ILLINOIS POWER CO
10-Q/A, 2000-02-28
ELECTRIC & OTHER SERVICES COMBINED
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                               UNITED STATES
                    SECURITIES AND EXCHANGE COMMISSION
                          Washington, D. C. 20549


                                 Form 10-Q/A

           (X) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                  OF THE SECURITIES EXCHANGE ACT OF 1934

               For the quarterly period ended March 31, 1999

                                    OR
           ( ) TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
                  OF THE SECURITIES EXCHANGE ACT OF 1934

          For the transition period from __________to __________

Commission      Registrants; State of Incorporation;        IRS Employer
File Number      Address; and Telephone Number             Identification No.

   1-11327          Illinova Corporation                      37-1319890
                    (an Illinois Corporation)
                    500 S. 27th Street
                    Decatur, IL  62521
                    (217) 424-6600

   1-3004           Illinois Power Company                    37-0344645
                    (an Illinois Corporation)
                    500 S. 27th Street
                    Decatur, IL  62521
                    (217) 424-6600

         Indicate  by check  mark  whether  the  registrants  (1) have filed all
reports  required to be filed by Section 13 or 15(d) of the Securities  Exchange
Act of 1934 during the preceding 12 months (or for such shorter  period that the
registrant was required to file such report),  and (2) have been subject to such
filing requirements for the past 90 days.

                             Illinova        Yes  X       No
                             Corporation        ----        ----

                             Illinois Power  Yes  X       No
                             Company            ----        ----

         Indicate  the  number of  shares  outstanding  of each of the  issuers'
classes of common stock, as of the latest practicable date:

Illinova Corporation          Common stock, no par value, 69,919,287
                              shares outstanding at April 30, 1999

Illinois Power Company        Common stock, no par value, 62,892,213
                              shares  outstanding  held by Illinova
                              Corporation at April 30, 1999


<PAGE>

                                 ILLINOVA CORPORATION
                                ILLINOIS POWER COMPANY

This  combined  Form  10-Q/A is  separately  filed by Illinova  Corporation  and
Illinois Power Company.  Information contained herein relating to Illinois Power
Company is filed by  Illinova  Corporation  and  separately  by  Illinois  Power
Company on its own behalf.  Illinois Power Company makes no representation as to
information relating to Illinova  Corporation or its subsidiaries,  except as it
may relate to Illinois Power Company.

                      FORM 10-Q/A FOR THE QUARTER ENDED March 31, 1999
                                         INDEX
                                                                     PAGE NO.
Part I.  FINANCIAL INFORMATION

   Item 1:  Financial Statements

            Illinova Corporation

                 Consolidated Balance Sheets                         3 - 4
                 Consolidated Statements of Income                       5
                 Consolidated Statements of Comprehensive Income         6
                 Consolidated Statements of Cash Flows                   7

            Illinois Power Company

                 Consolidated Balance Sheets                         8 - 9
                 Consolidated Statements of Income                      10
                 Consolidated Statements of Comprehensive Income        11
                 Consolidated Statements of Cash Flows                  12

            Notes to Consolidated Financial Statements of
                 Illinova Corporation and
                 Illinois Power Company                            13 - 26

   Item 2:  Management's Discussion and Analysis of
                 Financial Condition and Results of
                 Operations for Illinova Corporation
                 and Illinois Power Company                        27 - 44

   Item 3:  Quantitative and Qualitative Disclosures
                 About Market Risk                                 45 - 47

Part II.  OTHER INFORMATION

   Item 6:  Exhibits and Reports on Form 8-K and 8-K/A                  48

   Signatures                                                      49 - 50

   Exhibit Index                                                        51


                                       2
<PAGE>

                           PART I. FINANCIAL INFORMATION
                                ILLINOVA CORPORATION
                           CONSOLIDATED BALANCE SHEETS AS RESTATED
                 (See accompanying Notes to Consolidated Financial Statements)

                                                       MARCH 31,    DECEMBER 31,
                                                         1999          1998
ASSETS                                               (Unaudited)     (Audited)
                                                        (Millions of Dollars)
Utility Plant
    Electric (includes construction work
               in progress of $139.4 million and
               $177.7 million, respectively)           $5,496.0         $5,481.8
    Gas (includes construction work
               in progress of $14.8 million and
               $15.3 million, respectively)               690.5            686.9
                                                       ---------        --------
                                                        6,186.5          6,168.7
Less - Accumulated depreciation                         1,736.6          1,713.7
                                                       ---------        --------
                                                        4,449.9          4,455.0
Nuclear fuel under capital lease                           20.3             20.3
                                                       ---------        --------
       Total utility plant                              4,470.2          4,475.3
                                                       ---------        --------
Investments and Other Assets                              256.8            246.9
                                                       ---------        --------
Current Assets
    Cash and cash equivalents                              65.7            518.1
    Accounts receivable (less allowance
     for doubtful accounts of $5.5 million)
       Service                                            116.6            105.9
       Other                                               91.4            116.1
    Accrued unbilled revenue                               64.4             82.6
    Materials and supplies, at average cost                80.2             90.8
    Assets from commodity price risk
       management activities                               58.5             51.5
    Prepayments and other                                  61.7             51.5
                                                       ---------        --------
       Total current assets                               538.5          1,016.5
                                                       ---------        --------
Deferred Charges
    Transition period cost recovery                       457.3            457.3
    Other                                                 347.0            279.6
                                                       ---------        --------
       Total deferred charges                             804.3            736.9
                                                       ---------        --------
                                                       $6,069.8         $6,475.6
                                                       =========        ========

                                       3
<PAGE>

                              ILLINOVA CORPORATION
                           CONSOLIDATED BALANCE SHEETS AS RESTATED
          (See accompanying Notes to Consolidated Financial Statements)

                                                       MARCH 31,    DECEMBER 31,
                                                          1999          1998
CAPITAL AND LIABILITIES                              (Unaudited)     (Audited)
                                                       (Millions of Dollars)
Capitalization
    Common stock -
       No par value, 200,000,000 shares authorized;
       75,681,937 shares issued, stated at             $1,123.3         $1,123.2
    Less - Deferred compensation - ESOP                     5.3              6.8
    Retained deficit - accumulated since 1/1/99            (3.4)               -
    Accumulated other comprehensive income                  0.2                -
    Less - Capital stock expense                            7.3              7.3
    Less - 5,762,650 shares of common stock
       in treasury, at cost                               138.7            138.7
                                                       --------         --------
              Total common stock equity                   968.8            970.4

    Preferred stock of subsidiary                          52.9             57.1
    Company obligated mandatorily redeemable
       preferred stock of subsidiary                      194.5            199.0
    Long-term debt                                        175.7            176.1
    Long-term debt of subsidiary                        2,078.7          2,158.5
                                                       --------         --------
              Total capitalization                      3,470.6          3,561.1
                                                       --------         --------

Current Liabilities
    Accounts payable                                      216.4            256.5
    Notes payable                                         263.5            147.6
    Long-term debt and lease obligations
       of subsidiary maturing within one year             182.0            506.6
    Liabilities from commodity price
       risk management activities                         105.2             99.8
    Other                                                 170.6            203.8
                                                       --------         --------
              Total current liabilities                   937.7          1,214.3
                                                       --------         --------
Deferred Credits
    Accumulated deferred income taxes                     846.0            834.8
    Accumulated deferred investment tax credits            39.2             39.6
    Decommissioning liability                             574.2            567.4
    Other                                                 202.1            258.4
                                                       --------         --------
              Total deferred credits                    1,661.5          1,700.2
                                                       --------         --------
                                                       $6,069.8         $6,475.6
                                                       ========         ========

                                       4
<PAGE>


                              ILLINOVA CORPORATION
                        CONSOLIDATED STATEMENTS OF INCOME
          (See accompanying Notes to Consolidated Financial Statements)

                                                          THREE MONTHS ENDED
                                                               MARCH 31,
                                                         1999            1998
                                                             (Unaudited)
                                                     (Millions except per share)
Operating Revenues:
       Electric                                        $    255.2        $276.6
       Electric interchange                                  94.0          96.3
       Gas                                                  123.1         116.6
       Diversified enterprises                               76.1          85.9
                                                       ----------     ----------
          Total                                             548.4         575.4
                                                       ----------     ----------

Operating Expenses:
       Fuel for electric plants                              51.4          55.7
       Power purchased                                       51.7          97.1
       Gas purchased for resale                              72.5          66.0
       Diversified enterprises                               81.5          94.7
       Other operating expenses                             110.4          79.8
       Maintenance                                           41.3          29.0
       Depreciation & amortization                           44.5          50.7
       Amortization of regulatory asset                       1.5             -
       General taxes                                         29.9          38.7
                                                       ----------     ----------
          Total                                             484.7         511.7
                                                       ----------     ----------
Operating Income                                             63.7          63.7
                                                       ----------     ----------
Other Income and Deductions:
       Miscellaneous-net                                     10.9          (1.5)
       Equity earnings in affiliates                          0.5           5.5
                                                       ----------     ----------
          Total                                              11.4           4.0
                                                       ----------     ----------
Income Before Interest
       Charges and Income Taxes                              75.1          67.7
                                                       ----------     ----------
Interest Charges:
       Interest expense                                      43.1          36.6
       Allowance for borrowed funds
          used during construction                          (1.2)          (1.1)
       Preferred dividend
          requirements of subsidiary                          5.0           4.9
                                                       ----------     ----------
          Total                                              46.9          40.4
                                                       ----------     ----------
Income Before Income Taxes                                   28.2          27.3
                                                       ----------     ----------
Income Taxes                                                 11.3           4.3
                                                       ----------     ----------
Net Income                                                   16.9          23.0
       Carrying amount over
          consideration paid for redeemed
          preferred stock of subsidiary                       0.8             -
                                                       ----------     ----------
Net Income Applicable to
       Common Stock                                         $17.7         $23.0
                                                       ==========     ==========
Earnings per common share (basic
       and diluted)                                         $0.25         $0.32
Cash dividends declared per
       common share                                         $0.31         $0.31
Cash dividends paid per
       common share                                         $0.31         $0.31
Weighted average number of
       common shares outstanding
       during period                                   69,919,287    71,701,253

                                       5
<PAGE>
                                          ILLINOVA
                     CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
               (See accompanying Notes to Consolidated Financial Statements)

                                                          THREE MONTHS ENDED
                                                             MARCH 31,
                                                         1999           1998
                                                             (Unaudited)
                                                          (Millions of Dollars)

Net Income Applicable to Common Stock                      $17.7           $23.0
                                                           -----           -----

Other Comprehensive Income
     Foreign currency translation adjustments               (0.1)              -
     Unrealized gains on securities                          0.5               -
                                                           -----           -----
         Other comprehensive income, before tax              0.4               -
     Income taxes on other comprehensive income             (0.2)              -
                                                           -----           -----
     Other comprehensive income, net of tax                  0.2               -
                                                           -----           -----

Comprehensive Income                                       $17.9           $23.0
                                                           =====           =====

                                       6
<PAGE>

                             ILLINOVA CORPORATION
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
            (See accompanying Notes to Consolidated Financial Statements)

                                                           THREE MONTHS ENDED
                                                               MARCH 31,
                                                         1999            1998
                                                             (Unaudited)
                                                         (Millions of Dollars)

CASH FLOWS FROM OPERATING ACTIVITIES
     Net income                                             $16.9         $23.0
     Items not requiring cash, net                           54.2          44.4
     Changes in assets and liabilities                     (129.4)         62.0
                                                           -------        -----

     Net cash provided (used) by operating activities       (58.3)        129.4
                                                           -------       ------

CASH FLOWS FROM INVESTING ACTIVITIES
     Construction expenditures                              (37.1)        (47.8)
     Other investing activities                             (17.4)         (8.5)
                                                            ------        ------

     Net cash used in investing activities                  (54.5)        (56.3)
                                                           -------        ------

CASH FLOWS FROM FINANCING ACTIVITIES
     Dividends on common stock                              (21.7)        (22.2)
     Reissuance of common stock                                 -           0.7
     Redemptions -
          Short-term debt                                  (123.4)       (115.6)
          Long-term debt of subsidiary                     (345.8)            -
          Preferred stock of subsidiary                      (8.6)            -
     Issuances -
          Short-term debt                                   239.3           8.9
          Long-term debt                                        -          92.4
     Other financing activities                             (79.4)          0.3
                                                           -------        ------

     Net cash used in financing activities                 (339.6)        (35.5)
                                                           -------        ------

     NET CHANGE IN CASH AND CASH EQUIVALENTS               (452.4)         37.6
     CASH AND CASH EQUIVALENTS
        AT BEGINNING OF YEAR                                518.1          33.0
                                                           -------        ------

     CASH AND CASH EQUIVALENTS
        AT END OF PERIOD                                    $65.7         $70.6
                                                           =======        ======

                                       7
<PAGE>

                             ILLINOIS POWER COMPANY
                           CONSOLIDATED BALANCE SHEETS AS RESTATED
          (See accompanying Notes to Consolidated Financial Statements)

                                                        MARCH 31,   DECEMBER 31,
                                                          1999          1998
                                                       (Unaudited)   (Audited)
                                                         (Millions of Dollars)
ASSETS

Utility Plant
   Electric (includes construction work
       in progress of $139.4 million and
       $177.7 million, respectively)                      $5,496.0      $5,481.8
   Gas (includes construction work
       in progress of $14.8 million and
       $15.3 million, respectively)                          690.5         686.9
                                                          --------      --------
                                                           6,186.5       6,168.7
Less - Accumulated depreciation                            1,736.6       1,713.7
                                                          --------      --------
                                                           4,449.9       4,455.0
Nuclear fuel under capital lease                              20.3          20.3
                                                          --------      --------
     Total utility plant                                   4,470.2       4,475.3
                                                          --------      --------
Investments and Other Assets                                   3.2           2.6
                                                          --------      --------
Current Assets
   Cash and cash equivalents                                  49.3         504.5
   Accounts receivable (less allowance
    for doubtful accounts of $5.5 million)
     Service                                                 116.6         105.9
     Other                                                    29.2          32.5
   Accrued unbilled revenue                                   64.4          82.6
   Materials and supplies, at average cost                    79.0          90.4
   Assets from commodity price risk
     management activities                                    33.9          26.0
   Prepayments and other                                      49.7          42.8
                                                          --------      --------
     Total current assets                                    422.1         884.7
                                                          --------      --------
Deferred Charges
   Transition period cost recovery                           457.3         457.3
   Other                                                     350.5         284.2
                                                          --------      --------
     Total deferred charges                                  807.8         741.5
                                                          --------      --------
                                                          $5,703.3      $6,104.1
                                                          ========      ========

                                       8
<PAGE>

                                 ILLINOIS POWER COMPANY
                               CONSOLIDATED BALANCE SHEETS AS RESTATED
               (See accompanying Notes to Consolidated Financial Statements)

                                                        MARCH 31,   DECEMBER 31,
                                                          1999          1998
                                                       (Unaudited)    (Audited)
                                                         (Millions of Dollars)
CAPITAL AND LIABILITIES

Capitalization
    Common stock -
      No par value, 100,000,000 shares
      authorized; 75,643,937 shares issued,
      stated at                                           $1,186.0      $1,185.9
    Retained earnings - accumulated since 1/1/99              19.4           -
    Accumulated other comprehensive income                     0.2           -
    Less - Capital stock expense                               7.3           7.3
    Less - 12,751,724 shares of
      common stock in treasury, at cost                      286.4         286.4
                                                          --------      --------
           Total common stock equity                         911.9         892.2
    Preferred stock                                           52.9          57.1
    Company obligated mandatorily
      redeemable preferred stock                             194.5         199.0
    Long-term debt                                         2,078.7       2,158.5
                                                          --------      --------
           Total capitalization                            3,238.0       3,306.8
                                                          --------      --------

Current Liabilities
    Accounts payable                                         228.7         216.2
    Notes payable                                            197.5         147.6
  Long-term debt and lease obligations
      maturing within one year                               182.0         506.6
    Liabilities from commodity price
      risk management activities                              71.0          61.6
    Other                                                    108.9         150.5
                                                          --------      --------
           Total current liabilities                         788.1       1,082.5
                                                          --------      --------
Deferred Credits
    Accumulated deferred income taxes                        861.7         849.5
    Accumulated deferred investment tax credits               39.2          39.6
    Decommissioning liability                                574.2         567.4
    Other                                                    202.1         258.3
                                                          --------      --------
           Total deferred credits                          1,677.2       1,714.8
                                                          --------      --------
                                                          $5,703.3      $6,104.1
                                                          ========      ========

                                       9
<PAGE>

                                 ILLINOIS POWER COMPANY
                           CONSOLIDATED STATEMENTS OF INCOME
           (See accompanying Notes to Consolidated Financial Statements)

                                                            THREE MONTHS ENDED
                                                                 MARCH 31,
                                                            1999          1998
                                                               (Unaudited)
                                                          (Millions of Dollars)
Operating Revenues:
    Electric                                              $255.2        $276.6
    Electric interchange                                    94.0          96.3
    Gas                                                    123.1         116.6
                                                          ------        ------
       Total                                               472.3         489.5
                                                          ------        ------

Operating Expenses and Taxes:
    Fuel for electric plants                                51.4          55.7
    Power purchased                                         51.7          97.1
    Gas purchased for resale                                72.5          66.0
    Other operating expenses                               110.4          79.8
    Maintenance                                             41.3          29.0
    Depreciation & amortization                             44.5          50.7
    Amortization of regulatory asset                         1.5           -
    General taxes                                           29.9          38.7
    Income taxes                                            13.7          10.7
                                                          ------        ------
       Total                                               416.9         427.7
                                                          ------        ------
Operating Income                                            55.4          61.8
                                                          ------        ------
Other Income and Deductions, Net                             6.2           1.6
                                                          ------        ------
Income Before Interest Charges                              61.6          63.4
                                                          ------        ------

Interest Charges and Other:
    Interest expense                                        39.8          34.1
    Allowance for borrowed funds
       used during construction                            (1.2)          (1.1)
                                                          ------        ------
       Total                                                38.6          33.0
                                                          ------        ------

Net Income                                                  23.0          30.4
    Less-Preferred dividend
       requirements                                          5.0           4.9
    Plus - Carrying amount over
       consideration paid for
       redeemed preferred stock                              0.8            -
                                                          ------        ------
Net Income Applicable to
    Common Stock                                           $18.8        $25.5
                                                          ======        ======

                                       10
<PAGE>

                                 ILLINOIS POWER COMPANY
                      CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
               (See accompanying Notes to Consolidated Financial Statements)

                                                           THREE MONTHS ENDED
                                                                MARCH 31,
                                                            1999       1998
                                                              (Unaudited)
                                                          (Millions of Dollars)

Net Income Applicable to Common Stock                     $18.8      $25.5
                                                          -----      -----

Other Comprehensive Income
         Unrealized gains on securities                     0.4        -
         Income taxes on other comprehensive income        (0.2)       -
                                                          -----      -----
         Other comprehensive income, net of tax             0.2        -
                                                          -----      -----

Comprehensive Income                                      $19.0      $25.5
                                                          =====      =====

                                       11
<PAGE>

                             ILLINOIS POWER COMPANY
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
          (See accompanying Notes to Consolidated Financial Statements)

                                                            THREE MONTHS ENDED
                                                                  MARCH 31,
                                                            1999           1998
                                                                (Unaudited)
                                                          (Millions of Dollars)

CASH FLOWS FROM OPERATING ACTIVITIES
     Net income                                             $22.9         $30.4
     Items not requiring cash, net                           55.5          47.4
     Changes in assets and liabilities                     (105.6)         61.7
                                                          -------         -----

     Net cash provided (used) by operating activities       (27.2)        139.5
                                                          -------         -----

CASH FLOWS FROM INVESTING ACTIVITIES
     Construction expenditures                              (37.1)        (47.8)
     Other investing activities                              (2.7)           0.6
                                                          -------         ------

     Net cash used in investing activities                  (39.8)        (47.2)
                                                          -------         ------

CASH FLOWS FROM FINANCING ACTIVITIES
     Dividends on preferred and common stock                 (4.3)        (27.2)
     Redemptions -
          Short-term debt                                  (123.4)        (77.1)
          Long-term debt                                   (345.8)          -
          Preferred stock                                    (8.6)          -
     Issuances -
          Short-term debt                                   173.3           -
          Long-term debt                                      -            52.4
     Other financing activities                             (79.4)          -
                                                          -------         ------

     Net cash used in financing activities                 (388.2)        (51.9)
                                                          -------         ------

NET CHANGE IN CASH AND CASH EQUIVALENTS                    (455.2)         40.4
CASH AND CASH EQUIVALENTS
        AT BEGINNING OF YEAR                                504.5          17.8
                                                          -------         ------

CASH AND CASH EQUIVALENTS
        AT END OF PERIOD                                    $49.3         $58.2
                                                          =======         ======

                                       12
<PAGE>

                 ILLINOVA CORPORATION AND ILLINOIS POWER COMPANY
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

GENERAL

        Financial  statement note  disclosures,  normally  included in financial
statements prepared in conformity with generally accepted accounting principles,
have been omitted from this Form 10-Q pursuant to the Rules and  Regulations  of
the  Securities  and  Exchange  Commission  (SEC).  However,  in the  opinion of
Illinova Corporation (Illinova) and Illinois Power Company (IP), the disclosures
and information contained in this Form 10-Q are adequate and not misleading. See
the consolidated  financial  statements and the accompanying notes in Illinova's
1998 Annual  Report to  Shareholders,  (included  in the Proxy  Statement),  the
consolidated financial statements and the accompanying notes in IP's 1998 Annual
Report to Shareholders (included in the Information  Statement),  Illinova's and
IP's 1998 Form 10-K  filings to the SEC, and  Illinova's  and IP's 1998 Form 8-K
filings  to the SEC  for  information  relevant  to the  consolidated  financial
statements contained herein,  including information as to certain regulatory and
environmental matters and as to the significant accounting policies followed.

        In the opinion of Illinova,  the accompanying  unaudited March 31, 1999,
and audited December 31, 1998,  consolidated  financial  statements for Illinova
reflect all  adjustments  necessary to present fairly the  Consolidated  Balance
Sheets as of March 31, 1999, and December 31, 1998, the Consolidated  Statements
of  Income  for the  three  months  ended  March  31,  1999  and  1998,  and the
Consolidated  Statements of Cash Flows for the three months ended March 31, 1999
and 1998. In addition,  it is Illinova's and IP's opinion that the  accompanying
unaudited March 31, 1999, and audited December 31, 1998,  consolidated financial
statements  for IP reflect  all  adjustments  necessary  to  present  fairly the
Consolidated  Balance  Sheets as of March 31, 1999,  and December 31, 1998,  the
Consolidated  Statements of Income for the three months ended March 31, 1999 and
1998, and the  Consolidated  Statements of Cash Flows for the three months ended
March  31,  1999  and  1998.  Due  to  seasonal  and  other  factors  which  are
characteristic  of electric and gas utility  operations,  interim period results
are not necessarily indicative of results to be expected for the year.

        The consolidated  financial  statements of Illinova include the accounts
of Illinova,  IP, Illinova Generating Company (IGC),  Illinova Insurance Company
(IIC), Illinova Energy Partners,  Inc. (IEP), and Illinova Business Enterprises,
Inc. (IBE). All significant  intercompany  balances and  transactions  have been
eliminated from the  consolidated  financial  statements.  All  transactions for
Illinova's  unregulated   subsidiaries  are  included  in  the  sections  titled
"Diversified  Enterprises," "Interest Charges," "Income Taxes" and "Other Income
and Deductions" in Illinova's Consolidated Statements of Income.

        The  consolidated  financial  statements  of IP include the  accounts of
Illinois Power Capital, L.P., Illinois Power Financing I (IPFI),  Illinois Power
Securitization  Limited  Liability  Company,  and Illinois Power Special Purpose
Trust (IPSPT). All significant  intercompany balances and transactions have been


                                       13
<PAGE>


eliminated from the consolidated financial statements. All non-utility operating
transactions  are included in the section  titled "Other Income and  Deductions,
Net" in IP's Consolidated Statements of Income.


REGULATORY AND LEGAL MATTERS

   OPEN ACCESS AND COMPETITION

         The Illinois  Customer Choice and Rate Relief Act of 1997, P.A. 90-561,
Illinois  electric utility  restructuring  legislation,  was enacted in December
1997. P.A. 90-561 gives IP's residential customers a 15 percent decrease in base
electric rates  beginning  August 1, 1998, and an additional 5 percent  decrease
effective  May 1,  2002.  The rate  decreases  result in revenue  reductions  of
approximately   $35  million  in  1998,  and  expected  revenue   reductions  of
approximately $70 million in each of the years 1999 through 2001,  approximately
$90 million in 2002, and  approximately  $100 million in 2003,  based on current
consumption.

         Under P.A. 90-561,  customers with demand greater than 4 MW at a single
site and  customers  with at least 10 sites which  aggregate  at least 9.5 MW in
total demand will be free to choose their electric generation suppliers ("direct
access") starting October 1999. Direct access for the remaining  non-residential
customers  will occur in two phases:  customers  representing  one-third  of the
remaining  load in the  non-residential  class in  October  1999  and  customers
representing  the entire  remaining  non-residential  load on December 31, 2000.
Direct  access will be available to all  residential  customers in May 2002.  IP
remains obligated to serve all customers who continue to take service from IP at
tariff  rates and  remains  obligated  to  provide  delivery  service  to all at
regulated rates. Rates for delivery services for non-residential  customers will
be established in 1999, in proceedings  mandated by P.A. 90-561.  The transition
charges  departing  customers  must  pay to IP  are  not  designed  to  hold  IP
completely harmless from resulting revenue loss because of the mitigation factor
described  below.  IP will be able to estimate  the  revenue  impact of customer
choice more  accurately  when the various  components of the transition  charges
calculation have been established.
         Although the specified residential rate reductions and the introduction
of direct access will lead to lower electric  service  revenues,  P.A. 90-561 is
designed to protect the  financial  integrity  of  electric  utilities  in three
principal ways:

1)   Departing customers are obligated to pay transition  charges,  based on the
     utility's  lost  revenue from that  customer.  The  transition  charges are
     applicable  through  2006 and can be extended two  additional  years by the
     Illinois Commerce  Commission (ICC). The transition  charges are calculated
     by subtracting  from a customer's fully bundled rate an amount equal to: a)
     delivery charges the utility will continue to receive from the customer, b)
     the market value of the freed-up energy, and c) a mitigation factor,  which
     is the higher of a fixed  rate per kwh or a  percentage  of the  customer's
     bundled base rate. The mitigation  factor  increases  during the transition
     period and is designed to provide incentive for management to continue cost
     reduction efforts and generate new sources of revenue;

                                       14
<PAGE>

2)   Utilities are provided the opportunity to lower their financing and capital
     costs through the issuance of "securitized" bonds, also called transitional
     funding instruments; and

3)   Utilities are permitted to seek rate relief in the event that the change in
     law leads to their return on equity falling below a specified minimum based
     on a prescribed test. Utilities are also subject to an "over-earnings" test
     which requires them, in effect, to share with customers  earnings in excess
     of specified levels.


         The extent to which revenues are affected by P.A. 90-561 will depend on
a number of factors  including  future  market  prices for  wholesale and retail
energy,  and load growth and demand levels in the current IP service  territory,
and success in marketing to customers outside IP's service territory. The impact
on net income will depend on, among other things,  the amount of revenues earned
and the cost of doing business.


         ACCOUNTING MATTERS


         Prior to the  enactment of P.A.  90-561,  IP prepared its  consolidated
financial  statements in accordance with FAS 71,  "Accounting for the Effects of
Certain Types of  Regulation."  Because P.A.  90-561  provides for  market-based
pricing of electric generation services,  IP discontinued  application of FAS 71
for its generating segment in December 1997, when P.A. 90-561 was enacted.

         In December 1998,  Illinova's  and IP's Boards of Directors  decided to
exit the nuclear  portion of the  business by either sale or shutdown of Clinton
Power Station (Clinton).  FAS 121,  "Accounting for the Impairment of Long-Lived
Assets  and  for  Long-Lived  Assets  to be  Disposed  Of,"  requires  that  all
long-lived  assets for which  management  has committed to a plan of disposal be
reported  at the lower of  carrying  amount or fair  value  less  costs to sell.
Consequently, IP wrote off the value of Clinton and accrued Clinton-related exit
costs, which resulted in a $1,523.7 million, net of income taxes, charge against
retained earnings and an accumulated deficit in Illinova's consolidated retained
earnings balance of $1,616.0 million.

         Illinova's  and IP's Boards of Directors also chose in December 1998 to
effect  a  quasi-reorganization.   The  quasi-reorganization  is  an  accounting
procedure  that  eliminated  the  accumulated  deficit in retained  earnings and
permitted  the  Company  to  proceed  on much the  same  basis as if it had been
legally  reorganized by restating the Company's  assets and liabilities to their
fair values,  with the net amount of these adjustments added to or deducted from
the deficit. The remaining deficit in retained earnings was then eliminated by a
transfer  from paid-in  capital,  giving the Company a "fresh start" with a zero
balance in retained earnings.  The  quasi-reorganization  eliminated  Illinova's
consolidated accumulated deficit in retained earnings of $1,616.0 million.

         Implementation of a  quasi-reorganization  required the adoption of any
accounting  standards  that  had not yet been  adopted  because  their  required
implementation date had not occurred.  All applicable  accounting standards were
adopted as of December 1998. The standards adopted included FAS 133, "Accounting
for  Derivative   Instruments  and  Hedging   Activities,"   EITF  Issue  98-10,

                                       15
<PAGE>

"Accounting  for  Contracts  Involved  in  Energy  Trading  and Risk  Management
Activities",  SOP 98-1, "Accounting for the Costs of Computer Software Developed
or Obtained for Internal Use", and SOP 98-5, "Reporting on the Costs of Start-Up
Activities."


        Illinova  and IP  recognized  other  comprehensive  income for the three
months ended March 31, 1999,  as required by FAS 130,  "Reporting  Comprehensive
Income."  FAS  130   established   standards   for   reporting  and  display  of
comprehensive  income  and  its  components  in a full  set  of  general-purpose
financial statements.  Illinova and IP have adopted the two-statement  approach,
as provided  for by FAS 130 and present a separate  statement  of  comprehensive
income in addition to the income  statement.  Items included in Illinova's other
comprehensive  income  for the  three  months  ended  March  31,  1999,  include
unrealized  gains on  securities,  foreign  currency  translations,  and related
income taxes. IP's March 31, 1999, other  comprehensive  income was comprised of
unrealized  gains on securities held in IP's nuclear  decommissioning  trust and
related income taxes. There were no items reported as other comprehensive income
in 1998.


        MANUFACTURED GAS PLANT SITES

        IP's  estimated   liability  for   Manufactured  Gas  Plant  (MGP)  site
remediation is $61 million.  This amount represents IP's current estimate of the
costs it will incur to remediate  the 24 MGP sites for which it is  responsible.
Because of the  unknown  and  unique  characteristics  at each  site,  IP cannot
currently determine its ultimate liability for remediation of the sites.

         In October  1995,  to offset the burden  imposed on its  customers,  IP
initiated  litigation against a number of insurance  carriers.  As of June 1998,
settlements or settlements in principle have been reached with all thirty of the
carriers.  Settlement  proceeds  recovered  from  the  carriers  will  offset  a
significant  portion  of the MGP  remediation  costs  and  will be  credited  to
customers  through  the  tariff  rider  mechanism  which the ICC has  previously
approved.  Cleanup costs in excess of insurance proceeds will be fully recovered
from IP's transmission and distribution customers.


TREASURY STOCK

        Through March 31, 1999, IP has purchased a total of 12,751,724 shares of
its common stock from Illinova,  all of which are held as treasury stock and are
deducted from common equity at the cost of the shares purchased. No shares of IP
common  stock were  purchased  during  the first  three  months of 1999.  At the
October 14, 1998, Illinova Board of Director's  meeting,  the Board approved the
repurchase of up to 12 million shares of Illinova common stock over the next six
to twelve months in conjunction with IP's issuance of securitized debt, although
no additional  repurchases are planned,  at present.  For more information,  see
"Liquidity and Capital  Resources" of  "Management's  Discussion and Analysis of
Financial Condition and Results of Operations" on page 28 of this report.

                                       16
<PAGE>

FINANCIAL AND OTHER DERIVATIVE INSTRUMENTS

        Trading  Activities-  Illinova,  through its  subsidiaries,  IP and IEP,
engages in the brokering and  marketing of  electricity  and natural gas. IP and
IEP  use a  variety  of  instruments,  including  fixed-price  swap  agreements,
variable-price  swap  agreements,  exchange-traded  energy  futures  and options
contracts, and over-the-counter forwards, swaps, and options.

        As of December 31,  1998,  Illinova  and its  subsidiaries  adopted EITF
98-10.  For more  information  regarding  Illinova's  adoption of new accounting
pronouncements,  see  Accounting  Matters  of  this  section  on page 15 of this
report. At March 31, 1999, IP's and IEP's derivative assets and liabilities were
recorded in the Consolidated  Balance Sheets at fair value with unrealized gains
and losses shown net in the Consolidated Statements of Income. IP and IEP record
realized  gains and losses as  components  of operating  revenues and  operating
expenses in the Consolidated Statements of Income.

