Document:

<PAGE>

                                                                    Exhibit 10.4

                               U.S. $1,000,000,000

                                CREDIT AGREEMENT

                             DATED AS OF MAY 3, 2004

                                      AMONG

                          THE WILLIAMS COMPANIES, INC.
                         NORTHWEST PIPELINE CORPORATION
                   TRANSCONTINENTAL GAS PIPE LINE CORPORATION
                                  AS BORROWERS

                               CITICORP USA, INC.

                  AS ADMINISTRATIVE AGENT AND COLLATERAL AGENT

                                 CITIBANK, N.A.
                              BANK OF AMERICA, N.A.

                                AS ISSUING BANKS

                                       AND

                             THE BANKS NAMED HEREIN

                                    AS BANKS

                ------------------------------------------------

                              BANK OF AMERICA, N.A.

                              AS SYNDICATION AGENT

                ------------------------------------------------

                               JPMORGAN CHASE BANK
                             THE BANK OF NOVA SCOTIA
                         THE ROYAL BANK OF SCOTLAND PLC

                           AS CO-DOCUMENTATION AGENTS

                ------------------------------------------------

                          CITIGROUP GLOBAL MARKETS INC.

                                       AND

                         BANC OF AMERICA SECURITIES LLC

                    JOINT LEAD ARRANGERS AND CO-BOOK RUNNERS

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<TABLE>
<S>                                                                                                                  <C>
                                                       ARTICLE I
                                            DEFINITIONS AND ACCOUNTING TERMS

SECTION 1.1.       Certain Defined Terms........................................................................      1
SECTION 1.2.       Computation of Time Periods..................................................................     20
SECTION 1.3.       Accounting Terms.............................................................................     20
SECTION 1.4.       Miscellaneous................................................................................     20
SECTION 1.5.       Ratings......................................................................................     20

                                                       ARTICLE II
                        AMOUNTS AND TERMS OF THE REVOLVING CREDIT ADVANCES AND LETTERS OF CREDIT

SECTION 2.1.       Revolving Credit Advances and Letters of Credit..............................................     20
SECTION 2.2.       Issuance of and Drawings and Reimbursement Under Letters of Credit...........................     21
SECTION 2.3.       Making the Revolving Credit Advances.........................................................     25
SECTION 2.4.       Reduction of the Commitments.................................................................     26
SECTION 2.5.       Prepayments..................................................................................     27
SECTION 2.6.       Increased Costs..............................................................................     28
SECTION 2.7.       Payments and Computations....................................................................     29
SECTION 2.8.       Taxes........................................................................................     30
SECTION 2.9.       Sharing of Payments, Etc.....................................................................     32
SECTION 2.10.      Evidence of Debt.............................................................................     33
SECTION 2.11.      Fees.........................................................................................     33
SECTION 2.12.      Repayment of Revolving Credit Advances.......................................................     34
SECTION 2.13.      Interest.....................................................................................     34
SECTION 2.14.      Interest Rate Determination..................................................................     35
SECTION 2.15.      Optional Conversion of Revolving Credit Advances.............................................     36
SECTION 2.16.      Illegality...................................................................................     36
SECTION 2.17.      Additional Interest on Eurodollar Rate Advances..............................................     36
SECTION 2.18.      Nature of Obligations........................................................................     37
SECTION 2.19.      Facility Increases...........................................................................     37

                                                      ARTICLE III
                                                       CONDITIONS

SECTION 3.1.       Conditions Precedent to Effectiveness of Agreement...........................................     39
SECTION 3.2.       Conditions Precedent to a Revolving Credit Advance and an Issuance of a Letter of Credit.....     41
SECTION 3.3.       Effective Date...............................................................................     42

                                                       ARTICLE IV
                                             REPRESENTATIONS AND WARRANTIES

SECTION 4.1.       Representations and Warranties of the Borrowers..............................................     42
</TABLE>

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<TABLE>
<S>                                                                                                                  <C>
                                                       ARTICLE V
                                               COVENANTS OF THE BORROWERS

SECTION 5.1.       Affirmative Covenants........................................................................     46
SECTION 5.2.       Negative Covenants...........................................................................     53

                                                       ARTICLE VI
                                                   EVENTS OF DEFAULT

SECTION 6.1.       Events of Default............................................................................     59
SECTION 6.2.       LC Cash Collateral Accounts..................................................................     61

                                                      ARTICLE VII
                                   THE AGENT; THE COLLATERAL AGENT; AND ISSUING BANKS

SECTION 7.1.       Agent's and Collateral Agent's Authorization and Action......................................     62
SECTION 7.2.       Agent's and Collateral Agent's Reliance, Etc.................................................     62
SECTION 7.3.       Issuing Banks' Reliance, Etc.................................................................     63
SECTION 7.4.       Rights.......................................................................................     64
SECTION 7.5.       Indemnification..............................................................................     64
SECTION 7.6.       Successor Agent and Collateral Agent.........................................................     65
SECTION 7.7.       Bank Credit Decision.........................................................................     65
SECTION 7.8.       Certain Rights of the Collateral Agent.......................................................     66
SECTION 7.9.       Other Agents.................................................................................     66

                                                      ARTICLE VIII
                                                     MISCELLANEOUS

SECTION 8.1.       Amendments, Etc..............................................................................     66
SECTION 8.2.       Notices, Etc.................................................................................     67
SECTION 8.3.       No Waiver; Remedies..........................................................................     69
SECTION 8.4.       Costs and Expenses...........................................................................     69
SECTION 8.5.       Binding Effect; Transfers....................................................................     70
SECTION 8.6.       Governing Law................................................................................     73
SECTION 8.7.       Interest.....................................................................................     73
SECTION 8.8.       Execution in Counterparts....................................................................     74
SECTION 8.9.       Survival of Agreements, Representations and Warranties, Etc..................................     74
SECTION 8.10.      Confidentiality..............................................................................     74
SECTION 8.11.      Waiver of Jury Trial.........................................................................     75
SECTION 8.12.      Severability.................................................................................     75
SECTION 8.13.      Forum Selection and Consent to Jurisdiction; Damages.........................................     75
SECTION 8.14.      Right of Set-off.............................................................................     76
SECTION 8.15.      Termination of Security Documents and Guaranties.............................................     76
</TABLE>

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                             Schedules and Exhibits

Schedule I         Bank Information
Schedule II        Notice Information for the Borrowers
Schedule III       Commitments
Schedule IV        Applicable Commitment Fee and Applicable Margin
Schedule V         Excluded Assets
Schedule VI        Existing Projects
Schedule VII       Existing Letters of Credit
Schedule VIII      Existing Tolling Arrangements
Schedule IX-1      Collateral Permitted Liens
Schedule IX-2      General Permitted Liens
Schedule X         Echo Springs Description
Schedule XI        Wamsutter Gathering System Description
Schedule XII       Sale Leaseback Excluded Property
Schedule XIII      Existing Financing Transactions
Schedule XIV       Prior Instruments

Exhibit A          Opinion of James J. Bender, Esq., General Counsel of TWC
Exhibit B          Opinion of Gibson, Dunn & Crutcher
Exhibit C          Form of Transfer Agreement
Exhibit D-1        Notice of Letter of Credit
Exhibit D-2        Notice of Revolving Credit Borrowing
Exhibit E-1        Form of Pipeline Holdco Guaranty
Exhibit E-2        Form of Western Midstream Guaranty
Exhibit F          Form of Pledge
Exhibit G          Form of Security Agreement
Exhibit H          Form of Real Property Mortgage
Exhibit I          Form of Note
Exhibit J          Form of Revolving Credit Facility Increase Notice
Exhibit K          Form of Letter of Credit Facility Increase Notice
Exhibit L-1        Form of New Revolving Bank Agreement
Exhibit L-2        Form of Revolving Credit Commitment Increase Agreement
Exhibit L-3        Form of New Issuing Bank Agreement
Exhibit L-4        Form of Letter of Credit Commitment Increase Agreement
Exhibit M          Form of Perfection Certificate

                                      -iii-
<PAGE>

                                CREDIT AGREEMENT

      This Credit Agreement dated as of May 3, 2004 (as may be further amended,
modified, supplemented, renewed, extended or restated from time to time, this
"Agreement"), is by and among THE WILLIAMS COMPANIES, INC., a Delaware
corporation ("TWC"), NORTHWEST PIPELINE CORPORATION, a Delaware corporation
("NWP"), TRANSCONTINENTAL GAS PIPE LINE CORPORATION, a Delaware corporation
("TGPL", and together with TWC and NWP, the "Borrowers" and each, a "Borrower"),
the banks, financial institutions and other institutional lenders listed on the
signature pages hereof as banks (the "Banks"), CITIBANK, N.A. ("Citibank") and
BANK OF AMERICA, N.A. (each, an "Issuing Bank"), and CITICORP USA, INC.
("CUSA"), as agent (together with any successor agent appointed pursuant to
Article VII, the "Agent") and collateral agent (together with any successor
collateral agent appointed pursuant to Article VII, the "Collateral Agent"). In
consideration of the mutual covenants and agreements contained herein, the
Borrowers, the Banks, the Issuing Banks, the Agent and the Collateral Agent
hereby agree as set forth herein.

                             PRELIMINARY STATEMENTS

      WHEREAS, each of the Borrowers is a borrower under that certain Credit
Agreement dated as of June 6, 2003 (as amended, restated, supplemented or
otherwise modified, the "Existing Agreement") with the banks party thereto,
CUSA, as administrative agent and collateral agent, BofA, as syndication agent,
Citibank and BofA, as issuing banks, and others;

      WHEREAS, the Borrowers have requested that the Banks lend to the Borrowers
and the Issuing Banks issue Letters of Credit at the request of the Borrowers to
provide for the working capital needs and general corporate purposes of the
Borrowers; and

      WHEREAS, the Issuing Banks and Banks are willing to lend such amounts and
to issue such Letters of Credit on the terms and subject to the conditions
hereinafter set forth (including Article III);

      NOW, THEREFORE, in consideration of the premises and of the mutual
covenants and agreements contained herein, the parties hereto hereby agree as
follows:

                                   ARTICLE I

                        DEFINITIONS AND ACCOUNTING TERMS

      SECTION 1.1. Certain Defined Terms. As used in this Agreement, the
following terms shall have the following meanings (such meanings to be equally
applicable to both the singular and plural forms of the terms defined):

      "Acceptable Security Interest" in any property means a Lien granted
pursuant to a Credit Document (a) which exists in favor of the Collateral Agent
for the benefit of itself, the Agent, the Banks and the Issuing Banks, (b) which
is superior to all other Liens, except Collateral Permitted Liens, (c) which
secures the Obligations, and (d) which is perfected and is enforceable by the
Collateral Agent for the benefit of itself, the Agent, the Banks and the Issuing
Banks, against all other Persons in preference to any rights of any such other
Persons therein (other than beneficiaries of Collateral Permitted Liens);
provided that such Lien may be subject to the Agreed Exceptions and Collateral
Permitted Liens.

      "Additional Mortgage" has the meaning specified in Section 5.1(g)(ii).

<PAGE>

      "Agent" means CUSA, in its capacity as administrative agent pursuant to
Article VII hereof and any successor Agent pursuant to Section 7.6.

      "Agreed Exceptions" means exceptions to title to be set forth in the Real
Property Mortgages that are customary in similar mortgages, do not materially
detract from the value of the assets covered thereby, do not secure Debt and
arise in the ordinary course of business or that are otherwise agreed to in
writing by the Collateral Agent.

      "Agreement" has the meaning specified in the first paragraph of this
Agreement.

      "Apco Argentina" means Apco Argentina, Inc., a Cayman Islands corporation.

      "Applicable Commitment Fee Rate" means the rate per annum set forth on
Schedule IV opposite the heading "Applicable Commitment Fee Rate" for the
relevant Rating Category applicable to TWC from time to time. The Applicable
Commitment Fee Rate shall change when and as the relevant Rating Category
applicable to TWC changes.

      "Applicable Lending Office" means, with respect to each Bank, such Bank's
Domestic Lending Office in the case of a Base Rate Advance and such Bank's
Eurodollar Lending Office in the case of a Eurodollar Rate Advance.

      "Applicable Margin" means, for any Borrower, as to any Eurodollar Rate
Advance or Base Rate Advance to such Borrower, the rate per annum set forth in
the table on Schedule IV opposite the heading "Applicable Margin" (for the
relevant Type of Advance) for the relevant Rating Category applicable to such
Borrower. The Applicable Margin determined pursuant to this definition for any
Eurodollar Rate Advance or Base Rate Advance, as applicable, for any Borrower
shall change when and as the relevant Rating Category applicable to such
Borrower changes.

      "Asset" or "property" (in each case, whether or not capitalized) means any
right, title or interest in any kind of property or asset, whether real,
personal or mixed, and whether tangible or intangible.

      "Attributable Obligation" of any Person means, with respect to any Sale
and Leaseback Transaction of such Person as of any particular time, the present
value at such time discounted at the rate of interest implicit in the terms of
the lease of the obligations of the lessee under such lease for net rental
payments during the remaining term of the lease (including any period for which
such lease has been extended or may, at the option of such Person only, be
extended).

      "Authorized Financial Officer" of any Person means the Chief Financial
Officer, Chief Accounting Officer, and the Treasurer of such Person.

      "Authorized Officer" of any Person means the President, Chief Executive
Officer, Chief Financial Officer, the General Counsel, any Vice President, the
Secretary, the Assistant Secretary, the Treasurer, Assistant Treasurer, or the
Controller of such Person or any other officer designated as an "Authorized
Officer" by the Board of Directors (or equivalent governing body) of such
Person.

      "Available Amount" of any Letter of Credit means, at any time, the maximum
amount available to be drawn under such Letter of Credit at such time (after
giving effect to any step up provision or other mechanism for increase, if any,
and assuming compliance at such time with all conditions to drawing).

      "Banks" means the lenders listed on the signature pages hereof and each
other Person that becomes a Bank pursuant to Section 2.19(d) or Section 8.5(a).

                                      -2-
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      "Base Rate" means a fluctuating interest rate per annum in effect from
time to time, which rate per annum shall at all times be equal to the higher of:

      (a) the rate of interest announced publicly by Citibank in New York, New
York, from time to time, as Citibank's base rate; and

      (b) 1/2 of 1% per annum above the Federal Funds Rate.

      "Base Rate Advance" means a Revolving Credit Advance that bears interest
as provided in Section 2.13(a)(i) (or, if Section 2.13(b) applies, that bears
interest at 2% above the rate provided in Section 2.13(a)(i)).

      "B of A" has the meaning specified in the recitals hereto.

      "Borrowers" has the meaning specified in the recitals hereto.

      "Business Day" means a day of the year on which banks are not required or
authorized to close in New York City.

      "Business Entity" means a partnership, limited partnership, limited
liability partnership, corporation (including a business trust), limited
liability company, unlimited liability company, joint stock company, trust,
unincorporated association, joint venture or other entity.

      "Capital Lease" means a lease that in accordance with GAAP must be
reflected on a Person's balance sheet as an asset and corresponding liability.

      "Change of Control Event" means the occurrence of any of the following:
(i) any Person (other than a trustee or other fiduciary holding securities under
an employee benefit plan of TWC or of any Subsidiary of TWC) or two or more
Persons acting in concert (other than any group of employees of TWC or of any of
its Subsidiaries) shall have acquired beneficial ownership (within the meaning
of Rule 13d-3 of the Securities and Exchange Commission under the Securities
Exchange Act of 1934), directly or indirectly, of securities of TWC (or other
securities convertible into such securities) representing 50% or more of the
combined voting power of all securities of TWC entitled to vote in the election
of directors, other than securities having such power only by reason of the
happening of a contingency, or (ii) the first day on which a majority of the
members of the board of directors of TWC are not Continuing Directors.

      "Citibank" has the meaning specified in the recitals hereto.

      "Code" means, as appropriate, the Internal Revenue Code of 1986, as
amended, or any successor federal tax code, and any reference to any statutory
provision shall be deemed to be a reference to any successor provision or
provisions.

      "Co-Documentation Agents" means JPMorgan Chase Bank, The Bank of Nova
Scotia and The Royal Bank of Scotland plc.

      "Collateral" means all personal and real property of each of the Western
Midstream Subsidiaries, whether now owned or hereafter acquired, all Equity
Interests of each of the Western Midstream Subsidiaries, whether now owned or
hereafter acquired, and all other property subject to a Lien granted to the
Collateral Agent in accordance with the terms of any Security Document, whether
now owned or

                                      -3-
<PAGE>

hereafter acquired; provided that neither the LC Cash Collateral Accounts nor
the Excluded Assets shall constitute "Collateral".

      "Collateral Agent" means CUSA in its capacity as Collateral Agent pursuant
to Article VII and any successor in such capacity pursuant to Section 7.6.

      "Collateral Permitted Liens" means Liens specifically described on
Schedule IX-1.

      "Collateral Release Date" has the meaning specified in Section 8.15.

      "Commitment" means a Revolving Credit Commitment or a Letter of Credit
Commitment.

      "Commitment Fee" has the meaning specified in Section 2.11(c).

      "Consolidated" refers to the consolidation of the accounts of any Person
and its Consolidated Subsidiaries in accordance with GAAP.

      "Consolidated Net Worth" of any Person means the Net Worth of such Person
and its Consolidated Subsidiaries on a Consolidated basis plus the Designated
Minority Interests, if applicable, to the extent not otherwise included. As used
in this definition, "Designated Minority Interests" means, as of any date of
determination, the total value, determined in accordance with GAAP, of the
minority interests in Subsidiaries of TWC to the extent such minority interests
are owned by Persons other than TWC and its Consolidated Subsidiaries; provided
that any minority interest for which TWC or any of its Subsidiaries has an
obligation to repurchase shall not be included in "Designated Minority
Interests".

      "Consolidated Subsidiaries" of any Person means all other Persons the
financial statements of which are consolidated with those of such Person in
accordance with GAAP.

      "Continuing Directors" means, as of any date of determination, any member
of the board of directors of TWC who:

      (1) was a member of such board of directors on the date hereof; or

      (2) was nominated for election or elected to such board of directors with
the approval of a majority of the Continuing Directors who were members of such
board of directors at the time of such nomination or election.

      "Convert", "Conversion" and "Converted" each refers to a conversion of
Revolving Credit Advances of one Type into Revolving Credit Advances of the
other Type pursuant to Sections 2.14, 2.15 or 2.16.

      "Credit Documents" means (i) this Agreement, the Guaranties, the Security
Documents, the Letter of Credit Documents, each Letter of Credit, each Note,
each Notice of Letter of Credit and each Notice of Revolving Credit Borrowing at
any time executed or delivered to the Agent, the Collateral Agent, any Issuing
Bank or any Bank in connection herewith, and (ii) for purposes of the definition
herein of "Acceptable Security Interest", Sections 2.8 and 2.18, Articles VII
and VIII, any Transfer Agreement, any Revolving Credit Commitment Increase
Agreement or any Letter of Credit Commitment Increase Agreement only, any
security agreement or pledge delivered in order to comply with Section 5.2(m).

      "Credit Party" means each Borrower and, until the Collateral Release Date,
WFSGI and each Guarantor.

                                      -4-
<PAGE>

      "CUSA" has the meaning specified in the recitals hereto.

      "Debt" means, in the case of any Person, the principal or equivalent
amount (without duplication) of (i) indebtedness of such Person for borrowed
money, (ii) obligations of such Person evidenced by bonds, debentures, notes or
similar instruments (other than surety, performance and guaranty bonds), (iii)
obligations of such Person to pay the deferred purchase price of property or
services (other than trade payables), (iv) obligations of such Person as lessee
under Capital Leases, (v) obligations of such Person under any Financing
Transaction, (vi) any Attributable Obligations of such Person with respect to
any Sale and Leaseback Transaction entered into on or after the Effective Date,
(vii) obligations of such Person under guaranties in respect of, and obligations
(contingent or otherwise) to purchase or otherwise acquire, or otherwise to
assure a creditor against loss in respect of, indebtedness or obligations of
others of the kinds referred to in clauses (i) through (vi) of this definition;
provided that Debt shall not include (1) Non-Recourse Debt, (2) Performance
Guaranties, (3) monetary obligations or guaranties of monetary obligations of
Persons as lessee under leases (other than, to the extent provided hereinabove,
Attributable Obligations) that are, in accordance with GAAP, recorded as
operating leases, (4) Reclassified Tolling Arrangements, (5) any obligations of
such Person under volumetric production payment arrangements, (6) Financing
Transactions in existence on the Effective Date and listed on Schedule XIII, and
(7) guarantees by such Person of obligations of others which are not obligations
described in clauses (i) through (vi) of this definition, and provided further
that where any such indebtedness or obligation of such Person is made jointly,
or jointly and severally, with any third party or parties other than any
Subsidiary of such Person, the amount thereof for the purpose of this definition
only shall be the pro rata portion thereof payable by such Person, so long as
such third party or parties have not defaulted on its or their joint and several
portions thereof and can reasonably be expected to perform its or their
obligations thereunder. For the avoidance of doubt, "Debt" of a Person in
respect of letters of credit shall include, without duplication, only the
principal amount of the obligations of such Person in respect of such letters of
credit that have been drawn upon by the beneficiaries to the extent of the
amount drawn, and shall include no other obligations in respect of such letters
of credit.

      "Default" means any event or condition that, upon the giving of notice or
passage of time or both, if required by Section 6.1, would constitute an Event
of Default.

      "Designating Bank" has the meaning specified in Section 8.5(g).

      "Dollars" and "$" means lawful money of the United States of America.

      "Domestic Lending Office" means, with respect to any Bank, the office of
such Bank specified as its "Domestic Lending Office" opposite its name on
Schedule I hereto or in the Transfer Agreement or Revolving Credit Commitment
Increase Agreement pursuant to which it became a Bank, or such other office of
such Bank as such Bank may from time to time specify to the Borrowers and the
Agent.

      "EBITDA" means, for any Measurement Period, the sum of (i) the
Consolidated net income (or loss) of TWC and its Consolidated Subsidiaries for
such Measurement Period determined in accordance with GAAP plus (ii) to the
extent included in the determination of such net income (or loss), the
Consolidated charges for such period for EBITDA Interest Expense, depreciation,
depletion and amortization, plus (iii) to the extent included in the
determination of such net income (or loss), the amount of any provision for
income taxes and franchise taxes, plus (iv) to the extent included in the
determination of such net income (or loss), the amount of any other non-cash
charges, including asset impairments, write-downs or write-offs, plus (v) to the
extent included in the determination of such net income (or loss), the amount of
cash payments referred to in the letter dated the date hereof to the Agent and
the Banks not exceeding, in the aggregate, the amount set forth in such letter,
plus (vi) to the extent included in the determination of such net income (or
loss), the amount of charges, fees or expenses associated with

                                      -5-
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any repurchase or repayment of debt, including any premium and acceleration of
fees or discounts and other expenses, minus (vii) to the extent included in the
determination of such net income (or loss), the amount of any provision benefit
or credit from income taxes or franchise taxes; provided that in determining
such Consolidated net income and such Consolidated charges, there shall be
excluded therefrom (to the extent otherwise included therein) (a) pre-tax gains
or losses on the sale, transfer or other disposition of any property by TWC or
its Consolidated Subsidiaries (other than sales, transfers and other
dispositions in the ordinary course of business), (b) all extraordinary gains
and extraordinary losses, prior to applicable income taxes and franchise taxes,
(c) any item constituting the cumulative effect of a change in accounting
principles, prior to applicable income taxes and franchise taxes, (d) the net
income (or loss) of, charges for interest, depreciation, depletion and
amortization of, and other non-cash charges of, any Non-Recourse Subsidiary or
any asset securing Non-Recourse Debt, except and then only to the extent of the
amount thereof that TWC actually receives as cash dividends during such
Measurement Period and has no obligation to return at any time, and (e) any
income (or loss), charges for interest, depreciation, depletion and
amortization, and other non-cash charges, associated with matters accounted for
as discontinued operations as of December 31, 2003.

      "EBITDA Interest Expense" means, for any Measurement Period, the gross
interest expense (determined in accordance with GAAP) of TWC and its
Consolidated Subsidiaries accrued for such period, including that attributable
to the capitalized amount of obligations owing under Capital Leases, all debt
discount and debt issuance costs and commissions amortized in such period and
all commissions, discounts and other fees and charges owed with respect to
letters of credit and bankers' acceptance financing and other fees and charges
associated with debt of TWC and its Consolidated Subsidiaries, but excluding
such interest expense, debt discount, commission, discounts and other fees and
charges to the extent attributable to Reclassified Tolling Arrangements or
Non-Recourse Debt.

      "Echo Springs Processing Plant" means the assets described on Schedule X.

      "EDGAR" means the "Electronic Data Gathering, Analysis and Retrieval"
system (or any successor system thereof), a database maintained by the
Securities and Exchange Commission containing electronic filings of issuers of
certain securities.

      "Effective Date" has the meaning specified in Section 3.1.

      "El Furrial" means WilPro Energy Services (El Furrial) Limited, a Cayman
Islands corporation.

      "Eligible Assignee" means (i) any Bank, (ii) any affiliate of any Bank
that is consented to by the Issuing Banks (which consent will not be
unreasonably withheld), and (iii) any other Person not covered by clause (i) or
(ii) of this definition that is consented to by TWC, the Agent and the Issuing
Banks (which consents shall not be unreasonably withheld); provided that if any
Event of Default has occurred and is continuing, no consent of TWC shall be
required; provided further that neither the Borrowers nor any affiliate of the
Borrowers shall be an Eligible Assignee.

      "Environment" shall have the meaning set forth in 42 U.S.C. Section
9601(8) or any successor statute and "Environmental" shall mean pertaining or
relating to the Environment.

      "Environmental Law" shall mean any United States local, state or federal,
or any foreign, law, statute, regulation, order, consent decree, written
agreement with a Governmental Authority or Governmental Requirement arising from
or in connection with or relating to the protection or regulation of the
Environment including those laws, statutes, regulations, orders, decrees,
written agreements with a Governmental Authority and other Governmental
Requirements relating to the disposal, cleanup,

                                      -6-
<PAGE>

production, storing, refining, handling, transferring, processing or
transporting of Hazardous Waste, Hazardous Substances or any pollutant or
contaminant.

      "Environmental Permits" mean all material permits, licenses,
registrations, exemptions and authorizations required under any Environmental
Law.

      "Equity Interests" means any capital stock, partnership, joint venture,
member or limited liability or unlimited liability company interest, beneficial
interest in a trust or similar entity or other equity interest or investment of
whatever nature or any warrant, option or other right to acquire any Equity
Interest.

      "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended from time to time, and the regulations promulgated and rulings issued
thereunder from time to time.

      "ERISA Affiliate" of any Credit Party means any trade or business (whether
or not incorporated) which is a member of a group of which such Credit Party is
a member and which is under common control or is treated as a single employer
with such Credit Party within the meaning of Section 414 of the Code and the
regulations promulgated thereunder.

      "Eurocurrency Liabilities" has the meaning assigned to that term in
Regulation D of the Federal Reserve Board, as in effect from time to time.

      "Eurodollar Lending Office" means, with respect to any Bank, the office of
such Bank specified as its "Eurodollar Lending Office" opposite its name on
Schedule I hereto or in the Transfer Agreement or Revolving Credit Commitment
Increase Agreement pursuant to which it became a Bank (or, if no such office is
specified, its Domestic Lending Office), or such other office of such Bank as
such Bank may from time to time specify to the Borrowers and the Agent.

      "Eurodollar Rate" means, for each Eurodollar Rate Advance comprising part
of the same Revolving Credit Borrowing for any Interest Period therefor, the
rate per annum (rounded upwards, if necessary, to the nearest 1/100 of 1%)
appearing on Dow Jones Markets Page 3750 (or any successor page) as the London
interbank offered rate for deposits in Dollars at approximately 11:00 a.m.
(London time) two Business Days prior to the first day of such Interest Period
for a term comparable to such Interest Period. If for any reason such rate is
not available, the term "Eurodollar Rate" shall mean, for each Eurodollar Rate
Advance comprising part of the same Revolving Credit Borrowing for any Interest
Period therefor, the rate per annum (rounded upwards, if necessary, to the
nearest 1/100 of 1%) appearing on Reuters Screen LIBO Page as the London
interbank offered rate for deposits in Dollars at approximately 11:00 a.m.
(London time) two Business Days prior to the first day of such Interest Period
for a term comparable to such Interest Period; provided that if more than one
rate is specified on Reuters Screen LIBO Page, the applicable rate shall be the
arithmetic mean of all such rates (rounded upwards, if necessary, to the nearest
1/100 of 1%).

      "Eurodollar Rate Advance" means a Revolving Credit Advance that bears
interest as provided in Section 2.13(a)(ii) (or, if Section 2.13(b) applies,
that bears interest at 2% above the rate provided in Section 2.13(a)(ii)).

      "Eurodollar Rate Reserve Percentage" of any Bank for any Interest Period
for any Eurodollar Rate Advance means the reserve percentage applicable during
such Interest Period (or if more than one such percentage shall be so
applicable, the daily average of such percentages for those days in such
Interest Period during which any such percentage shall be so applicable) under
regulations issued from time to time by the Federal Reserve Board (or any
successor) for determining the maximum reserve

                                      -7-
<PAGE>

requirement (including any emergency, supplemental or other marginal reserve
requirement) for such Bank with respect to liabilities or assets consisting of
or including Eurocurrency Liabilities having a term equal to such Interest
Period.

      "Events of Default" has the meaning specified in Section 6.1. For purposes
of clause (i) of the definition herein of "Interest Period", Section 2.14,
Section 6.1 and Section 6.2, an Event of Default exists as to a particular
Borrower if such Event of Default exists wholly or in part as a result of any
event, condition, action, inaction, representation or other matter of, by or
otherwise directly or indirectly pertaining to such Borrower or any Subsidiary
of such Borrower. Without limiting the foregoing and for purposes of further
clarification, it is agreed that inasmuch as each of TGPL and NWP is a
Subsidiary of TWC, any Event of Default that exists as to either of TGPL or NWP
also exists as to TWC.

      "Excess Proceeds" means all cash proceeds (net of any tax payable)
received prior to the Collateral Release Date by TWC or any Subsidiary of TWC on
account of or as a result of any claim under any title insurance policy
pertaining to any Collateral or any damage, destruction or taking of any
Collateral (other than (i) amounts received under any business interruption
insurance, (ii) proceeds aggregating less than $100,000,000 during the term of
this Agreement and (iii) proceeds received as a result of any damage,
destruction or taking of Collateral that are either (a) reinvested within nine
months in new or existing Collateral or (b) committed to be so reinvested within
nine months pursuant to a formal plan (a copy of which shall be sent by TWC to
all Banks) so long as TWC or its Subsidiaries diligently pursue such plan;
provided that the aggregate amount so committed pursuant to this clause (b) but
not yet spent shall not exceed $250,000,000 at any time).

      "Excess Proceeds Payment Date" means, as to any Excess Proceeds, (i) the
first Business Day after the date that is nine months following receipt of such
Excess Proceeds if such Excess Proceeds have not been committed by such date to
be reinvested as contemplated in clause (b) of the definition herein of Excess
Proceeds or if the formal plan referred to in such clause (b) has not been
delivered to the Banks by such date and (ii) any date on which TWC or its
Subsidiaries, as the case may be, fail to diligently pursue such plan in all
material respects.

      "Excluded Assets" means (i) the property described on Schedule V, and (ii)
any information technology equipment, hardware or software.

      "Existing Agreement" has the meaning specified in the preliminary
statements hereto.

      "Existing Credit Documentation" means the Existing Agreement and the
"Security Agreement" (as defined in the Existing Agreement).

      "Existing Letters of Credit" means the letters of credit listed on
Schedule VII.

      "Existing Tolling Arrangements" means those tolling arrangements listed on
Schedule VIII.

      "Federal Funds Rate" means, for any day, a fluctuating interest rate per
annum equal for such day to the weighted average of the rates on overnight
federal funds transactions with members of the Federal Reserve System arranged
by federal funds brokers, as published for such day (or, if such day is not a
Business Day, for the next preceding Business Day) by the Federal Reserve Bank
of New York, or, if such rate is not so published for any day which is a
Business Day, the average of the quotations for such day on such transactions
received by the Agent from three federal funds brokers of recognized standing
selected by it.

                                      -8-
<PAGE>

      "Federal Reserve Board" means the Board of Governors of the Federal
Reserve System, or any federal agency or authority of the United States from
time to time succeeding to its function.

      "Financing Transaction" means, with respect to any Person (i) any prepaid
forward sale of oil, gas or minerals by such Person (other than gas balancing
arrangements in the ordinary course of business), that is intended primarily as
a borrowing of funds, excluding volumetric production payments and (ii) any
interest rate, currency, commodity or other swap, collar, cap, option or other
derivative that is intended primarily as a borrowing of funds (excluding
interest rate, currency, commodity or other swaps, collars, caps, options or
other derivatives to hedge against risks in the ordinary course of business),
with the amount of the obligations of such Person thereunder being the net
obligations of such Person thereunder.

      "Fiscal Quarter" means any quarter of a Fiscal Year.

      "Fiscal Year" means any period of twelve consecutive calendar months
ending on December 31.

      "Fronting Fee" shall have the meaning specified in Section 2.11(b)(i).

      "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as have been approved by a significant segment of the accounting
profession, all as in effect from time to time.

      "General Permitted Liens" means Liens specifically described on Schedule
IX-2.

      "Governmental Authority" means the government of the United States, any
other nation or any political subdivision thereof, whether state or local, and
any agency, authority, instrumentality, regulatory body, court, central bank or
other Person exercising executive, legislative, judicial, taxing, regulatory or
administrative powers or functions of or pertaining to government.

      "Governmental Requirements" means all judgments, orders, writs,
injunctions, decrees, awards, laws, ordinances, statutes, regulations, rules,
franchises, permits, certificates, licenses, authorizations and the like and any
other requirements of any government or any commission, board, court, agency,
instrumentality or political subdivision thereof.

      "Guaranties" means the Pipeline Holdco Guaranty, the Western Midstream
Guaranty and each guaranty delivered by a Western Midstream Subsidiary pursuant
to Section 5.1(g).

      "Guarantors" means Pipeline Holdco, WFSC, WGPC, WGPWC and any Western
Midstream Subsidiary that delivers a guaranty pursuant to Section 5.1(g).

      "Hazardous Substance" shall have the meaning set forth in 42 U.S.C.
Section 9601(14) and shall also include each other substance considered to be a
hazardous substance under any Environmental Law.

      "Hazardous Waste" shall have the meaning set forth in 42 U.S.C. Section
6903(5) and shall also include each other substance considered to be a hazardous
waste under any Environmental Law (including 40 C.F.R. Section 261.3).

      "Hydrocarbons" (whether or not capitalized) means oil, gas, casinghead
gas, condensate, distillate, and liquid hydrocarbons.

                                      -9-
<PAGE>

      "Indemnified Parties" has the meaning assigned to such term in Section
8.4(b).

      "Information Memorandum" means the Confidential Information Memorandum
dated March, 2004 relating to the Borrowers and the transactions contemplated
hereby.

      "Initial Mortgages" has the meaning specified in Section 3.1(j)(i).

      "Insufficiency" means, with respect to any Plan, the amount, if any, by
which the present value of the vested benefits under such Plan exceeds the fair
market value of the assets of such Plan allocable to such benefits.

      "Interest Expense" means, for any Measurement Period, the gross interest
expense (determined in accordance with GAAP) of TWC and its Consolidated
Subsidiaries accrued for such period of TWC and its Consolidated Subsidiaries,
but excluding, to the extent included in the determination of interest expense
for such period, (1) interest expense, debt discount, commission, discounts and
other fees and charges and interest income to the extent attributable to
Reclassified Tolling Arrangements or Non-Recourse Debt, (2) any charges,
expenses or fees associated with any repurchase or repayment of debt, and (3)
any noncash amortization of debt discounts, commissions, discounts, fees and
charges and any interest expense attributable to the capitalized amount of
obligations owing under Capital Leases.

      "Interest Period" means, for each Eurodollar Rate Advance comprising part
of the same Revolving Credit Borrowing, the period commencing on the date of
such Eurodollar Rate Advance or the date of the Conversion of any Base Rate
Advance into such Eurodollar Rate Advance and ending on the last day of the
period selected by a Borrower pursuant to the provisions below and, thereafter,
with respect to Eurodollar Rate Advances, each subsequent period commencing on
the last day of the immediately preceding Interest Period and ending on the last
day of the period selected by a Borrower pursuant to the provisions below. The
duration of each such Interest Period shall be one, two, three or six months, as
a Borrower may, upon notice received by the Agent not later than 11:00 A.M. (New
York City time) on the third Business Day prior to the first day of such
Interest Period, select; provided, however, that:

                  (i)   a Borrower may not select any Interest Period that ends
      after the Termination Date, and no Borrower may select any Interest Period
      if any Event of Default exists as to such Borrower;

                  (ii)  Interest Periods commencing on the same date for
      Eurodollar Rate Advances comprising part of the same Revolving Credit
      Borrowing shall be of the same duration;

                  (iii) whenever the last day of any Interest Period would
      otherwise occur on a day other than a Business Day, the last day of such
      Interest Period shall be extended to occur on the next succeeding Business
      Day; provided that, if such extension would cause the last day of such
      Interest Period to occur in the next following calendar month, the last
      day of such Interest Period shall occur on the next preceding Business
      Day; and

                  (iv)  whenever the first day of any Interest Period occurs on
      a day of an initial calendar month for which there is no numerically
      corresponding day in the calendar month that succeeds such initial
      calendar month by the number of months equal to the number of months in
      such Interest Period, such Interest Period shall end on the last Business
      Day of such succeeding calendar month.

      "International Debt" means the Debt of any International Subsidiary.

                                      -10-
<PAGE>

      "International Subsidiary" means each of El Furrial, Apco Argentina, PIGAP
II and any Subsidiary of any of them; provided that no Person shall be an
International Subsidiary if it is a Credit Party or owns, directly or
indirectly, any Equity Interest in any Credit Party.

      "Issuing Banks" means each of the two Issuing Banks named in the recitals
hereto and each New Letter of Credit Issuing Bank.

      "Joint Lead Arrangers" means Citigroup Global Markets Inc. and Banc of
America Securities LLC, as joint lead arrangers and joint book runners.

      "LC Cash Collateral Accounts" has the meaning specified in Section 6.2.

      "LC Participation Percentage" of any Bank means, at any time, the
percentage set opposite such Bank's name on Schedule III or as reflected for
such Bank in the relevant Transfer Agreement or Revolving Credit Commitment
Increase Agreement to which it is a party, as such percentage may be terminated,
reduced or increased pursuant to Section 2.19 or Section 8.5(a).

      "Letter of Credit Commitment" of any Issuing Bank means, at any time, the
amount set opposite such Issuing Bank's name on Schedule III under the heading
"Letter of Credit Commitments" or as reflected for such Issuing Bank in the
relevant Letter of Credit Commitment Increase Agreement to which it is a party,
as such amount may be terminated, reduced or increased pursuant to Section 2.4,
Section 2.19 or Section 6.1.

      "Letter of Credit Commitment Increase Agreement" means an agreement
substantially in the form of Exhibit L-3 or L-4 executed pursuant to Section
2.19 by TWC, the Agent and either a New Letter of Credit Issuing Bank or an
Issuing Bank that has agreed to increase its Letter of Credit Commitment.

      "Letter of Credit Documents" means, with respect to any Letter of Credit,
collectively, any application therefor and any other agreements, instruments,
guarantees or other documents (whether general in application or applicable only
to such Letter of Credit) governing or providing for (i) the rights and
obligations of the parties concerned or at risk with respect to such Letter of
Credit or (ii) any collateral security for any of such obligations, each as the
same may be modified and supplemented and in effect from time to time.

      "Letter of Credit Facility Increase" has the meaning specified in Section
2.19(e).

      "Letter of Credit Facility Increase Effective Date" has the meaning
specified in Section 2.19(f).

      "Letter of Credit Facility Increase Notice" has the meaning specified in
Section 2.19(f).

      "Letter of Credit Fee" has the meaning specified in Section 2.11(b)(ii).

      "Letter of Credit Interest" means, for each Bank, (i) such Bank's
participation interest in Letters of Credit (and, in the case of an Issuing
Bank, such Issuing Bank's retained interest in Letters of Credit issued by it),
and (ii) such Bank's rights and interests in Reimbursement Obligations and fees,
interest and other amounts payable in connection with Letters of Credit and
Reimbursement Obligations.

      "Letter of Credit Liability" means at any time and in respect of any
Letter of Credit, the sum (without duplication) of (a) the Available Amount of
such Letter of Credit at such time (after giving effect to any step up provision
or other mechanism for increase, if any, and assuming that all conditions to
drawing have been satisfied) plus (b) the aggregate unpaid amount of all
drawings under such Letter of

                                      -11-
<PAGE>

Credit that are unpaid at such time. For purposes of this Agreement, a Bank
shall be deemed to hold a Letter of Credit Liability in an amount equal to its
LC Participation Percentage times the Letter of Credit Liability in respect of
the related Letter of Credit.

      "Letters of Credit" means any letter of credit issued or deemed issued
pursuant to this Agreement (including each Existing Letter of Credit), as
amended, extended or otherwise modified from time to time.

      "Lien" means any mortgage, lien, pledge, charge, deed of trust, security
interest, encumbrance or other analogous type of preferential arrangement,
whether arising by contract, operation of law or otherwise (including the
interest of a vendor or lessor under any conditional sale agreement, Capital
Lease or other title retention agreement).

      "Majority Banks" means, at any time, Banks owed or holding more than 50%
of the sum of (i) the aggregate unpaid principal amount of Revolving Credit
Advances outstanding at such time, or if no such principal amount is then
outstanding, the aggregate Revolving Credit Commitments and (ii) the aggregate
Available Amount of all Letters of Credit outstanding at such time, or if no
such Available Amount of Letters of Credit is then outstanding, then the
aggregate unpaid principal amount of any outstanding Letter of Credit Interests.

