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      Ameren 8-K, dated December 5, 2006
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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"><strong>UNITED
      STATES</strong></font></div>
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      AND EXCHANGE COMMISSION</strong></font></div>
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      D.C. 20549 </font></div>
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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="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>FORM
      8-K </strong></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"><strong>CURRENT
                REPORT </strong></font></div>
            </td>
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          <tr>
            <td colspan="3" valign="middle" width="80%">
              <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>
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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">Securities
                Exchange Act of 1934 </font></div>
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            </td>
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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></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">November
                29, 2006</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="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>AMEREN
                CORPORATION </strong></font></div>
            </td>
          </tr>
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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">(Exact
                name of registrant as specified in its charter) </font></div>
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            </td>
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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">Missouri
                </font></div>
            </td>
            <td valign="bottom" width="34%">
              <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">1-14756
                </font></div>
            </td>
            <td valign="bottom" width="22%">
              <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">43-1723446
                </font></div>
            </td>
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            <td align="left" valign="middle" width="23%">
              <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">(State
                or other jurisdiction </font></div>
            </td>
            <td valign="middle" width="34%">
              <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">(Commission
                </font></div>
            </td>
            <td valign="middle" width="22%">
              <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">(I.R.S.
                Employer </font></div>
            </td>
          </tr>
          <tr>
            <td valign="middle" width="23%">
              <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">of
                incorporation) </font></div>
            </td>
            <td valign="middle" width="34%">
              <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">File
                Number) </font></div>
            </td>
            <td valign="middle" width="22%">
              <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">Identification
                No.) </font></div>
            </td>
          </tr>

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    <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="justify">&#160;</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">1901
      Chouteau Avenue, St. Louis, Missouri 63103 </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">(Address
      of principal executive offices) </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="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Registrant&#8217;s
      telephone number, including area code: (314) 621-3222 </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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    <div 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 registrant under any of the following
      provisions: </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">[&#160;
]
      Written communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425) </font></div>
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      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; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">[&#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; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">[&#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>
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      <div>&#160;</div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 72pt; TEXT-INDENT: -72pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 72pt; TEXT-INDENT: -72pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Item
      5.02&#160;&#160; </strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Departure
      of Directors or Certain Officers; Election of Directors; Appointment of Certain
      Officers; Compensatory Arrangements of Certain Officers. </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="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On
      November 29, 2006, Ameren Corporation (the &#8220;Company&#8221;) adopted the Ameren
      Deferred Compensation Plan (the &#8220;New Deferred Compensation Plan&#8221;), which merges
      the portion of the Ameren Corporation Executive Incentive Compensation Program
      Elective Deferral Provisions for Members of the Ameren Leadership Team which
      relates to post-2004 deferrals into the portion of the Ameren Corporation
      Deferred Compensation Plan which relates to post-2004 deferrals and amends
      and
      restates the foregoing. The New Deferred Compensation Plan permits deferrals
      of
      a portion of salary and all or a portion of cash incentive award compensation.
      The New Deferred Compensation Plan is effective as of January 1, 2007 and will
      apply to compensation paid to participants on and after such date. A copy of
      the
      New Deferred Compensation Plan is filed as Exhibit 10.1 to this Current Report
      on Form 8-K. </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: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Under
      the
      New Deferred Compensation Plan, executive officers and certain key employees
      may
      annually (or the first day of the month following the commencement of employment
      or promotion) choose to defer up to 50 percent (in one percent increments)
      of
      their salary and up to 100 percent (in one percent increments or amounts in
      excess of a threshold) for cash incentive awards. At the request of a
      participant, the Company may, in its discretion, waive the 50 percent
      limitation. There are no minimum dollar thresholds for deferrals. Deferred
      amounts under the New Deferred Compensation Plan earn interest at 150 percent
      of
      the average Mergent&#8217;s Seasoned AAA Corporate Bond Yield Index (&#8220;Mergent&#8217;s
      Index,&#8221; formerly called Moody&#8217;s Index) rate while the participant is employed by
      the Company or one of its subsidiaries. After the participant terminates
      employment for any reason, the deferred amounts under the New Deferred
      Compensation Plan earn the average Mergent&#8217;s Index rate. For 2006, the average
      Mergent&#8217;s Index rate was 5.24 percent, 150 percent of which was 7.86 percent.
