UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549


                                    FORM 11-K





                   (X) ANNUAL REPORT PURSUANT TO SECTION 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                   FOR THE FISCAL YEAR ENDED DECEMBER 31, 2003

                                       OR

                 ( ) TRANSITION REPORT PURSUANT TO SECTION 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                        For the transition period from to
                              ---------------- ----

                          COMMISSION FILE NUMBER 1-2732




          A.   Full title of the plan and the address of the plan,  if different
               from that of the issuer named below:



                             EMPLOYEES' SAVINGS PLAN
                                       OF
                         CENTRAL ILLINOIS LIGHT COMPANY


          B.   Name of issuer of  securities  held  pursuant to the plan and the
               address of its principal  executive  office: On January 31, 2003,
               Ameren  Corporation   completed  its  acquisition  from  The  AES
               Corporation  (1001  North 19th  Street,  20th  Floor,  Arlington,
               Virginia 22209) of CILCORP Inc. and its  subsidiaries,  including
               Central Illinois Light Company. Upon the acquisition,  securities
               of The AES Corporation  ceased being available for purchase under
               the Employees' Savings Plan of Central Illinois Light Company. On
               March 14, 2003, Ameren Corporation filed  Registration  Statement
               No.  333-103818  on Form  S-8 with the  Securities  and  Exchange
               Commission  registering  1,000,000  shares of Ameren  Corporation
               common stock for issuance  under the  Employees'  Savings Plan of
               Central   Illinois   Light   Company.   The   address  of  Ameren
               Corporation's  principal executive office and of the plan is 1901
               Chouteau Avenue, St. Louis, Missouri 63103.











Employees' Savings Plan of
Central Illinois Light
Company
Financial Statements and Additional Information
December 31, 2003 and 2002














Employees' Savings Plan of
Central Illinois Light Company
Index
December 31, 2003 and 2002
- -------------------------------------------------------------------------------------------------------------------

                                                                                                        

                                                                                                            Page(s)

Report of Independent Registered Public Accounting Firm...........................................................1

Financial Statements

Statements of Net Assets Available for Benefits...................................................................2

Statements of Changes in Net Assets Available for Benefits........................................................3

Notes to Financial Statements...................................................................................4-9

Additional Information*

Schedule I:    Schedule of Assets (Held at End of Year)..........................................................10




*Other schedules  required by 29 CFR  2520.103-10  of the  Department of Labor's
 Rules  and  Regulations  for  Reporting  and  Disclosure   under  the  Employee
 Retirement Income Security Act of 1974 ("ERISA"), as amended, have been omitted
 because they are not applicable.







             Report of Independent Registered Public Accounting Firm



To the Participants and Administrator of
the Employees' Savings Plan of Central
Illinois Light Company



In our opinion, the accompanying statements of net assets available for benefits
and the  related  statements  of changes in net assets  available  for  benefits
present fairly, in all material respects,  the net assets available for benefits
of the Employees' Savings Plan of Central Illinois Light Company (the "Plan") at
December 31, 2003 and 2002, and the changes in net assets available for benefits
for the years then ended in  conformity  with  accounting  principles  generally
accepted in the United States of America.  These  financial  statements  are the
responsibility  of the Plan'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 the  standards  of the  Public
Company Accounting  Oversight Board (United States),  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 our opinion.

Our audits  were  conducted  for the  purpose of forming an opinion on the basic
financial statements taken as a whole. The supplemental schedule of assets (held
at end of year) is presented for the purpose of additional analysis and is not a
required part of the basic financial statements but is supplementary information
required by the  Department of Labor's Rules and  Regulations  for Reporting and
Disclosure  under the Employee  Retirement  Income  Security  Act of 1974.  This
supplemental  schedule  is the  responsibility  of the  Plan's  management.  The
supplemental  schedule has been subjected to the auditing  procedures applied in
the audits of the basic  financial  statements  and, in our  opinion,  is fairly
stated in all material  respects in relation to the basic  financial  statements
taken as a whole.

As described in Note 1 to the financial statements,  on January 1, 2004 the Plan
merged with and into the Ameren Corporation Savings Investment Plan.




