EDISON MISSION ENERGY
8-K, 1999-04-02
COGENERATION SERVICES & SMALL POWER PRODUCERS
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION



                            Washington, D.C. 20549



                                   FORM 8-K



                                CURRENT REPORT

                Amendment No. 1 to Application or Report Filed
    Pursuant to Section 13 or 15 (d) of the Securities Exchange Act of 1934



               Date of Report (Date of Earliest Event Reported)



                                March 18, 1999



                             Edison Mission Energy
            (Exact name of registrant as specified in its charter)



                                  California
        (State or other jurisdiction of incorporation or organization)



                 1-13434                                95-4031807
         (Commission File Number)          (I.R.S. Employer Identification No.)

         18101 Von Karman Avenue                   
           Irvine, California                             92612

(Address of principal executive offices)                (Zip Code)



      Registrant's telephone number, including area code: (949) 752-5588



                                Not Applicable
        (Former name or former address, if changed since last report.)
<PAGE>
 
ITEM 2.   ACQUISITION OR DISPOSITION OF ASSETS

On March 18, 1999, EME Homer City Generation L.P. (EME Homer City), an indirect,
wholly owned affiliate of Edison Mission Energy (EME), completed a transaction
with GPU, Inc., New York State Electric & Gas Corporation and their
respective affiliates to acquire the 1,884 megawatt (MW) Homer City Electric
Generating Station and certain facilities and other assets associated therewith
(collectively, Homer City). Homer City is one of the largest coal-fired
generating plants in the mid-Atlantic region of the United States.

Consideration for Homer City consisted of a cash payment of approximately $1.8
billion.  Pursuant to the Asset Purchase Agreement, EME guarantees all
obligations of EME Homer City under the Asset Purchase Agreement.

Homer City is expected to continue to operate as a coal-fired generating station
with revenue primarily derived from the sale of electricity under bilateral
arrangements with domestic utilities and power marketers under short-term
contracts (two years or less) or to the Pennsylvania-New Jersey-Maryland Power
Pool (PJM) or the New York Power Pool (NYPP).   These pools have short-term
markets, which establish an hourly clearing price.  Homer City is situated in
the PJM Control Area and is physically connected to high-voltage transmission
lines serving both the PJM and NYPP markets.  Power can also be transmitted to
the Midwestern U.S.

On March 18, 1999, Edison Mission Energy Holdings Co. (EME Holdings), parent
company of EME Homer City, closed a $1.1 billion financing and EME closed a $700
million financing. The EME Holdings financing consists of (1) an $800 million,
364-day interest only term loan, (2) a $250 million, five-year interest only
construction term loan and (3) a $50 million, five-year interest only revolving
loan. These loans are structured on a limited-recourse basis, in which the
lenders look primarily to the cash generated by EME Holdings and its
subsidiaries to repay the debt and have taken a security interest in the assets
of EME Holdings and its subsidiaries. The EME financing consists of a $700
million, 364-day interest only revolving credit facility, structured on a
recourse, unsecured basis. The proceeds of EME Holdings' $800 million loan and
EME's $700 million loan combined with cash of approximately $300 million were
used to finance the acquisition of Homer City.

<PAGE>
 
ITEM 7.   FINANCIAL STATEMENTS AND EXHIBITS

(a)   Financial Statements of business acquired. As of the date of filing of
this Current Report on Form 8-K, it is impracticable for EME to provide the
financial information required by this Item 7(a).  In accordance with Item
7(a)(4) of Form 8-K, such financial information will be filed by amendment to
this Form 8-K no later than 60 days after this report on Form 8-K is required to
be filed.

(b)   Pro forma financial information.  As of the date of filing of this Current
Report on Form 8-K, it is impracticable for EME to provide the pro forma
financial information required by this Item 7(b).  In accordance with Item
7(b)(2) of Form 8-K, such pro forma financial information will be filed by
amendment to this Form 8-K no later than 60 days after this report on Form 8-K
is required to be filed.

(c)  Exhibits.

<TABLE> 
<CAPTION> 
Exhibit No.                                     Description
- -----------                                     ----------- 
<C>               <S>
10.55             Credit Agreement, dated as of March 18, 1999 among Edison Mission Holdings Co. and Certain Commercial
                  Lending Institutions, and Citicorp USA, Inc.
                
10.56             Guarantee and Collateral Agreement made by Edison Mission Holdings Co., Edison Mission Finance
                  Co., Homer City Property Holdings, Inc., Chestnut Ridge Energy Co., Mission Energy Westside,
                  Inc., EME Homer City Generation L.P. and Edison Mission Energy in favor of United States Trust
                  Company of New York, dated as of March 18, 1999.
                
10.57             Collateral Agency and Intercreditor Agreement among Edison Mission Holdings Co., Edison Mission
                  Finance Co., Homer City Property Holdings, Inc., Chestnut Ridge Energy Co., Mission Energy Westside, 
                  Inc., EME Homer City Generation L.P., The Secured Parties' Representatives, Citicorp USA, Inc. as 
                  Administrative Agent and United States Trust Company of New York, as Collateral Agent, dated as of 
                  March 18, 1999.
                
10.58             Security Deposit Agreement among Edison Mission Holdings Co., Edison Mission Finance Co., Homer
                  City Property Holdings, Inc., Chestnut Ridge Energy Co., Mission Energy Westside, Inc., EME
                  Homer City Generation L.P. and United States Trust Company of New York, as Collateral Agent,
                  dated as of March 18, 1999.
                
10.59             Credit Support Guarantee, dated as of March 18, 1999, made by Edison Mission Energy in favor of
                  United States Trust Company of New York.
                
10.60             Debt Service Reserve Guarantee, dated as of March 18, 1999 made by Edison Mission Energy in
                  favor of United States Trust Company of New York on behalf of the various financial institutions
                  (Lenders) as are or may become parties to the Credit Agreement, dated as of March 18, 1999 among
                  Edison Mission Holdings Co., the Lenders and Citicorp USA, Inc.
                
10.61             Credit Agreement, dated March 18, 1999 among Edison Mission Energy, Certain Commercial
                  Lending Institutions and Citicorp USA, Inc.
</TABLE> 
<PAGE>
 
                                  SIGNATURES



Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.



                                    Edison Mission Energy
                                    ---------------------
                                        (Registrant)



                                    By      /s/ JAMES V. IACO, JR.
                                      ----------------------------------
                                              JAMES V. IACO, JR.,
                                          SENIOR VICE PRESIDENT AND
                                           CHIEF FINANCIAL OFFICER



Date: April 1, 1999
      -------------

<PAGE>
 
                                                                   Exhibit 10.55

                                                                  EXECUTION COPY
                                CREDIT AGREEMENT

                           dated as of March 18, 1999

                                     among

                          EDISON MISSION HOLDINGS CO.

                                      and

                    CERTAIN COMMERCIAL LENDING INSTITUTIONS,

                                      and

                               CITICORP USA, INC.

                  as the Administrative Agent for the Lenders

                                  Arranged by

               CREDIT SUISSE FIRST BOSTON, LEHMAN BROTHERS INC.,
                 SALOMON SMITH BARNEY INC. and SOCIETE GENERALE
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
<TABLE>
                                                                                                                 Page

<S>                                                                                                         <C>
ARTICLE I DEFINITIONS AND ACCOUNTING TERMS................................................................        1
     1.1   Defined Terms..................................................................................        1
     1.2   Use of Defined Terms...........................................................................       20
     1.3   Cross-References...............................................................................       20
     1.4   Accounting and Financial Determinations........................................................       20

ARTICLE II COMMITMENTS AND BORROWING PROCEDURES...........................................................       20
     2.1   Term Loan Commitments..........................................................................       20
                2.1.1 Term Loan Commitment................................................................       20
                2.1.2 Procedure for Term Loan Borrowing...................................................       20
     2.2   Revolving Loan Commitment......................................................................       21
                2.2.1  Revolving Loan Commitment..........................................................       21
                2.2.2  Procedure for Revolving Loan Borrowing.............................................       21
     2.3    Lenders Not Required To Make Loans............................................................       22
     2.4    Reduction of the Commitments..................................................................       22
     2.5    Continuation and Conversion Elections.........................................................       23
     2.6    Funding.......................................................................................       23

ARTICLE III REPAYMENTS, PREPAYMENTS, INTEREST AND FEES....................................................       24
     3.1    Repayments and Prepayments....................................................................       24
                3.1.1  Optional Prepayments and Commitment Reductions.....................................       24
                3.1.2  Mandatory Prepayments and Commitment Reductions....................................       25
     3.2    Interest Provisions...........................................................................       26
                3.2.1  Rates..............................................................................       26
                3.2.2  Post-Maturity Rates; Default Rates.................................................       26
                3.2.3  Payment Dates......................................................................       27
                3.2.4  Interest Rate Determination........................................................       27
     3.3    Fees..........................................................................................       27
                3.3.1  Facility Fee.......................................................................       27
                3.3.2  Administrative Agent's Fee and Miscellaneous Fees..................................       28
ARTICLE IV CERTAIN LIBO RATE AND OTHER PROVISIONS.........................................................       28
     4.1    LIBO Rate Lending Unlawful....................................................................       28
     4.2    Inability to Determine Rates..................................................................       28
</TABLE>

                                      -ii-

<PAGE>
 
<TABLE>
                                                                                                               Page

<S>                                                                                                         <C>
     4.3    Increased LIBO Rate Loan Costs................................................................      29
     4.4    Obligation to Mitigate........................................................................      29
     4.5    Funding Losses................................................................................      30
     4.6    Increased Capital Costs.......................................................................      31
     4.7    Taxes.........................................................................................      31
     4.8    Payments, Computations........................................................................      32
     4.9    Sharing of Payments...........................................................................      33
     4.10    Set-off......................................................................................      33
     4.11    Replacement of Lender........................................................................      34
 
ARTICLE V DEBT SERVICE RESERVE ACCOUNT....................................................................      35
     5.1    Debt Service Reserve Account..................................................................      35
     5.2    Debt Service Reserve Requirement..............................................................      35
 
ARTICLE VI CONDITIONS TO LOANS............................................................................      35
     6.1    Conditions to Effectiveness...................................................................      35
               6.1.1  Loan Documents......................................................................      35
               6.1.2  Acquisition.........................................................................      35
               6.1.3  EME Credit Support..................................................................      36
               6.1.4  Debt Ratings........................................................................      36
               6.1.5  Financial Statements................................................................      36
               6.1.6  Projections; Rating Agency Presentations............................................      36
               6.1.7  Closing Fees, Expenses..............................................................      36
               6.1.8  Approvals...........................................................................      36
               6.1.9  Consultants' Reports................................................................      37
               6.1.10  Lien Search; Recordings and Filings................................................      37
               6.1.11  Resolutions........................................................................      37
               6.1.12  Officer's Certificate..............................................................      38
               6.1.13  Opinions of Counsel................................................................      38
               6.1.14  Establishment of Accounts..........................................................      38
               6.1.15  Surveys............................................................................      38
               6.1.16  Title Insurance....................................................................      38
               6.1.17  Insurance..........................................................................      39
     6.2  All Loans.......................................................................................      39
               6.2.1  Representations and Warranties; No Default..........................................      39
               6.2.2  Borrowing Request...................................................................      40
               6.2.3  Satisfactory Legal Form.............................................................      40
</TABLE>

                                     -iii-
<PAGE>
 
<TABLE>
                                                                                                          Page
<S>                                                                                                      <C>
ARTICLE VII REPRESENTATIONS AND WARRANTIES.............................................................    40
     7.1  Financial Information........................................................................    40
     7.2  Organization; Power..........................................................................    40
     7.3  Due Authorization; Non-Contravention.........................................................    41
     7.4  Approvals....................................................................................    41
     7.5  No Material Adverse Change...................................................................    41
     7.6  Accuracy of Information......................................................................    41
     7.7  Validity.....................................................................................    42
     7.8  Compliance with Law and Contractual Obligations..............................................    42
     7.9  Regulations T, U and X.......................................................................    42
     7.10  Litigation..................................................................................    42
     7.11  Ownership of Properties.....................................................................    42
     7.12  Taxes.......................................................................................    43
     7.13  Investment Company Act; Public Utility Holding Company Act;
             Other Regulations.........................................................................    43
     7.14  Environmental Warranties....................................................................    43
     7.15  The Obligations.............................................................................    44
     7.16  Year 2000 Matters...........................................................................    44
     7.17  Pension and Welfare Plans...................................................................    44
     7.18  Subsidiaries................................................................................    45
 
ARTICLE VIII COVENANTS.................................................................................    45
     8.1  Affirmative Covenants........................................................................    45
             8.1.1  Financial Information, Reports, Notices............................................    45
             8.1.2  Continuation of Business and Maintenance of Existence..............................    48
             8.1.3  Compliance with Requirements of Law and Contractual Obligations
                      and Laws.........................................................................    48
             8.1.4  Maintenance of Generating Station..................................................    48
             8.1.5  Insurance..........................................................................    49
             8.1.6  Books and Records..................................................................    50
             8.1.7  Year 2000 Matters..................................................................    50
             8.1.8  Environmental Covenant.............................................................    50
             8.1.9  Further Assurances.................................................................    51
             8.1.10  Additional Collateral.............................................................    51
             8.1.11  Use of Proceeds...................................................................    51
             8.1.12  Recovery Events...................................................................    51
     8.2  Negative Covenants...........................................................................    52
             8.2.1  Restrictions on Indebtedness.......................................................    52
</TABLE>


                                      -iv-
<PAGE>
 
<TABLE>
                                                                                                             Page

<S>                                                                                                        <C>
             8.2.2  Liens................................................................................     54
             8.2.3  Consolidation, Merger................................................................     55
             8.2.4  Asset Dispositions...................................................................     55
             8.2.5  Subsidiaries, Investments............................................................     56
             8.2.6  Transactions with Affiliates.........................................................     57
             8.2.7  Restricted Payments..................................................................     57
             8.2.8  ERISA................................................................................     57
             8.2.9  Restrictive Agreements...............................................................     57
             8.2.10  Limitation on Lines of Business.....................................................     58
             8.2.11  Regulation of Parties...............................................................     58
             8.2.12  Limitation on Electricity Market Risk Exposure......................................     58
 
ARTICLE IX EVENTS OF DEFAULT.............................................................................     59
     9.1  Listing of Events of Default...................................................................     59
             9.1.1  Non-Payment of Obligations...........................................................     59
             9.1.2  Breach of Warranty...................................................................     59
             9.1.3  Non-Performance of Certain Covenants and Obligations.................................     59
             9.1.4  Non-Performance of Other Covenants and Obligations...................................     59
             9.1.5  Default on Other Indebtedness........................................................     59
             9.1.6  Bankruptcy, Insolvency...............................................................     59
             9.1.7  Pension Plans........................................................................     60
             9.1.8  Judgments............................................................................     61
             9.1.9  Control of the Borrower; Ownership of EME Homer City.................................     61
             9.1.10  Edison Mission Energy...............................................................     61
     9.2  Action if Bankruptcy...........................................................................     62
     9.3  Action if Other Event of Default...............................................................     62
     9.4  Rescission of Declaration......................................................................     62
 
ARTICLE X  THE AGENT.....................................................................................     63
     10.1  Actions.......................................................................................     63
     10.2  Funding Reliance..............................................................................     64
     10.3  Exculpation...................................................................................     64
     10.4  Successor.....................................................................................     65
     10.5  Loans by CUSA.................................................................................     65
     10.6  Reliance by Administrative Agent..............................................................     65
     10.7  Notice of Default.............................................................................     66
     10.8  Credit Decisions..............................................................................     66
     10.9  Copies........................................................................................     66
</TABLE>


                                      -v-
<PAGE>
 
                                                                            Page

<TABLE>
<S>                                                                                                          <C>
     10.10  Interest of Lenders in Collateral..............................................................     67
 
ARTICLE XI MISCELLANEOUS PROVISIONS........................................................................     67
     11.1  Waivers, Amendments.............................................................................     67
     11.2  Notices.........................................................................................     68
     11.3  Payment of Costs and Expenses...................................................................     68
     11.4  Indemnification.................................................................................     69
     11.5  Survival........................................................................................     70
     11.6  Severability....................................................................................     70
     11.7  Headings........................................................................................     70
     11.8  Execution in Counterparts.......................................................................     71
     11.9  Governing Law; Entire Agreement.................................................................     71
     11.10  Successors and Assigns.........................................................................     71
     11.11  Sale and Transfer of Loans and Notes; Participations in Loans..................................     71
             11.11.1  Assignments..........................................................................     71
             11.11.2  Participations.......................................................................     73
     11.12  Other Transactions.............................................................................     74
     11.13  Submission To Jurisdiction; Waivers............................................................     74
     11.14  WAIVERS OF JURY TRIAL..........................................................................     75
     11.15  Non-Recourse Persons...........................................................................     75
     11.16  Acknowledgments................................................................................     75
     11.17  Releases of Guarantees and Liens...............................................................     75
     11.18  Confidentiality................................................................................     76
</TABLE>


ANNEX

Annex I    -    Pricing Grids
 
 
SCHEDULES
 
1.1(a)     -    Commitments
1.1(b)     -    Addresses for Notices and Lending Offices
7.4        -    Governmental Approvals
7.18       -    Subsidiaries
8.1.5      -    Insurance
 
                                      -vi-
<PAGE>
 
EXHIBITS
 
A-1       -    Form of Revolving Note
A-2       -    Form of 364-Day/Construction Term Loan Note
B         -    Form of Borrowing Request
C         -    Form of Continuation/Conversion Notice
D         -    Form of Lender Assignment Agreement
E         -    Form of EME Debt Service Reserve Guarantee
 
                                     -vii-
<PAGE>
 
          CREDIT AGREEMENT, dated as of March 18, 1999, among EDISON MISSION
HOLDINGS CO., a California corporation (the "Borrower"), the various financial
                                             --------
institutions as are or may become parties hereto (collectively, the "Lenders")
                                                                     -------
and CITICORP USA, INC. ("CUSA"), as administrative agent for the Lenders (in
                         ----
such capacity, the "Administrative Agent").
                    -------------------- 

                                    RECITALS
                                    --------
          A.  The Borrower has requested that the Lenders establish credit
facilities to provide financing (i) for the acquisition of the Homer City
Electric Generating Station and certain facilities and other assets associated
therewith and ancillary thereto (collectively, the "Generating Station")
                                                    ------------------  
pursuant to the Asset Purchase Agreement, dated as of August 1, 1998 (the "Asset
                                                                           -----
Purchase Agreement"), among Pennsylvania Electric Company, NGE Generation, Inc.
- ------------------
and New York State Electric & Gas Corporation, as sellers, and EME Homer City
Generation L.P. (assignee of Mission Energy Westside, Inc.), as purchaser, (ii)
for the installation of certain pollution control equipment at the Generating
Station and (iii) for general working capital purposes.

          B.  The Lenders are willing to make such credit facilities available
upon and subject to the terms and conditions hereinafter set forth.

              NOW, THEREFORE, the parties hereto agree as follows:

                                   ARTICLE I
                        DEFINITIONS AND ACCOUNTING TERMS

          SECTION 1.1  Defined Terms.  The following terms (whether or not
                       -------------
underscored) when used in this Agreement, including its preamble and recitals,
shall, except where the context otherwise requires, have the following meanings
(such meanings to be equally applicable to the singular and plural forms
thereof):

          "Accounts" has the meaning specified in the Security Deposit
           --------
Agreement.

          "Acquisition" means the acquisition of the Generating Station by EME
           ----------- 
Homer City pursuant to the Asset Purchase Agreement.

          "Administrative Agent" means CUSA in its capacity as administrative
           --------------------
agent for the Lenders hereunder, and includes each other Person as may have
subsequently been appointed as the successor Administrative Agent pursuant to
Section 10.4.
- ------------

          "Affiliate" of any Person means any other Person which, directly or
           ---------
indirectly, controls, is controlled by or is under common control with such
Person (excluding any trustee
<PAGE>
 
under, or any committee with responsibility for administering, any Pension Plan
or Welfare Plan).  A Person shall be deemed to be "controlled by" any other
Person if such other Person possesses, directly or indirectly, power to direct
or cause the direction of the management and policies of such Person whether by
contract or otherwise.

          "Agent-Related Persons" means CUSA and any successor agent arising
           ---------------------
under Section 10.4, together with their respective Affiliates, and the officers,
      ------------
directors, employees, agents and attorneys-in-fact of such Persons and
Affiliates.

          "Agreement" means, on any date, this Credit Agreement as originally in
           ---------
effect on the Effective Date and as thereafter from time to time amended,
supplemented, amended and restated, or otherwise modified and in effect on such
date.

          "Alternate Base Rate" means, on any date and with respect to all Base
           -------------------
Rate Loans, a fluctuating rate of interest per annum equal to the higher of:

          (a)  the rate of interest in effect for such day as publicly announced
     from time to time by the Administrative Agent at its principal office in
     New York, New York, as its "base rate" (or such other term used by any
     successor Administrative Agent).  The "base rate" is a rate set by the
     Administrative Agent based upon various factors including the
     Administrative Agent's cost and desired return, general economic conditions
     and other factors, and is used as a reference point for pricing some loans,
     which may be priced at, above, or below such announced rate; or

          (b)  the Federal Funds Rate most recently determined by the
     Administrative Agent plus  1/2 of 1%.

The Alternate Base Rate is not necessarily intended to be the lowest
rate of interest determined by the Administrative Agent in connection with
extensions of credit.  Changes in the rate of interest on that portion of any
Loans maintained as Base Rate Loans will take effect simultaneously with each
change in the Alternate Base Rate. The Administrative Agent will give notice
promptly to the Borrower and the Lenders of changes in the Alternate Base Rate.

          "Applicable Margin" means, for any day with respect to any Loan, the
           -----------------  
rate per annum in effect for such day based on the Borrower's Debt Rating for
such day determined as provided in the Pricing Grid.

          "Asset Purchase Agreement" has the meaning set forth in the recitals.
           ------------------------                                   -------- 
          "Authorized Representative" means, relative to any Loan Party, those
           -------------------------
of its officers and employees whose signatures and incumbency shall have been
certified to the Administrative Agent and the Lenders pursuant to Section
                                                                  ------- 
6.1.11.
- ------
                                      -2-
<PAGE>
 
          "Base Rate Loan" means a Loan bearing interest at a fluctuating rate
           -------------- 
determined by reference to the Alternate Base Rate plus the Applicable Margin
from time to time in effect.

          "Borrower" has the meaning set forth in the preamble.
           --------                                   --------
          "Borrowing" means Loans of the same type and, in the case of LIBO Rate
           --------- 
Loans having the same Interest Period, made by all Lenders on the same Business
Day and pursuant to the same Borrowing Request in accordance with Sections 2.1.2
                                                                  --------------
and 2.2.2.
    -----

          "Borrowing Date" means any Business Day specified in a notice pursuant
           --------------
to Section 2.1.2 or 2.2.2 as a date which the Borrower requests the Lenders to
   -------------    -----  
make Loans.

          "Borrowing Request" means a loan request and certificate duly executed
           -----------------
by an Authorized Representative of the Borrower, substantially in the form of
Exhibit B.
- ---------
          "Business Day" means:
           ------------

          (a)  any day which is neither a Saturday or Sunday nor a legal holiday
     on which banks are authorized or required to be closed in New York, New
     York; and

          (b)  relative to the making, continuing, prepaying or repaying of any
     LIBO Rate Loans, any day on which dealings in Dollars are carried on in the
     London interbank market.

          "Capitalized Lease Liabilities" of any Person means all monetary
           -----------------------------
obligations of such Person under any leasing or similar arrangement which, in
accordance with GAAP, would be classified as capitalized leases, and, for
purposes of each Loan Document, the amount of such obligations shall be the
capitalized amount thereof, determined in accordance with GAAP.

          "Cash Equivalent Investment" means, at any time:
           --------------------------
          (a)  any evidence of Indebtedness, maturing not more than one year
     after such time, issued or guaranteed by the United States Government or an
     agency thereof;

          (b)  other investments in securities or bank instruments rated at
     least "A" by S&P and "A2" by Moody's or "A-1" by S&P and "P-1" by Moody's
     and with maturities of less than 366 days; or

          (c)  other securities as to which the Borrower has demonstrated, to
     the satisfaction of the Administrative Agent, adequate liquidity through
     secondary markets or deposit agreements.

                                      -3-
<PAGE>
 
          "Cashflow Available for Debt Service" means, in respect of any period,
           ----------------------------------- 
the excess, if any, of Revenues (excluding proceeds of any payments under the
EME Credit Support Guarantee or the EME Debt Service Reserve Guarantee or
proceeds of any permitted asset sale) during such period over Operating Expenses
                                                         ----
during such period.

          "CERCLIS" means the Comprehensive Environmental Response Compensation
           -------  
Liability Information System List.

          "Change in Control" means the failure of Edison Mission Energy (a) to
           -----------------
own, directly or indirectly, at least 50% of the economic equity interests of
any Loan Party on a fully diluted basis or to maintain direct or indirect voting
control of any Loan Party or (b) through one or more Affiliates, to be in
control of the operation of the Generating Station.

          "Code" means the Internal Revenue Code of 1986, as amended.
           ---- 
          "Collateral" means all assets of the Loan Parties, now owned or
           ----------
hereinafter acquired, upon which a Lien is purported to be created by any
Security Document.

          "Collateral Agency and Intercreditor Agreement" means the Collateral
           --------------------------------------------- 
Agency and Intercreditor Agreement, dated as of March 18, 1999, among the Loan
Parties, the Administrative Agent, the Secured Parties' Representative and the
Collateral Agent.

          "Collateral Agent" has the meaning set forth in the Collateral Agency
           ----------------
and Intercreditor Agreement.

          "Commitment Termination Date" means the 364-Day Term Loan Maturity
           ---------------------------
Date, the Construction Term Loan Maturity Date or the Revolving Loan Commitment
Termination Date, as applicable.

          "Commitment Termination Events" means:
           -----------------------------
          (a)  the occurrence of any Default described in clauses (a) through
                                                          -----------
     (e) of Section 9.1.6 with respect to the Borrower; or
     ---    -------------     
          (b)  the occurrence and continuance of any other Event of Default and
     the declaration of the Loans to be due and payable pursuant to Section 9.3.
                                                                    -----------
          "Commitments" means the Term Loan Commitments and the Revolving Loan
           -----------
Commitments.

          "Construction Term Loans" has the meaning set forth in Section 2.1.1.
           -----------------------                               -------------  
                                      -4-
<PAGE>
 
          "Construction Term Loan Commitment" means, relative to any Lender, the
           ---------------------------------
obligation of such Lender to make Construction Term Loans to the Borrower
hereunder in an aggregate principal amount not to exceed the amount set forth
under "Construction Term Loan Commitment" opposite such Lender's name on
Schedule 1.1(a).
- ---------------

          "Construction Term Loan Commitment Amount" means, on any date,
           ---------------------------------------- 
$250,000,000, as such amount may be reduced from time to time pursuant to
Section 2.4.
- -----------
          
          "Construction Term Loan Maturity Date" means the fifth anniversary of
           ------------------------------------
the Effective Date.

          "Construction Term Loan Note" means a promissory note of the Borrower
           ---------------------------
payable to any Lender, in the form of Exhibit A-2 hereto (as such promissory
                                      -----------
note may be amended, endorsed or otherwise modified from time to time),
evidencing the aggregate Indebtedness of the Borrower to such Lender resulting
from outstanding Construction Term Loans, and also means all other promissory
notes accepted from time to time in substitution therefor or renewal thereof.

          "Contingent Liability" means any agreement, undertaking or arrangement
           --------------------
by which any Person guarantees, endorses or otherwise becomes or is contingently
liable upon (by direct or indirect agreement, contingent or otherwise, to
provide funds for payment, to supply funds to, or otherwise to invest in, a
debtor, or otherwise to assure a creditor against loss) the indebtedness,
obligation or any other liability of any other Person (other than by
endorsements of instruments in the course of collection), or guarantees the
payment of dividends or other distributions upon the shares of any other Person.
The amount of any Person's obligation under any Contingent Liability shall
(subject to any limitation set forth therein) be deemed to be the outstanding
principal amount of the debt, obligation or other liability guaranteed thereby;
provided, however, that if the maximum amount of the debt, obligation or other
- --------  -------
liability guaranteed thereby has not been established, the amount of such
Contingent Liability shall be the maximum reasonably anticipated amount of the
debt, obligation or other liability; provided, further, however, that any
                                     --------  -------
agreement to limit the maximum amount of such Person's obligation under such
Contingent Liability shall not, of and by itself, be deemed to establish the
maximum reasonably anticipated amount of such debt, obligation or other
liability.

          "Continuation/Conversion Notice" means a notice of continuation or
           ------------------------------
conversion and certificate duly executed by an Authorized Representative of the
Borrower, substantially in the form of Exhibit C.
                                       --------- 

          "Contractual Obligation" means, 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.

                                      -5-
<PAGE>
 
          "Controlled Group" means all members of a controlled group of
           ----------------
corporations and all members of a controlled group of trades or businesses
(whether or not incorporated) under common control which, together with the Loan
Parties, are treated as a single employer under Section 414(b) or 414(c) of the
Code or Section 4001 of ERISA.

          "CUSA" has the meaning set forth in the preamble.
           ----                                   --------

          "Debt Rating" means a rating of the Borrower's secured long-term debt
           -----------
which is not supported by a guarantee, letter of credit or other form of credit
enhancement other than the Guarantee and Collateral Agreement, the EME Credit
Support Guarantee or any EME Debt Service Reserve Guarantee.  If Moody's or S&P
shall have changed its system of classifications after the date hereof, the
Borrower's Debt Rating shall be considered to be at or above a specified level
if it is at or above the new rating which most closely corresponds to the
specified level under the old rating system.

          "Debt Service" means, in respect of any period, an amount equal to the
           ------------ 
aggregate of, without duplication, (i) all interest due and payable on the Loans
plus or minus any net amount due and payable in respect of Interest Rate Hedging
- ----    -----
Transactions during such period, (ii) amounts due and payable under Section
                                                                    -------  
3.3.1 during such period, (iii) amounts due and payable to the Lenders with
- -----
respect to the deduction of withholding tax on such payments pursuant to Section
                                                                         -------
4.7 during such period and (iv) all other amounts due and payable by the Loan
- ---
Parties with respect to Indebtedness permitted under Section 8.2.1 (excluding
                                                     ------------- 
Indebtedness permitted under Sections 8.2.1(d)(i) and 8.2.1(f)) during such
                             --------------------     --------
period.

          "Debt Service Coverage Ratio" means, for any period, the ratio of (a)
           --------------------------- 
Cashflow Available for Debt Service for such period to (b) Debt Service for such
period.

          "Debt Service Reserve Account" has the meaning set forth in the
           ----------------------------
Security Deposit Agreement.

          "Debt Service Reserve Requirement" means, on each Quarterly Payment
           --------------------------------
Date, an amount equal to the Debt Service (excluding amounts thereof referred to
in clause (iv) of the definition of the term "Debt Service") projected to be due
   ----------
and payable during the two Fiscal Quarters next succeeding such Quarterly
Payment Date.

          "Default" means any Event of Default or any condition, occurrence or
           ------- 
event which, after notice or lapse of time or both, would constitute an Event of
Default.

          "Dollar" and the sign "$" mean lawful money of the United States.
           ------

          "Domestic Office" means, relative to any Lender, the office of such
           ---------------
Lender designated on Schedule 1.1(b) or designated in the Lender Assignment
                     ---------------
Agreement or such other office of a Lender (or any successor or assign of such
Lender) within the United States as may be

                                      -6-
<PAGE>
 
designated from time to time by notice from such Lender, as the case may be, to
each other Person party hereto.  A Lender may have separate Domestic Offices for
purposes of making, maintaining or continuing, as the case may be, Base Rate
Loans.

          "Easement and Attachment Agreement" means the Easement, License and
           ---------------------------------
Attachment Agreement, dated as of August 1, 1998, among NYSEG, Penelec and EME
Homer City (assignee of Mission Energy Westside, Inc.).

          "Edison Mission Energy" means Edison Mission Energy, a California
           ---------------------
corporation.

          "Effective Date" means the date this Agreement becomes effective
           --------------
pursuant to Section 6.1.
            -----------

          "Eligible Assignee" means (a) a commercial bank organized or licensed
           -----------------
under the laws of the United States, or any state thereof, and having a combined
capital and surplus of at least $250,000,000 and (b) a Person that is primarily
engaged in the business of commercial banking and that is (i) a Subsidiary of a
Lender, (ii) a Subsidiary of a Person of which a Lender is a Subsidiary or (iii)
a Person of which a Lender is a Subsidiary.

          "EME Credit Support Guarantee" means a guarantee dated as of March 18,
           ----------------------------
1999, made by Edison Mission Energy in favor of the Collateral Agent.

          "EME Debt Service Reserve Guarantee" means a guarantee by Edison
           ----------------------------------
Mission Energy, substantially in the form of Exhibit E.
                                             ---------

          "EME Homer City" means EME Homer City Generation L.P., a limited
           --------------
partnership organized under the laws of the State of Pennsylvania.

          "EMMT" means Edison Mission Marketing & Trading, Inc., a California
           ----
corporation.

          "Energy Sales Agreement" means the Energy Sales Agreement, dated March
           ----------------------
__, 1999, between EME Homer City and EMMT.

          "Environmental Capital Expenditure Program" means EME Homer City's
           -----------------------------------------
proposed schedule and budget for the installation of a flue gas desulfurization
unit and three selective catalytic reduction units in the Generating Station, as
included in the projections delivered by the Borrower pursuant to Section 6.1.6
                                                                  -------------
and as amended from time to time.

          "Environmental Laws" means all statutes, laws (including common law),
           ------------------
ordinances, codes, rules, regulations and guidelines (including consent decrees
and administrative orders), and any other legally enforceable requirements of
any Governmental Authority relating to, regulating, or imposing liability or
standards of conduct concerning Hazardous Materials,

                                      -7-
<PAGE>
 
public health or protection of the environment, as have been, are now, or may at
any time hereafter be in effect.

          "ERISA" means the Employee Retirement Income Security Act of 1974, as
           -----
amended, and any successor statute of similar import, together with the
regulations thereunder, in each case as in effect from time to time.  References
to sections of ERISA also refer to any successor sections.

          "Event of Default" has the meaning set forth in Section 9.1.
           ----------------                               ------------

          "Facility Fee" has the meaning set forth in Section 3.3.1.
           ------------                               --------------

          "Federal Funds Rate" means, for any period, a fluctuating interest
           ------------------
rate per annum equal for each day during such period to:

          (a)  the weighted average of the rates on overnight federal funds
     transactions with members of the Federal Reserve System arranged by federal
     funds brokers, as published for such day (or, if such day is not a Business
     Day, for the next preceding Business Day) by the Federal Reserve Bank of
     New York; or

          (b)  if such rate is not so published for any day which is a Business
     Day, the average of the quotations for such day on such transactions
     received by the Administrative Agent from not less than three of the Lead
     Arrangers (or if quotations are unavailable from any of them, up to three
     federal funds brokers of recognized standing selected by the Administrative
     Agent).

          "First Priority Lien" means a Lien covering the Collateral having a
           ------------------- 
priority higher than any other Lien covering the Collateral that on the
Effective Date is on file or record in any relevant jurisdiction.

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

          "Fiscal Year" means any period of twelve consecutive calendar months
           -----------
ending on December 31; references to a Fiscal Year with a number corresponding
to any calendar year (e.g., the "1999 Fiscal Year") referred to the Fiscal Year
                      --- 
ending on December 31 occurring during such calendar year.

          "FPA" means the Federal Power Act, as amended.
           ---
 
          "F.R.S. Board" means the Board of Governors of the Federal Reserve
           ------------
System or any successor thereto."  

          "GAAP" has the meaning set forth in Section 1.4.
           ----                               -----------
                                      -8-
<PAGE>
 
          "Generating Station" has the meaning set forth in the recitals.
           ------------------                                   --------

          "Governmental Approval" means any authorization, consent, approval,
           --------------------- 
license, permit, exemption, filing or registration with any Governmental
Authority.

          "Governmental Authority" means any nation or government, any state,
           ----------------------     
provincial or other political subdivision thereof and any entity exercising
executive, legislative, judicial, regulatory or administrative functions of or
pertaining to government.

          "Guarantee and Collateral Agreement" means the Guarantee and
           ----------------------------------
Collateral Agreement, dated as of March 18, 1999, among the Loan Parties and the
Collateral Agent.

          "Hazardous Material" means:
           ------------------

          (a)  any "hazardous substance", as defined by any Environmental Law;

          (b)  any "hazardous waste", as defined by any Environmental Law;

          (c)  any petroleum product (including crude oil or any fraction
     thereof); or

          (d)  any pollutant or contaminant or hazardous, dangerous or toxic
     chemical, material, force or substance (including polychlorinated
     biphenyls, urea-formaldehyde insulation, asbestos or radioactivity) that is
     regulated pursuant to or could give rise to liability under any
     Environmental Law.

          "herein", "hereof", "hereto", "hereunder" and similar terms contained
           ------    ------    ------    ---------
in any Loan Document refer to such Loan Document, as the case may be, as a whole
and not to any particular Section, paragraph or provision of such Loan Document.

          "including" means including without limiting the generality of any
           ---------
description preceding such term, and, for purposes of each Loan Document, the
parties thereto agree that the rule of ejusdem generis shall not be applicable
                                       ------- -------
to limit a general statement, which is followed by or referable to an
enumeration of specific matters, to matters similar to the matters specifically
mentioned.

          "Indebtedness" of any Person means, without duplication:
           ------------

          (a)  all indebtedness for borrowed money;

          (b)  all obligations issued, undertaken or assumed as the deferred
     purchase price of property or services which purchase price is due more
     than six months from the date of incurrence of the obligation in respect
     thereof or is evidenced by a note or other instrument, except trade
     accounts arising in the ordinary course of business;

                                      -9-
<PAGE>
 
          (c)  all reimbursement obligations with respect to surety bonds,
     letters of credit (to the extent not collateralized with cash or Cash
     Equivalent Investments), bankers' acceptances and similar instruments (in
     each case, whether or not matured);

          (d)  all obligations evidenced by notes, bonds, debentures or similar
     instruments, including obligations so evidenced incurred in connection with
     the acquisition of property, assets or businesses;

          (e)  all indebtedness created or arising under any conditional sale or
     other title retention agreement, or incurred as financing, in either case
     with respect to property acquired by the Person (even though the rights and
     remedies of the seller or bank under such agreement in the event of default
     are limited to repossession or sale of such property);

          (f)  all Capitalized Lease Liabilities;

          (g)  all net obligations with respect to interest rate cap agreements,
     interest rate swap agreements, sales of foreign exchange options and other
     hedging agreements or arrangements;

          (h)  all indebtedness referred to in clauses (a) through (g) above
                                               ----------          ---
     secured by (or for which the holder of such Indebtedness has an existing
     right, contingent or otherwise, to be secured by) any Lien upon or in
     property (including accounts and contracts rights) owned by such Person,
     even though such Person has not assumed or become liable for the payment of
     such Indebtedness; and

          (i)  all Contingent Liabilities.

For all purposes of this Agreement, the Indebtedness of any Person shall include
the Indebtedness of any partnership or joint venture in which such Person is a
general partner or a joint venturer.

          "Indenture Trustee" has the meaning set forth in the Collateral Agency
           -----------------
and Intercreditor Agreement.

          "Initial Lenders" means CUSA, Credit Suisse First Boston, Lehman
           ---------------
Commercial Paper Inc. and Societe Generale.

          "Insolvency" means, with respect to any Multiemployer Plan, the
           ----------
condition that such plan is insolvent within the meaning of Section 4245 of
ERISA.

          "Intercompany Loan Subordination Agreement" means the Intercompany
           ----------------------------------------- 
Loan Subordination Agreement, dated as of March 18, 1999, among the Loan Parties
and the Collateral Agent.

                                      -10-
<PAGE>
 
          "Interconnection Agreement" means the Interconnection Agreement, dated
           -------------------------
as of August 1, 1998, among NYSEG, Penelec and EME Homer City (assignee of
Mission Energy Westside, Inc.).

          "Interest Period" means, relative to any LIBO Rate Loan, the period
           ---------------
beginning on (and including) the date on which such LIBO Rate Loan is made or
continued as, or converted into, a LIBO Rate Loan pursuant to Section 2.1, 2.2,
                                                              ------- ---  ---
2.3 or 2.5 and ending on (but excluding) either (x) the day which numerically
- ---    ---
corresponds to such date one, two, three or six months thereafter (or, if such
month has no numerically corresponding day, on the last Business Day of such
month) as the Borrower may select in its relevant notice pursuant to Section
                                                                     -------
2.1, 2.2, 2.3 or 2.5 or (y) such other day (resulting in a longer or shorter
- ---  ---  ---    ---
period) as the Borrower may select in its relevant notice pursuant to Section
                                                                      -------
2.1, 2.2, 2.3 or 2.5 and the Administrative Agent confirms is available from all
- ---  ---  ---    ---
affected Lenders; provided, however, that:
                  --------  -------

          (a)  the Borrower shall not be permitted to select Interest Periods to
     be in effect at any one time which have expiration dates occurring on more
     than ten different dates or such other larger number of dates and on such
     terms as may be agreed to by the Borrower and the Administrative Agent;

          (b)  Interest Periods commencing on the same date for Loans comprising
     part of the same Borrowing shall be of the same duration;

          (c)  if such Interest Period would otherwise end on a day which is not
     a Business Day, such Interest Period shall end on the next following
     Business Day (unless, if such Interest Period applies to LIBO Rate Loans,
     such next following Business Day is the first Business Day of a calendar
     month, in which case such Interest Period shall end on the Business Day
     next preceding such numerically corresponding day); and

          (d)  no Interest Period may end later than the date set forth in
     clause (a) of the definition of "Revolving Loan Commitment Termination
     ----------                       -------------------------------------
     Date".
     ----

          "Interest Rate Hedging Transactions" means, as to any Person, all
           ----------------------------------
interest rate swaps, caps or collar agreements or similar arrangements entered
into by such Person in order to protect against fluctuations in interest rates
or the exchange of nominal interest obligations, either generally or under
specific contingencies, and, in any event, not for speculative purposes.

          "Investment" means, relative to any Person:
           ----------

          (a)  any loan or advance made by such Person to any other Person
     (excluding commission, travel and similar advances to officers and
     employees made in the ordinary course of business);

          (b)  any Contingent Liability of such Person; and

                                      -11-
<PAGE>
 
          (c)  any ownership or similar interest held by such Person in any
     other Person.

The amount of any Investment shall be the original principal or capital amount
thereof less all returns of principal or equity thereon (and without adjustment
by reason of the financial condition of such other Person) and shall, if made by
the transfer or exchange of property other than cash, be deemed to have been
made in an original principal or capital amount equal to the fair market value
of such property.

          "Lead Arrangers" means Credit Suisse First Boston, Lehman Brothers
           --------------
Inc., Salomon Smith Barney Inc. and Societe Generale.

          "Lender Assignment Agreement" means a Lender Assignment Agreement,
           ---------------------------
substantially in the form of Exhibit D.
                             ---------

          "Lenders" has the meaning set forth in the preamble.
           -------                                   --------

          "LIBO Rate" has the meaning set forth in Section 3.2.1.
           ---------                               -------------

          "LIBO Rate Loan" means a Loan bearing interest, at all times during an
           --------------
Interest Period applicable to such Loan, at a fixed rate of interest determined
by reference to the LIBO Rate.

          "LIBO Rate (Reserve Adjusted)" means, relative to any Loan to be made,
           ----------------------------
continued or maintained as, or converted into, a LIBO Rate Loan for any Interest
Period, a rate per annum (rounded upwards, if necessary, to the nearest whole
multiple of l/100 of 1%) determined pursuant to the following formula:

                                                    LIBO Rate
          LIBO Rate (Reserve Adjusted)  =  -------------------------------
                                           1.00 - LIBOR Reserve Percentage

          The LIBO Rate (Reserve Adjusted) for any Interest Period for LIBO Rate
Loans will be determined by the Administrative Agent on the basis of the LIBOR
Reserve Percentage in effect on, and the applicable rates furnished to and
received by the Administrative Agent, two Business Days before the first day of
such Interest Period.

          "LIBOR Office" means, relative to any Lender, the office of such
           ------------
Lender designated as such on Schedule 1.1(b) or designated in the Lender
                             ---------------
Assignment Agreement or such other office of a Lender as designated from time to
time by notice from such Lender to the Borrower and the Administrative Agent
pursuant to Section 4.4, whether or not outside the United States, which shall
            -----------
be making or maintaining LIBO Rate Loans of such Lender hereunder.

          "LIBOR Reserve Percentage" means, relative to any Interest Period for
           ------------------------
LIBO Rate Loans, the reserve percentage (expressed as a decimal) equal to the
aggregate reserve

                                      -12-
<PAGE>
 
requirements (including all basic, emergency, supplemental, marginal and other
reserves and taking into account any transitional adjustments or other scheduled
changes in reserve requirements) specified under regulations issued from time to
time by the F.R.S. Board and then applicable to assets or liabilities consisting
of and including "Eurocurrency Liabilities", as currently defined in Regulation
D of the F.R.S. Board, having a term approximately equal or comparable to such
Interest Period.

          "Lien" means any security interest, mortgage, pledge, hypothecation,
           ----
assignment, deposit arrangement, encumbrance, lien (statutory or otherwise),
charge against or interest in property, in each case of any kind, to secure
payment of a debt or performance of an obligation.

          "Loan" means Loans made by the Lenders to the Borrower pursuant to
           ----
Section 2.1 and Section 2.2, including Revolving Loans and Term Loans.
- -----------     -----------

          "Loan Documents" means this Agreement, the Notes, the Security
           --------------
Documents and the other agreements, documents and instruments delivered in
connection with this Agreement and the Notes including the fee letter referred
to in Section 3.3.2, each Borrowing Request and each Continuation/Conversion
      -------------
Notice.

          "Loan Parties" means (i) the Borrower, (ii) Edison Mission Finance
           ------------
Co., a California corporation, (iii) Homer City Property Holdings, Inc., a
California corporation, (iv) Chestnut Ridge Energy Co., a California
corporation, (v) Mission Energy Westside, Inc., a California corporation, and
(vi) EME Homer City.

          "Material Adverse Effect" means any event, development or circumstance
           -----------------------
that has had or could reasonably be expected to have a material adverse effect
on (i) the business, assets, property, financial condition or operations of the
Loan Parties, taken as a whole, since the Effective Date, or (ii) the ability of
any Loan Party to perform its obligations under any of the Loan Documents.

          "Moody's" means Moody's Investors Service, a division of Dun &
           -------
Bradstreet Corporation, and its successors and assigns.

          "Mortgage and Security Agreement" means the Mortgage and Security
           -------------------------------
Agreement, dated as of March 18, 1999, made by EME Homer City to the Collateral
Agent.

          "Multiemployer Plan" means a "multiemployer plan" as such term is
           ------------------
defined in Section 4001(a)(3) of ERISA.

          "Net Cash Proceeds" means (a) in connection with any Recovery Event,
           -----------------
the proceeds thereof in the form of cash and cash equivalents of such Recovery
Event, net of any expenses reasonably incurred in respect of such Recovery
Event, including attorneys' fees, amounts required to be applied to the
repayment of Indebtedness secured by a Lien expressly

                                      -13-
<PAGE>
 
permitted hereunder on any asset which is the subject of such Recovery Event
(other than any Lien pursuant to a Security Document) 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), to the extent that, in the case of Recovery Events relating to
property or casualty insurance claims, the amount of such proceeds exceeds
$5,000,000 with respect to any asset of any Loan Party and (b) in connection
with any issuance or sale of debt securities, the cash proceeds received from
such issuance or incurrence, net of attorneys' fees, investment banking fees,
accountants' fees, underwriting discounts and commissions and other customary
fees and expenses actually incurred in connection therewith.

          "Non-Recourse Persons" means The Mission Group, Edison Mission Energy
           --------------------
(except in respect of the EME Credit Support Guarantee and any EME Debt Service
Reserve Guarantee) and Southern California Edison Company, and the officers,
directors, employees, shareholders (except as aforesaid), agents, Authorized
Representatives and other controlling persons (except as aforesaid) of the
Borrower, provided that in no event shall any Loan Party be deemed to be a Non-
          --------
Recourse Person.

          "Note" means, as the context may require, a Revolving Note, 364-Day
           ----
Term Loan Note or a Construction Term Loan Note.

          "NY Pool" means the New York Power Pool or any successor thereto.
           -------

          "NYSEG" means the New York State Electric & Gas Corporation.
           -----

          "Obligations" means all obligations (monetary or otherwise) of the
           -----------
Loan Parties arising under or in connection with the Loan Documents.

          "Operating Expenses" means, in respect of any period, all cash amounts
           ------------------
paid by the Loan Parties in the conduct of their business during such period,
including premiums for insurance policies, fuel supply and transportation costs,
utilities, costs of maintaining, renewing and amending Governmental Approvals,
franchise, licensing, property, real estate and income taxes, sales and excise
taxes, general and administrative expenses, employee salaries, wages and other
employment-related costs, business management and administrative services fees,
fees for letters of credit, surety bonds and performance bonds described in
Section 8.2.1(d)(i), necessary capital expenditures (other than capital
- -------------------
expenditures made with the proceeds of (a) Construction Term Loans or (b)
Indebtedness permitted under Section 8.2.7(b) and all other fees and expenses
                             ----------------
necessary for the continued operation and maintenance of the Generating Station
and the conduct of the business of the Loan Parties.

          "Organic Document" means, with respect to any Person that is a
           ----------------
corporation, its certificate of incorporation, its by-laws and all shareholder
agreements, voting trusts and similar arrangements applicable to any of its
authorized shares of capital stock, and, with respect to any

                                      -14-
<PAGE>
 
Person that is a limited partnership, its certificate of limited partnership and
partnership agreement.

          "Participant" has the meaning set forth in Section 11.11.2.
           -----------                               ----------------
          "PBGC" means the Pension Benefit Guaranty Corporation and any entity
           ----
succeeding to any or all of its functions under ERISA.

          "Penelec" means the Pennsylvania Electric Company.
           -------

          "Pension Plan" means a "pension plan", as such term is defined in
           ------------
Section 3(2) of ERISA (other than a Multiemployer Plan), and to which any Loan
Party or any member of the Controlled Group, has any liability, including any
liability by reason of having been a substantial employer within the meaning of
Section 4063 of ERISA at any time during the preceding five years, or by reason
of being deemed to be a contributing sponsor under Section 4069 of ERISA or
having an obligation to contribute under Section 4212 of ERISA.

          "Percentage" means, with respect to the 364-Day Term Loan Commitment,
           ----------
the Construction Term Loan Commitment or the Revolving Loan Commitment of any
Lender, the percentage set forth on Schedule 1.1(a) for such Commitment opposite
                                    ---------------
its name or set forth in the Lender Assignment Agreement pursuant to which such
Lender became a Lender hereunder, as such percentage may be adjusted from time
to time pursuant to any Lender Assignment Agreement executed by such Lender and
delivered pursuant to Section 11.11.
                      -------------

          "Person" means any natural person, corporation, partnership, limited
           ------
liability company, firm, association, trust, government, governmental agency or
any other entity, whether acting in an individual, fiduciary or other capacity.

          "PJM" means PJM Interconnection, L.L.C, or any successor thereto.
           ---
  
          "Pricing Grid" means the pricing grid attached as Annex I.
           ------------                                     ------- 

          "Prudent Industry Practice" means, at a particular time, (a) any of
           -------------------------
the practices, methods and acts engaged in or approved by a significant portion
of the competitive electric generating industry at such time, or (b) with
respect to any matter to which clause (a) does not apply, any of the practices,
                               ---------
methods and acts which, in the exercise of reasonable judgment at the time the
decision was made, could have been expected to accomplish the desired result at
a reasonable cost consistent with good business practices, reliability, safety
and expedition. "Prudent Industry Practice" is not intended to be limited to the
optimum practice, method or act to the exclusion of all others, but rather to be
a spectrum of possible practices, methods or acts having due regard for, among
other things, manufacturers' warranties and the requirements of any Governmental
Authority of competent jurisdiction.

                                      -15-
<PAGE>
 
          "PUHCA" means the Public Utility Holding Company Act of 1935, as
           ----- 
amended.

          "Quarterly Payment Date" means the first Business Day of each January,
           ----------------------
April, July and October.

          "Recovery Event" means any settlement of or payment of $5,000,000 or
           --------------
more in respect of (a) any property or casualty insurance claim relating to any
asset of any Loan Party or (b) any seizure, condemnation, confiscation or taking
of, or requisition of title or use of, the Generating Station or any part
thereof by any Governmental Authority.

          "Reinvestment Deferred Amount" means with respect to any Recovery
           ----------------------------
Event, the aggregate Net Cash Proceeds received by any Loan Party in connection
therewith which are not applied to prepayments or reductions pursuant to Section
                                                                         -------
3.1.2(b) as a result of the delivery of a Reinvestment Notice.
- --------
          "Reinvestment Notice" has the meaning set forth in Section 8.1.12.
           -------------------                               --------------

          "Reinvestment Prepayment Amount" means, with respect to any Recovery
           ------------------------------
Event, the Reinvestment Deferred Amount relating thereto less any amount which,
                                                         ----
prior to the relevant Reinvestment Prepayment Date, the Loan Party has spent or
has agreed, pursuant to a binding written contract (under which performance is
in progress) to spend, to restore or replace the assets in respect of which a
Recovery Event has occurred pursuant to Section 8.1.12.
                                        ---------------

          "Reinvestment Prepayment Date" means, with respect to any Recovery
           ----------------------------
Event, the earliest of (a) the first date occurring after such Recovery Event on
which an Event of Default shall have occurred, (b) the date occurring twelve
months after such Recovery Event and (c) the date on which the Loan Party shall
have determined not to, or shall have otherwise ceased to, restore or replace
the assets in respect of which a Recovery Event has occurred.

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

          "Reportable Event" means 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 .13, .14, .16, .18, .19 or .20 of PBGC Reg.
Section 2615.

          "Required Deposit Rating" means a short-term certificate of deposit
           -----------------------
rating from Moody's of P-1 and from Standard & Poor's of A-1+, and a long-term
unsecured debt rating of not less than Aa3 by Moody's and AA- by Standard &
Poor's.

          "Required Lenders" means, at any time, Lenders holding a majority of
           ----------------
the Commitments.

                                      -16-
<PAGE>
 
          "Requirement of Law" means, as to any Person, the Organic 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.

          "Restricted Payment" has the meaning set forth in Section 8.2.7.
           ------------------                               -------------

          "Restricted Payment Date" means (i) in the case of any Restricted
           -----------------------
Payment being made exclusively with the proceeds of Indebtedness incurred
pursuant to Section 8.2.1(e) remaining after repayment in full of the 364-Day
            ----------------
Term Loans, any Business Day specified by the Borrower, and (ii) in all other
cases, any Quarterly Payment Date.

          "Revenue Account" has the meaning set forth in the Security Deposit
           ---------------
Agreement.

          "Revenues" means, in respect of any period, all cash amounts received
           --------
by the Loan Parties during such period, including revenues from the sale of
energy and capacity, proceeds of business interruption insurance and all
interest and other income earned on amounts in the Accounts.

          "Revolving Loan" means Loans made by the Lenders to the Borrower
           --------------
pursuant to Section 2.2, including Base Rate Loans and LIBO Rate Loans.
            ----------- 

          "Revolving Loan Commitment" means, relative to each Lender, the
           -------------------------
obligation of such Lender to make Revolving Loans to the Borrower hereunder in
an aggregate principal amount set forth under "Revolving Loan Commitment"
opposite such Lender's name on Schedule 1.1(a).
                               ---------------   

          "Revolving Loan Commitment Amount" means, on any date, $50,000,000, as
           --------------------------------
such amount may be reduced from time to time pursuant to Section 2.4.
                                                         -----------

          "Revolving Loan Commitment Termination Date" means the earliest of:
           ------------------------------------------

          (a) the fifth anniversary of the Effective Date;

          (b) the date on which the Revolving Loan Commitment Amount is
     terminated in full or reduced to zero pursuant to Section 2.4; or
                                                       -----------
          (c) the date on which any Commitment Termination Event occurs.

          "Revolving Note" means a promissory note of the Borrower payable to
           --------------
any Lender, in the form of Exhibit A-1 (as such promissory note may be amended,
                           -----------
endorsed or otherwise modified from time to time), evidencing the aggregate
Indebtedness of the Borrower to

                                      -17-
<PAGE>
 
such Lender resulting from outstanding Revolving Loans, and also means all other
promissory notes accepted from time to time in substitution therefor or renewal
thereof.

          "S&P" means Standard & Poor's Ratings Services and its successors and
           ---
assigns.

          "Same Day Funds" means immediately available funds.
           --------------

          "Secured Parties" has the meaning set forth in the Collateral Agency
           --------------- 
and Intercreditor Agreement.

          "Secured Parties' Representative" has the meaning set forth in the
           ------------------------------- 
Security Deposit Agreement.

          "Security Deposit Agreement" means the Security Deposit Agreement,
           --------------------------    
dated as of March 18, 1999, among the Loan Parties and the Collateral Agent.

          "Security Documents" means (i) the Guarantee and Collateral Agreement,
           ------------------
the Mortgage and Security Agreement, the Intercompany Loan Subordination
Agreement, the Collateral Agency and Intercreditor Agreement, the Security
Deposit Agreement and (ii) the EME Credit Support Guarantee and any other
agreement or instrument hereafter entered into by the Borrower or any other
Person which guarantees or  secures payment of the indebtedness evidenced by the
Notes or payment or performance of any other Obligation.

          "Senior Debt" means (i) the Obligations and (ii) any Indebtedness of
           ----------- 
the Borrower permitted under Section 8.2.1(b), 8.2.1(c), 8.2.1(d) or 8.2.1(e).
                             ----------------  --------  --------    --------
          "Subsidiary" means, with respect to any Person, any corporation,
           ----------
partnership, limited liability company or other entity of which more than 50% of
the outstanding capital stock, partnership interests or other equity interests
having ordinary voting power to elect a majority of the board of directors of
such corporation (irrespective of whether at the time capital stock of any other
class or classes of such corporation shall or might have voting power upon the
occurrence of any contingency) or to control the management of such partnership,
limited liability company or other entity is at the time directly or indirectly
owned by such Person, by such Person and one or more other Subsidiaries of such
Person, or by one or more other Subsidiaries of such Person.

          "Taxes" has the meaning set forth in Section 4.7.
           -----                               -----------

          "Term Loans" means the 364-Day Term Loans and the Construction Term
           ----------                            
Loans.

          "Term Loan Commitments" means, relative to any Lender, such Lender's
           ---------------------
obligations to make 364-Day Term Loans pursuant to Section 2.1.1 and
                                                   -------------
Construction Term Loans pursuant to Section 2.1.1.
                                    -------------
 
                                      -18-
<PAGE>
 
          "Term Loan Commitment Amount" means the aggregate of the 364-Day Term
           ---------------------------
Loan Commitment Amount and the Construction Term Loan Commitment Amount.

          "364-Day Term Loan" has the meaning set forth in Section 2.1.1.
           -----------------                               -------------

          "364-Day Term Loan Commitment" means, relative to any Lender,  the
           ----------------------------    
obligation of such Lender to make a 364-Day Term Loan to the Borrower hereunder
in a principal amount not to exceed the amount set forth under "364-Day Term
Loan Commitment" opposite such Lender's name on Schedule 1.1(a).
                                                ---------------

          "364-Day Term Loan Commitment Amount" means $800,000,000.
           -----------------------------------

          "364-Day Term Loan Maturity Date" means the date which is 364 days
           -------------------------------
after the Effective Date.

          "364-Day Term Loan Note" means a promissory note of the Borrower
           ---------------------- 
payable to any Lender, in the form of Exhibit A-2 hereto (as such promissory
                                      -----------
note may be amended, endorsed or otherwise modified from time to time),
evidencing the aggregate Indebtedness of the Borrower to such Lender resulting
from outstanding 364-Day Term Loans, and also means all other promissory notes
accepted from time to time in substitution therefor or renewal thereof.

          "Title Insurance Company" means the title insurance company issuing
           -----------------------
any policy referred to in Sections 6.1.15 and 6.1.16.
                          ---------------     ------

          "Total Commitment Amount" means the Revolving Loan Commitment Amount
           -----------------------
and Term Loan Commitment Amount.

          "type" means, relative to any Loan, the portion thereof, if any, being
           ----
maintained as a Base Rate Loan or a LIBO Rate Loan.

          "United States" or "U.S." means the United States of America, its
           -------------      ----
fifty States and the District of Columbia.

          "Welfare Plan" means a "welfare plan", as such term is defined in
           ------------
Section 3(1) of ERISA.

          "Year 2000 Problem" means any significant risk that computer hardware,
           -----------------
software or equipment containing embedded microchips essential to the businesses
or operations of the Loan Parties will not, in the case of dates or time periods
occurring after December 31, 1999, function at least as effectively as in the
case of dates or time periods occurring prior to January 1, 2000.

                                      -19-
<PAGE>
 
          SECTION 1.2  Use of Defined Terms.  Unless otherwise defined or the
                       --------------------
context otherwise requires, terms for which meanings are provided in this
Agreement shall have such meanings when used in each Note, Borrowing Request,
Continuation/Conversion Notice, Loan Document, notice and other communication
delivered from time to time in connection with this Agreement or any other Loan
Document.

          SECTION 1.3  Cross-References.  Unless otherwise specified, references
                       ----------------
in this Agreement to any Article, Section, Annex, Exhibit or Schedule are
references to such Article, Section, Annex, Exhibit or Schedule of or to this
Agreement and, unless otherwise specified, references in any Article, Section or
definition to any clause or paragraph are references to such clause or paragraph
of such Article, Section or definition.

          SECTION 1.4  Accounting and Financial Determinations.  Unless
                       ---------------------------------------
otherwise specified, all accounting terms used herein or in any other Loan
Document shall be interpreted, all accounting determinations and computations
hereunder or thereunder shall be made, and all financial statements required to
be delivered hereunder or thereunder shall be prepared in accordance with, those
generally accepted accounting principles in effect in the United States("GAAP")
                                                                         ----
applied in the preparation of the financial statements referred to in Section
                                                                      -------
7.1, except that quarterly financial statements are not required to contain
- ---
footnotes.

                                   ARTICLE II
                      COMMITMENTS AND BORROWING PROCEDURES

          SECTION 2.1 Term Loan Commitments.  On the terms and subject to the
                      ---------------------
conditions of this Agreement, each Lender severally agrees to make Term Loans
pursuant to such Lender's Term Loan Commitment as provided in this Section 2.1.
                                                                   ------------ 

          SECTION 2.1.1 Term Loan Commitment.  Each Lender severally agrees to
                        --------------------
make a term loan (each, a "364-Day Term Loan") to the Borrower on the Effective
                           -----------------
Date in a principal amount not to exceed the 364-Day Term Loan Commitment of
such Lender and each Lender severally agrees to make term loans (each, a
"Construction Term Loan") to the Borrower prior to the Construction Term Loan
- ------------------------
Maturity Date in an aggregate principal amount not to exceed the Construction
Term Loan Commitment of such Lender.  Term Loans may from time to time be LIBO
Rate Loans or Base Rate Loans, as determined by the Borrower and notified to the
Administrative Agent in accordance with Sections 2.1.2 and 2.5.  The 364-Day
                                        --------------     ---
Term Loans shall be made in a single drawing on the Effective Date.
Construction Term Loans shall be made in multiple drawings in accordance with
the Environmental Capital Expenditure Program.

          SECTION 2.1.2  Procedure for Term Loan Borrowing.  The Borrower may
                         ---------------------------------
irrevocably request to borrow under (a) the 364-Day Term Loan Commitments on the
Effective Date or (b) the Construction Term Loan Commitments prior to the
Construction Term Loan Maturity Date on any Business Day in accordance with this
Section 2.1.2, by delivering a
- -------------

                                      -20-
<PAGE>
 
Borrowing Request to the Administrative Agent on a Business Day on or before
12:00 Noon, New York City time, (x) on not less than three Business Days' notice
in the case of LIBO Rate Loans, or (y) on the same Business Day, in the case of
Base Rate Loans, specifying (i) the amount and type of Term Loans to be
borrowed, (ii) the requested Borrowing Date and (iii) in the case of LIBO Rate
Loans, the respective amounts of each such type of Loan and the respective
lengths of the initial Interest Periods therefor.  Each borrowing under the Term
Loan Commitments shall be in an amount equal to $5,000,000 or an integral
multiple of $1,000,000 in excess thereof or, in the case of Construction Term
Loans, the unused amount of the Construction Term Loan Commitment Amount.  Upon
receipt of any such notice from the Borrower, the Administrative Agent shall
promptly notify each Lender thereof.  On or before 2:00 P.M., New York City
time, on the Business Day such Term Loans are to be made, each Lender shall
deposit with the Administrative Agent Same Day Funds in an amount equal to such
Lender's Percentage of the requested Borrowing.  Such deposit will be made to an
account which the Administrative Agent shall specify from time to time by notice
to the Lenders. To the extent funds are received from the Lenders, the Agent
shall make such funds available to the Borrower by wire transfer to the accounts
the Borrower shall have specified in its Borrowing Request.  No Lender's
obligation to make any Loan shall be affected by any other Lender's failure to
make any Loan.

          SECTION 2.2  Revolving Loan Commitment.  On the terms and subject to
                       ------------------------- 
the conditions of this Agreement, each Lender severally agrees to make Revolving
Loans pursuant to such Lender's Revolving Loan Commitment as provided in this
Section 2.2.
- -----------

          SECTION 2.2.1  Revolving Loan Commitment.  From time to time on any
                         -------------------------
Business Day occurring prior to the Revolving Loan Commitment Termination Date,
each Lender severally agrees to make Revolving Loans (each, a "Revolving Loan")
                                                               -------------- 
to the Borrower equal to such Lender's Percentage of the Borrowing of Revolving
Loans requested or deemed to be requested by the Borrower to be made on such
day.  The Revolving Loans may from time to time be LIBO Rate Loans or Base Rate
Loans, as determined by the Borrower and notified to the Administrative Agent in
accordance with Section 2.2.2 and 2.5.  The Borrower may from time to time
                -------------     ---
borrow, prepay, in whole or in part, and reborrow Revolving Loans.  Revolving
Loan Commitments shall terminate automatically on the Revolving Loan Commitment
Termination Date.

          SECTION 2.2.2  Procedure for Revolving Loan Borrowing.  By delivering
                         --------------------------------------
a Borrowing Request to the Administrative Agent on or before 12:00 Noon, New
York City time, on a Business Day, the Borrower may from time to time
irrevocably request, (i) on not less than three Business Days' notice, in the
case of LIBO Rate Loans, and (ii) on the same Business Day, in the case of Base
Rate Loans, that a Borrowing of Revolving Loans be made in a minimum amount of
$5,000,000 and an integral multiple of $1,000,000 in excess thereof, or in the
unused amount of the Revolving Loan Commitment Amount.  On the terms and subject
to the conditions of this Agreement, each Borrowing shall be comprised of the
same type of Loans, and shall be made on the Business Day, specified in such
Borrowing Request.  On or before 2:00 P.M., New York City time, on the Business
Day such Revolving Loans are to be made, each Lender shall

                                      -21-
<PAGE>
 
deposit with the Administrative Agent Same Day Funds in an amount equal to such
Lender's Percentage of the requested Borrowing.  Such deposit will be made to an
account which the Administrative Agent shall specify from time to time by notice
to the Lenders.  To the extent funds are received from the Lenders, the
Administrative Agent shall make such funds available to the Borrower by wire
transfer to the accounts the Borrower shall have specified in its Borrowing
Request.  No Lender's obligation to make any Loan shall be affected by any other
Lender's failure to make any Loan.

          SECTION  2.3  Lenders Not Required To Make Loans.  No Lender shall be
                        ----------------------------------
required to make:

          (a)   any Revolving Loan if, after giving effect thereto,

          (i)  the aggregate outstanding principal amount of all Revolving Loans
     would exceed the Revolving Loan Commitment Amount, or

          (ii)  the aggregate outstanding principal amount of all Revolving
     Loans of  such Lender would exceed such Lender's Revolving Loan Commitment;
     or

          (b)   any Term Loan if, after giving effect thereto,

          (i)  the aggregate outstanding principal amount of all 364-Day Term
     Loans would exceed the 364-Day Term Loan Commitment Amount, or

          (ii)  the aggregate outstanding principal amount of all Construction
     Term Loans would exceed the Construction Term Loan Commitment Amount, or

          (iii)  the outstanding principal amount of the 364-Day Term Loan of
     such Lender would exceed such Lender's 364-Day Term Loan Commitment, or

          (iv)  the aggregate outstanding principal amount of all Construction
     Term Loans of such Lender would exceed such Lender's Construction Term Loan
     Commitment.

          SECTION  2.4  Reduction of the Commitments.  The Borrower may, from
                        ----------------------------
time to time on any Business Day occurring after the Effective Date, voluntarily
reduce the Revolving Loan Commitment Amount or the Construction Term Loan
Commitment Amount without premium or penalty (subject, however, to Section 4.5);
                                                                   -----------
provided, however, that all such reductions shall require at least three hours'
- --------  -------
prior notice to the Administrative Agent and be permanent, and any partial
reduction of the Revolving Loan Commitment Amount and the Construction Term Loan
Commitment Amount shall be in a minimum amount of $10,000,000; and, provided,
                                                                    -------- 
further, that (i) the Revolving Loan Commitment Amount may not be reduced to an
- -------
amount less than the aggregate amount of outstanding Revolving Loans and (ii)
the

                                      -22-
<PAGE>
 
Construction Term Loan Commitment Amount may not be reduced to an amount less
than the aggregate amount of outstanding Construction Term Loans.

          SECTION  2.5  Continuation and Conversion Elections. By delivering a
                        -------------------------------------
Continuation/Conversion Notice to the Administrative Agent on or before 12:00
Noon, New York City time on a Business Day, the Borrower may from time to time
irrevocably elect that all, or any portion in an aggregate minimum amount of
$5,000,000 and an integral multiple of $1,000,000 in excess thereof, of any
Loans be (i) on not less than three Business Days' notice, converted into, or
continued as, LIBO Rate Loans, or (ii) on the same Business Day, be converted
into, or continued as Base Rate Loans.  In the absence of delivery of a
Continuation/Conversion Notice with respect to any  LIBO Rate Loan, such  LIBO
Rate Loan shall automatically be continued as a LIBO Rate Loan with an Interest
Period of the same duration as the then expiring Interest Period; provided,
                                                                  --------
however, that (x) each such conversion or continuation shall be pro rated among
- -------
the applicable outstanding Loans of all Lenders, (y) a LIBO Rate Loan may not be
converted at any time other than the last day of the Interest Period applicable
thereto and (z) no portion of the outstanding principal amount of any Loans may
be continued as, or be converted into, LIBO Rate Loans when any Default or Event
of Default under Section 9.1.1 has occurred and is continuing.  Each delivery of
                 -------------
a Continuation/Conversion Notice shall constitute a certification and warranty
by the Borrower that on the date of delivery of such notice no Default has
occurred and is continuing.  If prior to the time of such continuation or
conversion any matter certified to by the Borrower by reason of the immediately
preceding sentence will not be true and correct at such time if then made, the
Borrower will immediately so notify the Administrative Agent. Except to the
extent, if any, that prior to the time of such continuation or conversion the
Administrative Agent shall have received written notice to the contrary from the
Borrower, such certification and warranty shall be deemed to be made at the date
of such continuation or conversion as if then made.  Upon the occurrence and
during the continuance of any Event of Default under Section 9.1.1, each LIBO
                                                     -------------
Rate Loan shall convert automatically to a Base Rate Loan at the end of the
Interest Period then in effect for such LIBO Rate Loan.

          SECTION  2.6  Funding.  Each Lender may, if it so elects, fulfill its
                        -------
obligation to make, continue or convert LIBO Rate Loans hereunder by causing one
of its foreign branches or Affiliates (or an international banking facility
created by such Lender) to make or maintain such LIBO Rate Loan; provided,
                                                                 --------
however, that such LIBO Rate Loan shall nonetheless be deemed to have been made
- -------
and to be held by such Lender, and the obligation of the Borrower to repay such
LIBO Rate Loan shall nevertheless be to such Lender for the account of such
foreign branch, Affiliate or international banking facility.  In addition, the
Borrower hereby consents and agrees that, for purposes of any determination to
be made for purposes of Sections 4.1, 4.2, 4.3, 4.4 or 4.5, it shall be
                        ------------  ---  ---  ---    ---
conclusively assumed that each Lender elected to fund all LIBO Rate Loans by
purchasing deposits in its LIBOR Office's interbank eurodollar markets.

                                      -23-
<PAGE>
 
                                  ARTICLE III
                   REPAYMENTS, PREPAYMENTS, INTEREST AND FEES

          SECTION 3.1  Repayments and Prepayments.  (a) The 364-Day Term Loan of
                       --------------------------
each Lender shall mature, and the Borrower unconditionally promises to pay in
full the unpaid principal amount of such 364-Day Term Loan to the Administrative
Agent, for the account of such Lender, on the 364-Day Term Loan Maturity Date.

          (b)  The Construction Term Loan of each Lender shall mature, and the
Borrower unconditionally promises to pay in full the unpaid principal amount of
such Construction Term Loan to the Administrative Agent, for the account of such
Lender, on the Construction Term Loan Maturity Date.

          (c)  The Revolving Loans of each Lender shall mature, and the Borrower
unconditionally promises to pay in full the unpaid principal amount of each
Revolving Loan to the Administrative Agent, for the account of such Lender, on
the Revolving Loan Commitment Termination Date.

          (d) The Borrower shall, immediately upon any acceleration of any Loans
pursuant to Section 9.2 or Section 9.3, repay all Loans, unless, pursuant to
            -----------    -----------
Section 9.3, only a portion of all Loans is so accelerated.
- -----------

          SECTION 3.1.1  Optional Prepayments and Commitment Reductions.  (a)
                         ----------------------------------------------
At any time, and from time to time, the Borrower may, on any Business Day, make
a voluntary prepayment, in whole or in part, of the outstanding principal amount
of the Loans; provided, however, that:
              --------  -------

          (i)  unless the Borrower notifies the Administrative Agent that such
     prepayment is to be applied to prepay Revolving Loans, any such prepayment
     made on or prior to the 364-Day Term Loan Maturity Date shall be applied
     first to the 364-Day Term Loans until such Loans are paid in full and,
     -----
     second, to the Construction Term Loans until such Loans are paid in full;
     ------

          (ii)  unless the Borrower notifies the Administrative Agent that such
     prepayment is to be applied to prepay Revolving Loans, any such prepayment
     made after the 364-Day Term Loan Maturity Date shall be applied to the
     Construction Term Loans until such Loans are paid in full;

          (iii)  any such prepayment shall be applied pro rata among Loans of
                                                      --- ----
     the same type and, if applicable, having the same Interest Period;

                                      -24-
<PAGE>
 
          (iv)  any such prepayment of any LIBO Rate Loan made on any day other
     than the last day of the Interest Period for such Loan shall be subject to
     the provisions of Section 4.5;
                       -----------

          (v)  any such prepayment of LIBO Rate Loans shall require at least two
     Business Days' prior written notice to the Administrative Agent and any
     such prepayment of Base Rate Loans may be made on same day's written notice
     to the Administrative Agent; and

          (vi)  any such partial prepayment of Loans shall be in an aggregate
     minimum amount of $10,000,000.

          (b) Each prepayment of Loans made pursuant to this Section 3.1.1 shall
                                                             -------------
be accompanied by accrued interest to the date of such prepayment on the amount
prepaid but shall be without premium or penalty, except as may be required by
Section 4.5. Each voluntary prepayment of Term Loans shall automatically and
- ----------- 
permanently reduce the related Term Loan Commitment Amount by a like amount.  No
voluntary prepayment of Revolving Loans shall cause a reduction in the Revolving
Loan Commitment Amount.

          SECTION 3.1.2  Mandatory Prepayments and Commitment Reductions.  (a)
                         -----------------------------------------------
If any Indebtedness shall be issued or incurred by any Loan Party in accordance
with Section 8.2.1(e), an amount equal to the lesser of (i) 100% of the Net Cash
     ----------------
Proceeds thereof and (ii) the aggregate principal amount of the 364-Day Term
Loans outstanding shall be applied within one Business Day after the issuance or
incurrence of such Indebtedness to the prepayment of the 364-Day Term Loans.

          (b)  If any Loan Party shall receive Net Cash Proceeds from any
Recovery Event, an amount equal to 100% of such Net Cash Proceeds shall be
applied on such date to the prepayment of Senior Debt as set forth below, unless
the Borrower delivers a Reinvestment Notice in respect of such Recovery Event
pursuant to Section 8.1.12, in which case, an amount equal to the Reinvestment
            --------------                                     
Prepayment Amount with respect to such Recovery Event shall be applied on each
Reinvestment Prepayment Date to the prepayment of Senior Debt as set forth
below.  Any such prepayment shall be applied ratably to the prepayment of the
Senior Debt in proportion to the outstanding principal amounts thereof on the
date of such repayment.  Any such prepayment of the Loans made on or prior to
the 364-Day Term Loan Maturity Date shall be applied first to the 364-Day Term
                                                     -----
Loans until such Loans are paid in full, second, to the Construction Term Loans
                                         ------
until such Loans are paid in full and, third, to the Revolving Loans.  Any such
                                       ----- 
prepayment of Loans made after the 364-Day Term Loan Maturity Date shall be
applied first to the Construction Term Loans until such Loans are paid in full
        ----- 
and second to the Revolving Loans.  Any such prepayment shall be applied pro
    ------                                                               ---
rata among Loans of the same type and, if applicable, having the same Interest
- ---- 
Period.

          (c)  Each prepayment made pursuant to this Section 3.1.2 shall be
                                                     -------------
accompanied by accrued interest to the date of such prepayment on the amount
prepaid but shall be without

                                      -25-
<PAGE>
 
premium or penalty, except as may be required by Section 4.5.  Each mandatory
                                                 -----------
prepayment of Loans shall automatically and permanently reduce the 364-Day Term
Loan Commitment Amount, the Construction Term Loan Commitment Amount or the
Revolving Loan Commitment Amount, as the case may be, by a like amount.

          SECTION 3.2  Interest Provisions.  Interest on the outstanding
                       -------------------
principal amount of Loans shall accrue and be payable in accordance with this
Section 3.2.
- -----------

          SECTION 3.2.1  Rates.  (a)  Pursuant to an appropriately delivered
                         -----
Borrowing Request or Continuation/Conversion Notice, the Borrower may elect that
Loans comprising a Borrowing accrue interest at a rate per annum:

          (i)  on that portion maintained from time to time as a Base Rate Loan,
     equal to the sum of the Alternate Base Rate from time to time in effect
     plus the Applicable Margin from time to time in effect; and

          (ii)  on that portion maintained as a LIBO Rate Loan, during each
     Interest Period applicable thereto, equal to the sum of the LIBO Rate for
     such Interest Period plus the Applicable Margin from time to time in
     effect.

          "LIBO Rate" means, for each day during each Interest Period for each
           --------- 
LIBO Rate 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 Telerate Service Page 3750 as of
11:00 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 Telerate
Service Page 3750, the "LIBO 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 11:00 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.  Notwithstanding any other provision
hereof, at such time as there shall exist for any Lender a LIBOR Reserve
Percentage which is greater than zero, the LIBO Rate used in the determination
of LIBO Rate Loans made by such Lender shall be the LIBO Rate (Reserve
Adjusted).

          (b) All LIBO Rate Loans shall bear interest from and including the
first day of the applicable Interest Period to (but not including) the last day
of such Interest Period at the interest rate determined as applicable to such
LIBO Rate Loan.

          SECTION 3.2.2  Post-Maturity Rates; Default Rates.  (a)  After the
                         ----------------------------------
date any principal amount of any Loan is due and payable (whether on a
Commitment Termination Date, upon acceleration or otherwise), or after any
monetary Obligation of the Borrower shall become

                                      -26-
<PAGE>
 
due and payable, the Borrower shall pay, but only to the extent permitted by
law, interest (after as well as before judgment) on such overdue amount at a
rate per annum equal to the Alternate Base Rate plus the Applicable Margin plus
                                                                           ----
2% until such amount is paid in full.

          (b) Upon the occurrence and during the continuance of any Event of
Default (other than an Event of Default under Section 9.1.1, for which provision
                                              -------------
is made in Section 3.2.2(a) above), the Borrower shall pay, but only to the
           ----------------
extent permitted by law, in addition to the interest then payable on the Loans,
interest (after as well as before judgment) on the Loans at 2% per annum until
such Event of Default is cured.

          SECTION 3.2.3  Payment Dates.  Interest accrued on each Loan shall be
                         -------------
payable, without duplication:

          (a)  on the Commitment Termination Date;

          (b)  on the date of any payment or prepayment, in whole or in part, of
     principal outstanding on such Loan;

          (c)  with respect to Base Rate Loans, on each Quarterly Payment Date
     occurring after the date of the initial Borrowing hereunder;

          (d)  with respect to LIBO Rate Loans, the last day of each applicable
     Interest Period (and, if such Interest Period shall exceed three months, on
     the day three months after such Loan is made or continued); and

          (e)  on that portion of any Loans which is accelerated pursuant to
     Section 9.2 or Section 9.3, immediately upon such acceleration.
     -----------    -----------

Interest accrued on Loans or other monetary Obligations arising under any Loan
Document after the date such amount is due and payable (whether on any
Commitment Termination Date, upon acceleration or otherwise) shall be payable
upon demand.