        The notional quantities and average terms of commodity  instruments held
for trading purposes at March 31, 1999, are presented below:

                         Volume-Fixed       Volume-Fixed          Average
                         Price Payor       Price Receiver           Term
Electricity
   IP                       2,300 MW           1,950 MW            1 year
   IEP                     11,388 MW          11,053 MW            1 year
Gas
   IEP (in thousands)       2,350 MMBtu        2,350 MMBtu         1 year

        All  notional  amounts  reflect  the volume of  transactions  but do not
represent the dollar amounts or actual megawatts exchanged by the parties to the
contracts.  Accordingly,  notional amounts do not accurately  measure Illinova's
exposure to market or credit risk.

        The  estimated  fair value of  commodity  instruments  held for  trading
purposes at March 31, 1999, are presented below:

                                            Fair Value          Fair Value
      (Millions of dollars)                   Assets            Liabilities

Electricity
   IP                                          $27.2              $52.1
   IEP                                          24.6               34.0
                                                ----               ----
                                                51.8               86.1

Gas
   IEP                                           2.2                1.2
                                                 ---                ---
                                               $54.0              $87.3

        The fair value was  estimated  using  quoted  prices and  indices  where
available and the liquidity of the market for the instrument was considered. The
fair values are subject to volatility based on changing market conditions.

                                       17
<PAGE>

        The weighted average term of the trading portfolio,  based on volume, is
less than one year.  The  maximum  and average  terms  disclosed  herein are not
indicative of likely future cash flows as these positions may be modified by new
transactions in the trading portfolio at any time in response to changing market
conditions, market liquidity, and Illinova's risk management portfolio needs and
strategies.  Terms  regarding  cash  settlements  of these  contracts  vary with
respect to the actual timing of cash receipts and payments.

Non-Trading Activities- To reduce the risk from market fluctuations in the price
of electricity and related  transmission,  Illinova,  through its subsidiary IP,
enters into forward transactions, swaps, and options (energy derivatives). These
instruments are used to hedge expected  purchases,  sales,  and  transmission of
electricity  (a portion of which are firm  commitments  at the  inception of the
hedge).  The weighted  average  maturity of these  instruments  is less than one
year.

        Periodically,   IP  has  used  interest  rate  derivatives  (principally
interest  rate swaps and caps) to adjust the portion of its  overall  borrowings
subject to interest rate risk. As of March 31, 1999, there were no interest rate
derivatives outstanding.

        In order to hedge  expected  purchases  of emission  allowances,  IP has
entered into swap  agreements  and written put options  with other  utilities to
mitigate the risk from market  fluctuations in the price of the  allowances.  At
March 31, 1999, the notional amount of two emission  allowance swaps was 126,925
units,  with a  recorded  liability  of $15.6  million,  based on fair  value at
delivery date. The maximum  maturity of the swap  agreements is 10 years.  These
agreements do not fall under the scope of FAS 133. Due to the remote probability
of exercise, three put options written by IP are considered immaterial.

        As of December 31, 1998, Illinova and its subsidiaries  adopted FAS 133.
IP's  derivative   assets  and   liabilities  are  currently   recorded  on  the
Consolidated Balance Sheets at fair value with unrealized gains and losses shown
net in the Consolidated  Statements of Income. Hedge accounting was not applied.
In the future, if hedge accounting is applied,  unrealized gains and losses will
be shown as a component  of  Comprehensive  Income in the equity  section of the
Consolidated  Balance Sheets. IP records realized gains and losses as components
of operating revenues and operating  expenses in the Consolidated  Statements of
Income.  As of March 31,  1999,  all  non-trading  derivative  instruments  were
accounted for using mark-to-market accounting.

        The  notional  quantities  and the  average  term of  energy  derivative
commodity  instruments  held for other than trading  purposes at March 31, 1999,
follows:

                             Volume-Fixed       Volume-Fixed       Average
                             Price Payor       Price Receiver        Term
Electricity
   IP                           900 MW             300 MW            1 year

        In addition to the fixed-price notional volumes above, IP recorded a $25
million  liability  in 1998  for  two  "commodity  for  commodity"  energy  swap
agreements  totaling 350 MW which are not  considered  derivatives as defined by

                                       18
<PAGE>

FAS 133. As of March 31, 1999,  the swap  liability  decreased to $23.5 million.
The decrease in the liability is due to IP's  commencing  repayment of one power
swap in January 1999.

        The  notional  amount  is  intended  to be  indicative  of the  level of
activity in such  derivatives,  although  the amounts at risk are  significantly
smaller because changes in the market value of these  derivatives  generally are
offset  by  changes  in  the  value  associated  with  the  underlying  physical
transactions or in other derivatives.  When energy derivatives are closed out in
advance of the  underlying  commitment or  anticipated  transaction,  the market
value changes may not be offset  because price  movement  correlation  ceases to
exist when the positions are closed.

        The estimated fair values of energy  derivative  commodity  instruments,
held for non-trading purposes at March 31, 1999, are presented below:

                                      Fair Value              Fair Value
     (Millions of dollars)              Assets                Liabilities

Electricity
   IP                                    $6.0                    $18.6

        The fair value was  estimated  using  quoted  prices and  indices  where
available,  and considering the liquidity of the market for the instrument.  The
fair  values are subject to  significant  volatility  based on  changing  market
conditions.

        The average maturity and fair values discussed above are not necessarily
indicative of likely future cash flows.  These  positions may be modified by new
offsetting transactions at any time in response to changing generation forecast,
market conditions,  market liquidity,  and Illinova's risk management  portfolio
needs and strategies.  Terms regarding cash  settlements of these contracts vary
with respect to the actual timing of cash receipts and payments.


ILLINOVA - SEGMENTS OF BUSINESS

In 1997, the FASB issued FAS 131,  "Disclosures  about Segments of an Enterprise
and Related Information." This statement superseded FAS 14, "Financial Reporting
for  Segments of a Business  Enterprise,"  and  established  new  standards  for
defining a company's  segments and  disclosing  information  about them. The new
statement  requires  that  segments  be  based  on the  internal  structure  and
reporting of a company's operations.

The Illinova enterprise comprises six separate corporations and eight functional
business  groups.  The business  groups and their  principal  activities  are as
follows:

o    IP Customer Service Business Group - transmission,  distribution,  and sale
     of electric energy; distribution,  transportation,  and sale of natural gas
     in Illinois.
                                       19
<PAGE>

o    IP Wholesale Energy Business Group - fossil-fueled  electric  generation in
     Illinois,  wholesale electricity transactions throughout the United States,
     and dispatching activities.
o    IP Nuclear Generation  Business Group - nuclear-fueled  electric generation
     in Illinois.
o    Illinova   Energy   Partners   -   energy-related   products  and  services
     throughout the United States and Canada.
o    Illinova Generating Company   -  independent power  projects throughout the
     world.
o    IP  Financial  Business  Group  -  financial  support  functions  such   as
     accounting, finance, corporate performance,  audit and compliance, investor
     relations,  legal,  corporate development, regulatory, risk management, and
     tax services.
o    IP  Support  Services  Business  Group  -  specialized  support  functions,
     including information technology, human resources, environmental resources,
     purchasing and materials management, and public affairs.
o    Corporate - Illinova  Corporation,  Illinova Insurance Company and Illinova
     Business  Enterprises - holding company;  insurance and risk products;  and
     miscellaneous business lines.

Of the above-listed  segments,  the IP Financial  Business Group, the IP Support
Services  Business Group,  and Corporate did not  individually  meet the minimum
threshold  requirements  for separate  disclosure  and are combined in the Other
category.

In 1998,  three  measures were used to judge segment  performance:  contribution
margin,  cash flow,  and return on net invested  capital.  In 1999, two measures
were used to judge  segment  performance:  contribution  margin  and cash  flow;
return on net invested capital is no longer a corporate measure in 1999.

                                       20
<PAGE>
<TABLE>
<CAPTION>

Illinova Corporation
Three Months Ended March 31, 1999                        (Millions of Dollars)

                                                              Illinova
                                   Customer  Wholesale         Energy   Illinova  Other  Consoli-
                                   Service    Energy  Nuclear Partners  Generating        dated
1999
<S>                                  <C>        <C>       <C>     <C>        <C>     <C>   <C>
Revenues from external customers     376.7       94.1     1.5        -         -      -    472.3
Diversified enterprise revenue           -          -       -     46.4       28.3   1.4     76.1
Intersegment revenue (1)                 -      135.9    (0.7)       -          -     -    135.2
                                     -----------------------------------------------------------
   Total Revenue                     376.7      230.0     0.8     46.4       28.3    1.4   683.6
Depreciation and amortization
   expense                            18.5       25.6     2.0        -          -   (0.1)   46.0
Other operating expenses (1)         275.3      126.6    89.4     49.3       30.1    3.2   573.9
                                     -----------------------------------------------------------
   Operating income (loss)            82.9       77.8   (90.6)    (2.9)      (1.8)  (1.7)   63.7
Interest expense                      19.3       19.9     0.7        -          -    3.2    43.1
AFUDC                                 (0.4)      (0.8)      -        -          -    0.0    (1.2)
                                     -----------------------------------------------------------
   Net income (loss) before taxes     64.0       58.7   (91.3)    (2.9)      (1.8)  (4.9)   21.8
Income tax expense (benefit)          24.4       22.3   (35.7)    (0.7)       1.7   (0.7)   11.3
Miscellaneous - net                      -        0.1    (0.5)       -       (6.2)  (1.2)   (7.8)
Equity earnings in subsidiaries          -          -       -     (1.0)       0.4    0.1    (0.5)
Interest revenue                         -          -    (1.1)       -          -   (2.0)   (3.1)
                                     -----------------------------------------------------------
   Net income (loss) after taxes      36.7       36.3   (54.0)    (1.2)       2.3   (1.1)   21.9
Preferred dividend requirement and
   carrying amount over consideration
   paid for redeemed preferred stock   2.9        3.0    (0.9)       -          -   (0.8)    4.2
                                      ----------------------------------------------------------
Net income (loss) available
   to common                          36.7       33.3   (53.5)    (1.2)       2.3   (0.3)   17.7
- -----------------------------------------------------------------------------------------------------------------------------------
Other information -
   Total assets (3)                2,297.3    3,121.8   198.5     63.3      239.7  149.2 6,069.8
   Subsidiary's investment in
      equity method investees            -          -       -      9.5      188.5      -   198.0
   Total expenditures for additions
      to long-lived assets            22.9       14.5       -        -          -    0.9    38.3
- -----------------------------------------------------------------------------------------------------------------------------------
Corporate Measures -
   Contribution margin (4)            50.0       46.5   (53.4)    (1.2)       2.3    0.9    45.3
   Cash flow (5)                      42.1      (87.6) (106.3)    (1.7)      12.5   51.6   (89.4)
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)   Intersegment revenue priced at 2.9 cents per kwh delivered.
      Intersegment expense is reflected in other operating expenses for
      Customer Service.
(2)   Net Income (loss) before Clinton impairment loss.
(3)   Primary  assets for  Nuclear  include  decommissioning  assets,  shared
      general and intangible plant and nuclear fuel.
(4)   Contribution  margin  represented by net income before  financing costs
      (net-of-tax) and preferred dividend requirement.
(5)   Cash flow before financing activities.

                                       21
<PAGE>
<TABLE>
<CAPTION>

Illinova Corporation
Three Months Ended March 31, 1998                      (Millions of Dollars)

                                                              Illinova
                                   Customer  Wholesale         Energy   Illinova  Other  Consoli-
                                   Service    Energy  Nuclear Partners  Generating        dated
1998
<S>                                  <C>        <C>       <C>     <C>        <C>    <C>    <C>
Revenues from external customers     391.6       96.3     1.6        -         -      -    489.5
Diversified enterprise revenue           -          -       -     84.9        0.7   0.3     85.9
Intersegment revenue (1)                 -      111.8    (0.6)       -          -     -    111.2
                                     ------------------------------------------------------------
   Total Revenue                     391.6      208.1     1.0     84.9       0.7    0.3    686.6
Depreciation and amortization
   expense                            16.9        7.4    24.8        -          -   1.6     50.7
Other operating expenses (1)         244.7      150.7    84.0     89.8        4.0  (1.0)   572.2
                                     ------------------------------------------------------------
   Operating income (loss)           130.0       50.0  (107.8)    (4.9)      (3.3)  (0.3)   63.7
Interest expense                      17.1        5.7    21.5        -          -   (7.7)   36.6
AFUDC                                 (0.3)      (0.4)   (0.4)       -          -      -    (1.1)
                                     ------------------------------------------------------------
   Net income (loss) before taxes    113.2       44.7  (128.9)    (4.9)      (3.3)   7.4    28.2
Income tax expense (benefit)          46.4       16.7   (55.3)    (1.1)      (0.7)  (1.7)    4.3
Miscellaneous - net                      -        1.8       -     (0.1)         -   (0.2)    1.5
Equity earnings in subsidiaries          -          -       -     (2.0)      (3.5)     -    (5.5)
Interest revenue                         -          -       -        -          -      -       -
                                     ------------------------------------------------------------
   Net income (loss) after taxes      66.8       26.2   (73.6)    (1.7)       0.9    9.3    27.9
Preferred dividend requirement and
   carrying amount over consideration
   paid for redeemed preferred stock   1.8        0.7     2.5        -          -   (0.1)    4.9
                                      ----------------------------------------------------------
Net income (loss) available
   to common                          65.0       25.5   (76.1)    (1.7)       0.9    9.4    23.0
- -----------------------------------------------------------------------------------------------------------------------------------
Other information -
   Total assets                    1,766.9      717.1  2,772.3     56.4     174.6  131.5 5,618.8
   Subsidiary's investment in
      equity method investees            -          -       -      12.4     165.4      -   117.8
   Total expenditures for additions
      to long-lived assets            30.2       10.2     7.2        -          -    1.3    48.9
- -----------------------------------------------------------------------------------------------------------------------------------
Corporate Measures -
   Contribution margin (2)            75.6       28.1   (61.2)    (1.7)       0.9    5.0    46.7
   Cash flow (3)                      73.2       43.2   (81.6)     2.1        3.9   42.1    82.9
- -----------------------------------------------------------------------------------------------------------------------------------
Return on net invested capital (4)    5.9%       6.0%     N/A      5.2%      0.5%   N/A     1.3%
</TABLE>

(1)  Intersegment revenue priced at 2.5 cents per kwh delivered.
     Intersegment expense is reflected in other operating  expenses for
     Customer Service. Nuclear  reflects a  replacement power expense for the
     increment of market price over the intersegment price.
(2)  Contribution  margin  represented by net income before  financing costs
     (net-of-tax) and preferred dividend requirement.
(3)  Cash flow before financing activities.
(4)  Return on net invested capital calculated as contribution  margin divided
     by net invested capital.

                                       22
<PAGE>

GEOGRAPHIC INFORMATION

(Millions of dollars)
- --------------------------------------------------------------------------------
Quarter ended March 31,                     1999        1998
- --------------------------------------------------------------------------------
Revenues: (1)
     United States                       $544.2       $575.4
     Foreign countries - seven              4.2            0
                                         ------       ------
                                         $548.4       $575.2
                                         ======       ======


(Millions of dollars)
- --------------------------------------------------------------------------------
March 31,                                  1999        1998
- --------------------------------------------------------------------------------
Long-lived assets: (2)
     United States                       $4,525.5    $4,597.4
     Foreign countries - nine               157.1       124.8
                                         --------    --------
                                         $4,682.6    $4,722.2
                                         ========    ========

(1) Revenues are attributed to geographic regions based on location of customer.
(2) Long-lived assets include plant, equipment, and investments in subsidiaries.


IP - SEGMENTS OF BUSINESS

IP comprises  five  business  groups.  The business  groups and their  principal
services are as follows:

o    IP Customer Service Business Group - transmission,  distribution,  and sale
     of electric energy; distribution,  transportation,  and sale of natural gas
     in Illinois.
o    IP Wholesale Energy Business Group - fossil-fueled  electric  generation in
     Illinois,  wholesale electricity transactions throughout the United States,
     and dispatching activities.
o    IP Nuclear Generation  Business Group - nuclear-fueled  electric generation
     in Illinois.
o    IP Financial  Business Group - financial  support functions such as
     accounting, finance, corporate performance, audit and compliance, investor
     relations,  legal,  corporate development, regulatory, risk management, and
     tax services.
o    IP  Support  Services  Business  Group  -  specialized  support  functions,
     including information technology, human resources, environmental resources,
     purchasing and materials management, and public affairs.

Of the above-listed segments, the IP Financial Business Group and the IP Support
Services  Business  Group  did  not  individually  meet  the  minimum  threshold
requirements for separate disclosure and are combined in the Other category.

                                       23
<PAGE>

In 1998,  three  measures were used to judge segment  performance:  contribution
margin,  cash flow,  and return on net invested  capital.  In 1999, two measures
were used to judge  segment  performance;  contribution  margin  and cash  flow;
return on net invested capital is no longer a corporate measure in 1999.
<TABLE>
<CAPTION>

Illinois Power
Three Months Ended March 31, 1999

                                                          Customer       Wholesale                                   Total
1999                                                      Service         Energy        Nuclear        Other        Company
<S>                                                          <C>             <C>            <C>           <C>          <C>
Revenues from external customers                               $376.7           $94.1         $1.5           $ -         $472.3
Intersegment revenue (1)                                            -           135.9        (0.7)             -          135.2
                                                       -------------------------------------------------------------------------
  Total Revenue                                                 376.7           230.0          0.8             -          607.5
Depreciation and amortization expense                            18.5            25.6          2.0         (0.1)           46.0
Other operating expenses (1)                                    275.3           126.6         89.4           1.1          492.4
                                                       -------------------------------------------------------------------------
  Operating income (loss)                                        82.9            77.8       (90.6)         (1.0)           69.1
Interest expense                                                 19.3            19.9          0.7         (0.1)           39.8
AFUDC                                                           (0.4)           (0.8)            -           0.0          (1.2)
                                                       -------------------------------------------------------------------------
  Net income (loss) before taxes                                 64.0            58.7       (91.3)         (0.9)           30.5
Income tax expense (benefit)                                     24.4            22.3       (35.7)           0.6           11.6
Miscellaneous-net                                                   -             0.1        (0.5)         (0.4)          (0.8)
Interest revenue                                                    -               -        (1.1)         (2.2)          (3.3)
                                                       -------------------------------------------------------------------------
  Net income (loss) after taxes                                  39.6            36.3       (54.0)           1.1           23.0
Preferred dividend requirement and
  carrying amount over consideration
  paid for redeemed preferred stock                               2.9             3.0        (0.9)         (0.8)            4.2
                                                       -------------------------------------------------------------------------
Net income (loss) available to common                          $ 36.7          $ 33.3     $ (53.1)          $1.9         $ 18.8
- --------------------------------------------------------------------------------------------------------------------------------
Other information -
  Total assets (2)                                           $2,297.3        $3,121.8       $198.5        $ 34.4       $5,652.0
  Total expenditures for additions to long-lived
    assets                                                       22.9            14.5            -           0.9           38.3
Corporate Measures -
  Contribution margin (3)                                      $ 50.0          $ 46.7     $ (53.4)          $1.1         $ 44.4
  Cash flow (4)                                                  42.1          (87.6)      (106.3)          81.4         (70.4)
- --------------------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)   Intersegment  revenue  priced  at 2.9 cents  per kwh  delivered  for 1999.
      Intersegment expense is reflected in other operating expenses for Customer
      Service.
(2)   Primary assets for Nuclear include  decommissioning assets, shared general
      and intangible plant and nuclear fuel.
(3)   Contribution  margin  represented  by net income  before  financing  costs
      (net-of-tax) and preferred dividend requirement.
(4)   Cash flow before financing activities.

                                       24
<PAGE>
<TABLE>
<CAPTION>

Illinois Power
Three Months Ended March 31, 1998

                                                              Customer       Wholesale                                   Total
1998                                                          Service         Energy        Nuclear        Other        Company
<S>                                                          <C>              <C>         <C>             <C>          <C>
Revenues from external customers                               $391.6           $96.3        $ 1.6           $ -         $489.5
Intersegment revenue (1)                                            -           111.8        (0.6)             -          111.2
                                                       -------------------------------------------------------------------------
  Total Revenue                                                 391.6           208.1          1.0             -          600.7
Depreciation and amortization expense                            16.9             7.4         24.8           1.6           50.7
Other operating expenses (1)                                    244.7           150.7         84.0         (1.9)          477.5
                                                       -------------------------------------------------------------------------
  Operating income (loss)                                       130.0            50.0      (107.8)           0.3           72.5
Interest expense                                                 17.1             5.7         21.5        (10.2)           34.1
AFUDC                                                           (0.3)           (0.4)        (0.4)             -          (1.1)
                                                       -------------------------------------------------------------------------
  Net income (loss) before taxes                                113.2            44.7      (128.9)          10.5           39.5
Income tax expense (benefit)                                     46.4            16.7       (55.3)         (0.6)            7.2
Miscellaneous-net                                                   -             1.8            -           0.3            2.1
Interest revenue                                                    -               -            -         (0.2)          (0.2)
                                                       -------------------------------------------------------------------------
  Net income (loss) after taxes                                  66.8            26.2       (73.6)          11.0           30.4
Preferred dividend requirement                                    1.8             0.7          2.5         (0.1)            4.9
                                                       -------------------------------------------------------------------------
Net income (loss) available to common                          $ 65.0           $25.5     $ (76.1)        $ 11.1         $ 25.5
- --------------------------------------------------------------------------------------------------------------------------------
Other information -
  Total assets                                               $1,766.9         $ 717.1     $2,772.3        $ 84.4       $5,340.7
  Total expenditures for additions to long-lived
   assets long-lived assets                                    $ 30.2           $10.2        $ 7.2         $ 1.3         $ 48.9

- --------------------------------------------------------------------------------------------------------------------------------
Corporate Measures -
  Contribution margin (2)                                      $ 75.6           $28.1     $ (61.2)         $ 5.1         $ 47.6
  Cash flow (3)                                                  73.2            43.2       (81.6)          31.3           66.1
  Return on net invested capital (4)                             5.9%            6.0%          N/A           N/A           1.3%
- --------------------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)   Intersegment  revenue  priced  at 2.5 cents  per kwh  delivered  for 1998.
      Intersegment expense is reflected in other operating expenses for Customer
      Service. Nuclear reflects a replacement power expense for the increment of
      market price over the intersegment price for 1998.
(2)   Contribution  margin  represented  by net income  before  financing  costs
      (net-of-tax) and preferred dividend requirement.
(3)   Cash flow before financing activities.
(4)   Return on net invested capital calculated as contribution  margin divided
      by net invested capital.

                                       25
<PAGE>

GEOGRAPHIC INFORMATION

(Millions of dollars)
- --------------------------------------------------------------------------------
Quarter ended March 31,                     1999        1998
- --------------------------------------------------------------------------------
Revenues: (1)
     United States                       $472.3       $489.5
                                         ======       ======

(Millions of dollars)
- --------------------------------------------------------------------------------
March 31,                                  1999        1998
- --------------------------------------------------------------------------------
Long-lived assets: (2)
     United States                       $4,436.1    $4,536.5
                                         ========    ========

(1) Revenues are attributed to geographic regions based on location of customer.
(2) Long-lived assets include plant, equipment, and investments in subsidiaries.

RESTATEMENT OF THE CONSOLIDATED FINANCIAL STATEMENTS AS OF MARCH 31, 1999 AND AS
OF DECEMBER 31, 1998

In  February  2000,  Illinova  and  IP  restated  their  consolidated  financial
statements  for the year ended  December  31,  1998 to reflect a revision to the
initial  estimate of the  "Transition  period cost  recovery"  regulatory  asset
established in December 1998 coincident with the impairment of the Clinton Power
Station.  The  effect  of  this  revision  was to  decrease  the  amount  of the
regulatory asset at December 31, 1998, and correspondingly  increase the related
impairment charge by $325.7 million ($196.5 million net of taxes). The impact of
this   revision   on   the   consolidated    financial    statements    follows:

<TABLE>

- ------------------------------------------------------------------------------------------
                                      March 31, 1999               December 31, 1998
- -------------------------------------------------------------------------------------------
                                 As Previously   As Restated    As Previously   As Restated
                                    Reported                       Reported
- -------------------------------------------------------------------------------------------
                                     (Millions of Dollars)          (Millions of Dollars)
        <S>                        <C>              <C>             <C>           <C>
Illinova Corporation
Common stock-No par value       $1,319.8          $1,123.3       $1,319.7       $1,123.2

Illinois Power Company
Common stock-No par value       $1,382.5          $1,186.0       $1,382.4       $1,185.9
- -------------------------------------------------------------------------------------------
</TABLE>
As a result of the quasi-reorganization, there was no effect of this revision on
"Retained Earnings." For more information, see "Accounting Matters" of "Notes to
Consolidated Financial Statements" on page 15 of this report.


                                       26
<PAGE>

              ILLINOVA CORPORATION AND ILLINOIS POWER COMPANY

                   MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                FINANCIAL CONDITION AND RESULTS OF OPERATIONS

        Certain   information   contained  in  this  report  is  forward-looking
information  based on  current  expectations  and plans that  involve  risks and
uncertainties.   Forward-looking   information  includes,  among  other  things,
statements  concerning the impact of regulatory  changes,  plans for the Clinton
facility,  and success in  addressing  Year 2000  issues;  as well as those that
include  the words  "expect,"  "intend,"  "predict,"  "estimate,"  "believe"  or
similar  language.  Although  Illinova  and  IP  believe  these  forward-looking
statements are accurate,  their  businesses are dependent on various  regulatory
issues,  general  economic  conditions and future trends,  and these factors can
cause actual results to differ  materially from the  forward-looking  statements
that have been made.

        The following factors,  in addition to those discussed elsewhere in this
report and in the Annual Report on Form 10-K for the fiscal year ended  December
31,  1998,  and  subsequent  securities  filings  could cause  results to differ
materially  from management  expectations  as suggested by such  forward-looking
statements:  the outcome of state and Federal regulatory  proceedings  affecting
the  restructuring  of the  electric and utility  industry;  the impact on IP of
current  regulations  providing  for rate  reductions  and the phasing in of the
opportunity  for some  customers to choose  alternative  energy  suppliers;  the
effects of  increased  competition  in the future due to,  among  other  things,
deregulation  of certain  aspects of IP's business at both the state and Federal
levels,  and the increasing  popularity of alternative  sources of  electricity,
such  as  co-generation  facilities;   the  effects  of  the  implementation  of
Illinova's  various  strategies  to best  respond to its  changing  business and
regulatory  environment,  including  potential  acquisitions,  focused growth of
unregulated  businesses and other options;  the fluctuating  electricity  supply
demands of IP customers,  which, if increased  beyond IP's generation  capacity,
might result in unplanned outages forcing IP to acquire  additional  supplies in
the  electricity   marketplace  in  uncertain  and  often  volatile  prices  and
availability;  changes  in prices  and costs of fuel;  various  financial  risks
attendant  to selling or shutting  down  Clinton;  ongoing  nuclear  operational
exposures  until  Clinton  is sold or shut down;  the effect of events  that can
occur  in  Illinova's  or  IP's  business  operations  or  in  general  economic
conditions,  that could negatively impact its financial flexibility and costs of
financing;  the impact of the sale or  shutdown  of  Clinton on IP's  ability to
issue  indebtedness  under  its  existing  mortgages;   the  impact  of  current
environmental  regulations on utilities and the expectation  that more stringent
requirements  will be introduced over time,  which are likely to have a negative
financial effect;  various factors affecting  non-utility  investments,  such as
IGC's  investments  in  foreign   countries,   which  are  subject  to  currency
fluctuations, cyclical and sustained economic downturns and political risks; the
inherent risks of active purchases and sales by Illinova, through IEP and IP, of
electricity  and natural gas futures and similar  contracts;  and the ability of
Illinova and IP, their vendors and others to manage Year 2000 issues.

                                       27
<PAGE>

        All  forward-looking  statements in this report are based on information
that  currently is available.  Illinova and IP disclaim any obligation to update
any forward-looking statement.


ILLINOVA SUBSIDIARIES

        IP, a subsidiary of Illinova,  engages in the generation,  transmission,
distribution  and sale of electric energy and the  distribution,  transportation
and  sale of  natural  gas in the  State of  Illinois.  IP has  publicly  traded
preferred shares outstanding but its common stock is wholly-owned by Illinova.

        IGC is Illinova's wholly-owned independent power subsidiary. IGC invests
in energy supply  projects  throughout the world and competes in the independent
power  market.  IGC's  strategy is to invest in and develop  "greenfield"  power
plants,   acquire  existing  generation   facilities  and  provide  power  plant
operations and maintenance.

        IEP is a wholly-owned  subsidiary of Illinova.  IEP develops and markets
energy-related products and services to the unregulated energy market throughout
the United  States and Canada and  engages in the  brokering  and  marketing  of
electric power and gas.

        IIC is a  wholly-owned  subsidiary  of Illinova  and was licensed by the
State of Vermont as a captive insurance company.  The primary business of IIC is
to insure certain risks of Illinova and its subsidiaries.

        IBE is a wholly-owned  subsidiary of Illinova and was created to account
for  miscellaneous  business  activities not regulated by the ICC or the Federal
Energy Regulatory Commission (FERC) and not falling within the business scope of
other Illinova subsidiaries.

        Illinova Power  Marketing,  Inc. (IPMI) is a wholly-owned  subsidiary of
Illinova  created in April,  1999 to become the wholesale  generation  and power
marketing  company to which IP's fossil  generating  assets will be transferred.
Regulatory  approvals for the transfer of these assets and for IPMI's  marketing
activities are being sought.

RESTATEMENT OF THE CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEAR ENDED DECEMBER
31, 1998 AND AS OF MARCH 31, 1999

In February 2000,  Illinova and IP restated their  financial  statements for the
year ended  December  31, 1998 to reflect a revision to the initial  estimate of
the "Transition  period cost recovery"  regulatory asset established in December
1998 coincident with the impairment of the Clinton Power Station.  The effect of
this revision was to decrease the amount of the regulatory asset at December 31,
1998,  and  correspondingly  increase  the related  impairment  charge by $325.7
million  ($196.5  million net of tax).  The net effect of this  revision  was to
increase the previously reported net loss by $196.5 million, or $2.74 per common
share (basic and  diluted).  As a result of the  quasi-reorganization  described
below,  there was no effect of this  revision on "Retained  earnings;"  however,
"Total common stock equity" was reduced by $196.5 million.  The financial tables
and  stateemnts,  the  notes  to  the  consolidated  financial  statements,  and
management's  discussion  and  analysis of  financial  condition  and results of
operations in the 10-Q/A have been modified to reflect these changes.


LIQUIDITY AND CAPITAL RESOURCES
     CAPITAL RESOURCES AND REQUIREMENTS

        Cash  flows  from  operations  during  the first  three  months of 1999,
supplemented  by external  financing and cash on hand,  were  sufficient to meet
ongoing  operating  requirements  and to service  existing  common and preferred
stock  dividends,   debt  requirements,   IP's  construction   requirements  and
Illinova's investments in its subsidiaries.  However,  Illinova and IP liquidity
has  decreased  as  compared  to March 31,  1998,  as a result of higher  fossil
maintenance  costs,  increased  marketing  expenses,  and higher  Clinton  costs
combined  with lower  revenues  caused by the rate  reduction  mandated  by P.A.
90-561.

        Illinova  expects to use future  operating cash flows,  supplemented  by
external  financing,  to meet operating  requirements and to continue to service

                                       28
<PAGE>

existing  debt,  IP's  preferred  and  Illinova  common  stock  dividends,   and
Illinova's  and  IP's  anticipated   subsidiary   investments  and  construction
requirements for the remainder of 1999.

        Illinova  currently has authority to issue an additional $130 million in
debt securities under an existing $300 million shelf registration.  Illinova put
in place a $130 million  Revolving  Credit  Agreement in January 1999, which had
$64 million of capacity  available at March 31, 1999.  Prior to 1999 IP has paid
Illinova  dividends on the IP common stock held by Illinova to provide  Illinova
cash for  operations.  IP is limited in its payment of dividends by the Illinois
Public Utilities Act, which requires  retained earnings equal to or greater than
the amount of any proposed dividend  declaration or payment,  and by the Federal
Power Act,  which  precludes  declaration  or payment of  dividends  by electric
utilities  "out of money  properly  stated in a capital  account."  In the first
quarter of 1999, IP did not declare or pay dividends on its common stock.  Based
on the  Board's  current  dividend  policy,  management  expects  IP's  retained
earnings to be  sufficient  to support  Illinova  common  dividends.  IP also is
allowed to periodically  repurchase its common stock from Illinova in accordance
with authority  granted by the ICC,  contingent on IP meeting  certain cash flow
tests.  IP currently  does not satisfy this cash flow test and it is anticipated
that it will not satisfy the test throughout 1999. This test would not interfere
with the  repurchases,  if any, of Illinova  equity shares using  securitization
proceeds.  Illinova's  current $130 million  capacity  under the existing  shelf
registration  should meet its cash  requirements  through the remainder of 1999.
Illinova and IGC are developing additional financing capabilities to meet future
needs.

        Through May 10, 1999, IP redeemed  $57.1 million of 8.75% First Mortgage
Bonds due 2021, $229 million of 8.00% New Mortgage Bonds due 2023, $22.9 million
of 7.95% First  Mortgage  Bonds due 2004,  $36.8 million of 6.50% First Mortgage
Bonds due 1999,  $39.85 million of 7.50% New Mortgage Bonds due 2025, along with
154,900 shares of Monthly Income Preferred  Securities  (MIPS) and 83,780 shares
of various serial  preferred stock series.  These  securities were retired using
funds from securitization proceeds received in December 1998.

