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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">UNITED
      STATES</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">SECURITIES
      AND EXCHANGE COMMISSION</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Washington,
      D.C.&#160;&#160;20549</font></div>
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              </font>
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">FORM
                8-K</font></div>
            </td>
          </tr>
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            <td valign="top" width="24%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">&#160;</font></td>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">CURRENT
      REPORT</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; 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; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Securities
      Exchange Act of 1934</font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; 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):<a name="ReportDate"/></font></div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

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            <td valign="top" width="24%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">September
                19, 2007</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><a name="Registrant"><br></a></div>
    <div align="center">
      <table cellpadding="0" cellspacing="0" width="80%">

          <tr>
            <td align="justify" valign="top" width="26%" style="PADDING-BOTTOM: 2px">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;"><u>Commission
                File Number</u></font></div>
            </td>
            <td align="left" valign="top" width="26%" style="PADDING-BOTTOM: 2px">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">Exact
                Name of Registrant as </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">Specified
                in Charter;</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">State
                of Incorporation;</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;"><u>Address
                and Telephone Number</u></font></div>
              <div>&#160;</div>
            </td>
            <td align="justify" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">IRS
                Employer</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;"><u>Identification
                Number</u></font></div>
            </td>
          </tr>
          <tr>
            <td align="justify" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;"><a name="jurisdiction">1-14756</a></font></div>
            </td>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;"><a name="cfn">Ameren
                Corporation</a></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">(Missouri
                Corporation)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">1901
                Chouteau Avenue</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">St.
                Louis, Missouri 63103</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">(314)
                621-3222</font></div>
              <div>&#160;</div>
            </td>
            <td align="justify" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;"><a name="ein">43-1723446</a></font></div>
            </td>
          </tr>
          <tr>
            <td align="justify" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">1-3672</font></div>
            </td>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">Central
                Illinois Public Service </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">Company</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">&#160;(Illinois
                Corporation)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">607
                East Adams Street</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">Springfield,
                Illinois 62739</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">(888)
                789-2477</font></div>
              <div>&#160;</div>
            </td>
            <td align="justify" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">37-0211380</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">333-56594</font></div>
            </td>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">Ameren
                Energy Generating </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">Company</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; 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; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">1901
                Chouteau Avenue</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">St.
                Louis, Missouri 63103</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">(314)
                621-3222</font></div>
              <div>&#160;</div>
            </td>
            <td align="justify" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">37-1395586</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">2-95569</font></div>
            </td>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">CILCORP
                Inc.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; 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; 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; 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; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">(309)
                677-5271</font></div>
              <div>&#160;</div>
            </td>
            <td align="justify" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">37-1169387</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">1-2732</font></div>
            </td>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">Central
                Illinois Light Company</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; 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; 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; 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; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">(309)
                677-5271</font></div>
              <div>&#160;</div>
            </td>
            <td align="justify" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">37-0211050</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">1-3004</font></div>
            </td>
            <td align="left" valign="top" width="26%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">Illinois
                Power Company</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; 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; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">370
                South Main Street</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">Decatur,
                Illinois 62523</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">(217)
                424-6600</font></div>
              <div>&#160;</div>
            </td>
            <td align="justify" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">37-0344645</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;"><a name="Zip">Check
      the appropriate box below if the Form 8-K filing is intended to
      simultaneously satisfy the filing obligation of the registrants under any of
      the
      following provisions:</a></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;"><font id="TAB1" style="MARGIN-LEFT: 13.5pt;"></font>[&#160;&#160;]
      Written communications
      pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;"><font id="TAB1" style="MARGIN-LEFT: 13.5pt;"></font>[&#160;&#160;]
      Soliciting material
      pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;"><font id="TAB1" style="MARGIN-LEFT: 13.5pt;"></font>[&#160;&#160;]
      Pre-commencement
      communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
      240.14d-2(b))</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;"><font id="TAB1" style="MARGIN-LEFT: 13.5pt;"></font>[&#160;&#160;]
      Pre-commencement
      communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
      240.13e-4(c))</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;"><strong>ITEM
      8.01&#160;&#160;Other Events.</strong></font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Reference
      is made to Note 2 &#8211; Rate and Regulatory Matters to our financial statements
      under Part I, Item&#160;1; Outlook and Liquidity and Capital Resources under
      Part I, Item 2, Management&#8217;s Discussion and Analysis of Financial Condition and
      Results of Operations; and Part II, Item 1A. Risk Factors, in the Form 10-Q
      for
      the quarterly period ended June 30, 2007, of registrant Ameren Corporation
      (&#8220;Ameren&#8221;) and its registrant subsidiaries, Central Illinois Public Service
      Company, doing business as AmerenCIPS (&#8220;CIPS&#8221;), Ameren Energy Generating Company
      (&#8220;Genco&#8221;), CILCORP Inc. (&#8220;CILCORP&#8221;), Central Illinois Light Company, doing
      business as AmerenCILCO (&#8220;CILCO&#8221;), and Illinois Power Company, doing business as
      AmerenIP (&#8220;IP&#8221;) (collectively, the &#8220;registrants&#8221;), for a discussion of a
      settlement agreement reached in July 2007 among key stakeholders in Illinois
      that addresses the increase in electric rates and the future power procurement
      process in Illinois. The settlement was subject to enactment of legislation
      into
      law, which occurred on August 28, 2007, and was designed to avoid electric
      rate
      rollback and freeze legislation applicable to CIPS, CILCO and IP, and a
      generation tax on Genco, AmerenEnergy Resources Generating Company (&#8220;AERG&#8221;), a
      subsidiary of CILCO, and Electric Energy Inc. (&#8220;EEI&#8221;).&#160;&#160;CIPS, CILCO
      and IP are collectively referred to herein as the &#8220;Ameren Illinois
      utilities.&#8221;&#160;&#160;</font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">As
      part
      of the settlement agreement, the Ameren Illinois utilities entered into
      financial contracts with their affiliate Ameren Energy Marketing Company
      (&#8220;Marketing Company&#8221;) (for the benefit of Genco and AERG) to lock-in energy
      prices for 400 to 1,000 megawatts (&#8220;MW&#8221;) annually of their around-the-clock
      power requirements during the period June 1, 2008 to December 31, 2012, at
      relevant market prices. These financial contracts do not include capacity,
      are
      not load-following products and do not involve the physical delivery of energy.
      These financial contracts became effective on August 28, 2007, when legislation
      in connection with the settlement agreement became law. Below are the contracted
      volumes and prices per megawatthour:</font></div>
    <div><br></div>
    <div align="center">
      <table cellpadding="0" cellspacing="0" width="75%">

          <tr>
            <td align="left" valign="top" width="28%" style="BORDER-TOP: black 1.5pt solid; BORDER-BOTTOM: black 2px solid">
              <div>&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;"><strong>Period</strong></font></div>
            </td>
            <td valign="top" width="10%" style="BORDER-TOP: black 1.5pt solid; BORDER-BOTTOM: black 2px solid">
              <div>&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;"><strong>Volume</strong></font></div>
            </td>
            <td valign="top" width="13%" style="BORDER-TOP: black 1.5pt solid; BORDER-BOTTOM: black 2px solid">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;"><strong>Price
                per</strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;"><strong>Megawatthour</strong></font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="28%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">June
                1, 2008 &#8211; December 31, 2008</font></div>
            </td>
            <td valign="top" width="10%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">400
                MW</font></div>
            </td>
            <td valign="top" width="13%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">$
                47.45</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="28%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">January
                1, 2009 &#8211; May 31, 2009</font></div>
            </td>
            <td valign="top" width="10%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">400
                MW</font></div>
            </td>
            <td valign="top" width="13%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">$
                49.47</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="28%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">June
                1, 2009 &#8211; December 31, 2009</font></div>
            </td>
            <td valign="top" width="10%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">800
                MW</font></div>
            </td>
            <td valign="top" width="13%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">$
                49.47</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="28%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">January
                1, 2010 &#8211; May 31, 2010</font></div>
            </td>
            <td valign="top" width="10%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">800
                MW</font></div>
            </td>
            <td valign="top" width="13%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">$
                51.09</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="28%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">June
                1, 2010 &#8211; December 31, 2010</font></div>
            </td>
            <td valign="top" width="10%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">1,000
                MW</font></div>
            </td>
            <td valign="top" width="13%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">$
                51.09</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="28%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">January
                1, 2011 &#8211; December 31, 2011</font></div>
            </td>
            <td valign="top" width="10%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">1,000
                MW</font></div>
            </td>
            <td valign="top" width="13%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">$
                52.06</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="28%" style="BORDER-BOTTOM: black 4px double">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">January
                1, 2012 &#8211; December 31, 2012</font></div>
            </td>
            <td valign="top" width="10%" style="BORDER-BOTTOM: black 4px double">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">1,000
                MW</font></div>
            </td>
            <td valign="top" width="13%" style="BORDER-BOTTOM: black 4px double">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman;">$
