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      Ameren Combined 8-K, dated March 15, 2007
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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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    <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">CURRENT
      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><a name="ReportDate"/></div>
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                9, 2007</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
            </td>
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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 </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">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>
              <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"><u>Address
                and Telephone Number</u></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="justify" valign="top" width="27%" style="border-bottom: medium none;">
              <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">IRS
                Employer</font></div>
              <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>Identification
                Number</u></font></div>
            </td>
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            <td align="justify" valign="top" width="30%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><a name="Jurisdiction"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">1-14756</font></a></div>
            </td>
            <td align="left" valign="top" width="30%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><a name="CFN"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren
                Corporation</font></a></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">(Missouri
                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
                Chouteau Avenue</font></div>
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                Louis, Missouri 63103</font></div>
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                621-3222</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="justify" valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><a name="EIN"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">43-1723446</font></a></div>
            </td>
          </tr>
          <tr>
            <td align="justify" valign="top" width="30%">
              <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">1-2967</font></div>
            </td>
            <td align="left" valign="top" width="30%">
              <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">Union
                Electric 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">(Missouri
                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
                Chouteau Avenue</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">St.
                Louis, Missouri 63103</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">(314)
                621-3222</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="justify" valign="top" width="27%">
              <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">43-0559760
                </font></div>
            </td>
          </tr>
          <tr>
            <td align="justify" valign="top" width="30%">
              <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">1-3672</font></div>
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                Illinois Public Service </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">(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">607
                East Adams 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">Springfield,
                Illinois 62739</font></div>
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                523-3600</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="justify" valign="top" width="27%">
              <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">37-0211380
                </font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="30%">
              <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">2-95569</font></div>
            </td>
            <td align="left" valign="top" width="30%">
              <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">CILCORP
                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>
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                677-5271</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="justify" valign="top" width="27%">
              <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">37-1169387</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="30%">
              <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">1-2732</font></div>
            </td>
            <td align="left" valign="top" width="30%">
              <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">Central
                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
                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 style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(309)
                677-5271</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="justify" valign="top" width="27%">
              <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">37-0211050</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="30%">
              <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">1-3004</font></div>
            </td>
            <td align="left" valign="top" width="30%">
              <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
                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
                South Main 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">Decatur,
                Illinois 62523</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">(217)
                424-6600</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="justify" valign="top" width="27%">
              <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">37-0344645</font></div>
            </td>
          </tr>

      </table>
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    <div>&#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"><a name="Address"/><a name="Zip"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">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:</font></a></div>
    <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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      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; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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      Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12)</font></div>
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      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; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 9pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">[&#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; 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="left"><br></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"><strong>ITEM
      8.01 Other Events.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></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">Reference
      is made to Note 3 - Rate and Regulatory Matters and Note 13 - Related Party
      Transactions to our financial statements under Part II, Item 8; Outlook and
      Liquidity and Capital Resources under Part II, Item 7. Management&#8217;s Discussion
      and Analysis of Financial Condition and Results of Operations; and Part I,
      Item
      1A. Risk Factors in the Form 10-K for the year ended December 31, 2006, of
      registrant Ameren Corporation (&#8220;Ameren&#8221;) and its registrant subsidiaries, Union
      Electric Company, doing business as AmerenUE (&#8220;UE&#8221;), Central Illinois Public
      Service Company, doing business as AmerenCIPS (&#8220;CIPS&#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 the process for power
      procurement for Ameren&#8217;s Illinois utility companies following the expiration of
      the Illinois electric rate freeze on January 1, 2007, and power supply contracts
