<TABLE> <S> <C>
<ARTICLE> UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET, CONSOLIDATED STATEMENT OF INCOME, AND
CONSOLIDATED STATEMENT OF CASH FLOWS OF NIAGARA MOHAWK POWER CORPORATION
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000071932
<NAME> Niagara Mohawk Power Corporation
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> SEP-30-2000
<BOOK-VALUE> PER-BOOK
<TOTAL-NET-UTILITY-PLANT> 5752869
<OTHER-PROPERTY-AND-INVEST> 404397
<TOTAL-CURRENT-ASSETS> 736600
<TOTAL-DEFERRED-CHARGES> 5398300
<OTHER-ASSETS> 82228
<TOTAL-ASSETS> 12374394
<COMMON> 187365
<CAPITAL-SURPLUS-PAID-IN> 2362063
<RETAINED-EARNINGS> 350570
<TOTAL-COMMON-STOCKHOLDERS-EQ> 2488082
53750
440000
<LONG-TERM-DEBT-NET> 4712280
<SHORT-TERM-NOTES> 0
<LONG-TERM-NOTES-PAYABLE> 0
<COMMERCIAL-PAPER-OBLIGATIONS> 0
<LONG-TERM-DEBT-CURRENT-PORT> 865167
7620
<CAPITAL-LEASE-OBLIGATIONS> 0
<LEASES-CURRENT> 0
<OTHER-ITEMS-CAPITAL-AND-LIAB> 3807495
<TOT-CAPITALIZATION-AND-LIAB> 12374394
<GROSS-OPERATING-REVENUE> 2890634
<INCOME-TAX-EXPENSE> 25393
<OTHER-OPERATING-EXPENSES> 2499230
<TOTAL-OPERATING-EXPENSES> 2499230
<OPERATING-INCOME-LOSS> 391404
<OTHER-INCOME-NET> (14562)
<INCOME-BEFORE-INTEREST-EXPEN> 376842
<TOTAL-INTEREST-EXPENSE> 329146
<NET-INCOME> 21394
23679
<EARNINGS-AVAILABLE-FOR-COMM> (2285)
<COMMON-STOCK-DIVIDENDS> 0
<TOTAL-INTEREST-ON-BONDS> 0
<CASH-FLOW-OPERATIONS> 625971
<EPS-BASIC> 0
<EPS-DILUTED> 0
</TABLE>
