EXHIBIT 10.6 EXECUTION COPY FIRST AMENDMENT TO GUARANTY BY WILLIAMS GAS PIPELINE COMPANY, LLC 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 Williams Gas Pipeline Company, LLC (the "Guarantor"), in favor of the Financial Institutions. 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) The second sentence of the first paragraph of the Guaranty is amended by deleting such paragraph and replacing it in its entirety with the following: "Capitalized terms used in this Guaranty but not defined herein shall have the meanings set forth for such terms in the Amended and Restated Credit Agreement dated as of October 31, 2002, executed by The Williams Companies, Inc., as borrower (the "Company"), Citicorp USA, Inc., as agent and collateral agent, Bank of America N.A. as syndication agent, Citibank, N.A., The Bank of Nova Scotia and Bank of America N.A. as issuing banks, Salomon Smith Barney Inc., as arranger, and the banks named therein (as the same may be modified, replaced, refinanced, amended or supplemented from time to time, the "New Credit Agreement"). (b) Paragraph "A" of the Introduction to the Guaranty is amended by deleting such paragraph and replacing it in its entirety with the following: "The Company and/or its Subsidiaries (i) have entered into certain financing transactions with, and (ii) prior to the date hereof, have caused certain existing letters of credit to be issued by, certain agents, lenders, financial institutions and other investors (such agents, lenders, financial institutions and investors, and, to the extent any such financing transaction consists of or includes a guaranty provided by the Company and/or its Subsidiaries, each of the beneficiaries of such guaranty (as set forth therein) and each of the entities more fully described on Schedule III -1- attached hereto (collectively, the "Financial Institutions"); provided, however, except as expressly noted on Schedule III, neither the Company nor any of its Subsidiaries shall be a deemed a "Financial Institution". Such financing transactions, including those entered into in connection with the New Credit Agreement and the existing letters of credit, are documented by certain credit, security, letter of credit and guaranty documents, all as more fully set forth on Schedule I attached hereto (collectively, as the same may be modified, replaced, refinanced, amended or supplemented from time to time, the "Credit Documents"). "Borrowers" as used herein shall mean the borrowers or guarantors under any one or more of the Credit Documents." (c) Section 6(e) of the Guaranty is hereby amended by deleting such Section and replacing it in its entirety with the following: "The Guarantor will not create, incur, assume or suffer to exist, or permit any of its Subsidiaries to create, incur, assume or suffer to exist, any Debt, except that Guarantor and its Subsidiaries may create, incur, assume and suffer to exist Debt: (i) which constitutes unsecured intercompany Indebtedness of the Guarantor or any of its Subsidiaries to the Company or to any Subsidiary of the Company, provided that such intercompany Indebtedness (x) was incurred or is incurred in the ordinary course of the business of the Guarantor or any Subsidiary and (y) is expressly subordinated to the Guaranteed Obligations (intercompany indebtedness that meets all of the requirements of this clause (i) is referred to in this Guaranty as "Acceptable Intercompany Indebtedness") or (ii) to the extent permitted by the Credit Documents (including, without limitation, Debt existing as of July 31, 2002, that is permitted pursuant to Section 5.2(p) of the New Credit Agreement or 5.02(p) of the Multiyear Williams Credit Agreement)." (d) Section 6(f) of the Guaranty is hereby amended by deleting such Section and replacing it in its entirety with the following: "The Guarantor will not create, incur, assume or suffer to exist any obligation or liability other than (i) Debt permitted under clause (i) of Section 6(e) above, (ii) this Guaranty, (iii) obligations or liabilities that are listed on Schedule II hereto, (iv) contractual obligations in the nature of indemnities or guaranties of performance entered into in the ordinary course of business in connection with the disposition of Subsidiaries or assets of Subsidiaries and (v) other obligations not exceeding $100,000 in the aggregate." (e) Section 6(h) of the Guaranty is hereby amended by deleting such Section and