ILLINOIS POWER CO
10-K, 1998-03-11
ELECTRIC & OTHER SERVICES COMBINED
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                                  UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D. C. 20549


                                    FORM 10-K



[X]   ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF
      THE SECURITIES EXCHANGE ACT OF 1934 [NO FEE REQUIRED]


      For the Fiscal Year Ended December 31, 1997

                                       Or

[    ]  TRANSITION  REPORT  PURSUANT  TO SECTION  13 OR 15(d) OF THE  SECURITIES
        EXCHANGE ACT OF 1934 [NO FEE REQUIRED]


        For the transition period from      to



                        Registrant, State of 
                        Incorporation, Address
Commission              of Principal Executive                   I.R.S. Employer
File Number             Offices 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



<PAGE>


Securities registered pursuant to Section 12(b) of the Act:

Each of the following securities registered pursuant to Section 12(b) of the Act
are listed on the New York Stock Exchange.


Title of each class                                           Registrant
- -------------------                                           ----------

Common Stock (a)                                           Illinova Corporation



Preferred stock, cumulative,                              Illinois Power Company
$50 par value
4.08% Series   4.26% Series   4.70% Series
4.20% Series   4.42% Series

Mandatorily redeemable preferred securities of subsidiary
(Illinois Power Capital, L.P.)
9.45% Series

Trust originated preferred securities of subsidiary
(Illinois Power Financing 1)
8.00% Series

First mortgage bonds
6 1/2% Series due 1999                                   8 3/4% Series due 2021
7.95% Series due 2004

New mortgage bonds
6 1/8% Series due 2000                                   6 3/4% Series due 2005
5.625% Series due 2000                                       8% Series due 2023
6 1/2% Series due 2003                                   7 1/2% Series due 2025

(a) Illinova Common Stock is also listed on the Chicago Stock Exchange.

         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
registrants  were required to file such  reports),  and (2) have been subject to
such filing requirements for the past 90 days.

                         Illinova Corporation  Yes [X] No
                        Illinois Power Company Yes [X] No

         Indicate by check mark if disclosure of delinquent  filers  pursuant to
Item 405 of Regulation S-K is not contained  herein,  and will not be contained,
to the best of  registrants'  knowledge,  in  definitive  proxy  or  information
statements  incorporated  by  reference  in Part  III of this  Form  10-K or any
amendment to this Form 10-K.

                          Illinova Corporation    [X]
                          Illinois Power Company  [X]


<PAGE>


      The   aggregate   market  value  of  the  voting   common  stock  held  by
non-affiliates  of Illinova  Corporation at February 28, 1998, was approximately
$2.0  billion.  Illinova  Corporation  is the sole holder of the common stock of
Illinois Power Company. The aggregate market value of the voting preferred stock
held by  non-affiliates  of Illinois  Power  Company at February 28,  1998,  was
approximately   $46   million.   The   determination   of  stock   ownership  by
non-affiliates was made solely for the purpose of responding to this requirement
and the registrants are not bound by this determination for any other purpose.

      The number of shares of Illinova  Corporation  Common  Stock,  without par
value, outstanding on February 28, 1998, was 71,701,937.

      The number of shares of Illinois Power Company  Common Stock,  without par
value,  outstanding on February 28, 1998, was 66,215,292,  all of which is owned
by Illinova Corporation.

                    Documents Incorporated by Reference

1.   Portions of the 1997 Annual Report to Shareholders of Illinova  Corporation
     in the appendix to the Illinova Corporation Proxy Statement.  

                    (Parts I, II, III and IV of Form 10-K)

2.    Portions  of the 1997 Annual  Report to  Shareholders  of  Illinois  Power
      Company  in  the  appendix  to  the  Illinois  Power  Company  Information
      Statement.
                     (Parts I, II, III and IV of Form 10-K)

3.   Portions of the Illinova 1997 Proxy Statement.

                    (Part III of Form 10-K)

4.   Portions of the Illinois Power 1997 Information Statement.

                    (Part III of Form 10-K)


<PAGE>


                              ILLINOVA CORPORATION

                             ILLINOIS POWER COMPANY

                                    FORM 10-K

                   For the Fiscal Year Ended December 31, 1997

         This combined Form 10-K 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.

                                TABLE OF CONTENTS
                                                                              
Part I                                                                   Page

            Item 1. Business                                              6
                       General                                            6
                             Open Access and Competition                  7
                             Customer and Revenue Data                    8
                             Accounting Matters                           9
                             Dividends                                    9
                       IP Electric Business                               9
                             Overview                                     9
                             Soyland Power Cooperative, Inc.             10
                             Fuel Supply                                 11
                             Construction Program                        13
                             Clinton Power Station                       14
                               General                                   14
                               Decommissioning Costs                     15
                             Accounting Matters                          15
                       IP Gas Business                                   16
                             Gas Supply                                  16
                       Diversified Business Activities                   16
                       Environmental Matters                             17
                             Air Quality                                 17
                             Clean Air Act                               18
                             Global Warming                              18
                             Manufactured-Gas Plant Sites                18
                             Water Quality                               18
                             Other Issues                                19
                             Electric and Magnetic Fields                19
                             Environmental Expenditures                  19
                       Year 2000 Data Processing                         19
                       Research and Development                          20
                       Regulation                                        20
                       Executive Officers of Illinova Corporation        21
                       Executive Officers of Illinois Power Company      21
                       Operating Statistics                              22
            Item 2. Properties                                           22
            Item 3. Legal Proceedings                                    23
            Item 4. Submission of Matters to a Vote of
                    Security Holders                                     23

Part II

            Item 5. Market for Registrants' Common Equity
                    and Related Stockholder Matters                      24
            Item 6. Selected Financial Data                              24
            Item 7. Management's Discussion and Analysis
                    of Financial Condition and
                    Results of Operations                                24
            Item 8. Financial Statements and Supplementary
                      Data                                               25

<PAGE>


                          TABLE OF CONTENTS (Continued)

            Item 9.  Changes in and Disagreements With
                      Accountants on Accounting and
                      Financial Disclosure                               25

Part III

            Item 10. Directors and Executive Officers of
                      the Registrants                                    26
            Item 11. Executive Compensation                              26
            Item 12. Security Ownership of Certain
                      Beneficial Owners and Management                   26
            Item 13. Certain Relationships and Related
                      Transactions                                       26

Part IV

            Item 14.       Exhibits, Financial Statement
                              Schedules, and Reports on Form 8-K         27


Signatures                                                               29

Exhibit Index                                                            31


<PAGE>


                                     PART I

ITEM 1. Business
- ------
                                     General
                                     -------

         This report contains estimates,  projections and other  forward-looking
statements  that involve  risks and  uncertainties.  Actual  results or outcomes
could differ materially as a result of such important factors as: the outcome of
state and federal  regulatory  proceedings  affecting the  restructuring  of the
electric  and gas  utility  industries;  the  impacts  new laws and  regulations
relating to restructuring,  environmental,  and other matters,  have on Illinova
and its  subsidiaries;  the  effects of  increased  competition  on the  utility
businesses;  risks of owning and operating a nuclear facility; changes in prices
and cost of fuel; factors affecting non-utility investments, such as the risk of
doing  business in foreign  countries;  construction  and operation  risks;  and
increases in financing costs.

         Illinois  Power  Company  (IP) was  incorporated  under the laws of the
State of Illinois on May 25, 1923.

         Illinova Corporation  (Illinova) was incorporated under the laws of the
State of Illinois on May 27,  1994 and serves as the parent  holding  company of
four principal  operating  subsidiaries:  IP, Illinova Generating Company (IGC),
Illinova Energy Partners,  Inc. (IEP), and Illinova  Insurance Company (IIC). In
May  1996,  another  Illinova  subsidiary,  Illinova  Power  Marketing,  (IPMI),
consolidated its business  activities with those of Illinova Energy Services and
with the non-regulated  marketing activities of Illinova, in a new company named
IEP.  On April  1,  1997,  IEP and  IPMI  merged.  In the  merger,  IPMI was the
surviving corporation and subsequently changed its name to IEP.

         IP is engaged 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 is  affected  by  changes  in the  electric  utility
industry  driven  by  regulatory  and   legislative   initiatives  to  introduce
competition  and end monopoly  franchises in at least the generation side of the
business. One aspect of this change is "direct access," meaning giving customers
the freedom to purchase  electricity  from  suppliers  they choose.  In December
1997, electric regulatory restructuring  legislation was enacted by the Illinois
General Assembly and was signed by the Governor.  For a more detailed discussion
of these  developments,  refer to the "Open Access and  Competition"  section of
this item.

         IP provides funds to Illinova for operations and investments.  Illinova
accrues  interest due to IP on any borrowed  funds at a rate equal to the higher
of the rate that Illinova  would have to pay if it used a currently  outstanding
line of credit,  or IP's actual cost of the funds  provided.  At the end of each
quarter,  if needed,  IP effects a common  stock  repurchase  from  Illinova  by
accepting  shares  having a  market  value  equivalent  to the  amount  of funds
provided  to  Illinova  during the quarter  plus the  accrued  interest  for the
quarter.  During  1997,  IP  provided  approximately  $122  million  in funds to
Illinova  through  this stock  repurchase  feature.  IP also  provides  funds to
Illinova  in the form of cash  dividends  payable on the common  stock of IP. In
1997,  approximately  $92 million in such  dividends was declared and paid.  For
further  information on IP common stock  repurchases,  see Item 7  "Management's
Discussion and Analysis of Financial Condition and Results of Operation" of this
report.

         IGC  is  Illinova's  wholly-owned  independent  power  subsidiary.  IGC
invests in energy-related  projects throughout the world. For further discussion
of IGC, see the "Diversified Business Activities" section later in this item.

         IEP is Illinova's wholly-owned subsidiary that engages in the brokering
and  marketing  of  electric  power  and  gas and the  development  and  sale of

<PAGE>

energy-related  services.  For further  discussion of IEP, see the  "Diversified
Business Activities" section later in this item.

         IIC was  licensed  in August  1996 by the State of Vermont as a captive
insurance  company.  The  primary  business of IIC is to insure the risks of the
subsidiaries  of Illinova and risks related to or associated with their business
enterprises.

Open Access and Competition

         Competition  has  become a  dominant  issue  for the  electric  utility
industry. It has been promoted by federal legislation,  starting with the Public
Utility  Regulatory  Policies Act of 1978, which  facilitated the development of
co-generators and independent power producers.  Federal promotion of competition
continued with enactment of the Energy Policy Act of 1992,  which authorized the
Federal Energy Regulatory  Commission  (FERC) to mandate  wholesale  wheeling of
electricity  by  utilities  at the  request  of  certain  authorized  generating
entities  and  electric  service   providers.   Wheeling  is  the  transport  of
electricity  generated by one entity over  transmission and  distribution  lines
belonging to another entity.

         Competition  arises not only from  co-generation  or independent  power
production,  but also  from  municipalities  seeking  to  extend  their  service
boundaries  to  include  customers  being  served  by  utilities.  The  right of
municipalities  to have power  wheeled to them by utilities was  established  in
1973. IP has been obligated to wheel power for  municipalities  and cooperatives
in its territory since 1976.

         Further  competition may be introduced by state action, as has occurred
in Illinois,  or by federal  regulatory  action,  although the Energy Policy Act
currently  precludes the FERC from mandating  retail  wheeling.  Retail wheeling
involves the transport of electricity to end-use customers.  It is a significant
departure from traditional regulation in which public utilities have a universal
obligation to serve the public in return for protected  service  territories and
regulated  pricing designed to allow a reasonable  return on prudent  investment
and recovery of operating costs.

         On  December  16,  1997,   Illinois   Governor  Edgar  signed  electric
deregulation  legislation,  An Act in Relation to the  Competitive  Provision of
Utility  Services (House Bill 362).  House Bill 362 guarantees IP's  residential
customers a 15 percent decrease in base electric rates beginning August 1, 1998,
and an  additional  5  percent  decrease  effective  on May 1,  2002.  The  rate
decreases  are expected to result in revenue  reductions  of  approximately  $40
million in 1998,  approximately  $80  million in each of the years 1999  through
2001 and  approximately  $100  million in 2002,  based on  current  consumption.
Customers  with demand greater than 4 MW at a single site will be free to choose
their electric  generation  suppliers  ("direct  access") starting October 1999.
Customers with at least 10 sites which aggregate at least 9.5 MW in total demand
also will have  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.  In 1999,  rates  for  unbundled
delivery   services  will  be  established   in  proceedings   mandated  by  the
legislation.

Although the specified  residential  rate  reductions  and the  introduction  of
     direct access will lead to lower electric service revenues,  House Bill 362
     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,  adjusted to deduct: a) delivery
     charges the utility will continue to receive from the customer,  and b) the
     market value of the freed-up energy net of a mitigation factor,  which is a

<PAGE>

     percentage reduction of the transition charge amount. The mitigation factor
     is designed to provide  incentive for management to continue cost reduction
     efforts and generate new sources of revenue;  

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  lowered  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.  The impact on net
income will depend on, among other things, the amount of revenues earned and the
ongoing costs of doing business.

         Within the next several  months,  IP intends to seek Illinois  Commerce
Commission (ICC) approval for securitization financings up to $1.728 billion. It
plans to issue the transitional  funding instruments in two steps: 1) up to $864
million on or after August 1, 1998,  and 2) the  remainder on or after August 1,
1999. The transitional  funding  mechanism using securitized bonds as authorized
in House Bill 362 is  designed  to provide  these  bondholders  a prior claim on
future IP revenue.  This feature is intended to  facilitate  a favorable  credit
rating  which should  allow debt to be issued at an interest  rate  favorable to
that currently  available to IP. Proceeds would be used to refinance higher cost
debt and reduce the  capital  structure  through  the  purchase  of  outstanding
equity.

                  For  related   discussion   of  accounting   implications   of
deregulation,  see the "Accounting Matters" section under "IP Electric Business"
in this item.

         In 1996, IP received  approval from both the ICC and FERC to conduct an
open access  experiment  beginning in 1996 and ending on December 31, 1999.  The
experiment  allows  certain  industrial  customers to purchase  electricity  and
related services from other sources.  Currently,  17 customers are participating
in the experiment. Since its inception, the experiment has cost IP approximately
$11.2  million in lost revenue net of avoided  fuel cost and variable  operating
expenses.  This loss was  partially  offset by selling  the  surplus  energy and
capacity on the open market and by $2.7 million in transmission service charges.

         Competition  creates both risks and  opportunities.  At this time,  the
ultimate effect of competition on Illinova's consolidated financial position and
results of operations is uncertain.

Customer and Revenue Data
- -------------------------

         In  1997,  approximately  57  percent  and  14  percent  of  Illinova's
operating  revenues were derived from IP's sale of electricity and IP's sale and
transportation  of  natural  gas,  respectively.  Approximately  29  percent  of
Illinova's operating revenues came from its diversified enterprises in 1997. The
territory  served by IP comprises  substantial  areas in  northern,  central and
southern  Illinois,  including ten cities with  populations  greater than 30,000
(1990  Federal  Census  data).  IP  supplies  electric  service  at retail to an
estimated aggregate population of 1,265,000 in 310 incorporated  municipalities,
adjacent suburban and rural areas, and numerous  unincorporated  communities and
retail  natural  gas  service  to an  estimated  population  of  920,000  in 257
incorporated  municipalities  and adjacent areas. IP holds  franchises in all of
the 310  incorporated  municipalities  in which  it  furnishes  retail  electric
service and in all of the 257 incorporated  municipalities in which it furnishes
retail gas service.  At February 10, 1998,  IP served  577,322  active  electric
customers  (billable meters) and 408,269 active gas customers (billable meters).
These numbers do not include non-metered  customers such as street lights. Sales
of electricity and gas sales and transportation are affected by seasonal weather

<PAGE>

patterns,  and, therefore,  operating revenues and associated operating expenses
are not distributed evenly during the year.

         For more information, see "Note 13 - Segments of Business" on page a-30
and "Note 2 - Illinova  Subsidiaries"  on pages a-16 and a-17 of the 1997 Annual
Report to  Shareholders in the appendix to the Illinova Proxy Statement which is
incorporated herein by reference.

         To the extent that information incorporated by reference herein appears
identically  in  both  the  1997  Annual  Report  to  Shareholders  of  Illinova
Corporation  and the 1997  Annual  Report  to  Shareholders  of  Illinois  Power
Company,  reference  will be made  herein  only to the  1997  Annual  Report  to
Shareholders  of  Illinova  Corporation,  and such  reference  will be deemed to
include a reference to the 1997 Annual Report of Illinois Power Company.

Accounting Matters
- ------------------

         The Illinova consolidated  financial statements include the accounts of
Illinova  Corporation,  a holding  company;  IP, a combination  electric and gas
utility; IGC, a wholly-owned  subsidiary that invests in energy-related projects
and competes in the  independent  power market;  IEP, a wholly-owned  subsidiary
that  develops and markets  energy-related  services to the  unregulated  energy
market;  and IIC, a wholly-owned  subsidiary whose primary business is to insure
certain risks of Illinova and its subsidiaries.

         All  significant  intercompany  balances  and  transactions  have  been
eliminated from the consolidated financial statements. All non-utility operating
transactions  are included in the  sections  titled  "Diversified  Enterprises",
"Interest  Expense",  "Income  Taxes",  and "Other  Income and  Deductions",  in
Illinova's Consolidated Statements of Income.

         The IP  consolidated  financial  statements  include  the  accounts  of
Illinois  Power Capital,  L.P., a limited  partnership in which IP serves as the
general  partner and Illinois Power  Financing I, a statutory  business trust in
which IP serves as sponsor.

Dividends
- ---------

         On  December  10,  1997,  Illinova  declared a quarterly  common  stock
dividend at $.31 per share  payable  February 1, 1998.  On  February  11,  1998,
Illinova  declared a quarterly  common stock  dividend at $.31 per share payable
May 1, 1998.


                              IP Electric Business
                              --------------------

Overview
- --------

         IP supplies  electric service at retail to residential,  commercial and
industrial consumers in substantial  portions of northern,  central and southern
Illinois.  Electric  service at wholesale is supplied to numerous  utilities and
power marketing  entities,  as well as to the Illinois Municipal Electric Agency
(IMEA) as agent for 11  municipalities  and to Soyland Power  Cooperative,  Inc.
(Soyland)  for resale to its member  cooperatives.  For  additional  information
related to Soyland, see "Note 6 - Facilities Agreement" on page a-23 of the 1997
Annual Report to  Shareholders  in the appendix to the Illinova Proxy  Statement
which is  incorporated  herein by reference.  In 1997,  IP provided  interchange
power to 61 entities, including 37 power marketers.

         IP's  highest  system  peak  hourly  demand  (native  load) in 1997 was
3,532,000  kilowatts  on July 26,  1997.  IP's record for peak load is 3,667,000
kilowatts, set on July 13, 1995.
<PAGE>

         IP owns and  operates  generating  facilities  with a total net  summer
capability of 4,571,250  kilowatts.  The  generating  capability  comes from six
major steam  generating  plants and three  peaking  service  combustion  turbine
plants. See Item 2 "Properties" for further information.

         IP is a  participant,  together  with Ameren - Union  Electric  Company
(AmerenUE) and Ameren - Central Illinois Public Service Company (AmerenCIPS), in
the  Illinois-Missouri  Power Pool which was formed in 1952.  The Pool  operates
under an  interconnection  agreement which provides for the  interconnection  of
transmission  lines.  This  agreement has no expiration  date, but any party may
withdraw from the agreement by giving 36 months' notice to the other parties.

         IP,  AmerenCIPS and AmerenUE have a contract with the Tennessee  Valley
Authority (TVA) providing for the  interconnection  of the TVA system with those
of the three  companies to exchange  economy and  emergency  power and for other
working  arrangements.  This contract has no expiration  date, but any party may
withdraw  from the agreement by giving five years'  written  notice to the other
parties.

         IP also  has  interconnections  with  Indiana-Michigan  Power  Company,
Commonwealth Edison Company, Central Illinois Light Company, Mid-American Energy
Corporation,  Kentucky Utilities  Company,  Southern Illinois Power Cooperative,
Electric Energy Inc. (EEI),  Soyland, the City of Springfield,  Illinois and the
TVA.

         IP is a member of the Mid-America  Interconnected  Network,  one of ten
regional  reliability councils established to coordinate plans and operations of
member companies regionally and nationally.

         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.
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 Transmission Open Access Notice of Proposed Rulemaking,
Order No. 888. The parties have requested that the FERC rule on the joint filing
by no later than September 1, 1998, in order to allow the participants to create
the  infrastructure  needed to allow the  independent  system operator to become
operational.

         In 1996,  IP  transferred  through a dividend its 20%  ownership of the
capital stock of EEI to Illinova.  Illinova's interest was transferred to IGC in
1996. EEI was organized to own and operate a steam electric  generating  station
and related  transmission  facilities  near Joppa,  Illinois to supply  electric
energy to the U.S.
Department of Energy (DOE) for its project near Paducah, Kentucky.

Soyland Power Cooperative, Inc.
- -------------------------------

         For  discussion  of the  transfer to IP of  Soyland's  share of Clinton
Power Station  (Clinton) and the amended Power  Coordination  Agreement  between
Soyland  and IP, see "Note 6 -  Facilities  Agreement"  on page a-23 of the 1997
Annual Report to  Shareholders  in the appendix to the Illinova Proxy  Statement
which is incorporated herein by reference.



<PAGE>


Fuel Supply
- -----------

         Coal was used to generate approximately 97% of the electricity produced
by IP during 1997 with other fuels accounting for 3%. Based on current forecasts
through 2002,  after Clinton  returns to service the  percentages  of generation
attributable  to nuclear  fuel is  projected to increase to as much as 31% while
projected  generation  from coal will decline to about 69% during those years in
which there is not a scheduled refueling outage for Clinton.

         IP's rate  schedules  contain  provisions  for  passing  through to its
electric customers  increases or decreases in the cost of energy provided to its
native load customers  under the Uniform Fuel  Adjustment  Clause  (UFAC).  Such
costs include fuel and fuel transportation  costs, emission allowance costs, DOE
spent fuel  disposal  fees and costs of power  purchased  to serve  native load.
However,  on March 6, 1998, IP made the ICC filing  required for  elimination of
the UFAC. This will establish a new base fuel cost  recoverable in IP's electric
tariffs  effective on the date of the filing. As provided in House Bill 362, the
new base fuel cost is 1.287 cents per kwh,  which is equal to 91 percent of IP's
average  prudent and allowable fuel and purchased  power supply costs in the two
most recent years for which the ICC has  approved  the level of recovery.  Every
year UFAC cost recoveries are audited by the ICC in a reconciliation  proceeding
in which they may be adjusted upward for actual costs not recovered, or downward
through  a  disallowance  of costs  incurred.  By  opting  out of the  UFAC,  IP
eliminates exposure for potential disallowed replacement power costs for periods
after  December 31, 1996,  as those years will no longer be subject to the ICC's
annual reconciliation proceeding. This change will prevent IP from automatically
passing  through  increases  in  cost  and  will  expose  IP to  the  risks  and
opportunities  of price  volatility in these areas.  Prior to the elimination of
the UFAC,  under an IP petition  approved by the ICC on September 29, 1997, fuel
costs  charged to customers  were set at a maximum  level of 1.291 cents per kwh
until Clinton is back in service operating at least at a 65% capacity factor for
two  consecutive  months.  Whether  electric  energy  costs will  continue to be
recovered  in  revenues  from  customers  will  depend on a number  of  factors,
including  the number of  customers  served,  demand for electric  service,  and
changes in fuel cost components.  These variables may be influenced, in turn, by
market  conditions,  availability  of  generating  capacity,  future  regulatory
proceedings,  and  environmental  protection  costs,  among  other  things.  For
additional  information see the information under the sub-captions  "Revenue and
Energy Cost" of "Note 1 - Summary of  Significant  Accounting  Policies" on page
a-15 and "Fuel Cost  Recovery" of "Note 4 - Commitments  and  Contingencies"  on
page a-19 of the 1997  Annual  Report to  Shareholders  in the  appendix  to the
Illinova Proxy Statement which is incorporated herein by reference.

COAL - Coal is  expected  to be a major  source of fuel for  future  generation.
Through both long-term and short-term contracts, IP has obtained commitments for
the major portion of future coal requirements.  IP has new short-term  contracts
with two suppliers  which last through 2000 and a third new contract which lasts
through 2002.  Contracts  renegotiated in 1993 and 1994, which last through 1999
and 2010, are providing for the continued  economic use of high sulfur  Illinois
coal while IP complies with Phase I of the Clean Air Act Amendments  that became
effective  January 1, 1995.  IP is  currently  evaluating  its fuel  options for
compliance with Phase II of the Clean Air Act Amendments that becomes  effective
January 1, 2000.

         Spot  purchases  of coal in 1997  represented  9.0% of IP's  total coal
purchases.  IP believes that it will be able to obtain  sufficient  coal to meet
its future generating requirements.  However, IP is unable to predict the extent
to  which  coal  availability  and  price  may  fluctuate  in the  future.  Coal
inventories  on hand at December 31, 1997,  represented a 20-day supply based on
IP's average daily burn projections for 1998.

         IP continues to evaluate fuel options and  alternate  fuel delivery and
unloading  facilities  for  greater  flexibility  of  fuel  supplies.  New  rail
unloading  facilities at the Havana Station became  operational in the spring of
1996. In addition,  increased availability of nearby coal allowed for the return
of year-round coal generation at the Vermilion Station in June 1997.
<PAGE>

NUCLEAR  - IP leases  nuclear  fuel  from  Illinois  Power  Fuel  Company  (Fuel
Company). The Fuel Company, which is 50% owned by IP, was formed in 1981 for the
purpose of leasing  nuclear fuel to IP for Clinton.  Lease payments are equal to
the Fuel Company's  cost of fuel as consumed  (including  related  financing and
administrative  costs).  As of  December  31,  1997,  the  Fuel  Company  had an
investment in nuclear fuel of  approximately  $127  million.  IP is obligated to
make  subordinated  loans to the Fuel Company at any time the obligations of the
Fuel Company  which are due and payable  exceed the funds  available to the Fuel
Company.  At December 31, 1997, IP had no outstanding loans to the Fuel Company.
For  additional  information  relating to the nuclear fuel lease,  see "Note 8 -
Capital  Leases" on page a-25 of the 1997 Annual Report to  Shareholders  in the
appendix  to the  Illinova  Proxy  Statement  which is  incorporated  herein  by
reference.

         At December 31, 1997,  IP's net investment in nuclear fuel consisted of
$65 million of Uranium 308. This  inventory  represents  fuel used in connection
with the sixth and  seventh  reloads of  Clinton.  At  December  31,  1997,  the
unamortized  investment  of the nuclear fuel  assemblies  in the reactor was $62
million.

         IP has one  long-term  contract for the supply of uranium  concentrates
with Cameco,  a Canadian  corporation.  The Cameco contract was  renegotiated in
1994 to lower the price  and  provide  55% to 65% of  Clinton's  estimated  fuel
requirements through 2000. The decision to utilize Cameco for the additional 10%
of Clinton's fuel requirements is made the year before each delivery and depends
on the  estimated  price  and  availability  from the  spot  market  versus  the
estimated  contract  price.  The contract with Cameco is stated in terms of U.S.
dollars.

         Conversion  services  for the  period  1991-2001  are  contracted  with
Sequoyah Fuels.  Sequoyah Fuels closed its Oklahoma conversion plant in 1992 and
joined with Allied Chemical Company to form a marketing  company named CoverDyn.
All  conversion  services  will be  performed at Allied's  Metropolis,  Illinois
facility, but Sequoyah Fuels retains the contract with IP.

         IP has a utility services contract for uranium enrichment  requirements
with the DOE  which  provides  70% of the  enrichment  requirements  of  Clinton
through  September  1999.  The  remaining 30% has been  contracted  with the DOE
through an amendment to its incentive  pricing plan through 1999. This amendment
allows IP to either  purchase  the  enrichment  services at the DOE's  incentive
price or provide  electricity at DOE's Paducah,  Kentucky enrichment plant at an
agreed exchange rate.

         A contract with General  Electric  Company  provides  fuel  fabrication
requirements for the initial core and approximately 19 reloads, or through 2019.

         Beyond the stated commitments,  IP may enter into additional  contracts
for uranium  concentrates,  conversion to uranium  hexafluoride,  enrichment and
fabrication.

         Currently, commercial reprocessing of spent nuclear fuel is not allowed
in the U.S. The Nuclear Waste Policy Act of 1982 (NWPA) was enacted to establish
a  government  policy  with  respect  to  disposal  of  spent  nuclear  fuel and
high-level  radioactive waste. On July 6, 1984, as required by NWPA, IP signed a
contract  with the DOE for  disposal of spent  nuclear  fuel  and/or  high-level
radioactive  waste.  Under the contract,  IP is required to pay the DOE one mill
(one-tenth of a cent) per net  kilowatt-hour  (one dollar per  megawatt-hour) of
electricity  generated and sold. IP had been  recovering this amount through its
UFAC  subject to UFAC  limitations  discussed  under the heading  "Fuel  Supply"
previously  in this item.  With the  elimination  of UFAC,  IP may  continue  to
recover some portion of these costs  through the new base fuel cost  included in
electric tariffs.

         On June 20, 1994,  IP,  along with other  utilities  and state  utility
commissions,  filed an action in the D.C.  Circuit  Court of Appeals  asking the
Court to rule that the DOE is obligated to take responsibility for spent nuclear

<PAGE>

fuel by  January  31,  1998  under the NWPA.  The  utilities  asked the Court to
confirm  the  DOE's  commitment  and to order the DOE to  develop  a  compliance
program with appropriate deadlines. The utilities also asked for relief from the
ongoing funding requirements or to have an escrow account established for future
funds paid to DOE. Subsequently,  the petition was amended to seek, in addition,
relief in the form of specific performance.

         A  three-judge  panel ruled in July 1996 that the DOE's  obligation  to
take spent fuel, by the January 1998 date  specified in the NWPA, is binding and
unconditional.  The DOE notified  utilities in December  1996 that it may not be
able to meet the 1998  deadline,  and solicited  utility  suggestions  on how to
accommodate the potential  delay.  In January 1997,  petitions were filed in the
D.C.  Circuit  Court of  Appeals  by IP and other  utilities  and state  utility
commissions,  seeking further enforcement of DOE's obligation.  In response, the
Court has reaffirmed its ruling that the DOE  obligation is  unconditional,  but
has not granted injunctive  relief.  This means that the Court has found the DOE
in breach of DOE's obligation but has not literally  ordered the DOE to perform.
The litigation is continuing.

         IP has on-site  storage  capacity that will  accommodate its spent fuel
storage needs until the year 2007, based on current operating levels. If by that
date the DOE has not complied with its statutory  obligation to dispose of spent
fuel, and IP has continued to operate the plant, IP will have to use alternative
means of disposal, such as dry storage in casks on site or transportation of the
fuel rods to private or collectively-owned utility repositories. IP is currently
an equity  partner with seven other  utilities in an effort to develop a private
temporary  repository.  Attempts to reach  agreement  with the Mescalaro  Apache
Tribe of New Mexico  ended in early 1996;  however,  the group signed a lease in
December  1996 with the  Goshute  Tribe to use land on its Utah  reservation.  A
spent fuel  storage  license  was filed with the Nuclear  Regulatory  Commission
(NRC) in 1997, initiating a process which will take the NRC up to three years to
complete.  Continued  participation  in  the  partnership  will  depend  on  the
technological and economic viability of the project.  Safe, dry, on-site storage
is  technologically  feasible,  but is subject to licensing and local permitting
requirements, for which there may be effective opposition.

         Under the Energy Policy Act of 1992, IP is responsible for a portion of
the  cost  to  decontaminate  and  decommission  the  DOE's  uranium  enrichment
facilities. Each utility is assessed an annual fee for a period of fifteen years
based on quantities  purchased from the DOE  facilities  prior to passage of the
Act.  At  December  31,  1997,  IP has a  remaining  liability  of $4.3  million
representing  future  assessments.  IP  had  been  recovering  these  costs,  as
amortized,  through its UFAC  subject to UFAC  limitations  discussed  under the
heading "Fuel Supply"  previously in this item. With the elimination of UFAC, IP
may continue to recover  some  portion of these costs  through the new base fuel
cost included in electric tariffs.

OIL and GAS - IP used  natural gas and oil to generate  1.0% of the  electricity
produced  in 1997.  IP has not  experienced  difficulty  in  obtaining  adequate
supplies  of these  resources.  However,  IP is unable to predict  the extent to
which oil and gas availability and price may fluctuate in the future.

         Reference is made to the section "Environmental  Matters" hereunder for
information regarding pollution control matters relating to IP's fuel supply.

Construction Program
- --------------------

         To  meet  anticipated  needs,  Illinova  and IP  have  used  internally
generated  funds and  external  financings.  The timing  and amount of  external
financings  depend primarily on economic and financial market  conditions,  cash
needs and capitalization ratio objectives.

         For more information on Illinova's  construction program and liquidity,
see "Note 4 -  Commitments  and  Contingencies"  on page a-19 of the 1997 Annual
Report to  Shareholders in the appendix to the Illinova Proxy Statement which is
incorporated  herein  by  reference;  "Note 5 - Lines of Credit  and  Short-Term

<PAGE>

Loans" on page a-23 of the 1997 Annual Report to Shareholders in the appendix to
the Illinova Proxy  Statement  which is  incorporated  herein by reference;  and
"Capital  Resources and Requirements" in "Management's  Discussion and Analysis"
on pages a-8 and a-9 of the 1997 Annual Report to  Shareholders  in the appendix
to the Illinova Proxy Statement which is incorporated herein by reference.

         For more information on IP's  construction  program and liquidity,  see
"Note 3 -  Commitments  and  Contingencies"  on pages  a-18 and a-19 of the 1997
Annual Report to Shareholders in the appendix to the Illinois Power  Information
Statement which is incorporated  herein by reference;  "Note 4 - Lines of Credit
and Short-Term  Loans" on page a-23 of the 1997 Annual Report to Shareholders in
the appendix to the Illinois Power  Information  Statement which is incorporated
herein by reference;  and "Capital  Resources and Requirements" in "Management's
Discussion  and  Analysis" on pages a-7 through a-9 of the 1997 Annual Report to
Shareholders in the appendix to the Illinois Power  Information  Statement which
is incorporated herein by reference.

Clinton Power Station
- ---------------------

         General
         -------

          In March 1997, the NRC issued an order approving transfer to IP of the
Clinton  operating  license  related to Soyland's  13.2% ownership in connection
with the transfer  from  Soyland to IP of all of Soyland's  interest in Clinton.
Soyland's  title to the plant and directly  related  assets such as nuclear fuel
was  transferred  to IP in May 1997.  Soyland's  nuclear  decommissioning  trust
assets were  transferred to IP in May 1997,  consistent  with IP's assumption of
all  of   Soyland's   ownership   obligations   including   those   related   to
decommissioning.

         Clinton was placed in service in 1987 and represents  approximately 20%
of IP's installed generation capacity. For more information on the Clinton Power
Station, see "Note 3 - Clinton Power Station" on pages a-17 and a-18 of the 1997
Annual Report to  Shareholders  in the appendix to the Illinova Proxy  Statement
which is incorporated herein by reference.

         In  September  1996,  a leak in a  recirculation  pump  seal  caused IP
operations  personnel  to shut  down  Clinton.  As of the  date of this  report,
Clinton has not resumed operation.

         In January  1997 and again in June 1997,  the NRC named  Clinton  among
plants  having a trend of declining  performance.  In June 1997, IP committed to
conduct an Integrated  Safety  Assessment  (ISA) to thoroughly  assess Clinton's
performance.  The ISA was conducted by a team of 30  individuals  with extensive
nuclear  experience and no substantial  previous  involvement at Clinton.  Their
report  concluded that the underlying  reasons for the  performance  problems at
Clinton were  ineffective  leadership  throughout the  organization in providing
standards  of  excellence,  complacency  throughout  the  organization,  barrier
weaknesses and weaknesses in teamwork.  In late October,  a team commissioned by
the NRC performed an evaluation to validate the ISA results.  In December,  this
team concluded that the findings of the ISA accurately  characterized  Clinton's
performance deficiencies and their causes.

         On January 5, 1998,  IP and PECO Energy  Company  (PECO)  announced  an
agreement  under  which  PECO will  provide  management  services  for  Clinton.
Although a PECO team will help  manage the plant,  IP will  continue to maintain
the operating  license for Clinton and retain  ultimate  oversight of the plant.
PECO  employees  will assume  senior  positions  at Clinton,  but the plant will
remain  primarily  staffed by IP  employees.  IP made this  decision  based on a
belief that  bringing in PECO's  experienced  management  team would be the most
efficient way to get Clinton back on line and  operating at a superior  level as
quickly as possible.

         On  January  21,  1998,  the NRC  placed  Clinton  on its Watch List of
nuclear plants that require additional regulatory oversight because of declining
performance.  Twice a year the NRC  evaluates the  performance  of nuclear power

<PAGE>

plants in the United  States  and  identifies  those  which  require  additional
regulatory  oversight.  Once  placed on the Watch List a plant must  demonstrate
consistent improved performance before it is removed from the list. The NRC will
monitor Clinton more closely than plants not on the Watch List. This may include
increased inspections, additional required documentation,  NRC-required approval
of processes and procedures, and higher-level NRC oversight.

         The NRC has advised IP that it must submit a written  report to the NRC
at least two weeks prior to  restarting  Clinton,  giving the agency  reasonable
assurance  that IP's actions to correct  recurring  weaknesses in the corrective
action program have been effective. After the report is submitted, the NRC staff
plans to meet with IP's management to discuss the plant's readiness for restart.
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.  The
magnitude  of  these  costs  and  lost   opportunities  is  unknown  because  of
uncertainty  regarding  the timing of Clinton's  return to service and uncertain
future market conditions.

         Decommissioning Costs
         ---------------------

         IP is  responsible  for the costs of  decommissioning  Clinton  and for
spent nuclear fuel disposal costs. IP is collecting future decommissioning costs
through its electric  rates based on an  ICC-approved  formula that allows IP to
adjust rates annually for changes in decommissioning  cost estimates and through
its Power Coordination Agreement with Soyland. Illinois deregulation legislation
provides for the continued recovery of decommissioning  costs from IP's delivery
customers. For more information on the decommissioning costs related to Clinton,
see  "Decommissioning  and Nuclear Fuel  Disposal" in "Note 4 - Commitments  and
Contingencies"  on page a-20 of the 1997 Annual  Report to  Shareholders  in the
appendix  to the  Illinova  Proxy  Statement  which is  incorporated  herein  by
reference.

Accounting Matters
- ------------------

         Prior to the passage of House Bill 362, IP  prepared  its  consolidated
financial  statements  in  accordance  with  Statement of  Financial  Accounting
Standards (FAS) 71, "Accounting for the Effects of Certain Types of Regulation."
Reporting under FAS 71 allows companies whose service obligations and prices are
regulated to maintain  assets on their balance  sheets  representing  costs they
expect to  recover  from  customers,  through  inclusion  of such costs in their
future  rates.  In July 1997,  the Emerging  Issues Task Force of the  Financial
Accounting   Standards  Board  (EITF)  concluded  that  application  of  FAS  71
accounting  should be  discontinued  at the date of  enactment  of  deregulation
legislation  for  business  segments for which a plan of  deregulation  has been
established.  The EITF further  concluded that regulatory assets and liabilities
that  originated  in the portion of the  business  being  deregulated  should be
written off unless their  recovery is  specifically  provided for through future
cash flows from the regulated portion of the business.

         Because  House Bill 362 provides for  market-based  pricing of electric
generation  services,  IP discontinued  application of FAS 71 for its generating
segment as of December 1997. IP evaluated its regulatory  assets and liabilities
associated  with its generation  segment and  determined  that recovery of these
costs was not probable  through rates charged to transmission  and  distribution
customers, the regulated portion of the business.

         IP wrote off  generation-related  regulatory  assets and liabilities of
approximately  $195 million (net of income  taxes) in December  1997.  These net
assets  related  to  previously  incurred  costs  that had been  expected  to be
collected through future revenues, including deferred Clinton costs, unamortized
gains  and  losses  on  reacquired  debt,  recoverable  income  taxes  and other
generation-related  regulatory assets. At December 31, 1997, IP's net investment
in generation  facilities was $3.5 billion and was reflected in "Utility  Plant,
at Original Cost" on IP's balance sheet.
<PAGE>

         In addition,  IP evaluated its generation  segment plant investments to
determine if they had been impaired as defined in FAS 121,  "Accounting  for the
Impairment of Long-Lived  Assets and Long-Lived  Assets to Be Disposed Of." This
evaluation  determined  that future  revenues  were expected to be sufficient to
recover the costs of its generation  segment plant  investments and as a result,
no plant  write-downs were necessary.  However,  ultimate  recovery depends on a
number of factors and variables  including market conditions and IP's ability to
operate its generation assets efficiently.

         The provisions of House Bill 362 allow for an  acceleration in the rate
at which any  utility-owned  assets are  expensed  without  regulatory  approval
provided  such  charges  are  consistent  with  generally  accepted   accounting
principles.  Under  this  legislation,  up to an  aggregate  of $1.5  billion in
additional expense for  generation-related  assets could be accelerated  through
the year 2008.  This reduction in the net book value of IP's  generation-related
assets should help position IP to operate  competitively  and  profitably in the
changing  business  environment.  This  accelerated  charge  would have a direct
impact on earnings but not on cash flows.


                                 IP Gas Business
                                 ---------------

         IP  supplies  retail  natural  gas  service to an  estimated  aggregate
population  of 920,000 in 257  incorporated  municipalities,  adjacent  suburban
areas and numerous unincorporated communities. IP does not sell gas for resale.

         IP's rate schedules  contain  provisions for passing through to its gas
customers  increases or decreases in the cost of purchased gas. For  information
on revenue and energy costs,  see the  sub-caption  "Revenue and Energy Cost" of
"Note 1 - Summary of Significant  Accounting  Policies" on page a-15 of the 1997
Annual Report to  Shareholders  in the appendix to the Illinova Proxy  Statement
that is incorporated herein by reference.

         IP has eight  underground gas storage fields having a total capacity of
approximately  15.2 million  MMBtu and a total  deliverability  on a peak day of
about  347,000  MMBtu.  In  addition to the  capacity  of the eight  underground
storage  fields,  IP has  contracts  with  various  natural  gas  suppliers  and
producers  for 9.9 million  MMBtu of  underground  storage  capacity and a total
deliverability on a peak day of 160,000 MMBtu.  Operation of underground storage
permits IP to increase  deliverability to its customers during peak load periods
by taking gas into storage during the off-peak months.

         IP owns one active  liquefied  petroleum  gas plant having an aggregate
peak-day  deliverability  of about 20,000 MMBtu for peak-shaving  purposes.  Gas
properties include approximately 8,000 miles of mains.

         IP  experienced  its 1997 peak-day send out of 705,725 MMBtu of natural
gas on January 10, 1997.  This  compares  with IP's record  peak-day send out of
857,324 MMBtu of natural gas on January 10, 1982.

Gas Supply
- ----------

         IP has  contracts  with  six  interstate  pipeline  companies  for firm
transportation  and storage  services.  These contracts have varying  expiration
dates  ranging  from  1998  to  2002.  IP also  enters  into  contracts  for the
acquisition of natural gas supply.  Those  contracts  range in duration from one
month to five months.


                         Diversified Business Activities
                         -------------------------------

         IGC, a wholly-owned  subsidiary of Illinova,  invests in energy-related
projects  throughout the world.  IGC is an equity partner with Tenaska,  Inc. in

<PAGE>

four  natural  gas-fired  generation  plants,  of which  three  plants  totaling
approximately  700 megawatts  (MW) are in operation and one 240 MW plant has had
construction suspended.  Tenaska, Inc. is an Omaha,  Nebraska-based developer of
independent  power  projects  throughout  the  United  States.  IGC also owns 50
percent of the North American  Energy Services  Company (NAES).  NAES supplies a
broad range of operations,  maintenance  and support  services to the world-wide
independent power generation industry and operates the Tenaska generation plants
in which IGC has an equity  interest.  IGC is an equity  partner  in the  Indeck
North  American  Power Fund  (Fund).  The Fund has  generation  projects in Long
Beach, California, and Pepperell,  Massachusetts. In addition to these ventures,
IGC is involved in  generation  projects in Teesside,  England;  Puerto  Cortez,
Honduras;  Zhejiang  Province and Hunan  Province,  People's  Republic of China;
Aguaytia, Peru; Old Harbour, Jamaica;  Barranquilla,  Columbia; and Balochistan,
Pakistan. In August 1996, Illinova's interest in the 1000 MW coal-fired plant in
Joppa, Illinois was transferred to IGC.

         IEP is Illinova's wholly-owned subsidiary that engages in the brokering
and marketing of electric power and gas,  respectively;  and the development and
sale of energy-related products and services. In May 1995, IEP obtained approval
from the FERC to conduct  business as a marketer  of  electric  power and gas to
various customers outside of IP's present service territory.  In September 1995,
IEP began buying and selling wholesale electricity in the Western United States.
IEP owns 50 percent of Tenaska Marketing  Ventures (TMV). TMV focuses on natural
gas marketing in the Midwestern  United States.  IEP and TMV have formed Tenaska
Marketing Canada to market natural gas in Canada. In July 1996, IP received FERC
approval to sell  electricity  to IEP without  prior  transaction  approval from
FERC.

         For more  information on the  activities of the Illinova's  diversified
enterprises,  see "Note 2 - Illinova Subsidiaries" on pages a-16 and a-17 of the
1997  Annual  Report to  Shareholders  in the  appendix  to the  Illinova  Proxy
Statement which is incorporated herein by reference.


                              Environmental Matters
                              ---------------------

         IP is subject to regulation by certain federal and Illinois authorities
with respect to  environmental  matters and may in the future become  subject to
additional  regulation by such authorities or by other federal,  state and local
governmental bodies.  Existing regulations  affecting IP are principally related
to air and water quality, hazardous wastes and toxic substances.

Air Quality
- -----------

         Pursuant  to the  Federal  Clean  Air  Act  (Act),  the  United  States
Environmental  Protection  Agency  (USEPA) has  established  ambient air quality
standards for air pollutants  which, in its judgment,  have an adverse effect on
public  health  or  welfare.  The Act  requires  each  state to  adopt  laws and
regulations,  subject to USEPA  approval,  designed to achieve  such  standards.
Pursuant to the Illinois  Environmental  Protection Act, the Illinois  Pollution
Control  Board  (Board)  adopted  and,  along  with the  Illinois  Environmental
Protection  Agency  (IEPA),  is enforcing a  comprehensive  set of air pollution
control  regulations  which  include  emission  limitations,  permit  issuances,
monitoring and reporting requirements.

         The air  pollution  regulations  of the  Board  impose  limitations  on
emissions of particulate,  sulfur dioxide, carbon monoxide,  nitrogen oxides and
various other pollutants. Enforcement of emission limitations is accomplished in
part through the regulatory  permitting  process.  IP's practice is to obtain an
operating  permit for each source of regulated  emissions.  Presently,  it has a
total of  approximately  100 permits for emission  sources at its power stations
and other  facilities,  expiring  at various  times.  In  addition to having the
requisite operating permits, each source of regulated emissions must be operated
within the regulatory limitations on emissions.  Verification of such compliance
is usually accomplished by reports to regulatory  authorities and inspections by
such authorities.
<PAGE>

         In  accordance  with the  requirements  of the  Illinois  Clean Air Act
Permit Program (CAAPP), IP submitted new air permit applications for each of its
generating  facilities in 1995. The IEPA will review these  applications  and is
expected to issue CAAPP permits in 1998.

         In addition to the sulfur  dioxide  emission  limitations  for existing
facilities,  both  the  USEPA  and the  State of  Illinois  adopted  New  Source
Performance  Standards (NSPS) applicable to coal-fired generating units limiting
emissions  to 1.2 pounds of sulfur  dioxide per million Btu of heat input.  This
standard is applicable to IP's Unit 6 at the Havana Power  Station.  The federal
NSPS also limit nitrogen oxides,  opacity and particulate  emissions and imposes
certain monitoring requirements.  In 1977 and 1990 the Act was amended and, as a
result,  USEPA has adopted more  stringent  emission  standards for new sources.
These standards would apply to any new plant constructed by IP.

Clean Air Act
- -------------

         For information on the impacts of the Clean Air Act Amendments of 1990,
see "Environmental  Matters" in "Note 4 - Commitments and Contingencies" on page
a-21 of the 1997 Annual Report to  Shareholders  in the appendix to the Illinova
Proxy Statement which is incorporated herein by reference.

Global Warming
- --------------

         For  information on the impacts of the  international  negotiations  to
reduce  greenhouse  gas emissions  and the Kyoto  Protocol,  see  "Environmental
Matters" in "Note 4 - Commitments  and  Contingencies"  on page a-21 of the 1997
Annual Report to  Shareholders  in the appendix to the Illinova Proxy  Statement
which is incorporated herein by reference.

Manufactured-Gas Plant Sites
- ----------------------------

         IP's estimated liability for MGP site remediation is $65 million.  This
amount  represents  IP's current best estimate of the cost that it will incur in
remediation  of the 24 MGP  sites for which it is  responsible.  Because  of the
unknown and unique  characteristics at each site, IP cannot presently  determine
its ultimate liability for remediation of the sites.

         IP is currently  recovering MGP site  remediation  costs through tariff
riders approved by the ICC.  Accordingly,  IP has recorded a regulatory asset on
its balance  sheet  totaling  $65 million as of December  31,  1997.  Management
expects that cleanup costs will be fully recovered from IP's customers.

         In October  1995,  to offset the burden  imposed on its  customers,  IP
initiated  litigation  against a number of  insurance  carriers.  As of February
1998,  settlements or settlements in principle have been reached with all of the
carriers.  Dismissal  of the  litigation  is  proceeding  pending the  necessary
documentation  with  the  court.  The  settlement  proceeds  recovered  from the
carriers will offset a significant  portion of the remediation costs and will be
credited  to  customers  through  the  tariff  rider  mechanism  which  the  ICC
previously approved.

Water Quality
- -------------

         The Federal Water Pollution Control Act Amendments of 1972 require that
National Pollutant Discharge Elimination System (NPDES) permits be obtained from
USEPA (or, when delegated, from individual state pollution control agencies) for
any discharge into  navigable  waters.  Such  discharges are required to conform
with the  standards,  including  thermal,  established  by USEPA  and also  with
applicable state standards.

         Enforcement of discharge  limitations is  accomplished  in part through
the regulatory  permitting  process similar to that described  previously  under

<PAGE>

"Air Quality".  Presently, IP has approximately two dozen permits for discharges
at its power stations and other facilities, which must be periodically renewed.

         In  addition  to  obtaining  such  permits,  each  source of  regulated
discharges  must be operated  within the  limitations  prescribed  by applicable
regulations.   Verification  of  such  compliance  is  usually  accomplished  by
monitoring  results  reported to regulatory  authorities and inspections by such
authorities.

         The  Clinton  permit was  reissued  in the third  quarter of 1995.  The
Havana  Power  Station  permit was  reissued in the first  quarter of 1996.  The
Hennepin  Power Station permit  application  for reissuance was submitted in the
fourth  quarter of 1996 and is not  expected  until 1998.  The  Vermilion  Power
Station  permit was reissued in the fourth quarter of 1996. The Wood River Power
Station  permit was  reissued in the first  quarter of 1996.  The Baldwin  Power
Station permit was reissued in the first quarter of 1998.

Other Issues
- ------------

         Hazardous and  non-hazardous  wastes generated by IP must be managed in
accordance  with  federal  regulations  under the Toxic  Substances  Control Act
(TSCA), the Comprehensive Environmental Response, Compensation and Liability Act
and the  Resource  Conservation  and Recovery  Act (RCRA) and  additional  state
regulations  promulgated under both RCRA and state law. Regulations  promulgated
in 1988  under RCRA  govern  IP's use of  underground  storage  tanks.  The use,
storage,  and  disposal of certain  toxic  substances,  such as  polychlorinated
biphenyls  (PCBs)  in  electrical  equipment,  are  regulated  under  the  TSCA.
Hazardous substances used by IP are subject to reporting  requirements under the
Emergency  Planning and  Community-Right-To-Know  Act. The State of Illinois has
been delegated authority for enforcement of these regulations under the Illinois
Environmental  Protection  Act and state  statutes.  These  requirements  impose
certain monitoring, recordkeeping,  reporting and operational requirements which
IP has  implemented  or is  implementing  to  assure  compliance.  IP  does  not
anticipate that compliance will have a material  adverse effect on its financial
position or results of operations.

Electric and Magnetic Fields
- ----------------------------

         For  information  on Electric and Magnetic  Fields,  see  "Electric and
Magnetic Fields" in "Note 4 Commitments and  Contingencies"  on page a-22 of the
1997  Annual  Report to  Shareholders  in the  appendix  to the  Illinova  Proxy
Statement which is incorporated herein by reference.

Environmental Expenditures
- --------------------------

         Operating  expenses  for  environmentally-related  activities  were $49
million in 1997  (including the incremental  costs of alternative  fuels to meet
environmental requirements). IP's net capital expenditures (including AFUDC) for
environmental  protection  programs  were  approximately  $7  million  in  1997.
Accumulated net capital expenditures since 1969 have reached  approximately $800
million.


                            Year 2000 Data Processing
                            -------------------------

         In November  1996,  Illinova  deployed a project team to coordinate the
identification,  evaluation,  and  implementation of changes to computer systems
and applications necessary to achieve a year 2000 date conversion with no effect
on customers or disruption to business operations.

         These  actions are  necessary to ensure that  systems and  applications
will recognize and process  coding for the year 2000 and beyond.  Major areas of
potential  business impact have been identified and initial  conversion  efforts
are  underway.  Illinova also is  communicating  with third parties with whom it

<PAGE>

does business to ensure  continued  business  operations.  The cost of achieving
year 2000 compliance is estimated to be at least $14 million through 1999.

         Contingency  plans for operating  without year 2000 compliance have not
been  developed.  Such activity  will depend on assessment of progress.  Project
completion is planned for the fourth quarter of 1999.


                            Research and Development
                            ------------------------

         Illinova's  research and  development  expenditures  for 1997  included
approximately  $5.4  million for IP and $2.0 million for  Illinova.  In 1996 and
1995, Illinova's research and development expenditures consisting entirely of IP
expenditures, were $5.4 million and $5.5 million, respectively.


                                   Regulation
                                   ----------

         The Illinois Public Utilities Act was significantly modified in 1997 by
House Bill 362, 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 customers at rates to be determined in a future ICC proceeding.

         Illinova  and IP are  exempt  from  all the  provisions  of the  Public
Utility Holding Company Act of 1935 except Section 9(a)(2) thereof. That section
requires  approval of the  Securities and Exchange  Commission  prior to certain
acquisitions  of any  securities  of other  public  utility  companies or public
utility holding companies.

         IP is subject to regulation  under the Federal Power Act by the FERC as
to rates and charges in connection  with the  transmission of electric energy in
interstate  commerce  and the sale of such  energy at  wholesale  in  interstate
commerce,  the issuance of debt securities  maturing in not more than 12 months,
accounting and depreciation policies,  interaction with affiliates,  and certain
other  matters.  The FERC has  declared  IP exempt  from the Natural Gas Act and
related FERC orders, rules and regulations.

         IP is subject to the  jurisdiction  of the NRC with respect to Clinton.
NRC   regulations   control  the  granting  of  permits  and  licenses  for  the
construction  and operation of nuclear power  stations and subject such stations
to continuing review and regulation. Additionally, the NRC review and regulatory
process   covers   decommissioning,   radioactive   waste,   environmental   and
radiological aspects of such stations.

         IP is subject to the jurisdiction of the Illinois Department of Nuclear
Safety (IDNS) with respect to Clinton.  IDNS and the NRC entered a memorandum of
understanding which allows IDNS to review and regulate nuclear safety matters at
state  nuclear  facilities.  The  IDNS  review  and  regulatory  process  covers
radiation safety,  environmental safety, non-nuclear pressure vessels, emergency
preparedness and emergency response.


<PAGE>



                   Executive Officers of Illinova Corporation
                   ------------------------------------------

Name of Officer               Age                   Position
- ---------------               ---                   --------

Larry D. Haab                 60       Chairman, President and Chief
                                       Executive Officer
Larry F. Altenbaumer          49       Chief Financial Officer, Treasurer
                                       and Controller
Leah Manning Stetzner         49       General Counsel and Corporate 
                                       Secretary


     Mr. Haab was elected  Chairman,  President and Chief  Executive  Officer in
December 1993.

     Mr.  Altenbaumer  was  elected  Chief  Financial  Officer,   Treasurer  and
Controller in June 1994.

     Ms. Stetzner was elected  General  Counsel and Corporate  Secretary in June
1994.

        The executive officers are elected annually by the Board of Directors at
the first  meeting of the Board held after the annual  meeting of  shareholders,
and hold office  until their  successors  are duly elected or until their death,
resignation or removal by the Board.

                  Executive Officers of Illinois Power Company
                  --------------------------------------------

Name of Officer                Age              Position
- ---------------                ---              --------

Larry D. Haab                  60     Chairman, President and Chief 
                                      Executive Officer
Larry F. Altenbaumer           49     Senior Vice President and Chief
                                      Financial Officer
Paul L. Lang                   57     Senior Vice President
Walter G. MacFarland, IV       48     Senior Vice President and Chief 
                                      Nuclear Officer
John G. Cook                   50     Senior Vice President
Richard W. Eimer, Jr.          49     Vice President
Kim B. Leftwich                50     Vice President
Robert D. Reynolds             41     Vice President
Robert A. Schultz              57     Vice President
Leah Manning Stetzner          49     Vice President, General Counsel 
                                      and Corporate Secretary
Cynthia G. Steward             40     Controller
Eric B. Weekes                 46     Treasurer

        Each  of the IP  executive  officers,  except  for  Mr.  Weekes  and Mr.
MacFarland,  has been employed by IP or another  subsidiary of Illinova for more
than five years in executive or management  positions.  Prior to election to the
positions  shown above,  the  following  executive  officers  held the following
positions since January 1, 1993.

     Mr. Altenbaumer was elected Senior Vice President,  Chief Financial Officer
and Treasurer in September  1995.  Prior to being elected  Senior Vice President
and Chief  Financial  Officer in June 1992, Mr.  Altenbaumer was Vice President,
Chief Financial Officer and Controller.

     Mr. Lang was elected  Senior Vice  President in June 1992.  He joined IP as
Vice President in July 1986.

        Mr.  MacFarland was contracted  from PECO Energy Company in Philadelphia
in January  1998.  He was elected  Senior Vice  President in February 1998 after

<PAGE>

being  named Chief  Nuclear  Officer in January  1998.  Prior to joining IP as a
contractor  from PECO, Mr.  MacFarland  held the positions of Vice President and
Director of Outage Management, both at PECO's Limerick Generating Station.

     Mr. Cook was elected Senior Vice President in December 1995. Prior to being
elected Vice President in 1992, Mr. Cook was Manager of Clinton Power Station.

     Mr. Eimer was elected Vice President in December  1995. He previously  held
the positions of Assistant to the Vice President and Manager of Marketing.

     Mr.  Leftwich was elected Vice  President in February  1998.  He previously
held the  positions of Managing  Director - Customer  Management  Processes  and
Manager of Marketing.

     Mr. Reynolds was elected Vice President in May 1996.  Prior to his election
to Vice  President,  Mr.  Reynolds  served as Director of Pricing and Manager of
Electric Supply.

     Mr. Schultz was elected Vice President in February 1998. He previously held
the positions of President of Illinova  Energy  Partners,  President of Illinova
Power Marketing and Treasurer of IP.

     Ms.  Stetzner was elected Vice  President,  General  Counsel and  Corporate
Secretary  in February  1993.  She joined IP as General  Counsel  and  Corporate
Secretary in October 1989.

     Ms. Steward was elected  Controller in September  1995. She previously held
the positions of Manager of Employee Services and Director of Accounting.

     Mr. Weekes joined IP as Treasurer in January 1997. He previously  served as
Director of Financial Analysis, Budgets and Controls with a unit of Kraft Foods.

        The  present  term of  office of each of the  above  executive  officers
extends to the first meeting of Illinova's and IP's Board of Directors after the
Annual Election of Directors. There are no family relationships among any of the
executive officers and directors of Illinova and IP.


                              Operating Statistics
                              ---------------------

        For Illinova the information under the caption "Selected  Illinois Power
Company  Statistics" on page a-33 of the 1997 Annual Report to  Shareholders  in
the  appendix  to  the  Illinova  Proxy  Statement  is  incorporated  herein  by
reference.

        For IP the information under the caption  "Selected  Statistics" on page
a-33 of the  1997  Annual  Report  to  Shareholders  in the  appendix  to the IP
Information Statement is incorporated herein by reference.

Item 2. Properties
- -------

        IP owns and operates six steam  generating  stations with  composite net
summer capacity of 4,419,000  kilowatts.  In addition,  IP owns nine quick start
combustion  turbine  peaking units at three locations with a combined net summer
capacity of 147,000 kilowatts.  All of IP's generating stations are in the State
of Illinois,  including IP's only nuclear generating  station,  Clinton. IP owns
50% of three combustion turbine units,  located in Bloomington,  Illinois,  with
combined net capacity of 5,250 kilowatts.  State Farm Insurance Company owns the
other 50% of these  units.  The total IP  available  net  summer  capability  is
4,571,250 kilowatts.

        The major coal-fired units at Baldwin, Havana,  Hennepin,  Vermilion and
Wood  River  make up  3,112,000  kilowatts  of summer  capacity.  Three  natural
gas-fired  units at Wood  River were  reactivated  in 1997.  These  units have a

<PAGE>

combined  net summer  capacity of 139,000  kilowatts.  Five  oil-fired  units at
Havana remain in cold standby status, not currently staffed for operation.

     In December 1996, the control and computer rooms for Wood River Units 4 and
5 were damaged by an in-plant fire.  Unit 4 was returned to service in June 1997
and Unit 5 was returned to service in October 1997.

     During  1995,  natural  gas firing  capability  was added to the  Vermilion
station.  Vermilion now has the capability for either coal or natural gas firing
to achieve its summer capacity of 176,000 kilowatts. In June 1997, the Vermilion
units returned to coal as its primary fuel.

     IP owns an  interconnected  electric  transmission  system of approximately
2,800 circuit  miles,  operating from 69,000 to 345,000 volts and a distribution
system which  includes  about 35,800  circuit miles of overhead and  underground
lines.

        All outstanding  first mortgage bonds issued under the Mortgage and Deed
of  Trust  dated  November  1,  1943 are  secured  by a first  mortgage  lien on
substantially  all of the  fixed  property,  franchises  and  rights  of IP with
certain  exceptions  expressly  provided in the mortgage securing the bonds. All
outstanding  New Mortgage  Bonds  issued under the General  Mortgage and Deed of
Trust dated November 1, 1992, are secured by a lien on IP's  properties  used in
the generation, purchase, transmission, distribution and sale of electricity and
gas. On October 24, 1997, a special  meeting of First Mortgage  Bondholders  was
held. At this meeting the Trustee,  holding more that the required two-thirds of
First Mortgage Bonds  outstanding,  voted in favor of a resolution  amending the
Mortgage  and Deed of Trust  dated  November  1,  1943,  to  conform  in certain
respects to the General  Mortgage and Deed of Trust dated  November 1, 1992.  On
December 10, 1997, the IP Board of Directors  approved the resolution adopted by
the Bondholders and forwarded a certified  resolution approving the Bondholders'
resolution of amendment to the Mortgage Trustee. This resolution was received by
the Mortgage  Trustee on December 11, 1997, at which time the  amendment  became
effective.

