SEMCO ENERGY INC
8-K, 1998-10-23
NATURAL GAS DISTRIBUTION
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<PAGE>   1

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K


                                 CURRENT REPORT
                         PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934


                        Date of Report: October 23, 1998
                        (Date of earliest event reported)

                               SEMCO Energy, Inc.
             (Exact name of registrant as specified in its charter)


   Michigan                     0-8503                        38-2144267
(State or other                 (Commission               (I.R.S. Employer
jurisdiction of                 File Number)              Identification No.)
incorporation)


405 Water Street, Port Huron, Michigan                            48060
(Address of principal executive offices)                        (Zip Code)


Registrant's telephone number, including area code             810-987-2200


<PAGE>   2



Item 7(c)  Exhibits.

         4.1      Distribution Agreement dated October 23, 1998 between SEMCO 
                  Energy, Inc. and Merrill Lynch & Co., Merrill Lynch, Pierce, 
                  Fenner & Smith Incorporated, Morgan Stanley & Co., 
                  Incorporated, A.G. Edwards & Sons, Inc. and Edward D. Jones & 
                  Co., L.P. pertaining to an offering of $150,000,000 of 
                  Medium-Term Notes due nine months or more from date of issue.

         4.2      Form of Fixed Rate Medium Term Note. 


         4.3      Form of Floating Rate Medium Term Note.
<PAGE>   3


SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.


                                                  SEMCO Energy, Inc.
                                                      (Registrant)


Dated:  October 23, 1998                          By: /s/  William L. Johnson 
                                                      -------------------------
                                                        William L. Johnson
                                                      Its: President and C.E.O.


<PAGE>   4
 

                                  EXHIBIT INDEX
                                    FORM 8-K
                                October 23, 1998


<TABLE>
<CAPTION>
                                                                                               Filed
                                                                                              -------
Exhibit                                                                                                  By
   No.                                        Description                            Herewith        Reference
   ---                                        -----------                            --------        ---------
<S>                                                                                    <C>           <C>
     4.1            Distribution Agreement dated October 23, 1998 between SEMCO 
                    Energy,  Inc. and Merrill Lynch & Co., Merrill Lynch, Pierce,          X
                    Fenner & Smith Incorporated, Morgan Stanley & Co., Incorporated,  
                    A.G. Edwards & Sons, Inc. and Edward D. Jones & Co., L.P.
                    pertaining to an offering of $150,000,000 of Medium Term Notes
                    due nine months or more from date of issue.

     4.2             Form of Fixed Rate Medium Term Note.                                   X

     4.3             Form of Floating Rate Medium Term Note.                                X
</TABLE>









<PAGE>   1
                                                                     EXHIBIT 4.1




                               SEMCO ENERGY, INC.

                                MEDIUM-TERM NOTES
                   DUE NINE MONTHS OR MORE FROM DATE OF ISSUE

                             DISTRIBUTION AGREEMENT


                                                                 October 23,1998


MERRILL LYNCH & CO.
MERRILL LYNCH, PIERCE, FENNER & SMITH
         INCORPORATED
World Financial Center
North Tower, 10th Floor
New York, New York  10281-1310

MORGAN STANLEY & CO. INCORPORATED
1585 Broadway
New York, New York 10036

A.G. EDWARDS & SONS, INC.
One North Jefferson Avenue
St. Louis, Missouri 63103

EDWARD D. JONES & Co., L.P.
12555 Manchester Road
St. Louis, Missouri 63131-3729


Dear Sirs:

                  SEMCO Energy, Inc., a Michigan corporation (the "Company"),
confirms its agreement with Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner &
Smith Incorporated, Morgan Stanley & Co. Incorporated, A.G. Edwards & Sons, Inc.
and Edward D. Jones, & Co., L.P. (each, an "Agent", and collectively, the
"Agents") with respect to the issue and sale by the Company of its Medium-Term
Notes Due Nine Months or More From Date of Issue (the "Notes"). The Notes are to
be issued pursuant to an Indenture, dated as of October 23, 1998, as amended or
modified from time to time (the "Indenture"), between the Company and NBD Bank,
a Michigan banking corporation, as trustee (the "Trustee"). As of the date
hereof, the Company has authorized the issuance and sale of up to U.S.
$150,000,000 aggregate initial offering price of Notes to or through 



<PAGE>   2



the Agents pursuant to the terms of this Agreement. It is understood, however,
that the Company may from time to time authorize the issuance of additional
Notes and that such additional Notes may be sold to or through the Agents
pursuant to the terms of this Agreement, all as though the issuance of such
Notes were authorized as of the date hereof.

                  This Agreement provides both for the sale of Notes by the
Company to one or more Agents as principal for resale to investors and other
purchasers and for the sale of Notes by the Company directly to investors (as
may from time to time be agreed to by the Company and the applicable Agent), in
which case the applicable Agent will act as an agent of the Company in
soliciting offers for the purchase of Notes.

                  The Company has filed with the Securities and Exchange
Commission (the "Commission") a registration statement on Form S-3 (No.
333-58715) for the registration of its common stock, trust preferred securities
and debt securities, including the Notes, under the Securities Act of 1933, as
amended (the "1933 Act"), and the offering thereof from time to time in
accordance with Rule 415 of the rules and regulations of the Commission under
the 1933 Act (the "1933 Act Regulations"). Such registration statement has been
declared effective by the Commission and the Indenture has been duly qualified
under the Trust Indenture Act of 1939, as amended (the "1939 Act"). Such
registration statement (as so amended, if applicable) is referred to herein as
the "Registration Statement"; and the prospectus and all applicable amendments
or supplements thereto (including the prospectus supplement and pricing
supplement relating to the offering of Notes), in the form first furnished to
the applicable Agent(s) for use in confirming sales of Notes, are collectively
referred to herein as the "Prospectus"; provided, however, that all references
to the "Registration Statement" and the "Prospectus" shall also be deemed to
include all documents incorporated therein by reference pursuant to the
Securities Exchange Act of 1934, as amended (the "1934 Act"), prior to any
acceptance by the Company of an offer for the purchase of Notes; provided,
further, that if the Company files a registration statement with the Commission
pursuant to Rule 462(b) of the 1933 Act Regulations (the "Rule 462(b)
Registration Statement"), then, after such filing, all references to the
"Registration Statement" shall also be deemed to include the Rule 462(b)
Registration Statement. A "preliminary prospectus" shall be deemed to refer to
any prospectus used before the Registration Statement became effective and any
prospectus furnished by the Company after the registration statement became
effective and before any acceptance by the Company of an offer for the purchase
of Notes which omitted information to be included upon pricing in a form of
prospectus filed with the Commission pursuant to Rule 424(b) of the 1933 Act
Regulations. For purposes of this Agreement, all references to the Registration
Statement, Prospectus or preliminary prospectus or to any amendment or
supplement thereto shall be deemed to include any copy filed with the Commission
pursuant to its Electronic Data Gathering, Analysis and Retrieval system
("EDGAR").

                  All references in this Agreement to financial statements and
schedules and other information which is "disclosed", "contained," "included" or
"stated" (or other references of like import) in the Registration Statement,
Prospectus or preliminary prospectus shall be deemed to include all such
financial statements and schedules and other information which is incorporated
by reference in the Registration Statement, Prospectus or preliminary
prospectus, as the case may be; and all references in this Agreement to
amendments or supplements to the Registration 


                                       2


<PAGE>   3


Statement, Prospectus or preliminary prospectus shall be deemed to include the
filing of any document under the 1934 Act which is incorporated by reference in
the Registration Statement, Prospectus or preliminary prospectus, as the case
may be.



SECTION 1.        Appointment as Agent.

                  (a) Appointment. Subject to the terms and conditions stated
herein and subject to the reservation by the Company of the right to sell Notes
directly on its own behalf, the Company hereby agrees that Notes will be sold
exclusively to or through the Agents. The Company agrees that it will not
appoint any other agents to act on its behalf, or to assist it, in the placement
of the Notes.

                  (b) Sale of Notes. The Company shall not sell or approve the
solicitation of offers for the purchase of Notes in excess of the amount which
shall be authorized by the Company from time to time or in excess of the
aggregate initial offering price of Notes registered pursuant to the
Registration Statement. The Agents shall have no responsibility for maintaining
records with respect to the aggregate initial offering price of Notes sold, or
for otherwise monitoring the availability of Notes for sale, under the
Registration Statement.

                  (c) Purchases as Principal. The Agents shall not have any
obligation to purchase Notes from the Company as principal. However, absent an
agreement between an Agent and the Company that such Agent shall be acting
solely as an agent for the Company, such Agent shall be deemed to be acting as
principal in connection with any offering of Notes by the Company through such
Agent. Accordingly, the Agents, individually or in a syndicate, may agree from
time to time to purchase Notes from the Company as principal for resale to
investors and other purchasers determined by such Agents. Any purchase of Notes
from the Company by an Agent as principal shall be made in accordance with
Section 3(a) hereof.

                  (d) Solicitations as Agent. If agreed upon between an Agent
and the Company, such Agent, acting solely as an agent for the Company and not
as principal, will solicit offers for the purchase of Notes. Such Agent will
communicate to the Company, orally, each offer for the purchase of Notes
solicited by it on an agency basis other than those offers rejected by such
Agent. Such Agent shall have the right, in its discretion reasonably exercised,
to reject any offer for the purchase of Notes, in whole or in part, and any such
rejection shall not be deemed a breach of its agreement contained herein. The
Company may accept or reject any offer for the purchase of Notes, in whole or in
part. Such Agent shall make reasonable efforts to assist the Company in
obtaining performance by each purchaser whose offer for the purchase of Notes
has been solicited by it on an agency basis and accepted by the Company. Such
Agent shall not have any liability to the Company in the event that any such
purchase is not consummated for any reason. If the Company shall default on its
obligation to deliver Notes to a purchaser whose offer has been solicited by
such Agent on an agency basis and accepted by the Company, the Company shall (i)
hold such Agent harmless against any loss, claim or damage arising from or as a
result of such default by the Company and (ii) pay to such Agent any commission
to which it would otherwise be entitled absent such default.



                                       3

<PAGE>   4



                  (e) Reliance. The Company and the Agents agree that any Notes
purchased from the Company by one or more Agents as principal shall be
purchased, and any Notes the placement of which an Agent arranges as an agent of
the Company shall be placed by such Agent, in reliance on the representations,
warranties, covenants and agreements of the Company contained herein and on the
terms and conditions and in the manner provided herein.


SECTION 2.        Representations and Warranties.

                  (a) The Company represents and warrants to each Agent as of
the date hereof, as of the date of each acceptance by the Company of an offer
for the purchase of Notes (whether to such Agent as principal or through such
Agent as agent), as of the date of each delivery of Notes (whether to such Agent
as principal or through such Agent as agent) (the date of each such delivery to
such Agent as principal is referred to herein as a "Settlement Date"), and as of
any time that the Registration Statement or the Prospectus shall be amended or
supplemented (each of the times referenced above is referred to herein as a
"Representation Date"), as follows:

                      (i) Due Incorporation, Good Standing and Due Qualification
         of the Company. The Company has been duly organized and is validly
         existing as a corporation in good standing under the laws of the State
         of Michigan with corporate power and authority to own, lease and
         operate its properties and to conduct its business as described in the
         Prospectus and to enter into this Agreement and consummate the
         transactions contemplated in the Prospectus; the Company is duly
         qualified as a foreign corporation to transact business and is in good
         standing in each jurisdiction in which such qualification is required,
         whether by reason of the ownership or leasing of property or the
         conduct of business, except where the failure to so qualify or be in
         good standing would not result in a material adverse change in the
         condition, financial or otherwise, or in the earnings, business affairs
         or business prospects of the Company and its subsidiaries considered as
         one enterprise (a "Material Adverse Effect"); all of the issued and
         outstanding shares of capital stock of the Company have been duly
         authorized and are validly issued, fully paid and non-assessable; and
         none of the outstanding shares of capital stock of the Company were
         issued in violation of preemptive or other similar rights of any
         securityholder of the Company.

                      (ii) Due Incorporation, Good Standing and Due
         Qualification of Significant Subsidiaries. Each of SEMCO Energy
         Services, Inc., SEMCO Energy Gas Company and SEMCO Energy Ventures,
         Inc. (each, a "Significant Subsidiary") has been duly organized and is
         validly existing as a corporation in good standing under the laws of
         the jurisdiction of its incorporation, has corporate power and
         authority to own, lease and operate its properties and conduct its
         business as described in the Prospectus and is duly qualified as a
         foreign corporation to transact business and is in good standing in
         each jurisdiction in which such qualification is required, whether by
         reason of the ownership or leasing of property or the conduct of
         business, except where the failure to so qualify or be in good standing
         would not result in a Material Adverse Effect; except as stated in the
         Prospectus, all of the issued and outstanding shares of capital stock
         of each Significant 


                                       4
 
<PAGE>   5

        

         Subsidiary has been duly authorized and is validly issued, fully paid
         and non-assessable and is owned by the Company, directly or through
         subsidiaries, free and clear of any security interest, mortgage,
         pledge, lien, encumbrance, claim or equity; and none of the outstanding
         shares of capital stock of any Significant Subsidiary was issued in
         violation of preemptive or other similar rights of any securityholder
         of such Significant Subsidiary.

                      (iii) Registration Statement and Prospectus. The Company
         meets the requirements for use of Form S-3 under the 1933 Act; the
         Registration Statement (or any Rule 462(b) Registration Statement) has
         become effective under the 1933 Act and no stop order suspending the
         effectiveness of the Registration Statement (or any Rule 462(b)
         Registration Statement) has been issued under the 1933 Act and no
         proceedings for that purpose have been instituted or are pending or, to
         the knowledge of the Company, are contemplated by the Commission, and
         any request on the part of the Commission for additional information
         has been complied with; the Indenture has been duly qualified under the
         1939 Act; at the respective times that the Registration Statement
         (including any Rule 462(b) Registration Statement) and any
         post-effective amendment thereto (including the filing of the Company's
         most recent Annual Report on Form 10-K with the Commission (the "Annual
         Report on Form 10-K")) became effective and at each Representation
         Date, the Registration Statement (including any Rule 462(b)
         Registration Statement) and any amendments thereto complied and will
         comply in all material respects with the requirements of the 1933 Act
         and the 1933 Act Regulations and the 1939 Act and the rules and
         regulations of the Commission under the 1939 Act (the "1939 Act
         Regulations") and did not and will not contain an untrue statement of a
         material fact or omit to state a material fact required to be stated
         therein or necessary to make the statements therein not misleading;
         each preliminary prospectus and prospectus filed as part of the
         Registration Statement as originally filed or as part of any amendment
         thereto, or filed pursuant to Rule 424 under the 1933 Act, complied
         when so filed in all material respects with the 1933 Act Regulations;
         each preliminary prospectus and the Prospectus delivered to the
         applicable Agent(s) for use in connection with the offering of Notes
         are identical to any electronically transmitted copies thereof filed
         with the Commission pursuant to EDGAR, except to the extent permitted
         by Regulation S-T; and at the date hereof, at the date of the
         Prospectus and each amendment or supplement thereto and at each
         Representation Date, neither the Prospectus nor any amendment or
         supplement thereto included or will include an untrue statement of a
         material fact or omitted or will omit to state a material fact
         necessary in order to make the statements therein, in the light of the
         circumstances under which they were made, not misleading; provided,
         however, that the representations and warranties in this subsection
         shall not apply to statements in or omissions from the Registration
         Statement or the Prospectus made in reliance upon and in conformity
         with information furnished to the Company in writing by the Agents
         expressly for use in the Registration Statement or the Prospectus.

                      (iv) Incorporated Documents. The documents incorporated or
         deemed to be incorporated by reference in the Prospectus, at the time
         they were or hereafter are filed with the Commission, complied and will
         comply in all material respects with the requirements of the 1934 Act
         and the rules and regulations of the Commission under the 


                                       5


<PAGE>   6


          
         1934 Act (the "1934 Act Regulations") and, when read together with the
         other information in the Prospectus, at the date hereof, at the date of
         the Prospectus and at each Representation Date, did not and will not
         include an untrue statement of a material fact or omit to state a
         material fact necessary in order to make the statements therein, in the
         light of the circumstances under which they were made, not misleading.

                      (v) Independent Accountants. The accountants who certified
         the financial statements and any supporting schedules thereto included
         in the Registration Statement and the Prospectus are independent public
         accountants as required by the 1933 Act and the 1933 Act Regulations.

                      (vi) Financial Statements. The consolidated financial
         statements of the Company included in the Registration Statement and
         the Prospectus, together with the related schedules and notes, present
         fairly the consolidated financial position of the Company and its
         consolidated subsidiaries at the dates indicated and the consolidated
         statement of operations, stockholders' equity and cash flows of the
         Company and its consolidated subsidiaries for the periods specified;
         such financial statements have been prepared in conformity with
         generally accepted accounting principles ("GAAP") applied on a
         consistent basis throughout the periods involved, other than as noted
         therein; the supporting schedules, if any, included in the Registration
         Statement and the Prospectus present fairly in accordance with GAAP the
         information required to be stated therein; the selected financial data
         and the summary financial information included in the Registration
         Statement and the Prospectus present fairly the information shown
         therein and have been compiled on a basis consistent with that of the
         audited financial statements included in the Registration Statement and
         the Prospectus, subject to year end adjustments.