replacing it in its entirety with the following: -2- "Except to the extent expressly permitted by the New Credit Agreement, the Guarantor will not sell, issue or otherwise dispose of, or create, assume, incur of suffer to exist any Lien on or in respect of, or permit any of its Subsidiaries to sell, issue or otherwise dispose of or create, assume, incur or suffer to exist any Lien on or in respect of, any Equity Interests or any direct or indirect interest in any Equity Interests in any Important Subsidiary. As used herein "Important Subsidiary" means (i) any Subsidiary of the Guarantor with assets having a book value of $1,000,000,000 or more, other than Williams Gas Pipelines Central, Inc. (ii) any Subsidiary of the Guarantor, other than Williams Gas Pipelines Central, Inc., that itself (on an unconsolidated, stand alone basis) owns in excess of 5% of the book value of the Consolidated Assets of the Guarantor and its Consolidated Subsidiaries and (iii) each of TGPL, TGT, and NWP. "TGPL", "TGT", and "NWP" are used herein as defined in the Multiyear Williams Credit Agreement." (f) Section 6(i) of the Guaranty is hereby amended by inserting the following phrase at the beginning such Section: "Other than with respect to Acceptable Intercompany Indebtedness owing by the Borrower or by any Subsidiary of the Borrower to the Guarantor or any of its Subsidiaries,". (g) 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, that any amendment or waiver releasing the 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. No Financial Institution may be removed as a beneficiary of this Guaranty without such Financial Institution's prior written consent. (h) 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)." -3- (i) Schedule I to the Guaranty is hereby amended and restated in its entirety with Schedule I attached hereto. (j) A new Schedule II to the Guaranty and a new Schedule III to the Guaranty are hereby added which are the documents attached as Schedule II and Schedule III hereto. 2. Representations and Warranties. Guarantor hereby restates as of even date herewith all of the representations and warranties contained in Section 5 of the Guaranty. 3. 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. 4. Governing Law. This Amendment shall be governed by, and construed and enforced in accordance with, the laws of the State of New York. 5. 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. 6. 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: Schedule I to Guaranty Schedule II: Schedule II to Guaranty Schedule III: Schedule III to Guaranty -4- IN WITNESS WHEREOF, the parties hereto, acting through their duly authorized representatives, have caused this Amendment to be signed in their respective names. Williams Gas Pipeline Company, LLC, as Guarantor By: /s/ James G. Ivey -------------------------------------- Name: James G. Ivey ------------------------------------ Title: Assistant Treasurer ------------------------------------ [FINANCIAL INSTITUTIONS] Each of the entities reflected on the following ten (10) pages is executing this Amendment as a Financial Institution party to the Amended and Restated Credit Agreement dated as of October 31, 2002 among the Company and the Financial Institutions named therein: 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: 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 Audermard Name: Olivier Audermard Title: Senior V.P. MERRILL LYNCH CAPITAL CORP. By: /s/ Carol J.E. Feeley Name: Carol J.E. Feeley Title: Vice President LEHMAN COMMERCIAL PAPER INC. By: /s/ Francis Chang Name: Francis Chang Title: Authorized Signatory SCHEDULE I CREDIT DOCUMENTS NEW CREDIT FACILITY: Amended and Restated Credit Agreement dated as of October 31, 2002 executed by The Williams Companies, Inc., as borrower, Citicorp USA, Inc., as agent and collateral agent, Bank of America N.A. as syndication agent, Citibank, N.A. and Bank of America N.A. as issuing bank, Salomon Smith Barney Inc., as arranger, and the banks named therein. All documents, instruments, agreements, certificates and notices at any time executed and/or delivered in connection with the foregoing. PROGENY AGREEMENTS Parent Support Agreement dated as of December 23, 1998, made by The Williams Companies, Inc. in favor of Castle Associates L. P. and Colchester LLC and the other Indemnified Persons listed therein, as amended. Notwithstanding anything in the Guaranty to the contrary, for