AMEREN CORP
10-Q, 2000-11-14
ELECTRIC & OTHER SERVICES COMBINED
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<PAGE>

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549


                                    FORM 10-Q

[X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
    ACT OF 1934

    For Quarterly Period Ended September 30, 2000

[ ] 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 1-14756.

                               AMEREN CORPORATION
             (Exact name of registrant as specified in its charter)

                     Missouri                                   43-1723446
(State or other jurisdiction of                              (I.R.S. Employer
incorporation or organization)                              Identification No.)


                 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


         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          .
                       -----------           ----------


Shares outstanding of each of registrant's classes of common stock as of October
    31, 2000: Common Stock, $ .01 par value - 137,215,462


<PAGE>




                               Ameren Corporation

                                      Index

                                                                      Page No.

Part I    Consolidated Financial Information (Unaudited)

          Management's Discussion and Analysis                           2

          Quantitative and Qualitative Disclosures
          About Market Risk                                              7

          Consolidated Balance Sheet
          - September 30, 2000 and December 31, 1999                     9

          Consolidated Statement of Income
          - Three months, nine months and 12 months ended
             September 30, 2000 and 1999                                10

          Consolidated Statement of Cash Flows
          -  Nine months ended September 30, 2000 and 1999              11

          Notes to Consolidated Financial Statements                    12


Part II    Other Information                                            15


<PAGE>





             PART I. CONSOLIDATED FINANCIAL INFORMATION (UNAUDITED)

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS

OVERVIEW

Ameren  Corporation  (Ameren) is a holding company  registered  under the Public
Utility  Holding Company Act of 1935 (PUHCA).  In December 1997,  Union Electric
Company  (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).  As a result of the  Merger,  Ameren has a 60%  ownership
interest in Electric  Energy,  Inc.  (EEI).  That interest is  consolidated  for
financial reporting purposes.  Since the Merger, Ameren has formed AmerenEnergy,
Inc. (AmerenEnergy), Ameren Development Company, AmerenEnergy Resources Company,
and Ameren  Services  Company.  AmerenEnergy,  an energy  marketing  subsidiary,
primarily  serves  as  a  power  marketing  agent  for  the  operating   utility
subsidiaries  and  provides a range of energy and risk  management  services  to
targeted  customers.  Ameren  Development  Company is a nonregulated  subsidiary
encompassing Ameren's nonregulated products and services. AmerenEnergy Resources
Company  holds  the  Registrant's   nonregulated   generating   operations  (see
discussion  below under  "Electric  Industry  Restructuring").  Ameren  Services
Company provides shared support services to Ameren and all of its subsidiaries.

The following  discussion and analysis  should be read in  conjunction  with the
Notes  to  Consolidated  Financial  Statements  beginning  on page  12,  and the
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operations (MD&A), the Audited  Consolidated  Financial Statements and the Notes
to Consolidated  Financial  Statements appearing in the Registrant's 1999 Annual
Report to Stockholders  (which are incorporated by reference in the Registrant's
1999 Form 10-K).

References to the Registrant are to Ameren on a consolidated basis;  however, in
certain  circumstances,  the subsidiaries are separately referred to in order to
distinguish between their different business activities.

RESULTS OF OPERATIONS

Earnings
Third quarter 2000 earnings of $256  million,  or $1.87 per share,  increased $6
million, or 5 cents per share, from 1999's third quarter earnings.  Earnings for
the nine months ended  September 30, 2000,  totaled $431  million,  or $3.14 per
share,  compared to the  year-ago  earnings of $391  million or $2.85 per share.
Earnings for the 12 months ended September 30, 2000, were $426 million, or $3.10
per share,  compared  to $417  million,  or $3.04 per share,  for the  preceding
12-month period.

Earnings and earnings per share  fluctuated due to many  conditions,  primarily:
sales growth, weather variations,  credits to electric customers,  electric rate
reductions,  competitive market forces,  fluctuating  operating costs (including
Callaway Nuclear Plant refueling outages),  changes in interest expense, changes
in income and property taxes, and non-recurring  charges for a targeted employee
separation plan and for coal contract termination payments.

Based on the Company's  earnings results for the nine months ended September 30,
2000,  the Company now  estimates  that  earnings  per share for the year ending
December 31, 2000 will range between $3.25 and $3.35.  In addition,  the Company
estimates  that  earnings  per share for the year ending  December 31, 2001 will
range between $3.30 and $3.45.

The  significant  items  affecting  revenues,  costs  and  earnings  during  the
three-month,  nine-month and 12-month  periods ended September 30, 2000 and 1999
are detailed on the following pages.

                                       -2-

<PAGE>

Electric Operations

Electric Operating Revenues      Variations for periods ended September 30, 2000
                                         from comparable prior-year periods
--------------------------------------------------------------------------------
(Millions of Dollars)          Three Months      Nine Months     Twelve Months
                               ------------      -----------     -------------
--------------------------------------------------------------------------------
Rate variations                  $  -               $   -           $   7
Credit to customers               (10)                 (5)            (13)
Effect of abnormal weather        (22)                (40)            (43)
Growth and other                   45                 123             147
Interchange sales                 (22)                 74              92
EEI                                 7                   1              12
--------------------------------------------------------------------------------
                                $  (2)              $ 153           $ 202
--------------------------------------------------------------------------------


The $2 million  decrease  in third  quarter  electric  revenues  compared to the
year-ago quarter was primarily driven by an increase in the estimated credits to
Missouri  electric  customers (see Note 5 under Notes to Consolidated  Financial
Statements  for  further  information)  offset in part by an  increase  in total
kilowatthour  sales of 1 percent.  During the third quarter of 2000,  commercial
sales increased 7 percent,  while  residential and industrial  sales decreased 1
percent and 4 percent,  respectively.  In addition,  wholesale  and  interchange
sales rose 50 percent and 3 percent, respectively.

Electric  revenues  for the first nine  months of 2000  increased  $153  million
compared to the  prior-year  period,  primarily  due to a 7 percent  increase in
total  kilowatthour  sales. This increase was primarily driven by an increase in
interchange sales due to strong marketing efforts.  In addition,  commercial and
wholesale sales rose 6 percent and 53 percent,  respectively,  while residential
and  industrial  sales  remained flat during the period.  These  increases  were
offset in part by an increase  in the  estimated  credits to  Missouri  electric
customers  (see Note 5 under  Notes to  Consolidated  Financial  Statements  for
further information).