                      (vii) No Material Changes. Since the respective dates as
         of which information is given in the Registration Statement and the
         Prospectus, except as otherwise stated therein, (1) there has been no
         event or occurrence that would result in a Material Adverse Effect and
         (2) there have been no transactions entered into by the Company or any
         of its subsidiaries, other than those in the ordinary course of
         business, which are material with respect to the Company and its
         subsidiaries considered as one enterprise.

                      (viii) Authorization, etc., of this Agreement, the
         Indenture and the Notes. This Agreement has been duly authorized,
         executed and delivered by the Company; the Indenture has been duly
         authorized, executed and delivered by the Company and will be a valid
         and legally binding agreement of the Company, enforceable against the
         Company in accordance with its terms, except as enforcement thereof may
         be limited by bankruptcy, insolvency, reorganization, moratorium or
         other similar laws affecting the enforcement of creditors' rights
         generally or by general equitable principles (regardless of whether
         enforcement is considered in a proceeding in equity or at law); the
         Notes have been duly authorized by the Company for offer, sale,
         issuance and delivery pursuant to this Agreement and, when issued,
         authenticated and delivered in the manner provided for in 


                                       6

<PAGE>   7


         the Indenture and delivered against payment of the consideration
         therefor, will constitute valid and legally binding obligations of the
         Company, enforceable against the Company in accordance with their
         terms, except as enforcement thereof may be limited by bankruptcy,
         insolvency, reorganization, moratorium or other similar laws affecting
         the enforcement of creditors' rights generally or by general equitable
         principles (regardless of whether enforcement is considered in a
         proceeding in equity or at law); the Notes will be substantially in a
         form previously certified to the Agents and contemplated by the
         Indenture; and each holder of Notes will be entitled to the benefits of
         the Indenture.

                      (ix) Descriptions of the Indenture and the Notes. The
         Indenture and the Notes conform and will conform in all material
         respects to the statements relating thereto contained in the Prospectus
         and are substantially in the form filed or incorporated by reference,
         as the case may be, as an exhibit to the Registration Statement.

                      (x) Accuracy of Exhibits. There are no contracts or
         documents which are required to be described in the Registration
         Statement, the Prospectus or the documents incorporated by reference
         therein or to be filed as exhibits thereto which have not been so
         described and filed as required.

                      (xi) Absence of Defaults and Conflicts. Neither the
         Company nor any of its subsidiaries is in violation of the provisions
         of its charter or by-laws or in default in the performance or
         observance of any obligation, agreement, covenant or condition
         contained in any contract, indenture, mortgage, deed of trust, loan or
         credit agreement, note, lease or other agreement or instrument to which
         the Company or any of its subsidiaries is a party or by which it or any
         of them may be bound or to which any of the property or assets of the
         Company or any of its subsidiaries is subject (collectively,
         "Agreements and Instruments"), except for such defaults that would not
         result in a Material Adverse Effect; and the execution, delivery and
         performance of this Agreement, the Indenture, the Notes and any other
         agreement or instrument entered into or issued or to be entered into or
         issued by the Company in connection with the transactions contemplated
         by the Prospectus, the consummation of the transactions contemplated in
         the Prospectus (including the issuance and sale of the Notes and the
         use of proceeds therefrom as described in the Prospectus) and the
         compliance by the Company with its obligations hereunder and under the
         Indenture, the Notes and such other agreements or instruments have been
         duly authorized by all necessary corporate action and do not and will
         not, whether with or without the giving of notice or the passage of
         time or both, conflict with or constitute a breach of, or default or
         event or condition which gives the holder of any note, debenture or
         other evidence of indebtedness (or any person acting on such holder's
         behalf) the right to require the repurchase, redemption or repayment of
         all or a portion of such indebtedness by the Company or any of its
         subsidiaries (a "Repayment Event") under, or result in the creation or
         imposition of any lien, charge or encumbrance upon any assets,
         properties or operations of the Company or any of its subsidiaries
         pursuant to, any Agreements and Instruments, nor will such action 
         result in any violation of the provisions of the charter or by-laws 
         of the Company or any 


                                       7

<PAGE>   8


         of its subsidiaries or any applicable law, statute, rule, regulation,
         judgment, order, writ or decree of any government, government
         instrumentality or court, domestic or foreign, having jurisdiction over
         the Company or any of its subsidiaries or any of their assets,
         properties or operations.

                      (xii) Absence of Labor Disputes. No labor dispute with the
         employees of the Company or any of its subsidiaries exists or, to the
         knowledge of the Company, is imminent, which may reasonably be expected
         to result in a Material Adverse Effect.

                      (xiii) Absence of Proceedings. There is no action, suit,
         proceeding, inquiry or investigation before or brought by any court or
         governmental agency or body, domestic or foreign, now pending, or to
         the knowledge of the Company threatened, against or affecting the
         Company or any of its subsidiaries which is required to be disclosed in
         the Registration Statement and the Prospectus (other than as stated
         therein), or which may reasonably be expected to result in a Material
         Adverse Effect, or which may reasonably be expected to materially and
         adversely affect the performance by the Company of its obligations
         under this Agreement, the Indenture and the Notes or the consummation
         of the transactions contemplated in the Prospectus; and the aggregate
         of all pending legal or governmental proceedings to which the Company
         or any of its subsidiaries is a party or of which any of their
         respective assets or properties or operations is the subject which are
         not described in the Registration Statement and the Prospectus,
         including ordinary routine litigation incidental to the business, may
         not reasonably be expected to result in a Material Adverse Effect.

                      (xiv) Possession of Intellectual Property. The Company and
         its subsidiaries own or possess, or can acquire on reasonable terms,
         adequate patents, patent rights, licenses, inventions, copyrights,
         know-how (including trade secrets and other unpatented and/or
         unpatentable proprietary or confidential information, systems or
         procedures), trademarks, service marks, trade names or other
         intellectual property (collectively, "Intellectual Property") necessary
         to carry on the business now operated by them, and neither the Company
         nor any of its subsidiaries has received any notice or is otherwise
         aware of any infringement of or conflict with asserted rights of others
         with respect to any Intellectual Property or of any facts or
         circumstances which would render any Intellectual Property invalid or
         inadequate to protect the interest of the Company or any of its
         subsidiaries therein, and which infringement, conflict, invalidity or
         inadequacy, singly or in the aggregate, if the subject of any
         unfavorable decision, ruling or finding, would result in a Material
         Adverse Effect.

                      (xv) Possession of Licenses and Permits. The Company and
         its subsidiaries possess such permits, licenses, approvals, consents
         and other authorizations (collectively, "Governmental Licenses") issued
         by the appropriate federal, state, local or foreign regulatory agencies
         or bodies necessary to conduct the business now operated by them,
         except where the failure to possess such a Governmental License would
         not, singly or in the aggregate, have a Material Adverse Effect; the
         Company and its subsidiaries are in compliance with the terms and
         conditions of all such Governmental Licenses, except 



                                       8

<PAGE>   9


         where the failure so to comply would not, singly or in the aggregate,
         result in a Material Adverse Effect; all of the Governmental Licenses
         are valid and in full force and effect, except where the invalidity of
         such Governmental Licenses or the failure of such Governmental Licenses
         to be in full force and effect would not result in a Material Adverse
         Effect; and neither the Company nor any of its subsidiaries has
         received any notice of proceedings relating to the revocation or
         modification of any such Governmental Licenses which, singly or in the
         aggregate, if the subject of an unfavorable decision, ruling or
         finding, would result in a Material Adverse Effect.

                      (xvi) Title to Property. The Company and its subsidiaries
         have good and marketable title to all real property owned by the
         Company and its subsidiaries and good title to all other properties
         material to the business of the Company and its subsidiaries considered
         as one enterprise, in each case, free and clear of all mortgages,
         pledges, liens, security interests, claims, restrictions or
         encumbrances of any kind, except (A) as otherwise stated in the
         Registration Statement and the Prospectus or (B) those which do not,
         singly or in the aggregate, materially affect the value of such
         property and do not interfere with the use made and proposed to be made
         of such property by the Company or any of its subsidiaries; and all of
         the leases and subleases material to the business of the Company and
         its subsidiaries considered as one enterprise, and under which the
         Company or any of its subsidiaries holds properties described in the
         Prospectus, are in full force and effect, and neither the Company nor
         any of its subsidiaries has received any notice of any material claim
         of any sort that has been asserted by anyone adverse to the rights of
         the Company or any of its subsidiaries under any of such leases or
         subleases, or affecting or questioning the rights of the Company or
         such subsidiary of the continued possession of the leased or subleased
         premises under any such lease or sublease.

                      (xvii) Environmental Laws. Except as otherwise stated in
         the Registration Statement and the Prospectus and except as would not,
         singly or in the aggregate, result in a Material Adverse Effect, (A)
         neither the Company nor any of its subsidiaries is in violation of any
         federal, state, local or foreign statute, law, rule, regulation,
         ordinance, code, policy or rule of common law or any judicial or
         administrative interpretation thereof including any judicial or
         administrative order, consent, decree or judgment, relating to
         pollution or protection of human health, the environment (including,
         without limitation, ambient air, surface water, groundwater, land
         surface or subsurface strata) or wildlife, including, without
         limitation, laws and regulations relating to the release or threatened
         release of chemicals, pollutants, contaminants, wastes, toxic
         substances, hazardous substances, petroleum or petroleum products
         (collectively, "Hazardous Materials") or to the manufacture,
         processing, distribution, use, treatment, storage, disposal, transport
         or handling of Hazardous Materials (collectively, "Environmental
         Laws"), (B) the Company and its subsidiaries have all permits,
         authorizations and approvals required under any applicable
         Environmental Laws and are each in compliance with their requirements,
         (C) there are no pending or, to the Company's knowledge, threatened
         administrative, regulatory or judicial actions, suits, demands, demand
         letters, claims, liens, notices of noncompliance or violation,
         investigation or proceedings relating to any Environmental Law against
         the 


                                       9

<PAGE>   10


         Company or any of its subsidiaries and (D) there are no events or
         circumstances that may reasonably be expected to form the basis of an
         order for clean-up or remediation, or an action, suit or proceeding by
         any private party or governmental body or agency, against or affecting
         the Company or any of its subsidiaries relating to Hazardous Materials
         or any Environmental Laws.

                      (xviii) No Filings, Regulatory Approvals, etc. No filing
         with, or approval, authorization, consent, license, registration,
         qualification, order or decree of, any court or governmental authority
         or agency, domestic or foreign, is necessary or required for the due
         authorization, execution and delivery by the Company of this Agreement,
         the Indenture and the Notes or for the performance by the Company of
         the transactions contemplated in this Agreement, the Indenture or the
         Prospectus, except such as have been previously made, obtained or
         rendered, as applicable, or as may be required under the 1933 Act or
         the 1933 Act Regulations or state securities laws.

                      (xix) Holding Company Act. The Company and the Company's
         subsidiaries are not subject to regulation under the Public Utility
         Holding Company Act of 1935, as amended (the "Holding Company Act"),
         other than the provisions of Section 9(a)(2) thereof.

                      (xx) Ratings. The Medium-Term Note Program under which the
          Notes are issued (the "Program"), as well as the Notes, are rated
          (P)Baal by Moody's Investors Service, Inc. and BBB by Standard &
          Poor's Ratings Services, or such other rating as to which the Company
          shall have most recently notified the Agents pursuant to Section 4(a)
          hereof.

                  (b) Additional Certifications. Any certificate signed by any
officer of the Company or any of its subsidiaries and delivered to one or more
Agents or to counsel for the Agents in connection with an offering of Notes to
one or more Agents as principal or through an Agent as agent shall be deemed a
representation and warranty by the Company to such Agent or Agents as to the
matters covered thereby on the date of such certificate and, unless subsequently
amended or supplemented, at each Representation Date subsequent thereto.


SECTION 3.        Purchases as Principal; Solicitations as Agent.

                  (a) Purchases as Principal. Notes purchased from the Company
by the Agents, individually or in a syndicate, as principal shall be made in
accordance with terms agreed upon between such Agent or Agents and the Company
(which terms, unless otherwise agreed, shall, to the extent applicable, include
those terms specified in Exhibit A hereto and shall be agreed upon orally, with
written confirmation prepared by such Agent or Agents and mailed to the
Company). An Agent's commitment to purchase Notes as principal shall be deemed
to have been made on the basis of the representations and warranties of the
Company herein contained and shall be subject to the terms and conditions herein
set forth. Unless the context otherwise requires, references herein to "this
Agreement" shall include the applicable agreement of one or more Agents to
purchase Notes from the Company as principal. Each purchase of Notes, unless




                                       10

<PAGE>   11


otherwise agreed, shall be at a discount from the principal amount of each such
Note equivalent to the applicable commission set forth in Schedule A hereto. The
Agents may engage the services of any broker or dealer in connection with the
resale of the Notes purchased by them as principal and may allow all or any
portion of the discount received from the Company in connection with such
purchases to such brokers or dealers. At the time of each purchase of Notes from
the Company by one or more Agents as principal, such Agent or Agents shall
specify the requirements for the officers' certificate, opinion of counsel and
comfort letter pursuant to Sections 7(b), 7(c) and 7(d) hereof.

                  If the Company and two or more Agents enter into an agreement
pursuant to which such Agents agree to purchase Notes from the Company as
principal and one or more of such Agents shall fail at the Settlement Date to
purchase the Notes which it or they are obligated to purchase (the "Defaulted
Notes"), then the nondefaulting Agents shall have the right, within 24 hours
thereafter, to make arrangements for one of them or one or more other Agents or
underwriters to purchase all, but not less than all, of the Defaulted Notes in
such amounts as may be agreed upon and upon the terms herein set forth;
provided, however, that if such arrangements shall not have been completed
within such 24-hour period, then:

                  (i) if the aggregate principal amount of Defaulted Notes does
         not exceed 10% of the aggregate principal amount of Notes to be so
         purchased by all of such Agents on the Settlement Date, the
         nondefaulting Agents shall be obligated, severally and not jointly, to
         purchase the full amount thereof in the proportions that their
         respective initial underwriting obligations bear to the underwriting
         obligations of all nondefaulting Agents; or

                  (ii) if the aggregate principal amount of Defaulted Notes
         exceeds 10% of the aggregate principal amount of Notes to be so
         purchased by all of such Agents pursuant to such agreement on the
         Settlement Date, such agreement shall terminate without liability on
         the part of any nondefaulting Agent.

No action taken pursuant to this paragraph shall relieve any defaulting Agent
from liability in respect of its default. In the event of any such default which
does not result in a termination of such agreement, either the nondefaulting
Agents or the Company shall have the right to postpone the Settlement Date for a
period not exceeding seven days in order to effect any required changes in the
Registration Statement or the Prospectus or in any other documents or
arrangements.

                  (b) Solicitations as Agent. On the basis of the
representations and warranties herein contained, but subject to the terms and
conditions herein set forth, when agreed by the Company and an Agent, such
Agent, as an agent of the Company, will use its reasonable efforts to solicit
offers for the purchase of Notes upon the terms set forth in the Prospectus. The
Agents are not authorized to appoint sub-agents with respect to Notes sold
through them as agent. All Notes sold through an Agent as agent will be sold at
100% of their principal amount unless otherwise agreed upon between the Company
and such Agent.

                  The Company reserves the right, in its sole discretion, to
suspend solicitation of offers for the purchase of Notes through an Agent, as an
agent of the Company, commencing at any 


                                       11


<PAGE>   12


time for any period of time or permanently. As soon as practicable after receipt
of instructions from the Company, such Agent will suspend solicitation of offers
for the purchase of Notes from the Company until such time as the Company has
advised such Agent that such solicitation may be resumed.

                  The Company agrees to pay each Agent a commission, in the form
of a discount, equal to the applicable percentage of the principal amount of
each Note sold by the Company as a result of a solicitation made by such Agent,
as an agent of the Company, as set forth in Schedule A hereto.

                  (c) Administrative Procedures. The purchase price, interest
rate or formula, maturity date and other terms of the Notes specified in Exhibit
A hereto (as applicable) shall be agreed upon between the Company and the
applicable Agent(s) and specified in a pricing supplement to the Prospectus
(each, a "Pricing Supplement") to be prepared by the Company in connection with
each sale of Notes. Except as otherwise specified in the applicable Pricing
Supplement, the Notes will be issued in denominations of U.S. $1,000 or any
larger amount that is an integral multiple of U.S. $1,000. Administrative
procedures with respect to the issuance and sale of the Notes (the "Procedures")
shall be agreed upon from time to time among the Company, the Agents and the
Trustee. The Agents and the Company agree to perform, and the Company agrees to
cause the Trustee to agree to perform, their respective duties and obligations
specifically provided to be performed by them in the Procedures.


SECTION 4.        Covenants of the Company.

                  The Company covenants and agrees with each Agent as follows:

                  (a) Notice of Certain Events. The Company will notify the
Agents immediately, and confirm such notice in writing, of (i) the effectiveness
of any post-effective amendment to the Registration Statement or the filing of
any amendment or supplement to the Prospectus (other than any amendment or
supplement thereto providing solely for the determination of the variable terms
of the Notes or relating solely to the offering of securities other than the
Notes), (ii) the receipt of any comments from the Commission, (iii) any request
by the Commission for any amendment to the Registration Statement or any
amendment or supplement to the Prospectus or for additional information, (iv)
the issuance by the Commission of any stop order suspending the effectiveness of
the Registration Statement, or of any order preventing or suspending the use of
any preliminary prospectus, or of the initiation of any proceedings for that
purpose or (v) any change in the rating assigned by any nationally recognized
statistical rating organization to the Program or any debt securities (including
the Notes) of the Company, or the public announcement by any nationally
recognized statistical rating organization that it has under surveillance or
review, with possible negative implications, its rating of the Program or any
such debt securities, or the withdrawal by any nationally recognized statistical
rating organization of its rating of the Program or any such debt securities.
The Company will make every reasonable effort to prevent the issuance of any
stop order and, if any stop order is issued, to obtain the lifting thereof at
the earliest possible moment.


