UNION ELECTRIC CO
10-K405, 2000-03-30
ELECTRIC SERVICES
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<PAGE>

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549
                                    FORM 10-K
                (X) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                   FOR THE FISCAL YEAR ENDED DECEMBER 31, 1999
                                       OR
              ( ) Transition report pursuant to Section 13 or 15(d)
                     of the Securities Exchange Act of 1934
                       For the transition period from to .

                          COMMISSION FILE NUMBER 1-2967

                             UNION ELECTRIC COMPANY
             (Exact name of registrant as specified in its charter)
            Missouri                                     43-0559760
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
incorporation or organization)
                 1901 Chouteau Avenue, St. Louis, Missouri 63103
              (Address of principal executive offices and Zip Code)
       Registrant's telephone number, including area code: (314) 621-3222

           Securities Registered Pursuant to Section 12(b) of the Act:
               Title of each class  Name of each  exchange  on which  registered
Preferred Stock, without par value (entitled to cumulative dividends):
       Stated value $100 per share -    }
         $4.56 Series                   }
         $4.50 Series                   }          New York Stock Exchange
         $4.00 Series                   }
         $3.50 Series                   }

        Securities Registered Pursuant to Section 12(g) of the Act: None.

     Indicate  by check mark  whether the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days. Yes X . No .

     Indicate by check mark if disclosure of delinquent  filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. (X).

     Aggregate market value of voting stock held by  non-affiliates  as of March
6, 2000 , based on closing  prices most  recently  available  as reported in The
Wall Street Journal (excluding Preferred Stock for which quotes are not publicly
available): $40,056,825.

     Shares of Common  Stock,  $5 par  value,  outstanding  as of March 6, 2000:
102,123,834 shares (all owned by Ameren Corporation).

                      Documents incorporated by references.

     Portions of the registrant's definitive proxy statement for the 2000 annual
meeting are incorporated by reference into Part III.

<PAGE>


                                TABLE OF CONTENTS

PART I                                                                      Page

Item 1  -  Business
               General....................................................    1
               Capital Program and Financing..............................    1
               Rates......................................................    2
               Fuel Supply................................................    2
               Regulation.................................................    3
               Industry Issues............................................    4
Item 2  -  Properties.....................................................    4
Item 3  -  Legal Proceedings..............................................    6
Item 4  -  Submission of Matters to a Vote of Security Holders<F1>

Executive Officers of the Registrant (Item 401(b) of Regulation S-K)......    7

PART II

Item 5  -  Market for Registrant's Common Equity and Related
               Stockholder Matters........................................    7
Item 6  -  Selected Financial Data........................................    7
Item 7  -  Management's Discussion and Analysis of Financial Condition
               and Results of Operations..................................    8
Item 7A -  Quantitative and Qualitative Disclosures about Market Risk.....   16
Item 8  -  Financial Statements and Supplementary Data....................   18
Item 9  -  Changes in and Disagreements with Accountants on Accounting
               and Financial Disclosure1

PART III

Item 10 -  Directors and Executive Officers of the Registrant<F2>.........   37
Item 11 -  Executive Compensation2........................................   38
Item 12 -  Security Ownership of Certain Beneficial Owners
                    and Management2.......................................   38
Item 13 -  Certain Relationships and Related Transactions<F2>.............   38

PART IV

Item 14 -   Exhibits, Financial Statement Schedules and Reports on Form 8-K. 38

SIGNATURES     ............................................................  40
EXHIBITS       ............................................................  41

[FN]
<F1> Not applicable and not included herein.
<F2> Incorporated herein by reference.
</FN>


<PAGE>

                                     PART I

ITEM 1.  BUSINESS.

                                     GENERAL

     Union  Electric  Company  (AmerenUE or the  Registrant)  is a subsidiary of
Ameren  Corporation  (Ameren),  a holding company which is registered  under the
Public Utility Holding Company Act of 1935. On December 31, 1997, the Registrant
and  CIPSCO  Incorporated  (CIPSCO)  combined  with the  result  that the common
shareholders  of the  Registrant  and CIPSCO became the common  shareholders  of
Ameren,  and  Ameren  became  the  owner  of 100%  of the  common  stock  of the
Registrant and CIPSCO's operating subsidiaries,  Central Illinois Public Service
Company  (AmerenCIPS)  and CIPSCO  Investment  Company (the  Merger).  Since the
Merger, Ameren has formed a number of other subsidiaries including AmerenEnergy,
Inc.  which  serves as a power  marketing  agent for the  Registrant  and Ameren
Services Company which provides shared support  services to the Registrant.  For
additional information on the Registrant's business organization,  see Note 1 to
the "Notes to Financial Statements" under Item 8 herein.

     The Registrant,  incorporated in Missouri in 1922, is successor to a number
of companies,  the oldest of which was organized in 1881.  The Registrant is the
largest electric utility in the State of Missouri and supplies  electric service
in  territories  in Missouri and  Illinois  having an  estimated  population  of
2,600,000  within an area of  approximately  24,500 square miles,  including the
greater  St.  Louis  area.  Retail  gas  service  is  supplied  in  90  Missouri
communities and in the City of Alton, Illinois and vicinity.

     For the year 1999,  96% of total  operating  revenues  was derived from the
sale of electric energy and 4% from the sale of natural gas. Electric  operating
revenues as a percentage of total operating  revenues in both 1998 and 1997 were
also 96%.

     The Registrant  employed 4,184 persons at December 31, 1999.  Approximately
77% of such  employees  are  represented  by local  unions  affiliated  with the
AFL-CIO.  For  information on the status of labor  agreements with these unions,
see Note 12 to the "Notes to Financial Statements" under Item 8 herein.


                          CAPITAL PROGRAM AND FINANCING

     The  Registrant is engaged in a capital  program  under which  construction
expenditures are expected to approximate $297 million in 2000. For the five-year
period 2000-2004,  construction expenditures are estimated at $1.6 billion. This
estimate includes capital  expenditures which will be incurred by the Registrant
to meet new air quality standards for ozone and particulate matter.

     During the five-year  period ended 1999, gross additions to the property of
the  Registrant,  including  allowance  for funds used during  construction  and
excluding nuclear fuel, were  approximately $1.3 billion (including $228 million
in 1999) and property retirements were $347 million.

     In addition to the funds  required for  construction  during the  2000-2004
period,  $611 million will be required to repay  long-term debt as follows:  $11
million in 2000; $227 million in 2002; $100 million in 2003; and $273 million in
2004.  Amounts for years  subsequent  to 2000 do not  include  the  Registrant's
nuclear fuel lease payments since the amounts of such payments are not currently
determinable.

     The Registrant has transactions in the normal course of business with other
Ameren  subsidiaries  and has  the  ability  to  borrow  funds  from  Ameren  or
AmerenCIPS or invest funds through a regulated money pool agreement. At December
31, 1999,  the  Registrant  had  outstanding  intercompany  receivables  of $166
million through the regulated money pool.

                                      -1-

<PAGE>

     For information on the Registrant's capital program,  external cash sources
and  intercompany   borrowings,   see  "Liquidity  and  Capital   Resources"  in
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations"  under  Item 7  herein  and  Notes 3, 6, 8 and 12 to the  "Notes  to
Financial Statements" under Item 8 herein.

     Financing Restrictions.  Under the most restrictive earnings test contained
in the Registrant's  Indenture of Mortgage and Deed of Trust (Mortgage) relating
to its First Mortgage  Bonds (Bonds),  no Bonds may be issued (except in certain
refunding  operations)  unless  the  Registrant's  net  earnings  available  for
interest  after  depreciation  for 12  consecutive  months  within the 15 months
preceding  such issuance are at least two times annual  interest  charges on all
Bonds and prior lien bonds then  outstanding and to be issued (all calculated as
provided in the Mortgage).  Such ratio for the 12 months ended December 31, 1999
was 7.8, which would permit the  Registrant to issue an additional  $3.2 billion
of Bonds (8% annual interest rate assumed).  Additionally,  the Mortgage permits
issuance of new bonds up to (a) 60% of defined  property  additions,  or (b) the
amount of previous bonds retired or to be retired, or (c) the amount of cash put
up for such  purpose.  At  December  31,  1999,  the  aggregate  amount of Bonds
issuable under (a) and (b) above was approximately $2.4 billion.

     The Registrant's Restated Articles of Incorporation restrict the Registrant
from  selling  Preferred  Stock  unless  its net  earnings  for a  period  of 12
consecutive  months  within 15 months  preceding  such sale are at least two and
one-half  times the annual  dividend  requirements  on its Preferred  Stock then
outstanding  and to be issued.  Such ratio for the 12 months ended  December 31,
1999 was 39.5,  which would permit the  Registrant to issue an  additional  $1.6
billion  stated  value of Preferred  Stock (8% annual  dividend  rate  assumed).
Certain  other  financing  arrangements  require the  Registrant to obtain prior
consents to various actions by the Registrant,  including any future borrowings,
except for  permitted  financings  such as  borrowings  under  revolving  credit
agreements,  the nuclear fuel lease, unsecured short-term borrowings (subject to
certain conditions), and the issuance of additional Bonds.


                                      RATES

     For the year  1999,  approximately  83%,  6%,  and 11% of the  Registrant's
electric operating revenues were based on rates regulated by the Missouri Public
Service  Commission  (MoPSC),  the Illinois  Commerce  Commission (ICC), and the
Federal Energy  Regulatory  Commission (FERC) of the U. S. Department of Energy,
respectively.  For  information  on rate  matters  in these  jurisdictions,  see
"Electric  Industry  Restructuring" in "Management's  Discussion and Analysis of
Financial Condition and Results of Operations" under Item 7 herein and Note 2 to
the "Notes to Financial Statements" under Item 8 herein.

     In February 2000, the Registrant filed a request with the MoPSC to increase
rates approximately $12 million annually for natural gas service in its Missouri
jurisdiction. The MoPSC has until January 2001 to render a decision.

                                   FUEL SUPPLY
<TABLE>
<CAPTION>

Cost of Fuels                                                      Year
- -------------                   ----------------------------------------------------------------------------
                                    1999            1998            1997            1996           1995
                                    ----            ----            ----            ----           ----
<S>                             <C>             <C>             <C>             <C>            <C>
Per Million BTU  - Coal         100.685(cent)   100.015(cent)   105.600(cent)   112.250(cent)  117.645(cent)
                 - Nuclear       46.552(cent)    48.803(cent)    47.472(cent)    47.499(cent)   48.592(cent)
                 - System        89.833(cent)    90.378(cent)    92.816(cent)    96.596(cent)  101.590(cent)

Per kWh of Steam Generation        .958(cent)      .968(cent)      .979(cent)     1.024(cent)    1.068(cent)

</TABLE>

     Oil and Gas.  The actual  and  prospective  use of such  fuels for  utility
electric generation purposes is minimal,  and the Registrant has not experienced
and does not expect to experience difficulty in obtaining adequate supplies.

                                      -2-

<PAGE>

     Coal.  Because of  uncertainties of supply due to potential work stoppages,
equipment  breakdowns  and  other  factors,  the  Registrant  has  a  policy  of
maintaining a coal inventory consistent with its expected burn practices.

     Nuclear.  The  components  of the nuclear  fuel cycle  required for nuclear
generating  units are as follows:  (1) uranium;  (2)  conversion of uranium into
uranium hexafluoride;  (3) enrichment of uranium hexafluoride; (4) conversion of
enriched  uranium  hexafluoride  into uranium dioxide and the  fabrication  into
nuclear fuel assemblies;  and (5) disposal and/or  reprocessing of spent nuclear
fuel.

     The Registrant has  agreements  and/or  inventories to fulfill its Callaway
Nuclear Plant needs for uranium, enrichment, fabrication and conversion services
through  2002.  Additional  contracts  will have to be entered  into in order to
supply  nuclear fuel during the  remainder  of the life of the Plant,  at prices
which cannot now be accurately  predicted.  The Callaway Plant normally requires
refueling  at 18-month  intervals,  with the next  regular  refueling  presently
scheduled for the spring of 2001.

     Under the Nuclear Waste Policy Act of 1982, the U. S.  Department of Energy
(DOE) is  responsible  for the  permanent  storage and disposal of spent nuclear
fuel. DOE currently  charges one mill per nuclear generated  kilowatt-hour  sold
for future disposal of spent fuel.  Electric rates charged to customers  provide
for recovery of such costs.  DOE is not expected to have its  permanent  storage
facility  for spent fuel  available  until at least  2015.  The  Registrant  has
sufficient  storage  capacity  at the  Callaway  site  until  2020  and  has the
capability  for  additional  storage  capacity  through the licensed life of the
plant in 2024. The delayed  availability  of the DOE's disposal  facility is not
expected to adversely affect the continued operation of Callaway Plant.

     For additional  information on the Registrant's "Fuel Supply", see "Results
of Operations" in "Management's  Discussion and Analysis of Financial  Condition
and Results of Operations" under Item 7 herein and Notes 12 and 13 to the "Notes
to Financial Statements" under Item 8 herein.


                                   REGULATION

     The  Registrant  is subject to regulation  by the  Securities  and Exchange
Commission  and, as a subsidiary of Ameren,  is subject to the provisions of the
Public  Utility  Holding  Company  Act of 1935.  The  Registrant  is  subject to
regulation by the MoPSC and the ICC as to rates, service, accounts,  issuance of
equity  securities,  issuance  of debt  having a  maturity  of more than  twelve
months,  mergers,  and various other matters.  The Registrant is also subject to
regulation  by  the  FERC  as to  rates  and  charges  in  connection  with  the
transmission  of electric  energy in  interstate  commerce  and the sale of such
energy at wholesale in interstate commerce,  mergers, and certain other matters.
Authorization  to issue  debt  having a  maturity  of  twelve  months or less is
obtained from the Securities and Exchange Commission.

     For information on regulatory matters in these jurisdictions, including the
current status of electric utility  restructuring in Illinois and Missouri,  see
"Liquidity  and Capital  Resources"  and "Electric  Industry  Restructuring"  in
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations"  under Item 7 herein  and Notes 1 and 2 to the  "Notes to  Financial
Statements" under Item 8 herein.

     Operation of the  Callaway  Plant is subject to  regulation  by the Nuclear
Regulatory  Commission.  The  Registrant's  Facility  Operating  License for the
Callaway Plant expires on October 18, 2024. The Registrant's Osage hydroelectric
plant and its Taum Sauk  pumped-storage  hydro plant, as licensed projects under
the Federal  Power Act, are subject to certain  federal  regulations  affecting,
among other things,  the general operation and maintenance of the projects.  The
Registrant's  license for the Osage Plant expires on February 28, 2006,  and its
license  for the Taum Sauk Plant  expires  on June 30,  2010.  The  Registrant's
Keokuk Plant and dam located in the Mississippi River between Hamilton, Illinois
and Keokuk, Iowa, are operated under authority, unlimited in time, granted by an
Act of Congress in 1905.

                                      -3-

<PAGE>

     The Registrant is regulated, in certain of its operations, by air and water
pollution and hazardous waste regulations at the city, county, state and federal
levels.  The  Registrant  is  in  substantial   compliance  with  such  existing
regulations.

     Environmental   Issues.   See   "Liquidity   and  Capital   Resources"   in
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations"  under  Item 7  herein  and  Note  12 to  the  "Notes  to  Financial
Statements" under Item 8 herein for a discussion of environmental issues.


                                 INDUSTRY ISSUES

     The  Registrant  is facing  issues  common to the  electric and gas utility
industries  which have  emerged  during the past  several  years.  These  issues
include:  the  potential  for more  intense  competition  and for  changing  the
structure of regulation; changes in the structure of the industry as a result of
changes in federal  and state  laws,  including  the  formation  of  unregulated
generating  entities;  on-going  consideration  of  additional  changes  of  the
industry by federal and state authorities;  continually developing environmental
laws,  regulations  and issues,  including  proposed new air quality  standards;
public  concern  about the siting of new  facilities;  proposals for demand side
management  programs;  public  concerns  about nuclear  decommissioning  and the
disposal  of nuclear  wastes;  and global  climate  issues.  The  Registrant  is
monitoring  these issues and is unable to predict at this time what  impact,  if
any,  these  issues  will  have  on  its  operations,  financial  condition,  or
liquidity.

     For additional  information on certain of these issues,  see "Liquidity and
Capital  Resources"  and  "Electric  Industry   Restructuring"  in  Management's
Discussion and Analysis of Financial  Condition and Results of Operations" under
Item 7 herein  and  Notes 2, 12 and 13 to the  "Notes to  Financial  Statements"
under Item 8 herein.

     Year 2000  Issue.  The Year 2000 Issue  relates to how dates are stored and
used in computer systems,  applications,  and embedded  systems.  As the century
date  change  occurred,  certain  date-sensitive  systems had to  recognize  and
properly treat the year as 2000 and not as 1900. This inability to recognize and
properly  treat the year as 2000  could  have  caused  these  systems to process
critical  financial and  operational  information  incorrectly.  The  Registrant
encountered  no  significant  problems  associated  with the Year 2000  Issue at
year-end.  For information on this issue, see "Year 2000 Issue" in "Management's
Discussion and Analysis of Financial  Condition and Results of Operations" under
Item 7 herein.

ITEM 2.  PROPERTIES.

     In planning its construction program, the Registrant is presently utilizing
a forecast of  kilowatthour  sales  growth of  approximately  2.0% and peak load
growth of 1.4%, each compounded annually, and is providing for a minimum reserve
margin of approximately 15% above its anticipated peak load requirements.

     The Registrant is a member of one of the ten regional electric  reliability
councils  organized for  coordinating the planning and operation of the nation's
bulk  power  supply  -  MAIN  (Mid-America   Interconnected  Network)  operating
primarily in  Wisconsin,  Illinois and  Missouri.  The  Registrant's  bulk power
system is operated as an Ameren-wide  control area and transmission system under
the  FERC  approved  Joint  Dispatch   Agreement   between  the  Registrant  and
AmerenCIPS.  Ameren  has  interconnections  for  transmission  service  and  the
exchange of electric energy, directly and through the facilities of others, with
more than twenty power suppliers.

     The Registrant has also received  regulatory  approvals to join the Midwest
Independent   System  Operator   (Midwest  ISO)  which  will  operate   electric
transmission  systems and  maintain  system  reliability  and  security  for its
members. For a discussion of the Midwest ISO which is expected to be operational
in  the  year  2001,  see  "Electric  Industry  Restructuring"  in  Management's
Discussion and

                                      -4-

<PAGE>

Analysis of Financial  Condition and Results of Operations"  under Item 7 herein
and Note 2 to the "Notes to Financial Statements" under Item 8 herein.

     The  Registrant  owns 40% of the  capital  stock of Electric  Energy,  Inc.
("EEI"), and its affiliate,  AmerenCIPS,  owns 20% of such stock. The balance is
held by two other sponsoring com- panies -- Kentucky  Utilities  Company ("KU"),
and Illinova  Generating ("IG"). EEI owns and operates a generating plant with a
nominal  capacity of 1,000 mW. 50% of the  plant's  output is  committed  to the
Paducah Project of the DOE, 20% to KU, 15% to AmerenUE,  and 7.5% each to IG and
AmerenCIPS.

     As of December 31, 1999, the Registrant owned  approximately  3,300 circuit
miles of electric  transmission  lines. The Registrant also owned 2,800 miles of
gas mains and three  propane-air  gas plants used to  supplement  the  available
pipeline supply of natural gas during periods of abnormally high demands.  Other
properties of the Registrant  include  distribution  lines,  underground  cable,
steam distribution  facilities in Jefferson City, Missouri and office buildings,
warehouses, garages and repair shops.

     The  Registrant has fee title to all principal  plants and other  important
units of property,  or to the real property on which such facilities are located
(subject to mortgage liens securing  outstanding  indebtedness of the Registrant
and to  permitted  liens and  judgment  liens,  as  defined),  except that (i) a
portion of the Osage Plant  reservoir,  certain  facilities  at the Sioux Plant,
certain  of the  Registrant's  substations  and  most  of its  transmission  and
distribution  lines and gas mains are situated on lands  occupied  under leases,
easements,  franchises,  licenses or permits;  (ii) the United States and/or the
State of Missouri  own, or have or may have,  paramount  rights to certain lands
lying in the bed of the  Osage  River or  located  between  the  inner and outer
harbor lines of the  Mississippi  River,  on which certain  generating and other
properties  of the  Registrant  are located;  and (iii) the United States and/or
State of Illinois and/or State of Iowa and/or City of Keokuk,  Iowa own, or have
or may have, paramount rights with respect to, certain lands lying in the bed of
the  Mississippi  River on which a portion of the  Registrant's  Keokuk Plant is
located.

     Substantially all of the Registrant's  property and plant is subject to the
direct  first lien of an  Indenture of Mortgage and Deed of Trust dated June 15,
1937, as amended and supplemented.

     The following table sets forth information with respect to the Registrant's
generating facilities and capability at the time of the expected 2000 peak.