Electric  revenues for the 12 months ended  September  30, 2000  increased  $202
million  compared to the prior  12-month  period.  The  increase in revenues was
primarily driven by increased  interchange sales due to strong marketing efforts
as well as higher  commercial and wholesale  sales.  This increase was partially
offset by an increase in the  estimated  credit to Missouri  electric  customers
(see  Note 5 under  Notes  to  Consolidated  Financial  Statements  for  further
information).


Fuel and Purchased Power         Variations for periods ended September 30, 2000
                                        from comparable prior-year periods
--------------------------------------------------------------------------------
(Millions of Dollars)                   Three Months  Nine Months  Twelve Months
                                        ------------  -----------  -------------
--------------------------------------------------------------------------------
Fuel:
     Generation                          $    6       $   21          $  20
     Price                                   (8)         (23)           (16)
     Generation efficiencies and other       (4)         (11)           (19)
     Coal contract termination payments       -            -             52
Purchased power variation                   (20)          45             78
EEI variation                                16           20             32
--------------------------------------------------------------------------------
                                         $  (10)      $   52         $  147
--------------------------------------------------------------------------------

Fuel and  purchased  power  costs for the third  quarter  decreased  $10 million
versus the comparable  prior-year  period  primarily due to decreased  purchased
power and lower fuel prices, offset in part by increased generation.

Fuel and  purchased  power costs for the nine and 12 months ended  September 30,
2000  increased  $52 and  $147  million,  respectively,  versus  the  comparable
prior-year  period  primarily due to increased  generation and purchased  power,
resulting  from higher  sales  volume,  partially  offset by lower fuel  prices.
Additionally,  for the 12 months ended September 30, 2000, AmerenCIPS and two of
its coal suppliers  executed  agreements to terminate their existing coal supply
contracts  effective December 31, 1999 resulting in termination  payments of $52
million.  Total pretax fuel cost savings  expected to be realized  from the coal
contract  terminations  are  $183  million  ($131  million  net  of  termination
payments)  through 2010, with $66 million of pretax savings expected in the next
three years.

                                       -3-

<PAGE>

Gas Operations
Gas  revenues  for the three,  nine and  12-months  ended  September  30,  2000,
increased $7 million, $20 million and $27 million, respectively, compared to the
year-ago  periods  primarily  due to  increases  in retail  sales and gas costs,
coupled with an Illinois gas rate increase effective February 1999.

Gas costs for the three, nine and 12-months ended September 30, 2000,  increased
$7 million, $17 million and $28 million,  respectively,  primarily due to higher
sales and gas prices.

Other Operating Expenses
Other operating expense variations  reflected  recurring factors such as growth,
inflation, labor and benefit increases.

     Other  operations  expenses  decreased  $14  million for the three and nine
months ended September 30, 2000 compared to the prior-year periods primarily due
to lower  employee  benefits  in  2000,  resulting  from  changes  in  actuarial
assumptions,  lower professional  service expenses,  offset in part by increased
expenses associated with the automated meter reading roll-out.  Other operations
expenses  decreased $26 million for the 12-month period ended September 30, 2000
compared to the same  year-ago  period  primarily due to the  capitalization  of
certain costs  (including  computer  software  costs) that had  previously  been
expensed for the  Registrant's  Missouri  electric  operations based on an order
from the Missouri Public Service Commission in 1999.

Maintenance  expenses  for the nine and  12-months  ended  September  30,  2000,
increased  $16 million and $47 million,  respectively,  compared to the year-ago
periods  primarily  due to  increased  scheduled  power  plant  maintenance  and
tree-trimming activity.

Taxes
Income taxes  increased $27 million for the nine months ended September 30, 2000
due to higher pretax income.

Other Income and Deductions
The  variation in  miscellaneous,  net for the nine and 12-month  periods  ended
September 30, 2000, compared to the year-ago periods, was primarily due to prior
period write-offs of certain nonregulated investments.

Balance Sheet
The $80 million  increase in trade accounts  receivable and unbilled revenue was
due  primarily  to higher  revenues  in August and  September  2000  compared to
November and December 1999.

Short-term  debt increased $390 million  primarily for borrowings to finance the
acquisition  of new  combustion  turbine  generators.  See Liquidity and Capital
Resources below for further discussion.

Changes in accounts and wages payable and taxes accrued resulted from the timing
of various payments to taxing authorities and suppliers.

LIQUIDITY AND CAPITAL RESOURCES

Cash provided by operating  activities  totaled $762 million for the nine months
ended September 30, 2000, compared to $854 million during the same 1999 period.

Cash flows used in  investing  activities  totaled $633 million and $327 million
for  the  nine  months  ended   September  30,  2000  and  1999,   respectively.
Construction  expenditures  for the nine months ended  September  30, 2000,  for
constructing  new or improving  existing  facilities  were $658  million,  which
included  expenditures  associated  with  the  purchase  of  combustion  turbine
generators  (see Note 6 under Notes to  Consolidated  Financial  Statements  for
further information).  In addition,  the Registrant expended $12 million for the
acquisition of nuclear fuel. The Registrant received Board of Directors approval
on April 25, 2000 to spend  approximately  $160 million on capital  expenditures
relating to the  replacement  of four steam  generators at its Callaway  Nuclear
Plant.  Installation  is  scheduled  to be  completed  in 2005.  The  impact  on
anticipated 2000 capital expenditures will be insignificant.

Cash flows used in financing  activities totaled $86 million for the nine months
ended September 30, 2000. The Registrant's  principal  financing  activities for
the period  included  issuance of short-term and long-term  debt,  offset by the
redemption of long-term  debt and the payment of dividends.  On August 25, 2000,
the Registrant's  Board of Directors declared a quarterly dividend for the third
quarter of 2000 of 63.5 cents per common share that was paid to  shareholders on
September  29,  2000.  Common  stock  dividends  paid  for the 12  months  ended
September 30, 2000,  resulted in a payout rate of 82 percent of the Registrant's
earnings  to common  stockholders.  Dividends  paid to the  Registrant's  common
shareholders  relative to net cash provided by operating activities for the same
period were 42 percent.