purposes of Section 8.01 of the Guaranty, the principal amount of this Progeny Facility shall equal the outstanding Unrecovered Capital of the Limited Partner plus all accrued and undistributed First Priority Return to be distributed to the Limited Partner in accordance with Section 4.01(a) of the Castle Partnership Agreement plus all other amounts then due and payable to the Limited Partner. As used herein, "Castle Partnership Agreement" means the Amended and Restated Agreement of Limited Partnership of Castle Associates L.P., dated as of December 23, 1998, by and among Garrison, L.L.C., a Delaware limited liability company, Laughton, L.L.C., a Delaware limited liability company, and Colchester LLC, a Delaware limited liability company, as amended, supplemented, amended and restated or otherwise modified from time to time. Capitalized terms used in this paragraph but not otherwise defined herein shall have the meanings ascribed in the Castle Partnership Agreement. First Amended and Restated Term Loan Agreement dated as of October 31, 2002, among The Williams Companies, Inc., as Borrower, and Credit Lyonnais New York Branch, as Administrative Agent, and the Lenders named therein, as amended. Second Amended and Restated Participation Agreement dated as of January 28, 2002, among Williams Oil Gathering, L.L.C., as Lessee, Williams Field Services Company, a Delaware corporation, as Construction Agent, The Williams Companies, Inc., a Delaware corporation, as Guarantor, Wells Fargo Bank Northwest, National Association (formerly known as First Security Bank, National Association), as Certificate Trustee, Wells Fargo Bank Nevada, N.A. (successor by merger to First Security Trust Company of Nevada), as Collateral Agent, the financial institutions named therein as the Facility Lenders and Purchasers, Bank of America, National Association, as Administrative Agent and Administrator for the CP Lender, Banc of America Facilities Leasing, L.L.C., as Arranger, Bank of Nova Scotia, as Syndication Agent, and Credit Agricole Indosuez, as Documentation Agent, as amended by the Consent and First Amendment dated as of July 31, 2002 and the Consent and Second Amendment dated as of October 31, 2002. Second Amended and Restated Participation Agreement dated as of January 28, 2002 among Williams Field Services - Gulf Coast Company, L.P., a Delaware limited partnership, as Lessee, Williams Field Services Company, a Delaware corporation, as Guarantor, Wells Fargo Bank Northwest, National Association, (formerly known as First Security National Bank , National Association), as Certificate Trustee, Wells Fargo Bank Nevada N.A., (successor by merger to First Security Trust company of Nevada), as Collateral Agent, the financial institutions named therein as Certificate Holders, Hatteras Funding Corporation, a Delaware corporation, as CP Lender, the financial institutions named therein as the Facility Lenders and Purchasers, Bank of America, National Association, as Administrative Agent and Administrator for the CP Lender, Banc of America Facilities Leasing, L.L.C., as Arranger, Bank of Nova Scotia, as Syndication Agent, and Credit Agricole Indosuez, as Documentation Agent, as amended by the Consent and First Amendment dated as of July 31, 2002 and the consent and Second Amendment dated as of October 31, 2002. $200,000,000 Term Loan Agreement dated as of January 29, 1999, among The Williams Companies, Inc., as Borrower, and Mizuho Corporate Bank, Ltd., f/k/a The Fuji Bank, Limited, as Administrative Agent, and the Banks named therein, as amended. Joint Venture Sponsor Agreement dated as of December 28, 2000, among The Williams Companies, Inc., as Sponsor and Williams Field Services Company, in favor of Prairie Wolf Investors, Arctic Fox Assets, L.L.C., Williams Energy (Canada), Inc. and the other Indemnified Persons listed therein, as amended. Notwithstanding anything in the Guaranty to the contrary, for purposes of Section 8.01 of the Guaranty, the outstanding amount of this Progeny Facility shall equal the outstanding Capital Contribution of the Joint Venture Class B Member (each as defined in the Snow Goose Company Agreement) plus the accrued and unpaid Class B Amount (as defined in the Snow Goose Company Agreement) plus all other amounts then due and payable to the Joint Venture Class B Member. As used herein, "Snow Goose Company Agreement" means the Amended and Restated Company Agreement of Snow Goose