   Energy                                                     Gross Kilowatt
   Source            Plant                Location         Installed Capability
   ------            -----                --------         --------------------
   Coal          Labadie         Franklin County, MO             2,400,000
                 Rush Island     Jefferson County, MO            1,224,000
                 Sioux           St. Charles County, MO          1,006,000
                 Meramec         St. Louis County, MO              859,000
                                                              ------------
                                            Total Coal           5,489,000
   Nuclear       Callaway        Callaway County, MO             1,181,000
   Hydro         Osage           Lakeside, MO                      212,000
                 Keokuk          Keokuk, IA                        126,000
                                                              ------------
                                            Total Hydro            338,000
   Oil and       Venice          Venice, IL                        441,000
   Natural       Other           Various                           424,000*
                                                              ------------
   Gas                                      Total Oil and
                                              Natural Gas          865,000
   Pumped-
   storage       Taum Sauk       Reynolds County, MO               440,000
                                                              ------------
                                            TOTAL                8,313,000
                                                               ===========

*    Includes  48,000 gross  kilowatt  installed  capability of a new combustion
     turbine generator scheduled for service before the expected 2000 peak.

                                      -5-

<PAGE>

ITEM 3.  LEGAL PROCEEDINGS.

     The Registrant is involved in legal and  administrative  proceedings before
various  courts and  agencies  with  respect to matters  arising in the ordinary
course  of  business,  some of which  involve  substantial  amounts.  Management
believes  that  the  final  disposition  of  these  proceedings  will not have a
material  adverse  effect on its  financial  position,  results of operations or
liquidity.

     For additional  information on legal and  administrative  proceedings,  see
"Electric  Industry  Restructuring" in "Management's  Discussion and Analysis of
Financial  Condition and Results of Operations"  under Item 7 herein and Notes 2
and 12 to the "Notes to Financial Statements" under Item 8 herein.

                          _____________________________

     Statements made in this report which are not based on historical facts, are
"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,
financial  performance  and the Year 2000 Issue.  In  connection  with the "Safe
Harbor" provisions of the Private Securities  Litigation Reform Act of 1995, the
Registrant is 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 subsequent securities filings,  could cause results to differ materially from
management expectations as suggested by such "forward-looking"  statements:  the
effects of regulatory actions;  changes in laws and other governmental  actions;
the impact on the Registrant of current regulations related to the phasing-in of
the opportunity  for some customers to choose  alternative  energy  suppliers in
Illinois; the effects of increased competition in the future due to, among other
things, deregulation of certain aspects of the Registrant's business at both the
state and Federal  levels;  future market  prices for fuel and purchased  power,
electricity,  and  natural  gas,  including  the use of  financial  instruments;
average rates for electricity in the Midwest;  business and economic conditions;
interest rates;  weather  conditions;  fuel prices and availability;  generation
plant performance;  the impact of current environmental regulations on utilities
and generating  companies and the expectation  that more stringent  requirements
will be introduced over time, which could potentially have a negative  financial
effect; monetary and fiscal policies;  future wages and employee benefits costs;
and legal and administrative proceedings.

                                      -6-


<PAGE>


INFORMATION REGARDING EXECUTIVE OFFICERS REQUIRED BY ITEM 401(b) OF
REGULATION S-K:

                       Age At                                 Date First Elected
         Name         12/31/99  Present Position                 or Appointed

Charles W. Mueller        61    President,                          7/1/93
                                Chief Executive Officer             1/1/94
                                and Director                       6/11/93
Donald E. Brandt          45    Senior Vice President               7/1/88
                                and Director                       4/28/98
Daniel F. Cole            46    Senior Vice President              7/12/99
Thomas F. Voss            52    Senior Vice President               6/1/99
Warner L. Baxter          38    Vice President,                     5/1/98
                                Controller and                      8/1/96
                                Director                           4/22/99
William J. Carr           62    Vice President                     10/1/88
Michael J. Montana        53    Vice President                      7/1/88
Charles D. Naslund        47    Vice President                      2/1/99
Garry L. Randolph         51    Vice President                      3/1/91
William C. Shores         61    Vice President                      7/1/88
Steven R. Sullivan        39    Vice President, General Counsel     7/1/98
                                and Secretary                       9/1/98
Jerre E. Birdsong         45    Treasurer                           7/1/93

     All officers  are elected or  appointed  annually by the Board of Directors
following the election of such Board at the annual meeting of stockholders  held
in April.  Except for  Messrs.  Baxter  and  Sullivan,  each of the  above-named
executive  officers has been employed by the Registrant for more than five years
in executive or  management  positions.  Mr. Baxter was  previously  employed by
PricewaterhouseCoopers  LLP. Mr.  Sullivan was  previously  employed by Anheuser
Busch Companies, Inc.

                                     PART II
ITEM 5.  MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS.

     There is no market for the  Registrant's  Common Stock since all shares are
owned by its parent, Ameren.


ITEM 6.  SELECTED FINANCIAL DATA.
<TABLE>
<CAPTION>
For the Years Ended
December 31 (In Thousands)              1999         1998         1997         1996         1995
- -------------------------               ----         ----         ----         ----         ----
<S>                                 <C>          <C>          <C>          <C>          <C>
Operating revenues                  $2,527,166   $2,382,071   $2,287,333   $2,260,364   $2,242,364
Operating income                       443,268      428,183      448,827      428,314      441,896
Net income                             349,252      320,070      301,655      304,876      314,107
Preferred stock dividends                8,817        8,817        8,817       13,249       13,250
Net income after preferred
  stock dividends                      340,435      311,253      292,838      291,627      300,857
Common stock dividends                 328,674      259,599      259,395      256,331      250,714
As of December 31,
Total assets                        $7,043,562   $6,829,864   $6,802,285   $6,870,809   $6,754,469
Long-term debt                       1,882,601    1,674,311    1,846,482    1,798,671    1,763,613
Total common stockholder's equity    2,433,682    2,424,125    2,387,454    2,354,801    2,319,197

</TABLE>

                                      -7-

<PAGE>

ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
AND RESULTS OF OPERATIONS

OVERVIEW

Union Electric  Company  (AmerenUE or the  Registrant) is a subsidiary of Ameren
Corporation  (Ameren),  a holding  company  registered  under the Public Utility
Holding  Company Act of 1935  (PUHCA).  In December  1997,  AmerenUE  and CIPSCO
Incorporated  (CIPSCO)  combined to form  Ameren,  with  AmerenUE  and  CIPSCO's
subsidiaries,  Central  Illinois Public Service Company  (AmerenCIPS) and CIPSCO
Investment Company (CIC), becoming subsidiaries of Ameren (the Merger).

RESULTS OF OPERATIONS

Earnings
Earnings for 1999,  1998,  and 1997 were $340 million,  $311  million,  and $293
million,  respectively.  Earnings fluctuated due to many conditions,  primarily:
sales growth, weather variations,  credits to electric customers,  electric rate
reductions, gas rate increases, competitive market forces, fluctuating operating
costs  (including  Callaway  Nuclear Plant  refueling  outages),  merger-related
expenses,  changes in interest expense,  changes in income and property taxes, a
targeted employee separation plan and an extraordinary charge.

In 1998, the Registrant recorded a nonrecurring charge to earnings in connection
with a  targeted  separation  plan it offered to  employees  in July 1998.  That
charge reduced earnings $11 million,  net of income taxes (see Note 4 - Targeted
Separation Plan under Notes to Financial Statements for further information). In
addition,  the Registrant  recorded an  extraordinary  charge to earnings in the
fourth quarter of 1997 for the write-off of generation-related regulatory assets
and  liabilities of the  Registrant's  Illinois  retail  electric  business as a
result of electric  industry  restructuring  legislation  enacted in Illinois in
December 1997. The write-off  reduced earnings $27 million,  net of income taxes
(see Note 2 - Regulatory Matters under Notes to Financial Statements for further
information.)

The significant  items affecting  revenues,  expenses and earnings for the years
ended December 31, 1999, 1998, and 1997 are detailed in the following pages.

Electric Operations
Electric Revenues                     Variations from Prior Year
- ----------------------------------------------------------------------
(Millions of Dollars)                 1999       1998      1997
- ----------------------------------------------------------------------
Rate variations                     $  (9)     $  (8)      $--
Credit to customers                     7        (24)       28
Effect of abnormal weather            (37)        48         4
Growth and other                       47         48         1
Interchange sales                     136         38        (5)
- ----------------------------------------------------------------------
                                    $ 144      $ 102    $   28
- ----------------------------------------------------------------------

Electric revenues for 1999 increased $144 million,  compared to 1998,  primarily
due to a 5% increase in total  kilowatthour  sales.  This increase was primarily
driven by a 75% increase in interchange  sales, due to strong marketing efforts.
Also  contributing  to the  revenue  increase  was a  decrease  in the credit to
Missouri  electric  customers  (see Note 2 - Regulatory  Matters  under Notes to
Financial  Statements  for  further  information).  Partially  offsetting  these
increases,  weather-sensitive  residential  sales decreased 2%, commercial sales
remained flat, while industrial sales decreased 2%.

Electric  revenues for 1998 increased $102 million,  compared to 1997.  Revenues
increased  primarily  due  to  higher  sales  to  retail  customers  within  the
Registrant's service territory, as a result of warm summer weather and growth in
the service area, and increased interchange revenues, primarily due to favorable
market conditions.  These increases were partially offset by a rate decrease and
an increase in estimated credits to Missouri electric customers, as well as a 5%
rate decrease for Illinois electric  customers (see Note 2 - Regulatory  Matters
under Notes to Financial Statements for further information).  Weather-sensitive
residential  and  commercial  sales  increased  6% and 4%,  respectively,  while
industrial  sales  grew 1%.  Interchange  sales  increased  7%,  primarily  from
AmerenCIPS.

                                      -8-

<PAGE>

The increase in 1997 electric  revenues was  primarily  due to a lower  Missouri
customer  credit  recorded  in  1997.  Residential  sales  remained  flat  while
interchange  sales decreased 5%.  Commercial and industrial sales were 1% and 3%
higher, respectively.

Fuel and Purchased Power                          Variations from Prior Year
- --------------------------------------------------------------------------------
(Millions of Dollars)                            1999       1998       1997
- --------------------------------------------------------------------------------
Fuel:
    Generation                                 $  (2)     $  24     $  17
     Price                                        (2)       (10)      (15)
     Generation efficiencies and other            (2)         5        (1)
Purchased power                                  132         11       (14)
- --------------------------------------------------------------------------------
                                               $ 126       $ 30    $  (13)
- --------------------------------------------------------------------------------

The $126 million  increase in fuel and purchased power costs for 1999,  compared
to 1998, was primarily driven by increased power purchases resulting from higher
sales volume.

The $30 million increase in fuel and purchased power costs for 1998, compared to
1997, was primarily  driven by increased  generation due to higher sales volume,
joint dispatch,  and higher  purchased power prices,  partially  offset by lower
fuel prices.  Upon  consummation  of the Merger,  AmerenUE and AmerenCIPS  began
jointly  dispatching  generation,  therefore allowing Ameren to utilize the most
cost efficient  plants of both operating  companies to serve customers in either
service  territory.  Fuel and purchased  power costs decreased in 1997 primarily
due to reduced purchased power costs, resulting from relatively flat native load
sales coupled with greater generation, as well as lower fuel prices.

Gas Operations
Gas revenues in 1998 decreased $7 million compared to 1997,  primarily due to an
8% decline  in retail  sales  resulting  from mild  weather  and lower gas costs
reflected in the Company's  purchased gas adjustment  clause.  Weather-sensitive
residential  and  commercial  sales  decreased  10%  and 6%,  respectively,  and
industrial  sales declined 2%. These decreases were partially offset by benefits
realized  from an  annual  $12  million  Missouri  gas rate  increase  effective
February  1998  (see  Note 2 -  Regulatory  Matters  under  Notes  to  Financial
Statements for further information).

Gas costs in 1999 increased $5 million compared to 1998, primarily due to higher
gas prices partially offset by lower total sales. Gas costs in 1998 declined $14
million compared to 1997, primarily due to lower sales and lower gas prices.

Other Operating Expenses
Other  operating  expense  variations in 1997 through 1999  reflected  recurring
factors such as growth,  inflation,  labor and benefit increases, in addition to
the  capitalization  of certain costs as a result of a Missouri  Public  Service
Commission (MoPSC) Order and a charge for the targeted separation plan (TSP), as
discussed below.

In 1998,  Ameren  announced  plans  to  reduce  its  other  operating  expenses,
including plans to eliminate  approximately  400 employee  positions by mid-1999
through a hiring  freeze  and the TSP.  During the third  quarter  of 1998,  the
Registrant  recorded a nonrecurring,  pretax charge of $18 million  representing
its share of costs  incurred to  implement  the TSP.  The  elimination  of these
positions,  exclusive  of the  nonrecurring  charge,  reduced  the  Registrant's
operating  expenses  approximately  $11 million in 1998, and  approximately  $15
million in 1999, and is expected to reduce the Registrant's  operating  expenses
by approximately  $14 million to $18 million each year thereafter.  See Note 4 -
Targeted  Separation  Plan  under  Notes to  Financial  Statements  for  further
information.

The $28 million decrease in other operating expenses in 1999,  compared to 1998,
was primarily due to the 1998 charge for the TSP and related reduced  workforce,
decreases  in  injuries  and  damages  expense  (due to claims  experience)  and
information  system-related  costs  and  the  capitalization  of  certain  costs
(including  computer  software  costs) that had previously been expensed for the
Registrant's Missouri electric operations (see Note 2 - Regulatory Matters under
Notes to Financial Statements for further information).

The $57 million increase in other operating expenses in 1998,  compared to 1997,
was  primarily  due to the  charge for the TSP and  increases  in  injuries  and
damages expense and information  system-related  costs. In 1997, other operating
expense   increased  $26  million   primarily   due  to  increased   information
system-related expenses.

                                      -9-

<PAGE>

Maintenance  expenses increased $25 million in 1999,  compared to 1998 primarily
due to  increased  power  plant  maintenance  and tree  trimming  activity.  The
expenses  incurred  for the 35-day  refueling  outage in the fall of 1999 at the
Callaway  Nuclear  Plant were  comparable  to those for the 31-day  spring  1998
refueling   outage.  No  refueling  outage  is  scheduled  for  2000.  In  1998,
maintenance  expenses increased $5 million due to the scheduled spring refueling
outage at the Callaway Nuclear Plant;  partially offset by less scheduled fossil
plant maintenance. In 1997, maintenance expenses decreased $6 million, primarily
a result of reduced  Callaway  Plant  expenses due to the absence of a refueling
outage in 1997, offset in part by increased scheduled fossil plant maintenance.

Depreciation  and  amortization  expense  increased  $12  million in 1998 and $7
million in 1997, due to increased  depreciable  property and amortization of the
Missouri  portion of  merger-related  costs which were  recorded as a regulatory
asset upon Merger  close under the  conditions  of the Missouri  Public  Service
Commission (MoPSC) order approving the Merger.

Taxes
Income tax expense from  operations  increased $13 million in 1999,  compared to
1998, due to higher pretax income.  Income tax expense from operations increased
$25 million in 1998,  compared to 1997, due to higher pretax income and a higher
effective tax rate.  Income tax expense from operations  decreased $5 million in
1997 primarily due to a lower effective tax rate.

Other tax expense decreased $8 million in 1999, compared to 1998,  primarily due
to a decrease  in gross  receipts  taxes  related to the  Registrant's  Illinois
jurisdiction.  This decrease is the result of the  restructuring of the Illinois
public  utility  tax  whereby  gross  receipts  taxes are no longer  recorded as
electric revenues and gross receipts tax expense.

Other Income and Deductions
Miscellaneous,  net  increased  $4 million for 1998,  compared  to 1997,  due to
increased interest income and gains on the sale of property.  Miscellaneous, net
increased $12 million for 1997,  primarily due to the  capitalization of certain
merger-related costs in 1997.

Interest
Interest expense decreased $10 million in 1999, compared to 1998,  primarily due
to lower  debt  outstanding  during the year and a  decrease  in other  interest
expense.  Interest expense decreased $9 million for 1998,  compared to 1997, due
to lower  interest  rates and a decrease  in other  interest  expense.  Interest
expense  increased $6 million for 1997 primarily due to higher debt  outstanding
during the year at higher interest rates.

Balance Sheet
The $12 million  decrease in trade accounts  receivable and unbilled  revenue at
December  31,  1999,  compared to 1998,  was due to lower sales and  revenues in
November and early  December  1999,  compared to the  comparable  time period in
1998.  The $166 million  increase in  intercompany  notes  receivable was due to
funds  invested  in  a  regulated  money  pool  (see  Note  3  -  Related  Party
Transactions under Notes to Financial Statements for further information.)

The $54 million  increase in other current  liabilities was primarily due to the
timing of credit payments to electric customers in the Registrant's Missouri and
Illinois  jurisdictions,  as well as an increase in a liability for an estimated
rate reduction for Missouri electric customers  retroactive to September 1, 1998
(see Note 2 - Regulatory Matters under Notes to Financial Statements for further
information).  The  remaining  variance  is the  result of the timing of various
payments to suppliers.

The $37 million increase in other deferred credits and liabilities was primarily
due to Callaway Plant decommissioning costs.

LIQUIDITY AND CAPITAL RESOURCES

Cash provided by operating activities totaled $725 million for 1999, compared to
$651 million and $602 million in 1998 and 1997, respectively.

Cash flows used in investing activities totaled $419 million,  $231 million, and
$284 million for the years ended December 31, 1999, 1998 and 1997, respectively.
Expenditures in 1999 for constructing new or to improve existing  facilities and
purchasing  rail cars were $246  million.  In  addition,  the Company  spent $22
million to acquire nuclear fuel.

                                      -10-

<PAGE>

Capital  expenditures  are expected to approximate $297 million in 2000. For the
five-year  period  2000-2004,  construction  expenditures  are estimated at $1.6
billion.  This estimate  includes capital  expenditures that will be incurred by
the  Registrant  to meet new air  quality  standards  for ozone and  particulate
matter, as discussed below.

Title IV of the Clean Air Act  Amendments  of 1990  requires the  Registrant  to
significantly  reduce total annual sulfur dioxide (SO2) and nitrogen oxide (NOx)
emissions by the year 2000.  By switching to low-sulfur  coal,  early banking of
emission credits and installing  advanced NOx reduction  combustion  technology,
the Registrant is meeting these requirements.

In July 1997,  the United States  Environmental  Protection  Agency (EPA) issued
regulations  revising the National  Ambient Air Quality  Standards for ozone and
particulate  matter.  In May 1999, the U.S. Court of Appeals for the District of
Columbia  remanded  the  regulations  back  to the EPA  for  review.  Litigation
regarding  appeals of these  regulations is ongoing.  New ambient  standards may
result in  significant  additional  reductions in SO2 and NOx emissions from the
Registrant's  power plants by 2007.  At this time,  the  Registrant is unable to
predict the ultimate impact of these revised air quality standards on its future
financial condition, results of operations or liquidity.

In an attempt to lower ozone levels across the eastern  United  States,  the EPA
issued  the  implementation  of  regulations  in  September  1998 to reduce  NOx
emissions  from  coal-fired  boilers and other  sources in 22 states,  including
Missouri  (where all of the  Registrant's  coal-fired  power  plant  boilers are
located).  The proposed  regulations mandate a 75% reduction from 1990 levels by
the year 2003 and require  states to develop  plans to reduce NOx  emissions  to
help  alleviate  ozone  problem  areas.  The NOx  emissions  reductions  already
achieved on several of the  Registrant's  coal-fired  power  plants will help to
reduce the costs of  compliance  with these  regulations.  However,  preliminary
analysis  of  the  regulations   indicate  that  selective  catalytic  reduction
technology may be required for some of the Registrant's  units, as well as other
additional controls.

In  March  2000,  the  U.S.  Court  of  Appeals  for the  District  of  Columbia
substantially  upheld the proposed NOx regulations but remanded portions of them
to the EPA for further consideration. The implementation date of the regulations
is uncertain and further legal challenge is possible. Assuming an implementation
date of 2003, the  Registrant  currently  estimates that its additional  capital
expenditures  to comply  with the final NOx  regulations  could  range from $125
million to $150 million.  Associated  operations  and  maintenance  expenditures
could  increase  $5 million  to $8  million  annually,  beginning  in 2003.  The
Registrant is exploring  alternatives  to comply with these new  regulations  in
order to  minimize,  to the extent  possible,  its capital  costs and  operating
expenses. The Registrant is unable to predict the outcome of the litigation, the
regulation implementation date and the ultimate impact of these standards on its
future financial condition, results of operations or liquidity.

In November  1998,  the United  States signed an agreement  with numerous  other
countries (the Kyoto  Protocol)  containing  certain  environmental  provisions,
which would require  decreases in  greenhouse  gases in an effort to address the
"global  warming" issue.  The Kyoto Protocol has not been ratified by the United
States  Senate.  Implementation  of the Kyoto Protocol in its present form would
likely  result  in  significantly   higher  capital  costs  and  operations  and
maintenance  expenses by the Registrant.  At this time, the Registrant is unable
to determine the impact of these proposals on the Registrant's  future financial
condition, results of operations or liquidity.

