OMNIBUS PROJECT AGREEMENT

                                  by and among

                      SOUTHWESTERN ENERGY PIPELINE COMPANY

                           SOUTHWESTERN ENERGY COMPANY

                      ENOGEX ARKANSAS PIPELINE CORPORATION

                                   ENOGEX INC.







                                TABLE OF CONTENTS

                                                                                                           Page No.

                                                                                                                  
         1.       Definitions.....................................................................................1

         2.       Acquisition and Maintenance of Interests in NOARK...............................................6

         3.       Acquisition of Ozark............................................................................6

         4.       Acquisition of Searcy Gathering Assets .........................................................7

         5.       NGSC ...........................................................................................7

         6.       Acquisition and Merger of AWP...................................................................7

         7.       Closing.........................................................................................8

         8.       Ownership in NOARK, and Status of Capital Accounts..............................................8

         9.       NOARK  Debt ....................................................................................9

         10.      FERC and HSR Applications......................................................................10

         11.      Representations and Warranties of Enogex and EAPC..............................................11

         12.      Representations and Warranties of SWN and SWPL.................................................20

         13.      Expenses.......................................................................................29

         14.      Conditions to Closing..........................................................................29

         15.      Indemnification................................................................................32

         16.      Brokers........................................................................................35

         17.      Notices........................................................................................35

         18.      Public Announcements...........................................................................37

         19.      Dispute Resolution ............................................................................37


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         20.      Governing Law..................................................................................41

         21.      Amendments and Waivers.........................................................................41

         22.      Binding Effect; Non-Assignability and Alienation
                   of Benefits...................................................................................41

         23.      Severability...................................................................................42

         24.      Headings and Exhibits..........................................................................41

         25.      Construction...................................................................................42

         26.      Multiple Counterparts..........................................................................42

                                    EXHIBITS

Exhibit A         Form of Asset Purchase and Sale Agreement for the Acquisition of the Ozark
                  Pipeline Assets

Exhibit A-1       Ozark Pipeline Description

Exhibit B         The Searcy Gathering Assets

Exhibit C         Form of Asset Purchase and Sale Agreement for the Acquisition of the Searcy
                  Gathering Assets

Exhibit D         Mutual Release and Settlement Agreement between SWN, SWPL, SEMCO Energy,
                  Inc. and their Respective Affiliates

Exhibit E         Assets of AWP

Exhibit F         Amended and Restated Partnership Agreement of NOARK

Exhibit G         Assets of NGSC

Exhibit H         Operating Agreement for NES L.L.C.

Exhibit I         Operating Agreement for OGG L.L.C.

Exhibit J         Description of Interconnection, Integration and Expansion of Pipeline Facilities of
                  NOARK and Ozark


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Exhibit K         Election to Convert

Exhibit L         NOARK Debt Structure

Exhibit M         Enogex and EAPC Officers' Certificates

Exhibit N         SWN and SWPL Officers' Certificates

                                    SCHEDULES

Schedule 7(b)              Pipeline Extension Project

Schedule 11(g)             Ozark Disclosure Schedule

Schedule 11(h)             Searcy Disclosure Schedule

Schedule 12(g)(iii)        NOARK Pipeline System and the AWP Pipeline System

Schedule 12(g)(iv)         List of all contracts, agreements and commitments to which NOARK or
                           AWP, or any of their assets, are bound

Schedule 12(g)(v)          Material Claims

Schedule 12(g)(ix)         Liens

Schedule 12(g)(xiii)       Material Adverse Changes

Schedule 12(g)(xv)         Tax Examinations

Schedule 12(g)(xix)        Intellectual Property


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                            OMNIBUS PROJECT AGREEMENT

         THIS  AGREEMENT  ("Agreement")  is  entered  into as of the 12th day of
January 1998, by and among  Southwestern  Energy Pipeline  Company,  an Arkansas
corporation  ("SWPL"),  Southwestern  Energy  Company,  an Arkansas  corporation
("SWN"), Enogex Arkansas Pipeline Corporation,  an Oklahoma corporation ("EAPC")
and Enogex Inc., an Oklahoma corporation ("Enogex").

                                R E C I T A L S:

         EAPC is  currently  negotiating  to acquire (i) all of the  partnership
interests owned by Prudential in NOARK and (ii) all of the partnership interests
owned  by SEMCO in  NOARK.  EAPC is also  currently  negotiating  to enter  into
definitive  agreements  to acquire (i) all of the  pipeline  assets of Ozark and
(ii) the Searcy Gathering Assets owned by Warren  Petroleum  Company,  L.P. EAPC
intends to form EIT which shall be the entity which  enters into the  definitive
agreement to acquire all of the pipeline assets of Ozark.

         SWPL owns all of the  partnership  interests  of NOARK,  other than the
partnership  interests  owned  by  SEMCO  and  Prudential.  SWN  owns all of the
outstanding  capital  stock of AWP,  and  intends to convey  such stock to SWPL.
Following such conveyance, SWPL intends to merge AWP into AWP L.L.C., subject to
the receipt of all necessary FERC approvals.

         In the event EAPC  successfully  completes the acquisition of the NOARK
partnership  interests  owned  by  Prudential  and  SEMCO,  and EIT  executes  a
definitive  agreement for the acquisition of the pipeline assets of Ozark,  EAPC
and SWPL  propose to (i) amend and  restate  the  existing  limited  partnership
agreement of NOARK,  (ii)  contribute  additional  assets into NOARK,  including
without  limitation,  all ownership interests of AWP, all ownership interests of
EIT, the assets of NGSC and the Searcy Gathering Assets and (iii) create limited
liability  companies  involving  gas  marketing  activities  and  gas  gathering
activities, all to be wholly owned by NOARK.

         The  parties  propose to  participate  in the  ownership  of NOARK,  to
contribute  additional assets to NOARK, and to participate in various actions to
be taken by, and with  respect  to,  NOARK,  all to the extent set forth in this
Agreement and in accordance with and in the manner contemplated hereby.

         NOW,  THEREFORE,  in  consideration  of the  premises  and  the  mutual
covenants herein contained, the Parties agree as follows:

         1.       Definitions.  For purposes of this Agreement

         "Affiliate" or "Affiliates" means with respect to any Person, except as
         otherwise  provided  herein:  (i) any  person  or  entity  directly  or
         indirectly  controlling,  controlled or under common  control with such
         Person;  (ii) any person or entity  directly  or  indirectly  owning or
         controlling  ten  percent  (10%)  or  more  of the  outstanding  voting
         securities or ownership  interests of such Person;  (iii) any person or
         entity ten percent (10%) or more of whose outstanding voting

                                        1





         securities or ownership  interests are directly or indirectly  owned or
         controlled by such Person; (iv) any officer, director, partner, manager
         or member of a Person;  and (v) any  company for which a Person acts as
         an officer, director, partner, manager or member.

         "AWG" means Arkansas Western Gas Company, an Arkansas corporation,  all
         of the outstanding capital stock of which is owned by SWN.

         "AWP" means Arkansas Western Pipeline Company, an Arkansas corporation,
         all of the outstanding capital stock of which is owned by SWN.

         "AWP L.L.C."  means  Arkansas  Western  Pipeline  Company,  L.L.C.,  an
         Arkansas limited  liability  company,  into which AWP is proposed to be
         merged upon FERC approval thereof.

         "AWP Contribution Time" shall have the meaning set forth in Section 12
         (g)(xv).

         "Closing"  means the date and time for the execution of the amended and
         restated  partnership  agreement of NOARK by SWPL and EAPC, and for the
         contribution  of  various  assets  into NOARK as  contemplated  by this
         Agreement, and "Closing Date" means the date of the Closing.

         "Contribution Time" shall have the meaning set forth in Section 11(g).

         "EAPC"  means  Enogex  Arkansas  Pipeline   Corporation,   an  Oklahoma
         corporation, all of the capital stock of which is owned by Enogex Inc.

         "EAPC Permitted Liens" means (i) the terms,  conditions,  restrictions,
         exceptions,  reservations,  limitations and other matters  contained in
         any of the rights-of-way,  permits,  or documents under which the Ozark
         Pipeline  and/or the Searcy  Gathering  Assets are  located,  and other
         easements,  leases, permits or other conveyance instruments provided to
         SWPL by EAPC or which do not,  and will  not,  individually  and in the
         aggregate,  interfere materially with the continued ownership,  use and
         operation of the Ozark Pipeline and the Searcy Gathering Assets,  taken
         as a whole, in substantially the same manner as the same have been used
         by Ozark  and  Warren  Petroleum  Company,  L.P.;  (ii)  the  contracts
         acquired  under the Asset  Purchase  and Sale  Agreements  attached  as
         Exhibits "A" and "C";  (iii) liens for property  taxes and  assessments
         that are not yet due and  payable  (or if  delinquent,  that are  being
         contested  in good  faith by EIT,  Ozark or Warren  Petroleum  Company,
         L.P.,  as  applicable,   by  appropriate   legal   proceedings);   (iv)
         mechanics',  materialmen's,   repairmen's  and  other  statutory  liens
         arising in the  ordinary  course and which are not yet due and payable;
         (v) any  obligations or duties  affecting the Ozark Pipeline and/or the
         Searcy  Gathering  Assets as to any  governmental  authority  under any
         permit  and  all  applicable   laws,   rules  and  regulations  of  any
         governmental  authorities,  and all rights reserved to or vested in any
         governmental  authorities,  and all rights reserved to or vested in any
         governmental authority to control or regulate the Ozark Pipeline and/or
         the Searcy Gathering Assets or the

                                        2





         operation  thereof in any manner (other than in connection  with EIT's,
         Ozark's or Warren  Petroleum  Company,  L.P.'s  non-compliance  with or
         default under any such permit,  applicable laws, rules or regulations);
         (vi) utility  easements,  restrictive  covenants,  defects in title and
         irregularities, and other matters that (A) are of record (to the extent
         the same was indicated in the documents  provided or made  available by
         EAPC  to  SWPL)  or (B) do not and  will  not,  individually  or in the
         aggregate,  interfere materially with the continued ownership,  use and
         operation of the Ozark Pipeline and the Searcy  Gathering  Assets taken
         as a whole, in substantially  the same manner as same have been used by
         Ozark and Warren Petroleum  Company,  L.P. in the past; (vii) rights of
         priority  which may have been  acquired  by any third  party due to the
         fact that any of the  rights-of-way  or documents  conveying any of the
         property  rights to locate the Ozark Pipeline and the Searcy  Gathering
         Assets may not have been obtained or recorded in the appropriate county
         real estate records,  and (viii) matters with respect to which SWPL had
         actual knowledge prior to the execution hereof.

         "EIT" means Enogex Interstate Transmission, L.L.C., an Oklahoma limited
         liability  company  formed by EAPC to acquire  the  pipeline  assets of
         Ozark.

         "FERC" means the Federal Energy Regulatory Commission.

         "HSR Act" means the  Hart-Scott-Rodino  Antitrust  Improvements  Act of
         1976, as amended, and the rules and regulations promulgated thereunder.

         "Lien" means any lien,  mortgage,  pledge,  security interest,  charge,
         encroachment or encumbrance.

         "Material"  shall  mean  for  purposes  of  Sections  11 and 12 of this
         Agreement, unless the context requires another meaning, with respect to
         i) a material contract,  agreement or commitment, a contract, agreement
         or  commitment  involving,  or which  may  reasonably  be  expected  to
         involve,  the payment or receipt of more than  $25,000 in any one year,
         or $50,000 over its term, or which is not  cancelable  upon one month's
         notice without penalty, ii) a material claim,  breach,  demand or other
         action, a claim, breach,  demand or other action in which the amount in
         controversy  (or which may reasonably be expected to be in controversy)
         exceeds  $25,000 or in which, if adversely  determined,  the applicable
         Person's business activities (or any part thereof) could be enjoined or
         restricted,  iii) material  property or assets,  any property or assets
         having a value in excess of $25,000 and iv) a material breach, default,
         or violation of any applicable  laws,  rules or  regulation,  a breach,
         default  or  violation  in which  civil  or  criminal  penalties  could
         reasonably  be expected  to be imposed or in which,  if found to exist,
         the applicable Person's business activities (or any part thereof) could
         be enjoined or restricted.

         "NES L.L.C."  means NOARK Energy  Services,  L.L.C.,  the gas marketing
         limited  liability company to be formed by NOARK as an Oklahoma limited
         liability company.


                                        3





         "NGSC"  means  NOARK  Gas  Services   Company,   an  Arkansas   general
         partnership  formed on January 1, 1993 to i) acquire all of the assets,
         and to assume all the obligations and  liabilities,  of NGMC, and which
         did acquire and assume such assets,  liabilities and  obligations,  and
         ii)  provide   market   development,   marketing  and  other   business
         development services to NOARK.

         "NGMC" means NOARK Gas Marketing Company,  a Texas general  partnership
         formed on March 1, 1990, to provide market  development,  marketing and
         business  administration  services,  to  NOARK,  primarily  during  the
         construction of NOARK's pipeline system, all of the assets, obligations
         and liabilities of which have been conveyed to NGSC.

         "NOARK" means NOARK Pipeline System,  Limited Partnership,  an Arkansas
         limited  partnership,   all  of  the  outstanding  general  partnership
         interests of which are owned by SWPL and SEMCO,  and all of the limited
         partnership interests of which are owned by Prudential.

         "NOARK Debt" means (a) the debt incurred by NOARK pursuant to the terms
         of that certain  Credit  Agreement  and related  documents  dated as of
         February 26, 1993 among NOARK,  the Lenders and The First National Bank
         of  Chicago,  as Agent,  as  amended  by the First  Amendment  to NOARK
         Pipeline System, Limited Partnership Credit Agreement dated February 1,
         1994 and (b) the debt  incurred by NOARK  pursuant to the terms of that
         certain  Construction  Loan and Note  Purchase  Agreement  and  related
         documents dated as of October 10, 1991 and as amended by Amendments No.
         1 and No. 2 to the Construction Loan and Note Purchase  Agreement dated
         as of January 29, 1993,  and February 24, 1993,  respectively,  between
         NOARK and The Prudential Insurance Company of America.

         "NOARK Related Entity" means any Person which is wholly owned by NOARK.

         "Ozark" means Ozark Pipeline, Inc., a Delaware corporation,  which owns
         the Ozark pipeline system, located in Oklahoma and Arkansas.

         "Ozark Disclosure Schedule" means the schedule attached hereto as
         Schedule 11(g).

         "OGG  L.L.C."  means Ozark Gas  Gathering,  L.L.C.,  the gas  gathering
         limited  liability company to be formed by NOARK as an Oklahoma limited
         liability company.

         "Parties" means the parties to this Agreement.

         "Person" means any individual,  corporation, limited liability company,
         limited or general partnership, joint venture, association, joint stock
         company, trust,  unincorporated  organization,  governmental agency (or
         any department,  agency or political  subdivision thereof) or any other
         entity.

         "Pipeline" has the meaning set forth in Section 12(g)(iii).

                                        4





         "Prudential" means The Prudential Insurance Company of America, a New
         Jersey corporation.

         "Prudential Interest" means all of the limited partnership interests in
         NOARK, which interests are owned by Prudential.

         "Searcy Contribution Time" has the meaning in Section 11(h).

         "Searcy Disclosure Schedule" means the schedule attached hereto as 
         Schedule 11(h).

         "Searcy Gathering Assets" means those gas gathering facilities owned by
         Warren Petroleum Company,  L.P. which EAPC is negotiating to acquire as
         contemplated in Section 4 below.

         "SEMCO" means SEMCO Arkansas Pipeline Company, a Michigan  corporation,
         all of the outstanding  capital stock of which is owned by SEMCO Energy
         Ventures, Inc.

         "SEMCO Interest" means all of the general partnership interests in 
         NOARK owned by SEMCO.

         "SWN" means Southwestern Energy Company, an Arkansas corporation.