Associates, L.L.C., a Delaware limited liability company, Prairie Wolf Investors, L.L.C., a Delaware limited liability company, and Snow Goose Associates, L.L.C., a Delaware limited liability company, as amended, supplemented, amended and restated or otherwise modified from time to time. Letter of Credit and Reimbursement Agreement dated as of May 15, 1994, among Tulsa Parking Authority, The Williams Companies, Inc., Bank of Oklahoma, National Association, and Bank of America, N.A. (formerly NationsBank of Texas, N.A.), relative to Tulsa Parking Authority First Mortgage Revenue Bonds, as amended. $127,000,000 Master Agreement dated as of March 6, 2000, among The Williams Companies, Inc., as Guarantor, Williams TravelCenters, Inc. and certain other subsidiaries of The Williams Companies, Inc., as Lessees, Atlantic Financial Group, Ltd., as Lessor, SunTrust Bank, as Agent, Societe Generale, Southwest Agency, as Documentation Agent, and KBC Bank, N.V., as Syndication Agent and the Lenders named therein, as amended. PPH Sponsor Agreement dated as of December 31, 2001, by The Williams Companies, Inc., as Sponsor, in favor of Piceance Production Holdings LLC, Plowshare Investors LLC, and other Indemnified Persons listed in the agreement, as amended. Notwithstanding anything in the Guaranty to the contrary, for purposes of Section 8.01 of the Guaranty, the outstanding amount of this Progeny Facility shall equal the outstanding Contributed Capital of the Class B Preferred Member (each as defined in the PPH Company Agreement) plus the accrued and unpaid Class B Priority Return (as defined in the PPH Company Agreement) plus all other amounts then due and payable to the Class B Preferred Member. As used herein, "PPH Company Agreement" means the Amended and Restated Limited Liability Company Agreement of Piceance Production Holdings LLC, dated as of December 31, 2001, by and among, Williams Production RMT Company, a Delaware corporation, Bison Royalty LLC, a Delaware limited liability company, Plowshare Investors LLC, a Delaware limited liability company, and Piceance Production Holdings LLC, a Delaware limited liability company, as amended, supplemented, amended and restated or otherwise modified from time to time. Amended and Restated LLC Loan Agreement dated as of June 9, 2000 among Millennium Energy Fund, L.L.C. and MEF Production Payment Trust, as amended, and the Amended and Restated Notes Credit Agreement dated as of June 9, 2000 among MEF Production Payment Trust as the Borrower, certain financial institutions thereto, Credit Lyonnais as Syndication Agent, and Bank of Montreal, as Agent, and the Transaction Documents (as defined therein) related thereto. All documents, instruments, agreements, certificates and notices at any time executed and/or delivered in connection with any of the foregoing. LEGACY L/CS See Attachment 1 attached hereto. All documents, instruments, agreements, certificates and notices at any time executed and/or delivered in connection with the letters of credit described on Attachment 1. ATTACHMENT 1 [TO BE ATTACHED] SCHEDULE II CERTAIN OBLIGATIONS Obligations arising from that certain GSX Project Agreement dated April 23, 2001 among GSX Canada Limited Partnership, Georgia Strait Crossing Pipeline LP, British Columbia Hydro and Power Authority, and Williams Gas Pipeline Company, LLC, as amended from time to time, and agreements related thereto, not to exceed $3 million in the aggregate outstanding at any time. SCHEDULE III NEW CREDIT AGREEMENT 1. Citicorp USA, Inc., as Agent on behalf of the Lenders party to that certain Amended and Restated Credit Agreement dated as of October 31, 2002 by and among The Williams Companies, Inc. as Borrower, the Lenders party thereto, Citibank, N.A., Bank of America N.A. and The Bank of Nova Scotia as Issuing Banks, Bank of America N.A. as Syndication Agent, Salomon Smith Barney Inc. as Arranger, and Citicorp USA, Inc., as Agent and Collateral Agent. PROGENY FACILITIES 1. Castle Associates L.P.* and Colchester LLC and the other Indemnified Persons and Guaranteed Parties as parties to or beneficiaries of that certain Parent Support Agreement dated as of December 23, 1998 by The Williams Companies, Inc. in favor of Castle Associates L. P. and Colchester LLC and the other Indemnified Persons listed therein, as amended (the "Castle Parent Support Agreement"), and related transaction documents. Capitalized terms used but not otherwise defined in this paragraph 1 have the meanings ascribed in the Castle Parent Support Agreement. 