See Note 13 - Callaway  Nuclear Plant under Notes to Financial  Statements for a
discussion of Callaway Plant decommissioning costs.

Cash flows used in financing  activities were $236 million for 1999, compared to
$376 million and $320 million for 1998 and 1997, respectively.  The Registrant's
principal  financing  activities  during 1999  included the  redemption  of $100
million of long-term  debt, the issuance of $152 million of long-term  debt, and
the payment of dividends.

The Registrant  plans to continue  utilizing  short-term  debt to support normal
operations and other temporary requirements. The Registrant is authorized by the
Securities and Exchange Commission (SEC) under PUHCA to have up to $1 billion of
short-term  unsecured debt instruments  outstanding at any one time.  Short-term
borrowings  consist of bank loans  (maturities  generally on an overnight basis)
and commercial  paper  (maturities  generally within 10 to 45 days). At December
31, 1999, the Registrant  had committed  bank lines of credit  aggregating  $150
million,  all of which  was  unused  and  available  at such  date,  which  make
available  interim  financing at various rates of interest  based on LIBOR,  the
bank  certificate  of  deposit  rate or other  options.  The lines of credit are
renewable  annually at various  dates  throughout  the year.  At  year-end,  the
Registrant had no outstanding short-term borrowings.

The  Registrant  also has a bank credit  agreement  due 2002,  which permits the
borrowing of up to $300 million on a long-term  basis,  all of which was unused,
and $148 million was available at December 31, 1999. In addition, the Registrant
has the  ability  to borrow up to  approximately  $530  million  from  Ameren or
AmerenCIPS  through a

                                      -11-

<PAGE>

regulated  money pool  agreement.  The regulated  money pool was  established to
coordinate  and  provide  for  certain   short-term  cash  and  working  capital
requirements and is administered by Ameren Services Company,  another subsidiary
of Ameren.  Interest is calculated at varying rates of interest depending on the
composition  of internal  and external  funds in the  regulated  money pool.  At
December 31, 1999, the Registrant had no intercompany borrowings outstanding and
$402 million available through the regulated money pool. See Note 8 - Short-Term
Borrowings under Notes to Financial Statements for further discussion.

Additionally,  the  Registrant  has a  lease  agreement  that  provides  for the
financing of nuclear fuel. At December 31, 1999,  the maximum  amount that could
be financed  under the agreement  was $120  million.  Cash used in financing for
1999 included issuances under the lease for nuclear fuel of $65 million,  offset
in part by $15 million of  redemptions.  At December 31, 1999,  $116 million was
financed  under  the  lease.  See Note 6 - Nuclear  Fuel  Lease  under  Notes to
Financial Statements for further information.

The Registrant,  in the ordinary course of business,  explores  opportunities to
reduce its costs in order to remain competitive in the marketplace.  Areas where
the Registrant  focuses its review include,  but are not limited to, labor costs
and fuel supply costs.  In the labor area, the  Registrant has recently  reached
agreements with some of the Registrant's  collective bargaining units which will
permit it to manage its labor costs and practices effectively in the future (see
Note 12 - Commitments and Contingencies under Notes to Financial  Statements for
further  discussion.)  The Registrant also explores  alternatives to effectively
manage the size of its workforce.  These  alternatives  include utilizing hiring
freezes,  outsourcing and offering  employee  separation  packages.  In the fuel
supply area,  the Registrant  explores  alternatives  to effectively  manage its
overall fuel costs. These alternatives include diversifying fuel sources for use
at the Registrant's fossil power plants, as well as restructuring or terminating
existing contracts with suppliers.

Certain of these reduction  alternatives could result in additional  investments
being made at the Registrant's  power plants in order to utilize different types
of coal, or could require nonrecurring  payments of employee separation benefits
or  nonrecurring  payments to restructure  or terminate  existing fuel contracts
with a supplier.  Management  is unable to predict  which (if any),  and to what
extent,  these  alternatives  to  reduce  its  overall  cost  structure  will be
executed.  Management  is unable to determine the impact of these actions on the
Registrant's future financial position, results of operations or liquidity.

RATE MATTERS

See Note 2 -  Regulatory  Matters  under  Notes to  Financial  Statements  for a
discussion of rate matters.

ELECTRIC INDUSTRY RESTRUCTURING

Steps taken and being  considered  at the federal and state  levels  continue to
change the  structure  of the  electric  industry  and utility  regulation,  and
encourage increased competition.  At the federal level, the Energy Policy Act of
1992 reduced various  restrictions on the operation and ownership of independent
power  producers and gave the Federal Energy  Regulatory  Commission  (FERC) the
authority to order electric  utilities to provide  transmission  access to third
parties.

In April 1996,  the FERC issued  Order 888 and Order 889,  which are intended to
promote  competition  in  the  wholesale  electric  market.  The  FERC  requires
transmission-owning  public  utilities,  such  as  the  Registrant,  to  provide
transmission  access and service to others in a manner similar and comparable to
that which the utilities have by virtue of ownership.  Order 888 requires that a
single tariff be used by the utility in providing  transmission  service.  Order
888  also  provides  for  the  recovery  of  strandable  costs,   under  certain
conditions, related to the wholesale business.

Order 889 established the standards of conduct and information requirements that
transmission owners must adhere to in doing business under the open access rule.
Under Order 889, utilities must obtain transmission service for their own use in
the same manner their  customers will obtain  service,  thus  mitigating  market
power through control of transmission facilities.  In addition, under Order 889,
utilities must separate their merchant  function  (buying and selling  wholesale
power) from their transmission and reliability functions.

The  Registrant  believes  that  Order 888 and Order  889,  which  relate to its
wholesale  business,  will not have a material  adverse  effect on its financial
condition, results of operations or liquidity.

In 1998, the  Registrant  joined a group of companies that support the formation
of the Midwest  Independent System Operator (Midwest ISO). An ISO operates,  but
does not own, electric transmission systems and maintains system

                                      -12-

<PAGE>

reliability and security,  while alleviating  pricing issues associated with the
"pancaking" of rates.  The Midwest ISO would be regulated by the FERC.  Thirteen
transmission-owning  utilities  have joined the  Midwest ISO as of December  31,
1999.  The FERC  conditionally  approved  the  formation  of the  Midwest ISO in
September  1998, and it is expected to be operational  during the year 2001. The
MoPSC and the Illinois Commerce  Commission (ICC) have authorized the Registrant
to join the Midwest ISO and to transfer control of its  transmission  facilities
to the Midwest  ISO.  The Midwest ISO covers 14 states,  represents  portions of
60,000  miles of  transmission  line and  controls  $8 billion  of  assets.  The
Registrant  believes  that  the  operation  of the  Midwest  ISO will not have a
material  adverse  effect on its financial  condition,  results of operations or
liquidity.

In December 1999,  the FERC issued Order 2000 relating to Regional  Transmission
Organizations  (RTOs) that would meet certain  characteristics  such as size and
independence.  Order 2000  calls on all  transmission  owners to join  RTOs.  In
particular,  all public  utilities  that own,  operate,  or  control  interstate
transmission  facilities must file with the FERC by October 15, 2000, a proposal
for an RTO, or  alternatively a description of efforts by the utility to join an
RTO.  The  Registrant  expects  that its  participation  in the Midwest ISO will
satisfy the requirements of Order 2000.

Illinois
Certain states are considering  proposals or have adopted  legislation that will
promote  competition  at the retail  level.  In December  1997,  the Governor of
Illinois signed the Electric Service Customer Choice and Rate Relief Law of 1997
(the Illinois Law)  providing for electric  utility  restructuring  in Illinois,
where approximately 6% of the Registrant's retail electric revenues are derived.
This  legislation  introduces  competition into the supply of electric energy at
retail in Illinois.

Major  provisions  of the  Illinois Law include the  phasing-in  through 2002 of
retail direct access, which allows customers to choose their electric generation
suppliers.  The phase-in of retail direct access began on October 1, 1999,  with
large  commercial and industrial  customers  principally  comprising the initial
group.   The  customers  in  this  group  represent   approximately  6%  of  the
Registrant's  total sales.  As of December 31, 1999, the impact of retail direct
access  on the  Registrant's  financial  condition,  results  of  operations  or
liquidity was immaterial.  Retail direct access will be offered to the remaining
commercial  and  industrial  customers on December 31, 2000,  and to residential
customers on May 1, 2002.

In  addition,  the Illinois  Law  included a 5% rate  decrease  for  residential
customers  that became  effective in August  1998.  This rate  decrease  reduced
electric  revenues $1 million in 1999 compared to 1998 and is expected to impact
electric  revenues by  approximately  $3 million  annually,  based on  estimated
levels of sales and assuming normal weather conditions. (See Note 2 - Regulatory
Matters under Notes to Financial  Statements for further  information.) In 1998,
the Registrant eliminated its Uniform Fuel Adjustment Clause (FAC) as allowed by
the Illinois Law, which benefited  shareholders in 1998 and 1999 and is expected
to  benefit  shareholders  in the future  (see Note 1 - Summary  of  Significant
Accounting   Policies   under  Notes  to   Financial   Statements   for  further
information).  The Illinois Law contains a provision  allowing for the potential
recovery of a portion of strandable costs,  which represent costs that would not
be  recoverable  in a  restructured  environment,  through a  transition  charge
collected from customers who choose an alternate electric supplier. In addition,
the Illinois Law contains a provision requiring a portion of excess earnings (as
defined  under the Illinois  Law) for the years 1998 through 2004 to be refunded
to customers.

In  December  1997,  after  evaluating  the  impact  of the  Illinois  Law,  the
Registrant determined that it was necessary to write-off the  generation-related
regulatory assets and liabilities of its Illinois retail electric business. This
extraordinary charge reduced 1997 earnings $27 million, net of income taxes. The
Registrant has also concluded that its remaining net  generation-related  assets
are not impaired for financial  reporting  purposes and that no plant writedowns
are  necessary  at this time.  See Note 2 -  Regulatory  Matters  under Notes to
Financial Statements for further information.

Missouri
In  Missouri,  where  approximately  94% of  the  Registrant's  retail  electric
revenues are derived, a task force appointed by the MoPSC investigated  electric
industry  restructuring and competition.  In 1998 the task force issued a report
to the  MoPSC  that  addressed  many of the  restructuring  issues,  but did not
provide a specific  recommendation  or approach to restructure the industry.  In
addition,  in 1998,  the MoPSC staff  issued a proposed  plan for  restructuring
Missouri's  electric industry.  The staff's plan addressed a number of issues of
concern if the industry is restructured in Missouri. It also included a proposal
for less than full recovery of strandable  costs.  The staff's plan has not been
addressed by the MoPSC.  A joint  committee of the Missouri  legislature is also
conducting hearings on these issues. Several restructuring bills were introduced
by the  Missouri  legislature  in 1999 and  2000.  The  Registrant  is unable to
predict the timing or ultimate outcome of electric industry restructuring in the
state of Missouri.

                                      -13-

<PAGE>

Summary
In  summary,  the  potential  negative  consequences  associated  with  electric
industry restructuring could be significant and could include the impairment and
writedown  of  certain  assets,  including   generation-related  plant  and  net
regulatory assets, lower revenues, reduced profit margins and increased costs of
capital and  operations  expenses.  The  Registrant is actively  taking steps to
mitigate these potential negative consequences. Most importantly, the Registrant
will continue to focus on cost control to ensure that it maintains a competitive
cost structure.  In Missouri,  the Registrant is actively  involved in all major
deliberations  taking place surrounding  electric  industry  restructuring in an
effort to ensure that  restructuring  legislation,  if any,  contains an orderly
transition and is equitable to the Registrant's shareholders.  The Registrant is
also actively involved in shaping the policies of the Midwest ISO to protect its
shareholders'  interests.  At this time, the Registrant is unable to predict the
ultimate impact of electric  industry  restructuring on the Registrant's  future
financial condition, results of operations or liquidity.

YEAR 2000 ISSUE

The Year  2000  Issue  relates  to how  dates are  stored  and used in  computer
systems,  applications,  and  embedded  systems.  As  the  century  date  change
occurred,  certain  date-sensitive systems had to recognize the year as 2000 and
not as 1900.  This  inability to recognize  and properly  treat the year as 2000
could have caused these systems to process  critical  financial and  operational
information  incorrectly.  Management  implemented  a Year  2000  plan  covering
Ameren,  including  AmerenUE,  and briefed Ameren's Board of Directors about the
Year  2000  Issue  and  how  it  might  have  affected  the  Registrant.  Ameren
encountered  no  significant  problems  associated  with the Year 2000  Issue at
year-end.  In addressing  the Year 2000 Issue,  Ameren  incurred  internal labor
costs as well as external  consulting  and other expenses to prepare for the new
century.  As of December 31, 1999, Ameren had expended  approximately $8 million
in external costs  (consulting  fees and related costs).  The impact of the Year
2000 Issue on the  Registrant's  financial  condition,  results of operations or
liquidity was immaterial. Ameren will continue to monitor date-sensitive systems
as certain key dates occur throughout the year.

CONTINGENCIES

See Note 2 - Regulatory  Matters,  Note 12 - Commitments and  Contingencies  and
Note 13 -  Callaway  Nuclear  Plant  under  Notes to  Financial  Statements  for
material issues existing at December 31, 1999.

MARKET RISK RELATED TO FINANCIAL INSTRUMENTS AND COMMODITY INSTRUMENTS

Market risk  represents the risk of changes in value of a financial  instrument,
derivative or  non-derivative,  caused by fluctuations in market variables (e.g.
interest rates, equity prices, commodity prices, etc.). The following discussion
of  the  Registrant's  risk  management  activities  includes  "forward-looking"
statements  that involve risks and  uncertainties.  Actual  results could differ
materially  from  those  projected  in  the  "forward-looking"  statements.  The
Registrant handles market risks in accordance with established  policies,  which
may include entering into various derivative transactions.  In the normal course
of business,  the Registrant also faces risks that are either  non-financial  or
non-quantifiable.  Such risks principally include business,  legal, operational,
and credit risk and are not represented in the following analysis.

Interest Rate Risk
The  Registrant  is exposed to market risk  through  changes in  interest  rates
through its  issuance  of both  long-term  and  short-term  variable-rate  debt,
fixed-rate debt and commercial  paper. The Registrant  manages its interest rate
exposure by  controlling  the amount of these  instruments  it holds  within its
total  capitalization  portfolio and by monitoring the effects of market changes
in interest rates.

If interest rates  increase one  percentage  point in 2000, as compared to 1999,
the  Registrant's  interest  expense would increase by approximately $6 million,
and net income would decrease by approximately $4 million.  This amount has been
determined using the assumptions that the Registrant's outstanding variable-rate
debt and commercial paper, as of December 31, 1999,  continued to be outstanding
throughout  2000,  and that the  average  interest  rates for these  instruments
increased  one  percentage  point over 1999.  The model  does not  consider  the
effects of the reduced level of potential  overall economic  activity that would
exist in such an environment.  In the event of a significant  change in interest
rates,  management would likely take actions to further mitigate its exposure to
this market risk.  However,  due to the uncertainty of the specific actions that
would be taken and their possible effects,  the sensitivity  analysis assumes no
change in the Registrant's financial structure.

                                      -14-

<PAGE>

Commodity Price Risk
The  Registrant is exposed to changes in market prices for natural gas, fuel and
electricity.  With regard to its natural gas utility business,  the Registrant's
exposure to changing  market prices is in large part  mitigated by the fact that
the Registrant has a Purchased Gas Adjustment  Clause (PGA) in place in both its
Missouri and Illinois jurisdictions. The PGA allows the Registrant to pass on to
its customers its prudently  incurred costs of natural gas. With approval of the
MoPSC,  the Registrant  participated in an  experimental  program to control the
volatility of gas prices paid by its Missouri  customers in the 1998-1999 winter
months through the purchase of financial instruments.  This program concluded in
April 1999.

Since  the  Registrant  does not  have a  provision  similar  to the PGA for its
electric operations, the Registrant has entered into several long-term contracts
with various  suppliers to purchase coal and nuclear fuel to manage its exposure
to fuel prices.  (See Note 12 -  Commitments  and  Contingencies  under Notes to
Financial Statements for further  information).  With regard to the Registrant's
exposure to  commodity  price risk for  purchased  power and excess  electricity
sales, Ameren has established a subsidiary,  AmerenEnergy, Inc., (AmerenEnergy),
whose primary  responsibility  includes  managing  market risks  associated with
changing  market  prices  for  electricity  purchased  and sold on behalf of the
Registrant.

AmerenEnergy  utilizes  several  techniques  to  mitigate  its  market  risk for
electricity,  including utilizing derivative financial instruments. A derivative
is a contract  whose  value is  dependent  on or derived  from the value of some
underlying  asset. The derivative  financial  instruments  that  AmerenEnergy is
allowed to utilize (which include  forward  contracts,  futures  contracts,  and
option  contracts)  are  dictated by a risk  management  policy,  which has been
reviewed with the Auditing Committee of Ameren's Board of Directors.  Compliance
with the risk  management  policy  is the  responsibility  of a risk  management
steering  committee,  consisting  of Ameren  officers  and an  independent  risk
management officer at AmerenEnergy.

As of December  31, 1999,  the fair value of  derivative  financial  instruments
exposed to commodity  price risk was immaterial.  AmerenEnergy's  primary use of
derivatives  has been limited to  transactions  that are either  risk-neutral or
that reduce price risk exposure of the Registrant.

Equity Price Risk
The  Registrant  maintains  trust funds,  as required by the Nuclear  Regulatory
Commission  and  Missouri  and Illinois  state laws,  to fund  certain  costs of
nuclear  decommissioning  (see Note 13 - Callaway  Nuclear  Plant under Notes to
Financial  Statements for further  information).  As of December 31, 1999, these
funds  were  invested  primarily  in  domestic  equity  securities,  fixed-rate,
fixed-income  securities,  and cash  and  cash  equivalents.  By  maintaining  a
portfolio that includes long-term equity investments,  the Registrant is seeking
to maximize  the returns to be utilized to fund nuclear  decommissioning  costs.
However,  the equity  securities  included  in the  Registrant's  portfolio  are
exposed  to  price   fluctuations  in  equity   markets,   and  the  fixed-rate,
fixed-income securities are exposed to changes in interest rates. The Registrant
actively   monitors  its  portfolio  by  benchmarking  the  performance  of  its
investments  against  certain  indices  and  by  maintaining,  and  periodically
reviewing, established target allocation percentages of the assets of its trusts
to various investment options. The Registrant's  exposure to equity price market
risk is in large part mitigated due to the fact that the Registrant is currently
allowed to recover its decommissioning costs in its rates.

ACCOUNTING MATTERS

In June 1998, the Financial  Accounting  Standards Board (FASB) issued Statement
of Financial  Accounting  Standards  (SFAS) No. 133,  "Accounting for Derivative
Instruments  and  Hedging  Activities."  SFAS  133  establishes  accounting  and
reporting  standards for derivative  instruments,  including certain  derivative
instruments embedded in other contracts, and for hedging activities and requires
recognition  of all  derivatives  as either assets or liabilities on the balance
sheet  measured at fair value.  The  intended use of the  derivatives  and their
designation  as  either a fair  value  hedge,  a cash flow  hedge,  or a foreign
currency hedge will determine when the gains or losses on the derivatives are to
be reported in earnings and when they are to be reported as a component of other
comprehensive  income.  In June 1999, the FASB issued SFAS No. 137,  "Accounting
for Derivative  Instruments  and Hedging  Activities--Deferral  of the Effective
Date of FASB Statement No. 133," which delayed the effective date of SFAS 133 to
all fiscal quarters of all fiscal years,  beginning after June 15, 2000. Earlier
application is still encouraged. The Registrant expects to adopt SFAS 133 in the
first quarter of 2001.

The  Registrant is currently  evaluating the impact of SFAS 133 on its financial
position and results of operations upon adoption.  The  Registrant's  evaluation
includes  reviewing existing  derivative  instruments and contracts to determine
the  appropriate  accounting  for these  items  under  SFAS 133.  At this  time,
management believes that adoption of SFAS 133 will not have a material impact on
the Registrant's financial position or results of operations

                                      -15-

<PAGE>

upon adoption based on the derivative  instruments  which existed as of December
31, 1999. However, changing market conditions, the volume of future transactions
which may fall within the scope of SFAS 133, and  potential  amendments  to SFAS
133 could change management's  current  assessment.  As a result, SFAS 133 could
increase  the  volatility  of the  Registrant's  future  earnings  and  could be
material to the Registrant's  financial  position and results of operations upon
adoption.

EFFECTS OF INFLATION AND CHANGING PRICES

The Registrant's rates for retail electric and gas utility service are generally
regulated by the MoPSC and the ICC.  Non-retail  electric rates are regulated by
the FERC.

