EXHIBIT 10.8 EXECUTION COPY FIRST AMENDMENT TO GUARANTY BY MIDSTREAM ENTITIES This First Amendment dated as of October 31, 2002 (this "Amendment") to the Guaranty dated as of July 31, 2002 (as amended and modified from time to time, the "Guaranty"), is executed by certain Midstream Subsidiaries (the "Guarantors"), in favor of Citibank, N.A., as surety administrative agent ("Agent") for the benefit of the holders of the Secured Obligations. All capitalized terms used herein and not otherwise defined shall have the meanings ascribed to such terms in the Guaranty. WITNESSETH: WHEREAS, the parties hereto have agreed to amend certain provisions of the Guaranty; NOW THEREFORE, in consideration of the mutual covenants contained herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree that the Guaranty is hereby amended as follows: 1. Amendments (a) Pursuant to the terms of those two certain Consent and Waivers each dated as of September 20, 2002, by and among the Company and the other signatories thereto, the Guaranty was amended to (i) remove Williams Field Services - Gulf Coast Company, L.P., as a Guarantor and (ii) add Williams Gulf Coast Gathering Company, LLC, as a Guarantor. Pursuant to this Amendment, the following additional parties are added as Guarantors: WFS - Pipeline Company; WFS Gathering Company, L.L.C.; Williams Field Services - Matagorda Offshore Company, LLC; Williams Gas Processing - Mid Continent Region Company; WFS-OCS Gathering Co.; HI-BOL Pipeline Company; Goebel Gathering Company, L.L.C.; Williams Petroleum Services, LLC; Longhorn Enterprises of Texas, Inc.; and Williams GP LLC. (b) The second sentence of Section 1 of the Guaranty is hereby amended by adding at the end of such sentence the following proviso: "; provided that Guaranteed Obligations shall not include any increases which occur after the date hereof in the principal amount of the obligations under the Credit Documents (other than increases in the principal amount of such obligations that are provided for as of the date of the execution of this Agreement but not yet funded) and/or the commitments to advance funds or letters of credit thereunder". (c) Section 8.01 of the Guaranty is hereby amended and restated in its entirety and replaced with the following: "8.01. Amendments, Etc. Any amendment or waiver to this Guaranty shall be effective only if approved by Financial Institutions holding at least 51% of the principal amount of the Guaranteed Obligations at the time thereof and only in the specific instance and for the specific purpose for which given. Provided, however, any amendment or waiver releasing any Guarantor from any liability hereunder shall require the unanimous consent of all Financial Institutions and be effective only in the specific instance and for the specific purpose for which given. Notwithstanding the foregoing, any release of a Guarantor as permitted in Section 5.2(e) of the L/C Credit Agreement and Section 5.02(l) of the Multiyear Williams Credit Agreement (without giving effect to any amendment or waiver of such Sections except such amendments or waivers that are unanimously approved under the terms of Section 9.1 of the L/C Credit Agreement and Section 8.01 of the Multiyear Williams Credit Agreement) shall not require any consent beyond compliance with the appropriate provisions set forth in such credit agreements. No Financial Institution may be removed as a beneficiary of this Guaranty without such Financial Institution's prior written consent." (d) Section 8.06 of the Guaranty is hereby amended and restated in its entirety and replaced with the following: "Section 8.06 Incorporated Definitions and Provisions. All defined terms and other provisions that are incorporated into this Guaranty by reference to other agreements shall incorporate into this Guaranty the provisions of such other agreements that exist as of the date hereof; however, such provisions shall be automatically modified herein by any amendment or modification that takes