         "SWPL"  means  Southwestern   Energy  Pipeline  Company,   an  Arkansas
         corporation,  all of the outstanding capital stock of which is owned by
         SWN.

         "SWPL Interest"  means all of the partnership  interests in NOARK other
         than the Prudential Interest and the SEMCO Interest.

         "SWPL Permitted Liens" means (i) the terms,  conditions,  restrictions,
         exceptions,  reservations,  limitations and other matters  contained in
         any of  the  rights-of-way,  permits,  or  documents  under  which  the
         Pipeline  is located,  and other  easements,  leases,  permits or other
         conveyance  instruments  provided to EAPC by SWPL or which do not,  and
         will not, individually and in the aggregate,  interfere materially with
         the continued ownership,  use and operation of the Pipeline, taken as a
         whole, in  substantially  the same manner as the same have been used by
         NOARK or AWP, as applicable,  in the past; (ii) the contracts described
         on Schedule  12(g)(iv);  (iii) liens for property taxes and assessments
         that are not yet due and  payable  (or if  delinquent,  that are  being
         contested in good faith by NOARK or AWP, as applicable,  by appropriate
         legal  proceedings);  (iv) mechanics',  materialmen's,  repairmen's and
         other  statutory liens arising in the ordinary course and which are not
         yet due and  payable;  (v) any  obligations  or  duties  affecting  the
         Pipeline  as to any  governmental  authority  under any  permit and all
         applicable laws, rules and regulations of any governmental authorities,
         and all rights reserved to or vested in any  governmental  authorities,
         and all rights reserved to or vested in any  governmental  authority to
         control or regulate the Pipeline or the operation thereof in any manner
         (other  than in  connection  with NOARK or AWP  non-

                                       5


          compliance  with or default  under any such permit,  applicable  laws,
          rules or regulations); (vi) utility easements,  restrictive covenants,
          defects in title and irregularities, and other matters that (A) are of
          record (to the extent the same was indicated in the documents provided
          by SWPL to EAPC) or (B) do not and will  not,  individually  or in the
          aggregate,  interfere materially with the continued ownership, use and
          operation of the Pipeline, taken as a whole, in substantially the same
          manner as same have been used by NOARK or AWP, as  applicable,  in the
          past;  (vii)  rights of priority  which may have been  acquired by any
          third party due to the fact that any of the rights-of-way or documents
          conveying  any of the  property  rights to locate the Pipeline may not
          have been obtained or recorded in the  appropriate  county real estate
          records;  (viii)  matters  with  respect  to  which  EAPC  had  actual
          knowledge prior to the execution  hereof,  and (ix) Liens securing the
          NOARK Debt.

         "Third Person" means any Person other than SWN, SWPL, Enogex,  EAPC and
         NOARK and their respective Affiliates.

         2. Acquisition and Maintenance of Interests in NOARK.

                  (a) EAPC shall use its best reasonable efforts to acquire all 
         of the Prudential Interest.

                  (b) EAPC shall use its best reasonable  efforts to acquire all
         of the SEMCO Interest.

                  (c) SWPL shall  continue  to own,  and shall not dispose of or
         otherwise encumber,  except as otherwise  contemplated  hereunder,  the
         SWPL Interest prior to Closing.

                  (d)  SWPL   hereby   waives  all  rights  of  first   refusal,
         preferential purchase rights and all other rights it may have under the
         Limited  Partnership  Agreement,  dated as of October 10, 1991,  and as
         amended by  Amendment  No. 1 dated  February  24,  1993 (the  "Existing
         Agreement"),   of  the  NOARK  Pipeline  System,   Limited  Partnership
         regarding the acquisitions contemplated by Sections 2(a) and (b) above.

                  (e)  The  Parties  agree  that  the  events  and  transactions
         contemplated  hereunder  will not result in a termination  of NOARK for
         federal  income tax purposes or  otherwise.  However,  in the event any
         such  termination  is  deemed  to  have  occurred  under  the  Existing
         Agreement  by  reason  of  the  events  and  transactions  contemplated
         hereunder,  SWPL hereby  waives the  provisions  of Section 15.4 of the
         Existing Agreement.

          3.  Acquisition  of  Ozark.  EAPC  shall  cause  EIT to use  its  best
reasonable  efforts  to enter  into a  definitive  agreement  with Ozark for the
acquisition of all of the pipeline assets of Ozark and/or the purchase of all of
the outstanding capital stock of Ozark. In the event of the execution of such an
agreement, EAPC will also cause EIT, to use its best reasonable efforts to close
such  acquisition.  The Parties  recognize,  however,  that  certain  regulatory
authorizations as contemplated

                                        6





by Section 10 below will need to be obtained in order to close such acquisition.
Upon the closing of such acquisition,  EAPC shall contribute and assign to NOARK
all of the ownership  interest in EIT, and EAPC's capital account in NOARK shall
be credited  with an amount equal to all amounts paid by EIT for the purchase of
the Ozark pipeline system, or the stock of Ozark, as applicable,  plus the costs
incurred in obtaining the regulatory  authorizations  contemplated by Section 10
below. Nothing in this Agreement shall be construed to confer upon SWPL, SWN, or
NOARK  or their  respective  successors  and  assigns,  any  right,  benefit  or
obligation under such definitive agreement.  Such definitive agreement is in the
form of the Asset  Purchase and Sale Agreement  attached  hereto as Exhibit "A."
Upon the acquisition of such assets and the  contribution  of EIT to NOARK,  the
Parties agree that NOARK promptly will commence the interconnection of the NOARK
pipeline  system with the Ozark  pipeline  system and the expansion of the NOARK
and Ozark pipeline systems as specified in Exhibit J.

         4.  Acquisition  of Searcy  Gathering  Assets . EAPC shall use its best
reasonable  efforts to enter into a definitive  agreement with Warren  Petroleum
Company,  L.P. for the acquisition of the Searcy  Gathering  Assets described on
Exhibit  "B,"  attached  hereto  and  made a part  hereof.  In the  event of the
execution of such agreement,  EAPC will use its best reasonable efforts to close
such acquisition. Upon the closing of such acquisition, EAPC will, upon approval
by SWPL,  which approval shall not be  unreasonably  withheld,  contribute  such
Searcy  Gathering Assets to OGG L.L.C. and EAPC's capital account in NOARK shall
be credited with an amount equal to all amounts paid by EAPC for the purchase of
the Searcy  Gathering  Assets.  Nothing in this Agreement  shall be construed to
confer upon SWPL, SWN or NOARK, or their respective  successors and assigns, any
right,  benefit or obligation under such definitive  agreement.  Such definitive
agreement  shall be in a form  substantially  similar to the Asset  Purchase and
Sale  Agreement  attached  hereto  as  Exhibit  "C."  Further,  nothing  in this
Agreement will be construed to obligate NOARK, SWPL or SWN to accept or agree to
the  contribution  of the  Searcy  Gathering  Assets  unless  and until SWPL has
approved such contribution, which approval shall not be unreasonably withheld.

         5. NGSC.  There currently  exists various  disputes between SWN and its
Affiliates and SEMCO and its Affiliates regarding, among other matters, NGSC. On
or before the acquisition by EAPC of all of the SEMCO  Interests,  SWN, SWPL and
any  of  their  appropriate  Affiliates  shall  execute  a  Mutual  Release  and
Settlement  Agreement between SWN, SWPL and any of their appropriate  Affiliates
and  SEMCO  Energy,  Inc.  and any of its  appropriate  Affiliates,  in the form
attached hereto as Exhibit "D."

         6.  Acquisition  and Merger of AWP. SWN shall convey to SWPL all of the
capital stock of AWP, and SWPL shall cause AWP to be merged into AWP L.L.C.  The
Parties  recognize,  however,  that FERC  authorization may be required prior to
consummating  such merger.  Upon the Closing,  SWPL agrees to file with FERC for
such  authorization and to use its best reasonable  efforts to diligently pursue
and obtain such  authorization.  Such filing may be made in conjunction with the
filings  contemplated under Section 10, and the fees and expenses of such filing
shall be borne by EAPC.  Upon  receipt of such  authorization  from  FERC,  SWPL
agrees to cause AWP to be merged into AWP L.L.C., and immediately  thereafter to
contribute and assign all of the ownership  interests in AWP L.L.C. to NOARK. In
the event such FERC  authorization  is not  received by the closing of the Ozark
acquisition  contemplated  in Section 3 above,  then SWPL  shall  convey to EAPC
seventy-

                                       7



five  percent  (75%) of all  outstanding  capital stock of AWP, free and
clear of all Liens. Following such contribution or sale of stock, as applicable,
all of the assets of AWP L.L.C.,  or AWP, as  applicable,  shall be those assets
described on Exhibit "E." In the event of such purchase of seventy-five  percent
(75%) of AWP's  stock,  EAPC and SWPL  shall  contribute  all of AWP's  stock to
NOARK.  In addition,  within ten (10) days  following such  contribution  of the
ownership  interests of AWP L.L.C.  into NOARK,  or the  contribution  of all of
AWP's stock into NOARK,  as  applicable,  EAPC shall pay to SWPL  $1,575,000.00.
Upon such  contribution  and payment,  SWPL's capital  account in NOARK shall be
credited with  $525,000.00 and EAPC's capital account in NOARK shall be credited
with  $1,575,000.00,  as a result of the  contribution  of AWP L.L.C. or AWP, as
applicable, into NOARK.

         7.  Closing.  The  Closing  of the  transaction  contemplated  by  this
Agreement  shall take place at the  offices of Hall,  Estill,  Hardwick,  Gable,
Golden & Nelson, 320 S. Boston Ave., Suite 400, Tulsa, Oklahoma or at such other
place as may be agreed to by the  Parties.  Subject to the terms and  conditions
hereof, the following events will take place at the Closing:

                  (a) SWPL and EAPC  shall  execute  the  Amended  and  Restated
         Partnership  Agreement of NOARK in the form attached  hereto as Exhibit
         "F".

                  (b) SWPL shall  contribute and assign to (i) OGG L.L.C. all of
         the assets of NGSC, which assets are described on Exhibit "G," attached
         hereto and made a part hereof and (ii) NOARK all technical  information
         and  materials  obtained or produced in  conjunction  with a project to
         extend  the  pipeline  system  of NOARK  into  Oklahoma  as more  fully
         described on Schedule 7(b).

                  (c) SWPL and EAPC shall cause NOARK to form NES L.L.C. 
         and OGG L.L.C. by filing articles of organization and executing the 
         operating agreements in the forms attached hereto as Exhibits "H" and
         "I".  NES L.L.C. shall engage in marketing activities and OGG L.L.C. 
         shall engage in gathering activities.

                  (d) EAPC shall pay to SWPL $1,172,000.00.

                  (e) Each of the Parties  will  execute and deliver  such other
         documents as may be required to  accomplish  the items set forth in (a)
         through (c) above,  to confirm the  ownership  under (b) above,  and to
         confirm the  ownership in NOARK  immediately  prior to the execution of
         the Amended and Restated Partnership Agreement referenced in (a) above.

         8. Ownership in NOARK, and Status of Capital Accounts.

                  (a) Upon the Closing  referenced in Section 7 above, EAPC will
         elect to convert all of the Prudential  Interest to general partnership
         interests in NOARK  except for a one percent  (1%) limited  partnership
         interest in NOARK,  and the ownership  interests in NOARK shall then be
         as set forth in the  Amended  and  Restated  Partnership  Agreement  of
         NOARK,  the form of which is attached as Exhibit  "F." Such  conversion
         will be made by EAPC  executing  the  Election  to  Convert in the form
         attached hereto as Exhibit "K".

                                        8




                  (b) Upon the closing,  and following the contribution to NOARK
         of the assets  described  in Section  7(b) above,  the  balances of the
         Capital  Accounts  of SWPL and EAPC in NOARK  shall be as set  forth in
         Schedule  4.1 to the  Amended and  Restated  Partnership  Agreement  of
         NOARK,  the form of which is attached  hereto as Exhibit "F".  Further,
         these balances are also inclusive of the yield maintenance amounts paid
         by NOARK and funded by SEMCO and SWPL discussed in Section 9(c) below.

                  (c) Allocations of NOARK  partnership  income or loss to SEMCO
         will be based upon the actual  closing of books on the day its interest
         is sold to EAPC.

         9. NOARK Debt.

                  (a) The Parties  acknowledge that the execution of the Amended
         and Restated  Partnership  Agreement  of NOARK in the form  attached as
         Exhibit "F", and certain of the other actions  contemplated  under this
         Agreement,  require the consent of the lenders under the loan documents
         pursuant  to which  the  NOARK  Debt  described  under  item (a) of the
         definition of NOARK Debt was incurred.  Accordingly,  the Parties agree
         that the Closing shall not occur unless all such  consents  required to
         be obtained from such lenders are in fact obtained.

                  (b) The Parties acknowledge that all loans from SEMCO and SWPL
         to NOARK have been  converted  to capital  contributions  to NOARK.  As
         such, those loans are no longer in force or effect, and NOARK no longer
         has any  obligation  to repay such loans.  Further,  the  Parties  also
         acknowledge that the capital account balances set forth on Schedule 4.1
         to the Amended and Restated Partnership Agreement of NOARK, the form of
         which is attached  hereto as Exhibit "F",  reflect the inclusion of the
         conversion of such loans to capital contributions.

                  (c) The Parties  acknowledge that concurrent with the Closing,
         Enogex is making a loan to NOARK in an amount necessary to pay off that
         portion of the NOARK Debt  described in item (b) of the  definition  of
         NOARK Debt. The general terms of such loan from Enogex are described on
         Exhibit "L." The Parties  further  acknowledge  that (i) in  connection
         with the pay off of such portion of the NOARK Debt, NOARK is making the
         yield maintenance  payments to Prudential to enable the payment of such
         portion of the NOARK Debt and SEMCO and SWPL shall have  contributed to
         NOARK amounts equal to such yield maintenance  payments,  and ii) SEMCO
         and SWPL shall be entitled to any tax deductions or other benefits that
         may arise from the  respective  amounts each  contributed  to NOARK for
         such yield maintenance payments made by NOARK.

                  (d)  Concurrent  with  the  Closing,  EAPC  shall  assume  all
         obligations  of SEMCO  under that  portion of the NOARK Debt  described
         under item (a) of the definition of NOARK Debt.




                                        9





         10. FERC and HSR Applications.

                  (a) The Parties  recognize  and agree that as soon as possible
         following  Closing,  certain  regulatory  filings  will be  required in
         connection  with (i) EIT's  contemplated  acquisition  of the  pipeline
         assets  of  Ozark,  and  (ii)  the  subsequent   integration  of  those
         facilities with NOARK's  pipeline  facilities into a single  interstate
         natural gas transmission  system.  Those filings  include,  but are not
         limited to:

                  1.       An  Application  with the FERC under  Section 7(b) of
                           the Natural Gas Act for  permission  and  approval to
                           abandon the  pipeline  assets of Ozark by sale to EIT
                           (to be made by Ozark);

                  2.       An  Application  with the FERC under  Section 7(c) of
                           the  Natural  Gas Act  for a  Certificate  of  Public
                           Convenience and Necessity authorizing EIT to acquire,
                           own and  operate  jurisdictional  facilities  and for
                           certain Blanket  Authorizations  (to be made by EIT);
                           and

                  3.       An  Application  with the FERC under  Section 7(c) of
                           the  Natural  Gas Act  for a  Certificate  of  Public
                           Convenience   and   Necessity   authorizing   EIT  to
                           interconnect  with and to acquire,  own and integrate
                           into an existing  jurisdictional pipeline system, the
                           intrastate  pipeline facilities owned and operated by
                           NOARK  (to be  made  by EIT  possibly  as part of its
                           application for certificate  authorization to acquire
                           the Ozark system);

         The  Parties  and their  Affiliates  shall  provide  such  support  and
         assistance as EIT and NOARK may reasonably  request with respect to the
         above filings.

