Northwest Pipeline Corporation G P

Fourth Revised Volume No. 1

Effective Date: 02/20/2009, Docket: RP09-227-000, Status: Effective

First Revised Sheet No. 19 First Revised Sheet No. 19

Superseding: Original Sheet No. 19

RATE SCHEDULE TF-1

Firm Transportation

(Continued)

3. MONTHLY RATE(S) (Continued)

reduction for fuel use reimbursement furnished in kind in

accordance with the terms of the executed Service Agreement and

Section 14 of the General Terms and Conditions, by (ii) the

accepted volumetric bid made by a Replacement Shipper or a

Prearranged Replacement Shipper and by (iii) the Rate Schedule

TF-1 Capacity Release Service Base Tariff Volumetric Charge, both

as set forth on Sheet No. 5 of this Tariff.

(b) The amount set forth in Section 3.2 (b) hereof.

factor volumetric commitment, an amount equal to the accepted

volumetric bid times the difference, if positive, between (i) the

specified average load factor times Replacement Shipper's or

Prearranged Replacement Shipper's Transportation Contract Demand

times the number of days the Transportation Service Agreement is

in effect during the month, and (ii) the quantity of Dth delivered

by Transporter to Replacement Shipper or Prearranged Replacement

Shipper under the subject Service Agreement during the month.

3.4 Additional Facility Reservation Surcharge: If additional

facilities other than those specified in Section 1(b) of this Rate

Schedule are required to permit continued service to a Shipper under

this Rate Schedule TF-1, such Shipper will pay, in addition to all other

applicable rates stated in this Section 3, a Facility Reservation

Surcharge. The Facility Reservation Surcharge will be derived based on

Transportation Contract Demand and the cost of service attributable to

any such incremental facilities prorated over an appropriate time period

as agreed to by the Shipper, until such time as a different allocation

procedure is specified by Commission order. The monthly Facilities

Reservation Surcharge will be the sum of the daily product of Shipper's

Transportation Contract Demand as specified in the executed Service

Agreement and the applicable Facility Charge specified in the Footnotes

to Sheet No. 5 of this Tariff.