Item 3. Legal Proceedings
- -------

         See  discussion of legal  proceedings  in  "Manufactured-Gas  Plant" in
"Note 4 -  Commitments  and  Contingencies"  on pages  a-21 and a-22 of the 1997
Annual Report to  Shareholders  in the appendix to the Illinova Proxy  Statement
which is incorporated herein by reference.

        See  "Environmental  Matters"  reported  under Item 1 of this report for
information regarding legal proceedings concerning environmental matters.

        See "Fuel Supply"  reported under Item 1 of this report for  information
regarding legal proceedings concerning nuclear fuel disposal.

Item 4. Submission of Matters to a Vote of Security Holders
- -------

        On October 24, 1997, a special meeting of First Mortgage Bondholders was
held. At this meeting the Trustee,  holding more that the required two-thirds of
First Mortgage Bonds  outstanding,  voted in favor of a resolution  amending the
Mortgage  and Deed of Trust  dated  November  1,  1943,  to  conform  in certain
respects to the General Mortgage and Deed of Trust dated November 1, 1992.

<PAGE>


                                     PART II
- -------------------------------------------------------------------------------

Item 5.   Market for Registrants' Common Equity and Related
- -------   Stockholder Matters

        For Illinova the information under the caption  "Quarterly  Consolidated
Financial  Information  and Common Stock Data  (Unaudited)"  on page a-31 of the
1997  Annual  Report to  Shareholders  in the  appendix  to the  Illinova  Proxy
Statement is incorporated herein by reference.

        For  IP  the  information  under  the  caption  "Quarterly  Consolidated
Financial  Information  and Common Stock Data  (Unaudited)"  on page a-31 of the
1997  Annual  Report  to  Shareholders  in the  appendix  to the IP  Information
Statement is incorporated herein by reference.

Item 6. Selected Financial Data
- -------

        For Illinova the information  under the caption  "Selected  Consolidated
Financial  Data" on page a-32 of the 1997 Annual Report to  Shareholders  in the
appendix to the Illinova Proxy Statement is incorporated herein by reference.

        For  IP  the  information  under  the  caption  "Selected   Consolidated
Financial  Data" on page a-32 of the 1997 Annual Report to  Shareholders  in the
appendix to the IP Information Statement is incorporated herein by reference.

Item 7. Management's Discussion and Analysis of Financial
- -------   Condition and Results of Operations

        For Illinova the information under the caption "Management's  Discussion
and Analysis" on pages a-2 through a-9 of the 1997 Annual Report to Shareholders
in the  appendix to the  Illinova  Proxy  Statement  is  incorporated  herein by
reference.

        For IP the information  under the caption  "Management's  Discussion and
Analysis" on pages a-2 through a-9 of the 1997 Annual Report to  Shareholders in
the  appendix  to  the  IP  Information  Statement  is  incorporated  herein  by
reference.

        In March  1995,  the ICC  approved a program  whereby IP will  reacquire
shares  of its  common  stock  from  Illinova,  from  time to  time,  at  prices
determined to be equivalent to current market value.  The reacquired  stock will
be retained as treasury  stock or  canceled.  The ICC did not set a limit on the
number of shares of common  stock  that can be  repurchased,  subject to meeting
certain financial tests. Authorization for this program expires October 3, 1998.
The repurchase program may be extended subject to ICC approval.  During 1997, IP
repurchased 6,017,748 shares for a total of $121.5 million,  averaging about $20
per share.

        For  information  regarding the  redemption of IP preferred  stock,  see
"Note  10 -  Preferred  Stock  of  Subsidiary"  in the  "Notes  to  Consolidated
Financial  Statements" on page a-27 in the 1997 Annual Report to Shareholders in
the appendix to the Illinova  Proxy  Statement or "Note 9 - Preferred  Stock" in
the "Notes to Consolidated Financial Statements" on page a-27 in the 1997 Annual
Report to Shareholders in the appendix to the IP Information Statement.

        On February 26, 1998, IP issued a redemption  notice for all outstanding
bonds of its 6.00%  Pollution  Control  First  Mortgage  Bonds  due 2007  ($18.7
million) and its 8.30%  Pollution  Control First  Mortgage Bonds due 2017 ($33.8
million).  The effective call date for both series is April 1, 1998. On March 6,
1998, IP issued $18.7 million of 5.40%  Pollution  Control First  Mortgage Bonds
due 2028 and $33.8 million of 5.40%  Pollution  Control First Mortgage Bonds due
2028.


<PAGE>


Item 8. Financial Statements and Supplementary Data
- -------

         For Illinova the consolidated financial statements and related notes on
pages a-11 through a-31 and Report of  Independent  Accountants  on page a-10 of
the 1997 Annual  Report to  Shareholders  in the appendix to the Illinova  Proxy
Statement  are  incorporated  herein by  reference.  With the  exception  of the
aforementioned  information and the information incorporated in Items 1, 3, 5, 6
and 7, the 1997 Annual  Report to  Shareholders  in the appendix to the Illinova
Proxy  Statement  is not to be deemed  filed as part of this  Form  10-K  Annual
Report.

         For IP the consolidated financial statements and related notes on pages
a-11 through a-31 and Report of Independent Accountants on page a-10 of the 1997
Annual Report to  Shareholders  in the appendix to the IP Information  Statement
are incorporated  herein by reference.  With the exception of the aforementioned
information and the information incorporated in Items 1, 3, 5, 6 and 7, the 1997
Annual Report to Shareholders in the appendix to the IP Information Statement is
not to be deemed filed as part of this form 10-K Annual Report.

Item 9.   Changes in and Disagreements With Accountants on
- -------   Accounting and Financial Disclosure

None.

<PAGE>


                                    PART III
- -------------------------------------------------------------------------------

Item 10.   Directors and Executive Officers of the Registrants
- --------

        For Illinova the  information  under the caption "Board of Directors" on
pages 3 through 7 of Illinova's  Proxy  Statement for its 1998 Annual Meeting of
Stockholders is incorporated  herein by reference.  The information  relating to
Illinova's  executive  officers is set forth in Part I of this Annual  Report on
Form 10-K.

        For IP the information under the caption "Board of Directors" on pages 4
through  7 of  IP's  Information  Statement  for  its  1998  Annual  Meeting  of
Stockholders is incorporated  herein by reference.  The information  relating to
Illinois  Power  Company's  executive  officers  is set  forth in Part I of this
Annual Report on Form 10-K.

Item 11. Executive Compensation
- --------

         For Illinova the information under the caption "Executive Compensation"
on pages 8 through 12 of Illinova's  Proxy Statement for its 1998 Annual Meeting
of Stockholders is incorporated herein by reference.

         For IP the information  under the caption  "Executive  Compensation" on
pages 8 through 13 of IP's Information  Statement for its 1998 Annual Meeting of
Stockholders is incorporated herein by reference.

Item 12. Security Ownership of Certain Beneficial Owners and Management
- --------

         For Illinova the information under the caption  "Security  Ownership of
Management  and  Certain  Beneficial  Owners"  on  page  7 and  the  information
regarding  securities  owned by certain officers and directors under the caption
"Board of Directors" on pages 3 through 7 of Illinova's  Proxy Statement for its
1998 Annual Meeting of Stockholders is incorporated herein by reference.

         For IP  the  information  under  the  caption  "Security  Ownership  of
Management  and  Certain  Beneficial  Owners"  on  page  7 and  the  information
regarding  securities  owned by certain officers and directors under the caption
"Board of Directors" on pages 4 through 7 of IP's Information  Statement for its
1998 Annual Meeting of Stockholders is incorporated herein by reference.

Item 13. Certain Relationships and Related Transactions
- --------

         None.


<PAGE>


                                     PART IV
- ------------------------------------------------------------------------

Item 14.    Exhibits, Financial Statement Schedules, and Reports on
- --------    Form 8-K

     (a)    Documents filed as part of this report.
            (1a)   Financial Statements:
                                                             Page in 1997
                                                             Annual Report
                                                            to Shareholders
                                                            in the appendix
                                                            to the Illinova
                                                           Proxy Statement*
                                                           ----------------

               Report of Independent Accountants                     a-10
               Consolidated Statements of Income for the
                  three years ended December 31, 1997                a-11
               Consolidated Balance Sheets at
                  December 31, 1997 and 1996                         a-12
               Consolidated Statements of Cash Flows for
                  the three years ended December 31, 1997            a-13
               Consolidated Statements of Retained
                  Earnings for the three years
                  ended December 31, 1997                            a-13
                Notes to Consolidated Financial Statements    a-14 - a-31

     *    Incorporated  by reference from the indicated pages of the 1997 Annual
          Report  to   Shareholders  in  the  appendix  to  the  Illinova  Proxy
          Statement.

            (1b)   Financial Statements:
                                                             Page in 1997
                                                             Annual Report
                                                            to Shareholders
                                                            in the appendix
                                                               to the IP
                                                              Information
                                                               Statement**
                                                              ---------------

               Report of Independent Accountants                     a-10
               Consolidated Statements of Income for the
                 three years ended December 31, 1997                 a-11
               Consolidated Balance Sheets at
                 December 31, 1997 and 1996                          a-12
               Consolidated Statements of Cash Flows for 
                 the three years ended December 31, 1997             a-13
               Consolidated Statements of Retained
                 Earnings for the three years
                 ended December 31, 1997                             a-13
               Notes to Consolidated Financial Statements     a-14 - a-31

     **   Incorporated  by reference from the indicated pages of the 1997 Annual
          Report to Shareholders in the appendix to the IP Information Statement



<PAGE>



Item 14.        Exhibits, Financial Statement Schedules, and Reports on
- --------        Form 8-K (Continued)

                (2)    Financial Statement Schedules:

         All  Financial  Statement  Schedules  are omitted  because they are not
applicable or the required  information is shown in the financial  statements or
notes thereto.

                (3)    Exhibits

                The exhibits filed with this Form 10-K are listed in the Exhibit
                Index located  elsewhere  herein.  All management  contracts and
                compensatory  plans or  arrangements  set forth in such list are
                marked with a ~.

        (b) Reports on Form 8-K since September 30, 1997:

                  Report filed on Form 8-K on November 21, 1997
                        Other Events:  IP releases results of independent
                                       assessment of the Clinton Power Station.

                  Report filed on Form 8-K on January 8, 1998
                        Other Events:  IP selects PECO Nuclear to manage
                                       Clinton Power Station.  Impacts
                                       of Illinois  House Bill 362 and
                                       returning  Clinton to operation
                                       will result in a fourth quarter
                                       1997  charge  of  $260  million
                                       (net of income taxes).

                  Report filed on Form 8-K on January 21, 1998
                        Other Events:  The Nuclear Regulatory Commission
                                       places IP's Clinton Power Station on 
                                       its Watch List.

                  Report filed on Form 8-K on January 21, 1998
                        Other Events:  Illinova offers Medium-Term Notes under 
                                       its shelf Registration Statement on 
                                       Form S-3.

                           Financial 
                           Statements, 
                           Pro Forma 
                           Financial
                           Information 
                           and 
                           Exhibits:   Exhibits

                  Report filed on Form 8-K on February 13, 1998
                        Other Events:  Illinova releases 1997 earnings and 
                                       discloses  that it will  not  take  a
                                       previously announced  $40  million charge
                                       (net of  income  taxes) in 1997 for
                                       returning Clinton Power Station to
                                       operation.







                                   SIGNATURES

     Pursuant  to the  requirements  of  Section  13 or 15(d) 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 Larry D. Haab 
                                              Larry D. Haab, Chairman, President
                                                     and Chief Executive Officer

                                                           Date: March 11, 1998 

     Pursuant to the  requirements of the Securities  Exchange Act of 1934, this
report  has  been  signed  below  by the  following  persons  on  behalf  of the
registrant and in the capacities on the dates indicated.

 Signature                                 Title                          Date

   Larry D. Haab                        Chairman, President, Chief
   Larry D. Haab                        Executive Officer and Director
   (Principal Executive Officer)

   Larry F. Altenbaumer                 Senior Vice President and
   Larry F. Altenbaumer                 Chief Financial Officer
   (Principal Financial Officer)

   Cynthia G. Steward                   Controller
   Cynthia G. Steward
   (Principal Accounting Officer)

   J. Joe Adorjan                
   J. Joe Adorjan

   C. Steven McMillan            
   C. Steven McMillan

   Robert M. Powers              
   Robert M. Powers

   Sheli Z. Rosenberg            
   Sheli Z. Rosenberg                  Director                   March 11, 1998

   Walter D. Scott               
   Walter D. Scott

   Ronald L. Thompson            
   Ronald L. Thompson

   Walter M. Vannoy              
   Walter M. Vannoy

   Marilou von Ferstel           
   Marilou von Ferstel

   John D. Zeglis                
   John D. Zeglis

 
<PAGE>

                                   SIGNATURES

     Pursuant  to the  requirements  of  Section  13 or 15(d) 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       Larry D. Haab            
                                              Larry D. Haab, Chairman, President
                                              and Chief Executive Officer

                                              Date:      March 11, 1998         

     Pursuant to the  requirements of the Securities  Exchange Act of 1934, this
report  has  been  signed  below  by the  following  persons  on  behalf  of the
registrant and in the capacities on the dates indicated.

Signature                          Title                                 Date

Larry D. Haab                      Chairman, President, Chief
Larry D. Haab                      Executive Officer and Director
(Principal Executive Officer)

Larry F. Altenbaumer               Chief Financial Officer,
Larry F. Altenbaumer               Treasurer and Controller
(Principal Financial
and Accounting Officer)

J. Joe Adorjan
J. Joe Adorjan

C. Steven McMillan
C. Steven McMillan

Robert M. Powers
Robert M. Powers

Sheli Z. Rosenberg
Sheli Z. Rosenberg

Walter D. Scott
Walter D. Scott                     Director                      March 11, 1998

Joe J. Stewart
Joe J. Stewart

Ronald L. Thompson
Ronald L. Thompson

Walter M. Vannoy
Walter M. Vannoy

Marilou von Ferstel
Marilou von Ferstel

John D. Zeglis
John D. Zeglis






                                     Exhibit Index
Exhibit                               Description


(3)(i) Articles of Incorporation

Illinova Corporation

     (a)(1) Articles of Amendment to the Articles of  Incorporation  of Illinova
          Corporation,  filed as of October 31,  1994.  Filed as Exhibit 3(a) to
          the Quarterly Report on Form 10-Q under the Securities Exchange Act of
          1934 for the quarter ended September 30, 1994 (File No. 1-11327). *

     (a)(2) Statement of Correction to the Articles of Incorporation of Illinova
          Corporation,  filed as of October 31,  1994.  Filed as Exhibit 3(b) to
          the Quarterly Report on Form 10-Q under the Securities Exchange Act of
          1934 for the quarter ended September 30, 1994 (File No. 1-11327). *

Illinois Power Company

     (b)(1) Amended and Restated  Articles of  Incorporation  of Illinois  Power
          Company, dated September 7, 1994. Filed as Exhibit 3(a) to the Current
          Report on Form 8-K dated September 7, 1994 (File No. 1-3004). *

(3)(ii) By-Laws

     (a)  By-laws of Illinova  Corporation,  as amended December 14, 1994. Filed
          as  Exhibit  3(b)(2)  to the  Annual  Report  on Form  10-K  under the
          Securities  Exchange Act of 1934 for the year ended  December 31, 1994
          (File No. 1-11327). *

     (b)  By-laws of Illinois Power Company, as amended December 14, 1994. Filed
          as  Exhibit  3(b)(1)  to the  Annual  Report  on Form  10-K  under the
          Securities  Exchange Act of 1934 for the year ended  December 31, 1994
          (File No. 1-3004). *

(4) Instruments Defining Rights of Security Holders,
    Including Indentures

Illinova Corporation

     (a)(1) See (4)(b) below for  instruments  defining the rights of holders of
          long-term debt of Illinois Power Company.

     (a)(2) Indenture dated February 1, 1997,  between Illinova  Corporation and
          The First  National  Bank of  Chicago,  as  trustee.  Filed as Exhibit
          (4)(a)(2)  to the  Annual  Report  on Form 10-K  under the  Securities
          Exchange Act of 1934 for the year ended  December 31, 1996.  (File No.
          1-11327) *


<PAGE>


     (a)(3)  Distribution  Agreement  dated  January  16,  1998,  and  Officers'
          Certificate  and Issuer Order of Illinova  Corporation,  dated January
          16,  1998  (with  forms of Fixed  Rate  Note and  Floating  Rate  Note
          attached),  delivered  pursuant to the terms of the Indenture dated as
          of  February  1,  1997,  between  Illinova  Corporation  and The First
          National  Bank of  Chicago.  Filed as Exhibit  (1) and (4) of Form 8-K
          under the  Securities  Exchange  Act of 1934 dated  January 21,  1998.
          (File No. 1-11327) *

Illinois Power Company

     (b)(1) Mortgage and Deed of Trust dated November 1, 1943.  Filed as Exhibit
          2(b) Registration No. 2-14066. *

     (b)(2) Supplemental  Indenture  dated May 1, 1974.  Filed as Exhibit  2(v)
          Registration No. 2-51674. *

     (b)(3)  Supplemental  Indenture  dated May 1, 1977.  Filed as Exhibit  2(w)
          Registration No. 2-59465. *

     (b)(4) Supplemental Indenture dated July 1, 1979. Filed as Exhibit 2 to the
          Quarterly  Report on Form 10-Q under the  Securities  Exchange  Act of
          1934 for the quarter ended June 30, 1979. *

     (b)(5) Supplemental Indenture dated March 1, 1985. Filed as exhibit 4(a) to
          the Quarterly Report on Form 10-Q under the Securities Exchange Act of
          1934 for the quarter ended March 31, 1985 (File No. 1-3004). *

     (b)(6) Supplemental Indenture dated July 1, 1987, providing for $33,755,000
          principal  amount of 8.30% First  Mortgage  Bonds,  Pollution  Control
          Series I, due April 1,  2017.  Filed as  Exhibit  4(ll) to the  Annual
          Report on Form 10-K under the Securities  Exchange Act of 1934 for the
          year ended December 31, 1987 (File No. 1-3004). *

     (b)(7)  Supplemental  Indenture  dated  December  13, 1989,  providing  for
          $300,000,000 principal amount of Medium-Term Notes, Series A. Filed as
          Exhibit 4(nn) to the Annual  Report on Form 10-K under the  Securities
          Exchange  Act of 1934 for the year ended  December  31, 1989 (File No.
          1-3004). *

     (b)(8) Supplemental Indenture dated July 1, 1991, providing for $84,710,000
          principal  amount of 7 3/8%  First  Mortgage  Bonds due July 1,  2021.
          Filed as  Exhibit  4(mm) to the  Annual  Report on Form 10-K under the
          Securities  Exchange Act of 1934 for the year ended  December 31, 1991
          (File No. 1-3004). *

     (b)(9)  Supplemental  Indenture No. 1 dated June 1, 1992.  Filed as Exhibit
          4(nn) to the Quarterly  Report on Form 10-Q for the quarter ended June
          30, 1992 (File No. 1-3004). *


<PAGE>



     (b)(10) Supplemental  Indenture No. 2 dated June 1, 1992.  Filed as Exhibit
          4(oo) to the Quarterly  Report on Form 10-Q for the quarter ended June
          30, 1992 (File No. 1-3004). *

     (b)(11) Supplemental  Indenture No. 1 dated July 1, 1992.  Filed as Exhibit
          4(pp) to the Quarterly  Report on Form 10-Q for the quarter ended June
          30, 1992 (File No. 1-3004). *

     (b)(12) Supplemental  Indenture No. 2 dated July 1, 1992.  Filed as Exhibit
          4(qq) to the Quarterly  Report on Form 10-Q for the quarter ended June
          30, 1992 (File No. 1-3004). *

     (b)(13)  Supplemental  Indenture  dated  September 1, 1992,  providing  for
          $72,000,000  principal  amount  of 6 1/2%  First  Mortgage  Bonds  due
          September 1, 1999.  Filed as Exhibit 4(rr) to the Quarterly  Report on
          Form 10-Q for the quarter ended  September 30, 1992 (File No. 1-3004).
          *

     (b)(14) General  Mortgage  Indenture and Deed of Trust dated as of November
          1,  1992.  Filed as Exhibit  4(cc) to the  Annual  Report on Form 10-K
          under the Securities  Exchange Act of 1934 for the year ended December
          31, 1992 (File No. 1-3004). *

     (b)(15) Supplemental  Indenture  dated  February 15, 1993, to Mortgage and
          Deed of Trust dated  November 1, 1943.  Filed as Exhibit  4(dd) to the
          Annual Report on Form 10-K under the  Securities  Exchange Act of 1934
          for the year ended December 31, 1992 (File No. 1-3004). *

     (b)(16) Supplemental Indenture dated February 15, 1993, to General Mortgage
          Indenture  and Deed of Trust dated as of  November  1, 1992.  Filed as
          Exhibit 4(ee) to the Annual  Report on Form 10-K under the  Securities
          Exchange  Act of 1934 for the year ended  December  31, 1992 (File No.
          1-3004). *

     (b)(17) Supplemental  Indenture No. 1 dated March 15, 1993, to Mortgage and
          Deed of Trust dated  November 1, 1943.  Filed as Exhibit  4(ff) to the
          Annual Report on Form 10-K under the  Securities  Exchange Act of 1934
          for the year ended December 31, 1992 (File No. 1-3004). *

     (b)(18)  Supplemental  Indenture  No. 1 dated  March 15,  1993,  to General
          Mortgage  Indenture  and Deed of Trust  dated as of  November 1, 1992.
          Filed as  Exhibit  4(gg) to the  Annual  Report on Form 10-K under the
          Securities  Exchange Act of 1934 for the year ended  December 31, 1992
          (File No. 1-3004). *

     (b)(19) Supplemental  Indenture No. 2 dated March 15, 1993, to Mortgage and
          Deed of Trust dated  November 1, 1943.  Filed as Exhibit  4(hh) to the
          Annual Report on Form 10-K under the  Securities  Exchange Act of 1934
          for the year ended December 31, 1992 (File No. 1-3004). *

     (b)(20)  Supplemental  Indenture  No. 2 dated  March 15,  1993,  to General
          Mortgage  Indenture  and Deed of Trust  dated as of  November 1, 1992.
          Filed as  Exhibit  4(ii) to the  Annual  Report on Form 10-K under the
          Securities  Exchange Act of 1934 for the year ended  December 31, 1992
          (File No. 1-3004). *

     (b)(21) Supplemental Indenture dated July 15, 1993, to Mortgage and Deed of
          Trust dated November 1, 1943.  Filed as Exhibit 4(jj) to the Quarterly
          Report on Form 10-Q for the  quarter  ended  June 30,  1993  (File No.
          1-3004). *

     (b)(22)  Supplemental  Indenture  dated July 15, 1993, to General  Mortgage
          Indenture  and Deed of Trust dated as of  November  1, 1992.  Filed as
          Exhibit  4(kk)to  the  Quarterly  Report on Form 10-Q for the  quarter
          ended June 30, 1993 (File No. 1-3004). *

     (b)(23)  Supplemental  Indenture dated August 1, 1993, to Mortgage and Deed
          of  Trust  dated  November  1,  1943.  Filed as  Exhibit  4(ll) to the
          Quarterly  Report on Form 10-Q for the  quarter  ended  June 30,  1993
          (File No. 1-3004). *

     (b)(24) Supplemental  Indenture  dated August 1, 1993, to General  Mortgage
          Indenture  and Deed of Trust dated as of  November  1, 1992.  Filed as
          Exhibit  4(mm) to the  Quarterly  Report on Form 10-Q for the  quarter
          ended June 30, 1993 (File No. 1-3004). *

     (b)(25) Supplemental Indenture dated October 15, 1993, to Mortgage and Deed
          of  Trust  dated  November  1,  1943.  Filed as  Exhibit  4(nn) to the
          Quarterly Report on Form 10-Q for the quarter ended September 30, 1993
          (File No. 1-3004). *

     (b)(26) Supplemental  Indenture dated October 15, 1993, to General Mortgage
          Indenture  and Deed of Trust dated as of  November  1, 1992.  Filed as
          Exhibit  4(oo) to the  Quarterly  Report on Form 10-Q for the  quarter
          ended September 30, 1993 (File No. 1-3004). *

     (b)(27) Supplemental Indenture dated November 1, 1993, to Mortgage and Deed
          of  Trust  dated  November  1,  1943.  Filed as  Exhibit  4(pp) to the
          Quarterly Report on Form 10-Q for the quarter ended September 30, 1993
          (File No. 1-3004). *

     (b)(28) Supplemental  Indenture dated November 1, 1993, to General Mortgage
          Indenture  and Deed of Trust dated as of  November  1, 1992.  Filed as
          Exhibit  4(qq) to the  Quarterly  Report on Form 10-Q for the  quarter
          ended September 30, 1993 (File No. 1-3004). *

     (b)(29) Supplemental Indenture dated February 1, 1994, to Mortgage and Deed
          of Trust dated November 1, 1943.  Filed as Exhibit 4(hh) to the Annual
          Report on Form 10-K under the Securities  Exchange Act of 1934 for the
          year ended December 31, 1993 (File No. 1-3004). *
<PAGE>

     (b)(30) Indenture dated October 1, 1994 between  Illinois Power Company and
          the First  National  Bank of  Chicago.  Filed as  Exhibit  4(a) to the
          Quarterly Report on Form 10-Q for the quarter ended September 30, 1994
          (File No. 1-3004). *

     (b)(31)Supplemental  Indenture dated October 1, 1994, to Indenture dated as
          of October 1, 1994.  Filed as Exhibit 4(b) to the Quarterly  Report on
          Form 10-Q for the quarter ended September 30, 1994 (File No.1-3004). *

     (b)(32) Indenture dated January 1, 1996 between  Illinois Power Company and
          Wilmington  Trust  Company.  Filed as Exhibit  4(b)(36)  to the Annual
          Report on Form 10-K under the Securities  Exchange Act of 1934 for the
          year ended December 31, 1995 (File No. 1-3004). *

     (b)(33)  First  Supplemental  Indenture  dated  January  1,  1996,  between
          Illinois Power Company and Wilmington Trust Company.  Filed as Exhibit
          4(b)(37)  to the  Annual  Report  on Form 10-K  under  the  Securities
          Exchange  Act of 1934 for the year ended  December  31, 1995 (File No.
          1-3004). *

     (b)  (34) Supplemental  Indenture dated April 1, 1997, to Mortgage and Deed
          of Trust dated November 1, 1943 Filed as Exhibit 4(a) to the Quarterly
          Report on Form 10-Q for the quarter  ended March 31,  1997.  (File No.
          1-3004) *

     (b)  (35)  Supplemental  Indenture dated April 1, 1997 to General  Mortgage
          Indenture and Deed of Trust dated  November 1, 1992.  Filed as Exhibit
          4(b) to the Quarterly  Report on Form 10-Q for the quarter ended March
          31, 1997. (File No. 1-3004) *

     (b)  (36)  Supplemental  Indenture  dated  December 1, 1997 to Mortgage and
          Deed of Trust dated November 1, 1943.

(10) Material Contracts

Illinova Corporation

     (a)(1)  Illinova  Corporation   Deferred   Compensation  Plan  for  Certain
          Directors,  as amended  April 10, 1991.  Filed as Exhibit 10(b) to the
          Annual Report on Form 10-K under the  Securities  Exchange Act of 1934
          for the year ended December 31, 1991 (File No. 1-3004).~ *

     (a)(2) Illinova  Corporation  Director Emeritus Plan for Outside Directors.
          Filed as  Exhibit  10(e) to the  Annual  Report on Form 10-K under the
          Securities  Exchange Act of 1934 for the year ended  December 31, 1989
          (File No. 1-3004).~ *


<PAGE>



     (a)(3) Illinova Corporation Stock Plan for Outside Directors as amended and
          restated  by the Board of  Directors  on April 9, 1992 and as  further
          amended April 14, 1993. Filed as Exhibit 10(h) to the Annual Report on
          Form 10-K under the Securities Exchange Act of 1934 for the year ended
          December 31, 1993 (File No. 1-3004).~ *

     (a)(4) Illinova  Corporation  Retirement  Plan for  Outside  Directors,  as
          amended  through  December  11,  1991.  Filed as Exhibit  10(j) to the
          Annual Report on Form 10-K under the  Securities  Exchange Act of 1934
          for the year ended December 31, 1991 (File No. 1-3004).~ *

     (a)(5) Illinova  Corporation 1992 Long-Term  Incentive  Compensation  Plan.
          Filed as Exhibit  10(k) to the  Quarterly  Report on Form 10-Q for the
          quarter ended March 31, 1992 (File No. 1-3004).~ *

     (a)(6) Illinova Corporation  Comprehensive  Deferred Stock Plan for Outside
          Directors,  as approved by the Board of Directors on February 7, 1996.
          Filed as Exhibit 10 (a)(6) to the Annual Report on Form 10-K under the
          Securities  Exchange Act of 1934 for the year ended  December 31, 1995
          (File No. 1-11327).~ *

     (a)(7) Form of  Employee  Retention  Agreement  in place  between  Illinova
          Corporation and its elected officers, Illinois Power Company's elected
          officers, and the Presidents of Illinova  Corporation's  subsidiaries.
          Filed as  Exhibit  10(g) to the  Annual  Report on Form 10-K under the
          Securities  Exchange Act of 1934 for the year ended  December 31, 1989
          (File no. 1-3004).~ *

     (a)(8) Illinova Corporation Leadership Incentive Program, effective January
          1, 1996.~

     (a)(9) Illinova  Corporation  Retirement  Plan for  Outside  Directors,  as
          amended by  resolutions  adopted by the Board of Directors on February
          7, 1996.~

     (a)(10) Illinova Corporation  Employee Retention  Agreement,  as amended by
          resolutions adopted by the Board of Directors on February 7, 1996.~

     (a)(11)  Illinova  Corporation  Deferred   Compensation  Plan  for  Certain
          Directors as amended October 9, 1996, effective January 1, 1997.~

     (a)(12) Illinova Corporation  Employee Retention  Agreement,  as amended by
          resolutions adopted by the Board of Directors on June 10-11, 1997.~

     (a)(13)  Illinova  Corporation  Deferred   Compensation  Plan  for  Certain
          Directors, as amended by resolutions adopted by the Board of Directors
          on June 10-11, 1997.~



<PAGE>



Illinois Power Company

     (b)(1) Group Insurance Benefits for Managerial  Employees of Illinois Power
          Company as amended  January  1,  1983.  Filed as Exhibit  10(a) to the
          Annual Report on Form 10-K under the  Securities  Exchange Act of 1934
          for the year ended December 31, 1983 (File No. 1-3004).~ *

     (b)(2) Illinois  Power Company  Incentive  Savings Trust and Illinois Power
          Company  Incentive  Savings  Plan and  Amendment  I thereto.  Filed as
          Exhibit 10(d) to the Annual  Report on Form 10-K under the  Securities
          Exchange  Act of 1934 for the year ended  December  31, 1984 (File No.
          1-3004).~ *

     (b)(3) Illinois Power  Company's  Executive  Incentive  Compensation  Plan.
          Filed as  Exhibit  10(f) to the  Annual  Report on Form 10-K under the
          Securities  Exchange Act of 1934 for the year ended  December 31, 1989
          (File No. 1-3004).~ *

     (b)(4) Illinois  Power  Company  Incentive  Savings  Plan,  as amended  and
          restated  effective  January  1, 1991.  Filed as Exhibit  10(h) to the
          Annual Report on Form 10-K under the  Securities  Exchange Act of 1934
          for the year ended December 31, 1990 (File No. 1-3004).~ *

     (b)(5) Illinois Power Company Executive  Deferred  Compensation Plan. Filed
          as  Exhibit  10(l)  to the  Annual  Report  on  Form  10-K  under  the
          Securities  Exchange Act of 1934 for the year ended December 31, 1993.
          (File No. 1-3004)~ *

     (b)(6) Illinois Power Company Retirement Income Plan for salaried employees
          as amended and restated  effective January 1, 1989, as further amended
          through  January 1, 1994.  Filed as Exhibit 10(m) to the Annual Report
          on Form 10-K under the  Securities  Exchange  Act of 1934 for the year
          ended December 31, 1994 (File No. 1-3004).~ *

     (b)(7) Illinois Power Company  Retirement Income Plan for employees covered
          under a  collective  bargaining  agreement  as  amended  and  restated
          effective as of January 1, 1994.  Filed as Exhibit  10(n)to the Annual
          Report on Form 10-K under the Securities  Exchange Act of 1934 for the
          year ended December 31, 1994 (File No. 1-3004).~ *

     (b)(8)  Illinois  Power  Company  Incentive  Savings  Plan as  amended  and
          restated  effective  January  1, 1991 and as further  amended  through
          amendments  adopted  December 28, 1994.  Filed as Exhibit  10(o)to the
          Annual Report on Form 10-K under the  Securities  Exchange Act of 1934
          for the year ended December 31, 1994 (File No. 1-3004).~ *


<PAGE>


     (b)(10) Illinois Power Company Incentive Savings Plan for employees covered
          under a  collective  bargaining  agreement  as  amended  and  restated
          effective  January 1, 1991 and as further amended  through  amendments
          adopted December 28, 1994. Filed as Exhibit 10(p) to the Annual Report
          on Form 10-K under the  Securities  Exchange  Act of 1934 for the year
          ended December 31, 1994 (File No. 1-3004).~ *

     (b)(11) Illinois Power Company Executive  Incentive  Compensation  Plan, as
          amended, effective January 1, 1997. ~

     (b)(12) Illinois  Power Company  Executive  Deferred  Compensation  Plan as
          amended  by  resolutions  adopted  by the Board of  Directors  on June
          10-11, 1997.~

     (b)(13) Illinois  Power  Company  Supplemental  Retirement  Income Plan for
          Salaried Employees of Illinois Power Company as amended by resolutions
          adopted by the Board of Directors on June 10-11, 1997.~

     (b)(14) Retirement  and  Consulting  Agreement  entered into as of June 30,
          1997 between Illinois Power Company and Wilfred Connell.~

(12) Statement Re Computation of Ratios

     (a)  Computation  of  ratio  of  earnings  to fixed  charges  for  Illinova
          Corporation.

     (b)  Computation  of ratio of earnings to fixed charges for Illinois  Power
          Company.

(13) Annual Reports to Shareholders

     (a)  Illinova  Corporation  Proxy  Statement  and  1997  Annual  Report  to
          Shareholders.

     (b)  Illinois Power Company Information Statement and 1997 Annual Report to
          Shareholders.

(21) Subsidiaries of Registrants

     (a)  Subsidiaries of Illinova Corporation and Illinois Power Company.

(23) Consents of Experts

     Consent of Independent Accountants for Illinova Corporation.

(27) Financial Data Schedules

     (a)  Illinova Corporation

     (b)  Illinois Power Company


*       Incorporated herein by reference.

~        Management contract and compensatory plans or arrangements.



                                                                 Exhibit (b)(36)
 
 
                                                                [Conformed Copy]












 




                             ILLINOIS POWER COMPANY

                                       TO

                         HARRIS TRUST AND SAVINGS BANK,

                                   as Trustee


                                                                     



                             Supplemental Indenture

                          DATED AS OF DECEMBER 1, 1997


                                       TO


                           Mortgage and Deed of Trust

                             DATED NOVEMBER 1, 1943


<PAGE>


                                                        


SUPPLEMENTAL INDENTURE, dated as of the first day of December,  Nineteen hundred
and  ninety-seven  (1997) (the  "Supplemental  Indenture"),  made by and between
ILLINOIS POWER COMPANY,  a corporation  organized and existing under the laws of
the State of Illinois  (the  "Company"),  and HARRIS  TRUST AND SAVINGS  BANK, a
corporation  organized and existing under the laws of the State of Illinois (the
"Trustee"),  as Trustee  under the Mortgage and Deed of Trust dated  November 1,
1943.

     WHEREAS, the Company has heretofore executed and delivered its Mortgage and
Deed of Trust dated November 1, 1943 (the "Original Indenture"), to the Trustee,
for the  security of the First  Mortgage  Bonds of the Company  issued and to be
issued thereunder (the "Bonds"); and

     WHEREAS,  the Company  desires to amend the  Original  Indenture in certain
respects,   and  in  connection  therewith  has  complied  with  the  applicable
provisions of Articles XIV and XV of the Original Indenture; and

     WHEREAS, the Company, in the exercise of the powers and authority conferred
upon and  reserved to it under the  provisions  of the Original  Indenture,  and
pursuant to appropriate resolutions of the Board of Directors, has duly resolved
and  determined  to make,  execute  and  deliver to the  Trustee a  Supplemental
Indenture in the form hereof for the purposes herein provided; and

     WHEREAS,  all the  conditions  and  requirements  necessary  to  make  this
Supplemental  Indenture a valid,  binding and legal  instrument  have been done,
performed and  fulfilled and the execution and delivery  hereof have been in all
respects duly authorized:

     NOW, THEREFORE, THIS INDENTURE WITNESSETH:

     THAT Illinois Power Company, in consideration of the purchase and ownership
from  time  to  time  of the  Bonds  and the  service  by the  Trustee,  and its
successors,  under the Original  Indenture  and of One Dollar to it duly paid by
the  Trustee at or before the  ensealing  and  delivery of these  presents,  the
receipt whereof is hereby acknowledged,  hereby covenants and agrees to and with
the Trustee and its  successors in the trust under the Original  Indenture,  for
the benefit of those who shall hold the Bonds and coupons, if any,  appertaining
thereto, as follows:
<PAGE>

                                   ARTICLE I

                         AMENDMENT OF ORIGINAL INDENTURE


Section 1. The  Original  Indenture  is hereby  amended to delete the terms "St.
Clair bonds" and "St. Clair mortgage" and all references thereto.

Section 2. Article I of the Original Indenture, "Definitions," is hereby amended
in the following respects:

     (a)  The  definition  of "Net  bondable  value of  property  additions  not
          subject to an unfunded  prior lien" is hereby  amended by changing the
          fractions  set forth in each of  Subdivisions  (e)(1) and (f)  thereof
          from "ten-sixths (10/6ths)" to "133 1/3%."

     (b)  The definition of "Net bondable value of property additions subject to
          an unfunded  prior lien" is hereby  amended by changing the  fractions
          set forth in each of Subdivisions (c) and (d) thereof from "ten-sixths
          (10/6ths)" to "133 1/3%."

     (c)  The definition of "Net earnings of the Company  available for interest
          and property retirement appropriations" is hereby amended and restated
          in its entirety as follows:

               "The term net earnings of the Company  available for interest and
          property retirement  appropriations shall mean the net earnings of the
          Company ascertained as follows, specifying:

               (a) its  operating  revenues  (which may include  revenues of the
          Company  subject  when  collected  or accrued to possible  refund at a
          future date) with the principal divisions thereof.

               (b) its operating expenses, with the principal divisions thereof,
          excluding  (A) expenses for income,  profits and other taxes  measured
          by, or  dependent  on, net income,  (B)  provisions  for  reserves for
          renewals,  replacements,  depreciation,  depletion  or  retirement  of
          property  (or  any   expenditures   therefor),   or   provisions   for
          amortization  of property,  (C) expenses or provisions for interest on
          any  indebtedness  of  the  Company,  for  the  amortization  of  debt
          discount,  premium,  expense  or  loss  on  reacquired  debt,  for any
          maintenance  and  replacement,  improvement  or sinking  fund or other
          device  for  the  retirement  of  any   indebtedness,   or  for  other
          amortization,  (D) expenses or provisions for any non-recurring charge
          to  income  or  to  retained  earnings  of  whatever  kind  or  nature
          (including  without  limitation the  recognition of expense due to the
          non-recoverability of assets or expense), whether or not recorded as a
          non-recurring  charge  in the  Company's  books  of  account,  and (E)
          provisions for any refund of revenues previously  collected or accrued
          by the Company subject to possible refund;
<PAGE>

               (c) the amount remaining after deducting the amount in clause (b)
          above from the amount in clause (a) above;

               (d) its rental  revenues (net of rental  expenses not included in
          clause (b) above);

               (e) the sum of the amounts in clauses (c) and (d);

               (f) its other income, which amount may include any portion of the
          allowance for funds used during  construction and other income related
          to deferred costs (or any analogous  amounts) which is not included in
          "other  income"  (or any  analogous  item) in the  Company's  books of
          account;

               (g) Net  earnings  of the  Company  available  for  interest  and
          property retirement  appropriations  (being the sum of clauses (e) and
          (f) above).

               Notwithstanding anything herein to the contrary,  neither profits
          nor  loss  from  the  sale  or  other  disposition  of  property,  nor
          non-recurring charges of any kind or nature,  whether items of revenue
          or  expense,  shall be  included in  calculating  net  earnings of the
          Company available for interest and property retirement appropriations.

               If any of the property of the Company  owned by it at the time of
          calculating  net  earnings of the Company  available  for interest and
          property retirement appropriations (a) shall have been acquired during
          or after any period for which net  earnings of the  Company  available
          for  interest  and  property  retirement   appropriations  are  to  be
          computed, (b) shall not have been acquired in exchange or substitution
          for property  the net earnings of which have been  included in the net
          earnings of the Company available for interest and property retirement
          appropriations, and (c) had been operated as a separate unit and items
          of revenue and expense attributable thereto are readily ascertainable,
          then the net earnings of such property (computed in the manner in this
          Section  provided  for  the  computation  of the net  earnings  of the
          Company available for interest and property retirement appropriations)
          during such period or such part of such period as shall have  preceded
          the  acquisition  thereof,  to the  extent  that  the  same  have  not
          otherwise  been included in the net earnings of the Company  available
          for  interest  and  property  retirement  appropriations,  shall be so
          included."

     (d)  The definition of "Net earnings of the Company  available for interest
          after property  retirement  appropriations" and all references thereto
          are hereby deleted in their entirety.
<PAGE>

Section 3. Article III of the Original  Indenture,  "Authentication and Delivery
of Bonds," is hereby amended in the following respects:

     (a)  Section 3,  Subdivision  (b)(1) is hereby  amended by (i) changing the
          period "fifteen  calendar months" to "eighteen  calendar months," (ii)
          deleting  the phrase "the greater of" and changing the figure "two and
          one-half"  to "two," and (iii)  deleting  the  phrase "or ten  percent
          (10%) of the principal amount of".

     (b)  Section 3,  Subdivision  (b)(2) and all references  thereto are hereby
          deleted in their entirety.

     (c)  The first  paragraph  of Section 4 is hereby  amended by changing  the
          percentage set forth in the first sentence thereof from 60% to 75%.

     (d)  Section 4,  Subdivisions  (a)(7)(i)  and (a)(8) are hereby  amended by
          changing the fraction set forth in each such Subdivision  thereof from
          "ten-sixths (10/6ths)" to "133 1/3%."

Section 4. Article IV of the Original  Indenture,  "Particular  Covenants of the
Company," is hereby amended in the following respects:

     (a)  Section  6,  Subdivision  (a) is hereby  amended by (i)  deleting  the
          phrase  "such  hazards and risks as are usually  insured by  companies
          similarly  situated and operating  like  properties"  and replacing in
          lieu thereof the word "fire," (ii) deleting the phrase "Fifty thousand
          dollars"  and  replacing  in lieu thereof "the greater of Five Million
          Dollars ($5,000,000) or three per cent (3%) of the aggregate principal
          amount of the Bonds then outstanding  under this Indenture,  and (iii)
          deleting the phrase "hazards and risks covered thereby" in Subdivision
          (a)(1) and replacing in lieu thereof the word "fire."

     (b)  Section 6,  Subdivision  (b) is hereby  amended by deleting the phrase
          "Twenty  five  thousand  dollars"  and  replacing in lieu thereof "the
          greater  of  Five  Million  Dollars  or  three  per  cent  (3%) of the
          aggregate  principal  amount  of Bonds  then  outstanding  under  this
          Indenture."

     (c)  Section 6,  Subdivision  (c) is hereby  amended by deleting the phrase
          "any  insurance"  and  replacing in lieu  thereof "any fire  insurance
          required to be  maintained by it pursuant to  Subdivision  (a) of this
          Section."

     (d)  Section  14,  Subdivision  (a)  is  hereby  amended  by  changing  the
          percentage set forth therein from "50%" to "75%."
<PAGE>

     (e)  Section 14,  Subdivision  (b)(1) is hereby amended by (i) changing the
          period "fifteen  calendar months" to "eighteen  calendar months," (ii)
          deleting  the phrase "the greater of" and changing the figure "two and
          one-half"  to "two," and (iii)  deleting  the  phrase "or ten  percent
          (10%) of the principal amount of."

     (f)  Section 14,  Subdivision  (b)(2) and all references thereto are hereby
          deleted in their entirety.

     (g)  Section  16,  Subdivisions  (a)(1) and  (a)(2)  are hereby  amended by
          changing the percentages set forth in each such Subdivision from "60%"
          to "75%."

     (h)  Section 16,  Subdivision  (b)(1) is hereby amended by (a) changing the
          period "fifteen  calendar months" to "eighteen  calendar  months," (b)
          deleting  the phrase "the greater of" and changing the figure "two and
          one-half" to "two," and (c) deleting the phrase "or ten percent  (10%)
          of the principal amount of, and."

     (i)  Section 16,  Subdivision  (b)(2) and all references thereto are hereby
          deleted in their entirety.

     (j)  Sections 24, 25 and 26 and all  references  thereto are hereby deleted
          in their entirety.

Section 5. Article VI of the Original Indenture,  "Concerning Securities Held by
the Trustee," is hereby amended to delete Sections 6, 7, 8, 9, 10, 11 and 12 and
all references thereto in their entirety.

Section 6. Article VII of the Original Indenture,  "Possession,  Use and Release
of Property," is hereby amended in the following respects:

     (a)  Section 3 is amended by adding the  following  paragraph at the end of
          Section 3:\

          "Notwithstanding  any of the foregoing,  if the property  constituting
          part of the trust  estate to be released  is (i) capital  stock of any
          Subsidiary owned by the Company,  or (ii) secured funded  indebtedness
          of any  Subsidiary  owned by the  Company,  the  Company  shall not be
          required to comply with any of the provisions of this Section 3."

     (b)  Article VII is hereby amended by adding the following new Section 9:

          "SECTION 9.  Notwithstanding the other provisions of this Article VII,
          unless an Event of Default shall have occurred and be continuing,  the
          Company may obtain the release  from the lien of this  Indenture,  any
          part of the property  constituting  part of the trust  estate,  or any
          part  thereof,  and  the  Trustee  shall  whenever  from  time to time
          requested by the Company, and without requiring compliance with any of
          the other  provisions  of this Article VII,  release the same from the
          lien hereof all the right, title and interest of the Trustee in and to
          the same, provided either that:
<PAGE>

               (a) the aggregate fair value of the property to be so released on
          any date in a given  calendar  year,  together with all other property
          released pursuant to this Subdivision (a) in such calendar year, shall
          not exceed the greater of Five  Million  Dollars  ($5,000,000)  or one
          percent  (1%) of the  aggregate  principal  amount of the Bonds at the
          time  outstanding,  provided  that  there  shall be  delivered  to the
          Trustee an  engineer's  certificate  stating  the fair  value,  in the
          judgment of the signers, of the property to be released, the aggregate
          fair value of all other property theretofore released pursuant to this
          Subdivision (a) in such calendar year and that, in the judgment of the
          signers,  the release  thereof will not impair the security under this
          Indenture in contravention of the provisions hereof; or

               (b) the aggregate fair value of the property to be so released on
          any date in a given  calendar  year,  together with all other property
          released  pursuant  to  Subdivision  (a) of  this  Section  9 or  this
          Subdivision  (b) in such  calendar  year,  shall exceed the greater of
          Five Million Dollars ($5,000,000) or one percent (1%) of the aggregate
          principal amount of the Bonds at the time  outstanding,  but shall not
          exceed three  percent (3%) of the  aggregate  principal  amount of the
          Bonds at the time outstanding,  provided that there shall be delivered
          to the Trustee an engineer's  certificate  stating the fair value,  in
          the  judgment of the  signers,  of the  property to be  released,  the
          aggregate  fair  value  of all  other  property  theretofore  released
          pursuant to Subdivision (a) of this Section 9 and this Subdivision (b)
          in such calendar year and, as to property additions,  the cost thereof
          (or, if the fair value to the Company of such property at the time the
          same became  property  additions was less than the cost thereof,  then
          such fair value, in the judgment of the signers, in lieu of cost), and
          that,  in the  judgment of the signers,  the release  thereof will not
          impair the  security  under this  Indenture  in  contravention  of the
          provisions hereof. On or before December 1st of each year, the Company
          shall  deposit  with  the  Trustee  an  amount  in cash  equal  to the
          aggregate cost of the properties  constituting  property  additions so
          released pursuant to this Subdivision (b) during the previous calendar
          year (or, if the fair value to the Company of any particular  property
          at the time the same became property  additions was less than the cost
          thereof,  then such fair  value in lieu of cost);  provided,  however,
          that no such  deposit  shall be required to be made  hereunder  to the
          extent that cash or other  consideration  shall,  as  indicated  in an
          Officer's  certificate  delivered to the Trustee,  have been deposited
          with the trustee or other  holder of a funded  prior lien,  a unfunded
          prior  lien or  other  lien  prior to the  lien of this  Indenture  in
          accordance  with the provision  thereof.  Any cash  deposited with the
          Trustee under this  Subdivision (b) may thereafter be withdrawn,  used
          or applied in the  manner,  to the  extent and for the  purposes,  and
          subject to the conditions, provided in this Article VII."
<PAGE>

Section  7.  Article  VIII of the  Original  Indenture,  "Application  of Moneys
Received by the Trustee," is hereby amended in the following respects:

     (a)  The first paragraph of Section 1 is hereby amended and restated in its
          entirety as follows:

          "Section 1. Any moneys held by the Trustee as part of the trust estate
          (other than moneys received by the Trustee pursuant to Section 5(a) of
          Article  III or on  account  of  judgment  liens or in order to make a
          prior lien a funded  prior  lien) shall be paid over from time to time
          by the Trustee to or upon the order of the  Treasurer  or an Assistant
          Treasurer  of the Company,  in amount  equal to the cost,  or the fair
          value to the  Company if the fair value is less than the cost,  of all
          property additions purchased, constructed or otherwise acquired by the
          Company not previously included within the definition of "net bondable
          value of property additions not subject to an unfunded prior lien" for
          purposes  of  issuing  Bonds or  withdrawing  cash,  but only upon the
          receipt by the Trustee of :"


     (b)  Section  1,  Subdivision  (b)(1) is hereby  amended  by  deleting  the
          following in its entirety:

          "during the period specified in such certificate, commencing,

               (i) in the case of withdrawal  of moneys  received by the Trustee
          pursuant  to Sections 3, 4 or 5 of Article VII upon the release of any
          property (other than obligations deposited pursuant to Section 3(d) of
          Article  VII) from the lien of this  Indenture,  on a date not earlier
          than the date of the application for such release,

               (ii) in the case of withdrawal of moneys  received by the Trustee
          upon the payment of principal  of  obligations  deposited  pursuant to
          Section 3(d) of Article  VII, or upon the release of such  obligations
          from the lien of this  Indenture,  on a date not earlier than the date
          of the  application  for the release of the  property  with respect to
          which such obligations were deposited,

               (iii) in the case of  withdrawal  of  moneys  deposited  with the
          Trustee  pursuant  to Section 6 of Article IV, on the date of the loss
          or  destruction of the property with respect to which such moneys were
          deposited, and
<PAGE>

               (iv) in the case of  withdrawal  of any other moneys which may be
          withdrawn  pursuant to this  Section 1, on a date not earlier than the
          date of the receipt by the Trustee of such moneys."

     (c)  Section  3,   Subdivision  (a)  is  hereby  amended  by  changing  the
          percentage set forth therein from "60%" to "75%."

     (d)  Section 8 and all  references  thereto  are  hereby  deleted  in their
          entirety.

Section 8. Article IX of the Original  Indenture,  "Remedies  Upon  Default," is
hereby amended by deleting  Section 1,  Subdivisions (a) through (k) thereof and
substituting therefor the following:

               "(a)  failure  to  pay  interest,  if  any,  on any  Bond  within
          forty-five (45) days after the same becomes due and payable; or

               (b) failure to pay the  principal  of or premium,  if any, on any
          Bond within three (3) business days after its maturity; or

               (c) failure to make any payment to any  sinking,  maintenance  or
          other analogous fund within sixty (60) days after the same becomes due
          and payable;

               (d)  failure to perform or breach of any  covenant or warranty of
          the  Company in this  Indenture  (other  than a covenant or warranty a
          default in the performance of which or breach of which is elsewhere in
          this Section  specifically dealt with) for a period of sixty (60) days
          after there has been given,  by registered  or certified  mail, to the
          Company  by the  Trustee,  or to the  Company  and the  Trustee by the
          Bondholders of at least twenty-five  percent (25%) in principal amount
          of the Bonds then outstanding  under this Indenture,  a written notice
          specifying  such default or breach and requiring it to be remedied and
          stating  that such notice is a "notice of default"  hereunder,  unless
          the Trustee,  or the Trustee and the Bondholders of a principal amount
          of Bonds not less than the principal  amount of Bonds the  Bondholders
          of which gave such notice,  as the case may be, shall agree in writing
          to an  extension  of such period  prior to its  expiration;  provided,
          however, that that Trustee, or the Trustee and the Bondholders of such
          principal amount of Bonds, as the case may be, shall be deemed to have
          agreed  to an  extension  of  such  period  if  corrective  action  is
          initiated  by the Company  within such period and is being  diligently
          pursued; or

               (e) the entry by a court having  jurisdiction  in the premises of
          (i) a decree  or order for  relief in  respect  of the  Company  in an
          involuntary case or proceeding  under any applicable  Federal or State
          bankruptcy, insolvency,  reorganization or other similar law or (ii) a
          decree or order  adjudging  the  Company a bankrupt or  insolvent,  or
         
<PAGE>

          approving as properly  filed a petition by one or more  Persons  other
          than the Company seeking  reorganization,  arrangement,  adjustment or
          composition  of or in  respect  of the  Company  under any  applicable
          Federal or State law, or appointing a custodian, receiver, liquidator,
          assignee,  trustee,  sequestrator  or other  similar  official  of the
          Company  or of any  substantial  part  of for the  Company  or for any
          substantial  part of its  property,  or  ordering  the  winding  up or
          liquidation of its affairs, and any such decree or order for relief or
          any such other  decree or order shall have  remained  unstayed  and in
          effect for a period of ninety (90) consecutive days; or
 
               (f)  the  commencement  by the  Company  of a  voluntary  case or
          proceeding   under  any  applicable   Federal  or  State   bankruptcy,
          insolvency,  reorganization  or other similar law or of any other case
          or  proceeding  to be  adjudicated  a bankrupt  or  insolvent,  or the
          consent  by it to the entry of a decree or order for relief in respect
          of the Company in a case or proceeding under any applicable Federal or
          State bankruptcy,  insolvency,  reorganization or other similar law or
          to the commencement of any bankruptcy or insolvency case or proceeding
          against  it, or the  filing by it of a  petition  or answer or consent
          seeking reorganization or relief under any applicable Federal or State
          law,  or the  consent by it to the filing of such  petition  or to the
          appointment  of  or  taking  possession  by  a  custodian,   receiver,
          liquidator, assignee, trustee, sequestrator or similar official of the
          Company or of any substantial  part of its property,  or the making by
          it of an assignment for the benefit of creditors,  or the admission by
          it in  writing of its  inability  to pay its debts  generally  as they
          become  due,  or the  authorization  of such  action  by the  Board of
          Directors; or

               (g) an "Event of Default"  under the General  Mortgage  Indenture
          and Deed of Trust, dated as of November 1, 1992 (the "1992 Mortgage"),
          from the  Company to Harris  Trust and  Savings  Bank,  trustee,  or a
          Matured Event of Default  under any Prior  Mortgage (as such terms are
          defined in the 1992 Mortgage);  provided,  however,  that, anything in
          this Indenture to the contrary notwithstanding,  the waiver of cure of
          such "Event of Default"  or event of default  and the  rescission  and
          annulment of the consequences thereof shall constitute a waiver of the
          corresponding  completed default under this Indenture and a rescission
          and annulment of the consequences thereof;"

Section 9. Article XII of the  Original  Indenture,  "Consolidation,  Merger and
Sale," is hereby amended in the following respects:

     (a)  Section  1,  Subdivision  (b)(1) is hereby  amended  by  changing  the
          percentage set forth therein from "50%" to "75%."

     (b)  Section 1,  Subdivision  (b)(2) is hereby  amended by (a) changing the
          period "fifteen  calendar months" to "eighteen  calendar  months," (b)
          deleting  the phrase "the greater of" and changing the figure "two and
          one-half" to "two," and (c) deleting the phrase "or ten percent  (10%)
          

<PAGE>

          of the  principal  amount  of,  and the  net  earnings  of such  other
          corporation   available  for  interest   after   property   retirement
          appropriations  (determined  in the manner  provided in Article I) for
          the same twelve month period shall have  amounted in the  aggregate to
          at least two times the amount of the annual interest charges on".


                                   ARTICLE II

                                   THE TRUSTEE

     The Trustee  hereby  accepts the trusts  hereby  declared  and provided and
agrees  to  perform  the same  upon the terms  and  conditions  in the  Original
Indenture set forth and upon the following terms and conditions:

          The Trustee shall not be responsible  in any manner  whatsoever for or
     in respect of the validity or sufficiency of this Supplemental Indenture or
     the  due  execution  hereof  by the  Company  or for or in  respect  of the
     recitals  contained  herein,  all of which recitals are made by the Company
     solely. In general,  each and every term and condition contained in Article
     XIII of the Original  Indenture shall apply to this Supplemental  Indenture
     with the same  force and  effect as if the same  were  herein  set forth in
     full, with such omissions,  variations and modifications  thereof as may be
     appropriate to make the same conform to this Supplemental Indenture.

                                   ARTICLE III

                                  MISCELLANEOUS

          This  Supplemental  Indenture  may be  simultaneously  executed in any
     number of  counterparts,  each of which when so executed shall be deemed to
     be an original; but such counterparts shall together constitute but one and
     the same instrument.
<PAGE>

     IN WITNESS  WHEREOF,  said Illinois Power Company has caused this Indenture
to be executed on its behalf by its Chairman and President, one of its Executive
Vice Presidents, one of its Senior Vice Presidents or one of its Vice Presidents
and its corporate  seal to be hereto affixed and said seal and this Indenture to
be attested  by its  Secretary  or one of its  Assistant  Secretaries;  and said
Harris Trust and Savings Bank, in evidence of its acceptance of the trust hereby
created, has caused this Indenture to be executed on its behalf by its President
or one of its Vice  Presidents  and its corporate  seal to be hereto affixed and
said seal and this  Indenture  to be  attested  by its  Secretary  or one of its
Assistant Secretaries; all as of the first day of December, nineteen hundred and
ninety-seven.

                                                     ILLINOIS POWER COMPANY,


                                                     By /s/ Larry F. Altenbaumer
(CORPORATE SEAL)               Senior Vice President and Chief Financial Officer



ATTEST:


 /s/ Leah Manning Stetzner                  
                  Secretary


                                         HARRIS TRUST AND SAVINGS BANK, Trustee,


                                         By /s/ J. Bartolini                    
(CORPORATE  SEAL)                                    Vice President



 /s/ C. Potter                                                
                  Assistant Secretary
<PAGE>


STATE OF ILLINOIS )
                                    ) SS.
COUNTY OF MACON   )

     BE IT REMEMBERED,  that on this 19th day of December,  1997, before me, the
undersigned  Teresa Stewart, a Notary Public within and for the County and State
aforesaid, personally came Larry F. Altenbaumer, Senior Vice President and Chief
Financial  Officer,  and Leah Manning  Stetzner,  Secretary,  of Illinois  Power
Company, a corporation duly organized,  incorporated and existing under the laws
of the State of Illinois,  who are  personally  known to me to be such officers,
and who are  personally  known to me to be the same persons who executed as such
officers the within  instrument of writing,  and such persons duly  acknowledged
that they signed,  sealed and  delivered  the said  instrument as their free and
voluntary  act as such  Senior  Vice  President,  Chief  Financial  Officer  and
Secretary,  respectively,  and as free and voluntary act of said Illinois  Power
Company for the uses and purposes therein set forth.

     IN WITNESS  WHEREOF,  I have  hereunto  subscribed  my name and  affixed my
official seal on the day and year last above written.


                                           /s/ Teresa Stewart                   
                                           Notary Public, Macon County, Illinois

My Commission Expires September 17, 2001.

(NOTARIAL SEAL)

<PAGE>

STATE OF ILLINOIS )
                                    ) SS.
COUNTY OF COOK    )

     BE IT REMEMBERED,  that on this 17th day of December,  1997, before me, the
undersigned  Marianne  Tinerella,  a Notary Public within and for the County and
State aforesaid,  personally came J. Bartolini,  Vice President,  and C. Potter,
Assistant  Secretary,  of Harris  Trust and Savings  Bank,  a  corporation  duly
organized,  incorporated  and existing  under the laws of the State of Illinois,
who are personally known to me to be such officers, and who are personally known
to me to be the same persons who executed as such officers the within instrument
of writing,  and such persons  duly  acknowledged  that they signed,  sealed and
delivered  the said  instrument  as their  free and  voluntary  act as such Vice
President and Assistant Secretary,  respectively,  and as free and voluntary act
of said Harris  Trust and  Savings  Bank for the uses and  purposes  therein set
forth.

     IN WITNESS  WHEREOF,  I have  hereunto  subscribed  my name and  affixed my
official seal on the day and year last above written.


                                            /s/ Marianne Tinerella              
                                            Notary Public, Cook County, Illinois

My Commission Expires May 21, 2001.

(NOTARIAL SEAL)


CHI2:149570.5  03.06.98  10.41





                                                                 Exhibit (a)(8)

                              ILLINOVA CORPORATION
                          LEADERSHIP INCENTIVE PROGRAM

                        (Effective as of January 1, 1996)


Effective Date

The  Illinova   Corporation   Leadership  Incentive  Program  (the  "Plan")  was
established by Illinova  Corporation (the "Company")  effective as of January 1,
1996 (the "Effective Date").

Objectives

The objectives of the Plan are:

     o    To link  incentives  with  performance in order to encourage  improved
          Company performance.

     o    To focus attention on value enhancement for shareholders.

     o    To foster and  encourage  teamwork  at the  Illinova  Leadership  Team
          level.

     o    To motivate and reward performance above a planned or expected level.

     o    To attract and retain strong management personnel.

     o    To develop a more competitive compensation package relative to market.

Eligibility

The Chief Executive Officer of the Company (the "CEO"), in his discretion, shall
designate those management  employees of the Company who will participate in the
Plan  ("Participants")  for each Plan  Year,  which is the  calendar  year.  The
Participants  for each Plan Year will normally be designated by the CEO prior to
the beginning of the year.  If an  individual is designated as a Participant  in
the middle of a Plan Year, the  Participant's  award may be pro-rated based upon
the number of completed  months of service  between the date of eligibility  and
the end of the Plan Year.

