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      Combined 8-K Filed 12/15/05 by Ameren and Certain Subsidiaries
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      STATES</font></div>
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      AND EXCHANGE COMMISSION</font></div>
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      D.C. 20549</font></div>
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                8-K</font></div>
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      REPORT</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pursuant
      to Section 13 or 15(d) of the</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Securities
      Exchange Act of 1934</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Date
      of
      report (Date of earliest event reported):</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><a name="ReportDate"/></div>
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">December
                9 , 2005</font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Commission
                  File Number</u></font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Exact
                  Name of Registrant as Specified in Charter;</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">State
                  of Incorporation;</font></div>
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                  and Telephone Number</u></font></div>
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                  Number</u></font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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                  Corporation</font></a></div>
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                  621-3222</font></div>
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                  Corporation)</font></div>
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                  Louis, Missouri 63103</font></div>
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                  621-3222</font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                  Illinois Public Service Company</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Illinois
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                  523-3600</font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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              <td align="left" valign="top" width="26%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                  Corporation)</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">1901
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">St.
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                  621-3222</font></div>
              </td>
              <td align="left" valign="top" width="27%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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              </td>
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                <div>&#160;</div>
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              <td align="left" valign="top" width="26%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                  Inc.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Illinois
                  Corporation)</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">300
                  Liberty Street</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Peoria,
                  Illinois 61602</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font size="2">(309)
                  677-5271</font></div>
              </td>
              <td align="left" valign="top" width="27%">
                <div>&#160;</div>
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">37-1169387</font>&#160;</div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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              <td align="left" valign="top" width="26%">
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                  Illinois Light Company</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Illinois
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              <td align="left" valign="top" width="26%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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              <td align="left" valign="top" width="26%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                  Power Company</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Illinois
                  Corporation)</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">370
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      Written communications pursuant to Rule 425 under the Securities Act (17 CFR
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      Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
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      Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
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      Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
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      approved, effective January 1, 2006, annual base salaries of the chief executive
      officer and four most highly compensated executive officers (&#8220;Named Executive
      Officers&#8221;) of Ameren and its subsidiaries, including Union Electric Company,
      doing business as AmerenUE (&#8220;UE&#8221;), Central Illinois Public Service Company,
      doing business as AmerenCIPS (&#8220;CIPS&#8221;), Ameren Energy Generating Company
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      Officers is attached as Exhibit 10.1 and is incorporated herein by reference.
      Included as a part of this exhibit is a schedule reporting the range of 2006
      bonus targets for executive officers under Ameren&#8217;s 2006 executive compensation
      program expressed as a percentage of base salary. Ameren&#8217;s Human Resources
      Committee and Board on December 9, 2005 approved an increase in the 2006 bonus
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                  2005 and 2006 Base Salary Table for Named Executive Officers
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      Company, CILCORP Inc., Central Illinois Light Company and Illinois Power Company
      (each a &#8220;registrant&#8221;). Information contained herein relating to any individual
      registrant has been filed by such registrant on its own behalf. No registrant
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      duly caused this report to be signed on its behalf by the undersigned thereunto
      duly authorized. The signature for each undersigned company shall be deemed
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                AMEREN&#160;CORPORATION</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">
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UNION
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              <div><font size="2">(Principal Accounting
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    <div>&#160;</div>
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                2005 and 2006 Base Salary Table for Named Executive Officers
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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Combined 8-K Filed 12/15/05 by Ameren and Certain Subsidiaries
UNITED
      STATES
SECURITIES
      AND EXCHANGE COMMISSION
Washington,
      D.C. 20549
FORM
                8-K
CURRENT
      REPORT
Pursuant
      to Section 13 or 15(d) of the
Securities
      Exchange Act of 1934
Date
      of
      report (Date of earliest event reported):
December
                9 , 2005
Commission
                  File Number
Exact
                  Name of Registrant as Specified in Charter;
State
                  of Incorporation;
Address
                  and Telephone Number
IRS
                  Employer
Identification
                  Number
1-14756
Ameren
                  Corporation
(Missouri
                  Corporation)
1901
                  Chouteau Avenue
St.
                  Louis, Missouri 63103
(314)
                  621-3222
43-1723446
1-2967
Union
                  Electric Company
(Missouri
                  Corporation)
1901
                  Chouteau Avenue
St.
                  Louis, Missouri 63103
(314)
                  621-3222
43-0559760
1-3672
Central
                  Illinois Public Service Company
(Illinois
                  Corporation)
607
                  East Adams Street
Springfield,
                  Illinois 62739
(217)
                  523-3600
37-0211380
333-56594
Ameren
                  Energy Generating Company
(Illinois
                  Corporation)
1901
                  Chouteau Avenue
St.
                  Louis, Missouri 63103
(314)
                  621-3222
37-1395586
2-95569
CILCORP
                  Inc.