      on December 31, 2006, a discussion of credit rating changes issued in response
      to potential actions in Illinois that could threaten the financial solvency
      of
      CIPS, CILCO and IP and their ability to procure power, and a discussion of
      the
      delivery service rate cases filed by Ameren&#8217;s Illinois utility companies with
      the Illinois Commerce Commission (&#8220;ICC&#8221;) in December 2005 and by UE with the
      Missouri Public Service Commission in July 2006.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></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">On
      March
      12, 2007, Moody&#8217;s Investors Service, Inc. (&#8220;Moody&#8217;s&#8221;) downgraded the credit
      ratings of Ameren, UE, CIPS, CILCORP, CILCO, and IP as set forth in the
      following table:</font></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="center">
      <table cellpadding="0" cellspacing="0" width="85%">

          <tr bgcolor="#ffffff">
            <td align="left" valign="top" width="21%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td valign="top" width="21%" style="border-bottom: medium none;">
              <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"><strong><u>From</u></strong></font></div>
            </td>
            <td valign="top" width="21%" style="border-bottom: medium none;">
              <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"><strong>&#160;<u>&#160;To</u>&#160;&#160;</strong></font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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"><strong>Ameren:</strong></font></div>
            </td>
            <td align="left" valign="top" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="left" valign="top" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Issuer
                Credit Rating</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa1</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa2</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Senior
                Unsecured</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa1</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa2</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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"><strong>UE:</strong></font></div>
            </td>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Issuer
                Credit Rating</font></div>
            </td>
            <td valign="top" width="21%">
              <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">A3</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa1</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Senior
                Secured</font></div>
            </td>
            <td valign="top" width="21%">
              <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">A2</font></div>
            </td>
            <td valign="top" width="21%">
              <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">A3</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Preferred
                Stock</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa2</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa3</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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"><strong>CIPS:</strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
            </td>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Issuer
                Credit Rating</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa3</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Ba1</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Senior
                Secured</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa2</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa3</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Preferred
                Stock</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Ba2</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Ba3</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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"><strong>CILCORP:</strong></font></div>
            </td>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Senior
                Unsecured</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Ba1</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Ba2</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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"><strong>CILCO:</strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
            </td>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Issuer
                Credit Rating</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa2</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Ba1</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Senior
                Secured</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa1</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa2</font></div>
            </td>
          </tr>

      </table>
    </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>
    <div id="PGBRK" style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <div id="FTR">
        <div id="GLFTR" style="WIDTH: 100%" align="left">
        </div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; 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; 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="center">
      <table cellpadding="0" cellspacing="0" width="85%">

          <tr>
            <td align="left" valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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"><strong>IP:</strong></font></div>
            </td>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Issuer
                Credit Rating</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa3</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Ba1</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Senior
                Secured</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa2</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Baa3</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%">
              <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">Preferred
                Stock</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Ba2</font></div>
            </td>
            <td valign="top" width="21%">
              <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">Ba3</font></div>
            </td>
          </tr>
          <tr bgcolor="#ffffff">
            <td align="left" valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
            <td valign="top" width="21%">&#160;</td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">

          <tr valign="top" style="line-height: 1.25;">
            <td style="width: 45pt;">&#160;</td>
            <td style="width: 36pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">*</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">A
                credit rating is not a recommendation to buy, sell or hold securities.
                It
                should be </font></div>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">evaluated
                independently of any other rating. Ratings are subject to revision
                or
                </font></div>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">withdrawal
                at any time by the rating
                organization.</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></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">In
      addition, Moody&#8217;s assigned to CILCORP a corporate family credit rating of &#8220;Ba1&#8221;
and a probability of default rating of &#8220;Ba1&#8221;. Moody&#8217;s indicated that the ratings
      of Ameren, CIPS, CILCORP, CILCO and IP remain on review for possible further
      downgrade. Moody&#8217;s also placed Ameren&#8217;s &#8220;Prime-2&#8221; short-term credit rating for
      commercial paper on review for possible downgrade. The ratings of UE are no
      longer on review although the rating outlook is negative.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></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">Moody&#8217;s
      indicated that the downgrade of the ratings of Ameren, CIPS, CILCORP, CILCO