Awards

For each Plan Year,  Participants will receive incentive payments for corporate,
business group and departmental  performance  that exceeds normal  expectations.
Determination of whether performance exceeds normal expectations for a Plan Year
shall be made on the basis of measurement of internal achievement levels against
the goals established under the Plan for the year.

Participants  will have the  opportunity to earn up to 14% of salary in any Plan
Year for achievement of corporate goals established for that year. Two levels of
Company  performance will be identified for each goal -- a threshold level and a
maximum level.  Attainment of any goal at the threshold  level for any Plan Year
will  qualify  for an award for that year with  respect  to that goal equal to a
percentage of the  Participant's  salary for the year times the weighting factor
(described below) for that goal.  Attainment of any goal at or above the maximum
level qualifies for the maximum award of 14% of the Participant's salary for the
year times the  weighting  factor for that goal.  Attainment  at a level between
threshold and maximum will result in a pro-rated award.

In addition,  Participants  will have the opportunity to earn up to 6% of salary
in any Plan Year for  achievement of business group and  departmental  goals for
that year ("variable  goals").  A Participant's  "Total Award" for any Plan Year
will equal the sum of the awards with respect to each corporate goal  (including
the award with respect to the discretionary category, if any) for the year, plus
the sum of the  awards  with  respect to the  Participant's  variable  goals.  A
Participant's  Total  Award  for any  Plan  Year  shall  not  exceed  20% of the
Participant's salary for the year.

Awards  under the Plan  shall not be  considered  part of a  Participant's  base
salary.  It is intended  that,  in  determining  whether such base  salaries for
Participants are at a competitive level relative to base salaries in the utility
industry, awards under the Plan shall be disregarded.

Goals

No later than the first meeting of the Company's Board of Directors in each Plan
Year,  the Chief  Executive  Officer of the Company (the "CEO") shall  establish
specific goals for corporate performance for that Plan Year. The corporate goals
(except for the  discretionary  performance  goal, if any) shall be the same for
all  Participants  with  respect to any Plan Year.  Goals  shall  focus on major
challenges  and issues  facing the  Company.  The goals shall  include  specific
performance  criteria that are determined to be vital to the  achievement of the
Company's long term strategic objectives.  A "weighting factor" will be assigned
to each of the goals that  recognizes  the relative  importance and influence of
the goal to the overall success of the Company.

Except as  otherwise  provided in the Plan,  the  corporate  goals for each Plan
Year,  and the manner of measuring  performance  against  those  goals,  will be
developed in conjunction  with the annual  planning and budgeting  activities of
the Company for the year.

In  addition to  establishing  specific  performance  categories  and  assigning
weighting factors to those  categories,  the [CEO] may establish a discretionary
performance  category for any Plan Year and assign a weighting factor to it. The
performance factors with respect to any such discretionary category for any Plan
Year shall be established by the Participant's business group leader at any time
before,  during  or after the end of the year.  The  level of  achievement  with
respect to the  discretionary  category for any Plan Year, and the award payable
with respect to that  category,  shall be  determined by comparing the Company's
performance  for the year with factors  that the  Participant's  business  group
leader determines to be appropriate measures of such performance.

The total of the  weighting  factors with respect to the  corporate  performance
goals for each Plan Year will equal  100%.  No awards  will be earned  under the
Plan with respect to the  corporate  performance  goals for any Plan Year unless
the Company has declared a dividend for that Plan Year.

Variable  goals  with  respect  to any  Plan  Year  will be  established  by the
Participant's business group leader prior to the beginning of the Plan Year.

Payment of Award

A  Participant's  Total  Award  for any  Plan  Year  shall  be made in two  cash
payments, known as the Short-Term Payment and the Long-Term Payment.

Subject to the following  provisions of the Plan, the Short-Term  Payment earned
for any Plan Year shall be made to the  Participant  in the first quarter of the
following year. A Participant's  Short-Term  Payment shall equal one-half of the
Participant's Total Award for the year.

Subject to the following  provisions of the Plan, the Long-Term  Payment for any
Plan Year shall be made to the  Participant  in the first  quarter of the fourth
year  following  the Plan  Year for which the  award is  earned.  The  Long-Term
Payment  earned for a Plan Year shall equal one-half of the Total Award for that
Plan Year,  increased  or decreased to the same extent that the value of a share
of Company common stock has increased or decreased for the Holding Period (based
on the  closing  prices of the  stock on the  first and last day of the  Holding
Period, and adjusted by the CEO to reflect stock splits and other  extraordinary
events) and further  increased to reflect  Dividend  Equivalents for the Holding
Period.  The "Holding Period" for a Long-Term Payment is the period beginning on
last  trading day of the Plan Year for which the payment was earned,  and ending
on the first trading day of the fourth year thereafter.

The "Dividend  Equivalents"  for a Long-Term  Payment for the Holding Period are
the  dividends  that would be paid  during the  Holding  Period on the number of
shares of common stock of the Company  that could be  purchased  with 50% of the
Total Award,  determined by dividing 50% of the Total Award by the closing price
of the stock on the first day of the Holding Period,  and adjusted by the CEO to
reflect subsequent stock splits and other extraordinary  events. For purposes of
determining  the  Dividend  Equivalents,  it is assumed that the  dividends  are
reinvested in a manner that is comparable to the manner of reinvesting dividends
set forth in Illinova  Corporation  Automatic  Reinvestment  and Stock  Purchase
Plan;  provided that dividends paid in the last six months of the Holding Period
shall  not  be  deemed  to  be  reinvested;  and  further  provided  that  if  a
Participant's employment with the Company and its affiliates terminates prior to
the end of the Holding  Period,  the amount payable to the  Participant  will be
adjusted so that dividends for the six-month  period prior to the termination of
employment are not deemed to be reinvested.

If a Participant  for any Plan Year ceases to be employed by the Company and its
affiliates  during the year for reasons of  retirement  after  attaining age 55,
disability  (as  determined  by the  CEO)  or  death,  the  Participant  (or the
Participant's  beneficiary)  shall be  entitled to the amount of the Total Award
for the year,  pro-rated  based on the number of months between the beginning of
the Plan Year and the date of  retirement,  disability or death.  The payment of
such amount shall be made in the first quarter of the year following the year in
which occurs the termination of employment because of retirement,  disability or
death.

If a Participant  for any Plan Year ceases to be employed by the Company and its
affiliates  during that year for reasons other than  retirement  after attaining
age 55,  disability (as determined by the CEO) or death,  the Participant  shall
forfeit the Total Award for the year.

If a Participant  for any Plan Year ceases to be employed by the Company and its
affiliates  after the end of such Plan Year for any  reason,  the  Participant's
Short-Term Payment shall be unaffected by the termination of employment.

If a Participant  for any Plan Year ceases to be employed by the Company and its
affiliates  after the end of that Plan Year, and prior to the end of the Holding
Period,  for  reasons of  retirement  after  attaining  age 55,  disability  (as
determined  by  the  CEO)  or  death,  the  Participant  (or  the  Participant's
beneficiary)  shall be entitled to the Long-Term  Payment,  determined as though
the  Holding  Period  ended  on the  last  business  day  of  the  Participant's
employment.  The  payment of such  amount  shall be made as soon as  practicable
after termination of employment.

If a Participant  for any Plan Year ceases to be employed by the Company and its
affiliates  after the end of such Plan Year, and prior to the end of the Holding
Period, for reasons other than retirement after attaining age 55, disability (as
determined  by the CEO) or death,  the  Participant  shall forfeit the Long-Term
Payment for the year.

Administration

The Plan shall be administered by the CEO;  provided that, the Employee Services
department shall have  responsibility  for the day-to-day  administration of the
Plan.

Amendment and Termination

The Plan may be amended or  terminated  by the Board of Directors of the Company
at any time,  except that no such amendment or  termination  adopted in any Plan
Year shall adversely  affect the awards of any Participant for that Plan Year or
any prior Plan Year.


                                                                  Exhibit (a)(9)


                              ILLINOVA CORPORATION
                               BOARD OF DIRECTORS

                                   RESOLUTIONS


         WHEREAS, the continuation of the Retirement Plan for Outside Directors,
except for those  beneficiaries  for whom the rights have already vested through
retirement, is viewed as no longer desirable.

         THEREFORE,  BE IT  RESOLVED,  that the Plan be  terminated  as to those
directors not yet retired,  and that benefits under the Plan continue to be paid
to those otherwise qualified directors who have retired on or before the date of
this resolution; and

         RESOLVED,  that the proper  officers of the Company are  authorized and
directed  to  adopt  a  new  compensation   plan  for  outside   directors,   in
substantially the form presented to the meeting, in which such directors receive
an  annual  award of stock  units  having a value of  $6,000,  to be paid to the
beneficiary  in cash on  retirement  in a lump sum or in  installments,  as such
director may elect,  together with  dividend  equivalents  attributable  to such
stock units; and

         RESOLVED,  that the proper  officers of the Company are  authorized and
directed to make a cash payment to each current  outside  director  equal to the
present value of the payments such director would have  received,  had he or she
retired under the Plan,  based on each such  director's  actual years of service
but not to exceed ten years of service; and

         RESOLVED,  that the proper  officers of the Company are  authorized  to
take all such  further  action as may be  necessary  or  desirable to effect the
purpose and intent of the foregoing resolutions.



                                                                 Exhibit (a)(10)
 

                             ILLINOIS POWER COMPANY
                               BOARD OF DIRECTORS

                                   RESOLUTIONS

     WHEREAS,  the Company and its Board of Directors  believe it is in the best
interests of the Company to make  certain  modifications  to the Illinois  Power
Company  Employee  Retention Plan (the "Plan") and  Agreements,  to preserve the
original  purpose of the Plan and the  Agreements,  which is to  facilitate  the
retention of the services of motivated officers and employees of the Company and
to clarify certain administrative issues;

     RESOLVED,  that pursuant to the amending authority reserved to the Board of
Directors of the Company,  the Plan and the Employee  Retention  Agreements  are
hereby amended, effective February 7, 1996, in the following respects:

     1.   Employees  in Salary Band 4 who have not entered in separate  Employee
          Retention   Agreements   with  the  Company   shall  be  eligible  for
          participation in the Plan.

     2.   The  definition of "Good Reason" set forth in Section  3(a)(ii) of the
          Plan is hereby expanded to include a reduction in any material element
          of an eligible employee's compensation.

     3.   The  definition of "Change in Control" set forth in Section  3(a)(iii)
          of the Plan and as set forth in the  Agreements is hereby  modified to
          clarify  that the  acquisition  of stock by a trustee of any  employee
          benefit plan maintained by the Company will not be treated as a Change
          in  Control,  and to  clarify  that in no event will a merger or other
          transaction   result  in  a  Change  in  Control   if  the   Company's
          shareholders own at least 80 percent of the surviving entity.
         
     4.   Eligible  employees who are terminated prior to a Change in Control at
          the request of a potential  acquiror  will be  eligible  for Plan,  or
          Agreement, benefits.
         
     5.   The  provision  in Section 2 of the Plan and in the  Agreements  which
          authorizes the Board to determine,  after the fact, that a transaction
          is not a Change in Control is hereby eliminated.

     6.   The  Company,  and its  successors  and  assigns,  waive any  contract
          formation  or other  defenses it may  otherwise  be entitled to assert
          with respect to the Plan.

     RESOLVED, that the proper officers of the Company are hereby authorized and
directed  to do any and all acts and things and to execute  and  deliver any and
all documents or  instruments,  including but not limited to the preparation and
execution of an amended Plan document and of amended  Agreements,  as they shall
deem  necessary  or  appropriate  to carry of the  intent  and  purposes  of the
foregoing resolution.


                                                                 Exhibit (a)(11)



                                    AMENDMENT
                                       OF
                              ILLINOVA CORPORATION
                DEFERRED COMPENSATION PLAN FOR CERTAIN DIRECTORS


         WHEREAS,  Illinova  Corporation (the "Company")  maintains the Illinova
Corporation Deferred Compensation Plan for Certain Directors (the "Plan"); and

         WHEREAS,  the Company has  determined  that it would be  beneficial  to
contract with Fidelity Institutional Retirement Service Company for provision of
certain record keeping and administrative  services in connection with the Plan,
beginning on or about January 1, 1997,  and,  because of Fidelity  Institutional
Retirement  Service Company's highly automated systems,  Fidelity  Institutional
Retirement Service Company can promptly convert deferred funds into common stock
(or  equivalent  stock  units) so that Plan  participants  may be credited  with
common  stock  ownership  immediately  rather  than on a  quarterly  basis as is
currently provided in the Plan.

         NOW,  THEREFORE,  BE IT  RESOLVED  that the Plan is hereby  amended  by
adding a new subsection (d) to Section 3, worded as follows:

         "(d) Notwithstanding the foregoing, if administrators of this Plan have
         the capability to convert funds in the Deferred  Money Accounts  sooner
         or more frequently than on a quarterly basis,  conversions will be made
         as quickly as they may feasibly be accomplished."






                                                                 Exhibit (a)(12)

                                    AMENDMENT
                                       TO
              EMPLOYEE RETENTION AGREEMENT OF ILLINOVA CORPORATION

     WHEREAS,  Illinova  Corporation  (Corporation)  has entered  into  Employee
Retention Agreements with certain of its employees (the "Agreements"); and

     WHEREAS, amendment of the Agreements is now deemed desirable;

     NOW,  THEREFORE,  BE IT RESOLVED that,  pursuant to the amending  authority
reserved  to the  Corporation  in  paragraph 8 of each of the  Agreements,  each
Agreement  is hereby  amended by adding  the  following  sentence  at the end of
paragraph 1 thereof:

"Notwithstanding  any provision in this Agreement to the contrary,  the benefits
under this paragraph 1 shall be in lieu of, and not in addition to, any benefits
to which the  Eligible  Employee  might  otherwise  be entitled  under any other
severance plan maintained by the Company."







                                                                 Exhibit (a)(13)

                                    AMENDMENT
                                       OF
                              ILLINOVA CORPORATION
                DEFERRED COMPENSATION PLAN FOR CERTAIN DIRECTORS

     WHEREAS,  Illinova  Corporation  (the  "Company")  maintains  the  Illinova
Corporation  Company  Deferred  Compensation  Plan for  Certain  Directors  (the
"Plan"); and

     WHEREAS, amendment of the Plan is now deemed desirable;

     NOW,  THEREFORE,  BE IT RESOLVED that,  pursuant to the amending  authority
reserved to the Corporation in Section 6 of the Plan, the Plan is hereby amended
by substituting the following for Section 4 of the Plan:

     "4. Distribution.

     (a) As of a Participant's Date of Termination, the number of stock units in
his Stock Unit  Account  shall be converted  to a dollar  value,  which shall be
determined  by  multiplying  the number of stock units in such Account as of his
Date of  Termination  by the  closing  market  composite  price per share of the
Company's Common Stock as reported on the New York Stock Exchange Composite Tape
as of the last day of the month  immediately  preceding such Date of Termination
or, if such shares are not traded on that date,  on the next  preceding  date on
which shares were traded.  Such dollar value,  in addition to the balance in the
Participant's  Deferred Money  Account,  if any, is the  Participant's  "Account
Value".  For purposes of this Section 4, a  Participant's  `Date of Termination'
means the last day on which the  Participant  ceases to serve as a member of the
Company's Board of Directors.

     (b) Payment of a  Participant's  Account Value shall be made solely in cash
and shall be made, or commence to be made, as soon as practicable  following the
Participant's Date of Termination, as follows:

     (i) in a lump sum payment; or

     (ii) in ten or fewer annual  installments,  as elected by the  Participant;
          provided,  however,  any such  election that has not been on file with
          the  Committee at least 12 months prior to the  Participant's  Date of
          Termination  shall  be  disregarded  and  payments  shall  be  made in
          accordance with the  Participant's  most recent election form that has
          been on file  with the  Committee  at least 12  months,  or if no such
          election has been filed, in accordance with paragraph (i) next above.

     (c) In the event of a Participant's death before he has received payment of
his full Account Value,  the remaining unpaid Account Value shall be paid to his
designated  beneficiary or beneficiaries as soon as practicable  thereafter in a
lump  sum.  If  no  designated  beneficiary  has  been  named  or  survives  the
Participant, the beneficiary will be the Participant's estate."


                                                                 Exhibit (b)(11)

                                  AMENDMENT OF
                             ILLINOIS POWER COMPANY
                      EXECUTIVE INCENTIVE COMPENSATION PLAN

     (As Amended and Restated Effective as of January 1, 1992)

     WHEREAS,  Illinois  Power  Company (the  "Company")  maintains the Illinois
Power Company Executive Incentive
Compensation Plan (the "Plan"); and

     WHEREAS, amendment of the Plan is now deemed desirable;

     NOW,  THEREFORE,  IT IS  RESOLVED  that,  by virtue and in  exercise of the
amending  authority  reserved to the Company under the Plan,  the Plan is hereby
amended,  effective  January 1, 1997,  by  substituting  the  following  for the
"Eligibility" section of the Plan:

     "Eligibility

     The Board of  Directors of the Company (the  'Board'),  in its  discretion,
     shall designate those elected  officers of the Company who will participate
     in the Plan for each Plan Year,  which is the calendar  year.  The Board of
     Directors of each Subsidiary (as defined below),  in its discretion,  shall
     designate  those officers of such  Subsidiary  who will  participate in the
     Plan for each Plan Year. The  Participants for each Plan Year normally will
     be designated by the applicable  Board of Directors  prior to the beginning
     of the year;  provided,  however,  for the Plan Year  beginning  January 1,
     1997,  Participants  who are employed by a Subsidiary  may be designated by
     the Board of  Directors  of such  Subsidiary  no later than  [February  28,
     1997].  If an individual is designated as a Participant  in the middle of a
     Plan Year, the Participant's  award will be pro-rated based upon the number
     of completed  months of service between the date of eligibility and the end
     of the Plan Year. For purposes of the Plan,  'Subsidiary' means any company
     during any period in which it is a 'subsidiary corporation' as that term is
     defined in section 424(f) of the Internal  Revenue Code with respect to the
     Company."





                                                                 Exhibit (b)(12)


                                    AMENDMENT
                                       OF
                             ILLINOIS POWER COMPANY
                      EXECUTIVE DEFERRED COMPENSATION PLAN

     WHEREAS,  Illinois  Power  Company (the  "Company")  maintains the Illinois
Power Company Executive Deferred Compensation Plan (the "Plan"); and

     WHEREAS, amendment of the Plan is now deemed desirable;

     NOW,  THEREFORE,  BE IT RESOLVED that,  pursuant to the amending  authority
reserved to the Corporation in Section 8 of the Plan, the Plan is hereby amended
in the following particulars:

     1.   By substituting the following for subsection 3.5 of the Plan:

     "3.5 Employee  Selection of Investment Return Rate. Subject to the terms of
the Plan, a Participant may elect the Investment  Return Rate(s) that will apply
to all of his  Accounts  from time to time by filing an election  in  accordance
with such rules as the Plan  Administrator may establish  regarding the form and
timing  of  such  elections,  including  to the  extent  provided  by  the  Plan
Administrator  rules  relating  to daily  Investment  Return  Rate  changes  and
telephonic  filing of elections.  To the extent permitted by the Committee,  the
Participant  may  elect  to have  different  Investment  Return  Rates  apply to
different portions of his Account balances."

     2. By substituting the phrase "Employee Services Department" for the phrase
"Employee  Relations  Department"  where the latter phrase  appears in paragraph
7.2(b) of the Plan.





                                                                 Exhibit (b)(13)


                                    AMENDMENT
                                       OF
                       SUPPLEMENTAL RETIREMENT INCOME PLAN
                FOR SALARIED EMPLOYEES OF ILLINOIS POWER COMPANY

     WHEREAS,  Illinois Power Company (the "Company") maintains the Supplemental
Retirement  Income Plan for Salaried  Employees of Illinois  Power  Company (the
"Plan"); and

     WHEREAS, amendment of the Plan is now deemed desirable;

     NOW,  THEREFORE,  BE IT RESOLVED that,  pursuant to the amending  authority
reserved  to the  Corporation  in  Section  6.1 of the Plan,  the Plan is hereby
amended by substituting the following for Section 1.5 of the Plan:

     "1.5 `Participant'  means an elected officer of the Company and any officer
of a Subsidiary  designated  as a Participant  by the Company's  Chairman of the
Board of Directors who is a participant  under the Qualified Plan and to whom or
with respect to whom a benefit is payable under the Plan. `Subsidiary' means (i)
any company  during any period in which it is a member of a controlled  group of
corporations  (as  defined in  Section  414(b) of the Code)  that  includes  the
Company;  (ii) any trade or business (whether or not incorporated) that is under
common control (as defined in Section 414(c) of the Code) with the Company;  and
(iii) any corporation or other entity that is a member of an affiliated  service
group (as defined in Section 414(m) of the Code) that includes the Company."


                                                                 Exhibit (b)(14)

                                                                   June 30, 1997





Mr. Wilfred Connell
2899 Forrest Lane
Decatur, IL  62521

Dear Wilfred:

This letter  represents  the full and complete  terms of the  agreement  between
Wilfred Connell and Illinois Power (Company)  regarding your retirement from the
Company.

1.   You will remain an active employee of the Company,  at your present monthly
     rate of  $16,000,  through  July 31,  1997.  During  this  period  you will
     continue  to  report  to  John  Cook  and  will  be  assigned  projects  as
     appropriate.

2.   You agree to make yourself available to perform consulting services for the
     Company  during the period August 1, 1997 through  December 31, 1997 as may
     be requested  by the Company  from time to time.  The Company will give you
     advance notice when  consulting  services are required and agrees that such
     consulting services will not require more than 60 hours of your time in any
     month  and will not  exceed  300 hours in total.  In  consideration  of the
     consulting  services  to be provided  under this  paragraph 2 and the other
     covenants contained in this Agreement,  within 15 days after July 31, 1997,
     the Company  will pay you a lump sum payment of $80,000.  This payment will
     not be treated as  compensation  for  purposes of any  retirement  or other
     benefit plan maintained by the Company.

3.   On August 1, 1997 your status will change from active to retired.

4.   You and your spouse are entitled to active employee medical in retirement.

5.   Based on your age at  retirement,  life insurance of $112,000 per year will
     be provided.

6.   Long Term Incentives are divided into two  components:  SVA Award and Stock
     Options.

          SVA Award:  Performance  permitting,  you will receive your previously
          earned SVA Award(s) on the regular  payout  cycle based on  previously
          established goals.

          Stock  Options:  Unvested  options will continue to vest in accordance
          with our  preestablished  schedule.  Vested  options must be exercised
          before your fifth anniversary after retirement.

7.   Executive Incentive  Compensation:  Vested awards and deferred compensation
     will be distributed according to your previous declarations.

8.   Executive tax assistance  and financial  planning are available to you as a
     retiring officer for the reminder of 1997 and calendar years 1998 and 1999,
     not to exceed $2500 per year.

9.   Outplacement  assistance of up to $1000 will be reimbursed for expenses you
     incur prior to August 1, 1998.

10.  In the event the NRC determines  individual  enforcement is appropriate for
     events  that  occurred  on  June  2,  1997,  Illinois  Power  will  provide
     appropriate  legal  representation to aid you in defense of NRC enforcement
     actions.

11.  Your company vehicle must be returned to the  Headquarter's  parking garage
     by August 1, 1997.

12.  You must make the  proper  arrangements  for out  processing  according  to
     Clinton Power Station Procedure.

13.  The  total  monthly  benefit  you are  entitled  to with a August  1,  1997
     retirement date is $3594.16  consisting of $2900.05 from the Qualified Plan
     and  $694.11  from  the   Supplemental   Retirement   Income  Plan  (Plan).
     Additionally,  by special Amendment to the Plan, an additional supplemental
     monthly  payment of $765.58  will be paid  through the Plan.  A  contingent
     annuity options available for your qualified benefit. The amount payable to
     you through the Plan is only paid while you are living.

14.  You  understand  and agree that the benefits  provided under this Agreement
     exceed those to which you would  otherwise  be entitled and Illinois  Power
     shall not be obligated to pay you any additional compensation or to provide
     any  additional  benefits to you except as provided in this Agreement or as
     required by law.

     15.  In  consideration of the foregoing,  you, on behalf of yourself,  your
          heirs, agents, successors, representatives and assigns, hereby release
          Illinois Power,  its past,  present and future  officers,  directors,,
          employees,   agents  and  representatives  and  their  successors  and
          assigns, from any and all claims of whatever sort which you had or now
          have against each or any one of them relating in any way to or arising
          out of your employment  with Illinois Power or the severance  thereof,
          including,  but not limited to, any claims of age discrimination under
          the  Age   Discrimination   in  Employment   Act  or  other   statute,
          constructive  discharge,  wrongful  termination,  or any other  claims
          under any federal,  state or local  statute,  ordinance or common law.
          Nothing in this paragraph  shall be construed to release any claims or
          waive any right to sue arising out of violations of this  Agreement or
          acts  subsequent  to the date of this  Agreement.  You are  advised to
          consult with your attorney prior to signing this Agreement.

          Illinois Power,  on behalf of itself and its past,  present and future
          officers,  directors,  employees,  agents and  representatives  hereby
          releases  you from any and all claims of whatever  sort which they had
          or now have  against you relating in any way to or arising out of your
          employment  with Illinois  Power.  Nothing in this paragraph  shall be
          construed  to release any claims or waive any right to sue arising out
          of violations of this Agreement or acts subsequent to the date of this
          Agreement.

          You  agree  that,  except  as  required  by law,  you  will not use or
          disclose any non-public  information  about the company,  and that you
          will promptly return all materials  containing  confidential  material
          about the  Company  which  still may be in your  possession.  You also
          agree to  cooperate  with the company in any third  party  lawsuits or
          other  claims  involving  the  Company,  to the extent that the claims
          relate to your work for the Company,  and the Company will provide you
          with reasonable compensation for the time you spend in connection with
          such cooperation.

If you  concur  with the terms of this  Agreement,  please  sign and date in the
appropriate place below.

                                                                Sincerely,


                                                                /s/Larry D. Haab
                                                                Larry D. Haab


Accepted and agreed to this
30 day of June, 1997



/s/Wilfred Connell
Wilfred Connell


<TABLE>
                                                                                                               Exhibit (12)(a) 
                                                                  ILLINOVA CORPORATION
                                                    STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO
                                                                     FIXED CHARGES
                                                                 (Thousands of Dollars)

                                                                                                                                   
                     Year ended December 31,              Supplemental**                                          Supplemental***
                                               -------------------------------------------------------------------------------------
                                                     1992      1993       1993       1994      1995      1996       1997        1997
<S>                                             <C>       <C>        <C>        <C>       <C>       <C>         <C>        <C>
                                                     ----      ----       ----       ----      ----      ----       ----       ----
Earnings Available for
Fixed Charges:
Net Income (Loss)....................           $  93,234 ($ 81,874) ($ 81,874) $ 151,786 $ 151,601 $ 191,021  ($ 90,553) ($ 90,553)
  Add:
   Income Taxes:
     Current .....................                 22,930    25,260     25,260     58,354    98,578   163,873     70,975     70,975
     Deferred - Net...............                 63,739    82,057     82,057     71,177    34,137   (16,028)    36,963     36,963
   Allocated income taxes ........                 (6,632)  (12,599)   (12,599)    (8,285)  (11,851)  (12,641)   (20,345)   (20,345)
   Investment tax credit - deferred                  (519)     (782)      (782)   (11,331)   (6,894)   (7,278)    (7,278)    (7,278)
   Income tax effect of disallowed costs              --    (70,638)   (70,638)       --        --        --         --          --
   Income tax effect of FAS 71 write-off ...          --        --         --         --        --        --    (117,998)  (117,998)
   Interest on long-term debt.......              160,795   154,110    154,110    135,115   125,581   118,438    116,137    116,137
   Amortization of debt expense and
     premium-net, and other interest charges       12,195    17,007     17,007     15,826    29,558    24,031     27,984     27,984
   One-third of all rentals (Estimated to be
     representative of the interest component)      5,117     5,992      5,992      5,847     5,221     4,346      4,229      4,229
   Interest on in-core fuel                         8,278     6,174      6,174      7,185     6,716     4,757      3,842      3,842
   Disallowed Clinton plant costs...                  --        --     270,956        --        --        --         --          --
   FAS 71 Regulatory Write-Offs.....                  --        --         --         --        --        --         --     313,030
                                                --------- ---------  ---------   --------- --------- --------  ---------   --------
Earnings (loss) available for fixed             $ 359,137 $ 124,707  $ 395,663  $ 425,674 $ 432,647 $ 470,519  $  23,956  $ 336,986
charges
                                                =========  ========= =========   ========  ========  =========  =========  =========

Fixed charges:
  Interest on long-term debt                    $ 160,795  $ 154,110 $ 154,110  $ 135,115 $ 125,581  $ 118,438  $ 116,137  $ 116,137
  Amortization of debt expense and
    premium-net, and other interest charges        25,785     27,619    27,619     25,381    38,147     30,663     32,928     32,928
  One-third of all rentals (Estimated to be
    representative of the interest component)       5,117      5,992     5,992      5,847     5,221      4,346      4,229      4,229
                                                ---------   --------  --------  --------- ---------  ---------  ---------  ---------

Total Fixed Charges........................     $ 191,697  $ 187,721 $ 187,721  $ 166,343 $ 168,949  $ 153,447  $ 153,294  $ 153,294
                                                =========  ========= =========  ========= =========  =========  =========  =========

Ratio of earnings to fixed charges                   1.87       0.66*     2.11       2.56      2.56       3.07       0.16*      2.20
                                                =========  =========  ========  ========= =========  =========  =========  =========




     *    Earnings are  inadequate to cover fixed charges.  Additional  earnings
          (thousands)  for 1993 and 1997 of $63,014 and $129,338,  respectively,
          are  required  to  attain  a  one-to-one  ratio of  Earnings  to Fixed
          Charges.

     **   Supplemental  ratio of earnings to fixed charges  presented to exclude
          nonrecurring item - Disallowed Clinton plant costs.

     ***  Supplemental  ratio of earnings to fixed charges  presented to exclude
          write-off  related  to  the  discontinued   application  of  SFAS  71,
          "Accounting  for the Effects of Certain Types of  Regulation"  for the
          generation segment of the business.

</TABLE>



<TABLE>
                                                                                                                 Exhibit (12)(b)
                                                                 ILLINOIS POWER COMPANY
                                                    STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO
                                                                     FIXED CHARGES
                                                                 (Thousands of Dollars)

                                                                                              
                Year Ended December 31,                   Supplemental**                                           Supplemental***
                            -------------------------------------------------------------------------------------------------------
                                                  1992        1993       1993      1994      1995        1996        1997      1997
                                                  ----        ----       ----      ----      ----        ----        ----      ----
Earnings Available for
Fixed Charges:
<S>                                            <C>        <C>        <C>        <C>        <C>        <C>       <C>       <C>       
Net Income (Loss)                              $ 122,088  ($ 56,038) ($ 56,038) $ 180,242  $ 182,713  $ 228,618 ($ 65,669)($ 65,669)
  Add:
   Income Taxes:
     Current                                      22,930     25,260     25,260     58,354     98,578    163,873    72,680    72,680
     Deferred - Net                               63,739     82,057     82,057     71,177     34,137    (16,028)   36,963    36,963
   Allocated income taxes                         (6,632)   (12,599)   (12,599)    (8,285)    (8,417)    (2,642)   (1,446)   (1,446)
   Investment tax credit - deferred                 (519)      (782)      (782)   (11,331)    (6,894)    (7,278)   (7,278)   (7,278)
   Income tax effect of disallowed costs            --      (70,638)   (70,638)      --         --         --        --        --
   Income tax effect of FAS 71 write-off            --         --         --         --         --         --    (117,998) (117,998)
   Interest on long-term debt                    160,795    154,110    154,110    135,115    125,581    118,438   109,595   109,595
   Amortization of debt expense and
     premium-net, and other interest charges      12,195     17,007     17,007     15,826     29,558     22,325     26,260   26,260
   One-third of all rentals(Estimated to be
     representative of the interest component)     5,117      5,992      5,992      5,847      5,221      4,346      4,229    4,229
   Interest on in-core fuel                        8,278      6,174      6,174      7,185      6,716      4,757      3,842    3,842
   Disallowed Clinton plant costs                   --         --      270,956       --         --         --         --       --
   FAS 71 Regulatory Write-Offs                     --         --         --         --         --         --         --    313,030
                                               ---------  ---------  ---------  ---------  ---------  ---------  --------- ---------
Earnings (loss) available for fixed charges    $ 387,991  $ 150,543  $ 421,499  $ 454,130  $ 467,193  $ 516,409  $  61,178 $ 374,208
                                               =========  =========  =========  =========  =========  =========  ========= =========

Fixed charges:
    Interest on long-term debt                 $ 160,795  $ 154,110  $ 154,110  $ 135,115  $ 125,581  $ 118,438  $ 109,595 $ 109,595
    Amortization of debt expense and
      premium-net, and other interest charges     25,785     27,619     27,619     25,381     38,147     28,957     31,204    31,204
    One-third of all rentals (Estimated to be
      representative of the interest component)    5,117      5,992      5,992      5,847      5,221      4,346      4,229     4,229
                                               ---------  ---------  ---------  ---------  ---------  ---------  --------- ---------

Total Fixed Charges                            $ 191,697  $ 187,721  $ 187,721  $ 166,343  $ 168,949  $ 151,741  $ 145,028 $ 145,028
                                               =========  =========  =========  =========  =========  =========  ========= =========

Ratio of earnings to fixed charges                  2.02     0.80 *       2.25       2.73       2.77       3.40     0.42 *      2.58
                                               =========  =========  =========  =========  =========  =========  ========= =========



     *    Earnings are  inadequate to cover fixed charges.  Additional  earnings
          (thousands)  for 1993 and 1997 of $63,014 and  $83,850,  respectively,
          are  required  to  attain  a  one-to-one  ratio of  Earnings  to Fixed
          Charges.

     **   Supplemental  ratio of earnings to fixed charges  presented to exclude
          nonrecurring item - Disallowed Clinton plant costs.

     ***  Supplemental  ratio of earnings to fixed charges  presented to exclude
          write-off  related  to  the  discontinued   application  of  SFAS  71,
          "Accounting  for the Effects of Certain Types of  Regulation"  for the
          generation segment of the business.


</TABLE>

1997 PROXY STATEMENT AND ANNUAL REPORT TO SHAREHOLDERS
UNLOCKING THE POWER 1997

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

Proxy Statement
Table of Contents

Notice of Annual Meeting                                2

Proxy Statement                                         3

Appendix: 1997 Annual Report to Shareholders          a-1

To the Shareholders 
of Illinova Corporation:

Notice is Hereby  Given that the  Annual  Meeting of  Shareholders  of  Illinova
Corporation  ("Illinova") will be held at 10 a.m.  Wednesday,  April 8, 1998, at
Shilling Community  Education Center,  Richland  Community College,  One College
Park, Decatur, Illinois 62521, for the following purposes:

(1) To elect the Board of Directors for the ensuing year.

(2)  To transact any other  business  which may properly come before the meeting
     or any adjournment.

Shareholders  of record at the close of business  on  February 9, 1998,  will be
entitled to receive notice of and to vote at the Annual Meeting.

By Order of the Board of Directors,

Leah Manning Stetzner,
General Counsel and Corporate Secretary

Decatur, Illinois
March 10, 1998

IMPORTANT

Illinova  invites each of its  approximately  35,000  shareholders to attend the
Annual  Meeting.  Shareholders  will be admitted on verification of record share
ownership at the admission  desk.  Shareholders  who own shares  through  banks,
brokerage  firms,  nominees or other  account  custodians  must present proof of
beneficial  share  ownership  (such as a  brokerage  account  statement)  at the
admission desk. If you are unable to be present at the meeting,  it is important
that you sign and return the enclosed  proxy, no matter how many shares you own.
An envelope  on which  postage  will be paid by  Illinova  is enclosed  for that
purpose.

     Return of your executed  proxy will ensure that you are  represented at the
Annual Meeting. Your cooperation is appreciated.
<PAGE>

PROXY STATEMENT

Solicitation and Revocation of Proxies

This Proxy  Statement is furnished in connection  with a solicitation of proxies
by the  Board  of  Directors  of  Illinova,  for use at the  Annual  Meeting  of
Shareholders  to be  held  at  Shilling  Community  Education  Center,  Richland
Community  College,  One  College  Park,  Decatur,  Illinois  62521,  at 10 a.m.
Wednesday, April 8, 1998, and at any adjournment thereof (the "Annual Meeting").
Any shareholder giving a proxy may revoke it at any time by giving a later proxy
or by giving written notice of revocation to the Corporate Secretary of Illinova
prior to the Annual  Meeting.  All duly executed  proxies  received prior to the
Annual Meeting will be voted.

     Shares credited to the accounts of  participants  in Illinova's  Investment
Plus Plan and Illinois Power Company's  Incentive Savings Plans will be voted in
accordance with the  instructions of the participants or otherwise in accordance
with the terms of those plans.

Voting Rights

Shareholders of record at the close of business on Monday, February 9, 1998 (the
"Record Date"),  will be entitled to receive notice of and to vote at the Annual
Meeting. As of that date,  Illinova had outstanding  71,701,937 shares of Common
Stock.  Shareholders who are present at the Annual Meeting in person or by proxy
will be entitled  to one vote for each share of  Illinova's  Common  Stock which
they held of record at the close of business on the Record Date.

     When  voting  for   candidates   nominated  to  serve  as  directors,   all
shareholders  will be  entitled  to 11 votes  (the  number  of  directors  to be
elected)  for each of their  shares and may cast all of their  votes for any one
candidate  whose name has been  placed in  nomination  prior to the  voting,  or
distribute  their votes among two or more such candidates in such proportions as
they determine.  In voting on other matters  presented for  consideration at the
Annual Meeting,  each shareholder will be entitled to one vote for each share of
Common  Stock held of record at the close of  business on the Record  Date.  The
affirmative  vote of the  holders  of a majority  of the shares of Common  Stock
present in person or  represented  by proxy and  entitled  to vote at the Annual
Meeting is required for the election of directors.

Annual Report, Proxy and Proxy Statement

Accompanying  this  Proxy  Statement,   which  includes  Consolidated  Financial
Statements,  is a Notice of Annual Meeting of Shareholders,  a form of Proxy and
the Summary Annual Report to  Shareholders  covering  operations of Illinova for
the year 1997. This Proxy Statement and  accompanying  documents are first being
mailed to shareholders on or about March 10, 1998.

Board of Directors

Information Regarding the Board of Directors

The Board of Directors  held eight Board  meetings  during 1997.  Other than Mr.
Adorjan,  who joined the Board in August 1997,  and Mr. Berry,  who retired from
the Board  December 1, 1997,  all directors  attended at least 75 percent of the
aggregate meetings of the Board and Committees of which they were members during
1997. The Board has three standing committees:  the Audit Committee, the Finance
Committee, and the Compensation and Nominating Committee.

     The duties and members of the standing committees are:

Audit Committee

(1) Review with the  Chairman,  President  and Chief  Executive  Officer and the
independent  accountants the scope and adequacy of Illinova's system of internal
controls;  (2) review the scope and results of the annual examination  performed
by the independent accountants; (3) review the activities of Illinova's internal
auditors;  (4)  report  its  findings  to  the  Board  and  provide  a  line  of
communication  between  the  Board  and  both  the  internal  auditors  and  the
independent  accountants;  and (5) recommend to the Board the appointment of the
independent   accountants  and  approval  of  the  services   performed  by  the
independent accountants, considering their independence with regard thereto.

     The Audit Committee met three times during 1997.

     This Committee consists of the following  non-employee  directors ("Outside
Directors"):  Robert M. Powers, Chairman,  Richard R. Berry, C. Steven McMillan,
Sheli Z. Rosenberg, Walter M. Vannoy, and Marilou von Ferstel.
<PAGE>

Finance Committee

(1) Review  management's cash flow forecasts,  financial forecasts and financing
program,  and make  recommendations  to the Board regarding the approval of such
plans;  (2)  review  Illinova's  banking  relationships,   short-term  borrowing
arrangements,  dividend  policies,  arrangements  with the  transfer  agent  and
registrar, investment objectives and the performance of Illinois Power's pension
and other trust funds,  evaluate fund managers,  and make recommendations to the
Board concerning such matters;  (3) review Illinova's risk management  programs,
including insurance coverage, and make recommendations to the Board; and (4) act
in an advisory capacity to management, the Board of Directors, and the Chairman,
President and Chief  Executive  Officer on other  financial  matters as they may
arise.

     The Finance Committee met three times during 1997.

     This Committee  consists of the following  members of the Board:  Walter D.
Scott,  Chairman,  J. Joe Adorjan,  Richard R. Berry,  Larry D. Haab,  C. Steven
McMillan, Sheli Z. Rosenberg, Marilou von Ferstel, and John D. Zeglis.

Compensation and 
Nominating Committee

(1) Review  performance and recommend  salaries plus other forms of compensation
of elected Illinova  officers and the Board of Directors;  (2) review Illinova's
benefit  plans for elected  Illinova  officers and make  recommendations  to the
Board  regarding  any changes  deemed  necessary;  (3) review with the Chairman,
President and Chief  Executive  Officer any  organizational  or other  personnel
matters;  and (4)  recommend  to the Board  nominees  to stand for  election  as
director to fill vacancies on the Board of Directors as they occur.

     The  Compensation  and  Nominating  Committee  will consider  shareholders'
recommendations  for  nominees for director  made  pursuant to timely  notice in
writing  addressed to the Chairman of the Committee at the executive  offices of
Illinova.   The  recommendation   should  include  a  full  description  of  the
qualifications and business and professional experience of the proposed nominees
and a statement of the nominees'  willingness to serve. To be timely, the notice
must be delivered to or mailed and received at the executive offices of Illinova
not less than 90 nor more than 120 days prior to the Annual Meeting.

     The Compensation and Nominating Committee met seven times during 1997.

     This  Committee  consists of the  following  Outside  Directors:  Ronald L.
Thompson, Chairman, J. Joe Adorjan, C. Steven McMillan, Robert M. Powers, Walter
D. Scott, Marilou von Ferstel, and John D. Zeglis.
<PAGE>

Board Compensation

The Outside  Directors  of Illinova  receive a retainer fee of $18,000 per year.
Outside Directors who also chair Board Committees  receive an additional $2,000,
increased  in February  1998 to $2,500,  per year  retainer.  Outside  Directors
receive  a grant of 650  shares  of  Common  Stock  on the  date of each  Annual
Shareholders Meeting,  representing payment in lieu of attendance-based fees for
all Board and  Committee  meetings  to be held  during the  subsequent  one-year
period.  Outside  Directors  elected to the Board  between  Annual  Shareholders
Meetings are paid $850 for each Board and Committee  meeting  attended  prior to
the first Annual Shareholders Meeting after their election to the Board.

     Illinova had a Retirement Plan for Outside Directors. Under this plan, each
Outside  Director who attained age 65 and served on the Board for a period of 60
or more consecutive  months was eligible for annual  retirement  benefits at the
rate of the annual  retainer fee in effect when the director  retired.  In 1996,
the Board of Directors  adopted a Comprehensive  Deferred Stock Plan for Outside
Directors,  replacing the Retirement  Plan.  Each former Outside  Director whose
right to receive the  retirement  benefit had vested  continues  to receive such
benefits  in  accordance  with the terms of the  Retirement  Plan.  All  Outside
Directors  serving at the time this new plan was adopted were granted a lump sum
amount based on the net present  value of these  benefits to them,  were they to
have retired under the Retirement  Plan,  based on the number of years they have
served on the Board but not to exceed 10. This dollar amount was converted  into
stock units, based on the then market value of Illinova Common Stock, and placed
into an  account.  The  value  of  these  stock  units  is to be paid out to the
director in cash on  termination  of service,  based on the then market value of
Illinova Common Stock, plus dividend equivalents, in a lump sum or installments.
In  addition,  each  Outside  Director  receives an annual  award of stock units
having  a  value  of  $6,000,  to be  paid to the  Outside  Director  in cash on
retirement,  at once or in  installments  as the  director  may elect,  with the
amount of such payment  determined by  multiplying  the number of stock units in
the account times the then market value of Illinova Common Stock, and adding the
dividend equivalents attributable to such stock units.

     Pursuant to Illinova's  Deferred  Compensation Plan for Certain  Directors,
the  Outside  Directors  may elect to defer all or any portion of their fees and
stock grants until  termination  of their  services as directors.  Such deferred
amounts are converted into stock units representing  shares of Illinova's Common
Stock with the value of each stock unit based on the last  reported  sales price
of such  stock.  Additional  credits  are made to the  participating  director's
account in dollar  amounts equal to the dividends paid on Common Stock which the
director  would have  received if the  director had been the record owner of the
shares  represented  by stock  units,  and  these  amounts  are  converted  into
additional stock units. On termination of the participating  directors' services
as directors, payment of their deferred fees and stock grants was made in shares
of  Common  Stock in an amount  equal to the  aggregate  number  of stock  units
credited to their accounts. The plan was amended in 1997 to provide for a payout
in cash instead of shares of Common Stock.  Deferred amounts are still converted
into  stock  units  representing  shares of Common  Stock with the value of each
stock unit based on the last reported sales price of such stock. Payment is made
in  cash,  in a lump  sum or  installments,  as soon as  practical  following  a
director's termination.  The cash paid on termination equals the number of stock
units times the share price at the close of market on the last  business  day of
the month preceding termination. No other payments are made after service on the
Board ceases.

Election of Directors

Illinova's  entire  Board of  Directors  is  elected at each  Annual  Meeting of
Shareholders.   Directors   hold  office  until  the  next  Annual   Meeting  of
Shareholders or until their successors are elected and qualified.  At the Annual
Meeting a vote will be taken on a proposal to elect the 11  directors  nominated
by Illinova's Board of Directors.  The names and certain additional  information
concerning  each of the director  nominees is set forth on the following  pages.
The dates  shown for  service as a  director  include  service as a director  of
Illinois  Power  prior to the May 1994  restructuring  in which  Illinois  Power
became a subsidiary of Illinova. If any nominee should become unable to serve as
a director,  another  nominee may be selected by the current Board of Directors.
Walter M.  Vannoy  would  normally  have not been  eligible  for  election  as a
director at the Annual  Meeting of  Shareholders  pursuant to a Bylaw  provision
which  mandates  retirement  from Board  service at age 70.  Because  there is a
current need for his nuclear  expertise,  the Board of Directors  has elected to
waive  this  requirement  in Mr.  Vannoy's  case,  and he has agreed to serve if
elected.
<PAGE>
BOARD OF DIRECTORS

Name of Director Nominee, Age,                               Year in Which First
Business Experience and                                       Elected a Director
Other Information                                                    of Illinova

J. Joe Adorjan, 59                                                          1997

Chairman  and Chief  Executive  Officer  of  Borg-Warner  Security  Corporation,
Chicago, Ill., a security systems services firm, since 1995. He was President of
Emerson  Electric  Company from 1993 to 1995. Prior to that, he was Chairman and
Chief Executive Officer of ESCO Electronics Corporation. He is a director of The
Earthgrains  Company,  ESCO Electronics  Corporation and Goss Graphics  Systems,
Inc.

Larry D. Haab, 60                                                           1986

Chairman,  President,  and Chief  Executive  Officer of Illinova  since December
1993,  and of Illinois  Power since June 1991, and an employee of Illinois Power
since  1965.  He is a director  of First  Decatur  Bancshares,  Inc.;  The First
National Bank of Decatur; and Firstech, Incorporated.

C. Steven McMillan, 52                                                      1996

President,  Chief  Operating  Officer,  and  Director  of Sara Lee  Corporation,
Chicago, Ill., a global packaged food and consumer products company, since 1997.
He was  Executive  Vice  President of Sara Lee from 1993 to 1997 and Senior Vice
President-Strategy Development from 1986 to 1993. He is Chairman of the Board of
Electrolux Corporation.

Robert M. Powers, 66                                                        1984

From 1980 until  retirement in December 1988, Mr. Powers was President and Chief
Executive  Officer of A. E.  Staley  Manufacturing  Company,  Decatur,  Ill.,  a
processor of grain and oil seeds. He is a director of A. E. Staley Manufacturing
Company.

Sheli Z. Rosenberg, 56                                                      1997

President and Chief  Executive  Officer  since 1994 and General  Counsel 1980 to
1994 of Equity Group Investments, Inc., Chicago, Ill., a privately held business
conglomerate holding controlling  interests in nine publicly traded corporations
involved in basic manufacturing,  radio stations,  retail,  insurance,  and real
estate.  She is a director of American  Classic  Voyages  Company;  Quality Food
Centers, Inc.; Jacor Communications,  Inc.; Anixter International,  Inc.; Equity
Office Properties Trust;  Equity Residential  Properties Trust; CVS Corporation;
and Manufactured Home Communities, Inc.

Walter D. Scott, 66                                                         1990

Professor of Management and Senior Austin Fellow,  J. L. Kellogg Graduate School
of  Management,  Northwestern  University,  Evanston,  Ill.,  since 1988. He was
Chairman of GrandMet  USA from 1984 to 1986 and  President  and Chief  Executive
Officer of IDS Financial Services from 1980 to 1984. He is a director of Chicago
Title and Trust Company, Chicago Title Insurance Company,  Neodesic Corporation,
Orval Kent Holding Company, Inc., and Intermatic Incorporated.

Joe J. Stewart, 59                                                          1998

President of BWX  Technologies,  Inc.,  formerly The Babcock & Wilcox Government
Group, Lynchburg,  Va., a diversified energy equipment and services company, and
Executive  Vice  President  of  McDermott  International,  Inc.  (parent  of BWX
Technologies,  Inc.  and The  Babcock  & Wilcox  Company),  since  1995.  He was
President  and Chief  Operating  Officer of The Babcock  and Wilcox  Company and
Executive Vice President of McDermott International, Inc., from 1993 to 1995 and
Executive Vice President of the Power Generation Group of The Babcock and Wilcox
Company from 1987 to 1993.
<PAGE>

Ronald L. Thompson, 48                                                      1991

Chairman and Chief Executive Officer of Midwest Stamping and Manufacturing  Co.,
Bowling Green,  Ohio, a  manufacturer  of automotive  parts,  since 1993. He was
President and Chief Executive Officer and a director of The GR Group,  Inc., St.
Louis,  Mo.,  from 1980 to 1993.  He is a director  of  Teachers  Insurance  and
Annuity Association, and Ryerson Tull.

Walter M. Vannoy, 70                                                        1990

Chairman until retirement in May 1995 and Chief Executive  Officer from May 1994
until  January  1995  of  Figgie  International,   Inc.,  Willoughby,   Ohio,  a
diversified  operating  company serving  consumer,  industrial,  technical,  and
service  markets  world-wide.  From  1980  to 1988 he was  President  and  Chief
Operating   Officer,   Babcock  and  Wilcox,  and  Vice  Chairman  of  McDermott
International.

Marilou von Ferstel, 60                                                     1990

Executive Vice President and General Manager of Ogilvy Adams & Rinehart, Inc., a
public relations firm in Chicago, Ill., from June 1990 until retirement in April
1997. She was Managing  Director and Senior Vice President of Hill and Knowlton,
Chicago, Ill., from 1981 to 1990. She is a director of Walgreen Company.

John D. Zeglis, 50                                                          1993

President of AT&T,  Basking Ridge, N.J., a diversified  communications  company,
since October 1997. He was Vice Chairman from June 1997 to October 1997,  Senior
Executive Vice President and General Counsel,  from 1995 to June 1997 and Senior
Vice President - General Counsel and Government Affairs from 1989 to 1995. He is
a director of the Helmerich & Payne Corporation.

Security Ownership of Management and 
Certain Beneficial Owners

The table below shows shares of Illinova Common Stock  beneficially  owned as of
January 31, 1998,  by each director  nominee,  executive  officers  named in the
Summary Compensation Table, and entities owning more than 5 percent.

                                     Number         Number of Stock
                                    of Shares       Units in Deferred
    Name of                        Beneficially      Compensation       Percent
Beneficial Owner                   Owned (1)(2)         Plans           of Class

J. Joe Adorjan                               0               0              (3)
Larry D. Haab                           68,250               0              (3)
C. Steven McMillan                       1,300             289              (3)
Robert M. Powers                         8,550             289              (3)
Sheli Z. Rosenberg                           0           1,539              (3)
Walter D. Scott                          5,150             289              (3)
Joe J. Stewart                               0               0              (3)
Ronald L. Thompson                       3,677           3,275              (3)
Walter M. Vannoy                         5,010             289              (3)
Marilou von Ferstel                      4,420           1,603              (3)
John D. Zeglis                           2,626           1,603              (3)
Paul L. Lang                            21,216               0              (3)
Larry F. Altenbaumer                    13,092               0              (3)
John G. Cook                            11,894               0              (3)
Robert A. Schultz                        8,551               0              (3)
Hotchkis & Wiley (4)                 6,321,233                              8.8%
Merrill Lynch Asset
Management, L.P.(5)                  6,321,253                              8.8%
State of Michigan
Retirement Systems(6)                3,714,300                             5.18%

(1) With sole voting and/or investment power.

(2) Includes the following shares issuable pursuant to stock options exercisable
March 31, 1998: Mr. Haab, 56,900; Mr. Lang, 17,800; Mr. Altenbaumer, 17,800; Mr.
Cook, 9,900; and Mr. Schultz, 6,750.

(3) No  director  or  executive  officer  owns any other  equity  securities  of
Illinova  or as  much as 1% of the  Common  Stock.  As a  group,  directors  and
executive  officers of Illinova and Illinois  Power own 187,021 shares of Common
Stock (less than 1%).

(4) With sole voting and dispositive  power, as of January 31, 1998,  Hotchkis &
Wiley, 800 W. 6th Street, 5th Floor, Los Angeles, CA 90017.

(5) With shared voting and  dispositive  power,  per February 2, 1998,  Schedule
13G, Merrill Lynch Asset Management,  L.P., 800 Scudders Mill Road,  Plainsboro,
NJ 08536.

(6) With sole voting and  dispositive  power,  as of January 31, 1998,  State of
Michigan Retirement Systems, 430 W. Allegan, Lansing, MI 48909.
<PAGE>

Executive Compensation

The  following  table  sets  forth a summary  of the  compensation  of the Chief
Executive Officer and the four other most highly compensated  executive officers
of  Illinova  subsidiaries  for the  years  indicated.  The  compensation  shown
includes all  compensation  paid for service to Illinova  and its  subsidiaries,
including  Illinois  Power,  Illinova  Generating  Company,  and Illinova Energy
Partners.
<TABLE>

                                                     Summary Compensation Table
                                                                                                    Long-Term Compensation
                                                           Annual Compensation                      Awards
                                                                                Other     Restricted     Securities       All Other
                                                                 Bonus          Annual    Stock Awards   Underlying     Compensation
Name and Principal Position            Year       Salary          (1)        Compensation     (2)         Options           (3)
<S>                                    <C>       <C>            <C>          <C>           <C>           <C>            <C>

Larry D. Haab                          1997      $514,952       $41,840      $ 16,557      $ 41,840      20,000 shs.        $2,614
  Chairman, President and              1996       493,709        69,267        15,973        69,267      22,000 shs.         2,615
  Chief Executive Officer of           1995       472,250        91,144        19,088        91,144      20,000 shs.         2,550
  Illinova and Illinois Power

Paul L. Lang                           1997      $242,325      $ 10,602      $  8,305      $ 10,601       6,500 shs.        $2,615
  Senior Vice President                1996       233,450        19,747         8,863        19,747       6,500 shs.         2,595
  of Illinois Power                    1995       222,812        23,841         8,265        23,841       6,500 shs.         2,510

Larry F. Altenbaumer                   1997      $232,048       $ 8,992      $  9,521      $  8,992       6,500 shs.        $1,985
  Chief Financial Officer,             1996       222,374        19,832         8,459        19,832       7,500 shs.         1,976
  Treasurer and Controller             1995       204,937        20,391         7,686        20,391       6,500 shs.         2,378
  of Illinova, and Senior
  Vice President and Chief
  Financial Officer of
  Illinois Power

John G. Cook                           1997      $203,413      $     -       $  7,642      $     -        6,000 shs.       $ 2,575
  Senior Vice President                1996       196,474       16,293          7,409        16,293       6,500 shs.         2,575
  and former chief nuclear             1995       179,069       16,620          6,930        16,620       4,500 shs.         2,530
  officer of Illinois Power

Robert A. Schultz                      1997      $185,560      $     -       $  8,480      $      -       6,000 shs.       $ 2,214
  Vice President of Illinois           1996       176,170       23,604          6,957        23,604       6,500 shs.         2,114
  Power, formerly President            1995       150,000       20,539          7,316        20,639       4,000 shs.         2,584
  of Illinova Energy Partners
</TABLE>

(1)  The amounts  shown in this column are the cash award portion of grants made
     to these  individuals  under  the  Executive  Incentive  Compensation  Plan
     ("Compensation  Plan")  for  1997,  including  amounts  deferred  under the
     Executive Deferred Compensation Plan. See the Compensation Plan description
     in footnote (2) below.

(2)  This  table sets forth  stock unit  awards for 1997 under the  Compensation
     Plan. One-half of each year's award under this plan is converted into stock
     units  representing  shares of Illinova  Common  Stock based on the closing
     price of Common Stock on the last trading day of the award year.  The other
     one-half  of the award is cash and is  included  under Bonus in the Summary
     Compensation Table. Stock units awarded in a given year, together with cash
     representing  the  accumulated  dividend  equivalents on those stock units,
     become  fully vested after a  three-year  holding  period.  Stock units are
     converted into cash based on the closing price of Common Stock on the first
     trading day of the distribution  year.  Participants  (or  beneficiaries of
     deceased  participants)  whose employment is terminated by retirement on or
     after age 55, disability,  or death receive the present value of all unpaid
     awards on the date of such  termination.  Participants  whose employment is
     terminated for reasons other than retirement,  disability, or death forfeit
     all unvested awards. In the event of a termination of employment within two
     years after a change in control of  Illinova,  without good cause or by any
     participant  with good reason,  all awards of the participant  become fully
     vested and payable.  As of December 31, 1997, named executive officers were
     credited with the following total aggregate  number of unvested stock units
     under the Compensation Plan since its inception, valued on the basis of the
     closing price of Common Stock on December 31, 1997:  Mr. Haab,  7,619 units
     valued  at  $205,241;   Mr.  Lang,  2,044  units  valued  at  $55,071;  Mr.
     Altenbaumer, 1,862 units valued at $50,151; Mr. Cook, 1,250 units valued at
     $33,685; Mr. Schultz,  1,509 units valued at $40,635.  Although stock units
     have been  rounded,  valuation  is based on total  stock  units,  including
     partial shares.

(3)  The amounts shown in this column are Illinois Power's  contributions  under
     the  Incentive  Savings  Plan  (including  the  market  value of  shares of
     Illinova Common Stock at the time of allocation).
<PAGE>

The  following  tables  summarize  grants  during  1997 of stock  options  under
Illinova's  1992  Long-Term  Incentive  Compensation  Plan  ("LTIC")  and awards
outstanding at year end for the  individuals  named in the Summary  Compensation
Table.
<TABLE>
                                                           Option Grants In 1997


                           Individual Grants

                  Number of Securities      % of Total Options
                  Underlying Options        Granted to Employees       Exercise or Base                               Grant Date
                       Granted (1)                   in 1997          Price Per Share (1)       Expiration Date    Present Value (2)
<S>                       <C>                          <C>                   <C>                 <C>                    <C>    
Larry D. Haab            20,000                       24%                    $26.125             2/12/2007              $107,200

Paul L. Lang              6,500                        8%                     26.125             2/12/2007                34,840

Larry F. Altenbaumer      6,500                        8%                     26.125             2/12/2007                34,840
  
John G. Cook              6,000                        7%                     26.125             2/12/2007                32,160

Robert A. Schultz         6,000                        7%                     26.125             2/12/2007                32,160
</TABLE> 

(1)  Each option  becomes  exercisable  on February 12, 2000. In addition to the
     specified  expiration  date, the grant expires on the first  anniversary of
     the recipient's  death and/or 5 years following date of retirement,  and is
     not exercisable in the event a recipient's  employment  terminates.  In the
     event of certain  change-in-control  circumstances,  the  Compensation  and
     Nominating  Committee may declare the option immediately  exercisable.  The
     exercise  price of each  option  is equal to the fair  market  value of the
     Common Stock on the date of the grant. Recipients shall also receive, on or
     shortly after February 12, 2000, a target performance award,  determined by
     calculating  the  difference  between the return  earned by Illinova on its
     invested  capital and its cost of capital (the  "spread"),  then  comparing
     this spread to that of a peer group and reducing or  increasing  the target
     award depending on Illinova's  relative  performance,  but not reducing the
     payment below zero.  The target award is equal to one-half of the mid-point
     of compensation  for each officer's  salary grade (a  market-based  number)
     times  a  percentage,   determined  by  the   Compensation  and  Nominating
     Committee.  In 1997 those percentages ranged between 20 and 45 percent.  At
     the discretion of the Board of Directors, the foregoing payment may be made
     in the form of  Illinova  Common  Stock of  equivalent  value  based on the
     average New York Stock Exchange price of the stock during February 2000, or
     in cash.

(2)  The Grant Date Present Value has been  calculated  using the  Black-Scholes
     option  pricing model.  Disclosure of the Grant Date Present Value,  or the
     potential  realizable value of option grants assuming 5% and 10% annualized
     growth  rates,  is  mandated  by  regulation;  however,  Illinova  does not
     necessarily  view  the  Black-Scholes  pricing  methodology,  or any  other
     present  methodology,  as a valid or accurate means of valuing stock option
     grants. The calculation was based on the following  assumptions:  (i) As of
     the grant date, Illinova's calculated  Black-Scholes ratio was .2248. After
     discounting  for  risk  of  forfeiture  at  three  percent  per  year  over
     Illinova's three-year vesting schedule, the ratio is reduced to .2052; (ii)
     An  annual  dividend  yield on  Illinova  Common  Stock of  4.11%;  (iii) A
     risk-free  interest  rate of  6.57%,  based on the  yield of a  zero-coupon
     government  bond  maturing  at the end of the option  term;  and (iv) Stock
     volatility of 19.54%.
<TABLE>

                              Aggregated Option and Fiscal Year-End Option Value Table

                        Number of Securities Underlying Unexercised                 Value of Unexercised In-the-Money
                                 Options at Fiscal Year-End                           Options at Fiscal Year-End
Name                             Exercisable/Unexercisable                            Exercisable/Unexercisable
<S>                              <C>                                                      <C>    
Larry D. Haab                    56,900 shs./62,000 shs.                                  $237,414/$57,400

Paul L. Lang                     17,800 shs./19,500 shs.                                   $75,148/$18,655

Larry F. Altenbaumer             17,800 shs./20,500 shs.                                   $75,148/$18,655

John G. Cook                      9,900 shs./17,000 shs.                                   $43,634/$14,130

Robert A. Schultz                 6,750 shs./16,500 shs                                    $29,165/$13,100
</TABLE>
<PAGE>

Pension Benefits

Illinois Power  maintains a Retirement  Income Plan for Salaried  Employees (the
"Retirement  Plan")  providing  pension  benefits  for  all  eligible  salaried
employees.  In addition to the Retirement Plan,  Illinois Power also maintains a
nonqualified  Supplemental  Retirement  Income Plan for Salaried  Employees (the
"Supplemental  Plan") that covers certain  officers  eligible to participate in
the  Retirement  Plan and provides for payments  from general  funds of Illinois
Power of any monthly  retirement  income not payable under the  Retirement  Plan
because of benefit limits imposed by law or because of certain  Retirement  Plan
rules limiting the amount of credited service accrued by a participant.

