PLAINS RESOURCES INC
S-4, 1997-08-15
PETROLEUM & PETROLEUM PRODUCTS (NO BULK STATIONS)
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<PAGE>
 
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 15, 1997
                                                     Registration No. 333-
================================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                                  ----------

                                    FORM S-4
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                                  ----------

                             PLAINS RESOURCES INC.
            (Exact name of registrant as specified in its charter)
                   SEE TABLE OF ADDITIONAL REGISTRANTS BELOW


          DELAWARE                         1311                  13-2898764
(State or other jurisdiction of      Primary Industrial       (I.R.S. Employer 
incorporation or organization)   Classification Code Number  Identification No.)


                               1600 SMITH STREET
                             HOUSTON, TEXAS 77002
                                (713) 654-1414
   (Address, including zip code, and telephone number, including area code, 
                 of registrant's principal executive offices)

                                  ----------

                             MICHAEL R. PATTERSON
                      VICE PRESIDENT AND GENERAL COUNSEL
                             PLAINS RESOURCES INC.
                               1600 SMITH STREET
                             HOUSTON, TEXAS 77002
                                (713) 654-1414
          (Name, address, including zip code, and telephone number, 
                  including area code, of agent for service)

                                  ----------

                                   COPY TO:
                                JOHN A. WATSON
                          FULBRIGHT & JAWORSKI L.L.P.
                           1301 MCKINNEY, SUITE 5100
                           HOUSTON, TEXAS 77010-3095
                                (713) 651-5151

                                  ----------

APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:  As soon as
practicable after the effective date of this Registration Statement.

If 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, please check the following box: [ ]

                                  ----------

                        CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
=======================================================================================================
                                                               PROPOSED       PROPOSED                  
                                                               MAXIMUM        MAXIMUM                   
                                                               OFFERING       AGGREGATE      AMOUNT OF  
  TITLE OF EACH CLASS OF                        AMOUNT TO       PRICE         OFFERING     REGISTRATION 
SECURITIES TO BE REGISTERED                   BE REGISTERED   PER NOTE(1)     PRICE(1)         FEE       
- -------------------------------------------------------------------------------------------------------
<S>                             <C>             <C>             <C>          <C>
10 1/4% Senior Subordinated Notes due 2006,         
Series D....................................  $ 50,000,000    106.25%       $ 53,125,000    $  16,098  
- ------------------------------------------------------------------------------------------------------- 
Subsidiary Guarantees of 10 1/4% Senior                   
Subordinated Notes due 2006, Series D.......       --                            --              (2) 
- ------------------------------------------------------------------------------------------------------- 
Total.......................................  $ 50,000,000    106.25%       $ 53,125,000    $  16,098
=======================================================================================================
</TABLE>

(1)  Pursuant to Rule 457(f) under the Securities Act of 1933, the registration
     fee has been calculated based on the average of the bid and asked prices in
     the PORTAL market on August 13, 1997, of the 10 1/4% Senior Subordinated
     Notes due 2006, Series C of the Company, for which the securities
     registered hereby will be exchanged.
(2)  Pursuant to Rule 457(n) under the Securities Act of 1933, 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 THAT SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION, ACTING
PURSUANT TO SAID SECTION 8(a), MAY DETERMINE.
================================================================================
<PAGE>
 
                        TABLE OF ADDITIONAL REGISTRANTS
<TABLE> 
<CAPTION> 

=============================================================================================================
                                                                                         ADDRESS, INCLUDING   
                                                                                            ZIP CODE, AND     
                                                                                          TELEPHONE NUMBER    
                                                                                           INCLUDING AREA     
                                                 PRIMARY STANDARD                              CODE OF        
                             STATE OR OTHER         INDUSTRIAL                               REGISTRANT'S     
                             JURISDICTION OF    CLASSIFICATION CODE    IRS EMPLOYER ID    PRINCIPAL EXECUTIVE  
      NAME                   INCORPORATION             NO.                   NO.               OFFICES         
- -------------------------------------------------------------------------------------------------------------
<S>                          <C>                 <C>                   <C>                <C>  
Calumet Florida, Inc.          Delaware               1311               35-1880416               *
- -------------------------------------------------------------------------------------------------------------
Plains Illinois Inc.           Delaware               1311               76-0487569               *
- -------------------------------------------------------------------------------------------------------------
Plains Marketing &             
Transportation Inc.            Delaware               1311               76-0339476               *
- -------------------------------------------------------------------------------------------------------------
Plains Resources               
International Inc.             Delaware               1311               76-0040974               *
- -------------------------------------------------------------------------------------------------------------
PMCT Inc.                      Delaware               1311               76-0410281               *
- -------------------------------------------------------------------------------------------------------------
PLX Crude Lines Inc.           Delaware               1311               76-0387477               *
- -------------------------------------------------------------------------------------------------------------
PLX Ingleside Inc.             Delaware               1311               76-0493777               *
- -------------------------------------------------------------------------------------------------------------
Stocker Resources, Inc.        California             1311               33-0421175               *
- -------------------------------------------------------------------------------------------------------------
Plains Terminal &                                                                                   
Transfer Corporation           Delaware               1311               76-0376679               * 
- -------------------------------------------------------------------------------------------------------------
Stocker Resources, L.P.        California             1311               33-0430755               * 
=============================================================================================================
</TABLE>

* 1600 Smith Street, Houston, Texas 77002, telephone (713) 654-1414.
<PAGE>
 
                             PLAINS RESOURCES INC.

                             Cross-Reference Sheet
          (Pursuant to Rule 404(a) and Item 501(b) of Regulation S-K)
<TABLE> 
<CAPTION> 


          FORM S-4 ITEM AND CAPTION                                     LOCATION OR PROSPECTUS CAPTION
          -------------------------                                     ------------------------------ 
<S>                                                                     <C> 
1.  Forepart of Registration Statement and Outside                      Outside Front Cover Page       
    Front Cover Page of Prospectus

2.  Inside Front and Outside Back Cover Pages of                        Inside Front Cover Page
    Prospectus

3.  Risk Factors, Ratio of Earnings to Fixed Charges                    Prospectus Summary; Risk Factors 
    and Other Information

4.  Terms of the Transaction                                            Prospectus Summary; The Exchange Offer;
                                                                        Description of the Exchange Notes; Certain
                                                                        Federal Income Tax Consequences

5.  Pro Forma Financial Information                                     Incorporation of Certain Documents

6.  Material Contacts with the Company Being Acquired                   Not Applicable

7.  Additional Information Required for Reoffering by                   Not Applicable
    Persons and Parties Deemed to be Underwriters

8.  Interests of Named Experts and Counsel                              Legal Matters; Experts

9.  Disclosure of Commission Position on                                Not Applicable
    Indemnification for Securities Act Liabilities

10. Information with Respect to S-3 Registrants                         Prospectus Summary; Risk Factors; Description
                                                                        of Certain Indebtedness

11. Incorporation of Certain Information by Reference                   Incorporation of Certain Documents

12.  Information with Respect to S-2 or S-3 Registrants                 Not Applicable

13. Incorporation of Certain Information by Reference                   Not Applicable

14. Information with Respect to Registrants Other                       Not Applicable
    Than S-3 or S-2 Registrants

15. Information with Respect to S-3 Companies                           Not Applicable

16. Information with Respect to S-2 or S-3 Companies                    Not Applicable

17. Information with Respect to Companies Other                         Not Applicable
    Than S-3 or S-2 Companies

18. Information if Proxies, Consents or Authorizations                  Not Applicable
    are to be Solicited

19. Information if Proxies, Consents or Authorizations                  Incorporation of Certain Documents
    are not to be Solicited or in an Exchange Offer
</TABLE> 
<PAGE>
********************************************************************************
* INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A        *
* REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE  *
* SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY *
* OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT       *
* BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AND OFFER TO SELL OR *
* THE SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE     *
* SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE   *
* UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF *
* ANY STATE.                                                                   *
********************************************************************************

                 SUBJECT TO COMPLETION, DATED AUGUST 15, 1997

<TABLE> 
<CAPTION> 
<S>                                                     <C> 
PROSPECTUS
                                                         OFFER TO EXCHANGE

                                                          ALL OUTSTANDING

                                        10 1/4 SENIOR SUBORDINATED NOTES DUE 2006, SERIES C
                                            ($50,000,000 PRINCIPAL AMOUNT OUTSTANDING)
                                                                FOR
                                        10 1/4 SENIOR SUBORDINATED NOTES DUE 2006, SERIES D
                                                  ($50,000,000 PRINCIPAL AMOUNT)
                                                                OF

                                              [LOGO OF PLAINS RESOURCES APPEARS HERE]

                                                  UNCONDITIONALLY GUARANTEED BY: 
                                                PLAINS RESOURCES INTERNATIONAL INC.
        CALUMET FLORIDA, INC.                                PMCT INC.                          STOCKER RESOURCES, INC.
        PLAINS ILLINOIS INC.                           PLX CRUDE LINES INC.             PLAINS TERMINAL & TRANSFER CORPORATION
PLAINS MARKETING & TRANSPORTATION INC.                  PLX INGLESIDE INC.                      STOCKEER RESOURCES, L.P.

                                                       ____________________

               THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M ., NEW YORK CITY TIME, ON ________, 1997, UNLESS EXTENDED.

                                                       ____________________

     Plains Resources Inc., a Delaware corporation (the "Company"), hereby offers (the "Exchange Offer"), upon the terms and subject
to the conditions set forth in this Prospectus and the accompanying Letter of Transmittal (the "Letter of Transmittal"), to exchange
up to an aggregate principal amount of $50,000,000 of its Senior Subordinated Notes due 2006, Series D (the "Exchange Notes") for an
equal principal amount of its outstanding 10 1/4% Senior Subordinated Notes due 2006, Series C (the "Outstanding Notes"), in
integral multiples of $1,000. The Exchange Notes will be senior unsecured obligations of the Company and are substantially identical
(including principal amount, interest rate, maturity and redemption rights) to the Outstanding Notes for which they may be exchanged
pursuant to this offer, except for certain transfer restrictions and registration rights relating to the Outstanding Notes and
except for certain interest provisions relating to such rights. The Outstanding Notes have been, and the Exchange Notes will be,
issued under an Indenture dated as of July 21, 1997 (the "Indenture"), among the Company, the Subsidiary Guarantors and Texas
Commerce Bank National Association, as trustee (the "Trustee"). See "Description of Exchange Notes". There will be no proceeds to
the Company from this offering; however, pursuant to a Registration Rights Agreement dated as of July 23, 1997 (the "Registration
Rights Agreement") among the Company, the Subsidiary Guarantors (as defined) and the Initial Purchaser (as defined) of the
Outstanding Notes, the Company will bear certain offering expenses.
                                                                                                 (Cover text continued on next page)


                                                       ____________________

     SEE "RISK FACTORS" ON PAGE 15 FOR A DISCUSSION OF CERTAIN FACTORS TO BE CONSIDERED BY HOLDERS WHO TENDER OUTSTANDING NOTES IN
THE EXCHANGE OFFER.

                                                       ____________________

                                     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 AUGUST   , 1997
</TABLE> 
<PAGE>
 
     The Company will accept for exchange any and all validly tendered
Outstanding Notes on or prior to 5:00 p.m., New York City time, on
______________, 1997, [30 business days after effective date] unless extended
(the "Expiration Date"). Tenders of Outstanding Notes may be withdrawn at any
time prior to 5:00 p.m., New York City time, on the Expiration Date; otherwise
such tenders are irrevocable. Texas Commerce Bank National Association is acting
as Exchange Agent in connection with the Exchange Offer. The Exchange Offer is
not conditioned upon any minimum principal amount of Outstanding Notes being
tendered for exchange, but is otherwise subject to certain customary conditions.

     The Exchange Notes will bear interest from the date of issuance (or the
most recent Interest Payment Date (as defined) to which interest on such
Exchange Notes has been paid), at a rate equal to 10 1/4% per annum and on the
same terms as the Outstanding Notes.  Interest on the Exchange Notes will be
payable semiannually on March 15 and September 15 of each year commencing
September 15, 1997.  Accrued interest on the Outstanding Notes that are tendered
in exchange for the Exchange Notes will be payable on or before September 15,
1997.  Outstanding Notes that are accepted for exchange will cease to accrue
interest on and after the date on which interest on the Exchange Notes will
begin to accrue.

     The Company's obligation to pay the principal of, premium, if any, and
interest on the Exchange Notes will be unconditionally guaranteed, on a joint
and several basis, by the following subsidiaries of the Company: Calumet
Florida, Inc., Plains Illinois Inc., Plains Marketing & Transportation Inc.,
Plains Resources International Inc., PMCT Inc., PLX Crude Lines Inc., PLX
Ingleside Inc., Stocker Resources, Inc., Plains Terminal & Transfer Corporation,
and Stocker Resources, L.P. (the "Subsidiary Guarantors").

     The Outstanding Notes were sold by the Company on July 23, 1997 to the
Initial Purchaser in transactions not registered under the Securities Act in
reliance upon the exemption provided in Section 4(2) of the Securities Act.  The
Initial Purchaser subsequently placed the Outstanding Notes with qualified
institutional buyers in reliance upon Rule 144A under the Securities Act.
Accordingly, the Outstanding Notes may not be reoffered, resold or otherwise
transferred in the United States unless so registered or unless an applicable
exemption from the registration requirements of the Securities Act is available.
The Exchange Notes are being offered hereunder in order to satisfy the
obligations of the Company under the Registration Rights Agreement.  See "The
Exchange Offer".

     Based on an interpretation by the staff of the Securities and Exchange
Commission (the "Commission") set forth in no-action letters issued to third
parties, the Company believes that Exchange Notes issued pursuant to this
Exchange Offer may be offered for resale, resold and otherwise transferred by a
holder who is not an affiliate of the Company without compliance with the
registration and prospectus delivery provisions of the Securities Act, provided
that the holder is acquiring the Exchange Notes in its ordinary course of
business and is not participating in and has no arrangement or understanding
with any person to participate in the distribution (within the meaning of the
Securities Act) of the Exchange Notes.  Persons wishing to exchange Outstanding
Notes in the Exchange Offer must represent to the Company that such conditions
have been met.

     Each broker-dealer that receives Exchange Notes for its own account
pursuant to the Exchange Offer (a "Participating Broker-Dealer") must
acknowledge that it will deliver a prospectus in connection with any resale of
Exchange Notes.  A broker-dealer that delivers such a prospectus to purchasers
in connection with such resales will be subject to certain of the civil
liability provisions under the Securities Act and will be bound by the
provisions of the Registration Rights Agreement (including certain
indemnification rights and obligations).  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 Outstanding Notes where
such Outstanding Notes were acquired by such broker-dealer as a result of
market-making activities or other trading activities.  The Company has agreed
that, if requested by a Participating Broker-Dealer, it will use its best
efforts to make this Prospectus available to any Participating Broker-Dealer for
use in connection with any such resale for a period of up to six months or such
earlier date as such Participating Broker-Dealer shall have notified the Company
in writing that such Participating Broker-Dealer has resold all Exchange Notes
acquired in the Exchange Offer.  See "Plan of Distribution".

     The Company does not intend to list the Exchange Notes on any national
securities exchange or to seek the admission thereof to trading in the National
Association of Securities Dealers Automated Quotation System.  

                                       2
<PAGE>
 
The Initial Purchaser has advised the Company that they intend to make a market
in the Exchange Notes; however, they are not obligated to do so and any market-
making may be discontinued at any time without notice. Accordingly, no assurance
can be given that an active public or other market will develop for the Exchange
Notes or as to the liquidity of or the trading market for the Exchange Notes.

     Any Outstanding Notes not tendered and accepted in the Exchange Offer will
remain outstanding.  To the extent that any Outstanding Notes are tendered and
accepted in the Exchange Offer, a holder's ability to sell untendered
Outstanding Notes could be adversely affected.  Following consummation of the
Exchange Offer, the holders of Outstanding Notes will continue to be subject to
the existing restrictions upon transfer thereof.

     The Company expects that the Exchange Notes issued pursuant to this
Exchange Offer will be issued in the form of a Global Exchange Notes (as defined
herein), which will be deposited with, or on behalf of, The Depository Trust
Company (the "Depositary") and registered in its name or in the name of Cede &
Co., its nominee.  Beneficial interests in the Global Exchange Notes
representing the Exchange Notes will be shown on, and transfers thereof to
qualified institutional buyers will be effected through, records maintained by
the Depositary and its participants.  After the initial issuance of the Global
Exchange Notes, Exchange Notes in certificated form will be issued in exchange
for the Global Exchange Notes on the terms set forth in the Indenture.  See
"Description of Exchange Notes--Book Entry; Delivery and Form".

                             ____________________

     No dealer, salesperson or other person has been authorized to give
information or to make any representations not contained in this Prospectus,
and, if given or made, such information or representations must not be relied
upon as having been authorized by the Company.  This Prospectus does not
constitute an offer to sell or the solicitation of an offer to buy any security
other than the Exchange Notes offered hereby, nor does it constitute an offer to
sell or the solicitation of an offer to buy any of the Exchange Notes to any
person in any jurisdiction in which it is unlawful to make such an offer or
solicitation to such person.  Neither the delivery of this Prospectus nor any
sale made hereunder shall under any circumstances create any implication that
the information contained herein is correct as of any date subsequent to the
date hereof.

     UNTIL ________, 1997 (90 DAYS AFTER COMMENCEMENT OF THIS OFFERING), ALL
DEALERS EFFECTING TRANSACTIONS IN THE EXCHANGE NOTES, WHETHER OR NOT
PARTICIPATING IN THE EXCHANGE OFFER, MAY BE REQUIRED TO DELIVER A PROSPECTUS.

                               TABLE OF CONTENTS

                                 PAGE                                       PAGE
                                 ----                                       ----
                                             
Available Information...........   3     Use of Proceeds...................   27
Incorporation of Certain                 Description of Certain              
 Documents......................   4      Indebtedness......................  29
Prospectus Summary..............   6     Description of the Exchange Notes..  31
Risk Factors....................  15     Plan of Distribution...............  60
The Exchange Offer..............  20     Legal Matters......................  61
Certain Federal Income                   Experts............................  61
 Tax Consequences...............  27


                             AVAILABLE INFORMATION

     The Company has filed with the Commission in Washington, D.C., a
Registration Statement on Form S-4 (the "Registration Statement") under the
Securities Act of 1933, as amended (the "Securities Act"), with respect to the
securities offered by this Prospectus.  Certain of the information contained in
the Registration Statement is omitted from this Prospectus, and reference is
hereby made to the Registration Statement and exhibits and schedules relating
thereto for further information with respect to the Company and the securities
offered by this Prospectus.  The Company is subject to the informational
requirements of the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), and, in accordance therewith, files reports, proxy statements and other
information with the Commission.  Such reports, proxy statements and other
information are available for inspection at, and copies of such materials may be
obtained upon payment of the fees prescribed therefor by the rules and
regulations of the 

                                       3
<PAGE>
 
Commission from, the Commission at its principal offices located at Judiciary
Plaza, 450 Fifth Street, N.W., Room 1024, Washington, D.C. 20549, and the
Regional Offices of the Commission located at 500 West Madison Street, Suite
1400, Chicago, Illinois 60661-2511 and at 7 World Trade Center, New York, New
York 10048. In addition, such materials filed electronically by the Company with
the Commission are available at the Commission's World Wide Web site at
http://www.sec.gov. The Common Stock is traded on the American Stock Exchange,
and such reports, proxy statements and other information may be inspected at the
offices of the American Stock Exchange, Inc., 86 Trinity Place, New York, New
York 10005.

     So long as the Company is subject to the periodic reporting requirements of
the Exchange Act, it is required to furnish the information required to be filed
with the Commission to the Trustee and the holders of the Outstanding Notes and
the Exchange Notes.  The Company has agreed that, even if it is entitled under
the Exchange Act not to furnish such information to the Commission, it will
nonetheless continue to furnish information that would be required to be
furnished by the Company by Section 13 of the Exchange Act to the Trustee and
the holders of the Outstanding Notes or Exchange Notes as if it were subject to
such periodic reporting requirements.

     In addition, the Company has agreed that for so long as any of the Notes
are outstanding and are "restricted securities" within the meaning of Rule
144(a)(3) under the Securities Act, it will make available to any prospective
purchaser of the Notes or beneficial owner of the Notes in connection with any
sale thereof the information required by Rule 144A(d)(4) under the Securities
Act until such time as the Company has either exchanged the Outstanding Notes
for the Exchange Notes or until such time as the holders thereof have disposed
of such Outstanding Notes pursuant to an effective registration statement filed
by the Company.

                      INCORPORATION OF CERTAIN DOCUMENTS

     The Company's Annual Report on Form 10-K for the fiscal year ended December
31, 1996, and the Company's Quarterly Reports on Form 10-Q for the three months
ended March 31, 1997, and June 30, 1997, respectively, are hereby incorporated
herein by reference.

     All documents filed by the Company pursuant to Section 13(a), 13(c), 14 or
15(d) of the Exchange Act, after the date of this Prospectus and prior to the
termination of the Registration Statement of which this Prospectus is a part
with respect to registration of the Exchange Notes, shall be deemed to be
incorporated by reference in this Prospectus and be a part hereof from the date
of filing of such documents.  Any statement contained in a document incorporated
or deemed to be incorporated by reference in this Prospectus shall be deemed to
be modified or superseded for purposes of this Prospectus to the extent that a
statement contained in this Prospectus, or in any other subsequently filed
document that also is or is deemed to be incorporated by reference, modifies or
replaces such statement.

     The Company undertakes to provide without charge to each person, including
any beneficial owner, to whom a copy of this Prospectus has been delivered, upon
written or oral request of any such person, a copy of any or all of the
documents incorporated by reference herein, other than exhibits to such
documents, unless such exhibits are specifically incorporated by reference into
the information that this Prospectus incorporates.  Written or oral requests for
such copies should be directed to:  Plains Resources Inc., 1600 Smith Street,
Houston, Texas 77002, Attention: Investor Relations Department, telephone (713)
654-1414.

                              CERTAIN DEFINITIONS

     As used in this Prospectus, "Mcf" means thousand cubic feet, "Bcf" means
billion cubic feet, "Bbl" means barrel, "BOE" means barrel of oil equivalent and
"MCFE" means Mcf of natural gas equivalent. Natural gas equivalents and crude
oil equivalents are determined using the ratio of six Mcf of natural gas to one
barrel of crude oil, condensate or natural gas liquids. "EBITDA" means earnings
before interest, taxes, depreciation, depletion, amortization and other non-cash
items. EBITDA is commonly used by debt holders and financial statement users as
a measure to determine the ability of an entity to meet its interest payment
obligations. EBITDA is not a measure presented in accordance with generally
accepted accounting principles ("GAAP") and is not intended to be used in lieu
of GAAP presentations of results of operations and cash provided by operating
activities. "Present Value of

                                       4
<PAGE>
 
Proved Reserves" means the present value (discounted at 10%) of estimated future
cash flows from proved oil and natural gas reserves reduced by estimated future
operating expenses, development expenditures and abandonment costs (net of
salvage value) associated therewith (before income taxes), calculated using
product prices in effect on the date of determination, and "Standardized
Measure" is such amount further reduced by the present value (discounted at 10%)
of estimated future income taxes on such cash flows. "Notes" includes the
Outstanding Notes, the Exchange Notes and any Private Exchange Notes (as
defined).

                                       5
<PAGE>
 
                              PROSPECTUS SUMMARY

     The following summary is qualified in its entirety by the more detailed
information and financial statements and notes thereto set forth in this
Prospectus.  As used herein, the terms "Company" and "Plains" mean Plains
Resources Inc. and its subsidiaries, except as the context may otherwise
require.

                                  THE COMPANY

     Plains is an independent energy company engaged in the acquisition,
exploitation, development, exploration and production of crude oil and natural
gas and the marketing, transportation, terminalling and storage of crude oil.
The Company's upstream oil and natural gas activities are focused in the Los
Angeles Basin of California (the "LA Basin"), the Sunniland Trend of South
Florida (the "Sunniland Trend"), the Illinois Basin in southern Illinois (the
"Illinois Basin") and the Gulf Coast area of Louisiana.  The Company's
downstream marketing, terminalling and storage activities are concentrated in
Oklahoma, Texas and the Gulf Coast area of Louisiana.  Plains' upstream
operations contributed approximately 90% of the Company's EBITDA for the fiscal
year ending December 31, 1996, while the Company's downstream activities
accounted for the remainder.

     The Company has experienced significant growth over the last five years.
From December 31, 1991, to December 31, 1996, the Company's proved reserve
volumes increased from 14 million BOE to 122 million BOE, its Present Value of
Proved Reserves increased from $72 million to $765 million and its Standardized
Measure increased from $70 million to $579 million.  Over the same period, the
Company has added 136 million BOE of proved reserves at an aggregate average
finding and development cost of $2.24 per BOE ($0.37 per MCFE), replacing
production by approximately 600%.  During 1996, the Company's net production
averaged approximately 17,500 BOE per day and its unit gross profit (gross
margin less upstream general and administrative expenses) averaged $8.44 per BOE
($1.41 per MCFE).  EBITDA increased 580% from $9 million in 1991 to $61 million
(before non-recurring items) in 1996, and cash provided by operating activities
before changes in assets and liabilities increased 670% from $6 million in 1991
to $44 million (before non-recurring items) in 1996.

     The Company's significant increase in proved reserves, production and cash
flow from crude oil and natural gas producing activities is attributable to the
acquisition and subsequent exploitation of its LA Basin, Sunniland Trend and
Illinois Basin properties.  These three core areas are comprised primarily of
crude oil properties with established production histories and collectively
account for approximately 98% of the Company's year-end 1996 proved reserves and
99% of its 1996 production.  The Company believes these properties include a
significant inventory of exploitation and development opportunities, which are
expected to contribute to the Company's anticipated future growth in production
and reserves.  The Company intends to make an aggregate of approximately $95
million in capital expenditures in 1997, including $25 million expended for the
acquisition of the Montebello properties.  The Company operates and owns a 100%
working interest in its major producing fields in each of these areas, which
enables the Company to control the exploitation of such properties.  On a BOE
basis, at December 31, 1996, the Company's proved reserves were approximately
95% crude oil and natural gas liquids, with a proved reserves to production
ratio of approximately 19 years. Approximately 74% of the Company's proved
reserves at December 31, 1996, were classified as proved developed.

     The Company's marketing effort involves purchasing crude oil from other
producers and marketing it to the refining sector.  The Company aggregates these
purchased volumes with its own production at major crude oil interchanges and
trading locations, which enables it to obtain higher prices for its own
production while realizing profits on the production purchased from others.  The
Company owns and operates a two million barrel, above ground crude oil storage
and terminalling facility in Cushing, Oklahoma (the "Cushing Terminal"), the
United States' largest inland crude oil interchange and trading location.  This
facility enhances the ability of the Company to profit from its marketing
activities by allowing the Company to take advantage of certain time and quality
arbitrage opportunities and make or take physical delivery of crude oil at
Cushing, the NYMEX designated delivery location.  The Company's downstream
activities have expanded significantly during the last several years, with
downstream gross margin (revenues less direct expenses of purchases,
transportation, storage and terminalling) having increased approximately 672%
from $1.2 million in 1991 to $9.5 million in 1996.

                                       6
<PAGE>
 
     The Company's upstream and downstream business activities focus on crude
oil as the primary product.  As a result of inefficiencies existing in the crude
oil markets and the U.S. pipeline and transportation infrastructure, management
believes its ability to compete is enhanced by the alternatives afforded by its
proprietary access to the Cushing Terminal.  The Company's crude oil marketing
expertise allows it to obtain higher prices for the Company's existing
production by reducing quality and location pricing differentials.  The Company
believes that such expertise also may provide it with a competitive advantage in
making acquisitions by enabling it to identify potential crude oil price
enhancements for targeted properties.

BUSINESS STRATEGY

     The Company's business strategy is to increase its proved reserves and cash
flow by exploiting and producing oil and natural gas from its existing
properties, acquiring underdeveloped oil properties and exploring for
significant new sources of reserves.  The Company concentrates its exploitation
efforts on mature crude oil producing properties that it believes to be
underdeveloped and that meet the Company's other targeted criteria.  Generally,
such properties were previously owned by major integrated or large independent
oil and natural gas companies, have produced significant volumes since initial
discovery and have significant estimated remaining reserves in place.
Management believes that it has developed a proven record in acquiring and
exploiting underdeveloped crude oil properties where it believes substantial
reserve additions and cash flow increases can be made through improved
production practices and recovery techniques and relatively low risk development
drilling.  An integral component of the Company's exploitation effort is to
increase unit operating margins, and therefore cash flow, by reducing unit
production expenses and increasing wellhead price realizations.  The Company
seeks to complement these exploitation efforts by pursuing certain higher risk
exploration opportunities which offer potentially higher rewards.  In 1996, the
Company formed a joint venture and five year strategic alliance with 3DX
Technologies Inc. ("3DX"), a publicly held company that specializes in the
application of 3-D seismic imaging, to pursue exploration and exploitation
projects that are candidates for the application of 3-D seismic technology.  The
Company also seeks to capitalize on downstream opportunities that exist as a
result of inefficiencies within the crude oil markets and the U.S. pipeline and
transportation infrastructure.  The Company's marketing of its own crude oil
production takes advantage of the marketing expertise attributable to its
downstream activities.  As part of its business strategy, the Company
periodically evaluates, and from time to time has elected to sell, certain of
its mature producing properties that it considers to be nonstrategic or fully
valued.  Such sales enable the Company to focus on its core properties, maintain
financial flexibility, control overhead and redeploy the sales proceeds to
activities that have potentially higher financial returns.

     Consistent with its strategy of exploiting mature, underdeveloped crude oil
properties, the Company's three core properties were all added since mid-1992,
and the Company has sold substantially all of the producing properties that it
owned prior to such time.  Since such time through December 31, 1996, the
Company has expended approximately $185 million of direct capital to acquire and
exploit its three core properties.  For this same period, cumulative operating
cash flow and proceeds from minor property sales from these three core areas
aggregated $156 million.  At December 31, 1996, the estimated remaining future
net revenues and Present Value of Proved Reserves for these properties were $1.6
billion and $750 million, respectively.  The benchmark NYMEX crude oil spot
price ("NYMEX Crude Oil Price") at December 31, 1996, was $25.92 per barrel.
Such price at August 1, 1997, was $20.28 per barrel.

     In order to manage its exposure to commodity price risk, the Company
routinely hedges a portion of its crude oil production.  For the second half of
1997, the Company has entered into various fixed price and floating price collar
arrangements.  Such arrangements generally provide the Company with downside
price protection on approximately 14,000 barrels of oil per day at a NYMEX Crude
Oil Price of approximately $19.25 per barrel, but permit the Company to receive
the benefit of increases in the NYMEX Crude Oil Price up to $24.00 per barrel on
4,000 of such barrels.  Thus, based on the Company's average second quarter 1997
oil production rate, these arrangements generally provide the Company with
downside price protection for 75% of its production and upside price
participation for 46% of its production up to $24.00 per barrel, while 25% of
such production and excess volumes, if any, remain unhedged.  In addition, the
Company also has fixed price arrangements on approximately 12,000 barrels per
day for 1998 at a NYMEX Crude Oil Price of approximately $19.80 per barrel.

                                       7
<PAGE>
 
     Effective February 1, 1997, the Company acquired the Montebello Field from
Chevron USA ("Chevron") for $25 million.  The assets acquired consist of a 100%
working interest and a 99.2% net revenue interest in 55 producing oil wells and
related facilities and also include surface and development rights to
approximately 450 acres (the "Montebello Acquisition").  The Montebello Field,
which is located approximately 15 miles from the Company's existing LA Basin
operations, has produced approximately 108 million barrels of oil and an
estimated 100 Bcf of natural gas since its discovery in 1917.  The Company
intends to focus on improving the unit gross margin of these properties by
decreasing unit production expenses and increasing production volumes through
production enhancement activities similar to those employed in its other LA
Basin properties.  At the acquisition date, the field was producing
approximately 800 barrels of oil and 800 Mcf of gas per day and added
approximately 23 million BOE to the Company's proved reserves.

          The Company was incorporated under the laws of the State of Delaware
in 1976.  The Company's executive offices are located at 1600 Smith Street,
Suite 1500, Houston, Texas  77002, and its telephone number is  (713) 654-1414.

                                       8
<PAGE>
 
                          THE EXCHANGE NOTE OFFERING

The Outstanding Notes......  The Outstanding Notes were sold by the Company on
                             July 23, 1997, to Jefferies & Company, Inc., (the
                             "Initial Purchaser") pursuant to a Purchase
                             Agreement dated July 18, 1997 (the "Purchase
                             Agreement"). The Initial Purchaser subsequently
                             resold the Outstanding Notes to qualified
                             institutional buyers pursuant to Rule 144A under
                             the Securities Act.

Registration Requirements..  Pursuant to the Purchase Agreement, the Company and
                             the Initial Purchaser entered into a Registration
                             Rights Agreement dated July 23, 1997 (the
                             "Registration Rights Agreement"), which grants the
                             holders of the Outstanding Notes certain exchange
                             and registration rights. The Exchange Offer is
                             intended to satisfy such exchange rights, which
                             terminate upon the consummation of the Exchange
                             Offer. If applicable law or applicable
                             interpretations of the staff of the Commission do
                             not permit the Company to effect the Exchange
                             Offer, or in certain other circumstances, the
                             Company has agreed to file a shelf registration
                             (the "Shelf Registration Statement") covering
                             resales of Transfer Restricted Securities (as
                             defined). See "The Exchange Offer--Resale of
                             Exchange Notes".

                              THE EXCHANGE OFFER

Securities Offered.........  $50,000,000 aggregate principal amount of 10 1/4%
                             Senior Notes due 2006, Series D.

The Exchange Offer.........  $1,000 principal amount of the Exchange Notes in
                             exchange for each $1,000 principal amount of
                             Outstanding Notes. As of the date hereof,
                             $50,000,000 aggregate principal amount of
                             Outstanding Notes are outstanding. The Company will
                             issue the Exchange Notes to holders on ________,
                             1997 (the "Exchange Date").

                             Based on an interpretation of the staff of the
                             Commission set forth in no-action letters issued to
                             third parties, the Company believes that Exchange
                             Notes issued pursuant to the Exchange Offer in
                             exchange for Outstanding Notes may be offered for
                             resale, resold and otherwise transferred by any
                             holder thereof (other than any such holder which is
                             an "affiliate" of the Company within the meaning of
                             Rule 405 under the Securities Act) 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 holder's business and that
                             such holder does not intend to participate and has
                             no arrangement or understanding with any person to
                             participate in the distribution of such Exchange
                             Notes.

                             Each Participating Broker-Dealer must acknowledge
                             that it will deliver a prospectus in connection
                             with any resale of Exchange Notes. A broker-dealer
                             that delivers such a prospectus to purchasers in
                             connection with such resales will be subject to
                             certain of the civil liability provisions under the
                             Securities Act and will be bound by the provisions
                             of the Registration Rights Agreement (including
                             certain indemnification rights and obligations).
                             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 Outstanding
                             Notes where such Outstanding Notes were acquired by
                             such broker-dealer as a result of market-making

                                       9
<PAGE>
 
                             activities or other trading activities. The Company
                             has agreed that, if requested by a Participating
                             Broker-Dealer, it will use its best efforts to make
                             this Prospectus available to any Participating
                             Broker-Dealer for use in connection with any such
                             resale for a period of up to six months or such
                             earlier date as such Participating Broker-Dealer
                             shall have notified the Company in writing that
                             such Participating Broker-Dealer has resold all
                             Exchange Notes acquired in the Exchange Offer. See
                             "Plan of Distribution".