                53.08</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">The
      financial contracts provide that if any one of the following events occurs
      during their term, the Ameren Illinois utilities and Marketing Company will
      meet
      as soon as practicable, but no later than 30 days after the date such event
      occurs, to identify and discuss its effect on the terms and conditions of,
      and
      prices under the financial contracts: a) a state tax on electric generation;
      b)
      a state or federal tax on and/or regulation of greenhouse gas emissions (e.g.,
      a
      carbon tax); or c) if the state of Illinois enacts a law that eliminates retail
      electric supplier choice for the residential and small commercial customers
      of
      the Ameren Illinois utilities.&#160;&#160;The financial contracts also provide
      that if any one of these events occurs, the parties to the financial contracts
      will negotiate to determine in a commercially reasonable manner whether the
      affected terms, conditions and prices can be revised so as to preserve the
      economic benefits of the financial contracts for all parties and to revise
      the
      financial contracts accordingly.&#160;&#160;In the event the parties to the
      financial contracts are not able to agree on such revisions, Marketing Company
      may terminate the financial contracts </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div id="GLFTR" style="WIDTH: 100%" align="left">
        </div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman;">-2-</font></div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right">
        </div>
      </div>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">by
      written notice no earlier than 60 days and no later than 90 days after such
      event occurs, with the termination being effective when notice is
      given.</font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">-
      - - - -
      - - - - - - - - - - - - - - -</font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">This
      combined Form 8-K is being filed separately by Ameren, CIPS, Genco, CILCORP,
      CILCO and IP.&#160;&#160;Information contained herein relating to any individual
      registrant has been filed by such registrant on its own behalf.&#160;&#160;No
      registrant makes any representation as to information relating to any other
      registrant.</font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;"><u>FORWARD-LOOKING
      STATEMENTS</u></font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Statements
      in this report not based on historical facts are considered &#8220;forward-looking&#8221;
and, accordingly, involve risks and uncertainties that could cause actual
      results to differ materially from those discussed.&#160;&#160;Although such
      forward-looking statements have been made in good faith and are based on
      reasonable assumptions, there is no assurance that the expected results will
      be
      achieved.&#160;&#160;These statements include (without limitation) statements as
      to future expectations, beliefs, plans, strategies, objectives, events,
      conditions, and financial performance.&#160;&#160;In connection with the &#8220;safe
      harbor&#8221; provisions of the Private Securities Litigation Reform Act of 1995, we
      are providing this cautionary statement to identify important factors that
      could
      cause actual results to differ materially from those anticipated.&#160;&#160;The
      following factors, in addition to those discussed elsewhere in this report
      and
      in our other filings with the Securities and Exchange Commission, could cause
      actual results to differ materially from management expectations suggested
      in
      such forward-looking statements:</font></div>
    <div><br></div>
    <div>
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top">
            <td align="right" style="WIDTH: 36pt">
              <div><font style="DISPLAY: inline; FONT-SIZE: 10pt;" face="Symbol, serif">&#183;&#160;&#160;</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">regulatory
                or legislative actions, including changes in regulatory policies
                and
                ratemaking determinations, the enactment of legislation rolling back
                and
                freezing Illinois electric rates at 2006 levels, or similar actions
                that
                impair the full and timely recovery of costs in Illinois for the
                Ameren
                Illinois utilities, or the enactment of legislation taxing electric
                generators in Illinois, such as Genco, AERG or
                EEI;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div>
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top">
            <td align="right" style="WIDTH: 36pt">
              <div><font style="DISPLAY: inline; FONT-SIZE: 10pt;" face="Symbol, serif">&#183;&#160;&#160;</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">changes
                in laws and other governmental
                actions;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div>
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top">
            <td align="right" style="WIDTH: 36pt">
              <div><font style="DISPLAY: inline; FONT-SIZE: 10pt;" face="Symbol, serif">&#183;&#160;&#160;</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">the
                inability of our counterparties and affiliates to meet their obligations
                with respect to contracts and financial instruments;
                and</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div>
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top">
            <td align="right" style="WIDTH: 36pt">
              <div><font style="DISPLAY: inline; FONT-SIZE: 10pt;" face="Symbol, serif">&#183;&#160;&#160;</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">legal
                and administrative proceedings.</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Given
      these uncertainties, undue reliance should not be placed on these
      forward-looking statements.&#160;&#160;Except to the extent required by the
      federal securities laws, we undertake no obligation to update or revise publicly
      any forward-looking statements to reflect new information or future
      events.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div id="GLFTR" style="WIDTH: 100%" align="left">
        </div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman;">-3-</font></div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right">
        </div>
      </div>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 342pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">SIGNATURES</font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">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.&#160;&#160;The signature for each undersigned company shall be
      deemed to relate only to matters having reference to such company or its
      subsidiaries.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">AMEREN
      CORPORATION</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">(Registrant)</font></div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 342pt; MARGIN-RIGHT: 0pt">&#160;</div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 342pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;"><u>/s/
      Martin J.
