TEJAS GAS CORP
8-K, 1997-09-26
NATURAL GAS TRANSMISSION
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                       SECURITIES AND EXCHANGE COMMISSION

                            Washington, D. C.  20549





                                    FORM 8-K

                                 CURRENT REPORT



                     Pursuant to Section 13 or 15(d) of the
                        Securities Exchange  Act of 1934



       Date of Report (Date of earliest event reported)September 23, 1997       

                              TEJAS GAS CORPORATION
             (Exact name of registrant as specified in its charter)



        DELAWARE                   0-17389                 76-0263364
  (State or other                  (Commission            (I.R.S. Employer
  jurisdiction                    File Number)         Identification Number)
   of incorporation)


               1301 MCKINNEY, SUITE 700
                    HOUSTON, TEXAS                              77010
       (Address of principal executive offices)              (Zip Code)


     Registrant's telephone number, including area code:     (713) 658-0509


                                                                                


ITEM 5.     OTHER EVENTS.


            On September 23, 1997, Tejas Gas Corporation (the "Company") and
            Shell Oil Company ("Shell") issued a press release announcing that
            they had entered into a merger agreement (the "Merger Agreement")
            for the merger of a special purpose subsidiary of Shell with and
            into the Company, which, subject to stockholder approval and other
            conditions, will result in the Company becoming a subsidiary of
            Shell. In the proposed merger, holders of the Company's common stock
            will receive $61.50 for each common share.  The foregoing summaries
            of the press release and the Merger Agreement are qualified by the
            copy of the press release attached hereto as Exhibit 99.1 and
            incorporated herein by reference and the copy of the Merger
            Agreement attached hereto as Exhibit 2.1 and incorporated herein by
            reference.  In connection with the Merger Agreement, the Company
            amended the Company's Rights Agreement.  A copy of such amendment is
            attached hereto as Exhibit 4.1 and incorporated herein by reference.
            
            ITEM 7.     FINANCIAL STATEMENTS AND EXHIBITS.


            (c)   Exhibits

                  2.1 - Merger Agreement dated as of September 23, 1997 among
                  Tejas Gas Corporation, Shell Oil Company, Trango Holdings
                  Corporation and Tango Acquisition Corporation.

                  4.1 - Amendment No. 1 to Rights Agreement dated as of
                  September 23, 1997, between Tejas Gas Corporation and Harris
                  Trust and Savings Bank.

                  99.1 - News Release dated as of September 23, 1997 issued by
                  Tejas Gas Corporation and Shell Oil Company.



                                   SIGNATURES


      Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.



                                    TEJAS GAS CORPORATION
                                          (Registrant)



Date: September 25, 1997                  By:  /s/ James W. Whalen              
                                          James W. Whalen
                                          Senior Executive Vice President and
                                            Chief Financial Officer






                                  EXHIBIT INDEX
                                  

Exhibit No.       Description

  2.1             Merger Agreement dated as of September 23, 1997 among
                  Tejas Gas Corporation, Shell Oil Company, Trango
                  Holdings Corporation and Tango Acquisition Corporation.

  4.1             Amendment No. 1 to Rights Agreement dated as of September 23,
                  1997, between Tejas Gas Corporation and Harris Trust and
                  Savings Bank.
  
  99.1            News Release dated September 23, 1997 issued by Tejas Gas
                  Corporation and Shell Oil Company.






          The Registrant hereby undertakes to furnish supplementally a copy of
     any omitted schedule to this Merger Agreement to the Commission upon
     request. 



                          MERGER AGREEMENT

                            dated as of

                         September 23, 1997

                               among

                       TEJAS GAS CORPORATION,

                         SHELL OIL COMPANY,

                   TRANGO HOLDINGS CORPORATION
                                 
                                and

                   TANGO ACQUISITION CORPORATION


                   TABLE OF CONTENTS
     
     
                                                   Page
     
     ARTICLE 1
     The Merger
     Section 1.01.  The Merger . . . . . . . . . . . .2
     Section 1.02.  Conversion of Shares . . . . . . .3
     Section 1.03.  Surrender and Payment. . . . . . .4
     Section 1.04.  Dissenting Shares. . . . . . . . .6
     Section 1.05.  Stock Options. . . . . . . . . . .6
     Section 1.06.  Redemption of the Company 
         5-1/4% Preferred.............................7
     Section 1.07.  Transfer Taxes, etc. . . . . . . .7
     Section 1.08.  Creation of Sierra Acquisition . .7
     Section 1.09.  Shell Guarantee. . . . . . . . . .7
     
     ARTICLE 2
     The Surviving Corporation
     Section 2.01.  Certificate of Incorporation . . .8
     Section 2.02.  By-laws. . . . . . . . . . . . . .8
     Section 2.03.  Directors and Officers . . . . . .8
     
     ARTICLE 3
     Warranties of the Company
     Section 3.01.  Corporate Existence and Power. . .9
     Section 3.02.  Corporate Authorization. . . . . .9
     Section 3.03.  Governmental Authorization . . . .9
     Section 3.04.  Non-Contravention. . . . . . . . 10
     Section 3.05.  Capitalization . . . . . . . . . 10
     Section 3.06.  Subsidiaries . . . . . . . . . . 11
     Section 3.07.  SEC Filings. . . . . . . . . . . 13
     Section 3.08.  Financial Statements . . . . . . 13
     Section 3.09.  Disclosure Documents . . . . . . 14
     Section 3.10.  Absence of Certain Changes . . . 14
     Section 3.11.  Litigation; Compliance . . . . . 16
     Section 3.12.  Taxes. . . . . . . . . . . . . . 17
     Section 3.13.  ERISA. . . . . . . . . . . . . . 19
     Section 3.14.  Permits. . . . . . . . . . . . . 22
     Section 3.15.  Required Stockholder Vote. . . . 23
     Section 3.16.  Finders' Fees. . . . . . . . . . 23
     Section 3.17.  Environmental Matters. . . . . . 23
     Section 3.18.  Restrictions on Business 
        Activities...................................23
     Section 3.19.  Title to Property. . . . . . . . 24
     Section 3.20.  Interested Party Transactions. . 24
     Section 3.21.  Insurance. . . . . . . . . . . . 24
     Section 3.22.  Opinion of Financial Advisor . . 25
     Section 3.23.  Intellectual Property. . . . . . 25
     Section 3.24.  Certain Obligations. . . . . . . 26
     Section 3.25.  Public Utility . . . . . . . . . 27
     Section 3.26.  Takeover Statutes. . . . . . . . 27
     Section 3.27.  Minute Books . . . . . . . . . . 27
     
     ARTICLE 4
     Warranties of Shell
     Section 4.01.  Corporate Existence and Power. . 28
     Section 4.02.  Corporate Authorization. . . . . 28
     Section 4.03.  Governmental Authorization . . . 28
     Section 4.04.  Non-Contravention. . . . . . . . 29
     Section 4.05.  Disclosure Documents . . . . . . 29
     Section 4.06.  Public Utility . . . . . . . . . 30
     Section 4.07.  Finders' Fees. . . . . . . . . . 30
     Section 4.08.  Litigation . . . . . . . . . . . 30
     Section 4.09.  Financing. . . . . . . . . . . . 30
     Section 4.10.  Ownership of Company Common 
        Shares.......................................30
     
     ARTICLE 5
     Covenants of the Company
     Section 5.01.  Affirmative Covenants of the 
        Company......................................31
     Section 5.02.  Negative Covenants of the 
        Company .....................................31
     Section 5.03.  No Solicitation. . . . . . . . . 35
     Section 5.04.  Settlement of Certain Claims . . 36
     Section 5.05.  Antitakeover Statutes. . . . . . 37
     
     ARTICLE 6
     Covenants of Each Party
     Section 6.01.  Reasonable Efforts . . . . . . . 37
     Section 6.02.  Pending and Upcoming FERC 
        Proceedings .................................38
     Section 6.03.  Public Announcements . . . . . . 39
     Section 6.04.  Notification of Certain Matters. 39
     Section 6.05.  Proxy Statement; Stockholder 
        Meeting .....................................39
     Section 6.06.  Access to Information; 
        Confidentiality .............................40
     Section 6.07.  Confidentiality Agreement. . . . 40
     Section 6.09.  Director and Officer Liability . 40
     Section 6.10.  Revised Schedules. . . . . . . . 41
     
     ARTICLE 7
     Conditions
     Section 7.01.  Conditions to the Obligations of
          Each Party.................................42
     Section 7.02.  Conditions to the Obligations of
          Shell, Sierra Acquisition, Holdings and
          MergerSub..............................    43
     Section 7.03.  Conditions to the Obligations
          of the Company.............................44
     
     ARTICLE 8
     Termination
     Section 8.01.  Termination. . . . . . . . . . . 45
     Section 8.02.  Effect of Termination. . . . . . 47
     Section 8.03.  Certain Fees . . . . . . . . . . 47
     
     ARTICLE 9
     Miscellaneous
     Section 9.01.  Notices. . . . . . . . . . . . . 48
     Section 9.02.  Amendments; No Waivers . . . . . 50
     Section 9.03.  Rules of Construction. . . . . . 50
     Section 9.04.  Successors and Assigns . . . . . 50
     Section 9.05.  Governing Law; etc . . . . . . . 50
     Section 9.06.  Counterparts; Effectiveness. . . 51
     Section 9.07.  Parties in Interest. . . . . . . 51
     Section 9.08.  Severability . . . . . . . . . . 52
     Section 9.09.  Entire Agreement . . . . . . . . 52
     Section 9.10.  Survival of Warranties . . . . . 52
     
                        EXHIBITS
     
     Exhibit A Amended Certificate of Incorporation of the Company
     Exhibit B Press Release
     
     
                       SCHEDULES
                            
     Schedule 3.04(b)(i)      Non-Contravention
     Schedule 3.05(a)         Capitalization
     Schedule 3.06(a)         Subsidiaries
     Schedule 3.06(b)         Subsidiaries
     Schedule 3.08            Financial Statements
     Schedule 3.10            Absence of Certain Changes
     Schedule 3.11(a)         Litigation; Compliance
     Schedule 3.11(b)         Litigation; Compliance
     Schedule 3.12(b)         Taxes
     Schedule 3.12(c)         Taxes
     Schedule 3.14(1)         Permits
     Schedule 3.14(2)         Permits
     Schedule 3.17            Environmental Matters
     Schedule 3.18            Restrictions on Business Activities
     Schedule 3.19            Title to Property
     Schedule 3.20            Interested Party Transactions
     Schedule 3.21            Insurance
     Schedule 3.23(b)         Intellectual Property
     Schedule 3.23(c)         Intellectual Property
     Schedule 3.24(a)(1)      Intellectual Property
     Schedule 3.24(a)(2)      Intellectual Property
     Schedule 3.24(b)         Intellectual Property
     Schedule 3.24(c)         Intellectual Property
     Schedule 4.04(b)(i)      Non-Contravention
     Schedule 4.08            Litigation
     Schedule 5.02            Negative Covenants of the Company
     Schedule 5.02(e)         Negative Covenants of the Company
     Schedule 5.02(f)         Negative Covenants of the Company
     
     
     
                    MERGER AGREEMENT
     MERGER AGREEMENT dated as of September 23, 1997 among TEJAS
     GAS CORPORATION, a Delaware corporation (the "COMPANY"), SHELL OIL
     COMPANY, a Delaware corporation ("SHELL"), TRANGO HOLDINGS
     CORPORATION, a Delaware corporation ("HOLDINGS"), and TANGO
     ACQUISITION CORPORATION, a Delaware corporation and a wholly owned
     subsidiary of Holdings ("MERGERSUB", and, together with Shell,
     Holdings and SIERRA ACQUISITION, an entity to be formed prior to
     the Effective Time ("SIERRA ACQUISITION"), the "SHELL GROUP"). 
     Capitalized terms used but not defined in this Agreement shall
     have the meanings assigned to them in Annex I.
     WHEREAS, by approval of their Boards of Directors, each of
     Shell, Holdings, MergerSub and the Company have determined to
     engage in the transactions contemplated hereby, pursuant to which,
     among other things, at the Effective Time, (i) MergerSub shall
     merge with and into the Company, and (ii) each share of Common
     Stock, par value $.25 per share, of the Company ("COMPANY COMMON
     SHARES") (except for Company Common Shares owned by the Company
     and Company Common Shares as to which appraisal rights have been
     perfected) shall be converted into the right to receive, in
     exchange for such Company Common Share, cash from Sierra
     Acquisition in an amount equal to $61.50, without interest (the
     "MERGER CONSIDERATION"), as set forth herein;
      WHEREAS, the Board of Directors of the Company (at a
     meeting duly called and held, and acting on the unanimous
     recommendation of a special committee of the Board of Directors of
     the Company comprised entirely of non-management independent
     directors (the "SPECIAL COMMITTEE")), has approved this Agreement
     and the Merger contemplated hereby and resolved to recommend,
     subject to its fiduciary duties, that stockholders of the Company
     approve and adopt this Agreement and the Merger;
     WHEREAS, the Boards of Directors of each of Shell, Holdings,
     and MergerSub have approved the transactions contemplated hereby;
     WHEREAS, Shell and the Company desire to make certain
     warranties, covenants and agreements in connection with the
     transactions contemplated hereby and also to prescribe certain
     conditions to the transactions contemplated hereby; and
     WHEREAS, as inducements to Shell, Holdings, and MergerSub
     entering into this Agreement and incurring the obligations set
     forth herein, and contemporaneously with the execution and
     delivery of this Agreement, Messrs. Charles C. Gates, Jay A.
     Precourt and Frederic C. Hamilton and certain of their respective
     Affiliates have entered into three separate Voting Agreements with
     Shell (the "VOTING AGREEMENTS") pursuant to which, among other
     things, each such stockholder has agreed to vote all of its
     Company Common Shares in favor of this Agreement and the Merger.
     NOW, THEREFORE, in consideration of the foregoing and the
     warranties, covenants and agreements contained herein, the parties
     hereto agree as follows:
                       
                       ARTICLE 1

     The Merger

     SECTION 1.01  The Merger.  (a) At the Effective Time,
     MergerSub shall be merged (the "MERGER") with and into the Company
     in accordance with the General Corporation Law of the State of
     Delaware (the "DELAWARE LAW"), whereupon the separate existence of
     MergerSub shall cease, and the Company shall be the surviving
     corporation (the "SURVIVING CORPORATION").
     
     (b) The Closing shall take place at the offices of Shell in
     Houston, Texas at 10:00 a.m. on December 31, 1997 or at such other
     place, time and date as the parties hereto may agree.  The date on
     which the Effective Time occurs is referred to herein as the
     "CLOSING DATE."
     
     (c)  At the Closing, upon fulfillment or waiver of the
     conditions precedent to the Merger set forth in Article 7, the
     parties shall cause a Certificate of Merger to be filed with the
     Secretary of State of the State of Delaware, in such form as
     required by, and duly executed in accordance with, the relevant
     provisions of the Delaware Law using the procedures permitted in
     Section 251 of the Delaware Law.  The Merger shall become
     effective at such time as the certificate of merger is duly filed
     with the Secretary of State of the State of Delaware or at such
     later time as the Company and Shell agree to specify in the
     certificate of merger (the "EFFECTIVE TIME").
     
     (d)  From and after the Effective Time, the Surviving
     Corporation shall possess all the rights, privileges, powers and
     franchises and be subject to all of the restrictions, disabilities
     and duties of the Company and MergerSub, all as provided under
     Delaware Law.
     
     (e)  The Surviving Corporation may, at any time after
     the Effective Time, take any action (including the execution and
     delivery of any document) in the name and on behalf of either of
     the Company and MergerSub in order to carry out and effectuate the
     transactions contemplated by this Agreement.
     
     (f)  The Company hereby represents that (x) the Special
     Committee has unanimously (i) determined that this Agreement and
     the Merger are fair to and in the best interests of the Company's
     stockholders, and (ii) recommended that this Agreement and the
     Merger be approved by the full Board of Directors and (y) its
     Board of Directors, at a meeting duly called and held, and acting
     on such unanimous recommendation of the Special Committee, has
     unanimously  determined that this Agreement and the Merger are
     fair to and in the best interests of the Company's stockholders, 
     approved this Agreement and the Merger (and for purposes of
     Section 203 of the Delaware Law, the Voting Agreements), which
     approval satisfies in full the requirements of the Delaware Law
     that the Agreement be approved by the Company's Board of Directors
     and  resolved to recommend approval and adoption of this Agreement
     and the Merger by its stockholders; provided, that such
     recommendation may be withdrawn, modified or amended to the extent
     the Board of Directors of the Company deems it necessary to do so
     in the exercise of its fiduciary obligations to the Company's
     stockholders based on the advice of counsel.  The Company further
     represents that Merrill Lynch, Pierce, Fenner & Smith Incorporated
     ("MERRILL LYNCH") has delivered to the Company's Board of
     Directors its written opinion that, as of the date of such
     opinion, the Merger Consideration to be paid in the Merger was
     fair to the holders of Company Common Shares from a financial
     point of view. The Company has been advised that all of its
     directors and executive officers who hold Company Common Shares
     intend to vote in favor of the Merger.

     SECTION 1.02  Conversion of SharesAt the Effective Time:
     
     (a) each Company Common Share held by the Company as
     treasury stock shall be canceled and no payment shall be made with
     respect thereto;
     
     (b) each Company Common Share outstanding immediately prior
     to the Effective Time shall (except as otherwise provided in
     Section 1.02(a) or as provided in Section 1.04 with respect to
     Company Common Shares as to which appraisal rights have been
     perfected) be converted into the right to receive in exchange for
     such Company Common Share cash from Sierra Acquisition in an
     amount equal to the Merger Consideration, without interest.  The
     Company Common Shares so converted and exchanged as provided in
     this paragraph shall remain outstanding and be held by Sierra
     Acquisition as common stock of the Surviving Corporation.  After
     the Effective Time, the Company Common Shares held by Sierra
     Acquisition shall constitute the only outstanding common stock of
     the Surviving Corporation.  If, subsequent to the date of this
     Agreement but prior to the Effective Time, the Company changes the
     number of Company Common Shares outstanding as a result of any
     stock split, stock dividend, recapitalization or similar
     transaction, the Merger Consideration obtainable upon conversion
     of a Company Common Share as provided in this Section 1.02(b) 
     shall be appropriately adjusted;
     
     (c) each share of common stock, par value $.01 per share, of
     MergerSub outstanding immediately prior to the Effective Time
     shall be canceled, and no payment shall be made with respect
     thereto; and
     
     (d) each share of the Company's 9.96% Cumulative Preferred
     Stock, par value $1.00 per share (the "COMPANY 9.96% PREFERRED"),
     shall remain outstanding as one share of 9.96% Preferred of the
     Surviving Corporation.

     SECTION 1.03.  Surrender and Payment.  (a) On and after the
     Effective Time, Sierra Acquisition will make available to the
     Exchange Agent, as needed to permit prompt payment of the Merger
     Consideration in accordance with this Agreement, the Merger
     Consideration to be exchanged for Company Common Shares in
     accordance with Section 1.02 (b).  Promptly after the Effective
     Time, Sierra Acquisition will send, or will cause the Exchange
     Agent to send, to each holder of Company Common Shares at the
     Effective Time a letter of transmittal for use in such exchange
     (which shall specify that the delivery shall be effected, and risk
     of loss shall pass, only upon proper delivery of the certificates
     representing Company Common Shares to the Exchange Agent).
     
     (b)  Each holder of Company Common Shares that have been
     converted into the right to receive in exchange for each Company
     Common Share the Merger Consideration, upon surrender to the
     Exchange Agent of a certificate or certificates representing such
     Company Common Shares, together with a properly completed letter
     of transmittal covering such Company Common Shares, will be
     entitled immediately upon such surrender to receive the Merger
     Consideration payable in respect of such Company Common Shares;
     provided that the Exchange Agent will withhold from payment all
     amounts required to be withheld by applicable law, including,
     without limitation, under the provisions of Code section 1445,
     unless the holder of Company Common Shares makes applicable
     affidavits or certifications reasonably satisfactory to the
     Exchange Agent (based on instructions from Sierra Acquisition)
     that the Merger Consideration is not subject to withholding. 
     Until so surrendered, each certificate representing Company Common
     Shares that have been converted into the right to receive in
     exchange for each Company Common Share the Merger Consideration
     shall, after the Effective Time, represent for all purposes, only
     the right to receive the Merger Consideration.
     
