<html>
  <head>
    <title>ameren8k04232009.htm</title>
<!-- Licensed to: 924edg-->
<!-- Document Created using EDGARizer 4.0.6.1 -->
<!-- Copyright 1995 - 2008 EDGARfilings, Ltd., an IEC company. All rights reserved -->
</head>
    <body bgcolor="#ffffff" style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">
    <div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#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">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>
      <div>
        <table cellpadding="0" cellspacing="0" width="100%">
            <tr>
              <td valign="top" width="24%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font>

                <hr style="COLOR: black" align="center" noshade size="2" width="20%">    </td>
            </tr>
            <tr>
              <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">FORM
      8-K</font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="24%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
        </table>
      </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">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 style="DISPLAY: block; TEXT-INDENT: 0pt"><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%">
            <tr>
              <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">April
      23, 2009</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="89%">
            <tr>
              <td valign="top" width="29%">
                <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"><font style="DISPLAY: inline; TEXT-DECORATION: underline">Commission File
      Number</font></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">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"><font style="DISPLAY: inline; TEXT-DECORATION: underline">Address and Telephone
      Number</font></font></div>
                <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
              </td>
              <td valign="top" width="25%">
                <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"><font style="DISPLAY: inline; TEXT-DECORATION: underline">Identification
      Number</font></font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="29%">
                <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 style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
              </td>
              <td valign="top" width="25%">
                <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 valign="top" width="29%">
                <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">1-2967</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">Union
      Electric 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">(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, MO 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 style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
              </td>
              <td valign="top" width="25%">
                <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">43-0559760</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><a name="Address" /><a name="Zip"><br></a></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">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:</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: 36pt; 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: 36pt; 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: 36pt; 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: 36pt; 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 style="DISPLAY: block; TEXT-INDENT: 0pt"><br></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">
          </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><br><br>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">ITEM
8.01&#160;&#160;Other Events.</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></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">Reference
is made to Supply for Electric Power in Business under Part I, Item 1, Outlook
in Management&#8217;s Discussion and Analysis of Financial Condition and Results of
Operations under Part II, Item 7 and to Note 2 &#8211; Rate and Regulatory Matters and
Note 15 &#8211; Commitments and Contingencies to our financial statements under Part
II, Item 8, each in the Form 10-K for the fiscal year ended December 31, 2008
(&#8220;Form 10-K&#8221;), of registrant Ameren Corporation (&#8220;Ameren&#8221;) and its registrant
subsidiary, Union Electric Company, doing business as AmerenUE (&#8220;UE&#8221;), for a
discussion of actions taken by UE with respect to a potential new nuclear unit
at UE&#8217;s existing Callaway County, Missouri, nuclear plant site.</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></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">In the
Form 10-K, UE disclosed that it was evaluating its longer-term needs for new
baseload and peaking electric generation capacity. At that time, UE did not
expect to require new baseload generation capacity until 2018 to 2020. However,
due to the significant time required to plan, acquire permits for, and build a
baseload power plant, UE was actively studying future plant alternatives,
including nuclear.&#160;&#160;In July 2008, UE filed a combined construction and
operating license application (&#8220;COLA&#8221;) with the Nuclear Regulatory Commission
for a potential new nuclear unit at UE&#8217;s existing Callaway County, Missouri,
nuclear plant site. Pursuant to the Department of Energy&#8217;s (&#8220;DOE&#8221;) procedures,
in 2008 UE filed with the DOE Part I and Part II of its application for a loan
guarantee to support the potential construction of a new nuclear unit. UE has
also signed contracts for COLA services and certain long lead-time nuclear-unit
related equipment (heavy forgings). The filing of the COLA and the DOE loan
guarantee application and entering into these contracts did not mean a decision
had been made to build a new nuclear unit. These were only the first steps in
the regulatory licensing and procurement process. They were necessary actions to
preserve the option to develop a new nuclear unit to supply power to UE&#8217;s
customers.</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></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">In
addition, UE disclosed in the Form 10-K that the Missouri Clean and Renewable
Energy Construction Act&#160;was separately introduced in both the Missouri
Senate and House of Representatives in early 2009. These bills were designed to
allow the Missouri Public Service Commission to authorize, among other things,
utilities to recover the costs of financing and tax payments associated with a
new generating plant while that plant is being constructed. UE also stated in
the Form 10-K that legislation allowing timely recovery of financing costs
during construction must be enacted in order for UE to elect to build a new
nuclear unit to meet its baseload generation capacity needs. However, passage of
such legislation did not commit or guarantee that UE will elect to build a new
nuclear unit.</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></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">On April
23, 2009, senior management of UE, announced that they had asked the legislative
sponsors of the Missouri Clean and Renewable Energy Construction Act to withdraw
the bills from consideration by the General Assembly.&#160;&#160;UE believed
pursuing the legislation being considered in the Senate in its current form
would not give it the financial and regulatory certainty needed to complete the
project. As a result, UE announced that it was suspending its efforts to build a
new nuclear unit at its existing Missouri nuclear plant site. UE indicated it
would continue to look at options for providing the electricity its customers
will need in the coming years. UE&#8217;s press release regarding these events is
attached as Exhibit 99.1 and is incorporated herein by reference.</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></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">As of
March 31, 2009, UE has capitalized approximately $75 million as construction
work in progress related to the COLA and heavy forgings.&#160;&#160;In addition,
UE has remaining contractual commitments of approximately $85 million for the
forgings.&#160;&#160;The incurred costs will remain capitalized while management
assesses all options to maximize the value of its investment in this
project.&#160;&#160;However, UE cannot at this time predict which option will