     The  following  table  shows the  estimated  annual  pension  benefits on a
straight life annuity basis payable upon  retirement  based on specified  annual
average  earnings  and  years  of  credited  service  classifications,  assuming
continuation of the Retirement Plan and  Supplemental  Plan and employment until
age 65. This table does not show, but any actual pension benefit  payments would
be subject to, the Social Security offset.
<TABLE>

                    Estimated Annual Benefits (rounded)
<S>         <C>        <C>        <C>        <C>        <C>    
   Annual   15 Yrs.    20 Yrs.    25 Yrs.    30 Yrs.    35 Yrs.
  Average  Credited   Credited   Credited   Credited   Credited
 Earnings   Service    Service    Service    Service    Service

$125,000   $ 37,500   $ 50,000   $ 62,500   $ 75,000   $ 87,500

 150,000     45,000     60,000     75,000     90,000    105,000

 175,000     52,500     70,000     87,500    105,000    122,500

 200,000     60,000     80,000    100,000    120,000    140,000

 250,000     75,000    100,000    125,000    150,000    175,000

 300,000     90,000    120,000    150,000    180,000    210,000

 350,000    105,000    140,000    175,000    210,000    245,000

 400,000    120,000    160,000    200,000    240,000    280,000

 450,000    135,000    180,000    225,000    270,000    315,000

 500,000    150,000    200,000    250,000    300,000    350,000

 550,000    165,000    220,000    275,000    330,000    385,000

 600,000    180,000    240,000    300,000    360,000    420,000

 650,000    195,000    260,000    325,000    390,000    455,000

 700,000    210,000    280,000    350,000    420,000    490,000
</TABLE>

     The earnings used in determining pension benefits under the Retirement Plan
are the participants'  regular base  compensation,  as set forth under Salary in
the Summary Compensation Table.

     At December 31,  1997,  for  purposes of both the  Retirement  Plan and the
Supplemental  Plan,  Messrs.  Haab,  Lang,  Altenbaumer,  Cook and  Schultz  had
completed 32, 16, 25, 23 and 16 years of credited service, respectively.

Employee Retention Agreements

Illinova  has  entered  into  Employee  Retention  Agreements  with  each of its
executive officers and with officers of its subsidiaries.  Under each agreement,
the officer  would be entitled to receive a lump sum cash  payment if his or her
employment were terminated  without good cause or voluntarily by the officer for
good  reason  within two years  following  a change in control of  Illinova  (as
defined  in the  Agreement)  or  terminated  prior to a change of control at the
request of a potential  acquirer.  The amount of the lump sum  payment  would be
equal to (1) 36 months'  salary at the greater of the  officer's  salary rate in
effect on the date the change in control  occurred  or the salary rate in effect
on the date the officer's  employment with Illinova  terminated;  plus (2) three
times the latest bonus  earned by the officer  during the three  calendar  years
preceding  termination  of employment.  Under the  agreement,  the officer would
continue,  after any such  termination  of  employment,  to  participate  in and
receive  benefits  under other  benefit plans of Illinova.  Such coverage  would
continue for 36 months  following  termination  of  employment,  or, if earlier,
until the officer reached age 65 or was employed by another  employer;  provided
that,  if the  officer  was  50  years  of age or  older  at the  time  of  such
termination,  then coverage  under health,  life  insurance and similar  welfare
plans would  continue until the officer became 55 years of age, at which time he
or she would be eligible to receive the  benefits  extended to the  employees of
Illinova who elect early retirement.
<PAGE>

Compensation and Nominating Committee 
Report on Officer Compensation

The seven-member Compensation and Nominating Committee of the Board of Directors
(the  "Committee") is composed  entirely of Outside  Directors.  The Committee's
role includes an assessment of Illinova's Compensation Strategy, a review of the
performance of the elected  officers and the  establishment  of specific officer
salaries subject to Board approval. The Committee establishes  performance goals
for the officers under the Compensation Plan, approves payments made pursuant to
the  Compensation  Plan and  recommends  grants  under the  Long-Term  Incentive
Compensation  Plan approved by the  shareholders  in 1992.  The  Committee  also
reviews other forms of compensation and benefits making  recommendations  to the
Board  on  changes  whenever  appropriate.   The  Committee  carries  out  these
responsibilities with assistance from an executive compensation  consulting firm
and with input  from the Chief  Executive  Officer  and  management  as it deems
appropriate.

Officer Compensation Philosophy

Illinova's  compensation philosophy reflects a commitment to compensate officers
competitively  with other  companies  while  rewarding  executives for achieving
levels of  operational  and  financial  excellence  consistent  with  continuous
improvement.  Illinova's  current  compensation  policy  is to  provide  a total
compensation  opportunity  targeted to the median of all utilities in the Edison
Electric  Institute (EEI) database.  All but one of the electric power companies
in the S&P Utilities Index are also in the EEI database. The S&P Utilities Index
is used to relate  Illinova's  shareholder  value in the  following  performance
graphs.  The S&P index covers the industry  broadly  including  electric and gas
utilities. After careful consideration,  the Committee has decided to maintain a
separate compensation peer group limited to electric or combination electric and
gas companies for reference purposes.  While the philosophy  described above was
used by Illinova in 1997 as an indicator of future utility pay practices, as the
industry  migrates toward  deregulation and  diversification,  it is anticipated
that the company will broaden its  competitive  reference  beyond the  regulated
utility industry in order to compete  sufficiently for talent in the deregulated
environment of the future.

     The  compensation  program for  officers  consists of base  salary,  annual
incentive and long-term  incentive  components.  The  combination of these three
elements  balances short- and long-term  business  performance  goals and aligns
officer   financial   rewards  with  those  of  Illinova's   shareholders.   The
compensation  program is  structured  so that,  depending  on the salary  level,
between 25 and 45 percent of an officer's total compensation  target is composed
of incentive compensation.

Base Salary Plan

The Committee  determines  base salary ranges for  executive  officers  based on
competitive  pay  practices  of  similarly  sized  utilities.  Officer  salaries
correspond to approximately the median of the companies in the compensation peer
group.  Individual  increases  are  based  on  several  factors,  including  the
officer's  performance during the year, the relationship of the officer's salary
to the market  salary  level for the position and  competitive  industry  salary
increase practices.

Annual Incentive Compensation Plan

Annual  incentive  awards are earned based on the achievement of specific annual
financial and  operational  goals by the Illinois Power officer group as a whole
and consideration of the officer's individual contribution. If payment is earned
under  this  Plan,  one-half  of the bonus is  payable  in cash  during the year
following the award year,  and one-half is credited to the  participants  in the
form of Common Stock units,  the number of which is  determined by dividing half
of the earned bonus amount by the closing  price of the Common Stock on the last
trading day of the award year.  The officer's  interest in the stock units vests
at the end of the three-year period, which begins the year after the award year.
The officer  receives this award in cash equal to (1) the closing stock price on
the first  trading day of the  distribution  year times the number of units held
plus (2)  dividend  equivalents  that would have been  received if the stock had
actually been issued.  Maximum awards under the plan may be up to 150 percent of
target; threshold awards are 50 percent of target.

     For Illinois Power officers,  1997 awards under the  Compensation  Plan are
based on  achievement in the  performance  areas:  earnings per share,  customer
satisfaction,  safety and employee  teamwork,  cost  management and  shareholder
value added. Up to 50 percent of the awarded amount is based on an assessment of
the individual officer's performance during the year.
<PAGE>

     Awards shown under Bonus in the Summary  Compensation Table for performance
during 1997 were based on achievement of officer's  individual goals.  There was
no payout for the identified performance areas.

     For the unregulated  subsidiaries,  Illinova Generating and Illinova Energy
Partners,  1997 officer awards were based on  achievement of specific  marketing
objectives and earnings objectives of the units. Up to 50 percent of the awarded
amount is based on an assessment of the individual officer's  performance during
the year.

Long-Term Incentive Compensation (LTIC) Plan

     Awards  under the LTIC plan are based on corporate  performance  as well as
individual  officer's  contributions  to  corporate  performance  subject to the
review of this Committee.  In 1997, it was determined that awards under the LTIC
plan be delivered in two components.  One-half of each officer's LTIC plan award
is  delivered in the form of stock  options  granted at fair market  value.  The
stock  options  granted to the  officers  for 1997  represent  an award based on
Illinova and individual performance as evaluated by the Chairman and reviewed by
the Committee.  The other half of the LTIC plan award is distributed to officers
in cash based upon Illinova's Shareholder Value-Added (SVA) performance relative
to a peer group of utility  companies,  as  measured in  overlapping  three-year
periods.  SVA measures  Illinova's return on the Company's weighted average cost
of  capital.  SVA  performance  at the median of the peer  group will  result in
target award levels. Performance above the median will result in payouts greater
than target to a maximum of two times target;  performance  significantly  below
the median results in no payouts.  Since 1996  represented the first year of the
SVA plan's first three-year  measurement cycle, no awards are due to be paid out
under the plan until 1999.

CEO Compensation

     Larry Haab became Chairman,  President, and Chief Executive Officer ("CEO")
of Illinois Power on June 12, 1991, and Chairman,  President and Chief Executive
Officer  of  Illinova  in  December   1993.   Illinova  based  Mr.  Haab's  1997
compensation on the policies and plans described above.

     The  Committee  invokes  the  active  participation  of all  non-management
directors in reviewing Mr. Haab's  performance  before it makes  recommendations
regarding his  compensation.  The Committee is responsible for administering the
processes for completing this review.  The process starts early in the year when
the Board of Directors  works with Mr. Haab to establish his personal  goals and
short- and  long-term  strategic  goals for Illinova.  At the  conclusion of the
year, Mr. Haab reviews his performance with the  non-management  directors.  The
Committee   oversees  this  review  and  recommends  to  the  Board  appropriate
adjustments  to  compensation.  In  setting  the  CEO's  salary  for  1997,  the
Committee,  with the participation of all Outside Directors  determined that Mr.
Haab had provided very strong leadership in promoting  electric  deregulation in
the State of Illinois.  The continuing outage at the Clinton Power Station was a
major  setback.  Significant  progress  was made in  advancing  other  strategic
objectives of the Company.

     The 1997 Annual Incentive  Compensation  Plan award for the Chief Executive
Officer was calculated consistent with the determination of awards for all other
Illinois Power officers.  Under the terms of the plan, one-half of the award was
paid in cash and one-half  was  converted to 1,539 stock units which vest over a
three-year period as described above.

     The  20,000  option  shares  granted  to the CEO  reflect  the  Committee's
recognition of this work in directing Illinova towards its long-term objectives.

Compensation and Nominating Committee

Ronald L. Thompson, Chairman
J. Joe Adorjan
C. Steven McMillan
Robert M. Powers
Walter D. Scott
Marilou von Ferstel
John D. Zeglis
<PAGE>

Stock Performance Graphs

The following performance graphs compare the cumulative total shareholder return
on Illinova's  Common Stock to the cumulative total return on the S&P 500 Index,
S&P MidCap 400 Index and S&P Utilities Index from (i) December 31, 1992, through
December 31, 1997, and (ii) December 31, 1994, through December 31, 1997.

Comparison of Five-Year Cumulative Total Return

Among Illinova, S&P 500, S&P Midcap 400, and S&P Utilities

     Assumes $100 invested on December 31, 1992, in Illinova  Common Stock,  S&P
500 Index, S&P MidCap 400 Index, and S&P Utilities Index.

     Fiscal year ended December 31.

Comparison of Three-Year Cumulative Total Return

Among Illinova, S&P 500, S&P Midcap 400, and S&P Utilities

     Assumes $100 invested on December 31, 1994, in Illinova  Common Stock,  S&P
500 Index, S&P MidCap 400 Index, and S&P Utilities Index.

     Fiscal year ended December 31.
<PAGE>

Independent Auditors

The  Board of  Directors  of  Illinova  has  selected  Price  Waterhouse  LLP as
independent  auditors for Illinova for 1998. A representative  of that firm will
be  present at the Annual  Meeting  and  available  to make a  statement  and to
respond to questions.

Other Matters

Illinova's 1997 Summary Annual Report to Shareholders was mailed to shareholders
commencing  on or about March 10, 1998.  Copies of  Illinova's  Annual Report on
Form  10-K  will be  available  to  shareholders,  after  its  filing  with  the
Securities and Exchange  Commission on or before March 31, 1998. Requests should
be addressed to Investor Relations,  G-21, Illinova Corporation,  500 South 27th
Street, Decatur, Illinois 62525-1805.

     Any proposal by a  shareholder  to be presented at the next Annual  Meeting
must be received at  Illinova's  executive  offices not later than  November 12,
1998.

Other Business

Management does not know of any matter which will be presented for consideration
at the Annual  Meeting  other than the  matters  described  in the  accompanying
Notice of Annual Meeting.

By Order of the Board of Directors,

Leah Manning Stetzner,
General Counsel and Corporate Secretary

Decatur, Illinois
March 10, 1998
<PAGE>

APPENDIX: 1997 ANNUAL REPORT TO SHAREHOLDERS

Table of Contents

Management's Discussion and Analysis                   a-2

Responsibility for Information                        a-10

Report of Independent Accountants                     a-10

Consolidated Statements of Income                     a-11

Consolidated Balance Sheets                           a-12

Consolidated Statements of Cash Flows                 a-13

Consolidated Statements of Retained Earnings          a-13

Notes to Consolidated Financial Statements            a-14

Selected Consolidated Financial Data                  a-32

Selected Illinois Power Company Statistics            a-33

Abbreviations Used Throughout this Report

AFUDC            Allowance for Funds Used
                 During Construction

Baldwin          Baldwin Power Station

Clinton          Clinton Power Station

DOE              Department of Energy

EITF             Emerging Issues Task Force of the
                 Financial Accounting Standards Board

EMF              Electric and Magnetic Fields

EPS              Earnings Per Share

ESOP             Employees' Stock Ownership Plan

FAS              Statement of Financial
                 Accounting Standards

FASB             Financial Accounting Standards Board

FERC             Federal Energy Regulatory Commission

Fuel Company     Illinois Power Fuel Company

HB 362           House Bill 362, An Act in Relation
                 to the Competitive Provision of
                 Utility Services

ICC              Illinois Commerce Commission

IEP              Illinova Energy Partners, Inc.

IGC              Illinova Generating Company

IIC              Illinova Insurance Company

Illinova         Illinova Corporation

IP               Illinois Power Company

IPFI             Illinois Power Financing I

IPMI             Illinova Power Marketing, Inc.

ISA              Integrated Safety Assessment

kw               Kilowatt

kwh              Kilowatt-Hour

MGP              Manufactured-Gas Plant

MIPS             Monthly Income Preferred Securities

MW               Megawatt

MWH              Megawatt-Hour

NOPR             Notice of Proposed Rulemaking

NOx              Nitrogen Oxide

NRC              Nuclear Regulatory Commission

PCA              Power Coordination Agreement

PECO             PECO Energy Company

S&P              Standard & Poor's

SO2              Sulfur Dioxide

Soyland          Soyland Power Cooperative, Inc.

TOPrS            Trust Originated Preferred Securities

UFAC             Uniform Fuel Adjustment Clause

UGAC             Uniform Gas Adjustment Clause

U.S. EPA         United States Environmental
                 Protection Agency

Vermilion         Vermilion Power Station

Wood River        Wood River Power Station
<PAGE>

MANAGEMENT'S DISCUSSION AND ANALYSIS

In this report, we refer to the Consolidated Financial Statements, related Notes
to Consolidated  Financial Statements,  Selected Consolidated Financial Data and
Selected   Illinois  Power  Company   Statistics  for   information   concerning
consolidated financial position and results of operations.  This report contains
estimates,  projections and other forward-looking  statements that involve risks
and  uncertainties.  Actual  results or outcomes  could differ  materially  as a
result of such important factors as: the outcome of state and federal regulatory
proceedings  affecting  the  restructuring  of  the  electric  and  gas  utility
industries;  the impacts  new laws and  regulations  relating to  restructuring,
environmental,  and other  matters  have on Illinova and its  subsidiaries;  the
effects of increased competition on the utility businesses;  risks of owning and
operating  a  nuclear  facility;  changes  in prices  and cost of fuel;  factors
affecting non-utility investments, such as the risk of doing business in foreign
countries;  construction  and operation risks; and increases in financing costs.
Below is discussion of the factors  having  significant  impact on  consolidated
financial position and results of operations since January 1, 1995.

Illinova Subsidiaries

The  Consolidated   Financial   Statements  include  the  accounts  of  Illinova
Corporation,  a holding company;  Illinois Power Company, a combination electric
and gas utility;  Illinova Generating  Company,  which invests in energy-related
projects  throughout the world;  Illinova Energy Partners,  Inc., which develops
and markets energy-related services throughout the United States and Canada; and
Illinova  Insurance  Company,  whose  purpose  is to  insure  the  risks  of the
subsidiaries  of Illinova and risks related to or associated with their business
enterprises.  On February 12, 1997, the Illinova  Board of Directors  approved a
merger of Illinova Energy  Partners,  Inc. and Illinova Power  Marketing,  Inc.,
another Illinova subsidiary.  In the merger, Illinova Power Marketing,  Inc. was
the  surviving  entity but changed its name to Illinova  Energy  Partners,  Inc.
Illinova Generating Company and Illinova Energy Partners,  Inc. are wholly owned
subsidiaries of Illinova.  Illinois Power has preferred shares outstanding,  but
its  common  stock  is  wholly  owned  by  Illinova.  See  "Note  2  -  Illinova
Subsidiaries" for additional information.

Open Access and Wheeling

On March 29, 1995,  the FERC issued a NOPR  initiating  the process of mandating
non-discriminatory  open access to public  utility  transmission  facilities  at
cost-based rates. Transmission of electricity for a reseller or redistributor of
energy is called  wholesale  wheeling.  Transmission  of electricity for end-use
customers is known as retail wheeling.

     On April 24, 1996,  FERC issued  Orders 888 and 889 which  established  the
Final Rule resulting  from the NOPR.  The Orders became  effective July 9, 1996.
The  Rule  requires  all  public  utilities  under  FERC  jurisdiction  that own
transmission  facilities to file  transmission  service tariffs that comply with
Pro Forma Tariffs attached to the Orders.  FERC also requires that all wholesale
sales  made by a  utility  provide  for  transmission  of the  power  under  the
prescribed terms and conditions. IP made a compliance filing as required on July
9, 1996, which has been accepted by FERC.

     Public  utilities  serving  customers at retail are not  required,  at this
time, to use  FERC-mandated  terms and conditions.  FERC does not require public
utilities  to give retail  customers  access to  alternate  energy  suppliers or
direct transmission service.

     The  move  to  open  access  transmission   service  likely  will  increase
competition in the wholesale  energy  market,  but this alone is not expected to
have a significant financial impact.

Competition

On December 16, 1997,  Illinois  Governor  Edgar  signed  electric  deregulation
legislation.  HB 362 guarantees IP's residential customers a 15 percent decrease
in base electric  rates  beginning  August 1, 1998,  and an additional 5 percent
decrease  effective on May 1, 2002. The rate decreases are expected to result in
revenue  reductions  of  approximately  $40 million in 1998,  approximately  $80
million in each of the years 1999 through 2001 and approximately $100 million in
2002, based on current consumption. Customers with demand greater than 4 MW at a
single site will be free to choose their electric  generation  supplier ("direct
access") starting October 1999. Customers with at least 10 sites which aggregate
at least 9.5 MW in total demand also will have 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.

     Although the specified  residential rate reductions and the introduction of
direct access will lead to lower electric service  revenues,  HB 362 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,  adjusted to deduct: 1) delivery
     charges the utility will continue to receive from the customer,  and 2) the
     market  value of the  freed-up  energy net of a  mitigation  factor  (i.e.,
     percentage  reduction of the  transition  charge  amount).  The  mitigation
     factor is designed to provide  incentive  for  management  to continue cost
     reduction efforts and generate new sources of revenue;
<PAGE>

2)   Utilities are provided the opportunity to lower their financing and capital
     costs through the issuance of "securitized" bonds; 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.

     The extent to which revenues are lowered 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.  The impact on net income
will  depend on,  among  other  things,  the amount of  revenues  earned and the
ongoing costs of doing business.

     In 1996, IP received approval from both the ICC and FERC to conduct an open
access  experiment  beginning  in 1996 and  ending on  December  31,  1999.  The
experiment  allows  certain  industrial  customers to purchase  electricity  and
related services from other sources.  Currently,  17 customers are participating
in the experiment. Since its inception, the experiment has cost IP approximately
$11.2  million in lost revenue net of avoided  fuel cost and variable  operating
expenses.  This loss was  partially  offset by selling  the  surplus  energy and
capacity on the open market and by $2.7 million in transmission service charges.

Accounting Matters

Prior  to  the  passage  of HB  362,  IP  prepared  its  consolidated  financial
statements in  accordance  with FAS 71,  "Accounting  for the Effects of Certain
Types of  Regulation."  Reporting  under FAS 71 allows  companies  whose service
obligations  and prices are regulated to maintain on their balance sheets assets
representing  costs they expect to recover from customers,  through inclusion of
such  costs in their  future  rates.  In July  1997,  the  EITF  concluded  that
application of FAS 71 accounting should be discontinued at the date of enactment
of  deregulation   legislation  for  business  segments  for  which  a  plan  of
deregulation has been  established.  The EITF further  concluded that regulatory
assets and  liabilities  that  originated  in the portion of the business  being
deregulated should be written off unless their recovery is specifically provided
for through future cash flows from the regulated portion of the business.

     Because HB 362 provides  for  market-based  pricing of electric  generation
services,  IP discontinued  application of FAS 71 for its generating segment. IP
evaluated its regulatory  assets and liabilities  associated with its generation
segment and  determined  that  recovery of these costs was not probable  through
rates charged to transmission and distribution customers,  the regulated portion
of the business.

     IP wrote  off  generation-related  regulatory  assets  and  liabilities  of
approximately  $195 million (net of income  taxes) in December  1997.  These net
assets  related to previously  incurred costs that were expected to be collected
through  future  revenues,  including  deferred  costs for Clinton,  unamortized
losses on reacquired debt, recoverable income taxes and other generation-related
regulatory  assets.  At December 31, 1997,  IP's net  investment  in  generation
facilities  was $3.5 billion and was  reflected in "Utility  Plant,  at Original
Cost" on IP's balance sheet.

     In addition,  IP evaluated  its  generation  segment plant  investments  to
determine if they had been impaired as defined in FAS 121,  "Accounting  for the
Impairment of Long-Lived  Assets and Long-Lived  Assets to Be Disposed Of." This
evaluation  determined  that future  revenues  were expected to be sufficient to
recover the costs of its generation  segment plant  investments and as a result,
no plant  write-downs were necessary.  However,  ultimate  recovery depends on a
number of factors and variables  including market conditions and IP's ability to
operate its generation assets efficiently.

     The  provisions  of HB 362 allow an  acceleration  in the rate at which any
utility-owned  assets are expensed  without  regulatory  approval  provided such
charges are consistent with generally accepted accounting principles. Under this
legislation,  up to an aggregate of $1.5 billion in  additional  expense for the
generation-related  assets  could be  accelerated  through  the year 2008.  This
reduction in the net book value of IP's  generation-  related assets should help
position IP to operate  competitively  and  profitably in the changing  business
environment.  This accelerated charge would have a direct impact on earnings but
not on cash flows.

     The FASB  continues to review the  accounting  for  liabilities  related to
closure and removal of long-lived assets, including decommissioning. See "Note 4
- - Commitments and Contingencies" for a discussion of decommissioning.

     See "Note 1 - Summary of Significant  Accounting Policies" for a discussion
of other accounting issues.

Regulatory Matters

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 and again in June 1997,  the NRC named Clinton among plants
having a trend of declining  performance.  In June 1997, IP committed to conduct
an ISA to thoroughly  assess Clinton's  performance.  The ISA was conducted by a
team of 30  individuals  with  extensive  nuclear  experience and no substantial
previous  involvement  at Clinton.  Their report  concluded  that the underlying
reasons for the  performance  problems at Clinton  were  ineffective  leadership
throughout the  organization in providing  standards of excellence,  complacency
throughout the organization,  barrier weaknesses and weaknesses in teamwork.  In
late October, a team commissioned by the NRC performed an evaluation to validate
the ISA results.  In December,  this team concluded that the findings of the ISA
accurately characterized Clinton's performance deficiencies and their causes.
<PAGE>

     On January 5, 1998,  IP and PECO  announced an  agreement  under which PECO
will provide  management  services  for Clinton.  Although a PECO team will help
manage the plant, IP will continue to maintain the operating license for Clinton
and retain  ultimate  oversight of the plant.  PECO employees will assume senior
positions  at  Clinton,  but the  plant  will  remain  primarily  staffed  by IP
employees.  IP made this  decision  based on a belief  that  bringing  in PECO's
experienced  management team would be the most efficient way to get Clinton back
on line and operating at a superior level as quickly as possible.

     On January 21,  1998,  the NRC placed  Clinton on its Watch List of nuclear
plants  that  require  additional  regulatory  oversight  because  of  declining
performance.  Twice a year the NRC  evaluates the  performance  of nuclear power
plants in the United  States  and  identifies  those  which  require  additional
regulatory  oversight.  Once  placed on the Watch List a plant must  demonstrate
consistent improved performance before it is removed from the list. The NRC will
monitor Clinton more closely than plants not on the Watch List. This may include
increased inspections, additional required documentation,  NRC-required approval
of processes and procedures, and higher-level NRC oversight.

     The NRC has advised IP that it must  submit a written  report to the NRC at
least two weeks  prior to  restarting  Clinton,  giving  the  agency  reasonable
assurance  that IP's actions to correct  recurring  weaknesses in the corrective
action program have been effective. After the report is submitted, the NRC staff
plans to meet with IP's management to discuss the plant's readiness for restart.

     In March  1997,  the NRC issued an order  approving  transfer  to IP of the
Clinton  operating  license related to Soyland's 13.2% ownership, in connection
with the transfer  from  Soyland to IP of all of Soyland's  interest in Clinton.
Soyland's  title to the plant and directly  related  assets such as nuclear fuel
was  transferred  to IP in May 1997.  Soyland's  nuclear  decommissioning  trust
assets were  transferred to IP in May 1997,  consistent  with IP's assumption of
all  of   Soyland's   ownership   obligations   including   those   related   to
decommissioning.

     The FERC  approved an amended PCA between IP and Soyland in July 1997.  The
amended PCA  obligates  Soyland to purchase all of its capacity and energy needs
from IP for at  least  10  years.  The  amended  PCA  provides  that a  contract
cancellation  fee will be paid by  Soyland  to IP in the  event  that a  Soyland
Cooperative  member  terminates  its membership  from Soyland.  On May 31, 1997,
three distribution  cooperative  members terminated  membership by buying out of
their long-term wholesale power contracts with Soyland.  This action resulted in
Soyland  paying a fee of $20.8  million  to IP in June 1997 to  reduce  its base
capacity charges.  Fee proceeds of $2.9 million were used to offset the costs of
acquiring  Soyland's share of Clinton with the remaining $17.9 million  recorded
as interchange  revenue.  In December 1997, Soyland signed a letter of intent to
pay in advance the remainder of its base capacity charges in the PCA. The fee of
approximately $70 million will be deferred and recognized as interchange revenue
over the initial term of the PCA. The payment is contingent on Soyland obtaining
the necessary financing and regulatory approvals in 1998.

     In September 1997, the ICC approved a petition filed by IP which stipulates
customers will not be charged for certain additional costs of energy incurred as
a result of Clinton being out of service.  IP did not collect from its customers
$36.3 million for higher-cost replacement power in 1997. IP will forego recovery
of additional  fuel costs as the Clinton outage  continues into 1998.  Under the
petition,  fuel costs charged to customers will be no higher than average 1995 -
1996  levels  until  Clinton  is back in  service  operating  at  least at a 65%
capacity factor for two consecutive months.

     Under HB 362, IP may choose to eliminate application of the UFAC. IP's base
rates will still  include a component  for some level of recovery of fuel costs,
but IP  would  not be able to pass  through  to  customers  increased  costs  of
purchasing fuel,  emission  allowances,  or replacement power. On elimination of
the UFAC,  base rates will include a fixed  fuel-cost  factor  equivalent to the
average 1995 - 1996 fuel cost levels. Future recovery of fuel costs is uncertain
as IP will decrease  base  electric  rates to  residential  customers  beginning
August  1998  and  certain  customers  will  be free to  choose  their  electric
generation  supplier  beginning in October 1999.  The extent to which fuel costs
are  recovered  will depend on a number of factors  including  the future market
prices for wholesale and retail  energy,  when Clinton  returns to service,  and
whether IP elects to eliminate the UFAC.

Year 2000

In  November  1996,   Illinova   deployed  a  project  team  to  coordinate  the
identification,  evaluation,  and  implementation of changes to computer systems
and applications necessary to achieve a year 2000 date conversion with no effect
on customers or disruption to business operations.

     These  actions are necessary to ensure that systems and  applications  will
recognize  and  process  coding  for the year 2000 and  beyond.  Major  areas of
potential  business impact have been identified and initial  conversion  efforts
are  underway.  Illinova also is  communicating  with third parties with whom it
does business to ensure  continued  business  operations.  The cost of achieving
year 2000 compliance is estimated to be at least $14 million through 1999.

     Contingency  plans for operating without year 2000 compliance have not been
developed.  Such  activity  will  depend  on  assessment  of  progress.  Project
completion is planned for the fourth quarter of 1999.
<PAGE>

Enhanced Retirement

In December  1994, IP announced  plans for  voluntary  enhanced  retirement  and
severance  programs.  During the fourth quarter of 1995, 727 employees  accepted
enhanced  retirement or severance  under these programs.  The combined  enhanced
retirement  and  severance  programs  generated  a pretax  charge of $38 million
against fourth quarter 1995 earnings.

Consolidated Results of Operations

Overview

Earnings  (loss)  applicable to common stock were $(90)  million for 1997,  $190
million for 1996, and $148 million for 1995.  Basic and diluted  earnings (loss)
per common  share were  $(1.22) for 1997 ($1.41  before the  extraordinary  item
related to discontinued application of FAS 71 for the generation segment), $2.51
for 1996,  and $1.96 for 1995 ($2.26  before the one-time  charge of $38 million
for enhanced  retirement and severance).  The decrease in 1997 earnings compared
to 1996 was due  primarily to the  extraordinary  item  related to  discontinued
application  of  FAS  71  for  the  generation  segment,  higher  operation  and
maintenance expenses due to Clinton, higher power purchased costs due to Clinton
and Wood River  outages,  IEP losses and an increase in  uncollectible  accounts
expense.  The increase in 1996 earnings per share over 1995 was due primarily to
the one-time charge in 1995 for the enhanced  retirement and severance programs,
lower  operations  expense due to the  employment  decrease and lower  financing
costs. The 1995 basic and diluted  earnings per share include $(.30)  net-of-tax
for the enhanced  retirement  and severance  program and $(.05) for the carrying
amount  under  consideration  paid for IP preferred  stock  redeemed in December
1995.

     Regulators  historically  have determined IP's rates for electric  service,
the ICC at the  retail  level  and  the  FERC at the  wholesale  level.  The ICC
determines IP's rates for gas service. These rates have been designed to recover
the cost of service and allow  shareholders  the opportunity to earn a fair rate
of  return.   As  described  under   "Competition"   above,   Illinois  electric
deregulation  legislation  phases  in a  competitive  marketplace  for  electric
generation while maintaining cost-based regulation for electric delivery service
and gas service,  protecting  the financial  integrity of the company during the
transition period. Future electric and natural gas sales,  including interchange
sales, will continue to be affected by an increasingly  competitive marketplace,
changes in the regulatory  environment,  increased  transmission access, weather
conditions,   competing  fuel  sources,  interchange  market  conditions,  plant
availability,  fuel  cost  recoveries,  customer  conservation  efforts  and the
overall economy.

Illinova and Illinois Power - Results of Operations

Electric Operations For the years 1995 through 1997, electric revenues including
interchange  increased  3.7% and the gross  electric  margin  decreased  6.4% as
follows:

(Millions of dollars)               1997             1996              1995

Electric revenues                $ 1,244.4      $  1,202.9         $  1,252.6
Interchange revenues                 175.6           137.6              116.3
Fuel cost & power
  purchased                         (450.3)         (313.3)            (333.4)
  Electric margin                $   969.7      $  1,027.2         $  1,035.5



The components of annual changes in electric revenues were:

(Millions of dollars)               1997             1996              1995

Price                            $ (11.5)        $  (7.2)           $  13.3
Volume and other                     9.7             6.4               42.7
Fuel cost recoveries                43.3           (48.9)              19.1

  Revenue increase
    (decrease)                   $  41.5         $ (49.7)           $  75.1



1997 Electric revenues excluding interchange sales increased 3.4%, primarily due
to an increase  in  revenues  under the UFAC and  increased  wheeling  revenues.
Interchange  revenues  increased 27.6% due to the receipt of an opt-out fee from
Soyland per the amended PCA and increased interchange activity.  Electric margin
decreased  primarily  due to  increased  power  purchased  costs as a result  of
outages at the nuclear and fossil facilities.
<PAGE>

1996 Electric revenues excluding interchange sales decreased 4.0%, primarily due
to reduction in revenues  under the UFAC.  Volume changes by customer class were
insignificant,  as kwh sales to ultimate consumers (excluding  interchange sales
and wheeling) decreased .3%. Interchange revenues increased 18.3% as a result of
higher plant availability in the first half of the year.

1995 The 6.4% increase in electric revenues was primarily due to a 1.9% increase
in kwh sales to ultimate consumers  (excluding  interchange sales and wheeling).
Volume  increases  resulted  from  higher  residential  sales  (4.8%) and higher
commercial  sales  (8.2%)  due  to  an  improving   economy  and  warmer  summer
temperatures  compared to 1994.  Industrial sales remained essentially unchanged
from 1994.  Interchange  revenues  increased  $6.3 million (5.8%) as a result of
increased sales opportunities.

     The cost of meeting IP's system  requirements  was  reflected in fuel costs
for  electric  plants and power  purchased.  Changes in these costs are detailed
below: 

(Millions of dollars)               1997             1996              1995

Fuel for electric plants
  Volume and other             $   (37.7)         $   15.4          $    9.8
  Price                             (8.5)            (12.0)            (35.5)
  Emission allowances               12.3                .8              18.5
  Fuel cost recoveries              18.2             (30.0)             14.5

                                   (15.7)            (25.8)              7.3

Power purchased                    152.7               5.7               6.9
  Total increase (decrease)    $   137.0          $  (20.1)         $   14.2

Weighted average system
  generating fuel cost
  ($/MWH)                      $   12.06         $   11.01         $   11.41



     System  load  requirements,  generating  unit  availability,  fuel  prices,
purchased power prices, resale of energy to other utilities,  emission allowance
costs and fuel cost recovery through UFAC caused changes in these costs.

     Changes in factors  affecting the cost of fuel for electric  generation are
below:


                           1997             1996              1995

Increase (decrease)
  in generation           (25.4)%            5.4%               .7%

Generation mix
  Coal and other             100%             78%               73%
  Nuclear                      0%             22%               27%



1997 The cost of fuel decreased 6.3% and electric  generation  decreased  25.4%.
The decrease in fuel cost was primarily attributable to decreased generation and
a favorable  price variance.  These factors were partially  offset by effects of
the UFAC and increased  emission  allowance  costs.  Power  purchased  increased
$152.7 million primarily due to Clinton and Wood River being out of service.

1996 The cost of fuel decreased 9.4% and electric generation increased 5.4%. The
decrease in fuel cost was primarily  attributable to the effects of the UFAC, as
well as a favorable  price variance.  These factors were partially  offset by an
increase  in fuel  cost  due to the  increase  in  generation.  Power  purchased
increased $5.7 million  primarily due to the extended Clinton outage.  Clinton's
equivalent  availability  and  generation  were  lower  than in 1995 due to that
outage.

1995 The cost of fuel increased 2.8% and electric generation  increased .7%. The
increase in fuel cost was  attributable to the effects of the UFAC, the increase
in higher-cost fossil generation and the cost of emission allowances.  Clinton's
equivalent  availability  and generation  were lower in 1995 as compared to 1994
due to the  scheduled  refueling and  maintenance  outage.  Clinton  returned to
service April 29, 1995,  after  completing its fifth  refueling and  maintenance
outage, which began March 12, 1995. Power purchased increased $6.9 million.

Gas  Operations  For  the  years  1995  through  1997,  gas  revenues  including
transportation increased 29.9%, while the gross margin on gas revenues increased
9.3% as follows:

(Millions of dollars)                      1997           1996           1995

Gas revenues                          $   345.2       $   341.4      $   264.5
Gas cost                                 (207.7)         (202.6)        (138.8)
Transportation revenues                     8.7             6.8            8.0

   Gas margin                         $   146.2       $   145.6      $   133.7

(Millions of therms)
Therms sold                               537             703            588
Therms transported                        309             251            273

   Total consumption                      846             954            861




Changes in the cost of gas purchased for resale were:

(Millions of dollars)                       1997          1996        1995

Gas purchased for resale
  Cost                                 $     8.0     $    49.0    $   (43.5)
  Volume                                   (30.0)          8.5         25.3
  Gas cost recoveries                       27.1           6.3        (15.4)

  Total increase (decrease)            $     5.1     $    63.8    $   (33.6)

Average cost per therm
  delivered                            $      .28    $      .267  $      .201

<PAGE>

     The 1997  increase  in gas costs was due to  slightly  higher  prices  from
suppliers  and  effects of the UGAC,  offset by a decrease  in volume.  The 1996
increase in gas costs was primarily due to higher prices from  suppliers and the
effects of the UGAC.  The 1995  decrease in the cost of gas purchased was due to
lower gas prices  caused by  unusually  warm  winter  weather  nationwide.  Also
contributing to the higher gas margins in 1995 was the 6.1% increase in gas base
rates approved by the ICC in April 1994.

Diversified  Enterprises Due primarily to increased power sales activity at IEP,
diversified  enterprises  revenues  increased  $678  million for 1997.  However,
diversified  enterprises expenses increased $705 million,  offsetting the growth
in revenues.  Diversified expenses primarily reflect the cost of power purchased
for resale.

Other  Expenses A  comparison  of  significant  increases  (decreases)  in other
operating  expenses,  maintenance and  depreciation  for the last three years is
presented in the following table:

(Millions of dollars)                       1997          1996           1995

Other operating expenses               $    40.6     $    (9.8)     $     (.3)
Maintenance                                 12.0           (.3)          10.4
Depreciation and
  amortization                               8.8           3.5            7.2


     The increase in operating  and  maintenance  expenses for 1997 is primarily
due to increased  company and contractor labor at the nuclear and fossil plants.
An increase in uncollectible  accounts expense and disposal of surplus inventory
also contributed to the increase.

     The decrease in operating expenses for 1996 is due primarily to the savings
from the enhanced  retirement  and severance  program,  partially  offset by the
costs of the extended  Clinton  outage and  increased  amortization  of MGP site
expenses.  The ICC  approved  tariff  riders in March 1996 that  resulted in the
current  recognition of MGP site remediation  costs in operating  expenses.  The
1996  increase  amounted to $5.5  million.  This increase is offset by increased
revenues collected under the riders.

     The  increase in  maintenance  expenses  for 1995 is  primarily  due to the
refueling and maintenance  outage at Clinton.  The increases in depreciation and
amortization  for each of the three years were due to increases in utility plant
balances.

Miscellaneous  - Net The 1997  decrease  of $5.1  million  in  Miscellaneous-net
deductions  is  due  primarily  to  1996  accruals   recorded  for  the  planned
disposition  of  property.   The  1996  and  1995  change  in  Miscellaneous-net
deductions was negligible.

Equity  Earnings in  Affiliates  The increase of $11.1  million in 1997 and $3.7
million in 1996 in equity  earnings in  affiliates is primarily due to increased
earnings from IGC investments.

Interest Charges Total interest charges,  including AFUDC and preferred dividend
requirements,  increased $2.8 million in 1997,  decreased $15.8 million in 1996,
and increased $2.4 million in 1995. The 1997 increase is primarily due to higher
Illinova  debt  expenses,  increased IP short-term  borrowings  and lower AFUDC,
partially  offset  by the  continued  benefits  of IP  refinancing  efforts  and
capitalization  reductions.  The  1996  decrease  was  due to  lower  short-term
interest  rates and the  impact of IP  refinancing  efforts  and  capitalization
reduction  during  1996.  The  1995  increase  was due to  increased  short-term
borrowings at higher interest rates.

Inflation  Inflation,  as measured by the Consumer Price Index,  was 2.3%, 3.3%,
and 2.5% in 1997, 1996, and 1995,  respectively.  IP recovers  historical rather
than current plant costs in its regulated rates.

Liquidity and Capital Resources

Dividends

On December 10, 1997,  Illinova  declared the quarterly common stock dividend at
$.31 per share payable February 1, 1998, to stockholders of record as of January
9, 1998. On December 11, 1996,  Illinova  increased  the quarterly  common stock
dividend by 11%  declaring  the common stock  dividend for the first  quarter of
1997 at $.31 per share. On December 13, 1995,  Illinova  increased the quarterly
common stock  dividend 12%,  declaring  the common stock  dividend for the first
quarter of 1996 at $.28 per share.
<PAGE>

Capital Resources and Requirements

Illinova  and IP  need  cash  for  operating  expenses,  interest  and  dividend
payments, debt and certain IP preferred stock retirements, construction programs
and non-regulated subsidiary funding requirements. To meet these needs, Illinova
and IP have used internally generated funds and external  financings,  including
the  issuance of debt and  revolving  lines of credit.  The timing and amount of
external   financings   depend   primarily  on  economic  and  financial  market
conditions, cash needs and capitalization ratio objectives.

     IP cash flows from  operations  during  1997  provided  sufficient  working
capital to meet ongoing operating  requirements,  to service existing common and
IP  preferred  stock  dividends  and debt  requirements  and to meet all of IP's
construction requirements. Additionally, Illinova expects that future cash flows
and  external  financings  will  enable it to meet  operating  requirements  and
continue to service  IP's and  Illinova's  existing  debt,  IP's  preferred  and
Illinova's  common stock  dividends,  IP's sinking fund  requirements and all of
IP's anticipated construction requirements.  Continued sufficiency of cash flows
for these purposes will depend on a number of factors and  variables,  including
market conditions, business expenses and the ability to compete.

     To a significant  degree,  the availability and cost of external  financing
depend on the  financial  health of the company  seeking  those funds.  Security
ratings are an indication of a company's  financial  position and may affect the
cost of securities,  as well as the  willingness of investors to invest in these
securities.  The current  ratings of  Illinova's  and IP's  securities  by three
principal securities rating agencies are as follows:


                                                     Standard        Duff &
                                           Moody's   & Poor's        Phelps

Illinova long-term debt                     Baa3         BBB-          -
IP first/new mortgage bonds                 Baa1         BBB          BBB+
IP preferred stock                          baa2         BBB-         BBB-
IP commercial paper                         P-2          A-2          D-2


     Under current market conditions, these ratings would afford Illinova and IP
the ability to issue additional securities through external financing.  Illinova
and IP have adequate short-term and intermediate-term bank borrowing capacity.

     Based on its 1993  revised  standards  for review of utility  business  and
financial  risks,  S&P placed  IP,  along with  approximately  one-third  of the
industry,  in a "somewhat  below average"  category.  In April 1994, S&P lowered
IP's  mortgage  bond rating to BBB from BBB+.  In August  1995,  S&P revised its
ratings outlook from stable to positive.  In February 1996, Moody's also revised
its ratings outlook from stable to positive.

     Moody's  upgraded IP's  securities on July 1, 1996. The rating for mortgage
bonds was raised from Baa2 to Baa1, while preferred stock ratings went from baa3
to baa2.  Duff & Phelps has  indicated  that it expects  IP's  ratings to remain
stable,  reflecting a modestly strengthening  financial profile characterized by
good cash flow and an average  business risk profile.  Illinova did not petition
Duff & Phelps for a rating of its long-term debt.

     For the years 1997, 1996 and 1995,  changes in long-term debt, IP preferred
stock and Illinova common stock  outstanding,  including  normal  maturities and
elective redemptions, were as follows:


(Millions of dollars)                   1997     1996       1995

Illinova long-term debt               $ 100    $    -     $    -
IP long-term debt                       (11)     (154)       (5)
Preferred stock                         (39)       71      (135)
Common stock                            (90)        -         -

  Total decrease                      $ (40)    $ (83)    $(140)



     The  amounts  shown in the  preceding  table  for debt  retirements  do not
include all  mortgage  sinking fund  requirements.  IP has  generally  met these
requirements  by  pledging  property  additions  as  permitted  under  IP's 1943
Mortgage  and  Deed  of  Trust  and  the  1992  New  Mortgage.   For  additional
information,  see "Note 9 - Long-Term  Debt"  and "Note 10 - Preferred  Stock of
Subsidiary."

     During 1997, IP redeemed  $34.9 million (all of the  remaining)  Adjustable
Rate Series A serial  preferred  stock. IP also redeemed $4.2 million of various
issues of serial  preferred  stock.  In addition,  $10.5 million of  medium-term
notes  matured  and were  retired.  During  the year IP issued  $150  million of
Adjustable Rate Pollution Control Revenue Bonds, due April 1, 2032. The proceeds
were used on June 2,  1997,  to retire  $150  million  of IP's 7 5/8%  Pollution
Control First Mortgage Bonds due 2016.

     In January 1997, a $300 million shelf  registration  statement for Illinova
debt  securities  became  effective.  On February 5, 1997,  Illinova issued $100
million of 7 1/8% Senior Notes due 2004.  The  proceeds  were used to redeem $77
million of  short-term  borrowings,  and to invest in  Illinova's  non-regulated
subsidiaries. On January 28, 1998, Illinova issued (under its $300 million shelf
registration  statement) $40 million of 6.46%  medium-term  notes due October 1,
2002. During 1997, Illinova  repurchased four million shares of its common stock
through an open market program.
<PAGE>

     During 1996, IP redeemed  $2.2 million of  Adjustable  Rate Series A serial
preferred stock,  $20.5 million (all of the remaining)  Adjustable Rate Series B
serial preferred stock and $6.7 million of 7.75% serial preferred stock.  During
the year, IP also retired $62.9 million of 8.75% First  Mortgage Bonds due 2021,
$6  million  of 8% New  Mortgage  Bonds  due  2023 and $23  million  of 7.5% New
Mortgage  Bonds due 2025.  The $40 million of 5.85% First Mortgage Bonds matured
and were retired.  In addition,  $21.5 million of medium-term  notes matured and
were retired.

     In February 1995, IP redeemed $12 million of 8.00%  mandatorily  redeemable
serial  preferred  stock.  In May 1995, IP redeemed the remaining $24 million of
8.00% mandatorily  redeemable serial preferred stock. In March 1995, IP redeemed
$.2  million of 7.56%  serial  preferred  stock and $3  million of 8.24%  serial
preferred  stock. In August 1995, IP redeemed $5 million of 8.75% First Mortgage
Bonds.  In December  1995, IP redeemed  $34.7 million of 8.00% serial  preferred
stock,  $33.6 million of 7.56% serial  preferred  stock and $27 million of 8.24%
serial preferred stock.

     IPFI is a  statutory  business  trust in which IP serves as  sponsor.  IPFI
issued $100 million of TOPrS at 8% (4.8%  after-tax  rate) in January 1996.  The
TOPrS were issued by IPFI,  which invested the proceeds in an equivalent  amount
of IP subordinated debentures due in 2045. The proceeds were used by IP to repay
short-term indebtedness on varying dates on or before March 1, 1996. IP incurred
the indebtedness in December 1995 to redeem $95.3 million  (principal  value) of
higher-cost outstanding preferred stock of IP.

     In 1992,  IP  executed a general  obligation  mortgage  (New  Mortgage)  to
replace, over time, IP's 1943 Mortgage and Deed of Trust (First Mortgage).  Both
mortgages  are  secured  by liens on  substantially  all of IP's  properties.  A
corresponding  issue of First Mortgage bonds, under the First Mortgage,  secures
any  bonds  issued  under  the New  Mortgage.  In  October  1997,  at a  special
bondholders  meeting,  the 1943  First  Mortgage  was  amended  to be  generally
consistent  with the New Mortgage.  The New Mortgage  provides IP with increased
financial flexibility.

     At December 31, 1997, based on the most restrictive earnings test contained
in the New Mortgage, IP could issue approximately $800 million of additional New
Mortgage bonds for other than refunding purposes. Also at December 31, 1997, the
unused  portion of Illinova and IP total bank lines of credit was $465  million.
The amount of available IP unsecured  borrowing capacity totaled $168 million at
December 31, 1997.

     On February  12, 1997,  the IP Board of Directors  approved a change to the
Articles of  Incorporation  to remove the  limitation on the amount of unsecured
debt  that  IP  can  issue.  The  change  will  be  voted  on by  the  preferred
stockholders at a special meeting planned to be held in 1998.

     Under HB 362, IP may issue transitional  funding  instruments for up to 25%
of its  December  31, 1996,  capitalization  on or after  August 1, 1998.  IP is
continuing to review its refinancing plans but could issue up to $864 million of
transitional  funding  instruments  on or  after  August  1,  1998,  under  this
provision.  In addition,  IP would be eligible to issue up to an additional $864
million of transitional  funding  instruments on or after August 1, 1999. Of the
proceeds from the issuance of transitional funding instruments, 80% or more must
be used to retire and  repurchase  IP debt and  equity  while 20% or less can be
used to fund certain other transition costs.

     Construction   expenditures   for  the  years   1995   through   1997  were
approximately  $620.5  million,  including  $17.5  million  of  AFUDC.  Illinova
estimates  that  it will  spend  approximately  $225  million  for  construction
expenditures  for IP in  1998.  IP  construction  expenditures  for  the  period
1998-2002 are expected to total about $1 billion. Additional expenditures may be
required during this period to accommodate transitional  expenditures related to
a competitive  environment,  environmental compliance costs and system upgrades,
which cannot be determined at this time.

     Illinova's  capital  expenditures  for the  years  1998  through  2002,  in
addition to the IP  construction  expenditures,  are  expected  to include  $129
million for nuclear fuel,  $331 million for mandatory  debt  retirement and $762
million for investments by the non-regulated subsidiaries.

     See "Note 4 - Commitments and  Contingencies"  for additional  information.
Internal cash generation will meet  substantially  all  construction and capital
requirements.

Environmental Matters

See "Note 4 - Commitments and  Contingencies"  for a discussion of environmental
matters that impact or could potentially impact Illinova and IP.

Tax Matters

See "Note 7 - Income  Taxes"  for a discussion  of effective tax rates and other
tax issues.
<PAGE>

ILLINOVA CORPORATION

RESPONSIBILITY FOR INFORMATION

The consolidated  financial statements and all information in this annual report
are the responsibility of management. The consolidated financial statements have
been prepared in conformity with generally  accepted  accounting  principles and
include  amounts that are based on  management's  best  estimates and judgments.
Management  also  prepared  the other  information  in the annual  report and is
responsible for its accuracy and  consistency  with the  consolidated  financial
statements. In the opinion of management,  the consolidated financial statements
fairly reflect  Illinova's  financial  position,  results of operations and cash
flows.

Illinova  believes that its accounting and internal  accounting  control systems
are maintained so that these systems  provide  reasonable  assurance that assets
are safeguarded  against loss from  unauthorized use or disposition and that the
financial  records  are  reliable  for  preparing  the  consolidated   financial
statements.

The   consolidated   financial   statements  have  been  audited  by  Illinova's
independent  accountants,  Price  Waterhouse  LLP, in accordance  with generally
accepted auditing  standards.  Such standards include the evaluation of internal
accounting  controls  to  establish  a basis  for  developing  the  scope of the
examination of the consolidated financial statements.  In addition to the use of
independent  accountants,  Illinova  maintains a professional  staff of internal
auditors who conduct  financial,  procedural and special audits. To assure their
independence,  both Price  Waterhouse LLP and the internal  auditors have direct
access to the Audit Committee of the Board of Directors.

The Audit Committee is composed of members of the Board of Directors who are not
active or retired  employees of Illinova.  The Audit  Committee meets with Price
Waterhouse LLP and the internal auditors and makes  recommendations to the Board
of Directors  concerning the  appointment  of the  independent  accountants  and
services to be performed.  Additionally,  the Audit  Committee  meets with Price
Waterhouse LLP to discuss the results of their annual audit, Illinova's internal
accounting controls and financial  reporting matters.  The Audit Committee meets
with the  internal  auditors  to  assess  the  internal  audit  work  performed,
including tests of internal accounting controls.

Larry D. Haab
Chairman, President
and Chief Executive Officer





Larry F. Altenbaumer
Chief Financial Officer,
Treasurer and Controller

ILLINOVA CORPORATION

REPORT OF INDEPENDENT ACCOUNTANTS

PRICE WATERHOUSE LLP

To the Board of Directors and Shareholders of Illinova Corporation

In our opinion,  the consolidated  financial  statements of Illinova Corporation
and its subsidiaries appearing on pages a-11 through a-31 of this report present
fairly, in all material respects, the financial position of Illinova Corporation
and its  subsidiaries  at December  31, 1997 and 1996,  and the results of their
operations  and their cash flows for each of the three years in the period ended
December 31, 1997, in conformity with generally accepted accounting  principles.
These financial  statements are the responsibility of the Company's  management;
our responsibility is to express an opinion on these financial  statements based
on our audits.  We conducted our audits of these  statements in accordance  with
generally accepted auditing standards which require that we plan and perform the
audit to obtain reasonable  assurance about whether the financial statements are
free of material  misstatement.  An audit includes  examining,  on a test basis,
evidence  supporting the amounts and  disclosures  in the financial  statements,
assessing the  accounting  principles  used and  significant  estimates  made by
management,  and evaluating the overall  financial  statement  presentation.  We
believe  that our audits  provide a reasonable  basis for the opinion  expressed
above.

As discussed in Note 1 to the  consolidated  financial  statements,  the Company
discontinued  applying the  provisions  of  Statement  of  Financial  Accounting
Standards No. 71,  "Accounting for the Effects of Certain Types of Regulations,"
for its generation segment of the business in December 1997.

Price Waterhouse LLP
St. Louis, Missouri
February 12, 1998
<PAGE>

ILLINOVA CORPORATION

CONSOLIDATED STATEMENTS OF INCOME
<TABLE>
<S>                                                                              <C>                <C>              <C>    

                                                                                  (Millions of dollars except per share amounts)

For the Years Ended December 31,                                                    1997             1996              1995

Operating Revenues
Electric                                                                        $  1,244.4          $1,202.9         $ 1,252.6
Electric interchange                                                                 175.6             137.6             116.3
Gas                                                                                  353.9             348.2             272.5
Diversified enterprises                                                              735.6              57.6               2.0

  Total                                                                            2,509.5           1,746.3           1,643.4

Operating Expenses
Fuel for electric plants                                                             232.4             248.1             273.9
Power purchased                                                                      217.9              65.2              59.5
Gas purchased for resale                                                             207.7             202.6             138.8
Diversified enterprises                                                              792.3              87.5              15.2
Other operating expenses                                                             290.5             249.9             259.7
Maintenance                                                                          111.7              99.7             100.0
Enhanced retirement and severance                                                      -                 -                37.8
Depreciation and amortization                                                        198.8             190.0             186.5
General taxes                                                                        133.8             131.3             135.0

  Total                                                                            2,185.1           1,274.3           1,206.4

Operating income                                                                     324.4             472.0             437.0

Other Income and Deductions
Miscellaneous-net                                                                     (3.9)             (9.0)             (7.8)
Equity earnings in affiliates                                                         17.5               6.4               2.7

  Total                                                                               13.6              (2.6)             (5.1)

Income before interest charges and income taxes                                      338.0             469.4             431.9

Interest Charges
Interest expense                                                                     136.8             134.7             148.6
Allowance for borrowed funds used during construction                                 (5.0)             (6.5)             (6.0)
Preferred dividend requirements of subsidiary                                         21.5              22.3              23.7

  Total                                                                              153.3             150.5             166.3

Income before income taxes                                                           184.7             318.9             265.6
Income taxes                                                                          80.3             127.9             114.0
Net income before extraordinary item                                                 104.4             191.0             151.6

Extraordinary item net of income tax benefit of $118.0 million (Note 1)             (195.0)              -                 -

Net income (loss)                                                                    (90.6)            191.0             151.6
Carrying amount over (under) consideration paid
  for redeemed preferred stock of subsidiary                                            .2               (.7)             (3.5)

Net income (loss) applicable to common stock                                       $ (90.4)         $   190.3          $ 148.1

Earnings per common share before extraordinary item (basic and diluted)            $   1.41         $   2.51           $ 1.96
Extraordinary item per common share (basic and diluted)                            $  (2.63)               -           $    -
Earnings (loss) per common share (basic and diluted)                               $  (1.22         $   2.51           $ 1.96
Cash dividends declared per common share                                           $   1.24         $   1.15           $ 1.03
Cash dividends paid per common share                                               $   1.24         $   1.12           $ 1.00

Weighted average common shares                                                    73,991,651       75,681,937      75,643,937

</TABLE>


See notes to  consolidated  financial  statements  which are an integral part of
these statements. Prior years restated to conform to new financial format.
<PAGE>

ILLINOVA CORPORATION

CONSOLIDATED BALANCE SHEETS
<TABLE>

                                                                                                             (Millions of dollars)

<S>                                                                                                         <C>        <C>   

December 31,                                                                                                    1997        1996

Assets
Utility Plant, at original cost
Electric (includes construction work in progress of $214.3 million and $212.5 million, respectively)        $  6,690.4 $  6,335.4
Gas (includes construction work in progress of $10.7 million and $21.2 million, respectively)                    663.0      646.1
                                                                                                               7,353.4    6,981.5
Less - accumulated depreciation                                                                                2,808.1    2,419.7
                                                                                                               4,545.3    4,561.8

Nuclear fuel in process                                                                                            6.3        5.3
Nuclear fuel under capital lease                                                                                 126.7       96.4
                                                                                                               4,678.3    4,663.5

Investments and Other Assets                                                                                     198.8      146.2
Current Assets
Cash and cash equivalents                                                                                         33.0       24.6
Accounts receivable (less allowance for doubtful accounts of $5.5 million and $3.0 million, respectively)
  Service                                                                                                        115.6      138.8
  Other                                                                                                          102.3       62.0
Accrued unbilled revenue                                                                                          86.3      106.0
Materials and supplies, at average cost
  Fossil fuel                                                                                                     12.6        7.9
  Gas in underground storage                                                                                      29.3       27.2
  Operating materials                                                                                             76.7       78.1
Prepayments and other                                                                                             64.4       24.1
                                                                                                                 520.2      468.7

Deferred Charges
Deferred Clinton costs                                                                                             -        103.9
Recoverable income taxes                                                                                           -        101.3
Other                                                                                                            185.7      229.2
                                                                                                                 185.7      434.4
                                                                                                            $  5,583.0 $  5,712.8

Capital and Liabilities
Capitalization
Common stock - No par value, 200,000,000 shares authorized; 71,681,937 and 75,681,937 shares outstanding,
  respectively, stated at                                                                                   $  1,425.7 $  1,425.7
Less - Deferred compensation - ESOP                                                                               10.2       14.3
Retained earnings                                                                                                 51.7      233.0
Less - Capital stock expense                                                                                       7.3        8.2
Less - 4,000,000 shares of common stock in treasury at cost                                                       90.4        -
  Total common stock equity                                                                                    1,369.5    1,636.2
Preferred stock of subsidiary                                                                                     57.1       96.2
Mandatorily redeemable preferred stock of subsidiary                                                             197.0      197.0
Long-term debt                                                                                                 1,717.5    1,636.4
  Total capitalization                                                                                         3,341.1    3,565.8

Current Liabilities
Accounts payable                                                                                                 177.3      166.7
Notes payable                                                                                                    415.3      387.0
Long-term debt and lease obligations of subsidiary maturing within one year                                       87.5       47.7
Dividends declared                                                                                                22.9       24.7
Taxes accrued                                                                                                     26.7       43.9
Interest accrued                                                                                                  36.0       34.3
Other                                                                                                             96.0       43.7
                                                                                                                 861.7      748.0

Deferred Credits
Accumulated deferred income taxes                                                                                969.0    1,034.9
Accumulated deferred investment tax credits                                                                      208.3      215.5
Other                                                                                                            202.9      148.6
                                                                                                               1,380.2    1,399.0
                                                                                                            $  5,583.0 $  5,712.8

</TABLE>


(Commitments and Contingencies Note 4)

See notes to  consolidated  financial  statements  which are an integral part of
these statements.
<PAGE>

ILLINOVA CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS
<TABLE>

                                                                                                          (Millions of dollars)
<S>                                                                             <C>                <C>                <C>    

For the Years Ended December 31,                                                       1997              1996           1995
Cash Flows from Operating Activities
Net income (loss)                                                               $     (90.6)       $     191.0        $  151.6
Items not requiring (providing) cash -
  Depreciation and amortization                                                       202.1              195.3           190.0
  Allowance for funds used during construction                                         (5.0)              (6.5)           (6.0)
  Deferred income taxes                                                                30.8               57.4            39.1
  Enhanced retirement and severance                                                     -                  -              37.8
  Extraordinary item                                                                  195.0                -               - 
Changes in assets and liabilities -
  Accounts receivable                                                                 (19.4)             (52.2)           (7.8)
  Accrued unbilled revenue                                                             19.7              (16.9)          (10.2)
  Materials and supplies                                                               (5.4)              (2.1)           22.8
  Accounts payable                                                                     26.4               46.8           (13.6)
  Interest accrued and other, net                                                      14.7               (5.4)            9.5 

Net cash provided by operating activities                                             368.3               407.4          413.2

Cash Flows from Investing Activities
Construction expenditures                                                            (223.9)             (187.3)        (209.3)
Allowance for funds used during construction                                            5.0                 6.5            6.0
Other investing activities                                                            (33.5)              (75.0)         (34.9)

Net cash used in investing activities                                                (252.4)             (255.8)        (238.2)

Cash Flows from Financing Activities
Dividends on common stock                                                             (92.4)              (84.7)         (75.6)
Repurchase of common stock                                                            (90.4)                -              -
Redemptions -
  Short-term debt                                                                    (241.1)             (355.8)        (213.6)
  Long-term debt                                                                     (160.8)             (153.7)          (5.2)
  Preferred stock of subsidiary                                                       (39.0)              (29.5)        (134.5)
Issuances -
  Short-term debt                                                                     269.5               383.2          209.5
  Long-term debt                                                                      250.0                 -              -
  Preferred stock of subsidiary                                                         -                 100.0            - 
  Common stock                                                                          -                   1.1            -
Other financing activities                                                             (3.3)                1.1            5.0

Net cash used in financing activities                                                (107.5)             (138.3)        (214.4)

Net change in cash and cash equivalents                                                 8.4                13.3          (39.4)
Cash and cash equivalents at beginning of year                                         24.6                11.3           50.7

Cash and cash equivalents at end of year                                           $   33.0            $   24.6       $   11.3
</TABLE>



ILLINOVA CORPORATION

CONSOLIDATED STATEMENTS OF RETAINED EARNINGS
<TABLE>

                                                                                                       (Millions of dollars)


For the Years Ended December 31,                                                                    1997      1996      1995

<S>                                                                                              <C>       <C>       <C>    

Balance at beginning of year                                                                     $  233.0  $  129.6  $   58.8
Net income (loss) before dividends and carrying amount adjustment                                   (69.1)    213.3     175.3

                                                                                                    163.9     342.9     234.1

Less -
  Dividends -
    Preferred stock of subsidiary                                                                    21.7      22.6      23.6
    Common stock                                                                                     90.7      86.6      77.4
Plus -
    Carrying amount over (under) consideration paid for redeemed preferred stock of subsidiary         .2       (.7)     (3.5)
                                                                                                   (112.2)   (109.9)   (104.5)
Balance at end of year                                                                           $   51.7  $  233.0  $  129.6
</TABLE>

See notes to  consolidated  financial  statements  which are an integral part of
these statements.
<PAGE>

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1 - Summary of Significant 
Accounting Policies

Principles of Consolidation The consolidated  financial  statements  include the
accounts of Illinova, a holding company, and its subsidiaries: IP, IGC, IIC, and
IEP. IP is a combination electric and gas utility. IGC invests in energy-related
projects and  competes in the  independent  power  market.  IIC's  purpose is to
insure  the  risks of the  subsidiaries  of  Illinova  and risks  related  to or
associated   with  their   business   enterprises.   IEP  develops  and  markets
energy-related  services to the unregulated  energy market throughout the United
States and Canada,  and engages in the brokering and marketing of electric power
and gas. On February 12, 1997, the Illinova Board of Directors approved a merger
of IEP and  IPMI,  another  Illinova  subsidiary.  In the  merger,  IPMI was the
surviving  entity  but  changed  its  name  to  IEP.  See  "Note  2  -  Illinova
Subsidiaries" for additional information.