          SECTION 3.2.4  Interest Rate Determination.  The Administrative Agent
                         ---------------------------
shall determine the interest rate applicable to Loans and shall give prompt
notice to the Borrower and the Lenders of such determination, and its
determination thereof shall be conclusive in the absence of manifest error.

          SECTION 3.3  Fees.  The Borrower agrees to pay the fees set forth in
                       ----
this Section 3.3.
     -----------

          SECTION 3.3.1  Facility Fee.  The Borrower agrees to pay to the
                         ------------
Administrative Agent, for the ratable account of each Lender, facility fees (the
"Facility Fee") in respect of each of the amount of the Construction Term Loan
 ------------
Commitment Amount and the Revolving Loan

                                      -27-
<PAGE>
 
Commitment Amount (irrespective of usage) for each day from and after the
Effective Date at the rate per annum based on the Borrower's Debt Rating for
such day determined as provided in the Pricing Grid.  Such fees shall be payable
in arrears on each Quarterly Payment Date, commencing with the first such date
following the Effective Date, and on each Commitment Termination Date.

          SECTION 3.3.2  Administrative Agent's Fee and Miscellaneous Fees.  The
                         -------------------------------------------------
Borrower agrees to pay to the Administrative Agent, for (i) its own account,
(ii) the account of the Lenders and (iii) the account of the Lead Arrangers, the
respective fees as agreed to in the letter dated February 19, 1999, between the
Administrative Agent, the Lead Arrangers, the Initial Lenders, the Borrower and
Edison Mission Energy.

                                   ARTICLE IV
                     CERTAIN LIBO RATE AND OTHER PROVISIONS

          SECTION 4.1  LIBO Rate Lending Unlawful.  If any Lender shall
                       --------------------------
reasonably determine (which determination shall, upon notice thereof to the
Borrower and the Administrative Agent, be conclusive and binding on the Borrower
absent manifest error) that the introduction of or any change in or in the
interpretation of any law, rule or regulation makes it unlawful, or any central
bank or other governmental authority or comparable agency asserts that it is
unlawful, for such Lender to make, continue or maintain any Loan as, or to
convert any Loan into, a LIBO Rate Loan, the obligations of such Lender to make,
continue, maintain or convert any such Loans shall, upon such determination,
forthwith be suspended until such Lender shall notify the Administrative Agent
that the circumstances causing such suspension no longer exist, and all LIBO
Rate Loans of such Lender shall automatically convert into Base Rate Loans at
the end of the then current Interest Periods with respect thereto or sooner, if
required by such law or assertion.

          SECTION 4.2  Inability to Determine Rates.  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 LIBO Rate for such
     Interest Period; or

          (b)  the Administrative Agent shall have received notice from the
     Required Lenders in respect of the relevant Borrowing that the LIBO 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 Loans during such
     Interest Period;

                                      -28-
<PAGE>

 
the Administrative Agent shall give telecopy or telephonic notice thereof to the
Borrower and the relevant Lenders as soon as practicable thereafter.  If such
notice is given (x) any LIBO Rate Loans under the relevant Borrowing requested
to be made on the first day of such Interest Period shall be made as Base Rate
Loans, (y) any Loans under the relevant Borrowing that were to have been
converted on the first day of such Interest Period to LIBO Rate Loans shall be
continued as Base Rate Loans and (z) any outstanding LIBO Rate Loans under the
relevant Borrowing 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 LIBO Rate Loans under the relevant
Borrowing shall be made or continued as such, nor shall the Borrower have the
right to convert Loans under the relevant Borrowing to LIBO Rate Loans.

          SECTION 4.3  Increased LIBO Rate Loan Costs.  If after the date
                       ------------------------------
hereof, the adoption of any applicable law, rule or regulation, or any change
therein, or any change in the interpretation or administration thereof by any
governmental authority, central bank or comparable agency charged with the
interpretation or administration thereof, or compliance by any Lender (or its
LIBOR Office) with any request or directive (whether or not having the force of
law) of any such authority, central bank or comparable agency shall increase the
cost to such Lender of, or result in any reduction in the amount of any sum
receivable by such Lender in respect of, making, continuing or maintaining (or
of its obligation to make, continue or maintain) any Loans as, or of converting
(or of its obligation to convert) any Loans into, LIBO Rate Loans, then the
Borrower agrees to pay to the Administrative Agent for the account of each
Lender the amount of any such increase or reduction.  Such Lender shall promptly
notify the Administrative Agent and the Borrower in writing of the occurrence of
any such event, such notice to state, in reasonable detail, the reasons therefor
and the additional amount required fully to compensate such Lender for such
increased cost or reduced amount. Such additional amounts shall be payable by
the Borrower directly to such Lender within ten Business Days of its receipt of
such notice, and such notice shall be binding on the Borrower absent clear and
convincing evidence to the contrary.

          SECTION 4.4  Obligation to Mitigate.  Each Lender agrees that as
                       ----------------------
promptly as practicable after it becomes aware of the occurrence of an event
that would entitle it to give notice pursuant to Section 4.l, 4.3 or 4.6, and in
                                                 ------- ---  ---    ---
any event if so requested by the Borrower, each Lender shall use reasonable
efforts to make, fund or maintain its affected Loans through another lending
office if as a result thereof the increased costs would be avoided or materially
reduced or the illegality would thereby cease to exist and if, in the sole
opinion of such Lender, the making, funding or maintaining of such Loans through
such other lending office would not in any material respect be disadvantageous
to such Lender, contrary to such Lender's normal banking practices or violate
any applicable law or regulation.  No change by a Lender in its Domestic Office
or LIBOR Office made for such Lender's convenience shall result in any increased
cost to the Borrower.  The Borrower shall not be obligated to compensate any
Lender for the amount of any additional amount pursuant to Section 4.1, 4.3 or
                                                           -----------  ---
4.6 accruing prior to the date which is 90 days before the date on which such
- ---
Lender first notifies the Borrower that it intends to claim such compensation;
it being understood that the calculation of the actual amounts may not be
possible

                                      -29-
<PAGE>
 
within such period and that such Lender may provide such calculation as soon as
reasonably practicable thereafter without affecting or limiting the Borrower's
payment obligation thereunder.  If any Lender demands compensation pursuant to
Section 4.1, 4.3 or 4.6 with respect to any LIBO Rate Loan, the Borrower may, at
- -----------  ---    ---
any time upon at least one Business Days prior notice to such Lender through the
Administrative Agent, elect to convert such Loan into a Base Rate Loan.
Thereafter, unless and until such Lender notifies the Borrower that the
circumstances giving rise to such notice no longer apply, all such LIBO Rate
Loans by such Lender shall bear interest as Base Rate Loans, notwithstanding any
prior election by the Borrower to the contrary.  If such Lender notifies the
Borrower that the circumstances giving rise to such notice no longer apply, the
Borrower may elect that the principal amount of each such Loan again bear
interest as LIBO Rate Loans in accordance with this Agreement, on the first day
of the next succeeding Interest Period applicable to the related LIBO Rate Loans
of other Lenders.  Additionally, the Borrower may, at its option, upon at least
five Business Days' prior notice to such Lender, elect to prepay in full,
without premium or penalty, such Lender's affected LIBO Rate Loans.  If the
Borrower elects to prepay any Loans pursuant to this Section 4.4, the Borrower
                                                     -----------
shall pay within ten Business Days after written demand any additional increased
costs of such Lender accruing for the period prior to such date of prepayment.
If such conversion or prepayment is made on a day other than the last day of the
current Interest Period for such affected LIBO Rate Loans, such Lender shall be
entitled to make a request for, and the Borrower shall pay, compensation under
Section 4.5.
- -----------

          SECTION 4.5  Funding Losses.  In the event any Lender shall incur any
                       --------------
loss or expense (including any loss or expense incurred by reason of the
liquidation or reemployment of deposits or other funds acquired by such Lender
to make, continue or maintain any portion of the principal amount of any Loan
as, or to convert any portion of the principal amount of any Loan into, a LIBO
Rate Loan) as a result of:

          (a) any conversion or repayment or prepayment of the principal amount
     of any LIBO Rate Loans on a date other than the scheduled last day of the
     Interest Period applicable thereto, whether pursuant to Section 3.1 or
                                                             -----------
     otherwise;

          (b) Borrower's failure to borrow any LIBO Rate Loans in accordance
     with the Borrowing Request therefor; or

          (c) any Loans not being continued as, or converted into, LIBO Rate
     Loans in accordance with the Continuation/Conversion Notice therefor;

then, upon the written notice of such Lender to the Borrower (with a copy to the
Administrative Agent), the Borrower shall, within ten Business Days of its
receipt thereof, pay directly to such Lender such amount as will (in the
reasonable determination of such Lender) reimburse such Lender for such loss or
expense.  Such written notice (which shall include calculations in reasonable
detail) shall be binding on the Borrower absent manifest error.

                                      -30-
<PAGE>
 
          SECTION 4.6  Increased Capital Costs.  If after the date hereof any
                       -----------------------
change in, or the introduction, adoption, effectiveness, interpretation,
reinterpretation or phase-in of, any applicable law or regulation, directive,
guideline, decision or request (whether or not having the force of law) of any
court, central bank, regulator or other governmental authority affects the
amount of capital required to be maintained by any Lender, and such Lender
reasonably determines that the rate of return on its capital as a consequence of
its Revolving Loan Commitment, the Term Loan Commitments or the Loans made by
such Lender is reduced in a material amount to a level below that which such
Lender could have achieved but for the occurrence of any such circumstance,
then, in any such case upon notice from time to time by such Lender to the
Borrower, the Borrower shall pay within ten Business Days after such demand
directly to such Lender additional amounts sufficient to compensate such Lender
for such reduction in rate of return.  A statement of such Lender as to any such
additional amount or amounts (including calculations thereof in reasonable
detail) shall be binding on the Borrower absent manifest error.

          SECTION 4.7  Taxes.  (a)  All payments by the Borrower of principal
                       -----
of, and interest on, the Loans and all other amounts payable hereunder shall be
made free and clear of and without deduction for any present or future income,
excise, stamp or franchise taxes and other taxes, fees, duties, withholdings or
other charges of any nature whatsoever imposed by any taxing authority, but
excluding franchise taxes and taxes imposed on or measured by any Lender's net
income, in each case, imposed as result of a connection between the Lender and
the jurisdiction imposing the tax (other than a connection arising solely from
the Lender having executed, delivered or performed its obligations or received a
payment under, or enforced, this Agreement) (such non-excluded items being
called "Taxes"). In the event that any withholding or deduction from any payment
        -----
to be made by the Borrower hereunder is required in respect of any Taxes
pursuant to any applicable law, rule or regulation, then the Borrower will:

          (i) pay directly to the relevant authority the full amount required to
     be so withheld or deducted;

          (ii) within 30 days after such payment forward to the Administrative
     Agent an official receipt or other documentation satisfactory to the
     Administrative Agent evidencing such payment to such authority; and

          (iii)  pay to the Administrative Agent for the account of the Lenders
     such additional amount or amounts as is necessary to ensure that the net
     amount actually received by each Lender will equal the full amount such
     Lender would have received had no such withholding or deduction been
     required.

Moreover, if any Taxes are directly asserted against the Administrative Agent or
any Lender with respect to any payment received by the Administrative Agent or
such Lender hereunder, the Administrative Agent or such Lender may pay such
Taxes and, upon receipt of notice from the Administrative Agent or such Lender
within 30 days after such payment, the Borrower will

                                      -31-
<PAGE>
 
promptly pay such additional amounts including any penalties, interest or
expenses) as is necessary in order that the net amount received by such person
after the payment of such Taxes (including any Taxes on such additional amount)
shall equal the amount such person would have received had no such Taxes been
asserted.

          (b)  If the Borrower fails to pay any Taxes when due to the
appropriate taxing authority or fails to remit to the Administrative Agent, for
the account of the respective Lenders, the required receipts or other required
documentary evidence, the Borrower shall indemnify the Lenders for any
incremental Taxes, interest or penalties that may become payable by any Lender
as a result of any such failure.  For purposes of this Section 4.7, a
                                                       -----------
distribution hereunder by the Administrative Agent or any Lender to or for the
account of any Lender shall be deemed a payment by the Borrower.

          (c)  Each Lender that is not a United States person as defined in
Section 7701(a)(3) of the Code (a "Non-U.S. Lender") shall deliver to the
                                   ---------------
Borrower and the Administrative Agent two copies of either U.S. Internal Revenue
Service Form 1001 or Form 4224, 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.  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).  The Borrower shall not be required to increase any such amounts
payable to any Non-U.S. Lender with respect to any Non-Excluded Taxes (i) that
are attributable to such Non-U.S. Lender's failure to comply with the
requirements of this Section 4.7(c) or (ii) that are United States withholding
                     --------------
taxes imposed on amounts payable to such Lender at the time the 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 Section 4.7(a).
                                                                 --------------
Notwithstanding any other provision of this Section 4.7(c), a Non-U.S. Lender
                                            -------------- 
shall not be required to deliver any form pursuant to this Section 4.7(c) that
                                                           --------------
such Non-U.S. Lender is not legally able to deliver.

          SECTION 4.8  Payments, Computations.  Unless otherwise expressly
                       ----------------------
provided, all payments by the Borrower pursuant to any Loan Document shall be
made by the Borrower to the Administrative Agent for the pro rata account of the
                                                         --- ----
Lenders entitled to receive such payment.  All such payments required to be made
to the Administrative Agent shall be made, without setoff, deduction or
counterclaim, not later than 12:00 Noon, New York City time, on the date due, in
Same Day Funds, to such account as the Administrative Agent shall specify from
time to time by notice to the Borrower; provided that such payment shall be
                                        --------
deemed made timely if made by wire transfer and by such time as an Authorized
Representative of the Borrower has advised the

                                      -32-
<PAGE>
 
Administrative Agent of the applicable Federal Reserve System wire transfer
confirmation number. Funds received after that time shall be deemed to have been
received by the Administrative Agent on the next succeeding Business Day. The
Administrative Agent shall promptly remit in Same Day Funds to each Lender its
share, if any, of such payments received by the Administrative Agent for the
account of such Lender. All interest and fees shall be computed on the basis of
the actual number of days (including the first day but excluding the last day)
occurring during the period for which such interest or fee is payable over a
year comprised of 360 days (or, in the case of interest on a Base Rate Loan, 365
days or, if appropriate, 366 days). Whenever any payment to be made shall
otherwise be due on a day which is not a Business Day, such payment shall
(except as otherwise required by clause (c) of the definition of the term
                                 ----------
"Interest Period" with respect to LIBO Rate Loans) be made on the next
 ---------------
succeeding Business Day and such extension of time shall be included in
computing interest and fees, if any, in connection with such payment.

          SECTION 4.9  Sharing of Payments.  If any Lender shall obtain any
                       -------------------
payment or other recovery (whether voluntary, involuntary, by application of
setoff or otherwise) on account of any Obligation under the Loan Documents, the
EME Credit Support Guarantee or the EME Debt Service Reserve Guarantee (other
than pursuant to the terms of Sections 4.3, 4.4, 4.5, 4.6, and 4.7) in excess of
                              ------------  ---  ---  ---      ---
its pro rata share of payments then or therewith obtained by all Lenders holding
    --- ----
Loans of such type, such Lender shall purchase from the other Lenders such
participations in Loans made by them as shall be necessary to cause such
purchasing Lender to share the excess payment or other recovery ratably with
each of them; provided, however, that if all or any portion of the excess
              --------  -------
payment or other recovery is thereafter recovered from such purchasing Lender,
the purchase shall be rescinded and each Lender which has sold a participation
to the purchasing Lender shall repay to the purchasing Lender the purchase price
to the ratable extent of such recovery together with an amount equal to such
selling Lender's ratable share (according to the proportion of (a) the amount of
such selling Lender's required repayment to the purchasing Lender to (b) the
total amount so recovered from the purchasing Lender) of any interest or other
amount paid or payable by the purchasing Lender in respect of the total amount
so recovered.  The Borrower agrees that any Lender so purchasing a participation
from another Lender pursuant to this Section 4.9 may, to the fullest extent
                                     -----------
permitted by law, exercise all its rights of payment (including pursuant to
Section 4.10) with respect to such participation as fully as if such Lender were
- ------------
the direct creditor of the Borrower in the amount of such participation.

          If under any applicable bankruptcy, insolvency or other similar law,
any Lender receives a secured claim in lieu of a setoff to which this Section
                                                                      -------
4.9 applies, such Lender shall, to the extent practicable, exercise its rights
- ---
in respect of such secured claim in a manner consistent with the rights of the
Lenders entitled under this Section 4.9 to share in the benefits of any recovery
                            -----------
on such secured claim.

          SECTION 4.10  Set-off.  Each Lender shall, upon the occurrence of any
                        -------
Event of Default described in clauses (a) or (b) of Section 9.1.6 and, upon the
                              -----------    ---    -------------
occurrence of any Default described in clauses (c) through (d) of Section 9.1.6
                                       -----------         ---    -------------
with respect to the Borrower or, with the

                                      -33-
<PAGE>
 
consent of the Required Lenders, upon the occurrence and continuance beyond the
expiration of the applicable grace period, if any, of any other Event of
Default, have the right to appropriate and apply to the payment of the
Obligations owing to it (whether or not then due), and (as security for such
Obligations) the Borrower hereby grants to each Lender a continuing security
interest in, any and all balances, credits, deposits, accounts or moneys of the
Borrower then or thereafter maintained with such Lender or any bank controlling
such Lender; provided, however, that any such appropriation and application
             --------  -------
shall be subject to the provisions of Section 4.9.
                                      -----------

          Each Lender agrees promptly to notify the Borrower and the
Administrative Agent after any such set-off and application made by such Lender;
provided, however, that the failure to give such notice shall not affect the
- --------  -------
validity of such set-off and application.

          The rights of each Lender under this Section 4.10 are in addition to
                                               ------------
other rights and remedies (including other rights of set-off under applicable
law or otherwise) which such Lender may have.

          SECTION 4.11  Replacement of Lender. The Borrower shall be permitted
                        ---------------------
to replace (with one or more replacement Lenders) any Lender which requests
reimbursement for amounts owing pursuant to Section 4.1, 4.3, 4.6 or 4.7;
                                            ---------------------    ---
provided that (i) such replacement does not conflict with any law, treaty, rule
- --------
or regulation or determination of an arbitrator or a court or other governmental
authority, in each case applicable to the Borrower or such Lender or to which
the Borrower or such Lender or any of their respective property is subject, (ii)
no Default or Event of Default shall have occurred and be continuing at the time
of such replacement, (iii)  the Borrower shall repay (or the replacement bank or
institution shall purchase, at par) all Loans and other amounts owing to such
replaced Lender prior to the date of replacement, (iv) the Borrower shall be
liable to such replaced Lender under Section 4.5 if any LIBO Rate Loan owing to
                                     -----------
such replaced Lender shall be prepaid (or purchased) other than on the last day
of the Interest Period relating thereto, (v) the replacement bank or
institution, if not already a Lender, shall be reasonably satisfactory to the
Administrative Agent, (vi) the replaced Lender shall be obligated to make such
replacement in accordance with the provisions of Section 11.11.1 (provided that
                                                 ---------------  --------
the Borrower or replacement Lender shall be obligated to pay the registration
and processing fee), (vii) until such time as such replacement shall be
consummated, the Borrower shall pay all additional amounts (if any) required
pursuant to Section 4.1, 4.3, 4.6 or 4.7, as the case may be, (viii) any such
            ---------------------    ---
replacement shall not be deemed to be a waiver of any rights which the Borrower,
the Administrative Agent or any other Lender shall have against the replaced
Lender, and (ix) if such replacement bank or institution is not already a
Lender, the Borrower shall pay to the Administrative Agent an administrative fee
of $3,500.

                                      -34-
<PAGE>
 
                                   ARTICLE V
                          DEBT SERVICE RESERVE ACCOUNT

          SECTION 5.1  Debt Service Reserve Account.  The Borrower shall
                       ----------------------------
establish, for the benefit of the Lenders, in the name of the Collateral Agent,
the Debt Service Reserve Account, to be held and maintained by the Collateral
Agent in accordance with the Security Deposit Agreement.

          SECTION 5.2   Debt Service Reserve Requirement.  The Debt Service
                        --------------------------------
Reserve Requirement may be satisfied by the Borrower by one or a combination of
the following: (i) cash; (ii) a letter of credit issued by a commercial bank or
other financial institution whose long-term unsecured debt securities are rated
A or better by S&P's and A2 or better by Moody's; and (iii) an EME Debt Service
Reserve Guarantee.

                                   ARTICLE VI
                              CONDITIONS TO LOANS

          SECTION 6.1  Conditions to Effectiveness.  This Agreement shall become
                       ---------------------------
effective upon the satisfaction of each of the conditions precedent set forth in
this Section 6.1.
     -----------

          SECTION 6.1.1  Loan Documents.  The Administrative Agent shall have
                         --------------
received: (i) this Agreement, executed and delivered by an Authorized
Representative of the Borrower, with a counterpart for each Lender; (ii) the
Guarantee and Collateral Agreement, executed and delivered by an Authorized
Representative of each Loan Party (together with an updated copy of the stock
register or other register of ownership interests of such Loan Party other than
the Borrower), with a counterpart or a copy for each Lender; (iii) the Mortgage
and Security Agreement, executed and delivered by an Authorized Representative
of each Loan Party which is a party to such agreement, with a counterpart or a
copy for each Lender; (iv) the Collateral Agency and Intercreditor Agreement,
executed and delivered by an Authorized Representative of each Loan Party, with
a counterpart or a copy for each Lender; (v) the Security Deposit Agreement,
executed and delivered by an Authorized Representative of each Loan Party, with
a counterpart or a copy for each Lender; (vi) the Intercompany Loan
Subordination Agreement, executed and delivered by an Authorized Representative
of each Loan Party, with a counterpart or a copy for each Lender; and (vii) for
the account of each Lender who so requests, its Notes, executed and delivered by
an Authorized Representative of the Borrower.

          SECTION 6.1.2  Acquisition.  The Acquisition shall have been
                         -----------
consummated on substantially the terms and conditions of the Asset Purchase
Agreement; and the Lenders have received copies of the Asset Purchase Agreement
and all related material documents reasonably requested by the Administrative
Agent, certified by an Authorized Representative of the Borrower,  and the
Lenders shall be satisfied with the terms and conditions thereof (which shall
include a cash equity investment in the Borrower of at least $1,000,000,000).

                                      -35-
<PAGE>
 
          SECTION 6.1.3  EME Credit Support.  The Administrative Agent shall
                         ------------------
have received from Edison Mission Energy the EME Credit Support Guarantee.

          SECTION 6.1.4  Debt Ratings.  The Borrower shall have received written
                         ------------
preliminary Debt Ratings of its senior secured long-term debt of BBB- or better
from S&P's and Baa3 or better from Moody's, in each case in form and substance
reasonably satisfactory to the Initial Lenders.

          SECTION 6.1.5  Financial Statements.  The Administrative Agent shall
                         --------------------
have received, with a copy for each Lender, the audited consolidated financial
statements of Edison Mission Energy for the 1997 Fiscal Year and the unaudited
consolidated financial statements of Edison Mission Energy for the 1998 Fiscal
Year.

          SECTION 6.1.6  Projections; Rating Agency Presentations.  The
                         ----------------------------------------
Administrative Agent shall have received, with a copy for each Lender, (a)
satisfactory financial projections for the Borrower for the 1999-2019 Fiscal
Years, including pro forma consolidated financial statements, calculations of
                 --- -----
the projected Debt Service Coverage Ratios and the Environmental Capital
Expenditure Program and (b) the financial projections and other material
information provided to the rating agencies in connection with the issuance of
the Debt Ratings referred to in Section 6.1.4.
                                -------------

          SECTION 6.1.7  Closing Fees, Expenses.  The Administrative Agent shall
                         ----------------------
have received for its own account, or for the account of each Lender or Lead
Arranger, as the case may be, all fees due and payable pursuant to Sections 3.3
                                                                            ---
and 11.3 and all costs and expenses for which invoices have been presented.

          SECTION 6.1.8  Approvals.  (a)  All Governmental Approvals required in
                         ---------
connection with the transactions contemplated by the Loan Documents, the
Acquisition and the conduct of the business of each of the Loan Parties are
listed on Schedule 7.4 and shall have been obtained or made, be in full force
          ------------
and effect and be final and any period for the filing of notice of rehearing or
application for judicial review of the issuance of each such Governmental
Approval shall have expired without any such notice or application having been
given or made, except as noted in Part B of Schedule 7.4.  No such Governmental
                                  ------    ------------
Approval is the subject of any pending or, except as indicated in Part C of
                                                                  ------
Schedule 7.4,  threatened judicial or administrative proceeding.
- ------------

          (b)  All consents and approvals required to be obtained from Persons
other than Governmental Authorities in connection with the transactions
contemplated by the Loan Documents and the Acquisition shall have been obtained
and shall be in full force and effect, other than such consents or approvals,
the failure of which to obtain, would not, individually or in the aggregate,
cause a Material Adverse Effect.

                                      -36-
<PAGE>
 
          SECTION 6.1.9  Consultants' Reports.  The Administrative Agent shall
                         --------------------
have received, with a copy for each Lender, (i) an engineering report prepared
by Stone & Webster and (ii) a market report prepared by Hagler Bailly, in each
case in form and substance reasonably satisfactory to the Lenders.

          SECTION 6.1.10  Lien Search; Recordings and Filings.  (a)  The
                          -----------------------------------
Administrative Agent shall have received results of a recent search by a Person
satisfactory to it that there are no Uniform Commercial Code, judgment or tax
lien filings on any of the assets of any Loan Party  in each relevant
jurisdiction except for (i) Liens pursuant to the Loan Documents and (ii) Liens
to be discharged on or prior to the Effective Date pursuant to documentation
reasonably satisfactory to the Administrative Agent.

          (b) All financing statements and other documents required to be filed,
registered or recorded in order to create, in favor of the Collateral Agent for
the benefit of the Secured Parties, a perfected, First Priority Lien shall have
been properly filed, registered or recorded in each office in each jurisdiction
in which such filings, registrations and recordations are required to perfect
the security interests created by the Security Documents, and any other action
required in the judgment of the Administrative Agent to perfect such security
interests as such First Priority Liens shall have been effected, the
Administrative Agent shall have received acknowledgment copies or other evidence
satisfactory to it of such filing, registration or recording, and the
Administrative Agent shall have received evidence satisfactory to it that all
necessary filing, recording and other fees and all taxes and expenses related to
such filings, registrations and recordings have been paid in full.

          SECTION 6.1.11  Resolutions.  The Administrative Agent shall have
                          -----------
received from each Loan Party a certificate, in form and substance reasonably
satisfactory to the Administrative Agent, dated the Effective Date, of its
Secretary, Assistant Secretary or other Authorized Representative of such Loan
Party as to:

          (a) resolutions of its Board of Directors then in full force and
     effect authorizing the execution, delivery and performance of each Loan
     Document to be executed by it;

          (b) the incumbency and signatures of those of its officers and
     representatives authorized to act with respect to each Loan Document
     executed by it; and

          (c) such Loan Party's Organic Documents.

The Administrative Agent and each Lender may conclusively rely upon such
certificate until it shall have received a further certificate of the Secretary,
Assistant Secretary or other Authorized Representative of such Loan Party
canceling or amending such prior certificate.

                                      -37-
<PAGE>
 
          SECTION 6.1.12  Officer's Certificate.  The Administrative Agent shall
                          ---------------------
have received, with a copy for each Lender, a certificate of an Authorized
Representative of the Borrower, dated the Effective Date, in form and substance
reasonably satisfactory to the Administration Agent.

          SECTION 6.1.13  Opinions of Counsel.  The Administrative Agent shall
                          -------------------
have received opinions, dated the Effective Date and addressed to the
Administrative Agent and the Lenders, from (i)  the general counsel to the Loan
Parties, (ii) the special New York and Federal Energy Regulatory Commission
counsel to the Loan Parties, (iii)  the special Pennsylvania counsel to the Loan
Parties, (iv) the special New York counsel to the Lenders, and (v) the special
Pennsylvania counsel to the Lenders.  Each such opinion shall be in form and
substance reasonably satisfactory to the Administrative Agent.

          SECTION 6.1.14  Establishment of Accounts.  The Administrative Agent
                          -------------------------
shall have received evidence satisfactory to it that the Borrower has
established the Revenue Account pursuant to Section 2.2(a) of the Security
                                            --------------
Deposit Agreement.

          SECTION 6.1.15  Surveys.  The Administrative Agent and the Title
                          -------
Insurance Company each shall have received maps or plats of an as-built survey
of the sites of the real property covered by the Mortgage and Security Agreement
certified to the Administrative Agent and the Title Insurance Company in a
manner reasonably satisfactory to each of them, dated a date reasonably
satisfactory to the Administrative Agent and the Title Insurance Company,
prepared by an independent professional licensed land surveyor reasonably
satisfactory to the Administrative Agent and the Title Insurance Company, which
maps or plats and the surveys on which they are based shall (except as such
survey may fail to demonstrate a closed traverse within 35 feet at the reservoir
site) be made in accordance with the Minimum Standard Detail Requirements for
Land Title Surveys jointly established and adopted by the American Land Title
Association and the American Congress on Surveying and Mapping in 1992, and,
without limiting the generality of the foregoing, there shall be surveyed and
shown on such maps, plats or surveys the following:  (i) the locations on such
sites of all the buildings, structures and other improvements and evidence
reasonably satisfactory to the Administrative Agent delineating the established
building setback lines; (ii) the lines of streets abutting the sites and width
thereof; (iii) all access and other easements appurtenant to the sites necessary
to use the sites; (iv) whether recorded, apparent from a physical inspection of
the sites or otherwise known to the surveyor, all roadways, paths, driveways,
easements, encroachments and overhanging projections and similar encumbrances
affecting the sites and any encroachments on any adjoining property by the
building structures and improvements on the sites; and (v) if the site is
described as being on a filed map, a legend relating the survey to said map.

          SECTION 6.1.16  Title Insurance; Flood Insurance.  (a) The
                          --------------------------------
Administrative Agent shall have received in respect of each parcel of owned real
property covered by the Mortgage and Security Agreement, a mortgagee's title
policy (or policies) or marked up unconditional binder for such insurance dated
the date of the recording of the Mortgage and Security Agreement.  Each

                                      -38-
<PAGE>
 
such policy shall (i) be in an amount reasonably satisfactory to the
Administrative Agent; (ii) insure that the Mortgage and Security Agreement
creates a valid first Lien on such parcel free and clear of all defects and
encumbrances, except those as may be approved by the Administrative Agent; (iii)
name the Collateral Agent for the benefit of the Secured Parties as the insured
thereunder; (iv) be in the form of an ALTA Loan Policy; (v) contain such
endorsements and affirmative coverage as the Administrative Agent may reasonably
request; and (vi) be issued by title companies reasonably satisfactory to the
Administrative Agent (including any such title companies acting as co-insurers
or reinsurers, at the option of the Administrative Agent).  The Administrative
Agent shall have received evidence reasonably satisfactory to it that all
premiums in respect of each such policy, and all charges for Mortgage and
Security Agreement recording tax, if any, have been paid.  The Administrative
Agent shall have also received a copy of all recorded documents referred to, or
listed as exceptions to title in, the title policy or policies referred to in
this subsection and a copy certified by such parties as the Administrative Agent
may deem reasonably appropriate, of all other documents affecting the property
covered by the Mortgage and Security Agreement as shall have been reasonably
requested by the Administrative Agent.

          (b)   If requested by the Administrative Agent, the Administrative
Agent shall have received (i) a policy of flood insurance which (A) covers any
parcel of improved real property which is encumbered by the Mortgage and
Security Agreement, (B) is written in an amount not less than the outstanding
principal amount of the indebtedness secured by the Mortgage and Security
Agreement which is reasonably allocable to such real property or the maximum
limit of coverage made available with respect to the particular type of property
under the National Flood Insurance Act of 1968, whichever is less, and (C) has a
term ending not later than the maturity of the Indebtedness secured by the
Mortgage and Security Agreement and (ii) confirmation that the Borrower has
received the notice required pursuant to Section 208(e)(3) of Regulation H of
the F.R.S. Board.

          SECTION 6.1.17  Insurance.  The Administrative Agent shall have
                          ---------
received a letter from J&H Marsh & McLennan relating to insurance matters and
copies of certificates from the Borrower's insurers or insurance agents
evidencing that the insurance policies in place satisfy the requirements of
Section 8.1.5.
- -------------

          SECTION 6.2  All Loans.  The obligation of each Lender to make any
                       ---------
Loan (including its initial Loan) shall be subject to the satisfaction of each
of the conditions precedent set forth in this Section 6.2.
                                              -----------

          SECTION 6.2.1  Representations and Warranties; No Default.  Both
                         ------------------------------------------
before and after giving effect to any Borrowing (but, if any Default of the
nature referred to in Section 9.1.5 shall have occurred with respect to any
                      ------------- 
other Indebtedness, without giving effect to the application, directly or
indirectly, of the proceeds of such Borrowing), the following statements shall
be true and correct:

                                      -39-
<PAGE>
 
          (a) the representations and warranties set forth in Article VII shall
                                                              -----------
     be true and correct in all material respects with the same effect as if
     then made (unless stated to relate solely to an earlier date, in which case
     such representations and warranties shall be true and correct as of such
     earlier date); and

          (b)  no Default or Event of Default has occurred and is continuing or
     would result from such Borrowing.

          SECTION 6.2.2  Borrowing Request.  The Administrative Agent shall have
                         -----------------
received a Borrowing Request for such Borrowing.  Each of the delivery of a
Borrowing Request and the acceptance by the Borrower of the proceeds of such
Borrowing shall constitute a representation and warranty by the Borrower that on
the date of such Borrowing (both immediately before and after giving effect to
such Borrowing and the application of the proceeds thereof) the statements made
in Section 6.2.1 are true and correct.
   -------------

          SECTION 6.2.3  Satisfactory Legal Form.  All documents executed or
                         -----------------------
submitted pursuant hereto by or on behalf of the Borrower shall be satisfactory
in form and substance to the Administrative Agent and its counsel.

                                  ARTICLE VII
                         REPRESENTATIONS AND WARRANTIES

          In order to induce the Administrative Agent and each Lender to enter
into this Agreement and to make Loans hereunder, the Borrower represents and
warrants unto the Administrative Agent and each Lender as set forth in this
Article VII.
- -----------

          SECTION 7.1  Financial Information.  (a)  The consolidated balance
                       ---------------------
sheet of the Borrower as at December 31, 1998, and the related consolidated
statements of income and cash flows of the Borrower, copies of which have been
furnished to the Administrative Agent, have been prepared in accordance with
GAAP consistently applied, and present fairly the consolidated financial
condition of the Borrower and its Subsidiaries as at the dates thereof and the
results of their operations for the periods then ended.

          (b)  The financial projections and other pro forma financial
                                                   ---------
information provided to the Lenders have been prepared in good faith and are
based upon reasonable assumptions.

          SECTION 7.2  Organization; Power.  Each Loan Party (a) is a
                       -------------------
corporation or limited partnership validly organized and existing and in good
standing under the laws of the state of its incorporation, (b) is duly qualified
to do business and is in good standing as a foreign corporation or limited
partnership in each jurisdiction where the nature of its business requires such
qualification and (c) has all requisite corporate or partnership power and
authority and holds all material requisite Governmental Approvals to enter into
and perform its Obligations under this

                                      -40-
<PAGE>
 
Agreement, the Notes and each other Loan Document and to conduct the business of
owning and operating the Generating Station and the sale and marketing of
wholesale electric power and other products and services related thereto,
except, with respect to clauses (b) and (c) above, where the failure to be so
                        -----------     ---
qualified or be in good standing or the failure to obtain such Governmental
Approvals would not, individually or in the aggregate, cause a Material Adverse
Effect.

          SECTION 7.3  Due Authorization; Non-Contravention.  The execution,
                       ------------------------------------
delivery and performance by each Loan Party of each Loan Document to which it is
a party are within such Loan Party's corporate or partnership powers, have been
duly authorized by all necessary corporate or partnership action, and do not:

          (a) contravene the Organic Documents of such Loan Party;

          (b) contravene any material Requirement of Law or Contractual
     Obligation, binding on or affecting such Loan Party; or

          (c) result in, or require the creation or imposition of, any Lien
     (other than pursuant to the Loan Documents) on any of the properties of
     such Loan Party.

          SECTION 7.4  Approvals.  (a)  All Governmental Approvals required in
                       ---------
connection with the transactions contemplated by the Loan Documents, the
Acquisition and the conduct of the business of each of the Loan Parties are
listed on Schedule 7.4 and have been duly obtained or made and are in full force
          ------------
and effect.  All such Governmental Approvals are final and any period for the
filing of notice of rehearing or application for judicial review of the issuance
of each such Governmental Approval has expired without any such notice or
application having been made, except as noted in Part B of Schedule 7.4.  No
                                                 ------    ------------
such Governmental Approval is the subject of any pending or, except as indicated
in Part C of Schedule 7.4,  threatened judicial or administrative proceeding.
   ------    ------------

          (b)  All consents and approvals required to be obtained from Persons
other than Governmental Authorities in connection with the transactions
contemplated by the Loan Documents and the Acquisition have been obtained and
are in full force and effect, other than such consents or approvals, the failure
of which to obtain, would not, individually or in the aggregate, cause a
Material Adverse Effect.

          SECTION 7.5  No Material Adverse Change.  Since January 24, 1999,
                       --------------------------
there has not occurred any event or condition having a Material Adverse Effect.

          SECTION 7.6  Accuracy of Information.  (a)  All factual information
                       -----------------------
heretofore or contemporaneously furnished by the Loan Parties and their
Affiliates in writing to the Administrative Agent or any Lender for purposes of
or in connection with this Agreement or any transaction contemplated hereby
(other than projections and other "forward-looking" information) is, and all
other such written factual information hereafter furnished by the Borrower in
writing to

                                      -41-
<PAGE>
 
the Administrative Agent or any Lender will be, true and materially accurate in
every material respect on the date as of which such information is dated or
certified, and such information is not, or shall not be, as the case may be,
incomplete by omitting to state any material fact necessary to make such
information not misleading. The information contained in the Information
Memorandum, dated at February 22, 1999, other than any opinions expressed in the
reports referred to in Section 6.1.9, was true and materially accurate in every
                       -------------
material respect on February 22, 1999, and on the Effective Date.

          (b)  All projections and other "forward-looking" information
heretofore or contemporaneously furnished by the Loan Parties and their
Affiliates in writing to the Administrative Agent or any Lender for the purposes
of or in connection with this Agreement or any transaction contemplated hereby
were prepared in good faith and are based on reasonable assumptions.

          SECTION 7.7  Validity.  Each Loan Document to which any Loan Party is
                       --------
a party constitutes, or, upon the due execution and delivery thereof by such
Loan Party, will constitute, the legal, valid and binding obligation of such
Loan Party enforceable in accordance with its terms (except as may be limited by
bankruptcy, insolvency or other similar laws affecting the enforcement of
creditors' rights generally and general principles of equity).

          SECTION 7.8  Compliance with Law and Contractual Obligations.  Each
                       -----------------------------------------------
Loan Party is in compliance with all Requirements of Law and Contractual
Obligations applicable to it, except to the extent that the failure to comply
therewith would not have a Material Adverse Effect.

          SECTION 7.9  Regulations T, U and X.  No Loan Party is engaged in the
                       ----------------------
business of extending credit for the purpose of purchasing or carrying margin
stock, and no proceeds of any Loans will be used for a purpose which violates,
or would be inconsistent with, F.R.S. Board Regulation T, U or X.  Terms for
which meanings are provided in F.R.S. Board Regulation T, U or X or any
regulations substituted therefor, as from time to time in effect, are used in
this Section with such meanings.

          SECTION 7.10  Litigation.  There is no pending or, to the knowledge of
                        ----------
the Borrower, threatened litigation, action, proceeding, investigation or labor
controversy affecting any Loan Party or any of its properties, businesses,
assets or revenues or affecting any Governmental Approval described by Section
                                                                       -------
7.4, which, if adversely determined  (taking into account any insurance proceeds
- ---
payable under a policy where the insurer has accepted coverage without any
reservations), would have a Material Adverse Effect or which purports to
adversely affect the legality, validity or enforceability of any Loan Document.

          SECTION 7.11  Ownership of Properties.  Each Loan Party owns good and
                        -----------------------
marketable title to, or a valid leasehold in or other enforceable interest in,
all properties and assets, real and personal, tangible and intangible, of any
nature whatsoever (including patents,

                                      -42-
<PAGE>
 
trademarks, trade names, service marks and copyrights) purported to be owned,
leased or held by it, free and clear of all Liens, charges or claims (including
infringement claims with respect to patents, trademarks, copyrights and the
like) except as permitted pursuant to Section 8.2.2.
                                      -------------

          SECTION 7.12  Taxes.  Each Loan Party has filed all tax returns and
                        -----
reports required by law to have been filed by it and has paid all taxes and
governmental charges thereby shown to be owing, except any such taxes or charges
which are being diligently contested in good faith by appropriate proceedings
and for which adequate reserves in accordance with GAAP shall have been set
aside on its books.

          SECTION 7.13  Investment Company Act; Public Utility Holding Company
                        ------------------------------------------------------
Act; Other Regulations.  (a)  The Borrower is not subject to any regulation as
- ----------------------
an "investment company" subject to the Investment Company Act of 1940, as
amended, and no Loan Party is a "holding company" or a "subsidiary company" or
an "affiliate" of a "holding company" under PUHCA, except that the Loan Parties
each are a "subsidiary company" of Edison International, which is a "holding
company" that is exempt from all regulation under PUHCA (except for Section
9(a)(2) thereof) pursuant to Section 3(a) thereof.  No Loan Party is or will be
subject to regulation as a "public utility", "public utility company", "public
utility holding company", "electric corporation" or a subsidiary or affiliate of
any of the foregoing under the laws of the State of Pennsylvania or the State of
New York.

          (b)  EME Homer City (i) is an "exempt wholesale generator" under
PUHCA, (ii) is a member of, or otherwise has the right and authority to sell
electric power and related products and services into, the NY Pool and PJM and
(iii) has the authority to sell wholesale electric power at market-based rates
(not subject to any price cap or other market power mitigation measure).

          SECTION 7.14  Environmental Warranties.  Except as could not,
                        ------------------------
individually or in the aggregate, be reasonably expected to have a Material
Adverse Effect:

          (a) (i)  All facilities and property owned, leased or operated by any
     Loan Party have been, and continue to be, owned, leased or operated by such
     Loan Party in compliance with all applicable Environmental Laws and (ii)
     the Loan Parties are, and within the period of all applicable statutes of
     limitation have been within the period of all applicable statutes of
     limitations, in compliance with all applicable Environmental Laws.

          (b) There are no pending or, to the knowledge of the Borrower,
     threatened (i) claims, complaints, notices or requests for information
     received by any Loan Party with respect to any alleged violation by such
     Loan Party of any applicable Environmental Law, or (ii) complaints, notices
     or inquiries to any Loan Party regarding potential liability under any
     applicable Environmental Law.

                                      -43-
<PAGE>
 
          (c) Hazardous Materials are not present at, on, under or about any
     property now or to the knowledge of the Borrower previously owned, leased
     or operated by any Loan Party.

          (d) Each Loan Party has obtained and is in compliance with all
     Governmental Approvals required under any Environmental Law necessary for
     such Loan Party's business.

          (e) No property now or previously owned, leased or operated by any
     Loan Party is listed or, to the knowledge of the Borrower, is proposed for
     listing on the National Priorities List pursuant to any Environmental Law,
     on the CERCLIS or on any similar state or local list of sites requiring
     investigation or clean-up.

          (f) To the knowledge of the Borrower, no conditions exist at, on,
     under or about any property now or previously owned or leased by any Loan
     Party or at any other location (including, without limitation, any location
     to which Hazardous Materials have been sent for re-use or for recycling or
     for treatment, storage or disposal) which, with the passage of time, or the
     giving of notice or both, would give rise to liability under any applicable
     Environmental Law.

          (g) Other than as provided in the Asset Purchase Agreement, no Loan
     Party has assumed or retained, by contract or operation of law, any
     liabilities of any kind, fixed or contingent, known or unknown, under any
     applicable Environmental Law.

          SECTION 7.15  The Obligations.  The Obligations are senior secured
                        ---------------
Indebtedness of the Loan Parties ranking at least pari passu with all other
                                                  ---------- 
senior secured Indebtedness of the Loan Parties.

          SECTION 7.16  Year 2000 Matters.  The Borrower has reviewed its
                        -----------------
operations and those of the other Loan Parties with a view to assessing whether
its businesses or the businesses of any of such other Loan Parties will, in the
receipt, transmission, processing, manipulation, storage, retrieval,
retransmission or other utilization of data, be vulnerable to a Year 2000
Problem or will be vulnerable to the effects of a Year 2000 Problem suffered by
any of the Loan Parties' major commercial counter-parties.  Based on such review
the Borrower has no reason to believe that a Material Adverse Effect will occur
with respect to its businesses or operations or the businesses or operations of
any of the other Loan Parties resulting from a Year 2000 Problem.

          SECTION 7.17  Pension and Welfare Plans.  During the consecutive
                        -------------------------
twelve-month period prior to each date as of which the following representations
are made or deemed made, and prior to the date of any Borrowing hereunder, no
steps have been taken to terminate any Pension Plan; no contribution failure has
occurred with respect to any Pension Plan sufficient to give rise to a Lien
under Section 302(f) of ERISA or Section 412 of the Code; no condition exists or
event or transaction has occurred with respect to any Pension Plan which could
reasonably be expected to result in the incurrence by any Loan Party or any
member of the Controlled Group of any

                                      -44-
<PAGE>
 
material liability (other than liabilities incurred in the ordinary course of
maintaining the Pension Plan), fine or penalty and none of the following events
or conditions, either individually or in the aggregate, has resulted or is
reasonably likely to result in a material liability to any Loan Party or any
member of the Controlled Group:  (i) a Reportable Event; (ii) a complete or
partial withdrawal from any Multiemployer Plan by any Loan Party or any member
of the Controlled Group; (iii) any liability of the Loan Parties or any member
of the Controlled Group under ERISA if the any Loan Party or any member of the
Controlled Group were to withdraw completely from all Multiemployer Plans as of
the annual valuation date most closely preceding the date on which this
representation is made or deemed made; or (iv) the Reorganization or Insolvency
of any Multiemployer Plan.  Neither any Loan Party nor any member of the
Controlled Group has any contingent liability with respect to any post-
retirement benefit under a Welfare Plan which could reasonably be expected to
have a Material Adverse Effect, other than liability for continuation coverage
described in Part 6 of Title I of ERISA.

          SECTION 7.18  Subsidiaries.  Except as otherwise disclosed on Schedule
                        ------------                                    --------
7.18, the Borrower has no Subsidiaries or Investments in other Persons.
- ----

                                  ARTICLE VIII
                                   COVENANTS

          SECTION 8.1  Affirmative Covenants.  The Borrower agrees with the
                       ---------------------
Administrative Agent and each Lender that, until the Commitments have terminated
and all Obligations have been paid and performed in full, the Borrower shall,
and shall cause each of the other Loan Parties to, perform the obligations set
forth in this Section 8.1.
              ----------- 

          SECTION 8.1.1  Financial Information, Reports, Notices.  The Borrower
                         ---------------------------------------
shall furnish, or shall cause to be furnished, to the Administrative Agent
copies of the following financial statements, reports, notices and information:

          (a) as soon as available and in any event within 60 days after the end
     of each of the first three Fiscal Quarters of each Fiscal Year of the
     Borrower, consolidated balance sheets of the Borrower (which will include
     results for its consolidated subsidiaries) as of the end of such Fiscal
     Quarter and consolidated statements of income and cash flows of the
     Borrower (which will include results for its consolidated subsidiaries) for
     such Fiscal Quarter and for the period commencing at the end of the
     previous Fiscal Year and ending with the end of such Fiscal Quarter,
     certified by an Authorized Representative of the Borrower with
     responsibility for financial matters;

          (b) as soon as available and in any event within 120 days after the
     end of each Fiscal Year of the Borrower, commencing with the 1999 Fiscal
     Year, a copy of the annual audit report for such Fiscal Year for the
     Borrower (which will include results for its consolidated subsidiaries),
     including therein consolidated balance sheets of the Borrower

                                      -45-
<PAGE>
 
     (which will include results for its consolidated subsidiaries) as of the
     end of such Fiscal Year and consolidated statements of income and cash
     flows of the Borrower (which will include results for its consolidated
     subsidiaries) for such Fiscal Year, and accompanied by the opinion of
     Arthur Andersen & Co. or other internationally recognized independent
     auditors selected by the Borrower, which report shall state that such
     consolidated financial statements present fairly in all material respects
     the financial position for the periods indicated in conformity with GAAP
     applied on a basis consistent with prior periods;

          (c) concurrently with the delivery of the financial statements
     referred to in Section 8.1.1(b), either: (i) the annual report provided to
                    ----------------  
     senior management and shareholders of the Borrower for the preceding
     calendar year with respect to the Generating Station, or (ii) a report for
     the preceding calendar year with respect to the Generating Station covering
     the following matters:  (A) production, including availability, output,
     planned outages and unplanned outages (and the reason for such unplanned
     outages); (B) environmental matters; (C) health and safety matters, to the
     extent the same shall have given rise to material claims against any Loan
     Party; (D) implementation of the Environmental Capital Expenditure Program;
     (E) significant plant activities, such as major plant overhauls,
     alterations, modifications and other capital expenditures, significant
     changes in plant operations and major operating incidents; and (F) market
     activities, including quantum and average price of energy and capacity
     delivered by the Generating Station to the NY Pool and PJM;

          (d) concurrently with the delivery of the financial statements
     referred to in Section 8.1.1(b), an operating budget for the Generating
                            --------
     Station for the current calendar year, together with, in the case of each
     calendar year beginning with the year 2000, an "income statement variance
     report" showing the actual experience for the preceding calendar year (or
     portion thereof) against the income statement projections for the preceding
     calendar year (or portion thereof);

          (e) on each Quarterly Payment Date on which the Borrower intends to
     make any Investment pursuant to Section 8.2.5(b) or any Restricted Payment
                                     ----------------
     pursuant to clause (b) of the proviso contained in Section 8.2.7 and,
                                                        -------------
     commencing July 1, 1999, within 60 days after each other Quarterly Payment
     Date, a certificate, executed by an Authorized Representative of the
     Borrower with responsibility for financial matters, showing (i) the actual
     Debt Service Coverage Ratio for the 12-month period ended on the last day
     of the immediately preceding Fiscal Quarter, (ii) the projected Debt
     Service Coverage Ratio for the 12-month period commencing on the first day
     of the then current Fiscal Quarter  and (iii) the projected Debt Service
     Coverage Ratio for the 12-month period commencing on the first anniversary
     of the first day of the then current Fiscal Quarter, in each case, in
     reasonable detail with appropriate calculations and computations and, in
     the case of projections, calculated on the basis of stated assumptions
     reasonably acceptable to the Administrative Agent;

                                      -46-
<PAGE>
 
          (f) as soon as possible and in any event within five Business Days
     after any Authorized Representative of the Borrower obtains knowledge of
     the occurrence of (i) each Default under this Agreement and (ii) any
     default under any other material agreement to which the any Loan Party is a
     party or any termination thereof, a statement of such Authorized
     Representative setting forth details of such Default, default or
     termination and the action which such Loan Party has taken and proposes to
     take with respect thereto;

          (g) as soon as possible and in any event within five Business Days
     after (i) the commencement of, or the occurrence of any material adverse
     development with respect to, any litigation, action, proceeding, or labor
     controversy of the type described in Section 7.10 or (ii) the commencement
                                          ------------
     of any labor controversy, litigation, action, proceeding of the type
     described in Section 7.10, notice thereof and, upon request of the
                  ------------
     Administrative Agent, copies of all documentation relating thereto (other
     than documentation subject to the attorney-client privilege);

          (h) promptly after the sending or filing thereof, copies of all
     reports and registration statements which the Borrower files with the
     Securities and Exchange Commission or any national securities exchange;

          (i) immediately upon becoming aware of the institution of any steps by
     the Borrower or any other Person to terminate any Pension Plan (other than
     a standard termination under ERISA Section 4041(b)), or the failure to make
     a required contribution to any Pension Plan if such failure is sufficient
     to give rise to a Lien under Section 302(f) of ERISA or Section 412 of the
     Code, or the taking of any action with respect to a Pension Plan which
     could result in the requirement that the Borrower furnish a bond or other
     security to the PBGC or such Pension Plan, or the occurrence of any event
     with respect to any Pension Plan which could result in the incurrence by
     the Borrower or any member of the Controlled Group of any material
     liability (other than liabilities incurred in the ordinary course of
     maintaining the Pension Plan), fine or penalty, or any increase in the
     contingent liability of the Borrower with respect to any post-retirement
     Welfare Plan benefit the occurrence or expected occurrence of any
     Reportable Event or the termination, Reorganization or Insolvency of any
     Multiemployer Plan or the complete or partial withdrawal by any Loan Party
     or any member of the Controlled Group from a Multiemployer Plan, notice
     thereof and copies of all documentation relating thereto;

          (j) as soon as possible and in any event within five Business Days
     after any Authorized Representative of the Borrower obtains  knowledge of
     the occurrence or notice of any changes in Borrower's Debt Rating by
     Moody's or S&P or any other rating agency which maintains a Debt Rating on
     the Borrower which is used in determining the Applicable Margin;

                                      -47-
<PAGE>
 
          (k) within ten Business Days after each anniversary of the Effective
     Date, a certificate from EME Homer City's insurers or insurance agents
     evidencing that the insurance policies in place satisfy the requirements of
     Section 8.1.5;
     -------------

          (l) as soon as possible and in any event within five Business Days
     after any Authorized Representative of the Borrower obtains (i) knowledge
     of the occurrence, notice of any casualty, damage or loss to the Generating
     Station, whether or not insured, through fire, theft, other hazard or
     casualty, involving a probable loss of $3,000,000 or more or (ii) knowledge
     of the occurrence, notice of any cancellation, notice of threatened or
     potential cancellation or material change in the terms, coverage or amounts
     of any policy of insurance required to be maintained pursuant to Section
                                                                      -------
     8.1.5;
     -----

          (m) as soon as possible and in any event within five Business Days
     after any Authorized Representative of the Borrower obtains knowledge of
     the occurrence, notice of any material modification of the Environmental
     Capital Expenditure Program; and

          (n) as soon as possible and in any event within five Business Days
     after any Authorized Representative of the Borrower obtains knowledge of
     the occurrence, notice that any Governmental Authority may revoke, or
     refuse to grant or renew, or materially modify, any material Governmental
     Approval held or sought by any Loan Party.

          SECTION 8.1.2  Continuation of Business and Maintenance of Existence.
                         -----------------------------------------------------
The Borrower shall, and shall cause each of the other Loan Parties to, continue
to engage in business of owning and operating the Generating Station and the
sale and marketing of wholesale electric power and other products and services
related thereto, and preserve, renew and keep in full force and effect its
corporate or partnership existence and take all reasonable action to maintain
all material rights, privileges and franchises necessary or desirable in the
normal conduct of its business, except, in each case, as otherwise permitted by
Section 8.2.3.
- -------------

          SECTION 8.1.3  Compliance with Requirements of Law and Contractual
                         ---------------------------------------------------
Obligations and Laws.  The Borrower shall, and shall cause each of the other
- --------------------
Loan Parties to, comply with all Requirements of Law and Contractual
Obligations, such compliance to include the payment, before the same become
delinquent, of all taxes, assessments and governmental charges or levies, except
to the extent non-compliance would not have a Material Adverse Effect.

          SECTION 8.1.4  Maintenance of Generating Station.  The Borrower shall,
                         ---------------------------------
and shall cause EME Homer City to, (a) maintain the Generating Station in all
material respects (i) in good condition, repair and working order (ordinary wear
and tear excepted), except where the failure so to do would not have a Material
Adverse Effect, (ii) in accordance with Prudent Industry Practice, (iii) in
compliance with all material Requirements of Law and (iv) in accordance with the
terms of all insurance policies required to be maintained pursuant to Section
                                                                      -------
8.1.5, and (b) make such repairs, renewals, replacements, betterments and
- -----
improvements to the Generating

                                      -48-
<PAGE>
 
Station as in the reasonable judgment of the Borrower and EME Homer City are
necessary so that the Generating Station may be operated in accordance with its
intended purpose.

          SECTION 8.1.5  Insurance.  (a) The Borrower shall cause EME Homer City
                         ---------
to maintain or cause to be maintained with financially sound and reputable
insurance companies, insurance for such amounts against such risks, loss, damage
and liability as are customarily insured against by other enterprises of like
size and type as that of the Generating Station, subject to the availability of
such coverage on commercially reasonable terms, all on terms and conditions
which are in accordance with good industry practice and, in any event, including
the insurance described on Schedule 8.1.5, provided that where deviations
                           --------------  --------
therefrom are based upon commercial unavailability, the same shall be
satisfactory to the Administrative Agent (with such substitute insurance
coverage being the most equivalent to the required coverage that is available on
commercially reasonable terms):

          (b) All such policies of insurance shall:

          (i) provide that, except in the case of third party liability
     insurance, the Collateral Agent shall be named as loss payee and the
     insurer shall waive any rights of subrogation against the Secured Parties;

          (ii) with respect to third party liability insurance, the Secured
     Parties shall be named as additional insureds;

          (iii)  provide that (A) no cancellation or termination of such
     insurance, (B) no reduction in the scope of coverage or the limits of
     liability of such insurance and (C) no change in the applicable provisions
     required by this subsection shall be effective for 30 days after notice is
     given by the insurers to the Administrative Agent and the Collateral Agent
     of such cancellation, termination, reduction or change;

          (iv) waive all claims for insurance premiums or commissions or
     additional premiums or assessments against the Secured Parties;

          (v) provide that such insurance shall be primary insurance and that
     the insurers under such insurance policies shall be liable under such
     policies without right of contribution from any other insurance coverage
     effected by the Secured Parties under any other insurance policies with any
     other insurance companies covering a loss which is also covered under the
     insurance policies maintained by EME Homer City pursuant to this
     subsection; and

          (vi) waive any right of the insurers to setoff or counterclaim or to
     make any other deductions, whether by way of attachment or otherwise, as
     against the Secured Parties, and provide that, in respect of the interest
     of the Secured Parties, the insurance afforded by the policies shall not be
     invalidated by any action or inaction of an insured and

                                      -49-
<PAGE>
 
     shall insure the Secured Parties' interest, as it appears, regardless of
     any breach or violation by the insured of any warranties, declarations or
     conditions contained in such policies.

          SECTION 8.1.6  Books and Records.  The Borrower shall, and shall cause
                         -----------------
each of the other Loan Parties to, keep books and records which accurately
reflect all of its business affairs and transactions and permit the
Administrative Agent and each Lender or any of their respective representatives
(at the Administrative Agent's or such Lender's expense), at reasonable times
and intervals upon reasonable prior notice, to visit all of its offices and
sites, to discuss its financial matters with its officers and independent public
accountant.  The Borrower shall, at any reasonable time and from time to time
upon reasonable prior notice, permit the Administrative Agent and the Lenders or
any of their respective agents or representatives to examine and make copies of
and abstracts from the records and books of account of the Loan Parties;
provided that by virtue of this Section 8.1.6 the Borrower shall not be deemed
- --------                        -------------
to have waived any right to confidential treatment of the informational
obtained, subject to the provisions of applicable law or court order.

          SECTION 8.1.7  Year 2000 Matters.  The Borrower shall, and shall cause
                         -----------------
each of the other Loan Parties to, ensure that its computer based systems are
able to effectively process data including dates on and after January 1, 2000.

          SECTION 8.1.8  Environmental Covenant.  The Borrower shall, and shall
                         ----------------------
cause each of the other Loan Parties to, and shall take all reasonable efforts
to, ensure that all of its or such other Loan Parties' tenants, subtenants,
contractors, subcontractors and invitees shall:

          (a) comply with all applicable Environmental Laws, obtain, comply with
     and maintain all necessary Governmental Approvals required under any
     applicable Environmental Law, except where noncompliance, individually or
     in the aggregate, could not reasonably be expected to result in a Material
     Adverse Effect;

          (b) promptly upon the Administrative Agent's request if there has been
     an Event of Default which has not been fully and timely cured, permit an
     environmental consultant whom the Administrative Agent in its discretion
     designates to perform an environmental assessment (including, reviewing
     documents; interviewing knowledgeable employees and representatives of the
     Borrower; and sampling and analyzing soil, air, surface water, groundwater,
     and/or other media in or about property owned or leased by the Borrower, or
     on which operations of the Borrower otherwise take place).  Such
     environmental assessment shall be in form, scope and substance reasonably
     satisfactory to the Administrative Agent.  The Borrower shall cooperate
     fully in the conduct of such environmental assessment upon written demand
     by the Administrative Agent.  The Administrative Agent shall perform, or
     cause its agents and representatives to perform, the environmental
     assessment in such a manner as to minimize to the extent practicable any
     disruption with the conduct of operations of the involved property.
     Pursuant to this

                                      -50-
<PAGE>
 
          Section 8.1.8(b), the Administrative Agent shall have the right, but
          ----------------
     shall not have any duty, to request and/or obtain such environmental
     assessment; and

          (c) provide copies of such information to evidence compliance with
     this Section 8.1.8 as the Administrative Agent may reasonably request from
          -------------
     time to time.

          SECTION 8.1.9  Further Assurances.  Upon the request of the
                         ------------------
Administrative Agent, the Borrower shall, and shall cause each of the other Loan
Parties to, promptly perform or cause to be performed any and all acts and
execute or cause to be executed any and all documents (including, financing
statements and continuation statements) for filing under the provisions of the
Uniform Commercial Code or any other Requirement of Law which are necessary or
advisable to maintain in favor of the Collateral Agent, for the benefit of the
Secured Parties, Liens on the Collateral that are duly perfected in accordance
with all applicable Requirements of Law.

          SECTION 8.1.10  Additional Collateral.  With respect to any assets
                          ---------------------
acquired after the Effective Date by any Loan Party that are intended to be
subject to the Lien created by any of the Security Documents but which are not
so subject, promptly (and in any event within 30 days after the acquisition
thereof):  (a) execute and deliver to the Collateral Agent such amendments to
the relevant Security Documents or such other documents as the  Administrative
Agent shall deem necessary or advisable to grant to the Collateral Agent, for
the benefit of the Secured Parties, a Lien on such assets; and (b) take all
actions necessary or advisable to cause such Lien to be duly perfected in
accordance with all applicable Requirements of Law, including the filing of
financing statements in such jurisdictions as may be requested by the
Administrative Agent.

          SECTION 8.1.11  Use of Proceeds.  (a)  The Borrower shall use the
                          ---------------
proceeds of the 364-Day Term Loans to finance a portion of the Acquisition.

          (b)  The Borrower shall use the proceeds of the Construction Term
Loans to finance costs associated with certain pollution control equipment to be
installed in the Generating Station pursuant to the Environmental Capital
Expenditure Program.

          (c)  The Borrower shall use the proceeds of the Revolving Loans for
general working capital purposes.

          SECTION 8.1.12  Recovery Events.  Not more than 30 days after the
                          ---------------
occurrence of any Recovery Event, the Borrower shall give notice thereof to the
Administrative Agent and the Collateral Agent and follow the procedures
indicated below as applicable:

          (a) if the settlement or payment related to such Recovery Event is
     under $50,000,000, the Borrower shall, or shall cause EME Homer City to,
     apply the Net Cash Proceeds of such Recovery Event to the payment of the
     cost of restoration or replacement of the asset or assets in respect of
     which such Recovery Event occurred within 12 months from the date of
     receipt of such proceeds, provided that the Administrative Agent and the
                               --------

                                      -51-
<PAGE>
 
     Collateral Agent receive from the Borrower, within 45 days of the Recovery
     Event, a notice (a "Reinvestment Notice") executed by an Authorized
                         -------------------
     Representative of the Borrower (i) setting forth in reasonable detail the
     nature of such restoration or replacement and the estimated cost and time
     to complete such restoration or replacement and (ii) stating that (A) no
     Default or Event of Default has occurred and is continuing, (B) such
     restoration or replacement is technologically and economically feasible,
     (C) the Net Cash Proceeds of such Recovery Event, together with other
     resources available to the Borrower or EME Homer City, are sufficient to
     pay the estimated cost of completing such restoration or replacement and
     (D) the Borrower has sufficient resources (through business interruption
     insurance or otherwise) to pay all Debt Service projected to become due and
     payable prior to the completion of such restoration or replacement; or

          (b) if the settlement or payment related to such Recovery Event is
     $50,000,000 or more, then no later than six months following such
     occurrence, the Borrower shall either:

               (i) make a prepayment of all Net Cash Proceeds of such Recovery
          Event pursuant to Section 3.1.2(b); or
                            ---------------

               (ii) deliver to the Administrative Agent and the Collateral
          Agent:  (A) a Reinvestment Notice confirming the Borrower's decision
          to apply the Net Cash Proceeds of such Recovery Event to the payment
          of the cost of restoration or replacement of the asset or assets in
          respect of which such Recovery Event occurred; and (B) a report of an
          independent engineer, such engineer and such report to be satisfactory
          to the Administrative Agent, confirming the information set forth in
          clauses (i) and (ii)(B) of the Borrower's Reinvestment Notice relating
          thereto.

          SECTION 8.2  Negative Covenants.  The Borrower agrees with the
                       ------------------
Administrative Agent and each Lender that, until the Commitments have terminated
and all Obligations have been paid and performed in full, the Borrower will, and
will cause each of the other Loan Parties to, perform the obligations set forth
in this Section 8.2.
        -----------

          SECTION 8.2.1  Restrictions on Indebtedness.  The Borrower shall not,
                         ---------------------------- 
and shall not permit any other Loan Party to, create, incur, assume or suffer to
exist any Indebtedness other than:

          (a) Capitalized Lease Liabilities entered into by EME Homer City in
     the ordinary course of business not to exceed at any time an aggregate
     principal amount equal to $10,000,000;

          (b) Indebtedness of the Borrower under Interest Rate Hedging
     Transactions entered into with respect to the Loans with any Lender;

                                      -52-
<PAGE>
 
          (c) Indebtedness of the Borrower incurred after repayment of the 364-
     Day Term Loans and the termination of the 364-Day Term Loan Commitments,
     provided that(i) the Borrower shall have delivered to the Lenders a pro
     --------                                                            ---
     forma calculation of the Debt Service Coverage Ratio for the preceding 12-
     -----
     month period (or, if such calculation is being delivered prior to the first
     anniversary of the Effective Date, for such shorter period of not less than
     six months) indicating that, had such Indebtedness been outstanding and had
     the maximum amount of Indebtedness available to be drawn under the
     Commitments been outstanding during such period, the Debt Service Coverage
     Ratio for such period would have been greater than 2.75 to 1.00 and (ii)
     the Borrower shall have received written confirmation that the incurrence
     of such Indebtedness would not result in a downgrade of the Borrower's
     senior secured Debt Rating below BBB- or Baa3 from S&P and Moody's,
     respectively;

          (d) Indebtedness consisting of reimbursement obligations of any Loan
     Party with respect of (i) letters of credit, surety bonds and performance
     bonds used by such Loan Party in the ordinary course of business in an
     aggregate amount not to exceed $15,000,000 at any time, or (ii) letters of
     credit used by the Borrower to meet the Debt Service Reserve Requirement or
     analogous requirements in connection with the incurrence of any
     Indebtedness described in clause (e) below; provided that the aggregate
                               ---------         --------
     amount of outstanding reimbursement obligations of all Loan Parties under
     this clause (d) shall not be in excess of $65,000,000 at any time;
          ----------

          (e) Indebtedness of the Borrower incurred to refinance the 364-Day
     Term Loans or any other existing Indebtedness of the Borrower, provided
                                                                    --------
     that either: (i) (A) the average life of such Indebtedness shall not be
     less than, in the case of Indebtedness incurred to refinance the 364-Day
     Term Loans, 5 years, or, in the case of Indebtedness incurred to refinance
     other Indebtedness of the Borrower, the average life of the Indebtedness so
     refinanced and (B) the principal amount of such Indebtedness shall not
     exceed the amount of the Indebtedness so refinanced, plus an amount for
     fees and expenses of issuance, provided, further, in the case of
                                    --------  -------
     Indebtedness incurred to refinance the 364-Day Term Loans, the principal
     amount of such Indebtedness may exceed the aggregate principal amount of
     the 364-Day Term Loan by an amount up to $75,000,000, inclusive of an
     amount for fees and expenses of issuance, so long as (i) (A) the amount
     available to be drawn under the EME Credit Support Guarantee is increased
     by an amount equal to the amount by which the Borrower's projected Cashflow
     Available for Debt Service for the period from the anticipated date of
     incurrence of such Indebtedness through December 31, 2001, would need to be
     increased in order for the projected Debt Service Coverage Ratio for such
     period to equal 2.00 to 1.00 and (B) the Borrower shall have received
     written confirmation that such Indebtedness is rated at BBB- or Baa3 or
     better from S&P and Moody's, respectively; or (ii) (A) the Borrower shall
     have delivered to the Lenders a pro forma calculation of the Debt Service
                                     --- ----- 
     Coverage Ratio for the preceding 12-month period (or, if such calculation
     is being delivered prior to the first anniversary of the Effective Date,
     for such shorter period of not less than six months)

                                      -53-
<PAGE>
 
     indicating that, had such Indebtedness been outstanding and had the maximum
     amount of Indebtedness available to be drawn under the Commitments been
     outstanding during such period, the Debt Service Coverage Ratio for such
     period would have been greater than2.75 to 1.00 and (B) the Borrower shall
     have received written confirmation that such Indebtedness is rated BBB- or
     Baa3 or better from S&P and Moody's, respectively;

          (f) Indebtedness in the form of subordinated, unsecured intercompany
     loans between the Loan Parties that is subject to the Intercompany Loan
     Subordination Agreement;

          (g) Indebtedness in the form of guarantees made by the Borrower in the
     ordinary course of business related to the Generating Station in connection
     with (i) fuel procurement or sales, (ii) purchases, sales or exchanges made
     by Affiliates of the Borrower related to physical capacity and energy from
     the Generating Station and financial instruments related thereto and (iii)
     purchases, sales or exchanges of energy or emissions credits, so long as,
     in the case of each of clauses (i), (ii)  and (iii) above, such activities
                            ----------------        --- 
     are not entered into for speculative purposes; and

          (h) other unsecured Indebtedness of the Loan Parties not to exceed
     $20,000,000 in the aggregate outstanding at any time.

          SECTION 8.2.2  Liens.  The Borrower shall not, and shall not permit
                         -----
any other Loan Party to, create, incur, assume or suffer to exist any Lien upon
any of such Loan Party's respective property, revenues or assets, whether now
owned or hereafter acquired, except:

          (a) Liens for taxes, assessments or other governmental charges or
     levies not at the time delinquent or thereafter payable without penalty or
     which are being diligently contested in good faith by appropriate
     proceedings and for which adequate reserves in accordance with GAAP shall
     have been set aside on its books;

          (b) Liens of carriers, warehousemen, mechanics, materialmen and
     landlords incurred in the ordinary course of business for sums not overdue
     or which are being diligently contested in good faith by appropriate
     proceedings and for which adequate reserves in accordance with GAAP shall
     have been set aside on its books;

          (c) Liens incurred in the ordinary course of business in connection
     with workmen's compensation, unemployment insurance or other forms of
     governmental insurance or benefits;

          (d) Liens granted as security for the performance of tenders,
     statutory obligations, leases and contracts (other than for borrowed money)
     entered into in the ordinary course of business or to secure obligations on
     surety or appeal bonds;

                                      -54-
<PAGE>
 
          (e) easements, rights-of-way, restrictions and other similar
     encumbrances incurred in the ordinary course of business which, in the
     aggregate, are not substantial in amount and which 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 such Loan
     Party;

          (f) judgment Liens in existence less than 30 days after the entry
     thereof or with respect to which execution has been stayed or the payment
     of which is covered in full (subject to a customary deductible) by
     insurance maintained with responsible insurance companies;

          (g) extensions or renewals of any Lien otherwise permitted to be
     incurred under this Section 8.2.2 securing Indebtedness in an amount not
                         -------------
     exceeding the principal amount of, and accrued interest on, the
     Indebtedness secured by such Lien as so extended or renewed at the time of
     such extension or renewal; provided that such Lien shall apply only to the
                                --------
     same property theretofore previously securing such Indebtedness;

          (h) Liens, title defects and adverse claims that neither individually
     nor in the aggregate materially diminish the use or value of the Loan
     Party's property affected thereby;

          (i) Liens created pursuant to the Loan Documents; and

          (j) Liens securing Indebtedness permitted by Section 8.2.1(b), (c) or
                                                       ---------------------
     (e).
     ---

          SECTION 8.2.3  Consolidation, Merger.  The Borrower shall not, and
                         ---------------------
shall not permit any other Loan Party to, liquidate or dissolve, consolidate
with, or merge into or with, any other Person, or purchase or otherwise acquire
all or substantially all of the assets of any Person (or of any division
thereof), except, provided that no Default or Event of Default is then
                  --------
continuing or would occur after giving effect thereto (including, without
limitation, a Change in Control), the Borrower may consolidate with or merge
into any other Person if the Borrower is the surviving corporation.

          SECTION 8.2.4  Asset Dispositions.  The Borrower shall not, and shall
                         ------------------
not permit any other Loan Party to, sell, transfer, lease, contribute or
otherwise convey, or grant options, warrants or other rights with respect to,
all or any substantial part of its assets (including accounts receivable and
capital stock of or other ownership interests in Subsidiaries) to any Person,
unless:

          (a) such sale, transfer, lease, contribution or conveyance is in the
     ordinary course of its business, including sales of worn-out or obsolete
     equipment; or

          (b) the net book value of all such assets, together with the net book
     value of all other assets sold, transferred, leased, contributed or
     conveyed otherwise than in the

                                      -55-
<PAGE>
 
     ordinary course of business by any Loan Party pursuant to this Section
                                                                    -------
     8.2.4(b) during the most recent consecutive four quarter period since the
     --------
     Effective Date, does not exceed $10,000,000 in the aggregate;

provided, however, that notwithstanding anything to the contrary contained
- --------  -------
herein, any Loan Party may sell or otherwise dispose of (i) assets as and to the
extent necessary to comply with Requirements of Law and (ii) Cash Equivalent
Investments and provided, further, that any sale or disposition of assets
                --------  -------
pursuant to clause (ii) of this proviso shall not be included in the calculation
            -----------
of the aggregate net book value of assets sold pursuant to this Section 8.2.4.
                                                                --------------

          SECTION 8.2.5  Subsidiaries, Investments.  The Borrower shall not
                         -------------------------
create or acquire any Subsidiaries other than those identified on Schedule 7.18.
                                                                  --------------
The Borrower shall not, and shall not permit any other Loan Party to, create or
acquire or, make, incur, assume or suffer to exist any Investment in any other
Person, except:

          (a) Investments in EME Homer City for purposes of enabling it to
     implement the Environmental Capital Expenditure Program;

          (b) Investments in EME Homer City on any Quarterly Payment Date for
     purposes of enabling it to make other capital expenditures for improvements
     to the Generating Station, provided that (i) no Default or Event of Default
                                --------
     shall be in existence or shall occur after giving effect to the making of
     such Investment, (ii) the actual Debt Service Coverage Ratio for the 12-
     month period (or, in the case of Investments proposed to be made prior to
     April 1, 2000, such shorter period commencing April 1, 1999, and) ended on
     the last day of the immediately preceding Fiscal Quarter, (iii) the
     projected Debt Service Coverage Ratio for the 12-month period commencing on
     the first day of the then current Fiscal Quarter, (iv) the projected Debt
     Service Coverage Ratio for the 12-month period commencing on the first
     anniversary of the first day of the then current Fiscal Quarter, in each
     case shall be no less than 1.50 to 1.00 through December 31, 2001, and 1.70
     to 1.00 thereafter, (v) the Debt Service Reserve Requirement is satisfied
     and (vi) any debt service reserve requirement then applicable to Senior
     Debt other than the Loans is satisfied; and

          (c) Cash Equivalent Investments, provided that any Investment which
                                           --------
     when made complies with the requirements of the definition of the term
     "Cash Equivalent Investment" may continue to be held notwithstanding that
      --------------------------
     such Investment if made thereafter would not comply with such requirements.

          SECTION 8.2.6  Transactions with Affiliates.  The Borrower shall not,
                         ----------------------------
and shall not permit any other Loan Party to, enter into, or cause, suffer or
permit to exist, any arrangement or contract with any of their respective
Affiliates unless such arrangement or contract is (i) fair and reasonable to the
Borrower or such other Loan Party and is an arrangement or contract of the kind
which would be entered into by a prudent Person in the position of the Borrower
or such

                                      -56-
<PAGE>
 
other Loan Party with a Person which is not one of its Affiliates and (ii)
transactions otherwise permitted under Section 8.2.  The Borrower shall not
                                       -----------
permit EME Homer City to amend, supplement or otherwise modify the Energy Sales
Agreement without the written consent of the Required Lenders, which consent
shall not be unreasonably withheld.

          SECTION 8.2.7  Restricted Payments.  The Borrower shall not, and shall
                         -------------------
not permit any other Loan Party to, 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 shares of any class of capital stock of or other ownership
interest in any Loan Party or any warrants or options to purchase any such stock
or ownership interest, 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 any Loan Party (such declarations, payments,
setting apart, purchases, redemptions, defeasances, retirements, acquisitions
and distributions being herein called "Restricted Payments"); provided,
                                       -------------------    --------
however, that:  (a) any Subsidiary of the Borrower may make Restricted Payments
- -------
to the Borrower or any wholly owned Subsidiary of the Borrower; and (b) the
Borrower may make Restricted Payments in respect of its capital stock on any
Restricted Payment Date if:  (i) the Borrower has paid all amounts then due and
payable in respect of the Senior Debt; (ii) no Default or Event of Default shall
have occurred and be continuing or will occur after giving effect to the making
of such payment; (iii) (A) the actual Debt Service Coverage Ratio for the 12-
month period (or, in the case of Restricted Payments proposed to be made prior
to April 1, 2000, such shorter period commencing April 1, 1999, and) ended on
the last day of the immediately preceding Fiscal Quarter, (B) the projected Debt
Service Coverage Ratio for the 12-month period commencing on the first day of
the then current Fiscal Quarter and (C) the projected Debt Service Coverage
Ratio for the 12-month period commencing on the first anniversary of the first
day of the then current Fiscal Quarter, in each case shall be no less than 1.50
to 1.00 through December 31, 2001, and 1.70 to 1.00 thereafter; (iv) the Debt
Service Reserve Requirement is satisfied; and (v) any debt service reserve
requirement then applicable to Senior Debt other than the Loans is satisfied.

          SECTION 8.2.8  ERISA.  The Borrower shall not, and shall not permit
                         -----
any other Loan Party to, engage in any prohibited transactions under Section 406
of ERISA or under Section 4975 of the Code, which would subject the Borrower or
such other Loan Party to any tax, penalty or other liabilities that, in each
case, would have a Material Adverse Effect.

          SECTION 8.2.9  Restrictive Agreements.  The Borrower shall not, and
                         ----------------------
shall not permit any other Loan Party to, enter into any agreement (excluding
any Loan Document and any agreement governing any Indebtedness permitted by
clause (b) of Section 8.2.1 as to the assets financed with the proceeds of such
- ----------    -------------
Indebtedness) prohibiting:

          (a) the ability of the Borrower to amend or otherwise modify any Loan
Document; or

                                      -57-
<PAGE>
 
          (b) the ability of any Loan Party other than the Borrower to make any
     payments, directly or indirectly, to the Borrower by way of dividend,
     advances, repayments of loans or advances, reimbursements of management and
     other intercompany charges, expenses and accruals or other returns on
     investments, or any other agreement or arrangement which restricts the
     ability of any such Loan Party to make any payment, directly or indirectly,
     to the Borrower where such prohibition or restriction has a Material
     Adverse Effect.

          SECTION 8.2.10  Limitation on Lines of Business.  The Borrower shall
                          -------------------------------
not, and shall not allow any other Loan Party to, change its legal form or
Organic Documents, change its Fiscal Year or engage in any business other than
the ownership, maintenance and operation of Generating Station, the sale of
wholesale electric power therefrom and related products and services and such
other business as may be reasonably incidental thereto.

          SECTION 8.2.11  Regulation of Parties.  The Borrower shall not, and
                          ---------------------
shall not permit any other Loan Party to, take any action which could reasonably
be expected to result in (a) any Loan Party (i) being subject to regulation as a
"public utility", "public utility company", "public utility holding company",
"electric corporation" or a subsidiary or affiliate of any of the foregoing
under the laws of the State of Pennsylvania or the State New York or (ii) being
a "holding company" or a "subsidiary company" or an "affiliate" of a "holding
company" under PUHCA (except to the extent that each Loan Party is a "subsidiary
company" of Edison International, which is a "holding company" that is exempt
from all regulation under PUHCA (except for Section 9(a)(2) thereof) pursuant to
Section 3(a) thereof), (b) the failure of EME Homer City to (i) be an "exempt
wholesale generator" under PUHCA, (ii) be a member of, or otherwise have the
right and authority to sell electric power and related products and services
into, the NY Pool and PJM or (iii) have the authority to sell wholesale electric
power at market- based rates (not subject to any price cap or other market power
mitigation measure).