                  (b) The Parties  recognize that certain  filings under the HSR
         Act and the rules of the Federal Trade  Commission  will be required in
         connection with the acquisition by EIT of the pipeline assets of Ozark.
         The  Parties  and their  Affiliates  shall  provide  such  support  and
         assistance as EIT and NOARK may reasonably  request in conjunction with
         such filings and in responding to any requests for information from the
         Federal Trade Commission or the United States Department of Justice.

                  (c) EAPC agrees to make capital  contributions  to NOARK equal
         to all  amounts  paid or required  to be paid by NOARK  (including  any
         NOARK Related  Entity) for the  interconnection  of the NOARK  pipeline
         system with the Ozark pipeline  system,  and the expansion of the NOARK
         and Ozark  pipeline  systems as specified in Exhibit J attached  hereto
         which  interconnection  and expansion will not occur until after EAPC's
         contribution of the ownership interests in EIT to NOARK contemplated by
         Section 3 above. Such  contributions  shall be made by EAPC immediately
         prior to the time the amounts under this  subparagraph (c) are required
         to be paid by NOARK,  and shall be used by NOARK to make such payments.
         EAPC's  Capital  Account  under the  Amended and  Restated  Partnership
         Agreement  of NOARK  (the form of which is  attached  hereto)  shall be
         increased  by the  amount  of such  contributions  at the  time of such
         contributions.

                                        10





         11. Representations and Warranties of Enogex and EAPC. Enogex and EAPC,
jointly and severally, hereby represent and warrant as follows:

                  (a) Organization.  Enogex is a corporation duly  incorporated,
         validly  existing and in good  standing  under the laws of the State of
         Oklahoma  with full  corporate  power to carry on its  business  as now
         being  conducted.  EAPC is a  corporation  duly  incorporated,  validly
         existing and in good  standing  under the laws of the State of Oklahoma
         with  full  corporate  power  to  carry on its  business  as now  being
         conducted.

                  (b)  Power  and  Authority;   Enforceability.   Each  has  all
         requisite  corporate  power and authority to enter into this  Agreement
         and the other  documents  to be  entered  into by it at the  Closing as
         provided  for under  this  Agreement  and to  perform  its  obligations
         hereunder  and  thereunder.  This  Agreement  has been  and such  other
         documents will have been at the Closing duly  authorized,  executed and
         delivered  by  Enogex  and  EAPC,  and,  assuming  due   authorization,
         execution and delivery of the other Parties thereto,  constitute legal,
         valid and binding  obligations  enforceable  in  accordance  with their
         terms,  except that (i) such  enforcement may be limited by bankruptcy,
         insolvency,  reorganization,  moratorium or similar laws relating to or
         affecting  creditors'  rights generally and (ii) the remedy of specific
         performance  and injunction and other forms of equitable  relief may be
         subject to equitable defenses and to the discretion of the court before
         which any proceeding therefor may be brought.

                  (c) No Conflict with Other  Instruments  or Consents.  Neither
         the execution and delivery of this Agreement or the other  documents to
         be entered  into by Enogex or EAPC at the  Closing as  provided  for in
         this Agreement,  nor the consummation of the transactions  contemplated
         hereby or thereby (i) will  conflict  with or result in (or with giving
         of  notice or  passage  of time or both  would  result  in) a  material
         breach,  default or  violation of (A) any of the terms,  provisions  or
         conditions of their charters,  as amended, or bylaws, as amended or (B)
         any material agreement, document, instrument,  judgment, decree, order,
         governmental permit,  certificate or license to which either of them is
         a party  or to  which  either  of them is  subject  or by  which  their
         material  property is bound,  (ii) will  result in the  creation of any
         lien,  charge or other encumbrance on any of their material property or
         assets or (iii) will  require them to obtain the consent of any private
         nongovernmental  Third  Person,  except  for the  consent  of The First
         National Bank of Chicago required under the loan documents  referred to
         in item (a) of the definition of "NOARK Debt" in Section 1. No consent,
         action,  approval or authorization of, or registration,  declaration or
         filing with, any governmental department,  commission,  agency or other
         instrumentality  having jurisdiction over either of them is required by
         them to authorize the execution and delivery by them of this  Agreement
         or the other  documents  to be entered  into by them at the  Closing as
         provided  for in this  Agreement  or,  except  for  the  authorizations
         contemplated in Section 10 above,  the consummation of the transactions
         contemplated hereby and thereby.

                  (d) Accuracy of Representations  and Warranties.  All of their
         representations  and warranties  contained in this  Agreement  shall be
         true in all material respects at and as of the Closing,  and such other
         times as specifically set forth herein, as if such representations and

                                        11




         warranties were made at and as of the Closing and such other times, and
         they shall perform,  at or prior to the relevant Closing and such other
         times as  specifically  set forth herein,  all agreements and covenants
         required by this  Agreement  to be performed by them at or prior to the
         relevant Closing and such other times.

                  (e)  Litigation.   There  are  no  suits,   actions,   claims,
         proceedings   or   investigations   pending  or  to  their   knowledge,
         threatened,   seeking  to  prevent  or   challenge   the   transactions
         contemplated by this Agreement.

                  (f) NOARK Interests.  At the Closing,  EAPC shall,  subject to
         having  acquired  same as  contemplated  by Sections 2(a) and (b), have
         good title to the Prudential Interest and the SEMCO Interest,  free and
         clear of all Liens,  except for Liens  securing  the NOARK Debt and the
         Enogex loan referenced in Section 9(c) above.

                  (g) EIT  Interests.  At the  time of the  contribution  of the
         ownership interests in EIT to NOARK (the "Contribution Time"):

                           (i) The  principal  asset  of EIT  will be the  Ozark
                  pipeline  system which is more fully  described in Exhibit A-1
                  and  is  referred  to  hereinafter  sometimes  as  the  "Ozark
                  Pipeline."

                           (ii)  Except  as set  forth on the  Ozark  Disclosure
                  Schedule, no material claim, demand, filing,  hearing,  notice
                  of   violation,   proceeding,   notice   or   demand   letter,
                  investigation,  administrative proceeding,  civil, criminal or
                  other action,  suit or other legal  proceeding will be pending
                  or threatened, against EIT or EAPC relating to, resulting from
                  or affecting the ownership or operation of the Ozark Pipeline,
                  the  consequences of which,  individually or in the aggregate,
                  could  have a material  adverse  effect on NOARK or any of the
                  NOARK  Related  Entities.  Except  as set  forth on the  Ozark
                  Disclosure Schedule, no notice from any governmental authority
                  or any  other  person  (including  employees)  will  have been
                  received  by Enogex,  EAPC or EIT or to their  knowledge,  the
                  prior owner of the Ozark  Pipeline (or any affiliate  thereof)
                  as to any material claim, demand, filing,  hearing,  notice of
                  violation, proceeding, notice or demand letter, administrative
                  proceeding,  action,  civil,  criminal  or other suit or other
                  legal proceeding  relating to, resulting from or affecting the
                  ownership or operation of EIT or the Ozark Pipeline,  claiming
                  any material violation of any law, statute,  rule, regulation,
                  ordinance,  order  decision  or  decree  of  any  governmental
                  authority (including,  without limitation, any such law, rule,
                  regulation,  ordinance,  order,  decision or decree concerning
                  the  conservation  of  natural   resources)  or  claiming  any
                  material   breach  of  any  contract  or  agreement  with  any
                  third-party.

                           (iii)  Except as set  forth on the  Ozark  Disclosure
                  Schedule,  the Ozark Pipeline will have been and shall at such
                  time continue to be operated in material  compliance  with the
                  provisions and requirements of all laws,  rules,  regulations,
                  ordinances,  orders, decisions and decrees of all governmental
                  authorities  having  jurisdiction  with  respect  to the Ozark
                  Pipeline or the ownership or operation thereof.

                                       12





                  All  necessary  material  governmental  permits,  licenses and
                  other authorizations with regard to the ownership or operation
                  of the  Ozark  Pipeline  by EIT will have  been  obtained  and
                  maintained in effect; and no material violations or notices of
                  violations,  written  or  otherwise,  will exist in respect to
                  such permits, licenses or other authorizations.

                           (iv)  Except  as set  forth on the  Ozark  Disclosure
                  Schedule,  (i) all of the material  contracts,  agreements and
                  commitments  relating to the  ownership  and  operation of the
                  Ozark   Pipeline  shall  be  in  full  force  and  effect  and
                  enforceable in accordance with their terms, and (ii) EIT shall
                  not be in material breach of, or with the lapse of time or the
                  giving of notice, or both, would be in material breach of, any
                  of its material obligations thereunder.

                           (v) All material ad valorem, property and other taxes
                  based on the ownership of the Ozark Pipeline that are then due
                  and payable will have been properly and timely paid. Except as
                  set  forth on the  Ozark  Disclosure  Schedule,  all  material
                  amounts  payable  by EIT  under  the  terms  of the  contracts
                  described in (d) above will have been properly and timely paid
                  except for such amounts as are then being currently paid prior
                  to delinquency in the ordinary  course of business.  Except as
                  set  forth on the  Ozark  Disclosure  Schedule,  all  material
                  amounts then payable by  third-parties  under the terms of the
                  agreements described in (iv) above will be properly and timely
                  paid to EIT.

                           (vi) At the  Contribution  Time,  EIT shall have good
                  title to all of the Ozark  Pipeline and the other  properties,
                  contracts  and assets,  real and personal of EIT, all of which
                  will  then be free of all  Liens,  except  for (i)  liens  for
                  current  taxes  and  assessments  that  are  not  yet  due and
                  payable; (ii) mechanics', warehousemen's, landlords' and other
                  similar  statutory  liens securing the payment of amounts that
                  are not yet due and  payable  and (iii)  other EAPC  Permitted
                  Liens.

                           (vii)  To the  best of  EAPC's  knowledge  after  due
                  inquiry, the equipment related to the Ozark Pipeline will have
                  been maintained in satisfactory  operating  condition and will
                  be  capable  of  being  used  in the  operation  of the  Ozark
                  Pipeline  in the  manner  in which  it has  been  historically
                  operated without present need for repair or replacement except
                  in the ordinary course of business.

                           (viii)  Accurate and complete  copies of all material
                  leases, instruments, contracts, agreements, permits, licenses,
                  rights-of-ways, certificates and other documents in connection
                  with the transactions contemplated by this Agreement will have
                  been delivered or otherwise made available to NOARK and SWPL.

                           (ix) Environmental Compliance. Except as set forth on
                  the Ozark Disclosure Schedule:


                                       13





                           (a) EIT will  have  obtained  all  material  permits,
                  licenses and other  authorizations  ("Environmental  Permits")
                  relating to the Ozark Pipeline,  which are then required under
                  applicable  laws  relating to pollution or  protection  of the
                  environment, including laws relating to emissions, discharges,
                  releases or threatened  releases of pollutants,  contaminants,
                  or  hazardous  or toxic  materials or wastes into ambient air,
                  surface water, ground water, or land, or otherwise relating to
                  the manufacture,  processing,  distribution,  use,  treatment,
                  storage,  disposal,  transport,  or  handling  of  pollutants,
                  contaminants,  or hazardous or toxic  materials or wastes into
                  ambient air, surface water, ground water or land, or otherwise
                  relating to the manufacture,  processing,  distribution,  use,
                  treatment,   storage,  disposal,   transport  or  handling  of
                  pollutants,  contaminants  or hazardous or toxic  materials or
                  wastes (collectively, the "Environmental Laws").

                           (b) EIT and the Ozark  Pipeline  will be in  material
                  compliance with all terms and conditions of such Environmental
                  Permits   and  with  all  other   limitations,   restrictions,
                  conditions,     standards,     prohibitions,     requirements,
                  obligations,   schedules  and  timetables  contained  in  such
                  Environmental Laws or contained in any regulation, code, plan,
                  order,  decree,  judgment  or notice or demand  letter  from a
                  governmental entity issued,  entered,  promulgated or approved
                  thereunder  as  they  will  then  apply  to EIT  or the  Ozark
                  Pipeline.

                           (c) Enogex,  EAPC or EIT will not have  received  any
                  notification  from any  governmental  authority  or any  other
                  person that any of the current or former properties, assets or
                  operations  of EIT or the  Ozark  Pipeline  will then be in or
                  claimed  to  be  in  material   violation  of  any  applicable
                  Environmental Laws.

                           (d) There  will be no  material  civil,  criminal  or
                  administrative action, suit, demand, claim, hearing, notice of
                  violation, investigation,  proceeding, notice or demand letter
                  from a  governmental  entity  pending  or  threatened  against
                  Enogex,  EAPC  or  EIT  with  respect  to the  Ozark  Pipeline
                  claiming  a  violation   of,  or  any  probable  or  potential
                  violation of, any applicable Environmental Laws.

                           (e) To the best of their knowledge after due inquiry,
                  there  will  be  no  past  or  present   events,   conditions,
                  circumstances,  activities,  practices,  incidents, actions or
                  plans,   which  will  interfere  with,  or  prevent   material
                  compliance  or  continued   material   compliance   with,  the
                  Environmental Laws or with any regulation,  code, plan, order,
                  decree, judgment, injunction, notice or demand letter from any
                  governmental entity issued,  entered,  promulgated or approved
                  thereunder,  or which  will give rise to any legal  liability,
                  including,    without   limitation,    liability   under   the
                  Comprehensive   Environmental   Response,   Compensation   and
                  Liability  Act  ("CERCLA")  or similar state or local laws, or
                  otherwise form the basis of any claim,  action,  demand, suit,
                  proceeding,  hearing,  notice of violation,  or  investigation
                  which  would be  materially  adverse,  individually  or in the
                  aggregate, to EITbased on or

                                       14





                  resulting  from the conduct of the business of EIT,  including
                  the   ownership   and   operation   of  the  Ozark   Pipeline,
                  manufacture,   processing,   distribution,   use,   treatment,
                  storage,  disposal,  transport or handling,  or the  emission,
                  discharge, release or threatened release into the environment,
                  of any pollutant,  contaminant,  chemical, or industrial toxic
                  or  hazardous  material,  substance  or waste.  To the best of
                  their  knowledge  after due inquiry,  no release,  emission or
                  discharge into the environment of any hazardous  substance (as
                  that term is currently  defined under CERCLA or any applicable
                  analogous  state  law)  will  have  occurred  or will  then be
                  occurring  in  connection  with the conduct of the business of
                  EIT,  including  the  ownership  and  operation  of the  Ozark
                  Pipeline, as a result of which release, emission or discharge,
                  individually  or in the  aggregate,  there would be a material
                  adverse  affect on EIT. To the best of their  knowledge  after
                  due inquiry,  the real property then owned or leased by EIT or
                  upon which EIT will then have a  right-of-way  will contain no
                  spill,  deposit or discharge of any  hazardous  substance  (as
                  that  term is then  defined  under  CERCLA  or any  applicable
                  analogous  state law), as a result of which spill,  deposit or
                  discharge,  individually or in the aggregate, there would be a
                  material adverse effect on EIT or the Ozark Pipeline.

                           (x) All  material  taxes based  upon,  measured by or
                  imposed  with  respect to EIT or the prior  owner of the Ozark
                  Pipeline  (if EIT  acquires  the assets of the Ozark  Pipeline
                  System) which are  attributable to the period on or before the
                  Contribution  Time will have  been  paid or  deposited  to the
                  extent required to be so paid or deposited.

                           (xi) To the best of their  knowledge,  except  as set
                  forth  on  the  Ozark  Disclosure  Schedule  or in  the  Asset
                  Purchase and Sale Agreement  attached as Exhibit "A," EIT will
                  not  have  any  material  liabilities  or  obligations  of any
                  nature,  whether absolute,  accrued,  contingent or otherwise,
                  and   whether  due  or  to  become  due   (including   without
                  limitation,  any liability for taxes and interest,  penalty or
                  other  charges  payable with respect to any such  liability or
                  obligation).

