Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

Effective Date: 08/01/2003, Docket: RP03-286-004, Status: Effective

Ninth Revised Sheet No. 123 Ninth Revised Sheet No. 123 : Effective

Superseding: Eighth Revised Sheet No. 123

RATE SCHEDULE IS-1

INTERRUPTIBLE STORAGE SERVICE (Continued)

3. STORAGE SERVICE CHARGES (Continued)

applicable minimum rate(s) set forth on Sheet No. 20 of this Tariff, or

any superseding tariff. Such minimum and maximum rates shall not be

applicable to service provided pursuant to Section 51 of the General

Terms and Conditions of this Tariff. Should Transporter and Shipper

negotiate a specific discount rate, such downward price adjustment shall

be for a specific term and shall apply only if one or more of the

following instances occur: (1) specified volumes under such Service

Agreement are achieved; (2) during specified periods of the year or for

a specifically defined period; and/or (3) to specified receipt/delivery

points, subsystem(s) and/or other defined geographical area(s). A

discount agreement which provides for an agreed discount as to a

specified volume will not be invalidated if the Shipper transports an

incremental volume above that specified volume. Such incremental volume

will be priced at a mutually agreeable price between Transporter and

Shipper. Unless otherwise agreed, at the expiration of the stated

primary term specified in Exhibit "A" of the Service Agreement, the

rate(s) for service hereunder shall be the maximum allowable rate(s)

under this Rate Schedule.

4. MINIMUM MONTHLY BILL

None.

5. AUTHORIZED SCHEDULED OVERRUN STORAGE

Upon request of Shipper and at Transporter's option, Transporter may

receive for injection and/or withdraw for Shipper's account, on any day,

quantities of gas in excess of Shipper's Interruptible Injection and/or

Withdrawal Quantities. Such quantities shall be injected and/or

withdrawn on an interruptible basis. For such excess gas injected

and/or withdrawn, Shipper shall pay an amount obtained by multiplying

the quantity of such excess gas during the month by the Scheduled

Overrun Charge.

6. FUEL AND ELECTRIC POWER REIMBURSEMENT

Shipper shall reimburse Transporter in-kind for fuel use, lost and

unaccounted for gas and in-dollars for electric power use in accordance

with Subsection 1.15 and Section 38 of the General Terms and Conditions.