          SECTION 8.2.12  Limitation on Electricity Market Risk Exposure.  The
                          ----------------------------------------------
Borrower shall not, and shall not permit any other Loan Party to, engage in
transactions for any speculative purpose, including speculative transactions
relating to (i) fuel procurement or sales, (ii) purchases, sales or exchanges
related to capacity and energy from the Generating Station or financial
instruments related thereto or (iii) purchases, sales or exchanges of energy or
emissions credits.

                                   ARTICLE IX
                               EVENTS OF DEFAULT

          SECTION 9.1  Listing of Events of Default.  Each of the following
                       ----------------------------
events or occurrences described in this Section 9.1 shall constitute an "Event
                                        -----------                      -----
of Default".
- ----------

          SECTION 9.1.1  Non-Payment of Obligations.  The Borrower shall default
                         --------------------------
in (i)  the payment or mandatory prepayment when due of any principal of any
Loan or (ii) the payment

                                      -58-
<PAGE>
 
of interest on any Loan or any facility fee or of any other Obligation, within
five Business Days after any such interest or other amount becomes due in
accordance with the terms thereof or hereof.

          SECTION 9.1.2  Breach of Warranty.  (a) Any representation or warranty
                         ------------------
of any Loan Party made or deemed to be restated or remade in any Loan Document
or any other writing or certificate furnished by or on behalf of such Loan Party
to the Administrative Agent or any Lender for the purposes of or in connection
with any such Loan Document (including any certificates delivered pursuant to
Article VI) is or shall be incorrect when made or deemed made in any material
- ----------
respect or (b) any representation or warranty of Edison Mission Energy made in
the EME Credit Support Guarantee is or shall be incorrect when made in any
material respect.

          SECTION 9.1.3  Non-Performance of Certain Covenants and Obligations.
                         ----------------------------------------------------  
The Borrower shall default in the due performance and observance of any of its
obligations under Section 8.1.1(f) or 8.2.
                  ----------------    ---

          SECTION 9.1.4  Non-Performance of Other Covenants and Obligations.
                         --------------------------------------------------
Any Loan Party shall default in the due performance and observance of any other
covenant or agreement contained in any Loan Document, and such default shall
continue unremedied for a period of 30 days after written notice thereof shall
have been given to such Loan Party by the Administrative Agent.

          SECTION 9.1.5  Default on Other Indebtedness.  A default shall occur
                         ----------------------------- 
in the payment when due (subject to any applicable grace period), whether by
acceleration or otherwise, of any Indebtedness (other than Indebtedness
                                                ---------- 
described in Section 9.1.1) of any Loan Party having a principal amount,
             -------------
individually or in the aggregate, at least $15,000,000, or a default shall occur
in the performance or observance of any obligation or condition with respect to
such Indebtedness if the effect of such default is to accelerate the maturity of
any such Indebtedness or such default shall continue unremedied for any
applicable period of time sufficient to permit the holder or holders of such
Indebtedness, or any trustee or agent for such holders, to cause such
Indebtedness to become due and payable prior to its expressed maturity.

          SECTION 9.1.6  Bankruptcy, Insolvency.  Any Loan Party shall:
                         ----------------------

          (a) become insolvent or generally fail to pay, or admit in writing its
     inability or unwillingness to pay, debts as they become due;

          (b) apply for, consent to, or acquiesce in, the appointment of a
     trustee, receiver, sequestration or other custodian for any Loan Party or a
     substantial portion of a Loan Party's property, or make a general
     assignment for the benefit of creditors;

          (c) in the absence of such application, consent or acquiescence,
     permit or suffer to exist the appointment of a trustee, receiver,
     sequestration or  other custodian for a

                                      -59-
<PAGE>
 
     Loan Party or for a substantial part of its property, and such trustee,
     receiver, sequestration or other custodian shall not be discharged within
     60 days, provided that nothing in the Loan Documents shall prohibit or
              --------
     restrict any right the Administrative Agent, the Collateral Agent or any
     Lender may have under applicable law to appear in any court conducting any
     relevant proceeding during such 60-day period to preserve, protect and
     defend its rights under the Loan Documents (and the Loan Party shall not
     object to any such appearance);

          (d) permit or suffer to exist the commencement of any bankruptcy,
     reorganization, debt arrangement or other case or proceeding under any
     bankruptcy or insolvency law, or any dissolution, winding up or liquidation
     proceeding, in respect of a Loan Party, and, if any such case or proceeding
     is not commenced by the Loan Party such case or proceeding shall be
     consented to or acquiesced in by the Loan Party or shall result in the
     entry of an order for relief or shall remain for 60 days undismissed,
     provided that nothing in the Loan Documents shall prohibit or restrict any
     -------- 
     right the Administrative Agent, Collateral Agent or any Lender may have
     under applicable law to appear in any court conducting any such case or
     proceeding during such 60-day period to preserve, protect and defend its
     rights under the Loan Documents (and the Borrower shall not object to any
     such appearance); or 

          (e)take any corporate action authorizing, or in furtherance of, any of
     the foregoing.

          SECTION 9.1.7  Pension Plans.  Any of the following events shall occur
                         -------------
with respect to any Pension Plan:

          (a)the institution of any steps by the Borrower, any member of the
     Controlled Group or any other Person to terminate a Pension Plan or the
     occurrence of any other event or condition with respect to any Pension
     Plan, Welfare Plan or Multiemployer Plan if, as a result of such
     termination or such other event or condition, together with all other such
     terminations, events or conditions, if any, any Loan Party or any
     Controlled Group member could reasonably expect to incur, individually or
     in the aggregate, a liability or obligation in excess of $15,000,000; or

          (b)a contribution failure occurs with respect to any Pension Plan
     sufficient to give rise to a Lien under Section 302(f) of ERISA or Section
     412 of the Code.

          SECTION 9.1.8  Judgments.  Any judgment or order for the payment of
                         ---------
money in excess of $15,000,000 (taking into account any Insurance proceeds
payable under a policy where the insurer has accepted coverage without
reservation) shall be rendered against any Loan Party and such judgments or
decrees shall not have been vacated, discharged, stayed or bonded pending appeal
within 60 days from the entry thereof.

                                      -60-
<PAGE>
 
          SECTION 9.1.9  Control of the Borrower; Ownership of EME Homer City.
                         ----------------------------------------------------
Any Change in Control shall occur or the Borrower shall cease to own, directly
or indirectly, 100% of the general and limited partnership interests of EME
Homer City.

          SECTION 9.1.10  Edison Mission Energy.  Until the termination of the
                          ---------------------
EME Credit Support Guarantee or while any guarantee by Edison Mission Energy is
in effect pursuant to Section 5.2:
                      -----------

          (a)  Edison Mission Energy shall:

               (i)  become insolvent or generally fail to pay, or admit in
          writing its inability or unwillingness to pay, debts as they become
          due;

               (ii)  apply for, consent to, or acquiesce in, the appointment of
          a trustee, receiver, sequestrator or other custodian for Edison
          Mission Energy or a substantial portion of its property, or make a
          general assignment for the benefit of creditors;

               (iii)  in the absence of such application, consent or
          acquiescence, permit or suffer to exist the appointment of a trustee,
          receiver, sequestration or other custodian for Edison Mission Energy
          or for a substantial part of its property, and such trustee, receiver,
          sequestration or other custodian shall not be discharged within 60
          days, provided that nothing in the Loan Documents shall prohibit or
                --------
          restrict any right the Administrative Agent or any Lender may have
          under applicable law to appear in any court conducting any relevant
          proceeding during such 60-day period to preserve, protect and defend
          its rights under the Loan Documents (and Edison Mission Energy shall
          not object to any such appearance);

               (iv)  permit or suffer to exist the commencement of any
          bankruptcy, reorganization, debt arrangement or other case or
          proceeding under any bankruptcy or insolvency law, or any dissolution,
          winding up or liquidation proceeding, in respect of Edison Mission
          Energy, and, if any such case or proceeding is not commenced by Edison
          Mission Energy, such case or proceeding shall be consented to or
          acquiesced in by it or shall result in the entry of an order for
          relief or shall remain for 60 days undismissed, provided that nothing
                                                          --------
          in the Loan Documents shall prohibit or restrict any right the
          Administrative Agent or any Lender may have under applicable law to
          appear in any court conducting any such case or proceeding during such
          60-day period to preserve, protect and defend its rights under the
          Loan Documents (and Edison Mission Energy shall not object to any such
          appearance); or

               (v)  take any corporate action authorizing, or in furtherance of,
     any of the foregoing; or

                                      -61-
<PAGE>
 
          (b) a default shall occur in the payment when due (subject to any
     applicable grace period), whether by acceleration or otherwise, of any
     Indebtedness of Edison Mission Energy having a principal amount,
     individually or in the aggregate, in excess of $20,000,000, or a default
     shall occur in the performance or observance of any obligation or condition
     with respect to such Indebtedness if the effect of such default is to
     accelerate the maturity of any such Indebtedness or such default shall
     continue unremedied for any applicable period of time sufficient to permit
     the holder or holders of such Indebtedness, or any trustee or agent for
     such holders, to cause such Indebtedness to become due and payable prior to
     its expressed maturity.

          SECTION 9.2  Action if Bankruptcy.  If any Event of Default described
                       --------------------
in clauses (a) through (e) of Section 9.1.6 shall occur with respect to the
   ----------          ---    ------------- 
Borrower, the Commitments (if not theretofore terminated) shall automatically
terminate and the outstanding principal amount of all outstanding Loans and all
other Obligations shall automatically be and become immediately due and payable,
without notice or demand.

          SECTION 9.3  Action if Other Event of Default.  If any Event of
                       --------------------------------
Default (other than any Event of Default described in clauses (a) through (e) of
                                                      -----------         ---
Section 9.1.6) shall occur for any reason, whether voluntary or involuntary, and
- --------------
be continuing, the Administrative Agent, upon the direction of the Required
Lenders, shall by written notice to the Borrower declare all or any portion of
the outstanding principal amount of the Loans and other Obligations to be due
and payable and/or the Commitments (if not theretofore terminated) to be
terminated, whereupon the full unpaid amount of such Loans and other Obligations
which shall be so declared due and payable shall be and become immediately due
and payable, without further notice, demand or presentment, and/or, as the case
may be, the Commitments shall terminate.  The rights provided for in the Loan
Documents are cumulative and are not exclusive of any other rights, powers,
privileges or remedies provided by law or in equity, or under any other
instrument, document or agreement now existing or hereafter arising.

          SECTION 9.4  Rescission of Declaration.  Any declaration made pursuant
                       -------------------------
to Section 9.3 may, should the Required Lenders in their sole and absolute
   -----------
discretion so elect, be rescinded by written notice to the Borrower at any time
after the principal of the Loans and the Notes shall have become due and
payable, but before any judgment or decree for the payment of the monies so due,
or any part thereof, shall have been entered; provided that the Borrower shall
                                              --------
have paid all arrears of interest upon the Loans and all other amounts then owed
to the Administrative Agent and the Lenders including all costs, expenses and
liabilities incurred by the Administrative Agent and the Lenders in respect of
such declaration and all consequences thereof (except that principal of the
Loans which by such declaration shall have become payable) and every other Event
of Default shall have been made good, waived or cured; provided that no such
                                                       --------
rescission or annulment shall extend to or affect any subsequent Event of
Default or impair any right consequent thereon.

                                      -62-
<PAGE>
 
                                   ARTICLE X
                                   THE AGENT

          SECTION 10.1  Actions.  (a)  Each Lender hereby appoints CUSA as its
                        -------
Administrative Agent under and for purposes of each Loan Document.  Each Lender
authorizes the Administrative Agent to act on behalf of such Lender under each
Loan Document and, in the absence of other written instructions from the
Required Lenders received from time to time by the Administrative Agent (with
respect to which the Administrative Agent agrees that it will comply, except as
otherwise provided in this Section or as otherwise advised by counsel), to
exercise such powers hereunder and thereunder as are specifically delegated to
or required of the Administrative Agent by the terms hereof and thereof,
together with such powers as may be reasonably incidental thereto.  Without
limiting the generality of the foregoing, each Lender hereby authorizes the
Administrative Agent to designate and appoint United States Trust Company of New
York as Collateral Agent for the Lenders and the other Secured Parties under the
Security Documents and to designate and appoint any successor thereto.
Notwithstanding any provision to the contrary contained elsewhere in any Loan
Document, the Administrative Agent shall not have any duties or
responsibilities, except those expressly set forth herein, nor shall the
Administrative Agent have or be deemed to have any fiduciary relationship with
any Lender, and no implied covenants, functions, responsibilities, duties,
obligations or liabilities shall be read into any Loan Document or otherwise
exist against the Administrative Agent.  Without limiting the generality of the
foregoing sentence, the use of the term "agent" in this Agreement with reference
to the Administrative Agent is not intended to connote any fiduciary or other
implied (or express) obligations arising under agency doctrine of any applicable
law.  Instead, such term is used merely as a matter of market custom, and is
intended to create or reflect only an administrative relationship between
independent contracting parties.

          (b) Each Lender hereby agrees to indemnify (which indemnity shall
survive any termination of this Agreement) the Agent-Related Persons and the
Collateral Agent pro rata according to such Lender's Commitment's percentage of
                 --------
the Total Commitment Amount, from and against any and all liabilities,
obligations, losses, damages, claims, costs or expenses of any kind or nature
whatsoever which may at any time be imposed on, incurred by, or asserted
against, the Agent-Related Persons or the Collateral Agent in any way relating
to or arising out of any Loan Document, including reasonable attorneys' fees,
and as to which the Administrative Agent or the Collateral Agent, as the case
may be, is not reimbursed by the Borrower; provided, however, that no Lender
                                           --------  -------
shall be liable for the payment of any portion of such liabilities, obligations,
losses, damages, claims, costs or expenses which are determined by a court of
competent jurisdiction in a final proceeding to have resulted from the Agent-
Related Person's or Collateral Agent's, as the case may be, gross negligence or
willful misconduct.  Neither any Agent-Related Person nor the Collateral Agent
shall be required to take any action under any Loan Document, or to prosecute or
defend any suit in respect of any Loan Document, unless it is indemnified
hereunder to its satisfaction.  If any indemnity in favor of the Administrative
Agent or the Collateral Agent shall be or become, in its determination,
inadequate, the Agent-Related

                                      -63-
<PAGE>
 
Person or the Collateral Agent, as the case may be, may call for additional
indemnification from the Lenders and cease to do the acts indemnified against
hereunder until such additional indemnity is given.

          SECTION 10.2  Funding Reliance.  Unless the Administrative Agent shall
                        ----------------
have been notified by telephone, confirmed in writing, by any Lender, (i) with
respect to LIBO Rate Loans, by 12:00 Noon, New York City time, on the Business
Day prior to a Borrowing  or (ii) with respect to Base Rate Loans, by 2:00 p.m.,
New York City time, on the same day of a Borrowing, or that such Lender will not
make available the amount which would constitute its Percentage of such
Borrowing on the date specified therefor, the Administrative Agent may assume
that such Lender has made such amount available to the Administrative Agent and,
in reliance upon such assumption, may,  but shall not be required to, make
available to the Borrower a corresponding amount.  If and to the extent that
such Lender shall not have made such amount available to the Administrative
Agent, such Lender and the Borrower severally agree to repay the Administrative
Agent forthwith on demand such corresponding amount together with interest
thereon, for each day from the date the Administrative Agent made such amount
available to the Borrower to the date such amount is repaid to the
Administrative Agent, at the interest rate applicable at the time to Loans
comprising such Borrowing; provided, that if such Lender makes available the
                           --------
amount which is its Percentage of such Borrowing on or before the next Business
Day following the day when due, the interest rate payable on such amount shall
be the Federal Funds Rate.

          SECTION 10.3  Exculpation.  No Agent-Related Person shall be liable to
                        -----------
any Lender for any action taken or omitted to be taken by it under any Loan
Document, or in connection therewith, except for its own willful misconduct or
gross negligence, nor responsible for any recitals or warranties herein or
therein, nor for the effectiveness, enforceability, validity or due execution of
any Loan Document, nor to make any inquiry respecting the performance by the
Borrower of its obligations under any Loan Document.  Any such inquiry which may
be made by the Administrative Agent shall not obligate it to make any further
inquiry or to take any action.  Each Agent-Related Person shall be entitled to
rely upon advice of counsel concerning legal matters and upon any notice,
consent, certificate, statement or writing which the Administrative Agent
believes to be genuine and to have been presented by a proper Person.

          SECTION 10.4  Successor.  The Administrative Agent may resign as such
                        ---------
at any time upon at least 30 days' prior notice to the Borrower and all Lenders.
If the Administrative Agent at any time shall resign, the Required Lenders may,
within ten days after such notice and with the consent of the Borrower (not to
be unreasonably withheld), appoint another Lender as a successor Administrative
Agent which shall thereupon become the Administrative Agent hereunder.  If no
successor Administrative Agent shall have been so appointed by the Required
Lenders, and shall have accepted such appointment, within 30 days after the
retiring Administrative Agent's giving notice of resignation, then the retiring
Administrative Agent may, on behalf of the Lenders, after notice to and
consultation with the Borrower, appoint a successor Administrative Agent, which
shall be one of the Lenders or an Eligible Assignee, and shall have a

                                      -64-
<PAGE>
 
combined capital and surplus of at least $250,000,000.  Upon the acceptance of
any appointment as Administrative Agent hereunder by a successor Administrative
Agent, such successor Administrative Agent shall be entitled to receive from the
retiring Administrative Agent such documents of transfer and assignment as such
successor Administrative Agent may reasonably request, and shall thereupon
succeed to and become vested with all rights, powers, privileges and duties of
the retiring Administrative Agent, and the retiring Administrative Agent shall
be discharged from its duties and obligations under this Agreement.  After the
effective date of any retiring Administrative Agent's resignation hereunder as
the Administrative Agent, the provisions of (a) this Article X shall inure to
                                                     ---------
its benefit as to any actions taken or omitted to be taken by it while it was
the Administrative Agent under this Agreement; and (b) Section 11.3 and Section
                                                       ------------     --------
11.4 shall continue to inure to its benefit.
- ----            

          SECTION 10.5  Loans by CUSA.  CUSA shall have the same rights and
                        -------------
powers with respect to the Loans made by it or any of its Affiliates as any
other Lender and may exercise the same as if it were not the Administrative
Agent.  CUSA and its Affiliates may accept deposits from, lend money to, and
generally engage in any kind of business with the Borrower or any Subsidiary or
Affiliate of the Borrower as if CUSA were not the Administrative Agent
hereunder.

          SECTION 10.6  Reliance by Administrative Agent. (a)  The
                        --------------------------------
Administrative Agent shall be entitled to rely, and shall be fully protected in
relying, upon any writing, resolution, notice, consent, certificate, affidavit,
letter, telegram, facsimile, telex or telephone message, statement or other
document or conversation believed by it to be genuine and correct and to have
been signed, sent or made by the proper Person or Persons, and upon advice and
statements of legal counsel (including counsel to the Company), independent
accountants and other experts selected by the Administrative Agent.  The
Administrative Agent shall be fully justified in failing or refusing to take any
action under any Loan Document unless it shall first receive such advice or
concurrence of the Required Lenders as it deems appropriate and, if it so
requests, it shall first be indemnified to its satisfaction by the Lenders
against any and all liability and expense which may be incurred by it by reason
of taking or continuing to take any such action.  The Administrative Agent shall
in all cases be fully protected in acting, or in refraining from acting, under
any Loan Document in accordance with a request or consent of the Required
Lenders and such request and any action taken or failure to act pursuant thereto
shall be binding upon all of the Lenders.

          (b) For purposes of determining compliance with the conditions
specified in Section 6.1, each Lender that has executed this Agreement shall be
             -----------  
deemed to have consented to, approved or accepted or to be satisfied with, each
document or other matter either sent by the Administrative Agent to such Lender
for consent, approval, acceptance or satisfaction, or required thereunder to be
consented to or approved by or acceptable or satisfactory to the Lender.

          SECTION 10.7  Notice of Default.  The Administrative Agent shall not
                        -----------------
be deemed to have knowledge or notice of the occurrence of any Default or Event
of Default, except with respect to defaults in the payment of principal,
interest and fees required to be paid to the

                                      -65-
<PAGE>
 
Administrative Agent for the account of the Lenders, unless the Administrative
Agent shall have received written notice from a Lender or the Borrower referring
to this Agreement, describing such Default or Event of Default and stating that
such notice is a "notice of default".  The Administrative Agent will notify the
Lenders of its receipt of any such notice.  The Administrative Agent shall take
such action with respect to such Default or Event of Default as may be requested
by the Required Lenders in accordance with Article IX; provided, however, that
                                           ----------  --------  -------
unless and until the Administrative Agent has received any such request, the
Administrative Agent may (but shall not be obligated to) take such action, or
refrain from taking such action, with respect to such Default or Event of
Default as it shall deem advisable or in the best interest of the Lenders.

          SECTION 10.8  Credit Decisions.  Each Lender acknowledges that it has,
                        ----------------
independently of the Agent-Related Person and each other Lender, and based on
such Lender's review of the financial information of the Borrower, the Loan
Documents (the terms and provisions of which being satisfactory to such Lender)
and such other documents, information and investigations as such Lender has
deemed appropriate, made its own credit decision to extend its Commitments.
Each Lender also acknowledges that it will, independently of the Administrative
Agent and each other Lender, and based on such other documents, information and
investigations as it shall deem appropriate at any time, continue to make its
own credit decisions as to exercising or not exercising from time to time any
rights and privileges available to it under any Loan Document.

          SECTION 10.9  Copies.  The Administrative Agent shall give prompt
                        ------
notice to each Lender of each notice or request required or permitted to be
given to the Administrative Agent by the Borrower pursuant to the terms of this
Agreement (unless concurrently delivered to the Lenders by the Borrower).  The
Administrative Agent will distribute to each Lender each document or instrument
received for its account and copies of all other communications received by the
Administrative Agent from the Borrower for distribution to the Lenders by the
Administrative Agent in accordance with the terms of this Agreement.

          SECTION 10.10  Interest of Lenders in Collateral.  Each Lender hereby
                         ---------------------------------
acknowledges and consents that such Lender's right or interest in the Collateral
(or any portion thereof) shall be subject to the terms of the Collateral Agency
and Intercreditor Agreement and the other Security Documents, including the
requisite level of consent by holders of Senior Debt to enforce upon the
Collateral.

                                   ARTICLE XI
                            MISCELLANEOUS PROVISIONS

          SECTION 11.1  Waivers, Amendments.  (a)  The provisions of each
                        ------------------- 
Security Document may from time to time be amended, modified or waived as
necessary or advisable in connection with any incurrence of Senior Debt if such
amendment, modification or waiver is in writing and consented to by each Loan
Party party thereto and the Administrative Agent; provided, however, that no
such amendment, modification or waiver shall release all or any

                                      -66-
<PAGE>
 
material portion of the Collateral from the Liens of the Security Documents or
release any Loan Party from its obligations under the Guarantee and Collateral
Agreement or release Edison Mission Energy from its obligations under the EME
Credit Support Guarantee or amend, modify or waive any provision of the Security
Deposit Agreement or the Collateral Agency and Intercreditor Agreement relating
to the order of priority or amounts of transfers of cash and other property to
be made thereunder or, except as contemplated by Section 8.6 of the Collateral
Agency and Intercreditor Agreement, amend or modify the definition of "Required
Secured Parties" thereunder or the percentages required for any action to be
taken thereunder, in each case without the written consent of all of the
Lenders. The provisions of each other Loan Document may from time to time be
amended, modified or waived, if such amendment, modification or waiver is in
writing and consented to by each Loan Party party thereto and the Required
Lenders; provided, however, that no such amendment, modification or waiver
         --------  -------
shall:  (A)  forgive the principal amount or extend the final scheduled date of
maturity of any Loan, reduce the stated rate of any interest or fee payable
hereunder or extend the scheduled date of any payment thereof, or increase the
amount or extend the expiration date of any Lender's Revolving Loan Commitment
or Term Loan Commitment, in each case without the consent of each Lender
directly affected thereby; (B)  amend, modify or waive any provision of this
Section 11.1 or amend or modify the definition of Required Lenders or consent to
- ------------
the assignment or transfer by any Loan Party of any of its rights and
obligations under the Loan Documents without the written consent of the Lenders;
(C)  amend, modify or waive any provision of Section 4.9, or any provision in
                                             ----------- 
such Loan Documents which provides for amounts paid in respect of the
Obligations to be shared among the Lenders ratably, without the consent of all
of the Lenders.  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 Administrative Agent and all future
holders of the Loans and Commitments.  In the case of any waiver, the Loan
Parties, the Lenders and the Administrative Agent shall be restored to their
former position and rights under the 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.

          (b) No failure or delay on the part of the Administrative Agent or any
Lender in exercising any power or right under any Loan Document shall operate as
a waiver thereof, nor shall any single or partial exercise of any such power or
right preclude any other or further exercise thereof or the exercise of any
other power or right.  No notice to or demand on the Borrower in any case shall
entitle it to any notice or demand in similar or other circumstances.  No waiver
or approval by the Administrative Agent or any Lender under any Loan Document
shall, except as may be otherwise stated in such waiver or approval, be
applicable to subsequent transactions.  No waiver or approval hereunder shall
require any similar or dissimilar waiver or approval thereafter to be granted
hereunder.

          SECTION 11.2  Notices.  All notices and other communications provided
                        -------
to any party hereto under any Loan Document shall be in writing or by facsimile
and addressed, delivered or transmitted to such party at its address or
facsimile number set forth on Schedule 1.1(b) or set
                              ---------------


                                      -67-
<PAGE>
 
forth in the Lender Assignment Agreement or at such other address or facsimile
number as may be designated by such party in a written notice to the other
parties.  Any notice, if mailed and properly addressed with postage prepaid
shall be effective five Business Days after being sent or if properly addressed
and sent by pre-paid courier service, shall be deemed given when received; any
notice, if transmitted by facsimile, shall be deemed given when transmitted (if
confirmed).

          SECTION 11.3  Payment of Costs and Expenses.  (a)  The Borrower agrees
                        -----------------------------
to pay promptly on demand all reasonable out-of-pocket costs and expenses of the
Lead Arrangers and the Administrative Agent (including the reasonable fees and
out-of-pocket costs and expense of counsel to the Administrative Agent) in
connection with:

               (i) the negotiation, preparation, execution and delivery of each
          Loan Document, including schedules and exhibits, and any amendments,
          waivers, consents, supplements or other modifications to any Loan
          Document as may from time to time hereafter be required; and

               (ii) the preparation and review of the form of any document or
          instrument relevant to any Loan Document; provided, however, that the
                                                    --------  -------
          Borrower shall have no obligation to pay for the cost of the
          documentation of assignments or participations as provided in Section
                                                                        -------
          11.11 (unless such assignment is made pursuant to Section 4.11);
          -----                                             ------------

in each case, upon presentation of a statement of account, whether or not the
transactions contemplated hereby are consummated.

          (b) The Borrower further agrees to pay upon demand, and to save the
Administrative Agent and the Lenders harmless from all liability for, any stamp
or other taxes which may be payable in connection with the execution, delivery
or enforcement of any Loan Documents or with the Borrowings hereunder.  The
Borrower also agrees to reimburse the Administrative Agent and each Lender, as
applicable, promptly upon demand for (x) all reasonable out-of-pocket costs and
expenses (including fees and out-of-pocket costs and expenses of counsel)
incurred by the Administrative Agent and each Lender in connection with the
negotiation of any restructuring or work-out, whether or not consummated, of any
Obligations and (y) all out-of-pocket costs and expenses (including fees and
out-of-pocket costs and expenses of counsel) incurred by the Administrative
Agent and each Lender in connection with the enforcement of any Obligations
after an Event of Default; provided that, in either case, the Borrower shall not
                           --------
be obligated to reimburse such costs and expenses that are found in a final
judgment by a court of competent jurisdiction to have been incurred in an
attempt to enforce such rights and remedies that were pursued by such
Administrative Agent or Lender in bad faith and without any reasonable basis in
fact or law.

          SECTION 11.4  Indemnification.  (a) In consideration of the execution
                        ---------------
and delivery of this Agreement by each Lender and the extension of the
Commitments, the Borrower

                                      -68-
<PAGE>
 
hereby indemnifies, exonerates and holds the Administrative Agent, the Lead
Arrangers and each Lender and each of their respective affiliates, officers,
directors and employees  (collectively, the "Indemnified Parties") free and
                                             -------------------   
harmless from and against any and all losses, costs, actions, causes of action,
suits, liabilities, damages and out-of-pocket costs and expenses incurred in
connection therewith (irrespective of whether any such Indemnified Party is a
party to the action for which indemnification hereunder is sought), including
any amounts paid to any Agent-Related Person pursuant to Section 10.1(b) and
                                                         ---------------
reasonable attorneys' fees and disbursements but excluding claims for lost
profits (collectively, the "Indemnified Liabilities"), joint or several, that
                            ----------------------- 
may be incurred by or asserted or awarded against any Indemnified Party, in each
case arising out of or in connection with or relating to:

               (i) any transaction financed or to be financed in whole or in
          part, directly or indirectly, with the proceeds of any Loan;

               (ii) the entering into and performance of this Agreement and any
          other Loan Document by any of the Indemnified Parties (including any
          action brought by or on behalf of the Borrower as the result of any
          determination by the Required Lenders pursuant to Article VI not to
                                                            ----------  
          fund any Borrowing);

               (iii)any investigation, litigation, proceeding, or obligation
          related to any Environmental Law or other matter in any case arising
          out of the relationship of the parties under this Agreement; or

               (iv)the presence on or under, or the escape, seepage, leakage,
          spillage, discharge, emission or release from, any real property
          owned, leased or operated by any Loan Party thereof of any Hazardous
          Material (including any losses, liabilities, damages, injuries, costs,
          expenses or claims asserted or arising under any Environmental Law),
          or at any other locations regardless of whether caused by, or within
          the control of, such Loan Party, where such claim or liability arises
          out of the relationship of the parties under this Agreement;

whether or not such investigation, litigation or proceeding is brought by the
Borrower or its Affiliates, any of their respective shareholders or creditors,
an Indemnified Party or any other person, or an Indemnified Party is otherwise a
party thereto and whether or not the transactions contemplated hereby are
consummated, except for (A) any such Indemnified Liabilities arising for the
account of a particular Indemnified Party by reason of the relevant Indemnified
Party's (i) gross negligence or willful misconduct or (ii) breach of such
Indemnified Party's obligations under this Agreement; (B) any such Indemnified
Liabilities that result solely from action or the failure to act by any
Indemnified Party more than 90 days after Lenders acquire title to the
Generating Station through foreclosure or otherwise which action or failure to
act violates applicable Environmental Law; and (C) the increase in any
Indemnified Liabilities if, and only to the extent that, such increase results
from action or the failure to act by any Indemnified Party more than 90 days
after Lenders acquire title to the Generating Station through foreclosure or

                                      -69-
<PAGE>
 
otherwise, which action or failure to act violates applicable Environmental Law
and thereby causes an increase in any Indemnified Liabilities.  If and to the
extent that the foregoing undertaking may be unenforceable for any reason, the
Borrower hereby agrees to make the maximum contribution to the payment and
satisfaction of each of the Indemnified Liabilities which is permissible under
applicable law.

          (b) To the extent permitted by applicable law, no Indemnified Party
shall have any liability to the Borrower or its Affiliates or any of their
respective shareholders or creditors under 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
or any agreement or instrument contemplated hereby, any Loan or the use of the
proceeds thereof.

          SECTION 11.5  Survival.  The obligations of the Borrower under
                        --------
Sections 4.3, 4.4, 4.5, 4.6, 4.7, 11.3 and 11.4, and the obligations of the
- ------------  ---  ---  ---  ---  ----     ----
Lenders under Section 10.1, shall in each case survive any termination of this
              ------------
Agreement, the payment in full of all Obligations and the termination of all
Term Loan Commitments and Revolving Loan Commitments.  The representations and
warranties made by the Borrower in each Loan Document shall survive the
execution and delivery of such Loan Document.

          SECTION 11.6  Severability.  Any provision of any Loan Document which
                        ------------
is prohibited or unenforceable in any jurisdiction shall, as to such provision
and such jurisdiction, be ineffective to the extent of such prohibition or
unenforceability without invalidating the remaining provisions of such Loan
Document or affecting the validity or enforceability of such provision in any
other jurisdiction.

          SECTION 11.7  Headings.  The various headings of each Loan Document
                        --------
are inserted for convenience only and shall not affect the meaning or
interpretation of such Loan Document or any provisions thereof.

          SECTION 11.8  Execution in Counterparts.  This Agreement may be
                        -------------------------
executed by the parties hereto in several counterparts, each of which shall be
executed by the Borrower and the Administrative Agent and be deemed to be an
original and all of which shall constitute together but one and the same
agreement.

          SECTION 11.9  Governing Law; Entire Agreement.  This Agreement, the
                        -------------------------------
Notes 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 New York.  The Loan Documents, together with the fee letter referred to
in Section 3.3.2 and the commitment letter of even date therewith, represent the
   -------------
agreement of the Borrower, the Administrative Agent and  the Lenders and
supersede any and all prior agreements and understandings, oral or written,
relative or with respect to the subject matter hereof, and there are no
promises, undertakings, representations or warranties by the Administrative
Agent or any Lender relative to subject matter hereof not expressly set forth or
referred to herein or in the other Loan Documents.

                                     -70-
<PAGE>
 
          SECTION 11.10  Successors and Assigns.  This Agreement shall be
                         ----------------------
binding upon and shall inure to the benefit of the parties hereto and their
respective successors and assigns; provided, however, that:
                                   --------  ------- 

          (a) the Borrower may not assign or transfer its rights or obligations
      hereunder without the prior written consent of the Administrative Agent
      and all Lenders; and

          (b) the rights of sale, assignment and transfer of the Lenders are
      subject to Section 11.11.
                 -------------  

          SECTION 11.11  Sale and Transfer of Loans and Notes; Participations in
                         -------------------------------------------------------
Loans and Notes.  Each Lender may assign, or sell participations in, its Loans
- ---------------
and Term Loan Commitments or Revolving Loan Commitments to one or more other
Persons in accordance with this Section 11.11.
                                -------------

          SECTION 11.11.1  Assignments.  (a)  Any Lender (an "Assignor") may, in
                           -----------                        --------
accordance with applicable law, at any time and from time to time assign to any
Eligible Assignee, with the consent of the Administrative Agent and, except at
any time a Default or Event of Default shall have occurred and be continuing,
the Borrower (which, in each case, shall not be unreasonably withheld or
delayed), all or any part of its rights and obligations under this Agreement
pursuant to a Lender Assignment Agreement, executed by such Eligible Assignee,
such Assignor and any other Person whose consent is required pursuant to this
paragraph, and delivered to the Administrative Agent for its acceptance and
recording in the Register; provided that no such assignment to an Eligible
                           -------- 
Assignee (other than any Lender or any affiliate thereof) shall be in an
aggregate principal amount of less than $10,000,000 (other than in the case of
an assignment of all of a Lender's interests under this Agreement), unless
otherwise agreed by the Borrower and the Administrative Agent and; provided,
                                                                   --------
further, that after giving effect to any such assignment the assigning Lender
- -------
shall have Commitments remaining of at least $10,000,000 in the aggregate amount
(other than in the case of an assignment of all of a Lender's interests under
this Agreement).  Any such assignment need not be ratable as among the 364-Day
Term Loans, the Construction Term Loans and the Revolving Loans.  Upon such
execution, delivery, acceptance and recording, from and after the effective date
determined pursuant to such Lender Assignment Agreement, (x) the Eligible
Assignee thereunder shall be a party hereto and, to the extent provided in such
Lender Assignment Agreement, have the rights and obligations of a Lender
hereunder with a Term Loan Commitment or Revolving Loan Commitment, as the case
may be, and/or Loans as set forth therein, and (y) the Assignor thereunder
shall, to the extent provided in such Lender Assignment Agreement, be released
from its obligations under this Agreement (and, in the case of a Lender
Assignment Agreement covering all of an Assignor's rights and obligations under
this Agreement, such Assignor shall cease to be a party hereto).
Notwithstanding any provision of this Section 11.11.1 the consent of the
                                      ---------------
Borrower shall not be required for any assignment that occurs when a Default or
an Event of Default pursuant to Section 9.1.6 shall have occurred and be
                                -------------       
continuing with respect to the Borrower.

                                      -71-
<PAGE>
 
          (b) The Administrative Agent shall, on behalf of the Borrower,
maintain at its address referred to on Schedule 1.1(b) a copy of each Lender
                                       ---------------
Assignment Agreement delivered to it and a register (the "Register") for the
                                                          --------
recordation of the names and addresses of the Lenders and the 364-Day Term Loan
Commitment, Construction Term Loan Commitment or Revolving Loan Commitment of,
and the principal amount of the Loans owing to, each Lender from time to time.
The entries in the Register shall be conclusive, in the absence of manifest
error, and the Borrower, each other Loan Party, the Administrative Agent and the
Lenders shall treat each Person whose name is recorded in the Register as the
owner of the Loans and any Notes evidencing the Loans recorded therein for all
purposes of this Agreement. Any assignment of any Loan, whether or not evidenced
by a Note, shall be effective only upon appropriate entries with respect thereto
being made in the Register (and each Note shall expressly so provide). Any
assignment or transfer of all or part of a Loan evidenced by a Note shall be
registered on the Register only upon surrender for registration of assignment or
transfer of the Note evidencing such Loan, accompanied by a duly executed Lender
Assignment Agreement, and thereupon one or more new Notes shall be issued to the
designated Eligible Assignee.

          (c)  Upon its receipt of a Lender Assignment Agreement executed by an
Assignor, an Eligible Assignee and any other Person whose consent is required by
Section 11.11.1(a), together with payment to the Administrative Agent of a
- ------------------
registration and processing fee of $3,000, the Administrative Agent shall (i)
promptly accept such Lender Assignment Agreement and (ii) record the information
contained therein in the Register on the effective date determined pursuant
thereto.

          (d)  For avoidance of doubt, the parties to this Agreement acknowledge
that the provisions of this Section 11.11.1 concerning assignments of Loans
                            ---------------  
relate only to absolute assignments and that such provisions do not prohibit
assignments creating security interests, including any pledge or assignment by a
Lender of any Loan or Note to any Federal Reserve Bank in accordance with
applicable law.

          (e)  The Borrower, upon receipt of written notice from the relevant
Lender, agrees to issue Notes to any Lender requiring Notes to facilitate
transactions of the type described in paragraph (d) of this Section 11.11.1.
                                      -------------         ---------------

          SECTION 11.11.2  Participations.  Any Lender may at any time sell to
                           --------------
one or more commercial banks or other Persons (each of such commercial banks and
other Persons being herein called a "Participant") participating interests in
                                     -----------
any of the Loans, Commitments, or other interests of such Lender hereunder;
provided, however, that:
- --------  -------

          (a) no participation contemplated in this Section 11.11.2 shall
                                                    ---------------
     relieve such Lender from its Commitments or its other obligations under any
     Loan Document;

          (b) such Lender shall remain solely responsible for the performance of
     its Commitments and such other obligations;

                                      -72-
<PAGE>
 
          (c)  the Borrower and the Administrative Agent shall continue to deal
     solely and directly with such Lender in connection with such Lender's
     rights and obligations under each of the Loan Documents;

          (d)  no Participant, unless such Participant is an Affiliate of such
     Lender, or is itself a Lender, shall be entitled to require such Lender to
     take or refrain from taking any action hereunder or under any other Loan
     Document, except as provided in clause (f) of this Section 11.11.2;
                                     ----------         ----------------

          (e)  the Borrower shall not be required to pay any amount under
     Sections 4.3, 4.4, 4.5, 4.6, 4.7, 11.3 and 11.4, that is greater than the
     ------------  ---  ---  ---  ---  ----     ----  
     amount which it would have been required to pay had no participating
     interest been sold;

          (f)  in no event shall any Participant under any such participation
     have any right to approve any amendment or waiver of any provision of any
     Loan Document, or any consent to any departure by any Loan Party therefrom,
     except to the extent that such amendment, waiver or consent would reduce
     the principal of, or interest on, the Loans or any fees payable hereunder,
     extend the due date of such principal, interest or fee payments, or
     increase the amount or extend the Commitment Termination Date of such
     Loans, in each case to the extent subject to such participation;

          (g)  the Borrower agrees that if amounts outstanding under this
     Agreement and the Loans are due or unpaid, or shall have been declared or
     shall have become due and payable upon the occurrence of an Event of
     Default, each Participant shall, to the maximum extent permitted by
     applicable law, be deemed to have the right of setoff in respect of its
     participating interest in amounts owing under this Agreement to the same
     extent as if the amount of its participating interest were owing directly
     to it as a Lender under this Agreement, provided that, in purchasing such
                                             --------
     participating interest, such Participant shall be deemed to have agreed to
     share with the Lenders the proceeds thereof as provided in Section 4.10 as
                                                                ------------
     fully as if it were a Lender hereunder; and

          (h)  the Borrower also agrees that each Participant shall be entitled
     to the benefits of Sections 4.3, 4.4, 4.5, 4.6 and 4.7 with respect to its
                        ------------  ---  ---  ---     ---   
     participation in the Term Loan Commitments or the Revolving Loan
     Commitments, and the Loans outstanding from time to time as if it was a
     Lender; provided that, in the case of Section 4.7, such Participant shall
             --------                      -----------  
     have complied with the requirements of said Section and provided, further,
                                                             --------  -------
     that no Participant shall be entitled to receive any greater amount
     pursuant to any such Section than the transferor Lender would have been
     entitled to receive in respect of the amount of the participation
     transferred by such transferor Lender to such Participant had no such
     transfer occurred.

          SECTION 11.12  Other Transactions.  Nothing contained herein shall
                         ------------------ 
preclude the Administrative Agent or any other Lender from engaging in any
transaction, in addition to those

                                      -73-
<PAGE>
 
contemplated by any Loan Document, with the Borrower or any of its Affiliates in
which the Borrower or such Affiliate is not restricted hereby from engaging with
any other Person.

          SECTION 11.13  Submission To Jurisdiction; Waivers.  Each of the
                         -----------------------------------
Borrower, the Administrative Agent and the Lenders hereby irrevocably and
unconditionally:

          (a)  submits for itself and its property in any legal action or
     proceeding relating to the 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 New York, the
     courts of the United States for the Southern District of New York, and
     appellate courts from any thereof;

          (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 such
     Person at its address set forth on Schedule 1.1(b) or at such other address
                                        ---------------
     of which the Administrative Agent shall have been notified pursuant to
     Section 11.2;
     ------------

          (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.

          SECTION 11.14  WAIVERS OF JURY TRIAL.  THE BORROWER, THE
                         ---------------------
ADMINISTRATIVE AGENT 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.

          SECTION 11.15  Non-Recourse Persons. The Lenders acknowledge that no
                         --------------------
Non- Recourse Person shall have any responsibility or liability for the
Obligations.

          SECTION 11.16  Acknowledgments.  The Borrower hereby acknowledges
                         ---------------
that:

                                      -74-
<PAGE>
 
          (a)  it has been advised by counsel in the negotiation, execution and
     delivery of the Loan Documents;

          (b)  neither the Administrative Agent nor any Lender has any fiduciary
     relationship with or duty to the Borrower arising out of or in connection
     with the Loan Documents, and the relationship between Administrative Agent
     and Lenders, on one hand, and the Borrower, on the other hand, in
     connection herewith or therewith is solely that of debtor and creditor; and

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

          SECTION 11.17  Releases of Guarantees and Liens.  (a)  Notwithstanding
                         --------------------------------
anything to the contrary contained in any Loan Document, the Collateral Agent is
hereby irrevocably authorized by each Lender (without requirement of notice to
or consent of any Lender except as expressly required by Section 11.1) 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 11.1 or (ii) under the
                                     ------------   
circumstances described in paragraph (b) below.
                           ------------

          (b)  At such time as the Loans and the other obligations under the
Loan Documents shall have been paid in full and the Commitments have been
terminated, the Administrative Agent shall instruct the Collateral Agent (i) to
return to the Borrower any Collateral then held in fulfillment of the Debt
Service Reserve Requirement, (ii) to release the Lien on the capital stock of
the Borrower granted pursuant to Section 3(b) of the Guarantee and Collateral
Agreement and to return to the Borrower all stock certificates pledged in
connection therewith and (iii) to release Edison Mission Energy from its
obligations under the Guarantee and Collateral Agreement.

          SECTION 11.18  Confidentiality.  Each of the Administrative Agent and
                         ---------------
each Lender agrees to keep confidential all non-public information provided to
it by any Loan Party pursuant to this Agreement; provided that nothing herein
                                                 -------- 
shall prevent the Administrative Agent or any Lender from disclosing any such
information (a) to the Administrative Agent, any other Lender or any affiliate
of any Lender, (b) to any transferee or prospective transferee that agrees to
comply with the provisions of this Section 11.18, (c) to its employees,
                                   -------------
directors, agents, attorneys, accountants and other professional advisors or
those of any of its affiliates, (d) upon the request or demand of any
Governmental Authority, (e) in response to any order of any court or other
Governmental Authority or as may otherwise be required pursuant to any
Requirement of Law, (f) if requested or required to do so in connection with any
litigation or similar proceeding, (g) that has been publicly disclosed, (h) to
the National Association of Insurance Commissioners or any similar organization
or any nationally recognized rating agency that requires access to

                                      -75-
<PAGE>
 
information about a Lender's investment portfolio in connection with ratings
issued with respect to such Lender, or (i) in connection with the exercise of
any remedy under any Loan Document.

                                      -76-
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed by their respective officers as of the day and year first above
written.

                                    EDISON MISSION HOLDINGS CO.

                                    By:
                                        --------------------------------------
                                         Name:  Kevin M. Smith
                                         Title: Vice President and Treasurer

                                    CITICORP USA, INC.,
                                    as Administrative Agent and Initial Lender

                                    By:
                                        --------------------------------------
                                         Title: Managing Director

                                    CREDIT SUISSE FIRST BOSTON,
                                    as Initial Lender

                                    By: 
                                        --------------------------------------  
                                         Title:

                                    By:
                                        -------------------------------------- 
                                         Title:

                                    LEHMAN COMMERCIAL PAPER INC.,
                                    as Initial Lender

                                    By:
                                        --------------------------------------
                                         Title:

                                      -77-
<PAGE>
 
                                    SOCIETE  GENERALE,
                                    as Initial Lender

                                    By:_____________________
                                         Title:

                                      -78-
<PAGE>
 
                                                                         ANNEX I
                                  Pricing Grid
                               364-Day Term Loans

<TABLE>
<CAPTION>
BASIS FOR                          LEVEL 1    LEVEL 2     LEVEL 3     LEVEL 4      LEVEL 5
PRICING
<S>                               <C>        <C>         <C>         <C>         <C> 
Applicable Margin                 87.50 bps  100.00 bps  112.50 bps  200.00 bps  250.00  bps
(LIBO Rate
Loans)
Applicable Margin                 0.00  bps  0.00   bps  0.00  bps   0.00  bps    0.00  bps
(Base Rate
Loans)
</TABLE>

bps = basis points per annum
<PAGE>
 
                                  Pricing Grid
                            Construction Term Loans

<TABLE>
<CAPTION>
BASIS FOR                          LEVEL 1    LEVEL 2    LEVEL 3     LEVEL 4      LEVEL 5
PRICING
<S>                               <C>        <C>        <C>         <C>         <C> 
Applicable Margin                 85.00 bps  92.50 bps  100.00 bps  175.00 bps  225.00  bps
(LIBO Rate
Loans)
Applicable Margin                 0.00  bps  0.00  bps  0.00  bps   0.00  bps    0.00  bps
(Base Rate
Loans)
Facility Fee (1)                  15.00 bps  20.00 bps  25.00 bps   50.00 bps   50.00  bps
</TABLE>


(1) Paid quarterly in arrears on each bank's commitment irrespective of usage.
bps = basis points per annum
<PAGE>
 
                                  Pricing Grid
                                Revolving Loans

<TABLE>
<CAPTION>
BASIS FOR                          LEVEL 1    LEVEL 2    LEVEL 3     LEVEL 4      LEVEL 5
PRICING
<S>                               <C>        <C>        <C>         <C>         <C> 
Applicable Margin                 85.00 bps  92.50 bps  100.00 bps  175.00 bps  225.00  bps
(LIBO Rate
Loans)
Applicable Margin                 0.00  bps  0.00  bps  0.00  bps   0.00  bps    0.00  bps
(Base Rate
Loans)
Facility Fee  (1)                 15.00 bps  20.00 bps  25.00 bps   50.00 bps   50.00  bps
</TABLE>

(1)  Paid quarterly in arrears on each bank's commitment irrespective of usage.
bps = basis points per annum
<PAGE>
 
The following applies to each of the three Pricing Grids above.

The Applicable Margin shall be determined at Level 1 so long as the Borrower's
                                             -------
Debt Rating is Baa1 or better by Moody's and BBB+  or better by S&P.
The Applicable Margin shall be determined at Level 2 so long as the Borrower's
                                             -------
Debt Rating is Baa2 by Moody's and BBB by S&P.
The Applicable Margin shall be determined at Level 3 so long as the Borrower's
                                             -------
Debt Rating is Baa3 by Moody's and BBB- by S&P.
The Applicable Margin shall be determined at Level 4 so long as the Borrower's
                                             ------- 
Debt Rating is Ba1 by Moody's and BB+ by S&P.
The Applicable Margin shall be determined at Level 5 so long as the Borrower's
                                             -------
Debt Rating is lower than Ba1 by Moody's and BB+ by S&P, or if the Borrower has
not received a final Debt Rating before June 1, 1999.

In the event that the Debt Rating established by Moody's is at a different Level
than the Debt Rating established by S&P, the lower Debt Rating shall apply and
the Level associated with such lower rating shall be the Applicable Margin,
except that, in the event that the difference is greater than one rating Level,
the average of the two Debt Ratings by Moody's and by S&P shall apply to
determine the Applicable Margin.

Changes in the Level for determining the Applicable Margin resulting from a
change in rating(s) shall become effective on the day such change in the ratings
is announced by the relevant rating agency.  In the event that the Borrower does
not maintain a Debt Rating with both Moody's and S&P, the Borrower may, with the
reasonable consent of Required Lenders, select Duff & Phelps, Fitch Investor
Services Inc. or another nationally recognized rating agency to replace Moody's
or S&P, and such replacement agency and the Debt Rating established by such
agency shall be used thereafter in the calculation of Applicable Margin in the
same fashion as the agency which no longer maintains such Debt Rating.  From the
date which the Debt Rating of Moody's or S&P ceases to be current until the date
which is 120 days thereafter, the Applicable Margin shall be determined by
reference to the Debt Ratings of Moody's and S&P most recently in effect.  In
the event that such replacement agency has not established a Debt Rating within
120 days after the Debt Rating of Moody's or S&P ceases to be current, then,
until such time as such Debt Rating is established, the Applicable Margin shall
be determined at one Level lower than the Level otherwise established based on
the remaining Debt Rating.

<PAGE>
 
                                                                  Exhibit  10.56
                                                                  EXECUTION COPY

                       GUARANTEE AND COLLATERAL AGREEMENT

                                    made by

                          EDISON MISSION HOLDINGS CO.,
                          EDISON MISSION FINANCE CO.,
                      HOMER CITY PROPERTY HOLDINGS, INC.,
                           CHESTNUT RIDGE ENERGY CO.,
                         MISSION ENERGY WESTSIDE, INC.,
                         EME HOMER CITY GENERATION L.P.
                                      and
                             EDISON MISSION ENERGY

                                  in favor of

                    UNITED STATES TRUST COMPANY OF NEW YORK,
                              as Collateral Agent


                           Dated as of March 18, 1999
<PAGE>
 
                               TABLE OF CONTENTS
<TABLE>
                                                                                                            Page
<S>                                                                                                        <C>
  SECTION 1.  DEFINED TERMS..............................................................................      2
     1.1  Definitions....................................................................................      2
     1.2  Other Definitional Provisions..................................................................      7
 
          SECTION 2.  GUARANTEE..........................................................................      8
     2.1  Guarantee......................................................................................      8
     2.2  Right of Contribution..........................................................................      9
     2.3  No Subrogation.................................................................................      9
     2.4  Amendments, etc. with respect to the Borrower Obligations......................................      9
     2.5  Guarantee Absolute and Unconditional...........................................................     10
     2.6  Reinstatement..................................................................................     11
     2.7  Payments.......................................................................................     11
 
  SECTION 3.  GRANT OF SECURITY INTEREST.................................................................     11
 
  SECTION 4.  REPRESENTATIONS AND WARRANTIES.............................................................     12
     4.1  Title; No Other Liens..........................................................................     12
     4.2  Perfected First Priority Liens.................................................................     12
     4.3  Chief Executive Office.........................................................................     12
     4.4  Inventory and Equipment........................................................................     13
     4.5  Investment Property............................................................................     13
     4.6  Receivables....................................................................................     13
     4.7  Contracts......................................................................................     13
 
  SECTION 5.  COVENANTS..................................................................................     14
     5.1  Delivery of Instruments, Certificated Securities and Chattel Paper.............................     14
     5.2  Maintenance of Perfected Security Interest; Further Documentation..............................     14
     5.3  Changes in Locations, Name, etc................................................................     15
     5.4  Notices........................................................................................     15
     5.5  Investment Property............................................................................     15
 
  SECTION 6.  REMEDIAL PROVISIONS........................................................................     16
     6.1  Certain Matters Relating to Receivables........................................................     16
     6.2  Communications with Obligors; Grantors Remain Liable...........................................     17
     6.3  Investment Property............................................................................     17
     6.4  Proceeds to be Turned Over To Collateral Agent.................................................     18
     6.5  Application of Proceeds........................................................................     19
     6.6  Code and Other Remedies........................................................................     19
     6.7  Pledged Stock and Pledged Interests............................................................     20
     6.8  Waiver; Deficiency.............................................................................     20
 
  SECTION 7.  THE COLLATERAL AGENT.......................................................................     20
</TABLE>
                                       i



<PAGE>
 
<TABLE>
<CAPTION> 
                                                                                                                Page

<S>                                                                                                         <C>
     7.1  Collateral Agent's Appointment as Attorney-in-Fact, etc.........................................       20
     7.2  Duty of Collateral Agent........................................................................       22
     7.3  Execution of Financing Statements...............................................................       23
     7.4  Authority of Collateral Agent...................................................................       23
 
  SECTION 8.  MISCELLANEOUS...............................................................................       23
     8.1  Amendments in Writing...........................................................................       23
     8.2  Notices.........................................................................................       23
     8.3  No Waiver by Course of Conduct; Cumulative Remedies.............................................       23
     8.4  Enforcement Expenses; Indemnification...........................................................       24
     8.5  Successors and Assigns..........................................................................       24
     8.6  Set-Off.........................................................................................       24
     8.7  Counterparts....................................................................................       25
     8.8  Severability....................................................................................       25
     8.9  Section Headings................................................................................       25
     8.10  Integration....................................................................................       25
     8.11  GOVERNING LAW..................................................................................       25
     8.12  Submission To Jurisdiction; Waivers............................................................       26
     8.13  Acknowledgements...............................................................................       26
     8.14  Releases.......................................................................................       27
     8.15  WAIVER OF JURY TRIAL...........................................................................       27
</TABLE> 
         
<TABLE> 

         
<S>           <C> 
 SCHEDULES
 Schedule 1    Notice Addresses
 Schedule 2    Investment Property
 Schedule 3    Perfection Matters
 Schedule 4    Jurisdictions of Organization and Chief Executive Offices
 Schedule 5    Inventory and Equipment Locations
 Schedule 6    Certain Contracts   
</TABLE>
                                      ii


<PAGE>
 
          GUARANTEE AND COLLATERAL AGREEMENT, dated as of March 18, 1999, made
by (i) EDISON MISSION HOLDINGS CO., a California corporation (the "Borrower"),
                                                                   -------- 
(ii) EDISON MISSION FINANCE CO., a California corporation ("Edison Mission
                                                            --------------
Finance"), (iii) HOMER CITY PROPERTY HOLDINGS, INC., a California corporation
- -------
("Homer City Holdings"), (iv) CHESTNUT RIDGE ENERGY CO., a California
  -------------------
corporation ("Chestnut Ridge"), (v) MISSION ENERGY WESTSIDE, INC., a California
              --------------
corporation ("MEW"), (vi) EME HOMER CITY GENERATION L.P., a Pennsylvania limited
              --- 
partnership ("EME Homer City") and (vii) EDISON MISSION ENERGY, a California
              --------------
corporation ("Edison Mission Energy"; and, together with the Borrower, Edison
              ---------------------
Mission Finance, Homer City Holdings, Chestnut Ridge, MEW and EME Homer City,
the "Grantors") in favor of UNITED STATES TRUST COMPANY OF NEW YORK, as
     --------
collateral agent for the Secured Parties (as defined below) (in such capacity,
the "Collateral Agent").
     ----------------

                                    RECITALS
                                    --------

          A.  The Borrower has entered into a Credit Agreement, dated as of
March 18, 1999 (as the same may be amended, supplemented or otherwise modified
from time to time, the "Credit Agreement"), with certain financial institutions
                        ----------------
(collectively, the "Lenders") and Citicorp USA, Inc., as administrative agent
                    -------
for the Lenders (in such capacity, the "Administrative Agent").
                                        --------------------

          B.  Pursuant to the Credit Agreement, the Lenders have severally
agreed to make Loans (as defined below) to the Borrower upon the terms and
subject to the conditions set forth therein.

          C.  The Borrower will use the proceeds of the Loans under the Credit
Agreement to make valuable transfers to one or more of the other Grantors in
connection with the acquisition of the Homer City Electric Generating Station
and certain facilities and other assets associated therewith and ancillary
thereto (the "Generating Station"), certain capital expenditures related to the
              ------------------
Generating Station and general working capital purposes.

          D.  Under Section 8.2.1(e) of the Credit Agreement, the Borrower is
permitted to incur certain indebtedness for the purpose of refinancing the Loans
and other indebtedness of the Borrower ("Refinancing Indebtedness"); under
                                         ------------------------  
Section 8.2.1(d)(i) of the Credit Agreement, the Loan Parties are permitted to
incur certain indebtedness in the form of reimbursement obligations relating to
letters of credit, surety bonds and performance bonds used by the Loan Parties
in the ordinary course of their business ("Ordinary Course Letter of Credit
                                           --------------------------------
Indebtedness"); under  Section 8.2.1(d)(ii) of the Credit Agreement, the
- ------------
Borrower is permitted to incur certain indebtedness in the form of reimbursement
obligations relating to Debt Service Reserve Letters of Credit (as defined
below) ("DSR Letter of Credit Indebtedness"); under Section 8.2.1(c) of the
         ---------------------------------
Credit Agreement, the Borrower is permitted to incur certain additional
indebtedness ("Additional Indebtedness"); and, under Section 8.2.1(b) of the
               ----------------------- 
Credit Agreement, the Borrower is permitted to incur certain indebtedness under
Interest Rate Hedging Transactions entered into with respect to the Loans ("Swap
                                                                            ----
Indebtedness").
- ------------
<PAGE>
 
                                                                               2

          E.  In satisfaction of the requirements of the Lenders and the Persons
providing any Refinancing Indebtedness, Ordinary Course Letter of Credit
Indebtedness, DSR Letter of Credit Indebtedness, Additional Indebtedness or Swap
Indebtedness, the Grantors desire by this Agreement and the other Security
Documents (as defined below) to provide a common pool of collateral as security
for their obligations under the Credit Agreement and the other Financing
Documents (as defined below).

          F.  In order to simplify administration of such collateral and to
provide for the orderly enforcement of their respective rights, the
Administrative Agent, the Lenders and the other Secured Parties (as defined
below) have appointed the Collateral Agent to serve as their common
representative, to be the beneficiary under any guarantee intended to benefit
the Secured Parties, and to hold the liens created, or to be created, under the
Financing Documents.

          G.  Pursuant to the Collateral Agency and Intercreditor Agreement,
dated as of March 18, 1999 (as amended, supplemented or otherwise modified from
time to time, the "Collateral Agency and Intercreditor Agreement"), among the
                   ---------------------------------------------
Borrower, the Administrative Agent, the Collateral Agent and certain other
parties, the Collateral Agent has agreed to serve as a common collateral agent
for all Secured Parties.

          H.  The Borrower is a member of an affiliated group of companies that
includes each other Grantor.  The Borrower and the other Grantors are engaged in
related businesses, and each Grantor will derive substantial direct and indirect
benefit from the making of the Loans and the incurrence of any Refinancing
Indebtedness, Ordinary Course Letter of Credit Indebtedness, DSR Letter of
Credit Indebtedness, Additional Indebtedness or Swap Indebtedness.

          I.  It is a condition precedent to the obligation of the Lenders to
make their respective Loans to the Borrower under the Credit Agreement that the
Grantors shall have executed and delivered this Agreement to the Collateral
Agent for the benefit of the Secured Parties.

          NOW, THEREFORE, in consideration of the premises, each Grantor hereby
agrees with the Collateral Agent, for the benefit of the Secured Parties, as
follows:

                           SECTION 1.  DEFINED TERMS

          1.1  Definitions.  (a)  Unless otherwise defined herein, terms defined
               -----------
in the Credit Agreement and used herein shall have the meanings given to them in
the Credit Agreement, and the following terms are used herein as defined in the
New York UCC:  Accounts, Chattel Paper, Documents, Equipment, Instruments and
Inventory.

          (b)  The following terms shall have the following meanings:

          "Additional Indebtedness":  as defined in the recitals.
           -----------------------                      --------
<PAGE>
 
                                                                               3

          "Administrative Agent":  as defined in the recitals.
           --------------------                      -------- 

          "Agreement":  this Guarantee and Collateral Agreement, as the same may
           --------- 
     be amended, supplemented or otherwise modified from time to time.

          "Borrower":  as defined in the preamble.
           --------                      -------- 

          "Borrower Obligations": the collective reference to (a) the unpaid
           --------------------
     principal of and interest on the Loans, (b) the unpaid principal of and
     interest on the Refinancing Indebtedness, if any, (c) the unpaid principal
     of and interest on the Ordinary Letter of Credit Indebtedness, if any, (d)
     the unpaid principal of and interest on the DSR Letter of Credit
     Indebtedness, if any, (e) the unpaid principal of and interest on the
     Additional Indebtedness, if any, (f) the unpaid amount of the Swap
     Indebtedness, if any, and (g) all other obligations and liabilities of the
     Borrower (including interest accruing at the then applicable rate or rates
     provided in the Financing Documents after the maturity of the Loans,
     Refinancing Indebtedness, Ordinary Course Letter of Credit Indebtedness,
     DSR Letter of Credit Indebtedness, Additional Indebtedness and/or Swap
     Indebtedness, as applicable, and interest accruing at the then applicable
     rate or rates provided in the Financing Documents after the filing of any
     petition in bankruptcy, or the commencement of any insolvency,
     reorganization or like proceeding, relating to the Borrower, whether or not
     a claim for post-filing or post-petition interest is allowed in such
     proceeding) to the Secured Parties, whether direct or indirect, absolute or
     contingent, due or to become due, or now existing or hereafter incurred,
     which may arise under, out of, or in connection with, any Financing
     Document or any other document made, delivered or given in connection with
     any of the foregoing, in each case whether on account of principal,
     interest, reimbursement obligations, guarantee obligations, fees,
     indemnities, costs, expenses or otherwise (including all fees and
     disbursements of counsel to the Collateral Agent or to the Secured Parties
     that are required to be paid by the Borrower pursuant to the terms of any
     Financing Document).

          "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.

          "Certificated Security":  the collective reference to (i) any
           ---------------------
     "certificated security" as defined in Section 8-102 of the New York UCC and
     (ii) all limited liability company certificates, partnership interest
     certificates and certificated options therefor that may be issued or
     granted by any Issuer.

          "Chestnut Ridge":  as defined in the preamble.
           --------------                      --------
            
          "Collateral":  as defined in Section 3.
           ----------                  ---------

<PAGE>
 
                                                                               4

          "Collateral Account":  any collateral account established by the
           ------------------
     Collateral Agent as provided in Section 6.1 or 6.4.
                                     -----------    ---

          "Collateral Agency and Intercreditor Agreement":  as defined in the
           ---------------------------------------------
recitals.
- --------

          "Collateral Agent":  as defined in the preamble.
           ----------------                      --------  

          "Commitments":  as defined in the Credit Agreement.
           -----------   

          "Contracts":  the contracts and agreements listed in Schedule 6, as
           ---------                                           ---------- 
     the same may be amended, supplemented or otherwise modified from time to
     time, including (i) all rights of any Grantor to receive moneys due and to
     become due to it thereunder or in connection therewith, (ii) all rights of
     any Grantor to damages arising thereunder and (iii) all rights of any
     Grantor to perform and to exercise all remedies thereunder.

          "Credit Agreement":  as defined in the preamble.
           ----------------                      --------
          "Debt Service Reserve Letter of Credit":  as defined in the Security
           -------------------------------------
     Deposit Agreement.

          "DSR Letter of Credit Indebtedness":  as defined in the recitals.
           ---------------------------------                      --------   

          "Deposit Account":  as defined in the Uniform Commercial Code of any
           ---------------
     applicable jurisdiction and, in any event, including any demand, time,
     savings, passbook or like account maintained with a depositary institution.

          "Edison Mission Energy":  as defined in the preamble.
           ---------------------                      --------

          "Edison Mission Finance":  as defined in the preamble.
           ----------------------                      --------  

          "EME Homer City":  as defined in the preamble.
           --------------                      --------   

          "Event of Default":  as defined in the Credit Agreement and any other
           ----------------
     Financing Document.

          "Financing Documents":  the Loan Documents and each indenture, loan
           -------------------
     agreement, underwriting agreement, security purchase agreement or other
     document entered into in connection with any Senior Debt.

          "General Intangibles":  all "general intangibles" as such term is
           ------------------- 
     defined in Section 9-106 of the New York UCC and, in any event, including
     with respect to any Grantor, all contracts, agreements, instruments and
     indentures in any form, and portions thereof, to which such Grantor is a
     party or under which such Grantor has any right, title or interest or to
     which such Grantor or any property of such Grantor is subject, as the same
     may
<PAGE>
 
                                                                               5

     from time to time be amended, supplemented or otherwise modified, including
     (i) all rights of such Grantor to receive moneys due and to become due to
     it thereunder or in connection therewith, (ii) all rights of such Grantor
     to damages arising thereunder and (iii) all rights of such Grantor to
     perform and to exercise all remedies thereunder, in each case to the extent
     the grant by such Grantor of a security interest pursuant to this Agreement
     in its right, title and interest in such contract, agreement, instrument or
     indenture is not prohibited by such contract, agreement, instrument or
     indenture without the consent of any other party thereto, would not give
     any other party to such contract, agreement, instrument or indenture the
     right to terminate its obligations thereunder, or is permitted with consent
     if all necessary consents to such grant of a security interest have been
     obtained from the other parties thereto (it being understood that the
     foregoing shall not be deemed to obligate such Grantor to obtain such
     consents); provided, that the foregoing limitation shall not affect, limit,
                -------- 
     restrict or impair the grant by such Grantor of a security interest
     pursuant to this Agreement in any Receivable or any money or other amounts
     due or to become due under any such contract, agreement, instrument or
     indenture to the extent provided in Section 9-318(4) of the New York UCC.

          "Grantors":  as defined in the preamble.
           --------                      -------- 

          "Guarantor Obligations":  with respect to any Guarantor, all
           ---------------------
     obligations and liabilities of such Guarantor which may arise under or in
     connection with this Agreement or any other Financing Document to which
     such Guarantor is a party, in each case whether on account of guarantee
     obligations, reimbursement obligations, fees, indemnities, costs, expenses
     or otherwise (including all fees and disbursements of counsel to the
     Collateral Agent and to the Secured Parties that are required to be paid by
     such Guarantor pursuant to the terms of any Financing Document).

          "Guarantors":  the collective reference to each Grantor other than the
           ---------- 
     Borrower and Edison Mission Energy.

          "Homer City Holdings":  as defined in the preamble.
           -------------------                      --------- 
          "Intercompany Loan Subordination Agreement":  the Intercompany Loan
           -----------------------------------------
     Subordination Agreement, dated as of March 18, 1999, among the Loan Parties
     and the Collateral Agent.

          "Intercompany Note":  any promissory note or other evidence of loans
           -----------------
     made by any Grantor to the Borrower or any of its Subsidiaries.

          "Investment Property":  the collective reference to (i) all
           -------------------
     "investment property" as such term is defined in Section 9-115 of the New
     York UCC and (ii) whether or not constituting "investment property" as so
     defined, all Pledged Stock, all Pledged Interests and all Pledged Notes.
<PAGE>
 
                                                                               6

          "Issuers":  the collective reference to each issuer of any Investment
           -------
     Property.

          "Loans":  as defined in the Credit Agreement.
           -----

          "MEW":  as defined in the preamble.
           ---

          "Mortgage and Security Agreement":  the Open-End Mortgage, Security
           -------------------------------
     Agreement and Assignment of Rents, dated as of March 18, 1999, among the
     Grantors and the Collateral Agent, as the same may be amended, supplemented
     or otherwise modified from time to time.

          "New York UCC":  the Uniform Commercial Code as from time to time in
           ------------ 
     effect in the State of New York.

          "Obligations":  (i) in the case of the Borrower, the Borrower
           -----------
     Obligations, and (ii) in the case of each Guarantor, its Guarantor
     Obligations.

          "Ordinary Course Letter of Credit Indebtedness":  as defined in the
           ---------------------------------------------
     recitals.

          "Person":  any natural person, corporation, partnership, limited
           ------
     liability company, firm, association, trust, government, governmental
     agency or other entity, whether acting in an individual, fiduciary or other
     capacity.

          "Pledged Interests":  the partnership interests listed on Schedule 2,
           -----------------                                        ----------
     together with all certificates, options or rights of any nature whatsoever
     that may be issued or granted to any Grantor in respect of such partnership
     interests.

          "Pledged Notes":  all promissory notes listed on Schedule 2, all
           -------------                                   ----------
     Intercompany Notes at any time issued to any Grantor and all other
     promissory notes issued to or held by any Grantor (other than promissory
     notes issued in connection with extensions of trade credit by any Grantor
     in the ordinary course of business).

          "Pledged Stock":  the shares of Capital Stock listed on Schedule 2,
           -------------                                          ----------
     together with any other shares, stock certificates, options or rights of
     any nature whatsoever in respect of the Capital Stock of any Person that
     may be issued or granted to, or held by, any Grantor while this Agreement
     is in effect.

          "Proceeds":  all "proceeds" as such term is defined in Section 9-
           --------
     306(1) of the New York UCC and, in any event, shall include all dividends
     or other income from the Investment Property, collections thereon or
     distributions or payments with respect thereto.

          "Receivable":  any right to payment for goods sold or leased or for
           ----------
     services rendered, whether or not such right is evidenced by an Instrument
     or Chattel Paper and whether or not it has been earned by performance
     (including any Account).
<PAGE>
 
                                                                               7

          "Refinancing Indebtedness":  as defined in the recitals.
           ------------------------                      --------

          "Required Secured Parties":  as defined in the Collateral Agency and
           ------------------------
     Intercreditor Agreement.

          "Secured Parties":  the Collateral Agent, the Administrative Agent,
           ---------------
     the Lenders, each Person that provides any Refinancing Indebtedness,
     Ordinary Course Letter of Credit Indebtedness, DSR Letter of Credit
     Indebtedness, Additional Indebtedness or Swap Indebtedness and each Person
     that serves as indenture trustee, collateral agent, lenders' representative
     or in any similar capacity for Persons that provide any Senior Debt.

          "Securities Act":  the Securities Act of 1933, as amended.
           --------------

          "Security Deposit Agreement":  the Security Deposit Agreement, dated
           --------------------------
     as of March 18, 1999, among the Loan Parties and the Collateral Agent.

               "Security Documents":  (a) this Agreement, the Mortgage and
                ------------------
     Security Agreement, the Security Deposit Agreement, the Intercompany Loan
     Subordination Agreement and the Collateral Agency and Intercreditor
     Agreement and (b) the EME Credit Support Guarantee and any other agreement
     or instrument hereafter entered into by the Borrower or any other Person
     which guarantees or secures payment of any Senior Debt.

          "Senior Debt":  the Loans, any Refinancing Indebtedness, any Ordinary
           -----------
Course Letter of Credit Indebtedness, any DSR Letter of Credit Indebtedness, any
Additional Indebtedness and any Swap Indebtedness.

          "Swap Indebtedness":  as defined in the recitals.
           -----------------                      --------

          1.2  Other Definitional Provisions.  (a)  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, appendix and exhibit references are to this
Agreement unless otherwise specified.

          (b)  Each reference in this Agreement to a Financing Document or other
agreement shall be deemed to refer to such Financing Document or other agreement
as the same may be amended, supplemented or otherwise modified  from time to
time.

          (c)  Any term defined by reference to an agreement, instrument or
other document shall have the meaning so assigned to it whether or not such
agreement, instrument or document is in effect.

          (d)  Each reference in this Agreement to a Person shall be deemed to
include such Person's successors and assigns.
<PAGE>
 
                                                                               8

          (e)  Each reference in this Agreement to a Requirement of Law shall be
deemed to refer to such Requirement of Law as the same may be amended,
supplemented or otherwise modified from time to time.

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

                             SECTION 2.  GUARANTEE

          2.1  Guarantee.  (a)  Each of the Guarantors hereby, jointly and
               ---------
severally, unconditionally and irrevocably, guarantees to the Collateral Agent,
for the benefit of the Secured Parties, the prompt and complete payment and
performance by the Borrower when due (whether at the stated maturity, by
acceleration or otherwise) of the Borrower Obligations.

          (b)  Anything in any Financing Document to the contrary
notwithstanding, the maximum liability of each Guarantor under the Financing
Documents shall in no event exceed the amount which can be guaranteed by such
Guarantor under applicable federal and state laws relating to the insolvency of
debtors (after giving effect to the right of contribution established in Section
                                                                         -------
2.2).
- ---

          (c)  Each Guarantor agrees that the Borrower Obligations may at any
time and from time to time exceed the amount of the liability of such Guarantor
hereunder without impairing the guarantee contained in this Section 2 or
                                                            ---------
affecting the rights and remedies of the Collateral Agent or any Secured Party
hereunder.

          (d)  The guarantee contained in this Section 2 shall remain in full
                                               ---------
force and effect until all the Borrower Obligations and the obligations of each
Guarantor under the guarantee contained in this Section 2 shall have been
                                                ---------
satisfied by payment in full and the Commitments shall have been terminated.

          (e)  No payment made by the Borrower, any of the Guarantors, any other
guarantor or any other Person or received or collected by the Collateral Agent
or any Secured Party from the Borrower, any of the Guarantors, any other
guarantor or any other Person by virtue of any action or proceeding or any set-
off or appropriation or application at any time or from time to time in
reduction of or in payment of the Borrower Obligations shall be deemed to
modify, reduce, release or otherwise affect the liability of any Guarantor
hereunder which shall, notwithstanding any such payment (other than any payment
made by such Guarantor in respect of the Borrower Obligations or any payment
received or collected from such Guarantor in respect of the Borrower
Obligations), remain liable for the Borrower Obligations up to the maximum
liability of such Guarantor hereunder until the Borrower Obligations are paid in
full and the Commitments are terminated.
<PAGE>
 
                                                                               9

          2.2  Right of Contribution.  Each Guarantor hereby agrees that to the
               ---------------------
extent that a Guarantor shall have paid more than its proportionate share of any
payment made hereunder, such Guarantor shall be entitled to seek and receive
contribution from and against any other Guarantor hereunder which has not paid
its proportionate share of such payment.  Each Guarantor's right of contribution
shall be subject to the terms and conditions of Section 2.3.  The provisions of
                                                -----------
this Section 2.2 shall in no respect limit the obligations and liabilities of
     -----------
any Guarantor to the Collateral Agent and the Secured Parties, and each
Guarantor shall remain liable to the Collateral Agent and the Secured Parties
for the full amount guaranteed by such Guarantor hereunder.

          2.3  No Subrogation.  Notwithstanding any payment made by any
               --------------
Guarantor hereunder or any set-off or application of funds of any Guarantor by
the Collateral Agent or any Secured Party, no Guarantor shall be entitled to be
subrogated to any of the rights of the Collateral Agent or any Secured Party
against the Borrower or any other Guarantor or any collateral security or
guarantee or right of offset held by the Collateral Agent or any Secured Party
for the payment of the Borrower Obligations, nor shall any Guarantor seek or be
entitled to seek any contribution or reimbursement from the Borrower or any
other Guarantor in respect of payments made by such Guarantor hereunder, until
all amounts owing to the Collateral Agent and the Secured Parties by the
Borrower on account of the Borrower Obligations are paid in full and the
Commitments are terminated.  If any amount shall be paid to any Guarantor on
account of such subrogation rights at any time when all of the Borrower
Obligations shall not have been paid in full, such amount shall be held by such
Guarantor in trust for the Collateral Agent and the Secured Parties, segregated
from other funds of such Guarantor, and shall, forthwith upon receipt by such
Guarantor, be turned over to the Collateral Agent in the exact form received by
such Guarantor (duly indorsed by such Guarantor to the Collateral Agent, if
required), to be applied against the Borrower Obligations, whether matured or
unmatured, in such order as the Collateral Agent may determine.

          2.4  Amendments, etc. with respect to the Borrower Obligations.  Each
               ---------------------------------------------------------
Guarantor shall remain obligated hereunder notwithstanding that, without any
reservation of rights against any Guarantor and without notice to or further
assent by any Guarantor, any demand for payment of any of the Borrower
Obligations made by the Collateral Agent or any Secured Party may be rescinded
by the Collateral Agent or such Secured Party and any of the Borrower
Obligations continued, and the Borrower Obligations, or the liability of any
other Person upon or for any part thereof, or any collateral security or
guarantee therefor or right of offset with respect thereto, may, from time to
time, in whole or in part, be renewed, extended, amended, modified, accelerated,
compromised, waived, surrendered or released by the Collateral Agent or any
Secured Party, and the Financing Documents and any other documents executed and
delivered in connection therewith may be amended, modified, supplemented or
terminated, in whole or in part, as the Collateral Agent may deem advisable from
time to time, and any collateral security, guarantee or right of offset at any
time held by the Collateral Agent or any Secured Party for the payment of the
Borrower Obligations may be sold, exchanged, waived, surrendered or released.
Neither the Collateral Agent nor any Secured Party shall have any obligation to
protect, secure, perfect or insure any Lien at any time held by it as security
for the Borrower Obligations or for the guarantee contained in this Section 2 or
                                                                    ---------
any property subject thereto.
<PAGE>
 
                                                                              10

          2.5  Guarantee Absolute and Unconditional.  Each Guarantor waives any
               ------------------------------------
and all notice of the creation, renewal, extension or accrual of any of the
Borrower Obligations and notice of or proof of reliance by the Collateral Agent
or any Secured Party upon the guarantee contained in this Section 2 or
                                                          ---------
acceptance of the guarantee contained in this Section 2; the Borrower
                                              ---------
Obligations, and any of them, shall conclusively be deemed to have been created,
contracted or incurred, or renewed, extended, amended or waived, in reliance
upon the guarantee contained in this Section 2; and all dealings between the
                                     ---------
Borrower and any of the Guarantors, on the one hand, and the Collateral Agent
and the Secured Parties, on the other hand, likewise shall be conclusively
presumed to have been had or consummated in reliance upon the guarantee
contained in this Section 2.  Each Guarantor waives diligence, presentment,
                  ---------
protest, demand for payment and notice of default or nonpayment to or upon the
Borrower or any of the Guarantors with respect to the Borrower Obligations.
Each Guarantor understands and agrees that the guarantee contained in this
Section 2 shall be construed as a continuing, absolute and unconditional
- ---------
guarantee of payment without regard to (a) the validity or enforceability of any
Financing Document, any of the Borrower Obligations or any other collateral
security therefor or guarantee or right of offset with respect thereto at any
time or from time to time held by the Collateral Agent or any Secured Party, (b)
any defense, set-off or counterclaim (other than a defense of payment or
performance) which may at any time be available to or be asserted by the
Borrower or any other Person against the Collateral Agent or any Secured Party,
or (c) any other circumstance whatsoever (with or without notice to or knowledge
of the Borrower or such Guarantor) which constitutes, or might be construed to
constitute, an equitable or legal discharge of the Borrower for the Borrower
Obligations, or of such Guarantor under the guarantee contained in this Section
                                                                        -------
2, in bankruptcy or in any other instance.  When making any demand hereunder or
- -
otherwise pursuing its rights and remedies hereunder against any Guarantor, the
Collateral Agent or any Secured Party may, but shall be under no obligation to,
make a similar demand on or otherwise pursue such rights and remedies as it may
have against the Borrower, any other Guarantor or any other Person or against
any collateral security or guarantee for the Borrower Obligations or any right
of offset with respect thereto, and any failure by the Collateral Agent or any
Secured Party to make any such demand, to pursue such other rights or remedies
or to collect any payments from the Borrower, any other Guarantor or any other
Person or to realize upon any such collateral security or guarantee or to
exercise any such right of offset, or any release of the Borrower, any other
Guarantor or any other Person or any such collateral security, guarantee or
right of offset, shall not relieve any Guarantor of any obligation or liability
hereunder, and shall not impair or affect the rights and remedies, whether
express, implied or available as a matter of law, of the Collateral Agent or any
Secured Party against any Guarantor.  For the purposes hereof "demand" shall
include the commencement and continuance of any legal proceedings.