                             Any holder who tenders in the Exchange Offer with
                             the intention to participate, or for the purpose of
                             participating, in a distribution of the Exchange
                             Notes could not rely on the position of the staff
                             of the Commission enunciated in Exxon Capital
                             Holdings Corporation (available April 13, 1989) or
                             similar no-action letters and, in the absence of an
                             exemption therefrom, must comply with the
                             registration and prospectus delivery requirements
                             of the Securities Act in connection with the resale
                             transaction. Failure to comply with such
                             requirements in such instance may result in such
                             holder incurring liability under the Securities Act
                             for which the holder is not indemnified by the
                             Company.

Expiration Date............  5:00 p.m., New York City time, on ________, 1997.

Interest on the Notes......  The Exchange Notes will bear interest from the date
                             of issuance of the Exchange Notes. Interest on the
                             Outstanding Notes that are tendered in exchange for
                             the Exchange Notes that has accrued from July 23,
                             1997, the date of issuance of the Outstanding
                             Notes, through the Exchange Date will be payable on
                             or before September 15, 1997.

Procedures for Tendering
  Outstanding Notes........  Each holder of Outstanding Notes wishing to accept
                             the Exchange Offer must complete, sign and date the
                             accompanying 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 the Outstanding Notes and
                             any other required documentation to the Exchange
                             Agreement at the address set forth herein. By
                             executing the Letter of Transmittal, each holder
                             will represent to the Company that, among other
                             things, the holder or the person receiving such
                             Exchange Notes, whether or not such person is the
                             holder, is acquiring the Exchange Notes in the
                             ordinary course of business and that neither the
                             holder nor any such other person has any
                             arrangement or understanding with any person to
                             participate in the distribution of such Exchange
                             Notes. In lieu of physical delivery of the
                             certificates representing Outstanding Notes,
                             tendering holders may transfer notes pursuant to
                             the procedure for book-entry transfer as set forth
                             under "The Exchange Offer--Procedures for
                             Tendering".

Special Procedures for 
  Beneficial Owners........  Any beneficial owner whose Outstanding Notes are
                             registered in the name of a broker-dealer,
                             commercial bank, trust company or other nominee and
                             who wishes to tender should contact such registered
                             holder promptly and instruct such registered holder
                             to tender on such beneficial owner's behalf. If
                             such beneficial owner wishes to tender on such
                             owner's own behalf, such owner must, prior to
                             completing and executing the Letter of Transmittal
                             and 

                                       10
<PAGE>
 
                             delivering its Outstanding Notes, either make
                             appropriate arrangements to register ownership of
                             the Outstanding Notes in such owner's name or
                             obtain a properly completed bond power from the
                             registered holder. The transfer of registered
                             ownership may take considerable time.

Guaranteed Delivery 
  Procedures...............  Holders of Outstanding Notes who wish to tender
                             their Outstanding Notes and whose Outstanding Notes
                             are not immediately available or who cannot deliver
                             their Outstanding Notes, the Letter of Transmittal
                             or any other documents required by the Letter of
                             Transmittal to the Exchange Agent (or comply with
                             the procedures for book-entry transfer) prior to
                             the Expiration Date must tender their Outstanding
                             Notes according to the guaranteed delivery
                             procedures set forth in "The Exchange Offer--
                             Guaranteed Delivery Procedures".

Withdrawal Rights..........  Tenders may be withdrawn at any time prior to 5:00
                             p.m., New York City time, on the Expiration Date
                             pursuant to the procedures described under "The
                             Exchange Offer--Withdrawal of Tenders".

Acceptance of Outstanding 
  Notes and Delivery of 
  Exchange Notes...........  Subject to certain conditions, the Company will
                             accept for exchange any and all Outstanding Notes
                             that are properly tendered in the Exchange Offer
                             prior to 5:00 p.m., New York City time, on the
                             Expiration Date. The Exchange Notes issued pursuant
                             to the Exchange Offer will be delivered on the
                             Exchange Date. See "The Exchange Offer--Terms of
                             the Exchange Offer".

Federal Income Tax
Consequences...............  The exchange pursuant to the Exchange Offer should
                             not be a taxable event for federal income tax
                             purposes. See "Certain Federal Income Tax
                             Consequences".

Private Exchange Notes.....  The Registration Rights Agreement provides that if,
                             prior to consummation of the Exchange Offer, the
                             Initial Purchaser holds any Outstanding Notes
                             acquired by it and having, or which are reasonably
                             likely to be determined to have, the status of an
                             unsold allotment in the initial distribution, or
                             any other holder of Outstanding Notes is not
                             entitled to participate in the Exchange Offer, the
                             Company upon the request of the Initial Purchaser
                             or any such holder shall, simultaneously with the
                             delivery of the Exchange Notes in the Exchange
                             Offer, issue and deliver to the Initial Purchaser
                             and any such holder, in exchange (the "Private
                             Exchange") for such Outstanding Notes held by such
                             Initial Purchaser and any such holder, a like
                             principal amount of debt securities of the Company
                             that are identical in all material respects to the
                             Exchange Notes (the "Private Exchange Notes") (and
                             which were issued pursuant to the same indenture as
                             the Exchange Notes). The Private Exchange Notes are
                             not covered by the registration statement of which
                             this Prospectus is a part and are not being offered
                             hereby. Any Private Exchange Notes will be entitled
                             to all the rights and subject to all the
                             limitations applicable thereto under the Indenture,
                             and will be subject to the same restrictions on
                             transfer applicable to untendered Outstanding
                             Notes. See "The Exchange Offer--Consequences of
                             Failure to Exchange". However, pursuant to the
                             Registration Rights Agreement, holders of Private
                             Exchange Notes have certain rights to require the
                             Company to file and maintain a shelf registration
                             statement that would allow resales of such Private
                             Exchange Notes owned by such holders. See "The
                             Exchange Offer--Shelf Registration Statement".

                                       11
<PAGE>
 
Effect on Holders of
  Outstanding Notes........  As a result of the making of this Exchange Offer,
                             the Company will have fulfilled one of its
                             obligations under the Registration Rights
                             Agreement, and, with certain exceptions noted
                             below, holders of Outstanding Notes who do not
                             tender their Outstanding Notes will not have any
                             further registration rights under the Registration
                             Rights Agreement or otherwise. Such holders will
                             continue to hold the untendered Outstanding Notes
                             and will be entitled to all the rights and subject
                             to all the limitations applicable thereto under the
                             Indenture, except to the extent such rights or
                             limitations, by their terms, terminate or cease to
                             have further effectiveness as a result of the
                             Exchange Offer. All untendered Outstanding Notes
                             will continue to be subject to certain restrictions
                             on transfer. Accordingly, if any Outstanding Notes
                             are tendered and accepted in the Exchange Offer,
                             the trading market of the untendered Outstanding
                             Notes could be adversely affected.

Shelf Registration 
  Statement................  If (i) the Company is not permitted to consummate
                             the Exchange Offer because the Exchange Offer is
                             not permitted by any applicable law or applicable
                             interpretation of the Commission or the staff of
                             the Commission or (ii) any holder of an Outstanding
                             Note notifies the Company on or prior to the
                             Exchange Date that (A) due to a change in law or
                             policy it is not entitled to participate in the
                             Exchange Offer, (B) due to a change in law or
                             policy it may not resell the Exchange Notes
                             acquired by it in the Exchange Offer to the public
                             without delivering a prospectus and this prospectus
                             is not appropriate or available for such resales by
                             such holder or (C) it is a broker-dealer that owns
                             Outstanding Notes (including the initial purchaser
                             that holds Outstanding Notes as part of an unsold
                             allotment from the original offering of the
                             Outstanding Notes) acquired directly from the
                             Company or an affiliate of the Company or (iii) any
                             holder of Private Exchange Notes so requests within
                             120 days after the consummation of the Exchange
                             Offer, the Company has agreed to file and maintain
                             a shelf registration statement that would allow
                             resales of transfer restricted Outstanding Notes,
                             Exchange Notes or Private Exchange Notes owned by
                             such holders.

Exchange Agent.............  Texas Commerce Bank National Association.


                     SUMMARY OF TERMS OF THE EXCHANGE NOTES

Securities Offered.........  $50,000,000 principal amount of 10 1/4% Senior
                             Subordinated Notes due 2006, Series D.

Maturity Date..............  March 15, 2006.

Interest Rate and 
  Payment Dates............  The Exchange Notes will bear interest at a rate of
                             10 1/4% per annum. Interest on the Exchange Notes
                             will accrue from the date of issuance thereof and
                             will be payable semi-annually in cash in arrears on
                             each March 15 and September 15, commencing
                             September 15, 1997.

Optional Redemption........  The Exchange Notes will be redeemable at the option
                             of the Company, in whole or in part, from time to
                             time on or after March 15, 2001, at the redemption
                             prices set forth herein, plus accrued and unpaid
                             interest to the applicable redemption date. In
                             addition, prior to March 15, 1999, $15 million in
                             principal amount of the Exchange Notes are
                             redeemable at

                                       12
<PAGE>
 
                             the option of the Company, in whole or in part,
                             from time to time, at 110 1/4% of the principal
                             amount thereof, with the Net Proceeds (as defined)
                             of any Public Equity Offering (as defined) provided
                             that at least $35 million in aggregate principal
                             amount of Notes remains outstanding immediately
                             after such redemption. See "Description of the
                             Exchange Notes--Redemption and Repurchase".

Change of Control..........  In the event of a Change of Control (as defined)
                             and a corresponding Rating Decline (as defined),
                             the Company will be required to make an offer to
                             repurchase the Exchange Notes at 101% of the
                             principal amount thereof, plus accrued and unpaid
                             interest to the date of repurchase. See
                             "Description of the Exchange Notes--Change of
                             Control".

Certain Covenants..........  The Exchange Notes will be issued under the
                             Indenture, which contains covenants, including but
                             not limited to covenants with respect to the
                             following matters: (i) limitations on incurrence of
                             additional indebtedness; (ii) limitations on
                             certain investments; (iii) limitations on
                             restricted payments; (iv) limitations on
                             disposition of assets; (v) limitation on dividends
                             and other payment restrictions affecting
                             subsidiaries; (vi) limitations on transactions with
                             affiliates; (vii) limitations on liens; and (viii)
                             restrictions on mergers, consolidations and
                             transfers of assets. See "Description of the
                             Exchange Notes--Certain Covenants".

Ranking....................  The Exchange Notes will be unsecured senior
                             subordinated obligations of the Company and will be
                             subordinated in right of payment to all existing
                             and future Senior Indebtedness of the Company,
                             including the Company's obligations under the
                             Revolving Credit Facility (as defined). The
                             Exchange Notes will rank on a parity with the
                             Company's outstanding 10 1/4% Senior Subordinated
                             Notes due 2006, Series A, and 10 1/4% Senior
                             Subordinated Notes due 2006, Series B
                             (collectively, the "Series A/B Notes"). The Company
                             may not incur any indebtedness senior to the
                             Exchange Notes which is expressly subordinated to
                             any other Senior Indebtedness. As of June 30, 1997,
                             after giving effect to the sale of the Outstanding
                             Notes, (i) the Company had Senior Indebtedness
                             outstanding of $61.3 million (which excludes $54.5
                             million representing Company guarantees of
                             Guarantor Senior Indebtedness), (ii) the Subsidiary
                             Guarantors had Guarantor Senior Indebtedness
                             outstanding of $16.5 million (which excludes $57.2
                             million representing guarantees of parent Senior
                             Indebtedness and $38.0 million consisting of
                             letters of credit) and (iii) $150 million in
                             principal amount of the Series A/B Notes was
                             outstanding. See "Description of the Exchange 
                             Notes--Subordination".

Guarantees.................  The Exchange Notes will be guaranteed (the
                             "Guarantees") by all of the Company's subsidiaries
                             (the "Subsidiary Guarantors"). The Guarantees will
                             be unsecured senior subordinated obligations of the
                             Subsidiary Guarantors, will be subordinated in
                             right of payment to all Guarantor Senior
                             Indebtedness and may be released under certain
                             circumstances. See "Description of the Exchange
                             Notes--Senior Subordinated Guarantees of Exchange
                             Notes".

                                       13
<PAGE>
 
                                 RISK FACTORS

     An investment in the Notes involves certain risks that a potential investor
should carefully evaluate prior to making an investment in the Notes.  See "Risk
Factors".

                FORWARD-LOOKING STATEMENTS AND ASSOCIATED RISKS

     This Prospectus and the documents incorporated by reference herein include
"forward-looking statements" within the meaning of various provisions of the
Securities Act and the Exchange Act.  All statements, other than statements of
historical facts, included in this Prospectus and the documents incorporated by
reference herein that address activities, events or developments that the
Company expects or anticipates will or may occur in the future, including such
things as estimated future net revenues from oil and natural gas reserves and
the present value thereof, future capital expenditures (including the amount and
nature thereof), business strategy and measures to implement strategy,
competitive strengths, goals, expansion and growth of the Company's business and
operations, plans, references to future success, references to intentions as to
future matters and other such matters are forward-looking statements.  These
statements are based on certain assumptions and analyses made by the Company in
light of its experience and its perception of historical trends, current
conditions and expected future developments as well as other factors it believes
are appropriate under the circumstances.  However, whether actual results and
developments will conform with the Company's expectations and predictions is
subject to a number of risks and uncertainties, including the risk factors
discussed in this Prospectus, general economic, market or business conditions,
the opportunities (or lack thereof) that may be presented to and pursued by the
Company, competitive actions by other oil and natural gas companies, changes in
laws or regulations, and other factors, many of which are beyond the control of
the Company.  Consequently, all of the forward-looking statements made in this
Prospectus and the documents incorporated by reference herein are qualified by
these cautionary statements and there can be no assurance that the actual
results or developments anticipated by the Company will be realized or, even if
substantially realized, that they will have the expected consequences to or
effects on the Company or its business or operations.

                                       14
<PAGE>
 
                                 RISK FACTORS

     Each investor should carefully examine this entire Prospectus and should
give particular attention to the risk factors set forth below.

LEVERAGE AND DEBT SERVICE

     As of June 30, 1997, giving effect to the issuance of the Outstanding Notes
and the application of the net proceeds therefrom, the Company's total long-term
debt and stockholders' equity were $262.6 million and $103.2 million,
respectively.  In addition, the Company may currently incur additional
indebtedness under its credit facilities.  The Company's Revolving Credit
Facility (as defined under "Description of Certain Indebtedness") currently
consists of a $165 million borrowing base, of which approximately $109.2 million
is outstanding as of June 30, 1997.

     The Company's level of indebtedness will have several important effects on
its future operations, including (i) a substantial portion of the Company's cash
flow from operations must be dedicated to the payment of interest on its
indebtedness and will not be available for other purposes, (ii) covenants
contained in the Company's debt obligations will require the Company to meet
certain financial tests, and other restrictions will limit its ability to borrow
additional funds or to dispose of assets and may affect the Company's
flexibility in planning for, and reacting to, changes in its business, including
possible acquisition activities and (iii) the Company's ability to obtain
additional financing in the future for working capital, capital expenditures,
acquisitions, general corporate purposes or other purposes may be impaired.  The
Company's ability to meet its debt service obligations and to reduce its total
indebtedness will be dependent upon the Company's future performance, which will
be subject to general economic conditions and to financial, business and other
factors affecting the operations of the Company, many of which are beyond its
control.  There can be no assurance that the Company's business will continue to
generate cash flow at or above current levels.  If the Company is unable to
generate sufficient cash flow from operations in the future to service its debt,
it may be required to refinance all or a portion of its existing debt, including
the Notes, or to obtain additional financing.  There can be no assurance that
any such refinancing would be possible or that any additional financing could be
obtained.

SUBORDINATION AND CORPORATE STRUCTURE

     The payment of principal of, premium, if any, and interest on, the Notes
will be subordinated in right of payment to the prior payment in full of all
Senior Indebtedness of the Company, whether outstanding at the date of the
Indenture or later incurred.  In the event of any default in the payment of the
principal or interest with respect to any Senior Indebtedness, no payment with
respect to the principal of, premium, if any, or interest on, the Notes will be
made by the Company unless and until such default has been cured or waived.  In
addition, upon the occurrence of any other event of default entitling the
holders of Senior Indebtedness to accelerate the maturity thereof and receipt by
the Trustee of written notice of such occurrence, the holders of Senior
Indebtedness will be able to block payment on the Notes for specified periods of
time.  All of the Company's subsidiaries will initially guarantee payments under
the Notes.  Such Guarantees will be subordinated to Guarantor Senior
Indebtedness of the Company's subsidiaries and may be released under certain
circumstances, including the designation of such subsidiary as an Unrestricted
Subsidiary (as defined) pursuant to the terms of the Indenture.  See
"Description of the Exchange Notes--Guarantees of Notes".

     Upon any payment or distribution of the Company's assets to creditors upon
any dissolution, winding up, liquidation, reorganization, bankruptcy,
insolvency, receivership or other proceedings relating to the Company, whether
voluntary or involuntary, the holders of Senior Indebtedness will be entitled
first to receive payment in full of all amounts due thereon before the holders
of the Notes will be entitled to receive any payment upon the principal of, or
premium, if any, or interest on, the Notes.  By reason of such subordination, in
the event of the insolvency of the Company, holders of the Notes may recover
less, ratably, than holders of Senior Indebtedness and other creditors of the
Company or may recover nothing.  The terms and conditions of the subordination
provisions pertinent to the Exchange Notes are described in more detail in
"Description of the Exchange Notes--Subordination".

                                       15
<PAGE>
 
     Substantially all of the Company's operating income is generated by its
subsidiaries. As a result, the Company has generally relied, and will continue
to rely, on distributions or advances from its subsidiaries to provide the funds
necessary to meet its debt service obligations, including the payment of
principal and interest on the Notes. Should the Company fail to satisfy any
payment obligation under the Notes, the holders would have a direct claim
therefor against the Subsidiary Guarantors pursuant to their Guarantees.
However, the capital stock of, and substantially all of the assets of, the
Subsidiary Guarantors are pledged to secure their obligations under the
Revolving Credit Facility and related guarantees. The Indenture imposes certain
limits on the ability of the Company and its subsidiaries (other than
Unrestricted Subsidiaries) to incur additional indebtedness and to enter into
agreements that would restrict the ability of such subsidiaries to make
distributions, loans or other payments to the Company. However, these
limitations are subject to various qualifications. For additional detail on
these Indenture provisions and the applicable qualifications, see "Description
of the Exchange Notes--Certain Covenants".

REPURCHASE OF NOTES UPON A CHANGE OF CONTROL OR ASSET SALES

     Upon the occurrence of a Change of Control and a corresponding Rating
Decline, the Company must offer to purchase all Notes then outstanding at a
purchase price equal to 101% of the principal amount thereof, plus accrued
interest to the date of purchase.  In the event of certain sales or other
dispositions of assets, the Company may be required under certain limited
circumstances to use the Net Available Proceeds (as defined) to effect a Net
Proceeds Offer.  See "Description of the Exchange Notes--Certain Covenants".

     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 that under the Revolving Credit Facility, or
(ii) obtain any requisite consent to permit the repurchase.  If the Company is
unable to repay all of such indebtedness or is unable to obtain the necessary
consents, then the Company will be unable to offer to purchase the Notes and
such failure will constitute an Event of Default under the Indenture.  There can
be no assurance that the Company will have sufficient funds available at the
time of any Change of Control or Excess Proceeds Offer to repurchase the Notes.

     The events that require a Change of Control or Net Proceeds Offer under the
Indenture may also constitute events of default under the Revolving Credit
Facility or other Senior Indebtedness of the Company.  Such events may permit
the lenders under such debt instruments to accelerate the debt and, if the debt
is not paid, to commence litigation which could ultimately result in a sale of
substantially all the assets of the Company to satisfy the debt, thereby
limiting the Company's ability to raise cash to repurchase the Notes and
reducing the practical benefit of the offer to purchase provisions to the
holders of the Notes.

MARKET CONDITIONS AND VOLATILITY OF OIL AND NATURAL GAS PRICES

     The revenues generated by the Company's operations are highly dependent
upon the prices of, and demand for, oil and natural gas.  Historically, the
prices for oil and natural gas have been volatile and are likely to continue to
be volatile in the future.  The price received by the Company for its oil and
natural gas production and the level of such production are subject to wide
fluctuations and depend on numerous factors beyond the Company's control,
including seasonality, the condition of the United States economy (particularly
the manufacturing sector), foreign imports, political conditions in other oil-
producing and natural gas-producing countries, the actions of the Organization
of Petroleum Exporting Countries and domestic government regulation, legislation
and policies.  Decreases in the prices of oil and natural gas have had, and
could have in the future, an adverse effect on the carrying value of the
Company's proved reserves and the Company's revenues, profitability and cash
flow.  Although the Company is not currently experiencing any significant
involuntary curtailment of its natural gas production, market, economic and
regulatory factors may in the future materially affect the Company's ability to
sell its natural gas production.

     In order to manage its exposure to price risks in the marketing of its oil
and natural gas, the Company from time to time enters into fixed price delivery
contracts, financial swaps and oil and natural gas futures contracts as hedging
devices.  To ensure a fixed price for future production, the Company may sell a
futures contract and thereafter either (i) make physical delivery of its product
to comply with such contract or (ii) buy a matching futures contract to unwind
its futures position and sell its production to a customer.  These same
techniques are also utilized 

                                       16
<PAGE>
 
to manage price risk for certain production purchased from customers of the
Company's marketing subsidiary, Plains Marketing & Transportation Inc. Such
contracts may expose the Company to the risk of financial loss in certain
circumstances, including instances where production is less than expected, the
Company's customers fail to purchase or deliver the contracted quantities of oil
or natural gas, or a sudden, unexpected event materially impacts oil or natural
gas prices. Such contracts may also restrict the ability of the Company to
benefit from unexpected increases in oil and natural gas prices.

OPERATING HAZARDS AND UNINSURED RISKS

     The Company's operations are subject to all of the risks normally incident
to the exploration for and the production of oil and natural gas, including
blowouts, cratering, oil spills and fires, each of which could result in damage
to or destruction of oil and natural gas wells, production facilities or other
property, or injury to persons.  The relatively deep drilling conducted by the
Company from time to time involves increased drilling risks of high pressures
and mechanical difficulties, including stuck pipe, collapsed casing and
separated cable.  The Company's operations in the LA Basin, including
transportation of crude oil by pipelines within the city of Los Angeles, are
especially susceptible to damage from earthquakes and involve increased risks of
personal injury, property damage and marketing interruptions because of the
population density of the area.  Although the Company maintains insurance
coverage considered to be customary in the industry, it is not fully insured
against certain of these risks, including, in certain instances, earthquake risk
in the LA Basin, either because such insurance is not available or because of
high premium costs.  The occurrence of a significant event that is not fully
insured against could have a material adverse effect on the Company's financial
position.

BUSINESS RISKS

     The Company must continually acquire, explore for, develop or exploit new
oil and natural gas reserves to replace those produced or sold.  Without
successful drilling, acquisition or exploitation operations, the Company's oil
and natural gas reserves and revenues will decline.  Drilling activities are
subject to numerous risks, including the risk that no commercially viable oil or
natural gas production will be obtained.  The decision to purchase, explore,
exploit or develop an interest or property will depend in part on the evaluation
of data obtained through geophysical and geological analyses and engineering
studies, the results of which are often inconclusive or subject to varying
interpretations.  The cost of drilling, completing and operating wells is often
uncertain.  Drilling may be curtailed, delayed or canceled as a result of many
factors, including title problems, weather conditions, compliance with
government permitting requirements, shortages of or delays in obtaining
equipment, reductions in product prices or limitations in the market for
products.  The availability of a ready market for the Company's oil and natural
gas production also depends on a number of factors, including the demand for and
supply of oil and natural gas and the proximity of reserves to pipelines or
trucking and terminal facilities.  Natural gas wells may be shut in for lack of
a market or due to inadequacy or unavailability of natural gas pipeline or
gathering system capacity.

UNCERTAINTIES IN ESTIMATING RESERVES AND FUTURE NET CASH FLOWS

     There are numerous uncertainties inherent in estimating quantities and
values of proved reserves and in projecting future rates of production and
timing of development expenditures, including many factors beyond the control of
the Company.  Reserve engineering is a subjective process of estimating the
recovery from underground accumulations of oil and natural gas that cannot be
measured in an exact manner, and the accuracy of any reserve estimate is a
function of the quality of available data and of engineering and geological
interpretation and judgment.  Because all reserve estimates are to some degree
speculative, the quantities of oil and natural gas that are ultimately
recovered, production and operating costs, the amount and timing of future
development expenditures and future oil and natural gas sales prices may all
differ from those assumed in these estimates.  In addition, different reserve
engineers may make different estimates of reserve quantities and cash flows
based upon the same available data.  Therefore, the Present Value of Proved
Reserves set forth or incorporated by reference in this Prospectus represents
estimates only and should not be construed as the current market value of the
estimated oil and natural gas reserves attributable to the Company's properties.
In this regard, the information set forth or incorporated by reference in this
Prospectus includes revisions of certain reserve estimates attributable to
proved properties included in the preceding year's estimates.  Such revisions
reflect additional information from subsequent activities, production 

                                       17
<PAGE>
 
history of the properties involved and any adjustments in the projected economic
life of such properties resulting from changes in product prices. Any downward
revisions could adversely affect the Company's financial condition, borrowing
base under the Revolving Credit Facility, future prospects and market value of
its securities.

GOVERNMENT REGULATION

     The Company's business is regulated by certain federal, state and local
laws and regulations relating to the development, production, marketing,
pricing, transportation and storage of oil and natural gas.  The Company's
business is also subject to extensive and changing environmental and safety laws
and regulations governing plugging and abandonment, the discharge of materials
into the environment or otherwise relating to environmental protections.
Certain of the Company's properties are located in environmentally sensitive
areas that require special permits to drill.  There can be no assurance that
present or future regulation will not adversely affect the operations of the
Company.

COMPETITION

     The oil and natural gas industry is highly competitive.  The Company's
competitors for the acquisition, exploration, exploitation and development of
oil and natural gas properties, the purchasing and marketing of oil and the
crude oil storage and terminalling business, and for capital to finance such
activities, include companies that have greater financial and personnel
resources available to them than the Company.  The Company's ability to acquire
additional properties and to discover reserves in the future will be dependent
upon its ability to evaluate and select suitable properties and to consummate
transactions in a highly competitive environment.

FRAUDULENT CONVEYANCE

     Various fraudulent conveyance laws enacted for the protection of creditors
may apply to the Subsidiary Guarantors' issuance of the Guarantees.  To the
extent that a court were to find that (x) a Guarantee was incurred by a
Subsidiary Guarantor with intent to hinder, delay or defraud any present or
future creditor or the Subsidiary Guarantor contemplated insolvency with a
design to prefer one or more creditors to the exclusion in whole or in part of
others or (y) a Subsidiary Guarantor did not receive fair consideration or
reasonably equivalent value for issuing its Guarantee and such Subsidiary
Guarantor (i) was insolvent, (ii) was rendered insolvent by reason of the
issuance of such Guarantee, (iii) was engaged or about to engage in a business
or transaction for which the remaining assets of such Subsidiary Guarantor
constituted unreasonably small capital to carry on its business or (iv) intended
to incur, or believed that it would incur, debts beyond its ability to pay such
debts as they matured, the court could avoid or subordinate such Guarantee in
favor of the Subsidiary Guarantor's creditors.  Among other things, a legal
challenge of a Guarantee on fraudulent conveyance grounds may focus on the
benefits, if any, realized by the Subsidiary Guarantor as a result of the
issuance by the Company of the Notes.  The Indenture contains a savings clause,
which generally limits the obligations of each Subsidiary Guarantor under its
Guarantee to the maximum amount as will, after giving effect to all of the
liabilities of such Subsidiary Guarantor, result in such obligations not
constituting a fraudulent conveyance.  To the extent a Guarantee of any
Subsidiary Guarantor was avoided as a fraudulent conveyance or held
unenforceable for any other reason, holders of the Notes would cease to have any
claim against such Subsidiary Guarantor and would be creditors solely of the
Company and any Subsidiary Guarantor whose Guarantee was not avoided or held
unenforceable.  In such event, the claims of the holders of the Notes against
the issuer of an invalid Guarantee would be subject to the prior payment of all
liabilities of such Subsidiary Guarantor.  There can be no assurance that, after
providing for all prior claims, there would be sufficient assets to satisfy the
claims of the holders of the Notes relating to any avoided portions of any of
the Guarantees.

     The measure of insolvency for purposes of the foregoing considerations will
vary depending upon the law applied in any such proceeding.  Generally, however,
a Subsidiary Guarantor may be considered insolvent if the sum of its debts,
including contingent liabilities, was greater than the fair marketable value of
all of its assets at a fair valuation or if the present fair marketable value of
its assets was 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.

                                       18
<PAGE>
 
     Based upon financial and other information, the Company and the Subsidiary
Guarantors believe that the Guarantees are being incurred for proper purposes
and in good faith and that the Company and each Subsidiary Guarantor is solvent
and will continue to be solvent after issuing its Guarantee, will have
sufficient capital for carrying on its business after such issuance and will be
able to pay its debts as they mature.  There can be no assurance, however, that
a court passing on such standards would agree with the Company.

ABSENCE OF PUBLIC MARKET FOR THE EXCHANGE NOTES

     The Outstanding Notes are currently owned by a relatively small number of
beneficial owners.  The Outstanding Notes have not been registered under the
Securities Act and will be subject to significant restrictions on resale.  The
Exchange Notes will constitute a new issue of securities with no established
trading market.  The Company does not intend to list the Outstanding Notes or
the Exchange Notes on any national securities exchange or to seek the admission
thereof to trading in the National Association of Securities Dealers Automated
Quotation System.  The Company has been advised by the Initial Purchaser that,
following completion of the Exchange Offer, it presently intends to make a
market in the Exchange Notes.  However, the Initial Purchaser is not obligated
to do so, and any market making activity with respect to the Exchange Notes may
be discontinued at any time without notice.  In addition, such market making
activity will be subject to the limits imposed in the Exchange Act, and may be
limited during the Exchange Offer or the pendency of the Shelf Registration
Statement.  Accordingly no assurance can be given that an active public or other
market will develop for the Exchange Notes or as to the liquidity of or the
trading market for the Exchange Notes.

EXCHANGE OFFER PROCEDURES

     Issuance of the Exchange Notes in exchange for Outstanding Notes pursuant
to the Exchange Offer will be made only after a timely receipt by the Company of
such Outstanding Notes, a properly completed and duly executed Letter of
Transmittal and all other required documents.  Therefore, holders of the
Outstanding Notes desiring to tender such Outstanding Notes in exchange for
Exchange Notes should allow sufficient time to ensure timely delivery.  The
Company is under no duty to give notification of defects or irregularities with
respect to the tenders of Outstanding Notes for exchange.  Outstanding Notes
that are not tendered or are tendered but not accepted will, following the
consummation of the Exchange Offer, continue to be subject to the existing
restrictions upon transfer thereof.  Upon consummation of the Exchange Offer,
the registration rights under the Registration Rights Agreement will terminate
except that if any holder of an Outstanding Note notifies the Company on or
prior to the Exchange Date that (i) due to a change in law or policy it is not
entitled to participate in the Exchange Offer, (ii) due to a change in law or
policy it may not resell the Exchange Notes acquired by it in the Exchange Offer
to the public without delivering a prospectus and this prospectus is not
appropriate or available for such resales by such holder or (iii) it is a
broker-dealer that owns Outstanding Notes (including an Initial Purchaser that
holds Outstanding Notes as part of an unsold allotment from the original
offering of the Outstanding Notes) acquired directly from the Company or an
affiliate of the Company, then the Company has agreed to file and maintain for a
period of three years the Shelf Registration Statement.  In addition, any holder
of Outstanding Notes who tenders in the Exchange Offer for the purpose of
participating in a distribution of the Exchange Notes may be deemed to have
received restricted securities and, if so, will be required to comply with the
registration and prospectus delivery 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 Outstanding Notes, where such
Outstanding 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".  To the extent that Outstanding Notes are tendered and
accepted in the Exchange Offer, the trading market for untendered and tendered
but unaccepted Outstanding Notes could be adversely affected.  See "The Exchange
Offer".

                                       19
<PAGE>
 
                              THE EXCHANGE OFFER

PURPOSE AND EFFECT OF THE EXCHANGE OFFER

     The Outstanding Notes were sold by the Company on July 23, 1997, to the
Initial Purchaser pursuant to the Purchase Agreement.  The Initial Purchaser
subsequently placed the Outstanding Notes with qualified institutional buyers in
reliance on Rule 144A under the Securities Act.  As a condition of the purchase
of the Outstanding Notes by the Initial Purchaser, the Company and the
Subsidiary Guarantors entered into the Registration Rights Agreement with the
Initial Purchaser, which requires, among other things, that the Company file
with the Commission a registration statement under the Securities Act with
respect to an offer by the Company to the holders of the Outstanding Notes to
issue and deliver to such holders, in exchange for Outstanding Notes, a like
principal amount of Exchange Notes.  The Company is required to use its best
efforts to cause the Registration Statement relating to the Exchange Offer to be
declared effective by the Commission under the Securities Act and commence the
Exchange Offer and use best efforts to issue, on or prior to the Exchange Date,
the Exchange Notes.  The Exchange Notes are to be issued without a restrictive
legend and may be reoffered and resold by the holder without restrictions or
limitations under the Securities Act (other than any such holder that is an
"affiliate" of the Company within the meaning of Rule 405 under the Securities
Act).  A copy of the Registration Rights Agreement has been filed as an exhibit
to the Registration Statement of which this Prospectus is a part.  The term
"Holder" with respect to the Exchange Offer means any person in whose name the
Outstanding Notes are registered on the books of the Company or any other person
who has obtained a properly completed bond power from the registered holder.

TERMS OF THE EXCHANGE OFFER

     Upon the terms and subject to the conditions set forth in this Prospectus
and in the Letter of Transmittal, the Company will accept any and all
Outstanding Notes validly tendered and not withdrawn prior to 5:00 p.m., New
York City time, on the Expiration Date.  On the Exchange Date, the Company will
issue $1,000 principal amount of Exchange Notes in exchange for $1,000 principal
amount of Outstanding Notes accepted in the Exchange Offer.  Holders may tender
some or all of their Outstanding Notes pursuant to the Exchange Offer.  However,
Outstanding Notes may be tendered only in integral multiples of $1,000.

     The form and terms of the Exchange Notes are the same as the form and terms
of the Outstanding Notes except that (i) the Exchange Notes have been registered
under the Securities Act and hence will not bear legends restricting the
transfer thereof and (ii) the holders of the Exchange Notes will not be entitled
to certain rights under the Registration Rights Agreement.  The Exchange Notes
will evidence the same debt as the Outstanding Notes and will be entitled to the
benefits of the Indenture.

     As of the date of this Prospectus, $50,000,000 aggregate principal amount
of the Outstanding Notes was outstanding and registered in the name of Cede &
Co., as nominee for the Depository Trust Company.  The Company has fixed the
close of business of _____________, 1997, as the record date for the Exchange
Offer for purposes of determining the person to whom this Prospectus and the
Letter of Transmittal will be mailed initially.