                                       12


<PAGE>   13

                  (b) Filing or Use of Amendments. The Company will give the
Agents advance notice of its intention to file or prepare any additional
registration statement with respect to the registration of additional Notes, any
amendment to the Registration Statement (including any filing under Rule 462(b)
of the 1933 Act Regulations) or any amendment or supplement to the prospectus
included in the Registration Statement at the time it became effective or to the
Prospectus (other than an amendment or supplement thereto providing solely for
the determination of the variable terms of the Notes or relating solely to the
offering of securities other than the Notes), whether pursuant to the 1933 Act,
the 1934 Act or otherwise, will furnish to the Agents copies of any such
document a reasonable amount of time prior to such proposed filing or use, as
the case may be, and will not file any such document to which the Agents or
counsel for the Agents shall object.

                  (c) Delivery of the Registration Statement. The Company has
furnished to each Agent and to counsel for the Agents, without charge, signed
and conformed copies of the Registration Statement as originally filed and of
each amendment thereto (including exhibits filed therewith or incorporated by
reference therein and documents incorporated or deemed to be incorporated by
reference therein) and signed and conformed copies of all consents and
certificates of experts. The Registration Statement and each amendment thereto
furnished to the Agents will be identical to any electronically transmitted
copies thereof filed with the Commission pursuant to EDGAR, except to the extent
permitted by Regulation S-T.

                  (d) Delivery of the Prospectus. The Company will deliver to
each Agent, without charge, as many copies of each preliminary prospectus as
such Agent may reasonably request, and the Company hereby consents to the use of
such copies for purposes permitted by the 1933 Act. The Company will furnish to
each Agent, without charge, such number of copies of the Prospectus (as amended
or supplemented) as such Agent may reasonably request. The Prospectus and any
amendments or supplements thereto furnished to the Agents will be identical to
any electronically transmitted copies thereof filed with the Commission pursuant
to EDGAR, except to the extent permitted by Regulation S-T.

                  (e) Preparation of Pricing Supplements. The Company will
prepare, with respect to any Notes to be sold to or through one or more Agents
pursuant to this Agreement, a Pricing Supplement with respect to such Notes in a
form previously approved by the Agents. The Company will deliver such Pricing
Supplement no later than 11:00 a.m., New York City time, on the business day
following the date of the Company's acceptance of the offer for the purchase of
such Notes and will file such Pricing Supplement pursuant to Rule 424(b)(3)
under the 1933 Act not later than the close of business of the Commission on the
fifth business day after the date on which such Pricing Supplement is first
used.

                  (f) Prospectus Revisions -- Material Changes. Except as
otherwise provided in subsection (m) of this Section 4, if at any time during
the term of this Agreement any event shall occur or condition shall exist as a
result of which it is necessary, in the opinion of counsel for the Agents or
counsel for the Company, to amend the Registration Statement in order that the
Registration Statement will not contain an untrue statement of a material fact
or omit to state a material fact required to be stated therein or necessary to
make the statements therein not 



                                       13

<PAGE>   14


misleading or to amend or supplement the Prospectus in order that the Prospectus
will not include an untrue statement of a material fact or omit to state a
material fact necessary in order to make the statements therein not misleading
in the light of the circumstances existing at the time the Prospectus is
delivered to a purchaser, or if it shall be necessary, in the opinion of either
such counsel, to amend the Registration Statement or amend or supplement the
Prospectus in order to comply with the requirements of the 1933 Act or the 1933
Act Regulations, the Company shall give immediate notice, confirmed in writing,
to the Agents to cease the solicitation of offers for the purchase of Notes in
their capacity as agents and to cease sales of any Notes they may then own as
principal, and the Company will promptly prepare and file with the Commission,
subject to Section 4(b) hereof, such amendment or supplement as may be necessary
to correct such statement or omission or to make the Registration Statement and
Prospectus comply with such requirements, and the Company will furnish to the
Agents, without charge, such number of copies of such amendment or supplement as
the Agents may reasonably request. In addition, the Company will comply with the
1933 Act, the 1933 Act Regulations, the 1934 Act and the 1934 Act Regulations so
as to permit the completion of the distribution of each offering of Notes.

                  (g) Prospectus Revisions -- Periodic Financial Information.
Except as otherwise provided in subsection (m) of this Section 4, on or prior to
the date on which there shall be released to the general public interim
financial statement information related to the Company with respect to each of
the first three quarters of any fiscal year or preliminary financial statement
information with respect to any fiscal year, the Company shall furnish such
information to the Agents, confirmed in writing, and shall cause the Prospectus
to be amended or supplemented (which amendment or supplement may be effected
through filing a document incorporated by reference) to include financial
information with respect thereto and corresponding information for the
comparable period of the preceding fiscal year, as well as such other
information and explanations as shall be necessary for an understanding thereof
or as shall be required by the 1933 Act or the 1933 Act Regulations.

                  (h) Prospectus Revisions -- Audited Financial Information.
Except as otherwise provided in subsection (m) of this Section 4, on or prior to
the date on which there shall be released to the general public financial
information included in or derived from the audited consolidated financial
statements of the Company for the preceding fiscal year, the Company shall
furnish such information to the Agents, confirmed in writing, and shall cause
the Prospectus to be amended or supplemented (which amendment or supplement may
be effected through filing a document incorporated by reference) to include such
audited consolidated financial statements and the report or reports, and consent
or consents to such inclusion, of the independent accountants with respect
thereto, as well as such other information and explanations as shall be
necessary for an understanding of such consolidated financial statements or as
shall be required by the 1933 Act or the 1933 Act Regulations.

                  (i) Earnings Statements. The Company will timely file such
reports pursuant to the 1934 Act as are necessary in order to make generally
available to its securityholders as soon as practicable an earnings statement
for the purposes of, and to provide the benefits contemplated by, the last
paragraph of Section 11(a) of the 1933 Act.



                                       14


<PAGE>   15

                  (j) Reporting Requirements. The Company, during the period
when the Prospectus is required to be delivered under the 1933 Act or the 1934
Act, will file all documents required to be filed with the Commission pursuant
to the 1934 Act within the time periods prescribed by the 1934 Act and the 1934
Act Regulations.

                  (k) Restriction on Offers and Sales of Securities. Unless
otherwise agreed upon between one or more Agents acting as principal and the
Company, between the date of the agreement by such Agent(s) to purchase the
related Notes from the Company and the Settlement Date with respect thereto, the
Company will not, without the prior written consent of such Agent(s), issue,
sell, offer or contract to sell, grant any option for the sale of, or otherwise
dispose of, any debt securities of the Company (other than the Notes that are to
be sold pursuant to such agreement or commercial paper in the ordinary course of
business). This paragraph does not apply to the negotiation, execution or use of
short-term lines of credit.

                  (l) Use of Proceeds. The Company will use the net proceeds
received by it from the issuance and sale of the Notes in the manner specified
in the Prospectus.

                  (m) Suspension of Certain Obligations. The Company shall not
be required to comply with the provisions of subsections (f), (g) or (h) of this
Section 4 during any period from the time (i) the Agents shall have suspended
solicitation of offers for the purchase of Notes in their capacity as agents
pursuant to a request from the Company and (ii) no Agent shall then hold any
Notes purchased from the Company as principal, as the case may be, until the
time the Company shall determine that solicitation of offers for the purchase of
Notes should be resumed or an Agent shall subsequently purchase Notes from the
Company as principal.


SECTION 5.        Conditions of Agents' Obligations.

                  The obligations of one or more Agents to purchase Notes from
the Company as principal and to solicit offers for the purchase of Notes as an
agent of the Company, and the obligations of any purchasers of Notes sold
through an Agent as an agent of the Company, will be subject to the accuracy of
the representations and warranties on the part of the Company herein contained
or contained in any certificate of an officer of the Company or any of its
subsidiaries delivered pursuant to the provisions hereof, to the performance and
observance by the Company of its covenants and other obligations hereunder, and
to the following additional conditions precedent:

                  (a) Effectiveness of Registration Statement. The Registration
Statement (including any Rule 462(b) Registration Statement) has become
effective under the 1933 Act and no stop order suspending the effectiveness of
the Registration Statement shall have been issued under the 1933 Act and no
proceedings for that purpose shall have been instituted or shall be pending or
threatened by the Commission, and any request on the part of the Commission for
additional information shall have been complied with to the reasonable
satisfaction of counsel to the Agents.



                                       15


<PAGE>   16

                  (b) Legal Opinions. On the date hereof, the Agents shall have
received the following legal opinions, dated as of the date hereof and in form
and substance satisfactory to the Agents:

                           (1) Opinion of Counsel for the Company. The favorable
                    opinion of Dickinson Wright PLLC, special counsel for the
                    Company, and Arnold R. Madigan, General Counsel to the
                    Company, substantially to the effect in the aggregate 
                    set forth in Exhibit B hereto and to such further effect as
                    the Agents may reasonably request. In giving such opinion,
                    such counsel may assume, that the Notes, in the forms
                    certified on the date hereof, and the Indenture are governed
                    by the law of the State of Michigan, notwithstanding the
                    express choice of law provision contained therein.  Such
                    counsel may also state that, insofar as such opinion
                    involves factual matters, they have relied, to the extent
                    they deem proper, upon certificates of officers of the
                    Company and its subsidiaries and certificates of public
                    officials.

                           (2) Opinion of Counsel for the Agents. The favorable
                     opinion of Dewey Ballantine LLP, counsel for the Agents,
                     with respect to such matters as the Agents may reasonably
                     request.

                  (c) Officer's Certificate. On the date hereof, there shall not
have been, since the respective dates as of which information is given in the
Prospectus, any Material Adverse Effect and the Agents shall have received a
certificate of the President or a Vice President of the Company or of the chief
financial officer or chief accounting officer of the Company, dated as of the
date hereof, to the effect that (i) there has been no such Material Adverse
Effect, (ii) the representations and warranties of the Company herein contained
are true and correct with the same force and effect as though expressly made at
and as of the date of such certificate, (iii) the Company has complied with all
agreements and satisfied all conditions on its part to be performed or satisfied
at or prior to the date of such certificate, and (iv) no stop order suspending
the effectiveness of the Registration Statement has been issued and no
proceedings for that purpose have been instituted, are pending or, to the best
of such officer's knowledge, are threatened by the Commission.

                  (d) Comfort Letter of Arthur Andersen LLP. On the date hereof,
the Agents shall have received a letter from Arthur Andersen LLP, dated as of
the date hereof and in form and substance satisfactory to the Agents.

                  (e) Additional Documents. On the date hereof, counsel to the
Agents shall have been furnished with such documents and opinions as such
counsel may require for the purpose of enabling such counsel to pass upon the
issuance and sale of Notes as herein contemplated and related proceedings, or in
order to evidence the accuracy of any of the representations and warranties, or
the fulfillment of any of the conditions, herein contained; and all proceedings
taken by the Company in connection with the issuance and sale of Notes as herein
contemplated shall be satisfactory in form and substance to the Agents and to
counsel to the Agents.

                  If any condition specified in this Section 5 shall not have
been fulfilled when and as required to be fulfilled, this Agreement may be
terminated by the applicable Agent or Agents 



                                       16

<PAGE>   17


by notice to the Company at any time and any such termination shall be without
liability of any party to any other party except as provided in Section 10
hereof and except that Sections 8, 9, 11, 14 and 15 hereof shall survive any
such termination and remain in full force and effect.


SECTION 6.        Delivery of and Payment for Notes Sold through an Agent as 
                  Agent.

                  Delivery of Notes sold through an Agent as an agent of the
Company shall be made by the Company to such Agent for the account of any
purchaser only against payment therefor in immediately available funds. In the
event that a purchaser shall fail either to accept delivery of or to make
payment for a Note on the date fixed for settlement, such Agent shall promptly
notify the Company and deliver such Note to the Company and, if such Agent has
theretofore paid the Company for such Note, the Company will promptly return
such funds to such Agent. If such failure has occurred for any reason other than
default by such Agent in the performance of its obligations hereunder, the
Company will reimburse such Agent on an equitable basis for its loss of the use
of the funds for the period such funds were credited to the Company's account.


SECTION 7.        Additional Covenants of the Company.

                  The Company further covenants and agrees with each Agent as
follows:

                  (a) Reaffirmation of Representations and Warranties. Each
acceptance by the Company of an offer for the purchase of Notes (whether to one
or more Agents as principal or through an Agent as agent), and each delivery of
Notes (whether to one or more Agents as principal or through an Agent as agent),
shall be deemed to be an affirmation that the representations and warranties of
the Company herein contained and contained in any certificate theretofore
delivered to the Agents pursuant hereto are true and correct at the time of such
acceptance or sale, as the case may be, and an undertaking that such
representations and warranties will be true and correct at the time of delivery
to such Agent(s) or to the purchaser or its agent, as the case may be, of the
Notes relating to such acceptance or sale, as the case may be, as though made at
and as of each such time (it being understood that such representations and
warranties shall relate to the Registration Statement and Prospectus as amended
and supplemented to each such time).

                  (b) Subsequent Delivery of Certificates. Each time that (i)
the Registration Statement or the Prospectus shall be amended or supplemented
(other than by an amendment or supplement providing solely for the determination
of the variable terms of the Notes or relating solely to the offering of
securities other than the Notes), (ii) (if required in connection with the
purchase of Notes from the Company by one or more Agents as principal) the
Company sells Notes to one or more Agents as principal or (iii) the Company
sells Notes in a form not previously certified to the Agents by the Company, the
Company shall furnish or cause to be furnished to the Agent(s), forthwith a
certificate dated the date of filing with the Commission or the date of
effectiveness of such amendment or supplement, as applicable, or the date of
such sale, as the case may be, in form satisfactory to the Agent(s) to the
effect that the statements 



                                       17


<PAGE>   18

contained in the certificate referred to in Section 5(c) hereof which were last
furnished to the Agents are true and correct at the time of the filing or
effectiveness of such amendment or supplement, as applicable, or the time of
such sale, as the case may be, as though made at and as of such time (except
that such statements shall be deemed to relate to the Registration Statement and
the Prospectus as amended and supplemented to such time) or, in lieu of such
certificate, a certificate of the same tenor as the certificate referred to in
Section 5(c) hereof, modified as necessary to relate to the Registration
Statement and the Prospectus as amended and supplemented to the time of delivery
of such certificate (it being understood that, in the case of clause (ii) above,
any such certificate shall also include a certification that there has been no
Material Adverse Effect since the date of the agreement by such Agent(s) to
purchase Notes from the Company as principal).

                  (c) Subsequent Delivery of Legal Opinions. Each time that (i)
the Registration Statement or the Prospectus shall be amended or supplemented
(other than by an amendment or supplement providing solely for the determination
of the variable terms of the Notes or relating solely to the offering of
securities other than the Notes), (ii) (if required in connection with the
purchase of Notes from the Company by one or more Agents as principal) the
Company sells Notes to one or more Agents as principal or (iii) the Company
sells Notes in a form not previously certified to the Agents by the Company, the
Company shall furnish or cause to be furnished forthwith to the Agent(s) and to
counsel to the Agents the written opinion of Dickinson Wright PLLC, special
counsel to the Company and Arnold R. Madigan, General Counsel to the Company, or
other counsel satisfactory to the Agent(s), dated the date of filing with the
Commission or the date of effectiveness of such amendment or supplement, as
applicable, or the date of such sale, as the case may be, in form and substance
satisfactory to the Agent(s), of the same tenor as the opinion referred to in
Section 5(b)(1) hereof, but modified, as necessary, to relate to the
Registration Statement and the Prospectus as amended and supplemented to the
time of delivery of such opinion or, in lieu of such opinion, counsel last
furnishing such opinion to the Agents shall furnish the Agent(s) with a letter
substantially to the effect that the Agent(s) may rely on such last opinion to
the same extent as though it was dated the date of such letter authorizing
reliance (except that statements in such last opinion shall be deemed to relate
to the Registration Statement and the Prospectus as amended and supplemented to
the time of delivery of such letter authorizing reliance).

                  (d) Subsequent Delivery of Comfort Letters. Each time that (i)
the Registration Statement or the Prospectus shall be amended or supplemented to
include additional financial information (other than by an amendment or
supplement relating solely to the issuance and/or offering of securities other
than the Notes) or (ii) (if required in connection with the purchase of Notes
from the Company by one or more Agents as principal) the Company sells Notes to
one or more Agents as principal, the Company shall cause Arthur Andersen LLP
forthwith to furnish to the Agent(s) a letter, dated the date of filing with the
Commission or the date of effectiveness of such amendment or supplement, as
applicable, or the date of such sale, as the case may be, in form satisfactory
to the Agent(s), of the same tenor as the letter referred to in Section 5(d)
hereof but modified to relate to the Registration Statement and Prospectus as
amended and supplemented to the date of such letter.



                                       18

<PAGE>   19


SECTION 8.        Indemnification.