     (c) If any portion of the Merger Consideration is to be paid
     to a Person other than the registered holder of the Company Common
     Shares represented by the certificate or certificates surrendered
     in exchange therefor, it shall be a condition to such payment that
     the certificate or certificates so surrendered shall be properly
     endorsed or otherwise be in proper form for transfer and that the
     Person requesting such payment shall pay to the Exchange Agent any
     transfer or other taxes required as a result of such payment to a
     Person other than the registered holder of such Company Common
     Shares or establish to the satisfaction of the Exchange Agent
     (based on instructions from Sierra Acquisition) that such tax has
     been paid or is not payable.
     
     (d) After the Effective Time, there shall be no further
     registration of transfers of Company Common Shares other than any
     such registration into the names of Sierra Acquisition or
     Holdings, and other than registration of any subsequent transfers
     by Sierra Acquisition or Holdings.  If, after the Effective Time,
     certificates representing Company Common Shares are presented to
     the Surviving Corporation (by any Person other than by Sierra
     Acquisition or Holdings or any subsequent transferee from Sierra
     Acquisition or Holdings), they shall be exchanged for the
     consideration provided for, and in accordance with the procedures
     set forth, in this Article 1 and the relevant certificates
     formerly representing Company Common Shares shall be delivered to
     Sierra Acquisition as provided in Section1.02(b).
     
     (e) Any Merger Consideration made available to the Exchange
     Agent pursuant to Section 1.03(a) that remains unclaimed by the
     holders of Company Common Shares one year after the Effective Time
     shall be returned to Sierra Acquisition, upon demand, and any such
     holders who have not exchanged their Company Common Shares for the
     Merger Consideration in accordance with this Section prior to that
     time shall thereafter look only to Sierra Acquisition for payment
     of the Merger Consideration in respect of their Company Common
     Shares, subject to applicable abandoned property, escheat and
     other similar laws.  Notwithstanding the foregoing, Sierra
     Acquisition shall not be liable to any former holder of Company
     Common Shares for any amount paid to a public official pursuant to
     applicable abandoned property, escheat or other similar laws.  Any
     Merger Consideration remaining unclaimed by holders of Company
     Common Shares one day prior to such time as such amounts would
     otherwise escheat to or become property of any governmental entity
     shall, to the extent permitted by applicable law, become the
     property of Sierra Acquisition free and clear of any claims or
     interest of any Person previously entitled thereto.
     
     (f) Any Merger Consideration made available to the Exchange
     Agent pursuant to Section 1.03(a) to pay for Company Common Shares
     for which appraisal rights have been perfected shall be returned
     to Sierra Acquisition upon its demand.
     
     (g) Shell, Sierra Acquisition, Holdings, MergerSub and the
     Company, respectively, shall use all reasonable efforts to take
     all such action as may be necessary or appropriate in order to
     effectuate the Merger as promptly as possible, subject, in the
     case of the Company, to applicable fiduciary duties as provided in
     Section 5.03.  If, at any time after the Effective Time, any
     further action is necessary or desirable to carry out the purposes
     of this Agreement and to vest the Surviving Corporation with full
     right, title and possession to all assets, property, rights,
     privileges, immunities, powers and franchises of either of the
     Company or MergerSub, the officers and directors of the Surviving
     Corporation are fully authorized in the name of either of the
     Company or the MergerSub or otherwise to take, and shall take, all
     such action.
     
     SECTION 1.04.  Dissenting SharesNotwithstanding Section
     1.02, Company Common Shares outstanding immediately prior to the
     Effective Time and held by a holder who has not voted in favor of
     the Merger or consented thereto in writing and who has demanded
     appraisal for such Company Common Shares in accordance with
     Delaware Law ("DISSENTING SHARES") shall not be converted into a
     right to receive the Merger Consideration, unless such holder
     fails to perfect or withdraws or otherwise loses its right to
     appraisal or it is determined that such holder does not have
     appraisal rights in accordance with Delaware Law.  If after the
     Effective Time such holder fails to perfect or withdraws or loses
     its right to appraisal, or if it is determined that such holder
     does not have an appraisal right, such Company Common Shares shall
     be treated as if they had been converted as of the Effective Time
     into a right to receive in exchange for each Company Common Share
     the Merger Consideration.  The Company shall give Shell, Holdings
     and Sierra Acquisition prompt notice of any demands received by
     the Company for appraisal of Company Common Shares, and Shell,
     Holdings and Sierra Acquisition shall have the right to
     participate in all negotiations and proceedings with respect to
     such demands except as required by applicable law. The Company
     shall not, except with the prior written consent of Shell,
     Holdings and Sierra Acquisition, make any payment with respect to,
     or settle or offer to settle, any such demands.
     
     SECTION 1.05.  Stock Options.  Except as otherwise agreed in
     writing prior to the Effective Time between Holdings and the
     holder of any stock option, each stock option to purchase Company
     Common Shares outstanding at the Effective Time shall be canceled
     and each holder of any such option, whether or not then vested or
     exercisable, shall be paid by the Company promptly after the
     Effective Time for each such option an amount in cash determined
     by multiplying (i) the excess, if any, of the amount of the Merger
     Consideration over the applicable per share exercise price of such
     option by (ii) the number of Company Common Shares such holder
     could have purchased (assuming full vesting of all options) had
     such holder exercised such option in full immediately prior to the
     Effective Time.
     
     SECTION 1.06.  Redemption of the Company 5-1/4% Preferred.
     Prior to the Effective Time, the Company shall take all necessary
     steps to redeem all of its 5-1/4% Convertible Preferred Stock, par
     value $1.00 per share (the "COMPANY 5-1/4% PREFERRED"), in
     accordance with the Certificate of Designation for such Company 5-1/4%
     Preferred, so that such redemption shall be completed on or
     prior to the record date for the Company Stockholder Meeting.
     
     SECTION 1.07.  Transfer Taxes, etc.  Except as set forth in
     Section 1.03(c), (i) Holdings shall bear and be responsible for
     the payment of all transfer, stamp, documentary, sales, use,
     registration and other similar Taxes (but excluding any federal,
     state, or local taxes measured by the income of the Person
     responsible for paying such Taxes) (collectively, the "TRANSFER
     TAXES") incurred in connection with the exchange of Company Common
     Shares for the Merger Consideration up to the amount which would
     have been incurred had such shares been acquired by Holdings, and
     (ii) Sierra Acquisition shall bear and be responsible for the
     payment of any such Transfer Taxes in excess of the amount payable
     by Holdings.
     
     SECTION 1.08. Creation of Sierra Acquisition.  Shell will
     take all actions necessary to create Sierra Acquisition and to
     cause it to become a party to and be bound by this Agreement prior
     to the Effective Time.
     
     SECTION 1.09.  Shell Guarantee.  Shell hereby irrevocably
     guarantees and agrees that Sierra Acquisition will have sufficient
     funds to pay when due the aggregate Merger Consideration and will
     comply with its obligations in Section 1.03(a).  The liability of
     Shell under this Section shall be absolute and unconditional,
     shall be as principal and not as a surety, and shall be binding
     upon Shell and its successors and assigns without regard to the
     insolvency, bankruptcy or reorganization of Sierra Acquisition or
     otherwise.  Shell hereby waives promptness, diligence,
     presentment, demand, protest and notice of any kind as to such
     obligations and its guarantee thereof and acceptance of or
     reliance on its obligations contained in this Section or any other
     circumstance that would constitute an equitable or legal discharge
     of Sierra Acquisition's obligations under Section 1.03(a).
     

                       ARTICLE 2
     
     The Surviving Corporation
     
     SECTION 2.01.  Certificate of Incorporation.  At the
     Effective Time, the certificate of incorporation of the Company
     shall be amended to read in its entirety substantially in the form
     set forth in Exhibit A and as so amended shall be the certificate
     of incorporation of the Surviving Corporation until thereafter
     amended in accordance with applicable law.
     
     SECTION 2.02.  By-laws.  The by-laws of MergerSub in effect
     at the Effective Time shall be the bylaws of the Surviving
     Corporation until amended in accordance with applicable law.
     
     SECTION 2.03.  Directors and Officers. From and after the
     Effective Time, the directors and officers of the Company shall be
     the directors and officers of the Surviving Corporation.
                       
                       
                       ARTICLE 3

     Warranties of the Company

     Each member of the Shell Group acknowledges that it is an
     informed and sophisticated buyer, and has engaged expert advisors,
     experienced in the evaluation of transactions such as those
     contemplated by this Agreement.  Each member of the Shell Group
     acknowledges that it has undertaken (or will prior to the
     Effective Time undertake) such investigation and has been (or will
     be) provided with and has evaluated (or will evaluate) such
     documents and information as it deems necessary to enable it to
     make an informed and intelligent decision with respect to the
     execution, delivery and performance of this Agreement.  In
     particular, each member of the Shell Group acknowledges that it
     and its representatives have been afforded (or will prior to the
     Effective Time be afforded) the opportunity to inspect the assets
     of the Company and to examine the records of the Company and its
     Subsidiaries with respect to all information in possession of the
     Company and its Subsidiaries relating to the Company and its
     Subsidiaries that has been requested by any member of the Shell
     Group. EACH MEMBER OF THE SHELL GROUP FURTHER ACKNOWLEDGES THAT,
     EXCEPT AS EXPRESSLY PROVIDED IN THIS ARTICLE 3, THE COMPANY AND
     ITS SUBSIDIARIES AND THEIR OFFICERS, DIRECTORS, EMPLOYEES,
     REPRESENTATIVES AND AGENTS (IN THEIR CAPACITIES AS SUCH) HAVE MADE
     NO, AND THE COMPANY AND ITS SUBSIDIARIES HEREBY EXPRESSLY DISCLAIM
     ANY, REPRESENTATIONS OR WARRANTIES AS TO THE ACCURACY OR
     COMPLETENESS OF SUCH INFORMATION, AS TO THE TITLE OF THE COMPANY
     OR ANY OF ITS SUBSIDIARIES TO ANY ASSETS OF THE COMPANY AND ITS
     SUBSIDIARIES, OR AS TO ANY OTHER INFORMATION, DATA OR OTHER
     MATERIALS (WRITTEN OR ORAL) FURNISHED TO THE SHELL GROUP OR ITS
     REPRESENTATIVES BY OR ON BEHALF OF THE COMPANY OR ANY OF ITS
     SUBSIDIARIES.  THE COMPANY AND ITS SUBSIDIARIES EXPRESSLY DISCLAIM
     ANY WARRANTY OF MERCHANTABILITY OF ANY OF THE ASSETS OF THE
     COMPANY OR OF THE FITNESS OF ANY OF THE ASSETS OF THE COMPANY AND
     ITS SUBSIDIARIES FOR ANY PURPOSE.  IT IS EXPRESSLY UNDERSTOOD AND
     AGREED THAT NONE OF THE WARRANTIES IN THIS AGREEMENT BY THE
     COMPANY SHALL BE DEEMED TO COVER CORAL.  Subject to the foregoing,
     the Company hereby warrants to Shell as follows:
     
     SECTION 3.01. Corporate Existence and Power.  The Company is
     a corporation duly incorporated, validly existing and in good
     standing under the laws of the State of Delaware, and has all
     corporate powers and all material governmental licenses,
     authorizations, consents and approvals required to carry on its
     business as now conducted. The Company is duly qualified to do
     business as a foreign corporation and is in good standing in each
     jurisdiction where the character of the property owned or leased
     by it or the nature of its activities makes such qualification
     necessary, except for those jurisdictions where the failure to be
     so qualified would not, individually or in the aggregate, have a
     Company Material Adverse Effect. The Company has heretofore
     delivered to Shell true and complete copies of the Company's
     certificate of incorporation and bylaws as currently in effect.
     
     SECTION 3.02. Corporate Authorization. The execution,
     delivery and performance by the Company of this Agreement and the
     consummation by the Company of the transactions contemplated
     hereby are within the Company's corporate powers and, except for
     any required approval by the Company's stockholders in connection
     with the consummation of the Merger, have been duly authorized by
     all necessary corporate action. This Agreement constitutes a valid
     and binding agreement of the Company, enforceable against the
     Company in accordance with its terms, subject to applicable
     bankruptcy, insolvency or other similar laws relating to or
     affecting the enforcement of creditors' rights generally and to
     legal principles of general applicability governing the
     application and availability of equitable remedies. 
     
     SECTION 3.03.  Governmental Authorization. The execution,
     delivery and performance by the Company of this Agreement and the
     consummation of the transactions contemplated by this Agreement by
     the Company require no action or waiting period by or in respect
     of, or filing with, any governmental body, agency, official or
     authority other than (a) the filing of a certificate of merger in
     accordance with Delaware Law; (b) compliance with any applicable
     requirements of the HSR Act; (c) compliance with any applicable
     requirements of the Securities Act, the Exchange Act or any Blue
     Sky Laws; (d) compliance with the rules and regulations of the
     FERC, of the Minerals Management Service of the Department of the
     Interior and of any other Governmental Authority in Texas,
     Louisiana and Oklahoma having jurisdiction, which rules and
     regulations apply generally to natural gas and natural gas liquids
     pipelines and plants; (e) compliance with Environmental Laws; and
     (f) compliance with those Laws, Regulations and Orders
     noncompliance with which would not reasonably be expected to have
     a Company Material Adverse Effect or to prevent, impair or result
     in significant delay of the consummation of the Merger.
     
     SECTION 3.04. Non-Contravention. The execution, delivery and
     performance by the Company of this Agreement and the consummation
     by the Company of the transactions contemplated hereby do not and
     will not (a)contravene or conflict with the certificate of
     incorporation or bylaws of the Company or (b) assuming
     effectuation of all filings and registrations with, the
     termination or expiration of any applicable waiting periods
     imposed by, and receipt of all Permits and Orders of, Governmental
     Authorities indicated as required in Section 3.03. (i) except as
     set forth in Schedule3.04(b)(i), constitute a default under or
     give rise to  a right of termination, cancellation, acceleration,
     amendment or modification with respect to the Company or any of
     its Subsidiaries,  a loss of any benefit to which the Company or
     any of its Subsidiaries is entitled or  an increase in the
     obligations of the Company or any of its Subsidiaries, in each
     case, under any provision of any Material Contract of the Company
     or any of its Subsidiaries which, in any such case, individually
     or in the aggregate, would have a Company Material Adverse Effect,
     (ii) except as set forth in Schedule 3.04(b)(ii), result in the
     creation or imposition of any material Lien (other than any
     Permitted Encumbrances) on any material asset of the Company or
     any of its Subsidiaries or (iii) except as set forth in Schedule
     3.04(b)(iii), violate or cause a breach under any Law, Regulation,
     Order or Permit applicable to the Company, its Subsidiaries and
     their respective assets except for any such matters that would not
     reasonably be expected, individually or in the aggregate, to have
     a Company Material Adverse Effect.
     
     SECTION 3.05. Capitalization. (a) The authorized capital
     stock of the Company consists of (x) 30,000,000 authorized Company
     Common Shares, and (y) 6,000,000 authorized preferred shares, par
     value $1.00 per share, of which 260,000 shares have been
     designated as the Company 5-1/4% Preferred, 200,000 shares have
     been designated as the Company 9.96% Preferred, and 300,000 shares
     have been designated as the Company's Series C Junior
     Participating Preferred Stock, par value $1.00 per share, and have
     been reserved for issuance pursuant to the Rights Plan.  As of the
     date of this Agreement, there were issued and outstanding
     20,578,467 Company Common Shares, 260,000 shares of Company 5-1/4%
     Preferred (convertible into an aggregate of 1,532,180 Company
     Common Shares), 200,000 shares of Company 9.96% Preferred and
     options to purchase an aggregate of 1,453,385 Company Common
     Shares.  All outstanding shares of capital stock of the Company
     have been duly authorized and validly issued and are fully paid
     and nonassessable. Except as set forth in this Section, changes
     since the date of this Agreement resulting from the exercise of
     employee stock options outstanding on such date, the redemption of
     the 5-1/4% Preferred as contemplated by this Agreement, the award
     of up to $10,000 of Company Common Shares issued in accordance
     with the Director Stock Award Plan to directors electing to
     receive stock in lieu of quarterly fees after the date of this
     Agreement, and the issuance by the Company of Company Common
     Shares upon conversion of the Company 5-1/4% Preferred, there are
     outstanding (i) no shares of capital stock or other voting
     securities of the Company,  (ii) no securities of the Company
     convertible into or exchangeable for shares of capital stock or
     voting securities of the Company, and (iii) no options or other
     rights to acquire from the Company, and no obligation of the
     Company to issue, any capital stock, voting securities or
     securities convertible into or exchangeable for capital stock or
     voting securities of the Company (the items in clauses 3.05(a)(i),
     3.05(a)(ii) and 3.05(a)(iii) being referred to collectively as the
     "COMPANY SECURITIES").   Except as set forth in this Agreement or
     on Schedule 3.05(a), there are no outstanding obligations of the
     Company or any of its Subsidiaries to repurchase, redeem or
     otherwise acquire any Company Securities.
     
     (b) The Company has adopted an amendment to the Rights Plan,
     a true and correct copy of which has been delivered to Shell,
     pursuant to which Shell, Sierra Acquisition and Holdings will not
     be deemed to be Acquiring Persons (as defined in the Rights Plan)
     as a result of the execution or consummation of the transactions
     provided for by this Agreement and the Voting Agreements (in the
     manner provided for therein), including without limitation, the
     consummation of the Merger.
     
     SECTION 3.06. Subsidiaries.  (a) Each of the Company's
     Subsidiaries is a corporation or other legal entity duly
     incorporated or organized, validly existing and in good standing
     under the laws of its jurisdiction of incorporation or
     organization, has all corporate or entity powers and all
     governmental licenses, authorizations, consents and approvals
     required to carry on its business as now conducted, except to the
     extent the failure to have such licenses, authorizations, consents
     and approvals would not, individually or in the aggregate, have a
     Company Material Adverse Effect, and is duly qualified to do
     business as a foreign corporation or entity and is in good
     standing in each jurisdiction where the character of the property
     owned or leased by it or the nature of its activities makes such
     qualification necessary, except for those jurisdictions where
     failure to be so qualified would not, individually or in the
     aggregate, have a Company Material Adverse Effect.  All of the
     Company's Subsidiaries and their respective jurisdictions of
     incorporation or organization are identified on Schedule 3.06(a). 
     Complete copies of the certificate of incorporation and bylaws or
     other organizational documents of each Subsidiary of the Company,
     as amended to the date hereof, have been made available to Shell.
     
