<ARTICLE> UT <MULTIPLIER> 1,000 <PERIOD-TYPE> YEAR <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-END> JUN-30-1998 <BOOK-VALUE> PER-BOOK <TOTAL-NET-UTILITY-PLANT> 2,298,431 <OTHER-PROPERTY-AND-INVEST> 451,780 <TOTAL-CURRENT-ASSETS> 705,652 <TOTAL-DEFERRED-CHARGES> 792,267 <OTHER-ASSETS> 7,840 <TOTAL-ASSETS> 4,255,970 <COMMON> 291,458 <CAPITAL-SURPLUS-PAID-IN> 566,233 <RETAINED-EARNINGS> 415,162 <TOTAL-COMMON-STOCKHOLDERS-EQ> 1,272,853 <PREFERRED-MANDATORY> 25,000 <PREFERRED> 78,475 <LONG-TERM-DEBT-NET> 1,534,857 <SHORT-TERM-NOTES> 8,400 <LONG-TERM-NOTES-PAYABLE> 0 <COMMERCIAL-PAPER-OBLIGATIONS> 0 <LONG-TERM-DEBT-CURRENT-PORT> 65,861 <PREFERRED-STOCK-CURRENT> 0 <CAPITAL-LEASE-OBLIGATIONS> 77,764 <LEASES-CURRENT> 6,779 <OTHER-ITEMS-CAPITAL-AND-LIAB> 1,185,981 <TOT-CAPITALIZATION-AND-LIAB> 4,255,970 <GROSS-OPERATING-REVENUE> 1,288,834 <INCOME-TAX-EXPENSE> 50,966 <OTHER-OPERATING-EXPENSES> 1,115,770 <TOTAL-OPERATING-EXPENSES> 1,166,736 <OPERATING-INCOME-LOSS> 122,098 <OTHER-INCOME-NET> 14,500 <INCOME-BEFORE-INTEREST-EXPEN> 136,598 <TOTAL-INTEREST-EXPENSE> 59,235 <NET-INCOME> 77,363 <PREFERRED-STOCK-DIVIDENDS> 3,291 <EARNINGS-AVAILABLE-FOR-COMM> 74,072 <COMMON-STOCK-DIVIDENDS> 136,195 <TOTAL-INTEREST-ON-BONDS> 0 <CASH-FLOW-OPERATIONS> 160,112 <EPS-PRIMARY> 0 <EPS-DILUTED> 0