Questar Overthrust Pipeline Company

Second Revised Volume No. 1-A

Effective Date: 01/06/2009, Docket: RP09-138-000, Status: Effective

First Revised Sheet No. 22 First Revised Sheet No. 22

Superseding: Original Sheet No. 22

RATE SCHEDULE IT

INTERRUPTIBLE TRANSPORTATION SERVICE

transportation service agreements with other Shippers under this rate

schedule within the ranges set forth in the Statement of Rates.

Overthrust will, prior to the beginning of the month and through use of

Informational Postings, post rates at which it is willing to transport gas

between specific receipt and delivery points during the succeeding month.

Overthrust shall state the effective date of the rate change. A shipper

under this rate schedule paying a discounted rate at the time of notification

may elect to pay a higher rate, or the maximum rate, in order to maintain its

priority of service. Acceptance of any new rate shall be confirmed and

contracted for through Questline.

Overthrust shall file with the Commission any and all reports as

required by the Commission's Regulations setting forth the applicable

charges, the individual shippers affected, the volume transported and any

other information that may be required.

3.4 Negotiated Rates. Notwithstanding anything to the contrary

contained in this tariff, Overthrust and Shipper may, as provided in § 31

(Negotiated Rates) of the General Terms and Conditions, negotiate a rate for

service under this rate schedule. Overthrust's rates, as shown on its

Statement of Rates, are available as recourse rates for any Shipper that does

not desire to negotiate a rate with Overthrust. An agreement by the Shipper

to accept a negotiated rate does not, in any manner, restrict the Shipper's

right to elect recourse rates for other services not covered by the

negotiated-rate agreement. This provision, in and of itself, does not allow

Overthrust and Shipper to negotiate terms and conditions of service.

4. REGULATORY FEES

Shipper shall reimburse Overthrust for all fees required by the FERC or

any other regulatory agency to implement the service provided under this rate

schedule. Overthrust will issue its statement to Shipper setting forth the

fees paid by Overthrust to implement the service. The amount to be

reimbursed shall be paid by Shipper with the next payment for service

following receipt of Overthrust's statement.

5. RECEIPT AND DELIVERY

All receipt and delivery points on Overthrust's transmission system are

available for use on an interruptible basis by interruptible Shippers upon

nomination.

6. GENERAL TERMS AND CONDITIONS

All of the General Terms and Conditions of this tariff are applicable

to this rate schedule and are incorporated by reference.