     (b) The authorized, issued and outstanding capital stock of,
     or other equity interests in, each of the Company's Subsidiaries
     and the names and addresses of the holders of record of the
     capital stock or other equity interests of each such Subsidiary
     are set forth in Schedule 3.06(b).  The issued and outstanding
     shares of capital stock of, or other equity interests in, each of
     the Subsidiaries of the Company that are owned by the Company or
     any of its Subsidiaries have been duly authorized and are validly
     issued, and, with respect to capital stock, are fully paid and
     nonassessable, and were not issued in violation of any preemptive
     or similar rights of any past or present equity holder of such
     Subsidiary.  All such issued and outstanding shares, or other
     equity interests, that are indicated as owned by the Company or
     one of its Subsidiaries in Schedule 3.06(b) are owned (i)
     beneficially as set forth therein and (ii) free and clear of all
     Liens other than Liens in favor of the Company's and its
     Subsidiaries' lenders pursuant to credit facilities attached as
     exhibits to the Company 10-K.  Except as set forth in Schedule
     3.06(b) and except as set forth in the agreements or
     organizational documents listed on Schedule 3.06(b), no shares of
     capital stock of, or other equity interests in, any Subsidiary of
     the Company are reserved for issuance, and there are no contracts,
     agreements, commitments or arrangements obligating the Company or
     any of its Subsidiaries (i) to offer, sell, issue, grant, pledge,
     dispose of or encumber any shares of capital stock of, or other
     equity interests in, or any options, warrants or rights of any
     kind to acquire any shares of capital stock of, or other equity
     interests in, or any securities that are convertible into or
     exchangeable for any shares of capital stock of, or other equity
     interests in, any of the Subsidiaries of the Company or (ii) to
     redeem, purchase or acquire, or offer to purchase or acquire, any
     outstanding shares of capital stock of, or other equity interests
     in, or any outstanding options, warrants or rights of any kind to
     acquire any shares of capital stock of or other equity interest
     in, or any outstanding securities that are convertible into or
     exchangeable for, any shares of capital stock of, or other equity
     interests in, any of the Subsidiaries of the Company or (iii) to
     grant any Lien on any outstanding shares of capital stock of, or
     other equity interest in, any of the Subsidiaries of the Company;
     provided, however, that certain terms and provisions of, and 
     applicable law relating to, the partnership or joint venture
     agreements or arrangements listed in Schedule 3.06(b) may require
     the partnerships or joint ventures to which such agreements or
     arrangements relate or the partners or venturers therein to take
     certain actions not material to the Company with respect to the
     equity interests in such partnerships and joint ventures contrary
     to clauses (i), (ii) or (iii) above; and provided further, that
     the warranties set forth in this Section are subject to such other
     matters as would not result in a Company Material Adverse Effect.
     
     SECTION 3.07.  SEC Filings.  (a) The Company has delivered
     to Shell (i) its annual reports on Form 10-K for its fiscal years
     ended December 31, 1994, 1995 and 1996, (ii) its quarterly reports
     on Form 10-Q for its fiscal quarters ended March 31, 1997 and June
     30, 1997 ("COMPANY 10-Q"), (iii) its proxy or information
     statements relating to meetings of, or actions taken without a
     meeting by, the stockholders of the Company held since January 1,
     1996, and (iv) all of its other reports, statements, schedules and
     registration statements filed with the Securities and Exchange
     Commission (the "SEC") since January 1, 1996 ("COMPANY SEC
     REPORTS").
     
     (b) As of its filing date, each such report or statement
     filed pursuant to the Exchange Act did not contain any untrue
     statement of a material fact or omit to state any material fact
     necessary in order to make the statements made therein, in the
     light of the circumstances under which they were made, not
     misleading.
     
     (c) Each such registration statement, as amended or
     supplemented, if applicable, filed pursuant to the Securities Act
     as of the date such statement or amendment became effective did
     not contain any untrue statement of a material fact or omit to
     state any material fact required to be stated therein or necessary
     to make the statements therein, in the light of the circumstances
     under which they were made, not misleading.
     
     SECTION 3.08. Financial Statements. The audited consolidated
     financial statements and unaudited consolidated interim financial
     statements of the Company included in its annual reports on Form
     10-K and the quarterly reports on Form 10-Q referred to in Section
     3.07 fairly present, in conformity with generally accepted
     accounting principles applied on a consistent basis (except as may
     be indicated in the notes thereto), the consolidated financial
     position of the Company and its consolidated subsidiaries as of
     the dates thereof and their consolidated results of operations and
     changes in financial position for the periods then ended (subject
     to normal year-end adjustments in the case of any unaudited
     interim financial statements). For purposes of this Agreement,
     "COMPANY BALANCE SHEET" means the consolidated balance sheet of
     the Company as of June 30, 1997 set forth in the Company 10-Q and
     "COMPANY BALANCE SHEET DATE" means June 30, 1997.  Except as set
     forth in Schedule 3.08, as of the date of this Agreement, there
     exist no liabilities or obligations of the Company and its
     Subsidiaries, whether accrued, absolute, contingent or threatened,
     which would be required to be reflected, reserved for or disclosed
     under generally accepted accounting principles in the financial
     statements of the Company as of and for the period ended June 30,
     1997, other than (i) liabilities or obligations which are
     adequately reflected, reserved for or disclosed in the June 30,
     1997 financial statements of the Company, (ii) liabilities
     incurred in the ordinary course of business since June 30, 1997
     and (iii) such as would not have a Company Material Adverse
     Effect.
     
     SECTION 3.09.  Disclosure Documents.  (a) Each document
     required to be filed by the Company with the SEC in connection
     with the transactions contemplated by this Agreement (the "COMPANY
     DISCLOSURE DOCUMENTS"), including, without limitation, the proxy
     statement (the "PROXY STATEMENT") to be filed with the SEC in
     connection with the Merger and any amendments or supplements
     thereto will, when filed, comply as to form in all material
     respects with the applicable requirements of the Exchange Act and
     the Securities Act, except that no warranty is made hereby with
     respect to any information supplied by the Shell Group expressly
     for inclusion in the Company Disclosure Documents.
     
     (b) At the time the Proxy Statement or any amendment or
     supplement thereto is first mailed to stockholders of the Company,
     and at the time such stockholders vote on adoption of this
     Agreement, the Proxy Statement, as supplemented or amended, if
     applicable, will not contain any untrue statement of a material
     fact or omit to state any material fact necessary in order to make
     the statements made therein, in the light of the circumstances
     under which they were made, not misleading, except that no
     warranty is made hereby with respect to any information supplied
     by the Shell Group for inclusion in the Proxy Statement.
     SECTION 3.10.  Absence of Certain Changes.  Except for this
     Agreement and except as set forth in Schedule 3.10 or in the
     Company SEC Reports, from the Company Balance Sheet Date through
     the date of this Agreement, the Company and its Subsidiaries have
     conducted their business in all material respects in the ordinary
     course consistent with past practice and there has not been:
     
     (a) any event, occurrence or development (including the
     commencement of any action, suit or proceedings or, to the
     Knowledge of the Company, any investigation) of a state of
     circumstances or facts which, individually or together with other
     similar events, has had or reasonably would be expected to have a
     Company Material Adverse Effect;
     
     (b) any declaration, setting aside or payment of any
     dividend or other distribution with respect to any shares of
     capital stock of the Company (other than the regular quarterly
     cash dividends on the Company 5-1/4% Preferred and the Company
     9.96% Preferred, each having customary record and payment dates),
     or any repurchase, redemption (other than (i) the redemption of
     the Company 5-1/4% Preferred as contemplated by this Agreement,
     (ii) the receipt of Company Common Shares in payment of the
     exercise price of employee or director stock options and Taxes in
     respect of such exercise, and (iii) repurchases to fulfill the
     Company's matching contribution under its 401(k) plan) or other
     acquisition by the Company or any of its Subsidiaries of any
     outstanding shares of capital stock or other securities of, or
     other ownership interests in, the Company or any of its
     Subsidiaries;
     
     (c) any amendment of any material term of any outstanding
     security of the Company or any of its Subsidiaries other than
     amendments to the terms of the existing credit facilities of the
     Company or its Subsidiaries or borrowings under such facilities;
     
     (d) any incurrence, assumption or guarantee by the Company
     or any of its Subsidiaries of any indebtedness for borrowed money
     other than in the ordinary course of business and in amounts and
     on terms consistent with past practices and other than
     indebtedness to provide funds for the redemption of the Company 5-1/4%
     Preferred;
     
     (e) any creation or assumption by the Company or any of its
     Subsidiaries of any Lien (other than Permitted Encumbrances) on
     any material asset of the Company or any of its Subsidiaries other
     than in the ordinary course of business consistent with past
     practices;
     
     (f) any making of any loan, advance or capital contribution
     to or investment in any Person other than loans, advances or
     capital contributions to or investments in wholly-owned
     Subsidiaries made in the ordinary course of business consistent
     with past practices;
     
     (g) any damage, destruction or other casualty loss (whether
     or not covered by insurance) affecting the business or assets of
     the Company or any of its Subsidiaries which, individually or in
     the aggregate, has had or would reasonably be expected to have a
     Company Material Adverse Effect;
     
     (h) any transaction or commitment made, or any contract or
     agreement entered into, by the Company or any of its Subsidiaries
     relating to its assets or business (including the acquisition or
     disposition of any assets) or any relinquishment by the Company or
     any of its Subsidiaries of any contract or other right, in either
     case, material to the Company and its Subsidiaries taken as a
     whole, other than transactions and commitments in the ordinary
     course of business consistent with past practice and those
     contemplated by this Agreement;
     
     (i)any change in any method of accounting or accounting
     practice by the Company or any of its Subsidiaries, whether or not
     any such change is required by reason of a concurrent change in
     generally accepted accounting principles;
     
     (j) any (i) grant of any severance or termination pay to any
     director, officer or employee of the Company or any of its
     Subsidiaries, (ii) entering into of any employment, deferred
     compensation or other similar agreement (or any amendment to any
     such existing agreement) with any director, officer or employee of
     the Company or any of its Subsidiaries, (iii) increase in benefits
     payable under any existing severance or termination pay policies
     or employment agreements or (iv) increase in compensation, bonus
     or other benefits payable to directors, officers or employees of
     the Company or any of its Subsidiaries except for such grants,
     payments, increases or changes in the ordinary course of business
     consistent with past practice; or
     
     (k) any labor dispute, other than routine individual
     grievances, or any activity or proceeding by a labor union or
     representative thereof to organize any employees of the Company or
     any of its Subsidiaries, which employees were not subject to a
     collective bargaining agreement at the Company Balance Sheet Date,
     or any lockouts, strikes, slowdowns, work stoppages or threats
     thereof by or with respect to such employees, which in any such
     case would reasonably be expected to have a Company Material
     Adverse Effect.

     Except as disclosed in Schedule 3.10 or in the Company SEC
     Reports, during the period from June 30, 1997 to the date of this
     Agreement, neither the Company nor any of its Subsidiaries has
     engaged in any conduct that is proscribed during the period from
     the date of this Agreement to the Effective Time by Section  5.02 
     or agreed in writing during such period prior to the date of this
     Agreement to engage in any such conduct.
     
     SECTION 3.11. Litigation; Compliance. (a) Except as set
     forth in the Company SEC Reports or Schedule 3.11(a), as of the
     latest date through which the Company has supplemented its
     Schedules pursuant to Section 6.10, there is no action, suit or
     proceeding pending against, or (to the Knowledge of the Company)
     threatened against or affecting, or (to the Knowledge of the
     Company) any pending investigation against, the Company or any of
     its Subsidiaries or any of their respective properties before any
     court or arbitrator or any governmental body, agency or official
     which would reasonably be expected, individually or in the
     aggregate, to have a Company Material Adverse Effect or which in
     any manner challenges or seeks to prevent, enjoin, alter or
     materially delay the Merger or any of the other transactions
     contemplated hereby.
     
     (b) Except as set forth in Schedule 3.11(b), the Company and
     its Subsidiaries are in substantial compliance with all applicable
     Laws and Regulations and are not in default with respect to any
     Order applicable to the Company or any of its Subsidiaries, except
     such events of noncompliance or defaults that, individually or in
     the aggregate, would not reasonably be expected to have a Company
     Material Adverse Effect.
     
     SECTION 3.12. Taxes. (a) For purposes of this Agreement,
     "TAX" or "TAXES" shall mean taxes, fees, levies, duties, tariffs,
     imposts, and governmental impositions or charges of any kind in
     the nature of (or similar to) taxes, payable to any federal,
     state, local or foreign taxing authority, including (without
     limitation) (i) income, franchise, profits, gross receipts, ad
     valorem, net worth, value added, sales, use, service, real or
     personal property, special assessments, capital stock, license,
     payroll, withholding, employment, social security, workers'
     compensation, utility, severance, production, excise, stamp,
     occupation, premiums, windfall profits, alternative or add-on
     minimum, estimated, environmental (including taxes under Code
     section 59A), unemployment, transfer and gains taxes, and (ii)
     interest, penalties, additional taxes, fines and other additions
     to tax imposed with respect thereto and any interest in respect of
     such penalties, additional taxes, fines and other additional
     amounts; and "TAX RETURNS" shall mean returns, reports, and
     information statements with respect to Taxes required to be filed
     with the IRS or any other taxing authority, domestic or foreign,
     including, without limitation, consolidated, combined and unitary
     tax returns (including returns required in connection with any
     Employee Plan).
     
     (b) Other than as disclosed in Schedule 3.12 (b) or the
     Company SEC Reports, the Company and its Subsidiaries have timely
     filed all required United States federal, state, local and foreign
     and other Tax Returns and such Tax Returns are true, complete and
     correct, and the Company and its Subsidiaries have timely paid and
     discharged all Taxes due in connection with or with respect to the
     periods or transactions covered by such Tax Returns and have paid
     all other Taxes as are due, except such as are being contested in
     good faith by appropriate proceedings (to the extent that any such
     proceedings are required) and there are no other Taxes that would
     be due if asserted by a taxing authority, except Taxes with
     respect to which the Company is maintaining reserves to the extent
     required by generally accepted accounting principles, except where
     the failure of any of the foregoing to be true would not,
     individually or in the aggregate, reasonably be expected to have a
     Company Material Adverse Effect.  Except as disclosed in Schedule
     3.12(b) or as does not involve or would not result in liability to
     the Company or any of its Subsidiaries that would reasonably be
     expected to have a Company Material Adverse Effect, (i) there are
     no Tax Liens on any assets of the Company or any of its
     Subsidiaries (other than Permitted Encumbrances); (ii) neither the
     Company nor any of its Subsidiaries has granted any waiver of any
     statute of limitations with respect to, or any extension of a
     period for the assessment or payment of, any Tax; (iii) there is
     no written claim against the Company or any of its Subsidiaries
     for any Taxes, and no assessment, deficiency or adjustment has
     been asserted or proposed with respect to any Tax Return; (iv) all
     Tax Returns filed by the Company and its Subsidiaries have been
     audited by the applicable Governmental Authority or the applicable
     statute of limitations has expired for the period covered by such
     Tax Returns; (v) none of the Company and its Subsidiaries, during
     the last ten years, has been a member of an affiliated group
     filing a consolidated federal income Tax Return (other than
     Company's Tax Group); (vi) neither the Company nor any of its
     Subsidiaries has any liability for the Taxes of any Person (other
     than any of the Company and its Subsidiaries) under Treasury
     Regulation section 1.1502-6 (or any similar provision of state,
     local or foreign law), as a transferee or successor, by contract
     or otherwise; (vii)neither the Company nor any of its Subsidiaries
     has filed a consent under Code section 341(f) concerning
     collapsible corporations; (viii) neither the Company nor any of
     its Subsidiaries has any deferred intercompany gains or losses
     from any "deferred intercompany transactions"  (as defined in
     Treasury Regulation section 1.1502-13); (ix) neither the Company
     nor any of its Subsidiaries has any Tax attribute carry forwards
     (including, but not limited to, any net operating loss carry
     forward, net capital loss carry forward, credit carry forward or
     carry forward of any other Tax attribute); (x) none of the Company
     or Subsidiary Tax attribute carry forwards are limited by
     applicable law, such as the provisions of Code sections 382, 383
     and 384 and of Treasury Regulations promulgated under Code section
     1502; (xi) neither the Company nor its Subsidiaries has agreed to
     any adjustments under Code section 481; and (xii) neither the
     Company nor any of its Subsidiaries has an excess loss account
     under Treasury Regulation section 1.1502.  The accruals and
     reserves (including deferred taxes) reflected in the Company
     Balance Sheet are in all material respects adequate to cover all
     Taxes accruable through the date thereof (including interest and
     penalties, if any, thereon and Taxes being contested) in
     accordance with generally accepted accounting principles.
     
     (c) Other than as disclosed on Schedule 3.12(c) or in the
     Company SEC Reports, and other than with respect to items the
     inaccuracy of which would not reasonably be expected to have a
     Company Material Adverse Effect, neither the Company nor any of
     its Subsidiaries is obligated under any agreement with respect to
     industrial development bonds or other obligations with respect to
     which the excludability from gross income of the holder for
     federal or state income tax purposes could be affected by the
     transactions contemplated hereunder, and to the Knowledge of the
     Company, neither the Company nor any of its Subsidiaries owns any
     property of a character, the indirect transfer of which, as a
     consequence of the Merger, would give rise to any material
     documentary, stamp or other transfer tax.
     
     (d) The Company is a United States real property holding
     corporation (as defined in Section 897(c)(2) of the Code). 
     
     SECTION 3.13. ERISA.  (a) The Company has provided Shell
     with a list identifying each Company Employee Plan.  True and
     complete copies of such plans (and, if applicable, related trust
     agreements) and all amendments thereto and written interpretations
     thereof have been made available for review to Shell together with 
     (A) the most recent annual report (Form 5500 including, if
     applicable, Schedule B thereto) required to be prepared in
     connection with any such plan, (B) the most recent actuarial
     valuation report prepared in connection with any such plan, (C)
     summary descriptions of any amendments not included in the most
     recent restated plan instrument, which amendments have been
     approved by the person in the Company having the final authority
     to adopt plan amendments, whether or not such amendments have been
     previously reduced to writing, and (D) the dollar amount of
     unfunded liabilities resulting from any benefit increases that
     have been adopted in an amendment but are not yet reflected in the
     latest actuarial report.   The only Company Employee Plans which
     individually or collectively would constitute an "employee pension
     benefit plan" as defined in Section 3(2) of ERISA (the "COMPANY
     PENSION PLANS") have been identified as such in the information
     provided to Shell by the Company.
     
     (b) No Company Employee Plan constitutes a Company
     Multiemployer Plan.  Except as otherwise identified in the list
     referred to in Section 3.13(a), no Company Employee Plan is
     maintained in connection with any trust described in Section
     501(c)(9) of the Code. The only Company Pension Plans that are
     subject to Title IV of ERISA (the "COMPANY RETIREMENT PLANS") have
     been identified as such in information provided to Shell by the
     Company. The funding status of each Company Retirement Plan is
     disclosed in the Company's annual report in the Company 10-K; no
     Company Retirement Plan is omitted from such discussion.  With
     respect to each Company Retirement Plan, as of the date of the
     latest actuarial valuation report for such Company Retirement
     Plan, the fair market value of all of the assets of such Company
     Retirement Plan (excluding for these purposes any accrued but
     unpaid contributions) exceeded the accrued benefits under such
     Company Retirement Plan, calculated on an accumulated benefit
     obligation basis and based upon the actuarial assumptions used for
     accounting purposes (i.e., those determined in accordance with
     FASB statement no. 87 and used in preparing such Company
     Retirement Plan's financial statements).  With respect to each
     Company Retirement Plan, as of the date of this Agreement, such
     fair market value of assets exceeded said accrued benefits, taking
     into account: (i) any shortfall between the actual return on
     assets and the expected return on assets; (ii) any change in
     funding assumptions; (iii) any change in participant demographics;
     and (iv) benefit increases that have been adopted in an amendment
     but are not yet reflected in the latest actuarial report.  No
     "ACCUMULATED FUNDING DEFICIENCY", as defined in Section 412 of the
     Code, has been incurred with respect to any Company Pension Plan,
     whether or not waived. The Company knows of no "REPORTABLE EVENT",
     within the meaning of Section 4043 of ERISA, and no event
     described in Section 4041, 4042, 4062 or 4063 of ERISA has
     occurred in connection with any Company Employee Plan, other than
     a "REPORTABLE EVENT" or  other such event that will not have a
     Company Material Adverse Effect.  No condition exists and no event
     has occurred that would be expected to constitute grounds for
     termination of any Company Retirement Plan and neither the Company
     nor any of its affiliates has incurred any liability which would
     have a Company Material Adverse Effect under Title IV of ERISA
     arising in connection with the termination of, or complete or
     partial withdrawal from, any plan covered or previously covered by
     Title IV of ERISA. To the Knowledge of the Company, nothing done
     or omitted to be done and no transaction or holding of any asset
     under or in connection with any Company Employee Plan has or will
     make the Company or any of its Subsidiaries, any officer or
     director of the Company or any of its Subsidiaries subject to any
     liability under Title I of ERISA or liable for any tax pursuant to
     Section 4975 of the Code that could directly or indirectly have a
     Company Material Adverse Effect.  For purpose of this Section,
     "AFFILIATE" of any Person means any other Person which, together
     with such Person, would be treated as a single employer under
     Section 414 of the Code.
     
