Exhibit 10.15


                    STOCK PURCHASE AGREEMENT


       This Stock Purchase Agreement is made on March 15, 1999, 
between SEMCO Energy, Inc., a Michigan corporation (the "Seller 
Shareholder"), and CoEnergy Trading Company, a Michigan 
corporation ("Buyer"). 


                           BACKGROUND

A.     SEMCO Energy Services, Inc. (the "Company") is a Michigan 
       corporation and is engaged in the Business (as defined in 
       Section 11 below), with offices at various locations 
       including 405 Water Street, Port Huron, Michigan (the 
       "Premises"). 

B.     Seller Shareholder owns all of the Company's issued and 
       outstanding capital stock, being 100 shares of common 
       stock ("Company Common Stock").  Buyer desires to purchase 
       from Seller Shareholder, and Seller Shareholder desires to 
       sell to Buyer, all of the issued and outstanding Company 
       Common Stock (the "Purchased Shares") upon the terms and 
       subject to the conditions of this Agreement. 

C.     As a condition to Buyer's willingness to purchase the 
       Purchased Shares, Seller Shareholder has agreed to not 
       compete with Buyer or Company in the conduct of the 
       Business, as provided in Section 11 of this Agreement. 


                           AGREEMENTS

       NOW, THEREFORE, in consideration of the Background and the 
terms and conditions set forth in this Agreement, the Seller 
Shareholder and Buyer agree as follows: 

1.     AGREEMENT OF PURCHASE AND SALE OF THE PURCHASED SHARES. On 
       the terms and subject to the conditions set forth in this 
       Agreement, Seller Shareholder agrees to sell, assign, 
       transfer, set over, convey, and deliver to Buyer on the 
       Closing Date, but effective the close of business March 31, 
       1999 (the "Effective Date"), the Purchased Shares, free, 
       clear, and discharged of and from all Encumbrances (as 
       defined in Section 8.4), and Buyer agrees to purchase the 
       Purchased Shares from Seller Shareholder. 

2.     PURCHASE PRICE FOR PURCHASED SHARES.


                                1

2.1    Purchase Price. The purchase price Buyer will pay to 
       Seller Shareholder for the Purchased Shares (the "Purchase 
       Price") shall be One Million Nine Hundred Fifty Thousand 
       ($1,950,000.00) Dollars, subject to adjustment as provided 
       in Section 2.3. 

2.2    Payment of Purchase Price. The preliminary Purchase Price, 
       based upon the Preliminary Balance Sheet, shall be paid by 
       Buyer on the Closing Date by wire transfer of immediately 
       available funds, against receipt of the certificates for 
       the Purchased Shares duly endorsed for transfer or 
       accompanied by duly executed stock powers. 

2.3    Purchase-Price Adjustments.

       (a)    Seller Shareholder shall cause Company to prepare 
              an estimated balance sheet (the "Preliminary 
              Balance Sheet") as of the Effective Date or another 
              date agreed upon by Buyer and Seller Shareholder. 
              The Preliminary Balance Sheet (i) shall contain 
              line items substantially consistent with the line 
              items in Company's Balance Sheet dated December 31, 
              1998 (a true copy of which is contained in Schedule 
              8.10), (ii) shall be prepared in accordance with 
              generally accepted accounting principles 
              consistently applied ("GAAP"), (iii) shall be 
              accompanied by a certificate of the chief financial 
              officer of Company to the effect of clause (ii) 
              above, (iv) shall be accompanied by a calculation 
              of the Working Capital of Company (as defined 
              below) certified by Company's chief financial 
              officer,  and (v) consistent with Company's Balance 
              Sheet dated December 31, 1998 referenced above, 
              shall reflect no liabilities other than current 
              liabilities which are part of Working Capital as 
              defined below. 

       (b)    If Company's Working Capital is a positive number, 
              the Purchase Price shall be increased by the amount 
              of such positive number; and if Company's Working 
              Capital is a negative number, the Purchase Price 
              shall be reduced by the amount of such negative 
              number.  The term "Working Capital" shall mean an 
              amount equal to the current assets minus current 
              liabilities reflected on the Preliminary Balance 
              Sheet or the Closing Balance Sheet, as the context 
              indicates. 






                                2

       (c)    Buyer shall prepare a balance sheet as of the 
              Effective Date (the "Closing Balance Sheet").  The 
              Closing Balance Sheet (i) shall contain line items 
              substantially consistent with the line items in 
              Company's Balance Sheet dated December 31, 1998 and 
              (ii) shall be prepared in accordance with GAAP. 

       (d)    Buyer shall prepare the Closing Balance Sheet in 
              accordance with GAAP.  Buyer shall use its best 
              efforts to complete the Closing Balance Sheet not 
              later than 60 days after the Closing Date.  The 
              Closing Balance Sheet shall be delivered to Seller 
              Shareholder immediately upon its completion, 
              together with a calculation of Working Capital, and 
              Buyer's work papers.  Seller Shareholder shall have 
              30 days after receiving the Closing Balance Sheet, 
              the calculation of Working Capital, and Buyer's 
              work papers to deliver a written notice to Buyer of 
              any objections to the Closing Balance Sheet and the 
              calculation of Working Capital.  Any such notice of 
              objections shall be in writing and shall state in 
              reasonable detail the basis for each objection and 
              the amount of adjustment that Seller Shareholder 
              believes is required.  If Buyer and Seller 
              Shareholder cannot agree with respect to the 
              Closing Balance Sheet or the calculation of Working 
              Capital within 30 days after the delivery of a 
              notice of objections or such later date as Buyer 
              and Seller Shareholder may agree on, the dispute 
              shall be resolved by arbitration in accordance with 
              Section 13.8, except that in all events there shall 
              be a single arbitrator which shall be Ernst & Young 
              L.L.P. (the "Independent Accounting Firm").  Any 
              items not in dispute shall be deemed stipulated by 
              Buyer and Seller Shareholder and shall not be 
              determined by the Independent Accounting Firm.  The 
              determination of the Independent Accounting Firm 
              shall be binding and conclusive with regard to the 
              matters it determines.  Buyer and Seller 
              Shareholder shall pay equally all costs and 
              expenses relating to the services provided by the 
              Independent Accounting Firm, notwithstanding the 
              provisions of Section 13.8(f). 










                                3

       (e)    If the final Purchase Price based upon the Closing 
              Balance Sheet is more or less than the preliminary 
              Purchase Price paid on Closing Date, then (i) if 
              the Purchase Price has increased, Buyer shall pay 
              the amount of such increase to Seller Shareholder 
              within ten (10) days following determination of the 
              final Purchase Price, and (ii) if the Purchase 
              Price has decreased, Seller Shareholder shall pay 
              the amount of such decrease to Buyer within ten 
              (10) days following determination of the final 
              Purchase Price.  Notwithstanding anything herein to 
              the contrary, there will be no Purchase Price 
              adjustment related to the operation of the business 
              from the Effective Date through the Closing Date; 
              any income or loss for such period shall be for the 
              benefit or to the detriment of Buyer. 

3.     WINDING UP OF WHOLESALE SEGMENT. 

Company and Quantum Energy are parties to that certain Marketing 
Representative Agreement dated June 1, 1998 ("Quantum 
Agreement").  The Quantum Agreement covers a "Book of Business", 
defined as the gas sales and purchase agreements and associated 
transportation and storage and hedging agreements listed on 
Schedules 8.17(c), 8.17(d), 8.27(d) and 8.27(e) hereto ("Quantum 
Book").  The Quantum Book comprises the remaining Wholesale 
Segment of the Company's business. 

Company is negotiating the assignment of the Quantum Book to 
Marathon. 

In the event that the assignment of the Quantum Book to Marathon 
is not consummated by March 31, 1999, the Quantum Book will be 
retained by the Company, and Buyer will cause Company to perform 
the obligations of the Company under the Quantum Agreement and 
the contracts comprising the Quantum Book to be performed from 
and after the Effective Date and hold Seller Shareholder harmless 
from such obligations.  In the event that the assignment of the 
Quantum Book to Marathon is consummated by March 31, 1999, the 
cash payment or amount due from Quantum will be recorded on the 
Preliminary Balance Sheet and Final Balance Sheet as cash or an 
account receivable for purposes of the computation required under 
Section 2.3 hereof. 

4.     PRECLOSING ACTIONS. BEFORE THE CLOSING: 








                                4

4.1    Conduct of Business. Seller Shareholder shall cause 
       Company to carry on and conduct the Business only in the 
       ordinary course, without any change in the policies, 
       practices, and methods Company pursued before the date of 
       this Agreement; provided, however, Company shall continue 
       the already commenced process of Winding Up the Wholesale 
       Segment as described in Section 3. Other than Winding Up 
       the Wholesale Segment, Seller Shareholder will use 
       commercially reasonable efforts and cause Company to use 
       commercially reasonable efforts to preserve the Business; 
       to preserve the relationships with Company's customers, 
       suppliers, and others having business dealings with 
       Company; and to preserve the services of Company's 
       employees, agents, and representatives. Except for such 
       Winding Up but otherwise without limitation of the 
       foregoing, (a) Seller Shareholder will cause Company not 
       to undertake, without Buyer's prior written consent, any 
       action that, if taken prior to the date of this Agreement, 
       would be required to be disclosed on Schedule 8.12, and 
       (b) Seller Shareholder will cause Company not to take any 
       action or refrain from taking action that would result in 
       any change in Company's assets or liabilities, other than 
       in the ordinary course of business consistent with past 
       practices.  Seller Shareholder will consult with Buyer 
       regarding management of the Company. 

4.2    Access to Buyer. From the date of this Agreement through 
       the Closing, Seller Shareholder shall cause Company to 
       permit Buyer and its representatives to have access at all 
       reasonable times to Company's books, records, files and 
       employees. No such access, nor the due diligence 
       investigation of Company conducted by Buyer and its 
       representatives prior to the date hereof, shall affect the 
       representations and warranties of Seller Shareholder or 
       Buyer's right to rely upon such representations and 
       warranties. 

