<ARTICLE>                     UT
<LEGEND>
THIS  SCHEDULE   CONTAINS   SUMMARY   FINANCIAL   INFORMATION   EXTRACTED   FROM
CONSTELLATION  ENERGY'S MARCH 31, 1999 INTERIM  CONSOLIDATED  INCOME  STATEMENT,
BALANCE  SHEET AND  STATEMENT  OF CASH FLOWS AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH STATEMENTS.
</LEGEND>
<MULTIPLIER>                                                     1,000,000

                                                       
<PERIOD-TYPE>                                             3-MOS
<FISCAL-YEAR-END>                                         DEC-31-1999
<PERIOD-START>                                            JAN-01-1999
<PERIOD-END>                                              MAR-31-1999
<BOOK-VALUE>                                              PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                            5,640
<OTHER-PROPERTY-AND-INVEST>                                          1,708
<TOTAL-CURRENT-ASSETS>                                               1,348
<TOTAL-DEFERRED-CHARGES>                                               588
<OTHER-ASSETS>                                                           0
<TOTAL-ASSETS>                                                       9,284
<COMMON>                                                             1,493
<CAPITAL-SURPLUS-PAID-IN>                                                0
<RETAINED-EARNINGS>                                                  1,510
<TOTAL-COMMON-STOCKHOLDERS-EQ>                                       3,006
<PREFERRED-MANDATORY>                                                    0
<PREFERRED>                                                            190
<LONG-TERM-DEBT-NET>                                                 3,136
<SHORT-TERM-NOTES>                                                       0
<LONG-TERM-NOTES-PAYABLE>                                                0
<COMMERCIAL-PAPER-OBLIGATIONS>                                           0
<LONG-TERM-DEBT-CURRENT-PORT>                                          248
<PREFERRED-STOCK-CURRENT>                                                7
<CAPITAL-LEASE-OBLIGATIONS>                                              0
<LEASES-CURRENT>                                                         0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                                       2,697
<TOT-CAPITALIZATION-AND-LIAB>                                        9,284
<GROSS-OPERATING-REVENUE>                                              932
<INCOME-TAX-EXPENSE>                                                    50
<OTHER-OPERATING-EXPENSES>                                             734
<TOTAL-OPERATING-EXPENSES>                                             784
<OPERATING-INCOME-LOSS>                                                148
<OTHER-INCOME-NET>                                                      (1)
<INCOME-BEFORE-INTEREST-EXPEN>                                         147
<TOTAL-INTEREST-EXPENSE>                                                61
<NET-INCOME>                                                            86
<PREFERRED-STOCK-DIVIDENDS>                                              3
<EARNINGS-AVAILABLE-FOR-COMM>                                           83
<COMMON-STOCK-DIVIDENDS>                                                63
<TOTAL-INTEREST-ON-BONDS>                                               62
<CASH-FLOW-OPERATIONS>                                                 321
<EPS-BASIC>                                                         0.55
<EPS-DILUTED>                                                         0.55