     (c) Each Company Employee Plan which is intended to be
     qualified under Section 401(a) of the Code has received from the
     Internal Revenue Service favorable determination letters with
     respect to each such Plan.  The Company has made available to
     Shell true and complete copies of such determination letters.  No
     event has occurred, and no condition exists, which could
     reasonably be expected to result in the revocation of such
     determination.  Any terms and conditions of the determination
     letter have been complied with.  Each Company Employee Plan has
     been maintained in compliance with its terms and with the
     requirements prescribed by any and all statutes, orders, rules and
     regulations, including but not limited to ERISA and the Code,
     which are applicable to such Company Employee Plan except for
     failures to comply which, singly or in the aggregate, would not
     have a Company Material Adverse Effect.
     
     (d) The Company has provided Shell with a list of each
     enforceable employment, severance or other similar contract,
     arrangement or policy and each plan or arrangement providing for
     insurance coverage (including any self-insured arrangements),
     workers' compensation, disability benefits, supplemental
     unemployment benefits, vacation benefits, retirement benefits or
     for deferred compensation, profit-sharing, bonuses, stock options,
     stock appreciation or other forms of incentive compensation or
     post-retirement insurance, compensation or benefits which (i) is
     not a Company Employee Plan, (ii) is entered into, maintained or
     contributed to, as the case may be, by the Company or any of its
     affiliates and (iii) covers any employee or former employee of the
     Company or any of its affiliates and will become an obligation of
     the Company after the Effective Time.  Such contracts, plans and
     arrangements as are described above, copies or descriptions of all
     of which have been made available for review previously to Shell
     are referred to collectively herein as the "COMPANY BENEFIT
     ARRANGEMENTS".  Each Company Benefit Arrangement has been
     maintained in substantial compliance with its terms and with the
     requirements prescribed by any and all statutes, orders, rules and
     regulations that are applicable to such Company Benefit
     Arrangement except for failures to comply which, singly or in the
     aggregate, would not have a Company Material Adverse Effect.
     
     (e) Except as disclosed on Schedule 3.13(e), the Company has
     not established, and does not maintain, any post-retirement
     benefits for its employees, including but not limited to post-retirement
     life insurance or post-retirement medical.   No
     condition exists that would prevent the Company or any of its
     Subsidiaries from amending or terminating any Company Employee
     Plan or Company Benefit Arrangement providing health or medical
     benefits in respect of any active employee of the Company or any
     of its Subsidiaries other than limitations imposed under the terms
     of a collective bargaining agreement.  The Company has, at all
     times, reserved in the summary plan description or other plan
     document with respect to its employee health, welfare and pension
     plan, the right to amend any and all such plans with respect to
     benefits which are not vested as of the date of the amendment to
     the extent permitted by applicable law.
     
     (f) Except as disclosed in writing to Shell prior to the
     date hereof, there has been no amendment to, written
     interpretation or announcement (whether or not written) by the
     Company or any of its affiliates relating to, or change in
     employee participation or coverage under, any Company Employee
     Plan or Company Benefit Arrangement which would increase the
     expense of maintaining such Company Employee Plan or Company
     Benefit Arrangement above the level of the expense incurred in
     respect thereof for the fiscal year ended on the Company Balance
     Sheet Date by an amount which would have a Company Material
     Adverse Effect.
     
     (g) Prior to the date of this Agreement, neither the Company
     nor any of its Subsidiaries has made any representations to its
     employees as to  employment opportunities with the Shell Group or
     benefits available to them under the Shell Group employee benefit
     plans except as agreed in writing by Shell.  After the date of
     this Agreement, the Company or its Subsidiaries may make
     representations to its employees as to employment opportunities by
     Holdings or its Subsidiaries; provided that any such
     representations indicate that such employees will be employed at
     will; provided further that any such representations will not
     include any representations as to benefits available to such
     employees different from those available prior to the date of this
     Agreement except as agreed in writing by Shell and the Company.
     
     (h) The agreements listed in the letter dated the date
     hereof from the  Company to Shell constitute all agreements or
     arrangements of the Company or its Subsidiaries in effect on the
     date hereof that provide for the payment of income or the
     provision of benefits (including vesting, entitlement, receipt,
     creation or transfer of any rights, privileges, income or title to
     property or beneficial ownership) to any employees of the Company
     as a result of a change of control of the Company.  There is no
     acceleration of payments under the Annual Incentive Plan of the
     Company that would result from the Merger, nor is any forfeiture
     provision of such Annual Incentive Plan altered by the Merger. 
     The person to whom the Company granted 180,000 stock options in
     September 1997 has no right to accelerate the vesting of those
     options as a result of the Merger, and, except for a change of
     control agreement substantively identical to that of Rene Joyce,
     as of the date hereof there are no other arrangements between that
     individual and the Company that would provide for the payment of
     income or the provision of benefits (including vesting,
     entitlement, receipt, creation or transfer of any rights,
     privileges, income or title to property or beneficial ownership)
     to such individual as a result of a change of control of the
     Company.
     
     SECTION 3.14. Permits.  To the Knowledge of the Company and
     except as set forth in Schedule 3.14(1), the Company and its
     Subsidiaries have all Permits, including all certificates of
     public convenience and necessity and rate authorizations required
     by the LCC and by the FERC, as are necessary to carry on their
     businesses as currently conducted, except for any such Permits for
     which the Company has made due application and except for any such
     Permits that the failure to possess which, individually or in the
     aggregate, would not reasonably be expected to have a Company
     Material Adverse Effect.  Except as set forth in Schedule 3.14(2),
     the Company has not received notice from any Governmental
     Authority (i) that such Permits are not in full force and effect
     or have been violated, in either case in any respect that would
     reasonably be expected to have a Company Material Adverse Effect
     or (ii) threatening to suspend, revoke or suspend any such Permits
     which, in any such case, would reasonably be expected to have a
     Company Material Adverse Effect.
     
     SECTION 3.15. Required Stockholder Vote. The affirmative
     vote by stockholders of the Company Common Shares of the Company
     representing a majority of the outstanding Company Common Shares
     is the only vote of the Company stockholders required by Law for
     the adoption and approval of this Agreement, the Merger and the
     transactions contemplated hereby.
     
     SECTION 3.16. Finders' Fees. Except for the fees and
     expenses of Morgan Stanley & Co. Incorporated (a copy of whose
     engagement agreement has been provided to Shell) incurred in
     connection with the transactions contemplated hereby, which will
     be paid 50% by the Company and 50% by Shell, there is no
     investment banker, broker, finder or other intermediary which has
     been retained by or is authorized to act on behalf of the Company
     or any of its Subsidiaries who might be entitled to any fee or
     commission from Shell or any of its Subsidiaries in connection
     with the transactions contemplated by this Agreement.  The parties
     acknowledge that the Special Committee has retained Merrill Lynch
     as financial advisor and that the fees and expenses of Merrill
     Lynch will be paid by the Company.
     
     SECTION 3.17. Environmental Matters.  Except for matters
     disclosed in Schedule 3.17 and except for matters that,
     individually or in the aggregate, would not reasonably be expected
     to have a Company Material Adverse Effect, (a) to the Knowledge of
     the Company, the properties, operations and activities of the
     Company and its Subsidiaries are in compliance with all applicable
     Environmental Laws; (b) the Company and its Subsidiaries and the
     properties and operations of the Company and its Subsidiaries are
     not subject to any existing, pending or, to the Knowledge of the
     Company, threatened action, suit, or proceeding by or before any
     Court or Governmental Authority under any Environmental Law; and
     (c) all Permits, if any, required to be obtained or filed by the
     Company or any of its Subsidiaries under any Environmental Law in
     connection with the business of the Company and its Subsidiaries
     have been obtained or filed and are valid and currently in full
     force and effect.  To the Knowledge of the Company, the Company
     and its Subsidiaries have made available to Shell all material
     written internal and external environmental audits and studies in
     each case relevant to the Company and which to the Knowledge of
     the Company are in the possession of the Company or its
     Subsidiaries.
     
     SECTION 3.18.  Restrictions on Business Activities. Except
     for this Agreement, and except as set forth in Schedule 3.18,
     there is no agreement, judgment, injunction, order or decree
     binding upon the Company or any of its Subsidiaries which has or
     would reasonably be expected to have the effect of prohibiting any
     acquisition of property by the Company or any of its Subsidiaries
     or the conduct of business by the Company or any of its
     Subsidiaries as currently conducted or as proposed to be conducted
     by the Company, except for any prohibition or impairment as would
     not reasonably be expected to have a Company Material Adverse
     Effect.
     
     SECTION 3.19. Title to Property.  Except as set forth in
     Schedule 3.19 and subject to the Permitted Encumbrances and all
     Material Contracts, the Company and its Subsidiaries have good and
     valid title against any Person claiming by, through or under the
     Company to all of their properties reflected as owned by them in
     the Company 10-K or the Company 10-Q (other than any such
     properties reflected in the Company 10-K or the Company 10-Q that
     (i) have been sold or otherwise disposed of since the date of the
     Company 10-K or the Company 10-Q without breaching Section 3.10 or
     (ii) the failure to have such good and valid title would not,
     individually or in the aggregate, reasonably be expected to have a
     Company Material Adverse Effect.  Each member of the Shell Group
     acknowledges that for the assets of the Company or any of its
     Subsidiaries of which a third party is the operator, title to the
     relevant assets may be held in the names of such operator subject
     to the terms of the applicable contractual arrangements.  The
     Company or its Subsidiaries, individually or together, hold under
     valid lease agreements all real and personal properties reflected
     in the Company 10-K or the Company 10-Q as being held under
     capitalized leases, and all real and personal property that is
     subject to the operating leases to which reference is made in the
     notes to the Company 10-K or the Company 10-Q, and enjoy peaceful
     and undisturbed possession of such properties under such leases,
     other than (i) any properties as to which such leases have
     terminated in the ordinary course of business since the date of
     the Company 10-K or the Company 10-Q and (ii) any matters that,
     individually or in the aggregate, would not reasonably be expected
     to have a Company Material Adverse Effect.
     
     SECTION 3.20. Interested Party Transactions.  Except as a
     result of the transactions contemplated by this Agreement or as
     set forth in Schedule 3.20 or the Company SEC Reports, since the
     date of the Company's proxy statement  dated April 7, 1997, no
     event has occurred that would be required to be reported as a
     Certain Relationship or Related Transaction pursuant to Item 404
     of Regulation S-K promulgated by the SEC.
     
     SECTION 3.21. Insurance.  Except as disclosed in Schedule
     3.21, all insurance policies maintained by the Company or any of
     its Subsidiaries (i) are with reputable insurance carriers, (ii)
     provide adequate coverage for all normal risks incident to the
     business of the Company and its Subsidiaries and their respective
     properties and assets and (iii) are in character and amount at
     least equivalent to that carried by entities engaged in similar
     businesses and subject to the same or similar perils or hazards,
     except in each case as would not reasonably be expected to have a
     Company Material Adverse Effect.
     
     SECTION 3.22. Opinion of Financial Advisor.  The Special
     Committee has received an opinion dated September 23, 1997 of its
     financial advisor, Merrill Lynch, that, as of such date, the
     Merger Consideration was fair to the Company's stockholders from a
     financial point of view.
     
     SECTION 3.23. Intellectual Property.  (a) The Company and/or
     each of its Subsidiaries owns, or is licensed or otherwise
     possesses legally enforceable rights to use all patents,
     trademarks, trade names, service marks, copyrights, and any
     applications therefor, technology, know-how, computer software
     programs or applications, and tangible or intangible proprietary
     information or material that are used in the business of the
     Company and its Subsidiaries as currently conducted, except as
     would not reasonably be expected to have a Company Material
     Adverse Effect.
     
     (b) Except as disclosed in Schedule 3.23(b) or the Company
     SEC Reports or as would not reasonably be expected to have a
     Company Material Adverse Effect: (i) the Company is not, nor will
     it be as a result of the execution and delivery of this Agreement
     or the performance of its obligations hereunder, in violation of
     any licenses, sublicenses and other agreements as to which the
     Company is a party and pursuant to which the Company is authorized
     to use any third-party patents, trademarks, service marks and
     copyrights ("THIRD-PARTY INTELLECTUAL PROPERTY RIGHTS"); (ii) no
     claims with respect to the patents, registered and material
     unregistered trademarks and service marks, registered copyrights,
     trade names and any applications therefor owned by the Company or
     any of its Subsidiaries (the "COMPANY INTELLECTUAL PROPERTY
     RIGHTS"), any trade secret material to the Company, or Third Party
     Intellectual Property Rights to the extent arising out of any use,
     reproduction or distribution of such Third Party Intellectual
     Property Rights by or through the Company or any of its
     Subsidiaries, are currently pending or, to the Knowledge of the
     Company, are overtly threatened by any Person; and (iii) to the
     Company's knowledge, there are no valid grounds for any bona fide
     claims (A) to the effect that the manufacture, sale, licensing or
     use of any product as now used, sold or licensed or proposed for
     use, sale license by the Company or any of its Subsidiaries
     infringes on any copyright, patent, trademark, service mark or
     trade secret; (B) against the use by the Company or any of its
     Subsidiaries of any trademarks, trade names, trade secrets,
     copyrights, patents, technology, know-how or computer software
     programs and applications used in the business of the Company or
     any of its Subsidiaries as currently conducted or as proposed to
     be conducted; (C) challenging the ownership, validity or
     effectiveness of any part of the Company Intellectual Property
     Rights or other trade secret material to the Company, or (D)
     challenging the license or legally enforceable right to use of the
     Third Party Intellectual Rights by the Company or any of its
     Subsidiaries.
     
     (c) Except as set forth in Schedule 3.23(c) or the Company
     SEC Reports, and except as would not reasonably be expected to
     have a Company Material Adverse Effect, to the Company's
     Knowledge, (i) all patents, registered trademarks and copyrights
     held by the Company and its Subsidiaries are valid and subsisting,
     and (ii) there is no material unauthorized use, infringement or
     misappropriation of any of the Company Intellectual Property by
     any third party, including any employee or former employee of the
     Company or any of its Subsidiaries.
     
     SECTION 3.24. Certain Obligations.  (a) Except as set forth
     in Schedule 3.24(a)(1), except for this Agreement and the
     transactions contemplated hereby, and except for Material
     Contracts entered into after the date hereof in accordance with
     Section 5.02, neither the Company nor any of its Subsidiaries is a
     party to or bound by any Material Contract.  Except as set forth
     in Schedule 3.24(a)(2), all Material Contracts relating to the
     Company or any of its Subsidiaries are in full force and effect,
     the Company and its Subsidiaries have performed their obligations
     thereunder to date and, to the Knowledge of the Company, each
     other party thereto has performed its obligations thereunder to
     date (including, in the case of all Hydrocarbons delivered under
     any Material Contract, conforming such Hydrocarbons to the quality
     specifications of such Material Contracts and the transporting
     pipelines), other than any failure of a Material Contract to be in
     full force and effect or any nonperformance thereof that would not
     reasonably be expected to have a Company Material Adverse Effect.
     
     (b) Except as set forth in Schedule 3.24(b) and for matters
     that would not reasonably be expected to have a Company Material
     Adverse Effect, none of the Company and its Subsidiaries engages
     in any natural gas or other futures or options trading or is a
     party to any price swaps, hedges, futures or similar instruments,
     except for transactions and agreements entered into primarily to
     hedge contracts for the purchase or sale of Hydrocarbons which
     will be binding upon the Company or its Subsidiaries after
     September 1, 1997.  Schedule 3.24(b) sets forth a true and correct
     statement of the position, as of the date hereof, of the Company
     and its Subsidiaries with respect to obligations under Fixed Price
     Contracts (including, with respect to each Fixed Price Contract,
     location of delivery and variations in the obligation to take or
     deliver) and related Hydrocarbon price swaps, hedges, futures or
     similar instruments to which the Company or any of its
     Subsidiaries is a party and that are material to the Company.
     
     (c) Except as set forth in Schedule 3.24(c) or as referred
     to in the Company SEC Reports, neither the Company nor its
     Subsidiaries has entered into, or is a party to, or has any
     obligations under, any contract for the purchase of Hydrocarbons
     or other property or services that require payment be made by the
     Company or its Subsidiaries regardless of whether or not delivery
     is ever made of such Hydrocarbons or other property or services.
     
     
     SECTION 3.25.  Public Utility.  The Company is not a
     "holding company," a "subsidiary company" of a "holding company," 
     an "affiliate" of a "holding company," or a "public utility
     company," as such terms are defined in the Holding Company Act.
     
     SECTION 3.26. Takeover Statutes.  The action of the Board of
     Directors of the Company in approving the Merger, this Agreement
     and the Voting Agreements for purposes of Section 203 of the
     Delaware Law is sufficient to render inapplicable to the Merger
     and this Agreement and the Voting Agreements (and the transactions
     provided for herein and therein) the provisions of Section 203 of
     the Delaware Law.
     
     SECTION 3.27.  Minute Books.  The minute books of the
     Company (and those of its Subsidiaries for which the Company or
     its Subsidiaries maintain such minute books) that have been made
     available to Shell for review constitute all of the minute books
     of the Company and its Subsidiaries and contain a complete and
     accurate record in all material respects of all resolutions and
     formal actions of the stockholders and directors (and any
     committees thereof) of the Company and its Subsidiaries.
     

                       ARTICLE 4
     
     Warranties of Shell
     
     The Company acknowledges that it is an informed and
     sophisticated party, and has engaged expert advisors, experienced
     in the evaluation of transactions such as those contemplated by
     this Agreement.  The Company acknowledges that it has undertaken
     such investigation and has been (or will be) provided with and has
     evaluated (or will evaluate) such documents and information as it
     deems necessary to enable it to make an informed and intelligent
     decision with respect to the execution, delivery and performance
     of this Agreement.  The Company will undertake prior to the
     Effective Time such further investigation and request such
     additional documents and information as it deems necessary.  THE
     COMPANY FURTHER ACKNOWLEDGES THAT, EXCEPT AS EXPRESSLY PROVIDED IN
     THIS ARTICLE 4, SHELL AND ITS SUBSIDIARIES AND THEIR OFFICERS,
     DIRECTORS, EMPLOYEES, REPRESENTATIVES AND AGENTS (IN THEIR
     CAPACITIES AS SUCH) HAVE MADE NO, AND SHELL AND ITS SUBSIDIARIES
     HEREBY EXPRESSLY DISCLAIM ANY, REPRESENTATIONS OR WARRANTIES AS TO
     THE ACCURACY OR COMPLETENESS OF SUCH INFORMATION OR AS TO ANY
     OTHER INFORMATION, DATA OR OTHER MATERIALS (WRITTEN OR ORAL)
     FURNISHED TO THE COMPANY, OR ITS REPRESENTATIVES BY OR ON BEHALF
     OF SHELL OR ANY OF ITS SUBSIDIARIES.  IT IS EXPRESSLY UNDERSTOOD
     AND AGREED THAT NONE OF THE WARRANTIES IN THIS AGREEMENT BY SHELL
     SHALL BE DEEMED TO COVER CORAL.  Subject to the foregoing, Shell
     hereby warrants to the Company as follows:
     
     SECTION 4.01.  Corporate Existence and Power.  Each of
     Shell, Holdings and MergerSub is, and, at the Effective Time,
     Sierra Acquisition will be, a corporation or other legal entity
     duly incorporated or organized, validly existing and in good
     standing under the laws of its jurisdiction of incorporation or
     organization, and has (or will have) all corporate or entity
     powers and all governmental licenses, authorizations, consents and
     approvals required to carry on its business as now conducted,
     except to the extent the failure to have such licenses,
     authorizations, consents and approvals would not, individually or
     in the aggregate, be reasonably expected to prevent, impair or
     result in significant delay of the consummation of the Merger. 
     Shell is duly qualified to do business as a foreign corporation
     and is in good standing in each jurisdiction where the character
     of the property owned or leased by it or the nature of its
     activities makes such qualification necessary, except for those
     jurisdictions where the failure to be so qualified would not,
     individually or in the aggregate, be reasonably expected to
     prevent, impair or result in significant delay of the consummation
     of the Merger.  Shell has heretofore delivered to the Company true
     and complete copies of Holdings' and MergerSub's certificate of
     incorporation and bylaws as currently in effect.
     
