Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

Effective Date: 08/01/2009, Docket: RP99-518-111, Status: Effective

Fifth Revised Sheet No. 26 Fifth Revised Sheet No. 26

Superseding: Fourth Revised Sheet No. 26

STATEMENT OF EFFECTIVE RATES AND CHARGES

FOR TRANSPORTATION OF NATURAL GAS

(Continued)

NEGOTIATED RATE AGREEMENTS UNDER RATE SCHEDULE ITS-1, PS-1, AND AIS-1

Explanatory Footnotes for Negotiated Rates under Rate Schedule ITS-1, PS-1,

and AIS-1

4/ (Continued)

shall be subject to GTN's maximum tariff rate or other such generally

available system-wide discounted rate under Rate Schedule PS-1. Any quantities

withdrawn from GTN's Parking Service in October 2010 shall apply first to the

quantities subject to this agreement and second to any quantities parked

outside the bounds of this agreement.

GTN shall reimburse Powerex Corp. $0.20/Dth, up to the contracted quantity for

any difference between the actual parked quantity during August 1, 2009,

through August 31, 2009, and the contracted quantity, applicable to any

nominated and otherwise confirmable quantities GTN was unable to park on its

system during August 1, 2009, through August 31, 2009, which may be occasioned

by restricted capacity, adverse inventory positions or GTN scheduling errors.

Powerex Corp. is obligated to make nominations on all available nomination

cycles during the day to be eligible for reimbursement. Powerex Corp. shall

have the right to request on subsequent days the makeup of quantities GTN was

unable to park.

GTN shall reimburse Powerex Corp. $0.20/Dth, up to the quantity actually

parked, for any quantities not withdrawn from GTN's system during October

2010 due to GTN's inability to accommodate a nominated and otherwise

confirmable withdrawal for that quantity during October 2010, which may be

occasioned by restricted capacity, adverse inventory positions, or GTN

scheduling errors. Powerex Corp. is obligated to make nominations on all

available nomination cycles during the day to be eligible for reimbursement.

Powerex Corp. shall have the right to request on subsequent days the makeup

of quantities GTN was unable to withdraw.