     All significant intercompany balances and transactions have been eliminated
from  the   consolidated   financial   statements.   All  nonutility   operating
transactions are included in the sections "Diversified  enterprises,"  "Interest
expense,"  "Income  taxes" and  "Other  Income and  Deductions,"  in  Illinova's
Consolidated  Statements  of Income.  Preparation  of  financial  statements  in
conformity with generally  accepted  accounting  principles  requires the use of
management's estimates. Actual results could differ from those estimates.

Regulation  IP is subject to  regulation  by the ICC and the FERC.  Prior to the
passage  of HB  362,  IP  prepared  its  consolidated  financial  statements  in
accordance  with  FAS 71,  "Accounting  for the  Effects  of  Certain  Types  of
Regulation."  Reporting under FAS 71 allows companies whose service  obligations
and prices are  regulated  to  maintain on their  balance  sheets  assets  which
represent costs they expect to recover from customers  through inclusion of such
costs in their future rates.  In July 1997, the EITF concluded that  application
of FAS 71  accounting  should  be  discontinued  at the  date  of  enactment  of
deregulation  legislation for business segments for which a plan of deregulation
has been  established.  The EITF further  concluded that  regulatory  assets and
liabilities  that  originated in the portion of the business  being  deregulated
should be written off unless their recovery is specifically provided for through
future cash flows from the regulated portion of the business.

     Because HB 362 provides  for  market-based  pricing of electric  generation
services,  IP discontinued  application of FAS 71 for its generating  segment in
December 1997 when HB 362 was signed by Illinois  Governor  Edgar.  IP evaluated
its regulatory assets and liabilities associated with its generation segment and
determined  that recovery of these costs was not probable  through rates charged
to  transmission  and  distribution  customers,  the  regulated  portion  of its
business.  Therefore,  IP wrote off  generation-related  regulatory  assets  and
liabilities  of  approximately  $195 million  (net of income  taxes) in December
1997.  These net  assets  related  to  previously  incurred  costs that had been
expected to be collected  through future  revenues,  including  deferred Clinton
post  construction  costs,  unamortized  losses on reacquired debt,  recoverable
income taxes and other  generation-related  regulatory  assets.  At December 31,
1997,  IP's net  investment  in generation  facilities  was $3.5 billion and was
included  in "Utility  Plant,  at Original  Cost" on IP's  Consolidated  Balance
Sheets.

Illinova's principal accounting policies are:

Regulatory  Assets  Regulatory  assets represent  probable future revenues to IP
associated  with certain costs that are expected to be recovered  from customers
through the ratemaking process. Significant regulatory assets are as follows:

(Millions of dollars)                                1997              1996

Deferred Clinton
  post-construction costs                         $     -           $  103.9
Recoverable income taxes                          $     -           $  101.3
Unamortized losses on reacquired debt             $  32.3           $   87.7
Manufactured-gas plant site cleanup costs         $  64.8           $   69.1
DOE decontamination and
  decommissioning fees                            $   6.3           $    5.4



Utility  Plant The cost of  additions  to  utility  plant and  replacements  for
retired property units is capitalized.  Cost includes labor,  materials,  and an
allocation of general and  administrative  costs, plus AFUDC as described below.
Maintenance and repairs,  including replacement of minor items of property,  are
charged to maintenance expense as incurred.  When depreciable property units are
retired,  the original cost and  dismantling  charges,  less salvage value,  are
charged to accumulated depreciation.
<PAGE>

Allowance for Funds Used During Construction The FERC Uniform System of Accounts
defines AFUDC as the net costs for the period of  construction of borrowed funds
used for  construction  purposes  and a  reasonable  rate on other funds when so
used.  AFUDC is capitalized as a component of  construction  work in progress by
those business  segments  applying the  provisions of FAS 71. In 1997,  1996 and
1995,  the pre-tax rate used for all  construction  projects was 5.6%,  5.8% and
6.5%, respectively.  Although cash is not currently realized from the allowance,
it is realized under the ratemaking process over the service life of the related
property through increased revenues resulting from a higher rate base and higher
depreciation expense.  Non-regulated business segments capitalize interest under
the guidelines in FAS 34, "Capitalization of Interest Cost."

Depreciation  For  financial  statement  purposes,  IP  depreciates  the various
classes of depreciable  property over their  estimated  useful lives by applying
composite rates on a straight-line basis. In 1997, 1996 and 1995, provisions for
depreciation were 2.8%, 2.8% and 2.8%, respectively,  of the average depreciable
cost for Clinton.  Provisions for depreciation for all other electric plant were
2.8%,  2.6% and  2.6% in  1997,  1996 and  1995,  respectively.  Provisions  for
depreciation  of gas utility plant,  as a percentage of the average  depreciable
cost, were 3.3%, 3.9% and 3.9% in 1997, 1996 and 1995, respectively.

Amortization  of Nuclear Fuel IP leases nuclear fuel from the Fuel Company under
a capital  lease.  Amortization  of nuclear fuel  (including  related  financing
costs) is determined on a unit of production  basis.  A provision for spent fuel
disposal costs is charged to fuel expense based on kwh generated.  See "Note 4 -
Commitments and  Contingencies"  for discussion of  decommissioning  and nuclear
fuel disposal costs.

Unamortized  Debt Discount,  Premium and Expense  Discount,  premium and expense
associated  with  long-term  debt are  amortized  over the lives of the  related
issues.  Costs  related to refunded  debt for  business  segments  applying  the
provisions of FAS 71 are amortized over the lives of the related new debt issues
or the remaining life of the old debt if no new debt is issued. Costs related to
refunded debt for the generating segment are expensed when incurred.

Revenue and Energy Cost IP records  revenue for  services  provided  but not yet
billed to more closely match revenues with expenses. Unbilled revenues represent
the estimated  amount  customers  will be billed for service  delivered from the
time  meters  were  last  read to the end of the  accounting  period.  Operating
revenues  include related taxes that have been billed to customers in the amount
of $71 million in 1997,  $68 million in 1996 and $66 million in 1995.  The costs
of fuel for the generation of electricity, purchased power and gas purchased for
resale are recovered from customers  pursuant to the electric fuel and purchased
gas  adjustment  clauses.  Accordingly,  allowable  energy  costs that are to be
passed on to customers  in a  subsequent  accounting  period are  deferred.  The
recovery of costs deferred under these clauses is subject to review and approval
by the ICC. In September  1997, IP filed a petition with the ICC that stipulated
customers will not be charged for certain additional costs of energy incurred as
a result of  Clinton  being out of  service.  During  1997,  as a result of this
stipulation, IP did not collect $36.3 million of fuel costs. IP will also forego
recovery  of  additional  fuel  costs in 1998 for the  duration  of the  Clinton
outage.  Under the petition,  fuel costs charged to customers  will be no higher
than average 1995 - 1996 levels  until  Clinton is back in service  operating at
least at a 65% capacity factor for two consecutive months.

Income Taxes  Deferred  income taxes result from temporary  differences  between
book income and taxable  income,  and the tax bases of assets and liabilities on
the balance  sheet.  The temporary  differences  relate  principally to plant in
service and depreciation.

     Investment  tax  credits  used to reduce  federal  income  taxes  have been
deferred and are being amortized to income over the service life of the property
that gave rise to the credits.

     Illinova  and its  subsidiaries  file a  consolidated  federal  income  tax
return.  Income taxes are allocated to the individual  companies  based on their
respective  taxable  income or loss.  See "Note 7 - Income Taxes" for additional
discussion.

Preferred Dividend Requirements of Subsidiary Preferred dividend requirements of
IP  reflected  in the  Consolidated  Statements  of Income are  recorded  on the
accrual basis.

Consolidated  Statements of Cash Flows Cash and cash equivalents include cash on
hand and  temporary  investments  purchased  with an initial  maturity  of three
months or less.  Capital lease obligations not affecting cash flows increased by
$30  million,   $31  million  and  $19  million  during  1997,  1996  and  1995,
respectively. Income taxes and interest paid are as follows:

                                                        Years ended December 31,

(Millions of dollars)               1997             1996              1995

Income taxes                  $        96.2     $       65.9     $         64.7
Interest                      $       145.3     $      148.5     $        152.4
<PAGE>

Interest  Rate Cap  Generally,  premiums  paid for  purchased  interest rate cap
agreements are being  amortized to interest  expense over the terms of the caps.
Unamortized premiums are included in "Current Assets,"  "Prepayments and other,"
in the  Consolidated  Balance  Sheets.  Amounts  to be  received  under  the cap
agreements are accrued and recognized as a reduction in interest expense.

Forward  Contracts of Subsidiary  In the normal  course of business,  IEP enters
into  contracts for the purchase and sale  (physical  delivery) of  electricity.
When, through use of a market price analysis,  it is deemed probable that a loss
will occur on  fulfillment  of a  contract,  a loss  (contingent  liability)  is
recorded.  When markets allow,  IEP will hedge price exposure through the use of
electricity futures contracts and swaps.

New  Pronouncements  The FASB issued FAS 128,  "Earnings Per Share"  in February
1997, effective for financial statements issued after December 15, 1997. FAS 128
establishes  standards  for  computing  and  presenting  EPS  and  replaces  the
presentation  of primary EPS and fully diluted EPS with a presentation  of basic
EPS and diluted  EPS,  respectively.  Reconciliations  of the income  (loss) and
number of shares for the basic and diluted EPS calculations are as follows:

(Millions of dollars)               1997             1996              1995

Net income before
  extraordinary item
  (basic and diluted)             $ 104.6          $ 190.3           $ 148.1
Extraordinary item
  (basic and diluted)             $(195.0)         $   -             $   -
Net income (loss)
  applicable to common
  stock (basic and diluted)       $ (90.4)         $  190.3          $ 148.1

Weighted average common
  shares for basic EPS         73,991,651        75,681,937       75,643,937

Effect of dilutive securities -
  stock options                     7,745            33,745           19,914

Adjusted weighted average
  common shares for
  diluted EPS                  73,999,396        75,715,682       75,663,851



     The  FASB  issued  FAS  129,   "Disclosure  of  Information  about  Capital
Structure" in February  1997,  effective for  financial  statements  for periods
ending after  December 15, 1997.  FAS 129  establishes  standards for disclosing
information  about an  entity's  capital  structure  and  contains  no change in
disclosure  requirements  for  entities  that  were  previously  subject  to the
requirements  of Accounting  Principles  Board Opinions 10 and 15 and FAS 47. No
new requirements are imposed on Illinova by FAS 129.

     The FASB  issued FAS 130,  "Reporting  Comprehensive  Income" in June 1997,
effective  for  fiscal  years   beginning  after  December  15,  1997.  FAS  130
establishes  standards for reporting and display of comprehensive income and its
components in a financial  statement that is displayed with the same  prominence
as other financial  statements.  Illinova  continues to analyze FAS 130 and does
not currently expect it to have a significant impact on its financial  statement
presentation.

     The FASB issued FAS 131,  "Disclosures  about Segments of an Enterprise and
Related  Information"  in June  1997,  effective  for  periods  beginning  after
December 15, 1997. FAS 131 supersedes FAS 14, "Financial  Reporting for Segments
of a Business  Enterprise."  FAS 131  establishes  standards  for the way public
business  enterprises  report financial and descriptive  information about their
reportable  operating  segments  in  their  financial   statements.   Generally,
financial  information  is  required  to be  reported  on the basis that is used
internally  for  evaluating  segment  performance  and  deciding how to allocate
resources to segments.  Illinova continues to evaluate the provisions of FAS 131
and  determine  the impact of the revised  disclosure  requirements  on its 1998
financial statements.

Note 2 - Illinova Subsidiaries

Illinova,  a holding  company,  is the  parent of IP,  IGC,  IEP and IIC.  IP is
engaged  in the  generation,  transmission,  distribution  and sale of  electric
energy and the distribution, transportation and sale of natural gas in the state
of Illinois.  IGC invests in  energy-related  projects  throughout the world and
competes  in  the   independent   power   market.   IEP   develops  and  markets
energy-related  services to the unregulated  energy market throughout the United
States and  Canada.  On February  12,  1997,  the  Illinova  Board of  Directors
approved a merger of IEP and IPMI,  another wholly owned subsidiary of Illinova.
IPMI formerly  engaged in the brokering and marketing of electric power and gas.
In the merger, IPMI was the surviving entity but changed its name to IEP. IIC is
a captive insurance company whose primary business is to insure the risks of the
subsidiaries  of Illinova and risks related to or associated with their business
enterprises.  IGC and IEP are wholly  owned  subsidiaries  of  Illinova.  IP has
preferred shares outstanding, but its common stock is wholly owned by Illinova.
<PAGE>

     IGC has  investments in  power-producing  facilities  throughout the world,
some operating and some under  construction.  The following table summarizes its
investments:

                          Year of      Fuel     Total      In Service
Location                 Investment    Type      MW           Date

Domestic & England
  Teesside, England          1993   Natural Gas  1875         1993
  Ferndale, Washington       1994   Natural Gas   245         1994
  Paris, Texas               1994   Natural Gas   230         1989
  Cleburne, Texas            1994   Natural Gas   258         1996
  Long Beach, California     1995   Natural Gas    70         1989
  Pepperell, Massachusetts   1995   Natural Gas    38         1995
  Joppa, Illinois            1996   Coal         1015         1955

Latin America
  Puerto Cortez, Honduras    1994   Diesel         80      1994/95
  Old Harbour, Jamaica       1995   Diesel         74         1995
  Aguaytia, Peru             1995   Natural Gas   155         1998
  Barranquilla, Colombia     1996   Natural Gas   400   1995/96/98

Asia
  Zhejiang Province, China   1995   Coal           24         1996
  Balochistan, Pakistan      1996   Natural Gas   586         1998
  Hunan Province, China      1997   Coal           24         1999



     IGC's ownership interest totals 440 MW for the domestic and English plants,
259 MW for the Latin  American  plants,  and 130 MW for the Asian plants.  As of
December 31, 1997, IGC has approximately  $160 million invested in the 829 MW it
owns. IGC's investments are primarily accounted for under the equity method.

     At December 31, 1997, Illinova's net investment in IGC was $180 million.

     IEP  focuses  on the  development  and sale of  energy  and  energy-related
services  primarily in the Midwestern and Western regions of North America.  IEP
develops and sells  energy-related  services designed to assist target customers
in assessing  current energy  consumption  patterns,  and to enable customers to
reduce  energy usage  through  increased  efficiency  by changing  practices and
upgrading equipment and facilities.  Currently IEP is developing and marketing a
series of energy-related information collection and analysis tools, collectively
known as EQ services.  These services include software tools that a customer may
utilize  to  conduct  its own  analysis  as well as a service  bureau  that will
perform these  services and bill  consolidation  for the customer.  IEP has also
expanded the project  management and  engineered  solutions  business,  formerly
known  as  Illinova  Energy  Services,   to  provide  delivery   capability  for
energy-related  equipment and facilities  improvements throughout the Midwestern
and Western United States.

     IEP owns 50% of Tenaska  Marketing  Ventures,  in partnership  with Tenaska
Marketing,  Inc. Tenaska Marketing  Ventures focuses on natural gas marketing in
the Midwestern  United States.  In the Western United States,  IEP is one of the
largest power  marketers,  purchasing  and selling  electricity in the wholesale
market. In the Midwest, IEP has developed a retail natural gas business, serving
industrial and commercial customers.

     During 1997, IEP incurred losses of $30 million  (before taxes)  associated
with the wholesale power marketing  business,  including accrued losses of $13.5
million  (before  taxes)  for  contracts  not yet  settled.  These  losses  were
primarily caused by a single contract entered into by IEP during 1996. See "Note
4 - Commitments and Contingencies" for information about IEP contingencies.

     At December 31, 1997, Illinova's net investment in IEP was $28 million.

     In 1997, IIC insured certain risks of IP for a premium of $16.7 million. In
turn,  IIC will  reinsure  this risk with a  reinsurer.  At December  31,  1997,
Illinova's net investment in IIC was approximately $1.5 million.

Note 3 - Clinton Power Station

Clinton Operations

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 and again in June 1997,  the NRC named Clinton among plants
having a trend of declining  performance.  In June 1997, IP committed to conduct
an ISA to thoroughly  assess Clinton's  performance.  The ISA was conducted by a
team of 30  individuals  with  extensive  nuclear  experience and no substantial
previous  involvement  at Clinton.  Their report  concluded  that the underlying
reasons for the  performance  problems at Clinton  were  ineffective  leadership
throughout the  organization in providing  standards of excellence,  complacency
throughout the organization,  barrier weaknesses and weaknesses in teamwork.  In
late October, a team commissioned by the NRC performed an evaluation to validate
the ISA results.  In December,  this team concluded that the findings of the ISA
accurately characterized Clinton's performance deficiencies and their causes.
<PAGE>

     In September  1997, the NRC advised IP that it must submit a written report
to the NRC at least two weeks  prior to  restarting  Clinton,  giving the agency
reasonable  assurance that IP's actions to correct  recurring  weaknesses in the
corrective  action program have been  effective.  After the report is submitted,
the NRC  staff  plans to meet  with  IP's  management  to  discuss  the  plant's
readiness for restart.

     In November  1997,  Larry Haab,  Chief  Executive  Officer of IP,  publicly
pledged to address the findings of the ISA, to improve Clinton,  and provide the
resources necessary to restart the plant.  Further, in January 1998, IP and PECO
announced an agreement  under which PECO will  provide  management  services for
Clinton.  The new  management  team initially will consist of nine people in key
positions, including chief nuclear officer and plant manager.

     Although  a PECO team will help  manage  the  plant,  IP will  continue  to
maintain the operating license for Clinton and retain ultimate  oversight of the
plant. The plant will remain staffed primarily by IP employees.

     PECO  operates  two  stations,  Limerick  and Peach  Bottom,  each with two
boiling  water  reactors  similar to the one at Clinton.  Although  PECO's Peach
Bottom Station was a troubled plant that experienced a two-year  outage,  it was
turned around,  and both plants have set performance  records for long operating
runs and short refueling outages,  receiving excellent  performance ratings from
the NRC and the Institute of Nuclear Power Operations.

     On January 21,  1998,  the NRC placed  Clinton on its Watch  List.  Nuclear
plants are placed on the Watch List when the NRC believes additional  regulatory
oversight is required because of declining  performance.  Clinton will remain on
the Watch List until consistent improved performance is demonstrated. During the
period  Clinton  remains on the Watch List, the NRC will monitor it more closely
than  plants not on the Watch  List.  This may  include  increased  inspections,
additional  required  documentation,  NRC-required  approval  of  processes  and
procedures and higher-level NRC oversight.

Transfer of Soyland's Ownership Share to IP

In March 1997, the NRC issued an order  approving  transfer to IP of the Clinton
operating  license  related to Soyland's  13.2% ownership in connection with the
transfer from Soyland to IP of all of Soyland's  interest in Clinton.  Soyland's
title  to the  plant  and  directly  related  assets  such as  nuclear  fuel was
transferred to IP in May 1997.  Soyland's nuclear  decommissioning  trust assets
were  transferred to IP in May 1997,  consistent  with IP's assumption of all of
Soyland's ownership obligations, including those related to decommissioning.

     The FERC  approved an amended PCA in July 1997.  The amended PCA  obligates
Soyland to purchase all of its capacity and energy needs from IP for at least 10
years.  The amended PCA  provides  that a contract  cancellation  fee be paid by
Soyland to IP in the event that a Soyland member  terminates its membership from
Soyland.  In  May  1997,  three  distribution   cooperative  members  terminated
membership  by buying out of their  long-term  wholesale  power  contracts  with
Soyland. As a result,  Soyland paid a fee of $20.8 million to IP in June 1997 to
reduce its future base capacity charges.  Fee proceeds of $2.9 million were used
to offset the costs of acquiring  Soyland's  share of Clinton with the remaining
$17.9 million recorded as interchange revenue.

     In December  1997,  Soyland signed a letter of intent to pay in advance the
remainder of its base capacity charges in the PCA. The fee of approximately  $70
million will be deferred and recognized as interchange  revenue over the initial
term of the PCA. The payment is  contingent  on Soyland  obtaining the necessary
financing and regulatory approvals in 1998.

Clinton Cost and Risks

Clinton was placed in service in 1987 and represents approximately 20.3% of IP's
installed   generation   capacity.   The   investment  in  Clinton   represented
approximately 54% of Illinova's total assets at December 31, 1997. See "Note 1 -
Summary of Significant Accounting Policies" for additional information.

     IP's  Clinton-related  costs represented 38% of Illinova's total 1997 other
operating,   maintenance  and  depreciation   expenses.   Clinton's   equivalent
availability was 0%, 66% and 76% for 1997, 1996 and 1995, respectively.

     Ownership of an operating nuclear generating unit exposes IP to significant
risks,  including  increased and changing  regulatory,  safety and environmental
requirements  and the uncertain future cost of closing and dismantling the unit.
IP expects  to be  allowed to  continue  to  operate  Clinton;  however,  if any
unforeseen or unexpected  developments  would prevent it from doing so, IP would
be materially  adversely affected.  See "Note 4 - Commitments and Contingencies"
for additional information.
<PAGE>

Note 4 - Commitments and Contingencies

Commitments

Illinova   estimates  that  it  will  spend   approximately   $225  million  for
construction  expenditures for IP in 1998. IP construction  expenditures for the
period 1998-2002 are expected to total about $1 billion. Additional expenditures
may be  required  during this period to  accommodate  transitional  expenditures
related to a competitive environment,  environmental compliance costs and system
upgrades, which cannot be determined at this time.

     Illinova's  capital  expenditures  for the  years  1998  through  2002,  in
addition to the IP  construction  expenditures,  are  expected  to include  $129
million for nuclear fuel,  $331 million for mandatory  debt  retirement and $762
million for investments by the non-regulated subsidiaries.

     In addition, IP has substantial  commitments for the purchase of coal under
long-term  contracts.  Estimated coal contract commitments for 1998 through 2002
are $619 million  (excluding price escalation  provisions.) Total coal purchases
for 1997,  1996 and 1995 were  $181  million,  $184  million  and $168  million,
respectively. IP has contracts with various natural gas suppliers and interstate
pipelines  to provide  natural gas supply,  transportation  and leased  storage.
Estimated  committed  natural  gas,  transportation  and  leased  storage  costs
(including  pipeline  transition costs) for 1998 through 2002 total $56 million.
Total  natural gas  purchased  for 1997,  1996 and 1995 was $185  million,  $207
million and $150 million, respectively.  IP's estimated nuclear fuel commitments
for Clinton are approximately $11 million for uranium concentrates through 2001,
$3 million for  conversion  services  through 2002,  $35 million for  enrichment
services through 1999 and $232 million for fabrication services through 2019. IP
is  committed  to purchase  approximately  $20  million of  emission  allowances
through 1999. IP  anticipates  that all  gas-related  costs will be  recoverable
under IP's UGAC. See the subcaption "Fuel Cost Recovery" below for discussion of
the UFAC.

Fuel Cost Recovery On September  29, 1997,  the ICC approved an IP petition that
stipulates  customers will not be charged for certain additional costs of energy
incurred as a result of Clinton being out of service.  Under the petition,  fuel
costs  charged to  customers  will be no higher than  average 1995 - 1996 levels
until Clinton is back in service operating at least at a 65% capacity factor for
two  consecutive  months.  See "Note 3 - Clinton Power  Station"  for additional
information about Clinton.

     As a  result  of  Illinois  deregulation  legislation,  IP  may  choose  to
eliminate  application  of the  UFAC.  IP's base  rates  would  still  include a
component for some level of recovery of fuel costs,  but IP would not be able to
pass  through  to  customers   increased  costs  of  purchasing  fuel,  emission
allowances or replacement  power.  Upon elimination of the UFAC, base rates will
include a fixed fuel cost factor equivalent to the average 1995 - 1996 fuel cost
levels.  Future  recovery of fuel costs is  uncertain,  as IP will decrease base
electric  rates to  residential  customers  beginning  August  1998 and  certain
customers will be free to choose their electric generation supplier beginning in
October  1999.  The extent to which fuel costs are  recovered  will  depend on a
number of factors  including  the future  market prices for wholesale and retail
energy, when Clinton returns to service,  and whether IP elects to eliminate the
UFAC.

Insurance IP maintains  insurance for certain losses  involving the operation of
Clinton.  For  physical  damage to the plant,  IP's  insurance  program  has two
layers:  1) a primary layer of $500 million provided by nuclear insurance pools;
and 2) an excess  coverage layer of $1.1 billion  provided by an  industry-owned
mutual insurance  company for a total coverage of $1.6 billion.  In the event of
an  accident  with  an  estimated  cost  of  reactor   stabilization   and  site
decontamination  exceeding $100 million,  NRC regulations require that insurance
proceeds be  dedicated  and used first to return the reactor to, and maintain it
in, a safe and stable condition, and second to decontaminate the reactor station
site.   The   insurers   also  provide   coverage  for  the   shortfall  in  the
Decommissioning  Trust  Fund  caused  by the  premature  decommissioning  of the
reactor due to an accident.  In the event insurance  limits are not exhausted by
the above,  the  remaining  coverage  will be applied to  property  damage and a
portion of the value of the  undamaged  property.  In addition,  while IP has no
reason to anticipate a serious nuclear accident at Clinton,  if such an incident
should occur,  the claims for property  damage and other costs could  materially
exceed the limits of current or available insurance coverage. In the event of an
extended  shutdown  of  Clinton  due to  accidental  property  damage,  IP  also
purchases approximately $1.5 million per week of business interruption insurance
coverage through an industry-owned mutual insurance company. This insurance does
not provide coverage until Clinton has been out of service for 21 weeks.
<PAGE>

     All  United   States   nuclear   reactor   licensees  are  subject  to  the
Price-Anderson  Act.  This act currently  limits public  liability for a nuclear
incident  to $8.9  billion.  Private  insurance  covers the first $200  million.
Retrospective  premium  assessments against each licensed nuclear reactor in the
United States provide excess coverage. Currently, the liability to these nuclear
reactor  licensees  for such an  assessment  would be up to  $79.3  million  per
incident, not including premium taxes which may be applicable, payable in annual
installments of not more than $10 million.

     A Master Worker Policy covers worker tort claims  alleging  bodily  injury,
sickness or disease due to the nuclear  energy  hazard for workers whose initial
radiation  exposure  occurred  on or after  January 1,  1988.  The policy has an
aggregate limit of $200 million that applies to the commercial  nuclear industry
as a whole. A provision provides for automatic reinstatement of policy limits up
to an additional $200 million.

     IP may be subject to other risks that may not be  insurable,  or the amount
of insurance  carried to offset the various  risks may not be sufficient to meet
potential  liabilities  and losses.  There is also no assurance  that IP will be
able  to  maintain   insurance  coverage  at  its  present  level.  Under  those
circumstances,  such losses or liabilities may have a substantial adverse effect
on Illinova's and IP's financial positions.

Decommissioning  and Nuclear Fuel  Disposal IP is  responsible  for the costs of
decommissioning  Clinton and for spent nuclear fuel disposal costs. In May 1997,
consistent  with IP's  assumption of all of Soyland's  ownership  obligations of
Clinton,  Soyland's nuclear decommissioning trust assets were transferred to IP.
Future  decommissioning  costs related to Soyland's former share of Clinton will
be  provided  through the PCA between  Soyland and IP. IP is  collecting  future
decommissioning  costs for the remaining portion of Clinton through its electric
rates based on an  ICC-approved  formula that allows IP to adjust rates annually
for changes in decommissioning cost estimates. Illinois deregulation legislation
provides for the continued recovery of decommissioning  costs from IP's delivery
customers.

     IP  concluded  a  site-specific  study  in 1996 to  estimate  the  costs of
dismantlement, removal and disposal of Clinton. This study resulted in projected
decommissioning  costs of $538  million  (1996  dollars) or $969  million  (2026
dollars,  assuming a 2% inflation factor.) Regulatory approval of this increased
decommissioning  cost level was  received in August 1997.  This  estimate is the
basis used for  funding  decommissioning  costs  through  rates  charged to IP's
customers and through the PCA with Soyland.

     External  decommissioning  trusts,  as  prescribed  under  Illinois law and
authorized  by the ICC,  accumulate  funds  for the  future  decommissioning  of
Clinton  based on the expected  service  life of the plant.  For the years 1997,
1996 and 1995,  IP  contributed  $5.3  million,  $3.9 million and $5.0  million,
respectively,  to its external nuclear decommissioning trust funds. The balances
in these nuclear  decommissioning funds at December 31, 1997 and 1996 were $62.5
million and $41.4 million,  respectively.  Decommissioning funds are recorded as
assets  on  the  balance  sheet.  A  decommissioning   liability   approximately
equivalent to trust assets is also recorded. IP recognizes earnings and expenses
from the trust fund as changes in its assets and  liabilities  relating to these
funds occur.

     The FASB is  reviewing  the  accounting  for closure  and removal  costs of
long-lived  assets.  Changes to current  electric  utility  industry  accounting
practices for  decommissioning  may result in recording the estimated total cost
for   decommissioning  as  a  liability  and  an  increase  to  plant  balances,
depreciating the increased plant balances,  and reporting trust fund income from
the  external  decommissioning  trusts as  investment  income  rather  than as a
reduction to decommissioning  expense. Based on current information,  management
believes  that  these  changes  will not have an  adverse  effect on  results of
operations   due  to  existing  and   anticipated   future  ability  to  recover
decommissioning costs through rates.

     Under the Nuclear Waste Policy Act of 1982, the DOE is responsible  for the
permanent  storage and disposal of spent nuclear fuel. The DOE currently charges
one mill ($0.001) per net kwh (one dollar per MWH) generated and sold for future
disposal of spent fuel. IP is recovering  these charges  through rates. In 1996,
the  District  of  Columbia  Circuit  Court of Appeals  issued an order,  at the
request of nuclear-owning  utilities and state regulatory  agencies,  confirming
DOE's  unconditional  obligation to take  responsibility  for spent nuclear fuel
commencing  in  1998,  even if it has no  permanent  repository  at  that  time.
Notwithstanding  this  decision,  which  the  DOE did  not  appeal,  the DOE has
indicated to all nuclear  utilities that it may experience delay in performance.
The impact of any such delay on IP will depend on many  factors,  including  the
duration of such delay and the cost and feasibility of interim, on-site storage.
<PAGE>

Environmental Matters

Clean Air Act To comply with the SO2 emission reduction  requirements of Phase I
(1995-1999)  of the Acid Rain Program of the 1990 Clean Air Act  Amendments,  IP
continues  to  purchase  emission  allowances.  An  emission  allowance  is  the
authorization  by the U.S.  EPA to emit one ton of SO2.  The ICC  approved  IP's
Phase I Acid Rain  Compliance  Plan in September  1993,  and IP is continuing to
implement that plan. IP has acquired sufficient emission allowances to meet most
of its  anticipated  needs for 1998 and 1999 and will  purchase the remainder on
the spot market.  In 1993, the Illinois General Assembly passed and the governor
signed  legislation   authorizing,   but  not  requiring,   the  ICC  to  permit
expenditures  and revenues  from  emission  allowance  purchases and sales to be
included in rates charged to customers as a cost of fuel. In December  1994, the
ICC approved the recovery of emission  allowance costs through the UFAC. See the
subcaption  "Fuel  Cost  Recovery"  above  for  discussion  of  the  UFAC.  IP's
compliance plan will defer, until at least 2000, any need for scrubbers or other
capital  projects  associated with SO2 emission  reductions.  Phase II (2000 and
beyond) SO2  emission  reduction  requirements  of the Acid Rain  Program  could
require  additional  actions  and may  result in  capital  expenditures  and the
purchase of emission allowances.

     To comply with the Phase I NOx emission reduction  requirements of the acid
rain  provisions of the Clean Air Act, IP installed  low-NOx  burners at Baldwin
Unit 3 and  Vermilion  Unit 2. On November 29, 1994,  the Phase I NOx rules were
remanded to the U.S. EPA. On April 13, 1995, the U.S. EPA reinstated,  with some
modifications,  the  Phase  I NOx  rules  effective  January  1,  1996.  IP  was
positioned to comply with these revised rules without  additional  modifications
to any of its generating plants.

     The U.S. EPA issued  revised  Phase II NOx emission  limits on December 10,
1996. IP has prepared a Phase II Compliance Plan.  Litigation over the scope and
legality of these  Phase II NOx limits  precludes  a precise  quantification  of
anticipated capital costs for compliance; however, capital expenditures for IP's
NOx Compliance  Plan are expected to be $100 million prior to the year 2000. The
majority of this  investment  will be directed to Baldwin Units 1 and 2 and will
occur in conjunction with replacement of the air heaters on these units.

In addition,  regulators  are  continuing to examine  potential  approaches  for
compliance  with current  federal  ozone air quality  standards.  On November 7,
1997, the U.S. EPA proposed air pollution rules which would require  substantial
reductions of NOx emissions in Illinois and 21 other states.  The proposal would
require the  installation  of NOx controls by September  2002.  This proposal is
expected  to be  finalized  by November  1998 with  Illinois  utility  reduction
requirements  specified in 1999.  Preliminary  cost estimates to comply with the
proposed NOx  limitations are $130 to $150 million beyond what is already needed
to comply with the NOx  requirements  of Phase II of the Acid Rain Program.  The
legality of this proposal along with its technical feasibility is expected to be
challenged by a number of utilities and utility groups, including IP.

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  1990  levels  during  the years  2008  through  2012 and to make  further
reductions  thereafter.  This  Protocol  must be ratified  by the United  States
Senate.  United States Senate Resolution 98 (passed 95 - 0) indicates the Senate
would not  ratify an  agreement  that fails to involve  all  countries  or would
damage the United States economy.  Ratification  will be a major political issue
since the Protocol does not contain key elements that Senate  Resolution 98 said
would be necessary for ratification. It is anticipated that ratification will be
delayed until after 1998.

     IP will face major  changes in how 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.

Manufactured-Gas  Plant IP's estimated liability for MGP site remediation is $65
million.  This amount represents IP's current best estimate of the costs that it
will  incur in  remediation  of the 24 MGP sites  for  which it is  responsible.
Because of the  unknown  and  unique  characteristics  at each  site,  IP cannot
presently determine its ultimate liability for remediation of the sites.
<PAGE>

     IP is currently  recovering  MGP site  remediation  through  tariff  riders
approved by the ICC.  Accordingly,  IP has  recorded a  regulatory  asset on its
balance sheet totaling $65 million as of December 31, 1997.  Management  expects
that cleanup costs will be fully recovered from IP's customers.

     To offset the burden imposed on its customers,  IP has initiated litigation
against a number of  insurance  carriers.  Any  settlement  proceeds  or damages
recovered  from the  carriers  will  continue to be  credited to IP's  customers
through the tariff rider mechanism which the ICC previously approved.

Electric and Magnetic Fields The possibility that exposure to EMF emanating from
power  lines,  household  appliances  and other  electric  sources may result in
adverse  health   effects   continues  to  be  the  subject  of  litigation  and
governmental,  medical and media attention. Litigants have also claimed that EMF
concerns  justify recovery from utilities for the loss in value of real property
exposed to power lines, substations and other such sources of EMF. The number of
EMF cases has declined in the last few years as more national and  international
science  commissions  have  concluded  that an EMF  health  risk  has  not  been
established.  Additional  research  is being  conducted  to  attempt  to resolve
continuing scientific  uncertainties.  On July 3, 1997, President Clinton signed
legislation   extending  the  National  EMF  Research  and  Public   Information
Dissemination  Program  through 1998.  Research  results,  policy  decisions and
public information  developments will continue into 1999. It is too soon to tell
what, if any, impact these actions may have on IP's and Illinova's  consolidated
financial  positions.  IP  continues  its  commitment  to address  customer  and
employee concerns related to the EMF issue.

Other

Legal Proceedings IP is involved in legal or administrative  proceedings  before
various  courts and agencies  with respect to matters  occurring in the ordinary
course  of  business,  some of  which  involve  substantial  amounts  of  money.
Management  believes that the final  disposition of these  proceedings  will not
have a material  adverse effect on the  consolidated  financial  position or the
results of operations.

Accounts  Receivable IP sells  electric  energy and natural gas to  residential,
commercial and industrial customers  throughout Illinois.  At December 31, 1997,
72%,  17% and 11% of  "Accounts  receivable  - Service"  were from  residential,
commercial and industrial  customers,  respectively.  IP maintains  reserves for
potential   credit  losses  and  such  losses  have  been  within   management's
expectations.  During 1997, IP increased its reserve for doubtful  accounts from
$3.0 million to $5.5 million.

Contingencies

Soyland In March 1997, the NRC issued an order  approving  transfer to IP of the
Clinton  operating  license  related to Soyland's  13.2% ownership in connection
with the transfer from Soyland to IP of all of Soyland's interest in Clinton.

     The FERC  approved an amended PCA in July 1997.  The amended PCA  obligates
Soyland to purchase  all of its  capacity  and energy needs from IP for at least
ten years (the  initial  term of the PCA) and  includes a provision  that allows
Soyland  to pay its base  capacity  charges in  advance.  The  amended  PCA also
provides that a contract  cancellation  fee will be paid by Soyland to IP in the
event that a Soyland  Cooperative member terminates its membership from Soyland.
In May 1997, three distribution  cooperative members terminated their membership
by buying out of their  respective  long-term  wholesale  power  contracts  with
Soyland. As a result,  Soyland paid a fee of $20.8 million to IP in June 1997 to
reduce its future base capacity charges.

     In December  1997,  Soyland signed a letter of intent to pay in advance the
remainder of its base capacity charges in the PCA. The fee of approximately  $70
million will be deferred and recognized as interchange  revenue over the initial
term of the PCA.  The  payment  will be  contingent  on  Soyland  obtaining  the
necessary financing and regulatory approvals in 1998.

Nuclear Fuel Lease See "Note 8 - Capital Leases" for discussion of contingencies
related to IP's nuclear fuel lease.

Internal  Revenue  Service  Audit The  Internal  Revenue  Service  is  currently
auditing  IP's federal  income tax returns for the years 1991 through  1993.  At
this time,  the outcome of the audit cannot be determined;  however,  management
does not expect that the results will have a material adverse effect on IP's and
Illinova's  consolidated  financial  positions or results of  operations.  For a
detailed discussion of income taxes, see "Note 7 - Income Taxes."

Illinova  Energy  Partners,  Inc. IEP buys and sells  electricity in the Western
United States. In the normal course of business,  IEP is required to incur price
exposure on the electricity  bought or sold.  Where the markets allow,  IEP will
hedge such exposure through the use of electricity  futures contracts or through
swaps with qualified  counterparties.  The aggregate  notional value, fair value
and  unrealized  gain related to futures  contracts  outstanding at December 31,
1997,  are  immaterial.  In addition,  IEP  considers  the risk of  counterparty
non-performance to be remote.

     At December  31, 1997,  IEP had  electricity  sales and purchase  contracts
which exposed the company to risk as a result of price volatility.  For the year
ended  December 31, 1997,  IEP accrued  losses of $13.5 million  (before  taxes)

<PAGE>

relating to contracts not yet settled.  Illinova  guarantees the  performance of
IEP and Tenaska Marketing  Ventures up to an aggregate of $80 million for credit
support.  The level of credit  support in place at December  31,  1997,  was $45
million. See "Note 2 - Illinova  Subsidiaries"  for additional information about
IEP.


Note 5 - Lines of Credit 
and Short-Term Loans

IP has total lines of credit  represented by bank commitments  amounting to $354
million,  all of which were unused at December 31,  1997.  These lines of credit
are  renewable  in May 1998,  August 1998 and May 2002.  These bank  commitments
support the amount of commercial paper outstanding at any time,  limited only by
the amount of unused bank  commitments,  and are  available to support  other IP
activities.  In addition,  Illinova's total lines of credit  represented by bank
commitments  amount to $150  million,  of which  $111.5  million  was  unused at
December 31, 1997. Illinova's letters of credit total $31.1 million.

     IP pays  facility  fees up to .10% per annum on $350  million  of the total
lines of credit,  regardless of usage.  The interest  rate on  borrowings  under
these  agreements is, at IP's option,  based upon the lending  banks'  reference
rate, their  Certificate of Deposit rate, the borrowing rate of key banks in the
London interbank market or competitive bid.

     IP has letters of credit totaling $206 million and pays fees up to .45% per
annum on the unused amount of credit.

     In  addition,  IP and the Fuel  Company  each have a  short-term  financing
option to obtain funds not to exceed $30 million. IP and the Fuel Company pay no
fees for this uncommitted  facility and funding is subject to availability  upon
request.

     Illinova  had $38.5  million of  borrowings  against its lines of credit at
December 31, 1997. For the years 1997,  1996 and 1995,  Illinova  (including IP)
had short-term borrowings consisting of bank loans, commercial paper, extendible
floating rate notes and other  short-term  debt  outstanding at various times as
follows:

(Millions of dollars, except rates)               1997        1996       1995

Short-term borrowings
  at December 31,                              $  415.3    $  387.0    $  359.6

Weighted average interest
  rate at December 31,                              6.1%       5.8%        6.0%

Maximum amount
  outstanding
  at any month end                             $  415.3   $  387.0    $  359.6

Average daily borrowings
  outstanding during
  the year                                     $  298.5   $  261.9    $  306.5

Weighted average interest
  rate during the year                              5.8%       5.7%       6.2%

     Interest rate cap  agreements  are used to reduce the  potential  impact of
increases  in interest  rates on  floating-rate  debt.  IP's two  variable  rate
interest rate cap  agreements  cover up to $114.6  million of commercial  paper.
These agreements  entitle IP to receive from a counterparty on a quarterly basis
the amount,  if any,  by which IP's  interest  payments  on a nominal  amount of
commercial  paper exceed the interest rate set by the cap. On December 31, 1997,
the cap rates were set at 7.75% and 8.0% while the current market rate available
to IP was 5.8%.

     IP also has a $50 million interest rate swap in effect through October 1998
where IP pays 5.92% and receives the LIBOR variable rate, payable quarterly.

Note 6 - Facilities Agreements

On March 13,  1997,  the NRC  issued an order  approving  transfer  to IP of the
Clinton  operating  license related to Soyland's 13.2% ownership  obligations in
connection with the transfer from Soyland to IP of all of Soyland's  interest in
Clinton pursuant to an agreement  reached in 1996.  Soyland's title to the plant
and directly related assets such as nuclear fuel was transferred to IP on May 1,
1997. Soyland's nuclear  decommissioning  trust assets were transferred to IP on
May 19, 1997,  consistent  with IP's  assumption  of all of Soyland's  ownership
obligations including those related to decommissioning.

     The FERC approved an amended PCA between  Soyland and IP in July 1997.  The
amended PCA  obligates  Soyland to purchase all of its capacity and energy needs
from IP for at least  ten  years.  The  amended  PCA  provides  that a  contract
cancellation  fee will be paid by  Soyland  to IP in the  event  that a  Soyland
member  terminates its membership in Soyland.  In May 1997,  three  distribution
cooperative   members  terminated  their  membership  by  buying  out  of  their
respective  long-term  wholesale  power  contracts  with  Soyland.  This  action
resulted in Soyland  paying a fee of $20.8 million to IP in June 1997, to reduce
its future base  capacity  charges.  Fee  proceeds of $2.9  million were used to
offset the costs of  acquiring  Soyland's  share of Clinton  with the  remaining
$17.9 million recorded as interchange  revenue. In December 1997, Soyland signed
a letter of intent to pay in advance the remainder of its base capacity  charges
in the PCA. The fee of  approximately  $70 million is deferred and recognized as
interchange  revenue  over the  initial  term of the PCA.  The  payment  will be
contingent on Soyland obtaining the necessary financing and regulatory approvals
in 1998.
<PAGE>

Note 7 - Income Taxes

Deferred tax assets and liabilities were comprised of the following:

                                                  Balances as of December 31,
(Millions of dollars)                                1997              1996

Deferred tax assets:
Current:
  Misc. book/tax recognition differences        $     11.2       $      7.7

Noncurrent:
  Depreciation and other property related             46.2             42.0
  Alternative minimum tax                            156.8            198.5
  Tax credit and net operating loss
    carryforward                                       -               32.8
  Unamortized investment tax credit                  116.9            120.9
  Misc. book/tax recognition differences              51.9             78.9

                                                     371.8            473.1

            Total deferred tax assets           $    383.0       $    480.8



Deferred tax liabilities:

Current:
  Misc. book/tax recognition differences        $       .9       $     11.3

Noncurrent:
  Depreciation and other property related          1,348.0          1,350.1
  Deferred Clinton costs                               -               58.2
  Misc. book/tax recognition differences              (7.1)            99.7

                                                   1,340.9          1,508.0

  Total deferred tax liabilities                $  1,341.8       $  1,519.3

Income taxes  included in the  Consolidated  Statements of Income consist of the
following components:

                                                     Years Ended December 31,
(Millions of dollars)               1997             1996              1995

Current taxes                    $   70.3        $   64.7            $   78.3

Deferred taxes-
  Property related differences        8.8            70.6                71.9
  Alternative minimum tax            41.7             1.1                 2.9
  Gain/loss on reacquired debt         .4            (1.6)               (1.9)
  Net operating loss
   carryforward                        -                -                 (.2)
  Enhanced retirement
   and severance                       .5             2.6               (15.0)
  Misc. book/tax recognition
   differences                      (34.1)           (2.2)              (15.1)
  Investment tax credit              (7.3)           (7.3)               (6.9)

   Total deferred taxes              10.0            63.2                35.7

Total income taxes from
  continuing operations          $   80.3        $  127.9            $  114.0

Income tax -
  Extraordinary item
    Current tax expense             (17.8)            -                    -
    Deferred tax expense           (100.2)            -                    -

    Total extraordinary item       (118.0)            -                    -

Total income taxes               $  (37.7)       $  127.9             $  114.0
<PAGE>

     The  reconciliations  of income tax expense to amounts computed by applying
the statutory tax rate to reported pretax income from continuing  operations for
the period are set below:

                                                        Years Ended December 31,

(Millions of dollars)                 1997             1996             1995

Income tax expense at the
  federal statutory tax rate $         64.7        $  111.4         $   92.9

Increases/(decreases) in taxes
resulting from-
  State taxes, 
    net of federal effect               8.7            11.4             12.4
  Investment tax credit
    amortization                       (7.3)           (7.3)            (6.9)
Depreciation not normalized            11.3             9.4              7.4
Preferred dividend requirement
  of subsidiary                         1.7             2.5              5.8

Other-net                               1.2              .5              2.4

Total income taxes from
  continuing operations             $  80.3        $  127.9         $  114.0



     Combined federal and state effective income tax rates were 43.4%, 40.2% and
42.9% for the years 1997, 1996 and 1995, respectively.

     Illinova  is subject  to the  provisions  of the  Alternative  Minimum  Tax
System. As a result, Illinova has an Alternative Minimum Tax credit carryforward
at December  31,  1997,  of  approximately  $156.8  million.  This credit can be
carried forward  indefinitely to offset future regular income tax liabilities in
excess of the tentative minimum tax.

     The  Internal  Revenue  Service is  currently  auditing  IP's  consolidated
federal  income tax returns for the years 1991 through 1993.  At this time,  the
outcome of the audit cannot be determined; however, the results of the audit are
not  expected  to have a  material  adverse  effect on  Illinova's  consolidated
financial position or results of operations.

     Because of the  passage of HB 362,  IP's  electric  generation  business no
longer  meets the criteria  for  application  of FAS 71. As required by FAS 101,
"Regulated  Enterprises - Accounting for the  Discontinuation  of Application of
FASB  Statement  No. 71," the income tax effects of the  write-off of regulatory
assets and  liabilities  related to electric  generation  are  reflected  in the
extraordinary  item  for  the  cumulative  effect  of  a  change  in  accounting
principle.

Note 8 - Capital Leases

The Fuel  Company,  which is 50% owned by IP, was formed in 1981 for the purpose
of leasing nuclear fuel to IP for Clinton.  Lease payments are equal to the Fuel
Company's   cost  of  fuel  as  consumed   (including   related   financing  and
administrative costs).  Billings under the lease agreement during 1997, 1996 and
1995 were $4  million,  $35  million and $41  million,  respectively,  including
financing costs of $4 million,  $5 million and $7 million,  respectively.  IP is
required to pay financing costs whether or not fuel is consumed. IP is obligated
to make  subordinated  loans to the Fuel Company at any time the  obligations of
the Fuel Company that are due and payable exceed the funds available to the Fuel
Company.  Lease terms stipulate that in the event that Clinton is out of service
for 24 consecutive  months,  IP will be obligated to purchase  Clinton's in-core
nuclear fuel for $62 million from the Fuel  Company.  IP has an  obligation  for
nuclear fuel disposal  costs of leased  nuclear fuel.  See "Note 4 - Commitments
and Contingencies"  for discussion of decommissioning  and nuclear fuel disposal
costs.  Nuclear fuel lease payments are included with "Fuel for electric plants"
on Illinova's Consolidated Statements of Income.

     At December 31, 1997 and 1996, current  obligations under capital lease for
nuclear fuel are $18.7 million and $36.9 million, respectively.

     Over the next five years  estimated  payments  under capital  leases are as
follows:

                                                         (Millions of dollars)

1998                                                            $        23.5
1999                                                                     44.3
2000                                                                     23.9
2001                                                                     21.5
2002                                                                     16.7
Thereafter                                                               12.8

                                                                        142.7

Less - Interest                                                          16.0

  Total                                                        $        126.7
<PAGE>



Note 9 - Long-Term Debt
<TABLE>

                                                                                                 (Millions of dollars)
December 31,                                                                                     1997             1996
<S>                                                                                      <C>               <C>    
First mortgage bonds of subsidiary-
  6 1/2%    series due 1999                                                               $      72.0       $     72.0
  6.60%     series due 2004 (Pollution Control Series A)                                          6.3              6.5
  7.95%     series due 2004                                                                      72.0             72.0
  6%        series due 2007 (Pollution Control Series B)                                         18.7             18.7
  7 5/8%    series due 2016 (Pollution Control Series F, G and H)                                 -              150.0
  8.30%     series due 2017 (Pollution Control Series I)                                         33.8             33.8
  7 3/8%    series due 2021 (Pollution Control Series J)                                         84.7             84.7
  8 3/4%    series due 2021                                                                      57.1             57.1
  5.70%     series due 2024 (Pollution Control Series K)                                         35.6             35.6
  7.40%     series due 2024 (Pollution Control Series L)                                         84.1             84.1
 
  Total first mortgage bonds of subsidiary                                                      464.3            614.5

New mortgage bonds of subsidiary-
  6 1/8%    series due 2000                                                                      40.0             40.0
  5.625%    series due 2000                                                                     110.0            110.0
  6 1/2%    series due 2003                                                                     100.0            100.0
  6 3/4%    series due 2005                                                                      70.0             70.0
  8%        series due 2023                                                                     229.0            229.0
  7 1/2%    series due 2025                                                                     177.0            177.0
  Adjustable rate series due 2028 (Pollution Control Series M, N and O)                         111.8            111.8
  Adjustable rate series due 2032 (Pollution Control Series P, Q and R)                         150.0              -

  Total new mortgage bonds of subsidiary                                                        987.8            837.8

  Total mortgage bonds of subsidiary                                                          1,452.1          1,452.3

Medium-term notes of subsidiary, series A                                                        68.0             78.5
Variable rate long-term debt of subsidiary due 2017                                              75.0             75.0
Illinova 7 1/8% Senior Notes due 2004                                                           100.0              -

  Total other long-term debt                                                                    243.0            153.5

                                                                                              1,695.1          1,605.8

Unamortized discount on debt                                                                    (16.8)           (18.1)
  Total long-term debt excluding capital lease obligations                                    1,678.3          1,587.7
  Obligations under capital leases of subsidiary                                                126.7             96.4

                                                                                              1,805.0          1,684.1

Long-term debt and lease obligations of subsidiary maturing within one year                     (87.5)           (47.7)

  Total long-term debt                                                                $       1,717.5     $     1,636.4
</TABLE>

In February 1997,  Illinova issued $100 million of 7 1/8% Senior Notes due 2004.
In April 1997, IP  refinanced  $150 million of 7 5/8% First  Mortgage  Bonds due
2016 as Adjustable Rate New Mortgage Bonds due 2032.

In 1989 and  1991,  IP  issued a series  of fixed  rate  medium-term  notes.  At
December 31, 1997,  these notes had interest  rates ranging from 9% to 9.31% and
will mature at various dates in 1998.  Interest rates on variable rate long-term
debt due 2017 are adjusted  weekly and ranged from 4.35% to 4.6% at December 31,
1997.

For the years 1998,  1999, 2000, 2001 and 2002, IP has long-term debt maturities
and cash sinking fund  requirements  in the  aggregate of (in  millions)  $68.8,
$72.8,  $150.8, $.8 and $.8,  respectively.  These amounts exclude capital lease
requirements. See "Note 8 - Capital Leases."

At December  31,  1997,  the  aggregate  total of  unamortized  debt expense and
unamortized loss on reacquired debt was approximately $50.4 million.

In 1992,  IP  executed a new  general  obligation  mortgage  (New  Mortgage)  to
replace, over time, IP's 1943 Mortgage and Deed of Trust (First Mortgage).  Both
mortgages  are  secured  by liens on  substantially  all of IP's  properties.  A
corresponding  issue of First Mortgage bonds, under the First Mortgage,  secures
any  bonds  issued  under  the New  Mortgage.  In  October  1997,  at a  special
bondholders  meeting,  the 1943  First  Mortgage  was  amended  to be  generally
consistent  with  the  New  Mortgage.  The  remaining  balance  of net  bondable
additions at December 31, 1997, was approximately $1.8 billion.
<PAGE>

Note 10 - Preferred Stock of Subsidiary
<TABLE>

                                                                                                              (Millions of dollars)
<S>                                                                                                      <C>                <C>    

December 31,                                                                                                  1997             1996

Serial Preferred Stock of Subsidiary, cumulative, $50 par value-
Authorized 5,000,000 shares; 1,139,110 and 1,221,700 shares outstanding, respectively

         Series   Shares   Redemption Prices
         4.08%    283,290  $        51.50                                                                 $   14.1          $  15.0
         4.26%    136,000           51.50                                                                      6.8              7.5
         4.70%    176,000           51.50                                                                      8.8             10.0
         4.42%    134,400           51.50                                                                      6.7              7.5
         4.20%    167,720           52.00                                                                      8.4              9.0
         7.75%    241,700           50.00 after July 1, 2003                                                  12.1             12.1

         Net premium on preferred stock                                                                         .2               .2

  Total Preferred Stock of Subsidiary, $50 par value                                                      $   57.1          $  61.3

Serial Preferred Stock of Subsidiary, cumulative, without par value-
Authorized 5,000,000 shares; 0 and 698,200 shares outstanding, respectively

         Series   Shares   Redemption Prices
         A            -            -                                                                      $    -            $  34.9

  Total Preferred Stock of Subsidiary, without par value                                                  $    -            $  34.9

Preference Stock of Subsidiary, cumulative, without par value-
Authorized 5,000,000 shares; none outstanding                                                                  -                -
  Total Serial Preferred Stock, Preference Stock and Preferred Securities of Subsidiary                   $   57.1          $  96.2

Company Obligated Mandatorily Redeemable Preferred Securities of:
Illinois Power Capital, L.P.
Monthly Income Preferred Securities, cumulative, $25 liquidation preference-
3,880,000 shares authorized and outstanding                                                               $   97.0          $  97.0

Illinois Power Financing I
Trust Originated Preferred Securities, cumulative, $25 liquidation preference-
4,000,000 shares authorized and outstanding                                                                  100.0            100.0

  Total Mandatorily Redeemable Preferred Stock of Subsidiary                                              $  197.0          $ 197.0
</TABLE>

Serial  Preferred  Stock  ($50 par value) is  redeemable  at the option of IP in
whole or in part at any time  with  not less  than 30 days and not more  than 60
days notice by publication. The MIPS are redeemable at the option in whole or in
part on or after October 6, 1999 with not less than 30 days and not more than 60
days  notice by  publication.  The TOPrS  mature on January  31, 2045 and may be
redeemed in whole or in part at any time on or after January 31, 2001.

Quarterly  dividend rates for Serial Preferred  Stock,  Series A, are determined
based on market interest rates of certain U.S.  Treasury  securities.  Dividends
paid in 1997 and 1996 were $.75 per share per quarter.

Illinois Power Capital,  L.P., is a limited  partnership in which IP serves as a
general   partner.   Illinois   Power  Capital  issued  (1994)  $97  million  of
tax-advantaged   MIPS  at  9.45%  (5.67%  after-tax  rate)  with  a  liquidation
preference  of $25 per share.  IP  consolidates  the accounts of Illinois  Power
Capital.

Illinois Power  Financing I is a statutory  business trust in which IP serves as
sponsor.  IPFI issued (1996) $100 million of TOPrS at 8% (4.8% after-tax  rate).
IP consolidates the accounts of IPFI.

On September  29, 1997,  IP issued a notice of  redemption to all holders of its
Adjustable Rate Series A Preferred  Stock.  All 698,200 shares  outstanding were
redeemed  on  November  1,  1997,  at the price of $50 per  share.  In 1997,  IP
redeemed $4.2 million of various issues of Serial  Preferred Stock. The carrying
amount was $.2 million  over  consideration  paid and was recorded in equity and
included in Net income applicable to common stock.
<PAGE>

Note 11 - Common Stock and Retained Earnings

In 1997, Illinova  repurchased  4,000,000 shares of its common stock on the open
market.  Illinova  holds the common stock as treasury  stock and deducts it from
common equity at the cost of the shares.

     In 1996,  Illinova  amended the Automatic  Reinvestment  and Stock Purchase
Plan and the ESOP.  These plans were replaced with the Illinova  Investment Plus
Plan for which  5,000,000  shares of common stock were  designated for issuance.
Illinova  administers the Illinova Investment Plus Plan. The Illinova Investment
Plus Plan provides investors a convenient way to purchase shares of common stock
and reinvest all or a portion of the cash dividends paid on eligible  securities
in additional shares of common stock. It allows purchases of common stock on the
open market,  as well as purchases of new issue shares  directly from  Illinova.
Under this plan,  4,608,712  shares of common stock were designated for issuance
at December  31,  1997.  All  accounts,  elections,  notices,  instructions  and
authorizations under the Automatic  Reinvestment and Stock Purchase Plan and the
ESOP  automatically  continue  under the  Illinova  Investment  Plus  Plan,  and
participants in the Automatic  Reinvestment and Stock Purchase Plan and the ESOP
continue as participants in the Illinova Investment Plus Plan.

     The  ESOP  includes  an  incentive  compensation  feature  which is tied to
employee achievement of specified corporate  performance goals. This arrangement
began in 1991 when IP loaned $35 million to the Trustee of the Plans, which used
the loan proceeds to purchase  2,031,445 shares of IP's common stock on the open
market.  The loan and common shares were converted to Illinova  instruments with
the  formation  of  Illinova  in May 1994.  These  shares are held in a suspense
account  under  the  plans  and  are  being   distributed  to  the  accounts  of
participating  employees  as the  loan  is  repaid  by the  Trustee  with  funds
contributed by IP,  together with dividends on the shares acquired with the loan
proceeds.  IP  financed  the loan with  funds  borrowed  under  its bank  credit
agreements.

     For the year ended  December 31, 1997,  91,282 common shares were allocated
to  salaried  employees  and  83,418  shares  to  employees  covered  under  the
Collective Bargaining Agreement through the matching contribution feature of the
ESOP arrangement. Under the incentive compensation feature, 70,720 common shares
were allocated to employees for the year ended  December 31, 1997.  During 1997,
IP contributed $5.0 million to the ESOP and using the shares  allocated  method,
recognized  $3.3  million  of  expense.  Interest  paid  on the  ESOP  debt  was
approximately  $1.3  million in 1997 and  dividends  used for debt  service were
approximately $2.3 million.

     In 1992,  the Board of Directors  adopted and the  shareholders  approved a
Long-Term  Incentive  Compensation  Plan (the  Plan) for  officers  or  employee
members of the Board, but excluding directors who are not officers or employees.
Restricted stock,  incentive stock options,  non-qualified stock options,  stock
appreciation  rights,  dividend  equivalents and other stock-based awards may be
granted under the plan, for up to 1,500,000  shares of Illinova's  common stock.
The following  table outlines the activity under this plan at December 31, 1997.
Of the options granted in 1992,  1993, 1994 and 1995 in the table below,  7,500,
10,500, 4,400 and 6,500 options,  respectively,  have been forfeited and are not
exercisable. An additional 20,000 options were exercised in January 1998.

Year             Options  Grant       Year       Expiration       Options
Granted          Granted  Price    Exercisable      Date         Exercised

1992              62,000  $23 3/8     1996         6/10/01        38,000
1993              73,500  $24 1/4     1997         6/09/02            - 
1994              82,650  $20 7/8     1997         6/08/03            -
1995              69,300  $24 7/8     1998         6/14/04            -
1996              80,500  $29 3/4     1999         2/07/05            -
1997              82,000  $26 1/8     2000         2/12/07            -



     In October 1995, the FASB issued FAS No. 123,  "Accounting  for Stock-Based
Compensation,"  effective for fiscal years  beginning  after  December 15, 1995.
Based on the current and anticipated use of stock options, the impact of FAS 123
is not material on the current  period and is not  envisioned  to be material in
any  future  period.  Illinova  continues  to account  for its stock  options in
accordance with Accounting Principle Board Opinion No. 25.