                           (xii) At the  Contribution  Time, (i) EAPC shall have
                  good title to all of the ownership  interests in EIT, free and
                  clear of all Liens, and all of those ownership interests shall
                  be owned by EAPC  free and  clear of any  security  interests,
                  voting   trusts,   agreements,   proxies,   options  or  other
                  restrictions;  (ii) EIT will have no subsidiaries, no interest
                  in any  partnership  or joint venture and will not hold shares
                  of stock or other ownership interest in any corporation, trust
                  or other  Person;  and (iii)  there will be:  (a) no  existing
                  subscriptions, options, warrants, calls, commitments or rights
                  of any  character to purchase or otherwise  acquire any shares
                  of capital stock or other  securities or interests of EIT; and
                  (b) no contracts,  subscriptions,  options,  warrants,  calls,
                  commitments  or rights to purchase or otherwise  acquire,  any
                  securities or other  interests  that are  convertible  into or
                  exchangeable  for shares of capital stock or other  securities
                  or interests of EIT.


                                       15





                           (xiii) With  respect to the Asset  Purchase  and Sale
                  Agreement   attached   hereto  as   Exhibit   A  (the   "Ozark
                  Agreement"):

                                    (a) the  employees  of  Ozark  which  are to
                           become  employees of EIT under the terms of the Ozark
                           Agreement  shall,  prior  to or at  the  time  of the
                           contribution  of EIT to NOARK,  become  employees  of
                           EAPC (or one of its  Affiliates)  and EAPC (or one of
                           its  Affiliates)  shall bear,  without  reimbursement
                           from  NOARK,  all of the  cost  and  expense  of such
                           employees,  including  the  obligation  to  make  any
                           severance,  termination or other such payments to any
                           of such employees; provided, however, if EAPC (or any
                           of its Affiliates)  utilizes any of such employees in
                           providing  services  to NOARK  (including  any  NOARK
                           Related   Entity)  under  The  Amended  and  Restated
                           Partnership  Agreement  of  NOARK,  then the costs of
                           such  employees in providing  such services  shall be
                           reimbursed by NOARK in accordance with the Accounting
                           Procedures  attached  to such  Amended  and  Restated
                           Partnership Agreement.

                                    (b) EIT will not agree to any  allocation of
                           the  purchase  price  payable  under the terms of the
                           Ozark  Agreement   without  first  obtaining   SWPL's
                           agreement   with   or   approval   of  the   proposed
                           allocation,  which  agreement or approval will not be
                           unreasonably withheld;

                                    (c) Enogex shall be responsible for ensuring
                           that Natural Gas  Clearinghouse  ("NGC") fulfills its
                           obligations   under  that  certain  Imbalance  Makeup
                           Agreement, dated December 15, 1997;

                                    (d) at the  Contribution  Time,  Ozark  will
                           have   fully  and   completely   complied   with  the
                           compressor  overhaul schedule and planned maintenance
                           set forth on  Exhibit D of the  Ozark  Agreement  and
                           NOARK will not, from and after the Contribution Time,
                           bear or incur any cost or expense  to perform  any of
                           the  actions  with  respect  to  the  Ozark  Pipeline
                           required  to be  performed  by or at the  expense  of
                           Ozark on such  schedule  prior to the  closing of the
                           transactions contemplated by the Ozark Agreement.

                  (h)  Searcy  Gathering  Assets.  At the time  that the  Searcy
         Gathering  Assets are  contributed  to NOARK (the "Searcy  Contribution
         Time"):

                           (i)  Except  as set  forth on the  Searcy  Disclosure
                  Schedule, no material claim, demand, filing,  hearing,  notice
                  of   violation,   proceeding,   notice   or   demand   letter,
                  investigation,  administrative proceeding,  civil, criminal or
                  other action,  suit or other legal  proceeding will be pending
                  or  threatened,  against EAPC relating to,  resulting  from or
                  affecting the  ownership or operation of the Searcy  Gathering
                  Assets,  the  consequences  of which,  individually  or in the
                  aggregate, could have a

                                       16





                  materially adverse effect on NOARK or any of the NOARK Related
                  Entities.  No notice from any  governmental  authority  or any
                  other person (including  employees) will have been received by
                  Enogex,  EAPC or to its  knowledge,  the  prior  owner  of the
                  Searcy Gathering  Assets (or any affiliate  thereof) as to any
                  material claim, demand, filing,  hearing, notice of violation,
                  proceeding,    notice   or   demand   letter,   administrative
                  proceeding,  action,  civil,  criminal  or other suit or other
                  legal proceeding  relating to, resulting from or affecting the
                  ownership  or  operation  of  EAPC  pertaining  to the  Searcy
                  Gathering Assets,  claiming any material violation of any law,
                  statute, rule, regulation, ordinance, order decision or decree
                  of any governmental authority (including,  without limitation,
                  any such law, rule, regulation,  ordinance, order, decision or
                  decree  concerning  the  conservation  of  natural  resources)
                  pertaining  to the Searcy  Gathering  Assets or  claiming  any
                  material   breach  of  any  contract  or  agreement  with  any
                  third-party pertaining to the Searcy Gathering Assets.

                           (ii)  Except  as set forth on the  Searcy  Disclosure
                  Schedule, the Searcy Gathering Assets will have been and shall
                  be continuing to be operated,  in material compliance with the
                  provisions and requirements of all laws,  rules,  regulations,
                  ordinances,  orders, decisions and decrees of all governmental
                  authorities  having  jurisdiction  with  respect to the Searcy
                  Gathering  Assets or the ownership or operation  thereof.  All
                  necessary material  governmental  permits,  licenses and other
                  authorizations  with regard to the  ownership  or operation of
                  the Searcy  Gathering  Assets by EAPC will have been  obtained
                  and  maintained  in  effect;  and no  material  violations  or
                  notices of  violations,  written or  otherwise,  will exist in
                  respect to such permits, licenses or other authorizations.

                           (iii)  Except as set forth on the  Searcy  Disclosure
                  Schedule,  (i) all of the material  contracts,  agreements and
                  commitments  relating to the  ownership  and  operation of the
                  Searcy  Gathering Assets shall be in full force and effect and
                  enforceable  in  accordance  with their  terms,  and (ii) EAPC
                  shall not be in material  breach of, or with the lapse of time
                  or the giving of notice,  or both, would be in material breach
                  of, any of its material obligations thereunder.

                           (iv) All  material  ad  valorem,  property  and other
                  taxes based on the  ownership of the Searcy  Gathering  Assets
                  that are then due and  payable  will  have been  properly  and
                  timely  paid.  Except  as set forth on the  Searcy  Disclosure
                  Schedule, all material amounts payable by EAPC under the terms
                  of  the  contracts  described  in (c)  above  will  have  been
                  properly  and timely paid except for such  amounts as are then
                  being  currently  paid prior to  delinquency  in the  ordinary
                  course  of  business.  Except  as  set  forth  on  the  Searcy
                  Disclosure  Schedule,  all  material  amounts  then payable by
                  third parties under the terms of the  agreements  described in
                  (iii) above will be properly and timely paid to EAPC.



                                       17





                           (v) At the Searcy  Contribution Time, EAPC shall have
                  good title to all of the Searcy  Gathering  Assets free of all
                  Liens,  except for (i) liens for current taxes and assessments
                  that   are  not  yet  due  and   payable;   (ii)   mechanics',
                  warehousemen's,  landlords' and other similar  statutory liens
                  securing  the  payment  of  amounts  that  are not yet due and
                  payable and (iii) other EAPC Permitted Liens.

                           (vi)  To the  best  of  EAPC's  knowledge  after  due
                  inquiry,  the equipment related to the Searcy Gathering Assets
                  will have been maintained in satisfactory  operating condition
                  and will be  capable  of being  used in the  operation  of the
                  Searcy  Gathering  Assets  in the  manner in which it has been
                  historically  operated  without  present  need for  repair  or
                  replacement except in the ordinary course of business.

                           (vii)  Accurate and  complete  copies of all material
                  leases, instruments, contracts, agreements, permits, licenses,
                  rights-of-ways, certificates and other documents in connection
                  with the transactions contemplated by this Agreement will have
                  been delivered or otherwise made available to NOARK and SWPL.

                           (viii) Environmental Compliance.  Except as set forth
                  on the Searcy Disclosure Schedule:

                           (a) EAPC will have obtained all Environmental Permits
                  relating  to the  Searcy  Gathering  Assets,  which  are  then
                  required under any applicable Environmental Laws.

                           (b) EAPC and the Searcy  Gathering  Assets will be in
                  material  compliance  with all  terms and  conditions  of such
                  Environmental   Permits   and  with  all  other   limitations,
                  restrictions,     conditions,     standards,     prohibitions,
                  requirements,  obligations, schedules and timetables contained
                  in such  Environmental  Laws or contained  in any  regulation,
                  code, plan, order, decree, judgment or notice or demand letter
                  from a  governmental  entity issued,  entered,  promulgated or
                  approved  thereunder  as they will then  apply to EAPC and the
                  Searcy Gathering Assets.

                           (c)  Enogex  or  EAPC  will  not  have  received  any
                  notification  from any  governmental  authority  or any  other
                  person that any of the current or former properties, assets or
                  operations of EAPC pertaining to the Searcy  Gathering  Assets
                  or the Searcy  Gathering  Assets will then be in or claimed to
                  be in material violation of any applicable Environmental Laws.

                           (d) There  will be no  material  civil,  criminal  or
                  administrative action, suit, demand, claim, hearing, notice of
                  violation, investigation,  proceeding, notice or demand letter
                  from a governmental  entity pending or threatened against EAPC
                  with  respect  to  the  Searcy  Gathering  Assets  claiming  a
                  violation  of, or any probable or potential  violation of, any
                  applicable Environmental Laws.

                                       18





                           (e) To the best of their knowledge after due inquiry,
                  there  will  be  no  past  or  present   events,   conditions,
                  circumstances,  activities,  practices,  incidents, actions or
                  plans,   which  will  interfere  with,  or  prevent   material
                  compliance  or  continued   material   compliance   with,  the
                  Environmental Laws or with any regulation,  code, plan, order,
                  decree, judgment, injunction, notice or demand letter from any
                  governmental entity issued,  entered,  promulgated or approved
                  thereunder,  or which  will give rise to any legal  liability,
                  including,  without  limitation,  liability  under  CERCLA  or
                  similar  state or local laws,  or otherwise  form the basis of
                  any claim, action, demand, suit, proceeding,  hearing,  notice
                  of  violation,  or  investigation  which  would be  materially
                  adverse,  individually  or in the  aggregate,  to  EAPC or the
                  Searcy Gathering Assets based on or resulting from the conduct
                  of the  business of EAPC as it pertains to the  ownership  and
                  operation of the Searcy  Gathering  Assets or the manufacture,
                  processing,  distribution,  use, treatment, storage, disposal,
                  transport or handling, or the emission,  discharge, release or
                  threatened  release into the  environment,  of any  pollutant,
                  contaminant,   chemical,  or  industrial  toxic  or  hazardous
                  material, substance or waste from the Searcy Gathering Assets.
                  To the best of their knowledge after due inquiry,  no release,
                  emission or discharge  into the  environment  of any hazardous
                  substance  (as that term is currently  defined under CERCLA or
                  any applicable analogous state law) will have occurred or will
                  then be  occurring  in  connection  with  the  conduct  of the
                  business of EAPC as it pertains to the ownership and operation
                  of the Searcy Gathering  Assets, as a result of which release,
                  emission or discharge, individually or in the aggregate, there
                  would be a  material  adverse  affect on EAPC.  To the best of
                  their  knowledge  after due inquiry,  the real  property  then
                  owned or leased by EAPC  pertaining  to the  Searcy  Gathering
                  Assets  or upon  which  EAPC  will  then  have a  right-of-way
                  pertaining  to the Searcy  Gathering  Assets  will  contain no
                  spill,  deposit or discharge of any  hazardous  substance  (as
                  that  term is then  defined  under  CERCLA  or any  applicable
                  analogous  state law), as a result of which spill,  deposit or
                  discharge,  individually or in the aggregate, there would be a
                  material  adverse  effect  on  EAPC  or the  Searcy  Gathering
                  Assets.

                           (ix) All  material  taxes based upon,  measured by or
                  imposed  with  respect  to  EAPC   pertaining  to  the  Searcy
                  Gathering  Assets or the prior  owner of the Searcy  Gathering
                  Assets which are  attributable  to the period on or before the
                  Searcy  Contribution  Time will have been paid or deposited to
                  the extent required to be so paid or deposited.

                           (x) To the best of  their  knowledge,  except  as set
                  forth  on the  Searcy  Disclosure  Schedule,  or in the  Asset
                  Purchase and Sale Agreement attached as Exhibit "C," EAPC will
                  not have any material liabilities or obligations pertaining to
                  the Searcy Gathering Assets of any nature,  whether  absolute,
                  accrued, contingent or otherwise, and whether due or to become
                  due (including without limitation, any liability for taxes and
                  interest, penalty or other charges payable with respect to any

                                       19





                  such liability or obligation).

                  (i) Brokers.  They have not  employed,  directly or indirectly
         for their  benefit,  any broker or finder or incurred any liability for
         any financial  advisory fees,  brokerage fees,  commissions or finders'
         fees, and no broker or finder has acted directly or indirectly for them
         in  connection  with this  Agreement or the  transactions  contemplated
         hereby.

                  (j)  Material  Fact.  To  the  best  of  their  knowledge,  no
         representation  or warranty in this  Section  11,  contains  any untrue
         statement of a material  fact or omits to state any material fact which
         is necessary to make any of the  representations  and  warranties  made
         herein,  in light of the  circumstances  in which  they are  made,  not
         misleading.

                  (k) No Reliance.  Except as to the  representations  of SWN or
         SWPL  expressly set forth in Section 12 of this  Agreement,  Enogex and
         EAPC   have  not   relied   upon  any  oral  or   written   statements,
         representations, or warranties which may have been made by or on behalf
         of SWN or SWPL or upon any written  reports,  financial  or  production
         data, business plans, projections,  forecasts, projections of feedstock
         availability  or evaluations,  or any  environmental  reports,  audits,
         studies or assessments, or any other written materials, copies of which
         may have been furnished to Enogex or EAPC or as to which Enogex or EAPC
         may have been  provided  access  in  connection  with the  transactions
         contemplated by this Agreement.  TO THE EXTENT THAT ENOGEX OR EAPC HAVE
         BEEN  FURNISHED  COPIES  OF OR  BEEN  PROVIDED  ACCESS  TO  ANY  OF THE
         FOREGOING,  ENOGEX AND EAPC  ACKNOWLEDGE THAT NEITHER SWN, SWPL NOR ANY
         OF THEIR AFFILIATES,  OR ANY OF THEIR RESPECTIVE  OFFICERS,  DIRECTORS,
         EMPLOYEES,  REPRESENTATIVES  AND AGENTS, HAS MADE, AND HEREBY EXPRESSLY
         DISCLAIM,  ANY  REPRESENTATIONS  OR  WARRANTIES  AS TO THE  ACCURACY OR
         COMPLETENESS OF SUCH INFORMATION, DATA OR MATERIALS (WHETHER WRITTEN OR
         ORAL)  WHICH  MAY  HAVE  BEEN  FURNISHED  TO  ENOGEX  OR EAPC OR  THEIR
         REPRESENTATIVES  OR AGENTS BY OR ON BEHALF OF SWN OR SWPL IN CONNECTION
         WITH THE TRANSACTIONS CONTEMPLATED HEREBY.

         12.  Representations  and  Warranties  of SWN and  SWPL.  SWN and SWPL,
jointly and severally, hereby represent and warrant as follows:

                  (a)  Organization.  SWN is a  corporation  duly  incorporated,
         validly  existing and in good  standing  under the laws of the State of
         Arkansas  with full  corporate  power to carry on its  business  as now
         being  conducted.  SWPL is a  corporation  duly  incorporated,  validly
         existing and in good  standing  under the laws of the State of Arkansas
         with  full  corporate  power  to  carry on its  business  as now  being
         conducted.