     SECTION 4.02.  Corporate Authorization.  The execution,
     delivery and performance of this Agreement by each member of the
     Shell Group and the consummation by such member of the
     transactions contemplated hereby are (or, in the case of Sierra
     Acquisition, will be) within such member's corporate or other
     powers and have been (or, in the case of Sierra Acquisition, will
     be) duly authorized by all necessary corporate or other action.
     This Agreement constitutes (or in the case of Sierra Acquisition,
     will constitute) the valid and binding agreement of each member of
     the Shell Group enforceable against such member in accordance with
     its terms, subject to applicable bankruptcy, insolvency or other
     similar laws relating to or affecting the enforcement of
     creditors' rights generally and to legal principles of general
     applicability governing the application and availability of
     equitable remedies.
     
     SECTION 4.03.  Governmental Authorization.  The execution,
     delivery and performance by each member of the Shell Group of this
     Agreement and the consummation of the transactions contemplated
     hereby by such member require no action or waiting period by or in
     respect of, or filing with, any governmental body, agency,
     official or authority other than (a) the filing of a certificate
     of merger in accordance with Delaware Law; (b) compliance with any
     applicable requirements of the HSR Act; (c) compliance with any
     applicable requirements of the Securities Act, the Exchange Act or
     any Blue Sky Laws; (d) compliance with the rules and regulations
     of FERC, of the Minerals Management Service of the Department of
     the Interior and of any other Governmental Authority in Texas,
     Mississippi and Louisiana having jurisdiction, which rules and
     regulations apply generally to natural gas and natural gas liquids
     pipelines and plants; (e) compliance with Environmental Laws; and
     (f) compliance with those Laws, Regulations and Orders
     noncompliance with which would reasonably be expected to prevent,
     impair or result in significant delay of the consummation of the
     Merger.
     
     SECTION 4.04.  Non-Contravention.  The execution, delivery
     and performance by each member of the Shell Group of this
     Agreement and the consummation by each such member of the
     transactions contemplated hereby do not and will not (a)
     contravene or conflict with the certificate of incorporation or
     bylaws or other organizational documents of such member or (b)
     assuming effectuation of all filings and registrations with, the
     termination or expiration of any applicable waiting periods
     imposed by, and receipt of all Permits and Orders of, Governmental
     Authorities indicated as required in Section 4.03, (i) except as
     set forth in Schedule 4.04(i), constitute a default under or give
     rise to (A) a right of termination, cancellation, acceleration,
     amendment or modification with respect to any assets or
     liabilities of such member, (B) a loss of any benefit to which
     such member is entitled or (C) an increase in the obligations of
     such member, in each case, under any provision of any Material
     Contract of such member, which, in any such case, individually or
     in the aggregate, would prevent, impair or result in significant
     delay of the consummation of the Merger, (ii) except as set forth
     in Schedule 4.04(b)(ii), result in the creation or imposition of
     any material Lien (other than a Permitted Encumbrance) on any
     material assets of such member or (iii) except as set forth in
     Schedule 4.04(b)(iii), violate or cause a breach under any Law,
     Regulation, Order or Permit applicable to any member of the Shell
     Group, except for any such matters that would not reasonably be
     expected, individually or in the aggregate, to prevent, impair or
     result in significant delay of the consummation of the Merger.
     
     SECTION 4.05.  Disclosure Documents.  (a) Each document, if
     any, required to be filed by the Shell Group with the SEC in
     connection with the transactions contemplated by this Agreement
     (the "SHELL DISCLOSURE DOCUMENTS") will, when filed, comply as to
     form in all material respects with the applicable requirements of
     the Exchange Act and the Securities Act, except that no warranty
     is made hereby with respect to any information supplied by the
     Company expressly for inclusion in the Shell Disclosure Documents.
     
     (b) At the time the Proxy Statement or any amendment or
     supplement thereto is first mailed to stockholders of the Company
     and at the time such stockholders vote on adoption of this
     Agreement, the information supplied by the Shell Group for
     inclusion in the Proxy Statement will not contain any untrue
     statement of a material fact or omit to state any material fact
     necessary in order to make the statements made therein, in the
     light of the circumstances under which they were made, not
     misleading.
     
     SECTION 4.06. Public Utility.  Shell is not a "holding
     company," a "subsidiary company" of a "holding company,"  an
     "affiliate" of a "holding company," or a "public utility company,"
     as such terms are defined in the Holding Company Act.
     
     SECTION 4.07.  Finders' Fees.  Except for the fees and
     expenses of Morgan Stanley & Co. Incorporated (a copy of whose
     engagement agreement has been provided to the Company) incurred in
     connection with the transactions contemplated hereby, which will
     be paid 50% by the Company and 50% by Shell, there is no
     investment banker, broker, finder or other intermediary which has
     been retained by, or is authorized to act on behalf of, the Shell
     Group who might be entitled to any fee or commission from the
     Company or Holdings or any of their Subsidiaries in connection
     with the transactions contemplated by this Agreement.
     
     SECTION 4.08.  Litigation.  Except as set forth in Schedule
     4.08, as of the latest date through which Shell has supplemented
     its Schedules pursuant to Section 6.10, there is no action, suit
     or proceeding pending against, or (to the Knowledge of Shell)
     threatened against or affecting, or (to the Knowledge of Shell)
     any pending investigation against any member of the Shell Group or
     any of their respective properties before any court or arbitrator
     or any governmental body, agency or official which in any manner
     challenges or seeks to prevent, enjoin, alter or materially delay
     the Merger or any of the other transactions contemplated hereby.
     
     SECTION 4.09.  Financing.  Prior to the Effective Time,
     Shell will have available all necessary funds or financing to
     provide funds in an amount necessary to pay the aggregate Merger
     Consideration.
     
     SECTION 4.10.  Ownership of Company Common Shares.  As of
     the date of this Agreement, no member of the Shell Group nor any
     of its Affiliates beneficially owns any Company Common Shares.
     

                              ARTICLE 5

     Covenants of the Company

     SECTION 5.01.  Affirmative Covenants of the Company.  Except
     as expressly contemplated by this Agreement or consented to in
     writing by Shell, during the period from the execution of this
     Agreement by the Company to the Effective Time, the Company will,
     and will cause its Subsidiaries to:
     
     (a) operate their businesses in all material respects in the
     usual and ordinary course consistent with past practices;
     
     (b) use all reasonable efforts to preserve substantially
     intact their business organizations, maintain the rights and
     franchises that are material to the Company, retain the services
     of their officers and maintain the relationships with the
     customers and suppliers that are material to the Company;
     
     (c) maintain supplies and inventories in quantities deemed
     appropriate by the Company and maintain and keep the properties
     and assets that are material to the Company in as good repair and
     condition in all material respects as on the date of this
     Agreement, ordinary wear and tear excepted;
     
     (d) use all commercially reasonable efforts to keep in full
     force and effect insurance comparable in amount and scope of
     coverage to that set forth in Section 3.21;
     
     (e) use all commercially reasonable efforts to comply in all
     material respects with all applicable Laws, Regulations and
     Orders; and 
     
     (f) provide Shell with at least 180 days' advance written
     notice of its intent to terminate any Company Pension Plan or to
     freeze accruals thereunder.
     
     SECTION 5.02.  Negative Covenants of the Company.  Except as
     (i) expressly contemplated by this Agreement, (ii) required or
     contemplated by the partnership or joint venture agreements or
     arrangements listed in Schedule 5.02 with respect to the business,
     condition (financial or otherwise), operations, performance or
     properties of the partnerships and joint ventures created thereby,
     or (iii) otherwise consented to in writing by Shell, from the
     execution of this Agreement by the Company until the Effective
     Time, the Company will not, and will not permit any of its
     Subsidiaries to:
     
     (a) adopt or propose any change in the certificate of
     incorporation or bylaws of the Company or any of its Subsidiaries
     that are less than wholly-owned;
     
     (b)  (i) acquire, by merging or consolidating with, by
     purchasing an equity interest in or a portion of the assets of, or
     in any other manner, any business or any corporation, partnership,
     association or other business organization or division thereof, or
     (other than in the routine conduct of its business) otherwise
     acquire or agree to acquire any assets of any other Person if, in
     any such case, either (x) Shell believes, in its discretion, that
     such acquisition or agreement would delay, impede or prevent the
     consummation of the transactions contemplated by this Agreement,
     (y) such acquisition or agreement would, if consummated after the
     Effective Time, require the consent of Shell under any
     arrangements described in the memorandum of understanding (the
     "memorandum of understanding") dated the date of this Agreement
     among Shell, certain stockholders of the Company and certain other
     Persons (or in the attachments thereto) or (z) such acquisition or
     agreement would not, if consummated after the Effective Time,
     satisfy the other conditions for such acquisition or agreement set
     forth in any arrangements described in the memorandum of
     understanding (or in the attachments thereto), (ii) incur any
     Indebtedness or issue any debt securities or assume, guarantee or
     endorse or otherwise become responsible for the obligations of any
     other Person or make any loans or advances, except in each case in
     the ordinary course of business and consistent with past practice
     (for purposes hereof, ordinary course of business consistent with
     past practice includes the incurrence of Indebtedness (A) to
     finance acquisitions permitted by Section 5.02(b)(i) above, (B)
     needed to provide funds for the redemption of the Company  5-1/4%
     Preferred, (C) to acquire gas for storage in the Company's
     underground storage facilities (including payments under
     derivative instruments entered into in connection with such
     storage operations) and (D) to fund capital expenditures
     consistent with the Company's 1997 operating plan; provided that
     in the case of any Indebtedness incurred in accordance with this
     clause (ii), the Company will, to the extent commercially
     practicable, minimize any early termination costs associated with
     the Company's financing activities), (iii) make or authorize any
     capital expenditures other than capital expenditures in accordance
     with the Company's existing capital plan, capital expenditures to
     repair or replace casualty losses or other capital expenditures in
     the ordinary course of the Company's business or (iv) enter into
     or amend in any material respect any contract, agreement,
     commitment or arrangement with respect to any of the matters set
     forth in this Section 5.02(b);
     
     (c) sell, lease, license or otherwise dispose of any
     material assets or property except (i) pursuant to existing
     contracts or commitments, (ii) dispositions for fair market value
     of properties that the Company does not consider strategic in its
     business and which aggregate less than $75 million in sale
     proceeds or (iii) in the ordinary course consistent with past
     practice;
     
     (d)  (i)take or agree or commit to take any action that
     would make any warranty of the Company hereunder inaccurate in any
     respect at, or as of any time prior to, the Effective Time such
     that the conditions set forth in Section 7.02(a) would not be
     satisfied or (ii) omit or agree or commit to omit to take any
     action necessary to prevent any such warranty from being
     inaccurate in any respect at any such time such that the
     conditions set forth in Section 7.02(a) would not be satisfied;
     provided that, in each case where the covenants in this Agreement
     permit the Company and its Subsidiaries to acquire any business or
     assets they shall not be restricted by this clause from taking
     such actions so long as the Company updates any applicable
     Schedules (whether before or after November 1, 1997 so long as
     such date is no later than three (3) Business Days prior to the
     Effective Time and otherwise in accordance with and subject to
     Section 6.10) to reflect such acquisition;
     
     (e) except as set forth on Schedule 5.02(e) and except as
     contemplated by this Agreement, split, combine or reclassify any
     shares of its capital stock, declare, set aside or pay any
     dividend or other distribution (whether in cash, stock or property
     or any combination thereof) in respect of its capital stock (other
     than regular quarterly cash dividends on the Company 5-1/4%
     Preferred and the Company 9.96% Preferred, the redemption of the
     Company 5-1/4% Preferred as contemplated by this Agreement, or
     cash dividends and distributions by a wholly owned Subsidiary of
     the Company to the Company or to a Subsidiary, all of the capital
     stock of which is owned directly or indirectly by the Company), or
     redeem, repurchase or otherwise acquire or offer to redeem,
     repurchase or otherwise acquire any of its securities or any
     securities of its Subsidiaries (other than the redemption of the
     Company 5-1/4% Preferred, receipt of Company Common Shares in
     payment of the exercise price of employee or director stock
     options and Taxes in respect of such exercise and repurchases to
     fulfill the Company's matching contribution obligations under its
     401(k) plan);
     
     (f) except as set forth in Schedule 5.02(f), adopt any
     change in executive compensation except in the ordinary course
     consistent with past practices or adjust or amend any bonus,
     profit sharing, compensation, severance, termination, stock
     option, pension, retirement, deferred compensation, employment or
     employee benefit plan, agreement, trust, plan, fund or other
     arrangement for the benefit and welfare of any director, officer
     or employee (except as required to comply with ERISA or to
     continue then existing tax and securities law status);
     
     (g) revalue in any material respect any significant portion
     of its assets, including, without limitation, writing down the
     value of inventory in any material manner or writing-off of notes
     or accounts receivable in any material manner except as required
     by generally accepted accounting principles;
     
     (h) pay, discharge or satisfy any material claims,
     liabilities or obligations (whether absolute, accrued, asserted or
     unasserted, contingent or otherwise) other than the payment,
     discharge or satisfaction in the ordinary course of business,
     consistent with past practices, of liabilities reflected or
     reserved against in the consolidated financial statements of the
     Company referred to in Section 3.08 or incurred in the ordinary
     course of business, consistent with past practices;
     
     (i) make any tax election with respect to or settle or
     compromise any material income tax liability;
     
     (j) offer, sell, issue or grant, or authorize the offering,
     sale, issuance or grant, of any shares of capital stock of, or
     other equity interests in, any securities convertible into or
     exchangeable for any shares of capital stock of, or other equity
     interests (or phantom equity interests) in, or any options,
     warrants or rights of any kind to acquire any shares of capital
     stock of, or other equity interests (or phantom equity interests)
     in, the Company or any of its Subsidiaries (other than the
     issuance of Company Common Shares upon the exercise of outstanding
     options or rights or the conversion of outstanding convertible
     securities or to fund obligations under the Company's 401(k) plan
     or quarterly awards of up to $10,000 of Company Common Shares
     under the Director Stock Award Plan);
     
     (k) grant any Lien (except Permitted Encumbrances) with
     respect to any material assets including any shares of capital
     stock of, or other equity interests in, any Subsidiary of the
     Company;
     
     (l) (i)  change any of its policies or practices with
     respect to business transactions between the Company and its
     Subsidiaries, on the one hand, and the Company's Affiliates (other
     than the Company and its Subsidiaries), on the other hand, (ii)
     change any of its methods of accounting in effect at December 31,
     1996, except as may be required to comply with generally accepted
     accounting principles, or (iii) change any of its methods of
     reporting income or deductions for federal income tax purposes
     from those employed in the preparation of the federal income tax
     returns for the taxable year ending December 31, 1996, except, in
     each case, as may be required by Law and except, in the cases of
     clauses (i), (ii) and (iii), for matters that would not reasonably
     be expected to have a Company Material Adverse Effect; 
     
     (m) (i) take any action to revoke, amend or nullify the
     amendment to the Rights Plan referred to in Section 3.05(b) and
     (ii) except to the extent the Board of Directors of the Company
     deems it necessary to do so in the exercise of its fiduciary
     obligations to its stockholders based on the advice of counsel, 
     redeem or make any other amendment to its Rights Plan; 
     
     (n) enter into or adopt any new agreements or arrangements
     that provide for the payment of income or the provision of
     benefits (including vesting, entitlement, receipt, creation or
     transfer of any rights, privileges, income or title to property or
     beneficial ownership) to employees of the Company as a result of a
     change of control of the Company; or
     
     (o) agree or commit to do any of the foregoing.
     
     SECTION 5.03.  No Solicitation.  From and after the date of
     this Agreement, the Company will not, and will not authorize or
     permit any of the officers, directors, employees, agents and other
     representatives of the Company and its Subsidiaries (collectively,
     the "REPRESENTATIVES") to, directly or indirectly, solicit,
     encourage or initiate any Acquisition Proposal or negotiate with
     any prospective buyer in connection therewith; provided, however,
     that (a) nothing herein shall restrict the Company from filing a
     Current Report on Form 8-K describing this Agreement, the Merger
     and the transactions contemplated hereby and by any other
     agreements being entered into by the Company on the date of this
     Agreement (which filing may include this Agreement as an exhibit)
     promptly after the date hereof or from complying with its
     obligations under the Securities Act, the Exchange Act and any
     other applicable Law; (b) the Company's Board of Directors and/or
     the Special Committee may authorize the Company to engage in
     discussions or negotiations with any Person who (without any
     solicitation or initiation, directly or indirectly, by the Company
     or any Representative after the date of this Agreement) seeks to
     initiate such discussions or negotiations and may furnish such
     third party information concerning and access to the Company and
     its Subsidiaries and their respective businesses, properties and
     assets, and the Company's Board of Directors and/or the Special
     Committee may direct the Company's Representatives to cooperate
     with and be available to consult with any such Person; provided
     that in the case of this clause (b), the Company's Board of
     Directors and/or the Special Committee shall have determined in
     the exercise of its fiduciary duties based on the advice of its
     counsel that such action is in the best interests of the Company's
     stockholders, (c) following receipt of an Acquisition Proposal
     that is financially superior to the Merger (as determined in good
     faith by the Company's Board of Directors after consultation with
     the Company's financial advisors), the Board of Directors of the
     Company may withdraw, modify or not make its recommendation in
     favor of the Merger; provided that in the case of this clause (c),
     the Company's Board of Directors shall have concluded in good
     faith and upon advice of counsel that such action is necessary in
     order for the Company's Board of Directors to act in a manner that
     is consistent with its fiduciary obligations under applicable law
     and (d) the Company's Board of Directors may take and disclose to
     the Company's stockholders any position contemplated by Rule 14e-2(a)
     promulgated under the Exchange Act; provided that, in each
     case referred to in the foregoing clauses (a), (b), (c) and (d),
     the Company shall not engage in negotiations with, or disclose any
     nonpublic information to, any Person unless it receives from such
     Person an executed confidentiality agreement with terms, in the
     aggregate, not materially less favorable to the Company than the
     Confidentiality Agreement.  The Company shall immediately cease
     and cause to be terminated any existing solicitation of, and any
     discussion or negotiation conducted prior to the date of this
     Agreement by the Company or any of the Company's Representatives
     with respect to any Acquisition Proposal.  Except to the extent
     the Company's Board of Directors or the Special Committee deems it
     necessary not to do so in the exercise of its fiduciary
     obligations to its stockholders based on the advice of counsel,
     the Company will promptly notify Shell of the receipt of any
     Acquisition Proposal not less than two business days prior to
     entering into any agreement in connection with the Acquisition
     Proposal, including the identity of the Person or group making
     such Acquisition Proposal and the material terms and conditions of
     such Acquisition Proposal; provided that, except  to the extent
     the Company's Board of Directors deems it necessary not to do so
     in the exercise of its fiduciary obligations to its stockholders
     based on the advice of counsel, in no event shall the Company
     enter into a definitive agreement in connection with the
     Acquisition Proposal less than five business days after the
     Company's initial notification to Shell of an inquiry or proposal
     relating to an Acquisition Proposal.  Within the two-business-day
     or five-business-day period referred to above, if any, Shell may
     propose an improved transaction. 
     