      Lyons&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</u></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Martin
      J.
      Lyons</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Vice
      President and Controller</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">(Principal
      Accounting Officer)</font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">CENTRAL
      ILLINOIS PUBLIC SERVICE COMPANY</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">(Registrant)</font></div>
    <div>&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;"><u>/s/
      Martin J.
      Lyons&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</u></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Martin
      J.
      Lyons</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Vice
      President and Controller</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">(Principal
      Accounting Officer)</font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">AMEREN
      ENERGY GENERATING COMPANY</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">(Registrant)</font></div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 342pt; MARGIN-RIGHT: 0pt">&#160;</div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 342pt; MARGIN-RIGHT: 0pt"><u><font size="2">/s/
      Martin J.
      Lyons&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</font></u></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Martin
      J.
      Lyons</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Vice
      President and Controller</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">(Principal
      Accounting Officer)</font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">CILCORP
      INC.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">(Registrant)</font></div>
    <div><font id="TAB1" style="MARGIN-LEFT: 121.5pt;"></font>&#160;</div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 342pt; MARGIN-RIGHT: 0pt"><u><font size="2">/s/
      Martin J.
      Lyons&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</font></u></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Martin
      J.
      Lyons</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Vice
      President and Controller</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">(Principal
      Accounting Officer)</font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">CENTRAL
      ILLINOIS LIGHT COMPANY</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">(Registrant)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><u><font size="2">/s/
      Martin J.
      Lyons&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</font></u></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Martin
      J.
      Lyons</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Vice
      President and Controller</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">(Principal
      Accounting Officer)</font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">ILLINOIS
      POWER COMPANY</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">(Registrant)</font></div>
    <div><br></div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 342pt; MARGIN-RIGHT: 0pt"><u><font size="2">/s/
      Martin J.
      Lyons&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</font></u></div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 342pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Martin
      J.
      Lyons</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Vice
      President and Controller</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 135pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">(Principal
      Accounting Officer)</font></div>
    <div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;">Date:&#160;&#160;September
      19, 2007</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Times New Roman;">-4-</font></div>
  </body>
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ameren8k09192007.htm
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):
September
                19, 2007
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
1-3672
Central
                Illinois Public Service
Company
(Illinois
                Corporation)
607
                East Adams Street
Springfield,
                Illinois 62739
(888)
                789-2477
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 registrants 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))
ITEM
      8.01  Other Events.
Reference
      is made to Note 2 – Rate and Regulatory Matters to our financial statements
      under Part I, Item 1; Outlook and Liquidity and Capital Resources under
      Part I, Item 2, Management's Discussion and Analysis of Financial Condition and
      Results of Operations; and Part II, Item 1A. Risk Factors, in the Form 10-Q
      for
      the quarterly period ended June 30, 2007, of registrant Ameren Corporation
      ("Ameren") and its registrant subsidiaries, 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, the "registrants"), for a discussion of a
      settlement agreement reached in July 2007 among key stakeholders in Illinois
      that addresses the increase in electric rates and the future power procurement
      process in Illinois. The settlement was subject to enactment of legislation
      into
      law, which occurred on August 28, 2007, and was designed to avoid electric
      rate
      rollback and freeze legislation applicable to CIPS, CILCO and IP, and a
      generation tax on Genco, AmerenEnergy Resources Generating Company ("AERG"), a
      subsidiary of CILCO, and Electric Energy Inc. ("EEI").  CIPS, CILCO
      and IP are collectively referred to herein as the "Ameren Illinois
      utilities."