      "Material Adverse Effect" means, in respect of any Borrower, a material
adverse effect on (a) the business, assets, operations or condition, financial
or otherwise, of such Borrower and its Subsidiaries taken as a whole, or (b) the
ability of such Borrower and its Subsidiaries, taken as a whole, to perform
their obligations under any Credit Document taken as a whole.

      "Material Subsidiary" of any Borrower means (i) each Subsidiary of such
Borrower that itself (on an unconsolidated, stand alone basis) owns in excess of
7.5% (or, on and after the Trading Book Termination Date, 10%) of the book value
of the Consolidated assets of such Borrower and its Consolidated Subsidiaries,
and (ii) each Subsidiary of such Borrower that is a Credit Party; provided that
Non-Recourse Subsidiaries and International Subsidiaries are not Material
Subsidiaries for any purpose of this Agreement.

      "Measurement Period" means (i) the period consisting of the two
consecutive Fiscal Quarters of TWC ending September 30, 2004, (ii) the period
consisting of the three consecutive Fiscal Quarters of TWC ending December 31,
2004, and (iii) each period ending after December 31, 2004 consisting of four
consecutive Fiscal Quarters of TWC.

      "Midstream Asset MLP" means one or more master limited partnerships
included in the Consolidated financial statements of TWC to which TWC has
transferred or shall transfer certain assets relating to its midstream business
(other than the Western Midstream Business) as well as certain marine and inland
terminals and related pipeline systems.

      "Moody's" means Moody's Investor Service, Inc. or its successor.

      "Multiemployer Plan" means any multiemployer plan, as defined in Section
4001(a)(3) of ERISA, which is maintained by (or to which there is an obligation
to contribute of) any Credit Party or an ERISA Affiliate of any Credit Party.

      "Multiple Employer Plan" means an employee benefit plan as defined in
Section 3(2) of ERISA, other than a Multiemployer plan, subject to Title IV of
ERISA to which any Borrower or any ERISA Affiliate of any Borrower, and one or
more employers other than any Borrower or an ERISA Affiliate of any Borrower, is
making or accruing an obligation to make contributions or, in the event that any
such

                                      -12-
<PAGE>

plan has been terminated, to which any Borrower or any ERISA Affiliate of any
Borrower made or accrued an obligation to make contributions during any of the
five plan years preceding the date of termination of such plan.

      "Net Worth" of any Person means, as of any date of determination, the
excess of total assets of such Person (plus all non-cash losses resulting from
the write-down or disposition of assets of such Person after March 31, 2004)
over total liabilities of such Person, total assets and total liabilities each
to be determined in accordance with GAAP; provided that for purposes of
calculating Net Worth of TWC, (i) total liabilities shall not include any
obligations of Non-Recourse Subsidiaries in respect of Non-Recourse Debt, and
(ii) total assets shall not include any assets that secure any Non-Recourse Debt
or any assets of any Non-Recourse Subsidiary.

      "New Letter of Credit Issuing Bank" has the meaning specified in Section
2.19(e).

      "New Revolving Bank" has the meaning specified in Section 2.19(a).

      "Non-Pipeline TWC Group" means TWC and its Subsidiaries, excluding NWP,
TGPL and Pipeline Holdco.

      "Non-Recourse Debt" means any Debt incurred by any Non-Recourse Subsidiary
to finance the acquisition, improvement, installation, design, engineering,
construction, development, completion, maintenance or operation of, or otherwise
to pay costs and expenses relating to or provide financing for, a project listed
on Schedule VI or any new project commenced or acquired after May 2, 2004, which
Debt does not provide for recourse against a Credit Party or any Subsidiary of a
Credit Party (other than a Non-Recourse Subsidiary and such recourse as exists
under a Performance Guaranty) or any property or asset of any Credit Party or
any Subsidiary of a Credit Party (other than the Equity Interests in, or the
property or assets of, a Non-Recourse Subsidiary).

      "Non-Recourse Subsidiary" means (i) any non-material Subsidiary of any
Borrower whose principal purpose is to incur Non-Recourse Debt and/or construct,
lease, own or operate the assets financed thereby, or to become a direct or
indirect partner, member or other equity participant or owner in a Business
Entity created for such purpose, and substantially all the assets of which
Subsidiary and such Business Entity are limited to (x) those assets being
financed (or to be financed), or the operation of which is being financed (or to
be financed), in whole or in part by Non-Recourse Debt, or (y) Equity Interests
in, or Debt or other obligations of, one or more other such Subsidiaries or
Business Entities, or (z) Debt or other obligations of any Borrower or its
Subsidiaries or other Persons and (ii) any Subsidiary of a Non-Recourse
Subsidiary. For purposes of this definition, a "non-material Subsidiary" shall
mean any Consolidated Subsidiary of any Borrower that is not a Credit Party and
is not an owner, directly or indirectly, of any Equity Interest in any Credit
Party.

      "Note" means a promissory note of a Borrower payable to the order of any
Bank, in substantially the form of Exhibit I hereto (as such note may be
amended, endorsed or otherwise modified from time to time), delivered at the
request of such Bank pursuant to Section 2.10 or 8.5, together with any other
note accepted from time to time in substitution or replacement therefor.

      "Notice of Letter of Credit" has the meaning specified in Section 2.2(a).

      "Notice of Revolving Credit Borrowing" has the meaning specified in
Section 2.3(a).

      "NWP" has the meaning specified in the recitals hereto.

                                      -13-
<PAGE>

      "Obligations" means all Reimbursement Obligations, the principal of and
interest on each Revolving Credit Advance and all other Debt, advances,
interest, debts, liabilities, obligations, indemnities, fees, expenses, charges
and other amounts owing by any Credit Party to any Bank, the Agent, the
Collateral Agent or any Issuing Bank under any Credit Documents or to any other
Person required to be indemnified under any Credit Document, of any kind or
nature, present or future, arising under this Agreement or any other Credit
Document, whether or not for the payment of money, whether arising by reason of
an extension of credit, loan, guaranty, indemnification or in any other manner,
whether direct or indirect (including those acquired by assignment), absolute or
contingent, due or to become due, now existing or hereafter arising and however
acquired.

      "PBGC" means the Pension Benefit Guaranty Corporation.

      "Performance Guaranty" means any guaranty issued in connection with any
Non-Recourse Debt or International Debt that (i) if secured, is secured only by
assets of, or Equity Interests in, a Non-Recourse Subsidiary or International
Subsidiary, as applicable, and (ii) guarantees to the provider of such
Non-Recourse Debt or International Debt or any other Person the (a) performance
of the improvement, installation, design, engineering, construction,
acquisition, development, completion, maintenance or operation of, or otherwise
affects any such act in respect of, all or any portion of the project that is
financed by such Non-Recourse Debt or International Debt, (b) completion of the
minimum agreed equity contributions to the relevant Non-Recourse Subsidiary or
International Subsidiary, as applicable, or (c) performance by a Non-Recourse
Subsidiary or International Subsidiary, as applicable, of obligations to Persons
other than the provider of such Non-Recourse Debt or International Debt.

      "Permitted Dispositions" means (i) the sale or other transfer of WGPC's
and WGPWC's respective interests, or any portion thereof, in the Wamsutter
Gathering System and/or the Echo Springs Processing Plant to a joint venture in
exchange for an interest in such joint venture, if either the Collateral Release
Date has occurred or an Acceptable Security Interest continues in the Collateral
sold or transferred to such joint venture, and (ii) the sale or transfer of all
or a portion of any of the Southwest Wyoming gathering systems owned by the
Western Midstream Subsidiaries either in exchange for assets of like kind and
value in a form and manner which would qualify for a tax-deferred exchange of
assets under Section 1031 of the Internal Revenue Code, or any other similar
exchange transaction, provided that (a) the fair market value of the assets of
the Southwest Wyoming gathering systems so sold or transferred (as reasonably
estimated by TWC) does not exceed $48,000,000 and (b) an Acceptable Security
Interest in the assets acquired by any Western Midstream Subsidiary undertaking
such transaction is created in accordance with Section 5.1(l).

      "Person" means an individual, partnership, corporation, limited liability
company, business trust, joint stock company, trust, unincorporated association,
joint venture or other Business Entity, or a government or any political
subdivision or agency thereof.

      "PIGAP II" means WilPro Energy Services (PIGAP II) Limited, a Cayman
Islands corporation.

      "Pipeline Groups" means (i) NWP and its Subsidiaries, (ii) TGPL and its
Subsidiaries, and (iii) Pipeline Holdco and its Subsidiaries (other than NWP,
TGPL and their respective Subsidiaries).

      "Pipeline Holdco" means Williams Gas Pipeline Company, LLC, a Delaware
limited liability company.

      "Pipeline Holdco Guaranty" means the guaranty executed by Pipeline Holdco
in substantially the form of Exhibit E-1, as amended, supplemented or otherwise
modified from time to time.

                                      -14-
<PAGE>

      "Plan" means an employee pension benefit plan (other than a Multiemployer
Plan) as defined in Section 3(2) of ERISA currently maintained by, or in the
event such plan has terminated, to which contributions have been made or an
obligation to make such contributions has accrued during any of the five plan
years preceding the date of the termination of such plan by, any Credit Party or
any ERISA Affiliate of any Credit Party for employees of any Credit Party or any
such ERISA Affiliate and covered by Title IV of ERISA or subject to the minimum
funding standards under Section 412 of the Code.

      "Pledge" means the Pledge Agreement executed by WFSGI in substantially the
form of Exhibit F, as amended, supplemented or otherwise modified from time to
time.

      "Power Portfolio Disposition Transaction" means the sale, buyout,
liquidation or material restructuring, not in the ordinary course of business,
of a tolling or full requirements structured transaction in existence on the
date hereof, and associated hedging obligations; provided that in the good faith
belief of an executive officer of TWC, such sale, buyout, liquidation or
restructuring is consistent with the effort to reduce the risk profile and
overall financial commitment of TWC's power business.

      "Purchase Card Agreement" means that certain Purchase Card Agreement
between TWC and CUSA dated January 29, 2002, as amended, supplemented or
otherwise modified from time to time.

      "Rating Category" means, as to any Borrower, the relevant category
(designated as a "Level" followed by a Roman numeral) applicable to such
Borrower from time to time as set forth on Schedule IV, which is based on the
ratings (or lack thereof) of such Borrower's senior unsecured long-term debt by
S&P or Moody's. In the event there is a split between the ratings of any
Borrower's senior unsecured long-term debt by S&P and Moody's, "Rating Category"
shall be determined based on the higher rating of such Borrower's senior
unsecured long-term debt by S&P or Moody's, unless there is more than one
subgrade split between the two ratings, then the Level that is one below the
Level that would otherwise result from the higher of the two ratings shall
apply. For example, if S&P rates the senior unsecured long-term debt of a
Borrower BB+ and Moody's rates such debt B2, then Level III on Schedule IV shall
apply to such Borrower.

      "Real Property Mortgages" means the Initial Mortgages, each Additional
Mortgage and each mortgage or deed of trust delivered pursuant to Section
5.1(g)(iii).

      "Reclassified Tolling Arrangements" means those Existing Tolling
Arrangements that are reclassified in accordance with GAAP (whether as a result
of amendment, modification or otherwise) after December 31, 2003 as debt.

      "Register" has the meaning specified in Section 8.5(c).

      "Regulation U" means Regulation U of the Federal Reserve Board, as in
effect from time to time.

      "Reimbursement Obligations" means, at any time, in respect of any Borrower
the obligations of such Borrower then outstanding, or that may thereafter arise,
in respect of all Letters of Credit issued at the request of such Borrower then
outstanding to reimburse amounts paid by any Issuing Bank in respect of any
drawings under any such Letter of Credit.

      "Related Party" of any Person means any other Person of which more than
10% of the outstanding Equity Interests having ordinary voting power to elect a
majority of the board of directors of such other Person or others performing
similar functions (irrespective of whether or not at the time Equity Interests
of any other class or classes of such other Person shall or might have voting
power upon the occurrence of any contingency) is at the time directly or
indirectly owned by such first Person or which

                                      -15-
<PAGE>

owns at the time directly or indirectly more than 10% of the outstanding Equity
Interests having ordinary voting power to elect a majority of the board of
directors of such first Person or others performing similar functions
(irrespective of whether or not at the time Equity Interests of any other class
or classes of such first Person shall or might have voting power upon the
occurrence of any contingency); provided that (i) no Person that is part of the
Non-Pipeline TWC Group shall be considered to be a Related Party of any other
Person that is a part of the Non-Pipeline TWC Group and (ii) no Person that is a
part of a Pipeline Group shall be considered to be a Related Party of any other
Person that is a part of the same Pipeline Group.

      "Revolving Credit Advance" means an advance by a Bank to a Borrower as
part of a Revolving Credit Borrowing and refers to a Base Rate Advance or a
Eurodollar Rate Advance (each of which shall be a "Type" of Revolving Credit
Advance).

      "Revolving Credit Borrowing" means a borrowing consisting of simultaneous
Revolving Credit Advances of the same Type made by each of the Banks, pursuant
to Section 2.1(a).

      "Revolving Credit Commitment" means, with respect to any Bank for any
Borrower at any time, the amount set forth opposite such Bank's name for such
Borrower on Schedule III hereto under the caption "Revolving Credit Commitment"
for such Borrower or, if such Bank has entered into one or more Transfer
Agreements or Revolving Credit Commitment Increase Agreements, set forth for
such Bank and such Borrower in the Register maintained by the Agent pursuant to
Section 8.5(c) as such Lender's "Revolving Credit Commitment" for such Borrower,
as such amount may be terminated or reduced at or prior to such time pursuant to
Section 2.4 or Section 6.1.

      "Revolving Credit Commitment Increase Agreement" means an agreement
substantially in the form of Exhibit L-1 or L-2 executed pursuant to Section
2.19 by TWC, the Agent, the Issuing Banks and either a New Revolving Bank or a
Bank that has agreed to increase its Revolving Credit Commitment.

      "Revolving Credit Facility Increase" has the meaning specified in Section
2.19(a).

      "Revolving Credit Facility Increase Effective Date" has the meaning
specified in Section 2.19(b).

      "Revolving Credit Facility Increase Notice" has the meaning specified in
Section 2.19(b).

      "RMT" means Williams Production RMT Company, a Delaware corporation and
its Subsidiaries.

      "RMT Loan Agreement" means the Term Loan Agreement, dated as of May 30,
2003, by and among Williams Production Holdings LLC, Williams Production RMT
Company, Lehman Brothers Inc. and Banc of America Securities LLC, as joint lead
arrangers, Citicorp USA, Inc. and JPMorgan Chase Bank, as co-syndication agents,
Bank of America, N.A., as documentation agent, and Lehman Commercial Paper Inc.,
as administrative agent, and the several lenders from time to time parties
thereto, as amended, supplemented or otherwise modified from time to time, or
any extension, refinancing or replacement thereof, whether with the same or a
different group of lenders.

      "S&P" means Standard & Poor's Rating Group, a division of The McGraw Hill
Companies, Inc. on the date hereof or its successor.

      "Sale and Leaseback Transaction" of any Person means any arrangement
entered into by such Person or any Subsidiary of such Person, directly or
indirectly, whereby such Person or any Subsidiary of such Person shall sell or
transfer any property (other than the property listed on Schedule XII), whether
now owned or hereafter acquired to any other Person (a "Transferee"), and
whereby such first Person or

                                      -16-
<PAGE>

any Subsidiary of such first Person shall then or thereafter rent or lease as
lessee such property or any part thereof or rent or lease as lessee from such
Transferee or any other Person other property which such first Person or any
Subsidiary of such first Person intends to use for substantially the same
purpose or purposes as the property sold or transferred.

      "Security Agreements" means the Western Midstream Security Agreement, the
Pledge and each security agreement delivered pursuant to Section 5.1(g).

      "Security Documents" means the Security Agreements, the Real Property
Mortgages and, for purposes of Sections 2.5(e) and 8.15, Article VII, paragraph
(v) of Schedule IX-1, paragraph (q) of Schedule IX-2 and any Transfer Agreement
only, any security agreement or pledge delivered in order to comply with Section
5.2(m).

      "Solvent" and "Solvency" means, with respect to any Person on a particular
date, that on such date (a) the fair value of the property of such Person is
greater than the total amount of liabilities, including contingent liabilities,
of such Person, (b) the present fair salable value of the assets of such Person
is not less than the amount that will be required to pay the probable liability
of such Person on its debts as they become absolute and matured, (c) such Person
does not intend to, and does not believe that it will, incur debts or
liabilities beyond such Person's ability to pay such debts and liabilities as
they mature and (d) such Person is not engaged in business or a transaction, and
is not about to engage in business or a transaction, for which such Person's
property would constitute an unreasonably small capital. The amount of
contingent liabilities at any time shall be computed as the amount that, in the
light of all the facts and circumstances existing at such time, represents the
amount that can reasonably be expected to become an actual or matured liability.

      "SPC" has the meaning specified in Section 8.5(g).

      "Specified Escrow Arrangements" means (a) encumbrances arising under the
Pledge and Assignment Agreement for the Purchase Card Agreement, whereby TWC has
requested the continued issuance of credit under the Purchase Card Agreement;
and (b) cash deposits at one or more financial institutions for the purpose of
funding any potential shortfall in the daily net cash position of TWC or any of
its Subsidiaries.

      "Subsidiary" of any Person means any corporation, partnership, joint
venture or other Business Entity of which more than 50% of the outstanding
Equity Interests having ordinary voting power to elect a majority of the board
of directors of such corporation, partnership, joint venture or other Business
Entity or others performing similar functions (irrespective of whether or not at
the time Equity Interests of any other class or classes of such corporation,
partnership, joint venture or other Business Entity shall or might have voting
power upon the occurrence of any contingency) is at the time directly or
indirectly owned by such Person.

      "Syndication Agent" means BofA in its capacity as syndication agent
hereunder.

      "Termination Date" means the earlier of (i) May 3, 2007 or (ii) the date
of termination in whole of the Commitments pursuant to Section 2.4 or 6.1.

      "Termination Event" means (i) a "reportable event", as such term is
described in Section 4043(c) of ERISA (other than a "reportable event" not
subject to the provision for 30-day notice to the PBGC or a "reportable event"
as such term is described in Section 4043(c)(3) of ERISA) which could reasonably
be expected to result in a termination of, or the appointment of a trustee to
administer, a Plan, or which causes any Credit Party, due to actions of the
PBGC, to be required to contribute at least $125,000,000 in

                                      -17-
<PAGE>

excess of the contributions which otherwise would have been made to fund a Plan
based upon the contributions recommended by such Plan's actuary, or (ii) the
withdrawal of a Credit Party or any ERISA Affiliate of a Credit Party from a
Multiple Employer Plan during a plan year in which it was a "substantial
employer," as such term is defined in Section 4001(a)(2) of ERISA, or the
incurrence of liability by a Credit Party or any ERISA Affiliate of a Credit
Party under Section 4064 of ERISA upon the termination of a Plan or Multiple
Employer Plan, or (iii) the institution of proceedings to terminate a Plan by
the PBGC under Section 4042 of ERISA, or (iv) any other event or condition which
could reasonably be expected to result in the termination of, or the appointment
of, a trustee to administer, any Plan under Section 4042 of ERISA, other than
(in the case of clauses (ii), (iii) and (iv) of this definition) where the
matters described on such clauses, in the aggregate, could not reasonably be
expected to have a Material Adverse Effect in respect of any Borrower.

      "TGPL" has the meaning specified in the recitals hereto.

      "Trading Book" means the trading transactions of Williams Power and its
Subsidiaries, inclusive of structured portfolio transactions, consisting
primarily of tolling and full requirements transactions.

      "Trading Book Termination Date" means the date on which all or
substantially all of the Trading Book is sold or otherwise disposed of and all
or substantially all of the liabilities and obligations of TWC and its
Subsidiaries related to the Trading Book are terminated.

      "Transfer Agreement" means an agreement executed pursuant to Section 8.5
by an assignor Bank and assignee Bank substantially in the form of Exhibit C,
which agreement shall be executed by the Borrowers, the Issuing Banks and the
Agent to evidence the consent of each if such consent is required pursuant to
the definition herein of "Eligible Assignee" or the terms of Section 8.5.

      "TWC" has the meaning specified in the recitals hereto.

      "Type" has the meaning set forth in the definition herein of Revolving
Credit Advance.

      "Unrated" means, as to any Borrower, that no senior unsecured long-term
debt of such Borrower is rated by S&P and no senior unsecured long-term debt of
such Borrower is rated by Moody's.

      "Unused Revolving Credit Commitment" means, with respect to each Bank for
each Borrower at any time, (a) such Bank's Revolving Credit Commitment for such
Borrower at such time minus (b) the sum of (i) the aggregate principal amount of
all Revolving Credit Advances owed by such Borrower to such Bank and outstanding
at such time and (ii) such Bank's aggregate Letter of Credit Liabilities for all
Letters of Credit issued at the request of such Borrower.

      "Wamsutter Gathering System" means the assets described on Schedule XI.

      "Western Midstream Assets" means all assets now or hereafter existing that
are either individually, or in conjunction with other Western Midstream Assets,
an intrinsic part of the Western Midstream Business, except that "Western
Midstream Assets" shall not include any Excluded Assets.

      "Western Midstream Business" means the business of gathering, marketing,
dehydrating, treating, processing, fractionating, storing, selling and
transporting Hydrocarbons directly related to the Southwest Wyoming, Wamsutter,
San Juan Conventional, Manzanares and Torre Alta systems referred to in the
Information Memorandum; provided, that "Western Midstream Business" shall not
include (i) operations that are directly related to the exploration and
production of Hydrocarbons, and (ii) the interstate transportation and storage
of natural gas and associated liquid hydrocarbons under the jurisdiction of the

                                      -18-
<PAGE>

Natural Gas Act. For the avoidance of doubt, "Western Midstream Business" shall
not include any Subsidiaries of WFSGI other than the Western Midstream
Subsidiaries.

      "Western Midstream Guaranty" means the guaranty executed by WFSC, WGPC and
WGPWC in substantially the form of Exhibit E-2, as amended, supplemented or
otherwise modified from time to time.

      "Western Midstream Security Agreement" means the security agreement
executed by WFSC, WGPC and WGPWC in substantially the form of Exhibit G, as
amended, supplemented or otherwise modified from time to time.

      "Western Midstream Subsidiaries" means WFSC, WGPC, WGPWC and each other
Subsidiary of WFSGI that owns any part of the Western Midstream Business.

      "WFSC" means Williams Field Services Company, a Delaware corporation.

      "WFSC Mortgage" means the Mortgage, Assignment of Rents and Leases,
Security Agreement, Fixture Filing, and Financing Statement to be filed in
Colorado, the Line of Credit Mortgage, Assignment of Rents and Leases, Security
Agreement, Fixture Filing, and Financing Statement to be filed in New Mexico,
and the Mortgage, Assignment of Rents and Leases, Security Agreement, Fixture
Filing, and Financing Statement to be filed in Wyoming executed by WFSC in
substantially the form of Exhibit H, as amended, supplemented or otherwise
modified from time to time.

      "WFSGI" means Williams Field Services Group, Inc, a Delaware corporation.

      "WGPC " means Williams Gas Processing Company, a Delaware corporation.

      "WGPC Mortgage" means the Mortgage, Assignment of Rents and Leases,
Security Agreement, Fixture Filing, and Financing Statement to be filed in
Colorado, the Line of Credit Mortgage, Assignment of Rents and Leases, Security
Agreement, Fixture Filing, and Financing Statement to be filed in New Mexico,
and the Mortgage, Assignment of Rents and Leases, Security Agreement, Fixture
Filing, and Financing Statement to be filed in Wyoming executed by WGPC in
substantially the form of Exhibit H, as amended, supplemented or otherwise
modified from time to time.

      "WGPWC" means Williams Gas Processing-Wamsutter Company, a Delaware
corporation.

      "WGPWC Mortgage" means the Mortgage, Assignment of Rents and Leases,
Security Agreement, Fixture Filing, and Financing Statement to be filed in
Wyoming executed by WGPWC in substantially the form of Exhibit H, as amended,
supplemented or otherwise modified from time to time.

      "Wholly-Owned Subsidiary" of any Person means any Subsidiary of such
Person all of the Equity Interests in which are owned by such Person and/or one
or more other Wholly-Owned Subsidiaries of such Person.

      "Williams Power" means Williams Power Company, a Delaware corporation, and
its Subsidiaries.

      "'Withdrawal Liability" shall have the meaning given such term under Part
I of Subtitle E of Title IV of ERISA.

                                      -19-
<PAGE>

      SECTION 1.2. Computation of Time Periods. In this Agreement in the
computation of periods of time from a specified date to a later specified date,
the word "from" means "from and including" and the words "to" and "until" each
means "to but excluding".

      SECTION 1.3. Accounting Terms. All accounting terms not specifically
defined shall be construed in accordance with GAAP. To the extent there are any
changes in GAAP from the date of this Agreement, the financial covenants set
forth herein will continue to be determined in accordance with GAAP in effect on
the Effective Date, as applicable, until such time, if any, as such financial
covenants are adjusted or reset to reflect such changes in GAAP and such
adjustments or resets are agreed to in writing by the Borrowers and the Agent
(after consultation with the Majority Banks).

      SECTION 1.4. Miscellaneous. The words "hereof", "herein" and "hereunder"
and words of similar import when used in this Agreement shall refer to this
Agreement as a whole and not to any particular provision of this Agreement, and
Article, Section, Schedule and Exhibit references are to Articles and Sections
of and Schedules and Exhibits to this Agreement, unless otherwise specified. The
term "including" shall mean "including, without limitation". References to any
document, instrument or agreement (a) shall include all exhibits, schedules and
other attachments thereto, (b) shall include all documents, instruments or
agreements issued or executed in replacement thereof and (c) shall mean such
document, instrument or agreement, or replacement or predecessor thereto, as
amended, modified and supplemented from time to time and in effect at any given
time so long as such amended, modified or supplemented document, instrument or
agreement does not violate the terms of this Agreement.

      SECTION 1.5. Ratings. A rating, whether public or private, by S&P or
Moody's shall be deemed to be in effect on the date of announcement or
publication by S&P or Moody's, as the case may be, of such rating or, in the
absence of such announcement or publication, on the effective date of such
rating and will remain in effect until the announcement or publication of, or in
the absence of such announcement or publication, the effective date of, any
change in, or withdrawal or termination of, such rating. In the event the
standards for any rating by Moody's or S&P are revised, or any such rating is
designated differently (such as by changing letter designations to different
letter designations or to numerical designations), the references herein to such
rating shall be deemed to refer to the revised or redesignated rating for which
the standards are closest to, but not lower than, the standards at the date
hereof for the rating which has been revised or redesignated, all as determined
by the Majority Banks in good faith. Long-term debt supported by a letter of
credit, guaranty, insurance or other similar credit enhancement mechanism shall
not be considered as senior unsecured long-term debt.

                                   ARTICLE II

                    AMOUNTS AND TERMS OF THE REVOLVING CREDIT
                         ADVANCES AND LETTERS OF CREDIT

      SECTION 2.1. Revolving Credit Advances and Letters of Credit.

      (a) Revolving Credit Advances. Each Bank severally agrees, on the terms
and conditions hereinafter set forth, to make Revolving Credit Advances to each
Borrower from time to time on any Business Day during the period from the
Effective Date until the Termination Date; provided that in no event shall the
sum of the aggregate amount of all Revolving Credit Advances owed to such Bank
outstanding to such Borrower plus the aggregate amount of all Letter of Credit
Liabilities held by such Bank for all Letters of Credit issued at the request of
such Borrower exceed at any time such Bank's Revolving Credit Commitment for
such Borrower at such time; provided further that in no event shall the sum of
the aggregate amount of all Revolving Credit Advances to all Borrowers owed to
any Bank plus the aggregate amount of all Letter Credit Liabilities held by such
Bank for all Letters of Credit exceed the

                                      -20-
<PAGE>

Revolving Credit Commitment of such Bank for TWC. Each Revolving Credit
Borrowing to a Borrower shall be in an aggregate amount of $5,000,000 or an
integral multiple of $1,000,000 in excess thereof and shall consist of Revolving
Credit Advances made on the same day by the Banks ratably according to their
respective Revolving Credit Commitments for such Borrower. Within the limits of
this Section 2.1(a), a Borrower may borrow under this Section 2.1(a), prepay
pursuant to Section 2.5 and reborrow under this Section 2.1(a).

      (b) Letters of Credit. Each Issuing Bank agrees, on the terms and
conditions hereinafter set forth, to issue letters of credit in Dollars at the
request of any Borrower (such issuance, and any funding of a draw thereunder,
are deemed made by the Issuing Banks in reliance on the agreements of the other
Banks pursuant to Section 2.2) from time to time on any Business Day during the
period from the Effective Date until 30 days prior to the Termination Date in an
aggregate Available Amount (i) for all Letters of Credit issued by the Issuing
Banks not to exceed at any time the aggregate of all Letter of Credit
Commitments at such time, (ii) for all Letters of Credit issued by any Issuing
Bank not to exceed at any time the Letter of Credit Commitment of such Issuing
Bank at such time, (iii) for all Letters of Credit outstanding at any time
issued at the request of any Borrower not to exceed an amount equal to the
Revolving Credit Commitments of the Banks for such Borrower at such time minus
the aggregate amount of all Revolving Credit Advances outstanding to such
Borrower at such time; provided that in no event shall the sum of the aggregate
amount of all Revolving Credit Advances to all Borrowers owed to any Bank plus
the aggregate amount of all Letter of Credit Liabilities held by such Bank for
all Letters of Credit exceed the Revolving Credit Commitment of such Bank for
TWC. No Letter of Credit shall have an expiration date (including all rights of
a Borrower or the beneficiary to require renewals) later than 7 Business Days
prior to the date set forth in clause (i) of the definition herein of
Termination Date. Within the limits referred to above, a Borrower may request
the issuance of Letters of Credit under this Section 2.1(b), repay any Letter of
Credit Liability resulting from drawings thereunder pursuant to Section 2.2(c)
and request the issuance of additional Letters of Credit under this Section
2.1(b).

      SECTION 2.2. Issuance of and Drawings and Reimbursement Under Letters of
Credit.

      (a) Notice of Issuance. A Borrower shall give the Agent and the Issuing
Bank from which it is requesting a Letter of Credit at least three Business
Days' (or such shorter period as agreed to by the Agent and such Issuing Bank)
prior notice, in the form of Exhibit D-1 (a "Notice of Letter of Credit"),
specifying the Business Day such Letter of Credit is to be issued and the
account party or parties therefor and describing in reasonable detail the
proposed terms of such Letter of Credit (including the beneficiary thereof) and
the nature of the transactions or obligations proposed to be supported thereby;
provided that no Borrower may request a Letter of Credit to support any Debt or
for any unlawful purpose. The Issuing Bank issuing any Letter of Credit may
specify therein whether such Letter of Credit will be subject to the
International Standby Practices, the Uniform Customs and Practices or other
practices. A Letter of Credit will be deemed to be issued at the request of (i)
NWP, if NWP gives the Notice of Letter of Credit in respect of such Letter of
Credit; (ii) TGPL, if TGPL gives the Notice of Letter of Credit in respect of
such Letter of Credit and (iii) TWC, if neither NWP nor TGPL gives the Notice of
Letter of Credit in respect of such Letter of Credit.

      (b) Participations in Letters of Credit. On each day during the period
commencing with the issuance by any Issuing Bank of any Letter of Credit at the
request of any Borrower and until such Letter of Credit shall have expired or
been terminated, the Letter of Credit Commitment of each Issuing Bank shall be
deemed to be utilized for all purposes of this Agreement in an amount equal to
the Available Amount of such Letter of Credit. Each Bank agrees that, upon the
issuance of any Letter of Credit hereunder by any Issuing Bank, it shall
automatically acquire a participation in such Issuing Bank's liability under
such Letter of Credit in an amount equal to such Bank's LC Participation
Percentage of such liability, and each Bank thereby shall absolutely,
unconditionally and irrevocably assume, as primary

                                      -21-
<PAGE>

obligor and not as surety, liability to pay such amount and shall be
unconditionally obligated to such Issuing Bank to the extent provided in this
Section 2.2.

      (c) Reimbursement Obligations; Notice of Drawings. Upon receipt from the
beneficiary of any Letter of Credit of any demand for payment under such Letter
of Credit, the Issuing Bank that issued such Letter of Credit shall promptly
notify the applicable Borrower (through the Agent) of the amount to be paid by
such Issuing Bank as a result of such demand and the date on which payment is to
be made by such Issuing Bank to such beneficiary in respect of such demand,
which shall be (unless same day payment is required by the terms of such Letter
of Credit pursuant to a request of such Borrower) at least one Business Day
after the date on which the Agent shall deliver such notice to the applicable
Borrower pursuant to this sentence. Each Borrower hereby unconditionally agrees
to pay and reimburse the Agent for the account of the Issuing Bank that issued a
Letter of Credit at the request of such Borrower for the amount of each demand
for payment under such Letter of Credit that is in substantial compliance with
the provisions of such Letter of Credit at or prior to the date on which payment
is to be made by such Issuing Bank to the beneficiary thereunder (or on the next
Business Day, if same day payment is required by the terms of such Letter of
Credit pursuant to a request of such Borrower and if the notice to such Borrower
from such Issuing Bank in respect of such demand contemplated by the first
sentence of this Section 2.2(c) is not given prior to 9:00 a.m. (New York City
time) on such date), without presentment, demand, protest or other formalities
of any kind, in each case together with interest thereon at a rate per annum
equal to the Base Rate plus the Applicable Margin in effect from time to time
for such Borrower as to Base Rate Advances, for the period from the date of such
demand until the date of such reimbursement. Each Borrower's obligations to
reimburse each Issuing Bank as provided herein shall be absolute, unconditional
and irrevocable under all circumstances whatsoever, including the following
circumstances: (i) any lack of validity of this Agreement, the other Credit
Documents or the other documents to be delivered under this Agreement; (ii) the
existence of any claim, set-off, defense or other right that a Borrower may have
at any time against the Agent, any Bank, any Issuing Bank or any other Person,
whether in connection with the transactions contemplated by this Agreement or
any unrelated transaction; (iii) any action or inaction taken or suffered by any
Issuing Bank under a Letter of Credit if taken in good faith and in conformity
with applicable law; (iv) the payment by any Issuing Bank under a Letter of
Credit against presentation of a demand, statement or other document which in
the sole discretion of such Issuing Bank substantially complies with the terms
of such Letter of Credit, including any demand, statement or other document
which is forged, fraudulent, invalid or inaccurate in any respect; (v) any
exchange, release or non-perfection of any collateral for, or any release or
amendment or waiver of or consent to departure from any guarantee of, all or any
of the Obligations in respect of any Letter of Credit; and (vi) any
determination of invalidity or unenforceability with respect to any Letter of
Credit after payment by an Issuing Bank thereunder.

      (d) Payments by Banks to Issuing Banks. To the extent that a Borrower
fails to make any payment to an Issuing Bank that such Borrower is required to
make pursuant to Section 2.2(c), each Bank (other than such Issuing Bank) shall
pay to the Agent, for the account of such Issuing Bank in Dollars and in
immediately available funds, the amount of such Bank's LC Participation
Percentage of any payment under a Letter of Credit upon notice by such Issuing
Bank (through the Agent) to such Bank requesting such payment and specifying
such amount. Each such Bank's obligation to make such payment to the Agent for
the account of such Issuing Bank under this Section 2.2(d), and such Issuing
Bank's right to receive the same, shall be absolute and unconditional and shall
not be affected by any circumstance whatsoever other than the gross negligence
or willful misconduct of such Issuing Bank in making payment under such Letter
of Credit, including the failure of any other Bank to make its payment under
this Section 2.2(d), the financial condition of a Borrower (or any other
Person), the existence of any Event of Default, any amendment, extension or
other modification of any Letter of Credit or the reduction or termination of
the Letter of Credit Commitments or the Revolving Credit Commitments. If any
Bank shall default in its obligation to make any such payment to the Agent for
the account of an Issuing Bank,

                                      -22-
<PAGE>

for so long as such default shall continue the Agent may, at the request of such
Issuing Bank, withhold from any payments received by the Agent under this
Agreement for the account of such Bank the amount so in default and, to the
extent so withheld, pay the same to such Issuing Bank for application to such
defaulted obligation.

      (e) Participations in Reimbursement Obligations. Upon the making of each
payment by a Bank to an Issuing Bank pursuant to Section 2.2(d) in respect of
any Letter of Credit, such Bank shall, automatically and without any further
action on the part of the Agent, any Issuing Bank or such Bank, acquire (i) a
funded participation in an amount equal to such payment in the Reimbursement
Obligation owing to such Issuing Bank by the applicable Borrower hereunder and
under the Letter of Credit Documents relating to such Letter of Credit and (ii)
a participation in a percentage equal to such Bank's LC Participation Percentage
in any interest or other amounts payable by the applicable Borrower hereunder
and under such Letter of Credit Documents in respect of such Reimbursement
Obligation (other than the Fronting Fee contemplated by Section 2.11(b)(i)).
Upon receipt by any Issuing Bank from or for the account of a Borrower of any
payment in respect of any Reimbursement Obligation or any such interest or other
amount (including by way of setoff or application of proceeds of any collateral
security or the withdrawal and application of funds from the LC Cash Collateral
Account in respect of such Borrower), such Issuing Bank shall promptly pay to
the Agent, for the account of each Bank entitled thereto, such Bank's LC
Participation Percentage of such payment, each such payment by such Issuing Bank
to be made in the same currency and funds in which received by such Issuing
Bank. In the event any payment received by any Issuing Bank and so paid to the
Banks hereunder is rescinded or must otherwise be returned by such Issuing Bank,
each Bank shall, upon the request of such Issuing Bank (through the Agent),
repay to such Issuing Bank (through the Agent) the portion of such payment paid
to such Bank.

      (f) Information Provided by Issuing Banks to Banks. Promptly after the
issuance of or amendment to any Letter of Credit, the Issuing Bank that issued
such Letter of Credit will notify the Agent and the applicable Borrower in
writing of such issuance or amendment and such notice shall be accompanied by a
copy of such issued or amended Letter of Credit. Upon receipt of such notice,
the Agent shall notify each Bank of such issuance or amendment and, if requested
by a Bank, the Agent shall provide such Bank with copies of such issued or
amended Letter of Credit and any Letter of Credit Documents related thereto
delivered to the Agent.

      (g) Conditions Precedent to Issuance and Modification. The issuance by any
Issuing Bank of a Letter of Credit shall be subject to satisfaction of each of
the conditions precedent set forth in Section 3.2, and shall further be subject
to the conditions precedent that (i) such Letter of Credit shall be in such form
and contain such terms as shall be reasonably satisfactory to such Issuing Bank
consistent with its then current practices and procedures of general
applicability with respect to letters of credit of the same type and (ii) the
applicable Borrower shall have executed and delivered such applications,
agreements and other instruments relating to such Letter of Credit as such
Issuing Bank shall have reasonably requested consistent with its then current
practices and procedures of general applicability with respect to letters of
credit of the same type; provided that in the event of any conflict between any
such application, agreement or other instrument and the provisions of this
Agreement, the provisions of this Agreement shall control. The issuance by any
Issuing Bank of any amendment, modification or supplement to any Letter of
Credit hereunder which increases the stated amount thereof shall be subject to
the same conditions applicable under this Section 2.2 (including the conditions
set forth in Section 3.2) to the issuance of new Letters of Credit, and no such
amendment, modification or supplement shall be issued hereunder unless the
Letter of Credit affected thereby would have complied with such conditions had
it originally been issued hereunder in such amended, modified or supplemented
form.

                                      -23-
<PAGE>

      (h) Interest Payable to Issuing Banks by Banks. To the extent that any
Bank shall fail to pay any amount required to be paid pursuant to Sections
2.2(d) or (e) on the due date therefor, such Bank shall pay interest to the
Issuing Bank owed such amount (through the Agent) on such amount from and
including such due date to but excluding the date such payment is made at a rate
per annum equal to the Federal Funds Rate.

      (i) Indemnification of the Banks, Issuing Banks and Agent. The Borrowers
hereby indemnify and hold harmless each Bank, each Issuing Bank and the Agent
from and against any and all claims, damages, losses, liabilities, costs and
expenses that such Bank, such Issuing Bank or the Agent may incur (or that may
be claimed against such Bank, such Issuing Bank or the Agent by any Person
whatsoever) by reason of or in connection with the execution and delivery or
transfer of or payment or refusal to pay by each Issuing Bank under any Letter
of Credit (EXPRESSLY INCLUDING ANY SUCH CLAIM, DAMAGE, LOSS, LIABILITY OR
EXPENSE ATTRIBUTABLE TO THE ORDINARY, SOLE OR CONTRIBUTORY NEGLIGENCE OF SUCH
BANK, SUCH ISSUING BANK OR THE AGENT, AS THE CASE MAY BE, BUT EXCLUDING ANY SUCH
CLAIM, DAMAGE, LOSS, LIABILITY OR EXPENSE ATTRIBUTABLE TO THE GROSS NEGLIGENCE
OR WILLFUL MISCONDUCT OF SUCH BANK, SUCH ISSUING BANK OR THE AGENT, AS THE CASE
MAY BE). IT IS THE INTENT OF THE PARTIES HERETO THAT EACH BANK, EACH ISSUING
BANK OR THE AGENT, AS THE CASE MAY BE, SHALL, TO THE EXTENT PROVIDED IN THIS
SECTION 2.2(I), BE INDEMNIFIED FOR ITS OWN ORDINARY, SOLE OR CONTRIBUTORY
NEGLIGENCE; provided that the Borrowers shall not be required to indemnify any
Bank, any Issuing Bank or the Agent for any claims, damages, losses,
liabilities, costs or expenses to the extent, but only to the extent, caused by
(A) in the case of each Issuing Bank, the willful misconduct or gross negligence
of such Issuing Bank in determining whether a request presented under any Letter
of Credit complied with the terms of such Letter of Credit or (B) in the case of
any Bank, such Bank's failure to pay its Letter of Credit Liabilities pursuant
to Sections 2.2(d), (e) and (h).

