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

<TABLE> <S> <C>


<ARTICLE>  UT
<LEGEND>

                                                                     Exhibit 27


                             UNION ELECTRIC COMPANY
                               10-Q MARCH 31, 2000
                           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)

</LEGEND>



                                                       Value
                                                  -----------------

<S>                                                   <C>
<PERIOD-TYPE>                                                3-MOS
<FISCAL-YEAR-END>                                      DEC-31-2000
<PERIOD-END>                                           MAR-31-2000
<BOOK-VALUE>                                              PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                5,365,103
<OTHER-PROPERTY-AND-INVEST>                                193,438
<TOTAL-CURRENT-ASSETS>                                     695,175
<TOTAL-DEFERRED-CHARGES>                                    61,264
<OTHER-ASSETS>                                             755,954
<TOTAL-ASSETS>                                           7,070,934
<COMMON>                                                   510,619
<CAPITAL-SURPLUS-PAID-IN>                                  701,896
<RETAINED-EARNINGS>                                      1,189,123
<TOTAL-COMMON-STOCKHOLDERS-EQ>                           2,401,638
<PREFERRED-MANDATORY>                                            0
<PREFERRED>                                                155,197
<LONG-TERM-DEBT-NET>                                     1,679,033
<SHORT-TERM-NOTES>                                               0
<LONG-TERM-NOTES-PAYABLE>                                        0
<COMMERCIAL-PAPER-OBLIGATIONS>                                   0
<LONG-TERM-DEBT-CURRENT-PORT>                              186,500
<PREFERRED-STOCK-CURRENT>                                        0
<CAPITAL-LEASE-OBLIGATIONS>                                103,480
<LEASES-CURRENT>                                            12,791
<OTHER-ITEMS-CAPITAL-AND-LIAB>                           2,532,295
<TOT-CAPITALIZATION-AND-LIAB>                            7,070,934
<GROSS-OPERATING-REVENUE>                                  561,190
<INCOME-TAX-EXPENSE>                                        28,612
<OTHER-OPERATING-EXPENSES>                                 466,803
<TOTAL-OPERATING-EXPENSES>                                 495,415
<OPERATING-INCOME-LOSS>                                     65,775
<OTHER-INCOME-NET>                                           4,108
<INCOME-BEFORE-INTEREST-EXPEN>                              69,883
<TOTAL-INTEREST-EXPENSE>                                    30,647
<NET-INCOME>                                                39,236
<PREFERRED-STOCK-DIVIDENDS>                                  2,204
<EARNINGS-AVAILABLE-FOR-COMM>                               37,032
<COMMON-STOCK-DIVIDENDS>                                    69,076
<TOTAL-INTEREST-ON-BONDS>                                        0  <F1>
<CASH-FLOW-OPERATIONS>                                     140,635
<EPS-BASIC>                                                   0.00  <F2>
<EPS-DILUTED>                                                 0.00  <F2>

<FN>
<F1>  Required in fiscal year-end only.
<F2>  Information not normally disclosed in financial statements and notes.
</FN>




</TABLE>