Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

Effective Date: 06/01/1997, Docket: RP97-352-000, Status: Effective

Third Revised Sheet No. 106 Third Revised Sheet No. 106 : Effective

Superseding: Second Revised Sheet No. 106

RATE SCHEDULE FS-1

FIRM STORAGE SERVICE (Continued)

2. APPLICABILITY AND CHARACTER OF SERVICE

2.1 Storage service hereunder, up to the Maximum Storage

Deliverability Quantity (MSDQ) and the Maximum Storage

Injection Quantity (MSIQ) specified in Exhibit A to the Service

Agreement, each as adjusted pursuant to the Capacity Adjustment

Provision (CAP) (described in Subsection 1.47 of the General

Terms and Conditions of this Tariff), and up to the Maximum

Storage Capacity Quantity (MSCQ), as adjusted to reflect the

weighted average of the actual Btu content of gas held in

storage for such Shipper, shall be considered firm, and is not

subject to curtailment or interruption at any time, except as

provided in the General Terms and Conditions.

2.2 Storage service hereunder shall consist of the acceptance by

Transporter of gas for injection into storage, the retention of

such gas in storage, and the withdrawal of such gas from

storage for transportation, all in accordance with the

provisions set forth in the Service Agreement.

2.3 Gas is to be injected into storage on a firm basis during the

injection season commencing on April 1 and continuing through

October 31 of the same year. Gas is to be withdrawn from

storage on a firm basis during the withdrawal season beginning

on November 1 and continuing through the following March 31.

Storage injections shall be allowed during the withdrawal

season and withdrawals shall be allowed during the injection

season on a reasonable-efforts basis. Such reasonable-efforts

injections and/or withdrawals shall have a higher priority than

all interruptible storage gas for scheduling and interruption

purposes.

2.4 Provided Shipper has the requisite gas in storage, the MSDQ for

which Shipper has contracted, as adjusted pursuant to the CAP,

will be available for any one hundred days during the

withdrawal season. Shipper shall be required to inject its

MSCQ, as adjusted to reflect the weighted average of the actual

Btu content of gas held in storage for such Shipper, set forth

in the Service Agreement into storage by November 1. In the

event that Shipper fails to inject such MSCQ by November 1, the

above-referenced one hundred days of service will be reduced

accordingly.