      Interest rates are calculated annually as of January&#160;1. </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: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">A
      participant may choose to receive the deferred amounts at retirement in a lump
      sum payment or in installments over a set period of up to 15 years. In the
      event
      a participant terminates employment with the Company and its subsidiaries prior
      to age 55, the balance in such participant&#8217;s deferral account is distributable
      in a lump sum to the participant within 30 days of the date the participant
      terminates employment. In the event a participant terminates employment with
      the
      Company and its subsidiaries prior to age 55 and after the occurrence of a
      Change of Control (as defined in Amended and Restated Ameren Corporation Change
      of Control Severance Plan, which Plan was filed with the Securities and Exchange
      Commission on February&#160;16, 2006 as an exhibit to the Company&#8217;s Current
      Report on Form&#160;8-K dated February&#160;10, 2006) the balance in such
      participant&#8217;s deferral account, including interest payable at 150 percent of the
      average Mergent&#8217;s Index rate, is distributable in a lump sum to the participant
      within 30 days of the date the participant terminates employment.</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"><br></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: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On
      November&#160;29, 2006, the Company adopted the Ameren Deferred Compensation
      Plan for Members of the Board of Directors (the &#8220;New Directors Deferred
      Compensation Plan&#8221;), which amends and restates the portion of the Ameren
      Corporation Deferred Compensation Plan for Members of the Board of Directors
      which is subject to Section&#160;409A of the Internal Revenue Code of 1986, as
      amended. The New Directors Deferred Compensation Plan permits non-management
      directors of the Company to annually (or on the first day of the month following
      initial election to the Board) choose to defer up to 100 percent (in increments
      of one percent) of cash retainers and meeting fees. There are no minimum dollar
      thresholds for deferrals. The New Directors Deferred Compensation Plan is
      effective as of January 1, 2007 and will apply to cash retainers and meeting
      fees paid to non-management directors on and after such date. Deferred amounts
      earn interest at 150 percent of the average Mergent&#8217;s Index rate while the
      participant is a member of the Company&#8217;s Board of Directors. After the
      participant ceases to be a member of the Company&#8217;s Board of Directors for any
      reason after attainment of at least age 55 or dies, the deferred amounts earn
      interest at the average Mergent&#8217;s Index rate. Interest rates are calculated
      annually as of January&#160;1. A copy of the New Directors Deferred Compensation
      Plan is filed as Exhibit 10.2 to this Current Report on Form 8-K.</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: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">A
      participant may choose to receive the deferred amounts upon ceasing to be a
      member of the Company&#8217;s Board of Directors in a lump sum payment or in
      installments over a set period of up to 15 years. However, in the event a
      participant ceases being a member of the Company&#8217;s Board of Directors prior to
      age 55, the balance in such participant&#8217;s deferral account shall be distributed
      in a lump sum to the participant within 30 days of the date the participant
      ceases being a member of the Company&#8217;s Board of Directors. In the event a
      participant ceases being a member of the Company&#8217;s Board of Directors prior to
      attainment of at least 55 years of age and after the occurrence of a Change
      of
      Control, the balance in such director&#8217;s deferral account, including interest
      payable at 150 percent of the average Mergent&#8217;s Index rate, shall be distributed
      in a lump sum to the director within 30 days after the date the director ceases
      being a member of the Board of Directors.</font></div><br>
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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"><strong>Item
      9.01&#160;&#160; </strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Financial
      Statements and Exhibits.</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: 45pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(d)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Exhibits</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: 45pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Exhibit
      Number</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">:<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;</font></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Title</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">:</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: 144pt; TEXT-INDENT: -144pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 72pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">10.1<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren
      Deferred Compensation Plan</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: 144pt; TEXT-INDENT: -144pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 72pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">10.2</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;&#160;&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;</font></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren
      Deferred Compensation Plan for Members of the Board of Directors</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"><br></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: 342pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>SIGNATURE
      </strong></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: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pursuant
      to the requirements of the Securities Exchange Act of 1934, the Registrant
      has
      duly caused this report to be signed on its behalf by the undersigned thereunto
      duly authorized. </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: 342pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>AMEREN
      CORPORATION</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 342pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Registrant)
      </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 216pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>/s/
      Martin J. Lyons
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</u></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 342pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Martin
      J.
