<ARTICLE> 5
<LEGEND>
Allegheny Generating Company
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS

                             
<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
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          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>