St. Louis, Missouri
June 18, 2004


                                       1








Employees' Savings Plan of
Central Illinois Light Company
Statements of Net Assets Available for Benefits
December 31, 2003 and 2002
- -------------------------------------------------------------------------------------------------------------------


                                                                                        2003               2002
                                                                                            
Assets
Investments (Note 3)                                                                $109,479,244        $90,978,189

Cash                                                                                       1,071            802,007

Receivables
    Participant contributions                                                            123,380                  -
    Employer contributions                                                                34,873                  -
    Dividends and interest                                                               162,375                306
                                                                                -----------------  -----------------

             Total receivables                                                           320,628                306
                                                                                -----------------  -----------------

             Total assets                                                            109,800,943         91,780,502

Liabilities
Accrued expenses                                                                           1,551                  -
                                                                                -----------------  -----------------

             Net assets available for benefits                                      $109,799,392        $91,780,502
                                                                                =================  =================







   The accompanying notes are an integral part of these financial statements.


                                       2






Employees' Savings Plan of
Central Illinois Light Company
Statements of Changes in Net Assets Available for Benefits
Years Ended December 31, 2003 and 2002
- -------------------------------------------------------------------------------------------------------------------


                                                                                       2003               2002
                                                                                           
Investment income (loss)
Interest and dividends                                                              $ 2,917,233        $ 2,805,494
Net appreciation (depreciation) in fair value of investments                         18,321,639        (17,277,282)
                                                                               -----------------  -----------------

                                                                                     21,238,872        (14,471,788)
                                                                               -----------------  -----------------

Contributions
Participant contributions                                                             4,619,493          3,945,477
Employer contributions                                                                1,282,653          1,169,368
                                                                               -----------------  -----------------

                                                                                      5,902,146          5,114,845
                                                                               -----------------  -----------------

Benefits and expenses
Benefits paid to participants                                                         9,114,652          4,394,007
Administrative expenses                                                                   7,476              5,823
                                                                               -----------------  -----------------

                                                                                      9,122,128          4,399,830
                                                                               -----------------  -----------------

             Net increase (decrease)                                                 18,018,890        (13,756,773)

Net assets available for benefits
Beginning of year                                                                    91,780,502        105,537,275
                                                                               -----------------  -----------------

End of year                                                                        $109,799,392        $91,780,502
                                                                               =================  =================









   The accompanying notes are an integral part of these financial statements.

                                       3



Employees' Savings Plan of
Central Illinois Light Company
Notes to Financial Statements
December 31, 2003 and 2002
- --------------------------------------------------------------------------------

1.   Description of Plan

     General
     The  following  is a  brief  summary  of  the  various  provisions  of  the
     Employees'  Savings Plan of Central  Illinois  Light  Company (the "Plan").
     Participants   should  refer  to  the  Plan   document  for  more  complete
     information.

     On  January  31,  2003,  Ameren   Corporation   ("Ameren")   completed  its
     acquisition  of  all  of the  outstanding  common  stock  of  CILCORP  Inc.
     ("CILCORP") from The AES Corporation ("AES"). With the acquisition, Central
     Illinois Light Company (the  "Company")  became an indirectly  wholly owned
     subsidiary of Ameren, but remains a separate utility company,  operating as
     AmerenCILCO.  Effective  with the sale of CILCORP  to Ameren,  participants
     were no longer able to purchase  additional  shares of AES common stock. In
     addition,  any  payroll  withholding  allocation  for AES common  stock was
     allocated to the Merrill Lynch  Retirement  Preservation  Trust.  Effective
     April 1, 2003, the Plan was amended by adding the Ameren Common Stock Fund.

     Effective  May 2003,  the  Company's  Board of Directors  appointed  Ameren
     Services Company as Plan Administrator,  and consequently,  Ameren Services
     Company had the authority and responsibility for the general administration
     of the Plan. In addition,  in May 2003,  the  Company's  Board of Directors
     appointed  Ameren  as  Plan  sponsor,  and  consequently,  Ameren  had  the
     authority to amend or terminate  the Plan subject to certain  restrictions.
     Merrill Lynch & Co., Inc. ("Merrill Lynch"), as Trustee,  had the authority
     and responsibility to hold and protect the assets of the Plan in accordance
     with Plan provisions.