                  (a) Indemnification of the Agents. The Company agrees to
indemnify and hold harmless each Agent and each person, if any, who controls
such Agent within the meaning of Section 15 of the 1933 Act or Section 20 of the
1934 Act as follows:

                      (i) against any and all loss, liability, claim, damage and
         expense whatsoever, as incurred, arising out of an untrue statement or
         alleged untrue statement of a material fact contained in the
         Registration Statement (or any amendment thereto), or the omission or
         alleged omission therefrom of a material fact required to be stated
         therein or necessary to make the statements therein not misleading, or
         arising out of an untrue statement or alleged untrue statement of a
         material fact included in any preliminary prospectus or the Prospectus
         (or any amendment or supplement thereto), or the omission or alleged
         omission therefrom of a material fact necessary in order to make the
         statements therein, in the light of the circumstances under which they
         were made, not misleading;

                      (ii) against any and all loss, liability, claim, damage
         and expense whatsoever, as incurred, to the extent of the aggregate
         amount paid in settlement of any litigation, or any investigation or
         proceeding by any governmental agency or body, commenced or threatened,
         or any claim whatsoever based upon any such untrue statement or
         omission, or any such alleged untrue statement or omission, provided
         that (subject to Section 8(d) hereof) any such settlement is effected
         with the written consent of the Company; and

                      (iii) against any and all expense whatsoever, as incurred
         (including the reasonable fees and disbursements of counsel chosen by
         such Agent), reasonably incurred in investigating, preparing or
         defending against any litigation, or any investigation or proceeding by
         any governmental agency or body, commenced or threatened, or any claim
         whatsoever based upon any such untrue statement or omission, or any
         such alleged untrue statement or omission, to the extent that any such
         expense is not paid under subparagraph (i) or (ii) above;

provided, however, that this indemnity does not apply to any loss, liability,
claim, damage or expense to the extent arising out of an untrue statement or
omission or alleged untrue statement or omission made in reliance upon and in
conformity with written information furnished to the Company by the Agents
expressly for use in the Registration Statement (or any amendment thereto) or
any preliminary prospectus or the Prospectus (or any amendment or supplement
thereto).

                  (b) Indemnification of Company, Directors and Officers. Each
Agent severally agrees to indemnify and hold harmless the Company, its
directors, each of its officers who signed the Registration Statement and each
person, if any, who controls the Company within the meaning of Section 15 of the
1933 Act or Section 20 of the 1934 Act against any and all loss, liability,
claim, damage and expense described in the indemnity contained in Section 8(a)
hereof, as incurred, but only with respect to untrue statements or omissions, or
alleged untrue statements or omissions, made in the Registration Statement (or
any amendment thereto) or any preliminary prospectus or the Prospectus (or any
amendment or supplement thereto) in reliance upon and in 



                                       19

<PAGE>   20


conformity with written information furnished to the Company by the Agents
expressly for use in the Registration Statement (or any amendment thereto) or
such preliminary prospectus or the Prospectus (or any amendment or supplement
thereto).

                  (c) Actions Against Parties; Notification. Each indemnified
party shall give notice as promptly as reasonably practicable to each
indemnifying party of any action commenced against it in respect of which
indemnity may be sought hereunder, but failure to so notify an indemnifying
party shall not relieve such indemnifying party from any liability hereunder to
the extent it is not materially prejudiced as a result thereof and in any event
shall not relieve it from any liability which it may have otherwise than on
account of this indemnity agreement. In the case of parties indemnified pursuant
to Section 8(a) hereof, counsel to the indemnified parties shall be selected by
the applicable Agent(s) and, in the case of parties indemnified pursuant to
Section 8(b) hereof, counsel to the indemnified shall be selected by the
Company. An indemnifying party may participate at its own expense in the defense
of any such action; provided, however, that counsel to the indemnifying party
shall not (except with the consent of the indemnified party) also be counsel to
the indemnified party. In no event shall the indemnifying parties be liable for
fees and expenses of more than one counsel (in addition to any local counsel)
separate from their own counsel for all indemnified parties in connection with
any one action or separate but similar or related actions in the same
jurisdiction arising out of the same general allegations or circumstances.

                  No indemnifying party shall, without the prior written consent
of the indemnified parties, settle or compromise or consent to the entry of any
judgment with respect to any litigation, or any investigation or proceeding by
any governmental agency or body, commenced or threatened, or any claim
whatsoever in respect of which indemnification or contribution could be sought
under this Section 8 or 9 hereof (whether or not the indemnified parties are
actual or potential parties thereto), unless such settlement, compromise or
consent (i) includes an unconditional release of each indemnified party from all
liability arising out of such litigation, investigation, proceeding or claim and
(ii) does not include a statement as to or an admission of fault, culpability or
a failure to act by or on behalf of any indemnified party.

                  (d) Settlement without Consent if Failure to Reimburse. If at
any time an indemnified party shall have requested an indemnifying party to
reimburse the indemnified party for fees and expenses of counsel, such
indemnifying party agrees that it shall be liable for any settlement of the
nature contemplated by Section 8(a)(ii) effected without its written consent if
(i) such settlement is entered into more than 45 days after receipt by such
indemnifying party of the aforesaid request, (ii) such indemnifying party shall
have received notice of the terms of such settlement at least 30 days prior to
such settlement being entered into and (iii) such indemnifying party shall not
have reimbursed such indemnified party in accordance with such request prior to
the date of such settlement.


SECTION 9.        Contribution.

                  If the indemnification provided for in Section 8 hereof is for
any reason unavailable to or insufficient to hold harmless an indemnified party
in respect of any losses, 



                                       20

<PAGE>   21


liabilities, claims, damages or expenses referred to therein, then each
indemnifying party shall contribute to the aggregate amount of such losses,
liabilities, claims, damages and expenses incurred by such indemnified party, as
incurred, (i) in such proportion as is appropriate to reflect the relative
benefits received by the Company, on the one hand, and the applicable Agent(s),
on the other hand, from the offering of the Notes that were the subject of the
claim for indemnification or (ii) if the allocation provided by clause (i) is
not permitted by applicable law, in such proportion as is appropriate to reflect
not only the relative benefits referred to in clause (i) above but also the
relative fault of the Company, on the one hand, and the applicable Agent(s), on
the other hand, in connection with the statements or omissions which resulted in
such losses, liabilities, claims, damages or expenses, as well as any other
relevant equitable considerations.

                  The relative benefits received by the Company, on the one
hand, and the applicable Agent(s), on the other hand, in connection with the
offering of the Notes that were the subject of the claim for indemnification
shall be deemed to be in the same respective proportions as the total net
proceeds from the offering of such Notes (before deducting expenses) received by
the Company and the total discount or commission received by each applicable
Agent, as the case may be, bears to the aggregate initial offering price of such
Notes.

                  The relative fault of the Company, on the one hand, and the
applicable Agent(s), on the other hand, shall be determined by reference to,
among other things, whether any untrue or alleged untrue statement of a material
fact or omission or alleged omission to state a material fact relates to
information supplied by the Company or by the applicable Agent(s) and the
parties' relative intent, knowledge, access to information and opportunity to
correct or prevent such statement or omission.

                  The Company and the Agents agree that it would not be just and
equitable if contribution pursuant to this Section 9 were determined by pro rata
allocation (even if the applicable Agent(s) were treated as one entity for such
purpose) or by any other method of allocation which does not take account of the
equitable considerations referred to above in this Section 9. The aggregate
amount of losses, liabilities, claims, damages and expenses incurred by an
indemnified party and referred to above in this Section 9 shall be deemed to
include any legal or other expenses reasonably incurred by such indemnified
party in investigating, preparing or defending against any litigation, or any
investigation or proceeding by any governmental agency or body, commenced or
threatened, or any claim whatsoever based upon any applicable untrue or alleged
untrue statement or omission or alleged omission.

                  Notwithstanding the provisions of this Section 9, (i) no Agent
shall be required to contribute any amount in excess of the amount by which the
total discount or commission received by such Agent in connection with the
offering of the Notes that were the subject of the claim for indemnification
exceeds the amount of any damages which such Agent has otherwise been required
to pay by reason of any applicable untrue or alleged untrue statement or
omission or alleged omission and (ii) no person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the 1933 Act) shall be
entitled to contribution from any person who was not guilty of such fraudulent
misrepresentation. In addition, in connection with an offering of Notes
purchased from the Company by two or more Agents as principal, the respective
obligations of such Agents to 


                                       21

<PAGE>   22


contribute pursuant to this Section 9 are several, and not joint, in proportion
to the aggregate principal amount of Notes that each such Agent has agreed to
purchase from the Company.

                  For purposes of this Section 9, each person, if any, who
controls an Agent within the meaning of Section 15 of the 1933 Act or Section 20
of the 1934 Act shall have the same rights to contribution as such Agent, and
each director of the Company, each officer of the Company and each person, if
any, who controls the Company within the meaning of Section 15 of the 1933 Act
or Section 20 of the 1934 Act shall have the same rights to contribution as the
Company.


SECTION 10.       Payment of Expenses.

                  The Company will pay all expenses incident to the performance
of its obligations under this Agreement, including:

                  (a) The preparation, filing, printing and delivery of the
Registration Statement as originally filed and all amendments thereto and any
preliminary prospectus, the Prospectus and any amendments or supplements
thereto;

                  (b) The preparation, printing and delivery of this Agreement
and the Indenture;

                  (c) The preparation, issuance and delivery of the Notes,
including any fees and expenses relating to the eligibility and issuance of
Notes in book-entry form and the cost of obtaining CUSIP or other identification
numbers for the Notes;

                  (d) The fees and disbursements of the Company's accountants,
counsel and other advisors or agents (including any calculation agent or
exchange rate agent) and of the Trustee and its counsel;

                  (e) The reasonable fees and disbursements of counsel to the
Agents incurred in connection with the establishment of the Program and incurred
from time to time in connection with the transactions contemplated hereby;

                  (f) The fees charged by nationally recognized statistical
rating organizations for the rating of the Program and the Notes;

                  (g) The filing fees incident to, and the reasonable fees and
disbursements of counsel to the Agents in connection with, the review, if any,
by the National Association of Securities Dealers, Inc. (the "NASD"); and

                  (h) Any advertising and other out-of-pocket expenses of the
Agents incurred with the approval of the Company.


                                       22



<PAGE>   23


SECTION 11.       Representations, Warranties and Agreements to Survive 
                  Delivery.

                  All representations, warranties and agreements contained in
this Agreement or in certificates of officers of the Company or any of its
subsidiaries submitted pursuant hereto or thereto shall remain operative and in
full force and effect, regardless of any investigation made by or on behalf of
the Agents or any controlling person of an Agent, or by or on behalf of the
Company, and shall survive each delivery of and payment for the Notes.


SECTION 12.       Termination.

                  (a) Termination of this Agreement. This Agreement (excluding
any agreement by one or more Agents to purchase Notes from the Company as
principal) may be terminated for any reason, at any time by either the Company
or an Agent, as to itself, upon the giving of 30 days' prior written notice of
such termination to the other party hereto.

                  (b) Termination of Agreement to Purchase Notes as Principal.
The applicable Agent(s) may terminate any agreement by such Agent(s) to purchase
Notes from the Company as principal, immediately upon notice to the Company, at
any time prior to the Settlement Date relating thereto, if (i) there has been,
since the date of such agreement or since the respective dates as of which
information is given in the Prospectus, any Material Adverse Effect or (ii)
there has occurred any material adverse change in the financial markets in the
United States, or any outbreak of hostilities or escalation thereof or other
calamity or crisis or any change or development or event involving a prospective
change in national or international political, financial or economic conditions,
in each case the effect of which is such as to make it, in the judgment of such
Agent(s), impracticable to market such Notes or enforce contracts for the sale
of such Notes, or (iii) trading in any securities of the Company has been
suspended or materially limited by the Commission or a national securities
exchange, or if trading generally on the New York Stock Exchange or the American
Stock Exchange or in the Nasdaq National Market has been suspended or materially
limited, or minimum or maximum prices for trading have been fixed, or maximum
ranges for prices have been required, by either of said exchanges or by such
system or by order of the Commission, the NASD or any other governmental
authority, or (iv) a banking moratorium has been declared by either Federal or
New York authorities, or (v) the rating assigned by any nationally recognized
statistical rating organization to the Program or any debt securities (including
the Notes) of the Company as of the date of such agreement shall have been
lowered or withdrawn since that date or if any such rating organization shall
have publicly announced that it has under surveillance or review (with negative
implications) its rating of the Program or any such debt securities, or (vi)
there shall have come to the attention of such Agent(s) any facts that would
cause such Agent(s) to believe that the Prospectus, at the time it was required
to be delivered to a purchaser of such Notes, included an untrue statement of a
material fact or omitted to state a material fact necessary in order to make the
statements therein, in the light of the circumstances existing at the time of
such delivery, not misleading.

                  (c) General. In the event of any such termination, neither
party will have any liability to the other party hereto, except that (i) the
Agents shall be entitled to any commissions earned in accordance with the third
paragraph of Section 3(b) hereof, (ii) if at the time of 


                                       23

<PAGE>   24


termination (a) any Agent shall own any Notes purchased by it from the Company
as principal or (b) an offer to purchase any of the Notes has been accepted by
the Company but the time of delivery to the purchaser or his agent of such Notes
relating thereto has not occurred, the covenants set forth in Sections 4 and 7
hereof shall remain in effect until such Notes are so resold or delivered, as
the case may be, and (iii) the covenant set forth in Section 4(i) hereof, the
provisions of Section 10 hereof, the indemnity and contribution agreements set
forth in Sections 8 and 9 hereof, and the provisions of Sections 11, 14 and 15
hereof shall remain in effect.


SECTION 13.       Notices.

                  Unless otherwise provided herein, all notices required under
the terms and provisions hereof shall be in writing, either delivered by hand,
by mail or by telex, telecopier or telegram, and any such notice shall be
effective when received at the address specified below.

                  If to the Company:

                           SEMCO Energy, Inc.
                           405 Water Street
                           Port Huron, Michigan  48060
                           Attention:  Edric R. Mason, Jr.
                           Telecopy No.:  (810) 989-4098

                  If to the Agents:

                           Merrill Lynch & Co.
                           Merrill Lynch, Pierce, Fenner & Smith
                           Incorporated
                           World Financial Center
                           North Tower - 10th Floor
                           New York, New York  10281-1310
                           Attention:  MTN Product Management
                           Telecopy No.:  (212) 449-2234

                           Morgan Stanley & Co. Incorporated
                           1585 Broadway-2nd Floor
                           New York, New York 10036
                           Attention:  Manager- Continuously Offered Products
                           Telecopy No.:  (212) 761-0780
                           with a copy to:
                           Morgan Stanley & Co. Incorporated
                           1585 Broadway-34th Floor
                           New York, New York 10036
                           Attention:  Peter Cooper, Investment Information 
                                       Center
                           Telecopy No.:  (212) 761-0260


                                       24

<PAGE>   25


                           A.G. Edwards & Sons, Inc.
                           One North Jefferson Avenue
                           E Building, Eighth Floor
                           St. Louis, Missouri 63103
                           Attention: John A. Stann
                           Telecopy No.:  (314) 955-7387

                           Edward D. Jones & Co., L.P.
                           12555 Manchester Road
                           St. Louis, Missouri 63131-3729
                           Attention: James A. Krekeler
                           Telecopy No.:  (314) 515-2664

or at such other address as such party may designate from time to time by notice
duly given in accordance with the terms of this Section 13.


SECTION 14.       Parties.

                  This Agreement shall inure to the benefit of and be binding
upon the Agents and the Company and their respective successors. Nothing
expressed or mentioned in this Agreement is intended or shall be construed to
give any person, firm or corporation, other than the parties hereto and their
respective successors and the controlling persons, officers and directors
referred to in Sections 8 and 9 hereof and their heirs and legal
representatives, any legal or equitable right, remedy or claim under or in
respect of this Agreement or any provision herein contained. This Agreement and
all conditions and provisions hereof are intended to be for the sole and
exclusive benefit of the parties hereto and their respective successors, and
said controlling persons, officers and directors and their heirs and legal
representatives, and for the benefit of no other person, firm or corporation. No
purchaser of Notes shall be deemed to be a successor by reason merely of such
purchase.


SECTION 15.       GOVERNING LAW; FORUM.

                  THIS AGREEMENT AND ALL THE RIGHTS AND OBLIGATIONS OF THE
PARTIES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE
STATE OF NEW YORK WITHOUT REGARD TO CONFLICT OF LAW PRINCIPLES. ANY SUIT, ACTION
OR PROCEEDING BROUGHT BY THE COMPANY AGAINST ANY AGENT IN CONNECTION WITH OR
ARISING UNDER THIS AGREEMENT SHALL BE BROUGHT SOLELY IN THE STATE OR FEDERAL
COURT OF APPROPRIATE JURISDICTION LOCATED IN THE BOROUGH OF MANHATTAN, THE CITY
OF NEW YORK.



                                       25

<PAGE>   26


SECTION 16.       Effect of Headings.

                  The Article and Section headings herein are for convenience
only and shall not affect the construction hereof.


SECTION 17.       Counterparts.

                  This Agreement may be executed in one or more counterparts
and, if executed in more than one counterpart, the executed counterparts hereof
shall constitute a single instrument.



                                       26

<PAGE>   27



                  If the foregoing is in accordance with the Agents'
understanding of our agreement, please sign and return to the Company a
counterpart hereof, whereupon this Distribution Agreement, along with all
counterparts, will become a binding agreement among the Agents and the Company
in accordance with its terms.

                                           Very truly yours,

                                           SEMCO Energy, Inc.