      (j) Existing Letters of Credit. All Existing Letters of Credit shall be
deemed to be issued under this Agreement as of the Effective Date at the request
of TWC and shall constitute Letters of Credit hereunder for all purposes
(including Section 2.2(b) and Section 2.2(d)), and no notice requesting issuance
thereof shall be required hereunder. Each reference herein to the issuance of a
Letter of Credit shall include any such deemed issuance. The issuing bank listed
on Schedule VII for any Existing Letter of Credit shall be the Issuing Bank for
purposes of such Existing Letter of Credit. All fees accrued on the Existing
Letters of Credit to but excluding the Effective Date shall be for the account
of the relevant "Issuing Bank" and the "Banks" (as those terms are used in the
Existing Agreement) as provided in the Existing Agreement, and all fees accruing
on the Existing Letters of Credit on and after the Effective Date shall be for
the account of the relevant Issuing Bank thereof and the Banks as provided
herein.

      (k) Cash Collateral. If any amounts are deposited in the LC Cash
Collateral Account in respect of TWC pursuant to Section 2.5(d), such amounts
shall be applied first, to pay Reimbursement Obligations in respect of Letters
of Credit issued at the request of TWC outstanding at the time of such deposit
and, second, either (i) if at the time all such Letters of Credit terminate and
all such Reimbursement Obligations are paid no Event of Default has occurred and
is continuing (or if the Agent has not declared all amounts hereunder to be due
and payable), returned to TWC or (ii) if at such time an Event of Default has
occurred and is continuing (and if the Agent has declared all amounts owed
hereunder to be due and payable), held by the Agent in the LC Cash Collateral
Account in respect of TWC in accordance with Section 6.2.

      (l) Applicability of ISP98 (ICC Publication No. 59). Unless otherwise
expressly agreed by an Issuing Bank and a Borrower when a Letter of Credit is
issued or except as otherwise specifically provided in respect of an Existing
Letter of Credit, the rules of the "International Standby Practices 1998"

                                      -24-
<PAGE>

published by the Institute of International Banking Law & Practice, Inc. (or
such later version thereof as may be in effect at the time of issuance) shall
apply to each Letter of Credit.

      SECTION 2.3. Making the Revolving Credit Advances.

      (a) Each Revolving Credit Borrowing shall be made on notice, given not
later than 11:00 a.m. (New York City time) on the third Business Day prior to
the date of the proposed Revolving Credit Borrowing in the case of a Revolving
Credit Borrowing consisting of Eurodollar Rate Advances, or 10:00 a.m. (New York
City time) on the Business Day of the proposed Revolving Credit Borrowing in the
case of a Revolving Credit Borrowing consisting of Base Rate Advances, by the
Borrower requesting such Revolving Credit Borrowing to the Agent, which shall
give to each Bank prompt notice thereof. Each such notice of a Revolving Credit
Borrowing (a "Notice of Revolving Credit Borrowing") shall be by telephone,
confirmed immediately in writing, or telecopier in substantially the form of
Exhibit D-2 hereto, specifying therein the requested (i) date of such Revolving
Credit Borrowing, (ii) Type of Revolving Credit Advances, (iii) aggregate amount
of such Revolving Credit Borrowing, and (iv) in the case of a Revolving Credit
Borrowing consisting of Eurodollar Rate Advances, initial Interest Period for
each such Revolving Credit Advance. Each Bank shall, before 12:00 p.m. (New York
City time) on the date of such Revolving Credit Borrowing, make available for
the account of its Applicable Lending Office to the Agent at its address
referred to in Section 8.2 (excluding, for such purpose, any address to which
copies are to be sent), in same day funds, such Bank's ratable portion of such
Revolving Credit Borrowing. After the Agent's receipt of such funds and upon
fulfillment of the applicable conditions set forth in Section 3.2, the Agent
will make such funds available to the Borrower requesting such Revolving Credit
Borrowing at such address.

      (b) Anything in Section 2.3(a) to the contrary notwithstanding, a Borrower
may not select Eurodollar Rate Advances for any Revolving Credit Borrowing if
the obligation of the Banks to make Eurodollar Rate Advances shall then be
suspended pursuant to Sections 2.3(e), 2.14 or 2.16.

      (c) No Borrower may select Eurodollar Rate Advances for any Revolving
Credit Borrowing if the aggregate amount of such Revolving Credit Borrowings is
less than $5,000,000.

      (d) Each Notice of Revolving Credit Borrowing shall be irrevocable and
binding on such Borrower. In the case of any Revolving Credit Borrowing that the
related Notice of Revolving Credit Borrowing specifies is to be comprised of
Eurodollar Rate Advances, the Borrower requesting such Borrowing shall indemnify
each Bank against any loss, cost or expense incurred by such Bank as a result of
any failure by such Borrower to fulfill on or before the date specified in such
Notice of Revolving Credit Borrowing for such Revolving Credit Borrowing the
applicable conditions set forth in Article III or as a result of a cancellation
pursuant to Section 2.3(f), including any loss (excluding loss of anticipated
profits), cost or expense incurred by reason of the liquidation or reemployment
of deposits or other funds acquired by such Bank to fund the Revolving Credit
Advance to be made by such Bank as part of such Revolving Credit Borrowing when
such Revolving Credit Advance, as a result of such failure or cancellation, is
not made on such date.

      (e) If the Agent is unable to determine the Eurodollar Rate for Eurodollar
Rate Advances, the obligation of the Banks to make, or to Convert Revolving
Credit Advances into, Eurodollar Rate Advances shall be suspended until the
Agent shall notify the Borrowers and the Banks that the circumstances causing
such suspension no longer exist, and, except as provided in Section 2.3(f), each
Revolving Credit Advance comprising any requested Revolving Credit Borrowing
shall be a Base Rate Advance.

                                      -25-
<PAGE>

      (f) If a Borrower has requested a proposed Revolving Credit Borrowing
consisting of Eurodollar Rate Advances and as a result of circumstances referred
to in Section 2.3(e), Section 2.14(b) or Section 2.16 such Revolving Credit
Borrowing would not consist of Eurodollar Rate Advances, such Borrower may, by
notice given not later than 3:00 p.m. (New York City time) at least one Business
Day prior to the date such proposed Revolving Credit Borrowing would otherwise
be made, cancel such Revolving Credit Borrowing, in which case such Revolving
Credit Borrowing shall be cancelled and no Revolving Credit Advances shall be
made as a result of such requested Revolving Credit Borrowing, but such Borrower
shall indemnify the Banks in connection with such cancellation as contemplated
by Section 2.3(d).

      (g) Unless the Agent shall have received notice from a Bank prior to the
date of any Revolving Credit Borrowing that such Bank will not make available to
the Agent such Bank's ratable portion of such Revolving Credit Borrowing, the
Agent may assume that such Bank has made such portion available to the Agent on
the date of such Revolving Credit Borrowing in accordance with Section 2.3(a)
and the Agent may, in reliance upon such assumption, make available to a
Borrower on such date a corresponding amount. If and to the extent that such
Bank shall not have so made such ratable portion available to the Agent, such
Bank and Borrower severally agree to repay to the Agent forthwith on demand such
corresponding amount together with interest thereon, for each day from the date
such amount is made available to such Borrower until the date such amount is
repaid to the Agent, at (i) in the case of such Borrower, the interest rate
applicable at the time to Revolving Credit Advances comprising such Revolving
Credit Borrowing and (ii) in the case of such Bank, the Federal Funds Rate. If
such Bank shall repay to the Agent such corresponding amount, such amount so
repaid shall constitute such Bank's Revolving Credit Advance as part of such
Revolving Credit Borrowing for purposes of this Agreement and such Borrower
shall be relieved of its obligations to repay on demand such amount under this
Section 2.3(g).

      (h) The failure of any Bank to make the Revolving Credit Advance to be
made by it as part of any Revolving Credit Borrowing shall not relieve any other
Bank of its obligation, if any, hereunder to make its Revolving Credit Advance
on the date of such Revolving Credit Borrowing, but no Bank shall be responsible
for the failure of any other Bank to make any Revolving Credit Advance to be
made by such other Bank.

      SECTION 2.4. Reduction of the Commitments. (a) Each Borrower shall have
the right, upon at least three Business Days notice to the Agent, to terminate
in whole or reduce ratably in part (i) the Unused Revolving Credit Commitments
for such Borrower and (ii) the unused portions of the Letter of Credit
Commitments; provided that each partial reduction shall be in the aggregate
amount of $5,000,000 or an integral multiple of $1,000,000 in excess thereof and
shall be made ratably among the Banks or Issuing Banks, as the case may be, in
accordance with their respective Commitments for such Borrower or Letter of
Credit Commitments, as the case may be, and provided further that the aggregate
amount of the Letter of Credit Commitments shall not be reduced to an amount
which is less than the aggregate amount of all Letter of Credit Liabilities in
respect of all Letters of Credit; and provided further that the Revolving Credit
Commitments for TWC shall not be reduced to an amount which is less than the
greatest, for any Borrower, of the sum of (i) the aggregate outstanding
principal amount of Revolving Credit Advances owed by such Borrower plus (ii)
the aggregate amount of all Letter of Credit Liabilities in respect of Letters
of Credit issued at the request of such Borrower; and provided further that the
Revolving Credit Commitments for any Borrower shall not be reduced to an amount
which is less than the sum of (i) the aggregate outstanding principal amount of
Revolving Credit Advances owed by such Borrower plus (ii) the aggregate amount
of all Letter of Credit Liabilities in respect of Letters of Credit issued at
the request of such Borrower; and provided further that the Revolving Credit
Commitments for TWC shall not be reduced to an amount which is less than the
aggregate amount of the Letter of Credit Commitments. Each termination or
reduction of any Commitment shall be permanent.

                                      -26-
<PAGE>

      (b) The respective Revolving Credit Commitments of the Banks for TWC shall
automatically be ratably reduced, on each Excess Proceeds Payment Date in
respect of any Excess Proceeds, by an amount equal to the amount of such Excess
Proceeds.

      (c) If on any date (i) the respective Revolving Credit Commitments of the
Banks for TWC are reduced pursuant to Section 2.4(b) and (ii) after giving
effect to such reduction, the aggregate Revolving Credit Commitments of the
Banks for TGPL would exceed the aggregate Revolving Credit Commitments of the
Banks for TWC, then the respective Revolving Credit Commitments of the Banks for
TGPL shall automatically be ratably reduced on such date by an amount equal to
such excess.

      (d) If on any date (i) the respective Revolving Credit Commitments of the
Banks for TWC are reduced pursuant to Section 2.4(b) and (ii) after giving
effect to such reduction, the aggregate Revolving Credit Commitments of the
Banks for NWP would exceed the aggregate Revolving Credit Commitments of the
Banks for TWC, then the respective Revolving Credit Commitments of the Banks for
NWP shall automatically be ratably reduced on such date by an amount equal to
such excess.

      SECTION 2.5. Prepayments. (a) Each Borrower may, upon notice to the Agent,
(i) before 10:00 a.m. (New York City time) for Base Rate Advances on the date of
prepayment and (ii) upon at least two Business Days' notice to the Agent for
Eurodollar Rate Advances, stating the proposed date and aggregate principal
amount of the prepayment, and if such notice is given such Borrower shall,
prepay the outstanding principal amount of the Revolving Credit Advances
comprising part of the same Revolving Credit Borrowing in whole or ratably in
part, together with accrued interest to the date of such prepayment on the
principal amount prepaid and amounts, if any, required to be paid pursuant
Section 8.4(c) as a result of such prepayment; provided that each prepayment
pursuant to this Section 2.5(a) shall be in an aggregate principal amount of
$5,000,000 or an integral multiple of $1,000,000 in excess thereof.

      (b) TWC shall ratably repay the Revolving Credit Advances in a principal
amount equal to 100% of all Excess Proceeds on each Excess Proceeds Payment Date
in respect of such Excess Proceeds.

      (c) Additionally, if at any date the sum of the aggregate amount of all
Revolving Credit Advances owed to any Bank by any Borrower plus the aggregate
amount of all Letter of Credit Liabilities held by such Bank for all Letters of
Credit issued at the request of such Borrower exceeds such Bank's Revolving
Credit Commitment for such Borrower at such date, such Borrower shall, on such
date, ratably repay the Revolving Credit Advances owed by such Borrower in a
principal amount necessary so that (after giving effect to such repayment) the
sum, for each Bank, of the aggregate amount of all Revolving Credit Advances
owed to such Bank by such Borrower plus the aggregate amount of all Letter of
Credit Liabilities held by such Bank for all Letters of Credit issued at the
request of such Borrower does not exceed such Bank's Revolving Credit Commitment
for such Borrower at such date.

      (d) At the time of each payment pursuant to Section 2.5(b) or 2.5(c) by a
Borrower, such Borrower shall also pay accrued interest to the date of such
payment on the principal amount paid and amounts, if any, required to be paid
pursuant to Section 8.4(c) as a result of such payment. To the extent that any
amount would be required hereunder to be applied to Revolving Credit Advances
owed by any Borrower but for the fact that no Revolving Credit Advances to such
Borrower remain outstanding, such Borrower will cause such amount first, to be
paid on any outstanding unreimbursed drawings under Letters of Credit issued at
the request of such Borrower and, second to be deposited in the LC Cash
Collateral Account in respect of such Borrower.

      (e) All amounts received by the Collateral Agent pursuant to any Security
Document shall be applied first, to reimburse the Collateral Agent for all
costs, fees, expenses and other amounts to the

                                      -27-
<PAGE>

extent provided in such Security Document, second, to ratably pay the principal
of and interest of the Revolving Credit Advances and unpaid drawings under
Letters of Credit, third to ratably pay all other Obligations, and fourth to be
deposited in one or more LC Cash Collateral Accounts to the extent any Letters
of Credit are outstanding.

      SECTION 2.6. Increased Costs.

      (a) If any Bank or Issuing Bank determines that (i) the introduction of or
any change in or in the interpretation, application or applicability of any law
or regulation or (ii) the compliance with any guideline issued or request made
by any central bank or other governmental or monetary authority (whether or not
having the force of law), in each case introduced, changed, issued or made after
the date hereof (in the case of each Bank or Issuing Bank which is a party to
this Agreement on the date this Agreement becomes effective) or after the
effective date of the Transfer Agreement, Revolving Credit Commitment Increase
Agreement or Letter of Credit Commitment Increase Agreement pursuant to which a
Person becomes a Bank or an Issuing Bank (in the case of each other Bank or
Issuing Bank), affects or would affect the amount of capital required or
expected to be maintained by such Bank or Issuing Bank, as the case may be, or
any corporation controlling such Bank or Issuing Bank, as the case may be, and
that the amount of such capital is increased by or based upon the existence of
such Bank's or such Issuing Bank's, as the case may be, commitment to lend
hereunder, issue Letters of Credit or purchase participations in Letters of
Credit and other commitments of this type, then, upon demand by such Bank or
Issuing Bank, as the case may be (with a copy of such demand and related
certificate (which certificate shall specify in reasonable detail the nature of
such change in capital requirements, the proposed (or actual) compliance change
to be adopted by the applicable Bank or Issuing Bank and the calculations upon
which any compensation is claimed hereunder) to the Agent), the Borrowers shall
immediately pay to the Agent within five Business Days of receipt of such demand
for the account of such Bank or Issuing Bank, as the case may be, from time to
time as specified by such Bank or Issuing Bank, as the case may be, additional
amounts sufficient to compensate such Bank or Issuing Bank, as the case may be,
or such corporation in the light of such circumstances, to the extent that such
Bank or Issuing Bank, as the case may be, reasonably determines such increase in
capital to be allocable to the existence of such Bank's or such Issuing Bank's,
as the case may be, commitment to lend, issue Letters of Credit or purchase
participations in Letters of Credit hereunder. A certificate as to the amount of
such additional amounts, submitted to the Borrowers and the Agent by such Bank
or Issuing Bank, as the case may be, shall be prima facie evidence of the amount
of such additional amounts absent manifest error. No Bank or Issuing Bank shall
have any right to recover any additional amounts under this Section 2.6(a) for
any period more than 90 days prior to the date such Bank or Issuing Bank, as the
case may be, notifies the Borrowers of any such compliance.

      (b) If, due to either (i) the introduction of or any change (other than
any change by way of imposition or increase of reserve requirements included in
the Eurodollar Rate Reserve Percentage) in or in the interpretation, application
or applicability of any law or regulation or (ii) the compliance with any
guideline issued or request made by any central bank or other governmental or
monetary authority (whether or not having the force of law), in each case
introduced, changed, issued or made after the date hereof (in the case of each
Bank which is a party to this Agreement on the date this Agreement becomes
effective) or after the effective date of the Transfer Agreement or Revolving
Credit Commitment Increase Agreement pursuant to which a Person becomes a Bank
(in case of each other Bank), there shall be any increase in the cost to any
Bank of agreeing to make or making, funding or maintaining Eurodollar Rate
Advances to any Borrower, from that in effect at the date hereof or at the date
of such Transfer Agreement or Revolving Credit Commitment Increase Agreement, as
the case may be, then such Borrower shall from time to time, upon demand by such
Bank (with a copy of such demand to the Agent), pay to the Agent for the account
of such Bank additional amounts sufficient to compensate such Bank for such
increased cost. A certificate as to the amount of such increased cost, submitted
to such Borrower

                                      -28-
<PAGE>

and the Agent by such Bank, shall be prima facie evidence of the amount of such
increased cost absent manifest error. No Bank shall have the right to recover
any such increased costs for any period more than 90 days prior to the date such
Bank notifies such Borrower of any such introduction, change, compliance or
proposed compliance.

      (c) In the event that any Bank (other than a Bank that is also an Issuing
Bank) (i) makes a demand for payment under Section 2.8 or 2.17 or this Section
2.6, or (ii) does not agree to provide its consent or agree to any amendment or
waiver pursuant to Section 8.1 where such consent or agreement to provide an
amendment or waiver is required of all the Banks hereto, TWC may within 90 days
of such demand or non-consent, if no Default or Event of Default then exists,
replace such Bank with another commercial bank in accordance with all of the
provisions of the second and third sentences of Section 8.5(a), and clauses (b)
and (d) of Section 8.5 (including execution of an appropriate Transfer
Agreement); provided that (v) all obligations of such Bank to lend hereunder or
purchase participations in Letters of Credit shall be terminated and the Letter
of Credit Interests held by such Bank and Notes payable to such Bank and all
other obligations owed to such Bank hereunder shall be purchased in full without
recourse at par plus accrued interest and fees at or prior to such replacement,
(w) such replacement bank shall be an Eligible Assignee, (x) such replacement
bank shall, from and after such replacement, be deemed for all purposes to be a
"Bank" hereunder with a Revolving Credit Commitment for each Borrower and Letter
of Credit Liabilities in the amount of the Revolving Credit Commitment for such
Borrower and Letter of Credit Liabilities of such Bank in respect of such
Borrower immediately prior to such replacement (plus, if such replacement bank
is already a Bank prior to such replacement the respective Revolving Credit
Commitments for each Borrower for each Borrower and Letter of Credit Liabilities
of such Bank in respect of such Borrower prior to such replacement), as such
amount may be changed from time to time pursuant hereto, and shall have all of
the rights, duties and obligations hereunder of the Bank being replaced,
including obligations under Section 2.2, (y) such other actions shall be taken
by the Borrowers, such Bank and such replacement bank as may be appropriate to
effect the replacement of such Bank with such replacement bank on terms such
that such replacement bank has all of the rights, duties and obligations
hereunder as such Bank (including specification of the information contemplated
by Schedule I as to such replacement bank), and (z) no Bank or Issuing Bank
shall be required to increase any Commitment it may have or to replace such Bank
being replaced.

      (d) Before making any demand under this Section 2.6, each Bank agrees to
use reasonable efforts (consistent with its internal policy and legal and
regulatory restrictions) to designate a different Applicable Lending Office if
the making of such a designation would avoid the need for, or reduce the amount
of, such increased cost and would not, in the reasonable judgment of such Bank,
be otherwise disadvantageous to such Bank.

      SECTION 2.7. Payments and Computations.

      (a) Each Borrower shall make each payment hereunder to be made by it not
later than 11:00 a.m. (New York City time) on the day when due in Dollars to the
Agent at its address referred to in Section 8.2 (excluding, for such purpose,
any address to which copies are to be sent), in each case in same day funds,
without deduction, counterclaim or offset of any kind. The Agent will promptly
thereafter cause to be distributed to the Banks like funds relating to the
payment of principal, interest or any fees payable to the Banks for the account
of their respective Applicable Lending Offices, and like funds relating to the
payment of any other amount payable to any Bank or Issuing Bank to such Bank or
Issuing Bank, as the case may be, for the account of its Applicable Lending
Office, in each case to be applied in accordance with the terms of this
Agreement. The Agent will promptly pay to the Collateral Agent like funds
relating to the payment of any amount payable to the Collateral Agent. In no
event shall any Bank be entitled to share any fee paid to the Agent pursuant to
Section 2.11(a), any other fee paid to the Agent, as such, or any Fronting Fee,
other fee, cost or charge paid to an Issuing Bank pursuant to Section
2.11(b)(i).

                                      -29-
<PAGE>

      (b) (i) All computations of interest based on clause (a) of the definition
herein of "Base Rate" shall be made by the Agent on the basis of a year of 365
or 366 days, as the case may be, and (ii) all computations of Letter of Credit
Fees, Commitment Fees, Fronting Fees and all other fees and of interest based on
the Eurodollar Rate, the Federal Funds Rate and interest pursuant to Section
2.17 shall be made by the Agent on the basis of a year of 360 days, in each case
for the actual number of days (including the first day but excluding the last
day) occurring in the period for which such interest, Letter of Credit Fees,
Commitment Fees, Fronting Fees or other fees are payable. Each determination by
the Agent of an interest rate or fee hereunder shall be conclusive and binding
for all purposes, absent manifest error.

      (c) Whenever any payment hereunder shall be stated to be due on a day
other than a Business Day, such payment shall be made on the next succeeding
Business Day, and such extension of time shall in such case be included in the
computation of payment of interest, Commitment Fee, Letter of Credit Fee,
Fronting Fee or any other fee hereunder, as the case may be; provided, however,
that, if such extension would cause payment of interest on or principal of
Eurodollar Rate Revolving Credit Advances to be made in the next following
calendar month, such payment shall be made on the next preceding Business Day.

      (d) Unless the Agent shall have received notice from a Borrower prior to
the date on which any payment is due by such Borrower to any Bank hereunder that
such Borrower will not make such payment in full, the Agent may assume that such
Borrower has made such payment in full to the Agent on such date and the Agent
may, in reliance upon such assumption, cause to be distributed to each Bank on
such due date an amount equal to the amount then due such Bank hereunder. If and
to the extent such Borrower shall not have so made such payment in full to the
Agent, each Bank shall repay to the Agent forthwith on demand such amount
distributed to such Bank together with interest thereon, for each day from the
date such amount is distributed to such Bank until the date such Bank repays
such amount to the Agent, at the Federal Funds Rate.

      SECTION 2.8. Taxes.

      (a) Any and all payments by any Borrower hereunder shall be made, in
accordance with Section 2.7, free and clear of and without deduction for any and
all present or future taxes, levies, imposts, deductions, charges or
withholdings with respect thereto, and all liabilities with respect thereto,
excluding in the case of each Bank, each Issuing Bank and the Agent, (i) taxes
imposed on its net income or net profits, and franchise taxes imposed on it, by
the jurisdiction under the laws of which such Bank, such Issuing Bank or the
Agent (as the case may be) is organized or any political subdivision thereof and
(ii) taxes imposed as a result of a present or former connection between such
Bank, such Issuing Bank or the Agent, as the case may be, and the jurisdiction
imposing such tax or any political subdivision thereof (other than any such
connection arising solely from such Bank, such Issuing Bank or the Agent, as the
case may be, having executed or delivered, or performed its obligations or
received a payment under, or taken any other action related to any Credit
Document) and, in the case of each Bank, taxes imposed on its net income or net
profits, and franchise taxes imposed on it, by the jurisdiction of such Bank's
Applicable Lending Office or any political subdivision thereof (all such
non-excluded taxes, levies, imposts, deductions, charges, withholdings and
liabilities being hereinafter referred to as "Taxes"). If any Borrower shall be
required by law to deduct any Taxes from or in respect of any sum payable
hereunder or under any Note to any Bank, any Issuing Bank or the Agent, (i) the
sum payable shall be increased as may be necessary so that after making all
required deductions for Taxes (including deductions for Taxes applicable to
additional sums payable under this Section 2.8) such Bank, such Issuing Bank or
the Agent, as the case may be, receives an amount equal to the sum it would have
received had no such deductions for Taxes been made, (ii) such Borrower shall
make such deductions and (iii) such Borrower shall pay the full amount deducted
to the relevant taxation authority or other authority in accordance with
applicable law.

                                      -30-
<PAGE>

      (b) In addition, each Borrower agrees to pay all present or future filing
or recording fees, stamp or documentary taxes and all other excise or property
taxes, charges or similar levies which arise from any payment made by such
Borrower hereunder or from the execution, delivery, filing, recording or
registration of, or otherwise with respect to, any Credit Document (herein
referred to as "Other Taxes").

      (c) Each Borrower will indemnify each Bank, each Issuing Bank and the
Agent for the full amount of Taxes or Other Taxes (including any Taxes or Other
Taxes imposed by any jurisdiction on amounts payable under this Section 2.8)
owed and paid by such Bank, such Issuing Bank or the Agent, as the case may be,
and any liability (including penalties, interest and expenses) arising therefrom
or with respect thereto. This indemnification shall be made within 30 days from
the date such Bank, such Issuing Bank or the Agent, as the case may be, makes
written demand therefor; provided that such Borrower shall have no liability
pursuant to this clause (c) of this Section 2.8 to indemnify a Bank, an Issuing
Bank or the Agent for Taxes or Other Taxes which were paid by such Bank, such
Issuing Bank or the Agent, as the case may be, more than ninety days prior to
such written demand for indemnification.

      (d) In the event that a Bank, an Issuing Bank or the Agent receives a
written communication from any governmental authority with respect to an
assessment or proposed assessment of any Taxes, such Bank, such Issuing Bank or
Agent, as the case may be, shall promptly notify TWC in writing and provide TWC
with a copy of such communication. The Agent's, an Issuing Bank's or a Bank's
failure to provide a copy of such communication to TWC shall not relieve TWC of
any of its obligations hereunder.

      (e) Promptly following payment of Taxes by or at the direction of any
Borrower, such Borrower will furnish to the Agent, at its address referred to in
Section 8.2, the original or a certified copy of a receipt evidencing payment
thereof (or, if no such receipt is reasonably available, other evidence of
payment reasonably acceptable to the Agent). Should any Bank, any Issuing Bank
or the Agent ever receive any refund, credit or deduction from any taxing
authority to which such Bank, such Issuing Bank or the Agent, as the case may
be, would not be entitled but for the payment by such Borrower of Taxes or Other
Taxes as required by this Section 2.8 (it being understood that the decision as
to whether or not to claim, and if claimed, as to the amount of any such refund,
credit or deduction shall be made by such Bank, such Issuing Bank or the Agent,
as the case may be, in its reasonable judgment), such Bank, such Issuing Bank or
the Agent, as the case may be, thereupon shall repay to such Borrower an amount
with respect to such refund, credit or deduction equal to any net reduction in
taxes actually obtained by such Bank, such Issuing Bank or the Agent, as the
case may be, and determined by such Bank, such Issuing Bank or the Agent, as the
case may be, to be attributable to such refund, credit or deduction.

      (f) Each Bank organized under the laws of a jurisdiction outside the
United States shall on or prior to the date of its execution and delivery of
this Agreement in the case of each Bank which is a party to this Agreement on
the date this Agreement becomes effective and on the date the Transfer Agreement
or Revolving Credit Commitment Increase Agreement pursuant to which it becomes a
Bank is first effective in the case of each other Bank, and from time to time
thereafter as necessary or appropriate (but only so long thereafter as such Bank
remains lawfully able to do so), provide the Agent and each Borrower with two
original Internal Revenue Service Forms W-8BEN or W-8ECI (or, in the case of a
Bank that has provided a certificate to the Agent that it is not (i) a "bank" as
defined in Section 881(c)(3)(A) of the Code, (ii) a ten-percent shareholder
(within the meaning of Section 871(h)(3)(B) of the Code) of such Borrower or
(iii) a controlled foreign corporation related to such Borrower (within the
meaning of Section 864(d)(4) of the Code), Internal Revenue Service Form
W-8BEN), or any successor or other form prescribed by the Internal Revenue
Service, certifying that such Bank is exempt from or entitled to a reduced rate
of United States withholding tax on payments pursuant to this Agreement or any
other Credit Document or, in the case of a Bank that has certified that it is
not a "bank" as described above, certifying that such Bank is a foreign
corporation. If the forms provided by a Bank at the time such Bank first becomes
a party to this Agreement indicate a United States interest withholding tax rate
in

                                      -31-
<PAGE>

excess of zero, withholding tax at such rate shall be considered excluded from
Taxes unless and until such Bank provides the appropriate forms certifying that
a lesser rate applies, whereupon withholding tax at such lesser rate only shall
be considered excluded from Taxes for periods governed by such forms.

      (g) For any period with respect to which a Bank has failed to provide any
Borrower with the appropriate form, certificate or other document required by
subsection (f) of this Section 2.8 (other than if such failure is due to a
change in the applicable law, or in the interpretation or application thereof,
occurring after the date on which a form, certificate or other document
originally was required to be provided) such Bank shall not be entitled to
indemnification under subsection (a) or (c) of this Section 2.8 with respect to
Taxes imposed by the United States by reason of such failure; provided, however,
that should a Bank become subject to Taxes because of its failure to deliver a
form, certificate or other document required hereunder, the Borrowers shall take
such steps as such Bank shall reasonably request (at such Bank's expense) to
assist such Bank in recovering such Taxes.

      (h) Any Bank claiming any additional amounts payable pursuant to this
Section 2.8 agrees to use reasonable efforts to change the jurisdiction of its
Applicable Lending Office if the making of such a change would avoid the need
for, or reduce the amount of, any such additional amounts that may thereafter
accrue and would not, in the reasonable judgment of such Bank, be otherwise
materially disadvantageous to such Bank.

      (i) If a Borrower determines in good faith that a reasonable basis exists
for contesting a Tax, the relevant Bank, or the Agent, as applicable, shall
provide reasonable cooperation to such Borrower in challenging such Tax at such
Borrower's expense and if requested by such Borrower in writing; provided,
however, that no Bank shall be required to take any action hereunder which, in
the reasonable discretion of such Bank, would cause such Bank or its Applicable
Lending Office to suffer a legal, regulatory or material economic disadvantage.

      (j) Without prejudice to the survival of any other agreement of the
Borrowers hereunder, the agreements and obligations of the Borrowers contained
in this Section 2.8 shall survive the payment in full of principal and interest
hereunder and the Termination Date.

      (k) Notwithstanding any provision of this Agreement or the Notes to the
contrary, this Section 2.8 shall be the sole provision governing indemnities for
and claims for Taxes under this Agreement.

      (l) Notwithstanding any other provision in this Section 2.8, no additional
amount shall be required to be paid by any Borrower under Section 2.8(a) or
2.8(c) to any Bank organized under the laws of a jurisdiction outside the United
States in respect of Taxes or any liabilities (including penalties, interest and
expenses arising therefrom or with respect thereto), except to the extent that
any change after the date hereof (in the case of each Bank which is a party to
this Agreement on the date this Agreement becomes effective) or after the
effective date of the Transfer Agreement or Revolving Credit Commitment Increase
Agreement pursuant to which a Person becomes a Bank (in case of each other Bank)
in any such requirement for a deduction, withholding or payment of Taxes
described in this Section 2.8 shall result in an increase in the rate of such
deduction, withholding or payment from that in effect at the date hereof (in the
case of each Bank which is a party to this Agreement on the date of this
Agreement) or at the date of such Transfer Agreement or Revolving Credit
Commitment Increase Agreement, as the case may be (in the case of each other
Bank). For avoidance of doubt, this Section 2.8(l) does not apply to Other
Taxes.

      SECTION 2.9. Sharing of Payments, Etc. If any Bank shall obtain any
payment (whether voluntary or involuntary, or through the exercise of any right
of set-off or otherwise) on account of the Revolving Credit Advances owed to it
or its Letter of Credit Interest (other than pursuant to Section 2.6, 2.8, 2.17,
8.4(b) or 8.4(c)) in excess of its ratable share of payments on account of all
Revolving Credit

                                      -32-
<PAGE>

Advances and Letter of Credit Interests obtained by all the Banks, such Bank
shall forthwith purchase from the other Banks such participations in the
Revolving Credit Advances and Letter of Credit Interests of such other Banks as
shall be necessary to cause such purchasing Bank to share the excess payment
ratably with each of them; provided that if all or any portion of such excess
payment is thereafter recovered from such purchasing Bank, such purchase from
each Bank shall be rescinded and such Bank shall repay to the purchasing Bank
the purchase price to the extent of such Bank's ratable share (according to the
proportion of (i) the amount of the participation purchased from such Bank as a
result of such excess payment to (ii) the total amount of such excess payment)
of such recovery together with an amount equal to such Bank's ratable share
(according to the proportion of (i) the amount of such Bank's required repayment
to (ii) the total amount so recovered from the purchasing Bank) of any interest
or other amount paid or payable by the purchasing Bank in respect of the total
amount so recovered. Each Borrower agrees that any Bank so purchasing a
participation from another Bank pursuant to this Section 2.9 may, to the fullest
extent permitted by law, exercise all its rights of payment (including the right
of set-off) with respect to such participation as fully as if such Bank were the
direct creditor of such Borrower in the amount of such participation. For
avoidance of doubt, in no event shall the Borrowers be liable for duplicative
payments under this Section 2.9 in respect of any Obligations.

      SECTION 2.10. Evidence of Debt. (a) Each Bank and Issuing Bank shall
maintain in accordance with its usual practice an account or accounts evidencing
the indebtedness of each Borrower to such Bank or Issuing Bank resulting from
each Revolving Credit Advance or Letter of Credit Interest owing to such Bank or
Issuing Bank, as the case may be, from time to time, including the amounts of
principal and interest payable and paid to such Bank or Issuing Bank from time
to time hereunder. Each Borrower agrees that upon notice by any Bank to such
Borrower (with a copy of such notice to the Agent) to the effect that a
promissory note or other evidence of indebtedness is required or appropriate in
order for such Bank to evidence (whether for purposes of pledge, enforcement or
otherwise) the Revolving Credit Advances to such Borrower owing to, or to be
made by, such Bank, such Borrower shall promptly execute and deliver to such
Bank, with a copy to the Agent, a Note in substantially the form of Exhibit I
hereto payable to the order of such Bank. All references to Notes in the Credit
Documents shall mean Notes, if any, to the extent issued hereunder.

      (b) The Register maintained by the Agent pursuant to Section 8.5(c) shall
set forth (i) the date and amount of each Letter of Credit and Revolving Credit
Borrowing made hereunder, the Type of Revolving Credit Advances comprising such
Revolving Credit Borrowing and, if appropriate, the Interest Period applicable
thereto, (ii) the terms of each Transfer Agreement, Revolving Credit Commitment
Increase Agreement and Letter of Credit Commitment Increase Agreement delivered
to and accepted by it, (iii) the amount of any principal or interest due and
payable or to become due and payable from each Borrower to each Bank hereunder,
and (iv) the amount of any sum received by the Agent from any Borrower hereunder
and each Bank's share thereof.

      (c) Entries made in good faith by the Agent in the Register pursuant to
subsection (b) above, and by each Bank or Issuing Bank in its account or
accounts pursuant to subsection (a) above, shall be prima facie evidence of the
amount of principal and interest due and payable or to become due and payable
from any Borrower to, in the case of the Register, the Agent and, in the case of
such account or accounts, such Bank or Issuing Bank, under this Agreement,
absent manifest error; provided, however that the failure of the Agent or such
Bank or Issuing Bank to make an entry, or any finding that an entry is
incorrect, in the Register or such account or accounts shall not limit or
otherwise affect the obligations of any Credit Party under any Credit Document.

      SECTION 2.11. Fees.

                                      -33-
<PAGE>

      (a) Agent's and Collateral Agent's Fees. TWC agrees to pay to the Agent
and the Collateral Agent, for their respective sole account, such fees as may be
separately agreed to in writing by TWC and the Agent and the Collateral Agent.

      (b) Letter of Credit Fees.

                  (i)   Fronting Fee and Other Fees and Charges of Issuing
      Banks. Each Borrower agrees to pay to the Agent for the account of each
      Issuing Bank a fronting fee (a "Fronting Fee") based on the Available
      Amount of each Letter of Credit issued at the request of such Borrower
      (for the stated duration thereof) issued by such Issuing Bank in an amount
      equal to 0.15% per annum. All Fronting Fees payable pursuant to this
      Section 2.11(b)(i) shall be payable in arrears on the last Business Day of
      each Fiscal Quarter, on the Termination Date and on demand from time to
      time during the continuance of an Event of Default. In addition, each
      Borrower shall pay directly to each Issuing Bank for its own account the
      customary issuance, presentation, amendment and other processing fees, and
      other standard costs and charges, of such Issuing Bank relating to Letters
      of Credit issued at the request of such Borrower as from time to time in
      effect. Such customary fees and standard costs and charges are due and
      payable on demand and are nonrefundable.

                  (ii)  Participating Banks. Each Borrower agrees to pay to the
      Agent for the account of each Bank a letter of credit fee (a "Letter of
      Credit Fee") based on such Bank's LC Participation Percentage of the
      average daily aggregate Available Amount of all Letters of Credit issued
      at the request of such Borrower outstanding from time to time at a rate
      per annum equal from time to time to the Applicable Margin for Eurodollar
      Rate Advances for such Borrower in effect from time to time (for the
      stated duration thereof). All amounts payable pursuant to this Section
      2.11(b)(ii) shall be paid in arrears on the last Business Day of each
      Fiscal Quarter, on the Termination Date and on demand from time to time
      during the continuance of an Event of Default.

      (c) Commitment Fees. TWC agrees to pay to the Agent for the account of
each Bank a commitment fee (a "Commitment Fee"), in an amount equal to the
Applicable Commitment Fee Rate in effect from time to time multiplied by the
average daily amount of such Bank's Unused Revolving Credit Commitment for TWC
(for purposes of computing Commitment Fees only, Revolving Credit Advances made
to any Borrower shall be considered to have been made to TWC and Letters of
Credit issued at the request of any Borrower shall be considered to have been
issued at the request of TWC, and accordingly, for purposes of computing
Commitment Fees only, both shall be considered to be usage of such Revolving
Credit Commitment for TWC). All amounts payable pursuant to this Section 2.11(c)
shall be paid in arrears on the last Business Day of each Fiscal Quarter and on
the Termination Date.

      SECTION 2.12. Repayment of Revolving Credit Advances. Each Borrower shall
repay to the Agent for the ratable account of the Banks on the date set forth in
clause (i) of the definition herein of Termination Date, or such earlier date as
may be applicable pursuant to Article VI, the aggregate principal amount of the
Revolving Credit Advances made to such Borrower then outstanding.

      SECTION 2.13. Interest.

      (a) Scheduled Interest. Each Borrower shall pay interest on the unpaid
principal amount of each Revolving Credit Advance made to such Borrower from the
date of such Revolving Credit Advance until such principal amount shall be paid
in full, at the following rates per annum:

                                      -34-
<PAGE>

                  (i)   Base Rate Advances. During such periods as such
      Revolving Credit Advance is a Base Rate Advance, a rate per annum equal at
      all times to the sum of (x) the Base Rate in effect from time to time plus
      (y) the Applicable Margin in effect from time to time for such Borrower as
      to Base Rate Advances, payable in arrears quarterly on the last Business
      Day of each Fiscal Quarter during such periods and on the date such Base
      Rate Advance shall be Converted or paid in full.

                  (ii)  Eurodollar Rate Advances. During such periods as such
      Revolving Credit Advance is a Eurodollar Rate Advance, a rate per annum
      equal at all times during each Interest Period for such Revolving Credit
      Advance to the sum of (x) the Eurodollar Rate for such Interest Period for
      such Revolving Credit Advance plus (y) the Applicable Margin in effect
      from time to time for such Borrower as to Eurodollar Rate Advances,
      payable in arrears on the last day of such Interest Period and, if such
      Interest Period has a duration of more than three months, on each day that
      occurs during such Interest Period every three months from the first day
      of such Interest Period and on the date such Eurodollar Rate Advance shall
      be Converted or paid in full.

      (b) Default Interest. Upon the occurrence and during the continuance of an
Event of Default, each Borrower shall pay interest on (i) the past due principal
amount (if any) of (x) each Revolving Credit Advance owing to each Bank by such
Borrower, payable in arrears on demand and (y) each past due Reimbursement
Obligation (if any) owing by such Borrower, payable in arrears on demand, at a
rate per annum equal to 2% per annum above the rate per annum required to be
paid on such Revolving Credit Advance pursuant to Section 2.13(a) or such rate
per annum required to be paid on such Reimbursement Obligation pursuant to
Section 2.2(c) and (ii) to the fullest extent permitted by law, the amount of
any interest, Fronting Fee, Commitment Fee, Letter of Credit Fee or any other
fee or other amount payable hereunder that is not paid when due (giving effect
to any grace period), from the date such amount shall be due until such amount
shall be paid in full, payable in arrears on the date such amount shall be paid
in full and on demand, at a rate per annum equal at all times to 2% per annum
above the rate per annum required to be paid on Base Rate Advances owed by such
Borrower pursuant to Section 2.13(a)(i).