4.3    Accuracy of Representations and Warranties and 
       Satisfaction of Conditions. Seller Shareholder will 
       immediately advise Buyer in writing if (a) any of the 
       representations or warranties of Seller Shareholder is 
       untrue or incorrect in any material respect, or (b) Seller 
       Shareholder becomes aware of the occurrence of any event 
       or state of facts that results in any of the 
       representations and warranties of Seller Shareholder being 
       untrue or incorrect as if Seller Shareholder was then 
       making them. Seller Shareholder will not take any action, 
       or omit to take any action, and shall cause Company not to 
       take any action, or omit to take any action, that would 
       result in any of Seller Shareholder's representations and 
       warranties set forth in this Agreement to be untrue or 
       incorrect as of the Closing Date. Seller Shareholder will 
       use its best efforts to cause all conditions set forth in 
       Section 5 that are within its control to be satisfied as 
       promptly as practicable under the circumstances. 

                                5

4.4    HSR Act Notifications.  Buyer shall and Seller Shareholder 
       shall promptly take all steps necessary to file with the 
       Federal Trade Commission and U.S. Department of Justice 
       all pre-transaction notifications and related information 
       required pursuant to the provisions of the 
       Hart-Scott-Rodino Antitrust Improvements Act of 1976, as 
       amended (the "HSR Act") and to seek early termination of 
       the waiting period under the HSR Act. 

5.     CONDITIONS PRECEDENT TO BUYER'S OBLIGATIONS. Buyer's 
       obligation to consummate the transactions contemplated by 
       this Agreement is subject to the fulfillment (or waiver by 
       Buyer) before or at the Closing of each of the following 
       conditions: 

5.1    Accuracy of Representations and Warranties. The 
       representations and warranties of Seller Shareholder 
       contained in this Agreement and all related documents 
       shall be true and correct at and as of the Closing Date 
       as though such representations and warranties were made 
       on that date. 

5.2    Performance of Covenants. Seller Shareholder shall have in 
       all respects performed and complied with all covenants, 
       agreements, and conditions that this Agreement requires, 
       and with all other related documents to be performed or 
       complied with prior to or on the Closing Date. 

5.3    Schedules. Buyer shall be reasonably satisfied with the 
       form and substance of the schedules to this Agreement.  

5.4    No Casualty. Prior to the Closing Date, Company shall not 
       have incurred, or be threatened with, a material liability 
       or casualty that would materially impair the value of its 
       assets or of the Business. 

5.5    Opinion of Counsel. Buyer shall have received the 
       favorable opinion of counsel to Seller Shareholder dated 
       the Closing Date and in form and substance reasonably 
       satisfactory to Buyer. 

5.6    Non-Foreign Person. Seller Shareholder shall have 
       delivered to Buyer an affidavit stating, under penalty of 
       perjury, the Seller Shareholder's federal taxpayer 
       identification number and that it is not a foreign person, 
       pursuant to Section 1445(b)(2) of the Code. 







                                6

5.7    Share Certificates. Seller Shareholder shall have 
       delivered to Buyer certificates representing all of the 
       Purchased Shares registered in the name of the Seller 
       Shareholder (without any restrictive legend or together 
       with such instruments and items that shall permit, in the 
       reasonable opinion of Buyer's counsel, the sale and 
       transfer of such shares free, clear, and discharged of any 
       such legend). The certificates shall be duly endorsed in 
       blank or with accompanying stock powers or assignments 
       duly signed. 

5.8    Certificates Regarding Conditions Precedent. The Seller 
       Shareholder shall have delivered to Buyer a certificate of 
       the Seller Shareholder certifying that as of the Closing 
       Date all of the conditions set forth in Sections 5.1, 5.2, 
       5.4, 5.6, 5.9, and 5.11 have been complied with. 

5.9    No Litigation. No action, suit, proceeding, or 
       investigation shall have been instituted before any court 
       or governmental body, or instituted by any governmental 
       agency, to restrain or prevent the carrying out of the 
       transactions contemplated by this Agreement or that might 
       affect Buyer's right to own, operate, and control the 
       Purchased Shares or the Business after the Closing Date. 

5.10   Lien Search. Buyer shall have received UCC lien searches 
       in form and content satisfactory to Buyer. 

5.11   Consents. Seller Shareholder shall have obtained in 
       writing all consents necessary or desirable to consummate 
       or facilitate consummation of this Agreement and any 
       related transactions. The consents shall be delivered to 
       Buyer before Closing and shall be reasonably acceptable to 
       Buyer in form and substance. 

5.12   Waivers. Seller Shareholder shall have delivered to Buyer 
       a statement from the Seller Shareholder and each of 
       Company's officers and directors, in form and substance 
       acceptable to Buyer, that each either waives or has no 
       claim, as appropriate, against Company for unpaid 
       dividends, bonuses, profit sharing, rights, or other 
       claims of any kind, nature, or description except salaries 
       and fringe benefits normally accrued and described in the 
       statement or otherwise contemplated under this Agreement. 

5.13   Resignations. Except only as otherwise directed by Buyer, 
       each director and officer of Company shall have delivered 
       to Buyer resignations from their positions and any other 
       positions held in, or by appointment by or from, Company. 




                                7

5.14   HSR Notification.  All pre-transaction notifications 
       required of all parties pursuant to the provisions of the 
       HSR Act have been filed with the Federal Trade Commission 
       and U.S. Department of Justice, and the waiting period 
       under the HSR Act has expired or the Federal Trade 
       Commission and U.S. Department of Justice have granted 
       early termination thereof. 

5.15   Approvals by Buyer's Counsel. Buyer's counsel shall have 
       reasonably approved all legal matters and the form and 
       substance of all documents Buyer or Company or Seller 
       Shareholder is to deliver at the Closing. 

5.16   Intentionally Blank. 

5.17   Key Employees. Seller Shareholder shall use its best 
       reasonable efforts to encourage the marketing employees of 
       Company to accept employment with Buyer or Buyer's 
       designee.  

5.18   Lease Termination.  Company's lease of premises at 405 
       Water Street, Port Huron, Michigan, and of any other real 
       property, shall be assigned by Company to Seller 
       Shareholder at Closing but effective the Effective Date, 
       and Seller Shareholder shall assume and agree to perform, 
       and defend and hold the Company harmless from and against, 
       all liabilities and obligations thereunder. 

5.19   Benefit Plan Terminations. Seller Shareholder shall have 
       made arrangements, satisfactory to Buyer, such that all of 
       Company's ERISA and employee benefit plans, including, 
       without limitation, all Plans, Pension Plan and Trusts and 
       all Welfare Plans, as defined in Section 8.15, shall have 
       been made prospectively inapplicable to Company's 
       employees (i.e. no further benefits or liabilities will 
       accrue thereafter) without further liability or obligation 
       on the part of Company after the Effective Date. 

6.     CONDITIONS PRECEDENT TO SELLER SHAREHOLDER'S OBLIGATIONS. 
       Seller Shareholder's obligation to consummate the 
       transactions contemplated by this Agreement is subject to 
       the fulfillment (or waiver by Seller Shareholder) before 
       or at the Closing of each of the following conditions: 

6.1    Accuracy of Representations and Warranties. Buyer's 
       representations and warranties contained in this Agreement 
       and all related documents shall be true and correct at and 
       as of the Closing Date as though such representations and 
       warranties were made at that time. 




                                8

6.2    Performance of Covenants. Buyer shall have in all respects 
       performed and complied with all covenants, agreements, and 
       conditions required by this Agreement and all related 
       documents that must be performed or complied with before 
       and at the Closing Date. 

6.3    HSR Notification.  All pre-transaction notifications 
       required of all parties pursuant to the provisions of the 
       HSR Act have been filed with the Federal Trade Commission 
       and U.S. Department of Justice, and the waiting period 
       under the HSR Act has expired or the Federal Trade 
       Commission and U.S. Department of Justice have granted 
       early termination thereof. 

6.4    Board Approval.  Seller Shareholder's Board of Directors 
       shall have approved this Agreement and the transactions 
       contemplated hereunder. 

7.     CLOSING AND POST-CLOSING MATTERS. 

7.1    Closing and Effective Date. The closing of the 
       transactions contemplated in this Agreement (the 
       "Closing") shall take place at the offices of Buyer on 
       the third business day or sooner following the date the 
       waiting period under the HSR Act has expired or the 
       Federal Trade Commission and U.S. Department of Justice 
       have granted early termination thereof, provided all 
       other conditions precedent have been fulfilled or 
       waived (the "Closing Date").  However: (a) the Closing 
       shall be effective the Effective Date, and (b) if the 
       Closing has not taken place on or before June 1, 1999 
       (subject to extension of such date by written agreement 
       of Seller Shareholder and Buyer) due to failure or 
       inability to satisfy all conditions precedent, then 
       Seller Shareholder and Buyer shall each have the right 
       to terminate this Agreement by giving thirty (30) days' 
       prior written notice to the other, and this Agreement 
       shall terminate without further obligation on the part 
       of any party upon the expiration of such thirty (30) 
       day period unless all conditions precedent have been 
       fulfilled or waived prior to that date. 

7.2    Certain Closing Expenses. Seller Shareholder shall be 
       liable for and shall pay all federal, state, and local 
       sales, use, excise, transfer, and documentary stamp taxes 
       and all other taxes, duties, or other like charges, and 
       all recording and filing fees, properly payable on and in 
       connection with the conveyance and transfer of the 
       Purchased Shares to Buyer. 




                                9

7.3    Further Assurances. Seller Shareholder shall cooperate 
       with and assist Buyer and take all other reasonable 
       actions to ensure a smooth transition of the Company to 
       Buyer. From time to time after the Closing Date, Seller 
       Shareholder shall, at the request of Buyer, execute and 
       deliver additional conveyances, transfers, documents, 
       instruments, assignments, applications, certifications, 
       papers, and other assurances that Buyer reasonably 
       requests as necessary, appropriate, convenient, useful, or 
       desirable to effectively carry out this Agreement's intent 
       and to transfer the Purchased Shares to Buyer. 