                                           By: /s/ William L. Johnson       
                                               ----------------------------
                                               Name:  William L. Johnson
                                               Title: President and Chief
                                                      Executive Officer


CONFIRMED AND ACCEPTED, 
as of the date first above written:

MERRILL LYNCH & CO.
MERRILL LYNCH, PIERCE, FENNER & SMITH
  INCORPORATED


BY: /s/ Scott G. Primrose   
    ------------------------------
   Title: Authorized Signatory

A.G. EDWARDS & SONS, INC.


BY: /s/ Karen C. Middleton      
    ------------------------------
   Title: Associate Vice President

MORGAN STANLEY & CO. INCORPORATED


BY: /s/ Mike Fusco        
    ------------------------------
   Title: Vice President


EDWARD D. JONES & Co., L.P.


BY:/s/ James A. Krekeler 
   -------------------------------
   Title: Principal




                                       27

<PAGE>   28




                                   



                                   SCHEDULE A

                  As compensation for the services of the Agents hereunder, the
Company shall pay the applicable Agent, on a discount basis, a commission for
the sale of each Note equal to the principal amount of such Note multiplied by
the appropriate percentage set forth below:


<TABLE>
<CAPTION>


MATURITY RANGES                                                                               PERCENT OF
- ---------------                                                                            PRINCIPAL AMOUNT
                                                                                           ----------------
<S>                                                                                              <C>
From 9 months to less than 1 year.............................................                   .125%

From 1 year to less than 18 months............................................                   .150

From 18 months to less than 2 years...........................................                   .200

From 2 years to less than 3 years.............................................                   .250

From 3 years to less than 4 years.............................................                   .350

From 4 years to less than 5 years.............................................                   .450

From 5 years to less than 6 years.............................................                   .500

From 6 years to less than 7 years.............................................                   .550

From 7 years to less than 10 years............................................                   .600

From 10 years to less than 15 years...........................................                   .625

From 15 years to less than 20 years...........................................                   .700

From 20 years to 30 years.....................................................                   .750

Greater than 30 years.........................................................                  *
</TABLE>








*   to be negotiated



                                    Sch.A-1


<PAGE>   29




                                       

                                      

                                                                       EXHIBIT A

                                  PRICING TERMS


Principal Amount: $_______

Interest Rate or Formula:
         If Fixed Rate Note,
              Interest Rate:
              Interest Payment Dates:
         If Floating Rate Note,
              Interest Rate Basis(es):
         If LIBOR,
              / / LIBOR Reuters Page:
              / / LIBOR Telerate Page:
         If CMT Rate,
              Designated CMT Telerate Page:
         If Telerate Page 7052:
              / / Weekly Average
              / / Monthly Average
              Designated CMT Maturity Index:
         Index Maturity:
         Spread and/or Spread Multiplier, if any:
         Initial Interest Rate, if any:
         Initial Interest Reset Date:
         Interest Reset Dates:
         Interest Payment Dates:
         Maximum Interest Rate, if any:
         Minimum Interest Rate, if any:
         Fixed Rate Commencement Date, if any:
         Fixed Interest Rate, if any:
         Day Count Convention:
         Calculation Agent:

Redemption Provisions:
         Initial Redemption Date:
         Initial Redemption Percentage:
         Annual Redemption Percentage Reduction, if any:
Repayment Provisions:
         Optional Repayment Date(s):

Original Issue Date:
Stated Maturity Date:
Authorized Denomination:



                                      A-1


<PAGE>   30


Purchase Price:  ___%, plus accrued interest, if any, from ___________
         Price to Public:  ___%, plus accrued interest, if any, from __________
         Issue Price:
         Settlement Date and Time:
         Additional/Other Terms:

Also, in connection with the purchase of Notes from the Company by one or more
Agents as principal, agreement as to whether the following will be required:

         Officers' Certificate pursuant to Section 7(b) of the Distribution
         Agreement. Legal Opinion pursuant to Section 7(c) of the Distribution
         Agreement. Comfort Letter pursuant to Section 7(d) of the Distribution
         Agreement.




                                      A-2

<PAGE>   31




                                       




                                                                       EXHIBIT B


                      FORM OF OPINION OF COMPANY'S COUNSEL
                   TO BE DELIVERED PURSUANT TO SECTION 5(b)(1)



         (1) The Company has been duly incorporated and is validly existing as a
corporation in good standing under the laws of the State of Michigan.

         (2) The Company has corporate power and authority to own, lease and
operate its properties and to conduct its business as described in the
Prospectus and to enter into the Distribution Agreement and consummate the
transactions contemplated in the Prospectus.

         (3) The Company is duly qualified as a foreign corporation to transact
business and is in good standing in each jurisdiction in which such
qualification is required, whether by reason of the ownership or leasing of
property or the conduct of business, except where the failure to so qualify or
be in good standing would not result in a Material Adverse Effect.

         (4) All of the issued and outstanding shares of capital stock of the
Company have been duly authorized and are validly issued, fully paid and
non-assessable; and none of the outstanding shares of capital stock of the
Company were issued in violation of preemptive or other similar rights of any
securityholder of the Company.

         (5) Each Significant Subsidiary has been duly incorporated and is
validly existing as a corporation in good standing under the laws of the
jurisdiction of its incorporation, has corporate power and authority to own,
lease and operate its properties and to conduct its business as described in the
Prospectus and is duly qualified as a foreign corporation to transact business
and is in good standing in each jurisdiction in which such qualification is
required, whether by reason of the ownership or leasing of property or the
conduct of business, except where the failure to so qualify or be in good
standing would not result in a Material Adverse Effect; except as stated in the
Prospectus, all of the issued and outstanding shares of capital stock of each
Significant Subsidiary has been duly authorized and are validly issued, fully
paid and non-assessable and, to the best of my knowledge, are owned by the
Company, directly or through subsidiaries, free and clear of any security
interest, mortgage, pledge, lien, encumbrance, claim or equity; and none of the
outstanding shares of capital stock of any Significant Subsidiary were issued in
violation of preemptive or other similar rights of any securityholder of such
Significant Subsidiary.

         (6) The Distribution Agreement has been duly authorized, executed and
delivered by the Company.

         (7) The Indenture has been duly authorized, executed and delivered by
the Company and (assuming due authorization, execution and delivery thereof by
the applicable Trustee) constitutes a valid and legally binding agreement of the
Company, enforceable against the Company in accordance with its terms, except as
the enforcement thereof may be limited by 



                                      B-1

<PAGE>   32


bankruptcy, insolvency, reorganization, moratorium or other similar laws
affecting the enforcement of creditors' rights generally or by general equitable
principles (regardless of whether enforcement is considered in a proceeding in
equity or at law).

         (8) The Notes have been duly authorized by the Company for offer, sale,
issuance and delivery pursuant to the Distribution Agreement and, when issued,
authenticated and delivered in the manner provided for in the Indenture and
delivered against payment of the consideration therefor, will constitute valid
and legally binding obligations of the Company, enforceable against the Company
in accordance with their terms, except as the enforcement thereof may be limited
by bankruptcy, insolvency, reorganization, moratorium or other similar laws
affecting the enforcement of creditors' rights generally or by general equitable
principles (regardless of whether enforcement is considered in a proceeding in
equity or at law); and the Notes, in the forms certified on the date hereof, are
in the form contemplated by, and each registered holder thereof is entitled to
the benefits of, the Indenture.

         (9) The Indenture and the Notes, in the forms certified on the date
hereof, conform in all material respects to the statements relating thereto
contained in the Prospectus and are in substantially the form filed or
incorporated by reference, as the case may be, as an exhibit to the Registration
Statement.

         (10) The information in the Prospectus under "Description of Notes" and
"Certain Federal Income Tax Considerations", and the information in the
Registration Statement under Item 15, to the extent that such information
constitutes matters of law, summaries of legal matters, the Company's charter
and bylaws or legal proceedings, or legal conclusions, has been reviewed by us
and is correct in all material respects.

         (11) To the best of our knowledge, neither the Company nor any of its
subsidiaries is in violation of its charter or by-laws and no default by the
Company or any of its subsidiaries exists in the due performance or observance
of any material obligation, agreement, covenant or condition contained in any
Agreement and Instrument that is described or referred to in the Registration
Statement or the Prospectus or filed or incorporated by reference as an exhibit
to the Registration Statement.

         (12) The execution, delivery and performance of the Distribution
Agreement, the Indenture and the Notes and any other agreement or instrument
entered into or issued or to be entered into or issued by the Company in
connection with the transactions contemplated in the Prospectus, the
consummation of the transactions contemplated in the Prospectus (including the
issuance and sale of the Notes and the use of the proceeds therefrom as
described in the Prospectus) and the compliance by the Company with its
obligations thereunder have been duly authorized by all necessary corporate
action and do not and will not, whether with or without the giving of notice or
passage of time or both, conflict with or constitute a breach of, or default or
Repayment Event under, or result in the creation or imposition of any lien,
charge or encumbrance upon any assets, properties or operations of the Company
or any of its subsidiaries pursuant to, any Agreement and Instrument known to
us (except for such conflicts, breaches or defaults or liens, charges or 
encumbrances that would not have a Material Adverse Effect), nor will such 
action result in any violation of the provisions of the charter or by-laws of 
the Company or any of its subsidiaries or 



                                      B-2

<PAGE>   33


any applicable law, statute, rule, regulation, judgment, order, writ or decree,
known to us, of any government, government instrumentality or court, domestic or
foreign, having jurisdiction over the Company or any of its subsidiaries or any
of their assets, properties or operations.

         (13) To the best of our knowledge, there is not pending or threatened
any action, suit, proceeding, inquiry or investigation to which the Company or
any of its subsidiaries thereof is a party or to which the assets, properties or
operations of the Company or any of its subsidiaries thereof is subject, before
or brought by any court or governmental agency or body, domestic or foreign,
which might reasonably be expected to result in a Material Adverse Effect or
which might reasonably be expected to materially and adversely affect the
assets, properties or operations of the Company or any of its subsidiaries, the
performance by the Company of its obligations under the Distribution Agreement,
the Indenture or the Notes or the consummation of the transactions contemplated
in the Prospectus.

         (14) All descriptions in the Prospectus of contracts and other
documents to which the Company or any of its subsidiaries are a party are
accurate in all material respects; and, to the best of our knowledge, there are
no franchises, contracts, indentures, mortgages, loan agreements, notes, leases
or other instruments required to be described or referred to in the Registration
Statement or to be filed as exhibits to the Registration Statement other than
those described or referred to therein or filed or incorporated by reference as
exhibits thereto, and the descriptions thereof or references thereto are correct
in all material respects.

         (15) The Registration Statement has been declared effective under the
1933 Act; any required filing of the Prospectus pursuant to Rule 424(b) has been
made in the manner and within the time period required by Rule 424(b); and to
the best of our knowledge, no stop order suspending the effectiveness of the
Registration Statement has been issued under the 1933 Act and no proceedings for
that purpose have been initiated or are pending or threatened by the Commission.

         (16) The Registration Statement and the Prospectus, excluding the
documents incorporated by reference therein, and each amendment or supplement to
the Registration Statement and Prospectus, excluding the documents incorporated
by reference therein, as of their respective effective or issue dates (other
than the financial statements and supporting schedules included therein or
omitted therefrom and the Trustee's Statement of Eligibility on Form T-1 (the
"Form T-1"), as to which we express no opinion), complied as to form in all
material respects with the requirements of the 1933 Act and the 1933 Act
Regulations.

         (17) The documents incorporated by reference in the Prospectus (other
than the financial statements and supporting schedules included therein or
omitted therefrom, as to which we express no opinion), when they were filed with
the Commission, complied as to form in all material respects with the
requirements of the 1934 Act and the 1934 Act Regulations.

         (18) The Indenture has been duly qualified under the 1939 Act.



                                      B-3

<PAGE>   34


         (19) The Company and the Company's subsidiaries are not subject to
regulation under the Public Utility Holding Company Act of 1935, as amended,
other than the provisions of Section 9 (a)(2) thereof.

         (20) No filing with, or approval, authorization, consent, license,
registration, qualification, order or decree of, any court or governmental
authority or agency, domestic or foreign, is necessary or required for the due
authorization, execution and delivery by the Company of the Distribution
Agreement, the Indenture and the Notes or for the performance by the Company of
the transactions contemplated in the Distribution Agreement, the Indenture or
the Prospectus, except such as have been previously made, obtained or rendered,
as applicable.

                  Nothing has come to our attention that would lead us to
believe that the Registration Statement or any amendment thereto, (except for
financial statements and schedules and other financial data included or
incorporated by reference therein or omitted therefrom and for the Form T-1, as
to which we need make no comment), at the time such Registration Statement or
any such amendment became effective, contained an untrue statement of a material
fact or omitted to state a material fact required to be stated therein or
necessary to make the statements therein not misleading or that the Prospectus
or any amendment or supplement thereto (except for financial statements and
schedules and other financial data included or incorporated by reference therein
or omitted therefrom, as to which we need make no comment), at the time the
Prospectus was issued, at the time any such amended or supplemented prospectus
was issued or at the date hereof, included or includes an untrue statement of a
material fact or omitted or omits to state a material fact necessary in order to
make the statements therein, in the light of the circumstances under which they
were made, not misleading. With respect to the materiality of the description of
the consideration paid for Maverick Pipeline Services, Inc., we have relied to a
large extent upon the statements and representations of officers and
representatives of the Company.

                  In rendering such opinion, such counsel may rely as to matters
of fact (but not as to legal conclusions), to the extent they deem proper, on
certificates of responsible officers of the Company and public officials. Such
opinion shall not state that it is to be governed or qualified by, or that it is
otherwise subject to, any treatise, written policy or other document relating to
legal opinions, including, without limitation, the Legal Opinion Accord of the
ABA Section of Business Law (1991).



                                      B-4


<PAGE>   1
                                                                     EXHIBIT 4.2


                                                                       CUSIP NO.


                               SEMCO ENERGY, INC.

                            SERIES _____% SENIOR NOTE
                              DUE __________, _____


Principal Amount:        $_______________

Regular Record Date:        _________________                                

Original Issue Date:     ___________, _____

Stated Maturity:         ___________, _____

Interest Payment Dates:  _______________
                           
Interest Rate:              _______% per annum

Authorized Denomination: $___________ or any integral multiples thereof

         SEMCO Energy, Inc., a Michigan corporation (the "Corporation", which
term includes any successor corporation under the Indenture referred to on the
reverse hereto, for value received, hereby promises to pay to _____________ or
its registered assigns, the principal sum of _______________________ DOLLARS 
($__________) on the Stated Maturity shown above and to pay interest thereon 
from the Original Issue Date shown above, or from the most recent Interest 
Payment Date to which interest has been paid or duly provided for, in arrears 
on each Interest Payment Date as specified above, commencing on the Interest 
Payment Date next succeeding the Original Issue Date shown above and on the 
Stated Maturity at the rate per annum shown above (the "Interest Rate") until 
the principal hereof is paid or made available for payment and on any overdue 
principal and on any overdue installment of interest. The interest so 
payable, and punctually paid or duly provided for, on any Interest Payment 
Date (other than an Interest Payment Date that is the Stated Maturity) 
will, as provided in such Indenture, be paid to the Person in whose name 
this Series _____% Senior Note (this "Security") is registered at the close
of business on the Regular Record Date as specified above next preceding such
Interest Payment Date; provided that any interest payable at Stated Maturity
will be paid to the Person to whom principal is payable. Except as otherwise
provided in the Indenture, any such interest not so punctually paid or duly
provided for will forthwith cease to be payable to the Holder on such Regular
Record Date and may either be paid to the Person in whose name this Security is
registered at the close of business on a Special Record Date for the payment of
such Defaulted Interest to be fixed by the Trustee, notice whereof shall be
<PAGE>   2


mailed to Holders of Securities of this series not less than 10 days prior to
such Special Record Date, or be paid at any time in any other lawful manner not
inconsistent with the requirements of any securities exchange, if any, on which
the Securities of this series shall be listed, and upon such notice as may be
required by any such exchange, all as more fully provided in said Indenture.

         Payments of interest on this Security will include interest accrued to
but excluding the respective Interest Payment Dates. Interest payments for this
Security shall be computed and paid on the basis of a 360-day year of twelve
30-day months. In the event that any date on which interest is payable on this
Security is not a Business Day, then payment of the interest payable on such
date will be made on the next succeeding day that is a Business Day (and without
any interest or payment in respect of any such delay) with the same force and
effect as if made on the date the payment was originally payable. "Business Day"
means a day other than (i) a Saturday or a Sunday, or (ii) a day on which banks
in New York, New York are authorized or obligated by law or executive order to
remain closed.

         Payment of the principal of and interest due at the Stated Maturity of
this Security shall be made upon surrender of this Security, at the Corporate
Trust Office, in such coin or currency of the United States of America as at the
time of payment is legal tender for payment of public and private debts. Payment
of interest (including interest on an Interest Payment Date) will be made,
subject to such surrender where applicable, at the option of the Corporation,
(i) by check mailed to the address of the Person entitled thereto as such
address shall appear in the Security Register or (ii) by wire transfer to an
account maintained by the Person entitled thereto located inside the United
States.

         REFERENCE IS HEREBY MADE TO THE FURTHER PROVISIONS OF THIS SECURITY SET
FORTH ON THE REVERSE HEREOF, WHICH FURTHER PROVISIONS SHALL FOR ALL PURPOSES
HAVE THE SAME EFFECT AS IF SET FORTH AT THIS PLACE.

