EXHIBIT 4.8
                                                                   ------------


===============================================================================


                   FIFTH AMENDED AND RESTATED CREDIT AGREEMENT


                                      among

                         CHESAPEAKE ENERGY CORPORATION,

                   CHESAPEAKE EXPLORATION LIMITED PARTNERSHIP,
                                  as Borrower,

            BANK OF AMERICA, N.A. and UNION BANK OF CALIFORNIA, N.A.,
                          as Co-Administrative Agents,

                         UNION BANK OF CALIFORNIA, N.A.,
            as Administrative Paying, Receiving and Collateral Agent,

                                       and
                                  BNP PARIBAS,

                           CALYON NEW YORK BRANCH and

                                  SUNTRUST BANK
                           as Co-Documentation Agents

                                       and

              The Several Lenders from Time to Time Parties Hereto,

                          Dated as of January 28, 2005


                         BANC OF AMERICA SECURITIES LLC
                                       and
                         UNION BANK OF CALIFORNIA, N.A.
                  as Joint Lead Arrangers and Co-Book Managers

===============================================================================



                                TABLE OF CONTENTS


SECTION 1.        DEFINITIONS.................................................1

         1.1. Defined Terms...................................................1
         1.2. Other Definitional Provisions..................................24
         1.3. Letter of Credit Amounts.......................................25

SECTION 2.        AMOUNT AND TERMS OF REVOLVING COMMITMENTS..................26

         2.1. Revolving Commitments..........................................26
         2.2. Procedure for Revolving Loan Borrowing.........................26
         2.3. Commitment Fees, etc...........................................26
         2.4. Termination or Reduction of Revolving Commitments..............27
         2.5. The Letter of Credit Commitment................................27
         2.6. Procedures for Issuance and Amendment of Letters of Credit.....29
         2.7. Drawings and Reimbursements; Funding of Participations.........30
         2.8. Repayment of Participations....................................31
         2.9. Obligations Absolute.:.........................................32
         2.10. Role of each Issuing Lender...................................33
         2.11. Cash Collateral...............................................34
         2.12. Applicability of ISP and UCP..................................34
         2.13. Letter of Credit Fees.........................................34
         2.14. Borrowing Base and Collateral Value Determination.............35

SECTION 3.        GENERAL PROVISIONS APPLICABLE TO REVOLVING LOANS AND
                  LETTERS OF CREDIT..........................................37

         3.1. Optional Prepayments...........................................37
         3.2. Mandatory Prepayments..........................................37
         3.3. Conversion and Continuation Options............................39
         3.4. Limitations on Eurodollar Tranches.............................40
         3.5. Interest Rates and Payment Dates...............................40
         3.6. Computation of Interest and Fees...............................40
         3.7. Inability to Determine Interest Rate...........................41
         3.8. Pro Rata Treatment and Payments................................41
         3.9. Requirements of Law............................................43
         3.10. Taxes.........................................................44
         3.11. Indemnity.....................................................46
         3.12. Change of Lending Office......................................46
         3.13. Replacement of Lenders........................................47
         3.14. Evidence of Debt..............................................47
         3.15. Illegality....................................................48
         3.16. Sharing of Payments by Lenders................................48

                                       i



SECTION 4.        REPRESENTATIONS AND WARRANTIES.............................49
         4.1. Financial Condition............................................49
         4.2. No Change; No Internal Control Event...........................49
         4.3. Existence; Compliance with Law.................................49
         4.4. Power; Authorization; Enforceable Obligations..................49
         4.5. No Legal Bar...................................................50
         4.6. Litigation.....................................................50
         4.7. No Default.....................................................50
         4.8. Ownership of Property; Liens...................................50
         4.9. Intellectual Property..........................................51
         4.10. Taxes.........................................................51
         4.11. Federal Regulations...........................................51
         4.12. Labor Matters.................................................51
         4.13. ERISA.........................................................51
         4.14. Investment Company Act; Other Regulations.....................52
         4.15. Subsidiaries..................................................52
         4.16. Use of Proceeds...............................................52
         4.17. Environmental Matters.........................................52
         4.18. Accuracy of Information, etc..................................53
         4.19. Security Documents............................................54
         4.20. Solvency......................................................54
         4.21. Senior Debt Limit.............................................54
         4.22. Subsidiary Guarantors.........................................54

SECTION 5.        CONDITIONS PRECEDENT.......................................54

         5.1. Conditions to Initial Extension of Credit......................54
         5.2. Conditions to Each Extension of Credit.........................56

SECTION 6.        AFFIRMATIVE COVENANTS......................................56

         6.1. Financial Statements...........................................56
         6.2. Certificates; Other Information................................57
         6.3. Payment of Obligations.........................................60
         6.4. Maintenance of Existence; Compliance...........................60
         6.5. Maintenance of Property; Insurance.............................60
         6.6. Inspection of Property; Books and Records; Discussions.........61
         6.7. Notices........................................................61
         6.8. Environmental Laws.............................................62
         6.9. Collateral Coverage and Guarantees.............................62
         6.10. Further Assurances............................................62

                                       ii



SECTION 7.        NEGATIVE COVENANTS.........................................63

         7.1. Financial Condition Covenants..................................63
         7.2. Indebtedness...................................................64
         7.3. Liens..........................................................66
         7.4. Fundamental Changes............................................67
         7.5. Disposition of Property........................................68
         7.6. Restricted Payments............................................69
         7.7. Investments....................................................70
         7.8. Optional Payments and Modifications of
              Certain Debt Instruments.......................................71
         7.9. Transactions with Affiliates...................................72
         7.10. Sales and Leasebacks..........................................72
         7.11. Changes in Fiscal Periods.....................................72
         7.12. Negative Pledge Clauses.......................................72
         7.13. Clauses Restricting Subsidiary Distributions..................72
         7.14. Take-or-Pay Contracts.........................................73
         7.15. Lines of Business.............................................73
         7.16. Senior Debt Limit.............................................73
         7.17. Preferred Stock Issuance......................................73

SECTION 8.        EVENTS OF DEFAULT..........................................74


SECTION 9.        THE AGENTS.................................................77

         9.1. Appointment and Authority......................................77
         9.2. Rights as a Lender.............................................77
         9.3. Exculpatory Provisions.........................................77
         9.4. Reliance by Agent..............................................78
         9.5. Delegation of Duties...........................................78
         9.6. Resignation of Agent...........................................78
         9.7. Non-Reliance on Agent and Other Lenders........................79
         9.8. No Other Duties, Etc...........................................79
         9.9. Administrative Agent May File Proofs of Claim..................79

SECTION 10.       MISCELLANEOUS..............................................80

         10.1. Amendments and Waivers........................................80
         10.2. Notices; Effectiveness; Electronic Communication..............81
         10.3. No Waiver; Cumulative Remedies................................83
         10.4. Survival of Representations and Warranties....................83
         10.5. Expenses; Indemnification; Damage Waiver......................83
         10.6. Successors and Assigns; Participations and Assignments........85
         10.7. Set-off.......................................................88
         10.8. Counterparts..................................................88
         10.9. Severability..................................................88
         10.10. Integration..................................................89
         10.11. GOVERNING LAW................................................89
         10.12. Submission To Jurisdiction; Waivers..........................89
         10.13. Acknowledgments..............................................89
         10.14. Releases of Guarantees and Liens;
                Designation of Subsidiaries..................................90
         10.15. Confidentiality..............................................91
         10.16. WAIVERS OF JURY TRIAL........................................92
         10.17. Special Provisions...........................................92
         10.18. Limitation on Interest.......................................93
         10.19. USA Patriot Act Notice.......................................93

                                      iii



SCHEDULES:

1.1A     Commitments
1.1B     Mortgaged Property
1.1C     Existing Letters of Credit
4.1      Financial Condition
4.4      Consents, Authorizations, Filings and Notices
4.6      Litigation
4.15(a)  Subsidiaries
4.15(b)  Outstanding  Subscriptions,   Options,  Warrants,  Calls,  Rights  etc.
         Relating to Capital Stock of the Company or any Subsidiary
4.17(d)  Environmental  Matters 4.17(f)  NonCompliance  with  Environmental Laws
         4.19 Mortgage Filing  Jurisdictions  5.1(i) Existing  Mortgages  7.2(d)
         Existing  Indebtedness  7.3(f) Existing Liens 7.7(m)  Investments  10.2
         Notices

EXHIBITS:

A        Form of Guarantee Agreement
B        Form of Compliance Certificate
C        Form of Closing Certificate
D        Form of Mortgage
E        Form of Assignment and Assumption
F        Form of Legal Opinion of Commercial Law Group, P.C.
G        Form of Exemption Certificate
H        Form of Revolving Note
I        Form of Pari Passu Hedging Obligation Notice
J        Requirements for Hedging Support Credit Facility


                                       iv



FIFTH AMENDED AND RESTATED CREDIT AGREEMENT, dated as of January 28, 2005, among
CHESAPEAKE EXPLORATION LIMITED PARTNERSHIP, an Oklahoma limited partnership (the
"BORROWER"),   CHESAPEAKE  ENERGY  CORPORATION,  an  Oklahoma  corporation  (the
"COMPANY"),  BANK OF  AMERICA,  N.A.  and UNION  BANK OF  CALIFORNIA,  N.A.,  as
co-administrative  agents,  UNION BANK OF  CALIFORNIA,  N.A., as  administrative
paying, receiving and collateral agent, the Issuing Lenders provided herein, BNP
PARIBAS,  CALYON NEW YORK BRANCH and SUNTRUST BANK, as  Co-Documentation  Agents
and the several banks and other financial  institutions or entities from time to
time parties to this Agreement (the "LENDERS").

                              W I T N E S S E T H:

         WHEREAS,  the  Company and the  Borrower  wish to amend and restate the
Fourth  Amended  and  Restated  Credit  Agreement,  dated as of May 7,  2004 (as
amended,  the "EXISTING CREDIT  AGREEMENT") to obtain a senior secured revolving
credit facility in an aggregate  principal amount of up to  $1,250,000,000,  and
the  parties  hereto  are  willing  to amend and  restate  the  Existing  Credit
Agreement as set forth herein.

         NOW, THEREFORE, in consideration of the premises set forth, the parties
hereto hereby agree as follows:

                             SECTION 1. DEFINITIONS

          1.1.  DEFINED TERMS.  As used in this  Agreement,  the terms listed in
this  SECTION 1.1 shall have the  respective  meanings set forth in this SECTION
1.1.

                "ADJUSTED CONSOLIDATED NET TANGIBLE ASSETS":
                   -----------------------------------------
as defined in the Indentures, as applicable.

                "ADJUSTED  SPE BASIS  PROJECTED  PRODUCTION":  for any month the
total of (a) SPE Basis  Projected  Production  for such  month  attributable  to
reserves  that are,  at the time of  determination,  classified  as  "Producing"
reserves  plus  (b)  25%  of SPE  Basis  Projected  Production  for  such  month
attributable  to "Proved"  reserves that are not, at the time of  determination,
classified as "Producing" reserves.

                "ADMINISTRATIVE  AGENT":  Union  Bank  of  California,  N.A.  as
administrative paying,  receiving and collateral agent, or any successor in such
capacity.

                "ADMINISTRATIVE  QUESTIONNAIRE":   a  questionnaire  in  a  form
supplied by the Administrative Agent.

                "AFFILIATE":  with  respect to any Person,  another  Person that
directly,  or indirectly through one or more intermediaries,  Controls
or is Controlled by or is under common Control with the Person specified.

                                       1


                "AGENTS":  the collective  reference to the Administrative Agent
and the  Co-Administrative  Agents;  "AGENT" means such Agents  individually and
collectively.

                "AGGREGATE EXPOSURE": with respect to any Lender at any time, an
amount equal to the amount of such Lender's Revolving  Commitment then in effect
or, if the  Revolving  Commitments  have  been  terminated,  the  amount of such
Lender's Revolving Extensions of Credit then outstanding.

                "AGGREGATE EXPOSURE  PERCENTAGE":  with respect to any Lender at
any time,  the ratio  (expressed  as a percentage)  of such  Lender's  Aggregate
Exposure at such time to the Aggregate Exposure of all Lenders at such time.

                "AGREEMENT":  this Fifth Amended and Restated Credit  Agreement,
as amended, supplemented or otherwise modified from time to time.

                "APPLICABLE  MARGIN":  for each Type of Revolving  Loan,  on any
day,  the rate  per  annum  set  forth at the  appropriate  intersection  at the
relevant  column  heading below based on the  Applicable  Rating Level as of the
close of business on the immediately preceding Business Day:

                  APPLICABLE       BASE RATE LOANS     EURODOLLAR LOANS
                  ----------       ---------------     ----------------
                 RATING LEVEL
                 ------------

                  Level I                .25%                1.75%

                  Level II                 0%                1.375%

                  Level III                0%                1.25%

                  Level IV                 0%                1.125%


                "APPLICABLE RATING LEVEL":  means the level set forth below that
corresponds  to the  ratings  issued  from time to time by Moody's  and S&P,  as
applicable to the Index Debt:


                                       MOODY'S                 S&P
                                       -------                 ---

                  Level I                <B1                   <B+
                                         -                     -

                  Level II               Ba3                   BB-

                  Level III              Ba2                   BB

                  Level IV              >Ba1                   >BB+
                                        -                      -

For purposes of the foregoing, (i) "=" means a rating equal to or more favorable
than; (ii) "=" means a rating equal to or less favorable than;  (iii) if neither
S&P nor Moody's maintains a rating for the Index Debt, Level I shall apply; (iv)
if the  ratings  for the Index Debt fall  within  different  levels that are one
level apart, the more favorable of the two ratings shall apply (for example,  if
the Moody's rating is Ba3 and the S&P rating is BB, Level III shall apply);  (v)
if the  ratings for the Index Debt fall  within  different  levels that are more
than one level apart,  the level that is one level less  favorable than the more
favorable of the two ratings shall apply (for example,  if the Moody's rating is
Ba3 and the S&P rating is BB+, Level III shall apply; (vi) if only one of S&P or
Moody's  provides a rating for the Index Debt, the level  corresponding  to such
level shall apply;  and (vii) if either of the Rating  Agencies shall change its
ratings  nomenclature  prior to the date all Obligations  have been paid and the
Commitments  canceled,  the Borrower and the Majority Lenders shall negotiate in
good faith to amend the  references  to specific  ratings in this  definition to
reflect such change,  and pending such amendment,  if an appropriate  Applicable
Rating Level is otherwise not  determinable  based upon the foregoing  grid, the
last Applicable Rating Level in effect at the time of such change shall continue
to apply. A change in the  Applicable  Rating Level shall be effective as of the
date on which a change in the  rating is first  announced  irrespective  of when
notice  of  such  change  shall  have  been  furnished  by the  Borrower  to the
Administrative Agent and the Lenders.

                                       2


                "APPLICATION":  an  application,  in such  form  as the  Issuing
Lender may specify from time to time,  requesting  the Issuing  Lender to open a
Letter of Credit.

                "APPROVED FUND": any Fund that is administered or managed by (a)
a Lender,  (b) an  Affiliate  of a Lender or (c) an entity or an Affiliate of an
entity that administers or manages a Lender

                "ASSIGNMENT AND ASSUMPTION":  means an assignment and assumption
entered into by a Lender and an Eligible Assignee (with the consent of any party
whose   consent  is  required   by  SECTION   10.6(B),   and   accepted  by  the
Co-Administrative  Agents,  in substantially  the form of EXHIBIT E or any other
form approved by the Co-Administrative Agents.

                "AVAILABLE REVOLVING COMMITMENT":  as to any Lender at any time,
an amount equal to the excess, if any, of (a) such Lender's Revolving Commitment
then in effect  OVER (b) such  Lender's  Revolving  Extensions  of  Credit  then
outstanding.

                "BASE RATE": for any day, a rate per annum (rounded upwards,  if
necessary,  to the next 1/16 of 1%) equal to the  greater  of (a) the  Reference
Rate in effect on such day and (b) the Federal Funds Effective Rate in effect on
such day plus 0.50%. For purposes  hereof:  "REFERENCE RATE" shall mean the rate
of  interest  per annum  publicly  announced  from time to time by Union Bank of
California,  N.A. as its "reference rate" (the Reference Rate not intended to be
the  lowest  rate of  interest  charged  by Union Bank of  California,  N.A.  in
connection  with  extensions of credit to debtors).  Any change in the Base Rate
due to a change in the Reference Rate or the Federal Funds  Effective Rate shall
be effective as of the opening of business on the  effective  day of such change
in the Reference Rate or the Federal Funds Effective Rate, respectively.

                "BASE  RATE  LOANS":   Revolving  Loans  the  rate  of  interest
applicable to which is based upon the Base Rate.

                "BOARD": the Board of Governors of the Federal Reserve System of
the United States (or any successor).

                "BORROWER": as defined in the preamble to this Agreement.

                "BORROWER MATERIALS": as defined in SECTION 6.2.

                "BORROWING  BASE":  at any time the Borrowing Base is in effect,
the amount of the  "Borrowing  Base" as determined  in  accordance  with SECTION
2.14,  as  reduced  by  the  Borrower  pursuant  to  SECTION  3.2.

                "BORROWING BASE DEFICIENCY": as defined in SECTION 3.2(B).

                "BORROWING  BASE  DEFICIENCY  NOTICE":  as  defined  in  SECTION
3.2(B).

                "BORROWING BASE PERIOD": as defined in SECTION 2.14(B).

                "BORROWING  DATE": any Business Day specified by the Borrower as
a date on which the  Borrower  requests  the  Lenders  to make  Revolving  Loans
hereunder.

                "BUDGET   BASIS   PROJECTED   PRODUCTION":   at  any   time   of
determination,  the projected  production of oil or gas (measured by volume unit
or BTU  equivalent,  not sales price) from properties and interests owned by any
Group Member  which are located in or offshore of the United  States and Canada,
as such production is projected (i) in the most recent report delivered pursuant
to SECTION  6.2(C) for  purposes of  management  planning  and  budgeting  after
deducting  projected  production  from any properties or interests sold or under
contract  for sale  that had been  included  in such  report  and  after  adding
projected  production  from  any  properties  or  interests  that  had not  been
reflected in such report.

                "BUSINESS": as defined in SECTION 4.17(B).

                "BUSINESS DAY": a day other than a Saturday, Sunday or other day
on which  commercial  banks  in New York  City or Los  Angeles,  California  are
authorized or required by law to close,  PROVIDED,  that with respect to notices
and  determinations  in connection  with, and payments of principal and interest
on, Eurodollar Loans, such day is also a day for trading by and between banks in
Dollar deposits in the interbank eurodollar market.

                                       3


                "CAPITAL LEASE  OBLIGATIONS":  as to any Person, the obligations
of such  Person  to pay rent or  other  amounts  under  any  lease of (or  other
arrangement  conveying  the  right  to use)  real  or  personal  property,  or a
combination  thereof,  which  obligations  are  required  to be  classified  and
accounted  for as capital  leases on a balance  sheet of such Person  under GAAP
and, for the purposes of this Agreement,  the amount of such  obligations at any
time  shall  be the  capitalized  amount  thereof  at such  time  determined  in
accordance with GAAP.

                "CAPITAL STOCK": any and all shares,  interests,  participations
or other equivalents (however designated) of capital stock of a corporation, any
and all  equivalent  ownership  interests in a Person (other than a corporation)
and any and all  warrants,  rights or options to purchase any of the  foregoing,
including, without limitation, any preferred stock.

                "CASH  COLLATERALIZE":  to pledge and deposit with or deliver to
the  Administrative  Agent,  for the  benefit  of the  Issuing  Lenders  and the
Lenders, as collateral for the L/C Obligations, cash or deposit account balances
pursuant  to   documentation   in  form  and  substance   satisfactory   to  the
Administrative  Agent  and the  Issuing  Lenders  (which  documents  are  hereby
consented  to by the  Lenders).  Derivatives  of such  term  have  corresponding
meanings.  "CASH  COLLATERAL" means the cash or deposit account balances subject
to such pledge and deposit.  References to the amount Cross Collateralized shall
be the  lesser  of the  amount  of the Cash  Collateral  and the  amount  of L/C
Obligations secured thereby.

                "CASH EQUIVALENTS": means the following kinds of instruments if,
in the case of instruments referred to in clauses (i)-(iv) below, on the date of
purchase  or other  acquisition  of any such  instrument  by the  Company or any
Subsidiary,  the  remaining  term to  maturity  is not more than one  year;  (i)
readily  marketable  obligations  issued  or  unconditionally  guaranteed  as to
principal  of and  interest  thereon by the  United  States of America or by any
agency or authority controlled or supervised by and acting as an instrumentality
of the United States of America; (ii) repurchase  obligations for instruments of
the type  described in clause (i) for which  delivery of the  instrument is made
against payment;  (iii)  obligations  (including,  but not limited to, demand or
time deposits,  bankers'  acceptances  and  certificates of deposit) issued by a
depositary institution or trust company incorporated or doing business under the
laws of the United  States of  America,  any state  thereof or the  District  of
Columbia or a branch or subsidiary of any such  depositary  institution or trust
company  operating  outside the United States,  provided,  that such  depositary
institution  or  trust  company  has,  at the  time  of the  Company's  or  such
Subsidiary's  investment  therein or contractual  commitment  providing for such
investment,  capital  surplus  or  undivided  profits  (as of the  date  of such
institution's  most  recently  published  financial  statements)  in  excess  of
$500,000,000;   (iv)  commercial  paper  issued  by  any  corporation,  if  such
commercial  paper  has,  at the  time  of  the  Company's  or  any  Subsidiary's
investment  therein or  contractual  commitment  providing for such  investment,
credit ratings of A-1 (or higher) by S&P and P-1 (or higher) by Moody's; and (v)
money market mutual or similar funds having assets in excess of $500,000,000.

                "CLOSING DATE":  the date on which the conditions  precedent set
forth in SECTION 5.1 shall have been satisfied, which date is January 28, 2005.

                "CO-ADMINISTRATIVE  AGENTS": Bank of America N.A. and Union Bank
of  California,  N.A.,  as  co-administrative  agents,  or any successor in such
capacity to either of them.

                "CODE":  the Internal Revenue Code of 1986, as amended from time
to time.

                "COLLATERAL":  all  property of the Loan  Parties,  now owned or
hereafter acquired, upon which a Lien is purported to be created by any Security
Document.

                "COLLATERAL  COVERAGE RATIO":  at any time, the ratio of (a) the
Collateral  Value to (b) the greater of (i) the lesser of the Borrowing Base, if
applicable,  or the Total  Revolving  Commitments  and (ii) the Total  Revolving
Extensions of Credit then outstanding.

                "COLLATERAL DEFICIENCY DATE": as defined in SECTION 3.2(A).

                "COLLATERAL RELEASE DATE": as defined in SECTION 2.14(G).

                "COLLATERAL  VALUE":  on any date,  the net present value (using
the  average  of  the   discount   rates  then   customarily   utilized  by  the
Co-Administrative  Agents  for  collateral  valuation  purposes,  which,  on the
Closing  Date,  is a 9%  discount  rate) of the  projected  future net  revenues
attributable  to the portion of the reserves  categorized  as "Producing" of the
Mortgaged  Properties  and  attributable  to  the  Other  Proved  Reserves,   as
determined from time to time in accordance with SECTION 2.14; PROVIDED, that the

                                       4


portion of the  Collateral  Value  attributable  to the net present value (as so
determined) of the Mortgaged Properties owned by the Guarantors (the "GUARANTORS
COLLATERAL  VALUE") shall be limited such that the Guarantors  Collateral  Value
shall not exceed 25% of the resulting total Collateral  Value;  PROVIDED FURTHER
that the portion of the  Collateral  Value  attributed to Other Proved  Reserves
shall be limited such that the  Collateral  Value  attributable  to Other Proved
Reserves shall not exceed 25% of the resulting total Collateral Value.

                "COMMITMENT  FEE RATE":  on any day the rate per annum set forth
below based on the  Applicable  Rating  Level as of the close of business on the
preceding Business Day:

                      APPLICABLE RATING             COMMITMENT FEE RATE
                      -----------------             -------------------
                           LEVEL
                           -----

                           Level I                         .375%

                           Level II                        .30%

                           Level III                       .30%

                           Level IV                        .25%

                "COMMONLY   CONTROLLED  ENTITY":  an  entity,   whether  or  not
incorporated,  that is under common  control with the Company within the meaning
of Section  4001 of ERISA or is part of a group that  includes  the  Company and
that is treated as a single employer under Section 414 of the Code.

                "COMPANY": as defined in the preamble to this Agreement.

                "COMPANY REPORT": as defined in SECTION 6.2(D).

                "COMPLIANCE  CERTIFICATE":  a  certificate  duly  executed  by a
Responsible Officer substantially  in the form of EXHIBIT B.

                "CONSOLIDATED  EBITDA": for any period,  Consolidated Net Income
for such period  PLUS,  without  duplication  and to the extent  reflected  as a
charge in the statement of such Consolidated Net Income for such period, the sum
of (a) income tax expense, (b) interest expense, (c) depletion, depreciation and
amortization  expense,  (d) any  extraordinary  charges or losses  determined in
accordance with GAAP, and (e) any other non-cash  charges,  non-cash expenses or
non-cash losses of any Group Member for such period  (excluding any such charge,
expense or loss incurred in the ordinary course of business that  constitutes an
accrual of or reserve for cash charges for any future period) including non-cash
losses or charges  resulting from the requirements of SFAS 133 or 143;  PROVIDED
that cash payments made during such period or in any future period in respect of
such non-cash charges,  expenses or losses (other than any such excluded charge,
expense or loss as described  above) shall be subtracted from  Consolidated  Net
Income in calculating  Consolidated EBITDA for the period in which such payments
are  made,  and  MINUS,  to  the  extent  included  in  the  statement  of  such
Consolidated Net Income for such period, the sum of (a) interest income, (b) any
extraordinary  income or gains  determined in  accordance  with GAAP and (c) any
other non-cash  income or gain  (excluding any items that represent the reversal
of any accrual of, or cash  reserve for,  anticipated  cash charges in any prior
period that are described in the  parenthetical  to clause (e) above)  including
any non-cash income or gains resulting from the requirements of SFAS 133 or 143,
all as determined on a consolidated  basis in accordance with GAAP. For purposes
of SECTION  7.1(B) and 7.2(L)  only,  and for no other  purpose,  if,  since the
beginning  of the four  fiscal  quarter  period  ending  on the  date for  which
Consolidated  EBITDA  is  determined,  any  Group  Member  shall  have  made any
acquisition or Disposition of assets other than from or to another Group Member,
shall have  consolidated  or merged with or into any Person  (other than another
Group  Member),  shall have  disposed of the equity  interests of a Group Member
other than from or to another Group Member or shall have made any acquisition of
a Person that becomes a Group  Member,  Consolidated  EBITDA shall be calculated
giving  pro  forma   effect   thereto  as  if  the   acquisition,   Disposition,
consolidation  or merger had occurred on the first day of such period.  Such pro
forma  effect  shall be  determined  (i) in good  faith by the  chief  financial
officer, principal accounting officer or treasurer of the Company and acceptable
to  Co-Administrative  Agents, and (ii) without giving effect to any anticipated
or proposed change in operations,  revenues, expenses or other items included in
the computation of Consolidated EBITDA.

                                       5


                "CONSOLIDATED  FIXED CHARGE COVERAGE RATIO": for any period, the
ratio of (a)  Consolidated  EBITDA  for such  period to (b)  Consolidated  Fixed
Charges for such period.

                "CONSOLIDATED  FIXED CHARGES":  for any period, the sum (without
duplication) of (a) Consolidated  Interest Expense for such period,  and (b) all
dividends  (other  than  dividends  payable in Capital  Stock)  declared  by the
Company and  attributable  to such  period.  For purposes of this  Agreement,  a
dividend is "attributed" to the fiscal quarter immediately preceding the quarter
in which such dividend is actually declared by the Company.

                "CONSOLIDATED  INDEBTEDNESS":  the  indebtedness  of  the  Group
Members  (without  duplication)  of the type described in clauses (a), (b), (c),
(d),  (e), (g) and (h) of the  definition  of  Indebtedness  as  determined on a
consolidated basis in accordance with GAAP.

                "CONSOLIDATED  INTEREST EXPENSE": for any period, the sum of (a)
all  interest,  commitment  fees  and  loan  fees  in  respect  of  Indebtedness
(including that  attributable to Capital Lease  Obligations) of any Group Member
deducted in determining  Consolidated Net Income for such period,  together with
all interest,  commitment fees and loan fees capitalized or deferred during such
period and not deducted in determining  Consolidated  Net Income for such period
but  excluding   amortization  of  interest,   commitment  fees  and  loan  fees
capitalized or deferred during an earlier period plus (b) all fees, expenses and
charges in respect  of  letters  of credit  issued for the  account of any Group
Member deducted in determining Consolidated Net Income for such period, together
with all such  fees,  expenses  and  charges  in  respect  of  letters of credit
capitalized  or  deferred  during such  period and not  deducted in  determining
Consolidated  Net Income for such period,  all as determined  on a  consolidated
basis in  accordance  with  GAAP.  Revenues  and  expenses  derived  from  Hedge
Agreements  related  to  interest  rates or  dividend  rates  will be treated as
adjustments to interest expense for purposes of this definition.

                "CONSOLIDATED NET INCOME":  for any period, the consolidated net
income (or loss) of the Group  Members,  determined on a  consolidated  basis in
accordance  with GAAP;  PROVIDED that there shall be excluded (a) the income (or
deficit) of any Person  accrued prior to the date it becomes a Subsidiary of the
Company  or is  merged  into or  consolidated  with  the  Company  or any of its
Subsidiaries except for purposes of SECTION 7.1(B) and 7.2(L) as provided in the
definition  of  Consolidated  EBITDA,  (b) the income (or deficit) of any Person
(other  than a  Subsidiary  of the  Company)  in which the Company or any of its
Subsidiaries  has an  ownership  interest,  except to the  extent  that any such
income is actually  received by the  Company or such  Subsidiary  in the form of
dividends or similar  distributions  and (c) the  undistributed  earnings of any
Subsidiary  of the  Company to the  extent  that the  declaration  or payment of
dividends  or  similar  distributions  by  such  Subsidiary  is not at the  time
permitted by the terms of any Contractual  Obligation (other than under any Loan
Document) or Requirement of Law applicable to such Subsidiary.

                "CONSOLIDATED TOTAL CAPITALIZATION":  Consolidated  Indebtedness
plus  stockholders'  equity of the Loan Parties as determined on a  consolidated
basis in accordance with GAAP.

                "CONTINUING  DIRECTORS":  the  directors  of the  Company on the
Closing Date and each other director,  if, in each case,  such other  director's
nomination  for election to the board of directors of the Company is recommended
by at least 66-2/3% of the then Continuing Directors.

                "CONTRACTUAL OBLIGATION": as to any Person, any provision of any
security  issued  by  such  Person  or of any  agreement,  instrument  or  other
undertaking  to  which  such  Person  is a party  or by  which  it or any of its
property is bound.

                "CONTROL": the possession,  directly or indirectly, of the power
to direct or cause the  direction  of the  management  or  policies of a Person,
whether  through the ability to exercise voting power, by contract or otherwise.
"CONTROLLING," "CONTROLS" and "CONTROLLED" have meanings correlative thereto.

                                       6


                "DEBTOR RELIEF LAW":  the Bankruptcy  Code of the United States,
and all  other  liquidation,  conservatorship,  bankruptcy,  assignment  for the
benefit  of  creditors,  moratorium,  rearrangement,  receivership,  insolvency,
reorganization,  or similar  debtor  relief  laws of the United  States or other
applicable jurisdictions from time to time in effect and affecting the rights of
creditors generally.

                "DEFAULT":  any of the events specified in SECTION 8, whether or
not any  requirement  for the giving of notice,  the lapse of time, or both, has
been satisfied.

                "DEFAULTING  LENDER": any Lender that (a) has failed to fund any
portion of the Revolving Loans or participations in L/C Obligations  required to
be funded by it hereunder  within one  Business  Day of the date  required to be
funded by it hereunder,  (b) has otherwise failed to pay over to an Agent or any
other  Lender any other amount  required to be paid by it  hereunder  within one
Business Day of the date when due,  unless the subject of a good faith  dispute,
or (c) has been  deemed  insolvent  or become  the  subject of a  bankruptcy  or
insolvency proceeding.


                "DERIVATIVES COUNTERPARTY": as defined in SECTION 7.6.

                "DETERMINATION DATE": as defined in SECTION 2.14.

                "DISPOSITION":  with respect to any Property,  any sale,  lease,
sale and  leaseback,  assignment,  conveyance,  transfer  or  other  disposition
thereof. The terms "DISPOSE" and "DISPOSED OF" shall have correlative meanings.

                "DOLLARS"  and "$":  dollars  in lawful  currency  of the United
States.

                "ELIGIBLE ASSIGNEE": (a) a Lender; (b) an Affiliate of a Lender;
(c) an Approved  Fund;  and (d) any other Person  (other than a natural  person)
approved by (i) the  Co-Administrative  Agents,  the Issuing  Lenders,  and (ii)
unless an Event of Default has occurred and is  continuing,  the Borrower  (each
such  approval  not to be  unreasonably  withheld  or  delayed);  PROVIDED  that
notwithstanding  the  foregoing,  "Eligible  Assignee"  shall  not  include  the
Borrower or any of the Borrower's Affiliates or Subsidiaries.

                "ENGINEERING REPORTS": as defined in SECTION 6.2(D).

                "ENVIRONMENTAL LAWS": any and all foreign, Federal, state, local
or municipal laws, rules,  orders,  regulations,  statutes,  ordinances,  codes,
decrees, requirements of any Governmental Authority or other Requirements of Law
(including  common  law)  regulating,  relating  to  or  imposing  liability  or
standards of conduct  concerning  protection of human health or the environment,
as now or may at any time hereafter be in effect.

                "ERISA": the Employee Retirement Income Security Act of 1974, as
amended from time to time.

                "EUROCURRENCY RESERVE REQUIREMENTS": for any day as applied to a
Eurodollar  Loan,  the  aggregate  (without  duplication)  of the maximum  rates
(expressed as a decimal fraction) of reserve  requirements in effect on such day
(including  basic,  supplemental,  marginal  and  emergency  reserves  under any
regulations of the Board or other  Governmental  Authority  having  jurisdiction
with  respect  thereto)  dealing  with  reserve   requirements   prescribed  for
eurocurrency  funding  (currently  referred to as "Eurocurrency  Liabilities" in
Regulation D of the Board)  maintained  by a member bank of the Federal  Reserve
System.

                "EURODOLLAR  BASE  RATE":  with  respect to each day during each
Interest Period  pertaining to a Eurodollar  Loan, the rate per annum determined
on the basis of the rate for  deposits  in  Dollars  for a period  equal to such
Interest Period commencing on the first day of such Interest Period appearing on
Page 3750 of the Dow Jones  Markets  screen as of 9:00 A.M.,  London  time,  two
Business Days prior to the beginning of such Interest Period.  In the event that
such rate does not  appear on Page  3750 of the Dow  Jones  Markets  screen  (or
otherwise on such  screen),  the  "EURODOLLAR  BASE RATE" shall be determined by
reference to such other  comparable  publicly  available  service for displaying
eurodollar  rates as may be  selected  by the  Administrative  Agent  or, in the
absence  of  such   availability,   by  reference  to  the  rate  at  which  the
Administrative  Agent is offered Dollar deposits at or about 9:00 A.M., New York
City time,  two Business Days prior to the beginning of such Interest  Period in
the interbank  eurodollar  market where its eurodollar and foreign  currency and
exchange  operations  are then being  conducted for delivery on the first day of
such Interest Period for the number of days comprised therein.

                                       7


                "EURODOLLAR  LOANS":   Revolving  Loans  the  rate  of  interest
applicable to which is based upon the Eurodollar Rate.

                "EURODOLLAR RATE": with respect to each day during each Interest
Period  pertaining  to a  Eurodollar  Loan, a rate per annum  determined  by the
Administrative  Agent  for such day in  accordance  with the  following  formula
(rounded upward to the nearest 1/100th of 1%):

                              EURODOLLAR BASE RATE
                    ---------------------------------------
                    1.00 - Eurocurrency Reserve Requirements

                "EURODOLLAR  TRANCHE":  the  collective  reference to Eurodollar
Loans the then  current  Interest  Periods with respect to all of which begin on
the same date and end on the same later  date  (whether  or not such  Eurodollar
Loans shall originally have been made on the same day).

                "EVALUATION  DATE":  (a) in the case of the  Borrowing  Base, if
applicable,  December 31 of each year, and in the case of the Collateral  Value,
if applicable, June 30 and December 31 of each year, (b) such other dates as the
Majority Lenders,  at their option,  determine  pursuant to a notice executed by
the Majority Lenders that the Borrowing Base, if applicable,  and the Collateral
Value,  if  applicable,  shall be  redetermined  and (c) such other dates as the
Borrower  shall  request;  PROVIDED,  that the Borrower shall not be entitled to
request that a date be an "Evaluation  Date" more than once during any six month
period beginning  January 1 and July 1.  Notwithstanding  anything herein to the
contrary,  the first  Evaluation Date under this Agreement shall be deemed to be
December 31, 2004.

                "EVENT OF  DEFAULT":  any of the events  specified in SECTION 8,
PROVIDED that any  requirement  for the giving of notice,  the lapse of time, or
both, has been satisfied.

                "EXCESS AMOUNT": as defined in SECTION 7.5.

                "EXCHANGE ACT": as defined in SECTION 8(K).

                "EXISTING CREDIT AGREEMENT":  as defined in the preamble to this
Agreement.

                "EXITING LENDERS": any Lender (as defined in the Existing Credit
Agreement) that is not also a Lender under this Agreement.

                "EXISTING LETTERS OF CREDIT":  the Letters of Credit (as defined
in the  Existing  Credit  Agreement)  issued  pursuant  to the  Existing  Credit
Agreement listed on SCHEDULE 1.1C.

                "EXISTING MORTGAGES":  the collective reference to each existing
deed  of  trust,  mortgage,  chattel  mortgage,  security  agreement,  financing
statement and other security documents delivered pursuant to the Existing Credit
Agreement and listed on SCHEDULE 5.1(I).

                                       8


                "FEDERAL  FUNDS  EFFECTIVE  RATE":  for any  day,  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 on the
next  succeeding  Business Day by the Federal  Reserve Bank of New York,  or, if
such rate is not so published for any day that is a Business Day, the average of
the quotations for the day of such transactions  received by the  Administrative
Agent from three federal funds  brokers of recognized  standing  selected by it.
"FUNDING OFFICE":  the office of the  Administrative  Agent specified in SECTION
10.2  or  such  other  office  as may be  specified  from  time  to  time by the
Administrative Agent as its funding office by written notice to the Borrower and
the Lenders.