      SECTION 2.14. Interest Rate Determination.

      (a) The Agent shall give prompt notice to the Borrowers and the Banks of
the applicable interest rate determined by the Agent for purposes of Section
2.13(a)(i) or 2.13(a)(ii).

      (b) If, with respect to any Eurodollar Rate Advances, the Majority Banks
notify the Agent that either (1) the Eurodollar Rate for any Interest Period for
such Eurodollar Rate Advances will not adequately reflect the cost to such
Majority Banks of making, funding or maintaining their respective Eurodollar
Rate Advances for such Interest Period, or (2) Dollar deposits for the relevant
amounts and Interest Period for their respective Eurodollar Rate Advances are
not available to them in the London interbank market, the Agent shall forthwith
so notify the Borrowers and the Banks, whereupon (i) each Eurodollar Rate
Advance will automatically, on the last day of the then existing Interest Period
therefor, Convert into a Base Rate Advance, and (ii) the obligation of the Banks
to make, or to Convert Revolving Credit Advances into, Eurodollar Rate Advances
shall be suspended until the Agent shall notify the Borrowers and the Banks that
the circumstances causing such suspension no longer exist.

      (c) If a Borrower shall fail to select the duration of any Interest Period
for any Eurodollar Rate Advances in accordance with the provisions contained in
the definition of "Interest Period" in Section 1.01, the Agent will forthwith so
notify such Borrower and the Banks and such Revolving Credit Advances will
automatically, on the last day of the then existing Interest Period therefor,
Convert into Base Rate Advances.

                                      -35-
<PAGE>

      (d) On the date on which the aggregate unpaid principal amount of
Eurodollar Rate Advances comprising any Revolving Credit Borrowing shall be
reduced, by payment or prepayment or otherwise, to less than $5,000,000, such
Revolving Credit Advances shall automatically Convert into Base Rate Advances
and the applicable Borrower shall pay any amounts required to be paid pursuant
Section 8.4(c) as a result of such Conversion.

      (e) If any Event of Default exists as to any Borrower, (i) each Eurodollar
Rate Advance made to such Borrower will automatically, on the last day of the
then existing Interest Period therefor, Convert into a Base Rate Advance and
(ii) the obligation of the Banks to make Eurodollar Rate Advances to such
Borrower, and to Convert Advances made to such Borrower into Eurodollar Rate
Advances, shall be suspended.

      SECTION 2.15. Optional Conversion of Revolving Credit Advances. Any
Borrower may on any Business Day, upon notice given to the Agent not later than
11:00 a.m. (New York City time) on the third Business Day prior to the date of
the proposed Conversion and subject to the provisions of Sections 2.14 and 2.16,
Convert all Revolving Credit Advances of one Type comprising the same Revolving
Credit Borrowing made to such Borrower into Revolving Credit Advances of the
other Type; provided, however, that any Conversion of Eurodollar Rate Advances
into Base Rate Advances shall be made only on the last day of an Interest Period
for such Eurodollar Rate Advances and any Conversion of Base Rate Advances into
Eurodollar Rate Advances shall be in an amount of $5,000,000 or an integral
multiple of $1,000,000 in excess thereof. Each such notice of a Conversion
shall, within the restrictions specified above, specify (a) the date of such
Conversion, (b) the Revolving Credit Advances to be Converted and (c) if such
Conversion is into Eurodollar Rate Advances, the duration of the initial
Interest Period for each such Revolving Credit Advance. Each notice of
Conversion shall be irrevocable and binding on such Borrower.

      SECTION 2.16. Illegality. Notwithstanding any other provision of this
Agreement, if any Bank shall notify the Agent that the introduction of or any
change in or in the interpretation of any law or regulation makes it unlawful,
or any central bank or other governmental authority having relevant jurisdiction
asserts that it is unlawful, for any Bank or its Eurodollar Lending Office to
perform its obligations hereunder to make Eurodollar Rate Advances or to fund or
maintain Eurodollar Rate Advances hereunder, (a) each Eurodollar Rate Advance
will automatically, upon such demand, Convert into a Base Rate Advance and (b)
the obligation of the Banks to make Eurodollar Rate Advances or to Convert
Revolving Credit Advances into Eurodollar Rate Advances shall be suspended until
the Agent shall notify the Borrowers and the Banks that the circumstances
causing such suspension no longer exist.

      SECTION 2.17. Additional Interest on Eurodollar Rate Advances. Each
Borrower shall pay to each Bank, so long as such Bank shall be required under
regulations of the Federal Reserve Board to maintain reserves with respect to
liabilities or assets consisting of or including Eurocurrency Liabilities,
additional interest on the unpaid principal amount of each Eurodollar Rate
Advance of such Bank to such Borrower, from the date of such Revolving Credit
Advance until such principal amount is paid in full, at an interest rate per
annum equal at all times to the remainder obtained by subtracting (a) the
Eurodollar Rate for the Interest Period for such Revolving Credit Advance from
(b) the rate obtained by dividing such Eurodollar Rate by a percentage equal to
100% minus the Eurodollar Rate Reserve Percentage of such Bank for such Interest
Period, payable on each date on which interest is payable on such Revolving
Credit Advance. Such additional interest shall be determined by such Bank and
notified to such Borrower through the Agent. A certificate as to the amount of
such additional interest submitted to such Borrower and the Agent by such Bank
shall be conclusive and binding for all purposes, absent manifest error. No Bank
shall have the right to recover any additional interest pursuant to this Section
2.17 for any period more than 90 days prior to the date such Bank notifies such
Borrower that additional interest may be charged pursuant to this Section 2.17.

                                      -36-
<PAGE>

      SECTION 2.18. Nature of Obligations. Notwithstanding anything in this
Agreement to the contrary, the respective obligations of the Borrowers under the
Credit Documents are several and not joint. For avoidance of doubt, it is agreed
that no Borrower shall be liable for the Revolving Credit Advances (or interest
or fees with respect thereto) made to a different Borrower under Section 2.1(a),
and no Borrower shall be liable for the Reimbursement Obligations (or related
fees) with respect to Letters of Credit issued at the request of a different
Borrower pursuant to Section 2.1(b).

      SECTION 2.19. Facility Increases. (a) Subject to the terms and conditions
set forth herein, TWC shall have the right, without the consent of the Banks but
with the prior approval of the Agent and the Issuing Banks (not to be
unreasonably withheld), to cause from time to time an increase in the Revolving
Credit Commitments of the Banks for TWC (a "Revolving Credit Facility Increase")
by adding to this Agreement one or more additional financial institutions that
are not already Banks and that are approved by the Agent and the Issuing Banks
(not to be unreasonably withheld) (each a "New Revolving Bank") or by allowing
one or more existing Banks to increase their respective Revolving Credit
Commitments for TWC or both; provided, that (i) a Revolving Credit Facility
Increase shall be permitted only if (1) no Default or Event of Default shall
have occurred and be continuing at the time the related Revolving Credit
Facility Increase Notice is given and no Default or Event of Default shall have
occurred and be continuing at the time such Revolving Credit Facility Increase
becomes effective, (2) the aggregate amount of all Revolving Credit Facility
Increases shall not exceed $500,000,000, and (3) the amount of such Revolving
Credit Facility Increase is at least $25,000,000 (or the remaining amount of
such $500,000,000 not subject to prior Revolving Credit Facility Increases),
(ii) no Revolving Credit Commitment of any Bank shall be increased without such
Bank's prior written consent, and (iii) if, on the effective date of any
Revolving Credit Facility Increase, any Revolving Credit Advance is outstanding,
then TWC shall be obligated to pay any loss, cost or expense contemplated by
Section 8.4(c) in connection with any assignment pursuant to a Transfer
Agreement referred to in Section 2.19(c) and the fees referred to in clause (iv)
of Section 8.5(a) in connection with the Transfer Agreements referred to in
Section 2.19(c).

      (b) Any Revolving Credit Facility Increase shall be requested by written
notice from TWC to the Agent (a "Revolving Credit Facility Increase Notice") in
the form of Exhibit J. Each such Revolving Credit Facility Increase Notice shall
specify (i) the proposed effective date of such Revolving Credit Facility
Increase, which date shall be a Business Day and shall be no earlier than 5
Business Days after receipt by the Agent of such Revolving Credit Facility
Increase Notice, (ii) the amount of any requested Revolving Credit Facility
Increase, (iii) the identity of each New Revolving Bank and each Bank, if any,
that has agreed in writing to increase its Revolving Credit Commitment for TWC,
and (iv) the amount of the respective Revolving Credit Commitments for TWC of
the then existing Banks and the New Revolving Banks from and after the Revolving
Credit Facility Increase Effective Date. If (A) the Agent and the Issuing Banks
consent to such Revolving Credit Facility Increase (such consent not to be
unreasonably withheld), (B) TWC, the Agent, the Issuing Banks and each Bank that
has agreed in writing to increase its Revolving Credit Commitment to TWC execute
a Revolving Credit Commitment Increase Agreement in substantially the form of
Exhibit L-2 and TWC, the Agent, the Issuing Banks and each New Revolving Bank
execute a Revolving Credit Commitment Increase Agreement in substantially the
form of Exhibit L-1, and (C) the Agent has received the Transfer Agreements
contemplated by Section 2.19(c), then the Agent and the Issuing Banks shall
execute a counterpart of the Revolving Credit Facility Increase Notice and such
Revolving Credit Facility Increase shall be effective on the proposed effective
date set forth in the Revolving Credit Facility Increase Notice (if the Agent
and the Issuing Banks consented to such Revolving Credit Facility Increase prior
to such proposed date) or on another date agreed to by the Agent, the Issuing
Banks and TWC (such date referred to as the "Revolving Credit Facility Increase
Effective Date").

                                      -37-
<PAGE>

      (c) At least three Business Days before each Revolving Credit Facility
Increase Effective Date relating to any Revolving Credit Facility Increase, if
the Agent and the Issuing Banks have consented to such Revolving Credit Facility
Increase, the Banks, the New Revolving Banks, the Issuing Banks and TWC shall
enter into and deliver to the Agent appropriate Transfer Agreements, effective
on such Revolving Credit Facility Increase Effective Date, in amounts such that
after giving effect to such Revolving Credit Facility Increase and such Transfer
Agreements, each Bank (including the New Revolving Banks and each Bank that has
agreed to increase its Revolving Credit Commitment to TWC as a part of such
Revolving Credit Facility Increase) hold Revolving Credit Advances of each of
the Borrowers ratably according to their respective Revolving Credit Commitments
for TWC.

      (d) Each Revolving Credit Facility Increase shall become effective on the
related Revolving Credit Facility Increase Effective Date and upon such
effectiveness (i) the Agent shall record in the Register each New Revolving
Bank's information as provided in the Revolving Credit Facility Increase Notice
and pursuant to an administrative questionnaire satisfactory to the Agent that
shall be executed and delivered by each New Revolving Bank to the Agent on or
before the Revolving Credit Facility Increase Effective Date, (ii) part A of
Schedule III shall be amended and restated to set forth all Banks (including any
New Revolving Banks) that will be Banks hereunder after giving effect to such
Revolving Credit Facility Increase (which shall be attached to the applicable
Revolving Credit Facility Increase Notice and the Agent shall distribute to each
Bank a copy of such amended and restated part A of Schedule III), and (iii) each
New Revolving Bank identified on the Revolving Credit Facility Increase Notice
for such Revolving Credit Facility Increase shall be a "Bank" for all purposes
under this Agreement.

      (e) Subject to the terms and conditions set forth herein, TWC shall have
the right, without the consent of the Banks but with the prior approval of the
Agent (not to be unreasonably withheld), to cause from time to time an increase
in the Letter of Credit Commitments (a "Letter of Credit Facility Increase") by
adding to this Agreement, as Issuing Banks, one or more additional financial
institutions (including any existing Bank) that are not already Issuing Banks
and that are approved by the Agent (not to be unreasonably withheld) (each a
"New Letter of Credit Issuing Bank") or by allowing one or more existing Issuing
Banks to increase their respective Letter of Credit Commitments or both;
provided, that (i) a Letter of Credit Facility Increase shall be permitted only
if (1) no Default or Event of Default shall have occurred and be continuing at
the time the related Letter of Credit Facility Increase Notice is given and no
Default or Event of Default shall have occurred and be continuing at the time
such Letter of Credit Facility Increase becomes effective, (2) the aggregate
amount of all Letter of Credit Facility Increases shall not exceed $500,000,000,
(3) the amount of such Letter of Credit Facility Increase is at least
$25,000,000 (or the remaining amount of such $500,000,000 not subject to prior
Letter of Credit Facility Increases), and (4) a Revolving Credit Facility
Increase becomes effective on the same date that such Letter of Credit Facility
Increase becomes effective and in the same amount, or a greater amount, as such
Letter of Credit Facility Increase, (ii) no Issuing Bank's Letter of Credit
Commitment shall be increased without such Issuing Bank's prior written consent,
and (iii) no Bank shall be required to become an Issuing Bank.

      (f) Any Letter of Credit Facility Increase shall be requested by written
notice from TWC to the Agent (a "Letter of Credit Facility Increase Notice") in
the form of Exhibit K. Each such Letter of Credit Facility Increase Notice shall
specify (i) the proposed effective date of such Letter of Credit Facility
Increase, which date shall be a Business Day and shall be no earlier than 5
Business Days after receipt by the Agent of such Letter of Credit Facility
Increase Notice, (ii) the amount of any requested Letter of Credit Facility
Increase, (iii) the identity of each New Letter of Credit Issuing Bank and each
Issuing Bank, if any, that has agreed in writing to increase its Letter of
Credit Commitment, and (iv) the amount of the respective Letter of Credit
Commitments of the then existing Issuing Banks and the New Letter of Credit
Issuing Banks from and after the Letter of Credit Facility Increase Effective
Date. If the Agent consents to such Letter of Credit Facility Increase (such
consent not to be unreasonably withheld), and if

                                      -38-
<PAGE>

TWC, the Agent and each Issuing Bank that has agreed in writing to increase its
Letter of Credit Commitment execute a Letter of Credit Commitment Increase
Agreement in substantially the form of Exhibit L-4 and TWC, the Agent and each
New Letter of Credit Issuing Bank execute a Letter of Credit Commitment Increase
Agreement in substantially the form of Exhibit L-3, then the Agent shall execute
a counterpart of the Letter of Credit Facility Increase Notice, and such Letter
of Credit Facility Increase shall be effective on the proposed effective date
set forth in the Letter of Credit Facility Increase Notice (if the Agent
consented to such Letter of Credit Facility Increase prior to such proposed
date) or on another date agreed to by the Agent and TWC (such date referred to
as the "Letter of Credit Facility Increase Effective Date").

      (g) Each Letter of Credit Facility Increase shall become effective on the
related Letter of Credit Facility Increase Effective Date and upon such
effectiveness (i) the Agent shall record in the Register each New Letter of
Credit Issuing Bank's information as provided in the Letter of Credit Facility
Increase Notice and pursuant to an administrative questionnaire satisfactory to
the Agent that shall be executed and delivered by each New Letter of Credit
Issuing Bank to the Agent on or before the Letter of Credit Facility Increase
Effective Date, (ii) part B of Schedule III shall be amended and restated to set
forth all Persons (including any New Letter of Credit Issuing Banks) that will
be Issuing Banks hereunder after giving effect to such Letter of Credit Facility
Increase (which shall be attached to the applicable Letter of Credit Facility
Increase Notice and the Agent shall distribute to each Bank and each Issuing
Bank a copy of such amended and restated part B of Schedule III), and (iii) each
New Letter of Credit Issuing Bank identified on the Letter of Credit Facility
Increase Notice for such Letter of Credit Facility Increase shall be a "Issuing
Bank" for all purposes under this Agreement.

                                  ARTICLE III

                                   CONDITIONS

      SECTION 3.1. Conditions Precedent to Effectiveness of Agreement. Article
II shall become effective on and as of the date the Agent shall give the notice
contemplated by Section 3.3 (the "Effective Date"), and upon such date the
Effective Date shall be deemed to have occurred. Such notice will be given on
the first date on which the Agent shall have received counterparts of this
Agreement (or signature pages hereof) duly executed by the Borrowers, the
Issuing Banks and all of the Banks and the Agent reasonably believes that the
following additional conditions precedent have been satisfied in all material
respects (all in form and substance satisfactory to the Agent):

      (a) The Agent shall have received the executed Notes, to the extent
requested by a Bank, an executed copy of the Pipeline Holdco Guaranty, the
Western Midstream Guaranty, the Pledge, the Western Midstream Security Agreement
and the letter referred to in clause (v) of the definition herein of EBITDA.

      (b) The Agent shall have received certified copies of (1) the resolutions
of the Board of Directors, or the Finance Committee thereof, (i) of each
Borrower authorizing the execution of this Agreement, the Notes and each Notice
of Letter of Credit and Notice of Revolving Credit Borrowing, and any other
Credit Documents to which such Borrower is a party, and (ii) of each other
Credit Party authorizing the execution of each Credit Document to which such
Credit Party is a party, and (2) all other documents, in each case evidencing
any necessary company action and governmental and other third

                                      -39-
<PAGE>

party approvals and consents, if any, with respect to each such Credit Document
and the transactions thereunder and hereunder.

      (c) The Agent shall have received a certificate of the Secretary or an
Assistant Secretary of each Credit Party certifying the names and true
signatures of the officers of such Credit Party authorized to sign each Credit
Document to which it is a party and the other documents to be delivered by it
hereunder and thereunder.

      (d) The Agent shall have received a copy of a certificate of the Secretary
of State of the jurisdiction of formation of, or of an Authorized Officer of,
each Credit Party, dated reasonably near the Effective Date, certifying (i) as
to a true and correct copy of the charter or other organizational documents of
such Credit Party, and each amendment thereto on file in such Secretary's office
and (ii) that (x) such amendments are the only amendments to such Credit Party's
charter or other organizational documents on file in such Secretary's office,
(y) such Credit Party has paid all franchise taxes to the date of such
certificate and (z) such Credit Party is duly incorporated or formed and in good
standing or presently subsisting under the laws of the State of the jurisdiction
of its incorporation or formation.

      (e) The Agent shall have received a copy of a certificate of the Secretary
of State of each State where any Western Midstream Assets are located, dated
reasonably near the Effective Date, certifying that the Western Midstream
Subsidiary that owns such Western Midstream Assets is duly qualified and in good
standing as a foreign entity in such State and has filed all annual reports
required to be filed to the date of such certificate.

      (f) The Agent shall have received opinions of each of (i) James J. Bender,
Esq., General Counsel of TWC, substantially in the form of Exhibit A and (ii)
Gibson, Dunn & Crutcher, counsel to the Borrowers, substantially in the form of
Exhibit B, and, in each case, as to such other matters as any Bank through the
Agent may reasonably request.

      (g) The Agent shall have received a certificate of each Credit Party,
signed on behalf of such Credit Party by an Authorized Officer thereof, dated as
of the Effective Date (the statements made in which certificate shall be true on
and as of the Effective Date), certifying as to (i) the absence of any
amendments to the charter or other organizational documents of such Credit Party
since the date of the Secretary of State's certificate referred to in clause (e)
above, (ii) a true and correct copy of the bylaws of such Credit Party as in
effect on the date on which the resolutions referred to in clause (c) were
adopted and on the Effective Date, (iii) the due incorporation or formation and
good standing and valid existence of such Credit Party as an entity organized
under the laws of the jurisdiction of its incorporation or organization, (iv)
the truth, in all material respects, of the representations and warranties
contained in this Agreement and the Credit Documents delivered on or before the
Effective Date as though made on and as of the Effective Date other than any
such representations or warranties that, by their terms, refer to a specific
date other than the Effective Date, in which case as of such specific date and
(v) the absence of any event occurring and continuing, or resulting from, the
consummation of the transactions hereunder or pursuant to the Credit Documents
delivered on or before the Effective Date, that constitutes a Default or an
Event of Default.

      (h) TWC shall have paid in full all accrued fees of the Agent, the
Syndication Agent, the Joint Lead Arrangers and the Banks to the extent required
to be paid hereunder and presented for payment.

      (i) The Agent shall have received evidence that the Existing Credit
Documentation shall have been terminated including release of all Liens
thereunder. Each Bank or Issuing Bank that is a party to the Existing Agreement
waives each notice of termination of the "Unused Revolving Credit Commitments"
(as therein defined) and the "Letter of Credit Commitments" (as therein
defined).

                                      -40-
<PAGE>

      (j) The Agent shall have received

                  (i)   executed originals of the WFSC Mortgage, the WGPC
      Mortgage and the WGPWC Mortgage covering the real property interests
      previously encumbered by the instruments described on Schedule XIV, except
      to the extent noted on Schedule XIV ("Initial Mortgages") and copies of
      proper financing statements, all such documents in form for filing in each
      jurisdiction that the Agent may deem necessary or desirable in order to
      create Acceptable Security Interests in the Collateral created under the
      Security Agreements and Initial Mortgages,

                  (ii)  delivery of all Equity Interests of the Western
      Midstream Subsidiaries in certificated form (and for each such
      certificated Equity Interest, a duly executed but blank stock power in the
      form of Schedule III to the Pledge),

                  (iii) completed requests for information, dated on or before
      the Effective Date listing all effective financing statements filed in the
      jurisdictions referred to in clause (i) above that name any Western
      Midstream Subsidiary or WFSGI as debtor, together with copies of such
      financing statements,

                  (iv)  evidence that all other action that the Agent may deem
      necessary or desirable in order to perfect and protect the first priority
      Liens created under the Security Documents has been taken (including
      receipt of duly executed UCC-3 termination statements),

                  (v)   a certificate of an Authorized Officer of TWC certifying
      that the insurance maintained by TWC and its Subsidiaries meets the
      requirements set forth in Section 5.1(c) (including evidence that the
      Collateral Agent is named as an additional insured thereunder in respect
      of the Collateral),

                  (vi)  favorable opinions of special counsel for Colorado, New
      Mexico and Wyoming, and

                  (vii) copies of all material governmental and third party
      consents and approvals necessary in connection with the transactions
      contemplated by the Credit Documents.

                  (viii) for each Western Midstream Subsidiary, a Perfection
      Certificate in the form of Exhibit M.

      SECTION 3.2. Conditions Precedent to a Revolving Credit Advance and an
Issuance of a Letter of Credit. The obligation of each Bank to make a Revolving
Credit Advance to, and each Issuing Bank to issue or increase the amount of a
Letter of Credit at the request of, any Borrower shall be subject to the
conditions precedent that (i) the Agent shall have received a Notice of
Revolving Credit Borrowing in the form of Exhibit D-2 hereto for the Revolving
Credit Borrowing of which such Revolving Credit Advance is a part or a Notice of
Letter of Credit in the form of Exhibit D-1 hereto, as the case may be, (ii)
Article II shall have become effective, and (iii) on the date of such Revolving
Credit Borrowing or issuance of such Letter of Credit, the following statements
shall be true (and each of the giving of the applicable Notice of Borrowing or
Notice of Letter of Credit and the acceptance by such Borrower of the proceeds
of such Revolving Credit Borrowing or issuance of such Letter of Credit shall
constitute a representation and warranty by such Borrower that on the date of
such Revolving Credit Borrowing or such Letter of Credit is issued such
statements are true):

                                      -41-
<PAGE>

      (a) each of the representations and warranties contained in Section 4.1
and each of the representations and warranties contained in any other Credit
Document (other than, if the Collateral Release Date has occurred, the Security
Documents and the Guaranties) are correct in all material respects on and as of
the date of such Revolving Credit Borrowing or issuance of such Letter of
Credit, before and after giving effect to such Revolving Credit Borrowing or
issuance of such Letter of Credit, as though made on and as of such date (unless
such representation and warranty speaks solely as of a particular date or a
particular period, in which case, as of such date or for such period); and

      (b) no event has occurred and is continuing, or would result from such
Revolving Credit Borrowing or issuance of such Letter of Credit, which
constitutes a Default or Event of Default;

provided that, notwithstanding anything in this Section 3.2 to the contrary,
with respect to any Letter of Credit issued at the request of a Borrower which
shall automatically renew by their own terms unless a notice of non-renewal is
given by the applicable Issuing Bank, such Issuing Bank may give such notice of
non-renewal (after notice to such Borrower and in no event earlier than the date
10 days prior to the latest date on which it is entitled to do so) if applicable
conditions precedent pursuant to this Section 3.2 are not satisfied at the date
of issuance of the notice of non-renewal.

      SECTION 3.3. Effective Date. The Agent shall notify the Borrowers and the
Banks when it reasonably believes that all the conditions precedent specified in
Section 3.1 have been satisfied in all material respects or waived and such
notice shall be conclusive and binding on all parties to the Credit Documents.
For avoidance of doubt, it is agreed that the matters set forth in Section 3.1
are conditions precedent to the effectiveness of Article II and not conditions
precedent to Revolving Credit Advances or the issuance or increase of Letters of
Credit (which are governed by Section 3.2).

                                   ARTICLE IV

                         REPRESENTATIONS AND WARRANTIES

      SECTION 4.1. Representations and Warranties of the Borrowers. Each
Borrower represents and warrants, on the date hereof, on the date of each
Revolving Credit Borrowing or issuance or increase in the amount of any Letter
of Credit and (in the case of Section 4.1(r) only) on each Revolving Credit
Facility Increase Effective Date and each Letter of Credit Facility Increase
Effective Date, as follows:

      (a) Each Borrower is duly organized or validly formed, validly existing
and (if applicable) in good standing under the laws of the State of Delaware and
has all corporate or limited liability company powers and all governmental
licenses, authorizations, certificates, consents and approvals required to carry
on its business as now conducted in all material respects, except where failure
to be in good standing or to have those licenses, authorizations, certificates,
consents and approvals could not reasonably be expected to have a Material
Adverse Effect in respect of such Borrower. Each Material Subsidiary of each
Borrower is duly organized or validly formed, validly existing and (if
applicable) in good standing under the laws of its jurisdiction of incorporation
or formation, except where the failure to be so organized or formed, existing
and in good standing could not reasonably be expected to have a Material Adverse
Effect in respect of such Borrower. Each Material Subsidiary of a Borrower has
all corporate or limited liability company powers and all governmental licenses,
authorizations, certificates, consents and approvals required to carry on its
business as now conducted in all material respects, except for those licenses,
authorizations, certificates, consents and approvals the failure to have which
could not reasonably be expected to have a Material Adverse Effect in respect of
such Borrower.

                                      -42-
<PAGE>

      (b) The execution, delivery and performance by each of the Borrowers and
the other Credit Parties of the Credit Documents to which it is shown as being a
party and the consummation of the transactions contemplated thereby are within
such Borrower's or such other Credit Party's, as the case may be, corporate or
limited liability company powers, have been duly authorized by all necessary
corporate or limited liability company action, do not contravene (i) any
Borrower's or such other Credit Party's, as the case may be, charter, by-laws or
formation agreement or (ii) law or any restriction under any material agreement
binding on or affecting any Borrower or other Credit Party and will not result
in or require the creation or imposition of any Lien prohibited by this
Agreement.

      (c) No material authorization or approval or other action by, and no
notice to or filing with, any governmental authority or regulatory body is
required for the due execution, delivery and performance by any Credit Party of
any Credit Document to which it is a party, or the consummation of the
transactions contemplated thereby.

      (d) Each Credit Document has been duly executed and delivered by each
appropriate Credit Party, and is the legal, valid and binding obligation of each
such Credit Party, enforceable against each such Credit Party, in accordance
with its terms, except as such enforceability may be limited by any applicable
bankruptcy, insolvency, reorganization, moratorium or similar law affecting
creditors' rights generally and by general principles of equity, and except that
the representations in this sentence in respect of the Security Documents and
the Guaranties are not made after the Collateral Release Date. Each Western
Midstream Subsidiary existing on the Effective Date has duly executed and
delivered a Guaranty, a Security Agreement and a Real Property Mortgage. As to
each Western Midstream Subsidiary created or acquired after the Effective Date,
the Borrowers have complied with Section 5.1(g).

      (e) (i)                The Consolidated balance sheet of TWC and its
Subsidiaries as at December 31, 2003, and the related Consolidated statements of
income and cash flows of TWC and its Subsidiaries for the fiscal year then
ended, copies of which have been furnished to each Bank, fairly present in all
material respects the Consolidated financial condition of TWC and its
Subsidiaries as at such date and the Consolidated results of operations of TWC
and its Subsidiaries for the year ended on such date, all in accordance with
GAAP. As of the Effective Date only, from December 31, 2003 to the date of this
Agreement, there has been no material adverse change in the business, condition
(financial or otherwise), operations, properties or prospects of TWC and its
Subsidiaries (other than Non-Recourse Subsidiaries and International
Subsidiaries), taken as a whole.

                             (ii)   The Consolidated balance sheet of NWP and
its Subsidiaries as at December 31, 2003, and the related Consolidated
statements of income and cash flows of NWP and its Subsidiaries for the fiscal
year then ended, copies of which have been furnished to each Bank, fairly
present in all material respects, the Consolidated financial condition of NWP
and its Subsidiaries as at such date and the Consolidated results of operations
of NWP and its Subsidiaries for the year ended on such date, all in accordance
with GAAP. As of the Effective Date only, from December 31, 2003 to the date of
this Agreement, there has been no material adverse change in the business,
condition (financial or otherwise), operations, properties or prospects of NWP
and its Subsidiaries (other than Non-Recourse Subsidiaries and International
Subsidiaries), taken as a whole.

                             (iii)  The Consolidated balance sheet of TGPL and
its Subsidiaries as at December 31, 2003, and the related Consolidated
statements of income and cash flows of TGPL and its Subsidiaries for the fiscal
year then ended, copies of which have been furnished to each Bank, fairly
present in all material respects, the Consolidated financial condition of TGPL
and its Subsidiaries as at such date and the Consolidated results of operations
of TGPL and its Subsidiaries for the year ended on such date, all in accordance
with GAAP. As of the Effective Date only, from December 31, 2003 to the date of
this Agreement, there has been no material adverse change in the

                                      -43-
<PAGE>

business, condition (financial or otherwise), operations, properties or
prospects of TGPL and its Subsidiaries (other than Non-Recourse Subsidiaries and
International Subsidiaries), taken as a whole.

      (f) There is, as to each Borrower, no pending or, to the knowledge of such
Borrower as of the Effective Date, threatened action or proceeding affecting
such Borrower or any Material Subsidiary of such Borrower before any court,
governmental agency or arbitrator, (i) which could reasonably be expected to
have a Material Adverse Effect in respect of such Borrower, except as set forth
in TWC's annual report on Form 10-K for the year ended December 31, 2003, filed
with the Securities and Exchange Commission, or (ii) which purports to affect
the legality, validity, binding effect or enforceability of any Credit Document.

      (g) No proceeds of any Advance will be used for any purpose or in any
manner contrary to the provisions of Section 5.2(j).

      (h) No Borrower is engaged in the business of extending credit for the
purpose of purchasing or carrying margin stock (within the meaning of Regulation
U issued by the Federal Reserve Board), and no proceeds of any Revolving Credit
Advance will be used to purchase or carry any such margin stock or to extend
credit to others for the purpose of purchasing or carrying any such margin
stock.

      (i) No Borrower is an "investment company" or a company "controlled" by an
"investment company" within the meaning of the Investment Company Act of 1940,
as amended.

      (j) No Termination Event has occurred or is reasonably expected to occur
with respect to any Plan that could reasonably be expected to have a Material
Adverse Effect in respect of any Borrower. No Credit Party nor any Subsidiary or
ERISA Affiliate of any Credit Party has received any notification that any
Multiemployer Plan is in reorganization or has been terminated, within the
meaning of Title IV of ERISA that could reasonably be expected to have a
Material Adverse Effect in respect of any Borrower, and no Credit Party is aware
of any reason to expect that any Multiemployer Plan is to be in reorganization
or to be terminated within the meaning of Title IV of ERISA that would have a
Material Adverse Effect in respect of any Borrower.

      (k) [Reserved]

      (l) No Borrower is a "holding company," or a "subsidiary company" of a
"holding company," or an "affiliate" of a "holding company" or of a "subsidiary
company" of a "holding company," or a "public utility" within the meaning of the
Public Utility Holding Company Act of 1935, as amended.

      (m) Except as set forth in TWC's annual report on Form 10-K for the year
ended December 31, 2003, filed with the Securities and Exchange Commission, or
as disclosed in writing by any Borrower to the Banks and the Agent after the
date hereof and approved in writing by the Majority Banks, each Borrower and its
Material Subsidiaries are in compliance with all applicable Environmental Laws,
except as could not reasonably be expected to have a Material Adverse Effect in
respect of such Borrower. Except as disclosed in writing by any Borrower to the
Banks and the Agent after the date hereof and approved in writing by the
Majority Banks, the aggregate contingent and non-contingent liabilities of each
Borrower and its Material Subsidiaries (other than those reserved for in
accordance with GAAP and excluding liabilities to the extent covered by
insurance if the insurer has confirmed that such insurance covers such
liabilities or which such Borrower reasonably expects to recover from
ratepayers) which to such Borrower's knowledge are reasonably expected to arise
in connection with (i) the requirements of any Environmental Law or (ii) any
obligation or liability to any Person in connection with any Environmental
matters (including any release or threatened release (as such terms are defined
in the Comprehensive Environmental Response, Compensation and Liability Act of
1980) of any Hazardous

                                      -44-
<PAGE>

Waste, Hazardous Substance, other waste, petroleum or petroleum products into
the Environment) could not reasonably be expected to have a Material Adverse
Effect in respect of such Borrower. Each Borrower and its Material Subsidiaries
holds, or has submitted a good faith application for all Environmental Permits
(none of which have been terminated or denied) required for any of its current
operations or for any property owned, leased, or otherwise operated by it; and
is, and within the period of all applicable statutes of limitation has been, in
compliance with all of its Environmental Permits, except where the failure to
comply with the matters set forth in this sentence, in the aggregate, could not
reasonably be expected to have a Material Adverse Effect in respect of such
Borrower.

      (n) Unless the Collateral Release Date has occurred, the Western Midstream
Subsidiaries have sufficient title to all Western Midstream Assets as is
necessary for the conduct of the Western Midstream Business after the date
hereof.

      (o) Unless the Collateral Release Date has occurred, the Western Midstream
Subsidiaries own, lease or hold all Western Midstream Assets necessary or
appropriate for the operation and carrying on of the Western Midstream Business.

      (p) No Default or Event of Default has occurred and is continuing.

      (q) Unless the Collateral Release Date has occurred, except as would not
have a material adverse effect on the conduct of the Western Midstream Business,
to TWC's knowledge, the various gathering systems which comprise part of the
Western Midstream Assets are covered by recorded fee deeds, rights of way,
easements, leases, servitudes, permits, licenses, or other instruments in favor
of the Western Midstream Subsidiaries (or their predecessors in title) and their
successors and assigns, which instruments establish a contiguous right of way
for the respective gathering systems and grant the right to construct, operate,
and maintain the respective gathering system in, over, under, and across the
land covered thereby; provided, that certain licenses and permits from
railroads, utilities, owners of meter sites, and from the various state and
local Governmental Authorities and rights granted by Hydrocarbon producers on
their respective properties may not be recorded. Unless the Collateral Release
Date has occurred, to TWC's knowledge, the pipelines comprising the various
gathering systems which are part of the Western Midstream Assets are located
within the confines of contiguous rights of way in all material respects and do
not encroach upon any adjoining property in any material respects. Unless the
Collateral Release Date has occurred, to TWC's knowledge, the rights of ingress
and egress held by the Western Midstream Subsidiaries with respect to such
gathering systems allow the applicable Western Midstream Subsidiaries to
inspect, operate, repair, and maintain such gathering systems in a normal manner
in all material respects.

      (r) As of the Effective Date, each Revolving Credit Facility Increase
Effective Date and each Letter of Credit Facility Increase Effective Date only,
after giving effect to the Credit Documents delivered on the Effective Date,
each Credit Party, individually and together with its Subsidiaries, is Solvent.

      (s) Unless the Collateral Release Date has occurred and subject to Section
5.1(e)(ii) below,

                  (i)   an Acceptable Security Interest in all Collateral will
      exist, to the extent that an Acceptable Security Interest can be created
      in such Collateral by the filing of a financing statement, the recording
      of a Real Property Mortgage or the taking of possession under the Uniform
      Commercial Code of the relevant jurisdiction, and only to the extent such
      actions are required herein or by the relevant Security Document.

                                      -45-
<PAGE>

                  (ii)  the Credit Parties are the legal and beneficial owners
      of the Collateral free and clear of any lien other than Collateral
      Permitted Liens.

      (t) As of the Effective Date only, neither the Information Memorandum nor
any of the other reports, financial statements, certificates or other written
information furnished by or on behalf of any Borrower to the Agent or any Bank
on or prior to the Effective Date (as modified or supplemented by other
information so furnished on or prior to the Effective Date), taken as a whole,
contains any material misstatement of fact or omits to state any material fact
necessary to make the statements therein, in the light of the circumstances
under which they were made, not materially misleading, provided that, with
respect to any projected financial information, the Borrowers represent only
that such information was prepared in good faith based upon assumptions believed
by the Borrowers to be reasonable at the time (it being recognized, however,
that projections as to future events are not to be viewed as facts and that the
actual results during the period or periods covered by any projections may
materially differ from the projected results). None of the reports, financial
statements, certificates or other written information furnished by or on behalf
of any Borrower to the Agent, any Issuing Bank or any Bank after the Effective
Date (as modified or supplemented by other information so furnished after the
Effective Date), taken as a whole, contains any material misstatement of fact or
omits to state any material fact necessary to make the statements therein, in
the light of the circumstances under which they were made, not materially
misleading.

                                   ARTICLE V

                           COVENANTS OF THE BORROWERS

      SECTION 5.1. Affirmative Covenants. So long as any Revolving Credit
Advance shall remain unpaid, any Letter of Credit or Reimbursement Obligation
shall remain outstanding, any Letter of Credit Liability shall exist or any
Issuing Bank or any Bank shall have any Commitment hereunder, each Borrower
will, unless the Majority Banks shall otherwise consent in writing:

      (a) Compliance with Laws, Etc. Comply, and cause each of its Material
Subsidiaries to comply, with all applicable laws, rules, regulations and orders,
including ERISA and all Environmental Laws, such compliance to include, without
limitation, the payment and discharge before the same become delinquent of all
taxes, assessments and governmental charges or levies imposed upon it or any of
its Material Subsidiaries or upon any of its property or any property of any of
its Material Subsidiaries, and all lawful claims which, if unpaid, would become
a Lien upon any property of it or any of its Material Subsidiaries (except where
failure to comply could not reasonably be expected to have a Material Adverse
Effect in respect of such Borrower); provided that no Borrower nor any Material
Subsidiary of a Borrower shall be required to pay any such tax, assessment,
charge, levy or claim which is being contested in good faith and by proper
proceedings and with respect to which reserves in conformity with GAAP, if
required by GAAP, have been provided on the books of such Borrower or such
Material Subsidiary, as the case may be.