          2.6  Reinstatement.  The guarantee contained in this Section 2 shall
               -------------                                   ---------
continue to be effective, or be reinstated, as the case may be, if at any time
payment, or any part thereof, of any of the Borrower Obligations is rescinded or
must otherwise be restored or returned by the Collateral Agent or any Secured
Party upon the insolvency, bankruptcy, dissolution, liquidation or
reorganization of the Borrower or any Guarantor, or upon or as a result of the
appointment of a receiver, intervenor or conservator of, or trustee or similar
officer for, the Borrower or any
<PAGE>
 
                                                                              11

Guarantor or any substantial part of its property, or otherwise, all as though
such payments had not been made.

          2.7  Payments.  Each Guarantor hereby guarantees that payments
               --------
hereunder will be paid to the Collateral Agent without set-off or counterclaim
in Dollars at the office of the Collateral Agent for deposit in the "Homer City
Revenue Account", account no. 09039700, or to such other place as the Collateral
Agent may specify in writing.

                     SECTION 3.  GRANT OF SECURITY INTEREST

          (a)  Each Grantor (other than Edison Mission Energy) hereby pledges
and grants to the Collateral Agent, for the benefit of the Secured Parties, a
security interest in all of the following property now owned or at any time
hereafter acquired by such Grantor or in which such Grantor now has or at any
time in the future may acquire any right, title or interest (collectively, the
"Collateral"), as collateral security for the prompt and complete payment and
 ----------
performance when due (whether at the stated maturity, by acceleration or
otherwise) of such Grantor's Obligations:

          (i)    all Accounts;

          (ii)   all Chattel Paper;

          (iii)  all Contracts;

          (iv)   all Deposit Accounts;

          (v)    all Documents;

          (vi)   all Equipment;

          (vii)  all General Intangibles;

          (viii) all Instruments;

          (ix)   all Inventory;

          (x)    all Investment Property;

          (xi)   all other property not otherwise described above;

          (xii)  all books and records pertaining to the Collateral; and
<PAGE>
 
                                                                              12

          (xiii)  to the extent not otherwise included, all Proceeds and
     products of any and all of the foregoing and all collateral security and
     guarantees given by any Person with respect to any of the foregoing.

          (b)  Edison Mission Energy hereby pledges and grants to the Collateral
Agent, for the benefit of the Secured Parties, a security interest in all shares
of Capital Stock of the Borrower, as collateral security for the prompt and
complete payment and performance when due (whether at stated maturity, by
acceleration or otherwise) by the Borrower of all Borrower Obligations.

          SECTION 4.  REPRESENTATIONS AND WARRANTIES

          Each Grantor hereby represents and warrants, with respect to itself
and its Collateral, to the Collateral Agent and each Secured Party that:

          4.1  Title; No Other Liens.  Except for the security interest granted
               ---------------------
to the Collateral Agent pursuant to this Agreement and the other Liens permitted
to exist on the Collateral by the Financing Documents, such Grantor owns each
item of the Collateral free and clear of any and all Liens or claims of others.
No financing statement or other public notice with respect to all or any part of
the Collateral is on file or of record in any public office, except such as have
been filed in favor of the Collateral Agent pursuant to this Agreement or as are
permitted by the Financing Documents.

          4.2  Perfected First Priority Liens.  The security interests granted
               ------------------------------
pursuant to this Agreement upon completion of the filings and other actions
specified on Schedule 3 (which, in the case of all filings and other documents
             ----------
referred to on said Schedule, have been delivered to the Collateral Agent in
                    --------
completed and duly executed form) will (a) constitute valid and enforceable
perfected security interests in all of the Collateral in favor of the Collateral
Agent as collateral security for such Grantor's Obligations to the extent that a
security interest may be perfected by filing and/or the other actions specified
on Schedule 3, and (b) are prior to all other Liens on the Collateral in
   ----------
existence on the date hereof except for Liens permitted by the Financing
Documents and which have priority over the Liens on the Collateral by operation
of law.

          4.3  Chief Executive Office.  On the date hereof, such Grantor's
               ----------------------
jurisdiction of organization and the location of such Grantor's chief executive
office or sole place of business are specified on Schedule 4.
                                                  ----------

          4.4  Inventory and Equipment.  On the date hereof, the Inventory and
               -----------------------
the Equipment (other than mobile goods) are kept at the locations listed on
Schedule 5.
- ----------

          4.5  Investment Property.  (a)  The shares of Pledged Stock pledged by
               -------------------
such Grantor hereunder constitute all the issued and outstanding shares of all
classes of the Capital Stock of each Issuer owned by such Grantor.
<PAGE>
 
                                                                              13
          (b)  All the shares of the Pledged Stock have been duly and validly
issued and are fully paid and nonassessable.

          (c)  The Pledged Interests pledged by such Grantor hereunder
constitute all the issued and outstanding partnership or other equity interests
owned by such Grantor.

          (d)  All the Pledged Interests pledged by such Grantor have been duly
and validly issued.

          (e)  Such Grantor is the record and beneficial owner of, and has good
and marketable title to, the Investment Property pledged by it hereunder, free
of any and all Liens or options in favor of, or claims of, any other Person,
except the security interest created by this Agreement.

          4.6  Receivables.  (a) No amount payable to such Grantor under or in
               -----------
connection with any Receivable is evidenced by any Instrument or Chattel Paper
which has not been delivered to the Collateral Agent.

          (b)  Except as otherwise disclosed on Schedule 6, none of the obligors
                                                ----------
on any Receivables is a Governmental Authority.

          4.7  Contracts.  (a)  No consent of any party (other than such
               ---------
Grantor) to any Contract is required, or purports to be required, in connection
with the execution, delivery and performance of this Agreement.

          (b)  Neither such Grantor nor (to the best of such Grantor's
knowledge) any of the other parties to the Contracts to which such Grantor is a
party is in default in the performance or observance of any of the terms thereof
in any manner that, in the aggregate, could reasonably be expected to have a
Material Adverse Effect.

          (c)  The right, title and interest of such Grantor in, to and under
the Contracts are not subject to any defenses, offsets, counterclaims or claims
that, in the aggregate, could reasonably be expected to have a Material Adverse
Effect.

          (d)  No amount payable to such Grantor under or in connection with any
Contract is evidenced by any Instrument or Chattel Paper which has not been
delivered to the Collateral Agent.

          (e)  Except as otherwise disclosed on Schedule 6, none of the parties
                                                ----------
to any Contract is a Governmental Authority.
<PAGE>
 
                                                                              14

                             SECTION 5.  COVENANTS

          Each Grantor covenants and agrees with the Collateral Agent and the
Secured Parties that, from and after the date of this Agreement until the
Obligations shall have been paid in full and the Commitments shall have
terminated:

          5.1  Delivery of Instruments, Certificated Securities and Chattel
               ------------------------------------------------------------
Paper.  If any amount payable under or in connection with any of the Collateral
- -----
shall be or become evidenced by any Instrument, Certificated Security or Chattel
Paper, such Instrument, Certificated Security or Chattel Paper shall be
immediately delivered to the Collateral Agent, duly indorsed in a manner
satisfactory to the Collateral Agent, to be held as Collateral pursuant to this
Agreement.

          5.2  Maintenance of Perfected Security Interest; Further
               ---------------------------------------------------
Documentation.  (a)  Such Grantor shall take any and all actions that may be
- -------------
necessary or, in the reasonable discretion of the Collateral Agent, prudent to
maintain the security interest created by this Agreement as a perfected security
interest having at least the priority described in Section 4.2 and shall defend
                                                   ----------- 
such security interest against the claims and demands of all Persons whomsoever.

          (b)  Such Grantor will furnish to the Collateral Agent and the Secured
Parties from time to time statements and schedules further identifying and
describing the Collateral and such other reports in connection therewith as the
Collateral Agent may reasonably request, all in reasonable detail.

          (c)  At any time and from time to time, upon the written request of
the Collateral Agent, and at the sole expense of such Grantor, such Grantor will
promptly and duly execute and deliver, and have recorded, such further
instruments and documents and take such further actions as the Collateral Agent
may reasonably request for the purpose of obtaining or preserving the full
benefits of this Agreement and of the rights and powers herein granted,
including (i) filing any financing or continuation statements under the Uniform
Commercial Code (or other similar laws) in effect in any jurisdiction with
respect to the security interests created hereby and (ii) in the case of
Investment Property, Deposit Accounts and any other relevant Collateral, taking
any actions necessary to enable the Collateral Agent to obtain "control" (within
the meaning of the applicable Uniform Commercial Code) with respect thereto.

          5.3  Changes in Locations, Name, etc.  Such Grantor will not, except
               -------------------------------
upon 30 days' prior written notice to the Collateral Agent and delivery to the
Collateral Agent of (a) all additional executed financing statements and other
documents reasonably requested by the Collateral Agent to maintain the validity,
perfection and priority of the security interests provided for herein and (b) if
applicable, a written supplement to Schedule 5 showing any additional location
                                    ----------  
at which Inventory or Equipment shall be kept:

          (i) permit any of the Inventory or Equipment to be kept at a location
other than those listed on Schedule 5 (other than temporary transfers of
                           ----------
immaterial amounts of
<PAGE>
 
                                                                              15

     Inventory and Equipment for periods not exceeding three months for the
     limited purpose of repair in the ordinary course of business);

          (ii) change its jurisdiction of organization or the location of its
     chief executive office or sole place of business from that referred to in
     Section 4.3; or
     -----------

          (iii) change its name, identity or corporate structure to such an
     extent that any financing statement filed by the Collateral Agent in
     connection with this Agreement would become misleading.

          5.4  Notices.  Such Grantor will advise the Collateral Agent promptly,
               -------
in reasonable detail, of:

          (a) any Lien (other than security interests created hereby or Liens
permitted under the Financing Documents) on any of the Collateral which could
reasonably be expected to have a material adverse effect on the ability of the
Collateral Agent to exercise any of its remedies hereunder; and

          (b) of the occurrence of any other event which could reasonably be
expected to have a material adverse effect on the aggregate value of the
Collateral or on the security interests created hereby.

          5.5  Investment Property.  (a)  If such Grantor shall become entitled
               -------------------
to receive or shall receive any certificate (including any certificate
representing a stock dividend or a distribution in connection with any
reclassification, increase or reduction of capital or any certificate issued in
connection with any reorganization), option or rights in respect of the Capital
Stock in any Issuer, whether in addition to, in substitution of, as a conversion
of, or in exchange for, any shares of the Pledged Stock or Pledged Interests, as
the case may be, or otherwise in respect thereof, such Grantor shall accept the
same as the agent of the Collateral Agent and the Secured Parties, hold the same
in trust for the Collateral Agent and the Secured Parties and deliver the same
forthwith to the Collateral Agent in the exact form received, duly indorsed by
such Grantor to the Collateral Agent, if required, together with an undated
stock power or power of transfer, as the case may be, covering such certificate
duly executed in blank by such Grantor and with, if the Collateral Agent so
requests, signature guaranteed, to be held by the Collateral Agent, subject to
the terms hereof, as additional collateral security for the Obligations.  Any
sums paid upon or in respect of the Investment Property upon the liquidation or
dissolution of any Issuer shall be paid over to the Collateral Agent to be held
by it hereunder as additional collateral security for the Obligations, and in
case any distribution of capital shall be made on or in respect of the
Investment Property or any property shall be distributed upon or with respect to
the Investment Property pursuant to the recapitalization or reclassification of
the capital of any Issuer or pursuant to the reorganization thereof, the
property so distributed shall, unless otherwise subject to a perfected security
interest in favor of the Collateral Agent, be delivered to the Collateral Agent
to be held by it hereunder as additional collateral security for the
Obligations.  If any sums of money or property so paid or distributed in respect
of the Investment Property shall
<PAGE>
 
                                                                              16

be received by such Grantor, such Grantor shall, until such money or property is
paid or delivered to the Collateral Agent, hold such money or property in trust
for the Secured Parties, segregated from other funds of such Grantor, as
additional collateral security for the Obligations.

          (b)  Without the prior written consent of the Collateral Agent, such
Grantor will not (i) vote to enable, or take any other action to permit, any
Issuer to issue any stock, partnership interests or other equity securities of
any nature or to issue any other securities convertible into or granting the
right to purchase or exchange for any stock or other equity securities of any
nature of any Issuer, (ii) sell, assign, transfer, exchange, or otherwise
dispose of, or grant any option with respect to, the Investment Property or
Proceeds thereof, except pursuant to a transaction expressly permitted by the
Credit Agreement, (iii) create, incur or permit to exist any Lien or option in
favor of, or any claim of any Person with respect to, any of the Investment
Property or Proceeds thereof, or any interest therein, except for the security
interests created by this Agreement or (iv) enter into any agreement or
undertaking restricting the right or ability of such Grantor or the Collateral
Agent to sell, assign or transfer any of the Investment Property or Proceeds
thereof.

          (c)  In the case of each Grantor which is an Issuer, such Issuer
agrees that (i) it will be bound by the terms of this Agreement relating to the
Investment Property issued by it and will comply with such terms insofar as such
terms are applicable to it, (ii) it will notify the Collateral Agent promptly in
writing of the occurrence of any of the events described in Section 5.7(a) with
                                                            --------------
respect to the Investment Property issued by it and (iii) the terms of Sections
                                                                       --------
6.3(c) and 6.7 shall apply to it, mutatis mutandis, with respect to all actions
- ------     ---                    ------- --------
that may be required of it pursuant to Section 6.3(c) or 6.7 with respect to the
                                       --------------    ---
Investment Property issued by it.

                        SECTION 6.  REMEDIAL PROVISIONS

          6.1  Certain Matters Relating to Receivables.  (a)  The Collateral
               ---------------------------------------
Agent hereby authorizes each Grantor to collect such Grantor's Receivables and
the Collateral Agent may curtail or terminate said authority at any time after
the occurrence and during the continuance of an Event of Default.  If required
by the Collateral Agent at any time after the occurrence and during the
continuance of an Event of Default, any payments of Receivables, when collected
by any Grantor, (i) shall be forthwith (and, in any event, within two Business
Days) deposited by such Grantor in the exact form received, duly indorsed by
such Grantor to the Collateral Agent if required, in a Collateral Account
maintained under the sole dominion and control of the Collateral Agent, subject
to withdrawal by the Collateral Agent only as provided in Section 6.5, and (ii)
until so turned over, shall be held by such Grantor in trust for the Collateral
Agent, segregated from other funds of such Grantor.  Each such deposit of
Proceeds of Receivables shall be accompanied by a report identifying in
reasonable detail the nature and source of the payments included in the deposit.

          (b)  At the Collateral Agent's request, at any time after the
occurrence and during the continuance of an Event of Default, each Grantor shall
deliver to the Collateral Agent all
<PAGE>
 
                                                                              17

original and other documents evidencing, and relating to, the agreements and
transactions which gave rise to the Receivables.

          6.2  Communications with Obligors; Grantors Remain Liable.   (a)  The
               ----------------------------------------------------
Collateral Agent in its own name or in the name of others may at any time after
the occurrence and during the continuance of an Event of Default communicate
with obligors under the Receivables and parties to the Contracts to verify with
them to the Collateral Agent's satisfaction the existence, amount and terms of
any Receivables or Contracts.

          (b)  Upon the request of the Collateral Agent at any time after the
occurrence and during the continuance of an Event of Default, each Grantor shall
notify obligors on the Receivables and parties to the Contracts that the
Receivables and the Contracts have been assigned to the Collateral Agent for the
ratable benefit of the Secured Parties and that payments in respect thereof
shall be made directly to the Collateral Agent.

          (c)  Anything herein to the contrary notwithstanding, each Grantor
shall remain liable under each of the Receivables and Contracts to observe and
perform all the conditions and obligations to be observed and performed by it
thereunder, all in accordance with the terms of any agreement giving rise
thereto.  Neither the Collateral Agent nor any Secured Party shall have any
obligation or liability under any Receivable (or any agreement giving rise
thereto) or Contract by reason of or arising out of this Agreement or the
receipt by the Collateral Agent or any Secured Party of any payment relating
thereto, nor shall the Collateral Agent or any Secured Party be obligated in any
manner to perform any of the obligations of any Grantor under or pursuant to any
Receivable (or any agreement giving rise thereto) or Contract, to make any
payment, to make any inquiry as to the nature or the sufficiency of any payment
received by it or as to the sufficiency of any performance by any party
thereunder, to present or file any claim, to take any action to enforce any
performance or to collect the payment of any amounts which may have been
assigned to it or to which it may be entitled at any time or times.

          6.3  Investment Property.  (a)  Unless an Event of Default shall have
               -------------------
occurred and be continuing and the Collateral Agent shall have given notice to
the relevant Grantor of the Collateral Agent's intent to exercise its
corresponding rights pursuant to Section 6.3(b), each Grantor shall be permitted
                                 --------------
to receive all cash dividends paid in respect of the Pledged Stock, all cash
distributions paid in respect of the Pledged Interests and all payments made in
respect of the Pledged Notes, in each case paid in the normal course of business
of the relevant Issuer and consistent with past practice, to the extent
permitted in the Credit Agreement (and the Indenture, if any Securities have
been issued), and to exercise all voting and corporate rights with respect to
the Investment Property; provided, however, that no vote shall be cast or
                         --------  -------
corporate right exercised or other action taken which, in the Collateral Agent's
reasonable judgment, would impair the Collateral or which would be inconsistent
with or result in any violation of any provision of any Financing Document.

          (b)  If an Event of Default shall occur and be continuing and the
Collateral Agent shall give notice of its intent to exercise such rights to the
relevant Grantor or Grantors, (i) the
<PAGE>
 
                                                                              18

Collateral Agent shall have the right to receive any and all cash dividends,
distributions, payments or other Proceeds paid in respect of the Investment
Property and make application thereof to the Obligations in such order as the
Collateral Agent may determine, and (ii) any or all of the Investment Property
shall be registered in the name of the Collateral Agent or its nominee, and the
Collateral Agent or its nominee may thereafter exercise (x) all voting,
corporate and other rights pertaining to such Investment Property at any meeting
of shareholders or partners of the relevant Issuer or Issuers or otherwise and
(y) any and all rights of conversion, exchange and subscription and any other
rights, privileges or options pertaining to such Investment Property as if it
were the absolute owner thereof (including, without limitation, the right to
exchange at its discretion any and all of the Investment Property upon the
merger, consolidation, reorganization, recapitalization or other fundamental
change in the corporate or partnership structure of any Issuer, or upon the
exercise by any Grantor or the Collateral Agent of any right, privilege or
option pertaining to such Investment Property, and in connection therewith, the
right to deposit and deliver any and all of the Investment Property with any
committee, depositary, transfer agent, registrar or other designated agency upon
such terms and conditions as the Collateral Agent may determine), all without
liability except to account for property actually received by it, but the
Collateral Agent shall have no duty to any Grantor to exercise any such right,
privilege or option and shall not be responsible for any failure to do so or
delay in so doing.

          6.4  Proceeds to be Turned Over To Collateral Agent.  In addition to
               ----------------------------------------------
the rights of the Collateral Agent specified in Section 6.1 with respect to
                                                -----------
payments of Receivables, if an Event of Default shall occur and be continuing,
all Proceeds received by any Grantor consisting of cash, checks and other near-
cash items shall be held by such Grantor in trust for the Collateral Agent,
segregated from other funds of such Grantor, and shall, forthwith upon receipt
by such Grantor, be turned over to the Collateral Agent in the exact form
received by such Grantor (duly indorsed by such Grantor to the Collateral Agent,
if required).  All Proceeds received by the Collateral Agent hereunder shall be
held by the Collateral Agent in a Collateral Account maintained under its sole
dominion and control.  All Proceeds while held by the Collateral Agent in a
Collateral Account (or by such Grantor in trust for the Collateral Agent and the
Secured Parties) shall continue to be held as collateral security for all the
Obligations and shall not constitute payment thereof until applied as provided
in Section 6.5.
   -----------

          6.5  Application of Proceeds.  If an Event of Default shall have
               -----------------------
occurred and be continuing, at any time thereafter at the Collateral Agent's
election, the Collateral Agent may apply all or any part of Proceeds held in any
Collateral Account in payment of the Obligations in accordance with the
Collateral Agency and Intercreditor Agreement, and any part of such funds which
the Collateral Agent elects not so to apply and deems not required as collateral
security for the Obligations shall be paid over from time to time by the
Collateral Agent to the Borrower or to whomsoever may be lawfully entitled to
receive the same.  Any balance of such Proceeds remaining after the Obligations
shall have been paid in full and the Commitments shall have terminated shall be
paid over to the Borrower or to whomsoever may be lawfully entitled to receive
the same.
<PAGE>
 
                                                                              19

          6.6  Code and Other Remedies.  If an Event of Default shall occur and
               -----------------------
be continuing, the Collateral Agent, on behalf of the Secured Parties, may
exercise, in addition to all other rights and remedies granted to them in this
Agreement and in any other instrument or agreement securing, evidencing or
relating to the Obligations, all rights and remedies of a secured party under
the New York UCC or any other applicable law.  Without limiting the generality
of the foregoing, the Collateral Agent, without demand of performance or other
demand, presentment, protest, advertisement or notice of any kind (except any
notice required by law referred to below) to or upon any Grantor or any other
Person (all and each of which demands, defenses, advertisements and notices are
hereby waived), may in such circumstances forthwith collect, receive,
appropriate and realize upon the Collateral, or any part thereof, and/or may
forthwith sell, lease, assign, give option or options to purchase, or otherwise
dispose of and deliver the Collateral or any part thereof (or contract to do any
of the foregoing), in one or more parcels at public or private sale or sales, at
any exchange, broker's board or office of the Collateral Agent or any Secured
Party or elsewhere upon such terms and conditions as it may deem advisable and
at such prices as it may deem best, for cash or on credit or for future delivery
without assumption of any credit risk.  The Collateral Agent or any Secured
Party shall have the right upon any such public sale or sales, and, to the
extent permitted by law, upon any such private sale or sales, to purchase the
whole or any part of the Collateral so sold, free of any right or equity of
redemption in any Grantor, which right or equity is hereby waived and released.
Each Grantor further agrees, at the Collateral Agent's request, to assemble the
Collateral and make it available to the Collateral Agent at places which the
Collateral Agent shall reasonably select, whether at such Grantor's premises or
elsewhere.  The Collateral Agent shall apply the net proceeds of any action
taken by it pursuant to this Section 6.6, after deducting all reasonable costs
                             -----------
and expenses of every kind incurred in connection therewith or incidental to the
care or safekeeping of any of the Collateral or in any way relating to the
Collateral or the rights of the Collateral Agent and the Secured Parties
hereunder, including, without limitation, reasonable attorneys' fees and
disbursements, to the payment in whole or in part of the Obligations, in such
order as the Collateral Agent may elect, and only after such application and
after the payment by the Collateral Agent of any other amount required by any
provision of law, including, without limitation, Section 9-504(1)(c) of the New
York UCC, need the Collateral Agent account for the surplus, if any, to any
Grantor.  To the extent permitted by applicable law, each Grantor waives all
claims, damages and demands it may acquire against the Collateral Agent or any
Secured Party arising out of the exercise by them of any rights hereunder.  If
any notice of a proposed sale or other disposition of Collateral shall be
required by law, such notice shall be deemed reasonable and proper if given at
least 10 days before such sale or other disposition.

          6.7  Pledged Stock and Pledged Interests.  (a)  Each Grantor
               -----------------------------------
recognizes that the Collateral Agent may be compelled to resort to one or more
private sales of the Pledged Stock or Pledged Interest to a restricted group of
purchasers which will be obliged to agree, among other things, to acquire such
securities for their own account for investment and not with a view to the
distribution or resale thereof.  Each Grantor acknowledges and agrees that any
such private sale may result in prices and other terms less favorable than if
such sale were a public sale and, notwithstanding such circumstances, agrees
that any such private sale shall be deemed to have been made in a commercially
reasonable manner.  The Collateral Agent shall be under no
<PAGE>
 
                                                                              20

obligation to delay a sale of any of the Pledged Stock or Pledged Interest, as
the case may be, for the period of time necessary to permit the Issuer thereof
to register such securities for public sale under the Securities Act, or under
applicable state securities laws, even if such Issuer would agree to do so.

          (b)  Each Grantor agrees to use its best efforts to do or cause to be
done all such other acts as may be necessary to make such sale or sales of all
or any portion of the Pledged Stock or Pledged Interest, as the case may be,
pursuant to this Section 6.7 valid and binding and in compliance with any and
                 -----------
all other applicable Requirements of Law.  Each Grantor further agrees that a
breach of any of the covenants contained in this Section 6.7 will cause
                                                 -----------
irreparable injury to the Collateral Agent and the Secured Parties, that the
Collateral Agent and the Secured Parties have no adequate remedy at law in
respect of such breach and, as a consequence, that each and every covenant
contained in this Section 6.7 shall be specifically enforceable against such
                  -----------
Grantor, and such Grantor hereby waives and agrees not to assert any defenses
against an action for specific performance of such covenants except for a
defense that no Event of Default has occurred under the Financing Documents.

          6.8  Waiver; Deficiency.  Each Grantor waives and agrees not to assert
               ------------------
any rights or privileges which it may acquire under Section 9-112 of the New
York UCC.  Each Grantor shall remain liable for any deficiency if the proceeds
of any sale or other disposition of the Collateral are insufficient to pay its
Obligations and the reasonable fees and disbursements of any attorneys employed
by the Collateral Agent or any Secured Party to collect such deficiency.

                        SECTION 7.  THE COLLATERAL AGENT

          7.1  Collateral Agent's Appointment as Attorney-in-Fact, etc.  (a)
               --------------------------------------------------------
Each Grantor hereby irrevocably constitutes and appoints the Collateral Agent
and any officer or agent thereof, with full power of substitution, as its true
and lawful attorney-in-fact with full irrevocable power and authority in the
place and stead of such Grantor and in the name of such Grantor or in its own
name, for the purpose of carrying out the terms of this Agreement, to take any
and all appropriate action and to execute any and all documents and instruments
which may be necessary or desirable to accomplish the purposes of this
Agreement, and, without limiting the generality of the foregoing, each Grantor
hereby gives the Collateral Agent the power and right, on behalf of such
Grantor, without notice to or assent by such Grantor, to do any or all of the
following:

          (i)  in the name of such Grantor or its own name, or otherwise, take
     possession of and indorse and collect any checks, drafts, notes,
     acceptances or other instruments for the payment of moneys due under any
     Receivable or Contract or with respect to any other Collateral and file any
     claim or take any other action or proceeding in any court of law or equity
     or otherwise deemed appropriate by the Collateral Agent for the purpose of
     collecting any and all such moneys due under any Receivable or Contract or
     with respect to any other Collateral whenever payable;
<PAGE>
 
                                                                              21

          (ii)  pay or discharge taxes and Liens levied or placed on or
     threatened against the Collateral, effect any repairs or any insurance
     called for by the terms of this Agreement and pay all or any part of the
     premiums therefor and the costs thereof;

          (iii)  execute, in connection with any sale provided for in Section
                                                                      -------
     6.6 or 6.7, any indorsements, assignments or other instruments of
     ---    ---
     conveyance or transfer with respect to the Collateral; and

          (iv) (1) direct any party liable for any payment under any of the
     Collateral to make payment of any and all moneys due or to become due
     thereunder directly to the Collateral Agent or as the Collateral Agent
     shall direct; (2) ask or demand for, collect, and receive payment of and
     receipt for, any and all moneys, claims and other amounts due or to become
     due at any time in respect of or arising out of any Collateral; (3) sign
     and indorse any invoices, freight or express bills, bills of lading,
     storage or warehouse receipts, drafts against debtors, assignments,
     verifications, notices and other documents in connection with any of the
     Collateral; (4) commence and prosecute any suits, actions or proceedings at
     law or in equity in any court of competent jurisdiction to collect the
     Collateral or any portion thereof and to enforce any other right in respect
     of any Collateral; (5) defend any suit, action or proceeding brought
     against such Grantor with respect to any Collateral; (6) settle, compromise
     or adjust any such suit, action or proceeding and, in connection therewith,
     give such discharges or releases as the Collateral Agent may deem
     appropriate; and (7) generally, sell, transfer, pledge and make any
     agreement with respect to or otherwise deal with any of the Collateral as
     fully and completely as though the Collateral Agent were the absolute owner
     thereof for all purposes, and do, at the Collateral Agent's option and such
     Grantor's expense, at any time, or from time to time, all acts and things
     which the Collateral Agent deems necessary to protect, preserve or realize
     upon the Collateral and the Collateral Agent's and the Secured Parties'
     security interests therein and to effect the intent of this Agreement, all
     as fully and effectively as such Grantor might do.

          Anything in this Section 7.1(a) to the contrary notwithstanding, the
                           --------------
Collateral Agent agrees that it will not exercise any rights under the power of
attorney provided for in this Section 7.1(a) unless an Event of Default shall
                              --------------
have occurred and be continuing.

          (b)  If an Event of Default shall have occurred and be continuing, if
any Grantor fails to perform or comply with any of its agreements contained
herein, the Collateral Agent, at its option, but without any obligation so to
do, may perform or comply, or otherwise cause performance or compliance, with
such agreement.

          (c)  The expenses of the Collateral Agent incurred in connection with
actions undertaken as provided in this Section 7.1, together with interest
                                       -----------
thereon at a rate per annum equal to the highest rate per annum at which
interest would then be payable on any category of past due Base Rate Loans under
the Credit Agreement, from the date of payment by the Collateral Agent to the
date reimbursed by the relevant Grantor, shall be payable by such Grantor to the
Collateral Agent on demand.
<PAGE>
 
                                                                              22

          (d)  Each Grantor hereby ratifies all that said attorneys shall
lawfully do or cause to be done by virtue hereof.  All powers, authorizations
and agencies contained in this Agreement are coupled with an interest and are
irrevocable until this Agreement is terminated and the security interests
created hereby are released.

          7.2  Duty of Collateral Agent.  The Collateral Agent's sole duty with
               ------------------------
respect to the custody, safekeeping and physical preservation of the Collateral
in its possession, under Section 9-207 of the New York UCC or otherwise, shall
be to deal with it with the same degree of care as the Collateral Agent deals
with similar property for its own account.  Neither the Collateral Agent, any
Secured Party nor any of their respective officers, directors, employees or
agents shall be liable for failure to demand, collect or realize upon any of the
Collateral or for any delay in doing so or shall be under any obligation to sell
or otherwise dispose of any Collateral upon the request of any Grantor or any
other Person or to take any other action whatsoever with regard to the
Collateral or any part thereof.  The powers conferred on the Collateral Agent
and the Secured Parties hereunder are solely to protect the Collateral Agent's
and the Secured Parties' interests in the Collateral and shall not impose any
duty upon the Collateral Agent or any Secured Party to exercise any such powers.
The Collateral Agent and the Secured Parties shall be accountable only for
amounts that they actually receive as a result of the exercise of such powers,
and neither they nor any of their officers, directors, employees or agents shall
be responsible to any Grantor for any act or failure to act hereunder, except
for (i) their own gross negligence or willful misconduct or (ii) breach of their
obligations under this Agreement.

          7.3  Execution of Financing Statements.  Pursuant to Section 9-402 of
               ---------------------------------
the New York UCC and any other applicable law, each Grantor authorizes the
Collateral Agent to file or record financing statements and other filing or
recording documents or instruments with respect to the Collateral without the
signature of such Grantor in such form and in such offices as the Collateral
Agent determines appropriate to perfect the security interests of the Collateral
Agent under this Agreement.  A photographic or other reproduction of this
Agreement shall be sufficient as a financing statement or other filing or
recording document or instrument for filing or recording in any jurisdiction.

          7.4  Authority of Collateral Agent.  Each Grantor and each Secured
               -----------------------------
Party by accepting the benefits of this Agreement acknowledges that the rights
and responsibilities of the Collateral Agent under this Agreement with respect
to any action taken by the Collateral Agent or the exercise or non-exercise by
the Collateral Agent of any option, voting right, request, judgment or other
right or remedy provided for herein or resulting or arising out of this
Agreement shall, as between the Collateral Agent and the Secured Parties, be
governed by the Financing Documents and by such other agreements with respect
thereto as may exist from time to time among them, but, as between the
Collateral Agent and the Grantors, the Collateral Agent shall be conclusively
presumed to be acting as agent for the Secured Parties with full and valid
authority so to act or refrain from acting, and no Grantor shall be under any
obligation, or entitlement, to make any inquiry respecting such authority.
<PAGE>
 
                                                                              23

                           SECTION 8.  MISCELLANEOUS

          8.1  Amendments in Writing.  None of the terms or provisions of this
               ---------------------
Agreement may be waived, amended, supplemented or otherwise modified except in
writing and in accordance with the Collateral Agency and Intercreditor
Agreement.

          8.2  Notices.  All notices and other communications to any party
               -------
hereto shall be in writing or by facsimile and addressed, delivered or
transmitted to such party at its address or facsimile number set forth on
Schedule 1 or at such other address or facsimile number as may be designated by
such party in a notice to the other parties.

          8.3  No Waiver by Course of Conduct; Cumulative Remedies.  Neither the
               ---------------------------------------------------
Collateral Agent nor any Secured Party shall by any act (except by a written
instrument pursuant to Section 8.1), delay, indulgence, omission or otherwise be
                       ----------- 
deemed to have waived any right or remedy hereunder or to have acquiesced in any
Default or Event of Default.  No failure to exercise, nor any delay in
exercising, on the part of the Collateral Agent or any Secured Party, any right,
power or privilege hereunder shall operate as a waiver thereof.  No single or
partial exercise of any right, power or privilege hereunder shall preclude any
other or further exercise thereof or the exercise of any other right, power or
privilege.  A waiver by the Collateral Agent or any Secured Party of any right
or remedy hereunder on any one occasion shall not be construed as a bar to any
right or remedy which the Collateral Agent or such Secured Party would otherwise
have on any future occasion.  The rights and remedies herein provided are
cumulative, may be exercised singly or concurrently and are not exclusive of any
other rights or remedies provided by law.

          8.4  Enforcement Expenses; Indemnification.  (a)  Each Guarantor
               -------------------------------------
agrees to pay or reimburse each Secured Party and the Collateral Agent for all
its costs and expenses incurred in collecting against such Guarantor under the
guarantee contained in Section 2 or otherwise enforcing or preserving any rights
                       --------- 
under the Loan Documents to which such Guarantor is a party, including, without
limitation, the fees and disbursements of counsel to each Secured Party and of
counsel to the Collateral Agent.

          (b)  Each Guarantor agrees to pay, and to save the Collateral Agent
and the Secured Parties harmless from, any and all liabilities with respect to,
or resulting from any delay in paying, any and all stamp, excise, sales or other
taxes which may be payable or determined to be payable with respect to any of
the Collateral or in connection with any of the transactions contemplated by
this Agreement.

          (c)  Each Guarantor agrees to pay, and to save the Collateral Agent
and the Secured Parties harmless from, any and all liabilities, obligations,
losses, damages, penalties, actions, judgments, suits, costs, expenses or
disbursements of any kind or nature whatsoever with respect to the execution,
delivery, enforcement, performance and administration of this Agreement to the
extent the Borrower would be required to do so pursuant to Section 11.4 of the
Credit Agreement.
<PAGE>
 
                                                                              24

          (d)  The agreements in this Section 8.4 shall survive repayment of the
                                      -----------
Obligations and all other amounts payable under the Loan Documents.

          8.5  Successors and Assigns.  This Agreement shall be binding upon the
               ----------------------
successors and assigns of each Grantor and shall inure to the benefit of the
Collateral Agent and the Secured Parties and their successors and assigns;
provided that no Grantor may assign, transfer or delegate any of its rights or
- -------- 
obligations under this Agreement without the prior written consent of the
Collateral Agent.

          8.6  Set-Off.  Each Grantor hereby irrevocably authorizes the
               -------  
Collateral Agent and each Secured Party at any time and from time to time (i)
upon the occurrence of an Event of Default of the kind described in clauses (a)
or (b) of Section 9.1.6 of the Credit Agreement, (ii) upon the occurrence of any
Default of the kind described in clauses (c) or (d) of Section 9.1.6 of the
Credit Agreement with respect to the Borrower, or (iii) upon the occurrence and
continuance beyond the applicable grace period, if any, of any other Event of
Default and with the consent of the Required Secured Parties, without notice to
such Grantor or any other Grantor, any such notice being expressly waived by
each Grantor, to set-off and appropriate and apply 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 the Collateral Agent or such Secured Party to or for the credit
or the account of such Grantor, or any part thereof in such amounts as the
Collateral Agent or such Secured Party may elect, against and on account of the
obligations and liabilities of such Grantor to the Collateral Agent or such
Secured Party hereunder and claims of every nature and description of the
Collateral Agent or such Secured Party against such Grantor, in any currency,
whether arising hereunder, under the Credit Agreement, any other Financing
Document or otherwise, as the Collateral Agent or such Secured Party may elect,
whether or not the Collateral Agent or any Secured Party has made any demand for
payment and although such obligations, liabilities and claims may be contingent
or unmatured.  The Collateral Agent and each Secured Party shall notify such
Grantor promptly of any such set-off and the application made by the Collateral
Agent or such Secured Party of the proceeds thereof, provided that the failure
                                                     --------
to give such notice shall not affect the validity of such set-off and
application.  The rights of the Collateral Agent and each Secured Party under
this Section 8.6 are in addition to other rights and remedies (including,
     -----------
without limitation, other rights of set-off) which the Collateral Agent or such
Secured Party may have.

          8.7  Counterparts.  This Agreement may be executed by one or more of
               ------------
the parties to this Agreement on any number of separate counterparts (including
by telecopy), and all of said counterparts taken together shall be deemed to
constitute one and the same instrument.

          8.8  Severability.  Any provision of this Agreement which 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.
<PAGE>
 
                                                                              25

          8.9  Section Headings.  The Section headings used in this Agreement
               ----------------
are for convenience of reference only and are not to affect the construction
hereof or be taken into consideration in the interpretation hereof.

          8.10  Integration.  The Security Documents represent the agreement of
                -----------
the Grantors, the Collateral Agent and the Secured Parties with respect to the
subject matter hereof and thereof, and there are no promises, undertakings,
representations or warranties by the Collateral Agent or any Secured Party
relative to subject matter hereof and thereof not expressly set forth or
referred to in the Security Documents.  The Security Documents supersede any and
all prior agreements and understandings, oral or written, relative or with
respect to the subject matter hereof, and there are no promises, undertakings,
representations or warranties by the Collateral Agent or any Secured Party
relative to the subject matter hereof not expressly set forth or referred to
herein or in the other Security Documents.

          8.11  GOVERNING LAW.  THIS AGREEMENT SHALL BE GOVERNED BY, AND
                ------------- 
CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

          8.12  Submission To Jurisdiction; Waivers.  Each Grantor (and, with
                -----------------------------------
respect to paragraph (e) below only, the Collateral Agent and each of the
Secured Parties) hereby irrevocably and unconditionally:

          (a)  submits for itself and its property in any legal action or
     proceeding relating to the 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 New York, the
     courts of the United States of America for the Southern District of New
     York, and appellate courts from any thereof;

          (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 such
     Grantor at its address referred to in Section 8.2 or at such other address
                                           -----------
     of which the Collateral Agent 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
<PAGE>
 
                                                                              26

          (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.

          8.13  Acknowledgements.  Each Grantor hereby acknowledges that:
                ---------------- 

          (a)  it has been advised by counsel in the negotiation, execution and
     delivery of the Security Documents to which it is a party;

          (b)  neither the Collateral Agent nor any Secured Party has any
     fiduciary relationship with or duty to any Grantor arising out of or in
     connection with any Security Documents, and the relationship between the
     Grantors, on the one hand, and the Collateral Agent and Secured Parties, on
     the other hand, in connection herewith or therewith is solely that of
     debtor and creditor; and

          (c)  no joint venture is created by any Security Document or otherwise
     exists by virtue of the transactions contemplated hereby among the Secured
     Parties or among the Grantors and the Secured Parties.

          8.14  Releases.  (a)  At such time as the Obligations shall have been
                --------
paid in full and the Commitments shall have been terminated, the Collateral
shall automatically be released from the Liens created hereby, and this
Agreement and all obligations (other than those expressly stated to survive such
termination) of the Collateral Agent and each Grantor hereunder shall terminate,
all without delivery of any instrument or performance of any act by any party,
and all rights to the Collateral shall revert to the Grantors.  At the request
and sole expense of any Grantor following any such termination, the Collateral
Agent shall deliver to such Grantor any Collateral held by the Collateral Agent
hereunder, and execute and deliver to such Grantor such documents as such
Grantor shall reasonably request to evidence such termination.

          (b)  If any of the Collateral shall be sold, transferred or otherwise
disposed of by any Grantor in a transaction permitted by the Credit Agreement
(and the Indenture, if any Securities have been issued), then the Collateral
Agent, at the request and reasonable and sole expense of such Grantor, shall
execute and deliver to such Grantor all releases or other documents reasonably
necessary or desirable for the release of the Liens created hereby on such
Collateral.  At the request and reasonable and sole expense of the Borrower, a
Guarantor shall be released from its obligations hereunder in the event that all
the Capital Stock of such Guarantor shall be sold, transferred or otherwise
disposed of in a transaction permitted by the Credit Agreement (and the
Indenture, if any Securities have been issued); provided that the Borrower shall
                                                --------
have delivered to the Collateral Agent, at least ten Business Days prior to the
date of the proposed release, a written request for release identifying the
relevant Guarantor and the terms of the sale or other disposition in reasonable
detail, including the price thereof and any expenses in connection therewith,
together with a certification by the Borrower stating that such transaction is
in compliance with the Loan Documents.
<PAGE>
 
                                                                              27

          8.15  WAIVER OF JURY TRIAL.  EACH PARTY HERETO HEREBY IRREVOCABLY AND
                --------------------
UNCONDITIONALLY WAIVES TRIAL BY JURY IN ANY LEGAL ACTION OR PROCEEDING RELATING
TO THIS AGREEMENT OR ANY OTHER FINANCING DOCUMENT AND FOR ANY COUNTERCLAIM
THEREIN.
<PAGE>
 
          IN WITNESS WHEREOF, each of the undersigned has caused this Agreement
to be duly executed and delivered as of the date first above written.


                                    EDISON MISSION HOLDINGS CO., Borrower


                                    By:
                                       -----------------------------------
                                         Name:
                                         Title:


                                    EDISON MISSION FINANCE CO., Guarantor


                                    By:
                                       -----------------------------------
                                         Name:
                                         Title:


                                    HOMER CITY PROPERTY HOLDINGS, INC.,
                                    Guarantor


                                    By:
                                       -----------------------------------
                                         Name:
                                         Title:


                                    CHESTNUT RIDGE ENERGY CO., Guarantor


                                    By:
                                       -----------------------------------
                                         Name:
                                         Title:
<PAGE>
 
                                    MISSION ENERGY WESTSIDE, INC., Guarantor


                                    By: ____________________________________
                                         Name:
                                         Title:


                                    EME HOMER CITY GENERATION L.P.,
                                    Guarantor 


                                    By: Mission Energy Westside, Inc., its
                                    General Partner


                                    By:_____________________________________
                                         Name:
                                         Title:


                                    EDISON MISSION ENERGY, Grantor


                                    By: ____________________________________
                                         Name:
                                         Title:


          Acknowledged and Agreed as of the
            date hereof:

          UNITES STATES TRUST COMPANY OF NEW YORK, as Collateral Agent


          By: _____________________________           

              Name:
              Title
                               

<PAGE>
 
                                                                      Schedule 1
                                                                      ----------


                                NOTICE ADDRESSES

<PAGE>
 
                                                                      Schedule 2
                                                                      ----------


                      DESCRIPTION OF INVESTMENT PROPERTY


          Pledged Stock:


              Issuer    Class of Stock    Stock Certificate No.    No. of Shares


          Pledged Interests:


              Issuer    Class of Stock    Certificate No.      Amount of
                                                               Interest


          Pledged Notes:
               Issuer    Payee            Date                 Principal
                                                               Amount
<PAGE>
 
                                                                      Schedule 3
                                                                      ----------



                           FILINGS AND OTHER ACTIONS

                     REQUIRED TO PERFECT SECURITY INTERESTS

                        Uniform Commercial Code Filings
                        -------------------------------  

         [List each office where a financing statement is to be filed]


                     Actions with respect to Pledged Stock*
                     -------------------------------------

          *If the interest of a Grantor in Pledged Stock appears on the books of
a financial intermediary, a control agreement as described in Section 8-106 of
the New York UCC will be required.
<PAGE>
 
                                                                      Schedule 4
                                                                      ----------



      LOCATION OF JURISDICTION OF ORGANIZATION AND CHIEF EXECUTIVE OFFICE


                    Grantor          Location
                    -------          -------- 
<PAGE>
 
                                                                      Schedule 5
                                                                      ----------



                      LOCATION OF INVENTORY AND EQUIPMENT


                    Grantor          Locations
                    -------          ---------
<PAGE>
 
                                                                      Schedule 6
                                                                      ----------



                               CERTAIN CONTRACTS

<PAGE>
 
                                                                   EXHIBIT 10.57
                                                                  EXECUTION COPY
                 COLLATERAL AGENCY AND INTERCREDITOR AGREEMENT


                                     among


                          EDISON MISSION HOLDINGS CO.,
                          EDISON MISSION FINANCE CO.,
                      HOMER CITY PROPERTY HOLDINGS, INC.,
                           CHESTNUT RIDGE ENERGY CO.,
                         MISSION ENERGY WESTSIDE, INC.,
                         EME HOMER CITY GENERATION L.P.


     The SECURED PARTIES' REPRESENTATIVES From Time to Time Parties Hereto

                               CITICORP USA, INC,
                            as Administrative Agent

                                      and

                    UNITED STATES TRUST COMPANY OF NEW YORK,
                              as Collateral Agent


                           Dated as of March 18, 1999
<PAGE>
 
                               TABLE OF CONTENTS
<TABLE>
                                                                                                                Page
<S>                                                                                                         <C>
SECTION 1.DEFINITIONS.....................................................................................        2
     1.1  Defined Terms...................................................................................        2
     1.2  Other Definitional Provisions...................................................................        6
 
SECTION 2.THE COLLATERAL AGENT............................................................................        6
     2.1  Appointment.....................................................................................        6
     2.2  Exculpatory Provisions..........................................................................        7
     2.3  Delegation of Duties............................................................................        7
     2.4  Reliance by Collateral Agent....................................................................        8
     2.5  Limitations on Duties of Collateral Agent.......................................................        8
     2.6  Resignation and Removal of the Collateral Agent.................................................        9
     2.7  Treatment of Secured Parties' Representative by Collateral Agent................................       10
     2.8  Appointment of Separate or Co-Collateral Agent..................................................       10
     2.9  Successor Collateral Agent by Merger, Consolidation, Etc........................................       11
     2.10  Eligibility of Collateral Agent................................................................       11
     2.11  Notices, Etc., Under Collateral, Etc...........................................................       12
 
SECTION 3.SENIOR DEBT.....................................................................................       12
     3.1  Obligations Pari Passu..........................................................................       12
     3.2  Senior Debt.....................................................................................       12
 
SECTION 4.DEFAULT PERIOD..................................................................................       13
     4.1  Default and Acceleration Notices................................................................       13
     4.2  General Authority of the Collateral Agent over the Collateral...................................       13
     4.3  Right to Initiate Judicial Proceedings; Appointment of Receiver.................................       14
     4.4  Exercise of Powers; Instructions of Required Secured Parties....................................       14
     4.5  Remedies Not Exclusive..........................................................................       15
     4.6  Waiver and Estoppel.............................................................................       15
     4.7  Limitation on Collateral Agent's Duty in Respect of Collateral..................................       16
     4.8  Limitation by Law...............................................................................       16
     4.9  Consent to Relief from Automatic Stay...........................................................       16
 
SECTION 5.PAYMENTS........................................................................................       17
     5.1  Pro Rata Sharing................................................................................       17
     5.2  Disbursement of Monies Collected after Acceleration                                                    17
 
SECTION 6.AGREEMENTS WITH COLLATERAL AGENT................................................................       17
     6.1  Delivery of Financing Documents.................................................................       17
     6.2  Information as to Secured Parties' Representatives..............................................       18
     6.3  Certificate of Secured Parties' Representative..................................................       18
     6.4  Compensation and Expenses.......................................................................       18
</TABLE>
                                       i-
<PAGE>
 
<TABLE>                                                                        
<CAPTION>
                                                                                                                Page
<S>                                                                                                         <C>
     6.5  Stamp and Other Similar Taxes...................................................................      18
     6.6  Filing Fees, Excise Taxes, Etc..................................................................      18
     6.7  Indemnification.................................................................................      19
     6.8  Further Assurances..............................................................................      19
     6.9  Payment by Collateral Agent, Etc................................................................      19
     7.1  Representations and Warranties..................................................................      20
 
SECTION 8.CERTAIN AGREEMENTS OF THE SECURED PARTIES.......................................................      20
     8.1  Turnover of Collateral..........................................................................      20
     8.2  No Bankruptcy Filings...........................................................................      21
     8.3  No Loans; No Liens..............................................................................      21
     8.4  Security Interests..............................................................................      21
     8.5  Set-offs........................................................................................      21
     8.6  Intercreditor Agreement Regarding Amendment of Financing Documents..............................      21
     8.7  Beneficiaries...................................................................................      22
     8.8  Additional Collateral...........................................................................      22
     8.9  Purchase of Collateral..........................................................................      22
 
SECTION 9.MISCELLANEOUS...................................................................................      23
     9.1  No Individual Action............................................................................      23
     9.2  Notices.........................................................................................      23
     9.3  No Waivers......................................................................................      23
     9.4  Amendments, Supplements and Waivers.............................................................      23
     9.5  Headings........................................................................................      24
     9.6  Severability....................................................................................      24
     9.7  Successors and Assigns..........................................................................      24
     9.8  GOVERNING LAW...................................................................................      24
     9.9  Counterparts....................................................................................      24
     9.10  SUBMISSION TO JURISDICTION; WAIVERS............................................................      24
     9.11  Termination....................................................................................      25
     9.12  Acknowledgments................................................................................      26
</TABLE>

Schedule 1 - Addresses for Notices

Exhibit A - Form of Senior Debt Supplement

                                      ii-
<PAGE>
 
          COLLATERAL AGENCY AND INTERCREDITOR AGREEMENT, dated as of March 18,
1999, among EDISON MISSION HOLDINGS CO., a California corporation (the
"Borrower"), EDISON MISSION FINANCE CO., a California corporation ("Edison
 --------                                                           ------
Mission Finance"), HOMER CITY PROPERTY HOLDINGS, INC., a California corporation
- ---------------
("Homer City Holdings"), CHESTNUT RIDGE ENERGY CO., a California corporation
  -------------------
("Chestnut Ridge"), MISSION ENERGY WESTSIDE, INC., a California corporation
  --------------
("MEW"), EME HOMER CITY GENERATION L.P., a Pennsylvania limited partnership
  ---
("EME Homer City"; and, together with the Borrower, Edison Mission Finance,
  --------------
Homer City Holdings, Chestnut Ridge and MEW, the "Loan Parties"), the SECURED
                                                  ------------
PARTIES' REPRESENTATIVES (as defined below) from time to time parties hereto,
CITICORP USA, INC., as Administrative Agent (as defined below), and UNITED
STATES TRUST COMPANY OF NEW YORK, as Collateral Agent (as defined below).

                                    RECITALS

          A.  The Borrower has entered into a Credit Agreement, dated as of
March 18, 1999 (as the same may be amended, supplemented or otherwise modified
from time to time, the "Credit Agreement"), with certain financial institutions
                        ----------------
(collectively, the "Lenders") and Citicorp USA, Inc., as administrative agent
                    -------
for the Lenders (in such capacity, the "Administrative Agent").
                                        --------------------

          B.  Pursuant to the Credit Agreement, the Lenders have severally
agreed to make Loans (as defined below) to the Borrower upon the terms and
subject to the conditions set forth therein.

          C.  The Borrower will use the proceeds of the Loans under the Credit
Agreement to make valuable transfers to one or more of the other Loan Parties in
connection with the acquisition of the Homer City Electric Generating Station
and certain facilities and other assets associated therewith and ancillary
thereto (the "Generating Station"), certain capital expenditures related to the
              ------------------
Generating Station and general working capital purposes.

          D.  Under Section 8.2.1(e) of the Credit Agreement, the Borrower is
permitted to incur certain indebtedness for the purpose of refinancing the Loans
and other indebtedness of the Borrower ("Refinancing Indebtedness"); under
                                         ------------------------
Section 8.2.1(d)(i) of the Credit Agreement, the Loan Parties are permitted to
incur certain indebtedness in the form of reimbursement obligations relating to
letters of credit, surety bonds and performance bonds used by the Loan Parties
in the ordinary course of their business ("Ordinary Course Letter of Credit
                                           --------------------------------
Indebtedness"); under Section 8.2.1(d)(ii) of the Credit Agreement, the Borrower
- ------------
is permitted to incur certain indebtedness in the form of reimbursement
obligations relating to Debt Service Reserve Letters of Credit (as defined
below) ("DSR Letter of Credit Indebtedness"); under Section 8.2.1 of the
         ---------------------------------
Credit Agreement, the Borrower is permitted to incur certain additional
indebtedness ("Additional Indebtedness"); and, under Section 8.2.1(b) of the
               -----------------------
Credit Agreement, the Borrower is permitted to incur certain indebtedness under
Interest Rate Hedging Transactions (as defined below) entered into with respect
to the Loans ("Swap Indebtedness").
               -----------------

          E.  In order to simplify administration of the common collateral
securing the Borrower's indebtedness and to provide for the orderly enforcement
of their respective rights, the
<PAGE>
 
                                                                               2
Administrative Agent and the other Secured Parties' Representatives desire to
appoint the Collateral Agent to serve as their common representative, to be the
beneficiary under any guarantee intended to benefit the Secured Parties (as
defined below) and to hold the liens created, or to be created, under the
Financing Documents (as defined below).

          F.  The Collateral Agent is willing to serve as a common collateral
agent for all Secured Parties pursuant to this Agreement.

          G.  The Borrower is a member of an affiliated group of companies that
includes each other Loan Party.  The Borrower and the other Loan Parties are
engaged in related businesses, and each Loan Party will derive substantial
direct and indirect benefit from the making of the Loans and the incurrence of
any Refinancing Indebtedness, Ordinary Course Letter of Credit Indebtedness, DSR
Letter of Credit Indebtedness, Additional Indebtedness or Swap Indebtedness.

          H.  It is a condition precedent to the obligation of the Lenders to
make their respective Loans to the Borrower under the Credit Agreement that the
Loan Parties shall have executed and delivered this Agreement to the Collateral
Agent for the benefit of the Secured Parties.

          NOW, THEREFORE, in consideration of the foregoing premises and for
other good and valuable consideration, the receipt of which is hereby
acknowledged, each of the parties hereto hereby agrees as follows:

                                   SECTION 1.
                                  DEFINITIONS

          SECTION  1.1  Defined Terms.  (a)  Unless otherwise defined herein,
                        -------------
terms defined in the Security Deposit Agreement (as defined below) and used
herein shall have the meanings given to them in the Security Deposit Agreement.

          (b)  The following terms shall have the meanings indicated:

          "Acceleration Notice" means a written notice delivered to the
           -------------------
     Collateral Agent during a Default Period (a) in the event such Default
     Period arises out of an Event of Default under Article IX of the Credit
     Agreement, by the Administrative Agent, which notice states that the
     aggregate principal amount of the Loans thereunder has become due and
     payable prior to the stated maturity thereof, or (b) in the event such
     Default Period arises out of an Event of Default under the Financing
     Documents relating to any other Senior Debt, by the Secured Parties'
     Representative for such Senior Debt, which notice states that the principal
     amount of such Senior Debt has become due and payable prior to the stated
     maturity thereof.
<PAGE>
 
                                                                               3

          "Additional Indebtedness" has the meaning specified in the recitals.
           -----------------------                                   --------

          "Administrative Agent" has the meaning specified in the recitals.
           --------------------                                   --------

          "Agreement" means this Collateral Agency and Intercreditor Agreement,
           ---------
     dated as of March 18, 1999, among the Loan Parties, the Administrative
     Agent, the other Secured Parties' Representatives from time to time parties
     hereto and the Collateral Agent.  

          "Borrower" has the meaning specified in the recitals.
           --------

          "Chestnut Ridge" has the meaning specified in the preamble.
           --------------

          "Collateral" means, collectively, (i) the Security Deposit Agreement
           ----------
     Collateral, (ii) the Guarantee and Collateral Agreement Collateral and
     (iii) the Mortgaged Property.

          "Collateral Agent" means United States Trust Company of New York, as
           ----------------
     collateral agent for the Secured Parties, together with its successors and
     assigns, and any successor collateral agent appointed under Section 2
     hereof to act on behalf of the Secured Parties with respect to the
     Collateral.

          "Commitments" has the meaning specified in the Credit Agreement.
           -----------

          "Credit Agreement" has the meaning specified in the recitals.
           ----------------                                   --------

          "Cure Notice" means a written notification delivered to the Borrower
           -----------
     and the Collateral Agent by one or more Secured Parties' Representatives
     acting on behalf of the Required Secured Parties stating that an Event of
     Default that was the subject of a Default Notice is no longer continuing.

          "Default" means any Event of Default or any condition, occurrence or
           -------
     event which, after notice of lapse or time or both, would constitute an
     Event of Default.

          "Default Notice" means a written notification delivered to the
           --------------
     Collateral Agent by the Borrower or any Secured Parties' Representative
     stating that an Event of Default has occurred and is continuing.  A Default
     Notice shall be deemed to have been delivered if a voluntary petition of
     bankruptcy has been filed under Title 11 of the United States Code (or any
     similar action has been taken under the laws of any other jurisdiction)
     with respect to the Borrower.

          "Default Period" means the period commencing on the date the
           --------------
     Collateral Agent receives a Default Notice and ending on the date the
     Collateral Agent receives a Cure Notice or a notice of cancellation
     pursuant to Section 4.1(b).
<PAGE>
 
                                                                               4

          "DSR Letter of Credit Indebtedness" has the meaning specified in the
           ---------------------------------
    recitals.
    --------

          "Edison Mission Finance" has the meaning specified in the preamble.
           ----------------------                                   --------

          "EME Homer City" has the meaning specified in the preamble.
           --------------                                   --------

          "Event of Default" means an "Event of Default" under the Credit
           ----------------
     Agreement or any other Financing Document.

          "Financing Documents" means the Loan Documents and each indenture,
           -------------------
     loan agreement, underwriting agreement, security purchase agreement or
     other document entered into in connection with any Senior Debt.

          "Generating Station" has the meaning specified in the recitals.
           ------------------                                   --------

          "Guarantee and Collateral Agreement" means the Guarantee and
           ----------------------------------
     Collateral Agreement, dated as of March 18, 1999, made by the Loan Parties
     in favor of the Collateral Agent.

          "Guarantee and Collateral Agreement Collateral" means "Collateral" as
           ---------------------------------------------
     defined in the Guarantee and Collateral Agreement.

          "Homer City Holdings"  has the meaning specified in the preamble.
           -------------------                                    --------

          "Intercompany Loan Subordination Agreement" means the Intercompany
           -----------------------------------------
     Loan Subordination Agreement, dated as of March 18, 1999, among the Loan
     Parties and the Collateral Agent.

          "Interest Rate Hedging Transactions" has the meaning specified in the
           ----------------------------------
     Credit Agreement.

          "Lenders" has the meaning specified in the recitals.
           -------                                   --------

          "Loan Documents" has the meaning specified in the Credit Agreement.
           --------------

          "Loan Parties" has the meaning specified in the preamble.
           ------------                                   --------

          "Loans" has the meaning specified in the Credit Agreement.
           -----

          "MEW" has the meaning specified in the preamble.
           ---                                   --------
<PAGE>
 
                                                                               5
          "Mortgage and Security Agreement" means the Open-End Mortgage,
           -------------------------------
     Security Agreement and Assignment of Leases and Rents, dated as of March
     18, 1999, made by EME Homer City in favor of the Collateral Agent.

          "Mortgaged Property" has the meaning specified in the Mortgage and
           ------------------
     Security Agreement.

          "Notice of Action" has the meaning specified in Section 4.4(b) of this
           ----------------                               --------------
     Agreement.  

          "Obligations" means, collectively, (i) the Borrower Obligations
           -----------
     and (ii) the Guarantor Obligations.

          "Ordinary Course Letter of Credit Indebtedness" has the meaning
           ---------------------------------------------
     specified in the recitals.

          "Required Lenders" has the meaning specified in the Credit Agreement.
           ----------------

          "Required Secured Parties" means, at any time, holders of Senior Debt
           ------------------------
     that at such time hold greater than 50% of the sum of (u) in the case of
     the Loans, the Commitments at such time, (v) in the case of Refinancing
     Indebtedness, the aggregate principal amount of Refinancing Indebtedness
     outstanding at such time, (w) in the case of Additional Indebtedness, the
     aggregate principal amount of Additional Indebtedness outstanding at such
     time, (x) in the case of DSR Letter of Credit Indebtedness, the commitments
     with respect thereto at such time, (y) in the case of Ordinary Course
     Letter of Credit Indebtedness, the commitments with respect thereto at such
     time and (z) in the case of Swap Indebtedness, (i) prior to the occurrence
     of an Event of Default, zero, and (ii) after the occurrence of an Event of
     Default, the termination value of the Interest Rate Hedging Transaction
     underlying such Swap Indebtedness.

          "Secured Parties" has the meaning specified in the Guarantee and
           ---------------
     Collateral Agreement.

          "Secured Parties' Representative" means the Administrative Agent and
           -------------------------------
     each Person that serves as indenture trustee, collateral agent, lender's
     representative or in any similar capacity for Persons that provide any
     Senior Debt.

          "Security Deposit Agreement" means the Security Deposit Agreement,
           --------------------------
     dated as of March 18, 1999, among the Loan Parties and the Collateral
     Agent.

          "Security Deposit Agreement Collateral" means all Accounts and all
           -------------------------------------
     cash, cash equivalents, instruments, investments and other securities on
     deposit therein.
<PAGE>
 
                                                                               6

          "Security Documents" means (a) this Agreement, the Guarantee and
           ------------------ 
     Collateral Agreement, the Mortgage and Security Agreement, the Intercompany
     Loan Subordination Agreement, the Security Deposit Agreement and (b) the
     EME Credit Support Guarantee and any other agreement or instrument
     hereafter entered into by the Borrower or any other Person which guarantees
     or secures payment of any Senior Debt.

          "Senior Debt" means the Loans, any Refinancing Indebtedness, any
           -----------
     Ordinary Course Letter of Credit Indebtedness, any DSR Letter of Credit
     Indebtedness, any Additional Indebtedness and any Swap Indebtedness.

          "Senior Debt Supplement" means a Senior Debt Supplement, substantially
           ----------------------
     in the form of Exhibit A.
                    ---------

          "Swap Indebtedness" has the meaning specified in the recitals.
           -----------------

          SECTION  1.2  Other Definitional Provisions.  (a)  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, appendix and exhibit references are to
this Agreement unless otherwise specified.

          (b) Each reference in this Agreement to a Financing Document or other
agreement shall be deemed to refer to such Financing Document or other agreement
as the same may be amended, supplemented or otherwise modified from time to
time.

          (c) Any term defined by reference to an agreement, instrument or other
document shall have the meaning so assigned to it whether or not such agreement,
instrument or document is in effect.

          (d) Each reference in this Agreement to a Person shall be deemed to
include such Person's successors and assigns.

          (e) Each reference in this Agreement to a Requirement of Law shall be
deemed to refer to such Requirement of Law as the same may be amended,
supplemented or otherwise modified from time to time.

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

                                   SECTION 2.
                              THE COLLATERAL AGENT

          SECTION  2.1  Appointment.  Each of the Secured Parties'
                        -----------
Representatives hereby designates and appoints United States Trust Company of
New York as the collateral agent
<PAGE>
 
                                                                               7

for such Secured Parties' Representative under the Security Documents, and
authorizes United States Trust Company of New York in such capacity to take such
action on its behalf under the provisions of the Security Documents and to
exercise such powers and perform such duties as are expressly delegated to it by
the terms of this Agreement, together with such other powers as are incidental
thereto.  Notwithstanding any provision to the contrary elsewhere in this
Agreement, the Collateral Agent shall not have any duties or responsibilities,
except those expressly set forth herein and in the other Security Documents, and
no implied covenants, functions, responsibilities, duties, obligations or
liabilities shall be read into this Agreement or otherwise exist against the
Collateral Agent.

          SECTION  2.2  Exculpatory Provisions.  (a)  The Collateral Agent makes
                        ----------------------
no representations as to the value or condition of the Collateral or any part
thereof, or as to the title of the Loan Parties thereto or as to the security
afforded by any Security Document, or as to the validity, execution,
enforceability, legality or sufficiency of any Financing Document or the
Obligations, and the Collateral Agent shall incur no liability or responsibility
in respect of any such matters.  The Collateral Agent shall not be responsible
for insuring the Collateral or for the payment of taxes, charges or assessments
or discharging of liens upon the Collateral or otherwise as to the maintenance
of the Collateral.

          (b) The Collateral Agent shall not be required to ascertain or inquire
as to performance by the Loan Parties of any of the covenants or agreements
contained in any Financing Document.

          (c) The Collateral Agent shall be under no obligation or duty to take
any action under any Security Document if taking such action (i) would subject
the Collateral Agent to a tax in any jurisdiction (other than the Commonwealth
of Pennsylvania) where it is not then subject to a tax or (ii) would require the
Collateral Agent to qualify to do business in any jurisdiction (other than the
Commonwealth of Pennsylvania) where it is not then so qualified, unless the
Collateral Agent receives security or indemnification satisfactory to it against
such tax (or equivalent liability), or any liability resulting from such
qualification, in each case as results from the taking of such action under any
Security Document.

          (d) The Collateral Agent may accept deposits from, lend money to, and
generally engage in any kind of business with the Borrower or any of its
subsidiaries or affiliates as if it were not the Collateral Agent.

          (e) The Collateral Agent shall have no duty to inquire as to the
application by any Secured Parties' Representative or any holders of Senior Debt
of any amounts distributed to them.

          SECTION  2.3  Delegation of Duties.  The Collateral Agent may execute
                        --------------------
any of the powers hereof and perform any duty hereunder either directly or by or
through agents or attorneys-in-fact who may include officers or employees of the
Loan Parties.  The Collateral
<PAGE>
 
                                                                               8

Agent shall be entitled to advice of counsel concerning all matters pertaining
to such powers and duties.  The Collateral Agent shall not be responsible for
the negligence or misconduct of any agents or attorneys-in-fact selected by it;
provided that such selection occurs without gross negligence or willful
- --------
misconduct or bad faith.

          SECTION  2.4  Reliance by Collateral Agent.  (a)  Whenever in the
                        ----------------------------
administration of the Security Documents the Collateral Agent shall deem it
necessary or desirable that a factual matter be proved or established in
connection with the Collateral Agent taking, suffering or omitting any action
hereunder or thereunder, such matter (unless other evidence in respect thereof
is herein specifically prescribed) may be deemed to be conclusively proved or
established by a Request Letter or certificate of an Authorized Representative
of any Loan Party delivered to the Collateral Agent, and such certificate shall
be full authorization to the Collateral Agent for any action taken, suffered or
omitted in reliance thereon, subject, however, to the provisions of Section 2.5.

          (b) The Collateral Agent may consult with counsel, and any advice or
statements of legal counsel (including counsel to the Loan Parties) shall be
full and complete authorization and protection in respect of any action taken or
suffered by it under any Security Document in good faith reliance thereon.

          (c) The Collateral Agent may rely, and shall be fully protected in
acting, upon any resolution, statement, certificate, instrument, opinion,
report, notice, request, consent, order, bond or other paper or document
reasonably believed by it to be genuine and to have been signed or presented by
the proper party or parties or, in the case of cables, telecopies and telexes,
to have been sent by the proper party or parties.  In the absence of its
negligence or willful misconduct or bad faith, the Collateral Agent may
conclusively rely, as to the truth of the statements and the correctness of the
opinions expressed therein, upon any Request Letter, certificate or opinion
furnished to the Collateral Agent and conforming to the requirements of this
Agreement or the Security Deposit Agreement.

          (d) The Collateral Agent shall not be under any obligation to exercise
any of the rights or powers vested in it by the Security Documents unless the
Collateral Agent shall have been provided adequate security and indemnity by the
Secured Parties against the costs, expenses (including its customary fees) and
liabilities which may be incurred by it in compliance with such request or
direction, including such reasonable advances as may be requested by the
Collateral Agent.

          SECTION  2.5  Limitations on Duties of Collateral Agent.  (a)  The
                        -----------------------------------------
Collateral Agent shall not be obligated to take any action, or refrain from
taking any action, under or in respect of any Security Document except for the
performance of such duties as are specifically required hereby and except as may
be requested from time to time in writing by one or more Secured Parties'
Representatives acting on behalf of the Required Secured Parties or such other
combination of Secured Parties as may be specified in any applicable provision
of this Agreement.
<PAGE>
 
                                                                               9

          If an Event of Default exists and if the Collateral Agent shall have
actual knowledge thereof, the Collateral Agent will exercise such rights, powers
and remedies (whether vested by any Security Document or by statute or by law or
otherwise) for the protection and enforcement of the Collateral Agent's rights
under and in respect of the Security Documents as, in the absence of a Notice of
Action, it may determine to be in the best interest of the Secured Parties, or
as may be directed in writing pursuant to a Notice of Action, and shall use the
same degree of care and skill in such exercise as a prudent man would use under
the circumstances in the conduct of his own affairs.

          (b) In the event that the Collateral Agent shall have received
incomplete or insufficient information to perform its duties hereunder or
requires clarification of any matter, the Collateral Agent shall be entitled to
request direction from, and to act, or refrain from acting, on the written
direction of one or more Secured Parties' Representatives acting on behalf of
the Required Secured Parties, and the Collateral Agent shall be fully protected
in relying on such direction or in failing to act until the receipt of such
information or clarification.

          (c) No provision of any Security Document shall be deemed to impose
any duty or obligation on the Collateral Agent to perform any act or acts or
exercise any right, power, duty or obligation conferred or imposed on it, in any
jurisdiction in which it shall be illegal, or in which the Collateral Agent
shall be unqualified or incompetent, to perform any such act or acts or to
exercise any such right, power, duty or obligation or if such performance or
exercise would constitute doing business by the Collateral Agent in such
jurisdiction or impose a tax on the Collateral Agent by reason thereof.

          SECTION  2.6  Resignation and Removal of the Collateral Agent.  (a)
                        -----------------------------------------------
The Collateral Agent may at any time, by giving not less than 30 days' prior
written notice to the Borrower and each Secured Parties' Representative, resign
and be discharged of the responsibilities hereby created, such resignation and
discharge to be effective upon the appointment of a successor Collateral Agent.
As promptly as practicable after the giving of any such notice, one or more
Secured Parties' Representatives acting on behalf of the Required Secured
Parties shall appoint a successor Collateral Agent.  One or more Secured
Parties' Representatives acting on behalf of the Required Secured Parties may,
at any time upon giving 10 days' prior written notice thereof to the Borrower
and the Collateral Agent, remove the Collateral Agent and appoint a successor
Collateral Agent, such removal to be effective upon the acceptance of such
appointment by the successor.  The Collateral Agent who has resigned or been
removed shall be entitled to fees, reasonable costs and expenses to the extent
incurred or arising, or relating to events occurring, before its resignation or
removal.

          (b)  If at any time the Collateral Agent shall resign or be removed or
otherwise become incapable of acting, or if at any time a vacancy shall occur in
the office of the Collateral Agent for any other cause, a successor Collateral
Agent may be appointed by one or more Secured Parties' Representatives acting on
behalf of the Required Secured Parties.  The powers, duties, authority and title
of the predecessor Collateral Agent shall be terminated and canceled
<PAGE>
 
                                                                              10
without procuring the resignation of such predecessor and without any other
formality (except as may be required by applicable law) than appointment and
designation of a successor in writing duly acknowledged and delivered to the
predecessor and the Borrower.  Such appointment and designation shall be full
evidence of the right and authority to make the same and of all the facts
therein recited, and the Security Documents shall vest in such successor,
without any further act, deed or conveyance, all the estates, properties,
rights, powers, trust, duties, authority and title of its predecessor; provided,
                                                                       --------
however, that such predecessor shall, nevertheless, on the written request of
- -------
one or more Secured Parties' Representatives acting on behalf of the Required
Secured Parties, the Borrower or the successor execute and deliver an instrument
transferring to such successor all the estates, properties, rights, powers,
trusts, duties, authority and title of such predecessor under the Security
Documents and shall deliver all Collateral held by it or its agents to such
successor.  Should any deed, conveyance or other instrument in writing from the
any Loan Party be reasonably required or requested by any successor Collateral
Agent for more fully and certainly vesting in such successor the estates,
properties, rights, powers, trusts, duties, authority and title vested or
intended to be vested in the predecessor Collateral Agent, then any and all such
deeds, conveyances and other instruments shall, on request of such successor, be
executed, acknowledged and delivered by such Loan Party.  If the Borrower shall
not have executed and delivered any such deed, conveyance or other instrument
within 10 days after it receives a written request from the successor Collateral
Agent to do so, or if an Event of Default is in effect, the predecessor
Collateral Agent may execute the same on behalf of such Loan Party.  Each Loan
Party hereby appoints any successor Collateral Agent as its agent and attorney-
in-fact to act for it as provided in the next preceding sentence.

          SECTION  2.7  Treatment of Secured Parties' Representative by
                        -----------------------------------------------
Collateral Agent.  Unless and until the Collateral Agent receives notice to the
- ----------------
contrary, the Collateral Agent shall be entitled to treat the Administrative
Agent and each Person who becomes a party hereto through the execution and
delivery of a Senior Debt Supplement as the duly authorized Secured Parties'
Representative of the Secured Parties it purports to represent and, as such,
authorized to receive all payments, to give all notices, cast all votes and
exercise all other rights under this Agreement and the other Security Documents
on behalf of such Secured Parties.

          SECTION  2.8  Appointment of Separate or Co-Collateral Agent.  (a)
                        ----------------------------------------------
The Collateral Agent may, and, upon the request of one or more Secured Parties'
Representative acting on behalf of the Required Secured Parties, the Collateral
Agent shall, by an instrument in writing delivered to the Borrower and to each
of the Secured Parties' Representatives, appoint a national bank or trust
company or an individual to act as separate collateral agent or co-collateral
agent for any purpose deemed by the Collateral Agent or such Secured Parties'
Representatives to be advantageous to their respective interests, such separate
collateral agent or co-collateral agent to exercise only such rights and to have
only such duties as shall be specified in the instrument of appointment.  The
Borrower agrees to pay the reasonable compensation and expenses of any such
separate collateral agent or co-collateral agent and, if requested by the
Collateral Agent, such separate collateral agent or co-collateral agent or one
or more Secured Parties' Representatives acting on behalf of the Required
Secured Parties, the Loan Parties will enter into an amendment
<PAGE>
 
                                                                              11
to this Agreement, satisfactory in substance and form to the Collateral Agent,
such separate collateral agent or co-collateral agent and one or more Secured
Parties' Representatives' acting on behalf of the Required Secured Parties,
confirming the rights and duties of such separate collateral agent or co-
collateral agent.  No co-collateral agent hereunder shall be required to meet
the terms of eligibility of a Collateral Agent under Section 2.10.  The
Collateral Agent may at any time accept the resignation of or remove any
separate collateral agent or co-collateral agent.  

          (b)  Any separate collateral agent or co-collateral agent hereunder
shall, to the extent permitted by law, be appointed and act and the Collateral
Agent shall act, subject to the following provisions and conditions:

               (i)    all powers, duties, obligations and rights conferred upon
     the Collateral Agent in respect of the receipt, custody, investment and
     payment of monies, or the investment of monies, shall be exercised solely
     by the Collateral Agent;

               (ii)   all other rights, powers, duties and obligations conferred
     or imposed upon the Collateral Agent shall be conferred or imposed upon and
     exercised or performed by the Collateral Agent and such separate collateral
     agent or co-collateral agent jointly, except to the extent that under any
     law of any jurisdiction in which any particular act or acts are to be
     performed, the Collateral Agent shall be incompetent or unqualified to
     perform such act or acts, in which event such rights, powers, duties and
     obligations shall be exercised and performed by such separate collateral
     agent or co-collateral agent;

               (iii)  no power hereby given to any such separate collateral
     agent or co-collateral agent shall be exercised hereunder by such separate
     collateral agent or co-collateral agent except jointly with, or with the
     consent of, the Collateral Agent; and

               (iv)   no collateral agent shall be liable for any act or failure
     to act on the part of any other collateral agent hereunder.

          SECTION  2.9  Successor Collateral Agent by Merger, Consolidation,
                        ---------------------------------------------------
Etc.  Any corporation into which the Collateral Agent may be merged or with
- ---
which it may be consolidated, or any corporation resulting from any merger or
consolidation to which the Collateral Agent is a party, if eligible as provided
in Section 2.10, shall automatically succeed to all of the rights and
obligations of the Collateral Agent hereunder and with respect to the Collateral
without further action on the part of any of the parties hereto.

          SECTION  2.10  Eligibility of Collateral Agent.  The Collateral Agent
                         -------------------------------
shall always be a state or national bank or trust company in good standing,
organized under the laws of the United States of America or one of the States
thereof, having (or having a parent which has) a capital, surplus and undivided
profits (as shown by its latest financial statement published to its
shareholders) aggregating at least $100,000,000 if there be such a national bank
or trust company willing and able to accept such trust upon reasonable and
customary terms, provided that if such
                 --------   
<PAGE>
 
                                                                              12
national bank or trust company's eligibility depends upon its parent having such
requisite capitalization, such parent shall provide a guarantee satisfactory in
form and substance to one or more Secured Parties' Representatives acting on
behalf of the Required Secured Parties of the obligations of such national bank
or trust company as Collateral Agent under the Financing Documents.  In case at
any time the Collateral Agent shall cease to be eligible in accordance with the
provisions of this Section 2.10, the Collateral Agent shall resign immediately
in the manner and with the effect specified in Section 2.6.

          SECTION  2.11  Notices, Etc., Under Collateral, Etc.  The Collateral
                         ------------------------------------
Agent shall deliver to each Secured Parties' Representative, promptly upon
receipt thereof, duplicates or copies of all notices, requests and other
instruments given or received by the Collateral Agent under or pursuant to the
Security Documents.

                                   SECTION 3.
                                  SENIOR DEBT

          SECTION  3.1  Obligations Pari Passu.  Subject, in the case of Senior
                        ---------------------- 
Debt other than the Loans, to the requirements of Section 3.2, all Obligations
shall be entitled to the benefits of this Agreement and the other Security
Documents and rank pari passu without any preference among Obligations by reason
                   ----------
of date of incurrence or otherwise.

          SECTION  3.2  Senior Debt.  The Secured Parties' Representative for
                        -----------        
any Senior Debt permitted by the Financing Documents shall become entitled to
the benefits of this Agreement (and such Senior Debt shall rank pari passu) upon
receipt by the Collateral Agent and each other Secured Parties' Representative
of (a) a certificate executed by an Authorized Representative of the Borrower
(i) identifying such Secured Parties' Representative and the maximum principal
amount of such Senior Debt and (ii) identifying the provisions of the Financing
Documents pursuant to which such Senior Debt is permitted and demonstrating
compliance with such provisions, (b) a certified copy of each agreement relating
to such Senior Debt, (c) a certified copy of a Senior Debt Supplement executed
by such holder and (d) an opinion of Skadden, Arps, Slate, Meagher & Flom LLP,
or other counsel satisfactory to the Collateral Agent, in form and substance
satisfactory to the Collateral Agent, that, subject to customary assumptions and
qualifications, the incurrence of such Senior Debt will not result in any
violation of or conflict with or constitute a default under any term of any
Financing Document.  The requirements of this Section 3.2 shall not apply to the
Loans, which are Senior Debt for all purposes of this Agreement and the other
Security Documents.
<PAGE>
 
                                                                              13

                                   SECTION 4.
                                 DEFAULT PERIOD

          SECTION  4.1  Default and Acceleration Notices.  (a)  A Default Notice
                        --------------------------------
or Acceleration Notice shall be effective upon receipt thereof by the Collateral
Agent.  A Default Notice or Acceleration Notice, once effective, shall remain in
effect unless and until it is canceled as provided in Section 4.1(b).

