Williston Basin Interstate Pipeline Co.

First Revised Volume No. 1

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Effective Date: 09/01/1995, Docket: RP90-137-024, Status: Effective

1st Rev Thirteenth Revised Sheet No. 18 1st Rev Thirteenth Revised Sheet No. 18 : Superseded

Superseding: 2nd Sub Thirteenth Revised Sheet No. 18

NOTICE OF CURRENTLY EFFECTIVE RATES

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(ALL RATES ARE STATED IN CENTS PER DEKATHERM)

TOP GAS SUPPLY BASE TARIFF

BASE TARIFF GRI ACA THROUGHPUT REALIGNMENT RATE PLUS

RATE SCHEDULE UNIT RATE SURCHARGE A/ SURCHARGE SURCHARGE B/ SURCHARGE SURCHARGES

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RATE SCHEDULE IT-1

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COMMODITY CHARGE

MAXIMUM C/ D/ RATE PER DKT 49.862 0.850 0.226 16.431 N.A. 67.369

MINIMUM C/ RATE PER DKT 3.024 0.000 0.226 0.000 N.A. 3.250

SCHEDULED OVERRUN CHARGE

MAXIMUM C/ RATE PER DKT 42.088 0.850 0.226 16.431 N.A. 59.595

MINIMUM C/ RATE PER DKT 3.024 0.000 0.226 0.000 N.A. 3.250

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A/ GRI SURCHARGE IS APPLICABLE TO TRANSPORTATION DELIVERIES TO ALL DELIVERY POINTS EXCEPT POINTS OF INTERCONNECTION WITH GRI MEMBER PIPELINES. IF A

TRANSPORTATION TRANSACTION IS DISCOUNTED, THE GRI SURCHARGE(S) WILL BE DEEMED TO BE THE FIRST COMPONENT OF THE TOTAL RATE TO BE DISCOUNTED.

B/ THE THROUGHPUT SURCHARGE CONSISTS OF 8.925 CENTS PER DKT FOR COSTS BEING RECOVERED PURSUANT TO DOCKET NOS. RP90-137-000, PLUS 0.048 CENTS PER DKT FOR COSTS

BEING RECOVERED PURSUANT TO DOCKET NO. RP91-56-000, PLUS 7.458 CENTS PER DKT FOR COSTS BEING RECOVERED PURSUANT TO DOCKET NO. RP93-175-000. THE

THROUGHPUT SURCHARGE IS BASED UPON THE THROUGHPUT UNDERLYING RATES FILED AUGUST 24, 1995 IN DOCKET NOS. RP92-236 ET AL.

C/ SHIPPER MUST REIMBURSE TRANSPORTER FOR TRANSPORTATION FUEL USE, LOST AND UNACCOUNTED FOR GAS EITHER IN-KIND OR IN-DOLLARS AS SPECIFIED IN THE SERVICE

AGREEMENT. FOR IN-KIND REIMBURSEMENT, THE APPLICABLE PERCENTAGE IS 3.299%, CONSISTING OF 4.665% FOR THE CURRENT PERCENTAGE AND (1.366)% FOR THE SURCHARGE

ADJUSTMENT. FOR FUEL CHARGE REIMBURSEMENT IN-DOLLARS, THE APPLICABLE RATE IS 5.025 CENTS, CONSISTING OF 7.035 CENTS FOR THE CURRENT CHARGE AND (2.010) CENTS

FOR THE SURCHARGE ADJUSTMENT. THESE PERCENTAGES OR CHARGES SHALL BE APPLIED TO THE APPLICABLE QUANTITIES OF GAS TENDERED TO TRANSPORTER FOR SHIPPER'S ACCOUNT

AT THE RECEIPT POINT(S) INTO TRANSPORTER'S TRANSMISSION FACILITIES.

D/ THE GAS SUPPLY REALIGNMENT BASE RATE UNIT COST INCLUDED IN THE COMMODITY CHARGE BASE TARIFF RATE CONSISTS OF 7.134 CENTS PER DKT FOR COSTS BEING RECOVERED

PURSUANT TO DOCKET NO. RP94-48-000 PLUS 0.640 CENTS PER DKT FOR COSTS BEING RECOVERED PURSUANT TO DOCKET NO. RP95-110-000 BASED ON THE STIPULATED RATE SCHEDULE

IT-1 QUANTITY OF 7,354,757 DKT.