     SECTION 5.04.  Settlement of Certain Claims.  Without the
     prior written agreement of Shell, prior to the Effective Time, the
     Company shall not settle or compromise any claim brought by any
     present, former or purported holder or owner of Company Common
     Shares or other securities of the Company, or by any other Person,
     which relates to or seeks to challenge or enjoin the transactions
     contemplated by this Agreement, if in any such case such
     settlement or compromise involves the payment of cash or
     securities to such Person, or an order restraining or enjoining
     the transactions contemplated by this Agreement or limiting the
     ability of any member of the Shell Group to consummate the
     transactions contemplated hereby or to exercise control of the
     business and operations of the Company and its Subsidiaries after
     the Effective Time.
     
     SECTION 5.05.  Antitakeover Statutes.  If any takeover
     statute is or may become applicable to the transactions
     contemplated hereby, the Company and the members of its Board of
     Directors shall use all reasonable efforts to grant such approvals
     and to take such actions as are necessary so that the transactions
     contemplated by this Agreement may be consummated as promptly as
     practicable on the terms contemplated hereby and otherwise act to
     eliminate or minimize the effects of any takeover statute on any
     of the transactions contemplated by this Agreement.
     
                       ARTICLE 6
                          
     Covenants of Each Party

     Each party agrees that:
     
     SECTION 6.01.  Reasonable Efforts.  (a) Subject to the terms
     and conditions of this Agreement, each party shall use, and shall
     cause each of its respective Subsidiaries to use, all commercially
     reasonable efforts (i) to take, or to cause to be taken, all
     appropriate action, and to do, or to cause to be done, all things
     necessary, proper or advisable under applicable Law or otherwise
     to consummate and make effective the transactions contemplated by
     this Agreement, (ii) to obtain from any Governmental Authorities
     any Licenses, Permits or Orders required to be obtained by such
     party or any of its Subsidiaries in connection with the
     authorization, execution and delivery of this Agreement and the
     performance of its obligations hereunder and (iii) to make all
     necessary filings and thereafter to make promptly any other
     required submissions, with respect to this Agreement required
     under (A) the HSR Act or (B) any other applicable Law, Regulation
     or Order; provided, that the Company and Shell shall cooperate
     with each other in connection with the making of all such filings
     and in supplying any information requested supplementally or by
     second request from any Governmental Authority.  The Company and
     Shell shall request early termination of the waiting period under
     the HSR Act with respect to the transactions contemplated hereby.
     
     (b) The parties agree to cooperate and to cause their
     respective Subsidiaries to cooperate with respect to, and agree to
     use all commercially reasonable efforts vigorously to contest and
     resist and to have vacated, lifted, reversed or overturned, any
     action, including legislative, administrative or judicial action,
     including any Order (whether temporary, preliminary or permanent)
     of any Governmental Authority, that is in effect and that
     restricts, prevents or prohibits the consummation of the
     transactions contemplated by this Agreement.  Each of the parties
     also agrees to take any and all commercially reasonable actions
     that may be required by any Governmental Authority as a condition
     to the granting of any Permit or Order required in order to permit
     the consummation of the transactions contemplated hereby or as may
     be required to vacate, lift, reverse or overturn any
     administrative or judicial action that would otherwise cause any
     condition to the Effective Time not to be satisfied; provided,
     however, that in no event shall any party be required to take any
     action that could reasonably be expected to have a Company
     Material Adverse Effect or to result in a breach of this
     Agreement.
     
     (c) Each of the parties shall use, and shall cause its
     Subsidiaries to use, all commercially reasonable efforts to obtain
     from all Persons (other than Governmental Authorities) all
     consents that are (i) necessary, proper or advisable or (ii)
     otherwise required under any contracts, licenses, leases,
     easements or other agreements to which such party or any of its
     Subsidiaries is a party or by which it is bound, in order to
     permit such party to perform its obligations hereunder.
     
     (d) If any party shall fail to obtain any third party
     consent described in Section 6.01(c), such party shall use all
     commercially reasonable efforts, and shall take any such actions
     reasonably requested by the other parties, to limit the adverse
     effect upon the Company and its Subsidiaries, and Shell and its
     Subsidiaries, and each of their respective businesses resulting,
     or which could reasonably be expected to result after the
     Effective Time, from the failure to obtain such consent.
     
     (e) Upon learning thereof, each party shall promptly notify
     the other parties of (i) any complaints, investigations or
     hearings (or communications indicating that the same may be
     contemplated) from or by any Governmental Authorities with respect
     to the transactions contemplated hereby or (ii) the institution or
     the threat of litigation involving this Agreement or the
     transactions contemplated hereby.
     
     SECTION 6.02.  Pending and Upcoming FERC Proceedings. 
     Except for the rate reduction filing planned for the Mississippi
     Canyon pipeline project in 1997, from the date of this Agreement
     until the Effective Time, with respect to any pending certificate
     and tariff proceedings before the FERC, Shell and the Company
     shall use reasonable efforts to consult with one another regarding
     any agreement (x) to obtain approval for rates that are less than
     the rates that have been requested in such proceedings prior to
     the date hereof or (y) to settle all or any material part of the
     issues in such proceedings, including any material issues
     regarding the appropriate rate, fuel component, rate of return or
     other cost of service or rate design aspect.
     
     SECTION 6.03.  Public Announcements.  Each party will
     consult with each other before issuing any press release or making
     any public statement with respect to this Agreement and the
     transactions contemplated hereby and, except as may be required by
     applicable Law or any listing agreement with any national
     securities exchange, will not issue any such press release or make
     any such public statement prior to such consultation; provided,
     however, that following the execution hereof the Company and Shell
     may each issue a press release in the form of Exhibit B attached
     hereto.
     
     SECTION 6.04.  Notification of Certain Matters.  Each party
     shall use all commercially reasonable efforts to give prompt
     notice to the other parties of (i) the occurrence or nonoccurrence
     of any event the occurrence or nonoccurrence of which would be
     likely to cause any warranty contained in this Agreement to be
     materially untrue or inaccurate, or (ii) any failure of any party
     materially to comply with or satisfy any covenant, condition or
     agreement to be complied with or satisfied by it hereunder;
     provided, however, that the delivery of any notice pursuant to
     this Section shall not limit or otherwise affect the remedies
     available hereunder to the parties receiving such notice; and
     provided further that failure to give such notice shall not be
     treated as a breach of covenant for the purposes of Sections
     7.02(a) or 7.03(a) hereof unless the failure to give such notice
     results in material prejudice to the other parties.
     
     SECTION 6.05.  Proxy Statement; Stockholder Meeting. (a) As
     promptly as practicable after the execution of this Agreement, the
     Company and Shell shall prepare, and the Company shall file with
     the SEC, the preliminary Proxy Statement relating to the adoption
     of this Agreement and approval of the transactions contemplated
     hereby by the stockholders of the Company, subject to Section
     5.03.  As promptly as practicable after comments are received from
     the SEC thereon and after the furnishing by the Company and Shell
     of all information required to be contained therein, the Company
     shall file with the SEC a revised Proxy Statement and will use all
     commercially reasonable efforts to have it cleared by the SEC as
     soon thereafter as practicable, subject to Section 5.03.   
     
     (b) Subject to Section 5.03, the Company shall cause a
     meeting of its stockholders (the "COMPANY STOCKHOLDER MEETING") to
     be duly called and held as soon as reasonably practicable after
     the SEC clears the Proxy Statement for the purpose of voting on
     the approval and adoption of this Agreement and the Merger and
     will (i) thereafter mail to its stockholders as promptly as
     practicable the Proxy Statement, (ii) include in the Proxy
     Statement the Board's recommendation set forth in Section 1.01(f),
     (iii) use all commercially reasonable efforts to obtain the
     necessary approval by its stockholders of this Agreement and the
     transactions contemplated hereby and (iv) otherwise comply with
     all legal requirements applicable to such meeting.
     
     SECTION 6.06.  Access to Information; Confidentiality.  (a)
     From the date of this Agreement until the Effective Time, the
     Company shall (i) afford Shell and its officers, directors,
     employees, accountants, consultants, legal counsel, agents and
     other representatives, including environmental engineers
     (collectively, the "SHELL REPRESENTATIVES"), reasonable access at
     reasonable times, upon reasonable prior notice, to the officers,
     employees, agents, properties, offices and other facilities of the
     Company and its Subsidiaries and to the books and records thereof
     and (ii) furnish promptly to Shell and the Shell Representatives
     such information concerning the business, properties, contracts,
     records and personnel of the Company and its Subsidiaries
     (including financial, operating and other data and information) as
     may be reasonably requested, from time to time, by Shell.
     
     (b) Notwithstanding the foregoing provisions of this
     Section, the Company shall not be required to (i) grant access to
     or furnish any Company Proprietary Information to Shell or any of
     the Shell Representatives or (ii) grant access or furnish
     information to Shell or any of Shell Representatives to the extent
     that such information is subject to an attorney/client or attorney
     work product privilege or that such access or the furnishing of
     such information is prohibited by Law or by a confidentiality
     agreement with a third party; provided, however, that, in the
     latter instance, if so requested by Shell, the Company will use
     all commercially reasonable efforts to obtain from such third
     party a waiver of such prohibition.
     
     SECTION 6.07.  Confidentiality Agreement.  From the date
     hereof until the Effective Time, each party shall keep all
     information received pursuant to this Agreement confidential in
     accordance with the terms of the Confidentiality Agreement.  The
     Confidentiality Agreement will expire at the Effective Time.
     
     SECTION 6.08.  No Reorganization.  It is the intention of
     the parties that the Merger will not qualify as a reorganization
     described in Section 368(a) of the Code (and any comparable
     provisions of applicable state law). The parties will not
     characterize the Merger as such a reorganization for purposes of
     any income tax returns and other filings.
     
     SECTION 6.09.  Director and Officer Liability.  The
     Surviving Corporation will indemnify and hold harmless the present
     and former officers and directors of the Company and its
     Subsidiaries (the "COVERED EMPLOYEES") in respect of acts or
     omissions occurring prior to the Effective Time to the extent
     provided under the Company's certificate of incorporation and
     bylaws in effect on the date hereof until any applicable statute
     of limitations has expired; provided that such indemnification
     shall be subject to any limitation imposed from time to time under
     applicable Law. For not less than six years after the Effective
     Time, Holdings will provide officers' and directors' liability
     insurance in respect of acts or omissions occurring prior to the
     Effective Time covering each such Person currently covered by the
     Company's officers' and directors' liability insurance policy on
     terms with respect to coverage and amount no less favorable than
     those of the Company's policy in effect on the date hereof;
     provided that in satisfying its obligation under this Section,
     Holdings shall not be obligated to pay premiums in excess of 150%
     of the amount per annum that the Company paid for this purpose in
     its last full fiscal year, which amount has been disclosed to
     Shell; but provided further, that Holdings shall be obligated to
     provide such coverage as may be obtained for such amount.  The
     provisions of this Section 6.09 are for the benefit of and may be
     enforced after the Effective Time by the Covered Employees.
     
     SECTION 6.10.  Revised Schedules.  The parties acknowledge
     that the Schedules attached to this Agreement as of the date of
     this Agreement may not be complete, and may need to be revised. 
     Accordingly, the parties agree that Shell or the Company may
     revise their respective Schedules to this Agreement by delivering
     revised Schedules to the other party at any time prior to November
     1, 1997; provided that no party will be entitled to insert generic
     exceptions to the Schedules that would modify the scope of the
     warranties or covenants set forth herein.  Any revised Schedules
     will be marked to show all additions and deletions to the previous
     Schedules.  The Company or Shell, as the case may be, shall have
     the right to review the revised Schedules for a period of 5
     business days after receipt thereof.  At any time within the 5
     business-day time period the Company or Shell, as the case may be,
     shall have the right to terminate this Agreement by notice to the
     other parties if the revised or supplemented information would
     reasonably be likely to have a Company Material Adverse Effect or
     discloses that a condition to the terminating party's obligations
     to consummate the transactions contemplated hereby is not capable
     of satisfaction.  This notice, if given, shall specify the
     information forming the basis for the decision to terminate. 
     Shell or the Company, as the case may be, shall have 10 business
     days after receipt of the notice to review with the other parties
     the information forming the basis for the decision to terminate
     and to attempt to agree on corrective measures, if any.  If the
     parties cannot agree on corrective measures within such 10
     business-day period, then this Agreement shall terminate.  If this
     Agreement is not terminated as permitted by this Section, the
     Company or Shell, as the case may be, shall be deemed to have
     accepted such revisions, and the Schedules attached to this
     Agreement as of the date hereof shall be deemed to be superseded
     by the revised Schedules (and the applicable warranties to which
     such revised Schedules refer shall be deemed qualified by the
     matters included in the applicable Schedules).
     

                       ARTICLE 7
     
     Conditions
     
     SECTION 7.01.  Conditions to the Obligations of Each Party. 
     The obligations of the Company, Shell, Sierra Acquisition,
     Holdings and MergerSub to consummate the Merger are subject to the
     satisfaction of the following conditions:
     
     (a) this Agreement and the Merger shall have been adopted
     and approved by the stockholders of the Company in accordance with
     the Delaware Law;
     
     (b) any applicable waiting period under the HSR Act relating
     to the Merger and the other transactions contemplated hereby shall
     have expired;
     
     (c) no provision of any applicable law or regulation and no
     judgment, injunction, order or decree shall prohibit the
     consummation of the Merger or the other transactions contemplated
     hereby;
     
     (d) all material actions by or in respect of or filings with
     any governmental body, agency, official or authority required to
     permit the consummation of the Merger and the other transactions
     contemplated hereby shall have been obtained; 
     
     (e) there shall not be pending any action or proceeding (or
     any investigation or other inquiry that might result in such an
     action or proceeding) by any governmental authority or
     administrative agency before any governmental authority,
     administrative agency or court of competent jurisdiction, domestic
     or foreign, nor shall there be in effect any judgment, decree or
     order of any governmental authority, administrative agency or
     court of competent jurisdiction, or any other legal restraint, (i)
     preventing or seeking to prevent consummation of the Merger or the
     other transactions contemplated hereby, (ii) prohibiting or
     seeking to prohibit or limiting or seeking to limit any party from
     exercising all material rights and privileges pertaining to its
     ownership of the Company or any of its Subsidiaries, or (iii)
     compelling or seeking to compel Shell, Holdings, the Company or
     any of their Subsidiaries to dispose of or hold separate all or
     any material portion of the business or assets of the Company or
     any of its Subsidiaries (including the Surviving Corporation and
     its Subsidiaries), in each case as a result of the Merger or the
     other transactions contemplated by this Agreement, nor shall there
     be any threat of any matter of a type referred to in clauses (ii)
     or (iii) above which would reasonably be expected to have a
     Company Material Adverse Effect; and
     
     (f)  no statute, rule, regulation or order shall be enacted,
     entered, enforced or deemed applicable to the Merger which makes
     the consummation of the transactions contemplated hereby illegal.
     
     SECTION 7.02.  Conditions to the Obligations of Shell,
     Sierra Acquisition, Holdings and MergerSub.  The obligations of
     Shell, Sierra Acquisition, Holdings and MergerSub to consummate
     the Merger and the other transactions contemplated by this
     Agreement, are subject to the satisfaction of the following
     further conditions:
     
     (a) (i) the Company shall have performed in all material
     respects all of its obligations hereunder required to be performed
     by it at or prior to the Effective Time, and (ii) except for such
     inaccuracies or omissions the consequences of which do not singly
     or in the aggregate constitute a Company Material Adverse Effect,
     the warranties of the Company contained in this Agreement and in
     any certificate or other writing delivered by the Company pursuant
     hereto shall be true in all respects at and as of the Effective
     Time as if made at and as of such time (except to the extent such
     warranty is made as of an earlier date, in which case the warranty
     shall be true in all respects as of such date) and Shell shall
     have received a certificate signed by the Chairman, the CEO or the
     Chief Financial Officer of the Company to the foregoing effect;
     
     (b) all consents, waivers, approvals, authorizations or
     orders required to be obtained, and all filings required to be
     made, by the Company for the consummation by it of the
     transactions contemplated by this Agreement shall have been
     obtained and made by the Company, except where the failure to
     receive such consents, etc. would not reasonably be expected to
     have a Company Material Adverse Effect;
     
     (c) Shell shall have received all documents it may
     reasonably request relating to the existence of the Company and
     the authority of the Company for this Agreement, all in form and
     substance satisfactory to Shell; and 
     
     (d) there shall not have been any event, occurrence or
     development since the date hereof which, individually or together
     with other similar events, has had or would reasonably be expected
     to have a Company Material Adverse Effect.
     
     SECTION 7.03.  Conditions to the Obligations of the Company.
     The obligations of the Company to consummate the Merger are
     subject to the satisfaction of the following further conditions:
     
     (a) (i) each member of the Shell Group shall have performed
     in all material respects all of its obligations hereunder required
     to be performed by it at or prior to the Effective Time, and (ii)
     except for such inaccuracies or omissions the consequences of
     which would not singly or in the aggregate reasonably be expected
     to impede the receipt of the Merger Consideration by the Company's
     stockholders, the warranties of each member of the Shell Group
     contained in this Agreement and in any certificate or other
     writing delivered by any member of the Shell Group pursuant hereto
     shall be true in all respects at and as of the Effective Time as
     if made at and as of such time (except to the extent such warranty
     is made as of an earlier date, in which case the warranty shall be
     true in all respects as of such date) and the Company shall have
     received a certificate signed by the President, any Vice President
     or the Treasurer of Shell to the foregoing effect;
     
     (b) all consents, waivers, approvals, authorizations or
     orders required to be obtained, and all filings required to be
     made, by each member of the Shell Group for the consummation by it
     of the transactions contemplated by this Agreement shall have been
     obtained and made by such member, except where the failure to
     receive such consents, etc. would not reasonably be expected to
     impede the receipt of the Merger Consideration by the Company's
     stockholders; and
     
     (c) the Company shall have received all documents it may
     reasonably request relating to the authority of each member of the
     Shell Group for this Agreement, all in form and substance
     satisfactory to the Company.
     

