Puget Sound Energy, Inc.

Original Volume No. 1

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Effective Date: 10/01/2009, Docket: RP09-996-000, Status: Effective

Original Sheet No. 144 Original Sheet No. 144

. .

AMENDMENT NO. 11

to

JACKSON PRAIRIE GAS STORAGE PROJECT AGREEMENT

This Amendment is entered into as of the 28th day of August, 2009, by

and between Northwest Pipeline GP ("Northwest"), a Delaware partnership,

Puget Sound Energy, Inc. ("Puget"), a Washington corporation and Avista

Corporation ("Avista"), a Washington corporation, collectively "the

Owners."

RECITALS:

A. WHEREAS, Northwest, Puget and Avista are parties to that certain

Jackson Prairie Gas Storage Project ("Storage Project") Agreement dated

January 15, 1998, as amended ("Agreement");

B. WHEREAS, a phased expansion of the storage capacity in the Storage

Project has been authorized, as described in a prior notice application

filed with the Federal Energy Regulatory Commission in Docket No. CP02-

384;

C. WHEREAS, the procedures applicable to the development of the

authorized phased storage capacity expansion, as set forth in Exhibit G

to the Agreement, specify that the expansion phases are based on a March

through February water withdrawal/gas injection cycle;

D. WHEREAS, Article 4.6 of the Agreement provides that interim

amendments to Exhibits C, D, E and F (as appropriate) will be made upon

completion of each phase of a phased expansion;

E. WHEREAS, the Owners desire to amend Exhibits C, D and E to reflect

the February 28, 2009 completion of the seventh phase of the authorized

storage capacity expansion;