     Holders of Outstanding Notes do not have any appraisal or dissenters'
rights under the General Corporation Law of Delaware or the Indenture in
connection with the Exchange Offer.  The Company intends to conduct the Exchange
Offer in accordance with the applicable requirements of the Exchange Act and the
rules and regulations of the Commission thereunder, including Rule 14e-1
thereunder.

     The Company shall be deemed to have accepted validly tendered Outstanding
Notes when, as and if the Company has given oral or written notice thereof to
the Exchange Agent.  The Exchange Agent will act as agent for the tendering
Holders for the purpose of receiving the Exchange Notes from the Company.

     If any tendered Outstanding Notes are not accepted for exchange because of
an invalid tender, the occurrence of certain other events set forth herein or
otherwise, the certificates for any such unaccepted Outstanding Notes will be
returned, without expense, to the tendering Holder thereof as promptly as
practicable after the Expiration Date.

                                       20
<PAGE>
 
     Holders who tender Outstanding Notes in the Exchange Offer will not be
required to pay brokerage commissions or fees or, subject to the instructions in
the Letter of Transmittal, transfer taxes with respect to the exchange of
Outstanding Notes pursuant to the Exchange Offer.  The Company will pay all
charges and expenses, other than transfer taxes in certain circumstances, in
connection with the Exchange Offer.  See "--Fees and Expenses".

INTEREST ON THE EXCHANGE NOTES

     The Exchange Notes will bear interest from the date of issuance of the
Exchange Notes.  Interest on the Outstanding Notes that are tendered in exchange
for the Exchange Notes that has accrued from July 23, 1997, the date of issuance
of the Outstanding Notes, through the Exchange Date will be payable on or before
September 15, 1997.  Interest on the Exchange Notes will be payable semi-
annually on each March 15 and September 15, commencing September 15, 1997.

PROCEDURES FOR TENDERING

     Only a Holder of Outstanding Notes may tender such Outstanding Notes in the
Exchange Offer.  To tender in the Exchange Offer, a Holder must complete, sign
and date the Letter of Transmittal, or a facsimile thereof, have the signatures
thereon guaranteed if required by the Letter of Transmittal and mail or
otherwise deliver such Letter of Transmittal or such facsimile, together with
the Outstanding Notes and any other required documents, to the Exchange Agent
prior to 5:00 p.m., New York City time, on the Expiration Date.  To be tendered
effectively, the Outstanding Notes, Letter of Transmittal and other required
documents must be received by the Exchange Agent at the address set forth below
under "Exchange Agent" prior to 5:00 p.m., New York City time, on the Expiration
Date.  Delivery of the Outstanding Notes may be made by book-entry transfer in
accordance with the procedures described below.  Confirmation of such book-entry
transfer must be received by the Exchange Agent prior to the Expiration Date.

     By executing the Letter of Transmittal, each Holder will make to the
Company the representation set forth below in the second paragraph under the
heading "Resale of Exchange Notes".

     The tender by a Holder and the acceptance thereof by the Company will
constitute agreement between such Holder and the Company in accordance with the
terms and subject to the conditions set forth herein and in the Letter of
Transmittal.

     THE METHOD OF DELIVERY OF OUTSTANDING NOTES AND THE LETTER OF TRANSMITTAL
AND ALL OTHER REQUIRED DOCUMENTS TO THE EXCHANGE AGENT IS AT THE ELECTION AND
RISK OF THE HOLDER.  INSTEAD OF DELIVERY BY MAIL, IT IS RECOMMENDED THAT HOLDERS
USE AN OVERNIGHT OR HAND DELIVERY SERVICE.  IN ALL CASES, SUFFICIENT TIME SHOULD
BE ALLOWED TO ASSURE DELIVERY TO THE EXCHANGE AGENT BEFORE THE EXPIRATION DATE.
NO LETTER OF TRANSMITTAL OR OUTSTANDING NOTES SHOULD BE SENT TO THE COMPANY.
HOLDERS MAY REQUEST THEIR RESPECTIVE BROKERS, DEALERS, COMMERCIAL BANKS, TRUST
COMPANIES OR NOMINEES TO EFFECT THE ABOVE TRANSACTIONS FOR SUCH HOLDERS.

     Any beneficial owner whose Outstanding Notes are registered in the name of
a broker, dealer, commercial bank, trust company or other nominee and who wishes
to tender should contact the registered Holder promptly and instruct such
registered Holder to tender on such beneficial owner's behalf.

     Signatures on the Letter of Transmittal or a notice of withdrawal, as the
case may be, must be guaranteed by an Eligible Institution (as defined below)
unless the Outstanding Notes tendered pursuant thereto are tendered (i) by a
registered Holder who has not completed the box entitled "Special Registration
Instructions" or "Special Delivery Instructions" on the Letter of Transmittal or
(ii) for the account of an Eligible Institution.  In the event that signatures
on a Letter of Transmittal or a notice of withdrawal, as the case may be, are
required to be guaranteed, such guarantee must be by a member firm of a
registered national securities exchange or of the National Association of
Securities Dealers, Inc., a commercial bank or trust company having an office or
correspondent in 

                                       21
<PAGE>
 
the United States or an "eligible guarantor institution" within the meaning of
Rule 17Ad-15 under the Exchange Act (an "Eligible Institution").

     If the Letter of Transmittal is signed by a person other than the
registered Holder of any Outstanding Notes listed therein, such Outstanding
Notes must be endorsed or accompanied by a properly completed bond power, signed
by such registered Holder as such registered Holder's name appears on such
Outstanding Notes with the signature thereon guaranteed by an Eligible
Institution.

     If the Letter of Transmittal or any Outstanding Notes or bond powers 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, evidence satisfactory to the Company of their authority to so act must
be submitted with the Letter of Transmittal.

     The Company understands that the Exchange Agent will make a request
promptly after the date of this Prospectus to establish accounts with respect to
the Exchange Notes at the DTC (the "Book-Entry Transfer Facility") for the
purpose of facilitating the Exchange Offer, and subject to the establishment
thereof, any financial institution that is a participant in the Book-Entry
Transfer Facility's system may make book-entry delivery of the Outstanding Notes
by causing such Book-Entry Transfer Facility to transfer such Outstanding Notes
into the Exchange Agent's account with respect to the Outstanding Notes in
accordance with the Book-Entry Transfer Facility's procedures for such transfer.
Although delivery of the Outstanding Notes may be effected through book-entry
transfer into the Exchange Agent's account at the Book-Entry Transfer Facility,
an appropriate Letter of Transmittal properly completed and duly executed with
any required signature guarantee and all other required documents must in each
case be transmitted to and received or confirmed by the Exchange Agent at its
address set forth below on or prior to the Expiration Date, or, if the
guaranteed delivery procedures described below are complied with, within the
time period provided under such procedures; provided, however, that a
participant in DTC's book-entry system may, in accordance with DTC's Automated
Tender Offer Program procedures and in lieu of physical delivery to the Exchange
Agent of a Letter of Transmittal, electronically acknowledge its receipt of, and
agreement to be bound by, the terms of the Letter of Transmittal.  Delivery of
documents to the Book-Entry Transfer Facility does not constitute delivery to
the Exchange Agent.

     All questions as to the validity, form, eligibility (including time of
receipt), acceptance and withdrawal of tendered Outstanding Notes will be
determined by the Company in its sole discretion, which determination will be
final and binding.  The Company reserves the absolute right to reject any and
all Outstanding Notes not properly tendered or any Outstanding Notes the
Company's acceptance of which would, in the opinion of counsel for the Company,
be unlawful.  The Company also reserves the right to waive any defects,
irregularities or conditions of tender as to particular Outstanding Notes.  The
Company's interpretation of the terms and conditions of the Exchange Offer
(including the instructions in the Letter of Transmittal) will be final and
binding on all parties.  Unless waived, any defects or irregularities in
connection with tenders of Outstanding Notes must be cured within such time as
the Company shall determine.  Although the Company intends to notify Holders of
defects or irregularities with respect to tenders of Outstanding Notes, neither
the Company, the Exchange Agent nor any other person shall incur any liability
for failure to give such notification.  Tenders of Outstanding Notes will not be
deemed to have been made until such defects or irregularities have been cured or
waived.  Any Outstanding Notes received by the Exchange Agent that are not
properly tendered and as to which the defects or irregularities have not been
cured or waived will be returned by the Exchange Agent to the tendering Holders,
unless other provided in the Letter of Transmittal, as soon as practicable
following the Expiration Date.

GUARANTEED DELIVERY PROCEDURES

     Holders who wish to tender their Outstanding Notes and (i) whose
Outstanding Notes are not immediately available, (ii) who cannot deliver their
Outstanding Notes, the Letter of Transmittal or any other required documents to
the Exchange Agent or (iii) who cannot complete the procedures for book-entry
transfer, prior to the Expiration Date, may effect a tender if:

                                       22
<PAGE>
 
          (a) the tender is made through an Eligible Institution;

          (b) prior to the Expiration Date, the Exchange Agent receives from
     such Eligible Institution a properly completed and duly executed Notice of
     Guaranteed Delivery (by facsimile transmission, mail or hand delivery)
     setting forth the name and address of the Holder, the certificate number(s)
     of such Outstanding Notes and the principal amount of Outstanding Notes
     tendered, stating that the tender is being made thereby and guaranteeing
     that, within five New York Stock Exchange trading days after the Expiration
     Date, the Letter of Transmittal (or facsimile thereof), together with the
     certificate(s) representing the Outstanding Notes (or a confirmation of
     book-entry transfer of such Outstanding Notes into the Exchange Agent's
     account at the Book-Entry Transfer Facility) and any other documents
     required by the Letter of Transmittal, will be deposited by the Eligible
     Institution with the Exchange Agent; and

          (c) such properly completed and executed Letter of Transmittal (or
     facsimile thereof), as well as the certificate(s) representing all tendered
     Outstanding Notes in proper form for transfer (or a confirmation of book-
     entry transfer of such Outstanding Notes into the Exchange Agent's account
     at the Book-Entry Transfer Facility) and all other documents required by
     the Letter of Transmittal, are received by the Exchange Agent within five
     New York Stock Exchange trading days after the Expiration Date.

     Upon request to the Exchange Agent, a Notice of Guaranteed Delivery will be
sent to Holders who wish to tender their Outstanding Notes according to the
guaranteed delivery procedures set forth above.

WITHDRAWALS OF TENDERS

     Except as otherwise provided herein, tenders of Outstanding Notes may be
withdrawn at any time prior to 5:00 p.m., New York City time, on the Expiration
Date.

     To withdraw a tender of Outstanding Notes in the Exchange Offer, a written
or facsimile transmission notice of withdrawal must be received by the Exchange
Agent at its address set forth herein prior to 5:00 p.m., New York City time, on
the Expiration Date.  Any such notice of withdrawal must (i) specify the name of
the person having deposited the Outstanding Notes to be withdrawn (the
"Depositor"), (ii) identify the Outstanding Notes to be withdrawn (including the
certificate number(s) and principal amount of such Outstanding Notes, or, in the
case of Outstanding Notes transferred by book-entry transfer, the name and
number of the account at the Book-Entry Transfer Facility to be credited), (iii)
be signed by the Holder in the same manner as the original signature on the
Letter of Transmittal by which such Outstanding Notes were tendered (including
any required signature guarantees) or be accompanied by documents of transfer
sufficient to have the Trustee with respect to the Outstanding Notes register
the transfer of such Outstanding Notes into the name of the person withdrawing
the tender, (iv) specify the name in which any such Outstanding Notes are to be
registered, if different from that of the Depositor and (v) if applicable
because the Outstanding Notes have been tendered pursuant to book-entry
procedures, specify the name and number of the participant's account at DTC to
be credited, if different from that of the Depositor.  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 Outstanding Notes so withdrawn will be deemed not to have been
validly tendered for purposes of the Exchange Offer and no Exchange Notes will
be issued with respect thereto unless the Outstanding Notes so withdrawn are
validly retendered.  Any Outstanding Notes which have been tendered but which
are not accepted for exchange, will be returned to the Holder thereof without
cost to such Holder as soon as practicable after withdrawal, rejection of tender
or termination of the Exchange Offer.  Properly withdrawn Outstanding Notes may
be retendered by following one of the procedures described above under "--
Procedures for Tendering" at any time prior to the Expiration Date.

CONDITIONS

     Notwithstanding any other term of the Exchange Offer, the Company shall not
be required to accept for exchange, or to issue Exchange Notes for, any
Outstanding Notes, and may terminate or amend the Exchange Offer as provided
herein before the acceptance of such Outstanding Notes, if:

                                       23
<PAGE>
 
          (a)  any action or proceeding is instituted or threatened in any court
     or by or before any governmental agency with respect to the Exchange Offer
     that might materially impair the ability of the Company to proceed with the
     Exchange Offer or any material adverse development has occurred in any
     existing action or proceeding with respect to the Company or any of its
     subsidiaries; or

          (b)  any change, or any development involving a prospective change, in
     the business or financial affairs of the Company or any of its subsidiaries
     has occurred that might materially impair the ability of the Company to
     proceed with the Exchange Offer; or

          (c)  any law, statute, rule, regulation or interpretation by the staff
     of the Commission is proposed, adopted or enacted that might materially
     impair the ability of the Company to proceed with the Exchange Offer or
     materially impair the contemplated benefits of the Exchange Offer to the
     Company; or

          (d)  any governmental approval has not been obtained, which approval
     the Company shall, in its sole discretion, deem necessary for the
     consummation of the Exchange Offer as contemplated hereby.

     If the Company determines in good faith and in the exercise of its
reasonable discretion that any of the conditions are not satisfied, the Company
may (i) refuse to accept any Outstanding Notes and return all tendered
Outstanding Notes to the tendering Holders, (ii) extend the Exchange Offer and
retain all Outstanding Notes tendered prior to the expiration of the Exchange
Offer, subject, however, to the rights of Holders to withdraw such Outstanding
Notes (see"--Withdrawal of Tenders") or (iii) waive such unsatisfied conditions
with respect to the Exchange Offer and accept all properly tendered Outstanding
Notes which have not been withdrawn.  If such waiver constitutes a material
change to the Exchange Offer, the Company will promptly disclose such waiver by
means of a prospectus supplement that will be distributed to the registered
Holders, and, depending upon the significance of the waiver and the manner of
disclosure to the registered Holders, the Company will extend the Exchange Offer
for a period of five to 10 business days if the Exchange Offer would otherwise
expire during such five to 10 day period.

EXCHANGE AGENT

     Texas Commerce Bank National Association has been appointed as Exchange
Agent for the Exchange Offer.  Questions and requests for assistance, requests
for additional copies of his Prospectus or of the Letter of Transmittal and
requests for Notice of Guaranteed Delivery should be directed to the Exchange
Agent addressed as follows:

<TABLE>
<CAPTION> 

<S>                                         <C>                                         <C>
By Registered or Certified Mail:            By Overnight Mail or Hand:                  By Facsimile:
Texas Commerce Bank National Association    Texas Commerce Bank National Association    Texas Commerce Bank National Association
Attention:  Frank Ivins,                    Attention:  Frank Ivins,                    (214) 672-5746
            Registered Bond Events                      Registered Bond Events          Confirm: (800) 275-2048
P.O. Box 2320                               1201 Main Street, 18th Floor
Dallas, Texas  75221-2320                   Dallas, Texas  75202

</TABLE>


FEES AND EXPENSES

     The expenses of soliciting tenders pursuant to the Exchange Offer will be
borne by the Company.  The principal solicitation is being made by mail;
however, additional solicitation may be made by telegraph, telephone or in
person by officers and regular employees of the Company and its affiliates.

     The Company has not retained any dealer-manager in connection with the
Exchange Offer and will not make any payments to brokers or other soliciting
acceptances of the Exchange Offer.  The Company, however, will pay the Exchange
Agent reasonable and customary fees for its services and registration expenses,
including fees and expenses of the Trustee, filing fees, blue sky fees and
printing and distribution expenses.

                                       24
<PAGE>
 
     The Company will pay all transfer taxes, if any, applicable to the exchange
of the Outstanding Notes pursuant to the Exchange Offer.  If, however,
certificates representing the Exchange Notes or the Outstanding Notes for the
principal amounts not tendered or accepted for exchange are to be delivered to,
or are to be issued in the name of, any person other than the person signing the
Letter of Transmittal, or if a transfer tax is imposed for any reason other than
the exchange of the Outstanding Notes pursuant to the Exchange Offer, then the
amount of any such transfer taxes (whether imposed on the registered Holder or
any other person) will be payable by the tendering Holder.

ACCOUNTING TREATMENT

     The Exchange Notes will be recorded at the same carrying value as the
Outstanding Notes, which is face value as adjusted for original issue premium,
as reflected in the Company's accounting records on the date of exchange.
Accordingly, no gain or loss for accounting purposes will be recognized.  The
expenses of the Exchange Offer will be amortized over the term of the Exchange
Notes.

RESALE OF EXCHANGE NOTES

     Based on an interpretation by the staff of the Commission set forth in no-
action letters issued to third parties, the Company believes that Exchange Notes
issued pursuant to the Exchange Offer in exchange for Outstanding Notes may be
offered for resale, resold and otherwise transferred by any holder of such
Exchange Notes (other than any such holder which is an "affiliate" of the
Company within the meaning of Rule 405 under the Securities Act) 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 holder's business and such holder does not intend to participate
and has no arrangement or understanding with any person to participate in the
distribution of such Exchange Notes.  Any holder who tenders in the Exchange
Offer with the intention to participate, or for the purpose of participating, in
a distribution of the Exchange Notes may not rely on the position of the staff
of the Commission enunciated in Exxon Capital Holdings Corporation (available
April 13, 1989) and Morgan Stanley & Co., Incorporated (June 5, 1991), or
similar no-action letters, but rather must comply with the registration and
prospectus delivery requirements of the Securities Act in connection with any
resale transaction.  In addition, any such resale transaction should be covered
by an effective registration statement containing the selling security holders
information required by Item 507 of Regulation S-K of the Securities Act.  Each
broker-dealer that receives Exchange Notes for its own account in exchange for
Outstanding Notes, where such Outstanding 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".

     By tendering in the Exchange Offer, each Holder will represent to the
Company that, among other things, (i) the Exchange Notes acquired pursuant to
the Exchange Offer are being obtained in the ordinary course of business of the
person receiving such Exchange Notes, whether or not such person is a Holder,
(ii) neither the Holder nor any such other person has an arrangement or
understanding with any person to participate in the distribution of such
Exchange Notes and (iii) the Holder and such other person acknowledge that if
they participate in the Exchange Offer for the purpose of distributing the
Exchange Notes (a) they must, in the absence of an exemption therefrom, comply
with the registration and prospectus delivery requirements of the Securities Act
in connection with any resale of the Exchange Notes and cannot rely on the no-
action letters referenced above and (b) failure to comply with such requirements
in such instance could result in such Holder incurring liability under the
Securities Act for which such Holder is not indemnified by the Company.
Further, by tendering in the Exchange Offer, each Holder that may be deemed an
"affiliate" (as defined under Rule 405 of the Securities Act) of the Company
will represent to the Company that such Holder understands and acknowledges that
the Exchange Notes may not be offered for resale, resold or otherwise
transferred by that Holder without registration under the Securities Act or an
exemption therefrom.

     As set forth above, affiliates of the Company are not entitled to rely on
the foregoing interpretations of the staff of the Commission with respect to
resales of the Exchange Notes without compliance with the registration and
prospectus delivery requirements of the Securities Act.

                                       25
<PAGE>
 
PRIVATE EXCHANGE NOTES

     The Registration Rights Agreement provides that if, prior to consummation
of the Exchange Offer, the Initial Purchaser holds any Outstanding Notes
acquired by it and having, or which are reasonably likely to be determined to
have, the status of an unsold allotment in the initial distribution, or any
other holder of Outstanding Notes is not entitled to participate in the Exchange
Offer, the Company upon the request of such Initial Purchaser or any such holder
shall, simultaneously with the delivery of the Exchange Notes in the Exchange
Offer, issue and deliver to the Initial Purchaser and any such holder, in
exchange (the "Private Exchange") for such Outstanding Notes held by the Initial
Purchaser and any such holder, Private Exchange Notes.  Any Private Exchange
Notes will be issued pursuant to the same indenture as the Exchange Notes.  The
Private Exchange Notes are not covered by the registration statement of which
this Prospectus is a part and are not being offered hereby.  Any Private
Exchange Notes will be entitled to all the rights and subject to all the
limitations applicable thereto under the Indenture, and will be subject to the
same restrictions on transfer applicable to untendered Outstanding Notes.  See
"--Consequences of Failure to Exchange".  However, pursuant to the Registration
Rights Agreement, holders of Private Exchange Notes have certain rights to
require the Company to file and maintain a shelf registration statement that
would allow resales of such Private Exchange Notes owned by such holders.  See
"--Shelf Registration Statement".

CONSEQUENCES OF FAILURE TO EXCHANGE

     As a result of the making of this Exchange Offer, the Company will have
fulfilled one of its obligations under the Registration Rights Agreement, and,
except as described under "--Shelf Registration Statement", Holders of
Outstanding Notes who do not tender their Outstanding Notes will not have any
further registration rights under the Registration Rights Agreement or
otherwise.  Accordingly, any Holder of Outstanding Notes that does not exchange
that Holder's Outstanding Notes for Exchange Notes will continue to hold the
untendered Outstanding Notes and will be entitled to all the rights and
limitations applicable thereto under the Indenture, except to the extent such
rights or limitations that, by their terms, terminate or cease to have further
effectiveness as a result of the Exchange Offer.

     The Outstanding Notes that are not exchanged for Exchange Notes pursuant to
the Exchange Offer will remain restricted securities.  Accordingly, such
Outstanding Notes may be resold only (i) to the Company (upon redemption thereof
or otherwise), (ii) pursuant to an effective registration statement under the
Securities Act, (iii) so long as the Outstanding Notes are eligible for resale
pursuant to Rule 144A, to a qualified institutional buyer within the meaning of
Rule 144A under the Securities Act in a transaction meeting the requirements of
Rule 144A, (iv) outside the United States to a foreign person pursuant to the
exemption from the registration requirements of the Securities Act provided by
Regulation S thereunder, (v) to an institutional accredited investor that, prior
to such transfer, furnishes to Texas Commerce Bank National Association, as
trustee, a signed letter containing certain representations and agreements
relating to the restrictions on transfer of the Outstanding Notes evidenced
thereby (the form of which letter can be obtained from such trustee) or (vi)
pursuant to another available exemption from the registration requirements of
the Securities Act, in each case in accordance with any applicable securities
laws of any state of the United States.

     Accordingly, to the extent that Outstanding Notes are tendered and accepted
in the Exchange Offer, the trading market for the untendered Outstanding Notes
could be adversely affected.

SHELF REGISTRATION STATEMENT

     If (i) the Company is not permitted to consummate the Exchange Offer
because the Exchange Offer is not permitted by any applicable law or applicable
interpretation of the Commission or the staff of the Commission or (ii) any
holder of an Outstanding Note notifies the Company on or prior to the Exchange
Date that (A) due to a change in law or policy it is not entitled to participate
in the Exchange Offer, (B) due to a change in law or policy it may not resell
the Exchange Notes acquired by it in the Exchange Offer to the public without
delivering a prospectus and this prospectus is not appropriate or available for
such resales by such holder or (C) it is a broker-dealer that owns Outstanding
Notes (including an initial purchaser that holds Outstanding Notes as part of an
unsold allotment from the original offering of the Outstanding Notes) acquired
directly from the Company or an affiliate of the Company or (iii) any holder of
Private Exchange Notes so requests within 120 days after the consummation

                                       26
<PAGE>
 
of the Exchange Offer, the Company has agreed to file and maintain a
registration statement that would allow resales of transfer restricted
Outstanding Notes, Exchange Notes or Private Exchange Notes owned by such
holders.

OTHER

     Participation in the Exchange Offer is voluntary and holders should
carefully consider whether to accept.  Holders of the Outstanding Notes are
urged to consult their financial and tax advisors in making their own decision
on what action to take.

     The Company may in the future seek to acquire untendered Outstanding Notes
in open market or privately negotiated transactions, through subsequent exchange
offers or otherwise.  The Company has no present plans to acquire any
Outstanding Notes that are not tendered in the Exchange Offer or to file a
registration statement to permit resales of any untendered Outstanding Notes,
except for the filing, if required, of the Shelf Registration Statement.

                    CERTAIN FEDERAL INCOME TAX CONSEQUENCES

     The following discussion is based upon current provisions of the Internal
Revenue Code of 1986, as amended, applicable Treasury regulations, judicial
authority and administrative rulings and practice.  There can be no assurance
that the Internal Revenue Service (the "Service") will not take a contrary view,
and no ruling from the Service has been or will be sought.  Legislative,
judicial or administrative changes or interpretations may be forthcoming that
could alter or modify the statements and conclusions set forth herein.  Any such
changes or interpretations may or may not be retroactive and could affect the
tax consequences to Holders.  Certain Holders of the Outstanding Notes
(including insurance companies, tax exempt organizations, financial
institutions, broker-dealers, foreign corporations and persons who are not
citizens or residents of the United States) may be subject to special rules not
discussed below.  Each Holder of an Outstanding Note should consult his, her or
its own tax advisor as to the particular tax consequences of exchanging such
Holder's Outstanding Notes for Exchange Notes, including the applicability and
effect of any state, local or foreign tax laws.

     The issuance of the Exchange Notes to Holders of the Outstanding Notes
pursuant to the terms set forth in this prospectus should not constitute a
recognition event for Federal income tax purposes.  Consequently, no gain or
loss should be recognized by Holders of the Outstanding Notes upon receipt of
the Exchange Notes.  For purposes of determining gain or loss upon the
subsequent sale or exchange of the Exchange Notes, a Holder's basis in the
Exchange Notes should be the same as such Holder's basis in the Outstanding
Notes exchanged therefor.  Holders should be considered to have held the
Exchange Notes from the time of their original acquisition of the Outstanding
Notes.

     Treasury regulations relating to the tax treatment of debt instruments with
original discount contain provisions for determining the yield and maturity of
debt instruments having one or more contingencies that could result in the
acceleration or deferral of amounts due under the debt (including optional
redemption).  The Company will follow the general rule of these provisions,
which is to ignore contingencies, as it is more likely than not that payments
will be made under the Exchange Notes under the stated payment schedule, and
thus plans to accrue and report interest on the Exchange Notes under the stated
payment schedule.

                                USE OF PROCEEDS

     This Exchange Offer is intended to satisfy certain of the Company's
obligations under the Purchase Agreement and the Registration Rights Agreement.
The Company will not receive any cash proceeds from the issuance of the Exchange
Notes offered hereby.  In consideration for issuing the Exchange Notes
contemplated in this Prospectus, the Company will receive Outstanding Notes in
like principal amount, the form and terms of which are the same as the form and
terms of the Exchange Notes (which they replace), except as otherwise described
herein.  The Outstanding Notes surrendered in exchange for Exchange Notes will
be retired and canceled and cannot be reissued.  Accordingly, issuance of the
Exchange Notes will not result in any increase or decrease in the indebtedness
of the Company.

                                       27
<PAGE>
 
     The net proceeds to the Company from the sale of the Outstanding Notes were
approximately $53 million. Such proceeds were used to reduce indebtedness
outstanding under the Company's $165 million Revolving Credit Facility with six
banks.  At June 30, 1997, the Company had approximately $109.2 million
outstanding under the Revolving Credit Facility.  The Revolving Credit Facility
bears interest at either LIBOR plus 1.375% or the Base Rate, as determined by
the Company.  The "Base Rate" is defined as the higher of (i) the federal funds
rate plus 1/2% or (ii) Prime.  The average interest rate as of June 30, 1997, of
all outstanding indebtedness under the Revolving Credit Facility was
approximately 7.2%.

                                       28
<PAGE>
 
                      DESCRIPTION OF CERTAIN INDEBTEDNESS

     The Company and certain of its subsidiaries have established credit
facilities with different banks to fund working capital requirements and to
issue letters of credit and fund other obligations to support its crude oil
marketing activities.  Set forth below are summaries of such credit facilities.

REVOLVING CREDIT FACILITY

     The Company has a Revolving Credit Facility with ING (U.S.) Capital
Corporation ("ING"), as agent, BankBoston, N.A., Den norske Bank AS, Wells Fargo
Bank (Texas), National Association, Texas Commerce Bank National Association,
Comerica Bank--Texas and ING (collectively the "Lenders").  In March, 1997, the
total credit commitment and borrowing base under the Revolving Credit Facility
was increased to $165 million from $125 million.  The Revolving Credit Facility
is secured by the oil and gas properties of the Company and guaranteed by all of
the Company's subsidiaries except PMCT Inc., and such guarantees are secured by
all of the oil and natural gas properties of the subsidiaries and the stock of
all guaranteeing subsidiaries.  The Revolving Credit Facility is subject to
borrowing base availability as determined from time to time by the Lenders in
good faith, in the exercise of the Lenders' sole discretion, and in accordance
with customary practices and standards in effect from time to time for oil and
natural gas loans to borrowers similar to the Company.  Such borrowing base may
be affected from time to time by the performance of the Company's oil and
natural gas properties and changes in oil and natural gas prices.  The Company
incurs a commitment fee of 3/8% per annum on the unused portion of the borrowing
base.

     The Revolving Credit Facility, as amended, consists of a $165 million
revolving credit loan, the revolving period of which is scheduled to mature on
July 1, 1999.  The balance remaining outstanding at that time will convert to a
term loan repayable in 20 equal quarterly installments commencing on October 1,
1999, with each subsequent installment being payable on the first business day
of each January, April, July and October thereafter, and with the final
installment being payable on July 1, 2004.  The Revolving Credit Facility bears
interest at the option of the Company at (i) LIBOR plus 1.375% or (ii) the Base
Rate.  At June 30, 1997, outstanding borrowings under the Revolving Credit
Facility were approximately $109.2 million.  An additional $1 million was
reserved against the issuance of a standby letter of credit.

     The Revolving Credit Facility contains covenants which, among other things,
restrict the payment of cash dividends, limit the amount of consolidated debt,
limit the Company's ability to make certain loans and investments, and provide
that the Company must maintain a specified relationship between current assets
and current liabilities.

SERIES A/B NOTES

     In March, 1996, the Company issued $150 million in principal amount of the
Series A/B Notes, all of which was outstanding as of August 11, 1997.  The terms
of the Notes are substantially identical to the terms of the Series A/B Notes,
except that the Company is not required to make a Net Proceeds Offer (as
defined) to the holders of the Notes if Net Available Proceeds (as defined) from
an Asset Disposition (as defined) have been applied to a Series A/B Net Proceeds
Offer (as defined).  See "Description of the Notes--Certain Covenants--
Limitation on Disposition of Assets".

MARKETING FACILITY

     The Company's marketing subsidiaries have established a $90 million
Transactional Facility with BankBoston, N.A., ING, Den norske Bank AS, Comerica
Bank--Texas and Wells Fargo Bank (Texas), National Association.  The purpose of
the Transactional Facility is to provide standby letters of credit for Plains
Marketing & Transportation Inc. ("Plains Marketing") to support the purchase of
crude oil for resale and borrowings by Plains Marketing to finance crude oil
inventory that has been hedged against future price risk.  Aggregate cash
borrowings under the Transactional Facility are limited to $25 million (the
"Sublimit").  The Transactional Facility is secured by all of the assets of
Plains Marketing and is guaranteed by the Company.  The Company's guarantee is
secured by a $1.0 million standby letter of credit issued on behalf of the
Company.  At June 30, 1997, approximately $38 million in letters of credit and
$16.5 million in borrowings were outstanding under the Transactional Facility.

                                       29
<PAGE>
 
     The Transactional Facility is also utilized (subject to the Sublimit) for
standby letters of credit and borrowings by PMCT Inc. to finance crude oil
purchased in connection with operations at the Company's crude oil terminal and
storage facility in Cushing, Oklahoma.  Under the terms of the Sublimit, all
purchases of crude oil inventory financed are required to be hedged against
future price risk on terms acceptable to the lenders.  Standby letters of credit
and borrowings under the Sublimit are secured by all of the assets of PMCT Inc.
At June 30, 1997, PMCT Inc. had no letters of credit or borrowings outstanding
under the Sublimit.

     Letters of credit under the Transactional Facility are generally issued for
seventy-day periods and bear fees of 1 1/8% per annum. Borrowings incur interest
at the option of the borrower at (i) the Base Rate or (ii) LIBOR plus 1 1/2%.
All financings under the Transactional Facility, which expires in November 1997,
are at the discretion of the lenders.

OTHER

     The Company has aggregate other indebtedness of approximately $4.1 million
at June 30, 1997, of which approximately $3.6 million is classified as other
long-term debt on the Consolidated Balance Sheet as of such date.  Such
indebtedness was issued to Chevron in connection with the December 1995 purchase
of a production payment on the LA Basin Properties.  The indebtedness bears
interest at 8% payable annually, requires equal annual principal payments of
approximately $511,000 and is unsecured.

                                       30
<PAGE>
 
                       DESCRIPTION OF THE EXCHANGE NOTES

GENERAL

     The Exchange Notes will be issued as a separate series of notes under an
indenture (the "Indenture") dated as of July 21, 1997 (the "Indenture Date"),
among the Company, the Subsidiary Guarantors, and Texas Commerce Bank National
Association, as trustee (the "Trustee").  The Exchange Notes will be senior
unsecured obligations of the Company and are substantially identical (including
principal amount, interest rate, maturity and redemption rights) to the
Outstanding Notes for which they may be exchanged pursuant to this offer, except
for certain transfer restrictions and registration rights relating the
Outstanding Notes and except for certain interest provisions relating to such
rights. Under the terms of the Indenture, the covenants and events of default
will apply equally to the Exchange Notes and the Outstanding Notes, and the
Exchange Notes and the Outstanding Notes will be treated as one class for all
actions to be taken by the holders thereof and for determining their respective
rights under the Indenture. References to the Notes include the Exchange Notes,
the Outstanding Notes and the Private Placement Notes unless the context
otherwise requires.  The Outstanding Notes were issued under the Indenture on
July 23, 1997 in an aggregate principal amount of $50,000,000. The Upon the
issuance of the Exchange Notes or the effectiveness of the Exchange Offer
Registration Statement, the Indenture is will be subject to and governed by the
Trust Indenture Act of 1939, as amended (the "Trust Indenture Act").  The
following summaries of certain provisions of the Indenture and the Registration
Rights Agreement do not purport to be complete and are subject to, and are
qualified in their entirety by reference to, all of the provisions of the
Indenture and the Registration Rights Agreement, including the definition of
certain terms contained therein and those terms that are made a part of the
Indenture by reference to the Trust Indenture Act.  Copies of the form of
Indenture and Registration Rights Agreement have been filed as an exhibit to the
Registration Statement of which this Prospectus is a part.  Capitalized terms
not otherwise defined below or elsewhere in this Prospectus have the meanings
given to them in the Indenture.  The definitions of certain capitalized terms
used in the summary are set forth below under "-- Certain Definitions".

PRINCIPAL, MATURITY AND INTEREST

     The Exchange Notes will be unsecured senior subordinated general
obligations of the Company, will mature on March 15, 2006 (the "Maturity Date"),
and will be limited in aggregate principal amount to $50,000,000.  The Exchange
Notes will be issued in denominations of $1,000 and integral multiples thereof
in fully registered form. The Exchange Notes will rank on parity with the Series
A/B Notes.