     Effective January 1, 2004, the Plan was merged into the Ameren  Corporation
     Savings Investment Plan ("Successor Plan"). The assets transferred into the
     Successor  Plan  consisted  of 29,767 and 931,778  shares of Ameren and AES
     common  stock,  respectively,  as of the date of the  transfer  with a fair
     market value of $1,369,268 and $8,795,987, respectively. In addition, other
     investments,  cash and receivables of $99,635,688,  and accrued expenses of
     $1,551 were transferred into the Successor Plan. All significant provisions
     of the Plan were carried  over to the  Successor  Plan without  substantial
     modification.

     The Plan was a defined  contribution  plan  whose  purpose  was to  provide
     certain  participating  employees (the  "Participants") of the Company with
     the ability to defer a portion of their annual  compensation for retirement
     purposes with the benefit of the Company matching  contributions.  The Plan
     was  subject  to  certain  provisions  of  ERISA  and  regulations  of  the
     Securities and Exchange Commission.

     Certain   reclassifications  have  been  made  to  prior  year's  financial
     statements to conform to 2003 reporting.

     Participation
     The Plan covered any eligible employee of the Company who elected to enroll
     in the Plan.  Eligible  employees  included  those  represented  by a union
     agreement who had completed at least one year of service (the completion of
     1,000 hours of service during a 12-month  consecutive  period  beginning on
     the employee's first day of employment).  Eligible  employees also included
     those not  represented by a union  agreement who had completed at least one
     year of service on or before December 31, 2000.  Participation  by eligible
     employees was voluntary.

                                       4




Employees' Savings Plan of
Central Illinois Light Company
Notes to Financial Statements
December 31, 2003 and 2002
- --------------------------------------------------------------------------------

     Effective January 2003, the Plan was amended such that certain  management,
     office and  technical  employees  of the  Company who had  previously  been
     participants  in the  AES  Wealth  Accumulation  Plan  became  eligible  to
     participate in the Plan. Further,  during May 2003, the National Conference
     of  Fireman  and Oilers - Local 8  ("NCF&O")  collective  bargaining  group
     agreed to allow certain of their  covered  employees of the Company who had
     previously been participants in the AES Wealth  Accumulation Plan to become
     eligible to  participate  in the Plan,  retroactive  to February  2003.  In
     addition,  the amendment and  subsequent  agreement  reached with the NCF&O
     union provided that all future  employees  would be eligible to participate
     in the Plan.

     Contributions
     Effective  April 1, 2002,  the Plan was amended such that each  Participant
     could  elect to have his or her  compensation  reduced  by an amount of not
     less than one percent and not more than 100 percent of his or her base rate
     of pay up to a maximum dollar amount, which was $12,000 in 2003 and $11,000
     in 2002 ("Pre-Tax  Contribution").  The Company  contributed to the Plan an
     amount equal to 50 percent of each Participant's Pre-Tax Contribution up to
     a maximum of six  percent  of such  Participant's  compensation  ("Employer
     Matching  Contribution").  Participants  could also  elect to make  regular
     after-tax contributions ("Voluntary Contribution") to the Plan in an amount
     which, when combined with the Pre-Tax Contributions,  was not more than 100
     percent of their  regular  base pay.  Participants  who  received,  or were
     entitled  to receive,  a  distribution  from a plan of a previous  employer
     could  transfer the  distribution  to an account under the Plan  ("Rollover
     Contribution").

     Participants  directed  their  contributions  and  the  Company's  matching
     contributions  by electing  that such  contributions  be placed in a single
     investment  fund or allocated in increments of 1 percent to any combination
     of investment funds held by the Plan. A Participant could change his or her
     investment  designation  at any time  prior to the next  available  payroll
     period,  effective  as of the close of the  business  day prior to the next
     available  payroll  period.   Any  contributions   already  invested  in  a
     particular  separate  investment  fund  could  be  transferred  to  another
     separate  investment  fund or funds as of the  close of any  business  day.
     Pending  investment  of the assets into any  investment  fund,  the Trustee
     could temporarily make certain short-term investments.

