Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

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Effective Date: 02/01/2000, Docket: RP00-165-000, Status: Effective

Third Revised Sheet No. 345A Third Revised Sheet No. 345A : Effective

Superseding: Second Revised Sheet No. 345A

GENERAL TERMS AND CONDITIONS (Continued)

39. TRANSITION COST RECOVERY MECHANISMS (Continued)

reflecting such reconciliation with FERC. The

allocation of any Account No. 191 refund balance

to each of the Applicable Shippers shall be based

on the proportion of each Applicable Shipper's

purchases from Transporter under Rate Schedule G-1

or SGS-1 during the twelve (12) calendar months

immediately preceding the termination of the

Purchased Gas Cost Adjustment Provision to the

total of such purchases by all Applicable

Shippers. Such refund amounts shall be set forth

on Sheet No. 358I of this FERC Gas Tariff, Second

Revised Volume No. 1.

39.3.1.2 Determination of Fixed Monthly Surcharge -

To the extent that the Account No. 191 amounts

referenced in Subsection 39.3.1 reflect an

underrecovery of purchased gas costs, a fixed monthly

surcharge shall be established to recover such amounts

from the Applicable Shippers. The allocation of any

Account No. 191 underrecovery amounts to each of the

Applicable Shippers shall be based on the proportion of

each Applicable Shipper's purchases from Transporter

under Rate Schedule G-1 or SGS-1 during the twelve (12)

calendar months immediately preceding the termination

of Transporter's Purchased Gas Cost Adjustment

Provision to the total of such purchases by Applicable

Shippers. The fixed monthly surcharge, including

carrying charges in accordance with Section 154.501 of

the FERC's Regulations, for each Applicable Shipper

shall be set forth on Sheet No. 359 of this FERC Gas