ultimately be selected, whether any or all of its investment in this project
will be realized or whether there will be a material impact on UE&#8217;s and Ameren&#8217;s
results of operations.</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">ITEM
9.01&#160;&#160;Financial Statements and Exhibits.</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><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">(d)
Exhibits.</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">
        <div style="DISPLAY: block; TEXT-INDENT: 0pt">
          <div align="left">
            <table cellpadding="0" cellspacing="0" width="96%">
                <tr>
                  <td align="left" valign="top" width="19%">
                    <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 style="TEXT-DECORATION: underline"><font style="DISPLAY: inline; TEXT-DECORATION: underline">Exhibit
      Number</font>:</font></font></div>
                    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
                  </td>
                  <td align="left" valign="top" width="49%">
                    <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 style="TEXT-DECORATION: underline"><font style="DISPLAY: inline; TEXT-DECORATION: underline">Title</font>:</font></font></div>
                  </td>
                </tr>
                <tr>
                  <td align="left" valign="top" width="19%">
                    <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">99.1</font></div>
                  </td>
                  <td align="left" valign="top" width="49%">
                    <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">Press
      release, dated April 23, 2009, regarding UE&#8217;s suspension of efforts to
      </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">build
      a new nuclear unit at its existing Callaway County, Missouri nuclear
      </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">plant
      site.</font></div>
                  </td>
                </tr>
            </table>
          </div><br><br></div>
      </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: 10pt; 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; TEXT-INDENT: 0pt"><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 style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></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">This
combined Form 8-K is being filed separately by Ameren and
UE.&#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 style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></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: 10pt; 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><br><br>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 306pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">SIGNATURES</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">&#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 style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 306pt; 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: 0pt; TEXT-INDENT: 306pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Registrant)</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 306pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">By:&#160;
<font style="DISPLAY: inline; TEXT-DECORATION: underline">&#160;/s/ Martin J.
Lyons&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 324pt; 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: 0pt; TEXT-INDENT: 324pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Senior
Vice President and Chief Accounting Officer</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 306pt; 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: 306pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Registrant)</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 306pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">By:
&#160;<font style="DISPLAY: inline; TEXT-DECORATION: underline">/s/ Martin J.
Lyons&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 324pt; 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: 0pt; TEXT-INDENT: 324pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Senior
Vice President and Chief Accounting Officer</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><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;April
23, 2009</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#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: 10pt; FONT-FAMILY: Times New Roman">-4-</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><br>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 297pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; TEXT-DECORATION: underline">Exhibit
Index</font></font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br>&#160;</div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">
        <div align="left">
          <table cellpadding="0" cellspacing="0" width="96%">
              <tr>
                <td align="left" valign="top" width="19%">
                  <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 style="TEXT-DECORATION: underline"><font style="DISPLAY: inline; TEXT-DECORATION: underline">Exhibit
      Number</font>:</font></font></div>
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
                </td>
                <td align="left" valign="top" width="49%">
                  <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 style="TEXT-DECORATION: underline"><font style="DISPLAY: inline; TEXT-DECORATION: underline">Title</font>:</font></font></div>
                </td>
              </tr>
              <tr>
                <td align="left" valign="top" width="19%">
                  <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">99.1</font></div>
                </td>
                <td align="left" valign="top" width="49%">
                  <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">Press
      release, dated April 23, 2009, regarding UE&#8217;s suspension of efforts to
      </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">build
      a new nuclear unit at its existing Callaway County, Missouri nuclear
      </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">plant
      site.</font></div>
                </td>
              </tr>
          </table>
        </div><br><br></div>
    </div>
  </body>
</html>
[{"type": "8-K", "sequence": "1", "filename": "ameren8k04232009.htm", "description": "AMEREN 8-K, DATED APRIL 23, 2009", "secsgml_size_bytes": 33075}]
[{"company-data": {"conformed-name": "UNION ELECTRIC CO", "cik": "0000100826", "assigned-sic": "4911", "irs-number": "430559760", "state-of-incorporation": "MO", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-02967", "film-number": "09765452"}, "business-address": {"street1": "1901 CHOUTEAU AVENUE", "street2": "MC 1370", "city": "ST LOUIS", "state": "MO", "zip": "63166", "phone": "314-621-3222"}, "mail-address": {"street1": "1901 CHOUTEAU AVENUE", "street2": "MC 1370", "city": "ST LOUIS", "state": "MO", "zip": "63166"}}, {"company-data": {"conformed-name": "AMEREN CORP", "cik": "0001002910", "assigned-sic": "4931", "irs-number": "431723446", "state-of-incorporation": "MO", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-14756", "film-number": "09765451"}, "business-address": {"street1": "1901 CHOUTEAU AVE", "street2": "MC 1370", "city": "ST LOUIS", "state": "MO", "zip": "63166-6149", "phone": "314-621-3222"}, "mail-address": {"street1": "1901 CHOUTEAU AVE", "street2": "MC 1370", "city": "ST LOUIS", "state": "MO", "zip": "63103"}}]
ameren8k04232009.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):
April
      23, 2009
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, MO 63103
(314)
      621-3222
43-0559760
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 Supply for Electric Power in Business under Part I, Item 1, Outlook
in Management's Discussion and Analysis of Financial Condition and Results of
Operations under Part II, Item 7 and to Note 2 – Rate and Regulatory Matters and
Note 15 – Commitments and Contingencies to our financial statements under Part
II, Item 8, each in the Form 10-K for the fiscal year ended December 31, 2008
("Form 10-K"), of registrant Ameren Corporation ("Ameren") and its registrant
subsidiary, Union Electric Company, doing business as AmerenUE ("UE"), for a
discussion of actions taken by UE with respect to a potential new nuclear unit
at UE's existing Callaway County, Missouri, nuclear plant site.
