer-union arrangement for that opening.

          (e)  Postings. (1) The Contractor agrees to post employment notices
     stating (i) the Contractor's obligation under the law to take affirmative
     action to employ and advance in employment qualified special disabled
     veterans and veterans of the Vietnam era, and (ii) the rights of applicants
     and employees.

               (2)  These notices shall be posted in conspicuous places that are
          available to employees and applicants for employment. They shall be in
          a form prescribed by the Director, Office of Federal Contract
          Compliance

                                   00700-44
<PAGE>
 
          Programs, Department of Labor (Director), and provided by or through
          the Contracting Officer.

               (3)  The Contractor shall notify each labor union or,
          representative of workers with which it has a collective bargaining
          agreement or other contract understanding, that the Contractor is
          bound by the terms of the Act, and is committed to take affirmative
          action to employ, and advance in employment, qualified special
          disabled and Vietnam Era veterans.

          (f)  Noncompliance. If the Contractor does not comply with the
     requirements of this clause, appropriate actions may be taken under the
     rules, regulations, and relevant orders of the Secretary issued pursuant to
     the Act.

          (g)  Subcontracts. The Contractor shall include the terms of this
     clause in every subcontract or purchase order of $10,000 or more unless
     exempted by rules, regulations, or orders of the Secretary. The Contractor
     shall act as specified by the Director to enforce the terms, including
     action for noncompliance.

                                (End of clause)

                             (R 7-103.27 1976 JUL)

                             (R FPR Temp. Reg. 39)


31   52.222-36      AFFIRMATIVE ACTION FOR HANDICAPPED WORKERS (APR 1984)

          (a)  General. (1) Regarding any position for which the employee or
     applicant for employment is qualified, the Contractor shall not
     discriminate against any employee or applicant because of physical or
     mental handicap. The Contractor agrees to take affirmative action to
     employ, advance in employment, and otherwise treat qualified handicapped
     individuals without discrimination based upon their physical or mental
     handicap in all employment practices such as--

               (i)    Employment;

               (ii)   Upgrading;

               (iii)  Demotion or transfer;

               (iv)   Recruitment;

               (v)    Advertising;

               (vi)   Layoff or termination;

               (vii)  Rates of pay or other forms of compensation; and

               (viii) Selection for training, including apprenticeship,

          (2)  The Contractor agrees to comply with the rules, regulations, and
     relevant orders of the Secretary of Labor (Secretary) issued under the
     Rehabilitation Act of 1973 (29 U.S.C. 793) (the Act), as amended.

                                   00700-45
<PAGE>
 
          (b)  Postings. (1) The Contractor agreed to post employment notices
     stating (i) the Contractor's obligation under the law to take affirmative
     action to employ and advance in employment qualified handicapped
     individuals and (ii) the rights of applicants and employees.

               (2)  These notices shall be posted in conspicuous places that are
          available to employees and applicants for employment. They shall be in
          a form prescribed by the Director, Office of Federal Contract
          Compliance Programs, Department of Labor (Director), and provided by
          or through the Contracting Officer.

               (3)  The Contractor shall notify each labor union or
          representative of workers with which it has a collective bargaining
          agreement or other contract understanding, that the Contractor is
          bound by the terms of Section 503 of the Act and is committed to take
          affirmative action to employ, and advance in employment, qualified
          physically and mentally handicapped individuals.

          (c)  Noncompliance. If the Contractor does not comply with the
     requirements of this clause, appropriate actions may be taken under the
     rules, regulations, and relevant orders of the Secretary issued pursuant to
     the Act.

          (d)  Subcontracts. The Contractor shall include the terms of this
     clause in every subcontract or purchase order in excess of $2,500 unless
     exempted by rules, regulations, or orders of the Secretary. The Contractor
     shall act as specified by the Director to enforce the terms, including
     action for noncompliance.

                                (End of clause)

                             (R 7-103.28 1976 MAY)

                             (R FPR Temp. Reg. 38)


32   52.222-37      EMPLOYMENT REPORTS ON SPECIAL DISABLED VETERANS AND VETERANS
                    OF THE VIETNAM ERA (JAN 1988)

          (a)  The contractor shall report at least annually, as required by the
     Secretary of Labor, on:

               (1)  The number of special disabled veterans and the number of
          veterans of the Vietnam era in the workforce of the contractor by job
          category and hiring location; and

               (2)  The total number of new employees hired during the period
          covered by the report, and of that total, the number of special
          disabled veterans, and the number of veterans of the Vietnam era.

          (b)  The above items shall be reported by completing the form entitled

                                   00700-46
<PAGE>
 
     "Federal Contractor Veterans' Employment Report VETS-100."

          (c)  Reports shall be submitted no later than March 31 of each year 
     beginning March 31, 1998.

          (d)  The employment activity report required by paragraph (a)(2) of
     this clause shall reflect total hires during the most recent 12-month
     period as of the ending date selected for the employment profile report
     required by paragraph (a)(1) of this clause. Contractors may select an
     ending date: (1) As of the end of any pay period during the period January
     through March 1st of the year the report is due, or (2) as of December 31,
     if the contractor has previous written approval from the Equal Employment
     Opportunity Commission to do so for purposes of submitting the Employer
     Information Report EEO-1 (Standard Form 100).

          (e)  The count of veterans reported according to paragraph (a) of this
     clause shall be based on voluntary disclosure. Each contractor subject to
     the reporting requirements at 38 U.S.C 2012(d) shall invite all special
     disabled veterans and veterans of the Vietnam era who wish to benefit under
     the affirmative action program at 38 U.S.C. 2012 to identify themselves to
     the contractor. The invitation shall state that the information is
     voluntarily provided, that the information will be kept confidential, that
     disclosure or refusal to provide the information will not subject the
     applicant or employee to any adverse treatment and that the information
     will be used only in accordance with the regulations promulgated under 38
     U.S.C. 2012.

          (f)  Subcontracts. The Contractor shall include the terms of this
     clause in every subcontract or purchase order of $10,000 or more unless
     exempted by rules, regulations, or orders of the Secretary.

                                (End of clause)


33   52.223-2       CLEAN AIR AND WATER (APR 1984)

          (a)  "Air Act", as used in this clause, means the Clean Air Act (42 
     U.S.C. 7401, et seq.).

          "Clean air standards," as used in this clause, means--

               (1)  Any enforceable rules, regulations, guidelines, standards,
          limitations, orders, controls, prohibitions, work practices, or other
          requirements contained in, issued under, or otherwise adopted under
          the Air Act or Executive Order 11736;

               (2)  An applicable implementation plan as described in section 
          110(d) of the Air Act (42 U.S.C. 7410(d));

               (3)  An approved implementation procedure or plan under section 
          111(c)

                                   00700-47
<PAGE>
 
          or section 111(d) of the Air Act (42 U.S.C. 7411(c) of (d)); or

               (4)  An approved implementation procedure under section 112(d) of
          the Air Act (42 U.S.C. 7412(d)).

          "Clean water standards," as used in this clause, means any enforceable
     limitation, control, condition, prohibition, standard, or other requirement
     promulgated under the Water Act or contained in a permit issued to a
     discharger by the EPA or by a State under an approved program, as
     authorized by section 402 of the Water Act (33 U.S.C. 1342), or by local
     government to ensure compliance with pretreatment regulations as required
     by section 307 of the Water Act (33 U.S.C. 1317).

          "Compliance," as used in this clause, means complained with--

               (1)  Clean air or water standards; or

               (2)  A schedule or plan ordered or approved by a court of
          competent jurisdiction, the EPA, or an air or water pollution control
          agency under the requirements of the Air Act or Water Act and related
          regulations.

          "Facility," as used in this clause, means any building, plant,
     installation, structure, mine, vessel or other floating craft, location, or
     site of operations, owned, leased, or supervised by a Contractor or
     subcontractor, used in the performance of a contract or subcontractor. When
     a location or site of operations included more than one building, plant,
     installation, or structure, the entire location or site shall be deemed a
     facility except when the Administrator, or a designee, of the EPA
     determines that independent facilities are collocated in the geographical
     area.

          "Water Act," as used in this clause, means Clean Water Act (33 U.S.C. 
     1251, et seq.).

          (b)  The Contractor agrees--

               (1)  To comply with all the requirements of section 114 of the
          Clean Air Act (42 U.S.C. 7414) and section 308 of the Clean Water Act
          (33 U.S.C. 1318) relating to inspection, monitoring, entry, reports,
          and information, as well as other requirements specified in action 114
          and section 308 of the Air Act and the Water Act, and all regulations
          and guidelines issued to implement those acts before the award of this
          contract;

               (2)  That no portion of the work required by this prime contract
          will be performed in a facility listed on the EPA list of Violating
          Facilities on the date when this contract was awarded unless and until
          the EPA eliminates the name of the facility from the listing;

               (3)  To use best efforts to comply with clean air standards and
          clean water standards at the facility in which the contract is being
          performed; and

                                   00700-48
<PAGE>
 
               (4)  To insert the substance of this clause into any nonexempt 
          subcontract, including this subparagraph (b)(4).

                                (End of clause)

                             (R 7-103.29 1975 OCT)

                                 (R 1-1.2302)


34   52.223-6       DRUG-FREE WORKPLACE (JAN 1997)

          
          (a)  Definitions. As used in this clause--

          "Controlled substance" means a controlled substance in Schedules I
     through V of section 202 of the Controlled Substances Act (21 U.S.C. 812)
     and as further defined in regulation at 21 CFR 1308.11 - 1308.15.

          "Conviction" means a finding of guilt (including a plea of nolo
     contendere) or imposition of sentence, or both, by any judicial body
     charged with the responsibility to determine violations of the Federal or
     State criminal drug statutes.

          "Criminal drug statute" means a Federal or non-Federal criminal
     statute involving the manufacture, distribution, dispensing, possession or
     use of any controlled substance.

          "Drug-free workplace" means the site(s) for the performance of work
     done by the Contractor in connection with a specific contract at which
     employees of the Contractor are prohibited from engaging in the unlawful
     manufacture, distribution, dispensing, possession, or use of a controlled
     substance.

          "Employee" means an employee of a Contractor directly engaged in the
     performance of work under a Government contract. "Directly engaged" is
     defined to include all direct cost employees and any other Contractor
     employee who has other than a minimal impact or involvement in contract
     performance.

          "Individual" means an offeror/contractor that has no more than one 
     employee including the offeror/contractor.

          (b)  The Contractor, if other than an individual, shall--within 30
     days after award (unless a longer period is agreed to in writing for
     contracts of 30 days or more performance duration), or as soon as possible
     for contracts of less than 30 days performance duration--

               (1)  Publish a statement notifying its employees that the
          unlawful manufacture, distribution, dispensing, possession, or use of
          a controlled substance is prohibited in the Contractor's workplace and
          specifying the actions that will be taken against employees for
          violations of such prohibition;

               (2)  Establish an ongoing drug-free awareness program to inform 
          such

                                   00700-49
<PAGE>
 
          employees about--

                    (i)    The dangers of drug abuse in the workplace;

                    (ii)   The Contractor's policy of maintaining a drug-free
               workplace;
     
                    (iii)  Any available drug counseling, rehabilitation, and
               employee assistance programs; and

                    (iv)   The penalties that may be imposed upon employees for
               drug abuse violations occurring in the workplace;

               (3)  Provide all employees engaged in performance of the contract
          with a copy of the statement required by subparagraph (b)(1) of this
          clause;
     
               (4)  Notify such employees in writing in the statements required
          by subparagraph (b) (1) of this clause that, as a condition of
          continued employment on this contract, the employee will--

                    (i)    Abide by the terms of the statement; and

                    (ii)   Notify the employer in writing of the employee's
               conviction under a criminal drug statute for a violation
               occurring in the workplace no later than 5 days after such
               conviction.

               (5)  Notify the Contracting Officer in writing within 10 days
          after receiving notice under subdivision (b)(4)(ii) of this clause,
          from an employee or otherwise receiving actual notice of such
          conviction. The notice shall include the position title of the
          employee;

               (6)  Within 30 days after receiving notice under subdivision (b)
          (4)(ii) of this clause of a conviction, take one of the following
          actions with respect to any employee who is convicted of a drug abuse
          violation occurring in the workplace:

                    (i)    Taking appropriate personnel action against such
               employee, up to and including termination; or

                    (ii)   Require such employee to satisfactorily participate
               in a drug abuse assistance or rehabilitation program approved for
               such purposes by a Federal, State, or local health, law
               enforcements, or other appropriate agency, and

               (7)  Make a good faith effort to maintain a drug-free workplace
          through implementation of subparagraphs (b)(1) through (b)(6) of this
          clause.
     
          (c)  The Contractor, if an individual, agrees by award of the contract
          or acceptance of a purchase order, not to engage in the unlawful
          manufacture, distribution, dispensing, possession, or use of a
          controlled substance while performing this contract.
  
          (d)  In addition to other remedies available to the Government, the
          Contractor's failure to comply with the requirements of paragraph (b)
          or (c) of this clause may, pursuant to FAR 23.506, render the
          Contractor subject to suspension of contract payments, termination of
          the contract

                                   00700-50
<PAGE>
 
     for default, and suspension of debarment.

                                 (End of Clause)


35   52.223-14         TOXIC CHEMICAL RELEASE REPORTING (OCT 1996)
     
       (a) Unless otherwise exempt, the Contractor, as owner or operator of a
     facility used in the performance of this contract, shall file by July 1 for
     the prior calendar year an annual Toxic Chemical Release Inventory Form 
     (Form R) as described in sections 313(a) and (g) of the Emergency Planning
     and Community Right-to-Know Act of 1986 (EPCRA) (42 U.S.C. 11023 (a) and 
     (g)), and section 6607 of the Pollution Prevention Act 1990 (PPA) 
     (42 U.S.C 13106).  The Contractor shall file, for each facility subject to 
     the Form R filing and reporting requirements, the annual Form R throughout
     the life of the contract.

       (b) A Contractor owned or operated facility used in the performance of
     this contract is exempt from the requirement to file an annual Form R if--

           (1) The facility does not manufacture, process, or otherwise use
       any toxic chemicals listed under section 313 (c) of EPCRA, 42 U.S.C 11023
       (c);

           (2) The facility does not have 10 or more full-time employees as 
       specified in section 313 (b) (1) (A) of EPCRA, 42 U.S.C. 11023 (b) (1) 
       (A);

           (3) The facility does not meet the reporting thresholds of toxic
       chemicals established under Section 313 (f) of EPCRA, 42 U.S.C. 11023 (f)
       (including the alternate threshold at 40 CFR 372.27, provided an 
       appropriate certification form has been filed with EPA);

           (4) The facility does not fall within Standard Industrial
       Classification Code (SIC) designations 20 through 39 as set forth in 
       Section 19.102 of the Federal Acquisition Regulation (FAR); or

           (5) The facility is not located within any State of the United
       States, the District of Columbia, the Commonwealth of Puerto Rico, Guam,
       American, Samoa, the United States Virgin Islands, the Northern Mariana
       Islands, or any other territory or possession over which the United
       States has jurisdiction.

       (c) If the Contractor has certified to an exemption in accordance with 
     one or more of the criteria in paragraph (b) of this clause, and after 
     award of the contract circumstances change so that any of its owned or 
     operated facilities used in the performance of this contract is no longer
     exempt--

          (1)  The Contractor shall notify the Contracting Officer; and 
          
          (2)  The Contractor, as owner or operator of a facility used in the
       performance of this contract that is no longer exempt; shall (i) submit a

                                   00700-51
<PAGE>
 
          Toxic Chemical Release Inventory Form (Form R) On or before July 1 for
          the prior calendar year during which the facility becomes eligible; 
          and (ii) continue to file the annual Form R for the life of the 
          contract for such facility.

          (d)  The Contracting Officer may terminate this Contract or take other
     action as appropriate, if the Contractor fails to comply accurately and
     fully with the EPCRA and PPA toxic chemical release filing and reporting
     requirements.

          (e)  Except for acquisitions of commercial items as defined in FAR 
     Part 2. the Contractor shall--

               (1)  For competitive subcontracts expected to exceed $100,000 
          (including all options), include a solicitation provision
          substantially the same as the provision at FAR 52.223-33,
          Certification of Toxic Chemical Release Reporting; and

               (2)  Include in any resultant subcontract exceeding $100,000 
          (including all options), the substance of this clause, except this
          paragraph (e).

                                (End of clause)


36   52.225-5     BUY AMERICAN ACT--CONSTRUCTION MATERIALS (MAY 1992)

          (a)  The Buy American Act (41 U.S.C. 10) provides that the Government 
     give preference to domestic construction material.

          "Components," as used in this clause, means those articles, materials,
     and supplies incorporated directly into construction materials.

          "Construction materials," as used in this clause, means an article, 
     material, or supply brought to the construction site for incorporation into
     the building or work. Construction material also includes an item brought
     to the site pre-assembled from articles, materials or supplies. However,
     emergency life safety systems, such as emergency lighting, fire alarm, and
     audio evacuation systems, which are discrete systems incorporated into a
     public building or work and which are produced as a complete system, shall
     be evaluated as a single and distinct construction material regardless of
     when or how the individual parts or components of such systems are
     delivered to the construction site.

          "Domestic construction material," as used in this clause, means (1) an
     unmanufactured construction material mined or produced in the United
     States, or (2) a construction material manufactured in the United States,
     if the cost of its components mined, produced, or manufactured in the
     United States exceeds 50 percent of the cost of all its components.
     Components of foreign origin of the same class or kind as the construction

                                   00700-52
<PAGE>
 
          materials determined to be unavailable pursuant to subparagraph
          25.202(a)(3) of the Federal Acquisition Regulation (FAR) shall be
          created as domestic.

               (b)  The Contractor agrees that only domestic construction
          material will be used by the Contractor, subcontractors, materialmen,
          and suppliers in the performance of this contract, except for foreign
          construction materials, if any, listed in this contract. (The
          foregoing requirements are administered in accordance with Executive
          Order No. 10582, dated December 17, 1954, as amended, and Subpart 25.2
          of the FAR).

                                (End of clause)

     37   52.225-11    RESTRICTIONS ON CERTAIN FOREIGN PURCHASES (OCT 1996)


               (a)  Unless advance written approval of the Contracting Officer
          is obtained, the Contractor shall not acquire, for use in the
          performance of this contract, any supplies of services originating
          from sources within, or that were located in or transported from or
          through, countries whose products are banned from importation into the
          United States under regulations of the Office of Foreign Assets
          Control, Department of the Treasury. Those countries include Cuba,
          Iran, Iraq, Libya, and North Korea.

               (b)  The Contractor shall not acquire for use in the performance
          of this contract any supplies or services from entities controlled by
          the Government of Iraq.

               (c)  The Contractor agrees to insert the provisions of this 
          clause, including this paragraph (c), in all subcontracts hereunder.

                                (End of clause)

     38   52.225-15    BUY AMERICAN ACT--CONSTRUCTION MATERIALS UNDER TRADE 
                       AGREEMENTS ACT AND NORTH AMERICAN FREE TRADE AGREEMENT 
                       (JAN 1996)

               (a)  Definitions. As used in this clause--

               "Components" means those articles, materials, and supplies 
          incorporated directly into construction materials.

               "Construction material" means an article, material, or supply
          brought to the construction site for incorporation into the building
          or work. Construction material also includes an item brought to the
          site pre-assembled from articles, materials, or supplies. However,
          emergency life safety systems, such as emergency lighting, fire alarm,
          and audio

                                   00700-53
<PAGE>

          evacuation systems, which are discrete systems incorporated into a
          public building or work and which are produced as a complete system,
          shall be evaluated as a single and distinct construction material
          regardless of when or how the individual parts or components of such
          Systems are delivered to the construction site.

               "Designated country construction material" means a construction
          material that (a) is wholly the growth, product, or manufacture of a
          designated country (as defined at FAR 25.401), or (b) in the case of
          a construction material which consists in whole or in part of
          materials from another country or instrumentality, has been
          substantially transformed in a designated country into a new and
          different construction material distinct from the materials from which
          it was transformed.

               "Domestic construction material" means (1) an unmanufactured
          construction material mined or produced in the United States, or (2) a
          construction material manufactured in the United States, if the cost
          of its components mined, produced, or manufactured in the United
          States exceeds 50 percent of the cost of all its components.
          Components of foreign origin of the same class or kind as the
          construction materials determined to be unavailable pursuant to
          subparagraph 25.202(a) (3) of the Federal Acquisition Regulation (FAR)
          shall be treated as domestic.

               "North American Free Trade Agreement (NAFTA) country" means 
          Canada or Mexico.

               "NAFTA country construction material" means a construction
          material that (a) is wholly the growth, product, or manufacture of a
          NAFTA country, or (b) in the case of a construction material which
          consists in whole or in part of materials from another country or
          instrumentality, has been substantially transformed in a NAFTA country
          into a new and different construction material distinct from the
          materials from which it was transformed.

               (b)  The Buy American Act (41 U.S.C 10) provides that the 
          Government give preference to domestic material. In addition, the
          Trade Agreements Act and the North American Free Trade Agreement
          (NAFTA) provide that designated country and NAFTA construction
          materials are exempted from application of the Buy American Act.

               (c)  The Contractor agrees that only domestic construction 
          materials, NAFTA country construction materials or designated country
          construction materials will be used by the Contractor, subcontractors,
          material men and suppliers in the performance of this contract,
          except for other foreign construction materials, if any, listed in
          this contract.

                                (End of clause)

                                   00700-54
<PAGE>
 
39   52.226-1       UTILIZATION OF INDIAN ORGANIZATIONS AND INDIAN-OWNED 
                    ECONOMIC ENTERPRISES (SEP 1996)

       (a) For Department of Defense contracts, this clause applies only if the 
     contract includes a subcontracting plan incorporated under the terms of the
     clause at 52.219-9. Small, Small Disadvantaged and Women-Owned Small
     Business Subcontracting Plan. It does not apply to contracts awarded based
     on a subcontracting plan submitted and approved under paragraph (g) of the
     clause at 52.219
     
       (b) Definitions. As used in this clause:

       "Indian" means any person who is a member of any Indian tribe, band,
     group, pueblo or community which is recognized by the Federal Government as
     eligible for services from the Bureau of Indian Affairs (BIA) in accordance
     with 25 U.S.C. 1452(c) and any "Native" as defined in the Alaska Native
     Claims Settlement Act (43 U.S.C. 1601).

       "Indian organization" means the governing body of any Indian tribe or
     entity established or recognized by the governing body of an Indian tribe
     for the purposes of 25 U.S.C., Chapter 17.

       "Indian-owned economic enterprise" means any Indian-owned (as determined
     by the Secretary of the Interior) commercial, industrial, or business
     activity established or organized for the purpose of profit, provided that
     Indian ownership shall constitute not less than 51 percent of the
     enterprise.

       "Indian tribe" means any Indian tribe, band, group, pueblo or community, 
     including native villages and native groups (including corporations
     organized by Kenai, Juneau, Sitka, and Kodiak) as defined in the Alaska
     Native Claims Settlement Act, which is recognized by the Federal Government
     as eligible for services from BIA in accordance with 25 U.S.C. 1542(c).

       "Interested party" means a prime contractor or an actual or prospective 
     offeror whose direct economic interest would be affected by the award of a 
     subcontract or by the failure to award a subcontract.

       (c) The Contractor agrees to use its best efforts to give Indian 
     organizations and Indian-owned economic enterprises (25 U.S.C. 1544) the
     maximum practicable opportunity to participate in the subcontracts it
     awards to the fullest extent consistent with efficient performance of its
     contract.

          (1) The Contracting Officer and the Contractor, acting in good faith, 
       may rely on the self-certification of an Indian organization or Indian-
       owned economic enterprise as to its eligibility, unless an interested
       party challenges its status or the Contracting Officer has independent
       reason to question that status. In the event of a challenge

                                   00700-55
<PAGE>
 
          to the self-certification of a subcontractor, the Contracting Officer
          shall refer the matter to the U.S. Department of the Interior, Bureau
          of Indian Affairs (BIA), Attn: Chief, Division of Contracting and
          Grants Administration, 1849 C Street, NW, MS-334A-5IB, Washington, DC
          20245. The BIA will determine the eligibility and notify the
          Contracting Officer. The 5 percent incentive payment will not be made
          within 50 working days of subcontract award or while a challenge is
          pending. If a subcontractor is determined to be an ineligible
          participant, no incentive payment will be made under the Indian
          Incentive Program.

               (2)  The Contractor may request an adjustment under the Indian 
          Incentive Program to the following:

                    (i)   The estimated cost of a cost-type contract.

                    (ii)  The target cost of a cost-plus-incentive-fee prime 
               contract.

                    (iii) The target cost and ceiling price of a fixed-price 
               incentive prime contract.

                    (iv)  The price of a firm-fixed-price prime contract.

               (3)  The amount of the equitable adjustment to the prime contract
          shall be 5 percent of the estimated cost, target cost or firm fixed-
          price included in the subcontract initially awarded to the Indian
          organization or Indian-owned economic enterprise.

               (4)  The Contractor has the burden of proving the amount claimed 
          and must assert its request for an adjustment prior to completion of
          contract performance.

          (d)  The Contracting Officer, subject to the terms and conditions of 
     the contract and the availability of funds, shall authorize an incentive
     payment of 5 percent of the amount paid to the subcontractor. Contracting
     Officers shall seek funding in accordance with agency procedures. The
     Contracting Officer's decision is final and not subject to the Disputes
     clause of this contract.

                                (End of clause)


40   52.227-1      AUTHORIZATION AND CONSENT (JUL 1995)

          (a)  The Government authorizes and consents to all use and 
     manufacture, in performing this contract or any subcontract at any time, of
     any invention described in and covered by a United States patent (1)
     embodied in the structure or composition of any article the delivery of
     which is accepted by the Government under this contract or (2) used in
     machinery, tools, or methods whose use necessarily results from compliance
     by the

                                   00700-56
<PAGE>
 
          Contractor or a subcontractor with (i) specifications of written
          provisions forming a part of this contract or (ii) specific written
          instructions given by the Contracting Officer directing the manner of
          performance. The entire liability to the Government for infringement
          of a patent of the United States shall be determined solely by the
          provisions of the indemnity clause, if any, included in this contract
          or any subcontract hereunder (including any lower-tier subcontract),
          and the Government assumes liability for all other infringement to the
          extent of the authorization and consent hereinabove granted.

               (b)  The Contractor agrees to include, and require inclusion of, 
          this clause, suitably modified to identify the parties, in all
          subcontracts at any tier for supplies or services (including
          construction, architect-engineer services, and materials, supplies,
          models, samples, and design or casting services expected to exceed the
          simplified acquisition threshold), however, omission of this clause
          from any subcontract, including those at or below the simplified
          acquisition threshold, does not affect this authorization and
          consent.

                                (End of Clause)


     41   52.227-2     NOTICE AND ASSISTANCE REGARDING PATENT AND COPYRIGHT 
                       INFRINGEMENT (AUG 1996)

               (a)  The Contractor shall report to the Contracting Officer, 
          promptly and in reasonable written detail, each notice or claim of
          patent or copyright infringement based on the performance of this
          contract of which the Contractor has knowledge.

               (b)  In the event of any claim or suit against the Government on 
          account of any alleged patent or copyright infringement arising out of
          the performance of this contract or out of the use of any supplies
          furnished or work or services performed under this contract, the
          Contractor shall furnish to the Government, when requested by the
          Contracting Officer, all evidence and information in possession of the
          Contractor pertaining to such suit or claim, such evidence and
          information shall be furnished at the expense of the Government except
          where the Contractor has agreed to indemnify the Government.

               (c)  The Contractor agrees to include, and require inclusion of, 
          this clause in all subcontracts at any tier for supplies or services
          (including construction and architect-engineer subcontracts and those
          for material, supplies, models, samples, or design or testing
          services) expected to exceed the simplified acquisition threshold at
          FAR 2.101.

                                   00700-57
<PAGE>
 
                                (End of clause)

     42   52.227-4     PATENT INDEMNITY -- CONSTRUCTION CONTRACTS (APR 1984)

               Except as otherwise provided, the Contractor agrees to indemnify
          the Government and its officers, agents, and employees against
          liability, including costs and expenses, for infringement upon any
          United States patent (except a patent issued upon an application that
          is now or may hereafter be withheld from issue pursuant to a Secrecy
          Order under 35 U.S.C 181) arising out of performing this contract or
          out of the use or disposal by or for the account of the Government of
          supplies furnished or work performed under this contract.

                                (End of clause)

                             (R 7-602.16 1964 JUN)

     43   52.227-11    PATENT RIGHTS -- RETENTION BY THE CONTRACTOR (SHORT FORM)
                       (JUN 1989)

             (a)  Definitions.

                (1)  "Invention" means any invention or discovery which is or
             may be patentable or otherwise protectable under title 35 of the
             United States Code, or any novel variety of plant which is or may
             be protected under the Plant Variety Protection Act (7 U.S.C. 2321,
             et seq.).

                (2)  "Made" when used in relation to any invention means the 
             first actual reduction to practice of such invention.

                (3)  "Nonprofit organization" means a university or other
             institution of higher education or an organization of the type
             described in section 501(c)(3) of the Internal Revenue Code of 1954
             (26 U.S.C. 501(c)) and exempt from taxation under section 501(a) of
             the Internal Revenue Code (26 U.S.C. 501(a)) or any nonprofit
             scientific or educational organization qualified under a State
             nonprofit organization statute.

                (4)  "Practical application" means to manufacture, in the case
             of a composition of product; to practice, in the case of a process
             or method, or to operate, in the case of a machine or system; and,
             in each case, under such conditions as to establish that the
             invention is being utilized and that its benefits are, to the
             extent permitted by law or Government regulations, available to the
             public on reasonable terms.

                (5)  "Small business firm" means a small business concern as
             defined at section 2 of Pub. L. 85-536 (15 U.S.C. 632) and
             implementing regulations of the Administrator of the Small Business
             Administration. For the

<PAGE>
 
          purpose of this clause, the size standards for small business concerns
          involved in Government procurement and subcontracting at 13 CFR 121.3-
          8 and 13 CFR 121.3-12, respectively, will be used.

               (6)  "Subject invention" means any invention of the contractor 
          conceived or first actually reduced to practice in the performance of
          work under this contract, provided that in the case of a variety of
          plant, the date of determination (as defined in section 41(d) of the
          Plant Variety Protection Act, 7 U.S.C. 2401(d)) must also occur during
          the period of contract performance.

          (b)  Allocation of principal rights. The Contractor may retain the 
     entire right, title, and interest throughout the world to each subject
     invention subject to the provisions of this clause and 35 U.S.C. 203. With
     respect to any subject invention which the Contractor retains title, the
     Federal Government shall have a nonexclusive, nontransferable, irrevocable,
     paid-up license to practice or have practiced for or on behalf of the
     United States the subject invention throughout the world.

          (c) Invention disclosure, election of title, and filing of patent
     application by Contractor. (1) The Contractor will disclose each subject
     invention to the Federal agency within 2 months after the inventor
     discloses it in writing to Contractor personnel responsible for patent
     matters. The disclosure to the agency shall be in the form of a written
     report and shall identify the contract under which the invention was made
     and the inventor(s). It shall be sufficiently complete in technical detail
     to convey a clear understanding to the extent known at the time of the
     disclosure, of the nature, purpose, operation, and the physical, chemical,
     biological or electrical characteristics of the invention. The disclosure
     shall also identify any publication, on sale or public use of the invention
     and whether a manuscript describing the invention has been submitted for
     publication and, if so, whether it has been accepted for publication at the
     time of disclosure. In addition, after disclosure to the agency, the
     Contractor will promptly notify the agency of the acceptance of any
     manuscript describing the invention for publication or of any on sale or
     public use planned by the Contractor.

               (2)  The Contractor will elect in writing whether or not to
          retain title disclosure to the Federal agency. However, in any case
          where publication, on sale or public use has initiated the 1-year
          statutory period wherein valid patent protection can still be obtained
          in the United States, the period for election of title may be
          shortened by the agency to a date that is no more than 60 days prior
          to the end of the statutory period.

               (3)  The Contractor will file its initial patent application on
          a 

                                   00700-59
<PAGE>
 
   subject invention to which it elects to retain title within 1 year after
   election if title or, if earlier, prior to the end of any statutory period
   wherein valid patent protection can be obtained in the United States after a
   publication, or sale, or public use. The Contractor will file patent
   applications in additional countries or international patent offices within
   either 10 months of the corresponding initial patent application or 6 months
   from the date permission is granted by the Commissioner of Patents and
   Trademarks to file foreign patent applications where such filing has been
   prohibited by a Secrecy Order.

     (4) Requests for extension of the time for disclosure election, and filing
   under subparagraphs (c) (1), (2), and (3) of this clause may, at the
   discretion of the agency, be granted.
 
   (d) Conditions when the Government may obtain title. The Contractor will
convey to the Federal agency, upon written request, title to any subject
invention--

     (1) If the Contractor fails to disclose or elect title to the subject
   invention within the times specified in paragraph (c) of this clause, or
   elects not to retain title, provided, that the agency may only request title
   within 60 days after learning of the failure of the Contractor to disclose or
   elect within the specified times.

     (2) In those countries in which the Contractor fails to file patent
   applications within the times specified in paragraph (c) of this clause;
   provided, however, that if the Contractor has filed a patent application in a
   country after the times specified in paragraph (c) of this clause, but prior
   to its receipt of the written request of the Federal agency, the Contractor
   shall continue to retain title in that country.

     (3) In any country in which the Contractor decides not to continue the
   prosecution of any application for, to pay the maintenance fees on, or defend
   in reexamination or opposition proceeding on, a patent on a subject
   invention.

   (e)  Minimum rights to Contractor and protection of the Contractor right to 
file. (1) The Contractor will retain a nonexclusive royalty-free license 
throughout the world in each subject invention to which the Government obtains 
title, except if the Contractor fails to disclose the invention within the times
specified in paragraph (c) of this clause. The Contractor's license extends to 
its domestic subsidiary and affiliates, if any, within the corporate structure 
of which the Contractor is a party and includes the right to grant sublicenses 
of the same scope to the extent the Contractor was legally obligated to do so at
the time the contract was awarded. The license is transferable only with the 
approval of the Federal agency, except when transferred to the successor of that
part of the

                                   00700-60
<PAGE>
 
     Contractor's business to which the invention pertains.