      (b) Reporting Requirements. Furnish to the Agent:

                  (i)   as soon as possible and in any event within five
      Business Days after an Authorized Officer of such Borrower obtains
      knowledge of the occurrence of any Default or Event of Default, continuing
      on the date of such statement, a statement of an Authorized Financial
      Officer of such Borrower setting forth the details of such Default or
      Event of Default and the actions, if any, which such Borrower has taken
      and proposes to take with respect thereto;

                                      -46-
<PAGE>

                  (ii)  as soon as available and in any event not later than 60
      days after the end of each of the first three Fiscal Quarters of each
      Fiscal Year of such Borrower, (1) the unaudited Consolidated balance sheet
      of such Borrower and its Consolidated Subsidiaries as of the end of such
      Fiscal Quarter and the unaudited Consolidated statements of income and
      cash flows of such Borrower and its Consolidated Subsidiaries for the
      period commencing at the end of the previous year and ending with the end
      of such Fiscal Quarter, all in reasonable detail and duly certified by an
      Authorized Financial Officer of such Borrower as fairly presenting in all
      material respects the Consolidated financial condition of such Borrower
      and its Consolidated Subsidiaries as of the end of such Fiscal Quarter and
      the Consolidated results of operations of such Borrower and its
      Consolidated Subsidiaries for such period; provided that, if any financial
      statement referred to in this clause (ii) of this Section 5.1(b) is so
      certified and is readily available on-line through EDGAR as of the date on
      which such financial statement is required to be delivered hereunder, such
      Borrower shall not be obligated to furnish copies of such financial
      statement; and (2) a certificate of an Authorized Financial Officer of
      such Borrower (a) stating that he has no knowledge that a Default or Event
      of Default has occurred and is continuing or, if a Default or Event of
      Default has occurred and is continuing, a statement as to the nature
      thereof and the action, if any, which such Borrower proposes to take with
      respect thereto, and (b) showing in detail the calculation supporting such
      statement in respect of Section 5.2(b) and, if such Borrower is TWC,
      Section 5.2(c), but the certificate contemplated by this clause (2) shall
      not be required for any Fiscal Quarter ending prior to the Effective Date;

                  (iii) as soon as available and in any event not later than 105
      days after the end of each Fiscal Year of such Borrower ending after the
      Effective Date, (1) a copy of the annual audited report for such Fiscal
      Year for such Borrower and its Consolidated Subsidiaries, including the
      Consolidated balance sheet of such Borrower and its Consolidated
      Subsidiaries as of the end of such Fiscal Year and the Consolidated
      statements of income and cash flows of such Borrower and its Consolidated
      Subsidiaries for such Fiscal Year, in each case prepared in accordance
      with GAAP and reported on by Ernst & Young, LLP or other independent
      certified public accountants of recognized national standing; provided
      that if any audited report referred to in this clause (iii) of Section
      5.1(b) is readily available on-line through EDGAR as of the date on which
      such financial statement is required to be delivered hereunder, such
      Borrower shall not be obligated to furnish copies of such audited report;
      and (2) a certificate of an Authorized Financial Officer of such Borrower
      (a) stating that he has no knowledge that a Default or Event of Default
      has occurred and is continuing, or if a Default or Event of Default has
      occurred and is continuing, a statement as to the nature thereof, and the
      action, if any, which such Borrower proposes to take with respect thereto
      and (b) showing in detail the calculations supporting such statement in
      respect of Section 5.2(b) and, if such Borrower is TWC, Section 5.2(c);

                  (iv)  such other information (other than projections)
      respecting the business or properties, or the condition or operations,
      financial or otherwise, of such Borrower or any of its Material
      Subsidiaries as any Bank through the Agent may from time to time
      reasonably request;

                  (v)   promptly after the sending or filing thereof, copies of
      all proxy material, reports and other information which TWC sends to its
      security holders generally, and copies of all final reports and final
      registration statements which such Borrower or any Subsidiary of such
      Borrower files with the Securities and Exchange Commission or any national
      securities exchange; provided that, if such proxy materials and reports,
      registration statements and other information are readily available
      on-line through EDGAR, such Borrower or Subsidiary shall not be obligated
      to furnish copies thereof;

                                      -47-
<PAGE>

                  (vi)  as soon as possible and in any event within 30 Business
      Days after such Borrower or any Subsidiary or ERISA Affiliate of such
      Borrower knows or has reason to know that any Termination Event with
      respect to any Plan has occurred or is reasonably expected to occur that
      could reasonably be expected to have a Material Adverse Effect in respect
      of such Borrower, a statement of an Authorized Financial Officer of such
      Borrower describing such Termination Event and the action, if any, which
      such Borrower proposes to take with respect thereto;

                  (vii) promptly and in any event within 25 Business Days after
      receipt thereof by such Borrower or any ERISA Affiliate of such Borrower,
      copies of each notice received by such Borrower or any ERISA Affiliate of
      such Borrower from the PBGC stating its intention to terminate any Plan or
      to have a trustee appointed to administer any Plan;

                  (viii) promptly and in any event within 25 Business Days after
      receipt thereof by such Borrower or any ERISA Affiliate of such Borrower
      from the sponsor of a Multiemployer Plan, a copy of each notice received
      by such Borrower or any ERISA Affiliate of such Borrower concerning (A)
      the imposition of a Withdrawal Liability by a Multiemployer Plan, (B) the
      determination that a Multiemployer Plan is, or is expected to be, in
      reorganization within the meaning of Title IV of ERISA, (C) the
      termination of a Multiemployer Plan within the meaning of Title IV of
      ERISA, or (D) the amount of liability incurred, or expected to be
      incurred, by such Borrower or any ERISA Affiliate of such Borrower in
      connection with any event described in clause (A), (B) or (C) above that,
      in the aggregate, could reasonably be expected to have a Material Adverse
      Effect in respect of such Borrower; and

                  (ix)  promptly after any withdrawal or termination of any
      letter of credit, guaranty, insurance or other credit enhancement referred
      to in Section 1.5 or any change in the rating set forth therein or any
      change in, or issuance, withdrawal or termination of, the rating of any
      senior unsecured long-term debt of such Borrower by S&P or Moody's, notice
      thereof.

      (c) Maintenance of Insurance. Maintain, and cause each of its Material
Subsidiaries to maintain, insurance with responsible and reputable insurance
companies or associations in such amounts and covering such risks as is usually
carried by companies engaged in similar businesses and owning similar properties
in the same general areas in which such Borrower or such Material Subsidiaries
operate, and cause the Collateral Agent to be named as an additional insured on
all such insurance carried in respect of the Collateral at all times until the
Collateral Release Date; provided that such Borrower or any such Material
Subsidiary may self-insure to the extent and in the manner normal for companies
of like size, type and financial condition, provided further that any insurance
required by this Section 5.1(c) may be maintained by TWC on behalf of the other
Borrowers and their Material Subsidiaries. For avoidance of doubt, the
Collateral Agent is not required to be named as loss payee on casualty
insurance.

      (d) Preservation of Corporate Existence, Etc. Preserve and maintain, and
cause each of its Material Subsidiaries to preserve and maintain, its existence
as a corporation or other Business Entity, rights and franchises in the
jurisdiction of its incorporation or formation, and qualify and remain
qualified, and cause each Material Subsidiary to qualify and remain qualified,
as a foreign entity in each jurisdiction in which qualification is necessary or
desirable in view of its business and operations or the ownership of its
properties, except (i) in the case of any Material Subsidiary of such Borrower
(other than a Credit Party), where the failure of such Material Subsidiary to so
maintain its existence could not reasonably be expected to have a Material
Adverse Effect in respect of such Borrower, (ii) where the failure to preserve
and maintain such rights and franchises (other than existence) or to so qualify
and remain qualified could not reasonably be expected to have a Material Adverse
Effect in respect of such

                                      -48-
<PAGE>

Borrower, and (iii) such Borrower and its Material Subsidiaries may consummate
any merger or consolidation permitted pursuant to Section 5.2(d) and other
dispositions permitted hereunder.

      (e) Acceptable Security Interest. At all times prior to the Collateral
Release Date:

                  (i)   subject to Section 5.1(e)(ii) below, cause an Acceptable
      Security Interest to exist in all Collateral to the extent that an
      Acceptable Security Interest can be created therein by the filing of a
      financing statement, the recording of a Real Property Mortgage or the
      taking of possession under the Uniform Commercial Code of the relevant
      jurisdiction, and only to the extent such actions are required herein or
      by the relevant Security Document; and

                  (ii)  promptly upon the request of the Collateral Agent upon
      the occurrence and during the continuance of an Event of Default, cause an
      Acceptable Security Interest to exist in all Collateral.

      (f) Further Assurances. At any time and from time to time prior to the
Collateral Release Date, at its expense, execute and deliver to, and cause each
of the Western Midstream Subsidiaries and WFSGI to execute and deliver to, the
Collateral Agent such further instruments and documents (other than legal
opinions regarding the perfection of Collateral acquired after the Effective
Date), and take such further action, as the Majority Banks may from time to time
reasonably request, for the purposes of implementing or effectuating the
provisions of this Agreement and the other Credit Documents and to establish and
protect the rights, interests and remedies with respect to the Collateral
(whether now owned, leased or hereafter acquired) created, or intended to be
created pursuant hereto or thereto, and on the terms set forth herein or
therein, in favor of the Collateral Agent, any of the Issuing Banks or any of
the Banks, including the execution, delivery, recordation and filing of any
necessary documentation and any deliveries of Collateral necessary to grant an
Acceptable Security Interest in all Collateral, all as contemplated by and to
the extent set forth in Section 3.1, Section 5.1(e), Section 5.1(g) or Section
5.1(l).

      (g) Midstream Subsidiaries. Prior to the Collateral Release Date, in each
case at such Borrower's expense:

                  (i)   with respect to any Person that becomes a Western
      Midstream Subsidiary, promptly (and in any event within 60 days after such
      Person becomes a Western Midstream Subsidiary): (i) cause the parent of
      such Western Midstream Subsidiary to create an Acceptable Security
      Interest in all Equity Interests of such Western Midstream Subsidiary,
      including delivering to the Collateral Agent all certificates representing
      such Equity Interests, together with a duly executed but blank stock power
      in the form of Schedule III to the Pledge, or otherwise reasonably
      acceptable to the Collateral Agent, for each such certificate, and (ii)
      cause such Western Midstream Subsidiary to (A) provide to the Collateral
      Agent a guaranty in substantially the form of Exhibit E-2, a security
      agreement in substantially the form of Exhibit G and such comparable
      documentation which is in form and substance reasonably satisfactory to
      the Collateral Agent, and (B) take all actions necessary or advisable to
      cause an Acceptable Security Interest to exist in all Collateral owned or
      hereafter acquired by such Western Midstream Subsidiary, only to the
      extent such Acceptable Security Interest can be created by the filing of a
      financing statement, or recording of a Real Property Mortgage in the
      relevant jurisdiction.

                  (ii)  So long as no Event of Default exists, promptly grant to
      the Collateral Agent, but in no event later than 90 days after the
      acquisition of any real property interests, Acceptable Security Interests
      in such owned real property interests, including any fixtures associated
      therewith, of any Western Midstream Subsidiary as is acquired after the
      Effective Date by such Western Midstream Subsidiary and that, together
      with any improvements thereon, which,

                                      -49-
<PAGE>

      individually, has a value of at least $20,000,000, or, in the aggregate
      and are acquired during any 12 month period, have a value of at least
      $40,000,000. Upon the occurrence and during the continuance of an Event of
      Default, promptly, upon the request of the Collateral Agent, grant an
      Acceptable Security Interest in all real property interests owned by each
      Western Midstream Subsidiary. Such Acceptable Security Interest shall be
      granted pursuant to a mortgage or deed of trust, as appropriate, in
      substantially the form of Exhibit H and reasonably satisfactory in form
      and substance to the Collateral Agent (each such mortgage or deed of trust
      being an "Additional Mortgage"). The Additional Mortgages or instruments
      related thereto shall be duly recorded or filed in such manner and in such
      places as are required by law to establish, perfect, preserve and protect
      an Acceptable Security Interest and all taxes, fees and other charges
      payable in connection therewith shall be paid in full.

                  (iii) To the extent the Initial Mortgages do not create an
      Acceptable Security Interest in all real property interests (other than
      leases) owned by the Western Midstream Subsidiaries on the Effective Date
      that are necessary and material to the operations of the Western Midstream
      Business, the Western Midstream Subsidiaries shall, promptly upon the
      request of the Collateral Agent, but in any event within 90 days, grant an
      Acceptable Security Interest in such real property, including by executing
      a mortgage or deed of trust, as appropriate, in substantially the form of
      Exhibit H and reasonably satisfactory in form and substance to the
      Collateral Agent.

      (h) Inspection Rights. Permit, and cause WFSGI and each Guarantor to
permit, any representatives designated by the Agent, the Collateral Agent or the
Majority Banks, upon reasonable prior notice, at the Banks' expense so long as
no Event of Default exists and at TWC's expense during the continuance of an
Event of Default, to visit and inspect its properties with an Authorized Officer
of a Borrower present, to examine and make extracts from its books and records,
and to discuss its affairs, finances and condition with its officers, all at
such reasonable times and as often as reasonably requested but no more
frequently than semi-annually so long as no Event of Default exists; provided
that, insofar as WFSGI is concerned, this Section 5.1(h) shall apply only prior
to the Collateral Release Date and only as to matters relating to the Pledge,
the Western Midstream Assets, the Western Midstream Business and the Western
Midstream Subsidiaries.

      (i) Payment of Obligations. Pay, and cause each of its Material
Subsidiaries to pay, before the same shall become delinquent or in default, all
obligations that, if not paid, could reasonably be expected to have a Material
Adverse Effect in respect of such Borrower or, prior to the Collateral Release
Date, that, if not paid, would result in the loss of, or adversely affect the
Lien of the Collateral Agent in, or the perfection or priority of, Collateral
having a fair market value (in the aggregate for all such Collateral) in excess
of $100,000,000, except where (a) the validity or amount thereof is being
contested in good faith by appropriate proceedings, (b) such Borrower or such
Material Subsidiary has set aside on its books adequate reserves with respect
thereto in accordance with GAAP and (c) the failure to make payment pending such
contest could not reasonably be expected to have a Material Adverse Effect in
respect of such Borrower and would not, prior to the Collateral Release Date,
result in the loss of any Collateral having a fair market value (in the
aggregate for all such Collateral) in excess of $100,000,000 or affect the Lien
of the Collateral Agent in any Collateral or the perfection or priority thereof.

      (j) Maintenance of Properties. Keep and maintain, and cause each of its
Material Subsidiaries to keep and maintain, all property material to the conduct
of the business of such Borrower and its Subsidiaries, taken as a whole, in good
working order and condition, ordinary wear and tear excepted, in the reasonable
business judgment of such Borrower.

                                      -50-
<PAGE>

      (k) Books and Records. Keep, and cause each of its Material Subsidiaries
to keep, books of record and account in accordance with GAAP.

      (l) Grantors. Until the Collateral Release Date, cause each of its
Subsidiaries that is either a Guarantor or WFSGI, at the expense of such
Borrower, to do each of the following (capitalized terms used in this Section
5.1(l) that are defined in the Western Midstream Security Agreement or the
Pledge and not defined herein are used herein as therein defined), except that
only Sections 5.1(l)(xiii)(1) and 5.1(l)(xiii)(2) shall apply to Pipeline Holdco
and only Sections 5.1(l)(i), 5.1(l)(x), 5.1(l)(xi), 5.1(l)(xii) and 5.1(l)(xiv)
shall apply to WFSGI:

                  (i)   Subject to 5.1(1)(ii) below, cause an Acceptable
      Security Interest to exist at all times in all Collateral in which such
      Guarantor has an interest to the extent that an Acceptable Security
      Interest can be created in such Collateral by the filing of a financing
      statement, the recording of a Real Property Mortgage or the taking of
      possession under the Uniform Commercial Code of the relevant jurisdiction,
      only to the extent such actions are required herein or by the relevant
      Security Document, at all times prior to the Collateral Release Date;

                  (ii)  Promptly upon the request of the Collateral Agent upon
      the occurrence and during the continuance of an Event of Default, cause an
      Acceptable Security Interest to exist in all Collateral;

                  (iii) Promptly upon the request of the Collateral Agent upon
      the occurrence and during the continuance of an Event of Default, deliver
      to the Collateral Agent the originals of all Contracts, Contract Documents
      and documents evidencing Receivables of such Guarantor;

                  (iv)  Promptly upon the request of the Collateral Agent upon
      the occurrence and during the continuance of an Event of Default, deliver
      and pledge to the Collateral Agent any and all Investment Property,
      Instruments, Documents, Contract Documents or other Collateral in which
      such Guarantor has an interest and all documents evidencing such
      Collateral (in each case to the extent a security interest therein may be
      perfected by possession), indorsed and/or accompanied by such instruments
      of assignment and transfer and consents as the Collateral Agent may
      request, all in such form and substance as the Collateral Agent may
      request in order to perfect the security interests granted by the Western
      Midstream Security Agreement in such Collateral;

                  (v)   Promptly upon the request of the Collateral Agent upon
      the occurrence and during the continuance of an Event of Default, take any
      and all actions reasonably requested by the Collateral Agent to ensure
      that the Collateral Agent has "control" (within the meaning of Section
      8-106 of the UCC) of Collateral in which such Guarantor which is a Western
      Midstream Subsidiary has an interest constituting Investment Property and
      deposit accounts (as defined in the UCC (but only Investment Property and
      deposit accounts of the Western Midstream Subsidiaries);

                  (vi)  Unless notified to the contrary by the Collateral Agent,
      enforce collection of any amounts payable under the Contracts in a manner
      consistent with prudent business standards;

                  (vii) Keep and maintain satisfactory and complete records of
      such Guarantor's Receivables in a manner consistent with prudent business
      standards, including records of all

                                      -51-
<PAGE>

      payments received and all credits granted thereon, and make the same
      available to the Collateral Agent for inspection at any time as the
      Collateral Agent may request;

                  (viii) Promptly upon the request of the Collateral Agent upon
      the occurrence and during the continuance of an Event of Default, deliver
      all tangible evidence of such Guarantor's Receivables (including all
      documents evidencing such Receivables) and books and records that the
      Collateral Agent may request to the Collateral Agent or to its
      representatives at such times as the Collateral Agent may reasonably
      request;

                  (ix)  Promptly upon the request of the Collateral Agent upon
      the occurrence and during the continuance of an Event of Default, legend
      in form and substance reasonably satisfactory to the Collateral Agent, the
      Receivables and Contracts and Contract Documents, as well as books,
      records and documents of such Guarantor evidencing or pertaining to the
      Receivables of such Guarantor, with an appropriate reference to the fact
      that such items of Collateral have been assigned to the Collateral Agent
      as security and that the Collateral Agent has a security interest therein;

                  (x)   Cause each issuer of Equity Interests comprising Pledged
      Collateral not to issue any stock or other securities in addition to or in
      substitution for the Equity Interests comprising the Pledged Collateral
      issued by such issuer;

                  (xi)  Without limiting the generality of the foregoing
      provisions, upon such Guarantor obtaining any additional Equity Interests
      of any issuer of the Pledged Collateral, Equity Interests in the entities
      described in Section 1(b) of the Pledge or any other Equity Interests or
      other securities constituting Pledged Collateral, promptly (and in any
      event within two Business Days) deliver to the Collateral Agent (i) such
      Equity Interests or other securities, (ii) a duly executed but blank stock
      power in the form of Schedule III to the Pledge, or otherwise acceptable
      to the Collateral Agent, for each certificate representing such additional
      Pledged Collateral, and (iii) a duly executed Pledge Agreement Supplement
      in substantially the form of Schedule IV to the Pledge (a "Pledge
      Agreement Supplement") or as may otherwise be required by the Collateral
      Agent identifying the additional shares which are pledged pursuant to this
      Agreement;

                  (xii) Cause WFSGI to own, directly or indirectly, at all times
      all Equity Interests of each Western Midstream Subsidiary and cause an
      Acceptable Security Interest to exist at all times in all such Equity
      Interests;

                  (xiii) Furnish to the Agent:

                  (1)   as soon as available and in any event not later than 60
            days after the end of each of the first three Fiscal Quarters of
            each Fiscal Year of Pipeline Holdco, the unaudited Consolidated
            balance sheet of Pipeline Holdco and its Consolidated Subsidiaries
            as of the end of such Fiscal Quarter and the unaudited Consolidated
            statements of income and cash flows of Pipeline Holdco and its
            Consolidated Subsidiaries for the period commencing at the end of
            the previous year and ending with the end of such Fiscal Quarter,
            all in reasonable detail and duly certified (subject to year-end
            audit adjustments and the lack of footnotes) by an Authorized
            Financial Officer of Pipeline Holdco as having been prepared in
            accordance with GAAP;

                  (2)   as soon as available and in any event not later than 120
            days after the end of each Fiscal Year of Pipeline Holdco ending
            after the Effective Date, the audited

                                      -52-
<PAGE>

            Consolidated balance sheet of Pipeline Holdco and its Consolidated
            Subsidiaries as of the end of such Fiscal Year and the Consolidated
            statements of income and cash flows of Pipeline Holdco and its
            Consolidated Subsidiaries for such Fiscal Year, in each case
            prepared in accordance with GAAP; and

                  (3)   not later than 60 days (or, in the case of any calendar
            quarter ending on December 31, 105 days) following the end of each
            calendar quarter, an operational report for such quarter prepared by
            the Company and a statement of the outstanding amount of Debt of the
            Western Midstream Subsidiaries as of the end of such quarter, it
            being understood that such report and statement will not be required
            to be prepared in accordance with GAAP; and

                  (xiv) Cause all assets directly related to the Western
            Midstream Business that are owned by TWC or any of its Subsidiaries
            to be owned at all times by one or more Western Midstream
            Subsidiaries, other than Excluded Assets and any assets sold or
            disposed of pursuant to any disposition permitted hereunder.

      SECTION 5.2. Negative Covenants. So long as any Revolving Credit Advance
shall remain unpaid, any Letter of Credit or Reimbursement Obligation shall
remain outstanding, any Letter of Credit Liability shall exist or any Issuing
Bank or any Bank shall have any Commitment hereunder, no Borrower will, without
the written consent of the Majority Banks (it being understood that each of the
permitted exceptions to each of the covenants in this Section 5.2 is in addition
to, and not overlapping with, any other of such permitted exceptions to such
covenant, except to the extent expressly provided therein):

      (a) Liens, Etc. (i) Permit any of the Western Midstream Subsidiaries to
create, assume, incur or suffer to exist, any Lien on or in respect of any of
its property, whether now owned or hereafter acquired, in each case to secure or
provide for the payment of either (A) any Debt of itself or any other Person or
(B) prior to the Collateral Release Date, any trade payable or other obligation
or liability of itself or any other Person; provided, that, notwithstanding the
foregoing, Western Midstream Subsidiaries may create, incur, assume or suffer to
exist Collateral Permitted Liens and, on and after the Collateral Release Date,
General Permitted Liens; or (ii) create, assume, incur or suffer to exist, or
permit any of its Material Subsidiaries (other than Western Midstream
Subsidiaries) to create, assume, incur or suffer to exist, any Lien on or in
respect of any of its property, whether now owned or hereafter acquired, in each
case to secure or provide for the payment of any Debt of itself or any other
Person (other than obligations or liabilities that are (1) incurred, and are
owed to trading counterparties, in the ordinary course of the trading business
of the Borrowers or any of their Subsidiaries (other than Non-Recourse
Subsidiaries and International Subsidiaries), and (2) secured only by cash,
short term investments or a Letter of Credit); provided, that, notwithstanding
the foregoing, the Borrowers or any of their Material Subsidiaries (other than
Western Midstream Subsidiaries) may create, incur, assume or suffer to exist
General Permitted Liens.

      (b) Debt.

                  (i)   In the case of TWC, permit the ratio of (A) the
      aggregate amount of Consolidated Debt of TWC and its Consolidated
      Subsidiaries to (B) the sum of the Consolidated Net Worth of TWC plus the
      aggregate amount of Consolidated Debt of TWC and its Consolidated
      Subsidiaries to exceed on the last day of any Fiscal Quarter of TWC ending
      after the Effective Date (x) on or before December 31, 2004, 0.75 to 1.00,
      (y) after December 31, 2004 and on or before December 31, 2005, 0.70 to
      1.00 and (z) after December 31, 2005, 0.65 to 1.00;

                                      -53-
<PAGE>

                  (ii)  In the case of any Borrower (other than TWC), permit the
      ratio of (A) the aggregate amount of Consolidated Debt of such Borrower
      and its Consolidated Subsidiaries, to (B) the sum of the Consolidated Net
      Worth of such Borrower plus the aggregate amount of Consolidated Debt of
      such Borrower and its Consolidated Subsidiaries to exceed, on the last day
      of any Fiscal Quarter of such Borrower ending after the Effective Date,
      0.55 to 1.00;

                  (iii) In the case of TWC, create, incur or assume, or permit
      any of its Subsidiaries to create, incur or assume, any Debt at any time,
      if after giving effect to such Debt, the ratio of (A) the aggregate amount
      of Consolidated Debt of TWC and its Consolidated Subsidiaries to (B) the
      sum of the Consolidated Net Worth of TWC as of the end of the Fiscal
      Quarter of TWC most recently ended prior to such time for which the
      appropriate financial information is available (adjusted, at TWC's option,
      to give effect, in accordance with GAAP, to all material asset
      acquisitions and dispositions by TWC and its Consolidated Subsidiaries
      since the end of such Fiscal Quarter) plus the aggregate amount of
      Consolidated Debt of TWC and its Consolidated Subsidiaries would exceed at
      such time (x) if such time is on or before December 31, 2004, 0.75 to
      1.00, (y) if such time is after December 31, 2004 and on or before
      December 31, 2005, 0.70 to 1.00 and (z) if such time is after December 31,
      2005, 0.65 to 1.00; and

                  (iv)  In the case of any Borrower (other than TWC), create,
      incur or assume, or permit any of its Subsidiaries to create, incur or
      assume, any Debt at any time, if after giving effect to such Debt, the
      ratio of (A) the aggregate amount of Consolidated Debt of such Borrower
      and its Consolidated Subsidiaries to (B) the sum of the Consolidated Net
      Worth of such Borrower as of the end of the Fiscal Quarter of such
      Borrower most recently ended prior to such time for which the appropriate
      financial information is available (adjusted, at such Borrower's option,
      to give effect, in accordance with GAAP, to all material asset
      acquisitions and dispositions by such Borrower and its Consolidated
      Subsidiaries since the end of such Fiscal Quarter) plus the aggregate
      amount of Consolidated Debt of such Borrower and its Consolidated
      Subsidiaries would exceed at such time 0.55 to 1.00.

      (c) EBITDA to Interest Expense Ratio. Permit, for any Measurement Period,
the ratio of (i) EBITDA to (ii) Interest Expense to be less than (A) 1.50 to
1.00, for any Measurement Period ending on or before March 31, 2005, (B) 2.00 to
1.00 for any Measurement Period ending after March 31, 2005 and on or before
December 31, 2005 or (C) 2.50 to 1.00 for any Measurement Period ending after
December 31, 2005. For avoidance of doubt, it is agreed that such ratio will be
computed for an entire Measurement Period and not for each day in such
Measurement Period.

      (d) Merger and Sale of Assets. Merge or consolidate with or into any other
Person, or sell, lease or otherwise transfer all or substantially all of its
assets, or permit any Guarantor to merge or consolidate with or into any other
Person, or sell, lease or otherwise transfer all or substantially all of such
Guarantor's assets (or permit any Guarantor to do so), except that this Section
5.2(d) shall not prohibit (i) any sale or transfer permitted by Section 5.2(f)
or 5.2(k) or any sale or transfer of any Non-Recourse Subsidiary or
International Subsidiary or the assets of any Non-Recourse Subsidiary or of any
International Subsidiary, (ii) any sale, lease or transfer between Western
Midstream Subsidiaries or merger or consolidation involving only Western
Midstream Subsidiaries or (iii) any merger or consolidation by any Borrower or
any Guarantor with any Person that is neither a Borrower nor a Guarantor, if
such Borrower or Guarantor, as the case may be, is the surviving entity, so long
as, in each case, if applicable, prior to the Collateral Release Date, all Liens
on Collateral continue as Acceptable Security Interests following any such
transaction.

      (e) Agreements to Restrict Certain Transfers. Enter into or suffer to
exist, or permit any of its Subsidiaries to enter into or suffer to exist, any
consensual encumbrance or consensual restriction on its

                                      -54-
<PAGE>

ability or the ability of any of its Subsidiaries (i) to pay, directly or
indirectly, dividends or make any other distributions in respect of its Equity
Interests or pay any Debt or other obligation owed to a Borrower or to any
Subsidiary of any Borrower; or (ii) to make loans or advances to a Borrower or
any Subsidiary thereof, except (1) encumbrances and restrictions on any
Subsidiary that is not a Material Subsidiary, (2) those encumbrances and
restrictions existing on the date hereof, and other customary encumbrances and
restrictions now or hereafter existing that are not more restrictive in any
material respect, taken as a whole, than the encumbrances and restrictions
existing on the date hereof (provided that the application of any such
restrictions and encumbrances to additional Subsidiaries not subject thereto on
the date hereof shall not be deemed to make such restrictions and encumbrances
more restrictive), (3) encumbrances or restrictions on any Non-Recourse
Subsidiary or International Subsidiary, including those arising in connection
with Non-Recourse Debt or International Debt, (4) encumbrances and restrictions
on any Midstream Asset MLP, (5) encumbrances and restrictions on RMT or any
Subsidiary of RMT pursuant to the RMT Loan Agreement, (6) encumbrances or
restrictions existing under or by reason of (A) applicable law (including rules,
regulations and agreements with regulatory authorities), (B) any agreement or
instrument in effect at the time a Person is acquired by a Borrower or any
Subsidiary of a Borrower, so long as such agreement was not entered into in
contemplation of such acquisition, (C) any agreement for the sale or other
disposition of a Subsidiary of a Borrower that restricts distributions by that
Subsidiary pending its sale or other disposition or (D) provisions with respect
to distributions of assets or property in joint venture agreements, asset sale
agreements, stock sale agreements and other similar agreements; provided that
such encumbrances or restrictions apply only to the assets or property subject
to such joint venture, asset sale, stock sale or similar agreement or to the
assets or property being sold, as the case may be, and (7) encumbrances or
restrictions existing under or by reason of Collateral Permitted Liens or
General Permitted Liens securing debt otherwise permitted to be incurred under
this Section 5.2 that limit the right of the debtor to dispose of the assets
subject to such Collateral Permitted Liens or General Permitted Liens.

      (f) Maintenance of Ownership of Certain Subsidiaries. (i) Sell, issue or
otherwise dispose of, or create, assume, incur or 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 Interest of, or any direct or indirect interest in any Equity
Interest of, Pipeline Holdco, NWP or TGPL, or (ii) sell or otherwise dispose of,
or permit any of its Subsidiaries to sell or otherwise dispose of, all or
substantially all of RMT or all or substantially all of the assets of RMT;
provided that clause (ii) of this Section 5.2(f) shall not prohibit the sale or
other disposition of the Equity Interests in RMT to the Borrower or any
Wholly-Owned Subsidiary of a Borrower if, but only if, (x) there shall not exist
or result a Default or Event of Default and (y) in the case of each sale or
other disposition referred to in this proviso involving a Borrower or any of its
Subsidiaries, such sale or other disposition could not reasonably be expected to
impair materially the ability of such Borrower to perform its obligations
hereunder or under any other Credit Document and such Borrower shall continue to
exist.

      (g) Compliance with ERISA. (i) Terminate, or permit any ERISA Affiliate of
such Borrower to terminate, any Plan so as to result in any material liability
of such Borrower, any Material Subsidiary of such Borrower or any such ERISA
Affiliate to the PBGC, if such material liability of such ERISA Affiliate could
reasonably be expected to have a Material Adverse Effect in respect of such
Borrower, or (ii) permit to occur any Termination Event with respect to a Plan
that would have a Material Adverse Effect in respect of such Borrower.

      (h) Transactions with Related Parties. Make any sale to, make any purchase
from, extend credit to, make payment for services rendered by, or enter into any
other transaction with, or permit any Material Subsidiary of such Borrower to
make any sale to, make any purchase from, extend credit to, make payment for
services rendered by, or enter into any other transaction with, any Related
Party of such Borrower or of such Material Subsidiary, unless as a whole such
sales, purchases, extensions of

                                      -55-
<PAGE>

credit, rendition of services and other transactions are (at the time such sale,
purchase, extension of credit, rendition of services or other transaction is
entered into) on terms and conditions reasonably fair in all material respects
to such Borrower or such Material Subsidiary in the good faith judgment of such
Borrower; provided that the following items will not be deemed to be subject to
the provisions of this Section 5.2(h): (i) declaring or paying any dividend or
distribution or purchasing, redeeming, retiring, defeasing or otherwise
acquiring for value any Equity Interests, in each case not otherwise prohibited
hereunder, (ii) any agreement, instrument or arrangement as in effect on the
date hereof or any amendment thereto or any transaction contemplated thereby
(including pursuant to any amendment thereto) in any replacement agreement
thereto so long as any such amendment or replacement agreement is not more
disadvantageous to the Banks in any material respect than the original agreement
as in effect on the date hereof as determined in good faith by an Authorized
Financial Officer of TWC, or (iii) (A) corporate sharing agreements among a
Borrower and its Subsidiaries with respect to tax sharing and general overhead
and other administrative matters and (B) any other intercompany arrangements
disclosed or described in TWC's report on Form 10-K for the year ended December
31, 2003 (including the exhibits thereto), all as in effect on the date hereof,
and any amendment or replacement of any of the foregoing so long as such
amendment or replacement agreement is not less advantageous to any Borrower
party thereto in any material respect than the agreement so amended or replaced,
as such agreement was in effect on the date hereof.

      (i) Grantors. In the case of TWC, permit, prior to the Collateral Release
Date, WFSGI or any Guarantor other than Pipeline Holdco:

                  (i)   Upon the request of the Collateral Agent, after the
      occurrence and during the continuance of any Event of Default, to cause
      the withdrawal, application or transfer of any financial assets or
      security entitlements with respect to the Pledged Collateral (as such term
      is defined in the Pledge) or give any instructions or entitlement orders
      with respect to them;

                  (ii)  To move or establish its chief executive office in any
      place different from its current location or change its state of
      incorporation or organization without prior notice to the Collateral
      Agent; or

                  (iii) To establish a new location for its chief executive
      office or change its name until it has given to the Collateral Agent not
      less than 10 days' prior written notice of its intention to do so, clearly
      describing such new location or specifying such new name or other name as
      the case may be, and providing such other information in connection
      therewith as Collateral Agent may reasonably request.

      (j) Use of Proceeds. Use any proceeds of any Revolving Credit Advance for
any purpose other than general corporate purposes relating to the business of a
Borrower and its Subsidiaries (including working capital and capital
expenditures), or use any such proceeds in any manner which violates or results
in a violation of law; provided that no proceeds of any Revolving Credit Advance
will be used in any manner which contravenes law, and no proceeds of any
Revolving Credit Advance will be used to purchase or carry any margin stock
(within the meaning of Regulation U issued by the Federal Reserve Board).

      (k) Asset Disposition. In the case of TWC, sell, lease, transfer or
otherwise dispose of, or permit WFSGI or any of the Western Midstream
Subsidiaries to sell, lease, transfer or otherwise dispose of, any Collateral
prior to the Collateral Release Date, except:

                  (i)   sales of inventory (including Hydrocarbons that are
      inventory) and extracted products in the ordinary course of business and
      on reasonable terms;

                                      -56-
<PAGE>

                  (ii)  sales or other dispositions of worn out, uneconomic or
      obsolete assets in the ordinary course of business (for avoidance of
      doubt, excluding receivables and Equity Interests in Western Midstream
      Subsidiaries and Debt of TWC or any Subsidiary of TWC owing to any Western
      Midstream Subsidiary), if no Event of Default exists at the time of such
      sale or other disposition or would result therefrom; provided that
      "uneconomic" assets includes only those assets the sale of which (in the
      reasonable judgment of the Western Midstream Subsidiary making the sale or
      other disposition) could reasonably be expected, after giving effect to
      any contemporaneous replacement thereof, to leave the business and
      operations of such Western Midstream Subsidiary in at least as good a
      position as before such sale or other disposition;

                  (iii) sales or other dispositions of surplus equipment in the
      ordinary course of business, if no Event of Default exists at the time of
      such sale or other disposition or would result therefrom and if the
      aggregate fair market value of all such surplus equipment so sold or
      otherwise disposed does not exceed $25,000,000 during the term of this
      Agreement;

                  (iv)  any trade of Collateral (other than receivables and
      Equity Interests in Western Midstream Subsidiaries and Debt of TWC or any
      Subsidiary of TWC owing to any Western Midstream Subsidiary) by Western
      Midstream Subsidiaries with other Subsidiaries of TWC (other than
      Non-Recourse Subsidiaries and International Subsidiaries) consistent with
      past practice, if (A) taken as a whole over time, the assets received by
      each party in such trade have a comparable fair market value to the assets
      traded by such party, and (B) no Event of Default exists at the time of
      such trade or would result therefrom;

                  (v)   sales of other immaterial Property (other than Equity
      Interests in Western Midstream Subsidiaries and Debt of TWC or any
      Subsidiary of TWC owing to any Western Midstream Subsidiary) in the
      ordinary course of business and on reasonable terms, if no Event of
      Default exists at the time of such sale or would result therefrom;
      provided that property may not be sold pursuant to this clause (v) if the
      aggregate fair market value of all property sold pursuant to this clause
      (v) exceeds $5,000,000 in any year;

                  (vi)  transfers of Collateral by any Western Midstream
      Subsidiary to another Western Midstream Subsidiary in the ordinary course
      of business, if no Event of Default exists at the time of such transfer or
      would result therefrom;

                  (vii) any Permitted Disposition if no Event of Default exists
      at the time of such Permitted Disposition or would result therefrom;

                  (viii) any sale or disposition of any interest in Collateral
      (other than Equity Interests in WGPC, WFSC or WGPWC, Equity Interests in
      any other Western Midstream Subsidiary unless such sale or disposition
      includes 100% of such Subsidiary, and Debt of TWC or any Subsidiary of TWC
      owing to any Western Midstream Subsidiary), if no Event of Default exists
      at the time of such sale or disposition or would result therefrom;
      provided that (A) the amount received by the Person so selling or
      disposing of such Collateral reasonably approximates the fair market value
      of such Collateral, (B) such sale or other disposition is on terms and
      conditions reasonably fair in all material respects to such Western
      Midstream Subsidiary in the good faith judgment of such Borrower, (C) the
      net proceeds of any such sale shall be reinvested in new or existing
      Collateral within twelve months from the date of such sale, and (D) the
      aggregate amount of net proceeds required to be so reinvested, but that
      have not yet been so reinvested, in respect of any Collateral sold or
      disposed of pursuant to this clause (viii) shall not exceed $50,000,000 at
      any time; and

                                      -57-
<PAGE>

                  (ix)  sales or other dispositions in accordance with past
      practice of past due receivables or receivables owed by account debtors
      that are in bankruptcy;

      provided that with respect to any Collateral traded or transferred (in the
      case of clauses (iv) and (vi) only), or any non-cash proceeds received
      from the sale, transfer or other disposition of Collateral, or any
      Collateral purchased with the net proceeds received from a sale or other
      disposition pursuant to clause (viii), in each case pursuant to this
      Section 5.2(k), such Borrower shall undertake all actions as more fully
      set forth in, and subject to, Sections 5.1(f) and 5.1(g) to (1) grant an
      Acceptable Security Interest on any new Collateral resulting from any such
      trade or transfer or on such non-cash proceeds and (2) in the case of
      Collateral transferred pursuant to clause (vi), to maintain an Acceptable
      Security Interest on such transferred Collateral.

      To the extent any Collateral is sold or otherwise disposed as permitted by
      this Section 5.2(k), such Collateral (unless sold or disposed to TWC or
      any of its Subsidiaries pursuant to any provision of this Section 5.2(k)
      other than clause (iv)) shall be sold or disposed free and clear of the
      Liens created by the Security Documents (which Liens shall be deemed to be
      automatically released upon such permitted sale or permitted disposition),
      and the Collateral Agent shall be authorized to take any actions deemed
      appropriate by it in order to effect the foregoing. Without limiting the
      foregoing, promptly upon the request of the Borrowers, at TWC's expense,
      the Collateral Agent will take such action and execute and deliver such
      instruments and documents necessary to release the liens and security
      interests created by the Security Documents on the Collateral sold or
      otherwise disposed of in accordance with this Section 5.2(k), in form and
      substance reasonably satisfactory to the Collateral Agent.

For avoidance of doubt it is expressly agreed that this Section 5.2(k) shall not
prohibit the Western Midstream Subsidiaries from using cash and cash equivalents
in the ordinary course of business.

      (l) Restricted Payments. (i) Declare or pay any dividends (other than in
common stock of such Borrower), purchase, redeem, retire, defease or otherwise
acquire for value any of its Equity Interests now or hereafter outstanding,
return any capital to its stockholders, partners or members (or the equivalent
Persons thereof) as such, make any other distribution of assets, Equity
Interests, obligations or securities to its stockholders, partners or members
(or the equivalent Persons thereof) as such, or permit Pipeline Holdco to do any
of the foregoing, or (ii) permit any of its Subsidiaries to purchase, redeem,
retire, defease or otherwise acquire for value any Equity Interests in any
Borrower or Pipeline Holdco, unless no Event of Default shall have occurred and
be continuing at the time of any action described in clauses (i) and (ii) above
and no Event of Default would result therefrom; provided, that, notwithstanding
the foregoing, at any time, whether or not an Event of Default exists, TGPL and
NWP shall be permitted to pay dividends to Pipeline Holdco to permit Pipeline
Holdco to (1) pay corporate overhead expenses incurred in the ordinary course of
business not to exceed $2,000,000 in any fiscal year, (2) (and Pipeline Holdco
shall be permitted to) pay dividends to TWC to pay the corporate overhead and
administration expenses allocated (in a manner consistent with past practices)
to Pipeline Holdco, TGPL, NWP and their Subsidiaries, and (3) pay any taxes
which are due and payable by Pipeline Holdco, TGPL and NWP as part of a
consolidated group.

      (m) Subsidiary Debt. Permit prior to the Collateral Release Date, (i) any
Western Midstream Subsidiary to create, incur, assume or suffer to exist any
Debt or preferred Equity Interests except (A) the Obligations, (B) Debt in an
aggregate amount (for all Western Midstream Subsidiaries) not to exceed
$50,000,000 at any time outstanding, and (C) Debt owed to TWC or any of its
Subsidiaries if such Debt is evidenced by a promissory note that is delivered to
the Collateral Agent and in which an Acceptable Security Interest exists, or
(ii) Pipeline Holdco to create, incur, assume or suffer to exist any Debt,
except

                                      -58-
<PAGE>

(A) Debt in an aggregate amount not to exceed $150,000,000 at any time
outstanding and (B) Debt owed to TWC or any of its Subsidiaries if all such Debt
is evidenced by a promissory note that is delivered to the Collateral Agent and
in which an Acceptable Security Interest exists.

      (n) Non-Recourse Debt. Create, incur or assume, or permit any of its
Subsidiaries to create, incur or assume, any Non-Recourse Debt, unless, at the
time of such creation, incurrence or assumption and immediately after giving
effect thereto, both (i) the aggregate principal amount of all Non-Recourse Debt
of all Subsidiaries of such Borrower does not exceed 10% of the total
Consolidated assets of such Borrower and its Consolidated Subsidiaries; and (ii)
the aggregate principal amount of all Non-Recourse Debt of all Subsidiaries of
such Borrower that is secured by assets owned by such Borrower or its
Subsidiaries or by either of the other Borrowers or their respective
Subsidiaries (without duplication), on December 31, 2003 or by Equity Interests
in any Person that owns any such asset or that is otherwise supported by such
assets does not exceed 7.5% of the total Consolidated assets of such Borrower
and its Consolidated Subsidiaries, as shown on the respective balance sheets of
the Borrowers delivered pursuant to Section 4.1(e).