7.4    Tax Sharing Agreements.  Seller Shareholder and Company 
       shall, as of the Effective Date, terminate any tax sharing 
       or allocation agreement as relates in any way to Company 
       so that such agreements are of no further force or effect 
       as to Company for any periods on or after the Effective 
       Date and so that there shall be no further liability of 
       Company under any such agreement. 

7.5    Following Closing. 

       A.     Buyer, Company, Seller Shareholder and the common 
              parent of the consolidated group which (prior to 
              the Effective Date) includes Company, shall all 
              take such actions, and file such forms, returns and 
              information (including, but without limitation, 
              Form 8023), at such time or times and in such 
              manner, as shall be necessary so that, as permitted 
              under Section 338(h)(10) of the Code, Company's 
              basis in its assets, following the Closing but 
              effective immediately following the Effective Date, 
              shall be stepped-up to include the Purchase Price, 
              as finally adjusted, and any deemed purchase price 
              relating to liabilities to which Company's assets 
              are subject at the Effective Date. Provided the 
              covenants in this Section 7.5A and in Section 7.5B 
              are satisfied by Seller Shareholder, by such common 
              parent and, to the extent of Seller Shareholder's 
              control, by Company, Seller Shareholder makes no 
              representation or warranty as to whether such 
              step-up in basis will be allowed. 

       B.     The consolidated group which (prior to the 
              Effective Date) includes Company shall file a 
              consolidated return for the taxable period that 
              includes the Effective Date, in which Company shall 
              recognize gain or loss as if, while it was a member 
              of such group, it sold all of its assets in a 
              single transaction at the close of the Effective 
              Date (but before its deemed liquidation) as 
              provided in Section 1.338(h)(10)-1(e) of the 
              Regulations under the Code. 

                                10

       C.     Any refund of income taxes with respect to Company 
              shall belong to the party responsible for payment 
              of the income taxes for the period for which the 
              tax refund in question is paid. 

       D.     Seller Shareholder and Buyer shall each provide the 
              other with such assistance as may reasonably be 
              requested in connection with the preparation of any 
              tax return, or any audit or other examination by 
              any taxing authority, or judicial or administrative 
              proceedings relating to tax liabilities, provided 
              the requesting party agrees to reimburse the 
              reasonable direct costs incurred by the responding 
              party in connection therewith. Seller Shareholder 
              and Buyer shall retain, and provide the other with 
              copies upon request of, any records or other 
              information which may be relevant to any such 
              return, audit or examination, proceeding or 
              determination. Seller Shareholder shall retain, 
              until expiration of the applicable statute of 
              limitations, including extensions, copies of all 
              returns, supporting work schedules and other 
              records and information which may be relevant to 
              such returns for all tax periods or portions 
              thereof ending on or before the Effective Date. 

8.     SELLER SHAREHOLDER'S REPRESENTATIONS AND WARRANTIES. As of 
       the date of this Agreement and as of the Closing, Seller 
       Shareholder represents and warrants to Buyer, and 
       acknowledges and confirms that Buyer is relying on these 
       representations and warranties in entering into this 
       Agreement: 

8.1    Organization and Standing. Company is a corporation duly 
       organized, validly existing, and in good standing under 
       the laws of the State of Michigan, and Company has all 
       requisite power and authority (corporate and otherwise) to 
       own its properties and conduct its business as it is now 
       being conducted. The nature of the business and the 
       character of the properties Company owns or leases do not 
       make licensing or qualification of Company as a foreign 
       corporation necessary under the laws of any other 
       jurisdiction. Except as set forth in Schedule 8.1, Company 
       has not in the last five years used or assumed any other 
       name in connection with the conduct of its business. 

8.2    Articles and Bylaws. Schedule 8.2 contains true and 
       complete copies of Company's Articles of Incorporation and 
       Bylaws. 




                               11

8.3    Capitalization. Company's authorized capital stock 
       consists solely of 100 shares of Company Common Stock, of 
       which 100 shares are issued and outstanding. All of the 
       issued and outstanding Company Common Stock is owned of 
       record and beneficially by the Seller Shareholder. A true 
       and complete list of the certificate numbers and number of 
       shares held by the Seller Shareholder is set forth in 
       Schedule 8.3. There are no options, calls, subscriptions, 
       warrants, agreements, or other securities or rights 
       outstanding for the purchase or other acquisition of any 
       of Company's capital stock; that are convertible into, 
       exercisable for, or relate to any of Company's capital 
       stock; or that have any voting rights. Company has no 
       outstanding contractual obligations to repurchase, 
       redeem, or otherwise acquire any outstanding shares of 
       Company's capital stock. 

8.4    Company Common Stock. Seller Shareholder is the lawful 
       owner of the Purchased Shares, free, clear, and discharged 
       of and from all pledges, liens, security interests, 
       encumbrances, mortgages, adverse claims, charges, options, 
       equity interests, proxies, voting agreements or trusts, 
       leases, tenancies, easements, or other interests 
       ("Encumbrances"). All shares of the Purchased Shares have 
       been duly authorized and validly issued and are fully 
       paid, nonassessable, and free of preemptive rights. On 
       delivery to Buyer at the Closing of the Purchased Shares, 
       duly endorsed for transfer, Buyer will be the absolute 
       owner of the Purchased Shares, free, clear, and discharged 
       of and from all Encumbrances. 

8.5    Authorization. Subject to approval  by Seller 
       Shareholder's Board of Directors, the Seller Shareholder 
       has the requisite legal capacity to execute, deliver, and 
       perform this Agreement and to consummate any related 
       transactions. The Seller Shareholder has duly executed and 
       delivered this Agreement. This Agreement is the legal, 
       valid, and binding obligation of the Seller Shareholder, 
       enforceable against it in accordance with its terms, 
       except as such enforcement may be limited by 
       bankruptcy, insolvency, moratorium, or similar laws 
       relating to the enforcement of creditors' rights and by 
       general principles of equity (regardless of whether such 
       enforceability is considered in a proceeding at law or in 
       equity). 








                               12

8.6    Existing Agreements and Governmental Approvals. 

       (a)    Except as set forth in Schedule 8.6, the execution, 
              delivery, and performance of this Agreement and the 
              consummation of the transactions contemplated 
              hereby (i) do not and will not violate any 
              provisions of law applicable to Company or the 
              Seller Shareholder; (ii) do not and will not 
              conflict with, result in the breach or termination 
              of any provision of, or constitute a default under 
              (in each case whether with or without the giving of 
              notice or the lapse of time, or both) Company's 
              Articles of Incorporation or Bylaws or any 
              indenture, mortgage, lease, deed of trust; other 
              instrument, contract, or agreement; or any order, 
              judgment, arbitration award, or decree to which 
              Company or Seller Shareholder is a party or by 
              which either of them or any of their respective 
              assets and properties are bound; and (iii) do not 
              and will not result in the creation of any 
              Encumbrance on any of the properties, assets, or 
              business of Company or Seller Shareholder. 

       (b)    Except as set forth in Schedule 8.6 and except for 
              compliance with the HSR Act, no approval, 
              authority, or consent of or filing by Company or 
              Seller Shareholder with, or notification to, any 
              federal, state, or local court, authority, or 
              governmental or regulatory body or agency, or any 
              other corporation, partnership, individual, or 
              other entity is necessary to authorize the 
              execution and delivery of this Agreement or the 
              consummation of the transactions contemplated 
              hereby. 

8.7    No Subsidiaries or Guaranties. Company does not have any 
       subsidiaries or directly or indirectly own any interest or 
       have any investment in any other corporation, partnership, 
       or other entity. Company is not a guarantor, or otherwise 
       liable for the payment, of any obligations of any other 
       person or entity. 












                                13

8.8    No Insolvency. No insolvency proceeding of any character, 
       including, without limitation, bankruptcy, receivership, 
       reorganization, composition, or arrangement with 
       creditors, voluntary or involuntary, affecting Company or 
       any of its assets or properties is pending or, to the Best 
       Knowledge of Seller Shareholder, threatened. Neither 
       Company nor Seller Shareholder has taken any action in 
       contemplation of, or that would constitute the basis for, 
       the institution of any such insolvency proceedings. For 
       the purposes of this Agreement, the phrase "Best Knowledge 
       of Company" or "Best Knowledge of Seller Shareholder," or 
       words of similar import, means the knowledge the Company 
       or the Seller Shareholder, as applicable, would have after 
       due inquiry into the matter in question. 

8.9    Permits and Licenses. Company has all necessary permits, 
       certificates, licenses, approvals, consents, and other 
       authorizations required to carry on and conduct the 
       Business and to own, lease, use, and operate its assets at 
       the places and in the manner in which the Business is 
       conducted. A complete list of Company's permits, 
       certificates, licenses, approvals, consents, and other 
       authorizations is included in Schedule 8.9. 

8.10   Financial Statements. Seller Shareholder has delivered to 
       Buyer the financial statements listed in Schedule 8.10, 
       and Seller Shareholder shall deliver, before the Closing, 
       copies of all financial statements Company has prepared 
       for each full month prior to the Closing (the "Financial 
       Statements"). The Financial Statements have been and will 
       be prepared in accordance with GAAP, do and will fairly 
       and accurately present the financial position of Company 
       as of the dates indicated and the results of its 
       operations as of the dates indicated and for the periods 
       covered thereby, and are and will be true and correct in 
       all material respects. Adequate provision has been and 
       will be timely made in the Financial Statements for 
       doubtful accounts or other receivables; sales are stated 
       in the Financial Statements net of discounts, returns, and 
       allowances; all Taxes (as defined in Section 8.22) due or 
       paid are and will be timely reflected in the Financial 
       Statements; and all Taxes not yet due and payable are and 
       will be fully accrued or otherwise provided for in the 
       Financial Statements. Any items of income or expense that 
       are unusual or of a nonrecurring nature during any such 
       period or at any such balance sheet date are and will be 
       separately disclosed in the Financial Statements. Except 
       as otherwise disclosed on Schedule 8.10, Company's books, 
       records, and work papers are complete and correct; have 
       been maintained on an accrual basis, in accordance with 
       GAAP; and accurately reflect, and will accurately reflect, 
       the basis for the financial condition and the results of 
       Company's operations that are set forth in the Financial 
       Statements and are to be set forth in the Preliminary 
       Balance Sheet and the Closing Balance Sheet. 