     The Notes will accrue interest at the rate of 10 1/4per annum  from the
date of issuance, or from the most recent interest payment date to which
interest has been paid or duly provided for, and accrued and unpaid interest
will be payable semi-annually on March 15 and September 15 of each year,
commencing September 15, 1997. Interest on the Outstanding Notes that are
tendered in exchange for the Exchange Notes that has accrued from July 23, 1997,
the date of issuance of the Outstanding Notes, through the Exchange Date will be
payable on or before September 15, 1997. Outstanding Notes that are accepted for
exchange will be cease to accrue interest on and after the date on which
interest on the Exchange Notes will begin to accrue.  Interest will be paid to
the person in whose name the  Exchange Note is registered at the close of
business on March 1 or September 1 next preceding such interest payment date.
Interest will be computed on the basis of a 360-day year of twelve 30-day
months.  The Exchange Notes will be payable both as to principal and interest at
the office or agency of the Company maintained for such purpose within the City
and State of New York.  In addition, in the event the Exchange Notes do not
remain in book-entry form, interest may be paid, at the option of the Company,
by check mailed to the holders of the Exchange Notes ("Holders") at their
respective addresses set forth in the register of Holders.  Until otherwise
designated by the Company, the Company's office or agency in New York will be
the office or agency of the Trustee maintained for such purpose.  Any
Outstanding Notes that remain outstanding after the completion of the Exchange
Offer, together with the Exchange Notes issued in connection with the Exchange
Offer and any Private Exchange Notes, will be treated as a single class of
securities under the Indenture.

                                       31
<PAGE>
 
REDEMPTION AND REPURCHASE

     Optional Redemption.  The Exchange Notes will be redeemable at the option
of the Company in whole at any time or in part from time to time, on and after
March 15, 2001 at the following redemption prices (expressed as percentages of
the principal amount) if redeemed during the twelve-month period commencing on
March 15 of the year set forth below, plus, in each case, accrued interest
thereon to the date of redemption:

                                                   REDEMPTION
                  YEAR                               PRICE
                  ----                               -----

                  2001                              105.1250%
                  2002                              103.4167%
                  2003                              101.7083%
                  2004 and thereafter               100.0000%

     In the event of a redemption of less than all of the Notes, the Notes will
be selected for redemption by the Trustee pro rata, by lot or by any other
method that the Trustee considers fair and appropriate and, if the Exchange
Notes are listed on any securities exchange, by a method that complies with the
requirements of such exchange.  Notice of redemption will be mailed at least 30
days but not more than 60 days before the redemption date to each Holder of
Exchange Notes to be redeemed at such Holder's registered address.  On and after
the redemption date, interest will cease to accrue on Exchange Notes or portions
thereof called for redemption (unless the Company shall default in the payment
of the redemption price or accrued interest).

     In addition, at any time or from time to time prior to March 15, 1999, the
Company may redeem up to $15 million of the Notes at 110 1/4% of the principal
amount thereof, together with accrued and unpaid interest, if any, to the date
of redemption with the Net Proceeds of a Public Equity Offering; provided that,
immediately after giving effect to such redemption, at least $35 million
aggregate principal amount of the Notes remains outstanding and that such
redemption occurs within 60 days following the closing of such Public Equity
Offering.

     Offers to Purchase.  As described below, (a) upon the occurrence of a
Change of Control and a corresponding Rating Decline, the Company will be
obligated to make an offer to purchase all outstanding Notes at a purchase price
equal to 101% of the principal amount thereof, together with accrued and unpaid
interest, if any, to the date of purchase and (b) upon certain sales or other
dispositions of assets, the Company may be obligated to make offers to purchase
Notes with a portion of the Net Proceeds of such sales or other dispositions at
a purchase price equal to 100% of the principal amount thereof, together with
accrued and unpaid interest, if any, to the date of purchase.  See "--Change of
Control" and "--Certain Covenants--Limitation on Disposition of Assets".

CHANGE OF CONTROL

     Upon the occurrence of a Change of Control and a corresponding Rating
Decline, the Company shall be obligated to make an offer to purchase all of the
then outstanding Notes (a "Change of Control Offer"), and shall purchase, on a
Business Day (the "Change of Control Purchase Date") not more than 60 nor less
than 30 days following the occurrence of a Rating Decline following a Change of
Control (or, in the event the Rating Decline occurs prior to the corresponding
Change of Control not more than 60 nor less than 30 days following the
occurrence of the Change of Control), all of the then outstanding Notes validly
tendered pursuant to such Change of Control Offer, at a purchase price (the
"Change of Control Purchase Price") equal to 101% of the principal amount
thereof, plus accrued and unpaid interest, if any, to the Change of Control
Purchase Date.  The Change of Control Offer is required to remain open for at
least 20 Business Days and until the close of business  on the fifth Business
Day prior to the Change of Control Purchase Date.

     In order to effect such Change of Control Offer, the Company shall, not
later than the 30th day after the occurrence of the Rating Decline corresponding
to such Change of Control (or, in the event the Rating Decline occurs prior to
the corresponding Change of Control, not later than the 30th day following the
occurrence of the Change of Control), mail to the Trustee and to each Holder of
the Notes notice of the Change of Control Offer, which notice shall govern the
terms of the Change of Control Offer and shall state, among other things, the
procedures that Holders of the Notes must follow to accept the Change of Control
Offer.

                                       32
<PAGE>
 
     The Company, to the extent applicable and if required by law, will comply
with Sections 13 and 14 of the Exchange Act and the provisions of Regulation 14E
and any other tender offer rules under the Exchange Act and any other federal
and state securities laws, rules and regulations which may then be applicable to
any offer by the Company to purchase the Notes pursuant to the Change of Control
covenant.

     Should a Change of Control and corresponding Rating Decline occur and a
substantial amount of the Notes be presented for purchase, there can be no
assurance that the Company would have sufficient financial resources to enable
it to purchase such Notes.  In the event the Company is required to purchase
Outstanding Notes pursuant to a Change of Control Offer, the Company expects
that it would seek third party financing to the extent it does not have
available funds to meet its purchase obligations.  However, there can be no
assurance that the Company would be able to obtain such financing.  A Change of
Control would constitute an Event of Default under the Bank Credit Agreement and
permit INCC ING, as agent thereunder (in such capacity, the "Credit Facility
Agent") to terminate the commitment of the lenders under the Bank Credit
Agreement and declare all amounts outstanding thereunder to be due and payable,
and the rights of the Holders to receive the Change of Control Purchase Price or
any other amounts due on the Notes would be subordinated to the rights of the
holders of Senior Indebtedness.  If the Bank Credit Agreement were not
accelerated, the Company would nevertheless be required to obtain a consent from
the Credit Facility Agent and the lenders under the present terms of the Bank
Credit Agreement to incur any indebtedness (other than indebtedness under such
Bank Credit Agreement) to repurchase Outstanding Notes pursuant to a Change of
Control Offer.  See "--Events of Default".

     The Indenture provides that a default in the payment of the Change of
Control Purchase Price would constitute an Event of Default under the Indenture
as a remedy for which Holders would be entitled to receive the Change of Control
Purchase Price.  If such an Event of Default resulted in a default under Senior
Indebtedness, the right of the Holders of Notes to receive the Change of Control
Purchase Price (whether at a Change of Control Purchase Date or upon
acceleration) or any other amounts due on acceleration of the Notes would be
subordinated to the rights of the holders of Senior Indebtedness.

     The Change of Control provisions of the Indenture as well as the
restrictions in the Indenture on the ability of the Company and its Subsidiaries
to incur additional Indebtedness, to grant Liens on its property, to make
Restricted Payments and to make Asset Dispositions may make more difficult or
discourage a takeover of the Company, whether favored or opposed by current
management of the Company.  Consummation of any such transaction in certain
circumstances may require redemption or repurchase of the Notes, and there can
be no assurance that the Company or the acquiring party will have sufficient
financial resources to effect such redemption or repurchase.  Such restrictions
and the restrictions on transactions with Related Persons may, in certain
circumstances, make more difficult or discourage any leveraged buyout of the
Company or any of its Subsidiaries by the management of the Company.

SUBORDINATION

     The payment of the 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 Indebtedness, whether outstanding on the date of
the Indenture or thereafter created, incurred, assumed or guaranteed.  Such
subordination will not prevent the occurrence of an Event of Default, and no
payment on any Guarantee shall constitute payment "on behalf of" the Company
within the meaning of the following paragraphs; provided that a payment by a
Subsidiary Guarantor on a Guarantee shall constitute a payment "on behalf of"
the Company within the meaning of the following paragraphs in the event that any
guarantee by such Subsidiary of Indebtedness under the Bank Credit Agreement
shall have been determined by a court of competent jurisdiction to be invalid or
unenforceable, in whole or in part.

     No payment may be made by the Company or on behalf of the Company on
account of principal of or interest on the Notes or to acquire or repurchase any
of the Notes or on account of the redemption provisions of the Notes (i) upon
the maturity of any Senior Indebtedness by lapse of time, acceleration or
otherwise, unless and until all such Senior Indebtedness is first paid in full
or (ii) upon the happening of any default in payment of any

                                       33
<PAGE>
 
principal of or interest on any Senior Indebtedness when the same becomes due
and payable (a "Payment Default"), unless and until such Payment Default shall
have been cured or waived or shall have ceased to exist.

     Upon the happening of a default (other than a Payment Default) with respect
to any Senior Indebtedness, as such default or event of default is defined
therein or in the instrument or agreement under which it is outstanding, and
upon written notice thereof given to the Company and the Trustee by any holders
of such Senior Indebtedness or their representative (a "Payment Notice"), then,
unless and until such default or event of default shall have been cured or
waived or shall have ceased to exist or the representative gives its written
approval, no payment shall be made by or on behalf of the Company on account of
principal of or interest on the Notes or to acquire or repurchase any of the
Notes or on account of the redemption provisions of the Notes; provided,
however, that these provisions will not prevent the making of any payment for
more than 179 days after the due date of the first principal or interest payment
on the Notes after a Payment Notice shall have been given.  Notwithstanding the
foregoing, (i) not more than one Payment Notice shall be given within a period
of 360 consecutive days, and (ii) a Payment Notice may only be given (A) if more
than $5 million of Senior Indebtedness is outstanding under the Bank Credit
Agreement at the time of such notice, by the representative or (B) if $5 million
or less of Senior Indebtedness is outstanding under the Bank Credit Agreement at
the time of such notice, by a holder or holders (or the representative of
holders) of at least $5 million principal amount of Senior Indebtedness.

     Upon any distribution of the assets of the Company or payment on the Notes
on behalf of the Company in the event of any Insolvency or Liquidation
Proceeding with respect to the Company, the holders of Senior Indebtedness will
be entitled to receive payment in full of such Senior Indebtedness before the
Holders are entitled to receive any payment on account of the principal or
interest due with respect to the Notes.

     Because of these subordination provisions, creditors of the Company who are
holders of Senior Indebtedness may recover more, ratably, than the Holders of
the Notes.

     The subordination provisions described above will cease to be applicable to
the Notes upon any legal defeasance or covenant defeasance of the Notes as
described under "--Satisfaction and Discharge of Indenture; Defeasance".

     As of June 30, 1997, giving effect to the issuance of the Outstanding Notes
and the application of the net proceeds therefrom, the Company's total long-term
debt and stockholders' equity were $262.6 million and $103.2 million,
respectively.  In addition, as described below under "--Senior Subordinated
Guarantees of Notes", at June 30, 1997, the Subsidiary Guarantors had
outstanding Guarantor Senior Indebtedness of $16.5 million and $38.0 million
reserved pursuant to existing letters of credit.  The Company is a holding
company, and the Notes will be structurally subordinated to, and the Guarantees
will be subordinated to, Guarantor Senior Indebtedness.  The foregoing amounts
include only liabilities included on the Company's consolidated balance sheet
under GAAP; the Company and its subsidiaries have other liabilities, including
contingent liabilities, which may be significant.  Although the Indenture will
contain limitations on the amount of additional Indebtedness that the Company
and its Subsidiaries may incur, the amounts of such Indebtedness could be
substantial and, in any case, such Indebtedness may be Senior Indebtedness,
Guarantor Senior Indebtedness or Indebtedness of Unrestricted Subsidiaries (to
which the Notes will be structurally subordinated).  See "Certain Covenants --
Limitations on Incurrence of Additional Indebtedness".

SENIOR SUBORDINATED GUARANTEES OF NOTES

     The Subsidiary Guarantors, which consist of all of the Company's
subsidiaries, will unconditionally guarantee, jointly and severally, to each
Holder and the Trustee, the full and prompt performance of the Company's
obligations under the Indenture and the Notes, including the payment of
principal of and interest on the Notes.  In addition to the initial Subsidiary
Guarantors, the Company will cause each Person (other than an Unrestricted
Subsidiary) that shall become a Material Subsidiary after the Indenture Date to
execute and deliver a supplement to the Indenture pursuant to which such Person
will guarantee the payment of the Notes on the same terms and conditions as the
Guarantees by the Subsidiary Guarantors.  As described below under "Certain
Covenants -- Limitation on Incurrence of Additional Indebtedness", no Subsidiary
that is not already a Subsidiary Guarantor shall 

                                       34
<PAGE>
 
incur any Indebtedness with respect to Indebtedness of the Company or another
Subsidiary unless such Subsidiary becomes a guarantor of the Notes.

     The obligations of each Subsidiary Guarantor are limited to the maximum
amount as will, after giving effect to all other contingent and fixed
liabilities (including, but not limited to, Guarantor Senior Indebtedness of
such Subsidiary Guarantor) of such Subsidiary Guarantor and after giving effect
to any collections from or payments made by or on behalf of any other Subsidiary
Guarantor in respect of the obligations of such other Subsidiary Guarantor under
its Guarantee or pursuant to its contribution obligations under the Indenture,
result in the obligations of such Subsidiary Guarantor under the Guarantee not
constituting a fraudulent conveyance or fraudulent transfer under federal or
state law.  Each Subsidiary Guarantor that makes a payment or distribution under
a Guarantee shall be entitled to a contribution from each other Subsidiary
Guarantor in a pro rata amount based on the Adjusted Net Assets of each
Subsidiary Guarantor.

     Each Subsidiary Guarantor may consolidate with or merge into or sell or
otherwise dispose of all or substantially all of its properties and assets to
the Company or another Subsidiary Guarantor without limitation, except to the
extent any such transaction is subject to the "Merger, Consolidation and Sale of
Assets" covenant of the Indenture.  Each Subsidiary Guarantor may consolidate
with or merge into or sell all or substantially all of its properties and assets
to a Person other than the Company or another Subsidiary Guarantor (whether or
not affiliated with the Subsidiary Guarantor), provided that (a) if the
surviving Person is not the Subsidiary Guarantor, the surviving Person agrees to
assume such Subsidiary Guarantor's Guarantee and all its obligations pursuant to
the Indenture (except to the extent the following paragraph would result in the
release of such Subsidiary Guarantee) and (b) such transaction does not (i)
violate any of the covenants described below under "-- Certain Covenants" or
(ii) result in a Default or Event of Default immediately thereafter that is
continuing.

     Upon the sale or other disposition (by merger or otherwise) of a Subsidiary
Guarantor (or all or substantially all of its properties and assets) pursuant to
a transaction that is otherwise in compliance with the Indenture (including as
described in the foregoing paragraph), such Subsidiary Guarantor shall be deemed
released from its Subsidiary Guarantee and the related obligations set forth in
the Indenture; provided, however, that any such termination shall occur only to
the extent that all obligations of such Subsidiary Guarantor under all of its
guarantees of, and under all of its pledges of assets or other security
interests which secure, other Indebtedness of the Company or any Subsidiary
shall also terminate or be released upon such sale or other disposition.  Each
Subsidiary Guarantor that is designated as an Unrestricted Subsidiary in
accordance with the Indenture shall be released from its Subsidiary Guarantee
and related obligations set forth in the Indenture for so long as it remains an
Unrestricted Subsidiary.

     The Guarantees of each Subsidiary Guarantor are subordinated to the prior
payment in full of all Guarantor Senior Indebtedness of such Subsidiary
Guarantor to substantially the same extent as the Notes are subordinated to
Senior Indebtedness.  As of June 30, 1997, the Subsidiary Guarantors had
outstanding Guarantor Senior Indebtedness of $16.5 million and $38.0 million
reserved pursuant to existing letters of credit.

     Separate financial statements of the Subsidiary Guarantors are not included
herein because such Subsidiary Guarantors are jointly and severally liable with
respect to the Company's obligations pursuant to the Notes, and the aggregate
net assets, earnings and equity of the Subsidiary Guarantors are substantially
equivalent to the net assets, earnings and equity of the Company on a
consolidated basis.

CERTAIN COVENANTS

     The Indenture contains, among others, the following covenants:

  Limitation on Incurrence of Additional Indebtedness

     The Company will not, and will not permit any of the Subsidiaries directly
or indirectly, to issue, incur, assume, guarantee, become liable, contingently
or otherwise, with respect to or otherwise become responsible for the payment of
(collectively, "incur") any Indebtedness (other than  Permitted Indebtedness);
provided, however, 

                                       35
<PAGE>
 
that if no Default or Event of Default with respect to the Notes shall have
occurred and be continuing at the time or as a consequence at the incurrence of
such Indebtedness, the Company and the Subsidiaries or any of them may incur
Indebtedness if on the date of the incurrence, (i) both (A) the Company's
Consolidated EBITDA Coverage Ratio would have been greater than 2.5 to 1.0, and
(B) the Company's Adjusted Consolidated Net Tangible Assets are equal to or
greater than 150% of Indebtedness of the Company and the Subsidiaries, or (ii)
the Company's Adjusted Consolidated Net Tangible Assets are equal to or greater
than 200% of Indebtedness of the Company and the Subsidiaries.

     For purposes of determining any particular amount of Indebtedness under
this covenant, guarantees of Indebtedness otherwise included in the
determination of such amount shall not also be included.

     Notwithstanding anything to the contrary in this covenant, no Subsidiary
that is not already a Subsidiary Guarantor shall incur any Indebtedness with
respect to any Indebtedness of the Company or any other Subsidiary unless such
Subsidiary, the Company and the Trustee execute and deliver a supplemental
indenture evidencing such Subsidiary's Guarantee of the Notes, such Guarantee to
be a senior subordinated unsecured obligation of such Subsidiary.

     For purposes of determining any particular amount of Indebtedness incurred
under this covenant, any Indebtedness incurred by the Company or any Subsidiary
incurred for, or related to, a Person other than another Subsidiary or the
Company, as applicable, shall be deemed to be in an amount equal to the greater
of (i) the lesser of (A) the full amount of the Indebtedness of such other
Person or (B) the fair market value of the assets and properties of the Company
or such Subsidiary,  as to which the holder or holders of such Indebtedness are
expressly limiting the obligations of the Company or such Subsidiary, the value
of which assets and properties of the Company or any Subsidiary, will be as
determined in good faith by the Board of Directors of the Company or such
Subsidiary, as applicable (which determinations shall be evidenced by a Board
Resolution of the applicable Person), and (ii) the amount of the Indebtedness of
such other Person as has been expressly contractually assumed or guaranteed by
the Company or such Subsidiary.

  Limitation on Senior Subordinated Indebtedness

     The Company will not, directly or indirectly, issue, assume, guarantee,
incur or otherwise become liable for any Indebtedness which is both subordinate
or junior in right of payment to any Senior Indebtedness and senior or superior
in right of payment to the Notes.  The Subsidiary Guarantors will not, directly
or indirectly, issue, assume, guarantee, incur or otherwise become liable for
any Indebtedness which is both subordinate or junior in right of payment to any
Guarantor Senior Indebtedness and senior or superior in right of payment to the
Guarantees.

  Limitation on Restricted Payments

     The Company will not, and will not permit any of the Subsidiaries to,
directly or indirectly, make any Restricted Payment, if at the time of such
Restricted Payment, or on a pro forma basis after giving effect thereto:

          (x) a Default or an Event of Default under the Indenture has occurred
     and is continuing;

          (y) the aggregate amount expended for all Restricted Payments
     subsequent to the Issue Date exceeds the sum of (without duplication):

              (1)  50% of aggregate Consolidated Net Income (net of losses
      resulting from full costs ceiling write downs attributable to any oil and
      gas properties of the Company or any Subsidiary) of the Company (or if
      such Consolidated Net Income is a loss, minus 100% of such loss) earned on
      a cumulative basis during the period beginning on the Issue Date and
      ending on the last date of the Company's fiscal quarter immediately
      preceding such Restricted Payment; plus

              (2)  100% of the aggregate Net Proceeds received by the Company
      from any Person other than a Subsidiary from the issuance and sale
      subsequent to the Issue Date of Qualified Capital Stock

                                       36
<PAGE>
 
      (excluding (A) any Qualified Capital Stock paid as a dividend on any
      Capital Stock or as interest on any Indebtedness, (B) the issuance of
      Qualified Capital Stock upon the conversion of, or in exchange for, any
      Qualified Capital Stock and (C) any Qualified Capital Stock with regard to
      issuances and sales financed directly or indirectly using funds borrowed
      from the Company or any Subsidiary, until and to the extent such borrowing
      is repaid); plus

              (3)  to the extent not otherwise included in Consolidated Net
      Income, dividends, repayments of loans or advances, or other transfers of
      assets, in each case to the Company or a Subsidiary after the Issue Date
      from any Unrestricted Subsidiary or from the redesignation of an
      Unrestricted Subsidiary as a Subsidiary (valued in each case as provided
      in the definition of Investment) other than amounts constituting Permitted
      Unrestricted Subsidiary Investments; and

              (4)  $15 million; or

          (z) the Company would not be able to incur $1.00 of additional
     Indebtedness (excluding Permitted Indebtedness) as provided in the first
     paragraph of "--Limitation on Incurrence of Additional Indebtedness"."

     The foregoing provisions of this covenant will not prevent the payment of
any dividend within 60 days after the date of its declaration if the dividend
would have been permitted on the date of declaration; provided, however,
payments made in accordance with this paragraph shall be counted for purposes of
computing amounts expended pursuant to subclause (y) in the immediately
preceding paragraph.

  Limitation on Disposition of Assets

     The Company will not, and will not permit any Subsidiary to, make any Asset
Disposition unless:

          (i)   in the case of any Asset Disposition or series of related Asset
     Dispositions having a fair market value of more than $10 million, the
     Company or such Subsidiary receives consideration at the time of such Asset
     Disposition at least equal to the fair market value, the determination of
     which, including the value of all non-cash consideration, must be approved
     in good faith by the Board of Directors of the Company and such Subsidiary,
     if any,

          (ii)  the proceeds from any Asset Disposition (other than any Asset
     Disposition or series of related Asset Dispositions that have a value of
     less than $1 million) consist of cash and cash equivalents or Permitted
     Industry Investments or any combination of the foregoing; provided that the
     Company or such Subsidiary may accept proceeds from such Asset Disposition
     in other than cash and cash equivalents or Permitted Industry Investments
     or any combination of the foregoing if the aggregate amount of all proceeds
     from all Asset Dispositions after the Issue Date, that are other than cash
     and cash equivalents or Permitted Industry Investments after such Asset
     Disposition, does not exceed 15% of Adjusted Consolidated Net Tangible
     Assets at the date of such Asset Disposition,

          (iii) within 365 days following the receipt of the Net Available
     Proceeds from such Asset Disposition, 100% of the Net Available Proceeds
     from such Asset Disposition are applied by the Company or such Subsidiary:

                (a) to the payment of Indebtedness under the Bank Credit
          Agreement and the payment of any other Senior Indebtedness;

                (b) at the Company's option to the extent that such Net
          Available Proceeds are not applied to Senior Indebtedness, to
          Permitted Industry Investments made by the Company or a Subsidiary
          (or, to the extent not so applied during such 365 day period, to
          Permitted Industry Investments specifically identified during such 365
          day period reasonably anticipated in good faith by the Board of
          Directors 

                                       37
<PAGE>
 
          of the Company to be expended within 180 days after being specifically
          identified (such 180-day period, the "Project Period")); and

                (c) to the extent that any Net Available Proceeds are not
          applied to Senior Indebtedness or applied or to be applied to
          Permitted Industry Investments, to make an offer to purchase (the
          ""Series A/B Net Proceeds Offer") (on a business day (the ""Series A/B
          Net Proceeds Payment Date") not later than the later of (1) 365 days
          following the receipt of such Net Available Proceeds or (2) in the
          case of application of proceeds intended to be applied under clause
          (b), 35 business days following any Project Period) the Series A/B
          Notes at a price equal to 100% of the principal amount of the Series
          A/B Notes plus accrued interest to the Series A/B Net Proceeds Payment
          Date, and

          (iv)  to the extent that any Net Available Proceeds are not applied to
     Senior Indebtedness or applied or to be applied to Permitted Industry
     Investments or to a Series A/B Net Proceeds Offer, to make an offer to
     purchase (the "Net Proceeds Offer") (on a business day (the "Net Proceeds
     Payment Date") not later than 90 business days following the Series A/B Net
     Proceeds Payment Date) the Notes at a price equal to 100% of the principal
     amount of the Notes plus accrued interest to the Net Proceeds Payment Date.

     Notwithstanding the foregoing, the Company and its Subsidiaries will not be
required to apply any Net Available Proceeds in accordance with such provisions
except to the extent that the Net Available Proceeds from all Asset Dispositions
which are not applied in accordance with such provisions exceed $5 million.
 
     Notice of a Net Proceeds Offer to purchase the Notes will be made on behalf
of the Company not less than 25 business days nor more than 60 business days
before the Net Proceeds Payment Date.  Notes tendered to the Company pursuant to
a Net Proceeds Offer will cease to accrue interest after the Net Proceeds
Payment Date.  The Company will not be entitled to any credit against the above
obligations for the principal amount of Notes previously acquired by the
Company.  For purposes of this covenant, the term "Net Proceeds Offer Amount"
means the principal of outstanding Notes in an aggregate principal amount equal
to any remaining Net Available Proceeds.

     On the Net Proceeds Payment Date, the Company will (i) accept for payment
Notes or portions thereof tendered pursuant to the Net Proceeds Offer in an
aggregate principal amount equal to the Net Proceeds Offer Amount or such lesser
amount of Notes as has been tendered, (ii) deposit with the paying agent money
sufficient to pay the purchase price of all Notes or portions thereof so
tendered in an aggregate principal amount equal to the Net Proceeds Offer Amount
or such lesser amount, and (iii) deliver or cause to be delivered to the
Trustee, Notes so accepted together with an officers' certificate stating the
Notes or portions thereof tendered to the Company.  If the aggregate principal
amount of Notes tendered exceeds the Net Proceeds Offer Amount, the Trustee will
select the Notes to be purchased on a pro rata basis based on the principal
amount of Notes so tendered.  The paying agent will promptly mail or deliver to
Holders of the Notes so accepted payment in an amount equal to the purchase
price, and the Company will execute, and the Trustee will promptly authenticate
and mail or make available for delivery to such Holders, a new Note equal in
principal amount to any unpurchased portion of the Note surrendered.  Any Notes
not so accepted will be promptly mailed or delivered to the Holder thereof.  The
Company will publicly announce the results of the Net Proceeds Offer on or as
soon as practicable after the Net Proceeds Payment Date.  For purposes of this
covenant, the Trustee or its agent will act as the paying agent.  The Company
may make Asset Dispositions in accordance with this covenant and receive
consideration in the form of equity, partnership or other ownership interests
where it might not control such resulting entity.

     The Company's ability to repurchase Notes in a Net Proceeds Offer is
restricted by the terms of the Bank Credit Agreement and may be prohibited or
otherwise limited by the terms of any then existing borrowing arrangements and
by its financial resources.

  Limitation on Liens Securing Indebtedness

     The Company will not, and will not permit any of the Subsidiaries to,
create, incur, assume or suffer to exist any Liens (other than Permitted Liens)
upon any of their respective Properties securing (i) any Indebtedness of the
Company, unless the Notes are equally and ratably secured or (ii) any
Indebtedness of any Subsidiary Guarantor, 

                                       38
<PAGE>
 
unless the Notes or the Guarantees are equally and ratably secured; provided
that if such Indebtedness is expressly subordinated to the Notes or the
Guarantees, the Lien securing such Indebtedness will be subordinated and junior
to the Lien securing the Notes or the Guarantees, with the same relative
priority as such Subordinated Indebtedness will have with respect to the Notes
or the Guarantees, as the case may be.

  Limitation on Payment Restrictions Affecting Subsidiaries

     The Company will not, and will not permit any Subsidiary to, directly or
indirectly, create or suffer to exist or allow to become effective any
consensual encumbrance or restriction of any kind (i) on the ability of any of
the Subsidiaries (a) to pay dividends or make other distributions on its Capital
Stock or make payments on any Indebtedness owed to the Company or any other
Subsidiary, (b) to make loans or advances to the Company or any other
Subsidiary, or (c) to transfer any of its Property to the Company or any other
Subsidiary; or (ii) on the ability of such Person or any other subsidiary of
such Person to receive or retain any such (a) dividends, distributions or
payments, (b) loans or advances, or (c) transfers of Property (any such
restriction being referred to herein as a "Payment Restriction"), except for
such encumbrances or restrictions existing under or by reason of (A) the Bank
Credit Agreement as in effect on the Issue Date, (B) customary provisions
restricting subletting or assignment of any lease governing a leasehold interest
of the Company or any Subsidiary, (C) any instrument governing Indebtedness of a
Person acquired by the Company or a Subsidiary at the time of such acquisition,
which encumbrance or restriction is not applicable to any Person, other than the
Person, or the Property of the Person, so acquired, provided that such
Indebtedness was not incurred in anticipation of such acquisition, (D) with
respect to clauses (i)(c) and (ii)(c) above, Purchase Money Obligations for
Property acquired in the ordinary course of business, (E) Indebtedness existing
pursuant to a written agreement in effect on the Issue Date, (F) Indebtedness
under the Series A/B Indenture, or (G) Indebtedness under the Indenture or (H)
Indebtedness incurred to refinance, refund, extend or renew Indebtedness
referred to in clauses A, C, D, E,  F or F G above, provided that the Payment
Restrictions contained therein are not materially more restrictive than those
provided for in the Indebtedness being refinanced, refunded, extended or
renewed.

  Limitation on Transactions with Related Persons

     Neither the Company nor any of the Subsidiaries will (i) sell, lease,
transfer or otherwise dispose of any of its Property to, (ii) purchase any
property from, (iii) make any Investment (other than Permitted Unrestricted
Subsidiary Investments and other Investments that do not breach the covenant
described under the caption "--Limitation on Restricted Payments") in, or (iv)
enter into any contract or agreement with or for the benefit of, a Related
Person of the Company or any Subsidiary (other than the Company or any such
Subsidiary in which no Related Person (other than the Company or another Wholly
Owned Subsidiary) owns, directly or indirectly, an equity interest) (a "Related
Person Transaction"), other than Related Person Transactions which are on terms
(which terms are in writing) no less favorable to the Company or a Subsidiary,
as applicable, than could be obtained in a comparable arm's length transaction
from an unaffiliated party; provided that, if the Company or any Subsidiary
enters into a Related Person Transaction or series of Related Person
Transactions involving or having an aggregate value of more than $5 million,
such Related Person Transaction will have been approved by a majority of the
independent directors of the Company.  Notwithstanding anything to the contrary
in the foregoing, the foregoing restrictions shall not apply to (i) Related
Person Transactions that are approved by the Board of Directors of the Company
and such Subsidiary, if applicable, as in the best interests of the Company or
such Subsidiary, which transactions together with all other Related Person
Transactions in a related series involve or have an aggregate value not
exceeding $1 million in each fiscal year; (ii) fees and compensation paid to or
agreements with officers, directors, employees or consultants of the Company or
any Subsidiary in each case that are reasonable, as determined by the Board of
Directors or senior management thereof in good faith; and (iii) Restricted
Payments that are not prohibited by the "Limitation on Restricted Payments"
covenant.

  Limitation on Conduct of Business

     The Company and the Subsidiaries will be operated in a manner such that
their business activities will be the oil and gas business, including the
exploration for and the development, acquisition, production, processing,
marketing, storage and transportation of, Hydrocarbons and other related energy
and natural resources businesses, 

                                       39
<PAGE>
 
and such other businesses as are reasonably necessary or desirable to facilitate
the conduct and operations of the foregoing businesses.

 Reports

     The Company will file on a timely basis with the Commission, to the extent
such filings are accepted by the Commission and whether or not the Company has a
class of securities registered under the Exchange Act, the  annual reports,
quarterly reports and other documents that the Company would be required to file
if it were subject to Section 13 or 15 of the Exchange Act.  The Company will
also be required (a) to file with the Trustee (with exhibits), and provide to
each Holder of Notes (without exhibits), without cost to such Holder, copies of
such reports and documents within 15 days after the date on which the Company
files such reports and documents with the Commission or the date on which the
Company would be required to file such reports and documents if the Company were
so required and (b) if filing such reports and documents with the Commission is
not accepted by the Commission or is prohibited under the Exchange Act, to
supply at its cost copies of such reports and documents (including any exhibits
thereto) to any Holder of Notes promptly upon written request.

  Future Designation of Restricted and Unrestricted Subsidiaries

     The foregoing covenants (including calculation of financial ratios and the
determination of limitations on the incurrence of Indebtedness and Liens) may be
affected by the designation by the Company of any existing or future Subsidiary
of the Company as an Unrestricted Subsidiary.  The definition of "Unrestricted
Subsidiary" set forth under the caption "--Certain Definitions" describes the
circumstances under which a Subsidiary of the Company may be designated as an
Unrestricted Subsidiary by the Board of Directors of the Company.

MERGER, CONSOLIDATION OR SALE OF SUBSTANTIALLY ALL ASSETS

     The Company will not consolidate with or merge with any other Person or
convey, transfer or lease all or substantially all of its Property to any
Person, unless: (i) the Company survives such merger or the Person formed by
such consolidation or into which the Company is merged or that acquires by
conveyance or transfer, or which leases, all or substantially all of the
Property of the Company is a corporation organized and existing under the laws
of the United States of America or any State thereof or the District of Columbia
and expressly assumes, by supplemental indenture, the due and punctual payment
of the principal of (and premium, if any) and interest on all the Notes and the
performance of every other covenant and obligation of the Company under the
Indenture; (ii) immediately before and after giving effect to such transaction,
no Default or Event of Default exists; (iii) immediately after giving effect to
such transaction on a pro forma basis, the Consolidated Net Worth of the Company
(or the surviving entity if the Company is not continuing) is equal to or
greater than the Consolidated Net Worth of the Company immediately before such
transaction and (iv) immediately after giving effect to such transaction on a
pro forma basis, the Company (or the surviving entity if the Company is not
continuing) would be able to incur $1.00 of additional Indebtedness (excluding
Permitted Indebtedness) under the tests described in the first paragraph of
"Limitation on Incurrence of Additional Indebtedness".  Upon any such
consolidation, merger, conveyance, lease or transfer in accordance with the
foregoing, the successor Person formed by such consolidation or into which the
Company is merged or to which such conveyance, lease or transfer is made will
succeed to, and be substituted for, and may exercise every right and power of,
the Company under the Indenture with the same effect as if such successor had
been named as the Company therein, and thereafter (except in the case of a
lease) the predecessor corporation will be relieved of all further obligations
and covenants under the Indenture and the Notes.

