UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549



                                       8-K/A



                                 CURRENT REPORT




                     Pursuant to Section 13 or 15(d) of the


                         Securities Exchange Act of 1934



                Date of Report (Date of earliest event reported)
                                  July 16, 1999



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  62525
                        (217) 424-6600

   1-3004               Illinois Power Company              37-0344645
                        (an Illinois Corporation)
                        500 S. 27th Street
                        Decatur, IL  62525
                        (217) 424-6600



             Total number of sequentially numbered pages is 8.



Item 5.  Other Events

         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 estimates and projections of earnings.  Although Illinova
believes that this forward-looking  information is accurate,  its 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  information that has been provided. The reader is cautioned not
to put  undue  reliance  on this  forward-looking  information,  which  is not a
guarantee of future  performance and is subject to a number of uncertainties and
other factors, many of which are outside the control of Illinova.
         The following factors,  in addition to those discussed in the company's
Annual  Report on Form 10-K for the year ended Dec.  31,  1998,  and  subsequent
securities  filings,  could cause results to differ  materially  from management
expectations  as suggested by such  forward-looking  information:  the impact of
recent and future federal and state regulatory changes; the effects of increased
competition; the impact of fluctuations in commodity prices and customer demand;
the  impacts  of new  environmental  laws  and  regulations;  factors  affecting
non-utility  investments,  such  as  the  risk  of  doing  business  in  foreign
countries; construction and operation risks; and increases in financing costs.

ILLINOVA REPORTS SECOND-QUARTER EARNINGS

         On July 14, 1999, Illinova  Corporation  announced  second-quarter 1999
earnings of $8.7 million, or 12 cents per common share (basic and diluted). This
compares to a loss of $47 million,  or 66 cents per common  share,  for the same
period last year.
     Year-to-date  earnings  are $26.4  million,  or 38 cents per common  share,
compared to a loss of $24 million,  or 34 cents per common  share,  for the same
period in 1998.
         Based on financial  results for the first half of 1999,  and  excluding
the impacts of merger-related  expenses,  Illinova remains on target to meet its
earlier projection of $1.50 per share earnings for the year.
      Major factors affecting the current quarter's results were the 15
percent  residential  electric rate reduction  which began Aug. 1, 1998, and the
revised management services agreement for Clinton Power Station under which PECO
Energy assumed the plant's direct operating and capital expenses  starting April
1, 1999. The rate decrease  reduced  revenues by $14.9 million,  or 12 cents per
share,  while the  restructured  agreement for Clinton  trimmed IP's expenses by
$16.9 million, or 14 cents per share, from second quarter 1998.
      Second-quarter   1999  expenses  also  include  $7.3  million  related  to
Illinova's  recently  announced  merger  with  Dynegy;  $5  million  related  to
amortization   of  the   regulatory   asset   created   as  part  of  the   1998
quasi-reorganization; and $6.4 million in interest due to changes in net present
value of  decommissioning  assets  and  liabilities,  an  expense  that  will be

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reversed if the sale of Clinton  Power Station to AmerGen is completed by year's
end. Without these three expense items, earnings for the quarter would have been
$19.9 million, or approximately 27 cents per share.
      Last year's second-quarter loss of 66 cents per share was primarily due to
$107  million  in  higher   replacement   power  costs   following  last  June's
unprecedented  spike in market prices for electricity.  Without the $107 million
in higher replacement power costs,  second-quarter 1998 earnings would have been
24 cents per share.
      Illinova  Corporation  [NYSE:ILN],  headquartered in Decatur,  Ill., is an
energy services  holding company with $6.8 billion in assets and annual revenues
of $2.4  billion.  Its  subsidiaries  include  Illinois  Power,  an electric and
natural  gas  utility  that  serves  approximately   650,000  customers  over  a
15,000-square-mile  area of Illinois;  Illinova  Generating,  which  invests in,
develops and operates independent power projects worldwide;  and Illinova Energy
Partners,  which markets energy and energy-related services in the United States
and Canada.

RESTATEMENT  OF THE CONDENSED  CONSOLIDATED  STATEMENTS OF INCOME FOR THE TWELVE
MONTHS ENDED JUNE 30, 1999

In February 2000, Illinova and Illinois Power Company restated its statements of
income for the twelve months ended December 31, 1998,  which is reflected in the
condensed consolidated statements of income for the twelve months ended June 30,
1999.  The  restatement  reflects  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 for the twelve months ended June 30,
1999 by $196.5 million, or $2.78 per common share (basic and diluted).

Please see the attached Illinova Condensed Consolidated  Statements of Income.




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Item 7.  Financial Statements

            (A)      Financial Statements

            (99.1)   Illinova Consolidated Income Statements


                                       4


                             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)

                                            By /s/ Larry F. Altenbaumer
                                            ----------------------------
                                            Larry F. Altenbaumer
                                            President on behalf of
                                            Illinova Corporation



Date:    February 28, 2000


                             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)


                                            By /s/ Larry F. Altenbaumer
                                            ----------------------------
                                            Larry F. Altenbaumer
                                            President on behalf of
                                            Illinois Power Company


Date:    February 28, 2000


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Exhibit Index

The following  Exhibits are hereby filed as part of this Current  Report on Form
8-K/A:

Exhibit
Number            Description

99.1              Illinova Consolidated Income Statements



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