FORM OF SERVICE AGREEMENT
                   (For Use Under Sellers Rate Schedule FS)
   
   
            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 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 on any Day during the Summer Period deliver or
            cause to be delivered to Seller, Gas up to the Maximum Daily
            Injection Quantity plus Sellers Injection Use for Storage of
            up to the Maximum Storage Quantity and at Customers request
            on any Day during the Winter Period Seller agrees to Tender
            Equivalent Quantities of Gas to or for the account of
            Customer, on a firm basis, up to the Maximum Daily Withdrawal
            Quantity, reduced by Sellers Withdrawal  Use.
   
      3.    Seller may, if requested by Customer, 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
            its higher priority obligations.