                                       -4-

<PAGE>

The Registrant  plans to continue  utilizing  short-term  debt to support normal
operations and other temporary requirements. The Registrant and its subsidiaries
are authorized by the Securities  and Exchange  Commission  (SEC) under PUHCA to
have up to an aggregate $2.8 billion of short-term  unsecured  debt  instruments
outstanding  at any one time.  Short-term  borrowings  consist of bank loans and
commercial  paper  (maturities  generally within 1 to 45 days). At September 30,
2000,  the  Registrant  had  committed  bank  lines of credit  aggregating  $176
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. The Registrant has bank
credit agreements, expiring at various dates between 2000 and 2002, that support
commercial  paper  programs  totaling  $800  million,  $500  million of which is
available for the Registrant's own use and for the use of its subsidiaries.  The
remaining  $300 million is available for the use of the  Registrant's  regulated
subsidiaries. At September 30, 2000, $334 million was available under these bank
credit agreements.  The Registrant had $470 million of short-term  borrowings at
September 30, 2000.

AmerenUE also has a lease  agreement  that provides for the financing of nuclear
fuel. At September 30, 2000, the maximum amount that could be financed under the
agreement  was $120  million.  Cash used in  financing  activities  for the nine
months  ended  September  30,  2000,  included  redemptions  under the lease for
nuclear fuel of $8 million,  offset by $7 million of issuances. At September 30,
2000, $116 million was financed under the lease.

     On  November  1, 2000,  the Company  issued in a private  placement  Senior
Notes,  Series A due 2005 (Series A Notes) and Senior  Notes,  Series B due 2010
(Series B Notes)  (collectively,  the Senior Notes).  The Series A Notes totaled
$225 million.  Interest will accrue on the Series A Notes at a rate of 7.75% per
year and will be payable semiannually in arrears on May 1 and November 1 of each
year commencing on May 1, 2001.  Principal of the Series A Notes will be payable
on November 1, 2005.  Series B Notes totaled $200 million.  Interest will accrue
on the  Series  B  Notes  at a rate of  8.35%  per  year  and  will  be  payable
semiannually  in arrears on May 1 and November 1 of each year  commencing on May
1, 2001.  Principal  of the Series B Notes will be payable on  November 1, 2010.
The proceeds from the Senior Notes were $423.6  million,  excluding  transaction
costs. With the proceeds of the Senior Notes, the Company intends to paydown its
short-term  intercompany  borrowings  outstanding at September 30, 2000, pay for
the  construction  of certain  combustion  turbine  generators,  as well as fund
working capital and other capital expenditure needs.

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 reached  agreements
with many of the it's major collective  bargaining units which will permit it to
manage its labor costs and practices  effectively in the future.  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  (e.g.  utilizing  low  sulfur  versus  high  sulfur  coal),  as  well as
restructuring or terminating existing contracts with suppliers.

Certain  of  these  cost  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 an
existing fuel  contract  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,  as well as determine the impact of these actions on
the Registrant's future financial position, results of operations or liquidity.

RATE MATTERS

On October 17, 2000, the Missouri Public Service  Commission  (MoPSC) approved a
$4.2 million annual rate increase for natural gas service in AmerenUE's Missouri
jurisdiction. The rate increase became effective November 1, 2000.

With respect to AmerenUE's current electric three-year experimental  alternative
regulation  plan,  in  November  2000,  the MoPSC  approved  a  stipulation  and
agreement  of the  parties  regarding  the credit to be paid by  AmerenUE to its
Missouri electric  customers for the plan year ended June 30, 1999. Based on the
provisions of the stipulation  and agreement,  the credit to be paid to electric
customers for the plan year ended June 30, 1999 will approximate $22 million.

See Note 5 under Notes to Financial  Statements  for further  discussion of Rate
Matters.

                                       -5-

<PAGE>

In September  2000,  AmerenUE and  AmerenCIPS  filed a request with the Illinois
Commerce   Commission  (ICC)  seeking   authorization  to  transfer   AmerenUE's
Illinois-based  electric  and  natural  gas  businesses  and its  Illinois-based
distribution   and  transmission   assets  and  personnel  to  AmerenCIPS.   The
distribution and transmission assets and related liabilities will be transferred
from  AmerenUE to  AmerenCIPS  at  historical  net book value.  In October 2000,
AmerenUE  filed a request  with the MoPSC for  approval  of this  transfer.  The
transfer is also  subject to  regulatory  filings and  approvals  of the Federal
Energy Regulatory  Commission (FERC) and the Securities and Exchange  Commission
(SEC).

ELECTRIC INDUSTRY RESTRUCTURING

In December 1997, the Governor of Illinois signed the Electric  Service Customer
Choice and Rate  Relief Law of 1997 (the Law)  providing  for  electric  utility
restructuring  in Illinois.  This  legislation  introduces  competition into the
supply of electric energy in Illinois.

One of the major  provisions of the Law includes the phasing-in  through 2002 of
retail direct access, which allows customers to choose their electric generation
supplier.  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  10 percent of the
Registrant's  total sales. As of September 30, 2000, 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 conjunction with another provision of the Law, on May 1, 2000,  following the
receipt of all  required  State and  Federal  regulatory  approvals,  AmerenCIPS
transferred its electric  generating  assets and liabilities,  at historical net
book value, to a newly created  nonregulated  company,  AmerenEnergy  Generating
Company  (Generating  Company),  a subsidiary of the  Registrant's  wholly-owned
subsidiary,  AmerenEnergy  Resources Company,  in exchange for a promissory note
from Generating  Company in the principal amount of  approximately  $552 million
and Generating Company common stock. In addition,  on June 30, 2000,  Generating
Company  borrowed $50 million from Ameren to assist with the future  purchase of
combustion  turbine generators and to meet working capital needs. The promissory
notes each have a term of five years and bear  interest at 7% based on a 10-year
amortization.   The  transferred  assets  represent  a  generating  capacity  of
approximately 2,900 megawatts.  Approximately 45% of AmerenCIPS'  employees were
transferred to Generating Company as a part of the transaction.

Also on May 1, 2000, an electric power supply agreement was entered into between
Generating Company and its newly created  nonregulated  affiliate,  AmerenEnergy
Marketing  Company  (Marketing  Company),  also  a  wholly-owned  subsidiary  of
AmerenEnergy Resources Company. On the same date, Marketing Company entered into
an electric power supply agreement with AmerenCIPS to supply it sufficient power
to meet native load  requirements.  This  agreement  expires  December 31, 2004.
Power will continue to be jointly  dispatched  between  AmerenUE and  Generating
Company.

