Overthrust Pipeline Company

First Revised Volume No. 1-A

Effective Date: 11/01/1994, Docket: RP94-104-003, Status: Effective

Sub. First Revised Sheet No. 21 Sub. First Revised Sheet No. 21 : Superseded

Superseding: ORIGINAL SHEET NO. 21

RATE SCHEDULE IT

INTERRUPTIBLE TRANSPORTATION SERVICE

(a) Usage Charge. Shipper shall pay the

appropriate usage charge for all gas received by Overthrust

for transportation. The usage charge shall be set forth in

the transportation service agreement or any amendment, and

shall be no more than the maximum nor less than the minimum

rate specified in the Statement of Rates.

(b) Unauthorized Overrun Charge. Shipper shall

pay the unauthorized overrun charge set forth on

Overthrust's Statement of Rates for all unauthorized

quantities of gas transported by Overthrust.

additional facilities shall be paid by Shipper according to

(d) Balancing Charge. An imbalance charge may be

assessed according to 16 of the General Terms and

Conditions.

(e) Other Charges. Overthrust shall charge

Shipper for any other FERC-approved charges that may apply

to service under this rate schedule.

3.2 Rate Changes.

Overthrust may from time to time file with the

FERC to change the rates set forth on the Statement of Rates

applicable to service under this rate schedule. Overthrust

shall be entitled to implement such changed rates for

service rendered to Shipper under this rate schedule on

their effective dates, subject to such refunds, surcharges

or other conditions that are specified as terms of the

transportation service agreement or that are permitted or

required by the FERC. Nothing in this section limits

Shipper's rights to contest such changes, nor limits the

rights of Shipper and Overthrust to provide for lawful

changes in rates through the terms of the transportation

service agreement.

3.3 Flexible Rates. Nothing in this tariff limits

Overthrust's right to implement different rates in