     Participant Loans
     The Plan permitted  Participants  to borrow from their accounts  within the
     Plan.  Such  borrowings  could be made  subject to the  following:  (1) the
     minimum amount of the loan was $1,000,  (2) the maximum loan amount was the
     lesser of one-half of the  Participant's  account balance or $50,000,  with
     adjustments for certain previously  outstanding loans, (3) the loan bore an
     interest  rate  equal to the prime  rate as  published  by the Wall  Street
     Journal on the last  business  day of the month that the loan was made plus
     one percent, (4) Participants pledged the balance of their Plan accounts as
     security for the loans and (5) such other rules and  regulations as adopted
     by the  Plan.  At  December  31,  2003  and  2002,  the  interest  rates on
     Participant loans ranged from 5 percent to 11 percent.

     Vesting
     The amounts in Participants'  accounts,  including  Company  contributions,
     were fully vested at all times.

                                       5




Employees' Savings Plan of
Central Illinois Light Company
Notes to Financial Statements
December 31, 2003 and 2002
- --------------------------------------------------------------------------------

     Payment of Benefits
     Upon termination of service,  a Participant could elect to receive either a
     lump-sum amount equal to the value of the Participant's  vested interest in
     his or her  account,  or he or she could elect to defer  distribution  to a
     date up to the Participant's normal retirement date.

     Plan Termination
     The Plan was  terminated  upon the merger into the Successor  Plan.  Ameren
     intends to continue the Successor Plan indefinitely. However, Ameren may at
     any time and for any reason,  subject to ERISA and Internal Revenue Service
     regulations,  suspend or terminate  the  Successor  Plan provided that such
     action  does  not   retroactively   adversely  affect  the  rights  of  any
     Participant under the Successor Plan.

2.   Summary of Significant Accounting Policies

     Basis of Accounting
     The  accompanying  financial  statements  of the Plan are  prepared  on the
     accrual basis of accounting,  except that benefit  payments to Participants
     are recorded upon distribution.

     Use of Estimates
     The  preparation  of financial  statements  in conformity  with  accounting
     principles  generally  accepted  in the United  States of America  requires
     management  to make  estimates  and  assumptions  that affect the  reported
     amounts of assets and liabilities and disclosures of contingent  assets and
     liabilities  at the  date of the  financial  statements  and  the  reported
     amounts  of  changes  in net  assets  available  for  benefits  during  the
     reporting period. Actual results could differ from those estimates.

     Investments
     Substantially  all  investments  are presented at fair value as of December
     31, 2003 and 2002,  except for the Merrill  Lynch  Retirement  Preservation
     Trust, which is an investment contract fund stated at contract value, which
     approximates  fair value. The fair value of the Ameren and AES common stock
     was determined  using  year-end  published  market  prices.  Investments in
     equity  securities are valued at net asset market value  including  accrued
     income on the last business day of each year.  Participant loans are valued
     at cost, which  approximates  fair market value. In December 2003, the Plan
     discontinued  the use of the  Self-direct  Account as an investment  option
     under the Plan.

     Investment  securities are exposed to various risks, such as interest rate,
     market,  and  credit.  Due to the  level of risk  associated  with  certain
     investment  securities and the level of  uncertainty  related to changes in
     the value of investment securities, it is at least reasonably possible that
     changes  in risks in the near term  could  materially  affect  the  amounts
     reported in the Statement of Net Assets Available for Benefits.

     Income
     Interest  income was  recorded on the accrual  basis.  Dividend  income was
     recorded on the ex-dividend date.

     Gains and losses on security  transactions were recorded on the trade date.
     Net unrealized  appreciation or depreciation  for the year was reflected in
     net  appreciation  (depreciation)  in  fair  value  of  investments  on the
     Statement of Changes in Net Assets Available for Benefits.

                                       6



Employees' Savings Plan of
Central Illinois Light Company
Notes to Financial Statements
December 31, 2003 and 2002
- --------------------------------------------------------------------------------

     Administrative Expenses
     The Company paid for all of the administrative expenses associated with the
     Plan,  including  the fees and expenses of the Trustee,  except as provided
     for in the Plan. All transaction  fees of an investment fund were paid from
     the assets of that investment fund.