                  (b)  Power  and  Authority;   Enforceability.   Each  has  all
         requisite  corporate  power and authority to enter into this  Agreement
         and the other documents to be entered into by it

                                       20





         at the Closing as provided for under this  Agreement and to perform its
         obligations hereunder and thereunder.  This Agreement has been and such
         other documents will have been at the Closing duly authorized, executed
         and  delivered  by SWN  and  SWPL,  and,  assuming  due  authorization,
         execution and delivery of the other Parties thereto,  constitute legal,
         valid and binding  obligations  enforceable  in  accordance  with their
         terms,  except that (i) such  enforcement may be limited by bankruptcy,
         insolvency,  reorganization,  moratorium or similar laws relating to or
         affecting  creditors'  rights generally and (ii) the remedy of specific
         performance  and injunction and other forms of equitable  relief may be
         subject to equitable defenses and to the discretion of the court before
         which any proceeding therefor may be brought.

                  (c) No Conflict with Other  Instruments  or Consents.  Neither
         the execution and delivery of this Agreement or the other  documents to
         be entered  into by SWN or SWPL at the Closing as provided  for in this
         Agreement, nor the consummation of the transactions contemplated hereby
         or  thereby  (i) will  conflict  with or result  in (or with  giving of
         notice or passage of time or both would  result in) a material  breach,
         default or violation of (A) any of the terms,  provisions or conditions
         of their  charters,  as  amended,  or  bylaws,  as  amended  or (B) any
         material agreement,  document,  instrument,  judgment,  decree,  order,
         governmental  permit,  certificate  or license to which either of them,
         NOARK  or AWP is a party or to which  either  of them,  NOARK or AWP is
         subject or by which their NOARK's or AWP's material  property is bound,
         (ii)  will  result  in  the  creation  of any  lien,  charge  or  other
         encumbrance on any of their  material  property or assets or (iii) will
         require  them,  NOARK  or AWP to  obtain  the  consent  of any  private
         nongovernmental  Third  Person,  except  for the  consent  of The First
         National Bank of Chicago required under the loan documents  referred to
         in item (a) of the definition of "NOARK Debt" in Section 1. No consent,
         action,  approval or authorization of, or registration,  declaration or
         filing with, any governmental department,  commission,  agency or other
         instrumentality  having  jurisdiction over either of them, NOARK or AWP
         is  required  by them,  NOARK or AWP to  authorize  the  execution  and
         delivery by them of this Agreement or the other documents to be entered
         into by them at the  Closing  as  provided  for in this  Agreement  or,
         except for the  authorizations  contemplated in Section 6 and 10 above,
         the consummation of the transactions contemplated hereby and thereby.

                  (d) Accuracy of Representations  and Warranties.  All of their
         representations  and warranties  contained in this  Agreement  shall be
         true in all  material  respects at and as of the Closing and such other
         times as specifically set forth herein as if such  representations  and
         warranties were made at and as of the Closing and such other times, and
         they shall perform,  at or prior to the relevant Closing and such other
         times as  specifically  set forth herein,  all agreements and covenants
         required by this  Agreement  to be performed by them at or prior to the
         relevant Closing and such other times.

                  (e)  Litigation.   There  are  no  suits,   actions,   claims,
         proceedings   or   investigations   pending  or  to  their   knowledge,
         threatened,   seeking  to  prevent  or   challenge   the   transactions
         contemplated by this Agreement.

                                       21






                  (f) NOARK  Interests.  At the  Closing,  SWPL  shall have good
         title to the SWPL  Interest,  free and clear of all  Liens,  except for
         Liens securing the NOARK Debt and the Enogex loan referenced in Section
         9(c) above.

                  (g) NOARK and AWP  Operations.  With respect to the activities
         and operations of NOARK and AWP:

                           (i)  SWPL  has  been  the  managing  partner  and the
                  operator  of NOARK since its  in-service  date and SWN was the
                  managing partner of NOARK Pipeline System, an Arkansas general
                  partnership,  from its creation until its termination. AWG has
                  been the  operator of AWP since its  creation and was and will
                  be the  operator  of AWP,  and its  related  assets,  from its
                  creation until it is merged into AWP L.L.C.

                           (ii)  There are not now,  and never  have  been,  any
                  employees of NOARK or AWP and there are no  "employee  benefit
                  plans"  (as  such  term  is  defined  in  Section  3(3) of the
                  Employment  Retirement  Income Security Act of 1974) sponsored
                  by, maintained by or to which NOARK or AWP have contributed).

                           (iii)  The  principal  asset of  NOARK  is the  NOARK
                  Pipeline  System  which is more fully  described  on  Schedule
                  12(g)(iii), and the principal asset of AWP is the AWP Pipeline
                  System which is more fully described on Schedule 12(g)(iii) as
                  well.  The NOARK Pipeline  System and the AWP Pipeline  System
                  are herein referred to as the "Pipeline."

                           (iv) Schedule  12(g)(iv)  attached  hereto contains a
                  complete  and  accurate   list  of  all  material   contracts,
                  agreements  and  commitments  to which NOARK or AWP, or any of
                  their assets,  are bound,  including,  but not limited to: (a)
                  any  agreement  with  SWPL or any of its  Affiliates;  (b) any
                  material  gas  transportation  agreements;  (c)  any  material
                  agreement  currently in effect with a general  contractor  for
                  the  construction  of any of the  Pipeline;  (d) any agreement
                  with any lender;  (e) any material agreement to sell, lease or
                  otherwise  dispose of any  interest in any of NOARK's or AWP's
                  assets; (f) any material operating  agreement or operating and
                  maintenance  agreement  of NOARK or AWP;  and (g) any contract
                  that has a significant  impact on the Pipeline,  NOARK, AWP or
                  any of their assets.

                           (v) Except as  described  on  Schedule  12(g)(v),  no
                  material claim, demand, filing,  hearing, notice of violation,
                  proceeding,    notice   or   demand   letter,   investigation,
                  administrative  proceeding,  civil,  criminal or other action,
                  suit or other  legal  proceeding  is  pending  or  threatened,
                  against  NOARK,  AWP or SWPL  relating to,  resulting  from or
                  affecting the ownership or operation of the Pipeline, NOARK or
                  AWP, no notice from any  governmental  authority  or any other
                  person (including

                                       22





                  employees)  has been received by SWPL,  NOARK or AWP as to any
                  material claim, demand, filing,  hearing, notice of violation,
                  proceeding,    notice   or   demand   letter,   administrative
                  proceeding,  action,  civil,  criminal  or other suit or other
                  legal proceeding  relating to, resulting from or affecting the
                  ownership or operation of NOARK, AWP or the Pipeline, claiming
                  any material violation of any law, statute,  rule, regulation,
                  ordinance,  order  decision  or  decree  of  any  governmental
                  authority (including,  without limitation, any such law, rule,
                  regulation,  ordinance,  order,  decision or decree concerning
                  the  conservation  of  natural   resources)  or  claiming  any
                  material  breach of any contract or  agreement  with any third
                  party.

                           (vi)  NOARK,  AWP  and the  Pipeline  have  been  and
                  currently  are  operated,  and NOARK and AWP and the  Pipeline
                  are,  in  material   compliance   with  the   provisions   and
                  requirements  of all  laws,  rules,  regulations,  ordinances,
                  orders,  decisions and decrees of all governmental authorities
                  having jurisdiction with respect to the Pipeline, NOARK or AWP
                  or the ownership or operation thereof.  All necessary material
                  governmental  permits,  licenses and other authorizations with
                  regard to the  ownership or operation of the Pipeline by NOARK
                  or AWP have been  obtained and  maintained  in effect;  and no
                  material  violations  or  notices  of  violations,  written or
                  otherwise, exist in respect to such permits, licenses or other
                  authorizations.

                           (vii)  All of the  contracts  described  in  Schedule
                  12(g)(iv)  attached  hereto  are in full  force and effect and
                  enforceable in accordance with their terms, and neither SWPL ,
                  NOARK nor AWP is in  material  breach of, or with the lapse of
                  time or the giving of notice,  or both,  would be in  material
                  breach of, any of its obligations thereunder.

                           (viii) All  material ad valorem,  property  and other
                  taxes based on the ownership of the assets of NOARK or AWP and
                  the Pipeline  that are due and payable have been  properly and
                  timely paid.  All material  amounts  payable by either  NOARK,
                  AWP,  or SWPL under the terms of the  contracts  described  in
                  Schedule  12(g)(iv)  attached  hereto have been  properly  and
                  timely  paid except for such  expenses as are being  currently
                  paid prior to delinquency in the ordinary  course of business.
                  All material  amounts payable by third parties under the terms
                  of the  agreements  described  on Schedule  12(g)(iv)  of this
                  Agreement are being properly and timely paid to SWPL, NOARK or
                  AWP, as the case may be.

                           (ix)  NOARK  shall  have  good  title  to  the  NOARK
                  Pipeline  System at the  Closing  and AWP  L.L.C.  or AWP,  as
                  applicable,  shall have good title to the AWP Pipeline  System
                  at the  AWP  Contribution  Time  and  their  other  respective
                  properties,  contracts and assets,  real and personal,  all of
                  which  are,  or shall be, as  applicable,  free of all  Liens,
                  except for (a) Liens  listed on  Schedule  12(g)(ix)  attached
                  hereto;  (b) liens for current taxes and assessments  that are
                  not yet due and payable;  and (c) mechanics',  warehousemen's,
                  landlords' and other similar statutory liens securing

                                       23





                  the payment of amounts that are not yet due and payable and
                  (d) other Permitted Liens.

                           (x)  To  the  best  of  SWPL's  knowledge  after  due
                  inquiry,  the  equipment  related  to the  Pipeline  has  been
                  maintained in satisfactory  operating condition and is capable
                  of being used in the  operation  of the Pipeline in the manner
                  in which it has been  historically  operated  without  present
                  need for repair or replacement  except in the ordinary  course
                  of business.

                           (xi)  Accurate  and  complete  copies of all material
                  leases, instruments, contracts, agreements, permits, licenses,
                  rights-of-ways, certificates and other documents in connection
                  with the transactions contemplated by this Agreement have been
                  delivered or otherwise made available to Enogex and EAPC.

                           (xii) SWPL has delivered to Enogex and EAPC copies of
                  the   following   financial   statements   of  NOARK  and  AWP
                  (collectively   referred   to   herein   as   the   "Financial
                  Statements");

                                    (a)     The   audited   (as  to  NOARK)  and
                                            unaudited (as to AWP) Balance Sheets
                                            dated as of December 31, 1996.

                                    (b)     The   audited   (as  to  NOARK)  and
                                            unaudited   (as   to   AWP)   Income
                                            Statements for the fiscal year ended
                                            December 31, 1996.

                                    (c)     The  unaudited  Statements  of  cash
                                            flow  for  the  fiscal  years  ended
                                            December 31, 1996, December 31, 1995
                                            and December
                                            31, 1994.

                                    (d)     The   audited   (as  to  NOARK)  and
                                            unaudited (as to AWP) Balance Sheets
                                            as of December 31, 1995 and December
                                            31,  1994,  and the  audited  (as to
                                            NOARK) and the unaudited (as to AWP)
                                            Income  Statements  for  the  fiscal
                                            years  ended  December  31, 1995 and
                                            December 31, 1994.

                  The  books  and  records  of NOARK  and AWP have been kept and
                  maintained  in  accordance  with the FERC  uniform  system  of
                  accounts.  The  Financial  Statements  have been  prepared  in
                  accordance  with  generally  accepted  accounting   principles
                  consistently  applied and the FERC uniform system of accounts,
                  as applicable,  except as noted therein, and fairly present in
                  all material respects (i) the financial  position of NOARK and
                  AWP,  as  applicable,  as of the  respective  dates  set forth
                  therein and (ii) the results of the  operations and cash flows
                  of NOARK and AWP, as  applicable,  for the fiscal  periods set
                  forth therein.

                                       24





                           (xiii)  Except as described on Schedule  12(g)(xiii),
                  since December 31, 1996, in the aggregate,  there have been no
                  material  adverse  changes in (a) the assets,  liabilities  or
                  financial  condition  of  NOARK  or AWP or (b)  the  business,
                  financial conditions or results of operations of NOARK or AWP.

                           (xiv)    Environmental Compliance.

                           (a) NOARK and AWP have obtained all material permits,
                  licenses and other  authorizations  ("Environmental  Permits")
                  relating to NOARK,  AWP and the  Pipeline,  which are required
                  under  applicable  laws relating to pollution or protection of
                  the   environment,   including  laws  relating  to  emissions,
                  discharges,  releases or  threatened  releases of  pollutants,
                  contaminants,  or hazardous or toxic  materials or wastes into
                  ambient  air,  surface  water,   ground  water,  or  land,  or
                  otherwise    relating   to   the   manufacture,    processing,
                  distribution, use, treatment, storage, disposal, transport, or
                  handling of  pollutants,  contaminants,  or hazardous or toxic
                  materials or wastes into ambient air,  surface  water,  ground
                  water or  land,  or  otherwise  relating  to the  manufacture,
                  processing,  distribution,  use, treatment, storage, disposal,
                  transport or handling of pollutants, contaminants or hazardous
                  or toxic materials or wastes (collectively, the "Environmental
                  Laws").

                           (b)  NOARK,  AWP and  the  Pipeline  are in  material
                  compliance with all terms and conditions of such Environmental
                  Permits   and  with  all  other   limitations,   restrictions,
                  conditions,     standards,     prohibitions,     requirements,
                  obligations,   schedules  and  timetables  contained  in  such
                  Environmental Laws or contained in any regulation, code, plan,
                  order,  decree,  judgment  or notice or demand  letter  from a
                  governmental entity issued,  entered,  promulgated or approved
                  thereunder as they apply to NOARK, AWP or the Pipeline.

                           (c)  SWPL,   NOARK  or  AWP  has  not   received  any
                  notification  from any  governmental  authority  or any  other
                  person,  nor does SWPL have  knowledge that any of the current
                  or former properties, assets or operations of NOARK or AWP are
                  in or claimed to be in material  violation  of any  applicable
                  Environmental Laws.

                           (d)  There  is  no   material   civil,   criminal  or
                  administrative action, suit, demand, claim, hearing, notice of
                  violation, investigation,  proceeding, notice or demand letter
                  from a governmental  entity  pending or, to SWPL's  knowledge,
                  threatened  against NOARK, AWP or SWPL, with respect to NOARK,
                  AWP or the Pipeline  claiming a violation  of, or any probable
                  or potential violation of, any applicable Environmental Laws.

                           (e)  To  the  best  of  their  knowledge,  after  due
                  inquiry,  there  are no past or  present  events,  conditions,
                  circumstances,  activities,  practices,  incidents, actions or
                  plans,   which  will  interfere  with,  or  prevent   material
                  compliance or continued material

                                       25





                  compliance   with,   the   Environmental   Laws  or  with  any
                  regulation,  code, plan, order, decree, judgment,  injunction,
                  notice or demand letter from any  governmental  entity issued,
                  entered,  promulgated  or approved  thereunder,  or which will
                  give  rise  to  any  legal   liability,   including,   without
                  limitation,  liability under the  Comprehensive  Environmental
                  Response, Compensation and Liability Act ("CERCLA") or similar
                  state or local laws, or otherwise form the basis of any claim,
                  action,   demand,  suit,   proceeding,   hearing,   notice  of
                  violation,  or investigation which would be materially adverse
                  to SWPL,  NOARK,  AWP or the  Pipeline,  based on or resulting
                  from the conduct of the  business  of NOARK or AWP,  including
                  the  ownership  and  operation of the  Pipeline,  manufacture,
                  processing,  distribution,  use, treatment, storage, disposal,
                  transport or handling, or the emission,  discharge, release or
                  threatened  release into the  environment,  of any  pollutant,
                  contaminant,   chemical,  or  industrial  toxic  or  hazardous
                  material,  substance or waste. To the best of their knowledge,
                  after due inquiry, no release,  emission or discharge into the
                  environment  of any  hazardous  substance  (as  that  term  is
                  currently  defined  under CERCLA or any  applicable  analogous
                  state  law)  has  occurred  or  is   currently   occurring  in
                  connection  with the conduct of the  business of NOARK or AWP,
                  including the  ownership  and operation of the Pipeline,  as a
                  result of which release,  emission, or discharge,  there would
                  be a material  adverse  effect on SWPL,  NOARK or AWP.  To the
                  best of SWPL's knowledge, the real property currently owned or
                  leased  by  NOARK  and AWP or upon  which  NOARK  or AWP has a
                  right-of-way  contains no spill,  deposit or  discharge of any
                  hazardous  substance (as that term is currently  defined under
                  CERCLA or any applicable  analogous state law), as a result of
                  which spill,  deposit or discharge,  there would be a material
                  adverse effect on SWPL, NOARK, AWP or the Pipeline.