                                   ARTICLE VI

                                EVENTS OF DEFAULT

      SECTION 6.1. Events of Default. If any of the following events ("Events of
Default") shall occur and be continuing:

      (a) Any Borrower (i) shall fail to pay any Reimbursement Obligation owed
by it when the same becomes due and payable, (ii) shall fail to pay any
principal of any Revolving Credit Advance owed by it or any Note executed by it
when the same becomes due and payable, (iii) shall fail to pay any interest owed
by it on any Reimbursement Obligation, Revolving Credit Advance or Note within
five days after the same becomes due and payable or (iv) shall fail to pay any
fee or other amount presented in writing to be paid by it hereunder or under any
Credit Document to which it is a party within ten days after the same becomes
due and payable; or

      (b) Any certification, representation or warranty made by any Credit Party
herein or in any other Credit Document or by any Credit Party (or any Authorized
Officer of any Credit Party) in writing under or in connection with this
Agreement or any other Credit Document or any instrument executed in connection
herewith (including representations and warranties deemed made pursuant to
Section 3.2) shall prove to have been incorrect in any material respect when
made or deemed made; or

      (c) Any Credit Party shall fail to perform or observe (i) any term,
covenant or agreement contained in this Agreement (other than a term, covenant
or agreement contained in Section 5.2), any Note or any other Credit Document on
its part to be performed or observed and such failure shall continue for 30 days
after the earlier of the date notice thereof shall have been given to TWC by the
Agent or any Bank or the date an Authorized Officer of such Credit Party shall
have knowledge of such failure or (ii) any term, covenant or agreement contained
in Section 5.2; or

      (d) Any Borrower or any Subsidiary of any Borrower (other than a
Non-Recourse Subsidiary or an International Subsidiary) shall fail to pay any
principal of or premium or interest on any Debt which is outstanding in a
principal amount of at least $100,000,000 in the aggregate (excluding Debt
incurred pursuant to any Revolving Credit Advance) of such Borrower or any
Subsidiary of such Borrower (as the case may be) (other than a Non-Recourse
Subsidiary or an International Subsidiary), when the same becomes due and
payable (whether by scheduled maturity, required prepayment, acceleration,
demand or otherwise), and such failure shall continue after the applicable grace
period, if any, specified in the

                                      -59-
<PAGE>

agreement or instrument relating to such Debt; or any other event shall occur or
condition shall exist under any agreement or instrument relating to any such
Debt and shall continue after the applicable grace period, if any, specified in
such agreement or instrument, if the effect of such event or condition is to
accelerate the maturity of such Debt; or any such Debt shall be declared to be
due and payable, or required to be prepaid (other than (i) by a regularly
scheduled required prepayment, (ii) as required in connection with any permitted
sale of assets, (iii) as required in connection with any casualty or
condemnation or (iv) as required pursuant to an illegality event of the type set
forth in Section 2.16), prior to the stated maturity thereof; provided, however,
that the provisions of this Section 6.1(d) shall not apply to any Non-Recourse
Debt or International Debt or any Non-Recourse Subsidiary or International
Subsidiary; or

      (e) Any Borrower or any Material Subsidiary of any Borrower shall
generally not pay its debts as such debts become due, or shall admit in writing
its inability to pay its debts generally, or shall make a general assignment for
the benefit of creditors; or any proceeding shall be instituted by or against
any Borrower or any Material Subsidiary of any Borrower seeking to adjudicate it
a bankrupt or insolvent, or seeking liquidation, winding up, reorganization,
arrangement, adjustment, protection, relief, or composition of it or its debts
under any law relating to bankruptcy, insolvency or reorganization or relief of
debtors, or seeking the entry of an order for relief or the appointment of a
receiver, trustee, or other similar official for it or for any substantial part
of its property and, in the case of any such proceeding instituted against it
(but not instituted by it), shall remain undismissed or unstayed for a period of
60 days; or any Borrower or any Material Subsidiary of any Borrower shall take
any action to authorize any of the actions set forth above in this subsection
(e) (for the avoidance of doubt, Non-Recourse Subsidiaries and International
Subsidiaries are not subject to this clause (e)); or

      (f) One or more judgments or orders for the payment of money in excess of
$100,000,000 in the aggregate (to the extent not paid or to the extent not
covered by insurance or indemnities that TWC, in its reasonable good faith
judgment, believes will be paid when due by the parties providing such
indemnities or insurance) shall be rendered against any Borrower or any Material
Subsidiary of any Borrower and remain unsatisfied and either (i) enforcement
proceedings shall have been commenced by any creditor upon such judgment or
order or (ii) there shall be any period of 30 consecutive days during which a
stay of enforcement of such judgment or order, by reason of a pending appeal or
otherwise, shall not be in effect (for the avoidance of doubt, Non-Recourse
Subsidiaries and International Subsidiaries are not subject to this clause (f));
or

      (g) Any Termination Event with respect to a Plan shall have occurred and,
30 days after notice thereof shall have been given to any Borrower by the Agent,
(i) such Termination Event shall still exist and (ii) the sum (determined as of
the date of occurrence of such Termination Event) of the Insufficiency of such
Plan and the Insufficiency of any and all other Plans with respect to which a
Termination Event shall have occurred and then exist (or in the case of a Plan
with respect to which a Termination Event described in clause (ii) of the
definition herein of Termination Event shall have occurred and then exist, the
liability related thereto) is equal to or greater than $125,000,000; or

      (h) Any Credit Party or any Subsidiary or ERISA Affiliate of any Credit
Party shall have been notified by the sponsor of a Multiemployer Plan that it
has incurred Withdrawal Liability to such Multiemployer Plan in an amount which,
when aggregated with all other amounts required to be paid to Multiemployer
Plans in connection with Withdrawal Liabilities (determined as of the date of
such notification), exceeds $125,000,000 in the aggregate;

      (i) Any Credit Party or any Subsidiary or ERISA Affiliate of any Credit
Party shall have been notified by the sponsor of a Multiemployer Plan that such
Multiemployer Plan is in reorganization or is being terminated, within the
meaning of Title IV of ERISA, if as a result of such reorganization or

                                      -60-
<PAGE>

termination the aggregate annual contributions of the Credit Parties and their
respective ERISA Affiliates to all Multiemployer Plans which are then in
reorganization or being terminated have been or will be increased over the
amounts contributed to such Multiemployer Plans for the respective plan years
which include the date hereof by an amount exceeding $125,000,000;

      (j) Prior to the Collateral Release Date, any Security Document or any
Guaranty for any reason is not a legal, valid, binding and enforceable
obligation of any Credit Party thereto or any Credit Party shall so state in
writing;

      (k) Prior to the Collateral Release Date, any material portion of the
Collateral that is not covered by adequate insurance shall be destroyed or any
material portion of the Collateral shall otherwise become unavailable for use by
its owner for a period in excess of 90 days or title to any material portion of
the Collateral shall be successfully challenged; or

      (l) A Change of Control Event shall occur;

then, and in any such event, the Agent while such event exists (i) shall at the
request, or may with the consent, of the Majority Banks, by notice to the
Borrowers, declare the Commitments of each Bank and of each Issuing Bank and the
obligations of each Issuing Bank to issue any Letter of Credit and each Bank to
make Revolving Credit Advances to be terminated, whereupon each Commitment and
each such obligation shall forthwith terminate, and (ii) shall at the request,
or may with the consent, of the Majority Banks, by notice to the Borrower as to
which an Event of Default exists, declare the principal of the Reimbursement
Obligations and Revolving Credit Advances owed by such Borrower, all interest
thereon and all other amounts payable by such Borrower under this Agreement and
any other Credit Document to be forthwith due and payable, whereupon all such
amounts shall become and be forthwith due and payable, without requirement of
any presentment, demand, protest, notice of intent to accelerate, further notice
of acceleration or other further notice of any kind (other than the notice
expressly provided for above), all of which are hereby expressly waived by the
Borrowers; provided, however, that in the event of any Event of Default
described in Section 6.1(e), (A) the Commitments of each Bank and of each
Issuing Bank and the obligations of each Issuing Bank to issue a Letter of
Credit and each Bank to make Revolving Credit Advances shall automatically be
terminated and (B) the principal of the Reimbursement Obligations and Revolving
Credit Advances, all such interest and all such other amounts shall
automatically become and be due and payable, without presentment, demand,
protest, notice of intent to accelerate, notice of acceleration or any other
notice of any kind, all of which are hereby expressly waived by the Borrowers.
For purposes of this Section 6.1, any Reimbursement Obligation or Revolving
Credit Advances owed to an SPC shall be deemed to be owed to its Designating
Bank.

      SECTION 6.2. LC Cash Collateral Accounts. Upon the occurrence and during
the continuance of any Event of Default that exists as to any Borrower (if the
Agent has declared all amounts owed by such Borrower hereunder to be due and
payable), such Borrower agrees that it shall forthwith, without any demand or
the taking of any other action by any Issuing Bank, the Agent, or any of the
Banks, provide cover for the outstanding Letter of Credit Liabilities in respect
of Letters of Credit issued at the request of such Borrower by paying to the
Agent immediately available funds in the amount equal to the then aggregate
Available Amounts of all outstanding Letters of Credit issued at the request of
such Borrower, which funds shall be deposited into a blocked deposit account or
accounts to be established and maintained at the office of Citibank (or an
affiliate thereof) in the name of the Agent as collateral security for any
outstanding Letter of Credit Liabilities in respect of Letters of Credit issued
at the request of such Borrower (the "LC Cash Collateral Accounts" in respect of
such Borrower). Each Borrower hereby pledges, and grants to the Agent for the
ratable benefit of each Issuing Bank and the Banks, a security interest in all
funds held in the LC Cash Collateral Accounts in respect of such Borrower from
time to time and all proceeds thereof, as security for the payment of the
outstanding Letter of Credit Liabilities in

                                      -61-
<PAGE>

respect of Letters of Credit issued at the request of such Borrower. The Agent
shall from time to time withdraw funds then held in the LC Cash Collateral
Accounts in respect of any Borrower to satisfy the payment of any Reimbursement
Obligations owing by such Borrower to any Issuing Bank as shall have become or
shall become due and payable by such Borrower to such Issuing Bank under this
Agreement in connection with the Letters of Credit issued at the request of such
Borrower. The Agent shall exercise reasonable care in the custody and
preservation of any funds held in the LC Cash Collateral Accounts and shall be
deemed to have exercised such care if such funds are accorded treatment
substantially equivalent to that which the Agent accords its own property, it
being understood that the Agent shall not have any responsibility for taking any
necessary steps to preserve rights against any parties with respect to any such
funds or for investing such funds. If at any time (a) no Event of Default exists
and (b) the funds in the LC Cash Collateral Accounts in respect of any Borrower
exceed the aggregate amount of all Letter of Credit Liabilities in respect of
Letters of Credit issued at the request of such Borrower, the Agent shall, upon
request of such Borrower, return such excess to such Borrower.

                                  ARTICLE VII

               THE AGENT; THE COLLATERAL AGENT; AND ISSUING BANKS

      SECTION 7.1. Agent's and Collateral Agent's Authorization and Action. Each
of the Banks and Issuing Banks hereby appoints and authorizes the Agent and the
Collateral Agent to take such action respectively as agent and collateral agent
on its behalf and to exercise such powers under this Agreement and the other
Credit Documents as are delegated respectively to the Agent and to the
Collateral Agent by the terms hereof and thereof, together with such powers as
are reasonably incidental thereto. As to any matters not expressly provided for
by the Credit Documents (including enforcement of the terms of this Agreement or
collection of the Reimbursement Obligations or Notes, fees and any other amounts
due and payable pursuant to this Agreement), neither the Agent nor the
Collateral Agent shall be required to exercise any discretion or take any
action, but shall be required to act or to refrain from acting (and shall be
fully protected in so acting or refraining from acting) upon the instructions of
the Majority Banks, and such instructions shall be binding upon all Banks and
all holders of Notes; provided, however, that neither the Agent nor the
Collateral Agent shall be required to take any action which exposes the Agent or
the Collateral Agent to personal liability or which is contrary to the Credit
Documents or applicable law. The Agent and the Collateral Agent agree to give to
each Bank prompt notice of each notice given to it by any Borrower pursuant to
the terms of this Agreement or any other Credit Document. The Agent will
promptly furnish to each Bank all items furnished to the Agent pursuant to
Section 5.1(b).

      SECTION 7.2. Agent's and Collateral Agent's Reliance, Etc. Neither the
Agent nor the Collateral Agent nor any of their respective directors, officers,
agents or employees shall be liable for any action taken or omitted to be taken
by them or under or in connection with this Agreement, except for its or their
own gross negligence or willful misconduct. Without limitation of the generality
of the foregoing, the Agent and the Collateral Agent: (i) may consult with legal
counsel (including counsel for any Borrower), independent public accountants and
other experts selected by them and shall not be liable for any action taken or
omitted to be taken in good faith by them in accordance with the advice of such
counsel, accountants or experts; (ii) make no warranty or representation to any
Bank or Issuing Bank and shall not be responsible to any Bank of Issuing Bank
for any statements, warranties or representations (whether written or oral) made
in or in connection with this Agreement or any other Credit Document; (iii)
shall not have any duty to ascertain or to inquire as to the satisfaction,
performance or observance of any of the terms, covenants or conditions of this
Agreement or any other Credit Document on the part of any Credit Party or to
inspect the property (including the books and records) of any Credit Party; (iv)
shall not be responsible to any Bank for the due execution, legality, validity,
enforceability, genuineness, sufficiency or value of this Agreement, any other
Credit Document or any other instrument or document furnished pursuant hereto or
thereto; (v) shall incur no liability under or in respect of any Credit

                                      -62-
<PAGE>

Document by acting upon any notice, consent, certificate or other instrument or
writing (which may be by telecopier, telegram, cable or telex) believed by
either of them in its reasonable judgment to be genuine and signed or sent by
the proper party or parties; (vi) may treat any Issuing Bank that issues or has
issued a Letter of Credit as being the issuer of such Letter of Credit for all
purposes and (vii) may treat a Bank as the obligee of any Revolving Credit
Advance or, if applicable, the payee of any Note as the holder thereof, until
the Agent receives and accepts a Transfer Agreement executed by a Borrower (if
required pursuant to Section 8.5), the assignor Bank and the assigning Bank
pursuant to Section 8.5. Without limiting the generality of the foregoing,
insofar as the Agent is concerned, for purposes of determining compliance with
Section 3.2 with respect to any Revolving Credit Advance, each Bank shall be
deemed to have consented to, approved and accepted and to be satisfied with each
matter required under Section 3.2, unless the officer of the Agent responsible
for the transactions contemplated by the Credit Documents shall have received
written notice from such Bank prior to such Revolving Credit Advance specifying
its objection thereto and such Bank shall not have made available to the Agent
any portion of such Revolving Credit Advance; provided that this sentence is
solely for the benefit of the Agent (and not any Credit Party) and shall not
amend, waive or otherwise modify Section 3.2, Section 6.1(b) or any other
provision applicable to any Credit Party, whether in respect of such Revolving
Credit Advance or any other Revolving Credit Advance or matter.

      SECTION 7.3. Issuing Banks' Reliance, Etc. Neither the Issuing Banks nor
any directors, officers, agents or employees of the Issuing Banks shall be
liable for any action taken or omitted to be taken by any of them under or in
connection with this Agreement, except for its or their own gross negligence or
willful misconduct. The Issuing Banks shall not have, by reason of this
Agreement a fiduciary relationship in respect of any Bank; and nothing in this
Agreement, expressed or implied, is intended or shall be so construed as to
impose upon the Issuing Banks any obligations in respect of this Agreement
except as expressly set forth herein. Without limitation of the generality of
the foregoing, the Issuing Banks: (i) may consult with legal counsel (including
counsel for any Borrower), independent public accountants and other experts
selected by it and shall not be liable for any action taken or omitted to be
taken in good faith by it in accordance with the advice of such counsel,
accountants or experts; (ii) make no warranty or representation to any Bank or
Issuing Bank and shall not be responsible to any Bank or Issuing Bank for any
statements, warranties or representations (whether written or oral) made in or
in connection with this Agreement or any other Credit Document; (iii) shall not
have any duty to ascertain or to inquire as to the satisfaction, performance or
observance of any of the terms, covenants or conditions of this Agreement or any
other Credit Document on the part of any Credit Party or to inspect the property
(including the books and records) of any Credit Party; (iv) shall not be
responsible to any Bank for the due execution, legality, validity,
enforceability, genuineness, sufficiency or value of this Agreement or any other
Credit Document or any other instrument or document furnished pursuant hereto or
thereto; and (v) shall incur no liability under or in respect of any Credit
Document by acting upon any notice, consent, certificate or other instrument or
writing (which may be by telecopier, telegram, cable or telex) believed by any
of them in its reasonable judgment to be genuine and signed or sent by the
proper party or parties. Without limiting the generality of the foregoing,
insofar as each Issuing Bank is concerned, for purposes of determining
compliance with Section 3.2 with respect to any issuance or increase of any
Letter of Credit, each Bank shall be deemed to have consented to, approved and
accepted and to be satisfied with each matter required under Section 3.2, unless
the officer of such Issuing Bank responsible for the transactions contemplated
by the Credit Documents shall have received written notice from such Bank prior
to such issuance or increase specifying its objection thereto and such Bank
shall not have accepted after such issuance or increase any Letter of Credit Fee
associated with such increase or, in the case of an issuance of any Letter of
Credit, associated with such Letter of Credit; provided that this sentence is
solely for the benefit of the Issuing Banks (and not any Credit Party) and shall
not amend, waive or otherwise modify Section 3.2, Section 6.1(b) or any other
provision applicable to any Credit Party, whether in respect of such Letter of
Credit or any other Letter of Credit or matter.

                                      -63-
<PAGE>

      SECTION 7.4. Rights. With respect to its Commitments, the Revolving Credit
Advances made by it and the Notes, if any, issued to it, or any Letter of Credit
Interest held by it, CUSA shall have the same rights and powers under any such
Note and the other Credit Documents as any other Bank and may exercise the same
as though it was not the Agent and Collateral Agent. With respect to its Letter
of Credit Commitments, the Reimbursement Obligations owed to it or any Letter of
Credit Interest held by it, the Issuing Banks shall have the same rights and
powers under this Agreement as any other Bank and may exercise the same as
though it was not an Issuing Bank, as the case may be. CUSA, each Issuing Bank
and the respective affiliates of each may accept deposits from, lend money to,
act as trustee under indentures of, and generally engage in any kind of business
with, any Borrower, any Person who may do business with or own, directly or
indirectly, securities of any Borrower and any other Person, all as if CUSA were
not the Agent and Collateral Agent and each Issuing Bank was not an Issuing
Bank, in each case without any duty to account therefor to the Banks or the
Issuing Banks.

      SECTION 7.5. Indemnification. (a) The Banks agree to indemnify the Agent
and the Collateral Agent (to the extent not reimbursed by the Borrowers),
ratably according to the respective Letter of Credit Interests then held by each
of them plus the respective principal amounts of the Revolving Credit Advances
owed to each of them (or if no Letter of Credit Interests or Revolving Credit
Advances are at the time outstanding, ratably according to their respective
Revolving Credit Commitments for TWC (or, if such Commitments have terminated,
their respective Revolving Credit Commitments for TWC immediately prior to such
termination)), from and against any and all claims, damages, losses, liabilities
and expenses (including reasonable fees and disbursements of external counsel)
of any kind or nature whatsoever which may be imposed on, incurred by, or
asserted against either the Agent or the Collateral Agent in any way relating to
or arising out of this Agreement or any other Credit Document or any action
taken or omitted by the Agent or the Collateral Agent under this Agreement or
any other Credit Document, including any of the foregoing incurred in connection
with any action taken under Section 5.1(h) (EXPRESSLY INCLUDING ANY SUCH CLAIM,
DAMAGE, LOSS, LIABILITY OR EXPENSE ATTRIBUTABLE TO THE ORDINARY, SOLE OR
CONTRIBUTORY NEGLIGENCE OF THE AGENT OR THE COLLATERAL AGENT, BUT EXCLUDING ANY
SUCH CLAIM, DAMAGE, LOSS, LIABILITY OR EXPENSE ATTRIBUTABLE TO THE GROSS
NEGLIGENCE OR WILLFUL MISCONDUCT OF THE AGENT AND THE COLLATERAL AGENT). IT IS
THE INTENT OF THE PARTIES HERETO THAT EACH OF THE AGENT AND THE COLLATERAL AGENT
SHALL, TO THE EXTENT PROVIDED IN THIS SECTION 7.5, BE INDEMNIFIED FOR ITS OWN
ORDINARY, SOLE OR CONTRIBUTORY NEGLIGENCE. Without limitation of the foregoing,
each Bank agrees to reimburse the Agent and the Collateral Agent promptly upon
demand for their respective ratable shares of any out-of-pocket expenses
(including external counsel fees) incurred respectively by the Agent or the
Collateral Agent in connection with the preparation, execution, delivery,
administration, modification, amendment or enforcement (whether through
negotiations, legal proceedings or otherwise) of, or legal advice in respect of
rights or responsibilities under, this Agreement or any other Credit Document to
the extent that the Agent and the Collateral Agent are not reimbursed for such
expenses by the Borrowers.

      (b) The Banks agree to indemnify each Issuing Bank (to the extent not
reimbursed by the Borrowers), ratably according to the respective Letter of
Credit Interests then held by each of them plus the respective principal amounts
of the Revolving Credit Advances owed to each of them (or if no Letter of Credit
Interests or Revolving Credit Advances are at the time outstanding, ratably
according to their respective Revolving Credit Commitments for TWC (or, if such
Commitments have terminated, their respective Revolving Credit Commitments for
TWC immediately prior to such termination)), from and against any and all
claims, damages, losses, liabilities and expenses (including reasonable fees and
disbursements of external counsel) of any kind or nature whatsoever which may be
imposed on, incurred by, or asserted against any Issuing Bank in any way
relating to or arising out of this Agreement or any other Credit Document or any
action taken or omitted by any Issuing Bank under this Agreement or any

                                      -64-
<PAGE>

other Credit Document (EXPRESSLY INCLUDING ANY SUCH CLAIM, DAMAGE, LOSS,
LIABILITY OR EXPENSE ATTRIBUTABLE TO THE ORDINARY, SOLE OR CONTRIBUTORY
NEGLIGENCE OF ANY ISSUING BANK, BUT EXCLUDING ANY SUCH CLAIM, DAMAGE, LOSS,
LIABILITY OR EXPENSE ATTRIBUTABLE TO THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT
OF SUCH ISSUING BANK). IT IS THE INTENT OF THE PARTIES HERETO THAT AN ISSUING
BANK SHALL, TO THE EXTENT PROVIDED IN THIS SECTION 7.5, BE INDEMNIFIED FOR ITS
OWN ORDINARY, SOLE OR CONTRIBUTORY NEGLIGENCE. Without limitation of the
foregoing, each Bank agrees to reimburse each Issuing Bank promptly upon demand
for its ratable share of any out-of-pocket expenses (including external counsel
fees) incurred by such Issuing Bank in connection with the preparation,
execution, delivery, administration, modification, amendment or enforcement
(whether through renegotiations, legal proceedings or otherwise) of, or legal
advice in respect of rights or responsibilities under this Agreement or any
other Credit Document to the extent that such Issuing Bank is not reimbursed for
such expenses by the Borrowers.

      SECTION 7.6. Successor Agent and Collateral Agent. The Agent and
Collateral Agent may resign at any time respectively as Agent and Collateral
Agent under this Agreement by giving written notice thereof to the Banks and the
Borrowers and may be removed at any time with or without cause by the Majority
Banks; provided, however that any removal of the Agent will not be effective
until it has also been replaced as Collateral Agent. Upon any such resignation
or removal, the Majority Banks shall have the right to appoint, with the consent
of the Borrowers (which consent shall not be unreasonably withheld and shall not
be required if an Event of Default under Section 6.1(a) or 6.1(e) exists), a
successor Agent and Collateral Agent from among the Banks. If no successor Agent
and Collateral Agent shall have been so appointed by the Majority Banks with
such consent, and shall have accepted such appointment, within 30 days after the
respective retiring Agent's or Collateral Agent's giving of notice of
resignation or the Majority Banks' removal of the retiring Agent or Collateral
Agent, then the retiring Agent or Collateral Agent may, on behalf of the Banks,
appoint respectively a successor Agent or Collateral Agent, which shall be a
Bank which is a commercial bank organized under the laws of the United States of
America or of any State thereof and having a combined capital and surplus of at
least $500,000,000. Upon the acceptance of any appointment as Agent or
Collateral Agent under this Agreement by respectively a successor Agent or
Collateral Agent, such successor Agent or Collateral Agent shall thereupon
succeed to and become vested with all the rights, powers, privileges and duties
of the retiring Agent or Collateral Agent and shall function as the Agent or
Collateral Agent under this Agreement, and the retiring Agent or Collateral
Agent shall be discharged from its duties and obligations as Agent or Collateral
Agent under this Agreement. After any retiring Agent's or Collateral Agent's
resignation or removal hereunder respectively as Agent or Collateral Agent, the
provisions of this Article VII shall inure to its benefit as to any actions
taken or omitted to be taken by it while it was Agent or Collateral Agent under
this Agreement.

      SECTION 7.7. Bank Credit Decision. Each of the Banks and Issuing Banks
acknowledges that it has, independently and without reliance upon the Collateral
Agent, the Agent, the Syndication Agent, the Joint Lead Arrangers, the Issuing
Banks or any other Bank and based on the financial statements referred to in
Section 4.1(e) and such other documents and information as it has deemed
appropriate, made its own credit analysis and decision to enter into this
Agreement. Each of the Banks and Issuing Banks and the other beneficiaries of
any Security Document (both on its own behalf and on behalf of any of its
Affiliates that is a beneficiary of any Security Document) also acknowledges
that it will, independently and without reliance upon the Collateral Agent, the
Agent, the Syndication Agent, the Joint Lead Arrangers, the Issuing Banks or any
other Bank and based on such documents and information as it shall deem
appropriate at the time, continue to make its own credit decisions in taking or
not taking action under this Agreement and the other Credit Documents. The
Collateral Agent shall not have any duty or responsibility, either initially or
on a continuing basis, to provide any Person with any credit or other

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<PAGE>

information, whether coming into its possession before the issuance of any
Letter of Credit or making of any Revolving Credit Advance or at any time or
times thereafter.

      SECTION 7.8. Certain Rights of the Collateral Agent. If the Collateral
Agent shall request instructions from the Majority Banks with respect to any act
or action (including failure to act) in connection with this Agreement or any
other Credit Document, the Collateral Agent shall be entitled to refrain from
such act or taking such action unless and until the Collateral Agent shall have
received instructions from the Majority Banks; and it shall not incur liability
to any Person by reason of so refraining. Without limiting the foregoing, no
Bank nor any Issuing Bank nor any beneficiary of any Security Document shall
have any right of action whatsoever against the Collateral Agent as a result of
its acting or refraining from acting hereunder or under any other Credit
Document in accordance with the instructions of the Majority Banks. Furthermore,
except for action expressly required of the Collateral Agent hereunder, the
Collateral Agent shall in all cases be fully justified in failing or refusing to
act hereunder unless it shall be specifically indemnified to its satisfaction by
the Banks against any and all liability and expense which may be incurred by it
by reason of taking or continuing to take any such action.

      SECTION 7.9. Other Agents. The Syndication Agent, the Co-Documentation
Agents and the Joint Lead Arrangers have no duties or obligations under any
Credit Document. None of the Syndication Agent, the Co-Documentation Agents or
the Joint Lead Arrangers shall have, by reason of this Agreement or the other
Credit Documents, a fiduciary relationship in respect of any Bank or any Issuing
Bank, and nothing in this Agreement or other Credit Documents, express or
implied, is intended or shall be so construed to impose on any of the
Syndication Agent, the Co-Documentation Agents or the Joint Lead Arrangers any
obligation in respect of this Agreement or other Credit Documents.

                                  ARTICLE VIII

                                  MISCELLANEOUS

      SECTION 8.1. Amendments, Etc. No amendment or waiver of any provision of
this Agreement, nor consent to any departure by any Borrower therefrom, shall in
any event be effective unless the same shall be in writing and signed by the
Majority Banks and the Borrowers, and then such waiver or consent shall be
effective only in the specific instance and for the specific purpose for which
given; provided, however, that no amendment, waiver or consent shall, unless in
writing and signed by all the Banks directly affected thereby (it being
understood that all Banks are directly affected by clauses (a), (f), (g), (h)
and (i) below), do any of the following: (a) waive any of the conditions
specified in Section 3.1, (b) increase or extend the scheduled termination date
of any Commitment of any Bank or any Issuing Bank or subject any Bank or any
Issuing Bank to any additional obligation, (c) reduce the Reimbursement
Obligations, (d) reduce the principal of, or interest on, the Revolving Credit
Advances or any fees or other amounts payable hereunder, (e) postpone any date
fixed for any payment of the Reimbursement Obligations, Revolving Credit
Advances or any fees or other amounts payable hereunder, (f) change the
definition of Majority Banks or otherwise change the LC Participation
Percentages, the percentage of the Commitments or of the aggregate unpaid
principal amount of the Revolving Credit Advances, Letter of Credit Liabilities
or the Reimbursement Obligations which shall be required for the Banks or any of
them to take any action under this Agreement, (g) release all or substantially
all of the Collateral, except as set forth in Section 2.2(k), 5.2(k), 6.2 or
8.15, or release Pipeline Holdco, WGPC, WFSC or WGPWC from their respective
Guaranties, except as set forth in Section 8.15 and except for the release of
WGPC, WFSC or WGPWC ("terminated entity") occurring in connection with the
merger, consolidation or liquidation of such terminated entity with or into
WGPC, WFSC or WGPWC ("continuing entity") so long as the Guaranty of such
continuing entity continues, (h) amend, waive any provision of, or consent to
any departure by any Borrower from Section 2.9, this Section 8.1 or Section

                                      -66-
<PAGE>

8.15, or (i) increase the aggregate amount of the Revolving Credit Commitments
for TWC or the Letter of Credit Commitments above $1,500,000,000; and provided
further that no amendment, waiver or consent shall, unless in writing and signed
by the Agent in addition to the Banks required above to take such action, affect
the rights or duties of the Agent under any Credit Document; and provided
further that no amendment, waiver or consent shall, unless in writing and signed
by each Issuing Bank in addition to the Banks required above to take such
action, affect the rights or duties of any Issuing Bank under any Credit
Document; and provided further that no amendment, waiver or consent shall,
unless in writing and signed by the Collateral Agent in addition to the Banks
required above to take such action, affect the rights or duties of the
Collateral Agent under any Credit Document.

      SECTION 8.2. Notices, Etc. (a) Except as otherwise provided in Section
8.2(b), all notices and other communications provided for hereunder shall be in
writing (including telecopy communication) and mailed, telecopied or delivered,
if to any Bank, as specified opposite its name on Schedule I hereto or specified
in a Transfer Agreement for any assignee Bank delivered pursuant to Section
8.5(a) or in a Revolving Credit Commitment Increase Agreement delivered pursuant
to Section 2.19; if to a Borrower, as specified opposite its name on Schedule II
hereto; if to an Issuing Bank to its address as specified opposite its name on
Schedule I or in a Letter of Credit Commitment Increase Agreement delivered
pursuant to Section 2.19; if to CUSA, as Agent or Collateral Agent, to its
address at 2 Penns Way, Suite 200, New Castle, Delaware 19720 (telecopier
number: (302) 894-6120; email address: oploanswebadmin@citigroup.com),
Attention: Williams Account Officer, with a copy to Citicorp North America,
Inc., 333 Clay Street, Suite 3700, Houston, Texas 77002 (telecopier number:
(713) 654-2849), Attention: The Williams Companies, Inc. Account Officer; or, as
to any Borrower, any Issuing Bank, the Collateral Agent, or the Agent, at such
other address as shall be designated by such party in a written notice to the
other parties and, as to each other party, at such other address as shall be
designated by such party in a written notice to the Borrowers, each Issuing
Bank, the Collateral Agent and the Agent; provided that materials required to be
delivered pursuant to Section 5.1(b)(ii), (iii) and (iv) shall be delivered to
the Agent as specified in Section 8.2(b) or as otherwise specified to any
Borrower by the Agent; provided, further, that any communication that (A)
relates to a request for a new, or a conversion of an existing, borrowing or
other extension of credit (including any election of an interest rate or
Interest Period relating thereto), (B) relates to the payment of any principal
or other amount due under the Credit Agreement prior to the scheduled date
therefor, (C) provides notice of any Default or Event of Default or (D) is
required to be delivered to satisfy any condition precedent to the effectiveness
of any provision of this Agreement and/or any borrowing, Letter of Credit,
increase of any Letter of Credit or other extension of credit hereunder, shall
be in writing (including telecopy communication) and mailed, telecopied or
delivered pursuant to this Section 8.2(a). All such notices and communications
shall, when mailed, telecopied or e-mailed, be effective when received in the
mail, sent by telecopier to any party to the telecopier number as set forth
herein or on Schedule I or Schedule II or specified in a Transfer Agreement for
any assignee Bank delivered pursuant to Section 8.5(a) or in a Revolving Credit
Commitment Increase Agreement or Letter of Credit Commitment Increase Agreement
delivered pursuant to Section 2.19 (or other telecopy number specified by such
party in a written notice to the other parties hereto) or confirmed by e-mail,
respectively, except that notices and communications to the Agent shall not be
effective until received by the Agent. Any notice or communication to a Bank
shall be deemed to be a notice or communication to any SPC designated by such
Bank and no further notice to an SPC shall be required. Delivery by telecopier
of an executed counterpart of this Agreement, any other Credit Document or any
amendment or waiver of any provision of this Agreement or any other Credit
Document (other than a Letter of Credit) shall be effective as delivery of a
manually executed counterpart thereof.

      (b) The Borrowers will have the option to provide to the Agent and the
Collateral Agent all information, documents and other materials that they are
obligated to furnish to the Agent or the Collateral Agent, as the case may be,
pursuant to the Credit Documents, including all notices, requests,

                                      -67-
<PAGE>

financial statements, financial and other reports, certificates and other
information materials, but excluding any such communication that (i) relates to
a request for a new, or a Conversion of an existing, borrowing, a new Letter of
Credit, any increase of any Letter of Credit or other extension of credit
(including any election of an interest rate or Interest Period relating
thereto), (ii) relates to the payment of any principal or other amount due under
this Agreement prior to the scheduled date therefor, (iii) provides notice of
any Default or Event of Default or (iv) is required to be delivered to satisfy
any condition precedent to the effectiveness of any provision of this Agreement
and/or any borrowing, Letter of Credit, increase of any Letter of Credit or
other extension of credit hereunder (all such non-excluded communications being
referred to herein collectively as "Communications"), by transmitting the
Communications in an electronic/soft medium to oploanswebadmin@citigroup.com.

The Borrowers further agree that the Agent or the Collateral Agent may make the
Communications available to the Banks and the Issuing Banks by posting the
Communications on Intralinks or a substantially similar electronic transmission
system (the "Platform"). The Borrowers acknowledge that the distribution of
material through an electronic medium is not necessarily secure and that there
are confidentiality and other risks associated with such distribution.

THE PLATFORM IS PROVIDED "AS IS" AND "AS AVAILABLE". THE AGENT PARTIES (AS
DEFINED BELOW) DO NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE
COMMUNICATIONS, OR THE ADEQUACY OF THE PLATFORM AND EXPRESSLY DISCLAIM LIABILITY
FOR ERRORS OR OMISSIONS IN THE COMMUNICATIONS. NO WARRANTY OF ANY KIND, EXPRESS,
IMPLIED OR STATUTORY, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT OF THIRD
PARTY RIGHTS OR FREEDOM FROM VIRUSES OR OTHER CODE DEFECTS, IS MADE BY THE AGENT
PARTIES IN CONNECTION WITH THE COMMUNICATIONS OR THE PLATFORM. IN NO EVENT SHALL
THE AGENT, THE COLLATERAL AGENT OR ANY OF THEIR RESPECTIVE AFFILIATES OR ANY OF
THE RESPECTIVE OFFICERS, DIRECTORS, EMPLOYEES, AGENTS, ADVISORS OR
REPRESENTATIVES OF THE AGENT, THE COLLATERAL AGENT OR THEIR RESPECTIVE
AFFILIATES (COLLECTIVELY, "AGENT PARTIES") HAVE ANY LIABILITY TO ANY BORROWER,
ANY BANK, ANY ISSUING BANK OR ANY OTHER PERSON OR ENTITY FOR DAMAGES OF ANY
KIND, INCLUDING DIRECT OR INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
DAMAGES, LOSSES OR EXPENSES (WHETHER IN TORT, CONTRACT OR OTHERWISE) ARISING OUT
OF THE TRANSMISSION BY ANY BORROWER, ANY OF THE AGENT PARTIES OR ANY OTHER
PERSON OF COMMUNICATIONS THROUGH THE INTERNET, EXCEPT TO THE EXTENT THE
LIABILITY OF ANY AGENT PARTY IS FOUND IN A FINAL NON-APPEALABLE JUDGMENT BY A
COURT OF COMPETENT JURISDICTION TO HAVE RESULTED PRIMARILY FROM SUCH AGENT
PARTY'S GROSS NEGLIGENCE OR WILLFUL MISCONDUCT.

The Agent agrees that the receipt of the Communications by the Agent at its
e-mail address set forth above shall constitute effective delivery of the
Communications to the Agent for purposes of the Credit Documents. Each of the
Banks and the Issuing Banks agrees that notice to it (as provided in the next
sentence) specifying that the Communications have been posted to the Platform
shall constitute effective delivery of the Communications to such Bank or
Issuing Bank, as the case may be, for purposes of the Credit Documents. Each of
the Banks and the Issuing Banks agrees (i) to notify the Agent in writing
(including by electronic communication) from time to time of such Bank's or such
Issuing Bank's, as the case may be, e-mail address to which the foregoing notice
may be sent by electronic transmission and (ii) that the foregoing notice may be
sent to such e-mail address.

                                      -68-
<PAGE>

Nothing herein shall prejudice the right of the Agent, the Collateral Agent, any
Issuing Bank or any Bank to give any notice or other communication pursuant to
any Credit Document in any other manner specified in such Credit Document.

      SECTION 8.3. No Waiver; Remedies. No failure on the part of any Bank, the
Collateral Agent, any Issuing Bank or the Agent to exercise, and no delay in
exercising, any right under this Agreement or any other Credit Document shall
operate as a waiver thereof, nor shall any single or partial exercise of any
such right preclude any other or further exercise thereof or the exercise of any
other right. The remedies provided in this Agreement are cumulative and not
exclusive of any remedies provided by law.

      SECTION 8.4. Costs and Expenses.

      (a) (i) TWC agrees to pay, within 30 days of receipt by TWC of request
therefor, all reasonable out-of-pocket costs and expenses of the Joint Lead
Arrangers, the Syndication Agent, the Collateral Agent, the Agent and the
Issuing Banks in connection with the syndication, preparation, execution,
delivery, administration, modification and amendment of this Agreement, the
Letters of Credit, the Notes, or any other Credit Document and the other
documents to be delivered under this Agreement, including the reasonable fees
and out-of-pocket expenses of Bracewell & Patterson, L.L.P., counsel for the
Agent, with respect thereto and with respect to advising the Agent as to its
rights and responsibilities under this Agreement, the Notes and any other Credit
Document, the reasonable costs and expenses of the Issuing Banks in connection
with any Letter of Credit, the reasonable out-of-pocket costs and expenses of
the Collateral Agent and all amounts paid by the Collateral Agent pursuant to
any Security Document, and (ii) TWC agrees to pay on demand all costs and
expenses, if any (including reasonable counsel fees and out-of-pocket expenses),
of the Agent, the Collateral Agent, the Syndication Agent, the Issuing Banks and
each Bank in connection with the enforcement (after the occurrence and during
the continuance of an Event of Default and whether through negotiations
(including formal workouts or restructurings), legal proceedings or otherwise)
against any Credit Party of any Credit Document.

      (b) Each Borrower agrees, to the fullest extent permitted by law, to
indemnify and hold harmless the Agent, the Collateral Agent, the Syndication
Agent, the Issuing Banks, the Joint Lead Arrangers and each Bank and each of
their respective affiliates, directors, officers, employees and agents (the
"Indemnified Parties") from and against any and all claims, damages, losses,
liabilities and expenses (including reasonable fees and disbursements of
counsel) of any kind or nature whatsoever for which any of them may become
liable or which may be incurred by or asserted against any of the Indemnified
Parties (other than claims and related damages, losses, liabilities and expenses
made by one Bank (or its successors or assignees) against another Bank) arising
out of, related to or in connection with (i) any Credit Document or any other
document or instrument delivered in connection herewith, (ii) any violation by
any Credit Party or any Subsidiary of any Credit Party of any Environmental Law
or any other law, rule, regulation or order, (iii) any Revolving Credit Advance,
any Letter of Credit or the use or proposed use of the proceeds of any Revolving
Credit Advance or Letter of Credit, (iv) any of the Commitments, (v) any
transaction in which any proceeds of any Letter of Credit or Revolving Credit
Advance are applied or (vi) any investigation, litigation or proceeding, whether
or not any of the Indemnified Parties is a party thereto, related to or in
connection with any of the foregoing or any Credit Document (EXPRESSLY INCLUDING
ANY SUCH CLAIM, DAMAGE, LOSS, LIABILITY OR EXPENSE ATTRIBUTABLE TO THE ORDINARY,
SOLE OR CONTRIBUTORY NEGLIGENCE OF SUCH INDEMNIFIED PARTY, BUT EXCLUDING ANY
SUCH CLAIM, DAMAGE, LOSS, LIABILITY OR EXPENSE SOUGHT TO BE RECOVERED BY ANY
INDEMNIFIED PARTY TO THE EXTENT SUCH CLAIM, DAMAGE, LOSS, LIABILITY OR EXPENSE
IS FOUND IN A FINAL, NON-APPEALABLE JUDGMENT BY A COURT OF COMPETENT
JURISDICTION TO HAVE RESULTED FROM THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF

                                      -69-
<PAGE>

SUCH INDEMNIFIED PARTY OR THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF THE
AFFILIATES, ADVISORS, DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS OF SUCH
INDEMNIFIED PARTY). IT IS THE INTENT OF THE PARTIES HERETO THAT EACH INDEMNIFIED
PARTY SHALL, TO THE EXTENT PROVIDED IN THIS SECTION 8.4(B), BE INDEMNIFIED FOR
ITS OWN ORDINARY, SOLE OR CONTRIBUTORY NEGLIGENCE.