                "FUND":  any Person  (other than a natural  person)  that is (or
will be)  engaged  in making,  purchasing,  holding or  otherwise  investing  in
commercial loans and similar  extensions of credit in the ordinary course of its
business.

                "GAAP":  generally accepted accounting  principles in the United
States as in effect from time to time except for purposes of SECTION  7.1,  GAAP
shall be determined on the basis of such principles in effect on the date hereof
and  consistent  with those used in the  preparation  of the most recent audited
financial  statements  referred  to in  SECTION  4.1.  In  the  event  that  any
Accounting  Change (as defined  below) shall occur and such change  results in a
change in the method of calculation of financial  covenants,  standards or terms
in this Agreement,  then the Company and the  Co-Administrative  Agents agree to
enter into  negotiations  in order to amend such provisions of this Agreement so
as to equitably reflect such Accounting Changes with the desired result that the
criteria for  evaluating  the Company's  financial  condition  shall be the same
after such Accounting  Changes as if such Accounting  Changes had not been made.
Until such time as such an amendment  shall have been  executed and delivered by
the  Company,  the  Borrower,  the  Co-Administrative  Agents  and the  Majority
Lenders,  all financial  covenants,  standards and terms in this Agreement shall
continue to be  calculated  or construed as if such  Accounting  Changes had not
occurred.  "ACCOUNTING  CHANGES"  refers to  changes  in  accounting  principles
required by the promulgation of any rule,  regulation,  pronouncement or opinion
by the  Financial  Accounting  Standards  Board  of the  American  Institute  of
Certified Public Accountants or, if applicable, the SEC.

                "GOVERNMENTAL AUTHORITY": any nation or government, any state or
other political  subdivision  thereof, any agency,  authority,  instrumentality,
regulatory  body,  court,  central  bank or other entity  exercising  executive,
legislative,  judicial,  taxing,  regulatory or  administrative  functions of or
pertaining  to  government,  any  securities  exchange  and any  self-regulatory
organization (including the National Association of Insurance Commissioners).

                "GROUP MEMBERS":  the collective  reference to the Company,  the
Borrower and their respective Subsidiaries.

                "GUARANTEE  AGREEMENT":  the Guarantee  Agreement to be executed
and delivered by the Company and each Subsidiary Guarantor, substantially in the
form of EXHIBIT A.

                "GUARANTEE  OBLIGATION":  as to any  Person  (the  "GUARANTEEING
PERSON"),  any obligation,  contingent or otherwise,  of the guaranteeing person
guaranteeing  or having the economic effect of  guaranteeing  any  Indebtedness,
leases,  dividends or other obligations (the "PRIMARY OBLIGATIONS") of any other
third  Person  (the  "PRIMARY  OBLIGOR")  in any  manner,  whether  directly  or
indirectly,  including any obligation of the guaranteeing person, whether or not
contingent,  (i) to  purchase  any  such  primary  obligation  or  any  property
constituting  direct or indirect  security  therefor,  (ii) to advance or supply
funds (1) for the purchase or payment of any such primary  obligation  or (2) to
maintain  working  capital or equity capital of the primary obligor or otherwise
to maintain the net worth or solvency of the primary obligor,  (iii) to purchase
property,  securities  or services  primarily  for the  purpose of assuring  the
obligee of any such primary  obligation of the ability of the primary obligor to
make  payment of such  primary  obligation  or (iv)  otherwise to assure or hold
harmless  the  owner of any such  primary  obligation  against  loss in  respect
thereof; PROVIDED, HOWEVER, that the term Guarantee Obligation shall not include
endorsements  of instruments for deposit or collection in the ordinary course of
business.  The amount of any  Guarantee  Obligation of any  guaranteeing  person
shall  be  deemed  to be the  lower of (a) an  amount  equal  to the  stated  or
determinable amount of the primary obligation in respect of which such Guarantee
Obligation is made and (b) the maximum amount for which such guaranteeing person
may be liable  pursuant to the terms of the instrument  embodying such Guarantee
Obligation, unless such primary obligation and the maximum amount for which such
guaranteeing person may be liable are not stated or determinable,  in which case
the amount of such  Guarantee  Obligation  shall be such  guaranteeing  person's
maximum reasonably anticipated liability in respect thereof as determined by the
Company or the Borrower in good faith.

                                       9


                "GUARANTORS":  the  collective  reference to the Company and the
Subsidiary Guarantors.

                "HEDGE   AGREEMENT":   any   (a)   agreement   (including   each
confirmation  entered  into under a master  agreement)  providing  for  options,
swaps,  floors,  caps,  collars,  forward sales or forward  purchases  involving
interest rates, commodities or commodity prices, equities, currencies, bonds, or
indexes based on any of the foregoing,  (b) option,  futures or forward contract
traded on an  exchange,  and (c) other  derivative  agreement  or other  similar
agreement or arrangement.

                "HEDGING SUPPORT CREDIT  FACILITY":  an agreement  governing and
securing  only  Indebtedness  in  respect  of  certain  of the Hedge  Agreements
permitted under SECTION 7.2(G) which agreement, all amendments,  supplements and
modifications  thereto, all documents executed in connection therewith,  and all
Liens securing the Indebtedness thereunder comply substantially with the Hedging
Support Credit Facility Limitations.

                "HEDGING  SUPPORT CREDIT  FACILITY  LIMITATIONS":  the aggregate
exposure and collateral  coverage  terms set forth in the Agreement  between the
Borrower  and  the  counterparty  named  therein  dated  May 28,  2004,  as such
requirements  and  limitations  may be modified or replaced as determined by the
Borrower and a counterparty  from time to time party to a Hedging Support Credit
Facility so long as such modified or replacement  requirements  and  limitations
comply with the requirements and limitations as set forth on EXHIBIT J hereto.

                "INDEBTEDNESS":  of any Person at any date, without duplication,
(a) all  indebtedness of such Person for borrowed money,  (b) all obligations of
such Person for the deferred  purchase price of property or services (other than
current trade payables incurred in the ordinary course of such Person's business
and other  obligations to the extent such  obligations  may be satisfied at such
Person's sole  discretion  by the issuance of common stock of such Person),  (c)
all obligations of such Person  evidenced by notes,  bonds,  debentures or other
similar  instruments,   (d)  all  indebtedness  created  or  arising  under  any
conditional  sale or other title  retention  agreement  with respect to property
acquired by such Person  (even  though the rights and  remedies of the seller or
lender under such agreement in the event of default are limited to  repossession
or sale of such property), (e) all Capital Lease Obligations of such Person, (f)
all obligations of such Person,  contingent or otherwise, as an account party or
applicant under or in respect of acceptances, letters of credit, surety bonds or
similar arrangements, (g) all Guarantee Obligations of such Person in respect of
obligations  of the kind  referred to in clauses (a) through (f) above,  (h) all
obligations  of the kind referred to in clauses (a) through (f) above secured by
(or for which the holder of such obligation has an existing right, contingent or
otherwise,  to be  secured  by) any Lien on  property  (including  accounts  and
contract rights) owned by such Person, whether or not such Person has assumed or
become liable for the payment of such  obligation,  (i) liabilities with respect
to payments  received in  consideration of oil, gas, or other minerals yet to be
acquired  or  produced  at the  time of  payment  (including  obligations  under
"take-or-pay"  contracts to deliver gas in return for payments  already received
and the undischarged balance of any production payment created by such Person or
for the creation of which such Person directly or indirectly  received payment),
and (j) for the purposes of SECTIONS 7.2, 7.3 and 8(e) only, all  obligations of
such Person in respect of Hedge Agreements. The Indebtedness of any Person shall
include the Indebtedness of any other entity (including any partnership in which
such Person is a general  partner) to the extent such Person is liable  therefor
as a result of such Person's  ownership  interest in or other  relationship with
such  entity,  except to the  extent  the terms of such  Indebtedness  expressly
provide that such Person is not liable therefor.

                                       10


                "INDEMNITEE": as defined in SECTION 10.5(B).

                "INDENTURES":  to the extent  that the notes  issued  thereunder
remain outstanding,  each Indenture governing the Index Debt issued prior to the
Closing  Date or issued  from time to time after the Closing  Date as  permitted
under SECTION 7.2.

                "INDEPENDENT REPORT": as defined in SECTION 6.2(D).

                "INDEX  DEBT":  the  Company's  long-term,   unsecured,  senior,
non-credit enhanced debt.

                "INFORMATION": as defined in SECTION 10.15.

                "INITIAL ENGINEERING  REPORT": the following  engineering report
concerning oil and gas properties of the Company and
its  Subsidiaries:  Report dated  September  30, 2004  prepared by the Company's
employee engineers.

                "INSOLVENCY":  with  respect  to  any  Multiemployer  Plan,  the
condition  that such Plan is  insolvent  within the  meaning of Section  4245 of
ERISA.

                "INSOLVENT": pertaining to a condition of Insolvency.

                "INTELLECTUAL PROPERTY": the collective reference to all rights,
priorities and privileges  relating to  intellectual  property,  whether arising
under  United  States,  multinational  or foreign laws or  otherwise,  including
copyrights,  copyright licenses, patents, patent licenses, trademarks, trademark
licenses, technology, know-how and processes, and all rights to sue at law or in
equity for any infringement or other impairment thereof,  including the right to
receive all proceeds and damages therefrom.

                "INTEREST  PAYMENT DATE": (a) as to any Base Rate Loan, the last
day of each March,  June,  September  and December to occur while such Base Rate
Loan is  outstanding  and the final maturity date of such Base Rate Loan, (b) as
to any  Eurodollar  Loan having an Interest  Period of three months or less, the
last day of such  Interest  Period,  (c) as to any  Eurodollar  Loan  having  an
Interest  Period longer than three months,  each day that is three months,  or a
whole multiple thereof, after the first day of such Interest Period and the last
day of such Interest  Period and (d) as to any Eurodollar  Loan, the date of any
repayment or prepayment made in respect thereof.

                "INTEREST PERIOD": as to any Eurodollar Loan, (a) initially, the
period  commencing on the borrowing or conversion date, as the case may be, with
respect  to such  Eurodollar  Loan and  ending  one,  two,  three or six  months
thereafter,  as selected by the Borrower in its notice of borrowing or notice of
conversion,  as the case may be, given with respect thereto; and (b) thereafter,
each period  commencing on the last day of the next  preceding  Interest  Period
applicable  to such  Eurodollar  Loan and ending one,  two,  three or six months
thereafter,   as  selected  by  the  Borrower  by  irrevocable   notice  to  the
Administrative  Agent no later than 9:00 A.M.,  Los  Angeles,  California  time,
three  Business Days prior to the last day of the then current  Interest  Period
with respect thereto; PROVIDED that, all of the foregoing provisions relating to
Interest Periods are subject to the following:

                (i) if any Interest  Period would otherwise end on a day that is
     not a Business  Day,  such  Interest  Period  shall be extended to the next
     succeeding  Business  Day unless the result of such  extension  would be to
     carry such Interest Period into another  calendar month in which event such
     Interest Period shall end on the immediately preceding Business Day;

                (ii) the Borrower  may not select an Interest  Period that would
     extend beyond the Revolving Termination Date;

                (iii) any Interest  Period that begins on the last  Business Day
     of a  calendar  month  (or  on a day  for  which  there  is no  numerically
     corresponding day in the calendar month at the end of such Interest Period)
     shall end on the last Business Day of a calendar month; and

                (iv) the  Borrower  shall select  Interest  Periods so as not to
     require a payment or prepayment of any  Eurodollar  Loan during an Interest
     Period for such Eurodollar Loan.

                "INTERNAL  CONTROL EVENT": a material weakness in, or fraud that
involves  management  or other  employees  who have a  significant  role in, the
Borrower's internal controls over financial reporting, in each case as described
in the Securities Laws.

                                       11


                "INVESTMENTS": as defined in SECTION 7.7.

                "ISP": with respect to any Letter of Credit,  the "International
Standby Practices 1998" published by the Institute of International  Banking Law
&  Practice  (or such later  version  thereof as may be in effect at the time of
issuance).

                "ISSUER  DOCUMENTS":  with respect to any Letter of Credit,  the
L/C Application,  and any other document,  agreement and instrument entered into
by the  Issuing  Lender and the  Borrower  (or any  Subsidiary)  or in favor the
Issuing Lender and relating to any such Letter of Credit.

                "ISSUING  LENDER":  each of Union Bank of  California,  N.A. and
Bank of America,  N.A.,  in its capacity as issuer of any Letter of Credit.  The
Co-Administrative  Agents may, with the consent of the Borrower and the relevant
Lender,  appoint such Lender  hereunder  as an Issuing  Lender in place of or in
addition  to Union Bank of  California,  N.A.  and Bank of America,  N.A,  which
appointment  may be subject to an L/C Sublimit in respect of such Issuing Lender
specified by Co-Administrative Agents and such Lender.

                "L/C  ADVANCE":  with  respect  to each  Lender,  such  Lender's
funding  of its  participation  in any L/C  Borrowing  in  accordance  with  its
Revolving Percentage.

                "L/C APPLICATION": an application and agreement for the issuance
or  amendment  of a Letter of Credit in the form from time to time in use by the
Issuing Lender.

                "L/C BORROWING": an extension of credit resulting from a drawing
under any Letter of Credit which has not been  reimbursed  on the date when made
or refinanced as a Revolving Loan.

                "L/C COMMITMENT": $500,000,000.

                "L/C CREDIT  EXTENSION":  with  respect to any Letter of Credit,
the issuance thereof or extension of the expiry date thereof, or the increase of
the amount thereof.

                "L/C EXPIRATION  DATE":  the day that is seven days prior to the
Revolving  Termination  Date then in effect  (or,  if such day is not a Business
Day, the next preceding Business Day).

                "L/C  FEE  PAYMENT  DATE":  the last  day of each  March,  June,
September and December and the last day of the Revolving Commitment Period.

                "L/C  OBLIGATIONS":  as  at  any  date  of  determination,   the
aggregate amount  available to be drawn under all outstanding  Letters of Credit
PLUS the aggregate of all  Unreimbursed  Amounts,  including all L/C Borrowings.
For purposes of computing  the amount  available to be drawn under any Letter of
Credit,  the amount of such Letter of Credit shall be  determined  in accordance
with  SECTION  1.3.  For all  purposes  of  this  Agreement,  if on any  date of
determination  a Letter of Credit  has  expired  by its terms but any amount may
still be drawn  thereunder  by reason of the  operation of Rule 3.14 of the ISP,
such  Letter of Credit  shall be deemed  to be  "outstanding"  in the  amount so
remaining available to be drawn.

                "L/C  SUBLIMIT":  with respect to each of Bank of America,  N.A.
and Union Bank of California, N.A., the lesser of (i) $250,000,000,  or (ii) 50%
of the L/C Commitment,  and with respect to any other Issuing Lender, the amount
and/or  percentage  of the L/C  Commitment  specified  by the  Co-Administrative
Agents and such Issuing Lender in connection  with its appointment as an Issuing
Lender.

                "LENDER  AFFILIATE":  (a) any  Affiliate of any Lender,  (b) any
Person  that is  administered  or  managed  by any Lender and that is engaged in
making,  purchasing,  holding or  otherwise  investing in  commercial  loans and
similar extensions of credit in the ordinary course of its business and (c) with
respect  to any Lender  which is a fund that  invests  in  commercial  loans and
similar  extensions of credit,  any other fund that invests in commercial  loans
and  similar  extensions  of  credit  and is  managed  or  advised  by the  same
investment  advisor  as  such  Lender  or by an  Affiliate  of  such  Lender  or
investment advisor.

                "LENDER HEDGE AGREEMENT":  a Hedge Agreement between the Company
or the  Borrower  and a  Lender  or an  affiliate  of a Lender  (including  each
confirmation or modification in respect of such Hedge Agreement).

                                       12

                "LENDERS": as defined in the preamble hereto.

                "LETTERS  OF  CREDIT":  the  Existing  Letters of Credit and any
letter of credit issued hereunder including amendments thereto.

                "LIEN": any mortgage, pledge, hypothecation, assignment, deposit
arrangement,  encumbrance,  lien (statutory or other),  charge or other security
interest or any preference, priority or other security agreement or preferential
arrangement of any kind or nature whatsoever  (including any conditional sale or
other title retention  agreement and any capital lease having  substantially the
same economic effect as any of the foregoing).

                "LOAN DOCUMENTS":  this Agreement,  the Security Documents,  the
Guarantee Agreement and the Notes.

                "LOAN  PARTIES":  each  Group  Member  that is a party to a Loan
Document.

                "MAJORITY LENDERS": at any time, the holders of more than 50% of
the Total  Revolving Commitments  then in  effect  or, if the
Revolving  Commitments have been terminated,  the Total Revolving  Extensions of
Credit then outstanding.

                "MATERIAL ADVERSE EFFECT":  a material adverse effect on (a) the
business, property,  operations,  condition (financial or otherwise), results of
operations or prospects of the Company and its Subsidiaries  taken as a whole or
(b) the validity or  enforceability  of this  Agreement or any of the other Loan
Documents  or the rights or remedies of the Agents or the Lenders  hereunder  or
thereunder.

                "MATERIALS OF ENVIRONMENTAL  CONCERN": any gasoline or petroleum
(including  crude oil or any  fraction  thereof)  or  petroleum  products or any
hazardous or toxic substances, materials or wastes, defined or regulated as such
in or under any Environmental Law, including asbestos, polychlorinated biphenyls
and urea-formaldehyde insulation.

                "MOODY'S":  Moody's  Investors  Service,  Inc. and any successor
thereto.

                "MORTGAGED PROPERTIES":  the properties listed on SCHEDULE 1.1B,
as to which the  Administrative  Agent for the benefit of the  Lenders  shall be
granted a Lien pursuant to the  Mortgages and such other  properties as to which
amendments to the relevant Existing  Mortgages as contemplated by SECTION 5.1(I)
have been  executed,  but excluding  properties  as to which  releases have been
executed pursuant to SECTION 10.14.

                "MORTGAGES":  each of the  mortgages  and deeds of trust made by
any Loan Party in favor of, or for the benefit of, the Administrative  Agent for
the benefit of the  Lenders,  substantially  in the form of EXHIBIT D (with such
changes thereto as shall be advisable under the law of the jurisdiction in which
such  mortgage  or  deed  of  trust  is  to  be  recorded),  including,  without
limitation,  the Existing  Mortgages  and  amendments  to the relevant  Existing
Mortgages as contemplated by SECTION 5.1(I).

                "MULTIEMPLOYER  PLAN":  a Plan that is a  multiemployer  plan as
defined in Section 4001(a)(3) of ERISA.

                "NET CASH  PROCEEDS":  in connection with any  Disposition,  the
proceeds  thereof in the form of cash and Cash  Equivalents  (including any such
proceeds received by way of deferred payment of principal  pursuant to a note or
installment  receivable  or  purchase  price  adjustment  receivable  or by  the
Disposition of any non-cash  consideration  received in connection  therewith or
otherwise,  but only as and when received), net of attorneys' fees, accountants'
fees,  investment  banking fees, amounts required to be applied to the repayment
of  Indebtedness  secured by a Lien expressly  permitted  hereunder on any asset
that is the  subject of such  Disposition  (other  than any Lien  pursuant  to a
Security  Document) and other customary fees and expenses  actually  incurred in
connection therewith and net of taxes paid or reasonably estimated to be payable
as a result  thereof  (after  taking into account any  available  tax credits or
deductions and any tax sharing arrangements).

                "NON-EXCLUDED TAXES": as defined in SECTION 3.10(A).

                "NON-U.S. LENDER": as defined in SECTION 3.10(D).

                "NOTES":   the  collective  reference  to  any  promissory  note
evidencing Revolving Loans.

                "OBLIGATIONS":   the  unpaid   principal   of  and  interest  on
(including  interest and fees accruing after the maturity of the Revolving Loans
and L/C Obligations and interest and fees accruing after the commencement of any
proceeding under any Debtor Relief Law, relating to the Borrower, whether or not
a claim for post-filing or post-petition interest is allowed in such proceeding)
the Revolving  Loans, L/C  Obligations,  Pari Passu Hedging  Obligations and all
other  obligations and liabilities of the Borrower and the other Loan Parties to
any Agent or to any Lender, whether direct or indirect,  absolute or contingent,

                      13


due or to become due, or now  existing or  hereafter  incurred,  which may arise
under, out of, or in connection  with, this Agreement,  any other Loan Document,
the  Letters  of  Credit  or any  other  document  made,  delivered  or given in
connection  herewith or therewith,  whether on account of  principal,  interest,
reimbursement  obligations,  fees,  indemnities,  costs, expenses (including all
fees,  charges and  disbursements  of counsel to any Agent or to any Lender that
are  required to be paid by the  Borrower  and the other Loan  Parties  pursuant
hereto) or otherwise. It is expressly agreed that Pari Passu Hedging Obligations
shall be limited to the maximum aggregate amount and to the allocations  thereof
as set forth in SECTION 3.8(F),  but that Pari Passu Hedging  Obligations  shall
not be treated as Obligations for purposes of the provisions for acceleration in
SECTION 8 and for adjustments and set-off in SECTION 10.7.

                "OTHER   PROVED   RESERVES":   the   portion  of  the   reserves
attributable  to the Mortgaged  Properties  which are  categorized as Proved but
which are not then  categorized as Producing,  and,  without  limitation on such
other  adjustments  or  assumptions  which may be used by the  Co-Administrative
Agents or any Lender in the  determination  of Collateral  Value,  such reserves
shall be reduced to the risk adjusted values determined by the Co-Administrative
Agents at the time of such determination, which, as of the Closing Date, are 50%
of Proved Undeveloped reserves and 75% of Proved Developed Behind Pipe reserves,
Proved  Developed  Shut-in  reserves  and other Proved  Developed  Non-Producing
reserves.

                "OTHER   TAXES":   any  and  all  present  or  future  stamp  or
documentary  taxes or any other  excise or  property  taxes,  charges or similar
levies arising from any payment made  hereunder or from the execution,  delivery
or  enforcement  of, or otherwise  with respect to, this  Agreement or any other
Loan Document.

                "PARI  PASSU  HEDGING  OBLIGATION  ALLOCATION":  as  defined  in
SECTION 3.8(F).

                "PARI  PASSU  HEDGING  OBLIGATION  NOTICE":  a notice  delivered
pursuant to SECTION 3.8(F), substantially in the form of EXHIBIT I.

                "PARI PASSU HEDGING OBLIGATIONS":  obligations arising from time
to time under any Lender  Hedge  Agreement  if an  effective  Lender  Pari Passu
Hedging  Obligation  Allocation  has been made in respect of such Lender and its
Affiliate,  limited to the amount of such Lender's Pari Passu Hedging Obligation
Allocation.

                "PARTICIPANT": as defined in SECTION 10.6(D).

                "PBGC":  the Pension Benefit  Guaranty  Corporation  established
pursuant to Subtitle A of Title IV of ERISA (or any successor).

                "PERMITTED  PREFERRED  STOCK":  Preferred  Stock of the  Company
either (a)  outstanding  on the Closing Date or (b) issued or modified after the
Closing Date as permitted by SECTION 7.17.

                "PERMITTED  SECURITIZATION":  any transfer by the  Company,  the
Borrower,  or  any  Subsidiary  of  accounts  receivable  or  interests  therein
(collectively,  "Receivables") and all collateral securing such Receivables, all
contracts  and  contract  rights that are  guarantees  or other  obligations  in
respect of such Receivables, all lockbox accounts, collection accounts and other
assets that are  customarily  granted in  connection  with asset  securitization
transactions  involving  Receivables  and all  proceeds of any of the  foregoing
(collectively, the "Related Security") (i) to a Securitization Subsidiary, which
transfer  is  funded  in  whole  or in  part,  directly  or  indirectly,  by the
incurrence  or  issuance  by the  transferee  or  any  successor  transferee  of
indebtedness  or other  securities  that are to receive  payments  from, or that
represent  interests in, the cash flow derived from such Receivables and Related
Security,  or (ii) directly to one or more investors or other purchasers  (other
than the  Company,  the  Borrower or a  Subsidiary),  in any case  involving  an
aggregate  principal  amount  at  any  time  not  to  exceed  $150,000,000.  The
"principal amount" of any Permitted  Securitization  shall be deemed at any time
to be (x) in the case of a transaction  described in clause (i) of the preceding
sentence,  the  aggregate  principal  or stated  amount of the  indebtedness  or
securities  referred  to in such  clause  incurred  or issued for the purpose of
funding the Securitization  Subsidiary's  acquisition of Receivables and Related
Security (exclusive of any subordinated notes that the Securitization Subsidiary
may issue to the  Company,  the Borrower or any other  Subsidiary)  or, if there
shall be no such  principal  or stated  amount,  the  uncollected  amount of the
Receivables  transferred  pursuant to such Permitted  Securitization  net of any
such  Receivables  that have been written off as  uncollectible,  and (y) in the
case of a transaction  described in clause (ii) of the preceding  sentence,  the
lesser of the aggregate  outstanding principal amount of the subject Receivables
or the  indebtedness  secured by Liens on the  subject  Receivables  and Related
Security, as applicable.  The term "Permitted Securitization" shall also include
refinancings of the foregoing within such limitation on the aggregate  principal
amount of such Permitted Securitization.

                                       14

                "PERSON":  an  individual,  partnership,   corporation,  limited
liability company,  business trust, joint stock company,  trust,  unincorporated
association,  joint venture,  Governmental Authority or other entity of whatever
nature.

                "PLAN":  at a particular time, any employee benefit plan that is
covered by ERISA and in respect of which the  Borrower or a Commonly  Controlled
Entity is (or, if such plan were  terminated  at such time,  would under Section
4069 of ERISA be deemed to be) an  "employer"  as  defined  in  Section  3(5) of
ERISA.

                "PLATFORM": as defined in SECTION 6.2.

                "PREFERRED  STOCK":  as  applied  to the  Capital  Stock  of any
Person, means Capital Stock of any class or classes (however designated),  which
is  preferred  as to  the  payment  of  dividends,  or  upon  any  voluntary  or
involuntary  liquidation or  dissolution of such Person,  over shares of Capital
Stock of any other class of such Person.

                "PRO FORMA  INCURRENCE  TESTS":  on the date of the  transaction
giving  rise to the  need to  calculate  the Pro  Forma  Incurrence  Tests  (the
"Transaction  Date"),  on  a  pro  forma  basis  after  giving  effect  to  such
transaction:  (a) the  ratio  of  Consolidated  EBITDA  for the  period  of four
consecutive  fiscal  quarters of the Company  most  recently  ended prior to the
Transaction Date (the "Reference  Period") to Consolidated Fixed Charges for the
Reference  Period is not less than 2.5 to 1.0 and (b) the ratio of  Consolidated
Indebtedness to  Consolidated  Total  Capitalization  is not greater than .65 to
1.0.  In  calculating  Consolidated  Fixed  Charges on a pro forma basis (i) the
incurrence of any  Indebtedness  or issuance of any  Preferred  Stock during the
Reference  Period or subsequent  to the Reference  Period and on or prior to the
Transaction  Date  shall be assumed  to have  occurred  on the first day of such
Reference  Period,  (ii) all dividends on Preferred Stock outstanding or assumed
to be  outstanding  during the  Reference  Period are assumed to have been paid,
(iii) any Indebtedness or Preferred Stock that had been  outstanding  during the
Reference  Period that has been repaid,  repurchased  or redeemed on or prior to
the  Transaction  Date  shall be  assumed to have been  repaid,  repurchased  or
redeemed as of the first day of such  Reference  Period,  (iv) the  Consolidated
Interest  Expense  attributable to interest on any  Indebtedness or dividends on
any  Preferred  Stock bearing a floating  interest (or  dividend)  rate shall be
computed on a pro forma basis as if the rate in effect on the  Transaction  Date
were the average rate in effect  during the entire  Reference  Period and (v) to
the extent the net proceeds from the incurrence or issuance of  Indebtedness  or
Preferred Stock are used to retire Indebtedness, the application of the proceeds
therefrom  shall be assumed to have  occurred on the first day of the  Reference
Period.

                "PROJECTIONS": as defined in SECTION 6.2(C).

                "PROPERTIES": as defined in SECTION 4.17(A).

                "PROPERTY":  any right or interest in or to property of any kind
whatsoever,  whether real, personal or mixed and whether tangible or intangible,
including, without limitation, Capital Stock.

                "PROVED DEVELOPED PROPERTIES": as defined in the Indenture dated
April 6, 2001, governing the Company's 8.125% notes.

                "PROVED",   "PRODUCING",   "PROVED   UNDEVELOPED"   and  "PROVED
DEVELOPED NON PRODUCING":  will have the meaning given under the Definitions for
Oil and Gas Reserves  promulgated by the Society of Petroleum  Engineers (or any
generally  recognized  successors),  and the  references  to  "BEHIND  PIPE" and
"SHUT-IN" will have the meaning used in such Definitions.

                "PV": as of any date of  determination,  the  calculation of the
present value (utilizing the average of the discount rates customarily  utilized
by the Co-Administrative Agents for collateral valuation purposes, which, on the
Closing Date, is 9%) of the projected  future net revenues  attributable  to SPE
Basis  Projected  Production as such  production is projected in the most recent
report  delivered  pursuant  to SECTION  6.2(D),  utilizing  the  average of the
applicable price assumptions used by the Co-Administrative  Agents in evaluating
their oil and gas loans generally as determined by the Co-Administrative Agents,
adjusted to give effect to applicable commodity prices (or caps or floors) under
the Loan Parties' Hedge Agreements.

                                       15


                "RATING AGENCIES":  the collective reference to S&P and Moody's.

                "RECEIVABLES":  as  defined  in  the  definition  of  "Permitted
Securitization."

                "REFERENCE  RATE":  as defined in the definition of "Base Rate."

                "REGISTER": as defined in SECTION 10.6(C).

                "REGISTERED  PUBLIC  ACCOUNTING  FIRM":  will  have the  meaning
specified in the Securities Laws and shall be independent of the Company and the
Borrower as prescribed by the Securities Laws.

                "REGULATION U": Regulation U of the Board as in effect from time
to time.

                "RELATED  PARTIES":  with respect to any Person,  such  Person's
Affiliates and the partners, directors, officers, employees, agents and advisors
of such Person and of such Person's Affiliates.

                "RELATED  SECURITY":  as defined in the definition of "Permitted
Securitization."

                "REORGANIZATION":  with respect to any  Multiemployer  Plan, the
condition that such plan is in reorganization within the meaning of Section 4241
of ERISA.

                "REPORTABLE  EVENT":  any of the  events  set  forth in  Section
4043(b)  of ERISA,  other  than  those  events as to which the thirty day notice
period is waived under  subsections  .27, .28, .29, .30, .31, .32, .34 or .35 of
PBGC Reg. ss. 4043.

                "REQUIRED LENDERS": at any time, the holders of more than 75% of
the Total Revolving  Commitments then in effect or, if the Revolving Commitments
have been terminated, the Total Revolving Extensions of Credit then outstanding.

                "REQUIREMENT  OF LAW":  as to any  Person,  the  Certificate  of
Incorporation and By-Laws or other organizational or governing documents of such
Person,  and  any  law,  treaty,  rule  or  regulation  or  determination  of an
arbitrator or a court or other Governmental  Authority,  in each case applicable
to or binding upon such Person or any of its property or to which such Person or
any of its property is subject.

                "RESPONSIBLE OFFICER":  the chief executive officer,  president,
chief financial officer or treasurer of the Company or the Borrower,  but in any
event,  with  respect  to  financial  matters,  the chief  financial  officer or
treasurer of the Company or the Borrower.

                                       16


                "RESTRICTED PAYMENTS": as defined in SECTION 7.6.

                "REVOLVING COMMITMENT": as to any Lender, the obligation of such
Lender,  if any, to make Revolving Loans and participate in Letters of Credit in
an  aggregate  principal  and/or  face amount not to exceed the amount set forth
under the heading "Revolving Commitment" opposite such Lender's name on SCHEDULE
1.1A or in the Assignment and Acceptance  pursuant to which such Lender became a
party hereto, as the same may be changed from time to time pursuant to the terms
hereof. The amount of the Total Revolving  Commitments as of the Closing Date is
$1,250,000,000.

                "REVOLVING COMMITMENT PERIOD": the period from and including the
Closing Date to the Revolving Termination Date.

                "REVOLVING  EXTENSIONS OF CREDIT": as to any Lender at any time,
an  amount  equal  to the  sum of (a)  the  aggregate  principal  amount  of all
Revolving  Loans held by such  Lender  then  outstanding  and (b) such  Lender's
Revolving Percentage of the L/C Obligations then outstanding.

                "REVOLVING LOANS": as defined in SECTION 2.1(A).

                "REVOLVING  PERCENTAGE":  as to  any  Lender  at any  time,  the
percentage  which such Lender's  Revolving  Commitment  then  constitutes of the
Total  Revolving  Commitments  (or, at any time after the Revolving  Commitments
shall have expired or terminated,  the percentage which the aggregate  principal
amount  of  such  Lender's  Revolving  Extensions  of  Credit  then  outstanding
constitutes  of the aggregate  principal  amount of the Revolving  Extensions of
Credit then outstanding).

                "REVOLVING  TERMINATION DATE": January 29, 2010.

                "S&P":  Standard&  Poor's  Ratings  Services  and any  successor
thereto.

                "SARBANES-OXLEY": the Sarbanes-Oxley Act of 2002.

                "SEC":  the  Securities and Exchange  Commission,  any successor
thereto and any analogous Governmental Authority.

                "SECURITIES  LAWS":  the  Securities Act of 1933, the Securities
Exchange Act of 1934,  Sarbanes-Oxley and the applicable accounting and auditing
principles, rules, standards and practices promulgated, approved or incorporated
by the SEC or the Public  Company  Accounting  Oversight  Board,  as each of the
foregoing may be amended and in effect on any applicable date hereunder.

                "SECURITIZATION  SUBSIDIARY":  a Subsidiary  established for the
limited purpose of facilitating a Permitted Securitization and whose only assets
are  Receivables  and  Related   Securities  to  be  subject  to  the  Permitted
Securitization.  In no event may the  Securitization  Subsidiary  guarantee  any
indebtedness  of the  Company,  the  Borrower  or  any  other  Subsidiary  or be
obligated to pledge security therefor.

                "SECURITY DOCUMENTS":  the collective reference to the Mortgages
and all other security documents hereafter delivered to the Administrative Agent
granting a Lien on any  property  of any Person to secure  the  obligations  and
liabilities of any Loan Party under any Loan Document.

                "SENIOR DEBT LIMIT": the maximum amount of Indebtedness that the
Company  and its  Subsidiaries  may incur and  secure  pursuant  to the terms of
clause (i) of the definition of "Permitted  Indebtedness" and clause (ii) of the
definition  of  "Permitted  Liens"  under the  Indentures,  minus the  amount of
Indebtedness  (other than Indebtedness under this Agreement) that the Company or
any of its  Subsidiaries  have incurred  and/or  secured by Liens as of such day
that counts  against the  restrictions  on the  maximum  amount of  Indebtedness
referred to in such  clause  (i).  For  purposes  of this  definition,  the term
"Indebtedness" shall have the meaning given in the Indentures.

                "SFAS":  Statement of Financial  Accounting  Standard No. 133 or
No. 143 as promulgated by the Financial Accounting Standards Board.

                                       17


                "SINGLE  EMPLOYER PLAN": any Plan that is covered by Title IV of
ERISA, but that is not a Multiemployer Plan.

                "SOLVENT":  when used with respect to any Person, means that, as
of any date of  determination,  (a) the  amount of the  "present  fair  saleable
value" of the assets of such Person will, as of such date,  exceed the amount of
all "liabilities of such Person,  contingent or otherwise",  as of such date, as
such quoted terms are determined in accordance with applicable federal and state
laws governing determinations of the insolvency of debtors, (b) the present fair
saleable  value of the assets of such Person will,  as of such date,  be greater
than the amount that will be required to pay the liability of such Person on its
debts as such debts become absolute and matured,  (c) such Person will not have,
as of such date, an  unreasonably  small amount of capital with which to conduct
its business,  and (d) such Person will be able to pay its debts as they mature.
For purposes of this  definition,  (i) "debt" means liability on a "claim",  and
(ii)  "claim"  means any (x) right to  payment,  whether  or not such a right is
reduced to  judgment,  liquidated,  unliquidated,  fixed,  contingent,  matured,
unmatured,  disputed,  undisputed, legal, equitable, secured or unsecured or (y)
right to an equitable remedy for breach of performance if such breach gives rise
to a right to  payment,  whether  or not such  right to an  equitable  remedy is
reduced  to  judgment,  fixed,  contingent,   matured  or  unmatured,  disputed,
undisputed, secured or unsecured.

                "SPE BASIS PROJECTED PRODUCTION":  at any time of determination,
the  projected  production  of  oil or  gas  (measured  by  volume  unit  or BTU
equivalent,  not sales price) from  properties and interests  owned by any Group
Member  which are  located  in or  offshore  of the  United  States  and  Canada
attributable  to the portion of the reserves  categorized  as "Proved",  as such
production is projected in the most recent report delivered  pursuant to SECTION
6.2(D),  after deducting  projected  production from any properties or interests
sold or under  contract for sale that had been included in such report and after
adding  projected  production from any properties or interests that had not been
reflected in such report but that are  reflected  in a separate or  supplemental
report which is satisfactory to the Co-Administrative Agents.

                "SPECIFIED  CHANGE OF  CONTROL":  a "Change of Control"  (or any
other  defined  term  having a similar  purpose)  as defined  in any  instrument
governing any Indebtedness of the Company or any of its Subsidiaries  including,
without limitation, the Indentures.

                "SUBSIDIARY":  as to any  Person,  a  corporation,  partnership,
limited  liability  company  or other  entity of which  shares of stock or other
ownership interests having ordinary voting power (other than stock or such other
ownership  interests  having  such  power only by reason of the  happening  of a
contingency)  to elect a majority of the board of directors or other managers of
such  corporation,  partnership  or other  entity are at the time owned,  or the
management of which is otherwise controlled,  directly or indirectly through one
or more intermediaries, or both, by such Person. Unless otherwise qualified, all
references to a "Subsidiary" or to  "Subsidiaries" in this Agreement shall refer
to a Subsidiary or Subsidiaries of the Company.

                "SUBSIDIARY  GUARANTOR":  each  Subsidiary of the Company (other
than the Borrower and any Subsidiary that is an "Unrestricted  Subsidiary" under
the Indentures).

                "SYNTHETIC PURCHASE AGREEMENT":  any agreement pursuant to which
any  Group  Member  is or may  become  obligated  to  make  (a) any  payment  in
connection with the purchase by any third party from a Person other than a Group
Member of any Capital  Stock of any Group  Member or (b) any payment  (except as
otherwise  expressly permitted by SECTION 7.6) the amount of which is determined
by  reference  to the  price or value at any time of any such  Capital  Stock or
Indebtedness;  PROVIDED,  that no phantom  stock or similar plan  providing  for
payments only to current or former directors, officers or employees of any Group
Member (or to their heirs or estates) shall be deemed to be a Synthetic Purchase
Agreement.