The current  replacement  cost of the Registrant's  utility plant  substantially
exceeds its recorded historical cost. Under existing regulatory  practice,  only
the historical cost of plant is recoverable  from customers.  As a result,  cash
flows  designed to provide  recovery of historical  costs  through  depreciation
might not be adequate to replace plants in future years. Regulatory practice has
been  modified for the  Registrant's  generation  portion of its business in its
Illinois  jurisdiction  and may be modified  in the future for the  Registrant's
Missouri  jurisdiction (see Note 2 - Regulatory Matters under Notes to Financial
Statements  for  further  information).   In  addition,  the  impact  on  common
stockholders  is mitigated to the extent  depreciable  property is financed with
debt that is repaid with dollars of less purchasing power.

In the Illinois retail  jurisdiction,  the cost of fuel for electric generation,
which was previously  reflected in billings to customers  through a Uniform Fuel
Adjustment  Clause, has been added to base rates as provided for in the Illinois
Law (see Note 2 - Regulatory  Matters  under Notes to Financial  Statements  for
further information). In the Missouri retail jurisdiction,  the cost of fuel for
electric  generation is reflected in base rates with no provision for changes to
be made through a fuel adjustment  clause. In Illinois and Missouri,  changes in
gas costs are generally reflected in billings to customers through Purchased Gas
Adjustment Clauses.

Inflation continues to be a factor affecting operations, earnings, stockholders'
equity and financial performance.

SAFE HARBOR STATEMENT

Statements  made in this report  which are not based on  historical  facts,  are
"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,
financial  performance  and the Year 2000 Issue.  In  connection  with the "Safe
Harbor" provisions of the Private Securities  Litigation Reform Act of 1995, the
Registrant is 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 subsequent securities filings,  could cause results to differ materially from
management expectations as suggested by such "forward-looking"  statements:  the
effects of regulatory actions;  changes in laws and other governmental  actions;
the impact on the Registrant of current regulations related to the phasing-in of
the opportunity  for some customers to choose  alternative  energy  suppliers in
Illinois; the effects of increased competition in the future due to, among other
things, deregulation of certain aspects of the Registrant's business at both the
state and Federal  levels;  future market  prices for fuel and purchased  power,
electricity,  and  natural  gas,  including  the use of  financial  instruments;
average rates for electricity in the Midwest;  business and economic conditions;
interest rates;  weather  conditions;  fuel prices and availability;  generation
plant performance;  the impact of current environmental regulations on utilities
and generating  companies and the expectation  that more stringent  requirements
will be introduced over time, which could potentially have a negative  financial
effect; monetary and fiscal policies;  future wages and employee benefits costs;
and legal and administrative proceedings.


ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

     Information  required to be reported by this item is included under "Market
Risk  Related  to  Financial   Instruments   and   Commodity   Instruments"   in
"Management's  Discussion  and Analysis of Financial  Conditions  and Results of
Operations" under Item 7 herein.

                                      -16-

<PAGE>







                        REPORT OF INDEPENDENT ACCOUNTANTS
                        ---------------------------------



To the Board of Directors and Shareholders
of Union Electric Company


In our opinion,  the financial  statements  listed in the index  appearing under
Item 14(a)(1) on Page 38 present fairly, in all material respects, the financial
position  of Union  Electric  Company at  December  31,  1999 and 1998,  and the
results of their  operations and their cash flows for each of the three years in
the period  ended  December  31,  1999 in  conformity  with  auditing  standards
generally  accepted in the United  States.  These  financial  statements are the
responsibility of the Company's management;  our responsibility is to express an
opinion on these  financial  statements  based on our audits.  We conducted  our
audits of these  statements in accordance with accounting  principles  generally
accepted in the United States,  which require that we plan and perform the audit
to obtain reasonable  assurance about whether the financial  statements are free
of material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and  disclosures in the financial  statements,  assessing
the accounting principles used and significant estimates made by management, and
evaluating the overall  financial  statement  presentation.  We believe that our
audits provide a reasonable basis for the opinion expressed above.






/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP
St. Louis, Missouri
February 2, 2000

                                      -17-

<PAGE>

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

                             UNION ELECTRIC COMPANY
                                  BALANCE SHEET
                      (Thousands of Dollars, Except Shares)

<TABLE>
<CAPTION>

                                                                  December 31, December 31,
ASSETS                                                                1999         1998
- ------                                                                ----         ----
<S>                                                               <C>          <C>
Property and plant, at original cost:
   Electric                                                       $9,210,122   $8,975,542
   Gas                                                               223,789      209,556
   Other                                                              37,156       35,994
                                                                  ----------   ----------
                                                                   9,471,067    9,221,092
   Less accumulated depreciation and amortization                  4,320,910    4,110,250
                                                                  ----------   ----------
                                                                   5,150,157    5,110,842
Construction work in progress:
   Nuclear fuel in process                                            88,830      108,294
   Other                                                              92,833      127,168
                                                                  ----------   ----------
         Total property and plant, net                             5,331,820    5,346,304
                                                                  ----------   ----------
Investments and other assets:
   Nuclear decommissioning trust fund                                186,760      161,877
   Other                                                              59,748       45,688
                                                                  ----------   ----------
         Total investments and other assets                          246,508      207,565
                                                                  ----------   ----------
Current assets:
   Cash and cash equivalents                                         117,308       47,337
   Accounts receivable - trade (less allowance for doubtful
         accounts of $5,308 and $6,678, respectively)                151,399      143,912
   Unbilled revenue                                                   78,213       97,361
   Other accounts and notes receivable                                19,803       55,502
   Intercompany notes receivable                                     165,700         --
   Materials and supplies, at average cost -
      Fossil fuel                                                     65,292       53,036
      Other                                                           90,921       91,831
   Other                                                              19,205       13,529
                                                                  ----------   ----------
         Total current assets                                        707,841      502,508
                                                                  ----------   ----------
Regulatory assets:
   Deferred income taxes                                             600,604      608,353
   Other                                                             156,789      165,134
                                                                  ----------   ----------
         Total regulatory assets                                     757,393      773,487
                                                                  ----------   ----------
TOTAL ASSETS                                                      $7,043,562   $6,829,864
                                                                  ==========   ==========

CAPITAL AND LIABILITIES
Capitalization:
   Common stock, $5 par value, authorized 150,000,000 shares -
     outstanding 102,123,834 shares                               $  510,619   $  510,619
   Other paid-in capital, principally premium on
     common stock                                                    701,896      701,896
   Retained earnings                                               1,221,167    1,211,610
                                                                  ----------   ----------
         Total common stockholder's equity                         2,433,682    2,424,125
   Preferred stock not subject to mandatory redemption (Note 7)      155,197      155,197
   Long-term debt (Note 9)                                         1,882,601    1,674,311
                                                                  ----------   ----------
         Total capitalization                                      4,471,480    4,253,633
                                                                  ----------   ----------
Current liabilities:
   Current maturity of long-term debt (Note 9)                        11,423      117,269
   Accounts and wages payable                                        234,845      232,963
   Accumulated deferred income taxes                                  48,139       45,061
   Taxes accrued                                                     119,699      100,714
   Other                                                             208,373      151,385
                                                                  ----------   ----------
         Total current liabilities                                   622,479      647,392
                                                                  ----------   ----------
Commitments and Contingencies (Notes 2, 12 and 13)
Accumulated deferred income taxes                                  1,248,721    1,254,372
Accumulated deferred investment tax credits                          138,665      144,175
Regulatory liability                                                 154,399      159,317
Other deferred credits and liabilities                               407,818      370,975
                                                                  ----------   ----------
TOTAL CAPITAL AND LIABILITIES                                     $7,043,562   $6,829,864
                                                                  ==========   ==========
</TABLE>

See Notes to Financial Statements.

                                      -18-

<PAGE>


                             UNION ELECTRIC COMPANY
                               STATEMENT OF INCOME
                             (Thousands of Dollars)

<TABLE>
<CAPTION>


                                                            December 31,   December 31,    December 31,
For the year ended                                              1999           1998           1997
                                                                ----           ----           ----

<S>                                                        <C>            <C>            <C>
OPERATING REVENUES:
   Electric                                                $ 2,435,017    $ 2,290,526    $ 2,188,571
   Gas                                                          91,978         91,175         98,259
   Other                                                           171            370            503
                                                           -----------    -----------    -----------
      Total operating revenues                               2,527,166      2,382,071      2,287,333

OPERATING EXPENSES:
   Operations
      Fuel and purchased power                                 656,534        530,449        499,995
      Gas                                                       54,469         49,496         63,453
      Other                                                    434,456        461,987        404,956
                                                           -----------    -----------    -----------
                                                             1,145,459      1,041,932        968,404
   Maintenance                                                 247,135        221,995        217,426
   Depreciation and amortization                               256,072        259,787        247,961
   Income taxes                                                230,691        217,385        192,766
   Other taxes                                                 204,541        212,789        211,949
                                                           -----------    -----------    -----------
      Total operating expenses                               2,083,898      1,953,888      1,838,506

Operating Income                                               443,268        428,183        448,827

OTHER INCOME AND DEDUCTIONS:
   Allowance for equity funds used during
      construction                                               7,170          4,985          4,461
   Miscellaneous, net                                           11,648         10,904          7,334
                                                           -----------    -----------    -----------
      Total other income and deductions                         18,818         15,889         11,795

Income Before Interest Charges                                 462,086        444,072        460,622

INTEREST CHARGES:
   Interest                                                    119,978        129,947        138,676
   Allowance for borrowed funds used during construction        (7,144)        (5,945)        (6,676)
                                                           -----------    -----------    -----------
      Net interest charges                                     112,834        124,002        132,000

Income Before Extraordinary Charge                             349,252        320,070        328,622
                                                           -----------    -----------    -----------

Extraordinary Charge, net of income taxes (Note 2)                --             --          (26,967)
                                                           -----------    -----------    -----------

NET INCOME                                                     349,252        320,070        301,655
                                                           -----------    -----------    -----------

Preferred Stock Dividends                                        8,817          8,817          8,817
                                                           -----------    -----------    -----------

NET INCOME AFTER PREFERRED
               STOCK DIVIDENDS                             $   340,435    $   311,253    $   292,838
                                                           ===========    ===========    ===========

</TABLE>

See Notes to Financial Statements.

                                      -19-

<PAGE>


                             UNION ELECTRIC COMPANY
                             STATEMENT OF CASH FLOWS
                             (Thousands of Dollars)

<TABLE>
<CAPTION>


                                                          December 31,        December 31,        December 31,
For the year ended                                            1999                1998                1997
                                                              ----                ----                ----

<S>                                                         <C>                 <C>                 <C>
Cash Flows From Operating:
   Income before extraordinary charge                       $349,252            $320,070            $328,622
   Adjustments to reconcile net income to net cash
  provided by operating activities:
        Depreciation and amortization                        246,292             250,323             238,846
        Amortization of nuclear fuel                          36,068              36,855              37,126
        Allowance for funds used during construction         (14,314)            (10,930)            (11,137)
        Deferred income taxes, net                               258             (14,213)            (23,788)
        Deferred investment tax credits, net                  (5,510)             (5,716)            (10,451)
        Changes in assets and liabilities:
           Receivables, net                                   47,360              (4,883)             14,356
           Materials and supplies                            (11,346)              2,082              11,219
           Accounts and wages payable                          1,882              44,949             (22,335)
           Taxes accrued                                      18,985               6,547              42,622
           Other, net                                         56,036              26,022              (2,941)
                                                        ---------------     ----------------    ---------------
Net Cash Provided by Operating Activities
                                                             724,963             651,106             602,139

Cash Flows From Investing:
   Construction expenditures                                (246,198)           (221,502)           (259,418)
   Allowance for funds used during construction               14,314              10,930              11,137
   Nuclear fuel expenditures                                 (21,901)            (20,432)            (35,432)
   Intercompany note receivable                             (165,700)               --                  --
                                                        ---------------     ----------------    ---------------
Net Cash Used in Investing Activities                       (419,485)           (231,004)           (283,713)

Cash Flows From Financing:
   Dividends on common stock                                (328,674)           (259,599)           (259,395)
   Dividends on preferred stock                               (8,817)             (8,817)             (8,817)
   Redemptions -
      Nuclear fuel lease                                     (15,138)            (67,720)            (28,292)
      Short-term debt                                           --               (21,300)               --
      Long-term debt                                        (100,000)           (195,000)            (45,000)
      Preferred stock                                           --                  --               (63,924)
   Issuances -
      Nuclear fuel lease                                      64,972              16,439              40,337
      Short-term debt                                           --                  --                10,000
      Long-term debt                                         152,150             160,000              35,000
                                                        ---------------     ----------------    ---------------
Net Cash Used in Financing Activities                       (235,507)           (375,997)           (320,091)

Net Change in Cash and Cash Equivalents                       69,971              44,105              (1,665)
Cash and Cash Equivalents at Beginning of Year                47,337               3,232               4,897
                                                        ---------------     ----------------    ---------------
Cash and Cash Equivalents at End of Year                    $117,308             $47,337              $3,232
===============================================================================================================
Cash paid during the periods:
- ---------------------------------------------------------------------------------------------------------------
   Interest (net of amount capitalized)                     $114,212            $125,255            $117,187
   Income taxes                                             $215,373            $223,960            $195,498
- ---------------------------------------------------------------------------------------------------------------

</TABLE>


SUPPLEMENTAL DISCLOSURE OF NONCASH TRANSACTION:
An  extraordinary  charge to earnings was recorded in the fourth quarter of 1997
for the write-off of generation-related regulatory assets and liabilities of the
Company's  Illinois  retail electric  business as a result of electric  industry
restructuring  legislation  enacted in Illinois in December  1997. The write-off
reduced  earnings  $27  million,  net of income  taxes.  See Note 2 - Regulatory
Matters under Notes to Financial Statements for further information.

See Notes to Financial Statements.

                                      -20-

<PAGE>

                             UNION ELECTRIC COMPANY




STATEMENT OF RETAINED EARNINGS
- ------------------------------
(Thousands of Dollars)

- --------------------------------------------------------------------------------
Year Ended December 31,                 1999            1998            1997
Balance at Beginning of Period       $1,211,610      $1,159,956      $1,126,513
- --------------------------------------------------------------------------------
  Add:
  Net income                            349,252         320,070         301,655
- --------------------------------------------------------------------------------
                                      1,560,862       1,480,026       1,428,168
- --------------------------------------------------------------------------------
  Deduct:
  Common stock dividends                328,674         259,599         259,395
  Preferred stock dividends              11,021           8,817           8,817
- --------------------------------------------------------------------------------
                                        339,695         268,416         268,212
- --------------------------------------------------------------------------------
Balance at End of Period             $1,221,167      $1,211,610      $1,159,956
- --------------------------------------------------------------------------------
Under the mortgage indenture, as amended, $31,305 of total retained earnings was
restricted  against payment of common dividends - except those payable in common
stock, leaving $1,189,862 of free and unrestricted retained earnings at December
31, 1999.



SELECTED QUARTERLY INFORMATION (Unaudited)
- --------------------------------
(Thousands of Dollars)

- --------------------------------------------------------------------------------
                              Operating     Operating      Net     Net Income
                              Revenues       Income       Income      After
Quarter Ended                                                       Preferred
                                                                      Stock
                                                                    Dividends
- --------------------------------------------------------------------------------
March 31, 1999 (a)            $506,071      $68,887      $43,743     $41,539
March 31, 1998 (a)            $478,585      $62,120      $30,302     $28,098
June 30, 1999                  621,367       96,292       70,669      68,464
June 30, 1998 (b)              588,676       92,827       66,251      64,046
September 30, 1999             905,850      235,707      208,727     206,523
September 30, 1998 (c)         846,437      233,738      206,551     204,347
December 31, 1999  (d)         493,878       42,382       26,113      23,909
December 31, 1998              468,373       39,498       16,966      14,762
- --------------------------------------------------------------------------------

(a) The first  quarter of 1999 and 1998  included  credits to Missouri  electric
customers  that  reduced  net income  approximately  $11 million and $6 million,
respectively.
(b) The second quarter of 1998 included credits to Missouri  electric  customers
that reduced net income  approximately  $18 million.  Callaway  Plant  refueling
expenses,  which  decreased  net income  approximately  $18  million,  were also
included in the second quarter of 1998.
(c) The third  quarter of 1998  included a  nonrecurring  charge  related to the
targeted employee separation plan that reduced net income $11 million. (See Note
4 - Targeted  Separation  Plan under Notes to Financial  Statements  for further
information.)
(d) The fourth quarter of 1999 included  adjustments that increased  earnings $9
million  as a result of a Report and Order  received  from the  Missouri  Public
Service Commission relating to the Registrant's electric alternative  regulation
plan. (See Note 2 - Regulatory  Matters under Notes to Financial  Statements for
further  information).  In addition,  Callaway Plant refueling  expenses,  which
decreased  net income  approximately  $22  million  were  included in the fourth
quarter of 1999.

Other  changes in  quarterly  earnings are due to the effect of weather on sales
and other factors that are characteristic of public utility operations.

See Notes to Financial Statements.

                                      -21-

<PAGE>

UNION ELECTRIC COMPANY
NOTES TO FINANCIAL STATEMENTS
DECEMBER 31, 1999

NOTE 1 - Summary of Significant Accounting Policies

Basis of Presentation
Union Electric  Company  (AmerenUE or the  Registrant) is a subsidiary of Ameren
Corporation  (Ameren),  which is the  parent  company of two  utility  operating
companies,   the  Registrant  and  Central   Illinois   Public  Service  Company
(AmerenCIPS).  Ameren is a registered  holding  company under the Public Utility
Holding  Company Act of 1935 (PUHCA)  formed in December 1997 upon the merger of
AmerenUE and CIPSCO Incorporated (the Merger).  Both Ameren and its subsidiaries
are subject to the regulatory  provisions of the PUHCA. The operating  companies
are engaged principally in the generation,  transmission,  distribution and sale
of electric energy and the purchase,  distribution,  transportation  and sale of
natural  gas in the  states  of  Missouri  and  Illinois.  Contracts  among  the
companies--dealing  with jointly-owned  generating  facilities,  interconnecting
transmission  lines,  and the exchange of electric  power--are  regulated by the
Federal  Energy  Regulatory  Commission  (FERC) or the  Securities  and Exchange
Commission (SEC). Administrative support services are provided to the Registrant
by a separate Ameren subsidiary,  Ameren Services Company. The Registrant serves
1.1 million  electric and 125,000 gas customers in a 24,500  square-mile area of
Missouri and Illinois, including Metropolitan St. Louis.

The Registrant also has a 40% interest in Electric Energy,  Inc. (EEI), which is
accounted  for under the equity method of  accounting.  EEI owns and operates an
electric generating and transmission facility in Illinois that supplies electric
power primarily to a uranium enrichment plant located in Paducah, Kentucky.

Regulation
In addition to the SEC, the  Registrant  is  regulated  by the  Missouri  Public
Service Commission  (MoPSC),  Illinois Commerce  Commission (ICC), and the FERC.
The accounting  policies of the Registrant  conform to U.S.  generally  accepted
accounting  principles  (GAAP).  See Note 2 -  Regulatory  Matters  for  further
information.

Property and Plant
The cost of  additions  to and  betterments  of units of  property  and plant is
capitalized.  Cost includes labor, material,  applicable taxes and overheads. An
allowance for funds used during  construction is also added for the Registrant's
regulated  assets,  and  interest  incurred  during  construction  is added  for
nonregulated  assets.  Maintenance  expenditures  and the  renewal  of items not
considered  units of property are charged to income as  incurred.  When units of
depreciable  property are  retired,  the original  cost and removal  cost,  less
salvage value, are charged to accumulated depreciation.

Depreciation
Depreciation  is provided  over the  estimated  lives of the various  classes of
depreciable  property by applying composite rates on a straight-line  basis. The
provision for  depreciation in 1999, 1998 and 1997 was  approximately  3% of the
average depreciable cost.

Fuel and Gas Costs
In the Missouri and Illinois retail electric jurisdictions, the cost of fuel for
electric  generation is reflected in base rates with no provision for changes to
be made through fuel adjustment  clauses.  (See Note 2 - Regulatory  Matters for
further  information.)  In the Illinois  jurisdiction  in 1997,  changes in fuel
costs were generally  reflected in billings to electric customers through a fuel
adjustment  clause.  In the  Illinois  and  Missouri  retail gas  jurisdictions,
changes  in gas costs are  generally  reflected  in  billings  to gas  customers
through purchased gas adjustment clauses.

Nuclear Fuel
The cost of nuclear fuel is  amortized  to fuel expense on a  unit-of-production
basis. Spent fuel disposal cost is charged to expense based on net kilowatthours
generated and sold.

Cash and Cash Equivalents
Cash  and  cash  equivalents  include  cash on hand  and  temporary  investments
purchased with an original maturity of three months or less.