place after the date hereof in such other referenced agreement(s)." (e) The following Section 8.08 is hereby added to the Guaranty: "Section 8.08 Joinder. Pursuant to the terms of the Credit Documents certain Subsidiaries (hereafter referred to as the "Joining Subsidiaries") may desire to or be required to join this Guaranty as Guarantors. In connection with any such joinder the Joining Subsidiary shall execute and deliver (a) a joinder agreement substantially in the form of the joinder agreement attached hereto as Schedule I and (b) authorization documentation, corporate documentation, perfection documentation and opinion letters satisfactory to the Agent reflecting the status of such Joining Subsidiary and the enforceability of such agreements with respect to such Joining Subsidiary and reasonable opinions with respect to such Joining Subsidiary." (f) A new Schedule I to the Security Agreement is hereby added which is the document attached as Schedule I hereto. 2. Conditions to Effectiveness. This Amendment shall be deemed effective (the "Effective Date") upon the satisfaction of the conditions precedent as set out in Section 3.1 of that certain Amended and Restated Credit Agreement, dated as of October 31, 2002, among Company and the Financial Institutions named therein, without giving effect to the terms of Section 3.3. 3. Governing Law. This Amendment shall be governed by, and construed and enforced in accordance with, the laws of the State of New York. -2- 4. Reference to and Effect on the Guaranty. The amendments set forth herein are limited precisely as written and shall not be deemed to be a consent or waiver to, or modification of any other term or condition in the Guaranty or any of the documents referred to therein. Except as expressly amended and consented hereby, the terms and conditions of the Guaranty shall continue in full force and effect, and as amended hereby, the Guaranty is ratified and confirmed in all respects. On and after the Effective Date, the Guaranty shall be deemed to mean the Guaranty as amended hereby. 5. Counterparts. This Amendment may be executed in several counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same agreement. Schedule I: Form of Joinder Agreement -3- IN WITNESS WHEREOF, the parties hereto, acting through their duly authorized representatives, have caused this amendment to be signed in their respective names. AGENT: CITIBANK, N.A., as Agent (as defined in the Guaranty) By /s/ Todd J. Mogil ----------------------------------------- Name: Todd J. Mogil Title: Vice President AGENT AND COLLATERAL AGENT: CITICORP USA, INC., as Agent and Collateral Agent By /s/ Todd J. Mogil ----------------------------------------- Name: Todd J. Mogil Title: Vice President BANKS AND ISSUING BANKS: CITIBANK N.A., as Issuing Bank By /s/ Todd J. Mogil ----------------------------------------- Name: Todd J. Mogil Title: Vice President CITICORP USA, INC. By /s/ Todd J. Mogil ----------------------------------------- Name: Todd J. Mogil Title: Vice President THE BANK OF NOVA SCOTIA, as Canadian Issuing Bank and Bank By: ---------------------------------------- Name: Title: SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY BANK OF AMERICA, N.A., as Issuing Bank and Bank By /s/ Claire M. Liu ----------------------------------------- Name: Claire M. Liu Title: Managing Director JP MORGAN CHASE BANK By: /s/ Robert W. Traband ----------------------------------------- Name: Robert W. Traband Title: Vice President TORONTO DOMINION (TEXAS), INC. By: /s/ Jill Hall ---------------------------------------- Name: Jill Hall Title: Vice President CREDIT LYONNAIS NEW YORK BRANCH By: /s/ Olivier Audemard ---------------------------------------- Name: Olivier Audemard Title: Senior Vice President MERRILL LYNCH CAPITAL CORP. By: /s/ Carol J. E. Feeley ---------------------------------------- Name: Carol J. E. Feeley Title: Vice President SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY LEHMAN COMMERCIAL PAPER INC. By: /s/ Francis