2. Credit Lyonnais New York Branch, as Administrative Agent on behalf of the Lenders party to the First Amended and Restated Term Loan Agreement dated as of October 31, 2002 among The Williams Companies, Inc., as Borrower, and Credit Lyonnais New York Branch, as Administrative Agent, and the Lenders named therein, as amended. 3. First Security Bank, N.A. as Certificate Trustee on behalf of the Certificate Holders, Wells Fargo Bank Nevada, N.A., as Collateral Agent, and Bank of America, N.A., as Administrative Agent and Administrator under that certain Second Amended and Restated Participation Agreement, dated as of January 28, 2002, among Williams Oil Gathering, L.L.C., as Lessee, Williams Field Services Company, as Construction Agent, The Williams Companies, Inc., as Guarantor, First Security Bank, N.A. as Certificate Trustee, the Certificate Holders party thereto, Wells Fargo Bank Nevada, N.A., as Collateral Agent, Bank of America, N.A., as Administrative Agent and Administrator, as amended. 4. First Security Bank, N.A. as Certificate Trustee on behalf of the Certificate Holders, Wells Fargo Bank Nevada, N.A., as Collateral Agent, and Bank of America, N.A., as Administrative Agent and Administrator under that certain Second Amended and Restated Participation Agreement, dated as of January 28, 2002, among Williams Field Services - Gulf Coast Company, L.P., as Lessee, Williams Field Services Company, as Construction Agent, The Williams Companies, Inc., as Guarantor, First Security Bank, N.A. as Certificate Trustee, the Certificate Holders party thereto, Wells Fargo Bank Nevada, N.A., as Collateral Agent, Bank of America, N.A., as Administrative Agent and Administrator, as amended. 5. Mizuho Corporate Bank, Ltd., f/k/a The Fuji Bank, Limited, as Administrative Agent on behalf of the Banks party to the $200,000,000 Term Loan Agreement, dated as of January 29, 1999, among The Williams Companies, Inc., as Borrower, and The Fuji Bank, Limited, as Administrative Agent, and the Banks named therein, as amended. 6. Prairie Wolf Investors, L.L.C. and Snow Goose Associates, L.L.C*. and the other Indemnified Persons (as defined in the Joint Venture Sponsor Agreement) as parties to or beneficiaries of that certain Joint Venture Sponsor Agreement, dated as of December 28, 2000, among The Williams Companies, Inc., as Sponsor and Williams Field Services Company, in favor of Prairie Wolf Investors, L.L.C., Arctic Fox Assets, L.L.C., Williams Energy (Canada), Inc. and the other Indemnified Persons listed therein, as amended, and related transaction documents. 7. Tulsa Parking Authority and Bank of America, N.A. (formerly NationsBank of Texas, N.A.) as parties to that certain Letter of Credit and Reimbursement Agreement, dated as of May 15, 1994, among Tulsa Parking Authority, The Williams Companies, Inc., Bank of Oklahoma, National Association, and Bank of America, N.A. (formerly NationsBank of Texas, N.A.), relative to Tulsa Parking Authority First Mortgage Revenue Bonds, as amended, and related transaction documents. 8. Atlantic Financial Group, Ltd., as Lessor, and SunTrust Bank, as Agent on behalf of the Lenders party to that certain Master Agreement, dated as of March 6, 2000, among The Williams Companies, Inc., as Guarantor, Williams TravelCenters, Inc. and certain other subsidiaries of The Williams Companies, Inc., as Lessees, Atlantic Financial Group, Ltd., as Lessor, SunTrust Bank, as Agent, Societe Generale, Southwest Agency, as Documentation Agent, KBC Bank, N.V., as Syndication Agent, and the Lenders party thereto, as amended, and related transaction documents. 9. Piceance Production Holdings LLC*, Plowshare Investors LLC and the other Indemnified Persons (as defined in the PPH Sponsor Agreement) as parties to or beneficiaries of that certain PPH Sponsor Agreement, dated as of December 31, 2001, by The Williams Companies, Inc., as Sponsor, in favor of Piceance Production Holdings LLC, Plowshare Investors LLC, and other Indemnified Persons listed in the agreement, as amended, and related transaction documents. 10. The Guaranteed Parties under that certain Amended and Restated Payment and Performance Guaranty, Indemnity and Undertaking made by The Williams Companies, Inc. in favor of the Guaranteed Parties, dated October 31, 2002, as amended, and related transaction documents. 