Income Taxes
The Registrant is included in the  consolidated  federal income tax return filed
by Ameren. Income taxes are allocated to the individual companies based on their
respective  taxable  income or loss.  Deferred  tax assets and  liabili-

                                      -22-

<PAGE>

ties are  recognized for the tax  consequences  of  transactions  that have been
treated  differently for financial  reporting and tax return purposes,  measured
using statutory tax rates.

Investment  tax  credits  utilized in prior  years were  deferred  and are being
amortized over the useful lives of the related properties.

Allowance for Funds Used During Construction
Allowance  for  funds  used  during  construction  (AFC) is a  utility  industry
accounting  practice  whereby the cost of borrowed  funds and the cost of equity
funds (preferred and common stockholders' equity) applicable to the Registrant's
regulated  construction  program are capitalized as a cost of construction.  AFC
does not  represent a current  source of cash funds.  This  accounting  practice
offsets the effect on earnings of the cost of  financing  current  construction,
and treats such financing costs in the same manner as  construction  charges for
labor and materials.

Under  accepted  ratemaking  practice,  cash  recovery  of AFC, as well as other
construction  costs,  occurs when  completed  projects are placed in service and
reflected  in  customer  rates.  The AFC rates used were 10% during  1999 and 9%
during 1998 and 1997.

Unamortized Debt Discount, Premium and Expense
Discount,  premium and expense associated with long-term debt are amortized over
the lives of the related issues.

Revenue
The  Registrant  accrues an estimate of electric  and gas  revenues  for service
rendered but unbilled at the end of each accounting period.

Energy Contracts
The  Emerging  Issues Task Force of the  Financial  Accounting  Standards  Board
(EITF)  Issue  98-10,   "Accounting  for  Energy  Trading  and  Risk  Management
Activities" became effective on January 1, 1999. EITF 98-10 provides guidance on
the  accounting  for energy  contracts  entered into for the purchase or sale of
electricity,  natural  gas,  capacity  and  transportation.  The EITF  reached a
consensus in EITF 98-10 that sales and purchase  activities being performed need
to be classified as either trading or nontrading. Furthermore, transactions that
are determined to be trading activities would be recognized on the balance sheet
measured  at  fair  value,   with  gains  and  losses   included  in   earnings.
AmerenEnergy,  Inc.,  an energy  marketing  subsidiary  of Ameren,  enters  into
contracts  for the sale and  purchase  of  energy  on  behalf  of  AmerenUE  and
AmerenCIPS.   Currently,   virtually  all  of  AmerenEnergy's  transactions  are
considered  nontrading  activities  and are  accounted  for using the accrual or
settlement method, which represents industry practice. EITF 98-10 did not have a
material impact on the Registrant's  financial position or results of operations
upon adoption.

Software
Statement of Position (SOP) 98-1, "Accounting for the Costs of Computer Software
Developed or Obtained for Internal Use" became effective on January 1, 1999. SOP
98-1  provides  guidance  on  accounting  for the  costs  of  computer  software
developed or obtained for internal  use.  Under SOP 98-1,  certain  costs may be
capitalized  and  amortized  over some  future  period.  SOP 98-1 did not have a
material impact on the Registrant's  financial position or results of operations
upon adoption.

Evaluation of Assets for Impairment
Statement of Financial  Accounting Standards (SFAS) No. 121, "Accounting for the
Impairment of  Long-Lived  Assets and for  Long-Lived  Assets to be Disposed Of"
prescribes  general  standards for the recognition and measurement of impairment
losses. The Registrant determines if long-lived assets are impaired by comparing
their  undiscounted  expected  future cash flows to their  carrying  amount.  An
impairment loss is recognized if the undiscounted expected future cash flows are
less  than the  carrying  amount  of the  asset.  SFAS 121  also  requires  that
regulatory  assets  which are no longer  probable  of  recovery  through  future
revenues be charged to  earnings  (see Note 2 -  Regulatory  Matters for further
information). As of December 31, 1999, no impairment was identified.

Use of Estimates
The  preparation  of  financial  statements  in  conformity  with GAAP  requires
management  to make  certain  estimates  and  assumptions.  Such  estimates  and
assumptions  affect reported amounts of assets and liabilities and disclosure of
contingent  assets and  liabilities at the date of the financial  statements and
the reported amounts of revenues and expenses during the reported period. Actual
results could differ from those estimates.

Reclassifications
Certain reclassifications have been made to prior-years' financial statements to
conform with 1999 reporting.

                                      -23-

<PAGE>

NOTE 2 - Regulatory Matters

Missouri Electric
In  July  1995,  the  MoPSC  approved  an  agreement  establishing   contractual
obligations  involving the Registrant's Missouri retail electric rates. Included
was a three-year  experimental  alternative  regulation plan (the Original Plan)
that ran from July 1, 1995,  through June 30, 1998, which provided that earnings
in those years in excess of a 12.61% regulatory return on equity (ROE) be shared
equally  between  customers and  stockholders,  and earnings  above a 14% ROE be
credited to customers.  The formula for  computing the credit used  twelve-month
results  ending June 30,  rather  than  calendar  year  earnings.  In 1996,  the
Registrant  recorded a $47  million  credit  for the first year of the  Original
Plan, which reduced earnings $28 million. During 1997, the Registrant recorded a
$20  million  credit for the second year of the  Original  Plan,  which  reduced
earnings $11 million.  In 1998, the Registrant recorded an estimated $43 million
credit for the final year of the  Original  Plan,  which  reduced  earnings  $26
million.

Included in the joint agreement approved by the MoPSC in its February 1997 order
authorizing the Merger, was a new three-year experimental alternative regulation
plan (the New Plan) that runs from July 1, 1998, through June 30, 2001. Like the
Original Plan, the New Plan requires that earnings over a 12.61% ROE up to a 14%
ROE be shared  equally  between  customers and  shareholders.  The New Plan also
returns  to  customers  90% of all  earnings  above a 14%  ROE up to a 16%  ROE.
Earnings above a 16% ROE are credited  entirely to customers.  In addition,  the
joint agreement  provides for a Missouri electric rate decrease,  retroactive to
September  1, 1998,  based on the  weather-adjusted  average  annual  credits to
customers  under the Original Plan.  The Registrant  estimated that its Missouri
electric rate decrease should approximate $20 million on an annualized basis and
reduced revenues accordingly since September 1998.

In November 1998, the MoPSC Staff  proposed  adjustments to the customer  credit
for the third year of the Original  Plan. In addition,  the MoPSC Staff proposed
adjustments to the Registrant's  estimated Missouri electric rate decrease based
upon  their  methodology  of  calculating  the  weather-adjusted   credits.  The
determination  of the credit for the third year of the Original Plan, as well as
the  determination  of the  Missouri  electric  rate  decrease,  were subject to
regulatory proceedings before the MoPSC in 1999.

On December 23, 1999, the MoPSC issued a Report and Order (Order) related to the
customer  credit for the third year of the Original  Plan.  Certain of the MoPSC
staff's  proposed  adjustments  were  accepted  by the  MoPSC in the  Order.  In
addition,  the Order requires the Registrant to capitalize and amortize  certain
costs (including  computer software costs) that had previously been expensed for
its Missouri electric operations.

Based on the provisions of the Order,  the Registrant  estimates that the credit
for the  third  year of the  Original  Plan will  approximate  $31  million.  In
addition,  with regard to the Missouri  electric rate decrease,  the Registrant,
the  MoPSC  staff,  and  other  parties  reached  a  settlement  related  to the
calculation  of  the  weather-adjusted  credits.  As a  result,  the  Registrant
estimates that the annualized  Missouri  electric rate decrease will approximate
$17 million.  On February 24, 2000, the Registrant  filed a Petition for Writ of
Review with the Circuit Court of Cole County, Missouri, asking that the Order be
reversed.  The  Registrant has also requested that the court issue a stay of the
MoPSC's  Order.  While it is unable  to  predict  the  ultimate  outcome  of the
judicial  appeal of the MoPSC's Order,  the  Registrant  believes that the final
decision  will not have a material  adverse  effect on its  financial  position,
results of operations or liquidity.

The  provisions  of the Order  also have an  impact on the  estimated  credit to
electric  customers  recorded  by the  Registrant  for the first year of the New
Plan. As a result,  the Registrant  recorded an estimated  credit of $25 million
for the plan year ended June 30, 1999. In addition,  the Registrant  recorded an
estimated $20 million  credit for the 1999 portion of the second year of the New
Plan.  Also,  the  provision  of the Order  which  requires  the  Registrant  to
capitalize and amortize certain costs (including  computer  software costs) that
had been previously expensed resulted in the capitalization of approximately $20
million of costs in the fourth quarter of 1999.

In  summary,  the  provisions  of the Order  and the  resulting  changes  in the
Registrant's  estimates of credits and Missouri  electric  rate decrease for the
open years under the Original  Plan and the New Plan  resulted in an increase in
earnings of approximately $9 million in the fourth quarter of 1999.

On December 30, 1999,  the  Registrant  filed a request for  rehearing  with the
MoPSC,  asking that it  reconsider  its  decision to adopt  certain of the MoPSC
staff's  adjustments.  On January 25, 2000,  the MoPSC  denied the  Registrant's
request. The Registrant plans to file an appeal with the courts.

                                      -24-

<PAGE>

Gas
In December  1997,  the MoPSC  approved a $12 million  annual rate  increase for
natural gas service in the Registrant's Missouri jurisdiction. The rate increase
became effective in February 1998.

Midwest ISO
In 1998, the  Registrant  joined a group of companies that support the formation
of the Midwest  Independent System Operator (Midwest ISO). An ISO operates,  but
does not own, electric transmission systems and maintains system reliability and
security while  alleviating  pricing issues  associated  with the "pancaking" of
rates.   The   Midwest   ISO  would  be   regulated   by  the   FERC.   Thirteen
transmission-owning  utilities  have joined the Midwest  ISO, as of December 31,
1999.  The FERC  conditionally  approved  the  formation  of the  Midwest ISO in
September  1998, and it is expected to be operational  during the year 2001. The
MoPSC and the ICC have  authorized the Registrant to join the Midwest ISO and to
transfer control of its transmission  facilities to the Midwest ISO. The Midwest
ISO covers 14 states,  represents  portions of 60,000 miles of transmission line
and controls $8 billion in assets. The Registrant believes that the operation of
the  Midwest  ISO will not  have a  material  adverse  effect  on its  financial
condition, results of operations or liquidity.

In  December  1999,  the  FERC  issued  its  Order  2000  relating  to  Regional
Transmission  Organizations (RTOs) that would meet certain  characteristics such
as size and  independence.  Order 2000 calls on all transmission  owners to join
RTOs.  In  particular,  all  public  utilities  that own,  operate,  or  control
interstate  transmission facilities must file with the FERC by October 15, 2000,
a proposal for an RTO, or  alternatively a description of efforts by the utility
to join an RTO. The Registrant expects that its participation in the Midwest ISO
will satisfy the requirements of Order 2000.

Illinois Electric Restructuring
Certain states are considering  proposals or have adopted  legislation that will
promote  competition  at the retail  level.  In December  1997,  the Governor of
Illinois signed the Electric Service Customer Choice and Rate Relief Law of 1997
(the Illinois Law)  providing for electric  utility  restructuring  in Illinois,
where approximately 6% of the Registrant's retail electric revenues are derived.
This  legislation  introduces  competition into the supply of electric energy at
retail in Illinois.

Under the Illinois Law, retail direct access,  which allows  customers to choose
their  electric  generation  suppliers,  will be phased in over  several  years.
Access for  commercial  and  industrial  customers will occur over a period from
October 1999 to December 2000, and access for  residential  customers will occur
after May 1, 2002.

As a  requirement  of the  Illinois  Law, in March 1999,  the  Registrant  filed
delivery  service  tariffs with the ICC. These tariffs would be used by electric
customers who choose to purchase their power from alternate suppliers. On August
25, 1999, the ICC issued an order approving the delivery services tariffs,  with
an allowed rate of return on equity of 10.45%.  The  Registrant  and  AmerenCIPS
filed a joint  petition for rehearing of that order  requesting the ICC to alter
its  conclusions  on a number of issues.  On October 13, 1999, the ICC granted a
rehearing on certain issues. An order on this reopened  proceeding was issued in
2000 resolving all outstanding issues.

The  Illinois  Law  included a 5%  residential  electric  rate  decrease for the
Registrant's  Illinois electric  customers,  effective August 1, 1998. This rate
decrease  reduced  electric  revenues  approximately  $1  million  in 1999.  The
Registrant may be subject to additional 5%  residential  electric rate decreases
in each of 2000 and 2002,  to the extent its rates  exceed the  Midwest  utility
average at that time.  The  Registrant's  rates are currently  below the Midwest
utility average.

As a result of the Illinois Law, the Registrant filed a proposal with the ICC to
eliminate their electric fuel adjustment  clause for Illinois retail  customers,
thereby  including  a  historical  levels of fuel costs in base  rates.  The ICC
approved the Registrant's filing in early 1998.

The Illinois Law also  contains a provision  requiring  that  one-half of excess
earnings  from the  Illinois  jurisdiction  for the years 1998  through  2004 be
refunded to the Registrant's Illinois customers.  Excess earnings are defined as
the portion of the two-year  average  annual rate of return on common  equity in
excess of 1.5% of the two-year  average of an Index,  as defined in the Illinois
Law. The Index is defined as the sum of the average for the twelve  months ended
September  30 of the average  monthly  yields of the 30-year US Treasury  bonds,
plus prescribed percentages ranging from 4% to 7%. Filings must be made with the
ICC on, or before, March 31 of each year 2000 through 2005.

Other provisions of the Illinois Law include (1) potential recovery of a portion
of strandable  costs,  which represent costs which would not be recoverable in a
restructured  environment,  through a transition charge collected from

                                      -25-

<PAGE>

customers who choose another  electric  supplier;  (2) a mechanism to securitize
certain  future  revenues;  and (3) a provision  relieving the Registrant of the
requirement  to file  electric  rate cases or  alternative  regulatory  plans in
Illinois, following the consummation of the Merger to reflect the effects of net
merger savings.

The Registrant's  accounting  policies and financial  statements conform to GAAP
applicable  to  rate-regulated  enterprises  and  reflect  the  effects  of  the
ratemaking  process in accordance  with SFAS 71,  "Accounting for the Effects of
Certain  Types of  Regulation."  Such effects  concern  mainly the time at which
various items enter into the  determination of net income in order to follow the
principle  of  matching  costs and  revenues.  For  example,  SFAS 71 allows the
Registrant  to record  certain  assets and  liabilities  (regulatory  assets and
regulatory  liabilities)  that are expected to be recovered or settled in future
rates  and  would not be  recorded  under  GAAP for  nonregulated  entities.  In
addition, reporting under SFAS 71 allows companies whose service obligations and
prices are  regulated to maintain  assets on their balance  sheets  representing
costs they  reasonably  expect to recover from customers,  through  inclusion of
such costs in future rates.  SFAS 101,  "Accounting  for the  Discontinuance  of
Application of FASB  Statement No. 71," specifies how an enterprise  that ceases
to  meet  the  criteria  for  application  of  SFAS  71 for  all or  part of its
operations  should  report that event in its financial  statements.  In general,
SFAS 101 requires that the enterprise  report the  discontinuance  of SFAS 71 by
eliminating from its balance sheet all regulatory assets and liabilities related
to the portion of the business  that no longer  meets the SFAS 71 criteria.  The
EITF has concluded that application of SFAS 71 accounting should be discontinued
once sufficiently  detailed  deregulation  legislation is issued for a separable
portion of a business  for which a plan of  deregulation  has been  established.
However,  the EITF further  concluded that regulatory assets associated with the
deregulated  portion of the business,  which will be recovered  through  tariffs
charged  to  customers  of a  regulated  portion  of  the  business,  should  be
associated  with the  regulated  portion of the business  from which future cash
recovery  is  expected  (not the  portion of the  business  from which the costs
originated).  Those assets can therefore continue to be carried on the regulated
entity's balance sheet to the extent such assets are  recoverable.  In addition,
SFAS 121  establishes  accounting  standards  for the  impairment  of long-lived
assets.

Due to the  enactment  of the  Illinois  Law,  prices for the  retail  supply of
electric generation are expected to transition from cost-based,  regulated rates
to rates  determined in large part by competitive  market forces in the state of
Illinois.  As a result, the Registrant  discontinued  application of SFAS 71 for
the Illinois retail portion of its generating business (i.e., the portion of the
Registrant's  business  related to the supply of electric energy in Illinois) in
the fourth quarter of 1997. The Registrant  evaluated the impact of the Illinois
Law on the  future  recoverability  of its  regulatory  assets  and  liabilities
related to the generation portion of its business and determined that it was not
probable that such assets and  liabilities  would be recovered  through the cash
flows from the regulated portion of its business.  Accordingly, the Registrant's
generation-related  regulatory  assets and  liabilities  of its Illinois  retail
electric  business were written off in the fourth quarter of 1997,  resulting in
an extraordinary  charge to earnings of $27 million,  net of income taxes. These
regulatory assets and liabilities  included previously incurred costs originally
expected to be collected/refunded  in future revenues,  such as deferred charges
related to a  generating  plant and  income  tax-related  regulatory  assets and
liabilities.   In  addition,   the   Registrant   has   evaluated   whether  the
recoverability of the costs associated with its remaining net generation-related
assets has been impaired as defined under SFAS 121. The Registrant has concluded
that  impairment,  as defined  under SFAS 121,  does not exist and that no plant
writedowns are necessary at this time.

In August 1999,  the Registrant  filed a transmission  system rate case with the
FERC.  This  filing  was  primarily  designed  to  implement  rates,  terms  and
conditions for  transmission  service for those retail customers in Illinois who
choose other  suppliers as allowed  under the Illinois Law. On October 14, 1999,
the FERC issued an order  suspending the proposed rates until March 25, 2000. In
January  2000, a settlement  in principle  was reached with the FERC trial staff
and  other  interested  parties.  The  settlement   establishes  the  rates  for
transmission  service  that are to go into effect in the first  quarter of 2000.
The settlement is subject to approval by the FERC.  The Registrant  expects that
the FERC will approve the settlement in 2000.

The provisions of the Illinois Law could also result in lower revenues,  reduced
profit margins and increased  costs of capital and operations  expense.  At this
time,  the  Registrant  is unable to determine the impact of the Illinois Law on
the Registrant's future financial condition, results of operations or liquidity.

Missouri Electric Restructuring
In  Missouri,  where  approximately  94% of  the  Registrant's  retail  electric
revenues are derived, a task force appointed by the MoPSC investigated  electric
industry restructuring and competition.  In 1998, the task force issued a report
to the MoPSC that addressed many of the restructuring issues but did not provide
a specific  recommendation or approach to restructure the industry. In addition,
in 1998,  the MoPSC staff issued a proposed  plan for  restructuring  Missouri's
electric  industry.  The staff's plan addressed a number of issues of concern if
the industry is restructured  in Missouri.  It also included a proposal for less
than full recovery of strandable  costs. The staff's plan has not been

                                      -26-

<PAGE>

addressed by the MoPSC.  A joint  committee of the Missouri  legislature is also
conducting hearings on these issues. Several restructuring bills were introduced
by the Missouri legislature in 1999 and 2000.

The  Registrant is unable to predict the timing or ultimate  outcome of electric
industry  restructuring  in the  state of  Missouri,  as well as the  impact  of
potential  electric industry  restructuring  matters on the Registrant's  future
financial condition,  results of operations or liquidity. The potential negative
consequences of electric industry restructuring could be significant and include
the impairment and write-down of certain  assets,  including  generation-related
plant and net  regulatory  assets,  lower  revenues,  reduced profit margins and
increased  costs of capital and  operations  expense.  At December 31, 1999, the
Registrant's  net  investment in generation  facilities  related to its Missouri
jurisdiction  approximated  $2.6  billion and was  included  in  electric  plant
in-service on the Registrant's balance sheet. In addition, at December 31, 1999,
the Registrant's Missouri net generation-related  regulatory assets approximated
$454 million.

Regulatory Assets and Liabilities
In accordance  with SFAS 71, the Registrant has deferred  certain costs pursuant
to actions of its regulators, and is currently recovering such costs in electric
rates charged to customers.

At December 31, the Registrant had recorded the following  regulatory assets and
regulatory liability:
- -----------------------------------------------------------------------
(in millions)                                   1999              1998
- -----------------------------------------------------------------------
Regulatory Assets:
  Income taxes                                  $601              $608
  Callaway costs                                  92                95
 Unamortized loss on reacquired debt              24                26
 Merger costs                                     22                24
  Other                                           18                20
- -----------------------------------------------------------------------
Regulatory Assets                               $757              $773
- -----------------------------------------------------------------------
Regulatory Liability:
  Income taxes                                  $154              $159
- -----------------------------------------------------------------------
Regulatory Liability                            $154              $159
- -----------------------------------------------------------------------

Income Taxes:  See Note 10 - Income Taxes.
Callaway Costs:  Represents  Callaway  Nuclear Plant  operations and maintenance
expenses,   property  taxes  and  carrying  costs  incurred  between  the  plant
in-service  date and the date the plant was reflected in rates.  These costs are
being amortized over the remaining life of the plant (through 2024).
Unamortized Loss on Reacquired Debt: Represents losses related to refunded debt.
These amounts are being  amortized over the lives of the related new debt issues
or the remaining lives of the old debt issues if no new debt was issued.  Merger
Costs:  Represents  the portion of  merger-related  expenses  applicable  to the
Missouri retail  jurisdiction.  These costs are being amortized within 10 years,
based on a MoPSC order.

