<TABLE> <S> <C>
<PAGE>
<ARTICLE> UT
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<BOOK-VALUE> PER-BOOK
<TOTAL-NET-UTILITY-PLANT> 1,325,886
<OTHER-PROPERTY-AND-INVEST> 59,384
<TOTAL-CURRENT-ASSETS> 598,581
<TOTAL-DEFERRED-CHARGES> 737,203
<OTHER-ASSETS> 0
<TOTAL-ASSETS> 2,721,054
<COMMON> 0
<CAPITAL-SURPLUS-PAID-IN> 498,040
<RETAINED-EARNINGS> 31,109
<TOTAL-COMMON-STOCKHOLDERS-EQ> 529,149
0
222,627<F1>
<LONG-TERM-DEBT-NET> 1,060,773
<SHORT-TERM-NOTES> 0
<LONG-TERM-NOTES-PAYABLE> 0
<COMMERCIAL-PAPER-OBLIGATIONS> 0
<LONG-TERM-DEBT-CURRENT-PORT> 796
0
<CAPITAL-LEASE-OBLIGATIONS> 10,524
<LEASES-CURRENT> 776
<OTHER-ITEMS-CAPITAL-AND-LIAB> 896,409
<TOT-CAPITALIZATION-AND-LIAB> 2,721,054
<GROSS-OPERATING-REVENUE> 846,535
<INCOME-TAX-EXPENSE> 21,841
<OTHER-OPERATING-EXPENSES> 711,851
<TOTAL-OPERATING-EXPENSES> 733,692
<OPERATING-INCOME-LOSS> 112,843
<OTHER-INCOME-NET> 13,898
<INCOME-BEFORE-INTEREST-EXPEN> 126,741
<TOTAL-INTEREST-EXPENSE> 66,993<F2>
<NET-INCOME> 59,748
2,570
<EARNINGS-AVAILABLE-FOR-COMM> 57,178
<COMMON-STOCK-DIVIDENDS> 268,571
<TOTAL-INTEREST-ON-BONDS> 56,203
<CASH-FLOW-OPERATIONS> 114,940
<EPS-BASIC> 0
<EPS-DILUTED> 0
<FN>
<F1>Includes $12,019 of Preference Stock
<F2>Includes $9,422 of Monthly Income Preferred Securities Dividend
Requirements.
</FN>
</TABLE>
