<TABLE> <S> <C>
<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> 3,790,260
<OTHER-PROPERTY-AND-INVEST> 214,019
<TOTAL-CURRENT-ASSETS> 504,058
<TOTAL-DEFERRED-CHARGES> 0
<OTHER-ASSETS> 624,577
<TOTAL-ASSETS> 5,132,914
<COMMON> 853,643
<CAPITAL-SURPLUS-PAID-IN> 461,617
<RETAINED-EARNINGS> 96,012
<TOTAL-COMMON-STOCKHOLDERS-EQ> 1,411,272
58,162
60,000
<LONG-TERM-DEBT-NET> 1,914,788
<SHORT-TERM-NOTES> 191,250
<LONG-TERM-NOTES-PAYABLE> 0
<COMMERCIAL-PAPER-OBLIGATIONS> 267,037
<LONG-TERM-DEBT-CURRENT-PORT> 25,000
0
<CAPITAL-LEASE-OBLIGATIONS> 0
<LEASES-CURRENT> 0
<OTHER-ITEMS-CAPITAL-AND-LIAB> 1,205,405
<TOT-CAPITALIZATION-AND-LIAB> 5,132,914
<GROSS-OPERATING-REVENUE> 1,186,024
<INCOME-TAX-EXPENSE> 66,250
<OTHER-OPERATING-EXPENSES> 940,770
<TOTAL-OPERATING-EXPENSES> 1,007,020
<OPERATING-INCOME-LOSS> 179,004
<OTHER-INCOME-NET> 11,268
<INCOME-BEFORE-INTEREST-EXPEN> 190,272
<TOTAL-INTEREST-EXPENSE> 84,711
<NET-INCOME> 105,561
4,532
<EARNINGS-AVAILABLE-FOR-COMM> 101,029
<COMMON-STOCK-DIVIDENDS> 78,268
<TOTAL-INTEREST-ON-BONDS> 72,315
<CASH-FLOW-OPERATIONS> 237,662
<EPS-BASIC> 1.19
<EPS-DILUTED> 1.18
</TABLE>