          (b)  Any Secured Parties' Representative that has given a Default
Notice or Acceleration Notice shall be entitled to cancel it by delivering a
written notice of cancellation to the Collateral Agent (i) prior to the
commencement of the exercise of remedies by the Collateral Agent pursuant to the
Security Documents or (ii) thereafter, if the Collateral Agent reasonably
believes that any such exercise of remedies may be reversed without undue
difficulty.
          (c) Promptly upon receipt by the Collateral Agent of a Default Notice
or Acceleration Notice or any notice of cancellation thereof, the Collateral
Agent shall deliver a copy thereof to the Borrower and each Secured Parties'
Representative.

          SECTION  4.2  General Authority of the Collateral Agent over the
                        -------------------------------------------------- 
Collateral.  Each Loan Party hereby irrevocably constitutes and appoints,
- ----------
effective after the occurrence and during the continuance of an Event of
Default, the Collateral Agent and any officer or agent thereof, with full power
of substitution as among such officers and agents, as its true and lawful
attorney-in-fact with full power and authority in the name of such Loan Party or
in its own name, from time to time in the Collateral Agent's reasonable
discretion to take any and all appropriate action and to execute any and all
documents and instruments which may be necessary or desirable to carry out the
terms of the Security Documents (but subject to the terms hereof and thereof)
and to accomplish the purposes hereof and thereof; and, without limiting the
generality of the foregoing, each Loan Party hereby gives the Collateral Agent,
during any Default Period, the power and right on behalf of such Loan Party,
without notice to or further assent by such Loan Party, to:  (i) ask for,
demand, sue for, collect, receive and give acquittance for any and all moneys
due or to become due upon, or in connection with, the Collateral; (ii) receive,
take, endorse, assign and deliver any and all checks, notes, drafts,
acceptances, documents and other negotiable and non-negotiable instruments taken
or received by the Collateral Agent as, or in connection with, the Collateral;
(iii) commence, prosecute, defend, settle, compromise or adjust any claim, suit,
action or proceeding with respect to, or in connection with, the Collateral;
(iv) sell, transfer, assign or otherwise deal in or with the Collateral or any
part thereof as fully and effectively as if the Collateral Agent were the
absolute owner thereof; (v) exercise all remedies provided for by the Security
Documents; and (vi) do, at its option and at the expense and for the account of
such Loan Party, at any time or from time to time, all acts and things which the
Collateral Agent reasonably deems necessary to perfect the liens and security
interests of the Collateral Agent in the Collateral, to protect or preserve the
Collateral and to realize upon the Collateral.  Each Loan Party hereby ratifies
all that said attorneys-in-fact shall lawfully do or cause
<PAGE>
 
                                                                              14
to be done by virtue hereof.  This power of attorney is a power coupled with an
interest and shall be irrevocable.

          SECTION  4.3  Right to Initiate Judicial Proceedings; Appointment of
                        ------------------------------------------------------
Receiver. (a) During any Default Period, the Collateral Agent, subject to the
- --------
provisions of Section 4.4(b), shall have the right to protect and enforce the
rights vested in it by each Security Document and may enforce such rights in
accordance with the provisions of the relevant Security Document.

          (b) During any Default Period, upon the filing of a bill in equity or
other commencement of judicial proceedings or non-judicial proceedings to
enforce the rights of the Secured Parties or the Collateral Agent under any
Security Document, the Collateral Agent shall, without notice to the Loan
Parties or any party claiming through the Loan Parties, without regard to the
solvency or insolvency at the time of any Person then liable for the payment of
any of the Obligations, without regard to the then value of the Collateral and
without requiring any bond from any complainant in such proceedings, be entitled
as a matter of right to the appointment of a receiver or receivers, for all or
any part thereof, and of the rents, issues, tolls, profits, royalties, revenues
and other income thereof, pending such proceedings, with such powers as the
court making such appointment shall confer, and to the entry of an order
directing that the rents, issues, tolls, profits, royalties, revenues and other
income of the property relating to the Collateral be segregated, sequestered and
impounded for the benefit of the Collateral Agent and the Secured Parties, and
each Loan Party irrevocably consents to the appointments of such receiver or
receivers and to the entry of such order; provided that notwithstanding the
appointment of any receiver, the Collateral Agent shall be entitled to retain
possession and control of all cash held by or deposited with it pursuant to any
Security Document.

          SECTION  4.4  Exercise of Powers; Instructions of Required Secured
                        ----------------------------------------------------
Parties.  (a) All of the powers, remedies and rights of the Collateral Agent set
- -------
forth in or contemplated by this Agreement may be exercised by the Collateral
Agent in respect of each Security Document as though set forth in full therein,
and all of the powers, remedies and rights of the Collateral Agent and the
Secured Parties as set forth in each Security Document may be exercised from
time to time as herein and therein provided.  In the event of any inconsistency
between this Agreement and any other Security Document, the provisions of this
Agreement shall be controlling.

          (b) Following the delivery of an Acceleration Notice to the Collateral
Agent, during any Default Period, the Required Secured Parties may deliver a
notice (any such notice, a "Notice of Action") to the Collateral Agent directing
                            ----------------
the Collateral Agent to exercise one or more of the rights and remedies
available to the Collateral Agent under this Agreement and the other Security
Documents.  The Collateral Agent shall deliver to each Secured Party a copy of
such Notice of Action promptly after receipt thereof.  The Collateral Agent
shall exercise the rights and remedies and take the other actions described in
such Notice of Action at the time or times specified in such Notice of Action.
<PAGE>
 
                                                                              15

          (c) All Proceeds of Collateral received by the Collateral Agent from
the exercise of its rights and remedies under this Agreement and the other
Security Documents shall be applied as set forth in Section 4.14 of the Security
Deposit Agreement.

          SECTION  4.5  Remedies Not Exclusive.  (a)  No remedy conferred upon
                        ----------------------
or reserved to the Collateral Agent in the Security Documents is intended to be
exclusive of any other remedy or remedies, but every such remedy shall be
cumulative and shall be in addition to every other remedy conferred in any
Security Document or now or hereafter existing at law or in equity or by
statute.

          (b)  No delay or omission by the Collateral Agent to exercise any
right, remedy or power under any Security Document shall impair any such right,
remedy or power or shall be construed to be a waiver thereof, and every right,
power and remedy given by any Security Document to the Collateral Agent may be
exercised from time to time and as often as may be deemed expedient by the
Collateral Agent.

          (c) If the Collateral Agent shall have proceeded to enforce any right,
remedy or power under any Security Document and the proceeding for the
enforcement thereof shall have been discontinued or abandoned for any reason or
shall have been determined adversely to the Collateral Agent, then the Loan
Parties, the Collateral Agent and the Secured Parties shall, subject to any
effect of or determination in such proceeding, severally and respectively be
restored to their former positions and rights hereunder or thereunder and in all
other respects, and thereafter all rights, remedies and powers of the Collateral
Agent shall continue as though no such proceeding had been taken.

          (d) All rights of action and of asserting claims upon or under the
Security Documents may be enforced by the Collateral Agent without the
possession of any document or instrument evidencing or relating to any
Obligation or the production thereof at any trial or other proceeding relative
thereto; any suit or proceeding instituted by the Collateral Agent shall be,
subject to the provisions of Section 2.5(c), brought in its name as Collateral
Agent; and any recovery of judgment shall be held as part of the Collateral.

          SECTION  4.6  Waiver and Estoppel.  (a)  To the extent it may lawfully
                        -------------------
do so, each Loan Party agrees that, during any Default Period, it will not at
any time in any manner whatsoever claim or take the benefit or advantage of, any
appraisement, valuation, stay, extension, moratorium, turnover or redemption
law, or any law permitting it to direct the order in which the Collateral shall
be sold, now or at any time hereafter in force, which may delay, prevent or
otherwise affect the performance or enforcement of any Security Document and
hereby waives all benefit or advantage of all such laws and covenants, to the
extent that it may lawfully do so, that it will not hinder, delay or impede the
execution of any power granted to the Collateral Agent in any Security Document
but will suffer and permit the execution of every such power as though no such
law were in force.
<PAGE>
 
                                                                              16

          (b) To the extent it may lawfully do so, each Loan Party, on behalf of
itself and all who claim through or under it (including, without limitation, any
and all subsequent creditors, vendees, assignees and lienors), hereby waives and
releases all rights to demand or to have any marshaling of the Collateral upon
any sale during any Default Period whether made under any power of sale granted
in any Security Document or pursuant to judicial proceedings or upon any
foreclosure or any enforcement of any Security Document and consents and agrees
that all the Collateral may at any such sale be offered and sold in a
commercially reasonable manner as an entirety or in lots as the Collateral Agent
and the Secured Parties may determine.

          (c) To the extent it may lawfully do so, each Loan Party hereby waives
presentment, demand, protest and any notice of any kind (including, without
limitation, notice of intent to accelerate maturity or notice of acceleration of
maturity, except notices explicitly required hereunder or under the Financing
Documents) in connection with the Security Documents and any action taken by the
Collateral Agent with respect to the Collateral during any Default Period.

          SECTION  4.7  Limitation on Collateral Agent's Duty in Respect of
                        ---------------------------------------------------
Collateral.  Beyond its duties as to the custody thereof expressly provided in
- ----------
any Security Document, the Collateral Agent shall not have any duty to the Loan
Parties or to the Secured Parties as to any Collateral in its possession or
control or in the possession or control of any of its agents or nominees, or any
income thereon or as to the preservation of rights against prior parties or any
other rights pertaining thereto.

          SECTION  4.8  Limitation by Law.  All rights, remedies and powers
                        -----------------
provided herein may be exercised only to the extent that the exercise thereof
does not violate any applicable provision of law, and all the provisions hereof
are intended to be subject to all applicable mandatory provisions of law which
may be controlling and to be limited to the extent necessary so that they will
not render this Agreement invalid, unenforceable in whole or in part or not
entitled to be recorded, registered or filed under the provisions of any
applicable law.

          SECTION  4.9  Consent to Relief from Automatic Stay.  Each Loan Party
                        -------------------------------------
hereby agrees that if (A) it shall (i) file with any bankruptcy court of
competent jurisdiction or be the subject of any petition under Title 11 of the
U.S. Code, as amended, (ii) be the subject of any order for relief issued under
such Title 11 of the U.S. Code, as amended, (iii) file or be the subject of any
petition seeking any reorganization, arrangement, composition, readjustment,
liquidation, dissolution or similar relief under any present or future federal
or state act or law relating to bankruptcy, insolvency, or other relief for
debtors, (iv) seek, consent to or acquiesce in the appointment of any trustee,
receiver, conservator or liquidator, (v) a trustee, receiver, conservator or
liquidator is appointed for such Loan Party or any substantial part of its
assets, (vi) be the subject of any order, judgment or decree entered by any
court of competent jurisdiction approving a petition filed against such Loan
Party for any reorganization, arrangement, composition, readjustment,
liquidation, dissolution or similar relief under any present or future federal
or state act or law relating to bankruptcy, insolvency or relief for debtors,
then (B) the Collateral Agent
<PAGE>
 
                                                                              17

and the Secured Parties shall thereupon be entitled to relief from any automatic
stay imposed by Section 362 of Title 11 of the U.S. Code, as amended, or from
any other stay or suspension of remedies resulting from any of the events listed
in clauses (i) through (vi) above in this sentence, solely with respect to the
exercise of the rights and remedies described in the preceding sentence (and not
with respect to any other right or remedy).  Each Loan Party acknowledges that
the Collateral Agent and the Secured Parties are entitled to such relief as a
result of good faith bargaining and as part of the consideration for the Secured
Parties providing the Senior Debt.

                                   SECTION 5.
                                    PAYMENTS

          SECTION  5.1  Pro Rata Sharing.  If, through the operation of any
                        ----------------
bankruptcy, reorganization, insolvency or other laws or otherwise, the
Collateral Agent's security interest under the Security Documents is enforced
with respect to some, but not all, of the Obligations then outstanding, the
Collateral Agent shall nonetheless apply all Proceeds for the benefit of the
holders of all Obligations in the proportions and subject to the priorities
specified herein and in the Security Deposit Agreement.  To the extent that the
Collateral Agent applies Proceeds as set forth in the preceding sentence
collected with respect to Obligations held by one holder to or on behalf of
Obligations held by a second holder, the first holder shall be deemed to have
purchased a participation in the Obligations held by the second holder, or shall
be subrogated to the rights of the second holder to receive any subsequent
payments and distributions made with respect to the portion thereof paid or to
be paid by the application of such Proceeds.

          SECTION 5.2  Disbursement of Monies Collected after Acceleration.  Any
                       --------------------------------------------------- 
monies held by the Collateral Agent at the date, or collected by the Collateral
Agent after, all Obligations have been declared to be or have otherwise become
due and payable shall be applied in the following order of priority specified in
the Section 4.14 of the Security Deposit Agreement.

                                   SECTION 6.
                        AGREEMENTS WITH COLLATERAL AGENT

          SECTION  6.1  Delivery of Financing Documents.  The Collateral Agent
                        -------------------------------
acknowledges receipt from the Borrower of copies of all Financing Documents as
in effect on the date hereof, certified by the Borrower to be true and correct.
The Borrower shall deliver to the Collateral Agent, promptly upon the execution
thereof, a true and complete copy of each additional Financing Document and all
amendments, supplements or other modifications to any Financing Document entered
into after the date hereof.

          SECTION  6.2  Information as to Secured Parties' Representatives.  The
                        --------------------------------------------------
Borrower shall deliver to the Collateral Agent, upon the initial incurrence of
each class of Senior Debt (other than the Loans) and thereafter from time to
time upon request of the Collateral
<PAGE>
 
                                                                              18
Agent, a list setting forth the aggregate unpaid principal amount of Senior Debt
outstanding, the name and address of each Secured Parties' Representative and
the unpaid principal amount of Obligations relating to the Senior Debt
represented by such Secured Parties' Representative.  In addition, the Borrower
will promptly notify the Collateral Agent of any change in the identity of any
Secured Parties' Representative.

          SECTION  6.3  Certificate of Secured Parties' Representative.  Any
                        ----------------------------------------------
action or direction taken by the Secured Parties hereunder shall be pursuant to
a certificate or certificates executed by Secured Parties' Representatives
representing the required combination of Secured Parties and certifying as to
the amounts of Obligations held by such Secured Parties and that such Secured
Parties constitute the required combination of Secured Parties for purposes of
the action or direction taken by such Secured Parties.

          SECTION  6.4  Compensation and Expenses.  The Loan Parties shall pay
                        -------------------------   
to the Collateral Agent, from time to time upon demand, (i) reasonable
compensation (which shall not be limited by any provision of law in regard to
compensation of fiduciaries or of a trustee of an express trust) for its
services hereunder and under the Security Documents and for administering the
Collateral, as set forth in the separate fee letter dated the date hereof and
(ii) all of the fees, reasonable costs and expenses of the Collateral Agent
(including, without limitation, the fees and disbursements of its counsel and
such special counsel as the Collateral Agent reasonably elects to retain) (A)
arising in connection with the preparation, execution, delivery, modification,
administration and termination of each Security Document or the enforcement of
any of the provisions hereof or thereof, (B) incurred or required to be advanced
in connection with the administration of the Collateral, the sale or other
disposition of Collateral pursuant to this Agreement or any other Security
Document and the preservation, protection or defense of the Collateral Agent's
rights under the Security Documents and in and to the Collateral or (c) incurred
                                                                     -   
by the Collateral Agent in connection with the resignation of the Collateral
Agent pursuant to Section 2.6(a).  The obligations of the Loan Parties under
this Section 6.4 shall survive the termination of the other provisions of this
Agreement.

          SECTION  6.5  Stamp and Other Similar Taxes.  The Loan Parties shall
                        -----------------------------
indemnify and hold harmless the Collateral Agent and each Secured Party from any
present or future claim for liability for any stamp or any other similar tax and
any penalties or interest with respect thereto, which may be assessed, levied or
collected by any jurisdiction in connection with any Security Document or any
Collateral pertaining to the period that such agreements were in effect.  The
obligations of the Loan Parties under this Section 6.5 shall survive the
termination of the other provisions of this Agreement.

          SECTION  6.6  Filing Fees, Excise Taxes, Etc.  The Loan Parties shall
                        ------------------------------
pay or reimburse the Collateral Agent for any and all payments made by the
Collateral Agent in respect of all search, filing, recording and registration
fees, taxes, excise taxes and other similar imposts which may be payable or
determined to be payable in respect of the execution and delivery of each
<PAGE>
 
                                                                              19
Security Document.  The obligations of the Loan Parties under this Section 6.6
shall survive the termination of the other provisions of this Agreement.

          SECTION  6.7  Indemnification.  The Loan Parties shall pay, indemnify,
                        ---------------
and hold the Collateral Agent and the Secured Parties harmless from and against
any and all liabilities, obligations, losses, damages, penalties, actions,
judgments, suits, reasonable costs, reasonable expenses (including, without
limitation, the fees of counsel) or disbursements of any kind or nature with
respect to the execution, delivery, enforcement, performance and administration
of the Security Documents (collectively, the "Indemnified Liabilities"), unless
                                              -----------------------
arising solely from the gross negligence, willful misconduct or bad faith of the
indemnified party.  In any suit, proceeding or action brought, in accordance
with the provisions of this Agreement, by the Collateral Agent under or with
respect to any contract, agreement, interest or obligation constituting part of
the Collateral for any sum owing thereunder, or to enforce any provisions
thereof, the Loan Parties will save, indemnify and keep the Collateral Agent and
the Secured Parties harmless from and against all expense, loss or damage
suffered by reason of any defense, setoff, counterclaim, recoupment or reduction
of liability whatsoever of the obligor thereunder, arising out of a breach by
the any Loan Party of any obligation thereunder or arising out of any other
agreement, indebtedness or liability at any time owing to or in favor of such
obligor or its successors from any Loan Party and all such obligations of the
Loan Parties shall be and remain enforceable against and only against the Loan
Parties and shall not be enforceable against the Collateral Agent, any Secured
Parties' Representative or any Secured Party.  The agreements in this Section
6.7 shall survive the termination of the other provisions of this Agreement.

          SECTION  6.8  Further Assurances.  At any time and from time to time,
                        ------------------   
upon the written request of the Collateral Agent, and at the expense of the
relevant Loan Party, such Loan Party  will promptly execute and deliver any and
all such further instruments and documents and take such further action
(including, without limitation, the delivery to the Collateral Agent or its
agent of chattel paper (as defined in the Uniform Commercial Code) which
constitutes Collateral) as is necessary or reasonably requested further to
perfect, or to protect the perfection of, the liens and security interests
granted under the Security Documents, including, without limitation, the filing
of any financing or continuation statements under the Uniform Commercial Code in
effect in any such jurisdiction.  Each Loan Party also hereby authorizes the
Collateral Agent to sign and to file any such financing or continuation
statements without the signature of such Loan Party to the extent permitted by
applicable law, and to file a carbon, photostatic, photographic or other
reproduction of any Security Document or a Uniform Commercial Code financing
statement.  

          SECTION  6.9  Payment by Collateral Agent, Etc.  All payments by the
                        --------------------------------
Collateral Agent hereunder to the Secured Parties shall be made by wire transfer
to such Secured Party at such address as shall have been specified by such
Secured Party to the Collateral Agent.  Any Secured Party may at any time and
from time to time specify an alternative method of payment for such Secured
Party by giving written notice thereof to the Collateral Agent.
<PAGE>
 
                                                                              20

                                   SECTION 7.
                         REPRESENTATIONS AND WARRANTIES

          SECTION  7.1  Representations and Warranties.  The Collateral Agent
                        ------------------------------
and each Secured Parties' Representative represents and warrants to the other
parties hereto that (a) the execution, delivery and performance of this
Agreement (i) has been duly authorized by all requisite corporate (or other
equivalent) action on its part and (ii) will not contravene any provision of its
charter or by-laws (or other equivalent organizational documents) or any order
of any court or other Governmental Authority having applicability to it or any
applicable law, and (b) this Agreement has been duly executed and delivered by
it and constitutes its legal, valid, enforceable and binding obligation.

                                   SECTION 8.
                   CERTAIN AGREEMENTS OF THE SECURED PARTIES

          SECTION  8.1  Turnover of Collateral.  (a)  If any Secured Party
                        ----------------------
(other than the Collateral Agent) acquires custody, control or possession of any
Collateral or proceeds thereof, other than amounts from or through the
Collateral Agent (whether (i) by way of voluntary or involuntary payment, (ii)
by virtue of an exercise of any right of set-off, banker's lien or counterclaim,
(iii) as proceeds of any insurance policy covering any properties or assets of
the Loan Parties, (iv) from proceeds of liquidation or dissolution of any Loan
Party or distribution of its assets among its creditors (however such
liquidation, dissolution or distribution may occur), (v) as payment of any
Obligations following the acceleration of any Senior Debt, (vi) as consideration
for the agreement of such Secured Party, or as part of any transaction or series
of related transactions in which such Secured Party shall have agreed, to waive
or amend any provision of any Financing Document, (vii) from realization on
Collateral, (viii) by virtue of the application of any provision of any of the
Security Documents (other than this Agreement) or (ix) in any other manner) such
Secured Party shall promptly cause such Collateral or proceeds to be delivered
to or put in the custody, possession or control of the Collateral Agent for
disposition or distribution in accordance with the provisions of this Agreement.
Until such time as the provisions of the immediately preceding sentence have
been complied with, such Secured Party shall be deemed to hold such Collateral
and proceeds in trust for the parties entitled thereto hereunder.

          (b)  If an Event of Default shall have occurred and be continuing,
unless all of the Secured Parties' Representatives shall have otherwise agreed
in writing, each Secured Party shall turn over to the Collateral Agent, for
application pursuant to Section 5, any payment (whether voluntary or
involuntary, through the exercise of any right of setoff or otherwise) on
account of the Obligations received by such Secured Party during the period
commencing on a date which is ninety days prior to the date of such Event of
Default.
<PAGE>
 
                                                                              21

          SECTION  8.2  No Bankruptcy Filings.  Each of the Secured Parties'
                        ---------------------
Representatives hereby agrees on behalf of the Secured Parties that:  (a) it
will not attempt to foreclose on or assert rights against the Collateral except
as provided in this Agreement; and (b) except with the prior written consent of
the Required Secured Parties, it shall not commence any bankruptcy or insolvency
proceeding with respect to any Loan Party.

          SECTION  8.3  No Loans; No Liens.  Except as contemplated by the
                        ------------------ 
Financing Documents, none of the Secured Parties shall (a) extend credit or make
any loans or advances to any Loan Party which shall be in addition to those
provided for in the Financing Documents as in effect on the date hereof and
which shall be secured by any security interest, lien, pledge or mortgage
covering any assets of the Loan Parties whatsoever, or (b) accept any further
grant from any Loan Party of any mortgage lien on, security interest in, or
pledge of any collateral which is not granted equally and ratably to all of the
Secured Parties.

          SECTION  8.4  Security Interests.  The Collateral Agent and each of
                        ------------------  
the Secured Parties' Representatives hereby agrees that the liens and security
interests granted to the Collateral Agent under the Security Documents shall be
treated, as among the Secured Parties, as having equal priority and shall at all
times be shared by the Secured Parties as provided herein.

          SECTION  8.5  Set-offs.  If any Secured Party exercises any right of
                        --------
setoff or similar right with respect to any assets (whether or not such assets
shall constitute Collateral) of any Loan Party for payment of any outstanding
Obligations at any time during a Default Period, the amounts so set-off shall
constitute Collateral for the purposes of this Agreement and such Secured Party
shall promptly cause such amounts to be delivered or put in the custody,
possession or control of the Collateral Agent for disposition or distribution in
accordance with the provisions of Sections 5.1 and 5.2.  Until such time as the
provisions of the immediately preceding sentence have been complied with, such
Secured Party shall be deemed to hold such Collateral in trust for the parties
hereto entitled thereto hereunder.  The foregoing provisions shall not be deemed
to apply to amounts set off or deducted by the Collateral Agent in accordance
with the provisions of the Security Documents in respect of costs and expenses,
instruments returned because of insufficient funds or other amounts which the
Collateral Agent is permitted so to deduct or set-off under such subsection or
the Security Documents.

          SECTION  8.6  Intercreditor Agreement Regarding Amendment of Financing
                        --------------------------------------------------------
Documents.  In addition to any consent requirement contained in any Financing
- ---------
Document, the consent of each Secured Parties' Representative shall be required
(i) in connection with any amendment, supplement or other modification of any
Financing Document that would increase the amount of or change the scheduled
date of maturity of any Senior Debt or the scheduled date of any installment of
principal payable on any such Senior Debt, or increase the stated rate of any
interest, premium, fee or other amount payable in respect thereof or change the
scheduled date of any payment thereof, or provide for any additional mandatory
prepayment of any such Senior Debt (it being agreed that this clause shall not
be construed to limit the rights of the Loan Parties to incur Refinancing
Indebtedness, Additional Indebtedness or other Senior Debt as permitted
<PAGE>
 
                                                                              22
under the Financing Documents), (ii) to release all or any material portion of
the Collateral from the Liens of the Security Documents (except that the consent
of the Administrative Agent alone shall be required for the release of the Lien
on the capital stock of the Borrower granted pursuant to Section 3(b) of the
Guarantee and Collateral Agreement), (iii) to release any Loan Party from its
obligations under the Security Documents (except that the consent of the
Administrative Agent alone shall be required for the release of Edison Mission
Energy from its obligations under the Guarantee and Collateral Agreement), (iv)
to release Edison Mission Energy from its obligations under the EME Credit
Support Guarantee,  (v) to amend, modify or waive any provision of this
Agreement, the Security Deposit Agreement or the other Security Documents
relating to the order of priority or amounts of transfers of cash and other
property to be made hereunder or thereunder or to amend or modify the
definitions of Obligations" or "Senior Debt"  hereunder or thereunder or (vi) to
amend or modify the definition of "Required Secured Parties" under this
Agreement, the Security Deposit Agreement or any other Security Document or the
percentages required for any action to be taken under this Agreement, the
Security Deposit Agreement or any other Security Document, provided   that the
                                                           --------
consent of the Administrative Agent and any Secured Parties' Representative with
respect to any  DSR Letter of Credit Indebtedness, Ordinary Course Letter of
Credit Indebtedness or Swap Indebtedness shall not be required in connection
with any amendment of the definition of "Required Secured Parties" to reduce the
percentage specified therein solely as relates to the delivery of a Notice of
Action pursuant to Section 4.4(b).

          SECTION  8.7  Beneficiaries.  The agreements contained in this Section
                        -------------
8 are intended only for the benefit of the Secured Parties, and no Person
(including, without limitation, any Loan Party) other than the Secured Parties
shall have any rights under this Section 8.  Each Loan Party hereby consents to
the agreements contained in this Section 8 and consents to any exercise of
rights by the Collateral Agent, any Secured Parties' Representative and the
other Secured Parties pursuant to this Section 8.

          SECTION  8.8  Additional Collateral.  Each of the Secured Parties
                        --------------------- 
hereby covenants and agrees that it will not take any security interest in or
Lien on any assets of the Borrower or any subsidiary thereof to secure any of
the Obligations unless such security interest or Lien secures the payment of all
the outstanding Obligations on a pari passu basis pursuant to the Security
Documents.

          SECTION  8.9  Purchase of Collateral.  Any Secured Party may purchase
                        ----------------------
Collateral at any public sale of such Collateral pursuant to any of the Security
Documents and may make payment on account thereof by using any outstanding
Obligation then due and payable to such Secured Party from the person which
granted a security interest in such Collateral as a credit against the purchase
price to the extent, but only to the extent, approved by the Required Secured
Parties.  The Collateral Agent shall give prior notice of any such sale to each
Secured Party (to the extent that the Collateral Agent has received notice of
such sale).
<PAGE>
 
                                                                              23

                                   SECTION 9.
                                 MISCELLANEOUS

          SECTION  9.1  No Individual Action.  No Secured Party may require the
                        --------------------
Collateral Agent to take or refrain from taking any action hereunder or under
any of the Security Documents or with respect to any of the Collateral except as
and to the extent expressly set forth in this Agreement.

          SECTION  9.2  Notices.  Unless otherwise specified herein, all
                        -------
notices, requests, demands or other communications given to any Loan Party, the
Collateral Agent or any Secured Party shall be given in writing (including telex
or facsimile transmission) and shall be deemed to have been duly given when
personally delivered or when duly deposited in the mails, registered or
certified mail postage prepaid, or when transmitted by telex or facsimile
transmission, addressed (i) if to any Loan Party or the Collateral Agent, to
such party at its address specified on Schedule 1 hereto or any other address
which such party shall have specified as its address for the purpose of
communications hereunder, by notice given in accordance with this Section 9.1 to
the party sending such communication or (ii) if to any Secured Party, to it at
its address specified from time to time in the list provided by the Borrower to
the Collateral Agent pursuant to Section 6.2 or as provided by such Secured
Party, including, without limitation, the addresses specified in the Credit
Agreement, as the case may be; provided that any notice, request or demand to
                               --------   
the Collateral Agent shall not be effective until received by the Collateral
Agent at the office designated by it pursuant to this Section 9.1.  Each of the
Secured Parties agrees to issue promptly any notice given or required to be
given by such Secured Party under this Agreement.

          SECTION  9.3  No Waivers.  No failure on the part of the Collateral
                        ----------
Agent or any Secured Party to exercise, no course of dealing with respect to,
and no delay in exercising, any right, power or privilege under any Security
Document shall operate as a waiver thereof nor shall any single or partial
exercise of any such right, power or privilege preclude any other or further
exercise thereof or the exercise of any other right, power or privilege.

          SECTION  9.4  Amendments, Supplements and Waivers.  (a)  This
                        -----------------------------------
Agreement may not be amended or modified except in accordance with the
provisions of this Section 9.4.  With the written consent of the Required
Secured Parties, the Collateral Agent and the Loan Parties may, from time to
time, enter into an amendment, supplement, waiver or other modification of this
Agreement or change in any manner the rights of the Collateral Agent, the
Secured Parties or the Borrower hereunder; provided that any amendment,
                                           --------
supplement, waiver or other modification of Section 8 shall require the consent
of each Secured Parties' Representative and the Collateral Agent; provided,
                                                                  --------     
further, that any amendment, supplement, waiver or other modification of this
- -------
Section 9.4 shall require the consent of each Secured Parties' Representative,
the Collateral Agent and the Loan Parties.  Any such amendment, supplement,
waiver other modification shall be binding upon the Loan Parties, the Secured
Parties' Representatives and the Collateral Agent and their respective
successors.
<PAGE>
 
                                                                              24

          (b)  Notwithstanding clause (a) above, without the consent of any
Secured Party, the Collateral Agent, the Borrower and, as long as any
Obligations are outstanding under the Credit Agreement, the Administrative
Agent, at any time and from time to time, may enter into one or more agreements
supplemental hereto, in form satisfactory to the Collateral Agent (i) to add to
the covenants of the Loan Parties for the benefit of the Secured Parties or to
surrender any right or power herein conferred upon any Loan Party, (ii) to
mortgage or pledge to the Collateral Agent, or grant a security interest in
favor of the Collateral Agent in, any property or assets as security or
additional security for the Obligations or (iii) to cure any ambiguity, defect
or inconsistency or to make any other change that would provide any additional
rights or benefits to the Secured Parties or that does not adversely affect the
legal rights under the Financing Documents of any Secured Party.

          SECTION  9.5  Headings.  The table of contents and the headings of
                        --------
Sections and Sections have been included in the Security Documents for
convenience only and should not be considered in interpreting the Security
Documents.

          SECTION  9.6  Severability.  Any provision of this Agreement which is
                        ------------
prohibited or unenforceable in any jurisdiction shall not invalidate 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.

          SECTION  9.7  Successors and Assigns.  This Agreement shall be binding
                        ----------------------
upon and inure to the benefit of each of the parties hereto and shall inure to
the benefit of each of the Secured Parties and their respective successors and
assigns, and nothing herein is intended or shall be construed to give any other
Person any right, remedy or claim under, to or in respect of this Agreement or
any Collateral.

          SECTION  9.8  GOVERNING LAW.  THIS AGREEMENT SHALL IN ALL RESPECTS BE
                        -------------
GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

          SECTION  9.9  Counterparts.  This Agreement may be signed in any
                        ------------
number of counterparts with the same effect as if the signatures thereto and
hereto were upon the same instrument.

          SECTION  9.10  SUBMISSION TO JURISDICTION; WAIVERS.
                         -----------------------------------
          (A) EACH PARTY HERETO HEREBY IRREVOCABLY AND UNCONDITIONALLY:

          (I) SUBMITS FOR ITSELF AND ITS PROPERTY IN ANY LEGAL ACTION OR
     PROCEEDING RELATING TO THIS AGREEMENT, ANY SECURITY DOCUMENTS OR ANY OTHER
     DOCUMENTS EXECUTED IN RELATION TO THIS AGREEMENT, OR FOR RECOGNITION AND
     ENFORCEMENT OF ANY JUDGMENT IN RESPECT THEREOF, TO THE
<PAGE>
 
                                                                              25

     EXCLUSIVE GENERAL JURISDICTION OF THE COURTS OF THE STATE OF NEW YORK, THE
     COURTS OF THE UNITED STATES OF AMERICA FOR THE SOUTHERN DISTRICT OF NEW
     YORK, AND APPELLATE COURTS FROM ANY THEREOF;

          (II) 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
     PROCEEDING WAS BROUGHT IN AN INCONVENIENT COURT AND AGREES NOT TO PLEAD OR
     CLAIM THE SAME;

          (III)  AGREES THAT SERVICE OF PROCESS IN ANY SUCH LEGAL ACTION OR
     PROCEEDING MAY BE EFFECTED BY MAILING OF A COPY THEREOF (BY REGISTERED OR
     CERTIFIED MAIL OR ANY SUBSTANTIALLY SIMILAR FORM OF MAIL) POSTAGE PREPAID,
     TO THE COMPANY, AT ITS ADDRESS SET FORTH IN SCHEDULE I OR AT SUCH OTHER
     ADDRESS OF WHICH THE COLLATERAL AGENT AND THE SECURED PARTIES SHALL HAVE
     BEEN NOTIFIED PURSUANT THERETO;

          (IV) AGREES THAT NOTHING HEREIN SHALL AFFECT ANY PARTY'S 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

          (V) 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 SUBSECTION ANY SPECIAL EXEMPLARY, PUNITIVE OR CONSEQUENTIAL
     DAMAGES.

          (B) EACH PARTY HERETO HEREBY WAIVES TRIAL BY JURY TO THE EXTENT
PERMITTED BY LAW IN ANY ACTION OR PROCEEDING REFERRED TO IN SUBSECTION 9.10(A)
HEREOF, AND FOR ANY COUNTERCLAIM THEREIN.

          SECTION  9.11  Termination.  (a)  Upon (i) the earlier of (A) receipt
                         -----------
by the Collateral Agent from each Secured Parties' Representative of a written
direction to cause the liens created by the Security Documents to be released
and discharged or (B) payment in full of all Obligations and the termination of
all Commitments, and (ii) payment in full of all fees and expenses owing to the
Collateral Agent hereunder, the security interests created by the Security
Documents shall terminate forthwith and all right, title and interest of the
Collateral Agent in and to the Collateral shall revert to the Borrower and its
successors and assigns.
<PAGE>
 
                                                                              26

          (b)  Upon the termination of the Collateral Agent's security interest
and the release of the Collateral in accordance with this Section 9.11, the
Collateral Agent will promptly, at the written request and expense of the
Borrower, (i) execute and deliver to the Borrower such documents as the Borrower
shall reasonably request to evidence the termination of such security interest
or the release of the Collateral and (ii) deliver or cause to be delivered to
the Borrower all property of the Loan Parties then held by the Collateral Agent
or any agent or nominee thereof.

          (c) This Agreement shall terminate when the security interest granted
under the Security Documents has terminated and the Collateral has been
released; provided that the provisions of Sections, 6.7, 6.8 and 6.9 shall not
be affected by any such termination.

          SECTION  9.12  Acknowledgments.  Each Loan Party hereby acknowledges
                         ---------------
that it has been advised by counsel in the negotiation, execution and delivery
of this Agreement and the other Financing Documents to which such Loan Party is
a party;  neither the Collateral Agent, any Secured Parties' Representative, nor
any Secured Party has any fiduciary relationship to any Loan Party and the
relationship between the Collateral Agent, any Secured Parties' Representative
and the Secured Parties, on one hand, and the Loan Parties, on the other hand,
is solely that of debtor and creditor; and  no joint venture exists among the
Secured Parties or among any Loan Party and the Secured Parties.
<PAGE>
 
          IN WITNESS WHEREOF, the parties have caused this Agreement to be duly
executed as of the date first written above.
                                    UNITED STATES TRUST COMPANY OF NEW
                                    YORK, as Collateral Agent


                                    By: _________________________________
                                         Name:
                                         Title:


                                    EDISON MISSION HOLDINGS CO.


                                    By: _________________________________
                                         Name:
                                         Title:


                                    EDISON MISSION FINANCE CO.


                                    By: _________________________________
                                         Name:
                                         Title:


                                    HOMER CITY PROPERTY HOLDINGS, INC.


                                    By: _________________________________
                                         Name:
                                         Title:


                                    CHESTNUT RIDGE ENERGY CO.


                                    By: _________________________________
                                         Name:
                                         Title:
<PAGE>
 
                                                                              28

                                    MISSION ENERGY WESTSIDE, INC.


                                    By:________________________________________
                                         Name:                                
                                         Title:


                                    EME HOMER CITY GENERATION L.P.


                                    By: Mission Energy Westside, Inc.,
                                    its General Partner


                                    By:________________________________________
                                         Name:                                
                                         Title:


                                    CITICORP USA, INC., as Administrative Agent


                                    By:________________________________________
                                         Name:                                
                                         Title:
<PAGE>
 
                                                                      SCHEDULE 1
                                                                      ----------

                             Addresses for Notices
                             ---------------------
 
 
Edison Mission Holding Co.                     18101 Von Karman Avenue
Edison Mission Finance Co.                     Suite 1700
Homer City Property Holdings, Inc.             Irvine, California 92612-1046
Chestnut Ridge Energy Co.
Mission Energy Westside, Inc.                  Fax:  (949) 752-5624
EME Homer City Generation L.P.

United States Trust Company of New York        114 West 47th Street
                                               25th floor
                                               New York, New York 10036-1532  
                                               Fax:  (212) 852-1625            
<PAGE>
 
                                                                      EXHIBIT A
                                                                      --------- 

                        [FORM OF SENIOR DEBT SUPPLEMENT]


                                                                          [Date]


United States Trust Company of New York
114 West 47th Street
25th Floor
New York, New York 10036-1532

              Re:  Edison Mission Holdings Co.
                   --------------------------

Ladies and Gentlemen:

          Reference is made to the Collateral Agency and Intercreditor
Agreement, dated as of March 18, 1999 (as the same may be amended, supplemented
or otherwise modified from time to time, the "Collateral Agency and
                                              ---------------------
Intercreditor Agreement"), among Edison Mission Holdings Co. (the "Borrower"),
- -----------------------                                            -------- 
the other Loan Parties, Citicorp USA, Inc., as Administrative Agent, the Secured
Parties' Representatives parties thereto and United States Trust Company of New
York, as Collateral Agent. Capitalized terms used herein and not otherwise
defined shall have the meanings assigned thereto in the Collateral Agency and
Intercreditor Agreement.

          The undersigned is the duly appointed [specify capacity, e.g.,
indenture trustee] for the holders of the [specify class of Senior Debt] who
intend to extend credit to the Borrower on substantially the terms and
conditions set forth in the agreements and other instruments attached hereto as
Annex A. The undersigned hereby requests (i) that the undersigned be recognized
as a "Secured Parties' representative" acting on behalf of the holders of such
Senior Debt for all purposes of the Collateral Agency and Intercreditor
Agreement and (ii) that the attached agreements and instruments be designated as
Financing Documents under the Collateral Agency and Intercreditor Agreement. By
its execution and delivery of this letter, the undersigned agrees on its own
behalf and on behalf of all holders of such Senior Debt to be
<PAGE>
 
                                                                               2
bound by all of the terms of the Collateral Agency and Intercreditor Agreement
and the other Security Documents.

                                       [NAME OF SECURED PARTIES' REPRESENTATIVE]


                                       By:
                                             Name:
                                             Title:


                                       By:
                                             Name:
                                             Title:


ACCEPTED AND AGREED:

EDISON MISSION HOLDINGS CO.


By:
      Name:
      Title:


UNITED STATES TRUST COMPANY OF NEW YORK, as Collateral Agent


By:
      Name:
      Title:

<PAGE>
 
                                                                   EXHIBIT 10.58

                                                                  EXECUTION COPY
                           SECURITY DEPOSIT AGREEMENT

                                     Among

                          EDISON MISSION HOLDINGS CO.,
                          EDISON MISSION FINANCE CO.,
                      HOMER CITY PROPERTY HOLDINGS, INC.,
                           CHESTNUT RIDGE ENERGY CO.,
                         MISSION ENERGY WESTSIDE, INC.,
                         EME HOMER CITY GENERATION L.P.

                                      and

                    UNITED STATES TRUST COMPANY OF NEW YORK

                              as Collateral Agent

                           Dated as of March 18, 1999
<PAGE>
 
                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                                         Page
                                                                                         ----
ARTICLE I
<S>                                                                                       <C>

     Definitions........................................................................   3
     SECTION 1.1. Defined Terms.........................................................   3
     SECTION 1.2. Other Definitional Provisions.........................................  16

ARTICLE II

     Agreement of Collateral Agent; Creation of Accounts; Grant of
          Security Interests............................................................  16
     SECTION 2.1.  Agreement of Collateral Agent........................................  16
     SECTION 2.2.  Creation of Accounts.................................................  17
     SECTION 2.3.  Delivery of Revenues, etc. to Collateral Agent.......................  19
     SECTION 2.4.  Security Interests...................................................  20

ARTICLE III

     Deposits into Accounts.............................................................  22
     SECTION 3.1.  Revenue Account......................................................  22
     SECTION 3.2.  Environmental Capital Expenditure Account............................  22
     SECTION 3.3.  Recovery Event Proceeds Account......................................  22
     SECTION 3.4.  Loan Principal Account...............................................  22
     SECTION 3.5.  Debt Service Reserve Accounts........................................  23
     SECTION 3.6.  Deposits Irrevocable.................................................  23

ARTICLE IV

     Transfers from Accounts............................................................  23
     SECTION 4.1.  Revenue Account......................................................  23
     SECTION 4.2.  [Reserved]...........................................................  24
     SECTION 4.3.  Environmental Capital Expenditure Account............................  24
     SECTION 4.4.  Recovery Event Proceeds Account......................................  25
     SECTION 4.5.  Loan Principal and Accrued Interest Accounts.........................  25
     SECTION 4.6.  Refinancing Indebtedness Principal and Accrued Interest Accounts.....  26
     SECTION 4.7.  Ordinary Course Letter of Credit Indebtedness Principal and Accrued
          Interest Accounts.............................................................  26
     SECTION 4.8.  DSR Letter of Credit Indebtedness Principal and Accrued Interest
          Accounts......................................................................  26
     SECTION 4.9.  Additional Indebtedness Principal and Accrued Interest Accounts......  27

</TABLE>
                                      -i-
<PAGE>

<TABLE>
<CAPTION>
                                                                                      Page
                                                                                      ---- 
<S>                                                                                    <C>
     SECTION 4.10.  Swap Indebtedness Termination Payment and Accrued Fixed Payment
          Accounts...................................................................  27
     SECTION 4.11.  Equity Account...................................................  28
     SECTION 4.12.  Delivery of Request Letters......................................  28
     SECTION 4.13.  Shortfall Notices................................................  28
     SECTION 4.14.  Transfers from Accounts During a Default Period..................  28
     SECTION 4.15.  Collateral Agent's Calculations..................................  29
     SECTION 4.16.  Insufficient Amounts.............................................  29

ARTICLE V

     Investment......................................................................  30

ARTICLE VI

     Collateral Agent................................................................  31
     SECTION 6.1.  Rights, Duties, etc...............................................  31
     SECTION 6.2.  Resignation or Removal............................................  32

ARTICLE VII

     Determinations..................................................................  32

ARTICLE VIII

     Miscellaneous...................................................................  32
     SECTION 8.1.  Indemnification of Collateral Agent...............................  32
     SECTION 8.2.  Waiver of Right of Set-Off........................................  33
     SECTION 8.3.  Termination.......................................................  33
     SECTION 8.4.  Severability......................................................  33
     SECTION 8.5.  Counterparts......................................................  33
     SECTION 8.6.  Amendments........................................................  33
     SECTION 8.7.  APPLICABLE LAW....................................................  33
     SECTION 8.8.  Notices...........................................................  34
     SECTION 8.9.  Benefit of Security Deposit Agreement.............................  34
</TABLE>
                                     -ii-
<PAGE>
 
                                   RECITALS
                                   --------

          A.  The Borrower has entered into a Credit Agreement, dated as of
March 18, 1999 (as the same may be amended, supplemented or otherwise modified
from time to time, the "Credit Agreement"), with certain financial institutions
                        ----------------   
(collectively, the "Lenders") and Citicorp USA, Inc., as administrative agent
                    -------
for the Lenders (in such capacity, the "Administrative Agent").  
                                        --------------------

          B.  Pursuant to the Credit Agreement, the Lenders have severally 
agreed to make Loans (as defined below) to the Borrower upon the terms and
subject to the conditions set forth therein.

          C.  The Borrower will use the proceeds of the Loans under the Credit
Agreement to make valuable transfers to one or more of the other Loan Parties in
connection with the acquisition by EME Homer City of the Homer City Electric
Generating Station and certain facilities and other assets associated therewith
and ancillary thereto (the "Generating Station"),  certain capital expenditures
                            ------------------
related to the Generating Station and general working capital purposes.

          D.  Under Section 8.2.1(e) of the Credit Agreement, the Borrower is
permitted to incur certain indebtedness for the purpose of refinancing the Loans
and other indebtedness of the Borrower ("Refinancing Indebtedness"); under
                                         ------------------------
Section 8.2.1(d)(i) of the Credit Agreement, the Loan Parties are permitted to
incur certain indebtedness in the form of reimbursement obligations relating to
letters of credit, surety bonds and performance bonds used by the Loan Parties
in the ordinary course of their business ("Ordinary Course Letter of Credit
                                           --------------------------------
Indebtedness"); under Section 8.2.1(d)(ii) of the Credit Agreement, the Borrower
- ------------
is permitted to incur certain indebtedness in the form of reimbursement
obligations relating to Debt Service Reserve Letters of Credit (as defined
below) ("DSR Letter of Credit Indebtedness"); under Section 8.2.1 of the
         ---------------------------------
Credit Agreement, the Borrower is permitted to incur certain additional
indebtedness ("Additional Indebtedness"); and, under Section 8.2.1(b) of the
               -----------------------  
Credit Agreement, the Borrower is permitted to incur certain indebtedness under
Interest Rate Hedging Transactions (as defined below) entered into with respect
to the Loans ("Swap Indebtedness").
               -----------------

          E.  In satisfaction of the requirements of the Lenders and the Secured
Parties providing any Refinancing Indebtedness or Additional Indebtedness, the
Loan Parties desire by this Agreement (as defined below) to provide for the
receipt of Revenues (as defined below) and the application thereof to the
payment of Operating Expenses (as defined below), Debt Service (as defined
below) and other purposes as described herein.

          F.  In order to simplify administration of the common collateral and
to provide for the orderly enforcement of their respective rights, the
Administrative Agent, the Lenders and the other Secured Parties have appointed
the Collateral Agent to serve as their common representative, to be the
beneficiary under any guarantee intended to benefit the Secured Parties and to
hold the liens created, or to be created, under the Financing Documents.
<PAGE>
 
                                                                               2

          G.  Pursuant to the Collateral Agency and Intercreditor Agreement,
dated as of March 18, 1999 (as amended, supplemented or otherwise modified from
time to time, the "Collateral Agency and Intercreditor Agreement", among the
                   ---------------------------------------------
Loan Parties, the Administrative Agent, the Collateral Agent and certain other
parties, the Collateral Agent has agreed to serve as a common collateral agent
for all Secured Parties.

          H.  The Borrower is a member of an affiliated group of companies that
includes each other Loan Party.  The Borrower and the other Loan Parties are
engaged in related businesses, and each Loan Party will derive substantial
direct and indirect benefit from the making of the Loans and the incurrence of
any Refinancing Indebtedness or Additional Indebtedness.

          I.  It is a condition precedent to the obligations of the Lenders to
make their respective Loans to the Borrower under the Credit Agreement that the
Loan Parties shall have executed and delivered this Agreement to the Collateral
Agent for the benefit of the Secured Parties.

          NOW, THEREFORE, in consideration of the foregoing premises and for
other good and valuable consideration, the receipt of which is hereby
acknowledged, each of the parties hereto hereby agrees as follows:

                                   ARTICLE I
                                  
                                  Definitions
                                  -----------

          SECTION 1.1.  Defined Terms.  The following terms shall have the
                        -------------
meanings indicated:

          "Accounts" means all accounts established pursuant to Section 2.2 of
           --------                                             ----------- 
     this Agreement.

          "Accrued Interest Accounts" means, collectively, the Loan Accrued
           -------------------------
     Interest Account, the Refinancing Indebtedness Accrued Interest Accounts,
     the Ordinary Course Letter of Credit Indebtedness Accrued Interest
     Accounts, the DSR Letter of Credit Accrued Interest Accounts, the
     Additional Indebtedness Accrued Interest Accounts and the Swap Indebtedness
     Accrued Fixed Payment Accounts.

          "Accrued Interest Amount" means, as of any date of  calculation, (i)
           -----------------------
     with respect to the Loan Accrued Interest Account, the Loan Accrued
     Interest Amount calculated on such date, (ii) with respect to each
     Refinancing Indebtedness Accrued Interest Account, the Refinancing
     Indebtedness Accrued Interest Amount calculated for such Refinancing
     Indebtedness Accrued Interest Account on such date, (iii) with respect to
     each Ordinary Course Letter of Credit Indebtedness Accrued Interest
     Account, the Ordinary Course Letter of Credit Indebtedness Accrued Interest
     Amount calculated for such Ordinary Course Letter of Credit Indebtedness
     Accrued Interest Account on such date, (iv) with respect to each DSR Letter
     of Credit Indebtedness Accrued Interest Account, the DSR
<PAGE>
 
                                                                               3
     Letter of Credit Indebtedness Accrued Interest Amount calculated for such
     DSR Letter of Credit Indebtedness Accrued Interest Account on such date,
     (v) with respect to each Additional Indebtedness Accrued Interest Account,
     the Additional Indebtedness Accrued Interest Amount calculated for such
     Additional Indebtedness Accrued Interest Account on such date, and (vi)
     with respect to each Swap Indebtedness Accrued Fixed Payment Account, the
     Swap Indebtedness Accrued Fixed Payment Amount calculated for such Swap
     Indebtedness Accrued Fixed Payment Account on such date.  

          "Additional Indebtedness" has the meaning specified in the recitals.
           -----------------------  
     
          "Additional Indebtedness Accrued Interest Accounts" has the meaning
           -------------------------------------------------     
      specified in Section 2.2.

          "Additional Indebtedness Accrued Interest Amount" means, with respect
           ----------------------------------------------- 
     to any Additional Indebtedness Accrued Interest Account, as of any date of
     calculation, an amount sufficient to cause the balance of such Additional
     Indebtedness Accrued Interest Account to equal the sum of (i) all accrued
     and unpaid interest and fees in respect of the related Additional
     Indebtedness on such date, (ii) all amounts in respect of funding losses,
     increased capital costs, taxes, indemnities, costs and expenses associated
     with such Additional Indebtedness due and payable on such date and (iii) if
     the next succeeding Additional Indebtedness Interest Payment Date with
     respect to such Additional Indebtedness will occur prior to the next
     succeeding Monthly Transfer Date, all interest and fees projected to accrue
     in respect of such Additional Indebtedness from the date of calculation to
     but excluding such Additional Indebtedness Interest Payment Date and all
     amounts in respect of funding losses, increased capital costs, taxes,
     indemnities, costs and expenses associated with such Additional
     Indebtedness projected to be due and payable on such Additional
     Indebtedness Interest Payment Date.

          "Additional Indebtedness Debt Service Reserve Accounts" has the
           -----------------------------------------------------
     meaning specified in Section 2.2.
                          -----------
          "Additional Indebtedness Debt Service Reserve Requirement", with
           --------------------------------------------------------
     respect to any Additional Indebtedness, has the meaning ascribed to the
     term "Debt Service Reserve Requirement" in the Financing Documents relating
     to such Additional Indebtedness. 

          "Additional Indebtedness Interest Payment Date" means, with respect to
           ---------------------------------------------
     any Additional Indebtedness, any date on which regularly scheduled
     installments of interest are payable on such Additional Indebtedness.

          "Additional Indebtedness Principal Accounts" has the meaning specified
           ------------------------------------------
     in Section 2.2.
        ----------- 
          "Administrative Agent" has the meaning specified in the recitals.
           --------------------                                   --------
          
          "Affiliate" has the meaning specified in the Credit Agreement.
           --------- 

<PAGE>
 
                                                                               4
          "Agreement" means this Security Deposit Agreement, dated as of March
           ---------
     18, 1999, among the Loan Parties and the Collateral Agent.

          "Authorized Representative" means, relative to any Loan Party, those
           -------------------------
     of its officers and employees whose signatures and incumbency shall have
     been certified by such Loan Party to the Collateral Agent and each Secured
     Parties' Representative.  

          "Borrower" has the meaning specified in the preamble.
           --------                                   --------

          "Borrower Obligations" means (a) the unpaid principal of and interest
           --------------------
     on the Loans, (b) the unpaid principal of and interest on the Refinancing
     Indebtedness, if any, (C) the unpaid principal of and interest on the
     Ordinary Course Letter of Credit Indebtedness, if any, (d) the unpaid
     principal of and interest on the DSR Letter of Credit Indebtedness, if any,
     (e) the unpaid principal of and interest on the Additional Indebtedness, if
     any, (f) the unpaid amount of the Swap Indebtedness, if any, and (g) all
     other obligations and liabilities of the Borrower (including interest
     accruing at the then applicable rate or rates provided in the Financing
     Documents after the maturity of the Loans, Refinancing Indebtedness,
     Ordinary Course Letter of Credit Indebtedness, DSR Letter of Credit
     Indebtedness, Additional Indebtedness and/or Swap Indebtedness, as
     applicable, and interest accruing at the then applicable rate or rates
     provided in the Financing Documents after the filing of any petition in
     bankruptcy, or the commencement of any insolvency, reorganization or like
     proceeding, relating to the Borrower, whether or not a claim for post-
     filing or post-petition interest is allowed in such proceeding) to the
     Secured Parties, whether direct or indirect, absolute or contingent, due or
     to become due, or now existing or hereafter incurred, which may arise
     under, out of, or in connection with, any Financing Document or any other
     document made, delivered or given in connection with any of the foregoing,
     in each case whether on account of principal, interest, reimbursement
     obligations, guarantee obligations, fees, indemnities, costs, expenses or
     otherwise (including all fees and disbursements of counsel to the
     Collateral Agent or to the Secured Parties that are required to be paid by
     the Borrower pursuant to the terms of any Financing Document).

          "Business Day" means any day which is neither a Saturday or Sunday nor
           ------------ 
     a legal holiday on which banks are authorized or required to be closed in
     New York, New York.

          "Business Interruption Insurance Proceeds" means any and all proceeds
           ----------------------------------------
     of any insurance, indemnity, warranty or guaranty payable to or received by
     any Loan Party with respect to the partial or complete interruption of the
     operation of the Generating Station.

          "Chestnut Ridge" has the meaning specified in the preamble.
           --------------                                   -------- 

          "Collateral Agent" has the meaning specified in the preamble.
           ----------------                                   -------- 

          "Collateral Agency and Intercreditor Agreement" has the meaning
           ---------------------------------------------
     specified in the recitals.
                      --------
<PAGE>
 
                                                                               5
          "Construction Term Loans" has the meaning specified in the Credit
           -----------------------
     Agreement.

          "Credit Agreement" has the meaning specified in the recitals. 
           ----------------                                   --------

          "Debt" Service" means, with respect to any Senior Debt, principal (or,
     in the case of Swap Indebtedness, amounts payable on early termination of
     the related Interest Rate Hedging Transaction), interest (or, in the case
     of any Swap Indebtedness, fixed payments in respect of the related Interest
     Rate Hedging Transaction), fees and amounts in respect of funding losses,
     increased capital costs, taxes, indemnities, costs and expenses, in each
     case payable in respect of such Senior Debt.

          "Debt Service Reserve Accounts" means, collectively, the Loan Debt
           -----------------------------
     Service Reserve Account, the Refinancing Indebtedness Debt Service Reserve
     Accounts and the Additional Indebtedness Debt Service Reserve Accounts.

          "Debt Service Reserve Requirements" means the Loan Debt Service
           ---------------------------------
     Reserve Requirement, any Refinancing Indebtedness Debt Service Reserve
     Requirement and any Additional Indebtedness Debt Service Reserve
     Requirement. 

          "Default Period" has the meaning specified in the Collateral
           --------------
     Agency and Intercreditor Agreement.

          "Depositary" means Bank of America NT&SA.
           ----------

          "DSR Credit Instrument" means, with respect to any Senior Debt, a
           ---------------------
     letter of credit, guarantee or other instrument that under the Financing
     Documents relating to such Senior Debt may be delivered to the Collateral
     Agent in total or partial satisfaction of the Debt Service Reserve
     Requirement relating to such Senior Debt. 

          "DSR Letter of Credit Indebtedness" has the meaning specified in the
           ---------------------------------
     recitals. 

          "DSR Letter of Credit Indebtedness Accrued Interest Accounts" has
           -----------------------------------------------------------
     the meaning specified in Section 2.2.
                              -----------
          "DSR Letter of Credit Indebtedness Accrued Interest Amount" means,
           ---------------------------------------------------------   
     with respect to any DSR Letter of Credit Indebtedness Accrued Interest
     Account, as of any date of calculation, an amount sufficient to cause the
     balance of such DSR Letter of Credit Indebtedness Accrued Interest Account
     to equal the sum of (i) all accrued and unpaid interest and fees in respect
     of the related DSR Letter of Credit Indebtedness on such date, (ii) all
     amounts in respect of funding losses, increased capital costs, taxes,
     indemnities, costs and expenses associated with such DSR Letter of Credit
     Indebtedness due and payable on such date and (iii) if the next succeeding
     DSR Letter of Credit Indebtedness Interest Payment Date with respect to
     such DSR Letter of Credit Indebtedness will occur prior to the next
     succeeding Monthly Transfer Date, all interest and fees projected to
<PAGE>
 
                                                                               6
     accrue in respect of such DSR Letter of Credit Indebtedness from the date
     of calculation to but excluding such DSR Letter of Credit Indebtedness
     Interest Payment Date and all amounts in respect of funding losses,
     increased capital costs, taxes, indemnities, costs and expenses associated
     with such DSR Letter of Credit Indebtedness projected to be due and payable
     on such DSR Letter of Credit Indebtedness Interest Payment Date.

          "DSR Letter of Credit Indebtedness Interest Payment Date" means, with
           -------------------------------------------------------  
     respect to any DSR Letter of Credit Indebtedness, any date on which
     regularly scheduled installments of interest are payable on such DSR Letter
     of Credit Indebtedness.

          "DSR Letter of Credit Indebtedness Principal Accounts" has the meaning
           ----------------------------------------------------
     specified in Section 2.2.
                  -----------
          "DSR Letter of Credit Provider" means (i) with respect to the Loans, a
           -----------------------------
     commercial bank or other financial institution the long-term debt
     securities of which are rated "A" or better by S&P and "A2" or better by
     Moody's and (ii) with respect to any other Senior Debt, a commercial bank
     or other financial institution the long-term unsecured debt securities of
     which have at least the ratings specified in the Financing Documents
     relating to such Senior Debt.

          "Edison Mission Finance" has the meaning specified in the preamble.
           ----------------------                                   --------

          "Effective Date" has the meaning ascribed thereto in the Credit
           --------------
     Agreement.

          "EME Credit Support Amount" means, on any Senior Debt Payment Date,
           -------------------------
     the lesser of (a) the aggregate amount available to be drawn on such date
     under the EME Credit Support Guarantee and (b) the product of (i) the
     amount of Debt Service payable on such date with respect to such Senior
     Debt less the funds on deposit in the Accrued Interest Account for such
     Senior Debt times (ii) a fraction, the numerator of which is the aggregate
     Principal Amounts of all Senior Debt on such date and the denominator of
     which is the Principal Amount of such Senior Debt.

          "EME Credit Support Guarantee" means the Credit Support Guarantee,
           ----------------------------
     dated as of March 18, 1999, made by Edison Mission Energy in favor of the
     Collateral Agent.

          "EME Debt Service Reserve Guarantee" means, with respect to the Loans,
           ----------------------------------
     the Debt Service Reserve Guarantee, dated as of March 18, 1999, made by
     Edison Mission Energy in favor of the Collateral Agent and, with respect to
     any other Senior Debt, has the meaning ascribed to the term "EME Debt
     Service Reserve Guarantee" in the Financing Documents relating to such
     Senior Debt.

          "EME Homer City" has the meaning specified in the preamble.
           --------------                                   --------

          "Environmental Capital Expenditure Account" has the meaning specified
           -----------------------------------------
     in Section 2.2.
        ----------- 

<PAGE>
 
                                                                               7
          "Environmental Capital Expenditure Program" means EME Homer City's
           -----------------------------------------
     proposed schedule and budget for the installation of a flue gas
     desulfurization unit and three selective catalytic reduction units in the
     Generating Station, as included in the projections delivered by the
     Borrower pursuant to Section 6.1.6 of the Credit Agreement and as amended
                          -------------
     from time to time.

          "Environmental Capital Expenditures" means capital expenditures in
           ----------------------------------
     furtherance of the Environmental Capital Expenditure Program.

          "Equity Account" has the meaning specified in Section 2.2.
           --------------                               ----------- 

          "Event of Default" means an "Event of Default" under the Credit
           ----------------
     Agreement or any other Financing Document.

          "Excess Net Cash Proceeds" means the Net Cash Proceeds of the
           ------------------------
     Refinancing Indebtedness incurred to refinance the 364-Day Term Loans
     remaining after repayment of the 364-Day Term Loans.

          "Financing Documents" means the Loan Documents and each indenture,
           -------------------
     loan agreement, underwriting agreement, security purchase agreement or
     other document entered into in connection with any Senior Debt.

          "Generating Station" has the meaning specified in the recitals.
           ------------------                                   --------

          "Governmental Authority" means any nation or government, any state,
           ----------------------
     provincial or other political subdivision thereof and any entity exercising
     executive, legislative, judicial, regulatory or administrative functions of
     or pertaining to government.

          "Guarantee and Collateral Agreement" means the Guarantee and
           ----------------------------------   
     Collateral Agreement, dated as of March 18, 1999, made by the Loan Parties
     in favor of the Collateral Agent.

          "Guarantor" means each Loan Party other than the Borrower.
           ---------

          "Guarantor Obligations" means, with respect to any Guarantor, all
           --------------------- 
     obligations and liabilities of such Guarantor which may arise under or in
     connection with the Guarantee and Collateral Agreement or any other
     Financing Document to which such Guarantor is a party, in each case whether
     on account of guarantee obligations, reimbursement obligations, fees,
     indemnities, costs, expenses or otherwise (including all fees and
     disbursements of counsel to the Collateral Agent and to the Secured Parties
     that are required to be paid by such Guarantor pursuant to the terms of any
     Financing Document).

          "Homer City Holdings" has the meaning specified in the preamble.
           -------------------                                   --------
<PAGE>
 
                                                                               8

          "including" means including without limiting the generality of any
           ---------
     description preceding such term, and, for purposes of each Loan Document,
     the parties thereto agree that the rule of ejusdem generis shall not be
                                                ------- -------
     applicable to limit a general statement, which is followed by or referable
     to an enumeration of specific matters, to matters similar to the matters
     specifically mentioned.

          "Intercompany Loan Subordination Agreement" means the Intercompany
           -----------------------------------------
     Loan Subordination Agreement, dated as of March 18, 1999, among the Loan
     Parties and the Collateral Agent.

          "Interest Payment Dates" means Loan Interest Payment Dates,
           ---------------------- 
     Refinancing Indebtedness Interest Payment Dates, Ordinary Course Letter of
     Credit Indebtedness Interest Payment Dates, DSR Letter of Credit
     Indebtedness Interest Payment Dates, Additional Indebtedness Interest
     Payment Dates and Swap Indebtedness Accrued Fixed Payment Dates.

          "Interest Rate Hedging Transactions" means, as to any Person, all
           ----------------------------------
     interest rate swaps, caps or collar agreements or similar arrangements
     entered into by such Person in order to protect against fluctuations in
     interest rates or the exchange of nominal interest obligations, either
     generally or under specific contingencies, and, in any event, not for
     speculative purposes.

          "Lenders" has the meaning specified in the recitals.
           -------                                   --------      

          "Lien" has the meaning specified in the Credit Agreement.
           ----                                         

          "Loan Accrued Interest Account" has the meaning specified in Section
           -----------------------------                               -------  
     2.2.
     --- 

          "Loan Accrued Interest Amount" means, as of any date of calculation,
           ----------------------------
     an amount sufficient to cause the balance of the Loan Accrued Interest
     Account to equal the sum of (i) all accrued and unpaid interest and fees in
     respect of the Loans on the related date, (ii) all amounts in respect of
     funding losses, increased capital costs, taxes, indemnities, costs and
     expenses associated with the Loans due and payable on such date and (iii)
     if the next succeeding Loan Interest Payment Date will occur prior to the
     next succeeding Monthly Transfer Date, all interest and fees projected to
     accrue on the Loans from the date of calculation to but excluding such Loan
     Interest Payment Date and all amounts in respect of funding losses,
     increased capital costs, taxes, indemnities, costs and expenses associated
     with the Loans projected to be due and payable on such Loan Interest
     Payment Date.

          "Loan Debt Service Reserve Account" has the meaning specified in
           ---------------------------------
     Section 2.2.
     ------------

          "Loan Debt Service Reserve Requirement" has the meaning ascribed to
           -------------------------------------
     the term of "Debt Service Reserve Requirement" in the Credit Agreement.

          "Loan Documents" has the meaning specified in the Credit Agreement.
           -------------- 
<PAGE>
 
                                                                               9
          "Loan Interest Payment Date" means any date on which interest or other
           --------------------------
     amounts referred to in the definition of the term "Loan Accrued Interest
     Amount" are scheduled to be payable in accordance with the Credit
     Agreement.

          "Loan Principal Account" has the meaning specified in Section 2.2.
           ----------------------                               -----------

          "Loan Party" has the meaning specified in the preamble.
           ----------                                   --------

          "Loans" has the meaning specified in the Credit Agreement.
           -----          

          "MEW" has the meaning specified in the preamble.
           ---                                   --------

          "Minimum Ratings" means, with respect to any DSR Letter of Credit
           ---------------
     Provider for any Senior Debt, the long-term senior unsecured debt ratings
     specified or referred to in the definition of the term "DSR Letter of
     Credit Provider" applicable to such Senior Debt.

          "Monthly Transfer Date" means the Effective Date and the last Business
           ---------------------
     Day of each month.

          "Moody's" means Moody's Investors Service, Inc.
           -------

          "Net Cash Proceeds" means (a) in connection with any Recovery Event,
           -----------------
     the proceeds thereof in the form of cash and cash equivalents of such
     Recovery Event, net of any expenses reasonably incurred in respect of such
     Recovery Event, including attorneys' fees, amounts required to be applied
     to the repayment of Indebtedness secured by a Lien expressly permitted
     under the Credit Agreement and the other Financing Documents on any asset
     which is the subject of such Recovery Event (other than any Lien pursuant
     to a Security Document) 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), to the extent
     that, in the case of Recovery Events relating to property or casualty
     insurance claims, the amount of such proceeds exceeds $5,000,000 with
     respect to any asset of any Loan Party and (b) in connection with any
     issuance or sale of debt securities, the cash proceeds received from such
     issuance or incurrence, net of attorneys' fees, investment banking fees,
     accountants' fees, underwriting discounts and commissions and other
     customary fees and expenses actually incurred in connection therewith.

          "New York UCC" means the Uniform Commercial Code as from time to time
           ------------
     in effect in the State of New York.

          "Notice of Action" has the meaning specified in the Collateral Agency
           ----------------
     and Intercreditor Agreement.

          "Obligations" means (a) in the case of the Borrower, the Borrower
           -----------
     Obligations, and (b) in the case of any Guarantor, the Guarantor
     Obligations.
<PAGE>
 
                                                                              10
          "Operating Account" has the meaning specified in Section 2.2.
           -----------------                               -----------

          "Operating Expenses" has the meaning ascribed to the term "Operating
           ------------------
     Expenses" in the Credit Agreement and, if applicable, the meaning ascribed
     to the term "Operating Expenses" in the Financing Documents relating to any
     other Senior Debt.

          "Ordinary Course Letter of Credit Indebtedness" has the meaning
           ---------------------------------------------
     specified in the recitals.
                      --------

          "Ordinary Course Letter of Credit Indebtedness Interest Payment Date"
           -------------------------------------------------------------------
     means, with respect to any Ordinary Course Letter of Credit Indebtedness,
     any date on which regularly scheduled installments of interest are payable
     on such Ordinary Course Letter of Credit Indebtedness.

          "Ordinary Course Letter of Credit Indebtedness Accrued Interest
           --------------------------------------------------------------
     Accounts" has the meaning specified in Section 2.2.
     --------                               -----------

          "Ordinary Course Letter of Credit Indebtedness Accrued Interest
           --------------------------------------------------------------
     Amount" means, with respect to any Ordinary Course Letter of Credit
     ------
     Indebtedness Accrued Interest Account, as of any date of calculation, an
     amount sufficient to cause the balance of such Ordinary Course Letter of
     Credit Indebtedness Accrued Interest Account to equal the sum of (i) all
     accrued and unpaid interest and fees in respect of the related Ordinary
     Course Letter of Credit Indebtedness on such date, (ii) all amounts in
     respect of funding losses, increased capital costs, taxes, indemnities,
     costs and expenses associated with such Ordinary Course Letter of Credit
     Indebtedness due and payable on such date and (iii) if the next succeeding
     Ordinary Course Letter of Credit Indebtedness Interest Payment Date with
     respect to such Ordinary Course Letter of Credit Indebtedness will occur
     prior to the next succeeding Monthly Transfer Date, all interest and fees
     projected to accrue in respect of such Ordinary Course Letter of Credit
     Indebtedness from the date of calculation to but excluding such Ordinary
     Course Letter of Credit Indebtedness Interest Payment Date and all amounts
     in respect of funding losses, increased capital costs, taxes, indemnities,
     costs and expenses associated with such Ordinary Course Letter of Credit
     Indebtedness projected to be due and payable on such Ordinary Course Letter
     of Credit Indebtedness Interest Payment Date.

          "Ordinary Course Letter of Credit Indebtedness Principal Accounts" has
           ----------------------------------------------------------------
     the meaning specified in Section 2.2.
                              -----------

          "Organic Document" means, with respect to any Person that is a
           ----------------
     corporation, its certificate of incorporation, its by-laws and all
     shareholder agreements, voting trusts and similar arrangements applicable
     to any of its authorized shares of capital stock, and, with respect to any
     Person that is a limited partnership, its certificate of limited
     partnership and partnership agreement.
<PAGE>
 
                                                                              11
          "Permitted Investments" means investments in securities with
           ---------------------
     maturities of one year or less that are:  (i) direct obligations of the
     United States, or any agency thereof; (ii) obligations fully guaranteed by
     the United States or any agency thereof; (iii) certificates of deposit,
     bankers acceptances or other "money market instruments" issued by
     commercial banks or trust companies (including the Collateral Agent, the
     Depositary or any of their respective affiliates) organized under the laws
     of the United States or any political subdivision thereof or under the laws
     of Canada, Japan, Switzerland or any country that is a member of the
     European Economic Community having a combined capital and surplus of at
     least $250 million and having long-term unsecured debt securities then
     rated "A" or better by S&P or "A2" or better by Moody's (but at the time of
     investment not more than $25,000,000 may be invested in such certificates
     of deposit from any one bank or trust company and its affiliates); (iv)
     repurchase obligations with a term of not more than seven days for
     underlying securities of the types described in clauses (i) and (ii) above,
     entered into with any financial institution meeting the qualifications
     specified in clause (iii) above; (v) open market commercial paper of any
     corporation incorporated or doing business under the laws of the United
     States or of any political subdivision thereof having a rating of at least
     "A-1" from S&P and "P-1" from Moody's (but at the time of investment not
     more than $25,000,000 may be invested in such commercial paper from any one
     corporation); (vi) auction rate securities or money market preferred stock
     having one of the two highest ratings obtainable from either S&P or Moody's
     (or, if at any time neither S&P nor Moody's may be rating such obligations,
     then from another nationally recognized rating service acceptable to the
     Collateral Agent); or (vii) investments in money market funds or money
     market mutual funds sponsored by any securities broker-dealer of recognized
     national standing (or an Affiliate thereof), having an investment policy
     that requires substantially all the invested assets of such fund to be
     invested in investments described in any one or more of the foregoing
     clauses having a rating of "A" or better by S&P or "A2" or better by
     Moody's (including money market funds for which the Collateral Agent or the
     Depositary in their respective individual capacities or any of their
     respective affiliates is investment manager or adviser).

          "Person" means any natural person, corporation, partnership, limited
           ------
     liability company, firm, association, trust, government, governmental
     agency or any other entity, whether acting in an individual, fiduciary or
     other capacity.

          "Principal Accounts" means the Loan Principal Account, the Refinancing
           ------------------
     Indebtedness Principal Accounts, the Ordinary Course Letter of Credit
     Indebtedness Principal Accounts, the DSR Letter of Credit Indebtedness
     Principal Accounts, the Additional Indebtedness Principal Accounts and the
     Swap Indebtedness Termination Payment Accounts.

          "Principal Amount" means, at any time, (u) in the case of the Loans,
           ----------------
     the Commitments at such time, (v) in the case of any class of Refinancing
     Indebtedness, the aggregate principal amount of such class of Refinancing
     Indebtedness outstanding at such time, (w) in the case of any class of
     Additional Indebtedness, the aggregate principal amount of such class of
     Additional Indebtedness outstanding at such time, (x) in the case
<PAGE>
 
                                                                              12

     of any class of DSR Letter of Credit Indebtedness, the commitments with
     respect thereto at such time, (y) in the case of any class of Ordinary
     Course Letter of Credit Indebtedness, the commitments with respect thereto
     at such time and (z) in the case of any class of Swap Indebtedness, (i)
     prior to the occurrence of an Event of Default, zero, and (ii) after the
     occurrence of an Event of Default, the termination value of the related
     Interest Rate Hedging Transaction.

          "Proceeds" has the meaning specified in the New York UCC, and, in any
           --------
     event, includes Recovery Event Proceeds and Business Interruption Insurance
     Proceeds.

          "Prudent Industry Practice" means, at a particular time, (a) any of
           -------------------------
     the practices, methods and acts engaged in or approved by a significant
     portion of the competitive electric generating industry at such time, or
     (b) with respect to any matter to which clause (a) does not apply, any of
     the practices, methods and acts which, in the exercise of reasonable
     judgment at the time the decision was made, could have been expected to
     accomplish the desired result at a reasonable cost consistent with good
     business practices, reliability, safety and expedition.  "Prudent Industry
     Practice" is not intended to be limited to the optimum practice, method or
     act to the exclusion of all others, but rather to be a spectrum of possible
     practices, methods or acts having due regard for, among other things,
     manufacturers' warranties and the requirements of any Governmental
     Authority of competent jurisdiction.

          "Quarterly Payment Date" means the first Business Day of each January,
           ----------------------
     April, July and October.

          "Recovery Event" means any settlement of or payment of $5,000,000 or
           --------------
     more in respect of (a) any property or casualty insurance claim relating to
     any asset of any Loan Party or (b) any seizure, condemnation, confiscation
     or taking of, or requisition of title or use of, the Generating Station or
     any part thereof by any Governmental Authority.

          "Recovery Event Proceeds" means proceeds received in respect of a
           -----------------------
     Recovery Event.

          "Recovery Event Proceeds Account" has the meaning specified in Section
           -------------------------------                               -------
     2.2.
     ---

          "Refinancing Indebtedness" has the meaning specified in the recitals.
           ------------------------                                   --------

          "Refinancing Indebtedness Accrued Interest Accounts" has the meaning
     specified in Section 2.2.
                  -----------

          "Refinancing Indebtedness Accrued Interest Amount" means, with respect
           ------------------------------------------------
     to any Refinancing Indebtedness Accrued Interest Account, as of any date of
     calculation, an amount sufficient to cause the balance of such Refinancing
     Indebtedness Accrued Interest Account to equal the sum of (i) all accrued
     and unpaid interest and fees in respect of the related Refinancing
     Indebtedness on such date, (ii) all amounts in respect of funding
<PAGE>
 
                                                                              13

     losses, increased capital costs, taxes, indemnities, costs and expenses
     associated with such Refinancing Indebtedness due and payable on such date
     and (iii) if the next succeeding Refinancing Indebtedness Interest Payment
     Date with respect to such Refinancing Indebtedness will occur prior to the
     next succeeding Monthly Transfer Date, all interest and fees projected to
     accrue in respect of such Refinancing Indebtedness from the date of
     calculation to but excluding such Refinancing Indebtedness Interest Payment
     Date and all amounts in respect of funding losses, increased capital costs,
     taxes, indemnities, costs and expenses associated with such Refinancing
     Indebtedness projected to be due and payable on such Refinancing
     Indebtedness Interest Payment Date.

          "Refinancing Indebtedness Debt Service Reserve Accounts" has the
           ------------------------------------------------------
     meaning specified in Section 2.2.
                          -----------

          "Refinancing Indebtedness Debt Service Reserve Requirement", with
           ---------------------------------------------------------
     respect to any Refinancing Indebtedness, has the meaning ascribed to the
     term "Debt Service Reserve Requirement" in the Financing Documents relating
     to such Refinancing Indebtedness.

          "Refinancing Indebtedness Interest Payment Date" means, with respect
           ---------------------------------------------- 
     to any Refinancing Indebtedness, any date on which regularly scheduled
     installments of interest are payable on such Refinancing Indebtedness.

          "Refinancing Indebtedness Principal Accounts" has the meaning
           -------------------------------------------
     specified in Section 2.2.
                  -----------

          "Request Letter" means each letter from time to time delivered by an
           --------------
     Authorized Representative of any Loan Party to the Collateral Agent
     requesting the transfer and/or release of funds from one or more Accounts
     to or on behalf of any Loan Party in accordance with the terms of this
     Security Deposit Agreement, each such letter to be in such form acceptable
     to the Borrower, the Collateral Agent and the Secured Parties'
     Representatives.

          "Required Secured Parties" has the meaning specified in the Collateral
           ------------------------
     Agency and Intercreditor Agreement.

          "Restoration" means the replacement or restoration of any asset or
           -----------
     assets in respect of which any Loan Party has received Recovery Event
     Proceeds.

          "Restricted Payment Date" means (i) in the case of any Restricted
           -----------------------
     Payment being made exclusively with the proceeds of Indebtedness incurred
     pursuant to Section 8.2.1(e) of the Credit Agreement remaining after
                 ----------------
     repayment in full of the 364-Day Term Loans, any Business Day specified by
     the Borrower in a Request Letter, and (ii) in the case of any other
     Restricted Payment, any Quarterly Payment Date.
<PAGE>
 
                                                                              14
          "Restricted Payments" has the meaning ascribed to the term "Restricted
           -------------------   
     Payments" in the Credit Agreement and, if applicable, the meaning ascribed
     to the term "Restricted Payments" in the Financing Documents relating to
     any other Senior Debt.  

          "Revenue Account" has the meaning specified in Section 2.2.
           ---------------                               -----------

          "Revenues" means, in respect of any period, all cash amounts received
           --------
     by the Loan Parties during such period, including revenues from the sale of
     energy and capacity, Business Interruption Insurance Proceeds, Excess Net
     Cash Proceeds and all interest and other income earned on amounts in the
     Accounts but excluding Recovery Event Proceeds. 

          "Revolving Loans" has the meaning specified in the Credit Agreement.
           --------------- 

          "S&P" means Standard & Poor's Rating Group.
           ---

          "Secured Parties" has the meaning specified in the Collateral Agency
           ---------------
     and Intercreditor Agreement.

          "Secured Parties' Representative" means the Administrative Agent and
           -------------------------------
     each Person that serves as indenture trustee, collateral agent, lenders'
     representative or in any similar capacity for Persons that provide any
     Senior Debt.

          "Securities Intermediary" has the meaning specified in Section 2.5.
           -----------------------                               -----------

          "Security Documents" means (a) the Guarantee and Collateral Agreement,
           ------------------
     the Mortgage and Security Agreement, the Intercompany Loan Subordination
     Agreement, the Collateral Agency and Intercreditor Agreement, the Security
     Deposit Agreement, (b) the Consent to Assignment, if delivered, and (c) the
     EME Credit Support Guarantee and any other agreement or instrument
     hereafter entered into by the Borrower or any other Person which guarantees
     or secures payment of any Senior Debt.

          "Senior Debt" means the Loans, any Refinancing Indebtedness, any
           -----------
     Ordinary Course Letter of Credit Indebtedness, any DSR Letter of Credit
     Indebtedness, any Additional Indebtedness and any Swap Indebtedness.

