<TABLE> <S> <C>
<ARTICLE> 5
<LEGEND>
Allegheny Generating Company
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> 3-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-START> JUL-01-2000
<PERIOD-END> SEP-30-2000
<EXCHANGE-RATE> 1
<CASH> 38
<SECURITIES> 0
<RECEIVABLES> 0
<ALLOWANCES> 0
<INVENTORY> 2,133
<CURRENT-ASSETS> 4,183
<PP&E> 829,042
<DEPRECIATION> 239,903
<TOTAL-ASSETS> 606,648
<CURRENT-LIABILITIES> 61,388
<BONDS> 149,017
0
0
<COMMON> 1
<OTHER-SE> 147,274
<TOTAL-LIABILITY-AND-EQUITY> 606,648
<SALES> 17,257
<TOTAL-REVENUES> 17,257
<CGS> 1,423
<TOTAL-COSTS> 6,810
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 3,400
<INCOME-PRETAX> 7,329
<INCOME-TAX> 1,415
<INCOME-CONTINUING> 1,415
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 5,914
<EPS-BASIC> 0.00<F1>
<EPS-DILUTED> 0.00<F1>
<FN>
<F1>* All common stock is owned by parent, no EPS required.
</FN>
</TABLE>