         Unless the certificate of authentication hereon has been executed by
the Trustee by manual signature, this Security shall not be entitled to any
benefit under the Indenture or be valid or obligatory for any purpose.


<PAGE>   3


         IN WITNESS WHEREOF, the Corporation has caused this instrument to be
duly executed under its corporate seal.

Dated: _____________, ______


                                                     SEMCO ENERGY, INC.


                                                     By: ______________________
                                                         Its: _________________
Attest:


________________________________


                          CERTIFICATE OF AUTHENTICATION

      This is one of the Securities of the series designated therein referred to
in the within-mentioned Indenture.

                                                     NBD BANK, as Trustee


                                                     By: ______________________
                                                         Its: _________________


<PAGE>   4

                           (Reverse Side of Security)


         This Security is one of a duly authorized issue of Securities of the
Corporation (the "Securities"), issued and issuable in one or more series under
an Indenture, dated as of October, 1998, as supplemented (the "Indenture"),
between the Corporation and NBD Bank, as Trustee (the "Trustee", which term
includes any successor trustee under the Indenture), to which Indenture and all
indentures supplemental thereto reference is hereby made for a statement of the
respective rights, limitation of rights, duties and immunities thereunder of the
Corporation, the Trustee and the Holders of the Securities issued thereunder and
of the terms upon which said Securities are, and are to be, authenticated and
delivered. This Security is one of the series designated on the face hereof as
Series _____% Senior Notes due __________, ____ (the "Series Notes") in the
aggregate principal amount of up to $____________. Capitalized terms used herein
for which no definition is provided herein shall have the meanings set forth in
the Indenture.

         [THE SECURITIES OF THIS SERIES ARE NOT SUBJECT TO REDEMPTION PRIOR TO 
THEIR STATED MATURITY.]

         If an Event of Default with respect to the Securities of this series
shall occur and be continuing, the principal of the Securities of this series
may be declared due and payable in the manner, with the effect and subject to
the conditions provided in the Indenture.

         The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Corporation and the rights of the Holders of the Securities of all series
affected under the Indenture at any time by the Corporation and the Trustee with
the consent of the Holders of not less than a majority in principal amount of
the Outstanding Securities of all series affected thereby (voting as one class).
The Indenture contains provisions permitting the Holders of not less than a
majority in principal amount of the Outstanding Securities of all series with
respect to which a default under the Indenture shall have occurred and be
continuing (voting as one class), on behalf of the Holders of the Securities of
all such series, to waive, with certain exceptions, such default under the
Indenture and its consequences. The Indenture also permits the Holders of not
less than a majority in principal amount of the Securities of each series at the
time Outstanding, on behalf of the Holders of all Securities of such series, to
waive compliance by the Corporation with certain provisions of the Indenture
affecting such series. Any such consent or waiver by the Holder of this Security
shall be conclusive and binding upon such Holder and upon all future Holders of
this Security and of any Security issued upon the registration of transfer
hereof or in exchange hereof or in lieu hereof, whether or not notation of such
consent or waiver is made upon this Security.

         No reference herein to the Indenture and no provision of this Security
or of the Indenture shall alter or impair the obligation of the Corporation,
which is absolute and

<PAGE>   5

unconditional, to pay the principal of and interest on this Security at the 
times, place and rate, and in the coin or currency, herein prescribed.

         As provided in the Indenture and subject to certain limitations therein
set forth, the transfer of this Security is registrable in the Security
Register, upon surrender of this Security for registration of transfer at the
office or agency of the Corporation for such purpose, duly endorsed by, or
accompanied by a written instrument of transfer in form satisfactory to the
Corporation and the Security Registrar and duly executed by, the Holder hereof
or his attorney duly authorized in writing, and thereupon one or more new
Securities of this series, of authorized denominations and of like tenor and for
the same aggregate principal amount, will be issued to the designated transferee
or transferees. No service charge shall be made for any such registration of
transfer or exchange, but the Corporation may require payment of a sum
sufficient to cover any tax or other governmental charge payable in connection
therewith.

         As provided in and subject to the provisions of the Indenture, the
Holder of this Security shall not have the right to institute any proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder, unless such Holder shall have previously given
the Trustee written notice of a continuing Event of Default with respect to the
Securities of this series, the Holders of not less than 25% in principal amount
of the Securities of this series at the time Outstanding shall have made written
request to the Trustee to institute proceedings in respect of such Event of
Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee
shall not have received from the Holders of a majority in principal amount of
Securities of this series at the time Outstanding a direction inconsistent with
such request and shall have failed to institute any such proceeding for 60 days
after receipt of such notice, request and offer of indemnity. The foregoing
shall not apply to any suit instituted by the Holder of this Security for the
enforcement of any payment of principal hereof or any interest hereon and any
Additional Amounts on or after the respective due dates expressed herein.

         The Indenture contains provisions for defeasance at any time of all or
a portion of the indebtedness of the Securities of this series and for covenant
defeasance at any time of certain covenants in the Indenture upon compliance
with certain conditions set forth in the Indenture.

         Prior to due presentment of this Security for registration of transfer,
the Corporation, the Trustee and any agent of the Corporation or the Trustee may
treat the Person in whose name this Security is registered as the owner hereof
for all purposes, whether or not this Security be overdue, and neither the
Corporation, the Trustee nor any such agent shall be affected by notice to the
contrary.

         The Securities of this series are issuable only in registered form
without coupons in denominations of $__________ and any integral multiple
thereof. As provided in the Indenture and subject to the limitations therein set
forth, Securities of this series are exchangeable for a like aggregate principal
amount of Securities of this series of any 


<PAGE>   6

authorized denomination, as requested by the Holder surrendering the same upon 
surrender of the Security or Securities to be exchanged at the office or agency 
of the Corporation.

         This Security shall be governed by, and construed in accordance with,
the internal laws of the State of New York.


<PAGE>   7


                                  ABBREVIATIONS

The following abbreviations, when used in the inscription on the face of this
instrument, shall be construed as though they were written out in full according
to applicable laws or regulations:

TEN COM - as tenants in common

TEN ENT - as tenants by the entireties

JT TEN -  as joint tenants with rights
             of survivorship and not as
             tenants in common

UNIF GIFT MIN ACT - ..................... Custodian............................
                           (Cust)                         (Minor)

Under Uniform Gifts to Minors Act..............................................
                                           (State)

Additional abbreviations may also be used though not on the above list.

_______________________________________________________________________________

         FOR VALUE RECEIVED, the undersigned hereby sell(s) and transfers) unto
_______ (please insert Social Security or other identifying number of assignee).


_______________________________________________________________________________
PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP CODE OF 
ASSIGNEE

_______________________________________________________________________________

_______________________________________________________________________________
the within Security and all rights thereunder, hereby irrevocably constituting
and appointing agent to transfer said Security on the books of the Corporation,
with full power of substitution in the premises.

Dated: ____________________   _________________________________________________

                  NOTICE: The signature to this assignment must correspond with
                  the name as written upon the face of the within instrument in
                  every particular without alteration or enlargement, or any
                  change whatever.



<PAGE>   1
                                                                     EXHIBIT 4.3

                                 [FACE OF NOTE]



UNLESS THIS NOTE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY
TRUST COMPANY (THE "DEPOSITARY") (55 WATER STREET, NEW YORK, NEW YORK) TO THE
ISSUER HEREOF OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
AND ANY NOTE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME
AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITARY AND ANY PAYMENT
IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.(1)


- ----------------
(1) This paragraph applies to global Notes only.
<PAGE>   2
UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN CERTIFICATED
FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A
NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR
ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A
SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.(2)


REGISTERED                   CUSIP No.:                       PRINCIPAL AMOUNT:
No. FLR-__              ________       ____________                            

                               SEMCO Energy, Inc.
                                MEDIUM-TERM NOTE
                                 (Floating Rate)

INTEREST RATE BASIS          ORIGINAL ISSUE DATE:      STATED MATURITY DATE:
OR BASES:

   IF LIBOR:                          IF CMT RATE:
      [ ] LIBOR Reuters     Designated CMT Telerate Page:
      [ ] LIBOR Telerate    Designated CMT Maturity Index:

   INDEX CURRENCY:


INDEX MATURITY:            INITIAL INTEREST RATE: %   INTEREST PAYMENT DATE(S):

SPREAD (PLUS OR MINUS):    SPREAD MULTIPLIER:         INITIAL INTEREST RESET 
                                                      DATE:

MINIMUM INTEREST RATE: %   MAXIMUM INTEREST RATE: %   INTEREST RESET DATE(S):


- --------------------
(2) This paragraph applies to global Notes only.

                                       2
<PAGE>   3
INITIAL REDEMPTION   INITIAL REDEMPTION                  ANNUAL REDEMPTION
DATE:         PERCENTAGE:    %                           PERCENTAGE REDUCTION: %


OPTIONAL REPAYMENT        CALCULATION AGENT:
DATE(S):

INTEREST CATEGORY:                             DAY COUNT CONVENTION:
[ ] Regular Floating Rate Note                 [ ] 30/360 for the period
[ ] Floating Rate/Fixed Rate Note                      from        to     .
          Fixed Rate Commencement Date:        [ ] Actual/360 for the period
          Fixed Interest Rate: %                    from         to     .
[ ] Inverse Floating Rate Note                 [ ] Actual/Actual for the period
          Fixed Interest Rate: %                    from         to     .
[ ] Original Issue Discount Note               Applicable Interest Rate Basis:
       Issue Price:    %


SPECIFIED CURRENCY:                            AUTHORIZED DENOMINATION:
[ ] United States dollars                      [ ] $1,000 and integral multiples
                                               thereof
                                               [ ] Other:


DEFAULT RATE:  %


ADDENDUM ATTACHED
[ ] Yes
[ ] No


OTHER/ADDITIONAL PROVISIONS:

                                       3
<PAGE>   4
         SEMCO Energy, Inc., a Michigan corporation (the "Company", which terms
include any successor corporation under the Indenture hereinafter referred to),
for value received, hereby promises to pay to _________ , or registered assigns,
the principal sum of _____________ , on the Stated Maturity Date specified above
(or any Redemption Date or Repayment Date, each as defined on the reverse
hereof) (each such Stated Maturity Date, Redemption Date or Repayment Date being
hereinafter referred to as the "Maturity Date" with respect to the principal
repayable on such date) and to pay interest thereon, at a rate per annum equal
to the Initial Interest Rate specified above until the Initial Interest Reset
Date specified above and thereafter at a rate determined in accordance with the
provisions specified above and on the reverse hereof with respect to one or more
Interest Rate Bases specified above until the principal hereof is paid or duly
made available for payment, and (to the extent that the payment of such interest
shall be legally enforceable) at the Default Rate per annum specified above on
any overdue principal, premium and/or interest. The Company will pay interest in
arrears on each Interest Payment Date, if any, specified above (each, an
"Interest Payment Date"), commencing with the first Interest Payment Date next
succeeding the Original Issue Date specified above, and on the Maturity Date;
provided, however, that if the Original Issue Date occurs between a Record Date
(as defined below) and the next succeeding Interest Payment Date, interest
payments will commence on the second Interest Payment Date next succeeding the
Original Issue Date to the holder of this Note on the Record Date with respect
to such second Interest Payment Date.

         Interest on this Note will accrue from, and including, the immediately
preceding Interest Payment Date to which interest has been paid or duly made
available for payment (or from, and including, the Original Issue Date if no
interest has been paid or duly made available for payment) to, but excluding,
the applicable Interest Payment Date or the Maturity Date, as the case may be
(each, an "Interest Period"). The interest so payable, and punctually paid or
duly made available for payment, on any Interest Payment Date will, subject to
certain exceptions described herein, be paid to the person in whose name this
Note (or one or more predecessor Notes) is registered at the close of business
on the fifteenth calendar day (whether or not a Business Day, as defined on the
reverse hereof) immediately preceding such Interest Payment Date (the "Record
Date"); provided, however, that interest payable on the Maturity Date will be
payable to the person to whom the principal hereof and premium, if any, hereon
shall be payable. Any such interest not so punctually paid or duly made
available for payment ("Defaulted Interest") will forthwith cease to be payable
to the holder on any Record Date, and shall be paid to the person in whose name
this Note is registered at the close of business on a special record date (the
"Special Record Date") for the payment of such Defaulted Interest to be fixed by
the Trustee hereinafter referred to, notice whereof shall be given to the holder
of this Note by the Trustee not less than 10 calendar days prior to such Special
Record Date or may be paid at any time in any other lawful manner not
inconsistent with the requirements of any securities exchange on which this note
may be listed, and upon such notice as may be required by such exchange, all as
more fully provided for in the Indenture.

         Payment of principal, premium, if any, and interest in respect of this
Note due on the Maturity Date will be made in immediately available funds upon
presentation and surrender of this Note (and, with respect to any applicable
repayment of this Note, a duly completed election form as contemplated on the
reverse hereof) at the corporate trust office of the Trustee maintained for that
purpose in the Borough of Manhattan, The City of New York, currently located at
c/o First Chicago Trust Company of New York, 14 Wall Street, New York, New York 
10005, or at such other paying agency in 

                                       4
<PAGE>   5
the Borough of Manhattan, The City of New York, as the Company may determine.
Payment of interest due on any Interest Payment Date other than the Maturity
Date will be made by check mailed to the address of the person entitled thereto
as such address shall appear in the Security Register maintained at the
aforementioned office of the Trustee; provided, however, that a holder of
U.S.$10,000,000 or more in aggregate principal amount of Notes (whether having
identical or different terms and provisions) will be entitled to receive
interest payments on such Interest Payment Date by wire transfer of immediately
available funds if appropriate wire transfer instructions have been received in
writing by the Trustee not less than 15 days prior to such Interest Payment
Date. Any such wire transfer instructions received by the Trustee shall remain
in effect until revoked by such holder.

         If any Interest Payment Date other than the Maturity Date would
otherwise be a day that is not a Business Day, such Interest Payment Date shall
be postponed to the next succeeding Business Day, except that if LIBOR is an
applicable Interest Rate Basis and such Business Day falls in the next
succeeding calendar month, such Interest Payment Date shall be the immediately
preceding Business Day. If the Maturity Date falls on a day that is not a
Business Day, the required payment of principal, premium, if any, and interest
shall be made on the next succeeding Business Day with the same force and effect
as if made on the date such payment was due, and no interest shall accrue with
respect to such payment for the period from and after the Maturity Date to the
date of such payment on the next succeeding Business Day.

         The Company is obligated to make payment of principal, premium, if any,
and interest in respect of this Note in United States dollars.

         Reference is hereby made to the further provisions of this Note set
forth on the reverse hereof and, if so specified above, in the Addendum hereto,
which further provisions shall have the same force and effect as if set forth on
the face hereof.

         Notwithstanding any provisions to the contrary contained herein, if the
face of this Note specifies that an Addendum is attached hereto or that
"Other/Additional Provisions" apply, this Note shall be subject to the terms set
forth in such Addendum or such "Other/Additional Provisions".

         Unless the Certificate of Authentication hereon has been executed by
the Trustee by manual signature, this Note shall not be entitled to any benefit
under the Indenture or be valid or obligatory for any purpose.

         IN WITNESS WHEREOF, SEMCO Energy, Inc. has caused this Note to be duly 
executed.

                                            SEMCO Energy, Inc.


                                            By________________________________
                                               Title:

Dated:

                                      5
<PAGE>   6
TRUSTEE'S CERTIFICATE OF AUTHENTICATION:

This is one of the Securities of 
the series designated therein referred 
to in the within-mentioned Indenture.



NBD Bank,
as Trustee


By____________________________
    Authorized Signatory

                                       6
<PAGE>   7


                                [REVERSE OF NOTE]

                               SEMCO Energy, Inc.
                                MEDIUM-TERM NOTE
                                 (Floating Rate)


         This Note is one of a duly authorized series of Debt Securities (the
"Debt Securities") of the Company issued and to be issued under an Indenture,
dated as of ______________, 1998, as amended, modified or supplemented from time
to time (the "Indenture"), between the Company and NBD Bank, as Trustee (the
"Trustee", which term includes any successor trustee under the Indenture), to
which Indenture and all indentures supplemental thereto reference is hereby made
for a statement of the respective rights, limitations of rights, duties and
immunities thereunder of the Company, the Trustee and the holders of the Debt
Securities, and of the terms upon which the Debt Securities are, and are to be,
authenticated and delivered. This Note is one of a series of Debt Securities
designated as "___________________________________________________________"
(the "Notes"). All terms used but not defined in this Note specified on the face
hereof or in an Addendum hereto shall have the meanings assigned to such terms
in the Indenture.

         This Note is issuable only in registered form without coupons in
minimum denominations of U.S.$1,000 and integral multiples thereof or the
minimum Authorized Denomination specified on the face hereof.

         This Note will not be subject to any sinking fund and, unless otherwise
provided on the face hereof in accordance with the provisions of the following
two paragraphs, will not be redeemable or repayable prior to the Stated Maturity
Date.

         This Note will be subject to redemption at the option of the Company on
any date on or after the Initial Redemption Date, if any, specified on the face
hereof, in whole or from time to time in part in increments of U.S.$1,000 or the
minimum Authorized Denomination (provided that any remaining principal amount
hereof shall be at least U.S.$1,000 or such minimum Authorized 

                                       7
<PAGE>   8
Denomination), at the Redemption Price (as defined below), together with unpaid
interest accrued thereon to the date fixed for redemption (each, a "Redemption
Date"), on notice given no more than 60 nor less than 30 calendar days prior to
the Redemption Date and in accordance with the provisions of the Indenture. The
"Redemption Price" shall initially be the Initial Redemption Percentage
specified on the face hereof multiplied by the unpaid principal amount of this
Note to be redeemed. The Initial Redemption Percentage shall decline at each
anniversary of the Initial Redemption Date by the Annual Redemption Percentage
Reduction, if any, specified on the face hereof until the Redemption Price is
100% of unpaid principal amount to be redeemed. In the event of repayment of
this Note in part only, a new Note of like tenor for the unrepaid portion
hereof and otherwise having the same terms as this Note shall be issued in the
name of the holder hereof upon the presentation and surrender hereof.

