FORM OF SERVICE AGREEMENT
                   (For Use Under Sellers Rate Schedule IS)
   
   
            THIS AGREEMENT entered into as of the ____ day of
       _____________, 20__, by and between Blue Lake Gas Storage Company,
       a Michigan general partnership, hereinafter referred to as
       "Seller," and ___________________________, hereinafter referred to
       as "Customer."
   
                             W I T N E S S E T H
   
            WHEREAS, Customer has requested Seller to store Gas on its
       behalf; and
   
            WHEREAS, Seller has sufficient Storage capacity available to
       provide the Storage Service for Customer on the terms specified
       herein;
   
            NOW, THEREFORE, Seller and Customer agree as follows:
   
                                  ARTICLE I
                               STORAGE SERVICE
   
      1.    Sellers service hereunder shall be subject to receipt of all
            requisite regulatory authorizations from the Federal Energy
            Regulatory Commission ("Commission"), or any successor
            regulatory authority, and any other necessary governmental
            authorizations, in a manner and form acceptable to Seller.
   
      2.    Subject to the terms and provisions of this Agreement,
            Customer may deliver or cause to be delivered to Seller on an
            interruptible basis, Gas up to the Maximum Daily Injection
            Quantity, plus Sellers Injection Use, for Storage up to the
            Maximum Storage Quantity, and Seller agrees to receive, store
            and redeliver at Customers request Equivalent Quantities of
            Gas to or for the account of Customer, on an interruptible
            basis, up to the Maximum Daily Withdrawal Quantity, reduced
            by Sellers Withdrawal Use, as set forth on Exhibit A
            attached hereto.
   
      3.    Seller, if requested by Customer, may inject or withdraw from
            Storage daily quantities in excess of the Maximum Daily
            Injection Quantity or Maximum Daily Withdrawal Quantity
            specified in Paragraph 2, above, if it can do so without
            adverse effect on Sellers operations or its ability to meet
            all higher priority obligations.