          (2)  The Contractor's domestic license may be revoked or modified by
       the funding Federal agency to the extent necessary to achieve expeditious
       practical application of subject invention pursuant to an application for
       an exclusive license submitted in accordance with applicable provisions
       at 37 CFR Part 404 and agency licensing regulations (if any). This
       license will not be revoked in that field of use or the geographical
       areas in which the Contractor has achieved practical application and
       continues to make the benefits of the invention reasonably accessible to
       the public. The license in any foreign country may be revoked or modified
       at the discretion of the funding Federal agency to the extent the
       Contractor, its licensees, or the domestic subsidiaries or affiliates
       have failed to achieve practical application in that foreign country.

          (3)  Before revocation or modification of the license, the funding
       Federal agency will furnish the Contractor a written notice of its
       intention to revoke or modify the license, and the Contractor will be
       allowed 30 days (or such other time as may be authorized by the funding
       Federal agency for good cause shown by the Contractor) after the notice
       to show cause why the license should not be revoked or modified. The
       Contractor has the right to appeal, in accordance with applicable
       regulations in 37 CFR Part 404 and agency regulations, if any, concerning
       the licensing of Government-owned inventions, any decision concerning the
       revocation or modification of the license.

       (f)  Contractor action to protect the Government's interest. (1) The
     Contractor agrees to execute or to have executed and promptly deliver to
     the Federal agency all instruments necessary to (i) establish or confirm
     the rights the Government has throughout the world in those subject
     inventions to which the Contractor elects to retain title, and (ii) convey
     title to the Federal agency when requested under paragraph (d) of this
     clause and to enable the Government to obtain patent protection throughout
     the world in that subject invention.

          (2)  The Contractor agrees to require, by written agreement, its
       employees, other than clerical and nontechnical employees, to disclose
       promptly in writing to personnel identified as responsible for the
       administration of patent matters and in a format suggested by the
       Contractor each subject invention made under contract in order that the
       Contractor can comply with the disclosure provisions of paragraph (c) of
       this clause, and to execute all papers necessary to file patent
       applications on subject inventions and to establish the Government's
       rights in the subject inventions. This disclosure format should

                                   00700-61
<PAGE>
 
     require, as a minimum, the information required by subparagraph (c)(1) of
     this clause. The Contractor shall instruct such employees, through employee
     agreements or other suitable educational programs, on the importance of
     reporting inventions in sufficient time to permit the filing of patent
     applications prior to U.S. or foreign statutory bars.

        (3)  The Contractor will notify the Federal agency of any decisions not
     to continue the prosecution of a patent application, pay maintenance fees,
     or defend in a reexamination or opposition proceeding on a patent, in any
     country, not less than 30 days before the expiration of the response period
     required by the relevant patent office.

        (4)  The Contractor agrees to include within the specification of any
     United States patent application and any patent issuing thereon covering a
     subject invention, the following statement, "This invention was made with
     Government support under (identify the contract) awarded by (identify the
     Federal agency). The Government has certain rights in the invention."

     (g)  Subcontracts.  (1) The Contractor will include this clause, suitably
  modified to identify the parties, in all subcontracts, regardless of tier, for
  experimental, developmental, or research work to be performed by a small
  business firm or domestic nonprofit organization. The subcontractor will
  retain all rights provided for the Contractor in this clause, and the
  Contractor will not, as part of the consideration for awarding the
  subcontract, obtain rights in the subcontractor's subject inventions.

        (2)  The Contractor will include in all other subcontracts, regardless
     of tier, for experimental, developmental, or research work the patent
     rights clause required by Subpart 27.3.

        (3)  In the case of subcontracts, at any tier, the agency,
     subcontractor, and the Contractor agree that the mutual obligations of the
     parties created by this clause constitute a contract between the
     subcontractor and the Federal agency with respect to the matters covered by
     the clause; provided, however, that nothing in this paragraph is intended
     to confer any jurisdiction under the Contract Disputes Act in connection
     with proceeding under paragraph (j) of this clause.

     (h)  Reporting on utilization of subject inventions. The Contractor agrees
  to submit, on request, periodic reports no more frequently than annually on
  the utilization of a subject invention or on efforts at obtaining such
  utilization that are being made by the Contractor or its licensees or
  assignees. Such reports shall include information regarding the status of
  development, date of first commercial sale or use, gross royalties received by
  the Contractor, and such other data and information as the agency may
  reasonably specify. The Contractor also agrees to

                                   00700-62
<PAGE>
 
          provide additional reports as may be requested by the agency in
          connection with any march-in proceeding undertaken by the agency in
          accordance with paragraph (j) of this clause. As required by 35 U.S.C.
          202(c)(5), the agency agrees it will not disclose such information to
          persons outside the Government without permission of the Contractor.

               (i)  Preference of United States industry. Notwithstanding any 
          other provision of this clause, the Contractor agrees that neither it
          nor any assignee will grant to any person the exclusive right to use
          or sell any subject invention in the United States unless such person
          agrees that any product embodying the subject invention or produced
          through the use of the subject invention will be manufactured
          substantially in the United States. However, in individual cases, the
          requirement for such an agreement may be waived by the Federal agency
          upon a showing by the Contractor or its assignee that reasonable but
          unsuccessful efforts have been made to grant licenses on similar terms
          to potential licensees that would be likely to manufacture
          substantially in the Unites states or that under the circumstances
          domestic manufacture is not commercially feasible.

               (j)  March-in rights. The Contractor agrees that, with respect to
          any subject invention in which it has acquired title, the Federal
          agency has the right in accordance with the procedures in 37 CFR 401.6
          and any supplemental regulations of the agency to require the
          Contractor, an assignee or exclusive licensee of a subject invention
          to grant a nonexclusive, partially exclusive, or exclusive license in
          any field of use to a responsible applicant or applicants, upon terms
          that are reasonable under the circumstances, and if the Contractor,
          assignee, or exclusive licensee refuses such a request the Federal
          agency has the right to grant such a license itself if the Federal
          agency determines that--

               (1)  Such action is necessary because the Contractor or assignee
                    has not taken, or is not expected to take within a
                    reasonable time, effective steps to achieve practical
                    application of the subject invention in such field of use;

               (2)  Such action is necessary to alleviate health or safety needs
                    which are not reasonably satisfied by the Contractor,
                    assignee, or their licensees;

               (3)  Such action is necessary to meet requirements for public use
                    specified by Federal regulations and such requirements are
                    not reasonably satisfied by the Contractor, assignee, or
                    licensees; or

               (4)  Such action is necessary because the agreement required by
                    paragraph (i) of this clause has not been obtained or waived
                    or because a licensee of the exclusive right to use or sell
                    any subject invention in the United States is in breach of
                    such agreement.

                                   00700-63
<PAGE>
 
    (k) Special provisions for contracts with nonprofit organizations.  If the 
  Contractor is a nonprofit organisation, it agrees that--

      (1) Rights to a subject invention in the United States may not be assigned
    without the approval of the Federal agency, except where such assignment is
    made to an organization which has as one of its primary functions the
    management of inventions, provided, that such assignee will be subject to
    the same provisions as the Contractor:

      (2) The Contractor will share royalties collected on a subject invention
    with the inventor, including Federal employee co-investors (when the agency
    deems it appropriate) when the subject invention is assigned in accordance
    with the 35 U.S.C. 202(e) and 37 CFR 401.10;

      (3) The balance or any royalties or income earned by the Contractor with
    respect to subject inventions, after payment of expenses (including
    payments to investors) incidental to the administration of subject
    inventions will be utilized for the support of scientific research or
    education; and

      (4) It will make efforts that are reasonable under the circumstances to
    attract licensees of subject inventions that are small business firms, and
    that it will give a preference to a small business firm when licensing a
    subject invention if the Contractor determines that the small business firm
    has a plan or proposal for marketing the invention which, if executed, is
    equally as likely to bring the invention to practical application as any
    plans or proposals from applicants that are not small business firms;
    provided, that the Contractor is also satisfied that the small business firm
    has the capability and resources to carry out its plan or proposal. The
    decision whether to give a preference in any specific case will be at the
    discretion of the contractor. However, the Contractor agrees that the
    Secretary of Commerce may review the Contractor's licensing program and
    decisions regarding small business applicants, and the Contractor will
    negotiate changes to its licensing policies, procedures, or practices with
    the Secretary of Commerce when the Secretary's review discloses that the
    Contractor could take reasonable steps to more effectively implement the
    requirements of this subparagraph (k) (4).

    (1) Communications.

    (Complete according to agency instructions.)

                           (End of clause)


44 52.227-12  PATENT RIGHTS--RETENTION BY THE CONTRACTOR (LONG FORM) (JAN 1997)

                                   00700-64
<PAGE>
 
               (a)  Definitions. "Invention" means any invention or discovery
          which is or may be patentable or otherwise protectable under title 35
          of the United States Code or any novel variety of plant that is or may
          be protectable under the Plant Variety Protection Act (7 U.S.C. 2321,
          et seq.).

               "Made" when used in relation to any invention means the
          conception or first actual reduction to practice of such invention.

               "Nonprofit organization" means a domestic university or other
          institution of higher education or an organization of the type
          described in section 501(c)(3) of the Internal Revenue Code of 1954
          (26 U.S.C. 501(c)) and exempt from taxation under section 501(^) of
          the Internal Revenue Code (26 U.S.C. 501(a)) or any nonprofit
          scientific or educational organization qualified under a state
          nonprofit organization statute.

               "Practical application" means to manufacture in the case of a
          composition or product, to practice in the case of a process or
          method, or to operate in the case of a machine or system; and, in each
          case, under such conditions as to establish that the invention being
          utilized and that its benefits are, to the extent permitted by law or
          Government regulations, available to the public on reasonable terms.

               "Small business firm" means a small business concern as defined
          at section 2 of Pub. L. 85-536 (15 U.S.C. 632) and implementing
          regulations of the Administrator of the Small Business Administration.
          For the purpose of this clause, the size standards for small business
          concerns involved in Government procurement and subcontracting at 13
          CFR 121.3-8 and 13 CFR 121.3-12, respectively, will be used.

               "Subject invention" means any invention of the Contractor
          conceived or first actually reduced to practice in the performance of
          work under this contract: provided, that in the case of a variety of
          plant, the date of determination (as defined in section 41(d) of the
          Plant Variety Protection Act, 7 U.S.C. 2401(d)) must also occur during
          the period of contract performance.
          
               (b)  Allocation of principal rights. The Contractor may elect to
          retain the entire right, title, and interest throughout the world to
          each subject invention subject to the provisions of this clause and 35
          U.S.C. 203. With respect to any subject invention in which the
          Contractor elects to retain title, the Federal Government shall have a
          nonexclusive, nontransferable, irrevocable, paid-up license to
          practice or have practiced for or on behalf of the United States the
          subject invention throughout the world.

               (c)  Invention disclosure, election of title, and filling of
          patent applications by Contractor. (1) The Contractor shall disclose
          each subject invention to the Contracting Officer within 2 months
          after the inventor discloses it in writing to Contractor personnel
          responsible for patent

                                   00700-65
<PAGE>

matters or within 6 months after the Contractor becomes aware that a subject
invention has been made, whichever is earlier.  The disclosure to the 
Contracting Officer shall be in the form of a written report and shall 
identify the contract under which the invention was made and the inventor(s).
It shall be sufficiently complete in technical detail to convey a clear 
understanding, to the extend known at the time of the disclosure, of the nature,
purpose, operation, and physical, chemical, biological, or electrical 
characteristics of the invention.  The disclosure shall also identify any 
publication, on sale, or public use of the invention and whether a manuscript
describing the invention has been submmitted for publication and, if so, whether
it has been accepted for publication at the time of disclosure.  In addition,
after disclosure to the Contracting Officer, the Contractor shall promptly
notify the Contracting Officer of the acceptance of any manuscript describing
the invention for publication or of any on sale or public use planned by the
Contractor.
    
      (2) The Contractor shall elect in writing whether or not to retain
  title to any such invention by notifying the Federal agency at the time of
  disclosure or within 8 months of disclosure, as to those countries (including
  the United States) in which the contractor will retain title; provided, that
  in any case where publication, on sale, or public use has initiated the 1-year
  statutory period wherein valid patent protection can still be obtained in the
  United States, the period of election of title may be shortened by the agency
  to a date that is no more than 60 days prior to the end of the statutory
  period.

      (3) The Contractor shall file its initial patent application on an elected
  invention within 1 year after election or, if earlier, prior to the end of any
  statutory period wherein valid patent protection can be obtained in the United
  States after a publication, on sale, or public use. The Contractor shall file
  patent applications in additional countries (including the European Patent
  Office and under the Patent Cooperation Treaty) within either 10 months of the
  corresponding initial patent application or 6 months from the date permission
  is granted by the Commissioner of Patents and Trademarks to file foreign
  patent applications where such filing has been prohibited by a Secrecy Order.

      (4) Requests for extension of the time for disclosure to the Contracting
  Officer, election, and filing may, at the discretion of the funding Federal
  agency, be granted, and will normally be granted unless the Contracting
  Officer has reason to believe that a particular extension would prejudice the
  Government's interest.

  (d) Conditions when the Government may obtain title. The Contractor shall

                                   00700-66

 































<PAGE>
 
     convey to the Federal agency, upon written request, title to any subject  
     invention--                                                               
                                                                                
          (1)  If the Contractor elects not to retain title to a subject 
        invention;  
                                                                               
          (2)  If the Contractor fails to disclose or elect the subject 
        invention within the times specified in paragraph (c) above (the agency 
        may only request title within 60 days after learning of the 
        Contractor's failure to report or elect within the specified times);   
                                                                               
          (3)  In those countries in which the Contractor fails to file patent
        applications within the times specified in paragraph (c) above;
        provided, however, that if the Contractor has filed a patent application
        in a country after the times specified in paragraph (c) above, but prior
        to its receipt of the written request of the Federal agency, the
        Contractor shall continue to retain title in that country; or
                                                                                
          (4)  In any country in which the Contractor decides not to continue
        the prosecution of any application for, to pay the maintenance fees on,
        or defend in reexamination or opposition proceeding on, a patent on a
        subject invention.
                                                                               
        (e)  Minimum rights to Contractor. (1) The Contractor shall retain a
     nonexclusive, royalty-free license throughout the world in each subject
     invention to which the Government obtains title except if the Contractor
     fails to disclose the subject invention within the time specified in
     paragraph (c) above. The Contractor's license extends to its domestic
     subsidiaries and affiliates, if any, within the corporate structure of
     which the Contractor is a part and includes the right to grant sublicenses
     of the same scope to the extent the Contractor was legally obligated to do
     so at the time the contract was awarded. The license is transferable only
     with the approval of the funding Federal agency except when transferred to
     the successor of that part of the Contractor's business to which the
     invention pertains.
     
          (2)  The Contractor's domestic license may be revoked or modified by
        the funding Federal agency to the extent necessary to achieve to
        expeditious practical application of the subject invention pursuant to
        an application for an exclusive license submitted in accordance with
        applicable provisions in the Federal Property Management Regulations and
        agency licensing regulations (if any). This license shall not be revoked
        in that field of use or the geographical areas in which the Contractor
        has achieved practical application and continues to make the benefits of
        the invention reasonably accessible to the public. The license in any
        foreign country may be revoked or modified at the discretion of the
        funding Federal agency to the extent the Contractor, its licensees, or

                                   00700-67
<PAGE>
 
          its domestic subsidiaries or affiliates have failed to achieve
          practical application in that foreign country.         

               (3)  Before revocation or modification of the license, the
          funding Federal agency shall furnish the Contractor a written notice
          of its intention to revoke or modify the license, and the Contractor
          shall be allowed 30 days (or such other time as may be authorized by
          the funding Federal agency for good cause shown by the Contractor)
          after the notice to show cause why the license should not be revoked
          or modified. The Contractor has the right to appeal, in accordance
          with applicable agency licensing regulations and 37 CFR 404 concerning
          the licensing of Government-owned inventions, any decision concerning
          the revocation or modification of its license.

          (f)  Contractor action to protect the Government's interest. (1) The
     Contractor agrees to execute or to have executed and promptly deliver to
     the Federal agency all instruments necessary to (i) establish or confirm
     the rights the Government has throughout the world in those subject
     inventions to which the Contractor elects to retain title, and (ii) convey
     title to the Federal agency when requested under paragraph (d) above and
     subparagraph (n) (2) below, and to enable the Government to obtain patent
     protection throughout the world in that subject invention.

               (2) The Contractor agrees to require, by written agreement, its
          employees, other than clerical and nontechnical employees, to disclose
          promptly in writing to personnel identified as responsible for the
          administration of patent matters and in a format suggested by the
          Contractor each subject invention made under contract in order that
          the Contractor can comply with the disclosure provision of paragraph
          (c) above, and to execute all papers necessary to file patent
          applications on subject inventions and to establish the Government's
          rights in the subject inventions. This disclosure format should
          require, as a minimum, the information required by subparagraph (c)
          (1) above. The Contractor shall instruct such employees through
          employee agreements or other suitable educational programs on the
          importance of reporting inventions in sufficient time to permit the
          filing of patent applications prior to U.S. or foreign statutory bars.

               (3) The Contractor shall notify the Federal agency of any
          decision not to continue the prosecution of a patent application, pay
          maintainance fees, or defend in a reexamination or opposition
          proceeding on a patent, in any country, not less than 30 days before
          the expiration of the response period required by the relevant patent
          office.

               (4)  The Contractor agrees to include, within the specification 
          of any United States patent application and any patent issuing thereon
          covering

                                   00700-68  
<PAGE>
 
     a subject invention, the following statement: "This invention was made with
     Government support under (identify the contract) awarded by (identify the
     Federal agency). The Government has certain rights in this invention."

          (5)  The Contractor shall establish and maintain active and effective 
     procedures to assure that subject inventions are promptly identified and
     disclosed to Contractor personnel responsible for patent matters within 6
     months of conception and/or first actual reduction to practice, whichever
     occurs first in performance of work under this contract. These procedures
     shall include the maintenance of laboratory notebooks or equivalent records
     and other records as are reasonably necessary to document the conception
     and/or the first actual reduction to practice of subject inventions, and
     records that show that the procedures for identifying and disclosing the
     inventions are followed. Upon request, the Contractor shall furnish the
     Contracting Officer a description of such procedures for evaluation and for
     determination as to their effectiveness.

          (6)  The Contractor agrees, when licensing a subject invention, to 
     arrange to avoid royalty charges on acquisitions involving Government
     funds, including funds derived through Military Assistance Program of the
     Government or otherwise derived through the Government, to refund any
     amounts received as royalty charges on the subject invention in
     acquisitions for, or on behalf of, the Government, and to provide for such
     refund in any instrument transferring rights in the invention to any party.

          (7)  The Contractor shall furnish the Contracting Officer the 
     following:

              (i)   Interim reports every 12 months (or such longer period as 
          may be specified by the Contracting Officer) from the date of the
          contract, listing subject inventions during that period and stating
          that all subject inventions have been disclosed or that there are no
          such inventions.

              (ii)  A final report, within 3 months after completion of the 
          contracted work, listing all subject inventions or stating that there
          were no such inventions, and listing all subcontracts at any tier
          containing a patent rights clause or stating that there were no such
          subcontracts.

          (8) The Contractor shall promptly notify the Contracting Officer in
     writing upon the award of any subcontract at any tier containing a patent
     rights clause by identifying the subcontractor, the applicable patent
     rights clause, the work to be performed under the subcontract, and the
     dates of award and estimated completion. Upon request of the Contracting

                                   00700-69
                     
<PAGE>
      
               Officer, the Contractor shall furnish a copy of such subcontract,
               and no more frequently than annually, a listing of the
               subcontracts that have been awarded.

                    (9)  In the event of a refusal by a prospective
               subcontractor to accept one of the clauses in subparagraph (g)
               (1) or (2) below, the Contractor (i) shall promptly submit a
               written notice to the Contracting Officer setting forth the
               subcontractor's reasons for such refusal and other pertinent
               information that may expedite disposition of the matter and (ii)
               shall not proceed with such subcontracting without the written
               authorization of the Contracting Officer.

                    (10) The Contractor shall provide, upon request, the filing
               date, serial number and title, a copy of the patent application
               (including an English-Language version if filed in a language
               other than English), and patent number and issue date for any 
               subject invention for which the Contractor has retained title.

                    (11) Upon request, the Contractor shall furnish the
               Government an irrevocable power to inspect and make copies of the
               patent application file.

               (g)  Subcontracts. (1) The Contractor shall include the clause at
          52.227-11 of the Federal Acquisition Regulation (FAR), suitably
          modified to identify the parties, in all subcontracts, regardless of
          tier, for experimental, developmental, or research work to be
          performed by a small business firm or nonprofit organization. The
          subcontractor shall retain all rights provided for the Contractor in
          this clause, and the Contractor shall not, as part of the
          consideration for awarding the subcontract, obtain rights in the
          subcontractor's subject inventions.

                    (2)  The Contractor shall include this clause (FAR 52.227-
               12) in all other subcontracts, regardless of tier, for
               experimental, developmental, or research work.

                    (3)  In the case of subcontracts, at any tier, when the
               prime award with the Federal agency was a contract (but not a
               grant or cooperative agreement), the agency, subcontractor, and
               the Contractor agree that the mutual obligations of the parties
               created by this clause constitute a contract between the
               subcontractor and the Federal agency with respect to those
               matters covered by this clause.
          
               (h)  Reporting utilization of subject inventions. The Contractor
          agrees to submit on request periodic reports no more frequently than
          annually on the utilization of a subject invention or on efforts at
          obtaining such utilization that are being made by the Contractor or
          its licensees or assignees. Such reports shall include information
          regarding the status of development, date of first commercial sale or
          use, gross royalties received

                                   00700-70
<PAGE>
 
     by the Contractor, and such other data and information as the agency may
     reasonably specify. The Contractor also agrees to provide additional
     reports as may be requested by the agency in connection with any march-in
     proceedings undertaken by the agency in accordance with paragraph (5) of
     this clause. To the extent data or information supplied under this
     paragraph is considered by the Contractor, its licensee or assignee to be
     privileged and confidential and is so marked, the agency agrees that, to
     the extent permitted by law, it shall not disclose such information to
     persons outside the Government.

          (i)  Preference for United States industry. Notwithstanding any other
     provision of this clause, the Contractor agrees that neither it nor any
     assignee will grant to any person the exclusive right to use or sell any
     subject invention in the United States unless such person agrees that any
     products embodying the subject invention will be manufactured substantially
     in the United States. However, in individual cases, the requirement for
     such an agreement may be waived by the Federal agency upon a showing by the
     Contractor or its assignee that reasonable but unsuccessful efforts have
     been made to grant licenses on similar terms to potential licensees that
     would be likely to manufacture substantially in the United States or that
     under the circumstances domestic manufacture is not commercially feasible.

          (j)  March-in rights. The Contractor agrees that with respect to any
     subject invention in which it has acquired title, the Federal agency has
     the right in accordance with the procedures in FAR 27.304-1(g) to require
     the Contractor, an assignee, or exclusive licensee of a subject invention
     to grant a nonexclusive, partially exclusive, or exclusive license in any
     field of use to a responsible applicant or applicants, upon terms that are
     reasonable under the circumstances, and if the Contractor, assignee, or
     exclusive licensee refuses such a request, the Federal agency has the right
     to grant such a license itself if the Federal agency determines that --

               (1)  Such action is necessary because the Contractor or assignee
          has not taken, or is not expected to take within a reasonable time,
          effective steps to achieve practical application of the subject
          invention in such field of use;

               (2)  Such action is necessary to alleviate health or safety needs
          which are not reasonably satisfied by the Contractor, assignee, or
          their licensees,

               (3)  Such action is necessary to meet requirements for public use
          specified by Federal regulations and such requirements are not
          reasonably satisfied by the Contractor, assignee, or licensees; or

                                   00700-71

<PAGE>
 
               (4)  Such action is necessary because the agreement required by
          paragraph (i) of this clause has not been obtained or waived or
          because a licensee of the exclusive right to use or sell any subject
          invention in the United States is in breach of such agreement.

          (k)  Special provisions for contracts with nonprofit organizations 
     Reserved.

          (l)  Communications.

          (Complete according to agency instructions.)

          (m)  Other inventions. Nothing contained in this clause shall be
     deemed to grant to the Government any rights with respect to any invention
     other than a subject invention.
     
          (n)  Examination of records relating to inventions. (1) The
     Contracting Officer or any authorized representative shall, until 3 years
     after final payment under this contract, have the right to examine any
     books (including laboratory notebooks), records, and documents of the
     Contractor relating to the conception or first reduction to practice of
     inventions in the same field of technology as the work under this contract
     to determine whether--

                    (i)   Any such inventions are subject inventions:

                    (ii)  The Contractor has established and maintains the
               procedures required by subparagraphs (f) (2) and (f) (3) of this
               clause; and

                    (iii) The Contractor and its inventors have complied with
               the procedures.

               (2)  If the Contracting Officer determines that an investor has
          not disclosed a subject invention to the Contractor in accordance with
          the procedures required by subparagraph (f) (5) of this clause, the
          Contracting Officer may, within 60 days after the determination,
          request title in accordance with subparagraphs (d) (2) and (d) (3) of
          this clause. However if the Contractor established that the failure to
          disclose did no result from the Contractor's fault or negligence, the
          Contracting Officer shall not request title.

               (3)  If the Contracting Officer learns of an unreported
          Contractor invention which the Contracting Officers believes may be a
          subject invention, the Contractor may be required to disclose the
          invention to the agency for a determination of ownership rights.

               (4)  Any examination of records under this paragraph shall be
          subject to appropriate conditions to protect the confidentiality of
          the information involved.

          (o)  Withholding of payment (this paragraph does not apply to
     subcontracts). (1) Any time before final payment under this contract; the
     Contracting Officer may, in the Government's interest, withhold payment
     until a reserve not exceeding $50,000 or 5 percent of the amount of the

                                   00700-72
<PAGE>
 
     contract, whichever is less, shall have been set aside if, in the 
     Contracting Officer's opinion, the Contractor fails to--

               (i)   Establish, maintain, and follow effective procedures for 
          identifying and disclosing subject inventions pursuant to subparagraph
          (f) (5) above;

               (ii)  Disclose any subject invention pursuant to subparagraph (c)
          (1) above;

               (iii) Deliver acceptable interim reports pursuant to subdivision 
          (f) (7) (i) above; or

               (iv) Provide the information regarding subcontracts pursuant to 
          subparagraph (f) (8) of this clause.

          (2)  Such reserve or balance shall be withheld until the Contracting 
     Officer has determined that the Contractor has rectified whatever
     deficiencies exist and has delivered all reports, disclosures, and other
     information required by this clause.

          (3)  Final payment under this contract shall not be made before the 
     Contractor delivers to the Contracting officer all disclosures of subject
     inventions required by subparagraph (c) (1) above, an acceptable final
     report pursuant to subdivision (f) (7) (ii) above, and all past due
     confirmatory instruments.

          (4)  The Contracting Officer may decrease or increase the sums
     withheld up to the maximum authorized above. No amount shall be withheld
     under this paragraph while the amount specified by this paragraph is being
     withheld under other provisions of the contract. The withholding of any
     amount or the subsequent payment thereof shall not be construed as a waiver
     of any Government right.

                                (End of clause)

45 52.228-2            ADDITIONAL BOND SECURITY (JUN 1996)     

     The Contractor shall promptly furnish additional security required to 
   protect the Government and persons supplying labor or materials under this 
   contract if--

     (a)  Any surety upon any bond, or issuing financial institution for other 
   security, furnished with this contract becomes unacceptable to the
   Government;

     (b)  Any surety fails to furnish reports on its financial condition as 
   required by the Government;

     (c)  The contract price is increased so that the penal sum of any bond 
   becomes inadequate in the opinion of the Contracting Officer; or 

                                   00700-73
<PAGE>
 
               (d)  The contract performance period is extended and an
          irrevocable letter of credit (ILC) is used as security. If the
          Contractor does not furnish an acceptable extension or replacement
          ILC, or other acceptable substitute, at least 30 days before an ILC's
          scheduled expiration, the Contracting Officer has the right to
          immediately draw on the ILC.

                                (End of clause)

     46   52.228-11           PLEDGES OF ASSETS (FEB 1992)

               (a)  Offerors shall obtain from each person acting as an 
          individual surety on a bid guarantee, a performance bond, or a payment
          bond--

                    (1)  Pledge of assets; and

                    (2)  Standard Form 28, Affidavit of Individual Surety,

               (b)  Pledges of assets from each person acting as an individual 
          surety shall be in the form of--

                    (1)  Evidence of an escrow account containing cash, 
               certificates of deposit, commercial or Government securities, or
               other assets described in FAR 28.203-2 (except see 28.203-2 (b)
               (2) with respect to Government securities held in book entry
               form) and/or;

                    (2)  A recorded lien on real estate. The offeror will be 
               required to provide--

                         (i)   Evidence of title in the form of a certificate of
                    title prepared by a title insurance company approved by the
                    United States Department of Justice. This title evidence
                    must show fee simple title vested in the surety along with
                    any concurrence owners; whether any real estate taxes are
                    due and payable, and any recorded encumbrances against the
                    property, including the lien filed in favor of the
                    Government as required by FAR 28.203-2 (d);

                         (ii)  Evidence of the amount due under any encumbrance 
                    shown in the evidence of title;

                         (iii) A copy of the current real estate tax assessment 
                    of the property or a current appraisal dated no earlier than
                    6 months prior to the date of the bond, prepared by a
                    professional appraiser who certifies that the appraisal has
                    been conducted in accordance with the generally accepted
                    appraisal standards as reflected in the Uniform Standards of
                    Professional Appraisal Practice, as promulgaged by the
                    Appraisal Foundation.

                                (End of clause)

                                   00700-74

<PAGE>
 
     47   52.229-3       FEDERAL, STATE, AND LOCAL TAXES (JAN 1991)

               (a)  "Contract date," as used in this clause, means the date set
          for bid opening or, if this is a negotiated contract or a
          modification, the effective date of this contract or modification.

               "All applicable Federal, State, and legal taxes and duties," as 
          used in this clause, means all taxes and duties, in effect on the
          contract date, that the taxing authority is imposing and collecting on
          the transactions or property covered by this contract.

               "After-imposed Federal tax," as used in this clause, means any 
          new or increased Federal excise tax or duty, or tax that was exempted
          or excluded on the contract date but whose exemption was later revoked
          or reduced during the contract period, on the transactions or property
          covered by this contract that the Contractor is required to pay or
          bear as the result of legislative, judicial, or administrative action
          taking effect after the contract date. It does not include social
          security tax or other employment taxes.

               "After-relieved Federal tax," as used in this clause, means any 
          amount of Federal excise tax or duty, except social security or other
          employment taxes, that would otherwise have been payable on the
          transactions or property covered by this contract, but which the
          Contractor is not required to pay or bear, or for which the Contractor
          obtains a refund or drawback, as the result of legislative, judicial,
          or administrative action taking effect after the contract date.

               (b)  The contract price includes all applicable Federal, State, 
          and local taxes and duties.

               (c)  The contract price shall be increased by the amount of any 
          after-imposed Federal tax, provided the Contractor warrants in writing
          that no amount for such newly imposed Federal excise tax or duty or
          rate increase was included in the contract price, as a contingency
          reserve or otherwise.

               (d)  The contract price shall be decreased by the amount of any 
          after-relieved Federal tax.

               (e)  The contract price shall be decreased by the amount of any 
          Federal excise tax or duty, except social security or other employment
          taxes, that the Contractor is required to pay or bear, or does not
          obtain a refund of, through the Contractor's fault, negligence, or
          failure to follow instructions of the Contracting Officer.

               (f)  No adjustment shall be made in the contract price under this
          clause unless the amount of the adjustment exceeds 5250.

               (g)  The Contractor shall promptly notify the Contracting Officer
          of all matters relating to any Federal excise tax or duty that
          reasonably may be

                                   00700-75

<PAGE>
 
          expected to result in either an increase or decrease in the contract
          price and shall take appropriate action as the Contracting Officer
          directs.

               (h)  The Government shall, without liability, furnish evidence 
          appropriate to establish exemption from any Federal, State, or local
          tax when the Contractor requests such evidence and a reasonable basis
          exists to sustain the exemption.

                                (End of clause)


     48   52.229-5       TAXES--CONTRACTS PERFORMED IN U.S. POSSESSIONS OR 
                         PUERTO RICO (APR 1994)

               The term "local taxes," as used in the Federal, State, and local
          taxes clause of this contract, includes taxes imposed by a possession
          of the United States or by Puerto Rico.

                                (End of Clause)

                           (AV 7-103.10(c) 1963 NOV)

                               (AV 1-11.401-3(a))


     49   52.232-5       PAYMENTS UNDER FIXED-PRICE CONSTRUCTION CONTRACTS (APR 
                         1989)

               (a)  The Government shall pay the Contractor the contract price 
          as provided in this contract.

               (b)  The Government shall make progress payments monthly as the 
          work proceeds, or at more frequent intervals as determined by the
          Contracting Officer, on estimates of work accomplished which meets the
          standards of quality established under the contract, as approved by
          the Contracting Officer. The Contractor shall furnish a breakdown of
          the total contract price showing the amount included therein for each
          principal category of the work, which shall substantiate the payment
          amount requested in order to provide a basis for determining progress
          payments, in such detail as requested by the Contracting Officer. In
          the preparation of estimates the Contracting Officer may authorize
          material delivered on the site and preparatory work done to be taken
          into consideration. Material delivered to the Contractor at locations
          other than the site may also be taken into consideration if--

               (1)  Consideration is specifically authorized by this contract; 
          and 

               (2)  The Contractor furnishes satisfactory evidence that it has 
          acquired title to such material and that the material will be used to
          perform this contract.

                                   00700-76

<PAGE>
 
               (c)  Along with each request for progress payments, the 
          contractor shall furnish the following certification, or payment shall
          not be made:

                 I hereby certify, to the best of my knowledge and belief, 
                 that--

                 (1)   The amounts requested are only for performance in 
               accordance with the specifications, terms, and conditions of the
               contract;

                 (2)   Payments to subcontractors and suppliers have been made 
               from previous payments received under the contract, and timely
               payments will be made from the proceeds of the payment covered by
               this certification, in accordance with subcontract agreements and
               the requirements of chapter 39 of Title 31, United States Code;
               and

                 (3)   This request for progress payments does not include any 
               amounts which the prime contractor intends to withhold or retain
               from a subcontractor or supplier in accordance with the terms and
               conditions of the subcontract.