EVENTS OF DEFAULT

     The following will constitute Events of Default under the Indenture:

          (i)   default in the payment of principal of, or premium, if any, on,
     the Notes when due at maturity, upon repurchase, upon acceleration or
     otherwise, including failure of the Company to repurchase the Notes

                                       40
<PAGE>
 
     required to be repurchased upon a Change of Control and corresponding
     Rating Decline or a Net Proceeds Offer and failure to make any optional
     redemption payment;

          (ii)  default in the payment of any installment of interest on the
     Notes when due (including any interest payable in connection with optional
     redemption payment) and continuance of such default for 30 days;

          (iii) default on any other Indebtedness of the Company, any Subsidiary
     Guarantor or any other Subsidiary if either (a) such default results from
     the failure to pay principal of, premium, if any, or interest on any such
     Indebtedness when due in excess of $5 million and continuance of such
     default beyond any applicable cure, forbearance or notice period, or (b) as
     a result of such default, the maturity of such Indebtedness has been
     accelerated prior to its scheduled maturity, without such default and
     acceleration having been rescinded or annulled within a period of 10 days,
     and the principal amount of such Indebtedness, together with the principal
     amount of any other such indebtedness in default, or the maturity of which
     has been so accelerated, aggregates $5 million or more;

          (iv)  default in the performance, or breach, of any other covenant of
     the Company or any Subsidiary Guarantor in the Indenture and failure to
     remedy such default within a period of 60 days after written notice thereof
     from the Trustee or Holders of 25% in principal amount of the outstanding
     Notes;

          (v)   the entry by a court of one or more judgments or orders against
     the Company, any Subsidiary Guarantor or any other Subsidiary in an
     aggregate amount in excess of $10 million and which are not covered by
     insurance written by third parties that has not been vacated, discharged,
     satisfied or stayed pending appeal within 60 days from the entry thereof;

          (vi)  certain events of bankruptcy, insolvency or reorganization in
     respect of the Company or any Material Subsidiary; or

          (vii) a Guarantee by a Subsidiary Guarantor that is a Material
     Subsidiary shall cease to be in full force and effect (other than a release
     of a Guarantee by designation of a Subsidiary Guarantor as an Unrestricted
     Subsidiary) or any Subsidiary Guarantor shall deny or disaffirm its
     obligations with respect thereto.

     If any Event of Default (other than an Event of Default specified in clause
(vi) above) occurs and is continuing, then and in every such case the Trustee or
the Holders of not less than 25% in principal amount of the Notes then
outstanding may declare the unpaid principal of, and accrued and unpaid interest
on, all the Notes, then outstanding to be due and payable, by a notice in
writing to the Company (and to the Trustee, if given by Holders) and upon any
such declaration such principal amount, premium, if any, and accrued and unpaid
interest shall become immediately due and payable, notwithstanding anything
contained in the Indenture or the Notes to the contrary.  If an Event of Default
specified in clause (vi) above occurs, all unpaid principal of, premium, if any,
and accrued interest on, the Notes then outstanding will become due and payable,
without any declaration or other act on the part of the Trustee or any Holder.

     The Holders of a majority in principal amount of the outstanding Notes, by
written notice to the Company, the Subsidiary Guarantors and the Trustee, may
rescind and annul a declaration of acceleration and its consequences if (1) the
Company or any Subsidiary Guarantor has paid or deposited with such Trustee a
sum sufficient to pay (A) all overdue installments of interest on all the Notes,
(B) the principal of, and premium, if any, on, any Notes that have become due
otherwise than by such declaration of acceleration and interest thereon at the
rate or rates prescribed therefor in the Notes, (C) to the extent that payment
of such interest is lawful, interest on the defaulted interest at the rate or
rates prescribed therefor in the Notes, and (D) all money paid or advanced by
the Trustee thereunder and the reasonable compensation, expenses, disbursements
and advances of the Trustee, its agents and counsel; (2) all Events of Default,
other than the non-payment of the principal of any Notes that have become due
solely by such declaration of acceleration, have been cured or waived as
provided in the Indenture; and (3) the rescission would not conflict with any
judgment or decree of a court of competent jurisdiction. No such rescission will
affect any subsequent Event of Default or impair any right consequent thereon.

                                       41
<PAGE>
 
     No Holder of any of the Notes will have any right to institute any
proceeding, judicial or otherwise, or for the appointment of a receiver or
trustee or pursue any remedy under the Indenture, unless (1) such Holder has
previously given notice to the Trustee of a continuing Event of Default, (2) the
Holders of not less than 25% in principal amount of the outstanding Notes have
made written request to such Trustee to institute proceedings in respect of such
Event of Default in its own name as Trustee under the Indenture, (3) such
Holder or Holders have offered to such Trustee reasonable indemnity against the
costs, expenses and liabilities to be incurred in compliance with such request,
(4) such Trustee for 30 days after its receipt of such notice, request and offer
of indemnity has failed to institute any such proceeding, and (5) no direction
inconsistent with such written request has been given to such Trustee during
such 30-day period by the Holders of a majority in principal amount of the
outstanding Notes.

     The Holder of any Note will have the right, which is absolute and
unconditional, to receive payment of the principal of, premium, if any, and
interest on such Note on the stated maturity therefor and to institute suit for
the enforcement of any such payment, and such right may not be impaired without
the consent of such Holder.

     The Holders of a majority in principal amount of the Notes will have the
right to direct the time, method and place of conducting any proceeding for any
remedy available to the Trustee or exercising any trust or power conferred on
such Trustee, provided that (1) such direction is not in conflict with any rule
of law or with the Indenture and (2) the Trustee may take any other action
deemed proper by such Trustee that is not inconsistent with such direction.

MODIFICATIONS AND WAIVERS

     The Indenture may be amended or rights thereunder may be waived with the
consent of the Company, the Subsidiary Guarantors, and the Holders of at least a
majority of the principal amount of Notes then outstanding, provided that,
without the consent of each Holder of Notes affected thereby, no such
modification or waiver will be made with regard to:  (i) a default in the
payment of principal, premium (if any) or interest on the Notes; (ii) a
reduction of the interest rate on or principal amount of the Notes, an extension
of the maturity schedule of the Notes, or a modification of the redemption or
repurchase provisions of the Notes; (iii) a change that adversely affects
subordination rights; (iv) a change in the currency in which the Notes are
payable; or (v) a change in the percentage required by this provision.

SATISFACTION AND DISCHARGE OF INDENTURE; DEFEASANCE

     The Company may at any time terminate its Obligations under the Notes and
the Indenture, and the Subsidiary Guarantors may, at such times, terminate their
corresponding obligations under the Subsidiary Guarantees and the Indenture,
with certain exceptions specified in the Indenture, by irrevocably depositing in
trust cash or obligations of the United States government and its agencies for
payment of principal of, and interest on, the Notes to redemption or maturity,
subject to the satisfaction of certain conditions.

     Subject to the conditions described below, at the Company's option, either
(a) the Company and the Subsidiary Guarantors will be deemed to have been
discharged from their obligations with respect to the Notes and Subsidiary
Guarantees and the provisions of the Indenture on the 91st day after the
applicable conditions set forth below have been satisfied or (b) the Company and
the Subsidiary Guarantors will cease to be under any obligation to comply with
certain restrictive covenants, including those described under "--Certain
Covenants"," at any time after the applicable conditions set forth below have
been satisfied:  (1) the Company or any Subsidiary Guarantor has deposited or
caused to be deposited irrevocably with the Trustee as trust funds in trust,
specifically pledged as security for, and dedicated solely to, the benefit of
the Holders (i) money or (ii) United States government obligations, which
through the payment of interest and principal in respect thereof in accordance
with their terms will provide (without any reinvestment of such interest or
principal), not later than one day before the due date of any payment, money or
(iii) a combination of (i) and (ii), in an amount sufficient, in the opinion
(with respect to (ii) and (iii)) of a nationally recognized firm of independent
public accountants expressed in a written certification thereof delivered to the
Trustee at or prior to the time of such deposit, to pay and discharge each
installment of principal of, premium, if any, and interest on, the outstanding
Notes on the dates such installments are due; (2) no

                                       42
<PAGE>
 
Default or Event of Default has occurred or is continuing on the date of such
deposit or will occur as a result of such deposit and such deposit will not
result in a breach or violation of, or constitute a default under, any other
instrument to which the Company or a Subsidiary Guarantor or any Subsidiary is a
party or by which any of them is bound, as evidenced to the Trustee in an
officers' certificate delivered to the Trustee concurrently with such deposit;
(3) the Company has delivered to the Trustee an opinion of counsel (which
counsel may be an employee of the Company) to the effect that Holders will not
recognize income, gain or loss for federal income tax purposes as a result of
the Company's exercise of its option described above and will be subject to
federal income tax on the same amount and in the same manner and at the same
time as would have been the case if such option had not been exercised, and, in
the case of the Notes being discharged pursuant to clause (a) above, accompanied
by a ruling to the effect received from or published by the Internal Revenue
Service (it being understood that (A) such opinion will also state, if
applicable, that such ruling is consistent with the conclusions reached in such
opinion and (B) the Trustee will be under no obligation to investigate the basis
of correctness of such ruling); (4) the Company has delivered to the Trustee an
opinion of counsel (which counsel may be an employee of the Company) to the
effect that the Company's exercise of its option described above will not result
in any of the Company, the Trustee or the trust created by the Company's deposit
of funds hereunder becoming or being deemed to be an "investment company" under
the Investment Company Act of 1940, as amended; (5) the Company or any
Subsidiary Guarantor has paid or duly provided for payment of all amounts then
due to the Trustee pursuant to the terms of the Indenture; and (6) the Company
has delivered to the Trustee an officers' certificate and an opinion of counsel
(which counsel may be an employee of the Company), each stating that all
conditions precedent provided for in the Indenture relating to the satisfaction
and discharge of the Indenture have been complied with.

     The Company or any Subsidiary Guarantor may make an irrevocable deposit
pursuant to this provision only if at such time it is not prohibited from doing
so under the subordination provisions of the Indenture and the Company has
delivered to the Trustee and any relevant paying agent an officer's certificate
to that effect.

REGISTRATION RIGHTS AGREEMENT; PENALTY INTEREST

     If (i) the Company is not permitted to consummate the Exchange Offer
because the Exchange Offer is not permitted by any applicable law or applicable
interpretation of the Commission or the staff of the Commission or (ii) any
holder of a Note notifies the Company on or prior to the Exchange Date that (A)
due to a change in law or policy it is not entitled to participate in the
Exchange Offer, (B) due to a change in law or policy it may not resell the
Exchange Notes acquired by it in the Exchange Offer to the public without
delivering a prospectus and the Prospectus contained in the Exchange
Registration Statement is not appropriate or available for such resales by such
holder or (C) it is a broker-dealer that owns Notes (including the Initial
Purchaser that holds Notes as part of an unsold allotment from the original
offering of the Notes) acquired directly from an Issuer or an Affiliate of an
Issuer or (iii) any holder of Private Exchange Notes so requests within 120 days
after the consummation of the Private Exchange (each such event referred to in
clauses (i) through (iii), a "Shelf Filing Event"), the Company shall cause to
be filed with the Commission pursuant to Rule 415 a shelf registration statement
(the "Shelf Registration Statement") on or prior to the later of (x) September
21, 1997 and (y) 30 days after the occurrence of such Shelf Filing Event,
relating to all Transfer Restricted Securities (the "Shelf Registration") the
holders of which have provided the information required by the Registration
Rights Agreement, and shall use their best efforts to have the Shelf
Registration Statement declared effective by the Commission on or prior to 90
days after the occurrence of such Shelf Filing Event, provided that if the
Company has not consummated the Exchange Offer by January 19, 1998, then the
Company shall cause the Shelf Registration Statement to be filed with the
Commission on or prior to January 20, 1998 and shall use its best efforts to
have the Shelf Registration Statement declared effective by the Commission
within 60 days of the date of filing thereof. In such circumstances, the Company
shall use its best efforts to keep the Shelf Registration Statement continuously
effective under the Securities Act, until (A) July 23, 2000, (subject to
extension under certain circumstances) or (B) if sooner, the date immediately
following the date that all Transfer Restricted Securities covered by the Shelf
Registration Statement have been sold pursuant thereto (the "Effectiveness
Period"); provided, however, that the Effectiveness Period shall be extended to
the extent required to permit dealers to comply with the applicable prospectus
delivery requirements of Rule 174 under the Securities Act in the Registration
Rights Agreement.

   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,

                                       43
<PAGE>
 
within 30 days after receipt of a request therefor, such information as the
Company may reasonably request 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 Additional Interest (as
defined) unless and until such holder shall have provided all such reasonably
requested information. Each holder of Transfer Restricted Securities as to which
any Shelf Registration Statement is being effected agrees to furnish promptly to
the Company all information required to be disclosed in order to make the
information previously furnished to the Company by such holder not materially
misleading.

     In the event that (i) the applicable Registration Statement is not filed
with the Commission on or prior to the date specified for such filing, (ii) the
applicable Registration Statement has not been declared effective by the
Commission on or prior to the date specified for such effectiveness after such
obligation arises, (iii) if the Exchange Offer is required to be consummated
under the Registration Rights Agreement, the Company has not exchanged Exchange
Notes for all Notes validly tendered and not validly withdrawn in accordance
with the terms of the Exchange Offer by the Consummation Date or (iv) the
applicable Registration Statement is filed and declared effective but shall
thereafter cease to be effective without being succeeded immediately by any
additional Registration Statement covering the Notes, the Exchange Notes or the
Private Exchange Notes, as the case may be, which has been filed and declared
effective (each such event referred to in clauses (i) through (iv), a
"Registration Default"), then the interest rate on Transfer Restricted
Securities will increase ("Additional Interest"), with respect to the first 
90-day period immediately following the occurrence of such Registration Default,
by 0.50% per annum and will increase by an additional 0.50% per annum with
respect to each subsequent 90-day period until all Registration Defaults have
been cured, up to a maximum amount of 2% per annum with respect to all
Registration Defaults. Following the cure of a Registration Default, the accrual
of Additional Interest with respect to such Registration Default will cease and
upon the cure of all Registration Defaults the interest rate will revert to the
original rate.

     The Company shall notify the Trustee and paying agent under the Indenture
immediately upon the happening of each and every Registration Default. The
Company shall pay the Additional interest due on the Transfer Restricted
Securities by depositing with the paying agent (which shall not be the Company
for these purposes) for the Transfer Restricted Securities, in trust, for the
benefit of the holders thereof, prior to 11:00 A.M. on the next interest payment
date specified by the Indenture (or such other indenture), sums sufficient to
pay the Additional Interest then due. The Additional Interest due shall be
payable on each interest payment date specified by the Indenture (or such other
indenture) to the record holder entitled to receive the interest payment to be
made on such date. Each obligation to pay Additional Interest shall be deemed to
accrue from and including the date of the applicable Registration Default.

GOVERNING LAW

     The Indenture provides that it is governed by, and construed in accordance
with, the laws of the State of New York but without giving effect to applicable
principles of conflicts of law to the extent that the application of the law of
another jurisdiction would be required thereby.

THE TRUSTEE

     Texas Commerce Bank National Association ("TCB") is the Trustee under the
Indenture and has been appointed by the Company as initial Registrar and paying
agent with respect to the Notes.  TCB is also the Trustee under the Indenture
for the Series A/B Notes.

     The Indenture provides that, except during the continuance of an Event of
Default, the Trustee need perform only those duties that are specifically set
forth (or incorporated by reference) in the Indenture and no others.  During the
existence of an Event of Default, the Trustee will exercise such rights and
powers vested in it by the Indenture, and use the same degree of care and skill
in such exercise as a prudent person would exercise or use under the
circumstances in the conduct of such person's own affairs.

                                       44
<PAGE>
 
     The Indenture contains certain limitations on the rights of the Trustee,
should it become a creditor of the Company, to obtain payments of claims in
certain cases or to realize on certain property received in respect of any such
claims as security or otherwise.

BOOK ENTRY; DELIVERY AND FORM

     Except as described in the next paragraph, the Exchange Notes initially
will be represented by a single, permanent global certificate in definitive,
fully registered form (the "Global Exchange Note"). The Global Exchange Note
will be deposited on the Exchange Date with, or on behalf of, DTC and registered
in the name of a nominee of DTC.

  The Global Exchange Note

     The Company expects that pursuant to procedures established by DTC (i) upon
the issuance of the Global Exchange Note, DTC or its custodian will credit, on
its internal system, the principal amount of Exchange Notes of the individual
beneficial interests represented by such Global Exchange Note to the respective
accounts of exchanging Holders who have accounts with DTC and (ii) ownership of
beneficial interests in the Global  Exchange Note will be shown on, and the
transfer of such ownership will be effected only through, records maintained by
DTC or its nominee (with respect to interests of participants) and the records
of participants (with respect to interests of persons other than participants).
Ownership of beneficial interests in the Global  Exchange Note will be limited
to persons who have accounts with DTC ("participants") or persons who invest
through participants.  Qualified Institutional Buyers will hold their interests
in the Global Exchange Note directly through DTC, if they are participants in
such system, or indirectly through organizations which are participants in such
system.

     So long as DTC or its nominee is the registered owner or holder of the
Exchange Notes, DTC or such nominee, as the case may be, will be considered the
sole owner or holder of the  Exchange Notes represented by such Global Exchange
Note for all purposes under the Indenture.  No beneficial owners of an interest
in any Global Exchange Note will be able to transfer that interest except in
accordance with DTC's procedures in addition to those provided for under the
Indenture.

     Payment on the Global Exchange Note will be made to DTC or its nominee, as
the case may be, as the registered owner thereof.  None of the Company, the
Trustee or any paying agent of the Company will have any responsibility or
liability for any aspect of the records relating to or payments made on account
of beneficial ownership interests in the Global Exchange Note or for
maintaining, supervising or reviewing any records relating to such beneficial
ownership interests.

     The Company expects that DTC or its nominee, upon receipt of any payment of
principal, premium, if any, or interest in respect of the Global Exchange Note,
will credit participants' accounts with payments in amounts proportionate to
their respective beneficial interests in the principal amount of the Global
Exchange Note as shown on the records of DTC or its nominee.  The Company also
expects that payments by participants to owners of beneficial interests in the
Global Exchange Note held through such participants will be governed by standing
instructions and customary practice, as is now the case with securities held for
the accounts of customers registered in the names of nominees for such
customers.  Such payments will be the responsibility of such participants.

     Transfers between participants in DTC will be effected in the ordinary way
in accordance with DTC rules and will be settled in immediately available funds.
If a holder requires physical delivery of Exchange Notes in registered
certificated form ("Certificated Securities") for any reason, including to sell
Exchange Notes to persons in states which require physical delivery of the
Certificated Securities, or to pledge such Certificated Securities, such holder
must transfer its interest in the Global Exchange Note in accordance with the
normal procedures of DTC and with the procedures set forth in the Indenture.

     DTC has advised the Company that it will take any action permitted to be
taken by a holder of Outstanding Notes (including the presentation of
Outstanding Notes for exchange pursuant to the Exchange Offer) only at the
direction of one or more participants to whose account the interests in the
Outstanding Global Note are credited and 

                                       45
<PAGE>
 
only in respect of such portion of the aggregate principal amount of Outstanding
Notes as to which such participant or participants have given such direction.
However, if there is an Event of Default under the Indenture, DTC will exchange
the Global Exchange Note for Certificated Securities, which it will distribute
to its participants.

     DTC has advised the Company as follows:  DTC is a limited purpose trust
company organized under laws of the State of New York, a member of the Federal
Reserve System, a "clearing corporation" within the meaning of the Uniform
Commercial Code and a "clearing agency" registered pursuant to the provisions of
Section 17A of the Exchange Act.  DTC was created to hold securities for its
participants and facilitate the clearance and settlement of securities
transactions between participants through electronic book -entry changes in
accounts of its participants, thereby eliminating the need for physical movement
of certificates.  Participants include securities brokers and dealers, banks,
trust companies and clearing corporations and certain other organizations.
Indirect access to the DTC system is available to others such as banks, brokers,
dealers and trust companies that clear through or maintain a custodial
relationship with a participant, either directly or indirectly.

     Although DTC has agreed to the foregoing procedures in order to facilitate
transfers of interests in the Global Exchange Note among participants of DTC, it
is under no obligation to perform such procedures, and such procedures may be
discontinued at any time.  None of the Company, the Initial Purchaser or the
Trustee will have any responsibility for the performance by DTC or its
participants or indirect participants of their respective obligations under the
rules and procedures governing their operations.

  Certificated Securities

     If DTC is at any time unwilling or unable to continue as a depositary for
the Global Exchange Note and a successor depositary is not appointed by the
Company within 90 days, or at the Company's election at any time, Certificated
Securities will be issued in exchange for the Global Exchange Note.

CERTAIN DEFINITIONS

     "Adjusted Consolidated Net Tangible Assets" means (without duplication), as
of the date of determination, (A) the sum of (i) discounted future net cash
flows from proved oil and gas reserves of the Company and its consolidated
Subsidiaries, calculated in accordance with Commission guidelines (before any
state or federal income tax), as estimated by independent petroleum engineers as
of a date no earlier than the date of the Company's latest annual consolidated
financial statements (or, in the case that the date of determination is after
the end of the first fiscal quarter of the fiscal year of the Company, as
estimated by Company engineers as of a date no earlier than the end of the most
recent fiscal quarter, which estimates shall be confirmed in writing by a report
by independent petroleum engineers in accordance with Commission guidelines in
the event of a Material Change if the amount of Adjusted Consolidated Net
Tangible Assets is required to be computed under the Indenture), (ii) the Net
Working Capital on a date no earlier than the date of the Company's latest
consolidated annual or quarterly financial statements, and (iii) with respect to
each other tangible asset of the Company or its consolidated Subsidiaries, the
greater of (a) the net book value of such other tangible asset on a date no
earlier than the date of the Company's latest consolidated annual or quarterly
financial statements, and (b) the appraised value, as estimated by a qualified
independent appraiser, of such other tangible asset, as of a date no earlier
than the date that is three years prior to the date of determination (or such
later date on which the Company shall have a reasonable basis to believe that
there has occurred a material decrease in value since the determination of such
appraised value), minus (B) minority interests and, to the extent not otherwise
taken into account in determining Adjusted Consolidated Net Tangible Assets, any
gas balancing liabilities of the Company and its consolidated Subsidiaries.  In
addition to, but without duplication of, the foregoing, for purposes of this
definition, "Adjusted Consolidated Net Tangible Assets" shall be calculated
after giving effect, on a pro forma basis, to (1) any Investment not prohibited
by the Indenture, to and including the date of the transaction giving rise to
the need to calculate Adjusted Consolidated Net Tangible Assets (the "Assets
Transaction Date"), in any other Person that, as a result of such Investment,
becomes a Subsidiary of the Company, (2) the acquisition, to and including the
Assets Transaction Date (by merger, consolidation or purchase of stock or
assets), of any business or assets, including, without limitation, Permitted
Industry Investments, and (3) any sales or other dispositions of assets
permitted by the Indenture (other than sales of Hydrocarbons or other mineral
products in the ordinary course of business) occurring on or prior to the Assets
Transaction Date. 

                                       46
<PAGE>
 
For purposes of calculating the ratio of the Company's Adjusted Consolidated Net
Tangible Assets to Indebtedness of the Company and its Subsidiaries,
Indebtedness of a Subsidiary that is not a Wholly Owned Subsidiary (which
Indebtedness is non-recourse to the Company or any other Subsidiary or any of
their assets) shall be included only to the extent of the Company's pro rata
ownership interest in such Subsidiary.

     "Adjusted Net Assets" of a Subsidiary Guarantor at any date shall mean the
lesser of the amount by which (x) the fair value of the property of such
Subsidiary Guarantor exceeds the total amount of liabilities, including, without
limitation, contingent liabilities (after giving effect to all other fixed and
contingent liabilities incurred or assumed on such date), but excluding
liabilities under the Guarantee, of such Subsidiary Guarantor at such date and
(y) the present fair saleable value of the assets of such Subsidiary Guarantor
at such date exceeds the amount that will be required to pay the probable
liability of such Subsidiary Guarantor on its debts (after giving effect to all
other fixed and contingent liabilities incurred or assumed on such date and
after giving effect to any collection from any Subsidiary of such Subsidiary
Guarantor in respect of the obligations of such Subsidiary under the Guarantee),
excluding debt in respect of the Guarantee, as they become absolute and matured.

     "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 the purposes of this definition,
"control" when used with respect to any specified Person means the power to
direct the management and policies of such Person directly or indirectly,
whether through the ownership of Voting Stock, by contract or otherwise; and the
terms "controlling" and "controlled" have meanings correlative to the foregoing.

     "Asset" means each of the assets that are owned by the Company or a
Subsidiary on the date of the Indenture or that are acquired by the Company or a
Subsidiary after the date of the Indenture.

     "Asset Disposition" means any sale, lease, transfer, exchange or other
disposition (or series of related sales, leases, transfers, exchanges or
dispositions) of shares of Capital Stock of a Subsidiary (other than directors'
qualifying shares), or of property or assets (including any interests therein)
(each referred to for purposes of this definition as a "disposition") by the
Company or any of its Subsidiaries, including any disposition by means of a
merger, consolidation or similar transaction (other than (A) by the Company to a
Subsidiary or by a Subsidiary to the Company or a Subsidiary (in the case of a
transfer to a Subsidiary that is not a wholly owned Subsidiary, dispositions
shall be excluded pursuant to clause (A) only to the extent of the Company's
interest in such Subsidiary after giving effect to such transfer), (B) any
Investment in an Unrestricted Subsidiary not prohibited under the provisions
described in the "Limitation on Restricted Payments" covenant, (C) a disposition
of Hydrocarbons or other mineral products in the ordinary course of business,
and (D) the disposition of all or substantially all of the assets of the Company
in compliance with the "Merger, Consolidation or Sale of Substantially All
Assets" covenant).

     "Average Life" means, as of the date of determination, with respect to any
Indebtedness, the quotient obtained by dividing (i) the sum of the products of
(x) the number of years from such date to the date of each successive scheduled
principal payment of such Indebtedness multiplied by (y) the amount of such
principal payment by (ii) the sum of all such principal payments.

     "Bank Credit Agreement" means the Third Amended and Restated Credit
Agreement, dated April 11, 1996, among the Company, ING (U.S.) Capital
Corporation, BankBoston, N.A., Den norske Bank AS, Wells Fargo Bank (Texas),
National Association, Texas Commerce Bank National Association, Comerica Bank--
Texas, and ING (U.S.) Capital Corporation, as agent, as amended, modified
(without limitation as to amount), supplemented, extended, restated, replaced,
renewed or refinanced from time to time in whole or in part in one or more
credit agreements, loan agreements, instruments or similar agreements, as such
may be further amended, modified (without limitation as to amount),
supplemented, extended, restated, replaced, renewed or refinanced from time to
time.

     "Board of Directors" means, with respect to any Person, the board of
directors of such Person or any committee of the board of directors of such
Person duly authorized to act on behalf of the board of directors of such
Person.

                                       47
<PAGE>
 
     "Capital Stock" means, with respect to any Person, any and all shares,
interests, participations or other equivalents (however designated) of corporate
stock and any and all warrants, options and rights with respect thereto,
including each class of common stock and preferred stock of such Person.

     "Capitalized Lease Obligation" means the discounted present value of the
rental obligations of any Person under any lease of Property, which in
accordance with GAAP, is required to be capitalized on the balance sheet of such
Person.

     "Change of Control" means (i) an event or series of events by which any
Person or other entity or group of Persons or other entities acting in concert
as a partnership or other group (a "Group of Persons") shall, as a result of a
tender or exchange offer, open market purchases, privately negotiated purchases,
merger, consolidation or otherwise, have become the beneficial owner (within the
meaning of Rule 13d-3 under the Exchange Act) of 40% or more of the combined
voting power of the then outstanding Voting Stock of the Company, (ii) during
any period of two consecutive years, Continuing Directors cease for any reason
to constitute a majority of the Board of Directors then in office, or (iii) the
direct or indirect sale, lease, exchange or other transfer of all or
substantially all of the Assets to any Person or Group of Persons.

     "Company Properties" means all Properties, and equity, partnership or other
ownership interests therein, that are related or incidental to, or used or
useful in connection with, the conduct or operation of any business activities
of the Company or the Subsidiaries, which business activities are not prohibited
by the terms of the Indenture.

     "Consolidated EBITDA" means, with respect to any Person for any period, the
Consolidated Net Income of such Person for such period increased (to the extent
deducted in determining Consolidated Net Income) by the sum of:  (i) all income
taxes of such Person and its subsidiaries paid or accrued according to GAAP for
such period (other than income taxes attributable to extraordinary, unusual or
non-recurring gains or losses), (ii) all interest expense of such Person and its
subsidiaries paid or accrued in accordance with GAAP for such period (including
amortization of original issue discount and the interest portion of deferred
payment obligations), (iii) depreciation and depletion of such Person and its
subsidiaries, (iv) amortization of such Person and its subsidiaries including,
without limitation, amortization of capitalized debt issuance costs and (v) any
other non-cash charges to the extent deducted from Consolidated Net Income.

     "Consolidated EBITDA Coverage Ratio" means, with respect to any Person, the
ratio of (1) Consolidated EBITDA of such Person for the period (the "Pro Forma
Period") consisting of the most recent four full fiscal quarters for which
financial information in respect thereof is available immediately prior to the
date of the transaction giving rise to the need to calculate the Consolidated
EBITDA Coverage Ratio (the "Transaction Date") to (2) the aggregate Fixed
Charges which such Person will accrue during the fiscal quarter in which the
Transaction Date occurs and the three fiscal quarters immediately subsequent to
such fiscal quarter (the "Forward Period") on the aggregate amount of
Indebtedness outstanding on the Transaction Date, including any Indebtedness
proposed to be incurred on such date and excluding any Indebtedness repaid with
the proceeds of such Indebtedness (as though all such Indebtedness was incurred
or repaid on the first day of the quarter in which the Transaction Date
occurred).  In addition to, but without duplication of, the foregoing, for
purposes of this definition, "Consolidated EBITDA" shall be calculated after
giving effect (without duplication), on a pro forma basis for the Pro Forma
Period (but no longer), to (a) any Investment, during the period commencing on
the first day of the Pro Forma Period to and including the Transaction Date (the
"Reference Period"), in any other Person that, as a result of such Investment,
becomes a subsidiary of such Person, (b) the acquisition, during the Reference
Period (by merger, consolidation or purchase of stock or assets) of any business
or assets, which acquisition is not prohibited by the Indenture, including but
not limited to Permitted Industry Investments, as if such acquisition had
occurred on the first day of the Reference Period, (c) any sales or other
dispositions of assets (other than sales of Hydrocarbons and other mineral
products in the ordinary course of business) occurring during the Reference
Period, in each case as if such incurrence, Investment, repayment, acquisition
or asset sale had occurred on the first day of the Reference Period and (d)
interest income reasonably anticipated by the Company to be received during the
Pro Forma Period from Investments in Permitted Obligations, which Investments
exist on the Transaction Date or will exist as a result of the transaction
giving rise to the need to calculate the Consolidated EBITDA Coverage Ratio. For
purposes of this definition, "Fixed Charges" shall be calculated after giving
effect (without duplication), on a pro forma basis for the Forward Period, to
any Indebtedness incurred or repaid on or after the first day of the Forward
Period and prior

                                       48
<PAGE>
 
to the Transaction Date. For purposes of calculating the Company's Consolidated
EBITDA Coverage Ratio, Indebtedness of a Subsidiary that is not a Wholly Owned
Subsidiary (which Indebtedness is non-recourse to the Company or any other
Subsidiary or any of their assets) shall be included only to the extent of the
Company's pro rata ownership interest in such Subsidiary.

     "Consolidated Net Income" of any Person means, for any period, the
aggregate net income (or loss) of such Person and its subsidiaries for such
period on a consolidated basis, determined in accordance with GAAP, provided
that (a) the net income of (i) any Unrestricted Subsidiary and (ii) any other
Person in which such Person or any subsidiary thereof has an interest (which
interest, in the case of those Persons referred to in clause (ii), does not
cause the net income of such other Person to be consolidated with the net income
of such Person in accordance with GAAP) will be included only to the extent of
the amount of dividends or distributions actually paid to such Person or its
subsidiaries by such other Person in such period; (b) the net income of any
subsidiary of such Person that is subject to any Payment Restriction will be
excluded to the extent of such Payment Restriction; and (c) (i) the net income
(or loss) of any other Person acquired in a pooling of interests transaction for
any period prior to the date of such acquisition, (ii) any net gain (but not
loss) on the sale or other disposition by such Person or any of its subsidiaries
of assets and of the Capital Stock of any subsidiary of such Person, and (iii)
items which are extraordinary, will each be excluded; provided, in no event
shall the computation of Consolidated Net Income of the Company include or take
into effect the premium or write-off of debt issuance costs, if any, paid by the
Company optionally to redeem or otherwise prepay the 12% Notes issued pursuant
to the Prior Indenture or the Series A/B Notes issued under the Series A/B
Indenture.

     "Consolidated Net Worth" as of any date means with respect to any Person
the amount by which the assets of such Person and its subsidiaries on a
consolidated basis exceed (i) the total liabilities of such Person and its
subsidiaries on a consolidated basis, plus (ii) Disqualified Capital Stock of
such Person or Disqualified Capital Stock of any subsidiary of such Person
issued to any Person other than such Person or another wholly owned Subsidiary
of such Person, in each case determined in accordance with GAAP.

     "Contango Market Transaction" means a transaction in which the Company or
any Subsidiary either (i) establishes a position using New York Mercantile
Exchange Crude Oil Futures contracts to purchase Hydrocarbons for future
delivery to it, or (ii) purchases or commits to purchase Hydrocarbons for future
delivery to it, and contemporaneous with such purchase transaction either (y)
establishes one or more positions using New York Mercantile Exchange Crude Oil
Futures contracts to resell at a date subsequent to such delivery date, or (z)
enters into a contract with that Person or another Person to resell at a date
subsequent to such delivery date, a similar aggregate quantity and quality of
Hydrocarbons as so purchased by the Company or such Subsidiary, as applicable,
and at an aggregate price greater than the Indebtedness incurred for the
Hydrocarbons so purchased by the Company or such Subsidiary.

     "Continuing Directors" means any member of the Board of Directors of the
Company on the Issue Date, any director elected since the date thereof in any
annual meeting of the stockholders upon the recommendation of the Board of
Directors of the Company and any other member of the Board of Directors of the
Company who will be recommended or elected to succeed a Continuing Director by a
majority of Continuing Directors who are then members of the Board of Directors
of the Company.

     "Currency Agreement" means the obligations of any Person pursuant to any
foreign exchange contract, currency swap agreement or other similar agreement or
arrangement designed to protect such Person or any of its subsidiaries against
fluctuations in currency values.

     "Default" means any event which is, or after notice or passage of time
would be, an Event of Default.

     "Disqualified Capital Stock" means, with respect to any Person, any Capital
Stock of such Person or its subsidiaries that, by its terms, by the terms of any
agreement related thereto or by the terms of any security into which,
mandatorily or at the option of the holder, it is convertible or exchangeable,
is, or upon the happening of an event or the passage of time would be, required
to be redeemed or repurchased by such Person or its subsidiaries, including at
the option of the holder, in whole or in part, or has, upon the happening of an
event or

                                       49
<PAGE>
 
the passage of time would have, a redemption or similar payment due, in each
such case on or prior to the Maturity Date.