                               14

8.11   No Undisclosed Liabilities, and No Long Term Debt. Except 
       as otherwise disclosed on Schedule 8.11, in the Financial 
       Statements or otherwise in this Agreement, Company does 
       not have any liabilities or obligations, whether accrued, 
       absolute, contingent, or otherwise.  As of the date of 
       this Agreement and as of the Closing Date, Company has no 
       long term debt. 

8.12   Conduct of Business. Except as otherwise disclosed on 
       attached Schedule 8.12, since December 31, 1998, Company 
       has not: 

       (a)    Issued any capital stock or other securities 
              convertible into or exchangeable or exercisable for 
              capital stock or having voting rights; declared or 
              paid any dividend; made any other payment from 
              capital or surplus or other distribution of any 
              nature; or directly or indirectly redeemed, 
              purchased, or otherwise acquired, recapitalized, or 
              reclassified any of its capital stock. 

       (b)    Merged or consolidated with any other entity. 

       (c)    Altered or amended its Articles of Incorporation or 
              Bylaws. 

       (d)    Entered into, materially amended, or terminated any 
              contract, license, lease, commitment or permit, 
              except in the ordinary course of business 
              consistent with past practices. 

       (e)    Experienced any labor disturbance. 

       (f)    Incurred or become subject to any obligation or 
              liability (absolute, accrued, contingent, or 
              otherwise), except in the ordinary course of 
              business consistent with past practices. 

       (g)    Discharged or satisfied any Encumbrance or paid or 
              satisfied any obligation or liability (absolute, 
              accrued, contingent, or otherwise) other than (i) 
              liabilities shown or reflected in Company's balance 
              sheet dated December 31, 1998 or (ii) liabilities 
              incurred since the date of the balance sheet, in 
              each such case only in the ordinary course of 
              business consistent with past practices and in 
              accordance with the express terms of such 
              obligation or liability. 

       (h)    Mortgaged, pledged, or subjected to any Encumbrance 
              any of its assets. 


                               15

       (i)    Sold, transferred, or agreed to sell or transfer 
              any asset, property, or business; canceled or 
              agreed to cancel any debt or claim; or waived any 
              right, except in the ordinary course of business 
              consistent with past practices. 

       (j)    Disposed of or permitted to lapse any Intellectual 
              Property. 

       (k)    Granted any increase in employee rates of pay or 
              any increases in salary payable or to become 
              payable to any employee, consultant, or agent, or 
              by means of any bonus or pension plan, contract, or 
              other commitment increased the compensation of any 
              employee, consultant, or agent, or hired any new 
              officer, employee, consultant, or agent, other than 
              consistent with past practices (all of which are 
              disclosed on Schedule 8.12). 

       (l)    Made or authorized any capital expenditures for 
              additions to plant or equipment accounts in excess 
              of $10,000.00. 

       (m)    Entered into any transaction (including, without 
              limitation, any contract or other arrangement 
              providing for employment, furnishing of services, 
              rental of real or personal property, or otherwise 
              requiring payments) with any shareholder, officer, 
              or director of Company or of Seller Shareholder; 
              any member of their immediate families; or any of 
              their affiliates. 

       (n)    Experienced any material damage, destruction, or 
              loss (whether or not covered by insurance) 
              affecting its properties, assets, or Business. 

       (o)    Failed to regularly maintain and repair its assets 
              in the ordinary course of business consistent with 
              past practices. 

       (p)    Instituted or settled any litigation, action, or 
              proceeding before any court or governmental body 
              relating to it or its property, except for the 
              litigation instituted against Wickford as described 
              in Section 8.23. 

       (q)    Made any change in any method of accounting or any 
              accounting practice or suffered any deterioration 
              in accounting controls. 

       (r)    Varied, canceled, or allowed to expire any 
              insurance coverage. 

                               16

       (s)    Made any payment or disbursement of moneys or 
              property or declared or paid any dividend or other 
              distribution to or on behalf of any officer, 
              director, or shareholder of Company or of Seller 
              Shareholder or any member of their immediate 
              families or any of their affiliates, other than for 
              payment of compensation or reimbursement of 
              expenses in accordance with past practices. 

       (t)    Entered into any other transaction other than in 
              the ordinary course of business consistent with 
              past practices. 

       (u)    Agreed or committed to do any of the foregoing. 

8.13   No Adverse Changes. Except as otherwise disclosed in 
       Schedule 8.13, since December 31, 1998 there has not been 
       any occurrence, condition, or development that has 
       materially adversely affected, or is likely to 
       materially adversely affect, Company, its prospects, 
       its condition (financial or otherwise), its affairs, 
       its operations, the Business, or its assets. 

8.14   Employees. There is not now, nor has there been at any 
       time during the past five years, any strike, lockout, 
       grievance, other labor dispute, or trouble of any nature 
       pending or threatened against Company or that in any 
       manner affects Company. Company is and has been in 
       compliance with all rules regulating employee wages and 
       hours. On or before the Closing Date, Company shall have 
       paid all its accrued obligations relating to employees 
       (whether arising by operation of law, by contract, or by 
       past service) or payments to trusts or other funds, to any 
       governmental agency, or to any individual employee (or his 
       or her legal representatives) with respect to unemployment 
       compensation benefits, profit sharing, or retirement 
       benefits, or Social Security benefits. 

8.15   Employee Benefit Plans and Related Matters. 

       (a)    Schedule 8.15 contains a true and complete list of 
              all plans, contracts, programs, and arrangements 
              (including, but not limited to, collective 
              bargaining agreements, pensions, bonuses, deferred 
              compensation, retirement, severance, 
              hospitalization, insurance, salary continuation, 
              and other employee benefit plans, programs, or 
              arrangements) maintained currently or at any time 
              within the previous five years by Company or under 
              which Company has had any obligations with respect 
              to an employee of Company (the "Plans"). 


                               17

       (b)    Except as specifically set forth in Schedule 8.15, 
              (i) each employee pension benefit plan, as defined 
              in Section 3(2) of ERISA, and its related trust 
              ("Pension Plan and Trust") now meet, and since 
              their inception have met, the requirements for 
              qualification under Sections 401(a) and 401(k) of 
              the Internal Revenue Code of 1986, as amended (the 
              "Code"), and are now, and since their inception 
              have been, exempt from taxation under Section 
              501(a) of the Code, and the Internal Revenue 
              Service ("IRS") has issued a favorable 
              determination letter with respect to the qualified 
              status of each Pension Plan and Trust and has not 
              taken any action to revoke such letter; (ii) 
              Company has performed all obligations required to 
              be performed by it under the Plans (including, but 
              not limited to, the making of all contributions) 
              and is not in default under and has no knowledge of 
              any default by any other party to the Plans; (iii) 
              Company is in compliance with the requirements of 
              all statutes, orders, and governmental rules and 
              regulations applicable to such Plans, including, 
              but not limited to, ERISA and the Code; (iv) 
              neither Company nor, to the Best Knowledge of 
              Seller Shareholder, any other disqualified person 
              or party in interest, within the meaning of Section 
              4975 of the Code or Section 3(14) of ERISA, has 
              engaged in any prohibited transaction, as this term 
              is defined in Section 4975 of the Code or Section 
              406 of ERISA, that could, following the Closing 
              Date, subject any Plan (or its related trust), 
              Buyer, Company, or any officer, director, or 
              employee of Buyer or Company, to any tax or penalty 
              imposed under the Code or ERISA; (v) there are no 
              actions or claims pending (other than routine 
              claims for benefits) or, to the Best Knowledge of 
              Company or Seller Shareholder, threatened against 
              any Plan or against the assets of any Plan; (vi) no 
              Plan is subject to Part 3 of Title I of ERISA, 
              Section 412 of the Code, or Title IV of ERISA, 
              other than the existing Non-Union Employees' 
              Retirement Plan; (vii) each Plan's plan official, 
              as defined in Section 412 of ERISA, is bonded to 
              the extent required by Section 412; (viii) no 
              proceeding has been initiated to terminate any 
              Plan, and any such termination will not subject 
              Company or Buyer to liability to any person; (ix) 
              no Plan is a multiemployer plan, as defined in 
              Section 3(37) of ERISA; (x) no retiree benefits are 
              payable under any employee welfare benefit plan 
              ("Welfare Plan"), as this term is defined in 
              Section 3(1) of ERISA, other than the existing 

                               18

              Employee Benefit Plan; and (xi) each Welfare Plan 
              that is a group health plan within the meaning of 
              Section 5000 of the Code complies with and in each 
              case has complied with the applicable requirements 
              of Sections 601 through 608 of ERISA, Section 
              162(k) of the Code (through December 31, 1988), and 
              Section 4980B of the Code (commencing January 1, 
              1989). 

       (c)    Each of the following is included in the list of 
              agreements in Schedule 8.15: all collective 
              bargaining agreements, employment and consulting 
              agreements, executive compensation plans, bonus 
              plans, deferred compensation plans, employee 
              pension or retirement plans, employee 
              profit-sharing plans, employee stock purchase and 
              stock option plans, hospitalization insurance, and 
              other plans and arrangements providing for employee 
              benefits to Company's employees. 

       (d)    No retired employees of Company are receiving or 
              are entitled to receive any payments or health or 
              other benefits from Company, except such benefits 
              as are being received or are entitled to be 
              received from Seller Shareholder. 

8.16   Employee Matters. Schedule 8.16 contains a true and 
       complete list of the following: the names, positions, and 
       compensation of the present employees of the Company. 
       Except as listed in Schedule 8.16, all Company's employees 
       are employees-at-will, may be terminated at any time in 
       accordance with the written policies (copies of which are 
       contained in Schedule 8.16) of Company for any lawful 
       reason or for no reason, and are not entitled to 
       employment by virtue of any oral or written contract, 
       employer policy, or otherwise.  As of the Closing, the 
       Company will have no employees. 