                       _________________________
                       (Name)

                       _________________________
                       (Title)

                       _________________________
                       (Date)

               (d)  If the Contractor, after making a certified request for 
          progress payments, discovers that a portion or all of such request
          constitutes a payment for performance by the Contractor that fails to
          conform to the specifications, terms, and conditions of this contract
          (hereinafter referred to as the "unearned amount"), the Contractor
          shall--

                 (1)   Notify the Contracting Officer of such performance 
               deficiency; and

                 (2)   Be-obligated to pay the Government an amount (computed by
               the Contracting Officer in the manner provided in 31 U.S.C
               3903(c) (1)) equal to interest on the unearned amount from the
               date of receipt of the unearned amount until--

                       (i)  The date the Contractor notifies the Contracting 
                 Officer that the performance deficiency has been corrected; or

                       (ii) The date the Contractor reduces the amount of any 
                 subsequent certified request for progress payments by an amount
                 equal to the unearned amount.

               (e)  If the Contracting Officer finds that satisfactory progress 
          was achieved during any period for which a progress payment is to be
          made, the Contracting Officer shall authorize payment to be made in
          full. However, if satisfactory progress has not been made, the
          Contracting Officer may retain a maximum of 10 percent of the amount
          of the payment until

                                   00700-77

<PAGE>
 
          satisfactory progress is achieved. When the work is substantially
          complete, the Contracting Officer may retain from previously withheld
          funds and future progress payments that amount the Contracting Officer
          considers adequate for protection of the Government and shall release
          to the Contractor all the remaining withheld funds. Also, on
          completion and acceptance of each separate building, public work, or
          other division of the contract, for which the price is stated
          separately in the contract, payment shall be made for the completed
          work without retention of a percentage.

               (f)  All material and work covered by progress payments made 
          shall, at the time of payment, become the sole property of the
          Government, but this shall not be construed as--

                    (1)  Relieving the Contractor from the sole responsibility 
               for all material and work upon which payments have been made or
               the restoration of any damaged work; or
               
                    (2)  Waiving the right of the Government to require the 
               fulfillment of all of the terms of the contract.

               (g)  In making these progress payments, the Government shall,
          upon request, reimburse the Contractor for the amount of premiums paid
          for performance and payment bonds (including coinsurance and
          reinsurance agreements, when applicable) after the Contractor has
          furnished evidence of full payment to the surety. The retainage
          provisions in paragraph (e) of this clause shall not apply to that
          portion of progress payments attributable to bond premiums.

               (h)  The Government shall pay the amount due the Contractor under
          this contract after--

                    (1)  Completion and acceptance of all work;

                    (2)  Presentation of a properly executed voucher; and 

                    (3)  Presentation of release of all claims against the
               Government arising by virtue of this contract, other than claims,
               in stated amounts, that the Contractor has specifically excepted
               from this operation of the release. A release may also be
               required of the assignee if the Contractor's claim to amounts
               payable under this contract has been assigned under the
               Assignment of Claims Act of 1940 (31 U.S.C. 3727 and 41 U.S.C.
               15).

               (i)  Notwithstanding any provision of this contract, progress 
          payments shall not exceed 80 percent on work accomplished on
          undefinitized contract actions. A "contract action" is any action
          resulting in a contract, as defined in FAR Subpart 2.1, including
          contract modifications for additional supplies or services, but not
          including contract modifications that are within the scope and under
          the terms of the contract, such as contract modifications issued
          pursuant to the Changes clause, or funding and other

                                   00700-78

<PAGE>
 
          administrative changes

                                (End of clause)



     50   52.232-17     INTEREST (JUN 1996)


               (a)  Except as otherwise provided in this contract under a Price 
          Reduction for Defective Cost or Pricing Data clause or a Cost
          Accounting Standards Clause, all amounts that become payable by the
          Contractor to the Government under this contract (net of any
          applicable tax credit under the Internal Revenue Code (26 U.S.C.
          1481)) shall bear simply interest from the date due until paid unless
          paid within 30 days of becoming due. The interest rate shall be the
          interest rate established by the Secretary of the Treasury as provided
          in Section 12 of the Contract Disputes Act of 1978 (Public Law 95-
          563), which is applicable to the period in which the amount becomes
          due, as provided in paragraph (b) of this clause, and then at the rate
          applicable for each six-month period as fixed by the Secretary until
          the amount is paid.

               (b)  Amounts shall be due at the earliest of the following dates:

                 (1) The date fixed under this contract.

                 (2) The date of the first written demand for payment consistent
               with this contract, including any demand resulting from a default
               termination.

                 (3) The date the Government transmits to the Contractor a
               proposed supplemental agreement to confirm completed negotiations
               establishing the amount of debt.

                 (4) If this contract provides for revision of prices, the date
               of written notice to the Contractor stating the amount of refund
               payable in connection with a pricing proposal or a negotiated
               pricing agreement not confirmed by contract modification.

               (c)  The interest charge made under this clause may be reduced
          under the procedures prescribed in 32.614-2 of the Federal Acquisition
          Regulation in effect on the date of this contract.

                                (End of clause)


     51   52.232-23     ASSIGNMENT OF CLAIMS (JAN 1986)

               (a)  The Contractor, under the Assignment of Claims Act, as 
          amended, 31 U.S.C. 3727, 41 U.S.C. 15 (hereafter referred to as "the
          Act"), may assign its rights to be paid amounts due or to become due
          as a result of the performance of this contract to a bank, trust
          company, or other financing

                                   00700-79

<PAGE>
 
     institution, including any Federal lending agency. The assignee under such
     an assignment may thereafter further assign or reassign its right under the
     original assignment to any type of financing institution described in the
     preceding sentence.

          (b)  Any assignment or reassignment authorized under the Act and this 
     clause shall cover all unpaid amounts payable under this contract, and
     shall not be made to more than one party, except that an assignment or
     reassignment may be made to one party as agent or trustee for two or more
     parties participating in the financing of this contract.

          (c)  The Contractor shall not furnish or disclose to any assignee 
     under this contract any classified document (including this contract) or
     information related to work under this contract until the Contracting
     Officer authorizes such action in writing.

                                (End of clause)

52   52.232-27       PROMPT PAYMENT FOR CONSTRUCTION CONTRACTS (MAR 1994)

          Notwithstanding any other payment terms in this contract, the 
     Government will make invoice payments and contract financing payments under
     the terms and conditions specified in this clause. Payment shall be
     considered as being made on the day a check is dated or an electronic funds
     transfer is made. Definitions of pertinent terms are set forth in 32.902.
     All days referred to in this clause are calendar days, unless otherwise
     specified.

          (a)  Invoice Payments.

               (1)  For purposes of this clause, there are several types of 
          invoice payments which may occur under this contract, as follows:

                    (i)  Progress payments, if provided for elsewhere in this 
               contract, based on Contracting Officer approval of the estimated
               amount and value of work or services performed, including
               payments for reaching milestones in any project;

                         (A)  The due date for making such payments shall be 14 
                    days after receipt of the payment request by the designated
                    billing office. However, if the designated billing office
                    fails to annotate the payment request with the actual date
                    of receipt, the payment due date shall be deemed to be the
                    14th day after the date the Contractor's payment request is
                    dated, provided a proper payment request is received and
                    there is no disagreement over quantity, quality, or
                    Contractor compliance with contract requirements.

                         (B)  The due date for payment of any amounts retained 
                    by the Contracting Officer in accordance with the clause at 
                    52.232-8,

                                   00700-80
                         
<PAGE>
 
          Payments Under Fixed-Price Construction Contracts, shall be as
          specified in the Contract or, if not specified, 30 days after approval
          for release to the Contractor by the Contracting Officer.

          (ii) Final payments based on completion and acceptance of all work and
     presentation of release of all claims against the Government arising by
     virtue of the contract, and payments for partial deliveries that have been
     accepted by the Government (e.g., each separate building, public work, or
     other division of the contract for which the price is stated seperately in
     the contract).
     
               (A)  The due date for making such payments shall be either the 
          30th day after receipt by the designated billing office of a proper
          invoice from the Contractor, or the 30th day after Government
          acceptance of the work or services completed by the Contractor,
          whichever is later. However, if the designated billing office fails to
          annotate the invoice with the date of actual receipt, the invoice
          payment due shall be deemed to be the 30th day after the date the
          Contractor's invoice is dated, provided a proper invoice is received
          and there is no disagreement over quantity, quality, or Contractor
          compliance with contract requirements.

               (B)  On a final invoice where the payment amount is subject to 
          contract settlement actions (e.g., release of claims), acceptance
          shall be deemed to have occurred on the effective date of the contract
          settlement.

          (2)  An invoice is the Contractor's bill or written request for 
     payment under the contract for work or services performed under the
     contract. An invoice shall be prepared and submitted to the designated
     billing office. A proper invoice must include the items listed in
     subdivisions (a) (2) (i) through (a) (2) (ix) of this clause. If the
     invoice does not comply with these requirements, the Contractor will be
     notified of the defect within 7 days after receipt of the invoice at the
     designated billing office. Untimely notification will be taken into account
     in the computation of any interest penalty owed the Contractor in the 
     manner described in subparagraph (a) (4) of this clause:

               (i)   Name and address of the Contractor.

               (ii)  Invoice date.

               (iii) Contract number or other authorization for work or services
          performed (including order number and contract line item number).

               (iv)  Description of work or services performed.

               (v)   Delivery and payment terms (e.g., prompt payment discount 
          terms).

               (vi)  Name and address of Contractor official to whom payment is 
          to be sent (must be the same as that in the contract or in a proper 
          notice of

                                   00700-81
<PAGE>
 
          assignment).                                                        
                                                                              
               (vii)  Name (where practicable), title, phone number, and mailing
          address of person to be notified in event of a defective invoice.
                                                                              
               (viii) For payments described in subdivision (a) (1) (i) of this
          clause, substantiation of the amounts requested and certification in
          accordance with the requirements of the clause at 52.232-5. Payments
          Under Fixed-Price Construction Contracts.
                                                                              
               (ix)   Any other information or documentation required by the  
          contract.                                                           
                                                                              
          (3)  An interest penalty shall be paid automatically by the designated
     payment office, without request from the Contractor, if payment is not made
     by the due date and the conditions listed in subdivisions (a) (3) (i)
     through (a) (3) (iii) of this clause are met, if applicable.

               (i)    A proper invoice was received by the designated billing 
          office.

               (ii)   A receiving report or other Government documentation 
          authorizing payment was processed and there was no disagreement over
          quantity, quality, Contractor compliance with any contract term or
          condition, or requested progress payment amount.

               (iii)  In the case of a final invoice for any balance of funds
          due the Contractor for work or services performed, the amount was not
          subject to further contract settlement actions between the Government
          and the Contractor.
          
          (4)  The interest penalty shall be at the rate established by the 
     Secretary of the Treasury under section 12 of the Contract Disputes Act of
     1978 (41 U.S.C. 611) that is in effect on the day after the due date,
     except where the interest penalty is prescribed by other governmental
     authority. This rate is referred to as the "Renegotiation Board Interest
     Rate," and it is published in the Federal Register semiannually on or about
     January 1 and July 1. The interest penalty shall accrue daily on the
     invoice payment amount approved by the Government and be compounded in 30-
     day increments inclusive from the first day after the due date through the
     payment date. That is, interest accrued at the end of any 30-day period
     will be added to the approved invoice payment amount and be subject to
     interest penalties if not paid in the succeeding 30-day period. If the
     designated billing office failed to notify the Contractor of a defective
     invoice within the periods prescribed in subparagraph (a) (2) of this
     clause, then the due date on the corrected invoice will be adjusted by
     subtracting the number of days taken beyond the prescribed notification of
     defects period. Any interest penalty owed the Contractor will be based on
     this adjusted due date. Adjustments will be made by the designated payment
     office for errors in calculating interest penalties, if requested by the
     Contractor.

                                   00700-82
<PAGE>
 
               (i)  For the sole purpose of computing an interest penalty that 
          might be due the Contractor for payments described in subdivision (a)
          (1) (ii) of this clause, Government acceptance or approval shall be
          deemed to have occurred constructively on the 7th day after the
          Contractor has completed the work or services in accordance with the
          terms and conditions of the contract. In the event that actual
          acceptance or approval occurs within the constructive acceptance or
          approval period, the determination of an interest penalty shall be
          based on the actual date of acceptance or approval. Constructive
          acceptance or constructive approval requirements do not apply if there
          is a disagreement over quantity, quality, or Contractor compliance
          with a contract provision. These requirements also do not compel
          Government officials to accept work or services, approve Contractor
          estimates, perform contract administration functions, or make payment
          prior to fulfilling their responsibilities.

               (ii)  The following periods of time will not be included in the 
          determination of an interest penalty.

                     (A)  The period taken to notify the Contractor of defects
               in invoices submitted to the Government, but this may not exceed
               7 days.

                     (B)  The period between the defects notice and resubmission
               of the corrected invoice by the Contractor.

               (iii) Interest penalties will not continue to accrue after the 
          filing of a claim for such penalties under the clause at 52.233-1.
          Disputes, or for more than 1 year. Interest penalties of less than
          $1.00 need not be paid.

               (iv)  Interest penalties are not required on payment delays due 
          to disagreement between the Government and Contractor over the payment
          amount or other issues involving contract compliance, or on amounts
          temporarily withheld or retained in accordance with the terms of the
          contract. Claims involving disputes, and any interest that may be
          payable, will be resolved in accordance with the clause at 52.233-1,
          Disputes.

          (5)  An interest penalty shall also be paid automatically by the 
     designated payment office, without request from the Contractor, if a
     discount for prompt payment is taken improperly. The interest penalty will
     be calculated on the amount of discount taken for the period beginning with
     the first day after the end of the discount period through the date when
     the Contractor is paid.

          (6)  If this contract was awarded on or after October 1, 1989, a 
     penalty amount, calculated in accordance with regulations issued by the
     Office of

                                   00700-83
<PAGE>
 
          Management and Budget, shall be paid in addition to the interest
          penalty amount if the Contractor--

                    (i)    Is owed an interest penalty:

                    (ii)   Is not paid the Interest penalty within 10 days after
               the date the invoice amount is paid; and;

                    (iii)  Makes a written demand, not later than 40 days after
               the date the invoice amount is paid, that the agency pay such a
               penalty.
          
          (b)  Contract Financing Payments.

               (1)  For purposes of this clause, if applicable, "contract
          financing payment" means a Government disbursement of monies to a
          Contractor under a contract clause or other authorization prior to
          acceptance of supplies or services by the Government, other than
          progress payments based on estimates of amount and value of work
          performed. Contract financing payments include advance payments and
          interim payments under cost-type contracts.

               (2)  If this contract provided for contract financing, requests
          for payment shall be submitted to the designated billing office as
          specified in this contract or as directed by the Contracting Officer.
          Contract financing payments shall be made on this ______ day after
          receipt of a proper contract financing request by the designated
          billing office. In the event that an audit or other review of a
          specific financing request is required to ensure compliance with the
          terms and conditions of the contract, the designated payment office is
          not compelled to make payment by the due specified. For advance
          payments, loans, or other arrangements that do not involve recurrent
          submissions of contract financing requests payment shall be made in
          accordance with the corresponding contract terms or as directed by the
          Contracting Officer. Contract financing payments shall not be assessed
          an interest penalty for payment delays.

          (c)  The Contractor shall include in each subcontract for property or
     services (including a material supplier) for the purpose of performing this
     contract the following:

               (1)  A payment clause which obligates the Contractor to pay the
          subcontractor for satisfactory performance under its subcontract not
          later than 7 days from receipt of payment out of such amounts as are
          paid to the Contractor under this contract.

               (2)  An interest penalty clause which obligates the Contractor to
          pay the subcontractor an interest penalty for each payment not made in
          accordance with the payment clause--

                    (i)  For the period beginning on the day after the required
          payment date and ending on the date on which payment of the amount due
          is made;

                                   00700-84

<PAGE>
 
                    and

                         (ii) Computed at the rate of interest established by
                    the Secretary of the Treasury, and published in the Federal
                    Register, for interest payments under section 12 of the
                    Contract Disputes Act of 1978 (41 U.S.C. 611) in effect at
                    the time the Contractor accrues the obligation to pay an
                    interest penalty.

                    (3)  A clause requiring each subcontractor to include a
               payment clause and an interest penalty clause conforming to the
               standards set forth in subparagraphs (c) (1) and (c) (2) of this
               clause in each of its subcontracts, and to require each of its
               subcontractors to include such clauses in their subcontracts with
               each lower-tier subcontractor or supplier.

               (d)  The clauses required by paragraph (c) of this clause shall
          not be construed to impair the right of Contractor or a subcontractor
          at any tier to negotiate, and to include in their subcontract,
          provisions which--

                    (1) Permit the Contractor or a subcontractor to retain
               (without cause) a specified percentage of each progress payment
               otherwise due to a subcontractor for satisfactory performance
               under the subcontract without incurring any obligation to pay a
               late payment interest penalty, in accordance with terms and
               conditions agreed to by the parties to the subcontract, giving
               such recognition as the parties deem appropriate to the ability
               of a subcontractor to furnish a performance bond and a payment
               bond;

                    (2)  Permit the Contractor or subcontractor to make a
               determination that part or all of the subcontractor's request for
               payment may be withheld in accordance with the subcontract
               agreement; and

                    (3)  Permit such withholding without incurring any
               obligation to pay a late payment penalty if--

                         (i)  A notice conforming to the standards of paragraph
               (g) of this clause has been previously furnished to the
               subcontractor: and

                         (ii) A copy of any notice issued by a Contractor
               pursuant to subdivision (d) (3) (i) of this clause has been
               furnished to the Contracting Officer.

               (e)  If a Contractor, after making a request for payment to the
          Government but before making a payment to a subcontractor for the
          subcontractor's performance covered by the payment request, discovers
          that all or a portion of the payment otherwise due such subcontractor
          is subject to withholding from the subcontractor in accordance with
          the subcontract agreement, then the Contractor shall--

                    (1)  Furnish to the subcontractor a notice conforming to the
               standards of paragraph (g) of this clause as soon as practicable
               upon ascertaining

                                   00700-85
<PAGE>
 
          the cause giving rise to a withholding, but prior to the due date for 
          subcontractor payment;

               (2)  Furnish to the Contracting Officer, as soon as practicable,
          a copy of the notice furnished to the subcontractor pursuant to
          subparagraph (e) (1) of this clause;

               (3)  Reduce the subcontractor's progress payment by an amount not
          to exceed the amount specified in the notice of withholding furnished
          under subparagraph (e) (1) of this clause;

               (4)  Pay the subcontractor as soon as practicable after the 
          correction of the identified subcontract performance deficiency, and--

                 (i)  Make such payment within--
 
                      (A) Seven days after correction of the identified 
                 subcontract performance deficiency (unless the funds therefor
                 must be recovered from the Government because of a reduction
                 under subdivision (e) (5) (i)) of this clause; or

                      (B) Seven days after the Contractor recovers such funds
                 from the Government; or

                 (ii) Incur an obligation to pay a late payment interest
               penalty computed at the rate of interest established by the
               Secretary of the Treasury, and published in the Federal Register,
               for interest payments under section 12 of the Contracts Disputes
               Act of 1978 (41 U.S.C. 611) in effect at the time the Contractor
               accrues the obligation to pay an interest penalty;

               (5)  Notify the Contracting Officer upon--

                  (i) Reduction of the amount of any subsequent certified 
               application for payment; or

                  (ii) Payment to the subcontractor of any withheld amounts of a
               progress payment, specifying --

                     (A) The amounts withheld under subparagraph (e) (1) of this
                  clause; and

                     (B) The dates that such withholding began and ended; and
               
               (6)  Be obligated to pay to the Government an amount equal to 
          interest on the withheld payments (computed in the manner provided in
          31 U.S.C. 3903 (c) (1)), from the 8th day after receipt of the
          withheld amounts from the Government until --

                  (i) The day the identified subcontractor performance 
               deficiency is corrected; or

                  (ii) The date that any subsequent payment is reduced under 
               subdivision (e) (5) (i) of this clause,

          (f) (1) If a Contractor, after making payment to a first-tier 
        subcontractor, receives from a supplier or subcontractor of the first-
        tier

                                   00700-86
<PAGE>
 
     subcontractor (hereafter referred to as a "second-tier subcontractor") a
     written notice in accordance with section 2 of the Act of August 24, 1925
     (40 U.S.C. 270b, Miller Act), asserting a deficiency in such first-tier
     subcontractor's performance under the contract for which the Contractor may
     be ultimately liable, and the Contractor determines that all or a portion
     of future payments otherwise due such first-tier subcontractor is subject
     to withholding in accordance with the subcontract agreement, then the
     Contractor may, without incurring an obligation to pay an interest penalty
     under subparagraph (a) (6) of this clause--

                    (i)  Furnish to the first-tier subcontractor a notice
               conforming to the standards of paragraph (g) of this clause as
               soon as practicable upon making such determination; and

                    (ii) Withhold from the first-tier subcontractor's next
               available progress payment or payments an amount not to exceed
               the amount specified in the notice of withholding furnished under
               subdivision (f) (1) (i) of this clause.

               (2)  As soon as practicable, but not later than 7 days after
          receipt of satisfactory written notification that the identified
          subcontract performance deficiency has been corrected, the Contractor
          shall pay the amount withheld under subdivision (f) (1) (ii) of this
          clause to such first-tier subcontractor, or shall incur an obligation
          to pay a Late payment interest penalty to such first-tier
          subcontractor computed at the rate of interest established by the
          Secretary of the Treasury, and published in the Federal Register, for
          interest payments under section 12 of the Contracts Disputes Act of
          1978 (41 U.S.C. 611) in effect at the time the Contractor accrues
          the obligation to pay an interest penalty.

          (g)  A written notice of any withholding shall be issued to a
     subcontractor (with a copy to the Contracting Officer of any such notice
     issued by the Contractor), specifying--

            (1) The amount to be withheld;

            (2) The specific causes for the withholding under the terms of the
          subcontract; and

            (3) The remedial actions to be taken by the subcontractor in order 
          to receive payment of the amounts withheld.

          (h) The Contractor may not request payment from the Government of any
     amount withheld or retained in accordance with paragraph (d) of this clause
     until such time as the Contractor has determined and certified to the
     Contracting Officer that the subcontractor is entitled to the payment of
     such amount.

          (i) A dispute between the Contractor and subcontractor relating to the
     amount or entitlement of a subcontractor to a payment or a late payment


                                   00700-87
<PAGE>
 
     interest penalty under a clause included in the subcontract pursuant to
     paragraph (c) of this clause does not constitute a dispute to which the
     United States is a party. The United States may not be interpleaded in any
     judicial or administrative proceeding involving such a dispute.           

          (j)  Except as provided in paragraph (i) of this clause, this clause
     shall not limit or impair any contractual, administrative, or judicial
     remedies otherwise available to the Contractor or a subcontractor in the
     event of a dispute involving late payment or nonpayment by the Contractor
     or deficient subcontract performance or nonperformance by a subcontractor.
                                                                                
          (k)  The Contractor's obligation to pay an interest penalty to a
     subcontractor pursuant to the clauses included in a subcontract under
     paragraph (c) of this clause shall not be construed to be an obligation of
     the United States for such interest penalty. A cost reimbursement claim may
     not include any amount for reimbursement of such interest penalty.
                                                                                
                               (End of Clause)          
                            
53   52.233-1       DISPUTES (OCT 1995)                                         
                                                                                
          (a)  This contract is subject to the Contract Disputes Act of 1978, 
     as amended (41 U.S.C. 601-613).                                      
                                                                                
          (b)  Except as provided in the Act, all disputes arising under or     
     relating to this contract shall be resolved under this clause.             
                                                                                
          (c)  "Claim," as used in this clause, means a written demand or
     written assertion by one of the contracting parties seeking, as a matter of
     right, the payment of money in a sum certain, the adjustment or
     interpretation of contract terms, or other relief arising under or relating
     to this contract. A claim arising under a contract, unlike a claim relating
     to that contract, is a claim that can be resolved under a contract clause
     that provides for the relief sought by the claimant. However, a written
     demand or written assertion by the Contractor seeking the payment of money
     exceeding $100,000 is not a claim under the Act until certified as required
     by subparagraph (d) (z) of this clause. A voucher, invoice, or other
     routine request for payment that is not in dispute when submitted is not a
     claim under the Act. The submission may be converted to a claim under the
     Act, by complying with the submission and certification requirements of
     this clause, if it is disputed either as to liability or amount or is not
     acted upon in a reasonable time.
                                                                                
          (d)  (1) A claim by the Contractor shall be made in writing and,
     unless otherwise stated in this contract, submitted within 6 years after
     accrual of the claim to the Contracting officer for a written decision. A
     claim by

                                   00700-88
<PAGE>
 
          the Government against the Contractor shall be subject to a written 
          decision by the Contracting Officer.

               (2) (i)   Contractors shall provide the certification specified
               in subparagraph (d) (2) (iii) of this clause when submitting any
               claim--

                    (A)  Exceeding $100,000; or 

                    (B)  Regardless of the amount claimed, when using--

                      (1)  Arbitration conducted pursuant to S U.S.C. 575-580;
                    or

                      (2)  Any other alternative means of dispute resolution 
                   (ADR) technique that the agency elects to handle in
                   accordance with the Administrative Dispute Resolution Act
                   (ADRA).

                   (ii)  The certification requirement does not apply to issues
               in controversy that have not been submitted as all or part of a
               claim.

                   (iii) The certification shall state as follows:

               "I certify that the claim is made in good faith; that the
               supporting data are accurate and complete to the best of my
               knowledge and belief; that the amount requested accurately
               reflects the contract adjustment for which the Contractor
               believes the Government is liable; and that I am duly authorized
               to certify the claim on behalf of the Contractor."

               (3)  The certification may be executed by any person duly 
          authorized to bind the Contractor with respect to the claim.

          (e)  For Contractor claims of $100,000 or less, the Contracting 
     Officer must, if requested in writing by the Contractor, render a decision
     within 60 days of the request. For Contractor-certified claims over
     $100,000, the Contracting Officer must, within 60 days, decide the claim
     or notify the Contractor of the date by which the decision will be made.

          (f)  The Contracting Officer's decision shall be final unless the 
     Contractor appeals or files a suit as provided in the Act.

          (g)  If the claim by the Contractor is submitted to the Contracting 
     Officer or a claim by the Government is presented to the Contractor, the
     parties, by mutual consent, may agree to use ADR. If the Contractor refuses
     an offer for alternative disputes resolution, the Contractor shall inform
     the Contracting Officer, in writing, of the Contractor's specific reasons
     for rejecting the request. When using arbitration conducted pursuant to S
     U.S.C. 575-580, or when using any other ADR technique that the agency
     elects to handle in accordance with ADRA, any claim, regardless of amount,
     shall be accomplished by the certification described in subparagraph
     (d) (2) (iii) of this clause, and executed in accordance with subparagraph
     (d) (3) of this clause.

          (h)  The Government shall pay interest on the amount found due and 
     unpaid from (1) the date that the Contracting Officer receives the claim
     (certified, if required); or (2) the date that payment otherwise would be

                                   00700-89

<PAGE>
 
     due, if that date is later, until the date of payment. With regard to
     claims having defective certifications, as defined in (FAR) 48 CFR 33.201,
     interest shall be paid from the date that the Contracting Officer initially
     receives the claim. Simple interest on claims shall be paid at the rate,
     fixed by the Secretary of the Treasury as provided in the Act, which is
     applicable to the period during which the Contracting Officer receives the
     claim and then at the rate applicable for each 6-month period as fixed by
     the Treasury Secretary during the pendency of the claim.
     
          (i)  The Contractor shall proceed diligently with performance of this
     contract, pending final resolution of any request for relief, claim,
     appeal, or action arising under the contract, and comply with any decision
     of the Contracting Officer.
                                                                                
                                (End of clause)                                
                                                                                
54   52.233-3       PROTEST AFTER AWARD (AUG 1996)                              
                                                                                
          (a)  Upon receipt of a notice of protest (as defined in FAR 33.101) or
     a determination that a protest is likely (see FAR 33.102 (d)), the
     Contracting Officer may, by written order to the Contractor, direct the
     Contractor to stop performance of the work called for by this contract. The
     order shall be specifically identified as a stop-work order issued under
     this clause. Upon receipt of the order, the Contractor shall immediately
     comply with its terms and take all reasonable steps to minimize the
     incurrence of costs allocable to the work covered by the order during the
     period of work stoppage. Upon receipt of the final decision in the protest,
     the Contracting Officer shall either--
                                                                                
               (1)  Cancel the stop-work; or                                    
                                                                                
               (2)  Terminate the work covered by the order as provided in the
          Default, or the Termination for Convenience of the Government, clause
          of this contract.
                                                                                
          (b)  If a stop-work order issued under this clause is canceled either
     before or after a final decision in the protest, the Contractor shall
     resume work. The Contracting Officer shall make an equitable adjustment in
     the delivery schedule or contract price, or both, and the contract shall be
     modified, in writing, accordingly, if--

               (1) The stop-work order results in an increase in the time
          required for, or in the Contractor's cost properly allocable to, the
          performance of any part of this contract; and
                                                                                
               (2) The Contractor asserts its right to an adjustment within 30
          days after the end of the period of work stoppage; provided, that if
          the
          
                                   00700-90
<PAGE>
 
          Contracting Officer decides the facts justify the action, the
          Contracting Officer may receive and act upon a proposal at any time
          before final payment under this contract.

          (c) If a stop-work order is not canceled and the work covered by the
     order is terminated for the convenience of the Government, the Contracting
     Officer shall allow reasonable costs resulting from the stop-work order in
     arriving at the termination settlement.

          (d) If a stop-work order is not canceled and the work covered by the
     order is terminated for default, the Contracting Officer shall allow, by
     equitable adjustment or otherwise, reasonable costs resulting from the 
     stop-work order.

          (e) The Government's rights to terminate this contract at any time are
     not affected by action taken under this clause.

          (f) If, as the result of the Contractor's intentional or negligent
     misstatement, misrepresentation, or miscertification, a protest related to
     this contract is sustained, and the Government pays costs, as provided in
     FAR 33.102 (b)(2) or 33.104 (h)(1), the Government may require the
     Contractor to reimburse the Government the amount of such costs. In
     addition to any other remedy available, and pursuant to the requirements of
     Subpart 32.6, the Government may collect this debt by offsetting the amount
     against any payment due the Contractor under any contract between the
     Contractor and the Government.

                             (End of clause)


55   52.236-2        DIFFERING SITE CONDITIONS (APR 1984)


          (a) The Contractor shall promptly, and before the conditions are
     disturbed, give a written notice to the Contracting Officer of (1)
     subsurface or latent physical conditions at the site which differ
     materially from those indicated in this contract, or (2) unknown physical
     conditions at the site, of an unusual nature, which differ materially from
     those ordinarily encountered and generally recognized as inhering in work
     of the character provided for in the contract.

          (b) The Contracting Officer shall investigate the site conditions
     promptly after receiving the notice. If the conditions do materially so
     differ and cause an increase or decrease in the Contractor's cost of, or
     the time required for, performing any part of the work under this contract,
     whether or not changed as a result of the conditions, an equitable
     adjustment shall be made under this clause and the contract modified in
     writing accordingly.
     
                                   00700-91

<PAGE>
 
       (c) No request by the Contractor for an equitable adjustment to the
     contract under this clause shall allowed, unless the Contractor has given
     the written notice required; provided, that the time prescribed in (a)
     above for giving written notice may be extended by the Contracting Officer.

       (d) No request by the Contractor for an equitable adjustment to the
     contract for differing site conditions shall be allowed if made after final
     payment under this contract.

                         (End of clause)

56   52.236-3  SITE INVESTIGATION AND CONDITIONS AFFECTING THE WORK (APR 1984)
 

       (a) The Contractor acknowledges that it has taken steps reasonably
     necessary to ascertain the nature and location of the work, and that it has
     investigated and satisfied itself as to the general and local conditions
     which can affect the work or its cost, including but not limited to (1)
     conditions bearing upon transportation, disposal, handling, and storage of
     materials; (2) the availability of labor, water, electric power, and roads,
     (3) uncertainties of weather, river stages, tides, or similar physical
     conditions at the site; (4) the conformation and conditions of the ground;
     and (5) the character of equipment and facilities needed preliminary to and
     during work performance. The Contractor also acknowledges that it has
     satisfied itself as to the character, quality and quantity of surface and
     subsurface materials or obstacles to be encountered insofar as this
     information is reasonably ascertainable from an inspection of the site,
     including all exploratory work done by the Government, as well as from the
     drawings and specifications made a part of this contract. Any failure of
     the Contractor to take the actions described and acknowledged in this
     paragraph will not relieve the Contractor from responsibility for
     estimating properly the difficulty and cost of successfully performing the
     work, or for proceeding to successfully perform the work without additional
     expense to the Government.

       (b) The Government assumes no responsibility for any conclusions or
     interpretations made by the Contractor based on the information made
     available by the Government. Nor does the Government assume responsibility
     for any understanding reached or representation made concerning conditions
     which can affect the work by any of its officers or agents before the
     execution of this contract, unless that understanding or representation is
     expressly stated in this contract.

                                   00700-92

<PAGE>
 
                                (End of clause)

57   52.236-5        MATERIAL AND WORKMANSHIP (APR 1984)

          (a) All equipment, material, and articles incorporated into the work 
     covered by this contract shall be new and of the most suitable grade for
     the purpose intended, unless otherwise specifically provided in this
     contract. References in the specifications to equipment, material,
     articles, or patented processes by trade name, make, or catalog number,
     shall be regarded as establishing a standard of quality and shall not be
     construed as limiting competition. The Contractor may, at its option, use
     any equipment, material, article, or process that, in the judgment of the
     Contracting Officer, is equal to that named in the specifications, unless
     otherwise specifically provided in this contract.

          (b) The Contractor shall obtain the Contracting Officer's approval of 
     the machinery and mechanical and other equipment to be incorporated into
     the work. When requesting approval, the Contractor shall furnish to the
     Contracting Officer the name of the manufacturer, the model number, and
     other information concerning the performance, capacity, nature, and rating
     of the machinery and mechanical and other equipment. When required by this
     contract or by the Contracting Officer, the Contractor shall also obtain
     the Contracting Officer's approval of the material or articles which the
     Contractor contemplates incorporating into the work. When requesting
     approval, the Contractor shall provide full information concerning the
     material or articles. When directed to do so, the Contractor shall submit
     samples for approval at the Contractor's expense, with all shipping charges
     prepaid. Machinery, equipment, material, and articles that do not have the
     required approval shall be installed or used at the risk of subsequent
     rejection.

          (c) All work under this contract shall be performed in a skillful and 
     workmanlike manner. The Contracting Officer may require, in writing, that
     the Contractor remove from the work any employee the Contracting Officer
     deems incompetent, careless, or otherwise objectionable.
                                