                           (xv) All  material  taxes based upon,  measured by or
                  imposed with respect to NOARK or AWP which are attributable to
                  the period on or before the Closing  Date,  or with respect to
                  AWP or AWP L.L.C.,  as applicable,  which are  attributable to
                  the period on or before the date AWP is  contributed  to NOARK
                  or AWP is merged into AWP L.L.C.  and contributed to NOARK, as
                  applicable,  (in  either  case the "AWP  Contribution  Time"),
                  respectively,  have been or will be paid or deposited,  to the
                  extent  required to be so paid or deposited,  or accruals (for
                  taxes not yet due and owing based on a good faith  estimate of
                  the taxes  anticipated  to be owed) will have been made on the
                  books of NOARK,  AWP and/or AWP L.L.C.,  as applicable and all
                  returns,  statements  and reports  with  respect to such taxes
                  which are  required to be filed on or before the Closing  Date
                  or in the case of AWP or AWP L.L.C.,  as  applicable,  the AWP
                  Contribution  Time have been (or will have been by the Closing
                  Date or in the case of AWP or AWP L.L.C.,  as  applicable,  by
                  the AWP  Contribution  Time) filed.  All tax returns  filed by
                  NOARK or AWP on or before the Closing, and also in the case of
                  AWP that will have been  filed  prior to the AWP  Contribution
                  Time,  constitute,  or will constitute,  complete and accurate
                  representations  of their tax  liabilities  for such years and
                  accurately set forth or will set forth all material items

                                       26





                  (to the extent  required to be included or  reflected  in such
                  returns)  relevant to their future tax liabilities,  including
                  the tax basis of their material properties and assets.  Except
                  as set forth on Schedule  12(g)(xv),  none of SWPL, NOARK, nor
                  AWP has  waived or  extended,  or in the case of AWP will have
                  waived  or  extended  at  the  AWP   Contribution   Time,  any
                  applicable  statute of limitations  relating to the assessment
                  of federal,  state, local or foreign taxes. Except as provided
                  in Schedule  12(g)(xv) no examinations of the federal,  state,
                  local or foreign tax returns of NOARK or AWP are  currently in
                  progress  nor,  in the  case of AWP or AWP  L.L.C.  will be in
                  progress  at the AWP  Contribution  Time  nor,  to the best of
                  SWPL's knowledge,  is or will be any such examination  noticed
                  or threatened. No material issue or issues have been raised in
                  connection  with any prior or pending  review or audit of said
                  federal,  state,  local or foreign  tax  returns  which may be
                  expected to be raised in the future by such taxing authorities
                  in  connection  with the audit or review of the tax returns of
                  NOARK,  AWP or AWP L.L.C.  AWP or AWP L.L.C. is not a party to
                  any tax sharing or similar agreement,  and it has no liability
                  for taxes of any other corporation.

                           (xvi) An election  under  Section 754 of the Internal
                  Revenue Code, as amended,  has not been made by NOARK, AWP nor
                  AWP L.L.C.

                           (xvii) NOARK is an Arkansas limited partnership, duly
                  formed,  validly  existing and in good standing under the laws
                  of the  State  of  Arkansas  with  full  power to carry on its
                  business as now being conducted.

                           (xviii)  NOARK is, and has been  since its  creation,
                  treated as a limited  partnership for all purposes under state
                  and federal tax laws, rules and regulations.

                           (xix)  Except  as set forth in  Schedule  12(g)(xix),
                  there are no patents, franchises,  trademarks,  service marks,
                  licenses,  copyrights,  trade  secrets (as defined in 78 Okla.
                  Stat.  ss.  86) or other  assets  of the  same  types as those
                  enumerated  above  which  are  used  in the  operation  of the
                  businesses  of NOARK  or AWP.  NOARK  and AWP are in  material
                  compliance   with  all  such  items  set  forth  in   Schedule
                  12(g)(xix). To the best of their knowledge, after due inquiry,
                  the  conduct  of the  businesses  of  NOARK  and AWP  does not
                  conflict   with,   infringe   upon  or  violate  the  patents,
                  franchises,  trademarks,  service  marks,  processes,  process
                  technology  or copyrights  or other  intangible  assets of any
                  other person or entity.

                           (xx)  To the  best  of  their  knowledge,  after  due
                  inquiry, all material receivables of NOARK, AWP and AWP L.L.C.
                  are fully collectible.

                           (xxi) To the best of their  knowledge,  neither NOARK
                  nor AWP has nor will AWP L.L.C. or AWP, as applicable,  at the
                  AWP  Contribution  Time  have,  any  material  liabilities  or
                  obligations  of  any  nature,   whether   absolute,   accrued,
                  contingent  or  otherwise,  and  whether  due or to become due
                  (including without limitation, any

                                       27





                  liability  for taxes and  interest,  penalty or other  charges
                  payable  with  respect to any such  liability  or  obligation)
                  which  are  not  disclosed  in the  Financial  Statements,  or
                  elsewhere  in  this   Agreement  or  the   Schedules  to  this
                  Agreement.


         For purposes of this Section 12(g), all  representations  regarding AWP
         shall be deemed made at the Closing and all such representations  shall
         be deemed to be applicable  to AWP L.L.C.  and made with respect to AWP
         L.L.C. at the AWP Contribution Time.

                  (h) At the  Closing  SWN shall  have good  title to all of the
         stock of AWP free and clear of all Liens,  and at the AWP  Contribution
         Time,  SWPL shall have good title to all of the ownership  interests in
         AWP  L.L.C.,  or  twenty-five  percent  (25%) of the  stock of AWP,  as
         applicable, free and clear of all Liens. At the Closing with respect to
         AWP, and at the AWP  Contribution  Time with  respect to AWP L.L.C.  or
         AWP, as applicable,  all of these ownership interests shall be owned by
         SWN or SWPL, as applicable,  free and clear of any security  interests,
         voting trusts, agreements,  proxies, options or other restrictions.  At
         the Closing AWP will have and at the AWP Contribution  Time, AWP or AWP
         L.L.C., as applicable,  will have, no subsidiaries,  no interest in any
         partnership or joint venture and does not hold shares of stock or other
         ownership  interest in any corporation,  trust or other Person.  At the
         Closing  with  respect to AWP,  and at the AWP  Contribution  Time with
         respect  to AWP L.L.C.  or AWP,  as  applicable,  there will be: (a) no
         existing subscriptions, options, warrants, calls, commitments or rights
         of any character to purchase or otherwise acquire any shares of capital
         stock or other  securities  or interests  of AWP and/or AWP L.L.C.,  as
         applicable;  and (b) no contracts,  subscriptions,  options,  warrants,
         calls,  commitments  or rights to purchase or  otherwise  acquire,  any
         securities or other interests that are convertible into or exchangeable
         for shares of capital  stock or other  securities  or  interests of AWP
         and/or AWP L.L.C., as applicable.

                  (i) At the  Closing,  SWPL shall have good title to all of the
         assets to be  contributed  to OGG L.L.C.  under Section  7(b)(i) and to
         NOARK under Section 7(b)(ii) above, free and clear of all Liens.

                  (j) NGMC.  NGMC has been  terminated  and all of the assets of
         NGMC are now owned by NGSC.

                  (k) Brokers.  They have not  employed,  directly or indirectly
         for their  benefit,  any broker or finder or incurred any liability for
         any financial  advisory fees,  brokerage fees,  commissions or finders'
         fees, and no broker or finder has acted directly or indirectly for them
         in  connection  with this  Agreement or the  transactions  contemplated
         hereby.

                  (l)  Full  Disclosure.  To the  best of  their  knowledge,  no
         representation   or  warranty  in  this  Section  12   (including   the
         information in the Schedules attached to this Agreement),  contains any
         untrue statement of a material fact or omits to state any material fact
         which is

                                       28





         necessary  to  make  any of the  representations  and  warranties  made
         herein,  in light of the  circumstances  in which  they are  made,  not
         misleading.

                  (m) No Reliance.  Except as to the  representations  of Enogex
         and EAPC expressly set forth in Section 11 of this  Agreement,  SWN and
         SWPL   have  not   relied   upon  any  oral  or   written   statements,
         representations, warranties which may have been made by or on behalf of
         ENOGEX or EAPC or upon any written  reports,  financial  or  production
         data, business plans, projections,  forecasts, projections of feedstock
         availability  or evaluations,  or any  environmental  reports,  audits,
         studies or assessments, or any other written materials, copies of which
         may have been  furnished  to SWN or SWPL or as to which SWN or SWPL may
         have  been  provided  access  in  connection   with  the   transactions
         contemplated  by this  Agreement.  TO THE EXTENT  THAT SWN OR SWPL HAVE
         BEEN  FURNISHED  COPIES  OF OR  BEEN  PROVIDED  ACCESS  TO  ANY  OF THE
         FOREGOING,  SWN AND SWPL  ACKNOWLEDGE  THAT NEITHER ENOGEX NOR EAPC NOR
         ANY  OF  THEIR  AFFILIATES,   OR  ANY  OF  THEIR  RESPECTIVE  OFFICERS,
         DIRECTORS, EMPLOYEES, REPRESENTATIVES AND AGENTS, HAS MADE, AND SWN AND
         SWPL HEREBY EXPRESSLY DISCLAIM ANY  REPRESENTATIONS OR WARRANTIES AS TO
         THE ACCURACY OR  COMPLETENESS  OF SUCH  INFORMATION,  DATA OR MATERIALS
         (WHETHER WRITTEN OR ORAL) WHICH MAY HAVE BEEN FURNISHED TO SWN AND SWPL
         OR THEIR REPRESENTATIVES OR AGENTS BY OR ON BEHALF OF ENOGEX OR EAPC IN
         CONNECTION WITH THE TRANSACTIONS CONTEMPLATED HEREBY.

         13.      Expenses.

                  (a) Expenses of the Transaction.  Except as otherwise provided
         herein, each of the Parties shall bear their respective expenses, costs
         and fees  (including  attorneys' and  accountants'  fees) in connection
         with the transactions  contemplated hereby,  including the preparation,
         execution  and  delivery of this  Agreement  and  compliance  herewith,
         whether  or  not  the   transactions   contemplated   hereby  shall  be
         consummated.

                  (b) Partnership Expenses.  After the Closing, all of the costs
         and  expenses  of NOARK,  and the  entities  owned by  NOARK,  shall be
         handled  in  accordance  with  the  Amended  and  Restated  Partnership
         Agreement of NOARK attached as Exhibit "F," or as otherwise provided in
         this Agreement.

         14.      Conditions to Closing.

                  (a) Each Party.  The  obligations of the Parties to consummate
         the transactions contemplated hereby at the Closing shall be subject to
         the  fulfillment  on or prior to the Closing Date of the condition that
         the consummation of such  transactions  shall not have been restrained,
         enjoined  or  otherwise  prohibited  by any  order of any  governmental
         authority whether judicial or administrative.

                                       29





                  (b)  SWN  and  SWPL.  The  obligations  of  SWN  and  SWPL  to
         consummate  the actions  contemplated  hereby at the  Closing  shall be
         subject  to the  fulfillment  on or  prior to the  Closing  Date of the
         following conditions:

                           (i) The  representations and warranties of Enogex and
                  EAPC  contained  herein  will  be  accurate  in  all  material
                  respects   at  and  as  of  the   Closing   as   though   such
                  representations and warranties had been made at and as of such
                  Closing; all terms, covenants and conditions of this Agreement
                  to be  complied  with and  performed  by Enogex and EAPC at or
                  before the relevant  Closing will have been duly complied with
                  and performed;  and Enogex and EAPC will have delivered to SWN
                  and SWPL  certificates  in the form  attached  as Exhibit  "M"
                  dated as of the  Closing  and signed by the  President  or any
                  Vice President thereof to the foregoing effect.

                           (ii) EAPC shall have  acquired all of the  Prudential
                  Interest as contemplated by Section 2(a) above.

                           (iii)  EAPC  shall  have  acquired  all of the  SEMCO
                  Interest as contemplated by Section 2(b) above.

                           (iv)  EIT  shall  have   entered  into  a  definitive
                  agreement  to  acquire  the   pipeline   assets  of  Ozark  as
                  contemplated by Section 3 above.

                           (v) SEMCO  Energy,  Inc.  and any of its  appropriate
                  Affiliates   shall  have  executed  the  Mutual   Release  and
                  Settlement   Agreement   between   SWN,   SWPL  any  of  their
                  appropriate  Affiliates and SEMCO Energy,  Inc. and any of its
                  appropriate  Affiliates in the form attached hereto as Exhibit
                  "D."

                           (vi)  EAPC  shall  have   executed  the  Amended  and
                  Restated  Partnership  Agreement of NOARK in the form attached
                  hereto as Exhibit "F."

                           (vii)  NOARK  shall  have  entered  into  a new  loan
                  agreement with Enogex and shall have used the proceeds of such
                  loan to pay a portion  of the NOARK  Debt as  contemplated  by
                  Section 9(c).

                           (viii) The consents  required to be obtained from the
                  lenders of the NOARK Debt as  contemplated  by Section 9 shall
                  have been obtained.

         SWN and SWPL may waive any condition specified in this Section 14(b) if
         they execute a writing so stating at or prior to the Closing.

                  (c) Enogex  and EAPC.  The  obligations  of Enogex and EAPC to
         consummate  the actions  contemplated  hereby at the  Closing  shall be
         subject  to the  fulfillment  on or  prior to the  Closing  Date of the
         following conditions:

                                       30





                           (i) The  representations  and  warranties  of SWN and
                  SWPL  contained  herein  will  be  accurate  in  all  material
                  respects   at  and  as  of  the   Closing   as   though   such
                  representations and warranties had been made at and as of such
                  Closing; all terms, covenants and conditions of this Agreement
                  to be complied with and performed by SWN and SWPL at or before
                  the  relevant  Closing will have been duly  complied  with and
                  performed;  and SWN and SWPL will have delivered to Enogex and
                  EAPC certificates in the form attached as Exhibit "N" dated as
                  of the  Closing  and  signed  by  the  President  or any  Vice
                  President thereof to the foregoing effect.

                           (ii) EAPC shall have  acquired all of the  Prudential
                  Interest as contemplated by Section 2(a) above.

                           (iii)  EAPC  shall  have  acquired  all of the  SEMCO
                  Interest as contemplated by Section 2(b) above.

                           (iv)  EIT  shall  have   entered  into  a  definitive
                  agreement  to  acquire  the   pipeline   assets  of  Ozark  as
                  contemplated by Section 3 above.

                           (v) SWPL shall have  contributed all of the assets of
                  NGSC  specified on Exhibit  "G",  free and clear of all Liens,
                  except for SWPL Permitted Liens.

                           (vi) The  Mutual  Release  and  Settlement  Agreement
                  between SWN, SWPL, and any of their appropriate Affiliates and
                  SEMCO Energy,  Inc. and any of its  appropriate  Affiliates in
                  the form  attached  as  Exhibit  "D"  shall  have  been  fully
                  executed.