      and
      IP was prompted by the passage of rate freeze legislation by both the Illinois
      House of Representatives on March 6, 2007, and the Environment and Energy
      Committee of the Illinois Senate on March 7, 2007, and the growing support
      for a
      rate freeze in both chambers of the Illinois General Assembly. Moody&#8217;s indicated
      that the ratings of Ameren, CIPS, CILCORP, CILCO and IP are under review for
      possible future downgrade. In the event of the passage and enactment of rate
      freeze legislation, Moody&#8217;s indicated that the Ameren Illinois utilities could
      be downgraded further into speculative (junk) grade.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></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">Moody&#8217;s
      indicated that the downgrade of UE was prompted by higher costs, lower financial
      metrics and a continued challenging regulatory environment in Missouri. The
      downgrade also reflects Moody&#8217;s expectation that Ameren may have to rely more
      heavily on UE for upstreamed dividends if rate freeze legislation is passed
      and
      enacted in Illinois.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></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">As
      a
      result of the downgrade by Moody&#8217;s of CIPS&#8217;, CILCO&#8217;s and IP&#8217;s credit ratings
      below investment grade (junk) status, these companies delivered a letter to
      the
      ICC on March 14, 2007. The letter indicated that the Ameren Illinois utilities
      would be unable to offer the $20 million one-time customer bill credit intended
      to assist high-use residential customers that was initially proposed on March
      7,
      2007. The letter also indicated that the Ameren Illinois utilities would be
      unable to offer the customer elect phase-in plan, including the recent amendment
      which would have provided for 0% interest on a deferred portion of customers&#8217;
bills. The Ameren Illinois utilities also notified the ICC that the voluntary
      $15 million contribution that the utilities intended to make to fund energy
      assistance and energy efficiency initiatives would&#160;not be made as well. The
      Ameren Illinois utilities took such steps because of the need to marshal their
      resources to fund ongoing utility operations.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></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">On
      March
      9, 2007, Standard &amp; Poor&#8217;s Ratings Services, a division of The McGraw-Hill
      Companies (&#8220;S&amp;P&#8221;), issued a report in response to the passage by the
      Environment and Energy Committee of the Illinois Senate of legislation which
      would roll back rates to 2006 levels and freeze rates for at least six months.
      S&amp;P indicated in its report that if such bill was passed by the full Senate,
      the issuer credit ratings on the Ameren Illinois utilities would be immediately
      lowered to &#8220;BB+&#8221;. According to S&amp;P, such a downgrade would reflect growing
      sentiment in both chambers of the Illinois General Assembly of the need for
      rate
      relief for certain affected customers of the Ameren Illinois utilities. S&amp;P
      indicated that it would further lower the ratings on the Ameren Illinois
      utilities if rate freeze legislation &#8220;of any meaningful length&#8221; is approved by
      both chambers of the Illinois General Assembly, and such ratings may be lowered
      precipitously in such circumstance.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></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">As
      a
      result of the downgrade by Moody&#8217;s of the issuer credit ratings of CIPS, CILCO
      and IP below investment-grade status, CIPS, CILCO and IP expect that they may
      be
      faced with reduced access to capital. The downgrade may also increase the cost
      of borrowing and fuel, power and gas supply, among other things, resulting
      in a
      negative impact on earnings. CIPS, CILCO, and IP may also be required to post
      collateral or other assurances for </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div id="PGBRK" style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <div id="FTR">
        <div id="GLFTR" style="WIDTH: 100%" align="left">
        </div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; 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: 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"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">certain
      trade obligations. In addition, the cost of borrowing under our credit
      facilities can increase or decrease depending upon the credit ratings of the
      borrower. Suppliers may also request prepayment for products and
      services.</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">-
      - - - -
      - - - - - - - - - - - - - - - </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <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">This
      combined Form 8-K is being filed separately by Ameren, UE, CIPS, 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.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></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"><u>FORWARD-LOOKING
      STATEMENTS</u></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></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">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. 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 &#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. 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 style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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, such as in UE&#8217;s pending electric and gas rate
                cases and the outcome of CIPS, CILCO and IP rate rehearing proceedings,
                or
                the enactment of legislation freezing electric rates at 2006 levels
                or
                similar actions that impair the full and timely recovery of costs
                in
                Illinois;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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
                impact of the termination of the joint dispatch agreement, among
                UE, CIPS
                and Ameren Energy Generating
                Company;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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, including monetary and fiscal
                policies; </font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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
                effects of increased competition in the future due to, among other
                things,
                deregulation of certain aspects of our business at both the state
                and
                federal levels, and the implementation of deregulation, such as occurred
                when the electric rate freeze and power supply contracts expired
                in
                Illinois at the end of 2006;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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
                effects of participation in the Midwest Independent Transmission
                System
                Operator, Inc.;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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
                availability of fuel such as coal, natural gas, and enriched uranium
                used
                to produce electricity; the availability of purchased power and natural
                gas for distribution; and the level and volatility of future market
                prices
                for such commodities, including the ability to recover the costs
                for such
                commodities;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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
                effectiveness of our risk management strategies and the use of financial
                and derivative instruments;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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">prices
