West Texas Gas, Inc.

First Revised Volume No. 1

Effective Date: 05/01/1998, Docket: RP98- 25-005, Status: Effective

First Revised Sheet No. 6 First Revised Sheet No. 6 : Effective

Superseding: Original Sheet No. 6

RATE SCHEDULE IS-1

INTERRUPTIBLE SERVICE

1. Availability: This rate schedule is available to any Buyer for

the purchase of natural gas from Seller, when Buyer and Seller

have executed a service agreement for service under this rate

schedule.

2. Applicability and Character of Service:

2.1 This rate schedule shall apply to all natural gas sold

and delivered to Buyer for interruptible service.

2.2 Deliveries of natural gas under this rate schedule shall

be interruptible.

2.3 It is specifically understood and agreed that deliveries

of interruptible gas may be discontinued by Seller at any time

upon notice of curtailment to Buyer. Seller shall give Buyer

a minimum of two (2) hours' notice of any curtailment except

in the case of emergency. In case of emergency, Seller shall

give Buyer such notice as the circumstances permit. Notice

may be given either in writing, by telephone or in person. As

soon as notice of curtailment or interruption is given by

Seller, Buyer shall curtail or interrupt the use of gas within

the period specified by Seller and shall immediately advise

Seller.

Buyer shall not thereafter resume or increase the use of gas

until such time as Seller shall give notice to Buyer that gas

is available for delivery under this rate schedule. In view

of the fact that deliveries are subject to curtailment, it is

specifically understood and agreed that Buyer assumes the risk

therefore and hereby releases Seller from any liabilities or

damages which may occur to Buyer by reason of any interruption

of service as a result of insufficiency of gas available or

inadequacy of transmission or distribution line capacity.