<TABLE> <S> <C>
<PAGE>
<ARTICLE> UT
<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> 281,549
<OTHER-PROPERTY-AND-INVEST> 0
<TOTAL-CURRENT-ASSETS> 46,510
<TOTAL-DEFERRED-CHARGES> 5,777
<OTHER-ASSETS> 236,073
<TOTAL-ASSETS> 569,909
<COMMON> 0
<CAPITAL-SURPLUS-PAID-IN> 225,667
<RETAINED-EARNINGS> 6,321
<TOTAL-COMMON-STOCKHOLDERS-EQ> 231,988
0
0
<LONG-TERM-DEBT-NET> 120,000
<SHORT-TERM-NOTES> 37,338
<LONG-TERM-NOTES-PAYABLE> 100,000
<COMMERCIAL-PAPER-OBLIGATIONS> 0
<LONG-TERM-DEBT-CURRENT-PORT> 0
0
<CAPITAL-LEASE-OBLIGATIONS> 1,201
<LEASES-CURRENT> 646
<OTHER-ITEMS-CAPITAL-AND-LIAB> 78,916
<TOT-CAPITALIZATION-AND-LIAB> 569,909
<GROSS-OPERATING-REVENUE> 113,053
<INCOME-TAX-EXPENSE> 9,773
<OTHER-OPERATING-EXPENSES> 82,530
<TOTAL-OPERATING-EXPENSES> 92,303
<OPERATING-INCOME-LOSS> 20,750
<OTHER-INCOME-NET> 64
<INCOME-BEFORE-INTEREST-EXPEN> 20,814
<TOTAL-INTEREST-EXPENSE> 8,684
<NET-INCOME> 12,130
0
<EARNINGS-AVAILABLE-FOR-COMM> 12,130
<COMMON-STOCK-DIVIDENDS> 6,039
<TOTAL-INTEREST-ON-BONDS> 4,266
<CASH-FLOW-OPERATIONS> 19,120
<EPS-BASIC> 0.00
<EPS-DILUTED> 0.00
</TABLE>