Puget Sound Energy, Inc.

Original Volume No. 1

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Effective Date: 11/01/1999, Docket: CP98-250-003, Status: Effective

Original Sheet No. 93 Original Sheet No. 93 : Effective

Exhibit F

(dated January 16, 1998)

to the

Jackson Prairie

Gas Storage Project Agreement

Operating Rules

Part 1: The Seasonal Working Gas Quantity for an Owner during any Storage Cycle is the least of:

a) The quantity of Owner's Working Gas Inventory at the beginning of such Storage Cycle; or

b) The least quantity of Owner's Working Gas at any time after August 31st and before October 1st of the preceding Storage Cycle divided by 0.80; or

c) The least quantity of Owner's Working Gas Inventory at any time after June 30th and before October 1st of the preceding Storage Cycle divided by 0.35; or

d) The Owner's Firm Working Gas Capacity.

Part 2: The Firm Withdrawal Deliverability of an Owner on any Day is as follows:

a) When the Owner's Available Working Gas Inventory at the start of the Gas Day equals or exceeds 60% of the Owner's Firm Working Gas Capacity, the Firm Withdrawal Deliv

b) When the Owner's Available Working Gas Inventory at the start of the Gas Day is less than 60% but greater than 15% of the Firm Working Gas Capacity of such Owner, the