The Registrant continually assesses the recoverability of its regulatory assets.
Under  current  accounting  standards,  regulatory  assets  are  written  off to
earnings  when it is no longer  probable  that such  amounts  will be  recovered
through future revenues.  However,  as noted in the above  paragraphs,  electric
industry  restructuring  legislation may impact the recoverability of regulatory
assets in the future.

NOTE 3 - Related Party Transactions

The  Registrant  has  transactions  in the normal  course of business with other
Ameren  subsidiaries.  These  transactions  are  primarily  comprised  of  power
purchases and sales and services received or rendered.  Intercompany receivables
included in other accounts and notes receivable were  approximately  $15 million
and $6 million,  respectively,  as of December  31, 1999 and 1998.  Intercompany
payables  included in  accounts  and wages  payable  totaled  approximately  $25
million and $17 million, respectively, as of December 31, 1999 and 1998.

In  addition,  the  Registrant  has the  ability to borrow  funds from Ameren or
AmerenCIPS or invest funds through a regulated money pool agreement. At December
31, 1999,  the  Registrant  had  outstanding  intercompany  receivables  of $166
million through the regulated money pool. See Note 8 - Short-Term Borrowings for
further information.

                                      -27-

<PAGE>

NOTE 4 - Targeted Separation Plan

In July 1998,  Ameren offered  separation  packages to employees whose positions
were  eliminated  through a targeted  separation  plan  (TSP).  During the third
quarter of 1998,  a  nonrecurring,  pretax  charge of $18 million was  recorded,
which reduced earnings $11 million, representing the Registrant's share of costs
incurred to implement the TSP.

NOTE 5 - Concentration of Risk

Market Risk
The  Registrant   engages  in  price  risk  management   activities  related  to
electricity and fuel. In addition to buying and selling these  commodities,  the
Registrant  uses  derivative  financial  instruments  to manage market risks and
reduce exposure  resulting from fluctuations in interest rates and the prices of
electricity  and fuel.  Derivative  instruments  used include  futures,  forward
contracts and options. The use of these types of contracts allows the Registrant
to manage and hedge its contractual  commitments and reduce exposure  related to
the volatility of commodity market prices.

Credit Risk
Credit risk represents the loss that would be recognized if counterparties  fail
to perform as contracted.  New York Mercantile  Exchange  (NYMEX) traded futures
contracts  are  guaranteed  by NYMEX and have nominal  credit risk. On all other
transactions,  the  Registrant  is  exposed  to  credit  risk  in the  event  of
nonperformance by the counterparties in the transaction.

The Registrant's  financial instruments subject to credit risk consist primarily
of trade accounts  receivables and forward  contracts.  The risk associated with
trade receivables is mitigated by the large number of customers in a broad range
of industry groups  comprising the Registrant's  customer base. The Registrant's
revenues  are  primarily  derived from sales of  electricity  and natural gas to
customers in Missouri and Illinois.  For each counterparty in forward contracts,
the Registrant analyzes the counterparty's financial condition prior to entering
into an agreement, establishes credit limits and monitors the appropriateness of
these limits on an ongoing basis through a credit risk management program.

NOTE 6 - Nuclear Fuel Lease

The Registrant has a lease  agreement that provides for the financing of nuclear
fuel. At December 31, 1999,  the maximum amount that could be financed under the
agreement was $120 million.  Pursuant to the terms of the lease,  the Registrant
has assigned to the lessor  certain  contracts for purchase of nuclear fuel. The
lessor  obtains,  through the issuance of commercial  paper or from direct loans
under  a  committed  revolving  credit  agreement  from  commercial  banks,  the
necessary funds to purchase the fuel and make interest payments when due.

The  Registrant  is obligated to reimburse the lessor for all  expenditures  for
nuclear fuel,  interest and related costs.  Obligations  under this lease become
due as the nuclear fuel is consumed at the Registrant's  Callaway Nuclear Plant.
The  Registrant  reimbursed  the lessor $16 million in 1999,  $23 million during
1998 and $31 million during 1997.

The Registrant has capitalized the cost,  including  certain  interest costs, of
the leased  nuclear fuel and has recorded the related  lease  obligation.  Total
interest charges under the lease were $5 million in 1999 and 1998 and $6 million
in 1997.  Interest  charges for these years were based on average interest rates
of approximately 6%. Interest charges of $4 million were capitalized in 1999 and
$3 million were capitalized in 1998 and 1997.

                                      -28-

<PAGE>

NOTE 7 - Preferred Stock

At  December  31,  1999 and  1998,  the  Registrant  had 25  million  shares  of
authorized preferred stock.

Outstanding   preferred  stock  is  entitled  to  cumulative  dividends  and  is
redeemable at the redemption prices shown below:
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Preferred Stock Not Subject to Mandatory Redemption:
(in millions)
- --------------------------------------------------------------------------------
                                           Redemption Price        December 31,
                                              (per share)         1999     1998
Without par value and stated value
 of $100 per share--
$7.64 Series     - 330,000 shares          $103.82 - note (a)      $33      $33
$5.50 Series A -   14,000 shares            110.00                   1        1
$4.75 Series     - 20,000 shares            102.176                  2        2
$4.56 Series     - 200,000 shares           102.47                  20       20
$4.50 Series     - 213,595 shares           110.00 - note (b)       21       21
$4.30 Series     - 40,000 shares            105.00                   4        4
$4.00 Series     - 150,000 shares           105.625                 15       15
$3.70 Series     - 40,000 shares            104.75                   4        4
$3.50 Series     - 130,000 shares           110.00                  13       13

Without par value and stated value of
 $25 per share--
$1.735 Series  - 1,657,500 shares            25.00                  42       42
- --------------------------------------------------------------------------------

TOTAL PREFERRED STOCK NOT
SUBJECT TO MANDATORY REDEMPTION                                   $155     $155
- --------------------------------------------------------------------------------

(a)  Beginning February 15, 2003, eventually declining to $100 per share.
(b)  In the event of voluntary liquidation, $105.50.

- --------------------------------------------------------------------------------

NOTE 8 - Short-Term Borrowings

Short-term  borrowings  of the  Registrant  consist  of bank  loans  (maturities
generally on an overnight  basis) and  commercial  paper  (maturities  generally
within  10-45  days).  At  December  31,  1999 and 1998  the  Registrant  had no
outstanding short-term borrowings.

At  December  31,  1999,  the  Registrant  had  committed  bank  lines of credit
aggregating  $150 million  (all of which was unused and  available at such date)
which make  available  interim  financing at various rates of interest  based on
LIBOR,  the bank  certificate of deposit rate, or other options.  These lines of
credit are renewable annually at various dates throughout the year.

Also, the Registrant has the ability to borrow up to approximately  $530 million
from  Ameren or  AmerenCIPS  through  a  regulated  money  pool  agreement.  The
regulated  money pool was  established  to  coordinate  and  provide for certain
short-term cash and working capital  requirements  and is administered by Ameren
Services Company.  Interest is calculated at varying rates of interest depending
on the  composition of internal and external funds in the regulated  money pool.
At December 31, 1999, the Registrant had no intercompany  borrowings outstanding
and $402 million available through the regulated money pool.

                                      -29-

<PAGE>



NOTE 9 - Long-Term Debt

- --------------------------------------------------------------------------------
(in millions)                                            1999             1998
- --------------------------------------------------------------------------------
First Mortgage Bonds - note (a)
- --------------------------------------------------------------------------------
  6 3/4% Series paid in 1999                            $ -             $100
  8.33%  Series due 2002                                 75               75
  7.65%  Series due 2003                                100              100
  6 7/8% Series due 2004                                188              188
  7 3/8% Series due 2004                                 85               85
  6 3/4% Series due 2008                                148              148
  7.40%  Series due 2020 - note (b)                      60               60
  8 3/4% Series due 2021                                125              125
  8%     Series due 2022                                 85               85
  8 1/4% Series due 2022                                104              104
  7.15%  Series due 2023                                 75               75
  7%     Series due 2024                                100              100
  5.45%  Series due 2028 - note (b)                      44               44
- --------------------------------------------------------------------------------
                                                      1,189            1,289
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
Missouri Environmental Improvement Revenues Bonds
- --------------------------------------------------------------------------------
  1985 Series A due 2015 - note (c)                      70               70
  1985 Series B due 2015 - note (c)                      57               57
  1991 Series due 2020 - note (c)                        43               43
  1992 Series due 2022 - note (c)                        47               47
  1998 Series A due 2033 - note (c)                      60               60
  1998 Series B due 2033 - note (c)                      50               50
  1998 Series C due 2033 - note (c)                      50               50
- --------------------------------------------------------------------------------
                                                        377              377
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
Subordinated Deferrable Interest Debentures
- --------------------------------------------------------------------------------
  7.69% Series A due 2036 - note (d)                     66              66
- -------------------------------------------------------------------------------
Commercial Paper - note (e)                             152              --
- -------------------------------------------------------------------------------
Nuclear Fuel Lease                                      116              66
- -------------------------------------------------------------------------------
Unamortized Discount and Premium on Debt                 (6)             (7)
- -------------------------------------------------------------------------------
Maturities Due Within One Year                          (11)           (117)
 ------------------------------------------------------------------------------
Total Long-Term Debt                                 $1,883          $1,674
- -------------------------------------------------------------------------------

(a)  At December  31,  1999,  substantially  all of the  property  and plant was
     mortgaged  under,  and  subject  to liens  of,  the  respective  indentures
     pursuant to which the bonds were issued.
(b)  Environmental Improvement Series.
(c)  Interest  rates,  and the  periods  during  which  such rates  apply,  vary
     depending on the Registrant's  selection of certain defined rate modes. The
     average interest rates for the year 1999 are as follows:
                   1985 Series A            3.21%
                   1985 Series B            3.29%
                   1991 Series              3.65%
                   1992 Series              3.55%
                   1998 Series A            3.49%
                   1998 Series B            3.48%
                   1998 Series C            3.46%
(d)  During the terms of the  debentures,  the  Registrant  may,  under  certain
     circumstances, defer the payment of interest for up to five years.
(e)  A bank credit agreement,  due 2002,  permits the Registrant to borrow or to
     support commercial paper borrowings up to $300 million. Interest rates will
     vary  depending  on  market  conditions.  At  December  31,  1999,  no such
     borrowings were outstanding.

Maturities of long-term debt through 2004 are as follows:
- ----------------------------------------
(in millions)        Principal Amount
- ----------------------------------------
2000                       $ 11
2001                         --
2002                        227
2003                        100
2004                        273
- ----------------------------------------

Amounts for years  subsequent to 2000 do not include nuclear fuel lease payments
since the amounts of such payments are not currently determinable.

                                      -30-

<PAGE>

NOTE 10 - Income Taxes

Total income tax expense for 1999  resulted in an  effective  tax rate of 40% on
earnings before income taxes (40% in 1998 and 38% in 1997).

Principal reasons such rates differ from the statutory federal rate:
- ------------------------------------------------------------------------
                                          1999      1998     1997
- ------------------------------------------------------------------------
Statutory federal income
  tax rate                                 35%       35%      35%
Increases (Decreases) from:
  Depreciation differences                  2         2        2
  State income tax                          4         4        4
  Other                                    (1)       (1)      (3)
- ------------------------------------------------------------------------
Effective income tax rate                  40%       40%      38%
- ------------------------------------------------------------------------

Income tax expense components:
- ------------------------------------------------------------------------
(in millions)                             1999      1998     1997
- ------------------------------------------------------------------------
Taxes currently payable (principally
  federal):
Included in operating expenses           $236      $237     $216
Included in other income--
     Miscellaneous, net                    (4)       (5)      (3)
- ------------------------------------------------------------------------
                                          232       232      213
Deferred taxes (principally federal):
Included in operating expenses--
     Depreciation differences               9        (1)      (7)
     Other                                 (9)      (14)     (10)
Included in other income--
     Depreciation differences              --        --        1
     Other                                 --        --        9
- ------------------------------------------------------------------------
                                           --       (15)      (7)
Deferred investment tax credits,
  Amortization
Included in operating expenses             (5)       (5)      (6)
- ------------------------------------------------------------------------
Total income tax expense                 $227      $212     $200
- ------------------------------------------------------------------------

In accordance with SFAS 109,  "Accounting for Income Taxes," a regulatory asset,
representing the probable recovery from customers of future income taxes,  which
is expected to occur when temporary differences reverse, was recorded along with
a  corresponding   deferred  tax  liability.   Also,  a  regulatory   liability,
recognizing  the lower  expected  revenue  resulting  from reduced  income taxes
associated  with amortizing  accumulated  deferred  investment tax credits,  was
recorded.  Investment  tax credits have been  deferred  and will  continue to be
credited to income over the lives of the related property.

The Registrant  adjusts its deferred tax  liabilities for changes enacted in tax
laws or rates.  Recognizing that regulators will probably reduce future revenues
for  deferred  tax  liabilities  initially  recorded  at rates in  excess of the
current  statutory rate;  reductions in the deferred tax liability were credited
to the regulatory liability.

Temporary  differences  gave  rise to the  following  deferred  tax  assets  and
deferred tax liabilities at December 31:
- ------------------------------------------------------------------------------
(in millions)                                             1999        1998
- ------------------------------------------------------------------------------
Accumulated Deferred Income Taxes:
  Depreciation                                            $822        $814
  Regulatory assets, net                                   462         465
  Capitalized taxes and expenses                            60          68
  Deferred benefit costs                                   (47)        (48)
- ------------------------------------------------------------------------------
Total net accumulated deferred income tax liabilities   $1,297      $1,299
- ------------------------------------------------------------------------------

                                      -31-

<PAGE>

NOTE 11 - Retirement Benefits

On January 1, 1999,  the AmerenUE and the  AmerenCIPS  defined  benefit  pension
plans  combined  to form the Ameren  Retirement  plan.  The Ameren  plan  covers
qualified  employees of the  Registrant.  Benefits  are based on the  employees'
years of service and compensation.  The Ameren plan is funded in compliance with
income tax regulations and federal funding requirements.  The Registrant,  along
with other  subsidiaries  of Ameren,  is a participant in the Ameren plan and is
responsible  for  its  proportional  share  of  the  costs  and  the  assets  or
liabilities.  The  Registrant's  share of the  pension  costs  for 1999 were $18
million,  of which approximately 18% was charged to construction  accounts.  The
AmerenUE pension plan information for 1998 and 1997 is presented separately.

Pension  costs for the years  1998 and 1997 were $28  million  and $24  million,
respectively,  of which approximately 19% and 17%, respectively,  was charged to
construction accounts.

Funded Status of Pension Plans:
- ------------------------------------------------------------------------
 (in millions)                                                 1998
- ------------------------------------------------------------------------
Change in benefit obligation
  Net benefit obligation at beginning of year                  $999
  Service cost                                                   24
  Interest cost                                                  70
  Amendments                                                     10
  Actuarial loss                                                 38
  Special termination benefit charge                              7
  Benefits paid                                                 (88)
- ------------------------------------------------------------------------
  Net benefit obligation at end of year                       1,060

Change in plan assets *
  Fair value of plan assets at beginning of year              1,006
  Actual return on plan assets                                  122
  Employer contributions                                          1
  Benefits paid                                                 (88)
- ------------------------------------------------------------------------
  Fair value of plan assets at end of year                    1,041

Funded status - deficiency                                       19
Unrecognized net actuarial gain                                 121
Unrecognized prior service cost                                 (73)
Unrecognized net transition asset                                 6
- ------------------------------------------------------------------------
Accrued pension cost at December 31                             $73
- ------------------------------------------------------------------------
* Plan assets consist principally of common stocks and fixed income securities.

Components of Net Periodic Benefit Cost:
- --------------------------------------------------------------------------------
(in millions)                                        1998             1997
- --------------------------------------------------------------------------------
Service cost                                         $24              $22
Interest cost                                         70               69
Expected return on plan assets                       (75)             (71)
Amortization of:
      Transition asset                                (1)              (1)
      Prior service cost                               6                7
      Actuarial gain                                  (3)              (2)
 Special termination benefit charge                    7               --
- --------------------------------------------------------------------------------
Net periodic benefit cost                            $28              $24
- --------------------------------------------------------------------------------

Weighted-average  Assumptions for Actuarial  Present Value of Projected  Benefit
Obligations:
- --------------------------------------------------------------
                                                    1998
- --------------------------------------------------------------
Discount rate at measurement date                   6.75%
Expected return on plan assets                       8.5%
Increase in future compensation                        4%
- --------------------------------------------------------------

In addition to providing  pension  benefits,  the  Registrant  provides  certain
health care and life insurance  benefits for retired  employees.  The Registrant
accrues the expected  postretirement  benefit costs during  employees'  years of
service.

                                      -32-

<PAGE>

The Registrant's  funding policy is to annually contribute the net periodic cost
to a Voluntary  Employee  Beneficiary  Association trust (VEBA).  Postretirement
benefit costs were $46 million in 1999,  $43 million for 1998 and $44 million in
1997, of which  approximately  18% in 1999 and 17% in 1998 and 1997 were charged
to construction accounts. The Registrant's transition obligation at December 31,
1999 is being amortized over the next 13 years.

The MoPSC and the ICC allow the  recovery  of  postretirement  benefit  costs in
rates to the extent that such costs are funded. In December 1995, the Registrant
established  two external trust funds for retiree health care and life insurance
benefits. In 1998, 1997 and 1996, claims were paid out of the plan trust funds.

Funded Status of the Plans:
- --------------------------------------------------------------------------------
 (in millions)                                         1999             1998
- --------------------------------------------------------------------------------
Change in benefit obligation
  Net benefit obligation at beginning of year          $360             $333
  Service cost                                           15               14
  Interest cost                                          25               24
  Actuarial (gain)/loss                                 (20)               9
  Benefits paid                                         (26)             (20)
- --------------------------------------------------------------------------------
  Net benefit obligation at end of year                 354              360

Change in plan assets *
  Fair value of plan assets at beginning of year        110               81
  Actual return on plan assets                            4                8
  Employer contributions                                 46               44
  Unincorporated business income tax                     --               (3)
  Benefits paid                                         (26)             (20)
- --------------------------------------------------------------------------------
  Fair value of plan assets at end of year              134              110

Funded status - deficiency                              220              250
Unrecognized net actuarial gain                          29               11
Unrecognized prior service cost                          (3)              (3)
Unrecognized net transition obligation                 (162)            (175)
- --------------------------------------------------------------------------------
Postretirement benefit liability at December 31         $84              $83
- --------------------------------------------------------------------------------
* Plan assets consist principally of common stocks and fixed income securities.

Components of Net Periodic Benefit Cost:
- --------------------------------------------------------------------------------
(in millions)                                   1999        1998        1997
- --------------------------------------------------------------------------------
Service cost                                    $15         $14         $12
Interest cost                                    25          24          23
Expected return on plan assets                   (6)         (5)         (2)
Amortization of:
      Transition obligation                      12          12          12
      Actuarial gain                             --          (2)         (1)
- --------------------------------------------------------------------------------
Net periodic benefit cost                       $46         $43         $44
- --------------------------------------------------------------------------------

Assumptions for the Obligation Measurements:
- --------------------------------------------------------------------------------
                                                       1999           1998
- --------------------------------------------------------------------------------
Discount rate at measurement date                      7.75%          6.75%
Expected return on plan assets                          8.5%           8.5%
Medical cost trend rate - initial                        --           5.75%
                        - ultimate                     5.25%          4.75%
Ultimate medical cost trend rate expected in year       2000          2000
- --------------------------------------------------------------------------------

A one  percentage  point increase in the medical cost trend rate is estimated to
increase  the net  periodic  cost  and the  accumulated  postretirement  benefit
obligation  approximately  $4  million  and  $31  million,  respectively.  A one
percentage  point  decrease  in the  medical  cost  trend rate is  estimated  to
decrease  the net  periodic  cost  and the  accumulated  postretirement  benefit
obligation approximately $4 million and $31 million, respectively.

                                      -33-

<PAGE>

NOTE 12 - Commitments and Contingencies

The  Registrant  is  engaged  in a  capital  program  under  which  expenditures
averaging approximately $317 million, including AFC, are anticipated during each
of the next five years. This estimate includes capital expenditures that will be
incurred  by the  Registrant  to meet new air  quality  standards  for ozone and
particulate matter, as discussed later in this Note.

