Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

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

Seventh Revised Sheet No. 658 Seventh Revised Sheet No. 658 : Effective

Superseding: Sixth Revised Sheet No. 658

FORM OF SERVICE AGREEMENT

APPLICABLE TO RATE SCHEDULE IS-1 (Continued)

EXHIBIT "A"

Rate Schedule IS-1 Interruptible Storage Service Agreement

dated _________________between

WILLISTON BASIN INTERSTATE PIPELINE COMPANY (Transporter) and

________________________ (Shipper)

Effective date of Exhibit "A"_____________________________________

Supersedes Exhibit "A" dated _____________________________________

Injection Quantity: __________________ dkt/d

Withdrawal Quantity: __________________ dkt/d

Capacity Quantity: __________________ equivalent dkt

Party on whose behalf transportation service is being provided

pursuant to Section 311 of the NGPA is _____________________.

Negotiated Rate Agreement: Yes_____ No_____

Interruptible Rate Rate

Storage Service Storage Effective Effective

Components Rate (per dkt) Begin Date End Date

--------------------- -------------- ---------- ---------

Capacity Charge 1/ 2/ 2/

Injection Charge 1/ 2/ 2/

Withdrawal Charge 1/ 2/ 2/

1/ Unless discounted by Transporter pursuant to Section 3.3 of Rate

Schedule IS-1, the applicable rate for service hereunder is the

effective maximum rate for Rate Schedule IS-1 service on file with the

FERC, as same may change from time to time. Such 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