                                (End of clause)

                             (R 7-602.9 1964 JUN)

58   52.236-6         SUPERINTENDENCE BY THE CONTRACTOR (APR 1984)   

          At all times during performances of this contract and until the work 
     is
                                   00700-93
<PAGE>
 
     completed and accepted, the Contractor shall directly superintend the work
     or assign and have on the work site a competent superintendent who is
     satisfactory to the Contracting Officer and has authority to act for the
     Contractor.

                                (End of Clause)

59   52.236-7       PERMITS AND RESPONSIBILITIES (NOV 1991)

       The Contractor shall, without additional expense to the Government, be 
     responsible for obtaining any necessary licenses and permits, and for
     complying with any Federal, State, and municipal laws, codes, and
     regulations applicable to the performing of the work. The Contractor shall
     also be responsible for all damages to persons or property that occur as a
     result of the Contractor's fault or negligence. The Contractor shall also
     be responsible for all materials delivered and work performed until
     completion and acceptance of the entire work, except for any completed unit
     of work which may have been accepted under the contract.

                                (End of clause)

60   52.236-8       OTHER CONTRACTS (APR 1984)

       The Government may undertake or award other contracts for additional work
     at or near the site of the work under this contract. The Contractor shall
     fully cooperate with the other contractors and with Government employees
     and shall carefully adapt scheduling and performing the work under this
     contract to accommodate the additional work, needing any direction that may
     be provided by the Contracting Officer. The Contractor shall not commit or
     permit any act that will interfere with the performance of work by any
     other contractor or by Government employees.

                                (End of clause)

61   52.236-9       PROTECTION OF EXISTING VEGETATION, STRUCTURES, EQUIPMENT,
                    UTILITIES, AND IMPROVEMENTS (APR 1984)

       (a)  The Contractor shall preserve and protect all structures, equipment,
     and vegetation (such as trees, shrubs, and grass) on or adjacent to the 
     work site, which are not to be removed and which do not unreasonably
     interfere with the work required under this contract. The Contractor

                                   00700-94
<PAGE>
 
     shall only remove trees when specifically authorized to do so, and shall
     avoid damaging vegetation that will remain in place. If any limbs or
     branches of trees are broken during contract performance, or by the
     careless operation of equipment, or by workmen, the Contractor shall trim
     those limbs or branches with a clean cut and paint the cut with a tree-
     pruning compound as directed by the Contracting Officer.

       (b)  The Contractor shall protect from damage all existing improvements
     and utilities (1) at or near the work site, and (2) on adjacent property of
     a third party, the locations of which are made known to or should be known
     by the Contractor. The Contractor shall repair any damage to those
     facilities, including those that are the property of a third party,
     resulting from failure to comply with the requirements of this contract or
     failure to exercise reasonable care in performing the work. If the
     Contracting fails or refuses to repair the damage promptly, the Contractor
     Officer may have the necessary work performed and charge the cost to the
     Contractor.

                                (End of clause)


62   52.236-10      OPERATIONS AND STORAGE AREAS (APR 1984)

       (a)  The Contractor shall confine all operations (including storage of 
     materials) on Government premises to areas authorized or approved by the
     Contracting Officer. The Contractor shall hold and save the Government, its
     officers and agents, free and harmless from liability of any nature
     occasioned by the Contractor's performance.

       (b)  Temporary buildings (e.g., storage sheds, shops, offices) and 
     utilities may be erected by the Contractor only with the approval of the
     Contracting Officer and shall be built with labor and materials furnished
     by the Contractor without expense to the Government. The temporary
     buildings and utilities shall remain the property of the Contractor and
     shall be removed by the Contractor at its expense upon completion of the
     work. With the written consent of the Contracting Officer, the buildings
     and utilities may be abandoned and need not be removed.

       (c)  The Contractor shall, under regulations prescribed by the 
     Contracting Officer, use only established roadways, or use temporary
     roadways constructed by the Contractor when and as authorized by the
     Contracting Officer. When materials are transported in prosecuting the
     work, vehicles shall not be loaded beyond the leading capacity recommended
     by the manufacturer of the vehicle or prescribed by any Federal, State, or
     local
     
                                   00700-95

<PAGE>
 
     law or regulation. When it is necessary to cross curbs or sidewalks, the
     Contractor shall protect them from damage. The Contractor shall repair or
     pay for the repair of any damaged curbs, sidewalks, or roads.

                                (End of clause)

63   52.236-11      USE AND POSSESSION PRIOR TO COMPLETION (APR 1984)

       (a)  The Government shall have the right to take possession of or use any
     completed or partially completed part of the work. Before taking possession
     of or using any work, the Contracting Officer shall furnish the Contractor
     a list of items of work remaining to be performed or corrected on those
     portions of the work that the Government intends to take possession of or
     use. However, failure of the Contracting Officer to list any item of work
     shall not relieve the Contractor of responsibility for complying with the
     terms of the contract. The Government's possession or use shall not be
     deemed an acceptance of any work under the contract.

       (b)  While the Government has such possession or use, the Contractor 
     shall be relieved of the responsibility for the loss of or damage to the
     work resulting from the Government's possession or use, notwithstanding the
     terms of the clause in this contract entitled "Permits and
     Responsibilities." If prior possession or use by the Government delays the
     progress of the work or causes additional expense to the Contractor, an
     equitable adjustment shall be made in the contract price or the time of
     completion, and the contract shall be modified in writing accordingly.

                                (End of clause)

64   52.236-12      CLEANING UP (APR 1984)

       The Contractor shall at all times keep the work area, including storage 
     areas, free from accumulations of waste materials. Before completing the
     work, the Contractor shall remove from the work and premises any rubbish,
     tools, scaffolding, equipment, and materials that are not the property of
     the Government. Upon completing the work, the Contractor shall leave the
     work area in a clean, neat, and orderly condition satisfactory to the
     Contracting Officer.

                                (End of clause)

                                   00700-96
<PAGE>
 
     65   52.236-13 I    ACCIDENT PREVENTION (NOV 1991)--ALTERNATE I (NOV 1991)


               (a)  The Contractor shall provide and maintain work environments
          and procedures which will (1) safeguard the public and Government
          personnel, property, materials, supplies, and equipment exposed to
          Contractor operations and activities; (2) avoid interruptions of
          Government operations and delays in project completion dates; and (3)
          control costs in the performance of this contract.

               (b)  For these purposes on contracts for construction or 
          dismantling, demolition, or removal of improvements, the Contractor
          shall--

                 (1) Provide appropriate safety barricades, signs, and signal 
               lights;

                 (2) Comply with the standards issued by the Secretary of Labor 
               at 29 CFR Part 1926 and 29 CFR Part 1910; and

                 (3) Ensure that any additional measures the Contracting Officer
               determines to be reasonably necessary for the purposes are taken,

               (c)  If this contract is for construction or dismantling, 
          demolition or removal of improvements with any Department of Defense
          agency or component, the Contractor shall comply with all pertinent
          provisions of the latest version of U.S. Army Corps of Engineers
          Safety and Health Requirements Manual, EM 385-1-1, in effect on the
          date of the solicitation.

               (d)  Whenever the Contracting Officer becomes aware of any 
          noncompliance with these requirements or any condition which poses a
          serious or imminent danger to the health or safety of the public or
          Government personnel, the Contracting Officer shall notify the
          Contractor orally, with written confirmation, and request immediate
          initiation of corrective action. This notice, when delivered to the
          Contractor or the Contractor's representative at the work site, shall
          be deemed sufficient notice of the noncompliance and that corrective
          action is required. After receiving the notice, the Contractor shall
          immediately take corrective action. If the Contractor fails or refuses
          to promptly take corrective action, the Contracting Officer may issue
          an order stopping all or part of the work until satisfactory
          corrective action has been taken. The Contractor shall not be entitled
          to any equitable adjustment of the contract price or extension of the
          performance schedule on any stop order issued under this clause.

               (e)  The Contractor shall insert this clause, including this 
          paragraph (e), with appropriate changes in the designation of the 
          parties, in subcontracts.

               (f)  Before commencing the work, the Contractor shall--

                 (1) Submit a written proposed plan for implementing this 
               clause. The plan shall include an analysis of the significant
               hazards to life, limb,

                                   00700-97
<PAGE>
 
          and property inherent in contract work performance and a plan for 
          controlling these hazards; and

               (2)  Meet with representatives of the Contracting Officer to 
          discuss and develop a mutual understanding relative to administration
          of the overall safety program.

                                (End of clause)


66   52.236-15           SCHEDULES FOR CONSTRUCTION CONTRACTS (APR 1984)

          (a)  The Contractor shall, within five days after the work commences 
     on the contract or another period of time determined by the Contracting
     Officer, prepare and submit to the Contracting Officer for approval three
     copies of a practicable schedule showing the order in which the Contractor
     proposes to perform the work, and the dates on which the Contractor
     contemplates starting and completing the several salient features of the
     work (including acquiring materials, plant, and equipment). The schedule
     shall be in the form of a progress chart of suitable scale to indicate
     appropriately the percentage of work scheduled for completion by any given
     date during the period. If the Contractor fails to submit a schedule within
     the time prescribed, the Contracting Officer may withhold approval of
     progress payments until the Contractor submits the required schedule.

          (b)  The Contractor shall enter the actual progress on the chart as 
     directed by the Contracting Officer, and upon doing so shall immediately
     deliver three copies of the annotated schedule to the Contracting Officer.
     If, in the opinion of the Contracting Officer, the Contractor falls behind
     the approved schedule, the Contractor shall take steps necessary to improve
     its progress, including those that may be required by the Contracting
     Officer, without additional cost to the Government. In this circumstance,
     the Contracting Officer may require the Contractor to increase the number
     of shifts, overtime operations, days of work, and/or the amount of
     construction plant, and to submit for approval any supplementary schedule
     or schedules in chart form as the Contracting Officer deems necessary to
     demonstrate how the approved rate of progress will be regained.

          (c)  Failure of the Contractor to comply with the requirements of the 
     Contracting Officer under this clause shall be grounds for a determination
     by the Contracting Officer that the Contractor is not prosecuting the work
     with sufficient diligence to ensure completion within the time specified in
     the contract. Upon making this determination, the Contracting Officer may
     terminate the Contractor's right to proceed with the work, or any separable
     part of it, in accordance with the default terms of this contract.

                                   00700-98

<PAGE>
 
                                (End of clause)


67   52.236-17      LAYOUT OF WORK (APR 1984)

          The Contractor shall lay out its work from Government-established 
     base lines and bench marks indicated on the drawings, and shall be
     responsible for all measurements in connection with the layout. The
     Contractor shall furnish, at its own expense, all stakes, templates,
     platforms, equipment, tools, materials, and labor required to lay out any
     part of the work. The Contractor shall be responsible for executing the
     work to the lines and grades that may be established or indicated by the
     Contracting Officer. The Contractor shall also be responsible for
     maintaining and preserving all stakes and other marks established by the
     Contracting Officer until authorized to remove them. If such marks are
     destroyed by the Contractor or through its negligence before their removal
     is authorized, the Contracting Officer may replace them and deduct the
     expense of the replacement from any amounts due or to become due to the
     Contractor.

                                (End of clause)

                             (R 7-604.3 1965 JAN)


68   52.236-21 I    SPECIFICATIONS AND DRAWINGS FOR CONSTRUCTION (FEB 1997) 
                    -- ALTERNATE I (APR 1984)

          (a)  The Contractor shall keep on the work site a copy of the drawings
     and specifications and shall at all times give the Contracting Officer
     access thereto. Anything mentioned in the specifications and not shown on
     the drawings, or shown on the drawings and not mentioned in the
     specifications, shall be of like effect as if shown or mentioned in both.
     In case of difference between drawings and specifications, the
     specifications shall govern. In case of discrepancy in the figures, in the
     drawings, or in the specifications, the matter shall be promptly submitted
     to the Contracting Officer, who shall promptly make a determination in
     writing. Any adjustment by the Contractor without such a determination
     shall be at its own risk and expense. The Contracting Officer shall furnish
     from time to time such detailed drawings and other information as
     considered necessary, unless otherwise provided.

          (b)  Wherever in the specifications or upon the drawings the words 
     "directed", "required", "ordered", "designated", "prescribed", or words of
     like import are used, it shall be understood that the "direction",

                                   00700-99

<PAGE>
 
          "requirement", "order", "designation", or "prescription", of the
          Contracting Officer is intended and similarly the words "approved",
          "acceptable", "satisfactory", or words of like import shall mean
          "approved by," or "acceptable to", or "satisfactory to" the
          Contracting Officer, unless otherwise expressly stated.

               (c)  Where "as shown", "as indicated", "as detailed", or words of
          similar import are used, it shall be understood that the reference is
          made to the drawings accompanying this contract unless stated
          otherwise. The word "provided" as used herein shall be understood to
          mean "provide complete in place," that is "furnished and installed".

               (d)  Shop drawings means drawings, submitted to the Government by
          the Contractor, subcontractor, or any lower tier subcontractor
          pursuant to a construction contract, showing in detail (1) the
          proposed fabrication and assembly of structural elements, and (2) the
          installation (i.e., fit and attachment details) of materials or
          equipment. It includes drawings, diagrams, layouts, schematics,
          descriptive literature, illustrations, schedules, performance and test
          data, and similar materials furnished by the contractor to explain in
          detail specific portions of the work required by the contract. The
          Government may duplicate, use, and disclose in any manner and for any
          purpose shop drawings delivered under this contract.

               (e)  If this contract requires shop drawings, the Contractor 
          shall coordinate all such drawings, and review them for accuracy,
          completeness, and compliance with contract requirements and shall
          indicate its approval thereon as evidence of such coordination and
          review. Shop drawings submitted to the Contracting Officer without
          evidence of the Contractor's approval may be returned for
          resubmission. The Contracting Officer will indicate an approval or
          disapproval of the shop drawings and if not approved as submitted
          shall indicate the Government's reasons therefor. Any work done before
          such approval shall be at the Contractor's risk. Approval by the
          Contracting Officer shall not relieve the Contractor from
          responsibility for any errors or omissions in such drawings, nor from
          responsibility for complying with the requirements of this contract,
          except with respect to variations described and approved in accordance
          with (f) below.

               (f)  If shop drawings show variations from the contract 
          requirements, the Contractor shall describe such variations in
          writing, separate from the drawings, at the time of submission. If the
          Contracting Officer approves any such variation, the Contracting
          Officer shall issue an appropriate contract modification, except that,
          if the variation is minor or does not involve a change in price or in
          the time of performance, a modification need not be issued.

                                   00700-100
<PAGE>
 
          (g)  The Contractor shall submit to the Contracting Officer for
     approval four copies (unless otherwise indicated) of all shop drawings as
     called for under the various headings of these specifications. Three sets
     (unless otherwise indicated) of all shop drawings, will be retained by the
     Contracting Officer and one set will be returned to the Contractor. Upon
     completing the work under this contract, the Contractor shall furnish a
     complete set of all shop drawings as finally approved. These drawings shall
     show all changes and revisions made up to the time the equipment is
     completed and accepted.

                                (End of clause)


69   52.236-26      PRECONSTRUCTION CONFERENCE (FEB 1995)

          If the Contracting Officer decides to conduct a preconstruction
     conference, the successful offeror will be notified and will be required to
     attend. The Contracting Officer's notification will include specific
     details regarding the date, time, and location of the conference, any need
     for attendance by subcontractors, and information regarding the items to be
     discussed.

                                (End of clause)


70   52.242-13      BANKRUPTCY (JUL 1995)

          In the event the Contractor enters into proceedings relating to
     bankruptcy, whether voluntary or involuntary, the Contractor agrees to
     furnish, by certified mail or electronic commerce method authorized by the
     contract, written notification of the bankruptcy to the Contracting Officer
     responsible for administering the contract. This notification shall be
     furnished within five days of the initiation of the proceedings relating to
     bankruptcy filing. This notification shall include the date on which the
     bankruptcy petition was filed, the identity of the court in which the
     bankruptcy petition was filed, and a listing of Government contract numbers
     and contracting offices for all Government contracts against which final
     payment has not been made. This obligation remains in effect until final
     payment under this contract.

                                (End of clause)

                                   00700-101
<PAGE>

71   52.242-14           SUSPENSION OF WORK (APR 1984)

        (a)    The Contracting Officer may order the Contractor, in writing, to 
     suspend, delay, or interrupt all or any part of the work of this contract
     for the period of time that the Contracting Officer determines appropriate
     for the convenience of the Government.

        (b)    If the performance of all or any part of the work is, for an 
     unreasonable period of time, suspended, delayed, or interrupted (1) by an
     act of the Contracting Officer in the administration of this contract, or
     (2) by the Contracting Officer's failure to act within the time specified
     in this contract (or within a reasonable time if not specified), an
     adjustment shall be made for any increase in the cost of performance of
     this contract (excluding profit) necessarily caused by the unreasonable
     suspension, delay, or interruption, and the contract modified in writing
     accordingly. However, no adjustment shall be made under this clause for any
     suspension, delay, or interruption to the extent that performance would
     have been so suspended, delayed, or interrupted by any other cause,
     including the fault or negligence of the Contractor, or for which an
     equitable adjustment is provided for or excluded under any other term or
     condition of this contract.

        (c)    A claim under this clause shall not be allowed (1) for any costs 
     incurred more than 20 days before the Contractor shall have notified the
     Contracting Officer in writing of the act or failure to act involved (but
     this requirement shall not apply as to a claim resulting from a suspension
     order), and (2) unless the claim, in an amount stated, is asserted in
     writing as soon as practicable after the termination of the suspension,
     delay, or interruption, but not later than the date of final payment under
     the contract.

                                (End of clause)

72   52.243-4            CHANGES (AUG 1987)

        (a)    The Contracting Officer may, at any time, without notice to the 
     sureties, if any, by written order designated or indicated to be a change
     order, make changes in the work within the general scope of the contract,
     including changes--

             (1)  In the specifications (including drawings and designs);

             (2)  In the method or manner of performance of the work;

             (3)  In the Government-furnished facilities, equipment, materials, 
     services, or site; or

                                   00700-102
<PAGE>
 
          (4) Directing acceleration in the performance of the work.

        (b) Any other written or oral order (which, as used in this paragraph
     (b), includes direction, instruction, interpretation, or determination)
     from the Contracting Officer that causes a change shall be treated as a
     change order under this clause; provided, that the Contractor gives the
     Contracting Officer written notice stating (1) the date, circumstances, and
     source of the order and (a) that the Contractor regards the order as a
     change order.

        (c) Except as provided in this clause, no order, statement, or conduct
     of the Contracting Officer shall be treated as a change under this clause
     or entitle the Contractor to an equitable adjustment.

        (d) If any change under this clause causes an increase or decrease in
     the Contractor's cost of, or the time required for the performance of any
     part of the work under this contract, whether or not changed by any such
     order, the Contracting Officer shall make an equitable adjustment and 
     modify the contract in writing. However, except for an adjustment based on
     defective specifications, no adjustment for any change under paragraph (b)
     of this clause shall be made for any costs incurred more than 20 days
     before the Contractor gives written notice as required. In the case of
     defective specifications for which the Government is responsible, the
     equitable adjustment shall include any increased cost reasonably incurred
     by the Contractor in attempting to comply with the defective
     specifications.

        (e) The Contractor must assert its right to an adjustment under this
     clause within 30 days after (1) receipt of a written change order under
     paragraph (a) of this clause or (2) the furnishing of a written notice
     under paragraph (b) of this clause, by submitting to the Contracting
     Officer a written statement describing the general nature and amount of the
     proposal, unless this period is extended by the Government. The statement
     of proposal for adjustment may be included in the notice under paragraph
     (b) above.

        (f) No proposal by the Contractor for an equitable adjustment shall be
     allowed if asserted after final payment under this contract.

                                (End of clause)

73   S2.244-1   SUBCONTRACTS (FIXED-PRICE CONTRACTS) (FEB 1995)

        (a) This clause does not apply to fi??-fixed-price contracts and fixed-
     price contracts with economic price adjustment. However, it does apply to 
     subcontracts resulting from unpriced modifications to such contracts.

        (b) "Subcontract," as used in this clause, includes but is not limited

                                   00700-103
<PAGE>
 
     to purchase orders, and changes and modifications to purchase orders. The
     Contractor shall notify the Contracting Officer reasonably in advance of
     entering into any subcontract if the Contractor does not have an approved
     purchasing system and if the subcontract--

          (1) Is proposed to exceed $100,000; or

          (2) Is one of a number of subcontracts with a single subcontractor, 
        under this contract, for the same or related supplies or services, that
        in the aggregate are expected to exceed $100,000.

        (c) The advance notification required by paragraph (b) above shall 
     include--

          (1) A description of the supplies or services to be subcontracted; 

          (2) Identification of the type of subcontract to be used;

          (3) Identification of the proposed subcontractor and an explanation of
        why and how the proposed subcontractor was selected, including the
        competition obtained;

          (4) The proposed subcontract price and the Contractor's cost or price 
        analysis;

          (5) The subcontractor's current, complete, and accurate cost or
       pricing data and Certificate of Current Cost or Pricing Data, if required
       by other contract provisions;

          (6) The subcontractor's Disclosure Statement or Certificate relating
       to Cost Accounting Standards when such data are required by other
       provisions of this contract; and

          (7) A negotiation memorandum reflecting--

            (i)   The principal elements of the subcontract price negotiations;

            (ii)  The most significant considerations controlling establishment
          of initial or revised prices;

            (iii) The reason cost or pricing data were or were not required;

            (iv)  The extent, if any, to which the Contractor did not rely on
          the subcontractor's cost or pricing data in determining the price
          objective and in negotiating the final price;

            (v)   The extent, if any, to which it was recognized in the
          negotiation that the subcontractor's cost or pricing data were not
          accurate, complete, or current; the action taken by the Contractor and
          subcontractor; and the effect of any such defective data on the total
          price negotiated;

            (vi)  The reasons for any significant difference between the 
          Contractor's price objective and the price negotiated; and

            (vii) A complete explanation of the incentive fee or profit plan
          when incentives are used. The explanation shall identify each critical
          performance element, management decisions used to quantify

                                   00700-104
<PAGE>
 
          each incentive element, reasons for the incentives, and a summary of
          all trade-off possibilities considered.

        (d) The Contractor shall obtain the Contracting Officer's written
     consent before placing any subcontract for which advance notification is
     required under paragraph (b) above. However, the Contracting Officer may
     ratify in writing any such subcontract. Ratification shall constitute the
     consent of the Contracting Officer.

        (e) Even if the Contractor's purchasing system has been approved, the 
     Contractor shall obtain the Contracting Officer's written consent before
     placing subcontracts identified below: _________

        (f) Unless the consent or approval specifically provides otherwise,
     neither consent by the Contracting Officer to any subcontract nor approval
     of the Contractor's purchasing system shall constitute a determination (1)
     of the acceptability of any subcontract terms or conditions (2) of the
     acceptability of any subcontract price or of any amount paid under any
     subcontract, or (3) to relieve the Contractor of any responsibility for
     performing this contract.

        (g) No subcontract placed under this contract shall provide for payment
     on a cost-plus-a-percentage-of-cost basis, and any fee payable under cost-
     reimbursement subcontracts shall not exceed the fee limitations in
     subsection 15.903(d) of the Federal Acquisition Regulation (FAR).

        (h) The Government reserves the right to review the Contractor's 
     purchasing system as set forth in FAR Subpart 44.3.

                                (End of clause)

74   52.246-12       INSPECTION OF CONSTRUCTION (AUG 1996)

        (a) Definition.  "Work" includes, but is not limited to, materials, 
     workmanship, and manufacture and fabrication of components.

        (b) The Contractor shall maintain an adequate inspection system and
     perform such inspections as will ensure that the work performed under the
     contract conforms to contract requirements. The Contractor shall maintain
     complete inspection records and make them available to the Government. All
     work shall be conducted under the general direction of the Contracting
     Officer and is subject to Government inspection and test at all places and
     at all reasonable times before acceptance to ensure strict compliance with
     the terms of the contract.

        (c) Government inspections and tests are for the sole benefit of the 
     Government and do not--

          (1) Relieve the Contractor of responsibility for providing adequate

                                   00700-105
<PAGE>
 
        quality control measures:

          (2) Relieve the Contractor of responsibility for damage to or loss of 
        the material before acceptance;

          (3) Constitute or imply acceptance; or

          (4) Affect the continuing rights of the Government after acceptance of
        the completed work under paragraph (i) below.

        (d) The presence or absence of a Government inspector does not relieve
     the Contractor from any contract requirement, nor is the inspector
     authorized to change any term or condition of the specification without the
     Contracting Officer's written authorization.

        (e) The Contractor shall promptly furnish, at no increase in contract
     price, all facilities, labor, and material reasonably needed for performing
     such safe and convenient inspections and tests as may be required by the
     Contracting Officer. The Government may charge to the Contractor any
     additional cost of inspection or test when work is not ready at the time
     specified by the Contractor for inspection or test, or when prior rejection
     makes reinspection or retest necessary. The Government shall perform all
     inspections and tests in a manner that will not unnecessarily delay the
     work. Special, full size, and performance tests shall be performed as
     described in the contract.

        (f) The Contractor shall, without charge, replace or correct work found
     by the Government not to conform to contract requirements, unless in the
     public interest the Government consents to accept the work with an
     appropriate adjustment in contract price. The Contractor shall promptly
     segregate and remove rejected material from the premises.

        (g) If the Contractor does not promptly replace or correct rejected
     work, the Government may (1) by contract or otherwise, replace or correct
     the work and charge the cost to the Contractor or (2) terminate for default
     the Contractor's right to proceed.

        (h) If, before acceptance of the entire work, the Government decides to 
     examine already completed work by removing it or tearing it out, the
     Contractor, on request, shall promptly furnish all necessary facilities,
     labor, and material. If the work is found to be defective or nonconforming
     in any material respect due to the fault of the Contractor or its
     subcontractors, the Contractor shall defray the expenses of the examination
     and of satisfactory reconstruction. However, if the work is found to meet
     contract requirements, the Contracting Officer shall make an equitable
     adjustment for the additional services involved in the examination and
     reconstruction, including, if completion of the work was thereby delayed,
     an extension of time.

        (i) Unless otherwise specified in the contract, the Government shall

                                   00700-106
<PAGE>
 
     accept, as promptly as practicable after completion and inspection, all
     work required by the contract or that portion of the work the Contracting
     Officer determines can be accepted separately. Acceptance shall be final
     and conclusive except for latent defects, fraud, gross mistakes amounting
     to fraud, or the Government's rights under any warranty or guarantee.

                                (End of clause)


75   52.246-21      WARRANTY OF CONSTRUCTION (MAR 1994)

          (a)  In addition to any other warranties in this contract, the 
     Contractor warrants, except as provided in paragraph (i) of this clause,
     that work performed under this contract conforms to the contract
     requirements and is free of any defect in equipment, material, or design
     furnished, or workmanship performed by the Contractor or any subcontractor
     or supplier at any tier.

          (b)  This warranty shall continue for a period of 1 year from the date
     of final acceptance of the work. If the Government takes possession of any
     part of the work before final acceptance, this warranty shall continue for
     a period of 1 year from the date the Government takes possession.

          (c)  The Contractor shall remedy at the Contractor's expense any 
     failure to conform, or any defect. In addition, the Contractor shall remedy
     at the Contractor's expense any damage to Government-owned or controlled
     real or personal property, when that damage is the result of--

               (1)  The Contractor's failure to conform to contract 
          requirements; or 

               (2)  Any defect of equipment, material, workmanship, or design 
          furnished.

          (d)  The Contractor shall restore any work damaged in fulfilling the 
     terms and conditions of this clause. The Contractor's warranty with respect
     to work repaired or replaced will run for 1 year from the date of repair or
     replacement.

          (e)  The Contracting Officer shall notify the Contractor, in writing, 
     within a reasonable time after the discovery of any failure, defect, or 
     damage.

          (f)  If the Contractor fails to remedy any failure, defect, or damage 
     within a reasonable time after receipt of notice, the Government shall have
     the right to replace, repair, or otherwise remedy the failure, defect, or
     damage at the Contractor's expense.

          (g)  With respect to all warranties, express or implied, from 
     subcontractors, manufactures, or suppliers for work performed and materials
     furnished under this contract, the Contractor shall--

                                   00700-107
<PAGE>
 
               (1)  Obtain all warranties that would be given in normal
          commercial practice;

               (2)  Require all warranties to be executed, in writing, for the
          benefit of the Government, if directed by the Contracting Officer; and

               (3)  Enforce all warranties for the benefit of the Government, if
          directed by the Contracting Officer.

          (h)  In the event the Contractor's warranty under paragraph (b) of
     this clause has expired, the Government may bring suit at its expense to
     enforce a subcontractor's, manufacturer's, or supplier's warranty.

          (i)  Unless a defect is caused by the negligence of the Contractor or
     subcontractor or supplier at any tier, the Contractor shall not be liable
     for the repair of any defects of material or design furnished by the
     Government nor for the repair of any damage that results from any defect in
     Government-furnished material or design.

          (j)  This warranty shall not limit the Government's rights under the 
     Inspection and Acceptance clause of this contract with respect to latent
     defects, gross mistakes, or fraud.

                                (End of clause)

                             (R 7-604.4 1976 JUL)


76   52.248-3 I      VALUE ENGINEERING--CONSTRUCTION (MAR 1989)--ALTERNATE I 
                     (APR 1984)

          (a)  General. The Contractor is encouraged to develop, prepare, and 
     submit value engineering change proposals (VECP's) voluntarily. The
     Contractor shall share in any instant contract savings realized from
     accepted VECP's, in accordance with paragraph (f) below.

          (b)  Definitions. "Collateral costs," as used in this clause, means 
     agency costs of operation, maintenance, logistic support, or 
     Government-furnished property.

          "Collateral savings," as used in this clause, means those measurable
     net reductions resulting from a VECP in the agency's overall projected
     collateral costs, exclusive of acquisition savings, whether or not the
     acquisition cost changes.

          "Contractor's development and implementation costs," as used in this 
     clause, means those costs the Contractor incurs on a VECP specifically in
     developing, testing, preparing, and submitting the VECP, as well as those
     costs the Contractor incurs to make the contractual changes required by
     Government acceptance of a VECP.

          "Government costs," as used in this clause, means those agency costs 
     that result directly from developing and implementing the VECP, such as

                                   00700-108
<PAGE>
 
any net increases in the cost of testing, operations, maintenance, and logistic 
support. The term does not include the normal administrative costs of processing
the VECP.

  "Instant contract savings," as used in this clause, means the estimated 
reduction in Contractor cost of performance resulting from acceptance of the 
VECP, minus allowable Contractor's development and implementation costs, 
including subcontractors' development and implementation costs (see paragraph 
(h) below).

  "Value engineering change proposal (VECP)" means a proposal that**

     (1)  Requires a change to this, the instant contract, to implement and

     (2)  Results in reducing the contract price or estimated cost without 
impairing essential functions or characteristics: provided, that it does not 
involve a change**

      (i)  In deliverable end item quantities only, or

      (ii) To the contract type only.

  (c) VECP preparation. As a minimum, the Contractor shall include in each 
VECP the information described in subparagraphs (1) through (7) below. If the 
proposed change is affected by contractually required configuration management 
or similar procedures, the instructions in those procedures relating to format, 
identification, and priority assignment shall govern VECP preparation. The VECP 
shall include the following:

    (1) A description of the difference between the existing contract
requirement and that proposed, the comparative advantages and disadvantages of
each, a justification when an item's function or characteristics are being
altered, and the effect of the change on the end item's performance.

    (2) A list and analysis of the contract requirements that must be changed if
the VECP is accepted, including any suggested specification revisions.

    (3) A separate, detailed cost estimate for (i) the affected portions of the
existing contract requirement and (ii) the VECP. The cost reduction associated
with the VECP shall take into account the Contractor's allowable development and
implementation costs, including any amount attributable to subcontractors under
paragraph (h) below.

    (4) A description and estimate of costs the Government may incur in
implementing the VECP, such as test and evaluation and operating and support
costs.

    (5) A prediction of any effects the proposed change would have on collateral
costs to the agency.

    (6) A statement of the time by which a contract modification accepting the
VECP must be issued in order to achieve the maximum cost reduction.

                                   00700-109
<PAGE>
 
        noting any effect on the contract completion time or delivery schedule.

          (7) Identification of any previous submissions of the VECP, including 
        the dates submitted, the agencies and contract numbers involved, and
        previous Government actions, if known.

        (d) Submission.  The Contractor shall submit VECP's to the Resident
     Engineer at the worksite, with a copy to the Contracting Officer.

        (e) Government action.  (1) The Contracting Officer shall notify the 
     Contractor of the status of the VECP within 45 calendar days after the
     contracting office receives it. If additional time is required, the
     Contracting Officer shall notify the Contractor within the 45-day period
     and provide the reason for the delay and the expected date of the decision.
     The Government will process VECP's expeditiously; however, it shall not be
     liable for any delay in acting upon a VECP.

          (2) If the VECP is not accepted, the Contracting Officer shall notify 
        the Contractor in writing, explaining the reasons for rejection. The
        Contractor may withdraw any VECP, in whole or in part, at any time
        before it is accepted by the Government. The Contracting Officer may
        require that the Contractor provide written notification before
        undertaking significant expenditures for VECP effort.

          (3) Any VECP may be accepted, in whole or in part, by the Contracting
        Officer's award of a modification to this contract citing this clause.
        The Contracting Officer may accept the VECP, even though an agreement on
        price reduction has not been reached, by issuing the Contractor a notice
        to proceed with the change. Until a notice to proceed is issued or a
        contract modification applies a VECP to this contract, the Contractor
        shall perform in accordance with the existing contract. The Contracting
        Officer's decision to accept or reject all or part of any VECP shall be
        final and not subject to the Disputes clause or otherwise subject to
        litigation under the Contract Disputes Act of 1978 (41 U.S.C. 601-613).

        (f) Sharing.  (1) Rates. The Government's share of savings is determined
     by subtracting Government costs from instant contract savings and
     multiplying the result by (i) 45 percent for fixed-price contracts or (ii)
     75 percent for cost-reimbursement contracts.

          (2) Payment.  Payment of any share due the Contractor for use of a
        VECP on this contract shall be authorized by a modification to this
        contract to--

            (i)   Accept the VECP;

            (ii)  Reduce the contract price or estimated cost by the amount of 
          instant contract savings; and

            (iii) Provide the Contractor's share of savings by adding the amount
          calculated to the contract price or fee.