      (c) If any payment of principal of, or Conversion of, or purchase pursuant
to Section 2.6(c) of, or assignment pursuant to a Transfer Agreement referred to
in Section 2.19(c) of, any portion of any Eurodollar Rate Advance owed by any
Borrower to any Bank is made other than on the last day of the Interest Period
for such Eurodollar Rate Advance, as a result of a payment, prepayment or
Conversion pursuant to this Agreement or acceleration of the maturity of the
Notes pursuant to Section 6.1 or such purchase or assignment, such Borrower
shall, upon demand by such Bank (with a copy of such demand to the Agent), pay
to the Agent for the account of such Bank any amounts required to compensate
such Bank for any additional losses, costs or expenses that it may reasonably
incur as a result of such payment, purchase, assignment or Conversion, including
any loss (excluding loss of anticipated profits), cost or expense incurred by
reason of the liquidation or reemployment of deposits or other funds acquired by
any Bank to fund or maintain such Eurodollar Rate Advance.

      (d) Without prejudice to the survival of any other agreement of the
Borrowers hereunder, the agreements and obligations of the Borrowers contained
in Sections 2.2, 2.6 and 2.8 and this Section 8.4 shall survive the payment in
full of principal, interest and all other amounts payable hereunder and under
the Notes.

      SECTION 8.5. Binding Effect; Transfers.

      (a) This Agreement shall become effective (other than Article II, which
shall become effective as set forth in Section 3.1) when it shall have been
executed by the Borrowers, the Agent, the Collateral Agent and the Issuing
Banks, and when each Bank listed on the signature pages hereof has delivered an
executed counterpart hereof to the Agent, has sent to the Agent a facsimile copy
of its signature hereon or has notified the Agent that such Bank has executed
this Agreement and thereafter shall be binding upon and inure to the benefit of
the Borrowers, the Agent, the Collateral Agent, the Issuing Banks and each Bank
and their respective successors and assigns; provided that the Borrowers shall
not have the right to assign any of their rights hereunder or any interest
herein without the prior written consent of the Banks and the Issuing Banks.
Each Bank may assign to one or more banks, financial institutions or other
entities all or a portion of its rights and obligations under this Agreement
(including all or a portion of its Revolving Credit Advances owing to such Bank,
any Note or Notes held by such Bank, its Letter of Credit Interest and any or
all of its Revolving Credit Commitments); provided, that (i) each such
assignment shall be of a constant, and not a varying, percentage of all rights
and obligations under this Agreement and the Notes, (ii) except in the case of
an assignment of all of a Bank's rights and obligations under this Agreement or
an assignment to another Bank, the amount of the Revolving Credit Commitment for
TWC of the assigning Bank being assigned pursuant to each such assignment
(determined as of the date of the Transfer Agreement with respect to such
assignment) shall be in an aggregate amount of $5,000,000 (or such lesser amount
as may be consented to by the Agent and the Borrowers) and in an integral
multiple of $1,000,000 (unless otherwise consented to by the Agent and the
Borrowers), (iii) each such assignment shall be to an Eligible Assignee, (iv)
the parties to each such assignment shall execute and deliver to the Agent, for
its acceptance and recording in the Register maintained by the Agent, a Transfer
Agreement and a processing and recordation fee of $3,500 (which fee shall be
paid by such Eligible Assignee or, in the case of Transfer Agreements referred
to in Section 2.19(c), TWC) and (v) each such assignment of any Revolving Credit
Commitment for any Borrower shall be made only if the same percentage of the
Revolving Credit Commitments of such assigning Bank

                                      -70-
<PAGE>

for each of the other Borrowers and the same percentage of the LC Participation
Percentage of the assigning Bank are simultaneously assigned by the assigning
Bank to the same Eligible Assignee pursuant to the same Transfer Agreement. Upon
such execution, delivery, acceptance and recording, from and after the effective
date specified in each Transfer Agreement, (x) the assignee thereunder shall be
a party hereto as a "Bank" and, to the extent that rights and obligations
hereunder have been assigned to it pursuant to such Transfer Agreement, have the
rights and obligations of a Bank hereunder (including obligations to the Agent
and the Collateral Agent pursuant to Section 7.5) and (y) the Bank assignor
thereunder shall, to the extent that rights and obligations hereunder have been
assigned by it pursuant to such Transfer Agreement, relinquish its rights and be
released from its obligations under this Agreement, except for rights and
obligations which continue after repayment of the Reimbursement Obligations and
Revolving Credit Advances or termination of this Agreement pursuant to the
express terms of this Agreement (and, in the case of a Transfer Agreement
covering all of an assigning Bank's rights and obligations under this Agreement,
such Bank shall cease to be a party hereto, except as to such rights and
obligations).

      (b) By executing and delivering a Transfer Agreement, the Bank assignor
thereunder and the assignee thereunder confirm to and agree with each other and
the other parties hereto as follows: (i) other than as provided in such Transfer
Agreement, such assignor makes no representation or warranty and assumes no
responsibility with respect to any statements, warranties or representations
(whether written or oral) made in or in connection with this Agreement, any
other Credit Document or any other instrument or document furnished pursuant
hereto or in connection herewith, the perfection, existence, sufficiency or
value of any Collateral or the execution, legality, validity, enforceability,
genuineness, sufficiency or value of any Credit Document or any other instrument
or document furnished pursuant hereto or in connection herewith, (ii) such
assignor makes no representation or warranty and assumes no responsibility with
respect to the financial condition of any Borrower or any other Person or the
performance or observance by any Borrower or any other Person of any of its
respective obligations under the Credit Documents or any other instrument or
document furnished pursuant hereto or in connection herewith; (iii) such
assignee confirms that it has received a copy of this Agreement, together with
copies of such financial statements and such other documents and information as
it has deemed appropriate to make its own credit analysis and decision to enter
into such Transfer Agreement; (iv) such assignee will, independently and without
reliance upon the Agent, the Collateral Agent, any Issuing Bank, such assignor
or any other Bank and based on such financial statements and such other
documents and information as it shall deem appropriate at the time, continue to
make its own credit analysis and decisions in taking or not taking action under
this Agreement, any of the other Credit Documents or any other instrument or
document; (v) such assignee confirms that it is an Eligible Assignee; (vi) such
assignee appoints and authorizes the Agent and the Collateral Agent,
respectively, to act as Agent and the Collateral Agent, respectively, on its
behalf and to exercise such powers and discretion under this Agreement, any
other Credit Document or any other document executed in connection herewith or
therewith as are delegated to the Agent and the Collateral Agent, respectively,
by the terms hereof or thereof, together with such powers and discretion as are
reasonably incidental thereto; and (vii) such assignee agrees that it will
perform in accordance with their terms all of the obligations which by the terms
of this Agreement are required to be performed by it as a Bank.

      (c) The Agent shall maintain a copy of each Transfer Agreement, Revolving
Credit Commitment Increase Agreement and Letter of Credit Commitment Increase
Agreement, delivered to and accepted by it and a register for the recordation of
the names and addresses of each Bank and each Issuing Bank together with its
respective Revolving Credit Commitment, Letter of Credit Commitment, LC
Participation Percentage, Letter of Credit Interest and the principal amount of
the Revolving Credit Advances owing to such Bank from time to time (the
"Register"). The entries in the Register shall be conclusive and binding for all
purposes, absent manifest error, and the Borrowers, the Agent, the Issuing Banks
and the Banks may treat each Person whose name is recorded in the Register as a
Bank or Issuing

                                      -71-
<PAGE>

Bank, as the case may be, hereunder for all purposes of this Agreement. The
Register shall be available for inspection by any Borrower, any Issuing Bank or
any Bank at any reasonable time and from time to time upon reasonable prior
notice.

      (d) Upon its receipt of a Transfer Agreement executed and completed by an
assigning Bank and an assignee representing that it is an Eligible Assignee (and
consented to by the Agent, the Issuing Banks and, if required, by TWC), the
Agent shall (i) accept such Transfer Agreement, (ii) record the information
contained therein in the Register and (iii) give prompt notice thereof to the
Borrowers. If requested by the assigning or assignee Bank, each Borrower after
its receipt of such notice, shall, at its own expense, execute and deliver to
the Agent in exchange for the surrendered Notes, new Notes to the order of such
assignee Bank in an amount equal to the Revolving Credit Commitment assumed by
it pursuant to such Transfer Agreement and, if the assigning Bank has retained a
Revolving Credit Commitment hereunder, new Notes to the order of the assigning
Bank in an amount equal to the Revolving Credit Commitment retained by it
hereunder. Such new Notes shall be in an aggregate principal amount equal to the
aggregate principal amount of such surrendered Notes, shall be dated the
effective date of such Transfer Agreement and shall otherwise be in
substantially the form of Exhibit I hereto.

      (e) Each Bank or Issuing Bank may sell participations to one or more banks
or other entities (other than the Borrowers or any of their Affiliates) in or to
all or a portion of its rights and obligations under this Agreement (including
all or a portion of its Commitment, the Revolving Credit Advances owing to it,
the Notes held by it and its Letter of Credit Interest); provided, that (i) such
Bank's or Issuing Bank's, as the case may be, obligations under this Agreement
shall remain unchanged, (ii) such Bank or Issuing Bank, as the case may be,
shall remain solely responsible to the other parties hereto for the performance
of such obligations, (iii) such Bank shall remain the holder of any such Note
for all purposes of this Agreement, (iv) the Borrowers, the Agent, the
Collateral Agent, each other Issuing Bank and the other Banks shall continue to
deal solely and directly with such Bank or Issuing Bank, as the case may be, in
connection with such Bank's or Issuing Bank's, as the case may be, rights and
obligations under this Agreement, (v) all amounts payable under this Agreement
shall be calculated as if such Bank or Issuing Bank, as the case may be, had not
sold such participation, and (vi) the terms of any such participation shall not
restrict such Bank's or Issuing Bank's, as the case may be, ability to consent
to any departure by any Borrower herefrom without the approval of the
participant, except that the approval of the participant may be required to the
extent that such amendment, waiver or consent would reduce the principal of, or
interest on, the Reimbursement Obligations or Revolving Credit Advances or any
fees or other amounts payable hereunder, in each case to the extent subject to
such participation, or postpone any date fixed for any payment of principal of,
or interest on, the Reimbursement Obligations or Revolving Credit Advances or
any fees or other amounts payable hereunder, in each case to the extent subject
to such participation.

      (f) Notwithstanding any other provisions set forth in this Agreement, any
Bank or Issuing Bank may at any time create a security interest in all or any
portion of its rights under this Agreement (including its Letter of Credit
Interest) or any of its Notes in favor of any Federal Reserve Bank in accordance
with Regulation A of the Federal Reserve Board without notice to or consent of
the Borrowers, the Issuing Banks or the Agent. Furthermore, any Bank or Issuing
Bank may assign, as collateral or otherwise, any of its rights (including rights
to payments of principal of and/or interest on its Letter of Credit Interest or
Revolving Credit Advances made by such Bank) under this Agreement, its Notes or
any of its Letter of Credit Interest to any Federal Reserve Bank without notice
to or consent of any Borrower, the Issuing Banks or the Agent.

      (g) Notwithstanding anything to the contrary contained herein, any Bank or
Issuing Bank (a "Designating Bank") with the consent of the Agent (and, if no
Event of Default has occurred and is continuing, the Borrowers) may grant to a
special purpose funding vehicle (an "SPC"), identified as such

                                      -72-
<PAGE>

in writing from time to time by the Designating Bank to the Agent and the
Borrowers, the option to fund all or any part of any payment to any Issuing Bank
or Revolving Credit Advance which the Designating Bank has agreed to make;
provided that no Designating Bank shall have granted at any one time such option
to more than one SPC; and provided further that (i) such Designating Bank's
obligations under this Agreement shall remain unchanged, (ii) such Designating
Bank shall remain solely responsible to the other parties hereto for the
performance of such obligations, (iii) the Borrowers, the Issuing Banks, the
Collateral Agent, the Agent and the other Banks shall continue to deal solely
and directly with such Designating Bank in connection with such Designating
Bank's rights and obligations under this Agreement, (iv) any such option granted
to an SPC shall not constitute a commitment by such SPC to fund any drawing
under a Letter of Credit or to fund any Revolving Credit Advance, and (v)
neither the grant nor the exercise of such option to an SPC shall increase the
costs or expenses or otherwise increase or change the obligations of a Borrower
under this Agreement (including its obligations under Section 2.6). The issuance
of a Letter of Credit or the making of a Revolving Credit Advance by an SPC
hereunder shall utilize the Commitment of the Designating Bank to the same
extent, and as if, such Revolving Credit Advance were made by or such Letter of
Credit were issued by such Designating Bank. Each party hereto hereby agrees
that no SPC shall be liable for any indemnity or similar payment obligation
under this Agreement to the extent that any such indemnity or similar payment
obligations shall have been paid by its Designating Bank. In furtherance of the
foregoing, each party hereto hereby agrees (which agreement shall survive the
termination of this Agreement) that, prior to the date that is one year and one
day after the payment in full of all outstanding commercial paper or other
senior indebtedness of any SPC, it will not institute against, or join any other
person in instituting against such SPC any bankruptcy, reorganization,
arrangement, insolvency or liquidation proceedings under the laws of the United
States. In addition, notwithstanding anything to the contrary contained in this
Section 8.5, an SPC may not assign its interest in any Letter of Credit
Interests or Revolving Credit Advance except that, with notice to, but without
the prior written consent of, the Borrowers and the Agent and without paying any
processing fee therefor, such SPC may assign all or a portion of its interests
in any Letter of Credit Interests or Revolving Credit Advance to the Designating
Bank or to any financial institutions (consented to by the Borrowers, Issuing
Banks and Agent), providing liquidity and/or credit support to or for the
account of such SPC to support the funding or maintenance of Letter of Credit
Interests or Revolving Credit Advance. Each Designating Bank shall serve as the
agent of its SPC and shall on behalf of its SPC: (i) receive any and all
payments made for the benefit of such SPC and (ii) give and receive all
communications and notices, and vote, approve or consent hereunder, and take all
actions hereunder, including votes, approvals, waivers, consents and amendments
under or relating to this Agreement, the Notes and the other Credit Documents.
Any such notice, communication, vote, approval, waiver, consent or amendment
shall be signed by the Designating Bank for the SPC and need not be signed by
such SPC on its own behalf. The Borrowers, the Issuing Banks, the Collateral
Agent, the Agent and the Banks may rely thereon without any requirement that the
SPC sign or acknowledge the same or that notice be delivered to the Borrowers or
the SPC. This Section 8.5(g) may not be amended without the written consent of
any SPC, which shall have been identified to the Agent and the Borrowers.

      SECTION 8.6. Governing Law. This Agreement, the Notes and the other Credit
Documents shall be governed by, and construed in accordance with, the laws of
the State of New York, except as may be provided in any Real Property Mortgage.

      SECTION 8.7. Interest. It is the intention of the parties hereto that the
Agent, each Issuing Bank, the Collateral Agent and each Bank shall conform
strictly to usury laws applicable to it, if any. Accordingly, if the
transactions with the Agent, any Issuing Bank, the Collateral Agent or any Bank
contemplated hereby would be usurious under applicable law, then, in that event,
notwithstanding anything to the contrary in this Agreement, any Credit Document
or any other agreement entered into in connection with or as security for this
Agreement, it is agreed as follows: (i) the aggregate of all consideration which
constitutes interest under applicable law that is contracted for, taken,
reserved,

                                      -73-
<PAGE>

charged or received by the Agent, such Issuing Bank, the Collateral Agent or
such Bank, as the case may be, under this Agreement, the Notes and any other
Credit Document or under any other agreement entered into in connection with or
as security for this Agreement, the Notes or the other Credit Documents shall
under no circumstances exceed the maximum amount allowed by such applicable law
and any excess shall be canceled automatically and, if theretofore paid, shall
at the option of the Agent, such Issuing Bank, the Collateral Agent or such
Bank, as the case may be, be credited by the Agent, such Issuing Bank, the
Collateral Agent or such Bank, as the case may be, on the principal amount of
the obligations owed to the Agent, such Issuing Bank, the Collateral Agent or
such Bank, as the case may be, by the applicable Borrower or refunded by the
Agent, such Issuing Bank, the Collateral Agent or such Bank, as the case may be,
to the applicable Borrower, and (ii) in the event that the maturity of any
obligation payable to the Agent, such Issuing Bank, the Collateral Agent or such
Bank, as the case may be, is accelerated or in the event of any required or
permitted prepayment, then such consideration that constitutes interest under
law applicable to the Agent, such Issuing Bank, the Collateral Agent or such
Bank, as the case may be, may never include more than the maximum amount allowed
by such applicable law and excess interest, if any, to the Agent, such Issuing
Bank, the Collateral Agent or such Bank, as the case may be, provided for in
this Agreement or otherwise shall be canceled automatically as of the date of
such acceleration or prepayment and, if theretofore paid, shall, at the option
of the Agent, such Issuing Bank, the Collateral Agent or such Bank, as the case
may be, be credited by the Agent, such Issuing Bank, the Collateral Agent or
such Bank, as the case may be, on the principal amount of the obligations owed
to the Agent, such Issuing Bank, the Collateral Agent or such Bank, as the case
may be, by the applicable Borrower or refunded by the Agent, such Issuing Bank,
the Collateral Agent or such Bank, as the case may be, to the applicable
Borrower.

      SECTION 8.8. Execution in Counterparts. This Agreement may be executed in
any number of counterparts and by different parties hereto in separate
counterparts, each of which when so executed shall be deemed to be an original
and all of which taken together shall constitute one and the same agreement.
Delivery of a counterpart of a signature page hereof by telecopier shall be as
effective as delivery of an original executed counterpart hereof.

      SECTION 8.9. Survival of Agreements, Representations and Warranties, Etc.
All warranties, representations and covenants made by any Borrower or any
Authorized Officer of any Borrower herein or in any certificate or other
document delivered in connection with this Agreement shall be considered to have
been relied upon by the Banks and the Issuing Banks and shall survive the
issuance of any Letters of Credit and the issuance and delivery of the Notes (if
any) and the making of Revolving Credit Advances regardless of any
investigation.

      SECTION 8.10. Confidentiality. Each Bank agrees that it will not disclose
without the prior consent of TWC (other than to employees, auditors,
accountants, counsel or other professional advisors of the Agent, any Issuing
Bank or any Bank) any information with respect to the Borrowers, which is
furnished pursuant to this Agreement; provided that any Bank and any Issuing
Bank may disclose any such information (1) as has become generally available to
the public, (2) as may be required or appropriate in any report, statement or
testimony submitted to or required by any regulatory body having or claiming to
have jurisdiction over such Bank or Issuing Bank or submitted to or required by
the Federal Reserve Board or the Federal Deposit Insurance Corporation or
similar organizations (whether in the United States or elsewhere) or their
successors, (3) as may be required or appropriate in response to any summons or
subpoena in connection with any litigation, (4) in order to comply with any law,
order, regulation or ruling applicable to such Bank or Issuing Bank, (5) to the
prospective transferee or grantee in connection with any contemplated transfer
of any of the Commitments, Letter of Credit Interests or Revolving Credit
Advances or any interest therein by such Bank or Issuing Bank or the grant of an
option to an SPC to fund any drawing under a Letter of Credit or Revolving
Credit Advance; provided that such prospective transferee executes an agreement
with or for the benefit of the Borrowers containing

                                      -74-
<PAGE>

provisions substantially identical to those contained in this Section 8.10; and
provided further that if the contemplated transfer is a grant of an option to
fund a drawing under a Letter of Credit or Revolving Credit Advance to an SPC
pursuant to Section 8.5(g), such SPC may disclose, if prior notice of the
delivery thereof is given to the Borrowers, such information as may be required
by law or regulation to be delivered, (6) in connection with the exercise of any
remedy by such Bank or Issuing Bank following an Event of Default, (7) in
connection with any litigation involving such Bank pertaining to this Agreement,
any of the Notes or any of the other Credit Documents or any other document
delivered in connection herewith, (8) to any Bank, any Issuing Bank, the
Collateral Agent or the Agent, (9) to any affiliate of any Bank; provided that
such affiliate has agreed with or for the benefit of the Borrowers to be bound
by provisions substantially identical to those contained in this Section 8.10 or
(10) to any prospective New Letter of Credit Issuing Bank or prospective New
Revolving Bank pursuant to Section 2.19.

      SECTION 8.11. WAIVER OF JURY TRIAL. THE BORROWERS, THE AGENT, THE
COLLATERAL AGENT, THE ISSUING BANKS AND THE BANKS HEREBY IRREVOCABLY WAIVE ANY
AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR
RELATING TO THIS AGREEMENT, ANY OF THE NOTES, ANY LETTER OF CREDIT, ANY OTHER
CREDIT DOCUMENT OR ANY OF THE TRANSACTIONS CONTEMPLATED HEREBY.

      SECTION 8.12. Severability. In the event any one or more of the provisions
contained in this Agreement or in any other Credit Document should be held
invalid, illegal or unenforceable in any respect, the validity, legality and
enforceability of the remaining provisions contained herein and therein shall
not in any way be affected or impaired thereby. The parties shall endeavor in
good-faith negotiations to replace the invalid, illegal or unenforceable
provisions with valid provisions the economic effect of which comes as close as
possible to that of the invalid, illegal or unenforceable provisions.

      SECTION 8.13. FORUM SELECTION AND CONSENT TO JURISDICTION; DAMAGES. ANY
LITIGATION BASED HEREON, OR ARISING OUT OF, UNDER, OR IN CONNECTION WITH, ANY
CREDIT DOCUMENT, OR ANY COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS
(WHETHER ORAL OR WRITTEN) OR ACTIONS OF THE AGENT, THE BANKS, ANY ISSUING BANK,
THE COLLATERAL AGENT OR THE BORROWERS IN CONNECTION HEREWITH OR THEREWITH MAY BE
BROUGHT AND MAINTAINED IN THE COURTS OF THE STATE OF NEW YORK SITTING IN THE
COUNTY OF NEW YORK OR IN THE UNITED STATES DISTRICT COURT FOR THE SOUTHERN
DISTRICT OF NEW YORK; PROVIDED, HOWEVER, THAT ANY SUIT SEEKING ENFORCEMENT
AGAINST ANY COLLATERAL MAY BE BROUGHT, AT THE AGENT'S OPTION, IN THE COURTS OF
ANY JURISDICTION WHERE SUCH COLLATERAL MAY BE FOUND. THE BORROWERS IRREVOCABLY
CONSENT TO THE SERVICE OF PROCESS BY REGISTERED MAIL, POSTAGE PREPAID, OR BY
PERSONAL SERVICE WITHIN OR WITHOUT THE STATE OF NEW YORK AT THE ADDRESS FOR
NOTICES SPECIFIED IN ACCORDANCE WITH SECTION 8.2. THE BORROWERS HEREBY EXPRESSLY
AND IRREVOCABLY WAIVE, TO THE FULLEST EXTENT PERMITTED BY LAW, ANY OBJECTION
WHICH THEY MAY HAVE OR HEREAFTER MAY HAVE TO THE LAYING OF VENUE OF ANY SUCH
LITIGATION BROUGHT IN ANY SUCH COURT REFERRED TO ABOVE AND ANY CLAIM THAT ANY
SUCH LITIGATION HAS BEEN BROUGHT IN AN INCONVENIENT FORUM. TO THE EXTENT THAT
ANY BORROWER HAS OR HEREAFTER MAY ACQUIRE ANY IMMUNITY FROM JURISDICTION OF ANY
COURT OR FROM ANY LEGAL PROCESS (WHETHER THROUGH SERVICE OR NOTICE, ATTACHMENT
PRIOR TO JUDGMENT, ATTACHMENT IN AID OF EXECUTION OR OTHERWISE) WITH RESPECT TO
ITSELF OR ITS PROPERTY, SUCH BORROWER HEREBY IRREVOCABLY WAIVES TO THE FULLEST
EXTENT PERMITTED BY LAW

                                      -75-
<PAGE>

SUCH IMMUNITY IN RESPECT OF ITS OBLIGATIONS UNDER THE CREDIT DOCUMENTS. EACH OF
THE BORROWERS, THE AGENT, THE COLLATERAL AGENT, THE ISSUING BANKS AND THE BANKS
HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES, TO THE FULLEST EXTENT IT MAY
EFFECTIVELY DO SO UNDER APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO CLAIM OR
RECOVER IN ANY ACTION OR PROCEEDING REFERRED TO IN THIS SECTION 8.13 ANY
EXEMPLARY, PUNITIVE, SPECIAL OR CONSEQUENTIAL DAMAGES; PROVIDED THAT NOTHING
HEREIN SHALL CONSTITUTE A WAIVER BY THE AGENT, THE COLLATERAL AGENT, ANY ISSUING
BANK OR ANY BANK OF ANY RIGHT TO RECEIVE FULL PAYMENT OF ALL OBLIGATIONS. TWC
HEREBY AGREES TO SERVE AS AGENT FOR SERVICE OF PROCESS ON BEHALF OF EACH OTHER
CREDIT PARTY IN CONNECTION WITH THE CREDIT DOCUMENTS AND THE OBLIGATIONS.

      SECTION 8.14. Right of Set-off. Upon (i) the occurrence and during the
continuance of any Event of Default and (ii) either (a) the Revolving Credit
Advances owed by any Borrower having become due and payable in accordance with
the terms hereof or (b) the making of the request or the granting of the consent
specified by Section 6.1 to authorize the Agent to declare the Revolving Credit
Advances owed by any Borrower due and payable pursuant to the provisions of
Section 6.1, each Bank and each Issuing Bank is hereby authorized at any time
and from time to time, to the fullest extent permitted by law, to set off and
apply any and all deposits (general or special, time or demand, provisional or
final) at any time held and other indebtedness at any time owing by such Bank or
such Issuing Bank, as the case may be, to or for the credit or the account of
such Borrower against any and all of the obligations of such Borrower now or
hereafter existing under this Agreement and the other Credit Documents,
irrespective of whether or not such Bank or such Issuing Bank, as the case may
be, shall have made any demand under this Agreement or any other Credit Document
and although such obligations may be unmatured. Each Bank or Issuing Bank, as
the case may be, agrees promptly to notify such Borrower after such set-off and
application made by such Bank or such Issuing Bank, as the case may be, provided
that the failure to give such notice shall not affect the validity of such
set-off and application. The rights of each Bank and each Issuing Bank under
this Section are in addition to other rights and remedies (including other
rights of set-off) which such Bank or such Issuing Bank, as the case may be, may
have.

      SECTION 8.15. Termination of Security Documents and Guaranties. If (i) the
senior unsecured long-term debt of TWC is rated (a) BBB- or higher by S&P or
Baa3 or higher by Moody's, (b) no lower than BB+ by S&P and (c) no lower than
Ba1 by Moody's, (ii) no Default or Event of Default has occurred and is
continuing, and (iii) the Agent has received (1) a notice from TWC requesting
that the Security Documents and the Guaranties be terminated, (2) a certificate
of TWC certifying, as of the date thereof, the ratings by both S&P and Moody's
of such debt and that no Default or Event of Default has occurred and is
continuing, (3) such other documentation confirming the foregoing that the Agent
may reasonably request, then the Security Documents and the Guaranties shall
terminate on the date (the "Collateral Release Date") that is 5 Business Days
following the Agent's receipt of all such items. With reasonable promptness
following such termination, the Collateral Agent will, at the expense of TWC,
execute and deliver to the Credit Parties such documents as TWC may reasonably
request to evidence such termination and will deliver to TWC any Collateral as
may then be in the Collateral Agent's possession, and TWC will, if requested by
the Collateral Agent, contemporaneously deliver to the Agent a written receipt
therefor in a reasonable form provided by the Collateral Agent.

      IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed by their respective officers thereunto duly authorized, as of the date
first above written.

                                      -76-
<PAGE>

BORROWERS:

THE WILLIAMS COMPANIES, INC.

By:    /s/ Travis N. Campbell
    ------------------------------
Name:  Travis N. Campbell
Title: Treasurer

NORTHWEST PIPELINE CORPORATION

By:    /s/ Travis N. Campbell
    ------------------------------
Name:  Travis N. Campbell
Title: Treasurer

TRANSCONTINENTAL GAS PIPE LINE CORPORATION

By:    /s/ Travis N. Campbell
    ------------------------------
Name:  Travis N. Campbell
Title: Treasurer

AGENT AND COLLATERAL AGENT:

CITICORP USA, INC., as Agent and as Collateral Agent

By:    /s/ Signature Illegible
    ------------------------------
       Authorized Officer
       Attorney-in-Fact

ISSUING BANKS:

CITIBANK, N.A., as Issuing Bank

By:    /s/ Signature Illegible
    ------------------------------
       Authorized Officer
       Attorney-in-Fact

                                      -77-
<PAGE>

BANK OF AMERICA, N.A, as Issuing Bank

By:    /s/ Claire Lui
    ------------------------------
       Authorized Officer
       Claire M. Liu
       Managing Director

BANKS:

CITICORP USA, INC.

By:    /s/ Signature Illegible
    ------------------------------
       Authorized Officer
       Attorney-in-Fact

BANK OF AMERICA, N.A.

By:    /s/ Claire Lui
    ------------------------------
       Authorized Officer
       Claire M. Liu
       Managing Director

JPMORGAN CHASE BANK

By:    /s/ Signature Illegible
    ------------------------------
       Authorized Officer

THE BANK OF NOVA SCOTIA

By:    /s/ N Bell
    ------------------------------
       Nadine Bell
       Senior Manager

                                      -78-
<PAGE>

THE ROYAL BANK OF SCOTLAND PLC

By:    /s/ P J. Dundee
    ------------------------------
       Authorized Officer

BARCLAYS BANK PLC

By:    /s/ Nicholas A. Bell
    ------------------------------
       Authorized Officer
       Nicholas A. Bell
       Director

LEHMAN COMMERCIAL PAPER INC.

By:    /s/ Signature Illegible
    ------------------------------
       Authorized Signatory

TORONTO DOMINION (TEXAS), INC.

By:    /s/ Jill Hall
    ------------------------------
       Authorized Officer
       Jill Hall
       Vice President

CREDIT LYONNAIS NEW YORK BRANCH

By:    /s/ Oliver Audermard
    ------------------------------
       Authorized Officer
       Oliver Audemard
       Senior Vice President

MERRILL LYNCH CAPITAL CORPORATION

By:    /s/ Carol J.E. Feeley
    ------------------------------
       Authorized Officer
       Carol J.E. Feeley
       Vice President
       Merrill Lynch Capital Corp.

                                      -79-
<PAGE>

WESTLB AG, NEW YORK BRANCH

By:    /s/ Duncan Roberson
    ------------------------------
       Duncan Robertson
       Executive Director

By:    /s/ Jeffrey S. Davidson
    ------------------------------
       Jeffrey S. Davidson
       Associate Director

BANK OF OKLAHOMA N.A.

By:    /s/ Robert D. Mattax
    ------------------------------
       Robert D. Mattax
       Senior Vice President

BAYERISCHE LANDESBANK CAYMAN ISLANDS BRANCH

By:    /s/ Wolfgang Kottmann          /s/ James H. Boyle
    ---------------------------------------------------------
       Wolfgang Kottmann              James H. Boyle
       First Vice President           Vice President

BNP PARIBAS

By:    /s/ Larry Robinson
    ------------------------------
       Larry Robinson

By:    /s/ Mark Cox
    ------------------------------
       Mark Cox

THE BANK OF TOKYO-MITSUBISHI, LTD.,
 HOUSTON AGENCY

By:    /s/ Signature Illegible
    ------------------------------
       Authorized Office

                                      -80-<PAGE>

                                                                    Exhibit 10.5

                                                                [Execution Copy]

                      WESTERN MIDSTREAM SECURITY AGREEMENT

      This WESTERN MIDSTREAM SECURITY AGREEMENT, dated as of May 3, 2004 (as it
may be modified, supplemented or amended from time to time in accordance with
its terms, the "Security Agreement"), among WILLIAMS GAS PROCESSING COMPANY, a
Delaware corporation ("WGP"), WILLIAMS FIELD SERVICES COMPANY, a Delaware
corporation ("WFS"), WILLIAMS GAS PROCESSING - WAMSUTTER COMPANY, a Delaware
corporation ("WGPW", WGP. WFS and WGPW are collectively referred to herein as
the "Grantors"), in favor of CITICORP USA, INC., as collateral agent (the
"Collateral Agent") for the benefit of the Financial Institutions.

                             PRELIMINARY STATEMENTS

      A.    The Williams Companies, Inc., a Delaware corporation (the
"Company"), Northwest Pipeline Corporation, a Delaware corporation ("NWP"), and
Transcontinental Gas Pipe Line Corporation, a Delaware corporation ("TGPL", and
together with TWC and NWP, the "Borrowers") have entered into a Credit Agreement
dated as of May 3, 2004 (as amended or otherwise modified from time to time, the
"Credit Agreement", the defined terms of which are used in this Security
Agreement as defined therein unless otherwise defined herein), together with
Citicorp USA, Inc., as administrative agent and collateral agent ("Collateral
Agent"), Bank of America N. A., as syndication agent ("Syndication Agent"),
Citibank, N.A. and Bank of America N.A., as issuing banks ("Issuing Banks") and
the banks named therein (the "Banks"), and JPMorgan Chase Bank, The Bank of Nova
Scotia and The Royal Bank of Scotland PLC as co-documentation agents
(collectively, the "Co-Documentation Agents") and Citigroup Global Markets Inc.
and Banc of America Securities LLC as joint lead arrangers and co-book runners
(collectively, the "Co-Arrangers") providing for the extension of credit and the
issuance of Letters of Credit. The Collateral Agent, Syndication Agent, Issuing
Banks, Banks, Co-Documentation Agents, Co-Arrangers and each of the successors
and permitted assigns of the foregoing are collectively referred to herein as
the "Financial Institutions".

      B.    The Credit Agreement provides for collateral to be held by the
Collateral Agent for the benefit of the Financial Institutions.

      C.    It is a condition to certain transactions under the Credit
Documents, that each of the Grantors shall have executed and delivered this
Security Agreement.

      D.    The Company is the principal financing entity for all capital
requirements of its Subsidiaries, and from time to time the Company has made
capital contributions and advances to its Subsidiaries, including all Grantors.
Each of the Grantors is a wholly owned Subsidiary of the Company and will derive
substantial direct or indirect benefit from the transactions contemplated by the
Credit Agreement.

                                    AGREEMENT

<PAGE>

      Therefore, in order to induce the Financial Institutions to enter into
and/or continue certain financing transactions described in the Credit
Documents, each of the Grantors hereby agrees with Collateral Agent for its
benefit and the ratable benefit of the other Financial Institutions as follows:

                                    ARTICLE I

                                   DEFINITIONS

      Section 1.1 Definitions. The following terms shall have the meanings
specified below, and capitalized terms used in this Security Agreement but not
defined herein shall have the meanings set forth for such terms in the Credit
Agreement.

      "Account" or "Accounts" means "accounts" as that term is defined in the
UCC.

      "Applicable Law" or "Applicable Laws" means all applicable statutes,
regulations, rules, ordinances, codes, licenses, permits, orders and approvals
of each Governmental Authority having jurisdiction over the Grantors, the
Collateral Agent, the Financial Institutions, the Collateral or the Credit
Documents, in each case, as amended, and any judicial or administrative
interpretation thereof, including any judicial order, consent, decree or
judgment applicable to the Grantors, the Collateral Agent, the Financial
Institutions, the Collateral or the Credit Documents.

      "Chattel Paper" means "chattel paper" as that term is defined in the UCC
and any Electronic Chattel Paper and Tangible Chattel Paper owned by any one or
more of the Grantors.

      "Collateral" has the meaning set forth in Section 2.1 of this Security
Agreement.

      "Contract" or "Contracts" means all contracts to which any one or more of
the Grantors now is, or hereafter will be, bound, or a party, beneficiary or
assignee (other than rights evidenced by Chattel Paper, Documents or
Instruments), all Insurance Contracts, and all exhibits, schedules and other
attachments to such contracts, as the same may be amended, supplemented or
otherwise modified or replaced from time to time.

      "Contract Documents" means all Instruments, Chattel Paper, letters of
credit, bonds, guarantees or similar documents evidencing, representing, arising
from or existing in respect of, relating to, securing or otherwise supporting
the payment of, the Contract Rights.

      "Contract Rights" has the meaning set forth in Section 5.1 of this
Security Agreement.

      "Document" or "Documents" means any "document" as that term is defined in
the UCC, including, without limitation, a bill of lading, dock warrant, dock
receipt, warehouse receipt or order for the delivery of goods, and also any
other document which in the regular course of business or financing is treated
as adequately evidencing that the person in possession of it is entitled to
receive, hold and dispose of the document and the goods it covers.

      "Electronic Chattel Paper" means "electronic chattel paper" as that term
is defined in the UCC.

<PAGE>

      "Equipment" means any equipment now or hereafter owned or leased by any of
the Grantors, or in which any Grantor holds or acquires any other right, title
or interest, constituting "equipment" under the UCC, including without
limitation all field lines and drilling equipment, purification equipment,
liquefaction equipment, vaporizing equipment, and all other machinery, tools,
office equipment, furniture, furnishings, fixtures, vehicles, motor vehicles,
and any manuals, instructions, blueprints, computer software (including software
that is imbedded in and part of the equipment) and similar items which relate to
the above, and any and all additions, substitutions and replacements of any of
the foregoing, wherever located together with all improvements thereon and all
attachments, components, parts, equipment and accessories installed thereon or
affixed thereto.

      "Event of Default" means an "Event of Default" as defined in the Credit
Agreement.

      "Fixture" or "Fixtures" means any fixture or fixtures now or hereafter
owned or leased by any Grantor, or in which any Grantor holds or acquires any
other right, title or interest, constituting "fixtures" under the UCC or that is
considered a "fixture" under the law of the state in which such property is
located. "Fixtures" as used in this Security Agreement includes, but shall not
be limited to, Equipment constituting "fixtures" under the UCC or under the law
of the state in which such property is located, all pipe that comprises part of
any pipeline system owned by such Grantor, and any and all additions,
substitutions and replacements of any of the foregoing, wherever located,
including all improvements thereon and all attachments, components, parts,
equipment and accessories installed thereon or affixed thereto together with all
proceeds, products, renewals, increases, profits, substitutions, replacements,
additions, and accessions of any of the foregoing.

      "General Intangible" or "General Intangibles" means all general
intangibles now or hereafter owned by any of the Grantors, or in which any of
the Grantors holds or acquires any other right, title or interest, constituting
"general intangibles" or "payment intangibles" under the UCC, including, but not
limited to, all trademarks, trademark applications, trademark registrations,
trade names, fictitious business names, business names, company names, business
identifiers, prints, labels, trade styles and service marks (whether or not
registered), trade dress, including logos and/or designs, copyrights, patents,
patent applications, goodwill of such entity's or its affiliate's business
symbolized by any of the foregoing, trade secrets, license rights, license
agreements, permits, franchises, and any rights to tax refunds to which any of
the Grantors is now or hereafter may be entitled, provided, however that
"General Intangibles" shall not include any general or limited partnership
interests, limited liability company interests, trust interests, joint ventures
interests or any other similar equity ownership rights arising under the law of
any jurisdiction.

      "Instrument" mean an "instrument" as that term is defined in the UCC,
including, without limitation, any Negotiable Instrument, or any other writing
which evidences a right to the payment of money and is not itself a security
agreement or lease and is of a type which is in the ordinary course of business
transferred by delivery with any necessary endorsement or assignment (other than
Instruments constituting Chattel Paper).

<PAGE>

      "Insurance Contracts" means all contracts and policies of insurance and
re-insurance maintained or required to be maintained by or on behalf of any of
the Grantors under the Credit Documents.

      "Inventory" shall mean all of the inventory of any of the Grantors, or in
which any of the Grantors holds or acquires any right, title or interest, of
every type or description, now owned or hereafter acquired and wherever located,
whether raw, in process or finished, and all materials usable in processing the
same and all documents of title covering any inventory, including, without
limitation, work in process, materials used or consumed in any of the Grantors'
business, now owned or hereafter acquired or manufactured by any of the Grantors
and held for sale in the ordinary course of its business, all present and future
substitutions therefor, parts and accessories thereof and all additions thereto,
all Proceeds thereof and products of such inventory in any form whatsoever, and
any other item constituting "inventory" under the UCC.

      "Inventory Records" shall mean all books, records and other property and
General Intangibles at any time relating to Inventory.

      "Investment Property" means "investment property" as that term is defined
in the UCC, including, without limitation, all securities (whether certificated
or uncertificated), security entitlements, securities accounts, commodity
contracts, and commodity accounts, provided, however that "Investment Property"
shall not include any general or limited partnership interests, limited
liability company interests, trust interests, joint venture interests or any
other similar equity ownership rights arising under the law of any jurisdiction
unless such equity ownership interests or rights constitute Proceeds.

      "Negotiable Instrument" means a "negotiable instrument" as that term is
defined in the UCC.

      "Collateral Permitted Liens" has the meaning given to such term in the
Credit Agreement.