Chang ---------------------------------------- Name: Francis Chang Title: Authorized Signatory CO-SYNDICATION AGENTS: JPMORGAN CHASE BANK (formerly known as THE CHASE MANHATTAN BANK), As Co-Syndication Agent By /s/ Robert W. Traband ----------------------------------------- Name: Robert W. Traband Title: Vice President COMMERZBANK AG, as Co-Syndication Agent By /s/ Harry Yergey ----------------------------------------- Name: Harry Yergey Title: Senior Vice Pres. and Manager By /s/ Brian Campbell ----------------------------------------- Name: Brian Campbell Title: Senior Vice President DOCUMENTATION AGENT: CREDIT LYONNAIS NEW YORK BRANCH as Documentation Agent By: /s/ Olivier Audemard ---------------------------------------- Name: Olivier Audemard Title: Senior Vice President BANKS: CITICORP, USA, INC. By /s/ Todd J. Mogil ----------------------------------------- Name: Todd J. Mogil Title: Vice President SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY THE BANK OF NOVA SCOTIA By: /s/ N. Bell ----------------------------------------- Name: N. Bell Title: Senior Manager BANK OF AMERICA, N.A. By /s/ Claire M. Liu ----------------------------------------- Name: Claire M. Liu Title: Managing Director BANK ONE, N.A. (MAIN OFFICE - CHICAGO) By /s/ Jeanie C. Gonzalez ----------------------------------------- Name: Jeanie C. Gonzalez Title: Director JPMORGAN CHASE BANK (formerly known as THE CHASE MANHATTAN BANK), By /s/ Robert W. Traband ----------------------------------------- Name: Robert W. Traband Title: Vice President COMMERZBANK AG NEW YORK AND GRAND CAYMAN BRANCHES By /s/ Brian Campbell ----------------------------------------- Name: Brian Campbell Title: Senior Vice President By /s/ W. David Suttles ----------------------------------------- Name: W. David Suttles Title: Vice President SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY CREDIT LYONNAIS NEW YORK BRANCH By: /s/ Olivier Audemard ---------------------------------------- Name: Olivier Audemard Title: Senior Vice President NATIONAL WESTMINSTER PLC By: /s/ Charles Greer ---------------------------------------- Name: Charles Greer Title: Senior Vice President ABN AMRO BANK, N.V. By /s/ Frank R. Russo, Jr. ----------------------------------------- Name: Frank R. Russo, Jr. Title: Group Vice President By /s/ Jeffrey G. White ----------------------------------------- Name: Jeffrey G. White Title: Vice President BANK OF MONTREAL By /s/ Mary Lee Latta ----------------------------------------- Name: Mary Lee Latta Title: Director THE BANK OF NEW YORK By /s/ Raymond J. Palmer ----------------------------------------- Name: Raymond J. Palmer Title: Vice President SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY BARCLAYS BANK PLC By /s/ Nicholas A. Bell ----------------------------------------- Name: Nicholas A. Bell Title: Director, Loan Transaction Management CIBC INC. By /s/ George Knight ----------------------------------------- Name: George Knight Title: Managing Director CREDIT SUISSE FIRST BOSTON By /s/ James P. Moran ----------------------------------------- Name: James P. Moran Title: Director By /s/ Ian W. Nalitt ----------------------------------------- Name: Ian W. Nalitt Title: Associate ROYAL BANK OF CANADA By /s/ Peter Barnes ----------------------------------------- Name: Peter Barnes Title: Senior Manager THE BANK OF TOKYO-MITSUBISHI, LTD., HOUSTON AGENCY By /s/ Kelton Glassock ----------------------------------------- Name: Kelton Glassock Title: Vice President and Manager By /s/ Jay Fort ----------------------------------------- Name: Jay Fort Title: Vice President SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY FLEET NATIONAL BANK f/k/a Bank Boston, N.A. By /s/ Matthew W. Speh ----------------------------------------- Name: Matthew W. Speh Title: Authorized Officer SOCIETE GENERALE, SOUTHWEST AGENCY By /s/ J. Douglas McMurrey, Jr. ----------------------------------------- Name: J. Douglas McMurrey, Jr. Title: Managing Director TORONTO DOMINION (TEXAS), INC. By: /s/ Jill Hall ----------------------------------------- Name: Jill Hall Title: Vice President UBS AG, STAMFORD BRANCH By /s/ Kelly Smith ----------------------------------------- Name: Kelly Smith Title: Director - Recovery Management By David J. Kalal ----------------------------------------- Name: David J. Kalal Title: Executive Director - Recovery Management WELLS FARGO BANK TEXAS, N.A. By /s/ J. Alan Alexander ----------------------------------------- Name: J. Alan Alexander Title: Vice President SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY WESTLB AG, NEW YORK BRANCH By /s/ Duncan M. Robertson ----------------------------------------- Name: Duncan M. Robertson Title: Director Name: Salvatore Battinelli Title: Managing Director - Credit Department CREDIT AGRICOLE INDOSUEZ By /s/ Larry Materi ----------------------------------------- Name: Larry Materi Title: Vice President By /s/ Paul A. Dytrych ----------------------------------------- Name: Paul A. Dytrych Title: Vice President, Senior Relationship Manager SUNTRUST BANK By /s/ Steven J. Newby ----------------------------------------- Name: Steven J. Newby Title: Director ARAB BANKING CORPORATION (B.S.C.) By /s/ Robert J. Ivosevich ----------------------------------------- Name: Robert J. Ivosevich Title: Deputy General Manager By /s/ Barbara C. Sanderson ----------------------------------------- Name: Barbara C. Sanderson Title: Vice President Head of Credit BANK OF CHINA, NEW YORK BRANCH By Name: Title: SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY BANK OF OKLAHOMA, N.A. By ----------------------------------------- Name: Title: BNP PARIBAS, HOUSTON AGENCY By /s/ Larry Robinson ----------------------------------------- Name: Larry Robinson Title: Vice President By /s/ Mark A. Cox ----------------------------------------- Name: Mark A. Cox Title: Director DZ BANK AG DEUTSCHE ZENTRALGENOSSENSCHAFTSBANK, NEW YORK BRANCH By /s/ Mark Connelly ----------------------------------------- Name: Mark Connelly Title: Senior V.P. By /s/ Richard W. Wilbert ----------------------------------------- Name: Richard W. Wilbert Title: Vice President KBC BANK N.V. By /s/ Michael V. Curran ----------------------------------------- Name: Michael V. Curran Title: First Vice President By /s/ Diane M. Grimmig ----------------------------------------- Name: Diane M. Grimmig Title: First Vice President WACHOVIA BANK, N.A. By: /s/ David E. Humphreys ----------------------------------------- Name: David E. Humphreys Title: Vice President SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY MIZUHO CORPORATE BANK, LTD By /s/ Jacques Azagury ----------------------------------------- Name: Jacques Azagury Title: Senior Vice President and Manager SUMITOMO MITSUI BANKING CORPORATION By /s/ Leo E. Pagarigan ----------------------------------------- Name: Leo E. Pagarigan Title: Senior Vice President COMMERCE BANK, N.A. By /s/ Dennis R. Block ----------------------------------------- Name: Dennis R. Block Title: Senior Vice President ROYAL BANK OF SCOTLAND Name: Title: RZB FINANCE, LLC By ----------------------------------------- Name: Title: SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY WORTHINGTON GENERATION, L.L.C. By: /s/ William E. Hobbs ----------------------------------------- Name: William E. Hobbs Title: President WILLIAMS REFINING & MARKETING, L.L.C. By: /s/ James G. Ivey ----------------------------------------- Name: James G. Ivey Title: Assistant Treasurer WILLIAMS PETROLEUM SERVICES, LLC By: /s/ Ralph A. Hill ----------------------------------------- Name: Ralph A. Hill Title: Senior Vice President WILLIAMS PETROLEUM PIPELINE SYSTEMS, INC. By: /s/ Ralph A. Hill ----------------------------------------- Name: Ralph A. Hill Title: Senior Vice President WILLIAMS MID-SOUTH PIPELINES, LLC By: /s/ James G. Ivey ----------------------------------------- Name: James G. Ivey Title: Assistant Treasurer SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY WILLIAMS GENERATION