Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

Effective Date: 05/14/2010, Docket: RP10-602-000, Status: Effective

Third Revised Sheet No. 313 Third Revised Sheet No. 313

Superseding: Second Revised Sheet No. 313

GENERAL TERMS AND CONDITIONS (Continued)

37. TAKE-OR-PAY BUYOUT AND BUYDOWN COST RECOVERY MECHANISM

(For Filings Submitted to FERC After November 1, 1990) (Continued)

adjust the fixed monthly surcharge to take into account any

overcollections or undercollections related to such

recalculations. The adjusted fixed monthly surcharge resulting

from the Annual Reconciliation filing shall be effective on July 1

following the filing of the Annual Reconciliation. Such adjusted

fixed monthly surcharge shall be determined by dividing the

adjusted unamortized buyout/buydown costs to be recovered through

the monthly fixed surcharges, plus the adjusted interest, by the

number of months remaining in the total recovery period and adding

thereto carrying charges for the next twelve (12) months.

At the completion of the total recovery period, Transporter shall

bill or return to Shipper(s), including interest, any

undercollections or overcollections under Subsection 37.3.1.

37.3.3 Determination of Throughput Surcharge - The throughput

surcharge for the total recovery period shall be calculated to

recover a percentage to be determined by Transporter of the

amortized amount. The throughput surcharge shall be determined by

dividing the annual principal amount of the costs to be recovered

through the surcharge, plus carrying charges in accordance with

Section 154.501 of the FERC's Regulations, by the effective total

throughput. Such surcharge rate will be specified, as applicable,

on tariff sheets contained in Transporter's FERC Gas Tariff,

Second Revised Volume No. 1. Such rate will be in effect until

adjusted in accordance with Subsection 37.3.4. The throughput

surcharge shall be assessed to all Shippers subject to

Transporter's applicable transportation rates and/or Rate

Schedules contained in Transporter's FERC Gas Tariff, Second

Revised Volume No. 1.

Transporter may from time to time, and at any time, selectively

and separately discount any or all of the throughput surcharge

applicable to transportation