<TABLE> <S> <C>
<ARTICLE> 5
<LEGEND>
Allegheny Energy, Inc. Consolidated
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> 3-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-START> APR-01-2000
<PERIOD-END> JUN-30-2000
<EXCHANGE-RATE> 1
<CASH> 7,754
<SECURITIES> 2,486
<RECEIVABLES> 411,787
<ALLOWANCES> 29,854
<INVENTORY> 159,932
<CURRENT-ASSETS> 695,670
<PP&E> 9,007,373
<DEPRECIATION> 3,722,567
<TOTAL-ASSETS> 6,833,319
<CURRENT-LIABILITIES> 1,264,843
<BONDS> 2,315,098
0
74,000
<COMMON> 153,045
<OTHER-SE> 1,534,651<F1>
<TOTAL-LIABILITY-AND-EQUITY> 6,833,319
<SALES> 865,323
<TOTAL-REVENUES> 865,323
<CGS> 590,854
<TOTAL-COSTS> 704,397
<OTHER-EXPENSES> 1,260
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 52,522
<INCOME-PRETAX> 113,440
<INCOME-TAX> 41,984
<INCOME-CONTINUING> 71,456
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 71,456
<EPS-BASIC> 0.65
<EPS-DILUTED> 0.65
<FN>
<F1>Includes $398,407 for treasury stock (at cost).
</FN>
</TABLE>