Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

Effective Date: 07/01/2002, Docket: RP00-463-004, Status: Effective

Original Sheet No. 237A Original Sheet No. 237A : Effective

GENERAL TERMS AND CONDITIONS (Continued)

13. INTERRUPTION

Transporter may impose daily interruptions as permitted by Service Agreement

or Rate Schedule. For a more detailed explanation of system interruption

priorities, see Subsections 9.21 and 9.23 of the General Terms and Conditions

of this Tariff.

13.1 Insufficient Capacity: When force majeure or other operational

circumstances arise which restrict Transporter's ability to provide

gathering, storage and/or transportation service for all gas tendered

under Service Agreements, which circumstances require service to be

allocated or interrupted, service shall be allocated or interrupted in

accordance with the following:

13.1.1 Firm services: Where available capacity is less than

the aggregate capacity required to satisfy all nominations for

firm gathering, storage and/or transportation services, the

following principles shall apply:

13.1.1.1 The basis for allocating firm capacity on a pro

rata basis on Transporter's system, or for any specific

facilities on Transporter's system, shall be the aggregate

of the firm nominations (for gathering service), MSDQ's or

MSIQ's where appropriate (for storage service), and MDDQ's

(for transportation

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