8.17   Contracts and Commitments. 

       (a)    Schedule 8.17 contains a true and complete list of 
              all of Company's written, and a description of all 
              material terms of Company's unwritten, contracts, 
              obligations, agreements, plans, arrangements, and 
              commitments of any kind or nature (the "Contracts 
              and Commitments"), except for 

              (i)    those contracts that are described in 
                     another Schedule; 




                               19

              (ii)   each purchase contract with a customer made 
                     in the ordinary course of business 
                     consistent with past practices under which 
                     Company is obligated to deliver less than 
                     $10,000.00 in invoice value of product and 
                     services in each transaction or series of 
                     related transactions; and 

              (iii)  each purchase commitment made in the 
                     ordinary course of business at prevailing 
                     prices, consistent with past practices, that 
                     is not in excess of $10,000.00 in each 
                     transaction or series of related 
                     transactions. 

              All Contracts and Commitments are in full force and 
              effect without amendment (unless the amendments are 
              clearly noted), and Company is and shall be 
              entitled to all benefits from any contracts. 

       (b)    True and complete copies of all Contracts and 
              Commitments have been delivered to Buyer. All 
              Contracts and Commitments are the result of bona 
              fide, arm's-length transactions and are legal, 
              valid, and binding obligations of the parties to 
              them enforceable in accordance with their 
              respective terms, subject to laws generally 
              governing bankruptcy and the enforcement of 
              creditor's rights. 

       (c)    Except as set forth in attached Schedule 8.17, no 
              default or alleged default exists on the part of 
              Company nor, to the Best Knowledge of Seller 
              Shareholder, on the part of any other person, under 
              any Contract or Commitment. 

8.18   Title to Assets. Company is the sole and absolute owner of 
       all the assets reflected in Company's Balance Sheet dated 
       December 31, 1998 and to be reflected in the Preliminary 
       Balance Sheet and the Closing Balance Sheet and has good 
       and marketable title to all such assets, free and clear of 
       any and all Encumbrances. Schedule 8.18 lists or describes 
       all property used in the conduct of the Business and/or 
       situated on the Premises that is owned by or an interest 
       in which is claimed by any person (whether a customer, 
       supplier, or other person) for which Company is 
       responsible, together with copies of all related 
       agreements. All such property is situated on the Premises 
       and is in such condition that, upon return to its owner, 
       Buyer will not be liable in any amount to the owner. 



                               20

8.19   Condition of Assets. All items of personal property 
       reflected in Company's Balance Sheet dated December 31, 
       1998, and to be reflected in the Preliminary Balance Sheet 
       and the Closing Balance Sheet, are and will be in good 
       working order and repair. Each item is situated at the 
       Premises and is fit for its intended purpose, with no 
       material defects. 

8.20   Receivables. The accounts and other receivables reflected 
       in Company's Balance Sheet dated December 31, 1998, and to 
       be reflected on the Preliminary Balance Sheet and Closing 
       Balance Sheet, are and will be the result of bona fide 
       sales or other transactions. Except to the extent that a 
       reserve against the possible uncollectibility of such 
       accounts and other receivables has been established and is 
       reflected on Company's Balance Sheet dated December 31, 
       1998, and will be established and reflected on the 
       Preliminary Balance Sheet and the Closing Balance Sheet, 
       all of the accounts and other receivables are fully 
       collectible within 180 days of the balance sheet date in 
       accordance with Company's ordinary practice (which has 
       been disclosed to Buyer) and without resort to legal 
       proceedings. 

8.21   Sufficiency of Assets. The assets reflected in Company's 
       Balance Sheet dated December 31, 1998, and to be reflected 
       in the Preliminary Balance Sheet and the Closing Balance 
       Sheet, constitute and will constitute all of the property 
       and assets, real, personal, and mixed, tangible and 
       intangible (including, without limitation, contract 
       rights), that are used or useful in, or are necessary for 
       the conduct of, the Company's Business in accordance with 
       present practices, except such as are provided by Seller 
       Shareholder and its affiliates. 

8.22   Taxes. 

       (a)    For the purposes of this Agreement, Tax or Taxes 
              shall mean all federal, state, county, local, and 
              other taxes (including, without limitation, income 
              taxes; premium taxes; single-business taxes; excise 
              taxes; sales taxes; use taxes; value-added taxes; 
              gross receipts taxes; franchise taxes; ad valorem 
              taxes; real estate taxes; severance taxes; capital 
              levy taxes; transfer taxes; stamp taxes; 
              employment, unemployment, and payroll-related 
              taxes; withholding taxes; and governmental charges 
              and assessments), and include interest, additions 
              to tax, and any penalties. 




                               21

       (b)    Except as otherwise disclosed on Schedule 8.22, 
              Company has filed on a timely basis all Tax returns 
              it is required to file under any federal, state, or 
              local law and has paid or established an adequate 
              reserve with respect to all Taxes for the periods 
              covered by such returns. No agreements have been 
              made by or on behalf of Company for any waiver or 
              for the extension of any statute of limitations 
              governing the time of assessment or collection of 
              any Taxes. Company and its officers have received 
              no notice of any pending or threatened audit by the 
              IRS, or any state or local agency, related to 
              Company's Tax returns or Tax liability for any 
              period, and no claim for assessment or collection 
              of Taxes has been asserted against Company. There 
              are no federal, state, or local tax liens 
              outstanding against any of Company's assets, 
              properties, or business. 

8.23   Litigation. There are no claims, disputes, actions, suits, 
       proceedings, or investigations pending or, to the Best 
       Knowledge of the Seller Shareholder, threatened against or 
       affecting Company, its business, or its assets, except for 
       the litigation instituted by the Company on February 9, 
       1999 described as SEMCO Energy Services, Inc. v. Black 
       Hills Energy Resources, Inc., et al. (the "Wickford 
       Litigation"). Seller Shareholder shall assume, and defend 
       and hold the Company harmless from and against, all 
       liabilities and obligations arising out of, related to or 
       connected with the Wickford Litigation. The obligations of 
       Seller Shareholder related to the Wickford Litigation 
       shall not be subject to Section 10.3 hereof. Buyer agrees 
       to cause the Company to pay over to Seller Shareholder any 
       cash recovery the Company actually receives in the 
       Wickford Litigation. 

8.24   Product Liability. No defect or deficiency exists in any 
       of the products sold or services provided by Company that 
       could give rise to any liabilities or claims for breach of 
       warranty, product liability, or similar liabilities or 
       claims, except to the extent fully insured against 
       (including all related costs of defense). 

8.25   Environmental Matters. 

       (a)    The following terms used in this Section 8.25 have 
              the meanings set forth below: 






                               22

              (i)    Environmental Laws means the (A) Toxic 
                     Substances Control Act, 15 USC 2601 et seq.; 
                     (B) National Historic Preservation Act, 16 
                     USC 470 et seq.; (C) Coastal Zone Management 
                     Act of 1972, 16 USC 1451 et seq.; (D) Rivers 
                     and Harbors Appropriation Act of 1899, 33 
                     USC 401 et seq.; (E) Clean Water Act, 33 USC 
                     1251 et seq.; (F) Flood Disaster Protection 
                     Act of 1973, 42 USC 4001 et seq.; (G) 
                     National Environmental Policy Act of 1969, 
                     42 USC 4321 et seq.; (H) Resource 
                     Conservation and Recovery Act of 1976 
                     (RCRA), 42 USC 6901 et seq.; (I) Clean Air 
                     Act, 42 USC 7401 et seq.; (J) Comprehensive 
                     Environmental Response, Compensation, and 
                     Liability Act (CERCLA), 42 USC 9601 et seq.; 
                     (K) Hazardous Materials Transportation Act, 
                     49 USC 1801 et seq.; (L) Safe Drinking Water 
                     Act, 42 USC 300f et seq.; (M) Emergency 
                     Planning and Community Right-to-Know Act of 
                     1986, 42 USC 11001 et seq.; (N) Federal 
                     Insecticide, Fungicide, and Rodenticide Act, 
                     7 USC 136 et seq.; (O) Occupational Safety 
                     and Health Act, 29 USC 651 et seq.; and all 
                     other federal, state, county, municipal and 
                     local, foreign, and other statutes, laws, 
                     regulations, and ordinances that relate to 
                     or deal with protection of human health or 
                     the environment, all as may be amended from 
                     time to time. 

              (ii)   Hazardous Substance(s) means (A) any 
                     flammable or combustible substance, 
                     explosive, radioactive material, hazardous 
                     waste, toxic substance, pollutant, 
                     contaminant, or any related materials or 
                     substances identified in or regulated by any 
                     of the Environmental Laws; and (B) asbestos, 
                     polychlorinated biphenyls (PCBs), urea 
                     formaldehyde, chemicals and chemical wastes, 
                     explosives, known carcinogens, petroleum 
                     products and by-products (including 
                     fractions thereof), and radon. 

              (iii)  Property means any parcel of real estate now 
                     or previously owned, leased, or operated by 
                     Company or in which Company has or had any 
                     interest, including the Premises. 





                               23

       (b)    Except as described in Schedule 8.25: (i) Company 
              is now and has at all times been in full compliance 
              with all Environmental Laws; (ii) there are no 
              substances or conditions in or on the Property that 
              may support a claim or cause of action against 
              Company or Buyer under any Environmental Laws; 
              (iii) there are not, and never have been, any 
              underground storage tanks located in or under the 
              Property; (iv) neither Company nor its directors, 
              officers, employees, or agents have generated or 
              transported any Hazardous Substances at any time 
              that have been transported to or disposed of in any 
              landfill or other facility, where the 
              transportation or disposal could create liability 
              to any unit of government or any third party. 

       (c)    No activity has been undertaken on the Property 
              that would cause or contribute to (i) the Property 
              becoming a treatment, storage or disposal facility 
              within the meaning of any Environmental Laws; (ii) 
              a release or threatened release of any Hazardous 
              Substances; or (iii) the discharge of pollutants or 
              effluents into any water source or system or into 
              the air, or the dredging or filling of any waters, 
              where such action would require a permit under any 
              Environmental Laws. Company has obtained all 
              permits required by all applicable Environmental 
              Laws, and all such permits are in full force and 
              effect. 