(Illinois
                  Corporation)
300
                  Liberty Street
Peoria,
                  Illinois 61602
(309)
                  677-5271
37-1169387
1-2732
Central
                  Illinois Light Company
(Illinois
                  Corporation)
300
                  Liberty Street
Peoria,
                  Illinois 61602
(309)
                  677-5271
37-0211050
1-3004
Illinois
                  Power Company
(Illinois
                  Corporation)
370
                  South Main Street
Decatur,
                  Illinois 62523
(217)
                  424-6600
37-0344645
Check
      the
      appropriate box below if the Form 8-K filing is intended to simultaneously
      satisfy the filing obligation of the registrant under any of the following
      provisions:
[
      ]
      Written communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425)
[
      ]
      Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12)
[
      ]
      Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
      Act
      (17 CFR 240.14d-2(b))
[
      ]
      Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
      Act
      (17 CFR 240.13e-4(c))
SECTION
      1
      - REGISTRANT'S BUSINESS AND OPERATIONS
ITEM
      1.01
      Entry into a Material Definitive Agreement.
On
      December 9, 2005, the Human Resources Committee of the Board of Directors of
      Ameren Corporation ("Ameren") recommended, and the full Board of Directors
      approved, effective January 1, 2006, annual base salaries of the chief executive
      officer and four most highly compensated executive officers ("Named Executive
      Officers") of Ameren and its subsidiaries, including Union Electric Company,
      doing business as AmerenUE ("UE"), Central Illinois Public Service Company,
      doing business as AmerenCIPS ("CIPS"), Ameren Energy Generating Company
      ("Genco"), CILCORP Inc. ("CILCORP"), Central Illinois Light Company, doing
      business as AmerenCILCO ("CILCO") and Illinois Power Company, doing business as
      AmerenIP ("IP"), collectively referred to as the "Registrants." A table setting
      forth the annual base salaries for 2005 and 2006 for these Named Executive
      Officers is attached as Exhibit 10.1 and is incorporated herein by reference.
      Included as a part of this exhibit is a schedule reporting the range of 2006
      bonus targets for executive officers under Ameren's 2006 executive compensation
      program expressed as a percentage of base salary. Ameren's Human Resources
      Committee and Board on December 9, 2005 approved an increase in the 2006 bonus
      target for the chief executive officer from the 2005 target of 85 percent to
      90
      percent of base salary. The 2006 bonus targets for the other executive officers
      remain the same as their 2005 bonus targets.
Also
      on
      December 9, 2005, the Human Resources Committee of the Ameren Board of Directors
      recommended and the full Board of Directors approved, effective January 1,
      2006,
      a perquisite which entitles the Named Executive Officers, as well as certain
      other executive officers of the Registrants, reimbursement of up to $10,000
      annually for the cost of tax and financial planning services provided by
      specified service providers.
SECTION
        9
        - FINANCIAL STATEMENTS AND EXHIBITS
ITEM
        9.01
        Financial Statements and Exhibits.
(d)
        Exhibits
Exhibit
        Number:
Title:
10.1
2005 and 2006 Base Salary Table for Named Executive Officers
and 2006 Executive Officer Bonus Targets
-
          2
          -
This
      combined
      Form 8-K is being filed separately by Ameren Corporation, Union Electric
      Company, Central Illinois Public Service Company, Ameren Energy Generating
      Company, CILCORP Inc., Central Illinois Light Company and Illinois Power Company
      (each a "registrant"). Information contained herein relating to any individual
      registrant has been filed by such registrant on its own behalf. No registrant
      makes any representation as to information relating to any other
      registrant.
SIGNATURES
Pursuant
      to
      the requirements of the Securities Exchange Act of 1934, each registrant has
      duly caused this report to be signed on its behalf by the undersigned thereunto
      duly authorized. The signature for each undersigned company shall be deemed
      to
      relate only to matters having reference to such company or its
      subsidiaries.
AMEREN CORPORATION
(Registrant)
/s/ Martin
              J.
              Lyons
Martin
              J. Lyons
Vice
                President and Controller
(Principal Accounting
                Officer)
UNION
                  ELECTRIC COMPANY
(Registrant)
/s/ Martin
                J.
                Lyons
Martin
                J. Lyons
Vice
                  President and Controller
(Principal Accounting
                  Officer)
CENTRAL ILLINOIS PUBLIC SERVICE COMPANY
(Registrant)
/s/ Martin
              J.
              Lyons
Martin
              J. Lyons
Vice
                President and Controller
(Principal Accounting
                Officer)
AMEREN ENERGY GENERATING COMPANY
(Registrant)
/s/ Martin
                J.
                Lyons
Martin
                J. Lyons
Vice
                  President and Controller
(Principal Accounting
                  Officer)
CILCORP Inc.
(Registrant)
/s/ Martin
                  J.
                  Lyons
Martin
                  J. Lyons
Vice
                    President and Controller
(Principal Accounting
                    Officer)
-
              3
              -
CENTRAL ILLINOIS LIGHT COMPANY
(Registrant)
/s/ Martin
                    J.
                    Lyons
Martin
                    J. Lyons
Vice
                      President and Controller
(Principal Accounting
                      Officer)
ILLINOIS POWER COMPANY
(Registrant)
/s/ Martin
                      J.
                      Lyons
Martin
                      J. Lyons
Vice
                        President and Controller
(Principal Accounting
                        Officer)
Date:
      December 15, 2005
-
          4
          -
Exhibit
      Index
Exhibit
      Number:
Title:
10.1
2005 and 2006 Base Salary Table for Named Executive Officers
and 2006 Executive Officer Bonus Targets
-
          5
          -