The creation of the new subsidiaries and the transfer of AmerenCIPS'  generating
assets  and  liabilities  had no  effect  on  the  financial  statements  of the
Registrant as of the date of transfer.

MIDWEST ISO

On November 9, 2000, the Registrant announced its intention to withdraw from the
Midwest  Independent System Operator (Midwest ISO) and to become a member of the
Alliance  Regional  Transmission   Organization   (Alliance  RTO),  pending  the
necessary regulatory approvals.  The Alliance RTO, including its rate structure,
is still  subject  to  approval  by the FERC.  Accordingly,  the  Registrant  is
currently  unable to determine the impact that operation of the Alliance RTO, or
the  withdrawal  from the Midwest  ISO,  will have on its  financial  condition,
results of operations or liquidity.

                                       -6-

<PAGE>

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Market risk  represents the risk of changes in value of a financial  instrument,
derivative  or  non-derivative,  caused by  fluctuations  in interest  rates and
equity prices.  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,
commercial paper and auction rate preferred  stock.  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 2001 as compared to 2000, the
Registrant's  interest expense would increase by  approximately  $12 million and
net income  would  decrease by  approximately  $7 million.  This amount has been
determined using the assumptions that the Registrant's outstanding variable rate
debt,  commercial  paper and auction market  preferred stock as of September 30,
2000, continued to be outstanding throughout 2001, and that the average interest
rates for these instruments  increased one percentage point over 2000. The model
does not consider the effects of the reduced level of 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.

Commodity Price Risk
The  Registrant  is exposed to changes in market prices for natural gas and fuel
and  purchased  power.  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 Purchased Gas Adjustment Clauses (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
regard to the Registrant's nonregulated generation operations, the Registrant is
exposed  to  changes  in market  prices  for  natural  gas to the extent it must
purchase natural gas to run its combustion  turbine  generators.  The Registrant
has entered into several long-term  contracts with various suppliers to purchase
natural gas to manage its exposure to natural gas prices.

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. With regard to the Registrant's exposure to commodity price risk
for purchased power and excess electricity sales, the Registrant has established
a subsidiary,  AmerenEnergy,  whose  primary  responsibility  includes  managing
market  risks  associated  with  the  changing  market  prices  for  electricity
purchased and sold for the  Registrant's  operating  subsidiaries,  AmerenUE and
AmerenCIPS.

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 and futures  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 September  30, 2000,  the fair value of derivative  financial  instruments
exposed to commodity price risk was immaterial.

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.  As of September  30, 2000,  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

                                       -7-
<PAGE>

fluctuations in equity markets, and the fixed-rate,  fixed-income securities are
exposed  to changes in  interest  rates.  The  Registrantactively  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)  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.  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.  In June 2000,  the FASB  issued  SFAS No.  138,  "Accounting  for Certain
Derivative  Instruments  and Certain  Hedging  Activities  -an amendment of FASB
Statement No. 133," which amended certain accounting and reporting  standards of
SFAS 133. Management believes that adoption of SFAS 133 will not have a material
impact on the  Registrant's  financial  position or results of  operations  upon
adoption based on the derivative instruments that existed at September 30, 2000.
However, changing market conditions, and the volume of future transactions which
fall within the scope of SFAS 133, as amended,  and the interpretations from the
FASB's  Derivative   Implementation  Group  could  change  management's  current
assessment.  As a result, SFAS 133, as amended, 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.

SAFE HARBOR STATEMENT

Statements made in this Form 10-Q 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 and
financial  performance.  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 the 1999 Annual
Report to Stockholders  (portions of which are  incorporated by reference in the
Registrant's 1999 Form 10-K) 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.

                                       -8-

<PAGE>
<TABLE>
<CAPTION>
                               AMEREN CORPORATION
                           CONSOLIDATED BALANCE SHEET
                                    UNAUDITED
                      (Thousands of Dollars, Except Shares)

                                                     September 30  December 31,
ASSETS                                                  2000           1999
                                                     -----------   ------------
<S>                                               <C>               <C>
Property and plant, at original cost:
   Electric00                                      $ 12,623,029      $12,053,411
   Gas                                                  506,822          491,708
   Other                                                 96,410           92,696
                                                   ------------      -----------
                                                     13,226,261       12,637,815
   Less accumulated depreciation and amortization     6,159,140        5,891,340
                                                   ------------      -----------
                                                      7,067,121        6,746,475
Construction work in progress:
  Nuclear fuel in process                               100,975           88,830
                                                        360,247          329,880
                                                   ------------      -----------
         Total property and plant, net                7,528,343        7,165,185
                                                   ------------      -----------
Investments and other assets:
   Investments                                           40,162           66,476
   Nuclear decommissioning trust fund                   194,294          186,760
   Other                                                 89,049           80,737
                                                   ------------      -----------
         Total investments and other assets             323,505          333,973
                                                   ------------      -----------
Current assets:
   Cash and cash equivalents                            237,537          194,882
   Accounts receivable - trade (less allowance
   for doubtful accounts of $10,397 and $7,136
         respectively)                                  302,742          216,344
   Unbilled revenue                                     147,432          154,097
   Other accounts and notes receivable                   29,186           20,668
   Materials and supplies, at average cost -
      Fossil fuel                                       130,398          123,143
      Other                                             118,928          130,081
   Other                                                 39,684           39,791
                                                    -----------      -----------
         Total current assets                         1,005,907          879,006
                                                    -----------      -----------
Regulatory assets:
   Deferred income taxes                                600,359          622,520
   Other                                                163,568          176,931
                                                    -----------      -----------
         Total regulatory assets                        763,927          799,451
                                                    -----------      -----------
Total Assets                                        $ 9,621,682      $ 9,177,615
                                                    ===========      ===========
CAPITAL AND LIABILITIES
Capitalization:
   Common stock, $.01 par value, 400,000,000
    shares authorized - 137,215,462 shares
    outstanding                                     $    1,372       $     1,372
   Other paid-in capital, principally premium
   on common stock                                   1,581,871         1,582,501
   Retained earnings                                 1,675,073         1,505,827
                                                    ----------       -----------
         Total common stockholders' equity           3,258,316         3,089,700
   Preferred stock not subject to
      mandatory redemption                             235,197           235,197
   Long-term debt                                    2,305,212         2,448,448
                                                    ----------       -----------
         Total capitalization                        5,798,725         5,773,345
                                                    ----------       -----------
Minority interest in consolidated subsidiaries           3,955             4,010
Current liabilities:
   Current maturity of long-term debt                   59,697           128,867
   Short-term debt                                     469,743            80,165
   Accounts and wages payable                          254,979           341,274
   Accumulated deferred income taxes                    57,464            70,719
   Taxes accrued                                       325,445           155,396
   Other                                               298,068           300,747
                                                    ----------       -----------
         Total current liabilities                   1,465,396         1,077,168
                                                    ----------       -----------
Accumulated deferred income taxes                    1,537,825         1,493,634
Accumulated deferred investment tax credits            166,333           170,834
Regulatory liability                                   185,561           188,404
Other deferred credits and liabilities                 463,887           470,220
                                                    ----------       -----------
Total Capital and Liabilities                      $ 9,621,682       $ 9,177,615
                                                   ===========       ===========
</TABLE>
See Notes to Consolidated Financial Statements.

