Northwest Pipeline Corporation G P

Fourth Revised Volume No. 1

Effective Date: 11/01/2009, Docket: RP09-1056-000, Status: Effective

First Revised Sheet No. 21A First Revised Sheet No. 21A

Superseding: Original Sheet No. 21A

RATE SCHEDULE TF-1

Firm Transportation (Continued)

6. SCHEDULED OVERRUN TRANSPORTATION (Continued)

For Scheduled Quantities in excess of Shipper's Transportation

Contract Demand, Shipper shall pay for the excess gas transportation on

any such day the amounts specified below:

6.1 An amount obtained as the sum of (a) and (b):

(a) An amount obtained by multiplying (i) the quantity of Dth in

excess of Transportation Contract Demand by (ii) the Maximum

Currently Effective Scheduled Overrun Transportation rate per Dth

as set forth on Sheet No. 5 of this Tariff, unless otherwise

agreed to by Shipper and Transporter.

(b) An amount obtained by multiplying (i) the quantity of Dth in

excess of Transportation Contract Demand by (ii) the sum of the

applicable GRI adjustment and the ACA component as set forth on

Sheet No. 5 of this Tariff. These charges shall be subject to

adjustment in accordance with Sections 13 and 16 of the General

Terms and Conditions.

rate other than the Currently Effective Maximum Scheduled Overrun

Transportation rate, Shipper may, when nominating, electronically

select an option that will automatically increase (by a stated

dollar increment per dth) such rate up to the rate that will

increase the likelihood of such quantities being scheduled

pursuant to Section 12 of the General Terms and Conditions.

6.2 The fuel reimbursement provided for in Section 7 of this Rate

Schedule.