      "Proceeds" means "proceeds" as that term is defined in the UCC, and
includes, but is not limited to, all proceeds of any or all of the Collateral,
including without limitation (a) any and all proceeds of, and all claims for,
any insurance, indemnity, warranty or guaranty payable from time to time with
respect to any of the Collateral, (b) any and all payments (in any form
whatsoever) made or due and payable from time to time in connection with any
requisition, confiscation, condemnation, seizure or forfeiture of all or any
part of the Collateral by any Governmental Authority (or any person acting under
color of governmental authority), (c) all proceeds received or receivable when
any or all of the Collateral are sold, exchanged or otherwise disposed, whether
voluntarily, involuntarily, in foreclosure or otherwise, and (d) any and all
other amounts from time to time paid or payable under or in connection with any
of the Collateral.

      "Receivables" means all Accounts and all of the Grantors' rights to
payment for goods sold or leased, services performed, or otherwise, whether now
in existence or arising from time to time hereafter, including, without
limitation, rights arising under any of the Contracts or evidenced by an
account, note, contract, security agreement, Chattel Paper, or other evidence of
indebtedness or security, together with all of the right, title and interest of
any of the Grantors in
<PAGE>

and to (a) all security pledged, assigned, hypothecated or granted to or held by
any of the Grantors to secure the foregoing, (b) all of any of the Grantors'
right, title and interest in and to any goods or services, the sale of which
gave rise thereto, (c) all guarantees, endorsements and indemnifications on, or
of, any of the foregoing, (d) all powers of attorney granted to any of the
Grantors for the execution of any evidence of indebtedness or security or other
writing in connection therewith, (e) all books, correspondence, credit files,
records, ledger cards, invoices, and other papers relating thereto, including
without limitation all similar information stored on a magnetic medium or other
similar storage device and other papers and documents in the possession or under
the control of any of the Grantors or any computer bureau from time to time
acting for any of the Grantors, (f) all evidences of the filing of financing
statements and other statements granted to any of the Grantors and the
registration of other instruments in connection therewith and amendments
thereto, notices to other creditors or secured parties, and certificates from
filing or other registration officers, (g) all credit information, reports and
memoranda relating thereto, and (h) all other writings related in any way to the
foregoing.

      "Secured Obligations" shall mean the Obligations (as such term is defined
in the Credit Agreement).

      "Tangible Chattel Paper" means "tangible chattel paper" as that term is
defined in the UCC.

      "Titled Vehicles" means vehicles in which a security interest can not be
perfected by filing a financing statement under the UCC.

      "UCC" shall mean the Uniform Commercial Code in effect in the State of New
York, as amended from time to time.

                                   ARTICLE II

                               SECURITY INTERESTS

      Section 2.1 Pledge, Assignment and Grant of Security Interests. As
collateral security for the prompt and complete payment and performance when due
of all Secured Obligations, each Grantor, severally, hereby assigns and pledges
to Collateral Agent for the benefit of the Financial Institutions and hereby
grants to the Collateral Agent for the benefit of the Financial Institutions a
lien on and continuing security interest in all of such Grantor's right, title
and interest in, to and under (all items described in this Section 2.1, whether
now owned or hereafter acquired by such Grantor and wherever located and whether
now existing or hereafter arising, collectively, the "Collateral"):

      (a)   all Contracts, all Contract Rights, all Contract Documents and each
            and every document granting security to any of the Grantors under
            any such Contract, and any Instrument related to or arising because
            of any such Contract;

      (b)   all Receivables;

      (c)   all Investment Property;

<PAGE>

      (d)   all General Intangibles;

      (e)   all Chattel Paper;

      (f)   all Documents;

      (g)   all Equipment;

      (h)   all Inventory;

      (i)   all Fixtures;

      (j)   all amounts from time to time held in any checking, savings, deposit
            or other account of any of the Grantors, all monies, proceeds or
            sums due or to become due therefrom or thereon and all documents
            (including, but not limited to passbooks, certificates and receipts)
            evidencing all funds and investments held in such accounts;

      (k)   all Governmental Requirements now or hereafter held by any of the
            Grantors (except that any Governmental Requirement which would by
            its terms or under Applicable Law become void, voidable, terminable
            or revocable by being subjected to the Lien of this Security
            Agreement or in which a Lien is not permitted to be granted under
            Applicable Law, is hereby excluded from such Lien to the extent
            necessary so as to avoid such voidness, voidability, terminability
            or revocability);

      (l)   all rights to receive a payment under any hedging agreement in
            connection with a termination thereof;

      (m)   without limiting the generality of the foregoing, all other personal
            property, goods, Instruments, credits, claims, and demands of such
            Grantor whether now existing or hereafter acquired from time to
            time;

      (n)   any and all additions, accessions and improvements to, all
            substitutions and replacements for and all products and Proceeds of
            or derived from all of the foregoing items described above in this
            Section 2.1; and

      (o)   any and all Proceeds of any of the foregoing.

      Notwithstanding the general grant of a security interest set forth above
in this Section 2.1, "Collateral" as used herein and the defined terms used
above in the description of Collateral shall not include (i) the Excluded
Assets, (ii) the LC Cash Collateral Accounts, or (iii) any property to the
extent that a grant of a security interest therein is prohibited by any
requirements of law of a Governmental Authority, requires a consent not obtained
of any Governmental Authority pursuant to such requirement of law or is
prohibited by, or constitutes a breach or default under or results in the
termination of or requires any consent not obtained under, any contract,
license, agreement, instrument or other document evidencing or giving rise to
such property, except to the extent that such requirement of law or the term in
such contract, license, agreement,

<PAGE>

instrument or other document providing for such prohibition, breach, default or
termination or requiring such consent is ineffective under applicable law.

      Section 2.2 After-Acquired Property. The security interest pledged,
assigned and granted to Collateral Agent pursuant to this Security Agreement is
intended to extend to all Collateral of the kind that is the subject of this
Security Agreement which any of the Grantors may acquire at any time during the
continuation of this Security Agreement, irrespective of whether such Collateral
is in transit or in any of the Grantors' or Collateral Agent's or any other
Person's constructive, actual, or exclusive occupancy or possession.

      Section 2.3 Obligations Independent. The obligations of each Grantor under
this Security Agreement are independent of the obligations of the Borrowers, any
other Grantor, or any other Person, and a separate action or actions may be
brought and prosecuted against any one or more of the Grantors to enforce this
Security Agreement, irrespective of whether any action is brought against the
Borrowers, any other Grantor, or any other Person or whether the Borrowers, the
Grantors, or any other Person is joined in any such action or actions.

      Section 2.4 Obligations Absolute. Each Grantor agrees, severally, that it
will perform its obligations hereunder strictly in accordance with the terms of
this Security Agreement regardless of any law, regulation or order now or
hereafter in effect in any jurisdiction affecting the Secured Obligations of the
other Credit Parties or the rights of any of the Financial Institutions with
respect thereto. The liability of each of the Grantors under this Security
Agreement shall be absolute and unconditional irrespective of:

      (a)   any lack of validity or enforceability of any Credit Document;

      (b)   any change in the time, manner or place of payment of, or in any
            other term of, all or any of the Secured Obligations or any other
            liabilities, or any other amendment or waiver of or any consent to
            departure from any Credit Document, including, without limitation,
            any increase in the Secured Obligations or any other liabilities
            resulting from the extension of additional credit or otherwise;

      (c)   any liquidation, dissolution or termination of existence of, or
            other change in, any Borrower or any other Person;

      (d)   any bankruptcy, insolvency, receivership or other proceeding
            involving any Borrower, any one or more of the Grantors, or any
            other Person or any defense that may arise in connection with or as
            a result of any such bankruptcy, insolvency, receivership or other
            proceeding or otherwise;

      (e)   any taking, exchange, release or non-perfection of any Collateral,
            or any taking, release or amendment or waiver of or consent to
            departure from any guaranty, for all or any of the Secured
            Obligations or any other liabilities;

      (f)   any manner of application of Collateral, or proceeds thereof or of
            collections on account of any guaranty, to all or any of the Secured
            Obligations or any other liabilities, or any manner of sale or other
            disposition of any Collateral for all or
<PAGE>

            any of the Secured Obligations or any other liabilities or of any
            other Collateral of any Borrower, any one or more of the Grantors,
            or any other Person; or

      (g)   any other circumstances which might otherwise constitute a defense
            available to, or a discharge of, any Borrower, any one or more of
            the Grantors, a surety or any other Person (other than the
            satisfaction of the Secured Obligations).

      Section 2.5 Security for Obligations. The security interests and other
rights granted pursuant to this Security Agreement secure, and the Collateral is
security for, the prompt performance and payment in full in cash when due,
whether at stated maturity, by acceleration or otherwise of the Secured
Obligations. Notwithstanding that the balance of the Secured Obligations may at
certain times be zero and that no Letters of Credit may at certain times be
outstanding, the Liens granted hereunder to the Collateral Agent shall remain in
full force and effect at all times and with the same priority until the payment
in full in cash of the Secured Obligations, the termination of the commitments,
however described, under the Credit Documents, the repayment of all obligations
due and the expiration or termination of all outstanding letters of credit
provided under the Credit Documents (all such commitments, repayment obligations
and outstanding letters of credit are referred to herein as the "Credit Document
Commitments").

      Section 2.6 Actions Prior to Event of Default. With respect to each
Grantors' obligation pursuant to Sections 5.1(e)(i), 5.1(g), and 5.1(l)(i) of
the Credit Agreement to cause an Acceptable Security Interest in the Collateral
described in this Security Agreement to be created, unless an Event of Default
has occurred and is continuing, such obligation shall be satisfied by the
execution of this Security Agreement and the filing of applicable financing
statements pursuant to Section 3.2 hereof. Subject to each Grantors' compliance
with the obligations described in the previous sentence, such Grantor shall not
be required to take any further action with respect to the granting or
perfection of a security interest in the Collateral covered hereby, including
without limitation, providing the Collateral Agent with "control" (within the
meaning of Section 8-106 of the UCC) of any deposit accounts, securities
accounts or other account or taking any action with respect to Titled Vehicles
or delivery of any Collateral, including any Instrument, Document, Chattel
Paper, or Negotiable Instrument, unless an Event of Default has occurred and is
continuing. Following the occurrence and during the continuance of an Event of
Default and upon Collateral Agent's request, each Grantor shall promptly take
all actions required by the Collateral Agent to cause an Acceptable Security
Interest to exist in all Collateral.

      Section 2.7 Grantors Remain Liable. Notwithstanding any other provisions
of this Security Agreement to the contrary, (a) each Grantor shall remain
severally liable to perform any and all obligations imposed on such Grantor
under the Credit Documents or with respect to the Collateral and to perform any
and all duties and obligations thereunder to the same extent as if this Security
Agreement had not been executed, (b) the exercise by Collateral Agent of any of
its rights hereunder shall not release any of the Grantors from any of its
duties or obligations under the Credit Documents and (c) neither Collateral
Agent nor any of the other Financial Institutions shall have any obligation or
liability under the Credit Documents by reason of this Security Agreement, nor
shall Collateral Agent or any other Financial Institution be obligated to
perform
<PAGE>

any of the obligations or duties of any of the Grantors thereunder or to take
any action to collect or enforce any claim for payment assigned hereunder.

      Section 2.8 Power of Attorney. Each Grantor hereby constitutes and
appoints Collateral Agent as such Grantor's attorney-in-fact, at all of
Grantors' cost and expense, for which each Grantor shall be severally liable, to
exercise, in Collateral Agent's discretion after the occurrence and during the
continuance of an Event of Default, all or any of the following powers, which
appointment, being coupled with an interest, shall be irrevocable until all of
the Secured Obligations have been paid in full and all Commitments have been
terminated:

      (a)   to obtain and adjust insurance under insurance policies naming any
            of the Grantors as an insured party;

      (b)   to receive, take, endorse, sign, assign, deliver and collect, all in
            Collateral Agent's name or any Grantor's name, any and all checks,
            notes, drafts, and other documents or instruments relating to the
            Collateral;

      (c)   to ask, demand, collect, sue for, recover, compromise, receive and
            give acquittance and receipts for moneys due and to become due under
            or in connection with the Collateral;

      (d)   to receive, open and dispose of all mail addressed to any of the
            Grantors with respect to the Collateral which comes into the
            possession of Collateral Agent and to notify postal authorities to
            change the address for delivery thereof to such address as
            Collateral Agent designates, with a copy of such notice to the
            affected Grantor;

      (e)   to request from account debtors of any of the Grantors, in the
            affected Grantor's name or Collateral Agent's name or that of
            Collateral Agent's designee, information concerning the Receivables
            and the amounts owing thereon;

      (f)   to transmit to account debtors indebted on Receivables a notice of
            Collateral Agent's interest therein;

      (g)   to notify account debtors indebted on Receivables to make payment
            directly to Collateral Agent; and

      (h)   to take or bring, in any Grantor's name or Collateral Agent's name,
            all steps, actions, suits or proceedings deemed by Collateral Agent
            necessary or desirable to enforce or effect collection of any of the
            Collateral or otherwise to enforce compliance with the terms and
            conditions of any Contract or the rights of Collateral Agent with
            respect to any of the Collateral.

      Section 2.9 Waiver. Each of the Grantors hereby waives promptness,
diligence, notice of acceptance and any other notice (except notices expressly
required to be given to the Grantors under this Security Agreement) with respect
to any of the Secured Obligations and this Security Agreement and any
requirement that Collateral Agent or any other Financial Institution protect,
secure, perfect or insure any security interest or other Lien or any property
subject thereto or

<PAGE>

exhaust any right to take any action against any one or more of the Grantors or
any other Person or any of the Collateral.

      Section 2.10 Subrogation. Each of the Grantors hereby irrevocably waives
any and all rights to which it may be entitled (by operation of law or
otherwise) by performing its obligations under this Security Agreement to be
subrogated to the rights of the Financial Institutions against any Borrowers or
any of the other Grantors until the Obligations have been paid in full and the
Commitments have been terminated. If any amount shall be paid to any of the
Grantors on account of such subrogation rights, such Grantor agrees to hold such
amount or such payment, as the case may be, in trust for the benefit of the
Financial Institutions, and such Grantor agrees to forthwith pay such amount or
such payment, as the case may be, to the Collateral Agent to be credited against
and applied upon the Secured Obligations, whether matured or unmatured, in such
order as may be determined by the Collateral Agent.

      Section 2.11 Limitation on Grant. The Financial Institutions and each of
the Grantors hereby acknowledge that the security interests granted pursuant to
this Security Agreement and the obligations more fully described herein are
limited to an aggregate transfer equal to the largest amount that would not
render such Grantor's grant and obligations under the Security Documents subject
to avoidance under Section 548 of the United States Bankruptcy Code or any
comparable provisions of an applicable state law.

                                   ARTICLE III

                GENERAL REPRESENTATIONS, WARRANTIES AND COVENANTS

      In addition to such representations, warranties and covenants as are made
by the Borrowers and by and on behalf of any one or more of the Grantors under
the Credit Documents, which representations, warranties and covenants are hereby
deemed made and incorporated into this Security Agreement each as though set
forth in its entirety herein, each Grantor, represents and warrants, as of the
date hereof and as of the date of each extension of credit under the Credit
Agreement, as follows in this Article III:

      Section 3.1 Chief Executive Office; Name; Records. Each Grantor's (a)
chief executive office address, and (b)state of organization and exact legal
name, as reflected in its certificate of incorporation or other original
organization document approved by the Governmental Authority charged with
approving such documents and authorizing and authenticating the existence of
entities in the applicable jurisdiction, is set forth in Schedule I to this
Security Agreement. Such information on Schedule I shall be deemed to be updated
from time to time by notice to the Collateral Agent given in accordance with
Section 5.2(i) of the Credit Agreement.

      Section 3.2 Financing Statements and Registrations. Each Grantor
authorizes Collateral Agent to file in such jurisdictions as determined by
Collateral Agent any such financing or continuation statements, and amendments
thereto, relating to all or any part of the Collateral without the signature of
each Grantor where permitted by Applicable Law.

<PAGE>

                                   ARTICLE IV

 SPECIAL PROVISIONS CONCERNING RECEIVABLES, CONTRACTS, INSTRUMENTS AND ACCOUNTS

      Section 4.1 Payments Under Contracts and Receivables.

      (a)   Notice to Grantors under Contracts. Each Grantor agrees and confirms
            that, upon the request of Collateral Agent made after an Event of
            Default and during the continuance thereof, it will notify each
            party to any Contracts of the assignment thereof to Collateral
            Agent, instruct each of them that all payments due or to become due
            and all amounts payable to such Grantor under such Contracts shall,
            until the Secured Obligations are paid in full and the Credit
            Document Commitments have been terminated, be made to Collateral
            Agent, and, if requested by Collateral Agent and reasonably
            feasible, obtain a written consent and acknowledgement from them in
            form and substance reasonably acceptable to Collateral Agent. Unless
            notified to the contrary by Collateral Agent, each Grantor shall, at
            its own cost and expense, enforce collection of any amounts payable
            under the Contracts in accordance with Section 5.1(l)(vi) of the
            Credit Agreement.

      (b)   Non-Payment to Collateral Agent. Until the Secured Obligations are
            paid in full and all Credit Document Commitments have been
            terminated, if after the occurrence of an Event of Default and
            during the continuance thereof and upon the request of the
            Collateral Agent any of the Grantors shall receive directly from any
            party to the Contracts or from any account debtor or other obligor
            under any Receivable any payments under the Contracts or the
            Receivables, such Grantor shall receive (and hereby acknowledges
            that it is receiving) such payments in trust for the benefit of the
            Financial Institutions, shall segregate such payments from other
            funds of such Grantor, and shall forthwith transmit and deliver such
            payments to the Collateral Agent in the same form as so received
            (with any necessary endorsement) for application to the Secured
            Obligations.

      (c)   No Assignment of, or Obtaining Consents under, Contracts. No Grantor
            shall be required to assign any of its interests in or rights or
            remedies under any Contract or Contract Documents, including,
            without limitation, any hedging agreements, or obtain any consent
            thereunder except during the existence of an Event of Default.

      Section 4.2 Direction to Account Parties, Contracting Parties, etc. Each
Grantor agrees that, upon the occurrence and during the continuance of an Event
of Default, such Grantor shall be bound by any collection, compromise,
forgiveness, extension or other action taken by Collateral Agent with respect to
the Receivables and the Contracts. Upon the occurrence and during the
continuance of an Event of Default, without notice to or assent from any of the
Grantors, Collateral Agent may apply any or all amounts then or thereafter
deposited with it to the Secured Obligations. The costs and expenses (including
reasonable attorneys' fees) of collection, whether incurred by any of the
Grantors or Collateral Agent, shall be borne by the Grantors.

<PAGE>

                                    ARTICLE V

                     SPECIAL PROVISIONS CONCERNING CONTRACTS

      Section 5.1 Security Interest in Contract Rights. Each Grantor's grant,
pursuant to Section 2.1 of this Security Agreement, to the Financial
Institutions of a security interest in and on all of the right, title and
interest in and to each and all of the Contracts, the Contract Documents and the
contract rights thereunder owned by such Grantor, includes, but is not limited
to:

      (a)   all (i) of such Grantor's rights to payment under any Contract or
            Contract Document and (ii) payments due and to become due to such
            Grantor under any Contract or Contract Document, in each case
            whether as contractual obligations, damages or otherwise;

      (b)   all of such Grantor's claims, rights, powers, or privileges and
            remedies under any Contract or Contract Document; and

      (c)   all of such Grantor's rights under any Contract or Contract Document
            to make determinations, to exercise any election (including, but not
            limited to, election of remedies) or option or to give or receive
            any notice, consent, waiver or approval together with full power and
            authority with respect to any Contract or Contract Document to
            demand, receive, enforce or collect any of the foregoing rights or
            any property which is the subject of any Contract or Contract
            Document, to enforce or execute any checks, or other instruments or
            orders, to file any claims and to take any action which, in the
            opinion of Collateral Agent, may be necessary or advisable in
            connection with any of the foregoing (all of the foregoing in this
            Section 5.1, the "Contract Rights").

      Section 5.2 Contract Right Remedies. Upon the occurrence and during the
continuation of an Event of Default (but not prior to such time), Collateral
Agent may enforce all remedies, rights, powers and privileges of any one or more
of the Grantors under any or all of the Contracts and Contract Documents and/or
substitute itself or any nominee or trustee in lieu of such Grantor or Grantors
as party to any of the Contracts and Contract Documents.

                                   ARTICLE VI

                                    REMEDIES

      Section 6.1 Remedies; Obtaining the Collateral Upon Default. Upon the
occurrence and during the continuance of an Event of Default, Collateral Agent
shall have all the rights and remedies of a secured party under the laws which
govern the creation, perfection or enforcement of security interests hereunder
to enforce this Security Agreement and the security interests contained herein,
and, in addition, Collateral Agent may, upon the occurrence and during the
continuance of an Event of Default, in addition to its other rights and remedies
hereunder, including without limitation under Section 6.2 hereof, do any of the
following to the extent permitted by Applicable Law:

<PAGE>

      (a)   personally, or by trustees or attorneys, immediately take possession
            of the Collateral or any part thereof, from any one or more of the
            Grantors or any other Person who then has possession of any part
            thereof with or without notice or process of any Applicable Law, and
            for that purpose may enter upon any one or more of the Grantors'
            premises where any of the Collateral is located and remove the same
            and use in connection with such removal any and all services,
            supplies, aids and other facilities of any one or more of the
            Grantors;

      (b)   take possession of the Collateral or any part thereof, by directing
            any one or more of the Grantors in writing to deliver the same to
            Collateral Agent at any place or places designated by Collateral
            Agent, in which event the applicable Grantor shall at its own
            expense:

            (i)   forthwith cause the same to be moved to the place or places so
                  designated by Collateral Agent and there be delivered to
                  Collateral Agent;

            (ii)  store and keep any Collateral so delivered to Collateral Agent
                  at such place or places pending further action by Collateral
                  Agent as provided in Section 6.2 of this Security Agreement;
                  and

            (iii) while the Collateral shall be so stored and kept, provide such
                  guards and maintenance services as shall be necessary to
                  protect the same and to preserve and maintain same in good
                  condition.

To the extent permitted by Applicable Law, each Grantor's obligation to deliver
the Collateral is of the essence of this Security Agreement and, accordingly,
upon application to a court of equity having jurisdiction, Collateral Agent
shall be entitled to obtain a decree requiring specific performance by any one
or more of the Grantors of said obligations.

      Section 6.2 Disposition of the Collateral. Any Collateral of which
Collateral Agent has taken possession under or pursuant to Section 6.1 of this
Security Agreement and any other Collateral, whether or not so possessed by
Collateral Agent, may, upon the occurrence and during the continuance of an
Event of Default, to the extent permitted by Applicable Law (including, without
limitation, the rules and regulations of the FERC), be sold, leased or otherwise
disposed of under one or more contracts or as an entirety, and without the
necessity of gathering at the place of sale the property to be sold, and in
general in such manner, at such time or times, at such place or places and on
such terms as Collateral Agent may, in compliance with any requirements of
Applicable Law, determine to be commercially reasonable. Any such disposition
shall be made upon not less than ten (10) days' written notice to the applicable
Grantor specifying the time such disposition is to be made and, if such
disposition shall be a public sale, specifying the place of such sale. Any such
sale may be adjourned by announcement at the time and place fixed therefor, and
such sale may, without further notice, be made at the time and place to which it
was so adjourned. Any of the Collateral may be sold, leased or otherwise
disposed of, in the condition in which the same existed when taken by Collateral
Agent or after any overhaul or repair which Collateral Agent shall determine to
be commercially reasonable. To the extent permitted by Applicable Law,
Collateral Agent or any Financial Institution may itself bid for and become the
purchaser of the Collateral or any item thereof

<PAGE>

offered for sale at a public auction without accountability to any of the
Grantors (except to the extent of any surplus money received as provided in the
Credit Documents).

      Section 6.3 Waiver.

      (a)   EXCEPT AS OTHERWISE PROVIDED IN THIS SECURITY AGREEMENT, EACH
            GRANTOR HEREBY WAIVES, TO THE EXTENT PERMITTED BY APPLICABLE LAW,
            NOTICE OR JUDICIAL HEARING IN CONNECTION WITH COLLATERAL AGENT'S
            TAKING POSSESSION OR COLLATERAL AGENT'S DISPOSITION OF ANY OF THE
            COLLATERAL, INCLUDING, WITHOUT LIMITATION, ANY AND ALL PRIOR NOTICE
            AND HEARING FOR ANY PREJUDGMENT REMEDY OR REMEDIES AND ANY SUCH
            RIGHT WHICH ANY OF THE GRANTORS WOULD OTHERWISE HAVE UNDER ANY
            APPLICABLE LAW, AND EACH GRANTOR, FOR ITSELF AND ALL WHO MAY CLAIM
            UNDER IT, HEREBY FURTHER WAIVES, TO THE FULLEST EXTENT PERMITTED BY
            APPLICABLE LAW:

            (i)   all damages occasioned by such taking of possession of any
                  Collateral except to the extent attributable to the gross
                  negligence or willful misconduct of the Collateral Agent or
                  its agents;

            (ii)  all other requirements as to the time, place and terms of sale
                  or other requirements with respect to the enforcement of
                  Collateral Agent's rights hereunder; and

            (iii) all rights of redemption, appraisement, valuation, stay,
                  extension or moratorium now or hereafter in force under any
                  Applicable Law in order to prevent or delay the enforcement of
                  this Security Agreement or the absolute sale of the Collateral
                  or any portion thereof.

      (b)   Without limiting the generality of the foregoing and to the extent
            permitted by Applicable Law, during the continuance of an Event of
            Default, each Grantor hereby: (i) authorizes Collateral Agent, in
            its sole discretion and without notice to or demand upon any of the
            Grantors and without otherwise affecting the obligations applicable
            hereunder from time to time, to take and hold other collateral (in
            addition to the Collateral) for payment of any Secured Obligations,
            or any part thereof, and to exchange, enforce or release such other
            collateral or any part thereof, and to accept and hold any
            endorsement or guarantee of payment of the Secured Obligations or
            any part thereof, and to release or substitute any endorser or
            guarantor or any other Person granting security for or in any way
            obligated upon any Secured Obligations, or any part thereof; and
            (ii) waives and releases any and all right to require Collateral
            Agent to collect any of the Secured Obligations from any specific
            item or items of Collateral or from any other party liable as
            guarantor or in any other manner in respect of any of the Secured
            Obligations or from any collateral (other than the Collateral) for
            any of the Secured Obligations.

      (c)   To the extent permitted by Applicable Law, any sale of, or the grant
            of options to purchase, or any other realization upon, any
            Collateral shall operate to divest all

<PAGE>

            right, title, interest, claim and demand, either at law or in
            equity, of any of the Grantors therein and thereto.

      Section 6.4 Application of Proceeds. The proceeds of any sale of the
Collateral or any part thereof shall be applied (i) first, to payment of all
reasonable costs, fees and expenses, including indemnity payments owing to and
reasonable attorneys' fees and expenses incurred by Collateral Agent in
exercising the remedies hereunder (ii) second, to the payment of the Secured
Obligations and/or deposited into a LC Cash Collateral Account in accordance
with the applicable provisions of the Credit Agreement, and (iii) third, the
remainder, if any, shall be paid to the respective Grantor, or to Grantor's
heirs, devisees, representatives, successors or permitted assigns, or such other
persons as may be entitled thereto. Grantor shall be liable for any remaining
deficiency remaining after sale.

      Section 6.5 Remedies Cumulative; No Waiver. Each and every right, power
and remedy hereby specifically given to Collateral Agent shall be in addition to
every other right, power and remedy specifically given under this Security
Agreement, under any other Security Document or now or hereafter existing at law
or in equity, or by statute, and each and every right, power and remedy whether
specifically herein given or otherwise existing may be exercised from time to
time or simultaneously and as often and in such order as may be deemed expedient
by Collateral Agent. All such rights, powers and remedies shall be cumulative,
and the exercise or the partial exercise of one shall not be deemed a waiver of
the right to exercise of any other. No delay or omission of Collateral Agent in
the exercise any of its rights, remedies, powers and privileges hereunder or
partial or single exercise thereof and no renewal or extension of any of the
Secured Obligations, shall impair any such right, remedy, power or privilege or
shall constitute a waiver thereof.

      Section 6.6 Discontinuance of Proceedings. In case Collateral Agent shall
have instituted any proceeding to enforce any right, power or remedy under this
Security Agreement by foreclosure, sale, entry, or otherwise, and such
proceeding shall have been discontinued or abandoned for any reason, or shall
have been determined adversely to Collateral Agent, then, in every such case,
each of the Grantors, Collateral Agent and each holder of any of the Secured
Obligations shall be restored to their former positions and rights hereunder
with respect to the Collateral, subject to the security interest created under
this Security Agreement, and all rights, remedies and powers of Collateral Agent
shall continue as if no such proceeding had been instituted.

                                  ARTICLE VII

                           CONCERNING COLLATERAL AGENT

      Section 7.1 Collateral Agent's Rights. The provisions of Article VII of
the Credit Agreement shall inure to the benefit of Collateral Agent in respect
of this Security Agreement and shall be binding upon the parties hereto.

      Section 7.2 Action by Nominees. Notwithstanding anything to the contrary
in this Security Agreement, any and all of the rights, powers and remedies of
Collateral Agent under this Security Agreement may be exercised by any
nominee(s) of the Collateral Agent or any

<PAGE>

other agent, person or nominee acting on behalf of the Collateral Agent may
assign or delegate all or any part of its rights and obligations under this
Security Agreement to any one or more agent(s), person(s) or other nominee(s).

      Section 7.3 Limitation on Duty of Collateral Agent in Respect of
Collateral. Collateral Agent shall have no duty as to any Collateral in its
possession or control other than to comply with mandatory provisions of law and
for its gross negligence or willful misconduct or in the possession or control
of any agent or bailee or any income thereon or as to the preservation of rights
against prior parties or any other rights pertaining thereto. Collateral Agent
shall not be liable or responsible for any loss or damage to any of the
Collateral, or for any diminution in the value thereof, by reason of the act or
omission of any warehouseman, carrier, forwarding agency, consignee or other
agent or bailee selected by Collateral Agent, unless Collateral Agent was
grossly negligent in the selection thereof. Collateral Agent may, without notice
to any of the Grantors except as required by law and (except as expressly
required in the last sentence of this Section 7.3) at any time or from time to
time, (i) after the occurrence and during the continuance of an Event of
Default, and if (ii) either (a) the Revolving Credit Advances owed by any
Borrower having become due and payable in accordance with the terms of the
Credit Agreement or (b) the making of the request or the granting of the consent
specified by Section 6.1 of the Credit Agreement to authorize the Agent to
declare the Revolving Credit Advances owed by any Borrower due and payable
pursuant to the provisions of Section 6.1 of the Credit Agreement, charge,
set-off and otherwise apply all or any part of the Secured Obligations against
any funds held with respect to the Collateral or in any other deposit account.
Collateral Agent or each Financial Institution (as the case may be, agree
promptly to notify the Grantors after any such set-off and application made by
Collateral Agent or such Financial Institution provided that the failure to give
such notice shall not affect the validity of such set-off and application.

                                  ARTICLE VIII

                                  MISCELLANEOUS

      Section 8.1 Notices. Except as otherwise specified herein, all notices,
requests, demands, consents, instructions or other communications hereunder
shall be given in accordance with the terms of Section 8.2 of the Credit
Agreement; however, any notice to a Grantor shall be deemed effective if
delivered to the Company.

      Section 8.2 Amendments; Waivers. Any amendment or waiver to this Security
Agreement or any provision hereof shall only be effective to the extent such
amendment or waiver (a) complies with all of those requirements set forth in
Section 8.1 of the Credit Agreement and (b) is executed by the Persons that
would be required to execute a like amendment of the Credit Agreement.
Furthermore, all amendments and waivers to this Security Agreement will be
subject to the limitations and restrictions applicable to amendments and waivers
of the Credit Agreement.

      Section 8.3 Successors and Assigns. This Security Agreement shall be
binding upon and inure to the benefit of the Grantors, Collateral Agent and the
other Financial Institutions and their respective successors and permitted
assigns.

<PAGE>

      Section 8.4 Survival. All agreements, statements, representations and
warranties made by the Grantors herein or in any certificate or other instrument
delivered by the Grantors or on the behalf of the Grantors under this Security
Agreement shall be considered to have been relied upon by Collateral Agent and
the other Financial Institutions and shall survive the execution and delivery of
this Security Agreement and the other Credit Documents regardless of any
investigation made by Collateral Agent or any other Financial Institution or on
their behalf.

      Section 8.5 Headings Descriptive. The headings of the various articles,
sections and paragraphs of this Security Agreement are for convenience of
reference only, do not constitute a part hereof and shall not affect the meaning
or construction of any provision hereof.

      Section 8.6 Severability. In the event any one or more of the provisions
contained in this Security Agreement or in any other Security Document should be
held invalid, illegal or unenforceable in any respect, the validity, legality
and enforceability of the remaining provisions contained herein and therein
shall not in any way be affected or impaired thereby. The parties shall endeavor
in good-faith negotiations to replace the invalid, illegal or unenforceable
provisions with valid provisions the economic effect of which comes as close as
possible to that of the invalid, illegal or unenforceable provisions.

      Section 8.7 Governing Law. This Security Agreement shall be governed by
and construed in accordance with the laws of the State of New York.

      Section 8.8 Waiver of Jury Trial. EACH OF THE GRANTORS, THE COLLATERAL
AGENT AND THE OTHER FINANCIAL INSTITUTIONS DOES HEREBY IRREVOCABLY WAIVE ANY AND
ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO
THIS AGREEMENT, ANY OF THE NOTES, ANY LETTERS OF CREDIT, ANY OTHER CREDIT
DOCUMENT OR ANY OF THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY.

      Section 8.9 Forum Selection and Consent to Jurisdiction; Damages. ANY
LITIGATION BASED HEREON OR ACTION OF THE COLLATERAL AGENT, THE FINANCIAL
INSTITUTIONS OR THE GRANTORS IN CONNECTION HEREWITH MAY BE BROUGHT AND
MAINTAINED IN THE COURTS OF THE STATE OF NEW YORK OR IN THE UNITED STATES
DISTRICT COURT FOR THE SOUTHERN DISTRICT OF NEW YORK. ANY SUIT SEEKING
ENFORCEMENT AGAINST ANY COLLATERAL MAY BE BROUGHT, AT THE COLLATERAL AGENT'S
OPTION, IN THE COURTS OF ANY JURISDICTION WHERE SUCH COLLATERAL MAY BE FOUND.
EACH GRANTOR IRREVOCABLY CONSENTS TO THE SERVICE OF PROCESS BY REGISTERED MAIL,
POSTAGE PREPAID, OR BY PERSONAL SERVICE WITHIN OR WITHOUT THE STATE OF NEW YORK
AT THE ADDRESS FOR NOTICES TO THE COMPANY SPECIFIED IN SECTION 8.2 OF THE CREDIT
AGREEMENT. EACH GRANTOR HEREBY EXPRESSLY AND IRREVOCABLY WAIVES, TO THE FULLEST
EXTENT PERMITTED BY LAW, ANY OBJECTION WHICH IT MAY HAVE OR HEREAFTER MAY HAVE
TO THE LAYING OF VENUE OF ANY SUCH LITIGATION BROUGHT IN ANY SUCH COURT REFERRED
TO ABOVE AND ANY CLAIM THAT ANY SUCH LITIGATION HAS BEEN BROUGHT

<PAGE>

IN AN INCONVENIENT FORUM. TO THE EXTENT THAT ANY GRANTOR HAS OR HEREAFTER MAY
ACQUIRE ANY IMMUNITY FROM JURISDICTION OF ANY COURT OR FROM ANY LEGAL PROCESS
(WHETHER THROUGH SERVICE OR NOTICE, ATTACHMENT PRIOR TO JUDGMENT, ATTACHMENT IN
AID OF EXECUTION OR OTHERWISE) WITH RESPECT TO ITSELF OR ITS PROPERTY, SUCH
GRANTOR HEREBY IRREVOCABLY WAIVES TO THE FULLEST EXTENT PERMITTED BY LAW SUCH
IMMUNITY IN RESPECT OF ITS OBLIGATIONS UNDER THIS SECURITY AGREEMENT. EACH OF
THE GRANTORS, THE COLLATERAL AGENT, AND THE OTHER FINANCIAL INSTITUTIONS HEREBY
IRREVOCABLY AND UNCONDITIONALLY WAIVES, TO THE FULLEST EXTENT IT MAY EFFECTIVELY
DO SO UNDER APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO CLAIM OR RECOVER IN ANY
ACTION REFERRED TO IN THIS SECTION 8.9 ANY EXEMPLARY, PUNITIVE, SPECIAL OR
CONSEQUENTIAL DAMAGES; PROVIDED THAT NOTHING HEREIN SHALL CONSTITUTE A WAIVER BY
THE AGENT, THE GRANTOR, ANY ISSUING BANK OR ANY BANK OF THE RIGHT TO RECEIVE
FULL PAYMENT OF ALL SECURED OBLIGATIONS. GRANTOR HEREBY APPOINTS TWC TO SERVE AS
ITS AGENT FOR SERVICE OF PROCESS ON BEHALF OF GRANTOR IN CONNECTION WITH THE
CREDIT DOCUMENTS AND THE OBLIGATIONS.

      Section 8.10 Collateral Agent May Perform. If any one or more of the
Grantors fails to perform any agreement contained herein, Collateral Agent may
itself perform, or cause the performance of, such agreement, and the reasonable
expenses of Collateral Agent incurred in connection therewith shall be payable
by such Grantor.

      Section 8.11 Termination; Release. When all of the Secured Obligations
have been satisfied or irrevocably paid in full and all Commitments have expired
or are terminated, this Security Agreement shall terminate (except as provided
in Section 8.12 of this Security Agreement), and Collateral Agent, at the
expense of the Grantors, will promptly execute and deliver to each of the
Grantors the proper instruments acknowledging the termination of this Security
Agreement, and will duly assign, transfer and deliver to any one or more of the
Grantors (without recourse and without any representation or warranty of any
kind) such of the Collateral as may be in the possession of Collateral Agent and
has not theretofore been sold or otherwise applied or released pursuant to this
Security Agreement, and shall take such other action, at the Grantors' expense,
as the Grantors may reasonably request to effectuate the foregoing. To the
extent any Collateral is sold as permitted under the Credit Agreement, such
Collateral (unless sold to Company or any of its Subsidiaries) shall be sold
free and clear of the Liens created hereby (which Liens shall be automatically
released upon such permitted sale), and the Collateral Agent shall be authorized
to take any actions deemed appropriate by it in order to effect the foregoing.
Promptly upon the request of the Grantors, at the Company's expense, the
Collateral Agent will take such action and execute and deliver such instruments
and documents necessary to release the liens and security interests created
hereby on the Collateral sold or otherwise disposed of, such instruments and
documents to be in form and substance reasonably satisfactory to the Collateral
Agent.

      Section 8.12 Reinstatement. This Security Agreement shall continue to be
effective or be reinstated, as the case may be, if at any time any amount
received by Collateral Agent in

<PAGE>

respect of the Secured Obligations is rescinded or must otherwise be restored or
returned by any Financial Institution upon the insolvency, bankruptcy,
dissolution, liquidation or reorganization of any Borrower or any one or more of
the Grantors, or upon the appointment of any intervenor or conservator of, or
trustee or similar official for, any one or more of the Grantors or any
substantial part of its Collateral, or otherwise, all as though such payments
had not been made.

      Section 8.13 Counterparts. This Security Agreement may be executed in any
number of counterparts and by different parties hereto in separate counterparts,
each of which, when so executed, shall be deemed to be an original, and all of
which taken together shall constitute one and the same agreement. Delivery of an
executed counterpart of a signature page to this Security Agreement by
telecopier shall be as effective as delivery of an original executed counterpart
of this Security Agreement.

      Section 8.14 No Third Party Beneficiaries. The agreements of the parties
hereto are solely for the benefit of the Grantors, the Collateral Agent and the
Financial Institutions, and no Person (other than the parties hereto and the
Financial Institutions) shall have any rights hereunder.

      Section 8.15 Information. Each Grantor will furnish to Collateral Agent
from time to time statements and schedules further identifying and describing
the Collateral of such Grantor and such other reports in connection with such
Collateral as Collateral Agent may reasonably request, all in reasonable detail.

      Section 8.16 Costs and Expenses. Each Grantor shall pay on demand to
Collateral Agent the amount of any and all reasonable expenses that Collateral
Agent may incur in connection with this Security Agreement in accordance with
Section 8.4 of the Credit Agreement.

Schedule I State of Organization and Addresses of Grantors

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

<PAGE>

      IN WITNESS WHEREOF, the parties hereto have caused this Security Agreement
to be executed and delivered by their duly authorized officers as of the date
first above written.

                                        COLLATERAL AGENT:

                                        CITICORP USA, INC., solely in its
                                        capacity as Collateral Agent

                                        By: /s/ Todd J. Mogil
                                            -----------------
                                        Name:  Todd J. Mogil
                                        Title: Vice President

                     [WESTERN MIDSTREAM SECURITY AGREEMENT]

<PAGE>

                                        GRANTORS:

                                        WILLIAMS FIELD SERVICES COMPANY, a
                                        Delaware corporation

                                        By: /s/ Travis N. Campbell
                                            ----------------------
                                        Name:  Travis N. Campbell
                                        Title: Assistant Treasurer

                                        WILLIAMS GAS PROCESSING COMPANY, a
                                        Delaware corporation

                                        By: /s/ Travis N. Campbell
                                            ----------------------
                                        Name:  Travis N. Campbell
                                        Title: Assistant Treasurer

                                        WILLIAMS GAS PROCESSING - WAMSUTTER
                                        COMPANY, a Delaware corporation

                                        By: /s/ Travis N. Campbell
                                            ----------------------
                                        Name:  Travis N. Campbell
                                        Title: Assistant Treasurer

                     [WESTERN MIDSTREAM SECURITY AGREEMENT]

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