                           (vii) SWPL shall have contributed to NOARK all of the
                  items  described in Section  7(b)(ii)  above free and clear of
                  all Liens.

                           (viii)  SWPL  shall have  executed  the  Amended  and
                  Restated  Partnership  Agreement of NOARK in the form attached
                  hereto as Exhibit "F."

                           (ix)  NOARK  shall  have  entered  into  a  new  loan
                  agreement with Enogex and shall have used the proceeds of such
                  loan to pay a portion  of the NOARK  Debt as  contemplated  by
                  Section 9(c).

                           (x) The  consents  required to be  obtained  from the
                  lenders of the NOARK Debt as  contemplated  by Section 9 shall
                  have been obtained.

                           (xi)  SWPL  shall  continue  to own  all of the  SWPL
                  Interest as contemplated by Section 2(c) above.



                                       31





         Enogex and EAPC may waive any condition specified in this Section 14(c)
         if it executes a writing so stating at or prior to the Closing.

         15.      Indemnification.

                  15.1     SWN and SWPL Indemnity.

                  (a) SWN and  SWPL,  from and  after the  Closing  Date,  shall
         jointly  and  severally  indemnify  and hold  Enogex and EAPC and their
         Affiliates  (other than NOARK and any NOARK Related Entity),  and their
         respective  officers,  directors,   shareholders,   employees,  agents,
         representatives,  successors  and  assigns  (collectively  the  "Enogex
         Indemnified  Parties") harmless from and against and in respect of, and
         will reimburse the Enogex  Indemnified  Persons for any and all damage,
         loss, cost, claims, demands,  assessments,  judgments,  deficiencies or
         liability (whether based on contract,  tort, product liability,  strict
         liability or otherwise),  including  without  limitation all reasonable
         expenses (including  interest,  penalties,  attorneys' and accountants'
         fees and costs of investigation) net of any insurance proceeds received
         by reason of such damage,  loss, cost,  claims,  demands,  assessments,
         judgments,  deficiencies  as  provided in Section  15.3  (collectively,
         "Damages") incurred by any of the Enogex Indemnified Parties,  directly
         or   indirectly,   resulting   from   or   in   connection   with   any
         misrepresentation, breach of warranty or nonfulfillment of any covenant
         or  agreement  by or on the part of SWN and/or SWPL  hereunder  whether
         prior to or subsequent to the Closing.  Notwithstanding anything herein
         to the contrary,  for purposes of Section 15.1, the representations and
         warranties in Section 12(g) shall be read, construed and enforced as if
         there were no qualifications  or exceptions  therein as to knowledge or
         matters disclosed in the schedules to the Agreement referenced therein.

                  (b) SWN and  SWPL,  from and  after  the  Closing  Date  shall
         jointly and  severally  indemnify  and hold NOARK and any NOARK Related
         Entity  harmless from and against and in respect of and will  reimburse
         NOARK and any NOARK  Related  Entity for (i) 60% of any and all Damages
         incurred by NOARK and/or any of the NOARK  Related  Entities  resulting
         from claims of Third Persons  incurred by NOARK and/or any of the NOARK
         Related Entities directly or indirectly resulting from or in connection
         with the  ownership,  the  assets  or  operations  of NOARK  which  are
         attributable to the period prior to the Closing, regardless of the date
         actually incurred and (ii) any and all Damages resulting from claims of
         Third Persons,  SWN, SWPL, or their Affiliates (other than NOARK or any
         NOARK Related Entity) incurred by NOARK and/or any of the NOARK Related
         Entities  directly or indirectly  resulting from or in connection  with
         (x) AWP, AWP L.L.C. and/or their respective assets and operations which
         are  attributable  to the  period  prior to the AWP  Contribution  Time
         regardless  of the date  actually  incurred  and (y) the assets of NGSC
         which are  contributed  to NOARK  pursuant  to  Section  7(b),  and the
         operation  thereof,  which are  attributable to the period prior to the
         Closing, regardless of the date actually incurred.

                  (c)  The  Parties   acknowledge  and  agree  that  the  Enogex
         Indemnified Parties shall

                                       32





         not receive any double recovery of Damages under Section 15.1(a)and(b).

                  15.2     Enogex and EAPC Indemnity.

                  (a) Enogex and EAPC,  from and after the Closing  Date,  shall
         jointly  and  severally  indemnify  and hold  SWN and  SWPL  and  their
         Affiliates  (other than NOARK and any NOARK Related Entity),  and their
         respective  officers,  directors,   shareholders,   employees,  agents,
         representatives,   successors  and  assigns   (collectively   the  "SWN
         Indemnified  Parties") harmless from and against and in respect of, and
         will reimburse the SWN Indemnified  Parties for (a) any and all Damages
         incurred by any of the SWN Indemnified Parties, directly or indirectly,
         resulting from or in connection with any  misrepresentation,  breach of
         warranty or  nonfulfillment  of any  covenant or agreement by or on the
         part of Enogex and/or EAPC hereunder  whether prior to or subsequent to
         the  Closing.  Notwithstanding  anything  herein to the  contrary,  for
         purposes of Section 15.2, the representations and warranties in Section
         11(g) and (h) shall be read, construed and enforced as if there were no
         qualifications  or  exceptions  therein  as  to  knowledge  or  matters
         disclosed  in  the  Ozark  Disclosure  Schedule  or  Searcy  Disclosure
         Schedule.

                  (b) Enogex  and EAPC,  from and after the  Closing  Date shall
         jointly and  severally  indemnify  and hold NOARK and any NOARK Related
         Entity  harmless from and against and in respect of, and will reimburse
         NOARK and any NOARK  Related  Entity for (i) 40% of any and all Damages
         resulting from claims of Third Persons  incurred by NOARK and/or any of
         the NOARK Related Entities directly or indirectly  resulting from or in
         connection with the ownership,  the assets or operations of NOARK which
         are attributable to the period prior to the Closing,  regardless of the
         date  actually  incurred  and (ii) any and all Damages  resulting  from
         claims of Third Persons,  Enogex,  EAPC or their Affiliates (other than
         NOARK or any NOARK Related Entity)  incurred by NOARK and/or any of the
         NOARK  Related  Entities  directly or indirectly  resulting  from or in
         connection  with  (y)  the  Searcy  Gathering  Assets  which  are to be
         contributed  to NOARK  pursuant to Section 4 above,  and the  operation
         thereof,  which are  attributable  to the  period  prior to the  Searcy
         Contribution  Time regardless of the date actually incurred and (z) the
         pipeline assets of Ozark which are contributed to NOARK (as a result of
         the contribution of EIT to NOARK as contemplated in Section 3), and the
         operation  thereof,  which are  attributable to the period prior to the
         Contribution Time, regardless of the date actually incurred.

                  (c) The Parties acknowledge and agree that the SWN Indemnified
         Parties shall not receive any double  recovery of Damages under Section
         15.2(a) and (b).

                  15.3     Reimbursement for Recoveries by Indemnified Party.

                  (a) In any case where an indemnified party recovers from third
         parties  all or any part of any  amount  paid to it by an  indemnifying
         party  pursuant  to this  Section  15,  such  indemnified  party  shall
         promptly pay over to the indemnifying party the amount so recovered

                                       33





         (after deducting  therefrom the full amount of the expenses incurred by
         it in procuring  such recovery and any  additional  amounts owed to the
         indemnified party by the indemnifying party under this Agreement),  but
         not in  excess of any  amount  previously  so paid by the  indemnifying
         party.

                  (b)  The   indemnified   party  shall  be  obligated  to  file
         diligently  and in good faith any claim for Damages with any applicable
         insurer  prior to  collecting  an  indemnification  payment  under this
         Section 15. However,  an indemnified party shall be entitled to collect
         an  indemnification  payment under this Section 15 if such  indemnified
         party has not received  reimbursement from an applicable insurer within
         six months after it has given such insurer written notice of its claim.
         In such event,  the indemnified  party shall assign to the indemnifying
         party any and all rights against its insurers.

                  15.4 Third Person Claim. If a claim by a Person other than the
         Parties is made against one or more of the Enogex  Indemnified  Parties
         or the SWN Indemnified  Parties (the "Indemnified  Party"),  and if the
         Indemnified  Party intends to seek indemnity with respect thereto under
         this Section 15, the Indemnified  Party shall promptly notify the Party
         or Parties having an  indemnification  obligation  with respect to such
         claim (the "Indemnifying  Party") of such claim. The Indemnifying Party
         shall  have  15 days  after  receipt  of  such  notice  to  notify  the
         Indemnified  Party of its agreement to undertake,  conduct and control,
         through  counsel  of its  own  choosing  and at its  own  expense,  the
         settlement  or  defense  thereof,   and  the  Indemnified  Party  shall
         cooperate  with  the  Indemnifying   Party  in  connection   therewith;
         provided,  however,  that (a) the  Indemnifying  Party shall permit the
         Indemnified  Party to participate in such settlement or defense through
         counsel  chosen by the  Indemnified  Party,  provided that the fees and
         expenses of such counsel shall be borne by the Indemnified  Party,  and
         (b)  the  Indemnifying   Party  shall  promptly  assume  and  hold  the
         Indemnified  Party  harmless  from and  against  the full amount of any
         loss,   damage  or  expense  resulting   therefrom.   So  long  as  the
         Indemnifying  Party is  reasonably  contesting  any such  claim in good
         faith, the Indemnified Party shall not pay or settle any such claim, to
         the extent such claim is subject to the  indemnity  provisions  of this
         Section 15. If the  Indemnifying  Party does not notify the Indemnified
         Party  within 15 days  after the  receipt  of the  Indemnified  Party's
         notice of a claim of  indemnity  hereunder  that it elects to undertake
         the defense thereof, the Indemnified Party shall have the right to take
         over the defense of such claim and to contest, settle or compromise the
         claim but  shall not  thereby  waive  any right to  indemnity  therefor
         pursuant to this Agreement,  including without  limitation the right to
         reimbursement  for  all  fees,  costs  and  expenses  incurred  by  the
         Indemnified   Party   (including   attorneys'   fees   and   costs   of
         investigation)   in  such  defense  and  in  contesting,   settling  or
         compromising such claim. The Indemnifying  Party shall not, except with
         the consent of the  Indemnified  Party,  enter into any settlement that
         does not  include as an  unconditional  term  thereof the giving by the
         Person or Persons asserting such claim an unconditional  release to all
         Indemnified  Parties from all  liability  with respect to such claim or
         consent to entry of any judgment.



                                       34





                  15.5 Survival. All representations,  covenants, agreements and
         warranties  of the  Parties or any  authorized  representative  thereof
         contained  in  this  Agreement  or  in  any  certificate  delivered  in
         connection  herewith  shall be and  remain  in full  force  and  effect
         notwithstanding  any  investigation  made by or disclosure  made to any
         party hereto, whether before or after the date hereof and shall survive
         the execution and delivery of this Agreement and the Closing; provided,
         however,  the representations  and warranties  contained in Sections 11
         and 12 shall  only  survive  for a period of three  (3) years  from the
         Closing  Date and any claim  for  breach  of such  representations  and
         warranties  contained in Sections 11 and 12 must be asserted in writing
         during such three (3) year survival  period or shall be deemed  waived,
         except that the  representations  and  warranties  contained in Section
         12(g)(xv)  shall survive for the applicable  statute of limitations for
         the assessment or collection of any taxes.

                  15.6 Limitation on Liability for Breach of Representations and
         Warranties  Contained in Sections 11 and 12. Enogex and EAPC's  maximum
         aggregate liability to SWN and SWPL for breaches of representations and
         warranties  contained  in  Section  11 shall not  exceed  five  million
         dollars  ($5,000,000).  Similarly,  SWN and  SWPL's  maximum  aggregate
         liability  to  Enogex  and EAPC for  breaches  of  representations  and
         warranties  contained  in  Section  12 shall not  exceed  five  million
         dollars ($5,000,000).

         16. Brokers.  Regardless of whether any Closing shall occur, each Party
shall indemnify and hold harmless the other Parties from and against any and all
liability  for any brokers' or finders'  fees arising with respect to brokers or
finders  retained  or  engaged  by such  Party in  respect  of the  transactions
contemplated by this Agreement.

         17. Notices. Any notice, request, instruction,  correspondence or other
document to be given  hereunder by any Party to the others (herein  collectively
called  "Notice")  shall be in  writing  and  delivered  in person or by courier
service  requiring  acknowledgment of receipt of delivery or mailed by certified
mail,  postage  prepaid  and return  receipt  requested,  or by  telecopier,  as
follows:

         If to SWN, addressed to:

                  Southwestern Energy Company
                  1083 Sain Street
                  P.O. Box 1408
                  Fayetteville, Arkansas 72702-1408
                  Attention: Executive Vice President - Finance & Corporate 
                                                            Development
                  Facsimile No.: (501) 521-1147

         If to SWPL, addressed to:

                  Southwestern Energy Pipeline Company
                  c/o Southwestern Energy Services Company
                  2200 MidContinent Tower
                  401 S. Boston Ave.

                                       35





                  Tulsa, Oklahoma 74103
                  Attention: Senior Vice President
                  Facsimile No.: (918) 584-4222

                  with a copy to SWN if notice is to SWPL only

         If to Enogex, addressed to:

                  Enogex Inc.
                  600 Central Park Two
                  515 Central Park Drive
                  Oklahoma City, OK 73105
                  Attention: Roger Farrell
                  Facsimile No.: (405) 557-5205

                  with a copy to:

                  Enogex Inc.
                  600 Central Park Two
                  515 Central Park Drive
                  Oklahoma City, OK 73105
                  Attention: General Counsel
                  Facsimile No.: (405) 557-5205

         If to EAPC, addressed to:

                  Enogex Arkansas Pipeline Corporation
                  600 Central Park Two
                  515 Central Park Drive
                  Oklahoma City, OK 73105
                  Attention: President
                  Facsimile No.: (405) 557-5205

                  with a copy to Enogex if notice is to EAPC only

Notice given by personal  delivery or courier  service  shall be effective  upon
actual receipt.  Notice given by mail shall be effective five days after deposit
with the United  States  postal  service when sent by first class mail,  postage
prepaid.  Notice given by telecopier  shall be confirmed by  appropriate  answer
back  and  shall be  effective  upon  actual  receipt  if  received  during  the
recipient's  normal business hours, or at the beginning of the recipient's  next
business  day after  receipt  if not  received  during  the  recipient's  normal
business  hours.  All Notices by telecopier  shall be confirmed  promptly  after
transmission  in writing by certified mail or personal  delivery.  Any Party may
change  any  address  to which  Notice is to be given to it by giving  Notice as
provided above of such change of address.

                                       36





         18.  Public  Announcements.  The parties agree that prior to making any
public announcement or statement with respect to the transaction contemplated by
this Agreement, the party desiring to make such public announcement or statement
shall consult with the other parties hereto and obtain prior written approval of
the other parties hereto of the text of a public announcement or statement to be
made solely by the party proposing to make such announcement.  Nothing contained
in this Section  shall be  construed to require any party to obtain  approval of
the other parties hereto to disclose information with respect to the transaction
contemplated by this Agreement to any state or federal governmental authority or
agency to the extent  required by  applicable  law or by any  applicable  rules,
regulations   or  orders  of  any   governmental   authority  or  agency  having
jurisdiction or necessary to comply with disclosure requirements of the New York
Stock Exchange, NASDAQ or any applicable securities laws.