     "Fixed Charges" means, with respect to any Person, for any period, the
aggregate amount of (i) interest, whether expensed or capitalized, paid, accrued
or scheduled to be paid or accrued during such period (except to the extent
accrued in a prior period) in respect of all Indebtedness of such Person and its
consolidated subsidiaries (including (a) original issue discount on any
Indebtedness and (b) the interest portion of all deferred payment obligations,
calculated in accordance with the effective interest method, in each case to the
extent attributable to such period) and (ii) dividend requirements on
Disqualified Capital Stock of such Person and its consolidated subsidiaries
(whether in cash or otherwise (except dividends payable in shares of Qualified
Capital Stock) (non-cash dividends being valued as determined in good faith by
the Board of Directors of such Person, as evidenced by a Board Resolution))
paid, accrued or scheduled to be paid or accrued during such period (except to
the extent accrued in a prior period) and excluding items eliminated in
consolidation.

     For purposes of the definition of Fixed Charges, (a) interest on a
Capitalized Lease Obligation shall be deemed to accrue at an interest rate
reasonably determined by the Board of Directors of such Person (as evidenced by
a Board Resolution) to be the rate of interest implicit in such Capitalized
Lease Obligation in accordance with GAAP; (b) interest on Indebtedness that is
determined on a fluctuating basis shall be deemed to have accrued at a fixed
rate per annum equal to the rate of interest of such Indebtedness in effect on
the date Fixed Charges are being calculated, subject to the proviso in clause
(c); (c) interest on Indebtedness that may optionally be determined at an
interest rate based upon a factor of a prime or similar rate, a eurocurrency
interbank offered rate, or other rate, shall be deemed to have been based upon
the rate actually chosen, or, if none, then based upon such optional rate chosen
as the Company may designate, (provided that, for the period following the date
on which the rate actually chosen ceases to be in effect, the Company may
designate an optional rate other than that actually chosen, which optional rate
shall be deemed to accrue at a fixed per annum equal to the rate of interest on
such optional rate in effect on the date Fixed Charges are being calculated);
and (d) Fixed Charges shall be increased or reduced by the net cost (including
amortization of discount) or benefit associated with obligations under Interest
Rate Agreements attributable to such period.

     "GAAP" means generally accepted accounting principles as in effect in the
United States of America as of any date of determination.

     "Guarantor Senior Indebtedness" means all Indebtedness of a Subsidiary
Guarantor (present and future) created, incurred, assumed or guaranteed by the
Subsidiary Guarantor (and all renewals, extensions, increases or refundings
thereof) (including the principal of, interest on and fees, premiums, expenses
(including costs of collection), indemnities and other amounts payable in
connection with such Indebtedness, and including any Post-Commencement Amounts),
unless the instrument governing such Indebtedness expressly provides that such
Indebtedness is not senior or superior in right of payment to the Guarantee.
Notwithstanding the foregoing, Guarantor Senior Indebtedness does not include
(i) any Indebtedness of the Subsidiary Guarantor to the Company or any
Subsidiary or any Unrestricted Subsidiary, and (ii) any amounts payable or other
liabilities to trade creditors.

     "Hydrocarbons" means oil, gas, casinghead gas, drip gasoline, natural
gasoline, condensate, distillate, liquid hydrocarbons, gaseous hydrocarbons and
all constituents, elements or compounds thereof and products refined or
processed therefrom.

     "Indebtedness" means, with respect to any Person, without duplication, any
liability, contingent or otherwise, of such Person (i) for borrowed money
(whether or not the recourse of the lender is to the whole of the assets of such
Person or only to a portion thereof), (ii) evidenced by bonds, notes, debentures
or similar instruments, (iii) representing the deferred and unpaid balance of
the purchase price of any property or interest therein (other than (A) any such
balance that represents an account payable or any other monetary obligation to a
trade creditor created, incurred, assumed or guaranteed by such Person in the
ordinary course of business of such Person in connection with obtaining goods,
materials or services and due within twelve months (or such longer period for
payment as is customarily extended by such trade creditor) of the incurrence
thereof, which account is not overdue by more than 150 days, according
to the original terms of sale, unless such account payable is being contested in
good faith 

                                       50
<PAGE>
 
or has been extended, and (B) the Indebtedness with respect to the Restructure
Agreement dated as of February 25, 1991 by and among the Company, The Aetna
Casualty and Surety Company and Aetna Life Insurance Company), (iv) for the
payment of a Capitalized Lease Obligation of such Person, (v) with respect to
the reimbursement of any letter of credit, banker's acceptance or similar credit
transaction, (vi) with respect to Indebtedness (as otherwise defined in this
definition) of another Person secured by a Lien on any asset of such Person,
whether or not such Indebtedness is assumed by such Person (provided that if the
obligations so secured have not been assumed in full by such Person or are not
otherwise such Person's legal liability in full, then such obligations shall be
deemed to be in an amount equal to the greater of (A) the lesser of (1) the full
amount of such obligations, and (2) the fair market value of such assets, as
determined in good faith by the Board of Directors of such Person, which
determination shall be evidenced by a Board Resolution, and (B) the amount of
obligations as have been assumed by such Person or which are otherwise such
Person's legal liability), (vii) with respect to production payments in
connection with oil and gas properties of such Person, other than any Permitted
Production Payment Obligations, (viii) to the extent not otherwise included,
under Currency Agreements and Interest Rate Agreements entered into other than
in the ordinary course of such Person's business, (ix) in the case of such
Person, the liquidation preference and any mandatory redemption payment
obligations in respect of Disqualified Capital Stock, and, in the case of a
subsidiary of such Person, the liquidation preference and any mandatory
redemption payment obligations in respect of preferred stock of such subsidiary,
and (x) in respect of all Indebtedness of others which such Person has
guaranteed, endorsed with recourse (otherwise than for collection, deposit or
other similar transactions in the ordinary course of business), agreed to
purchase or repurchase or in respect of which such Person has agreed
contingently to supply or advance funds or for which such Person has otherwise
become liable; provided, however, Indebtedness arising pursuant to clause
(iii)(A) of this definition as a result of such account payable becoming overdue
by more than 150 days shall only be deemed to be incurred at a time when
Indebtedness, other than such Indebtedness, is incurred.

     "Insolvency or Liquidation Proceeding" means, with respect to any Person,
(a) an insolvency or bankruptcy case or proceeding, or any receivership,
liquidation, reorganization proceeding or other similar case or proceeding,
relative to such Person or to its creditors, as such, or its assets, or (b) any
liquidation, dissolution, or reorganization proceeding of such Person, whether
voluntary or involuntary and whether or not involving insolvency or bankruptcy,
or (c) any assignment for the benefit of creditors or any other marshalling of
assets and liabilities of such Person.

     "Interest Rate Agreement" means the obligations of any Person pursuant to
any interest swap agreement, interest rate collar agreement or other similar
agreement or arrangement designed to protect such Person or any of its
subsidiaries against fluctuations in interest rates.

     "Investment" means, in respect of any Person, any investment in another
Person, whether by means of a share purchase, capital contribution, loan,
advance (other than advances to employees for moving and travel expenses,
drawing accounts and similar expenditures in the ordinary course of business) or
similar credit extension constituting Indebtedness of such other Person and any
guaranty of Indebtedness of any other Person.  For purposes of the "Limitation
on Restricted Payments" covenant and the definition of Permitted Unrestricted
Subsidiary Investments, (i) an "Investment" in an Unrestricted Subsidiary shall
be deemed to include and be valued at the fair market value of the net assets of
any Subsidiary at the time that such Subsidiary is designated an Unrestricted
Subsidiary, and (ii) any Investment in an Unrestricted Subsidiary shall be
valued at fair market value at the time of such Investment (except however, when
such Investment consists of a loan or advance by a Person to another Person that
is of an intercompany or similar nature between such Persons and arises pursuant
to an agreement or understanding in the ordinary course of business relating to
tax sharing, administrative or other similar arrangements, then such Investment
shall be valued at fair market value at the time that the investing Person shall
have paid monies or transferred other consideration to another Person for the
benefit of the Person in whom the agreement to make such loan or advance was
made), in each case as determined by the Board of Directors of the Company and
such Subsidiary, as applicable, in good faith.

     "Issue Date" means the date of first issuance of Series A/B Notes under the
Series A/B Indenture.

     "Lien" means, with respect to any Person, any mortgage, pledge, lien,
encumbrance, easement, restriction, covenant, right-of-way, charge or adverse
claim affecting title or resulting in an encumbrance
against real or 

                                       51
<PAGE>
 
personal property of such Person, or a security interest of any kind (including
any conditional sale or other title retention agreement, any lease in the nature
thereof, any option, right of first refusal or other similar agreement to sell,
in each case securing obligations of such Person and any filing of or agreement
to give any financing statement under the Uniform Commercial Code (or equivalent
statute or statutes) of any jurisdiction).
 
     "Material Change" means an increase or decrease of more than 10% during a
fiscal quarter in the discounted future net cash flows (excluding changes that
result solely from changes in prices) from proved oil and gas reserves of the
Company and consolidated Subsidiaries (before any state or federal income tax);
provided, however, that the following will be excluded from the Material Change
calculation:  (i) any acquisitions during the quarter of oil and gas reserves
that have been estimated by independent petroleum engineers and on which a
report or reports exist, (ii) any reserves added during the quarter attributable
to the drilling or recompletion of wells not included in previous reserve
estimates, but which will be included in future quarters, and (iii) any
disposition of properties existing at the beginning of such quarter that have
been disposed of as provided in "Limitation on Disposition of Assets".

     "Material Subsidiary" means any Subsidiary of the Company which, as of the
relevant date of determination, would be a "significant subsidiary" as defined
in Reg. (S) 230.405 promulgated pursuant to the Securities Act as in effect on
the Issue Date, assuming the Company is the "registrant" referred to in such
definition, except that the 10% amounts referred to in such definition shall be
deemed to be 5%.

     "Moody's" means Moody's Investors Service, Inc. and its successors.

     "Net Available Proceeds" means, with respect to any Asset Disposition of
any Person, cash proceeds received (including any cash proceeds received by way
of deferred payment of principal pursuant to a note or installment receivable or
otherwise, but only as and when received, and excluding any other consideration
until such time as such consideration is converted into cash) therefrom, in each
case net of all legal, title and recording tax expenses, commissions and other
fees and expenses incurred, and all federal, state or local taxes required to be
accrued as a liability as a consequence of such Asset Disposition, and in each
case net of all Indebtedness which is secured by such Assets, in accordance with
the terms of any Lien upon or with respect to such Assets, or which must, by its
terms or in order to obtain a necessary consent to such Asset Disposition or by
applicable law, be repaid out of the proceeds from such Asset Disposition and
which is actually so repaid.

     "Net Proceeds" means (a) in the case of any sale by the Company of
Qualified Capital Stock, the aggregate net cash proceeds received by the
Company, after payment of expenses, commissions and the like incurred in
connection therewith, and (b) in the case of any exchange, exercise, conversion
or surrender of any outstanding securities or Indebtedness of the Company for or
into shares of Qualified Capital Stock of the Company, the net book value of
such outstanding securities or Indebtedness as adjusted on the books of the
Company on the date of such exchange, exercise, conversion or surrender (plus
any additional amount required to be paid by the holder of such Indebtedness or
securities to the Company upon such exchange, exercise, conversion or surrender
and less any and all payments made to the holders of such Indebtedness or
securities, and all other expenses incurred by the Company in connection
therewith).

     "Net Working Capital" means (i) all current assets of the Company and its
consolidated Subsidiaries, minus (ii) all current liabilities of the Company and
its consolidated Subsidiaries, except current liabilities included in
Indebtedness.

     "Non-Recourse Indebtedness" means Indebtedness that, under the terms
thereof or pursuant to applicable law, neither the Company nor any Subsidiary of
the Company (other than a Subsidiary being designated as an Unrestricted
Subsidiary) is directly or indirectly liable for and there is no recourse
against any of the assets or properties of the Company or such Subsidiary.

     "Obligations" mean the due and punctual payment of principal of and
interest on the Securities when due, whether at maturity, by acceleration, by
redemption or otherwise, and all other monetary obligations of the 

                                       52
<PAGE>
 
Company under the Indenture and the Notes and the due and punctual performance
of all other obligations of the Company under the Indenture and the Notes.

     "Oil and Gas Properties" means all Properties, including equity or other
ownership interests therein, owned by such Person which have been assigned
"proved oil and gas reserves" as defined in Rule 4-10 of Regulation S-X of the
Securities Act as in effect on the Issue Date.

     "Permitted Acquisition Indebtedness" means Indebtedness of the Company or
any Subsidiary to the extent such Indebtedness is incurred to finance the
acquisition of Oil and Gas Properties (and development costs related thereto)
and does not exceed the principal amount of $50 million with respect to any such
acquisition transaction or series of related acquisition transactions, if on the
date of the incurrence (i) (A) the Adjusted Consolidated Net Tangible Assets
acquired are equal to or greater than 200% of the Indebtedness incurred, and (B)
the Adjusted Consolidated Net Tangible Assets of the Company (after giving
effect to such acquisition) are equal to or greater than 125% of the
consolidated Indebtedness of the Company and its Subsidiaries, or (ii) (A) the
Property Net Revenue Coverage Ratio would have been equal to or greater than 2.5
to 1.0, (B) the Adjusted Consolidated Net Tangible Assets acquired are equal to
or greater than 150% of the Indebtedness incurred, and (C) the Adjusted
Consolidated Net Tangible Assets of the Company (after giving effect to such
acquisition) are equal to or greater than 125% of the consolidated Indebtedness
of the Company and its Subsidiaries.

     "Permitted Contango Market Transaction Obligations" means Indebtedness of
the Company or any Subsidiary under letter of credit or borrowed money
obligations, or in lieu of or in addition to such letters of credit or borrowed
money, guarantees of such Indebtedness or other obligations of the Company or
any Subsidiary by the Company or any other Subsidiary, as applicable, related to
a Contango Market Transaction, provided that, (1) if the Company or such
Subsidiary has entered into such a contract to resell at a subsequent date, as
distinguished from establishing a position using New York Mercantile Exchange
Crude Oil Future contracts to resell at a subsequent date, (A) the Person with
which the Company or such Subsidiary has such contract to sell has an investment
grade credit rating by S&P or Moody's, or in lieu thereof, a Person guaranteeing
the payment of such obligated Person has an investment grade credit rating by
S&P or Moody's, or (B) such Person posts a letter of credit in favor of the
Company or such Subsidiary with respect to such contract and (2) for the period
commencing on the date the Company or such Subsidiary is obligated to take
delivery of such Hydrocarbons so purchased by it and until and including the
date on which delivery to the purchaser is fulfilled, the Company or such
Subsidiary has the right and ability to store such quantity and quality of
Hydrocarbons in storage facilities owned, leased, operated or otherwise
controlled by the Company or any Subsidiary.

     "Permitted Indebtedness" means (i) Indebtedness under the Outstanding Notes
and any Exchange Note issued in exchange for Outstanding Notes of equal
principal amount; (ii) Indebtedness outstanding in an aggregate principal amount
at any one time outstanding not to exceed $100 million under the Bank Credit
Agreement, plus all interest and fees under such agreements and any guarantee of
any such Indebtedness; (iii) the Guarantees of the Notes and the Series A/B
Securities (as defined in the Series A/B Indenture) (and any assumption of the
obligations guaranteed thereby); (iv) Permitted Refinancing Indebtedness; (v)
Indebtedness of the Company to any Wholly Owned Subsidiary, and any Indebtedness
of any Wholly Owned Subsidiary to the Company or to any Wholly Owned Subsidiary
of the Company; provided, that in each case, such Indebtedness has not been
incurred in contemplation of any subsequent issuance or transfer of any Capital
Stock or any other event which would result in any such Wholly Owned Subsidiary
ceasing to be a Wholly Owned Subsidiary or any other subsequent transfer of any
such Indebtedness (except to the Company or a Wholly Owned Subsidiary), and if
incurred in contemplation of any of the foregoing events, then such Indebtedness
shall be deemed to be incurred and shall be treated as an incurrence of
Indebtedness for purposes of the "Limitation on Indebtedness" covenant at the
time the Wholly Owned Subsidiary in question ceased to be a Wholly Owned
Subsidiary; (vi) Permitted Marketing Obligations and Permitted Contango Market
Transaction Obligations; (vii) Permitted Acquisition Indebtedness; (viii)
Permitted Operating Obligations; (ix) other Indebtedness outstanding at any time
in an aggregate principal amount not to exceed the greater of $15 million or
2.5% of Adjusted Consolidated Net Tangible Assets of the Company; and(x)
Indebtedness outstanding on the Issue Date; and (xi) Indebtedness under any
Series B Securities (as defined in the Series A/B Indenture) issued in exchange
for any Series A Securities of equal principal amount. Permitted Refinancing
Indebtedness that constitutes a refinancing of amounts referred to in clauses
(ii) and (ix) shall be deemed to be incurred pursuant to 

                                       53
<PAGE>
 
and subject to the limitations in clauses (ii) and (ix), respectively. The
Company may elect at any time that amounts of Indebtedness incurred under
clauses (ii) or (ix) be deemed to be incurred pursuant to the first paragraph of
the "Limitation on Incurrence of Additional Indebtedness" covenant (if then
permitted to be so incurred), in which event such amounts so incurred shall be
deemed not to be incurred under clause (ii) or (ix); provided, however, any such
Indebtedness deemed not to be incurred under clause (ii) shall still be treated
as Indebtedness under and governed by the Bank Credit Agreement for purposes of
all other provisions of the Indenture.

     "Permitted Industry Investments" means (i) capital expenditures, including,
without limitation, acquisitions of Company Properties and interests therein;
(ii)(a) entry into operating agreements, joint ventures, working interests,
royalty interests, mineral leases, unitization agreements, pooling arrangements
or other similar or customary agreements, transactions, properties, interests or
arrangements, and Investments and expenditures in connection therewith or
pursuant thereto, in each case made or entered into in the ordinary course of
the oil and gas business, or (b) exchanges of Company Properties for other
Company Properties of at least equivalent value as determined in good faith by
the Board of Directors of the Company; (iii) Investments by the Company or any
Subsidiary in any Subsidiary (or in any Person that becomes a Subsidiary as a
result of such Investment) that are not subject to any Payment Restriction; (iv)
Investments in the Company or another Subsidiary that are not subject to any
Payment Restriction by any Subsidiary; and (v) Investments of operating funds on
behalf of co-owners of Oil and Gas Properties of the Company or the Subsidiaries
pursuant to joint operating agreements.

     "Permitted Investments" means Permitted Obligations and Permitted Industry
Investments (in each case, other than Investments in Unrestricted Subsidiaries).

     "Permitted Liens" means (i) Liens for taxes, assessments and governmental
charges not yet delinquent or being contested in good faith and for such
adequate reserves have been established to the extent required by GAAP, (ii)
landlord's, carriers, warehouseman's, storage, mechanics', workmen's,
materialmen's, operator's or similar Liens arising in the ordinary course of
business, (iii) easements, rights-of-way, restrictions and other similar
encumbrances incurred in the ordinary course of business and encumbrances
consisting of zoning restrictions, easements, licenses, restrictions on the use
of Company Properties or minor imperfections in title thereto which, in the
aggregate, are not material in amount, and which do not in any case materially
detract from the Company Properties subject thereto or interfere with the
ordinary conduct of the business of the Company or the Subsidiaries, (iv) Liens
on, or related to, Properties to secure all or part of the costs incurred in the
ordinary course of business of exploration, drilling, development, production,
processing, transportation, marketing or storage, or operation thereof, (v)
Liens on pipeline or pipeline facilities, Hydrocarbons or Company Properties
which arise out of operation of law, (vi) judgment and attachment Liens not
giving rise to an Event of Default or Liens created by or existing from any
litigation or legal proceeding that are currently being contested in good faith
by appropriate proceedings and for which adequate reserves have been made, (vii)
(a) Liens upon any Property of any Person existing at the time of acquisition
thereof by the Company, (b) Liens upon any Property of a Person existing at the
time such Person is merged or consolidated with the Company or any Subsidiary or
existing at the time of the sale or transfer of any such Property of such Person
to the Company or any Subsidiary, or (c) Liens upon any Property of a Person
existing at the time such Person becomes a Subsidiary; provided that in each
case such Lien has not been created in contemplation  of such sale, merger,
consolidation, transfer or acquisition, and provided further that in each such
case no such Lien shall extend to or cover any Property of the Company or any
Subsidiary other than the Property being acquired and improvements thereon,
(viii) Liens existing on the Issue Date, (ix) Liens on deposits made in the
ordinary course of business, including, without limitation, pledges or deposits
under worker's compensation, unemployment insurance and other social security
legislation and deposits to secure the performance of bids, trade contracts
(other than for borrowed money), leases, statutory obligations, surety and
appeal bonds, performance bonds and other obligations of a similar nature
incurred in the ordinary course of business, (x) Liens in favor of collecting or
payor banks having a right of setoff, revocation, refund or chargeback with
respect to money or instruments of the Company or any Subsidiary on deposit with
or in possession of such bank, (xi) royalties, overriding royalties, revenue
interests, net revenue interests, net profit interests, reversionary interests,
production payments, production sales contracts, operating agreements and other
similar interests, properties, arrangements and agreements, all as ordinarily
exist with respect to Company Properties, (xii) Liens upon any Property which
were created solely for the purpose of securing Indebtedness representing, or
incurred to finance, refinance or refund, the cost (including the cost of
construction) of such Property; provided that no such Lien shall 

                                       54
<PAGE>
 
extend to or cover any Property of the Company or any Subsidiary other than the
Property so acquired and improvements thereon, (xiii) Liens securing Senior
Indebtedness or Guarantor Senior Indebtedness, whether in whole or part thereof,
(xiv) with respect to any Company Properties, Liens arising under, or in
connection with, or related to, farm-out, farm-in, joint operating, area of
mutual interest agreements and/or other similar or customary arrangements,
agreements or interests that the Company or any Subsidiary determines in good
faith to be necessary for the economic development of such Property, and (xv)
Liens upon any Property securing obligations under hedging agreements, swap
agreements or other similar agreements entered into for the purpose of
protecting against fluctuations in oil or natural gas prices.

     "Permitted Marketing Obligations" means, other than Permitted Operating
Obligations or Indebtedness relating to Contango Market Transactions,
Indebtedness of the Company or any Subsidiary under letter of credit or borrowed
money obligations, or in lieu of or in addition to such letters of credit or
borrowed money, guarantees of such Indebtedness or other obligations of the
Company or any Subsidiary by any other Subsidiary or the Company, as applicable,
related to the purchase by the Company or any Subsidiary of Hydrocarbons for
which the Company or such Subsidiary has contracts to sell; provided, that in
the event that such Indebtedness or obligations are guaranteed by the Company or
any Subsidiary, then either (i) the Person with which the Company or such
Subsidiary has contracts to sell has an investment grade credit rating from S&P
or Moody's, or in lieu thereof, a Person guaranteeing the payment of such
obligated Person has an investment grade credit rating from S&P or Moody's, or
(ii) such Person posts, or has posted for it, a letter of credit in favor of the
Company and such Subsidiary with respect to all of such Person's obligations to
the Company or such Subsidiary under such contracts.

     "Permitted Obligations" means (a) the following kinds of instruments if, in
the case of instruments referred to in clauses (i)-(iv) below, on the date of
purchase or other acquisition of any such instrument by the Company or any
Subsidiary, the remaining term to maturity is not more than one year:  (i)
readily marketable obligations issued or unconditionally guaranteed as to
principal and interest by the United States of America or by any agency or
authority controlled or supervised by and acting as an instrumentality of the
United States of America; (ii) repurchase obligations for instruments of the
type described in clause (i) for which delivery of the instrument is made
against payment; (iii) obligations (including, but not limited to, demand or
time deposits, bankers' acceptances and certificates of deposit) issued by a
depository institution or trust company incorporated or doing business under the
laws of the United States of America, any state thereof or the District of
Columbia or a branch or subsidiary of any such depository institution or trust
company operating outside the United States, provided that such depository
institution or trust company has, at the time of the Company's or such
Subsidiary's investment therein or contractual commitment providing for such
investment, capital, surplus or undivided profits (as of the date of such
institution's most recently published financial statements), in excess of
$100,000,000; and (iv) commercial paper issued by any Person, if such commercial
paper has, at the time of the Company's or any Subsidiary's investment therein
or contractual commitment providing for such investment, credit ratings of A-1
by S&P and P-1 by Moody's; and (b) money market mutual or similar funds having
assets in excess of $100,000,000.

     "Permitted Operating Obligations" means Indebtedness of the Company or any
Subsidiary in respect of one or more standby letters of credit, bid, performance
or surety bonds, or other reimbursement obligations, issued for the account of,
or entered into by, the Company or any Subsidiary in the ordinary course of
business (excluding obligations related to the purchase by the Company or any
Subsidiary of Hydrocarbons for which the Company or such Subsidiary  has
contracts to sell), or in lieu of any thereof or in addition to any thereto,
guarantees and letters of credit supporting any such obligations and
Indebtedness (in each case, other than for an obligation for borrowed money,
other than borrowed money represented by any such letter of credit, bid,
performance or surety bond, or reimbursement obligation itself, or any guarantee
and letter of credit related thereto).

     "Permitted Production Payment Obligations" means obligations with respect
to production payments entered into in the ordinary course of the Company's or
any Subsidiary's business, which obligations are non-recourse to the Company and
its Subsidiaries other than to Hydrocarbon production from the properties
subject to such obligations.

     "Permitted Refinancing Indebtedness" means (a) Senior Indebtedness of the
Company or any Subsidiary, the net proceeds of which are used solely to renew,
extend, refinance, refund or repurchase the Notes, including the 

                                       55
<PAGE>
 
amount of reasonable fees and expenses and premium, if any, incurred by the
Company or such Subsidiary in connection therewith; or (b) Indebtedness of the
Company or any Subsidiary, the net proceeds of which are used to renew, extend,
refinance, refund or repurchase (including, without limitation, pursuant to a
Change of Control Offer as required by the terms of the Notes) outstanding
Indebtedness of the Company or any Subsidiary, provided that (i) if the
Indebtedness (including the Notes) being renewed, extended, refinanced, refunded
or repurchased is pari passu with or subordinated in right of payment to either
the Notes or the Subsidiary Guarantees, then such Indebtedness is pari passu
with or subordinated in right of payment to, as the case may be, the Notes or
the Subsidiary Guarantees at least to the same extent as the Indebtedness being
renewed, extended, refinanced, refunded or repurchased, (ii) such Indebtedness
is scheduled to mature no earlier than the Indebtedness being renewed, extended,
refinanced, refunded or repurchased, and (iii) such Indebtedness has an Average
Life at the time such Indebtedness is incurred that is greater than the Average
Life of the Indebtedness being renewed, extended, refinanced, refunded or
repurchased; provided, further, that such Indebtedness (to the extent that such
Indebtedness constitutes Permitted Refinancing Indebtedness) is in an aggregate
principal amount (or, if such Indebtedness is issued at a price less than the
principal amount thereof, the aggregate amount of gross proceeds therefrom is)
not in excess of the aggregate principal amount then outstanding of the
Indebtedness being renewed, extended, refinanced, refunded or repurchased (or if
the Indebtedness being renewed, extended, refinanced, refunded or repurchased
was issued at a price less than the principal amount thereof, then not in excess
of the amount of liability in respect thereof determined in accordance with
GAAP) plus the amount of reasonable fees and expenses and premium, if any,
incurred by the Company or such Subsidiary in connection therewith.

     "Permitted Unrestricted Subsidiary Investments" means Investments in
Unrestricted Subsidiaries in a cumulative aggregate amount (in cash or the fair
market value of property other than cash, as determined in good faith by the
Board of Directors of the Company) not to exceed the sum of (i) $25 million and
(ii) cash or cash equivalent distributions made from any Unrestricted Subsidiary
and received, after the Issue Date, as such by the Company, provided that any
amount included in this clause (ii) shall be deducted from any amounts referred
to in clause (y)(3) of the "Limitation on Restricted Payments" covenant.
Notwithstanding the foregoing, Permitted Unrestricted Subsidiary Investments
shall also include any Investments in Unrestricted Subsidiaries to the extent
such Investment consists of (A) Qualified Capital Stock of the Company or (B)
amounts referred to in clause (y)(2) of the "Limitation on Restricted Payments"
covenant, which Investments shall be excluded from the sum in the previous
sentence, provided that the amount of any Investments pursuant to clause (B)
shall be deducted from amounts referred to in clause (y)(2) of the "Limitation
on Restricted Payments" covenant.

     "Person" means any individual, corporation, limited liability company,
partnership, joint venture, trust, estate, unincorporated organization or
government or any agency or political subdivision thereof.

     "Post-Commencement Amounts" means all interest and fees accrued or accruing
after the commencement of any Insolvency or Liquidation Proceeding in accordance
with and at the contract rate (including, without limitation, any non-usurious
rate applicable upon default) and all premiums, expenses (including costs of
collection), indemnities and other amounts that would have accrued or been
incurred after the commencement of any Insolvency or Liquidation Proceeding in
any case as specified in any agreement or instrument creating, evidencing, or
governing any Senior Indebtedness or any Guarantor Senior Indebtedness, as the
case may be, whether or not, pursuant to applicable law or otherwise, the claim
for such interest, fees, premiums, expenses, indemnities or other amounts is
allowed and non-avoidable as a claim in such Insolvency or Liquidation
Proceeding.

     "Prior Indenture" means the Indenture dated as of October 1, 1992, among
the Company, the "Subsidiary Guarantors" (as therein defined) and Texas Commerce
Bank National Association, successor to Ameritrust Texas National Association,
as trustee, and providing for the issue of the Company's 12% Senior Subordinated
Notes due 1999 in the aggregate principal amount of $100 million.

     "pro forma" means, with respect to any calculation made or required to be
made pursuant to the terms of the Indenture, a calculation in accordance with
Article 11 of Regulation S-X under the Securities Act, as amended.

     "Property" means, with respect to any Person, any interest of such Person
in any kind of property or asset, whether real, personal or mixed, or tangible
or intangible, including, without limitation, Capital Stock, partnership
interests and other equity or ownership interests in any other Person.

                                       56
<PAGE>
 
     "Property Net Revenue Coverage Ratio" means, with respect to Property to be
acquired by the Company or any Subsidiary, the ratio of (i) the amount equal to
(A) the revenues attributable to the sale of Hydrocarbons from such Property for
the most recent four full fiscal quarters for which financial information is
available immediately prior to the acquisition date, (the "Pro Forma Period")
minus (B) the production and general and administrative expenses attributable to
such Property during the Pro Forma Period (the "Property Net Revenue") to (ii)
the aggregate Fixed Charges the Company or any Subsidiary will accrue during the
fiscal quarter in which the acquisition date occurs and the three fiscal
quarters immediately subsequent to such fiscal quarter as a result of
Indebtedness incurred for the purpose of making such acquisition (as though all
such Indebtedness was incurred or repaid on the first day of the quarter in
which the acquisition date occurs). For purposes of this definition, Property
Net Revenue shall be calculated, after giving effect on a pro forma basis for
the Pro Forma Period, to (a) any adjustments in revenues from the sale of
Hydrocarbons as a result of fixed price or other contract arrangements entered
into as of the acquisition date and (b) any adjustments in production and
general and administrative expenses which are fixed or determinable as of the
acquisition date.

     "Public Equity Offering" means an underwritten public offer and sale of
common stock (that is Qualified Capital Stock) of the Company pursuant to a
registration statement that has been declared effective by the Commission
pursuant to the Securities Act (other than a registration statement on Form S-8
or otherwise relating to equity securities issuable under any employee benefit
plan of the Company).

     "Qualified Capital Stock" means any Capital Stock that is not Disqualified
Capital Stock.

     "Rating Agency" means S&P and Moody's or, if S&P or Moody's shall have
ceased to be a "nationally recognized statistical rating organization" (as
defined in Rule 436 under the Act) or shall have ceased to make publicly
available a rating on any outstanding securities of any company engaged
primarily in the oil and gas business, such other organization or organizations,
as the case may be, then making publicly available a rating on the Notes as is
selected by the Company.

     "Rating Date" means, in respect of each Change of Control, the date that is
immediately prior to the date of the first public announcement of an event or
series of events that results in a Change of Control.

     "Rating Decline" means the occurrence on any date following the Rating Date
and prior to a date that is 90 days after the occurrence of a corresponding
Change of Control (which period shall be deemed to be extended so long as prior
to the end of such 90-day period and continuing thereafter the rating of the
Notes is under publicly announced consideration for possible downgrade by either
Rating Agency) of either of the following: (i) the rating of the Notes by either
Rating Agency within such period shall be at least one gradation below the
rating  of the Notes by such  Rating Agency on the Rating Date, or (ii) either
Rating Agency shall withdraw its ratings of the Notes.  A gradation shall
include changes within rating categories (e.g., with respect to S&P a decline in
a rating from BB+ to BB, or from B to B-, will constitute a decrease of one
gradation).

     "Related Person" means (i) any Affiliate of the Company, (ii) any
individual or other Person who directly or indirectly holds 10% or more of the
combined voting power of the then outstanding Voting Stock of the Company, (iii)
any relative of any individual referred to in clauses (i), (ii) and (iv) hereof
by blood, marriage or adoption not more remote than first cousin and (iv) any
officer or director of the Company.

     "Restricted Debt Prepayment" means any purchase, redemption, defeasance
(including, but not limited to, in substance or legal defeasance) or other
acquisition or retirement for value, directly or indirectly, by the Company or a
Subsidiary, prior to the scheduled maturity or prior to any scheduled repayment
of principal or sinking fund payment, as the case may be, in respect of
Indebtedness of the Company or any Subsidiary that is subordinate in right to
the Notes or the Guarantees, provided, however, that any such acquisition shall
be deemed not to be a Restricted Debt Prepayment to the extent it is made (x) in
exchange for or with the proceeds from the substantially concurrent issuance of
Qualified Capital Stock or (y) in exchange for or with the proceeds from the
substantially concurrent issuance of Indebtedness, in a principal amount (or, if
such Indebtedness provides for an amount less than the principal amount thereof
to be due and payable upon the acceleration thereof, with an original issue
price) not to exceed the lesser of (i) the principal amount of Indebtedness
being acquired in exchange therefor (or with 

                                       57
<PAGE>
 
the proceeds therefrom) and (ii) if such Indebtedness being acquired was issued
at an original issue discount, the original issue price thereof plus
amortization of the original issue discount at the time of the incurrence of the
Indebtedness being issued in exchange therefor (or the proceeds of which will
finance such acquisition), and provided further that any such Indebtedness shall
have an Average Life not less than the Average Life of the Indebtedness being
acquired, and shall contain subordination and default provisions no less
favorable, in any material respect, to holders of the Securities than those
contained in such Indebtedness being acquired.

     "Restricted Payment" means any (i) Stock Payment, (ii) Investment (other
than Permitted Investments and other than Permitted Unrestricted Subsidiary
Investments) or (iii) Restricted Debt Prepayment.

     "S&P" means Standard & Poor's Ratings Group and its successors.

     "Senior Indebtedness" means all Indebtedness of the Company (present and
future) created, incurred, assumed or guaranteed by the Company (and all
renewals, extensions or refundings thereof) (including the principal of,
interest on and fees, premiums, expenses (including costs of collection),
indemnities and other amounts payable in connection with such Indebtedness, and
including any Post-Commencement Amounts), unless the instrument governing such
Indebtedness expressly provides that such Indebtedness is not senior or superior
in right of payment to the Securities.  Notwithstanding the foregoing, Senior
Indebtedness of the Company does not include (i) any Indebtedness of the Company
to any Subsidiary or any Unrestricted Subsidiary, and (ii) any amounts payable
or other liabilities to trade creditors.