       (d)    Seller Shareholder has disclosed and delivered to 
              Buyer all environmental reports and investigations 
              that Company or Seller Shareholder has ever 
              obtained or ordered with respect to the Property. 

8.26   Compliance with Laws. At all times prior to the Closing 
       Date, Company has complied with all laws, orders, 
       regulations, rules, decrees, and ordinances affecting to 
       any extent or in any manner any aspects of the Business or 
       its assets. 

8.27   Suppliers and Customers. 

       (a)    A complete and accurate list of all suppliers or 
              vendors of products or services to Company in 
              connection with the Business (other than legal or 
              accounting services) aggregating more than 
              $10,000.00 (at cost) annually during Company's last 
              fiscal year, and the address of each supplier or 
              vendor and the amount sold to Company during that 
              period, is set forth in Schedule 8.27. The names of 
              any suppliers of goods or services with respect to 
              which practical alternative sources of supply are 
              not available on comparable terms and conditions 
              are separately listed in Schedule 8.27. 

                               24

       (b)    A complete and accurate list of each of Company's 
              customers aggregating more than $10,000.00 in 
              revenues to Company annually during the last fiscal 
              year in connection with the Business, the address of 
              each customer, and the amount each customer 
              purchased from Company during the last fiscal year 
              is set forth in Schedule 8.27. 

       (c)    Seller Shareholder has no information that might 
              reasonably indicate that any customer or supplier 
              of Company intends to cease purchasing from, 
              selling to, or dealing with Company. No information 
              has been brought to the attention of Seller 
              Shareholder that might reasonably lead it to 
              believe that any customer or supplier intends to 
              alter, in any material respect, the amount of its 
              purchases or sales or the extent of its dealings 
              with Company, or would alter in any material 
              respect its purchases from, sales to, or dealings 
              with Company, in the event the transactions 
              contemplated by this Agreement are consummated. 

8.28   No Brokers. Neither Company nor Seller Shareholder has 
       engaged, or is responsible for any payment to, any finder, 
       broker, or consultant in connection with the transactions 
       contemplated by this Agreement. 

8.29   Insider Transactions. A complete and accurate list and a 
       brief description of all contracts or other transactions 
       involving Company in which any officer, director, 
       employee, or shareholder of Company or Seller Shareholder; 
       any member of their immediate families; or any affiliate 
       has any interest is set forth in Schedule 8.29. 

8.30   Bank Accounts. Attached Schedule 8.30 contains a true and 
       complete list of the names and locations of all banks or 
       other financial institutions that are depositories for 
       funds of Company, the names of all persons authorized to 
       draw or sign checks or drafts on the accounts, the number 
       of the accounts, and the names and locations of any 
       institutions in which Company has any safe-deposit boxes 
       and the names of the individuals having access to them. 
       Company does not have any outstanding powers of attorney. 










                               25

8.31   Intellectual Property. Schedule 8.31 lists or briefly 
       describes all of Company's material intellectual property 
       (including, without limitation, know-how, trade secrets, 
       confidential and proprietary processes, and technology, 
       whether or not patentable) that Company directly or 
       indirectly owns, licenses, uses, requires for use or 
       controls in whole or in part ("Intellectual Property") and 
       all licenses and other agreements allowing the Company to 
       use the intellectual property of third parties. Except as 
       set forth in Schedule 8.31, Company is the sole and 
       exclusive owner of the Intellectual Property, free and 
       clear of all Encumbrances. None of the Company's 
       Intellectual Property infringes on any other person's 
       intellectual property, and, to the Best Knowledge of the 
       Seller Shareholder, no activity of any other person 
       infringes on any of the Intellectual Property. Company has 
       been and is now conducting the Business in a manner that 
       has not been and is not now in violation of any other 
       person's intellectual property, and except for Company's 
       blanket certificate, Company does not require a license or 
       other proprietary right to so operate the Business. 

8.32   Insurance. All insurance policies covering Company's real 
       and personal property or providing for business 
       interruption, personal and product liability coverage, and 
       other insurance are described in Schedule 8.32 (which 
       specifies the insurer, policy number, type of insurance, 
       and any pending claims). Such insurance is in amounts 
       Company deems sufficient with respect to its assets, 
       properties, business, operations, products, and services 
       as the same are presently owned or conducted, and all such 
       policies are in full force and effect and the premiums 
       have been paid. There are no claims, actions, suits, or 
       proceedings arising out of or based on any of these 
       insurance policies, and no basis for any such claim, 
       action, suit, or proceeding exists. Company is not in 
       default with respect to any provisions contained in any 
       such insurance policies and has not failed to give any 
       notice or present any claim under any such insurance 
       policy in due and timely fashion. 

       Buyer acknowledges and agrees that (a) all such insurance 
       policies will cease to be of any further force or effect 
       with respect to the Company for all periods after the 
       Closing Date, and (b) Buyer shall cause desired insurance 
       coverages with respect to the Company to be in place and 
       effective as of the close of business on the Closing Date. 

8.33   Materiality. No statement in this Agreement or in any 
       certificate delivered to Buyer pursuant to this Agreement 
       contains or will contain any untrue statement of a 
       material fact, or fails or will fail to contain any 
       material fact necessary to make the statements not 
       misleading. 

                               26

9.     BUYER'S REPRESENTATIONS AND WARRANTIES. Buyer represents 
       and warrants to Seller Shareholder that: 

9.1    Organization and Standing. Buyer is a corporation duly 
       organized and validly existing under the laws of the State 
       of Michigan, and Buyer has all the requisite power and 
       authority  corporate and otherwise) to own its properties 
       and to conduct its business as it is now being conducted. 

9.2    Authorization. Buyer has taken all necessary action (a) to 
       duly approve the execution, delivery, and performance of 
       this Agreement, and (b) to consummate the transactions 
       contemplated under this Agreement. Buyer has duly executed 
       and delivered this Agreement. This Agreement is the legal, 
       valid, and binding obligation of Buyer, enforceable 
       against Buyer in accordance with its terms, except as such 
       enforcement may be limited by bankruptcy, insolvency, 
       moratorium, or similar laws relating to the enforcement of 
       creditor's rights and by general principles of equity 
       (regardless of whether such enforceability is 
       considered in a proceeding at law or in equity). 

9.3    Existing Agreements and Governmental Approvals. 

       (a)    Except as set forth on Schedule 9.3, the execution, 
              delivery, and performance of this Agreement and the 
              consummation of the transactions contemplated by it 
              (i) do not and will not violate any provisions of 
              law applicable to Buyer; (ii) do not and will not 
              conflict with, result in the breach or termination 
              of any provision of, or constitute a default under 
              (in each case whether with or without the giving of 
              notice or the lapse of time, or both) Buyer's 
              Articles of Incorporation or Bylaws or any 
              indenture, mortgage, lease, deed of trust, or other 
              instrument, contract, or agreement or any order, 
              judgment, arbitration award, or decree to which 
              Buyer is a party or by which it or any of its 
              assets and properties are bound; and (iii) do not 
              and will not result in the creation of any 
              Encumbrance on any of the Buyer's properties, 
              assets, or business. 

       (b)    Except as set forth on Schedule 9.3 and except for 
              compliance with the HSR Act, no approval, 
              authority, or consent of, or filing by Buyer with, 
              or notification to, any federal, state, or local 
              court, authority, or governmental or regulatory 
              body or agency or any other corporation, 
              partnership, individual, or other entity is 
              necessary to authorize Buyer's execution and 
              delivery of this Agreement or the consummation of 
              the transactions contemplated by this Agreement. 

                               27

9.4    Investment Intent. Buyer is acquiring the Purchased Shares 
       for its own account, for investment, and without any 
       present intention to resell the Purchased Shares. Buyer 
       acknowledges and agrees that the Purchased Shares have not 
       and will not be registered under the Securities Act of 
       1933 or the Michigan Uniform Securities Act, and Buyer 
       will not resell the Purchased Shares unless they are so 
       registered or unless an exemption from registration is 
       available. Buyer consents to the imposition of a legend to 
       this effect on the certificates for the Purchased Shares 
       and to a notation to this effect in the appropriate 
       records of Company. 

10.    SURVIVAL, INDEMNIFICATION AND CLAIMS PROCEDURE. 

10.1   Survival.  All representations, warranties and covenants 
       made in this Agreement shall survive, and shall not be 
       extinguished by, the Closing.  All such representations 
       and warranties and all claims and causes of action with 
       respect thereto (other than representations and warranties 
       set forth in Sections 8.3, 8.4, 8.15, 8.22 and 8.25, 
       claims and causes of action with respect thereto, and 
       claims and causes of action with respect to knowing 
       breaches or violations of representations and warranties) 
       shall terminate upon expiration of one (1) year following 
       the Closing Date; provided such termination shall not 
       affect the rights of any party in respect of any such 
       claim or cause of action as to which Indemnification 
       Notice has been given prior to the expiration of such 
       one (1) year period.  The representations and 
       warranties set forth in Sections 8.3, 8.4, 8.15, 8.22 
       and 8.25, claims and causes of action with respect 
       thereto, and claims and causes of action with respect 
       to knowing breaches or violations of representations and 
       warranties, shall survive for the applicable statute of 
       limitations. 

