Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

Effective Date: 08/01/1997, Docket: RP97-410-000, Status: Effective

Second Revised Sheet No. 652 Second Revised Sheet No. 652 : Effective

Superseding: First Revised Sheet No. 652

FORM OF SERVICE AGREEMENT

APPLICABLE TO RATE SCHEDULE IS-1 (Continued)

This Service Agreement, made and entered into as of _______________,

by and between WILLISTON BASIN INTERSTATE PIPELINE COMPANY, hereinafter

called "Transporter", and _______________________, hereinafter called

"Shipper".

WHEREAS, Transporter from time to time has, or anticipates having,

available injection, withdrawal, and storage capabilities at its aggregate

storage fields to store all or a portion of the gas which Shipper desires

to have stored on an interruptible basis; and

WHEREAS, Shipper desires interruptible storage service from

Transporter as specified herein pursuant to Subpart ______ (B or G) of Part

284 of the FERC's Regulations; and

WHEREAS,

NOW, THEREFORE, for and in consideration of the premises and the

mutual covenants hereinafter contained, Transporter and Shipper agree as

follows:

Transporter agrees to provide interruptible storage service for

Shipper pursuant to Transporter's Rate Schedule IS-1 as specified below.

1. The maximum daily interruptible quantity of gas to be injected

into storage (Interruptible Injection Quantity), the maximum daily

interruptible quantity of gas to be withdrawn from storage (Interruptible

Withdrawal Quantity), and the maximum gas inventory to be stored by

Transporter on behalf of Shipper (Interruptible Capacity Quantity) are

specified in Exhibit A hereto.

2. Authorized Overrun Quantities. Upon request of Shipper and at

Transporter's option, Transporter may inject or withdraw, on an

interruptible basis, quantities of gas for Shipper's account, on any day,

in excess of Shipper's Interruptible Injection Quantity and/or

Interruptible Withdrawal Quantity as specified in Exhibit "A" to this

Service Agreement. For such excess gas injected and/or withdrawn, Shipper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.