In the
Form 10-K, UE disclosed that it was evaluating its longer-term needs for new
baseload and peaking electric generation capacity. At that time, UE did not
expect to require new baseload generation capacity until 2018 to 2020. However,
due to the significant time required to plan, acquire permits for, and build a
baseload power plant, UE was actively studying future plant alternatives,
including nuclear.  In July 2008, UE filed a combined construction and
operating license application ("COLA") with the Nuclear Regulatory Commission
for a potential new nuclear unit at UE's existing Callaway County, Missouri,
nuclear plant site. Pursuant to the Department of Energy's ("DOE") procedures,
in 2008 UE filed with the DOE Part I and Part II of its application for a loan
guarantee to support the potential construction of a new nuclear unit. UE has
also signed contracts for COLA services and certain long lead-time nuclear-unit
related equipment (heavy forgings). The filing of the COLA and the DOE loan
guarantee application and entering into these contracts did not mean a decision
had been made to build a new nuclear unit. These were only the first steps in
the regulatory licensing and procurement process. They were necessary actions to
preserve the option to develop a new nuclear unit to supply power to UE's
customers.
In
addition, UE disclosed in the Form 10-K that the Missouri Clean and Renewable
Energy Construction Act was separately introduced in both the Missouri
Senate and House of Representatives in early 2009. These bills were designed to
allow the Missouri Public Service Commission to authorize, among other things,
utilities to recover the costs of financing and tax payments associated with a
new generating plant while that plant is being constructed. UE also stated in
the Form 10-K that legislation allowing timely recovery of financing costs
during construction must be enacted in order for UE to elect to build a new
nuclear unit to meet its baseload generation capacity needs. However, passage of
such legislation did not commit or guarantee that UE will elect to build a new
nuclear unit.
On April
23, 2009, senior management of UE, announced that they had asked the legislative
sponsors of the Missouri Clean and Renewable Energy Construction Act to withdraw
the bills from consideration by the General Assembly.  UE believed
pursuing the legislation being considered in the Senate in its current form
would not give it the financial and regulatory certainty needed to complete the
project. As a result, UE announced that it was suspending its efforts to build a
new nuclear unit at its existing Missouri nuclear plant site. UE indicated it
would continue to look at options for providing the electricity its customers
will need in the coming years. UE's press release regarding these events is
attached as Exhibit 99.1 and is incorporated herein by reference.
As of
March 31, 2009, UE has capitalized approximately $75 million as construction
work in progress related to the COLA and heavy forgings.  In addition,
UE has remaining contractual commitments of approximately $85 million for the
forgings.  The incurred costs will remain capitalized while management
assesses all options to maximize the value of its investment in this
project.  However, UE cannot at this time predict which option will
ultimately be selected, whether any or all of its investment in this project
will be realized or whether there will be a material impact on UE's and Ameren's
results of operations.
ITEM
9.01  Financial Statements and Exhibits.
(d)
Exhibits.
Exhibit
      Number
:
Title
:
99.1
Press
      release, dated April 23, 2009, regarding UE's suspension of efforts to
build
      a new nuclear unit at its existing Callaway County, Missouri nuclear
plant
      site.
-2-
- - - - -
- - - - - - - - - - - - - - -
This
combined Form 8-K is being filed separately by Ameren and
UE.  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.
-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)
By:
/s/ Martin J.
Lyons
Martin J.
Lyons
Senior
Vice President and Chief Accounting Officer
UNION
ELECTRIC COMPANY
(Registrant)
By:
/s/ Martin J.
Lyons
Martin J.
Lyons
Senior
Vice President and Chief Accounting Officer
Date:  April
23, 2009
-4-
Exhibit
Index
Exhibit
      Number
:
Title
:
99.1
Press
      release, dated April 23, 2009, regarding UE's suspension of efforts to
build
      a new nuclear unit at its existing Callaway County, Missouri nuclear
plant
      site.