Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

Effective Date: 08/01/2004, Docket: RP04-377-000, Status: Effective

Tenth Revised Sheet No. 91 Tenth Revised Sheet No. 91 : Effective

Superseding: Ninth Revised Sheet No. 91

RATE SCHEDULE IT-1

INTERRUPTIBLE TRANSPORTATION SERVICE (Continued)

3. TRANSPORTATION SERVICE CHARGES

3.1 Applicable Rates: The applicable maximum and minimum rates for

service hereunder are set forth on Sheet Nos. 18 and 18A of

Transporter's Tariff as it may be revised from time to time. 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.

3.2 Commodity Charge: Shipper shall be charged an amount obtained by

multiplying the unit commodity rate set forth in the Service Agreement

by the quantity of gas in dkt delivered (exclusive of any overrun

volumes) each month by Transporter for Shipper's account at the point(s)

of delivery. The commodity charges hereunder are subject to adjustment

pursuant to the Transition Cost Recovery Mechanisms, the Federal Energy

Regulatory Commission Annual Charge Adjustment Provision, and the Take-

or-Pay Buyout and Buydown Cost Recovery Mechanisms in Sections 39, 41,

36 and 37 of the General Terms and Conditions. Where quantities of gas

to be transported hereunder are gathered through Transporter's gathering

system, Shipper shall be charged an additional commodity amount obtained

by multiplying the unit gathering rate set forth in the Service

Agreement by the quantity of gas in dkt received each month by

Transporter for Shipper's account at the point(s) of receipt into

Transporter's gathering facilities.

3.3 Adjustment of Rates: Subject to the terms of the Service

Agreement, Transporter may prescribe and/or adjust at any time any of

the rates applicable to any individual Shipper without adjusting any

other rates for that or another Shipper; provided, however, that such

adjusted rate(s) shall not exceed the applicable maximum rate(s) nor

shall they be less than the applicable minimum rate(s) set forth on

Sheet Nos. 18 and 18A 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