     The  provisions  of  Supplemental   Indentures  to  IP's  General  Mortgage
Indenture and Deed of Trust  contain  certain  restrictions  with respect to the
declaration  and  payment  of  dividends.  IP was not  limited  by any of  these
restrictions at December 31, 1997. Under the Restated Articles of Incorporation,
common stock dividends are subject to the preferential  rights of the holders of
preferred and preference stock.

Note 12 -  Pension and Other Benefit Costs

Illinova   offers  certain  benefit  plans  to  the  employees  of  all  of  its
subsidiaries. IP is sponsor and administrator of all of the benefit plans. IP is
reimbursed by the other Illinova subsidiaries for their share of the expenses of
the benefit plans. The discussion and values below represent the plans in total,
including the amounts attributable to the other subsidiaries.

     IP has  defined-benefit  pension plans covering all officers and employees.
Benefits are based on years of service and compensation.  IP's funding policy is
to  contribute  annually at least the  minimum  amount  required  by  government
funding  standards,  but not more than can be deducted  for  federal  income tax
purposes.
<PAGE>

     Pension costs, a portion of which have been  capitalized for 1997, 1996 and
1995, include the following components:

                                                  Years Ended December 31,

(Millions of dollars)               1997             1996              1995

Service cost on benefits
  earned during the year         $   10.1        $    10.2         $    10.4
Interest cost on projected
  benefit obligation                 27.9              26.8             23.6
Return on plan assets               (95.6)           (42.2)            (58.3)
Net amortization and deferral        61.5              9.4              29.6
Effect of enhanced retirement
  program                             -                -                15.7

Net periodic pension cost        $    3.9        $     4.2         $    21.0



The estimated  funded  status of the plans at December 31, 1997 and 1996,  using
discount rates of 7.5% and 8.0%, respectively, and future compensation increases
of 4.5% was as follows:

                                                   Balances as of December 31,
(Millions of dollars)                                1997              1996

Actuarial present value of:
  Vested benefit obligation                      $ (329.7)         $  (291.7)

  Accumulated benefit obligation                   (350.6)            (312.5)
Projected benefit obligation                       (412.8)            (361.5)
Plan assets at fair value                           432.1              357.2
  Funded status                                      19.3               (4.3)
  Unrecognized net (gain)/loss                      (39.1)             (13.8)
  Unrecognized net asset at transition              (26.1)             (30.3)
  Unrecognized prior service cost                    17.4               19.3
Accrued pension cost included in
  deferred credits                               $  (28.5)          $  (29.1)



     The  plans'  assets  consist  primarily  of  common  stocks,  fixed  income
securities,  cash  equivalents,  alternative  investments  and real estate.  The
actuarial  present  value of  accumulated  plan  benefits at January 1, 1997 and
1996,  were  $375  million  and $361  million,  respectively,  including  vested
benefits of $353 million and $337  million,  respectively.  The pension cost for
1997,  1996 and 1995 was  calculated  using a discount  rate of 8.0%,  7.75% and
8.75%,  respectively;  future compensation  increases of 4.5% for 1997, 1996 and
1995;  and a return on assets of 9.5% for 1997 and 1996,  and 9.0% for 1995. The
unrecognized net asset at transition and the unrecognized prior service cost are
amortized on a straight-line  basis over the average remaining service period of
employees  who are  expected to receive  benefits  under the plan.  IP made cash
contributions of $5 million in 1997, $6 million in 1996 and $2 million in 1995.

     IP provides  health  care and life  insurance  benefits to certain  retired
employees,  including their eligible  dependents,  who attain specified ages and
years of service under the terms of the  defined-benefit  plans.  Postretirement
benefits,  a portion of which have been capitalized,  for 1997 and 1996 included
the following components:

                                                     Years Ended December 31,
(Millions of dollars)                                 1997              1996

Service cost on benefits earned
  during the year                                    $  1.9           $  2.2
Interest cost on projected
  benefit obligation                                    5.9              6.1
Return on plan assets                                  (8.0)            (5.9)
Amortization of unrecognized
  transition obligation                                 7.4              6.4
Net periodic postretirement
  benefit cost                                       $  7.2           $  8.8



     The  net  periodic  postretirement  benefit  cost  in the  preceding  table
includes amortization of the previously unrecognized accumulated  postretirement
benefit  obligation,  which was $41.4 million and $44.2 million as of January 1,
1997 and 1996, respectively, over 20 years on a straight-line basis.

     IP has  established two separate trusts for those retirees who were subject
to a  collectively  bargained  agreement and all other  retirees to fund retiree
health care and life  insurance  benefits.  IP's funding policy is to contribute
annually an amount at least equal to the  revenues  collected  for the amount of
postretirement benefit costs allowed in rates. The plan assets consist of common
stocks and fixed income  securities at December 31, 1997 and 1996. The estimated
funded status of the plans at December 31, 1997 and 1996, using weighted average
discount  rates of 7.0% and 8.0%,  respectively,  and a return on assets of 9.0%
was as follows:

                                                    Balances as of December 31,
(Millions of dollars)                                1997              1996

Accumulated postretirement
benefit obligation
  Current retirees                                $ (51.1)          $ (49.6)
  Current employees - fully eligible                 (5.5)             (3.5)
  Current employees - not fully eligible            (32.8)            (28.6)
    Total benefit obligation                        (89.4)            (81.7)
Plan assets at fair value                            49.7              34.4
Funded status                                       (39.7)            (47.3)
Unrecognized transition obligation                   38.7              41.4
Unrecognized net (gain)/loss                         (6.3)             (7.1)
Accrued postretirement benefit cost
  included in deferred credits                    $  (7.3)          $ (13.0)



     The pre-65  health-care-cost  trend rate  decreases  from 7.1% to 5.5% over
nine years and the post-65  health-care-cost trend rate is level at 1.5%. A 1.0%
increase in each future year's assumed  health-care-cost  trend rates  increases
the  service  and  interest  cost  from $7.8  million  to $8.7  million  and the
accumulated  postretirement  benefit  obligation  from  $89.4  million  to $99.9
million.
<PAGE>

Note 13 - Segments of Business
<TABLE>
<S>                     <C>      <C> <C>         <C>         <C>       <C>   <C>        <C>       <C>      <C>     <C>    <C>

                                                                                                               (Millions of dollars)
                                     1997                                   1996                                        1995
                                       Diversified                            Diversified                         Diversified      
                                       Enterprises   Total                    Enterprises Total                   Enterprises Total
                         Electric  Gas               Corp.    Electric    Gas             Corp.    Electric   Gas             Corp.
Operation information -
 Operating revenues      $1,420.0 $353.9  $735.6   $2,509.5   $1,340.5   $348.2  $57.6  $1,746.3   $1,368.9  $272.5   $1.9  $1,643.3
 Operating expenses,
  excluding provision
  for income taxes        1,081.3  311.5   792.3    2,185.1      886.2    300.5   87.5   1,274.2      946.2   245.0   15.1   1,206.3

 Pre-tax operating income   338.7   42.4   (56.7)    324.4      454.3    47.7    (29.9)    472.1      422.7    27.5  (13.2)    437.0
 AFUDC                        4.9     .1       -       5.0        6.3      .2        -       6.5        5.5      .5      -       6.0

 Pre-tax operating income,
   including AFUDC        $ 343.6 $ 42.5  $(56.7)  $ 329.4   $  460.6   $47.9   $(29.9)  $ 478.6   $  428.2  $ 28.0  $(13.2) $ 443.0

 Other deductions, net                               (13.6)                                  2.6                                 5.1
 Interest charges                                    136.8                                 134.7                               148.6
 Provision for
   income taxes                                       80.3                                 128.0                               114.0
 Preferred dividend
   requirements
   of subsidiary                                      21.5                                  22.3                                23.7

 Net income                                          104.4                                 191.0                               151.6

 Extraordinary item
   (net of taxes)                                   (195.0)                                  -                                   -
 Carrying value over
   (under) consideration
   paid for redeemed
   preferred stock
   of subsidiary                                        .2                                   (.7)                              (3.5)

Net income (loss)
  applicable
  to common stock                                  $ (90.4)                               $190.3                             $ 148.1

Other information -
  Depreciation            $171.5  $24.1    $ -     $ 195.6     $164.0  $ 22.5   $ -       $186.5     $161.4  $ 21.6  $ -     $ 183.0
  Capital expenditures    $201.3  $22.6    $ -     $ 223.9     $164.0  $ 23.3   $ -       $187.3     $185.7  $ 23.6  $ -     $ 209.3

Investment information -
  Identifiable assets*  $4,508.1 $453.8    $1.2   $4,963.1   $4,578.1  $481.9   $ -     $5,060.0   $4,580.4  $446.3  $ -    $5,026.7

  Nonutility plant and
    other investments                                184.0                                132.4                                65.5
  Assets utilized for
    overall operations                               435.9                                520.4                               517.6

  Total assets                                    $5,583.0                             $5,712.8                            $5,609.8

</TABLE>
<PAGE>


Note 14 - Fair Value of Financial Instruments

                                        1997                   1996
                               Carrying     Fair       Carrying    Fair
(Millions of dollars)            Value      Value       Value      Value

Nuclear decommissioning
  trust funds               $     62.5 $     62.5 $     41.4 $     41.4

Cash and cash equivalents         33.0       33.0       24.6       24.6
Mandatorily redeemable
  preferred stock
  of subsidiary                  197.0      202.7      197.0      199.3
Long-term debt                 1,678.3    1,730.1    1,587.7    1,629.3
Notes payable                    415.3      415.3      387.0      387.0


     The following  methods and assumptions were used to estimate the fair value
of each class of financial instruments listed in the table above:

Nuclear  Decommissioning  Trust  Funds  The fair  values  of  available-for-sale
marketable  debt  securities  and  equity   investments   held  by  the  Nuclear
Decommissioning  Trust are based on quoted market  prices at the reporting  date
for those or similar investments.

Cash and Cash  Equivalents  The  carrying  amount  of cash and cash  equivalents
approximates fair value due to the short maturity of these instruments.

Mandatorily Redeemable Preferred Stock of Subsidiary and Long-Term Debt The fair
value of IP mandatorily  redeemable  preferred stock and Illinova (including IP)
long-term debt is estimated based on the quoted market prices for similar issues
or by discounting expected cash flows at the rates currently offered to Illinova
for debt of the same remaining maturities, as advised by Illinova's bankers.

Notes Payable The carrying amount of notes payable  approximates  fair value due
to the short maturity of these instruments.

Note 15 - Quarterly  Consolidated  Financial  Information  and Common Stock Data
(unaudited)
<TABLE>

                                                                          (Millions of dollars except per common share amounts)
<S>                                               <C>              <C>                     <C>                   <C>   
                                                  First Quarter    Second Quarter          Third Quarter         Fourth Quarter
                                                       1997              1997                 1997                  1997

Operating revenues                                   $ 570.4          $ 542.9               $ 841.8              $  554.4
Operating income (loss)                                114.4             95.1                 144.2                 (29.3)
Net income (loss) before extraordinary item             44.0             31.4                  63.3                 (34.3)  
Net income (loss) after extraordinary item              44.0             31.4                  63.3                (229.3)
Net income (loss) applicable to common stock            44.0             31.4                  64.4                (230.2)
Earnings (loss) per common share
  before extraordinary item (basic and diluted)      $    .58         $    .42              $    .87             $    (.46)
Earnings (loss) per common share
  after extraordinary item (basic and diluted)       $    .58         $    .42              $    .87             $   (3.09)
Common stock prices and dividends
  High                                               $ 27 1/2         $ 23 3/4              $ 23 3/4             $  27 3/16
  Low                                                $ 22 3/4         $ 20 1/8              $ 21 1/2             $  20 3/8
  Dividends declared                                 $    .31         $    .31              $    .31             $     .31



                                                  First Quarter   Second Quarter           Third Quarter        Fourth Quarter
                                                      1996              1996                   1996                  1996

Operating revenues (1)                             $  453.1          $  373.4               $  479.1             $    440.7
Operating income (1)                                  121.4              89.7                  189.6                   71.3
Net income                                             43.3              36.7                   91.0                   20.0
Net income applicable to common stock                  43.3              36.2                   90.7                   20.1
Earnings per common share (basic and diluted)     $      .57               .48              $    1.20            $       .26
Common stock prices and dividends
  High                                            $   30 3/8         $     29               $  29 1/4            $    28 5/8
  Low                                             $   27             $     24 5/8           $  25 1/4            $    26 1/4
  Dividends declared                              $     .28          $     .28              $    .28             $       .31
</TABLE>

(1) Amounts have been restated to conform with 1997 changes in income  statement
format.

Illinova  common stock is listed on the New York Stock  Exchange and the Chicago
Stock Exchange.  The stock prices above are the prices reported on the Composite
Tape. There were 35,123 registered holders of common stock at January 10, 1998.
<PAGE>

ILLINOVA CORPORATION

SELECTED CONSOLIDATED FINANCIAL DATA*
<TABLE>
<S>                                           <C>            <C>            <C>               <C>           <C>          <C>
                                                                                                              (Millions of dollars)

                                                     1997          1996             1995          1994         1993           1987
   

Operating revenues
  Electric                                     $    1,244.4   $    1,202.9  $    1,252.6      $1,177.5      $1,135.6     $    910.8
  Electric interchange                                175.6          137.6         116.3         110.0         130.8           92.4
  Gas                                                 353.9          348.2         272.5         302.0         314.8          308.7
  Diversified enterprises                             735.6           57.6           1.9           -             -              -
   Total operating revenues                    $    2,509.5   $    1,746.3  $    1,643.3      $1,589.5      $1,581.2     $  1,311.9

Extraordinary item net of income tax benefit   $     (195.0)  $        -       $     -        $    -        $    -       $      -
Net income (loss) after extraordinary item     $      (90.6)  $      191.0     $   151.6      $  151.8      $  (81.9)    $    251.9
Effective income tax rate                              43.4%          40.2%         42.9%         42.0%        (39.8)%         21.3%
Net income (loss) applicable to common stock   $      (90.4)  $      190.3     $   148.1      $  158.2      $  (81.9)    $    251.9
Earnings (loss) per common share
  (basic and diluted)                          $      (1.22)  $       2.51     $    1.96      $    2.09     $  (1.08)   $      3.75
Cash dividends declared per common share       $       1.24   $       1.15     $    1.03      $     .65     $    .40    $      2.64
Dividend payout ratio (declared)                       N/A           45.5%          52.3%         30.7%         N/A           70.9%
Book value per common share                    $      19.11   $      21.62     $    20.19     $   19.17     $  17.46    $     26.85
Price range of common shares
   High                                        $      27 1/2  $     30 3/8     $    30        $   22 5/8    $  25 7/8   $   31 1/2
   Low                                         $      20 1/8  $     24 5/8     $    21 1/4    $   18 1/8    $  20 1/8   $   21 1/4
Weighted average number of common shares
  outstanding during the period (thousands)          73,992         75,682          75,644        75,644      75,644         67,251

  Total assets                                 $    5,583.0   $     5,712.8    $ 5,609.8      $  5,576.7    $ 5,423.5   $   5,922.7

Capitalization
  Common stock equity                          $    1,369.5   $    1,636.2     $ 1,527.0      $  1,450.2    $ 1,321.0   $   1,841.4
  Preferred stock of subsidiary                        57.1           96.2         125.6           224.7        303.7         315.2
  Mandatorily redeemable
   preferred stock of subsidiary                      197.0          197.0          97.0           133.0         48.0         160.0
  Long-term debt                                    1,717.5        1,636.4       1,739.3         1,946.1      1,926.3       2,279.2

  Total capitalization                         $    3,341.1   $    3,565.8     $ 3,488.9      $  3,754.0    $ 3,599.0   $   4,595.8

Retained earnings (deficit)                    $       51.7   $      233.0     $   129.6      $     58.8    $   (64.6)  $     554.8

Capital expenditures                           $      223.9   $      187.3     $   209.3      $    193.7    $   277.7   $     263.5
Cash flows from operations                     $      368.4   $      407.4     $   413.2      $    268.6    $   369.7   $     232.3
AFUDC as a percent of earnings
  applicable to common stock                           N/A             3.4%         4.1%             5.9%       N/A            80.2%
Return on average common equity                        (6.0)%         12.0%         9.9%            11.4%       (6.0)%         14.3%
Ratio of earnings to fixed charges                       .93           3.07         2.56             2.56         .66           2.51
</TABLE>

* Millions of dollars except  earnings  (loss) per common share,  cash dividends
declared per common share, book value per common share and price range of common
shares.
<PAGE>

ILLINOVA CORPORATION

SELECTED ILLINOIS POWER COMPANY STATISTICS
<TABLE>
<S>                                                   <C>        <C>          <C>       <C>         <C>        <C>

                                                         1997      1996        1995       1994       1993      1987

Electric Sales in KWH (Millions)

Residential                                             4,734      4,782      4,754      4,537      4,546      4,241
Commercial                                              3,943      3,894      3,804      3,517      3,246      2,862
Industrial                                              8,403      8,493      8,670      8,685      8,120      7,323
Other                                                     426        367        367        536        337        910

  Sales to ultimate consumers                          17,506     17,536     17,595     17,275     16,249     15,336

Interchange                                             7,230      5,454      4,444      4,837      6,015      3,682
Wheeling                                                3,253        928        642        622        569          -
  Total electric sales                                 27,989     23,918     22,681     22,734     22,833     19,018

Electric Revenues (Millions)

Residential                                          $    489   $    483   $    500   $    471   $    463   $    352
Commercial                                                325        318        321        295        269        209
Industrial                                                376        360        392        378        360        325
Other                                                      40         38         37         30         40         25

  Revenues from ultimate consumers                      1,230      1,199      1,250      1,174      1,132        911

Interchange                                               176        138        116        110        131         92
Wheeling                                                   14          4          3          3          3          -

  Total electric revenues                            $  1,420   $  1,341   $  1,369   $  1,287   $  1,266   $  1,003

Gas Sales in Therms (Millions)

Residential                                               343        427        356        359        371        332
Commercial                                                147        177        144        144        148        137
Industrial                                                 47         99         88         81         78         96

  Sales to ultimate consumers                             537        703        588        584        597        565

Transportation of customer-owned gas                      309        251        273        262        229        327

  Total gas sold and transported                          846        954        861        846        826        892

Interdepartmental sales                                    19          9         21          5          7          5

  Total gas delivered                                     865        963        882        851        833        897

Gas Revenues (Millions)
Residential                                          $    238   $    216   $    173   $    192   $    200   $    192
Commercial                                                 77         79         60         66         68         66
Industrial                                                 20         40         24         31         34         35

  Revenues from ultimate consumers                        335        335        257        289        302        293

Transportation of customer-owned gas                        9          7          8          9          8         15
Miscellaneous                                              10          6          7          4          5          2

  Total gas revenues                                 $    354   $    348   $    272   $    302   $    315   $    310

System peak demand (native load) in kw (thousands)      3,532      3,492      3,667      3,395      3,415      3,083
Firm peak demand (native load) in kw (thousands)        3,469      3,381      3,576      3,232      3,254      2,923
Net generating capability in kw (thousands)             3,289      4,148      3,862      4,121      4,045      3,400

Electric customers (end of year)                      580,257    549,957    529,966     553,86    554,270    542,848
Gas customers (end of year)                           405,710    389,223    374,299    388,170    394,379    384,091
Employees (end of year)                                 3,655      3,635      3,559      4,350      4,540      4,616
</TABLE>

500 south 27th street, decatur, illinois 62521 n http://www.illinova.com

unlocking the power 1997

This entire report is printed on recycled paper


1997 INFORMATION STATEMENT AND ANNUAL REPORT TO SHAREHOLDERS
UNLOCKING THE POWER 1997

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS
Information Statement Table of Contents

Notice of Annual Meeting                                         2
Information Statement                                            3
Appendix: 1997 Annual Report to Shareholders                   a-1


To the Shareholders of Illinois Power:
Notice is Hereby Given that the Annual Meeting of Shareholders of Illinois Power
Company  ("Illinois  Power")  will be at 10 a.m.  Wednesday,  April 8, 1998,  at
Shilling Community  Education Center,  Richland  Community College,  One College
Park, Decatur, Illinois 62521, for the following purposes:

     (1) To elect the Board of Directors for the ensuing year.


     (2)  To transact  any other  business  which may  properly  come before the
          meeting or any adjournment.

     Shareholders  of record at the close of business on February 9, 1998,  will
be entitled to receive notice of and to vote at the Annual Meeting.

By Order of the Board of Directors,

Leah Manning Stetzner,
Vice President, General Counsel and Corporate Secretary

Decatur, Illinois
March 10, 1998

IMPORTANT
Only  shareholders  of Illinois Power are entitled to attend the Annual Meeting.
Shareholders  will be admitted on  verification of record share ownership at the
admission  desk.  Shareholders  who own shares through banks,  brokerage  firms,
nominees or other account  custodians  must present  proof of  beneficial  share
ownership (such as a brokerage  account  statement) at the admission desk.
<PAGE>

INFORMATION STATEMENT

March 10, 1998
(Date  first sent or given to  security  holders)

We are not asking you for a proxy and you are  requested not to send us a proxy.

This Information Statement is furnished in connection with the Annual Meeting of
Shareholders  of  Illinois  Power.  The Annual  Meeting  will be held at 10 a.m.
Wednesday,  April 8, 1998,  at Shilling  Community  Education  Center,  Richland
Community College,  One College Park, Decatur,  Illinois 62521, for the purposes
set forth in the accompanying Notice of Annual Meeting of Shareholders.

     On February 9, 1998  ("Record  Date"),  Illinova  Corporation  ("Illinova")
beneficially  owned all of the 66,215,292  shares of Illinois Power Common Stock
then  outstanding  and there were 1,139,110  shares of Illinois Power  Preferred
Stock then outstanding, none of which was held by Illinova.

Voting Rights 
Shareholders  of record  at the close of  business  on the  Record  Date will be
entitled to receive  notice of and to vote at the Annual  Meeting.  Shareholders
who are  present at the Annual  Meeting  will be  entitled  to one vote for each
share of Illinois Power Stock which they held of record at the close of business
on the Record Date.

     When  voting  for   candidates   nominated  to  serve  as  directors,   all
shareholders  will be  entitled  to 11 votes  (the  number  of  directors  to be
elected)  for each of their  shares and may cast all of their  votes for any one
candidate  whose name has been  placed in  nomination  prior to the  voting,  or
distribute  their votes among two or more such candidates in such proportions as
they determine.  In voting on other matters  presented for  consideration at the
Annual Meeting,  each shareholder will be entitled to one vote for each share of
Stock held of record at the close of business on the Record Date.

Annual Report
and Information Statement
Accompanying this Information  Statement,  which includes Consolidated Financial
Statements, is a Notice of Annual Meeting of Shareholders and the Summary Annual
Report to Shareholders  covering  operations of Illinova for the year 1997. This
Information  Statement  and  accompanying  documents  are first being  mailed to
shareholders  on or  about  March  10,  1998. 
<PAGE>

Board  of  Directors  
Information Regarding the Board of Directors
The Board of Directors held 10 Board meetings in 1997.  Other than Mr.  Adorjan,
who joined the Board in August 1997,  and Mr. Berry,  who retired from the Board
December 1, 1997, all directors  attended at least 75% of the aggregate meetings
of the Board and  Committees of which they were members  during 1997.  The Board
has four standing committees:  the Audit Committee,  the Finance Committee,  the
Compensation and Nominating Committee and the Nuclear Operations Committee.

     The duties and members of the standing committees are:

Audit  Committee 
(1) Review with the  Chairman,  President  and Chief  Executive  Officer and the
independent  accountants  the scope and adequacy of Illinois  Power's  system of
internal  controls;  (2) review the scope and results of the annual  examination
performed by the independent accountants;  (3) review the activities of Illinois
Power's  internal  auditors;  (4) report its findings to the Board and provide a
line of communication  between the Board and both the internal  auditors and the
independent  accountants;  and (5) recommend to the Board the appointment of the
independent   accountants  and  approval  of  the  services   performed  by  the
independent accountants, considering their independence with regard thereto.

     The Audit Committee met three times during 1997.

     This Committee consists of the following  non-employee  directors ("Outside
Directors"):  Robert M. Powers, Chairman,  Richard R. Berry, C. Steven McMillan,
Sheli Z. Rosenberg, Walter M. Vannoy, and Marilou von Ferstel.

Finance Committee
(1) Review  management's cash flow forecasts,  financial forecasts and financing
program,  and make  recommendations  to the Board regarding the approval of such
plans; (2) review Illinois Power's banking  relationships,  short-term borrowing
arrangements,  dividend  policies,  arrangements  with the  transfer  agent  and
registrar, investment objectives and the performance of Illinois Power's pension
and other trust funds,  evaluate fund managers,  and make recommendations to the
Board  concerning  such matters;  (3) review  Illinois  Power's risk  management
programs,  including insurance coverage,  and make recommendations to the Board;
and (4) act in an advisory capacity to management,  the Board of Directors,  and
the Chairman,  President and Chief Executive  Officer on other financial matters
as they may arise.  

     The Finance Committee met three times during 1997.

     This Committee  consists of the following  members of the Board:  Walter D.
Scott,  Chairman,  J. Joe Adorjan,  Richard R. Berry,  Larry D. Haab,  C. Steven
McMillan, Sheli Z. Rosenberg, Marilou von Ferstel, and John D. Zeglis.

Compensation and Nominating  Committee 
(1) Review  performance and recommend  salaries plus other forms of compensation
of  elected  Illinois  Power  officers  and the Board of  Directors;  (2) review
Illinois  Power's  benefit  plans  for  elected   Illinova   officers  and  make
recommendations to the Board regarding any changes deemed necessary;  (3) review
with the Chairman,  President and Chief Executive Officer any  organizational or
other  personnel  matters;  and (4) recommend to the Board nominees to stand for
election as director to fill vacancies in the Board of Directors as they occur.

     The  Compensation  and  Nominating  Committee  will consider  shareholders'
recommendations  for  nominees for director  made  pursuant to timely  notice in
writing  addressed to the Chairman of the Committee at the executive  offices of
Illinois  Power.  The  recommendation  should include a full  description of the
qualifications and business and professional experience of the proposed nominees
and a statement of the nominees'  willingness to serve. To be timely, the notice
must be delivered to or mailed and received at the executive offices of Illinois
Power not less than 90 nor more than 120 days prior to the Annual Meeting.

     The Compensation and Nominating Committee met four times during 1997.

     This  Committee  consists of the  following  Outside  Directors:  Ronald L.
Thompson, Chairman, J. Joe Adorjan, C. Steven McMillan, Robert M. Powers, Walter
D. Scott, Marilou von Ferstel, and John D. Zeglis.

Nuclear Operations Committee 
(1) Review the safety, reliability and quality of nuclear operations; (2) review
the  effectiveness  of the  management  of  nuclear  operations;  (3) review the
strategic plan for nuclear operations;  (4) review various nuclear reports;  and
(5) report its findings to the Board.

     The Nuclear Operations Committee met four times during 1997.

     This Committee  consists of the following  members of the Board:  Walter M.
Vannoy,  Chairman,  Richard R. Berry, Larry D. Haab, Robert M. Powers, Walter D.
Scott, and Ronald L. Thompson.
<PAGE>

Board  Compensation  
The Outside  Directors of Illinois Power, all of whom also serve on the Board of
Illinova,  receive a total retainer fee of $18,000 per year for their service on
these  boards.  Outside  Directors  who also chair Board  Committees  receive an
additional  $2,000,  increased in February  1998 to $2,500,  per year  retainer.
Outside  Directors receive a grant of 650 shares of Illinova Common Stock on the
date  of each  Annual  Shareholders  Meeting,  representing  payment  in lieu of
attendance-based fees for all Board and Committee meetings to be held during the
subsequent  one-year  period.  Outside  Directors  elected to the Board  between
Annual Shareholders  Meetings are paid $850 for each Board and Committee meeting
attended prior to the first Annual Shareholders  Meeting after their election to
the Board.

     Illinova had a Retirement Plan for Outside Directors. Under this plan, each
Outside  Director who attained age 65 and served on the Board for a period of 60
or more consecutive  months was eligible for annual  retirement  benefits at the
rate of the annual  retainer fee in effect when the director  retired.  In 1996,
the Board of Directors  adopted a Comprehensive  Deferred Stock Plan for Outside
Directors,  replacing the Retirement  Plan.  Each former Outside  Director whose
right to receive the  retirement  benefit had vested  continues  to receive such
benefits  in  accordance  with the terms of the  Retirement  Plan.  All  Outside
Directors  serving at the time this new plan was adopted were granted a lump sum
amount based on the net present  value of these  benefits to them,  were they to
have retired under the Retirement  Plan,  based on the number of years they have
served on the Board but not to exceed 10. This dollar amount was converted  into
stock units, based on the then market value of Illinova Common Stock, and placed
into an  account.  The  value  of  these  stock  units  is to be paid out to the
director in cash on  termination  of service,  based on the then market value of
Illinova Common Stock, plus dividend equivalents, in a lump sum or installments.
In  addition,  each  Outside  Director  receives an annual  award of stock units
having  a  value  of  $6,000,  to be  paid to the  Outside  Director  in cash on
retirement,  at once or in  installments  as the  Director  may elect,  with the
amount of such payment  determined by  multiplying  the number of stock units in
the account times the then market value of Illinova Common Stock, and adding the
dividend equivalents attributable to such stock units.

     Pursuant to Illinova's Deferred  Compensation  Plan for Certain  Directors,
Outside  Directors  of  Illinois  Power may elect to defer all or any portion of
their fees and stock grants until  termination  of their  services as directors.
Such deferred  amounts are  converted  into stock units  representing  shares of
Illinova  Common  Stock  with the  value of each  stock  unit  based on the last
reported  sales  price  of  such  stock.  Additional  credits  are  made  to the
participating  director's  account in dollar amounts equal to the dividends paid
on the Common Stock which the director  would have  received if the director had
been the  record  owner of the  shares  represented  by stock  units,  and these
amounts are  converted  into  additional  stock  units.  On  termination  of the
participating directors'  services as directors,  payment of their deferred fees
and stock grants was made in shares of Illinova  Common Stock in an amount equal
to the aggregate number of stock units credited to their accounts.  The plan was
amended  in 1997 to  provide  for a payout in cash  instead  of shares of Common
Stock. Deferred amounts are still converted into stock units representing shares
of Common  Stock with the value of each  stock  unit based on the last  reported
sales  price  of  such  stock.  Payment  is  made  in  cash,  in a  lump  sum or
installments,  as soon as practical following a director's termination. The cash
paid on  termination  equals the number of stock  units times the share price at
the close of market on the last business day of the month preceding termination.
No other payments are made after service on the Board ceases.


Election of Directors  
Illinois  Power's entire Board of Directors is elected at each Annual Meeting of
Shareholders.   Directors   hold  office  until  the  next  Annual   Meeting  of
Shareholders or until their successors are elected and qualified.  At the Annual
Meeting a vote will be taken on a proposal to elect the 11  directors  nominated
by  Illinois  Power's  Board of  Directors.  The  names and  certain  additional
information  concerning  each  of the  director  nominees  is set  forth  on the
following  pages.  If any nominee  should  become unable to serve as a director,
another  nominee may be selected by the current  Board of  Directors.  Walter M.
Vannoy  normally  would have not been eligible for election as a director at the
Annual  Meeting of  Shareholders  pursuant to a Bylaw  provision  which mandates
retirement from Board service at age 70. Because there is a current need for his
nuclear expertise,  the Board of Directors has elected to waive this requirement
in Mr. Vannoy's case, and he has agreed to serve if elected.
<PAGE>

BOARD OF DIRECTORS

Name of Director Nominee, Age,                               Year in Which First
Business Experience and                                       Elected a Director
Other Information                                              of Illinois Power

J. Joe Adorjan, 59                                                          1997
Chairman  and Chief  Executive  Officer  of  Borg-Warner  Security  Corporation,
Chicago, Ill., a security systems services firm, since 1995. He was President of
Emerson  Electric  Company from 1993 to 1995. Prior to that, he was Chairman and
Chief Executive Officer of ESCO Electronics Corporation. He is a director of The
Earthgrains  Company,  ESCO Electronics  Corporation and Goss Graphics  Systems,
Inc. 

Larry D. Haab, 60                                                           1986
Chairman,  President,  and Chief  Executive  Officer of Illinova  since December
1993,  and of Illinois  Power since June 1991, and an employee of Illinois Power
since  1965.  He is a director  of First  Decatur  Bancshares,  Inc.;  The First
National Bank of Decatur; and Firstech, Incorporated.

C. Steven McMillan, 52                                                      1996
President,  Chief  Operating  Officer,  and  Director  of Sara Lee  Corporation,
Chicago, Ill., a global packaged food and consumer products company, since 1997.
He was  Executive  Vice  President of Sara Lee from 1993 to 1997 and Senior Vice
President-Strategy Development from 1986 to 1993. He is Chairman of the Board of
Electrolux Corporation.

Robert M. Powers, 66                                                        1984
From 1980 until  retirement in December 1988, Mr. Powers was President and Chief
Executive  Officer of A. E.  Staley  Manufacturing  Company,  Decatur,  Ill.,  a
processor of grain and oil seeds. He is a director of A. E. Staley Manufacturing
Company.

Sheli Z. Rosenberg, 56                                                      1997
President and Chief  Executive  Officer  since 1994 and General  Counsel 1980 to
1994 of Equity Group Investments, Inc., Chicago, Ill., a privately held business
conglomerate holding controlling  interests in nine publicly traded corporations
involved in basic manufacturing,  radio stations,  retail,  insurance,  and real
estate.  She is a director of American  Classic  Voyages  Company;  Quality Food
Centers, Inc.; Jacor Communications,  Inc.; Anixter International , Inc.; Equity
Office Properties Trust;  Equity Residential  Properties Trust; CVS Corporation;
and Manufactured Home Communities, Inc.

Walter D. Scott, 66                                                         1990
Professor of Management and Senior Austin Fellow,  J. L. Kellogg Graduate School
of  Management,  Northwestern  University,  Evanston,  Ill.,  since 1988. He was
Chairman of GrandMet  USA from 1984 to 1986 and  President  and Chief  Executive
Officer of IDS Financial Services from 1980 to 1984. He is a director of Chicago
Title and Trust Company, Chicago Title Insurance Company,  Neodesic Corporation,
Orval Kent Holding Company, Inc., and Intermatic Incorporated.

Joe J. Stewart, 59 
President of BWX  Technologies,  Inc.,  formerly The Babcock & Wilcox Government
Group, Lynchburg,  Va., a diversified energy equipment and services company, and
Executive  Vice  President  of  McDermott  International,  Inc.  (parent  of BWX
Technologies,  Inc.  and The  Babcock  & Wilcox  Company),  since  1995.  He was
President  and Chief  Operating  Officer  of The  Babcock & Wilcox  Company  and
Executive Vice President of McDermott International, Inc., from 1993 to 1995 and
Executive Vice President of the Power  Generation  Group of The Babcock & Wilcox
Company from 1987 to 1993.
<PAGE>

Ronald L. Thompson, 48                                                      1991
Chairman and Chief Executive Officer of Midwest Stamping and Manufacturing  Co.,
Bowling Green,  Ohio, a  manufacturer  of automotive  parts,  since 1993. He was
President and Chief Executive Officer and a director of The GR Group,  Inc., St.
Louis,  Mo.,  from 1980 to 1993.  He is a director  of  Teachers  Insurance  and
Annuity Association, and Ryerson Tull.

Walter M. Vannoy, 70                                                        1990
Chairman until retirement in May 1995 and Chief Executive  Officer from May 1994
until  January  1995  of  Figgie  International,   Inc.,  Willoughby,   Ohio,  a
diversified  operating  company serving  consumer,  industrial,  technical,  and
service  markets  world-wide.  From  1980  to 1988 he was  President  and  Chief
Operating Officer,  The Babcock & Wilcox Company, and Vice Chairman of McDermott
International, Inc.

Marilou von Ferstel, 60                                                     1990
Executive Vice President and General Manager of Ogilvy Adams & Rinehart, Inc., a
public relations firm in Chicago, Ill., from June 1990 until retirement in April
1997. She was Managing  Director and Senior Vice President of Hill and Knowlton,
Chicago, Ill., from 1981 to 1990. She is a director of Walgreen Company.

John D. Zeglis, 50                                                          1993
President of AT&T,  Basking Ridge, N.J., a diversified  communications  company,
since October 1997. He was Vice Chairman from June 1997 to October 1997,  Senior
Executive Vice President and General Counsel,  from 1995 to June 1997 and Senior
Vice President - General Counsel and Government Affairs from 1989 to 1995. He is
a director of the Helmerich & Payne Corporation.

Security  Ownership of Management
and Certain  Beneficial Owners 
The table below shows shares of Illinova Common Stock  beneficially  owned as of
January 31, 1998, by each director  nominee and executive  officers named in the
Summary  Compensation  Table.  All of Illinois  Power's Common Stock is owned by
Illinova. To the best of Illinois Power's knowledge,  no owner holds more than 5
percent of Illinois Power Preferred Stock.

                                     Number      Number of Stock
                                     of Shares   Units in Deferred
  Name of                          Beneficially    Compensation        Percent
Beneficial Owner                   Owned (1)(2)       Plans           of Class
J. Joe Adorjan                               0           0               (3)   
Larry D. Haab                           68,250           0               (3)   
C. Steven McMillan                       1,300         289               (3)   
Robert M. Powers                         8,550         289               (3)   
Sheli Z. Rosenberg                           0       1,539               (3)   
Walter D. Scott                          5,150         289               (3)   
Joe J. Stewart                               0           0               (3)   
Ronald L. Thompson                       3,677       3,275               (3)   
Walter M. Vannoy                         5,010         289               (3)   
Marilou von Ferstel                      4,420       1,603               (3)   
John D. Zeglis                           2,626       1,603               (3)   
Paul L. Lang                            21,216           0               (3)   
Larry F. Altenbaumer                    13,092           0               (3)   
John G. Cook                            11,894           0               (3)   
David W. Butts                           8,817           0               (3)   

     (1)  With sole voting and/or investment power.

     (2)  Includes  the  following  shares  issuable  pursuant to stock  options
          exercisable March 31, 1998: Mr. Haab,  56,900;  Mr. Lang,  17,800; Mr.
          Altenbaumer,  17,800;  Mr. Cook,  9,900; and Mr. Butts,  7,900. 

     (3)  No director or executive  officer owns any other equity  securities of
          Illinova or as much as 1% of the Common Stock.  As a group,  directors
          and  executive  officers of Illinova  and  Illinois  Power own 187,021
          shares of Common Stock (less than 1%).
<PAGE>

Executive  Compensation  
The  following  table  sets  forth a summary  of the  compensation  of the Chief
Executive Officer and the four other most highly compensated  executive officers
of Illinois Power for the years indicated.  The compensation  shown includes all
compensation paid for service to Illinois Power, its parent and subsidiaries.
<TABLE>

                                         Summary Compensation Table
                                                                                      Long-Term Compensation
                                          Annual Compensation                         Awards
                                                               Other       Restricted     Securities      All Other
                                                   Bonus       Annual      Stock Awards   Underlying    Compensation
Name and Principal Position     Year    Salary      (1)    Compensation       (2)           Options          (3)
<S>                             <C>    <C>        <C>        <C>           <C>             <C>             <C>      
Larry D. Haab                   1997   $514,952   $ 41,840   $ 16,557      $ 41,840        20,000 shs.     $   2,614
  Chairman, President and       1996    493,709     69,267     15,973        69,267        22,000 shs.         2,615
  Chief Executive Officer of    1995    472,250     91,144     19,088        91,144        20,000 shs.         2,550
  Illinova and Illinois Power

Paul L. Lang                    1997   $242,325   $ 10,602   $  8,305      $ 10,601         6,500 shs.      $  2,615
  Senior Vice President         1996    233,450     19,747      8,863        19,747         6,500 shs.         2,595
  of Illinois Power             1995    222,812     23,841      8,265        23,841         6,500 shs.         2,510

Larry F. Altenbaumer            1997   $232,048   $  8,992   $  9,521      $  8,992        6,500 shs.       $  1,985
  Chief Financial Officer,      1996    222,374     19,832      8,459        19,832        7,500 shs.          1,976
  Treasurer and Controller      1995    204,937     20,391      7,686        20,391        6,500 shs.          2,378
  of Illinova, and Senior
  Vice President and Chief
  Financial Officer of
  Illinois Power

John G. Cook                    1997   $203,413    $    -    $  7,642      $     -         6,000 shs.       $  2,575
  Senior Vice President         1996    196,474     16,293      7,409        16,293        6,500 shs.          2,575
  and former Chief Nuclear      1995    179,069     16,620      6,930        16,620        4,500 shs.          2,530
  Officer of Illinois Power

David W. Butts                  1997   $188,227   $  7,529   $  7,185      $  7,529        6,000 shs.       $  2,595
  President of Illinova         1996    181,402     17,314      7,350        17,314        6,500 shs.          2,595
  Energy Partners, formerly     1995    153,333     18,132      6,990        18,132        5,000 shs.          2,540
  Senior Vice President of
  Illinois Power
</TABLE>


     (1)  The amounts  shown in this column are the cash award portion of grants
          made to these individuals under the Executive  Incentive  Compensation
          Plan ("Compensation  Plan") for 1997, including amounts deferred under
          the Executive  Deferred  Compensation  Plan. See the Compensation Plan
          description in footnote (2) below.

     (2)  This  table  sets  forth   stock  unit   awards  for  1997  under  the
          Compensation  Plan.  One-half of each year's  award under this plan is
          converted  into stock units  representing  shares of  Illinova  Common
          Stock based on the closing  price of Common  Stock on the last trading
          day of the award year.  The other one-half of the award is cash and is
          included under Bonus in the Summary  Compensation  Table.  Stock units
          awarded  in  a  given  year,   together  with  cash  representing  the
          accumulated  dividend  equivalents on those stock units,  become fully
          vested after a three-year  holding  period.  Stock units are converted
          into cash  based on the  closing  price of  Common  Stock on the first
          trading day of the distribution  year.  Participants (or beneficiaries
          of deceased participants) whose employment is terminated by retirement
          on or after age 55, disability,  or death receive the present value of
          all unpaid awards on the date of such termination.  Participants whose
          employment   is  terminated   for  reasons   other  than   retirement,
          disability,  or death forfeit all unvested  awards.  In the event of a
          termination  of employment  within two years after a change in control
          of  Illinova,  without  good  cause or by any  participant  with  good
          reason, all awards of the participant become fully vested and payable.
          As of December 31, 1997,  named executive  officers were credited with
          the following total aggregate number of unvested stock units under the
          Compensation  Plan  since  its  inception,  valued on the basis of the
          closing  price of Common Stock on December 31, 1997:  Mr. Haab,  7,619
          units valued at $205,241; Mr. Lang, 2,044 units valued at $55,071; Mr.
          Altenbaumer,  1,862 units  valued at $50,151;  Mr.  Cook,  1,250 units
          valued at $33,685; Mr. Butts, 1,626 units valued at $43,787.  Although
          stock  units  have been  rounded,  valuation  is based on total  stock
          units, including partial shares.

     (3)  The amounts  shown in this column are Illinois  Power's  contributions
          under the Incentive Savings Plan (including the market value of shares
          of Illinova Common Stock at the time of allocation).
<PAGE>

     The following  tables  summarize  grants during 1997 of stock options under
Illinova's  1992  Long-Term  Incentive  Compensation  Plan  ("LTIC")  and awards
outstanding at year end for the  individuals  named in the Summary  Compensation
Table.
<TABLE>
<S>                   <C>                       <C>                    <C>                     <C>                 <C>    
           
                                         Option Grants In 1997
                                    Individual Grants
                       Number of Securities     % of Total Options
                        Underlying Options      Granted to Employees    Exercise or Base                                Grant Date
                        Granted (1)                   in 1997            Price Per Share (1)   Expiration Date     Present Value (2)
Larry D. Haab            20,000                         24%                 $26.125                2/12/2007             $107,200

Paul L. Lang              6,500                          8%                  26.125                2/12/2007               34,840

Larry F. Altenbaumer      6,500                          8%                  26.125                2/12/2007               34,840

John G. Cook              6,000                          7%                  26.125                2/12/2007               32,160
 
David W. Butts            6,000                          7%                  26.125                2/12/2007               32,160
</TABLE>


     (1)  Each option  becomes  exercisable on February 12, 2000. In addition to
          the  specified  expiration  date,  the  grant  expires  on  the  first
          anniversary of the recipient's  death and/or five years following date
          of  retirement,  and is not  exercisable  in the  event a  recipient's
          employment  terminates.  In the  event  of  certain  change-in-control
          circumstances,  the Compensation and Nominating  Committee may declare
          the option immediately exercisable.  The exercise price of each option
          is equal to the fair market  value of the Common  Stock on the date of
          the grant. Recipients shall also receive, on or shortly after February
          12, 2000, a target  performance  award,  determined by calculating the
          difference  between  the return  earned by  Illinova  on its  invested
          capital and its cost of capital (the  "spread"),  then  comparing this
          spread to that of a peer group and reducing or  increasing  the target
          award depending on Illinova's relative  performance,  but not reducing
          the payment  below zero.  The target award is equal to one-half of the
          mid-point  of  compensation   for  each  officer's   salary  grade  (a
          market-based   number)   times  a   percentage,   determined   by  the
          Compensation  and  Nominating  Committee.  In 1997  those  percentages
          ranged  between 20 and 45 percent.  At the  discretion of the Board of
          Directors,  the foregoing  payment may be made in the form of Illinova
          Common Stock of  equivalent  value based on the average New York Stock
          Exchange price of the stock during February 2000, or in cash.

     (2)  The  Grant  Date  Present   Value  has  been   calculated   using  the
          Black-Scholes  option  pricing  model.  Disclosure  of the Grant  Date
          Present  Value,  or the  potential  realizable  value of option grants
          assuming  5%  and  10%  annualized   growth  rates,   is  mandated  by
          regulation;   however,   Illinova  does  not   necessarily   view  the
          Black-Scholes  pricing methodology,  or any other present methodology,
          as a valid or  accurate  means of valuing  stock  option  grants.  The
          calculation  was  based on the  following  assumptions:  (i) As of the
          grant date, Illinova's calculated Black-Scholes ratio was .2248. After
          discounting  for  risk  of  forfeiture  at 3  percent  per  year  over
          Illinova's three-year vesting schedule, the ratio is reduced to .2052;
          (ii) An annual dividend yield on Illinova Common Stock of 4.11%; (iii)
          A  risk-free  interest  rate  of  6.57%,  based  on  the  yield  of  a
          zero-coupon  government  bond  maturing at the end of the option term;
          and (iv) Stock volatility of 19.54%.
<TABLE>
<S>                                        <C>                                             <C>   

                                     Aggregated Option and Fiscal Year-End Option Value Table
                                           Number of Securities Underlying Unexercised     Value of Unexercised In-the-Money
                                                  Options at Fiscal Year-End                  Options at Fiscal Year-End
Name                                              Exercisable/Unexercisable                   Exercisable/Unexercisable
Larry D. Haab                                      56,900 shs./62,000 shs.                         $237,414/$57,400

Paul L. Lang                                       17,800 shs./19,500 shs.                          $75,148/$18,655

Larry F. Altenbaumer                               17,800 shs./20,500 shs.                          $75,148/$18,655

John G. Cook                                        9,900 shs./17,000 shs.                          $43,634/$14,130

David W. Butts                                      7,900 shs./17,500 shs.                          $37,384/$13,100
</TABLE>
<PAGE>

Pension Benefits
Illinois Power  maintains a Retirement  Income Plan for Salaried  Employees (the
"Retirement  Plan")  providing  pension  benefits  for  all  eligible  salaried
employees.  In addition to the Retirement Plan,  Illinois Power also maintains a
nonqualified  Supplemental  Retirement  Income Plan for Salaried  Employees (the
"Supplemental  Plan") that covers certain  officers  eligible to participate in
the  Retirement  Plan and provides for payments  from general  funds of Illinois
Power of any monthly  retirement  income not payable under the  Retirement  Plan
because of benefit limits imposed by law or because of certain  Retirement  Plan
rules  limiting the amount of credited  service  accrued by a  participant. 

     The  following  table  shows the  estimated  annual  pension  benefits on a
straight life annuity basis payable upon  retirement  based on specified  annual
average  earnings  and  years  of  credited  service  classifications,  assuming
continuation of the Retirement Plan and  Supplemental  Plan and employment until
age 65. This table does not show, but any actual pension benefit  payments would
be subject to, the Social Security offset. 

                                  Estimated Annual Benefits (rounded)
            Annual      15 Yrs.     20 Yrs.     25 Yrs.     30 Yrs.     35 Yrs.
            Average     Credited    Credited    Credited    Credited    Credited
            Earnings    Service     Service     Service     Service     Service
           $125,000     $37,500    $ 50,000     $62,500     $75,000     $87,500
            150,000      45,000      60,000      75,000      90,000     105,000
            175,000      52,500      70,000      87,500     105,000     122,500
            200,000      60,000      80,000     100,000     120,000     140,000
            250,000      75,000     100,000     125,000     150,000     175,000
            300,000      90,000     120,000     150,000     180,000     210,000
            350,000     105,000     140,000     175,000     210,000     245,000
            400,000     120,000     160,000     200,000     240,000     280,000
            450,000     135,000     180,000     225,000     270,000     315,000
            500,000     150,000     200,000     250,000     300,000     350,000
            550,000     165,000     220,000     275,000     330,000     385,000
            600,000     180,000     240,000     300,000     360,000     420,000
            650,000     195,000     260,000     325,000     390,000     455,000
            700,000     210,000     280,000     350,000     420,000     490,000
     The earnings used in determining pension benefits under the Retirement Plan
are the participants'  regular base  compensation,  as set forth under Salary in
the Summary Compensation Table.

     At December 31,  1997,  for  purposes of both the  Retirement  Plan and the
Supplemental Plan, Messrs. Haab, Lang, Altenbaumer, Cook and Butts had completed
32, 16, 25, 23 and 19 years of credited service, respectively.
<PAGE>

Employee Retention Agreements
Illinova  has  entered  into  Employee  Retention  Agreements  with  each of its
executive officers and with officers of its subsidiaries.  Under each agreement,
the officer  would be entitled to receive a lump sum cash  payment if his or her
employment were terminated by Illinova  without good cause or voluntarily by the
officer  for good  reason  within  two years  following  a change in  control of
Illinova  (as  defined  in the  Agreement)  or  terminated  prior to a change of
control  at the  request  of a  potential  acquirer.  The amount of the lump sum
payment would be equal to (1) 36 months' salary at the greater of the officer's
salary  rate in effect on the date the change in control  occurred or the salary
rate in effect on the date the officer's  employment  with Illinova  terminated;
plus (2) three times the latest  bonus  earned by the  officer  during the three
calendar years  preceding  termination of employment.  Under the agreement,  the
officer would continue, after any such termination of employment, to participate
in and receive  benefits under other benefit plans of Illinova  and/or  Illinois
Power.  Such coverage  would  continue for 36 months  following  termination  of
employment,  or, if earlier, until the officer reached age 65 or was employed by
another employer;  provided that, if the officer was 50 years of age or older at
the time of such  termination,  then coverage  under health,  life insurance and
similar  welfare plans would  continue until the officer became 55 years of age,
at which time he or she would be eligible to receive  the  benefits  extended to
the  employees  of Illinova  and its  subsidiaries  who elect early  retirement.

Compensation  and  Nominating  Committee  
Report  on  Officer  Compensation  
The seven-member Compensation and Nominating Committee of the Board of Directors
(the  "Committee") is composed  entirely of Outside  Directors.  The Committee's
role  includes an assessment of  Illinova's  and Illinois  Power's  Compensation
Strategy,  a  review  of  the  performance  of  the  elected  officers  and  the
establishment  of  specific  officer  salaries  subject to Board  approval.  The
Committee establishes  performance goals for the officers under the Compensation
Plan,  approves  payments made pursuant to the Compensation  Plan and recommends
grants  under  the  Long-Term  Incentive   Compensation  Plan  approved  by  the
shareholders in 1992. The Committee also reviews other forms of compensation and
benefits making  recommendations  to the Board on changes whenever  appropriate.
The  Committee  carries  out  these  responsibilities  with  assistance  from an
executive  compensation  consulting firm and with input from the Chief Executive
Officer and management as it deems appropriate.

Officer Compensation Philosophy
Illinova's  compensation philosophy reflects a commitment to compensate officers
competitively  with other  companies  while  rewarding  executives for achieving
levels of  operational  and  financial  excellence  consistent  with  continuous
improvement.  Illinova's  current  compensation  policy  is to  provide  a total
compensation  opportunity  targeted to the median of all utilities in the Edison
Electric  Institute (EEI) database.  All but one of the electric power companies
in the S&P Utilities  Index are also in the EEI  database.  The S&P index covers
the  industry  broadly  including  electric  and gas  utilities.  After  careful
consideration,  the  Committee  has decided to maintain a separate  compensation
peer group  limited to electric or  combination  electric and gas  companies for
reference purposes. While the philosophy described above was used by Illinova in
1997 as an indicator of future utility pay practices,  as the industry  migrates
toward deregulation and diversification, it is anticipated that the company will
broaden its competitive reference beyond the regulated utility industry in order
to compete sufficiently for talent in the deregulated environment of the future.
<PAGE>

     The  compensation  program for  officers  consists of base  salary,  annual
incentive and long-term  incentive  components.  The  combination of these three
elements  balances short- and long-term  business  performance  goals and aligns
officer   financial   rewards  with  those  of  Illinova's   shareholders.   The
compensation  program is  structured  so that,  depending  on the salary  level,
between 25 and 45 percent of an officer's total compensation  target is composed
of incentive compensation.

Base Salary Plan 
The Committee  determines  base salary ranges for  executive  officers  based on
competitive  pay  practices  of  similarly  sized  utilities.  Officer  salaries
correspond to approximately the median of the companies in the compensation peer
group.  Individual  increases  are  based  on  several  factors,  including  the
officer's  performance during the year, the relationship of the officer's salary
to the market  salary  level for the position and  competitive  industry  salary
increase practices.

Annual Incentive  Compensation  Plan 
Annual  incentive  awards are earned based on the achievement of specific annual
financial and  operational  goals by the Illinois Power officer group as a whole
and consideration of the officer's individual contribution. If payment is earned
under  this  Plan,  one-half  of the bonus is  payable  in cash  during the year
following the award year,  and one-half is credited to the  participants  in the
form of Common Stock units,  the number of which is  determined by dividing half
of the earned bonus amount by the closing  price of the Common Stock on the last
trading day of the award year.  The officer's  interest in the stock units vests
at the end of the three-year period, which begins the year after the award year.
The officer  receives this award in cash equal to (1) the closing stock price on
the first  trading day of the  distribution  year times the number of units held
plus (2)  dividend  equivalents  that would have been  received if the stock had
actually been issued.  Maximum awards under the plan may be up to 150 percent of
target; threshold awards are 50 percent of target.

     For Illinois Power officers,  1997 awards under the  Compensation  Plan are
based on  achievement in the  performance  areas:  earnings per share,  customer
satisfaction,  safety and employee  teamwork,  cost  management and  shareholder
value added. Up to 50 percent of the awarded amount is based on an assessment of
the individual officer's performance during the year.

     Awards shown under Bonus in the Summary  Compensation Table for performance
during 1997 were based on achievement of officers'  individual goals. There were
no payouts for the identified performance areas.
<PAGE>
    
Long-Term Incentive Compensation (LTIC) Plan
     Awards  under the LTIC plan are based on corporate  performance  as well as
individual  officers'  contributions  to  corporate  performance  subject to the
review of this Committee.  In 1997, it was determined that awards under the LTIC
plan be delivered in two components.  One-half of each officer's LTIC plan award
is  delivered in the form of stock  options  granted at fair market  value.  The
stock  options  granted to the  officers  for 1997  represent  an award based on
Illinova,  Illinois  Power,  and  individual  performance  as  evaluated  by the
Chairman and reviewed by the Committee. The other half of the LTIC plan award is
distributed to officers in cash based upon  Illinova's  Shareholder  Value-Added
(SVA) performance relative to a peer group of utility companies,  as measured in
overlapping  three-year periods. SVA measures Illinova's return on the Company's
weighted  average  cost of capital.  SVA  performance  at the median of the peer
group will  result in target  award  levels.  Performance  above the median will
result  in  payouts  greater  than  target to a  maximum  of two  times  target;
performance  significantly  below the median  results in no payouts.  Since 1996
represented the first year of the SVA plan's first three-year measurement cycle,
no awards are due to be paid out under the plan until 1999.

CEO  Compensation
     Larry Haab became Chairman,  President, and Chief Executive Officer ("CEO")
of Illinois Power on June 12, 1991, and Chairman,  President and Chief Executive
Officer  of  Illinova  in  December   1993.   Illinova  based  Mr.  Haab's  1997
compensation on the policies and plans described above.

     The  Committee  invokes  the  active  participation  of all  non-management
directors in reviewing Mr. Haab's  performance  before it makes  recommendations
regarding his  compensation.  The Committee is responsible for administering the
processes for completing this review.  The process starts early in the year when
the Board of Directors  works with Mr. Haab to establish his personal  goals and
short- and long-term  strategic  goals for Illinova and Illinois  Power.  At the
conclusion of the year, Mr. Haab reviews his performance with the non-management
directors.  The  Committee  oversees  this  review and  recommends  to the Board
appropriate  adjustments to compensation.  In setting the CEO's salary for 1997,
the Committee,  with the participation of all Outside Directors  determined that
Mr. Haab had provided very strong leadership in promoting electric  deregulation
in the State of Illinois. The continuing outage at the Clinton Power Station was
a major  setback.  Significant  progress was made in advancing  other  strategic
objectives of the Company.

     The 1997 Annual Incentive  Compensation  Plan award for the Chief Executive
Officer was calculated consistent with the determination of awards for all other
Illinois Power officers.  Under the terms of the plan, one-half of the award was
paid in cash and one-half  was  converted to 1,539 stock units which vest over a
three-year period as described above.

     The  20,000  option  shares  granted  to the CEO  reflect  the  Committee's
recognition  of this work in directing  Illinova and Illinois  Power towards its
long-term objectives.

Compensation and Nominating  Committee  
Ronald L.  Thompson,  Chairman 
J. Joe  Adorjan 
C. Steven McMillan  
Robert M. Powers  
Walter D. Scott 
Marilou von Ferstel  
John D. Zeglis
<PAGE>

Independent Auditors 
The Board of Directors of Illinois  Power has selected  Price  Waterhouse LLP as
independent  auditors  for the Company for 1998. A  representative  of that firm
will be present at the Annual  Meeting and  available to make a statement and to
respond to questions.

Other Matters  
Illinova's  1997 Summary  Annual Report to  Shareholders  was mailed to Illinois
Power's  shareholders  commencing on or about March 10, 1998. Copies of Illinois
Power's Annual Report on Form 10-K will be available to  shareholders  after its
filing with the Securities and Exchange  Commission on or before March 31, 1998.
Requests  should be  addressed  to  Investor  Relations,  G-21,  Illinois  Power
Company, 500 South 27th Street, Decatur, Illinois 62521-2200.

     Any proposal by a  shareholder  to be presented at the next Annual  Meeting
must be received at Illinois Power's  executive  offices not later than November
12, 1998.

Other Business  
Management does not know of any matter which will be presented for consideration
at the Annual  Meeting  other than the  matters  described  in the  accompanying
Notice of Annual Meeting.

By Order of the Board of Directors,

Leah Manning Stetzner,
Vice President, General Counsel and Corporate Secretary
Decatur, Illinois
March 10, 1998
<PAGE>

APPENDIX: 1997 ANNUAL REPORT TO SHAREHOLDERS

Table of Contents
Management's Discussion and Analysis             a-2
Responsibility for Information                   a-10
Report of Independent Accountants                a-10
Consolidated Statements of Income                a-11
Consolidated Balance Sheets                      a-12
Consolidated Statements of Cash Flows            a-13
Consolidated Statements of Retained Earnings     a-13
Notes to Consolidated Financial Statements       a-14
Selected Consolidated Financial Data             a-32
Selected Illinois Power Company Statistics       a-33

Abbreviations Used Throughout this Report
AFUDC          Allowance for Funds Used
               During Construction
Baldwin        Baldwin Power Station
Clinton        Clinton Power Station
DOE            Department of Energy
EITF           Emerging Issues Task Force of the
               Financial Accounting Standards Board
EMF            Electric and Magnetic Fields
EPS            Earnings Per Share
ESOP           Employees' Stock Ownership Plan
FAS            Statement of Financial
               Accounting Standards
FASB           Financial Accounting Standards Board
FERC           Federal Energy Regulatory Commission
Fuel Company   Illinois Power Fuel Company
HB 362         House Bill 362, An Act in Relation
               to the Competitive Provision of
               Utility Services
ICC            Illinois Commerce Commission
Illinova       Illinova Corporation
IP             Illinois Power Company             
IPFI           Illinois Power Financing I         
ISA            Integrated Safety Assessment       
kw             Kilowatt                           
kwh            Kilowatt-Hour                      
MGP            Manufactured-Gas Plant             
MIPS           Monthly Income Preferred Securities
MW             Megawatt                           
MWH            Megawatt-Hour                      
NOPR           Notice of Proposed Rulemaking      
NOx            Nitrogen Oxide                     
NRC            Nuclear Regulatory Commission      
PCA            Power Coordination Agreement       
PECO           PECO Energy Company                
S&P            Standard & Poor's                  
SO2            Sulfur Dioxide                     
Soyland        Soyland Power Cooperative, Inc.    
TOPrS          Trust Originated Preferred Securities
UFAC           Uniform Fuel Adjustment Clause     
UGAC           Uniform Gas Adjustment Clause      
U.S. EPA       United States Environmental        
               Protection Agency                  
Vermilion      Vermilion Power Station            
Wood River     Wood River Power Station           
<PAGE>
MANAGEMENT'S DISCUSSION AND ANALYSIS

In this report, we refer to the Consolidated Financial Statements, related Notes
to Consolidated  Financial Statements,  Selected Consolidated Financial Data and
Selected Statistics for information  concerning  consolidated financial position
and results of operations. This report contains estimates, projections and other
forward-looking statements that involve risks and uncertainties.  Actual results
or outcomes could differ  materially as a result of such  important  factors as:
the  outcome  of  state  and  federal  regulatory   proceedings   affecting  the
restructuring of the electric and gas utility  industries;  the impacts new laws
and regulations relating to restructuring, environmental, and other matters have
on IP; the effects of increased competition on the utility businesses;  risks of
owning and  operating  a nuclear  facility;  changes in prices and cost of fuel;
construction and operation  risks;  and increases in financing  costs.  Below is
discussion of the factors having  significant  impact on consolidated  financial
position and results of operations since January 1, 1995. 