          "Senior Debt Payment Date" means each date on which any Debt Service
           ------------------------
     in respect of any Senior Debt is due and payable.

          "Swap Indebtedness" has the meaning specified in the recitals.
           -----------------                                   --------

          "Swap Indebtedness Accrued Fixed Payment Accounts" has the meaning
           ------------------------------------------------
     specified in Section 2.2.
                  -----------  

          "Swap Indebtedness Accrued Fixed Payment Amount" means, with respect
           ---------------------------------------------- 
     to any Swap Indebtedness Accrued Fixed Payment Account, as of any date of
     calculation, an
<PAGE>
 
                                                                              15

     amount sufficient to cause the balance of such Swap Indebtedness Accrued
     Fixed Payment Account to equal the sum of (i) all accrued and unpaid
     amounts in respect of the related Swap Indebtedness on such date and (ii)
     if the next succeeding Swap Indebtedness Accrued Fixed Payment Date with
     respect to such Swap Indebtedness will occur prior to the next succeeding
     Monthly Transfer Date, all amounts projected to accrue in respect of such
     Swap Indebtedness from the date of calculation to but excluding such Swap
     Indebtedness Accrued Fixed Payment Date.

          "Swap Indebtedness Accrued Fixed Payment Date" means, with respect to
           --------------------------------------------
     any Swap Indebtedness, any date on which regularly scheduled amounts are
     payable on such Swap Indebtedness.

          "Swap Indebtedness Termination Payment Accounts" has the meaning
           ----------------------------------------------
     specified in Section 2.2.
                  -----------

          " 364-Day Term Loans " has the meaning ascribed thereto in the Credit
            ------------------
     Agreement.

          SECTION 1.2. Other Definitional Provisions.  (a)  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, appendix and exhibit references are to
this Agreement unless otherwise specified.

          (b)  Each reference in this Agreement to a Financing Document or other
agreement shall be deemed to refer to such Financing Document or other agreement
as the same may be amended, supplemented or otherwise modified from time to
time.

          (c)  Any term defined by reference to an agreement, instrument or
other document shall have the meaning so assigned to it whether or not such
agreement, instrument or document is in effect.

          (d)  Each reference in this Agreement to a Person shall be deemed to
include such Person's successors and assigns.

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

                                   ARTICLE II

                         Agreement of Collateral Agent;
                         ------------------------------
                             Creation of Accounts;
                             ---------------------
                          Grant of  Security Interests
                          ----------------------------

          SECTION 2.1.  Agreement of Collateral Agent.  The Collateral Agent
                        -----------------------------
agrees to accept all cash, cash equivalents, instruments, investments and other
securities to be delivered to or held by the Collateral Agent pursuant to the
terms of this Agreement, and, from such cash,
<PAGE>
 
                                                                              16
cash equivalents, instruments, investments and other securities, to make the
releases and transfers contemplated by this Agreement as and when required in
accordance with the terms hereof.  The Collateral Agent shall hold and safeguard
the Accounts (other than the Operating Account) (and the cash, cash equivalents,
instruments, investments and other securities on deposit therein) during the
term of this Agreement and shall treat the cash, cash equivalents, instruments,
investments and other securities in such Accounts as pledged by the Loan Parties
to the Secured Parties, to be held by the Collateral Agent, as agent of the
Secured Parties, in trust in accordance with the provisions hereof and of the
Collateral Agency and Intercreditor Agreement.

          SECTION 2.2.  Creation of Accounts.  (a)  On or prior to the Effective
                        --------------------
Date, (i) the Collateral Agent shall establish in its corporate trust department
a special, segregated and irrevocable trust account designated the "Homer City
Revenue Account" (the "Revenue Account") and (ii) the Borrower shall establish
                       --------------- 
with the Depositary a special and segregated account designated the "EME Homer
City Generation L.P. Operating Account" (the "Operating Account").
                                              ----------------- 

          (b)  Within 10 Business Days after the Effective Date, the Collateral
Agent shall establish in its corporate trust department special, segregated and
irrevocable trust accounts as follows:

               (i) one designated the "Homer City Environmental Capital
     Expenditure Account" (the "Environmental Capital Expenditure Account");
                                -----------------------------------------

               (ii) one designated the "Homer City Recovery Event Proceeds
     Account" (the "Recovery Event Proceeds Account");
                    -------------------------------

               (iii) one designated the "Homer City Loan Accrued Interest
     Account" (the "Loan Accrued Interest Account");
                    -----------------------------

               (iv) one designated the "Homer City Loan Principal Account" (the
     "Loan Principal Account");
      ---------------------- 
       
               (v) one designated the "Homer City Loan Debt Service Reserve
     Account" (the "Loan Debt Service Reserve Account"); and
                    ---------------------------------

               (vi)  one designated the "Homer City Equity Account" (the "Equity
                                                                          ------
     Account").
     -------

          (c)  On or prior to the date of incurrence of each class of
Refinancing Indebtedness, the Collateral Agent shall establish in its corporate
trust department special, segregated and irrevocable trust accounts as follows:

          (i)  one designated the "Homer City Refinancing Indebtedness (Class  )
                                                                             --
     Accrued Interest Account" (such account, together with each other such 
     account established in connection with the incurrence of each other class
     of Refinancing Indebtedness, collectively, the "Refinancing Indebtedness
                                                     ------------------------   
     Accrued Interest Accounts");
     -------------------------
<PAGE>
 
                                                                              17

          (ii) one designated the "Homer City Refinancing Indebtedness (Class  )
                                                                             --
     Principal Account" (such account, together with each other such account
     established in connection with the incurrence of each other class of
     Refinancing Indebtedness, collectively, the "Refinancing Indebtedness
                                                  ------------------------
     Principal Accounts"); and
     ------------------

          (iii) one designated the "Homer City Refinancing Indebtedness (Class
       ) Debt Service Reserve Account" (such account, together with each other 
     --
     such account established in connection with the incurrence of each other
     class of Refinancing Indebtedness, collectively, the "Refinancing
                                                           -----------
     Indebtedness Debt Service Reserve Accounts").
     ------------------------------------------

          (d)  On or prior to the date of incurrence of each class of Ordinary
Course Letter of Credit Indebtedness, the Collateral Agent shall establish in
its corporate trust department special, segregated and irrevocable trust
accounts as follows:

          (i) one designated the "Homer City Ordinary Course Letter of Credit
     Indebtedness (Class  ) Accrued Interest Account" (such account, together
                        --
     with each other such account established in connection with the incurrence
     of each other class of Ordinary Course Letter of Credit Indebtedness,
     collectively, the "Ordinary Course Letter of Credit Indebtedness Accrued
                        -----------------------------------------------------  
     Interest Accounts"); and
     -----------------

          (ii) one designated the "Homer City Ordinary Course Letter of Credit
     Indebtedness (Class  ) Principal Account" (such account, together with
                        --
     each other such account established in connection with the incurrence of
     each other class of Ordinary Course Letter of Credit Indebtedness,
     collectively, the "Ordinary Course Letter of Credit Indebtedness Principal
                        -------------------------------------------------------
     Accounts").
     -------- 

          (e)  On or prior to the date of incurrence of each class of DSR Letter
of Credit Indebtedness, the Collateral Agent shall establish in its corporate
trust department special, segregated and irrevocable trust accounts as follows:

          (i) one designated the "Homer City Debt Service Reserve Letter of
     Credit Indebtedness (Class  ) Accrued Interest Account") (such account,
                               --
     together with each other such account established in connection with the
     incurrence of each other class of DSR Letter of Credit Indebtedness,
     collectively, the "DSR Letter of Credit Indebtedness Accrued Interest
                        --------------------------------------------------
     Accounts"); and
     --------

          (ii) one designated the "Homer City DSR Letter of Credit Indebtedness
     (Class  ) Principal Account" (such account, together with each other such
           --
     account established in connection with the incurrence of each other class
     of DSR Letter of Credit Indebtedness, collectively, the "DSR Letter of
                                                              -------------
     Credit Indebtedness Principal Accounts").
     --------------------------------------

          (f)  On or prior to the date of incurrence of each class of Additional
Indebtedness, the Collateral Agent shall establish in its corporate trust
department special, segregated and irrevocable trust accounts as follows:
<PAGE>
 
                                                                              18
          (i) one designated the "Homer City Additional Indebtedness (Class  )
                                                                           --
     Accrued Interest Account" (such account, together with each other account
     established in connection with the incurrence of each other class of
     Additional Indebtedness, collectively, the "Additional Indebtedness Accrued
                                                 -------------------------------
     Interest Accounts");
     -----------------
          
          (ii) one designated the "Homer City Additional Indebtedness (Class  )
                                                                            --
     Principal Account" (such account, together with each other such account 
     established in connection with the incurrence of each other class of
     Additional Indebtedness, collectively, the "Additional Indebtedness 
                                                 -----------------------
     Principal Accounts"); and
     ------------------

          (iii) if applicable, one designated the "Homer City Additional
     Indebtedness (Class  ) Debt Service Reserve Account" (such account,
                        --
     together with each other account established in connection with the
     incurrence of each other class of Additional Indebtedness, collectively,
     the "Additional Indebtedness Debt Service Reserve Accounts").
          -----------------------------------------------------

          (g)  On or prior to the date of incurrence of each class of Swap
Indebtedness, the Collateral Agent shall establish in its corporate trust
department special, segregated and irrevocable trust accounts as follows:

          (i) one designated the "Homer City Swap Indebtedness (Class  )
                                                                     --
     Accrued Fixed Payment Amount Account" (such account, together with each
     other such account established in connection with the incurrence of each
     other class of Swap Indebtedness, collectively, the "Swap Indebtedness
                                                          -----------------
     Accrued Fixed Payment Accounts"); and
     ------------------------------

          (ii) one designated the "Homer City Swap Indebtedness (Class  )
                                                                      --
     Termination Payment Account" (such account, together with each other
     account established in connection with the incurrence of each other class
     of Swap Indebtedness, collectively, the "Swap Indebtedness Termination
                                              -----------------------------  
     Payment Accounts").
     ----------------

          SECTION 2.3.  Delivery of Revenues, etc. to Collateral Agent.  Each
                        ----------------------------------------------
Loan Party shall cause all Revenues and all cash, cash equivalents, instruments,
investments and other securities in its possession (excluding amounts received
by such Loan Party as transfers from the Operating Account, the Environmental
Capital Expenditures Account or the Equity Account in accordance with this
Agreement) to be delivered immediately to the Collateral Agent for deposit into
the Accounts pursuant to Article III.  All such Revenues, cash, cash
equivalents, instruments, investments and other securities at any time on
deposit in the Accounts shall be held in the exclusive custody of the Collateral
Agent for the purposes and on the terms set forth in this Agreement.

          SECTION 2.4.  Security Interests.  In order to secure the payment of
                        ------------------
the Obligations, and the performance and observance by the Loan Parties of all
of their respective covenants, agreements and obligations to the Secured Parties
under the Financing Documents, each Loan Party hereby pledges and assigns to the
Collateral Agent, and creates in favor of the Collateral Agent: (a) for the
benefit of the Secured Parties, a security interest in all of such Loan
<PAGE>
 
                                                                              19
Party's right, title and interest, whether now owned or hereafter acquired and
whether now existing or hereafter coming into existence, in, to and under this
Agreement and in and to all Revenues and each of the Accounts (except as
otherwise provided in clauses (b), (c), (d), (e), (f) and (g) of this Section
2.4) and all cash, cash equivalents, instruments, investments and other
securities on deposit therein and all Proceeds of the foregoing; (b) for the
exclusive benefit of the Lenders, a security interest in all of such Loan
Party's right, title and interest, whether now owned or hereafter acquired and
whether now existing or hereafter coming into existence, in and to the Loan
Accrued Interest Account, the Loan Principal Account, the Loan Debt Service
Reserve Account and the Environmental Capital Expenditures Account and all cash,
cash equivalents, instruments, investments and other securities on deposit
therein and all Proceeds of the foregoing; (c) for the exclusive benefit of the
Persons that provide each class of Refinancing Indebtedness, a security interest
in all of such Loan Party's right, title and interest, whether now owned or
hereafter acquired and whether now existing or hereafter coming into existence,
in and to the Refinancing Indebtedness Accrued Interest Account, the Refinancing
Indebtedness Principal Account and the Refinancing Indebtedness Debt Service
Reserve Account related to such class of Refinancing Indebtedness, and all cash,
cash equivalents, instruments, investments and other securities on deposit
therein and all Proceeds of the foregoing; (d) for the exclusive benefit of the
Persons that provide each class of Ordinary Course Letter of Credit
Indebtedness, a security interest in all of such Loan Party's right, title and
interest, whether now owned or hereafter acquired and whether now existing or
hereafter coming into existence, in and to the Ordinary Course Letter of Credit
Indebtedness Accrued Interest Account and the Ordinary Course Letter of Credit
Indebtedness Principal Account related to such class of Ordinary Course Letter
of Credit Indebtedness and all cash, cash equivalents, instruments, investments
and other securities on deposit therein and all Proceeds of the foregoing; (e)
for the exclusive benefit of the Persons that provide each class of DSR Letter
of Credit Indebtedness, a security interest in all of such Loan Party's right,
title and interest, whether now owned or hereafter acquired and whether now
existing or hereafter coming into existence, in and to the DSR Letter of Credit
Indebtedness Accrued Interest Account and the DSR Letter of Credit Indebtedness
Principal Account related to such class of DSR Letter of Credit Indebtedness and
all cash, cash equivalents, instruments, investments and other securities on
deposit therein and all Proceeds of the foregoing; (f) for the exclusive benefit
of the Persons that provide each class of Additional Indebtedness, a security
interest in all of such Loan Party's right, title and interest, whether now
owned or hereafter acquired and whether now existing or hereafter coming into
existence, in and to the Additional Indebtedness Accrued Interest Account, the
Additional Indebtedness Principal Account and the Additional Indebtedness Debt
Service Reserve Account related to such class of Additional Indebtedness and all
cash, cash equivalents, instruments, investments and other securities on deposit
therein and all Proceeds of the foregoing; and (g) for the exclusive benefit of
the Persons that provide each class of Swap Indebtedness, a security interest in
all of such Loan Party's right, title and interest, whether now owned or
hereafter acquired and whether now existing or hereafter coming into existence,
in and to the Swap Indebtedness Accrued Fixed Payment Account and the Swap
Indebtedness Termination Payment Account related to such class of Swap
Indebtedness and all cash, cash equivalents, instruments, investments and other
securities on deposit therein and all Proceeds of the foregoing.  The Accounts
(other than the Operating Account) and all cash, cash equivalents, instruments,
investments and other securities on deposit therein shall, subject to the
provisions of this Agreement and the Security Documents, be subject to the
exclusive dominion
<PAGE>
 
                                                                              20

and control of the Collateral Agent, and the Collateral Agent shall have the
sole and exclusive right to withdraw or order a transfer of funds from such
Accounts, and each Loan Party hereby appoints the Collateral Agent as its true
and lawful attorney, with full power of substitution, for the purpose of making
any such withdrawal or ordering any such transfer of funds from any such
Account, which appointment is coupled with an interest and is irrevocable.  The
Loan Parties shall not have any rights or powers with respect to any amounts in
the Accounts (other than the Operating Account) or any part thereof except (i)
as provided in Article V and (ii) the right to have such amounts applied in
accordance with the provisions of this Agreement.

          Section 2.5. Securities Accounts.  The parties hereto hereby agree
                       -------------------
that:

          (a) the Accounts (other than the Operating Account) shall be treated
as "securities accounts" as such term is defined in Section 8-501 of the New
York UCC;

          (b) United States Trust Company of New York, in its capacity as
"securities intermediary" as such term is defined in Section 8-102(a)(14) of the
New York UCC (the "Securities Intermediary"), shall, subject to the terms of
                   -----------------------
this Agreement, treat the Loan Parties as the persons entitled to exercise the
rights that comprise any financial assets credited to the Accounts;

          (c) all property delivered to the Securities Intermediary, pursuant to
the terms of this Agreement, will be promptly credited to the appropriate
Account;

          (d) all securities or other property underlying any financial assets
credited to such Accounts shall be registered in the name of the Securities
Intermediary, indorsed to the Securities Intermediary or in blank and in no case
will any financial asset credited to any Account be registered in the name of
any Loan Party, payable to the order of any Loan Party or specially indorsed to
any Loan Party except to the extent the forgoing have been specially indorsed to
the Securities Intermediary or in blank;

          (e) each item of property (whether investment property, financial
asset, security, instrument or cash) credited to such Accounts shall be treated
as a "financial asset" within the meaning of Section 8-102(a)(9) of the New York
UCC; and

          (f) at any time the Securities Intermediary shall receive an
"entitlement order" (within the meaning of Section 8-102(a)(8) of the New York
UCC) issued by the Collateral Agent and relating to such Accounts, the
Securities Intermediary shall comply with such entitlement order without further
consent by any Loan Party or any other person.
<PAGE>
 
                                                                              21
                                  ARTICLE III

                            Deposits into Accounts
                            ----------------------

          SECTION 3.1.  Revenue Account.  The Loan Parties agree that there
                        ---------------
shall be deposited into the Revenue Account all Revenues received by or on
behalf of any Loan Party.  If, notwithstanding the foregoing, any Loan Party
receives any Revenues, it shall immediately deliver such Revenues in the exact
form received (duly indorsed, if appropriate, in a manner satisfactory to the
Collateral Agent) to the Collateral Agent for deposit into the Revenue Account.
The Collateral Agent shall have the right to receive all Revenues directly from
the Persons owing the same.  All Revenues received by the Collateral Agent shall
be deposited into the Revenue Account.

          SECTION 3.2.  Environmental Capital Expenditure Account.  The Loan
                        -----------------------------------------
Parties agree that there shall be deposited into the Environmental Capital
Expenditure Account all proceeds of Construction Term Loans.  If,
notwithstanding the foregoing, any Loan Party receives any proceeds of
Construction Term Loans, it shall immediately deliver such proceeds in the exact
form received (duly indorsed, if appropriate, in a manner satisfactory to the
Collateral Agent) to the Collateral Agent, and the Collateral Agent shall
deposit such proceeds into the Environmental Capital Expenditure Account.  The
Collateral Agent shall have the right to receive all proceeds of Construction
Term Loans directly from the Lenders making the same.  All proceeds of
Construction Term Loans received by the Collateral Agent shall be deposited into
the Environmental Capital Expenditure Account.

          SECTION 3.3.  Recovery Event Proceeds Account.  The Loan Parties agree
                        -------------------------------
that there shall be deposited into the Recovery Event Proceeds Account all
Recovery Event Proceeds.  If, notwithstanding the foregoing, any Loan Party
shall receive any such proceeds, it shall immediately deliver such proceeds in
the exact form received (duly indorsed, if appropriate, in a manner satisfactory
to the Collateral Agent) to the Collateral Agent for deposit into the Recovery
Event Proceeds Account.  The Collateral Agent shall have the right to receive
all such proceeds directly from the Persons owing the same.  All such proceeds
received by or on behalf of the Collateral Agent shall be deposited into the
Recovery Event Proceeds Account.  

          SECTION 3.4.  Loan Principal Account.  The Loan Parties agree that,
                        ----------------------
until the 364-Day Term Loans have been repaid in full, all Net Cash Proceeds of
any Refinancing Indebtedness shall be deposited into the Loan Principal Account.
If, notwithstanding the foregoing, any Loan Party shall receive any such
proceeds, it shall immediately deliver such proceeds in the exact form received
(duly indorsed, if appropriate, in a manner satisfactory to the Collateral
Agent) to the Collateral Agent for deposit into the Loan Principal Account. The
Collateral Agent shall have the right to receive all such Net Cash Proceeds
directly from the Persons owing the same. All such Net Cash Proceeds received by
the Collateral Agent shall be deposited into the Loan Principal Account.

          SECTION 3.5.  Debt Service Reserve Accounts.  The Loan Parties agree
                        ----------------------------- 
that any DSR Credit Instrument delivered to the Collateral Agent in total or
partial satisfaction of any
<PAGE>
 
                                                                              22
Debt Service Reserve Requirement for any Senior Debt and all proceeds thereof
shall be deposited in the Debt Service Reserve Account established for such
Senior Debt.  

          SECTION 3.6.  Deposits Irrevocable.  Any deposit made into the
                        --------------------
Accounts hereunder shall be irrevocable and all cash, cash equivalents,
instruments, investments and other securities on deposit shall be held in trust
by the Collateral Agent, and applied solely as provided herein.

                                   ARTICLE IV

                            Transfers from Accounts
                            -----------------------  

          SECTION 4.1.  Revenue Account.  (a)  Subject to Section 4.14, on each
                        ---------------
Monthly Transfer Date the Collateral Agent shall transfer, from the funds on
deposit in the Revenue Account, the following amounts in the following order of
priority:

               first, to the Operating Account, the amount certified in such
               ----- 
     Request Letter to be the excess, if any, of the aggregate amount of
     Operating Expenses then due and payable or projected to become due and
     payable in the next succeeding month over the balance then on deposit in
     the Operating Account;

               second, to the Collateral Agent and each Secured Parties'
               ------
     Representative, the amount certified in the Request Letter delivered in
     connection with such Monthly Transfer Date to be the sum of the unpaid
     fees, indemnities, costs and expenses then due and payable to the
     Collateral Agent and such Secured Parties' Representative in respect of
     their respective services in such capacities;

               third, (i) into each Accrued Interest Account, the Accrued
               -----
     Interest Amount calculated for such Accrued Interest Account, together with
     the amount of all deficiencies, if any, with respect to deposits of Accrued
     Interest Amounts required in all prior months, as certified in such Request
     Letter, (ii) into each Principal Account (other than (A) the Loan Principal
     Account and any other Principal Account established in respect of non-
     amortizing Senior Debt, (B) any DSR Letter of Credit Indebtedness Principal
     Account, (C) any Ordinary Course Letter of Credit Indebtedness Principal
     Account and (D) any Swap Indebtedness Termination Payment Account), an
     amount equal to 1/6th of the principal amount, if any, which is payable on
     or within six months following such Monthly Transfer Date on account of the
     Senior Debt with respect to which such Principal Account was established,
     together with the amount of all deficiencies, if any, with respect to
     deposits of principal required in all prior months, as certified in such
     Request Letter, (iii) into each Ordinary Course Letter of Credit
     Indebtedness Principal Account, the amount certified in such Request Letter
     to be sufficient to repay in full the related Ordinary Course Letter of
     Credit Indebtedness then outstanding, and (iv) to the Administrative Agent,
     the amount specified in the Request Letter to be applied to the repayment
     of Revolving Loans;
<PAGE>
 
                                                                              23

               fourth, into each DSR Letter of Credit Indebtedness Principal
               ------
     Account, the amount certified in such Request Letter to be sufficient to
     repay in full the related DSR Letter of Credit Indebtedness then
     outstanding;

               fifth, into each Debt Service Reserve Account, the amounts
               -----
     certified in the Request Letter to be necessary to cause the amount on
     deposit (in the form of one or more DSR Credit Instruments, cash, Permitted
     Investments or a combination thereof) in such Debt Service Reserve Account
     to be equal to the related Debt Service Reserve Requirements;

               sixth, into the Equity Account, the balance remaining in the
               -----  
     Revenue Account.

          (b)  If, on any Monthly Transfer Date, the funds on deposit in the
Revenue Account are insufficient to make in full any transfer required pursuant
to clause first, second, third, or fourth of Section 4.1(a), the Collateral
          -----  ------  -----     ------ 
Agent shall make such transfer with funds then on deposit in the Equity Account.

          (c)  If on any Senior Debt Payment Date, after giving effect to any
transfer to be made on such date pursuant to Sections 4.1(a) and 4.1(b), the
funds on deposit in the Accrued Interest Account for any Senior Debt for which
Debt Service is payable on such date are less than such Debt Service, the
Collateral Agent shall demand payment under the EME Credit Support Guarantee of
the EME Credit Support Amount.  The Collateral Agent shall allocate the proceeds
of such payment received under the EME Credit Support Guarantee among all
Accrued Interest Accounts (without regard to whether there is any shortfall
therein) pro rata based on the Principal Amounts of all Senior Debt outstanding
         --- ----
on such date.

          (d)  If on any Senior Debt Payment Date, after giving effect to any
transfer to be made on such date pursuant to Sections 4.1(a), 4.1(b) and 4.1(c),
the funds on deposit in the Accrued Interest Account or Principal Account for
any Senior Debt for which Debt Service is payable on such date are less than
such Debt Service, the Collateral Agent shall obtain the funds necessary to pay
such Debt Service:  first, from funds in the Debt Service Reserve Account with
                    ----- 
respect to such Senior Debt, if any, including funds obtained from drawings
under any DSR Credit Instrument (other than any EME Debt Service Reserve
Guarantee) held by the Collateral Agent in respect of such Senior Debt; and,
second, from the proceeds of any EME Debt Service Reserve Guarantee held by the
- ------
Collateral Agent in respect of such Senior Debt.

          SECTION 4.2.  [Reserved].
                         --------

          SECTION 4.3.  Environmental Capital Expenditure Account. Subject to
                        -----------------------------------------
Section 4.14, on each Business Day specified in a Request Letter, the Collateral
Agent shall transfer to any Loan Party, from the funds on deposit in the
Environmental Capital Expenditure Account, the amount certified in such Request
Letter to be the aggregate amount then due and payable in respect of
Environmental Capital Expenditures.
<PAGE>
 
                                                                              24

          SECTION 4.4.  Recovery Event Proceeds Account. (a) Except as otherwise
                        -------------------------------
provided in Section 4.4(b) and subject to Section 4.14, on each Monthly Transfer
Date occurring after a Recovery Event and until Restoration with respect thereto
is completed, the Collateral Agent shall transfer to the Borrower, from the
funds on deposit in the Recovery Event Proceeds Account, the amount certified in
the Request Letter delivered in connection with such Monthly Transfer Date to be
the aggregate amount then due and payable in respect of such Restoration.

          (b)  Subject to Section 4.14, on any Senior Debt Payment Date on which
any Senior Debt is required to be prepaid with any Recovery Event Proceeds, the
Collateral Agent shall transfer, from the funds on deposit in the Recovery Event
Proceeds Account, the following amounts in the following order of priority:

          first, to each Secured Parties' Representative for Senior Debt
          -----
     required to be so prepaid, the amount certified in the Request Letter
     delivered in connection with such Senior Debt Payment Date to be the
     aggregate amount of principal, premium and interest then due and payable in
     respect of such Senior Debt; and

          second, to each such Secured Parties' Representative, the amount
          ------
     certified in such Request Letter to be the aggregate amount of all Debt
     Service (other than principal, premium and interest) then due and payable
     in respect of such Senior Debt.

          SECTION 4.5.  Loan Principal and Accrued Interest Accounts.  (a)  On
                        -------------------------------------------- 
any Senior Debt Payment Date on which any amount of principal is due and payable
in respect of the Loans, after giving effect to any transfers to be made on such
date pursuant to Section 4.1, the Collateral Agent shall transfer to the
Administrative Agent, from the funds on deposit in the Loan Principal Account,
the aggregate amount of such principal then due and payable to the Lenders, as
certified in the Request Letter delivered in connection with such Senior Debt
Payment Date.

          (b)  On any Senior Debt Payment Date on which any Debt Service (other
than principal) in respect of the Loans is due and payable in respect of the
Loans, after giving effect to any transfers to be made pursuant to Section 4.1,
the Collateral Agent shall transfer to the Administrative Agent, from the funds
on deposit in the Loan Accrued Interest Account, the aggregate amount of such
Debt Service then due and payable to the Lenders, as certified in the Request
Letter delivered in connection with such Senior Debt Payment Date.

          (c) On the Senior Debt Payment Date on which any Net Cash Proceeds
were applied to repay the 364-Day Term Loans, the Collateral Agent shall
transfer to the Equity Account, from the funds on deposit in the Loan Principal
Account, the aggregate amount of the Excess Net Cash Proceeds.

          SECTION 4.6.  Refinancing Indebtedness Principal and Accrued Interest
                        ------------------------------------------------------- 
Accounts.  (a)  On any Senior Debt Payment Date on which any amount of principal
- --------
or premium is due and payable in respect of any class of Refinancing
Indebtedness, after giving effect to any transfers to be made on such date
pursuant to Section 4.1, the Collateral Agent shall transfer to the Secured
Parties' Representative for such class of Refinancing Indebtedness, from the
funds on
<PAGE>
 
                                                                              25

deposit in the Refinancing Indebtedness Principal Account established for the
benefit of such class of Refinancing Indebtedness, the aggregate amount of such
principal and premium then due and payable to the holders of such Refinancing
Indebtedness, as certified in the Request Letter delivered in connection with
such Senior Debt Payment Date.  

          (b)  On any Senior Debt Payment Date on which any Debt Service (other
than principal) is due and payable in respect of any class of Refinancing
Indebtedness, after giving effect to any transfers to be made on such date
pursuant to Section 4.1, the Collateral Agent shall transfer to the Secured
Parties' Representative for such class of Refinancing Indebtedness, from the
funds on deposit in the Refinancing Indebtedness Accrued Interest Account
established for the benefit of such class of Refinancing Indebtedness, the
aggregate amount of such Debt Service then due and payable to the holders of
such Refinancing Indebtedness, as certified in the Request Letter delivered in
connection with such Senior Debt Payment Date.

          SECTION 4.7.  Ordinary Course Letter of Credit Indebtedness Principal
                        -------------------------------------------------------
and Accrued Interest Accounts.  (a)  On any Senior Debt Payment Date on which
- -----------------------------
any amount of principal is due and payable in respect of any class of Ordinary
Course Letter of Credit Indebtedness, after giving effect to any transfers to be
made on such date pursuant to Section 4.1, the Collateral Agent shall transfer
to the Secured Parties' Representative for such class of Ordinary Course Letter
of Credit Indebtedness, from the funds on deposit in the Ordinary Course Letter
of Credit Indebtedness Principal Account established for the benefit of such
class of Ordinary Course Letter of Credit Indebtedness, the aggregate amount of
principal then due and payable to the holders of such class of Ordinary Course
Letter of Credit Indebtedness, as certified in the Request Letter delivered in
connection with such Senior Debt Payment Date.

          (b)  On any Senior Debt Payment Date on which any Debt Service (other
than principal) is due and payable in respect of any class of Ordinary Course
Letter of Credit Indebtedness, after giving effect to any transfers to be made
on such date pursuant to Section 4.1, the Collateral Agent shall transfer to the
Secured Parties' Representative for such class of Ordinary Course Letter of
Credit Indebtedness, from the funds on deposit in the Ordinary Course Letter of
Credit Indebtedness Accrued Interest Account established for the benefit of such
class of Ordinary Course Letter of Credit Indebtedness, the aggregate amount of
such Debt Service then due and payable to the holders of such class of Ordinary
Course Letter of Credit Indebtedness, as certified in the Request Letter
delivered in connection with such Senior Debt Payment Date.

          SECTION 4.8.  DSR Letter of Credit Indebtedness Principal and Accrued
                        -------------------------------------------------------
Interest Accounts.  (a)  On any Senior Debt Payment Date on which any amount of
- -----------------
principal is due and payable in respect of any class of DSR Letter of Credit
Indebtedness, after giving effect to any transfers to be made on such date
pursuant to Section 4.1, the Collateral Agent shall transfer to the Secured
Parties' Representative for such class of DSR Letter of Credit Indebtedness,
from the funds on deposit in the DSR Letter of Credit Indebtedness Principal
Account established for the benefit of such class of DSR Letter of Credit
Indebtedness, the aggregate amount of principal then due and payable to the
holders of such class of DSR Letter of Credit Indebtedness, as certified in the
Request Letter delivered in connection with such Senior Debt Payment Date.
<PAGE>
 
                                                                              26

          (b)  On any Senior Debt Payment Date on which any Debt Service (other
than principal) is due and payable in respect of any class of DSR Letter of
Credit Indebtedness, after giving effect to any transfers to be made on such
date pursuant to Section 4.1, the Collateral Agent shall transfer to the Secured
Parties' Representative for such class of DSR Letter of Credit Indebtedness,
from the funds on deposit in the DSR Letter of Credit Indebtedness Accrued
Interest Account established for the benefit of such class of DSR Letter of
Credit Indebtedness, the aggregate amount of such Debt Service then due and
payable to the holders of such class of DSR Letter of Credit Indebtedness, as
certified in the Request Letter delivered in connection with such Senior Debt
Payment Date.

          SECTION 4.9.  Additional Indebtedness Principal and Accrued Interest
                        ------------------------------------------------------
Accounts.  (a)  On any Senior Debt Payment Date on which any amount of principal
- --------
or premium is due and payable in respect of any class of Additional
Indebtedness, after giving effect to any transfers to be made on such date
pursuant to Section 4.1, the Collateral Agent shall transfer to the Secured
Parties' Representative for such class of Additional Indebtedness, from the
funds on deposit in the Additional Indebtedness Principal Account established
for the benefit of such class of Additional Indebtedness, the aggregate amount
of principal and premium then due and payable to the holders of such class of
Additional Indebtedness, as certified in the Request Letter delivered in
connection with such Senior Debt Payment Date.

          (b)  On any Senior Debt Payment Date on which any Debt Service (other
than principal) is due and payable in respect of any class of Additional
Indebtedness, after giving effect to any transfers to be made on such date
pursuant to Section 4.1, the Collateral Agent shall transfer to the Secured
Parties' Representative for such class of Additional Indebtedness, from the
funds on deposit in the Additional Indebtedness Accrued Interest Account
established for the benefit of such class of Additional Indebtedness, the
aggregate amount of such Debt Service then due and payable to the holders of
such class of Additional Indebtedness, as certified in the Request Letter
delivered in connection with such Senior Debt Payment Date.

          SECTION 4.10.  Swap Indebtedness Termination Payment and Accrued Fixed
                         -------------------------------------------------------
Payment Accounts.  (a)  On any Senior Debt Payment Date on which any termination
- ----------------
payment is due and payable in respect of any class of Swap Indebtedness, after
giving effect to any transfers to be made on such date pursuant to Section 4.1,
the Collateral Agent shall transfer to the Secured Parties' Representative for
such class of Swap Indebtedness, from the funds on deposit in the Swap
Indebtedness Termination Payment Account established for the benefit of such
class of Swap Indebtedness, the aggregate termination payments then due and
payable to the holders of such class of Swap Indebtedness, as certified in the
Request Letter delivered in connection with such Senior Debt Payment Date.

          (b)  On any Senior Debt Payment Date on which any Debt Service (other
than termination payments) is due and payable in respect of any class of Swap
Indebtedness, after giving effect to any transfers to be made on such date
pursuant to Section 4.1, the Collateral Agent shall transfer to the Secured
Parties' Representative for such class of Swap Indebtedness, from the funds on
deposit in the Swap Indebtedness Accrued Fixed Payment Account established for
the benefit of such class of Swap Indebtedness, the aggregate amount of such
Debt Service

<PAGE>
 
                                                                              27

then due and payable to the holders of such class of Swap Indebtedness, as
certified in the Request Letter delivered in connection with such Senior Debt
Payment Date.

          SECTION 4.11.  Equity Account.  Except during a Default Period, on
                         --------------
each Restricted Payment Date, the Collateral Agent shall transfer, from the
funds on deposit in the Equity Account, the amount certified by the Borrower in
the Request Letter delivered in connection with such Restricted Payment Date to
be then available for use in making Restricted Payments in accordance with the
terms of the Financing Documents.  In addition, the Collateral Agent shall make
transfers from the funds on deposit in the Equity Account in accordance with
Sections 4.1(b) and 4.14(b).

          SECTION 4.12.  Delivery of Request Letters.  Each Request Letter to be
                         ---------------------------
delivered by any Loan Party pursuant to this Article IV shall be delivered to
the Collateral Agent not later than one day prior to the date that the
Collateral Agent is required to make any transfer specified therein.  At the
time any Loan Party delivers to the Collateral Agent any Request Letter or other
written communication relating to the Accounts, such Loan Party shall deliver a
copy thereof to each Secured Parties' Representative.

          SECTION 4.13.  Shortfall Notices.  Not later than the Business Day
                         -----------------
preceding each date on which any transfer is to be made pursuant to this Article
IV, the Collateral Agent shall notify the Borrower and each Secured Parties'
Representative if the amounts requested to be transferred on such date in the
Request Letter delivered in connection therewith exceed the funds available in
the relevant Accounts.

          SECTION 4.14.  Transfers from Accounts During a Default Period. (a)
                         -----------------------------------------------
During a Default Period, the Borrower shall be entitled to issue Request Letters
and otherwise direct the transfer of funds from the Accounts until the
Collateral Agent receives a Notice of Action directing that action be taken
pursuant to Section 4.14(b).

          (b)  At any time after the Collateral Agent receives a Notice of
Action specifying that action be taken pursuant to this Section 4.14(b), the
Collateral Agent shall:  (i) transfer all amounts in the Environmental Capital
Expenditure Account to the Administrative Agent (and such transfer shall be
deemed to be a payment made on account of the Debt Service then due and payable
in respect of the Construction Term Loans); (ii) with respect to any Senior
Debt, transfer all amounts in the Debt Service Reserve Account with respect to
such Senior Debt, including amounts obtained from drawings under any DSR Credit
Instrument held by the Collateral Agent in respect of such Senior Debt, to the
Secured Parties' Representative for such Senior Debt (and such transfer shall be
deemed to be a payment made on account of the Debt Service then due and payable
in respect of such Senior Debt); and (iii) with respect to any Senior Debt,
transfer all amounts in the Accrued Interest Account and the Principal Account
with respect to such Senior Debt to the Secured Parties' Representative for such
Senior Debt (and such transfer shall be deemed to be a payment made on account
of the Debt Service then due and payable in respect of such Senior Debt).  After
making the transfers specified by the immediately preceding clauses (i), (ii)
and (iii), the Collateral Agent shall take or discontinue to take all actions
specified in such

<PAGE>
 
                                                                              28

Notice of Action and/or shall transfer all amounts remaining in the Accounts in
the following order of priority:

          first, to the Collateral Agent and each Secured Parties'
          -----
     Representative, the amount certified by such Person to be the sum of the
     unpaid fees, indemnities, costs and expenses then due and payable to such
     Person for its services in such capacity;

          second, to each Secured Parties' Representative for Senior Debt, the
          ------
     amount certified by such Secured Parties' Representative to be the
     aggregate amount of principal, premium and interest then due and payable in
     respect of such Senior Debt under the related Financing Documents;

          third, to each Secured Parties' Representative for Senior Debt, the
          -----
     amount certified by such Secured Parties' Representative to be the
     aggregate amount of all Debt Service (other than principal, premium and
     interest) then due and payable in respect of such Senior Debt under the
     related Financing Documents;

          fourth, any surplus then remaining shall be paid to the Borrower or
          ------
     its successors or assigns or to whomsoever may be lawfully entitled to
     receive the same or as a court of competent jurisdiction may direct.

          SECTION 4.15.  Collateral Agent's Calculations.  In making the
                         ------------------------------- 
determinations and allocations required by Section 4.14, the Collateral Agent
may rely upon information specified in Sections 6.2 and 6.3 of the Collateral
Agency and Intercreditor Agreement, as applicable, and the Collateral Agent
shall have no liability to any of the Secured Parties for actions taken in
reliance on such information.  All transfers and releases made by the Collateral
Agent pursuant to Section 4.14 shall be (subject to any decree of any court of
competent jurisdiction) final, and the Collateral Agent shall have no duty to
inquire as to the application by any Secured Party of any amounts distributed to
them.

          SECTION 4.16.  Insufficient Amounts.  To the extent the amounts on
                         --------------------
deposit in any Account are insufficient to fully satisfy any transfer
requirement from such Account under this Article IV, such transfer shall be made
to the extent of the amounts on deposit in such Account.  In addition, if (i)
any transfer requirements from any Account in this Article IV share the same
level of priority and (ii) there are insufficient funds in such Account to
satisfy in full all such transfer requirements which share such level of
priority, such transfers shall be made on a pro rata basis to the extent of the
                                            --- ----
amounts on deposit in such Account, provided that if payments on account of
                                    --------
principal, interest and other Debt Service due on the Senior Debt share the same
level of priority, the funds released on account of such payment of Senior Debt
shall be applied, first, to the payment of accrued interest (or, in the case of
                  -----
Swap Indebtedness, accrued amounts) on such Senior Debt to the date of such
payment, second, to the payment of the principal amount (or, in the case of Swap
         ------
Indebtedness, termination payments) of such Senior Debt then due and payable,
and third, to the payment of any other Debt Service then due and payable with
    -----
respect to such Senior Debt.
<PAGE>
 
                                                                              29

          SECTION 4.17.  DSR Credit Instruments.  (a)  Except during a Default
                         ----------------------
Period, the Collateral Agent may release funds from the Debt Service Reserve
Account for any Senior Debt in exchange for one or more DSR Credit Instruments
certified by the Borrower to meet the requirements of the Financing Documents
related to such Senior Debt.  Any amounts so released shall forthwith be
transferred to the Equity Account.

          (b)   The Collateral Agent shall draw upon any DSR Credit Instrument:

               (i)   during a Default Period, at the direction of the Required
                     Secured Parties;

               (ii)  at any time the cash on deposit in any Debt Service Reserve
                     Account in which it is held is insufficient for making any
                     transfer in accordance with terms of this Agreement; and

               (iii) if the related DSR Letter of Credit Provider shall cease to
                     have the Minimum Ratings and such DSR Credit Instrument is
                     not replaced within 30 days.

                                   ARTICLE V

                                   Investment
                                   ----------

          Cash held by the Collateral Agent in the Accounts shall not be
invested or reinvested except as provided below:

          (a) cash held in the Accounts shall be invested and reinvested in
     Permitted Investments by the Collateral Agent who shall make such Permitted
     Investments (i) except during a Default Period, at the written direction of
     the Borrower and (ii) during a Default Period, in Permitted Investments
     selected by the Collateral Agent unless specific investment instructions
     are given to the Collateral Agent by the Required Secured Parties;

          (b) the Collateral Agent shall sell or liquidate all or any designated
     part of the Permitted Investments held in any Account at any time the
     proceeds thereof are required to make a release from any Account or any
     transfer between Accounts pursuant to Article IV hereof; and

          (c) all such Permitted Investments, the interest thereon, and the net
     proceeds of the sale, liquidation or payment thereof, shall be held in the
     appropriate Account for the same purposes as the cash used to purchase such
     Permitted Investments.

The Collateral Agent shall take such action as may be necessary to perfect the
security interest created by this Agreement in all Permitted Investments.
<PAGE>
 
                                                                              30

                                   ARTICLE VI

                                Collateral Agent
                                ----------------

          SECTION 6.1.  Rights, Duties, etc.  The acceptance by the Collateral
                        -------------------
Agent of its respective duties hereunder is subject to the following terms and
conditions which the parties to this Agreement hereby agree shall govern and
control with respect to the rights, duties, liabilities and immunities of the
Collateral Agent:

          (a) it shall not be responsible or liable in any manner whatever for
     soliciting any funds or for the sufficiency, correctness, genuineness or
     validity of any funds or securities deposited with or held by it;

          (b) it shall be protected in acting or refraining from acting upon any
     written notice, certificate, instruction, request or other paper or
     document, as to the due execution thereof and the validity and
     effectiveness of the provisions thereof and as to the truth of any
     information therein contained, which it in good faith believes to be
     genuine;

          (c) it shall not be liable for any error of judgment or for any act
     done or step taken or omitted except in the case of its gross negligence,
     willful misconduct or bad faith;


          (d) it may consult with and obtain advice from counsel of its own
     choice in the event of any dispute or question as to the construction of
     any provision hereof;

          (e) it shall have no duties hereunder, except those which are
     expressly set forth herein and in any modification or amendment hereof;
     provided, however, that no such modification or amendment hereof shall
     --------  -------
     affect its duties unless it shall have given its prior written consent
     thereto;

          (f) it may execute or perform any duties hereunder either directly or
     through administrative agents or attorneys selected with reasonable care;

          (g) it may engage or be interested in any financial or other
     transactions with any party hereto and may act on, or as depositary,
     collateral agent or administrative agent for, any committee or body of
     holders of obligations of such Persons as freely as if it were not
     Collateral Agent hereunder; and

          (h) it shall not be obligated to take any action which in its
     reasonable judgment would involve it in expense or liability unless it has
     been furnished with reasonable indemnity.

          SECTION 6.2.  Resignation or Removal.  The Collateral Agent may resign
                        ----------------------
or be removed as set forth in Section 2.6 of the Collateral Agency and
Intercreditor Agreement.
<PAGE>
 
                                                                              31

                                  ARTICLE VII

                                 Determinations
                                 --------------

          In the event of any dispute as to any amount to be distributed or paid
by the Collateral Agent from the Accounts, the Collateral Agent is authorized
and directed to retain in its possession without liability to anyone all or any
part of the amounts then on deposit in the Accounts, until such dispute shall
have been settled by mutual agreement of the Borrower and the Secured Parties or
by a final order, decree or judgment of a Federal or State court of competent
jurisdiction located in the State of New York (with respect to disputes in
connection with amounts on deposit in the Accounts), and time for an appeal has
expired and no appeal has been perfected, but the Collateral Agent shall be
under no duty whatsoever to institute or defend any such proceedings.

                                  ARTICLE VIII

                                 Miscellaneous
                                 -------------

          SECTION 8.1.  Indemnification of Collateral Agent.  Each Loan Party
                        -----------------------------------
assumes liability for, and agrees to indemnify, protect, save and keep harmless
the Secured Parties and the Collateral Agent and their respective successors,
assigns, agents and servants from and against, any and all claims, liabilities,
obligations, losses, damages, penalties, costs and expenses (including
reasonable attorneys' fees) that may be imposed on, incurred by, or asserted
against, at any time, the Secured Parties or the Collateral Agent and in any way
relating to or arising out of the execution and delivery of this  Agreement, the
establishment of the Accounts, the acceptance of deposits, the purchase or sale
of Permitted Investments, the retention of cash and Permitted Investments or the
proceeds thereof, draws on the DSR Credit Instruments and any payment, transfer
or other application of cash, Permitted Investments or the proceeds of draws of
DSR Credit Instruments by the Collateral Agent in accordance with the provisions
of this Agreement, or as may arise by reason of any act, omission or error of
the Collateral Agent made in good faith in the conduct of its duties; except
that the Borrower shall not be required to indemnify, protect, save and keep
harmless the Collateral Agent or any Secured Party, against its own gross
negligence or willful misconduct.  The indemnities contained in this Section 8.1
shall survive the termination of this Agreement.

          SECTION 8.2.  Waiver of Right of Set-Off.  The Collateral Agent
                        --------------------------
waives, with respect to all of its existing and future claims against the
Borrower, all existing and future rights of set-off and banker's liens against
the Accounts and all items (and proceeds thereof) that come into its possession
in connection with the Accounts.

          SECTION 8.3.  Termination.  The provisions of Articles III and IV with
                        -----------
respect to the Accounts shall terminate on the date on which the Obligations
under Financing Documents shall have been paid in full.  Promptly after such
termination, the Secured Parties shall notify the Collateral Agent of such
termination and the Collateral Agent hereby agrees that at the time of
<PAGE>
 
                                                                              32
such termination (x) any Permitted Investments in the Accounts shall be
liquidated as soon as commercially prudent, (y) a reconciliation shall be made
of the distributions made from the Accounts and any necessary adjustments to the
balances of such Accounts as a result of such reconciliation shall be made and
(z) the moneys in the Accounts (after giving effect to such liquidation and such
adjustments) shall be distributed to the Borrower or as it may direct.

          SECTION 8.4.  Severability.  If any one or more of the covenants or
                        ------------
agreements provided in this Agreement on the part of the parties hereto to be
performed should be determined by a court of competent jurisdiction to be
contrary to law, such covenant or agreement shall be deemed and construed to be
severable from the remaining covenants and agreements herein contained and shall
in no way affect the validity of the remaining provisions of this Agreement.

          SECTION 8.5.  Counterparts.  This Agreement may be executed in several
                        ------------
counterparts, each of which shall be an original and all of which shall
constitute one and the same instrument.

          SECTION 8.6.  Amendments. The provisions of this Agreement may be
                        ----------
amended, modified or waived if such amendment, modification or waiver is in
writing and is entered into in accordance with the provisions of the Collateral
Agency and Intercreditor Agreement.

          SECTION 8.7.  APPLICABLE LAW.  THIS AGREEMENT SHALL IN ALL RESPECTS BE
                        --------------
GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK
REGARDLESS OF ANY OTHER PROVISION IN ANY OTHER AGREEMENT, FOR PURPOSES OF THE
NEW YORK UCC, NEW YORK SHALL BE DEEMED TO BE THE SECURITIES INTERMEDIARY'S
JURISDICTION AND THE ACCOUNTS (AS WELL AS THE SECURITIES ENTITLEMENTS RELATED
THERETO) SHALL BE GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.

          SECTION 8.8.  Notices.  Except as otherwise specifically provided
                        -------
herein, all notices, consents, directions, approvals, instructions, requests and
other communications required or permitted by the terms hereof to be given to
any Person shall be in writing and shall be deemed to have been duly given or
made when delivered if delivered by hand or courier or when received if sent by
mail or telecopy, in each case addressed to the party to which such notice is
required or permitted to be given or made hereunder set forth below its
signature hereto, or such other address as may be specified from time to time by
such party in a notice to the other parties hereto.

          SECTION 8.9.  Benefit of Security Deposit Agreement.  This Security
                        -------------------------------------
Deposit Agreement shall inure to the benefit of, and be enforceable by, the
parties hereto and their respective successors and permitted assigns, and no
other Person shall be entitled to any of the benefits of this Security Deposit
Agreement.
<PAGE>
 
       IN WITNESS WHEREOF, the parties hereto have each caused this Agreement to
be duly executed by their duly authorized officers, all as of the day and year
first above written.

                              EDISON MISSION HOLDINGS CO.


                              By:________________________
                                 Name:
                                 Title:

                              Address for Notices:

                              18101 Von Karman Avenue
                              Suite 1700
                              Irvine, California  92612-1046


                              EDISON MISSION FINANCE CO.


                              By:________________________
                                 Name:
                                 Title:

                              Address for Notices:

                              18101 Von Karman Avenue
                              Suite 1700
                              Irvine, California  92612-1046


                              HOMER CITY PROPERTY HOLDINGS, INC.


                              By:________________________
                                 Name:
                                 Title:

                              Address for Notices:

                              18101 Von Karman Avenue
                              Suite 1700
                              Irvine, California  92612-1046
<PAGE>
 
                              CHESTNUT RIDGE ENERGY CO.


                              By:
                                 -------------------------
                                 Name:
                                 Title:

                              Address for Notices:

                              18101 Von Karman Avenue
                              Suite 1700
                              Irvine, California  92612-1046


                              MISSION ENERGY WESTSIDE, INC.


                              By:
                                 ---------------------------
                                 Name:
                                 Title:

                              Address for Notices:

                              18101 Von Karman Avenue
                              Suite 1700
                              Irvine, California  92612-1046


                              EME HOMER CITY GENERATION L.P.


                              By: Mission Energy Westside, Inc.,
                                     its General Partner


                              By:
                                 -----------------------------
                                 Name:
                                 Title:

                              Address for Notices:

                              18101 Von Karman Avenue
                              Suite 1700
                              Irvine, California  92612-1046
<PAGE>
 
                              UNITED STATES TRUST COMPANY OF NEW
                              YORK, as Collateral Agent


                              By:
                                 -----------------------------
                                 Name:
                                 Title:

                              Address for Notices:

                              114 West 47th Street
                              25th Floor
                              New York, New York  10036

<PAGE>
 
                                                                   Exhibit 10.59

          CREDIT SUPPORT GUARANTEE, dated as of March 18, 1999, made by EDISON
MISSION ENERGY, a California corporation (the "Guarantor"), in favor of UNITED
                                               ---------
STATES TRUST COMPANY OF NEW YORK, as Collateral Agent for the Secured Parties
(as defined below) (in such capacity, the "Collateral Agent").
                                           ----------------

                                    RECITALS
                                    --------

          A.  The Borrower has entered into a Credit Agreement, dated as of
March 18, 1999 (as the same may be amended, supplemented or otherwise modified
from time to time, the "Credit Agreement"), with certain financial institutions
                        ----------------
(collectively, the "Lenders") and Citicorp USA, Inc., as administrative agent
                    -------
for the Lenders (in such capacity, the "Administrative Agent").
                                        --------------------
     
          B.  Pursuant to the Credit Agreement, the Lenders have severally
agreed to make loans (the "Loans") to the Borrower upon the terms and subject
                           -----
to the conditions set forth therein.

          C.  The Borrower will use the proceeds of the Loans under the Credit
Agreement to make valuable transfers to one or more indirect subsidiaries of the
Guarantor in connection with the acquisition of the Homer City Electric
Generating Station (the "Generating Station"), certain capital expenditures
                         ------------------
related to the Generating Station and general working capital purposes.

          D.  Under Section 8.2.1(e) of the Credit Agreement, the Borrower is
permitted to incur certain indebtedness for the purpose of refinancing the Loans
and other indebtedness of the Borrower ("Refinancing Indebtedness"); under
                                         ------------------------
Section 8.2.1(d)(i) of the Credit Agreement, the Loan Parties are permitted to
incur certain indebtedness in the form of reimbursement obligations relating to
letters of credit, surety bonds and performance bonds used by the Loan Parties
in the ordinary course of their business ("Ordinary Course Letter of Credit
                                           --------------------------------
Indebtedness"); under Section 8.2.1(d)(ii) of the Credit Agreement, the Borrower
- ------------
is permitted to incur certain indebtedness in the form of reimbursement
obligations relating to Debt Service Reserve Letters of Credit (as defined
below) ("DSR Letter of Credit Indebtedness"); under Section 8.2.1(c) of the
         ---------------------------------
Credit Agreement, the Borrower is permitted to incur certain additional
indebtedness ("Additional Indebtedness"); and, under Section 8.2.1(b) of the
               -----------------------
Credit Agreement, the Borrower is permitted to incur certain indebtedness under
Interest Rate Hedging Transactions entered into with respect to the Loans ("Swap
                                                                            ----
Indebtedness").
- ------------

          E.  In satisfaction of the requirements of the Lenders and the Persons
providing any Refinancing Indebtedness, Ordinary Course Letter of Credit
Indebtedness, DSR Letter of Credit Indebtedness, Additional Indebtedness or Swap
Indebtedness, the Guarantor desires by this Guarantee (as defined below) to
provide a guarantee for the Borrower's obligations under the Credit Agreement
and the other Financing Documents (as defined below).

          F.  In order to simplify administration of the Financing Documents and
to provide for the orderly enforcement of their respective rights, the
Administrative Agent, the Lenders and
<PAGE>
 
                                                                               2

the other Secured Parties have appointed the Collateral Agent to serve as their
common representative, to be the beneficiary under any guarantee intended to
benefit the Secured Parties and to hold the liens created, or to be created,
under the Financing Documents.

          G.  Pursuant to the Collateral Agency and Intercreditor Agreement,
dated as of March 18, 1999 (as amended, supplemented or otherwise modified from
time to time, the "Collateral Agency and Intercreditor Agreement"), among the
                   ---------------------------------------------
Borrower, the Administrative Agent, the Collateral Agent and certain other
parties, the Collateral Agent has agreed to serve as a common collateral agent
for all Secured Parties.

          H.  The Borrower is a direct wholly-owned Subsidiary of the Guarantor.
The Borrower and the Guarantor are engaged in related businesses, and Guarantor
will derive substantial direct and indirect benefit from the making of the Loans
and the incurrence of any Refinancing Indebtedness, Ordinary Course Letter of
Credit Indebtedness, DSR Letter of Credit Indebtedness, Additional Indebtedness
or Swap Indebtedness.

          I.  It is a condition precedent to the obligation of the Lenders to
make their respective Loans to the Borrower under the Credit Agreement that the
Guarantor shall have executed and delivered this Guarantee to the Collateral
Agent for the benefit of the Secured Parties.

          NOW, THEREFORE, in consideration of the premises, the Guarantor hereby
agrees with the Collateral Agent, for the benefit of the Secured Parties, as
follows:

     1.    Defined Terms.  (a)  Unless otherwise defined herein, terms defined
           -------------
in the Credit Agreement and used herein shall have the meanings given to them in
the Credit Agreement.  

     (b)   The following terms shall have the following meanings:

     "Additional Indebtedness" has the meaning set forth in the recitals.
      -----------------------

     "Debt Service Reserve Letter of Credit" has the meaning set forth in the
      -------------------------------------
Security Deposit Agreement.

     "DSR Letter of Credit Indebtedness" has the meaning set forth in the
      ---------------------------------
recitals.

     "Financing Documents" means the Loan Documents and each indenture, loan
      -------------------
agreement, underwriting agreement, security purchase agreement or other document
entered into in connection with any Senior Debt.

     "Guarantee" means this Credit Support Guarantee.
      ---------

     "Guarantee Cap" means thirty-five million U.S. Dollars (U.S.$35,000,000).
      -------------
<PAGE>
 
                                                                               3

     "Guarantee Termination Date" means the earlier of (i) the date when all
      --------------------------
amounts owing to the Collateral Agent and the Secured Parties by the Borrower on
account of the Obligations are paid in full and the Commitments are terminated,
(ii) December 31, 2001 and (iii) the date that the aggregate amount paid by or
collected from the Guarantor under this Guarantee equals the Guarantee Cap.

     "Guarantor" has the meaning set forth in the preamble.
      ---------                                   --------

     "Obligations" means the collective reference to (a) the unpaid principal of
      -----------
and interest on the Loans, (b) the unpaid principal of and interest on the
Refinancing Indebtedness, if any, (c) the unpaid principal of and interest on
the Ordinary Letter of Credit Indebtedness, if any, (d) the unpaid principal of
and interest on the DSR Letter of Credit Indebtedness, if any, (e) the unpaid
principal of and interest on the Additional Indebtedness, if any, (f) the unpaid
amount of the Swap Indebtedness, if any, and (g) all other obligations and
liabilities of the Borrower (including interest accruing at the then applicable
rate or rates provided in the Financing Documents after the maturity of the
Loans, Refinancing Indebtedness, Ordinary Course Letter of Credit Indebtedness,
DSR Letter of Credit Indebtedness, Additional Indebtedness and/or Swap
Indebtedness, as applicable, and interest accruing at the then applicable rate
or rates provided in the Financing Documents after the filing of any petition in
bankruptcy, or the commencement of any insolvency, reorganization or like
proceeding, relating to the Borrower, whether or not a claim for post-filing or
post-petition interest is allowed in such proceeding) to the Secured Parties,
whether direct or indirect, absolute or contingent, due or to become due, or now
existing or hereafter incurred, which may arise under, out of, or in connection
with, any Financing Document or any other document made, delivered or given in
connection with any of the foregoing, in each case whether on account of
principal, interest, reimbursement obligations, guarantee obligations, fees,
indemnities, costs, expenses or otherwise (including all fees and disbursements
of counsel to the Collateral Agent or to the Secured Parties that are required
to be paid by the Borrower pursuant to the terms of any Financing Document).

     "Ordinary Course Letter of Credit Indebtedness" has the meaning set forth
      ---------------------------------------------
in the recitals.
       --------

     "Refinancing Indebtedness" has the meaning set forth in the recitals.
      ------------------------                                   --------

     "Required Secured Parties" has the meaning set forth in the Collateral
      ------------------------
Agency and Intercreditor Agreement.

     "Secured Parties" means the Collateral Agent, the Administrative Agent, the
      ---------------
Lenders, each Person that provides any Senior Debt and each Person that serves
as indenture trustee, collateral agent, lenders' representative or in any
similar capacity for Persons that provide any Senior Debt.

     "Security Deposit Agreement" means the Security Deposit Agreement, dated as
      --------------------------
of March 18, 1999, among the Borrower, the Collateral Agent and certain other
parties.
<PAGE>
 
                                                                               4

     "Senior Debt" means the Loans, any Refinancing Indebtedness, any Ordinary
      -----------
Course Letter of Credit Indebtedness, any DSR Letter of Credit Indebtedness, any
Additional Indebtedness and any Swap Indebtedness.

     "Swap Indebtedness" has the meaning set forth in the recitals.  
      -----------------                                   --------

     (c)  The words "hereof," "herein" and "hereunder" and words of similar
import when used in this Guarantee shall refer to this Guarantee as a whole and
not to any particular provision of this Guarantee, and section and paragraph
references are to this Guarantee unless otherwise specified.

     (d)  Each reference in this Guarantee to a Financing Document or other
agreement shall be deemed to refer to such Financing Document or other agreement
as the same may be amended, supplemented or otherwise modified from time to
time.

     (e)  Any term defined by reference to an agreement, instrument or other
document shall have the meaning so assigned to it whether or not such agreement,
instrument or document is in effect.

     (f)  Each reference in this Guarantee to a Person shall refer to such
Person and its successors and assigns.

     (g)  Each reference in this Guarantee to a Requirement of Law shall be
deemed to refer to such Requirement of Law as the same may be amended,
supplemented or otherwise modified from time to time.

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

     2.     Guarantee.  (a)  The Guarantor hereby unconditionally and
            ---------
irrevocably guarantees to the Collateral Agent, for the benefit of the Secured
Parties, the prompt and complete payment and performance by the Borrower when
due (whether at the stated maturity, by acceleration or otherwise) of the
Obligations. Notwithstanding the aggregate amount of the Obligations at any time
or from time to time payable or to be payable by the Borrower to the Collateral
Agent or to any Secured Party, the aggregate maximum liability of the Guarantor
to the Collateral Agent and the Secured Parties hereunder shall in no event
exceed the Guarantee Cap.

     (b)  Notwithstanding the Guarantee Cap, the Guarantor further agrees to pay
or reimburse each Secured Party and the Collateral Agent for all its costs and
expenses incurred in collecting against the Guarantor  under this Guarantee or
otherwise enforcing or preserving any rights under this Guarantee, including,
without limitation, the fees and disbursements of counsel to each Secured Party
and of counsel to the Collateral Agent.  This Guarantee shall remain in full
force and effect until the Guarantee Termination Date.
<PAGE>
 
                                                                               5

     (c)  No payment made by the Borrower or any other Person or received or
collected by the Collateral Agent or any Secured Party from the Borrower or any
other Person by virtue of any action or proceeding or any set-off or
appropriation or application, at any time or from time to time, in reduction of
or in payment of the Obligations shall be deemed to modify, reduce, release or
otherwise affect the liability of the Guarantor hereunder which shall,
notwithstanding any such payment (other than any payment made by or collected
from the Guarantor in respect of the Obligations), remain liable for the
Obligations up to the Guarantee Cap until the Guarantee Termination Date.

     (d)  The Guarantor agrees that, upon the occurrence of any event specified
in Section 4.1(c) of the Security Deposit Agreement, the Collateral Agent shall
be entitled to demand payment, and the Guarantor shall promptly pay, an amount
or amounts which in the aggregate do not exceed the Guarantee Cap, for
application as specified therein.

     3.     Right of Set-off . The Guarantor hereby irrevocably authorizes the
            ----------------
Collateral Agent and each Secured Party at any time and from time to time (i)
upon the occurrence of an Event of Default of the kind described in clauses (a)
or (b) of Section 9.1.6 of the Credit Agreement, (ii) upon the occurrence of any
Default of the kind described in clauses (c) or (d) of Section 9.1.6 of the
Credit Agreement with respect to the Borrower, or (iii) upon the occurrence and
continuance beyond the applicable grace period, if any, of any other Event of
Default and with the consent of the Required Secured Parties, without notice to
the Guarantor, any such notice being expressly waived by the Guarantor, to set-
off and appropriate and apply 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 the Collateral Agent or such Secured Party to or for the credit or the
account of the Guarantor, or any part thereof in such amounts as the Collateral
Agent or such Secured Party may elect, against and on account of the obligations
and liabilities of the Guarantor to the Collateral Agent or such Secured Party
hereunder and claims of every nature and description of the Collateral Agent or
such Secured Party against the Guarantor, in any currency, whether arising
hereunder, under the Credit Agreement, any other Financing Document or
otherwise, as the Collateral Agent or such Secured Party may elect, whether or
not the Collateral Agent or any Secured Party has made any demand for payment
and although such obligations, liabilities and claims may be contingent or
unmatured.  The Collateral Agent and each Secured Party shall notify the
Guarantor promptly of any such set-off and the application made by the
Collateral Agent or such Secured Party of the proceeds thereof, provided that
                                                                --------
the failure to give such notice shall not affect the validity of such set-off
and application.  The rights of the Collateral Agent and each Secured Party
under this paragraph are in addition to other rights and remedies (including,
without limitation, other rights of set-off) which the Collateral Agent or such
Secured Party may have.

     4.     No Subrogation.  Notwithstanding any payment or payments made by the
            --------------
Guarantor hereunder, or any set-off or application of funds of the Guarantor by
the Collateral Agent or any Secured Party, the Guarantor shall not be entitled
to be subrogated to any of the rights of the Collateral Agent or any Secured
Party against the Borrower or against any collateral security or
<PAGE>
 
                                                                               6

guarantee or right of offset held by the Collateral Agent or any Secured Party
for the payment of the Obligations, nor shall the Guarantor seek or be entitled
to seek any contribution or reimbursement from the Borrower in respect of
payments made by the Guarantor hereunder, until the Guarantee Termination Date.
If any amount shall be paid to the Guarantor on account of such subrogation
rights at any time prior to the Guarantee Termination Date, such amount shall be
held by the Guarantor in trust for the Collateral Agent and the Secured Parties,
segregated from other funds of the Guarantor, and shall, forthwith upon receipt
by the Guarantor, be turned over to the Collateral Agent in the exact form
received by the Guarantor (duly indorsed by the Guarantor to the Collateral
Agent, if required), to be applied against the Obligations, whether matured or
unmatured, in such order as the Collateral Agent may determine.

     5.     Amendments, etc. with respect to the Obligations; Waiver of Rights.
            ------------------------------------------------------------------ 
The Guarantor shall remain obligated hereunder notwithstanding that, without any
reservation of rights against the Guarantor and without notice to or further
assent by the Guarantor, any demand for payment of any of the Obligations made
by the Collateral Agent or any Secured Party may be rescinded by the Collateral
Agent or such Secured Party and any of the Obligations continued, and the
Obligations, or the liability of any other party upon or for any part thereof,
or any collateral security or guarantee therefor or right of offset with respect
thereto, may, from time to time, in whole or in part, be renewed, extended,
amended, modified, accelerated, compromised, waived, surrendered or released by
the Collateral Agent or any Secured Party, and the Financing Documents and any
other documents executed and delivered in connection therewith may be amended,
modified, supplemented or terminated, in whole or in part, and any collateral
security, guarantee or right of offset at any time held by the Collateral Agent
or any Secured Party for the payment of the Obligations may be sold, exchanged,
waived, surrendered or released.  Neither the Collateral Agent nor any Secured
Party shall have any obligation to protect, secure, perfect or insure any Lien
at any time held by it as security for the Obligations or for this Guarantee or
any property subject thereto. When making any demand hereunder against the
Guarantor, the Collateral Agent or any Secured Party may, but shall be under no
obligation to, make a similar demand on the Borrower or any other guarantor, and
any failure by the Collateral Agent or any Secured Party to make any such demand
or to collect any payments from the Borrower or any such other guarantor or any
release of the Borrower or such other guarantor shall not relieve the Guarantor
of its obligations or liabilities hereunder, and shall not impair or affect the
rights and remedies, express or implied, or as a matter of law, of the
Collateral Agent or any Secured Party against the Guarantor.  For the purposes
hereof "demand" shall include the commencement and continuance of any legal
proceedings.

     6.     Guarantee Absolute and Unconditional.  The Guarantor waives any and
            ------------------------------------
all notice of the creation, renewal, extension or accrual of any of the
Obligations and notice of or proof of reliance by the Collateral Agent or any
Secured Party upon this Guarantee or acceptance of this Guarantee; the
Obligations, and any of them, shall conclusively be deemed to have been created,
contracted or incurred, or renewed, extended, amended or waived, in reliance
upon this Guarantee; and all dealings between the Borrower or the Guarantor, on
the one hand, and the Collateral Agent and the Secured Parties, on the other,
shall likewise be conclusively presumed to have been had or consummated in
reliance upon this Guarantee.  The Guarantor waives diligence,
<PAGE>
 
                                                                               7

presentment, protest, demand for payment and notice of default or nonpayment to
or upon the Borrower or the Guarantor with respect to the Obligations.  This
Guarantee shall be construed as a continuing, absolute and unconditional
guarantee of payment without regard to (a) the validity, regularity or
enforceability of any Financing Document, any of the Obligations or any other
collateral security therefor or guarantee or right of offset with respect
thereto at any time or from time to time held by the Collateral Agent or any
Secured Party, (b) any defense, set-off or counterclaim (other than a defense of
payment or performance) which may at any time be available to or be asserted by
the Borrower against the Collateral Agent or any Secured Party, or (c) any other
circumstance whatsoever (with or without notice to or knowledge of the Borrower
or the Guarantor) which constitutes, or might be construed to constitute, an
equitable or legal discharge of the Borrower for the Obligations, or of the
Guarantor under this Guarantee, in bankruptcy or in any other instance.  When
pursuing its rights and remedies hereunder against the Guarantor, the Collateral
Agent and any Secured Party may, but shall be under no obligation to, pursue
such rights and remedies as it may have against the Borrower or any other Person
or against any collateral security or guarantee for the Obligations or any right
of offset with respect thereto, and any failure by the Collateral Agent or any
Secured Party to pursue such other rights or remedies or to collect any payment
from the Borrower or any such other Person or to realize upon any such
collateral security or guarantee or to exercise any such right of offset, or any
release of the Borrower or any such other Person or of any such collateral
security, guarantee or right of offset, shall not relieve the Guarantor of any
liability hereunder, and shall not impair or affect the rights and remedies,
whether express, implied or available as a matter of law, of the Collateral
Agent or any Secured Party against the Guarantor. This Guarantee shall remain in
full force and effect and be binding in accordance with and to the extent of its
terms upon the Guarantor and shall inure to the benefit of the Collateral Agent
and the Secured Parties until the Guarantee Termination Date.

     7.     Reinstatement.  This Guarantee shall continue to be effective, or be
            -------------
reinstated, as the case may be, if, at any time prior to the Guarantee
Termination Date, payment, or any part thereof, of any of the Obligations is
rescinded or must otherwise be restored or returned by the Collateral Agent or
any Secured Party upon the insolvency, bankruptcy, dissolution, liquidation or
reorganization of the Borrower or upon or as a result of the appointment of a
receiver, intervenor or conservator of, or trustee or similar officer for, the
Borrower or any substantial part of its property, or otherwise, all as though
such payments had not been made.

     8.     Payments.  The Guarantor hereby agrees that the Obligations will be
            --------
paid to the Collateral Agent without set-off or counterclaim in Dollars at the
office of the Collateral Agent or to such other place as the Collateral Agent
may specify in writing.

     9.     Representations and Warranties.  The Guarantor represents and
            ------------------------------
warrants to the Collateral Agent and the Secured Parties that:

          (a)  The Guarantor (i) is a corporation validly organized and existing
     and in good standing under the laws of the state of its incorporation, (ii)
     is duly qualified to do business and is in good standing as a foreign
     corporation in each jurisdiction where the nature of its
<PAGE>
 
                                                                               8

     business requires such qualification and (iii) has all requisite corporate
     power and authority and holds all material requisite Governmental Approvals
     to enter into and perform its obligations under this Guarantee and to
     conduct its business substantially as currently conducted by it, except,
     with respect to clauses (ii) and (iii) above, where the failure to be so
     qualified or be in good standing or the failure to obtain such Governmental
     Approvals would not, individually or in the aggregate, cause a material
     adverse effect;

          (b)  The execution, delivery and performance by the Guarantor of this
     Guarantee are within the Guarantor's corporate powers, have been duly
     authorized by all necessary corporate action, and do not:

               (i) contravene the Guarantor's Organic Documents;

               (ii) contravene any material Requirement of Law or Contractual
          Obligation, binding on or affecting the Guarantor; or

               (iii)  result in, or require the creation or imposition of, any
     Lien on any of the Guarantor's properties;

          (c)  No Governmental Approval is required for the Guarantor to execute
     and perform its obligations under this Guarantee, except for those which
     have been duly obtained or effected.  No material Governmental Approval is
     required for the Guarantor to carry on its business, except for those which
     have been duly obtained or effected;

          (d)  The Guarantor is in compliance with all Requirements of Law and
     Contractual Obligations applicable to it, except to the extent that the
     failure to comply therewith would not have a material adverse effect; and

          (e)  This Guarantee constitutes the legal, valid and binding
     obligation of the Guarantor enforceable in accordance with its terms
     (except as may be limited by bankruptcy, insolvency or other similar laws
     affecting the enforcement of creditors' rights generally and general
     principles of equity).

     10.    Authority of Collateral Agent.  The Guarantor acknowledges that the
            -----------------------------   
rights and responsibilities of the Collateral Agent under this Guarantee with
respect to any action taken by the Collateral Agent or the exercise or non-
exercise by the Collateral Agent of any option, right, request, judgment or
other right or remedy provided for herein or resulting or arising out of this
Guarantee shall, as between the Collateral Agent and the Secured Parties, be
governed by the Collateral Agency and Intercreditor Agreement and by such other
agreements with respect thereto as may exist from time to time among them, but,
as between the Collateral Agent and the Guarantor, the Collateral Agent shall be
conclusively presumed to be acting as agent for the Secured Parties with full
and valid authority so to act or refrain from acting, and the Guarantor shall
not be under any obligation, or entitlement, to make any inquiry respecting such
authority.
<PAGE>
 
                                                                               9

     11.    Notices.  All notices, requests and demands to or upon the
            -------
Collateral Agent or the Guarantor to be effective shall be in writing (or by
telex, fax or similar electronic transfer confirmed in writing) and shall be
deemed to have been duly given or made (i) when delivered by hand or (ii) if
given by mail, when deposited in the mails by certified mail, return receipt
requested, or (iii) if by telex, fax or similar electronic transfer, when sent
and receipt has been confirmed, addressed as follows:

            (a)  if to the Collateral Agent, at its address or transmission
     number for notices provided in the Collateral Agency and Intercreditor
     Agreement; and

            (b)  if to the Guarantor, at its address or transmission number for
     notices set forth under its signature below.

     The Collateral Agent and the Guarantor may change its address and
transmission numbers for notices by notice in the manner provided in this
Section.

     12.    Severability.  Any provision of this Guarantee which 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.

     13.    Integration. This Guarantee represents the agreement of the
            -----------
Guarantor with respect to the subject matter hereof, and there are no promises,
undertakings, representations or warranties by the Collateral Agent or any
Secured Party relative to subject matter hereof not expressly set forth or
referred to in this Guarantee.  This Guarantee supersedes any and all prior
agreements and understandings, oral or written, relative or with respect to the
subject matter hereof, and there are no promises, undertakings, representations
or warranties by the Collateral Agent or any Secured Party relative to the
subject matter hereof not expressly set forth or referred to herein.

     14.    Amendments; No Waiver; Cumulative Remedies.  (a)  None of the terms
            ------------------------------------------
or provisions of this Guarantee may be waived, amended, supplemented or
otherwise modified except in accordance with the Collateral Agency and
Intercreditor Agreement.

            (b)  Neither the Collateral Agent nor any Secured Party shall by any
act (except pursuant to paragraph (a)), delay, indulgence, omission or otherwise
                        -------------
be deemed to have waived any right or remedy hereunder or to have acquiesced in
any Default or Event of Default or in any breach of any of the terms and
conditions hereof. No failure to exercise, nor any delay in exercising, on the
part of the Collateral Agent or any Secured Party, any right, power or privilege
hereunder shall operate as a waiver thereof. No single or partial exercise of
any right, power or privilege hereunder shall preclude any other or further
exercise thereof or the exercise of any other right, power or privilege. A
waiver by the Collateral Agent or any Secured Party of any right or remedy
<PAGE>
 
                                                                              10

hereunder on any one occasion shall not be construed as a bar to any right or
remedy which the Collateral Agent or such Secured Party would otherwise have on
any future occasion.

            (c)  The rights and remedies herein provided are cumulative, may be
exercised singly or concurrently and are not exclusive of any other rights or
remedies provided by law.

     15.    Section Headings.  The section headings used in this Guarantee are
            ----------------
for convenience of reference only and are not to affect the construction hereof
or be taken into consideration in the interpretation hereof.

     16.    Governing Law.  This Guarantee shall be governed by, and construed
            -------------
and interpreted in accordance with, the law of the State of New York.
<PAGE>
 
     IN WITNESS WHEREOF, the undersigned has caused this Guarantee to be duly
executed and delivered by its duly authorized officer as of the day and year
first above written.

                                    EDISON MISSION ENERGY


                                    By:_______________________________
                                       Name:
                                       Title:

                                    Address for Notices:

                                    18101 Von Karman Avenue
                                    Suite 1700
                                    Irvine, CA  92612-1046

                                    Telex:  (949) 752-5588
                                    Fax: (949) 752-5624

<PAGE>
 
                                                                   Exhibit 10.60

 
          DEBT SERVICE RESERVE GUARANTEE, dated as of March 18, 1999 made by
EDISON MISSION ENERGY, a California corporation (the "Guarantor"), in favor of
                                                      ---------
United States Trust Company of New York, as collateral agent (the "Collateral
                                                                   ----------
Agent") on behalf of the various financial institutions (the "Lenders") as are 
- -----                                                         -------
or may become parties to the Credit Agreement, dated as of March 18, 1999 (as
amended, supplemented or otherwise modified from time to time, the "Credit
                                                                    ------  
Agreement"), among Edison Mission Holdings Co. (the "Borrower"), the Lenders and
- ---------                                            --------   
Citicorp USA, Inc., as Administrative Agent (in such capacity, the
"Administrative Agent").
 --------------------

                                   RECITALS
                                   --------

          A.  Pursuant to the Credit Agreement, the Lenders have severally
agreed to make loans (the "Loans") to the Borrower upon the terms and subject to
                           -----
the conditions set forth therein.

          B.  Under Section 8.2.7 of the Credit Agreement, the Borrower has
agreed not to make any Restricted Payments (as therein defined) unless, inter
alia, the Debt Service Reserve Requirement (as therein defined) is satisfied.

          C.  The Debt Service Reserve Requirement may be satisfied by cash,
certain letters of credit, this Guarantee or a combination thereof.

          D.  The Guarantor is the parent company of the Borrower and wishes to
enter into this Guarantee so that the Borrower may meet the Debt Service Reserve
Requirement under the Credit Agreement.

          E.  Under the Credit Agreement, the Borrower is permitted to incur
certain Senior Debt (as defined below) for which certain guarantees and liens
are provided.

          F.  In order to simplify administration of such guarantees and liens
and to provide for the orderly enforcement of their respective rights, the
Administrative Agent, the Lenders and the other Secured Parties (as defined
below) have appointed the Collateral Agent to serve as their common
representative, to be the beneficiary under any guarantee intended to benefit
the Secured Parties and to hold the liens created, or to be created, under the
terms and requirements of any Senior Debt. 

          G.  Pursuant to the Collateral Agency and Intercreditor Agreement,
dated as of March 18, 1999 (as amended, supplemented or otherwise modified from
time to time, the "Collateral Agency and Intercreditor Agreement"), among the
                   ---------------------------------------------
Borrower, the Administrative Agent, the Collateral Agent and certain other
parties, the Collateral Agent has agreed to serve as a common collateral agent
for all Secured Parties.

<PAGE>
 
                                                                               2
     NOW, THEREFORE, in consideration of the premises, the Guarantor hereby
agrees with the Collateral Agent, for the benefit of the Lenders, as follows:

     1.  Defined Terms.  (a)  Unless otherwise defined herein, terms defined in
         -------------
the Credit Agreement and used herein shall have the meanings given to them in
the Credit Agreement.

     (b) The following terms shall have the following meanings:

     "Collateral Agent" has the meaning set forth in the recitals.
      ----------------

     "DSR Credit Instrument" has the meaning set forth in the Security Deposit
      ---------------------
Agreement.

     "Guarantee" means this Debt Service Reserve Guarantee.
      ---------

     "Guarantor" has the meaning set forth in the preamble.
      ---------                                   --------

     "Guarantee Amount" means thirty million U.S. Dollars (U.S.$30,000,000).
      ----------------

     "Obligations" means the collective reference to the unpaid principal of and
      -----------
interest on the Loans and all other obligations and liabilities of the Borrower
to the Administrative Agent and the Lenders (including interest accruing
pursuant to Section 3.2.2 of the Credit Agreement), whether direct or indirect,
absolute or contingent, due or to become due, or now existing or hereafter
incurred, which may arise under, out of, or in connection with, any Loan
Document or any other document made, delivered or given in connection therewith,
in each case whether on account of principal, interest, reimbursement
obligations, guarantee obligations, fees, indemnities, costs, expenses or
otherwise (including all fees and disbursements of counsel to the Administrative
Agent or to the Lenders that are required to be paid by the Borrower or the
Guarantor pursuant to the terms of this Guarantee or any other Loan Document).

     "Secured Parties" means the Collateral Agent, the Administrative Agent, the
      ---------------
Lenders, each Person that provides any Senior Debt and each Person that serves
as indenture trustee, collateral agent, lenders' representative or in any
similar capacity for Persons that provide any Senior Debt.

