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>