Southwest Gas Storage Company

First Revised Volume No. 1

Effective Date: 12/15/1999, Docket: RP00- 58-000, Status: Effective

Original Sheet No. 23 Original Sheet No. 23 : Effective

RATE SCHEDULE FSS (Continued)

FIRM STORAGE SERVICE

3. RATE

The rates and charges for firm service under this Rate Schedule FSS

shall include the applicable storage rate components per Dt as

described in Sections 3.1, 3.2 and 3.3.

3.1 Storage Charges

For Storage service rendered to Shipper under this Rate Schedule

FSS, Shipper shall pay Southwest each Month the sum of the

following charges as set forth on the effective Tariff Sheet No. 5

of this Tariff:

(A) Capacity Charge

The monthly capacity charge per Dt is determined by

multiplying the Maximum Annual Quantity (MAQ) by the Capacity

Charge rate, divided by twelve.

(B) Deliverability Charge

The monthly deliverability charge per Dt is determined by

multiplying the Maximum Daily Withdrawal Quantity (MWQ) by

the monthly Deliverability Charge rate.

The injection charge shall be equal to the applicable

injection rate multiplied by the Quantity injected into

Southwest's facilities by Shipper, as provided for in Section

2.2, during any Month.

(D) Withdrawal Charge

The withdrawal charge shall be equal to the applicable

withdrawal rate multiplied by the Quantity withdrawn from

Southwest's facilities, as provided for in Section 2.3,

during any Month.