West Texas Gas, Inc.

First Revised Volume No. 1

Effective Date: 10/01/2009, Docket: RP09-977-000, Status: Effective

Twenty-Seventh Revised Sheet No. 4 Twenty-Seventh Revised Sheet No. 4

Superseding: Sub. Twenty-Sixth Revised Sheet No. 4

WEST TEXAS GAS, INC.

Statement of Maximum Effective Rates

(Rate per dth)

New Mexico Rate

Spot Fuel & Loss Total Non-Gas

Rate Price Retention Gas Cost Cost Total Gross Total

Schedule Index Factor Rate Rate Surcharge 3/ Rate Rec. Tax Rate

FS-1 1/ 4.04% 2/ $0.3020 $0.0019 4/ 5.25% 5/

IS-1 1/ 4.04% 2/ $0.3020 $0.0019 4/ 5.25% 5/

Notes:

1/ The Spot Price Index shall be equal to the index price published in the first of the month "Inside FERC Gas

Market Report" under the table "Prices of Spot Gas Delivered to Pipelines" for El Paso Natural Gas Company

- Permian Basin.

2/ The Total Gas Cost Rate shall be equal to the applicable Spot Index multiplied by one plus Fuel and Loss

Retention Factor.

3/ The Surcharge shall include the ACA Surcharge pursuant to Section 21 of the General Terms and Conditions and any

surcharge for unrecovered purchased as costs pursuant to Section 20 of the General Terms and Conditions.

4/ The Total Rate shall be equal to the sum of the Total Gas Cost Rate, the Non-Gas Cost Rate, and the Surcharge

for deliveries outside of New Mexico.

5/ The Total Rate for deliveries in New Mexico shall be equal to the Total Rate for outside of New Mexico

multiplied by one plus the New Mexico Gross Receipts Tax Factor. The New Mexico Gross Receipts tax shall not

be imposed on any exempt sales.