Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

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Effective Date: 10/06/2003, Docket: RP04- 23-000, Status: Effective

Original Sheet No. 144 Original Sheet No. 144 : Effective

TRANSPORTATION GENERAL TERMS AND CONDITIONS

(Continued)

19. PRIORITY OF SERVICE, SCHEDULING AND NOMINATIONS (Continued)

19.2 PRIORITY OF INTERRUPTIBLE SERVICE

Interruptible transportation service under this FERC Gas Tariff, Third

Revised Volume No. 1-A, shall be provided when and to the extent that

capacity is available in GTN's existing facilities, subject to the

priorities of service set forth herein. GTN will provide

interruptible transportation service first to the Shipper(s) paying

the highest rate. (Shippers paying a Negotiated Rate that exceeds the

maximum applicable tariff rate shall be considered to be paying the

maximum applicable tariff rate.) For the purposes of Section 19.2,

the term "highest rate" shall be determined by multiplying the

distance in pipeline miles (from the receipt point to the delivery

point) by the mileage component(s) of the ITS-1 rate (including

applicable surcharges), and then adding the non-mileage component(s)

of the ITS-1 rate (including applicable surcharges). In the event of

a tie, GTN shall allocate interruptible capacity among interruptible

Shippers on a pro-rata basis based on confirmable nominations.

(Continued)