Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

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Effective Date: 09/01/2003, Docket: RP03-286-001, Status: Suspended

Twenty-Sixth Revised Sheet No. 16A Twenty-Sixth Revised Sheet No. 16A : Suspended

Superseding: Twenty-Fifth Revised Sheet No. 16A

NOTICE OF CURRENTLY EFFECTIVE RATES

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(ALL RATES ARE STATED IN CENTS PER DEKATHERM)

TOP GAS SUPPLY BASE TARIFF

BASE TARIFF GTI ACA THROUGHPUT REALIGNMENT RATE PLUS

RATE SCHEDULE UNIT RATE SURCHARGE SURCHARGE SURCHARGE SURCHARGE SURCHARGES

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RATE SCHEDULE ST-1 CONTINUED

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FIRM COMMODITY GATHERING CHARGE

MAXIMUM A/B/ RATE PER DKT 107.775 N.A. N.A. N.A. N.A. 107.775

MINIMUM A/B/ RATE PER DKT 1.433 N.A. N.A. N.A. N.A. 1.433

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A/ SHIPPER MUST REIMBURSE TRANSPORTER IN-KIND FOR GATHERING FUEL USE, LOST AND UNACCOUNTED FOR GAS. THE APPLICABLE PERCENTAGE IS 0.517%, CONSISTING OF 0.817% FOR THE

CURRENT PERCENTAGE AND (0.300)% FOR THE DEFERRAL PERCENTAGE. THIS PERCENTAGE SHALL BE APPLIED TO THE APPLICABLE QUANTITIES OF GAS TENDERED TO TRANSPORTER FOR

SHIPPER'S ACCOUNT AT THE RECEIPT POINT(S) INTO TRANSPORTER'S GATHERING FACILITIES.

B/ SHIPPER MUST REIMBURSE TRANSPORTER FOR ELECTRIC POWER USED FOR GATHERING. THE APPLICABLE RATE IS 0.00000 CENTS, CONSISTING OF 0.00000 CENTS FOR THE CURRENT RATE

AND 0.00000 CENTS FOR THE DEFERRAL RATE. THIS RATE SHALL BE APPLIED TO THE APPLICABLE QUANTITIES OF GAS TENDERED TO TRANSPORTER FOR SHIPPER'S ACCOUNT AT THE

RECEIPT POINT(S) INTO TRANSPORTER'S GATHERING FACILITIES.