                                       18


                "TOTAL REVOLVING COMMITMENTS": at any time, the aggregate amount
of the Revolving Commitments then in effect.

                "TOTAL  REVOLVING  EXTENSIONS  OF  CREDIT":  at  any  time,  the
aggregate  amount  of  the  Revolving   Extensions  of  Credit  of  the  Lenders
outstanding at such time.

                "TRANSFEREE": any Participant.

                "TYPE": as to any Revolving Loan, its nature as a Base Rate Loan
or a Eurodollar Loan.

                "UNITED STATES": the United States of America.

                "UNREIMBURSED AMOUNT": as defined in SECTION 2.7(A).

                "UNRESTRICTED SUBSIDIARY INVESTMENT": (a) in connection with the
designation  of  a  Subsidiary  Guarantor  or  any  newly  created  or  acquired
Subsidiary as an "Unrestricted Subsidiary" under the Indentures, an amount equal
to the greater of (x) the book value (determined in accordance with GAAP) at the
date of such  designation of the aggregate  Investments  made by the Company and
its other Subsidiary Guarantors in such Subsidiary Guarantor or newly created or
acquired  Subsidiary  and (y) the fair market value of such  Investments in such
Subsidiary Guarantor or newly created or acquired Subsidiary at the time of such
designation  and (b) in  connection  with the  designation  of an  "Unrestricted
Subsidiary" as a "Restricted  Subsidiary"  under the Indentures and a Subsidiary
Guarantor  hereunder,  an  amount  equal to the  lesser  of (x) the  book  value
(determined  in  accordance  with GAAP) at the date of such  designation  of the
aggregate Investments made by the Company and its other Subsidiary Guarantors in
such  Subsidiary  and (y) the  fair  market  value of such  Investments  in such
Subsidiary at the time of such designation.

                "UNUSED COMMITMENTS":  at any time, the excess of (i) the lesser
of the  Borrowing  Base,  if  applicable,  at such time and the Total  Revolving
Commitments at such time over (ii) the Total  Revolving  Extensions of Credit at
such time.

                                       19



          1.2.  OTHER DEFINITIONAL PROVISIONS

                (a) Unless  otherwise  specified  therein,  all terms defined in
this  Agreement  shall  have the  defined  meanings  when used in the other Loan
Documents or any certificate or other document made or delivered pursuant hereto
or thereto.

                (b) As used  herein  and in the other  Loan  Documents,  and any
certificate or other document made or delivered pursuant hereto or thereto,  (i)
accounting  terms  relating  to any Group  Member not defined in SECTION 1.1 and
accounting terms partly defined in SECTION 1.1, to the extent not defined, shall
have the respective meanings given to them under GAAP, (ii) the words "include",
"includes" and "including" shall be deemed to be followed by the phrase "without
limitation",  (iii) the word "incur"  shall be construed to mean incur,  create,
issue,  assume,  become  liable in  respect of or suffer to exist (and the words
"incurred" and "incurrence" shall have correlative meanings), and (iv) the words
"asset" and  "property"  shall be  construed to have the same meaning and effect
and to refer to any and all  tangible  and  intangible  assets  and  properties,
including  cash,  Capital  Stock,  securities,   revenues,  accounts,  leasehold
interests  and  contract  rights,  and (v)  references  to  agreements  or other
Contractual Obligations shall, unless otherwise specified, be deemed to refer to
such agreements or Contractual Obligations as amended, supplemented, restated or
otherwise  modified  from time to time.

                (c) 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  Section,
Schedule  and  Exhibit   references  are  to  this  Agreement  unless  otherwise
specified.

                (d) The meanings  given to terms defined herein shall be equally
applicable to both the singular and plural forms of such terms.

                (e) All references herein to consolidated  financial  statements
of the Company and its  Subsidiaries or to the  determination  of any amount for
the  Company  and  its  Subsidiaries  on a  consolidated  basis  or any  similar
reference  shall,  in each case,  be deemed to include  each  variable  interest
entity  that  the  Company  is   required  to   consolidate   pursuant  to  FASB
Interpretation  No.  46  -  Consolidation  of  Variable  Interest  Entities:  an
interpretation  of ARB No. 51 (January 2003) as if such variable interest entity
were a Subsidiary as defined herein.

          1.3.  LETTER OF CREDIT AMOUNTS. Unless otherwise specified herein, the
amount of a Letter of Credit at any time shall be deemed to be the stated amount
of such Letter of Credit in effect at such time;  PROVIDED,  HOWEVER,  that with
respect  to any Letter of Credit  that,  by its terms or the terms of any Issuer
Document  related thereto,  provides for one or more automatic  increases in the
stated amount thereof, the amount of such Letter of Credit shall be deemed to be
the maximum  stated  amount of such Letter of Credit after giving  effect to all
such  increases,  whether or not such maximum stated amount is in effect at such
time; AND,  PROVIDED  FURTHER that with respect to any Letter of Credit that, by
its terms or the terms of any Issuer Document related thereto,  provides for one
or more  automatic  decreases in the stated amount  thereof,  the amount of such
Letter of Credit shall be deemed to be the maximum  stated amount of such Letter
of  Credit  after  giving  effect  to all  such  decreases,  as of the  date  of
determination.


              SECTION 2. AMOUNT AND TERMS OF REVOLVING COMMITMENTS

          2.1.  REVOLVING COMMITMENTS

                (a)  Subject to the terms and  conditions  hereof,  each  Lender
severally  agrees to make  revolving  credit  loans  ("REVOLVING  LOANS") to the
Borrower  from  time  to time  during  the  Revolving  Commitment  Period  in an
aggregate principal amount at any one time outstanding which, when added to such
Lender's Revolving Percentage of the L/C Obligations then outstanding,  does not
exceed such Lender's Revolving Commitment;  provided,  that, after giving effect
thereto, the aggregate amount of Revolving Extensions of Credit then outstanding
shall not exceed the lesser of (i) Senior  Debt Limit at such time,  (ii) if the
Borrowing  Base is in  effect  on the  date  the  Revolving  Loan is  made,  the
Borrowing  Base on such date or (iii) the Total  Revolving  Commitments  at such
time. During the Revolving Commitment Period, the Borrower may use the Revolving
Commitments by borrowing,  prepaying and  reborrowing  the Revolving  Loans,  in
whole or in part, all in accordance  with the terms and conditions  hereof.  The
Revolving Loans may from time to time be Eurodollar Loans or Base Rate Loans, as
determined  by  the  Borrower  and  notified  to  the  Administrative  Agent  in
accordance with SECTIONS 2.2 and 3.3.

                (b) The Borrower shall repay all outstanding  Revolving Loans on
the Revolving Termination Date.

                                       20


          2.2.  PROCEDURE FOR REVOLVING LOAN BORROWING.  The Borrower may borrow
under the Revolving  Commitments  during the Revolving  Commitment Period on any
Business Day,  PROVIDED that the Borrower  shall give the  Administrative  Agent
irrevocable  notice (which notice must be received by the  Administrative  Agent
prior to 9:00 A.M., Los Angeles,  California time, (a) three Business Days prior
to the requested  Borrowing Date, in the case of Eurodollar Loans, or (b) on the
day of the requested Borrowing Date, in the case of Base Rate Loans), specifying
(i) the amount and Type of Revolving  Loans to be borrowed,  (ii) the  requested
Borrowing Date and (iii) in the case of Eurodollar Loans, the respective amounts
of each such Type of Revolving  Loan and the  respective  lengths of the initial
Interest Period therefor.  Each borrowing under the Revolving  Commitments shall
be in an amount equal to $5,000,000  or whole  multiples of $1,000,000 in excess
thereof (or, if the Unused  Commitments of the Lenders is less than  $5,000,000,
such lesser  amount).  Upon  receipt of any such notice from the  Borrower,  the
Administrative Agent shall promptly notify each Lender thereof. Each Lender will
make  the  amount  of its PRO  RATA  share of each  borrowing  available  to the
Administrative Agent for the account of the Borrower at the Funding Office prior
to 11:00 a.m., Los Angeles,  California time, on the Borrowing Date requested by
the Borrower in funds immediately  available to the  Administrative  Agent. Such
borrowing  will then be made  available  to the  Borrower by the  Administrative
Agent crediting the account of the Borrower on the books of such office with the
aggregate  of the amounts  made  available  to the  Administrative  Agent by the
Lenders and in like funds as received by the Administrative Agent.

          2.3.  COMMITMENT FEES, ETC.

                (a) The Borrower agrees to pay to the  Administrative  Agent for
the account of each Lender a  commitment  fee for the period from and  including
the Closing Date to the last day of the Revolving Commitment Period, computed at
the  Commitment  Fee  Rate  on the  daily  amount  of  such  Lender's  Revolving
Percentage  of the Unused  Commitments  during  the period for which  payment is
made,  payable  quarterly  in  arrears  on the  last  day of each  March,  June,
September  and December and on the  Revolving  Termination  Date,  commencing on
March 31, 2005.

                (b) The Borrower agrees to pay to the  Co-Administrative  Agents
the fees in the amounts and on the dates previously  agreed to in writing by the
Borrower and each of the Co-Administrative Agents.


          2.4.  TERMINATION OR REDUCTION OF REVOLVING  COMMITMENTS. The Borrower
shall have the  right,  upon not less than three  Business  Days'  notice to the
Co-Administrative  Agents, to terminate the Revolving  Commitments or, from time
to time,  to reduce the amount of the  Revolving  Commitments;  PROVIDED that no
such  termination or reduction of Revolving  Commitments  shall be permitted if,
after giving effect thereto and to any  prepayments of the Revolving  Loans made
on the effective date thereof,  the Total  Revolving  Extensions of Credit would
exceed the Total Revolving Commitments. Any such reduction shall be in an amount
equal to $5,000,000,  or whole  multiples of $1,000,000 in excess  thereof,  and
shall reduce permanently the Revolving Commitments then in effect.

          2.5.  THE LETTER OF CREDIT COMMITMENT.

                (a) Subject to the terms and  conditions  set forth herein,  (A)
each Issuing Lender  agrees,  in reliance upon the agreements of the Lenders set
forth in this  SECTION 2.5, (1) from time to time on any Business Day during the
period from the Closing Date until the L/C Expiration  Date, to issue Letters of
Credit for the account of the Borrower,  the Company or any  Subsidiary,  and to
amend Letters of Credit  previously  issued by it, in accordance with subsection
(b) below,  and (2) to honor drawings  under the Letters of Credit;  and (B) the
Lenders  severally  agree to  participate  in Letters  of Credit  issued for the
account  of the  Borrower,  the  Company  or any  Subsidiary  and  any  drawings
thereunder;  PROVIDED that after giving effect to any L/C Credit  Extension with
respect to any Letter of Credit,  (x) the Total  Revolving  Extensions of Credit
shall not exceed the Revolving  Commitments,  (y) the Aggregate  Exposure of any
Lender  shall  not  exceed  such  Lender's  Revolving  Commitment,  and  (z) the
aggregate  amount  of L/C  Obligations  shall  not  exceed  the L/C  Commitment;
PROVIDED FURTHER that each Issuing Lender may, but shall have no obligations to,
issue  any  Letter of Credit  if,  after  giving  effect to such  issuance,  the
aggregate L/C Obligations in respect of Letters of Credit issued by such Issuing
Lender  would exceed such Issuing  Lender's  L/C  Sublimit.  Each request by the
Borrower  for the issuance or amendment of a Letter of Credit shall be deemed to
be a  representation  by the Borrower that the L/C Credit Extension so requested
complies with the conditions set forth in the proviso to the preceding sentence.
Within the foregoing limits, and subject to the terms and conditions hereof, the
Borrower's  ability to obtain  Letters of Credit shall be fully  revolving,  and
accordingly  the Borrower  may,  during the period from the Closing Date through
the L/C Expiration  Date,  obtain Letters of Credit to replace Letters of Credit
that have  expired  or that have been drawn upon and  reimbursed.  All  Existing
Letters of Credit shall be deemed to have been issued pursuant hereto,  and from
and after the  Closing  Date shall be subject to and  governed  by the terms and
conditions hereof.

                                       21


                (b) No Issuing Lender shall issue any Letter of Credit, if:

                (i) the expiry  date of such  requested  Letter of Credit  would
     occur  more  than  thirteen  months  after  the  date of  issuance  or last
     extension, unless the Required Lenders have approved such expiry date; or

                (ii) the expiry date of such  requested  Letter of Credit  would
     occur after the L/C Expiration  Date,  unless all the Lenders have approved
     such expiry date;

except  Letters  of Credit  not to exceed  an  aggregate  amount at any one time
outstanding of $100,000,000 that are automatically renewed annually and that may
be  terminated  by notice  not more than  ninety  days  prior to such  Letter of
Credit's  annual  renewal  date,  provided  that such  Letters  of Credit are so
terminated prior to the L/C Expiration Date.

                (c) No Issuing Lender shall be under any obligation to issue any
Letter of Credit if:

                (i) any order, judgment or decree of any Governmental  Authority
     or arbitrator  shall by its terms purport to enjoin or restrain the Issuing
     Lender from issuing such Letter of Credit,  or any Law  applicable  to such
     Issuing Lender or any request or directive (whether or not having the force
     of law) from any Governmental Authority with jurisdiction over such Issuing
     Lender shall  prohibit,  or request that such Issuing  Lender refrain from,
     the  issuance  of letters of credit  generally  or such Letter of Credit in
     particular  or shall impose upon such  Issuing  Lender with respect to such
     Letter of Credit any restriction, reserve or capital requirement (for which
     such Issuing Lender is not otherwise  compensated  hereunder) not in effect
     on the  Closing  Date,  or  shall  impose  upon  such  Issuing  Lender  any
     unreimbursed  loss, cost or expense which was not applicable on the Closing
     Date and which such Issuing Lender in good faith deems material to it;

                (ii) the issuance of such Letter of Credit would  violate one or
     more policies of such Issuing Lender;

                (iii) except as otherwise agreed by the Administrative Agent and
     such Issuing  Lender,  such Letter of Credit is in an initial stated amount
     less  than  $100,000,  in the case of a  commercial  Letter of  Credit,  or
     $500,000, in the case of a standby Letter of Credit;

                (iv) such  Letter of Credit is to be  denominated  in a currency
     other than Dollars; or

                (v) a default of any Lender's  obligations to fund under SECTION
     2.7(B) exists or any Lender is at such time a Defaulting  Lender hereunder,
     unless such Issuing Lender has entered into satisfactory  arrangements with
     the Borrower or such Lender to eliminate  such Issuing  Lender's  risk with
     respect to such Lender.

                (d) No Issuing  Lender  shall amend any Letter of Credit if such
Issuing  Lender  would not be  permitted  at such time to issue  such  Letter of
Credit in its amended form under the terms hereof.

                (e) No Issuing Lender shall be under any obligation to amend any
Letter of Credit if (A) such  Issuing  Lender would have no  obligation  at such
time to issue such Letter of Credit in its amended form under the terms  hereof,
or (B) the  beneficiary  of such Letter of Credit  does not accept the  proposed
amendment to such Letter of Credit.

                (f) Each Issuing  Lender shall act on behalf of the Lenders with
     respect to any Letters of Credit issued by it and the documents  associated
     therewith,  and such  Issuing  Lender  shall have all of the  benefits  and
     immunities (A) provided to the Agents in SECTION 9 with respect to any acts
     taken or  omissions  suffered by such  Issuing  Lender in  connection  with
     Letters of Credit  issued by it or  proposed  to be issued by it and Issuer
     Documents  pertaining  to such  Letters  of  Credit as fully as if the term
     "Agent" as used in SECTION 9 included  such Issuing  Lender with respect to
     such  acts or  omissions,  and (B) as  additionally  provided  herein  with
     respect to such Issuing Lender.

                                       22


          2.6.  PROCEDURES FOR ISSUANCE AND AMENDMENT OF LETTERS OF CREDIT.

                (a) Each  Letter of Credit  shall be issued or  amended,  as the
case may be, upon the request of the  Borrower  delivered  to an Issuing  Lender
(with a copy to the  Administrative  Agent)  in the  form of a L/C  Application,
appropriately  completed  and signed by a  Responsible  Officer of the Borrower.
Such  L/C  Application   must  be  received  by  such  Issuing  Lender  and  the
Administrative  Agent not later than 11:00 a.m. at least two  Business  Days (or
such later date and time as the Administrative Agent and such Issuing Lender may
agree in a particular  instance in their sole discretion)  prior to the proposed
issuance date or date of amendment, as the case may be. In the case of a request
for an  initial  issuance  of a Letter of  Credit,  such L/C  Application  shall
specify in form and detail satisfactory to such Issuing Lender: (A) the proposed
issuance date of the requested Letter of Credit (which shall be a Business Day);
(B) the amount thereof; (C) the expiry date thereof; (D) the name and address of
the beneficiary  thereof;  (E) the documents to be presented by such beneficiary
in case of any drawing  thereunder;  (F) the full text of any  certificate to be
presented by such  beneficiary in case of any drawing  thereunder;  and (G) such
other matters as such Issuing  Lender may require.  In the case of a request for
an amendment of any outstanding  Letter of Credit,  such L/C  Application  shall
specify in form and detail satisfactory to such Issuing Lender (A) the Letter of
Credit to be amended; (B) the proposed date of amendment thereof (which shall be
a Business  Day); (C) the nature of the proposed  amendment;  and (D) such other
matters as such Issuing  Lender may require.  Additionally,  the Borrower  shall
furnish to such Issuing Lender and the Administrative Agent such other documents
and  information  pertaining  to such  requested  Letter of Credit  issuance  or
amendment as such Issuing Lender or the Administrative Agent may require.

                (b) Promptly after receipt of any L/C Application,  such Issuing
Lender will confirm with the  Administrative  Agent (by telephone or in writing)
that the  Administrative  Agent has received a copy of such L/C Application from
the Borrower  and, if not, such Issuing  Lender will provide the  Administrative
Agent with a copy  thereof.  Unless such  Issuing  Lender has  received  written
notice from any Lender, the Administrative Agent or any Loan Party, at least one
Business  Day  prior to the  requested  date of  issuance  or  amendment  of the
applicable Letter of Credit, that one or more applicable conditions contained in
SECTION 5 shall not then be satisfied, then, subject to the terms and conditions
hereof,  such Issuing  Lender shall,  on the requested  date,  issue a Letter of
Credit for the  account of the  Borrower  (or the  Company or a  Subsidiary,  as
applicable) or enter into the applicable amendment,  as the case may be, in each
case in  accordance  with such Issuing  Lender's  usual and  customary  business
practices.  Immediately upon the issuance of each Letter of Credit,  each Lender
shall be deemed  to,  and  hereby  irrevocably  and  unconditionally  agrees to,
purchase from such Issuing Lender a risk  participation in such Letter of Credit
in an amount equal to the product of such Lender's Aggregate Exposure Percentage
times the amount of such Letter of Credit.

                (c)  Promptly  after its delivery of any Letter of Credit or any
amendment to a Letter of Credit to an advising  bank with respect  thereto or to
the beneficiary  thereof,  such Issuing Lender will also deliver to the Borrower
and the  Administrative  Agent a true and complete copy of such Letter of Credit
or amendment.

                (d) In the event of any  conflict  between the terms  hereof and
the terms of any L/C Application, the terms hereof shall control.

                                       23


          2.7.  DRAWINGS AND REIMBURSEMENTS; FUNDING OF PARTICIPATIONS.

                (a) Upon receipt from the beneficiary of any Letter of Credit of
any notice of a drawing  under such Letter of Credit,  the Issuing  Lender shall
notify the Borrower and the Administrative  Agent thereof.  Not later than 11:00
a.m. on the date of any payment by such Issuing  Lender under a Letter of Credit
(each such date, an "HONOR  DATE"),  the Borrower  shall  reimburse such Issuing
Lender through the Administrative Agent in an amount equal to the amount of such
drawing. If the Borrower fails to so reimburse such Issuing Lender by such time,
the  Administrative  Agent shall promptly  notify each Lender of the Honor Date,
the amount of the  unreimbursed  drawing (the  "UNREIMBURSED  AMOUNT"),  and the
amount  of such  Lender's  Revolving  Percentage  thereof.  In such  event,  the
Borrower  shall be deemed to have  requested a borrowing of Base Rate  Revolving
Loans to be disbursed  on the Honor Date in an amount equal to the  Unreimbursed
Amount, without regard to the minimum and multiples specified in SECTION 2.2 for
the principal  amount of Base Rate Revolving Loans, but subject to the amount of
the unutilized portion of the Revolving Commitments and the conditions set forth
in SECTION 5.2. Any notice  given by such Issuing  Lender or the  Administrative
Agent  pursuant to this SECTION  2.7(A) may be given by telephone if immediately
confirmed in writing;  provided that the lack of such an immediate  confirmation
shall not affect the conclusiveness or binding effect of such notice.

                (b) Each Lender shall upon any notice pursuant to SECTION 2.7(A)
make funds available to the Administrative Agent for the account of such Issuing
Lender at the Administrative  Agent's office in an amount equal to its Revolving
Percentage of the  Unreimbursed  Amount not later than 1:00 p.m. on the Business
Day specified in such notice by the Administrative Agent, whereupon,  subject to
the  provisions  of SECTION  2.7(C),  each Lender that so makes funds  available
shall be deemed to have made a Base Rate  Revolving Loan to the Borrower in such
amount.  The  Administrative  Agent  shall  remit the funds so  received to such
Issuing Lender.

                (c) With  respect to any  Unreimbursed  Amount that is not fully
refinanced by a borrowing of Base Rate  Revolving  Loans because the  conditions
set forth in  SECTION  5.2  cannot be  satisfied  or for any other  reason,  the
Borrower  shall be  deemed to have  incurred  from  such  Issuing  Lender an L/C
Borrowing in the amount of the  Unreimbursed  Amount that is not so  refinanced,
which L/C Borrowing shall be due and payable on demand  (together with interest)
and shall bear  interest  at the rate  determined  in  accordance  with  SECTION
3.5(C). In such event, each Lender's payment to the Administrative Agent for the
account  of such  Issuing  Lender  pursuant  to SECTION  2.7(B)  shall be deemed
payment  in  respect  of its  participation  in such  L/C  Borrowing  and  shall
constitute an L/C Advance from such Lender in satisfaction of its  participation
obligation under this SECTION 2.7.

                (d) Until each  Lender  funds its  Revolving  Loan or LC Advance
pursuant to this  SECTION 2.7 to reimburse  such  Issuing  Lender for any amount
drawn under any Letter of Credit, interest in respect of such Lender's Revolving
Percentage  of such  amount  shall be solely  for the  account  of such  Issuing
Lender.

                (e)  Each  Lender's  obligation  to make  Revolving  Loans or LC
Advances to reimburse  such Issuing  Lender for amounts  drawn under  Letters of
Credit, as contemplated by this SECTION 2.7, shall be absolute and unconditional
and  shall  not be  affected  by any  circumstance,  including  (A) any  setoff,
counterclaim,  recoupment,  defense or other  right  which such  Lender may have
against  such  Issuing  Lender,  the Borrower or any other Person for any reason
whatsoever;  (B) the occurrence or  continuance  of a Default,  or (C) any other
occurrence,  event or condition, whether or not similar to any of the foregoing;
PROVIDED,  HOWEVER,  that  each  Lender's  obligation  to make  Revolving  Loans
pursuant to this SECTION 2.7 is subject to the  conditions  set forth in SECTION
5.2. No such  making of an L/C Advance  shall  relieve or  otherwise  impair the
obligation  of the Borrower to reimburse  such Issuing  Lender for the amount of
any payment  made by such Issuing  Lender  under any Letter of Credit,  together
with interest as provided herein.

                (f) If any Lender fails to make available to the  Administrative
Agent for the account of such Issuing  Lender any amount  required to be paid by
such Lender pursuant to the foregoing provisions of this SECTION 2.7 by the time
specified in SECTION  2.7(B),  such Issuing  Lender shall be entitled to recover
from such Lender (acting  through the  Administrative  Agent),  on demand,  such
amount  with  interest  thereon  for the  period  from the date such  payment is
required  to the date on which such  payment is  immediately  available  to such
Issuing  Lender at a rate per annum equal to the  greater of the  Federal  Funds
Rate and a rate  determined by such Issuing  Lender in  accordance  with banking
industry rules on interbank  compensation.  A certificate of such Issuing Lender
submitted to any Lender (through the  Administrative  Agent) with respect to any
amounts  owing under this SECTION  2.7(F) shall be  conclusive  absent  manifest
error.

                (g)   Notwithstanding   that  a  Letter  of  Credit   issued  or
outstanding hereunder is in support of any obligations of, or is for the account
of, the Company or a  Subsidiary,  the Borrower  shall be obligated to reimburse
the L/C Issuer  hereunder for any and all drawings  under such Letter of Credit.
The Borrower hereby  acknowledges that the issuance of Letters of Credit for the
account of the Company or  Subsidiaries  inures to the benefit of the  Borrower,
and  that  the  Borrower's  business  derives  substantial   benefits  from  the
businesses of the Company and the Subsidiaries.

                                       24


          2.8.  REPAYMENT OF PARTICIPATIONS.

                (a) At any time  after  such  Issuing  Lender has made a payment
under any Letter of Credit and has  received  from any Lender such  Lender's L/C
Advance in respect  of such  payment in  accordance  with  SECTION  2.7,  if the
Administrative Agent receives for the account of such Issuing Lender any payment
in respect of the  related  Unreimbursed  Amount or  interest  thereon  (whether
directly from the Borrower or otherwise,  including  proceeds of Cash Collateral
applied thereto by the  Administrative  Agent),  the  Administrative  Agent will
distribute  to such  Lender  its  Revolving  Percentage  thereof  (appropriately
adjusted, in the case of interest payments, to reflect the period of time during
which such  Lender's  L/C  Advance was  outstanding)  in the same funds as those
received by the Administrative Agent.

                (b) If any payment received by the Administrative  Agent for the
account of such  Issuing  Lender  pursuant  to SECTION  2.7(A) is required to be
returned  under any of the  circumstances  described in SECTION 10.7  (including
pursuant  to  any  settlement  entered  into  by  such  Issuing  Lender  in  its
discretion),  each Lender shall pay to the Administrative  Agent for the account
of such  Issuing  Lender  its  Revolving  Percentage  thereof  on  demand of the
Administrative  Agent, plus interest thereon from the date of such demand to the
date such amount is returned  by such  Lender,  at a rate per annum equal to the
Federal Funds Rate from time to time in effect.  The  obligations of the Lenders
under this clause shall survive the payment in full of the  Obligations  and the
termination of this Agreement.

          2.9. OBLIGATIONS ABSOLUTE. The obligation of the Borrower to reimburse
such Issuing  Lender for each  drawing  under each Letter of Credit and to repay
each L/C Borrowing shall be absolute,  unconditional and irrevocable,  and shall
be paid  strictly  in  accordance  with the  terms of this  Agreement  under all
circumstances, including the following:

                (a) any lack of  validity  or  enforceability  of such Letter of
Credit, this Agreement, or any other Loan Document;

                (b) the existence of any claim, counterclaim, setoff, defense or
other right that the Borrower or any Subsidiary may have at any time against any
beneficiary  or any  transferee of such Letter of Credit (or any Person for whom
any such beneficiary or any such transferee may be acting),  such Issuing Lender
or any other Person, whether in connection with this Agreement, the transactions
contemplated  hereby or by such Letter of Credit or any  agreement or instrument
relating thereto, or any unrelated transaction;

                (c) any draft,  demand,  certificate or other document presented
under  such  Letter of Credit  proving  to be  forged,  fraudulent,  invalid  or
insufficient in any respect or any statement  therein being untrue or inaccurate
in any  respect;  or any loss or delay in the  transmission  or otherwise of any
document required in order to make a drawing under such Letter of Credit;

                (d) any  payment by such  Issuing  Lender  under such  Letter of
Credit against  presentation  of a draft or  certificate  that does not strictly
comply  with the terms of such  Letter of Credit;  or any  payment  made by such
Issuing  Lender  under such  Letter of Credit to any Person  purporting  to be a
trustee  in  bankruptcy,  debtor-in-possession,  assignee  for  the  benefit  of
creditors,  liquidator,  receiver or other representative of or successor to any
beneficiary or any transferee of such Letter of Credit, including any arising in
connection with any proceeding under any Debtor Relief Law; or

                (e) any other circumstance or happening  whatsoever,  whether or
not similar to any of the foregoing, including any other circumstance that might
otherwise  constitute a defense available to, or a discharge of, the Borrower or
any Subsidiary.

                                       25


The  Borrower  shall  promptly  examine a copy of each Letter of Credit and each
amendment  thereto  that is  delivered  to it and,  in the event of any claim of
noncompliance  with  the  Borrower's  instructions  or other  irregularity,  the
Borrower will  immediately  notify such Issuing  Lender.  The Borrower  shall be
conclusively  deemed to have waived any such claim  against such Issuing  Lender
and its correspondents unless such notice is given as aforesaid.

          2.10. ROLE OF EACH ISSUING LENDER.  Each Lender and the Borrower agree
that, in paying any drawing under a Letter of Credit,  such Issuing Lender shall
not have any  responsibility to obtain any document (other than any sight draft,
certificates  and  documents  expressly  required by the Letter of Credit) or to
ascertain or inquire as to the validity or accuracy of any such  document or the
authority of the Person executing or delivering any such document.  None of such
Issuing  Lender,  the  Administrative  Agent,  any of their  respective  Related
Parties nor any  correspondent,  participant  or assignee of such Issuing Lender
shall be liable to any Lender for (i) any action taken or omitted in  connection
herewith  at the request or with the  approval  of the  Lenders or the  Required
Lenders, as applicable; (ii) any action taken or omitted in the absence of gross
negligence or willful  misconduct;  or (iii) the due  execution,  effectiveness,
validity or enforceability  of any document or instrument  related to any Letter
of Credit or Issuer Document.  The Borrower hereby assumes all risks of the acts
or omissions of any  beneficiary  or  transferee  with respect to its use of any
Letter of Credit;  provided,  however,  that this assumption is not intended to,
and shall not,  preclude the Borrower's  pursuing such rights and remedies as it
may have  against  the  beneficiary  or  transferee  at law or under  any  other
agreement.  None of such Issuing Lender,  the  Co-Administrative  Agents, any of
their respective Related Parties nor any correspondent,  participant or assignee
of such  Issuing  Lender shall be liable or  responsible  for any of the matters
described in clauses (a) through (e) of SECTION  2.9;  provided,  however,  that
anything in such clauses to the contrary notwithstanding,  the Borrower may have
a claim against such Issuing  Lender,  and such Issuing  Lender may be liable to
the Borrower,  to the extent,  but only to the extent, of any direct, as opposed
to  consequential  or  exemplary,  damages  suffered by the  Borrower  which the
Borrower proves were caused by such Issuing Lender's willful misconduct or gross
negligence or such Issuing  Lender's  willful failure to pay under any Letter of
Credit  after the  presentation  to it by the  beneficiary  of a sight draft and
certificate(s)  strictly  complying with the terms and conditions of a Letter of
Credit.  In  furtherance  and not in limitation of the  foregoing,  such Issuing
Lender may accept  documents  that appear on their face to be in order,  without
responsibility   for  further   investigation,   regardless  of  any  notice  or
information  to the contrary,  and such Issuing  Lender shall not be responsible
for the validity or sufficiency of any instrument  transferring  or assigning or
purporting  to  transfer  or assign a Letter of Credit or the rights or benefits
thereunder  or  proceeds  thereof,  in whole or in part,  which  may prove to be
invalid or  ineffective  for any  reason.  If any draft shall be  presented  for
payment under any Letter of Credit, the Issuing Lender shall promptly notify the
Borrower of the date and amount thereof.


          2.11. CASH COLLATERAL.  Upon the request of the Administrative  Agent,
(i) if such Issuing Lender has honored any full or partial drawing request under
any Letter of Credit and such drawing has resulted in an L/C Borrowing,  or (ii)
if, as of the L/C  Expiration  Date,  any L/C  Obligation for any reason remains
outstanding,  the Borrower shall, in each case,  immediately Cash  Collateralize
the then outstanding amount of all L/C Obligations.

          2.12. APPLICABILITY OF ISP AND UCP.  Unless otherwise expressly agreed
by such  Issuing  Lender  and the  Borrower  when a Letter  of  Credit is issued
(including any such agreement  applicable to an Existing Letter of Credit),  (i)
the rules of the ISP shall apply to each standby Letter of Credit,  and (ii) the
rules of the Uniform  Customs and  Practice  for  Documentary  Credits,  as most
recently  published  by the  International  Chamber of  Commerce  at the time of
issuance shall apply to each commercial Letter of Credit.

                                       26


          2.13. LETTER OF CREDIT FEES.

                (a) The Borrower shall pay to the  Administrative  Agent for the
account of each Lender in accordance  with its Revolving  Percentage a Letter of
Credit fee (the "LETTER OF CREDIT FEE") (i) for each commercial Letter of Credit
equal to the Applicable  Margin then in effect with respect to Eurodollar  Loans
per annum  times the daily  amount  available  to be drawn  under such Letter of
Credit,  and (ii) for each  standby  Letter  of Credit  equal to the  Applicable
Margin then in effect with respect to Eurodollar Loans per annum times the daily
amount  available  to be drawn  under such  Letter of Credit.  For  purposes  of
computing the daily amount available to be drawn under any Letter of Credit, the
amount of such Letter of Credit shall be determined  in accordance  with SECTION
1.3. Letter of Credit Fees shall be (i) computed on a quarterly basis in arrears
and (ii) due and payable on the L/C Fee Payment Date,  commencing with the first
such date to occur  after the  issuance  of such  Letter of  Credit,  on the L/C
Expiration  Date  and  thereafter  on  demand.  If there  is any  change  in the
Applicable Margin in effect with respect to Eurodollar Loans during any quarter,
the daily amount available to be drawn under each standby Letter of Credit shall
be computed and  multiplied by the  Applicable  Margin in effect with respect to
Eurodollar  Loans  separately  for each  period  during such  quarter  that such
Applicable  Margin  was in  effect.  Notwithstanding  anything  to the  contrary
contained herein,  upon the request of the Required Lenders,  while any Event of
Default exists, all Letter of Credit Fees shall accrue at the rate determined in
accordance with SECTION 3.5(C).

                (b) The Borrower  shall pay directly to such Issuing  Lender for
its own account a fronting  fee (i) with  respect to each  commercial  Letter of
Credit,  at the rate of 0.125% per annum,  computed on the amount of such Letter
of Credit,  and payable  upon the  issuance  thereof,  (ii) with  respect to any
amendment of a commercial  Letter of Credit increasing the amount of such Letter
of Credit,  at a rate  separately  agreed  between the Borrower and such Issuing
Lender,  computed  on  the  amount  of  such  increase,  and  payable  upon  the
effectiveness  of such amendment,  and (iii) with respect to each standby Letter
of  Credit,  at the rate of 0.125%  per  annum,  computed  on the  daily  amount
available  to be drawn  under  such  Letter of Credit  on a  quarterly  basis in
arrears,  and due and payable on the L/C Fee Payment Date,  commencing  with the
first such date to occur after the issuance of such Letter of Credit, on the L/C
Expiration  Date and  thereafter on demand.  For purposes of computing the daily
amount  available  to be drawn  under any Letter of  Credit,  the amount of such
Letter  of Credit  shall be  determined  in  accordance  with  SECTION  1.3.  In
addition,  the Borrower  shall pay  directly to such Issuing  Lender for its own
account the customary  issuance,  presentation,  amendment and other  processing
fees, and other standard costs and charges,  of such Issuing Lender  relating to
letters  of credit  as from  time to time in  effect.  Such  customary  fees and
standard costs and charges are due and payable on demand and are nonrefundable.


          2.14. BORROWING BASE AND COLLATERAL VALUE DETERMINATION

                (a) The  Borrowing  Base  will be in effect at any time that (i)
the rating for the Index  Debt by S&P is equal to or less  favorable  than BB or
(ii) the rating for the Index Debt by Moody's is equal to or less favorable than
Ba2 or (iii) neither S&P nor Moody's maintains a rating for Index Debt; PROVIDED
that if a rating for the Index Debt shall be  maintained  by only one of S&P and
Moody's,  the  Borrowing  Base will be in effect at any time that such rating is
the applicable  rating  specified under clause (i) or (ii). At any time that the
foregoing sentence is not applicable,  the Borrowing Base will be in effect, but
will cease to be in effect when the Borrower has provided the  Co-Administrative
Agents and the Lenders written notice of its election to have availability under
this Agreement governed without reference to the Borrowing Base no later than 30
days prior to the effective date of such  election,  except during any period as
the Borrower has otherwise  elected in accordance  with SECTION  2.14(B) to have
availability  under  this  Agreement  governed  by the  Borrowing  Base.  If the
Borrowing Base shall not be in effect,  availability  under this Agreement shall
be determined  with  reference to the Senior Debt Limit and the Total  Revolving
Commitments. The Collateral Value determination shall cease to be made after the
Collateral Release Date.

                (b) If the Borrower has previously  elected to have availability
under this  Agreement  governed  without  reference to the Borrowing  Base,  the
Borrower may from time to time elect to have  availability  under this Agreement
governed by the Borrowing  Base for the period  between the next two  successive
scheduled  Determination  Dates  (a  "BORROWING  BASE  PERIOD")  by  giving  the
Co-Administrative Agents and the Lenders written notice of its election no later
than 30 days prior to the delivery  under SECTION  6.2(D) of the next  scheduled
semi-annual  Engineering  Report.  Once such election is made,  the Borrower may
elect to opt out of such election only at the end of any Borrowing  Base Period,
if the Borrowing Base is not required to be in effect under SECTION 2.14(A),  by
giving  the  Co-Administrative  Agents  and the  Lenders  written  notice of its
election to opt out of its  election no later than 30 days prior to the delivery
under SECTION 6.2(D) of the next scheduled semi-annual  Engineering Report prior
to the end of such Borrowing Base Period.


                                       27


                (c)  During  the  period  from  the  Closing  Date to the  first
Determination  Date following the Closing Date redetermining the Borrowing Base,
the Borrowing Base is $1,250,000,000. During the period from the Closing Date to
the first  Determination Date redetermining the Collateral Value, the Collateral
Value is $1,875,000,000.