10.2   Indemnification. Subject to the limitations set forth in 
       Section 10.1, Seller Shareholder shall defend, indemnify, 
       and hold harmless Buyer, Company, and their respective 
       directors, officers, shareholders, partners, members, 
       successors, and assigns (for the purposes of this Section 
       10 sometimes collectively called "Indemnified Parties", 
       and each an "Indemnified Party") from and against any and 
       all costs, losses, claims, suits, actions, assessments, 
       liabilities (to the extent not offset with a corresponding 
       asset), fines, expenses, penalties, judgments and damages, 
       including, without limitation, court and appeal costs and 
       reasonable legal fees (sometimes collectively "Loss") 
       arising or resulting from, related to or connected 
       with: 


                               28

       (a)    Any falsity or inaccuracy in, or breach of, any 
              representation or warranty of the Seller 
              Shareholder contained in this Agreement; 

       (b)    Any failure of Seller Shareholder to perform or 
              observe in full, or to have performed or observed 
              in full, any covenant, agreement, or condition to 
              be performed or observed by the Seller Shareholder 
              or (on or before Closing Date) by Company under 
              this Agreement; 

       (c)    Taxes of Company for any period ending on or prior 
              to the Effective Date, including, but without 
              limitation, Taxes resulting from Company's 
              recognition of gain as a result of the transactions 
              described in this Agreement; and 

       (d)    Any liability or obligation of Company accruing or 
              existing on or prior to the Effective Date, known 
              or unknown, whether based upon contract, tort, 
              strict liability or otherwise, except for: (i) 
              current liabilities of Company which are fully 
              reflected or reserved against in the Preliminary 
              Balance Sheet or Final Balance Sheet as provided in 
              Section 2.3 or as otherwise disclosed in this 
              Agreement, and (ii) contract obligations of Company 
              which, in accordance with the terms of the 
              contracts, are to be performed after the Effective 
              Date; 

       herein sometimes collectively called "Indemnified Claims" 
       and each an "Indemnified Claim". 

10.3   Limitations. Notwithstanding the provisions of Section 
       10.2: (a) the Indemnified Parties shall have no right to 
       make a claim thereunder except for the amount by which the 
       aggregate of all claims thereunder which have not 
       theretofore been reimbursed to the Indemnified Parties and 
       which the Indemnified Parties would be entitled to assert 
       against Seller Shareholder absent this Section 10.3, 
       exceed One Hundred Thousand ($100,000.00) Dollars, and (b)  
       the liabilities and obligations of the Seller Shareholder 
       under this Section 10 shall be limited, in the aggregate, 
       to the amount of the Purchase Price. 









                               29

10.4   Claims Procedure.  If any action is commenced against an 
       Indemnified Party by reason of, arising out of or in 
       connection with any Loss relating to an Indemnified Claim, 
       or if the Buyer receives notice or becomes aware of any 
       such Indemnified Claim, then the Indemnified Party, upon 
       being served with process, or the Buyer upon receiving 
       notice or becoming aware of such Indemnified Claim, shall 
       give written notice ("Indemnification Notice") to the 
       Seller Shareholder of the institution of such action or of 
       the notice received or knowledge acquired of such claim 
       and in such action (and with respect to such Indemnified 
       Claim) Seller Shareholder shall have the obligation to 
       defend the same at Seller Shareholder's expense by 
       counsel reasonably acceptable to Buyer, and to pay any 
       judgment entered therein, but the Buyer and the 
       Indemnified Parties shall have the right, at their 
       option and expense, to participate in any such action 
       or suit with counsel of their own selection. If Seller 
       Shareholder shall fail to timely or adequately defend any 
       such action or claim on behalf of the Indemnified Parties, 
       then the attorneys' fees and legal costs of the 
       Indemnified Parties in defending such action or claim 
       shall be fully included as part of the Loss to be 
       indemnified. 

              If any garnishment, levy, attachment, execution or 
       other lien reaches, garnishees, encumbers or attaches any 
       of the assets, property or business of an Indemnified 
       Party by virtue of, or as a part of, any suit or 
       proceeding concerning any Indemnified Claim, then Seller 
       Shareholder, at its expense, shall be obligated to 
       immediately post whatever bond is required, and do 
       whatever else is required, to expeditiously release the 
       property, assets and business of the Indemnified Parties 
       from any such levy, attachment, execution, lien, 
       garnishment or encumbrance. 

10.5   Seller Shareholder's Response.  The Seller Shareholder may 
       object to any Indemnification Notice of an Indemnified 
       Claim by delivering to Buyer a written statement setting 
       forth, in reasonable detail, the basis of its objection, 
       if any, to the Indemnified Claim asserted in such 
       Indemnification Notice (the "Seller Shareholder's 
       Response").  If the Seller Shareholder's Response is not 
       received by Buyer within thirty (30) days following the 
       date Seller Shareholder receives the Indemnification 
       Notice, the Indemnified Claim set forth in such 
       Indemnification Notice shall be deemed valid and 
       conclusive and binding upon all parties. If Buyer receives 
       Seller Shareholder's Response within such thirty (30) day 
       period, the Indemnified Claim to which the Seller 
       Shareholder's Response relates shall be submitted to 
       arbitration pursuant to the provisions of Section 13.8.

                               30

10.6   Interest. Subject to Section 10.5, with respect to the 
       indemnifications set forth in Section 10.2, Seller 
       Shareholder shall be obligated to reimburse the 
       Indemnified Parties for any valid payment by any 
       Indemnified Party at any time after the Closing in 
       respect of any Loss relating to any Indemnified Claim, 
       including payment pursuant to any settlement or 
       compromise of any such Indemnified Claim approved by 
       Seller Shareholder, together with interest on any such 
       payment at a rate per annum of two (2%) percent in excess 
       of the prime rate as published from time to time by the 
       Wall Street Journal from the date paid or incurred by the 
       Indemnified Party until reimbursed to the Indemnified 
       Party. 

10.7   Waiver. Seller Shareholder irrevocably waives and agrees 
       that it will make no claim against Company of any kind or 
       character, whether by way of subrogation, indemnity, 
       contribution, breach of contract, or any other theory 
       regarding any claim made by Buyer, Company, or any other 
       person under Section 10 or otherwise, and Seller 
       Shareholder irrevocably releases and discharges Company 
       from any such claim. 

10.8   Exclusive Remedy. Buyer agrees that, from and after the 
       Closing, its sole remedy with respect to any and all 
       claims arising out of alleged breaches or violations of 
       Seller Shareholder's representations and warranties set 
       forth in this Agreement shall be pursuant to the 
       provisions set forth in this Section 10 and, to the extent 
       applicable, the provisions of Section 13.8. 

11.    NON-COMPETITION. 

11.1   As used in this Agreement, the following terms shall have 
       the meanings set forth after each, as follows: 

              (a)  "Business" means and includes the business of 
       acting as an unregulated natural gas marketing company. 
       The foregoing includes selling gas to an end user on an 
       unregulated basis and does not include the following 
       activities of SEMCO Energy Gas Company:  (i) regulated 
       sales of natural gas, (ii) marketing its present 
       services to end users as an LDC, and (iii) acting as 
       agent for an end user to provide that end user with 
       services as an LDC. 

              (b)  "Restricted Period" means the period 
       commencing on the Closing Date and ending upon the date 
       two (2) years following the Closing Date. 

              (c)  "Restricted Territory" means and includes the 
       entire State of Michigan. 

                               31

11.2   The Seller Shareholder represents and warrants to Buyer 
       that Company has been actively engaged for many years in 
       the Business throughout the Restricted Territory, and 
       acknowledges that the only object of the covenants not to 
       compete set forth herein is to protect Buyer in connection 
       with its acquisition of the Purchased Shares (and the 
       value of the Purchased Shares as affected by Company's 
       Business and the goodwill thereof), and the covenants in 
       Section 11.3 are reasonable. 

11.3   Seller Shareholder (as used in this Section 11, the term 
       "Seller Shareholder" shall mean and include the entity 
       identified herein as Seller Shareholder together with its 
       direct and remote subsidiaries, parents and affiliates, 
       but excluding the Company) covenants, agrees and warrants 
       that it will not (in any capacity whatsoever, for its own 
       account or for any other person, party or entity), 
       directly or indirectly, engage in the Business, or any 
       phase thereof, in the Restricted Territory, or any part 
       thereof, during the Restricted Period. 

       Seller Shareholder covenants, agrees and warrants that, 
       during the Restricted Period, it will not, directly or 
       indirectly, own, manage, operate, control or have any 
       interest in any business engaged in the Business, or 
       any phase thereof, in the Restricted Territory, or any 
       part thereof. 

       By way of illustration but without limitation, by the 
       above covenants and warranties not to compete, Seller 
       Shareholder covenants, agrees and warrants that, during 
       the Restricted Period, it will not do any of the 
       following:  be a shareholder, owner, investor, lender, 
       partner, member, joint venturer, representative, 
       consultant, broker, sales representative, in or of or 
       to, as the case may be, any person, party or entity 
       engaged in the Business, or any phase thereof, in the 
       Restricted Territory, or any part thereof. 

       Seller Shareholder further covenants, agrees and warrants 
       that it will not at any time, use, divulge, furnish or 
       make accessible to anyone (other than in the ordinary 
       course of activities on behalf of the Company, and 
       consistent with the Company's policies on disclosure), any 
       knowledge or information with respect to the confidential 
       or secret aspects of the Company's Business (including 
       information as to Company's finances, pricing, suppliers, 
       customers, structure or business plan). 





                               32

       Seller Shareholder further covenants, agrees and warrants 
       that it will not at any time during the Restricted Period, 
       directly or indirectly, solicit for any purpose, interfere 
       with or entice away from the Company or hire any employee 
       or agent of Company without the prior written consent of 
       Buyer. 

       Notwithstanding the foregoing, it shall not be a violation 
       of the provisions of this Section 11.3 for Seller 
       Shareholder to own, directly and indirectly, not in excess 
       of one (1%) percent of the total outstanding capital stock 
       of any corporation, engaged in the Business, whose stock 
       is traded on any national stock exchange or the automated 
       quotation system of NASD (NASDAQ), provided Seller 
       Shareholder does not perform any services for, and is not 
       otherwise active in the business of, such corporation. 

11.4   Seller Shareholder agrees that any violation or attempted 
       violation of any of the provisions of Section 11.3 will 
       cause irreparable injury and damage to the Company and 
       that, in the event of any such violation or attempted 
       violation, in addition to any and all other legal and 
       equitable remedies which may be available (including, 
       without limitation, an action for damages), the said 
       covenants and warranties or any of them may be enforced by 
       a temporary and permanent injunction in an action in 
       equity without the necessity of proving actual damage, and 
       without the posting of any bond or other security, and 
       that an ex parte restraining order may be granted 
       immediately upon the commencement of any such action and 
       without notice.  Seller Shareholder acknowledges that the 
       remedy at law for the breach or threatened breach of any 
       of the covenants or warranties contained in Section 11.3 
       would be inadequate. 