        IP's  capital  requirements  for  construction  were  approximately  $37
million and $48 million  during the three  months ended March 31, 1999 and 1998,
respectively.  Through 2000, IP plans to complete improvements in its generation
facilities  including  pollution  control  equipment and new combustion  turbine
peaking units.  Illinova estimates that it will spend approximately $370 million
for IP construction  expenditures in 1999. IP construction expenditures for 1999
through 2003 are expected to total  approximately $1.3 billion.  In light of the
December 1998 decision to exit Clinton and resulting Clinton impairment, Clinton
capital  expenditures are expensed as incurred and are not included in the above
estimates.  On March 2, 1999, IP deposited $62.1 million for partially  depleted
nuclear fuel in the Clinton  reactor with IP Fuel Company as a result of Clinton
Nuclear  Station  failing to restart by January 31, 1999.  The liability for the
nuclear  fuel was  accrued  as of  December  31,  1998.  As part of the  Clinton
impairment  entries at year end,  nuclear  fuel was written down to the expected
consumption through August 31, 1999.

        Additional   expenditures   may  be  required   during  this  period  to
accommodate   the  transition  to  a  competitive   environment,   environmental
compliance,  system upgrades, and other costs which cannot be determined at this
time.

                                       29
<PAGE>

        In  addition  to  IP  construction   expenditures,   Illinova's  capital
expenditures  for 1999  through  2003 are  expected to include  $592 million for
mandatory  debt  retirement  and  approximately  $600 million  target levels for
investment opportunities by the non-regulated  subsidiaries.  In addition, IPSPT
has long-term debt maturities of $86.4 million in each of the above years.

        IP currently has the  authority to issue $250 million in long-term  debt
and $500 million in short-term  debt,  which  includes $350 million in committed
bank lines of credit. Of these authorized  amounts, IP had $229 million at March
31, 1999, in remaining  capacity that may be utilized to issue  commercial paper
and extend  floating rate notes.  IP  anticipates  that this  liquidity  will be
sufficient to address its  requirements  into the fourth  quarter of 1999. IP is
developing additional financial capabilities to meet future needs.

        Presently, IP's mortgage bonds are rated Baa1 by Moody's, BBB+ by Duff &
Phelps  and BBB by  Standard  & Poor's.  IP's  preferred  stock is rated Baa2 by
Moody's,  BBB- by Duff & Phelps and BB+ by Standard & Poor's.  Illinova's senior
and medium-term  notes have a rating of Baa3 from Moody's and BBB- from Standard
& Poor's.  On July 6, 1998,  a change in outlook  was issued.  The outlook  from
Moody's  changed from stable to negative and the outlook from  Standard & Poor's
changed from positive to stable.

        On March 4, 1999,  Moody's  placed all of the securities of Illinova and
IP under  review  for  possible  downgrade,  citing  erosion of cash flow and an
expected  increase in leverage caused by the extended  Clinton outage.  On April
18, 1999, Moody's confirmed the security ratings of Illinova and IP, and removed
the securities from review for possible  downgrade  following the NRC's decision
to allow the  restart  of  Clinton  and the  announcement  of an  interim  sales
agreement  with AmerGen to purchase and operate  Clinton.  See "PECO  Agreement"
section  which  follows  on page 30 for  additional  information  regarding  the
interim sales agreement.


ACCOUNTING MATTERS

        For further  information on accounting issues, see "Accounting  Matters"
under  "Regulatory  and Legal Matters" of the "Notes to  Consolidated  Financial
Statements" on page 15 of this report.


CLINTON POWER STATION

        In  September  1996,  a leak in a  recirculation  pump  seal  caused  IP
operations personnel to shut down Clinton. Clinton has not resumed operation.

        In January 1997, the Nuclear  Regulatory  Commission (NRC) named Clinton
among  plants  having a trend of  declining  performance  and, in January  1998,
placed  Clinton on its "Watch List" of nuclear  plants that  require  additional
regulatory oversight.

        In late 1997, an independent team conducted an ISA to thoroughly  assess
Clinton's  performance,  and an NRC team performed an evaluation to validate the
ISA results.  Both teams  concluded  that the  underlying  reasons for Clinton's

                                       30
<PAGE>

performance problems were ineffective  leadership throughout the organization in
providing  standards of excellence,  complacency  throughout  the  organization,
barrier weaknesses, and weaknesses in teamwork.

        In January  1998,  IP and PECO  announced an agreement  under which PECO
provides  management  services for Clinton,  with IP  maintaining  the operating
license and ultimate oversight for the plant. PECO employees have assumed senior
positions at Clinton but the plant remains staffed primarily by IP employees. IP
selected PECO because it believed that bringing in PECO's experienced management
team would be the fastest and most  efficient  way to return  Clinton to service
and to a superior level of operation.

        In  February  1998,  IP filed with the NRC  Clinton's  Summary  Plan for
Excellence,  a comprehensive set of strategies and associated  actions necessary
to improve performance, permit safe restart of the plant, and achieve excellence
in operations.  IP is implementing  the actions required prior to plant restart.
The NRC is conducting a formal review process in parallel with IP's recovery and
restart program.

        On  April  27,  1999,  IP  received  notification  from the NRC that the
actions  required  prior to  restart  have  been  satisfied,  thus  lifting  the
regulatory agency's constraints on restarting the plant.

        Due to uncertainties of deregulated  generation  pricing in Illinois and
to various  operation  and  management  factors,  Illinova's  and IP's Boards of
Directors  decided in  December  1998 to sell or close  Clinton.  This  decision
resulted in an impairment of Clinton-related  assets and accrual of exit-related
costs of $1,523.7 million, net of income taxes, which was recognized as a charge
against earnings.

        The  prolonged  outage  at  Clinton  is  having  an  adverse  effect  on
Illinova's  and  IP's  financial   condition,   through  higher   operating  and
maintenance  and  capital  costs,  lost   opportunities  to  sell  energy,   and
replacement power costs. Due to the failure of Clinton to restart by January 31,
1999,  a  provision  in the  lease  agreement  between  IP and the Fuel  Company
required IP to deposit  $62.1 million cash for the  acquisition  of core fuel in
March  1999,  with the Fuel  Company  Trustee for the  benefit of  investors  in
secured Notes of the Fuel Company.


PECO AGREEMENT

        On April 15, 1999, IP announced that it had reached an interim agreement
with AmerGen  Energy  Company  (AmerGen),  whereby  AmerGen  would  purchase and
operate Clinton and IP would buy at least 75 percent of the plant's  electricity
output  for the next  several  years.  AmerGen is owned  jointly by PECO  Energy
Company  (PECO) and  British  Energy.  IP also  announced  a revised  management
agreement (Agreement) with PECO for the operation of Clinton commencing April 1,
1999. PECO will continue to manage the station pending a final agreement between
the parties and consummation of the sale.

        Under the  Agreement,  starting  April 1,  1999,  PECO is  assuming  the
plant's  direct  operating  and capital  expenditures,  regardless  of operating
status. This eliminates the Company's exposure to the uncertainty  regarding the

                                       31
<PAGE>

costs of returning Clinton to service and subsequent  operations.  In return for
transferring  this  financial  risk,  the Company has  modified  the  management
agreement with PECO to incorporate a new fee structure.  The Agreement obligates
IP to pay a management  fee to PECO  calculated  by  multiplying  a fixed dollar
amount per MWH times 80 percent of the  electricity  generated at Clinton during
the remainder of 1999. The financial  impact of this obligation is contingent on
three variables:  (1) whether Clinton restarts; (2) the capacity levels at which
it  subsequently  operates;  and (3) the prices at which the  electricity can be
sold from time to time. Based on the terms of the revised  management  agreement
the fees  payable to PECO  between  April 1 and December 31, 1999 could equal or
exceed the 1999  Clinton-related  O&M and capital  costs for which PECO  assumed
full  responsibility  commencing  April 1,  1999.  Under the  interim  agreement
AmerGen  has no  obligation  to buy the plant if it has not  actually  generated
electric  energy and been  synchronized  to the grid by December 31,  1999.  For
further information,  see the management agreement, which is attached as exhibit
A to the interim agreement filed as Exhibit 10.1 to this document.

        Under  the  terms  of the  interim  agreement,  AmerGen  will pay IP $20
million for Clinton  (including  nuclear fuel) and IP will have an obligation to
pay AmerGen $275 million to assume the Clinton decommissioning  liability. It is
anticipated that IP will transfer $95 million in its decommissioning  trust fund
and make  payments  of $30  million  in each of the  next six  years to meet its
decommissioning  obligation.  This compares  favorably with the $529 million NPV
that IP reported as its decommissioning liability as of December 31, 1998.

        IP has agreed to negotiate exclusively with AmerGen until June 15, 1999.
While the interim agreement provides a framework for further negotiations toward
a final agreement to sell Clinton to AmerGen,  several  significant steps remain
before a sale can be  completed.  Significant  income tax issues  related to the
funding of  decommissioning  costs,  similar to those being  addressed  with the
Internal Revenue Service by parties to other pending sales of nuclear generating
stations,  must be resolved to the mutual  satisfaction  of IP and AmerGen.  The
parties must conclude a definitive agreement.  The NRC must approve the sale and
the transfer of the operating  license;  the ICC must approve the sale; and, the
FERC must approve the PPA.


REGULATORY MATTERS

     FOSSIL GENERATION FILING

        IP  filed a  notice  with the ICC in April  1999,  as  required  by law,
advising of its  intention  to sell its fossil  generating  assets to  Illinova.
Subsequently,  Illinova intends to transfer those assets to its IPMI subsidiary.
IPMI, which was  incorporated in April 1999, will become a wholesale  generation
and power  marketing  company.  The proposed  transfer of assets from IP will be
done pursuant to Section 16-111(g) of The Customer Choice and Rate Relief Act of
1997,  which permits  transfer of utility assets on successful  demonstration to
the Commission that certain financial and reliability  criteria will be met. The
Commission  will have 90 days to review the filing and make its decision.  Also,
IP intends  to make a filing  with the FERC  during the second  quarter of 1999,
seeking approval of a proposed Purchase Power Agreement between IP and IPMI.

                                       32
<PAGE>

ATTORNEY GENERAL COMPLAINT

        On July 17,  1998,  a  complaint  against IP was filed at the ICC by the
Illinois State Attorney  General.  The complaint  alleges that IP failed to meet
its statutory obligations to provide adequate and reliable service in connection
with last summer's electric supply situation (for further disclosure, see "Power
Supply and  Reliability"  on page 31).  It asks the ICC to conduct a  management
audit of IP and seeks an order  requiring IP to offer  compensation to customers
for voluntary conservation and service interruptions.  The company has agreed to
provide the Attorney General with a reliability report. The Attorney General and
the Company  have  mutually  agreed on an  independent  committee of two outside
experts to review the report.  The company believes this approach will lead to a
settlement of the complaint  without a material  adverse effect.  Although there
were limited calls for voluntary conservation,  and interruptible customers were
curtailed, no firm load was interrupted or curtailed during all of 1998.


SOYLAND POWER COORDINATION AGREEMENT

        The FERC approved an amended Power Coordination  Agreement (PCA) between
Soyland  and IP in July 1997.  Under the  amended  PCA,  Soyland  was allowed to
prepay an Elected Capacity Reduction Fee associated with a unilateral  reduction
in its base capacity  charge under the PCA. In December  1997,  Soyland signed a
letter of intent to pay in advance the remainder of its base capacity charges in
the PCA.  Soyland  obtained the  necessary  financing and  regulatory  approvals
during the second quarter of 1998. During the first quarter of 1998, IP received
$30 million from Soyland and the remaining  $40 million was received  during the
second quarter of 1998. The prepayment was deferred and was being  recognized as
interchange  revenue  evenly  over the initial  term of the PCA,  which was from
September 1, 1996 through August 31, 2006. In March 1999,  Soyland and IP signed
a new PCA agreement  and filed this  agreement  with FERC.  The new agreement no
longer obligates IP to provide capacity and energy to Soyland with the exception
of a small amount of capacity for the purpose of supplying Soyland's load within
the IP Control Area. Therefore,  the new PCA triggered the immediate recognition
of the  deferred  revenue from the  prepayment  of the base  capacity  charge as
discussed  above.  This resulted in an increase in  interchange  revenues of $61
million in the first quarter of 1999.


UNIFORM FUEL ADJUSTMENT CLAUSE (UFAC)

        Prior to March  1998,  the  costs of fuel for  electric  generation  and
purchased power costs were deferred and recovered from customers pursuant to the
UFAC. On March 6, 1998, IP initiated an ICC  proceeding to eliminate the UFAC in
accordance  with  P.A.  90-561.  A new base  fuel cost  recoverable  under  IP's
electric  tariffs was  established,  effective  on the date of the filing.  UFAC
elimination prevents IP from automatically passing cost increases through to its
customers and exposes IP to the risks and opportunities of cost fluctuations and
operating efficiencies.

        Under UFAC, IP was subject to annual ICC audits of its actual  allowable
fuel  costs.  Costs  could  be  disallowed,  resulting  in  negotiations  and/or
litigation  with the ICC. In 1998, IP agreed to  settlements  with the ICC which

                                       33
<PAGE>

closed  the  audits  for all  previously  disputed  years.  As a  result  of the
settlements,  IP electric  customers  received refunds totaling $15.1 million in
the first quarter of 1999. These refunds complete the process of eliminating the
UFAC at IP.


     DEREGULATION RULEMAKINGS AND TARIFFS

        The Illinois Public Utilities Act was significantly  modified in 1997 by
P.A.  90-561,  but the ICC  continues  to have broad powers of  supervision  and
regulation  with  respect  to the rates and  charges  of IP,  its  services  and
facilities,  extensions or abandonment of service,  classification  of accounts,
valuation and depreciation of property, issuance of securities and various other
matters.  Before a significant plant addition may be included in IP's rate base,
the ICC must determine that the addition is reasonable in cost, prudent and used
and useful in  providing  utility  service to  customers.  IP must  continue  to
provide  bundled retail  electric  service to all who choose to continue to take
service at tariff rates,  and IP must provide  unbundled  electric  distribution
services  to all  eligible  customers  as defined by P.A.  90-561 at rates to be
determined  by the ICC.  During  1998,  pursuant  to  authority  granted in P.A.
90-561,  the ICC issued  rules  associated  with (i)  transactions  between  the
utility  and its  affiliates;  (ii)  service  reliability;  (iii)  environmental
disclosure; and (iv) alternative retail electric supplier certification criteria
and  procedures.  During 1999,  it is expected that the ICC will rule on (i) the
rates  and  terms  associated  with  the  provision  of  delivery  services  for
commercial and industrial  customers;  (ii) establishing the neutral fact finder
price  utilized in (a)  calculating  competitive  transition  costs and (b) IP's
power purchase tariff;  (iii) the competitive  transition cost methodology;  and
(iv)  guidelines  regarding  standards of conduct and functional  separation.  A
proceeding  will be opened in September  1999 to address the issue of unbundling
billing,  metering,  and customer  handling with a final decision to be rendered
prior to the third quarter of the year 2000. The final rule on delivery  service
tariffs is expected in early August.

        Under the new rules,  Illinois  utilities must keep records  identifying
service interruptions experienced by each customer. Illinois utilities must also
file an annual report  detailing the  reliability  of its service and explaining
its plans for  reliability  improvements.  In  addition,  each utility must also
report the number  and causes of service  interruptions  that were due to causes
within the utility's  control.  Outage targets were  established  for service to
individual customers and for system performance.

        The extent to which revenues are affected by P.A.  90-561 will depend on
a number of factors  including  future  market  prices for  wholesale and retail
energy,  load growth and demand levels in the current IP service territory,  and
success in marketing to customers outside IP's existing service  territory.  The
impact on net income will depend on, among other things,  the amount of revenues
earned and the cost of doing business.

     OPEN TRANSMISSION ACCESS AND COMPETITION

        In January 1998, IP, in conjunction with eight other transmission-owning
entities,  filed  with  the FERC  for all  approvals  necessary  to  create  and
implement the Midwest Independent  Transmission System Operator, Inc. (MISO). On

                                       34
<PAGE>

September 16, 1998, the FERC issued an order authorizing the creation of a MISO.
The MISO has elected a seven-person independent board of directors. The goals of
this  joint  undertaking  are to:  1) put in  place a tariff  allowing  easy and
nondiscriminatory  access to transmission facilities in a multi-state region, 2)
enhance   regional   reliability  and  3)  establish  an  entity  that  operates
independently of any transmission  owner(s) or other market  participants,  thus
furthering  competition in the wholesale  generation  market consistent with the
objectives  of the  FERC's  Order  No.  888.  Since  January  1998,  four  other
transmission-owning  entities  joined  the  MISO.  Participation  in an  ISO  by
utilities  serving  retail  customers  in Illinois  was one of the  requirements
included in P.A. 90-561, enacted in 1997. The MISO has a stated goal to be fully
operational by January 1, 2001.

        See "Open Access and Competition"  under  "Regulatory and Legal Matters"
of the "Notes to  Consolidated  Financial  Statements" on page 14 of this report
for additional information.

YEAR 2000 DATA PROCESSING

        Passing  from  1999 into  2000  creates  a risk that  computer-dependent
processes will fail because the date will be read as "1900."  Illinova began its
Year 2000 (Y2K) project  in November 1996. The project scope  encompasses all of
Illinova's  subsidiaries  including IP, IGC, and IEP. A central  organization is
providing  overall project guidance and coordination  among the business groups,
meeting monthly to share information,  conducting internal project reviews,  and
producing  monthly  status  reports  to  all  levels  of  Illinova   management.
Bi-monthly  Year 2000  readiness  reports are provided to the Illinova  Board of
Directors.

        The Year 2000  project  involves  evaluation  and  testing of  software,
hardware,  and business  processes,  including  mainframe and personal  computer
software  and  hardware,  process  computer  software  and  hardware,  end  user
computing,  telecommunications and networks, vendor purchased packages, embedded
systems, facility control systems, vendors/supplies, financial institutions, and
electronic interfaces with outside agencies.

        The project is divided into two focus areas.  The first focus area deals
with information technology (IT) software,  hardware,  and infrastructure.  This
includes such items as the billing  system,  payroll  system,  accounts  payable
system, personal computers, telecommunications, networks, and mainframes.

        The second focus area targets non-IT  operational  systems and processes
which  encompass  most of the systems and business  processes  actually  used to
deliver  electricity and gas to customers.  This is also the area where embedded
systems  and  microprocessors  are found.  Included in this focus area are power
plant facilities,  transportation  systems such as railways,  barges, etc., fuel
suppliers,   electric  and  gas  transmission   and   distribution   facilities,
substations  and  transformers,  meters,  building  systems  such  as  HVAC  and
security, and financial institutions.

                                       35
<PAGE>

        The overall status of Illinova's Y2K project is illustrated in the table
below.

                                     Illinova Status
                                       March 1999

                                IT                         Non-IT
                          %        Completion  *         %       Completion  *
                       Complete       Date            Complete     Date

Awareness                100        02/01/97   a         100      05/31/98   a

Inventory                100        01/20/97   a         100      02/28/99   a

Assessment               100        05/09/97   a         100      02/28/99   a

Process Analysis         100        11/30/98   a         100      03/31/99   a

Implementation -
  (Mission Critical)      81        06/30/99   e          74      10/31/99   e

Implementation -
  (Important to
   Operations)            87        05/31/99   e          73      10/31/99   e

Contingency Planning      20        06/30/99   e          35      06/30/99   e

*"a" = Actual Completion Date, "e" = Estimated Completion Date

        IP has  completed  its  awareness,  inventory,  assessment,  and process
analysis  phases.  The table  below  provides  further  details  differentiating
between IT and non-IT for IP alone.

                                       36
<PAGE>

                                  IP Status
                                  March 1999

                                IT                         Non-IT
                          %        Completion  *         %       Completion  *
                      Complete       Date           Complete     Date

Awareness               100        02/01/97   a        100      04/29/98   a

Inventory               100        01/20/97   a        100      07/31/98   a

Assessment              100        05/09/97   a        100      09/30/98   a

Process Analysis        100        11/30/98   a        100      02/28/99   a

Implementation -                                                            **
  (Mission Critical)     81        06/30/99   e         79      10/31/99   e

Implementation -
  (Important to                                                             ***
   Operations)           87        05/31/99   e         82      10/31/99   e

Contingency Planning     20        06/30/99   e         41      06/30/99   e

*"a" = Actual Completion Date, "e" = Estimated Completion Date

** It is currently  projected  that all IP mission  critical items will be fully
Year 2000 ready by June 30, 1999,  with the  exception  of one process  computer
system at Clinton.  However,  Clinton still plans to be Year 2000 ready, per NRC
requirements,   by  developing  contingency  plans  that  will  allow  continued
operation.

*** It is currently  projected that all IP important to operations items will be
fully Year 2000 ready by June 30,  1999,  with the  exception  of three  process
computer  systems at Clinton and one process computer system in our fossil power
system.  Contingency  plans  for these  systems  are  being  developed  to allow
continued operations.

        IT systems  (such as  billing,  payroll,  etc.) and  infrastructure  are
approximately 84% complete, with 100% completion projected by June 30, 1999. The
customer billing system,  materials management system,  accounts payable system,
power plant maintenance system, payroll system, and shareholder system have been
remediated  and are now Year 2000  ready.  Year 2000 work has not  caused any IT
projects to be delayed, and thus no maintenance costs have been deferred.

        The United  States  Department  of Energy  (DOE) has  charged  the North
American   Electric   Reliability   Council  (NERC)  with  taking  the  lead  in
facilitating North  American-wide  coordination of electric utilities' Year 2000
efforts.  The collective  efforts of the industry will minimize risks imposed by
Year 2000 to the reliable supply of  electricity.  NERC has in turn assigned the
regional  reliability  councils the responsibility of assessing their respective
networks to ensure reliable  electric supply. IP is taking an active role within

                                       37
<PAGE>

its regional  council  (MAIN) in  assessment  and  renovation of the grid and in
developing contingency plans to minimize any unexpected Year 2000 grid problems.
IP  participated  in the  April  NERC  drill  and is also  participating  in the
September NERC drill.

        NERC has recommended that all "mission  critical" systems needed to meet
demand and  reliability  obligations  be Year 2000 ready by June 30, 1999. IP is
working  diligently  to meet  the  June  30,  1999,  deadline.  It is  currently
projected that all of IP's power plants and field  transmission and distribution
items  will be fully  Year 2000  ready by that date  with the  exception  of one
process computer system at Clinton. Clinton still plans to be Year 2000 ready by
June 30, 1999, per NRC requirements,  by developing  contingency plans that will
allow continued operation.

        The  total  cost for  achieving  Year 2000  readiness  for  Illinova  is
estimated to be  approximately  $20.5 million  through 1999.  Through the end of
March 1999,  $11.8  million,  or 57% of the total $20.5  million had been spent.
Invoicing is lagging a few months behind when the actual work is completed,  and
Clinton has had to  reschedule  some tasks to a later date to coincide  with the
plant startup schedule.

        Development of contingency plans has begun and are focused on Illinova's
"mission critical" business processes.  Contingency plans are being developed in
accordance  with industry  guidelines,  such as NERC and the General  Accounting
Office,  and involve senior management review and approval.  These plans address
business  continuity and the ability to deliver essential  products and services
to customers in the event of unexpected Year 2000 problems.

        Illinova is currently assessing potential worst-case  scenarios.  Such a
scenario  might  include  one or both of the  following  events:  winter  storms
coupled with a significant  Year 2000 system  problem that  compounds  emergency
response  efforts  and/or  loss of a  major  telecommunications  carrier  causes
disruptions in dispatching generation, dispatching emergency response crews, and
communications with financial institutions.

        Contingency  plans will address the above scenarios as well as any other
potential  scenarios  that could  affect  the  ability  to serve  customers  and
maintain the financial viability of Illinova.


DIVERSIFIED BUSINESS ACTIVITIES

        In February, 1999, IEP, a wholly-owned subsidiary of Illinova, purchased
the  Indiana-based  natural gas  management  operations  of Equitable  Resources
Marketing Company.  Equitable  Resources Marketing was a subsidiary of Equitable
Resources,  Inc., (ERI) of Pittsburgh,  PA. ERI is an integrated  energy company
that produces, markets, and distributes natural gas and oil.

        In April 1999,  IEP also  purchased  Quality  Energy  Services  (QES), a
Tempe, AZ based natural gas marketing company.

        In May 1999,  IEP  purchased  the Chicago,  IL based  holdings of Energy
Dynamics, Inc., (EDI) an independent natural gas marketing firm based in Rolling
Meadows, IL.

                                       38
<PAGE>

        The 1998 combined  revenues of ERI, QES, and EDI were  approximately $67
million.


ENVIRONMENTAL MATTERS

     GAS MANUFACTURING SITES

        See  "Manufactured Gas Plant Sites" under "Regulatory and Legal Matters"
of the "Notes to Consolidated Financial Statements" on page 16 of this report.

     NITROGEN OXIDE

        On October 27, 1998,  the U.S. EPA finalized  air  pollution  rules that
will require  substantial  reductions  of NOx emissions in Illinois and 21 other
states.  This rule will  require the  installation  of NOx controls by May 2003,
with each Illinois  utility's  exact  reduction  requirement  to be specified in
1999.  Preliminary  estimates of the capital expenditures needed in 2000 through
2003 to comply with these new NOx  limitations  are $90 million to $140 million.
NOx estimates are included in forecasted capital  expenditures.  The legality of
this proposal,  along with its technical  feasibility,  is being challenged by a
number of states, utility groups, and utilities, including IP.

     EMISSION ALLOWANCE EXCHANGES

        The  value of  emission  allowances  expected  to be given up in  future
periods as the result of exchange  agreements  was recorded in the third quarter
1998 at the current market price and a liability of $9.8 million was recognized.
This  obligation will be adjusted as price  fluctuates  until the allowances are
surrendered.  The market value and recorded liability of the allowances at March
31, 1999, was $10.4 million.

     GLOBAL WARMING

        On December 11, 1997,  international  negotiations to reduce  greenhouse
gas emissions  concluded with the adoption of the Kyoto Protocol.  This Protocol
requires the United States to reduce  greenhouse  gas emissions to 7% below 1999
levels  during  the  years  2008  through  2012 and to make  further  reductions
thereafter.  Before it can take effect,  this  Protocol  must be ratified by the
United States Senate.  However,  United States Senate Resolution 98 which passed
95-0 in July 1997,  says the Senate would not ratify an agreement  that fails to
include  commitments for all countries or would damage the economy of the United
States.  Since the Protocol does not contain  these key  elements,  ratification
would be a major  political  issue. It is anticipated  that a ratification  vote
will be delayed until the current  administration feels the Protocol could pass,
or an attractive alternative to the Kyoto Protocol is found.

        IP will face major  changes in the way it generates  electricity  if the
Kyoto  Protocol  is  ratified,   or  if  the  Protocol's   reduction  goals  are
incorporated into other environmental regulations. IP would have to repower some
generating  units and change  from coal to natural  gas in other units to reduce
greenhouse  gas  emissions.  IP estimates  that  compliance  with these proposed
regulations  may  require  significant  capital  outlays  and  annual  operating
expenses which could have a material adverse impact on Illinova and IP.

                                       39
<PAGE>

POWER SUPPLY AND RELIABILITY

        Electricity  was in short supply during the 1998 summer  cooling  season
because of an unusually high number of plant outages in the Midwest  region.  IP
bought generation and transmission capacity to prevent firm load curtailment and
took additional steps to avoid power outages,  including upgrading  transmission
lines and equipment,  readying  emergency  procedures,  and returning to service
five units that had been in cold shutdown.  Expenses incurred as a result of the
shortage have had a material adverse impact on Illinova and IP.

        The electric energy market  experienced  unprecedented  prices for power
purchases  during the last week of June 1998. IP's power purchases for 1998 were
$517 million  higher than 1997 due to summer  price  spikes  resulting in a $274
million  increase in power  purchased,  additional  purchases of $215 million to
serve increased  volumes of interchange  sales, and market losses of $28 million
recorded on forward power purchase and sales  contracts as part of the wholesale
trading business.  Income from interchange sales was $382 million higher than in
1997 due to increased sales volumes and higher prices.

        IP expects to have in excess of 400 MW of additional  generation on line
for the summer of 1999. This includes  approximately  235 MW from five oil-fired
units which were brought up from cold shutdown during the summer of 1998 and 176
MW from four natural gas turbines that IP plans to install  before the summer of
1999. Total cost for the two projects is estimated at $87 million. IP also plans
to refurbish nine gas turbines  already in service at a cost of $13 million.  In
addition,  the restructuring of the Soyland PCA agreement freed up an additional
287 MW of capacity.  IP expects to have sufficient  generating capacity to serve
firm load  during the  periods  of peak  summer  demand  using  demand-side  and
supply-side initiatives taken in response to the 1998 regional supply crisis. If
generation  is lost or demand is at  unprecedented  levels,  firm load  could be
curtailed.


RESULTS OF OPERATIONS

                 THREE MONTHS ENDED March 31, 1999 AND 1998

         Electric  Operations - Electric  revenues for the first quarter of 1999
decreased  $21.4 million  compared to the first quarter of 1998 primarily due to
the  15%  residential   rate  decrease   effective   August  1,  1998,  and  the
reclassification of revenue-related taxes mandated by deregulation  legislation.
Revenue-related  taxes are now accounted  for as a liability,  and both revenues
and general taxes are reduced.  The rate decrease resulted in revenue reductions
of $17.4 million in the first  quarter of 1999.  The removal of $11.3 million in
excise and  municipal  taxes from  revenue  and  general  taxes also  negatively
impacted electric revenues.  These reductions were partially offset by increased
sales in 1999. Electric interchange revenues decreased $2.3 million. Interchange
activity  decreased  $59.0 million along with a $3.4 million  expense to reflect
mark-to-market for forward contracts and options. These decreases were offset by

                                       40
<PAGE>

a $60.1  million  revenue  recognition  resulting  from the  restructuring  of a
Soyland Power Cooperative power supply contract. Power purchased decreased $45.4
million due largely to decreased interchange activity.  During the quarter, fuel
for electric  plants  decreased  $4.3 million due to  decreased  generation  and
decreased  emission allowance costs. These factors combined to increase electric
margin $26.0 million for the quarter.

         Kilowatt hour (kwh) sales to ultimate consumers  increased 6.5% for the
quarter due to increases of 11.3% and 9.5% in the residential and the commercial
markets, respectively. Heating degree days increased approximately 12% from 1998
which contributed to the increase in sales to the temperature-sensitive markets.

         For the first quarter of 1999 and 1998,  Clinton was unavailable due to
the continued outage which began September 6, 1996. The equivalent  availability
for IP's coal-fired  plants was 77.5% and 79.5% for the three months ended March
31, 1999 and 1998, respectively.

         Gas Operations - For the quarter,  gas margin  remained  constant.  Gas
revenues  increased  $6.5  million  reflecting  a 10%  increase  in therm  sales
(excluding  transport)  caused by colder winter  weather.  Gas  purchased  costs
increased $6.5 million due to the higher consumption.

        Operation and Maintenance  Expenses - Of the current quarter increase of
$42.9 million, $29.0 million is due to higher operating and maintenance expenses
associated  with the  Clinton  outage.  This $29.0  million  increase in Clinton
expenses  includes  $12.4  million of costs  which  would  have been  considered
capital  additions  had Clinton not been  impaired.  For more  information,  see
"Clinton Power Station" of the  "Management's  Discussion and Analysis" on pages
13-14 of this report.

        Depreciation  and  amortization  -  The  decrease  in  depreciation  and
amortization  for the first  quarter of 1999  compared to 1998 was $6.2 million.
Due to the Clinton impairment,  nuclear depreciation decreased approximately $23
million but was offset by approximately  $18 million for the amortization of the
adjustment to fair value for the fossil generation assets.

        Diversified  enterprises  - Due  primarily  to decreased  power  trading
activity at IEP, diversified  enterprise revenues decreased $9.8 million for the
first quarter of 1999, which was offset by a decrease in diversified  enterprise
expenses of $13.2 million.

        Miscellaneous - net - Of the current quarter  increase of $12.4 million,
$6.2 million is income from IGC  investments  not accounted for under the equity
method.  Interest income increased $3.1 million  primarily due to the investment
of the proceeds of the transitional funding trust notes issued in December 1998,
and the  adjustment in the net present value of the  decommissioning  regulatory
asset. Revenues from non-utility  operations also increased in the first quarter
of 1999.

        Interest  expense - The increase in interest  expense of $6.5 million in
the first  quarter of 1999 is  primarily  the result of  interest  on  increased
long-term   debt  and  the   adjustment   in  the  net  present   value  of  the
decommissioning  liability,  offset by lower  interest  charges  resulting  from
reduced short-term borrowings in 1999.

                                       41
<PAGE>

        Earnings  per Common  Share - The earnings per common share for Illinova
during the first quarter of 1999 and 1998 resulted from the  interaction  of all
the  factors   discussed  herein  as  well  as  fewer  shares  of  common  stock
outstanding.