         If the Interest Category of this Note is specified on the face hereof
as an Original Issue Discount Note, the amount payable to the holder of this
Note in the event of redemption, repayment or acceleration of maturity of this
Note will be equal to the sum of (1) the Issue Price specified on the face
hereof (increased by any accruals of the Discount, as defined below) and, in the
event of any redemption of this Note (if applicable), multiplied by the Initial
Redemption Percentage (as adjusted by the Annual Redemption Percentage
Reduction, if applicable) and (2) any unpaid interest on this Note accrued from
the Original Issue Date to the Redemption Date, Repayment Date or date of
acceleration of maturity, as the case may be. The difference between the Issue
Price and 100% of the principal amount of this Note is referred to herein as the
"Discount."

         For purposes of determining the amount of Discount that has accrued as
of any Redemption Date, Repayment Date or date of acceleration of maturity of
this Note, such Discount will be accrued so as to cause an assumed yield on the
Note to be constant. The assumed constant yield will be calculated using a
30-day month, 360-day year convention, a compounding period that, except for the
Initial Period (as defined below), corresponds to the shortest period between
Interest Payment Dates (with ratable accruals within a compounding period), a
constant coupon rate equal to the initial interest rate applicable to this Note
and an assumption that the maturity of this Note will not be accelerated. If the
period from the Original Issue Date to the initial Interest Payment Date (the
"Initial Period") is shorter than the compounding period for this Note, a
proportionate amount of the yield for an entire compounding period will be
accrued. If the Initial Period is longer than the compounding period, then such
period will be divided into a regular compounding period and a short period,
with the short period being treated as provided in the preceding sentence.

         The interest rate borne by this Note will be determined as follows:

                  (i) Unless the Interest Category of this Note is specified on
         the face hereof as a "Floating Rate/Fixed Rate Note", an "Inverse
         Floating Rate Note", or as having an Addendum attached or having 
         "Other/Additional Provisions" apply, in each case relating to a 
         different interest rate formula, this Note shall be designated as a 
         "Regular Floating Rate Note" and, except as set forth below or on the
         face hereof, will bear interest at the rate determined by reference to
         the applicable Interest Rate Basis or Bases (a) plus or minus the 
         Spread, if any, and/or (b) multiplied by the Spread Multiplier, if any,
         in each case as specified on the face hereof. Commencing on the Initial
         Interest Reset Date, the rate at which interest on this Note shall be
         payable shall be reset as of each Interest Reset Date specified on the
         face hereof; provided, however, that the interest rate in effect for
         the period, if any, from the Original Issue Date to the Initial
         Interest Reset Date will be the Initial Interest Rate.

                                       8
<PAGE>   9

                  (ii) If the Interest Category of this Note is specified on the
         face hereof as a "Floating Rate/Fixed Rate Note", then, except as set
         forth below or on the face hereof, this Note will bear interest at the
         rate determined by reference to the applicable Interest Rate Basis or
         Bases (a) plus or minus the Spread, if any, and/or (b) multiplied by
         the Spread Multiplier, if any. Commencing on the Initial Interest Reset
         Date, the rate at which interest on this Note shall be payable shall be
         reset as of each Interest Reset Date; provided, however, that (y) the
         interest rate in effect for the period, if any, from the Original Issue
         Date to the Initial Interest Reset Date will be the Initial Interest
         Rate and (z) the interest rate in effect for the period commencing on
         the Fixed Rate Commencement Date specified on the face hereof to the
         Maturity Date shall be the Fixed Interest Rate specified on the face
         hereof or, if no such Fixed Interest Rate is specified, the interest
         rate in effect hereon on the day immediately preceding the Fixed Rate
         Commencement Date.

                  (iii) If the Interest Category of this Note is specified on
         the face hereof as an "Inverse Floating Rate Note", then, except as set
         forth below or on the face hereof, this Note will bear interest at the
         Fixed Interest Rate minus the rate determined by reference to the
         applicable Interest Rate Basis or Bases (a) plus or minus the Spread,
         if any, and/or (b) multiplied by the Spread Multiplier, if any;
         provided, however, that, unless otherwise specified on the face hereof,
         the interest rate hereon will not be less than zero. Commencing on the
         Initial Interest Reset Date, the rate at which interest on this Note
         shall be payable shall be reset as of each Interest Reset Date;
         provided, however, that the interest rate in effect for the period, if
         any, from the Original Issue Date to the Initial Interest Reset Date
         will be the Initial Interest Rate.

         Unless otherwise specified on the face hereof, the rate with respect to
each Interest Rate Basis will be determined in accordance with the applicable
provisions below. Except as set forth above or on the face hereof, the interest
rate in effect on each day shall be (i) if such day is an Interest Reset Date,
the interest rate determined as of the Interest Determination Date (as defined
below) immediately preceding such Interest Reset Date or (ii) if such day is not
an Interest Reset Date, the interest rate determined as of the Interest
Determination Date immediately preceding the most recent Interest Reset Date.

         If any Interest Reset Date would otherwise be a day that is not a
Business Day, such Interest Reset Date shall be postponed to the next succeeding
Business Day, except that if LIBOR is an applicable Interest Rate Basis and such
Business Day falls in the next succeeding calendar month, such Interest Reset
Date shall be the immediately preceding Business Day. In addition, if the
Treasury Rate is an applicable Interest Rate Basis and the Interest
Determination Date would otherwise fall on an Interest Reset Date, then such
Interest Reset Date will be postponed to the next succeeding Business Day.

         As used herein, "Business Day" means any day, other than a Saturday or
Sunday, that is neither a legal holiday nor a day on which banking institutions
are authorized or required by law or executive order to close in The City of New
York; provided, however, that if LIBOR is an applicable Interest Rate Basis,
such day is also a London Business Day (as defined below). "London Business Day"
means a day on which dealings in United States dollars are transacted in 

                                       9
<PAGE>   10
the London interbank market.

         The "Interest Determination Date" with respect to the CD Rate, the CMT
Rate, the Commercial Paper Rate, the Federal Funds Rate and the Prime Rate will
be the second Business Day immediately preceding the applicable Interest Reset
Date; the "Interest Determination Date" with respect to the Eleventh District
Cost of Funds Rate shall be the last working day of the month immediately
preceding the applicable Interest Reset Date on which the Federal Home Loan Bank
of San Francisco (the "FHLB of San Francisco") publishes the Index (as defined
below); and the "Interest Determination Date" with respect to LIBOR shall be the
second London Business Day immediately preceding the applicable Interest Reset
Date. The "Interest Determination Date" with respect to the Treasury Rate shall
be the day in the week in which the applicable Interest Reset Date falls on
which day Treasury Bills (as defined below) are normally auctioned (Treasury
Bills are normally sold at an auction held on Monday of each week, unless that
day is a legal holiday, in which case the auction is normally held on the
following Tuesday, except that such auction may be held on the preceding
Friday); provided, however, that if an auction is held on the Friday of the week
preceding the applicable Interest Reset Date, the Interest Determination Date
shall be such preceding Friday; provided, further, that if the Interest
Determination Date would otherwise fall on an Interest Reset Date, then such
Interest Reset Date will be postponed to the next succeeding Business Day.
If the interest rate of this Note is determined with reference to two or 
more Interest Rate Bases specified on the face hereof, the "Interest 
Determination Date" pertaining to this Note shall be the most recent 
Business Day which is at least two Business Days prior to the applicable
Interest Reset Date on which each Interest Rate Basis is determinable. Each
Interest Rate Basis shall be determined as of such date, and the applicable
interest rate shall take effect on the related Interest Reset Date.

         CD Rate. If an Interest Rate Basis for this Note is specified on the
face hereof as the CD Rate, the CD Rate shall be determined as of the applicable
Interest Determination Date (a "CD Rate Interest Determination Date") as the
rate on such date for negotiable United States dollar certificates of deposit
having the Index Maturity specified on the face hereof as published by the Board
of Governors of the Federal Reserve System in "Statistical Release H.15(519),
Selected Interest Rates" or any successor publication ("H.15(519)") under the
heading "CDs (Secondary Market)", or, if not published by 3:00 P.M., New York
City time, on the related Calculation Date (as defined below), the rate on such
CD Rate Interest Determination Date for negotiable United States dollar
certificates of deposit of the Index Maturity as published by the Federal
Reserve Bank of New York in its daily statistical release "Composite 3:30 P.M.
Quotations for United States Government Securities" or any successor publication
("Composite Quotations") under the heading "Certificates of Deposit". If such
rate is not yet published in either H.15(519) or Composite Quotations by 3:00
P.M., New York City time, on the related Calculation Date, then the CD Rate on
such CD Rate Interest Determination Date will be calculated by the Calculation
Agent specified on the face hereof and will be the arithmetic mean of the
secondary market offered rates as of 10:00 A.M., New York City time, on such CD
Rate Interest Determination Date, of three leading nonbank dealers in negotiable
United States dollar certificates of deposit in The City of New York (which may
include the Agents or their affiliates) selected by the Calculation Agent for
negotiable United States dollar certificates of deposit of major United States
money center banks for negotiable United States dollar certificates of deposit
with a remaining maturity closest to the Index Maturity in an amount that is
representative for a single transaction in that market at that time; provided,
however, that if the dealers so selected by the Calculation Agent are not
quoting as mentioned in this sentence, the CD Rate determined as of such CD Rate
Interest Determination Date will be the CD Rate in effect on such CD Rate
Interest 

                                       10
<PAGE>   11
Determination Date.

         CMT Rate. If an Interest Rate Basis for this Note is specified on the
face hereof as the CMT rate, the CMT Rate shall be determined as of the
applicable Interest Determination Date (a "CMT Rate Interest Determination
Date") as the rate displayed on the Designated CMT Telerate Page (as defined
below) under the caption "...Treasury Constant Maturities...Federal Reserve
Board Release H.15...Mondays Approximately 3:45 P.M.", under the column for the
Designated CMT Maturity Index (as defined below) for (i) if the Designated CMT
Telerate Page is 7055, the rate on such CMT Rate Interest Determination Date and
(ii) if the Designated CMT Telerate Page is 7052, the weekly or monthly average,
as specified on the face hereof, for the week or month, as applicable, ended
immediately preceding the week or the month, as applicable in which the related
CMT Rate Interest Determination Date falls. If such rate is no longer displayed
on the relevant page or is not displayed by 3:00 P.M., New York City time, on
the related Calculation Date, then the CMT Rate for such CMT Rate Interest
Determination Date will be such treasury constant maturity rate for the
Designated CMT Maturity Index as published in the relevant H.15(519). If such
rate is no longer published or is not published by 3:00 P.M., New York City
time, on the related Calculation Date, then the CMT Rate on such CMT Rate
Interest Determination Date will be such treasury constant maturity rate for the
Designated CMT Maturity Index (or other United States Treasury rate for the
Designated CMT Maturity Index) for the CMT Rate Interest Determination Date with
respect to such Interest Reset Date as may then be published by either the Board
of Governors of the Federal Reserve System or the United States Department of
the Treasury that the Calculation Agent determines to be comparable to the rate
formerly displayed on the Designated CMT Telerate Page and published in the
relevant H.15(519). If such information is not provided by 3:00 P.M., New York
City time, on the related Calculation Date, then the CMT Rate on the CMT Rate
Interest Determination Date will be calculated by the Calculation Agent and will
be a yield to maturity, based on the arithmetic mean of the secondary market
offered rates as of approximately 3:30 P.M., New York City time, on such CMT
Rate Interest Determination Date reported, according to their written records,
by three leading primary United States government securities dealers in The City
of New York (which may include the Agents or their affiliates)(each, a
"Reference Dealer") selected by the Calculation Agent (from five such Reference
Dealers selected by the Calculation Agent and eliminating the highest quotation
(or, in the event of equality, one of the highest) and the lowest quotation (or,
in the event of equality, one of the lowest)), for the most recently issued
direct noncallable fixed rate obligations of the United States ("Treasury
Notes") with an original maturity of approximately the Designated CMT Maturity
Index and a remaining term to maturity of not less than such Designated CMT
Maturity Index minus one year. If the Calculation Agent is unable to obtain
three such Treasury Note quotations, the CMT Rate on such CMT Rate Interest
Determination Date will be calculated by the Calculation Agent and will be a
yield to maturity based on the arithmetic mean of the secondary market offered
rates as of approximately 3:30 P.M., New York City time, on such CMT Rate
Interest Determination Date of three Reference Dealers in The City of New York
(from five such Reference Dealers selected by the Calculation Agent and
eliminating the highest quotation (or, in the event of equality, one of the
highest) and the lowest quotation (or, in the event of equality, one of the
lowest)), for Treasury Notes with an original maturity of the number of years
that is the next highest to the Designated CMT Maturity Index and a remaining
term to maturity closest to the Designated CMT Maturity Index and in an amount
of at least U.S.$100 million. If three or four (and not five) of such Reference
Dealers are quoting as described above, then the CMT Rate will be based on the
arithmetic mean of the offered rates obtained and neither the highest nor the
lowest of such 

                                       11
<PAGE>   12
quotes will be eliminated; provided, however, that if fewer than
three Reference Dealers selected by the Calculation Agent are quoting as
mentioned herein, the CMT Rate determined as of such CMT Rate Interest
Determination Date will be the CMT Rate in effect on such CMT Rate Interest
Determination Date. If two Treasury Notes with an original maturity as described
in the second preceding sentence have remaining terms to maturity equally close
to the Designated CMT Maturity Index, the Calculation Agent will obtain
quotations for the Treasury Note with the shorter remaining term to maturity.

         "Designated CMT Telerate Page" means the display on the Dow Jones
Markets Limited (or any successor service) on the page specified on the face
hereof (or any other page as may replace such page on such service) for the
purpose of displaying Treasury Constant Maturities as reported in H.15(519). If
no such page is specified on the face hereof, the Designated CMT Telerate Page
shall be 7052, for the most recent week.

         "Designated CMT Maturity Index" means the original period to maturity
of the United States Treasury securities (either 1, 2, 3, 5, 7, 10, 20 or 30
years) specified on the face hereof with respect to which the CMT Rate will be
calculated. If no such maturity is specified on the face hereof, the Designated
CMT Maturity Index shall be 2 years.

         Commercial Paper Rate. If an Interest Rate Basis for this Note is
specified on the face hereof as the Commercial Paper Rate, the Commercial Paper
Rate shall be determined as of the applicable Interest Determination Date (a
"Commercial Paper Rate Interest Determination Date") as the Money Market Yield
(as defined below) on such date of the rate for commercial paper having the
Index Maturity as published in H.15(519) under the heading "Commercial
Paper-Nonfinancial". In the event that such rate is not published by 3:00 P.M.,
New York City time, on the related Calculation Date, then the Commercial Paper
Rate on such Commercial Paper Rate Interest Determination Date will be the Money
Market Yield of the rate for commercial paper having the Index Maturity as
published in Composite Quotations under the caption "Commercial Paper" (with an
Index Maturity of one month or three months being deemed to be equivalent to an
Index Maturity of 30 days or 90 days, respectively). If such rate is not yet
published in either H.15(519) or Composite Quotations by 3:00 P.M., New York
City time, on the related Calculation Date, then the Commercial Paper Rate on
such Commercial Paper Rate Interest Determination Date will be calculated by the
Calculation Agent and will be the Money Market Yield of the arithmetic mean of
the offered rates at approximately 11:00 A.M., New York City time, on such
Commercial Paper Rate Interest Determination Date of three leading dealers of
commercial paper in The City of New York (which may include the Agents or their
affiliates) selected by the Calculation Agent for commercial paper having the
Index Maturity whose bond rating is "Aa", or the equivalent, from a nationally
recognized statistical rating organization; provided, however, that if the
dealers so selected by the Calculation Agent are not quoting as mentioned in
this sentence, the Commercial Paper Rate determined as of such Commercial Paper
Rate Interest Determination Date will be the Commercial Paper Rate in effect on
such Commercial Paper Rate Interest Determination Date.

         "Money Market Yield" means a yield (expressed as a percentage)
calculated in accordance with the following formula:

                              D x 360/     
         Money Market Yield = -------- x 100
                              360 - (D x M)
                              
                                       12
<PAGE>   13
                                  
                                     
where "D" refers to the applicable per annum rate for commercial paper quoted on
a bank discount basis and expressed as a decimal, and "M" refers to the actual
number of days in the applicable Interest Reset Period.