                                   00700-110
<PAGE>
 
        (g) Subcontracts.  The Contractor shall include an appropriate value
     engineering clause in any subcontract of $50,000 or more and may include
     one in subcontracts of lesser value. In computing any adjustment in this
     contract's price under paragraph (f) above, the Contractor's allowable
     development and implementation costs shall include any subcontractor's
     allowable development and implementation costs clearly resulting from a
     VECP accepted by the Government under this contract, but shall exclude any
     value engineering incentive payments to a Subcontractor. The Contractor may
     choose any arrangement for subcontractor value engineering incentive
     payments; provided, that these payments shall not reduce the Government's
     share of the savings resulting from the VECP.

        (h) Data.  The Contractor may restrict the Government's right to use any
     part of a VECP or the supporting data by marking the following legend on
     the affected parts:

     "These data, furnished under the Value Engineering--Construction clause of
     contract ________________, shall not be disclosed outside the Government or
     duplicated, used, or disclosed, in whole or in part, for any purpose other
     than to evaluate a value engineering change proposal submitted under the
     clause. This restriction does not limit the Government's right to use
     information contained in these data if it has been obtained or is otherwise
     available from the Contractor or from another source without limitations."

        If a VECP is accepted, the Contractor hereby grants the Government
     unlimited rights in the VECP and supporting data, except that, with respect
     to data qualifying and submitted as limited rights technical data, the
     Government shall have the rights specified in the contract modification
     implementing the VECP and shall appropriately mark the data. (The terms
     "unlimited rights" and "limited rights" are defined in Part 27 of the
     Federal Acquisition Regulation.)

                                (End of clause)

77   52.249-2 I     TERMINATION FOR CONVENIENCE OF THE GOVERNMENT (FIXED-PRICE)
                    (SEP 1996)-- ALTERNATE I (SEP 1996)

        (a) The Government may terminate performance of work under this contract
     in whole or, from time to time in part if the Contracting Officer
     determines that a termination is in the Government's interest. The
     Contracting Officer shall terminate by delivering to the Contractor a
     Notice of Termination specifying the extent of termination and the
     effective date.

                                   00700-111
<PAGE>
 
   (b) After receipt of a Notice of Termination, and except as directed by the
Contracting Officer, the Contractor shall immediately proceed with the following
obligations, regardless of any delay in determining or adjusting any amounts due
under this clause:

     (1) Stop work as specified in the notice.

     (2) Place no further subcontracts or orders (referred to as subcontracts in
   this clause) for materials, services, or facilities, except as necessary to 
   complete the continued portion of the contract.

     (3) Terminate all subcontracts to the extent they relate to the work 
   terminated.

     (4) Assign to the Government, as directed by the Contracting Officer, all 
   right, title, and interest of the Contractor under the subcontracts
   terminated, in which case the Government shall have the right to settle or
   pay any termination settlement proposal arising out of those terminations.

     (5) With approval or ratification to the extent required by the Contracting
   Officer, settle all outstanding liabilities and termination settlement
   proposals arising from the termination of subcontracts, the approval or
   ratification will be final for purposes of this clause.

     (6) As directed by the Contracting Officer, transfer title and deliver to 
   the Government (i) the fabricated or unfabricated parts, work in process,
   completed work, supplies, and other material produced or acquired for the
   work terminated, and (ii) the completed or partially completed plans,
   drawings, information, and other property that, if the contract had been
   completed, would be required to be furnished to the Government.

     (7)  Complete performance of the work not terminated.

     (8) Take any action that may be necessary, or that the Contracting Officer
   may direct, for the protection and preservation of the property related to
   this contract that is in the possession of the Contractor and in which the
   Government has or may acquire an interest.

     (9) Use its best efforts to sell, as directed or authorized by the 
   Contracting Officer, any property of the types referred to in subparagraph
   (b) (c) of this clause; provided, however, that the Contractor (i) is not
   required to extend credit to any purchaser and (ii) may acquire the property
   under the conditions prescribed by, and at prices approved by, the
   Contracting Officer. The proceeds of any transfer or disposition will be
   applied to reduce any payments to be made by the Government under this
   contract, credited to the price or cost of the work, or paid in any other
   manner directed by the Contracting Officer.
                                   
                                   00700-112
<PAGE>
 
          (c)  The Contractor shall submit complete termination inventory
     schedules no later than 120 days from the effective date of termination,
     unless extended in writing by the Contracting Officer upon written request
     of the Contractor within this 120-day period.

          (d)  After expiration of the plant clearance period as defined in
     Subpart 45.6 of the Federal Acquisition Regulation, the Contractor may
     submit to the Contracting Officer a list, certified as to quantity and
     quality, of termination inventory not previously disposed of, excluding
     items authorized for disposition by the Contracting Officer. The Contractor
     may request the Government to remove those items or enter into an agreement
     for their storage. Within 15 days, the Government will accept title to
     those items and remove them or enter into a storage agreement. The
     Contracting Officer may verify the list upon removal of the items, or if
     stored, within 45 days from submission of the list, and shall correct the
     list, as necessary, before final settlement.

          (e) After termination, the Contractor shall submit a final termination
     settlement proposal to the Contracting Officer in the form and with the
     certification prescribed by the Contracting Officer. The Contractor shall
     submit the proposal promptly, but no later than 1 year from the effective
     date of termination, unless extended in writing by the Contracting Officer
     upon written request of the Contractor within this 1 year period. However,
     if the Contracting Officer determines that the facts justify it, a
     termination settlement proposal may be received and acted on after 1 year
     or any extension. If the Contractor fails to submit the proposal within the
     time allowed, the Contracting Officer may determine, on the basis of
     information available, the amount, if any, due the Contractor because of
     the termination and shall pay the amount determined.

          (f) Subject to paragraph (e) of this clause, the Contractor and the
     Contracting Officer may agree upon the whole or any part of the amount to
     be paid or remaining to be paid because of the termination. The amount may
     include a reasonable allowance for profit on work done. However, the agreed
     amount, whether under this paragraph (f) or paragraph (g) of this clause,
     exclusive of costs shown in subparagraph (g) (3) of this clause, may not
     exceed the total contract price as reduced by (1) the amount of payments
     previously made and (2) the contract price of work not terminated. The
     contract shall be modified, and the Contractor paid the agreed amount.
     Paragraph (g) of this clause shall not limit, restrict, or affect the
     amount that may be agreed upon to be paid under this paragraph.

          (g) If the Contractor and Contracting Officer fail to agree on the
     whole amount to be paid the Contractor because of the termination of work,
     the Contracting Officer shall pay the Contractor the amounts determined as

                                   00700-113
<PAGE>
 
     follow, but without duplication of any amounts agreed upon under paragraph
     (f) of this clause:

          (1) For contract work performed before the effective date of
          termination, the total (without duplication of any items) of--

              (i)   The cost of this work;   
                                             
              (ii)  The cost of settling and paying termination settlement
          proposals under terminated subcontracts that are properly chargeable
          to the terminated portion of the contract if not included in
          subdivision (g) (1) (1) of this clause; and

              (iii) A sum, as profit on subdivision (g) (1) (1) of this clause,
          determined by the Contracting Officer under 49.202 of the Federal
          Acquisition Regulation, in effect on the date of this contract, to be
          fair and reasonable; however, if it appears that the Contractor would
          have sustained a loss on the entire contract had it been completed,
          the Contracting Officer shall allow no profit under this subdivision
          (iii) and shall reduce the settlement to reflect the indicated rate of
          loss.

          (2) The reasonable costs of settlement of the work terminated, 
              including--
              
              (i)   Accounting, legal, clerical, and other expenses reasonably
          necessary for the preparation of termination settlement proposals and
          supporting data;

              (ii)  The termination and settlement of subcontracts (excluding
          the amounts of such settlements), and
          
              (iii) Storage, transportation, and other costs incurred,
          reasonably necessary for the preservation, protection, or disposition
          of the termination inventory.

          (h) Except for normal spoilage, and except to the extent that the
     Government expressly assumed the risk of loss, the Contracting Officer
     shall exclude from the amounts payable to the Contractor under paragraph
     (g) of this clause, the fair value, as determined by the Contracting
     Officer, of property that is destroyed, lost, stolen, or damaged so as to
     become undeliverable to the Government or to a buyer.

          (i) The cost principles and procedures of Part 31 of the Federal
     Acquisition Regulation, in effect on the date of this contract, shall
     govern all costs claimed, agreed to, or determined under this clause.

          (j) The Contractor shall have the right of appeal, under the Disputes
     clause, from any determination made by the Contracting Officer under
     paragraph (e), (g), or (1) of this clause, except that if the Contractor
     failed to submit the termination settlement proposal or request for
     equitable adjustment within the time provided in paragraph (e) or (l),
     respectively, and failed to request a time extension, there is no right of

                                   00700-114
<PAGE>
 
appeal.

  (k)  In arriving at the amount due the Contractor under this clause, there
shall be deducted--

     (1)  All unliquidated advance or other payments to the Contractor under the
  terminated portion of this contract;

     (2)  Any claim which the Government has against the Contractor under this 
  contract; and

     (3)  The agreed price for, or the proceeds of sale of, materials, supplies,
  or other things acquired by the Contractor or sold under the provisions of
  this clause and not recovered by or credited to the Government.

  (l)  If the termination is partial, the Contractor may file a proposal with 
the Contracting Officer for an equitable adjustment of the price(s) of the 
continued portion of the contract. The Contracting Officer shall make any 
equitable adjustment agreed upon. Any proposal by the Contractor for an
equitable adjustment under this clause shall be requested within 90 days from
the effective date of termination unless extended in writing by the Contracting
Officer.

   (m) (1) The Government may, under the terms and conditions it prescribes, 
make partial payments and payments against costs incurred by the Contractor for
the terminated portion of the contract, if the Contracting Officer believes the
total of these payments will not exceed the amount to which the Contractor will
be entitled.

       (2)  If the total payments exceed the amount finally determined to be
  due, the Contractor shall repay the excess to the Government upon demand,
  together with interest computed at the rate established by the Secretary of
  the Treasury under 50 U.S.C. App. 1215(b)(2). Interest shall be computed for
  the period from the date the excess payment is received by the Contractor to
  the date the excess is repaid. Interest shall not be charged on any excess
  payment due to a reduction in the Contractor's termination settlement proposal
  because of retention or other disposition, or a later date determined by the
  Contracting Officer because of the circumstances.

  (n)  Unless otherwise provided in this contract or by statute, the Contractor 
shall maintain all records and documents relating to the terminated portion of 
this contract for 3 years after final settlement. This includes all books and 
other evidence bearing on the Contractor's costs and expenses under this 
contract. The Contractor shall make these records and documents available to the
Government, at the Contractor's office, at all reasonable times, without any 
direct charge. If approved

                                   00700-115
<PAGE>
 
     by the Contracting Officer, photographs, microphotographs, or other 
     authentic reproductions may be maintained instead of original records and 
     documents.
 
                                (End of clause)

78   52.249-10     DEFAULT (FIXED-PRICE CONSTRUCTION) (APR 1984)

          (a)  If the Contractor refuses or fails to prosecute the work or any 
     separable part, with the diligence that will insure its completion within 
     the time specified in this contract including any extension, or fails to 
     complete the work within this time, the Government may, be written notice 
     to the Contractor, terminate the right to proceed with the work (or the 
     separable part of the work) that has been delayed. In this event, the 
     Government may take over the work and complete it by contract or otherwise,
     and may take possession of and use any materials, appliances, and plant on 
     the work site necessary for completing the work. The Contractor and its 
     sureties shall be liable for any damage to the Government resulting from 
     the Contractor's refusal or failure to complete the work within the
     specified time, whether or not the Contractor's right to proceed with the
     work is terminated. This liability includes any increased costs incurred by
     the Government in completing the work.

          (b)  The Contractor's right to proceed shall not be terminated nor the
     Contractor charged with damages under this clause, if-

               (1)  The delay in completing the work arises from unforeseeable 
          causes beyond the control and without the fault or negligence of the 
          Contractor. Examples of such causes include (i) acts of God or of the 
          public enemy, (ii) acts of the Government in either its sovereign or 
          contractual capacity, (iii) acts of another Contractor in the 
          performance of a contract with the Government, (iv) fires, (v) 
          floods, (vi) epidemics, (vii) quarantine restrictions, (viii) strikes,
          (ix) freight embargoes, (x) unusually severe weather, or (xi) delays 
          of subcontractors or suppliers at any tier arising from unforeseeable 
          causes beyond the control and without the fault or negligence of both
          the Contractor and the subcontractors or suppliers; and

               (2)  The Contractor, within 10 days from the beginning of any 
          delay (unless extended by the Contracting Officer), notifies the 
          Contracting Officer in writing of the causes of delay. The Contracting
          Officer shall ascertain the facts and the extent of delay. If, in the 
          judgment of the Contracting Officer, the findings of fact warrant such
          action, the time for completing the work shall be extended. The 
          findings of the

                                   00700-116










<PAGE>
 
          Contracting Officer shall be final and conclusive on the parties, but 
          subject to appeal under the disputes clause.

          (c)  If, after termination of the Contractor's right to proceed, it is
     determined that the Contractor was not in default, or that the delay was 
     excusable, the rights and obligations of the parties will be the same as if
     the termination had been issued for the convenience of the Government. 

          (d)  The rights and remedies of the Government in this clause are in 
     addition to any other rights and remedies provided by law or under this 
     contract.

                                (End of clause)

79   52.252-8    AUTHORIZED DEVIATIONS IN CLAUSES (APR 1994)

          (a)  The use in this solicitation or contract of any Federal 
     Acquisition Regulation (48 CFR Chapter 1) clause with an authorized 
     deviation is indicated by the addition of "(DEVIATION)" after the date of 
     the clause.

          (b)  The use in this solicitation or contract of any ___________ (48 
     CFR _________) clause with an authorized deviation is indicated by the 
     addition of "(DEVIATION)" after the name of the regulation.

                                (End of clause)

                                     (NM)

80   52.253-1    COMPUTER GENERATED FORMS (JAN 1991)

          (a)  Any data required to be submitted on a Standard or Optional Form 
     prescribed by the Federal Acquisition Regulation (FAR) may be submitted on
     a computer generated version of the form provided there is no change to the
     name, content, or sequence of the data elements on the form, and provided
     the form carries the Standard of Optional Form number and edition date.

          (b)  Unless prohibited by agency regulations, any date required to be
     submitted on an agency unique form prescribed by an agency supplement to
     the FAR may be submitted on a computer generated version of the form
     provided there is no change to the name, content, or sequence of the data
     elements on the form and provided the form carries the agency form number
     and edition date.

          (c)  If the Contractor submits a computer generated version of a form 
     that is different than the required form, then the rights and obligations 
     of the parties will be determined based on the content of the required

                                   00700-117
<PAGE>
 
     form.

                                (End of clause)

81   252.201-7000    CONTRACTING OFFICER'S REPRESENTATIVE (DEC 1991)

          (a)  Definition. "Contracting Officer's representative" means an 
     individual designated in accordance with subsection 201.602-2 of the 
     Defense Federal Acquisition Regulation Supplement and authorized in writing
     by the Contracting Officer to perform specific technical or administrative 
     functions.

          (b)  If the Contracting Officer designated a contracting officer's 
     representative (COR), the Contractor will receive a copy of the written 
     designation. It will specify the extent of the COR's authority to act on 
     behalf of the Contracting Officer. The COR is not authorized to make any 
     commitments or changes that will affect price, quality, quantity, 
     delivery, or any other term or condition of the contract.
     
                                (End of clause)

82   252.203-7001    SPECIAL PROHIBITION ON EMPLOYMENT (NOV 1995)

          (a)  Definitions.

          As used in this clause--

               (1)  "Arising out of a contract with the DoD" means any act in 
          connection with--

                    (i)   Attempting to obtain,

                    (ii)  Obtaining, or

                    (iii) Performing a contract or first-tier subcontract of any
               agency, department, or component of the Department of Defense 
               (DoD).

               (2)  "Conviction of fraud or any other felony" means any 
          conviction for fraud or a felony in violation of state or Federal 
          criminal statutes, whether entered on a verdict or plea, including a 
          plea of nolo contendare, for which sentence has been imposed.

               (3)  "Date of conviction" means the date the judgment was entered
          against the individual.

          (b)  10 U.S.C. 2408 provides that any individual who is convicted 
     after September 29, 1988, of fraud or any other felony arising out of a 
     contract with the DoD is prohibited from:

               (1)  Working in a management or supervisory capacity on any DoD 
          contract or first-tier subcontract;

                                   00700-118
<PAGE>
 
               (2)  Serving on the board of directors of any DoD Contractor or 
          first-tier subcontractor; or

               (3)  Serving as a consultant to any DoD Contractor or first-tier 
          subcontractor.

          (c)  Unless waived, the prohibition in paragraph (b) applies for five 
     years from the date of conviction.

          (d)  10 U.S.C. 2408 further provides that a defense Contractor or 
     first-tier subcontractor shall be subject to a criminal penalty of not 
     more than $500,000 if convicted of knowingly--

               (1)  Employing a person under a prohibition specified in 
          paragraph (b) of this clause; or

               (2)  Allowing such person to serve on the board of directors of 
          the Contractor or first-tier subcontractor.

          (e)  In addition to the criminal penalties contained in 10 U.S.C. 
     2408, the Government may consider other available remedies, such as--

               (1)  Suspension or debarment;

               (2)  Cancellation of the contract at no cost to the Government; 
          or

               (3)  Termination of the contract for default.

          (f)  The Contractor may submit written requests for waiver of the 
     prohibitions in paragraph (b) of this clause to the Contracting Officer.
     Requests shall clearly identify--

               (1)  The person involved;

               (2)  The nature of the conviction and resultant sentence or 
          punishment imposed;
     
               (3)  The reasons for the requested waiver; and,

               (4)  An explanation of why a waiver is in the interest of 
          national security.

          (g)  The Contractor agrees to include the substance of this clause, 
     appropriately modified to reflect the identity and relationship of the
     parties, in all first-tier subcontracts exceeding the simplified
     acquisition threshold in Part 13 of the Federal Acquisition Regulation,
     except those for commercial items or components.

          (h)  Pursuant to 10 U.S.C. 2408(c), defence contractors and 
     subcontractors may obtain information as to whether a particular person has
     been convicted of fraud or any other felony arising out of a contract with
     the DoD by contacting The Office of Justice Programs, The Denial of
     Benefits Office, U.S. Department of Justice, telephone (202) 307-1065.

                                (End of clause)

83   252.203-7002    DISPLAY OF DOD HOTLINE POSTER (DEC 1991)

                                   00700-119
<PAGE>
 
          (a)  The Contractor shall display prominently in common work areas 
     within business segments performing work under Department of Defence (DoD) 
     contracts, DoD Hotline Posters prepared by the DoD Office of the Inspector 
     General.
     
          (b)  DoD Hotline Posters may be obtained from the DoD Inspector 
     General, ATTN: Defense Hotline, 400 Army Navy Drive, Washington, DC 
     22202-2684. 

          (c)  The Contractor need not comply with paragraph (a) of this clause 
     if it has established a mechanism, such as a hotline, by which employees 
     may report suspected instances of improper conduct, and instructions that 
     encourage employees to make such reports.

                                [End of clause)

84   252.204-7000    DISCLOSURE OF INFORMATION (DEC 1991)

          (a)  The Contractor shall not release to anyone outside the 
     Contractor's organization any unclassified information, regardless of
     medium (e.g., film, tape, document), pertaining to any part of this
     contract or any program related to this contract, unless--

               (1)  The Contracting Officer has given prior written approval; or

               (2)  The information is otherwise in the public domain before the
          date of release.

          (b)  Requests for approval shall identify the specific information to 
     be released, the medium to be used, and the purpose for the release. The
     Contractor shall submit its request to the Contracting Officer at least 45
     days before the proposed date for release.

          (e)  The Contractor agrees to include a similar requirement in each 
     subcontract under this contract. Subcontractors shall submit requests for 
     authorization to release through the prime Contractor to the Contracting 
     Officer.

                                (End of clause)

85   252.204-7003   CONTROL OF GOVERNMENT PERSONNEL WORK PRODUCT (APR 1992)

          The Contractor's procedures for protecting against unauthorized 
     disclosure of information shall nor require Department of Defence employees
     or members of the Armed Forces to relinquish control of their work
     products, whether classified or not, to the Contractor.

                                (End of clause)

                                   00700-120
<PAGE>
 
86   252.205-7000    PROVISION OF INFORMATION TO COOPERATIVE AGREEMENT HOLDERS 
                     (DEC 1991)

          (a)  Definition.

          "Cooperative agreement holder" means a State or local government; a 
     private, nonprofit organization; a tribal organization (as defined in 
     section 4(c) of the Indian Self-Determination and Education Assistance Act 
     (Pub. L. 93-268; 25 U.S.C. 450(c))); or an economic enterprise (as defined 
     in section 3(a) of the Indian Financing Act of 1974 (Pub. L. 93-362; 25 
     U.S.C. 1452(e))) whether such economic enterprise is organized for profit 
     or nonprofit purposes; which has an agreement with the Defence Logistics 
     Agency to furnish procurement technical assistance to business entities.

          (b)  The Contractor shall provide cooperative agreement holders, upon 
     their request, with a list of those appropriate employees or offices 
     responsible for entering into subcontracts under defence contracts. The 
     list shall include the business address, telephone number, and area of 
     responsibility of each employee or office.

          (c)  The Contractor need not provide the listing to a particular 
     cooperative agreement holder more frequently than once a year.

                                (End of clause)

87   252.209-7000    ACQUISITION FROM SUBCONTRACTORS SUBJECT TO ON-SITE 
                     INSPECTION UNDER THE INTERMEDIATE-RANGE NUCLEAR FORCES 
                     (INF) TREATY (NOV 1995)

          (a)  The Contractor shall not deny consideration for a subcontract 
     award under this contract to a potential subcontractor subject to on-site
     inspection under the INF Treaty, or a similar treaty, solely or in part
     because of the actual or potential presence of Soviet inspectors at the
     subcontractor's facility, unless the decision is approved by the
     Contracting Officer.
     
          (b)  The Contractor shall incorporate this clause, including this 
     paragraph (b), in all solicitations and contracts exceeding the simplified 
     acquisition threshold in Part 13 of the Federal Acquisition Regulation, 
     except those for commercial items.

                                (End of clause)

88   252.209-7004    REPORTING OF COMMERCIAL TRANSACTIONS WITH THE GOVERNMENT OF
                     A TERRORIST

                                 00700-121   
<PAGE>

                         COUNTRY (SEP 1994)
 
          (a)  Definitions.

               As used in this clause--

               (1)  "Government of a terrorist country" includes the state and
          the government of a terrorist country, as well as any political
          subdivision, agency, or instrumentality thereof.
 
               (2)  "Terrorist country" means a country determined by the
          Secretary of State, under section 6(j) (1) (A) of the Export
          Administration Act of 1979 (50 U.S.C. App. 2405 (j) (i) (A)), as of 60
          days before the contract award date, to be a country the government of
          which has repeatedly provided support for acts of international
          terrorism. As of the date of this clause, terrorist countries include:
          Cuba, Iran, Iraq, Libya, North Korea, Sudan, and Syria.

          (b)  Reporting.

               (1)  In accordance with section 843 of the National Defense
          Authorization Act for Fiscal Year 1994 (Pub. L. 103-160), if this
          contract exceeds $5,000,000, the Contractor shall report each
          commercial transaction that it conducts with the government of a
          terrorist country during the period of performance of this contract
          (but not beyond September 30, 1996).

               (2)  This reporting requirement does not apply to--

                    (i)  Transactions conducted by affiliates of subsidiaries of
               the Contractor; a 

                    (ii) Payment or receipt of payment of a judgment or award
               ordered by a court or arbitral tribunal of competent
               jurisdiction.
               
               (3)  The Contractor shall submit reports in the following format:

          Title of Report:    Report of Commercial Transactions with the 
                              Government of a Terrorist Country

          Date of Report:
          Contract Number:
          Contractor's Name and Address:
          Name and Telephone Number of Individual Submitting Report:
          Commercial Transactions with the Government of a Terrorist Country:

          Country                    Nature of Commercial Transaction

          ________________           ___________________________________________

          ________________           ___________________________________________

                                   00700-122
<PAGE>
 
               (4)  The Contractor shall submit reports annually by September
          30, but not beyond September 30, 1996. Each report shall include
          transactions conducted during the preceding one-year period of
          contract performance.

               (5)  The Contractor shall submit reports to:

          Deputy Director of Defense Procurement (Foreign Contracting),
          OUSD (A&T) DF (FC), Washington, DC 20301-3060.

                                (End of clause)


89   252.219-7003     SMALL, SMALL DISADVANTAGED AND WOMEN-OWNED SMALL BUSINESS 
                      SUBCONTRACTING PLAN (DoD CONTRACTS) (APR 1996)


          This clause supplements the Federal Acquisition Regulation 52.219-9,
     Small, Small Disadvantaged and Women-Owned Small Business Subcontracting
     Plan, clause of this contract.

          (a)  Definitions.

          "Historically black colleges and universities," as used in this
     clause, means institutions determined by the Secretary of Education to meet
     the requirements of 34 CFR 608.2. The term also means any nonprofit
     research institution that was an integral part of such a college or
     university before November 14, 1986.

          "Minority institutions," as used in this clause, means institutions
     meeting the requirements of section 1046(3) of the Higher Education Act of
     1965 (20 U.S.C. 113Sd-5(3)). The term also includes Hispanic-serving
     institutions as defined in section 316(b)(1) of such Act (20 U.S.C.
     1059c(b)(1)).

          (b)  Except for company or division-wide commercial items
     subcontracting plans, the term "small disadvantaged business," when used in
     the FAR 52.219-9 clause, includes historically black colleges and
     universities and minority institutions, in addition to small disadvantaged
     business concerns.

          (c)  Work under the contract or its subcontracts shall be credited
     toward meeting the small disadvantaged business concern goal required by
     paragraph (d) of the FAR 52.219-9 clause when:

               (1)  It is performed on Indian lands or in joint venture with an 
          Indian tribe or a tribally-owned corporation, and

               (2)  It meets the requirements of 10 U.S.C. 2323a.

          (d)  Subcontracts awarded to workshops approved by the Committee for
     Purchase from People Who are Blind or Severely Disabled (41 U.S.C. 46-48),
     may be counted toward the Contractor's small business subcontracting goal,

          (e)  A mentor firm, under the Pilot Mentor-Protege Program established

<PAGE>
 
     under Section 831 of Pub. L. 101-510, as amended, may count toward its 
     small disadvantaged business goal, subcontracts awarded --

               (1)  Protege firms which are qualified organizations employing
          the severely handicapped; and

               (2)  Former protege firms that meet the criteria in Section 
          831(g)(4) of Pub. L. 101-510.

          (f)  The master plan approval referred to in paragraph (f) of the FAR 
     52.219-9 clause is approval by the Contractor's cognisant contract
     administration activity.

          (g)  In those subcontracting plans which specifically identify small,
     small disadvantaged, and women-owned small businesses, the Contractor
     shall notify the Administrative Contracting Officer of any substitutions of
     firms that are not small, small disadvantaged, or women-owned small
     businesses for the firms listed in the subcontracting plan. Notifications
     shall be in writing and shall occur within a reasonable period of time
     after award of the subcontract. Contractor-specified formats shall be
     acceptable.

                                (End of clause)


90   252.223-7004        DRUG-FREE WORK FORCE (SEP 1988)

          (a)  Definitions.

               (1)  "Employee in a sensitive position," as used in this clause,
          means an employee who has been granted access to classified
          information; or employees in other positions that the Contractor
          determines involve national security, health or safety, or functions
          other than the foregoing requiring a high degree of trust and
          confidence.

               (2)  "Illegal drugs," as used in this clause, means controlled
          substances included in Schedules I and II, as defined by section
          802(G) of Title 21 of the United States Code, the possession of which
          is unlawful under Chapter 13 of that Title. The term "illegal drugs"
          does not mean the use of a controlled substance pursuant to a valid
          prescription or other uses authorized by law.

          (b)  The Contractor agrees to institute and maintain a program for
     achieving the objective of a drug-free work force. While this clause
     defines criteria for such a program, contractors are encouraged to
     implement alternative approaches comparable to the criteria in paragraph
     (c) that are designed to achieve the objectives of this clause.

          (c)  Contractor programs shall include the following, or appropriate 
     alternatives;

               (1)  Employee assistance programs emphasizing high level 
          direction,

                                   00700-124
<PAGE>
 
               education, counseling, rehabilitation, and coordination with
               available community resources;

                    (2)  Supervisory training to assist in identifying and
               addressing illegal drug use by Contractor employees;

                    (3)  Provision for self-referrals as well as supervisory
               referrals to treatment with maximum respect for individual
               confidentiality consistent with safety and security issues;

                    (4)  Provision for identifying illegal drug users, including
               testing on a controlled and carefully monitored basis. Employee
               drug testing programs shall be established taking account of the
               following:

                         (i)   The Contractor shall establish a program that
                    provides for testing for the use of illegal drugs by
                    employees in sensitive positions. The extent of and criteria
                    for such testing shall be determined by the Contractor based
                    on considerations that include the nature of the work being
                    performed under the contract, the employee's duties, the
                    efficient use of Contractor resources, and the risks to
                    health, safety, or national security that could result from
                    the failure of an employee adequately to discharge his or
                    her position.

                         (ii)  In addition, the Contractor may establish a
                    program for employee drug testing--

                              (A)  When there is a reasonable suspicion that an
                         employee uses illegal drugs; or

                              (B)  When an employee has been involved in an
                         accident or unsafe practice:

                              (C)  As part of or as a follow-up to counseling or
                         rehabilitation for illegal drug use;

                              (D)  As part of a voluntary drug testing program.

                         (iii) The Contractor may establish a program to test
                    applicants for employment for illegal drug use.

                         (iv)  For the purpose of administering this clause,
                    testing for illegal drugs may be limited to those substances
                    for which testing is prescribed by section 2.1 of Subpart B
                    of the "Mandatory Guidelines for Federal Workplace Drug
                    Testing Programs" (53 FR 11980 (April 11 1988)), issued by
                    the Department of Health and Human Services.

               (d)  Contractors shall adopt appropriate personnel procedures to
          deal with employees who are found to be using drugs illegally.
          Contractors shall not allow any employee to remain on duty or perform
          in a sensitive position who is found to use illegal drugs until such
          time as the Contractor, in accordance with procedures established by
          the Contractor, determines that the employee may perform in such a
          position.

               (e)  The provisions of this clause pertaining to drug testing 
          programs 

                                   00700-125
<PAGE>
 
     shall not apply to the extent they are inconsistent with state or local
     law, or with an existing collective bargaining Agreement, provided that
     with respect to the latter, the Contractor agrees that those issues that
     are in conflict will be a subject of negotiation at the next collective
     bargaining session.

                                [End of clause]


91   252.225-7007    TRADE AGREEMENTS (JUL 1996)

     
          (a)  Definitions.

               (1)  "Caribbean Basin country end product"--

                    (i)  Means an article that--

                         (A)  Is wholly the growth, product, or manufacture of a
                    Caribbean Basin country (as defined in section 25.401 of the
                    FAR); or

                         (B)  Has, in the case of an article which consists in
                    whole or in part of materials from another country or
                    instrumentality, been substantially transformed into a new
                    and different article of commerce with a name, character, or
                    use distinct from that of the article or articles from which
                    it was so transformed. The term includes services (except
                    transportation services) incidental to its supply, provided
                    that the value of those incidental services does not exceed
                    the value of the product itself. It does not include service
                    contracts as such.

                    (ii) Excludes products, other than petroleum and any product
               derived from petroleum, that are not granted duty-free treatment
               under the Caribbean Basin Economic Recovery Act (19 U.S.C. 2703
               (b)). These exclusions presently consist of--

                         (A)  Textiles and apparel articles that are subject to 
                    textile agreements;

                         (B)  Footwear, handbags, luggage, flat goods, work
                    gloves, and leather wearing apparel not designated as
                    eligible articles for the purpose of the Generalized System
                    of Preferences under Title V of the Trade Act of 1974;

                         (C)  Tuna, prepared or preserved in any manner in 
                    airtight containers; and

                         (D)  Watches and watch parts (including cases,
                    bracelets, and straps) of whatever type, including, but not
                    limited to, mechanical, quartz digital, or quartz analog, if
                    such watches or watch parts contain any material which is
                    the product of any country to which Harmonized Tariff
                    Schedule column 2 rates of duty apply.

                                   00700-126
<PAGE>
 
               (2)  "Components," "domestic end product," "end product,"
          "nonqualifying country," "qualifying country," and "qualifying
          country end product" have the meanings given in the Buy American Act
          and Balance of Payments Program clause of this contract.

               (3)  "Designated country" means:

               Aruba                         Japan
               Austria                       Lesotho
               Bangladesh                    Liechtenstein
               Belgium                       Luxembourg
               Benin                         Malawi
               Bhutan                        Maldives
               Botswana                      Mali
               Burkino Faso                  Nepal
               Burundi                       Netherlands
               Canada                        Niger
               Cape Verde                    Norway
               Central African Republic      Portugal
               Chad                          Republic of Korea
               Comoros                       Rwanda
               Denmark                       Singapore
               Finland                       Somalia
               France                        Spain
               Gambia                        Sudan
               Germany                       Sweden
               Greece                        Switzerland     
               Guinea                        Tanzania U.R.
               Haiti                         Uganda
               Ireland                       United Kingdom
               Israel                        Western Samoa
               Italy                         Yemen

               (4)  "Designated country end product" means an article that--

                    (i)  Is wholly the growth, product, or manufacture of the
               designated country; or

                    (ii) Has, in the case of an article which consists in whole
               or in part of materials from another country or instrumentality,
               been substantially transformed into a new and different article
               of commerce with a name, character, or use distinct from that of
               the article or articles from which it was so transformed. The
               term includes services (except transportation services)
               incidental to its supply, provided that the value of those
               incidental services does not exceed the value

                                   00700-127
<PAGE>
 
                    of the product itself. It does not include service contracts
                    as such. 

                    (5)  "NAFTA country end product" means an article that--

                         (i)  Is wholly the growth, product, or manufacture of
                    the NAFTA country; or

                         (ii) Has, in the case of an article which consists in
                    whole or in part of materials from another country or
                    instrumentality, been substantially transformed in a NAFTA
                    country into a new and different article of commerce with a
                    name, character, or use distinct from that of the article or
                    articles from which it was so transformed. The term includes
                    services (except transportation services) incidental to its
                    supply, provided that the value of those incidental services
                    does not exceed the value of the product itself. It does not
                    include service contracts as such.

                    (6)  "North American Free Trade Agreement (NAFTA) country" 
               means Canada or Mexico.