3.   Investments

     The following  table presents  investments of the Plan at December 31, 2003 and 2002, respectively:


                                                                                     2003               2002
                                                                                          
     Investments at Fair Value as Determined by
      Quoted Market Price
     Common Stock
         Ameren Corporation                                                      $  1,369,268       $          -
         The AES Corporation (1)                                                    8,795,987          3,087,471

     Common/Collective Trust
         Merrill Lynch Equity Index Trust I (1)                                    24,573,929         19,388,721

     Mutual Funds
         Ariel Appreciation Fund (1)                                               10,798,583          8,602,177
         PIMCO Total Return Fund Class A (1)                                        6,892,014          6,415,702
         Templeton Foreign Fund                                                     5,443,786          4,166,017
         Merrill Lynch Global Allocation Fund Class A                               5,305,555          3,924,821
         AIM Small Cap Growth Fund Class A                                          1,486,244            840,047
         Alliance Growth and Income                                                 1,207,793            612,301
         One Group Small Cap Value Class A                                          1,141,958            390,693
         Merrill Lynch Fundamental Growth Fund Class A                              1,097,013            397,057
         Dreyfus Founders Discovery Fund                                              620,789            411,391

     Self-direct Account                                                                   62            834,044

     Investments at Estimated Fair Value
     Common/Collective Trusts
         Merrill Lynch Retirement Preservation Trust (1)                           38,084,049         39,139,920

     Loan Fund                                                                      2,662,214          2,767,827
                                                                             -----------------  -----------------

                  Total investments                                              $109,479,244       $ 90,978,189
                                                                             =================  =================




(1)Investments that represent 5 percent or more of the Plan's net assets.


                                       7




Employees' Savings Plan of
Central Illinois Light Company
Notes to Financial Statements
December 31, 2003 and 2002
- --------------------------------------------------------------------------------


     During 2003 and 2002, the Plan's investments (including investments bought,
     sold,  and held  during  the year)  appreciated  (depreciated)  in value as
     follows:






                                                                                   2003               2002
                                                                                       
     Investments at Fair Value as Determined by
      Quoted Market Price
     Common Stock                                                               $ 6,440,576        $(8,509,218)
     Mutual Funds                                                                 6,348,633         (3,029,510)
     Common/Collective Trusts                                                     5,532,430         (5,738,554)
                                                                           -----------------  -----------------

     Net change in fair value                                                   $18,321,639      $ (17,277,282)
                                                                           =================  =================



4.   Transaction with Parties-in-Interest

     At December  31,  2003,  the Plan held Ameren  common stock with a cost and
     market value of $1,281,922 and $1,369,268,  respectively.  During 2003, the
     Plan purchased  shares at a cost of $1,424,680 and sold shares at a cost of
     $142,758.

     At December 31, 2003, the Plan held AES common stock with a cost and market
     value of $9,528,960  and  $8,795,987,  respectively.  During 2003, the Plan
     purchased  shares  at a cost  of  $105,800  and  sold  shares  at a cost of
     $311,914.

     At December 31, 2002, the Plan held AES common stock with a cost and market
     value of $9,735,074  and  $3,087,471,  respectively.  During 2002, the Plan
     purchased  shares  at a cost of  $2,854,788  and sold  shares  at a cost of
     $2,697,214

     At December 31, 2003, the Plan held  investments  in various  accounts that
     are related to Merrill Lynch. At December 31, 2003, these investments had a
     cost and market value of  $68,282,542  and  $69,060,546,  respectively.  At
     December  31,  2002,  these  investments  had a cost  and  market  value of
     $68,604,693 and $62,850,519, respectively.

     These  transactions  were allowable  party-in-interest  transactions  under
     Section 408(b)(8) of the ERISA regulations.



                                       8




Employees' Savings Plan of
Central Illinois Light Company
Notes to Financial Statements
December 31, 2003 and 2002
- --------------------------------------------------------------------------------

5.   Reconciliation of Financial Statements to Form 5500

     The following is a reconciliation  of net assets available for benefits per
     the  financial  statements  to the Form 5500 at December 31, 2003 and 2002.
     See Note 1 for  additional  information  relating to the merger of the Plan
     with the Successor Plan.