     "Senior Debt" has the meaning set forth in the Credit Agreement.
      -----------

     (c) The words "hereof," "herein" and "hereunder" and words of similar
import when used in this Guarantee shall refer to this Guarantee as a whole and
not to any particular provision of this Guarantee, and section and paragraph
references are to this Guarantee unless otherwise specified.
<PAGE>
 
                                                                               3

     (d) Each reference in this Guarantee to a Financing Document or other
agreement shall be deemed to refer to such Financing Document or other agreement
as the same may be amended, supplemented or otherwise modified from time to
time.

     (e) Any term defined by reference to an agreement, instrument or other
document shall have the meaning so assigned to it whether or not such agreement,
instrument or document is in effect.

     (f)  Each reference in this Guarantee to a Person shall refer to such
Person and its successors and assigns.

     (g) Each reference in this Guarantee to a Requirement of Law shall be
deemed to refer to such Requirement of Law as the same may be amended,
supplemented or otherwise modified from time to time.

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

     2.  Guarantee.  (a)  The Guarantor hereby unconditionally and irrevocably
         ---------
guarantees to the  Collateral Agent, for the benefit of the Lenders, the prompt
and complete payment and performance by the Borrower when due (whether at the
stated maturity, by acceleration or otherwise) of the Obligations.
Notwithstanding the aggregate amount of the Obligations at any time or from time
to time payable or to be payable by the Borrower to the Administrative Agent or
to any Lender, the aggregate maximum liability of the Guarantor hereunder during
any Fiscal Quarter shall in no event exceed the Guarantee Amount for such Fiscal
Quarter.  The Guarantor agrees that the Obligations may at any time and from
time to time exceed the amount of the liability of the Guarantor hereunder
without impairing this Guarantee or affecting the rights and remedies of the
Collateral Agent or any Lender hereunder.

     (b) Notwithstanding the Guarantee Amount, the Guarantor further agrees to
pay or reimburse each Lender and the Collateral Agent for all its costs and
expenses incurred in collecting against the Guarantor under this Guarantee or
otherwise enforcing or preserving any rights under this Guarantee, including the
fees and disbursements of counsel to each Lender and of counsel to the
Collateral Agent.  Unless a demand for payment shall have been made hereunder
and be unsatisfied, this Guarantee may be terminated in its entirety, or amended
to reduce the Guarantee Amount, upon three (3) Business Days' notice by the
Guarantor to the Collateral Agent, provided that the Debt Service Reserve
                                   --------
Requirement is then otherwise satisfied by one or more other DSR Credit
Instruments, cash, Permitted Investments or a combination thereof.

     (c) No payment made by the Borrower or any other Person or received or
collected by the Collateral Agent or any Secured Party from the Borrower or any
other Person by virtue of any action or proceeding or any set-off or
appropriation or application, at any time or from time to time, in reduction of
or in payment of the Obligations shall be deemed to modify, reduce, release
<PAGE>
 
                                                                               4

or otherwise affect the liability of the Guarantor hereunder which shall,
notwithstanding any such payment (other than any payment made by or collected
from the Guarantor in respect of the Obligations), remain liable for the
Obligations up to the Guarantee Amount until the Obligations are paid in full
and the Commitments are terminated.

     3.  Right of Set-off. The Guarantor hereby irrevocably authorizes the
         ----------------  
Collateral Agent and each Lender at any time and from time to time (i) upon the
occurrence of an Event of Default of the kind described in clauses (a) or (b) of
Section 9.1.6 of the Credit Agreement, (ii) upon the occurrence of any Default
of the kind described in clauses (c) or (d) of Section 9.1.6 of the Credit
Agreement with respect to the Borrower, or (iii) upon the occurrence and
continuance beyond the applicable grace period, if any, of any other Event of
Default and with the consent of the Required Lenders, without notice to the
Guarantor, any such notice being expressly waived by the Guarantor, to set-off
and appropriate and apply 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 the Collateral Agent or such Lender to or for the credit or the account
of the Guarantor, or any part thereof in such amounts as the Collateral Agent or
such Lender may elect, against and on account of the obligations and liabilities
of the Guarantor to the Collateral Agent or such Lender hereunder and claims of
every nature and description of the Collateral Agent or such Lender against the
Guarantor, in any currency, whether arising hereunder, under the Credit
Agreement, any other Loan Document or otherwise, as the Collateral Agent or such
Lender may elect, whether or not the Collateral Agent or any Lender has made any
demand for payment and although such obligations, liabilities and claims may be
contingent or unmatured.  The Collateral Agent and each Lender shall notify  the
Guarantor promptly of any such set-off and the application made by the
Collateral Agent or such Lender of the proceeds thereof, provided that the
                                                         --------
failure to give such notice shall not affect the validity of such set-off and
application.  The rights of the Collateral Agent and each Lender under this
paragraph are in addition to other rights and remedies (including, without
limitation, other rights of set-off) which the Collateral Agent or such Lender
may have.

     4.  No Subrogation.  Notwithstanding any payment or payments made by the
         --------------
Guarantor hereunder, or any set-off or application of funds of the Guarantor by
the Collateral Agent or any Lender, the Guarantor shall not be entitled to be
subrogated to any of the rights of the Collateral Agent or any Lender against
the Borrower or against any collateral security or guarantee or right of offset
held by the Collateral Agent or any Lender for the payment of the Obligations,
nor shall the Guarantor seek or be entitled to seek any contribution or
reimbursement from the Borrower in respect of payments made by the Guarantor
hereunder, until all amounts owing to the Collateral Agent and the Lenders by
the Borrower on account of the Obligations are paid in full and the Commitments
are terminated.  If any amount shall be paid to the Guarantor on account of such
subrogation rights at any time when all of the Obligations shall not have been
paid in full and any payment made by or collected from the Guarantor in respect
of the Obligations is less than the Guarantee Amount applicable at such time,
such amount shall be held by the Guarantor in trust for the Collateral Agent and
the Lenders, segregated from other funds of the Guarantor, and shall,
<PAGE>
 
                                                                               5

forthwith upon receipt by the Guarantor, be turned over to the Collateral Agent
in the exact form received by the Guarantor (duly indorsed by the Guarantor to
the Collateral Agent, if required), to be applied against the Obligations,
whether matured or unmatured, in such order as the Collateral Agent may
determine.

     5.  Amendments, etc. with respect to the Obligations; Waiver of Rights.
         ------------------------------------------------------------------
The Guarantor shall remain obligated hereunder notwithstanding that, without any
reservation of rights against the Guarantor, and without notice to or further
assent by the Guarantor, any demand for payment of any of the Obligations made
by the Collateral Agent or any Lender may be rescinded by the Collateral Agent
or such Lender, and any of the Obligations continued, and the Obligations, or
the liability of any other party upon or for any part thereof, or any collateral
security or guarantee therefor or right of offset with respect thereto, may,
from time to time, in whole or in part, be renewed, extended, amended, modified,
accelerated, compromised, waived, surrendered or released by the Collateral
Agent or any Lender, and the Loan Documents and any other documents executed and
delivered in connection therewith may be amended, modified, supplemented or
terminated, in whole or in part, and any collateral security, guarantee or right
of offset at any time held by the Collateral Agent or any Lender for the payment
of the Obligations may be sold, exchanged, waived, surrendered or released.
Neither the Collateral Agent nor any Lender shall have any obligation to
protect, secure, perfect or insure any Lien at any time held by it as security
for the Obligations or for this Guarantee or any property subject thereto. When
making any demand hereunder against the Guarantor, the Collateral Agent or any
Lender may, but shall be under no obligation to, make a similar demand on the
Borrower or any other guarantor, and any failure by the Collateral Agent or any
Lender to make any such demand or to collect any payments from the Borrower or
any such other guarantor or any release of the Borrower or such other guarantor
shall not relieve the Guarantor of its obligations or liabilities hereunder, and
shall not impair or affect the rights and remedies, express or implied, or as a
matter of law, of the Collateral Agent or any Lender against the Guarantor.  For
the purposes hereof "demand" shall include the commencement and continuance of
any legal proceedings.

     6.  Guarantee Absolute and Unconditional.  The Guarantor waives any and all
         ------------------------------------  
notice of the creation, renewal, extension or accrual of any of the Obligations
and notice of or proof of reliance by the Collateral Agent or any Lender upon
this Guarantee or acceptance of this Guarantee; the Obligations, and any of
them, shall conclusively be deemed to have been created, contracted or incurred,
or renewed, extended, amended or waived, in reliance upon this Guarantee; and
all dealings between the Borrower or the Guarantor, on the one hand, and the
Collateral Agent and the Lenders, on the other, shall likewise be conclusively
presumed to have been had or consummated in reliance upon this Guarantee.  The
Guarantor waives diligence, presentment, protest, demand for payment and notice
of default or nonpayment to or upon the Borrower or the Guarantor with respect
to the Obligations.  This Guarantee shall be construed as a continuing, absolute
and unconditional guarantee of payment without regard to (a) the validity,
regularity or enforceability of any Loan Document, any of the Obligations or any
other collateral security therefor or guarantee or right of offset with respect
thereto at any time or from time to time held by the Collateral Agent or any
Lender, (b) any defense, set-off or counterclaim (other
<PAGE>
 
                                                                               6

than a defense of payment or performance) which may at any time be available to
or be asserted by the Borrower against the Collateral Agent or any Lender, or
(c) any other circumstance whatsoever (with or without notice to or knowledge of
the Borrower or the Guarantor) which constitutes, or might be construed to
constitute, an equitable or legal discharge of the Borrower for the Obligations,
or of the Guarantor under this Guarantee, in bankruptcy or in any other
instance.  When pursuing its rights and remedies hereunder against the
Guarantor, the Collateral Agent and any Lender may, but shall be under no
obligation to, pursue such rights and remedies as it may have against the
Borrower or any other Person or against any collateral security or guarantee for
the Obligations or any right of offset with respect thereto, and any failure by
the Collateral Agent or any Lender to pursue such other rights or remedies or to
collect any payment from the Borrower or any such other Person or to realize
upon any such collateral security or guarantee or to exercise any such right of
offset, or any release of the Borrower or any such other Person or of any such
collateral security, guarantee or right of offset, shall not relieve the
Guarantor of any liability hereunder, and shall not impair or affect the rights
and remedies, whether express, implied or available as a matter of law, of the
Collateral Agent or any Lender against the Guarantor. This Guarantee shall
remain in full force and effect and be binding in accordance with and to the
extent of its terms upon the Guarantor and shall inure to the benefit of the
Collateral Agent and the Lenders until all the Obligations and the obligations
of the Guarantor under this Guarantee shall have been satisfied by payment in
full and the Commitments shall be terminated.

     7.  Reinstatement.  This Guarantee shall continue to be effective, or be
         -------------
reinstated, as the case may be, if, at any time, payment, or any part thereof,
of any of the Obligations is rescinded or must otherwise be restored or returned
by the Collateral Agent or any Lender upon the insolvency, bankruptcy,
dissolution, liquidation or reorganization of the Borrower or upon or as a
result of the appointment of a receiver, intervenor or conservator of, or
trustee or similar officer for, the Borrower or any substantial part of its
property, or otherwise, all as though such payments had not been made.

     8.  Payments.  The Guarantor hereby agrees that the Obligations will be
         --------
paid to the Collateral Agent without set-off or counterclaim in Dollars at the
office of the Collateral Agent, for deposit in the "Loan Debt Service Reserve
Account", account no. 09040300, or to such other place as the Collateral Agent
may specify in writing.

     9.  Representations and Warranties.  The Guarantor represents and warrants
         ------------------------------
to the Administrative Agent and the Lenders that:

          (a) The Guarantor (i) is a corporation validly organized and existing
     and in good standing under the laws of the state of its incorporation, (ii)
     is duly qualified to do business and is in good standing as a foreign
     corporation in each jurisdiction where the nature of its business requires
     such qualification and (iii) has all requisite corporate power and
     authority and holds all material requisite Governmental Approvals to enter
     into and perform its obligations under this Guarantee and to conduct its
     business substantially as
<PAGE>
 
                                                                               7

     currently conducted by it, except, with respect to clause (ii) and (iii)
     above, where the failure to be so qualified or be in good standing or the
     failure to obtain such Governmental Approvals would not, individually or in
     the aggregate, cause a material adverse effect;

          (b) The execution, delivery and performance by the Guarantor of this
     Guarantee are within the Guarantor's corporate powers, have been duly
     authorized by all necessary corporate action, and do not:

               (i) contravene the Guarantor's Organic Documents;

               (ii) contravene any material Requirement of Law or Contractual
          Obligations binding on or affecting the Guarantor; or

               (iii)  result in, or require the creation or imposition of, any
          Lien on any of the Guarantor's properties;

          (c) No Governmental Approval is required for the Guarantor to execute
     and perform its obligations under this Guarantee, except for those which
     have been duly obtained or effected.  No material Governmental Approval is
     required for the Guarantor to carry on its business, except for those which
     have been duly obtained or effected;

          (d) The Guarantor is in compliance with all Requirements of Law and
     Contractual Obligations applicable to it, except to the extent that the
     failure to comply therewith would not have a material adverse effect; and

          (e) This Guarantee constitutes the legal, valid and binding obligation
     of the Guarantor enforceable in accordance with its terms (except as may be
     limited by bankruptcy, insolvency or other similar laws affecting the
     enforcement of creditors' rights generally and general principles of
     equity).

     10.  Authority of Collateral Agent.  The Guarantor acknowledges that the
          -----------------------------
rights and responsibilities of the Collateral Agent under this Guarantee with
respect to any action taken by the Collateral Agent or the exercise or non-
exercise by the Collateral Agent of any option, right, request, judgment or
other right or remedy provided for herein or resulting or arising out of this
Guarantee shall, as between the Collateral Agent and the Lenders, be governed by
the Collateral Agency and Intercreditor Agreement and by such other agreements
with respect thereto as may exist from time to time among them, but, as between
the Collateral Agent and the Guarantor, the Collateral Agent shall be
conclusively presumed to be acting as agent for the Lenders with full and valid
authority so to act or refrain from acting, and the Guarantor shall not be under
any obligation, or entitlement, to make any inquiry respecting such authority.

     11.  Notices.  All notices, requests and demands to or upon the Collateral
          -------
Agent, the Lenders or the Guarantor to be effective shall be in writing (or by
telex, fax or similar electronic
<PAGE>
 
                                                                               8

transfer confirmed in writing) and shall be deemed to have been duly given or
made (i) when delivered by hand or (ii) if given by mail, when deposited in the
mails by certified mail, return receipt requested, or (iii) if by telex, fax or
similar electronic transfer, when sent and receipt has been confirmed, addressed
as follows:

          (a) if to the Lenders, at the  address or transmission number for
     notices provided in Schedule 1.1(b) of the Credit Agreement;

          (b) if to the Collateral Agent, at the address or transmission number
     for notices provided in the Collateral Agency and Intercreditor Agreement;
     and

          (c) if to the Guarantor, at its address or transmission number for
     notices set forth under its signature below.

     The Collateral Agent, the Lenders and the Guarantor may change its address
and transmission numbers for notices in the manner provided in this Section.

     12.  Severability.  Any provision of this Guarantee which 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.

     13.  Integration. This Guarantee represents the agreement of the Guarantor
          -----------
with respect to the subject matter hereof and there are no promises,
undertakings, representations or warranties by the Collateral Agent or any
Lender relative to subject matter hereof not expressly set forth or referred to
in this Guarantee.  This Guarantee supersedes any and all prior agreements and
understandings, oral or written, relative or with respect to the subject matter
hereof, and there are no promises, undertakings, representations or warranties
by the Collateral Agent or any Lender relative to the subject matter hereof not
expressly set forth or referred to herein.

     14.  Amendments in Writing; No Waiver; Cumulative Remedies.  (a)  Except as
          -----------------------------------------------------
provided in Section 2(b), none of the terms or provisions of this Guarantee may
be waived, amended, supplemented or otherwise modified except by a written
instrument executed by the Guarantor and the Collateral Agent, provided that any
                                                               --------  
provision of this Guarantee may be waived by the Collateral Agent and the
Lenders in a letter or agreement executed by the Collateral Agent or by telex or
facsimile transmission from the Collateral Agent.

     (b)  Neither the Collateral Agent nor any Lender shall by any act (except
by a written instrument pursuant to paragraph (a)), delay, indulgence, omission
                                    ------------- 
or otherwise be deemed to have waived any right or remedy hereunder or to have
acquiesced in any Default or Event of Default or in any breach of any of the
terms and conditions hereof.  No failure to exercise, nor any delay in
exercising, on the part of the Collateral Agent or any Lender, any right, power
or
<PAGE>
 
                                                                               9

privilege hereunder shall operate as a waiver thereof.  No single or partial
exercise of any right, power or privilege hereunder shall preclude any other or
further exercise thereof or the exercise of any other right, power or privilege.
A waiver by the Collateral Agent or any Lender of any right or remedy hereunder
on any one occasion shall not be construed as a bar to any right or remedy which
the Collateral Agent or such Lender would otherwise have on any future occasion.

     (c) The rights and remedies herein provided are cumulative, may be
exercised singly or concurrently and are not exclusive of any other rights or
remedies provided by law.

     15.  Section Headings.  The section headings used in this Guarantee are for
          ----------------
convenience of reference only and are not to affect the construction hereof or
be taken into consideration in the interpretation hereof.

     16.  Governing Law.  This Guarantee shall be governed by, and construed
          -------------
and interpreted in accordance with, the law of the State of New York.
<PAGE>
 
     IN WITNESS WHEREOF, the undersigned has caused this Guarantee to be duly
executed and delivered by its duly authorized officer as of the day and year
first above written.

                                    EDISON MISSION ENERGY


                                    By
                                      ----------------------------
                                      Name:
                                      Title:

                                    Address for Notices:

                                    18101 Von Karman Avenue
                                    Suite 1700
                                    Irvine, CA  92612-1046

                                    Attention:  Treasurer

                                    Telex:  (949) 752-5588
                                    Fax:  (949) 752-5624

<PAGE>
 
                                                                   EXHIBIT 10.61


                                                                  EXECUTION COPY
                                CREDIT AGREEMENT

                           dated as of March 18, 1999

                                     among

                             EDISON MISSION ENERGY

                                      and

                    CERTAIN COMMERCIAL LENDING INSTITUTIONS,

                                      And

                               CITICORP USA, INC.

                  as the Administrative Agent for the Lenders

                                  Arranged by

               CREDIT SUISSE FIRST BOSTON, LEHMAN BROTHERS INC.,
                 SALOMON SMITH BARNEY INC. and SOCIETE GENERALE


                                      -i-
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------

<TABLE>
<S>                                                                                              <C>
ARTICLE I
DEFINITIONS AND ACCOUNTING TERMS...............................................................      -1-
          1.1  Defined Terms...................................................................      -1-
          1.2  Use of Defined Terms............................................................     -12-
          1.3  Cross-References................................................................     -12-
          1.4  Accounting and Financial Determinations.........................................     -12-

ARTICLE II
COMMITMENTS AND BORROWING PROCEDURES...........................................................     -13-
          2.1  Commitments.....................................................................     -13-
            2.1.1  Commitments.................................................................     -13-
            2.1.2  Lenders Not Required To Make Loans..........................................     -13-
          2.2  Reduction of the Total Commitment Amount........................................     -13-
          2.3  Borrowing Procedure.............................................................     -13-
          2.4  Continuation and Conversion Elections...........................................     -14-
          2.5  Funding.........................................................................     -14-
          2.6  Renewal of Commitments..........................................................     -15-

ARTICLE III
REPAYMENTS, PREPAYMENTS, INTEREST AND FEES.....................................................     -15-
          3.1  Repayments and Prepayments......................................................     -15-
            3.1.1  Optional Prepayments........................................................     -15-
          3.2  Interest Provisions.............................................................     -16-
            3.2.1  Rates.......................................................................     -16-
            3.2.2  Post-Maturity Rates; Default Rates..........................................     -17-
            3.2.3  Payment Dates...............................................................     -17-
            3.2.4  Interest Rate Determination.................................................     -18-
          3.3  Fees............................................................................     -18-
            3.3.1  Facility Fee................................................................     -18-
            3.3.2  Utilization Fee.............................................................     -18-
            3.3.3  Administrative Agent's Fee and Miscellaneous Fees...........................     -18-

ARTICLE IV
CERTAIN LIBO RATE AND OTHER PROVISIONS.........................................................     -18-
          4.1  LIBO Rate Lending Unlawful......................................................     -18-
          4.2  Inability to Determine Rates....................................................     -19-
          4.3  Increased LIBO Rate Loan Costs..................................................     -19-
          4.4  Obligation to Mitigate..........................................................     -20-
          4.5  Funding Losses..................................................................     -20-
          4.6  Increased Capital Costs.........................................................     -21-
</TABLE>

                                      -ii-
<PAGE>
<TABLE>
                                                                                                    Page

<S>                                                                                                <C>
          4.7   Taxes..........................................................................     -21-
          4.8   Payments, Computations.........................................................     -23-
          4.9   Sharing of Payments............................................................     -23-
          4.10  Setoff........................................................................      -24-
          4.11  Replacement of Lender.........................................................      -24-

ARTICLE V
CONDITIONS TO LOANS...........................................................................      -25-
          5.1 Conditions to Effectiveness.....................................................      -25-
             5.1.1  Delivery of Loan Documents................................................      -25-
             5.1.2  Officer's Certificate.....................................................      -25-
             5.1.3  Resolutions...............................................................      -25-
             5.1.4  Opinions of Counsel.......................................................      -25-
             5.1.5  Closing Fees, Expenses....................................................      -25-
             5.1.6  Financial Statements......................................................      -26-
             5.1.7  Debt Ratings..............................................................      -26-
          5.2   All Loans.....................................................................      -26-
             5.2.1  Representations and Warranties; No Default.................................     -26-
             5.2.2  Borrowing Request..........................................................     -26-
             5.2.3  Satisfactory Legal Form....................................................     -26-

ARTICLE VI
REPRESENTATIONS AND WARRANTIES................................................................      -27-
          6.1   Organization; Power; Compliance with Law and Contractual Obligations...........     -27-
          6.2   Due Authorization; Non-Contravention...........................................     -27-
          6.3   Governmental Approval; Regulation..............................................     -27-
          6.4   Validity.......................................................................     -28-
          6.5   Financial Information..........................................................     -28-
          6.6   No Material Adverse Change.....................................................     -28-
          6.7   Litigation.....................................................................     -28-
          6.8   Ownership of Properties........................................................     -28-
          6.9   Taxes..........................................................................     -28-
          6.10  Pension and Welfare Plans.....................................................      -28-
          6.11  Environmental Warranties......................................................      -29-
          6.12  Regulations T, U and X........................................................      -30-
          6.13  Accuracy of Information.......................................................      -30-
          6.14  The Obligations...............................................................      -30-
          6.15  Year 2000 Matters.............................................................      -30-
</TABLE>

                                     -iii-
<PAGE>
 
<TABLE>
                                                                                                      Page
<S>                                                                                                   <C>
ARTICLE VII
COVENANTS........................................................................................     -30-
          7.1  Affirmative Covenants.............................................................     -30-
            7.1.1  Financial Information, Reports................................................     -30-
            7.1.2  Compliance with Laws..........................................................     -32-
            7.1.3  Maintenance of Properties.....................................................     -32-
            7.1.4  Insurance.....................................................................     -32-
            7.1.5  Books and Records.............................................................     -32-
            7.1.6  Environmental Covenant........................................................     -33-
            7.1.7  Conduct of Business and Maintenance of Existence..............................     -33-
            7.1.8  Year 2000 Matters.............................................................     -33-
            7.1.9  Use of Proceeds...............................................................     -33-
          7.2  Negative Covenants................................................................     -33-
            7.2.1  Restrictions on Secured Indebtedness..........................................     -34-
            7.2.2  [Reserved]....................................................................     -34-
            7.2.3  Liens.........................................................................     -34-
            7.2.4  Financial Condition...........................................................     -35-
            7.2.5  Investments...................................................................     -35-
            7.2.6  Consolidation, Merger.........................................................     -36-
            7.2.7  Asset Dispositions............................................................     -36-
            7.2.8  Transactions with Affiliates..................................................     -37-
            7.2.9  Restrictive Agreements........................................................     -37-
          7.3  ERISA.............................................................................     -37-

ARTICLE VIII
EVENTS OF DEFAULT................................................................................     -37-
          8.1  Listing of Events of Default......................................................     -37-
            8.1.1  Non-Payment of Obligations....................................................     -37-
            8.1.2  Breach of Warranty............................................................     -37-
            8.1.3  Non-Performance of Certain Covenants and Obligations..........................     -38-
            8.1.4 Non-Performance of Other Covenants and Obligations.............................     -38-
            8.1.5  Default on Other Indebtedness.................................................     -38-
            8.1.6  Judgments.....................................................................     -38-
            8.1.7  Pension Plans.................................................................     -38-
            8.1.8  Control of the Borrower.......................................................     -39-
            8.1.9  Bankruptcy, Insolvency........................................................     -39-
          8.2  Action if Bankruptcy..............................................................     -39-
          8.3  Action if Other Event of Default..................................................     -39-
          8.4  Rescission of Declaration.........................................................     -40-
</TABLE>

                                     -iv-
<PAGE>
 
<TABLE>  
<CAPTION> 
                                                                                                      Page
<S>                                                                                                   <C>
ARTICLE IX
THE AGENT........................................................................................     -40-
          9.1  Actions...........................................................................     -40-
          9.2  Funding Reliance..................................................................     -41-
          9.3  Exculpation.......................................................................     -41-
          9.4  Successor.........................................................................     -42-
          9.5  Loans by CUSA.....................................................................     -42-
          9.6  Reliance by Administrative Agent..................................................     -42-
          9.7  Notice of Default.................................................................     -43-
          9.8  Credit Decisions..................................................................     -43-
          9.9  Copies............................................................................     -43-
ARTICLE X
MISCELLANEOUS PROVISIONS.........................................................................     -44-
          10.1  Waivers, Amendments..............................................................     -44-
          10.2  Notices..........................................................................     -44-
          10.3  Payment of Costs and Expenses....................................................     -45-
          10.4  Indemnification..................................................................     -45-
          10.5  Survival.........................................................................     -46-
          10.6  Severability.....................................................................     -47-
          10.7  Headings.........................................................................     -47-
          10.8  Execution in Counterparts........................................................     -47-
          10.9  Governing Law; Entire Agreement..................................................     -47-
          10.10  Successors and Assigns..........................................................     -47-
          10.11  Sale and Transfer of Loans and Notes; Participations in Loans and Notes.........     -47-
            10.11.1  Assignments.................................................................     -47-
            10.11.2  Participations..............................................................     -49-
          10.12  Other Transactions..............................................................     -50-
          10.13  Submission To Jurisdiction; Waivers.............................................     -50-
          10.14  WAIVERS OF JURY TRIAL...........................................................     -51-
          10.15  Non-Recourse Persons............................................................     -51-
          10.16  Acknowledgments.................................................................     -51-
          10.17  Confidentiality.................................................................     -51-
</TABLE>


                                      -v-
<PAGE>
 
Annex I -    Pricing Grid

SCHEDULES

1.1(a)-      Commitments
1.1(b)-      Addresses for Notices and Lending Offices

EXHIBITS

A     -      Form of Note                           
B     -      Form of Borrowing Request              
C     -      Form of Continuation/Conversion Notice 
D     -      Form of Lender Assignment Agreement     

                                      -vi-
<PAGE>
 
          CREDIT AGREEMENT, dated as of March 18, 1999, among EDISON MISSION
ENERGY, a California corporation (the "Borrower"), the various financial
                                       --------
institutions as are or may become parties hereto (collectively, the "Lenders")
                                                                     -------
and CITICORP USA, INC. ("CUSA"), as administrative agent for the Lenders (in
                         ----
such capacity, the "Administrative Agent").
                    --------------------

                                    RECITALS
                                    --------

          A.  The Borrower has requested that the Lenders establish a credit
facility to provide liquidity support for the Borrower's commercial paper
program and for general corporate purposes; and

          B.  The Lenders are willing to make such credit facility available
upon and subject to the terms and conditions hereinafter set forth;

          NOW, THEREFORE, the parties hereto agree as follows:

                                   ARTICLE I
                        DEFINITIONS AND ACCOUNTING TERMS

          SECTION 1.1  Defined Terms.  The following terms (whether or not
                       -------------
underscored) when used in this Agreement, including its preamble and recitals,
shall, except where the context otherwise requires, have the following meanings
(such meanings to be equally applicable to the singular and plural forms
thereof):

          "Administrative Agent" means CUSA in its capacity as administrative
           --------------------
agent for the Lenders hereunder, and includes each other Person as may have
subsequently been appointed as the successor Administrative Agent pursuant to
Section 9.4.
- -----------

          "Affiliate" of any Person means any other Person which, directly or
           ---------
indirectly, controls, is controlled by or is under common control with such
Person (excluding any trustee under, or any committee with responsibility for
administering, any Pension Plan or Welfare Plan).  A Person shall be deemed to
be "controlled by" any other Person if such other Person possesses, directly or
indirectly, power to direct or cause the direction of the management and
policies of such Person whether by contract or otherwise.

          "Agent-Related Persons" means CUSA and any successor agent arising
           ---------------------
under Section 9.4, together with their respective Affiliates, and the officers,
      -----------
directors, employees, agents and attorneys-in-fact of such Persons and
Affiliates.

          "Agreement" means, on any date, this Credit Agreement as originally in
           ---------
effect on the Effective Date and as thereafter from time to time amended,
supplemented, amended and restated, or otherwise modified and in effect on such
date.

          "Alternate Base Rate" means, on any date and with respect to all Base
           -------------------
Rate Loans, a fluctuating rate of interest per annum equal to the higher of:
<PAGE>
 
          (a)  the rate of interest in effect for such day as publicly announced
  from time to time by the Administrative Agent at its principal office in New
  York, New York, as its "base rate" (or such other term used by any successor
  Administrative Agent).  The "base rate" is a rate set by the Administrative
  Agent based upon various factors including the Administrative Agent's cost and
  desired return, general economic conditions and other factors, and is used as
  a reference point for pricing some loans, which may be priced at, above, or
  below such announced rate; or

          (b)  the Federal Funds Rate most recently determined by the
     Administrative Agent plus 1/2 of 1%.

The Alternate Base Rate is not necessarily intended to be the lowest rate of
interest determined by the Administrative Agent in connection with extensions of
credit.  Changes in the rate of interest on that portion of any Loans maintained
as Base Rate Loans will take effect simultaneously with each change in the
Alternate Base Rate. The Administrative Agent will give notice promptly to the
Borrower and the Lenders of changes in the Alternate Base Rate.

          "Applicable Margin" means, for any day with respect to any LIBO Rate
           -----------------
Loans or Base Rate Loans, the rate per annum in effect for such day based on the
Borrower's Debt Rating for such day determined as provided in the Pricing Grid.

          "Authorized Representative" means, relative to the Borrower, those of
           -------------------------
its officers and employees whose signatures and incumbency shall have been
certified to the Administrative Agent and the Lenders pursuant to Section 5.1.3.
                                                                  -------------

          "Base Rate Loan" means a Loan bearing interest at a fluctuating rate
           --------------
determined by reference to the Alternate Base Rate plus the Applicable Margin
from time to time in effect.  

          "Borrower" has the meaning set forth in the preamble.
           --------                                   --------

          "Borrowing" means Loans of the same type and, in the case of LIBO Rate
           ---------
Loans having the same Interest Period, made by all Lenders on the same Business
Day and pursuant to the same Borrowing Request in accordance with Section 2.l.
                                                                  -----------

          "Borrowing Date" means any Business Day specified in a notice pursuant
           --------------
to Section 2.3 as a date which the Borrower requests the Lenders to make Loans.
   -----------

          "Borrowing Request" means a loan request and certificate duly executed
           -----------------
by an Authorized Representative of the Borrower, substantially in the form of
Exhibit B.
- ---------

          "Business Day" means:
           ------------

          (a)  any day which is neither a Saturday or Sunday nor a legal holiday
     on which banks are authorized or required to be closed in New York, New
     York; and

                                      -2-
<PAGE>
 
          (b)  relative to the making, continuing, prepaying or repaying of any
     LIBO Rate Loans, any day on which dealings in Dollars are carried on in the
     London interbank market.

          "Capitalized Lease Liabilities" of any Person means all monetary
           -----------------------------
obligations of such Person under any leasing or similar arrangement which, in
accordance with GAAP, would be classified as capitalized leases, and, for
purposes of each Loan Document, the amount of such obligations shall be the
capitalized amount thereof, determined in accordance with GAAP.

          "Cash Equivalent Investment" means, at any time:
           --------------------------

          (a)  any evidence of Indebtedness, maturing not more than one year
     after such time, issued or guaranteed by the United States Government or an
     agency thereof; or

          (b)  other investments in securities or bank instruments rated at
     least "A" by S&P and "A2" by Moody's or "A-1" by S&P and "P-1" by Moody's
     and with maturities of less than 366 days; or

          (c)  other securities as to which the Borrower has demonstrated, to
     the satisfaction of the Administrative Agent, adequate liquidity through
     secondary markets or deposit agreements.

          "CERCLIS" means the Comprehensive Environmental Response Compensation
           -------
Liability Information System List.

          "Change in Control" means the failure of Edison International to own,
           -----------------
directly or indirectly, at least 50.l% of the outstanding shares of voting stock
of the Borrower (or any successor pursuant to Section 7.2.6(c)) on a fully
                                              ----------------
diluted basis.

          "Code" means the Internal Revenue Code of 1986, as amended.
           ----

          "Commitment" has the meaning set forth in Section 2.1.1.
           ----------                               -------------

          "Commitment Termination Date" means the earliest of:
           ---------------------------

          (a) the date which is 364 days after the Effective Date or, if such
     date has been extended by any Lender pursuant to Section 2.7, then, with
                                                      -----------
     respect to the Commitment of such Lender, such date as determined pursuant
     to Section 2.7;
        -----------

          (b) the date on which the Total Commitment Amount is terminated in
     full or reduced to zero pursuant to Section 2.2; or
                                         -----------

          (c) the date on which any Commitment Termination Event occurs.


          "Commitment Termination Event" means:
           ----------------------------

                                      -3-
<PAGE>
 
          (a) the occurrence of any Default described in clauses (a) through (e)
                                                         -----------         ---
     of Section 8.1.9 with respect to the Borrower; or
        -------------

          (b) the occurrence and continuance of any other Event of Default and
     the declaration of the Loans to be due and payable pursuant to Section 8.3.
                                                                    -----------

          "Committed Loan" means a Loan made pursuant to Section 2.1.
           --------------                                -----------

          "Contingent Liability" means any agreement, undertaking or arrangement
           --------------------
by which any Person guarantees, endorses or otherwise becomes or is contingently
liable upon (by direct or indirect agreement, contingent or otherwise, to
provide funds for payment, to supply funds to, or otherwise to invest in, a
debtor, or otherwise to assure a creditor against loss) the indebtedness,
obligation or any other liability of any other Person (other than by
endorsements of instruments in the course of collection), or guarantees the
payment of dividends or other distributions upon the shares of any other Person.
The amount of any Person's obligation under any Contingent Liability shall
(subject to any limitation set forth therein) be deemed to be the outstanding
principal amount of the debt, obligation or other liability guaranteed thereby;
provided, however, that if the maximum amount of the debt, obligation or other
- --------  -------
liability guaranteed thereby has not been established, the amount of such
Contingent Liability shall be the maximum reasonably anticipated amount of the
debt, obligation or other liability; provided, further, however, that any
                                     --------  -------
agreement to limit the maximum amount of such Person's obligation under such
Contingent Liability shall not, of and by itself, be deemed to establish the
maximum reasonably anticipated amount of such debt, obligation or other
liability.

          "Continuation/Conversion Notice" means a notice of continuation or
           ------------------------------
conversion and certificate duly executed by an Authorized Representative of the
Borrower, substantially in the form of Exhibit C.
                                       ---------

          "Contractual Obligation" means, 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.

          "Controlled Group" means all members of a controlled group of
           ----------------
corporations and all members of a controlled group of trades or businesses
(whether or not incorporated) under common control which, together with the
Borrower, are treated as a single employer under Section 414(b) or 414(c) of the
Code or Section 4001 of ERISA.

          "CUSA" has the meaning set forth in the preamble.
           ----                                   --------

          "Debt Rating" means a rating of the Borrower's long-term debt which is
           -----------
not secured or supported by a guarantee, letter of credit or other form of
credit enhancement.  If Moody's or S&P shall have changed its system of
classifications after the date hereof, the Borrower's Debt Rating shall be
considered to be at or above a specified level if it is at or above the new
rating which most closely corresponds to the specified level under the old
rating system.


                                      -4-
<PAGE>
 
          "Declining Lenders" has the meaning set forth in Section 2.6.
           -----------------                               -----------

          "Default" means any Event of Default or any condition, occurrence or
           -------
event which, after notice or lapse of time or both, would constitute an Event of
Default.

          "Dollar" and the sign "$" mean lawful money of the United States.
           ------

          "Domestic Office" means, relative to any Lender, the office of such
           ---------------
Lender designated on Schedule 1.1(b) or designated in the Lender Assignment
                     ---------------
Agreement or such other office of a Lender (or any successor or assign of such
Lender) within the United States as may be designated from time to time by
notice from such Lender, as the case may be, to each other Person party hereto.
A Lender may have separate Domestic Offices for purposes of making, maintaining
or continuing, as the case may be, Base Rate Loans.

          "Edison International" means Edison International, a California
           --------------------
corporation.

          "Effective Date" means the date this Agreement becomes effective
           --------------
pursuant to Section 5.1.
            -----------

          "Eligible Assignee" means (a) a commercial bank organized or licensed
           -----------------
under the laws of the United States, or any state thereof, and having a combined
capital and surplus of at least $250,000,000; and (b) a Person that is primarily
engaged in the business of commercial banking and that is (i) a Subsidiary of a
Lender, (ii) a Subsidiary of a Person of which a Lender is a Subsidiary or (iii)
a Person of which a Lender is a Subsidiary.

          "Environmental Laws" means all applicable federal, state or local
           ------------------
statutes, laws, ordinances, codes, rules, regulations and guidelines (including
consent decrees and administrative orders) relating to Hazardous Materials
and/or to public health and protection of the environment, including the
Comprehensive Environmental Response, Compensation and Liability Act of 1980, as
amended, and the Resource Conservation and Recovery Act, as amended.

          "ERISA" means the Employee Retirement Income Security Act of 1974, as
           -----
amended, and any successor statute of similar import, together with the
regulations thereunder, in each case as in effect from time to time.  References
to sections of ERISA also refer to any successor sections.

          "Event of Default" has the meaning set forth in Section 8.1.
           ----------------                               -----------

          "Extending Lenders" has the meaning set forth in Section 2.6.
           -----------------                               -----------

          "Facility Fee" has the meaning set forth in Section 3.3.1.
           ------------                               -------------

          "Federal Funds Rate" means, for any period, a fluctuating interest
           ------------------
rate per annum equal for each day during such period to:

                                      -5-
<PAGE>
 
          (a)  the weighted average of the rates on overnight federal funds
     transactions with members of the Federal Reserve System arranged by federal
     funds brokers, as published for such day (or, if such day is not a Business
     Day, for the next preceding Business Day) by the Federal Reserve Bank of
     New York; or

          (b)  if such rate is not so published for any day which is a Business
     Day, the average of the quotations for such day on such transactions
     received by the Administrative Agent from not less than three of the Lead
     Arrangers (or if quotations are unavailable from any of them, up to three
     federal funds brokers of recognized standing selected by the Administrative
     Agent).

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

          "Fiscal Year" means any period of twelve consecutive calendar months
           -----------
ending on December 31; references to a Fiscal Year with a number corresponding
to any calendar year (e.g., the "1999 Fiscal Year") referred to the Fiscal Year
                      ----
ending on December 31 occurring during such calendar year.

          "F.R.S. Board" means the Board of Governors of the Federal Reserve
           ------------
System or any successor thereto.

          "GAAP" has the meaning set forth in Section 1.4.
           ----                               -----------

          "Governmental Approval" has the meaning set forth in Section 6.3.
           ---------------------                               -----------

          "Hazardous Material" means:
           ------------------

          (a) any "hazardous substance", as defined by any Environmental Law;

          (b) any "hazardous waste", as defined by any Environmental Law;

          (c)  any petroleum product; or

          (d) any pollutant or contaminant or hazardous, dangerous or toxic
     chemical, material or substance within the meaning of any Environmental
     Law.

          "herein", "hereof", "hereto", "hereunder" and similar terms contained
           ------    ------    ------    --------- 
in any Loan Document refer to such Loan Document as a whole and not to any
particular Section, paragraph or provision of such Loan Document.

          "including" means including without limiting the generality of any
           ---------
description preceding such term, and, for purposes of each Loan Document, the
parties thereto agree that the rule of ejusdem generis shall not be applicable
                                       ---------------
to limit a general statement, which is followed by or referable to an
enumeration of specific matters, to matters similar to the matters specifically
mentioned.

                                      -6-
<PAGE>
 
          "Indebtedness" of any Person means, without duplication:
           ------------

          (a) all indebtedness for borrowed money;

          (b) all obligations issued, undertaken or assumed as the deferred
     purchase price of property or services which purchase price is due more
     than six months from the date of incurrence of the obligation in respect
     thereof or is evidenced by a note or other instrument, except trade
     accounts arising in the ordinary course of business;

          (c) all reimbursement obligations with respect to surety bonds,
     letters of credit (to the extent not collateralized with cash or Cash
     Equivalent Investments), bankers' acceptances and similar instruments (in
     each case, whether or not matured);

          (d) all obligations evidenced by notes, bonds, debentures or similar
     instruments, including obligations so evidenced incurred in connection with
     the acquisition of property, assets or businesses;

          (e) all indebtedness created or arising under any conditional sale or
     other title retention agreement, or incurred as financing, in either case
     with respect to property acquired by the Person (even though the rights and
     remedies of the seller or bank under such agreement in the event of default
     are limited to repossession or sale of such property);

          (f)  all Capitalized Lease Liabilities;

          (g) all net obligations with respect to sales of foreign exchange
     options;

          (h) all indebtedness referred to in clauses (a) through (g) above
                                              -------  -           -
     secured by (or for which the holder of such Indebtedness has an existing
     right, contingent or otherwise, to be secured by) any Lien upon or in
     property (including accounts and contracts rights) owned by such Person,
     even though such Person has not assumed or become liable for the payment of
     such Indebtedness; and

          (i)  all Contingent Liabilities.

For all purposes of this Agreement, the Indebtedness of any Person shall include
the Indebtedness of any partnership or joint venture in which such Person is a
general partner or a joint venturer.

          "Initial Lenders" means CUSA, Credit Suisse First Boston, Lehman
           ---------------
Commercial Paper Inc. and Societe Generale.

          "Interest Period" means, relative to any LIBO Rate Loan, the period
           ---------------
beginning on (and including) the date on which such LIBO Rate Loan is made or
continued as, or converted into, a LIBO Rate Loan pursuant to Section 2.3 or
                                                              -----------
2.4  and shall end on (but exclude) the day which numerically corresponds to
- ---
such date one, two or three months thereafter (or, if such

                                      -7-
<PAGE>
 
month has no numerically corresponding day, on the last Business Day of such
month), in either case as the Borrower may select in its relevant notice
pursuant to Section 2.3 or  2.4 ; provided, however, that:
            -----------     ---   --------  -------

          (a)  the Borrower shall not be permitted to select Interest Periods to
     be in effect at any one time which have expiration dates occurring on more
     than ten different dates or such other larger number of dates and on such
     terms as may be agreed to by the Borrower and the Administrative Agent;

          (b)  Interest Periods commencing on the same date for Loans comprising
     part of the same Borrowing shall be of the same duration;

          (c)  if such Interest Period would otherwise end on a day which is not
     a Business Day, such Interest Period shall end on the next following
     Business Day (unless, if such Interest Period applies to LIBO Rate Loans,
     such next following Business Day is the first Business Day of a calendar
     month, in which case such Interest Period shall end on the Business Day
     next preceding such numerically corresponding day); and

          (d)  no Interest Period may end later than the date set forth in
     clause (a) of the definition of "Commitment Termination Date".
     ----------                       ---------------------------

          "Investment" means, relative to any Person:
           ----------

          (a) any loan or advance made by such Person to any other Person
     (excluding commission, travel and similar advances to officers and
     employees made in the ordinary course of business);

          (b) any Contingent Liability of such Person; and

          (c) any ownership or similar interest held by such Person in any other
Person.

The amount of any Investment shall be the original principal or capital amount
thereof less all returns of principal or equity thereon (and without adjustment
by reason of the financial condition of such other Person) and shall, if made by
the transfer or exchange of property other than cash, be deemed to have been
made in an original principal or capital amount equal to the fair market value
of such property.

          "Lead Arrangers" means Credit Suisse First Boston, Lehman Brothers
           --------------
Inc., Salomon Smith Barney Inc. and Societe Generale.

          "Lender Assignment Agreement" means a Lender Assignment Agreement,
           ---------------------------
substantially in the form of Exhibit D.
                             ---------

          "Lenders" has the meaning set forth in the preamble.
           -------                                   --------

                                      -8-
<PAGE>
 
          "LIBO Rate" has the meaning set forth in Section 3.2.1.
           ---------                               -------------

          "LIBO Rate Loan" means a Loan bearing interest, at all times during an
           --------------
Interest Period applicable to such Loan at a fixed rate of interest determined
by reference to the LIBO Rate.

          "LIBO Rate (Reserve Adjusted)" means, relative to any Loan to be made,
           ----------------------------
continued or maintained as, or converted into, a LIBO Rate Loan for any Interest
Period, a rate per annum (rounded upwards, if necessary, to the nearest whole
multiple of l/100 of 1%) determined pursuant to the following formula:

          LIBO Rate (Reserve Adjusted)   =                  LIBO Rate
                                                 -------------------------------
                                                 1.00 - LIBOR Reserve Percentage

          The LIBO Rate (Reserve Adjusted) for any Interest Period for LIBO Rate
Loans will be determined by the Administrative Agent on the basis of the LIBOR
Reserve Percentage in effect on, and the applicable rates furnished to and
received by the Administrative Agent, two Business Days before the first day of
such Interest Period.

          "LIBOR Office" means, relative to any Lender, the office of such
           ------------
Lender designated as such on Schedule 1.1(b) or designated in the Lender
                             ---------------
Assignment Agreement or such other office of a Lender as designated from time to
time by notice from such Lender to the Borrower and the Administrative Agent
pursuant to Section 4.4, whether or not outside the United States, which shall
            -----------
be making or maintaining LIBO Rate Loans of such Lender hereunder.

          "LIBOR Reserve Percentage" means, relative to any Interest Period for
           ------------------------
LIBO Rate Loans, the reserve percentage (expressed as a decimal) equal to the
aggregate reserve requirements (including all basic, emergency, supplemental,
marginal and other reserves and taking into account any transitional adjustments
or other scheduled changes in reserve requirements) specified under regulations
issued from time to time by the F.R.S. Board and then applicable to assets or
liabilities consisting of and including "Eurocurrency Liabilities", as currently
defined in Regulation D of the F.R.S. Board, having a term approximately equal
or comparable to such Interest Period.

          "Lien" means any security interest, mortgage, pledge, hypothecation,
           ----
assignment, deposit arrangement, encumbrance, lien (statutory or otherwise),
charge against or interest in property, in each case of any kind, to secure
payment of a debt or performance of an obligation.

          "Loan" means Loans made by the Lenders to the Borrower pursuant to
           ----
Section 2.1 including Base Rate Loans and LIBO Rate Loans.
- -----------

          "Loan Documents" means this Agreement, the Notes and the other
           --------------
agreements, documents and instruments delivered in connection with this
Agreement and the Notes, including the fee letter referred to in Section 3.3.3,
                                                                 -------------
each Borrowing Request and each Continuation/ Conversion Notice.

                                      -9-
<PAGE>
 
          "Material Adverse Effect" means any event, development or circumstance
           -----------------------
that has had or could reasonably be expected to have a material adverse effect
on (i) the business, assets, property, condition (financial or otherwise) or
operations of the Borrower and its subsidiaries, taken as a whole since the
Effective Date, or (ii) the ability of the Borrower to perform its obligations
under any of the Loan Documents.

          "Moody's" means Moody's Investors Service, a division of Dun &
           -------
Bradstreet Corporation, and its successors and assigns.

          "Net Tangible Assets" means, as of the date of any determination
           -------------------
thereof, the total amount of all assets of the Borrower and its Subsidiaries
(determined on a consolidated basis in accordance with GAAP), less the sum of
(a) the consolidated current liabilities of the Borrower and its Subsidiaries
(determined on a consolidated basis in accordance with GAAP) and (b) assets
properly classified as "intangible assets" in accordance with GAAP.

          "Non-Recourse Debt" means Indebtedness which the Borrower is not
           -----------------
directly or indirectly obligated to repay.

          "Non-Recourse Persons" means the Affiliates of the Borrower, including
           --------------------
The Mission Group, Edison International and Southern California Edison Company,
and the officers, directors, employees, shareholders, agents, Authorized
Representatives and other controlling persons of the Borrower or any of its
Affiliates, provided that in no event shall the Borrower be deemed to be a Non-
            --------
Recourse Person.

          "Note" means a promissory note of the Borrower payable to any Lender,
           ----
in the form of Exhibit A hereto (as such promissory note may be amended,
               ---------
endorsed or otherwise modified from time to time), evidencing the aggregate
Indebtedness of the Borrower to such Lender resulting from outstanding Loans,
and also means all other promissory notes accepted from time to time in
substitution therefor or renewal thereof.

          "Obligations" means all obligations (monetary or otherwise) of the
           -----------
Borrower arising under or in connection with the Loan Documents.

          "Organic Document" means, relative to the Borrower, its certificate of
           ----------------
incorporation, its by-laws and all shareholder agreements, voting trusts and
similar arrangements applicable to any of its authorized shares of capital
stock.

          "Participant" has the meaning set forth in Section 10.11.2.
           -----------                               ---------------

          "Partnership" means a general partnership, limited partnership, joint
           -----------
venture or similar entity in which the Borrower or a Subsidiary is a partner,
joint venturer or equity participant.

          "PBGC" means the Pension Benefit Guaranty Corporation and any entity
           ----
succeeding to any or all of its functions under ERISA.

                                      -10-
<PAGE>
 
          "Pension Plan" means a "pension plan", as such term is defined in
           ------------
Section 3(2) of ERISA, which is subject to Title IV of ERISA (other than a
multiemployer plan as defined in Section 4001(a)(3) of ERISA), and to which the
Borrower or any corporation, trade or business that is, along with the Borrower,
a member of a Controlled Group, has any liability, including any liability by
reason of having been a substantial employer within the meaning of Section 4063
of ERISA at any time during the preceding five years, or by reason of being
deemed to be a contributing sponsor under Section 4069 of ERISA.

          "Percentage" means, relative to any Lender, the percentage set forth
           ----------
on Schedule 1.1(a) opposite its name or set forth in the Lender Assignment
   ---------------
Agreement pursuant to which such Lender became a Lender hereunder, as such
percentage may be adjusted from time to time pursuant to any Lender Assignment
Agreement executed by such Lender and delivered pursuant to Section 10.11 or
                                                            -------------
adjusted from time to time pursuant to Section 2.6.
                                       -----------

          "Person" means any natural person, corporation, partnership, limited
           ------
liability company, firm, association, trust, government, governmental agency or
any other entity, whether acting in an individual, fiduciary or other capacity.

          "Pricing Grid" means the pricing grid attached as Annex I.
           ------------                                     -------

          "Quarterly Payment Date" means the last day of each March, June,
           ----------------------
September, and December or, if any such day is not a Business Day, the next
succeeding Business Day.  "Register" has the meaning set forth in Section
                                                                  -------
10.11.1.
- -------        

          "Required Lenders" means, at any time, Lenders holding at least 66%
           ----------------
of the then aggregate outstanding principal amount of the Loans, or, if no such
principal amount is then outstanding, Lenders having at least 66% of the Total
Commitment Amount.

          "S&P" means Standard & Poor's Ratings Services and its successors and
           ---
assigns.

          "Same Day Funds" means immediately available funds.
           --------------

          "Subordinated Debt" means all unsecured Indebtedness of the Borrower
           -----------------
for money borrowed which is subordinated, upon terms (including the terms
applicable to the payment, prepayment, redemption, purchase or defeasance
thereof) satisfactory to the Required Lenders, in right of payment to the
payment in full in cash of all Obligations.

          "Subsidiary" means, with respect to any Person, any corporation of
           ----------
which more than 50% of the outstanding capital stock having ordinary voting
power to elect a majority of the board of directors of such corporation
(irrespective of whether at the time capital stock of any other class or classes
of such corporation shall or might have voting power upon the occurrence of any
contingency) is at the time directly or indirectly owned by such Person, by such
Person and one or more other Subsidiaries of such Person, or by one or more
other Subsidiaries of such Person.

                                      -11-
<PAGE>
 
          "Tangible Net Worth" means the net worth of the Borrower and its
           ------------------
Subsidiaries (determined on a consolidated basis in accordance with GAAP) after
subtracting therefrom the aggregate amount of any intangible assets of the
Borrower and its Subsidiaries (determined on a consolidated basis in accordance
with GAAP), including goodwill, franchises, licenses, patents, trademarks, trade
names, copyrights, service marks and brand names.

          "Taxes" has the meaning set forth in Section 4.7.
           -----                               -----------

          "Total Commitment Amount" means, on any date, $700,000,000, as such
           -----------------------
amount may be reduced from time to time pursuant to Section 2.2 or Section 2.6.
                                                    -----------    -----------

          "type" means, relative to any Loan, the portion thereof, if any, being
           ----
maintained as a Base Rate Loan or a LIBO Rate Loan.

          "United States" or "U.S." means the United States of America, its
           -------------      ----
fifty States and the District of Columbia.

          "Utilization Fee" has the meaning set forth in Section 3.3.2.
           ---------------                               --------------

          "Welfare Plan" means a "welfare plan", as such term is defined in
           ------------           
Section 3(1) of ERISA.

          "Year 2000 Problem" means any significant risk that computer hardware,
           -----------------
software or equipment containing embedded microchips essential to the businesses
or operations of the Loan Parties will not, in the case of dates or time periods
occurring after December 31, 1999, function at least as effectively as in the
case of dates or time periods occurring prior to January 1, 2000.

          SECTION 1.2  Use of Defined Terms.  Unless otherwise defined or the
                       --------------------
context otherwise requires, terms for which meanings are provided in this
Agreement shall have such meanings when used in each Note, Borrowing Request,
Continuation/Conversion Notice, Loan Document, notice and other communication
delivered from time to time in connection with any Loan Document.

          SECTION 1.3  Cross-References.  Unless otherwise specified, references
                       ----------------
in this Agreement to any Article, Section, Annex, Exhibit or Schedule are
references to such Article, Section, Annex, Exhibit or Schedule of or to this
Agreement, and, unless otherwise specified, references in any Article, Section
or definition to any clause are references to such clause of such Article,
Section or definition.

          SECTION 1.4  Accounting and Financial Determinations.  Unless
                       ---------------------------------------
otherwise specified, all accounting terms used in any Loan Document shall be
interpreted, all accounting determinations and computations hereunder or
thereunder shall be made, and all financial statements required to be delivered
hereunder or thereunder shall be prepared in accordance with, those generally
accepted accounting principles in effect in the United States ("GAAP") applied
                                                                ----
in

                                      -12-
<PAGE>
 
the preparation of the financial statements referred to in Section 6.5, except
that quarterly financial statements are not required to contain footnotes.

                                   ARTICLE II
                      COMMITMENTS AND BORROWING PROCEDURES

          SECTION 2.1  Commitments.  On the terms and subject to the conditions
                       -----------
of this Agreement, each Lender severally agrees to make Loans pursuant to such
Lender's Commitment as provided in this Section 2.1.
                                        -----------

          SECTION 2.1.1  Commitments.  From time to time on any Business Day
                         -----------
occurring prior to the related Commitment Termination Date, each Lender
severally agrees to make Loans (each, a "Loan") to the Borrower equal to such
                                         ----
Lender's Percentage of the Borrowing of Loans requested or deemed to be
requested by the Borrower to be made on such day.  The commitment of each Lender
described in this Section 2.1.1 is herein referred to as its "Commitment".  The
                  -------------                               ----------
Borrower may from time to time borrow, prepay, in whole or in part, and reborrow
Loans. Commitments shall terminate automatically on the related Commitment
Termination Date.

          SECTION 2.1.2  Lenders Not Required To Make Loans.  No Lender shall be
                         ----------------------------------
required to make any Loan if, after giving effect thereto:

          (a) the aggregate outstanding principal amount of all Loans of all
     Lenders would exceed the Total Commitment Amount; or

          (b) the aggregate outstanding principal amount of all Loans of such
     Lender would exceed such Lender's Percentage of the Total Commitment
     Amount.

          SECTION 2.2  Reduction of the Total Commitment Amount.  The Borrower
                       ----------------------------------------
may, from time to time on any Business Day occurring after the Effective Date,
voluntarily reduce the Total Commitment Amount without premium or penalty
(subject, however, to Section 4.5); provided, however, that all such reductions
                      -----------   --------  -------
shall require at least one Business Days' prior notice to the Administrative
Agent and be permanent, and any partial reduction of the Total Commitment Amount
shall be in a minimum amount of $10,000,000 and in an integral multiple of
$1,000,000 in excess thereof; and, provided, further, that the Total Commitment
                                   --------  -------
Amount may not be reduced to an amount less than the aggregate amount of
outstanding Loans.

          SECTION 2.3  Borrowing Procedure.  By delivering a Borrowing Request
                       -------------------
to the Administrative Agent on or before 12:00 Noon, New York City time, on a
Business Day, the Borrower may from time to time irrevocably request, (i) on not
less than three Business Days' notice, in the case of LIBO Rate Loans, and (ii)
on the same Business Day, in the case of Base Rate Loans, that a Borrowing of
Loans be made in minimum amounts of $10,000,000, or in the unused amount of the
Total Commitment Amount.  On the terms and subject to the conditions of this
Agreement, each Borrowing shall be comprised of the same type of Loans, and
shall be made on the Business Day specified in such Borrowing Request.  On or
before 2:00 P.M., New York

                                      -13-
<PAGE>
 
City time, on the Business Day such Loans are to be made, each Lender shall
deposit with the Administrative Agent Same Day Funds in an amount equal to such
Lender's Percentage of the requested Borrowing.  Such deposit will be made to an
account which the Administrative Agent shall specify from time to time by notice
to the Lenders.  To the extent funds are received from the Lenders, the
Administrative Agent shall make such funds available to the Borrower by wire
transfer to the accounts the Borrower shall have specified in its Borrowing
Request.  No Lender's obligation to make any Loan shall be affected by any other
Lender's failure to make any Loan.

          SECTION 2.4  Continuation and Conversion Elections. By delivering a
                       -------------------------------------
Continuation/Conversion Notice to the Administrative Agent on or before 12:00
Noon, New York City time on a Business Day, the Borrower may from time to time
irrevocably elect that all, or any portion in an aggregate minimum amount of
$10,000,000 and an integral multiple of $1,000,000 in excess thereof, of any
Loans be (i) on not less than three Business Days' notice, converted into, or
continued as, LIBO Rate Loans, or (ii) on the same Business Day, be converted
into, or continued as a Base Rate Loan.  In the absence of delivery of a
Continuation/Conversion Notice with respect to any LIBO Rate Loan, such LIBO
Rate Loan shall automatically be continued as a LIBO Rate Loan with an Interest
Period of the same duration as the then expiring Interest Period; provided,
                                                                  --------
however, that (x) each such conversion or continuation shall be pro rated among
- -------                         
the applicable outstanding Loans of all Lenders, (y) a LIBO Rate Loan may not be
converted at any time other than the last day of the Interest Period applicable
thereto and (z) no portion of the outstanding principal amount of any Loans may
be continued as, or be converted into, LIBO Rate Loans when any Default or Event
of Default under Section 8.1.1 has occurred and is continuing.  Each delivery of
                 -------------
a Continuation/Conversion Notice shall constitute a certification and warranty
by the Borrower that on the date of delivery of such notice no Default has
occurred and is continuing.  If prior to the time of such continuation or
conversion any matter certified to by the Borrower by reason of the immediately
preceding sentence will not be true and correct at such time if then made, the
Borrower will immediately so notify the Administrative Agent. Except to the
extent, if any, that prior to the time of such continuation or conversion the
Administrative Agent shall have received written notice to the contrary from the
Borrower, such certification and warranty shall be deemed to be made at the date
of such continuation or conversion as if then made.  Upon the occurrence and
during the continuance of any Event of Default under Section 8.1.1, each LIBO
                                                     -------------
Rate Loan shall convert automatically to a Base Rate Loan at the end of the
Interest Period then in effect for such LIBO Rate Loan.

          SECTION 2.5  Funding.  Each Lender may, if it so elects, fulfill its
                       -------
obligation to make, continue or convert LIBO Rate Loans hereunder by causing one
of its foreign branches or Affiliates (or an international banking facility
created by such Lender) to make or maintain such LIBO Rate Loan; provided,
                                                                 --------
however, that such LIBO Rate Loan shall nonetheless be deemed to have been made
- -------
and to be held by such Lender, and the obligation of the Borrower to repay such
LIBO Rate Loan shall nevertheless be to such Lender for the account of such
foreign branch, Affiliate or international banking facility.  In addition, the
Borrower hereby consents and agrees that, for purposes of any determination to
be made for purposes of Sections 4.1, 4.2, 4.3, 4.4, or 4.5, it shall be
                        ------------  ---  ---  ---     ---
conclusively assumed that each Lender elected to fund all LIBO Rate Loans by
purchasing deposits in its LIBOR Office's interbank eurodollar markets.

                                      -14-
<PAGE>
 
          SECTION 2.6  Renewal of Commitments.  The Borrower may request that
                       ----------------------
each Lender's Commitments be renewed by providing notice of such requests to the
Administrative Agent no earlier than 45 days but no later than 30 days prior to
the then existing Commitment Termination Date applicable to such Lenders.  If a
Lender agrees, in its individual and sole discretion, to renew its Commitment,
such Lender (an "Extending Lender") will notify the Administrative Agent, in
                 ----------------
writing, of its decision to do so no earlier than 30 days prior to the then
existing Commitment Termination Date applicable to such Lender (but in any event
no later than 20 days prior to the then existing Commitment Termination Date).
Notwithstanding any provision of this Agreement to the contrary, any notice by
any Lender of its willingness to renew its Commitment shall be revocable by such
Lender in its sole and absolute discretion at any time prior to the date which
is 20 days prior to the related Commitment Termination Date then in effect. The
Administrative Agent will notify the Borrower, in writing, of each Lender's
decisions no later than 15 days prior to the then existing Commitment
Termination Date applicable to such Lender.  The Extending Lenders' Commitments
will be renewed for an additional 364 days from the then existing Commitment
Termination Date applicable to such Lenders, provided   that (i) each extension
                                             --------
of the Commitment Termination Date pursuant to this Section 2.6 shall be for a
                                                    -----------
maximum of 364 days and (ii) more than 50% of the Total Commitment Amount as of
the Commitment Termination Date then in effect is extended or otherwise
committed to by Extending Lenders and any new Lenders.  Any Lender that declines
the Borrower's request for a Commitment renewal (a "Declining Lender") will have
                                                    ----------------
its Commitment terminated on the then existing Commitment Termination Date
applicable to such Lender (without regard to any renewals by other Lenders),
unless terminated earlier in accordance with this Agreement.  The Borrower will
have the right to accept Commitments from third party financial institutions
acceptable to the Administrative Agent in an amount up to the amount of the pre-
termination Commitments of any Declining Lenders, provided that the Extending
                                                  --------
Lenders will have the right to increase their Commitments up to the amount of
the Declining Lenders' Commitments before the Borrower will be permitted to
substitute other financial institutions for the Declining Lenders.

                                  ARTICLE III
                   REPAYMENTS, PREPAYMENTS, INTEREST AND FEES

          SECTION 3.1  Repayments and Prepayments.  The Loans of each Lender
                       --------------------------
shall mature, and the Borrower unconditionally promises to pay in full the
unpaid principal amount of such Loan to the Administrative Agent, for the
account of such Lender, on the Commitment Termination Date for such Lender.

          SECTION 3.1.1  Optional Prepayments.    (a)  At any time, and from
                         --------------------
time to time, the Borrower may, on any Business Day, make a voluntary
prepayment, in whole or in part, of the outstanding principal amount of the
Loans; provided, however, that:
       --------  -------

          (i)  any such prepayment made shall be applied pro rata among Loans of
                                                         --- ----
     the same type and, if applicable, having the same Interest Period;

                                      -15-
<PAGE>
 
          (ii)  any such prepayment of any LIBO Rate Loan made on any day other
     than the last day of the Interest Period for such Loan shall be subject to
     the provisions of Section 4.5;
                       -----------

          (iii)  any such prepayment of LIBO Rate Loans shall require at least
     two Business Days' prior written notice to the Administrative Agent and any
     such prepayment of Base Rate Loans may be made on same day's written notice
     to the Administrative Agent; and

          (iv)  any such partial prepayment of Loans shall be in an aggregate
     minimum amount of $10,000,000 and an integral multiple of $1,000,000 in
     excess thereof.

          (b)  The Borrower shall, immediately upon any acceleration of any
Loans pursuant to Section 8.2 or Section 8.3,  repay all Loans, unless,
                  -----------    -----------
pursuant to Section 8.3, only a portion of all Loans is so accelerated.
            -----------

          (c) Each prepayment of Loans made pursuant to this Section 3.1.1 shall
                                                             -------------
be  accompanied by accrued interest to the date of such prepayment on the amount
prepaid, but shall be without premium or penalty, except as may be required by
Section 4.5.  No prepayment of principal of any Loan pursuant to Section
- -----------                                                      -------
3.1.1(a) shall cause a reduction in the Total Commitment Amount.
- --------

          SECTION 3.2  Interest Provisions.  Interest on the outstanding
                       -------------------
principal amount of Loans shall accrue and be payable in accordance with this
Section 3.2.
- -----------

          SECTION 3.2.1  Rates.  (a)  Pursuant to an appropriately delivered
                         -----
Borrowing Request or Continuation/Conversion Notice, the Borrower may elect that
Loans comprising a Borrowing accrue interest at a rate per annum:

          (i)  on that portion maintained from time to time as a Base Rate Loan,
     equal to the sum of the Alternate Base Rate from time to time in effect
     plus the Applicable Margin from time to time in effect; and

          (ii)  on that portion maintained as a LIBO Rate Loan, during each
     Interest Period applicable thereto, equal to the sum of the LIBO Rate for
     such InterestPeriod plus the Applicable Margin from time to time in effect.

          "LIBO Rate" means, for each day during each Interest Period for each
           ---------
LIBO Rate 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 Telerate Service Page 3750 as of
11:00 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 Telerate
Service Page 3750, the "LIBO 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

                                      -16-
<PAGE>
 
or, in the absence of such availability, by reference to the rate at which the
Administrative Agent is offered Dollar deposits at or about 11:00 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.  Notwithstanding
any other provision hereof, at such time as there shall exist for any Lender a
LIBOR Reserve Percentage which is greater than zero, the LIBO Rate used in the
determination of LIBO Rate Loans made by such Lender shall be the LIBO Rate
(Reserve Adjusted).

          (b) All LIBO Rate Loans shall bear interest from and including the
first day of the applicable Interest Period to (but not including) the last day
of such Interest Period at the interest rate determined as applicable to such
LIBO Rate Loan.

          SECTION 3.2.2 Post-Maturity Rates; Default Rates.  (a)  After the date
                        ----------------------------------
any principal amount of any Loan is due and payable (whether on the related
Commitment Termination Date, upon acceleration or otherwise), or after any
monetary Obligation of the Borrower shall become due and payable, the Borrower
shall pay, but only to the extent permitted by law, interest (after as well as
before judgment) on such overdue amount at a rate per annum equal to the
Alternate Base Rate plus the Applicable Margin plus 2% until such amount is paid
in full.

          (b) Upon the occurrence and during the continuance of any Event of
Default (other than an Event of Default under Section 8.1.1, for which provision
                                              -------------
is made in Section 3.2.2(a) above), the Borrower shall pay, but only to the
           ----------------
extent permitted by law, in addition to the interest then payable on the Loans,
interest (after as well as before judgment) on the Loans at 2% per annum until
such Event of Default is cured.

          SECTION 3.2.3 Payment Dates.  Interest accrued on each Loan shall be
                        -------------
payable, without duplication:

          (a)  on the related Commitment Termination Date;

          (b)  on the date of any payment or prepayment, in whole or in part, of
       principal outstanding on such Loan;

          (c)  with respect to Base Rate Loans, on each Quarterly Payment Date
     occurring after the date of the initial Borrowing hereunder;

          (d)  with respect to LIBO Rate Loans, the last day of each applicable
          Interest Period; and

          (e)  on that portion of any Loans which is accelerated pursuant to
       Section 8.2 or Section 8.3, immediately upon such acceleration.
       -----------    -----------

                                      -17-
<PAGE>
 
Interest accrued on Loans or other monetary Obligations arising under or any
Loan Document after the date such amount is due and payable (whether on the
related Commitment Termination Date, upon acceleration or otherwise) shall be
payable upon demand.

          SECTION 3.2.4  Interest Rate Determination.  The Administrative Agent
                         ---------------------------
shall determine the interest rate applicable to Loans and shall give prompt
notice to the Borrower and the Lenders of such determination, and its
determination thereof shall be conclusive in the absence of manifest
error.

          SECTION 3.3  Fees.  The Borrower agrees to pay the fees set forth in
                       ----
this Section 3.3.

          SECTION 3.3.1  Facility Fee.  The Borrower agrees to pay to the
                         ------------
Administrative Agent, for the ratable account of each Lender, a facility fee
(the "Facility Fee") in respect of the Total Commitment Amount (irrespective of
      ------------
usage) for each day from and after the Effective Date at the rate per annum in
effect for such day based on the Borrower's Debt Rating for such day determined
as provided in the Pricing Grid.  Such fee shall be payable in arrears on each
Quarterly Payment Date, commencing with the first such date following the
Effective Date, and on the related Commitment Termination Date.

          SECTION 3.3.2  Utilization Fee.  The Borrower agrees to pay to the
                         ---------------
Administrative Agent, for the ratable account of each Lender, a utilization fee
(the "Utilization Fee") in respect of the percentage of the Total Commitment
      ---------------
Amount outstanding on any date of determination at the rate per annum in effect
for such day based on the Borrower's Debt Rating for such day determined as
provided in the Pricing Grid.  Such fee shall be payable in arrears on each
Quarterly Payment Date, commencing with the first such date following the
Effective Date, or at the end of each Interest Period, in each case, in
accordance with Section 3.2.3, and on the related Commitment Termination Date.
                -------------

          SECTION 3.3.3  Administrative Agent's Fee and Miscellaneous Fees.  The
                         -------------------------------------------------
Borrower agrees to pay to the Administrative Agent, for (i) its own account,
(ii) the account of the Lenders and (iii) the account of the Lead Arrangers, the
respective fees as agreed to in the letter dated February 19, 1999, between the
Administrative Agent, the Lead Arrangers, the Initial Lenders and the Borrower.

                                   ARTICLE IV
                     CERTAIN LIBO RATE AND OTHER PROVISIONS

          SECTION 4.1  LIBO Rate Lending Unlawful.  If any Lender shall
                       --------------------------
reasonably determine (which determination shall, upon notice thereof to the
Borrower and the Administrative Agent, be conclusive and binding on the Borrower
absent manifest error) that the introduction of or any change in or in the
interpretation of any law, rule or regulation makes it unlawful, or any central
bank or other governmental authority or comparable agency asserts that it is
unlawful, for such Lender to make, continue or maintain any Loan as, or to
convert any Loan into, a LIBO

                                      -18-
<PAGE>
 
Rate Loan, the obligations of such Lender to make, continue, maintain or convert
any such Loans shall, upon such determination, forthwith be suspended until such
Lender shall notify the Administrative Agent that the circumstances causing such
suspension no longer exist, and all LIBO Rate Loans of such Lender shall
automatically convert into Base Rate Loans at the end of the then current
Interest Periods with respect thereto or sooner, if required by such law or
assertion.

          SECTION 4.2  Inability to Determine Rates.  If the Administrative
                       ----------------------------
Agent shall have determined that by reason of circumstances affecting the
Administrative Agent's relevant market, adequate means do not exist for
ascertaining the interest rate applicable hereunder to LIBO Rate Loans, then,
upon notice from the Administrative Agent to the Borrower and the Lenders, the
obligations of all Lenders under Section 2.3 and Section 2.4 to make or continue
                                 -----------     -----------
any Loans as, or to convert any Loans into, LIBO Rate Loans shall forthwith be
suspended until the Administrative Agent shall notify the Borrower and the
Lenders that the circumstances causing such suspension no longer exist.

          SECTION 4.3  Increased LIBO Rate Loan Costs.  If after the date
                       ------------------------------
hereof, the adoption of any applicable law, rule or regulation, or any change
therein, or any change in the interpretation or administration thereof by any
governmental authority, central bank or comparable agency charged with the
interpretation or administration thereof, or compliance by any Lender (or its
LIBOR Office) with any request or directive (whether or not having the force of
law) of any such authority, central bank or comparable agency shall increase the
cost to such Lender of, or result in any reduction in the amount of any sum
receivable by such Lender in respect of, making, continuing or maintaining (or
of its obligation to make, continue or maintain) any Loans as, or of converting
(or of its obligation to convert) any Loans into, LIBO Rate Loans, then the
Borrower agrees to pay to the Administrative Agent for the account of each
Lender the amount of any such increase or reduction.  Such Lender shall promptly
notify the Administrative Agent and the Borrower in writing of the occurrence of
any such event, such notice to state, in reasonable detail, the reasons therefor
and the additional amount required fully to compensate such Lender for such
increased cost or reduced amount. Such additional amounts shall be payable by
the Borrower directly to such Lender within ten Business Days of its receipt of
such notice, and such notice shall be binding on the Borrower absent clear and
convincing evidence to the contrary.

          SECTION 4.4  Obligation to Mitigate.  Each Lender agrees that as
                       ----------------------
promptly as practicable after it becomes aware of the occurrence of an event
that would entitle it to give notice pursuant to Section 4.l, 4.3 or 4.6, and
                                                 -----------  ---    --- 
in any event if so requested by the Borrower, each Lender shall use reasonable
efforts to make, fund or maintain its affected Loans through another lending
office if as a result thereof the increased costs would be avoided or materially
reduced or the illegality would thereby cease to exist and if, in the reasonable
opinion of such Lender, the making, funding or maintaining of such Loans through
such other lending office would not in any material respect be disadvantageous
to such Lender, contrary to such Lender's normal banking practices or violate
any applicable law or regulation.  No change by a Lender in its Domestic Office
or LIBOR Office made for such Lender's convenience shall result in any increased
cost to

                                      -19-
<PAGE>
 
the Borrower. The Borrower shall not be obligated to compensate any Lender for
the amount of any additional amount pursuant to Section 4.1, 4.3 or  4.6
                                                -----------  ---     ---
accruing prior to the date which is 90 days before the date on which such Lender
first notifies the Borrower that it intends to claim such compensation; it being
understood that the calculation of the actual amounts may not be possible within
such period and that such Lender may provide such calculation as soon as
reasonably practicable thereafter without affecting or limiting the Borrower's
payment obligation thereunder.  If any Lender demands compensation pursuant to
Section 4.1, 4.3 or  4.6  with respect to any LIBO Rate Loan, the Borrower may,
- -----------  ---     ---
at any time upon at least one Business Days prior notice to such Lender through
the Administrative Agent, elect to convert such Loan into a Base Rate Loan.
Thereafter, unless and until such Lender notifies the Borrower that the
circumstances giving rise to such notice no longer apply, all such LIBO Rate
Loans by such Lender shall bear interest as Base Rate Loans, notwithstanding any
prior election by the Borrower to the contrary.  If such Lender notifies the
Borrower that the circumstances giving rise to such notice no longer apply, the
Borrower may elect that the principal amount of each such Loan again bear
interest as LIBO Rate Loans in accordance with this Agreement, on the first day
of the next succeeding Interest Period applicable to the related LIBO Rate Loans
of other Lenders.  Additionally, the Borrower may, at its option, upon at least
five Business Days' prior notice to such Lender, elect to prepay in full,
without premium or penalty, such Lender's affected LIBO Rate Loans.  If the
Borrower elects to prepay any Loans pursuant to this Section 4.4, the Borrower
                                                     -----------
shall pay within ten Business Days after written demand any additional increased
costs of such Lender accruing for the period prior to such date of prepayment.
If such conversion or prepayment is made on a day other than the last day of the
current Interest Period for such affected LIBO Rate Loans, such Lender shall be
entitled to make a request for, and the Borrower shall pay, compensation under
Section 4.5.
- -----------

          SECTION 4.5  Funding Losses.  In the event any Lender shall incur any
                       --------------
loss or expense (including any loss or expense incurred by reason of the
liquidation or reemployment of deposits or other funds acquired by such Lender
to make, continue or maintain any portion of the principal amount of any Loan
as, or to convert any portion of the principal amount of any Loan into, a LIBO
Rate Loan) as a result of:

          (a) any conversion or repayment or prepayment of the principal amount
     of any LIBO Rate Loans on a date other than the scheduled last day of the
     Interest Period applicable thereto, whether pursuant to Section 3.1 or
                                                             -----------
     otherwise;

          (b) Borrower's failure to borrow any LIBO Rate Loans in accordance
     with the Borrowing Request therefor; or

          (c) any Loans not being continued as, or converted into, LIBO Rate
     Loans in accordance with the Continuation/Conversion Notice therefor;

then, upon the written notice of such Lender to the Borrower (with a copy to the
Administrative Agent), the Borrower shall, within ten Business Days of its
receipt thereof, pay directly to such Lender such amount as will (in the
reasonable determination of such Lender) reimburse such

                                      -20-
<PAGE>
 
Lender for such loss or expense. Such written notice (which shall include
calculations in reasonable detail) shall be binding on the Borrower absent
manifest error.

          SECTION 4.6  Increased Capital Costs.  If after the date hereof any
                       -----------------------
change in, or the introduction, adoption, effectiveness, interpretation,
reinterpretation or phase-in of, any applicable law or regulation, directive,
guideline, decision or request (whether or not having the force of law) of any
court, central bank, regulator or other governmental authority affects the
amount of capital required to be maintained by any Lender, and such Lender
reasonably determines that the rate of return on its capital as a consequence of
its Commitment or the Loans made by such Lender is reduced in a material amount
to a level below that which such Lender could have achieved but for the
occurrence of any such circumstance, then, in any such case upon notice from
time to time by such Lender to the Borrower, the Borrower shall pay within ten
Business Days after such demand directly to such Lender additional amounts
sufficient to compensate such Lender for such reduction in rate of return.  A
statement of such Lender as to any such additional amount or amounts (including
calculations thereof in reasonable detail) shall be binding on the Borrower
absent manifest error.

          SECTION 4.7  Taxes.  (a)  All payments by the Borrower of principal
                       -----
of, and interest on, the Loans and all other amounts payable hereunder shall be
made free and clear of and without deduction for any present or future income,
excise, stamp or franchise taxes and other taxes, fees, duties, withholdings or
other charges of any nature whatsoever imposed by any taxing authority, but
excluding franchise taxes or taxes imposed on or measured by any Lender's net
income, in each case, imposed as a result of a connection between the Lender and
the jurisdiction imposing the tax (other than a connection arising solely from
the Lender having executed, delivered or performed its obligations or received a
payment under, or enforced, this Agreement), and the Lenders will use reasonable
efforts to minimize, to the extent possible, any such applicable taxes;
provided, however, that such taxes does not include franchise taxes  receipts,
- --------
net worth or shareholders' capital (such non-excluded items being called
"Taxes"). In the event that any withholding or deduction from any payment to be
 -----
made by the Borrower hereunder is required in respect of any Taxes pursuant to
any applicable law, rule or regulation, then the Borrower will:

          (i) pay directly to the relevant authority the full amount required to
       be so withheld or deducted;


          (ii) within 30 days after such payment forward to the Administrative
     Agent an official receipt or other documentation satisfactory to the
     Administrative Agent evidencing such payment to such authority; and


          (iii)  pay to the Administrative Agent for the account of the Lenders
     such additional amount or amounts as is necessary to ensure that the net
     amount actually received by each Lender will equal the full amount such
     Lender would have received had no such withholding or deduction been
     required.

                                      -21-
<PAGE>
 
Moreover, if any Taxes are directly asserted against the Administrative Agent or
any Lender with respect to any payment received by the Administrative Agent or
such Lender hereunder, the Administrative Agent or such Lender may pay such
Taxes and, upon receipt of notice from the Administrative Agent or such Lender
within 30 days after such payment, the Borrower will promptly pay such
additional amounts (including any penalties, interest or expenses ) as is
necessary in order that the net amount received by such person after the payment
of such Taxes (including any Taxes on such additional amount) shall equal the
amount such person would have received had no such Taxes been asserted.

          (b)  If the Borrower fails to pay any Taxes when due to the
appropriate taxing authority or fails to remit to the Administrative Agent, for
the account of the respective Lenders, the required receipts or other required
documentary evidence, the Borrower shall indemnify the Lenders for any
incremental Taxes, interest or penalties that may become payable by any Lender
as a result of any such failure.  For purposes of this Section 4.7, a
                                                       -----------
distribution hereunder by the Administrative Agent or any Lender to or for the
account of any Lender shall be deemed a payment by the Borrower.