     "Series A/B Indenture" means the Indenture dated as of March 15, 1996,
among the Company, the "Subsidiary Guarantors" (as defined therein) and Texas
Commerce Bank National Association, as trustee, and providing for the issue of
the Company's 10 1/4 Senior Subordinated Notes due 2006 in the aggregate
principal amount of $150 million.

     "Series A/B Notes" means the "Notes" issued by the Company pursuant to the
Series A/B Indenture.

     "Stock Payment" means, with respect to any Person, (a) the declaration or
payment by such Person, either in cash or in property, of any dividend on
(except, in the case of the Company, dividends payable solely in Qualified
Capital Stock of the Company), or the making by such Person or any of its
subsidiaries of any other distribution in respect of, such Person's Capital
Stock or any warrants, rights or options to purchase or acquire shares of any
class of such Capital Stock (except for the issuance of Qualified Capital Stock
pursuant to the exercise thereof), or (b) the redemption, repurchase, retirement
or other acquisition for value by such Person or any of its subsidiaries,
directly or indirectly, of such Person's or any of its subsidiaries' Capital
Stock or any warrants, rights or options to purchase or acquire shares of any
class of such Capital Stock other than, in the case of the Company, through the
issuance in exchange therefor solely of Qualified Capital Stock of the Company;
provided, however, that in the case of a Subsidiary, the term "Stock Payment"
shall not include (i) any such payment with respect to its Capital Stock or
warrants, rights or options to purchase or acquire shares of any class of its
Capital Stock payable to the Company or a Wholly Owned Subsidiary, or (ii) the
payment of pro rata dividends to holders of minority interests in Capital Stock
of a Subsidiary.

     A "subsidiary" of any Person means (i) a corporation a majority of whose
Voting Stock is at the time, directly or indirectly, owned by such Person, by
one or more wholly-owned subsidiaries of such Person or by such Person and one
or more wholly-owned subsidiaries of such Person, (ii) a partnership in which
such Person or a wholly-owned subsidiary of such Person is, at the date of
determination, a general or limited partner of such partnership, but only if
such Person or its wholly-owned subsidiary is entitled to receive more than
fifty percent of the assets of such partnership upon its dissolution, or (iii)
any other Person (other than a corporation or partnership) in which such Person,
a wholly-owned subsidiary of such Person or such Person and one or more wholly-
owned subsidiaries of such Person, directly or indirectly, at the date of
determination thereof, has (x) at least a majority ownership interest or (y) the
power to elect or direct the election of a majority of the directors or other
governing body of such Person.

     "Subsidiary" means any subsidiary of the Company; provided, that an
Unrestricted Subsidiary shall not be deemed a subsidiary of the Company for
purposes of the Indenture.

                                       58
<PAGE>
 
     "Subsidiary Guarantor" means (i) Calumet Florida, Inc., a Delaware
corporation, Plains Illinois Inc., a Delaware corporation, Plains Marketing &
Transportation Inc., a Delaware corporation, Plains Resources International
Inc., a Delaware corporation, PMCT Inc., a Delaware corporation, PLX Crude Lines
Inc., a Delaware corporation, PLX Ingleside Inc., a Delaware corporation,
Stocker Resources, Inc., a California corporation, Stocker Resources, L.P., a
California limited partnership, and Plains Terminal & Transfer Corporation, a
Delaware corporation, (ii) each of the Company's Subsidiaries that becomes a
guarantor of the Notes in compliance with the provisions of the Indenture and
(iii) each of the Company's Subsidiaries executing a supplemental indenture in
which such Subsidiary agrees to be bound by the terms of the Indenture.

     "Unrestricted Subsidiary" means (1) any subsidiary of the Company which at
the time of determination shall be an Unrestricted Subsidiary (as designated by
the Board of Directors of the Company, as provided below) and (2) any subsidiary
of an Unrestricted Subsidiary.  The Board of Directors of the Company may
designate any subsidiary of the Company (including any newly acquired or newly
formed subsidiary or a Person becoming a subsidiary through merger or
consolidation or Investment therein) to be an Unrestricted Subsidiary only if:
(A) such subsidiary does not own any Capital Stock of, or own or hold any Lien
on any property of, any other subsidiary of the Company which is not a
subsidiary of the subsidiary to be so designated or otherwise an Unrestricted
Subsidiary; (B) all the Indebtedness of such subsidiary shall at the date of
designation, and will at all times thereafter consist of, Non-Recourse
Indebtedness; (C) the Company certifies that such designation complies with the
"Limitation on Restricted Payments" covenant; and (D) such subsidiary, either
alone or in the aggregate with all other Unrestricted Subsidiaries, does not
operate, directly or indirectly, all or substantially all of the business of the
Company and the Subsidiaries.  Any such designation by the Board of Directors of
the Company shall be evidenced to the Trustee by filing with the Trustee a Board
Resolution of the Board of Directors of the Company giving effect to such
designation and an Officers' Certificate certifying that such designation
complied with the foregoing conditions.  If, at any time, such 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 as of such date.  The Board of Directors of the  Company
may designate any Unrestricted Subsidiary to be a Subsidiary; provided that
immediately after giving effect to such designation, the Company could incur at
least $1.00 of additional Indebtedness (excluding Permitted Indebtedness)
pursuant to the first paragraph of the "Limitation on Incurrence of Additional
Indebtedness" covenant on a pro forma basis taking into account such
designation.

     "Voting Stock" means, with respect to any Person, securities of any class
or classes of Capital Stock in such Person entitling the holders thereof
(whether at all times or only so long as no senior class of stock has voting
power by reason of any contingency) to vote in the election of members of the
board of directors or other governing body of such Person.

     "Wholly Owned Subsidiary" means a Subsidiary all the Capital Stock (other
than directors' qualifying shares, if applicable) of which is owned by the
Company or another Wholly Owned Subsidiary.

                                       59
<PAGE>
 
                             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. The 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
Outstanding Notes where such Outstanding Notes were acquired as a result of
market-making activities or other trading activities. The Company has agreed
that for a period of 90 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 ________, 1997, all
dealers effecting transactions in the Exchange Notes may be required to deliver
a prospectus.

     The Company will not receive any proceeds from any sales of the 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 purchase or to or through brokers or dealer who may
receive compensation in the form of commissions or concessions from any such
broker-dealer and/or the purchasers of any such Exchange Notes.  Any broker-
dealer that resells the 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 commissions or concessions received by any
such persons may be deemed to be underwriting compensation under the Securities
Act.  A broker-dealer that delivers such a prospectus to purchasers in
connection with such resales will be subject to certain of the civil liability
provisions under the Securities Act and will be bound by the provisions of the
Registration Rights Agreement (including certain indemnification rights and
obligations).

     For a period of 90 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 certain expenses
incident to the Exchange Offer, other than commissions or concession 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.

     By acceptance of this Exchange Offer, each broker-dealer that receives
Exchange Notes for its own account pursuant to the Exchange Offer agrees that,
upon receipt of notice from the Company of the happening of any event which
makes any statement in the Prospectus untrue in any material respect or which
request the making of any changes in the Prospectus in order to make the
statements therein not misleading (which notice the Company agrees to deliver
promptly to such broker-dealer), such broker-dealer will suspend use of the
Prospectus until the Company has amended or supplemented the Prospectus to
correct such misstatement or omission and has furnished copies of the amended or
supplemental Prospectus to such broker-dealer.  If the Company shall give any
such notice to suspend the use of the Prospectus, it shall extend the 90-day
period referred to above by the number of days during the period from and
including the date of the giving of such notice to and including when broker-
dealers shall have received copies of the supplemented or amended Prospectus
necessary to permit resales of the Exchange Notes.

                                       60
<PAGE>
 
                                 LEGAL MATTERS

     The validity of the Exchange Notes will be passed upon for the Company by
Michael R. Patterson, Esq., its general counsel.  Mr. Patterson beneficially
owns 115,603 shares of the Company's Common Stock.

                                    EXPERTS

     The Consolidated Financial Statements of the Company as of December 31,
1996 and 1995, and for each of the three years in the period ended December 31,
1996, incorporated in this Prospectus by reference, have been so incorporated in
reliance on the report of Price Waterhouse LLP, independent accountants, given
on the authority of said firm as experts in auditing and accounting.

     Information relating to the estimated proved reserves of oil and natural
gas and the related estimates of future net revenues and present values thereof
for certain periods, incorporated by reference into this Prospectus, has been
prepared by Netherland, Sewell & Associates, Inc., H. J. Gruy and Company and
Ryder Scott Company, independent petroleum engineers, and is incorporated by
reference herein in reliance upon the authority of such firms as experts in
petroleum engineering.

                                       61
<PAGE>
 
                                    PART II
                                        
                    INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 20. INDEMNIFICATION OF DIRECTORS AND OFFICERS

     Article Tenth of the Company's Second Restated Certificate of Incorporation
provides that the Company shall indemnify to the full extent authorized or
permitted by law any person made, or threatened to be made, a party to any
action, suit or proceeding (whether civil, criminal or otherwise) by reason of
fact that he, his testator or intestate, is or was a director or officer of the
Company or by reason of the fact that such director or officer, at the request
of the Company, is or was serving any other corporation, partnership, joint
venture, trust, employee benefit plan or other enterprise, in any capacity.  The
rights to indemnification set forth above are not exclusive of any other rights
to which such person may be entitled under any statute, provision of the
Company's Restated Certificate of Incorporation or bylaws, agreements, vote of
stockholders or disinterested directors or otherwise.

     Additionally, Article VIII of the Company's Bylaws provides for mandatory
indemnification to at least the extent specifically allowed by Section 145 of
the General Corporation Law of the State of Delaware (the "GCL").  The Bylaws
generally follow the language of Section 145 of the GCL, but in addition specify
that any director, officer, employee or agent may apply to any court of
competent jurisdiction in the State of Delaware for indemnification to the
extent otherwise permissible under the Bylaws, notwithstanding any contrary
determination denying indemnification made by the Board, by independent legal
counsel, or by the stockholders, and notwithstanding the absence of any
determination with respect to indemnification.  The Bylaws also specify certain
circumstances in which a finding is required that the person seeking
indemnification acted in good faith, for purposes of determining whether
indemnification is available.  Under the Bylaws, a person shall be deemed to
have acted in good faith and in a manner he reasonably believed to be in or not
opposed to the best interests of the Company, or, with respect to any criminal
action or proceeding, to have had no reasonable cause to believe his conduct was
unlawful, if his action is based on the records or books of account of the
Company or another enterprise, or on information supplied to him by the officers
of the Company or another enterprise in the course of their duties, or on the
advice of legal counsel for the Company or another enterprise or on information
or records given or reports made to the Company or another enterprise by an
independent certified public accountant or by an appraiser or other expert
selected with reasonable care by the Company or another enterprise.

     Pursuant to Section 145 of the GCL, the Company generally has the power to
indemnify its current and former directors, officers, employees and agents
against expenses and liabilities incurred by them in connection with any suit to
which they are, or are threatened to be made, a party by reason of their serving
in such positions so long as they acted in good faith and in a manner they
reasonably believed to be in, or not opposed to, the best interests of the
Company, and with respect to any criminal action, they had no reasonable cause
to believe their conduct was unlawful.  With respect to suits by or in the right
of the Company, however, indemnification is generally limited to attorneys' fees
and other expenses and is not available if such person is adjudged to be liable
to the Company unless the court determines that indemnification is appropriate.
The statute expressly provides that the power to indemnify authorized thereby is
not exclusive of any rights granted under any bylaw, agreement, vote of
stockholders or disinterested directors, or otherwise.  The Company also has the
power to purchase and maintain insurance for such persons.

     The above discussion of the Company's Restated Certificate of Incorporation
and Bylaws and Section 145 of the GCL is not intended to be exhaustive and is
qualified in its entirety by each of such documents and such statute.

     The Company has entered into an employment agreement containing
indemnification provisions with Mr. Armstrong, its President and Chief Executive
Officer.  Pursuant to such agreement, the Company has agreed to indemnify and
hold him harmless to the fullest extent permitted by law, from any loss, damage
or liability incurred in the course of his employment. The amount paid by the
Company is reducible by the amount of insurance paid


                                     II-1
<PAGE>
 
to or on behalf of such officer with respect to any event giving rise to
indemnification. Such officer's right to indemnification is to survive his death
or termination of employment and the termination of his employment agreement.
The Board recently authorized employment agreements with Messrs. Egg and
Pefanis, Senior Vice Presidents of the Company, which, as authorized, will have
indemnification provisions substantially the same as those of Mr. Armstrong's
agreement described above.

ITEM 21. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

     (a)  Exhibits

       4+      --  Indenture dated as of July 21, 1997, among Plains Resources
                   Inc., the Subsidiary Guarantors named therein and Texas
                   Commerce Bank National Association, as Trustee (incorporated
                   by reference to Exhibit 4 to the Company's Quarterly Report
                   on Form 10-Q for the quarter ended June 30, 1997).
 
       5+      --  Opinion of Michael R. Patterson, Esq.
       12+     --  Computation of Ratio of Earnings to Fixed Charges.
       23(a)+  --  Consent of Michael R. Patterson, Esq. (contained in 
                   Exhibit 5).
       23(b)+  --  Consent of Price Waterhouse LLP.
       23(c)+  --  Consent of Netherland, Sewell & Associates, Inc.
       23(d)+  --  Consent of H. J. Gruy and Company.
       23(e)+  --  Consent of Ryder Scott Company.
       24+     --  Powers of Attorney (contained on pages 4 through 15 of 
                   this Registration Statement).
       25*     --  Statement of Eligibility of Trustee.
       99+     --  Form of Letter of Transmittal.
___________
+Filed herewith.
*To be filed by Amendment.

ITEM 22. UNDERTAKINGS

     (a)  The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to Section 15(d) of the Exchange Act) that is
incorporated by reference in the registration statement 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.

     (b)  The undersigned registrant hereby undertakes to respond to requests
for information that is incorporated by reference into the prospectus pursuant
to Items 4, 10(b), 11, or 13 of Form S-4 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.

     (c)  The undersigned registrant hereby undertakes 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.

     (d)  Insofar as indemnification for liabilities arising under the
Securities Act may be permitted to directors, officers and controlling persons
of the registrant pursuant to the provisions described in Item 15 above, or
otherwise, the registrant has been advised that in the opinion of the Commission
such indemnification is against public policy as expressed in the Securities 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 registrant
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 registrant will, unless 


                                     II-2
<PAGE>
 
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 policy as expressed in the Securities Act
and will be governed by the final adjudication of such issue.


                                     II-3
<PAGE>
 
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Phillip D. Kramer and Michael R. Patterson, and
each of them, either one of whom may act without joinder of the other, his true
and lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any or all pre- and post- effective amendments to this
Registration Statement, and to file the same, with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, and each of them, or the
substitute or substitutes of any or all of them, may lawfully do or cause to be
done by virtue hereof.

                                  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 Houston, State of Texas,
on the 15th day of August, 1997.

                                   PLAINS RESOURCES INC.
 
 
                                   By: GREG L. ARMSTRONG                
                                   Name:  Greg L. Armstrong              
                                   Title: President and Chief Executive Officer 

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 15th day of August, 1997.

         Signature                              Title
         ---------                              -----

     GREG L. ARMSTRONG        President, Chief Executive Officer and Director
     Greg L. Armstrong                 (Principal Executive Officer)
 
     CYNTHIA A. FEEBACK         Controller and Principal Accounting Officer
     Cynthia A. Feeback
 
     PHILLIP D. KRAMER          Vice President, Chief Financial Officer and
     Phillip D. Kramer            Treasurer (Principal Financial Officer)
 
                                               
     JERRY L. DEES                             Director
     Jerry L. Dees
                                               
     TOM H. DELIMITROS                         Director
     Tom H. Delimitros


                                     II-4
<PAGE>
 
     WILLIAM M. HITCHCOCK                      Director
     William M. Hitchcock

 /s/ DAN M. KRAUSSE
_________________________________ 
       Dan M. Krausse                Chairman of the Board and Director


     JOHN H. LOLLAR                            Director
     John H. Lollar


     ROBERT V. SINNOTT                         Director
     Robert V. Sinnott


                                           
     J. TAFT SYMONDS                           Director
     J. Taft Symonds


                                     II-5
<PAGE>
 
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Phillip D. Kramer and Michael R. Patterson, and
each of them, either one of whom may act without joinder of the other, his true
and lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any or all pre- and post- effective amendments to this
Registration Statement, and to file the same, with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, and each of them, or the
substitute or substitutes of any or all of them, may lawfully do or cause to be
done by virtue hereof.

                                  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 Houston, State of Texas,
on the 15th day of August, 1997.

                                       CALUMET FLORIDA, INC.
 
 
                                       By:  PHILLIP D. KRAMER   
                                       Name:  Phillip D. Kramer 
                                       Title:  Vice President    

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 15th day of August, 1997.

         Signature                              Title
         ---------                              -----

     GREG L. ARMSTRONG                         Director
     Greg L. Armstrong
                            
     MICHAEL WHITAKER            President (Principal Executive Officer) 
     Michael Whitaker


                             
     PHILLIP D. KRAMER                 Vice President and Director 
     Phillip D. Kramer                (Principal Financial Officer)
 
                             
     MICHAEL R. PATTERSON         Vice President, Secretary and Director
     Michael R. Patterson
                            
     CYNTHIA A. FEEBACK          Treasurer (Principal Accounting Officer)
     Cynthia A. Feeback


                                     II-6
<PAGE>
 
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Phillip D. Kramer and Michael R. Patterson, and
each of them, either one of whom may act without joinder of the other, his true
and lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any or all pre- and post- effective amendments to this
Registration Statement, and to file the same, with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, and each of them, or the
substitute or substitutes of any or all of them, may lawfully do or cause to be
done by virtue hereof.

                                  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 Houston, State of Texas,
on the 15th day of August, 1997.

                                       PLAINS ILLINOIS INC.
 
 
                                       By:  PHILLIP D. KRAMER 
                                       Name:  Phillip D. Kramer
                                       Title:  Vice President 
                                                (Principal Financial Officer) 

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 15th day of August, 1997.

         Signature                              Title
         ---------                              -----

     GREG L. ARMSTRONG                         Director 
     Greg L. Armstrong
                        
     PHILIP E. HART             President (Principal Executive Officer) 
     Philip E. Hart
                                        
     WILLIAM C. EGG, JR.                       Director
     William C. Egg, Jr.
                        
     MICHAEL R. PATTERSON        Vice President, Secretary and Director 
     Michael R. Patterson                                            
                                                                
     CYNTHIA A. FEEBACK         Treasurer (Principal Accounting Officer) 
     Cynthia A. Feeback


                                     II-7
<PAGE>
 
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Phillip D. Kramer and Michael R. Patterson, and
each of them, either one of whom may act without joinder of the other, his true
and lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any or all pre- and post- effective amendments to this
Registration Statement, and to file the same, with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, and each of them, or the
substitute or substitutes of any or all of them, may lawfully do or cause to be
done by virtue hereof.

                                  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 Houston, State of Texas,
on the 15th day of August, 1997.

                                  PLAINS MARKETING & TRANSPORTATION INC.
 
 
                                  By: PHILLIP D. KRAMER           
                                  Name:  Phillip D. Kramer        
                                  Title:  Vice President and Chief 
                                           Financial Officer 

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 15th day of August, 1997.

         Signature                              Title
         ---------                              -----

                                               Director
     GREG L. ARMSTRONG    
     Greg L. Armstrong    
                                        President and Director 
     HARRY N. PEFANIS                (Principal Executive Officer)  
     Harry N. Pefanis                    
                          
                          
                          
     MICHAEL R. PATTERSON        Vice President, Secretary and Director 
     Michael R. Patterson 
                          
     CYNTHIA A. FEEBACK           Treasurer (Principal Accounting Officer) 
     Cynthia A. Feeback 


                                     II-8
<PAGE>
 
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Phillip D. Kramer and Michael R. Patterson, and
each of them, either one of whom may act without joinder of the other, his true
and lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any or all pre- and post- effective amendments to this
Registration Statement, and to file the same, with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, and each of them, or the
substitute or substitutes of any or all of them, may lawfully do or cause to be
done by virtue hereof.

                                  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 Houston, State of Texas,
on the 15th day of August, 1997.

                                  PLAINS RESOURCES INTERNATIONAL INC.
 
 
                                  By:  PHILLIP D. KRAMER                  
                                  Name:  Phillip D. Kramer               
                                  Title:  Vice President 
                                           (Principal Financial Officer) 

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 15th day of August, 1997.

         Signature                              Title
         ---------                              -----




                                                               
     WILLIAM M. HITCHCOCK          President and Chief Executive Officer 
     William M. Hitchcock 
                                                 
     GREG L. ARMSTRONG                         Director 
     Greg L. Armstrong    
                                                          
     PHILLIP D. KRAMER                Vice President and Director 
     Phillip D. Kramer    
                          
     MICHAEL R. PATTERSON         Vice President, Secretary and Director 
     Michael R. Patterson 
                          
     CYNTHIA A. FEEBACK           Treasurer (Principal Accounting Officer) 
     Cynthia A. Feeback 


                                     II-9
<PAGE>
 
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Phillip D. Kramer and Michael R. Patterson, and
each of them, either one of whom may act without joinder of the other, his true
and lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any or all pre- and post- effective amendments to this
Registration Statement, and to file the same, with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, and each of them, or the
substitute or substitutes of any or all of them, may lawfully do or cause to be
done by virtue hereof.

                                   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 Houston, State of Texas,
on the 15th day of August, 1997.

                                  PMCT INC.
 
 
                                  By:  PHILLIP D. KRAMER
                                  Name:  Phillip D. Kramer
                                  Title:  Vice President and 
                                           Chief Financial Officer 

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 15th day of August, 1997.

         Signature                              Title
         ---------                              -----

     HARRY N. PEFANIS          President (Principal Executive Officer)
     Harry N. Pefanis                      and Director
                          
                          
     PHILLIP D. KRAMER         Vice President, Chief Financial Officer
     Phillip D. Kramer                     and Director
                          
                          
     MICHAEL R. PATTERSON       Vice President, Secretary and Director
     Michael R. Patterson 
                          
     CYNTHIA A. FEEBACK         Treasurer (Principal Accounting Officer)
     Cynthia A. Feeback


                                     II-10
<PAGE>
 
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Phillip D. Kramer and Michael R. Patterson, and
each of them, either one of whom may act without joinder of the other, his true
and lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any or all pre- and post- effective amendments to this
Registration Statement, and to file the same, with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, and each of them, or the
substitute or substitutes of any or all of them, may lawfully do or cause to be
done by virtue hereof.

                                   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 Houston, State of Texas,
on the 15th day of August, 1997.

                                  PLX CRUDE LINES INC.
 
 
                                  By:  PHILLIP D. KRAMER 
                                  Name:  Phillip D. Kramer
                                  Title:  Vice President 
                                           (Principal Financial Officer) 

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 15th day of August, 1997.

         Signature                              Title
         ---------                              -----

     GREG L. ARMSTRONG                         Director
     Greg L. Armstrong  
                         
     PHILLIP D. KRAMER                Vice President and Director
     Phillip D. Kramer  
                         
     HARRY N. PEFANIS                    President and Director 
     Harry N. Pefanis                 (Principal Executive Officer)  
                                      
                        
                         
     CYNTHIA A. FEEBACK           Treasurer (Principal Accounting Officer)
     Cynthia A. Feeback


                                    II-11
     
<PAGE>
 
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Phillip D. Kramer and Michael R. Patterson, and
each of them, either one of whom may act without joinder of the other, his true
and lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any or all pre- and post- effective amendments to this
Registration Statement, and to file the same, with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, and each of them, or the
substitute or substitutes of any or all of them, may lawfully do or cause to be
done by virtue hereof.

                                   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 Houston, State of Texas,
on the 15th day of August, 1997.

                                  PLX INGLESIDE INC.                        
                                                                            
                                                                            
                                  By:  PHILLIP D. KRAMER                    
                                  Name:  Phillip D. Kramer                  
                                  Title:  Vice President and 
                                           Chief Financial Officer 

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 15th day of August, 1997.

         Signature                              Title
         ---------                              -----


     GREG L. ARMSTRONG                         Director  
     Greg L. Armstrong                
                           
     MICHAEL R. PATTERSON      Vice President, Secretary and Director 
     Michael R. Patterson              


     HARRY N. PEFANIS                    President and Director       
     Harry N. Pefanis                 (Principal Executive Officer) 
                          
                                     
                           
     CYNTHIA A. FEEBACK          Treasurer (Principal Accounting Officer) 
     Cynthia A. Feeback    

                                     II-12
<PAGE>
 
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Phillip D. Kramer and Michael R. Patterson, and
each of them, either one of whom may act without joinder of the other, his true
and lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any or all pre- and post- effective amendments to this
Registration Statement, and to file the same, with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, and each of them, or the
substitute or substitutes of any or all of them, may lawfully do or cause to be
done by virtue hereof.

                                   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 Houston, State of Texas,
on the 15th day of August, 1997.

                                        STOCKER RESOURCES, INC.          
                                                                        
                                                                        
                                        By:                             
                                        Name:  Phillip D. Kramer        
                                        Title:  Vice President and      
                                                 Chief Financial Officer 

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 15th day of August, 1997.

         Signature                                Title
         ---------                                -----

/s/ LARRY T. MORTON                         
 ............................... 
       Larry T. Morton              President and Chief Executive Officer 
                                        
/s/ GREG L. ARMSTRONG
 ...............................                           
       Greg L. Armstrong                         Director 
                                        
/s/ WILLIAM C. EGG, JR.
 ...............................                           
       William C. Egg, Jr.                       Director 
                           
/s/ MICHAEL R. PATTERSON
 ...............................                           
     Michael R. Patterson          Vice President, Secretary and Director 
                           
/s/ CYNTHIA A. FEEBACK    
 ............................... 
     Cynthia A. Feeback            Treasurer (Principal Accounting Officer) 


                                     II-13
<PAGE>
 
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Phillip D. Kramer and Michael R. Patterson, and
each of them, either one of whom may act without joinder of the other, his true
and lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any or all pre- and post- effective amendments to this
Registration Statement, and to file the same, with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, and each of them, or the
substitute or substitutes of any or all of them, may lawfully do or cause to be
done by virtue hereof.

                                   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 Houston, State of Texas,
on the 15th day of August, 1997.

                                       PLAINS TERMINAL & TRANSFER CORPORATION   
                                                                             
                                                                             
                                       By:  PHILLIP D. KRAMER                
                                       Name:  Phillip D. Kramer              
                                       Title:  Vice President                
                                                (Principal Financial Officer) 

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 15th day of August, 1997.

         Signature                              Title
         ---------                              -----
                                  
GREG L. ARMSTRONG                              Director     
Greg L. Armstrong
                        
HARRY N. PEFANIS              President and Director (Chief Executive Officer) 
Harry N. Pefanis
                            
CYNTHIA A. FEEBACK                Treasurer (Principal Accounting Officer) 
Cynthia A. Feeback
                          
PHILLIP D. KRAMER               Vice President (Principal Financial Officer) 
Phillip D. Kramer
                             
MICHAEL R. PATTERSON               Vice President, Secretary and Director 
Michael R. Patterson


                                     II-14
<PAGE>
 
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Phillip D. Kramer and Michael R. Patterson, and
each of them, either one of whom may act without joinder of the other, his true
and lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any or all pre- and post- effective amendments to this
Registration Statement, and to file the same, with all exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, and each of them, or the
substitute or substitutes of any or all of them, may lawfully do or cause to be
done by virtue hereof.

                                   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 Houston, State of Texas,
on the 15th day of August, 1997.

                                 STOCKER RESOURCES, L.P., BY STOCKER RESOURCES,
                                  INC., ITS GENERAL PARTNER                    
                                                                               
                                                                               
                                 By:  PHILLIP D. KRAMER                        
                                 Name:  Phillip D. Kramer                      
                                 Title:  Vice President and                    
                                          Chief Financial Officer              

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 15th day of August, 1997.

         Signature                              Title
         ---------                              -----
                         
     LARRY T. MORTON             President and Chief Executive Officer 
     Larry T. Morton      
                                        
     GREG L. ARMSTRONG                         Director
     Greg L. Armstrong                          
                                                
     WILLIAM C. EGG, JR.                       Director 
     William C. Egg, Jr.  
                           
     MICHAEL R. PATTERSON      Vice President, Secretary and Director 
     Michael R. Patterson 
                           
     CYNTHIA A. FEEBACK        Treasurer (Principal Accounting Officer) 
     Cynthia A. Feeback 


                                     II-15
<PAGE>
 
                               INDEX TO EXHIBITS

<TABLE> 
<CAPTION> 
SEQUENTIAL                                                                                 
 EXHIBIT                                                                                   NUMBERED
 NUMBER                                                                                      PAGE
   <C>     <S>                                                                             <C>
   4       --  Indenture dated as of June 21, 1997, among Plains Resources Inc.,
               the Subsidiary Guarantors named therein and Texas Commerce Bank
               National Association, as Trustee (incorporated by reference to
               Exhibit 4 to the Company's Quarterly Report on Form 10-Q for the
               quarter ended June 30, 1997).
   5+      --  Opinion of Michael R. Patterson, Esq.
   12+     --  Computation of Ratio of Earnings to Fixed Charges.
   23(a)+  --  Consent of Michael R. Patterson, Esq. (contained in Exhibit 5).
   23(b)+  --  Consent of Price Waterhouse LLP.
   23(c)+  --  Consent of Netherland, Sewell & Associates, Inc.
   23(d)+  --  Consent of H. J. Gruy and Company.
   23(e)+  --  Consent of Ryder Scott Company.
   24+     --  Powers of Attorney (contained on pages 4 through 15 of this
               Registration Statement).
   25*     --  Statement of Eligibility of Trustee.
   99+     --  Form of Letter of Transmittal.
</TABLE> 
_________
+Filed herewith.
*To be filed by Amendment.


<PAGE>
 
                                                                       EXHIBIT 5

                                August 13, 1997


Plains Resources Inc.
Calumet Florida, Inc.
Plains Illinois Inc.
Plains Marketing & Transportation Inc.
Plains Resources International Inc.
Plains Terminal & Transfer Corporation
PMCT INC.
PLX Crude Lines Inc.
PLX Ingleside Inc.
Stocker Resources, Inc.
Stocker Resources L.P.
1600 Smith Street
Houston, Texas 77002

Dear Sirs:

     I have acted as counsel for Plains Resources Inc., a Delaware corporation
(the "Company"), and the Guarantors (defined below) in connection with the
proposed offer by the Company to exchange (the "Exchange Offer") for all
outstanding 10 1/4% Senior Subordinated Notes Due 2006, Series C ($50 million
principal amount outstanding) (the "Outstanding Notes") 10 1/4% Senior
Subordinated Notes Due 2006, Series D ($50 million principal amount) (the
"Exchange Notes").  The Outstanding Notes have been, and the Exchange Notes will
be, issued pursuant to an Indenture dated as of July 21, 1997, (the
"Indenture"), among the Company, the Guarantors and Texas Commerce Bank National
Association, as trustee (the "Trustee").  Calumet Florida, Inc., Plains Illinois
Inc., Plains Marketing & Transportation Inc., Plains Resources International
Inc., Plains Terminal & Transfer Corporation, PMCT INC., PLX Crude Lines Inc.,
PLX Ingleside Inc., Stocker Resources, Inc., and Stocker Resources L.P. are
collectively referred to as the "Guarantors", and the guarantees by the
Guarantors with respect to the Exchange Notes are collectively referred to as
the "Guarantees".

     In connection with such matters I have examined the Indenture, the
Registration Statement on Form S-4, filed by the Company with the Securities and
Exchange Commission, for the registration of the Exchange Notes and the
Guarantees thereof (collectively referred to as the "Securities") under the
Securities Act of 1933 (the Registration Statement as amended at the time it
becomes effective being referred to as the "Registration Statement") and such
corporate records of the Company and the Guarantors, certificates of public
officials and such other documents as I have deemed necessary or appropriate for
the purpose of this opinion.

     Based upon the foregoing, subject to the qualifications hereinafter set
forth, and having regard for such legal considerations as I deem relevant, I am
of the opinion that:

     (i)   The Company has been duly incorporated and is validly existing as a
           corporation in good standing under the laws of the State of Delaware;

     (ii)  Each of the Guarantors has been duly incorporated or organized and is
           validly existing as a corporation or partnership in good standing
           under the laws of the jurisdiction in which it is incorporated or
           organized; and

     (iii) The Securities proposed to be issued pursuant to the Exchange Offer
           have been duly authorized for issuance and, subject to the
           Registration Statement becoming effective under the Securities Act of
           1933, and to compliance with any applicable state securities laws,
           when issued, delivered and sold in accordance with the Exchange Offer
           and the
<PAGE>
 
           Indenture, will be valid and legally binding obligations of the
           Company and the Guarantors, enforceable against the Company and the
           Guarantors in accordance with their respective terms.

     The opinions expressed herein are subject to the following:

     .    The enforceability of the Securities may be limited or affected by (i)
          bankruptcy, insolvency, reorganization, moratorium, liquidation,
          rearrangement, fraudulent transfer, fraudulent conveyance and other
          similar laws (including court decisions) now or hereafter in effect
          and affecting the rights and remedies of creditors generally or
          providing for the relief of debtors, (ii) the refusal of a particular
          court to grant equitable remedies, including without limitation,
          specific performance and injunctive relief, and (iii) general
          principles of equity (regardless of whether such remedies are sought
          in a proceeding in equity or at law).

     .    I express no opinion as to the enforceability of any provisions of the
          Securities that would require the performance thereof in the presence
          of fraud or illegality on the part of the holders of the Securities or
          the Trustee.

     The opinions expressed herein are limited exclusively to the laws of the
State of Texas and the General Corporation Law of the State of Delaware.

     I hereby consent to the filing of this opinion as an Exhibit to the
Registration Statement and to the reference to me under "Legal Matters" in the
Prospectus forming a part of the Registration Statement.

                                            Sincerely,

 
                                             /s/ Michael R. Patterson
                                            ____________________________________
                                            Michael R. Patterson
                                            Vice President & General Counsel

<PAGE>
 
                                                                      EXHIBIT 12

- --------------------------------------------------------------------------------
Plains Resources Inc.
- --------------------------------------------------------------------------------
Computation of Ratios
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
                                  1992      1993       1994      1995      1996
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Ratio of earnings to combined
- --------------------------------------------------------------------------------
   fixed charges:
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
Net Income(loss) before         (3,308)   (20,198)      571     2,652    17,754
 income taxes
- --------------------------------------------------------------------------------
Fixed charges:
- --------------------------------------------------------------------------------
   Interest expense              3,776      8,847    12,585    13,606    17,286
- --------------------------------------------------------------------------------
   Capitalized interest          1,498      4,303     2,728     3,093     3,613
- --------------------------------------------------------------------------------
   Interest portion of rentals     108        118       110       109       102
- --------------------------------------------------------------------------------
   Amortization of debt issue      549        922       993     1,128     1,176
    costs
- --------------------------------------------------------------------------------
Total fixed charges              5,931     14,190    16,416    17,936    22,177
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
   Less capitalized interest    (1,498)    (4,303)   (2,728)   (3,093)   (3,613)
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
Earnings before income taxes,
- --------------------------------------------------------------------------------
   and fixed charges           $ 1,125   $(10,311)  $14,259   $17,495   $36,318
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
Ratio of earnings to fixed         0.2       -0.7       0.9       1.0       1.6
 charges
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
Earnings in excess of 
 (required to cover)
- --------------------------------------------------------------------------------
      Fixed Charges            $(4,806)  $(24,501)  $(2,157)  $  (441)  $14,141
================================================================================

<PAGE>
 
                                                                   EXHIBIT 23(b)


                      CONSENT OF INDEPENDENT ACCOUNTANTS


      We hereby consent to the incorporation by reference in the Prospectus
constituting part of this Registration Statement on Form S-4 of Plains Resources
Inc. of our report dated February 10, 1997 appearing on page F-1 of Plains
Resources Inc.'s Annual Report on Form 10-K for the year ended December 31,
1996.  We also consent to the reference to us under the heating "Experts" in
such Prospectus.