The  Registrant  has  commitments  for  the  purchase  of coal  under  long-term
contracts.  Coal contract commitments,  including transportation costs, for 2000
through  2004 are  estimated  to  total  $1.0  billion.  Total  coal  purchases,
including  transportation costs, for 1999, 1998 and 1997 were $312 million, $304
million,  and $267  million,  respectively.  The  Registrant  also has  existing
contracts  with  pipeline and natural gas  suppliers to provide,  transport  and
store natural gas for distribution and electric generation. Gas-related contract
cost commitments for 2000 through 2004 are estimated to total $54 million. Total
delivered natural gas costs were $54 million for 1999, $50 million for 1998, and
$64 million for 1997. The Registrant's nuclear fuel commitments for 2000 through
2004, including uranium  concentrates,  conversion,  enrichment and fabrication,
are  expected to total $73 million,  and are  expected to be financed  under the
nuclear fuel lease.  Nuclear fuel  expenditures for 1999, 1998 and 1997 were $22
million, $20 million and $35 million, respectively. Additionally, the Registrant
has long-term  contracts  with other  utilities to purchase  electric  capacity.
These  commitments  for 2000 through 2004 are  estimated to total $200  million.
During 1999, 1998 and 1997,  electric capacity  purchases were $38 million,  $35
million, and $34 million, respectively.

The Registrant's  insurance  coverage for Callaway Nuclear Plant at December 31,
1999, was as follows:

Type and Source of Coverage
- -------------------------------------------------------------------------------
(in millions)                                 Maximum             Maximum
                                            Coverages         Assessments
                                                               For Single
                                                                Incidents
- -------------------------------------------------------------------------------
Public Liability:
     American Nuclear Insurers                $ 200               $--
     Pool Participation                       9,338                88 (a)
- -------------------------------------------------------------------------------
                                            $ 9,538 (b)          $ 88
- -------------------------------------------------------------------------------
Nuclear Worker Liability:
     American Nuclear Insurers                $ 200 (c)           $ 3
- -------------------------------------------------------------------------------
Property Damage:
     Nuclear Electric Insurance Ltd.        $ 2,750 (d)          $ 11
- -------------------------------------------------------------------------------
Replacement Power:
     Nuclear Electric Insurance Ltd.          $ 490 (e)            $2
- -------------------------------------------------------------------------------
(a)  Retrospective premium under the Price-Anderson  liability provisions of the
     Atomic  Energy  Act of 1954,  as  amended,  (Price-  Anderson).  Subject to
     retrospective  assessment with respect to loss from an incident at any U.S.
     reactor, payable at $10 million per year. Price-Anderson expires in 2002.
(b)  Limit of liability for each incident under Price-Anderson.
(c)  Industry limit for potential  liability from workers  claiming  exposure to
     the hazard of nuclear radiation.
(d)  Includes premature decommissioning costs.
(e)  Weekly  indemnity of $3.5 million,  for 52 weeks which  commences after the
     first 12 weeks of an  outage,  plus  $2.8  million  per week for 110  weeks
     thereafter.
- --------------------------------------------------------------------------------

Price-Anderson  limits the liability  for claims from an incident  involving any
licensed  U.S.  nuclear  facility.  The limit is based on the number of licensed
reactors and is adjusted at least every five years based on the  Consumer  Price
Index.  Utilities  owning a  nuclear  reactor  cover  this  exposure  through  a
combination  of private  insurance  and mandatory  participation  in a financial
protection pool as established by Price-Anderson.

If losses from a nuclear  incident at Callaway  exceed the limits of, or are not
subject to,  insurance,  or if coverage is not available,  the  Registrant  will
self-insure  the risk.  Although the  Registrant  has no reason to  anticipate a
serious  nuclear  incident,  if one did  occur it  could  have a  material,  but
indeterminable,  adverse effect on the Registrant's financial position,  results
of operations or liquidity.

Title IV of the Clean Air Act  Amendments  of 1990  requires the  Registrant  to
significantly  reduce total annual sulfur dioxide (SO2) and nitrogen oxide (NOx)
emissions by the year 2000.  By switching to low-sulfur  coal,  early banking of
emission credits and installing  advanced NOx reduction  combustion  technology,
the Registrant is meeting these requirements.

                                      -34-

<PAGE>

In July 1997,  the United States  Environmental  Protection  Agency (EPA) issued
regulations  revising the National  Ambient Air Quality  Standards for ozone and
particulate  matter.  In May 1999, the U.S. Court of Appeals for the District of
Columbia  remanded  the  regulations  back  to the EPA  for  review.  Litigation
regarding  appeals of these  regulations is ongoing.  New ambient  standards may
result in  significant  additional  reductions in SO2 and NOx emissions from the
Registrant's  power plants by 2007.  At this time,  the  Registrant is unable to
predict the ultimate impact of these revised air quality standards on its future
financial condition, results of operations or liquidity.

In an attempt to lower ozone levels across the eastern  United  States,  the EPA
issued  the  implementation  of  regulations  in  September  1998 to reduce  NOx
emissions  from  coal-fired  boilers and other  sources in 22 states,  including
Missouri  (where all of the  Registrant's  coal-fired  power  plant  boilers are
located).  The proposed  regulations mandate a 75% reduction from 1990 levels by
the year 2003 and require  states to develop  plans to reduce NOx  emissions  to
help  alleviate  ozone  problem  areas.  The NOx  emissions  reductions  already
achieved on several of the  Registrant's  coal-fired  power  plants will help to
reduce the costs of  compliance  with these  regulations.  However,  preliminary
analysis  of  the  regulations   indicate  that  selective  catalytic  reduction
technology may be required for some of the Registrant's  units, as well as other
additional controls.

In  March  2000,  the  U.S.  Court  of  Appeals  for the  District  of  Columbia
substantially  upheld the proposed NOx regulations but remanded portions of them
to the EPA for further consideration. The implementation date of the regulations
is uncertain and further legal challenge is possible. Assuming an implementation
date of 2003, the  Registrant  currently  estimates that its additional  capital
expenditures  to comply  with the final NOx  regulations  could  range from $125
million to $150 million.  Associated  operations  and  maintenance  expenditures
could  increase  $5 million  to $8  million  annually,  beginning  in 2003.  The
Registrant is exploring  alternatives  to comply with these new  regulations  in
order to  minimize,  to the extent  possible,  its capital  costs and  operating
expenses. The Registrant is unable to predict the outcome of the litigation, the
regulation  implementation date or the ultimate impact of these standards on its
future financial condition, results of operations or liquidity.

In November  1998,  the United  States signed an agreement  with numerous  other
countries (the Kyoto  Protocol)  containing  certain  environmental  provisions,
which would require  decreases in  greenhouse  gases in an effort to address the
"global  warming" issue.  The Kyoto Protocol has not been ratified by the United
States  Senate.  Implementation  of the Kyoto Protocol in its present form would
likely  result  in  significantly   higher  capital  costs  and  operations  and
maintenance  expenses by the Registrant.  At this time, the Registrant is unable
to determine the impact of these proposals on the Registrant's  future financial
condition, results of operations or liquidity.

As of  December  31,  1999,  the  Registrant  was  designated  as a  potentially
responsible party (PRP) by federal and state  environmental  protection agencies
at four hazardous waste sites.  Other hazardous waste sites have been identified
for which the Registrant may be responsible but has not been designated a PRP.

Costs  relating to studies and  remediation at a former  manufactured  gas plant
site located in Illinois are being  accrued and  deferred  rather than  expensed
currently,  pending recovery through environmental adjustment clause rate riders
approved by the ICC. The ICC has instituted reconciliation proceedings to review
the Registrant's  environmental  remediation activities to determine whether the
revenues collected from customers under its environmental adjustment clause rate
riders  were  consistent  with the amount of  remediation  costs  prudently  and
properly  incurred.  Amounts found to have been  incorrectly  included under the
riders would be subject to refund. Rulings from the ICC are pending with respect
to these proceedings  applicable to the years 1997 and 1998. The  reconciliation
proceedings   relating  to  the  Registrant's  1999  environmental   remediation
activities will commence by the ICC in 2000.

The Registrant  continually  reviews  remediation costs that may be required for
all of its hazardous waste sites.  Any unrecovered  environmental  costs are not
expected  to  have a  material  adverse  effect  on the  Registrant's  financial
position, results of operations or liquidity.

Certain  employees  of the  Registrant  are  represented  by  the  International
Brotherhood  of  Electrical  Workers  (IBEW)  and  the  International  Union  of
Operating  Engineers.   These  employees  comprise   approximately  77%  of  the
Registrant's   workforce.   New  contracts  with  collective   bargaining  units
representing  approximately  46% of these  employees  were ratified in 1999 with
terms  expiring in 2002.  Labor  agreements  which expired in 1999 have not been
renewed with IBEW Locals 1439,  309, 649 and 1455,  who  collectively  represent
approximately  2,000  employees of the Registrant and Ameren  Services  Company.
Negotiations  with Local 1455 are still  ongoing.  However,  after  engaging  in
extensive  good-faith  bargaining  with  IBEW  Locals  1439,  309 and  649,  the
Registrant submitted a last, best and final offer to these collective bargaining
units on February 2, 2000.  The offer was rejected and the  Registrant  informed
these  locals  that it would  implement  the  noneconomic  portion  of its offer
effective  March  6,  2000.  The  employees  are  currently  working  under  the
noneconomic  portion  of the  Registrant's  last,  best  and  final  offer.  The
Registrant is unable to predict what further  action,  if any, these  collective
bargaining  units will take or the

                                      -35-

<PAGE>

response of the Registrant's other union represented  employees to any action by
its employees.  The Registrant is also unable to determine  what, if any, impact
these labor matters  could have on its future  financial  condition,  results of
operations or liquidity.

Regulatory  changes enacted and being considered at the federal and state levels
continue to change the structure of the utility industry and utility regulation,
as well as encourage  increased  competition.  At this time,  the  Registrant is
unable  to  predict  the  impact of these  changes  on the  Registrant's  future
financial condition, results of operations or liquidity. See Note 2 - Regulatory
Matters for further information.

The Registrant is involved in other legal and administrative  proceedings before
various  courts and  agencies  with  respect to matters  arising in the ordinary
course of business,  some of which involve substantial  amounts.  The Registrant
believes  that  the  final  disposition  of  these  proceedings  will not have a
material  adverse  effect on its  financial  position,  results of operations or
liquidity.

NOTE 13 - Callaway Nuclear Plant

Under the Nuclear  Waste Policy Act of 1982,  the  Department of Energy (DOE) is
responsible  for the permanent  storage and disposal of spent nuclear fuel.  The
DOE  currently  charges  one mill per  nuclear-generated  kilowatthour  sold for
future disposal of spent fuel.  Electric rates charged to customers  provide for
recovery of such costs.  The DOE is not expected to have its  permanent  storage
facility  for spent fuel  available  until at least  2015.  The  Registrant  has
sufficient  storage  capacity at the Callaway  Plant site until 2020 and has the
capability  for  additional  storage  capacity  through the licensed life of the
plant. The delayed  availability of the DOE's disposal  facility is not expected
to adversely affect the continued operation of the Callaway Plant.

Electric  rates  charged to  customers  provide for  recovery of Callaway  Plant
decommissioning  costs over the life of the plant,  based on an assumed  40-year
life,  ending with  expiration  of the plant's  operating  license in 2024.  The
Callaway  site is  assumed  to be  decommissioned  using  the  DECON  (immediate
dismantlement)  method.   Decommissioning   costs,  including   decontamination,
dismantling  and site  restoration,  are estimated to be $509 million in current
year dollars and are expected to escalate  approximately 4% per year through the
end of decommissioning  activity in 2033.  Decommissioning  costs are charged to
depreciation  expense over Callaway's service life and amounted to approximately
$7 million in each of the years  1999,  1998 and 1997.  Every three  years,  the
MoPSC  and  ICC  require  the  Registrant  to  file  updated  cost  studies  for
decommissioning  Callaway,  and electric  rates may be adjusted at such times to
reflect  changed  estimates.  The  latest  studies  were  filed in  1999.  Costs
collected  from customers are deposited in an external trust fund to provide for
Callaway's decommissioning.  Fund earnings are expected to average approximately
9% annually through the date of decommissioning.  If the assumed return on trust
assets is not earned,  the  Registrant  believes  it is  probable  that any such
earnings  deficiency  will be recovered in rates.  Trust fund  earnings,  net of
expenses,   appear  on  the   balance   sheet  as   increases   in  the  nuclear
decommissioning  trust  fund  and  in  the  accumulated  provision  for  nuclear
decommissioning.

The staff of the SEC has questioned certain current accounting  practices of the
electric  utility   industry,   regarding  the   recognition,   measurement  and
classification of decommissioning  costs for nuclear generating  stations in the
financial statements of electric utilities. In response to these questions,  the
Financial  Accounting  Standards  Board has agreed to review the  accounting for
removal costs,  including  decommissioning.  The Registrant does not expect that
changes in the accounting for nuclear decommissioning costs will have a material
effect on its financial position, results of operations or liquidity.

NOTE 14 - Fair Value of Financial Instruments

The following  methods and  assumptions  were used to estimate the fair value of
each class of financial instruments for which it is practicable to estimate that
value:

Cash and Temporary Investments/Short-Term Borrowings
The carrying amounts  approximate fair value because of the short-term  maturity
of these instruments.

Nuclear Decommissioning Trust Fund
The fair value is estimated based on quoted market prices for securities.

Preferred Stock
The fair value is estimated  based on the quoted  market  prices for the same or
similar issues.

                                      -36-

<PAGE>

Long-Term Debt
The fair  value is  estimated  based on the  quoted  market  prices  for same or
similar  issues or on the current  rates offered to the  Registrant  for debt of
comparable maturities.

Derivative Financial Instruments
Market prices used to determine fair value are based on management's  estimates,
which  take  into   consideration   factors   like  closing   exchange   prices,
over-the-counter prices, time value of money and volatility factors.

Carrying  amounts  and  estimated  fair  values  of the  Registrant's  financial
instruments at December 31:
                                                     1999              1998
- --------------------------------------------------------------------------------
(in millions)                                 Carrying    Fair  Carrying   Fair
                                                Amount   Value    Amount  Value
- --------------------------------------------------------------------------------
Preferred stock                                   $155    $126     $155    $160
Long-term debt (including current portion)       1,894   1,872    1,791   1,919
- --------------------------------------------------------------------------------

The Registrant has  investments in debt and equity  securities  that are held in
trust funds for the purpose of funding the nuclear  decommissioning  of Callaway
Nuclear  Plant  (see Note 13 -  Callaway  Nuclear  Plant).  The  Registrant  has
classified these investments in debt and equity securities as available for sale
and has recorded all such investments at their fair market value at December 31,
1999 and 1998. In 1999, 1998 and 1997, the proceeds from the sale of investments
were $83 million, $29 million and $24 million, respectively.  Using the specific
identification method to determine cost, the gross realized gains on those sales
were  approximately $11 million for 1999, and $2 million for both 1998 and 1997.
Net realized and  unrealized  gains and losses are reflected in the  accumulated
provision for nuclear  decommissioning on the balance sheet, which is consistent
with the method used by the Registrant to account for the decommissioning  costs
recovered in rates.

Costs and fair  values  of  investments  in debt and  equity  securities  in the
nuclear decommissioning trust fund at December 31 were as follows:
- -------------------------------------------------------------------------------
1999 (in millions)                                Gross Unrealized
Security Type                   Cost        Gain        (Loss)    Fair Value
- -------------------------------------------------------------------------------
Debt Securities                  $67         $--         $--          $67
Equity Securities                 45          73          --          118
Cash equivalents                   2          --          --            2
- -------------------------------------------------------------------------------
                                $114         $73         $--         $187
- -------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
1998 (in millions)                                Gross Unrealized
Security Type                   Cost        Gain        (Loss)    Fair Value
- --------------------------------------------------------------------------------
Debt Securities                  $48          $4         $--          $52
Equity Securities                 46          62          --          108
Cash equivalents                   2          --          --            2
- --------------------------------------------------------------------------------
                                 $96         $66         $--         $162
- --------------------------------------------------------------------------------

The  contractual  maturities of investments  in debt  securities at December 31,
1999, were as follows:
- ---------------------------------------------------------------------------
(in millions)                                       Cost        Fair Value
- ---------------------------------------------------------------------------
1 year to 5 years                                     $6                $6
5 years to 10 years                                   30                30
Due after 10 years                                    31                31
- ---------------------------------------------------------------------------
                                                     $67               $67
- ---------------------------------------------------------------------------

                                    PART III

ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.

     Any information  concerning  directors required to be reported by this item
is  included  under  "Item  (1):  Election  of  Directors"  in  AmerenUE's  2000
definitive  proxy statement filed pursuant to Regulation 14A and is incorporated
herein by reference.

     Information concerning executive officers required by this item is reported
in Part I of this Form 10-K.

                                      -37-

<PAGE>

ITEM 11.  EXECUTIVE COMPENSATION.

     Any  information  required to be  reported  by this item is included  under
"Compensation"  in AmerenUE's 2000 definitive  proxy statement filed pursuant to
Regulation 14A and is incorporated herein by reference.


ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.

     Any  information  required to be  reported  by this item is included  under
"Security Ownership of Management" in AmerenUE's 2000 definitive proxy statement
filed pursuant to Regulation 14A and is incorporated herein by reference.


ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.

     Any  information  required to be  reported  by this item is included  under
"Item (1):  Election of Directors" in AmerenUE's 2000 definitive proxy statement
filed pursuant to Regulation 14A and is incorporated herein by reference.

                                     PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS
               ON FORM 8-K.

     (a) The following documents are filed as a part of this report:

     1.  Financial Statements and Financial Statement Schedule Covered by
         Report of Independent Accountants

                                                                   Pages Herein

         Report of Independent Accountants.................................  17
         Balance Sheet - December 31, 1999 and 1998........................  18
         Statement of Income - Years 1999, 1998, and 1997..................  19
         Statement of Cash Flows - Years 1999, 1998, and 1997..............  20
         Statement of Retained Earnings - Years 1999, 1998, and 1997.......  21
         Notes to Financial Statements.....................................  22
         Valuation and Qualifying Accounts (Schedule II)
            Years 1999, 1998, and 1997.....................................  39


         Schedules  not  included  have been  omitted  because they are not
         applicable  or the  required  data is shown in the  aforementioned
         financial statements.


     2.  Exhibits:  See EXHIBITS beginning on Page 41

     (b) Reports  on Form 8-K.  The  Registrant  filed a report on Form 8-K
         dated  January 20,  2000  reporting  the  issuance of a Report and
         Order dated  December  23,  1999 by the  Missouri  Public  Service
         Commission   regarding  the  Registrant's   electric   alternative
         regulation plans.

                                      -38-

<PAGE>




                             UNION ELECTRIC COMPANY
                 SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
              FOR THE YEARS ENDED DECEMBER 31, 1999, 1998 AND 1997

<TABLE>
<CAPTION>


              Col. A                              Col. B                       Col. C                        Col. D         Col. E
              ------                               -----                       ------                        ------         ------

                                                                             Additions
                                                                   --------------------------------
                                                                      (1)              (2)
                                                  Balance at       Charged to                                           Balance at
                                                  beginning        costs and         Charged to                          end of
           Description                            of period         expenses       other accounts       Deductions       Period
           -----------                            ---------        ----------      --------------       ----------      ---------
                                                                                                         (Note)
<S>                                               <C>              <C>              <C>                 <C>             <C>
Year ended December 31, 1999

Reserves deducted in the balance sheet from
 assets to which they apply:

    Allowance for doubtful accounts               $6,678,422       $8,840,000                           $10,209,959     $5,308,463
                                                  ==========       ==========                           ===========     ==========




Year ended December 31, 1998

Reserves deducted in the balance sheet from
 assets to which they apply:

    Allowance for doubtful accounts               $3,645,328      $16,900,000                           $13,866,906     $6,678,422
                                                  ==========      ===========                           ===========     ==========




Year ended December 31, 1997

Reserves deducted in the balance sheet from
 assets to which they apply:

    Allowance for doubtful accounts               $5,195,332      $10,860,000                           $12,410,004     $3,645,328
                                                  ==========      ===========                           ===========     ==========

</TABLE>

Note:  Uncollectible accounts charged off, less recoveries.

                                      -39-

<PAGE>


                                   SIGNATURES

     Pursuant  to the  requirements  of  Section  13 or 15(d) 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.

                                             UNION ELECTRIC COMPANY
                                                  (Registrant)

                                             CHARLES W. MUELLER
                                                President and
                                             Chief Executive Officer

Date    March 29, 2000                        By   /s/ Steven R. Sullivan
     -------------------                         ------------------------
                                         (Steven R. Sullivan, Attorney-in-Fact)

     Pursuant to the  requirements of the Securities  Exchange Act of 1934, this
report  has  been  signed  below  by the  following  persons  on  behalf  of the
registrant and in the capacities and on the date indicated.

