Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

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Effective Date: 03/09/2010, Docket: RP10-490-000, Status: Effective

Third Revised Sheet No. 29 Third Revised Sheet No. 29

Superseding: Second Revised Sheet No. 29

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

8/ This agreement is for service under GTN's Rate Schedule PS-1. The fee

charged for this service under this agreement shall be determined as follows:

Maximum Allowable Total Quantity to be Parked: 150,000 Dth

Maximum Allowable Daily Quantity to be Parked: 10,000 Dth per day (or as

otherwise agreed upon by GTN

and Powerex Corp.)

Allowable Period to Park Quantities: March 9 - March 26, 2010

Allowable Period to Withdraw Parked Quantities: January 1 - January 31, 2011

Total Charge USD (assessed April 2010): $163,500

Powerex Corp. shall use good faith efforts to park gas on a rateable basis,

up to the Maximum Allowable Daily Quantity to be Parked, or as otherwise

mutually agreed and further subject to GTN's ability to park such quantities

at the receipt point(s) specified in Powerex Corp.'s Parking Service

Agreement. In addition, Powerex Corp. shall use good faith efforts to

withdraw all gas parked on a rateable basis, plus or minus 20%, or as

otherwise mutually agreed between GTN and Powerex Corp. and further subject

to GTN's ability to redeliver such quantities at the same point(s) the gas

was parked.

Any quantities Powerex Corp. parks on GTN's system in excess of the

contracted quantity between March 9, 2010 through March 26, 2010, and any

quantities parked in periods other than March 9, 2010 through March 26, 2010

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

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

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

for any difference between the actual parked quantity during March 9, 2010

through March 26, 2010 and the contracted quantity, applicable to any

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

system during March 9, 2010 through March 26, 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 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 January

2011 due to GTN's inability to accommodate a nominated and otherwise

confirmable withdrawal for that quantity during January 2011, 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.