                (d)  Within 45 days after  receiving  the  relevant  Engineering
Reports  with respect to any  Evaluation  Date and the  respective  accompanying
reports and  information  thereto  required to be furnished  pursuant to SECTION
6.2(D), or as promptly  thereafter as practicable,  the Required Lenders (or, in
the case of any increase in the Borrowing  Base, the holders of more than 90% of
the Total Revolving  Commitments then in effect or, if the Revolving Commitments
have been terminated, the Total Revolving Extensions of Credit then outstanding)
shall agree upon an amount for the  Collateral  Value or the Borrowing  Base, as
the case may be, as applicable  with respect to such  Evaluation  Date,  and the
Co-Administrative  Agents shall by notice to the Borrower designate such amounts
as the new Collateral Value and Borrowing Base, respectively,  which designation
shall  take  effect  immediately  on the date of such  notice  (herein  called a
"DETERMINATION  DATE") and shall  remain in effect until but not  including  the
next date as of which the  Collateral  Value or the Borrowing  Base, as the case
may be, are redetermined. If the Borrower does not furnish all such information,
reports and data by the date specified in SECTION 6.2(D), the  Co-Administrative
Agents may nonetheless  designate the Collateral Value or the Borrowing Base, as
the case may be, at any amount  which the  Required  Lenders  determine  and may
redesignate the Collateral Value or the Borrowing Base, as the case may be, from
time to time  thereafter  in a similar  manner  until each Lender  receives  all
information,  reports and data,  whereupon the Required  Lenders shall designate
the  Collateral  Value or the  Borrowing  Base, as the case may be, as described
above.  The Required  Lenders shall determine the Collateral  Value based on the
reports  delivered  pursuant to SECTION 6.2(D) and the average of the applicable
price assumptions used by the  Co-Administrative  Agents in evaluating their oil
and gas loans generally as determined by the  Co-Administrative  Agents and such
determination  of the Collateral Value shall deduct the net present value of the
reserves  projected to be produced on or prior to the next scheduled  Evaluation
Date.  The Required  Lenders shall  determine  the amount of the Borrowing  Base
based (i) upon the total debt of the Company and its  Subsidiaries  and upon the
loan value  which they in their  discretion  assign to the  various  oil and gas
properties of the Company and its  Subsidiaries  at such time and (ii) upon such
other  credit  factors   (including,   without   limitation,   (A)  the  assets,
liabilities,  cash  flow,  hedged and  unhedged  exposure  to price,  agreements
affecting  reserves,  business,  properties,  prospects,  production  history of
reserves,  nature of the ownership of the reserves,  Liens affecting properties,
management  and  ownership  of the  Company  and its  Subsidiaries,  (B) foreign
exchange rate changes and interest rate changes, (C) the general policies of the
Required Lenders from time to time with respect to the prices used in evaluating
their  oil and gas  loans  generally  and (D) the  Collateral)  as they in their
discretion deem significant. It is expressly understood that the Lenders and the
Co-Administrative  Agents  have no  obligation  to agree upon or  designate  the
Collateral Value or the Borrowing Base at any particular  amount.  It is further
expressly  understood  that no  determinations  or designations of the Borrowing
Base will be made or will be effective, and the references to the Borrowing Base
in this SECTION  2.14(D)  shall be  disregarded,  at any time that the Borrowing
Base is not in effect as provided in SECTION 2.14(A).

                (e) Until the  termination of the Revolving  Commitment  Period,
the Borrower may, during the 15-day period beginning on each Determination Date,
reduce the Borrowing  Base,  when in effect,  from the amount  designated by the
Co-Administrative Agents to any lesser amount by delivering a notice during such
period to the Co-Administrative Agents to that effect, with such reduction to be
effective as of the date such notice is received by the Co-Administrative Agents
and  shall  continue  in  effect  until  such  time  as the  Borrowing  Base  is
redetermined  in accordance  with SECTION 2.14(D) or not in effect in accordance
with SECTION 2.14(A).

                                       28

                (f) Concurrently with the delivery of the notice by the Borrower
of its  election to have  availability  under this  Agreement  governed  without
reference to the Borrowing Base and with each delivery of an Engineering  Report
pursuant  to SECTION  6.2(D) when the ratio of PV to  Consolidated  Indebtedness
contained in SECTION  7.1(C) is  applicable,  the  Borrower  will provide to the
Co-Administrative  Agents and Lenders a certificate of a Responsible  Officer of
the Company and the Borrower  reflecting in reasonable detail the calculation of
PV.

                (g) All of the Collateral consisting of the Mortgaged Properties
(but excluding Cash  Collateral to the extent  applicable)  shall be released by
the Administrative  Agent promptly following the written request of the Borrower
made to the Co-Administrative  Agents so long as all of the following conditions
are satisfied on the date of such actual release (the date of the actual release
called  "COLLATERAL  RELEASE DATE"):  (i) the ratings of the Index Debt shall be
maintained  by S&P at BBB- or better and shall be  maintained by Moody's at Baa3
or better; provided that if only one of S&P or Moody's provides a rating for the
Index Debt such rating shall be  maintained at BBB- or better or Baa3 or better,
as  applicable,  (ii) all Liens  permitted  under SECTION  7.3(J) or (M) and all
covenants and agreements  relating to the Indebtedness and obligations  referred
to in SECTION  7.3(J) or (M) that require or could  require Liens to secure such
Indebtedness  and obligations  have been released and  discharged;  and (iii) no
Default  or Event of Default  shall have  occurred  and be  continuing  or shall
result therefrom.

          SECTION 3. GENERAL PROVISIONS APPLICABLE TO REVOLVING LOANS
                              AND LETTERS OF CREDIT


          3.1.  OPTIONAL PREPAYMENTS. The Borrower may at any time and from time
to time prepay the  Revolving  Loans,  in whole or in part,  without  premium or
penalty,  upon irrevocable notice delivered to the Administrative Agent at least
three  Business Days prior thereto in the case of Eurodollar  Loans and at least
one  Business  Day prior  thereto in the case of Base Rate Loans,  which  notice
shall specify the date and amount of prepayment and whether the prepayment is of
Eurodollar  Loans or Base Rate Loans;  PROVIDED,  that if a  Eurodollar  Loan is
prepaid on any day other  than the last day of the  Interest  Period  applicable
thereto, the Borrower shall also pay any amounts owing pursuant to SECTION 3.11.
Upon receipt of any such notice the  Administrative  Agent shall promptly notify
each Lender thereof.  If any such notice is given,  the amount specified in such
notice shall be due and payable on the date  specified  therein,  together  with
(except  in the  case of  Revolving  Loans  that are Base  Rate  Loans)  accrued
interest to such date on the amount  prepaid.  Partial  prepayments of Revolving
Loans shall be in an aggregate principal amount of $5,000,000 or whole multiples
of $1,000,000 in excess thereof.

                                       29


          3.2.  MANDATORY PREPAYMENTS

                (a) If at any time  prior  to the  Collateral  Release  Date the
Collateral  Coverage Ratio is less than 1.5 to 1.0 (the  "COLLATERAL  DEFICIENCY
DATE"), the Borrower shall either:

                (i) Give notice to the  Co-Administrative  Agents that it elects
     to reduce  the  Borrowing  Base,  if  applicable,  or the  Total  Revolving
     Commitments  and prepay the  Revolving  Loans to the  extent  necessary  to
     comply  with the  Collateral  Coverage  Ratio at such  time  whereupon  the
     Borrowing Base, if applicable,  or the Total Revolving Commitments shall be
     so  reduced  with  immediate  effect  and  the  Borrower  shall  make  such
     prepayment  on or  before  the  date  that is 30  days  after  the  related
     Collateral  Deficiency  Date  and  to the  extent  such  prepayment  of the
     aggregate   principal   amount  of  Revolving  Loans  then  outstanding  is
     insufficient  to result in compliance  with the Collateral  Coverage Ratio,
     the  Borrower  shall,  to  the  extent  of  such   insufficiency,   replace
     outstanding Letters of Credit and/or Cash Collateralize L/C Obligations; or

                (ii) Certify to the  Co-Administrative  Agents that the Borrower
     has good and  defensible  title,  free of any  Liens,  to Proved  Developed
     Properties in an amount which, if subject to one or more  Mortgages,  would
     result in the Borrower being in compliance  with such  Collateral  Coverage
     Ratio  (including  the value of the related  Other  Proved  Reserves to the
     extent provided in the definition of Collateral Value), and provide to each
     Lender the same information  regarding such Proved Developed  Properties as
     would be required for an evaluation of the  Collateral  Value  attributable
     thereto by the Required  Lenders under  SECTION 2.14.  Within 10 days after
     such  certification,  the Required  Lenders shall either (x) determine that
     such  properties,  if subject to a Mortgage,  would  result in the Borrower
     being in compliance with such Collateral Coverage Ratio, in which case, the
     Borrower shall within 20 days of such  certification,  and in any event, no
     later than  within 30 days of the  Collateral  Deficiency  Date,  deliver a
     Mortgage  (or a  satisfactory  amendment  to an Existing  Mortgage)  to the
     Administrative  Agent  with  respect  to  each  of  such  Proved  Developed
     Properties,  executed and  delivered by a duly  authorized  officer of each
     party  thereto  and  accompanied  by  such  other   documentation   as  the
     Co-Administrative  Agents  shall  reasonably  request  (including,  without
     limitation,  legal  opinions  in form  and  substance  satisfactory  to the
     Co-Administrative  Agents  relating  thereto)  or (y)  determine  that such
     properties,  if subject  to a  Mortgage,  would not result in the  Borrower
     being in compliance with such Collateral Coverage Ratio, in which case, the
     Borrower  shall make the  prepayments  specified in subsection  (i) of this
     SECTION 3.2(A) within 30 days of the Collateral Deficiency Date.

                (b) If at any time the Borrowing Base is in effect (A) the Total
Revolving  Extensions of Credit exceed (B) the Borrowing Base at such time (such
excess,  the "BORROWING BASE  DEFICIENCY") the  Administrative  Agent shall give
notice thereof to the Borrower (a "BORROWING BASE DEFICIENCY NOTICE") and within
30 days after the date of such Borrowing Base  Deficiency  Notice,  the Borrower
shall either:

                (i) Give notice to the  Co-Administrative  Agents that it elects
     to prepay the Revolving  Loans in an amount at least equal to the Borrowing
     Base  Deficiency  whereupon the Borrower  shall make such  prepayment on or
     before  the  date  that is 60 days  after  the date of the  Borrowing  Base
     Deficiency  and, to the extent such  prepayment of the aggregate  principal
     amount of Revolving Loans then outstanding is less than such Borrowing Base
     Deficiency,  the Borrower shall,  to the extent of such shortfall,  replace
     outstanding Letters of Credit and/or Cash Collateralize L/C Obligations; or

                (ii) Give notice to the Co-Administrative  Agents that it elects
     to prepay the Revolving Loans in an aggregate amount equal to the Borrowing
     Base  Deficiency  (or,  to the extent  such  prepayments  of the  aggregate
     principal  amount of  Revolving  Loans then  outstanding  are less than the
     Borrowing Base  Deficiency,  replace  outstanding  Letters of Credit and/or
     Cash  Collateralize  L/C  Obligations)  in six  consecutive  equal  monthly
     installments,  whereupon the Borrower shall pay the first such  installment
     30 days after the date of the Borrowing  Base  Deficiency and the next five
     such installments on the same day of each consecutive month thereafter; or

                                       30



                (iii)  (A)  Certify  to the  Co-Administrative  Agents  that the
     Borrower has good and defensible  title,  free of any Liens, to oil and gas
     properties not included in the  determination of the Borrowing Base then in
     effect in an amount  which,  if taken into  account in such  determination,
     would  eliminate the  Borrowing  Base  Deficiency,  and (B) provide to each
     Lender the same information  regarding such properties as would be required
     for an evaluation of the value attributable thereto by the Required Lenders
     under SECTION 2.14 in calculating the Borrowing Base.  Within 30 days after
     such  certification,  if the Required  Lenders shall  determine that taking
     into account such  properties in the  determination  of the Borrowing  Base
     would not be sufficient to result in the  elimination of the Borrowing Base
     Deficiency, the Borrower shall either (x) make the prepayments specified in
     subsection  (i)  of  this  SECTION  3.2(B)  immediately  or  (y)  make  the
     installment prepayments specified in subsection (ii) of this SECTION 3.2(B)
     with the first such installment due immediately.

                (c) The  Total  Revolving  Commitments  shall be  reduced  by an
amount equal to any Excess Amount and shall be  accompanied by prepayment of the
Revolving Loans to the extent,  if any, that the Total  Revolving  Extensions of
Credit exceed the Total  Revolving  Commitments as so reduced,  PROVIDED that if
the aggregate amount of Revolving Loans then outstanding is less than the amount
of such Excess Amount (because L/C Obligations constitute a portion of the Total
Revolving  Extensions  of  Credit),  the  Borrower  shall,  to the extent of the
balance of such Excess Amount, replace outstanding Letters of Credit and/or Cash
Collateralize L/C Obligations.

          3.3.  CONVERSION AND CONTINUATION OPTIONS

                (a) The  Borrower  may  elect  from  time  to  time  to  convert
Eurodollar  Loans to Base Rate Loans by giving the  Administrative  Agent  prior
irrevocable notice of such election by 9:00 A.M., Los Angeles,  California time,
three  Business  Days  preceding  the day on which such  conversion is to occur,
provided that any such  conversion  of Eurodollar  Loans may only be made on the
last day of an Interest Period with respect thereto. The Borrower may elect from
time to time to convert  Base Rate  Loans to  Eurodollar  Loans by giving  prior
irrevocable  notice  to the  Administrative  Agent by 9:00  A.M.,  Los  Angeles,
California  time,  three  Business Days prior to such  conversion  (which notice
shall specify the length of the initial Interest Period therefor), provided that
no Base  Rate Loan may be  converted  into a  Eurodollar  Loan when any Event of
Default has  occurred  and is  continuing  and the  Administrative  Agent or the
Majority  Lenders have  determined in its or their sole discretion not to permit
such conversions. Upon receipt of any such notice the Administrative Agent shall
promptly notify each Lender thereof.

                (b) Any  Eurodollar  Loan  may be  continued  as such  upon  the
expiration  of the then  current  Interest  Period with  respect  thereto by the
Borrower giving irrevocable  notice to the  Administrative  Agent, in accordance
with the  applicable  provisions  of the term  "Interest  Period"  set  forth in
SECTION 1.1, of the length of the next Interest  Period to be applicable to such
Eurodollar Loans, PROVIDED that no Eurodollar Loan may be continued as such when
any Event of Default has occurred and is continuing and the Administrative Agent
has or the Majority  Lenders have determined in its or their sole discretion not
to permit such continuations,  and PROVIDED, FURTHER, that if the Borrower shall
fail to give any required notice as described above in this paragraph or if such
continuation is not permitted  pursuant to the preceding proviso such Eurodollar
Loans  shall be  automatically  converted  to Base Rate Loans on the last day of
such  then  expiring  Interest  Period.  Upon  receipt  of any such  notice  the
Administrative Agent shall promptly notify each Lender thereof.

                                       31


          3.4.  LIMITATIONS  ON EURODOLLAR TRANCHES. Notwithstanding anything to
the contrary in this Agreement, all borrowings, conversions and continuations of
Eurodollar  Loans  hereunder and all  selections of Interest  Periods  hereunder
shall be in such amounts and be made  pursuant to such  elections  so that,  (a)
after giving effect thereto,  the aggregate  principal  amount of the Eurodollar
Loans  comprising each Eurodollar  Tranche shall be equal to $5,000,000 or whole
multiples of $1,000,000 in excess  thereof and (b) no more than five  Eurodollar
Tranches shall be outstanding at any one time.  3.5.  INTEREST RATES AND PAYMENT
DATES

          3.5   INTEREST RATES AND PAYMENT DATES

                (a) Each Eurodollar Loan shall bear interest for each day during
each  Interest  Period  with  respect  thereto at a rate per annum  equal to the
Eurodollar Rate determined for such day plus the Applicable Margin.

                (b) Each Base Rate Loan shall bear  interest at a rate per annum
equal to the Base Rate plus the Applicable Margin.

                (c)  (i) If all or a  portion  of the  principal  amount  of any
Revolving  Loan or L/C  Obligation  shall not be paid when due  (whether  at the
stated maturity,  by acceleration or otherwise),  such overdue amount shall bear
interest  at a rate per annum equal to (x) in the case of the  Revolving  Loans,
the rate that would  otherwise be applicable  thereto  pursuant to the foregoing
provisions  of this Section PLUS 2% or (y) in the case of L/C  Obligations,  the
rate  applicable to Base Rate Loans PLUS 2%, and (ii) if all or a portion of any
interest  payable on any Revolving  Loan or L/C Obligation or any commitment fee
or other  amount  payable  hereunder  shall not be paid when due (whether at the
stated maturity,  by acceleration or otherwise),  such overdue amount shall bear
interest  at a rate per  annum  equal to the rate then  applicable  to Base Rate
Loans PLUS 2%, in each case,  with  respect to clauses (i) and (ii) above,  from
the date of such non-payment until such amount is paid in full (as well after as
before judgment).

                (d)  Interest  shall be  payable  in  arrears  on each  Interest
Payment Date,  PROVIDED that interest accruing pursuant to paragraph (c) of this
Section shall be payable from time to time on demand.

          3.6.  COMPUTATION OF INTEREST AND FEES

                (a)  Interest  and  fees  payable   pursuant   hereto  shall  be
calculated  on the basis of a 360-day year for the actual days  elapsed,  except
that,  with  respect  to Base  Rate  Loans  the  rate of  interest  on  which is
calculated on the basis of the  Reference  Rate,  the interest  thereon shall be
calculated on the basis of a 365- (or 366-, as the case may be) day year for the
actual days  elapsed.  The  Administrative  Agent  shall as soon as  practicable
notify the Borrower and the Lenders of each  determination of a Eurodollar Rate.
Any change in the interest rate on a Revolving  Loan  resulting from a change in
the Base Rate or the Eurocurrency Reserve Requirements shall become effective as
of the opening of business  on the day on which such change  becomes  effective.
The  Administrative  Agent shall as soon as practicable  notify the Borrower and
the Lenders of the effective date and the amount of each such change in interest
rate.

                (b) Each determination of an interest rate by the Administrative
Agent  pursuant to any  provision  of this  Agreement  shall be  conclusive  and
binding on the  Borrower and the Lenders in the absence of manifest  error.  The
Administrative  Agent  shall,  at the  request of the  Borrower,  deliver to the
Borrower a statement showing the quotations used by the Administrative  Agent in
determining any interest rate pursuant to SECTION 3.5(A).

                                       32


          3.7.  INABILITY TO DETERMINE INTEREST RATE. If prior to the first day
of any Interest Period:

                (a)  the  Administrative  Agent  shall  have  determined  (which
determination shall be conclusive and binding upon the Borrower) that, by reason
of circumstances affecting the relevant market, adequate and reasonable means do
not exist for ascertaining the Eurodollar Rate for such Interest Period; or

                (b) the Administrative Agent shall have received notice from the
Majority  Lenders that the  Eurodollar  Rate  determined or to be determined for
such Interest  Period will not  adequately  and fairly  reflect the cost to such
Lenders (as  conclusively  certified by such  Lenders) of making or  maintaining
their affected  Revolving Loans during such Interest Period,  the Administrative
Agent  shall  give  telefacsimile,  email or  telephonic  notice  thereof to the
Borrower and the Lenders as soon as  practicable  thereafter.  If such notice is
given (x) any  Eurodollar  Loans  requested  to be made on the first day of such
Interest  Period shall be made as Base Rate Loans,  (y) any Revolving Loans that
were to  have  been  converted  on the  first  day of such  Interest  Period  to
Eurodollar  Loans shall be continued as Base Rate Loans and (z) any  outstanding
Eurodollar  Loans  shall  be  converted,  on the  last  day of the  then-current
Interest Period, to Base Rate Loans. Until such notice has been withdrawn by the
Administrative  Agent, no further Eurodollar Loans shall be made or continued as
such,  nor  shall the  Borrower  have the right to  convert  Revolving  Loans to
Eurodollar Loans.

          3.8.  PRO RATA TREATMENT AND PAYMENTS

                (a) Each  borrowing by the Borrower from the Lenders  hereunder,
each payment by the Borrower on account of any  commitment fee and any reduction
of the Revolving  Commitments of the Lenders shall be made pro rata according to
the Revolving Percentages of the Lenders.

                (b) Each payment  (including each prepayment) by the Borrower on
account of principal of and  interest on the  Revolving  Loans shall be made PRO
RATA according to the respective  outstanding principal amounts of the Revolving
Loans then held by the Lenders.

                (c)  All  payments  (including  prepayments)  to be  made by the
Borrower  hereunder,  whether  on  account  of  principal,   interest,  fees  or
otherwise,  shall be made without setoff or counterclaim and shall be made prior
to 11:00 A.M.,  Los  Angeles,  California  time,  on the due date thereof to the
Administrative  Agent, for the account of the Lenders, at the Funding Office, in
Dollars and in  immediately  available  funds.  The  Administrative  Agent shall
distribute  such payments to the Lenders  promptly upon receipt in like funds as
received. If any payment hereunder (other than payments on the Eurodollar Loans)
becomes due and payable on a day other than a Business  Day,  such payment shall
be extended to the next succeeding  Business Day. If any payment on a Eurodollar
Loan  becomes due and payable on a day other than a Business  Day,  the maturity
thereof shall be extended to the next succeeding  Business Day unless the result
of such extension  would be to extend such payment into another  calendar month,
in which event such payment shall be made on the immediately  preceding Business
Day. In the case of any  extension of any payment of  principal  pursuant to the
preceding  two  sentences,  interest  thereon  shall  be  payable  at  the  then
applicable rate during such extension.

                (d) Unless the Administrative  Agent shall have been notified in
writing by any Lender  prior to a  borrowing  that such Lender will not make the
amount  that  would  constitute  its share of such  borrowing  available  to the
Administrative  Agent, the  Administrative  Agent may assume that such Lender is
making such amount available to the Administrative Agent, and the Administrative
Agent may, in reliance upon such  assumption,  make  available to the Borrower a
corresponding amount. If such amount is not made available to the Administrative
Agent by the required time on the Borrowing Date therefor, such Lender shall pay
to the Administrative  Agent, on demand,  such amount with interest thereon at a
rate equal to the daily  average  Federal  Funds  Effective  Rate for the period
until such Lender makes such amount immediately  available to the Administrative
Agent. A certificate of the  Administrative  Agent  submitted to any Lender with
respect to any amounts  owing under this  paragraph  shall be  conclusive in the
absence of manifest  error. If such Lender's share of such borrowing is not made
available to the Administrative  Agent by such Lender within three Business Days
of such  Borrowing  Date,  the  Administrative  Agent  shall also be entitled to
recover such amount with  interest  thereon at the rate per annum  applicable to
Base Rate Loans, on demand, from the Borrower.

                                       33


                (e) Unless the Administrative  Agent shall have been notified in
writing by the  Borrower  prior to the date of any payment due to be made by the
Borrower  hereunder  that  the  Borrower  will  not  make  such  payment  to the
Administrative  Agent, the Administrative  Agent may assume that the Borrower is
making such payment, and the Administrative Agent may, but shall not be required
to, in reliance  upon such  assumption,  make  available  to the  Lenders  their
respective  PRO RATA shares of a  corresponding  amount.  If such payment is not
made to the  Administrative  Agent by the Borrower  within three  Business  Days
after such due date, the Administrative  Agent shall be entitled to recover,  on
demand,  from each Lender to which any amount which was made available  pursuant
to the preceding  sentence,  such amount with  interest  thereon at the rate per
annum equal to the daily average Federal Funds  Effective  Rate.  Nothing herein
shall be deemed to limit the  rights of the  Administrative  Agent or any Lender
against the Borrower.

                (f) The Borrower and any Lender shall have the option, from time
to time, to execute and deliver to the Administrative Agent a Pari Passu Hedging
Obligation  Notice  designating a fixed dollar  amount as the  allocation of the
maximum  amount of Pari Passu  Hedging  Obligations  for a stated Lender and its
Affiliates (a "PARI PASSU HEDGING  OBLIGATION  ALLOCATION"),  and the Pari Passu
Hedging  Obligation   Allocation  of  any  Lender  and  its  Affiliates  may  be
terminated,  increased or decreased from time to time by a subsequent Pari Passu
Hedging  Obligation  Notice  executed by the Borrower and such Lender;  provided
that (i) the  maximum  aggregate  amount  of all  Pari  Passu  Hedge  Obligation
Allocations at any one time shall not exceed  $150,000,000 and (ii) no such Pari
Passu  Hedging  Obligation  Notice shall be effective  until the  Administrative
Agent shall have  executed  and  delivered  to the Borrower and such Lender such
notice   confirming  such  Pari  Passu  Hedging   Obligation   Allocation.   The
Administrative  Agent shall maintain a register to record all Pari Passu Hedging
Obligation  Allocations.  The obligations under the Lender Hedge Agreements with
such Lender and its  Affiliates  that exceed such  Lender's  Pari Passu  Hedging
Obligation Allocation shall not be Pari Passu Hedging Obligations. The aggregate
amount of Pari Passu Hedging Obligations  outstanding from time to time shall be
considered  Obligations for purposes of each of the Security Documents and shall
be secured by all the  Collateral  granted  thereunder  in  accordance  with the
following SECTION 3.8(G).

                (g)  Notwithstanding  anything in this  SECTION 3.8 or in any of
the Loan Documents to the contrary,  in the event that the Revolving Loans shall
have  become due and  payable,  and the  Revolving  Commitments  shall have been
terminated,  pursuant to SECTION 8, any amounts  received by the  Administrative
Agent from the Loan  Parties or their  Subsidiaries  or from the  Collateral  in
respect of the Borrower's Obligations shall be applied in the following order of
priority:

                (i) First, to reimburse each of the Co-Administrative Agents for
     its fees, costs and expenses pursuant to the Loan Documents;

                (ii) Second,  to pay unpaid  interest  accrued on the  Revolving
     Loans;

                (iii)  Third,  (A)  to pay  all  other  outstanding  Obligations
     (whether or not contingent) under, out of, or in connection with any of the
     Loan Documents or Letters of Credit, including the outstanding principal of
     the Revolving Loans and, after the payment of the outstanding  principal of
     the Revolving Loans, to Cash Collateralize  outstanding L/C Obligations and
     (B) to pay Pari Passu Hedging  Obligations  (applied  ratably to (A) and to
     (B) based upon the total  outstanding  Obligations under (A) and the lesser
     of the  total  outstanding  Pari  Passu  Hedging  Obligations  under (B) or
     $150,000,000); and

                (iv) Fourth, once all of the foregoing  Obligations  (whether or
     not contingent) and Pari Passu Hedging  Obligations have been  indefeasibly
     paid in full  and all  Letters  of  Credit  have  been  terminated  or Cash
     Collateralized, to the Borrower.

Administrative  Agent shall have no responsibility to determine the existence or
amount of Pari Passu Hedging Obligations and may reserve from the application of
amounts under this SECTION 3.8(G) amounts distributable in respect of Pari Passu
Hedging  Obligations  until it has received  evidence  satisfactory to it of the
existence and amount of such Pari Passu Hedging Obligations.

          3.9.  REQUIREMENTS OF LAW

                (a) If the adoption of or any change in any  Requirement  of Law
or in the interpretation or application thereof or compliance by any Lender with
any  request  or  directive  (whether  or not  having the force of law) from any
central bank or other Governmental Authority made subsequent to the date hereof:

                (i) shall  subject any Lender to any tax of any kind  whatsoever
     with respect to this  Agreement,  any Letter of Credit,  any Application or
     any Eurodollar Loan made by it, or change the basis of taxation of payments
     to such Lender in respect thereof (except for Non-Excluded Taxes covered by
     SECTION  3.10 and  changes in the rate of tax on the  overall net income of
     such Lender);

                                       34


                (ii)  shall  impose,  modify  or hold  applicable  any  reserve,
     special deposit, compulsory loan or similar requirement against assets held
     by, deposits or other liabilities in or for the account of, advances, loans
     or other extensions of credit by, or any other acquisition of funds by, any
     office of such Lender that is not otherwise  included in the  determination
     of the Eurodollar Rate hereunder; or

                (iii) shall impose on such Lender any other condition;

and the result of any of the  foregoing  is to increase the cost to such Lender,
by an amount that such Lender deems to be material, of making,  converting into,
continuing  or  maintaining  Eurodollar  Loans or  issuing or  participating  in
Letters of  Credit,  or to reduce any  amount  receivable  hereunder  in respect
thereof,  then, in any such case,  the Borrower  shall promptly pay such Lender,
upon its demand,  any additional amounts necessary to compensate such Lender for
such increased cost or reduced amount receivable. If any Lender becomes entitled
to claim any additional  amounts  pursuant to this paragraph,  it shall promptly
notify the Borrower  (with a copy to the  Administrative  Agent) of the event by
reason of which it has become so entitled.

                (b) If any Lender shall have  determined that the adoption of or
any  change in any  Requirement  of Law  regarding  capital  adequacy  or in the
interpretation  or  application  thereof  or  compliance  by such  Lender or any
corporation  controlling  such Lender with any  request or  directive  regarding
capital adequacy  (whether or not having the force of law) from any Governmental
Authority  made  subsequent to the date hereof shall have the effect of reducing
the  rate  of  return  on  such  Lender's  or such  corporation's  capital  as a
consequence of its obligations hereunder or under or in respect of any Letter of
Credit to a level  below that which such Lender or such  corporation  could have
achieved but for such adoption,  change or compliance (taking into consideration
such Lender's or such  corporation's  policies with respect to capital adequacy)
by an amount deemed by such Lender to be material, then from time to time, after
submission  by such Lender to the  Borrower  (with a copy to the  Administrative
Agent) of a written request therefor, the Borrower shall pay to such Lender such
additional  amount or amounts as will compensate such Lender or such corporation
for such reduction.

                (c) A certificate as to any additional  amounts payable pursuant
to this  Section  submitted  by any Lender to the  Borrower  (with a copy to the
Administrative  Agent) shall be conclusive in the absence of manifest error. The
obligations  of  the  Borrower  pursuant  to  this  Section  shall  survive  the
termination  of this  Agreement and the payment of the  Revolving  Loans and all
other amounts payable hereunder.

          3.10. TAXES

                (a) All payments made by the Borrower under this Agreement shall
be made  free and clear of,  and  without  deduction  or  withholding  for or on
account of, any present or future income, stamp or other taxes, levies, imposts,
duties,  charges,  fees,  deductions or withholdings,  now or hereafter imposed,
levied, collected, withheld or assessed by any Governmental Authority, excluding
net income  taxes and  franchise  taxes  (imposed  in lieu of net income  taxes)
imposed on any Agent or any Lender as a result of a present or former connection
between  such Agent or such  Lender  and the  jurisdiction  of the  Governmental
Authority  imposing such tax or any political  subdivision  or taxing  authority
thereof or therein  (other  than any such  connection  arising  solely from such
Agent or such Lender having executed,  delivered or performed its obligations or
received  a payment  under,  or  enforced,  this  Agreement  or any  other  Loan
Document).  If any such non-excluded taxes, levies,  imposts,  duties,  charges,
fees,  deductions  or  withholdings  ("NON-EXCLUDED  TAXES") or Other  Taxes are
required  to be  withheld  from any  amounts  payable to any Agent or any Lender
hereunder,  the  amounts  so  payable  to such  Agent  or such  Lender  shall be
increased to the extent  necessary to yield to such Agent or such Lender  (after
payment of all  Non-Excluded  Taxes and Other Taxes)  interest or any such other
amounts  payable  hereunder  at the rates or in the  amounts  specified  in this
Agreement,  provided,  however,  that the  Borrower  shall  not be  required  to
increase any such amounts payable to any Lender with respect to any Non-Excluded
Taxes (i) that are  attributable  to such  Lender's  failure to comply  with the
requirements  of  paragraph  (d) or (e) of this  Section or (ii) that are United
States  withholding  taxes imposed on amounts payable to such Lender at the time
such Lender  becomes a party to this  Agreement,  except to the extent that such
Lender's assignor (if any) was entitled,  at the time of assignment,  to receive
additional  amounts from the Borrower  with respect to such  Non-Excluded  Taxes
pursuant to this paragraph.

                                       35


                (b) In addition,  the Borrower  shall pay any Other Taxes to the
relevant Governmental Authority in accordance with applicable law.

                (c) Whenever any  Non-Excluded  Taxes or Other Taxes are payable
by the Borrower,  as promptly as possible  thereafter the Borrower shall send to
the Administrative  Agent for its own account or for the account of the relevant
Agent or Lender,  as the case may be, a certified  copy of an original  official
receipt received by the Borrower showing payment thereof.  If the Borrower fails
to pay any Non-Excluded  Taxes or Other Taxes when due to the appropriate taxing
authority or fails to remit to the Administrative Agent the required receipts or
other required documentary evidence, the Borrower shall indemnify the Agents and
the Lenders for any  incremental  taxes,  interest or penalties  that may become
payable by any Agent or any Lender as a result of any such failure.

                (d) Each Lender (or Transferee)  that is not a "U.S.  Person" as
defined in Section  7701(a)(30) of the Code (a "NON-U.S.  LENDER") shall deliver
to the Borrower and the Administrative  Agent (or, in the case of a Participant,
to the Lender from which the related  participation  shall have been  purchased)
two copies of either U.S.  Internal Revenue Service Form W-8BEN or Form W-89ECI,
or, in the case of a  Non-U.S.  Lender  claiming  exemption  from  U.S.  federal
withholding  tax under  Section  871(h) or  881(c) of the Code with  respect  to
payments  of  "portfolio  interest",  a statement  substantially  in the form of
Exhibit G and a Form W-8BEN,  or any subsequent  versions  thereof or successors
thereto,  properly completed and duly executed by such Non-U.S.  Lender claiming
complete  exemption from, or a reduced rate of, U.S. federal  withholding tax on
all payments by the Borrower under this Agreement and the other Loan  Documents.
Such forms shall be delivered by each  Non-U.S.  Lender on or before the date it
becomes a party to this  Agreement  (or, in the case of any  Participant,  on or
before  the date such  Participant  purchases  the  related  participation).  In
addition,  each  Non-U.S.  Lender  shall  deliver such forms  promptly  upon the
obsolescence  or  invalidity of any form  previously  delivered by such Non-U.S.
Lender.  Each Non-U.S.  Lender shall promptly notify the Borrower at any time it
determines  that  it is no  longer  in a  position  to  provide  any  previously
delivered  certificate  to the  Borrower  (or any  other  form of  certification
adopted by the U.S. taxing  authorities for such purpose).  Notwithstanding  any
other  provision of this paragraph,  a Non-U.S.  Lender shall not be required to
deliver any form pursuant to this  paragraph  that such  Non-U.S.  Lender is not
legally able to deliver.

                (e) A Lender that is entitled to an exemption  from or reduction
of  non-U.S.  withholding  tax  under the law of the  jurisdiction  in which the
Borrower is located,  or any treaty to which such  jurisdiction is a party, with
respect to payments under this  Agreement  shall deliver to the Borrower (with a
copy to the Administrative Agent), at the time or times prescribed by applicable
law or  reasonably  requested  by the  Borrower,  such  properly  completed  and
executed documentation prescribed by applicable law as will permit such payments
to be made without  withholding or at a reduced rate,  PROVIDED that such Lender
is legally entitled to complete,  execute and deliver such  documentation and in
such  Lender's  judgment  such  completion,  execution or  submission  would not
materially prejudice the legal position of such Lender.

                (f) The agreements in this Section shall survive the termination
of this  Agreement and the payment of the Revolving  Loans and all other amounts
payable hereunder.

                                       36


          3.11. INDEMNITY.  The Borrower agrees to indemnify each Lender and the
Administrative  Agent  and to hold  each  Lender  and the  Administrative  Agent
harmless  from any loss or expense  that such  Lender may  sustain or incur as a
consequence of (a) default by the Borrower in making a borrowing of,  conversion
into or continuation  of Eurodollar  Loans after the Borrower has given a notice
requesting  the same in accordance  with the provisions of this  Agreement,  (b)
default  by  the  Borrower  in  making  any  prepayment  of or  conversion  from
Eurodollar  Loans after the  Borrower has given a notice  thereof in  accordance
with the  provisions  of this  Agreement  or (c) the making of a  prepayment  of
Eurodollar  Loans on a day that is not the last day of an  Interest  Period with
respect thereto. Such indemnification may include an amount equal to the excess,
if any, of (i) the amount of interest  that would have  accrued on the amount so
prepaid,  or not so borrowed,  converted or  continued,  for the period from the
date of such prepayment or of such failure to borrow, convert or continue to the
last day of such  Interest  Period  (or,  in the case of a  failure  to  borrow,
convert or continue,  the Interest  Period that would have commenced on the date
of such  failure)  in each  case at the  applicable  rate of  interest  for such
Eurodollar Loans provided for herein (excluding,  however, the Applicable Margin
included  therein,  if any) OVER  (ii) the  amount of  interest  (as  reasonably
determined by such Lender) that would have accrued to such Lender on such amount
by placing such amount on deposit for a comparable  period with leading banks in
the  interbank  eurodollar  market.  A  certificate  as to any  amounts  payable
pursuant  to this  Section  submitted  to the  Borrower  by any Lender  shall be
conclusive in the absence of manifest  error.  This  covenant  shall survive the
termination  of this  Agreement and the payment of the  Revolving  Loans and all
other amounts payable hereunder.

          3.12. CHANGE OF LENDING  OFFICE.  Each  Lender  agrees that,  upon the
occurrence  of any event giving rise to the  operation of SECTION 3.9 or 3.10(A)
with  respect  to such  Lender,  it will,  if  requested  by the  Borrower,  use
reasonable efforts (subject to overall policy  considerations of such Lender) to
designate  another lending office for any Revolving Loans affected by such event
with the object of avoiding the consequences of such event; PROVIDED,  that such
designation  is made on terms that, in the sole  judgment of such Lender,  cause
such Lender and its lending office(s) to suffer no economic, legal or regulatory
disadvantage,  and PROVIDED,  FURTHER, that nothing in this Section shall affect
or postpone any of the  obligations  of the Borrower or the rights of any Lender
pursuant to SECTION 3.9 or 3.10(A).