                                       -9-

<PAGE>

<TABLE>
<CAPTION>

                               AMEREN CORPORATION
                        CONSOLIDATED STATEMENT OF INCOME
                                    UNAUDITED
           (Thousands of Dollars, Except Shares and Per Share Amounts)


                                           Three Months Ended        Nine Months Ended       Twelve Months Ended
                                              September 30,             September 30,          September 30,
                                           ------------------        -----------------       -------------------
                                             2000             1999          2000      1999           2000          1999
                                            -----            -----         ----       ----           ----          ----

 OPERATING REVENUES:
<S>                                         <C>            <C>           <C>         <C>          <C>           <C>
    Electric                                $1,158,197     $1,160,693    $2,774,047  $2,620,792   $3,440,845    $3,238,026
    Gas                                         36,275         29,675       181,447     161,600      248,145       220,948
    Other                                          939          3,094         5,597       6,856        6,484         8,777
                                            ----------     ----------    ----------  ----------   ----------    ----------
       Total operating revenues              1,195,411      1,193,462     2,961,091   2,789,248    3,695,474     3,467,751

 OPERATING EXPENSES:
    Operations
       Fuel and purchased power                285,157        295,625       770,259     718,493    1,025,043       878,446
       Gas                                      23,632         16,481       106,549      89,840      148,158       120,404
       Other                                   166,008        180,202       469,654     483,661      615,475       641,474
                                            ----------     ----------    ----------  ----------   ----------    ----------
                                               474,797        492,308     1,346,462   1,291,994    1,788,676     1,640,324
    Maintenance                                 79,155         80,976       267,653     252,115      386,411       339,720
    Depreciation and amortization               96,533         90,140       283,092     266,782      366,849       356,110
    Income taxes                               163,706        162,985       287,196     259,996      286,070       285,379
    Other taxes                                 75,535         70,326       203,219     191,435      258,376       250,313
                                            ----------     ----------    ----------  ----------   ----------    ----------
       Total operating expenses                889,726        896,735     2,387,622   2,262,322    3,086,382     2,871,846

 OPERATING INCOME                              305,685        296,727       573,469     526,926      609,092       595,905

 OTHER INCOME AND (DEDUCTIONS):
    Allowance for equity funds used
       during construction                       1,250          1,141         4,079       6,029        5,211         7,615
    Miscellaneous, net                          (5,481)        (2,784)      (13,481)     (6,718)     (17,576)       (4,050)
                                            -----------    ----------    ----------  ----------   -----------    ----------
       Total other income and (deductions)      (4,231)        (1,643)       (9,402)       (689)     (12,365)        3,565

 INCOME BEFORE INTEREST CHARGES
    AND PREFERRED DIVIDENDS                    301,454        295,084       564,067     526,237      596,727       599,470

 INTEREST CHARGES AND PREFERRED
    DIVIDENDS:
    Interest                                    44,223         43,396       129,411     131,444      166,242       176,726
    Allowance for borrowed funds
       used during construction                 (2,136)        (1,292)       (5,928)     (5,359)      (7,692)       (6,837)
    Preferred dividends of subsidiaries          3,230          3,161         9,469       9,455       12,664        12,603
                                            -----------    -----------   ----------  -----------  -----------    ---------
       Net interest charges and preferred       45,317         45,265       132,952     135,540      171,214       182,492
           dividends
 NET INCOME                                 $  256,137     $  249,819    $  431,115  $  390,697   $  425,513    $  416,978
                                            ==========     ==========    ==========  ==========   ==========    ==========

  EARNINGS PER COMMON SHARE -
    BASIC AND DILUTED (Based on
          average shares outstanding)            $1.87         $1.82         $3.14        $2.85        $3.10         $3.04
                                            ==========    ==========     =========   ==========   ==========    ==========
 AVERAGE COMMON SHARES
  OUTSTANDING                              137,215,462    137,215,462  137,215,462  137,215,462  137,215,462   137,215,462
                                           ===========    ===========  ===========  ===========  ===========   ===========
</TABLE>
<
 See Notes to Consolidated Financial Statements.

                                      -10-

<PAGE>

<TABLE>
<CAPTION>

                               AMEREN CORPORATION
                      CONSOLIDATED STATEMENT OF CASH FLOWS
                                    UNAUDITED
                             (Thousands of Dollars)



                                                          Nine Months Ended
                                                            September 30,
                                                       -----------------------
                                                          2000         1999
                                                          ----         ----

 Cash Flows From Operating:
<S>                                                    <C>          <C>
   Net income                                          $ 431,115    $ 390,697
   Adjustments to reconcile net income to net cash
      provided by operating activities:
        Depreciation and amortization                    273,841      259,447
       Amortization of nuclear fuel                       27,714       30,823
        Allowance for funds used during construction     (10,007)     (11,388)
        Deferred income taxes, net                        11,976      (16,493)
        Deferred investment tax credits, net              (4,501)      (6,021)
        Changes in assets and liabilities:
           Receivables, net                              (88,251)     (82,561)
           Materials and supplies                          3,898      (12,072)
           Accounts and wages payable                    (86,295)     (34,619)
           Taxes accrued                                 170,049      188,824
           Pension and postretirement benefits            (2,974)      33,192
           Credit to customers                           (20,507)      42,510
           Other, net                                     55,862       71,519
                                                       ---------    ---------
Net cash provided by operating activities                761,920      853,858