     Illinois Power Company is a subsidiary of Illinova  Corporation,  a holding
company.  Illinova  Generating  Company,  Illinova  Energy  Partners,  Inc.  and
Illinova  Insurance  Company are wholly owned  subsidiaries  of Illinova.  IP is
engaged  in the  generation,  transmission,  distribution  and sale of  electric
energy and the distribution, transportation and sale of natural gas in the State
of Illinois.

Open Access and Wheeling 
On March 29, 1995,  the FERC issued a NOPR  initiating  the process of mandating
non-discriminatory  open access to public  utility  transmission  facilities  at
cost-based rates. Transmission of electricity for a reseller or redistributor of
energy is called  wholesale  wheeling.  Transmission  of electricity for end-use
customers is known as retail wheeling.

     On April 24, 1996,  FERC issued  Orders 888 and 889 which  established  the
Final Rule resulting  from the NOPR.  The Orders became  effective July 9, 1996.
The  Rule  requires  all  public  utilities  under  FERC  jurisdiction  that own
transmission  facilities to file  transmission  service tariffs that comply with
Pro Forma Tariffs attached to the Orders.  FERC also requires that all wholesale
sales  made by a  utility  provide  for  transmission  of the  power  under  the
prescribed terms and conditions. IP made a compliance filing as required on July
9, 1996, which has been accepted by FERC.

     Public  utilities  serving  customers at retail are not  required,  at this
time,  to abide by  FERC-mandated  terms and  conditions.  FERC does not require
public  utilities to give retail  customers access to alternate energy suppliers
or direct transmission service.

     The  move  to  open  access  transmission   service  likely  will  increase
competition in the wholesale  energy  market,  but this alone is not expected to
have a significant financial impact.

Competition  
On December 16, 1997,  Illinois  Governor  Edgar  signed  electric  deregulation
legislation.  HB 362 guarantees IP's residential customers a 15 percent decrease
in base electric  rates  beginning  August 1, 1998,  and an additional 5 percent
decrease  effective on May 1, 2002. The rate decreases are expected to result in
revenue  reductions  of  approximately  $40 million in 1998,  approximately  $80
million in each of the years 1999 through 2001 and approximately $100 million in
2002, based on current consumption. Customers with demand greater than 4 MW at a
single site will be free to choose their electric generation  suppliers ("direct
access") starting October 1999. Customers with at least 10 sites which aggregate
at least 9.5 MW in total demand also will have 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.

     Although the specified  residential rate reductions and the introduction of
direct access will lead to lower electric service  revenues,  HB 362 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,  adjusted to deduct: 1)
          delivery  charges  the  utility  will  continue  to  receive  from the
          customer,  and 2) the  market  value of the  freed-up  energy net of a
          mitigation factor,  which is a percentage  reduction of the transition
          charge amount.  The mitigation factor is designed to provide incentive
          for  management  to continue cost  reduction  efforts and generate new
          sources of revenue.

     2)   Utilities are provided the  opportunity  to lower their  financing and
          capital costs through the issuance of "securitized" bonds; 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.
<PAGE>

     The extent to which revenues are lowered 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.  The impact on net income
will  depend on,  among  other  things,  the amount of  revenues  earned and the
ongoing costs of doing business.

     In 1996, IP received approval from both the ICC and FERC to conduct an open
access  experiment  beginning  in 1996 and  ending on  December  31,  1999.  The
experiment  allows  certain  industrial  customers to purchase  electricity  and
related services from other sources.  Currently,  17 customers are participating
in the experiment.  Since  inception,  the experiment has cost IP  approximately
$11.2  million in lost revenue net of avoided  fuel cost and variable  operating
expenses.  This loss was  partially  offset by selling  the  surplus  energy and
capacity on the open market and by $2.7 million in transmission service charges.

Accounting Matters 
Prior  to  the  passage  of HB  362,  IP  prepared  its  consolidated  financial
statements in  accordance  with FAS 71,  "Accounting  for the Effects of Certain
Types of  Regulation."  Reporting  under FAS 71 allows  companies  whose service
obligations  and prices are regulated to maintain on their balance sheets assets
representing  costs they expect to recover from customers,  through inclusion of
such  costs in their  future  rates.  In July  1997,  the  EITF  concluded  that
application of FAS 71 accounting should be discontinued at the date of enactment
of  deregulation   legislation  for  business  segments  for  which  a  plan  of
deregulation has been  established.  The EITF further  concluded that regulatory
assets and  liabilities  that  originated  in the portion of the business  being
deregulated should be written off unless their recovery is specifically provided
for through future cash flows from the regulated portion of the business.

     Because HB 362 provides  for  market-based  pricing of electric  generation
services,  IP discontinued  application of FAS 71 for its generating segment. IP
evaluated its regulatory  assets and liabilities  associated with its generation
segment and  determined  that  recovery of these costs was not probable  through
rates charged to transmission and distribution customers,  the regulated portion
of the business.

     IP wrote  off  generation-related  regulatory  assets  and  liabilities  of
approximately  $195 million (net of income  taxes) in December  1997.  These net
assets  related to previously  incurred costs that were expected to be collected
through  future  revenues,  including  deferred  costs for Clinton,  unamortized
losses on reacquired debt, recoverable income taxes and other generation-related
regulatory  assets.  At December 31, 1997,  IP's net  investment  in  generation
facilities  was $3.5 billion and was  reflected in "Utility  Plant,  at Original
Cost" on IP's balance sheet.

     In addition,  IP evaluated  its  generation  segment plant  investments  to
determine if they had been impaired as defined in FAS 121,  "Accounting  for the
Impairment of Long-Lived  Assets and Long-Lived  Assets to Be Disposed Of." This
evaluation  determined  that future  revenues  were expected to be sufficient to
recover the costs of its generation  segment plant  investments and as a result,
no plant  write-downs were necessary.  However,  ultimate  recovery depends on a
number of factors and variables  including market conditions and IP's ability to
operate its generation assets efficiently.

     The  provisions  of HB 362 allow an  acceleration  in the rate at which any
utility-owned  assets are expensed without  regulatory  approval,  provided such
charges are consistent with generally accepted accounting principles. Under this
legislation,  up to an aggregate of $1.5 billion in  additional  expense for the
generation-related  assets  could be  accelerated  through  the year 2008.  This
reduction in the net book value of IP's  generation-related  assets  should help
position IP to operate  competitively  and  profitably in the changing  business
environment.  This accelerated charge would have a direct impact on earnings but
not on cash flows.

     The FASB  continues to review the  accounting  for  liabilities  related to
closure and removal of long-lived assets, including decommissioning. See "Note 3
- - Commitments and Contingencies" for a discussion of decommissioning.

     See "Note 1 - Summary of Significant  Accounting Policies" for a discussion
of other accounting issues.

Regulatory  Matters  
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  and again in June 1997,  the NRC named  Clinton  among  plants
having a trend of declining  performance.  In June 1997, IP committed to conduct
an ISA to thoroughly  assess Clinton's  performance.  The ISA was conducted by a
team of 30  individuals  with  extensive  nuclear  experience and no substantial
previous  involvement  at Clinton.  Their report  concluded  that the underlying
reasons for the  performance  problems at Clinton  were  ineffective  leadership
throughout the  organization in providing  standards of excellence,  complacency
throughout the organization,  barrier weaknesses and weaknesses in teamwork.  In
late October, a team commissioned by the NRC performed an evaluation to validate
the ISA results.  In December,  this team concluded that the findings of the ISA
accurately characterized Clinton's performance deficiencies and their causes.
<PAGE>

     On January 5, 1998,  IP and PECO  announced an  agreement  under which PECO
will provide  management  services  for Clinton.  Although a PECO team will help
manage the plant, IP will continue to maintain the operating license for Clinton
and retain  ultimate  oversight of the plant.  PECO employees will assume senior
positions  at  Clinton,  but the  plant  will  remain  primarily  staffed  by IP
employees.  IP made this  decision  based on a belief  that  bringing  in PECO's
experienced  management team would be the most efficient way to get Clinton back
on line and operating at a superior level as quickly as possible.

     On January 21,  1998,  the NRC placed  Clinton on its Watch List of nuclear
plants  that  require  additional  regulatory  oversight  because  of  declining
performance.  Twice a year the NRC  evaluates the  performance  of nuclear power
plants in the United  States  and  identifies  those  which  require  additional
regulatory  oversight.  Once  placed on the Watch List a plant must  demonstrate
consistent improved performance before it is removed from the list. The NRC will
monitor Clinton more closely than plants not on the Watch List. This may include
increased inspections, additional required documentation,  NRC-required approval
of processes and procedures, and higher-level NRC oversight.

     The NRC has advised IP that it must  submit a written  report to the NRC at
least two weeks  prior to  restarting  Clinton,  giving  the  agency  reasonable
assurance  that IP's actions to correct  recurring  weaknesses in the corrective
action program have been effective. After the report is submitted, the NRC staff
plans to meet with IP's management to discuss the plant's readiness for restart.

     In March  1997,  the NRC issued an order  approving  transfer  to IP of the
Clinton  operating  license related to Soyland's 13.2% ownership,  in connection
with the transfer  from  Soyland to IP of all of Soyland's  interest in Clinton.
Soyland's  title to the plant and directly  related  assets such as nuclear fuel
was  transferred  to IP in May 1997.  Soyland's  nuclear  decommissioning  trust
assets were  transferred to IP in May 1997,  consistent  with IP's assumption of
all  of   Soyland's   ownership   obligations   including   those   related   to
decommissioning.

     The FERC  approved an amended PCA between IP and Soyland in July 1997.  The
amended PCA  obligates  Soyland to purchase all of its capacity and energy needs
from IP for at  least  10  years.  The  amended  PCA  provides  that a  contract
cancellation  fee will be paid by  Soyland  to IP in the  event  that a  Soyland
Cooperative  member  terminates  its membership  from Soyland.  On May 31, 1997,
three distribution  cooperative  members terminated  membership by buying out of
their long-term wholesale power contracts with Soyland.  This action resulted in
Soyland  paying a fee of $20.8  million  to IP in June 1997 to  reduce  its base
capacity charges.  Fee proceeds of $2.9 million were used to offset the costs of
acquiring  Soyland's share of Clinton with the remaining $17.9 million  recorded
as interchange  revenue.  In December 1997, Soyland signed a letter of intent to
pay in advance the remainder of its base capacity charges in the PCA. The fee of
approximately $70 million will be deferred and recognized as interchange revenue
over the initial term of the PCA. The payment is contingent on Soyland obtaining
the necessary financing and regulatory approvals in 1998.

     In September 1997, the ICC approved a petition filed by IP which stipulates
customers will not be charged for certain additional costs of energy incurred as
a result of Clinton being out of service.  IP did not collect from its customers
$36.3 million for higher-cost replacement power in 1997. IP will forego recovery
of additional  fuel costs as the Clinton outage  continues into 1998.  Under the
petition,  fuel  costs  charged  to  customers  will be no higher  than  average
1995-1996  levels until  Clinton is back in service  operating at least at a 65%
capacity factor for two consecutive months.

     Under HB 362, IP may choose to eliminate application of the UFAC. IP's base
rates will still  include a component  for some level of recovery of fuel costs,
but IP  would  not be able to pass  through  to  customers  increased  costs  of
purchasing fuel,  emission  allowances,  or replacement power. On elimination of
the UFAC,  base rates will include a fixed  fuel-cost  factor  equivalent to the
average  1995 -  1996  fuel  cost  levels.  Future  recovery  of fuel  costs  is
uncertain,  as IP will  decrease base electric  rates to  residential  customers
beginning  in August 1998 and  certain  customers  will be free to choose  their
electric  generation  suppliers  beginning in October 1999.  The extent to which
fuel costs are recovered will depend on a number of factors including the future
market prices for wholesale and retail energy,  when Clinton returns to service,
and whether IP elects to eliminate the UFAC.

Year 2000
In November 1996, IP deployed a project team to coordinate  the  identification,
evaluation,  and  implementation of changes to computer systems and applications
necessary to achieve a year 2000 date  conversion with no effect on customers or
disruption  to business  operations.  

     These  actions are necessary to ensure that systems and  applications  will
recognize  and  process  coding  for the year 2000 and  beyond.  Major  areas of
potential  business impact have been identified and initial  conversion  efforts
are  underway.  IP also is  communicating  with third  parties with whom it does
business to ensure  continued  business  operations.  The cost of achieving year
2000 compliance is estimated to be at least $14 million through 1999.

     Contingency  plans for operating without year 2000 compliance have not been
developed.  Such  activity  will  depend  on  assessment  of  progress.  Project
completion is planned for the fourth quarter of 1999.
<PAGE>

Enhanced  Retirement 
In December  1994, IP announced  plans for  voluntary  enhanced  retirement  and
severance  programs.  During the fourth quarter of 1995, 727 employees  accepted
enhanced  retirement or severance  under these programs.  The combined  enhanced
retirement  and  severance  programs  generated  a pretax  charge of $38 million
against fourth quarter 1995 earnings.

Consolidated  Results  of  Operations
Overview 
Earnings  (loss)  applicable to common stock were $(65)  million for 1997,  $206
million  for 1996 and $156  million  for 1995.  The  decrease  in 1997  earnings
compared  to  1996  was due  primarily  to the  extraordinary  item  related  to
discontinued  application of FAS 71 for the generation segment, higher operation
and  maintenance  expenses due to Clinton,  higher power  purchased costs due to
Clinton  and Wood  River  outages  and an  increase  in  uncollectible  accounts
expense.  The  increase  in 1996 net income over 1995 was due  primarily  to the
one-time  charge in 1995 for the enhanced  retirement  and  severance  programs,
lower  operations  expense due to the  employment  decrease and lower  financing
costs.  The 1995 results  include  $(22.8)  million  net-of-tax for the enhanced
retirement  and severance  programs and $(3.5)  million for the carrying  amount
under consideration paid for preferred stock redeemed in December 1995.

     Regulators  historically  have determined IP's rates for electric  service,
the ICC at the  retail  level  and  the  FERC at the  wholesale  level.  The ICC
determines IP's rates for gas service. These rates have been designed to recover
the cost of service and allow  shareholders  the opportunity to earn a fair rate
of  return.   As  described  under   "Competition"   above,   Illinois  electric
deregulation  legislation  phases  in a  competitive  marketplace  for  electric
generation  while  maintaining   cost-based  regulation  for  electric  delivery
services  and gas service,  protecting  the  financial  integrity of the company
during the transition period.  Future electric and natural gas sales,  including
interchange  sales, will continue to be affected by an increasingly  competitive
marketplace,  changes  in the  regulatory  environment,  increased  transmission
access,   weather  conditions,   competing  fuel  sources,   interchange  market
conditions,  plant  availability,  fuel cost recoveries,  customer  conservation
efforts and the overall economy.

Electric Operations For the years 1995 through 1997, electric revenues including
interchange  increased  3.7% and the gross  electric  margin  decreased  6.4% as
follows:

(Millions of dollars)                        1997           1996           1995
Electric revenues                        $  1,244.4     $  1,202.9   $  1,252.6
Interchange revenues                          175.6          137.6        116.3
Fuel cost & power
  purchased                                  (450.3)        (313.3)      (333.4)
  Electric margin                        $    969.7     $  1,027.2   $  1,035.5

The components of annual changes in electric revenues were:

(Millions of dollars)                        1997            1996           1995
Price                                      $ (11.5)       $  (7.2)       $  13.3
Volume and other                               9.7            6.4           42.7
Fuel cost recoveries                          43.3          (48.9)          19.1
  Revenue increase
  (decrease)                               $  41.5        $ (49.7)       $  75.1

1997 Electric revenues excluding interchange sales increased 3.4%, primarily due
to an increase  in  revenues  under the UFAC and  increased  wheeling  revenues.
Interchange  revenues  increased 27.6% due to the receipt of an opt-out fee from
Soyland per the amended PCA and increased interchange activity.  Electric margin
decreased  primarily  due to  increased  power  purchased  costs as a result  of
outages at the nuclear and fossil facilities.

1996 Electric revenues excluding interchange sales decreased 4.0%, primarily due
to reduction in revenues  under the UFAC.  Volume changes by customer class were
insignificant,  as kwh sales to ultimate consumers (excluding  interchange sales
and wheeling) decreased .3%. Interchange revenues increased 18.3% as a result of
higher plant availability in the first half of the year.
<PAGE>

1995 The 6.4% increase in electric revenues was primarily due to a 1.9% increase
in kwh sales to ultimate consumers  (excluding  interchange sales and wheeling).
Volume  increases  resulted  from  higher  residential  sales  (4.8%) and higher
commercial  sales  (8.2%)  due  to  an  improving   economy  and  warmer  summer
temperatures  compared to 1994.  Industrial sales remained essentially unchanged
from 1994.  Interchange  revenues  increased  $6.3 million (5.8%) as a result of
increased sales opportunities.

     The cost of meeting IP's system  requirements  was  reflected in fuel costs
for  electric  plants and power  purchased.  Changes in these costs are detailed
below:

(Millions of dollars)                           1997         1996          1995
Fuel for electric plants
  Volume and other                          $   (37.7)    $   15.4     $    9.8
  Price                                          (8.5)       (12.0)       (35.5)
  Emission allowances                            12.3           .8         18.5
  Fuel cost recoveries                           18.2        (30.0)        14.5
                                                (15.7)       (25.8)         7.3
Power purchased                                 152.7          5.7          6.9
  Total increase (decrease)                 $   137.0     $  (20.1)    $   14.2
Weighted average system
  generating fuel cost
  ($/MWH)                                   $    12.06    $   11.01    $   11.41

     System  load  requirements,  generating  unit  availability,  fuel  prices,
purchased power prices, resale of energy to other utilities,  emission allowance
costs and fuel cost recovery through UFAC caused changes in these costs.

Changes in factors affecting the cost of fuel for electric generation are below:

                                          1997           1996          1995
Increase (decrease)
  in generation                          (25.4)%         5.4%           .7%
Generation mix
  Coal and other                          100%            78%           73%
  Nuclear                                   0%            22%           27%

1997 The cost of fuel decreased 6.3% and electric  generation  decreased  25.4%.
The decrease in fuel cost was primarily attributable to decreased generation and
a favorable  price variance.  These factors were partially  offset by effects of
the UFAC and increased  emission  allowance  costs.  Power  purchased  increased
$152.7  million  primarily  due to Clinton  and Wood River being out of service.

1996 The cost of fuel decreased 9.4% and electric generation increased 5.4%. The
decrease in fuel cost was primarily  attributable to the effects of the UFAC, as
well as a favorable  price variance.  These factors were partially  offset by an
increase  in fuel  cost  due to the  increase  in  generation.  Power  purchased
increased $5.7 million  primarily due to the extended Clinton outage.  Clinton's
equivalent  availability  and  generation  were  lower  than in 1995 due to that
outage. 

1995 The cost of fuel increased 2.8% and electric generation  increased .7%. The
increase in fuel cost was  attributable to the effects of the UFAC, the increase
in higher-cost fossil generation and the cost of emission allowances.  Clinton's
equivalent  availability  and generation  were lower in 1995 as compared to 1994
due to the  scheduled  refueling and  maintenance  outage.  Clinton  returned to
service April 29, 1995,  after  completing its fifth  refueling and  maintenance
outage, which began March 12, 1995. Power purchased increased $6.9 million.

Gas  Operations  For  the  years  1995  through  1997,  gas  revenues  including
transportation increased 29.9%, while the gross margin on gas revenues increased
9.3% as follows:

(Millions of dollars)                        1997            1996          1995
Gas revenues                               $  345.2      $  341.4      $  264.5
Gas cost                                     (207.7)       (202.6)       (138.8)
Transportation revenues                         8.7           6.8           8.0
  Gas margin                               $  146.2      $  145.6      $  133.7
(Millions of therms)
Therms sold                                   537           703           588
Therms transported                            309           251           273
  Total consumption                           846           954           861

Changes in the cost of gas purchased for resale were:

(Millions of dollars)                            1997         1996        1995
Gas purchased for resale
  Cost                                         $   8.0      $  49.0     $ (43.5)
  Volume                                         (30.0)         8.5        25.3
  Gas cost recoveries                             27.1          6.3       (15.4)
  Total increase (decrease)                    $   5.1      $  63.8     $ (33.6)
Average cost per therm
  delivered                                    $   .28      $  .267     $  .201
<PAGE>

     The 1997  increase  in gas costs was due to  slightly  higher  prices  from
suppliers  and  effects of the UGAC,  offset by a decrease  in volume.  The 1996
increase in gas costs was primarily due to higher prices from  suppliers and the
effects of the UGAC.  The 1995  decrease in the cost of gas purchased was due to
lower gas prices  caused by  unusually  warm  winter  weather  nationwide.  Also
contributing to the higher gas margins in 1995 was the 6.1% increase in gas base
rates approved by the ICC in April 1994.

Other  Expenses A  comparison  of  significant  increases  (decreases)  in other
operating  expenses,  maintenance and  depreciation  for the last three years is
presented in the following table:

(Millions of dollars)                        1997         1996          1995
Other operating expenses                   $  40.6      $ (9.8)      $   (.3)
Maintenance                                   12.0         (.3)         10.4
Depreciation and
  amortization                                 8.8         3.5           7.2

     The increase in operating  and  maintenance  expenses for 1997 is primarily
due to increased  company and contractor labor at the nuclear and fossil plants.
An increase in uncollectible  accounts expense and disposal of surplus inventory
also contributed to the increase.

     The decrease in operating expenses for 1996 is due primarily to the savings
from the enhanced  retirement  and severance  program,  partially  offset by the
costs of the extended  Clinton  outage and  increased  amortization  of MGP site
expenses.  The ICC  approved  tariff  riders in March 1996 that  resulted in the
current  recognition of MGP site remediation  costs in operating  expenses.  The
1996  increase  amounted to $5.5  million.  This increase is offset by increased
revenues collected under the riders.

     The  increase in  maintenance  expenses  for 1995 is  primarily  due to the
refueling and maintenance  outage at Clinton.  The increases in depreciation and
amortization  for each of the three years were due to increases in utility plant
balances.

Other  Income and  Deductions  - Net The 1997  decrease of $2.1 million in Other
Income and  Deductions,  Net is due primarily to 1996 accruals  recorded for the
planned  disposition  of  property.  The 1996  increase  was due  primarily to a
decrease  in the credit for  allocated  income  taxes.  The 1995 change in Other
Income and Deductions, Net was negligible.

Interest Charges Interest  charges,  including AFUDC,  decreased $2.8 million in
1997,  decreased  $15.5 million in 1996, and increased $3.6 million in 1995. The
1997  decrease is  primarily  due to the  continued  benefits of IP  refinancing
efforts  and  capitalization   reductions   partially  offset  by  increased  IP
short-term  borrowings  and  lower  AFUDC.  The 1996  decrease  was due to lower
short-term  interest  rates  and  the  impact  of  IP  refinancing  efforts  and
capitalization  reduction  during 1996.  The 1995  increase was due to increased
short-term borrowings at higher interest rates.

Inflation  Inflation,  as measured by the Consumer Price Index,  was 2.3%, 3.3%,
and 2.5% in 1997, 1996, and 1995,  respectively.  IP recovers  historical rather
than current plant costs in its regulated rates.

Liquidity and Capital Resources
Dividends 
On December 10, 1997,  IP declared the quarterly  common stock  dividend for the
first quarter of 1998.  On December 11, 1996, IP increased the quarterly  common
stock  dividend by 11% declaring the common stock dividend for the first quarter
of 1997. On December 13, 1995, IP increased the quarterly  common stock dividend
12%, declaring the common stock dividend for the first quarter of 1996.

Capital Resources and  Requirements 
IP needs cash for operating expenses,  interest and dividend payments,  debt and
certain  preferred stock  retirements and construction  programs.  To meet these
needs, IP has used internally generated funds and external financings, including
the  issuance of debt and  revolving  lines of credit.  The timing and amount of
external   financings   depend   primarily  on  economic  and  financial  market
conditions, cash needs and capitalization ratio objectives.
<PAGE>

     IP cash flows from  operations  during  1997  provided  sufficient  working
capital to meet ongoing operating  requirements,  to service existing common and
IP  preferred  stock  dividends  and debt  requirements  and to meet all of IP's
construction requirements.  Additionally, IP expects that future cash flows will
enable it to meet operating  requirements  and continue to service IP's existing
debt, preferred stock dividends,  IP's sinking fund requirements and all of IP's
anticipated construction  requirements.  Continued sufficiency of cash flows for
these  purposes  will  depend on a number of factors  and  variables,  including
market conditions, business expenses and the ability to compete.

     To a significant  degree,  the availability and cost of external  financing
depend on the  financial  health of the company  seeking  those funds.  Security
ratings are an indication of a company's  financial  position and may affect the
cost of securities,  as well as the  willingness of investors to invest in these
securities. The current ratings of IP's securities by three principal securities
rating agencies are as follows:

                                                Standard    Duff &
                                   Moody's      & Poor's    Phelps
First/New mortgage bonds            Baa1        BBB         BBB+
Preferred stock                     baa2        BBB-        BBB-
Commercial paper                    P-2         A-2         D-2

     Under current market conditions,  these ratings would afford IP the ability
to issue  additional  securities  through  external  financing.  IP has adequate
short-term and intermediate-term bank borrowing capacity.

     Based on its 1993  revised  standards  for review of utility  business  and
financial  risks,  S&P placed  IP,  along with  approximately  one-third  of the
industry,  in a "somewhat  below average"  category.  In April 1994, S&P lowered
IP's  mortgage  bond rating to BBB from BBB+.  In August  1995,  S&P revised its
ratings outlook from stable to positive.  In February 1996, Moody's also revised
its ratings outlook from stable to positive.

     Moody's  upgraded IP's  securities on July 1, 1996. The rating for mortgage
bonds was raised from Baa2 to Baa1, while preferred stock ratings went from baa3
to baa2.  Duff & Phelps has  indicated  that it expects  IP's  ratings to remain
stable,  reflecting a modestly strengthening  financial profile characterized by
good cash flow and an average business risk profile.

     For the years 1997, 1996 and 1995,  changes in long-term debt and preferred
stock, including normal maturities and elective redemptions, were as follows:

(Millions of dollars)                        1997           1996            1995
Long-term debt                              $ (11)         $(154)         $  (5)
Preferred stock                               (39)            71           (135)
  Total decrease                            $ (50)         $ (83)         $(140)

     The  amounts  shown in the  preceding  table  for debt  retirements  do not
include all mortgage  sinking  fund  requirements.  IP  generally  has met these
requirements  by  pledging  property  additions  as  permitted  under  IP's 1943
Mortgage  and  Deed  of  Trust  and  the  1992  New  Mortgage.   For  additional
information, see "Note 8 - Long-Term Debt" an d "Note 9 - Preferred Stock."

     During 1997, IP redeemed  $34.9 million (all of the  remaining)  Adjustable
Rate Series A serial  preferred  stock. IP also redeemed $4.2 million of various
issues of serial  preferred  stock.  In addition,  $10.5 million of  medium-term
notes  matured  and were  retired.  During  the year IP issued  $150  million of
Adjustable Rate Pollution Control Revenue Bonds, due April 1, 2032. The proceeds
were used on June 2,  1997,  to retire  $150  million  of IP's 7 5/8%  Pollution
Control First Mortgage Bonds due 2016.

     During 1996, IP redeemed  $2.2 million of  Adjustable  Rate Series A serial
preferred stock,  $20.5 million (all of the remaining)  Adjustable Rate Series B
serial preferred stock and $6.7 million of 7.75% serial preferred stock.  During
the year, IP also retired $62.9 million of 8.75% First  Mortgage Bonds due 2021,
$6  million  of 8% New  Mortgage  Bonds  due  2023 and $23  million  of 7.5% New
Mortgage  Bonds due 2025.  The $40 million of 5.85% First Mortgage Bonds matured
and were retired.  In addition,  $21.5 million of medium-term  notes matured and
were retired.

     In February 1995, IP redeemed $12 million of 8.00%  mandatorily  redeemable
serial  preferred  stock.  In May 1995, IP redeemed the remaining $24 million of
8.00% mandatorily  redeemable serial preferred stock. In March 1995, IP redeemed
$.2  million of 7.56%  serial  preferred  stock and $3  million of 8.24%  serial
preferred  stock. In August 1995, IP redeemed $5 million of 8.75% First Mortgage
Bonds.  In December  1995, IP redeemed  $34.7 million of 8.00% serial  preferred
stock,  $33.6 million of 7.56% serial  preferred  stock and $27 million of 8.24%
serial preferred stock.
<PAGE>

     IPFI is a  statutory  business  trust in which IP serves as  sponsor.  IPFI
issued $100 million of TOPrS at 8% (4.8%  after-tax  rate) in January 1996.  The
TOPrS were issued by IPFI,  which invested the proceeds in an equivalent  amount
of IP subordinated debentures due in 2045. The proceeds were used by IP to repay
short-term indebtedness on varying dates on or before March 1, 1996. IP incurred
the indebtedness in December 1995 to redeem $95.3 million  (principal  value) of
higher-cost outstanding preferred stock of IP.

     In 1992,  IP  executed a general  obligation  mortgage  (New  Mortgage)  to
replace, over time, IP's 1943 Mortgage and Deed of Trust (First Mortgage).  Both
mortgages  are  secured  by liens on  substantially  all of IP's  properties.  A
corresponding  issue of First Mortgage bonds, under the First Mortgage,  secures
any  bonds  issued  under  the New  Mortgage.  In  October  1997,  at a  special
bondholders  meeting,  the 1943  First  Mortgage  was  amended  to be  generally
consistent  with the New Mortgage.  The New Mortgage  provides IP with increased
financial flexibility.

     At December 31, 1997, based on the most restrictive earnings test contained
in the New Mortgage, IP could issue approximately $800 million of additional New
Mortgage bonds for other than refunding purposes. Also at December 31, 1997, the
unused portion of IP total bank lines of credit was $354 million.  The amount of
available IP unsecured  borrowing  capacity totaled $168 million at December 31,
1997.

     On February  12, 1997,  the IP Board of Directors  approved a change to the
Articles of  Incorporation  to remove the  limitation on the amount of unsecured
debt  that  IP  can  issue.  The  change  will  be  voted  on by  the  preferred
stockholders at a special meeting planned to be held in 1998.

     Under HB 362, IP may issue transitional  funding  instruments for up to 25%
of its  December  31, 1996,  capitalization  on or after  August 1, 1998.  IP is
continuing to review its refinancing plans but could issue up to $864 million of
transitional  funding  instruments  on or  after  August  1,  1998,  under  this
provision.  In addition,  IP would be eligible to issue up to an additional $864
million of  transition  funding  instruments  on or after August 1, 1999. Of the
proceeds from the issuance of transitional funding instruments, 80% or more must
be used to retire and  repurchase  IP debt and  equity  while 20% or less can be
used to fund certain other transition costs.

     Construction   expenditures   for  the  years   1995   through   1997  were
approximately  $620.5  million,  including  $17.5 million of AFUDC. IP estimates
that it will spend  approximately $225 million for construction  expenditures in
1998.  IP  construction  expenditures  for the period  1998-2002 are expected to
total  about $1 billion.  Additional  expenditures  may be required  during this
period  to  accommodate  transitional  expenditures  related  to  a  competitive
environment, environmental compliance costs and system upgrades, which cannot be
determined at this time.

     IP's capital  expenditures  for the years 1998 through 2002, in addition to
its construction expenditures,  are expected to include $129 million for nuclear
fuel and $291 million for mandatory debt retirement.

     See "Note 3 - Commitments and  Contingencies"  for additional  information.
Internal cash generation will meet  substantially  all  construction and capital
requirements.

Environmental  Matters  
See "Note 3 - Commitments and  Contingencies"  for a discussion of environmental
matters that impact or could potentially impact IP.

Tax Matters 
See "Note 6 - Income  Taxes"  for a discussion  of effective tax rates and other
tax issues.
<PAGE>

Illinois Power Company 
RESPONSIBILITY FOR INFORMATION 

The consolidated  financial statements and all information in this annual report
are the responsibility of management. The consolidated financial statements have
been prepared in conformity with generally  accepted  accounting  principles and
include  amounts that are based on  management's  best  estimates and judgments.
Management  also  prepared  the other  information  in the annual  report and is
responsible for its accuracy and  consistency  with the  consolidated  financial
statements. In the opinion of management,  the consolidated financial statements
fairly reflect Illinois Power's  financial  position,  results of operations and
cash flows.

Illinois  Power believes that its  accounting  and internal  accounting  control
systems are maintained so that these systems provide  reasonable  assurance that
assets are  safeguarded  against loss from  unauthorized  use or disposition and
that the financial records are reliable for preparing the consolidated financial
statements.  The consolidated financial statements have been audited by Illinois
Power's  independent  accountants,  Price  Waterhouse  LLP, in  accordance  with
generally accepted auditing standards.  Such standards include the evaluation of
internal  accounting  controls to establish a basis for  developing the scope of
the examination of the consolidated financial statements. In addition to the use
of independent  accountants,  Illinois Power  maintains a professional  staff of
internal  auditors who conduct  financial,  procedural  and special  audits.  To
assure their  independence,  both Price Waterhouse LLP and the internal auditors
have direct access to the Audit Committee of the Board of Directors.

The Audit Committee is composed of members of the Board of Directors who are not
active or retired  employees of Illinois  Power.  The Audit Committee meets with
Price Waterhouse LLP and the internal auditors and makes  recommendations to the
Board of Directors concerning the appointment of the independent accountants and
services to be performed.  Additionally,  the Audit  Committee  meets with Price
Waterhouse  LLP to discuss the results of their annual audit,  Illinois  Power's
internal  accounting  controls  and  financial  reporting  matters.   The  Audit
Committee  meets with the internal  auditors to assess the  internal  audit work
performed, including tests of internal accounting controls.

Larry D.  Haab  Chairman,  President  
and Chief Executive Officer 



Larry F. Altenbaumer 
Senior Vice President 
and Chief Financial Officer  

Illinois  Power  Company  
REPORT OF INDEPENDENT ACCOUNTANTS
PRICE WATERHOUSE  LLP 
To the Board of Directors  and  Shareholders  of Illinois  Power Company 

In our opinion, the consolidated  financial statements of Illinois Power Company
and its subsidiaries appearing on pages a-11 through a-31 of this report present
fairly,  in all material  respects,  the  financial  position of Illinois  Power
Company and its  subsidiaries  at December 31, 1997 and 1996, and the results of
their  operations and their cash flows for each of the three years in the period
ended  December 31, 1997,  in  conformity  with  generally  accepted  accounting
principles.  These  financial  statements  are the  responsibility  of  Illinois
Power's  management;  our  responsibility  is to  express  an  opinion  on these
financial  statements  based on our  audits.  We  conducted  our audits of these
statements  in accordance  with  generally  accepted  auditing  standards  which
require that we plan and perform the audit to obtain reasonable  assurance about
whether the financial  statements  are free of material  misstatement.  An audit
includes  examining,  on a test  basis,  evidence  supporting  the  amounts  and
disclosures in the financial  statements,  assessing the  accounting  principles
used and  significant  estimates made by management,  and evaluating the overall
financial  statement  presentation.   We  believe  that  our  audits  provide  a
reasonable basis for the opinion expressed above.

As discussed in Note 1 to the consolidated financial statements,  Illinois Power
discontinued  applying the  provisions  of  Statement  of  Financial  Accounting
Standards No. 71,  "Accounting for the Effects of Certain Types of Regulations,"
for its generation segment of the business in December 1997.

Price Waterhouse LLP 
St. Louis, Missouri 
February 12, 1998 

<PAGE>

Illinois Power Company 
CONSOLIDATED STATEMENTS OF INCOME


<TABLE>
<S>                                                                                       <C>        <C>         <C>    
                                                                                                       (Millions of dollars)
For the Years Ended December 31,                                                             1997        1996        1995
Operating Revenues
Electric                                                                                 $  1,244.4  $  1,202.9  $  1,252.6
Electric interchange                                                                          175.6       137.6       116.3
Gas                                                                                           353.9       348.2       272.5
  Total                                                                                     1,773.9     1,688.7     1,641.4
Operating Expenses and Taxes
Fuel for electric plants                                                                      232.4       248.1       273.9
Power purchased                                                                               217.9        65.2        59.5
Gas purchased for resale                                                                      207.7       202.6       138.8
Other operating expenses                                                                      290.5       249.9       259.7
Maintenance                                                                                   111.7        99.7       100.0
Enhanced retirement and severance                                                               -           -          37.8
Depreciation and amortization                                                                 198.8       190.0       186.5
General taxes                                                                                 133.8       131.3       135.0
Income taxes                                                                                  102.4       140.5       125.8
  Total                                                                                     1,495.2     1,327.3     1,317.0
Operating income                                                                              278.7       361.4       324.4
Other Income and Deductions, Net                                                               (4.2)       (6.3)         .3
Income before interest charges                                                                274.5       355.1       324.7
Interest Charges
Interest expense                                                                              128.7       133.0       148.0
Allowance for borrowed funds used during construction                                          (5.0)       (6.5)       (6.0)
  Total                                                                                       123.7       126.5       142.0
Net income before extraordinary item                                                          150.8       228.6       182.7
Extraordinary item net of income tax benefit of $118.0 million (Note 1)                      (195.0)        -           -
Net income (loss)                                                                             (44.2)      228.6       182.7
Less - Preferred dividend requirements                                                         21.5        22.3        23.7
Plus - Carrying amount over (under) consideration paid for redeemed preferred stock              .2         (.7)       (3.5)
Net income (loss) applicable to common stock                                             $    (65.5) $    205.6  $    155.5
</TABLE>

See notes to  consolidated  financial  statements  which are an integral part of
these statements.

<PAGE>

Illinois Power company
CONSOLIDATED BALANCE SHEETS
<TABLE>
                                                                                                            (Millions of dollars)
December 31,                                                                                                    1997       1996
Assets
Utility Plant, at original cost
<S>                                                                                                         <C>        <C>  
Electric (includes construction work in progress of $214.3 million and $212.5 million, respectively)        $  6,690.4 $  6,335.4
Gas (includes construction work in progress of $10.7 million and $21.2 million, respectively)                    663.0      646.1
                                                                                                               7,353.4    6,981.5
Less - accumulated depreciation                                                                                2,808.1    2,419.7
                                                                                                               4,545.3    4,561.8
Nuclear fuel in process                                                                                            6.3        5.3
Nuclear fuel under capital lease                                                                                 126.7       96.4
                                                                                                               4,678.3    4,663.5
Investments and Other Assets                                                                                       5.9       14.5
Current Assets
Cash and cash equivalents                                                                                         17.8       12.5
Accounts receivable (less allowance for doubtful accounts of $5.5 million and $3.0 million, respectively)
  Service                                                                                                        115.6      138.8
  Other                                                                                                           16.6       51.1
Accrued unbilled revenue                                                                                          86.3      106.0
Materials and supplies, at average cost
  Fossil fuel                                                                                                     12.6        7.9
  Gas in underground storage                                                                                      29.3       27.2
  Operating materials                                                                                             75.4       77.1
Prepayments and other                                                                                             61.2       23.7
                                                                                                                 414.8      444.3
Deferred Charges
Deferred Clinton costs                                                                                             -        103.9
Recoverable income taxes                                                                                           -        101.3
Other                                                                                                            192.5      241.0
                                                                                                                 192.5      446.2
                                                                                                            $  5,291.5 $  5,568.5
Capital and Liabilities
Capitalization
Common stock - No par value, 100,000,000 shares authorized; 75,643,937 shares issued, stated at             $  1,424.6 $  1,424.6
Retained earnings                                                                                                 89.5      245.9
Less - Capital stock expense                                                                                       7.3        8.2
Less - 9,428,645 and 3,410,897 shares of common stock in treasury, respectively, at cost                         207.7       86.2
  Total common stock equity                                                                                    1,299.1    1,576.1
Preferred stock                                                                                                   57.1       96.2
Mandatorily redeemable preferred stock                                                                           197.0      197.0
Long-term debt                                                                                                 1,617.5    1,636.4
  Total capitalization                                                                                         3,170.7    3,505.7
Current Liabilities
Accounts payable                                                                                                 102.7      149.7
Notes payable                                                                                                    376.8      310.0
Long-term debt and lease obligations maturing within one year                                                     87.5       47.7
Dividends declared                                                                                                22.9       24.7
Taxes accrued                                                                                                     27.5       46.0
Interest accrued                                                                                                  33.0       34.3
Other                                                                                                             78.7       43.1
                                                                                                                 729.1      655.5
Deferred Credits
Accumulated deferred income taxes                                                                                980.6    1,048.0
Accumulated deferred investment tax credits                                                                      208.3      215.5
Other                                                                                                            202.8      143.8
                                                                                                               1,391.7    1,407.3
                                                                                                            $  5,291.5 $  5,568.5
</TABLE>


(Commitments and Contingencies Note 3)
See notes to  consolidated  financial  statements  which are an integral part of
these statements.


<PAGE>

Illinois Power company
CONSOLIDATED STATEMENTS OF CASH FLOWS
<TABLE>
<S>                                                                                                 <C>       <C>       <C>   
                                                                                                             (Millions of dollars)
For the Years Ended December 31,                                                                       1997      1996      1995
Cash Flows from Operating Activities
Net income (loss)                                                                                   $  (44.2) $  228.6  $  182.7
Items not requiring (providing) cash -                                                                 202.1     195.3     190.0
  Depreciation and amortization                                                                         (5.0)     (6.5)     (6.0)
  Allowance for funds used during construction                                                          29.4      64.2      42.0 
  Deferred income taxes                                                                                  -         -        37.8 
  Enhanced retirement and severance                                                                    195.0       -         -   
  Extraordinary item                                                                                                             
Changes in assets and liabilities -                                                                     57.7     (35.2)     38.7 
  Accounts and notes receivable                                                                         19.7     (16.9)    (10.2)
  Accrued unbilled revenue                                                                              (5.1)     (1.2)     22.8 
  Materials and supplies                                                                               (31.2)     29.8     (14.0)
  Accounts payable                                                                                        .3     (14.8)    (10.1)
  Interest accrued and other, net                                                                      418.7     443.3     473.7 
Net cash provided by operating activities                                                                                        
Cash Flows from Investing Activities                                                                  (223.9)   (187.3)   (209.3)
Construction expenditures                                                                               5.0       6.5       6.0 
Allowance for funds used during construction                                                            27.8       5.0      (7.5)
Other investing activities                                                                            (191.1)   (175.8)   (210.8)
Net cash used in investing activities                                                                                           
Cash Flows from Financing Activities                                                                 (114.6)   (107.9)   (100.5)
Dividends on common stock and preferred stock                                                        (121.5)    (18.9)    (67.3)
Repurchase of common stock                                                                                                      
Redemptions -                                                                                        (164.1)   (355.8)   (213.6)
  Short-term debt                                                                                    (160.8)   (153.7)     (5.2)
  Long-term debt                                                                                      (39.0)    (29.5)   (134.5)
  Preferred stock                                                                                                                
Issuances -                                                                                            231.0     306.2     209.5 
  Short-term debt                                                                                      150.0       -         -   
  Long-term debt                                                                                         -       100.0       -   
  Preferred stock                                                                                       (3.3)       .3       5.1 
Other financing activities                                                                            (222.3)   (259.3)   (306.5)
Net cash used in financing activities                                                                    5.3       8.2     (43.6)
Net change in cash and cash equivalents                                                                 12.5       4.3      47.9 
Cash and cash equivalents at beginning of year                                                       $  17.8  $   12.5  $    4.3 
Cash and cash equivalents at end of year                                                            
</TABLE>


Illinois Power company
CONSOLIDATED STATEMENTS OF RETAINED EARNINGS
<TABLE>
<S>                                                                              <C>      <C>       <C>  
                                                                                         (Millions of dollars)
For the Years Ended December 31,                                                   1997      1996        1995
Balance at beginning of year                                                     $  245.9  $  129.6  $   51.1
Net income (loss) before dividends and carrying amount adjustment                   (44.2)    228.6     182.7
                                                                                    201.7     358.2     233.8
Less -
  Dividends -
  Preferred stock                                                                    21.7      22.6      23.6
  Common stock                                                                       90.7      86.6      77.1
  Investment transfer to Illinova                                                     -         2.4       -
Plus -
  Carrying amount over (under) consideration paid for redeemed preferred stock         .2       (.7)     (3.5)
                                                                                   (112.2)   (112.3)   (104.2)
Balance at end of year                                                           $   89.5  $  245.9  $  129.6
</TABLE>

See notes to  consolidated  financial  statements  which are an integral part of
these statements.


<PAGE>


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1 - Summary of Significant Accounting Policies
Principles of Consolidation  IP is a subsidiary of Illinova,  a holding company.
IP is engaged in the generation, transmission, distribution and sale of electric
energy and the distribution, transportation and sale of natural gas in the state
of Illinois. The consolidated financial statements include the accounts of IP, a
combination electric and gas utility, Illinois Power Capital, L.P. and IPFI. See
"Note  9  - Preferred  Stock"  for  additional  information.   

     All significant intercompany balances and transactions have been eliminated
from the consolidated financial statements.  Preparation of financial statements
in conformity with generally accepted accounting  principles requires the use of
management's estimates. Actual results could differ from those estimates.

Regulation  IP is subject to  regulation  by the ICC and the FERC.  Prior to the
passage  of HB  362,  IP  prepared  its  consolidated  financial  statements  in
accordance  with  FAS 71,  "Accounting  for the  Effects  of  Certain  Types  of
Regulation."  Reporting under FAS 71 allows companies whose service  obligations
and prices are  regulated  to  maintain on their  balance  sheets  assets  which
represent costs they expect to recover from customers  through inclusion of such
costs in their future rates.  In July 1997, the EITF concluded that  application
of FAS 71  accounting  should  be  discontinued  at the  date  of  enactment  of
deregulation  legislation for business segments for which a plan of deregulation
has been  established.  The EITF further  concluded that  regulatory  assets and
liabilities  that  originated in the portion of the business  being  deregulated
should be written off unless their recovery is specifically provided for through
future cash flows from the  regulated  portion of the  business.  

     Because HB 362 provides  for  market-based  pricing of electric  generation
services,  IP discontinued  application of FAS 71 for its generating  segment in
December 1997 when HB 362 was signed by Illinois  Governor  Edgar.  IP evaluated
its regulatory assets and liabilities associated with its generation segment and
determined  that recovery of these costs was not probable  through rates charged
to  transmission  and  distribution  customers,  the  regulated  portion  of its
business.  Therefore,  IP wrote off  generation-related  regulatory  assets  and
liabilities  of  approximately  $195 million  (net of income  taxes) in December
1997.  These net  assets  related  to  previously  incurred  costs that had been
expected to be collected  through future  revenues,  including  deferred Clinton
post  construction  costs,  unamortized  losses on reacquired debt,  recoverable
income taxes and other  generation-related  regulatory  assets.  At December 31,
1997,  IP's net  investment  in generation  facilities  was $3.5 billion and was
included in "Utility  Plant,  at Original  Cost"  on IP's  Consolidated  Balance
Sheets.

IP's principal accounting policies are:

Regulatory  Assets  Regulatory  assets represent  probable future revenues to IP
associated  with certain costs that are expected to be recovered  from customers
through the ratemaking process. Significant regulatory assets are as follows:

(Millions of dollars)                          1997            1996
Deferred Clinton
  post-construction costs                   $    -           $ 103.9
Recoverable income taxes                    $    -           $ 101.3
Unamortized losses on reacquired debt       $  32.3          $  87.7
Manufactured-gas plant site cleanup costs   $  64.8          $  69.1
DOE decontamination and
  decommissioning fees                      $   6.3          $   5.4

Utility  Plant The cost of  additions  to  utility  plant and  replacements  for
retired property units is capitalized.  Cost includes labor,  materials,  and an
allocation of general and  administrative  costs, plus AFUDC as described below.
Maintenance and repairs,  including replacement of minor items of property,  are
charged to maintenance expense as incurred.  When depreciable property units are
retired,  the original cost and  dismantling  charges,  less salvage value,  are
charged  to   accumulated   depreciation.   

<PAGE>

Allowance for Funds Used During Construction The FERC Uniform System of Accounts
defines AFUDC as the net costs for the period of  construction of borrowed funds
used for  construction  purposes  and a  reasonable  rate on other funds when so
used.  AFUDC is capitalized as a component of  construction  work in progress by
those business  segments  applying the  provisions of FAS 71. In 1997,  1996 and
1995,  the pre-tax rate used for all  construction  projects was 5.6%,  5.8% and
6.5%, respectively.  Although cash is not currently realized from the allowance,
it is realized under the ratemaking process over the service life of the related
property through increased revenues resulting from a higher rate base and higher
depreciation expense.  Non-regulated business segments capitalize interest under
the guidelines in FAS 34, "Capitalization of Interest Cost."

Depreciation  For  financial  statement  purposes,  IP  depreciates  the various
classes of depreciable  property over their  estimated  useful lives by applying
composite rates on a straight-line basis. In 1997, 1996 and 1995, provisions for
depreciation were 2.8%, 2.8% and 2.8%, respectively,  of the average depreciable
cost for Clinton.  Provisions for depreciation for all other electric plant were
2.8%,  2.6% and  2.6% in  1997,  1996 and  1995,  respectively.  Provisions  for
depreciation  of gas utility plant,  as a percentage of the average  depreciable
cost,  were  3.3%,  3.9%  and  3.9%  in  1997,  1996  and  1995,   respectively.

Amortization  of Nuclear Fuel IP leases nuclear fuel from the Fuel Company under
a capital  lease.  Amortization  of nuclear fuel  (including  related  financing
costs) is determined on a unit of production  basis.  A provision for spent fuel
disposal costs is charged to fuel expense based on kwh generated.  See "Note 3 -
Commitments and  Contingencies"  for discussion of  decommissioning  and nuclear
fuel disposal costs. 

Unamortized  Debt Discount,  Premium and Expense  Discount,  premium and expense
associated  with  long-term  debt are  amortized  over the lives of the  related
issues.  Costs  related  to  refunded  debt  for  business  segments  under  the
provisions of FAS 71 are amortized over the lives of the related new debt issues
or the remaining life of the old debt if no new debt is issued. Costs related to
refunded debt for the generating segment are expensed when incurred.

Revenue and Energy Cost IP records  revenue for  services  provided  but not yet
billed to more closely match revenues with expenses. Unbilled revenues represent
the estimated  amount  customers  will be billed for service  delivered from the
time  meters  were  last  read to the end of the  accounting  period.  Operating
revenues  include related taxes that have been billed to customers in the amount
of $71 million in 1997,  $68 million in 1996 and $66 million in 1995.  The costs
of fuel for the generation of electricity, purchased power and gas purchased for
resale are recovered from customers  pursuant to the electric fuel and purchased
gas  adjustment  clauses.  Accordingly,  allowable  energy  costs that are to be
passed on to customers  in a  subsequent  accounting  period are  deferred.  The
recovery of costs deferred under these clauses is subject to review and approval
by the ICC. In September  1997, IP filed a petition with the ICC that stipulated
customers will not be charged for certain additional costs of energy incurred as
a result of  Clinton  being out of  service.  During  1997,  as a result of this
stipulation, IP did not collect $36.3 million of fuel costs. IP will also forego
recovery  of  additional  fuel  costs in 1998 for the  duration  of the  Clinton
outage.  Under the petition,  fuel costs charged to customers  will be no higher
than  average  1995-1996  levels until  Clinton is back in service  operating at
least at a 65% capacity factor for two consecutive months.

Income Taxes  Deferred  income taxes result from temporary  differences  between
book income and taxable  income,  and the tax bases of assets and liabilities on
the balance  sheet.  The temporary  differences  relate  principally to plant in
service and  depreciation. 

     Investment  tax  credits  used to reduce  federal  income  taxes  have been
deferred and are being amortized to income over the service life of the property
that gave rise to the credits.

     IP is included in Illinova's consolidated federal income tax return. Income
taxes  are  allocated  to the  individual  companies  based on their  respective
taxable income or loss. See "Note 6 - Income Taxes" for additional discussion.

<PAGE>

Preferred Dividend Requirements Preferred dividend requirements reflected in the
Consolidated Statements of Income are recorded on the accrual basis.

Consolidated  Statements of Cash Flows Cash and cash equivalents include cash on
hand and  temporary  investments  purchased  with an initial  maturity  of three
months or less.  Capital lease obligations not affecting cash flows increased by
$30  million,   $31  million  and  $19  million  during  1997,  1996  and  1995,
respectively. Income taxes and interest paid are as follows:

                                                 Years ended December 31,
(Millions of dollars)                1997          1996             1995
Income taxes                       $   94.3      $   65.9         $   65.7
Interest                           $  140.0      $  147.4         $  152.4

Interest  Rate Cap  Generally,  premiums  paid for  purchased  interest rate cap
agreements are being  amortized to interest  expense over the terms of the caps.
Unamortized premiums are included in Current Assets, "Prepayments and other," in
the Consolidated Balance Sheets. Amounts to be received under the cap agreements
are accrued and recognized as a reduction in interest expense. 

Transactions  with Illinova In addition to transfers of capital reflected in the
Consolidated  Statements of Retained  Earnings,  IP provided  approximately $122
million,  $81 million and $34 million in funds to Illinova  for  operations  and
investments  during  1997,  1996 and 1995,  respectively.  Illinova is paying IP
interest on these funds at a rate equal to that which  Illinova  would have paid
had it used a currently outstanding line of credit. In addition, Illinova and IP
have  recorded  an  intercompany  payable  and  receivable,   respectively,  for
approximately  $10.2 million,  $14.3 million and $18.4 million in 1997, 1996 and
1995,  respectively,  in order to recognize the effect on the  Employees'  Stock
Ownership  Plan of the  conversion  of IP common stock to Illinova  common stock
concurrent with the formation of Illinova.  This was a noncash transaction.  See
"Note 10 - Common Stock and Retained Earnings" for additional information.

New  Pronouncements  The FASB issued FAS 128,  "Earnings Per Share"  in February
1997, effective for financial statements issued after December 15, 1997. FAS 128
establishes  standards  for  computing  and  presenting  EPS  and  replaces  the
presentation  of primary EPS and fully diluted EPS with a presentation  of basic
EPS and diluted EPS, respectively.  No new requirements are imposed on IP by FAS
128.

     The  FASB  issued  FAS  129,   "Disclosure  of  Information  about  Capital
Structure"  in February  1997,  effective for financial  statements  for periods
ending after  December 15, 1997.  FAS 129  establishes  standards for disclosing
information  about an  entity's  capital  structure  and  contains  no change in
disclosure  requirements  for  entities  that  were  previously  subject  to the
requirements  of Accounting  Principles  Board Opinions 10 and 15 and FAS 47. No
new requirements are imposed on IP by FAS 129.

     The FASB issued FAS 130,  "Reporting  Comprehensive  Income"  in June 1997,
effective  for  fiscal  years   beginning  after  December  15,  1997.  FAS  130
establishes  standards for reporting and display of comprehensive income and its
components in a financial  statement that is displayed with the same  prominence
as other  financial  statements.  IP  continues  to analyze FAS 130 and does not
expect it to have a significant impact on its financial statements presentation.

     The FASB issued FAS 131,  "Disclosures  about Segments of an Enterprise and
Related  Information"  in June  1997,  effective  for  periods  beginning  after
December 15, 1997. FAS 131 supersedes FAS 14, "Financial  Reporting for Segments
of a Business  Enterprise."  FAS 131  establishes  standards  for the way public
business  enterprises  report financial and descriptive  information about their
reportable  operating  segments  in  their  financial   statements.   Generally,
financial  information  is  required  to be  reported  on the basis that is used
internally  for  evaluating  segment  performance  and  deciding how to allocate
resources to segments.  IP continues to evaluate the  provisions  of FAS 131 and
determine  the  impact  of the  revised  disclosure  requirements  on  its  1998
financial statements.

<PAGE>

Note  2 - Clinton  Power  Station  
Clinton  Operations  
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  and again in June 1997,  the NRC named  Clinton  among  plants
having a trend of declining  performance.  In June 1997, IP committed to conduct
an ISA to thoroughly  assess Clinton's  performance.  The ISA was conducted by a
team of 30  individuals  with  extensive  nuclear  experience and no substantial
previous  involvement  at Clinton.  Their report  concluded  that the underlying
reasons for the  performance  problems at Clinton  were  ineffective  leadership
throughout the  organization in providing  standards of excellence,  complacency
throughout the organization,  barrier weaknesses and weaknesses in teamwork.  In
late October, a team commissioned by the NRC performed an evaluation to validate
the ISA results.  In December,  this team concluded that the findings of the ISA
accurately characterized Clinton's performance deficiencies and their causes.

     In September  1997, the NRC advised IP that it must submit a written report
to the NRC at least two weeks  prior to  restarting  Clinton,  giving the agency
reasonable  assurance that IP's actions to correct  recurring  weaknesses in the
corrective  action program have been  effective.  After the report is submitted,
the NRC  staff  plans to meet  with  IP's  management  to  discuss  the  plant's
readiness for restart.  

     In November  1997,  Larry Haab,  Chief  Executive  Officer of IP,  publicly
pledged to address the findings of the ISA, to improve Clinton,  and provide the
resources necessary to restart the plant.  Further, in January 1998, IP and PECO
announced an agreement  under which PECO will  provide  management  services for
Clinton.  The new  management  team initially will consist of nine people in key
positions, including chief nuclear officer and plant manager.

     Although  a PECO team will help  manage  the  plant,  IP will  continue  to
maintain the operating license for Clinton and retain ultimate  oversight of the
plant. The plant will remain staffed primarily by IP employees.

     PECO  operates  two  stations,  Limerick  and Peach  Bottom,  each with two
boiling  water  reactors  similar to the one at Clinton.  Although  PECO's Peach
Bottom Station was a troubled plant that experienced a two-year  outage,  it was
turned around,  and both plants have set performance  records for long operating
runs and short refueling outages,  receiving excellent  performance ratings from
the NRC and the Institute of Nuclear Power Operations.

     On January 21,  1998,  the NRC placed  Clinton on its Watch  List.  Nuclear
plants are placed on the Watch List when the NRC believes additional  regulatory
oversight is required because of declining  performance.  Clinton will remain on
the Watch List until consistent improved performance is demonstrated. During the
period  Clinton  remains on the Watch List, the NRC will monitor it more closely
than  plants not on the Watch  List.  This may  include  increased  inspections,
additional  required  documentation,  NRC-required  approval  of  processes  and
procedures and higher-level NRC oversight.

 <PAGE>

Transfer  of Soyland's Ownership Share to IP 
In March 1997, the NRC issued an order  approving  transfer to IP of the Clinton
operating  license  related to Soyland's  13.2% ownership in connection with the
transfer from Soyland to IP of all of Soyland's  interest in Clinton.  Soyland's
title  to the  plant  and  directly  related  assets  such as  nuclear  fuel was
transferred to IP in May 1997.  Soyland's nuclear  decommissioning  trust assets
were  transferred to IP in May 1997,  consistent  with IP's assumption of all of
Soyland's ownership obligations, including those related to decommissioning.

     The FERC  approved an amended PCA in July 1997.  The amended PCA  obligates
Soyland to purchase all of its capacity and energy needs from IP for at least 10
years.  The amended PCA  provides  that a contract  cancellation  fee be paid by
Soyland to IP in the event that a Soyland member  terminates its membership from
Soyland.  In  May  1997,  three  distribution   cooperative  members  terminated
membership  by buying out of their  long-term  wholesale  power  contracts  with
Soyland.  As a result,  Soyland paid a fee of $20.8  million to IP in June 1997.
Fee  proceeds  of $2.9  million  were  used to  offset  the  costs of  acquiring
Soyland's  share of  Clinton  with  the  remaining  $17.9  million  recorded  as
interchange revenue.

     In December  1997,  Soyland signed a letter of intent to pay in advance the
remainder of its base capacity charges in the PCA. The fee of approximately  $70
million will be deferred and recognized as interchange  revenue over the initial
term of the PCA. The payment is  contingent  on Soyland  obtaining the necessary
financing and regulatory approvals in 1998.

Clinton  Cost and Risks  
Clinton was placed in service in 1987 and represents approximately 20.3% of IP's
installed   generation   capacity.   The   investment  in  Clinton   represented
approximately  57% of IP's total  assets at  December  31,  1997.  See "Note 1 -
Summary of Significant Accounting Policies" for additional information.

     IP's  Clinton-related  costs  represented  38%  of  its  total  1997  other
operating,   maintenance  and  depreciation   expenses.   Clinton's   equivalent
availability was 0%, 66% and 76% for 1997, 1996 and 1995, respectively.

     Ownership of an operating nuclear generating unit exposes IP to significant
risks,  including  increased and changing  regulatory,  safety and environmental
requirements  and the uncertain future cost of closing and dismantling the unit.
IP expects  to be  allowed to  continue  to  operate  Clinton;  however,  if any
unforeseen or unexpected  developments  would prevent it from doing so, IP would
be materially  adversely affected.  See "Note 3 - Commitments and Contingencies"
for additional information.

Note 3 - Commitments and Contingencies  
Commitments
IP estimates  that it will spend  approximately  $225  million for  construction
expenditures in 1998. IP construction  expenditures for the period 1998-2002 are
expected  to total  about $1 billion.  Additional  expenditures  may be required
during  this  period  to  accommodate  transitional  expenditures  related  to a
competitive  environment,  environmental  compliance  costs and system upgrades,
which cannot be determined at this time. 

     IP's capital  expenditures  for the years 1998 through 2002, in addition to
its construction expenditures,  are expected to include $129 million for nuclear
fuel and $291 million for mandatory debt retirement.

     In addition, IP has substantial  commitments for the purchase of coal under
long-term  contracts.  Estimated coal contract commitments for 1998 through 2002
are $619 million (excluding price escalation  provisions).  Total coal purchases
for 1997,  1996 and 1995 were  $181  million,  $184  million  and $168  million,
respectively. IP has contracts with various natural gas suppliers and interstate
pipelines  to provide  natural gas supply,  transportation  and leased  storage.
Estimated  committed  natural  gas,  transportation  and  leased  storage  costs
(including  pipeline  transition costs) for 1998 through 2002 total $56 million.
Total  natural gas  purchased  for 1997,  1996 and 1995 was $185  million,  $207
million and $150 million, respectively.

<PAGE>

IP's  estimated  nuclear  fuel  commitments  for Clinton are  approximately  $11
million  for  uranium  concentrates  through  2001,  $3 million  for  conversion
services through 2002, $35 million for enrichment services through 1999 and $232
million for  fabrication  services  through  2019.  IP is  committed to purchase
approximately  $20 million of emission  allowances  through 1999. IP anticipates
that  all  gas-related  costs  will be  recoverable  under  IP's  UGAC.  See the
subcaption "Fuel Cost Recovery" below for discussion of the UFAC.

Fuel Cost Recovery On September  29, 1997,  the ICC approved an IP petition that
stipulates  customers will not be charged for certain additional costs of energy
incurred as a result of Clinton being out of service.  Under the petition,  fuel
costs  charged to  customers  will be no higher than  average 1995 - 1996 levels
until Clinton is back in service operating at least at a 65% capacity factor for
two  consecutive  months.  See "Note 2 - Clinton Power  Station"  for additional
information about Clinton.