          3.13. REPLACEMENT  OF LENDERS.  The  Borrower  shall  be  permitted to
replace any Lender that (a) requests reimbursement for amounts owing pursuant to
SECTION 3.9 or 3.10(A) or (B) defaults in its obligation to make Revolving Loans
hereunder,  with a  replacement  financial  institution;  PROVIDED that (i) such
replacement  does not conflict  with any  Requirement  of Law,  (ii) no Event of
Default shall have  occurred and be continuing at the time of such  replacement,
(iii)  prior to any such  replacement,  such  Lender  shall have taken no action
under SECTION 3.12 so as to eliminate the continued  need for payment of amounts
owing  pursuant  to  SECTION  3.9 or  3.10(A),  (iv) the  replacement  financial
institution shall purchase,  at par, all Revolving Loans and other amounts owing
to such replaced Lender on or prior to the date of replacement, (v) the Borrower
shall be liable to such  replaced  Lender under  SECTION 3.11 if any  Eurodollar
Loan owing to such replaced Lender shall be purchased other than on the last day
of  the  Interest  Period  relating  thereto,  (vi)  the  replacement  financial
institution,  if not already a Lender,  shall be reasonably  satisfactory to the
Administrative  Agent, (vii) the replaced Lender shall be obligated to make such
replacement in accordance with the provisions of SECTION 10.6 (provided that the
Borrower shall be obligated to pay the  registration and processing fee referred
to therein),  (viii) until such time as such  replacement  shall be consummated,
the Borrower  shall pay all  additional  amounts (if any)  required  pursuant to
SECTION 3.9 or 3.10(A),  as the case may be, and (ix) any such replacement shall
not be deemed to be a waiver of any rights that the Borrower, the Administrative
Agent or any other Lender shall have against the replaced Lender.

                                       37


          3.14. EVIDENCE OF DEBT

                (a) Each  Lender  shall  maintain in  accordance  with its usual
practice an account or accounts evidencing  indebtedness of the Borrower to such
Lender  resulting  from each  Revolving  Loan of such  Lender from time to time,
including the amounts of principal and interest  payable and paid to such Lender
from time to time under this Agreement.

                (b) The Administrative  Agent, on behalf of the Borrower,  shall
maintain the Register pursuant to SECTION 10.6(C),  and a subaccount therein for
each Lender,  in which shall be recorded (i) the amount of each  Revolving  Loan
made hereunder and any Note  evidencing  such  Revolving  Loan, the Type of such
Revolving Loan and each Interest Period applicable  thereto,  (ii) the amount of
any  principal or interest due and payable or to become due and payable from the
Borrower to each Lender  hereunder and (iii) both the amount of any sum received
by the Administrative  Agent hereunder from the Borrower and each Lender's share
thereof.

                (c) The entries  made in the  Register  and the accounts of each
Lender maintained  pursuant to SECTION 3.14(A) shall, to the extent permitted by
applicable  law, be PRIMA FACIE  evidence  of the  existence  and amounts of the
obligations  of the  Borrower  therein  recorded;  PROVIDED,  HOWEVER,  that the
failure of any Lender or the  Administrative  Agent to maintain  the Register or
any such  account,  or any error  therein,  shall not in any  manner  affect the
obligation  of the Borrower to repay (with  applicable  interest)  the Revolving
Loans made to the Borrower by such Lender in  accordance  with the terms of this
Agreement.

                (d)  The  Borrower   agrees  that,   upon  the  request  to  the
Administrative  Agent by any Lender,  the  Borrower  will execute and deliver to
such Lender a promissory  note of the Borrower  evidencing any Revolving Loan of
such Lender, substantially in the form of EXHIBIT H, with appropriate insertions
as to date and principal amount.

          3.15. ILLEGALITY.  Notwithstanding any  other provision herein, if the
adoption of or any change in any Requirement of Law or in the  interpretation or
application  thereof  shall make it unlawful  for any Lender to make or maintain
Eurodollar  Loans as contemplated by this Agreement,  (a) the commitment of such
Lender hereunder to make Eurodollar Loans, continue Eurodollar Loans as such and
convert Base Rate Loans to Eurodollar  Loans shall forthwith be canceled and (b)
such Lender's  Revolving  Loans then  outstanding as Eurodollar  Loans,  if any,
shall be converted  automatically to Base Rate Loans on the respective last days
of the then current  Interest  Periods with respect to such  Revolving  Loans or
within such  earlier  period as required  by law.  If any such  conversion  of a
Eurodollar  Loan  occurs on a day which is not the last day of the then  current
Interest Period with respect thereto, the Borrower shall pay to such Lender such
amounts, if any, as may be required pursuant to SECTION 3.11.

          3.16. SHARING  OF  PAYMENTS  BY  LENDERS.  If any  Lender  shall,  by
exercising any right of setoff or counterclaim  or otherwise,  obtain payment in
respect of any  principal of or interest on any of the  Revolving  Loans made by
it,  or the  participations  in L/C  Obligations  held by it  resulting  in such
Lender's  receiving  payment of a  proportion  of the  aggregate  amount of such
Committed Loans or participations  and accrued interest thereon greater than its
PRO RATA share  thereof as  provided  herein,  then the  Lender  receiving  such
greater proportion shall (a) notify the  Administrative  Agent of such fact, and
(b) purchase (for cash at face value)  participations in the Revolving Loans and
subparticipations  in L/C  Obligations of the other Lenders,  or make such other
adjustments  as shall be  equitable,  so that the  benefit of all such  payments
shall be shared by the Lenders ratably in accordance  with the aggregate  amount
of principal of and accrued  interest on their  respective  Revolving  Loans and
other amounts owing them, PROVIDED that:

             (a) if any such participations or  subparticipations  are purchased
and all or any portion of the payment  giving rise  thereto is  recovered,  such
participations  or  subparticipations  shall be rescinded and the purchase price
restored to the extent of such recovery, without interest; and

             (b) the  provisions of this Section shall not be construed to apply
to (x) any payment made by the Borrower  pursuant to and in accordance  with the
express  terms of this  Agreement  or (y) any  payment  obtained  by a Lender as
consideration  for the  assignment of or sale of a  participation  in any of its
Revolving  Loans or  subparticipations  in L/C  Obligations  to any  assignee or
participant,  other than to the Borrower or any Subsidiary  thereof (as to which
the provisions of this Section shall apply).

                                       38


Each Loan Party  consents  to the  foregoing  and  agrees,  to the extent it may
effectively  do  so  under   applicable   law,  that  any  Lender   acquiring  a
participation  pursuant to the foregoing  arrangements may exercise against such
Loan Party rights of setoff and counterclaim with respect to such  participation
as fully as if such  Lender  were a direct  creditor  of such Loan  Party in the
amount of such participation.

                   SECTION 4. REPRESENTATIONS AND WARRANTIES

         To induce the Agents and the Lenders to enter into this  Agreement  and
to make the Revolving  Loans and issue or  participate in the Letters of Credit,
the Company and the Borrower hereby jointly and severally  represent and warrant
to each Agent and each Lender that:

          4.1.  FINANCIAL  CONDITION.  The audited  consolidated balance sheets
of the Company as at December 31, 2001, December 31, 2002 and December 31, 2003,
and the related consolidated  statements of operations and of cash flows for the
fiscal  years  ended  on  such  dates,  reported  on by  and  accompanied  by an
unqualified report from PricewaterhouseCoopers,  present fairly the consolidated
financial  condition  of the  Company  as at such  dates,  and their  respective
consolidated   results  of  operations  and  consolidated  cash  flows  for  the
respective fiscal years then ended. All such financial statements, including the
related schedules and notes thereto,  have been prepared in accordance with GAAP
applied consistently  throughout the periods involved (except as approved by the
aforementioned firm of accountants and disclosed  therein).  Except as set forth
on  SCHEDULE  4.1,  no Group  Member  has any  material  Guarantee  Obligations,
contingent  liabilities or  liabilities  for taxes,  or any long-term  leases or
unusual forward or long-term commitments, including any interest rate or foreign
currency  swap or  exchange  transaction  or  other  obligation  in  respect  of
derivatives,  that are not  reflected  in the most recent  financial  statements
referred to in this paragraph. During the period from September 30, 2004, to and
including  the date hereof there has been no  Disposition  by the Company of any
material part of its business or property.

          4.2.  NO CHANGE; NO INTERNAL CONTROL EVENT. Since September 30, 2004,
there has been (i) no development  or event that has had or could  reasonably be
expected to have a Material Adverse Effect and (ii) no Internal Control Event.

          4.3.  EXISTENCE;  COMPLIANCE  WITH LAW.  Each Group Member (a) is duly
organized,  validly  existing  and  in  good  standing  under  the  laws  of the
jurisdiction of its organization, (b) has the power and authority, and the legal
right,  to own and operate its  property,  to lease the  property it operates as
lessee and to conduct the business in which it is currently engaged, (c) is duly
qualified as a foreign corporation, partnership or limited liability company and
in good standing under the laws of each jurisdiction where its ownership,  lease
or  operation  of  property  or  the  conduct  of  its  business  requires  such
qualification  and (d) is in compliance  with all  Requirements of Law except to
the extent that the  failure to comply  therewith  could not, in the  aggregate,
reasonably be expected to have a Material Adverse Effect.

          4.4.  POWER;  AUTHORIZATION;  ENFORCEABLE OBLIGATIONS. Each Loan Party
has the power and authority,  and the legal right, to make,  deliver and perform
the Loan  Documents to which it is a party and, in the case of the Borrower,  to
obtain extensions of credit  hereunder.  Each Loan Party has taken all necessary
organizational  action to authorize the execution,  delivery and  performance of
the Loan  Documents to which it is a party and, in the case of the Borrower,  to
authorize  the  extensions  of  credit  on the  terms  and  conditions  of  this
Agreement.  No consent or authorization  of, filing with, notice to or other act
by or in respect of, any Governmental  Authority or any other Person is required
in connection with the  transactions  contemplated  hereby and the extensions of
credit  hereunder  or with the  execution,  delivery,  performance,  validity or
enforceability  of this  Agreement  or any of the  Loan  Documents,  except  (i)
consents,  authorizations,  filings and notices described in SCHEDULE 4.4, which
consents, authorizations, filings and notices have been obtained or made and are
in full force and effect and (ii) the filings  referred to in SECTION 4.19. Each
Loan  Document has been duly executed and delivered on behalf of each Loan Party
thereto. This Agreement constitutes, and each other Loan Document upon execution
will  constitute,  a legal,  valid and  binding  obligation  of each Loan  Party
thereto,  enforceable against each such Loan Party in accordance with its terms,
except as enforceability  may be limited by applicable  bankruptcy,  insolvency,
reorganization,   moratorium  or  similar  laws  affecting  the  enforcement  of
creditors'  rights  generally  and  by  general  equitable  principles  (whether
enforcement is sought by proceedings in equity or at law).

                                       39


          4.5.  NO LEGAL BAR. The  execution, delivery and  performance  of this
Agreement and the other Loan Documents,  the issuance of Letters of Credit,  the
borrowings  hereunder  and the use of the proceeds  thereof will not violate any
Requirement of Law or any Contractual Obligation of the Company, the Borrower or
any of their  respective  Subsidiaries  and will not result in, or require,  the
creation or  imposition  of any Lien on any of their  respective  properties  or
revenues  pursuant to any Requirement of Law or any such Contractual  Obligation
(other than the Liens created by the Security Documents).  No Requirement of Law
or  Contractual  Obligation  applicable  to the Company,  the Borrower or any of
their  respective  Subsidiaries  could reasonably be expected to have a Material
Adverse Effect.

          4.6.  LITIGATION.  No  litigation,  investigation  or proceeding of or
before any arbitrator or Governmental  Authority is pending or, to the knowledge
of the  Company or the  Borrower,  threatened  by or against  the  Company,  the
Borrower  or any of  their  respective  Subsidiaries  or  against  any of  their
respective  properties or revenues (a) with respect to any of the Loan Documents
or any of the transactions contemplated hereby or thereby or (b) that, except as
set forth on  SCHEDULE  4.6,  could  reasonably  be  expected to have a Material
Adverse Effect.

          4.7.  NO DEFAULT. Neither the  Company,  the Borrower nor any of their
respective  Subsidiaries  is in  default  under  or with  respect  to any of its
Contractual Obligations in any respect that could reasonably be expected to have
a Material  Adverse  Effect.  No Default or Event of Default has occurred and is
continuing.

          4.8.  OWNERSHIP  OF  PROPERTY;  LIENS.  Each Group Member has good and
defensible title to all of its material properties and assets, free and clear of
all Liens other than Liens permitted under SECTION 7.3 and of all impediments to
the use of such  properties and assets in such Group Member's  business,  except
that no  representation  or  warranty  is made with  respect to any oil,  gas or
mineral property or interest to which no proved oil or gas reserves are properly
attributed. Except for Liens permitted under SECTION 7.3, each Group Member will
respectively own in the aggregate,  in all material respects,  the net interests
in production  attributable  to all material  wells and units owned by the Group
Members.  The  ownership of such  properties  shall not in the  aggregate in any
material  respect  obligate  such  Group  Member to bear the costs and  expenses
relating to the maintenance, development and operations of such properties in an
amount  materially in excess of the working  interest of such  properties.  Each
Group  Member  has paid all  royalties  payable  under the oil and gas leases to
which it is operator, except those contested in accordance with the terms of the
applicable  joint  operating  agreement or otherwise  contested in good faith by
appropriate  proceedings  and with respect to which reserves in conformity  with
GAAP have  been  provided  on the  books of the  Company,  the  Borrower  or its
Subsidiaries, as the case may be.

          4.9.  INTELLECTUAL PROPERTY.  The  Company,  the  Borrower and each of
their  respective  Subsidiaries  owns,  or is licensed to use, all  Intellectual
Property  necessary for the conduct of its business as currently  conducted.  No
material  claim has been  asserted and is pending by any Person  challenging  or
questioning   the  use  of  any   Intellectual   Property  or  the  validity  or
effectiveness of any Intellectual Property, nor does the Company or the Borrower
know of any valid basis for any such claim. The use of Intellectual  Property by
the Company, the Borrower and their respective Subsidiaries does not infringe on
the rights of any Person in any material respect.

          4.10. TAXES.  Each of the  Company,  the  Borrower  and each of their
respective  Subsidiaries has filed or caused to be filed all Federal,  state and
other  material tax returns that are required to be filed and has paid all taxes
shown to be due and payable on said returns or on any  assessments  made against
it or any of its property and all other taxes,  fees or other charges imposed on
it or any of its  property  by any  Governmental  Authority  (other than any the
amount or  validity  of which are  currently  being  contested  in good faith by
appropriate  proceedings  and with respect to which reserves in conformity  with
GAAP have  been  provided  on the  books of the  Company,  the  Borrower  or its
Subsidiaries,  as the case may be);  no tax  Lien has been  filed,  and,  to the
knowledge  of the Company and the  Borrower,  no claim is being  asserted,  with
respect to any such tax, fee or other charge.

          4.11. FEDERAL  REGULATIONS.  No part of the proceeds of any Revolving
Loans, and no other extensions of credit hereunder, will be used for "buying" or
"carrying"  any "margin  stock"  within the  respective  meanings of each of the
quoted terms under Regulation U as now and from time to time hereafter in effect
or for any purpose that violates the provisions of the Regulations of the Board.
If  requested  by any Lender or the  Administrative  Agent,  the  Borrower  will
furnish to the Administrative Agent and each Lender a statement to the foregoing
effect in  conformity  with the  requirements  of FR Form G-3 or FR Form U-1, as
applicable, referred to in Regulation U.


                                       40


          4.12. LABOR MATTERS. Except as, in the aggregate, could not reasonably
be expected to have a Material Adverse Effect: (a) there are no strikes or other
labor  disputes  against any Group  Member  pending or, to the  knowledge of the
Company or the  Borrower,  threatened;  (b) hours  worked by and payment made to
employees  of each Group  Member  have not been in  violation  of the Fair Labor
Standards  Act or any other  applicable  Requirement  of Law  dealing  with such
matters;  and (c) all  payments due from any Group Member on account of employee
health and welfare  insurance  have been paid or accrued as a  liability  on the
books of the relevant Group Member.

          4.13. ERISA.  Neither a Reportable Event nor an "accumulated  funding
deficiency"  (within  the  meaning of Section  412 of the Code or Section 302 of
ERISA) has occurred during the five-year  period prior to the date on which this
representation  is made or deemed made with  respect to any Plan,  and each Plan
has complied in all material  respects with the  applicable  provisions of ERISA
and the Code. No termination of a Single Employer Plan has occurred, and no Lien
in favor of the PBGC or a Plan has arisen,  during such  five-year  period.  The
present value of all accrued  benefits under each Single Employer Plan (based on
those  assumptions  used to fund  such  Plans)  did not,  as of the last  annual
valuation date prior to the date on which this  representation is made or deemed
made,  exceed the value of the  assets of such Plan  allocable  to such  accrued
benefits by a material amount.  Neither the Company nor any Commonly  Controlled
Entity has had a complete or partial withdrawal from any Multiemployer Plan that
has resulted or could  reasonably be expected to result in a material  liability
under ERISA,  and neither the Company nor any Commonly  Controlled  Entity would
become subject to any material  liability under ERISA if the Company or any such
Commonly  Controlled  Entity were to withdraw  completely from all Multiemployer
Plans as of the  valuation  date most closely  preceding  the date on which this
representation  is  made  or  deemed  made.  No  such  Multiemployer  Plan is in
Reorganization or Insolvent.

          4.14. INVESTMENT COMPANY ACT; OTHER REGULATIONS.  No Loan Party is an
"investment  company",  or a company  "controlled"  by an "investment  company",
within the meaning of the  Investment  Company Act of 1940, as amended.  No Loan
Party is  subject  to  regulation  under  any  Requirement  of Law  (other  than
Regulation X of the Board) that limits its ability to incur Indebtedness.

          4.15. SUBSIDIARIES.  Except  as  disclosed  to the  Co-Administrative
Agents by the Borrower in writing from time to time after the Closing Date,  (a)
SCHEDULE  4.15(A)  sets  forth  the  name  and  jurisdiction  of  incorporation,
organization or formation of each  Subsidiary  and, as to each such  Subsidiary,
the  percentage  of each class of Capital  Stock owned by any Loan Party and (b)
except as set forth on SCHEDULE 4.15(B), there are no outstanding subscriptions,
options,  warrants, calls, rights or other agreements or commitments (other than
stock  options  granted to  employees  or directors  and  directors'  qualifying
shares)  of any  nature  relating  to any  Capital  Stock of the  Company or any
Subsidiary.

          4.16. USE OF PROCEEDS.  The proceeds of the Revolving  Loans shall be
used for general  corporate  purposes of the  Company,  the  Borrower  and their
Subsidiaries.  The  Letters of Credit  shall be used for the  general  corporate
purposes of the Company, the Borrower and the Company's Subsidiaries.

                                       41


          4.17. ENVIRONMENTAL MATTERS

                (a) The facilities and properties  owned,  leased or operated by
any Group  Member (the  "Properties")  do not contain,  and have not  previously
contained,  any Materials of Environmental  Concern in amounts or concentrations
or under  circumstances  that constitute or constituted a violation of, or could
give rise to material liability under, any Environmental Law.

                (b) No Group  Member has  received  or is aware of any notice of
violation, alleged violation,  non-compliance,  liability or potential liability
regarding  environmental  matters or  compliance  with  Environmental  Laws with
regard to any of the  Properties  or the  business  operated by any Group Member
(the "BUSINESS"),  nor does the Company or the Borrower have knowledge or reason
to believe that any such notice will be received or is being threatened.

                (c) Materials of Environmental Concern have not been transported
or  disposed  of from the  Properties  in  violation  of, or in a manner or to a
location that could give rise to liability  under,  any  Environmental  Law, nor
have any Materials of Environmental Concern been generated,  treated,  stored or
disposed  of at,  on or under any of the  Properties  in  violation  of, or in a
manner that could give rise to liability  under,  any  applicable  Environmental
Law.

                (d)  Except  as set  forth  on  SCHEDULE  4.17(D),  no  judicial
proceeding  or  governmental  or  administrative  action is  pending  or, to the
knowledge of the Company and the Borrower,  threatened,  under any Environmental
Law to which any Group Member is or will be named as a party with respect to the
Properties or the Business,  nor are there any consent decrees or other decrees,
consent orders,  administrative  orders or other orders, or other administrative
or judicial requirements outstanding under any Environmental Law with respect to
the Properties or the Business.

                (e) There has been no release or threat of release of  Materials
of Environmental  Concern at or from the Properties,  or arising from or related
to the  operations  of any Group Member in  connection  with the  Properties  or
otherwise in connection with the Business, in violation of or in amounts or in a
manner that could give rise to material liability under Environmental Laws.

                (f) Except as set forth on SCHEDULE 4.17(F),  the Properties and
all operations at the  Properties  are in compliance,  and have in the last five
years  been  in  compliance,  in  all  material  respects  with  all  applicable
Environmental  Laws,  and  there is no  contamination  at,  under  or about  the
Properties or violation of any  Environmental Law with respect to the Properties
or the Business.

                (g) No Group  Member  has  assumed  any  liability  of any other
Person  under  Environmental  Laws,  other  than  as a  result  of a  merger  or
consolidation  of such Person into a Group Member or in connection with an asset
acquisition,  and then only with  respect to the acquired  assets,  in each case
where the  transaction  did not result in the  assumption of any known  material
liabilities.

          4.18. ACCURACY OF  INFORMATION,  ETC..  No statement  or  information
contained  in this  Agreement,  any other Loan  Document or any other  document,
certificate  or  statement  furnished  by or on behalf of any Loan  Party to the
Co-Administrative  Agents or the Lenders,  or any of them, for use in connection
with  the  transactions  contemplated  by  this  Agreement  or  the  other  Loan
Documents,  contained as of the date such  statement,  information,  document or
certificate was so furnished, any untrue statement of a material fact or omitted
to state a material fact  necessary to make the statements  contained  herein or
therein not misleading.  The  projections  and PRO FORMA  financial  information
contained in the materials  referenced above are based upon good faith estimates
and  assumptions  believed by  management of the Company to be reasonable at the
time made, it being recognized by the Lenders that such financial information as
it relates to future events is not to be viewed as fact and that actual  results
during the period or periods  covered by such financial  information  may differ
from the projected  results set forth therein by a material amount.  There is no
fact  known to any Loan  Party  that  could  reasonably  be  expected  to have a
Material  Adverse Effect that has not been expressly  disclosed  herein,  in the
other Loan  Documents or in any other  documents,  certificates  and  statements
furnished to the Co-Administrative  Agents and the Lenders for use in connection
with the transactions contemplated hereby and by the other Loan Documents.

                                       42


          4.19. SECURITY DOCUMENTS. Each of the Mortgages is effective to create
in favor of the  Administrative  Agent, for the benefit of the Lenders, a legal,
valid and enforceable  Lien on the Mortgaged  Properties  described  therein and
proceeds thereof, and when the Mortgages (or amendments to the relevant Existing
Mortgages as contemplated by SECTION 5.1(J)) are filed in the offices  specified
on SCHEDULE 4.19, each such Mortgage shall constitute a fully perfected Lien on,
and security  interest in, all right,  title and interest of the Loan Parties in
the  Mortgaged  Properties  and  the  proceeds  thereof,  as  security  for  the
Obligations  (as  defined  in the  relevant  Mortgage),  in each case  prior and
superior  in  right  to any  other  Person.  Each  of the  Mortgaged  Properties
qualifies as Proved Developed Properties.

          4.20.  SOLVENCY.  Each Loan Party is, and after  giving  effect to the
incurrence of all  Indebtedness  and  obligations  being  incurred in connection
herewith will be, and will continue to be, Solvent.

          4.21. SENIOR DEBT LIMIT. The aggregate amount of Revolving  Extensions
of Credit  outstanding at any time does not exceed the Senior Debt Limit at such
time.

          4.22. SUBSIDIARY  GUARANTORS.  Each "Restricted  Subsidiary" under the
Indentures is a Subsidiary Guarantor.

                        SECTION 5. CONDITIONS PRECEDENT

          5.1. CONDITIONS TO INITIAL EXTENSION OF CREDIT. The agreement of each
Lender to make the initial  extension  of credit  requested  to be made by it is
subject to the  satisfaction  of, among other things,  the following  conditions
precedent (the date upon which all such conditions precedent shall be satisfied,
the "CLOSING DATE").

                (a) CREDIT AGREEMENT; GUARANTEE AGREEMENT. The Co-Administrative
Agents shall have  received (i) this  Agreement  executed and  delivered by each
Agent, the Company and the Borrower and each Person listed on SCHEDULE 1.1A, and
(ii) the  Guarantee  Agreement,  executed and  delivered by the Company and each
Subsidiary Guarantor.

                (b)  APPROVALS.  All  governmental  and  third  party  approvals
necessary or, in the discretion of the  Co-Administrative  Agents,  advisable in
connection  with  the  transactions   contemplated  hereby  and  the  continuing
operations of the Company and its  subsidiaries  shall have been obtained and be
in full force and effect,  and all applicable waiting periods shall have expired
without any action being taken or threatened by any  competent  authority  which
would  restrain,   prevent  or  otherwise  impose  adverse   conditions  on  the
transactions contemplated hereby.

                (c) LIEN  SEARCHES.  The  Co-Administrative  Agents  shall  have
received the results of a recent lien search in the central  filing office (and,
to the  extent  requested  by the  Co-Administrative  Agents,  the local  filing
offices)  of each of the  jurisdictions  where  assets of the Loan  Parties  are
located,  and such search shall reveal no liens on any of the assets of the Loan
Parties  except for liens  permitted by SECTION 7.3 or discharged on or prior to
the Closing Date pursuant to documentation satisfactory to the Co-Administrative
Agents.

                                       43


                (d)  REPORTS;  OFFICER'S  CERTIFICATE.  The  Company  shall have
delivered to the  Co-Administrative  Agents,  prior to the Closing Date, (i) the
Initial  Engineering  Reports  and (ii) a  certificate  of the  chief  financial
officer or the  treasurer  of the  Company  certifying  (A) the  calculation  of
Adjusted Consolidated Net Tangible Assets as of September 30, 2004, (B) that the
liens  securing the  Collateral  are  permitted  under the  Indentures,  (C) the
calculation  of the Senior  Debt Limit as of  September  30,  2004,  and (D) the
calculation of the Collateral Value (based upon the Initial  Engineering Reports
and deducting the reserves  projected to be produced on or prior to the June 30,
2005 Evaluation Date), which certificate shall attach all reports and appraisals
used to make such calculations.

                (e) FEES.  The Lenders and the Agents  shall have  received  all
fees  required  to be paid,  and all  expenses  for  which  invoices  have  been
presented  (including the reasonable fees and expenses of legal counsel),  on or
before  the  Closing  Date.  All such  amounts  will be paid  with  proceeds  of
Revolving  Loans made on the Closing  Date and will be  reflected in the funding
instructions given by the Borrower to the Co-Administrative  Agents on or before
the Closing Date.

                (f) CLOSING CERTIFICATE. The Co-Administrative Agents shall have
received a certificate of each Loan Party, dated the Closing Date, substantially
in the form of EXHIBIT C, with appropriate insertions and attachments.

                (g) LEGAL  OPINIONS.  The  Co-Administrative  Agents  shall have
received the following executed legal opinions:

                (i) the legal opinion of Commercial Law Group,  P.C., counsel to
the Company and its Subsidiaries, substantially in the form of Exhibit F; and

                (ii) the legal  opinion  of  Thompson  & Knight  and such  other
special and local counsel as may be required by the Co-Administrative Agents.

Each  such  legal  opinion  shall  cover  such  other  matters  incident  to the
transactions  contemplated by this Agreement as the Co-Administrative Agents may
reasonably require.

                (h)  FILINGS,   REGISTRATIONS  AND  RECORDINGS.   Each  document
     (including any Uniform Commercial Code financing statement) required by the
     Security   Documents   or  under  law  or   reasonably   requested  by  the
     Co-Administrative  Agents to be filed,  registered  or recorded in order to
     create in favor of the  Co-Administrative  Agents,  for the  benefit of the
     Lenders, a perfected Lien on the Collateral  described  therein,  prior and
     superior in right to any other  Person  (other  than with  respect to Liens
     expressly  permitted by SECTION  7.3),  shall be in proper form for filing,
     registration or recordation.

                (i) MORTGAGES, ETC.

                (i) The  Administrative  Agent  shall  have  received a Mortgage
(together with any other documents  requested to be delivered  thereunder) to be
filed  in  each  county  in  which  the  Mortgaged  Properties  are  located  or
satisfactory  amendments to each Existing Mortgage,  executed and delivered by a
duly authorized officer of each party thereto. The aggregate Collateral Value of
such  Mortgaged  Properties  as of the Closing Date shall be sufficient to cause
the  Collateral  Coverage  Ratio to be at least 1.5 to 1.0 on the Closing  Date.
Upon receipt of the Mortgages, the Administrative Agent will be responsible for,
and arrange for, the recording thereof.

                (ii)   If   requested   by   the   Administrative   Agent,   the
Administrative  Agent shall have  received (A) copies of all material  contracts
relating  to the  Mortgaged  Properties  and (B)  copies of  satisfactory  legal
opinions as to title to the Mortgaged Properties  representing not more than 50%
of the Collateral Value.

                                       44


                (j)  SOLVENCY  CERTIFICATE.  Each  of  the  Lenders  shall  have
received and shall be satisfied  with a solvency  certificate  of a  Responsible
Officer of the Company which shall  document the solvency of the Company and its
subsidiaries after giving effect to the transactions contemplated hereby.

                (k) INSURANCE.  The Co-Administrative Agents shall have received
insurance certificates satisfying the requirements of this Agreement.

             5.2.  CONDITIONS TO EACH EXTENSION OF CREDIT. The agreement of each
Lender to make any  extension  of credit  requested to be made by it on any date
(including its initial  extension of credit) is subject to the  satisfaction  of
the following conditions precedent:

                (a) REPRESENTATIONS AND WARRANTIES.  Each of the representations
and warranties made by any Loan Party in or pursuant to the Loan Documents shall
be true and correct on and as of such date as if made on and as of such date.

                (b) NO  DEFAULT.  No  Default  or Event of  Default  shall  have
occurred and be continuing on such date or after giving effect to the extensions
of credit requested to be made on such date.

                (c) SENIOR DEBT LIMIT. The Total Revolving  Extensions of Credit
do not exceed the Senior Debt Limit after  giving  effect to the  extensions  of
credit requested to be made on such date.

Each  borrowing  by and issuance of a Letter of Credit on behalf of the Borrower
hereunder shall constitute a  representation  and warranty by the Borrower as of
the date of such  extension  of credit  that the  conditions  contained  in this
SECTION 5.2 have been satisfied.

                        SECTION 6. AFFIRMATIVE COVENANTS

         The Company and the Borrower  hereby jointly and severally  agree that,
so long as the  Revolving  Commitments  remain in  effect,  any Letter of Credit
remains outstanding or any Revolving Loan or other amount is owing to any Lender
or Agent  hereunder,  each of the Company and the Borrower shall and shall cause
each of its Subsidiaries to:

          6.1.  FINANCIAL STATEMENTS.  Furnish  to the Co-Administrative Agents
and each Lender:

                (a) as soon as available,  but in any event within 95 days after
the end of each fiscal year of the Company  beginning with the fiscal year ended
December 31, 2004, (i) a copy of the audited  consolidated  balance sheet of the
Company  and its  consolidated  Subsidiaries  as at the end of such year and the
related  audited  consolidated  statements of operations and cash flows for such
year,  setting  forth  in each  case in  comparative  form the  figures  for the
previous year,  reported on without a "going concern" or like  qualification  or
exception,  or  qualification  arising  out of the  scope  of  the  audit,  by a
Registered  Public Accounting Firm selected by the Company and acceptable to the
Co-Administrative  Agents,  (ii) to the extent that there are any  "Unrestricted
Subsidiaries"  under the  Indentures  at such  fiscal  year end,  the  unaudited
consolidating balance sheets of the Company and its consolidated Subsidiaries as
at  the  end of  such  fiscal  year  and  the  related  unaudited  consolidating
statements of operations and cash flows for such year setting forth in each case
in comparative form the figures for the previous year certified by a Responsible
Officer  as  being  fairly  stated  in  all  material  respects,  and  (iii)  an
attestation report of such Registered Public Accounting Firm as to the Company's
internal controls pursuant to Section 404 of Sarbanes-Oxley; and

                (b) as soon as  available,  but in any event  not later  than 50
days after the end of each of the first three  quarterly  periods of each fiscal
year of the Company, the unaudited consolidated and, to the extent there are any
"Unrestricted  Subsidiaries"  under  the  Indentures  at such  fiscal  year end,
consolidating balance sheet of the Company and its consolidated  Subsidiaries as
at the end of such  quarter and the related  unaudited  consolidated  and to the
extent there are any  "Unrestricted  Subsidiaries"  under the Indentures at such
fiscal year end, consolidating  statements of operations and cash flows for such
quarter  and the portion of the fiscal  year  through  the end of such  quarter,
setting  forth in each case in  comparative  form the figures  for the  previous
year,  certified by a Responsible Officer as being fairly stated in all material
respects (subject to normal year-end audit adjustments).

All such  financial  statements  shall be complete  and correct in all  material
respects and shall be prepared in reasonable  detail and in accordance with GAAP
applied  consistently  throughout the periods  reflected  therein and with prior
periods (except as approved by such accountants or officer,  as the case may be,
and disclosed therein) and applicable Securities Laws.

                                       45

          6.2.  CERTIFICATES;    OTHER   INFORMATION.    Furnish   to   the Co-
Administrative  Agents who will  forward to each  Lender  (or, in the case of
clause (f), to the relevant Lender):

                (a) concurrently  with the delivery of the financial  statements
referred to in SECTION 6.1(A), a certificate of the independent certified public
accountants  reporting on such financial  statements  stating that in making the
examination  necessary  therefore  no  knowledge  was obtained of any Default or
Event of Default, except as specified in such certificate;

                (b) concurrently  with the delivery of any financial  statements
pursuant to SECTION  6.1,  (i) a  certificate  of a  Responsible  Officer of the
Company and the Borrower stating that, to the best of such Responsible Officer's
knowledge,  each Loan Party during such period has observed or performed  all of
its covenants and other agreements, and satisfied every condition,  contained in
this  Agreement  and the  other  Loan  Documents  to  which  it is a party to be
observed,  performed or satisfied by it, and that such  Responsible  Officer has
obtained no knowledge of any Default or Event of Default  except as specified in
such  certificate  and  (ii)  in the  case  of  quarterly  or  annual  financial
statements,   a  Compliance  Certificate  (A)  containing  all  information  and
calculations  necessary for determining compliance by each Group Member with the
provisions  of this  Agreement  (including,  without  limitation,  SECTION  7.1)
referred  to therein as of the last day of the fiscal  quarter or fiscal year of
the  Company,  as the case may be,  and,  if  applicable,  for  determining  the
Applicable  Margins and Commitment  Fee Rate, (B) certifying the  calculation of
the Senior Debt Limit as of the last day of the fiscal quarter or fiscal year of
the Company, as the case may be, and (C) certifying the value of the oil and gas
properties  of the  Company  and its  Subsidiaries  over  which a Lien  has been
created  pursuant to SECTION  7.3(J) and such  certificate  shall set forth such
calculation based on the applicable  Engineering  Reports delivered  pursuant to
SECTION  6.2(E) and the  average of the  applicable  price  assumptions  and the
current  risk   adjusted   values  for  Other  Proved   Reserves   used  by  the
Co-Administrative  Agents in the most  recent  determination  of the  Collateral
Value pursuant to SECTION 2.14;

             (c)  concurrently  with the  delivery of any  financial  statements
pursuant to SECTION 6.1, a detailed consolidated budget for the following fiscal
year  (including a projected  consolidated  balance sheet of the Company and its
Subsidiaries  as  of  the  end  of  the  following   fiscal  year,  the  related
consolidated  statements of projected cash flow,  projected changes in financial
position  and  projected   income)(collectively,   the   "Projections"),   which
Projections  shall in each case be accompanied by a certificate of a Responsible
Officer  stating  that  such  Projections  are  based on  reasonable  estimates,
information and assumptions and that such  Responsible  Officer has no reason to
believe  that such  Projections  are  incorrect  or  misleading  in any material
respect;

             (d) within (i) 120 days following each Evaluation Date occurring on
December 31 and (ii) 75 days following each other  Evaluation  Date, one or more
engineering  reports,  prepared by the  Company's  engineers  and certified by a
Responsible  Officer  as to the  accuracy  and  completeness  thereof  (each,  a
"COMPANY  REPORT") or, in the case of each Evaluation Date occurring on December
31,  prepared  with  respect to not less than 70% of the  reserve  volume of the
Company and its Subsidiaries (but in any event, not less than 90% of the reserve
volume used in the  determination  of the Collateral  Value with respect to such
Evaluation  Date) by independent  petroleum  engineers chosen by the Company and
acceptable to the Majority Lenders (each such report,  an "INDEPENDENT  REPORT",
the Independent Reports  collectively with the Company Reports, the "ENGINEERING
REPORTS")  together  with all  other  information,  reports  and data  which the
Co-Administrative Agents have requested in connection therewith, which shall set
forth  for  each  oil  and gas  property  or  interest  of the  Company  and its
Subsidiaries  the separate  categories of Proved Developed  Producing  reserves,
Proved Developed Non Producing reserves,  Proved Developed Behind Pipe reserves,
Proved Developed Shut-in reserves,  and Proved Undeveloped reserves attributable
to such  properties  together with a projection  of the rate of production  with
respect  thereto as of the date that is (A) with respect to any Evaluation  Date
that is December 31 and June 30, such  Evaluation  Date and (B) with  respect to
any  other  Evaluation  Date,  the last day of the  fiscal  quarter  immediately
preceding such Evaluation Date for which the Engineering Reports so required may
be reasonably  prepared,  which report(s),  in any case,  shall  distinguish (or
shall be delivered  together with a certificate  from an appropriate  officer of

                                       46


the Borrower which  distinguishes)  those properties treated in the report which
are  Collateral,  from those  properties  treated  in the  report  which are not
Collateral.   Each   Engineering   Report   shall   be   satisfactory   to   the
Co-Administrative  Agents and, without limitation,  shall (i) contain sufficient
information to enable the Borrower to meet the reporting requirements concerning
oil and gas reserves contained in Regulations S-K and S-X promulgated by the SEC
and to ascertain projected future production  attributable to the portion of the
reserves  of  the  Mortgaged  Properties  categorized  as  "Producing",  "Proved
Developed Producing", "Proved Developed Non Producing", "Proved Developed Behind
Pipe",  "Proved Developed  Shut-in",  other "Proved Developed Non Producing" and
"Proved  Undeveloped",  (ii) take into account any "over-produced"  status under
gas  balancing   arrangements,   and  (iii)  contain  information  and  analysis
comparable  in scope  to that  contained  in the  Initial  Engineering  Reports.
Accompanying  each  Engineering  Report,  the  Borrower  shall  deliver a report
reflecting  the  occurrence of the  following  events since the date of the most
recent  Engineering  Report:  (i) all property sales and pending  property sales
identifying  the property and sale price therefor,  (ii) all property  purchases
and pending  property  purchases  (unless such disclosure will in the reasonable
judgment  of  counsel  to the  Borrower  violate  a  confidentiality  agreement)
identifying the property and the purchase price  therefor,  and (iii) changes in
the categories of proved developed and proved undeveloped reserves  attributable
to each oil and gas property or interest of the Company and its Subsidiaries;

                (e)   concurrently   with  the   delivery  of  the  budgets  and
projections  referred  to in  SECTION  6.2(C),  a  report  of the  Budget  Basis
Projected  Production  on a month by month basis for each of the next 36 months,
together with such supporting  detail as  Co-Administrative  Agents may request,
which report shall in each case be accompanied by a certificate of a Responsible
Officer  stating  that  such  Budget  Basis  Projected  Production  is  based on
reasonable  estimates,  information and  assumptions  and that such  Responsible
Officer has no reason to believe that such Budget Basis Projected  Production is
incorrect or misleading in any material respect; and

                (f) promptly, such additional financial and other information as
any Lender may from time to time reasonably request.