                for power in the Midwest;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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">business
                and economic conditions, including their impact on interest
                rates;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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">disruptions
                of the capital markets or other events that make access to necessary
                capital more difficult or costly;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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
                impact of the adoption of new accounting standards and the application
                of
                appropriate technical accounting rules and
                guidance;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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">actions
                of credit rating agencies and the effects of such
                actions;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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">weather
                conditions and other natural
                phenomena;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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
                impact of system outages caused by severe weather conditions or other
                events;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.25;">
            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></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">generation
                plant construction, installation and performance, including costs
                associated with UE&#8217;s Taum Sauk pumped-storage hydroelectric plant incident
                and the plant&#8217;s future operation;</font></div>
            </td>
          </tr>

      </table>
    </div>
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                hydroelectric plant incident;</font></div>
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                divestitures;</font></div>
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                impact of current environmental regulations on utilities and power
                generating companies and the expectation that more stringent requirements,
                including those related to greenhouse gases, will be introduced over
                time,
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                effect;</font></div>
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            <td align="right" style="width: 36pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Symbol, serif">&#183;&#160;&#160;</font></td>
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                inability of our counterparties and affiliates to meet their obligations
                with respect to contracts and financial
                instruments;</font></div>
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                cost and availability of transmission capacity for the energy generated
                by
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                by the Ameren companies;</font></div>
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                and administrative proceedings; and</font></div>
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          </tr>

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          <tr valign="top" style="line-height: 1.25;">
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                of sabotage, war, terrorism or intentionally disruptive
                acts.</font></div>
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          </tr>

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      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.</font></div>
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    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">SIGNATURES</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: 36pt; LINE-HEIGHT: 1.25; 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. The signature for each undersigned company shall be deemed
      to
      relate only to matters having reference to such company or its
      subsidiaries.</font></div>
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    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 333pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>/s/
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      Birdsong&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</u></font></div>
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      Birdsong&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
&#160;</font></u></div>
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      E.
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    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Vice
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      Birdsong&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
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    <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Vice
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    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 333pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>/s/
      Jerre E.
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    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 333pt; MARGIN-RIGHT: 0pt"><u><font size="2">/s/
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</font></u></div>
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Ameren Combined 8-K, dated March 15, 2007
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):
March
                9, 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
1-2967
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
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))
ITEM
      8.01 Other Events.
Reference
      is made to Note 3 - Rate and Regulatory Matters and Note 13 - Related Party
      Transactions to our financial statements under Part II, Item 8; Outlook and
      Liquidity and Capital Resources under Part II, Item 7. Management's Discussion
      and Analysis of Financial Condition and Results of Operations; and Part I,
      Item
      1A. Risk Factors in the Form 10-K for the year ended December 31, 2006, of
      registrant Ameren Corporation ("Ameren") and its registrant subsidiaries, Union
      Electric Company, doing business as AmerenUE ("UE"), Central Illinois Public
      Service Company, doing business as AmerenCIPS ("CIPS"), 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 the process for power
      procurement for Ameren's Illinois utility companies following the expiration of
      the Illinois electric rate freeze on January 1, 2007, and power supply contracts
      on December 31, 2006, a discussion of credit rating changes issued in response
      to potential actions in Illinois that could threaten the financial solvency
      of
      CIPS, CILCO and IP and their ability to procure power, and a discussion of
      the
      delivery service rate cases filed by Ameren's Illinois utility companies with
      the Illinois Commerce Commission ("ICC") in December 2005 and by UE with the
      Missouri Public Service Commission in July 2006.
On
      March
      12, 2007, Moody's Investors Service, Inc. ("Moody's") downgraded the credit
      ratings of Ameren, UE, CIPS, CILCORP, CILCO, and IP as set forth in the
      following table:
From
To
Ameren:
Issuer
                Credit Rating
Baa1
Baa2
Senior
                Unsecured
Baa1
Baa2
UE:
Issuer
                Credit Rating
A3
Baa1
Senior
                Secured
A2
A3
Preferred
                Stock
Baa2
Baa3
CIPS:
Issuer
                Credit Rating
Baa3
Ba1
Senior
                Secured
Baa2
Baa3
Preferred
                Stock
Ba2
Ba3
CILCORP:
Senior
                Unsecured
Ba1
Ba2
CILCO:
Issuer
                Credit Rating
Baa2
Ba1
Senior
                Secured
Baa1
Baa2
-2-
IP:
Issuer
                Credit Rating
Baa3
Ba1
Senior
                Secured
Baa2
Baa3
Preferred
                Stock
Ba2
Ba3
*
A
                credit rating is not a recommendation to buy, sell or hold securities.