          (c)  Each Lender that is not a United States person as defined in
Section 7701(a)(3) of the Code (a "Non-U.S. Lender") shall deliver to the
                                   ---------------
Borrower and the Administrative Agent two copies of either U.S. Internal Revenue
Service Form 1001 or Form 4224, 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 the 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.  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).  The
Borrower shall not be required to increase any such amounts payable to any Non-
U.S. Lender with respect to any Non-Excluded Taxes (i) that are attributable to
such Non-U.S. Lender's failure to comply with the requirements of this Section
                                                                       -------
4.7(C) or (ii) that are United States withholding taxes imposed on amounts
- ------
payable to such Lender at the time the 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 Section 4.7(a). Notwithstanding any other
                                       --------------
provision of this Section 4.7(c), a Non-U.S. Lender shall not be required to
                  --------------
deliver any form pursuant to this Section 4.7(C) that such Non-U.S.  Lender is
                                  --------------
not legally able to deliver.

          SECTION 4.8  Payments, Computations.  Unless otherwise expressly
                       ----------------------
provided, all payments by the Borrower pursuant to any Loan Document shall be
made by the Borrower to the Administrative Agent for the pro rata account of the
                                                         --------
Lenders entitled to receive such payment.  All such payments required to be made
to the Administrative Agent shall be made, without setoff, deduction or
counterclaim, not later than 12:00 Noon, New York City time, on the date due, in

                                      -22-
<PAGE>
 
Same Day Funds, to such account as the Administrative Agent shall specify from
time to time by notice to the Borrower; provided that such payment shall be
                                        --------
deemed made timely if made by wire transfer and by such time as an Authorized
Representative has advised the Administrative Agent of the applicable Federal
Reserve System wire transfer confirmation number.  Funds received after that
time shall be deemed to have been received by the Administrative Agent on the
next succeeding Business Day.  The Administrative Agent shall promptly remit in
Same Day Funds to each Lender its share, if any, of such payments received by
the Administrative Agent for the account of such Lender.  All interest and fees
shall be computed on the basis of the actual number of days (including the first
day but excluding the last day) occurring during the period for which such
interest or fee is payable over a year comprised of 360 days (or, in the case of
interest on a Base Rate Loan, 365 days or, if appropriate, 366 days).  Whenever
any payment to be made shall otherwise be due on a day which is not a Business
Day, such payment shall (except as otherwise required by clause (c) of the
                                                         ----------
definition of the term "Interest Period" with respect to LIBO Rate Loans) be
                        ---------------
made on the next succeeding Business Day and such extension of time shall be
included in computing interest and fees, if any, in connection with such
payment.

          SECTION 4.9  Sharing of Payments.  If any Lender shall obtain any
                       -------------------
payment or other recovery (whether voluntary, involuntary, by application of
setoff or otherwise) on account of any Committed Loan (other than pursuant to
the terms of Sections 4.3, 4.4, 4.5, 4.6, and  4.7) in excess of its pro rata
             ---------------------------       ---                   --- ----
share of payments then or therewith obtained by all Lenders holding Loans of
such type, such Lender shall purchase from the other Lenders such participations
in Committed Loans made by them as shall be necessary to cause such purchasing
Lender to share the excess payment or other recovery ratably with each of them;
provided, however, that if all or any portion of the excess payment or other
- --------  -------
recovery is thereafter recovered from such purchasing Lender, the purchase shall
be rescinded and each Lender which has sold a participation to the purchasing
Lender shall repay to the purchasing Lender the purchase price to the ratable
extent of such recovery together with an amount equal to such selling Lender's
ratable share (according to the proportion of (a) the amount of such selling
Lender's required repayment to the purchasing Lender to (b) the total amount so
recovered from the purchasing Lender) of any interest or other amount paid or
payable by the purchasing Lender in respect of the total amount so recovered.
The Borrower agrees that any Lender so purchasing a participation from another
Lender pursuant to this Section 4.9 may, to the fullest extent permitted by law,
                        -----------
exercise all its rights of payment (including pursuant to Section 4.10) with
                                                          ------------
respect to such participation as fully as if such Lender were the direct
creditor of the Borrower in the amount of such participation.

          If under any applicable bankruptcy, insolvency or other similar law,
any Lender receives a secured claim in lieu of a setoff to which this Section
                                                                      -------
4.9 applies, such Lender shall, to the extent practicable, exercise its rights
- ---
in respect of such secured claim in a manner consistent with the rights of the
Lenders entitled under this Section 4.9 to share in the benefits of any recovery
                            -----------
on such secured claim.

          SECTION 4.10  Setoff.  Each Lender shall, upon the occurrence of any
                        ------
Event of Default described in clauses (a) or (b) of Section 8.1.9. and, upon the
                              -----------    ---    -------------
occurrence of any Default described in clauses (c) through (d) of Section 8.1.9
                                       -----------         ---    -------------
with respect to the Borrower or, with the

                                     -23-
<PAGE>
 
consent of the Required Lenders, upon the occurrence and continuance beyond the
expiration of the applicable grace period, if any, of any other Event of
Default, have the right to appropriate and apply to the payment of the
Obligations owing to it (whether or not then due), and (as security for such
Obligations) the Borrower hereby grants to each Lender a continuing security
interest in, any and all balances, credits, deposits, accounts or moneys of the
Borrower then or thereafter maintained with such Lender or any bank controlling
such Lender; provided, however, that any such appropriation and application
             --------  -------
shall be subject to the provisions of Section 4.9.  
                                      -----------

          Each Lender agrees promptly to notify the Borrower and the
Administrative Agent after any such setoff and application made by such Lender;
provided, however, that the failure to give such notice shall not affect the
- --------  -------
validity of such setoff and application.

          The rights of each Lender under this Section 4.10 are in addition to
                                               ------------
other rights and remedies (including other rights of setoff under applicable law
or otherwise) which such Lender may have.

          SECTION 4.11  Replacement of Lender. The Borrower shall be permitted
                        ---------------------
to replace (with one or more replacement Lenders) any Lender which requests
reimbursement for amounts owing pursuant to Section 4.1, 4.3, 4.6 or 4.7;
                                            ---------------------    ---
provided that (i) such replacement does not conflict with any law, treaty, rule
- --------
or regulation or determination of an arbitrator or a court or other governmental
authority, in each case applicable to the Borrower or such Lender or to which
the Borrower or such Lender or any of their respective property is subject, (ii)
no Default or Event of Default shall have occurred and be continuing at the time
of such replacement, (iii) the Borrower shall repay (or the replacement bank or
institution shall purchase, at par) all Loans and other amounts owing to such
replaced Lender prior to the date of replacement, (iv) the Borrower shall be
liable to such replaced Lender under Section 4.5 if any LIBO Rate Loan owing to
                                     -----------
such replaced Lender shall be prepaid (or purchased) other than on the last day
of the Interest Period relating thereto, (v) the replacement bank or
institution, if not already a Lender, shall be reasonably satisfactory to the
Administrative Agent, (vi) the replaced Lender shall be obligated to make such
replacement in accordance with the provisions of Section 10.11.1 (provided that
                                                 ---------------
the Borrower or replacement Lender shall be obligated to pay the registration
and processing fee), (vii) until such time as such replacement shall be
consummated, the Borrower shall pay all additional amounts (if any) required
pursuant to Section 4.1, 4.3, 4.6 or 4.7, as the case may be, (viii) any such
            ---------------------    ---
replacement shall not be deemed to be a waiver of any rights which the Borrower,
the Administrative Agent or any other Lender shall have against the replaced
Lender, and (ix) if such replacement bank or institution is not already a
Lender, the Borrower shall pay to the Administrative Agent an administrative fee
of $3,500.

                                   ARTICLE V
                              CONDITIONS TO LOANS

          SECTION 5.1 Conditions to Effectiveness.  This Agreement shall become
effective upon the satisfaction of each of the conditions precedent set forth in
this Section 5.1.
     -----------

                                      -24-
<PAGE>
 
          SECTION 5.1.1 Delivery of Loan Documents.  The Administrative Agent
                        --------------------------
shall have received from the Borrower this Agreement, executed and delivered by
an Authorized Representative of the Borrower, with a counterpart for each Lender
and, for the account of each Lender who so requests, its Note duly executed and
delivered by the Borrower.

          SECTION 5.1.2  Officer's Certificate.  The Administrative Agent shall
                         ---------------------
have received, with a copy for each Lender, a certificate of an Authorized
Representative of the Borrower, substantially in the form of Exhibit E.
                                                             ---------

          SECTION 5.1.3  Resolutions.  The Administrative Agent shall have
received from the Borrower a certificate, substantially in the form of Exhibit F
                                                                       ---------
hereto, dated the Effective Date, of its Secretary or Assistant Secretary as to:

          (a) resolutions of its Board of Directors then in full force and
     effect authorizing the execution, delivery and performance of each Loan
     Document to be executed by it;

          (b) the incumbency and signatures of those of its officers and
     representatives authorized to act with respect to each Loan Document
     executed by it; and

          (c) the Borrower's Organic Documents.

          The Administrative Agent and each Lender may conclusively rely upon
such certificate until it shall have received a further certificate of the
Secretary, Assistant Secretary or other Authorized Representative of the
Borrower canceling or amending such prior certificate.

          SECTION 5.1.4  Opinions of Counsel.  The Administrative Agent shall
                         -------------------
have received opinions, dated the Effective Date and addressed to the
Administrative Agent and the Lenders, from the Assistant General Counsel of the
Borrower, substantially in the form of Exhibit G hereto and given upon the
                                       ---------
express instruction of the Borrower.

          SECTION 5.1.5  Closing Fees, Expenses. The Administrative Agent shall
                         ----------------------
have received for its own account, or for the account of each Lender or Lead
Arranger, as the case may be, all fees due and payable pursuant to Section 3.3
                                                                   -----------
and  10.3 , and all costs and expenses for which invoices have been presented.
     ----

          SECTION 5.1.6  Financial Statements.  The Administrative Agent shall
                         --------------------
have received, with a copy for each Lender, the audited consolidated financial
statements of the Borrower for the 1997 Fiscal Year and the audited consolidated
financial statements of the Borrower for the 1998 Fiscal Year.

          SECTION 5.1.7  Debt Ratings.  The Borrower shall have received short
                         ------------
term debt ratings of A-2 and P-2 or better and maintain long term debt ratings
of at least BBB and Baa2 from S&P and Moody's, respectively.

                                      -25-
<PAGE>
 
          SECTION 5.2   All Loans.  The obligation of each Lender to make any
                        ---------
Loan (including the initial Loan) shall be subject to the satisfaction of each
of the conditions precedent set forth in this Section 5.2.
                                              -----------

          SECTION 5.2.1  Representations and Warranties; No Default.  Both
                         ------------------------------------------
before and after giving effect to any Borrowing (but, if any Default of the
nature referred to in Section 8.1.5 shall have occurred with respect to any
                      -------------
other Indebtedness, without giving effect to the application, directly or
indirectly, of the proceeds of such Borrowing), the following statements shall
be true and correct:

          (a) the representations and warranties set forth in Article VI shall
                                                              ----------
     be true and correct in all material respects with the same effect as if
     then made (unless stated to relate solely to an earlier date, in which case
     such representations and warranties shall be true and correct as of such
     earlier date); and

          (b) no Default or Event of Default has occurred and is continuing or
       would result from such Borrowing.

          SECTION 5.2.2  Borrowing Request.  The Administrative Agent shall have
                         -----------------
received a Borrowing Request for such Borrowing.  Each of the delivery of a
Borrowing Request and the acceptance by the Borrower of the proceeds of such
Borrowing shall constitute a representation and warranty by the Borrower that on
the date of such Borrowing (both immediately before and after giving effect to
such Borrowing and the application of the proceeds thereof) the statements made
in Section  5.2.1  are true and correct.
            -----

          SECTION 5.2.3  Satisfactory Legal Form.  All documents executed or
                         -----------------------
submitted pursuant hereto by or on behalf of the Borrower shall be satisfactory
in form and substance to the Administrative Agent and its counsel.

                                   ARTICLE VI
                         REPRESENTATIONS AND WARRANTIES

          In order to induce the Administrative Agent and each Lender to enter
into this Agreement and to make Loans hereunder, the Borrower represents and
warrants unto the Administrative Agent and each Lender as set forth in this
Article VI.
- ----------

          SECTION 6.1  Organization; Power; Compliance with Law and Contractual
                       --------------------------------------------------------
Obligations.  The Borrower (a) is a corporation validly organized and existing
- -----------
and in good standing under the laws of the state of its incorporation, (b) is
duly qualified to do business and is in good standing as a foreign corporation
in each jurisdiction where the nature of its business requires such
qualification, (c) has all requisite corporate power and authority and holds all
material requisite governmental licenses, permits and other approvals to enter
into and perform its Obligations under each Loan Document and to conduct its
business substantially as currently conducted by it and (d) is in compliance
with all laws, governmental regulations, court decrees,

                                      -26-
<PAGE>
 
orders and Contractual Obligations applicable to it, except, with respect to
clauses (b), (c) and (d) to the extent that the failure to comply therewith
- ------- --------     ---
could not reasonably be expected to have a Material Adverse Effect.

          SECTION 6.2  Due Authorization; Non-Contravention.  The execution,
                       ------------------------------------
delivery and performance by the Borrower of each Loan Document are within the
Borrower's corporate powers, have been duly authorized by all necessary
corporate action, and do not:

          (a) contravene the Borrower's Organic Documents;

          (b) contravene any law, governmental regulation, court decree or order
       or material Contractual Obligation binding on or affecting the Borrower;
       or

          (c) result in, or require the creation or imposition of, any Lien on
       any of the Borrower's properties.

          SECTION 6.3  Governmental Approval; Regulation.  (a)  No
                       ---------------------------------
authorization, consent, approval, license, exemption of or filing or
registration with any court or governmental authority or regulatory body
("Governmental Approval") is required for the Borrower to execute and perform
  ---------------------
its obligations under the Loan Documents, except for those which have been duly
obtained or effected.  No material Governmental Approval is required for the
Borrower to carry on its business, except for those which have been duly
obtained or effected.

          (b)  The Borrower is not subject to any regulation as an "investment
company" subject to the Investment Company Act of 1940, as amended, or as a
"holding company" or a "subsidiary company" or an "affiliate" of a "holding
company" subject to the Public Utility Holding Company Act of 1935, as amended
("PUHCA"), except that the Borrower is a "subsidiary company" of Edison
  -----
International which is a "holding company" that is exempt from all regulation
under PUHCA (except Section 9(a)(2) thereof) pursuant to Section 3(a) thereof.
The Borrower is not otherwise subject to any regulation as a "public utility"
under any other applicable law, rule or regulation, which would have a Material
Adverse Effect.

          SECTION 6.4  Validity.  Each Loan Document constitutes the legal,
                       --------
valid and binding obligations of the Borrower enforceable in accordance with
their respective terms (except as may be limited by bankruptcy, insolvency or
other similar laws affecting the enforcement of creditors' rights generally and
general principles of equity).

          SECTION 6.5  Financial Information.  The consolidated balance sheets
                       ---------------------
of the Borrower as at December 31, 1997, and December 31, 1998, and the related
consolidated statements of income and cash flows of the Borrower, copies of
which have been furnished to the Administrative Agent, have been prepared in
accordance with GAAP consistently applied, and present fairly the consolidated
financial condition of the Borrower and its Subsidiaries as at the dates thereof
and the results of their operations for the periods then ended.
                                      
                                     -27-
<PAGE>
 
          SECTION 6.6  No Material Adverse Change.  There has not occurred any
                       --------------------------
event or condition having a Material Adverse Effect since December 31, 1998.

          SECTION 6.7  Litigation.  There is no pending or, to the knowledge of
                       ----------
the Borrower, threatened litigation, action, proceeding, or labor controversy
affecting the Borrower, or any of its properties, businesses, assets or
revenues, which, if adversely determined (taking into account any insurance
proceeds payable under a policy where the insurer has accepted coverage without
any reservations), would have a Material Adverse Effect or which purports to
adversely affect the legality, validity or enforceability of this or any Loan
Document.

          SECTION 6.8  Ownership of Properties.  The Borrower owns good and
                       -----------------------
marketable title to, or a valid leasehold interest in or other enforceable
interest in all properties and assets, real and personal, tangible and
intangible, of any nature whatsoever (including patents, trademarks, trade
names, service marks and copyrights) purported to be owned, leased or held by
it, free and clear of all Liens, charges or claims (including infringement
claims with respect to patents, trademarks, copyrights and the like) except as
permitted pursuant to Section 7.2.3.
                      -------------

          SECTION 6.9  Taxes.  The Borrower has filed all tax returns and
                       -----
reports required by law to have been filed by it and has paid all taxes and
governmental charges thereby shown to be owing, except any such taxes or charges
which are being diligently contested in good faith by appropriate proceedings
and for which adequate reserves in accordance with GAAP shall have been set
aside on its books.

          SECTION 6.10  Pension and Welfare Plans.  During the consecutive
                        -------------------------
twelve-month period prior to the date of the execution and delivery of this
Agreement and prior to the date of any Borrowing hereunder, no steps have been
taken to terminate any Pension Plan, and no contribution failure has occurred
with respect to any Pension Plan sufficient to give rise to a Lien under Section
302(f) of ERISA.  No condition exists or event or transaction has occurred with
respect to any Pension Plan which could reasonably be expected to result in the
incurrence by the Borrower or any member of the Controlled Group of any material
liability (other than liabilities incurred in the ordinary course of maintaining
the Pension Plan), fine or penalty.  Neither the Borrower nor any member of the
Controlled Group has any contingent liability with respect to any post-
retirement benefit under a Welfare Plan which could reasonably be expected to
have a Material Adverse Effect, other than liability for continuation coverage
described in Part 6 of Title I of ERISA.

          SECTION 6.11  Environmental Warranties. (a)  All facilities and
                        ------------------------
property owned or leased by the Borrower or any of its Subsidiaries or
Partnerships have been, and continue to be, owned or leased by the Borrower and
its Subsidiaries in compliance with all Environmental Laws, except where the
failure so to comply would not have, or be reasonably expected to have, a
Material Adverse Effect.

          (b) There are no pending or, to the knowledge of the Borrower,
threatened:

                                      -28-
<PAGE>
 
               (i)  material claims, complaints, notices or requests for
          information received by the Borrower from governmental authorities
          with respect to any alleged violation by the Borrower of any
          Environmental Law; or

               (ii)  material complaints, notices or inquiries to the Borrower
          from governmental authorities regarding potential liability under any
          Environmental Law.

          (c) There have been no Releases (as defined under any Environmental
Law) of Hazardous Materials at, on or under any property now or previously owned
or leased by the Borrower that, singly or in the aggregate, have, or may
reasonably be expected to have, a Material Adverse Effect.

          (d) The Borrower has obtained and is in compliance with all permits,
certificates, approvals, licenses and other authorizations relating to
environmental matters and necessary for the Borrower's business, except where
the failure to obtain, maintain or comply with such permits, certificates,
approvals, licenses or other authorizations would not have, or be reasonably
expected to have, a Material Adverse Effect.

          (e) No property now or previously owned or leased by the Borrower is
listed or proposed for listing (with respect to owned property only) on the
National Priorities List pursuant to any Environmental Law, on the CERCLIS or on
any similar state list of sites requiring investigation or clean-up.

          (f) No conditions exist at, on or under any property now or previously
owned or leased by the Borrower which, with the passage of time, or the giving
of notice or both, would give rise to liability under any Environmental Law
which liability would have, or may reasonably be expected to have, a Material
Adverse Effect.

          SECTION 6.12  Regulations T, U and X.  The Borrower is not engaged in
                        ----------------------
the business of extending credit for the purpose of purchasing or carrying
margin stock, and no proceeds of any Loans will be used for a purpose which
violates, or would be inconsistent with, F.R.S. Board Regulation T, U or X.
Terms for which meanings are provided in F.R.S. Board Regulation T, U or X or
any regulations substituted therefor, as from time to time in effect, are used
in this Section with such meanings.

          SECTION 6.13  Accuracy of Information.  All factual information
                        -----------------------
heretofore or contemporaneously furnished by the Borrower in writing to the
Administrative Agent or any Lender for purposes of or in connection with this
Agreement or any transaction contemplated hereby is, and all other such written
factual information hereafter furnished by the Borrower in writing to the
Administrative Agent or any Lender will be, true and materially accurate in
every material respect on the date as of which such information is dated or
certified and as of the date of execution and delivery of this Agreement by the
Administrative Agent and such Lender, and such

                                      -29-
<PAGE>
 
information is not, or shall not be, as the case may be, incomplete by omitting
to state any material fact necessary to make such information not materially
misleading.

          SECTION 6.14  The Obligations.  The Obligations are senior, unsecured
                        ---------------
Indebtedness of the Borrower ranking at least pari passu with all other senior,
                                              ---- -----
unsecured Indebtedness of the Borrower.

          SECTION 6.15  Year 2000 Matters.  The Borrower has reviewed its
                        -----------------
operations and those of its Subsidiaries with a view to assessing whether its
businesses or the businesses of any of its Subsidiaries will, in the receipt,
transmission, processing, manipulation, storage, retrieval, retransmission or
other utilization of data, be vulnerable to a Year 2000 Problem or will be
vulnerable to the effects of a Year 2000 Problem suffered by any of the
Borrower's or any of its Subsidiaries' major commercial counter-parties.  Based
on such review the Borrower has no reason to believe that a Material Adverse
Effect will occur with respect to its businesses or operations or the businesses
or operations of any of its Subsidiaries resulting from a Year 2000 Problem.

                                  ARTICLE VII
                                   COVENANTS

          SECTION 7.1  Affirmative Covenants.  The Borrower agrees with the
                       ---------------------
Administrative Agent and each Lender that, until the Commitments have terminated
and all Obligations have been paid and performed in full, the Borrower will
perform the obligations set forth in this Section 7.1.
                                          -----------

          SECTION 7.1.1  Financial Information, Reports, Notices.  The Borrower
                         ---------------------------------------
will furnish, or will cause to be furnished, to the Administrative Agent copies
of the following financial statements, reports, notices and information:

          (a) as soon as available and in any event within 60 days after the end
     of each of the first three Fiscal Quarters of each Fiscal Year of the
     Borrower, consolidated balance sheets of the Borrower and its Subsidiaries
     as of the end of such Fiscal Quarter and consolidated statements of income
     and cash flows of the Borrower and its Subsidiaries for such Fiscal Quarter
     and for the period commencing at the end of the previous Fiscal Year and
     ending with the end of such Fiscal Quarter, certified by an Authorized
     Representative with responsibility for financial matters;

          (b) as soon as available and in any event within 120 days after the
     end of each Fiscal Year of the Borrower, a copy of the annual audit report
     for such Fiscal Year for the Borrower and its Subsidiaries, including
     therein consolidated balance sheets of the Borrower and its Subsidiaries as
     of the end of such Fiscal Year and consolidated statements of income and
     cash flows of the Borrower and its Subsidiaries for such Fiscal Year, and
     accompanied by the unqualified opinion of Arthur Andersen & Co. or other
     internationally recognized independent auditors selected by the Borrower
     which report

                                      -30-
<PAGE>
 
     shall state that such consolidated financial statements present fairly in
     all material respects the financial position for the periods indicated in
     conformity with GAAP applied on a basis consistent with prior periods;

          (c) concurrently with the delivery of the financial statements
     referred to in Section 7.1.1.(a), a certificate, executed by the
                    -----------------
     controller, treasurer or chief financial officer of the Borrower, showing
     (in reasonable detail and with appropriate calculations and computations in
     all respects satisfactory to the Administrative Agent) compliance with the
     financial covenant set forth in Section 7.2.4;
                                     -------------

          (d) as soon as possible and in any event within five Business Days
     after any Authorized Representative obtains knowledge of the occurrence of
     each Default, a statement of such Authorized Representative setting forth
     details of such Default or default and the action which the Borrower has
     taken and proposes to take with respect thereto;

          (e) as soon as possible and in any event within five Business Days
     after (x) the occurrence of any material adverse development with respect
     to any litigation, action, proceeding, or labor controversy of the type
     described in Section 6.7 or (y) the commencement of any labor controversy,
                  ----------- 
     litigation, action, proceeding of the type described in Section 6.7, notice
                                                             -----------
     thereof and, upon request of the Administrative Agent, copies of all non-
     privileged documentation relating thereto;

          (f) promptly after the sending or filing thereof, copies of all
     reports and registration statements which the Borrower files with the
     Securities and Exchange Commission or any national securities exchange;

          (g) immediately upon becoming aware of the institution of any steps by
     the Borrower or any other Person to terminate any Pension Plan (other than
     a standard termination under ERISA Section 4041(b)), or the failure to make
     a required contribution to any Pension Plan if such failure is sufficient
     to give rise to a Lien under Section 302(f) of ERISA, or the taking of any
     action with respect to a Pension Plan which could result in the requirement
     that the Borrower furnish a bond or other security to the PBGC or such
     Pension Plan, or the occurrence of any event with respect to any Pension
     Plan which could result in the incurrence by the Borrower or any member of
     the Controlled Group of any material liability (other than liabilities
     incurred in the ordinary course of maintaining the Pension Plan), fine or
     penalty, or any increase in the contingent liability of the Borrower with
     respect to any post-retirement Welfare Plan benefit which has a Material
     Adverse Effect, notice thereof and copies of all documentation relating
     thereto; and

          (h) as soon as known, any changes in Borrower's Debt Rating by Moody's
     or S&P or any other rating agency which maintains a Debt Rating on the
     Borrower which is used in the Pricing Grid.

                                      -31-
<PAGE>
 
          SECTION 7.1.2  Compliance with Laws.  The Borrower will comply in all
                         --------------------
material respects with all applicable law, rules, regulations and orders, such
compliance to include the payment, before the same become delinquent, of all
taxes, assessments and governmental charges imposed upon it or upon its property
(except to the extent such assignments and charges are being diligently
contested in good faith by appropriate proceedings and for which adequate
reserves in accordance with GAAP shall have been set aside on its books).

          SECTION 7.1.3  Maintenance of Properties.  The Borrower will, and will
                         -------------------------
use reasonable efforts to cause each of its Subsidiaries and Partnerships to,
maintain, preserve, protect and keep its property and equipment in good repair,
working order and condition (ordinary wear and tear excepted), and make
necessary and proper repairs, renewals and replacements so that its business
carried on in connection therewith may be properly conducted at all times unless
the Borrower determines in good faith that the continued maintenance of any of
its properties or equipment is no longer economically desirable and except where
the failure so to do would not have a Material Adverse Effect.

          SECTION 7.1.4  Insurance.  The Borrower will maintain or cause to be
                         ---------
maintained with responsible insurance companies insurance with respect to its
properties and business against such casualties and contingencies and of such
types and in such amounts as is customary in the case of similar businesses.

          SECTION 7.1.5  Books and Records.  The Borrower will, and will cause
                         -----------------
each of its active Subsidiaries to, keep books and records which accurately
reflect all of its business affairs and transactions and permit the
Administrative Agent and each Lender or any of their respective representatives
(at the Administrative Agent's or such Lender's expense), at reasonable times
and intervals upon reasonable prior notice, to visit all of its offices, to
discuss its financial matters with its officers and independent public
accountant.  The Borrower will at any reasonable time and from time to time upon
reasonable prior notice, permit the Administrative Agent and the Lenders or any
of their respective agents or representatives to examine and make copies of and
abstracts from the records and books of account of the Borrower; provided that
by virtue of this Section 7.1.5 the Borrower shall not be deemed to have waived
                  -------------
any right to confidential treatment of the informational obtained, subject to
the provisions of applicable law or court order.

          SECTION 7.1.6  Environmental Covenant.  The Borrower will, and will
                         ----------------------
use best efforts to cause each of its Subsidiaries and Partnerships to:

          (a) use and operate all of its facilities and properties in compliance
     with all Environmental Laws, keep all necessary permits, approvals,
     certificates, licenses and other authorizations relating to environmental
     matters in effect and remain in material compliance therewith, and handle
     all Hazardous Materials in material compliance with all applicable
     Environmental Laws, in each case where the failure to do so may reasonably
     be expected to have a Material Adverse Effect;

                                      -32-
<PAGE>
 
          (b) promptly cure and have dismissed with prejudice to the reasonable
     satisfaction of the Administrative Agent any actions and proceedings
     relating to compliance with Environmental Laws where such action or
     proceeding may reasonably be expected to have a Material Adverse Effect;
     provided that the Borrower or such Subsidiary or Partnership may postpone
     --------
     such cure and dismissal during any period in which it is diligently
     pursuing any available appeals in such action or proceeding so long as such
     postponement would not be reasonably likely to have a Material Adverse
     Effect; and

          (c) provide such non-privileged information as the Administrative
     Agent may reasonably request from time to time to evidence compliance with
     this Section 7.1.6.  
          -------------

          SECTION 7.1.7  Conduct of Business and Maintenance of Existence. The
                         ------------------------------------------------
Borrower will continue to engage in business of the same type as now conducted
by it and preserve, renew and keep in full force and effect its corporate
existence and take all reasonable action to maintain all material rights,
privileges and franchises necessary or desirable in the normal conduct of its
business, except, in each case, as otherwise permitted by Section 7.2.6.
                                                          -------------

          SECTION 7.1.8  Year 2000 Matters. The Borrower will, and will use best
                         -----------------
efforts to cause each of its Subsidiaries and Partnerships to assure that its
computer based systems are able to effectively process data including dates on
and after January 1, 2000.

          SECTION 7.1.9  Use of Proceeds.  The Borrower will apply the proceeds
                         ---------------
of the Loans to provide liquidity support for the Borrower's commercial paper
program or for general corporate purposes.

          SECTION 7.2  Negative Covenants.  The Borrower agrees with the
                       ------------------
Administrative Agent and each Lender that, until all Commitments have terminated
and all Obligations have been paid and performed in full, the Borrower will, and
will cause each of its Subsidiaries and Partnerships, as applicable, to perform
the obligations set forth in this Section 7.2.
                                  -----------

          SECTION 7.2.1  Restrictions on Secured Indebtedness.  The Borrower
                         ------------------------------------
will not create, incur, assume or suffer to exist any secured Indebtedness other
than:

          (a)  Capitalized Lease Liabilities and other secured Indebtedness of
     any kind whatsoever (including, without limitation, Indebtedness secured by
     a pledge of the stock of a Subsidiary not otherwise permitted under clause
                                                                         ------
     (b) of this Section 7.2.1) at any time outstanding not exceeding an
     ---         -------------
     aggregate principal amount equal to 10% of Net Tangible Assets; provided
     that any Indebtedness exceeding such amount may be secured pursuant to
     Section 7.2.3(f); and
     ----------------

          (b) Non-Recourse Debt with respect to which the Borrower has pledged
     the stock of a Subsidiary in order to secure initial project financing
     obtained or being obtained

                                      -33-
<PAGE>
 
     after the Effective Date hereof by such Subsidiary (or the Partnership in
     which such Subsidiary is a partner).

          SECTION 7.2.2  [Reserved].
                          --------

          SECTION 7.2.3  Liens.  The Borrower will not create, incur, assume or
                         -----
suffer to exist any Lien upon any of its property, revenues or assets, whether
now owned or hereafter acquired, except:

          (a) Liens granted to secure payment of Indebtedness of the type
     permitted and described in clause (b) of Section 7.2.l;
                                ----------    -------------

          (b) Liens for taxes, assessments or other governmental charges or
     levies not at the time delinquent or thereafter payable without penalty or
     which are being diligently contested in good faith by appropriate
     proceedings and for which adequate reserves in accordance with GAAP shall
     have been set aside on its books;

          (c) Liens of carriers, warehousemen, mechanics, materialmen and
     landlords incurred in the ordinary course of business for sums not overdue
     or which are being diligently contested in good faith by appropriate
     proceedings and for which adequate reserves in accordance with GAAP shall
     have been set aside on its books;

          (d) Liens incurred in the ordinary course of business in connection
     with workmen's compensation, unemployment insurance or other forms of
     governmental insurance or benefits, or to secure performance of tenders,
     statutory obligations, leases and contracts (other than for borrowed money)
     entered into in the ordinary course of business or to secure obligations on
     surety or appeal bonds;

          (e) judgment Liens in existence less than 30 days after the entry
     thereof or with respect to which execution has been stayed or the payment
     of which is covered in full (subject to a customary deductible) by
     insurance maintained with responsible insurance companies;

          (f) Liens upon any property at any time directly owned by the Borrower
     to secure any Indebtedness of the nature described in clause (a) of Section
                                                           ----------    -------
     7.2.1 in excess of the amount otherwise permitted thereby, provided that
     -----                                                      --------
     the Obligations shall be equally and ratably secured with any and all such
     Indebtedness and with any other Indebtedness similarly entitled to be
     equally and ratably secured; and

          (g) any Lien existing on the property of the Borrower on the Effective
     Date.

          In the event that the Borrower shall propose to create, incur, assume
or suffer to exist any Lien upon any property at any time directly owned by it
to secure any Indebtedness as contemplated by clause (f) above, the Borrower
                                              ----------
will give prior written notice thereof to the

                                      -34-
<PAGE>
 
Administrative Agent, who shall give notice to the Lenders, and the Borrower
will, prior to or simultaneously with the creation of such Lien, effectively
secure the Obligations equally and ratably with such Indebtedness.

          SECTION 7.2.4  Financial Condition.  The Borrower will not permit its
                         -------------------
Tangible Net Worth to be less than $400,000,000 plus 25% of the Borrower's and
                                                ----
its Subsidiaries' consolidated net income earned (without subtracting net
losses) in each Fiscal Quarter commencing with the quarter ending after
September 30, 1992.

          SECTION 7.2.5  Investments.  The Borrower will not, and will not
                         -----------
permit any of its Subsidiaries to, make, incur, assume or suffer to exist any
Investment in any other Person, except:

          (a) Investments existing on the Effective Date;

          (b) Cash Equivalent Investments, provided, however, that any
                                           --------  -------
     Investment which when made complies with the requirements of the definition
     of the term "Cash Equivalent Investment" may continue to be held
                  --------------------------
     notwithstanding that such Investment if made thereafter would not comply
     with such requirements.

          (c) without duplication, Investments permitted as Indebtedness
       pursuant to Section 7.2.1;
                   -------------

          (d) otherwise in the ordinary course of business; and

          (e) Investments permitted pursuant to Section 7.2.6(b).
                                                ----------------

          SECTION 7.2.6  Consolidation, Merger.  The Borrower will not, and will
                         ---------------------
not permit any of its Subsidiaries to, liquidate or dissolve, consolidate with,
or merge into or with, any other corporation, or purchase or otherwise acquire
all or substantially all of the assets of any Person (or of any division
thereof) except:

          (a) any such Subsidiary may liquidate or dissolve voluntarily into,
     and may merge with and into, the Borrower or any other Subsidiary, and the
     assets or stock of any Subsidiary may be purchased or otherwise acquired by
     the Borrower or any other Subsidiary;

          (b) so long as no Default (by reason of the violation of Section
                                                                   -------
     7.2.4) has occurred and is continuing or would occur after giving effect
     -----
     thereto, the Borrower or any of its Subsidiaries may purchase all or
     substantially all of the assets of any Person, or (in the case of any such
     Subsidiary) acquire such person by merger; and

          (c) provided that no Default has occurred and is continuing or would
     occur after giving effect thereto (including, without limitation, a Change
     in Control), the

                                      -35-
<PAGE>
 
     Borrower may consolidate with or merge into any other Person, or convey,
     transfer or lease its properties and assets substantially as an entirety to
     any person, or permit any Person to merge into or consolidate with the
     Borrower if the Borrower is the surviving corporation or the surviving
     corporation or purchaser or lessee is a corporation incorporated under the
     laws of the United States of America or Canada and assumes the Obligations.

          SECTION 7.2.7  Asset Dispositions.  The Borrower will not, and will
                         ------------------
not permit any of its Subsidiaries to, sell, transfer, lease, contribute or
otherwise convey, or grant options, warrants or other rights with respect to,
all or any substantial part of its assets (including accounts receivable and
capital stock of Subsidiaries) to any Person, unless:

          (a) such sale, transfer, lease, contribution or conveyance is the
       ordinary course of its business; or

          (b) the net book value of such assets, together with the net book
     value of all other assets sold, transferred, leased, contributed or
     conveyed otherwise than in the ordinary course of business by the Borrower
     or any of its Subsidiaries pursuant to this Section 7.2.7(b) during the
                                                 ----------------
     most recent 12-month period since the Effective Date, does not exceed 10%
     of Net Tangible Assets computed as of the end of the most recent quarter
     preceding such sale; provided, however, that any such sales shall be
                          --------  -------
     disregarded for purposes of the limitation of this Section 7.2.7(b) if the
                                                        ----------------
     proceeds are invested in assets in similar or related lines of business of
     the Borrower, and provided further, that the Borrower may sell or otherwise
                       -------- -------
     dispose of assets in excess of such 10% if the proceeds from such sales or
     dispositions, which are not so reinvested, are retained by the Borrower as
     cash or Cash Equivalent Investments.

          SECTION 7.2.8  Transactions with Affiliates.  The Borrower will not
                         ----------------------------
enter into, or cause, suffer or permit to exist any arrangement or contract with
any of its Affiliates unless such arrangement or contract is fair and equitable
to the Borrower and is an arrangement or contract of the kind which would be
entered into by a prudent Person in the position of the Borrower with a Person
which is not one of its Affiliates.

          SECTION 7.2.9  Restrictive Agreements.  The Borrower will not, and
                         ----------------------
will not permit any of its Subsidiaries to, enter into any agreement (excluding
any Loan Document and any agreement governing any Indebtedness permitted by
clause (b) of Section 7.2.1 as to the assets financed with the proceeds of such
- ----------    -------------
Indebtedness) prohibiting:

          (a) the ability of the Borrower to amend or otherwise modify any Loan
     Document; or

          (b) the ability of any Subsidiary to make any payments, directly or
     indirectly, to the Borrower by way of dividend, advances, repayments of
     loans or advances, reimbursements of management and other intercompany
     charges, expenses and accruals or

                                      -36-
<PAGE>
 
     other returns on investments, or any other agreement or arrangement which
     restricts the ability of any such Subsidiary to make any payment, directly
     or indirectly, to the Borrower where such prohibition or restriction has a
     Material Adverse Effect.

          SECTION 7.3  ERISA.  The Borrower will not engage in any prohibited
                       -----
transactions under Section 406 of ERISA or under Section 4975 of the Internal
Revenue Code, which would subject the Borrower to any tax, penalty or other
liabilities having a Material Adverse Effect.

                                  ARTICLE VIII
                               EVENTS OF DEFAULT

          SECTION 8.1  Listing of Events of Default.  Each of the following
                       ----------------------------
events or occurrences described in this Section 8.1 shall constitute an "Event
                                        -----------                      -----
of Default".
- ----------

          SECTION 8.1.1  Non-Payment of Obligations.  The Borrower shall default
                         --------------------------
in the payment when due of any principal of or interest on any Loan or the
Borrower shall default (and such default shall continue unremedied for a period
of five Business Days) in the payment when due of any Facility Fee, Utilization
Fee or of any other Obligation.

          SECTION 8.1.2  Breach of Warranty.  Any representation or warranty of
                         ------------------
the Borrower made or deemed to be restated or remade in any Loan Document or any
other writing or certificate furnished by or on behalf of the Borrower to the
Administrative Agent or any Lender for the purposes of or in connection with any
Loan Document (including any certificates delivered pursuant to Article V) is or
shall be incorrect when made or deemed made in any material respect.

          SECTION 8.1.3  Non-Performance of Certain Covenants and Obligations.
                         ----------------------------------------------------
The Borrower shall default in the due performance and observance of any of its
obligations under Section 7.2 (other than Sections 7.2.4 and 7.2.8 ).
                  -----------             --------------     -----

          SECTION 8.1.4  Non-Performance of Other Covenants and Obligations.  
                         --------------------------------------------------
The Borrower shall default in the due performance and observance of any other
covenant or agreement contained in any Loan Document, and such default shall
continue unremedied for a period of 30 days after written notice thereof shall
have been given to the Borrower by the Administrative Agent.

          SECTION 8.1.5  Default on Other Indebtedness.  A default shall occur
                         -----------------------------
in the payment when due (subject to any applicable grace period), whether by
acceleration or otherwise, of any Indebtedness of the Borrower or a default
shall occur in the performance or observance of any obligation or condition with
respect to such Indebtedness if the effect of such default is to accelerate the
maturity of any such Indebtedness or such default shall continue unremedied for
any applicable period of time sufficient to permit the holder or holders of such
Indebtedness, or any trustee or agent for such holders, to cause such
Indebtedness to become due and payable

                                      -37-
<PAGE>
 
prior to its expressed maturity, in either case, such default having a principal
amount, individually or in the aggregate, in excess of $20,000,000 (other than
                                                                    ----------
Indebtedness described in Section 8.1.1  ).
                          --------------

          SECTION 8.1.6  Judgments.  Any judgment or order for the payment of
                         ---------
money in excess of $20,000,000 (taking into account any Insurance proceeds
payable under a policy where the insurer has accepted coverage without
reservation) shall be rendered against the Borrower and either:

          (a) enforcement proceedings shall have been commenced by any creditor
     upon such judgment or order; or

          (b) there shall be any period of fifteen (15) consecutive days during
     which a stay of enforcement of such judgment or order, by reason of a
     pending appeal or otherwise, shall not be in effect.

          SECTION 8.1.7  Pension Plans.  Any of the following events shall occur
                         -------------
with respect to any Pension Plan:

          (a) the institution of any steps by the Borrower, any member of its
     Controlled Group or any other Person to terminate a Pension Plan if, as a
     result of such termination, the Borrower or any such member could be
     required to make a contribution to such Pension Plan, or could reasonably
     expect to incur a liability or obligation to such Pension Plan, in excess
     of $20,000,000; or

          (b) a contribution failure occurs with respect to any Pension Plan
     sufficient to give rise to a Lien under Section 302(f) of ERISA.

          SECTION 8.1.8  Control of the Borrower.  Any Change in Control shall
                         -----------------------
     occur.

          SECTION 8.1.9  Bankruptcy, Insolvency.  The Borrower shall:
                         ----------------------

          (a) become insolvent or generally fail to pay, or admit in writing its
     inability or unwillingness to pay, debts as they become due;

          (b) apply for, consent to, or acquiesce in, the appointment of a
     trustee, receiver, sequestrator or other custodian for the Borrower or a
     substantial portion of its property, or make a general assignment for the
     benefit of creditors;

          (c) in the absence of such application, consent or acquiescence,
     permit or suffer to exist the appointment of a trustee, receiver,
     sequestration or other custodian for the Borrower or for a substantial part
     of its property, and such trustee, receiver, sequestration or other
     custodian shall not be discharged within 60 days, provided that nothing in
                                                       --------
     the Loan Documents shall prohibit or restrict any right the Administrative

                                      -38-
<PAGE>
 
     Agent or any Lender may have under applicable law to appear in any court
     conducting any relevant proceeding during such 60-day period to preserve,
     protect and defend its rights under the Loan Documents (and the Borrower
     shall not object to any such appearance);

          (d) permit or suffer to exist the commencement of any bankruptcy,
     reorganization, debt arrangement or other case or proceeding under any
     bankruptcy or insolvency law, or any dissolution, winding up or liquidation
     proceeding, in respect of the Borrower, and, if any such case or proceeding
     is not commenced by the Borrower, such case or proceeding shall be
     consented to or acquiesced in by the Borrower or shall result in the entry
     of an order for relief or shall remain for 60 days undismissed, provided
                                                                     --------
     that nothing in the Loan Documents shall prohibit or restrict any right the
     Administrative Agent or any Lender may have under applicable law to appear
     in any court conducting any such case or proceeding during such 60-day
     period to preserve, protect and defend its rights under the Loan Documents
     (and the Borrower shall not object to any such appearance); or

          (e) take any corporate action authorizing, or in furtherance of, any
     of the foregoing.

          SECTION 8.2  Action if Bankruptcy.  If any Event of Default described
                       --------------------
in clauses (a) through (e) of Section 8.1.9 shall occur with respect to the
   -----------         ---    -------------
Borrower, the Commitments (if not theretofore terminated) shall automatically
terminate and the outstanding principal amount of all outstanding Loans and all
other Obligations shall automatically be and become immediately due and payable,
without notice or demand.

          SECTION 8.3  Action if Other Event of Default.  If any Event of
                       --------------------------------
Default (other than any Event of Default described in clauses (a) through (e) of
                                                      -----------         ---
Section 8.1.9) shall occur for any reason, whether voluntary or involuntary, and
- --------------
be continuing, the Administrative Agent, upon the direction of the Required
Lenders, shall by written notice to the Borrower declare all or any portion of
the outstanding principal amount of the Loans and other Obligations to be due
and payable and/or the Commitments (if not theretofore terminated) to be
terminated, whereupon the full unpaid amount of such Loans and other Obligations
which shall be so declared due and payable shall be and become immediately due
and payable, without further notice, demand or presentment and/or, as the case
may be, the Commitments shall terminate.  The rights provided for in the Loan
Documents are cumulative and are not exclusive of any other rights, powers,
privileges or remedies provided by law or in equity, or under any other
instrument, document or agreement now existing or hereafter arising.

          SECTION 8.4  Rescission of Declaration.  Any declaration made pursuant
                       -------------------------
to Section 8.3 may, should the Required Lenders in their sole and absolute
   -----------
discretion so elect, be rescinded by written notice to the Borrower at any time
after the principal of the Loans and the Notes shall have become due and
payable, but before any judgment or decree for the payment of the monies so due,
or any part thereof, shall have been entered; provided that the Borrower shall
                                              --------
have paid all arrears of interest upon the Loans and all other amounts then owed
to the

                                      -39-
<PAGE>
 
Administrative Agent and the Lenders including all costs, expenses and
liabilities incurred by the Administrative Agent and the Lenders in respect of
such declaration and all consequences thereof (except that principal of the
Loans which by such declaration shall have become payable) and every other Event
of Default shall have been made good, waived or cured; provided that no such
                                                       --------
rescission or annulment shall extend to or affect any subsequent Event of
Default or impair any right consequent thereon.

                                   ARTICLE IX
                                   THE AGENT

          SECTION 9.1  Actions.  (a)  Each Lender hereby appoints CUSA as its
                       -------
Administrative Agent under and for purposes of each Loan Document.  Each Lender
authorizes the Administrative Agent to act on behalf of such Lender under each
Loan Document and, in the absence of other written instructions from the
Required Lenders received from time to time by the Administrative Agent (with
respect to which the Administrative Agent agrees that it will comply, except as
otherwise provided in this Section or as otherwise advised by counsel), to
exercise such powers hereunder and thereunder as are specifically delegated to
or required of the Administrative Agent by the terms hereof and thereof,
together with such powers as may be reasonably incidental thereto.
Notwithstanding any provision to the contrary contained elsewhere in any Loan
Document, the Administrative Agent shall not have any duties or
responsibilities, except those expressly set forth herein, nor shall the
Administrative Agent have or be deemed to have any fiduciary relationship with
any Lender, and no implied covenants, functions, responsibilities, duties,
obligations or liabilities shall be read into any Loan Document or otherwise
exist against the Administrative Agent.  Without limiting the generality of the
foregoing sentence, the use of the term "agent" in this Agreement with reference
to the Administrative Agent is not intended to connote any fiduciary or other
implied (or express) obligations arising under agency doctrine of any applicable
law.  Instead, such term is used merely as a matter of market custom, and is
intended to create or reflect only an administrative relationship between
independent contracting parties.

          (b) Each Lender hereby agrees to indemnify (which indemnity shall
survive any termination of this Agreement) the Agent-Related Persons pro rata
                                                                     --- ----
according to such Lender's Percentage, from and against any and all liabilities,
obligations, losses, damages, claims, costs or expenses of any kind or nature
whatsoever which may at any time be imposed on, incurred by, or asserted
against, the Agent-Related Persons in any way relating to or arising out of any
Loan Document, including reasonable attorneys' fees, and as to which the
Administrative Agent is not reimbursed by the Borrower; provided, however, that
                                                        --------  -------
no Lender shall be liable for the payment of any portion of such liabilities,
obligations, losses, damages, claims, costs or expenses which are determined by
a court of competent jurisdiction in a final proceeding to have resulted from
the Agent-Related Person's gross negligence or wilful misconduct.  No Agent-
Related Persons shall be required to take any action under any Loan Document, or
to prosecute or defend any suit in respect of or any Loan Document, unless it is
indemnified hereunder to its satisfaction.  If any indemnity in favor of the
Administrative Agent shall be or become, in its determination,

                                      -40-
<PAGE>
 
inadequate, the Agent-Related Person may call for additional indemnification
from the Lenders and cease to do the acts indemnified against hereunder until
such additional indemnity is given.

          SECTION 9.2  Funding Reliance.  Unless the Administrative Agent shall
                       ----------------
have been notified by telephone, confirmed in writing, by any Lender by 12:00
Noon, New York City time, on the Business Day prior to a Borrowing that such
Lender will not make available the amount which would constitute its Percentage
of such Borrowing on the date specified therefor, the Administrative Agent may
assume that such Lender has made such amount available to the Administrative
Agent and, in reliance upon such assumption, may, but shall not be required to,
make available to the Borrower a corresponding amount.  If and to the extent
that such Lender shall not have made such amount available to the Administrative
Agent, such Lender and the Borrower severally agree to repay the Administrative
Agent forthwith on demand such corresponding amount together with interest
thereon, for each day from the date the Administrative Agent made such amount
available to the Borrower to the date such amount is repaid to the
Administrative Agent, at the interest rate applicable at the time to Loans
comprising such Borrowing; provided, that if such Lender makes available the
                           --------
amount which is its Percentage of such Borrowing on or before the next Business
Day following the day when due, the interest rate payable on such amount shall
be the Federal Funds Rate.

          SECTION 9.3  Exculpation.  No Agent-Related Person shall be liable to
                       -----------
any Lender for any action taken or omitted to be taken by it under or any Loan
Document, or in connection therewith, except for its own wilful misconduct or
gross negligence, nor responsible for any recitals or warranties herein or
therein, nor for the effectiveness, enforceability, validity or due execution of
any Loan Document, nor to make any inquiry respecting the performance by the
Borrower of its obligations under any  Loan Document.  Any such inquiry which
may be made by the Administrative Agent shall not obligate it to make any
further inquiry or to take any action.  Each Agent-Related Person shall be
entitled to rely upon advice of counsel concerning legal matters and upon any
notice, consent, certificate, statement or writing which the Administrative
Agent believes to be genuine and to have been presented by a proper Person.

          SECTION 9.4  Successor.  The Administrative Agent may resign as such
                       ---------
at any time upon at least 30 days' prior notice to the Borrower and all Lenders.
If the Administrative Agent at any time shall resign, the Required Lenders may,
within ten (10) days after such notice and with the consent of the Borrower (not
to be unreasonably withheld), appoint another Lender as a successor
Administrative Agent which shall thereupon become the Administrative Agent
hereunder.  If no successor Administrative Agent shall have been so appointed by
the Required Lenders, and shall have accepted such appointment, within 30 days
after the retiring Administrative Agent's giving notice of resignation, then the
retiring Administrative Agent may, on behalf of the Lenders, after notice to and
consultation with the Borrower, appoint a successor Administrative Agent, which
shall be one of the Lenders or an Eligible Assignee, and shall have a combined
capital and surplus of at least $250,000,000.  Upon the acceptance of any
appointment as Administrative Agent hereunder by a successor Administrative
Agent, such successor Administrative Agent shall be entitled to receive from the
retiring Administrative Agent such documents of transfer and assignment as such
successor Administrative Agent may reasonably

                                      -41-
<PAGE>
 
request, and shall thereupon succeed to and become vested with all rights,
powers, privileges and duties of the retiring Administrative Agent, and the
retiring Administrative Agent shall be discharged from its duties and
obligations under this Agreement.  After the effective date of any retiring
Administrative Agents resignation hereunder as the Administrative Agent, the
provisions of (a) this Article IX shall inure to its benefit as to any actions
                       ----------
taken or omitted to be taken by it while it was the Administrative Agent under
this Agreement; and (b) Section 10.3 and Section 10.4 shall continue to inure to
                        ------------     ------------
its benefit.

          SECTION 9.5  Loans by CUSA.  CUSA shall have the same rights and
                       -------------
powers with respect to the Loans made by it or any of its Affiliates as any
other Lender and may exercise the same as if it were not the Administrative
Agent.  CUSA and its Affiliates may accept deposits from, lend money to, and
generally engage in any kind of business with the Borrower or any Subsidiary or
Affiliate of the Borrower as if CUSA were not the Administrative Agent
hereunder.

          SECTION 9.6  Reliance by Administrative Agent. (a)  The Administrative
                       --------------------------------
Agent shall be entitled to rely, and shall be fully protected in relying, upon
any writing, resolution, notice, consent, certificate, affidavit, letter,
telegram, facsimile, telex or telephone message, statement or other document or
conversation believed by it to be genuine and correct and to have been signed,
sent or made by the proper Person or Persons, and upon advice and statements of
legal counsel (including counsel to the Company), independent accountants and
other experts selected by the Administrative Agent. The Administrative Agent
shall be fully justified in failing or refusing to take any action under any
Loan Document unless it shall first receive such advice or concurrence of the
Required Lenders as it deems appropriate and, if it so requests, it shall first
be indemnified to its satisfaction by the Lenders against any and all liability
and expense which may be incurred by it by reason of taking or continuing to
take any such action. The Administrative Agent shall in all cases be fully
protected in acting, or in refraining from acting, under any Loan Document in
accordance with a request or consent of the Required Lenders and such request
and any action taken or failure to act pursuant thereto shall be binding upon
all of the Lenders.

          (b) For purposes of determining compliance with the conditions
specified in Section 5.1, each Lender that has executed this Agreement shall be
             -----------
deemed to have consented to, approved or accepted or to be satisfied with, each
document or other matter either sent by the Administrative Agent to such Lender
for consent, approval, acceptance or satisfaction, or required thereunder to be
consented to or approved by or acceptable or satisfactory to the Lender.

          SECTION 9.7  Notice of Default.  The Administrative Agent shall not be
                       -----------------
deemed to have knowledge or notice of the occurrence of any Default or Event of
Default, except with respect to defaults in the payment of principal, interest
and fees required to be paid to the Administrative Agent for the account of the
Lenders, unless the Administrative Agent shall have received written notice from
a Lender or the Borrower referring to this Agreement, describing such Default or
Event of Default and stating that such notice is a "notice of default".  The
Administrative Agent will notify the Lenders of its receipt of any such notice.
The Administrative Agent shall take such action with respect to such Default or
Event of Default as may be requested

                                      -42-
<PAGE>
 
by the Required Lenders in accordance with Article VIII; provided, however, that
                                                         --------  -------
unless and until the Administrative Agent has received any such request, the
Administrative Agent may (but shall not be obligated to) take such action, or
refrain from taking such action, with respect to such Default or Event of
Default as it shall deem advisable or in the best interest of the Lenders.

          SECTION 9.8  Credit Decisions.  Each Lender acknowledges that it has,
                       ----------------
independently of the Agent-Related Person and each other Lender, and based on
such Lender's review of the financial information of the Borrower, the Loan
Documents (the terms and provisions of which being satisfactory to such Lender)
and such other documents, information and investigations as such Lender has
deemed appropriate, made its own credit decision to extend its Commitments.
Each Lender also acknowledges that it will, independently of the Administrative
Agent and each other Lender, and based on such other documents, information and
investigations as it shall deem appropriate at any time, continue to make its
own credit decisions as to exercising or not exercising from time to time any
rights and privileges available to it under any Loan Document.

          SECTION 9.9  Copies.  The Administrative Agent shall give prompt
                       ------
notice to each Lender of each notice or request required or permitted to be
given to the Administrative Agent by the Borrower pursuant to the terms of this
Agreement (unless concurrently delivered to the Lenders by the Borrower).  The
Administrative Agent will distribute to each Lender each document or instrument
received for its account and copies of all other communications received by the
Administrative Agent from the Borrower for distribution to the Lenders by the
Administrative Agent in accordance with the terms of this Agreement.

                                   ARTICLE X
                            MISCELLANEOUS PROVISIONS

          SECTION 10.1  Waivers, Amendments.  (a)  The provisions of each Loan
                        -------------------
Document may from time to time be amended, modified or waived, if such
amendment, modification or waiver is in writing and consented to by the Borrower
and the Required Lenders; provided, however, that no such amendment,
                          --------  -------
modification or waiver shall (i) forgive the principal amount or extend the
final scheduled date of maturity of any Loan, reduce the stated rate of any
interest or fee payable hereunder or extend the scheduled date of any payment
thereof, or increase the amount or extend the expiration date of any Lender's
Commitment without the consent of each Lender directly affected thereby; (ii)
amend, modify or waive any provision of this Section 10.1 or any percentage
                                             ------------
specified in the definition of Required Lenders, or consent to the assignment or
transfer by the Borrower of any of its rights and obligations under the Loan
Documents, in each case without the written consent of all Lenders; (iii) amend,
modify or waive any pro rata provision of Section 4.9, or any provision in the
                    --- ----              -----------
Loan Documents which provides for amounts paid in respect of the Obligations to
be shared among the Lenders ratably, without the consent of all Lenders.  Any
such waiver and any such amendment, supplement or modification shall apply
equally to each of the Lenders and shall be binding upon the Borrower, the
Lenders, the Administrative Agent and all future holders of the Loans.  In the
case of any waiver, the Borrower and its Subsidiaries, the Lenders and the
Administrative Agent shall be restored to their

                                      -43-
<PAGE>
 
former position and rights and under the 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.

          (b) No failure or delay on the part of the Administrative Agent or any
Lender in exercising any power or right under any Loan Document shall operate as
a waiver thereof, nor shall any single or partial exercise of any such power or
right preclude any other or further exercise thereof or the exercise of any
other power or right.  No notice to or demand on the Borrower in any case shall
entitle it to any notice or demand in similar or other circumstances.  No waiver
or approval by the Administrative Agent or any Lender under any  Loan Document
shall, except as may be otherwise stated in such waiver or approval, be
applicable to subsequent transactions.  No waiver or approval hereunder shall
require any similar or dissimilar waiver or approval thereafter to be granted
hereunder.

          SECTION 10.2  Notices.  All notices and other communications provided
                        -------
to any party hereto under any Loan Document shall be in writing or by facsimile
and addressed, delivered or transmitted to such party at its address or
facsimile number set forth on Schedule 1.1(b) or set forth in the Lender
                              ---------------
Assignment Agreement or at such other address or facsimile number as may be
designated by such party in a written notice to the other parties. Any notice,
if mailed and properly addressed with postage prepaid shall be effective five
Business Days after being sent or if properly addressed and sent by pre-paid
courier service, shall be deemed given when received; any notice, if transmitted
by facsimile, shall be deemed given when transmitted (if confirmed).

          SECTION 10.3  Payment of Costs and Expenses.  (a)  The Borrower agrees
                        -----------------------------
to pay promptly on demand all reasonable costs and expenses of the Lead
Arrangers and the Administrative Agent (including the reasonable fees and out-
of-pocket costs and expenses of counsel to the Administrative Agent) in
connection with:

               (i)  the negotiation, preparation, execution and delivery of each
          Loan Document, including schedules and exhibits, and any amendments,
          waivers, consents, supplements or other modifications to any Loan
          Document as may from time to time hereafter be required; and

               (ii) the preparation and review of the form of any document or
          instrument relevant to any Loan Document; provided, however, that the
                                                    --------  -------
          Borrower shall have no obligation to pay for the cost of the
          documentation of assignments or participations as provided in Section
                                                                        -------
          10.11 (unless such assignment is made pursuant to Section 4.11);
          -----                                             -------------

in each case, upon presentation of statement of account, whether or not the
transactions contemplated hereby are consummated.

          (b) The Borrower further agrees to pay upon demand, and to save the
Administrative Agent and the Lenders harmless from all liability for, any stamp
or other taxes

                                      -44-
<PAGE>
 
which may be payable in connection with the execution, delivery or enforcement
of any Loan Document or with the Borrowings hereunder.  The Borrower also agrees
to reimburse the Administrative Agent and each Lender, as applicable, promptly
upon demand for (x) all reasonable out-of-pocket costs and expenses (including
fees and out-of-pocket expenses of counsel) incurred by the Administrative Agent
and each Lender in connection with the negotiation of any restructuring or work-
out, whether or not consummated, of any Obligations and (y) all out-of-pocket
costs and expenses (including fees and out-of-pocket costs and expenses of
counsel) by the Administrative Agent and each Lender in connection with the
enforcement of any Obligations after an Event of Default; provided that, in
                                                          --------
either case, the Borrower shall not be obligated to reimburse such costs and
expenses that are found in a final judgment by a court of competent jurisdiction
to have been incurred in an attempt to enforce such rights and remedies that
were pursued by such Administrative Agent or Lender in bad faith and without any
reasonable basis in fact or law.

          SECTION 10.4  Indemnification.  (a) In consideration of the execution
                        ---------------
and delivery of this Agreement by each Lender and the extension of the
Commitments, the Borrower hereby indemnifies, exonerates and holds the
Administrative Agent, the Lead Arrangers and each Lender and each of their
respective affiliates, officers, directors and employees (collectively, the
"Indemnified Parties") free and harmless from and against any and all losses,
 -------------------
costs, actions, causes of action, suits, liabilities and damages, and expenses
incurred in connection therewith (irrespective of whether any such Indemnified
Party is a party to the action for which indemnification hereunder is sought),
including any amounts paid to any Agent-Related Person pursuant to Section
                                                                   -------
9.1(b) and reasonable attorneys' fees and disbursements but excluding claims for
- ------
lost profits (collectively, the "Indemnified Liabilities"), joint or several,
                                 -----------------------
that may be incurred by or asserted or awarded against any Indemnified Party, in
each case arising out of or in connection with or relating to:

          (i) any transaction financed or to be financed in whole or in part,
     directly or indirectly, with the proceeds of any Loan;

          (ii) the entering into and performance of any Loan Document by any of
     the Indemnified Parties (including any action brought by or on behalf of
     the Borrower as the result of any determination by the Required Lenders
     pursuant to Article VI not to fund any Borrowing);
                 ----------

          (iii)  any investigation, litigation, proceeding, or obligation
     related to any Environmental Law or other matter in any case arising out of
     the relationship of the parties under this Agreement; or

          (iv) the presence on or under, or the escape, seepage, leakage,
     spillage, discharge, emission or release from, any real property owned,
     leased or operated by any Loan Party thereof of any Hazardous Material
     (including any losses, liabilities, damages, injuries, costs, expenses or
     claims asserted or arising under any Environmental Law), or at any other
     locations regardless of whether caused by, or

                                      -45-
<PAGE>
 
     within the control of, such Loan Party, where such claim or liability
     arises out of the relationship of the parties under this Agreement;

whether or not such investigation, litigation or proceeding is brought by the
Borrower or its Affiliates, any of their respective shareholders or creditors,
an Indemnified Party or any other person, or an Indemnified Party is otherwise a
party thereto and whether or not the transactions contemplated hereby are
consummated, except for any such Indemnified Liabilities arising for the account
of a particular Indemnified Party by reason of the relevant Indemnified Party's
(i) gross negligence or willful misconduct or (ii) breach of such Indemnified
Party's obligations under this Agreement.  If and to the extent that the
foregoing undertaking may be unenforceable for any reason, the Borrower hereby
agrees to make the maximum contribution to the payment and satisfaction of each
of the Indemnified Liabilities which is permissible under applicable law.

          (b) To the extent permitted by applicable law, no Indemnified Party
shall have any liability to the Borrower or its Affiliates or any of their
respective shareholders or creditors under 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
or any agreement or instrument contemplated hereby, any Loan or the use of the
proceeds thereof.

          SECTION 10.5  Survival.  The obligations of the Borrower under
                        --------
Sections 4.3, 4.5 ,  4.6 ,  4.7 ,  10.3  and  10.4 , and the obligations of the
- ------------  ---    ---    ---    ----       ----
Lenders under Section 9.1, shall in each case survive any termination of this
              -----------
Agreement, the payment in full of all Obligations and the termination of all
Commitments.  The representations and warranties made by the Borrower in each
Loan Document shall survive the execution and delivery of such Loan Document.

          SECTION 10.6  Severability.  Any provision of any Loan Document which
                        ------------
is prohibited or unenforceable in any jurisdiction shall, as to such provision
and such jurisdiction, be ineffective to the extent of such prohibition or
unenforceability without invalidating the remaining provisions of such Loan
Document or affecting the validity or enforceability of such provision in any
other jurisdiction.

          SECTION 10.7  Headings.  The various headings of each Loan Document
                        --------
are inserted for convenience only and shall not affect the meaning or
interpretation of such other Loan Document or any provisions hereof or thereof.

          SECTION 10.8  Execution in Counterparts.  This Agreement may be
                        -------------------------
executed by the parties hereto in several counterparts, each of which shall be
executed by the Borrower and the Administrative Agent and be deemed to be an
original and all of which shall constitute together but one and the same
agreement.

          SECTION 10.9  Governing Law; Entire Agreement.  This Agreement, the
                        -------------------------------
Notes 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 New York.  The Loan Documents, together with the fee letter referred to
in Section 3.3.3 and the commitment letter of
   -------------

                                      -46-
<PAGE>
 
even date therewith, represent the agreement of the Borrower, the Administrative
Agent and the Lenders and supersede any and all prior agreements and
understandings, oral or written, relative or with respect to the subject matter
hereof, and there are no promises, undertakings, representations or warranties
by the Administrative Agent or any Lender relative to subject matter hereof not
expressly set forth or referred to in the Loan Documents.

          SECTION 10.10  Successors and Assigns.  This Agreement shall be
                         ----------------------
binding upon and shall inure to the benefit of the parties hereto and their
respective successors and assigns; provided, however, that:
                                   --------  -------

          (a) the Borrower may not assign or transfer its rights or obligations
     hereunder without the prior written consent of the Administrative Agent and
     all Lenders; and

          (b)  the rights of sale, assignment and transfer of the Lenders are
     subject to Section 10.11.
                -------------

          SECTION 10.11  Sale and Transfer of Loans and Notes; Participations in
                         -------------------------------------------------------
Loans and Notes.  Each Lender may assign, or sell participations in, its Loans
- ---------------
and Commitments to one or more other Persons in accordance with this Section
                                                                     -------
10.11.
- -----

          SECTION 10.11.1  Assignments.  (a)  Any Lender (an "Assignor") may, in
                           -----------                        --------
accordance with applicable law, at any time and from time to time assign to any
Eligible Assignee, with the consent of the Administrative Agent and, except at
any time a Default or Event of Default shall have occurred and be continuing,
the Borrower (which, in each case, shall not be unreasonably withheld or
delayed), all or any part of its rights and obligations under this Agreement
pursuant to a Lender Assignment Agreement, executed by such Eligible Assignee,
such Assignor and any other Person whose consent is required pursuant to this
paragraph, and delivered to the Administrative Agent for its acceptance and
recording in the Register; provided that no such assignment to an Eligible
                           --------
Assignee (other than any Lender or any affiliate thereof) shall be in an
aggregate principal amount of less than $10,000,000  (other than in the case of
an assignment of all of a Lender's interests under this Agreement), unless
otherwise agreed by the Borrower and the Administrative Agent and; provided,
                                                                   --------
further, that after giving effect to any such assignment the assigning Lender
- -------
shall have a Commitment remaining of at least $10,000,000 in the aggregate
amount (other than in the case of an assignment of all of a Lender's interests
under this Agreement).  Upon such execution, delivery, acceptance and recording,
from and after the effective date determined pursuant to such Lender Assignment
Agreement, (x) the Eligible Assignee thereunder shall be a party hereto and, to
the extent provided in such Lender Assignment Agreement, have the rights and
obligations of a Lender hereunder with a Commitment and/or Loans as set forth
therein, and (y) the Assignor thereunder shall, to the extent provided in such
Lender Assignment Agreement, be released from its obligations under this
Agreement (and, in the case of a Lender Assignment Agreement covering all of an
Assignor's rights and obligations under this Agreement, such Assignor shall
cease to be a party hereto).  Notwithstanding any provision of this Section
                                                                    -------
10.11, the consent of the Borrower shall not be
- -----

                                      -47-
<PAGE>
 
required for any assignment that occurs when a Default or an Event of Default
pursuant to Section 8.1 shall have occurred and be continuing with respect to
            -----------
the Borrower.

          (b) The Administrative Agent shall, on behalf of the Borrower,
maintain at its address referred to on Schedule 1.1(b) a copy of each Lender
                                       ---------------
Assignment Agreement delivered to it and a register (the "Register") for the
                                                          --------
recordation of the names and addresses of the Lenders and the Commitment of, and
the principal amount of the Loans owing to, each Lender from time to time.  The
entries in the Register shall be conclusive, in the absence of manifest error,
and the Borrower, the Administrative Agent and the Lenders shall treat each
Person whose name is recorded in the Register as the owner of the Loans and any
Notes evidencing the Loans recorded therein for all purposes of this Agreement.
Any assignment of any Loan, whether or not evidenced by a Note, shall be
effective only upon appropriate entries with respect thereto being made in the
Register (and each Note shall expressly so provide).  Any assignment or transfer
of all or part of a Loan evidenced by a Note shall be registered on the Register
only upon surrender for registration of assignment or transfer of the Note
evidencing such Loan, accompanied by a duly executed Lender Assignment
Agreement, and thereupon one or more new Notes shall be issued to the designated
Eligible Assignee.

          (c)  Upon its receipt of a Lender Assignment Agreement executed by an
Assignor, an Eligible Assignee and any other Person whose consent is required by
Section 10.11.1(a), together with payment to the Administrative Agent of a
- ------------------
registration and processing fee of $3,000, the Administrative Agent shall (i)
promptly accept such Lender Assignment Agreement and (ii) record the information
contained therein in the Register on the effective date determined pursuant
thereto.

          (d)  For avoidance of doubt, the parties to this Agreement acknowledge
that the provisions of this Section 10.11.1 concerning assignments of Loans
                            ---------------
relate only to absolute assignments and that such provisions do not prohibit
assignments creating security interests, including any pledge or assignment by a
Lender of any Loan or Note to any Federal Reserve Bank in accordance with
applicable law.

          (e)  The Borrower, upon receipt of written notice from the relevant
Lender, agrees to issue Notes to any Lender requiring Notes to facilitate
transactions of the type described in paragraph (d) of this Section 10.11.1.
                                      -------------         ---------------

          SECTION 10.11.2  Participations.  Any Lender may at any time sell to
                           --------------
one or more commercial banks or other Persons (each of such commercial banks and
other Persons being herein called a "Participant") participating interests in
                                     -----------
any of the Loans, Commitments, or other interests of such Lender hereunder;
provided, however, that:
- --------  -------

          (a) no participation contemplated in this Section 10.11.2 shall
                                                    ---------------
     relieve such Lender from its Commitments or its other obligations under any
     Loan Document;
                                      -48-
<PAGE>
 
          (b) such Lender shall remain solely responsible for the performance of
     its Commitments and such other obligations;

          (c) the Borrower and the Administrative Agent shall continue to deal
     solely and directly with such Lender in connection with such Lender's
     rights and obligations under each of the Loan Documents;

          (d) no Participant, unless such Participant is an Affiliate of such
     Lender, or is itself a Lender, shall be entitled to require such Lender to
     take or refrain from taking any action under any Loan Document, except as
     provided in clause (f) of this Section 10.11.2;
                 ----------         ---------------

          (e) the Borrower shall not be required to pay any amount under
     Sections 4.3, 4.4 ,  4.5 ,  4.6 ,  4.7 ,  4.8 ,  4.9 ,  10.3  and  10.4 ,
     ------------  ---    ---    ---    ---    ---    ---    ----       ----
     that is greater than the amount which it would have been required to pay
     had no participating interest been sold;

          (f) in no event shall any Participant under any such participation
     have any right to approve any amendment or waiver of any provision of any
     Loan Document, or any consent to any departure by the Borrower therefrom,
     except to the extent that such amendment, waiver or consent would reduce
     the principal of, or interest on, the Loans or any fees payable hereunder,
     extend the due date of such principal, interest or fee payments or increase
     the amount or extend the Commitment Termination Date of such Loans, in each
     case to the extent subject to such participation;

          (g) the Borrower agrees that if amounts outstanding under this
     Agreement and the Loans are due or unpaid, or shall have been declared or
     shall have become due and payable upon the occurrence of an Event of
     Default, each Participant shall, to the maximum extent permitted by
     applicable law, be deemed to have the right of setoff in respect of its
     participating interest in amounts owing under this Agreement to the same
     extent as if the amount of its participating interest were owing directly
     to it as a Lender under this Agreement, provided that, in purchasing such
                                             --------
     participating interest, such Participant shall be deemed to have agreed to
     share with the Lenders the proceeds thereof as provided in Section 4.10 as
                                                                ------------
     fully as if it were a Lender hereunder; and

          (h) the Borrower also agrees that each Participant shall be entitled
     to the benefits of Sections 4.3,  4.6  and  4.7  with respect to its
                        ------------   ---       ---
     participation in the  Commitments, and the Loans outstanding from time to
     time as if it was a Lender; provided that, in the case of Section 4.7, such
                                 --------                      -----------
     Participant shall have complied with the requirements of said Section and
     provided, further, that no Participant shall be entitled to receive any
     --------  -------
     greater amount pursuant to any such Section than the transferor Lender
     would have been entitled to receive in respect of the amount of the
     participation transferred by such transferor Lender to such Participant had
     no such transfer occurred.

          SECTION 10.12  Other Transactions.  Nothing contained herein shall
                         ------------------
preclude the Administrative Agent or any other Lender from engaging in any
transaction, in addition to those

                                      -49-
<PAGE>
 
contemplated by any Loan Document, with the Borrower or any of its Affiliates in
which the Borrower or such Affiliate is not restricted hereby from engaging with
any other Person.

          SECTION 10.13  Submission To Jurisdiction; Waivers.  Each of the
                         -----------------------------------
Borrower, the Administrative Agent and the Lenders hereby irrevocably and
unconditionally:

          (a)  submits for itself and its property in any legal action or
     proceeding relating to the 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 New York, the
     courts of the United States for the Southern District of New York, and
     appellate courts from any thereof;

          (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 such
     Person at its address set forth on Schedule 1.1(b) or at such other address
                                        ---------------
     of which the Administrative Agent shall have been notified pursuant to
     Section 10.2;
     ------------

          (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.

          SECTION 10.14  WAIVERS OF JURY TRIAL.  THE BORROWER, THE
                         ---------------------
ADMINISTRATIVE AGENT AND THE LENDERS HEREBY IRREVOCABLY AND UNCONDITIONALLY
WAIVE TRIAL BY JURY IN ANY LEGAL ACTION OR PROCEEDING RELATING TO ANY LOAN
DOCUMENT AND FOR ANY COUNTERCLAIM THEREIN.

          SECTION 10.15  Non-Recourse Persons.  The Lenders acknowledge that no
                         --------------------
Non-Recourse Person shall have any responsibility or liability for the
Obligations.

          SECTION 10.16  Acknowledgments.  The Borrower hereby acknowledges
                         ---------------
that:

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

                                      -50-
<PAGE>
 
          (b) neither the Administrative Agent nor any Lender has any fiduciary
     relationship with or duty to the Borrower arising out of or in connection
     with any of the Loan Documents, and the relationship between Administrative
     Agent and Lenders, on one hand, and the Borrower, on the other hand, in
     connection herewith or therewith is solely that of debtor and creditor; and

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

          SECTION 10.17  Confidentiality.  Each of the Administrative Agent and
                         ---------------
each Lender agrees to keep confidential all non-public information provided to
it by the Borrower pursuant to this Agreement; provided that nothing herein
                                               --------
shall prevent the Administrative Agent or any Lender from disclosing any such
information (a) to the Administrative Agent, any other Lender or any affiliate
of any Lender, (b) to any transferee or prospective transferee that agrees to
comply with the provisions of this Section 10.17, (c) to its employees,
                                   -------------
directors, agents, attorneys, accountants and other professional advisors or
those of any of its affiliates, (d) upon the request or demand of any
governmental authority, (e) in response to any order of any court or other
governmental authority or as may otherwise be required pursuant to any
Requirement of Law, (f) if requested or required to do so in connection with any
litigation or similar proceeding, (g) that has been publicly disclosed, (h) to
the National Association of Insurance Commissioners or any similar organization
or any nationally recognized rating agency that requires access to information
about a Lender's investment portfolio in connection with ratings issued with
respect to such Lender, or (i) in connection with the exercise of any remedy
under any Loan Document.

                                      -51-
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed by their respective officers as of the day and year first above
written.
                                    EDISON MISSION ENERGY


                                    By:__________________________________
                                         Name:  Kevin M. Smith
                                         Title: Vice President and Treasurer


                                    CITICORP USA, INC.,
                                    as Administrative Agent and Initial Lender


                                    By:__________________________________
                                         Name:
                                         Title:


                                    CREDIT SUISSE FIRST BOSTON,
                                    as Initial Lender


                                    By:__________________________________
                                         Name:
                                         Title:


                                    LEHMAN COMMERCIAL PAPER INC.,
                                    as Initial Lender


                                    By:__________________________________
                                         Name:
                                         Title:


                                    SOCIETE GENERALE,
                                    as Initial Lender


                                    By:__________________________________
                                         Name:
                                         Title:


                                    [Additional Lenders]

                                      -52-
<PAGE>
 
                                                                         ANNEX I
                                  Pricing Grid


<TABLE>
<CAPTION>
BASIS FOR PRICING                  LEVEL 1    LEVEL 2    LEVEL 3    LEVEL 4    LEVEL 5
<S>                               <C>        <C>        <C>        <C>        <C>
Applicable Margin                 40.00 bps  50.00 bps  60.00 bps  80.00 bps  160.00 bps
(LIBO Rate Loans
Applicable Margin                  0.00 bps   0.00 bps   0.00 bps   0.00 bps    0.00 bps
(Base Rate Loans)
Facility Fee  (1)                 10.00 bps  12.50 bps  15.00 bps  20.00 bps   40.00 bps
Utilization Fee                   
(0% less than or equal to          0.00 bps   0.00 bps   0.00 bps   0.00 bps    0.00 bps
n less than 33 1/3%)
(33 1/3% less than or equal       12.50 bps  12.50 bps  12.50 bps  12.50 bps   12.50 bps
to n less than 66 2/3%) 
(66 2/3% less than or             12.50 bps  12.50 bps  12.50 bps  12.50 bps   12.50 bps
equal to n less than 
or equal to 100%)

          n=usage  (2)
</TABLE>

(1)  Paid quarterly in arrears on each bank's commitment irrespective of usage.
(2)  The percentage of total outstanding Loans as compared to the total
     commitment amount.
<PAGE>
 
          bps = basis points per annum

                                      -54-
<PAGE>
 
          The Applicable Margin shall be determined at Level 1 so long as the
                                                       -------
          Borrower's Debt Rating is A3 or better by Moody's and A- or better by
          S&P.

          The Applicable Margin shall be determined at Level 2 so long as the
                                                       -------
          Borrower's Debt Rating is Baa1 by Moody's and BBB+ by S&P.

          The Applicable Margin shall be determined at Level 3 so long as the
                                                       -------
          Borrower's Debt Rating is Baa2 by Moody's and BBB by S&P.

          The Applicable Margin shall be determined at Level 4 so long as the
                                                       -------
          Borrower's Debt Rating is Baa3 by Moody's and BBB- by S&P.

          The Applicable Margin shall be determined at Level 5 so long as the
                                                       -------
          Borrower's Debt Rating is lower than Baa3 by Moody's and BBB- by S&P,
          or if the Borrower has not received a final Debt Rating before June 1,
          1999.

          In the event that the Debt Rating established by Moody's is at a
          different Level than the Debt Rating established by S&P, the lower
          Debt Rating shall apply and the Level associated with such lower
          rating shall be the Applicable Margin, except that, in the event that
          the difference is greater than one rating Level, the average of the
          two Debt Ratings by Moody's and by S&P shall apply to determine the
          Applicable Margin.

          Changes in the Level for determining the Applicable Margin resulting
          from a change in rating(s) shall become effective on the day such
          change in the ratings is announced by the relevant rating agency.  In
          the event that the Borrower   does not maintain a Debt Rating with
          both Moody's and S&P, the Borrower may, with the reasonable consent of
          Required Lenders, select Duff & Phelps, Fitch Investor Services Inc.
          or another nationally recognized rating agency to replace Moody's or
          S&P, and such replacement agency and the Debt Rating established by
          such agency shall be used thereafter in the calculation of Applicable
          Margin in the same fashion as the agency which no longer maintains
          such Debt Rating.  From the date which the Debt Rating of Moody's or
          S&P ceases to be current until the date which is 120 days thereafter,
          the Applicable Margin shall be determined by reference to the Debt
          Ratings of Moody's and S&P most recently in effect.  In the event that
          such replacement agency has not established a Debt Rating within 120
          days after the Debt Rating of Moody's or S&P ceases to be current,
          then, until such time as such Debt Rating is established, the
          Applicable Margin shall be determined at one Level lower than the
          Level otherwise established based on the remaining Debt Rating.


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