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. 146 Original Sheet No. 146

Exhibit C

(revised August 28, 2009 pursuant to Amendment No. 11)

to the

Jackson Prairie

Gas Storage Project Agreement

Certificated Characteristics and Capabilities

Characteristics and Capabilities of the Jackson Prairie Storage

Project for the 2009-2010

Storage Cycle and thereafter: *

Project Cushion Gas Requirement Not less than 21,291,345 Mcf

Zone 2 Not less than 17,291,345 Mcf

Zone 9 Not less than 4,000,000 Mcf

Project Working Gas Capacity Not more than 23,087,012 Mcf

Zone 2 Not more than 22,087,012 Mcf

Zone 9 Not more than 1,000,000 Mcf

Project Gas Capacity Not more than 44,378,357 Mcf

Zone 2 Not more than 39,378,357 Mcf

Zone 9 Not more than 5,000,000 Mcf

Project Firm Withdrawal Deliverability Not more than 1,150,000 Mcf Daily

Project Best Efforts Deliverability Not more than 150,000 Mcf Daily

* In addition to the stated quantities, the certificated

Characteristics and Capabilities of the Jackson Prairie Storage

Project include any portions of the expanded cushion and working

gas capacities developed, month to month, during the current water

withdrawal/gas injection cycle of the Capacity Expansion Project

described in Exhibit G.