RESULTS OF OPERATIONS - ILLINOVA SEGMENTS OF BUSINESS

Customer Service
For the quarter,  both the contribution margin and cash flow measures were lower
than for the corresponding  quarter in 1998, primarily due to decreased electric
revenues as discussed below.

Transmission, Distribution and Sale of Electric Energy
The Customer  Service  Business  Group  derives its revenues  through  regulated
tariffs.  Its source of  electricity  is the Wholesale  Energy  Business  Group;
electricity was provided to the Customer  Service  Business Group at a fixed 2.9
cents per kwh in 1999 and 2.5 cents per kwh in 1998,  primarily due to decreased
electric revenues as discussed below.

Retail electric revenues,  excluding interchange sales, for the first quarter of
1999  decreased  7.7% over the first quarter of 1998 due to the 15%  residential
decrease  mandated  by  P.A.  90-561,  which  became  effective  July  15,  1998
voluntarily  advanced  by IP from the  statutory  effective  date of  August  1,
partially  offset by increased kwh sales to customers.  Additionally,  operating
costs were higher  during the first  quarter of 1999 compared to the same period
in 1998.

Transmission, Distribution and Sale of Natural Gas
Revenues are derived  through  regulated  tariffs.  During the first  quarter of
1999, revenues from gas sales and transportation were up 5.5%, while therms sold
and  transported  were up 7.7% over the first  quarter of 1998.  The increase in
therm sales was caused by a return to normal weather after the milder-than-usual
weather  experienced  in  1998.  The  margin  on gas  sales  and  transportation
decreased  0.2%  during the period due to an  increase  in gas costs,  offset by
decreases in both therms sold and therms transported.

Wholesale Energy
Factors leading to the increased contribution margin during the first quarter of
1999 compared to 1998 include: higher intersegment revenues in 1999 due to a new
pricing agreement;  higher purchased power costs, partially offset by lower fuel
costs, due to fossil generating  stations having extended outages during 1999; a
one-time credit to electric  interchange  revenues from the  restructuring  of a
power supply  contract;  market losses  recorded on forward  power  purchase and
sales  contracts  as  part  of  the  wholesale  trading  business;   and  higher
depreciation expense due to the revaluation of fossil assets during the December
1998 quasi-reorganization.

Cash flow is lower than 1998 due to cash  received in 1998  related to the power
supply contract  buyout,  increased  expenditures  for major capital projects in
1999, payments in 1999 for prepaid fuel purchases, as well as changes in current
assets and liabilities due to normal operating activity.

                                       42
<PAGE>

Wholesale  Energy provided power to the Customer  Service Group at 2.9 cents per
kwh during the first Quarter of 1999 compared to 2.5 cents per kwh in 1998.

Nuclear
IP's only nuclear  generating  station,  Clinton,  did not generate  electricity
during the first  quarter of either 1999 or 1998.  Its only  revenues were those
paid by  customers  under a  tariff  rider to fund  the  decommissioning  trust.
Nuclear's results were unfavorably  affected by higher operating and maintenance
expenses and capital being expensed in 1999.

Illinova Energy Partners, Inc.
Although negative,  contribution  margin is slightly more favorable than in 1998
due to increased  revenues  and margin  earned on  electricity  and natural gas,
offset by continuing  investment in future growth and market penetration in both
the Midwest and Western United States.

Illinova Generating Company
IGC's  positive  contribution  margin  during the first quarter of 1999 compared
with the first quarter of 1998 reflect  improvement due primarily to an increase
in income from investing activities. The increase in cash flows is attributed to
increased distributions from project investments.

Other
Included in this category are the Financial Business Group, the Support Services
Business  Group,  and Corporate.  These segments did not  individually  meet the
minimum threshold requirements for separate disclosure.

See "Illinova Segments of Business" in the footnotes to the financial statements
on page 19 for additional information.


RESULTS OF OPERATIONS - ILLINOIS POWER SEGMENTS OF BUSINESS

Customer Service
For the quarter,  both the contribution margin and cash flow measures were lower
than for the corresponding  quarter in 1998, primarily due to decreased electric
revenues as discussed below.

Transmission, Distribution and Sale of Electric Energy
The Customer  Service  Business  Group  derives its revenues  through  regulated
tariffs.  Its source of  electricity  is the Wholesale  Energy  Business  Group;
electricity was provided to the Customer  Service  Business Group at a fixed 2.9
cents per kwh in 1999 and 2.5 cents per kwh in 1998.

Retail electric revenues,  excluding interchange sales, for the first quarter of
1999  decreased  7.7% over the first quarter of 1998 due to the 15%  residential
decrease  mandated  by  P.A.  90-561,  which  became  effective  July  15,  1998
voluntarily  advanced  by IP from the  statutory  effective  date of  August  1,
partially  offset by increased kwh sales to customers.  Additionally,  operating
costs were higher  during the first  quarter of 1999 compared to the same period
in 1998.

                                       43
<PAGE>

Transmission, Distribution and Sale of Natural Gas
Revenues are derived  through  regulated  tariffs.  During the first  quarter of
1999, revenues from gas sales and transportation were up 5.5%, while therms sold
and  transported  were up 7.7% over the first  quarter of 1998.  The increase in
therm sales was caused by a return to normal weather after the milder-than-usual
weather  experienced  in  1998.  The  margin  on gas  sales  and  transportation
decreased  0.2%  during the period due to an  increase  in gas costs,  offset by
decreases in both therms sold and therms transported.

Wholesale Energy
Factors leading to the increased contribution margin during the first quarter of
1999 compared to 1998 include: higher intersegment revenues in 1999 due to a new
pricing agreement;  higher purchased power costs, partially offset by lower fuel
costs, due to fossil generating  stations having extended outages during 1999; a
one-time credit to electric  interchange  revenues from the  restructuring  of a
power supply  contract;  market losses  recorded on forward  power  purchase and
sales  contracts  as  part  of  the  wholesale  trading  business;   and  higher
depreciation expense due to the revaluation of fossil assets during the December
1998 quasi-reorganization.

Cash flow is lower than 1998 due to cash  received in 1998  related to the power
supply contract  buyout,  increased  expenditures  for major capital projects in
1999, payments in 1999 for prepaid fuel purchases, as well as changes in current
assets and liabilities due to normal operating activity.

Wholesale  Energy provided power to the Customer  Service Group at 2.9 cents per
kwh during the first quarter of 1999 compared to 2.5 cents per kwh in 1998.

Nuclear
IP's only nuclear  generating  station,  Clinton,  did not generate  electricity
during the first  quarter of either 1999 or 1998.  Its only  revenues were those
paid by  customers  under a  tariff  rider to fund  the  decommissioning  trust.
Nuclear's results were unfavorably  affected by higher operating and maintenance
expenses and capital being expensed in 1999.

Other
Included in this category are the Financial Business Group, the Support Services
Business  Group,  and  other  corporate   functions.   These  segments  did  not
individually meet the minimum threshold requirements for separate disclosure.

See "IP Segments of Business" in the  footnotes to the  financial  statements on
page 23 for additional information.

                                       44
<PAGE>

ITEM 3. Quantitative and Qualitative Disclosures About Market Risk


RISK MANAGEMENT

        Illinova is exposed to both trading and  non-trading  market risks.  The
non-trading  market risks to which  Illinova is exposed  include  interest  rate
risk, equity price risk,  foreign currency risks, and commodity price risks. The
market  risk due to trading is  comprised  basically  of  commodity  price risk.
Illinova's  risk  management  policy  allows  the  use of  financial  derivative
products,  like  futures,  swaps,  and  certain  types of  options to manage its
positions.  Illinova uses various approaches to measure and monitor market risk,
which include  Value-at-Risk (VaR) and position  sensitivity  measures to market
factors.  VaR is the maximum  potential loss that may be incurred on a portfolio
due to  adverse  movements  in  market  factors,  given a  confidence  level and
specified  holding  period.  VaR does not represent the expected nor the maximum
loss that may  actually  occur  since  gains and losses  may  differ  from those
estimated,  based on actual  fluctuations  in market  factors and changes in the
composition of the portfolio during a given evaluation period.

INTEREST RATE RISK

        Illinova is exposed to interest rate risk from its financing activities,
through issuance of fixed or  variable-rate  debt and acquisition of bank notes.
IP is likewise  exposed to interest  rate risk  resulting  from its  issuance of
fixed or  variable-rate  debt,  commercial  paper,  and bank  notes  that it has
obtained.  Interest  rate  exposure  is managed  in  accordance  with  policy by
limiting the variable-rate  exposure to a certain  percentage of capitalization.
Interest rate derivative  instruments  are also used when deemed  appropriate to
change the  composition of variable to fixed-rate  component.  In addition,  the
sensitivity  of the  portfolio to changes in market  factors like  interest rate
levels  and  volatility  are also  monitored.  At March 31,  1998,  there was no
interest rate derivative instrument in use.

        Interest rate VaR is calculated based on a variance-covariance  approach
using the RiskMetrics FourFifteen(TM) model. A 95 percent confidence level and a
one-day  holding period is currently used. The interest rate risk as measured by
VaR at March 31, 1999, as compared to VaR at December 31, 1998, is given below.

- --------------------------------------------------------------------------------
(Millions of dollars)                   March 31, 1999       December 31,1998
- --------------------------------------------------------------------------------
                                            VaR                     VaR

Illinova, including IP debt                $9.2                   $14.9

IP debt only                               $8.7                   $14.2
- --------------------------------------------------------------------------------

        Contributing  factors to the  decrease  in VaR were  retirement  of high
coupon  debt with  maturities  extending  past the year 2020 and an  increase in
commercial  paper levels from that at year end.  The December 31, 1998,  VaR was
unusually  high due to the  issuance  of  securitized  debt with the  removal of
called  bonds not  occurring  until  after year end.  The  securitized  debt has
shorter  maturities  than the called  bonds,  which further  contributed  to the
decrease in VaR.

                                       45
<PAGE>

COMMODITY PRICE RISK

Trading Positions

        Illinova is exposed to commodity  price risk through IEP's power trading
activities   and  IP's   trading  and   non-trading   operations.   IEP  uses  a
variance-covariance  approach to calculate VaR,  similar to the  RiskMetrics(TM)
model, to monitor and control its market risk positions. IP measures,  monitors,
and manages its commodity  price risk using a proprietary  VaR model employing a
Monte Carlo simulation  technique.  IP and IEP both use a 95 percent  confidence
level and a five-day  holding  period to monitor their daily trading market risk
positions.  During the quarter ended March 31, 1999, the Board approved a change
in the risk  management  policy,  to use a five day holding  period instead of a
four-day period.  IP's and IEP's trading VaR at March 31, 1999, and December 31,
1998, as restated using a five day holding period follow:

- --------------------------------------------------------------------------------
                                     March 31, 1999        December 31, 1998
- --------------------------------------------------------------------------------
(Millions of Dollars)                       VaR                   VaR

IP                                         $0.6                   $1.4
IEP                                        $0.1                   $0.1
- --------------------------------------------------------------------------------

        IP and IEP both use stress and scenario testing to control "event risk",
i.e., the risk that certain  stressful  market events will occur and result in a
loss. In addition,  option positions are monitored using sensitivity limits such
as delta  (sensitivity  to price change),  gamma  (sensitivity of delta to price
change), and vega (sensitivity to change in implied volatility.)

Non-Trading Positions

        IP is also  exposed to  non-trading  commodity  price risk  through  its
energy generation business.  IP uses physical contracts and is authorized to use
financial  derivative  instruments  to manage its native load  requirements.  To
measure,  monitor,  and  control  the  commodity  price risk of its  non-trading
portfolio,  IP uses the same  proprietary  Monte Carlo model used in the trading
portfolio.

        The Monte-Carlo  simulation process used in this VaR model generates the
power  price,  fuel price and load series that are used to value the  generation
assets,  fuel assets,  and  contracts  entered into by the firm (e.g.,  tolling,
forward,  call & put options). A sophisticated process is used to generate daily
and hourly  prices  based on  historical  price series and  volatility,  wherein
"price spikes", a recent phenomenon in the electricity markets, are modeled into
the price  series.  The VaR  calculated  by this model  represents  the  maximum
reduction in operating margin given a 95 percent  confidence  level.  This means
that  there is only a 5 percent  probability  that the  reduction  in  operating
margin from the expected margin will be greater than what is provided by the VaR
number. In this model, a sufficient  number of scenarios are generated,  whereby
each  scenario  simulates  a one-year  margin  (one-year  holding  period).  The
expected  margin is obtained by averaging  the margins  calculated  from all the
simulation scenarios. The VaR is obtained by sorting the simulation results from
the lowest to highest value and taking the 95th percentile worst case value.

                                       46
<PAGE>

        Since the new VaR methodology  was implemented  only at the beginning of
March 1999,  there is no comparable VaR number at December 31, 1998. The VaR for
the non-trading  portfolio at March 31, 1999 using a five-day  holding period is
$11.6 million.

        The overall IP electricity  portfolio is also controlled using quarterly
expected margin reduction  limits. In this process,  the difference  between the
current expected margin and last quarter's  expected margin is monitored against
the quarterly  limits.  To control "event risk",  IP measures the  "Stress-VaR",
i.e., the VaR calculated using assumptions similar to the events that led to the
electricity  price spikes in June 1998. The  "Stress-VaR"  is monitored  against
stress limits that were approved by the Board.

FOREIGN OPERATIONS RISK

        Illinova's  foreign  operations risk is its inherent risk of loss due to
the potential  volatility  of emerging  countries  and  fluctuations  in foreign
currency  exchange rates in relation to the U.S. dollar.  At March 31, 1999, IGC
had invested $169 million in several international operations, many of which are
joint  ventures.   Primarily,  these  investments  are  with  affiliates  owning
energy-related production, generation, and transmission facilities.

        IGC is exposed to  foreign  currency  risk,  sovereign  risk,  and other
foreign  operations risks,  primarily  through  investments in affiliates of $47
million in Asia and $119 million in South and Central America. To mitigate risks
associated with foreign currency fluctuations, the majority of contracts entered
into by IGC or its affiliates are denominated in or indexed to the U.S. dollar.


OTHER MARKET RISK

        Illinova  is  exposed  to equity  price risk  primarily  through  IP. IP
maintains  trust funds, as required by the NRC, to fund certain costs of nuclear
decommissioning. As of March 31, 1999, these funds were invested in domestic and
international  equity  securities,  fixed income  securities,  and cash and cash
equivalents.  By maintaining a portfolio that includes equity investments, IP is
maximizing the return to be used to fund nuclear  decommissioning,  which in the
long term will correlate better with inflationary  increases in  decommissioning
costs. The equity securities included in the corporation's portfolio are exposed
to price  fluctuations  in equity  market  risk as a result of  fluctuations  in
interest  rates.  IP  actively   monitors  its  portfolio  by  benchmarking  the
performance of its  investments  against  equity and  fixed-income  indexes.  It
maintains and periodically  reviews  established target allocations of the trust
assets  approved in the  investment  policy  statement.  VaR at March 31,  1999,
calculated  based on a 95 percent  confidence level and a one day holding period
follows:

- --------------------------------------------------------------------------------
(Millions of dollars)                               Value-at-Risk
- --------------------------------------------------------------------------------

IP                                                       $1.4
- --------------------------------------------------------------------------------

                                       47
<PAGE>

ITEM 6. Exhibits and Reports on Form 8-K

   (a)   Exhibits

         The Exhibits filed with this 10-Q/A are listed on the Exhibit Index.

   (b)   Reports on Form 8-K since December 31, 1998:

         Report filed on Form 8-K on February 12, 1999
                                 Item  7: Illinova announces continued
                                 work toward restarting Clinton Power
                                 Station and pursuit of negotiations
                                 with potential buyers.

         Report filed on Form 8-K/A on March 3, 1999
                                 Item 5, Other Events: Press release: Illinova
                                 releases 1998 year end earnings.
                                 Item 7, Exhibits: Illinova Consolidated
                                 Income Statements.

         Report filed on Form 8-K/A on April 19, 1999
                                 Item 5, Other Events: Press Release: Illinova
                                 Releases 1999 first quarter earnings,
                                 Announces expected sale of Clinton to AmerGen.
                                 Item 7, Exhibits: Illinova Consolidated
                                 Income Statements.

                                       48
<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.

                                                 ILLINOVA CORPORATION
                                                 (Registrant)



                                                 /s/Larry F. Altenbaumer
                                                 ---------------------------
                                                 Larry F. Altenbaumer
                                                 Senior Vice President,
                                                 Chief Financial Officer,
                                                 Treasurer and Controller
                                                 on behalf of
                                                 Illinova Corporation







Date:  May 17, 1999


                                       49
<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.

                                                 ILLINOIS POWER COMPANY
                                                 (Registrant)



                                                 /s/Larry F. Altenbaumer
                                                 ---------------------------
                                                 Larry F. Altenbaumer
                                                 Senior Vice President and
                                                 Chief Financial Officer
                                                 on behalf of
                                                 Illinois Power Company



Date:  May 17, 1999


                                       50
<PAGE>


EXHIBIT INDEX


                                                     PAGE NO. WITHIN
                                                   SEQUENTIAL NUMBERING
EXHIBIT            DESCRIPTION                            SYSTEM

  10             Material Contracts                      52 - 118

  27             Financial Data Schedule UT
                 (filed herewith)



                                       51
<PAGE>




                                              March 31, 1999





Mr. Charles Bayless
Chairman
Illinois Power Company
500 South 27th Street
Decatur, Illinois 62521

     Re: Interim Agreement Relative to the Clinton Nuclear Power Station

Dear Mr. Bayless:

         Reference is hereby made to that  certain  Agreement  between  Illinois
Power Company  ("IP") and PECO Energy  Company  ("PECO") dated as of January 15,
1998, as amended by that certain Incentive  Compensation  Agreement to Amend the
Management  Services  Agreement  dated  as of May 19,  1998  (collectively,  the
"Management Agreement"),  whereby PECO has been providing management services to
IP in connection  with the restart of IP's 930 MWE Clinton Nuclear Power Station
("Clinton").  PECO and IP have been in discussions concerning the possibility of
a sale or abandonment (hereinafter,  "sale") by IP of Clinton to PECO or AmerGen
Energy Company ("Buyer"),  a nuclear operating company owned by PECO and British
Energy.  The parties intend  promptly to negotiate a Definitive  Agreement which
will contain the definitive terms and conditions relative to the sale of Clinton
and additionally to negotiate  certain Ancillary  Agreements,  including a Power
Purchase Agreement ("PPA") and Interconnection  Agreement, which will be entered
into in connection  with the sale.  The purpose of this Interim  Agreement is to
(i) set forth certain  rights,  obligations and agreements of the parties during
the term of this Interim  Agreement,  (ii) provide for certain amendments to the
Management  Agreement  which are set forth in an Amendment No. 2 effective April
1, 1999, to be executed by IP and PECO in the form attached hereto as Exhibit A,
(iii)  provide for the  execution by IP. PECO and the  designated  Chief Nuclear
Officer  of  Clinton  of a Leased  Employee  Agreement  of even date in the form
attached  hereto as Exhibit B, (iv) provide for the  modification by the parties
of the Confidentiality Agreement dated March 12, 1999 attached hereto as Exhibit
C, to  provide  for an  extension  of the  Exclusivity  Period as  described  in
Paragraph 4 hereof,  and (v) to  establish  certain  business  points which will
guide the parties in their negotiation of the Definitive Agreement.

         1.    Negotiation of Definitive Agreement and Ancillary Agreements

            This  Interim  Agreement  shall  become  effective  on the date (the
"Effective  Date") that this  Interim  Agreement is ratified and approved by the
Board  of  Directors  of  IP.  Following  the  Effective  Date  and  during  the
Exclusivity  Period, IP and the Buyer shall use their respective best efforts to
negotiate the  Definitive  Agreement and all Ancillary  Agreements  necessary or
desirable to complete and provide for the sale of Clinton by IP to Buyer.  Buyer
is completing due diligence of Clinton, and IP is making available to Buyer such
<PAGE>

information, including confidential information, as Buyer has to date reasonably
requested.  The  parties  will  endeavor  to  complete  the  negotiation  of the
Definitive  Agreement and Ancillary Agreements during the Exclusivity Period but
the  parties  will have no  obligations  to each  other  except as  specifically
provided for in this  Interim  Agreement,  the  Confidentiality  Agreement,  the
Management  Agreement  as  amended  by  Amendment  No. 2 thereto  and the Leased
Employee  Agreement,  and as  may  hereinafter  be  provided  by the  Definitive
Agreement and the Ancillary  Agreements.  Without in any way binding the parties
hereto (the parties being bound with respect to these matters only to the extent
and as provided for in the Definitive  Agreement as may hereafter be executed by
the  parties),  it is intended that the  Definitive  Agreement and the Ancillary
Agreements  thereto  will  reflect the  following  business  points  between the
parties  as such  business  points  may be  amplified  or  supplemented  through
negotiation  of the  parties  and set  forth  in the  Definitive  Agreement  and
Ancillary Agreements:

            (a)   Purchase Price

            At the closing of the sale of Clinton under the Definitive Agreement
(the "Closing"),  which Closing shall be within ten (10) days after satisfaction
or  waiver  of all  conditions  precedent  to the  Closing,  Buyer  will  pay IP
$20,000,000  for  all of  IP's  right,  title  and  interest  in and to  Clinton
including all IP equipment, spare parts, fixtures,  inventory,  nuclear fuel and
other  property of any kind  necessary  for the  operation  and  maintenance  of
Clinton. IP has indicated that it desires to exclude from the sale certain lands
and  facilities  which are not  necessary  for the safe,  efficient and economic
operation of Clinton.  The  Definitive  Agreement  shall identify the particular
portions of the  Clinton  site and  facilities  which IP and Buyer agree will be
excluded from the sale,  subject to  appropriate  conditions to meet  regulatory
requirements.  Buyer  shall  have  the  right  to  contract  for  any  necessary
transmission  service under IP's Open Access Transmission Tariff and for back-up
power to the site consistent with NRC requirements and current arrangements.

            (b)   PPA

            Ancillary to the  Definitive  Agreement  will be a PPA providing for
IP's  purchase  of energy  from  Clinton  for the period  from  Closing  through
December  31,  2004.   In  addition  to  such  other   terms,   conditions   and
amplifications  the parties may  negotiate,  the PPA will reflect the  following
basic understandings:

          IP will  purchase and the Buyer will deliver to IP on an  as-available
(or Unit  output)  hourly  basis the  following  percentages  of the  actual net
electric output of Clinton:

             Year      1999      2000      2001      2002      2003      2004
          % output      80        xx        xx        xx        xx        xx

          IP will pay for such output  (with  pricing  reflecting  all  charges,
including energy and capacity) at the following general price levels,  provided,
however,  that such  prices  will be  modified  by mutual  agreement  to reflect
seasonality  (canted to strongly  incentivize  the Buyer to  maximize  output at
Clinton  during the summer  months) and "on" and "off" peak periods on an hourly
basis:

              Year     1999      2000      2001      2002      2003      2004
     Price per MWH     $xx       $xx       $xx       $xx       $xx       $xx
<PAGE>

          (c)   Decommissioning Liability

          At the Closing,  IP will make or cause to be made such additional cash
deposits  as  are   necessary  to  the  Clinton   Qualified   and   Nonqualified
Decommissioning  Trusts  (together  with any other trusts into which the current
trusts may be  liquidated  or the current  trust funds may be  transferred,  the
"Decommissioning  Trusts") in order to ensure that the  liquidated  value of the
aggregate  trust  corpus  of  the  Decommissioning   Trusts  is  not  less  than
$95,000,000.  On each of the next six (6) anniversary  dates of the Closing,  IP
wil  deposit  or  cause  to be  deposited  an  additional  $30,000,000  in  such
Decommissioning  Trusts  subject  to the  NRC  approval  of such  funding  as an
acceptable  method of  demonstrating  reasonable  assurance  of such  funding in
accordance  with  10 CFR  ss.50.75  (e)(v)  and  IP  providing  such  additional
assurance  of payment as may be mutually  agreed to by IP and Buyer.  IP and the
Buyer shall  cooperate in obtaining  federal and state approvals to permit these
additional  contributions  to be made to the  Qualified  Trust  contained in the
Decommissioning  Trusts to the maximum  extent  practicable.  The parties intend
that  to  the  extent   practicable   the  Buyer   will  take   control  of  the
decommissioning  funds,  but in any event the parties  agree that neither IP nor
any of its affiliates will have any liability following the Closing with respect
to the  decommissioning  of Clinton  except to the extent of the  aforementioned
funding  of the  Decommissioning  Trusts  at the  time of the  Closing  and IP's
liability to make the six (6) anniversary payments following the Closing. Except
as set forth in the immediately preceding sentence, at Closing Buyer will assume
and be responsible for all other  liability with respect to the  decommissioning
of Clinton.  It will be a  condition  to the  Closing  that  either  through the
receipt of  favorable  rulings  from the Internal  Revenue  Service,  changes in
existing tax law and/or the regulations  thereunder or other circumstances,  the
Buyer  is  satisfied  that  the  transfer  of  the  assets  represented  by  the
Decommissioning  Trusts on a tax-free or tax-efficient basis can be accomplished
and that the maintenance of the Qualified and Nonqualified Decommissioning Trust
funds post-Closing can be accomplished without negative tax implications for the
assets of the  Decommissioning  Trusts  or the  Buyer.  Similarly,  it will be a
condition to Closing that IP must be satisfied  that any chosen  structure  will
neither result in adverse tax  consequences  to IP (such as, but not limited to,
inability  to deduct its payments  into the  Decommissioning  Trusts,  increased
amounts realized on the sale or other income recognition which are not offset by
deductions or losses, its inability to collect its  decommissioning  tariff from
the Illinois taxpayers on a tax effective basis, or a recapture of the Qualified
or Nonqualified Decommissioning Trusts) nor jeopardize IP's legal entitlement to
continue to collect such  decommissioning  tariff in no less than the  aggregate
amounts now envisioned under such tariff.

          (d)   Spent Fuel Fees

          IP will  continue  to pay or cause to be paid all spent fuel  disposal
fees now in effect or  subsequently  imposed for nuclear  fuel burned at Clinton
prior to Closing. On and after the Closing,  Buyer will assume the liability for
payment of all spent fuel  disposal  fees for fuel  burned on or  subsequent  to
Closing.  Fuel burned shall be determined by electricity generated in accordance
with Department of Energy Regulations.

          (e)   Decommissioning and Decontamination Fee
<PAGE>

          IP will  continue  to pay or  cause  to be paid to the  Department  of
Energy the annual  decontamination  and  decommissioning  fees  associated  with
Clinton fuel enriched and burned prior to the Closing.

          (f)   Insurance

          IP will  maintain in effect until the Closing  substantially  the same
level of property damage and liability  insurance for Clinton as is currently in
effect. As of the date of Closing,  IP shall retain all rights to (i) its member
insurance accounts in Nuclear Electric Insurance Limited ("NEIL"),  and (ii) its
future nuclear  insurance  distributions and credits from both NEIL and American
Nuclear Insurers ("ANI") including,  but not limited to, shutdown credits earned
by IP through the date of Closing.  Alternatively,  upon mutual agreement of the
parties,  IP shall transfer its rights referenced in clauses (i) and (ii) of the
immediately preceding sentence to Buyer at the Closing,  subject to the approval
of NEIL and/or ANI, if required,  in return for a lump sum payment from Buyer to
IP in an amount to be mutually agreed upon by the parties.

          (g)   Employees

          As of the  Closing,  Buyer will employ  consistent  with its  business
needs the IP  employees  then  working at Clinton and those fully  dedicated  to
Clinton  who are on  Clinton's  budget and  payroll  and Buyer will be given the
opportunity,  subject  to  agreement  by  IP  and  Buyer  as to  the  particular
individuals  involved,  to offer  positions to IP  headquarters  staff whose job
responsibility  is to provide  support for  Clinton.  Buyer will  recognize  the
unions which currently represent employees at Clinton and will adopt pension and
other employee benefit plans and  arrangements for Clinton  employees which will
provide  substantially  similar benefits to such employees  retained by Buyer as
such  employees  would receive under IP's plans and programs in effect as of the
date of Closing. IP and Buyer shall agree in the Definitive Agreement to develop
a transition  plan in  accordance  with Sections  16-128 of the Illinois  Public
Utilities  Act to be offered to  employees  of  Clinton  prior to and  following
Closing. IP will be responsible for implementing and funding the transition plan
for employees at Clinton who are not  transferred to (employed by) Buyer and for
applicable  severance  obligations owing to any transferred  employees  lawfully
terminated  (except for cause) by Buyer during the twenty-four (24) month period
following Closing.  Following its employment of the employees  referenced above,
the Buyer will  comply with the  provisions  of Section  16-128 of the  Illinois
Public  Utilities  Act. As soon as  practicable  following the Closing,  IP will
transfer or cause to be transferred to defined  contribution  plans  established
and/or already maintained by the Buyer an amount equal to the assets (including,
but not limited to,  promissory notes  evidencing loans from IP's  corresponding
defined  contribution plans to transferred  employees that are outstanding as of
the  transfer  date)  representing  the  account  balances  of  all  transferred
employees. This transfer will be done in the most practical and effective method
in order to ensure  compliance  with the Internal  Revenue Code and the Employee
Retirement Income Security Act. As soon as practicable after the Closing, Seller
shall cause to be transferred from Seller's pension and welfare benefit plans to
Buyer or its affiliates an amount (the "Benefit Assets  Transfer  Amount") equal
to the total of (i) an amount to be mutually  agreed  upon by the parties  based
upon the projected costs to cover pension benefit  obligations owing to Seller's
transferred employees,  (ii) an amount to be mutually agreed upon by the parties
equal to the value of  retiree  medical  and life  insurance  benefits  for each
transferred  employee  accrued through the date immediately  preceding  Closing,
less (iii) any payment  made to or in respect of any  transferred  employee  who
<PAGE>

retires or otherwise  terminates  employment with Buyer after Closing and before
the date of the transfer of such assets. With respect to the preceding sentence,
a dollar for dollar  adjustment to the purchase price shall be made in the event
that compliance with applicable law results in the actual assets  transferred to
Buyer being  different  than the assets that would have been  transferred if the
asset  calculation were undertaken using mutually approved  long-term  actuarial
assumptions, including, but not limited to, long-term trust earnings.

          (h)   Approvals

          The  Definitive  Agreement  will  contain  provisions  which  make the
Closing subject,  among other things, to receipt of all necessary federal, state
and local regulatory  approvals as well as the expiration of applicable  waiting
periods under the Hart-Scott-Rodino  Antitrust Improvements Act. These approvals
must contain no terms or conditions  which would cause a material adverse effect
on the value of  Clinton  or on the cost of the  transaction  to IP and shall be
otherwise  reasonably  satisfactory  to the parties.  The parties will cooperate
with each other and use their  respective  best efforts to obtain the  necessary
regulatory  approvals as promptly as practicable  following the execution of the
Definitive Agreement.

          (i)   Closing Conditions

          The Definitive Agreement shall contain provisions which condition each
party's  obligation to proceed with the Closing on all Closing conditions having
been satisfied or waived by the appropriate party within eighteen (18) months of
the execution of the Definitive  Agreement.  A further condition to Closing will
be the  requirement  that Clinton has at any instant in time subsequent to March
15, 1999 and on or before December 31, 1999 actually  generated  electric energy
and been  synchronized  to the grid.  In  addition  to such  Closing  conditions
described  herein,  the Definitive  Agreement will contain such further  Closing
conditions as are negotiated by the parties.

          (j)   Environmental Matters

          To the extent that IP has not  already  conducted  or had  conducted a
Phase I environmental  site assessment  reasonably  satisfactory to Buyer of the
Clinton land and facilities to be transferred, Buyer may, at its expense, have a
Phase I and/or Phase II environmental site assessment conducted by environmental
consultants  mutually  agreeable  to IP and  Buyer to  identify  any  recognized
environmental condition for which a release notification would be required to be
made to any state or federal agency having  jurisdiction  or which would pose an
imminent or substantial  endangerment to human health or the  environment  under
applicable  environmental laws. IP and Buyer shall mutually agree on (i) whether
any remediation is necessary with respect to any such  recognized  environmental
conditions, (ii) what type of remediation should be performed, if any, and (iii)
who will  conduct  such  remediation.  IP shall cause any  mutually  agreed upon
remediation  to be  performed  prior to  Closing,  or IP shall  pay to Buyer the
estimated  cost for any  uncompleted  mutually  agreed upon  remediation or make
appropriate  arrangements  to  indemnify  Buyer  therefor.  From and  after  the
Closing,  Buyer  shall  assume,  and shall  indemnify  IP with  respect  to, all
environmental liabilities and obligations at the site; provided however, that IP
shall indemnify Buyer for environmental  liabilities arising from waste disposal
or treatment of waste at the site or other waste disposal activities of IP which
occurred off-site prior to Closing.
<PAGE>

          (k)   Property Tax

          The  Definitive  Agreement  will  provide  for (i) the  allocation  of
property taxes on the basis of the percent of the tax year that Clinton is owned
by IP and the Buyer,  and (ii) the allocation of transfer taxes on a 50-50 basis
between IP and Buyer.

          2.    Publicity

         The parties must mutually agree on any news release, press statement or
other public  announcement  relating to this  Interim  Agreement or the proposed
sale of  Clinton  to the  Buyer,  which  agreement  in either  case shall not be
unreasonably  withheld  or  delayed,   except  either  party  may  disclose  the
transaction  to the  extent it is advised by  counsel  that such  disclosure  is
required under applicable regulatory provisions, securities laws or the rules of
the New York  Stock  Exchange.  Notwithstanding  the  foregoing,  no party  will
disclose the existence of this Agreement prior to the Effective Date,  except as
otherwise provided in Paragraph 6 herein.