Cash Flows From Investing:
   Construction expenditures                            (657,622)    (342,352)
   Allowance for funds used during construction           10,007       11,388
   Nuclear fuel expenditures                             (11,691)     (19,662)
   Other                                                  26,314       23,829
                                                       ---------    ---------
Net cash used in investing activities                   (632,992)    (326,797)

Cash Flows From Financing:
   Dividends on common stock                            (261,395)    (261,395)
   Redemptions:
      Nuclear fuel lease                                  (8,276)     (11,332)
      Short-term debt                                       --        (58,528)
      Long-term debt                                    (491,050)     (60,000)
   Issuances:
      Nuclear fuel lease                                   7,270       60,045
      Short-term debt                                    389,578         --
      Long-term debt                                     277,600       58,400
                                                       ---------    ---------
Net cash used in financing activities                    (86,273)    (272,810)

Net change in cash and cash equivalents                   42,655      254,251
Cash and cash equivalents at beginning of year           194,882       76,863
                                                       ---------    ---------
Cash and cash equivalents at end of period             $ 237,537    $ 331,114
                                                       =========    =========


Cash paid during the periods:
   Interest (net of amount capitalized)                $ 118,111    $ 111,005
   Income taxes, net                                   $ 157,399    $ 157,774

See Notes to Consolidated Financial Statements.

</TABLE>

                                      -11-


<PAGE>

AMEREN CORPORATION
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
September 30, 2000

Note 1 - Ameren  Corporation  (Ameren) is a holding company registered under the
Public Utility  Holding  Company Act of 1935 (PUHCA).  In December  1997,  Union
Electric Company  (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).  As a result of the Merger,  Ameren has a 60% ownership
interest in  Electric  Energy,  Inc.  (EEI).  EEI owns and  operates an electric
generation and  transmission  facility in Illinois that supplies  electric power
primarily  to a uranium  enrichment  plant  located in Paducah,  Kentucky.  That
interest is consolidated  for financial  reporting  purposes.  Since the Merger,
Ameren has formed AmerenEnergy, Inc. (AmerenEnergy), Ameren Development Company,
AmerenEnergy  Resources Company, and Ameren Services Company.  AmerenEnergy,  an
energy marketing subsidiary, primarily serves as a power marketing agent for the
operating  utility  subsidiaries  and  provides  a  range  of  energy  and  risk
management  services  to targeted  customers.  Ameren  Development  Company is a
nonregulated   subsidiary   encompassing   Ameren's  nonregulated  products  and
services.  AmerenEnergy  Resources  Company holds the Registrant's  nonregulated
generating operations.  Ameren Services Company provides shared support services
to Ameren and all of its subsidiaries.

The  accompanying  financial  statements  include the accounts of Ameren and its
consolidated  subsidiaries  (collectively the Registrant).  All subsidiaries for
which the  Registrant  owns directly or  indirectly  more than 50 percent of the
voting  stock  are  included  as  consolidated  subsidiaries.  Ameren's  primary
operating companies, AmerenUE, AmerenCIPS and AmerenEnergy Generating Company, a
wholly  owned  subsidiary  of  AmerenEnergy   Resources  Company,   are  engaged
principally in the generation,  transmission,  distribution and sale of electric
energy and the purchase,  distribution,  transportation and sale of natural gas.
The  operating  companies  serve 1.5 million  electric  and 300,000  natural gas
customers in a 44,500-square-mile area of Missouri and Illinois. All significant
intercompany   balances  and   transactions   have  been   eliminated  from  the
consolidated financial statements.

In  conjunction  with the Illinois  Electric  Service  Customer  Choice and Rate
Relief Law of 1997, on May 1, 2000,  following the receipt of all required State
and Federal regulatory approvals, AmerenCIPS transferred its electric generating
assets  and  liabilities,  at  historical  net book  value,  to a newly  created
nonregulated  company,  AmerenEnergy  Generating Company (Generating Company), a
subsidiary of the Registrant's  wholly-owned subsidiary,  AmerenEnergy Resources
Company,  in  exchange  for a  promissory  note from  Generating  Company in the
principal  amount of  approximately  $552 million and Generating  Company common
stock. In addition,  on June 30, 2000,  Generating  Company borrowed $50 million
from Ameren to assist with the future purchase of combustion  turbine generators
and to meet working capital needs. The promissory notes each have a term of five
years and bear interest at 7% based on a 10-year  amortization.  The transferred
assets  represent  a  generating  capacity  of  approximately  2,900  megawatts.
Approximately  45% of  AmerenCIPS'  employees  were  transferred  to  Generating
Company as a part of the transaction.

Also on May 1, 2000, an electric power supply agreement was entered into between
Generating Company and its newly created  nonregulated  affiliate,  AmerenEnergy
Marketing  Company  (Marketing  Company),  also  a  wholly-owned  subsidiary  of
AmerenEnergy Resources Company. On the same date, Marketing Company entered into
an electric power supply agreement with AmerenCIPS to supply it sufficient power
to meet native load  requirements.  This  agreement  expires  December 31, 2004.
Power will continue to be jointly  dispatched  between  AmerenUE and  Generating
Company.

The creation of the new subsidiaries and the transfer of AmerenCIPS'  generating
assets  and  liabilities  had no  effect  on  the  financial  statements  of the
Registrant as of the date of transfer.

Note 2 - Financial statement note disclosures, normally included in consolidated
financial  statements  prepared in conformity with generally accepted accounting
principles,  have  been  omitted  in this Form  10-Q  pursuant  to the Rules and
Regulations of the Securities and Exchange  Commission.  However, in the opinion
of the Registrant,  the disclosures  contained in this Form 10-Q are adequate to
make the  information  presented  not  misleading.  See  Notes  to  Consolidated
Financial  Statements  included in the 1999 Annual Report to Stockholders (which
are  incorporated  by  reference  in  the  Registrant's   1999  Form  10-K)  for
information relevant to the consolidated  financial statements contained in this
Form 10-Q,  including  information as to the significant  accounting policies of
the Registrant.