The Company and the Borrower hereby  acknowledge that (a) the  Co-Administrative
Agents will make  available  to the Lenders  and the  Issuing  Lender  materials
and/or  information  provided by or on behalf of the  Company  and the  Borrower
hereunder (collectively, "BORROWER MATERIALS") by posting the Borrower Materials
on IntraLinks or another  similar  electronic  system (the  "PLATFORM")  and (b)
certain of the Lenders may be "public-side"  Lenders (i.e.,  Lenders that do not
wish to receive material non-public  information with respect to the Borrower or
its securities)  (each, a "PUBLIC LENDER").  The Company and the Borrower hereby
agree  that so long as the  Company  is the  issuer of any  outstanding  debt or
equity  securities that are registered or issued pursuant to a private  offering
or is  actively  contemplating  issuing  any such  securities  (w) all  Borrower
Materials  that are to be made  available to Public Lenders shall be clearly and
conspicuously  marked  "PUBLIC"  which,  at a minimum,  shall mean that the word
"PUBLIC"  shall appear  prominently  on the first page  thereof;  (x) by marking
Borrower  Materials  "PUBLIC,"  the Company and the Borrower  shall be deemed to
have authorized the Co-Administrative Agents, the Issuing Lender and the Lenders
to treat such  Borrower  Materials as not  containing  any  material  non-public
information with respect to the Company or its securities for purposes of United
States Federal and state securities laws (PROVIDED,  HOWEVER, that to the extent
such Borrower  Materials  constitute  Information,  they shall be treated as set
forth  in  SECTION  10.15);  (y) all  Borrower  Materials  marked  "PUBLIC"  are
permitted  to be made  available  through a portion of the  Platform  designated
"Public  Investor;"  and (z) the  Co-Administrative  Agents shall be entitled to
treat any Borrower Materials that are not marked "PUBLIC" as being suitable only
for  posting on a portion of the  Platform  not  designated  "Public  Investor."
Notwithstanding  the  foregoing,  the Company and the Borrower shall be under no
obligation to mark any Borrower Materials "PUBLIC."

          6.3.  PAYMENT OF OBLIGATIONS. Pay, discharge or otherwise satisfy at
or before maturity or before they become delinquent, as the case may be, all its
material  obligations  of whatever  nature,  except where the amount or validity
thereof is currently  being  contested in good faith by appropriate  proceedings
and reserves in conformity  with GAAP with respect thereto have been provided on
the books of the relevant Group Member.

          6.4.  MAINTENANCE OF EXISTENCE;  COMPLIANCE. (a) (i) Preserve, renew
and keep in full  force and effect its  existence  and (ii) take all  reasonable
action to maintain all rights,  privileges and franchises necessary or desirable
in the normal  conduct of its  business,  except,  in each  case,  as  otherwise
permitted  by SECTION 7.4 and except,  in the case of clause (ii) above,  to the
extent that failure to do so could not reasonably be expected to have a Material
Adverse Effect; and (b) comply with all Contractual Obligations and Requirements
of Law except to the extent that failure to comply  therewith  could not, in the
aggregate, reasonably be expected to have a Material Adverse Effect.

                                       47


          6.5.  MAINTENANCE OF PROPERTY; INSURANCE

                (a) (i) Do or cause to be done all things  reasonably  necessary
to preserve and keep in good repair, working order and efficiency (ordinary wear
and tear excepted) all of the properties  owned by each Group Member,  including
without limitation,  all equipment,  machinery and facilities, and (ii) make all
the reasonably necessary repairs, renewals and replacements so that at all times
the state and  condition  of the  properties  owned by each Group Member will be
fully  preserved  and  maintained,  except  to the  extent  a  portion  of  such
properties   are  oil  and  gas   properties  no  longer  capable  of  producing
hydrocarbons in economically reasonable amounts.

                (b)  Promptly  pay  and  discharge  or  cause  to  be  paid  and
discharged  all delay rentals,  royalties,  expenses and  indebtedness  accruing
under,  and perform or cause to be performed each and every act, matter or thing
required  by,  each  and  all of the  assignments,  deeds,  leases,  sub-leases,
contracts and  agreements  affecting its interests in its properties and will do
all other things  necessary to keep  unimpaired  each Group Member's rights with
respect  thereto  and prevent any  forfeiture  thereof or a default  thereunder,
except to the extent a portion of oil and gas properties is no longer capable of
producing hydrocarbons in economically reasonable amounts.

                (c)  Operate  its  properties  or  cause  or  use   commercially
reasonable  efforts to cause such  properties  to be  operated  in a careful and
efficient  manner  in  accordance  with the  practices  of the  industry  and in
compliance with all applicable contracts and agreements and in compliance in all
material respects with all laws.

                (d) Maintain  with  financially  sound and  reputable  insurance
companies  insurance on all its property in at least such amounts and against at
least such risks (but  including in any event general  liability) as are usually
insured  against in the same general area by companies  engaged in the same or a
similar  business  and in any  case no less  comprehensive  in scope  than  that
maintained by the Company and its Subsidiaries as of the Closing Date.

          6.6.  INSPECTION OF  PROPERTY; BOOKS AND RECORDS;  DISCUSSIONS.  Keep
proper books of records and account in which full,  true and correct  entries in
conformity  with GAAP and all  Requirements of Law shall be made of all dealings
and  transactions  in  relation  to  its  business  and  activities  and  permit
representatives of any Lender (coordinated through the Co-Administrative Agents)
to visit and inspect any of its  properties  and examine and make abstracts from
any of its  books  and  records  at any  reasonable  time  and as  often  as may
reasonably be desired and to discuss the business,  operations,  properties  and
financial  and other  condition of the Group Members with officers and employees
of the Group Members and with their independent certified public accountants.

          6.7.  NOTICES. Promptly give notice to the Co-Administrative Agents
and each Lender of:

                (a) the occurrence of any Default or Event of Default;

                (b) any (i)  default or event of default  under any  Contractual
Obligation of any Group Member or (ii)  litigation,  investigation or proceeding
that  may  exist at any time  between  any  Group  Member  and any  Governmental
Authority,  that in either case, if not cured or if adversely determined, as the
case may be, could reasonably be expected to have a Material Adverse Effect;

                (c) any litigation or proceeding  affecting any Group Member (i)
in  which  the  amount  involved  is  $25,000,000  or more  and not  covered  by
insurance,  (ii) in which  injunctive  or  similar  relief is sought  which,  if
granted, could reasonably be expected to have a Material Adverse Effect or (iii)
which relates to any Loan Document;

                (d) the following  events,  as soon as possible and in any event
within 30 days after the Borrower  knows or has reason to know thereof:  (i) the
occurrence of any  Reportable  Event with respect to any Plan, a failure to make
any required  contribution  to a Plan,  the creation of any Lien in favor of the
PBGC or a Plan or any withdrawal  from, or the  termination,  Reorganization  or
Insolvency of, any Multiemployer  Plan or (ii) the institution of proceedings or
the  taking of any  other  action by the PBGC or the  Borrower  or any  Commonly
Controlled Entity or any Multiemployer Plan with respect to the withdrawal from,
or the termination, Reorganization or Insolvency of, any Plan;

                (e) any development or event that has had or could reasonably be
expected to have a Material Adverse Effect; and

                (f) the occurrence of any Internal Control Event.

Each notice  pursuant to this SECTION 6.7 shall be accompanied by a statement of
a  Responsible  Officer  setting  forth  details of the  occurrence  referred to
therein  and stating  what  action the  Company,  the  Borrower or the  relevant
Subsidiary proposes to take with respect thereto.

                                       48


          6.8.  ENVIRONMENTAL LAWS

                (a) Comply in all material  respects with, and ensure compliance
in all  material  respects by all  tenants and  subtenants,  if any,  with,  all
applicable  Environmental  Laws, and obtain and comply in all material  respects
with and maintain,  and ensure that all tenants and subtenants obtain and comply
in all material  respects  with and maintain,  any and all licenses,  approvals,
notifications,  registrations  or permits  required by applicable  Environmental
Laws as well as all  contractual  obligations  and  agreements  with  respect to
environmental remediation or other environmental matters.

                (b) Conduct and complete all investigations,  studies,  sampling
and  testing,  and all  remedial,  removal  and  other  actions  required  under
Environmental  Laws and promptly comply in all material respects with all lawful
orders and directives of all Governmental  Authorities  regarding  Environmental
Laws.

                (c) Promptly furnish to the Co-Administrative Agents all written
notices  of  violation,   orders,   claims,   citations,   complaints,   penalty
assessments,  suits or other  proceedings  received by any Group  Member,  or of
which it has notice,  pending or  threatened  against any Group  Member,  by any
governmental   authority   with   respect  to  any  alleged   violation   of  or
non-compliance  in any  material  respect  with  any  Environmental  Laws or any
permits,  licenses or  authorizations in connection with its ownership or use of
its properties or the operation of its business.

                (d)  Promptly  furnish  to  the  Co-Administrative   Agents  all
requests  for  information,   notices  of  claim,  demand  letters,   and  other
notifications,  received by any Group Member in connection with its ownership or
use of its  properties  or the conduct of its  business,  relating to  potential
responsibility  which could if adversely determined result in fines or liability
of a material amount with respect to any  investigation or clean-up of Hazardous
Material at any location.

          6.9.  COLLATERAL COVERAGE AND GUARANTEES

                (a) Prior to the Collateral Release Date,  maintain a Collateral
Coverage  Ratio  at all  times  of at least  1.5 to 1.0 in  accordance  with the
provisions set forth in SECTION 3.2(A).

                (b)  Subject  to  SECTION  10.14(B),  with  respect  to any  new
Subsidiary  created  or  acquired  after the  Closing  Date by any Group  Member
(which,  for the  purposes of this  paragraph  (b),  shall  include any existing
Subsidiary that ceases to be an "Unrestricted Subsidiary" under the Indentures),
promptly (i) cause such new  Subsidiary  (A) to become a party to the  Guarantee
Agreement and (B) to deliver to the  Administrative  Agent a certificate of such
Subsidiary,  substantially in the form of EXHIBIT C, with appropriate insertions
and attachments,  and (ii) if requested by the Administrative  Agent, deliver to
the Administrative Agent legal opinions relating to the matters described above,
which  opinions  shall be in form and  substance,  and from counsel,  reasonably
satisfactory to the Administrative Agent.

          6.10. FURTHER ASSURANCES. From time to time prior to the Collateral
Release Date, execute and deliver,  or cause to be executed and delivered,  such
additional  mortgages,  deeds of trust, chattel mortgages,  security agreements,
financing  statements,  reports  (including  reports  of the type  described  in
SECTION  6.2(D)),  instruments,   legal  opinions,   certificates  or  documents
(including,  without  limitation,  documents  of the type  described  in SECTION
5.1(I)), all in form and substance satisfactory to the Administrative Agent, and
take  all  such  actions  as  may be  requested  hereunder  (including,  without
limitation,  in order to comply with SECTION 6.9) or as the Administrative Agent
may reasonably  request for the purposes of  implementing  or  effectuating  the
provisions of this  Agreement and the other Loan Documents  (including,  without
limitation,  SECTION 6.9), or of more fully perfecting or renewing the rights of
the Administrative Agent and the Lenders with respect to the Collateral (or with
respect to any additions  thereto or  replacements  or proceeds  thereof or with
respect to any other  property or assets  hereafter  acquired by the Borrower or
any Subsidiary which may be deemed to be part of the Collateral) pursuant hereto
or thereto.  Without limiting any of the forgoing,  within 45 days following the
Closing  Date,  the  Company and the  Borrower  will permit a review of title by
counsel or other Person designated by the  Administrative  Agent with respect to
the title of the  applicable  Loan  Parties to any  property  in which a Lien is
granted  under  the  Mortgages,  such  title  review to be  satisfactory  to the
Administrative  Agent  in  its  sole  discretion.   Upon  the  exercise  by  the
Administrative  Agent or any Lender of any  power,  right,  privilege  or remedy
pursuant  to this  Agreement  or the other Loan  Documents  which  requires  any
consent, approval,  recording qualification or authorization of any Governmental
Authority,  the Company and the Borrower will execute and deliver, or will cause
the execution and delivery of, all applications, certifications, instruments and
other documents and papers that the Administrative  Agent or such Lenders may be
required to obtain from the  Company,  the  Borrower or any of their  respective
Subsidiaries for such governmental consent, approval,  recording,  qualification
or authorization.

                                       49


                         SECTION 7. NEGATIVE COVENANTS

         The Company and the Borrower  hereby jointly and severally  agree that,
so long as the  Revolving  Commitments  remain in  effect,  any Letter of Credit
remains outstanding or any Revolving Loan or other amount is owing to any Lender
or Agent  hereunder,  each of the Company and the Borrower  shall not, and shall
not permit any of its Subsidiaries to, directly or indirectly:

          7.1.  FINANCIAL CONDITION COVENANTS

                (a)  CONSOLIDATED  FIXED  CHARGE  COVERAGE  RATIO.   Permit  the
Consolidated  Fixed  Charge  Coverage  Ratio for any period of four  consecutive
fiscal  quarters of the Company then most  recently  ended  (beginning  with the
quarter ended December 31, 2004) to be less than 2.5 to 1.0.

                (b)  CONSOLIDATED  INDEBTEDNESS  TO  CONSOLIDATED  EBITDA RATIO.
Permit the ratio of (i) Consolidated  Indebtedness to (ii)  Consolidated  EBITDA
for the period of four  consecutive  fiscal  quarters of the  Company  then most
recently ended to be greater than 3.5 to 1.0.

                (c) PRESENT VALUE TO  CONSOLIDATED  INDEBTEDNESS  RATIO.  At all
times while  availability  under this  Agreement is not then being governed by a
Borrowing  Base as provided in SECTION  2.14(A),  except  during any period when
ratings for the Index Debt shall be equal to or more  favorable than BBB- by S&P
and shall be equal to or more favorable than Baa3 by Moody's permit the ratio of
(i) PV to (ii) Consolidated Indebtedness to be less than 1.33 to 1.0.

          7.2.  INDEBTEDNESS.  Create,  issue, incur,  assume,  become liable in
respect of or suffer to exist any Indebtedness, except:

                (a)  Indebtedness  of  any  Loan  Party  pursuant  to  any  Loan
Document;

                (b)  Indebtedness  (i) of the  Borrower to the Company or to any
Subsidiary of the Company,  (ii) of the Company or any  Subsidiary  Guarantor to
the  Borrower  (except in the event that there has been an  acceleration  of the
maturity of any Obligation) or to any other Subsidiary of the Company,  (iii) of
any  Subsidiary  of  the  Company  (other  than  the  Borrower  or a  Subsidiary
Guarantor)  to any  Subsidiary  of the  Company  (other  than the  Borrower or a
Subsidiary  Guarantor),  and (iv) subject to SECTION  7.7(G),  of any Subsidiary
(other  than the  Borrower or a  Subsidiary  Guarantor)  to the  Borrower or any
Subsidiary Guarantor;

                (c)  Guarantee  Obligations  incurred in the ordinary  course of
business  by the  Borrower  and  the  Company  or any  of  its  Subsidiaries  of
obligations of the Borrower,  any Subsidiary  Guarantor and,  subject to SECTION
7.7(G), of any Subsidiary (other than the Borrower or a Subsidiary Guarantor);

                (d)  Indebtedness  outstanding  on the date hereof and listed on
SCHEDULE 7.2(D) and any refinancings, refundings, renewals or extensions thereof
(without  increasing,  or  shortening  the  maturity  of, the  principal  amount
thereof);

                (e) Indebtedness (including,  without limitation,  Capital Lease
Obligations)  secured  by Liens  permitted  by  SECTION  7.3(G) in an  aggregate
principal amount not to exceed $150,000,000 at any one time outstanding;

                (f) Indebtedness under the Indentures as of the Closing Date;

                (g) Hedge Agreements entered into with the purpose and effect of
hedging  price risk on oil or gas  expected  to be  produced  by Group  Members,
PROVIDED  that at all times:  (i) no such  contract has, or fixes a price for, a
term including any month later than 60 months from the date such Hedge Agreement
is entered into (except Hedge Agreements hedging only basis differential  risk);
(ii) the aggregate  notional amount covered by all such Hedge Agreements (except
Hedge Agreements  hedging only basis  differential  risk) for each single future
month  (determined,  in the case of Hedge  Agreements  that are not settled on a
monthly  basis,  by a  monthly  proration  acceptable  to the  Co-Administrative
Agents) does not exceed (A) if such month is or is prior to the 36th month after
the month in which  such  determination  is being  made,  100% of  Budget  Basis
Projected Production projected to be produced during such month, and (B) if such
month is later than the 36th month  after the month in which such  determination
is being made, 100% of Adjusted SPE Basis Projected  Production  projected to be
produced during such month,  and (iii) each such contract is with a counterparty
or has a guarantor  of the  obligation  of the  counterparty  who  (unless  such
counterparty is a Lender or one of its  Affiliates) is a nationally  recognized,
well-capitalized  hedging counterparty or is an investment  grade-rated industry
participant;

                                       50


                (h) Hedge  Agreements  entered  into by a Group  Member with the
purpose  and  effect  of  fixing  interest  rates  on  a  principal   amount  of
Indebtedness of such Group Member that is accruing  interest at a variable rate,
PROVIDED that the aggregate  notional amount of such contracts never exceeds 75%
of the  anticipated  outstanding  principal  balance of the  Indebtedness  to be
hedged by such  contracts or an average of such  principal  balances  calculated
using a  generally  accepted  method of  matching  interest  swap  contracts  to
declining principal balances,  and the floating rate index of each such contract
generally  matches the index used to determine the floating rates of interest on
the corresponding indebtedness to be hedged by such contract; and the fixed rate
index of each such contract  generally matches the interest on the corresponding
obligation  to be  hedged  by such  contract;  PROVIDED  further  that each such
contract is with a  counterparty  or has a guarantor  of the  obligation  of the
counterparty who (unless such counterparty is a Lender or one of its Affiliates)
is a nationally recognized, well-capitalized hedging counterparty;

                (i) liabilities  with respect to accrued  revenues and royalties
due to others during the period the payment thereof has been properly  suspended
in accordance with applicable agreements and applicable law;

                (j) Hedging  Agreements  entered  into by the  Company  with the
purpose and effect of  contracting  for variable  interest  rates on a principal
amount of Indebtedness  of the Company  (which,  for purposes of this subsection
only,  shall  include  the  liquidation  preference  on  preferred  stock of the
Company) that is accruing  interest or dividends at a fixed rate,  provided that
(1) the ratio of fixed rate Indebtedness of the Company to total Indebtedness of
the Company (excluding Indebtedness outstanding under this Agreement) remains at
least  sixty-five   percent  (65%),  and  (2)  each  such  contract  is  with  a
counterparty  or has a  guarantor  of the  obligation  of the  counterparty  who
(unless such  counterparty is a Lender or one of its Affiliates) is a nationally
recognized  well  capitalized  hedging  counterparty  or is an investment  grade
industry participant; plus the Guarantee Obligations of one or more of the Group
Members of the  obligations  of the Company  permitted to be incurred under this
SECTION 7.2(J);

                (k)  additional  Indebtedness  of  the  Company  or  any  of its
Subsidiaries  in  an  aggregate  principal  amount  (for  the  Company  and  all
Subsidiaries) not to exceed $150,000,000 at any one time outstanding,  PLUS, the
lesser of (i) for a period  limited  to 90 days after an  acquisition  permitted
under  SECTION  7.7(H),  the  amount of  indebtedness  secured by Liens upon any
property so acquired or owing by the Person so acquired and existing at the time
of such  acquisition and not incurred in contemplation  thereof,  and, after the
end of such 90 day period, zero, and (ii) $100,000,000;

                (l)  Indebtedness  evidenced  by  senior or  subordinated  notes
issued by the Company, and Guarantees thereof by the Borrower and the Subsidiary
Guarantors;  PROVIDED that (i) such  Indebtedness is unsecured,  (ii) such notes
are issued in a public offering under a registration statement, or are issued to
accredited  institutional investors pursuant to Rule 144A or Regulation S of the
Securities  Exchange  Commission  with a  covenant  to  exchange  such notes for
substantially  identical notes offered under such a registration  statement (and
the issuance of such registered notes upon such exchange shall not be considered
a new incurrence of Indebtedness  under this SECTION 7.2(L)),  (iii) at the time
of such  issuance  and  after  giving  effect  thereto,  each  of the Pro  Forma
Incurrence Tests are met, (iv) no principal amount of such Indebtedness  matures
earlier than two (2) years after the Revolving Termination Date, (v) at the time
of such issuance and after giving effect thereto, no Default or Event of Default
shall exist or would occur,  (vi) such  Indebtedness is governed by an Indenture
where none of the  covenants and events of default are more  restrictive  on the
Company and its Subsidiaries  than the covenants and events of default under the
Indenture  dated as of December 8, 2004,  (vii) at the time of such issuance and
after giving effect thereto, (a) if rated by both such rating agencies,  each of
Moody's and S&P  maintains  its rating  applicable to the Index Debt equal to or
more  favorable  than its rating of such debt in effect on the Closing  Date and
equal to or more favorable  than its most  favorable  rating of such debt during
the 180 days preceding the issuance of such notes, (b) if only one of Moody's or
S&P provides a rating,  that agency maintains its rating applicable to the Index
Debt  equal to or more  favorable  than its rating of such debt in effect on the
Closing Date and equal to or more favorable  than its most  favorable  rating of
such debt during the 180 days  preceding  the  issuance of such notes and (viii)
the Company shall have delivered to the  Co-Administrative  Agents a certificate
in  reasonable   detail   reflecting   compliance  with  each  of  the  forgoing
requirements  of this SECTION  7.2(L),  including  calculations  with supporting
detail  regarding  each of the Pro Forma  Incurrence  Tests,  together with such
other  evidence of  compliance  with the forgoing  requirements  of this SECTION
7.2(L) as the Co-Administrative Agents may reasonably request; and

                                       51


                (m) The Permitted  Securitization (and any performance  guaranty
given by the Company in connection  with the Permitted  Securitization  provided
such  performance  guaranty  applies  only  to the  servicer's  or  originator's
obligations thereunder).

          7.3.  LIENS. Create, incur, assume orsuffer to exist any Lien upon any
of its property, whether now owned or hereafter acquired, except for:

                (a) Liens for taxes not yet due or that are being  contested  in
good faith by  appropriate  proceedings,  PROVIDED that  adequate  reserves with
respect thereto are maintained on the books of the Company or its  Subsidiaries,
as the case may be, in conformity with GAAP;

                (b)  carriers',   warehousemen's,   mechanics',   materialmen's,
repairmen's or other like Liens arising in the ordinary  course of business that
are not overdue for a period of more than 30 days or that are being contested in
good faith by appropriate proceedings;

                (c)   pledges  or   deposits   in   connection   with   workers'
compensation, unemployment insurance and other social security legislation;

                (d) deposits to secure the performance of bids,  trade contracts
(other than for  borrowed  money),  leases,  statutory  obligations,  surety and
appeal bonds,  performance bonds and other obligations of a like nature incurred
in the ordinary course of business;

                (e)  easements,  rights-of-way,  restrictions  and other similar
encumbrances incurred in the ordinary course of business that, in the aggregate,
are not  substantial  in amount and that do not in any case  materially  detract
from the value of the property subject thereto or materially  interfere with the
ordinary conduct of the business of the Borrower or any of its Subsidiaries;

                (f) Liens in  existence  on the date  hereof  listed on SCHEDULE
7.3(F), securing Indebtedness permitted by SECTION 7.2(D), PROVIDED that no such
Lien is spread to cover any additional  property after the Closing Date and that
the amount of Indebtedness secured thereby is not increased;

                (g) Liens  securing  Indebtedness  of the  Company  or any other
Subsidiary  incurred  pursuant to SECTION  7.2(E) to finance the  acquisition of
fixed  or  capital  assets,  PROVIDED  that  (i) such  Liens  shall  be  created
substantially  simultaneously  with the  acquisition  of such  fixed or  capital
assets,  (ii) such Liens do not at any time encumber any property other than the
property  financed  by such  Indebtedness  and (iii) the amount of  Indebtedness
secured thereby is not increased;

                (h) Liens created pursuant to the Security Documents;

                (i) any  interest or title of a lessor  under any lease  entered
into by the Company or any Subsidiary in the ordinary course of its business and
covering only the assets so leased;

                (j) Prior to the Collateral  Release Date,  Liens on oil and gas
properties  (that are not  Collateral) of the Company and its  Subsidiaries  the
aggregate  value of which does not  exceed,  at any time,  $50,000,000  securing
Indebtedness  under any Hedge Agreement with any Lender or any affiliate thereof
(not otherwise permitted under SECTION 7.3(M));

                (k) any (i)  pledge of cash to  secure  the  obligations  of the
Company  and its  Subsidiaries  with  respect  to any  Hedge  Agreement  or (ii)
issuance of letters of credit  (other than  Letters of Credit  issued under this
Agreement)  to secure  such  obligations  or other  obligations  arising  in the
ordinary  course of business  (which letters of credit shall be deemed to not be
Indebtedness  for purposes of SECTION 7.2), in the case of both (i) and (ii) not
to exceed,  at any time,  an amount of cash and face amount of letters of credit
equal to $50,000,000 in the aggregate;

                (l)  for a  period  limited  to 90  days  after  an  acquisition
permitted under SECTION 7.7(H), Liens upon property so acquired, existing at the
time of such acquisition and not incurred in contemplation thereof, and not upon
any other property, securing only Indebtedness permitted by SECTION 7.2(K);

                (m) Prior to the  Collateral  Release Date,  Liens  securing the
Indebtedness under any Hedging Support Credit Facility on oil and gas properties
(that are not  Collateral)  of the Company and its  Subsidiaries,  the aggregate
value of which does not materially  exceed, at the time any such Lien is created
or modified, the Hedging Support Credit Facility Limitations; and

                (n) Liens in respect of Permitted  Securitization on Receivables
and Related Security  assigned from time to time to a Securitization  Subsidiary
or one or more investors or other purchasers  (other than the Company,  Borrower
or a Subsidiary), as permitted by SECTION 7.5(E).

          7.4.  FUNDAMENTAL CHANGES.  Enter into any merger,  consolidation or
amalgamation,   or  liquidate,  wind  up  or  dissolve  itself  (or  suffer  any
liquidation  or  dissolution),  or Dispose of, all or  substantially  all of its
property or business, except that:

                                       52


                (a) any Subsidiary of the Borrower may be merged or consolidated
with or into the Borrower (PROVIDED that the Borrower shall be the continuing or
surviving  entity)  or with or into any  Subsidiary  of the  Borrower  that is a
Subsidiary  Guarantor  (PROVIDED  that  the  Subsidiary  Guarantor  shall be the
continuing or surviving entity) or, subject to SECTION 7.7(G),  with or into any
other Subsidiary of the Borrower;

                (b) any  Subsidiary of the Borrower may Dispose of any or all of
its assets (upon  voluntary  liquidation  or otherwise) to the Borrower,  to any
Subsidiary of the Borrower that is a Subsidiary Guarantor or, subject to SECTION
7.7(G), to any other Subsidiary of the Borrower;

                (c) any  Subsidiary of the Company  (other than the Borrower and
its  Subsidiaries)  may be consolidated  with or into the Company (PROVIDED that
the Company  shall be the  continuing  or surviving  entity) or with or into any
Subsidiary  Guarantor  (other  than  the  Borrower  or any of its  Subsidiaries)
(PROVIDED  that the  Subsidiary  Guarantor  shall be the continuing or surviving
entity) or, subject to SECTION 7.7(G),  any Subsidiary  (other than the Borrower
or any of its Subsidiaries and any Subsidiary Guarantor); and

                (d) any  Subsidiary of the Company  (other than the Borrower and
its  Subsidiaries)  may  Dispose  of any or all of its  assets  (upon  voluntary
liquidation or otherwise) to the Company or any Subsidiary Guarantor (other than
the Borrower or any of its  Subsidiaries)  or,  subject to SECTION  7.7(G),  any
Subsidiary  (other  than  the  Borrower  or  any  of its  Subsidiaries  and  any
Subsidiary Guarantor).

          7.5.  DISPOSITION  OF  PROPERTY.  Dispose   of  any of its  property,
whether now owned or hereafter  acquired,  or, in the case of any  Subsidiary of
the Company,  issue or sell any shares of such Subsidiary's Capital Stock to any
Person, except:

                (a) the  Disposition  of  obsolete  or worn out  property in the
ordinary course of business;

                (b)  inventory  (including  oil and gas  sold  as  produced  and
seismic data) which is sold in the ordinary course of business on ordinary trade
terms;

                (c) interests in oil and gas properties, or portions thereof, to
which no proved reserves of oil, gas or other liquid or gaseous hydrocarbons are
properly attributed;

                (d) Dispositions permitted by SECTION 7.4(B) or 7.4(D);

                (e) Receivables and Related Security  assigned from time to time
to a  Securitization  Subsidiary  or one or more  investors or other  purchasers
(other than the Company, Borrower or a Subsidiary);  PROVIDED that no assignment
or other  disposition of Receivables or Related  Securities may be made after an
Event of  Default  specified  in SECTION  8(F) or after  Borrower  has  received
written notice from a Co-Administrative  Agent that no such assignments shall be
made as a result of the occurrence and during the continuance of any other Event
of Default; and

                (f)  other  property  that is sold for fair  consideration  to a
Person  who  is  not  an  Affiliate;  PROVIDED  that  (i)  at  all  times  while
availability  under this Agreement is then being governed by a Borrowing Base as
provided in SECTION 2.14(A), the maximum amount of Proved properties sold in the
period between any two regular annual Determination Dates on which the Borrowing
Base is designated (or the period between the last regular annual  Determination
Date on which the  Borrowing  Base is  designated  in the  Revolving  Commitment
Period and the  Revolving  Termination  Date)  shall not exceed 5% of the Proved
properties of the Company and its  Subsidiaries as of the December 31 Evaluation
Date with respect of the first such  Determination Date and based upon the value
set forth in the Engineering Report with respect to the first such Determination
Date,  (ii) at the time of such sale and after  giving  effect  thereto on a pro
forma basis no Default or Event of Default shall exist or would result and (iii)
at all  times  prior to the  Collateral  Release  Date,  the  maximum  amount of
Collateral sold in the period between any two regular semi-annual  Determination
Dates on which the  Collateral  Value is designated  (or the period  between the
last regular  semi-annual  Determination  Date on which the Collateral  Value is
designated in the  Revolving  Commitment  Period and the  Revolving  Termination
Date)  shall  not  exceed  the  sum of (A) the  amount,  if any,  by  which  the
Collateral  Value most recently  designated  exceeded 150% of the greater of the
Total  Revolving  Commitments  and, if  applicable,  the Borrowing Base plus (B)
$20,000,000;  PROVIDED that to the extent the aggregate Net Cash Proceeds of all
such Dispositions  after the date of this Agreement  exceeds  $15,000,000 (i) so

                                       53


long as no Default or Event of Default  shall have  occurred and be  continuing,
within six months following the receipt of such proceeds by the Group Member the
amount of such excess shall be either applied to permanently  repay  outstanding
Indebtedness  of any Group Member or to pay the purchase price of proved oil and
gas  properties  acquired  by a Group  Member or to pay  development  costs with
respect to proved oil and gas properties  then owned by a Group Member,  or (ii)
if a Default or Event of Default  shall have  occurred and be  continuing at the
time of such  Disposition,  the  amount of such  excess  (any such  excess,  the
"EXCESS AMOUNT") shall be applied in accordance with SECTION 3.2(C).

          7.6.  RESTRICTED  PAYMENTS.  Declare or pay any  dividend  (other than
dividends payable solely in common stock of the Person making such dividend) on,
or make any  payment on account  of, or set apart  assets for a sinking or other
analogous fund for, the purchase,  redemption,  defeasance,  retirement or other
acquisition of, any Capital Stock of any Group Member (or enter into or be party
to, or make any payment under, any Synthetic  Purchase Agreement with respect to
any such Capital Stock if the purchase,  redemption,  defeasance,  retirement or
other acquisition thereof by the Company and its Subsidiaries would otherwise be
prohibited  under this SECTION 7.6),  whether now or hereafter  outstanding,  or
make any other  distribution in respect thereof,  either directly or indirectly,
whether in cash or property or in  obligations  of the Company,  the Borrower or
any  Subsidiary  of  the  Company,  or  enter  into  any  derivatives  or  other
transaction  with any financial  institution,  commodities  or stock exchange or
clearinghouse (a "DERIVATIVES COUNTERPARTY") obligating any Group Member to make
payments to such  Derivatives  Counterparty  as a result of any change in market
value of any such Capital Stock (collectively,  "RESTRICTED  PAYMENTS"),  except
that:

                (a) any  Subsidiary  of the  Company may pay cash  dividends  or
distributions on its Capital Stock to the Company or any of its Subsidiaries;

                (b) so long  as no  Default  or  Event  of  Default  shall  have
occurred  and be  continuing  or would  result  therefrom,  the  Company may (i)
purchase the  Company's  common  stock or common  stock  options from present or
former  officers or employees of any Group Member upon the death,  disability or
termination  of  employment  of such  officer or  employee,  PROVIDED,  that the
aggregate  amount of payments  under this clause  (b)(i)  after the Closing Date
shall not exceed $5,000,000,  or (ii) purchase the Company's common stock, other
than from  present or former  officers or  employees  of any Group Member in the
circumstance  set  forth in the  preceding  clause  (b)(i),  provided,  that the
aggregate  amount of payments  under this clause  (b)(ii) after the Closing Date
shall not exceed $100,000,000; and

                (c) so long  as no  Default  or  Event  of  Default  shall  have
occurred and be continuing or would result  therefrom at the time such dividends
are declared  (determined on a pro forma basis as if such dividends were paid in
cash on the  date so  declared),  the  Company  may pay  cash  dividends  on its
Permitted Preferred Stock and its common stock.

          7.7. INVESTMENTS.  Make any advance, loan, extension of credit (by way
of guaranty or  otherwise) or capital  contribution  to, or purchase any Capital
Stock,  bonds,  notes,  debentures  or other debt  securities  of, or any assets
constituting  a business  unit of, or make any other  investment  in, any Person
(all of the foregoing, "INVESTMENTS"), except:

                (a)  extensions  of  trade  credit  in the  ordinary  course  of
                     business;

                (b) investments in Cash Equivalents;

                (c) Guarantee Obligations permitted by SECTION 7.2;

                (d) loans and  advances to  employees of any Group Member of the
Company in the ordinary course of business (including for travel,  entertainment
and  relocation  expenses) in an aggregate  amount for all Group  Members not to
exceed $1,000,000 at any one time outstanding;

                (e) the purchase by the Company of its outstanding  senior notes
to the extent permitted by SECTION 7.8;

                (f) intercompany Investments by any Group Member in the Borrower
or any Person that, prior to such Investment, is a Subsidiary Guarantor (and, in
the case of Investments by the Borrower or any of its Subsidiaries, a Subsidiary
of the Borrower);

                (g)  intercompany  Investments  in a  Securitization  Subsidiary
consisting of equity  interests in or debt  obligations  of such  Securitization
Subsidiary  resulting from assignments  permitted under SECTION 7.5(E) in excess
of the cash  payment  received in exchange for such  assignments,  not to exceed
amounts  consistent with  requirements for similar  securitizations  of accounts
receivable of other companies generally;

                                       54


                (h)  intercompany  Investments  by  the  Company  or  any of its
Subsidiaries in any Person, that, prior to such Investment,  is a Subsidiary but
not a Subsidiary Guarantor (including, without limitation, Guarantee Obligations
with  respect  to  obligations  of any such  Subsidiary,  loans made to any such
Subsidiary and Investments resulting from mergers with or sales of assets to any
such Subsidiary) PLUS any Unrestricted Subsidiary Investments in connection with
the  designation  of a  Subsidiary  Guarantor  or any newly  created or acquired
Subsidiary  as an  "Unrestricted  Subsidiary"  under the  Indentures  (MINUS any
Unrestricted  Subsidiary  Investment in  connection  with the  designation  of a
Subsidiary that is not a Subsidiary Guarantor as a "Restricted Subsidiary" under
the Indentures and a Subsidiary Guarantor hereunder) in an aggregate outstanding
amount (valued at cost) not to exceed at any time,  together with any Investment
pursuant  to  paragraph  (l) of this  Section  that  results in the  creation or
acquisition  of  a  Subsidiary  that  is  not  a  Subsidiary  Guarantor  or  the
acquisition  of assets  by, or the  contribution  or  transfer  of assets  to, a
Subsidiary  that is not a Subsidiary  Guarantor,  $100,000,000  in the aggregate
(except to the extent the  Investment is made in the form of the common stock of
the Company);

                (i)  acquisitions  of oil  and  gas  properties  and oil and gas
exploration  and  extraction  assets and assets  directly  related  thereto  and
acquisitions  of all the  Capital  Stock  of any  Person  whose  assets  consist
primarily of oil and gas properties and oil and gas  exploration  and extraction
assets and assets directly related thereto the consideration for which is in the
form of cash or Capital Stock of the Company;

                (j) the entry into operating agreements,  processing agreements,
farm-out agreements, development agreements, area of mutual interest agreements,
contracts for the transportation or exchange of oil and natural gas, unitization
agreements,  pooling arrangements,  joint bidding agreements, service contracts,
or other similar customary agreements,  transactions,  properties,  interests or
arrangements,  in each  case  made or  entered  into in the  ordinary  course of
business as  conducted  by the Company  and its  Subsidiaries  as of the Closing
Date;

                (k) Investments  pursuant to the employment  agreements  between
each of Aubrey K.  McClendon and Tom L. Ward and the Company as are in effect as
of the Closing Date;

                (l)  Investments  resulting from  Indebtedness  permitted  under
SECTION 7.2(B);

                (m) Investments set forth on SCHEDULE 7.7(M);

                (n) Investments by the Company or any of its Subsidiaries in any
publicly traded securities of a company whose business consists primarily of oil
and gas exploration, development, production, drilling or field services; and

                (o) in addition to Investments  otherwise expressly permitted by
this Section,  Investments by the Company or any of its Subsidiaries (including,
without limitation, joint ventures and partnerships) in an aggregate outstanding
amount at any time (valued at cost) not to exceed  $100,000,000  during the term
of this Agreement (except to the extent such consideration is in the form of the
common stock of the Company);

provided that, with respect to any Investment  under  SUBSECTIONS  7.7(C),  (H),
(I),  (N) or (O),  no  Default or Event of Default  shall have  occurred  and be
continuing or would result therefrom.

