AMENDMENT
                            TO GAS PURCHASE CONTRACT


The undersigned  parties,  in consideration  of the mutual  covenants  contained
herein,  hereby agree to amend, as described  below,  the gas purchase  contract
("Contract")  dated  October  1,  1990  between  Arkansas  Western  Gas  Company
("Buyer")  for the  account of  Associated  Natural Gas  Company,  a division of
Arkansas Western Gas Company, and SEECO, Inc. ("Seller").

         1. The phrase  "Contract Annual Quantity" shall be changed to "Contract
Annual Volume" wherever it appears throughout the Contract.

         2. Section 2(B) shall be deleted in its entirety and replaced  with the
            following:

                  (B) It is  understood  that Seller shall deliver to Buyer on a
                  daily basis the quantity  requested by Buyer up to the Maximum
                  Daily Quantity. Should Buyer desire a daily quantity in excess
                  of  such   quantities,   Seller  shall  advise  Buyer  of  the
                  availability or nonavailability of such gas and, if available,
                  when   deliveries  can  commence.   However,   notwithstanding
                  anything  contained in this contract,  Buyer's receipts of gas
                  hereunder shall fluctuate only to the extent such fluctuations
                  are  required by the demands of Buyer's  utility  customers in
                  northeast Arkansas and southeast  Missouri.  Seller shall have
                  no  obligation  to deliver gas to Buyer under this contract to
                  be used  for  resale  to  third  parties  other  than  Buyer's
                  northeast  Arkansas and southeast  Missouri utility customers.
                  Buyer shall take gas hereunder at monthly rates which match as
                  closely as  reasonably  possible  Buyer's  historical  monthly
                  takes under this contract.

         3. Section 6(A) shall be deleted in its entirety and replaced  with the
            following:

                  (A) Subject to the provisions hereinafter set forth, the price
                  payable   hereunder  shall  be  the  price  contained  in  the
                  currently effective contract pricing schedule attached to this
                  contract.  The first such contract  pricing  schedule shall be
                  effective  October 1, 1997.  Each time the price payable under
                  this contract is redetermined, a new contract pricing schedule
                  which identifies the  redetermined  price shall be attached to
                  this  contract,  and shall  supersede  the  previous  contract
                  pricing schedule.

         4. Section (A) (c) of the General Terms and Conditions shall be deleted
            in its entirety and replaced with the following:

                  (c)The  volume  of gas  shall  be  measured  at each  Point of
                  Delivery  by  orifice   meters   installed  and  operated  and
                  computations made as prescribed in the latest accepted version
                  of the  American Gas  Association  Gas  Measurement  Committee
                  Report No. 3, except as the parties may otherwise agree or may






                  otherwise have provided  elsewhere  herein.  The values of the
                  Reynolds  number  factor,   expansion  factor,  and  manometer
                  factor, or any of them, may be assumed by Buyer to be one (1).

Dated September 30, 1997.


ARKANSAS WESTERN GAS COMPANY                    SEECO, INC


By: /s/  CHARLES V. STEVENS                     By:  /s/  DEBBIE J. BRANCH
   -------------------------                       --------------------------  
   Charles V. Stevens                              Debbie J. Branch
   Vice President and                              Senior Vice President
   Assistant to Chairman                           Southwestern Energy Services
                                                   Company, Agent for SEECO,
                                                   Inc.





                            CONTRACT PRICING SCHEDULE
                    TO OCTOBER 1, 1990 GAS PURCHASE CONTRACT


         Effective  October  1,  1997,  the  price  payable  for  gas  purchased
hereunder shall be as follows:

         Monthly Reservation Fee:        $91,250

         Commodity Cost Per MMBtu:      The index as published in Inside
                                        FERC's Gas Market Report (Prices
                                        of Spot Gas Delivered to Pipelines,
                                        per MMBtu dry) for the first day of
                                        the applicable month for deliveries
                                        into NorAm Gas Transmission
                                        Company (East)

         Commodity Price Cap:           $16,250 per month from October
                                        1997 through September 1998.  The
                                        commodity cost per MMBtu dry
                                        (excluding reservation fee and price
                                        cap fee) shall not exceed $3.60
                                        NorAm East for the first 300,000
                                        MMBtu purchased in November
                                        1997, the first 450,000 MMBtu
                                        purchased in December 1997, the
                                        first 450,000 MMBtu purchased in
                                        January 1998, and the first 300,000
                                        MMBtu purchased in February 1998.

Dated September 30, 1997.


ARKANSAS WESTERN GAS COMPANY                     SEECO, INC


By: /s/  CHARLES V. STEVENS                      By:  /s/  DEBBIE J. BRANCH
   --------------------------                       --------------------------
   Charles V. Stevens                               Debbie J. Branch
   Vice President and                               Senior Vice President
   Assistant to Chairman                            Southwestern Energy Services
                                                    Company, Agent for SEECO,
                                                    Inc.