SECURITIES AND EXCHANGE COMMISSION
                                 Washington, DC
                                   FORM U-6B-2
                           Certificate of Notification

     Filed by a registered  holding  company or subsidiary  thereof  pursuant to
Rule U-20-(d) [Reg.  Section  250.20,  P. 36,652] or U-47 [Reg.  Section 250.47,
P.36,620] adopted under the Public Utility Holding Company Act of 1935.

Certificate is filed by: Union Electric  Company d/b/a AmerenUE (a subsidiary of
Ameren Corporation).

     This certificate is notice that the above named company has issued, renewed
or guaranteed the security or securities  described herein which issue,  renewal
or guaranty was exempted from the  provisions of Section 6(a) of the Act and was
neither the subject of a  declaration  or  application  on Form U-1 nor included
within the exemption provided by Rule U-48 [Reg. Section 250.48, P. 36,621].

     1.   Type of securities ("draft", "promissory note"): Promissory Note.
     2.   Issue, renewal or guaranty: Issue.
     3.   Principal amount of each security: $200,000,000.
     4.   Rate of interest per annum of each security: 5.10%.
     5.   Date of issue, renewal, or guaranty of each security: July 28, 2003.
     6.   If renewal of security, give date of original issue: Not applicable.
     7.   Date of maturity of each security: August 1, 2018.
     8.   Name of the  person to whom  each  security  was  issued,  renewed  or
          guaranteed:  Goldman,  Sachs  & Co.,  Wachovia  Capital  Markets, LLC,
          Barclays  Capital Inc., BNP Paribas  Securities  Corp. and BNY Capital
          Markets, Inc., as underwriters, for sale to the public.
     9.   Collateral  given with each security,  if any: Union Electric  Company
          First Mortgage Bonds, Senior Notes Series DD.
    10.   Consideration received for each security: $198,394,000.
    11.   Application  of proceeds of each  security:  The net proceeds  will be
          used along with other funds (i) to repay  short-term  debt incurred to
          pay at  maturity  $100,000,000  principal  amount  of  Union  Electric
          Company 7.65% First Mortgage  Bonds due July 15, 2003;  (ii) to redeem
          prior to  maturity  $75  million  principal  amount of Union  Electric
          Company's  outstanding  7.15% First Mortgage Bonds due August 1, 2023;
          (iii) to repay $21,000,000 of outstanding short-term debt; and (iv) to
          pay associated redemption and other costs.
    12.   Indicate by a check after the applicable  statement  below whether the
          issue,  renewal or  guaranty  of each  security  was  exempt  from the
          provisions of Section 6(a) because of:
          a)   the  provisions  contained in the first sentence of Section 6(b):
               Not applicable.
          b)   the provisions  contained in the fourth sentence of Section 6(b):
               Not applicable.
          c)   the provisions contained in any rule of the Commission other than
               Rule U-48: [X].
    13.   If the  security or  securities  were exempt  from the  provisions  of
          Section 6(a) by virtue of the first sentence of Section 6(b), give the
          figures  which  indicate  that the  security or  securities  aggregate
          (together  with all  other  than  outstanding  notes  and  drafts of a
          maturity of nine  months or less,  exclusive  of days of grace,  as to
          which such company is primarily or secondarily liable) not more than 5
          percentum  of  the  principal  amount  and  par  value  of  the  other
          securities of such company then outstanding. (Demand notes, regardless
          of how long they may have been  outstanding,  shall be  considered  as
          maturing  in not more than nine months for  purposes of the  exemption
          from Section 6(a) of the Act granted by the first  sentence of Section
          6(b),: Not applicable.
    14.   If the  security  or  securities  are exempt  from the  provisions  of
          Section 6(a) because of the fourth  sentence of Section 6(b), name the
          security  outstanding  on January 1,  1935,  pursuant  to the terms of
          which the security or securities  herein  described  have been issued:
          Not applicable.
    15.   If the  security  or  securities  are exempt  from the  provisions  of
          Section  6(a)  because of any rule of the  Commission  other than Rule
          U-48  [Reg.ss..  250.48,  P.  36,621]  designate  the rule under which
          exemption is claimed: Rule 52.


                                              Union Electric Company
                                                d/b/a AmerenUE


                                              By:  /s/ Jerre E. Birdsong
                                                  ----------------------------
                                                       Jerre E. Birdsong
                                                  Vice President and Treasurer

Dated:  July 30, 2003