          7.8.  OPTIONAL PAYMENTS AND MODIFICATIONS OF CERTAIN DEBT INSTRUMENTS.
(a) Make or  offer  to make  any  optional  or  voluntary  payment,  prepayment,
repurchase or redemption of or otherwise  optionally or  voluntarily  defease or
segregate funds with respect to  Indebtedness  under any Indenture or enter into
any derivative or other transaction with any Derivatives Counterparty obligating
the Company, the Borrower or any Subsidiary to make payments to such Derivatives
Counterparty as a result of any change in market value of any such Indebtedness;
(b)  amend,  modify,  waive or  otherwise  change,  or  consent  or agree to any
amendment,  modification,  waiver  or  other  change  to,  any of the  terms  of
Indebtedness under the Indentures (other than any such amendment,  modification,
waiver or other  change that (i) would  extend the maturity or reduce the amount
of any  payment of  principal  thereof or reduce the rate or extend any date for
payment of  interest  thereon and (ii) does not involve the payment of a consent
fee); or (c) enter into or be party to, or make any payment under, any Synthetic
Purchase  Agreement with respect to any  Indebtedness  the making or offering to
make  of any  optional  or  voluntary  payment  or  prepayment  thereon,  or any
repurchase or  redemption  thereof,  or the optional or voluntary  defeasance or
segregation of funds with respect thereto,  the Company and its Subsidiaries are
otherwise  prohibited  from doing under this  SECTION  7.8;  except  optional or
voluntary  payments,  prepayments,  exchanges,  redemptions,  or  repurchases in
market  transactions  of  Indebtedness  under any  Indenture if before and, on a
proforma  basis after  giving  effect to such  purchase,  no Default or Event of
Default shall exist.

                                       55


          7.9.  TRANSACTIONS  WITH  AFFILIATES.   Enter  into  any  transaction,
including any purchase,  sale,  lease or exchange of property,  the rendering of
any service or the payment of any management, advisory or similar fees, with any
Affiliate  (other than the Company,  the Borrower or any  Subsidiary  Guarantor)
unless such transaction is (a) otherwise permitted under this Agreement,  (b) in
the ordinary course of business of the relevant Group Member,  and (c) upon fair
and reasonable  terms no less  favorable to the relevant  Group Member,  than it
would obtain in a comparable arm's length  transaction with a Person that is not
an Affiliate.

          7.10. SALES AND LEASEBACKS. Enter into any arrangement with any Person
providing for the leasing by any Group Member of real or personal  property that
has been or is to be sold or  transferred by such Group Member to such Person or
to any other Person to whom funds have been or are to be advanced by such Person
on the  security of such  property or rental  obligations  of such Group  Member
(including,  without  limitation,  any Sale/Leaseback  Transaction as defined in
each of the  Indentures)  unless  the  proceeds  received  by any  Group  Member
therefrom (i) in the aggregate for all such  arrangements  after the date hereof
does not exceed $50,000,000 and (ii) for each such arrangement is certified by a
Responsible  Officer  to be at  least  equal  to the  fair  market  value of the
property sold under such arrangement.

          7.11. CHANGES IN FISCAL PERIODS. Permit the fiscal year of the Company
to end on a day  other  than  December  31 or  change  the  Company's  method of
determining fiscal quarters.

          7.12. NEGATIVE PLEDGE CLAUSES. Enter into or suffer to exist or become
effective any agreement that prohibits or limits the ability of any Group Member
to create, incur, assume or suffer to exist any Lien upon any of its property or
revenues, whether now owned or hereafter acquired, other than (a) this Agreement
and the other Loan Documents,  (b) the Indentures,  (c) any agreements governing
any purchase money Liens or Capital Lease Obligations otherwise permitted hereby
(in which case, any  prohibition or limitation  shall only be effective  against
the assets financed thereby),  (d) any Permitted  Securitization (in which case,
any  prohibition or limitation  shall only be effective  against the Receivables
and Related Security  assigned  thereunder),  and (e) any Hedging Support Credit
Facility (in which case,  any  prohibition  or limitation  shall comply with the
limitations set forth on EXHIBIT J).

          7.13. CLAUSES  RESTRICTING  SUBSIDIARY  DISTRIBUTIONS.  Enter into or
suffer to exist or become effective any consensual encumbrance or restriction on
the  ability  of any  Subsidiary  of the  Company  or the  Borrower  to (a) make
Restricted  Payments in respect of any Capital Stock of such Subsidiary held by,
or pay any  Indebtedness  owed  to,  the  Company,  the  Borrower  or any  other
Subsidiary of the Company or the Borrower, as the case may be, (b) make loans or
advances to, or other  Investments  in, the Company or the Borrower or any other
Subsidiary of the Company or the  Borrower,  as the case may be, or (c) transfer
any of its assets to the Company or the Borrower or any other  Subsidiary of the
Company or the  Borrower,  as the case may be, except for such  encumbrances  or
restrictions  existing under or by reason of (i) any restrictions existing under
the Loan Documents,  (ii) any restrictions with respect to a Subsidiary  imposed
pursuant to an  agreement  that has been  entered  into in  connection  with the
Disposition of all or  substantially  all of the Capital Stock or assets of such
Subsidiary,  and  (iii) any  restrictions  under the  Indentures  applicable  to
"Unrestricted   Subsidiaries"  thereunder,  so  long  as  such  entities  remain
"Unrestricted Subsidiaries" thereunder.

          7.14. TAKE-OR-PAY  CONTRACTS.  No Group  Member  will  enter into any
"take-or-pay"  contract or other  contract or  arrangement  for the  purchase of
goods or services which obligates it to pay for such goods or service regardless
of whether they are delivered or furnished to it other than from oil and natural
gas fixed transportation arrangements.

          7.15. LINES OF BUSINESS.  Enter into any business,  either directly or
through any Subsidiary, except for the marketing,  exploration and extraction of
oil and gas and services  related  thereto  which  constitutes  the business the
Company and its Subsidiaries are engaged in as of the date of this Agreement.

          7.16.  SENIOR DEBT LIMIT.  Permit the Total  Revolving  Extensions  of
Credit at any time to exceed the Senior Debt Limit at such time.

                                       56


          7.17. PREFERRED STOCK ISSUANCE.  Create,  issue, incur, assume, become
liable in respect of or suffer to exist any Preferred Stock other than Preferred
Stock outstanding on the Closing Date,  unless: (i) at the time of such issuance
and after giving effect thereto,  the portion of the Pro Forma  Incurrence Tests
set forth in clause (a) of the definition of Pro Forma  Incurrence Tests is met,
(ii) by its terms (or by the terms of any security into which it is  convertible
or for which it is exchangeable), or upon the happening of any event or with the
passage of time, no amount,  other than  quarterly cash  dividends,  is payable,
matures,  is mandatorily  redeemable,  pursuant to a sinking fund  obligation or
otherwise,  or is  exchangeable  or  convertible  at the  option  of the  holder
thereof,  in  whole or in part,  on or prior to the date  that is two (2)  years
after the  Revolving  Termination  Date other than any  redemption,  exchange or
conversion  only into  common  stock of the  Company  or any  other  redemption,
exchange or conversion rights that cannot be exercised prior to the date that is
two (2) years after the Revolving  Termination  Date,  (iii) at the time of such
issuance and after giving effect  thereto,  no Default or Event of Default shall
exist or  would  exist,  and  (iv)  the  Company  shall  have  delivered  to the
Co-Administrative   Agents  a  certificate  in  reasonable   detail   reflecting
compliance  with  each  of the  forgoing  requirements  of  this  SECTION  7.17,
including  calculation  with supporting  detail regarding the portion of the Pro
Forma  Incurrence  Tests set forth in clause (a) of the  definition of Pro Forma
Incurrence  Tests is met,  together with such other evidence of compliance  with
the forgoing requirements of this SECTION 7.17 as the  Co-Administrative  Agents
may reasonably request.

                          SECTION 8. EVENTS OF DEFAULT

         If any of the following  events shall occur and be continuing:

                (a)  the  Borrower  shall  fail  to  pay  any  principal  of any
Revolving Loan or L/C Obligation  when due in accordance  with the terms hereof;
or the  Borrower  shall fail to pay any  interest on any  Revolving  Loan or L/C
Obligation,  or any other  amount  payable  hereunder  or under  any other  Loan
Document,  within five days after any such interest or other amount  becomes due
in accordance with the terms hereof; or

                (b) any  representation  or warranty  made or deemed made by any
Loan Party  herein or in any other Loan  Document  or that is  contained  in any
certificate,  document or  financial or other  statement  furnished by it at any
time under or in connection  with this Agreement or any such other Loan Document
shall prove to have been inaccurate in any material respect on or as of the date
made or deemed made; or

                (c) (i) any  Loan  Party  shall  default  in the  observance  or
performance of any agreement contained in SECTION 6.2(D),  clause (I) or (II) of
SECTION  6.4(A)  (with  respect to the Company and the Borrower  only),  SECTION
6.7(A),  6.9 or SECTION 7 of this  Agreement  or (ii) a  "default"  under and as
defined in any Mortgage shall have occurred and be continuing; or

                (d)  any  Loan  Party  shall   default  in  the   observance  or
performance of any other agreement contained in this Agreement or any other Loan
Document (other than as provided in paragraphs (a) through (c) of this Section),
and such default shall continue  unremedied for a period of 30 days after notice
to the Borrower from either Co-Administrative Agent; or

                (e) any Group  Member (i)  defaults in making any payment of any
principal of any Indebtedness (including any Guarantee Obligation, but excluding
the Revolving Loans) on the scheduled or original due date with respect thereto;
or (ii) defaults in making any payment of any interest on any such  Indebtedness
beyond the period of grace,  if any,  provided in the  instrument  or  agreement
under which such  Indebtedness was created;  or (iii) defaults in the observance
or  performance  of any  other  agreement  or  condition  relating  to any  such
Indebtedness or contained in any instrument or agreement evidencing, securing or
relating thereto,  or any other event shall occur or condition exist, the effect
of which  default  or other  event or  condition  is to cause,  or to permit the
holder or beneficiary of such  Indebtedness  (or a trustee or agent on behalf of
such holder or  beneficiary)  to cause,  with the giving of notice if  required,
such  Indebtedness  to become  due  prior to its  stated  maturity  or to become
subject to a mandatory  offer to purchase by the obligor  thereunder  or (in the
case of any such  Indebtedness  constituting  a Guarantee  Obligation) to become
payable;  PROVIDED,  that a default, event or condition described in clause (i),
(ii) or (iii) of this paragraph (e) shall not at any time constitute an Event of
Default unless, at such time, one or more defaults,  events or conditions of the
type  described in clauses (i), (ii) and (iii) of this  paragraph (e) shall have
occurred  and  be  continuing  with  respect  to  Indebtedness  the  outstanding
principal amount of which exceeds in the aggregate $50,000,000; or

                                       57

                (f) (i) any Group Member shall commence any case,  proceeding or
other action (A) under any existing or future law of any jurisdiction,  domestic
or foreign,  relating to  bankruptcy,  insolvency,  reorganization  or relief of
debtors,  seeking to have an order for  relief  entered  with  respect to it, or
seeking to  adjudicate  it bankrupt  or  insolvent,  or seeking  reorganization,
arrangement,  adjustment, winding-up, liquidation,  dissolution,  composition or
other relief with respect to it or its debts,  or (B) seeking  appointment  of a
receiver,  trustee,  custodian,  conservator or other similar official for it or
for all or any substantial part of its assets,  or any Group Member shall make a
general  assignment  for the  benefit of its  creditors;  or (ii) there shall be
commenced  against any Group  Member any case,  proceeding  or other action of a
nature referred to in clause (i) above that (A) results in the entry of an order
for relief or any such  adjudication or appointment or (B) remains  undismissed,
undischarged  or  unbonded  for a period  of 60 days;  or (iii)  there  shall be
commenced against any Group Member any case,  proceeding or other action seeking
issuance of a warrant of  attachment,  execution,  distraint or similar  process
against all or any  substantial  part of its assets that results in the entry of
an order for any such relief that shall not have been  vacated,  discharged,  or
stayed or bonded  pending  appeal  within  60 days  from the entry  thereof;  or
(iv)any Group Member shall take any action in furtherance  of, or indicating its
consent to, approval of, or acquiescence in, any of the acts set forth in clause
(i), (ii), or (iii) above; or (v) any Group Member shall generally not, or shall
be unable to, or shall admit in writing its  inability to, pay its debts as they
become due; or

                (g) (i) any Person shall engage in any "prohibited  transaction"
(as defined in Section 406 of ERISA or Section 4975 of the Code)  involving  any
Plan, (ii) any  "accumulated  funding  deficiency" (as defined in Section 302 of
ERISA),  whether or not waived, shall exist with respect to any Plan or any Lien
in favor of the PBGC or a Plan shall  arise on the assets of the  Company or any
Commonly  Controlled  Entity,  (iii) a Reportable Event shall occur with respect
to, or  proceedings  shall  commence to have a trustee  appointed,  or a trustee
shall be appointed,  to administer or to terminate,  any Single  Employer  Plan,
which  Reportable  Event or  commencement  of  proceedings  or  appointment of a
trustee is, in the reasonable opinion of the Majority Lenders,  likely to result
in the  termination  of such Plan for  purposes  of Title IV of ERISA,  (iv) any
Single Employer Plan shall terminate for purposes of Title IV of ERISA,  (v) the
Borrower or any Commonly  Controlled Entity shall, or in the reasonable  opinion
of the Majority  Lenders is likely to, incur any liability in connection  with a
withdrawal from, or the Insolvency or Reorganization of, a Multiemployer Plan or
(vi) any other event or  condition  shall occur or exist with respect to a Plan;
and in each case in clauses (i) through  (vi)  above,  such event or  condition,
together with all other such events or conditions,  if any,  could,  in the sole
judgment  of the  Majority  Lenders,  reasonably  be expected to have a Material
Adverse Effect; or

                (h) one or more  judgments or decrees  shall be entered  against
any Group  Member  involving  in the  aggregate a  liability  (not paid or fully
covered by insurance as to which the relevant insurance company has acknowledged
coverage) of  $50,000,000  or more,  and all such judgments or decrees shall not
have been vacated,  discharged,  stayed or bonded  pending appeal within 30 days
from the entry thereof; or

                (i) any of the Security  Documents shall cease,  for any reason,
to be in full force and effect,  or any Loan Party or any  Affiliate of any Loan
Party shall so assert,  or any time prior to the  Collateral  Release Date,  any
Lien  created  by  any of the  Security  Documents  with  respect  to  Mortgaged
Properties  with an aggregate  value in excess of $50,000,000  shall cease to be
enforceable and of the same effect and priority purported to be created thereby;
or

                                       58


                (j)  the  guarantee  contained  in  SECTION  2 of the  Guarantee
Agreement  shall  cease,  for any reason,  to be in full force and effect or any
Loan Party or any Affiliate of any Loan Party shall so assert; or

                (k) (i) any  "person"  or  "group"  (as such  terms  are used in
Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended (the
"EXCHANGE ACT")),  shall become, or obtain rights (whether by means or warrants,
options or otherwise)  to become,  the  "beneficial  owner" (as defined in Rules
13(d)-3 and 13(d)-5 under the Exchange  Act),  directly or  indirectly,  of more
than 35% of the  outstanding  common  stock of the  Company;  (ii) the  board of
directors  of the Company  shall  cease to consist of a majority  of  Continuing
Directors;  (iii) the  Company  shall  cease to own and  control,  of record and
beneficially,  directly or indirectly, 100% of each class of outstanding Capital
Stock of the Borrower and each Guarantor free and clear of all Liens;  or (iv) a
Specified Change of Control shall occur;

then, and in any such event, (A) if such event is an Event of Default  specified
in clause  (i) or (ii) of  paragraph  (f) above with  respect  to the  Borrower,
automatically  the Revolving  Commitments  shall  immediately  terminate and the
Revolving Loans hereunder (with accrued interest  thereon) and all other amounts
owing under this Agreement and the other Loan  Documents  (including all amounts
of L/C  Obligations,  whether or not the  beneficiaries  of the then outstanding
Letters of Credit shall have presented the documents required  thereunder) shall
immediately become due and payable,  and (B) if such event is any other Event of
Default,  either or both of the  following  actions  may be taken:  (i) with the
consent of the Majority Lenders, either Co-Administrative Agent may, or upon the
request of the Majority Lenders, either Co-Administrative Agent shall, by notice
to the Borrower  declare the Revolving  Commitments to be terminated  forthwith,
whereupon the Revolving Commitments shall immediately  terminate;  and (ii) with
the consent of the Majority Lenders, either Co-Administrative Agent may, or upon
the request of the Majority  Lenders,  the  Co-Administrative  Agents shall,  by
notice to the Borrower,  declare the  Revolving  Loans  hereunder  (with accrued
interest thereon) and all other amounts owing under this Agreement and the other
Loan  Documents  (including all amounts of L/C  Obligations,  whether or not the
beneficiaries of the then outstanding Letters of Credit shall have presented the
documents required  thereunder) to be due and payable  forthwith,  whereupon the
same shall  immediately  become due and payable.  With respect to all Letters of
Credit with respect to which  presentment  for honor shall not have  occurred at
the time of an acceleration  pursuant to this  paragraph,  the Borrower shall at
such time Cash  Collateralize  the  aggregate L/C  Obligations.  Amounts of Cash
Collateral shall be applied by either  Co-Administrative Agent to the payment of
drafts drawn under such Letters of Credit,  and the unused portion thereof after
all such Letters of Credit shall have expired or been fully drawn upon,  if any,
shall be applied to repay other Obligations of the Borrower  hereunder and under
the other Loan Documents. After all such Letters of Credit shall have expired or
been fully drawn upon,  all L/C  Obligations  shall have been  satisfied and all
other  Obligations of the Borrower  hereunder and under the other Loan Documents
shall have been paid in full, the balance,  if any, of Cash Collateral  shall be
returned  to the  Borrower  (or such other  Person as may be  lawfully  entitled
thereto).  Except as  expressly  provided  above in this  Section,  presentment,
demand, protest and all other notices of any kind are hereby expressly waived by
the Borrower.

                             SECTION 9. THE AGENTS

          9.1.  APPOINTMENT  AND AUTHORITY.  Each of the Lenders and the Issuing
Lender hereby  irrevocably  appoints each of Union Bank of California,  N.A. and
Bank of  America,  N.A.  to act on its  behalf as the  Co-Administrative  Agents
hereunder  and  Union  Bank of  California,  N.A.  to act on its  behalf  as the
Administrative Agent hereunder and under the other Loan Documents and authorizes
each Agent to take such actions on its behalf and to exercise such powers as are
delegated  to such  Agent by the terms  hereof or  thereof,  together  with such
actions and powers as are reasonably  incidental thereto. The provisions of this
Section are solely for the  benefit of each  Agent,  the Lenders and the Issuing
Lender, and neither the Borrower nor any other Loan Party shall have rights as a
third party beneficiary of any of such provisions.

                                       59


          9.2.  RIGHTS AS A LENDER.  The Person  serving  as an Agent  hereunder
shall have the same  rights and powers in its  capacity as a Lender as any other
Lender  and may  exercise  the same as though it were not the Agent and the term
"Lender" or "Lenders" shall,  unless otherwise expressly indicated or unless the
context otherwise requires, include the Person serving as the Agent hereunder in
its individual  capacity.  Such Person and its  Affiliates  may accept  deposits
from,  lend money to,  act as the  financial  advisor  or in any other  advisory
capacity for and  generally  engage in any kind of business with the Borrower or
any Subsidiary or other  Affiliate  thereof as if such Person were not the Agent
hereunder and without any duty to account therefor to the Lenders.

          9.3.  EXCULPATORY  PROVISIONS.  The Agent shall not have any duties or
obligations  except  those  expressly  set forth  herein  and in the other  Loan
Documents. Without limiting the generality of the foregoing, the Agent:

                (a) shall  not be  subject  to any  fiduciary  or other  implied
duties, regardless of whether a Default has occurred and is continuing;

                (b) shall not have any duty to take any discretionary  action or
exercise  any  discretionary  powers,  except  discretionary  rights  and powers
expressly  contemplated  hereby or by the other Loan Documents that the Agent is
required to exercise  as  directed in writing by the  Required  Lenders (or such
other number or  percentage  of the Lenders as shall be  expressly  provided for
herein or in the other Loan  Documents),  PROVIDED  that the Agent  shall not be
required to take any action that,  in its opinion or the opinion of its counsel,
may expose the Agent to  liability  or that is contrary to any Loan  Document or
applicable law; and

                (c) shall not,  except as expressly  set forth herein and in the
other Loan Documents, have any duty to disclose, and shall not be liable for the
failure to  disclose,  any  information  relating to the  Borrower or any of its
Affiliates  that is  communicated  to or obtained  by the Person  serving as the
Agent or any of its Affiliates in any capacity.

The Agent  shall not be liable for any action  taken or not taken by it (i) with
the consent or at the request of the  Required  Lenders (or such other number or
percentage of the Lenders as shall be  necessary,  or as the Agent shall believe
in good  faith  shall be  necessary,  under the  circumstances  as  provided  in
SECTIONS 10.1 and SECTION 8) or (ii) in the absence of its own gross  negligence
or willful  misconduct.  The Agent shall be deemed not to have  knowledge of any
Default unless and until notice describing such Default is given to the Agent by
the Borrower, a Lender or the Issuing Lender.

The Agent shall not be responsible  for or have any duty to ascertain or inquire
into (i) any statement, warranty or representation made in or in connection with
this Agreement or any other Loan Document, (ii) the contents of any certificate,
report or other  document  delivered  hereunder or  thereunder  or in connection
herewith  or  therewith,  (iii)  the  performance  or  observance  of any of the
covenants,  agreements or other terms or conditions  set forth herein or therein
or  the   occurrence  of  any  Default,   (iv)  the  validity,   enforceability,
effectiveness  or genuineness of this Agreement,  any other Loan Document or any
other agreement, instrument or document or (v) the satisfaction of any condition
set forth in SECTION 5 or  elsewhere  herein,  other than to confirm  receipt of
items expressly required to be delivered to the Agent.

                                       60


          9.4.  RELIANCE BY AGENT. The Agent shall be entitled to rely upon, and
shall  not  incur  any  liability  for  relying  upon,   any  notice,   request,
certificate,   consent,  statement,   instrument,   document  or  other  writing
(including any electronic message, Internet or intranet website posting or other
distribution)  believed  by it to be genuine  and to have been  signed,  sent or
otherwise  authenticated by the proper Person.  The Agent also may rely upon any
statement made to it orally or by telephone and believed by it to have been made
by the proper Person, and shall not incur any liability for relying thereon.  In
determining compliance with any condition hereunder to the making of a Revolving
Loan, or the issuance of a Letter of Credit, that by its terms must be fulfilled
to the  satisfaction  of a Lender or the Issuing  Lender,  the Agent may presume
that such condition is  satisfactory to such Lender or the Issuing Lender unless
the Agent shall have  received  notice to the  contrary  from such Lender or the
Issuing  Lender  prior to the making of such  Revolving  Loan or the issuance of
such Letter of Credit.  The Agent may  consult  with legal  counsel  (who may be
counsel for the Borrower), independent accountants and other experts selected by
it,  and  shall  not be  liable  for any  action  taken  or not  taken  by it in
accordance with the advice of any such counsel, accountants or experts.

          9.5.  DELEGATION  OF DUTIES.  The Agent may perform any and all of its
duties and  exercise  its rights  and powers  hereunder  or under any other Loan
Document by or through any one or more sub-agents appointed by the Agent. Except
(i) in  circumstances  in which  such Agent  determines  in good faith that such
appointment  is  advisable  to  comply  with   applicable  law  or  to  avoid  a
disadvantageous economic, legal or regulatory consequence or (ii) when a Default
shall have occurred and be continuing,  any such sub-agent  shall be approved by
the Borrower,  such  approval to not be  unreasonably  withheld or delayed.  The
Agent and any such  sub-agent may perform any and all of its duties and exercise
its rights  and  powers by or through  their  respective  Related  Parties.  The
exculpatory  provisions of this SECTION 9 shall apply to any such  sub-agent and
to the Related Parties of the Agent and any such  sub-agent,  and shall apply to
their  respective  activities in connection  with the  syndication of the credit
facilities provided for herein as well as activities as Agent.

          9.6.  RESIGNATION  OF AGENT.  The Agent may at any time give notice of
its  resignation  to the  Lenders,  the Issuing  Lender and the  Borrower.  Upon
receipt of any such notice of resignation,  the Majority  Lenders shall have the
right, in consultation with the Borrower, to appoint a successor, which shall be
a bank with an office in the United  States,  or an  Affiliate  of any such bank
with an office in the United  States.  If no such  successor  shall have been so
appointed by the Majority Lenders, in consultation with the Borrower,  and shall
have accepted  such  appointment  within 30 days after the retiring  Agent gives
notice of its resignation,  then the retiring Agent may on behalf of the Lenders
and the Issuing Lender, appoint a successor Agent meeting the qualifications set
forth  above;  PROVIDED  that if the Agent  shall  notify the  Borrower  and the
Lenders that no  qualifying  Person has  accepted  such  appointment,  then such
resignation  shall  nonetheless  become effective in accordance with such notice
and (1) the retiring Agent shall be discharged  from its duties and  obligations
hereunder  and under the other Loan  Documents  (except  that in the case of any
collateral  security  held by the Agent on behalf of the  Lenders or the Issuing
Lender under any of the Loan  Documents,  the retiring  Agent shall  continue to
hold such collateral security until such time as a successor Agent is appointed)
and (2) all payments,  communications and determinations provided to be made by,
to or  through  the Agent  shall  instead  be made by or to each  Lender and the
Issuing  Lender  directly,  until such time as the  Majority  Lenders  appoint a
successor Agent as provided for above in this Section.  Upon the acceptance of a
successor's appointment as Agent hereunder,  such successor shall succeed to and
become  vested  with all of the  rights,  powers,  privileges  and duties of the
retiring (or retired) Agent, and the retiring Agent shall be discharged from all
of its duties and  obligations  hereunder or under the other Loan  Documents (if
not already  discharged  therefrom as provided above in this Section).  The fees
payable by the Borrower to a successor  Agent shall be the same as those payable
to its  predecessor  unless  otherwise  agreed  between  the  Borrower  and such
successor.  After the retiring Agent's resignation hereunder and under the other
Loan Documents, the provisions of this SECTION 9 and SECTION 10.5 shall continue
in effect for the  benefit of such  retiring  Agent,  its  sub-agents  and their
respective  Related  Parties in respect  of any  actions  taken or omitted to be
taken by any of them while the retiring Agent was acting as Agent.

          9.7.  NON-RELIANCE  ON AGENT AND OTHER  LENDERS.  Each  Lender and the
Issuing Lender acknowledges that it has, independently and without reliance upon
the Agent or any other Lender or any of their Related  Parties and based on such
documents  and  information  as it has deemed  appropriate,  made its own credit
analysis and decision to enter into this Agreement.  Each Lender and the Issuing
Lender also acknowledges  that it will,  independently and without reliance upon
the Agent or any other Lender or any of their Related  Parties and based on such
documents  and  information  as it shall  from  time to time  deem  appropriate,
continue to make its own decisions in taking or not taking action under or based
upon this  Agreement,  any other Loan  Document or any related  agreement or any
document furnished hereunder or thereunder.

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          9.8.  NO  OTHER  DUTIES,   ETC.   Anything   herein  to  the  contrary
notwithstanding,  none  of  the  Co-Book  Managers,  Joint  Lead  Arrangers,  or
Co-Documentation  Agents  listed on the cover page hereof shall have any powers,
duties  or  responsibilities  under  this  Agreement  or any of the  other  Loan
Documents,  except in its capacity, as applicable, as the Agent, a Lender or the
Issuing Lender hereunder.

          9.9.  ADMINISTRATIVE  AGENT MAY FILE  PROOFS OF CLAIM.  In case of the
pendency   of   any   receivership,    insolvency,   liquidation,    bankruptcy,
reorganization,   arrangement,   adjustment,   composition   or  other  judicial
proceeding relative to any Loan Party, the Administrative Agent (irrespective of
whether the principal of any Revolving Loan or L/C Obligation  shall then be due
and payable as herein  expressed or by declaration or otherwise and irrespective
of whether the Administrative  Agent shall have made any demand on the Borrower)
shall  be  entitled  and  empowered,  by  intervention  in  such  proceeding  or
otherwise:

                (a) to file  and  prove a claim  for  the  whole  amount  of the
principal and interest owing and unpaid in respect of the Revolving  Loans,  L/C
Obligations and all other Obligations that are owing and unpaid and to file such
other  documents as may be necessary or advisable in order to have the claims of
the Lenders,  the Issuing  Lender and the  Administrative  Agent  (including any
claim for the reasonable compensation,  expenses,  disbursements and advances of
the  Lenders,  the  Issuing  Lender  and  the  Administrative  Agent  and  their
respective agents and counsel and all other amounts due the Lenders, the Issuing
Lender and the Administrative Agent under SECTIONS 2.3, 2.7 and 10.5) allowed in
such judicial proceeding; and

                (b) to collect and receive any monies or other property  payable
or deliverable on any such claims and to distribute the same;

and any custodian,  receiver,  assignee,  trustee,  liquidator,  sequestrator or
other similar official in any such judicial  proceeding is hereby  authorized by
each Lender and the Issuing  Lender to make such payments to the  Administrative
Agent  and,  in the event that the  Administrative  Agent  shall  consent to the
making of such payments  directly to the Lenders and the Issuing Lender,  to pay
to the  Administrative  Agent any  amount due for the  reasonable  compensation,
expenses,  disbursements and advances of the Administrative Agent and its agents
and counsel,  and any other amounts due the Administrative  Agent under SECTIONS
2.3 and 10.5.

Nothing contained herein shall be deemed to authorize the  Administrative  Agent
to  authorize  or  consent  to or accept or adopt on behalf of any Lender or the
Issuing  Lender  any  plan  of   reorganization,   arrangement,   adjustment  or
composition  affecting  the  Obligations  or  the  rights  of any  Lender  or to
authorize the Administrative Agent to vote in respect of the claim of any Lender
in any such proceeding.

                           SECTION 10. MISCELLANEOUS

          10.1. AMENDMENTS AND WAIVERS.  Neither this Agreement,  any other Loan
Document,  nor any terms  hereof or  thereof  may be  amended,  supplemented  or
modified  except in accordance  with the  provisions  of this SECTION 10.1.  The
Majority Lenders and each Loan Party to the relevant Loan Document may, or, with
the written consent of the Majority Lenders,  the  Co-Administrative  Agents and
each Loan Party to the relevant Loan Document may, from time to time,  (a) enter
into written  amendments,  supplements or modifications  hereto and to the other
Loan Documents for the purpose of adding any provisions to this Agreement or the
other Loan  Documents  or changing in any manner the rights of the Lenders or of
the Loan  Parties  hereunder  or  thereunder  or (b)  waive,  on such  terms and
conditions as the Majority Lenders or the Co-Administrative  Agents, as the case
may  be,  may  specify  in  such  instrument,  any of the  requirements  of this
Agreement or the other Loan Documents or any Default or Event of Default and its
consequences;  PROVIDED,  HOWEVER,  that no such  waiver and no such  amendment,
supplement or modification  shall (i) forgive the principal amount or extend the
final scheduled date of maturity of any Revolving  Loan,  reduce the stated rate
of any interest or fee payable  hereunder  (except in connection with the waiver
of applicability of any  post-default  increase in interest rates,  which waiver
shall be  effective  with the  consent of the  Majority  Lenders)  or extend the
scheduled  date of any payment  thereof,  or  increase  the amount or extend the
expiration date of any Lender's Revolving  Commitment,  in each case without the
written  consent of each Lender  directly  affected  thereby;  (ii) eliminate or
reduce the voting  rights of any Lender  under this  SECTION  10.1  without  the
written  consent of such Lender;  (iii) reduce any  percentage  specified in the


                                       62


definition of Required Lenders,  Majority Lenders,  consent to the assignment or
transfer  by the  Borrower  of any of its  rights  and  obligations  under  this
Agreement and the other Loan Documents,  release all or substantially all of the
Collateral,  other than in  connection  with the  Collateral  Release  Date,  or
release all or substantially  all of the Guarantors from their obligations under
the  Guarantee  Agreement,  in each case  without  the  written  consent  of all
Lenders;  (iv) (A)  increase the  Borrowing  Base without the consent of Lenders
holding more than 90% of the Total Revolving  Commitments then in effect, or, if
the Revolving  Commitments have been terminated,  the Total Revolving Extensions
of Credit  then  outstanding  , (B)  reduce  the  Borrowing  Base or change  the
Collateral  Coverage Ratio required under SECTION 3.2(A), in each case,  without
the consent of the Required  Lenders or (C)  otherwise  amend or waive any other
provision of SECTION  2.14 or 3.2 without the consent of the  Required  Lenders;
(v)  amend,  modify or waive any  provision  of  SECTION 9 without  the  written
consent of each Agent adversely  affected thereby;  (vi) amend,  modify or waive
any  provision  of SECTIONS  2.5 to 2.12  without  the  written  consent of each
Issuing  Lender;  or (vii)  amend,  modify or waive any  provisions  of  SECTION
10.7(A) with out the written  consent of each affected  Lender.  Any such waiver
and any such amendment,  supplement or modification  shall apply equally to each
of the Lenders and shall be binding  upon the Loan  Parties,  the  Lenders,  the
Agents and all future holders of the Revolving Loans. In the case of any waiver,
the Loan  Parties,  the Lenders and the Agents shall be restored to their former
position  and  rights  hereunder  and under the other  Loan  Documents,  and any
Default  or  Event  of  Default  waived  shall be  deemed  to be  cured  and not
continuing;  but no such waiver shall extend to any  subsequent or other Default
or Event of Default, or impair any right consequent  thereon.  Co-Administrative
Agents may, without the consent of any Lender,  enter into any Security Document
or any  amendment,  waiver,  or release to the extent  necessary  to provide for
additional  Collateral as  contemplated by any provision of this Agreement or to
provide for the release of  Collateral  to the extent  permitted by the terms of
this Agreement.

          10.2. NOTICES; EFFECTIVENESS; ELECTRONIC COMMUNICATION.

                (a) NOTICES  GENERALLY.  Except in the case of notices and other
communications  expressly  permitted  to be given by  telephone  (and  except as
provided in subsection (b) below), all notices and other communications provided
for  herein  shall be in writing  and shall be  delivered  by hand or  overnight
courier service, mailed by certified or registered mail or sent by telecopier as
follows, and all notices and other communications  expressly permitted hereunder
to be given by telephone shall be made to the applicable  telephone  number,  as
follows:

                (i) if to the  Borrower,  the  Co-Administrative  Agents  or the
Issuing Lender, to the address,  telecopier  number,  electronic mail address or
telephone number specified for such Person on SCHEDULE 10.2; and

                (ii) if to any other Lender, to the address,  telecopier number,
electronic  mail address or  telephone  number  specified in its  Administrative
Questionnaire.

Notices sent by hand or  overnight  courier  service,  or mailed by certified or
registered mail, shall be deemed to have been given when received;  notices sent
by telecopier  shall be deemed to have been given when sent (except that, if not
given during normal  business hours for the  recipient,  shall be deemed to have
been  given  at the  opening  of  business  on the  next  business  day  for the
recipient).  Notices delivered through  electronic  communications to the extent
provided  in SECTION  10.2(B)  below,  shall be  effective  as  provided in such
SECTION 10.2(B).

                (b) ELECTRONIC COMMUNICATIONS.  Notices and other communications
to the Lenders and the Issuing Lender hereunder may be delivered or furnished by
electronic  communication  (including e-mail and Internet or intranet  websites)
pursuant to procedures approved by the Administrative  Agent,  provided that the
foregoing  shall not  apply to  notices  to any  Lender  or the  Issuing  Lender
pursuant to SECTION 2 if such Lender or the Issuing Lender,  as applicable,  has
notified the Co-Administrative  Agents that it is incapable of receiving notices
under such Section by electronic communication.  The Co-Administrative Agents or
the  Borrower  may,  in their  discretion,  agree to  accept  notices  and other
communications  to them  hereunder  by  electronic  communications  pursuant  to
procedures  approved by them,  provided that approval of such  procedures may be
limited to particular notices or communications.

Unless the Co-Administrative  Agents otherwise prescribe,  (i) notices and other
communications  sent to an  e-mail  address  shall be deemed  received  upon the
sender's receipt of an  acknowledgement  from the intended recipient (such as by
the "return receipt requested"  function,  as available,  return e-mail or other
written acknowledgement), provided that if such notice or other communication is
not sent  during the normal  business  hours of the  recipient,  such  notice or
communication  shall be deemed to have been sent at the  opening of  business on
the next  business day for the  recipient,  and (ii)  notices or  communications
posted to an Internet  or intranet  website  shall be deemed  received  upon the
deemed  receipt by the intended  recipient at its e-mail address as described in
the foregoing  clause (i) of notification  that such notice or  communication is
available and identifying the website address therefor.

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                (c) THE  PLATFORM.  THE  PLATFORM  IS  PROVIDED  "AS IS" AND "AS
AVAILABLE."  THE AGENT PARTIES (AS DEFINED BELOW) DO NOT WARRANT THE ACCURACY OR
COMPLETENESS  OF THE BORROWER  MATERIALS OR THE  ADEQUACY OF THE  PLATFORM,  AND
EXPRESSLY  DISCLAIM  LIABILITY  FOR  ERRORS IN OR  OMISSIONS  FROM THE  BORROWER
MATERIALS. NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR STATUTORY, INCLUDING 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
ANY AGENT PARTY IN CONNECTION WITH THE BORROWER MATERIALS OR THE PLATFORM. In no
event  shall  the  Co-Administrative  Agents  or any of  their  Related  Parties
(collectively,  the "AGENT  PARTIES")  have any liability to the  Borrower,  any
Lender,  the Issuing  Lender or any other  Person for losses,  claims,  damages,
liabilities  or expenses of any kind  (whether in tort,  contract or  otherwise)
arising out of the Borrower's or the  Co-Administrative  Agents' transmission of
Borrower Materials through the Internet,  except to the extent that such losses,
claims, damages,  liabilities or expenses are determined by a court of competent
jurisdiction  by a final and  nonappealable  judgment to have  resulted from the
gross negligence or willful misconduct of such Agent Party;  PROVIDED,  HOWEVER,
that in no event shall any Agent Party have any liability to the  Borrower,  any
Lender,  the  Issuing  Lender  or  any  other  Person  for  indirect,   special,
incidental,  consequential  or punitive  damages (as opposed to direct or actual
damages).

