Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

Effective Date: 06/01/2007, Docket: RP07-431-000, Status: Effective

Seventh Revised Sheet No. 247 Seventh Revised Sheet No. 247 : Effective

Superseding: Sixth Revised Sheet No. 247

GENERAL TERMS AND CONDITIONS (Continued)

15. BALANCING AND NOMINATION VARIANCE PROCEDURES (Continued)

15.5.2 Cash-out Balance Crediting: Transporter shall credit,

in accordance with this Subsection, the net cumulative dollar

balance at December 31 of each year resulting from Transporter's

cash-out procedure described in Subsections 15.5 and 15.5.1 (Cash

Account). Transporter's Cash Account shall be the cumulative

volumes and dollars received for excess deliveries, less any

volumes or dollars received from excess receipts, less the cost of

any gas purchased by Transporter to effectuate the cash-out

associated with excess deliveries for the twelve month period

ending December 31, plus any volumes and dollars, if applicable,

from the previous twelve month period ending December 31.

15.5.2.1 In the event Transporter's Cash Account includes

a positive or zero volume balance and a positive dollar

balance, Transporter shall refund the positive dollar

balance in accordance with Subsection 15.5.2.3. Any

positive volume balance shall be included as an offset to

Transporter's Transportation Fuel Use and Lost and

Unaccounted For Gas as reflected in Subsection 38.4.2.1.1.2

of these General Terms and Conditions.

15.5.2.2 In the event Transporter's Cash Account includes

a negative volume balance and positive dollar balance,

Transporter shall use the following formula to determine the

dollar balance subject to refund in accordance with

Subsection 15.5.2.3:

Positive dollar balance - (Negative volume * higher of

January 1 index price as posted in "Inside FERC Gas

Market Report" for Colorado Interstate Gas Company

(CIG-Rocky Mountains) or Northern Natural Gas Company

(Ventura, Iowa))

15.5.2.3 Transporter shall refund to each Shipper served

under Rate Schedules FT-1 and IT-1 the total positive dollar

balance under Subsections 15.5.2.1 and 15.5.2.2 for any year

in which such balance exceeds $10,000. Such refund shall be

applied to each applicable Shipper's monthly bill issued

three (3) months subsequent to December 31 of each year

based on the ratio of applicable Shipper's transportation

quantities to total transportation quantities for the twelve

month period ending December 31. Transporter shall carry

over to the subsequent twelve month period ending December

31 any positive dollar balance less than $10,000 and/or any

negative volume and dollar balances.