                It
                should be
evaluated
                independently of any other rating. Ratings are subject to revision
                or
withdrawal
                at any time by the rating
                organization.
In
      addition, Moody's assigned to CILCORP a corporate family credit rating of "Ba1"
and a probability of default rating of "Ba1". Moody's indicated that the ratings
      of Ameren, CIPS, CILCORP, CILCO and IP remain on review for possible further
      downgrade. Moody's also placed Ameren's "Prime-2" short-term credit rating for
      commercial paper on review for possible downgrade. The ratings of UE are no
      longer on review although the rating outlook is negative.
Moody's
      indicated that the downgrade of the ratings of Ameren, CIPS, CILCORP, CILCO
      and
      IP was prompted by the passage of rate freeze legislation by both the Illinois
      House of Representatives on March 6, 2007, and the Environment and Energy
      Committee of the Illinois Senate on March 7, 2007, and the growing support
      for a
      rate freeze in both chambers of the Illinois General Assembly. Moody's indicated
      that the ratings of Ameren, CIPS, CILCORP, CILCO and IP are under review for
      possible future downgrade. In the event of the passage and enactment of rate
      freeze legislation, Moody's indicated that the Ameren Illinois utilities could
      be downgraded further into speculative (junk) grade.
Moody's
      indicated that the downgrade of UE was prompted by higher costs, lower financial
      metrics and a continued challenging regulatory environment in Missouri. The
      downgrade also reflects Moody's expectation that Ameren may have to rely more
      heavily on UE for upstreamed dividends if rate freeze legislation is passed
      and
      enacted in Illinois.
As
      a
      result of the downgrade by Moody's of CIPS', CILCO's and IP's credit ratings
      below investment grade (junk) status, these companies delivered a letter to
      the
      ICC on March 14, 2007. The letter indicated that the Ameren Illinois utilities
      would be unable to offer the $20 million one-time customer bill credit intended
      to assist high-use residential customers that was initially proposed on March
      7,
      2007. The letter also indicated that the Ameren Illinois utilities would be
      unable to offer the customer elect phase-in plan, including the recent amendment
      which would have provided for 0% interest on a deferred portion of customers'
bills. The Ameren Illinois utilities also notified the ICC that the voluntary
      $15 million contribution that the utilities intended to make to fund energy
      assistance and energy efficiency initiatives would not be made as well. The
      Ameren Illinois utilities took such steps because of the need to marshal their
      resources to fund ongoing utility operations.
On
      March
      9, 2007, Standard & Poor's Ratings Services, a division of The McGraw-Hill
      Companies ("S&P"), issued a report in response to the passage by the
      Environment and Energy Committee of the Illinois Senate of legislation which
      would roll back rates to 2006 levels and freeze rates for at least six months.
      S&P indicated in its report that if such bill was passed by the full Senate,
      the issuer credit ratings on the Ameren Illinois utilities would be immediately
      lowered to "BB+". According to S&P, such a downgrade would reflect growing
      sentiment in both chambers of the Illinois General Assembly of the need for
      rate
      relief for certain affected customers of the Ameren Illinois utilities. S&P
      indicated that it would further lower the ratings on the Ameren Illinois
      utilities if rate freeze legislation "of any meaningful length" is approved by
      both chambers of the Illinois General Assembly, and such ratings may be lowered
      precipitously in such circumstance.
As
      a
      result of the downgrade by Moody's of the issuer credit ratings of CIPS, CILCO
      and IP below investment-grade status, CIPS, CILCO and IP expect that they may
      be
      faced with reduced access to capital. The downgrade may also increase the cost
      of borrowing and fuel, power and gas supply, among other things, resulting
      in a
      negative impact on earnings. CIPS, CILCO, and IP may also be required to post
      collateral or other assurances for
-3-
certain
      trade obligations. In addition, the cost of borrowing under our credit
      facilities can increase or decrease depending upon the credit ratings of the
      borrower. Suppliers may also request prepayment for products and
      services.