     As a  result  of  Illinois  deregulation  legislation,  IP  may  choose  to
eliminate  application  of the  UFAC.  IP's base  rates  would  still  include a
component for some level of recovery of fuel costs,  but IP would not be able to
pass  through  to  customers   increased  costs  of  purchasing  fuel,  emission
allowances or replacement  power.  On  elimination of the UFAC,  base rates will
include a fixed fuel cost factor equivalent to the average 1995 - 1996 fuel cost
levels.  Future  recovery of fuel costs is  uncertain,  as IP will decrease base
electric  rates to  residential  customers  beginning  August  1998 and  certain
customers will be free to choose their electric  generation  suppliers beginning
in October 1999.  The extent to which fuel costs are recovered  will depend on a
number of factors  including  the future  market prices for wholesale and retail
energy, when Clinton returns to service,  and whether IP elects to eliminate the
UFAC.

Insurance IP maintains  insurance for certain losses  involving the operation of
Clinton.  For  physical  damage to the plant,  IP's  insurance  program  has two
layers:  1) a primary layer of $500 million provided by nuclear insurance pools;
and 2) an excess  coverage layer of $1.1 billion  provided by an  industry-owned
mutual insurance  company for a total coverage of $1.6 billion.  In the event of
an  accident  with  an  estimated  cost  of  reactor   stabilization   and  site
decontamination  exceeding $100 million,  NRC regulations require that insurance
proceeds be  dedicated  and used first to return the reactor to, and maintain it
in, a safe and stable condition, and second to decontaminate the reactor station
site.   The   insurers   also  provide   coverage  for  the   shortfall  in  the
Decommissioning  Trust  Fund  caused  by the  premature  decommissioning  of the
reactor due to an accident.  In the event insurance  limits are not exhausted by
the above,  the  remaining  coverage  will be applied to  property  damage and a
portion of the value of the  undamaged  property.  In addition,  while IP has no
reason to anticipate a serious nuclear accident at Clinton,  if such an incident
should occur,  the claims for property  damage and other costs could  materially
exceed the limits of current or available insurance coverage. In the event of an
extended  shutdown  of  Clinton  due to  accidental  property  damage,  IP  also
purchases approximately $1.5 million per week of business interruption insurance
coverage through an industry-owned mutual insurance company. This insurance does
not provide coverage until Clinton has been out of service for 21 weeks.

     All  United   States   nuclear   reactor   licensees  are  subject  to  the
Price-Anderson  Act.  This act currently  limits public  liability for a nuclear
incident  to $8.9  billion.  Private  insurance  covers the first $200  million.
Retrospective  premium  assessments against each licensed nuclear reactor in the
United States provide excess coverage. Currently, the liability to these nuclear
reactor  licensees  for such an  assessment  would be up to  $79.3  million  per
incident, not including premium taxes which may be applicable, payable in annual
installments of not more than $10 million.

     A Master Worker Policy covers worker tort claims  alleging  bodily  injury,
sickness or disease due to the nuclear  energy  hazard for workers whose initial
radiation  exposure  occurred  on or after  January 1,  1988.  The policy has an
aggregate limit of $200 million that applies to the commercial  nuclear industry
as a whole. A provision provides for automatic reinstatement of policy limits up
to an additional $200 million.

     IP may be subject to other risks that may not be  insurable,  or the amount
of insurance  carried to offset the various  risks may not be sufficient to meet
potential  liabilities  and losses.  There is also no assurance  that IP will be
able  to  maintain   insurance  coverage  at  its  present  level.  Under  those
circumstances,  such losses or liabilities may have a substantial adverse effect
on IP's financial position.

<PAGE>

Decommissioning  and Nuclear Fuel  Disposal IP is  responsible  for the costs of
decommissioning  Clinton and for spent nuclear fuel disposal costs. In May 1997,
consistent  with IP's  assumption of all of Soyland's  ownership  obligations of
Clinton,  Soyland's nuclear decommissioning trust assets were transferred to IP.
Future  decommissioning  costs related to Soyland's former share of Clinton will
be  provided  through the PCA between  Soyland and IP. IP is  collecting  future
decommissioning  costs for the remaining portion of Clinton through its electric
rates based on an  ICC-approved  formula that allows IP to adjust rates annually
for changes in decommissioning cost estimates. Illinois deregulation legislation
provides for the continued recovery of decommissioning  costs from IP's delivery
customers.

     IP  concluded  a  site-specific  study  in 1996 to  estimate  the  costs of
dismantlement, removal and disposal of Clinton. This study resulted in projected
decommissioning  costs of $538  million  (1996  dollars) or $969  million  (2026
dollars, assuming a 2% inflation factor).  Regulatory approval of this increased
decommissioning  cost level was  received in August 1997.  This  estimate is the
basis used for  funding  decommissioning  costs  through  rates  charged to IP's
customers and through the PCA with Soyland.

     External  decommissioning  trusts,  as  prescribed  under  Illinois law and
authorized  by the ICC,  accumulate  funds  for the  future  decommissioning  of
Clinton  based on the expected  service  life of the plant.  For the years 1997,
1996 and 1995,  IP  contributed  $5.3  million,  $3.9 million and $5.0  million,
respectively,  to its external nuclear decommissioning trust funds. The balances
in these nuclear decommissioning funds at December 31, 1997 and 1996, were $62.5
million and $41.4 million,  respectively.  Decommissioning funds are recorded as
assets  on  the  balance  sheet.  A  decommissioning   liability   approximately
equivalent to trust assets is also recorded. IP recognizes earnings and expenses
from the trust fund as changes in its assets and  liabilities  relating to these
funds occur.

     The FASB is  reviewing  the  accounting  for closure  and removal  costs of
long-lived  assets.  Changes to current  electric  utility  industry  accounting
practices for  decommissioning  may result in recording the estimated total cost
for   decommissioning  as  a  liability  and  an  increase  to  plant  balances,
depreciating the increased plant balances,  and reporting trust fund income from
the  external  decommissioning  trusts as  investment  income  rather  than as a
reduction to decommissioning  expense. Based on current information,  management
believes  that  these  changes  will not have an  adverse  effect on  results of
operations   due  to  existing  and   anticipated   future  ability  to  recover
decommissioning costs through rates.

     Under the Nuclear Waste Policy Act of 1982, the DOE is responsible  for the
permanent storage and disposal of spent nuclear fu el. The DOE currently charges
one mill ($0.001) per net kwh (one dollar per MWH) generated and sold for future
disposal of spent fuel. IP is recovering  these charges  through rates. In 1996,
the  District  of  Columbia  Circuit  Court of Appeals  issued an order,  at the
request of nuclear-owning  utilities and state regulatory  agencies,  confirming
DOE's  unconditional  obligation to take  responsibility  for spent nuclear fuel
commencing  in  1998,  even if it has no  permanent  repository  at  that  time.
Notwithstanding  this  decision,  which  the  DOE did  not  appeal,  the DOE has
indicated to all nuclear  utilities that it may experience delay in performance.
The impact of any such delay on IP will depend on many  factors,  including  the
duration of such delay and the cost and feasibility of interim, on-site storage.

<PAGE>

Environmental Matters
Clean Air Act To comply with the SO2 emission reduction  requirements of Phase I
(1995 - 1999) of the Acid Rain Program of the 1990 Clean Air Act Amendments,  IP
continues  to  purchase  emission  allowances.  An  emission  allowance  is  the
authorization  by the U.S.  EPA to emit one ton of SO2.  The ICC  approved  IP's
Phase I Acid Rain  Compliance  Plan in September  1993,  and IP is continuing to
implement that plan. IP has acquired sufficient emission allowances to meet most
of its  anticipated  needs for 1998 and 1999 and will  purchase the remainder on
the spot market.  In 1993, the Illinois General Assembly passed and the governor
signed  legislation   authorizing,   but  not  requiring,   the  ICC  to  permit
expenditures  and revenues  from  emission  allowance  purchases and sales to be
included in rates charged to customers as a cost of fuel. In December  1994, the
ICC approved the recovery of emission  allowance costs through the UFAC. See the
subcaption  "Fuel  Cost  Recovery"  above  for  discussion  of  the  UFAC.  IP's
compliance plan will defer, until at least 2000, any need for scrubbers or other
capital  projects  associated with SO2 emission  reductions.  Phase II (2000 and
beyond) SO2  emission  reduction  requirements  of the Acid Rain  Program  could
require  additional  actions  and may  result in  capital  expenditures  and the
purchase  of  emission  allowances.  

     To comply with the Phase I NOx emission reduction  requirements of the acid
rain  provisions of the Clean Air Act, IP installed  low-NOx  burners at Baldwin
Unit 3 and  Vermilion  Unit 2. On November 29, 1994,  the Phase I NOx rules were
remanded to the U.S. EPA. On April 13, 1995, the U.S. EPA reinstated,  with some
modifications,  the  Phase  I NOx  rules  effective  January  1,  1996.  IP  was
positioned to comply with these revised rules without  additional  modifications
to any of its generating plants.

     The U.S. EPA issued  revised  Phase II NOx emission  limits on December 10,
1996. IP has prepared a Phase II Compliance Plan.  Litigation over the scope and
legality of these  Phase II NOx limits  precludes  a precise  quantification  of
anticipated capital costs for compliance; however, capital expenditures for IP's
NOx Compliance  Plan are expected to be $100 million prior to the year 2000. The
majority of this  investment  will be directed to Baldwin Units 1 and 2 and will
occur in conjunction with replacement of the air heaters on these units.

     In addition,  regulators are continuing to examine potential approaches for
compliance  with current  federal  ozone air quality  standards.  On November 7,
1997, the U.S. EPA proposed air pollution rules which would require  substantial
reductions of NOx emissions in Illinois and 21 other states.  The proposal would
require the  installation  of NOx controls by September  2002.  This proposal is
expected  to be  finalized  by November  1998 with  Illinois  utility  reduction
requirements  specified in 1999.  Preliminary  cost estimates to comply with the
proposed NOx  limitations are $130 to $150 million beyond what is already needed
to comply with the NOx  requirements  of Phase II of the Acid Rain Program.  The
legality of this proposal along with its technical feasibility is expected to be
challenged by a number of utilities and utility groups, including IP.

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  1990  levels  during  the years  2008  through  2012 and to make  further
reductions  thereafter.  This  Protocol  must be ratified  by the United  States
Senate.  United States Senate  Resolution 98 (passed 95-0)  indicates the Senate
would not  ratify an  agreement  that fails to involve  all  countries  or would
damage the United States economy.  Ratification  will be a major political issue
as the Protocol  does not contain key elements  that Senate  Resolution  98 said
would be necessary for ratification. It is anticipated that ratification will be
delayed until after 1998.

     IP will face major  changes in how 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 IP.

<PAGE>

Manufactured-Gas  Plant IP's estimated liability for MGP site remediation is $65
million.  This amount represents IP's current best estimate of the costs that it
will  incur in  remediation  of the 24 MGP sites  for  which it is  responsible.
Because of the  unknown  and  unique  characteristics  at each  site,  IP cannot
presently determine its ultimate liability for remediation of the sites.

     IP is currently  recovering  MGP site  remediation  through  tariff  riders
approved by the ICC.  Accordingly,  IP has  recorded a  regulatory  asset on its
balance sheet totaling $65 million as of December 31, 1997.  Management  expects
that cleanup costs will be fully recovered from IP's customers.

     To offset the burden imposed on its customers,  IP has initiated litigation
against a number of  insurance  carriers.  Any  settlement  proceeds  or damages
recovered  from the  carriers  will  continue to be  credited to IP's  customers
through the tariff rider mechanism which the ICC previously approved.

Electric and Magnetic Fields The possibility that exposure to EMF emanating from
power  lines,  household  appliances  and other  electric  sources may result in
adverse  health   effects   continues  to  be  the  subject  of  litigation  and
governmental,  medical and media attention. Litigants also have claimed that EMF
concerns  justify recovery from utilities for the loss in value of real property
exposed to power lines, substations and other such sources of EMF. The number of
EMF cases has declined in the last few years as more national and  international
science  commissions  have  concluded  that an EMF  health  risk  has  not  been
established.  Additional  research  is being  conducted  to  attempt  to resolve
continuing scientific  uncertainties.  On July 3, 1997, President Clinton signed
legislation   extending  the  National  EMF  Research  and  Public   Information
Dissemination  Program  through 1998.  Research  results,  policy  decisions and
public information  developments will continue into 1999. It is too soon to tell
what,  if any,  impact these  actions may have on IP's  financial  position.  IP
continues its commitment to address  customer and employee  concerns  related to
the EMF issue.

Other 
Legal Proceedings IP is involved in legal or administrative  proceedings  before
various  courts and agencies  with respect to matters  occurring in the ordinary
course  of  business,  some of  which  involve  substantial  amounts  of  money.
Management  believes that the final  disposition of these  proceedings  will not
have a material  adverse effect on the  consolidated  financial  position or the
results of operations.

Accounts  Receivable IP sells  electric  energy and natural gas to  residential,
commercial and industrial customers  throughout Illinois.  At December 31, 1997,
72%,  17% and 11% of  "Accounts  receivable  - Service"  were from  residential,
commercial and industrial  customers,  respectively.  IP maintains  reserves for
potential   credit  losses  and  such  losses  have  been  within   management's
expectations.  During 1997, IP increased its reserve for doubtful  accounts from
$3.0 million to $5.5 million.

Contingencies 
Soyland In March 1997, the NRC issued an order  approving  transfer to IP of the
Clinton  operating  license  related to Soyland's  13.2% ownership in connection
with the transfer from Soyland to IP of all of Soyland's interest in Clinton.

     The FERC  approved an amended PCA in July 1997.  The amended PCA  obligates
Soyland to purchase all of its capacity and energy needs from IP for at least 10
years (the initial term of the PCA) and includes a provision that allows Soyland
to pay its base capacity charges in advance.  The amended PCA also provides that
a  contract  cancellation  fee will be paid by Soyland to IP in the event that a
Soyland  Cooperative member terminates its membership from Soyland. In May 1997,
three distribution cooperative members terminated their membership by buying out
of their  respective  long-term  wholesale  power  contracts with Soyland.  As a
result,  Soyland  paid a fee of $20.8  million  to IP in June 1997 to reduce its
future base capacity charges.

     In December,  1997, Soyland signed a letter of intent to pay in advance the
remainder of its base capacity charges in the PCA. The fee of approximately  $70
million will be deferred and recognized as interchange  revenue over the initial
term of the PCA.  The  payment  will be  contingent  on  Soyland  obtaining  the
necessary financing and regulatory approvals in 1998.

Nuclear Fuel Lease See "Note 7 - Capital Leases" for discussion of contingencies
related to IP's nuclear fuel lease.

Internal  Revenue  Service  Audit The  Internal  Revenue  Service  is  currently
auditing  IP's federal  income tax returns for the years 1991 through  1993.  At
this time,  the outcome of the audit cannot be determined;  however,  management
does not expect that the  results  will have a material  adverse  effect on IP's
financial position or results of operations. For a detailed discussion of income
taxes, see "Note 6 - Income Taxes."

<PAGE>

Note 4 - Lines of Credit and Short-Term Loans
IP has total lines of credit  represented by bank commitments  amounting to $354
million,  all of which were unused at December 31,  1997.  These lines of credit
are  renewable  in May 1998,  August 1998 and May 2002.  These bank  commitments
support the amount of commercial paper outstanding at any time,  limited only by
the amount of unused bank  commitments,  and are  available to support  other IP
activities.

     IP pays  facility  fees up to .10% per annum on $350  million  of the total
lines of credit,  regardless of usage.  The interest  rate on  borrowings  under
these  agreements is, at IP's option,  based upon the lending  banks'  reference
rate, their  Certificate of Deposit rate, the borrowing rate of key banks in the
London interbank market or competitive bid.

     IP has letters of credit totaling $206 million and pays fees up to .45% per
annum on the unused amount of credit.

     In  addition,  IP and the Fuel  Company  each have a  short-term  financing
option to obtain funds not to exceed $30 million. IP and the Fuel Company pay no
fees for this uncommitted  facility and funding is subject to availability  upon
request.

     For the years 1997, 1996 and 1995, IP had short-term  borrowings consisting
of bank  loans,  commercial  paper,  extendible  floating  rate  notes and other
short-term debt outstanding at various times as follows:

(Millions of dollars, except rates)               1997      1996     1995
Short-term borrowings
  at December 31,                              $  376.8  $  310.0  $  359.6   
Weighted average interest                                                     
  rate at December 31,                              6.0%      5.7%      6.0%  
Maximum amount                                                                
  outstanding                                                                 
  at any month end                             $  376.8  $  310.0  $  359.6   
Average daily borrowings                                                      
  outstanding during                                                          
  the year                                     $  284.4  $  261.9  $  306.5   
Weighted average interest                                                     
  rate during the year                              5.8%      5.6%      6.2%  
                                                                              
     Interest rate cap  agreements  are used to reduce the  potential  impact of
increases in interest  rates on  floating-rate  debt.  IP has two variable  rate
interest rate cap agreements  covering up to $114.6 million of commercial paper.
These agreements  entitle IP to receive from a counterparty on a quarterly basis
the amount,  if any,  by which IP's  interest  payments  on a nominal  amount of
commercial  paper exceed the interest rate set by the cap. On December 31, 1997,
the cap rates were set at 7.75% and 8.0% while the current market rate available
to IP was 5.8%.

     IP also has a $50 million interest rate swap in effect through October 1998
where IP pays 5.92% and receives the LIBOR variable rate, payable quarterly.

Note  5 - Facilities  Agreements 
On March 13,  1997,  the NRC  issued an order  approving  transfer  to IP of the
Clinton  operating  license related to Soyland's 13.2% ownership  obligations in
connection with the transfer from Soyland to IP of all of Soyland's  interest in
Clinton pursuant to an agreement  reached in 1996.  Soyland's title to the plant
and directly related assets such as nuclear fuel was transferred to IP on May 1,
1997. Soyland's nuclear  decommissioning  trust assets were transferred to IP on
May 19, 1997,  consistent  with IP's  assumption  of all of Soyland's  ownership
obligations including those related to decommissioning.

     The FERC approved an amended PCA between  Soyland and IP in July 1997.  The
amended PCA  obligates  Soyland to purchase all of its capacity and energy needs
from IP for at  least  10  years.  The  amended  PCA  provides  that a  contract
cancellation  fee will be paid by  Soyland  to IP in the  event  that a  Soyland
member  terminates its membership in Soyland.  In May 1997,  three  distribution
cooperative   members  terminated  their  membership  by  buying  out  of  their
respective  long-term  wholesale  power  contracts  with  Soyland.  This  action
resulted in Soyland  paying a fee of $20.8  million to IP in June 1997 to reduce
its future base  capacity  charges.  Fee  proceeds of $2.9  million were used to
offset the costs of  acquiring  Soyland's  share of Clinton  with the  remaining
$17.9 million recorded as interchange  revenue. In December 1997, Soyland signed
a letter of intent to pay in advance the remainder of its base capacity  charges
in the PCA. The fee of approximately $70 million will be deferred and recognized
as  interchange  revenue  over the initial  term of the PCA. The payment will be
contingent on Soyland obtaining the necessary financing and regulatory approvals
in 1998.

<PAGE>

Note 6 -  Income  Taxes  
Deferred tax assets and liabilities were comprised of the following:

                                                    Balances as of December 31,
(Millions of dollars)                                       1997        1996
Deferred tax assets:
Current:
  Misc. book/tax recognition differences               $     11.2  $      7.7  
Noncurrent:                                                                    
  Depreciation and other property related                    46.2        42.0  
  Alternative minimum tax                                   156.8       198.5  
  Tax credit and net operating loss                                            
    carryforward                                              -          32.8  
  Unamortized investment tax credit                         116.9       120.9  
  Misc. book/tax recognition differences                     40.3        65.8  
                                                            360.2       460.0  
    Total deferred tax assets                          $    371.4  $    467.7  
                                                                               
Deferred tax liabilities:                                                      
Current:                                                                       
  Misc. book/tax recognition differences               $       .9  $     11.3  
Noncurrent:                                                                    
  Depreciation and other property related                 1,348.0     1,350.1  
  Deferred Clinton costs                                      -          58.2  
  Misc. book/tax recognition differences                     (7.1)       99.7  
                                                          1,340.9     1,508.0  
    Total deferred tax liabilities                     $  1,341.8  $  1,519.3  
                                                                               

Income taxes  included in the  Consolidated  Statements of Income consist of the
following components:

                                           Years Ended December 31,
(Millions of dollars)                     1997       1996      1995
Current taxes-
  Included in operating
    expenses and taxes                 $   72.7  $   79.2  $   98.6
  Included in other income
    and deductions                          (.7)    (14.5)    (20.3)
  Total current taxes                      72.0      64.7      78.3
Deferred taxes-
  Included in operating
  expenses and taxes
    Property related differences            9.2      60.4      62.2
    Alternative minimum tax                41.7       1.1       2.9
    Gain/loss on reacquired debt             .4      (1.6)     (1.9)
    Net operating loss
      carryforward                          -         -         (.2)
    Enhanced retirement
      and severance                          .5       2.6     (15.0)
    Misc. book/tax recognition
      differences                         (16.7)      6.1     (13.9)
    Included in other income
      and deductions
        Property related differences        (.4)     10.2       9.7
        Misc. book/tax recognition
          differences                       1.5       1.7       2.2
    Total deferred taxes                   36.2      80.5      46.0
Deferred investment
tax credit-net
  Included in operating
    expenses and taxes                     (7.3)     (7.3)     (6.9)
  Total investment tax credit              (7.3)     (7.3)     (6.9)
Total income taxes from
  continuing operations                $  100.9  $  137.9  $  117.4
Income tax -
  Extraordinary item
    Current tax expense                   (17.8)      -         -
    Deferred tax expense                 (100.2)      -         -
    Total extraordinary item             (118.0)      -         -
Total income taxes                     $  (17.1) $  137.9  $  117.4

<PAGE>

     The  reconciliations  of income tax expense to amounts computed by applying
the statutory tax rate to reported pretax income from continuing  operations for
the period are set below:

                                                       Years Ended December 31,
(Millions of dollars)                               1997      1996      1995
Income tax expense at the
  federal statutory tax rate                     $   88.1  $  128.3  $  105.0
Increases/(decreases) in taxes resulting from-
  State taxes,
    net of federal effect                            11.8      13.7      14.0
  Investment tax credit
    amortization                                     (7.3)     (7.3)     (6.9)
Depreciation not normalized                          11.3       9.4       7.4
Interest expense on
    preferred securities                             (6.9)     (6.9)     (3.7)
Other-net                                             3.9        .7       1.6
Total income taxes from
  continuing operations                          $  100.9  $  137.9  $  117.4

     Combined federal and state effective income tax rates were 40.1%, 37.6% and
39.1% for the years 1997, 1996 and 1995, respectively.

     IP is subject to the provisions of the Alternative Minimum Tax System. As a
result,  IP has an Alternative  Minimum Tax credit  carryforward at December 31,
1997,  of  approximately  $156.8  million.  This  credit can be carried  forward
indefinitely  to offset future regular  income tax  liabilities in excess of the
tentative minimum tax.

     The  Internal  Revenue  Service is  currently  auditing  IP's  consolidated
federal  income tax returns for the years 1991 through 1993.  At this time,  the
outcome of the audit cannot be determined; however, the results of the audit are
not expected to have a material  adverse effect on IP's  consolidated  financial
position or results of operations.

     Because of the  passage of HB 362,  IP's  electric  generation  business no
longer  meets the criteria  for  application  of FAS 71. As required by FAS 101,
"Regulated  Enterprises - Accounting for the  Discontinuation  of Application of
FASB  Statement  No. 71", the income tax effects of the  write-off of regulatory
assets and  liabilities  related to electric  generation  are  reflected  in the
extraordinary  item  for  the  cumulative  effect  of  a  change  in  accounting
principle.

Note 7 - Capital  Leases 
The Fuel  Company,  which is 50% owned by IP, was formed in 1981 for the purpose
of leasing nuclear fuel to IP for Clinton.  Lease payments are equal to the Fuel
Company's   cost  of  fuel  as  consumed   (including   related   financing  and
administrative costs).  Billings under the lease agreement during 1997, 1996 and
1995 were $4  million,  $35  million and $41  million,  respectively,  including
financing costs of $4 million,  $5 million and $7 million,  respectively.  IP is
required to pay financing costs whether or not fuel is consumed. IP is obligated
to make  subordinated  loans to the Fuel Company at any time the  obligations of
the Fuel Company that are due and payable exceed the funds available to the Fuel
Company.  Lease terms stipulate that in the event that Clinton is out of service
for 24 consecutive  months,  IP will be obligated to purchase  Clinton's incore
nuclear fuel for $62 million from the Fuel  Company.  IP has an  obligation  for
nuclear fuel disposal  costs of leased  nuclear fuel.  See "Note 3 - Commitments
and Contingencies"  for discussion of decommissioning  and nuclear fuel disposal
costs.  Nuclear fuel lease payments are included with "Fuel for electric plants"
on IP's Consolidated Statements of Income.

     At December 31, 1997 and 1996, current  obligations under capital lease for
nuclear fuel are $18.7 million and $36.9 million, respectively.

     Over the next five years  estimated  payments  under capital  leases are as
follows:

                                                       (Millions of dollars)
1998                                                        $           23.5
1999                                                                    44.3
2000                                                                    23.9
2001                                                                    21.5
2002                                                                    16.7
Thereafter                                                              12.8
                                                                       142.7
Less-Interest                                                           16.0
  Total                                                            $   126.7

<PAGE>


Note 8 - Long-Term Debt
<TABLE>
<S>                                                                                               <C>                     <C>      
                                                                                                              (Millions of dollars)
December 31,                                                                                                 1997            1996
First mortgage bonds-
  6 1/2%       series due 1999                                                                     $  72.0                 $  72.0
  6.60%        series due 2004 (Pollution Control Series A)                                            6.3                     6.5
  7.95%        series due 2004                                                                        72.0                    72.0
  6%           series due 2007 (Pollution Control Series B)                                           18.7                    18.7
  7 5/8%       series due 2016 (Pollution Control Series F, G and H)                                   -                     150.0
  8.30%        series due 2017 (Pollution Control Series I)                                           33.8                    33.8
  7 3/8%       series due 2021 (Pollution Control Series J)                                           84.7                    84.7
  8 3/4%       series due 2021                                                                        57.1                    57.1
  5.70%        series due 2024 (Pollution Control Series K)                                           35.6                    35.6
  7.40%        series due 2024 (Pollution Control Series L)                                           84.1                    84.1
  Total first mortgage bonds                                                                         464.3                   614.5
New mortgage bonds-
  6 1/8%       series due 2000                                                                        40.0                    40.0
  5 5/8%       series due 2000                                                                       110.0                   110.0
  6 1/2%       series due 2003                                                                       100.0                   100.0
  6 3/4%       series due 2005                                                                        70.0                    70.0
  8%           series due 2023                                                                       229.0                   229.0
  7 1/2%       series due 2025                                                                       177.0                   177.0
  Adjustable rate series due 2028 (Pollution Control Series M, N and O)                              111.8                   111.8
  Adjustable rate series due 2032 (Pollution Control Series P, Q and R)                              150.0                     -  
  Total new mortgage bonds                                                                           987.8                   837.8
  Total mortgage bonds                                                                             1,452.1                 1,452.3
Medium-term notes, series A                                                                           68.0                    78.5
Variable rate long-term debt due 2017                                                                 75.0                    75.0
  Total other long-term debt                                                                         143.0                   153.5
                                                                                                   1,595.1                 1,605.8
Unamortized discount on debt                                                                         (16.8)                  (18.1)
  Total long-term debt excluding capital lease obligations                                         1,578.3                 1,587.7
  Obligations under capital leases                                                                   126.7                   96.4
                                                                                                   1,705.0                 1,684.1
Long-term debt and lease obligations maturing within one year                                        (87.5)                  (47.7)
  Total long-term debt                                                                     $       1,617.5            $    1,636.4
</TABLE>

In April 1997, IP  refinanced  $150 million of 7 5/8% First  Mortgage  Bonds due
2016 as Adjustable Rate New Mortgage Bonds due 2032. 

In 1989 and  1991,  IP  issued a series  of fixed  rate  medium-term  notes.  At
December 31, 1997,  these notes had interest  rates ranging from 9% to 9.31% and
will mature at various dates in 1998.  Interest rates on variable rate long-term
debt due 2017 are adjusted  weekly and ranged from 4.35% to 4.6% at December 31,
1997.

For the years 1998,  1999, 2000, 2001 and 2002, IP has long-term debt maturities
and cash sinking fund  requirements  in the  aggregate of (in  millions)  $68.8,
$72.8,  $150.8, $.8 and $.8,  respectively.  These amounts exclude capital lease
requirements. See "Note 7 - Capital Leases." 

At December  31,  1997,  the  aggregate  total of  unamortized  debt expense and
unamortized loss on reacquired debt was approximately $50.4 million.

In 1992,  IP  executed a new  general  obligation  mortgage  (New  Mortgage)  to
replace, over time, IP's 1943 Mortgage and Deed of Trust (First Mortgage).  Both
mortgages  are  secured  by liens on  substantially  all of IP's  properties.  A
corresponding  issue of First Mortgage bonds, under the First Mortgage,  secures
any  bonds  issued  under  the New  Mortgage.  In  October  1997,  at a  special
bondholders  meeting,  the 1943  First  Mortgage  was  amended  to be  generally
consistent  with  the  New  Mortgage.  The  remaining  balance  of net  bondable
additions at December 31, 1997, was approximately $1.8 billion.

<PAGE>

Note 9 - Preferred Stock
<TABLE>
<S>                                                                                               <C>                   <C>   
                                                                                                             (Millions of dollars)
December 31,                                                                                          1997                    1996
Serial Preferred Stock, cumulative, $50 par value-
Authorized 5,000,000 shares; 1,139,110 and 1,221,700 shares outstanding, respectively
  Series      Shares             Redemption Prices
  4.08%       283,290             $   51.50                                                       $   14.1               $    15.0
  4.26%       136,000                 51.50                                                            6.8                     7.5
  4.70%       176,000                 51.50                                                            8.8                    10.0
  4.42%       134,400                 51.50                                                            6.7                     7.5
  4.20%       167,720                 52.00                                                            8.4                     9.0
  7.75%       241,700                 50.00 after July 1, 2003                                        12.1                    12.1
   Net premium on preferred stock                                                                       .2                      .2
  Total Preferred Stock, $50 par value                                                           $    57.1               $    61.3

Serial Preferred Stock, cumulative, without par value-
Authorized 5,000,000 shares; 0 and 698,200 shares outstanding, respectively
  Series      Shares      Redemption Prices
    A           -                 -                                                             $      -                 $    34.9
  Total Preferred Stock, without par value                                                      $      -                 $    34.9

Preference Stock, cumulative, without par value-
Authorized 5,000,000 shares; none outstanding                                                          -                       -
  Total Serial Preferred Stock, Preference Stock and Preferred Securities                       $     57.1               $    96.2

Company Obligated Mandatorily Redeemable Preferred Securities of:
Illinois Power Capital, L.P.
Monthly Income Preferred Securities, cumulative, $25 liquidation preference-
3,880,000 shares authorized and outstanding                                                     $     97.0               $    97.0

Illinois Power Financing I
Trust Originated Preferred Securities, cumulative, $25 liquidation preference-
4,000,000 shares authorized and outstanding                                                          100.0                   100.0

  Total Mandatorily Redeemable Preferred Stock                                                  $    197.0               $   197.0

</TABLE>

Serial  Preferred  Stock  ($50 par value) is  redeemable  at the option of IP in
whole or in part at any time  with  not less  than 30 days and not more  than 60
days notice by publication. The MIPS are redeemable at the option in whole or in
part on or after October 6, 1999 with not less than 30 days and not more than 60
days  notice by  publication.  The TOPrS  mature on January  31, 2045 and may be
redeemed in whole or in part at any time on or after January 31, 2001.

Quarterly  dividend rates for Serial Preferred  Stock,  Series A, are determined
based on market interest rates of certain U.S.  Treasury  securities.  Dividends
paid in 1997 and 1996 were $.75 per share per quarter.

Illinois Power Capital,  L.P., is a limited  partnership in which IP serves as a
general   partner.   Illinois   Power  Capital  issued  (1994)  $97  million  of
tax-advantaged   MIPS  at  9.45%  (5.67%  after-tax  rate)  with  a  liquidation
preference  of $25 per share.  IP  consolidates  the accounts of Illinois  Power
Capital.

Illinois Power  Financing I is a statutory  business trust in which IP serves as
sponsor.  IPFI issued (1996) $100 million of TOPrS at 8% (4.8% after-tax  rate).
IP consolidates the accounts of IPFI.

On September  29, 1997,  IP issued a notice of  redemption to all holders of its
Adjustable Rate Series A Preferred  Stock.  All 698,200 shares  outstanding were
redeemed  on  November  1,  1997,  at the price of $50 per  share.  In 1997,  IP
redeemed $4.2 million of various issues of Serial  Preferred Stock. The carrying
amount was $.2 million  over  consideration  paid and was recorded in equity and
included in Net income applicable to common stock.

<PAGE>

Note 10 - Common Stock 
and Retained  Earnings 
On May 31, 1994, common shares of IP began trading as common shares of Illinova.
Illinova is the sole shareholder of IP common stock.

     In 1997, IP repurchased 6,017,748 shares of its common stock from Illinova.
In  1996  and  1995,  IP  repurchased   714,811  shares  and  2,696,086  shares,
respectively, of its common stock from Illinova. Under Illinois law, such shares
may be held as treasury stock and treated as authorized but unissued,  or may be
canceled by resolution  of the Board of Directors.  IP holds the common stock as
treasury stock and deducts it from common equity at the cost of the shares.

     IP employees participate in an ESOP that includes an incentive compensation
feature which is tied to achievement of specified  corporate  performance goals.
This arrangement  began in 1991 when IP loaned $35 million to the Trustee of the
Plans,  which used the loan proceeds to purchase 2,031,445 shares of IP's common
stock on the open market.  The loan and common shares were converted to Illinova
instruments with the formation of Illinova in May 1994. These shares are held in
a suspense account under the Plans and are being  distributed to the accounts of
participating  employees  as the  loan  is  repaid  by the  Trustee  with  funds
contributed by IP,  together with dividends on the shares acquired with the loan
proceeds.  IP  financed  the loan with  funds  borrowed  under  its bank  credit
agreements.

     For the year ended  December 31, 1997,  91,282 common shares were allocated
to  salaried  employees  and  83,418  shares  to  employees  covered  under  the
Collective Bargaining Agreement through the matching contribution feature of the
ESOP arrangement. Under the incentive compensation feature, 70,720 common shares
were allocated to employees for the year ended  December 31, 1997.  During 1997,
IP contributed $5.0 million to the ESOP and, using the shares allocated  method,
recognized  $3.3  million  of  expense.  Interest  paid  on the  ESOP  debt  was
approximately  $1.3  million in 1997 and  dividends  used for debt  service were
approximately $2.3 million.

     In 1992,  the Board of Directors  adopted and the  shareholders  approved a
Long-Term  Incentive  Compensation  Plan (the  Plan) for  officers  or  employee
members of the Board, but excluding directors who are not officers or employees.
The types of awards  that may be granted  under the Plan are  restricted  stock,
incentive stock options, non-qualified stock options, stock appreciation rights,
dividend  equivalents and other stock-based  awards.  The Plan provides that any
one or more  types of  awards  may be  granted  for up to  1,500,000  shares  of
Illinova's  common stock.  The following  table outlines the activity under this
plan at December 31, 1997. Of the options  granted in 1992,  1993, 1994 and 1995
in the table below, 7,500, 10,500, 4,400 and 6,500 options,  respectively,  have
been  forfeited  and are not  exercisable.  An  additional  20,000  options were
exercised in January 1998.

Year        Options     Grant          Year         Expiration     Options
Granted     Granted     Price       Exercisable        Date        Exercised
1992         62,000   $ 23 3/8         1996           6/10/01        38,000
1993         73,500   $ 24 1/4         1997           6/09/02            - 
1994         82,650   $ 20 7/8         1997           6/08/03            - 
1995         69,300   $ 24 7/8         1998           6/14/04            - 
1996         80,500   $ 29 3/4         1999           2/07/05            - 
1997         82,000   $ 26 1/8         2000           2/12/07            - 
                                                                           
     In October  1995,  the FASB  issued FAS 123,  "Accounting  for  Stock-Based
Compensation"  effective  for fiscal years  beginning  after  December 15, 1995.
Based on the current and anticipated use of stock options, the impact of FAS 123
is not material on the current  period and is not  envisioned  to be material in
any future  period.  IP continues to account for its stock options in accordance
with Accounting Principle Board Opinion No. 25.

     The  provisions  of  Supplemental   Indentures  to  IP's  General  Mortgage
Indenture and Deed of Trust  contain  certain  restrictions  with respect to the
declaration  and  payment  of  dividends.  IP was not  limited  by any of  these
restrictions at December 31, 1997. Under the Restated Articles of Incorporation,
common stock dividends are subject to the preferential  rights of the holders of
preferre d and preference stock.

Note 11 -Pension and Other Benefit Costs  
Illinova   offers  certain  benefit  plans  to  the  employees  of  all  of  its
subsidiaries. IP is sponsor and administrator of all of the benefit plans. IP is
reimbursed by the other Illinova subsidiaries for their share of the expenses of
the benefit  plans.  The  discussion  and amounts  below  represent the plans in
total, including the amounts attributable to the other subsidiaries.

     IP has  defined-benefit  pension plans covering all officers and employees.
Benefits are based on years of service and compensation.  IP's funding policy is
to  contribute  annually at least the  minimum  amount  required  by  government
funding  standards,  but not more than can be deducted  for  federal  income tax
purposes.

<PAGE>

     Pension costs, a portion of which have been  capitalized for 1997, 1996 and
1995, include the following components:

                                                      Years Ended December 31, 
(Million of dollars)                                   1997     1996     1995 
Service cost on benefits
  earned during the year                             $  10.1  $  10.2  $  10.4
Interest cost on projected                                                    
  benefit obligation                                    27.9     26.8     23.6
Return on plan assets                                  (95.6)   (42.2)   (58.3)
Net amortization and deferral                           61.5      9.4     29.6
Effect of enhanced retirement                                                 
  program                                                -        -       15.7
Net periodic pension cost                            $   3.9  $   4.2  $  21.0
                                                      
     The  estimated  funded  status of the plans at December  31, 1997 and 1996,
using discount  rates of 7.5% and 8.0%,  respectively,  and future  compensation
increases of 4.5% was as follows:

                                                  Balances as of December 31,  
(Millions of dollars)                                     1997      1996 
Actuarial present value of:
  Vested benefit obligation                            $ (329.7) $ (291.7)    
  Accumulated benefit obligation                         (350.6)   (312.5)    
Projected benefit obligation                             (412.8)   (361.5)    
Plan assets at fair value                                 432.1     357.2     
  Funded status                                            19.3      (4.3)    
  Unrecognized net (gain)/loss                            (39.1)    (13.8)    
  Unrecognized net asset at transition                    (26.1)    (30.3)    
  Unrecognized prior service cost                          17.4      19.3     
Accrued pension cost included in                                              
  deferred credits                                     $  (28.5) $  (29.1)    
                                                       
     The  plans'  assets  consist  primarily  of  common  stocks,  fixed  income
securities,  cash  equivalents,  alternative  investments  and real estate.  The
actuarial  present  values of  accumulated  plan benefits at January 1, 1997 and
1996,  were  $375  million  and $361  million,  respectively,  including  vested
benefits of $353 million and $337  million,  respectively.  The pension cost for
1997,  1996 and 1995 was  calculated  using a discount  rate of 8.0%,  7.75% and
8.75%,  respectively;  future compensation  increases of 4.5% for 1997, 1996 and
1995;  and a return on assets of 9.5% for 1997 and 1996,  and 9.0% for 1995. The
unrecognized net asset at transition and the unrecognized prior service cost are
amortized on a straight-line  basis over the average remaining service period of
employees  who are  expected to receive  benefits  under the plan.  IP made cash
contributions of $5 million in 1997, $6 million in 1996 and $2 million in 1995.

     IP provides  health  care and life  insurance  benefits to certain  retired
employees,  including their eligible  dependents,  who attain specified ages and
years of service under the terms of the  defined-benefit  plans.  Postretirement
benefits,  a portion of which have been capitalized,  for 1997 and 1996 included
the following components:
                                                       Years Ended December 31,
(Millions of dollars)                                     1997       1996
Service cost on benefits earned
  during the year                                       $  1.9     $  2.2      
Interest cost on projected                                                  
  benefit obligation                                       5.9        6.1      
Return on plan assets                                     (8.0)      (5.9)     
Amortization of unrecognized                                                
  transition obligation                                    7.4        6.4      
Net periodic postretirement                                                 
  benefit cost                                          $  7.2     $  8.8      
                                                        
     The  net  periodic  postretirement  benefit  cost  in the  preceding  table
includes amortization of the previously unrecognized accumulated  postretirement
benefit  obligation,  which was $41.4 million and $44.2 million as of January 1,
1997 and 1996, respectively, over 20 years on a straight-line basis.

     IP has  established two separate trusts for those retirees who were subject
to a  collectively  bargained  agreement and all other  retirees to fund retiree
health care and life  insurance  benefits.  IP's funding policy is to contribute
annually an amount at least equal to the  revenues  collected  for the amount of
postretirement benefit costs allowed in rates. The plan assets consist of common
stocks and fixed income  securities at December 31, 1997 and 1996. The estimated
funded status of the plans at December 31, 1997 and 1996, using weighted average
discount rates of 7.0% and 8.0%,  respectively,  and a return on assets of 9.0%,
was as follows:

                                               Balances  as of  December  31,  
(Millions  of  dollars)                                1997     1996  
Accumulated postretirement 
benefit obligation
  Current retirees                                  $ (51.1) $ (49.6)  
  Current employees - fully eligible                   (5.5)    (3.5)  
  Current employees - not fully eligible              (32.8)   (28.6)  
    Total benefit obligation                          (89.4)   (81.7)  
Plan assets at fair value                              49.7     34.4   
Funded status                                         (39.7)   (47.3)  
Unrecognized transition obligation                     38.7     41.4   
Unrecognized net (gain)/loss                           (6.3)    (7.1)  
Accrued postretirement benefit cost                                    
  included in deferred credits                      $  (7.3) $ (13.0)  
                                                    
     The pre-65  health-care-cost  trend rate  decreases  from 7.1% to 5.5% over
nine years and the post-65  health-care-cost trend rate is level at 1.5%. A 1.0%
increase in each future year's assumed  health-care-cost  trend rates  increases
the  service  and  interest  cost  from $7.8  million  to $8.7  million  and the
accumulated  postretirement  benefit  obligation  from  $89.4  million  to $99.9
million.

<PAGE>

Note 12 -  Segments  of Business
Illinois  Power  Company  is  a  public  utility   engaged  in  the  generation,
transmission,  distribution and sale of electric energy,  and the  distribution,
transportation  and  sale  of  natural  gas.  The  following  is  a  summary  of
operations:
<TABLE>
<S>                        <C>         <C>      <C>        <C>        <C>      <C>         <C>       <C>      <C>

                                                                                                               (Millions of dollars)
                                          1997                           1996                           1995
                                                   Total                           Total                          Total
                              Electric     Gas     Company    Electric    Gas     Company    Electric   Gas      Company
Operation information -
Operating revenues          $  1,420.0 $  353.9 $  1,773.9 $  1,340.5 $  348.2 $  1,688.7 $  1,368.9 $  272.5 $  1,641.4
Operating expenses,
  excluding provision
  for income taxes             1,081.3    311.5    1,392.8      886.2    300.5    1,186.7      946.2    245.0    1,191.2
Pre-tax operating income         338.7     42.4      381.1      454.3     47.7      502.0      422.7     27.5      450.2
AFUDC                              4.9       .1        5.0        6.3       .2        6.5        5.5       .5        6.0
Pre-tax operating income,
  including AFUDC           $    343.6 $   42.5 $    386.1 $    460.6 $   47.9 $    508.5 $    428.2 $   28.0 $    456.2
  Other deductions, net                                5.7                            9.0                            8.1
  Interest charges                                   128.7                          133.0                          148.0
  Provision for
    income taxes                                     100.9                          137.9                          117.4
  Net income                                         150.8                          228.6                           182.7
  Extraordinary item
    (net of taxes)                                  (195.0)                           -                              -
  Preferred dividend
    requirements                                     (21.5)                         (22.3)                          (23.7)
  Carrying value over
    (under) consideration
    paid for redeemed
    preferred stock                                     .2                            (.7)                          (3.5)
Net income (loss) applicable
  to common stock                                   $(65.5)                        $205.6                         $155.5
Other information -
  Depreciation                171.5 $     24.1 $    195.6 $    164.0 $     22.5 $   186.5 $    161.4 $   21.6     $183.0
  Capital expenditures     $  201.3 $     22.6 $    223.9 $    164.0 $     23.3 $   187.3 $    185.7 $   23.6     $209.3
Investment information -
  Identifiable assets*     $4,508.1 $    453.8    4,961.9 $  4,577.1 $    481.9 $ 5,059.0 $  4,580.4 $    446.3 $5,026.7
  Nonutility plant and
    other investments                                 5.7                            14.3                           16.2
  Assets utilized for
    overall operations                              323.9                           495.2                          524.3       
Total assets                                     $5,291.5                        $5,568.5                       $5,567.2
</TABLE>

<PAGE>

Note 13 - Fair Value of Financial Instruments
                                        1997                   1996
                                Carrying    Fair        Carrying    Fair
(Millions of dollars)           Value       Value       Value       Value
Nuclear decommissioning
  trust funds               $     62.5 $     62.5 $     41.4 $     41.4
Cash and cash equivalents         17.8       17.8       12.5       12.5
Mandatorily redeemable
  preferred stock                197.0      202.7      197.0      199.3
Long-term debt                 1,578.3    1,627.6    1,587.7    1,629.3
Notes payable                    376.8      376.8      310.0      310.0

     The following  methods and assumptions were used to estimate the fair value
of each class of financial instruments listed in the table above:

Nuclear  Decommissioning  Trust  Funds  The fair  values  of  available-for-sale
marketable  debt  securities  and  equity   investments   held  by  the  Nuclear
Decommissioning  Trust are based on quoted market  prices at the reporting  date
for those or similar investments.  

Cash and Cash  Equivalents  The  carrying  amount  of cash and cash  equivalents
approximates fair value due to the short maturity of these instruments.

Mandatorily  Redeemable  Preferred  Stock and  Long-Term  Debt The fair value of
mandatorily  redeemable preferred stock and long-term debt is estimated based on
the quoted  market  prices for similar  issues or by  discounting  expected cash
flows at the rates currently offered for debt of the same remaining  maturities,
as advised by IP's bankers.

Notes Payable The carrying amount of notes payable  approximates  fair value due
to the short maturity of these instruments.

Note 14 - Quarterly  Consolidated  Financial  Information  and Common Stock Data
(unaudited)
<TABLE>
<S>                                                <C>                    <C>                 <C>                     <C>   
                                                                                                               (Millions of dollars)
                                                    First Quarter         Second Quarter      Third Quarter           Fourth Quarter
                                                        1997                  1997               1997                     1997
Operating revenues                                  $   472.8             $  415.3             $   497.1               $   388.7
Operating income                                         88.9                 82.6                 101.8                     5.4
Net income (loss) before extraordinary item              55.0                 51.4                  71.9                   (27.5)
Net income (loss) after extraordinary item               55.0                 51.4                  71.9                  (222.5)
Net income (loss) applicable to common stock             49.5                 46.0                  67.5                  (228.5)
Cash dividends declared on common stock                  23.5                 23.2                  22.2                    22.2
Cash dividends paid on common stock                      23.5                 23.5                  23.2                    22.2


                                                   First Quarter          Second Quarter       Third Quarter          Fourth Quarter
                                                       1996                    1996               1996                      1996
Operating revenues                                  $   446.7             $   365.7          $   458.4                 $   417.9
Operating income                                         88.1                  74.9              133.3                      65.1
Net income                                               49.1                  48.7              100.6                      30.2
Net income applicable to common stock                    43.5                  42.5               94.8                      24.8
Cash dividends declared on common stock                  21.2                  21.2               21.2                      23.5
Cash dividends paid on common stock                      21.2                  21.2               21.2                      21.2
</TABLE>

<PAGE>

Illinois Power Company
SELECTED CONSOLIDATED FINANCIAL DATA
<TABLE>

<S>                                            <C>           <C>         <C>           <C>         <C>            <C>
                                                                                                              (Millions of dollars)
                                                     1997          1996        1995         1994         1993          1987
Operating revenues
  Electric                                     $   1,244.4   $   1,202.9  $   1,252.6  $   1,177.5  $   1,135.6   $     910.8
  Electric interchange                               175.6         137.6        116.3        110.0        130.8          92.4
  Gas                                                353.9         348.2        272.5        302.0        314.8         308.7
  Total operating revenues                        $1,773.9      $1,688.7  $   1,641.4  $   1,589.5  $   1,581.2   $   1,311.9
Extraordinary item net of income tax benefit   $    (195.0)  $       -    $       -    $       -    $       -     $       - 
Net income (loss) after extraordinary item     $     (44.2)  $     228.6  $     182.7  $     180.3  $     (56.1)  $     289.6
Effective income tax rate                             40.1%         37.6%        39.1%        38.4%       (72.4)%        19.1%
Net income (loss) applicable to common stock   $     (65.5)  $     205.6  $     155.5  $     161.8  $     (82.2)  $     251.9
Cash dividends declared on common stock        $      91.1   $      87.1  $      77.9  $      49.1  $      30.2   $     178.5
Cash dividends paid on common stock                   92.4          84.8         75.3         60.5         60.5         176.2
Total assets                                   $   5,291.5   $   5,568.5  $   5,567.2  $   5,595.8  $   5,445.1   $   5,922.7
Capitalization
  Common stock equity                          $   1,299.1   $   1,576.1  $   1,478.1  $   1,466.0  $   1,342.8   $   1,841.4
  Preferred stock                                     57.1          96.2        125.6        224.7        303.7         315.2
  Mandatorily redeemable
    preferred stock                                  197.0         197.0         97.0        133.0         48.0         160.0
  Long-term debt                                   1,617.5       1,636.4      1,739.3      1,946.1      1,926.3       2,279.2
  Total capitalization                            $3,170.7      $3,505.7  $   3,440.0  $   3,769.8  $   3,620.8   $   4,595.8
Retained earnings (deficit)                    $      89.5   $     245.9  $     129.6  $      51.1  $     (71.0)  $     554.8
Capital expenditures                           $     223.9   $     187.3  $     209.3  $     193.7  $     277.7   $     263.5
Cash flows from operations                     $     418.7   $     443.3  $     473.7  $     280.2  $     396.6   $     232.3
AFUDC as a percent of earnings
  applicable to common stock                          (7.6)%         3.2%         3.9%         5.7%       N/A            80.2%
Ratio of earnings to fixed charges                     1.24          3.40         2.77         2.73          .80          2.51
</TABLE>

<PAGE>

Illinois Power Company
SELECTED STATISTICS
<TABLE>
<S>                                                     <C>       <C>        <C>         <C>        <C>       <C>

                                                         1997       1996       1995       1994       1993       1987
Electric Sales in KWH (Millions)
Residential                                             4,734      4,782      4,754      4,537      4,546      4,241
Commercial                                              3,943      3,894      3,804      3,517      3,246      2,862
Industrial                                              8,403      8,493      8,670      8,685      8,120      7,323
Other                                                     426        367        367        536        337        910
            Sales to ultimate consumers                17,506     17,536     17,595     17,275     16,249     15,336
Interchange                                             7,230      5,454      4,444      4,837      6,015      3,682
Wheeling                                                3,253        928        642        622        569          -
            Total electric sales                       27,989     23,918     22,681     22,734     22,833     19,018
Electric Revenues (Millions)
Residential                                               489   $    483   $    500   $    471   $    463   $    352
Commercial                                                325        318        321        295        269        209
Industrial                                                376        360        392        378        360        325
Other                                                      40         38         37         30         40         25
            Revenues from ultimate consumers            1,230      1,199      1,250      1,174      1,132        911
Interchange                                               176        138        116        110        131         92
Wheeling                                                   14          4          3          3          3          -
            Total electric revenues                    $1,420   $  1,341   $  1,369   $  1,287   $  1,266   $  1,003
Gas Sales in Therms (Millions)
Residential                                            $  343        427        356        359        371        332
Commercial                                                147        177        144        144        148        137
Industrial                                                 47         99         88         81         78         96
            Sales to ultimate consumers                   537        703        588        584        597        565
Transportation of customer-owned gas                      309        251        273        262        229        327
            Total gas sold and transported                846        954        861        846        826        892
Interdepartmental sales                                    19          9         21          5          7          5
            Total gas delivered                           865        963        882        851        833        897
Gas Revenues (Millions)
Residential                                            $  238   $    216   $    173   $    192   $    200   $    192
Commercial                                                 77         79         60         66         68         66
Industrial                                                 20         40         24         31         34         34
            Revenues from ultimate consumers              335        335        257        289        302        292
Transportation of customer-owned gas                        9          7          8          9          8         15
Miscellaneous                                              10          6          7          4          5          2
            Total gas revenues                       $    354   $    348   $    272   $    302   $    315   $    309
System peak demand (native load) in kw (thousands)      3,532      3,492      3,667      3,395      3,415      3,083
Firm peak demand (native load) in kw (thousands)        3,469      3,381      3,576      3,232      3,254      2,923
Net generating capability in kw (thousands)             3,289      4,148      3,862      4,121      4,045      3,400
Electric customers (end of year)                      580,257    549,957    529,966    553,869    554,270    542,848
Gas customers (end of year)                           405,710    389,223    374,299    388,170    394,379    384,091
Employees (end of year)                                 3,655      3,635      3,559      4,350      4,540      4,616
</TABLE>


500 south 27th street, decatur, illinois 62521 n http://www.illinova.com
unlocking the power 1997
This entire report is printed on recycled paper



                                                                   Exhibit 21(a)


Subsidiaries of Illinova Corporation and Illinois Power Company


                                                           State or Jurisdiction
Name                                                          of Incorporation
- ----                                                       ---------------------

Illinova Corporation                                             Illinois
  Illinois Power Company                                         Illinois
           IP Gas Supply Company                                 Illinois
           Illinois Power Fuel Company (1)                       Illinois
           Illinois Power Capital, L.P. (2)                      Delaware
           Illinois Power Financing I                            Delaware
  Illinova Generating Company                                    Illinois
           Electric Energy, Inc. (3)                             Illinois
           Illinova Resource Recovery, Inc.
                    (formerly IPG Canfield Co.)                  Illinois
           IGC Krishnapatnam Company
                    (formerly IPG Dominguez Co.)                 Illinois
           IPG Eastern, Inc.                                     Illinois
           IPG Ferndale, Inc.                                    Illinois
           IPG Frederickson, Inc.                                Illinois
           IGC Solutions, Inc.
                    (formerly IPG LAP Cogen, Inc.)               Illinois
           IGC Grimes Frontier, Inc.
                    (formerly IPG Panorama Co.)                  Illinois
           IPG Paris, Inc.                                       Illinois
           IPG Western, Inc.                                     Illinois
           IGC Acquisition Co.
                    (formerly IPG Aztec Co.)                     Illinois
           IGC Brazos, Inc.                                      Illinois
           IGC Development Company                               Illinois
           IGC International, Inc.                               Cayman Islands
           IGC Grimes County, Inc.
                    (formerly IGC Sub Co., Inc.)                 Illinois
           White Oak Energy Investors, Inc.                      Illinois
           ECI Energy, Ltd. (4)                                  Delaware
           North American Energy Services Co. (5)                Washington
           IGC ELCO Partnership, LLC (6)                         Cayman Islands
           IGC Jamaica Partnership, LLC (7)                      Cayman Islands
           IGC International II, Inc.                            Cayman Islands
           IGC Flores Partnership, LLC (8)                       Cayman Islands
           IGC Flores Partnership II, LLC (9)                    Cayman Islands
           FIG Leasing International, Inc. (10)                  Cayman Islands
           FIG Leasing International III, Inc. (11)              Cayman Islands
           FIG Equipment, LLC (12)                               Cayman Islands
           IGC Aguaytia Partners, LLC (13)                       Cayman Islands
           IGC Mauritius Holding Company
                    (formerly IGC-ABC Shanghai Co.)(14)          Mauritius
           Illinova ZJ XC Company (15)                           Mauritius
           IGC Mauritius International Company (16)              Mauritius
           IGC Uch, LLC (17)                                     Cayman Islands
           Operaciones de Arequipa, LLC (18)                     Cayman Islands
           Tenaska-Illinova Generating Inter-
                    national, LLC (19)                           Cayman Islands
           Fuerza Electrica de Latinoamerica,LLC (20)            Cayman Islands
           IGC (Encoe), LLC                                      Cayman Islands
           IGC Vietnam Development, Inc.                         Cayman Islands
           IGC STI Guna Company (21)                             Mauritius
           COE (UK) Corp. (22)                                   Connecticut
           COE (Gencoe) Corp. (23)                               Connecticut

<PAGE>

           Charter Oak (Paris), Inc. (24)                        Connecticut
   Illinova Energy Partners, Inc.                                Delaware
           Tenaska Marketing Ventures (25)                       Nebraska
   Illinova Insurance Company                                    Vermont

(1)  Illinois  Power Company owns 50% of the common stock of Illinois Power Fuel
     Company.

(2)  Illinois  Power Company is the general  partner in Illinois  Power Capital,
     L.P.,  with  a  3%  equity  ownership  share.  Illinois  Power  Capital  is
     consolidated in the accounts of Illinois Power Company.

(3)  Illinova Generating Company owns 20% of the common stock of EEI.

(4)  Illinova  Generating  Company owns 47.5% of the voting  common stock of ECI
     Energy, Ltd.

(5)  Illinova  Generating Company owns 50% of the common stock of North American
     Energy Services Company.

(6)  IGC International,  Inc. (a wholly-owned  subsidiary of Illinova Generating
     Company) owns 99% and IGC International II Inc. (a wholly-owned  subsidiary
     of Illinova  Generating  Company)  owns 1% of the common  stock of IGC ELCO
     Partnership, LLC.

(7)  IGC International,  Inc. (a wholly-owned  subsidiary of Illinova Generating
     Company) owns 99% and IGC International II, Inc. (a wholly-owned subsidiary
     of Illinova  Generating Company) owns 1% of the common stock of IGC Jamaica
     Partnership, LLC.

(8)  IGC International,  Inc. (a wholly-owned  subsidiary of Illinova Generating
     Company) owns 99% and IGC International II, Inc. (a wholly-owned subsidiary
     of Illinova  Generating  Company) owns 1% of the common stock of IGC Flores
     Partnership, LLC.

(9)  IGC International,  Inc. (a wholly-owned  subsidiary of Illinova Generating
     Company) owns 99% and IGC International II, Inc. (a wholly-owned subsidiary
     of Illinova  Generating  Company) owns 1% of the common stock of IGC Flores
     Partnership II, LLC.

(10) IGC Flores  Partnership,  LLC (a subsidiary of IGC International,  Inc. and
     IGC  International  II,  Inc.) owns 51% of the common  stock of FIG Leasing
     International, LLC.

(11) IGC Flores  Partnership,  LLC (a subsidiary of IGC International,  Inc. and
     IGC  International  II,  Inc.) owns 51% of the common  stock of FIG Leasing
     International III, Inc.

(12) IGC Flores  Partnership,  LLC (a subsidiary of IGC International,  Inc. and
     IGC  International II, Inc.) owns 50% of the common stock of FIG Equipment,
     LLC.

(13) IGC International,  Inc. (a wholly-owned  subsidiary of Illinova Generating
     Company) owns 99% and IGC International II, Inc. (a wholly-owned subsidiary
     of Illinova Generating Company) owns 1% of the common stock of IGC Aguaytia
     Partners, LLC.

(14) IGC  International   II,  Inc.  (a  wholly-owned   subsidiary  of  Illinova
     Generating  Company)  owns  100% of the  equity  of IGC  Mauritius  Holding
     Company Ltd.
<PAGE>

(15) IGC  International   II,  Inc.  (a  wholly-owned   subsidiary  of  Illinova
     Generating Company) owns 100% of the equity of Illinova ZJ XC Company.

(16) IGC  International   II,  Inc.  (a  wholly-owned   subsidiary  of  Illinova
     Generating Company) owns 100% of the equity of IGC Mauritius  International
     Company.

(17) IGC  International   II,  Inc.  (a  wholly-owned   subsidiary  of  Illinova
     Generating  Company) owns 99% and IGC  International,  Inc. (a wholly-owned
     subsidiary of Illinova  Generating  Company) owns 1% of the common stock of
     IGC Uch, LLC.

(18) IGC International,  Inc. (a wholly-owned  subsidiary of Illinova Generating
     Company) owns 99% and IGC International II, Inc. (a wholly-owned subsidiary
     of Illinova  Generating Company) owns 1% of the common stock of Operaciones
     de Arequipa, LLC.

(19) IGC Uch, LLC (a subsidiary of IGC International, Inc. and IGC International
     II, Inc.)owns 50% of the voting common stock of Tenaska-Illinova Generating
     International, LLC.

(20) IGC International,  Inc. (a wholly-owned  subsidiary of Illinova Generating
     Company) owns 99% and IGC International II, Inc. (a wholly-owned subsidiary
     of  Illinova  Generating  Company)  owns 1% of the  common  stock of Fuerza
     Electrica de Latinoamerica, LLC.

(21) IGC  International   II,  Inc.  (a  wholly-owned   subsidiary  of  Illinova
     Generating Company) owns 100% the equity IGC STI Guna Company.

(22) IGC (Encoe), LLC (a wholly-owned subsidiary of Illinova Generating Company)
     owns 79.9% and COE  (Gencoe)  Corp.  (owned 49% by IGC  (Encoe),  LLC) owns
     20.1% of the common stock of COE (UK) Corp.

(23) IGC (Encoe), LLC (a wholly-owned subsidiary of Illinova Generating Company)
     owns 49% of the common stock of COE (Gencoe) Corp.

(24) IPG Paris, Inc. (a wholly-owned  subsidiary of Illinova Generating Company)
     owns 100% of the common stock of Charter Oak (Paris), Inc.

(25) Illinova Energy Partners,  Inc. owns 50% of the equity of Tenaska Marketing
     Ventures.



                                                                      Exhibit 23




                       Consent of Independent Accountants


We  hereby  consent  to the  incorporation  by  reference  in  the  Registration
Statement on Form S-8 (No.  33-22068),  the  Registration  Statement on Form S-8
(No.  33-60278),  the  Registration  Statement on Form S-8 (No.  33-66124),  the
Prospectus  constituting  part of the  Registration  Statement  on Form S-3 (No.
33-25699),  the Prospectus  constituting  part of the Registration  Statement on
Form  S-3  (No.  333-03011),   and  the  Prospectus  constituting  part  of  the
Registration  Statement on Form S-3 (No. 333-17847) of our report dated February
12, 1998,  appearing on page A-10 of the Annual  Report to  Shareholders  in the
Appendix to the Illinova  Corporation  Proxy  Statement which is incorporated in
this Annual Report on Form 10-K.




/s/ Price Waterhouse LLP
Price Waterhouse LLP

March 10, 1998


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<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                           
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                          197
                                    57
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                      0
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<INCOME-BEFORE-INTEREST-EXPEN>                 275
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                    22
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