                (d)  CHANGE  OF  ADDRESS,   ETC.  Each  of  the  Borrower,   the
Co-Administrative  Agents  and  the  Issuing  Lender  may  change  its  address,
telecopier or telephone number for notices and other communications hereunder by
notice to the other  parties  hereto.  Each other Lender may change its address,
telecopier or telephone number for notices and other communications hereunder by
notice to the Borrower, the Co-Administrative  Agents and the Issuing Lender. In
addition, each Lender agrees to notify the Co-Administrative Agents from time to
time to ensure that the Co-Administrative Agents have on record (i) an effective
address,  contact name, telephone number,  telecopier number and electronic mail
address to which notices and other  communications may be sent and (ii) accurate
wire instructions for such Lender.

                (e) RELIANCE BY  CO-ADMINISTRATIVE  AGENTS,  ISSUING  LENDER AND
LENDERS. The Co-Administrative  Agents, the Issuing Lender and the Lenders shall
be  entitled to rely and act upon any notices  (including  telephonic  borrowing
notices)  purportedly  given by or on  behalf of the  Borrower  even if (i) such
notices were not made in a manner specified herein,  were incomplete or were not
preceded or followed by any other form of notice specified  herein,  or (ii) the
terms  thereof,  as understood by the  recipient,  varied from any  confirmation
thereof. The Borrower shall indemnify the Co-Administrative  Agents, the Issuing
Lender,  each  Lender and the  Related  Parties of each of them from all losses,
costs,  expenses and  liabilities  resulting from the reliance by such Person on
each notice  purportedly  given by or on behalf of the Borrower.  All telephonic
notices to and other telephonic communications with the Co-Administrative Agents
may be recorded by the Co-Administrative  Agents, and each of the parties hereto
hereby consents to such recording.

          10.3. NO WAIVER;  CUMULATIVE  REMEDIES.  No failure to exercise and no
delay in exercising,  on the part of any Agent or any Lender, any right, remedy,
power or privilege  hereunder or under the other Loan Documents shall operate as
a waiver thereof; nor shall any single or partial exercise of any right, remedy,
power or privilege  hereunder  preclude any other or further exercise thereof or
the  exercise  of any other  right,  remedy,  power or  privilege.  The  rights,
remedies, powers and privileges herein provided are cumulative and not exclusive
of any rights, remedies, powers and privileges provided by law.

          10.4. SURVIVAL OF REPRESENTATIONS AND WARRANTIES.  All representations
and warranties made hereunder,  in the other Loan Documents and in any document,
certificate or statement  delivered  pursuant  hereto or in connection  herewith
shall survive the execution and delivery of this Agreement and the making of the
Revolving Loans and other extensions of credit hereunder.

          10.5. EXPENSES; INDEMNIFICATION; DAMAGE WAIVER.

                (a)  COSTS  AND  EXPENSES.   The  Borrower  shall  pay  (i)  all
reasonable out of pocket expenses incurred by the  Co-Administrative  Agents and
their Affiliates  (including the reasonable fees,  charges and  disbursements of
counsel for the Co-Administrative Agents), in connection with the syndication of
the  credit  facilities  provided  for  herein,  the  preparation,  negotiation,
execution,  delivery and  administration  of this  Agreement  and the other Loan
Documents or any amendments,  modifications or waivers of the provisions  hereof
or thereof (whether or not the transactions contemplated hereby or thereby shall
be  consummated),  (ii) all  reasonable out of pocket  expenses  incurred by the
Issuing Lender in connection with the issuance,  amendment, renewal or extension
of any Letter of Credit or any demand for payment  thereunder  and (iii) all out


                                       64


of pocket expenses incurred by the  Co-Administrative  Agents, any Lender or the
Issuing Lender (including the fees, charges and disbursements of any counsel for
the  Administrative  Agent,  any Lender or the Issuing  Lender),  including  the
allocated  cost of internal  counsel,  in  connection  with the  enforcement  or
protection  of its rights (A) in  connection  with this  Agreement and the other
Loan  Documents,  including its rights under this Section,  or (B) in connection
with the Revolving Loans made or Letters of Credit issued  hereunder,  including
all such out of pocket expenses  incurred during any workout,  restructuring  or
negotiations in respect of such Revolving Loans or Letters of Credit.

                (b)   INDEMNIFICATION  BY  THE  BORROWER.   The  Borrower  shall
indemnify the Co-Administrative  Agents (and any sub-agent thereof), each Lender
and the Issuing Lender,  and each Related Party of any of the foregoing  Persons
(each  such  Person  being  called  an  "INDEMNITEE")  against,  and  hold  each
Indemnitee harmless from, any and all losses, claims,  damages,  liabilities and
related expenses  (including the fees,  charges and disbursements of any counsel
for any Indemnitee),  including the allocated cost of internal counsel, incurred
by any  Indemnitee or asserted  against any  Indemnitee by any third party or by
the Borrower or any other Loan Party arising out of, in connection with, or as a
result of (i) the  execution  or  delivery  of this  Agreement,  any other  Loan
Document or any  agreement or  instrument  contemplated  hereby or thereby,  the
performance by the parties hereto of their respective  obligations  hereunder or
thereunder, the consummation of the transactions contemplated hereby or thereby,
or, in the case of the Co-Administrative  Agents (and any sub-agent thereof) and
its Related  Parties only,  the  administration  of this Agreement and the other
Loan  Documents,  (ii) any  Revolving  Loan or  Letter  of  Credit or the use or
proposed use of the  proceeds  therefrom  (including  any refusal by the Issuing
Lender to honor a demand for payment  under a Letter of Credit if the  documents
presented in connection  with such demand do not strictly  comply with the terms
of such  Letter of Credit),  (iii) any actual or alleged  presence or release of
hazardous  materials on or from any  property  owned or operated by the Company,
the  Borrower  or any of  their  Subsidiaries,  or any  environmental  liability
related in any way to the Company, the Borrower or any of their Subsidiaries, or
(iv) any actual or prospective  claim,  litigation,  investigation or proceeding
relating to any of the foregoing,  whether based on contract,  tort or any other
theory,  whether  brought by a third party or by the  Borrower or any other Loan
Party,  and  regardless  of whether any  Indemnitee is a party  thereto,  IN ALL
CASES,  WHETHER OR NOT  CAUSED BY OR  ARISING,  IN WHOLE OR IN PART,  OUT OF THE
COMPARATIVE,  CONTRIBUTORY OR SOLE  NEGLIGENCE OF THE INDEMNITEE;  PROVIDED that
such indemnity shall not, as to any Indemnitee,  be available to the extent that
such losses, claims, damages, liabilities or related expenses (x) are determined
by a court of competent jurisdiction by final and nonappealable judgment to have
resulted from the gross  negligence or willful  misconduct of such Indemnitee or
(y) result from a claim  brought by the Borrower or any other Loan Party against
an Indemnitee for breach in bad faith of such Indemnitee's obligations hereunder
or under  any other  Loan  Document,  if the  Borrower  or such  Loan  Party has
obtained  a final  and  nonappealable  judgment  in its  favor on such  claim as
determined by a court of competent jurisdiction.

                (c)  REIMBURSEMENT  BY LENDERS.  To the extent that the Borrower
for any reason fails to indefeasibly  pay any amount  required under  subsection
(a) or (b) of this Section to be paid by it to the Co-Administrative  Agents (or
any sub-agent  thereof),  the Issuing  Lender or any Related Party of any of the
foregoing,  each Lender severally agrees to pay to the Co-Administrative  Agents
(or any such  sub-agent),  the Issuing Lender or such Related Party, as the case
may be, such Lender's Applicable Exposure Percentage  (determined as of the time
that the applicable unreimbursed expense or indemnity payment is sought) of such
unpaid  amount,  provided that the  unreimbursed  expense or  indemnified  loss,
claim, damage, liability or related expense, as the case may be, was incurred by
or asserted against the Co-Administrative  Agents (or any such sub-agent) or the
Issuing  Lender in its capacity as such,  or against any Related Party of any of
the foregoing acting for the Co-Administrative Agents (or any such sub-agent) or
Issuing Lender in connection with such capacity.

                (d) WAIVER OF CONSEQUENTIAL  DAMAGES, ETC. To the fullest extent
permitted by applicable  law, the Borrower shall not assert,  and hereby waives,
any claim  against any  Indemnitee,  on any theory of  liability,  for  special,
indirect,  consequential  or  punitive  damages  (as opposed to direct or actual
damages)  arising out of, in connection with, or as a result of, this Agreement,
any other Loan Document or any agreement or instrument  contemplated hereby, the
transactions  contemplated  hereby or thereby,  any Revolving  Loan or Letter of
Credit  or  the  use of the  proceeds  thereof.  No  Indemnitee  referred  to in
subsection  (b) above  shall be liable for any damages  arising  from the use by
unintended  recipients of any information or other  materials  distributed by it
through telecommunications, electronic or other information transmission systems
in  connection   with  this  Agreement  or  the  other  Loan  Documents  or  the
transactions contemplated hereby or thereby.

                (e)  PAYMENTS.  All  amounts  due under  this  Section  shall be
payable not later than ten Business Days after demand therefor.

                (f) SURVIVAL.  The  agreements in this Section shall survive the
resignation of an  Administrative  Agent and Issuing Lender,  the replacement of
any Lender,  the  termination  of the Revolving  Commitments  and the repayment,
satisfaction or discharge of all the other Obligations.

                                       65


          10.6. SUCCESSORS AND ASSIGNS; PARTICIPATIONS AND ASSIGNMENTS

                (a)  SUCCESSORS  AND ASSIGNS  GENERALLY.  The provisions of this
Agreement  shall be binding upon and inure to the benefit of the parties  hereto
and their  respective  successors  and  assigns  permitted  hereby,  except that
neither the Borrower  nor any other Loan Party may assign or otherwise  transfer
any of its rights or obligations  hereunder without the prior written consent of
the  Co-Administrative  Agents  and each  Lender  and no  Lender  may  assign or
otherwise  transfer any of its rights or obligations  hereunder except (i) to an
Eligible  Assignee in accordance  with the  provisions of subsection (b) of this
Section,  (ii) by way of  participation  in  accordance  with the  provisions of
subsection  (d) of this  Section,  or (iii) by way of pledge or  assignment of a
security  interest subject to the restrictions of subsection (f) of this Section
(and any other  attempted  assignment  or transfer by any party  hereto shall be
null and void).  Nothing  in this  Agreement,  expressed  or  implied,  shall be
construed  to confer  upon any Person  (other  than the  parties  hereto,  their
respective  successors and assigns permitted hereby,  Participants to the extent
provided  in  subsection  (d) of  this  Section  and,  to the  extent  expressly
contemplated  hereby,  the  Related  Parties  of each  of the  Co-Administrative
Agents,  the Issuing  Lenders and the  Lenders)  any legal or  equitable  right,
remedy or claim under or by reason of this Agreement.

                (b) ASSIGNMENTS BY LENDERS. Any Lender may at any time assign to
one or more  Eligible  Assignee  all or a portion of its rights and  obligations
under this Agreement (including all or a portion of its Revolving Commitment and
the  Revolving   Loans   (including  for  purposes  of  this   subsection   (b),
participations in L/C Obligations) at the time owing to it); PROVIDED that

                (i) except in the case of an assignment of the entire  remaining
     amount of the assigning  Lender's  Revolving  Commitment  and the Revolving
     Loans at the time owing to it or in the case of an  assignment  to a Lender
     or an Affiliate  of a Lender or an Approved  Fund with respect to a Lender,
     the aggregate  amount of the Revolving  Commitment  (which for this purpose
     includes  Revolving  Loans  outstanding  thereunder)  or, if the  Revolving
     Commitment is not then in effect, the principal  outstanding balance of the
     Revolving  Loans of the assigning  Lender subject to each such  assignment,
     determined as of the date the  Assignment  and  Assumption  with respect to
     such  assignment  is delivered to the  Co-Administrative  Agents or, if the
     "Trade Date" is specified in the Assignment and Assumption, as of the Trade
     Date,  shall  not be less  than  $10,000,000  (or in the case of a  Lender,
     $5,000,000) unless each of the Co-Administrative  Agents and, so long as no
     Event of Default has occurred  and is  continuing,  the Borrower  otherwise
     consents (each such consent not to be unreasonably withheld or delayed);

                (ii) each partial assignment shall be made as an assignment of a
     proportionate  part of all the assigning  Lender's  rights and  obligations
     under this Agreement  with respect to the Revolving  Loans or the Revolving
     Commitment assigned;

                (iii) any  assignment  of a  Commitment  must be approved by the
     Co-Administrative Agents, and the Issuing Lenders unless the Person that is
     the  proposed  assignee  is itself a Lender  (whether  or not the  proposed
     assignee would otherwise qualify as an Eligible Assignee); and

                (iv) the parties to each assignment shall execute and deliver to
     the Co-Administrative Agents an Assignment and Assumption,  together with a
     processing and recordation fee of $3,500, and the Eligible Assignee,  if it
     shall not be a Lender,  shall  deliver to the  Co-Administrative  Agents an
     Administrative Questionnaire.

Subject to acceptance  and  recording  thereof by the  Co-Administrative  Agents
pursuant to subsection  (c) of this Section,  from and after the effective  date
specified in each Assignment and Assumption,  the Eligible  Assignee  thereunder
shall be a party to this Agreement  and, to the extent of the interest  assigned
by such Assignment and  Assumption,  have the rights and obligations of a Lender
under this Agreement,  and the assigning Lender  thereunder shall, to the extent
of the interest assigned by such Assignment and Assumption, be released from its
obligations  under  this  Agreement  (and,  in the  case  of an  Assignment  and
Assumption  covering all of the assigning  Lender's rights and obligations under
this Agreement, such Lender shall cease to be a party hereto) but shall continue
to be entitled to the benefits of SECTIONS  3.1, 3.4, 3.5, and 10.4 with respect
to  facts  and  circumstances  occurring  prior  to the  effective  date of such
assignment.  Upon  request,  the  Borrower (at its  expense)  shall  execute and
deliver a Note to the assignee Lender. Any assignment or transfer by a Lender of
rights or  obligations  under  this  Agreement  that does not  comply  with this

                                       66


subsection  shall be treated for  purposes of this  Agreement  as a sale by such
Lender of a  participation  in such rights and  obligations  in accordance  with
subsection (d) of this Section.

                (c) REGISTER.  The  Co-Administrative  Agents, acting solely for
this   purpose   as  an  agent  of  the   Borrower,   shall   maintain   at  the
Co-Administrative  Agents'  office  a copy of  each  Assignment  and  Assumption
delivered to it and a register for the recordation of the names and addresses of
the Lenders,  and the Revolving  Commitments  of, and  principal  amounts of the
Revolving Loans and L/C Obligations  owing to, each Lender pursuant to the terms
hereof from time to time (the "REGISTER").  The entries in the Register shall be
conclusive,  and the Borrower, the Co-Administrative  Agents and the Lenders may
treat each Person whose name is recorded in the  Register  pursuant to the terms
hereof as a Lender hereunder for all purposes of this Agreement, notwithstanding
notice to the contrary.  The Register  shall be available for inspection by each
of the Borrower and the Issuing Lender at any  reasonable  time and from time to
time upon reasonable prior notice. In addition, at any time that a request for a
consent for a material or  substantive  change to the Loan Documents is pending,
any Lender may request and receive from the  Co-Administrative  Agents a copy of
the Register.

                (d)  PARTICIPATIONS.  Any  Lender may at any time,  without  the
consent of, or notice to, the  Borrower or the  Co-Administrative  Agents,  sell
participations to any Person (other than a natural person or the Borrower or any
of the Borrower's  Affiliates)  (each, a  "PARTICIPANT")  in all or a portion of
such Lender's rights and/or obligations under this Agreement (including all or a
portion of its Revolving  Commitment  and/or the Revolving Loans (including such
Lender's participations in L/C Obligations) owing to it); provided that (i) such
Lender's  obligations  under this Agreement  shall remain  unchanged,  (ii) such
Lender shall  remain  solely  responsible  to the other  parties  hereto for the
performance of such  obligations and (iii) the Borrower,  the  Co-Administrative
Agents,  the Lenders and the Issuing  Lenders shall  continue to deal solely and
directly  with  such  Lender  in  connection   with  such  Lender's  rights  and
obligations under this Agreement.

Any  agreement  or   instrument   pursuant  to  which  a  Lender  sells  such  a
participation  shall  provide  that such Lender  shall  retain the sole right to
enforce this Agreement and to approve any amendment,  modification  or waiver of
any provision of this Agreement;  PROVIDED that such agreement or instrument may
provide that such Lender will not, without the consent of the Participant, agree
to any amendment,  waiver or other  modification  described in clause (i) of the
first  proviso  to  SECTION  10.1 that  affects  such  Participant.  Subject  to
subsection (e) of this Section,  the Borrower agrees that each Participant shall
be entitled to the benefits of SECTIONS 3.9, 3.10 and 3.11 to the same extent as
if it were a Lender and had  acquired  its  interest by  assignment  pursuant to
subsection (b) of this Section. To the extent permitted by law, each Participant
also shall be  entitled  to the  benefits  of  SECTION  10.7 as though it were a
Lender, PROVIDED such Participant agrees to be subject to SECTION 3.16 as though
it were a Lender.

                (e) LIMITATIONS UPON PARTICIPANT RIGHTS. A Participant shall not
be entitled to receive any greater  payment  under  SECTION 3.9 or 3.10 than the
applicable  Lender  would  have been  entitled  to receive  with  respect to the
participation sold to such Participant,  unless the sale of the participation to
such  Participant  is  made  with  the  Borrower's  prior  written  consent.   A
Participant  that  would be a Foreign  Lender  if it were a Lender  shall not be
entitled to the  benefits of SECTION 3.10 unless the Borrower is notified of the

participation  sold to such  Participant and such  Participant  agrees,  for the
benefit of the Borrower, to comply with SECTION 3.10 as though it were a Lender.

                (f) CERTAIN PLEDGES. Any Lender may at any time pledge or assign
a security  interest  in all or any portion of its rights  under this  Agreement
(including  under  its  Note,  if any) to  secure  obligations  of such  Lender,
including any pledge or assignment to secure  obligations  to a Federal  Reserve
Bank;  provided that no such pledge or assignment shall release such Lender from
any of its obligations  hereunder or substitute any such pledgee or assignee for
such Lender as a party hereto.

                (g) ELECTRONIC EXECUTION OF ASSIGNMENTS.  The words "execution,"
"signed," "signature," and words of like import in any Assignment and Assumption
shall be deemed to include  electronic  signatures  or the keeping of records in
electronic  form,  each of which shall be of the same legal effect,  validity or
enforceability  as a manually  executed  signature  or the use of a  paper-based
recordkeeping  system,  as the case may be, to the extent and as provided for in
any applicable law,  including the Federal  Electronic  Signatures in Global and
National Commerce Act, the New York State Electronic Signatures and Records Act,
or any other  similar  state laws based on the Uniform  Electronic  Transactions
Act.

                                       67


          10.7. SET-OFF.  In addition to any rights and  remedies of the Lenders
provided by law,  each Lender shall have the right,  without prior notice to the
Company or the Borrower,  any such notice being expressly  waived by the Company
and the Borrower to the extent  permitted  by  applicable  law,  upon any amount
becoming  due and payable by the Company or the Borrower  hereunder  (whether at
the stated maturity,  by acceleration or otherwise),  to set off and appropriate
and apply against such amount any and all deposits (general or special,  time or
demand,  provisional  or  final),  in  any  currency,  and  any  other  credits,
indebtedness  or  claims,  in any  currency,  in each  case  whether  direct  or
indirect,  absolute or  contingent,  matured or  unmatured,  at any time held or
owing by such Lender or any branch or agency thereof to or for the credit or the
account of the Company or the  Borrower,  as the case may be. Each Lender agrees
promptly  to notify the  Borrower  and the  Administrative  Agent after any such
setoff and  application  made by such Lender,  provided that the failure to give
such notice shall not affect the validity of such setoff and application.

          10.8. COUNTERPARTS.  This Agreement may be executed by one or more of
the parties to this Agreement on any number of separate counterparts, and all of
said counterparts  taken together shall be deemed to constitute one and the same
instrument.  Delivery  of an  executed  signature  page  of  this  Agreement  by
facsimile  transmission  shall be effective  as delivery of a manually  executed
counterpart  hereof.  A set of the  copies of this  Agreement  signed by all the
parties shall be lodged with the Borrower and the Administrative Agent.

          10.9. SEVERABILITY. Any provision of this Agreement that is prohibited
or  unenforceable  in  any  jurisdiction  shall,  as to  such  jurisdiction,  be
ineffective  to the  extent  of such  prohibition  or  unenforceability  without
invalidating  the  remaining  provisions  hereof,  and any such  prohibition  or
unenforceability   in  any   jurisdiction   shall  not   invalidate   or  render
unenforceable such provision in any other jurisdiction.


          10.10. INTEGRATION.  This  Agreement  and the  other  Loan  Documents
represent the entire agreement of the Company, the Borrower,  the Agents and the
Lenders with respect to the subject matter hereof and thereof,  and there are no
promises, undertakings, representations or warranties by any Agent or any Lender
relative to subject  matter hereof not expressly set forth or referred to herein
or in the other  Loan  Documents.  THIS  WRITTEN  AGREEMENT  AND THE OTHER  LOAN
DOCUMENTS  REPRESENT  THE FINAL  AGREEMENT  BETWEEN  THE  PARTIES AND MAY NOT BE
CONTRADICTED  BY  EVIDENCE  OF  PRIOR,   CONTEMPORANEOUS,   OR  SUBSEQUENT  ORAL
AGREEMENTS OF THE PARTIES.

THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

          10.11. GOVERNING LAW. THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF
THE  PARTIES  UNDER THIS  AGREEMENT  SHALL BE  GOVERNED  BY, AND  CONSTRUED  AND
INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF TEXAS.

          10.12.  SUBMISSION TO JURISDICTION;  WAIVERS.  Each of the Company and
the Borrower hereby irrevocably and unconditionally:

                (a) submits for itself and its  property in any legal  action or
proceeding  relating to this  Agreement and the other Loan Documents to which it
is a party,  or for  recognition  and  enforcement  of any  judgment  in respect
thereof, to the non-exclusive general jurisdiction of the courts of the State of
Texas,  the courts of the United States for the Northern  District of Texas, and
appellate courts from any thereof;

                                       68


                (b) consents that any such action or  proceeding  may be brought
in such courts and waives any objection that it may now or hereafter have to the
venue of any such action or  proceeding in any such court or that such action or
proceeding was brought in an inconvenient court and agrees not to plead or claim
the same;

                (c)  agrees  that  service  of  process  in any such  action  or
proceeding  may be effected by mailing a copy thereof by registered or certified
mail (or any  substantially  similar  form of  mail),  postage  prepaid,  to the
Company or the Borrower, as the case may be at its address set forth on SCHEDULE
10.2 or at such other address of which the  Co-Administrative  Agents shall have
been notified pursuant thereto;

                (d) agrees that nothing  herein shall affect the right to effect
service of process in any other manner permitted by law or shall limit the right
to sue in any other jurisdiction; and

                (e) waives,  to the maximum  extent not  prohibited  by law, any
right it may have to claim or recover in any legal action or proceeding referred
to in this Section any special, exemplary, punitive or consequential damages.

          10.13.  ACKNOWLEDGMENTS.  Each of the Company and the Borrower  hereby
acknowledges that:

                (a) it has been advised by counsel in the negotiation, execution
and delivery of this Agreement and the other Loan Documents;

                (b) no Agent or Lender has any  fiduciary  relationship  with or
duty to the Company or the Borrower  arising out of or in  connection  with this
Agreement or any of the other Loan Documents,  and the relationship  between the
Agents and Lenders, on one hand, and the Company and the Borrower,  on the other
hand, in connection herewith or therewith is solely that of creditor and debtor;
and

                (c) no joint  venture  is  created  hereby or by the other  Loan
Documents or otherwise exists by virtue of the transactions  contemplated hereby
among the Lenders or among the Company, the Borrower and the Lenders.

          10.14. RELEASES OF GUARANTEES AND LIENS; DESIGNATION OF SUBSIDIARIES.

                (a) Notwithstanding anything to the contrary contained herein or
in any other  Loan  Document,  the  Administrative  Agent is hereby  irrevocably
authorized by each Lender  (without  requirement  of notice to or consent of any
Lender  except  as  expressly  required  by  SECTION  10.1) to take  any  action
requested  by the  Borrower  having the effect of releasing  any  Collateral  or
guarantee  obligations (i) to the extent necessary to permit consummation of any
transaction not prohibited by any Loan Document or that has been consented to in
accordance  with  SECTION  10.1 or  (ii) to  release  Collateral  to the  extent
provided in  paragraph  (c) of this  SECTION  10.14 or (iii) at such time as the
Revolving  Loans, the L/C Obligations and the other  obligations  under the Loan
Documents (other than obligations under or in respect of Hedge Agreements) shall
have been paid in full, the Revolving  Commitments  have been  terminated and no
Letters of Credit  shall be  outstanding.  In  connection  with the  releases of
Collateral and guarantee  obligations  under subpart (iii) of this Section,  the
Collateral  shall be released from the Liens created by the Security  Documents,
and the  Security  Documents  and all  obligations  (other than those  expressly
stated to survive such  termination) of the  Administrative  Agent and each Loan
Party under the Security Documents shall terminate,  all without delivery of any
instrument or performance of any act by any Person.

                (b) Notwithstanding anything to the contrary contained herein or
in any other Loan  Document,  in the event  that,  after the Closing  Date,  the
Borrower shall designate a Subsidiary Guarantor or any newly created or acquired
Subsidiary as an "Unrestricted Subsidiary" under the Indentures,  and so long as
the  Unrestricted  Subsidiary  Investment  resulting  from such  designation  is
permitted  under  SECTION  7.7(G) (and a  Responsible  Officer has  certified in
writing thereto to the Administrative Agent), the Administrative Agent is hereby
irrevocably  authorized  by each  Lender  (without  requirement  of notice to or
consent of any Lender except as expressly  required by SECTION 10.1) to take any
action  requested by the Borrower  having the effect of releasing  any guarantee
obligations  of any such  Subsidiary  Guarantor  or newly  created  or  acquired
Subsidiary that has been so designated.

                                       69


                (c) The  Administrative  Agent  may  release  a  portion  of the
Collateral  from time to time without notice to or consent of any Lender so long
as (i) no Default or Event of Default has  occurred and is  continuing,  (ii) no
Borrowing  Base  Deficiency  shall  exist and (iii) the  aggregate  value of the
Collateral   released  in  the  period  between  any  two  regular   semi-annual

Determination  Dates on which the Collateral  Value is designated (or the period
between the last regular semi-annual  Determination Date on which the Collateral
Value  is  designated  in the  Revolving  Commitment  Period  and the  Revolving
Termination  Date) including any Collateral  released  pursuant to a Disposition
permitted under SECTION 7.5 shall not exceed the sum of (A) the amount,  if any,
by which the Collateral Value most recently designated exceeded 150% of the then
effective  Borrowing Base plus (B) $25,000,000.  The Administrative  Agent shall
release  Collateral  pursuant  to this  paragraph  (c) only  upon,  and shall be
protected  in relying  upon,  a  certificate  of Borrower to the effect that the
conditions of the preceding sentence exist with respect to the requested release
of Collateral.

          10.15.  CONFIDENTIALITY.  Each  of the  Agents,  the  Lenders  and the
Issuing  Lenders agree to maintain the  confidentiality  of the  Information (as
defined below),  except that  Information may be disclosed (a) to its Affiliates
and to  its  and  its  Affiliates'  respective  partners,  directors,  officers,
employees,  agents,  advisors and  representatives (it being understood that the
Persons to whom such  disclosure  is made will be informed  of the  confidential
nature  of  such   Information   and   instructed   to  keep  such   Information
confidential),   (b)  to  the  extent  requested  by  any  regulatory  authority
purporting  to  have  jurisdiction   over  it  (including  any   self-regulatory
authority, such as the National Association of Insurance Commissioners),  (c) to
the extent  required by  applicable  laws or  regulations  or by any subpoena or
similar legal process, (d) to any other party hereto, (e) in connection with the
exercise  of any  remedies  hereunder  or under any other Loan  Document  or any
action or  proceeding  relating to this  Agreement or any other Loan Document or
the enforcement of rights  hereunder or thereunder,  (f) subject to an agreement
containing  provisions  substantially the same as those of this Section,  to (i)
any assignee of or Participant in, or any prospective assignee of or Participant
in, any of its rights or obligations  under this Agreement or (ii) any actual or
prospective counterparty (or its advisors) to any swap or derivative transaction
relating  to the  Borrower  and its  obligations,  (g) with the  consent  of the
Borrower or (h) to the extent such  Information (x) becomes  publicly  available
other than as a result of a breach of this  Section or (y) becomes  available to
any Agent, any Lender, any Issuing Lender or any of their respective  Affiliates
on a nonconfidential  basis from a source other than a Group Member, unless such
Agent, Lender, Issuing Lender or Affiliate has actual knowledge that such source
owes  an  obligation  of  confidence  to a Group  Member  with  respect  to such
Information.  For purposes of this Section,  "Information" means all information
received  from the  Company,  the  Borrower  or any  Subsidiary  relating to the
Company,  the Borrower or any Subsidiary or any of their respective  businesses,
other than any such  information  that is available to any Agent,  any Lender or
any  Issuing  Lender  on a  nonconfidential  basis  prior to  disclosure  by the
Company,  the  Borrower  or  any  Subsidiary,  PROVIDED  that,  in the  case  of
information  received from the Company, the Borrower or any Subsidiary after the
date hereof,  such information is clearly  identified at the time of delivery as
confidential. Any Person required to maintain the confidentiality of Information
as  provided in this  Section  shall be  considered  to have  complied  with its
obligation  to do so if such  Person has  exercised  the same  degree of care to
maintain the  confidentiality of such Information as such Person would accord to
its own confidential information.

Each of the Agents and the Lenders  acknowledges  that (a) the  Information  may
include material non-public  information concerning the Company, the Borrower or
a  Subsidiary,  as the case may be, (b) it has developed  compliance  procedures
regarding the use of material non-public information and (c) it will handle such
material  non-public  information in accordance with  applicable Law,  including
Federal and state securities Laws.

                                       70


          10.16.  WAIVERS OF JURY TRIAL. THE COMPANY,  THE BORROWER,  THE AGENTS
AND THE LENDERS HEREBY  IRREVOCABLY AND  UNCONDITIONALLY  WAIVE TRIAL BY JURY IN
ANY LEGAL  ACTION OR  PROCEEDING  RELATING TO THIS  AGREEMENT  OR ANY OTHER LOAN
DOCUMENT AND FOR ANY COUNTERCLAIM  THEREIN. EACH PARTY HERETO (A) CERTIFIES THAT
NO  REPRESENTATIVE,  AGENT OR  ATTORNEY  OF ANY OTHER  PERSON  HAS  REPRESENTED,
EXPRESSLY  OR  OTHERWISE,  THAT SUCH OTHER  PERSON  WOULD  NOT,  IN THE EVENT OF
LITIGATION,  SEEK TO ENFORCE THE FOREGOING WAIVER AND (B)  ACKNOWLEDGES  THAT IT
AND THE OTHER PARTIES  HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT AND
THE OTHER  LOAN  DOCUMENTS  BY,  AMONG  OTHER  THINGS,  THE MUTUAL  WAIVERS  AND
CERTIFICATIONS IN THIS SECTION.

          10.17. SPECIAL PROVISIONS

                (a) From and after the Closing  Date,  (i) each  Exiting  Lender
shall cease to be a party to this  Agreement,  (ii) no Exiting Lender shall have
any  obligations or liabilities  under this Agreement with respect to the period
from and after the Closing Date and, without limiting the foregoing,  no Exiting
Lender  shall  have  any  Revolving  Commitment  under  this  Agreement  or  any
participation in any Letter of Credit outstanding hereunder and (iii) no Exiting
Lender shall have any rights under the Existing Credit Agreement, this Agreement
or any  other  Loan  Document  (other  than  rights  under the  Existing  Credit
Agreement  expressly  stated to survive the  termination of the Existing  Credit
Agreement and the repayment of amounts outstanding thereunder).

                (b) The Lenders  (which are Lenders  under the  Existing  Credit
Agreement)  hereby  waive any  requirements  for notice of  prepayment,  minimum
amounts of  prepayments  of  Revolving  Credit Loans (as defined in the Existing
Credit  Agreement),  ratable  reductions of the commitments of the Lenders under
the Existing Credit  Agreement and ratable  payments on account of the principal
or interest of any Loan (as defined in the Existing Credit  Agreement) under the
Existing Credit Agreement.

                (c) The Lenders hereby  authorize the  Administrative  Agent and
the Borrower to request  borrowings  from the Lenders,  to make  prepayments  of
Loans (as defined in the Existing  Credit  Agreement) and to reduce  commitments
under the  Existing  Credit  Agreement  among the  Lenders  (as  defined  in the
Existing Credit  Agreement) in order to ensure that, upon the  effectiveness  of
this  Agreement,  the Revolving  Loans of the Lenders shall be  outstanding on a
ratable basis in accordance with their respective Revolving Percentages and that
the Revolving  Commitments  shall be as set forth on SCHEDULE 1.1A hereto and no
such  borrowing,  prepayment or reduction  shall  violate any  provisions of the
Existing Credit  Agreement or this  Agreement.  The Lenders hereby confirm that,
from and after the Closing Date, all participations of the Lenders in respect of
Letters of Credit  outstanding  hereunder pursuant to SUBSECTION 2.7(B) shall be
based upon the Revolving Percentages of the Lenders (after giving effect to this
Agreement).

                (d) The Borrower hereby terminates,  effective as of the Closing
Date, in full the commitments under the Existing Credit Agreement of the Exiting
Lenders.

                                       71


          10.18.  LIMITATION ON INTEREST.  The Lenders, the Loan Parties and any
other parties to the Loan Documents intend to contract in strict compliance with
applicable  usury law from time to time in effect.  In furtherance  thereof such
Persons  stipulate and agree that none of the terms and provisions  contained in
the Loan Documents  shall ever be construed to create a contract to pay, for the
use, forbearance or detention of money, interest in excess of the maximum amount
of  interest  permitted  to be  charged by  applicable  law from time to time in
effect. No Loan Party nor any present or future guarantors,  endorsers, or other
Persons  hereafter  becoming liable for payment of any Obligation  shall ever be
liable for unearned  interest  thereon or shall ever be required to pay interest
thereon in excess of the  maximum  amount  that may be  lawfully  charged  under
applicable  law from time to time in effect,  and the provisions of this Section
shall control over all other  provisions of the Loan  Documents  which may be in
conflict or  apparent  conflict  herewith.  The  Lenders  expressly  disavow any
intention to charge or collect excessive unearned interest or finance charges in
the event the maturity of any Obligation is accelerated.  If (a) the maturity of
any Obligation is accelerated for any reason,  (b) any Obligation is prepaid and
as a result any amounts  held to  constitute  interest are  determined  to be in
excess of the legal maximum, or (c) any Lender or any other holder of any or all
of the  Obligations  shall  otherwise  collect  moneys which are  determined  to
constitute interest which would otherwise increase the interest on any or all of
the  Obligations  to an  amount in excess of that  permitted  to be  charged  by
applicable law then in effect,  then all sums determined to constitute  interest
in excess of such legal limit shall,  without  penalty,  be promptly  applied to
reduce the then  outstanding  principal of the related  Obligations  or, at such
Lender's  or holder's  option,  promptly  returned to the  Borrower or the other
payor  thereof  upon  such  determination.  In  determining  whether  or not the
interest paid or payable, under any specific circumstances,  exceeds the maximum
amount permitted under applicable law, the Lenders and the Loan Parties (and any
other payors  thereof) shall to the greatest extent  permitted under  applicable
law, (i) characterize any  non-principal  payment as an expense,  fee or premium
rather than as interest,  (ii)  exclude  voluntary  prepayments  and the effects
thereof, and (iii) amortize,  prorate,  allocate, and spread the total amount of
interest throughout the entire  contemplated term of the instruments  evidencing
the  Obligations in accordance  with the amounts  outstanding  from time to time
thereunder  and the maximum  legal rate of interest  from time to time in effect
under  applicable law in order to lawfully charge the maximum amount of interest
permitted  under  applicable  law. In the event  applicable  law provides for an
interest ceiling under Chapter 303 of the Texas Finance Code, that ceiling shall
be the weekly  ceiling and shall be used when  appropriate  in  determining  the
Highest Lawful Rate.

          10.19. USA PATRIOT ACT NOTICE.  Each Lender that is subject to the Act
(as  hereinafter  defined)  and each of the  Agents  (each for itself and not on
behalf  of any  Lender)  hereby  notifies  the  Borrower  that  pursuant  to the
requirements  of the USA Patriot Act (Title III of Pub. L. 107-56  (signed  into
law October 26, 2001))(the  "ACT"), it is required to obtain,  verify and record
information that identifies the Borrower,  which  information  includes the name
and address of the Borrower and other information that will allow such Lender or
the Agents, as applicable, to identify the Borrower in accordance with the Act.

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

                                   CHESAPEAKE ENERGY CORPORATION


                                   By:  /s/ MARTHA A. BURGER
                                        -----------------------------------
                                        Name:  Martha A. Burger
                                        Title: Treasurer and
                                        Senior Vice President - Human Resources

                                   CHESAPEAKE EXPLORATION LIMITED PARTNERSHIP


                                   By:  Chesapeake Operating, Inc.,
                                           its general partner


                                   By:  /s/ MARTHA A. BURGER
                                        ---------------------------------------
                                        Name:  Martha A. Burger
                                        Title:  Treasurer and
                                        Senior Vice President - Human Resources


                                   BANK OF AMERICA, N.A., as a
                                     Co-Administrative Agent, as an
                                     Issuing Lender and as a Lender


                                   By:  /s/ RONALD E. MCKAIG
                                        ---------------------------------------
                                        Name:  Ronald E. McKaig
                                        Title:  Senior Vice President

                                   UNION BANK OF CALIFORNIA, N.A.,
                                     as a Co- Administrative Agent, as the
                                     Administrative Agent, as an Issuing Lender
                                     and as a Lender


                                   By:  /s/ RANDALL OSTERBERG
                                        ---------------------------------------
                                        Name:  Randall Osterberg
                                        Title:  Senior Vice President


                                   By:  /s/ SEAN MURPHY
                                        ---------------------------------------
                                        Name:  Sean Murphy
                                        Title:  Vice President