<TABLE> <S> <C>
<PAGE>
<ARTICLE> UT
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<BOOK-VALUE> PER-BOOK
<TOTAL-NET-UTILITY-PLANT> 1,318,290
<OTHER-PROPERTY-AND-INVEST> 59,346
<TOTAL-CURRENT-ASSETS> 767,051
<TOTAL-DEFERRED-CHARGES> 799,657
<OTHER-ASSETS> 0
<TOTAL-ASSETS> 2,944,344
<COMMON> 0
<CAPITAL-SURPLUS-PAID-IN> 497,762
<RETAINED-EARNINGS> 30,171
<TOTAL-COMMON-STOCKHOLDERS-EQ> 527,933
0
222,028<F1>
<LONG-TERM-DEBT-NET> 1,060,713
<SHORT-TERM-NOTES> 0
<LONG-TERM-NOTES-PAYABLE> 0
<COMMERCIAL-PAPER-OBLIGATIONS> 0
<LONG-TERM-DEBT-CURRENT-PORT> 0
0
<CAPITAL-LEASE-OBLIGATIONS> 10,726
<LEASES-CURRENT> 755
<OTHER-ITEMS-CAPITAL-AND-LIAB> 1,122,189
<TOT-CAPITALIZATION-AND-LIAB> 2,944,344
<GROSS-OPERATING-REVENUE> 541,739
<INCOME-TAX-EXPENSE> 17,210
<OTHER-OPERATING-EXPENSES> 441,233
<TOTAL-OPERATING-EXPENSES> 458,443
<OPERATING-INCOME-LOSS> 83,296
<OTHER-INCOME-NET> 11,590
<INCOME-BEFORE-INTEREST-EXPEN> 94,886
<TOTAL-INTEREST-EXPENSE> 46,918<F2>
<NET-INCOME> 47,968
1,726
<EARNINGS-AVAILABLE-FOR-COMM> 46,242
<COMMON-STOCK-DIVIDENDS> 257,728
<TOTAL-INTEREST-ON-BONDS> 38,893
<CASH-FLOW-OPERATIONS> (115,969)
<EPS-BASIC> 0.00
<EPS-DILUTED> 0.00
<FN>
<F1>Includes $11,420 of Preference Stock.
<F2>Includes $6,281 of Monthly Income Preferred Securities Dividend
Requirements.
</FN>
</TABLE>
