Questar Overthrust Pipeline Company

Second Revised Volume No. 1-A

Effective Date: 04/25/2007, Docket: RP07-360-000, Status: Effective

Original Sheet No. 100 Original Sheet No. 100 : Effective

GENERAL TERMS AND CONDITIONS

will be credited pro rata to the firm Shippers based on each firm Shipper's

reservation charge payments. Credits shall be reflected on each eligible

Shipper's monthly bill.

Overthrust shall not credit any revenues resulting from interruptible

transportation service made possible through a system expansion, or from the

occurrence of other costs that are not included in firm charges set forth on

the Statement of Rates.

18. FORCE MAJEURE

18.1 If by reason of an event of force majeure either Overthrust or

Shipper is rendered unable, wholly or in part, to perform its obligations

under a service agreement incorporating these General Terms and Conditions,

other than to make payments when due, and if such party gives notice of such

event within a reasonable period of time and provides full particulars of

such event either in writing, by facsimile or via electronic means after the

occurrence of an event of force majeure, nonperformance of the party giving

such notice shall be excused during the continuance of such event and to the

extent its performance is affected by such event. The party claiming force

majeure shall use due diligence to remedy its nonperformance with all

reasonable dispatch, including the making of provision for such alternate

performance as may be economical and practical.