                    (7)  "Nondesignated country end product" means any end
               product which is not a U.S. made end product or a designated
               country end product.

                    (8)  "United States" means the United States, its
               possessions, Puerto Rico and any other place subject to its
               jurisdiction, but does not include leased bases or trust
               territories.

                    (9)  "U.S. made end product" means an article which is--

                         (i)  Wholly the growth, product or manufacture of the
                    United States, or

                         (ii) In the case of an article which consists in whole
                    or in part of materials from another country or
                    instrumentality, has been substantially transformed in the
                    United States into a new and distinct article of commerce
                    with a name, character, or use distinct from that of the
                    article or articles from which it was so transformed.

               (b)  This clause implements the Trade Agreements Act of 1979 (19
          U.S.C. 2501 et seq.), the North American Free Trade Agreement
          Implementation Act of 1993, and the Caribbean Basin Initiative by
          providing a preference for U.S. made end products and designated
          country end products over nondesignated country end products, except
          nondesignated country end products which are qualifying country end
          products, NAFTA country end products, or Caribbean Basin end products.

               (c)  The Contractor agrees to deliver under this contract only
          U.S. made end products unless, in its offer. It specified delivery of
          qualifying country, designated country, NAFTA country, or
          nondesignated country end products in the Buy American Act--Trade
          Agreements--Balance of Payments Program Certificate provision.

                    (1)  Offerors may not supply a nondesignated country end 
               product 

                                   00700-128
<PAGE>
 
        unless--

              (i)    It is a qualifying country end product, Caribbean Basin 
            country end product, or a NAFTA country end product;

              (ii)   The contracting Officer has determined that offers of
            U.S. made end products or qualifying, designated, NAFTA, or
            Caribbean Basin Country end products from responsive, responsible
            offerors are either not received or are insufficient to fill the
            Government's requirements; or

              (iii)  A national interest waiver has been granted under 
            section 302 of the Trade Agreements Act of 1979 (see FAR 
            2S.402(c)).

            (2)   An offer certifying that a qualifying country end product, a
          designated country and product, a NAFTA country end product, or a
          Caribbean Basin country end product will be supplied requires the
          Contractor to supply a qualifying country end product, a designated
          country end product, a NAFTA country end product, or a Caribbean Basin
          country end product, whichever is certified, or, at the Contractor's
          option, a U.S. made end product.

          (d)   The offered price of end products listed and certified under
     paragraphs (c) (2) (i) and (vi) of the Buy American Act--Trade Agreements--
     Balance of Payments Program Certificate provision of the solicitation must
     include all applicable duty. The offered price of qualifying country end
     products, designated country end products, NAFTA country end products, and
     Caribbean Basin country end products for line items subject to the Trade
     Agreements Act or the North American Free Trade Agreement Implementation
     Act, should not include custom fees or duty.

                                (End of clause)

92   252.225-7012   PREFERENCE FOR CERTAIN DOMESTIC COMMODITIES (NOV 1995)

          (a)  The Contractor agrees to deliver under this contract only such of
     the following articles that have been grown, reprocessed, reused, or
     produced in the United States, its possessions, or Puerto Rico--

               (1)  Food;
               (2)  Clothing;
               (3)  Tents, tarpaulins, or covers;
               (4)  Cotton and other natural fiber products;
               (5)  Woven silk or woven silk blends;
               (6)  Spun silk yarn for cartridge cloth;
               (7)  Synthetic fabric, and coated synthetic fabric;
               (8)  Canvas products;

                                   00700-129

<PAGE>

         (9)  Wool (whether in the form of fiber or yarn or contained in
       fabrics, materials, or manufactured articles); or

         (10) Any item of individual equipment manufactured from or containing 
       such fibers, yarns, fabrics, or materials.

       (b) This clause does not apply--

         (1)  To supplies listed in FAR 25.108(d)(1), or other supplies for 
      which the Government has determined that a satisfactory quality and
      sufficient quantity cannot be acquired as and when needed at U.S. market
      prices;

         (2)  To foods which have been manufactured or processed in the United 
       States, its possessions, or Puerto Rico;

         (3)  To chemical warfare protective clothing produced in the countries 
       listed in subsection 225.872-1 of the Defense FAR Supplement; or 

         (4)   To commercial items or components purchased from subcontractors 
       or suppliers.

                                (End of clause)

93   252.225-7026   REPORTING OF CONTRACT PERFORMANCE OUTSIDE THE UNTIED STATES 
                    (NOV 1995)

       (a) Reporting criteria.

       Reporting under this clause is required for--

         (1)  Offers exceeding $10 million, if the Offeror is aware at the time 
       the offer is submitted that it or its first-tier subcontractor intends to
       perform any part of the contract that exceeds $500,000 outside the United
       States and Canada, if that part could be performed inside the United
       States or Canada;

         (2)  Contracts exceeding $10 million, when any part that exceeds 
       $500,000 could be performed inside the United States or Canada, but will
       be performed outside the United States and Canada. If the information was
       submitted with the offer, it need not be resubmitted unless it changes;
       and

         (3)  Contracts exceeding $500,000, when any part that exceeds $25,000 
       will be performed outside the United States, unless a foreign place of
       performance is--

           (i)  The principal place of performance; and

           (ii) Indicated by the Offeror's entry in the Place of Performance 
       provision of the solicitation.

       (b) Submission of reports.

         (1)  The Offeror shall submit reports required by paragraph (a)(1) of 
       this clause with its offer.

         (2)  The Contractor shall submit reports required by paragraph (a)(2)
       of

                                  00700-130 




<PAGE>
 
     this clause to the Contracting Officer as soon as the information is known,
     with a copy to the addressee in paragraph (b) (3) of this clause. With
     respect to performance by a first-tier subcontractor, this information
     shall be reported, to the maximum extent practicable, at least 30 days
     before award of the subcontract.

          (3)  The Contractor shall submit reports required by paragraph (a) (3)
     of this clause within 10 days of the end of each Government quarter to--
     
               Deputy Director of Defense Procurement (Foreign Contracting)   
               OUSD (A&T) DP (FC)                                             
               Washington, DC 20301-3060                                      
                                                                              
          (4)  The Offeror/Contractor shall submit reports on DD Form 2139,
     Report of Contract Performance Outside the United States. Computer-
     generated reports are acceptable, provided the report contains all
     information required by DD Form 2139. Copies of DD Form 2139 may be
     obtained from the Contracting Officer.
                                                                              
     (c)  Flowdown requirements.                                              
                                                                              
          (1)  The Contractor shall include a clause substantially the same as
     this one in all first-tier subcontracts exceeding $100,00, except
     subcontracts for commercial items, construction, ores, natural gases,
     utilities, petroleum products and crudes, timber (logs), or subsistence.

          (2)  The Contractor shall provide the prime contract number to
     subcontractors for reporting purposes.
     
     (d)  Information required.                                               
                                                                              
          Information to be reported on the part of this contract performed
     outside the United States (or outside the United States and Canada for
     reports required by paragraphs (a) (1) and (a) (2) of this clause) includes
     that for--
                                                                              
               (i)   Subcontracts;                                            
                                                                              
               (ii)  Purchases; and                                           
                                                                              
               (iii) Intracompany transfers when transfers originate in a
          foreign location.

                                (End of clause)

94  252.225-7031   SECONDARY ARAB BOYCOTT OF ISRAEL (JUN 1992)

          (a)  Definitions.      
                            
          As used in this clause--
                             
               (1)  "Foreign person" means any person other than a United States
          person as defined in section 16(2) of the Export Administration Act of
          1979 (50 U.S.C. App. Sec 2415).

                                   00700-131


<PAGE>
 
          (2)   "United States person" is defined in section 15(2) of the Export
       Administration Act of 1979 and means any United States resident or
       national (other than an individual resident outside the United States and
       employed by other than a United States person), any domestic concern
       (including any permanent domestic establishment of any foreign concern),
       and any foreign subsidiary or affiliate (including any permanent foreign
       establishment) of any domestic concern which is controlled in fact by
       such domestic concern, as determined under regulations of the President.

       (b)   Certification.

       By submitting this offer, the Offeror, if a foreign person, company or
       entity, certifies that it--

          (1)   Does not comply with Secondary Arab Boycott of Israel; and 

          (2)   Is not taking or knowingly agreeing to take any action, with
       respect to the Secondary Boycott of Israel by Arab countries, which 50
       U.S.C. App. Sec 2407(a) prohibits a United States person from taking.

                                (End of clause)

95   252.225-7036   NORTH AMERICAN FREE TRADE AGREEMENT IMPLEMENTATION ACT (JAN
                    1994)

          (a)  Definitions.

            (1)   "Components," "domestic end product," "end product,"
          "nonqualifying country," "qualifying country," and "qualifying country
          end product" have the meanings given in the Buy American Act and
          Balance of Payments Program clause of this contract.

            (2)   "North American Free Trade Agreement (NAFTA) country" means 
          Canada or Mexico.

            (3)   "NAFTA country end product" means an article that--

               (i)   Is wholly the growth, product, or manufacture of a NAFTA 
            country; or

               (ii)  Has, in the case of an article which consists in whole or 
            in part of materials from another country or instrumentality, been
            substantially transformed in a NAFTA country into a new and
            different article of commerce with a name, character, or use
            distinct from that of the article or articles from which it was so
            transformed. The term includes services (except transportation
            services) incidental to its supply, provided that the value of those
            incidental services does not exceed the value of the product itself.
            It does not include service contracts as such

            (4)   "Non-NAFTA country end product" means any end product which is
          not a U.S. trade end product or a NAFTA country end product.

                                   00700-132
<PAGE>
 
               (5)  "United States" means the United States, its designated
          possessions, Puerto Rico, and any other place subject to its
          jurisdiction, but does not include leased bases or trust territories.

               (6)  "U.S. made end product" means an article which is--

                  (i)  Wholly the growth, product or manufacture of the United
               States, or

                  (ii) In the case of an article which consists in whole or in
               part of materials from another country or instrumentality, has
               been substantially transformed in the United States into a new
               and distinct article of commerce with a name, character, or use
               distinct from that of the article or articles from which it was
               so transformed.

          (b)  This clause implements the North American Free Trade Agreement
     Implementation Act of 1993 by providing a preference for U.S. made end
     products and NAFTA country end products over non-NAFTA country end
     products, except non-NAFTA country end products which are qualifying
     country end products.

          (c)  The Contractor agrees to deliver under this contract only U.S.
     made end products unless, in its offer, it specified delivery of qualifying
     country, NAFTA country, or non-NAFTA country end products in the Buy
     American Act--North American Free Trade Agreement Implementation Act--
     Balance of Payments Program Certificate provision. An offer certifying that
     a qualifying country end product or a NAFTA country end product will be
     supplied requires the Contractor to supply a qualifying country end product
     or a NAFTA country end product, whichever is certified, or, at the
     Contractor's option, a U.S. made end product.

          (d)  The offered price of end products listed and certified under
     paragraphs (c) (2) (i) and (iv) of the Buy American Act--North American
     Free Trade Agreement Implementation Act--Balance of Payments Program
     Certificate provision of the solicitation must include all applicable duty.
     The offered price of qualifying country end products or NAFTA country end
     products for line items subject to the North American Free Trade Agreement
     Implementation Act, should not include custom fees or duty.

                                (End of clause)

96   252.227-7000   NON-ESTOPPEL (OCT 1966)

          The Government reserves the right at any time to contest the 
     enforceability, validity, scope of, or the title to any patent or patent
     application herein licensed without waiving or forfeiting any right under
     this contract.

                                   00700-133
<PAGE>
 
                                (End of clause)

97   252.227-7022   GOVERNMENT RIGHTS (UNLIMITED) (MAR 1979)

          The Government shall have unlimited rights, in all drawings, designs, 
     specifications, notes and other works developed in the performance of this
     contract, including the right to use same on any other Government design or
     construction without additional compensation to the Contractor. The
     Contractor hereby grants to the Government a paid-up license throughout
     the world to all such works to which he may assert or establish any claim
     under design patent or copyright laws. The Contractor for a period of
     three (3) years after completion of the project agrees to furnish the
     original or copies of all such works on the request of the Contracting
     Officer.
                                (End of clause)

98   252.227-7023   DRAWINGS AND OTHER DATA TO BECOME PROPERTY OF GOVERNMENT
                    (MAR 1979)

          All designs, drawings, specifications, notes and other works developed
     in the performance of this contract shall become the sole property of the
     Government and may be used on any other design or construction without
     additional compensation to the Contractor. The Government shall be
     considered the "person for whom the work was prepared" for the purpose of
     authorship in any copyrightable work under 17 U.S.C. 201(b). With respect
     thereto, the Contractor agrees not to assert or authorize others to assert
     any rights nor establish any claim under the design patent or copyright
     laws. The Contractor for a period of three (3) years after completion of
     the project agrees to furnish all retained works on the request of the
     Contracting Officer. Unless otherwise provided in this contract, the
     Contractor shall have the right to retain copies of all works beyond such
     period.

                                (End of clause)

99   252.227-7033   RIGHTS IN SHOP DRAWINGS (APR 1966)

          (a)  Shop drawings for construction means drawings, submitted to the 
     Government by the Construction Contractor, subcontractor or any lower-tier
     subcontractor pursuant to a construction contract, showing in detail (i)
     the proposed fabrication and assembly of structural elements and (ii) the
     
                                   00700-134
<PAGE>
 
     installation (i.e., form, fit, and attachment details) of materials or
     equipment. The Government may duplicate, use, and disclosure in any manner
     and for any purpose shop drawings delivered under this contract.

       (b)  This clause, including this paragraph (b), shall be included in
     all subcontracts hereunder at any tier.

                                (End of clause)

100  252.231-7000   SUPPLEMENTAL COST PRINCIPLES (DEC 1991)

       When the allowability of costs under this contract is determined in
     accordance with Part 31 of the Federal Acquisition Regulation (FAR),
     allowability shall also be determined in accordance with Part 231 of the
     Defense FAR Supplement, in effect on the date of this contract.

                                (End of clause)

101  252.232-7006   REDUCTION OR SUSPENSION OF CONTRACT PAYMENTS UPON FINDING 
                    OF FRAUD (1992)

       (a) 10 U.S.C. 2307(e) permits the head of the agency to reduce or suspend
     further payments to the Contractor upon a written determination by the
     agency head that substantial evidence exists that the Contractor's request
     for advance, partial, or progress payments is based on fraud. The
     provisions of 10 U.S.C. 2307(e) are in addition to any other rights or
     remedies provided the Government by law or under contract.

       (b) Actions taken by the Government in accordance with 10 U.S.C. 2307(e) 
     shall not constitute an excusable delay under the Default clause of this
     contract or otherwise relieve the Contractor of its obligations to perform
     under this contract.

                                (End of clause)

102  252.236-7000   MODIFICATION PROPOSALS -- PRICE BREAKDOWN (DEC 1991)

       (a) The Contractor shall furnish a price breakdown, itemized as required 
     an within the time specified by the Contracting Officer, with any proposal
     for a contract modification.

       (b) The price breakdown--

           (1) Must include sufficient detail to permit an analysis of profit, 
       and of all costs for--

                                   00700-135



<PAGE>

           (i)   Material;

           (ii)  Labor;

           (iii) Equipment;

           (iv)  Subcontracts; and
      
           (v)   Overhead; and 
   
         (2) Must cover all work involved in the modification, whether the work 
     was deleted, added, or changed.

       (c) The Contractor shall provide similar price breakdowns to support any 
    amounts claimed for subcontracts.

       (d) The Contractor's proposal shall include a justification for any time 
     extension proposed.

                                (End of clause)
 
103  252.236-7008   CONTRACT PRICES--BIDDING SCHEDULES (DEC 1991)

       (a) The Government's payment for the items listed in the Bidding Schedule
     shall constitute full compensation to the Contractor for--
     
         (1) Furnishing all plant, labor, equipment, appliances, and materials;
     and

         (2) Performing all operations required to complete the work in
     conformity with the drawings and specifications.

       (b) The contractor shall include in the prices for the items listed in 
     the Bidding schedule all costs for work in the specifications, whether or
     not specifically listed in the Bidding Schedule.

                              (End of provision)

104  252.242-7000   POSTAWARD CONFERENCE (DEC 1991)

       The Contractor agrees to attend any postaward conference convened by the
     contracting activity or contract administration office in accordance with
     Federal Acquisition Regulation Subpart 42.5.

                                (End of clause)

105  252.243-7001   PRICING OF CONTRACT MODIFICATIONS (DEC 1991)

       When costs are a factor in any price adjustment under this contract, the
     contract costs principles and procedures in FAR Part 31 an DFARS Part 231,
     in effect on the date of this contract, apply.

                                   00700-136
<PAGE>
 
                                (End of clause)

106  252.247-7024   NOTIFICATION OF TRANSPORTATION OF SUPPLIES BY SEA (NOV 1995)

          (a)  The Contractor has indicated by the response to the solicitation
     provision, Representation of Extent of Transportation by Sea, that it did
     not anticipate transporting by sea any supplies. If, however, after the
     award of this contract, the Contractor learns that supplies, as defined in
     the Transportation of Supplies by Sea clause of this contract, will be
     transported by sea, the Contractor--

               (1)  Small notify the Contracting Officer of that fact; and

               (2) Hereby agrees to comply with all the terms and conditions of
          the Transportation of Suppliers by Sea clause of this contract.

          (b) The Contractor shall including this clause, including this
     paragraph (b), revised as necessary to reflect the relationship of the
     contracting parties, in all subcontracts hereunder, except (effective May
     1, 1996) subcontracts for the acquisition of commercial items or
     components.

                                (End of clause)

107  52.254-4       ALTERATIONS IN CONTRACT

     Portions of this contract are altered as follows:     

     The Contractor's subcontracting plan is hereby included and made a material
     part of this Contract pursuant to Contract Clause No. 14, "Small, Small
     Disadvantaged and Women-Owned Small Business Subcontracting Plan (Alternate
     I)" FAR 52.219-9.

                                   00700-137
<PAGE>

                                                                 CONTRACT: 92235
                                                                 ===============
                                                                 CC: PED, MDE
                                                                 FILE: 92235

              [LETTERHEAD OF DEPARTMENT OF THE ARMY APPEARS HERE]

[LOGO]


Pier 400 Project Office                                          06 April 1998
(97C0035-0028)                                   


SUBJECT: Request for Proposal


Pier 400 Constructors 
1925 Pier D Street
Long Beach, California 90802-1089

Gentlemen:

     Reference Contract No. DACW09-97-C-0035, Stage 2, Port of Los Angeles, Pier
400 Deep Draft, Navigation Improvements, San Pedro Bay, Los Angeles County, 
California.

     You are hereby requested to furnish a detailed Cost Proposal to perform the
following scope of work:

     Detailed cost breakdown for the Dredge "Florida" under the following
     conditions:
     1. Standby unit cost rate.
        -------
     2. Full operation unit cost rate to include various material 
        --------------
        classifications,
     3. Extended overhead rate

     Your proposal, including a complete break down of costs and/or credits, is 
to be submitted to the Project Engineer within ten (10) calendar days after 
receipt of this letter. The break down of costs shall include labor, equipment, 
overhead and profit for Pier 400 Constructors as well as any subcontractors.

     The break-down must be in sufficient detail as required by the contract 
clause entitled, "Modification of Proposals Price Break Down", to permit
comprehensive review of all materials, labor equipment, overhead costs, and
profit for all subcontractors costs as well as for the cost incurred by the
Prime Contractor.

     For indentification purposes, reference the assigned Activity No. WN028 on 
all correspondence regarding this matter. Should you have any questions 
regarding this matter, contact this office.

                                  Sincerely,
                                  /s/ Julie A. Martinez, 
                                  Julie A. Martinez, P.E.      
                                  Contracting Officer's Representative

Copies Furnished:
LADO Contract Files (DACW09-97-C-0035)
Area Office Reader File
Resident Office Reader File
CESPL-CO-CM (Bert Romero)
CESPL-PM-C (Ted Gula)
Julie Martinez
Bob Garda
<PAGE>
 
[LOGO]                  [LETTERHEAD OF DEPARTMENT OF THE ARMY]


                                  MAY 12 1997


       REPLY TO
       ATTENTION OF:

Office of the Chief
Procurement Branch


Pier 400 Constructors
2122 York Road
Oak Brook, Illinois 60521


Gentlemen:

     Transmitted for your information and files is an executed copy of Contract 
No. DACW09-97-C-0035 for Stage 2, Port of Los Angeles, Pier 400 Deep Draft, 
Navigation Improvements Los Angeles and Long Beach Harbors, San Pedro Bay, Los 
Angeles County, California, in the amount of $141,485,450.00.

     Enclosed are sample payroll forms setting forth the payroll information 
required to be furnished weekly by you and your subcontractors, together with 
instructions pertaining thereto. It is requested that you submit one copy only 
each week to the Project Engineer. Should you use other types of payroll forms, 
it is required that you attach DD Form 879, Statement of Compliance, to each 
                                            ----------------------- 
weekly submittal, an initial supply of which is enclosed. Additional copies of 
these forms may be obtained on request by calling (213)452-3252.

     Enclosed also is a copy of "Instructions to Contractor Relative to Labor 
Provision of Contract." Additionally, we have enclosed a supply of SF Form 1413,
Statement and Acknowledgement, which is to be submitted to the Project Engineer 
- -----------------------------
in accordance with Contract Clause entitled "Subcontractors."

     Your attention is invited to the following:

     a.  The Contract Clause entitled "Superintendence by the Contractor." A 
written designation of a foreman or superintendent stating his authority will be
furnished to the Contracting Officer, for approval, prior to the employment of 
such foreman or superintendent.

     b.  Four (4) copies of each of the Performance and Payment Bonds are 
forwarded to you with the delivery order. Please execute the original and two 
(2) copies of each Bond, in accordance with instruction on the reverse side of 
the Bonds and return directly to this office; and, in addition, observe the 
instruction which require typewritten or printed names under all signatures to 
the contract and bonds.

<PAGE>
 
                                      -2-

     A copy of the Department of Labor minimum wage decision included in your 
contract must be posted in a prominent and easily accessible place at the site 
of work so that all pages thereof are visible to your employees along with WH 
Publication 1321, "Notice to Employees", enclosed herewith.

     The Contract Clause entitled "Display of Hotline Poster" requires you to 
display DOD Hotline Posters (enclosed), if this contract is in the amount of $5 
million or more, unless you have established an internal reporting mechanism 
program.


                                             Sincerely,
                                           
                                             /s/ J. A. Eugino
                                             J. A. Eugino
                                             Contracting Officer

Enclosures
CF: Project Engineer, William Gallegos


<PAGE>
 
     DEFENSE
H  O  T  L  I  N  E
     FOR FRAUD, WASTE,
     ABUSE REPORTING
_______________________________________________________________________________
     800/424-9098-toll free
_______________________________________________________________________________
     223-5080-Autovon
_______________________________________________________________________________
     693-5080-FTS
_______________________________________________________________________________
     693-5080 Washington, D.C. Metro area.
_______________________________________________________________________________
     OR WRITE:

     DEFENSE HOTLINE
     THE PENTAGON
     WASHINGTON, D.C.
     20301 - 1900

     IDENTITIES OF WRITERS & CALLERS
     FULLY PROTECTED
     
<PAGE>
 
<TABLE> 
<S>                                               <C>                                                         <C> 
- ------------------------------------------------------------------------------------------------------------------------------------
                                                  DATE BOND EXECUTED (Must be same or later than date of
               PERFORMANCE BOND                   contract)                                                   OMB No.: 9000-0045
         (See instructions on reverse)                                                                         Expires: 09/30/98
- ------------------------------------------------------------------------------------------------------------------------------------
Public reporting burden for this collection of information is estimated to average 25 minutes per response, including the time for
reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the
collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information,
including suggestions for reducing this burden, to the FAR Secretariat (MVR), Federal Acquisition Policy Division, GSA, Washington,
DC 20405
- ------------------------------------------------------------------------------------------------------------------------------------
PRINCIPAL (Legal name and business address)                                     TYPE OF ORGANIZATION ("X" one)

  Pier 400 Constructors
  2122 York Road                                                                [_] INDIVIDUAL        [_] PARTNERSHIP
  Oak Brook, Illinois  60521                                                    [X] JOINT VENTURE     [_] CORPORATION
                                                                              ------------------------------------------------------
                                                                                STATE OF INCORPORATION

- ------------------------------------------------------------------------------------------------------------------------------------
SURETY(IES) (Names(s) and business address(es)                                                  PENAL SUM OF BOND
                                                                              ------------------------------------------------------
                                                                                MILLION(S)     THOUSAND(S)   HUNDRED(S)     CENTS
                                                                                   141            485           450           00
                                                                              ------------------------------------------------------
                                                                                CONTRACT DATE         CONTRACT NO.

                                                                                MAY 12 1997            DACW09-97-C-0035
- ------------------------------------------------------------------------------------------------------------------------------------
OBLIGATION:

We, the Principal and Surety(ies), are firmly bound to the United States of America (hereinafter called the Government) in the above
penal sum. For payment of the penal sum, we bind ourselves, our heirs, executors, administrators, and successors, jointly and 
severally. However, where the Sureties are corporations acting as co-sureties, we, the Sureties, bind ourselves in such sum "jointly
and severally" as well as "severally" only for the purpose of allowing a joint action or actions against any or all of us. For all 
other purposes, each Surety binds itself, jointly and severally with the Principal, for the payment of the sum shown opposite the 
name of the Surety. If no limit of liability is indicated, the limit of liability is the full amount of the penal sum.

CONDITIONS:

The Principal has entered into the contract identified above.

THEREFORE:

The above obligation is void if the Principal - 

     (a)(1) Performs and fulfills all the undertakings, covenants, terms, conditions, and agreements of the contract during the 
original term of the contract and any extensions thereof that are granted by the Government, with or without notice to the 
Surety(ies), and during the life of any guaranty required under the contract, and (2) performs and fulfills all the undertakings, 
covenants, terms conditions, and agreements of any and all duly authorized modifications of the contract that hereafter are made. 
Notice of those modifications to the Surety(ies) are waived.

     (b)  Pays to the Government the full amount of the taxes imposed by the Government, if the said contract is subject to the
Miller Act, (40 U.S.C. 270a-270e), which are collected, deducted, or withheld from wages paid by the Principal in carrying out the
construction contract with respect to which this bond is furnished.

WITNESS:

The Principal and Surety(ies) executed this performance bond and affixed their seals on the above date.
- ------------------------------------------------------------------------------------------------------------------------------------
                                                             PRINCIPAL
- ------------------------------------------------------------------------------------------------------------------------------------
               1.                                 2.                                 3.
SIGNATURE(S)

                                          (Seal)                            (Seal)                   (Seal)         Corporate
- ------------------------------------------------------------------------------------------------------------           Seal
NAME(S) &      1.                                 2.                                 3.               
 TITLE(S)
 (Typed)
- ------------------------------------------------------------------------------------------------------------------------------------
                                                      INDIVIDUAL SURETY(IES)
- ------------------------------------------------------------------------------------------------------------------------------------
               1.                                                       2.
SIGNATURE(S)   
                                                                 (Seal)                                                   (Seal)
- ------------------------------------------------------------------------------------------------------------------------------------
NAME(S)        1.                                                       2.
(Typed)
- ------------------------------------------------------------------------------------------------------------------------------------
                                                      CORPORATE SURETY(IES)
- ------------------------------------------------------------------------------------------------------------------------------------
SURETY A
- ------------------------------------------------------------------------------------------------------------------------------------
   NAME &                                                               STATE OF INC.        LIABILITY LIMIT
   ADDRESS                                                                                   $
- ------------------------------------------------------------------------------------------------------------
               1.                                                       2.                                          Corporate
SIGNATURE(S)                                                                                                           Seal

- ------------------------------------------------------------------------------------------------------------ 
   NAME(S) &    1.                                                      2.
   TITLE(S)
   (Typed)
- ------------------------------------------------------------------------------------------------------------------------------------
AUTHORIZED FOR LOCAL REPRODUCTION                                                                  STANDARD FORM 26 (REV. 5-98)
Previous edition not usable                                                              Prescribed by GSA-FAR (48 CFR) 63.228(b)
</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 
============================================================================================================== 
                            CORPORATE SURETY(IES) (CONTINUED)                                       
- -------------------------------------------------------------------------------------------------------------- 
<S>        <C>                                               <C>             <C>                    <C> 
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT         
   B       ADDRESS                                                           $                       
- --------------------------------------------------------------------------------------------------------------
          SIGNATURE(S)                                       2.                                     Corporate
                                                                                                      Seal        
- --------------------------------------------------------------------------------------------------------------  
            NAME(S)                                          2. 
          TITLES(S)  
           (Typed)    
- --------------------------------------------------------------------------------------------------------------  
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT          
   C       ADDRESS                                                           $
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate 
                                                                                                      Seal         
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.  
         TITLES(S)
          (Typed)     
- --------------------------------------------------------------------------------------------------------------  
 SURETY    NAME &                                             STATE OF INC.  LIABILITY LIMIT           
   D     ADDRESS                                                             $                       
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate 
                                                                                                      Seal         
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.  
         TITLES(S)    
          (Typed)        
- --------------------------------------------------------------------------------------------------------------    
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT         
   E       ADDRESS                                                           $                      
- --------------------------------------------------------------------------------------------------------------
          SIGNATURE(S)                                       2.                                     Corporate
                                                                                                      Seal
- --------------------------------------------------------------------------------------------------------------  
            NAME(S)                                          2. 
          TITLES(S)  
           (Typed)    
- --------------------------------------------------------------------------------------------------------------  
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT          
   F       ADDRESS                                                           $
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate 
                                                                                                      Seal          
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.  
         TITLES(S)               
          (Typed)     
- --------------------------------------------------------------------------------------------------------------  
 SURETY    NAME &                                             STATE OF INC.  LIABILITY LIMIT           
   G     ADDRESS                                                             $
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate  
                                                                                                      Seal           
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.                
         TITLES(S)                                                             
          (Typed)        
- --------------------------------------------------------------------------------------------------------------    
</TABLE> 

                ----------------------------------------------
                 BOND        RATE PER THOUSAND($)    TOTAL($)     
                 PREMIUM                                           
                ----------------------------------------------

                                 INSTRUCTIONS

1.   This form is authorized for use in connection with Government contracts. 
Any deviation from this form will require the written approval of the 
Administrator of General Services.

2.   Insert the full legal name and business address of the Principal in the
space designated "Principal" on the face of the form. An authorized person shall
sign the bond. Any person signing in a representative capacity (e.g., an
attorney-in-fact) must furnish evidence of authority if that representative is
not a member of the firm, partnership, or joint venture, or an officer of the
corporation involved.

3.   (a) Corporations executing the bond as sureties must appear on the 
Department of the Treasury's list of approved sureties and must act within 
the limitation listed therein. Where more than one corporate surety is involved,
their names and addresses shall appear in the spaces (Surety A, Surety B, etc.)
headed "CORPORATE SURETY(IES)." In the space designated "SURETY(IES)" on the
face of the form, insert only the letter identification of the sureties.

     (b)  Where individual sureties are involved, a completed Affidavit of 
Individual Surety (Standard Form 28) for each individual surety, shall accompany
the bond. The Government may require the surety to furnish additional 
substantiating information concerning their financial capability.

4.   Corporations executing the bond shall affix their corporate seals. 
Individuals shall execute the bond opposite the word "Corporate Seal" and shall 
affix an adhesive seal if executed in Maine, New Hampshire, or any other 
jurisdiction requiring adhesive seals.

5.   Type the name and title of each person signing this bond in the space 
provided.

================================================================================
                                              STANDARD FORM 25 (REV.5-96) BACK

<PAGE>
 
<TABLE> 
<CAPTION> 
===================================================================================================================================
                PERFORMANCE BOND           DATE BOND EXECUTED (Must be same or later than date of contract)    OMB No.: 9000-0045
         (SEE INSTRUCTIONS ON REVERSE)                                                                         Expires: 09/30/98
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                  <C> 
Public reporting burden for this collection of information is estimated to average 25 minutes per response, including the time
for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and 
reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection 
of information, including suggestions for reducing this burden, to the FAR Secretariat (MVR), Federal Acquisition Policy Division,
GSA, Washington, DC 20405
- -----------------------------------------------------------------------------------------------------------------------------------
PRINCIPAL (Legal name and business address)                                            TYPE OF ORGANIZATION ("X" one)

     Pier 400 Constructors                                                               [_]  INDIVIDUAL       [_]  PARTNERSHIP
     2122 York Road
     Oak Brook, Illinois  60521                                                          [X]  JOINT VENTURE    [_]  CORPORATION
                                                                                       --------------------------------------------
                                                                                       STATE OF INCORPORATION

- -----------------------------------------------------------------------------------------------------------------------------------
SURETY(IES) (Name(s) and business address(es)                                                      PENAL SUM OF BOND
                                                                                       --------------------------------------------
                                                                                       MILLION(S)  THOUSAND(S)  HUNDRED(S)  CENTS
                                                                                             141         485         450        00
                                                                                       --------------------------------------------
                                                                                       CONTRACT DATE        CONTRACT NO.

                                                                                       MAY 12 1997          DACW09-97-C-0035

===================================================================================================================================
OBLIGATION:

We, the Principal and Surety(ies), are firmly bound to the United States of America (hereinafter called the Government) in the 
above penal sum. For payment of the penal sum, we bind ourselves, our heirs, executors, administrators, and successors, jointly 
and severally. However, where the Sureties are corporations acting as co-sureties, we, the Sureties, bind ourselves in such sum
"jointly and severally" as well as "severally" only for the purpose of allowing a joint action or actions against any or all of 
us. For all purposes, each Surety binds itself, jointly and severally with the Principal, for the payment of the sum shown opposite
the name of the Surety. If no limit of liability is indicated, the limit of liability is the full amount of the penal sum.

CONDITIONS:

The Principal has entered into the contract identified above.

THEREFORE:

The above obligation is void if the Principal -
     
     (a)(1)  Performs and fulfills all the undertakings, covenants, terms, conditions, and agreements of the contract during the 
original term of the contract and any extensions thereof that are granted by the Government, with or without notice to the
Surety(ies), and during the life of any guaranty required under the contract, and (2) performs and fulfills all the undertakings,
covenants, terms, conditions, and agreement of any and all duly authorized modifications of the contract that hereafter are made.
Notice of those modifications to the Surety(ies) are waived.

     (b)     Pays to the Government the full amount of the taxes imposed by the Government, if the said contract is subject to
the Miller Act, (40 U.S.C. 270a-270e), which are collected, deducted, or withheld from wages paid by the Principal in carrying
out the construction contract with respect to which this bond is furnished.