         19.      Dispute Resolution

         19.1 Invoking Procedure.  In the event of a dispute between the Parties
arising  out of or  related  to  this  Agreement  , any  Party  may  invoke  the
procedures  specified  in this  Section  by giving  written  notice to the other
Parties. Such written notice will describe briefly the nature of the dispute and
shall  identify an individual  with authority to settle the dispute on behalf of
that Party.  The Party  receiving  such  notice  shall have ten (10) days within
which to designate  an  individual  with  authority to settle the dispute on its
behalf and to give written notice to the other Parties of its  designation  (the
individuals so designated shall be referred to as the "Authorized Individuals").
In this regard, there shall be only one Authorized  Individual for SWN and SWPL,
and only one  Authorized  Individual  for  Enogex  and  EAPC.  Unless  otherwise
notified, i) the Authorized Individual of SWN and SWPL shall be the President of
SWN, and ii) the Authorized Individual of Enogex and EAPC shall be the President
of Enogex.

         19.2  Investigation.  The  Authorized  Individuals  shall make whatever
investigation each deems appropriate and promptly thereafter,  but no later than
thirty (30) days from the date of the original notice invoking these procedures,
shall commence discussions  concerning resolution of the dispute. If the dispute
has not been  resolved  within  sixty  (60) days  from the date of the  original
notice  invoking  these  procedures,  the  Parties  shall  submit  the matter to
Alternate Dispute Resolution (ADR) in accordance with the following procedure.

         19.3 Neutral.  The Parties shall have ten (10) days from the expiration
of the sixty (60) day period  referred to in Section  19.2,  or the agreement of
the Parties,  to submit the matter to ADR, whichever occurs first,  within which
to agree  upon a  mutually  acceptable  person  not  affiliated  with any  Party
("Neutral").  If no Neutral  has been  selected  within  that time  period,  the
Parties agree jointly to request the American Arbitration Association,  or other
mutually agreed-upon  organization,  to supply within ten (10) days a list of at
least three (3)  potential  Neutrals  with  qualifications  as  specified by the
Parties in the joint request.  Within seven (7) days of receipt of the list, the
Parties shall rank the proposed candidates independently,  exchange rankings and
select as the Neutral the individual who received the highest  combined  ranking
who is available to serve.



                                       37





         19.4  Schedule.  In  consultation  with the Neutral,  the Parties shall
designate  a  mutually  convenient  time  and  place  for the  ADR,  and  unless
circumstances  require  otherwise,  such time shall be not later than forty-five
(45) days after the selection of the Neutral.

         19.5 Discovery.  In the event any of the Parties have  substantial need
for  information  in the possession of any other Party or a need to take certain
limited depositions and/or production of principal documents in order to prepare
for the ADR, the Parties  shall attempt in good faith to agree on a plan for the
expeditious  exchange of such information.  Should they fail to reach agreement,
any  Party may  request a meeting  with the  Neutral  who shall  assist  them in
reaching an accommodation.

         19.6 Written Submission.  One week prior to the first scheduled session
of the ADR,  each Party shall  deliver to the Neutral and to the other Parties a
written  summary of its views on the matter in dispute.  The summary shall be no
longer than twenty (20) double-spaced pages unless the Parties agree otherwise.

         19.7  Representatives.  In the ADR, each Party shall be  represented by
the  Authorized  Individual  and by counsel.  In addition,  each Party may bring
additional   persons  as  necessary  to  respond  to  questions  or   contribute
information as needed. The number of such additional persons to be allowed shall
be  mutually  agreed by the  Parties  with the  assistance  of the  Neutral,  if
necessary.

         19.8 Structure. The Neutral is authorized to conduct joint and separate
meetings  with the Parties and to help the Parties  structure  whatever  form of
presentation  of the matter in dispute is most likely to facilitate  resolution.
Notwithstanding the form of the presentation, it is the intent of the Parties to
provide an opportunity  for their  Authorized  Individuals,  with or without the
assistance of counsel,  and with the  assistance of the Neutral,  to negotiate a
resolution of the matters in dispute.  In the event the Neutral  holds  separate
private caucuses with a Party, he or she shall keep confidential all information
learned  in  such  private  caucuses  unless  specifically  authorized  to  make
disclosure  of  the  information  to  the  other  Parties.  There  shall  be  no
stenographic, visual, or audio record made of the ADR.

         19.9  Mandatory.  The Parties  agree to  participate  in the ADR to its
conclusion  as  designated  by the  Neutral  and not to  terminate  negotiations
concerning  resolution  of the  matters in dispute  until at least two (2) weeks
thereafter. Each Party agrees not to commence arbitration or seek other remedies
prior to the conclusion of the two-week post-ADR  negotiation  period,  provided
that any Party may commence arbitration on any date after which the commencement
of litigation  could be barred by an  applicable  statute of  limitations  or in
order to request an injunction to prevent  irreparable  harm. In such event, the
Parties agree  (except as prohibited by court order) to continue to  participate
in the ADR to its conclusion.

         19.10 Fees. The fees of, and authorized  costs incurred by, the Neutral
shall be shared equally by the Parties.  The Neutral shall be  disqualified as a
witness,  consultant,  expert,  or  counsel  for any Party  with  respect to the
matters in dispute and any related matters.

         19.11    Later Proceedings.  The ADR is a compromise negotiation for 
purposes of the Federal Rules of Evidence and the Rules of Evidence of the State
of Oklahoma.  The entire procedure is

                                       38





confidential.  All conduct,  statements,  promises, offers, views, and opinions,
whether  oral or written,  made in the course of the ADR by any of the  Parties,
their agents,  employees,  representatives,  or other invitees to the ADR and by
the  Neutral,  who is the  parties'  joint  agent  for  the  purposes  of  these
compromise  negotiations,  are  confidential  and shall,  in addition  and where
appropriate,  be  deemed  to be  work  product  and  privileged.  Such  conduct,
statements,  promises,  offers, views, and opinions shall not be discoverable or
admissible for any purposes,  including impeachment,  in any litigation or other
proceeding  involving  the Parties and shall not be  disclosed  to anyone not an
agent,  employee,  expert,  witness,  or representative  for any of the Parties.
Evidence otherwise  discoverable or admissible is not excluded from discovery or
admission as a result of its use in the ADR.

         19.12    Arbitration.

                  (a) In the event the  Parties  are  unable  to  resolve  their
         dispute in accordance with the foregoing provisions of this Section 19,
         the dispute  shall be submitted to final and binding  arbitration.  The
         arbitration   shall  be  administered   by  the  American   Arbitration
         Association  ("AAA") in accordance  with, and in the following order of
         priority:  (i) the  terms of  these  arbitration  provisions;  (ii) the
         Commercial  Arbitration Rules of the AAA; (iii) the Federal Arbitration
         Act (Title 9 of the United  States  Code);  (iv) the  Oklahoma  Uniform
         Arbitration  Act (15 O.S. ss. 801, et seq.);  and (v) to the extent the
         foregoing are inapplicable,  unenforceable or invalid,  the laws of the
         State of Oklahoma. The validity and enforceability of these arbitration
         provisions  shall be determined  in  accordance  with the same order of
         priority.  In the event of any inconsistency  between these arbitration
         provisions and such rules and statutes,  these  arbitration  provisions
         shall  control.  Judgment upon any award  rendered  hereunder  shall be
         entered  in any court  having  jurisdiction  thereof,  and the  parties
         consent to the  jurisdiction of any state or federal court in Oklahoma.
         Commencement  of and  demand for  arbitration  shall be made by written
         notice  by  the  initiating   party   (claimant)  to  the  other  party
         (respondent)  which  contains a statement of the nature of the dispute,
         the amount involved and the relief or remedy sought ("Notice").

                  (b) The arbitration shall be conducted by a panel of three (3)
         arbitrators (the "Arbitration Panel").  Enogex and EAPC on the one hand
         and SWN and SWPL on the other,  will each nominate one (1)  arbitrator,
         who is  experienced  and  knowledgeable  in the areas  involved  in the
         dispute,  within ten (10) working  days of their  receipt of the Notice
         that arbitration has been demanded and commenced,  and each will notify
         the other party of the name of its selected arbitrator within that same
         time period. If either side refuses to name an arbitrator,  application
         will be made to the Chief Judge of the United States District Court for
         the  Northern  District  of  Oklahoma  requesting  that the Chief Judge
         appoint  an  arbitrator.  If  the  Chief  Judge  declines  to  name  an
         arbitrator,  application  will be made to the AAA. The two  arbitrators
         thus  selected  will confer within ten (10) working days of their final
         selection and agree upon a third arbitrator. If the two arbitrators are
         unable to agree on a third arbitrator within sixty (60) working days of
         their first contact, the nomination of the third arbitrator will follow
         the same procedure as the nomination of a party  arbitrator for a party
         refusing  to make a  selection.  AAA  Rules  regarding  the  selection,
         qualification,  and  challenge  of  arbitrator  shall only apply to the
         second or third arbitrators if those arbitrators

                                       39





         are  selected  by the AAA.  No member of the  Arbitration  Panel may be
         involved  in the  controversy,  be or have been an  officer,  director,
         representative,  employee  or agent of or for either  party.  The third
         arbitrator shall act as Chairman of the Arbitration Panel.

                  (c) The  costs  and fees of the  arbitrators  selected  by the
         parties shall be borne by the party selecting such  arbitrator,  unless
         otherwise  awarded  by  the  Arbitration  Panel.  The  costs  and  fees
         attributable  to the third  arbitrator  shall be shared  equally by the
         parties, unless otherwise awarded by the Arbitration Panel.

                  (d) The Arbitration Panel may engage engineers, accountants or
         other  consultants that the Arbitration Panel deems necessary to render
         a  decision  in the  Arbitration  Proceeding.  All  fees  of  any  such
         consultants  shall be borne  equally by the parties,  unless  otherwise
         awarded by the Arbitration Panel.

                  (e)  The   arbitration   will  be   governed  by  the  Federal
         Arbitration  Act, 9 U.S.C.  ss.ss.  9 et seq. and the Oklahoma  Uniform
         Arbitration Act, 15 Okla. Stat. ss.ss. 801 et seq. The arbitrators will
         establish a schedule that will result in a final  arbitration  award to
         be  rendered  in  written  form not later than 180 days  following  the
         appointment of the third arbitrator. The place of the arbitration shall
         be Tulsa, Oklahoma.

                  (f) The parties agree that  pre-arbitration  hearing discovery
         is necessary.  Within twenty (20) working days after the appointment of
         the  third  arbitrator,  the  parties  agree to  exchange  lists of the
         witnesses  and  exhibits  each  then  plans  to  call  and  use  in the
         Arbitration Hearing. Within twenty (20) working days after the exchange
         of the witness and exhibit  lists,  the parties may request  additional
         discovery, if any is necessary, from the other party. The parties agree
         to respond to any such additional  request for documents from the other
         party within thirty (30) days after  receiving  such request,  and each
         agrees  to  attempt  in good  faith  to  schedule  the  depositions  of
         witnesses requested by the other side by agreement.  If the parties are
         unable to agree on any aspect of discovery  requested,  such  discovery
         issue shall be presented to and resolved by the Arbitration Panel.

                  (g) Any dispute  relating to or arising under this arbitration
         provision,  including  interpretation  thereof,  shall  be  solely  and
         finally resolved by submission to the Arbitration Panel.

                  (h) A written  decision by two (2) of the arbitrators  will be
         final and binding on the parties.  An arbitration  award entered herein
         can be confirmed by any party in the United States  District Courts for
         the Northern or Western  Districts of Oklahoma or the Western  District
         of Arkansas or any state district courts for the States of Oklahoma and
         Arkansas, and a judgment may be entered on the arbitration award by the
         same court.

                  (i)  Punitive  damages  may not be awarded by the  Arbitration
         Panel. The Arbitration  Panel shall have the power to award recovery to
         the  prevailing  party  of  all or  part  of its  costs,  expenses  and
         attorneys' fees incurred in conjunction with such Arbitration

                                       40




         Proceeding.

                  (j) The parties,  their  Affiliates,  employees,  contractors,
         attorneys  and  auditors  shall keep the  substance  of these final and
         binding arbitration proceedings  confidential to the extent the same is
         permissible,  consistent  with the  responsibilities  of the  attorneys
         under the pertinent Codes of Professional Responsibility or obligations
         which may  reasonably  require  disclosure  to financial  institutions,
         consultants for evaluation purposes or as may be ordered by the federal
         or state  government  or a court of  competent  jurisdiction.  Under no
         circumstances  shall any documents  memorializing  the substance of any
         aspect of these  proceedings  be disclosed or released to the newspaper
         or other media absent the mutual agreement of the parties.  The parties
         will use all  reasonable  efforts to obtain  protective  orders  before
         disclosing  any  terms of these  proceedings  to any  federal  or state
         government or a court of competent jurisdiction.

                  (k) Except for the  internal  costs of each party,  all costs,
         fees and  expenses of any portion of this  dispute  resolution  process
         shall be shared  equally by the  parties,  unless  otherwise  specified
         herein.

         20.  Governing  Law.  The  provisions  of this  Agreement  and,  unless
specifically  otherwise  provided in the document delivered pursuant hereto, the
documents  delivered  pursuant  hereto  shall be governed by and  construed  and
enforced in  accordance  with the laws of the State of Oklahoma,  excluding  any
conflicts-of-law  rule or principle that might refer same to the laws of another
jurisdiction.

         21.  Amendments and Waivers.  No supplement,  modification or waiver of
this Agreement  shall be binding  unless  executed in writing by the Party to be
bound thereby.  The failure of a Party to exercise any right or remedy shall not
be  deemed or  constitute  a waiver of such  right or remedy in the  future.  No
waiver  of any of the  provisions  of this  Agreement  shall be  deemed or shall
constitute  a waiver of any other  provision  hereof,  nor shall any such waiver
constitute a continuing waiver unless otherwise expressly provided.

         22. Binding Effect;  Non-Assignability and Alienation of Benefits. This
Agreement  shall be binding  upon and inure to the  benefit of the  Parties  and
their respective  permitted  successors and assigns;  but neither this Agreement
nor any of the rights,  benefits or obligations  hereunder shall be assigned, by
operation of law or otherwise, by any Party without the prior written consent of
the others. Nothing in this Agreement, express or implied, is intended to confer
upon any Person other than the Parties and their respective permitted successors
and assigns, any rights, benefits or obligations hereunder.

         23.  Severability.  If one or more of the provisions  contained in this
Agreement or in any other  document  delivered  pursuant  hereto shall,  for any
reason,  be held to be invalid,  illegal or unenforceable  in any respect,  such
invalidity, illegality or unenforceability shall not affect any other provisions
of this Agreement or any other such document.


                                       41






         24. Headings and Exhibits.  The headings of the several Sections herein
are inserted for convenience of reference only and are not intended to be a part
or to affect the meaning or interpretation  of this Agreement.  The Exhibits and
Schedules referred to herein are attached hereto and incorporated herein by this
reference.

         25.  Construction.  This Agreement was drafted  jointly by the Parties,
and no presumption shall operate in favor of or against any Party as a result of
any  responsibility  that any Party may have had for drafting this  Agreement or
any part thereof.

         26.  Multiple  Counterparts.  This  Agreement may be executed in one or
more counterparts,  each of which shall be deemed an original,  but all of which
together shall constitute one and the same instrument.

         IN WITNESS  WHEREOF,  SWPL,  SWN,  EAPC and  Enogex  have  caused  this
Agreement to be signed by their respective  officers  thereunto duly authorized,
all as of the date first above written.

                                         Southwestern Energy Pipeline Company


                                         By: /s/   DEBBIE J. BRANCH
                                            ------------------------------
                                         Name: Debbie J. Branch
                                         Title: Senior Vice President

                                         Southwestern Energy Company

                                         By:  /s/  STANLEY D. GREEN
                                            ------------------------------
                                         Name: Stanley D. Green
                                         Title: Executive Vice President - 
                                                Finance & Corporate Development


                                          Enogex Arkansas Pipeline Corporation



                                          By:   /s/  ROGER A FARRELL
                                             ------------------------------
                                          Name: Roger A. Farrell
                                          Title:   Vice President






                                       42





                                          Enogex Inc.



                                          By: /s/  ROGER A. FARRELL
                                             -----------------------------
                                          Name: Roger A. Farrell
                                          Title:   Executive Vice President

                                       43