11.5   If the aforesaid covenants and warranties not to compete 
       set forth in Section 11.3 are found by any court having 
       jurisdiction in the premises to be too broad in extent, 
       either as to the time period or the geographical area 
       designated, or otherwise, then and in such event the 
       covenants and warranties not to compete shall nevertheless 
       remain effective, but shall be considered amended (as to 
       the time or area or otherwise, as the case may be) to a 
       point considered by said court as reasonable, and as so 
       amended, shall be fully enforceable.  If the court finds 
       that any restriction contained in Section 11.3 is 
       unenforceable and such restriction cannot be amended so as 
       to make it enforceable, such finding shall not affect the 
       enforceability of any other of the restrictions contained 
       in Section 11.3. 



                               33

12.    TERMINATION. 

12.1   This Agreement may be terminated at any time before the 
       Closing Date as follows: 

       (a)    By Buyer and Seller Shareholder in a written 
              instrument. 

       (b)    By either Buyer or Seller Shareholder if the 
              Closing does not occur on the Closing Date. 

       (c)    By Buyer or Seller Shareholder if there shall have 
              been a material breach of any of the 
              representations or warranties set forth in this 
              Agreement on the part of the other, and this breach 
              by its nature cannot be cured before the Closing. 

       (d)    By Buyer or Seller Shareholder if there has been a 
              breach of any of the covenants or agreements set 
              forth in this Agreement on the part of the other, 
              and this breach is not cured within 10 business 
              days after the breaching party or parties receive 
              written notice of the breach from the other party. 

12.2   If terminated as provided in Section 12.1, this Agreement 
       shall forthwith become void and have no effect, except for 
       Sections 12.3 and 13, and except that no party shall be 
       relieved or released from any liabilities or damages 
       arising out of the party's breach of any provision of this 
       Agreement. 

12.3   Buyer, on the one hand, and Seller Shareholder, on the 
       other, warrant and agree that if this Agreement is 
       terminated, each party will not (and, in the case of 
       Seller Shareholder, shall cause Company to not), during 
       the one-year period following the termination, directly 
       or indirectly solicit any employee of the other party 
       to leave the employment of the other party. 

13.    MISCELLANEOUS PROVISIONS. 

13.1   Intentionally Blank. 

13.2   Notices. All notices, demands, and requests required or 
       permitted to be given under the provisions of this 
       Agreement shall be in writing and shall be deemed given 
       (a) when personally delivered or sent by facsimile 
       transmission to the party to be given the notice or other 
       communication or (b) on the business day following the day 
       such notice or other communication is sent by overnight 
       courier to the following: 


                               34

       if to Seller Shareholder:   Mr. William L. Johnson 
                                   Chairman, President & CEO   
                                   SEMCO Energy, Inc. 
                                   405 Water Street 
                                   Port Huron, MI  48060 

       if to Buyer:                CoEnergy Trading Company 
                                   150 W. Jefferson, Suite 1800 
                                   Detroit, Michigan 48226 
                                   Attention: General Counsel 
                                   Fax: 313-965-0009 

       or to such other address or facsimile number that the 
       parties may designate in writing. 

13.3   Assignment. Neither Seller Shareholder nor Buyer shall 
       assign this Agreement, or any interest in it, without the 
       prior written consent of the other, except that Buyer may 
       assign any or all of its rights to any subsidiary or 
       affiliate without Seller Shareholder's consent. 

13.4   Parties in Interest. This Agreement shall inure to the 
       benefit of, and be binding on, the named parties and their 
       respective successors and permitted assigns, but not any 
       other person. 

13.5   Choice of Law. This Agreement shall be governed, 
       construed, and enforced in accordance with the laws of the 
       State of Michigan. 

13.6   Counterparts. This Agreement may be signed in any number 
       of counterparts with the same effect as if the signature 
       on each counterpart were on the same instrument. 13.7 
       Entire Agreement. This Agreement and all related 
       documents, schedules, exhibits, or certificates represent 
       the entire understanding and agreement between the parties 
       with respect to the subject matter and supersede all prior 
       agreements or negotiations between the parties. This 
       Agreement may be amended, supplemented, or changed only by 
       an agreement in writing that makes specific reference to 
       this Agreement or the agreement delivered pursuant to it, 
       and must be signed by the party against whom enforcement 
       of any such amendment, supplement, or modification is 
       sought. 









                               35

13.8   Arbitration. 

       (a)    Any dispute, controversy, or claim arising out of 
              or relating to this Agreement or relating to the 
              breach, termination, or invalidity of this 
              Agreement, whether arising in contract, tort, or 
              otherwise, shall at the request of any party be 
              resolved in binding arbitration. This arbitration 
              shall proceed in accordance with Title 9 of the 
              United States Code, as it may be amended or 
              recodified from time to time ("Title 9"), and the 
              current Commercial Arbitration Rules (the 
              "Arbitration Rules") of the American Arbitration 
              Association ("AAA"), to the extent that Title 9 and 
              the Arbitration Rules do not conflict with any 
              provision of this Section 13.8. 

       (b)    No provision of or the exercise of any rights under 
              this Section 13.8 shall limit the right of any 
              party to seek and obtain provisional or ancillary 
              remedies (such as injunctive relief, attachment, or 
              the appointment of a receiver) from any court 
              having jurisdiction before, during, or after the 
              pendency of an arbitration proceeding under this 
              Section. The institution and maintenance of any 
              such action or proceeding shall not constitute a 
              waiver of the right of any party (including the 
              party taking the action or instituting the 
              proceeding) to submit a dispute, controversy, or 
              claim to arbitration under this Section. 

       (c)    Any award, order, or judgment made pursuant to 
              arbitration shall be deemed final and may be 
              entered in any court having jurisdiction over the 
              enforcement of the award, order, or judgment. Each 
              party agrees to submit to the jurisdiction of any 
              court for purposes of the enforcement of the award, 
              order, or judgment. 

       (d)    The arbitration shall be held before one arbitrator 
              knowledgeable in the general subject matter of the 
              dispute, controversy, or claim and selected by AAA 
              in accordance with the Arbitration Rules, except 
              that any arbitration in which the disputed, 
              controverted, or claimed amount (as reflected on 
              the demand for arbitration, as the same may be 
              amended) exceeds $500,000.00 shall be held before 
              three arbitrators, one arbitrator being selected by 
              Buyer, one by Seller Shareholder, and the third by 
              the other two from a panel of persons identified by 
              AAA who are knowledgeable in the general subject 
              matter of the dispute, controversy, or claim. 

                               36

       (e)    The arbitration shall be held at the office of AAA 
              located in Southfield, Michigan (as the same may be 
              from time to time relocated), or at another place 
              the parties agree on. 

       (f)    In any arbitration proceeding under this Section 
              13.8, subject to the award of the arbitrator(s), 
              each party shall pay all its own expenses, an equal 
              share of the fees and expenses of the arbitrator, 
              and, if applicable, the fees and expenses of its 
              own appointed arbitrator. The arbitrator(s) shall 
              have the power to award recovery of costs and fees 
              (including reasonable attorney fees, administrative 
              and AAA fees, and arbitrators' fees) among the 
              parties as the arbitrators determine to be 
              equitable under the circumstances. 

       (g)    The interpretation and construction of this 
              Section, including but not limited to its validity 
              and enforceability, shall be governed by Title 9 of 
              the U.S. Code, notwithstanding the choice of law 
              set forth in Section 13.5 of this Agreement. 

13.9   Name.  

       (a)    Buyer agrees that, on or before the date which is 
              eighteen (18) months following the Closing Date 
              (such date being herein called the "Name Cutoff 
              Date"), it will cause the Company to: (i) change 
              its corporate name to a name which does not include 
              the word "SEMCO", and (ii) discontinue all use of 
              the name "SEMCO". 

       (b)    During the period between the Closing Date and the 
              Name Cutoff Date: (i) neither the Company nor Buyer 
              will use the existing characteristic "SEMCO" 
              "circle leaf and flame" logo, except only for 
              temporary incidental use during the transition 
              period following the Closing Date (e.g., on Company 
              stationery and forms); (ii) use of the name "SEMCO 
              Energy Services, Inc." in all marketing materials, 
              including correspondence, will not be alone but 
              rather must be in conjunction with the name of 
              Buyer or the name of another entity in which Buyer 
              is not less than a 50% owner or participant, and 
              will include the phrase "formerly a subsidiary of 
              SEMCO Energy, Inc."; (iii) the use of the name 
              "SEMCO Energy Services, Inc." will only be used 
              with unbundled customers; and (iv) Seller 
              Shareholder shall have a right of prior approval of 
              all written materials using the name "SEMCO Energy 
              Services, Inc.", which approval shall not be 

                               37

              unreasonably withheld, delayed or conditioned.  If 
              Seller Shareholder fails to object with specificity 
              in writing to any proposed materials within fifteen 
              (15) days following its receipt of request for 
              approval together with a copy of the material in 
              question, Seller Shareholder shall conclusively be 
              deemed to have approved the material so submitted. 

14.    EXPENSES. Buyer and Seller Shareholder shall pay all of 
       the costs that it incurs incident to the preparation, 
       execution, and delivery of this Agreement and the 
       performance of any related obligations (including 
       notifications under the HSR Act), whether or not the 
       transactions contemplated by this Agreement shall be 
       consummated. 

       IN WITNESS WHEREOF, the parties have executed this 
Agreement on the date first above set forth. 

                                SELLER SHAREHOLDER: 

                                SEMCO Energy, Inc. 

                                By: William L. Johnson
                                   ------------------------------

                                Its: President and CEO
                                    -----------------------------


                                BUYER: 

                                CoEnergy Trading Company 

                                By: Glen D. Kinder
                                   ------------------------------

                                Its: President and CEO
                                    -----------------------------
                                        (Reviewed O.G.C. by MW)



h:\docsopen\ree\c-stpa\0142608.05 










                               38