WITNESS:

The Principal and Surety(ies) executed this performance bond and affixed their seals on the above date.

===================================================================================================================================
                                                               PRINCIPAL
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                            2.                               3.

SIGNATURE(S)
                                                 (Seal)                           (Seal)                      (Seal)     Corporate
- -----------------------------------------------------------------------------------------------------------------------
                            1.                            2.                               3.                               Seal
NAME(S) &
TITLE(S)
(Typed)
===================================================================================================================================
                                                       INDIVIDUAL SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.              
SIGNATURE(S)
                                                                 (Seal)                                                  (Seal) 
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                       
 NAME(S)
 (Typed)
===================================================================================================================================
                                                        CORPORATE SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                                                                                STATE OF INC.    LIABILITY LIMIT
 SURETY A      NAME &   
               ADDRESS                                                                           $
           ------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                                       Corporate
            SIGNATURE(S)                                                                                                    Seal
           ------------------------------------------------------------------------------------------------------------
              NAME(S) &     1.                                                  2.
               TITLE(S)
               (Typed)
===================================================================================================================================
AUTHORIZED FOR LOCAL REPRODUCTION                                                       STANDARD FORM 25 (REV. 5-96)
Previous edition not usable                                                             Prescribed by GSA-FAR (48 CFR) 53.228(b)
</TABLE> 

<PAGE>
 
<TABLE> 
<CAPTION> 
============================================================================================================== 
                            CORPORATE SURETY(IES) (CONTINUED)                                       
- -------------------------------------------------------------------------------------------------------------- 
<S>        <C>                                               <C>             <C>                    <C> 
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT         
   B       ADDRESS                                                           $                       
- --------------------------------------------------------------------------------------------------------------
          SIGNATURE(S)                                       2.                                     Corporate
                                                                                                      Seal        
- --------------------------------------------------------------------------------------------------------------  
            NAME(S)                                          2. 
          TITLES(S)  
           (Typed)    
- --------------------------------------------------------------------------------------------------------------  
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT          
   C       ADDRESS                                                           $
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate 
                                                                                                      Seal         
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.  
         TITLES(S)
          (Typed)     
- --------------------------------------------------------------------------------------------------------------  
 SURETY    NAME &                                             STATE OF INC.  LIABILITY LIMIT           
   D     ADDRESS                                                             $                       
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate 
                                                                                                      Seal         
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.  
         TITLES(S)    
          (Typed)        
- --------------------------------------------------------------------------------------------------------------    
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT         
   E       ADDRESS                                                           $                      
- --------------------------------------------------------------------------------------------------------------
          SIGNATURE(S)                                       2.                                     Corporate
                                                                                                      Seal
- --------------------------------------------------------------------------------------------------------------  
            NAME(S)                                          2. 
          TITLES(S)  
           (Typed)    
- --------------------------------------------------------------------------------------------------------------  
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT          
   F       ADDRESS                                                           $
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate 
                                                                                                      Seal          
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.  
         TITLES(S)               
          (Typed)     
- --------------------------------------------------------------------------------------------------------------  
 SURETY    NAME &                                             STATE OF INC.  LIABILITY LIMIT           
   G     ADDRESS                                                             $
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate  
                                                                                                      Seal           
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.                
         TITLES(S)                                                             
          (Typed)        
- --------------------------------------------------------------------------------------------------------------    
</TABLE> 

                ----------------------------------------------
                 BOND        RATE PER THOUSAND($)    TOTAL($)     
                 PREMIUM                                           
                ----------------------------------------------

                                 INSTRUCTIONS

1.   This form is authorized for use in connection with Government contracts. 
Any deviation from this form will require the written approval of the 
Administrator of General Services.

2.   Insert the full legal name and business address of the Principal in the
space designated "Principal" on the face of the form. An authorized person shall
sign the bond. Any person signing in a representative capacity (e.g., an
attorney-in-fact) must furnish evidence of authority if that representative is
not a member of the firm, partnership, or joint venture, or an officer of the
corporation involved.

3.   (a) Corporations executing the bond as sureties must appear on the 
Department of the Treasury's list of approved sureties and must act within 
the limitation listed therein. Where more than one corporate surety is involved,
their names and addresses shall appear in the spaces (Surety A, Surety B, etc.)
headed "CORPORATE SURETY(IES)." In the space designated "SURETY(IES)" on the
face of the form, insert only the letter identification of the sureties.

     (b)  Where individual sureties are involved, a completed Affidavit of 
Individual Surety (Standard Form 28) for each individual surety, shall accompany
the bond. The Government may require the surety to furnish additional 
substantiating information concerning their financial capability.

4.   Corporations executing the bond shall affix their corporate seals. 
Individuals shall execute the bond opposite the word "Corporate Seal" and shall 
affix an adhesive seal if executed in Maine, New Hampshire, or any other 
jurisdiction requiring adhesive seals.

5.   Type the name and title of each person signing this bond in the space 
provided.

================================================================================
                                              STANDARD FORM 25 (REV.5-96) BACK

<PAGE>
 
<TABLE> 
<CAPTION> 
===================================================================================================================================
<S>                                                                                  <C> 
                PERFORMANCE BOND           DATE BOND EXECUTED (Must be same or later than date of contract)    OMB No.: 9000-0045
         (SEE INSTRUCTIONS ON REVERSE)                                                                         Expires: 09/30/98
- -----------------------------------------------------------------------------------------------------------------------------------

Public reporting burden for this collection of information is estimated to average 25 minutes per response, including the time
for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and 
reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection 
of information, including suggestions for reducing this burden, to the FAR Secretariat (MVR), Federal Acquisition Policy Division,
GSA, Washington, DC 20405
- -----------------------------------------------------------------------------------------------------------------------------------
PRINCIPAL (Legal name and business address)                                            TYPE OF ORGANIZATION ("X" one)

     Pier 400 Constructors                                                               [_]  INDIVIDUAL       [_]  PARTNERSHIP
     2122 York Road
     Oak Brook, Illinois  60521                                                          [X]  JOINT VENTURE    [_]  CORPORATION
                                                                                       --------------------------------------------
                                                                                       STATE OF INCORPORATION

- -----------------------------------------------------------------------------------------------------------------------------------
SURETY(IES) (Name(s) and business address(es)                                                      PENAL SUM OF BOND
                                                                                       --------------------------------------------
                                                                                       MILLION(S)  THOUSAND(S)  HUNDRED(S)  CENTS
                                                                                         141         485          450        00
                                                                                       --------------------------------------------
                                                                                       CONTRACT DATE        CONTRACT NO.

                                                                                       MAY 12 1997          DACW09-97-C-0035

===================================================================================================================================
OBLIGATION:

We, the Principal and Surety(ies), are firmly bound to the United States of America (hereinafter called the Government) in the 
above penal sum. For payment of the penal sum, we bind ourselves, our heirs, executors, administrators, and successors, jointly 
and severally. However, where the Sureties are corporations acting as co-sureties, we, the Sureties, bind ourselves in such sum
"jointly and severally" as well as "severally" only for the purpose of allowing a joint action or actions against any or all of 
us. For all other purposes, each Surety binds itself, jointly and severally with the Principal, for the payment of the sum shown
opposite the name of the Surety. If no limit of liability is indicated, the limit of liability is the full amount of the penal sum.

CONDITIONS:

The Principal has entered into the contract identified above.

THEREFORE:

The above obligation is void if the Principal -
     
     (a)(1)  Performs and fulfills all the undertakings, covenants, terms, conditions, and agreements of the contract during the 
original term of the contract and any extensions thereof that are granted by the Government, with or without notice to the
Surety(ies), and during the life of any guaranty required under the contract, and (2) performs and fulfills all the undertakings,
covenants, terms, conditions, and agreements of any and all duly authorized modifications of the contract that hereafter are made.
Notice of those modifications to the to the Surety(ies) are waived.

     (b)     Pays to the Government the full amount of the taxes imposed by the Government, if the said contract is subject to
the Miller Act, (40 U.S.C. 270a-270e), which are collected, deducted, or withheld from wages paid by the Principal in carrying
out the construction contract with respect to which this bond is furnished.

WITNESS:

The Principal and Surety(ies) executed, this performance bond and affixed their seals on the above date.

===================================================================================================================================
                                                               PRINCIPAL
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                            2.                               3.

SIGNATURE(S)
                                                 (Seal)                           (Seal)                      (Seal)     Corporate
- -----------------------------------------------------------------------------------------------------------------------
                            1.                            2.                       3.                                       Seal
NAME(S) &
TITLE(S)
(Typed)
===================================================================================================================================
                                                       INDIVIDUAL SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.              
SIGNATURE(S)
                                                                 (Seal)                                                  (Seal) 
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                       
 NAME(S)
 (Typed)
===================================================================================================================================
                                                        CORPORATE SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                                                                                STATE OF INC.    LIABILITY LIMIT
 SURETY A      NAME &   
               ADDRESS                                                                           $
           ------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                                       Corporate
            SIGNATURE(S)                                                                                                    Seal
           ------------------------------------------------------------------------------------------------------------
              NAME(S) &     1.                                                  2.
               TITLE(S)
               (Typed)
===================================================================================================================================
AUTHORIZED FOR LOCAL REPRODUCTION                                                       STANDARD FORM 25 (REV. 5-96)
Previous edition not usable                                                             Prescribed by GSA-FAR (48 CFR) 53.228(b)
</TABLE> 


<PAGE>

<TABLE> 
<CAPTION> 
============================================================================================================== 
                            CORPORATE SURETY(IES) (CONTINUED)                                       
- -------------------------------------------------------------------------------------------------------------- 
<S>        <C>                                               <C>             <C>                    <C> 
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT         
   B       ADDRESS                                                           $                       
- --------------------------------------------------------------------------------------------------------------
          SIGNATURE(S)                                       2.                                     Corporate
                                                                                                      Seal        
- --------------------------------------------------------------------------------------------------------------  
            NAME(S)                                          2. 
          TITLES(S)  
           (Typed)    
- --------------------------------------------------------------------------------------------------------------  
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT          
   C       ADDRESS                                                           $
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate 
                                                                                                      Seal         
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.  
         TITLES(S)
          (Typed)     
- --------------------------------------------------------------------------------------------------------------  
 SURETY    NAME &                                             STATE OF INC.  LIABILITY LIMIT           
   D     ADDRESS                                                             $                       
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate 
                                                                                                      Seal         
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.  
         TITLES(S)    
          (Typed)        
- --------------------------------------------------------------------------------------------------------------    
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT         
   E       ADDRESS                                                           $                      
- --------------------------------------------------------------------------------------------------------------
          SIGNATURE(S)                                       2.                                     Corporate
                                                                                                      Seal
- --------------------------------------------------------------------------------------------------------------  
            NAME(S)                                          2. 
          TITLES(S)  
           (Typed)    
- --------------------------------------------------------------------------------------------------------------  
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT          
   F       ADDRESS                                                           $
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate 
                                                                                                      Seal          
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.  
         TITLES(S)               
          (Typed)     
- --------------------------------------------------------------------------------------------------------------  
 SURETY    NAME &                                             STATE OF INC.  LIABILITY LIMIT           
   G     ADDRESS                                                             $
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate  
                                                                                                      Seal           
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.                
         TITLES(S)                                                             
          (Typed)        
- --------------------------------------------------------------------------------------------------------------    
</TABLE> 

                ----------------------------------------------
                 BOND        RATE PER THOUSAND($)    TOTAL($)     
                 PREMIUM                                           
                ----------------------------------------------

                                 INSTRUCTIONS

1.   This form is authorized for use in connection with Government contracts. 
Any deviation from this form will require the written approval of the 
Administrator of General Services.

2.   Insert the full legal name and business address of the Principal in the
space designated "Principal" on the face of the form. An authorized person shall
sign the bond. Any person signing in a representative capacity (e.g., an
attorney-in-fact) must furnish evidence of authority if that representative is
not a member of the firm, partnership, or joint venture, or an officer of the
corporation involved.

3.   (a) Corporations executing the bond as sureties must appear on the 
Department of the Treasury's list of approved sureties and must act within 
the limitation listed therein. Where more than one corporate surety is involved,
their names and addresses shall appear in the spaces (Surety A, Surety B, etc.)
headed "CORPORATE SURETY(IES)." In the space designated "SURETY(IES)" on the
face of the form, insert only the letter identification of the sureties.

     (b)  Where individual sureties are involved, a completed Affidavit of 
Individual Surety (Standard Form 28) for each individual surety, shall accompany
the bond. The Government may require the surety to furnish additional 
substantiating information concerning their financial capability.

4.   Corporations executing the bond shall affix their corporate seals. 
Individuals shall execute the bond opposite the word "Corporate Seal" and shall 
affix an adhesive seal if executed in Maine, New Hampshire, or any other 
jurisdiction requiring adhesive seals.

5.   Type the name and title of each person signing this bond in the space 
provided.

================================================================================
                                              STANDARD FORM 25 (REV.5-96) BACK
<PAGE>

<TABLE> 
<CAPTION> 
===================================================================================================================================
                PERFORMANCE BOND           DATE BOND EXECUTED (Must be same or later than date of contract)    OMB No.: 9000-0045
         (SEE INSTRUCTIONS ON REVERSE)                                                                         Expires: 09/30/98
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                  <C> 
Public reporting burden for this collection of information is estimated to average 25 minutes per response, including the time
for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and 
reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection 
of information, including suggestions for reducing this burden, to the FAR Secretariat (MVR), Federal Acquisition Policy Division,
GSA, Washington, DC 20405
- -----------------------------------------------------------------------------------------------------------------------------------
PRINCIPAL (Legal name and business address)                                            TYPE OF ORGANIZATION ("X" one)

     Pier 400 Constructors                                                               [_]  INDIVIDUAL       [_]  PARTNERSHIP
     2122 York Road
     Oak Brook, Illinois  60521                                                          [X]  JOINT VENTURE    [_]  CORPORATION
                                                                                       --------------------------------------------
                                                                                       STATE OF INCORPORATION

- -----------------------------------------------------------------------------------------------------------------------------------
SURETY(IES) (Name(s) and business address(es)                                                      PENAL SUM OF BOND
                                                                                       --------------------------------------------
                                                                                       MILLION(S)  THOUSAND(S)  HUNDRED(S)  CENTS
                                                                                             141         485         450        00
                                                                                       --------------------------------------------
                                                                                       CONTRACT DATE        CONTRACT NO.

                                                                                       MAY 12 1997          DACW09-97-C-0035

===================================================================================================================================
OBLIGATION:

We, the Principal and Surety(ies), are firmly bound to the United States of America (hereinafter called the Government) in the 
above penal sum. For payment of the penal sum, we bind ourselves, our heirs, executors, administrators, and successors, jointly 
and severally. However, where the Sureties are corporations acting as co-sureties, we, the Sureties, bind ourselves in such sum
"jointly and severally" as well as "severally" only for the purpose of allowing a joint action or actions against any or all of 
us. For all other purposes, each Surety binds itself, jointly and severally with the Principal, for the payment of the sum shown
opposite the name of the Surety. If no limit of liability is indicated, the limit of liability is the full amount of the penal sum.

CONDITIONS:

The Principal has entered into the contract identified above.

THEREFORE:

The above obligation is void if the Principal -
     
     (a)(1)  Performs and fulfills all the undertakings, covenants, terms, conditions, and agreements of the contract during the 
original term of the contract and any extensions thereof that are granted by the Government, with or without notice to the
Surety(ies), and during the life of any guaranty required under the contract, and (2) performs and fulfills all the undertakings,
covenants, terms, conditions, and agreement of any and all duly authorized modifications of the contract that hereafter are made.
Notice of those modifications to the Surety(ies) are waived.

     (b)     Pays to the Government the full amount of the taxes imposed by the Government, if the said contract is subject to
the Miller Act, (40 U.S.C. 270a-270e), which are collected, deducted, or withheld from wages paid by the Principal in carrying
out the construction contract with respect to which this bond is furnished.

WITNESS:

The Principal and Surety(ies) executed, this performance bond and affixed their seals on the above date.

===================================================================================================================================
                                                               PRINCIPAL
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                            2.                               3.

SIGNATURE(S)
                                                 (Seal)                           (Seal)                      (Seal)     Corporate
- -----------------------------------------------------------------------------------------------------------------------
                            1.                            2.                               3.                               Seal
NAME(S) &
TITLE(S)
(Typed)
===================================================================================================================================
                                                       INDIVIDUAL SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.              
SIGNATURE(S)
                                                                 (Seal)                                                  (Seal) 
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                       
 NAME(S)
 (Typed)
===================================================================================================================================
                                                        CORPORATE SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                                                                                STATE OF INC.    LIABILITY LIMIT
 SURETY A      NAME &   
               ADDRESS                                                                           $
           ------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                                       Corporate
            SIGNATURE(S)                                                                                                    Seal
           ------------------------------------------------------------------------------------------------------------
              NAME(S) &     1.                                                  2.
               TITLE(S)
               (Typed)
===================================================================================================================================
AUTHORIZED FOR LOCAL REPRODUCTION                                                       STANDARD FORM 25 (REV. 5-96)
Previous edition not usable                                                             Prescribed by GSA-FAR (48 CFR) 53.228(b)
</TABLE> 

<PAGE>

<TABLE> 
<CAPTION> 
============================================================================================================== 
                            CORPORATE SURETY(IES) (CONTINUED)                                       
- -------------------------------------------------------------------------------------------------------------- 
<S>        <C>                                               <C>             <C>                    <C> 
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT         
   B       ADDRESS                                                           $                       
- --------------------------------------------------------------------------------------------------------------
          SIGNATURE(S)                                       2.                                     Corporate
                                                                                                      Seal        
- --------------------------------------------------------------------------------------------------------------  
            NAME(S)                                          2. 
          TITLES(S)  
           (Typed)    
- --------------------------------------------------------------------------------------------------------------  
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT          
   C       ADDRESS                                                           $
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate 
                                                                                                      Seal         
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.  
         TITLES(S)
          (Typed)     
- --------------------------------------------------------------------------------------------------------------  
 SURETY    NAME &                                             STATE OF INC.  LIABILITY LIMIT           
   D     ADDRESS                                                             $                       
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate 
                                                                                                      Seal         
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.  
         TITLES(S)    
          (Typed)        
- --------------------------------------------------------------------------------------------------------------    
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT         
   E       ADDRESS                                                           $                      
- --------------------------------------------------------------------------------------------------------------
          SIGNATURE(S)                                       2.                                     Corporate
                                                                                                      Seal
- --------------------------------------------------------------------------------------------------------------  
            NAME(S)                                          2. 
          TITLES(S)  
           (Typed)    
- --------------------------------------------------------------------------------------------------------------  
 SURETY     NAME &                                           STATE OF INC.   LIABILITY LIMIT          
   F       ADDRESS                                                           $
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate 
                                                                                                      Seal          
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.  
         TITLES(S)               
          (Typed)     
- --------------------------------------------------------------------------------------------------------------  
 SURETY    NAME &                                             STATE OF INC.  LIABILITY LIMIT           
   G     ADDRESS                                                             $
- --------------------------------------------------------------------------------------------------------------  
         SIGNATURE(S)                                         2.                                    Corporate  
                                                                                                      Seal           
- --------------------------------------------------------------------------------------------------------------  
           NAME(S)                                            2.                
         TITLES(S)                                                             
          (Typed)        
- --------------------------------------------------------------------------------------------------------------    
</TABLE> 

                ----------------------------------------------
                 BOND        RATE PER THOUSAND($)    TOTAL($)     
                 PREMIUM                                           
                ----------------------------------------------

                                 INSTRUCTIONS

1.   This form is authorized for use in connection with Government contracts. 
Any deviation from this form will require the written approval of the 
Administrator of General Services.

2.   Insert the full legal name and business address of the Principal in the
space designated "Principal" on the face of the form. An authorized person shall
sign the bond. Any person signing in a representative capacity (e.g., an
attorney-in-fact) must furnish evidence of authority if that representative is
not a member of the firm, partnership, or joint venture, or an officer of the
corporation involved.

3.   (a) Corporations executing the bond as sureties must appear on the 
Department of the Treasury's list of approved sureties and must act within 
the limitation listed therein. Where more than one corporate surety is involved,
their names and addresses shall appear in the spaces (Surety A, Surety B, etc.)
headed "CORPORATE SURETY(IES)." In the space designated "SURETY(IES)" on the
face of the form, insert only the letter identification of the sureties.

     (b) Where individual sureties are involved, a completed Affidavit of
Individual Surety (Standard Form 28) for each individual surety, shall accompany
the bond. The Government may require the surety to furnish additional
substantiating information concerning their financial capability.

4.   Corporations executing the bond shall affix their corporate seals. 
Individuals shall execute the bond opposite the word "Corporate Seal" and shall 
affix an adhesive seal if executed in Maine, New Hampshire, or any other 
jurisdiction requiring adhesive seals.

5.   Type the name and title of each person signing this bond in the space 
provided.

================================================================================
                                              STANDARD FORM 25 (REV.5-96) BACK

<PAGE>
 
<TABLE> 
<CAPTION> 
===================================================================================================================================
                PAYMENT BOND               DATE BOND EXECUTED (Must be same or later than date of contract)    FORM APPROVED
         (see instructions on reverse)                                                                         OMB No.: 9000-0045 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                  <C> 
Public reporting burden for this collection of information is estimated to average 25 minutes per response, including the time
for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and 
reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection 
of information, including suggestions for reducing this burden, to the FAR Secretariat (MVR),  Office of Federal Acquisition 
Policy GSA, Washington, DC 20405: and to the Office of Management and Budget. Paperwork Reduction Project (8000-004?^). Washington, 
D.C. 20503.
- -----------------------------------------------------------------------------------------------------------------------------------
PRINCIPAL (Legal name and business address)                                            TYPE OF ORGANIZATION ("X" one)

     Pier 400 Constructors                                                               [_]  INDIVIDUAL       [_]  PARTNERSHIP
     2122 York Road
     Oak Brook, Illinois  60521                                                          [X]  JOINT VENTURE    [_]  CORPORATION
                                                                                       --------------------------------------------
                                                                                       STATE OF INCORPORATION

- -----------------------------------------------------------------------------------------------------------------------------------
SURETY(IES) (Name(s) and business address(es)                                                      PENAL SUM OF BOND
                                                                                       --------------------------------------------
                                                                                       MILLION(S)  THOUSAND(S)  HUNDRED(S)  CENTS
                                                                                           2           500         000        00
                                                                                       --------------------------------------------
                                                                                       CONTRACT DATE        CONTRACT NO.

                                                                                       MAY 12 1997          DACW09-97-C-0035

===================================================================================================================================


OBLIGATION:

We, the Principal and Surety(ies), are firmly bound to the United States of America (hereinafter called the Government) in the 
above penal sum. For payment of the penal sum, we bind ourselves, our heirs, executors, administrators, and successors, jointly 
and severally. However, where the Sureties are corporations acting as co-sureties, we, the Sureties, bind ourselves in such sum
"jointly and severally" as well as "severally" only for the purpose of allowing a joint action or actions against any or all of 
us. For all other purposes, each Surety binds itself, jointly and severally with the Principal, for the payment of the sum shown
opposite the name of the Surety. If no limit of liability is indicated, the limit of liability is the full amount of the penal sum.

CONDITIONS:

The above obligation is void if the Principal promptly makes payment to all persons having a direct relationship with the 
Principal or a subcontractor of the Principal for furnishing labor, material or both in the prosecution of the work provided for 
in the contract indentified above, and any authorized modifications of the contract that subsequently are made. Motice of those
modifications to the Surety(ies) are waived.
     
WITNESS:

The Principal and Surety(ies) executed, this payment bond and affixed their seals on the above date.

===================================================================================================================================
                                                               PRINCIPAL
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                            2.                               3.

SIGNATURE(S)
                                                 (Seal)                           (Seal)                      (Seal)     Corporate
- -----------------------------------------------------------------------------------------------------------------------
                            1.                            2.                               3.                               Seal
NAME(S) &
TITLE(S)
(Typed)
===================================================================================================================================
                                                       INDIVIDUAL SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.              
SIGNATURE(S)
                                                                 (Seal)                                                  (Seal) 
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                       
 NAME(S)
 (Typed)
===================================================================================================================================
                                                        CORPORATE SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                                                                                STATE OF INC.    LIABILITY LIMIT
 SURETY A      NAME &   
               ADDRESS                                                                           $
           ------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                                       Corporate
            SIGNATURE(S)                                                                                                    Seal
           ------------------------------------------------------------------------------------------------------------
              NAME(S) &     1.                                                  2.
               TITLE(S)
               (Typed)
===================================================================================================================================
NSN 4340-01-152-8061                 EXPIRATION DATE 12-31-82           25-205             STANDARD FORM 25-A          (REV. 1-??^)
Previous edition not usable                                                                Prescribed by GSA-FAR (48 CFR) 53.228(b)
</TABLE> 

<PAGE>
 
<TABLE> 
<CAPTION>  
- ---------------------------------------------------------------------------------------------------------- 
                       CORPORATE SURETY(IES) (Continued)
- ---------------------------------------------------------------------------------------------------------- 
<S>           <C>           <C>          <C>          <C>          <C>                 <C>   
SURETY B      SURETY C      SURETY D     SURETY E     SURETY F     SURETY G
- --------------------------------------------------------------------------------
NAME &        1.                        STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                        $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal    
NAME(S) &     1.                  2. 
TITLE(S)
Type(s)     
- --------------------------------------------------------------------------------
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal    
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ----------------------------------------------------------------------------------------------------------
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate 
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
</TABLE> 

                                 INSTRUCTIONS

1.  This form, for the protection of persons supplying labor and material, is 
used when a payment bond is required under the Act of August 24, 1935, 49 Stat. 
793 (40 U.S.C. 270a-270e). Any deviation from this form will require the written
approval of the Administrator of General Services.

2.  Insert the full legal name and business address of the Principal in the 
space designated "Principal" on the face of the form. An authorized person shall
sign the bond. Any person signing in a representative capacity (e.g., an 
attorney-in-fact) must furnish evidence of authority if that representative is 
not a member of the firm, partnership or joint venture, or an officer of the  
corporation involved.

3. (a) Corporations executing the bond as sureties must appear on the Department
of the Treasury's list of approved sureties and must act within the limitation 
listed therein. Where more than one corporate surety is involved, their names
and addresses shall appear in the spaces (Surety A, Surety B, etc.) headed
CORPORATE SURETY(IES)." In the space designated "SURETY(IES)" on the face of the
form, insert only the letter identification of the sureties.

  (b)  Where individual sureties are involved, a completed Affidavit of 
Individual Surety (Standard Form 28) for each individual surety, shall accompany
the bond. The Government may require the surety to furnish additional 
substantiating information concerning their financial capability.

4.  Corporations executing thee bond shall affix their corporate seals. 
Individuals shall execute the bond opposite the word "Corporate Seal", and 
shall affix an adhesive seal if executed in Maine, New Hampshire, or any other 
jurisdiction requiring adhesive seals.

5.  Type the name and title of each person signing this bond in the space 
provided.

- -------------------------------------------------------------------------------
<PAGE>
 
<TABLE> 
<CAPTION> 
===================================================================================================================================
                PERFORMANCE BOND           DATE BOND EXECUTED (Must be same or later than date of contract)    FORM APPROVED
         (see instructions on reverse)                                                                         OMB No.: 9000-0045 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                  <C> 
Public reporting burden for this collection of information is estimated to average 25 minutes per response, including the time
for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and 
reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection 
of information, including suggestions for reducing this burden, to the FAR Secretariat (VRS), Office of Federal Acquisition Policy
Division, GSA, Washington, DC 20405: One to the Office of Management and Budget. Paperwork Reduction Project (9000-0045). Washington
D.C. 20503.
- -----------------------------------------------------------------------------------------------------------------------------------
PRINCIPAL (Legal name and business address)                                            TYPE OF ORGANIZATION ("X" one)

     Pier 400 Constructors                                                               [_]  INDIVIDUAL       [_]  PARTNERSHIP
     2122 York Road
     Oak Brook, Illinois  60521                                                          [X]  JOINT VENTURE    [_]  CORPORATION
                                                                                       --------------------------------------------
                                                                                       STATE OF INCORPORATION

- -----------------------------------------------------------------------------------------------------------------------------------
SURETY(IES) (Name(s) and business address(es)                                                      PENAL SUM OF BOND
                                                                                       --------------------------------------------
                                                                                       MILLION(S)  THOUSAND(S)  HUNDRED(S)  CENTS
                                                                                           2           500         000        00
                                                                                       --------------------------------------------
                                                                                       CONTRACT DATE        CONTRACT NO.

                                                                                       MAY 12 1997          DACW09-97-C-0035

===================================================================================================================================


OBLIGATION:

We, the Principal and Surety(ies), are firmly bound to the United States of America (hereinafter called the Government) in the 
above penal sum. For payment of the penal sum, we bind ourselves, our heirs, executors, administrators, and successors, jointly 
and severally. However, where the Sureties are corporations acting as co-sureties, we, the Sureties, bind ourselves in such sum
"jointly and severally" as well as "severally" only for the purpose of allowing a joint action or actions against any or all of 
us. For all other purposes, each Surety binds itself, jointly and severally with the Principal, for the payment of the sum shown
opposite the name of the Surety. If no limit of liability is indicated, the limit of liability is the full amount of the penal sum.

CONDITIONS:

The above obligation is void if the Principal promptly makes payment to all persons having a direct relationship with the 
Principal or a subcontractor of the Principal for furnishing labor, material or both in the prosecution of the work provided for 
in the contract indentified above, and any authorized modifications of the contract that subsequently are made. Notice of those
modifications to the Surety(ies) are waived.
     
WITNESS:

The Principal and Surety(ies) executed, this payment bond and affixed their seals on the above date.

===================================================================================================================================
                                                               PRINCIPAL
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                            2.                               3.

SIGNATURE(S)
                                                 (Seal)                           (Seal)                      (Seal)     Corporate
- -----------------------------------------------------------------------------------------------------------------------
                            1.                            2.                               3.                               Seal
NAME(S) &
TITLE(S)
(Typed)
===================================================================================================================================
                                                       INDIVIDUAL SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.              
SIGNATURE(S)
                                                                 (Seal)                                                  (Seal) 
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                       
 NAME(S)
 (Typed)
===================================================================================================================================
                                                        CORPORATE SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                                                                                STATE OF INC.    LIABILITY LIMIT
 SURETY A      NAME &   
               ADDRESS                                                                           $
           ------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                                       Corporate
            SIGNATURE(S)                                                                                                    Seal
           ------------------------------------------------------------------------------------------------------------
              NAME(S) &     1.                                                  2.
               TITLE(S)
               (Typed)
===================================================================================================================================
NSN 4340-01-152-8081                 EXPIRATION DATE 12-31-92           25-205             STANDARD FORM 25-A           (REV. 1-??)
Previous edition not usable                                                                Prescribed by GSA-FAR (48 CFR) 53.228(b)
</TABLE> 

 
<PAGE>

<TABLE> 
<CAPTION>  
- ---------------------------------------------------------------------------------------------------------- 
                       CORPORATE SURETY(IES) (Continued)
- ---------------------------------------------------------------------------------------------------------- 
<S>           <C>           <C>          <C>          <C>          <C>                 <C>   
SURETY B      SURETY C      SURETY D     SURETY E     SURETY F     SURETY G
- --------------------------------------------------------------------------------
NAME &        1.                        STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                        $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal    
NAME(S) &     1.                  2. 
TITLE(S)
Type(s)     
- --------------------------------------------------------------------------------
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal    
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ----------------------------------------------------------------------------------------------------------
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate 
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
</TABLE> 

                                 INSTRUCTIONS

1.  This form, for the protection of persons supplying labor and material, is 
used when a payment bond is required under the Act of August 24, 1935, 49 Stat. 
793 (40 U.S.C. 270a-270e). Any deviation from this form will require the written
approval of the Administrator of General Services.

2.  Insert the full legal name and business address of the Principal in the 
space designated "Principal" on the face of the form. An authorized person shall
sign the bond. Any person signing in a representative capacity (e.g., an 
attorney-in-fact) must furnish evidence of authority if that representative is 
not a member of the firm, partnership or joint venture, or an officer of the  
corporation involved.

3. (a) Corporations executing the bond as sureties must appear on the Department
of the Treasury's list of approved sureties and must act within the limitation 
listed therein. Where more than on corporate surety is involved, their names and
addresses shall appear in the spaces (Surety A, Surety B, etc.) headed 
CORPORATE SURETY(IES)." In the space designated "SURETY(IES)" on the face of the
form, insert only the letter identification of the sureties.

  (b)  Where individual sureties are involved, a completed Affidavit of 
individual Surety (Standard Form 28) for each individual surety, shall accompany
the bond. The Government may require the surety to furnish additional 
substantiating information concerning their financial capability.

4.  Corporations executing thee bond shall affix their corporate seals. 
Individuals shall execute the bond opposite the word "Corporate Seal", and shall
affix an adhesive seal if executed in Maine, New Hampshire, or any other
jurisdiction requiring adhesive seals.

5.  Type the name and title of each person signing this bond in the space 
provided.

- --------------------------------------------------------------------------------
<PAGE>
 
<TABLE> 
<CAPTION> 
===================================================================================================================================
                PAYMENT BOND               DATE BOND EXECUTED (Must be same or later than date of contract)    FORM APPROVED
         (see instructions on reverse)                                                                         OMB No.: 9000-0045 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                  <C> 
Public reporting burden for this collection of information is estimated to average 25 minutes per response, including the time
for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and 
reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection 
of information, including suggestions for reducing this burden, to the FAR Secretariat (VRS), Federal Office of Acquisition Policy
Division, GSA, Washington, DC 20405: and to the Office of Management and Budget, Paperwork Reduction Project (9000-0045).
Washington, D.C. 20503.
- -----------------------------------------------------------------------------------------------------------------------------------
PRINCIPAL (Legal name and business address)                                            TYPE OF ORGANIZATION ("X" one)

     Pier 400 Constructors                                                               [_]  INDIVIDUAL       [_]  PARTNERSHIP
     2122 York Road
     Oak Brook, Illinois  60521                                                          [X]  JOINT VENTURE    [_]  CORPORATION
                                                                                       --------------------------------------------
                                                                                       STATE OF INCORPORATION

- -----------------------------------------------------------------------------------------------------------------------------------
SURETY(IES) (Name(s) and business address(es))                                                     PENAL SUM OF BOND
                                                                                       --------------------------------------------
                                                                                       MILLION(S)  THOUSAND(S)  HUNDRED(S)  CENTS
                                                                                           2           500         000        00
                                                                                       --------------------------------------------
                                                                                       CONTRACT DATE        CONTRACT NO.