                       ARTICLE 8
     
     Termination
     
     SECTION 8.01.  Termination.  This Agreement may be
     terminated and the Merger and the other transactions contemplated
     by this Agreement may be abandoned at any time prior to the
     Effective Time (notwithstanding any approval of this Agreement by
     the stockholders of the Company):
     
     (a) by mutual written consent of the Company and Shell;
     
     (b) by either the Company or Shell, if the Merger has not
     been consummated by March 31, 1998;
     
     (c) by either the Company or Shell, if there shall be any
     law or regulation that makes consummation of the Merger illegal or
     otherwise prohibited or if any judgment, injunction, order or
     decree enjoining any member of the Shell Group or the Company from
     consummating the Merger is entered and such judgment, injunction,
     order or decree shall become final and nonappealable;
     
     (d) by Shell, if any Person, entity or "group" (as defined
     in Section 13(d)(3) of the Exchange Act) other than Shell and its
     Affiliates (including, for purposes of this clause only, any
     parent of Shell and its Subsidiaries) shall have increased its
     beneficial ownership (calculated in accordance with Rule 13d-3
     under the Exchange Act) of Company Common Shares by an amount
     equal to 25% or more of the outstanding Company Common Shares
     compared with its level of ownership on the date of this
     Agreement;
     
     (e) (i) by Shell if any warranty of the Company set forth in
     this Agreement shall be untrue when made such that the condition
     set forth in Section 7.02(a) would not be satisfied; provided
     that, if such warranty is curable prior to the date 60 days after
     notice to the Company by Shell of such breach, through the
     exercise by the Company of its reasonable best efforts, so that
     the condition in Section 7.02(a) would be satisfied, and for so
     long as the Company continues to exercise such reasonable best
     efforts, Shell will not have the right to terminate this Agreement
     under this Section, or (ii) by the Company if any warranty of any
     member of the Shell Group set forth in this Agreement shall be
     untrue when made such that the condition set forth in Section
     7.03(a) would not be satisfied; provided that, if such warranty is
     curable prior to the date 60 days after notice to Shell by the
     Company of such breach, through the exercise by Shell of its
     reasonable best efforts, so that the condition in Section 7.02(a)
     would be satisfied, and so long as Shell continues to exercise
     such reasonable best efforts, the Company will not have the right
     to terminate this Agreement under this Section;
     
     (f) (i) by Shell upon a breach of any covenant or agreement
     on the part of the Company set forth in this Agreement such that
     the condition set forth in Section 7.02(a) would not be satisfied;
     provided that, if such breach is curable prior to the date 60 days
     after notice to the Company by Shell of such breach, through the
     exercise by the Company of its reasonable best efforts, so that
     the condition in Section 7.02(a) would be satisfied, and for so
     long as the Company continues to exercise such reasonable best
     efforts, Shell will not have the right to terminate this Agreement
     under this Section, or (ii) by the Company upon a breach of any
     covenant or agreement on the part of Shell set forth in this
     Agreement such that the condition set forth in Section 7.03(a)
     would not be satisfied; provided that, if such breach is curable
     prior to the date 60 days after notice to Shell by the Company of
     such breach, through the exercise by Shell of its reasonable best
     efforts, so that the condition in Section 7.03(a) would be
     satisfied, and for so long as Shell continues to exercise such
     reasonable best efforts, the Company will not have the right to
     terminate this Agreement under this Section;
     
     (g) by Shell (i) if the Board of Directors of the Company
     shall have withdrawn or modified or amended, in a manner adverse
     in any material respect to Shell, its approval of this Agreement
     and the Merger or its recommendation set forth in Section 1.01(f),
     (ii) if the Board of Directors of the Company shall have approved,
     recommended or endorsed any Acquisition Proposal other than the
     Merger or (iii) if the Company shall have failed to call the
     Company Stockholders Meeting within a reasonable time after
     completion of the SEC review process or shall have failed as
     promptly as reasonably practicable thereafter to mail the Proxy
     Statement to its stockholders or (iv) if the Company shall have
     failed to include in such Proxy Statement the recommendation
     referred to above;
     
     (h) by the Company if (i) its Board of Directors determines
     in good faith (after reviewing the advice of its financial
     advisor) that an Acquisition Proposal is financially superior to
     the transactions contemplated hereby and is reasonably capable of
     being financed, (ii) the Company has complied with the
     requirements of Section 5.03, (iii) concurrently with such
     termination, the Company makes all payments required by Section
     8.03(b) and (iv) concurrently with such termination, the Company
     enters into a definitive agreement to effect the financially
     superior Acquisition Proposal;
     
     (i) by Shell or the Company if, at a duly held stockholders
     meeting of the Company or any adjournment thereof at which this
     Agreement and the Merger is voted upon, the requisite stockholder
     adoption and approval (the "STOCKHOLDER APPROVAL") shall not have
     been obtained; and
     
     (j) by Shell or the Company in accordance with Section 6.10.
     
     The party desiring to terminate this Agreement pursuant to clauses
     8.01(b) through 8.01(j) shall give written notice of such
     termination to the other parties in accordance with Section 9.01.
     
     SECTION 8.02.  Effect of Termination.  If this Agreement is
     terminated pursuant to Section 8.01, this Agreement shall become
     void and of no effect with no liability on the part of any party
     hereto, except for liability or damages resulting from a willful
     breach of this Agreement and except that the agreements contained
     in this Section 8.02 and in Sections 6.06 and 8.03 and Article 9
     shall survive the termination hereof.
     
     SECTION 8.03.  Certain Fees.  (a) Except as provided in
     Section 8.03(b) and (c), all costs and expenses incurred in
     connection with this Agreement shall be paid by the party
     incurring such cost or expense; provided, that Shell and the
     Company shall share equally all SEC filing fees and printing
     expenses incurred in connection with the printing and filing of
     the Proxy Statement (including financial statements and exhibits)
     and any amendments or supplements thereto.
     
     (b) So long as no member of the Shell Group shall have
     materially breached its warranties or obligations under this
     Agreement, the Company agrees to pay Shell a fee in immediately
     available funds equal to $25 million in the following
     circumstances and at the following times only:
          
          (i) promptly, but in no event later than two
     business days after the termination by Shell of this Agreement
     pursuant to Section 8.01(g);
          
          (ii)concurrently with any termination of this
     Agreement by the Company pursuant to Section 8.01(h); and 
          
          (iii) if Shell or the Company has terminated this
     Agreement pursuant to Section 8.01(i) and within 12 months after
     the termination of this Agreement, either (x) any Person, entity
     or "group" (as defined in Section 13(d)(3) of the Exchange Act)
     other than Shell and its Affiliates (including, for purposes only
     of this clause, any parent of Shell and its Subsidiaries) shall
     have increased its beneficial ownership (calculated in accordance
     with Rule 13d-3 under the Exchange Act) of Company Common Shares
     by an amount equal to 25% or more of the outstanding Company
     Common Shares compared with its level of ownership on the date of
     this Agreement or (y) the Company shall have entered into an
     agreement to consummate a transaction contemplated by an
     Acquisition Proposal, and such transaction shall subsequently be
     consummated, such payment to be made upon such acquisition of
     Company Common Shares or the consummation of such Acquisition
     Proposal.
     
     (c) So long as no member of the Shell Group shall have
     materially breached its warranties or obligations under this
     Agreement, the Company agrees to pay to Shell up to $5 million of
     Shell's Expenses promptly, but in no event later than two business
     days, after Shell terminates this Agreement pursuant to Section
     8.01(e) or (f).  So long as the Company shall not have materially
     breached its warranties or obligations under this Agreement, Shell
     agrees to pay to the Company up to $5 million of the Company's
     Expenses promptly, but in no event later than two business days,
     after the Company terminates this Agreement pursuant to Section
     8.01(e) or (f). 
     
                      
                       ARTICLE 9

     Miscellaneous

     SECTION 9.01.  Notices.  All notices, requests and other
     communications to any party hereunder shall be in writing
     (including telecopy or similar writing) and shall be given,

     if to Shell, Sierra Acquisition, Holdings or MergerSub, to: 
     
          President, Shell Exploration & Production Company
          Shell Oil Company
          One Shell Plaza, Room 4401
          Houston, TX 77002
          Telecopy: (713) 241-7913
     
          with a copy to:
     
          David W. Ferguson
          Davis Polk & Wardwell
          450 Lexington Avenue
          New York, New York 10017
          Telecopy: (212) 450-4800
     
          if to the Company, to:
     
          James W. Whalen
          Tejas Gas Corporation
          1301 McKinney, Suite 700
          Houston, TX 77010
          Telecopy: (713) 658-9600
     
          with a copy to:
     
          James L. Palenchar
          Bartlit Beck Herman Palenchar & Scott
          The Kittredge Building
          511 Sixteenth Street
          Denver, CO 80202
          Telecopy: (303) 592-3140
     
          to:
     
          Robert G. Stone
          Kirby Exploration
          405 Lexington Avenue
          39th Floor
          New York, NY 10174-0039
          Telecopy: (212) 687-7829
     
          and to:
     
          Richard I. Beattie
          Simpson Thacher & Bartlett 
          425 Lexington Avenue
          New York, NY 10017
          Telecopy: (212) 455-2502
     
     or such other address or telecopy number as such party may
     hereafter specify for the purpose by notice to the other parties
     hereto. Each such notice, request or other communication shall be
     effective (a) if given by telecopy, when such telecopy is
     transmitted to the telecopy number specified in this Section and
     the appropriate telecopy confirmation is received or (b) if given
     by any other means, when delivered at the address specified in
     this Section.
     
     SECTION 9.02.  Amendments; No Waivers.  (a) Any provision of
     this Agreement may be amended or waived prior to the Effective
     Time if, and only if, such amendment or waiver is in writing and
     signed, in the case of an amendment, by the parties hereto, in the
     case of a waiver, by the party against whom the waiver is to be
     effective; provided that after the adoption of this Agreement by
     the stockholders of the Company, no such amendment or waiver
     shall, without the further approval of such stockholders, alter or
     change (i) the Merger Consideration, (ii) any term of the
     certificate of incorporation of the Surviving Corporation or (iii)
     any of the terms or conditions of this Agreement if such
     alteration or change would adversely affect the holders of any
     shares of capital stock of the Company.
     
     (b) No failure or delay by any party in exercising any
     right, power or privilege hereunder shall operate as a waiver
     thereof nor shall any single or partial exercise thereof preclude
     any other or further exercise thereof or the exercise of any other
     right, power or privilege.
     
     SECTION 9.03.  Rules of Construction.  Unless the context
     otherwise requires, as used in this Agreement:  (i) all defined
     terms used herein and not otherwise defined have the meanings
     assigned to such terms in Annex I hereto, (ii) an accounting term
     not otherwise defined has the meaning ascribed to it in accordance
     with generally accepted accounting principles; (iii) "or" is not
     exclusive; (iv) "including" means "including, without limitation," 
     (v) words in the singular include the plural and words in the
     plural include the singular, and (vi) masculine pronouns shall be
     deemed to include the feminine counterpart and vice versa.
     
     SECTION 9.04.  Successors and Assigns.  The provisions of
     this Agreement shall be binding upon and inure to the benefit of
     the parties hereto and their respective successors and assigns,
     provided that no party may assign, delegate or otherwise transfer
     any of its rights or obligations under this Agreement without the
     consent of the other parties hereto.
     
     SECTION 9.05.  Governing Law; etc.  (a) Governing Law.  The
     terms of this Agreement shall be construed in accordance with and
     governed by the law of the State of Delaware (without regard to
     principles of conflict of laws).
     
     (b) Jurisdiction.  Each of the parties hereto agrees that
     any suit, action or proceeding seeking to enforce any provision
     of, or based on any matter arising out of or in connection with,
     this Agreement or the transactions contemplated hereby may be
     brought against any of the parties in the United States District
     Court for the District of Delaware or any state court sitting in
     the City of Wilmington, Delaware, and each of the parties hereby
     consents to the exclusive jurisdiction of such courts (and of the
     appropriate appellate courts) in any such suit, action, or
     proceeding and waives any objection to venue laid therein. Process
     in any suit, action or proceeding may be served on any party
     anywhere in the world, whether within or without the State of
     Delaware.  Without limiting the foregoing, each of the parties
     hereto agrees that service of process upon such party at the
     address referred to in Section 9.01, together with written notice
     of such service to such party, shall be deemed effective service
     of process upon such party.
     
     (c) Specific Performance.  Each of the parties acknowledges
     and agrees that the parties' respective remedies at law for a
     breach or threatened breach of any of the provisions of this
     agreement would be inadequate and, in recognition of that fact,
     each agrees that, in the event of a breach or threatened breach by
     any party of the provisions of this Agreement, in addition to any
     remedies at law, each party, respectively, without posting any
     bond, shall be entitled to obtain equitable relief in the form of
     specific performance, a temporary restraining order, a temporary
     or permanent injunction or any other equitable remedy which may
     then be available. 
     
     (d) Waiver of Jury Trial.  Each of the parties hereto hereby
     irrevocably waives all right to trial by jury in any action,
     proceeding or counterclaim (whether based on contract, tort or
     otherwise) arising out of or relating to this Agreement or the
     actions of any of them in the negotiation, administration,
     performance and enforcement thereof.  
     
     SECTION 9.06.  Counterparts; Effectiveness.  This Agreement
     may be signed in any number of counterparts, each of which shall
     be an original, with the same effect as if the signatures thereto
     and hereto were upon the same instrument. This Agreement shall
     become effective when each party hereto shall have received
     counterparts (or signature pages) hereof signed by all of the
     other parties hereto.
     
     SECTION 9.07.  Parties in Interest.  Except as expressly
     provided in Article 1 and Section 6.09 in this Agreement, express
     or implied, is intended to or shall confer upon any other Person,
     other than the parties hereto and their respective permitted
     successors and assigns, any right, benefit or remedy of any nature
     or kind whatsoever under or by reason of this Agreement.
     
     SECTION 9.08.  Severability.  If any provisions of this
     Agreement or the application thereof to either party or set of
     circumstances shall in any jurisdiction and to any extent, be
     finally held invalid or unenforceable, such term or provision
     shall only be ineffective as to such jurisdiction, and only to the
     extent of such invalidity or unenforceability, without
     invalidating or rendering unenforceable any other terms or
     provisions of this Agreement or under any other circumstances, and
     the parties shall negotiate in good faith a substitute provision
     which comes as close as possible to the invalidated or
     unenforceable term or provision, and which puts each party in a
     position as nearly comparable as possible to the position it would
     have been in but for the finding of invalidity or
     unenforceability, while remaining valid and enforceable.
     
     SECTION 9.09.  Entire Agreement.  This Agreement, together
     with the letter agreement dated April 15, 1997 between Shell and
     the Company (which the parties agree shall terminate as of the
     Effective Time), constitute the entire agreement among the parties
     hereto with respect to the subject matter hereof and supersede all
     prior agreements and undertakings, both written and oral, among
     the parties with respect to the subject matter hereof.
     
     SECTION 9.10.  Survival of Warranties.  The warranties
     contained herein and in any certificate or writing delivered
     pursuant hereto shall not survive the Effective Time or, if
     earlier, the termination of this Agreement.
     
     IN WITNESS WHEREOF, the parties hereto have caused this
     Agreement to be duly executed by their respective authorized
     officers as of the day and year first above written.
                         
                         TEJAS GAS CORPORATION
     
     
                         By:
                            Name:     Jay A. Precourt
                            Title:    Chief Executive Officer and
                                           President
     
                         TRANGO HOLDINGS CORPORATION
     
     
                         By:
                            Name:     Curtis R. Fraiser
                            Title:    President
     
                         SHELL OIL COMPANY
     
     
                         By:
                            Name:     Jack E. Little
                            Title:    Executive Vice President     
                            (Exploration and Production)
     
     
                         TANGO ACQUISITION CORPORATION
     
     
                         By:
                            Name:     Richard W. Bohan
                            Title:    Vice President and Secretary
     
                                                ANNEX I
     
                     DEFINED TERMS
     
     The following terms when used in the Agreement shall have the
     meanings set forth below unless the context shall otherwise
     require:
     
     "ACQUISITION PROPOSAL" shall mean any proposal or offer with
     respect to (i) a tender or exchange offer, a merger, consolidation
     or other business combination involving the Company or any of its
     Subsidiaries (including a merger of equals of the Company but
     excluding a transaction where the Company or its Subsidiaries is
     acquiring the stock or assets of another Person unless the
     transaction involves the issuance (other than in a broadly
     marketed public offering) by the Company of 20% or more of its
     outstanding Company Common Shares (or securities convertible into
     or exercisable for 20% or more of the outstanding Company Common
     Shares)), or (ii) the acquisition of an equity interest in the
     Company representing in excess of 25% of the power to vote for the
     election of a majority of directors of the Company or (iii) the
     acquisition of assets of the Company or its Subsidiaries
     (including stock of one or more Subsidiaries of the Company)
     representing 25% or more of the consolidated assets of the
     Company, in each case by any Person other than Shell or its
     Affiliates (including for purposes of this definition any parent
     of Shell or any Subsidiaries of such parent).
     
     "AFFILIATE" shall, with respect to any Person, mean any other
     Person that controls, is controlled by or is under common control
     with the former; provided that, for purposes of this Agreement,
     none of the members of the Shell Group or their Subsidiaries shall
     be considered an Affiliate of any entity that controls Shell or
     any Subsidiaries of such entity (other than the members of the
     Shell Group and their Subsidiaries), and none of the entities that
     control Shell shall be considered an Affiliate of any member of
     the Shell Group or their Subsidiaries.  The term "CONTROL" and
     correlative terms shall have the meanings ascribed to them in Rule
     405 under the Securities Act.
     
     "BLUE SKY LAWS" shall mean any applicable state securities laws.
     
     "CODE" shall mean the Internal Revenue Code of 1986, as amended,
     and the rules and regulations promulgated thereunder.
     
     "CORAL" means Coral Energy, L.P., a Delaware limited partnership.
     
     "COMPANY 10-K" means the Company's annual report on Form 10-K for
     the fiscal year ended December 31, 1996.
     
     "COMPANY EMPLOYEE PLANS" means each "EMPLOYEE BENEFIT PLAN", as
     defined in Section 3(3) of ERISA, which (i) is subject to any
     provision of ERISA and (ii) is maintained, administered or
     contributed to by the Company or any affiliate (as defined below)
     and covers any director, officer or employee or former director,
     officer or employee of the Company or of any affiliate, or under
     which the Company or any affiliate has any liability.
     
     "COMPANY INTELLECTUAL PROPERTY RIGHTS" means patents, registered 
     and material unregistered trademarks and service marks, registered
     copyrights, trade names and any applications therefor owned by the
     Company or any of its Subsidiaries.
     
     "COMPANY MATERIAL ADVERSE EFFECT"shall mean a material adverse
     effect on the condition (financial or otherwise), business, assets
     or results of operations of the Company and its Subsidiaries,
     taken as a whole, other than changes in general economic
     conditions or in the economic conditions affecting the Industry.
     
     "COMPANY MULTIEMPLOYER PLAN"means an Employee Plan that
     constitutes a "multiemployer plan" as defined in Section 3(37) or
     ERISA.
     
     "COMPANY PROPRIETARY INFORMATION" means documents containing
     operating, financial, technical or other information relating to
     the Company's evaluation of the transactions contemplated by this
     Agreement.
     
     "COMPANY REPRESENTATIVES" shall mean the officers, directors,
     employees, accountants, consultants, legal counsel, agents and
     other representatives, including environmental engineers, of the
     Company.
     
     "CONFIDENTIALITY AGREEMENT" shall mean the confidentiality
     agreement between the Company and Shell, dated as of April 15,
     1997. 
     
     "COURT" shall mean any court, federal, state or local, or
     arbitration tribunal.
     
     "ENVIRONMENTAL LAW OR LAWS" shall mean any and all laws, statutes,
     ordinances, rules, regulations, or orders of any Governmental
     Authority pertaining to the protection of the environment, as in
     effect at the applicable time and that are applicable to a
     specified Person and such Person's Subsidiaries, including the
     Clean Air Act, as amended, the Comprehensive Environmental,
     Response, Compensation, and Liability Act of 1980  ("CERCLA"), as
     amended, the Federal Water Pollution Control Act, as amended, the
     Resource Conservation and Recovery Act of 1976 ("RCRA"), as
     amended, the Safe Drinking Water Act, as amended, the Toxic
     Substances Control Act, as amended, the Hazardous & Solid Waste
     Amendments Act of 1984, as amended, the Superfund Amendments and
     Reauthorization Act of 1986, as amended, the Hazardous Materials
     Transportation Act, as amended, the Oil Pollution Act of 1990
     ("OPA"), any state laws implementing the foregoing federal laws,
     and any state laws pertaining to the handling of oil and gas
     exploration and production wastes or the use, maintenance, and
     closure of pits and impoundments, and all other environmental
     conservation or protection laws.  For purposes of the Agreement,
     "ENVIRONMENTAL LAWS" shall not include laws primarily related to
     the protection of human health and safety and the terms "hazardous
     substance" and "releases" have the meanings specified in CERCLA
     (but without regard to the exclusions set forth in the definition
     of hazardous substance); provided, however, that to the extent
     other federal laws or the laws of the state in which the property
     is located establish a meaning for "hazardous substance" or
     "release" that is broader than that specified in CERCLA, such
     broader meaning shall apply, and the term "hazardous substance"
     shall include all dehydration and treating wastes, waste (or
     spilled) oil, and waste (or spilled) petroleum products, and (to
     the extent in excess of background levels) radioactive material,
     even if such items are not classified as hazardous substances or
     wastes pursuant to CERCLA, or RCRA or the analogous statutes of
     any applicable jurisdiction.
     
     "ERISA" means the Employee Retirement Income Security Act of 1974,
     as amended.
     
     "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, as
     amended, and the rules and regulations promulgated thereunder.
     
     "EXCHANGE AGENT" means a national bank or trust company designated
     by Shell and the Company prior to the Effective Time to act as
     exchange agent in exchanging Company Common Shares for the Merger
     Consideration.
     
