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. 578 Second Revised Sheet No. 578 : Effective

Superseding: First Revised Sheet No. 578

FORM OF TRANSPORTATION SERVICE AGREEMENT

APPLICABLE TO RATE SCHEDULE STN-1 (Continued)

1. Service hereunder will be offered for firm delivery of the

quantity of gas needed at the delivery point(s) specified in Exhibit A

hereto above or below the daily nominated and scheduled quantity of firm

transportation service provided under Rate Schedule ST-1, subject to the

limits specified in 2. Provided, however, that Transporter shall not be

required to execute a Service Agreement under this Rate Schedule for a

Maximum Daily Delivery Quantity (MDDQ) that exceeds Shipper's corresponding

MDDQ under its Rate Schedule ST-1 Service Agreement.

2. Maximum Transportation Quantities. No-Notice Firm

Transportation service hereunder shall be made available at those delivery

point(s) specified in Exhibit A hereto on a firm basis on any given day.

In the case where actual transportation service takes are above the daily

nominated and scheduled quantity of firm transportation service, no-notice

service shall be made available up to the lesser of Shipper's unutilized

Rate Schedule FS-1 Maximum Storage Deliverability Quantity (MSDQ), as

adjusted pursuant to the Capacity Adjustment Provision (CAP), designated to

serve the particular delivery point(s) plus the amount of additional gas

supply which is received into Transporter's system, pursuant to the

direction of Transporter, and designated to the particular delivery

point(s), or the difference between nominated and scheduled firm deliveries

to the particular firm delivery point(s) under Rate Schedule ST-1 and

Shipper's Rate Schedule ST-1 MDDQ, as adjusted pursuant to the CAP, for the

particular delivery point(s). In the case where actual transportation

service takes are below the daily nominated and scheduled quantity of firm

transportation service, no-notice service shall be made available up to the

lesser of Shipper's unutilized Rate Schedule FS-1 MSIQ, as specified in

Exhibit A to the Service Agreement and as adjusted pursuant to the CAP, and

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

actual Btu content of gas held in storage for such Shipper, designated for

the particular delivery point or the difference between Shipper's specific

daily nominated and scheduled quantity of firm transportation service

provided under Rate Schedule ST-1 and the Rate Schedule ST-1 deliveries

actually taken by the Shipper.

In no event shall Transporter be obligated to receive a quantity of gas at

any receipt point in excess of the Maximum Daily Receipt Quantity (MDRQ)

specified in Exhibit A hereto for such receipt point, as adjusted pursuant

to the CAP, nor shall Transporter be obligated to provide no-notice

deliveries at any delivery point in excess of the MDDQ specified for such

delivery point in Exhibit "A" hereto, as adjusted pursuant to the CAP.