Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

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Effective Date: 08/01/1998, Docket: RP98-253-000, Status: Effective

Second Revised Sheet No. 654 Second Revised Sheet No. 654 : Effective

Superseding: First Revised Sheet No. 654

FORM OF SERVICE AGREEMENT

APPLICABLE TO RATE SCHEDULE IS-1 (Continued)

pursuant to the provisions of Transporter's FERC Gas Tariff, Second

Revised Volume No. 1, or other applicable authority.

8. Termination Obligations. Termination of this Service

Agreement shall not relieve Transporter and Shipper of the obligation

to effectuate a zero storage balance hereunder or Shipper of the

obligation to pay money due hereunder to Transporter for services

rendered.

9. Cancellation of Prior Contracts. When this Service

Agreement becomes effective, it shall supersede and cancel the

following contract(s) between the Parties hereto:

10. Injections: The dkt of gas injected into storage under

Rate Schedule IS-1 will be based on the quantity of gas delivered to

Transporter's aggregate storage facilities. The dry dkt injected into

aggregate storage will be calculated using the weighted average of

daily measured Btu content at Transporter's aggregate storage

facilities.

11. Withdrawals: Withdrawals from storage under Rate Schedule

IS-1 will be based on the actual dkt withdrawn from aggregate storage.

The corresponding Mcf volume withdrawn from aggregate storage will be

calculated using Shipper's rolling weighted average Btu's of gas in

storage at the time of withdrawal.

12. Storage Records: A single storage account for each

Shipper will be maintained detailing total injections, withdrawals and

storage balances in both Mcf and dkt for all gas that is the subject

of this Service Agreement.

(The rest of this sheet has been intentionally left blank.)