      Lyons</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 216pt; 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
      President and Controller</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 216pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Principal
      Accounting Officer) </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"><br></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"><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">Date:
      December 5, 2006</font></div><br>
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      <div id="FTR">
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        <div style="WIDTH: 100%; TEXT-ALIGN: center">
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        <div style="WIDTH: 100%; TEXT-ALIGN: center">
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        <div id="GLHDR" style="WIDTH: 100%" align="right">
        </div>
      </div>
    </div><br>
    <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="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Exhibit
      Index</strong></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: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Exhibit
      No.<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;</strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Title</strong></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: 216pt; TEXT-INDENT: -180pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">10.1<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren
      Deferred Compensation Plan</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: 216pt; TEXT-INDENT: -180pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">10.2<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren
      Deferred Compensation Plan for Members of the Board of
      Directors</font></div>
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Ameren 8-K, dated December 5, 2006
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):
November
                29, 2006
AMEREN
                CORPORATION
(Exact
                name of registrant as specified in its charter)
Missouri
1-14756
43-1723446
(State
                or other jurisdiction
(Commission
(I.R.S.
                Employer
of
                incorporation)
File
                Number)
Identification
                No.)
1901
      Chouteau Avenue, St. Louis, Missouri 63103
(Address
      of principal executive offices)
Registrant's
      telephone number, including area code: (314) 621-3222
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
      5.02
Departure
      of Directors or Certain Officers; Election of Directors; Appointment of Certain
      Officers; Compensatory Arrangements of Certain Officers.
On
      November 29, 2006, Ameren Corporation (the "Company") adopted the Ameren
      Deferred Compensation Plan (the "New Deferred Compensation Plan"), which merges
      the portion of the Ameren Corporation Executive Incentive Compensation Program
      Elective Deferral Provisions for Members of the Ameren Leadership Team which
      relates to post-2004 deferrals into the portion of the Ameren Corporation
      Deferred Compensation Plan which relates to post-2004 deferrals and amends
      and
      restates the foregoing. The New Deferred Compensation Plan permits deferrals
      of
      a portion of salary and all or a portion of cash incentive award compensation.
      The New Deferred Compensation Plan is effective as of January 1, 2007 and will
      apply to compensation paid to participants on and after such date. A copy of
      the
      New Deferred Compensation Plan is filed as Exhibit 10.1 to this Current Report
      on Form 8-K.
Under
      the
      New Deferred Compensation Plan, executive officers and certain key employees
      may
      annually (or the first day of the month following the commencement of employment
      or promotion) choose to defer up to 50 percent (in one percent increments)
      of
      their salary and up to 100 percent (in one percent increments or amounts in
      excess of a threshold) for cash incentive awards. At the request of a
      participant, the Company may, in its discretion, waive the 50 percent
      limitation. There are no minimum dollar thresholds for deferrals. Deferred
      amounts under the New Deferred Compensation Plan earn interest at 150 percent
      of
      the average Mergent's Seasoned AAA Corporate Bond Yield Index ("Mergent's
      Index," formerly called Moody's Index) rate while the participant is employed by
      the Company or one of its subsidiaries. After the participant terminates
      employment for any reason, the deferred amounts under the New Deferred
      Compensation Plan earn the average Mergent's Index rate. For 2006, the average
      Mergent's Index rate was 5.24 percent, 150 percent of which was 7.86 percent.