As
      part
      of the settlement agreement, the Ameren Illinois utilities entered into
      financial contracts with their affiliate Ameren Energy Marketing Company
      ("Marketing Company") (for the benefit of Genco and AERG) to lock-in energy
      prices for 400 to 1,000 megawatts ("MW") annually of their around-the-clock
      power requirements during the period June 1, 2008 to December 31, 2012, at
      relevant market prices. These financial contracts do not include capacity,
      are
      not load-following products and do not involve the physical delivery of energy.
      These financial contracts became effective on August 28, 2007, when legislation
      in connection with the settlement agreement became law. Below are the contracted
      volumes and prices per megawatthour:
Period
Volume
Price
                per
Megawatthour
June
                1, 2008 – December 31, 2008
400
                MW
$
                47.45
January
                1, 2009 – May 31, 2009
400
                MW
$
                49.47
June
                1, 2009 – December 31, 2009
800
                MW
$
                49.47
January
                1, 2010 – May 31, 2010
800
                MW
$
                51.09
June
                1, 2010 – December 31, 2010
1,000
                MW
$
                51.09
January
                1, 2011 – December 31, 2011
1,000
                MW
$
                52.06
January
                1, 2012 – December 31, 2012
1,000
                MW
$
                53.08
The
      financial contracts provide that if any one of the following events occurs
      during their term, the Ameren Illinois utilities and Marketing Company will
      meet
      as soon as practicable, but no later than 30 days after the date such event
      occurs, to identify and discuss its effect on the terms and conditions of,
      and
      prices under the financial contracts: a) a state tax on electric generation;
      b)
      a state or federal tax on and/or regulation of greenhouse gas emissions (e.g.,
      a
      carbon tax); or c) if the state of Illinois enacts a law that eliminates retail
      electric supplier choice for the residential and small commercial customers
      of
      the Ameren Illinois utilities.  The financial contracts also provide
      that if any one of these events occurs, the parties to the financial contracts
      will negotiate to determine in a commercially reasonable manner whether the
      affected terms, conditions and prices can be revised so as to preserve the
      economic benefits of the financial contracts for all parties and to revise
      the
      financial contracts accordingly.  In the event the parties to the
      financial contracts are not able to agree on such revisions, Marketing Company
      may terminate the financial contracts
-2-
by
      written notice no earlier than 60 days and no later than 90 days after such
      event occurs, with the termination being effective when notice is
      given.
-
      - - - -
      - - - - - - - - - - - - - - -
This
      combined Form 8-K is being filed separately by Ameren, CIPS, Genco, CILCORP,
      CILCO and IP.  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.
FORWARD-LOOKING
      STATEMENTS
Statements
      in this report not based on historical facts are considered "forward-looking"
and, accordingly, involve risks and uncertainties that could cause actual
      results to differ materially from those discussed.  Although such
      forward-looking statements have been made in good faith and are based on
      reasonable assumptions, there is no assurance that the expected results will
      be
      achieved.  These statements include (without limitation) statements as
      to future expectations, beliefs, plans, strategies, objectives, events,
      conditions, and financial performance.  In connection with the "safe
      harbor" provisions of the Private Securities Litigation Reform Act of 1995, we
      are providing this cautionary statement to identify important factors that
      could
      cause actual results to differ materially from those anticipated.  The
      following factors, in addition to those discussed elsewhere in this report
      and
      in our other filings with the Securities and Exchange Commission, could cause
      actual results to differ materially from management expectations suggested
      in
      such forward-looking statements:
·
regulatory
                or legislative actions, including changes in regulatory policies
                and
                ratemaking determinations, the enactment of legislation rolling back
                and
                freezing Illinois electric rates at 2006 levels, or similar actions
                that
                impair the full and timely recovery of costs in Illinois for the
                Ameren
                Illinois utilities, or the enactment of legislation taxing electric
                generators in Illinois, such as Genco, AERG or
                EEI;
·
changes
                in laws and other governmental
                actions;
·
the
                inability of our counterparties and affiliates to meet their obligations
                with respect to contracts and financial instruments;
                and
·
legal
                and administrative proceedings.
Given
      these uncertainties, undue reliance should not be placed on these
      forward-looking statements.  Except to the extent required by the
      federal securities laws, we undertake no obligation to update or revise publicly
      any forward-looking statements to reflect new information or future
      events.
-3-
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)
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)
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:  September
      19, 2007
-4-