                Signature                                     Title

/s/ C. W. Mueller               President, Chief Executive Officer and Director
- ---------------------------                        (Principal Executive Officer)
CHARLES W. MUELLER

/s/ Donald E. Brandt                         Senior Vice President and Director
- ---------------------------                       (Principal Financial Officer)
DONALD E. BRANDT

/s/ Warner L. Baxter                    Vice President, Controller and Director
- ---------------------------                      (Principal Accounting Officer)
WARNER L. BAXTER

/s/ Paul A. Agathen                                                    Director
- ---------------------------
PAUL A. AGATHEN

/s/ Gary L. Rainwater                                                  Director
- ---------------------------
GARY L. RAINWATER



                            By  /s/ Steven R. Sullivan          March 29, 2000
                               ------------------------
                         (Steven R. Sullivan, Attorney-in Fact)

                                      -40-

<PAGE>



                                    EXHIBITS

                             Exhibits Filed Herewith

Exhibit No.                                    Description

12 - Statement  re  Computation  of Ratio of  Earnings  to Fixed  Charges and
      Preferred Stock Dividend Requirements.

24 - Powers of Attorney.

27 - Financial Data Schedule.


                                      -41-

<PAGE>



                       Exhibits Incorporated By Reference

     The following  exhibits  heretofore have been filed with the Securities and
Exchange  Commission  pursuant to requirements  of the Acts  administered by the
Commission. Such exhibits are identified by the references following the listing
of each such exhibit, and they are hereby incorporated herein by reference.

Exhibit No.                    Description

2    - Agreement  and Plan of Merger,  dated as of August 11, 1995, by and among
     Union Electric Company, CIPSCO Incorporated,  Ameren Corporation,  and Arch
     Merger Inc. (June 30, 1995 Form 10-Q/A (Amendment No. 1), Exhibit 2(a).)

3(i) - Restated  Articles of  Incorporation  of the  Company,  as filed with the
     Secretary  of State of the State of  Missouri.  (1993  Form  10-K,  Exhibit
     3(i).)

3(ii)- By-Laws of the  Company as amended  to August 26,  1999.  (September  30,
     1999 Form 10-Q, Exhibit 3(ii).)

4.1  - Order of the Securities and Exchange Commission dated October 16, 1945 in
     File No.  70-1154  permitting the issue of Preferred  Stock,  $3.70 Series.
     (Registration No. 2-27474, Exhibit 3-E.)

4.2  - Order of the Securities and Exchange  Commission  dated April 30, 1946 in
     File No.  70-1259  permitting the issue of Preferred  Stock,  $3.50 Series.
     (Registration No. 2-27474, Exhibit 3-F.)

4.3  - Order of the Securities and Exchange Commission dated October 20, 1949 in
     File No.  70-2227  permitting the issue of Preferred  Stock,  $4.00 Series.
     (Registration No. 2-27474, Exhibit 3-G.)

4.4  -  Indenture  of Mortgage  and Deed of Trust of the Company  dated June 15,
     1937, as amended May 1, 1941, and Second  Supplemental  Indenture dated May
     1, 1941. (Registration No. 2-4940, Exhibit B-1.)

4.5  - Supplemental Indentures to Mortgage

       Dated as of                File Reference                Exhibit No.
       -----------                --------------                -----------
      March 1, 1967              2-58274                             2.9
      April 1, 1971              Form 8-K, April 1971                6
      February 1, 1974           Form 8-K, February 1974             3
      July 7, 1980               2-69821                             4.6
      May 1, 1990                Form 10-K, 1990                     4.6
      December 1, 1991           33-45008                            4.4
      December 4, 1991           33-45008                            4.5
      January 1, 1992            Form 10-K, 1991                     4.6
      October 1, 1992            Form 10-K, 1992                     4.6
      December 1, 1992           Form 10-K, 1992                     4.7
      February 1, 1993           Form 10-K, 1992                     4.8
      May 1, 1993                Form 10-K, 1993                     4.6
      August 1, 1993             Form 10-K, 1993                     4.7
      October 1, 1993            Form 10-K, 1993                     4.8
      January 1, 1994            Form 10-K, 1993                     4.9
      December 1, 1996           Form 10-K, 1996                     4.36

                                      -42-

<PAGE>

Exhibit No.                    Description

4.6  - Series A  Agreement  of Sale dated as of June 1, 1984  between  the State
     Environmental  Improvement and Energy  Resources  Authority of the State of
     Missouri and the Company,  together with Letter of Credit and Reimbursement
     Agreement dated as of June 1, 1984 between  Citibank,  N.A. and the Company
     and Series A Trust Indenture dated as of June 1, 1984 between the Authority
     and   Mercantile   Trust   Company   National   Association,   as  trustee.
     (Registration No. 2-96198, Exhibit 4.25.)

4.7  -  Reimbursement  Agreement  dated as of April 21,  1992  among  Swiss Bank
     Corporation, various financial institutions, and the Company, providing for
     an  alternate  letter of credit to serve as a source of  payment  for bonds
     issued under the Series A Trust Indenture  dated as of June 1, 1984.  (1992
     Form 10-K, Exhibit 4.23.)

4.8  - Series B  Agreement  of Sale dated as of June 1, 1984  between  the State
     Environmental  Improvement and Energy  Resources  Authority of the State of
     Missouri and the Company, together with Reimbursement Agreement dated as of
     June 1, 1984  between  Chemical  Bank and the  Company  and  Series B Trust
     Indenture  dated as of June 1, 1984 between the  Authority  and  Mercantile
     Trust Company National Association, as trustee.  (Registration No. 2-96198,
     Exhibit 4.26.)

4.9  - Reimbursement  Agreement dated as of April 22, 1988 between Union Bank of
     Switzerland and the Company, providing for an alternate letter of credit to
     serve as a source of  payment  for bonds  issued  under the  Series B Trust
     Indenture dated as of June 1, 1984. (June 30, 1988 Form 10-Q, Exhibit 4.2.)

4.10 -  Amendment  and  Extension  Agreement  dated  as of June  1,  1990 to the
     Reimbursement  Agreement  dated as of April 22, 1988 between  Union Bank of
     Switzerland and the Company. (1990 Form 10-K, Exhibit 4.29.)

4.11 - Amendment and Extension Agreement dated as of June 1, 1991 to the amended
     Reimbursement  Agreement  dated as of April 22, 1988 between  Union Bank of
     Switzerland and the Company. (1992 Form 10-K, Exhibit 4.27.)

4.12 - Amendment Agreement dated as of June 1, 1992 to the amended Reimbursement
     Agreement  dated as of April 22, 1988 between Union Bank of Switzerland and
     the Company. (1992 Form 10-K, Exhibit 4.28.)

4.13 - Series 1985 A Reaffirmation  Agreement and Second Supplement to Agreement
     of  Sale  dated  as  of  June  1,  1985  between  the  State  Environmental
     Improvement and Energy Resources Authority of the State of Missouri and the
     Company,  together with Series 1985 A  Reimbursement  Agreement dated as of
     June 1, 1985 between Union Bank of  Switzerland  and the Company and Series
     1985 A Trust  Indenture  dated as of June 1, 1985 between the Authority and
     Mercantile  Trust  Company  National  Association,  as  trustee  and  Texas
     Commerce  Bank National  Association,  as  co-trustee.  (June 30, 1985 Form
     10-Q, Exhibit 4.1.)

4.14 - Amendment and Extension  Agreement  dated as of June 1, 1988 revising the
     Reimbursement  Agreement  dated as of June 1, 1985  between  Union  Bank of
     Switzerland and the Company. (June 30, 1988 Form 10-Q, Exhibit 4.4.)

4.15 - Amendment and Extension  Agreement  dated as of June 1, 1990 revising the
     Reimbursement Agreement dated as of June 1, 1985, as amended, between Union
     Bank of Switzerland and the Company. (1990 Form 10-K, Exhibit 4.37.)

                                      -43-

<PAGE>

Exhibit No.                    Description

4.16 - Amendment and Extension Agreement dated as of June 1, 1991 to the amended
     Reimbursement  Agreement  dated as of June 1, 1985  between  Union  Bank of
     Switzerland and the Company. (1992 Form 10-K, Exhibit 4.32.)

4.17 - Amendment Agreement dated as of June 1, 1992 to the amended Reimbursement
     Agreement  dated as of June 1, 1985 between Union Bank of  Switzerland  and
     the Company. (1992 Form 10-K, Exhibit 4.33.)

4.18 - Series 1985 B Reaffirmation  Agreement and Third  Supplement to Agreement
     of  Sale  dated  as  of  June  1,  1985  between  the  State  Environmental
     Improvement and Energy Resources Authority of the State of Missouri and the
     Company,  together with Series 1985 B  Reimbursement  Agreement dated as of
     June 1, 1985 between The  Long-term  Credit Bank of Japan,  Limited and the
     Company and Series 1985 B Trust  Indenture dated as of June 1, 1985 between
     the Authority and Mercantile Trust Company National Association, as trustee
     and Texas Commerce Bank National Association, as co-trustee. (June 30, 1985
     Form 10-Q, Exhibit 4.2.)

4.19 - Reimbursement Agreement dated as of February 1, 1993 between Westdeutsche
     Landesbank Girozentrale and the Company,  providing for an alternate letter
     of credit to serve as a source of payment for bonds issued under the Series
     1985 B Trust Indenture dated as of June 1, 1985.  (1992 Form 10-K,  Exhibit
     4.35.)

4.20 - Loan  Agreement  dated as of May 1, 1990 between the State  Environmental
     Improvement and Energy Resources Authority of the State of Missouri and the
     Company,  together with  Indenture of Trust dated as of May 1, 1990 between
     the Authority and  Mercantile  Bank of St. Louis,  N.A., as trustee.  (1990
     Form 10-K, Exhibit 4.40.)

4.21 -  Loan  Agreement   dated  as  of  December  1,  1991  between  the  State
     Environmental  Improvement and Energy Resources  Authority and the Company,
     together  with  Indenture of Trust dated as of December 1, 1991 between the
     Authority and Mercantile  Bank of St. Louis,  N.A., as trustee.  (1992 Form
     10-K, Exhibit 4.37.)

4.22 -  Loan  Agreement  dated  as  of  December  1,  1992,  between  the  State
     Environmental  Improvement and Energy Resources  Authority and the Company,
     together  with  Indenture of Trust dated as of December 1, 1992 between the
     Authority and Mercantile  Bank of St. Louis,  N.A., as trustee.  (1992 Form
     10-K, Exhibit 4.38.)

4.23 - Fuel Lease dated as of February 24, 1981 between the Company,  as lessee,
     and Gateway Fuel Company,  as lessor,  covering  nuclear  fuel.  (1980 Form
     10-K, Exhibit 10.20.)

4.24 -  Amendments  to Fuel Lease dated as of May 8, 1984 and October 15,  1984,
     respectively,  between the Company, as lessee, and Gateway Fuel Company, as
     lessor, covering nuclear fuel. (Registration No. 2-96198, Exhibit 4.28.)

4.25 - Amendment to Fuel Lease dated as of October 15, 1986 between the Company,
     as lessee,  and Gateway Fuel  Company,  as lessor,  covering  nuclear fuel.
     (September 30, 1986 Form 10-Q, Exhibit 4.3.)

4.26 - Credit  Agreement dated as of August 15, 1989 among the Company,  Certain
     Lenders,  The First  National  Bank of  Chicago,  as Agent  and Swiss  Bank
     Corporation,  Chicago Branch,  as Co-Agent.  (September 30, 1989 Form 10-Q,
     Exhibit 4.)

                                      -44-

<PAGE>

 Exhibit No.                   Description

4.27 - Series  1998A Loan  Agreement  dated as of  September 1, 1998 between The
     State Environmental Improvement and Energy Resources Authority of the State
     of Missouri and the Company. (September 30, 1998 Form 10-Q, Exhibit 4.28.)

4.28 - Series  1998B Loan  Agreement  dated as of  September 1, 1998 between The
     State Environmental Improvement and Energy Resources Authority of the State
     of Missouri and the Company. (September 30, 1998 Form 10-Q, Exhibit 4.29.)

4.29 - Series  1998C Loan  Agreement  dated as of  September 1, 1998 between The
     State Environmental Improvement and Energy Resources Authority of the State
     of Missouri and the Company. (September 30, 1998 Form 10-Q, Exhibit 4.30.)

10.1 - Ameren  Long-Term  Incentive  Plan of 1998.  (Ameren's  1998  Form  10-K,
     Exhibit 10.1.)

10.2 - Ameren  Change of  Control  Severance  Plan.  (Ameren's  1998 Form  10-K,
     Exhibit 10.2.)

10.3 - Ameren Deferred  Compensation  Plan for Members of the Ameren  Leadership
     Team. (Ameren's 1998 Form 10-K, Exhibit 10.3.)

10.4 - Ameren Deferred  Compensation Plan for Members of the Board of Directors.
     (Ameren's 1998 Form 10-K, Exhibit 10.4.)

Note:Reports of the  Company  on Forms  8-K,  10-Q and 10-K are on file with the
     SEC under File Number 1-2967.

     Reports of Ameren on Form 10-K are on file with the SEC under File  Number
     1-14756.

                                      -45-






                             UNION ELECTRIC COMPANY
 COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDENDS

<TABLE>
<CAPTION>

                                          Year Ended December 31,
                                        -----------------------------------------------------------------------

                                                1995         1996         1997         1998         1999

                                           Thousands of Dollars Except Ratios


<S>                                            <C>          <C>          <C>          <C>          <C>
Net Income                                     $314,107     $304,876     $301,655     $320,070     $349,252
Add- Extraordinary items net of tax                --           --         26,967         --           --
                                              ----------   ----------   ----------   ----------   ----------
Net Income from continuing operations           314,107      304,876      328,622      320,070      349,252

                                              ----------   ----------   ----------   ----------   ----------
   Taxes based on income                        207,734      196,210      199,763      212,554      226,696
                                              ----------   ----------   ----------   ----------   ----------

Net income before income taxes                  521,841      501,086      528,385      532,624      575,948
                                              ----------   ----------   ----------   ----------   ----------



Add- fixed charges:
   Interest on long term debt                   121,738      120,547      125,705      124,766      117,899
   Other interest                                 7,501        7,828        9,299        1,660       (1,342)
   Rentals                                        3,330        3,458        3,727        3,416        3,899
   Amortization of net debt premium, discount,
      expenses and losses                         5,502        4,269        3,672        3,522        3,421

                                              ----------   ----------   ----------   ----------   ----------
Total fixed charges                             138,071      136,102      142,403      133,364      123,877
                                              ----------   ----------   ----------   ----------   ----------

Earnings available for fixed charges            659,912      637,188      670,788      665,988      699,825
                                              ==========   ==========   ==========   ==========   ==========

Ratio of earnings to fixed charges                 4.78         4.68         4.71         4.99         5.64
                                              ==========   ==========   ==========   ==========   ==========


Earnings required for preferred dividends:
   Preferred stock dividends                     13,250       13,249        8,817        8,817        8,817
   Adjustment to pre-tax basis                    7,558        7,363        4,257        4,649        4,544
                                              ----------   ----------   ----------   ----------   ----------
                                                 20,808       20,612       13,074       13,466       13,361

Fixed charges plus preferred stock dividend
    requirements                                158,879      156,714      155,477      146,830      137,238
                                              ==========   ==========   ==========   ==========   ==========

Ratio of earnings to fixed charges plus
    preferred stock dividend requirements          4.15         4.06         4.31         4.53         5.09
                                              ==========   ==========   ==========   ==========   ==========

</TABLE>



                                                                     Exhibit 24
                                POWER OF ATTORNEY

     WHEREAS, UNION ELECTRIC COMPANY, a Missouri corporation (herein referred to
as the  "Company"),  is  required  to file  with  the  Securities  and  Exchange
Commission,  under the  provisions  of the  Securities  Exchange Act of 1934, as
amended,  its annual  report on Form 10-K for the year ended  December 31, 1999;
and

     WHEREAS,  each of the below  undersigned holds the office or offices in the
Company set opposite his name;

     NOW,  THEREFORE,  each of the undersigned  hereby  constitutes and appoints
Charles W. Mueller  and/or  Donald E. Brandt  and/or Steven R. Sullivan the true
and lawful attorneys-in-fact of the undersigned,  for and in the name, place and
stead of the undersigned, to affix the name of the undersigned to said Form 10-K
and any amendments thereto, and, for the performance of the same acts, each with
power to appoint in their place and stead and as their  substitute,  one or more
attorneys-in-fact  for the  undersigned,  with full power of revocation;  hereby
ratifying  and  confirming  all that  said  attorneys-in-fact  may do by  virtue
hereof.

     IN WITNESS WHEREOF, the undersigned have hereunto set their hands this 10th
day of February 2000:

Charles W. Mueller, President, Chief
       Executive Officer and Director
       (Principal Executive Officer)               /S/ Charles W. Mueller
                                                  ------------------------

Paul A. Agathen, Director                          /S/ Paul A. Agathen
                                                  ------------------------

Warner L. Baxter, Vice President,
       Controller and Director
       (Principal Accounting Officer)              /S/ Warner L. Baxter
                                                  ------------------------

Donald E. Brandt, Senior Vice
       President and Director
       (Principal Financial Officer)               /S/ Donald E. Brandt
                                                  ------------------------

Gary L. Rainwater, Director                        /S/ Gary L. Rainwater
                                                  ------------------------



STATE OF MISSOURI        )
                         )  SS.
CITY OF ST. LOUIS        )

     On this 10th day of  February,  2000,  before  me, the  undersigned  Notary
Public in and for said State,  personally appeared the above-named  officers and
directors of Union Electric Company,  known to me to be the persons described in
and who executed the  foregoing  power of attorney and  acknowledged  to me that
they  executed  the same as their  free  act and deed for the  purposes  therein
stated.

     IN TESTIMONY  WHEREOF,  I have hereunto set my hand and affixed my official
seal.



                                                    /S/ K. A. Bell
                                                 ------------------------
                                                      K. A. BELL
                                              Notary Public - Notary Seal
                                                   STATE OF MISSOURI
                                                   St. Louis County
                                        My Commission Expires:  October 13, 2002


WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>



                                                                     Exhibit 27

                             UNION ELECTRIC COMPANY
                             10-K DECEMBER 31, 1999
                           FINANCIAL DATA SCHEDULE UT
          PUBLIC UTILITY COMPANIES AND PUBLIC UTILITY HOLDING COMPANIES
                  APPENDIX E TO ITEM 601 (C) OF REGULATION S-K
                             (Thousands of Dollars)

<ARTICLE> UT


<S>                                                 <C>
<PERIOD-TYPE>                                            12-MOS
<FISCAL-YEAR-END>                                   DEC-31-1999
<PERIOD-END>                                        DEC-31-1999
<BOOK-VALUE>                                           PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                             5,331,820
<OTHER-PROPERTY-AND-INVEST>                             186,760
<TOTAL-CURRENT-ASSETS>                                  707,841
<TOTAL-DEFERRED-CHARGES>                                 59,748
<OTHER-ASSETS>                                          757,393
<TOTAL-ASSETS>                                        7,043,562
<COMMON>                                                510,619
<CAPITAL-SURPLUS-PAID-IN>                               701,896
<RETAINED-EARNINGS>                                   1,221,167
<TOTAL-COMMON-STOCKHOLDERS-EQ>                        2,433,682
                                         0
                                             155,197
<LONG-TERM-DEBT-NET>                                  1,777,291
<SHORT-TERM-NOTES>                                            0
<LONG-TERM-NOTES-PAYABLE>                                     0
<COMMERCIAL-PAPER-OBLIGATIONS>                                0
<LONG-TERM-DEBT-CURRENT-PORT>                                 0
                                     0
<CAPITAL-LEASE-OBLIGATIONS>                             105,310
<LEASES-CURRENT>                                         11,423
<OTHER-ITEMS-CAPITAL-AND-LIAB>                        2,560,659
<TOT-CAPITALIZATION-AND-LIAB>                         7,043,562
<GROSS-OPERATING-REVENUE>                             2,527,166
<INCOME-TAX-EXPENSE>                                    230,691
<OTHER-OPERATING-EXPENSES>                            1,853,207
<TOTAL-OPERATING-EXPENSES>                            2,083,898
<OPERATING-INCOME-LOSS>                                 443,268
<OTHER-INCOME-NET>                                       18,818
<INCOME-BEFORE-INTEREST-EXPEN>                          462,086
<TOTAL-INTEREST-EXPENSE>                                112,834
<NET-INCOME>                                            349,252
                               8,817
<EARNINGS-AVAILABLE-FOR-COMM>                           340,435
<COMMON-STOCK-DIVIDENDS>                                328,674
<TOTAL-INTEREST-ON-BONDS>                               112,076
<CASH-FLOW-OPERATIONS>                                  724,963
<EPS-BASIC>                                                0.00  <F1>
<EPS-DILUTED>                                              0.00  <F1>

<FN>
<F1> Information not normally disclosed in financial statements and notes.
</FN>





</TABLE>


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