                                      -12-

<PAGE>

Note 3 - In the  opinion of the  Registrant,  the interim  financial  statements
filed as part of this Form 10-Q  reflect  all  adjustments,  consisting  only of
normal recurring adjustments,  necessary for a fair statement of the results for
the periods presented.  The Registrant's  consolidated financial statements were
prepared to permit the  information  required  in the  Financial  Data  Schedule
(FDS),  Exhibit 27, to be directly extracted from the filed statements.  The FDS
amounts  correspond  to or are  calculable  from  the  amounts  reported  in the
consolidated financial statements or notes thereto.

Note 4 - Due to the  effect of  weather  on sales and  other  factors  which are
characteristic of public utility  operations,  financial results for the periods
ended September 30, 2000 and 1999, are not necessarily  indicative of trends for
any three-month, nine-month or twelve-month period.

Note 5 - In July 1995, the Missouri Public Service  Commission  (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.

The MoPSC staff proposed  adjustments  to the  Registrant's  estimated  customer
credit for the final year of the Original  Plan ended June 30, 1998,  which were
the  subject of  regulatory  proceedings  before the MoPSC in 1999.  In December
1999,  the MoPSC issued a Report and Order  (Order)  concerning  these  proposed
adjustments.  Based on the provisions of that Order, the Registrant  revised its
estimated final year credit to $31 million.  Subsequently, in December 1999, the
Registrant  filed a request for  rehearing  of the Order with the MoPSC,  asking
that  it  reconsider  its  decision  to  adopt  certain  of  the  MoPSC  staff's
adjustments.  The  request  was denied by the MoPSC and in  February  2000,  the
Registrant  filed a Petition  for Writ of Review with the Circuit  Court of Cole
County,  Missouri,  requesting that the Order be reversed. The appeal is pending
and the ultimate  outcome can not be predicted;  however,  the final decision is
not expected to materially impact the financial condition, results of operations
or liquidity of the  Registrant.  A partial stay of the Order was granted by the
Court pending the appeal.

 A new three-year  experimental  alternative  regulation plan (the New Plan) was
included in the joint  agreement  authorized  by the MoPSC in its February  1997
order  approving the Merger.  Like the Original Plan, the New Plan requires that
earnings  over a 12.61  percent  ROE up to a 14  percent  ROE be shared  equally
between  customers and  stockholders.  The New Plan also returns to customers 90
percent of all earnings above a 14 percent ROE up to a 16 percent ROE.  Earnings
above a 16 percent ROE are  credited  entirely to  customers.  The New Plan runs
from July 1, 1998 through June 30, 2001. At September 30, 2000,  the  Registrant
has recorded  estimated credits that the Registrant  expects to pay its Missouri
electric  customers  of $20  million,  $35  million and $25 million for the plan
years ended June 30,  2001,  June 30,  2000,  and June 30,  1999,  respectively.
During the three months ended  September 30, 2000,  the  Registrant  recorded an
estimated credit of $20 million (8 cents per share) for the plan year ended June
30, 2001.  No credits  under the New Plan were  recorded  during the same period
last year. For the nine months ended September 30, 2000, the Registrant recorded
estimated  credits  in total of $35  million  (15 cents per share) for plan year
under the New Plan  compared  to $30  million  (12 cents per share) in the prior
period.  These credits were reflected as a reduction in electric  revenues.  The
final  amount of the  credits  will  depend on several  factors,  including  the
Registrant's earnings for the respective 12 months ended June 30.

In November 2000, the MoPSC approved a stipulation  and agreement of the parties
regarding  the  credit to be paid by the  Registrant  to its  Missouri  electric
customers for the plan year ended June 30, 1999.  Based on the provisions of the
stipulation and agreement,  the credit to be paid to electric  customers for the
plan year ended June 30, 1999 will approximate $22 million.

The joint  agreement  approved by the MoPSC in its February 1997 Order approving
the Merger also provided 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 rate decrease was impacted by the Order
issued by the MoPSC in December 1999  relating to the  estimated  credit for the
third year of the Original Plan and a settlement reached between the Registrant,
the  MoPSC  staff  and  other  parties   relating  to  the  calculation  of  the
weather-adjusted  credits. Based on those results, the Registrant estimates that
its Missouri  electric rate decrease will be $17 million on an annualized basis.
This  estimate  is subject to the final  outcome of the  above-referenced  court
appeal of the Order.

                                      -13-

<PAGE>

Note 6- - The Company's  union  employees are  represented by the  International
Brotherhood  of  Electrical  Workers and the  International  Union of  Operating
Engineers.   These  employees  comprise   approximately  68%  of  the  Company's
workforce.   New  contracts  with  collective   bargaining  units   representing
approximately  59% of these  employees were ratified in 1999 with terms expiring
in  2002.  New  contracts  with   collective   bargaining   units   representing
approximately  21% of these  employees were ratified in 2000 with terms expiring
in 2003. In August 2000, the remaining collective  bargaining units representing
approximately  19% of the Registrant's  union employees,  ratified the Company's
last, best and final offer for a new contract with a term expiring in 2003.

Note 7- On November 9, 2000, the Registrant  announced its intention to withdraw
from the  Midwest  Independent  System  Operator  and to  become a member of the
Alliance  Regional  Transmission   Organization   (Alliance  RTO),  pending  the
necessary regulatory approvals.  The Alliance RTO, including its rate structure,
is still  subject  to  approval  by the FERC.  Accordingly,  the  Registrant  is
currently  unable to determine the impact that operation of the Alliance RTO, or
the  withdrawal  from the Midwest  ISO,  will have on its  financial  condition,
results of operations or liquidity

Note 8- In  September  2000,  AmerenUE and  AmerenCIPS  filed a request with the
Illinois Commerce Commission (ICC) seeking  authorization to transfer AmerenUE's
Illinois-based  electric  and  natural  gas  businesses  and its  Illinois-based
distribution   and  transmission   assets  and  personnel  to  AmerenCIPS.   The
distribution and transmission assets and related liabilities will be transferred
from  AmerenUE to  AmerenCIPS  at  historical  net book value.  In October 2000,
AmerenUE  filed a request  with the MoPSC for  approval  of this  transfer.  The
transfer is also  subject to  regulatory  filings and  approvals  of the Federal
Energy Regulatory Commission (FERC) and the Securities and Exchange Commission.