          3.    Transaction Costs

         Each party shall bear its own costs  related to this  Agreement and the
agreements   exhibited  herein,  the  Definitive  Agreement  and  the  Ancillary
Agreements,  to  the  provision,   receipt  and  examination  of  due  diligence
materials,  and to any other  transaction  costs,  including  the cost of legal,
technical and financial consultants and the cost of any necessary or appropriate
regulatory  filings  and/or  prosecuting  applications  for required  regulatory
approvals, except as may otherwise be provided in the Definitive Agreement.

          4.    Exclusivity

         Buyer shall have the exclusive  right to negotiate with IP for the sale
of  Clinton  during  the  Exclusivity  Period to the  extent  and in the  manner
provided  for  in  paragraph  10 of  the  Confidentiality  Agreement;  provided,
however, that the Exclusivity Period shall continue in effect from the execution
of this Agreement until the execution of a Definitive Agreement or 5:00 p.m.
Decatur, Illinois time June 15, 1999, whichever first occurs.

          5.    Other Agreements

         Concurrently  with  the  execution  of  this  Interim  Agreement,   the
appropriate  parties will execute and deliver to each other  Amendment  No. 2 to
the Management  Agreement and the Leased Employee  Agreement  (together with the
Confidentiality Agreement, as modified hereby, the "Other Agreements").

          6.    Regulatory Filings: Cooperation

         At the time of the  execution  of this Interim  Agreement,  the parties
hereto  will  confer as to  whether  this  Interim  Agreement,  any of the Other
Agreements or the  transactions  to be implemented  under any of them require or
make  advisable  (i)  the  filing  of  any  documents,   notices,   requests  or
<PAGE>

applications  for  approval  with any  state,  local or  federal  government  or
regulatory  agency,  and/or (ii) the appearance  before or personal contact with
the appropriate personnel at any such governmental body or agency. To the extent
that any of the  foregoing  is  determined  by the  parties to be  necessary  or
advisable,  the parties will cooperate with one another and use their respective
best efforts to initiate and complete such  necessary or  appropriate  action in
the most effective and prompt fashion practicable.

          7.    Term

         If the  Definitive  Agreement is executed by the parties  prior to June
15, 1999, this Interim Agreement will terminate upon the earlier to occur of the
date of the Closing or the effective  date of the  termination of the Definitive
Agreement,  unless the Definitive Agreement otherwise provides.  Otherwise, this
Interim Agreement will terminate at midnight on December 31, 1999.

          8.    Governing Law

         This Interim Agreement shall be governed by, and construed, interpreted
and  enforced in  accordance  with,  the laws of the State of  Illinois  without
regard to the conflict of law provisions thereof.

          9.    No Waiver: Amendment

         No failure  or delay by any of the  parties  in  exercising  any right,
power or privilege  hereunder shall operate as a waiver  thereof,  nor shall any
single or  partial  exercise  thereof  preclude  any other or  further  exercise
thereof or the exercise of any other right, power or privilege  hereunder.  This
Interim  Agreement  shall not be modified,  supplemented  or amended except by a
writing signed by all parties hereto.



<PAGE>


                                                   Sincerely,

                                                   PECO Energy Company



                                                   By:_________________________
                                                      Paul E. Haviland
                                                      Vice President


                                                   AmerGen Energy Compay



                                                   By:_________________________
                                                      Name:____________________
                                                      Title:___________________



Agreed to and accepted:

ILLINOIS POWER COMPANY



By: /s/David W. Butts
  --------------------------
   Name:  David W. Butts
   Title: Sr. Vice President




<PAGE>


                                                                       Exhibit A


                                 AMENDMENT NO. 2


         THIS AMENDMENT AGREMENT (the "Amendment") is made and entered into this
31st  day of  March,  1999,  to be  effective  as of the  "Effective  Date"  (as
hereinafter  defined),  by  and  between  PECO  ENERGY  COMPANY, a  Pennsylvania
corporation  ("PECO"),  and  ILLINOIS  POWER  COMPANY,  an Illinois  corporation
("IP").

         WHEREAS,  PECO and IP entered into that certain  Agreement  dated as of
January 15, 1998, as amended by that certain Incentive Compensation Agreement to
Amend the Management Services Agreement dated as of May 19, 1998 (the "Incentive
Compensation  Amendment"),  the terms of which  are  incorporated  by  reference
herein  (such  Agreement  as so amended  being  hereinafter  referred  to as the
"Management Agreement");

         WHEREAS, the Management Agreement provides for the provision of certain
management  services  by PECO to IP in support of outage  recovery  efforts  and
operation of IP's Clinton Power Station ("CPS");

         WHEREAS,  IP, PECO and AmerGen Energy Company  ("AmerGen") have entered
into an Interim Agreement of even date herewith (the "Interim Agreement") (which
Interim  Agreement  shall  become  effective on the date that it is ratified and
approved  by  the  Board  of  Directors  of  IP  (the  "Effective   Date")),  in
anticipation  among  other  things of (i) PECO's or  AmerGen's  purchase  of CPS
(pursuant  to the  terms  and  conditions  of a  to-be-negotiated  and  executed
definitive  asset purchase  agreement (the  "Definitive  Agreement")) and (ii) a
revised fee  arrangement  under the  Management  Agreement and the assumption of
certain O&M and capital costs relative to CPS by PECO; and

         WHEREAS,  the parties hereto desire to amend the Management  Agreement,
effective as of the  Effective  Date, in the manner set forth herein to provide,
among other things, for changes in the compensation for PECO's management of CPS
during the period  that the  Interim  Agreement  is in effect,  or as  otherwise
provided for in the Definitive Agreement;
<PAGE>

         NOW,  THEREFORE, FOR AND IN  CONSIDERATION  OF the mutual  promises and
covenants hereinafter set forth, and other good and valuable consideration,  the
receipt and  sufficiency  of which are hereby  acknowledged,  the parties hereto
agree as follows:

1. The Management  Agreement is hereby amended by deleting the seventh  sentence
of Article  3.1.1 in its  entirety and  inserting in lieu thereof the  following
sentence:

         The Parties recognize and agree that notwithstanding any duties the CNO
         will  have  by  virtue  of  his  position  in IP,  the  CNO  may  share
         information  regarding  Clinton  Power  Station  with PECO  management,
         including information regarding plant status, plant condition, budgets,
         future needs for repairs, replacements,  modifications and costs, plant
         staff  performance,  labor  relations,  regulatory  issues,  and  local
         conditions and issues; provided,  however, that in no event may the CNO
         disclose  information to PECO  management (i) which is privileged to IP
         (including  but  not  limited  to  the  attorney  client  communication
         privilege and work product  doctrine),  or (ii) the disclosure of which
         would  constitute  a  breach  of  a  confidentiality  or  nondisclosure
         agreement  to which IP is bound with  another  party or a violation  of
         law;  provided  further  that any  information  shared by CNO with PECO
         management shall be subject to the non-disclosure provisions of Article
         15 of this Agreement and to the terms of the Confidentiality  Agreement
         among IP, PECO and AmerGen  Energy  Company  dated March 12,  1999,  as
         amended from time to time, which is incorporated by reference herein.

2. The  Management  Agreement is hereby  amended by deleting  Articles 5.1, 5.2,
5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 5.10,  5.11,  5.12,  Attachments A and B, and
Article  3 of  the  Incentive  Compensation  Amendment  in  their  entirety  and
inserting in lieu thereof the  following  Articles 5.1, 5.2, 5.3, 5.4, 5.5, 5.6,
5.7, 5.8, 5.9, 5.10 and 5.11 which read in their entirety as follows:

         5.1   Direct Operating and Maintenance and Capital Costs Reimbursement

         Commencing  as of April 1,  1999,  PECO  shall be  responsible  for the
         payment of all  direct  operating  and  maintenance  ("O&M")  costs and
         direct  capital costs  incurred by IP and allocable to the operation of
         CPS. The specific  categories  of such O&M and capital  costs for which
         PECO shall be  responsible  are set forth on  Attachments  A.1, A.2 and
         A.3,  respectively,   which  Attachments  are  incorporated  herein  by
         reference.  The Parties  will confer with each other to ensure that the
         categories  of  costs  set  forth  on  Attachments  A.1,  A.2  and  A.3
         constitute reimbursable direct O&M and capital costs of IP allocable to
         the  operation  of CPS.  Notwithstanding  the  foregoing  prior  to the
         scheduled November,  1999 purchase of fuel, IP will confer with PECO as
         to the timing of such  purchase and the  treatment of such  purchase if
         the Closing under the  Definitive  Agreement  does not occur.  IP shall
<PAGE>

         remain responsible for all other costs attributable to the operation of
         CPS,  including,  for  example:   pension,  benefits  and  payroll  tax
         payments; real property taxes; DOE spent fuel fees; DOE decommissioning
         and  decontamination  fees,  if  any;  and  contributions  to  the  CPS
         decommissioning trust funds.

         IP shall submit to PECO invoices for each calendar month  detailing all
         O&M and capital  costs  incurred or accrued by IP with  respect to such
         month  and  reimbursable  or  payable,  as the  case  may  be,  by PECO
         hereunder.  Within  fifteen (15) days of receipt of such invoice,  PECO
         shall by wire transfer pay the invoiced amount, subject to PECO's right
         to dispute the invoice pursuant to Article 5.7. Other than as expressly
         provided in such Article 5.7, such payments are non-refundable.

         Invoices to PECO will be submitted to:

                  Charles P. Lewis
                  PECO Nuclear
                  965 Chesterbrook Boulevard
                  Wayne, Pennsylvania 19087
                  Fax No.:

and may,  at IP's  election,  be  submitted  by first  class or  priority  mail,
courier, fax or hand delivery.

         5.2   PECO Management Fee

         Commencing  as of April 1, 1999,  in  consideration  for all  services,
         payments  and  reimbursements  provided  by PECO under this  Agreement,
         including  without  limitation  the  On-Site  Management  Services  and
         Additional  Services,  and in  lieu  of any  and  all  other  fees  and
         incentive  payments accrued as of, or otherwise payable after, April 1,
         1999,  IP shall,  in addition to the  provision  of electric  energy as
         provided in Article 5.3, pay as provided in the next  paragraph to PECO
         a management fee  ("Management  Fee") of $xx.xx for each  megawatt-hour
         ("Fee Hour") of electric energy contained during the period  commencing
         April 1, 1999 and ending  December 31, 1999 in the Net Electric  Output
         of CPS after subtracting therefrom the Electric Output Entitlement,  as
         such terms are  defined in Article  5.3.  For months  commencing  after
         December 31, 1999, the  Management  Fee shall be calculated  consistent
         with the pricing  provided  for in the Power  Purchase  Agreement to be
         negotiated  in  connection  with (and  attached  as an Exhibit  to) the
         Definitive Agreement.

         Commencing  with the month  immediately  following  the first  calendar
         month after March 1999 that CPS generates Net Electric  Output which is
         measurable,  IP will by the last day of each  month  provide  to PECO a
         statement  setting  forth  the  Net  Electric  Output  of CPS  for  the
         preceding  month along with a calculation  of the  Management Fee based
         thereon and shall  concurrently  make payment of such  indicated fee to
         PECO by wire transfer. PECO shall be entitled to dispute such statement
         in accordance Article 5.7 hereof.

         5.3   PECO Entitlement to Electric Output
<PAGE>

         As  additional   consideration  for  On-Site  Management  Services  and
         Additional  Services provided by PECO, IP shall be obligated to deliver
         to PECO 20% of the Net Electric Output of the CPS (the "Electric Output
         Entitlement"),  if any,  generated  after March 31, 1999 during term of
         this Agreement.  For purposes of determining the amount of the Electric
         Output  Entitlement  to be delivered  to PECO  pursuant to this Article
         5.3, the Net Electric Output of CPS shall be defined as follows:

                  [Within  fifteen (15) business days following the execution of
                  this  Amendment,  the Parties shall  negotiate a supplement to
                  this  Amendment  pursuant to which the Parties  shall agree on
                  procedures  for  calculating  the Net  Electric  Output of CPS
                  prior  to and  following  installation  of  the  revenue-grade
                  metering discussed in the following paragraph,  as well as the
                  metering points necessary to calculate the Net Electric Output
                  and Station Service Energy.]

         The Parties recognize and agree that the current metering equipment and
         system  at  the  CPS  (the  "Metering   System")  is  not  optimal  and
         modifications  to improve the Metering  System are needed.  The Parties
         shall mutually agree upon the  modifications  and upgrades  required to
         convert the Metering System to the level of  revenue-grade  metering as
         well as how the  costs  of such  modifications  and  upgrades  shall be
         allocated between the Parties.

         PECO  shall  be  notified  of  and  shall  have  the  right  to  have a
         representative   present   at   any   test,   inspection,   adjustment,
         maintenance,  installation  or  replacement of any part of the Metering
         System performed by IP or its agents.  IP will test the Metering System
         for accuracy at least once each year. In addition, IP will also conduct
         a test, at any time within thirty (30) business days after a request by
         PECO,  if  PECO  reasonably   believes  that  the  Metering  System  is
         inaccurate   by  more  than  two   percent   (2%).   PECO  may  have  a
         representative  present  during  all  testing.  The costs of such tests
         requested  by PECO shall be borne  one-half  by PECO an one-half by IP;
         provided,  however, that if a test requested by PECO indicates that the
         Metering System is accurate to within two percent (2%), PECO shall bear
         the full costs of such test.

         IP shall be responsible for delivery of the Electric Output Entitlement
         to the Delivery Point and shall have no obligation,  responsibility  or
         liability for making arrangements for or the costs for the transmission
         of the Electric Output Entitlement beyond the Delivery Point, including
         but not  limited  to,  transmission  and  ancillary  service  costs and
         congestion  costs.  IP  shall  provide  for  transmission   service  in
         accordance with IP's Open Access  Transmission  Tariff on file with the
         FERC.

         The Electric  Output  Entitlement  shall be unit  specific from the CPS
         and,  except as expressly set forth above,  IP shall have no minimum or
         maximum  delivery   obligations  over  any  time  period.   If  CPS  is
         unavailable  in whole or in part, IP shall have no obligation to supply
         back-up energy to PECO.

         The  transaction  contemplated  by IP and PECO in this Section 5.3 is a
         wholesale  power sale for resale  pursuant to IP's Power  Sales  Tariff
         (the  "PS  Tariff")  on  file  with  the  Federal   Energy   Regulatory
         Commission.  IP and PECO have previously  executed a "Form of Agreement
<PAGE>

         for Electric Service" pursuant to the PS Tariff, dated as of October 3,
         1996. IP and PECO desire for this transaction to occur pursuant to this
         Form of Agreement for Electric Service.

         Other than as provided for in this Article 5.3 and in Article 5.2, PECO
         shall not be  entitled  to receive  from IP any other  compensation  or
         payment  for, or in respect of, any  services or  performance  rendered
         under this Agreement.

         5.4   Billing Estimates and Adjustments

         If either Party renders an invoice or statement on an estimated  basis,
         any  adjustment  to such  invoice  or  statement  shall  be made in the
         subsequent month's invoice or statement,  as appropriate.  Each invoice
         or statement  shall be subject to adjustment  for errors in arithmetic,
         computation, meter readings, or other errors, until twelve months after
         the date each respective invoice or statement was rendered.

         5.5   Record Retention and Audit Rights

         IP and PECO shall both keep complete and accurate records and all other
         data   required   by  either  of  them  for  the   purpose   of  proper
         administration  of the  Agreement,  including  such  records  as may be
         required by state or federal regulatory  authorities.  All such records
         shall be maintained  for a minimum of five (5) years after the creation
         of the record or data and for any additional length of time required by
         state or federal  regulatory  agencies  with  jurisdiction  over IP and
         PECO. IP and PECO, on a  confidential  basis as provided for in Article
         15 of this Agreement,  will provide  reasonable  access to the relevant
         and  appropriate  financial and operating  records and data kept by the
         other  relating to this  Agreement  necessary  for such Party to comply
         with its  obligations to federal and/or state  regulatory  authorities,
         through  the use of a mutually  agreed upon third  party  auditor.  The
         Party  seeking  access to such records in this manner shall pay 100% of
         the fees and expenses associated with use of the third party auditor.

         5.6  Late Payment

         If either IP or PECO fails to pay any  amount due under this  Agreement
         in full, when due, then such Party shall be required to pay interest on
         the unpaid or late amount, which shall accrue from the date payment was
         due through the date payment is made at a daily rate equal to the lower
         of (a) the highest  daily prime  interest  rate  published  in the Wall
         Street Journal on the date of, or the next business day following,  the
         invoice  due  date,  or  (b)  the  highest  daily  rate  allowed  under
         applicable law. Any over-payments or under-payments shall bear interest
         as provided  above and shall be  assessed  from the time of the over or
         under payment to the date of the refund or payment thereof.

         5.7   Disputed Invoices or Statements

         Management  Fees and O&M/capital  costs payable  hereunder shall not be
         subject  abatement  or setoff  and  shall be paid in full when due.  If
         either Party  disputes an invoice or statement or any part thereof,  it
         nevertheless  shall make the  payment  due in full but may  dispute the
         invoice or statement in the manner  prescribed  in Article 12, but only
<PAGE>

         if Notice of such  dispute is provided  to the other  Party  within one
         year of the date of the invoice or statement.

         5.8   Proration

         If this Agreement is terminated  effective on a day other than the last
         day of a calendar  month,  the  Management  Fee,  O&M costs and capital
         costs due for that month hereunder shall be prorated based on the ratio
         of the number of days of such month that this Agreement is in effect to
         the total number of days in such month.

         5.9   Payment by Wire

         Unless  otherwise  specified  in writing by the  receiving  Party,  all
         payments  made  under  this  Agreement  shall  be by wire  transfer  of
         immediately  available funds to a bank account  specified in writing by
         PECO or IP,  respectively,  and in  accordance  with  the  instructions
         provided by each Party.

         5.10  Taxes

         Any and all taxes, fees and assessments based on the payment or receipt
         of Management Fees or the Electric Output Entitlement,  whether paid in
         cash or power,  shall be borne by PECO. PECO, at its own expense,  will
         file  any  documentation  required  by  governmental  authorities  with
         respect to such payment or receipt of  Management  Fees or the Electric
         Output Entitlement.

         5.11  Separation Costs

         Except  as may be  otherwise  provided  in  the  Definitive  Agreement,
         separation  agreements  with  any IP  employee,  or any  PECO  employee
         providing services pursuant to this Agreement,  who is outplaced during
         the term of this Agreement  shall be the sole financial  responsibility
         of the  employing  Party,  either IP or PECO, as the case may be, or as
         specified in any Leased  Employee  Agreement  among the Parties and any
         employee.

3. The  Management  Agreement  is hereby amended by deleting  Article 7.2 in its
entirety and inserting in lieu thereof the following Article 7.2, which reads in
its entirety as follows:

         7.2   Limit on PECO Liability

         PECO's  aggregate   liability  to  IP,  exclusive  of   indemnification
         obligations,  arising out of this Agreement or the performance  thereof
         in any calendar year,  whether  arising in contract,  tort or otherwise
         (including  strict  liability),  shall not  exceed  the  greater of (a)
         $20,000,000.00, or (b) the aggregate fees paid to PECO by IP under this
         Agreement  for all  periods  prior to April 1, 1999 plus the product of
         $10.00 multiplied by the aggregate number of Fee Hours against which IP
         has paid Management Fees to PECO.
<PAGE>

4. The Management  Agreement is hereby  amended by deleting  Article 11.1 in its
entirety and inserting in lieu thereof the following  Article 11.1,  which reads
in its entirety as follows:

         11.1  Termination Without Cause

               This  Agreement  shall  terminate  on the  date  of  the  Closing
         pursuant to the Definitive  Agreement  contemplated  by the Parties for
         the sale of CPS to PECO. In the event of the termination of the Interim
         Agreement  without  the  Parties  having  entered  into and  executed a
         Definitive  Agreement,  this  Agreement  will terminate on December 31,
         1999.  In the event that a  Definitive  Agreement  is entered  into and
         executed by the Parties,  but is  terminated  without a Closing for the
         sale of CPS, then this  Agreement  will terminate on the later to occur
         of (i) December 31, 1999, or (ii) the effective  date of termination of
         the  Definitive  Agreement.  At  any  time  after  termination  of  the
         Exclusivity  Period as  described in the Interim  Agreement  and unless
         otherwise  provided  in  the  Definitive  Agreement,  if  any,  IP  may
         terminate  this  Agreement  by  providing  180 days  written  Notice of
         termination to PECO, such termination to be effective as of the date of
         the Notice or, upon mutual  agreement of the  Parties,  as of any other
         date.  Except as provided in Article  20.10,  termination in accordance
         with  this  Article  11.1  shall   discharge   both  Parties  from  all
         obligations  and  duties  under  this  Agreement  that have not  become
         payable as of the effective date of termination.  Upon the provision of
         a Notice of  termination  pursuant to this Article  11.1,  or beginning
         September  1, 1999,  in the event that a Definitive  Agreement  has not
         been executed,  the Parties shall work in good faith to provide for the
         expeditious   replacement   of  PECO   personnel   and   transition  of
         responsibility and work in progress in a safe and orderly manner,  with
         the actual length of transition  to be  established  by IP. The Term of
         this Agreement shall extend until the effective time of any termination
         thereof pursuant to this Article 11.

5. The Management Agreement is amended by deleting Article 18 in its entirety.

6. The Management  Agreement is hereby amended by deleting  Article 20.15 in its
entirety and inserting in lieu thereof the following Article 20.15,  which reads
in its entirety as follows:

         20.15  Employee Status

         Except as otherwise  provided in the Definitive  Agreement,  during the
         term of this Agreement and for a period of eighteen months  thereafter,
         PECO shall not,  directly or indirectly,  initiate offers of employment
         or hire any IP employees,  without IP's prior written  consent.  During
         the  term of  this  Agreement  and  for a  period  of  eighteen  months
         thereafter,  IP shall not,  directly or indirectly,  initiate offers of
         employment  or hire any  personnel  employed  by PECO who has  provided
         On-Site  Management  Services or Additional  Services,  without  PECO's
         prior written consent.
<PAGE>

7.    Except as provided in paragraphs 1, 2, 3, 4, 5 and 6 above, the Management
      Agreement shall remain in full force and effect.

8.    Miscellaneous

     (a) This Amendment Agreement and the Management Agreement as amended hereby
constitutes  the  complete  understanding  of the  Parties  with  respect to the
subject matter set forth herein, and shall supersede any prior  understanding or
agreement to the contrary,  written or oral, and may not be amended,  altered or
discharged unless in a writing signed by the Parties hereto.

     (b) This  Amendment  shall be governed by and construed in accordance  with
the laws and decisions of the State of Illinois.



<PAGE>


     IN WITNESS WHEREOF,  the parties have caused this Amendment to be executed
by their duly authorized officers.

                                                   ILLINOIS POWER COMPANY
                                                   "IP"



                                                   By:/s/David W. Butts

Witness:
/s/Kay M. Trummel



                                                   PECO ENERGY COMPANY
                                                   "PECO"



                                                   By:_________________________

Witness:

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



<PAGE>

                                    Exhibit B

                            LEASED EMPLOYEE AGREEMENT

         THIS LEASED  EMPLOYEE  AGREEMENT (the  "Agreement") is made and entered
into  this  31st day of  March,  1999,  by and  among  PECO  ENERGY  COMPANY,  a
Pennsylvania   corporation   ("PECO"),   ILLINOIS  POWER  COMPANY,  an  Illinois
corporation ("IP"), and John P. McElwain ("Employee").

         WHEREAS, PECO and IP have entered into that certain Agreement effective
as of January 15, 1998,  as the same has been amended by that certain  Inventive
Compensation  Agreement to Amend the Management  Services  Agreement dated as of
May 19, 1998,  and Amendment  No. 2, dated of even date herewith  (collectively,
the "Management  Agreement"),  the terms of which are  incorporated by reference
herein;

         WHEREAS, the Management Agreement provides for the provision of certain
management  services  by PECO to IP in support of outage  recovery  efforts  and
future operations of IP's Clinton Power Station ("CPS");

          WHEREAS,  PECO  employs  Employee  who has the  experience  and skills
necessary to perform such management services;

         WHEREAS,  PECO has  selected  Employee  to serve as the full time Chief
Nuclear Officer ("CNO") of CPS;

         WHEREAS, in reliance upon PECO's  representations  regarding Employee's
experience and skills,  IP has approved  PECO's  selection of Employee as CNO of
CPS; and


<PAGE>


         WHEREAS,  the parties  hereto desire to permit IP to lease the services
of Employee from PECO subject to the conditions set forth herein;

         NOW,  THEREFORE,  FOR AND IN  CONSIDERATION  OF the mutual promises and
covenants hereinafter set forth, and other good and valuable consideration,  the
receipt and  sufficiency  of which are hereby  acknowledged,  the parties hereto
agree as follows:

         1.  Furnishing  of  Employee.  PECO  agrees  to  furnish,  for the time
specified in Section 2 hereof,  Employee to provide full time services under the
Management Agreement (the "Work").

         2. Term. This Agreement and PECO's provision of Employee shall continue
for the term of the  Management  Agreement or until the earlier  termination  of
this Agreement by written notice of either IP, PECO or Employee,  at the will of
the terminating party, subject,  however, to the terms and conditions of Section
3.1 and Article 11 of the Management Agreement.

         3.  Status of  Employee.  Employee  shall serve as the CNO of IP and in
such capacity shall be an officer of IP subject to the direction of the IP Chief
Executive  Officer ("CEO") or other officer as designated by the CEO and subject
to IP's standard rules of conduct (a copy of which is attached to the Management
Agreement as Attachment "C"). For operational and functional purposes related to
the  operation  of the CPS,  Employee  shall be treated as an employee of IP and
shall be entitled to those rights of  indemnification  and other protection from
claims brought by third parties as afforded by IP to its officers and employees.
Except as  expressly  provided  by the  foregoing,  neither  PECO nor any of its
employees or agents,  including Employee,  shall maintain,  hold out, represent,
state or imply to any  other  individual  or  entity  that an  employer/employee
relationship exists between IP and PECO or between IP and Employee.


<PAGE>



              Notwithstanding  the  foregoing,  PECO,  IP  and  Employee  hereby
acknowledge and agree that Employee shall remain an employee of PECO, and except
for actions  taken in his position and under his authority as CNO, IP shall have
no liability of any kind or nature  whatsoever  to Employee,  PECO, or any other
individual or entity, as a result of the actions of Employee as a consequence of
Employee's status as a leased employee.  PECO and Employee  recognize,  covenant
and agree that neither PECO nor Employee  shall be entitled to any  compensation
or other benefits given to any employees of IP, including  (without  limitation)
pension,  welfare  benefits,  incentive  bonuses,   compensation  insurance  and
unemployment insurance.

         4. Duties of Employee.  As an officer of IP,  Employee agrees to devote
his time,  attention and energies in the performance of the duties designated by
IP,  that  with  respect  to such  duties  Employee  shall  be  under  the  sole
supervision,  direction and control of IP, and that Employee is subject to those
duties of loyalty  and  honesty to IP as an officer as  established  by Illinois
law.  As an  officer  of IP,  Employee  shall  report  to, and be subject to the
supervision  of, the CEO of IP or such  other  officer of IP as may from time to
time be designated by the CEO.

          Notwithstanding  the  foregoing,  IP, PECO and Employee  recognize and
agree that Employee may share  information  regarding CPS with PECO  management,
including information regarding plant status, plant condition,  budgets , future
needs  for  repairs,   replacements,   modifications  and  costs,   plant  staff
performance,  labor  relations,  regulatory  issues,  and local  conditions  and
issues, provided, however, that in no event may Employee disclose information to
PECO  management (i) which is privileged to IP  (including,  but not limited to,
the attorney client communication  privilege and work product doctrine), or (ii)
the  disclosure  of which  would  constitute  a breach of a  confidentiality  or
nondisclosure  agreement to which IP is bound with another party or constitute a
violation of law; provided further that any information  shared by Employee with
PECO management shall be subject to the non-disclosure provisions of Paragraph 6
of this Agreement.


<PAGE>



          PECO shall not take any action  either  pursuant to this  Agreement or
the Management Agreement that diminishes the final decision-making  authority of
IP with respect to licensed activities, including, but not limited to, shut-down
and start-up, reporting, operability determinations,  deferral or prioritization
of  repairs,  implementation  of quality  assurance  programs,  continuation  of
operations or cessation of operations  (either  short-term or  permanently),  or
organizational or design changes to the CPS.

         5.   Responsibility   for  Compensation   and  Expenses.   PECO  hereby
recognizes,  covenants and agrees that, as the employer of Employee and pursuant
to Section 20.4 of the Management Agreement,  it shall be solely and exclusively
responsible  and liable for Employee's  compensation,  and all expenses,  costs,
liabilities, assessments, taxes, insurance and other obligations incident to the
employment of Employee in performance of the Work hereunder,  including (without
limitation) all wages and salary,  benefits,  withholding taxes, social security
taxes, unemployment taxes and workers' compensation insurance premiums.

         6.  Confidentiality.  As an  employee  of  PECO  and  pursuant  to this
Agreement,  Employee  shall be bound by the  provisions  of the  Confidentiality
Agreement  between  IP and  PECO,  dated  December  29,  1997,  attached  to the
Management  Agreement,  and incorporated by reference herein and by the terms of
the Confidentiality  Agreement among IP, PECO and AmerGen Energy Company,  dated
March 12, 1999, which is incorporated by reference herein.

         7.   Miscellaneous.

         (a) The parties may not assign this  Agreement or any of their  rights,
duties or  obligations  hereunder  without  the  prior  written  consent  of the
remaining  parties,  and any  attempted  assignment  without such prior  written
consent shall be null and void.

<PAGE>

         (b)  This  Agreement  constitutes  the  complete  understanding  of the
parties with respect to the subject matter set forth herein, and shall supersede
any prior  understanding or agreement to the contrary,  written or oral, and may
not be amended,  altered or discharged unless in a writing signed by all parties
hereto.

         (c) This  Agreement  shall be governed by and  construed in  accordance
with the laws and decisions of the State of Illinois.

         (d) Failure by either party  hereto,  any time or from time to time, to
enforce  and  require  the  strict  keeping  and  performance  of any  terms and
conditions of this Agreement shall not constitute a waiver of any such terms and
conditions at any future time and shall not prevent such party from insisting on
the strict keeping and performance of such terms and conditions at any time.

         (e)  The  rights  and  responsibilities  of the  parties  hereto  under
Sections 4 and 6 hereof shall  survive any  termination  or  expiration  of this
Agreement.

         (f)  The  unenforceability  or  invalidity  of any  provision  of  this
Agreement  shall not affect the  validity  or  enforceability  of the  remaining
provisions hereof.

<PAGE>

         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed by their duly authorized officers.

                                                   PECO ENERGY COMPANY
                                                   "PECO"



Witness:                                           By:_________________________


_____________________                              Its:________________________




                                                   ILLINOIS POWER COMPANY
                                                   "IP"


Witness:                                           By:/s/David W. Butts

/s/Kay M. Trummel                                  Its:  Sr. Vice President




                                                   "EMPLOYEE"


Witness:                                           /s/John P. McElwain
                                                   John P. McElwain
/s/Dale L. Holtzscher

<PAGE>


                                    Exhibit C

                            CONFIDENTIALITY AGREEMENT

                  THIS  CONFIDENTIALITY  AGREEMENT (the "Agreement") is made and
         entered into this 12th day of March,  1999, by and among ILLINOIS POWER
         COMPANY, an Illinois  corporation  ("Illinois Power"),   AMERGEN ENERGY
         COMPANY L.L.C., a Delaware limited liability company  ("AmerGen").  And
         PECO ENERGY  COMPANY,  a Pennsylvania  corporation  and  shareholder of
         AmerGen ("PECO") (PECO and AmerGen are sometimes  collectively referred
         to herein as the "Buyer Parties").

                               W I T N E S S E T H

                  WHEREAS,  Illinois  Power and the Buyer Parties are discussing
         the  possibility of a transaction  involving the sale or abandonment of
         the Clinton  Nuclear  Power Station (the  "Clinton  Plant")  located in
         Clinton, Illinois (the "Transaction"); and

                  WHEREAS,  in order to permit each party to evaluate  fully the
         potential merits of the Transaction,  each party will furnish, or cause
         to be furnished,  "Evaluation Material" (as defined below) to the other
         parties and their Representatives (as defined below);

                  NOW, THEREFORE,  for and in consideration of the premises, the
         mutual promises,  covenants and agreements  contained herein, and other
         good and valuable  consideration,  the receipt and sufficiency of which
         are  hereby  acknowledged,   the  parties  hereto  (collectively,   the
         "Parties" and individually, a "Party") hereby agree as follows:

                  1.       Definitions

                           (a)  "Affiliate"  shall have the meaning set forth in
         Rule 12b-2 of the  Securities  Exchange  Act of 1934,  as amended  (the
         "Exchange Act").