      Interest rates are calculated annually as of January 1.
A
      participant may choose to receive the deferred amounts at retirement in a lump
      sum payment or in installments over a set period of up to 15 years. In the
      event
      a participant terminates employment with the Company and its subsidiaries prior
      to age 55, the balance in such participant's deferral account is distributable
      in a lump sum to the participant within 30 days of the date the participant
      terminates employment. In the event a participant terminates employment with
      the
      Company and its subsidiaries prior to age 55 and after the occurrence of a
      Change of Control (as defined in Amended and Restated Ameren Corporation Change
      of Control Severance Plan, which Plan was filed with the Securities and Exchange
      Commission on February 16, 2006 as an exhibit to the Company's Current
      Report on Form 8-K dated February 10, 2006) the balance in such
      participant's deferral account, including interest payable at 150 percent of the
      average Mergent's Index rate, is distributable in a lump sum to the participant
      within 30 days of the date the participant terminates employment.
On
      November 29, 2006, the Company adopted the Ameren Deferred Compensation
      Plan for Members of the Board of Directors (the "New Directors Deferred
      Compensation Plan"), which amends and restates the portion of the Ameren
      Corporation Deferred Compensation Plan for Members of the Board of Directors
      which is subject to Section 409A of the Internal Revenue Code of 1986, as
      amended. The New Directors Deferred Compensation Plan permits non-management
      directors of the Company to annually (or on the first day of the month following
      initial election to the Board) choose to defer up to 100 percent (in increments
      of one percent) of cash retainers and meeting fees. There are no minimum dollar
      thresholds for deferrals. The New Directors Deferred Compensation Plan is
      effective as of January 1, 2007 and will apply to cash retainers and meeting
      fees paid to non-management directors on and after such date. Deferred amounts
      earn interest at 150 percent of the average Mergent's Index rate while the
      participant is a member of the Company's Board of Directors. After the
      participant ceases to be a member of the Company's Board of Directors for any
      reason after attainment of at least age 55 or dies, the deferred amounts earn
      interest at the average Mergent's Index rate. Interest rates are calculated
      annually as of January 1. A copy of the New Directors Deferred Compensation
      Plan is filed as Exhibit 10.2 to this Current Report on Form 8-K.
A
      participant may choose to receive the deferred amounts upon ceasing to be a
      member of the Company's Board of Directors in a lump sum payment or in
      installments over a set period of up to 15 years. However, in the event a
      participant ceases being a member of the Company's Board of Directors prior to
      age 55, the balance in such participant's deferral account shall be distributed
      in a lump sum to the participant within 30 days of the date the participant
      ceases being a member of the Company's Board of Directors. In the event a
      participant ceases being a member of the Company's Board of Directors prior to
      attainment of at least 55 years of age and after the occurrence of a Change
      of
      Control, the balance in such director's deferral account, including interest
      payable at 150 percent of the average Mergent's Index rate, shall be distributed
      in a lump sum to the director within 30 days after the date the director ceases
      being a member of the Board of Directors.
Item
      9.01
Financial
      Statements and Exhibits.
(d)
Exhibits
Exhibit
      Number
:
Title
:
10.1
Ameren
      Deferred Compensation Plan
10.2
Ameren
      Deferred Compensation Plan for Members of the Board of Directors
SIGNATURE
Pursuant
      to the requirements of the Securities Exchange Act of 1934, the Registrant
      has
      duly caused this report to be signed on its behalf by the undersigned thereunto
      duly authorized.
AMEREN
      CORPORATION
(Registrant)
/s/
      Martin J. Lyons
Martin
      J.
      Lyons
Vice
      President and Controller
(Principal
      Accounting Officer)
Date:
      December 5, 2006
Exhibit
      Index
Exhibit
      No.
Title
10.1
Ameren
      Deferred Compensation Plan
10.2
Ameren
      Deferred Compensation Plan for Members of the Board of
      Directors