     "EXPENSES" shall mean all actual, documented and reasonable out-of-pocket
     expenses (including all reasonable fees and expenses of
     counsel, accountants, investment bankers, experts and consultants
     to a party hereto and its affiliates), but excluding general and
     administrative costs and overhead, incurred by a party or on its
     behalf in connection with or related to the authorization,
     preparation, negotiation, execution and performance of the
     Agreement, and all other matters related to the consummation of
     the transactions contemplated thereby.
     
     "FERC" shall mean the Federal Energy Regulatory Commission
     including its predecessor, the Federal Power Commission, and any
     successors thereto.
     
     "FIXED PRICE CONTRACTS" shall mean any contracts, commitments or
     agreements for the purchase or sale of Hydrocarbons (i) having a
     remaining term of more than sixty (60) days, wherein the purchase
     or sale price thereunder throughout part of the remaining life of
     such contract, commitment or agreement is a fixed amount or an
     amount that is otherwise reasonably determinable as of the date
     hereof pursuant to the terms of such contract, commitment or
     agreement, or (ii) which has been hedged with futures contracts or
     otherwise; provided, however, that the term Fixed Price Contracts
     will not include any contract, commitment or agreement under which
     the purchase or sales price throughout the remaining life of the
     contract, commitment or agreement is based on a market responsive
     reference price for a Hydrocarbon.
     
     "GOVERNMENTAL AUTHORITY" shall mean any federal, state or local
     governmental agency or authority (other than a Court).
     
     "HOLDING COMPANY ACT" shall mean the Public Utility Holding
     Company Act of 1935, as amended, and the rules and regulations
     promulgated thereunder.
     
     "HSR ACT" shall mean the Hart-Scott-Rodino Antitrust Improvements
     Act of 1976, as amended, and the rules and regulations promulgated
     thereunder.
     
     "HYDROCARBONS" shall mean crude oil, natural gas, natural gas
     liquids and other hydrocarbons produced from crude oil or natural
     gas.
     
     "INDUSTRY" shall mean the business of purchasing, gathering,
     processing, treating, storing, transporting and marketing natural
     gas.
     
     "IRS" shall mean the Internal Revenue Service.
     
     "KNOWLEDGE OF THE COMPANY" (and any other phrase to substantially
     similar effect) means the actual knowledge of any of J.A.
     Precourt, J.W. Whalen, R.F. Joyce, P.A. Lannie and F.T.
     Whittinghill, and with respect to (i) employee benefit matters,
     J.A. Street, (ii) Taxes, J.W. Bracewell and (iii) environmental
     matters, B. Salinas, in each case after reasonable inquiry with
     the head of the department who is principally responsible for the
     subject matter of any warranty given to the Knowledge of the
     Company.
     
     "LAW" shall mean all laws, statutes, ordinances, rules and
     regulations of the United States, any foreign country, or any
     domestic or foreign state, and any political subdivision or agency
     thereof, including all decisions of Courts having the effect of
     law in each such jurisdiction.
     
     "LCC" shall mean the Office of Conservation, Department of Natural
     Resources of the State of Louisiana, and any predecessors or
     successors thereto.
     
     "LIEN" shall mean, with respect to any asset, any mortgage,
     pledge, security interest, encumbrance, lien or charge of any kind
     (including any agreement to give any of the foregoing), any
     conditional sale or other title retention agreement, any lease in
     the nature thereof or the filing of or agreement to give any
     financing statement under the Uniform Commercial Code of any
     jurisdiction, with respect to such an asset.
     
     "MATERIAL" shall mean material to the condition (financial and
     other), results of operations or business of a specified Person
     and its Subsidiaries, if any, taken as a whole.
     
     "MATERIAL CONTRACT" shall mean, as between any Person (the
     "Disclosing Person") or any of its Subsidiaries, on the one hand,
     and any other Person other than any other member of the group
     consisting of the Disclosing Person and its Subsidiaries, on the
     other hand:
     
          (1)  Any collective bargaining agreement or other agreement
     with any labor union;
     
          (2)  Any employment or consulting agreement, contract or
     commitment between the Disclosing Person or any of its
     Subsidiaries and any employee, officer or director thereof (i)
     having more than one year to run from the date hereof, (ii)
     providing for an obligation to pay or accrue compensation of
     $250,000 or more per annum or (iii) providing for the payment or
     accrual of any additional compensation upon a change in control of
     the Disclosing Person or any of its subsidiaries or upon any
     termination of such employment or consulting relationship
     following a change in control of the Disclosing Person or any of
     its Subsidiaries;
     
          (3)  Any agency or representation agreement with any Person
     which is not terminable by the Disclosing Person or one of its
     Subsidiaries without penalty upon not more than ninety (90) days'
     notice providing for the payments to such person of $250,000 or
     more;
     
          (4)  Any partnership, joint venture or profit sharing
     agreement between the Disclosing Person or its Subsidiaries with
     any Person involving aggregate payments in excess of $500,000;
     
          (5)  Any agreement, contract, commitment, indenture or
     other instrument relating to the borrowing of money in a principal
     amount of $500,000 or more or any direct or indirect guarantee of
     any obligation of any other Person or Governmental Authority for,
     or agreement to service the repayment of, borrowed money in a
     principal amount of $500,000 or more, including any agreement or
     arrangement (i) relating to the maintenance of compensating money
     balances, (ii) with respect to lines of credit or letters of
     credit, (iii) relating to the purchase or repurchase obligations
     of any other Person or Governmental Authority, (iv) to advance or
     supply funds to or to invest in any other Person or Governmental
     Authority, (v) to pay for property, products or services of any
     other Person or Governmental Authority even if such property,
     products or services are not conveyed, delivered or rendered and
     (vi) to guarantee any lease or other similar periodic payments to
     be made by any other Person or Governmental Authority;
     
          (6)  Any lease with annual rental payments aggregating
     $500,000 or more that is not terminable without premium or penalty
     on ninety (90) days' or less notice;
     
          (7)  Any agreement, contract or commitment for the
     disposition or acquisition of any investment in any Person if such
     investment requires payment of $1 million or more;
     
          (8)  Any agreement, contract or commitment to which the
     Disclosing Person or any of its Subsidiaries is a party or by
     which any of them is bound (i) which relates to the receiving,
     storing, compressing, dehydrating, processing, purchasing,
     transporting, gathering, exchanging or sale of Hydrocarbons
     (either for the account of  the Disclosing Person or a subsidiary
     thereof) for a term in excess of one year (or that may not be
     terminated by the Disclosing Person upon notice of one year or
     less) and involving cash payment in excess of $1 million within
     any twelve-month period commencing after the date of the
     Agreement, or (ii) by which the Disclosing Person or its
     Subsidiaries has agreed to park, store, wheel, loan, exchange, or
     otherwise deal in energy, Hydrocarbons or other commodities, or to
     provide such services to others, or (iii) which is a swap,
     exchange or futures contract; or
     
          (9)  Any other agreement, contract or commitment which
     involves payment or potential payment, pursuant to the terms of
     such agreement, contract or commitment, by or to the Disclosing
     Person or any of its Subsidiaries of $1 million or more within any
     twelve month period commencing after the date of the Agreement.
     
     "NGA" shall mean the Natural Gas Act of 1938, as amended.
          
     "NGPA" shall mean the Natural Gas Policy Act of 1978, as amended.
     
     "ORDER" shall mean any judgment, order or decree of any court,
     arbitration tribunal or Governmental Authority, federal, state or
     local.
     
     "PBGC" means the Pension Benefit Guaranty Corporation.
     
     "PERMIT" shall mean any and all permits, licenses, authorizations,
     orders, certificates, registrations or other approvals granted by
     any federal, state, local or foreign Governmental Authority.
     
     "PERMITTED ENCUMBRANCES" shall mean the following:
     
          (1)  Liens for taxes, assessments and other governmental
     charges not delinquent or which are currently being contested in
     good faith by appropriate proceedings; provided that, in the
     latter case, adequate reserves shall have been set aside with
     respect thereto;
     
          (2)  all rights, if any, to consent by, required notices
     to, filings with, or other actions by any Governmental Authority
     in connection with the contribution or the operation of any
     assets;
     
          (3)  mechanics', repairmen's, employees', contractors',
     materialmen's or other similar Liens not filed of record and
     similar charges not delinquent or which are filed of record but
     are being contested in good faith by appropriate proceedings;
     provided that, in the latter case, adequate reserves shall have
     been set aside with respect thereto;
     
          (4)  Liens in respect of judgments or awards currently
     being prosecuted in good faith on an appeal or other proceeding
     for review and with respect to which a stay of execution pending
     such appeal or such proceeding for review shall have been secured;
     provided that adequate reserves shall have been set aside with
     respect thereto;
     
          (5)  easements, leases, reservations or other rights of
     others in, or minor defects and irregularities in title to,
     property or assets; provided that such easements, leases,
     reservations, rights, defects or irregularities do not materially
     impair the use of such property or assets for the purposes for
     which they are held; 
     
          (6)  any lien or privilege vested in any lessor, licensor
     or permittor for rent or other obligations, so long as the payment
     of such rent or the performance of such obligations is not
     delinquent; and
     
          (7)  any lien imposed in favor of interest owners of
     Hydrocarbon production.
     
     "PERSON" shall mean an individual, partnership, limited liability
     company, corporation, joint stock company, trust, estate, joint
     venture, association or unincorporated organization, or any other
     entity or organization, including a government or political
     subdivision or any agency or instrumentality thereof.
     
     "PIPELINE ASSETS" shall mean the pipelines, equipment, other
     tangible personal property, Easements and other similar assets and
     rights used in connection with natural gas pipeline, gathering,
     processing and storage operations.
     
     "REGULATION" shall mean any rule or regulation of any Governmental
     Authority having the effect of law.
     
     "RIGHTS PLAN" means the Rights Agreement dated as of November 11,
     1994 among the Company and Harris Trust and Savings Bank, as
     rights agent.
     
     "SECURITIES ACT" shall mean the Securities Act of 1933, as
     amended, and the rules and regulations promulgated thereunder.
     
     "SUBSIDIARY" shall mean any corporation or other entity of which
     securities or other ownership interests having ordinary voting
     power to elect a majority of the board of directors or other
     persons performing similar functions are directly or indirectly
     owned by a Person.  Coral shall not be deemed to be a Subsidiary
     of either Shell or the Company or their respective Subsidiaries.
     
     "TRC" shall mean the Texas Railroad Commission and any
     predecessors and successors thereto.
     
     Each of the following terms is defined in the Section set forth
     opposite such term:

               TERM                     SECTION
     
     affiliate                     3.13(b)
     Closing Date                  1.01(b)
     Company                       Recitals
     Company 5-1/4% Preferred      1.06
     Company 9.96% Preferred       1.02(d) 
     Company Balance Sheet         3.08
     Company Balance Sheet Date    3.08
     Company Benefit Arrangements  3.13(d)
     Company Common Shares         Recitals
     Company Disclosure Documents  3.09
     Company Pension Plans         3.13(a)
     Company Retirement Plans      3.13(b)
     Company SEC Reports           3.07(a)
     Company Securities            3.05(a)
     Company Stockholder Meeting   6.05(b)
     Company 10-K                  3.06(a)
     Company 10-Q                  3.07(a)
     Covered Employees             6.09
     Delaware Law                  1.01(a)
     Dissenting Shares             1.04
     Effective Time                1.01(c)
     Holdings                      Recitals
     Merger                        1.01(a)
     Merger Consideration          Recitals
     MergerSub                     Recitals
     Merrill Lynch                 1.01(f)
     Proxy Statement               6.05
     Representatives               5.03
     SEC                           3.07(a)
     Shell                         Recitals
     Shell Disclosure Documents    4.05
     Sierra Acquisition            Recitals
     Shell Group                   Recitals
     Shell Representatives         6.06
     Special Committee             Recitals
     Stockholder Approval          8.01(i)
     Surviving Corporation         1.01(a)
     Tax Returns                   3.12
     Taxes                         3.12
     Terminating Breach            8.01(f)
     Third-Party Intellectual Property Rights     3.23(b)
     Transfer Taxes                1.07
     Voting Agreements             Recitals
     
     
     


                                                                
                       AMENDMENT NO. 1 TO RIGHTS AGREEMENT

      AMENDMENT NO. 1, dated as of September 23, 1997 to the Rights Agreement
dated as of November 11, 1994, as amended (the "RIGHTS AGREEMENT") between TEJAS
GAS CORPORATION, a Delaware corporation (the "COMPANY"), and HARRIS TRUST AND
SAVINGS BANK, a national banking association (the "RIGHTS AGENT"). Terms used
herein and not defined herein shall have the meanings assigned to them in the
Merger Agreement (as defined below). 

                                    Recitals

      A.    The Company and the Rights Agent have heretofore executed and
entered into the Rights Agreement.

      B.    Pursuant to Section 27 of the Rights Agreement, the Company and the
Rights Agent may from time to time amend the Rights Agreement in accordance with
the provisions of Section 27 thereof.

      C.    The Company, Shell Oil Company, a Delaware corporation ("SHELL"),
Trango Holdings Corporation, a Delaware corporation ("HOLDINGS"), and Tango
Acquisition Corporation, a Delaware corporation ("MERGERSUB"), propose to enter
into a Merger Agreement dated as of the date hereof (the "MERGER AGREEMENT"),
pursuant to which MergerSub would merge with and into the Company.

      D.    In connection with the Merger Agreement, Shell proposes to enter
into Voting Agreements with certain stockholders of the Company.

      E.    In connection with the anticipated approval, execution, and delivery
of the Merger Agreement, the Board of Directors of the Company has approved, in
accordance with Section 27 of the Rights Agreement, this Amendment and has
authorized the appropriate officers of the Company to take all  appropriate
steps to execute and deliver this Amendment.

      F.    All acts necessary to make this Amendment a valid agreement
according to its terms have been performed, and the execution and delivery of
this Amendment by the Company and the Rights Agent have been in all respects
authorized by the Company and the Rights Agent.

      In consideration of the foregoing premises and mutual agreements set forth
in the Rights Agreement and this Amendment, the parties hereto agree as follows:

      1.    Amendment of Section 1(a).  Section 1(a) of the Rights Agreement is
hereby amended by adding as the final sentence thereto the following:

      Notwithstanding anything in this Agreement to the contrary, (a) no
      Person shall become an  Acquiring Person  and no  Stock Acquisition
      Date  shall be deemed to occur, and no  Beneficial Ownership  of
      securities shall be attributed to any Person, as a result of the
      execution, performance or consummation of the transactions provided
      for by the Merger Agreement dated as of September __, 1997 (the
      "MERGER AGREEMENT") among the Company, Shell Oil Company, a Delaware
      corporation ("SHELL"), Sierra Acquisition, an entity to be formed by
      Shell ("SIERRA ACQUISITION"), Trango Holdings Corporation, a
      Delaware corporation ("HOLDINGS") and Tango Acquisition Corporation,
      a Delaware corporation ("MERGERSUB") and the Voting Agreements (as
      defined in the Merger Agreement and as amended from time to time
      with the prior written consent of the Company)  in the manner
      provided for therein, including without limitation, the consummation
      of the Merger (as defined in the Merger Agreement) and (b) Shell and
      its Affiliates and Associates shall not be deemed to be  Acquiring
      Persons  for purposes of this Agreement unless they acquire
      Beneficial Ownership of 15% or more of the outstanding Common Stock
      of the Company.
            
      2.    Effectiveness.  This Amendment shall be deemed effective as of the
date first herein stated, as if executed by both parties on such date.  Except
as amended hereby, the Rights Agreement shall remain in full force and effect
and shall be otherwise unaffected hereby.

      3.    Miscellaneous.  This Amendment to the Rights Agreement shall be
governed by and construed in accordance with the laws of the State of Delaware. 
This Amendment may be executed in any number of counterparts, each of such
counterparts shall for all purposes be deemed to be an original, and all such
counterparts shall together constitute but one and the same instrument.  If any
term, provision, covenant or restriction of this Amendment is held by a court of
competent jurisdiction or other authority to be invalid, illegal, or
unenforceable, the remainder of the terms, provisions, covenants and
restrictions of this Amendment shall remain in full force and effect and shall
in no way be affected, impaired or invalidated.



      IN WITNESS WHEREOF, the parties hereto have caused this Amendment to the
Rights Agreement to be duly executed as of the date first set forth herein.

Attest:                             TEJAS GAS CORPORATION



By:                                 By:
Name:  P. Anthony Lannie            Name: James W. Whalen
Title:    Secretary                 Title:  Senior Executive Vice President

Attest:                             HARRIS TRUST AND SAVINGS
                                    BANK



By:                                 By:
Name:                               Name:
Title:                              Title:  



                                                                                






                                    James W. Whalen


          SHELL OIL COMPANY AGREES TO ACQUIRE TEJAS GAS CORPORATION --
                                                                                
                                                     
              TEJAS COMMON STOCKHOLDERS TO RECEIVE $61.50 PER SHARE
                                                                                
                                                




      Houston, September 23, 1997  -  Tejas Gas Corporation ("Tejas") (NYSE:
TEJ, TEJPR, TEJPRA) and Shell Oil Company ("Shell") announced today that they
have entered into a merger agreement pursuant to which a subsidiary of Shell
will acquire all of the outstanding common stock of Tejas for $61.50 per share
in cash, which, on a fully diluted common stock basis, would represent an
aggregate common stock  purchase price of approximately $1.45 billion.    In
addition, balance sheet debt and preferred stock of approximately $900 million
will be assumed.  Tejas  common stock closed today at  $50.00.

      The Board of Directors of Tejas, acting on the unanimous recommendation of
a special committee of the Board of Directors of Tejas, unanimously approved the
transaction and recommended that stockholders of Tejas approve and adopt the
agreement and the merger.  Certain Tejas stockholders and members of Tejas
management, who now hold approximately 19 percent of the outstanding Tejas
Common Stock, have agreed to vote in favor of the transaction.  The transaction
is subject to the approval of the Tejas stockholders, applicable regulatory
approvals and certain other conditions.

      Following the transaction, Shell s own natural gas midstream business will
be combined with the business of Tejas.  Tejas is one of the largest owners and
operators of intrastate natural gas pipelines, processing and storage facilities
in each of the States of Texas, Oklahoma and Louisiana.  Shell s natural gas
midstream business consists of offshore and onshore pipelines, gas processing
and natural gas liquids fractionation, transportation and marketing, with
facilities in Texas, Louisiana, Mississippi and the Gulf of Mexico.  The
consolidated Tejas and Shell executive and operating team will be led by Tejas 
Chief Executive Officer, Jay A. Precourt, and Tejas  Chairman of the Board,
Frederic C. Hamilton, both of whom have been with Tejas since it became a
publicly-traded company in 1988.  Two Shell Oil Company Executives, Philip J.
Carroll, the President and Chief Executive Officer of Shell Oil Company, and
Jack E. Little, President and Chief Executive Officer, Shell Exploration and
Production Company, will join the Board of the new combined business.

      Tejas currently has 20,578,467 issued and outstanding shares of Common
Stock.  Tejas also currently has outstanding 1,300,000 Depositary Shares
representing its 5-1/4% Convertible Preferred Stock; the Depositary Shares are
currently convertible into an aggregate of approximately 1.53 million shares of
Tejas Common Stock at a conversion price of approximately $42.42 per share of
Tejas Common Stock.  The merger agreement requires Tejas to redeem the 5-1/4%
Convertible Preferred Stock in accordance with its terms prior to the record
date for the Tejas stockholders meeting.  Tejas  2,000,000 Depositary Shares
representing its 9.96% Cumulative Preferred Stock will remain outstanding after
the merger.

      Tejas expects to mail a proxy statement describing the transaction to all
stockholders of Tejas upon completion of Securities and Exchange Commission
review.  The transaction is expected to close by the end of the year.
      
      Merrill Lynch & Co. served as financial advisor to the special committee
of the Board of Directors of Tejas and Goldman, Sachs & Co. advised Shell in
connection with this transaction.




Contacts:   Tejas Gas Corporation
            Jim Whalen        (713) 951-3587
            Debbie Dawson     (713) 951-3511

            Shell Oil Company
            Kitty Borah       (713) 241-4544
            Stacy Hutchinson  (713) 241-4544


                                        
                                        



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