-
      - - - -
      - - - - - - - - - - - - - - -
This
      combined Form 8-K is being filed separately by Ameren, UE, CIPS, 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, such as in UE's pending electric and gas rate
                cases and the outcome of CIPS, CILCO and IP rate rehearing proceedings,
                or
                the enactment of legislation freezing electric rates at 2006 levels
                or
                similar actions that impair the full and timely recovery of costs
                in
                Illinois;
·
the
                impact of the termination of the joint dispatch agreement, among
                UE, CIPS
                and Ameren Energy Generating
                Company;
·
changes
                in laws and other governmental actions, including monetary and fiscal
                policies;
·
the
                effects of increased competition in the future due to, among other
                things,
                deregulation of certain aspects of our business at both the state
                and
                federal levels, and the implementation of deregulation, such as occurred
                when the electric rate freeze and power supply contracts expired
                in
                Illinois at the end of 2006;
·
the
                effects of participation in the Midwest Independent Transmission
                System
                Operator, Inc.;
·
the
                availability of fuel such as coal, natural gas, and enriched uranium
                used
                to produce electricity; the availability of purchased power and natural
                gas for distribution; and the level and volatility of future market
                prices
                for such commodities, including the ability to recover the costs
                for such
                commodities;
·
the
                effectiveness of our risk management strategies and the use of financial
                and derivative instruments;
·
prices
                for power in the Midwest;
·
business
                and economic conditions, including their impact on interest
                rates;
·
disruptions
                of the capital markets or other events that make access to necessary
                capital more difficult or costly;
·
the
                impact of the adoption of new accounting standards and the application
                of
                appropriate technical accounting rules and
                guidance;
·
actions
                of credit rating agencies and the effects of such
                actions;
·
weather
                conditions and other natural
                phenomena;
·
the
                impact of system outages caused by severe weather conditions or other
                events;
·
generation
                plant construction, installation and performance, including costs
                associated with UE's Taum Sauk pumped-storage hydroelectric plant incident
                and the plant's future operation;
·
recoverability
                through insurance of costs associated with UE's Taum Sauk pumped-storage
                hydroelectric plant incident;
·
operation
                of UE's nuclear power facility, including planned and unplanned outages,
                and decommissioning costs;
·
the
                effects of strategic initiatives, including acquisitions and
                divestitures;
-4-
·
the
                impact of current environmental regulations on utilities and power
                generating companies and the expectation that more stringent requirements,
                including those related to greenhouse gases, will be introduced over
                time,
                which could have a negative financial
                effect;
·
labor
                disputes, future wage and employee benefits costs, including changes
                in
                returns on benefit plan assets;
·
the
                inability of our counterparties and affiliates to meet their obligations
                with respect to contracts and financial
                instruments;
·
the
                cost and availability of transmission capacity for the energy generated
                by
                the Ameren companies' facilities or required to satisfy energy sales made
                by the Ameren companies;
·
legal
                and administrative proceedings; and
·
acts
                of sabotage, war, terrorism or intentionally disruptive
                acts.
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.
-5-
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/
      Jerre E.
      Birdsong
Jerre
      E.
      Birdsong
Vice
      President and Treasurer
UNION
      ELECTRIC COMPANY
(Registrant)
/s/
      Jerre
      E.
      Birdsong
Jerre
      E.
      Birdsong
Vice
      President and Treasurer
CENTRAL
      ILLINOIS PUBLIC SERVICE COMPANY
(Registrant)
/s/
      Jerre E.
      Birdsong
Jerre
      E.
      Birdsong
Vice
      President and Treasurer
CILCORP
      Inc.
(Registrant)
/s/
      Jerre E.
      Birdsong
Jerre
      E.
      Birdsong
Vice
      President and Treasurer
CENTRAL
      ILLINOIS LIGHT COMPANY
(Registrant)
/s/
      Jerre E.
      Birdsong
Jerre
      E.
      Birdsong
Vice
      President and Treasurer
ILLINOIS
      POWER COMPANY
(Registrant)
/s/
      Jerre E.
      Birdsong
Jerre
      E.
      Birdsong
Vice
      President and Treasurer
Date:
      March 15, 2007
-6-