Northwest Pipeline Corporation

First Revised Volume No. 1-A

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Effective Date: 01/31/1991, Docket: RP91- 66-000, Status: Effective

First Revised Sheet No. 438 First Revised Sheet No. 438 : Effective

Superseding: Original Sheet No. 438

GENERAL TERMS AND CONDITIONS

(Continued)

19. SUPPLIER SETTLEMENT PAYMENT RECOVERY MECHANISM (Continued)

19.3 Determination of the Commodity SSP Surcharge (Continued)

(b) The Commodity SSP Surcharge is set forth on Sheet No. 201 of

this FERC Gas Tariff First Revised Volume No. 1-A. Transporter

shall adjust the Commodity SSP Surcharges in accordance with

the provision as set forth in Paragraph (a) above.

19.4 Establishment of a Commodity SSP Account. Transporter shall

establish a separate Commodity SSP Account. The initial balance

in the SSP Account shall be the total amount as defined in

paragraph (a) of subsection 19.3 herein. Beginning in April 1989

and for each month thereafter, the subaccount balance of the

Commodity SSP Account shall be (i) increased by the applicable

percentage, as defined in paragraph (c) of subsection 19.2 herein,

of SSP costs incurred by Transporter and not previously included,

(ii) decreased by amounts recoverable by Transporter from Shippers

in the form of SSP surcharges, and (iii) increased by the amount of

carrying charges calculated accordance with Section 154.67(c) of the

Commission's regulations.

19.5 Filing Procedure. Transporter shall adhere to the Filing Procedures

outlined below when adjusting the Commodity SSP Surcharge.

(a) At least thirty (30) days prior to the effective date of any

Commodity SSP Surcharge adjustment to be effective pursuant

to Subsection 19.3 herein, Transporter shall file with the

Commission and post, as defined by Section 154.16 of the

Commission's regulations, a revised Sheet No. 201 to set forth

a revised Commodity SSP Surcharge under the Applicable Rate

Schedules. Transporter shall file the aforementioned sheets to

be effective for each January 1, April 1, July 1 and October 1

that fall within the Total Recovery Period.