<ARTICLE> 5
<LEGEND>
Allegheny Energy, Inc. Consolidated
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               MAR-31-2000
<EXCHANGE-RATE>                                      1
<CASH>                                          16,492
<SECURITIES>                                     2,668
<RECEIVABLES>                                  410,574
<ALLOWANCES>                                    28,340
<INVENTORY>                                    159,680
<CURRENT-ASSETS>                               676,176
<PP&E>                                       8,902,657
<DEPRECIATION>                               3,675,227
<TOTAL-ASSETS>                               6,774,832
<CURRENT-LIABILITIES>                        1,284,181
<BONDS>                                      2,249,801
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                     74,000
<COMMON>                                       153,045
<OTHER-SE>                                   1,510,682<F1>
<TOTAL-LIABILITY-AND-EQUITY>                 6,774,832
<SALES>                                        866,790
<TOTAL-REVENUES>                               866,790
<CGS>                                          555,825
<TOTAL-COSTS>                                  669,413
<OTHER-EXPENSES>                                 1,260
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              51,990
<INCOME-PRETAX>                                143,642
<INCOME-TAX>                                    57,247
<INCOME-CONTINUING>                             86,395
<DISCONTINUED>                                       0
<EXTRAORDINARY>                               (70,505)
<CHANGES>                                            0
<NET-INCOME>                                    15,890
<EPS-BASIC>                                       0.14
<EPS-DILUTED>                                     0.14
<FN>
<F1>*Includes $398,407 for treasury stock (at cost).
</FN>