                                                                                   2003               2002
                                                                                       
     Net assets available for benefits per the
      financial statements                                                   $  109,799,392     $   91,780,502
     Amounts allocated to withdrawing Participants                                        -           (802,007)
     Plan transfer out                                                         (109,799,392)                 -
                                                                           -----------------  -----------------
     Net assets available for benefits per the
      Form 5500                                                              $            -     $   90,978,495
                                                                           =================  =================




     The following is a reconciliation  of benefits paid to Participants per the
     financial statements to the Form 5500 for the years ended December 31, 2003
     and 2002:






                                                                                   2003               2002

                                                                                        
     Benefits paid to Participants per the
      financial statements                                                      $ 9,114,652        $ 4,394,007
     Add:  Amounts allocated to withdrawing Participants
      during the current year                                                             -            802,007
     Less:  Amounts allocated to withdrawing Participants
      during the prior year                                                        (802,007)                 -
                                                                           -----------------  -----------------

     Benefits paid to Participants per the Form 5500                            $ 8,312,645        $ 5,196,014
                                                                           =================  =================




     Amounts allocated to withdrawing Participants are recorded on the Form 5500
     for benefit  claims that have been processed and approved for payment prior
     to December 31, but not yet paid as of that date.

6.   Federal Income Tax Status

     The Company  obtained a  favorable  determination  letter June 3, 2003,  in
     which the Internal  Revenue  Service stated that the Plan was in compliance
     with the applicable requirements of the Internal Revenue Code (the "Code").
     The  Plan  had been  amended  since  receiving  the  determination  letter.
     However,  prior to the merger with the Successor Plan, the Company believed
     that the Plan was designed and operated in compliance  with the  applicable
     requirements  of the Code, and therefore,  the Plan qualified under Section
     401(a) and the related trust  continued to be tax-exempt as of December 31,
     2003.  Therefore,  no provision for income taxes was included in the Plan's
     financial statements.

                                       9






Employees' Savings Plan of
Central Illinois Light Company
Schedule of Assets (Held at End of Year)
December 31, 2003                                                                                                         Schedule 1
- ------------------------------------------------------------------------------------------------------------------------------------


                                                                                  (c)
                         (b)                                          Description of investment                           (e)
             Identity of issue, borrower,                     including maturity date, rate of interest,                Current
 (a)           lessor, or similar party                           collateral, par, or maturity value                     Value

                                                                                                            
  *    Merrill Lynch                                          Merrill Lynch Retirement Preservation Trust          $   38,084,049
  *    Merrill Lynch                                          Merrill Lynch Equity Index Trust I                       24,573,929
       Ariel Capital Management                               Ariel Appreciation Fund                                  10,798,583
  *    The AES Corporation                                    AES Common Stock                                          8,795,987
       Pacific Investment Management Company                  PIMCO Total Return Fund Class A                           6,892,014
       Franklin Templeton Investments                         Templeton Foreign Fund                                    5,443,786
  *    Merrill Lynch                                          Merrill Lynch Global Allocation Fund Class A              5,305,555
 * **  Participants                                           Loan Fund                                                 2,662,214
       AIM Investments                                        AIM Small Cap Growth Fund Class A                         1,486,244
  *    Ameren Corporation                                     Ameren Common Stock                                       1,369,268
       Alliance Capital Management                            Alliance Growth and Income                                1,207,793
       Banc One Investments                                   One Group Small Cap Value Class A                         1,141,958
  *    Merrill Lynch                                          Merrill Lynch Fundamental Growth Fund Class A             1,097,013
       Founders Asset Management                              Dreyfus Founders Discovery Fund                             620,789
       Merrill Lynch                                          Self-direct Account                                              62
                                                                                                                    ----------------

                                                                                                                     $109,479,244
                                                                                                                    ================




*    Investment represents allowable transaction with a party-in-interest.
**   Interest rates ranging from 5 percent to 11 percent, maturing through 2017.


Note:  Information pertaining to column (d) was omitted because it was not
       applicable.








                                       10





                                   SIGNATURES

          The Plan.  Pursuant to the requirements of the Securities Exchange Act

of 1934,  the trustees (or other  persons who  administer  the employee  benefit

plan)  have duly  caused  this  annual  report to be signed on its behalf by the

undersigned hereunto duly authorized.




                                           EMPLOYEES' SAVINGS PLAN OF
                                           CENTRAL ILLINOIS LIGHT COMPANY


                                           AMEREN SERVICES COMPANY
                                               (Administrator)




                                           By      /s/ Donna K. Martin
                                             -----------------------------------
                                                       Donna K. Martin
                                                        Vice President


June 28, 2004




                                  EXHIBIT INDEX


Exhibit No.                       Description
- -----------     ---------------------------------------------

     23.1       Consent of Independent Auditors - PricewaterhouseCoopers LLP