                                                                                       MAY 12 1997          DACW09-97-C-0035

===================================================================================================================================


OBLIGATION:

We, the Principal and Surety(ies), are firmly bound to the United States of America (hereinafter called the Government) in the 
above penal sum. For payment of the penal sum, we bind ourselves, our heirs, executors, administrators, and successors, jointly 
and severally. However, where the Sureties are corporations acting as co-sureties, we, the Sureties, bind ourselves in such sum
"jointly and severally" as well as "severally" only for the purpose of allowing a joint action or actions against any or all of 
us. For all other purposes, each Surety binds itself, jointly and severally with the Principal, for the payment of the sum shown
opposite the name of the Surety. If no limit of liability is indicated, the limit of liability is the full amount of the penal sum.

CONDITIONS:

The above obligation is void if the Principal promptly makes payment to all persons having a direct relationship with the 
Principal or a subcontractor of the Principal for furnishing labor, material or both in the prosecution of the work provided for 
in the contract indentified above, and any authorized modifications of the contract that subsequently are made. Notice of those
modifications to the Surety(ies) are waived.
     
WITNESS:

The Principal and Surety(ies) executed, this performance bond and affixed their seals on the above date.

===================================================================================================================================
                                                               PRINCIPAL
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                            2.                               3.

SIGNATURE(S)
                                                 (Seal)                           (Seal)                      (Seal)     Corporate
- -----------------------------------------------------------------------------------------------------------------------
                            1.                            2.                               3.                               Seal
NAME(S) &
TITLE(S)
(Typed)
===================================================================================================================================
                                                       INDIVIDUAL SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.              
SIGNATURE(S)
                                                                 (Seal)                                                  (Seal) 
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                       
 NAME(S)
 (Typed)
===================================================================================================================================
                                                        CORPORATE SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                                                                                STATE OF INC.    LIABILITY LIMIT
 SURETY A      NAME &   
               ADDRESS                                                                           $
           ------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                                       Corporate
            SIGNATURE(S)                                                                                                    Seal
           ------------------------------------------------------------------------------------------------------------
              NAME(S) &     1.                                                  2.
               TITLE(S)
               (Typed)
===================================================================================================================================
NSN 4340-01-152-8081                 EXPIRATION DATE 12-31-92           25-205             STANDARD FORM 25-A          (REV. 1-??)^
Previous edition not usable                                                                Prescribed by GSA-FAR (48 CFR) 53.228(b)
</TABLE> 


<PAGE>
 
<TABLE> 
<CAPTION>  
- ---------------------------------------------------------------------------------------------------------- 
                       CORPORATE SURETY(IES) (Continued)
- ---------------------------------------------------------------------------------------------------------- 
<S>           <C>           <C>          <C>          <C>          <C>                 <C>   
SURETY B      SURETY C      SURETY D     SURETY E     SURETY F     SURETY G
- --------------------------------------------------------------------------------
NAME &        1.                        STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                        $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal    
NAME(S) &     1.                  2. 
TITLE(S)
Type(s)     
- --------------------------------------------------------------------------------
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal    
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ----------------------------------------------------------------------------------------------------------
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate 
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
</TABLE> 

                                 INSTRUCTIONS

1.  This form, for the protection of persons supplying labor and material, is 
used when a payment bond is required under the Act of August 24, 1935, 49 Stat. 
793 (40 U.S.C. 270a-270e). Any deviation from this form will require the written
approval of the Administrator of General Services.

2.  Insert the full legal name and business address of the Principal in the 
space designated "Principal" on the face of the form. An authorized person shall
sign the bond. Any person signing in a representative capacity (e.g., an 
attorney-in-fact) must furnish evidence of authority if that representative is 
not a member of the firm, partnership or joint venture, or an officer of the  
corporation involved.

3. (a) Corporations executing the bond as sureties must appear on the Department
of the Treasury's list of approved sureties and must act within the limitation 
listed therein. Where more than on corporate surety is involved, their names and
addresses shall appear in the spaces (Surety A, Surety B, etc.) headed 
CORPORATE SURETY(IES)." In the space designated "SURETY(IES)" on the face of the
form, insert only the letter identification of the sureties.

  (b)  Where individual sureties are involved, a completed Affidavit of 
individual Surety (Standard Form 28) for each individual surety, shall accompany
the bond. The Government may require the surety to furnish additional 
substantiating information concerning their financial capability.

4.  Corporations executing thee bond shall affix their corporate seals. 
Individuals shall execute the bond opposite the word "Corporate Seal", and 
shall affix an adhesive seal if executed in Maine, New Hampshire, or any other 
jurisdiction requiring adhesive seals.

5.  Type the name and title of each person signing this bond in the space 
provided.

- --------------------------------------------------------------------------------
<PAGE>
 
<TABLE> 
<CAPTION> 
===================================================================================================================================
<S>                                                                                  <C> 
                   PAYMENT BOND            DATE BOND EXECUTED (Must be same or later than date of contract)    FORM APPROVED
         (see instructions on reverse)                                                                         OMB No.: 9000-0045 
- -----------------------------------------------------------------------------------------------------------------------------------
Public reporting burden for this collection of information is estimated to average 25 minutes per response, including the time
for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and 
reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection 
of information, including suggestions for reducing this burden, to the FAR Secretariat (VRS), Office of Federal Acquisition Policy,
Washington, DC 20405 one to the Office of Management and Budget. Paperwork Reduction Pro??^:(9000-0045). Washington D.C. 20502.
- -----------------------------------------------------------------------------------------------------------------------------------
PRINCIPAL (Legal name and business address)                                            TYPE OF ORGANIZATION ("X" one)

     Pier 400 Constructors                                                               [_]  INDIVIDUAL       [_]  PARTNERSHIP
     2122 York Road
     Oak Brook, Illinois  60521                                                          [X]  JOINT VENTURE    [_]  CORPORATION
                                                                                       --------------------------------------------
                                                                                       STATE OF INCORPORATION

- -----------------------------------------------------------------------------------------------------------------------------------
SURETY(IES) (Name(s) and business address(es)                                                      PENAL SUM OF BOND
                                                                                       --------------------------------------------
                                                                                       MILLION(S)  THOUSAND(S)  HUNDRED(S)  CENTS
                                                                                           2           500         000        00
                                                                                       --------------------------------------------
                                                                                       CONTRACT DATE        CONTRACT NO.

                                                                                       MAY 12 1997          DACW09-97-C-0035

===================================================================================================================================


OBLIGATION:

We, the Principal and Surety(ies), are firmly bound to the United States of America (hereinafter called the Government) in the 
above penal sum. For payment of the penal sum, we bind ourselves, our heirs, executors, administrators, and successors, jointly 
and severally. However, where the Sureties are corporations acting as co-sureties, we, the Sureties, bind ourselves in such sum
"jointly and severally" as well as "severally" only for the purpose of allowing a joint action or actions against any or all of 
us. For all other purposes, each Surety binds itself, jointly and severally with the Principal, for the payment of the sum shown
opposite the name of the Surety. If no limit of liability is indicated, the limit of liability is the full amount of the penal sum.

CONDITIONS:

The above obligation is void if the Principal promptly makes payment to all persons having a direct relationship with the 
Principal or a subcontractor of the Principal for furnishing labor, material or both in the prosecution of the work provided for 
in the contract indentified above, and any authorized modifications of the contract that subsequently are made. Notice of those
modifications to the Surety(ies) are waived.
     
WITNESS:

The Principal and Surety(ies) executed, this payment bond and affixed their seals on the above date.

===================================================================================================================================
                                                               PRINCIPAL
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                            2.                               3.

SIGNATURE(S)
                                                 (Seal)                           (Seal)                      (Seal)     Corporate
- -----------------------------------------------------------------------------------------------------------------------
                            1.                            2.                       3.                                       Seal
NAME(S) &
TITLE(S)
(Typed)
===================================================================================================================================
                                                       INDIVIDUAL SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.              
SIGNATURE(S)
                                                                 (Seal)                                                  (Seal) 
- -----------------------------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                       
 NAME(S)
 (Typed)
===================================================================================================================================
                                                        CORPORATE SURETY(IES)
- -----------------------------------------------------------------------------------------------------------------------------------
                                                                                STATE OF INC.    LIABILITY LIMIT
 SURETY A      NAME &   
               ADDRESS                                                                           $
           ------------------------------------------------------------------------------------------------------------
                            1.                                                  2.                                       Corporate
            SIGNATURE(S)                                                                                                    Seal
           ------------------------------------------------------------------------------------------------------------
              NAME(S) &     1.                                                  2.
               TITLE(S)
               (Typed)
===================================================================================================================================
NSN 4340-01-152-8081                 EXPIRATION DATE 12-31-82           25-205             STANDARD FORM 25-A           (REV. 1-??)
Previous edition not usable                                                                Prescribed by GSA-FAR (48 CFR) 53.228(b)
</TABLE> 

<PAGE>
 
<TABLE> 
<CAPTION>  
- ---------------------------------------------------------------------------------------------------------- 
                       CORPORATE SURETY(IES) (Continued)
- ---------------------------------------------------------------------------------------------------------- 
<S>           <C>           <C>          <C>          <C>          <C>                 <C>   
SURETY B      SURETY C      SURETY D     SURETY E     SURETY F     SURETY G
- --------------------------------------------------------------------------------
NAME &        1.                        STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                        $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal    
NAME(S) &     1.                  2. 
TITLE(S)
Type(s)     
- --------------------------------------------------------------------------------
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal    
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ----------------------------------------------------------------------------------------------------------
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
NAME &                                  STATE OF INC.         LIABILITY LIMIT 
ADDRESS                                                       $
- --------------------------------------------------------------------------------
SIGNATURE(S)                      2.                                                    Corporate 
- --------------------------------------------------------------------------------          Seal   
NAME(S) &     1.                  2.                                            
TITLE(S)
Type(s)     
- ---------------------------------------------------------------------------------------------------------- 
</TABLE> 

                                 INSTRUCTIONS

1.  This form, for the protection of persons supplying labor and material, is 
used when a payment bond is required under the Act of August 24, 1935, 49 Stat. 
793 (40 U.S.C. 270a-270e). Any deviation from this form will require the written
approval of the Administrator of General Services.

2.  Insert the full legal name and business address of the Principal in the 
space designated "Principal" on the face of the form. An authorized person shall
sign the bond. Any person signing in a representative capacity (e.g., an 
attorney-in-fact) must furnish evidence of authority if that representative is 
not a member of the firm, partnership or joint venture, or an officer of the 
corporation involved.

3. (a) Corporations executing the bond as sureties must appear on the Department
of the Treasury's list of approved sureties and must act within the limitation 
listed therein. Where more than on corporate surety is involved, their names and
addresses shall appear in the spaces (Surety A, Surety B, etc.) headed 
CORPORATE SURETY(IES)." In the space designated "SURETY(IES)" on the face of the
form, insert only the letter identification of the sureties.

  (b)  Where individual sureties are involved, a completed Affidavit of 
individual Surety (Standard Form 28) for each individual surety, shall accompany
the bond. The Government may require the surety to furnish additional 
substantiating information concerning their financial capability.

4.  Corporations executing thee bond shall affix their corporate seals. 
Individuals shall execute the bond opposite the word "Corporate Seal", and 
shall affix an adhesive seal if executed in Maine, New Hampshire, or any other 
jurisdiction requiring adhesive seals.

5.  Type the name and title of each person signing this bond in the space 
provided.

- -------------------------------------------------------------------------------
<PAGE>
 
[LOGO]             [LETTERHEAD OF DEPARTMENT OF THE ARMY APPEARS HERE]

                                 MAY 12, 1997

     REPLY TO:
     ATTENTION OF:

Office of the Chief
Procurement Branch

SUBJECT: Contract No. DACW09-97-C-0035


Pier 400 Constructors
2122 York Road
Oak brook, Illinois 60521

Gentlemen:

     By Executive Order No. 11246, dated 24 September 1965, your contract with 
the Department of the Army contains a provision by which you agree not to 
discriminate against any employee or applicant for employment because of race, 
color, religion, sex or national origin.  Further, you have agreed to insert 
this provision in appropriate subcontracts.

     Your contract requires you to display Posters setting forth the provisions 
of the Equal Opportunity clause.  They should be placed in conspicuous places, 
available to employees and applicants for employment; and in a manner that will 
protect them from destruction by elements and other causes.

     Enclosed is an "Equal Employment Opportunity" poster which you have agreed 
to display. Additional copies will be supplied on request for subcontractors who
are subject to these requirements.

     Please do not hesitate to call on us if you have any questions concerning 
your obligations under the Equal Opportunity clause or the display of posters.

               
                                Sincerely,

                                /s/ J. A. Eugino
                                J. A. Eugino
                                Contracting Officer

Enclosure
CF: Project Engineer, Williams Gallegos







<PAGE>
 
                      EQUAL EMPLOYMENT IS THE LAW        


PRIVATE INDUSTRY, STATE, AND LOCAL GOVERNMENT                                   
                                   
Title VII of the Civil Rights Acts of 1964, as amended, prohibits job
discrimination because of race, color, religion, sex or national origin. 

Applicants to and employees of private employers, state/local governments, and
public/private educational institutions are protected. Also covered are
employment agencies, labor unions and apprenticeship programs. Any person who
believes he or she has been discriminated against should contact immediately

The U.S. Equal Employment Opportunity
     Commission (EEOC)
2401 E St., N.W.
Washington, D.C. 20506

or an EEOC District Office, listed in most telephone directories under U.S.
Government.


FEDERAL CONTRACT EMPLOYMENT

Executive Order 11246, as amended, prohibits job discrimination because of race,
color, religion, sex or national origin and requires affirmative action to
ensure ^?????? of opportunity in all aspects of employment.

Section 503 of the Rehabilitation Act of 1973 prohibits job discrimination 
because of handicap and requires affirmative action to employ and advance in 
employment qualified handicapped workers.

Section 402 of the Vietnam Era Veterans' Readjustment Assistance Act of 1974
prohibits job discrimination and requires affirmative action to employ and
advance in employment (1) qualified Vietnam era veterans during the first four
years after their discharge and (2) qualified disabled veterans throughout their
working life if they have a 30 percent or more disability.

Applicants to and employees of any company with a federal government contract or
subcontract are protected. Any person who believes a contractor has violated its
affirmative action obligations, including nondiscrimination, under Executive 
Order 11246, as amended, or under Section 503 of the Rehabilitation Act should 
contact immediately

The Employment Standards Administration
Office of Federal Contract Compliance
     Programs (OFCCP)
Third and Constitution Ave., N.W.
Washington, D.C. 20210 

or an OFCCP regional office, listed in most telephone directories under U.S. 
Government, Department of Labor, Complaints specifically under the veterans' law
should be filed with the Veteran's Employment Service through local offices of 
the state employment service.

All complaints must be filed within 180 days from date of alleged violation.


[LOGO]

U.S. Department of Labor
Employment Standards Administration
Office of Federal Contract Compliance Programs




??????^ DE OPORTUNIDAD EN EL EMPLEO ES LA LEY 

INDUSTRIAS PRIVADAS, GOBIERNOS LOCALES Y ESTATALES
                                             
El Titulo VII de la Ley de Derechos Civiles de 1964, enmendado, prohibe la
discriminacion en el empleo por razon de raza, color, religion, sexo o
nacionalidad de origen.
                                             
La ley protege a los empleados y solicitantes de empleo en empresas privadas,
gobiernos estatales y locales e instituciones educacionales publicas y privadas.
Tambien abarce las agencias de empleo, sindicatos de trabajadores y programas
de aprendizaje, Cualquler persona, tanto hombre como mujer, que crea que has
sido obeto de discriminacion debe escribir inmediatamente a

The U.S. Equal Employment Opportunity
     Commission (EEOC)
2401 E St., N.W.
Washington, D.C. 20506

o a cualquler oficina regional de EEOC, las que se encuentran en las gulas 
telefonicas locales balo el nombre de: U.S. Government.


La Orden Ejectiva Numero 11246, enmendada, prohibe la discriminacion en el 
empleo por razon origon de raza; color; religion; sexo o-naolonalidad de origon
y exige accion positiva para garantizar la iguaidad de oportunidad en todos los
aspectos del empleo.

Las Seccion 503 de la Ley de Rehabilitacion de 1973, prohibe la discriminacion 
en el empleo contra personas que sufran de impedimentos fisicos o mentales y 
exige accion positiva en el empleo y promocion de personas que sufran de 
impedimentos fisicos o mentales, siempre que reunan las condiciones 
indispensables para el desemperio del empleo.

La Seccion 402 de la Ley de 1974 de Asistencia para el Reajuste de los Veteranos
de la Era de Vietnam, prohibe la discriminacion en el empleo y exige accion 
positiva en el empleo y promocion de (1) veteranos de la era de Vietnam, durante
los primeros cuatro anos despues de haber sido separados del servicio activo, 
siempre que reunan las condiciones indispensables para el desempeno del empleo 
(2) ciertos veteranos que tengan un 30 por ciento o mas de impedimentos fisicos 
o mentales mientras puedan trabajar, slempre que reunan las condiciones 
indispensables para el desempeno del empleo.

La ley protege a los solicitantes de empleo y empleados de cualquier compania 
que tenga un contrato o subcontrato con el goblemo federal. Cualquier persona 
que crea que uno de estos contratistas no ha cumplido con sus obligaciones de 
tomar, accion positiva, inciuyendo la de no discriminar, bajo la Orden Ejecutiva
11246, enmendada, o bajo la Seccion 503 de la Ley de Rehabilitacion, debe 
escribir inmediatamente a

The Employment Standards Administration
Office of Federal Contract Compliance
     Programs (OFCCP)
Third and Constitution Ave., N.W.
Washington, D.C. 20210

o a cualquier oficina regional de OFCCP, las que se encuentran en la mayoria de 
las guias telefonicas bajo: U.S. Government; Department of Labor. Las 
reciamaciones especificaments comprendidas bajo la ley de veteranos, deben de 
dirigirse a Veterans' Employment Service por medio de los oficinas locales del 
servicio de empleo de estado.

Todas las roclamaciones deben de ser registradas dentro de los 180 dias 
subsequentes a la fecha del supuesto acto de discriminacion.


<PAGE>
 
                          INSTRUCTIONS TO CONTRACTOR
                                  Relative to
                         Labor Provisions of Contract


These instructions contain a resume of the various provisions of the contract 
relative to labor, together with information for the guidance of the Contractor
in complying therewith.

CONVICT LABOR stipulates against employment of any person undergoing
- -------------
imprisonment at hard labor.

Equal Opportunity Clause requires the Contractor to take affirmative action to 
- ------------------------
employ personnel without regard to their race, creed, color, sex or national 
origin; to state this fact in all soliciations for employment; to send to each 
labor union with which he has an agreement, a notice advising the labor union or
worker's representative of the Contractor's commitments under this Equal 
Opportunity clause; to comply with Executive Order 11246 of 24 September 1965,
as amended; to furnish all information and reports and permit access to his
books; and further provides that, in the event of non-compliance, the contract
may be terminated and also, that the Contractor will include said provisions in
his subcontracts.

Davis-Bacon Act requires the Contractor and his subcontractors to pay all 
- ---------------
mechanics and laborers employed directly upon the site of the work, 
unconditionally and not less often than once a week, and without subsequent 
deduction or rebate on any account (except such payroll) deductions as are
permitted by the Copeland Regulations (29 CFR, Part 3), in accordance with the
wage rates contained in the wage determination decision of the Secretary of
Labor which is included in the contract and made a part thereof; to post at the
site of work in a prominent place where it can be easily seen by the workers, a
copy of such wage determination; to classify or reclassify any class of laborers
or mechanics, including apprentices and trainees not listed in the wage
determination, conformably to the wage determination decision.

CONTRACT WORK HOURS AND SAFETY STANDARDS ACT - OVERTIME COMPENSATION.
- --------------------------------------------------------------------
Under this law no laborer or mechanic, including apprentices, trainees, watchmen
and guards, shall be required or permitted to work more than eight (8) hours per
day in any calendar day or in excess of forty (40) hours in any workweek in 
which he is employed on any work under this contract except upon the condition
that compensation is paid to such laborer or mechanic for all hours worked in 
excess of eight (8) hours per day or in excess of forty (40) hours per week at 
not less than one and one-half times the basic rates of pay.  In the event of 
any



<PAGE>
 
violation of the provisions of this clause, the Contractor shall be liable to 
any affected employee for any amounts due and to the United States for 
liquidated damages.

Apprentices and Trainees shall be employed only when they are registered as 
- ------------------------
such. The Contractor shall furnish written evidence of the registration under a 
bona fide apprenticeship or trainee program.

PAYROLLS AND BASIC RECORDS. Payrolls and basic records will be maintained during
- --------------------------
the course of the work and shall be preserved for a period of three (3) years
thereafter for all laborers and mechanics, including apprentices, trainees,
watchmen, and guards working at the site of work. All employment records shall
be available for inspection by representatives of the Contracting Officer and
the U.S. Department of Labor, and shall permit such representatives to interview
employees during working hours on the job. The Contractor will be responsible
for timely submission of his own and all subcontractors' weekly payrolls under
the contract.

COMPLIANCE WITH COPELAND REGULATIONS. Rulings and interpretations of the
- ------------------------------------
Secretary of Labor pursuant to said Act as outlined in Section 3 of the Copeland
Act Regulations, set forth permissible deductions. Section 3.6 prescribes the
procedure for making written application for other deduction required by
compelling circumstances. Permissible deductions are set forth in the
instructions accompanying the Sample Payroll furnished herewith. The application
must be made prior to making said deductions and is applicable only to the
contract under which the request is made.

WITHHOLDING OF FUNDS. This clause provides that the Contracting Officer may 
- --------------------
withhold from the payment due the Contractor such amounts as may be necessary to
pay laborers and mechanics, including apprentices, trainees, watchmen, and 
guards, employed by the Contractor or any subcontractor the full amount of wages
as required by the Contract; and to pay liquidated damages under the clause 
"Contract Work Hours and Safety Standards Act - Overtime Compensation."

SUBCONTRACTS provides that the foregoing clauses, and the clause CONTRACT 
- ------------                   -----------------                 --------
TERMINATION - DEBARMENT shall be incorporated into all subcontracts.
- -----------------------

CONTRACT TERMINATION - DEBARMENT provides that breach of the above clauses may 
- --------------------------------
be grounds for debarment.

                                       2
<PAGE>
 
SUBCONTRACTORS requires, within seven (7) days after award of any subcontract 
- --------------
either by the Prime Contractor or a subcontractor, the submission of a statement
signed by the subcontractor, setting forth the name and address of the 
subcontractor, a summary of the work, and acknowledgement of the inclusion of 
labor clauses in the subcontract.

Minority Business Enterprises Subcontracting Program. This clause requires that,
- ----------------------------------------------------
for contracts in excess of $500,000, the Contractor will establish and conduct a
program to enable minority business enterprises to be considered fairly as 
subcontractors and suppliers. The Program will be implemented in accordance 
with paragraph (a)(1-7) of General Provision titled "Minority Business 
Enterprises Subcontracting Program." 

Local Affirmative Action Plan - This clause set forth the requirements that 
- -----------------------------
contractors and subcontractors include in all construction and subcontracts in 
excess of $10,000, the Provision of Clause 74 and any manpower utilization goals
which may be applicable under the contract.

THE CONTRACT PROVISIONS AND INSTRUCTION CONTAINED HEREIN ARE APPLICABLE TO ALL 
SUBCONTRACTORS EMPLOYING LABORERS AND MECHANICS, INCLUDING APPRENTICES, 
TRAINEES, WATCHMEN, AND GUARDS DIRECTLY UPON THE SITE OF THE WORK. ADDITIONAL 
COPIES OF THESE INSTRUCTIONS FOR USE OF SUCH SUBCONTRACTORS MAY BE OBTAINED ON 
REQUEST TO THE CONTRACT SECTION OF THE PROCUREMENT AND SUPPLY DIVISION, LOS 
ANGELES DISTRICT, CORPS OF ENGINEERS.

                                       3

<PAGE>
 
                                 EXHIBIT 21.01

                        Subsidiaries of the Registrant
                        ------------------------------


<TABLE> 
<CAPTION> 
                                             Jurisdiction
         Name                         of Incorporation Organization    Ownership
         ----                         -----------------------------    ---------
<S>                                   <C>                              <C> 
Great Lakes Dredge & Dock Company             New Jersey                 100%

Great Lakes International, Ind.               Delaware                   100%

Dawson Dredging Company                       Delaware                   100%

Gates Construction Corp.                      New Jersey                 100%

Fifty-Three Dredging Corporation              New Jersey                 100%

Amboy Aggregates (A JOINT VENTURE)            New Jersey                  50%

NATCO Limited Partnership                     Delaware                    75%

North American Trailing Company               Delaware                    80%
</TABLE> 


<PAGE>
 
================================================================================

                                   FORM T-1

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                           STATEMENT OF ELIGIBILITY
                  UNDER THE TRUST INDENTURE ACT OF 1939 OF A
                   CORPORATION DESIGNATED TO ACT AS TRUSTEE

                     CHECK IF AN APPLICATION TO DETERMINE
                     ELIGIBILITY OF A TRUSTEE PURSUANT TO
                       SECTION 305(b)(2)           |__|

                            ----------------------

                              THE BANK OF NEW YORK
              (Exact name of trustee as specified in its charter)

New York                                              13-5160382
(State of incorporation                               (I.R.S. employer
if not a U.S. national bank)                          identification no.)

One Wall Street, New York, N.Y.                       10286
(Address of principal executive offices)              (Zip code)

                             ----------------------

                     GREAT LAKES DREDGE & DOCK CORPORATION
              (Exact name of obligor as specified in its charter)

Delaware                                              13-3634726
(State or other jurisdiction of                       (I.R.S. employer
incorporation or organization)                        identification no.)

                        Table of Additional Registrants
                        -------------------------------
<TABLE>
<CAPTION>
 
<S>                                      <C>                <C>
Great Lakes Dredge                       New Jersey         36-1163930
 & Dock Company
Great Lakes International, Inc.          Delaware           36-3015839
Dawson Dredging Company                  Delaware           36-3503893
Gates Construction Corp.                 New Jersey         22-1539854
Fifty-Three Dredging                     New Jersey         36-3177787
 Corporation
</TABLE>


2122 York Road
Oak Brook, Illinois                                   60521
(Address of principal executive offices)              (Zip code)

                             ______________________

              Series B 11-1/4% Senior Subordinated Notes due 2008
                      (Title of the indenture securities)

================================================================================
<PAGE>
 
1.   General information.  Furnish the following information as to the Trustee:

     (a) Name and address of each examining or supervising authority to which it
         is subject.

<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------
             Name                                        Address
- ---------------------------------------------------------------------------------
   <S>                                        <C>        
 
   Superintendent of Banks of the State of    2 Rector Street, New York,
   New York                                   N.Y.  10006, and Albany, N.Y. 12203
 
   Federal Reserve Bank of New York           33 Liberty Plaza, New York,
                                              N.Y.  10045
 
   Federal Deposit Insurance Corporation      Washington, D.C.  20429
 
   New York Clearing House Association        New York, New York  10005
</TABLE>

     (b) Whether it is authorized to exercise corporate trust powers.

     Yes.

2.   Affiliations with Obligor.

     If the obligor is an affiliate of the trustee, describe each such
     affiliation.

     None.

16.  List of Exhibits.

     Exhibits identified in parentheses below, on file with the Commission, are
     incorporated herein by reference as an exhibit hereto, pursuant to Rule 7a-
     29 under the Trust Indenture Act of 1939 (the "Act") and 17 C.F.R.
     229.10(d).

     1. A copy of the Organization Certificate of The Bank of New York (formerly
        Irving Trust Company) as now in effect, which contains the authority to
        commence business and a grant of powers to exercise corporate trust
        powers. (Exhibit 1 to Amendment No. 1 to Form T-1 filed with
        Registration Statement No. 33-6215, Exhibits 1a and 1b to Form T-1 filed
        with Registration Statement No. 33-21672 and Exhibit 1 to Form T-1 filed
        with Registration Statement No. 33-29637.)

     4. A copy of the existing By-laws of the Trustee.  (Exhibit 4 to Form T-1
        filed with Registration Statement No. 33-31019.)

                                      -2-
<PAGE>
 
     6. The consent of the Trustee required by Section 321(b) of the Act.
        (Exhibit 6 to Form T-1 filed with Registration Statement No. 33-44051.)

     7. A copy of the latest report of condition of the Trustee published
        pursuant to law or to the requirements of its supervising or examining
        authority.

                                      -3-
<PAGE>
 
                                   SIGNATURE



   Pursuant to the requirements of the Act, the Trustee, The Bank of New York, a
corporation organized and existing under the laws of the State of New York, has
duly caused this statement of eligibility to be signed on its behalf by the
undersigned, thereunto duly authorized, all in The City of New York, and State
of New York, on the 25th day of September, 1998.


                                       THE BANK OF NEW YORK



                                       By:     /s/ MARY BETH A. LEWICKI
                                           -------------------------------
                                           Name:  MARY BETH A. LEWICKI
                                           Title: ASSISTANT VICE PRESIDENT

                                      -4-
<PAGE>
 
                                 Exhibit 7

- --------------------------------------------------------------------------------

                      Consolidated Report of Condition of

                              THE BANK OF NEW YORK

                    of 48 Wall Street, New York, N.Y. 10286
                     And Foreign and Domestic Subsidiaries,

a member of the Federal Reserve System, at the close of business March 31, 1998,
published in accordance with a call made by the Federal Reserve Bank of this
District pursuant to the provisions of the Federal Reserve Act.
<TABLE>
<CAPTION>
 
                                          Dollar Amounts
ASSETS                                     in Thousands
<S>                                       <C>
Cash and balances due from depos-
  itory institutions:
  Noninterest-bearing balances and
   currency and coin....................     $ 6,397,993
  Interest-bearing balances.............       1,138,362
Securities:
  Held-to-maturity securities...........       1,062,074
  Available-for-sale securities.........       4,167,240
Federal funds sold and Securities pur-
  chased under agreements to resell.....         391,650
Loans and lease financing
  receivables:
  Loans and leases, net of unearned
    income ...................36,538,242
  LESS: Allowance for loan and
    lease losses ................631,725
  LESS: Allocated transfer risk
    reserve............................0
  Loans and leases, net of unearned
    income, allowance, and reserve......      35,906,517
Assets held in trading accounts.........       2,145,149
Premises and fixed assets (including
  capitalized leases)...................         663,928
Other real estate owned.................          10,895
Investments in unconsolidated
  subsidiaries and associated
  companies.............................         237,991
Customers' liability to this bank on
  acceptances outstanding...............         992,747
Intangible assets.......................       1,072,517
Other assets............................       1,643,173
                                             -----------
Total assets............................     $55,830,236
                                             ===========
 
LIABILITIES
Deposits:
  In domestic offices...................     $24,849,054
  Noninterest-bearing ........10,011,422
  Interest-bearing ...........14,837,632
  In foreign offices, Edge and
  Agreement subsidiaries, and IBFs......      15,319,002
  Noninterest-bearing ...........707,820
  Interest-bearing ...........14,611,182
Federal funds purchased and Securities
  sold under agreements to repurchase...       1,906,066
Demand notes issued to the U.S.
  Treasury..............................         215,985
Trading liabilities.....................       1,591,288
Other borrowed money:
  With remaining maturity of one year
    or less.............................       1,991,119
  With remaining maturity of more than
    one year through three years........               0
  With remaining maturity of more than
    three years.........................          25,574
Bank's liability on acceptances exe-
  cuted and outstanding.................         998,145
Subordinated notes and debentures.......       1,314,000
Other liabilities.......................       2,421,281
                                             -----------
Total liabilities.......................      50,631,514
                                             -----------
 
EQUITY CAPITAL
Common stock............................       1,135,284
Surplus.................................         731,319
Undivided profits and capital
  reserves..............................       3,328,050
Net unrealized holding gains
  (losses) on available-for-sale
  securities............................          40,198
Cumulative foreign currency transla-
  tion adjustments......................     (    36,129)
                                             -----------
Total equity capital....................       5,198,722
                                             -----------
Total liabilities and equity capital ...     $55,830,236
                                             ===========
</TABLE> 

   I, Robert E. Keilman, Senior Vice President and Comptroller of the above-
named bank do hereby declare that this Report of Condition has been prepared in
conformance with the instructions issued by the Board of Governors of the
Federal Reserve System and is true to the best of my knowledge and belief.

                                                            Robert E. Keilman

   We, the undersigned directors, attest to the correctness of this Report of
Condition and declare that it has been examined by us and to the best of our
knowledge and belief has been prepared in conformance with the instructions
issued by the Board of Governors of the Federal Reserve System and is true and
correct.

             
   Thomas A. Renyi    | 
   Alan R. Griffith   |    Directors
   J. Carter Bacot    | 
              
- --------------------------------------------------------------------------------

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<CIK>    0000885538
<NAME>   GREAT LAKES DREDGE & DOCK CORP.
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   6-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1997
<PERIOD-START>                             JAN-01-1998             JAN-01-1997
<PERIOD-END>                               JUN-30-1998             DEC-31-1997
<CASH>                                             550                   1,717
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   43,999                  40,749
<ALLOWANCES>                                       482                     450
<INVENTORY>                                      9,626                   9,195
<CURRENT-ASSETS>                                80,319                  91,156
<PP&E>                                         217,960                 212,040
<DEPRECIATION>                                  80,652                  73,324
<TOTAL-ASSETS>                                 234,907                 245,555
<CURRENT-LIABILITIES>                           41,134                  49,594
<BONDS>                                              0                       0
                                0                       0
                                          0                       0
<COMMON>                                        60,000                  60,000
<OTHER-SE>                                      22,867                  18,156
<TOTAL-LIABILITY-AND-EQUITY>                   234,907                 245,555
<SALES>                                              0                       0
<TOTAL-REVENUES>                               127,017                 258,296
<CGS>                                                0                       0
<TOTAL-COSTS>                                  105,933                 228,383
<OTHER-EXPENSES>                                 9,920                  18,922
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                               2,195                   6,303
<INCOME-PRETAX>                                  9,455                   8,136
<INCOME-TAX>                                     3,411                   2,667
<INCOME-CONTINUING>                              4,710                   3,802
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     4,710                   3,802
<EPS-PRIMARY>                                        0                       0
<EPS-DILUTED>                                        0                       0
        

</TABLE>


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