COMPANY-HAZLETON By: /s/ Ralph A. Hill ----------------------------------------- Name: Ralph A. Hill Title: Vice President WILLIAMS OLEFINS, L.L.C. By: /s/ James G. Ivey ----------------------------------------- Name: James G. Ivey Title: Assistant Treasurer WILLIAMS OLEFINS FEEDSTOCK PIPELINES, L.L.C. By: /s/ James G. Ivey ----------------------------------------- Name: James G. Ivey Title: Assistant Treasurer WILLIAMS NATURAL GAS LIQUIDS, INC. By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President WILLIAMS MIDSTREAM NATURAL GAS LIQUIDS, INC. By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY WILLIAMS MERCHANT SERVICES COMPANY, INC. By: /s/ William E. Hobbs ----------------------------------------- Name: William E. Hobbs Title: President WILLIAMS MEMPHIS TERMINAL, INC. By: /s/ James G. Ivey ----------------------------------------- Name: James G. Ivey Title: Assistant Treasurer WILLIAMS GULF COAST GATHERING COMPANY, LLC By: /s/ James G. Ivey ----------------------------------------- Name: James G. Ivey Title: Assistant Treasurer WILLIAMS GP, LLC By: /s/ Don R. Wellendorf ----------------------------------------- Name: Don R. Wellendorf Title: President and Chief Executive Officer WILLIAMS GENERATING MEMPHIS, LLC By: /s/ James G. Ivey ----------------------------------------- Name: James G. Ivey Title: Assistant Treasurer SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY WILLIAMS GAS PROCESSING - WAMSUTTER COMPANY. By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President WILLIAMS GAS PROCESSING COMPANY By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President WILLIAMS GAS PROCESSING - MID-CONTINENT REGION COMPANY By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President WILLIAMS FIELD SERVICES GROUP, INC. By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President WILLIAMS FIELD SERVICES COMPANY By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY WILLIAMS FIELD SERVICES - MATAGORDA OFFSHORE COMPANY, LLC By: /s/ James G. Ivey ----------------------------------------- Name: James G. Ivey Title: Assistant Treasurer WILLIAMS EXPRESS, INC. (DE) By: /s/ Ralph A. Hill ----------------------------------------- Name: Ralph A. Hill Title: Chief Executive Officer WILLIAMS EXPRESS INC. (AK) By: /s/ Ralph A. Hill ----------------------------------------- Name: Ralph A. Hill Title: Chief Executive Officer WILLIAMS ETHANOL SERVICES, INC. By: /s/ Paul W. Nelson ----------------------------------------- Name: Paul W. Nelson Title: Treasurer WILLIAMS ENERGY SERVICES, LLC By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY WILLIAMS ENERGY MARKETING & TRADING COMPANY By: /s/ William E. Hobbs ----------------------------------------- Name: William E. Hobbs Title: President WILLIAMS BIO-ENERGY, L.L.C. By: /s/ James G. Ivey ----------------------------------------- Name: James G. Ivey Title: Assistant Treasurer WILLIAMS ALASKA PIPELINE COMPANY, L.L.C. By: /s/ Ralph A. Hill ----------------------------------------- Name: Ralph A. Hill Title: Senior Vice President WILLIAMS ALASKA PETROLEUM, INC. By: /s/ Ralph A. Hill ----------------------------------------- Name: Ralph A. Hill Title: Chief Executive Officer WILLIAMS ALASKA AIR CARGO PROPERTIES, L.L.C. By: /s/ Ralph A. Hill ----------------------------------------- Name: Ralph A. Hill Title: Chief Executive Officer SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY WFS-OFFSHORE GATHERING COMPANY By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President WFS-NGL PIPELINE COMPANY, INC. By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President WFS-LIQUIDS COMPANY By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President WFS GATHERING COMPANY, L.L.C. By: /s/ James G. Ivey ----------------------------------------- Name: James G. Ivey Title: Assistant Treasurer WFS ENTERPRISES, INC. By: /s/ Mary Jane Bittick ----------------------------------------- Name: Mary Jane Bittick Title: Treasurer SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY WFS - PIPELINE COMPANY By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President WFS - OCS GATHERING CO. By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President NORTH PADRE ISLAND SPINDOWN, INC. By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President MEMPHIS GENERATION, L.L.C. By: /s/ William E. Hobbs ----------------------------------------- Name: William E. Hobbs Title: President MAPL INVESTMENTS, INC. By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY MAPCO INC. By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President LONGHORN ENTERPRISES OF TEXAS, INC. By: /s/ Ralph A. Hill ----------------------------------------- Name: Ralph A. Hill Title: Senior Vice President JUAREZ PIPELINE COMPANY By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President HI-BOL PIPELINE COMPANY By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President GOEBEL GATHERING COMPANY, L.L.C. By: /s/ James G. Ivey ----------------------------------------- Name: James G. Ivey Title: Assistant Treasurer SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY GAS SUPPLY, L.L.C. By: /s/ Ralph A. Hill ----------------------------------------- Name: Ralph A. Hill Title: Senior Vice President BLACK MARLIN PIPELINE COMPANY By: /s/ Alan S. Armstrong ----------------------------------------- Name: Alan S. Armstrong Title: Senior Vice President SIGNATURE PAGE TO FIRST AMENDMENT TO MIDSTREAM GUARANTY SCHEDULE I TO GUARANTY FORM OF JOINDER AGREEMENT JOINDER AGREEMENT (name of joining subsidiary) [_________, _____] This Joinder Agreement is entered into to join [Joining Subsidiary] as an additional guarantor to the Guaranty dated as of July 31, 2002 (as amended, supplemented or otherwise modified from time to time, the "Midstream Guaranty"), which was executed by THE WILLIAMS COMPANIES, INC. (the "Company"), a Delaware corporation, and certain Midstream Subsidiaries. [Joining Subsidiary], a [_________ corporation] (the "Subsidiary"), hereby agrees with CITIBANK, N.A., as surety administrative agent for the Financial Institution (as such term is defined in the Midstream Guaranty) as follows: All capitalized terms used herein and not defined herein shall have the meanings ascribed to such terms in the Amended and Restated Credit Agreement, dated as of October 31, 2002, by and among The Williams Companies, Inc., the various lenders as are or may become parties thereto; the Issuing Banks, and Citicorp USA, Inc., as Agent and Collateral Agent (as further amended, modified, supplemented, renewed, extended or restated from time to time, the "Credit Agreement"). In accordance with the terms of the Credit Documents and the Midstream Guaranty (collectively, the "Security Documents"), the Subsidiary hereby (a) joins the Midstream Guaranty as a party thereto and assumes all the obligations of a Guarantor thereunder, (b) agrees to be bound by the provisions of the Midstream Guaranty as if the Subsidiary had been an original party to the Midstream Guaranty, and (c) confirms that, after joining the Midstream Guaranty as set forth above, the representations and warranties set forth in each of the Credit Documents with respect to the Subsidiary are true and correct in all material respects as of the date of this Joinder Agreement. For purposes of notices under the Security Documents, the notice address for the Subsidiary may be given to the Subsidiary by providing notice addressed to [Subsidiary' Name] c/o The Williams Companies, Inc., in any manner that notice is permitted to be given to the Company pursuant to the terms of the Credit Agreement. THIS WRITTEN AGREEMENT AND THE CREDIT DOCUMENTS REPRESENT THE FINAL AGREEMENT AMONG THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS AMONG THE PARTIES. -4- IN WITNESS WHEREOF this Joinder Agreement is executed and delivered as of the ___ day of ____________, _____. [Joining Subsidiary] By: -------------------------------------- Name: ------------------------------------ Title: -----------------------------------