PRICE WATERHOUSE LLP

Houston, Texas
August 12, 1997

<PAGE>
 
                                                                   EXHIBIT 23(c)


           CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS


      We hereby consent to the incorporation by reference in this Registration
Statement on Form S-4 of our reserve report to the interest of Plains Resources
Inc. and Subsidiary (collectively the Company) dated January 31, 1997, relating
to the estimated quantities of certain of the Company's proved reserves of oil
and gas and the related estimates of future net revenue and present values
thereof for certain periods, included in the Company's Annual Report on Form 10-
K for the year ended December 31, 1996, as well as in the Notes to the
Consolidated Financial Statements of the Company in such annual report.  We also
consent to the reference to us under the heading "Experts" in such Registration
Statement.


                                       NETHERLAND, SEWELL & ASSOCIATES, INC.


                                       /s/ Frederic D. Sewell
                                       _____________________________________
                                       Frederic D. Sewell
                                       President


Dallas, Texas
August 13, 1997

<PAGE>
 
                                                                   EXHIBIT 23(d)


                  CONSENT OF INDEPENDENT PETROLEUM ENGINEERS


      H. J. Gruy and Associates, Inc. hereby consent to the incorporation by
reference in this Registration Statement on Form S-4 of our reserve report dated
February 7, 1997, relating to the estimated quantities of certain of the
Company's proved reserves of oil and gas and the related estimates of future net
revenue and present values thereof for certain periods, included in the
Company's Annual Report on Form 10-K foro the year ended December 31, 1996, as
well as in the Notes to the Consolidated Financial Statements of the Company in
such annual report.  We also consent to the reference to us under the heating
"Experts" in such Registration Statement.


                                       H. J. GRUY AND ASSOCIATES, INC.


                                       /s/ H. J. GRUY AND ASSOCIATES, INC.
                                       ____________________________________



Houston, Texas
August 12, 1997

<PAGE>
 
                                                                   EXHIBIT 23(e)


                  CONSENT OF INDEPENDENT PETROLEUM ENGINEERS


      We hereby consent to the incorporation by reference in this Registration
Statement on Form S-4 of our reserve report dated February 4, 1997, relating to
the estimated quantities of proved reserves of oil and gas attributable to
certain interests of Plains Resources Inc. (the Company) and the related
estimates of future net income and discounted future net income for certain
periods, included in the Company's Annual Report on Form 10-K for the year ended
December 31, 1996, as well as in the Notes to the Consolidated Financial
Statements of the Company in such annual report.  We also consent to the
reference to us under the heading "Experts" in such Registration Statement.


                              RYDER SCOTT PETROLEUM ENGINEERS COMPANY


                              /s/ RYDER SCOTT PETROLEUM ENGINEERS COMPANY
                              ____________________________________________



Houston, Texas
August 12, 1997

<PAGE>
 
                                                                      EXHIBIT 99

                                    FORM OF
                             LETTER OF TRANSMITTAL

                             PLAINS RESOURCES INC.

   Offer to Exchange its 10 1/4% Senior Subordinated Notes due 2006, Series D
                       for any and all of its outstanding
              10 1/4% Senior Subordinated Notes due 2006, Series C


           ---------------------------------------------------------
            THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT
               5:00 P.M., NEW YORK CITY TIME, ON ________, 1997,
                         UNLESS THE OFFER IS EXTENDED
           ---------------------------------------------------------

              Deliver to Texas Commerce Bank National Association
                             (the "Exchange Agent")

BY REGISTERED OR CERTIFIED MAIL:           BY OVERNIGHT MAIL OR HAND:
Texas Commerce Bank National              Texas Commerce Bank National
       Association                                Association
 Attention: Frank Ivins, Registered Bond  Attention: Frank Ivins, Registered 
  Events, Personal and Confidential                    Bond
       P.O. Box 2320                      Events, Personal and Confidential
  Dallas, Texas  75221-2320                  1201 Main Street, 18th Floor
                                                 Dallas, Texas  75202

                            BY FACSIMILE TRANSMISSION
                        (FOR ELIGIBLE INSTITUTIONS ONLY):
                     Texas Commerce Bank National Association
                                  (214) 672-5746
                             Confirm: (800) 275-2048


     DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE OR
TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE NUMBER OTHER THAN THE ONES LISTED
ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.  THE INSTRUCTIONS ACCOMPANYING THIS
LETTER OF TRANSMITTAL SHOULD BE READ CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL
IS COMPLETED.

     The undersigned hereby acknowledges receipt of the Prospectus dated
________, 1997 (the "Prospectus") of Plains Resources Inc. (the "Company") and
this Letter of Transmittal, which together constitute the Company's offer (the
"Exchange Offer") to exchange $1,000 principal amount of its 10 1/4% Senior
Subordinated Notes due 2006, Series D (the "Exchange Notes"), which have been
registered under the Securities Act of 1933, as amended (the "Securities Act"),
pursuant to a Registration Statement of which the Prospectus is a part, for each
$1,000 principal amount of its outstanding 10 1/4% Senior Subordinated Notes due
2006, Series C (the "Notes").  The term "Expiration Date" shall mean 5:00 p.m.,
New York City time, on ________, 1997, unless the Company, in its sole
discretion, extends the Exchange Offer, in which case the term shall mean the
latest date and time to which the Exchange Offer is extended.
<PAGE>
 
Capitalized terms used but not defined herein have the meaning given to them in
the Prospectus.


     YOUR BANK OR BROKER CAN ASSIST YOU IN COMPLETING THIS FORM.  THE
INSTRUCTIONS INCLUDED WITH THIS LETTER OF TRANSMITTAL MUST BE FOLLOWED.
QUESTIONS RELATING TO THE PROCEDURE FOR TENDERING AND REQUESTS FOR ADDITIONAL
COPIES OF THE PROSPECTUS AND THIS LETTER OF TRANSMITTAL MAY BE DIRECTED TO THE
EXCHANGE AGENT.  QUESTIONS RELATING TO THE EXCHANGE OFFER AND REQUESTS FOR
ASSISTANCE OR FOR ADDITIONAL COPIES OF THE PROSPECTUS AND THIS LETTER OF
TRANSMITTAL MAY BE DIRECTED TO THE COMPANY.

     List below the Notes to which this Letter of Transmittal relates.  If the
space indicated below is inadequate, the Certificate Numbers and Principal
amounts should be listed on a separately signed schedule affixed hereto.

<TABLE>
<CAPTION>
=========================================================================================================== 
                              DESCRIPTION OF NOTES TENDERED HEREBY
- -----------------------------------------------------------------------------------------------------------
<S>                                                <C>           <C>                  <C>
                                                                    Aggregate Principal            
Name(s) and Address(es) of Registered Holder(s)                            Amount               Principal
 Exactly as Name(s) Appear(s) on Notes             Registration        Represented by            Amount
        (Please fill in)                             Numbers*              Notes                Tendered**
- -----------------------------------------------------------------------------------------------------------  
                                                ___________________________________________________________ 
                                                ___________________________________________________________ 
                                                ___________________________________________________________ 
                                                ___________________________________________________________ 
                                                ___________________________________________________________ 
                                                Total
===========================================================================================================
</TABLE>

*  Need not be completed by book-entry Holders.
** Unless otherwise indicated, the holder will be deemed to have tendered the
   full aggregate principal amount represented by such Notes. All tenders must
   be in integral multiples of $1,000.
 
     This Letter of Transmittal is to be used (i) if certificates of Notes are
to be forwarded herewith, (ii) if delivery of Notes is to be made by book-entry
transfer to an account maintained by the Exchange Agent at The Depository Trust
Company ("DTC"), pursuant to the procedures set forth in "The Exchange Offer--
Procedures for Tendering" in the Prospectus or (iii) tender of the Notes is to
be made according to the guaranteed delivery procedures described in the
Prospectus under the caption "The Exchange Offer--Guaranteed Delivery
Procedures."  See Instruction 2.  Delivery of documents to a book-entry transfer
facility does not constitute delivery to the Exchange Agent.  It is understood
that participants in DTC's book-entry system will, in accordance with DTC's
Automated Tender Offer Program procedures and in lieu of physical delivery to
the Exchange Agent of a Letter of Transmittal, electronically acknowledge
receipt of, and agreement to be bound by, the terms of this Letter of
Transmittal.

     The term "Holder" with respect to the Exchange Offer means any person in
whose name Notes are registered on the books of the Company or any other person

                                       2
<PAGE>
 
who has obtained a properly completed bond power from the registered holder. The
undersigned has completed, executed and delivered this Letter of Transmittal to
indicate the action the undersigned desires to take with respect to the Exchange
Offer. Holders who wish to tender their Notes must complete this letter in its
entirety.

[ ]  CHECK HERE IF TENDERED NOTES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER
     MADE TO AN ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH A BOOK ENTRY
     TRANSFER FACILITY AND COMPLETE THE FOLLOWING:

Name of Tendering Institution ________________________________________________

[ ]  The Depository Trust Company

Account Number _______________________________________________________________
Transaction Code Number_______________________________________________________

     Holders whose Notes are not immediately available or who cannot deliver
their Notes and all other documents required hereby to the Exchange Agent on or
prior to the Expiration Date must tender their Notes according to the guaranteed
delivery procedure set forth in the Prospectus under the caption "The Exchange
Offer--Guaranteed Delivery Procedures".  See Instruction 2.

[ ]  CHECK HERE IF TENDERED NOTES ARE BEING DELIVERED PURSUANT TO A NOTICE OF
     GUARANTEED DELIVERY AND COMPLETE THE FOLLOWING:

Name(s) of Registered Holder(s)_______________________________________________
Date of Execution of Notice of Guaranteed Delivery____________________________
Name of Eligible Institution that Guaranteed Delivery_________________________
If delivered by book-entry transfer:
     Account Number___________________________________________________________
     Transaction Code Number__________________________________________________

[ ]  CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL
     COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS
     THERETO.

Name__________________________________________________________________________
Address_______________________________________________________________________

                                       3
<PAGE>
 
                       SIGNATURES MUST BE PROVIDED BELOW
              PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY

Ladies and Gentlemen:

          Upon the terms and subject to the conditions of the Exchange Offer,
the undersigned hereby tenders to the Company the principal amount of the Notes
indicated above.  Subject to, and effective upon, the acceptance for exchange of
such Notes tendered hereby, the undersigned hereby exchanges, assigns and
transfers to, or upon the order of, the Company all right, title and interest in
and to such Notes as are being tendered hereby, including all rights to accrued
and unpaid interest thereon as of the Expiration Date.  The undersigned hereby
irrevocably constitutes and appoints the Exchange Agent the true and lawful
agent and attorney-in-fact of the undersigned (with full knowledge that said
Exchange Agent acts as the agent of the Company in connection with the Exchange
Offer) to cause the Notes to be assigned, transferred and exchanged.  The
undersigned represents and warrants that it has full power and authority to
tender, exchange, assign and transfer the Notes and to acquire Exchange Notes
issuable upon the exchange of such tendered Notes, and that when the same are
accepted for exchange, the Company will acquire good and unencumbered title to
the tendered Notes, free and clear of all liens, restrictions, charges and
encumbrances and not subject to any adverse claim.

          The undersigned represents to the Company that (i) the Exchange Notes
acquired pursuant to the Exchange Offer are being obtained in the ordinary
course of business of the person receiving such Exchange Notes, whether or not
such person is the undersigned, and (ii) neither the undersigned nor any such
other person has an arrangement or understanding with any person to participate
in the distribution of such Exchange Notes.  If the undersigned or the person
receiving the Exchange Notes covered hereby is a broker-dealer that is receiving
the Exchange Notes for its own account in exchange for Notes that were acquired
as a result of market-making activities or other trading activities, the
undersigned acknowledges that it or such other person will deliver a prospectus
in connection with any resale of such Exchange Notes.  The undersigned and any
such other person acknowledge that, if they are participating in the Exchange
Offer for the purpose of distributing the Exchange Notes, (i) they cannot rely
on the position of the staff of the Securities and Exchange Commission
enunciated in Exxon Capital Holdings Corporation (available April 13, 1989),
Morgan Stanley & Co., Inc. (available June 5, 1991) or similar no-action letters
and, in the absence of an exemption therefrom, must comply with the registration
and prospectus delivery requirements of the Securities Act in connection with
the resale transaction and (ii) failure to comply with such requirements in such
instance could result in the undersigned or any such other person incurring
liability under the Securities Act for which such persons are not indemnified by
the Company.  If the undersigned or the person receiving the Exchange Notes
covered by this letter is an affiliate (as defined under Rule 405 of the
Securities Act) of the Company, the undersigned represents to the Company that
the undersigned understands and acknowledges that such Exchange Notes may not be
offered for resale, resold or otherwise transferred by the undersigned or such
other person without registration under the Securities Act or an exemption
therefrom.

                                       4
<PAGE>
 
          The undersigned also warrants that it will, upon request, execute and
deliver any additional documents deemed by the Exchange Agent or the Company to
be necessary or desirable to complete the exchange, assignment and transfer of
tendered Notes or transfer ownership of such Notes on the account books
maintained by a Book-Entry Transfer Facility.  The undersigned further agrees
that acceptance of any tendered Notes by the Company and the issuance of
Exchange Notes in exchange therefor shall constitute performance in full by the
Company of its obligations under the Registration Rights Agreement and that the
Company shall have no further obligations or liabilities thereunder for the
registration of the Notes or the Exchange Notes.

          The Exchange Offer is subject to certain conditions set forth in the
Prospectus under the caption "The Exchange Offer -- Conditions."  The
undersigned recognizes that as a result of these conditions (which may be
waived, in whole or in part, by the Company), as more particularly set forth in
the Prospectus, the Company may not be required to exchange any of the Notes
tendered hereby and, in such event, the Notes not exchanged will be returned to
the undersigned at the address shown below the signature of the undersigned.

          All authority herein conferred or agreed to be conferred shall survive
the death or incapacity of the undersigned and every obligation of the
undersigned hereunder shall be binding upon the heirs, personal representatives,
successors and assigns of the undersigned.  Tendered Notes may be withdrawn at
any time prior to the Expiration Date.

          Unless otherwise indicated in the box entitled "Special Registration
Instructions" or the box entitled "Special Delivery Instructions" in this Letter
of Transmittal, certificates for all Exchange Notes delivered in exchange for
tendered Notes, and any Notes delivered herewith but not exchanged, will be
registered in the name of the undersigned and shall be delivered to the
undersigned at the address shown below the signature of the undersigned.  If an
Exchange Note is to be issued to a person other than the person(s) signing this
Letter of Transmittal, or if the Exchange Note is to be mailed to someone other
than the person(s) signing this Letter of Transmittal or to the person(s)
signing this Letter of Transmittal at an address different than the address
shown on this Letter of Transmittal, the appropriate boxes of this Letter of
Transmittal should be completed.  IF NOTES ARE SURRENDERED BY HOLDER(S) THAT
HAVE COMPLETED EITHER THE BOX ENTITLED "SPECIAL REGISTRATION INSTRUCTIONS" OR
THE BOX ENTITLED "SPECIAL DELIVERY INSTRUCTIONS" IN THIS LETTER OF TRANSMITTAL,
SIGNATURE(S) ON THIS LETTER OF TRANSMITTAL MUST BE GUARANTEED BY AN ELIGIBLE
INSTITUTION (SEE INSTRUCTION 4).

                                       5
<PAGE>
 
<TABLE> 
<CAPTION> 
=================================================================================================================================
<S>                                                    <C>  
SPECIAL REGISTRATION INSTRUCTIONS                                             SPECIAL DELIVERY INSTRUCTIONS
      (See Instruction 5)                                                         (See Instruction 5)
 To be completed ONLY if the Exchange Notes are        To be completed ONLY if the Exchange Notes are to be sent to someone other
to be issued in the name of someone other than         than the undersigned, or to the undersigned at an address other than that
the undersigned.                                       shown under "Description of Notes Tendered Hereby."
Issue Exchange Note to:                                Mail Exchange Note to:
Name:___________________________________________       Name:_____________________________________________________________________
Address:________________________________________       Address:__________________________________________________________________
        ________________________________________               __________________________________________________________________
               (Please print or type)                                                   (Please print or type)
================================================================================================================================= 
                                              REGISTERED HOLDER(S) OF NOTES SIGN HERE
                                         (In addition, complete Substitute Form W-9 Below)
 
X________________________________________________________________________________________________________________________________
 
 
X________________________________________________________________________________________________________________________________
                                              (Signature(s) of Registered Holder(s))
        Must be signed by registered holder(s) exactly as name(s) appear(s) on the Notes or on a security position listing as the
owner of the Notes or by person(s) authorized to become registered holder(s) by properly completed bond powers transmitted herewith.
If signature is by attorney-in-fact, trustee, executor, administrator, guardian, officer of a corporation or other person acting in
a fiduciary capacity, please provide the following information (Please print or type): 
Name and Capacity (full title):__________________________________________________________________________________________________

Address (including zip):_________________________________________________________________________________________________________
Area Code and Telephone Number:__________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
Dated:  ___________________________________
 
                                      Signature Guarantee (If required -- See Instruction 4)
 
Authorized Signature:____________________________________________________________________________________________________________
                                       (Signature of Representative of Signature Guarantor)
 
Name and Title:__________________________________________________________________________________________________________________
 
Name of Firm:____________________________________________________________________________________________________________________
 
Area Code and Telephone Number:__________________________________________________________________________________________________
                                                                    (Please print or type)
Dated:  ___________________________________
==================================================================================================================================
</TABLE>

                                       6
<PAGE>
 
            Payor's Name:  Texas Commerce Bank National Association
             THIS SUBSTITUTE FORM W-9 MUST BE COMPLETED AND SIGNED
     Please provide your social security number or other taxpayer identification
number on the following Substitute Form W-9 and certify therein that you are not
subject to backup withholding.
<TABLE>
<CAPTION>

<S>                             <C>                                                               <C>       
 ==================================================================================================================================
         SUBSTITUTE             Part 1 -- Please provide your TIN in the box at right and 
         FORM W-9               certify by signing and dating below.                              _________________________
 Department of the Treasury                                                                             Social Security
  Internal Revenue Service      Part 2 -- Check the box if you are not subject to backup              Number or Employer
                                withholding under the provisions of section                             Identification        
                                3406(a)(1)(C) of the Internal Revenue Code because                           Number
                                (1) you have not been notified that you are subject 
                                to backup withholding as a result of failure to  
                                report all interest or dividends or (2) the Internal       [ ]
                                Revenue Service has notified you that you are no longer 
                                subject to backup withholding.                                    
                                --------------------------------------------------------------------------------------------------
                                Certification: Under the penalties of perjury, I certify that the 
                                information provided on this form is true, correct and complete.               Part 3-- 
Payor's Request for Taxpayer
Identification Number ("TIN")   Signature:__________________________________  Dated:_____________            AWAITING TIN [ ]
- ---------------------------------------------------------------------------------------------------------------------------------- 
NOTE:  FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP WITHHOLDING OF 31% OF ANY CASH PAYMENTS IN EXCESS OF $10.00
       MADE TO YOU.

      YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX IN PART 3 OF SUBSTITUTE FORM W-9.
- ----------------------------------------------------------------------------------------------------------------------------------  

                                         CERTIFICATE OF AWAITING TAX IDENTIFICATION NUMBER
 
 I certify under penalties of perjury that a taxpayer identification number has not been issued to me, and either (a) I have mailed
  or delivered an application to receive a taxpayer identification number to the appropriate Internal Revenue Service Center or
  Social Security Administration Office, or (b) I intend to mail or deliver an application in the near future.  I understand that
  if I do not provide a taxpayer identification number within 60 days, 31% of all reportable payments made to me thereafter will be
  withheld until I provide a number.
 
 __________________________________________________________                                     ____________________________________
                   Signature                                                                                    Date
====================================================================================================================================

</TABLE>

                                       7
<PAGE>
 
                                  INSTRUCTIONS

                         FORMING PART OF THE TERMS AND
                        CONDITIONS OF THE EXCHANGE OFFER

1.   DELIVERY OF THIS LETTER OF TRANSMITTAL AND CERTIFICATES.

     All physically delivered Notes or any confirmation of a book-entry transfer
to the Exchange Agent's account at a Book-Entry Transfer Facility of Notes
tendered by book-entry transfer, as well as a properly completed and duly
executed copy of this Letter of Transmittal or facsimile thereof, and any other
documents required by this Letter of Transmittal, must be received by the
Exchange Agent at any of its addresses set forth herein on or prior to the
Expiration Date (as defined in the Prospectus).  THE METHOD OF DELIVERY OF THIS
LETTER OF TRANSMITTAL, THE NOTES AND ANY OTHER REQUIRED DOCUMENTS IS AT THE
ELECTION AND RISK OF THE HOLDER, AND EXCEPT AS OTHERWISE PROVIDED BELOW, THE
DELIVERY WILL BE DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE EXCHANGE AGENT.
IF SUCH DELIVERY IS BY MAIL, IT IS SUGGESTED THAT REGISTERED MAIL WITH RETURN
RECEIPT REQUESTED, PROPERLY INSURED, BE USED.

     No alternative, conditional, irregular or contingent tenders will be
accepted.  All tendering Holders, by execution of this Letter of Transmittal (or
facsimile thereof), shall waive any right to receive notice of the acceptance of
the Notes for exchange.

DELIVERY TO AN ADDRESS OTHER THAN AS SET FORTH HEREIN, OR INSTRUCTIONS VIA A
FACSIMILE NUMBER OTHER THAN THE ONES SET FORTH HEREIN, WILL NOT CONSTITUTE A
VALID DELIVERY.

2.   GUARANTEED DELIVERY PROCEDURES.  Holders who wish to tender their Notes,
but whose Notes are not immediately available and thus cannot deliver their
Notes, the Letter of Transmittal or any other required documents to the Exchange
Agent (or comply with the procedures for book-entry transfer) prior to the
Expiration Date, may effect a tender if:

     (a)  the tender is made through a member firm of a registered national
          securities exchange or of the National Association of Securities
          Dealers, Inc., a commercial bank or trust company having an office or
          correspondent in the United States or an "eligible guarantor
          institution" within the meaning of Rule 17Ad-15 under the Exchange Act
          (an "Eligible Institution");

     (b)  prior to the Expiration Date, the Exchange Agent receives from such
          Eligible Institution a properly completed and duly executed Notice of
          Guaranteed Delivery (by facsimile transmission, mail or hand delivery)
          setting forth the name and address of the Holder, the registration
          number(s) of such Notes and the principal amount of Notes tendered,
          stating that the tender is being made thereby and guaranteeing that,
          within five New York Stock Exchange trading days after the Expiration
          Date, the Letter of Transmittal (or facsimile thereof), together with
          the Notes (or a confirmation of book-entry transfer of such Notes into
          the Exchange Agent's account at the Book-Entry Transfer Facility) and
          any

                                       8
<PAGE>
 
          other documents required by the Letter of Transmittal, will be
          deposited by the Eligible Institution with the Exchange Agent; and

     (c)  such properly completed and executed Letter of Transmittal (or
          facsimile thereof), as well as all tendered Notes in proper form for
          transfer (or a confirmation of book-entry transfer of such Notes into
          the Exchange Agent's account at the Book-Entry Transfer Facility) and
          all other documents required by the Letter of Transmittal, are
          received by the Exchange Agent within five New York Stock Exchange
          trading days after the Expiration Date.

     Upon request to the Exchange Agent, a Notice of Guaranteed Delivery will be
sent to Holders who wish to tender their Notes according to the guaranteed
delivery procedures set forth above.  Any holder who wishes to tender Notes
pursuant to the guaranteed delivery procedures described above must ensure that
the Exchange Agent receives the Notice of Guaranteed Delivery relating to such
Notes prior to the Expiration Date.  Failure to complete the guaranteed delivery
procedures outlined above will not, of itself, affect the validity or effect a
revocation of any Letter of Transmittal form properly completed and executed by
a Holder who attempted to use the guaranteed delivery procedures.

3.   PARTIAL TENDERS; WITHDRAWALS.

     If less than the entire principal amount of Notes evidenced by a submitted
certificate is tendered, the tendering holder should fill in the principal
amount tendered in the column entitled "Principal Amount Tendered" of the box
entitled "Description of Notes Tendered Hereby".  A newly issued Note for the
principal amount of Notes submitted but not tendered will be sent to such holder
as soon as practicable after the Expiration Date.  All Notes delivered to the
Exchange Agent will be deemed to have been tendered in full unless otherwise
indicated.  Tenders of Notes will be accepted only in integral multiples of
$1,000.

     Notes tendered pursuant to the Exchange Offer may be withdrawn at any time
prior to the Expiration Date, after which tenders of Notes are irrevocable.  To
be effective, a written, telegraphic or facsimile transmission notice of
withdrawal must be timely received by the Exchange Agent.  Any such notice of
withdrawal must (i) specify the name of the person having deposited the Notes to
be withdrawn (the "Depositor"), (ii) identify the Notes to be withdrawn
(including the registration number(s) and principal amount of such Notes, or, in
the case of Notes transferred by book-entry transfer, the name and number of the
account at the Book-Entry Transfer Facility to be credited), (iii) be signed by
the Holder in the same manner as the original signature on this Letter of
Transmittal (including any required signature guarantees) or be accompanied by
documents of transfer sufficient to have the Trustee with respect to the Notes
register the transfer of such Notes into the name of the person withdrawing the
tender and (iv) specify the name in which any such Notes are to be registered,
if different from that of the Depositor.  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 Notes so withdrawn will be deemed not to have been validly tendered for
purposes of the Exchange Offer

                                       9
<PAGE>
 
and no Exchange Notes will be issued with respect thereto unless the Notes so
withdrawn are validly retendered.  Any Notes that have been tendered but not
accepted for exchange, will be returned to the Holder thereof without cost to
such Holder as soon as practicable after withdrawal, rejection of tender or
termination of the Exchange Offer.

4.   SIGNATURE ON THIS LETTER OF TRANSMITTAL; WRITTEN INSTRUMENTS AND
     ENDORSEMENTS; GUARANTEE OF SIGNATURES.

     If this Letter of Transmittal (or facsimile hereof) is signed by the
registered Holder(s) of the Notes tendered hereby, the signature must correspond
with the name(s) as written on the face of the certificates without alteration
or enlargement or any change whatsoever.  If this Letter of Transmittal is
signed by a participant in the Book-Entry Transfer Facility, the signature must
correspond with the name as it appears on the security position listing as the
holder of the Notes.

     If any of the Notes tendered hereby are owned of record by two or more
joint owners, all such owners must sign this Letter of Transmittal.

     If a number of Notes registered in different names are tendered, it will be
necessary to complete, sign and submit as many separate copies of this Letter of
Transmittal as there are different registrations of Notes.

     Signatures on this Letter of Transmittal or a notice of withdrawal, as the
case may be, must be guaranteed by an Eligible Institution unless the Notes
tendered hereby are tendered (i) by a registered Holder who has not completed
the box entitled "Special Registration Instructions" or "Special Delivery
Instructions" on the Letter of Transmittal or (ii) for the account of an
Eligible Institution.

     If this Letter of Transmittal is signed by the registered Holder or Holders
of Notes (which term, for the purposes described herein, shall include a
participant in the Book-Entry Transfer Facility whose name appears on a security
listing as the holder of the Notes) listed and tendered hereby, no endorsements
of the tendered Notes or separate written instruments of transfer or exchange
are required.  In any other case, the registered Holder (or acting Holder) must
either properly endorse the Notes or transmit properly completed bond powers
with this Letter of Transmittal (in either case, executed exactly as the name(s)
of the registered Holder(s) appear(s) on the Notes, and, with respect to a
participant in the Book-Entry Transfer Facility whose name appears on a security
position listing as the owner of Notes, exactly as the name of the participant
appears on such security position listing), with the signature on the Notes or
bond power guaranteed by an Eligible Institution (except where the Notes are
tendered for the account of an Eligible Institution).

     If this Letter of Transmittal, any certificates or separate written
instruments of transfer or exchange 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 so to act must be submitted.

                                       10
<PAGE>
 
5.   SPECIAL REGISTRATION AND DELIVERY INSTRUCTIONS.

     Tendering Holders should indicate, in the applicable box, the name and
address (or account at the Book-Entry Transfer Facility) in which the Exchange
Notes or substitute Notes for principal amounts not tendered or not accepted for
exchange are to be issued (or deposited), if different from the names and
addresses or accounts of the person signing this Letter of Transmittal.  In the
case of issuance in a different name, the employer identification number or
social security number of the person named must also be indicated and the
tendering Holder should complete the applicable box.

     If no instructions are given, the Exchange Notes (and any Notes not
tendered or not accepted) will be issued in the name of and sent to the acting
Holder of the Notes or deposited at such Holder's account at the Book-Entry
Transfer Facility.

6.   TRANSFER TAXES.

     The Company shall pay all transfer taxes, if any, applicable to the
transfer and exchange of Notes to it or its order pursuant to the Exchange
Offer.  If a transfer tax is imposed for any other reason other than the
transfer and exchange of Notes to the Company or its order pursuant to the
Exchange Offer, the amount of any such transfer taxes (whether imposed on the
registered Holder or any other person) will be payable by the tendering Holder.
If satisfactory evidence of payment of such taxes or exception therefrom is not
submitted herewith, the amount of such transfer taxes will be billed directly to
such tendering Holder.

     Except as provided in this Instruction 6, it will not be necessary for
transfer stamps to be affixed to the Notes listed in this Letter of Transmittal.

7.   WAIVER OF CONDITIONS.

     The Company reserves the absolute right to waive, in whole or in part, any
of the conditions to the Exchange Offer set forth in the Prospectus.

8.   MUTILATED, LOST, STOLEN OR DESTROYED NOTES.

     Any holder whose Notes have been mutilated, lost, stolen or destroyed
should contact the Exchange Agent at the address indicated above for further
instructions.

9.   REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.

     Questions relating to the procedure for tendering as well as requests for
additional copies of the Prospectus and this Letter of Transmittal, may be
directed to the Exchange Agent at the address and telephone number(s) set forth
above.  In addition, all questions relating to the Exchange Offer, as well as
requests for assistance or additional copies of the Prospectus and this Letter
of Transmittal, may be directed to the Company at 1600 Smith Street, Suite 1500,
Houston, Texas  77002, Attention:  Jane Corbett (telephone: (713) 654-1414).

                                       11
<PAGE>
 
10.  VALIDITY AND FORM.

     All questions as to the validity, form, eligibility (including time of
receipt), acceptance of tendered Notes and withdrawal of tendered Notes will be
determined by the Company in its sole discretion, which determination will be
final and binding.  The Company reserves the absolute right to reject any and
all Notes not properly tendered or any Notes the Company's acceptance of which
would, in the opinion of counsel for the Company, be unlawful.  The Company also
reserves the right to waive any defects, irregularities or conditions of tender
as to particular Notes.  The Company's interpretation of the terms and
conditions of the Exchange Offer (including the instructions in this Letter of
Transmittal) will be final and binding on all parties.  Unless waived, any
defects or irregularities in connection with tenders of Notes must be cured
within such time as the Company shall determine.  Although the Company intends
to notify Holders of defects or irregularities with respect to tenders of Notes,
neither the Company, the Exchange Agent nor any other person shall incur any
liability for failure to give such notification.  Tenders of Notes will not be
deemed to have been made until such defects or irregularities have been cured or
waived.  Any Notes received by the Exchange Agent that are not properly tendered
and as to which the defects or irregularities have not been cured or waived will
be returned by the Exchange Agent to the tendering Holders as soon as
practicable following the Expiration Date.


                           IMPORTANT TAX INFORMATION

     Under federal income tax law, a Holder tendering Notes is required to
provide the Exchange Agent with such holder's correct TIN on Substitute Form W-9
below.  If such Holder is an individual, the TIN is the Holder's social security
number.  The Certificate of Awaiting Taxpayer Identification Number should be
completed if the tendering Holder has not been issued a TIN and has applied for
a number or intends to apply for a number in the near future.  If the Exchange
Agent is not provided with the correct TIN, the Holder may be subject to a $50
penalty imposed by the Internal Revenue Service.  In addition, payments that are
made to such Holder with respect to tendered Notes may be subject to backup
withholding.

     Certain Holders (including, among others, all corporations and certain
foreign individuals and foreign entities) are not subject to these backup
withholding and reporting requirements.  In order for such a Holder to qualify
as an exempt recipient, that holder must submit to the Exchange Agent a properly
completed Internal Revenue Service Form W-8, signed under penalties of perjury,
attesting to that Holder's exempt status.  Such forms can be obtained from the
Exchange Agent.

     If backup withholding applies, the Exchange Agent is required to withhold
31% of any amounts otherwise payable to the Holder.  Backup withholding is not
an additional tax.  Rather, the tax liability of persons subject to backup
withholding will be reduced by the amount of tax withheld.  If withholding
results in an overpayment of taxes, a refund may be obtained from the Internal
Revenue Service.

                                       12
<PAGE>
 
PURPOSE OF SUBSTITUTE FORM W-9

     To prevent backup withholding on payments that are made to a Holder with
respect to Notes tendered for exchange, the Holder is required to notify the
Exchange Agent of his or her correct TIN by completing the form herein
certifying that the TIN provided on Substitute Form W-9 is correct (or that such
Holder is awaiting a TIN) and that (i) such Holder has not been notified by the
Internal Revenue Service that he or she is subject to backup withholding as a
result of failure to report all interest or dividends or (ii) the Internal
Revenue Service has notified such Holder that he or she is no longer subject to
backup withholding.

WHAT NUMBER TO GIVE THE EXCHANGE AGENT

     Each Holder is required to give the Exchange Agent the social security
number or employer identification number of the record Holder(s) of the Notes.
If Notes are in more than one name or are not in the name of the actual Holder,
consult the instructions on Internal Revenue Service Form W-9, which may be
obtained from the Exchange Agent, for additional guidance on which number to
report.

CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER

     If the tendering holder has not been issued a TIN and has applied for a
number or intends to apply for a number in the near future, write "Applied For"
in the space for the TIN on Substitute Form W-9, sign and date the form and the
Certificate of Awaiting Taxpayer Identification Number and return them to the
Exchange Agent.  If such certificate is completed and the Exchange Agent is not
provided with the TIN within 60 days, the Exchange Agent will withhold 31% of
all payments made thereafter until a TIN is provided to the Exchange Agent.


     IMPORTANT:  THIS LETTER OF TRANSMITTAL OR A MANUALLY SIGNED FACSIMILE
THEREOF (TOGETHER WITH NOTES OR CONFIRMATION OF BOOK-ENTRY TRANSFER AND ALL
OTHER REQUIRED DOCUMENTS) OR A NOTICE OF GUARANTEED DELIVERY MUST BE RECEIVED BY
THE EXCHANGE AGENT ON OR PRIOR TO THE EXPIRATION DATE.

                                       13


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