11. The Guaranteed Parties under that certain First Amendment to Performance Guaranty, Indemnity and Undertaking (Initial LLC Asset) made by The Williams Companies, Inc. in favor of the Guaranteed Parties, dated October 31, 2002, as amended, and related transaction documents. LEGACY L/CS 1. Each issuer of a letter of credit as set forth on Attachment 1 attached to Schedule I to the Guaranty. *Notwithstanding anything in the Guaranty to the contrary, the entities marked with an asterisk shall be deemed to be "Financial Institutions" for purposes of the Guaranty for so long as any Person not an affiliate of the Company owns an Equity Interest in such entity. THE WILLIAMS COMPANIES, INC. LEGACY LETTERS OF CREDIT - FOR PURPOSE OF PRO RATA DISTRIBUTION OF NET CASH PROCEEDS FROM ASSET SALES AS OF 10-31-02 <Table> <Caption> LETTER OF ACCOUNT CREDIT # PARTY BENEFICIARY - --------- ------- ----------- ABN-AMRO S815546 Wilpro Energy Services PIGAP II Ltd PDVSA Petroleo y Gas SA Total ABN-AMRO BANK OF AMERICA C7269699 MAPCO, Inc. Old Republic Insurance Company C7269707 MAPCO, Inc. ACE Insurance Company of Texas 3020403 WilPro Energy Services (El Furrial) Ltd Citibank, N.A. 7409323 The Williams Companies, Inc. PDVSA Petroleo y Gas, S.A. 3037033 Barrett Resources Corporation Oklahoma Tax Commission 5535821l135652 TWC Tulsa Parking Authority Total Bank of America JPMORGAN CHASE P-389157 The Williams Companies, Inc. Citicorp North America Inc. as RCE Agent (Castle) P-299538 Wilpro Energy Services (PIGAP II) Limited PDVSA Petroleo y Gas, S.A. P-219203 Williams Energy Marketing & Trading The New York Independent System Operator, Inc. P-224665 Williams Energy Marketing & Trading Royal Bank of Canada P-221802 Williams Energy Marketing & Trading California Power Exchange Corporation P-221924 The Williams Companies, Inc. National Union Fire Insurance et al P-222915 The Williams Companies, Inc. United States Fidelity & Guaranty P-225395 Williams Production RMT Co. Powder River Energy Corp. P-225403 Williams Production Mid-Continent Company U.S. Dept. of Interior Bureau of Indian Affairs Total JPMorgan Chase CITIBANK 33623046 TWC on behalf of ACCROVEN, SRL PDVSA Gas S.A. ACCRO III & IV Projects 33623048 TWC on behalf of ACCROVEN, SRL PDVSA Gas S.A. ACCRO III & IV Projects 33623049 TWC on behalf of ACCROVEN, SRL PDVSA Gas S. ACCRO III & IV Projects Total Citibank ROYAL BANK OF CANADA 1739/s19728 TWC/WGP-Alliance Canada Montreal Trust Company of Canada 1739/s19729 TWC/WGP-Alliance Canada The Bank of Nova Scotia Trust Co. of NY Total Royal Bank of Canada TORONTO DOMINION 1699 The Williams Companies, Inc. Prairie Wolf Investors Total Toronto Dominion WELLS FARGO NMS232199 Transco Energy Company Transportation Insurance Company Total Wells Fargo Total LC's Outstanding <Caption> LETTER OF EXPIRY % OF CASH CREDIT # AMOUNT DATED DATE TOTAL COLLATERAL - --------- ------ ----- ------ ----- ---------- ABN-AMRO S815546 $ 5,000,000 9/1/1999 8/29/2003 ------------- Total ABN-AMRO $ 5,000,000 3.3% $ 471,000 BANK OF AMERICA C7269699 $ 300,000 3/15/1995 3/30/2003 C7269707 $ 1,582,902 3/15/1995 3/31/2003 3020403 $ 5,652,733 11/15/1999 11/15/2002 7409323 $ 225,000 5/2/2002 5/31/2003 3037033 $ 200,000 4/16/2001 5/11/2003 5535821l135652 $ 8,608,985 5/15/1992 5/31/2003 ------------- Total Bank of America $ 16,569,620 11.0% $ 2,559,000 JPMORGAN CHASE P-389157 $ 3,800,000 12/23/1998 12/23/2002 P-299538 $ 40,000,000 4/3/2000 4/16/2003 P-219203 $ 5,500,000 11/13/2001 12/1/2002 P-224665 $ 5,000,000 4/22/2002 4/30/2003 P-221802 $ 1,000,000 2/1/2002 2/1/2003 P-221924 $ 9,010,112 2/6/2002 3/1/2003 P-222915 $ 6,650,000 3/7/2002 3/1/2003 P-225395 $ 4,000,000 5/10/2002 5/10/2004 P-225403 $ 30,000 5/13/2002 5/17/2003 ------------- Total JPMorgan Chase $ 74,990,112 49.8% $ 9,720,000 CITIBANK 33623046 $ 32,500,000 3/9/2001 1/6/2003 33623048 $ 4,000,000 3/9/2001 1/6/2003 33623049 $ 1,000,000 3/9/2001 1/6/2003 ------------- Total Citibank $ 37,500,000 24.9% $ 3,536,000 ROYAL BANK OF CANADA 1739/s19728 $ 2,789,778 12/18/2000 12/17/2002 1739/s19729 $ 2,922,000 12/18/2000 12/17/2002 ------------- Total Royal Bank of Canada $ 5,711,778 3.8% $ 547,000 TORONTO DOMINION 1699 $ 10,860,000 12/28/2000 12/28/2005 ------------- Total Toronto Dominion $ 10,860,000 7.2% $ 1,024,000 WELLS FARGO NMS232199 $ 40,000 2/2/1995 2/2/2003 ------------- Total Wells Fargo $ 40,000 0.0% $ 4,000 $ 150,671,510 100% $ 17,861,000 ============= ------------ </Table>