                           (b)  "Evaluation   Material"  shall  mean  all  data,
         information,  reports,  interpretations  ions,  forecasts  and  records
         (whether in oral or written form,  electronically  stored or otherwise)
         containing  or  otherwise   reflecting   information   concerning   the
         Transaction,  the Supplying  Party (as defined below) or its Affiliates
         or  subsidiaries  which is (or has  been  heretofore)  provided  by the
         Supplying  Party  or its  Representatives  (as  defined  below)  to the
         Recipient (as defined  below) or its  Representatives  pursuant to this
         Agreement or any of the Other  Agreements (as defined  below),  and all
         notes, analyses,  compilations,  studies or other documents in tangible
         form (whether in written form, electronically stored or otherwise) that
         contain or otherwise  reflect such information  whether prepared by the
         Supplying Party, the Recipient or their respective  Representatives  or
         others.   Notwithstanding   the  foregoing,   the  following  will  not
         constitute "Evaluation Material" for purposes of this Agreement:

                                    (i)  Information  that  was  already  in the
                           possession  of the  Recipient or its  Representatives
                           prior to the date hereof and that was not acquired or
                           obtained from the Supplying  Party or its  Affiliates
                           or Representatives;

<PAGE>


                                    (ii)  Information  that is  obtained  by the
                           Recipient or its Representatives  from a source other
                           than  the  Supplying   Party  or  its  Affiliates  or
                           Representatives  who,  insofar  as is  known  to  the
                           Recipient after reasonable inquiry, is not prohibited
                           by a  contractual,  legal or fiduciary  obligation to
                           the Supplying Party from transmitting the information
                           to the Recipient or its Representatives; or

                                    (iii)   Information   that  is  or   becomes
                           generally  available  to the  public  other than as a
                           result  of a  disclosure  by  the  Recipient  or  its
                           Representatives  in  violation of the  provisions  of
                           this Agreement.

         Provided,  however that the  exceptions  set forth in  subsections  (i)
         through (iii) above shall not extend to any data, information, reports,
         interpretations,  forecasts  or records  obtained  or  developed  by or
         disclosed to the Buyer Parties,  or either of them, in connection  with
         PECO's   operation  and   maintenance  of  the  Clinton  Plant  or  its
         performance  under the  Agreement  dated as of  January  15,  1998 with
         Illinois  Power or any other  agreement  between the Buyer  Parties (or
         either of them or any of their  Affiliates)  and Illinois Power (or any
         of its Affiliates)  (such Agreement and all such other agreements being
         herein  referred  to as the "Other  Agreements"),   all of which  data,
         information, reports,  interpretations,  forecasts and records shall be
         deemed Evaluation Material for purposes of this Agreement.

                           (c)  "Representatives"  of any Party  shall  mean the
                  subsidiaries  and  Affiliates of such Party and the respective
                  directors, officers, employees,  representatives and agents of
                  such Party and such Party's subsidiaries and Affiliates.

                  2.  Nondisclosure.  Except as otherwise  expressly provided in
         this  Agreement,  without  the  prior  written  consent  of  the  Party
         delivering or providing the  information or as to which the information
         relates (the "Supplying  Party"),  Evaluation  Material will be held in
         confidence and not disclosed  by the Party  receiving or developing the
         information  following receipt (the "Recipient") or its Representatives
         or used by the Recipient or its Representatives  other than directly or
         indirectly in connection with the  consideration  and evaluation of the
         Transaction or in strict  compliance with such of the Other  Agreements
         as may be relevant.  Except as otherwise expressly provided herein, the
         Recipient further agrees that it will only disclose Evaluation Material
         received from a Supplying Party to its Representatives who need to know
         the  Evaluation  Material to evaluate  the possible  Transaction  or in
         strict  compliance with such of the Other Agreements as may be relevant
         and who are informed of its  confidential  nature and agree to be bound
         by the  terms of this  Agreement.  Each  Recipient  agrees  to be fully
         responsible   for  any  breach  of  this   Agreement   by  any  of  its
         Representatives.

                  3.   Confidentiality  of  Transaction.   Except  as  expressly
         provided  herein,  without the prior  written  consent of the Supplying
         Party,  the Recipient agrees that it and its  Representatives  will not
         disclose  to any  person  (i) that any  investigation,  discussions  or
         negotiations  are  taking or have  taken  place  concerning  a possible
         Transaction,  or (ii) that  either  Party  has  requested  or  received
         Evaluation Material, or any terms or other facts regarding the possible
         Transaction,  including  the status  thereof;  provided,  however  that
         nothing in this  Agreement  shall prohibit a Party from making any such
         disclosure  to the extent it has  received  an opinion of counsel  that
         such  disclosure  is  required  to be  made  by it in  order  to  avoid
         violating the federal securities laws or  stock  exchange  regulations.
         The term  "persons"  as used in  this agreement  shall  be  interpreted
         broadly to include any  corporation,  company,  governmental  agency or
         body, entity,  partnership,  group or individual.
<PAGE>
                   4.      Convenants of  the Buyer Parties.

                           (a) Without limiting the generality of the foregoing,
         the Buyer  Parties  agree that unless  otherwise  required by law, they
         will not permit any person to have access to  Restricted  Data, as such
         term is defined in 42 U.S.C ss.  2014(y),  until and unless the Federal
         Office of Personnel  Management  shall have made an  investigation  and
         report  to  the  Nuclear  Regulatory  Commission  (the  "NRC")  on  the
         character,  associations  and  loyalty of such person and the NRC shall
         have   determined  that  permitting  such  person  to  have  access  to
         Restricted Data will not endanger the common defense and security.

                           (b)  Notwithstanding  anything  to the  contrary  set
         forth in of this Agreement,  any access to Safeguards  Information,  as
         such term is defined  in 10 C.F.R.  ss.  73.2,  shall be subject to the
         limitations and conditions of 10 C.F.R.  ss. 73.21, the safeguards plan
         for the Clinton Plant, and any other applicable legal requirements.

                           (c) The  Buyer  Parties  shall use and  maintain  all
         documents  prepared  by the  Institute  for  Nuclear  Power  Operations
         ("INPO")  about the Clinton  Plant,  as may be made  available to them,
         consistent  with  agreements  between INPO and  Illinois  Power and the
         policies of INPO and  Illinois  Power,  as the same may be amended from
         time to time.  As a  general  matter  the  Buyer  Parties  shall  treat
         information,  reports,  draft  reports,  field  notes,  draft  notes or
         documents,  and technical  documents prepared by INPO about the Clinton
         Plant as if they are Evaluation  Material  belonging to Illinois Power.
         However,  if an INPO document is classified for "General  Distribution"
         and marked "GENERAL" by INPO, the use and distribution of such document
         will not be limited by this Agreement.

                  5. Return and Retention of Evaluation Material. All Evaluation
         Material in tangible  form  (whether  in written  form,  electronically
         stored  or  otherwise)   provided  by  the   Supplying   Party  or  its
         Representatives  will be returned  by the  Recipient  to the  Supplying
         Party  immediately  upon  request,  without  retention  of  any  copies
         thereof.  All other  Evaluation  Material in tangible  form,  including
         analyses,  compilations,  studies,  personal  notes, or other documents
         (whether in written form,  electronically stored or otherwise) prepared
         by the  Recipient  or any of its  Representatives,  and any  Evaluation
         Material  not so  requested  to be  returned,  will be  retained by the
         Recipient and kept subject to the terms of this Agreement or destroyed;
         provided,  however that all such Evaluation Material shall be destroyed
         upon  the  Supplying  Party's  request  with  such  destruction  to  be
         confirmed in writing.  Except as otherwise  provided in this Agreement,
         all   retained   Evaluation   Material   (whether   in  written   form,
         electronically stored or otherwise) will continue to be subject to this
         Agreement.

                  6.   Legal   Process.   If  the   Recipient   or  any  of  its
         Representatives  are  requested or required to disclose any  Evaluation
         Material  (or  to  disclose  that  any  investigation,  discussions  or
         negotiations  are taking or have taken place  concerning  the  possible
         Transaction)  pursuant to a subpoena,  court order, civil investigative
         demand or similar judicial process or other oral or

<PAGE>
         written  request  issued by a court of competent  jurisdiction  or by a
         federal,  state or local governmental or regulatory body, the Recipient
         will provide the  Supplying  Party with prompt  written  notice of such
         request or  requirement  so that the Supplying  Party and/or any of its
         Representatives  may  seek an  appropriate  protective  order  or other
         appropriate  remedy or waive  pursuant to paragraph 13 compliance  with
         the provisions of this Agreement.  If such order or other remedy is not
         obtained  or the  Supplying Party waives compliance with the provisions
         of this Agreement,  the Recipient or its  Representatives,  as the case
         may be, will disclose only that portion of the Evaluation  Material (or
         information   relating  to  any  such  investigation,   discussions  or
         negotiations) that it is advised by counsel that it is legally required
         to so disclose and will exercise  reasonable efforts to obtain reliable
         assurance that  confidential  treatment will be accorded the Evaluation
         Material or information so disclosed.

                  7. No  Obligation  to  Provide:  No  Warranty  of  Accuracy or
         Completeness. This Agreement defines the rights, duties and obligations
         of the Parties with respect to  Evaluation  Material  disclosed or made
         available  hereunder.   Under  no  circumstances  shall  any  Party  be
         obligated  to  disclose  or make  available  to the other  Parties  any
         information  including,  without limitation,  any Evaluation  Material,
         that such  Party in its sole  discretion  determines  not to  disclose,
         provided,  however,  that to the extent that any Party,  acting through
         one  of its  authorized  officers  makes  such  a  determination  as to
         information  requested by the other Party,  it will so advise the other
         Party of that fact. The Parties (i) acknowledge  that no Party, nor any
         Representative  of any Party,  makes any  representation  or  warranty,
         either express or implied,  as to the accuracy or  completeness  of any
         Evaluation Material, and (ii) agree, to the fullest extent permitted by
         law,  that  except as may be  provided in a  Definitive  Agreement  (as
         defined below), no Party, nor any  Representative  of any Party,  shall
         have any  liability to the other  Parties or any of the other  Parties'
         Representatives  on  any  basis  (including,   without  limitation,  in
         contract, tort, under federal or state securities laws or otherwise) as
         a  result  of the  Parties'  participation  in  evaluating  a  possible
         Transaction, the review by any Party of the other Parties'.  Evaluation
         Material,  or the use of the  Evaluation  Material  by any Party or its
         Representatives  in accordance  with the provisions of this  Agreement.
         Each Party  agrees that it is not  entitled to rely on the  accuracy or
         completeness  of the Evaluation  Material.  Each Party  understands and
         agrees  that  there  is  no  definitive   agreement   providing  for  a
         Transaction  currently existing among the Parties and to no contract or
         agreement  providing  for a  Transaction  shall be  deemed  to exist by
         virtue of this Agreement with respect to such  Transaction  except,  in
         the case of this  Agreement,  for the  matters  specifically  agreed to
         herein.

                  8. Securities Laws. The Parties acknowledge that they are, and
         that  their  respective  Representatives  who  are  informed  as to the
         matters that are the subject of this  Agreement will be made, (i) aware
         that the United States  securities  laws would  prohibit any person who
         has material non-public  information about a company from purchasing or
         selling  securities  of  such  company,   or  from  communicating  such
         information  to any other  person  under  circumstances  in which it is
         reasonably  foreseeable  that such person is likely to purchase or sell
         such securities,  and (ii) familiar with the Exchange Act and the rules
         and regulations promulgated thereunder to the extent they relate to the
         matters referred to in this Section 8. The Parties agree that they will
         not use or permit any third  party to use,  and that they will each use
         reasonable   efforts   to  ensure   that   none  of  their   respective
         Representatives  will  use or  permit  any  third  party  to  use,  any
         Evaluation

<PAGE>
         Material  in  contravention  of  the  United  States   securities  laws
         including,  without  limitation,  the  Exchange  Act or any  rules  and
         regulations promulgated thereunder.

                   9.   Non-Solicitation.   Except  as  may  be  provided  in  a
         Definitive  Agreement,  for a period of eighteen (18) months  following
         the  execution  of  this   Agreement,   no  Party  or  its   respective
         Representatives or Affiliates will, directly or indirectly,  solicit or
         direct any other person to solicit any current  officer or key employee
         or contractor of another Party (i) terminate or adversely  alter his or
         her employment or other  relationship  with that Party; or (ii) to seek
         or accept employment or other affiliation with such Party.

                  10.  Exclusivity.  Illinois Power hereby agrees immediately to
         cease any existing  discussions or negotiations  with any third parties
         with  respect  to a sale or other  transfer  of Plant  Clinton (a "Sale
         Transaction")  other than a Transaction with the Buyer Parties or their
         Affiliates.  Illinois  Power shall not and Illinois Power shall use its
         commercially   reasonable   efforts   to   ensure   that  none  of  its
         Representatives or Affiliates shall solicit any person, entity or group
         concerning  any Sale  Transaction,  nor shall  Illinois  Power  furnish
         information or enter into negotiations  regarding, or an agreement for,
         a Sale Transaction,  other than a Transaction with the Buyer Parties or
         their  Affiliates.  The  provisions  and  covenants  contained  in this
         Section 10 shall  expire at 5:00 p.m.  C.S.T.  on April 15, 1999 unless
         extended in a writing signed by all the Parties.

                  11. Indemnification:  Remedies. Each Party will be responsible
         for and will  idemnify  and hold  harmless  the other  Parties from any
         damage,  loss,  cost  or  liability  (including,   without  limitation,
         reasonable  attorney's fees and the costs of enforcing such obligations
         under this  indemnity)  arising out of or resulting  from any breach by
         such Party or its  Representatives of its obligations  hereunder.  Each
         Party  acknowledges  that  remedies  at law are  inadequate  to protect
         against breach of this Agreement and hereby in advance agrees,  without
         prejudice to any rights to judicial or other relief, to the granting of
         equitable relief,  including,  without limitation,  injunction,  in the
         other Parties' favor without proof of actual damages. Each Party agrees
         not to seek and agrees to waive any  requirement  for the  securing  or
         posting of, a bond in connection with a Party seeking or obtaining such
         equitable relief.

                  12. Severability.  If any term or provision of this Agreement,
         or any application  thereof to any circumstances,  shall, to any extent
         and  for  any  reason,  be held to be  invalid  or  unenforceable,  the
         remainder  of  this  Agreement,  or the  application  of  such  term or
         provision to circumstances other than those to which it is held invalid
         or enforceable, shall not be affected thereby and shall be construed as
         if such invalid or  unenforceable  provision  had never been  contained
         herein,  and each term and provision of this  Agreement  shall be valid
         and enforceable to the fullest extent permitted by law.

                  13.  Term.  Except as  provided  in  Sections 9 and 10 of this
         Agreement,  this Agreement  shall be effective for a period of five (5)
         years from the date hereof.

                  14. Miscellaneous.  This Agreement shall constitute the entire
         agreement  among the Parties with respect to the subject matter hereof.
         The  provisions  of this  Agreement  shall  control in the event of any
         inconsistency with the provisions of any Other Agreement and such Other
         Agreement shall be deemed modified hereby.  No modification,  amendment
         or waiver of this
<PAGE>
         Agreement  shall be binding  without the written consent of the Parties
         hereto.  This  Agreement  shall  inure to the benefit of and be binding
         upon each of the Parties and their respective  successors and permitted
         assigns;  provided,  however that neither this Agreement nor any of the
         rights, interests or obligations hereunder may be assigned by any Party
         without  the  prior  written  consent  of  the  other  Parties,  and no
         assignment of any right,  interest or obligation shall release any such
         assigning Party therefrom unless the other Parties shall have consented
         to  such  release  in  writing  specifically  referring  to the  right,
         interest  or  obligation  from  which  such  assigning  Party  is to be
         released.  It is further understood and agreed that no failure or delay
         in exercising any right, power or privilege  hereunder shall operate as
         a waiver  thereof,  nor shall any  single or partial  exercise  thereof
         preclude (nor any waivers  thereof,  unless so expressly stated in such
         written waiver) any other or further  exercise  thereof or the exercise
         of any other right, power or privilege hereunder.

                  15.  Governing  Law. This  Agreement  shall be governed by and
         construed in accordance with the laws of the State of Illinois, without
         regard to the conflict of laws principles thereof.

                  16. Representatives. Any person who at any time after the date
         hereof becomes a  Representative  of either Party shall be deemed to be
         such Party's Representative for purposes of this Agreement,  regardless
         of whether such person was a  Representative  of such Party on the date
         hereof. All references to Affiliates or subsidiaries  contained in this
         Agreement  shall  apply  with  equal  force  and  effect to any and all
         Representatives of such referenced Affiliates or subsidiaries.

                  17.      Notices.

                           (a)  All  notices,   consents,   requests  and  other
         communications  hereunder shall be in writing and shall be sent by hand
         delivery,  by certified or registered mail (return-receipt  requested),
         by facsimile,  or by  recognized  national overnight courier service as
         set forth below:

              If to Illinois Power:  Illinois Power Company
                                     500 South 27th Street
                                     Decatur, Illinois 62521
                                     Attention: Dave Butts
                                     Facsimile: (217) 362-7417

              With a copy to:        Troutman Sanders LLP
                                     5200 NationsBank Plaza
                                     600 Peachtree Street, NE
                                     Atlanta, Georgia 30308
                                     Attention: Terry C. Bridges,
                                     Facsimile: (404) 962-6731
<PAGE>
              If to AmerGen:         AmerGen Energy Company L.L.C.
                                     2301 Market Street
                                     Philadelphia, Pennsylvania 19101
                                     Attention: Paul E. Haviland, Vice President
                                     Facsimile: (215) 841-3508

              With a copy to:        Edward J. Cullen, Jr.
                                     2301 Market Street
                                     Philadelphia, Pennsylvania 19101
                                     Facsimile: (215) 841-4474

              If to PECO:            PECO Energy Company
                                     2301 Market Street
                                     Philadelphia, Pennsylvania 19101
                                     Attention: Paul E. Haviland, Vice President
                                     Facsimile: (215) 841-3508

              With a copy to:        Edward J. Cullen, Jr.
                                     2301 Market Street
                                     Philadelphia, Pennsylvania 19101
                                     Facsimile: (215) 841-4474
<PAGE>
         IN WITNESS  WHEREOF,  the  Parties  have caused  this  Agreement  to be
executed by their duly authorized  representatives as of the date and year first
above written.




                                                   ILLINOIS POWER COMPANY




                                                   By:__________________________


                                                 Title:_________________________


                                                   AMERGEN ENERGY COMPANY L.L.C.



                                                   By:__________________________


                                                 Title:_________________________



                                                   PECO ENERGY COMPANY


                                                   By:__________________________


                                                 Title:_________________________

<PAGE>
                                                                  ATTACHMENT A-1

                                 AmerGen Billing
                              Clinton Power Station
                                   April 1999

A.  Direct Charges
      Capital                                     $       -
      Storeroom Expense                                   -
      Preliminary Survey and Investigation                -
      Paid Absence                                        -
      USE Taxes                                           -
      Operation and Maintenance Expenses                  -
      Direct Nuclear Expenses                             -
      Plant Electric use:
         _____ kwh @_____ rate                            -
                                                   --------
                                                                     $        -

B.  Material Inventory Balance
      Balance-Beginning of Month                  $       -
      Balance-End of Month                                -
                                                   --------
                                                                     $        -

C.  Diesel Fuel Balance
      Balance-Beginning of Month                  $       -
      Balance-End of Month                                -
                                                                     $        -

D.  Nuclear Fuel Purchases                                           $        -
      (excludes amortizations)                                       ----------

Total Billing                                                        $        -

Adjustments                                                          $        -

      Previous Billings                           $       -
      Previous Payments                           $       -
                                                                     $        -
                                                                     -----------

Total Billing                                                        $        -
                                                                     ==========

 *  Note:  this  billing  structure  is  designed  to  include  direct  expenses
associated  with the operation of the plant and reflecting  Programs and Project
Functions that are known at this time. Additional programs and project functions
may be added at a later time to tract other  expenses that are a direct cost for
the operation of the Clinton Power Station.

** Note: IP shall be  responsible  for the costs of Plant  Electric Use prior to
Restart.  Restart  shall be defined as the  commencement  of  generation  of Net
Electric Output from CPS.


<PAGE>

                                                                  ATTACHMENT A-2
                                   AmerGen Billing
                                 Clinton Power Station
                                      April 1999

            Project             Contractors/
FERC       Function     Labor    Consultants    Materials  Miscellaneous   Total

Capital
107         107200      $           $             $            $           $
            107222
            107227
            107232
            107233
            107235
            1073M8
            1073N8
            1073P8
            1073R8
            1073S8
            1073T8
            1073V8
            1073W9
            107302
            107304
            107305
            107306
            107307
            107376
            1075N8
            1075P8
            1075R8
            1075U8
            107512
            107534
108         108200
            1083M8
            1083S8
            1083T8
            108302
            108305
            108306
            108307
                        --------------------------------------------------------

  Total Capital         $           $             $            $           $
                        ========================================================

*    Note:  this  listing only  includes  FERC  accounts  for current  expenses.
     Additional  project  functions  may be added at a later time to track other
     expenses  that are a direct  expense of the safe  operation  of the Clinton
     Power Station.
<PAGE>

                                   AmerGen Billing
                                 Clinton Power Station
                                       April 1999

            Project             Contractors/
FERC       Function     Labor    Consultants    Materials  Miscellaneous   Total
Storeroom
163         163301      $           $             $            $           $
            163303
            163304
            163305
                        --------------------------------------------------------
  Total Storeroom       $           $             $            $           $
                        ========================================================

Preliminary Survey & Investigation
183         183001      $           $             $            $           $
                        ========================================================

Paid Absence:
184         184101      $           $             $            $           $
            184102
            184103
            184108
            184109
            184110
            184111
            184112
            184113
            184114
            184115
            184116
            184201
            184205
            184209
            184411
            184412
            184450
            184501
            184502
            184801
            184803
            184901
            184903
            184913
            184914
            184996
                        --------------------------------------------------------
  Total Paid Absence    $           $             $            $           $
                        ========================================================
USE Taxes:
408         408111      $           $             $            $           $
            408113

                        --------------------------------------------------------
  Total USE Taxes:      $           $             $            $           $
                        ========================================================


<PAGE>


                                   AmerGen Billing
                                 Clinton Power Station
                                     April 1999

            Project             Contractors/
FERC       Function     Labor    Consultants    Materials  Miscellaneous   Total
Operations & Maintenance
500         500001   $           $             $            $           $
502         502001
505         505001
506         506001
510         510001
511         511001
512         512001
513         513001
514         514001
517         517001
519         519001
520         520001
            520002
            520003
            520004
            520005
523         523001
524         524001
            524002
            524003
            524004
            524216
525         525001
528         528001
529         529001
            529002
530         530001
            530002
            530003
531         531001
531         531002
532         532001
            532002
            532003
            532006
562         562001
            562002
570         570001
            570002
            570003
582         582001
583         583004
586         586001

<PAGE>
                                   AmerGen Billing
                                 Clinton Power Station
                                      April 1999

            Project             Contractors/
FERC       Function     Labor    Consultants    Materials  Miscellaneous   Total
593         593002
            593003
735         735002
836         836001
863         863001
878         878001
892         892001
902         902003
903         903001
            903003
912         912015
915         915001
920         920001
            920002
            920003
            920004
921         921001
            921002
            921003
            921004
923         923001
            923003
            923004
924         924004
925         925003
            925004
            925008
            925012
926         926002
            926003
            926008
            926010
            926011
930         930205
            930208
            930209
            930212
931         931003
                        --------------------------------------------------------
 Total O&M              $           $             $            $           $
                        ========================================================
Direct Nuclear Expenses
524         524216      $           $             $            $           $
                        ========================================================

Includes costs incurred in other  Responsibility Areas that are directly related
to CPS

e.g. Name and Accounting Distribution
     EPRI Membership -                    8700-12980-524216-430
     BWR Owners Group -                   8700-13646-524216-430
     Reactor Internals Project at EPRI -  8700-23839-524216-430


<PAGE>
                                                                 ATTACHMENT A-3

                              Clinton Power Station
                      Direct Programs and Project Functions

                                      Project
Program     Program Title             Function       Project Function Title
002030  RF6 - SIXTH REFUELING OUTAGE   163301     CPS STOREROOM OPERATING EXP
                                       163305     CPS COMMERCIAL GRADE DED PROG
                                       184411     PURCHASE SMALL TOOLS
                                       184412     MAINTENANCE OF TOOLS & EQUIP
                                       408113     USE TAX-CPS
                                       417140     FAB SHOP-NON REG ACTIVITY
                                       510001     MAINT SUPV & ENG-STEAM GEN
                                       514001     MAINT OF MISC  STEAM  PLANT
                                       517001     OPER SUPV & ENG-NUCLEAR
                                       519001     OPER OF COOLANT & WATER EQUIP
                                       520001     OPERATING  REACTOR & AUX
                                       520002     OPER-RADIOLOGICAL  CONTROLS
                                       520003     DECONTAMINATION ACTIVITIES
                                       520004     RADIOACTIVE  WASTE DISPOSAL
                                       520005     NUCLEAR FUEL LOAD & UNLOAD
                                       523001     OP TURBS/GENRS/ELEC PLT EQUIP
                                       524001     BLDG SERV & MISC NUC OPER EXP
                                       524002     PLANT SECURITY-NUC
                                       524003     RESEARCH &  DEVELOPMENT-NUC
                                       524004     REGULATORY  FEES - NUCLEAR
                                       525001     RENTS-NUCLEAR OPERATION
                                       528001     MAINT SUPV & ENG-NUCLEAR
                                       529001     MAINT OF LAKES & CANALS
                                       529002     MAINT NUC BLDGS, GROUNDS, IMP
                                       530001     MAINT REACTOR PLANT EQUIPMENT
                                       530002     MAINT CONTROL ROD DRIVE SYSTEM
                                       531001     MAINT ELECTRIC PLANT EQUIP-NUC
                                       531002     MAINT DIESEL DRIVEN  GENER-NUC
                                       532001     MAINT STATION SECURITY SYS-NUC
                                       532002     MAINT MISC EQUIP, SMALL TOOLS
                                       562001     OPER OF NON-CPS TRANS SUBS
                                       562002     OPERATION OF CPS TRANS SUB
                                       570003     MAINT OF CPS TRANS SUB EQUIP
                                       920001     ADMIN & GENERAL SALARIES-ELEC
                                       920003     ADMIN & GENERAL SALARIES-JT
                                       920004     ADMIN & GENERAL SALARIES-NUC
                                       921003     NON-LABOR A&G EXPENSES-JOINT
                                       923004     PROFESSIONAL SERVICES-NUC

All expenses charged to construction
(FERC 107 & 108) will also be billed

                                         Page 1


<PAGE>


                              Clinton Power Station
                      Direct Programs and Project Functions

                                      Project
Program    Program Title              Function       Project Function Title
002068  PAID ABSENCE - NUCLEAR         184101     VACATION
                                       184102     SICKNESS ALLOWANCE
                                       184103     OTHER PAID ABSENCE
                                       184108     VACATION - CPS EMPLOYEES
                                       184109     SICKNESS ALLOWANCE - CPS
                                       184110     OTHER PD ABSENCE - CPS

002087  RF7 -7TH NUCL REFUELING OUTAGE 517001     OPER SUPV & ENG-NUCLEAR
                                       520001     OPERATING REACTOR & AUX
                                       520002     OPER-RADIOLOGICAL CONTROLS
                                       520003     DECONTAMINATION ACTIVITIES
                                       520004     RADIOACTIVE WASTE DISPOSAL
                                       520005     NUCLEAR FUEL LOAD & UNLOAD
                                       524001     BLDG SERV & MISC NUC OPER EXP
                                       524002     PLANT SECURITY-NUC
                                       528001     MAINT SUPV & ENG-NUCLEAR
                                       530001     MAINT REACTOR PLANT EQUIPMENT
                                       531001     MAINT ELECTRIC PLANT EQUIP-NUC
                                       570001     MAINT ELEC LOAD DISPATCH EQUIP
                                       920001     ADMIN & GENERAL SALARIES-ELEC

002147   CPS MODIFICATIONS - NUCLEAR   184450     TRAINING - ELECTRIC
                                       184501     SUPERVISION
                                       184502     BUILDING SERVICE & CLERICAL
                                       184801     A & G TO CONSTRUCTION-ELECTRIC
                                       184996     EMPLOYEE BEN CLEAR-NUCLEAR O&M
                                       408113     USE TAX-CPS
                                       417101     EXPENSE NON-UTILITY OPERATIONS
                                       417120     EXPENSES BILLABLE TO ILN GENER
                                       417500     EXP TO BILL ILLINOVA
                                       502001     OPER OF BOILER & ASSOC EQUIP
                                       505001     OPER TURBO GENERS & ELEC EQUIP
                                       506001     MISC OPERATING EXPENSES-STEAM
                                       512001     MAINT OF BOILER & ASSOC EQUIP
                                       513001     MAINT-TURBN GEN & ASSOC EQUIP
                                       514001     MAINT OF MISC STEAM PLANT
                                       517001     OPER SUPV & ENG-NUCLEAR
                                       519001     OPER OF COOLANT & WATER EQUIP
                                       520001     OPERATING REACTOR & AUX
                                       520002     OPER-RADIOLOGICAL CONTROLS
                                       520003     DECONTAMINATION ACTIVITIES
                                       523001     OP TURBS/GENRS/ELEC PLT EQUIP


All expenses charged to construction
(FERC 107 & 108) will also be billed

                                         Page 2
<PAGE>
                              Clinton Power Station
                      Direct Programs and Project Functions

                                      Project
Program    Program Title              Function       Project Function Title
002147  CPS MODIFICATIONS - NUCLEAR    524001     BLDG SERV & MISC NUC OPER EXP
                                       528001     MAINT SUPV & ENG-NUCLEAR
                                       529002     MAINT NUC BLDGS, GROUNDS, IMP
                                       530001     MAINT REACTOR PLANT EQUIPMENT
                                       530002     MAINT CONTROL ROD DRIVE SYSTEM
                                       531001     MAINT ELECTRIC PLANT EQUIP-NUC
                                       570002     MAINT OF TRANS SUB EQUIP
                                       583004     OPER OH DIST LINES-UNDER 34.5
                                       586001     TURN ON/OFF CHANGE ELEC METERS
                                       593003     MAINT LESS THAN 34.5 OH LINES
                                                  & OH SERV
                                       878001     REMOVE/CHANGE GAS METERS ®S
                                       920001     ADMIN & GENERAL SALARIES-ELEC
                                       920002     ADMIN & GENERAL SALARIES-GAS
                                       921003     NON-LABOR A&G EXPENSES-JOINT
                                       926002     ADMINISTRATION OF PENSION PLAN
                                       926003     GROUP INSURANCE CONTRIBUTIONS
                                       930209     COMM WELF CONT-ELEC-FERC 426.1

002174  EMPLOYEE SERVICES ADMIN        184111     VACATION-CSBG EMPLOYEES
                                       184112     SICKNESS ALLOWANCE - CSBG
                                       184113     OTHER PAID ABSENCE - CSBG
                                       184114     VACATION - SSBG/FBG
                                       184115     SICKNESS ALLOWANCE - SSBG/FBG
                                       184116     OTHER PAID ABSENCE - SSBG/FBG
                                       920003     ADMIN & GENERAL SALARIES-JT
                                       921003     NON-LABOR A&G EXPENSES - JOINT
                                       923003     PROFESSIONAL SERVICES-JOINT

002203   MAINTAIN PLANT - NUCLEAR      163301     CPS STOREROOM OPERATING EXP
                                       408113     USE TAX-CPS
                                       510001     MAINT SUPV & ENG-STEAM GEN
                                       513001     MAINT-TURBN GEN & ASSOC EQUIP
                                       517001     OPER SUPV & ENG-NUCLEAR
                                       519001     OPER OF COOLANT & WATER EQUIP
                                       520001     OPERATING REACTOR & AUX
                                       520002     OPER-RADIOLOGICAL CONTROLS
                                       520003     DECONTAMINATION ACTIVITIES
                                       520004     RADIOACTIVE WASTE DISPOSAL
                                       520005     NUCLEAR FUEL LOAD & UNLOAD
                                       523001     OP TURBS/GENRS/ELEC PLT EQUIP
                                       524001     BLDG SERV & MISC NUC OPER EXP
                                       524002     PLANT SECURITY-NUC
                                       528001     MAINT SUPV & ENG-NUCLEAR
                                       529001     MAINT OF LAKES & CANALS


All expenses charged to construction
(FERC 107 & 108) will also be billed

                                          Page 3
<PAGE>
                              Clinton Power Station
                      Direct Programs and Project Functions

                                      Project
Program    Program Title              Function       Project Function Title
002203  MAINTAIN PLANT - NUCLEAR       529002     MAINT NUC BLDGS, GROUNDS, IMP
                                       530001     MAINT REACTOR PLANT EQUIPMENT
                                       530002     MAINT CONTROL ROD DRIVE SYSTEM
                                       530003     MAINT REACTOR PLANT PIPING
                                       531001     MAINT ELECTRIC PLANT EQUIP-NUC
                                       531002     MAINT DIESEL DRIVEN GENER-NUC
                                       532001     MAINT STATION SECURITY SYS-NUC
                                       532002     MAINT MISC EQUIP, SMALL TOOLS
                                       532003     MISC MAINT MATERIALS & EXP-NUC
                                       562002     OPERATION OF CPS TRANS SUB
                                       570002     MAINT OF TRANS SUB EQUIP
                                       570003     MAINT OF CPS TRANS SUB EQUIP
                                       582001     DIST SUB PCB DISPOSAL COSTS
                                       583004     OPER OH DIST LINES-UNDER 34.5
                                       593003     MAINT LESS THAN 34.5 OH LINES
                                                  & OH SERV
                                       892001     GAS DIST-MAINT OF SERVICES
                                       915001     COST JOBBING&CONTRACT WRK-ELEC
                                       921003     NON-LABOR A&G EXPENSES-JOINT
                                       926011     OTHER EMPL ACTIVITY EXP-NUC