Note 9 -  Segment  information  for the  three-month,  nine-month  and  12-month
periods ended September 30, 2000 and 1999 is as follows:
-------------------------------------------------------------------------------
                                        Regulated           Reconciling
(in millions)                           Utilities  All Other  Items *     Total
-------------------------------------------------------------------------------

Three months ended September 30, 2000:

Revenues                                 $1,093     $289       $(187)    $1,195
Net Income                                  232       24          --        256
--------------------------------------------------------------------------------

Three months ended September 30, 1999:

Revenues                                 $1,185    $  62       $ (54)    $1,193
Net Income                                  248        2          --        250
--------------------------------------------------------------------------------

Nine months ended September 30, 2000:

Revenues                                 $2,787    $551        $(377)    $2,961
Net Income                                  396      35           --        431
--------------------------------------------------------------------------------

Nine months ended September 30, 1999:

Revenues                                 $2,742    $182        $(135)    $2,789
Net Income                                  387       4           --        391
--------------------------------------------------------------------------------

12 months ended September 30, 2000:

Revenues                                 $3,500    $611        $(416)    $3,695
Net Income                                  392      34           --        426
--------------------------------------------------------------------------------

12 months ended September 30, 1999:

Revenues                                 $3,397    $230        $(159)   $ 3,468
Net Income                                  408       9           --        417
--------------------------------------------------------------------------------

* Elimination of intercompany revenues.

                                      -14-

<PAGE>
                           PART II. OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS
         -----------------

     On June 23, 2000, the United States  Environmental  Protection Agency (EPA)
notified Union Electric Company  (AmerenUE),  the Registrant's  subsidiary,  and
numerous  other  companies  that certain  properties  in Sauget,  Illinois,  may
contain soil and groundwater contamination.  From approximately 1926 until 1976,
AmerenUE  operated a power  generating  facility and currently owns and operates
electric  transmission  facilities  in the area.  AmerenUE  has joined with nine
other companies to perform an investigation  of soil and groundwater  conditions
in  the  area  and is  currently  negotiating  with  the  EPA  the  terms  of an
Administrative  Order on Consent that provides for the performance of such work.
The investigation process should take approximately two years. At this time, the
Registrant  is unable to predict the  ultimate  impact of the Sauget site on its
future financial position, results of operations or liquidity.

     On September 25, 2000, the United States  Department of Justice was granted
leave by the United States District Court - Southern District of Illinois to add
numerous  additional  parties,  including  AmerenUE,  to a pre-existing  lawsuit
between the government and Monsanto Chemical Company and others.  The government
seeks recovery of response costs under the Comprehensive  Environmental Response
Compensation  Liability  Act of 1980  (commonly  known as CERCLA or  Superfund),
incurred in  connection  with an  Illinois  Superfund  site  referred to as Dead
Creek.  AmerenUE  owns a  transmission  line  which  traverses  the  creek.  The
Registrant  believes  that the final  resolution of this lawsuit will not have a
material  adverse  effect on its  financial  position,  results of operations or
liquidity.

     Reference  is made to  "Regulation"  section  in  Item 1.  Business  of the
Registrant's  Form 10-K for the year ended  December  31, 1999 and Item 1. Legal
Proceedings in Part II of the  Registrant's  Form 10-Q for the quarterly  period
ended June 30, 2000,  for  information  relating to  litigation  concerning  the
alleged  exposure  to  carcinogens  contained  in coal  tar at the  Taylorville,
Illinois, manufactured gas plant site of Central Illinois Public Service Company
(AmerenCIPS),  the  Registrant's  subsidiary.  On October 4, 2000,  the Illinois
Supreme Court  granted  AmerenCIPS'  request to review a decision  issued by the
Illinois  Appellate  Court in March 2000 which upheld a $3.2 million  verdict in
favor of the plaintiffs against  AmerenCIPS.  The Registrant believes that final
disposition  of this  matter  will not have a  material  adverse  effect  on its
financial position, results of operations or liquidity.

     On August 24, 2000,  Steven and Tina Brannon  sued the  Registrant  and its
subsidiaries,  AmerenCIPS  and  AmerenEnergy  Generating  Company in the Circuit
Court of Christian County, Illinois. The suit alleges that AmerenCIPS and others
were negligent in the manner in which  AmerenCIPS'  manufactured  gas plant site
was remediated in Taylorville, Illinois, therefore, wrongfully causing the death
of their son. The Brannon's son was born in 1992,  diagnosed with  neuroblastoma
in 1996, and died in 1998. The  remediation  occurred in 1987.  Plaintiffs  seek
unspecified  compensatory  damages in excess of $50,000. The Registrant believes
that the final  resolution  of this  lawsuit  will not have a  material  adverse
effect on its financial position, results of operations or liquidity.

     Reference  is  made  to  Item  1.  Legal  Proceedings  in  Part  II of  the
Registrant's  Form  10-Q for the  quarterly  period  ended  June 30,  2000,  for
information  relating to a lawsuit filed in the Circuit Court of Madison County,
Illinois,  by twenty-three  named  plaintiffs  alleging  negligence on behalf of
AmerenCIPS and Dover  Elevator  Company  (Dover) for injuries  arising out of an
elevator  accident  which  occurred  at the  AmerenCIPS'  Newton  Power Plant in
November  1996.  In  mid-October  2000, a settlement  agreement was entered into
which (i) capped  all of the  plaintiffs'  damages  and (ii)  apportioned  fault
between AmerenCIPS and Dover as to approximately one-half of the plaintiffs. The
settlement  is the  subject of a  confidentiality  agreement.  Subsequently,  an
apportionment  trial was held between  AmerenCIPS  and Dover as to the remaining
plaintiffs.  The jury found  AmerenCIPS  ninety-five  percent at fault and Dover
five  percent at fault.  The  Registrant  has  adequate  insurance  to cover the
settlement  and the judgment  entered in these  proceedings.  As such, the final
resolution  of this  lawsuit  will not have a  material  adverse  effect  on the
Registrant's financial position, results of operations or liquidity.

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K
         --------------------------------

         (a)   Exhibits.

               Exhibit 27 - Financial Data Schedule.

         (b)   Reports on Form 8-K.  None.


                                   SIGNATURES

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.

                                                  AMEREN CORPORATION
                                                     (Registrant)

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

Date:  November 14, 2000

                                      -15-



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