         Eleventh District Cost of Funds Rate. If an Interest Rate Basis for
this Note is specified on the face hereof as the Eleventh District Cost of Funds
Rate, the Eleventh District Cost of Funds Rate shall be determined as of the
applicable Interest Determination Date (an "Eleventh District Cost of Funds Rate
Interest Determination Date") as the rate equal to the monthly weighted average
cost of funds for the calendar month immediately preceding the month in which
such Eleventh District Cost of Funds Rate Interest Determination Date falls, as
set forth under the caption "11th District" on Telerate Page 7058 as of 11:00
A.M., San Francisco time, on such Eleventh District Cost of Funds Rate Interest
Determination Date. If such rate does not appear on Telerate Page 7058 on such
Eleventh District Cost of Funds Rate Interest Determination Date, then the
Eleventh District Cost of Funds Rate on such Eleventh District Cost of Funds
Rate Interest Determination Date shall be the monthly weighted average cost of
funds paid by member institutions of the Eleventh Federal Home Loan Bank
District that was most recently announced (the "Index") by the FHLB of San
Francisco as such cost of funds for the calendar month immediately preceding
such Eleventh District Cost of Funds Rate Interest Determination Date. If the
FHLB of San Francisco fails to announce the Index on or prior to such Eleventh
District Cost of Funds Rate Interest Determination Date for the calendar month
immediately preceding such Eleventh District Cost of Funds Rate Interest
Determination Date, the Eleventh District Cost of Funds Rate determined as of
such Eleventh District Cost of Funds Rate Interest Determination Date will be
the Eleventh District Cost of Funds Rate in effect on such Eleventh District
Cost of Funds Rate Interest Determination Date.

         Federal Funds Rate. If an Interest Rate Basis for this Note is
specified on the face hereof as the Federal Funds Rate, the Federal Funds Rate
shall be determined as of the applicable Interest Determination Date (a "Federal
Funds Rate Interest Determination Date") as the rate on such date for United
States dollar federal funds as published in H.15(519) under the heading "Federal
Funds (Effective)" or, if not published by 3:00 P.M., New York City time, on the
Calculation Date, the rate on such Federal Funds Rate Interest Determination
Date as published in Composite Quotations under the heading "Federal
Funds/Effective Rate". If such rate is not published in either H.15(519) or
Composite Quotations by 3:00 P.M., New York City time, on the related
Calculation Date, then the Federal Funds Rate on such Federal Funds Rate
Interest Determination Date will be calculated by the Calculation Agent and will
be the arithmetic mean of the rates for the last transaction in overnight United
States dollar federal funds arranged by three leading brokers of federal funds
transactions in The City of New York (which may include the Agents or their
affiliates) selected by the Calculation Agent prior to 9:00 A.M., New York City
time, on such Federal Funds Rate Interest Determination Date; provided, however,
that if the brokers so selected by the Calculation Agent are not quoting as
mentioned in this sentence, the Federal Funds Rate determined as of such Federal
Funds Rate Interest Determination Date will be the Federal Funds Rate in effect
on such Federal Funds Rate Interest Determination Date.

         LIBOR. If an Interest Rate Basis for this Note is specified on the face
hereof as LIBOR, LIBOR shall be determined by the Calculation Agent as of the
applicable Interest Determination 

                                       13
<PAGE>   14

Date (a "LIBOR Interest Determination Date") in accordance with the following
provisions:

          (i) if (a) "LIBOR Reuters" is specified on the face hereof, the
arithmetic mean of the offered rates (unless the Designated LIBOR Page (as
defined below) by its terms provides only for a single rate, in which case such
single rate shall be used) for deposits in United States dollars having the
Index Maturity, commencing on the applicable Interest Reset Date, that appear
(or, if only a single rate is required as aforesaid, appears) on the Designated
LIBOR Page (as defined below) as of 11:00 A.M., London time, on such LIBOR
Interest Determination Date, or (b) "LIBOR Telerate" is specified on the face
hereof, or if neither "LIBOR Reuters" nor "LIBOR Telerate" is specified on the
face hereof as the method for calculating LIBOR, the rate for deposits in United
States dollars having the Index Maturity, commencing on such Interest Reset
Date, that appears on the Designated LIBOR Page as of 11:00 A.M., London time,
on such LIBOR Interest Determination Date. If fewer than two such offered rates
appear, or if no such rate appears, as applicable, LIBOR on such LIBOR Interest
Determination Date will be determined in accordance with the provisions
described in clause (ii) below.

         (ii) With respect to a LIBOR Interest Determination Date on which fewer
than two offered rates appear, or no rate appears, as the case may be, on the
Designated LIBOR Page as specified in clause (i) above, the Calculation Agent
will request the principal London offices of each of four major reference banks
(which may include affiliates of the Agents) in the London interbank market, as
selected by the Calculation Agent, to provide the Calculation Agent with its
offered quotation for deposits in United States dollars for the period of the
Index Maturity, commencing on the applicable Interest Reset Date, to prime banks
in the London interbank market at approximately 11:00 A.M., London time, on such
LIBOR Interest Determination Date and in a principal amount that is
representative for a single transaction in United States dollars in such market
at such time. If at least two such quotations are so provided, then LIBOR on
such LIBOR Interest Determination Date will be the arithmetic mean of such
quotations. If fewer than two such quotations are so provided, then LIBOR on
such LIBOR Interest Determination Date will be the arithmetic mean of the rates
quoted at approximately 11:00 A.M., New York City time, on such LIBOR Interest
Determination Date by three major banks (which may include affiliates of the
Agents) in the City of New York, selected by the Calculation Agent for loans in
United States dollars to leading European banks, having the Index Maturity and
in a principal amount that is representative for a single transaction in United
States dollars in such market at such time; provided, however, that if the banks
so selected by the Calculation Agent are not quoting as mentioned in this
sentence, LIBOR determined as of such LIBOR Interest Determination Date will be
LIBOR in effect on such LIBOR Interest Determination Date.

         "Designated LIBOR Page" means (a) if "LIBOR Reuters" is specified on
the face hereof, the display on the Reuter Monitor Money Rates Service (or any
successor service) for the purpose of displaying the London interbank rates of
major banks for United States dollars, or (b) if "LIBOR Telerate" is specified
on the face hereof or neither "LIBOR Reuters" nor "LIBOR Telerate" is specified
on the face hereof as the method for calculating LIBOR, the display on the Dow
Jones Markets Limited (or any successor service) for the purpose of displaying
the London interbank rates of major banks for United States dollars.

         Prime Rate. If an Interest Rate Basis for this Note is specified on the
face hereto as the Prime Rate, the Prime Rate shall be determined as of the
applicable Interest Determination Date 


                                       14
<PAGE>   15
(a "Prime Rate Interest Determination Date") as the rate on such date as such
rate is published in H.15(519) under the heading "Bank Prime Loan". If such rate
is not published prior to 3:00 P.M., New York City time, on the related
Calculation Date, then the Prime Rate shall be the arithmetic mean of the rates
of interest publicly announced by each bank that appears on the Reuters Screen
USPRIME1 Page (as defined below) as such bank's prime rate or base lending rate
as in effect for such Prime Rate Interest Determination Date. If fewer than four
such rates appear on the Reuters Screen USPRIME1 Page for such Prime Rate
Interest Determination Date, the Prime Rate shall be the arithmetic mean of the
prime rates or base lending rates quoted on the basis of the actual number of
days in the year divided by a 360-day year as of the close of business on such
Prime Rate Interest Determination Date by four major money center banks (which
may include affiliates of the Agents) in The City of New York selected by the
Calculation Agent. If fewer than four such quotations are so provided, then the
Prime Rate shall be the arithmetic mean of four prime rates quoted on the basis
of the actual number of days in the year divided by a 360-day year as of the
close of business on such Prime Rate Interest Determination Date as furnished in
The City of New York by the major money center banks, if any, that have provided
such quotations and by a reasonable number of substitute banks or trust
companies (which may include affiliates of the Agents) to obtain four such prime
rate quotations, provided such substitute banks or trust companies are organized
and doing business under the laws of the United States, or any State thereof,
each having total equity capital of at least U.S.$500 million and being subject
to supervision or examination by Federal or State authority, selected by the
Calculation Agent to provide such rate or rates; provided, however, that if the
banks or trust companies so selected by the Calculation Agent are not quoting as
mentioned in this sentence, the Prime Rate determined as of such Prime Rate
Interest Determination Date will be the Prime Rate in effect on such Prime Rate
Interest Determination Date.

         "Reuters Screen USPRIME1 Page" means the display on the Reuter Monitor
Money Rates Service (or such other page as may replace the USPRIME1 page on such
service) for the purpose of displaying prime rates or base lending rates of
major United States banks.

         Treasury Rate. If an Interest Rate Basis for this Note is specified on
the face hereof as the Treasury Rate, the Treasury Rate shall be determined as
of the applicable Interest Determination Date (a "Treasury Rate Interest
Determination Date") as the rate from the auction held on such Treasury Rate
Interest Determination Date (the "Auction") of direct obligations of the United
States ("Treasury Bills") having the Index Maturity, as such rate is published
in H.15(519) under the heading "Treasury Bills-auction average (investment)" or,
if not published by 3:00 P.M., New York City time, on the related Calculation
Date, the auction average rate of such Treasury Bills (expressed as a bond
equivalent on the basis of a year of 365 or 366 days, as applicable, and applied
on a daily basis) as otherwise announced by the United States Department of the
Treasury. In the event that the results of the Auction of Treasury Bills having
the Index Maturity are not reported as provided by 3:00 P.M., New York City
time, on the related Calculation Date, or if no such Auction is held, then the
Treasury Rate will be calculated by the Calculation Agent and will be a yield to
maturity (expressed as a bond equivalent on the basis of a year of 365 or 366
days, as applicable, and applied on a daily basis) of the arithmetic mean of the
secondary market bid rates, as of approximately 3:30 P.M., New York City time,
on such Treasury Rate Interest Determination Date, of three leading primary
United States government securities dealers (which may include the Agents or
their affiliates) selected by the Calculation Agent, for the issue of Treasury
Bills with a remaining maturity closest to the Index Maturity; provided,

                                       15
<PAGE>   16

however, that if the dealers so selected by the Calculation Agent are not
quoting as mentioned in this sentence, the Treasury Rate determined as of such
Treasury Rate Interest Determination Date will be the Treasury Rate in effect on
such Treasury Rate Interest Determination Date.

         Notwithstanding the foregoing, the interest rate hereon shall not be
greater than the Maximum Interest Rate, if any, or less than the Minimum
Interest Rate, if any, in each case as specified on the face hereof. The
interest rate on this Note will in no event be higher than the maximum rate
permitted by New York law, as the same may be modified by United States law of
general application.

         The Calculation Agent shall calculate the interest rate hereon on or
before each Calculation Date. The "Calculation Date", if applicable, pertaining
to any Interest Determination Date shall be the earlier of (i) the tenth
calendar day after such Interest Determination Date or, if such day is not a
Business Day, the next succeeding Business Day or (ii) the Business Day
immediately preceding the applicable Interest Payment Date or the Maturity Date,
as the case may be. At the request of the Holder hereof, the Calculation Agent
will provide to the Holder hereof the interest rate hereon then in effect and,
if determined, the interest rate that will become effective as a result of a
determination made for the next succeeding Interest Reset Date.

         Accrued interest hereon shall be an amount calculated by multiplying
the principal amount hereof by an accrued interest factor. Such accrued interest
factor shall be computed by adding the interest factor calculated for each day
in the applicable Interest Period. Unless otherwise specified as the Day Count
Convention on the face hereof, the interest factor for each such date shall be
computed by dividing the interest rate applicable to such day by 360 if the CD
Rate, the Commercial Paper Rate, the Eleventh District Cost of Funds Rate, the
Federal Funds Rate, LIBOR or the Prime Rate is an applicable Interest Rate Basis
or by the actual number of days in the year if the CMT Rate or the Treasury Rate
is an applicable Interest Rate Basis. Unless otherwise specified as the Day
Count Convention on the face hereof, the interest factor for this Note, if the
interest rate is calculated with reference to two or more Interest Rate Bases,
will be calculated in each period in the same manner as if only the Applicable
Interest Rate Basis specified on the face hereof applied.

         All percentages resulting from any calculation on this Note shall be
rounded to the nearest one hundred-thousandth of a percentage point, with five
one-millionths of a percentage point rounded upwards, and all amounts used in or
resulting from such calculation on this Note shall be rounded to the nearest
cent (with one-half cent or unit being rounded upwards).

         If an Event of Default, as defined in the Indenture, shall occur and be
continuing, the principal of the Notes may be declared due and payable in the
manner and with the effect provided in the Indenture.

         The Indenture contains provisions for defeasance of (i) the entire
indebtedness of the Notes or (ii) certain covenants and Events of Default with
respect to the Notes, in each case upon compliance with certain conditions set
forth therein, which provisions apply to the Notes.

         The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the 

                                       16
<PAGE>   17
holders of the Debt Securities at any time by the Company and the Trustee with
the consent of the holders of not less than a majority of the aggregate
principal amount of all Debt Securities at the time outstanding and affected
thereby. The Indenture also contains provisions permitting the holders of not
less than a majority of the aggregate principal amount of the outstanding Debt
Securities of any series, on behalf of the holders of all such Debt Securities,
to waive compliance by the Company with certain provisions of the Indenture.
Furthermore, provisions in the Indenture permit the holders of not less than a
majority of the aggregate principal amount of the outstanding Debt Securities of
any series, in certain instances, to waive, on behalf of all of the holders of
Debt Securities of such series, certain past defaults under the Indenture and
their consequences. Any such consent or waiver by the holder of this Note shall
be conclusive and binding upon such holder and upon all future holders of this
Note and other Notes issued upon the registration of transfer hereof or in
exchange herefor or in lieu hereof, whether or not notation of such consent or
waiver is made upon this Note.

         No reference herein to the Indenture and no provision of this Note or
of the Indenture shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay principal, premium, if any, and interest in
respect of this Note at the times, places and rate or formula, and in the coin
or currency, herein prescribed.

         As provided in the Indenture and subject to certain limitations therein
and herein set forth, the transfer of this Note is registrable in the Security
Register of the Company upon surrender of this Note for registration of transfer
at the office or agency of the Company in any place where the principal hereof
and any premium or interest hereon are payable, duly endorsed by, or accompanied
by a written instrument of transfer in form satisfactory to the Company and the
Security Registrar duly executed by, the holder hereof or by his attorney duly
authorized in writing, and thereupon one or more new Notes, of authorized
denominations and for the same aggregate principal amount, will be issued to the
designated transferee or transferees.

         As provided in the Indenture and subject to certain limitations therein
and herein set forth, this Note is exchangeable for a like aggregate principal
amount of Notes of different authorized denominations but otherwise having the
same terms and conditions, as requested by the holder hereof surrendering the
same.

         No service charge shall be made for any such registration of transfer
or exchange, but the Company may require payment of a sum sufficient to cover
any tax or other governmental charge payable in connection therewith.

         Prior to due presentment of this Note for registration of transfer, the
Company, the Trustee and any agent of the Company or the Trustee may treat the
holder in whose name this Note is registered as the owner thereof for all
purposes, whether or not this Note be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

         The Indenture and this Note shall be governed by and construed in
accordance with the laws of the State of New York applicable to agreements made
and to be performed entirely in such State.

                                       17

<PAGE>   18



                                  ABBREVIATIONS

         The following abbreviations, when used in the inscription on the face
of this Note, shall be construed as though they were written out in full
according to applicable laws or regulations:

TEN COM - as tenants in common       UNIF GIFT MIN ACT - ______ Custodian _____
TEN ENT - as tenants by the entireties      (Cust) (Minor) 
JT TEN - as joint tenants with right of    under Uniform Gifts to Minors
          survivorship and not as tenants  Act_____________________
          in common                             (State)

     Additional abbreviations may also be used though not in the above list.


                       __________________________________

                                   ASSIGNMENT


FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and transfer(s) 
unto

PLEASE INSERT SOCIAL SECURITY OR
                  OTHER
IDENTIFYING NUMBER OF ASSIGNEE  
|             |
|_________________________|_____________________________________________________
________________________________________________________________________________
(Please print or typewrite name and address including postal zip code of 
assignee)
______________________________________________________________________________
this Note and all rights thereunder hereby irrevocably constituting and
appointing

 ____________________________________________________________________ Attorney
to transfer this Note on the books of the Trustee, with full power of
substitution in the premises.

Dated:_____________________           _______________________________________

                     _______________________________________
                                     Notice: The signature(s) on this Assignment
                                     must correspond with the name(s) as written
                                     upon the face of this Note in every
                                     particular, without alteration or 
                                     enlargement or any change whatsoever.

                                       18
<PAGE>   19
                            OPTION TO ELECT REPAYMENT

         The undersigned hereby irrevocably request(s) and instruct(s) the
Company to repay this Note (or portion hereof specified below) pursuant to its
terms at a price equal to 100% of the principal amount to be repaid, together
with unpaid interest accrued hereon to the Repayment Date, to the undersigned,
at _____________________________________________________________________________
________________________________________________________________________________
         (Please print or typewrite name and address of the undersigned)

         For this Note to be repaid, the Trustee must receive at its corporate
trust office in the Borough of Manhattan, The City of New York, currently
located at __________________________________________, not more than 60 nor less
than 30 calendar days prior to the Repayment Date, this Note with this "Option
to Elect Repayment" form duly completed.

         If less than the entire principal amount of this Note is to be repaid,
specify the portion hereof (which shall be increments of U.S.$1,000) which the
holder elects to have repaid of the Notes to be issued to the holder for the
portion of this Note not being repaid (in the absence of any such specification,
one such Note will be issued for the portion not being repaid).


Principal Amount
to be Repaid:  $__________                 ______________
                                               Notice:  The signature(s) on
Date: __________                               this Option to Elect Repayment
                                               must correspond with the name(s)
                                               as written upon the face of this
                                               Note in every particular, without
                                               alteration or enlargement or any
                                               change whatsoever.




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