Northwest Pipeline Corporation G P

Fourth Revised Volume No. 1

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Effective Date: 01/14/2010, Docket: RP10-256-000, Status: Effective

Original Sheet No. 399B Original Sheet No. 399B

NON-CONFORMING SERVICE AGREEMENTS (Continued)

Agreement/

Rate Amendment Date

Name of Shipper/Agreement No. Schedule Date Filed

--------------------------------------- -------- --------- --------

Southwest Gas Corporation TF-1 06/01/91 06/24/09

(No. 100049) 02/12/08

Terasen Gas Inc. TF-1 04/19/07 07/21/08

(No. 135562)

TransAlta Centralia Generation LLC TF-1 07/12/01 06/12/06

(No. 127946) 05/26/06 (2)

________________

(2) Original Service Agreement, as amended, was restated in the revised Form

of Service Agreement format on the listed date.