002204  OPERATE PLANT - NUCLEAR        184501     SUPERVISION
                                       408113     USE TAX-CPS
                                       517001     OPER SUPV & ENG-NUCLEAR
                                       519001     OPER OF COOLANT & WATER EQUIP
                                       520001     OPERATING REACTOR & AUX
                                       520002     OPER-RADIOLOGICAL CONTROLS
                                       520003     DECONTAMINATION ACTIVITIES
                                       520004     RADIOACTIVE WASTE DISPOSAL
                                       523001     OP TURBS/GENRS/ELEC PLT EQUIP
                                       524001     BLDG SERV & MISC NUC OPER EXP
                                       524002     PLANT SECURITY-NUC
                                       524004     REGULATORY FEES - NUCLEAR
                                       528001     MAINT SUPV & ENG-NUCLEAR
                                       923004     PROFESSIONAL SERVICES-NUC

002205  COMPLY W/NUCLEAR REG.REQUIRE   408113     USE TAX-CPS
                                       514001     MAINT OF MISC STEAM PLANT
                                       517001     OPER SUPV & ENG-NUCLEAR
                                       519001     OPER OF COOLANT & WATER EQUIP
                                       520001     OPERATING REACTOR & AUX
                                       520002     OPER-RADIOLOGICAL CONTROLS
                                       523001     OP TURBS/GENRS/ELEC PLT EQUIP


All expenses charged to construction (FERC 107 & 108) will also be billed

                                          Page 4
<PAGE>
                              Clinton Power Station
                      Direct Programs and Project Functions

                                      Project
Program    Program Title              Function       Project Function Title
002205  COMPLY W/ NUCLEAR REG. REQUIRE 524001     BLDG SERV & MISC NUC OPER EXP
                                       524002     PLANT  SECURITY-NUC
                                       524004     REGULATORY  FEES - NUCLEAR
                                       524216     MISC EXPENSES - R&D - NUCLEAR
                                       528001     MAINT SUPV & ENG-NUCLEAR
                                       529002     MAINT NUC BLDGS, GROUNDS, IMP
                                       530001     MAINT REACTOR PLANT EQUIPMENT
                                       532002     MAINT MISC EQUIP, SMALL TOOLS
                                       920001     ADMIN & GENERAL SALARIES-ELEC
                                       920003     ADMIN & GENERAL SALARIES-JT
                                       920004     ADMIN & GENERAL SALARIES-NUC
                                       921003     NON-LABOR A&G EXPENSES-JOINT
                                       921004     NON-LABOR A&G EXPENSES - NUC.
                                       924004     PROPERTY INS PREMIUMS-NUC
                                       925003     INJURIES & DAMAGES INS-JT
                                       925004     INJURIES & DAMAGES INS-NUC
                                       925008     EMPL INJ & DAMAGE CLAIMS-NUC
                                       925012     OTHER  INJ & DAMAGE CLAIMS-NUC
                                       926011     OTHER EMPL ACTIVITY EXP-NUC
                                       930208     CO TRADE ASSN DUES & CONT-NUC

002206  PROCURE & MANAGE NUCLEAR FUEL  517001     OPER SUPV & ENG-NUCLEAR

002207  PROCURE & CONTROL MAT'L - NUC. 163301     CPS STOREROOM OPERATING EXP
                                       163303     CLINTON FREIGHT ON MATERIALS
                                       163304     CLINTON MATERIAL INVENTORY ADJ
                                       163305     CPS COMMERCIAL GRADE DED PROG
                                       408113     USE TAX-CPS
                                       517001     OPER SUPV & ENG-NUCLEAR
                                       520001     OPERATING REACTOR & AUX
                                       524001     BLDG SERV & MISC NUC OPER EXP
                                       529002     MAINT NUC BLDGS, GROUNDS, IMP

002208  PROVIDE ADMIN. SUPPORT - NUC.  163301     CPS STOREROOM OPERATING EXP
                                       184209     GARAGE EXPENSES NON-SPECIFIC
                                       184501     SUPERVISION
                                       408113     USE TAX-CPS
                                       517001     OPER SUPV & ENG-NUCLEAR




All expenses charged to construction (FERC 107 & 108) will also be billed

                                         Page 5
<PAGE>
                              Clinton Power Station
                      Direct Programs and Project Functions

                                      Project
Program    Program Title              Function       Project Function Title
002208  PROVIDE ADMIN. SUPPORT - NUC.  520001     OPERATING REACTOR & AUX
                                       520002     OPER-RADIOLOGICAL CONTROLS
                                       520005     NUCLEAR FUEL LOAD & UNLOAD
                                       523001     OP TURBS/GENRS/ELEC PLT EQUIP
                                       524001     BLDG SERV & MISC NUC OPER EXP
                                       524002     PLANT SECURITY-NUC
                                       524216     MISC EXPENSES - R&D - NUCLEAR
                                       528001     MAINT SUPV & ENG-NUCLEAR
                                       529001     MAINT OF LAKES & CANALS
                                       529002     MAINT NUC BLDGS, GROUNDS, IMP
                                       530001     MAINT REACTOR PLANT EQUIPMENT
                                       531001     MAINT ELECTRIC PLANT EQUIP-NUC
                                       532002     MAINT MISC EQUIP, SMALL TOOLS
                                       836001     UG STOR-MAIN PURIFY EQUIP
                                       920003     ADMIN & GENERAL SALARIES-JT
                                       920004     ADMIN & GENERAL SALARIES-NUC
                                       921003     NON-LABOR A&G EXPENSES - JOINT
                                       921004     NON-LABOR A&G EXPENSES - NUC.
                                       923003     PROFESSIONAL SERVICES-JOINT
                                       923004     PROFESSIONAL SERVICES-NUC
                                       925004     INJURIES & DAMAGES INS-NUC
                                       925008     EMPL INJ & DAMAGE CLAIMS-NUC
                                       926011     OTHER EMPL ACTIVITY EXP-NUC

002209  MANAGE HUMAN RESOURCES - NUC.  163301     CPS STOREROOM OPERATING EXP
                                       408113     USE TAX-CPS
                                       506001     MISC OPERATING EXPENSES-STEAM
                                       510001     MAINT SUPV & ENG-STEAM GEN
                                       517001     OPER SUPV & ENG-NUCLEAR
                                       519001     OPER OF COOLANT & WATER EQUIP
                                       520001     OPERATING REACTOR & AUX
                                       520002     OPER-RADIOLOGICAL CONTROLS
                                       520004     RADIOACTIVE WASTE DISPOSAL
                                       524001     BLDG SERV & MISC NUC OPER EXP
                                       524002     PLANT SECURITY-NUC
                                       524216     MISC EXPENSES - R&D - NUCLEAR
                                       528001     MAINT SUPV & ENG-NUCLEAR
                                       529001     MAINT OF LAKES & CANALS
                                       529002     MAINT NUC BLDGS, GROUNDS, IMP
                                       531001     MAINT ELECTRIC PLANT EQUIP-NUC


All expenses charged to construction (FERC 107 & 108) will also be billed

                                         Page 6
<PAGE>
                              Clinton Power Station
                      Direct Programs and Project Functions

                                      Project
Program    Program Title              Function       Project Function Title
002209  MANAGE HUMAN RESOURCES - NUC.  532002     MAINT MISC EQUIP, SMALL TOOLS
                                       532003     MISC MAINT MATERIALS & EXP-NUC
                                       532006     FABRIC'TN & MACH WRK-IP AREAS
                                       926011     OTHER EMPL ACTIVITY EXP-NUC

002233  JC SSBG & FBG TRANSFER CHARGES 517001     OPER SUPV & ENG-NUCLEAR
                                       520001     OPERATING REACTOR & AUX
                                       523001     OP TURBS/GENRS/ELEC PLT EQUIP
                                       524001     BLDG SERV & MISC NUC OPER EXP
                                       528001     MAINT SUPV & ENG-NUCLEAR
                                       532002     MAINT MISC EQUIP, SMALL TOOLS
                                       532003     MISC MAINT MATERIALS & EXP-NUC
                                       912015     PROMOTE/RETAIN SALES EXP-JT
                                       920001     ADMIN & GENERAL SALARIES-ELEC
                                       920003     ADMIN & GENERAL SALARIES-JT
                                       920004     ADMIN & GENERAL SALARIES-NUC
                                       921001     NON-LABOR A&G EXPENSES - ELEC
                                       921003     NON-LABOR A&G EXPENSES - JOINT
                                       921004     NON-LABOR A&G EXPENSES - NUC.
                                       923001     PROFESSIONAL SERVICES-ELEC
                                       923004     PROFESSIONAL SERVICES-NUC
                                       926008     OTHER EMPL ACTIVITY EXP-ELEC
                                       926010     OTHER EMPL ACTIVITY EXP-JT
                                       926011     OTHER EMPL ACTIVITY EXP-NUC
                                       930205     CO TRADE ASSN DUES & CONT ELEC

002253  YEAR 2000 - ESBG - NUCLEAR     523001     OP TURBS/GENRS/ELEC PLT EQUIP
                                       524001     BLDG SERV & MISC NUC OPER EXP
                                       920003     ADMIN & GENERAL SALARIES-JT
                                       920004     ADMIN & GENERAL SALARIES-NUC
                                       923004     PROFESSIONAL SERVICES-NUC

All expenses charged to construction (FERC 107 & 108) will also be billed

                                         Page 7




William B. Conway Jr.
Illinova Corporation
500 South 27th Street
Decatur, Illinois 62521

Dear Mr. Conway:

         This letter is to confirm the terms of your  employment  with  Illinova
Corporation.

I.  Employment  Date.  Your first day of employment  will be April 12, 1999 (the
"Employment Date").

I.  Salary. Your annual base salary will be $295,000, subject to periodic review
to determine whether an increase is appropriate.

I.  Bonus.  You will be  entitled  to  participate  in the  Executive  Incentive
Compensation  Plan. Your bonus under the Executive  Incentive  Compensation Plan
will  be  $118,000  (which  is 40%  of  your  salary)  if the  target  level  of
performance is achieved,  and your bonus will be $177,000  (which is 60% of your
salary) at the maximum achievement level.

I. Long-Term  Incentive Award.  For 1999, your entire long-term  incentive award
will be in the form of a stock  option,  the terms of which are reflected in the
enclosed stock option agreement. The option will be granted as of the Employment
Date,  and the exercise price per share will be the fair market value of a share
of stock on the grant date.  After 1999, 50% of your long-term  incentive  award
will be made as a stock  option  grant,  and the  remaining  50% will be made as
a performance share grant.

I. Supplemental Pension. In lieu of participation in the Company's  Supplemental
Executive  Retirement  Plan,  you will be covered by the  enclosed  Supplemental
Pension Plan.

I. Retention  Agreement.  You will be covered by the enclosed Employee Retention
Agreement, which provides benefits in the event of a Change in Control.

I. Loan.  To compensate  you for amounts you have  foregone by leaving  Troutman
Sanders LLP to join  Illinova  Corporation,  you will be entitled to a loan from
the Company of  $250,000.  The terms of the loan are  reflected  in the enclosed
letter and promissory note.

I. Lump Sum Death Benefits. If your death should occur while you are employed by
the  Company,  your  surviving  spouse  (or, if she does not  survive  you,  the
beneficiary  designated  by you) will be entitled to a lump sum death benefit of
two times the amount of your salary  plus your target  bonus at the time of your
death. In lieu of receiving this lump sum death benefit,  your surviving  spouse
may elect to receive the surviving spouse benefit under the Supplemental Pension
<PAGE>

Plan. (If your spouse does not survive you, only the death benefit  described in
this paragraph is payable.  The  Supplemental  Pension Plan does not provide for
other survivor benefits.)

I. Termination.  You may resign from the Company at any time for any reason, and
the Board of Directors of the Company may terminate your  employment at any time
for any reason.  At the time of your  termination  of  employment,  you (or your
estate)  will be entitled to the  compensation  and  benefits  specified in this
letter and the enclosed  material,  as well as to the other  benefits you earned
while employed by the Company,  to the extent such compensation and benefits are
payable on your termination of employment.

         If the  foregoing  reflects  your  understanding  of the  terms of your
agreement  with the Company,  please so indicate by signing and returning a copy
of this  letter  to the  undersigned,  along  with a signed  copy of each of the
enclosures.


                                                            Very truly yours,

                                                            Illinova Corporation



                                                            Charles E. Bayless

Accepted and agreed to this 13th day of April, 1999.



         William B. Conway Jr.
<PAGE>
                      NON-QUALIFIED STOCK OPTION AGREEMENT
                              ILLINOVA CORPORATION
                   1992 LONG-TERM INCENTIVE COMPENSATION PLAN

     THIS AGREEMENT,  entered into as of the 12th day of April, 1999 (the "Grant
Date"),  by and  between  Illinova  Corporation,  an Illinois  corporation  (the
"Company") and William B. Conway Jr. (the "Employee"),

                                WITNESSETH THAT:

         WHEREAS,  the Company maintains the Illinova Corporation 1992 Long-Term
Incentive Compensation Plan (the "Plan"), which is incorporated and forms a part
of this  Agreement,  for the  benefit of key  employees  of the  Company and its
Subsidiaries;

         WHEREAS,  to induce the Employee to accept  employment  by the Company,
the Company has agreed to grant to the  Employee  the option  described  in this
Agreement; and

         WHEREAS,  the  Employee  and the  Company  desire  to enter  into  this
Agreement reflecting the award of such option;

         NOW,  THEREFORE,  IT IS AGREED,  by and  between  the  Company  and the
Employee as follows:

                                   SECTION ONE
                                      GRANT

         Subject to the terms and conditions of the Plan and this Agreement, the
Employee  is hereby  awarded an option to purchase  30,000  shares of Stock (the
"Option"). The Option is not intended, and shall not be treated, as an incentive
stock option (as that term is used in Section 422 of the Code).

                                   SECTION TWO
                                  OPTION PRICE

         The  option  price of each  share of stock  subject  to the  Option  is
$21.781.

                                  SECTION THREE
                            EXERCISE, EXPIRATION AND
                             CANCELLATION OF OPTION

         The Option shall be exercisable by the Employee in accordance  with the
following schedule:

<PAGE>

If the Employee is employed through     The Option shall become exercisable with
       the following  date:               respect to the following number of
                                          shares on and after that date:
- ------------------------------------ -------------------------------------------
One-year anniversary of Grant Date                  10,000 shares
- ------------------------------------ -------------------------------------------
Two-year anniversary of Grant Date                  10,000 shares
- ------------------------------------ -------------------------------------------
Three-year anniversary of Grant Date                10,000 shares
- ------------------------------------ -------------------------------------------

     If the  Employee's  employment by the Company  continues  through the 9-1/2
year  anniversary  of the Grant  Date,  then any  portion of the  Option  herein
granted  and  not  previously  exercisable  shall  become  exercisable  on  such
9-1/2-year anniversary.

     The Option shall expire as to any  unexercised  portion on the earliest of:

     (a) the tenth anniversary of the date first above written;

     (b) the first anniversary of the Employee's death;

     (c) five years following the Employee's date of retirement; or

     (d)  the  date  of  the  Employee's  Termination;   provided  that  if  the
          Employee's employment ceases because of a Termination, any exercise of
          the Option  occurring on or after the  Employee's  date of Termination
          shall be void and shall be ineffective.

         For purposes of this  Agreement,  the  Employee's  "date of retirement"
shall be the date of Retirement,  Early  Retirement or Disability  Retirement as
those terms are defined in the Plan.

         If the Employee exercises the Option with respect to a portion, but not
all, of the shares of Stock subject  thereto,  the Option shall thereafter cease
to be exercisable with respect to the shares of Stock for which it was exercised
but,  subject to the terms and conditions of the Plan and this Agreement,  shall
continue to be  exercisable  with respect to the shares of Stock with respect to
which it was not exercised.

         If the  Employee's  Termination  occurs  prior to the date on which any
portion of the Option has become  exercisable,  that portion of the Option shall
be forfeited upon such Termination.  Notwithstanding the foregoing provisions of
this Agreement,  the Option shall not become  exercisable and shall be forfeited
if the Employee does not become an employee of the Company, and the Option shall
be forfeited if the Employee  becomes an employee of the Company but voluntarily
resigns within 30 days after his initial date of employment.
<PAGE>
                                  SECTION FOUR
                               METHOD OF EXERCISE

         Subject to the terms and conditions of the Plan and this Agreement, the
Option may be exercised,  in whole or in part,  by filing a written  notice with
the Secretary of the Company at its corporate  headquarters prior to the date on
which the Option expires or is otherwise canceled. Such notice shall specify the
date as of which  the  exercise  is to occur  and the  number of shares of Stock
which  the  Employee  elects  to  purchase  and  shall be in such form and shall
contain such other  information  as the Secretary of the Company may  reasonably
require.  The election  shall be  accompanied by payment of the option price for
such shares of Stock  indicated by the  Employee's  election,  together with the
amount of any required  state,  federal or local  withholding  taxes  arising in
connection  with the purchase of such Stock.  Subject to the  provisions  of the
preceding  sentence and the terms of the Plan, payment shall be by cash or check
payable to the Company,  by delivery of shares of Stock having an aggregate Fair
Market Value  (determined as of the date of exercise) equal to the option price,
and if elected in accordance with this Section 4, the Employee's tax withholding
obligation for the shares of Stock,  indicated by the Employee's election,  or a
combination of both.

                                  SECTION FIVE
                                 TRANSFERABILITY

         The Option shall not be transferable by the Employee other than by will
or the laws of descent and distribution and, during the life of the Employee, is
exercisable only by the Employee or Employee's guardian or legal representative.

                                   SECTION SIX
                         NOTICE OF DISPOSITION OF SHARES

         The  Employee  agrees to notify the  Company  promptly  in the event of
disposal  of any  shares of Stock  acquired  upon the  exercise  of the  Option,
including a disposal by sale, exchange, gift or transfer of legal title.

                                  SECTION SEVEN
                                 ADMINISTRATION

         The authority to manage and control the operation and administration of
this Agreement  shall be vested in the Committee,  and the Committee  shall have
all powers with respect to this  Agreement that it has with respect to the Plan.
Any  interpretation  of this Agreement by the Committee and any decision made by
it with respect to the Agreement is final and binding on all persons.
<PAGE>
                                  SECTION EIGHT
                                  PLAN GOVERNS

         Notwithstanding  anything in this Agreement to the contrary,  the terms
of this Agreement shall be subject to the terms of the Plan, a copy of which may
be obtained by the  Employee  from the office of the  Secretary  of the Company.
Unless the context  clearly  implies or indicates the contrary,  a word, term or
phrase used or defined in the Plan is similarly  used or defined for purposes of
this Agreement.

                                  SECTION NINE
                                    AMENDMENT

         This Agreement may be amended by written  agreement of the Employee and
the  Company,  acting  pursuant to  authority  from the  Committee,  without the
consent of any other person.

                                   SECTION TEN
                   CONTINUED EMPLOYMENT, RIGHTS AS SHAREHOLDER

         This Agreement  does not constitute a contract of employment,  and does
not  give  the  Employee  the  right  to be  employed  by  the  Company  or  its
Subsidiaries.  This  Agreement  does not confer on the  Employee any rights as a
shareholder of the Company prior to the date on which the Employee  fulfills all
conditions for receipt of Stock pursuant to this Agreement and the Plan.

                                 SECTION ELEVEN
                                  GOVERNING LAW

         This Agreement  shall be construed and  administered in accordance with
the laws of the State of Illinois, without regard to the principles of conflicts
of law.
<PAGE>

         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed as of the day and year first above written.

                                                ------------------------------
                                                William B. Conway Jr.


                                                Illinova Corporation

                                                By:___________________________
                                                   Charles E. Bayless
                                                   Chairman, President and Chief
                                                   Executive Officer

ATTEST:



- ---------------------------------
<PAGE>
                              ILLINOVA CORPORATION
                            SUPPLEMENTAL PENSION PLAN

     The Supplemental Pension Plan (the "Plan") is adopted effective as of April
12, 1999. The Plan is established and maintained by Illinova Corporation for the
purpose  of  providing  benefits  for the  Participant,  William  B.  Conway Jr.
Accordingly,  Illinova  Corporation hereby adopts the Plan pursuant to the terms
and provisions set forth below:

                                    ARTICLE I

                                   Definitions

         Wherever  used  herein the  following  terms  shall  have the  meanings
hereinafter set forth:

         1.1 "Accrued Vested Benefit" of the Participant  shall have the meaning
determined in accordance with Section 3.1.

         1.2 "Board" means the Board of Directors of the Company.

         1.3  "Cause" means:

     (a)  the  Participant's  conviction  of any  criminal  violation  involving
          dishonesty, fraud, or breach of trust,

     (b)  the  Participant's   willful  engagement  in  any  misconduct  in  the
          performance  of the  Participant's  duty that  materially  injures the
          Company,

     (c)  the  Participant's  performance  of any act  which,  if  known  to the
          shareholders or regulators of the Company or any of its  subsidiaries,
          would  materially and adversely  affect the business of the Company or
          any of its subsidiaries, or

     (d)  the Participant's  willful and substantial  nonperformance of assigned
          duties;  provided that such nonperformance has continued more than ten
          days after the Company has given written notice of such nonperformance
          and of its intention to terminate the Participant's employment because
          of such nonperformance.

     1.4 "Code" means the Internal Revenue Code of 1986, as amended from time to
time, and any regulations relating thereto.

     1.5 "Company" means Illinova Corporation,  an Illinois corporation,  or, to
the extent  provided in Section 7.8, any successor  corporation  or other entity
resulting from a merger or consolidation  into or with the Company or a transfer
or sale of substantially all of the assets of the Company.

<PAGE>
     1.6  "Earnings"  of the  Participant  for  any  calendar  month  means  the
Participant's  accrued  salary and bonus for that month and,  for this  purpose,
shall include any portion of such salary or bonus that would otherwise have been
includible  for the month but is  contributed  by the  Company  on behalf of the
Participant  pursuant to the  Participant's  election under a "qualified cash or
deferred arrangement" (as defined in section 401(k) of the Code) that is part of
any qualified  profit  sharing plan  maintained by the Company.  For purposes of
this  definition,  the  Participant's  bonus for any  month is the bonus  amount
earned under the Executive  Incentive  Compensation Plan (or any other successor
plan providing for an annual bonus) for that month.  For each calendar year, the
annual  bonus shall be deemed to be earned  evenly  during each of the months in
which the Participant was employed by the Company during that year.

     1.7 "Final Average Earnings" means the average of the Participant's monthly
Earnings  during the 36  consecutive  calendar  months that produces the highest
average  and that  occurs  during the last 60  calendar  months  ending with the
calendar  month  in  which  the   Participant's   employment  with  the  Company
terminates.  If the Participant total employment period with the Company is less
than 36 calendar  months,  his Final  Average  Earnings  shall be  determined by
averaging  (on a calendar  month  basis) the  Earnings  received by him from the
Company during his entire period of employment.

     1.8  "Normal  Retirement  Date" means the first day of the  calendar  month
coinciding with or next following the Participant's 65th birthday.

     1.9 "Participant" means William B. Conway Jr.

     1.10 "Plan" means the Illinova Corporation Supplemental Pension Plan.

     1.11 "Qualified  Plan" means the Illinois Power Company  Retirement  Income
Plan for Salaried Employees or any successor plan.

     1.12  "Qualified  Plan  Retirement  Benefit" means the benefit payable to a
Participant  pursuant  to the  Qualified  Plan by reason of his  termination  of
employment with the Company for any reason other than death.

     1.13 "Qualified Plan Surviving Spouse Benefit" means the benefit payable to
the Surviving  Spouse of the  Participant  pursuant to the Qualified Plan in the
event of the  death of the  Participant  at any time  prior to  commencement  of
payment of his Qualified Plan Retirement Benefit.

     1.14  "Supplemental  Retirement  Benefit" means the benefit  payable to the
Participant pursuant to the Plan by reason of his termination of employment with
the Company for any reason other than death.

     1.15 "Surviving Spouse" means a person who is married to the Participant at
the date of his death and for at least one year prior thereto.
<PAGE>
     1.16 "Supplemental Surviving Spouse Benefit" means the benefit payable to a
Surviving Spouse pursuant to the Plan.

     1.17 The  Participant's  "termination" of employment with the Company shall
be deemed to occur on the day immediately following the date on which he is last
employed by the Company.

     1.18 Words in the  masculine  gender  shall  include the  feminine  and the
singular  shall  include the plural,  and vice versa,  unless  qualified  by the
context.  Any headings used herein are included for ease of reference  only, and
are not to be construed so as to alter the terms hereof.

                                   ARTICLE II
                                   Eligibility

     The  Participant  shall be  eligible to receive a  Supplemental  Retirement
Benefit to the extent  provided in Article III of the Plan.  If the  Participant
dies prior to commencement of payment of his Qualified Plan Retirement  Benefit,
the  Surviving  Spouse  of the  Participant  shall  be  eligible  to  receive  a
Supplemental  Surviving  Spouse Benefit to the extent  provided in Article IV of
the Plan.

                                   ARTICLE III
                         Supplemental Retirement Benefit

     3.1 Amount.  The  Supplemental  Retirement  Benefit shall be payable to the
Participant  in the form of a straight  life  annuity  over the  lifetime of the
Participant only, commencing on his Normal Retirement Date, and shall consist of
a monthly  amount equal to the excess of the amount  described in paragraph  (a)
over the amount described in paragraph (b) below:

          (a)  the Participant's Accrued Vested Benefit;

           LESS

          (b) the  monthly  amount  of the  Qualified  Plan  Retirement  Benefit
     actually payable to the Participant under the Qualified Plan.

     The  amounts  described  in (a) and (b) shall be computed as of the date of
termination of employment of the  Participant  with the Company in the form of a
straight  life  annuity  payable  over  the  lifetime  of the  Participant  only
commencing on his Normal Retirement Date.

     The   Participant's   "Accrued  Vested  Benefit"  shall  be  determined  in
accordance with the following:

<PAGE>

     (i)  if the  Participant's  employment with the Company  terminates for any
          reason prior to January 1, 2000,  his Accrued  Vested Benefit shall be
          zero, and he shall not be entitled to any benefits under the Plan;

     (ii) if the  Participant's  employment  with the Company  terminates  after
          December 31, 1999, and the  termination  occurs by reason of his being
          discharged  by the  Company  without  Cause,  or if the  Participant's
          employment with the Company terminates on or after April 12, 2009, for
          any reason, the Participant's Accrued Vested Benefit shall be equal to
          40% of the Participant's  Final Average Earnings as of the date of his
          termination of employment; and

     (iii)if the  Participant's  employment  with the Company  terminates  after
          December 31, 1999, and prior to April 12,  2009,  and the  termination
          occurs for any reason other than his being  discharged  by the Company
          without Cause, the Participant's Accrued Vested Benefit shall be equal
          to 40% of the  Participant's  Final Average Earnings as of the date of
          his  termination of employment,  multiplied by the vesting  percentage
          determined in accordance with the following schedule:

- ----------------------------------------- --------------------------------------
If the Participant's employment with the        The vesting percentage shall be:
   Company terminates during this period:
- ----------------------------------------- --------------------------------------
  On or after April 12, 2000, and before
              April 12, 2001                               10%
- ----------------------------------------- --------------------------------------
  On or after April 12, 2001, and before
              April 12, 2002                               20%
- ----------------------------------------- --------------------------------------
  On or after April 12, 2002, and before
              April 12, 2003                               30%
- ----------------------------------------- --------------------------------------
  On or after April 12, 2003, and before
              April 12, 2004                               40%
- ----------------------------------------- --------------------------------------
  On or after April 12, 2004, and before
              April 12, 2005                               50%
- ----------------------------------------- --------------------------------------
  On or after April 12, 2005, and before
              April 12, 2006                               60%
- ----------------------------------------- --------------------------------------
  On or after April 12, 2006, and before
              April 12, 2007                               70%
- ----------------------------------------- --------------------------------------
  On or after April 12, 2007, and before
              April 12, 2008                               80%
- ----------------------------------------- --------------------------------------
  On or after April 12, 2008, and before
              April 12, 2009                               90%
- ----------------------------------------- --------------------------------------
        After April 12, 2009                              100%
- ----------------------------------------- --------------------------------------

         3.2 Form of Benefit. The Supplemental Retirement Benefit payable to the
Participant  shall be paid in the same  form  under  which  the  Qualified  Plan
Retirement  Benefit is payable to the Participant.  The  Participant's  election
under the Qualified  Plan of any optional form of payment of his Qualified  Plan
Retirement  Benefit shall also be applicable to the payment of his  Supplemental
Retirement Benefit.

<PAGE>
         3.3  Commencement of Benefit.  Payment of the  Supplemental  Retirement
Benefit to the  Participant  shall  commence  on the same date as payment of the
Qualified Plan  Retirement  Benefit to the Participant  commences.  Any election
under  the  Qualified  Plan  made  by  the  Participant   with  respect  to  the
commencement of payment of his Qualified Plan  Retirement  Benefit shall also be
applicable  with  respect to the  commencement  of  payment of his  Supplemental
Retirement Benefit.

         3.4 Approval of Company. Notwithstanding the provisions of Sections 3.2
and 3.3 above, an election made by the Participant under the Qualified Plan with
respect to the form of payment of his Qualified Plan  Retirement  Benefit or the
date for  commencement of payment thereof shall not be effective with respect to
the form of payment  or date for  commencement  of  payment of his  Supplemental
Retirement  Benefit  hereunder  unless such  election is  expressly  approved in
writing by the Company with respect to his Supplemental  Retirement  Benefit. If
the Company shall not approve such election in writing, then the form of payment
or date for commencement of payment of the Participant's Supplemental Retirement
Benefit shall be selected by the Company in its sole discretion. If benefits are
payable to the  Participant  under this Plan, but no benefits are payable to the
Participant  under the  Qualified  Plan,  the time and form of benefit  shall be
selected by the Participant,  subject to the consent of the Company,  from among
the alternatives that would be available under the Qualified Plan (or such other
alternatives permitted by the Company).

         3.5 Actuarial  Equivalent.  A Supplemental  Retirement Benefit which is
payable in any form other than a straight  life annuity over the lifetime of the
Participant,  or which commences at any time prior to the  Participant's  Normal
Retirement  Date,  shall  be  the  actuarial   equivalent  of  the  Supplemental
Retirement  Benefit  set forth in Section  3.1 above as  determined  by the same
actuarial  adjustments as those  specified in the Qualified Plan with respect to
determination of the amount of the Qualified Plan Retirement Benefit.

                                   ARTICLE IV
                      Supplemental Surviving Spouse Benefit

         4.1 Amount. If the Participant dies either:

(i)      while employed by the Company; or

(ii)     prior to commencement of payment of his Supplemental Retirement Benefit
         under  this  Plan,  but  after  his  employment  with the  Company  has
         terminated with an Accrued Vested Benefit that is greater than zero;
<PAGE>

         then  a  Supplemental  Surviving  Spouse  Benefit  is  payable  to  his
         Surviving  Spouse as hereinafter  provided.  The monthly amount of  the
         Supplemental  Surviving  Spouse Benefit payable to a  Surviving  Spouse
         shall be equal to the excess of the amount  described in paragraph  (a)
         over the amount described in paragraph (b) below:

(a)      the monthly amount of the Qualified  Plan  Surviving  Spouse Benefit to
         which the Surviving Spouse of the Participant  would have been entitled
         under the  Qualified  Plan,  but  determined  by applying the Surviving
         Spouse Benefit provisions of the Qualified Plan as though the amount of
         the monthly  benefit  (payable in the form of a straight  life  annuity
         commencing  at the  Participant's  Normal  Retirement  Date)  which the
         Participant  had  earned on the date of his death had been equal to the
         amount of his Accrued Vested Benefit (as defined in Section 3.1 of this
         Plan);

                                      LESS

(b)      the monthly amount  of  the  Qualified   Plan Surviving Spouse  Benefit
         actually payable to the Surviving Spouse under the Qualified Plan.

         Notwithstanding  any other provision of the Plan, the Surviving  Spouse
shall be  entitled  to  benefits  under this  Section 4.1 only if she waives all
rights to receive the lump sum death  benefits to which she would  otherwise  be
entitled  under the  provisions of the April 12, 1999 letter to the  Participant
from  the  Company,  with  such  waiver  to be made  within  90 days  after  the
Participant's  death  in  accordance  with  the  procedures  established  by the
Company.

         4.2 Form and Commencement of Benefit.  A Supplemental  Surviving Spouse
Benefit  shall be payable  over the  lifetime  of the  Surviving  Spouse only in
monthly  installments  commencing on the date for commencement of payment of the
Qualified Plan Surviving  Spouse Benefit to the Surviving Spouse and terminating
on the date of the last payment of the Qualified Plan  Surviving  Spouse Benefit
made before the Surviving Spouse's death.

