Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

Effective Date: 11/23/2006, Docket: RP07- 33-000, Status: Effective

Second Revised Sheet No. 633A Second Revised Sheet No. 633A : Effective

Superseding: First Revised Sheet No. 633A

FORM OF SERVICE AGREEMENT

APPLICABLE TO RATE SCHEDULE FS-1 (Continued)

EXHIBIT "A"

Negotiated Rate Agreement: Yes ______ No ______

Rate Rate

Firm Effective Effective

Storage Service Storage Begin End

Components Rates Date Date

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

Injection Charge (dkt) 1/ 2/ 2/

Withdrawal Charge (dkt) 1/ 2/ 2/

Capacity Reservation Charge

(Equivalent dkt) 1/ 2/ 2/

Deliverability Reservation

Charge (Equivalent dkt) 1/ 2/ 2/

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

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

effective maximum rate for Rate Schedule FS-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.

2/ Unless otherwise noted, rates will be in effect for the term of the

contract.

3/ Shipper's quantities shown do not reflect the reimbursement of fuel in-

kind. In accordance with Transporter's currently effective FERC Gas

Tariff, such quantities are subject to being grossed up to reflect the

fuel in-kind percentage.

(The rest of this sheet has been intentionally left blank.)