Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

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Effective Date: 05/27/2006, Docket: RP06-326-000, Status: Effective

First Revised Sheet No. 291 First Revised Sheet No. 291 : Effective

Superseding: Original Sheet No. 291

FORM OF SERVICE AGREEMENT

APPLICABLE TO AUTHORIZED IMBALANCE SERVICE

UNDER RATE SCHEDULE AIS-1

(Continued)

II

Quantity of Gas and Priority of Service

2.1 Beginning on the date specified in Article III and continuing

for the remaining term specified in Article III, GTN agrees

to advance quantities of gas to Shipper up to the Maximum Quantity

(MQ) specified in Exhibit A.

2.2 The service under this Agreement shall be conditioned upon

the availability of capacity sufficient to provide the

service without detriment or disadvantage to those customers

of GTN that have a higher priority of service.

2.3 Prior to initiation of service, Shipper shall provide GTN

with any information required by the FERC, as well as all

information identified in GTN's Transportation General

Terms and Conditions applicable to Rate Schedule AIS-1.

III

Term of Agreement

3.1 This Agreement shall become effective __________, and shall

continue in full force and effect until __________, and year to year

thereafter until canceled by ________day(s) prior written notice

given by either party to the other.

IV

Points of Delivery

4.1 The point(s) of delivery of gas advanced to Shipper is as

designated in Exhibit A, attached hereto.

(Continued)