                                    ARTICLE V
                           Administration of the Plan

         5.1 Administration by the Company. The Company shall be responsible for
the general  operation and  administration  of the Plan and for carrying out the
provisions thereof.

<PAGE>

         5.2 General Powers of  Administration.  All provisions set forth in the
Qualified  Plan with  respect  to the  administrative  powers  and duties of the
Company,  expenses of administration and procedures for filing claims shall also
be  applicable  with respect to the Plan.  The Company shall be entitled to rely
conclusively  upon all tables,  valuations,  certificates,  opinions and reports
furnished  by any  actuary,  accountant,  controller,  counsel  or other  person
employed or engaged by the Company with respect to the Plan.

                                   ARTICLE VI
                            Amendment or Termination

         The  Plan  may be  amended  or  terminated  at any  time by the  Board,
provided  however  that,  notwithstanding  any other  provision of the Plan,  no
amendment  or  termination  that  would  adversely  affect  the  rights  of  the
Participant or his Surviving Spouse (including, without limitation, his right to
accrue  future  benefits)  may be made by the  Company  except  with the written
consent of the  Participant  (or,  in the event of his death,  with the  written
consent of the Surviving Spouse).

                                   ARTICLE VII
                               General Provisions

         7.1  Funding.  The Plan at all times shall be entirely  unfunded and no
provision  shall at any time be made with respect to  segregating  any assets of
the Company for payment of any benefits  hereunder.  No  Participant,  Surviving
Spouse or any other person shall have any interest in any  particular  assets of
the  Company by reason of the right to receive a benefit  under the Plan and any
such Participant, Surviving Spouse or other person shall have only the rights of
a general unsecured creditor of the Company with respect to any rights under the
Plan.

         7.2 General Conditions.  Except as otherwise expressly provided herein,
all terms and  conditions of the Qualified  Plan  applicable to a Qualified Plan
Retirement  Benefit or a Qualified Plan  Surviving  Spouse Benefit shall also be
applicable to a  Supplemental  Retirement  Benefit or a  Supplemental  Surviving
Spouse  Benefit  payable  hereunder.  Any Qualified Plan  Retirement  Benefit or
Qualified Plan Surviving Spouse Benefit,  or any other benefit payable under the
Qualified Plan, shall be paid solely in accordance with the terms and conditions
of the Qualified  Plan and nothing in this Plan shall operate or be construed in
any way to modify,  amend or affect the terms and  provisions  of the  Qualified
Plan.

         7.3 No  Guaranty  of  Benefits.  Nothing  contained  in the Plan  shall
constitute  a guaranty  by the  Company or any other  entity or person  that the
assets of the Company will be sufficient to pay any benefit hereunder.

         7.4 No  Enlargement  of Employee  Rights.  No  Participant or Surviving
Spouse  shall have any right to a benefit  under the Plan  except in  accordance
with the terms of the Plan.  Establishment of the Plan shall not be construed to
give any Participant the right to be retained in the service of the Company.

<PAGE>

         7.5 Spendthrift  Provision.  No interest of any person or entity in, or
right to  receive a benefit  under,  the Plan  shall be subject in any manner to
sale, transfer, assignment, pledge, attachment, garnishment, or other alienation
or  encumbrance of any kind; nor may such interest or right to receive a benefit
be taken, either voluntarily or involuntarily, for the satisfaction of the debts
of, or other  obligations or claims  against,  such person or entity,  including
claims for  alimony,  support,  separate  maintenance  and claims in  bankruptcy
proceedings.

         7.6 Applicable Law. The Plan shall be construed and administered  under
the laws of the State of Illinois.

         7.7  Incapacity  of  Recipient.  If any  person  entitled  to a benefit
payment  under the Plan is deemed by the Company to be incapable  of  personally
receiving and giving a valid receipt for such  payment,  then,  unless and until
claim therefor shall have been made by a duly appointed  guardian or other legal
representative  of such person,  the Company may provide for such payment or any
part thereof to be made to any other  person or  institution  then  contributing
toward  or  providing  for the care and  maintenance  of such  person.  Any such
payment  shall be a  payment  for the  account  of such  person  and a  complete
discharge of any liability of the Company and the Plan therefor.

         7.8 Corporate Successors.  The Plan shall be binding upon, and inure to
the benefit of, the Company and its  successors  and assigns and upon any person
acquiring,  whether by merger,  consolidation,  purchase of assets or otherwise,
all or substantially all of the Company's assets and business, and the successor
shall be substituted for the Company under the Plan.

         7.9 Unclaimed Benefit.  The Participant shall keep the Company informed
of his current address and the current address of his spouse.  The Company shall
not be obligated to search for the whereabouts of any person. If the location of
the  Participant  is not made known to the Company  within three (3) years after
the date on which payment of the Participant's  Supplemental  Retirement Benefit
may first be made, payment may be made as though the Participant had died at the
end of the  three-year  period.  If,  within  one  additional  year  after  such
three-year period has elapsed,  or, within three years after the actual death of
the  Participant,  the Company is unable to locate any  Surviving  Spouse of the
Participant,  then the  Company  shall  have no  further  obligation  to pay any
benefit  hereunder to such  Participant or Surviving  Spouse or any other person
and such benefit shall be irrevocably forfeited.

         7.10  Limitations  on Liability.  Notwithstanding  any of the preceding
provisions  of the Plan,  neither the Company  nor any  individual  acting as an
employee  or agent of the  Company  shall be liable to any  Participant,  former
Participant, Surviving Spouse or any other person for any claim, loss, liability
or expense incurred in connection with the Plan.

<PAGE>

         IN WITNESS  WHEREOF,  the  undersigned,  on behalf of the Company,  has
executed this Plan to witness its adoption by the Company April _____, 1999, and
the  Participant  has executed  this Plan to witness his  understanding  that it
reflects his agreement with the Company.

                                                     ILLINOVA CORPORATION


                                                     By:________________________

Accepted and agreed to this
 ____ day of April, 1999.




      William B. Conway Jr.



<PAGE>
                              ILLINOVA CORPORATION
                          EMPLOYEE RETENTION AGREEMENT

     THIS EMPLOYEE  RETENTION  AGREEMENT (the  "Agreement")  is entered into the
12th  day of  April,  1999 by and  between  ILLINOVA  CORPORATION,  an  Illinois
corporation (the "Company") and William B. Conway Jr. (the "Employee").

     WHEREAS,  the  Company  desires  to retain  the  services  of  Employee  in
connection with any change in control of the Company;

     NOW, THEREFORE, in consideration of continued employment and for other good
and  valuable  consideration,  the receipt and  sufficiency  of which are hereby
acknowledged, the Company and the Employee agree as follows:

     1. Change in Control Benefits.  The provisions of paragraphs (a), (b), (c),
(d) and (e) below shall apply if a Termination Event occurs:

(a)  The Employee shall be entitled to receive from the Company,  within 30 days
     of the Termination Event or, in the case of a Termination Event that occurs
     under paragraph  2(a)(iv)(C)  (relating to termination prior to a Change in
     Control at the request of an acquiror), within 30 days following the Change
     in Control,  a lump sum cash  payment  equal to three times the sum of: (I)
     the greater of the  Employee's  annual salary rate in effect on the date of
     the Change in Control,  or the  Employee's  annual salary rate in effect on
<PAGE>

     the date Employee's  employment with the Company terminates;  plus (II) the
     amount of the latest  annual bonus earned by  Employee,  provided  that the
     amount  described in this  paragraph (II) shall be zero unless the Employee
     has  received an annual  bonus in one or more of the three  calendar  years
     last preceding the termination.

(b)  Notwithstanding  any provision in the promissory  note or the tax letter to
     the contrary,  any  obligation of the Employee for payment of principal and
     interest otherwise due under the promissory note shall be forgiven, and the
     Employee shall be entitled to the tax gross-up  payment as described in the
     tax letter with respect to such forgiven  interest (but not with respect to
     the  forgiven  principal).  For  purposes of this  paragraph  (b), the term
     "promissory  note" shall mean the promissory note dated April 12, 1999 with
     respect to the borrowing of $250,000 by the Employee from the Company,  and
     the term  "tax  letter"  shall  mean the  letter  from the  Company  to the
     Employee  dated April 12, 1999  providing for the tax gross-up with respect
     to the forgiveness of interest under the promissory note.

(c)  Notwithstanding  any  provision  in the  Supplemental  Pension  Plan to the
     contrary,  the Employee's  Accrued  Vested  Benefit under the  Supplemental
     Pension Plan shall be equal to 40% of the Employee's Final Average Earnings
     (as  defined  under the  Supplemental  Pension  Plan) as of the date of his
     termination of employment with the Company.

(d)  The Employee and his dependents,  if any, shall, for thirty-six (36) months
     following the  Employee's  termination  of employment or until the Employee
     reaches  65 years of age or is  employed  by another  employer,  if sooner,
     continue to  participate in any benefit plans for the Company which provide

<PAGE>

     health (including  medical and dental),  life or disability  insurance,  or
     similar coverage;  provided,  however, that if the Employee has attained 50
     years of age prior to his date of termination, the Employee and dependents,
     if any,  shall be  eligible  to  participate  in any  benefit  plans of the
     Company which provide health and life insurance or similar  coverage as are
     then extended to employees of the Company  electing early retirement at age
     55 on the same terms and subject to the same  conditions as are  applicable
     to such  employees;  provided that such coverage  shall not be furnished if
     the  Employee  waives  coverage by giving  written  notice of waiver to the
     Company.

(e)  Notwithstanding  any provision of the applicable  stock option agreement to
     the contrary,  any stock option or portion  thereof that is  exercisable on
     the  date  of the  Employee's  Termination  (as  that  term  is used in the
     applicable  stock option  agreement)  shall not be forfeited on the date of
     Termination,  but shall instead  remain  exercisable  for the 30-day period
     following the Termination (or, if greater,  the period otherwise  specified
     by the applicable option agreement);  provided that, in no event shall such
     the  option  be  exercisable  after  the date on  which  the  option  would
     otherwise  expire  if the  Employee  had  continued  in the  employ  of the
     Company.

The  Employee  shall not be  required  to  mitigate  damages  by  seeking  other
employment or otherwise.  Except as specifically provided above with the respect
to the  Employee's  becoming  an  employee of another  employer,  the  Company's
obligations  under this paragraph 1 shall not be reduced in any way by reason of
any  compensation  received by the Employee  from sources other than the Company
after termination of the Employee's employment with the Company.

<PAGE>

     The benefits under this paragraph 1 shall be in lieu of, and not inaddition
to, any benefits to which the  Employee  might  otherwise be entitled  under any
other  severance  plan  maintained  by  the  Company  providing   benefits  upon
involuntary termination of employment.

     If a  Termination  Event occurs under  paragraph  2(a)(iv)(C)  (relating to
termination  prior to a Change in Control at the request of an  acquiror),  then
the Employee's  entitlement to compensation  and benefits under this paragraph 1
shall be  determined  as though:  (i) the  Employee  is  rehired by the  Company
immediately  prior to the  Change in  Control  at the  salary  rate equal to his
highest  salary rate during the one-year  period prior to the date of the Change
in  Control;   (ii)  his  employment  with  the  Company  is  terminated   under
circumstances described in paragraph 2(a)(iv)(A) (relating to termination by the
Company without Good Cause)  immediately  after the Change in Control;  (iii) he
had retained any options and other benefits that were forfeited by reason of his
termination  prior to the Change in Control;  and (iv) this Agreement is in full
force and  effect at the time of the Change in  Control,  and at the time of his
deemed termination of employment.

     If the  Employee  is  employed  by the  Company  on the date of a Change in
Control  then,  with respect to any stock option  granted to the Employee by the
Company  prior to the Change in Control that is  outstanding  on the date of the
Change in Control,  that option shall vest and be  exercisable  on and after the
date of the Change in Control.  Except as  otherwise  provided in the  preceding
sentence  with respect to  exercisability  of options,  the options shall remain
subject to the expiration provisions and other terms of the option awards

<PAGE>

without regard to the preceding  sentence;  and the preceding sentence shall not
apply to any stock  option to the extent  that the terms  governing  such option
expressly  reference this Agreement and expressly provide that the provisions of
such sentence are inapplicable.

     2. Definitions.

     (a) For purposes of this Agreement:

          (i) "Good Cause" shall mean:

               (A) the Employee's conviction of any criminal violation involving
               dishonesty, fraud, or breach of trust,

               (B) the  Employee's  willful  engagement in any misconduct in the
               performance of the Employee's  duty that  materially  injures the
               Company,

               (C) the Employee's  performance of any act which, if known to the
               shareholders   or  regulators  of  the  Company  or  any  of  its
               subsidiaries,  would materially and adversely affect the business
               of the Company or any of its subsidiaries, or

               (D) the  Employee's  willful and  substantial  nonperformance  of
               assigned duties;  provided that such nonperformance has continued
               more than ten days after the Company has given written  notice of
               such  nonperformance  and  of  its  intention  to  terminate  the
               Employee's employment because of such nonperformance.


         (ii)   "Good  Reason"  shall exist if,  without an  Employee's  express
                written consent, the Company shall:

               (A) reduce the salary of the Employee; or
<PAGE>

               (B)  materially  reduce the amount of paid vacations to which the
               Employee is  entitled,  or the  Employee's  fringe  benefits  and
               perquisites; or

               (C) significantly  change the nature or decrease the scope of the
               Employee's authority; or

               (D) change by 50 miles or more the  principal  location  in which
               the Employee is required to perform services.


         (iii)  "Change in Control"  shall be deemed to occur on the earliest of
                the  existence of one of the  following and  the  receipt of all
                necessary regulatory approvals therefore:

                (A) The acquisition other than from the Company,  by any entity,
                person or group  (including all Affiliates or Associates of such
                entity, person or group) of beneficial  ownership,  as that term
                is defined in Rule 13d-3 under the  Securities  Exchange  Act of
                1934,  of more than 20% of the  outstanding  shares  of  capital
                stock of the Company  entitled to vote generally in the election
                of   directors,   but   excluding  for  this  purpose  any  such
                acquisition  by the  Company or any of its  subsidiaries  or any
                employee  benefit plan (or related  trust) of the Company or its
                subsidiaries,   or  any  corporation   with  respect  to  which,
                following such acquisition, more than 80% of, respectively,  the
                then outstanding  shares of common stock of such corporation and
                the  combined  voting  power  of  the  then  outstanding  voting
                securities of such corporation entitled to vote generally in the
                election of directors is then  beneficially  owned,  directly or
                indirectly,  by all or substantially  all of the individuals and
                entities who were the beneficial  owners,  respectively,  of the
                common stock and voting  securities  of the Company  immediately

<PAGE>

                prior to such acquisition in  substantially  the same proportion
                as their ownership,  immediately prior to such  acquisition,  of
                the then  outstanding  shares of common  stock of the Company or
                the  combined  voting  power  of  the  then  outstanding  voting
                securities  of the  Company  entitled to vote  generally  in the
                election  of  directors,  as the case may be;

               (B)  The   effective   time  of  a   reorganization,   merger  or
               consolidation of the Company, in each case, with respect to which
               all or substantially all of the individuals and entities who were
               the respective  beneficial  owners of the common stock and voting
               securities   of   the   Company   immediately   prior   to   such
               reorganization,  merger or consolidation  do not,  following such
               reorganization,   merger,  or  consolidation   beneficially  own,
               directly and indirectly more than 80% of  respectively,  the then
               outstanding  shares of common stock or the combined  voting power
               of the  then  outstanding  voting  securities  entitled  to  vote
               generally  in the election of  directors,  as the case may be, of
               the  corporation  resulting from such  reorganization,  merger or
               consolidation, or of a complete liquidation or dissolution of the
               Company  or of the sale or  other  disposition  of a  Substantial
               Portion of the Property of the Company; or

               (C) The  election  to the Board of  Directors  of the  Company of
               directors  constituting a majority of the number of the directors
               in office unless such directors were  recommended for election by
               the existing Board of Directors.

<PAGE>

               (iv) A  "Termination  Event"  means the date that the  Employee's
               employment with the Company terminates under one of the following
               circumstances:

               (A)  The  Employee's  employment  is  terminated  by the  Company
               without  Good Cause  within two (2) years  following  a Change in
               Control.

               (B) The  Employee  voluntarily  terminates  employment  with Good
               Reason within two (2) years following a Change in Control.

               (C) The Employee's  employment is terminated prior to a Change in
               Control  at the  request  of an  acquiror.  For  purposes  of the
               definition of Termination Event, a termination will not be deemed
               to have occurred  solely  because of the transfer of the Employee
               between the Company and a subsidiary  of the Company,  or between
               two subsidiaries of the Company.

     (b)  For purposes of the foregoing,  (i)  "Affiliate" or "Associate"  shall
          have the meaning set forth in Rule 12b-2 under the Securities Exchange
          Act of 1934,  and (ii)  "Substantial  Portion of the  Property  of the
          Company"  shall mean 80% of the aggregate  book value of the assets of
          the Company and its Affiliates and Associates as set forth on the most
          recent balance sheet of the Company, prepared on a consolidated basis,
          by its regularly employed, independent, certified public accountant.

     (c)  Notwithstanding the foregoing, a Change in Control shall not be deemed
         to occur for the Employee by virtue of any transaction in which such an
         Employee is a  participant  in a group  effecting an  acquisition  that
         constitutes  a Change  in  Control  if,  after  such  acquisition,  the
         Employee  holds an  equity  interest  in the  entity  that has made the
         acquisition.
<PAGE>

     3.  Litigation  Expenses.  The  Company  shall  pay  to  the  Employee  the
attorneys'  fees incurred by the Employee in connection  with any claim or legal
action or proceeding  involving this Agreement,  whether brought by the Employee
or by or on behalf of the Employee or by another party;  provided,  however, the
Company  shall not be obligated to pay to the Employee  out-of-pocket  expenses,
including attorneys' fees, incurred by the Employee in any claim or legal action
or  proceeding  in which the  Employee is a party  adverse to the Company if the
Company prevails in such litigation.  The Company shall pay prejudgment interest
on any money  judgment  obtained by the  Employee,  calculated  at the published
prime interest rate charged by the Company's principal banking connection, as in
effect from time to time,  from the date that  payment(s) to the Employee should
have been made under this Agreement.

     4. Post-termination  Payment Obligations Absolute. The Company's obligation
to pay the Employee the amounts and to make the other arrangements  provided for
herein to be paid and made after  termination of the Employee's  employment with
the Company shall be absolute and unconditional and shall not be affected by any
circumstances,   including,  without  limitation,  any  set-off,   counterclaim,
recoupment,  defense  or other  right  that the  Company  may have  against  the
Employee  or anyone  else.  The Company  hereby  waives any  contract  formation
defenses  that it may have with  respect to the Employee  Retention  program and
this Agreement.
<PAGE>

     5.  Withholding.  The  Company  may  withhold  from  any  payment  that  it
isrequired to make under this Agreement amounts sufficient to satisfy applicable
withholding requirements under any federal, state, or local law.

     6.  Successors.  The  obligations  of the  Company  provided  for  in  this
Agreement shall be the binding legal obligations of any successor to the Company
by purchase, merger,  consolidation,  or otherwise.  Rights under this Agreement
may not be assigned by the Employee  during the  Employee's  life,  and upon the
Employee's death will inure to the benefit of the Employee's heirs, legatees and
the legal representatives of the Employee's estate.

     7.   Interpretation.   The  validity,   interpretation,   construction  and
performance  of this  Agreement  shall be  governed  by the laws of the State of
Illinois.  The invalidity or unenforceability of any provision of this Agreement
shall not affect the validity or enforceability of any other provision.

     8. Amendment. This Agreement may be amended or cancelled only by the mutual
agreement of the parties in writing without the consent of any other person.  So
long as the Employee lives, no person, other than the parties hereto, shall have
any rights under or interest in this Agreement or the subject matter hereof.

     9. Tax Payments.  This paragraph 9 shall apply if all or any portion of the
payments and  benefits  provided to the Employee  under this  Agreement,  or any
benefit (including any plan adopted in the future),  would otherwise  constitute
"excess  parachute  payments" within the meaning of Section 280G of the Internal
Revenue  Code of 1986,  as amended  (the  "Code"),  that are  subject to the tax
imposed by Section  4999 of the Code (or  similar  tax and/or  assessment).  If,


<PAGE>

after the application of such tax and/or assessment,  the amount of such payment
and benefits  would be less than if the payment and benefits had been reduced to
an amount that would result in there being no excess  parachute  payments,  then
such payments and benefits shall be so reduced (the minimum extent  necessary so
that no excess parachute payments result). If reduction is necessary  hereunder,
the Employee  shall elect which of the  payments and benefits  shall be reduced.
Determination of whether payments and benefits would constitute excess parachute
payments, and the amount of reduction so that no excess parachute payments shall
exist,  shall be made, at the Company's expense,  by the independent  accounting
firm employed by the Company  immediately  prior to the occurrence of any change
of control of the Company which will result in the imposition of such tax.
<PAGE>


         IN WITNESS  WHEREOF,  the Company and the Employee  have  executed this
Agreement on the ____ day of April, 1999. This Agreement supersedes and replaces
any prior  agreement  between the Company and the  undersigned,  regarding  this
subject.
                                               ILLINOVA CORPORATION



             By:______________________________________




             -----------------------------------------
                       WILLIAM B. CONWAY JR.
<PAGE>
                                 PROMISSORY NOTE

$250,000.00  April 12, 1999
                                                               Decatur, Illinois

         FOR  VALUE  RECEIVED,  the  undersigned,  William  B.  Conway  Jr.,  an
individual  (the  "Employee"),   promises  to  pay  to  the  order  of  Illinova
Corporation,  an Illinois corporation (the "Company"),  on the date on which the
Employee's  employment with the Company  terminates (the "Maturity  Date"),  the
principal sum of $250,000.00 and any accrued  interest on this Note,  subject to
the provisions of this Note relating to forgiveness of such obligations.

         This Note evidences  obligations in connection  with a loan made by the
Company to the  Employee  as part of the  inducement  to the  Employee to become
employed by the Company.

         The unpaid  principal amount of this Note from time to time outstanding
shall bear interest at a rate per annum (based upon a 365/366 day year) equal to
the applicable  Federal rate as of April 12, 1999, as determined for purposes of
section  1274(d) of the Internal  Revenue Code of 1986,  as amended,  compounded
annually.  After the Maturity Date, any unpaid and unforgiven  principal  amount
and  accrued  unforgiven  interest on the unpaid  principal  amount of this Note
shall be payable on demand.

         As of each of the first five one-year  anniversaries of April 12, 1999,
if the Employee is employed by the Company on such anniversary,  an amount equal
to  $50,000.00 of the  principal  amount due under this Note,  together with the
amount of interest that has accrued with respect to the entire unpaid  principal
and interest  amount  since the  preceding  April 12 shall be  forgiven.  If the
Employee's  employment with the Company  terminates prior to April 12, 2004, and
such  termination  is the result of being  discharged by the Company for reasons
other than Cause, any remaining principal and interest shall be forgiven. If the
Employee's employment with the Company terminates (i) prior to April 12, 2004 by
the  Company  for  Cause,  or (ii)  prior to April  12,  2004 by  reason  of the
Employee's  death,  disability,  or voluntary  resignation,  then any  remaining
principal  and  interest  shall  become  due  and  payable  on the  date of such
termination  of  employment.  For purposes of this Note,  the term "Cause" shall
mean:

     (a)  the  Employee's   conviction  of  any  criminal  violation   involving
          dishonesty, fraud, or breach of trust,

     (b)  the Employee's willful engagement in any misconduct in the performance
          of the Employee's duty that materially injures the Company,
<PAGE>

     (c)  the  Employee's  performance  of  any  act  which,  if  known  to  the
          shareholders or regulators of the Company or any of its  subsidiaries,
          would  materially and adversely  affect the business of the Company or
          any of its subsidiaries, or

     (d)  the  Employee's  willful and  substantial  nonperformance  of assigned
          duties;  provided that such nonperformance has continued more than ten
          days after the Company has given written notice of such nonperformance
          and of its intention to terminate the Employee's employment because of
          such nonperformance.

         Subject to the other terms and  conditions  hereof,  the  Employee  may
voluntarily  prepay all or any  portion of the unpaid and  unforgiven  principal
amount of this Note from time to time outstanding and any accrued and unforgiven
interest thereon, without premium or penalty.

         All payments of principal of and interest on this Note shall be payable
in lawful currency of the United States of America at Decatur,  Illinois or such
other place as the Company shall  designate to the Employee in writing,  in cash
or by check. If payment hereunder falls due on a day which is either a Saturday,
Sunday or any other day on which banks in Decatur,  Illinois  are not  generally
open for business to the public (i.e., not a "Business Day"), then such due date
shall be extended to the  immediately  succeeding  Business Day, and  additional
interest shall accrue and be payable for the period of any such extension.

         The  Employee  agrees  that if any of the  following  events of default
(each an "Event of Default") shall occur and be continuing:

     (i)  default in the  performance  or observance of any other  agreements of
          the Employee contained herein, or

     (ii) the institution of any bankruptcy, insolvency, receivership or similar
          proceeding relating to the Employee or his assets, and if such case or
          proceeding  is not  commenced by the  Employee,  it is consented to or
          acquiesced in by the Employee or remains for 60 days undismissed;

then the Company may declare this Note and all unpaid and  unforgiven  principal
of and interest on this Note and all accrued  costs,  expenses and other amounts
under this Note to be due and  payable,  whereupon  all  unpaid  and  unforgiven
principal  of and  interest on this Note and all such costs,  expenses and other
amounts shall immediately become due and payable following such declaration.

         The Employee  hereby  represents  and warrants to the Company as of the
date hereof (i) that this Note is the legally  valid and binding  obligation  of
the Employee, enforceable against the Employee in accordance with its terms, and
(ii) that the execution,  delivery and  performance by the Employee of this Note
does not conflict  with or contravene  (a) any law,  rule or regulation  binding

<PAGE>

upon the Employee or affecting any of the Employee's  assets,  (b) any provision
of any contract,  instrument or agreement binding upon the Employee or affecting
any of the  Employee's  assets,  or (c) any  writ,  order,  judgment,  decree or
decision of any court or governmental  instrumentality binding upon the Employee
or affecting any of the Employee's assets.

         All  notices,   certificates  and  other   communications   ("Notices")
hereunder  shall  be in  writing  and may be  either  delivered  personally,  by
nationally  recognized express courier for overnight  delivery,  or by facsimile
(with request for assurance of receipt in a manner  appropriate  with respect to
communications  of that type,  provided that a confirmation copy is concurrently
sent by a  nationally  recognized  express  courier for  overnight  delivery) or
mailed,  postage  prepaid,  by  certified or  registered  mail,  return  receipt
requested, addressed as follows:

         If to the Company:                 Illinova Corporation
                                            500 South 27th Street
                                            Decatur, Illinois  62521
                                            Attention: General Counsel

         If to the Employee:                William B. Conway Jr.
                                            Illinova Corporation
                                            500 South 27th Street
                                            Decatur, Illinois  62521

         All notices hereunder shall be sent to the Employee or the Company,  as
appropriate,  at such party's  address shown above,  or at such other address as
such party may,  by written  notice  received by the other  party  hereto,  have
designated  as its or his address for such  purpose.  Notices  sent by facsimile
transmission  shall be deemed to have been given when sent; notices sent by mail
shall be deemed to have been given five days after the date mailed by registered
or certified mail,  postage prepaid;  and notices sent by hand delivery shall be
deemed to have been given when received.

         This Note has been made and delivered at Decatur, Illinois and shall be
construed in  accordance  with and governed by the internal laws of the State of
Illinois. Wherever possible, each provision of this Note shall be interpreted in
such  manner as to be  effective  and valid  under  applicable  law,  but if any
provision of this Note shall be prohibited by or invalid under  applicable  law,
such provision  shall be ineffective to the least extent of such  prohibition or
invalidity,  without  invalidating  the  remainder  of  such  provision  or  the
remaining provisions of this Note.

         IN WITNESS WHEREOF, the Employee has caused this Note to be executed as
of the day and year first above written.

                            -----------------------------
                              William B. Conway Jr.

<PAGE>
                                                           April 12, 1999


William B. Conway Jr.
Illinova Corporation
500 South 27th Street
Decatur, Illinois  62521

Dear Mr. Conway:

         This  letter  is  to  confirm  our  verbal   agreement   that  Illinova
Corporation (the "Company") will loan you $250,000.00. The Company is making the
loan to compensate you for amounts you have foregone by leaving Troutman Sanders
LLP to join the Company. As a condition of receiving the loan, you must sign and
return one copy of this letter and the enclosed promissory note.

         As indicated in the promissory note, 20% of the principal amount of the
loan will be forgiven on each of the first through fifth  anniversaries of April
12, 1999,  if you are employed by the Company on such  anniversary.  Also, as of
each such anniversary,  the entire amount of interest accrued on the outstanding
principal during the prior one-year period shall be forgiven.

         As of each  anniversary,  the amount of the forgiveness of principal or
interest  on that date will be taxable  income to you.  As of each date on which
the forgiveness  occurs, you will become entitled to a tax gross-up payment from
the Company in an amount equal to the aggregate of the additional Federal, state
and local  income  taxes  payable  by you by reason  of the  forgiveness  of the
interest amount (but not by reason of the forgiveness of the principal  amount),
and by reason of your receipt of the gross-up payment.

         If, prior to April 12,  2004,  your  employment  is  terminated  by the
Company for  reasons  other than Cause (as  defined in the  attached  promissory
note),  the amount of any outstanding  balance of principal and interest will be
forgiven,  and you will become  entitled to a tax gross-up  payment in an amount
equal to the aggregate of the additional  Federal,  state and local income taxes
payable by you by reason of the  forgiveness of the interest  amount (but not by
reason  of the  forgiveness  of the  principal  amount),  and by  reason of your
receipt of the gross-up payment.  However,  if your employment is terminated (i)
prior to April 12,  2004 by the  Company  for Cause,  or (ii) prior to April 12,
2004 by reason of your death,  disability,  or voluntary  resignation,  then the
amount  of any  outstanding  balance  of  principal  and  interest  will  become
immediately due and payable.  After  termination of your employment,  if amounts
are due from you to repay the loan, and such amounts are otherwise  unpaid,  the
Company retains the right to offset such liability against amounts otherwise due
to you from the Company.
<PAGE>

         If the  foregoing  reflects  your  understanding  of the  terms of your
agreement  with the Company,  please so indicate by signing and returning a copy
of this  letter  to the  undersigned,  along  with a signed  copy of each of the
enclosures.
                                                           Very truly yours,

                                                           Illinova Corporation

                                                           By:
Charles E. Bayless

Accepted and agreed to this
____ day of April, 1999.


     William B. Conway Jr.



<TABLE> <S> <C>


<ARTICLE>                                           UT
<LEGEND>
     This schedule contains summary financial information extracted from the
     balance sheet, income statement and cash flow statement of Illinois Power
     Company and is qualified in its entirety by reference to the balance sheet,
     income statement and cash flow statement of Illinois Power Company.
</LEGEND>
<CIK>                         0000049816
<NAME>                        Illinois Power Company
<SUBSIDIARY>
   <NUMBER>                   0
   <NAME>                     0
<MULTIPLIER>                                   1,000,000
<CURRENCY>                                     Default

<S>                             <C>
<PERIOD-TYPE>                   3-mos
<FISCAL-YEAR-END>                              Dec-31-1999
<PERIOD-START>                                 Jan-01-1999
<PERIOD-END>                                   Mar-31-1999
<EXCHANGE-RATE>                                1
<BOOK-VALUE>                                   Per-book
<TOTAL-NET-UTILITY-PLANT>                      4470
<OTHER-PROPERTY-AND-INVEST>                    3
<TOTAL-CURRENT-ASSETS>                         422
<TOTAL-DEFERRED-CHARGES>                       808
<OTHER-ASSETS>                                 0
<TOTAL-ASSETS>                                 5703
<COMMON>                                       892
<CAPITAL-SURPLUS-PAID-IN>                      0
<RETAINED-EARNINGS>                            19
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 911
                          195
                                    53
<LONG-TERM-DEBT-NET>                           2028
<SHORT-TERM-NOTES>                             25
<LONG-TERM-NOTES-PAYABLE>                      0
<COMMERCIAL-PAPER-OBLIGATIONS>                 173
<LONG-TERM-DEBT-CURRENT-PORT>                  162
                      0
<CAPITAL-LEASE-OBLIGATIONS>                    51
<LEASES-CURRENT>                               20
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 2085
<TOT-CAPITALIZATION-AND-LIAB>                  5703
<GROSS-OPERATING-REVENUE>                      472
<INCOME-TAX-EXPENSE>                           14
<OTHER-OPERATING-EXPENSES>                     403
<TOTAL-OPERATING-EXPENSES>                     417
<OPERATING-INCOME-LOSS>                        55
<OTHER-INCOME-NET>                             7
<INCOME-BEFORE-INTEREST-EXPEN>                 62
<TOTAL-INTEREST-EXPENSE>                       39
<NET-INCOME>                                   23
                    4
<EARNINGS-AVAILABLE-FOR-COMM>                  19
<COMMON-STOCK-DIVIDENDS>                       0
<TOTAL-INTEREST-ON-BONDS>                      27
<CASH-FLOW-OPERATIONS>                        (27)
<EPS-BASIC>                                  0
<EPS-DILUTED>                                  0




</TABLE>


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