<ARTICLE> UT <MULTIPLIER> 1,000 <PERIOD-TYPE> YEAR <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-END> JUN-30-1996 <BOOK-VALUE> PER-BOOK <TOTAL-NET-UTILITY-PLANT> 3,120,930 <OTHER-PROPERTY-AND-INVEST> 591,584 <TOTAL-CURRENT-ASSETS> 462,249 <TOTAL-DEFERRED-CHARGES> 131,176 <OTHER-ASSETS> 435,337 <TOTAL-ASSETS> 4,741,276 <COMMON> 291,414 <CAPITAL-SURPLUS-PAID-IN> 565,455 <RETAINED-EARNINGS> 685,048 <TOTAL-COMMON-STOCKHOLDERS-EQ> 1,541,917 <PREFERRED-MANDATORY> 25,000 <PREFERRED> 78,475 <LONG-TERM-DEBT-NET> 1,095,051 <SHORT-TERM-NOTES> 0 <LONG-TERM-NOTES-PAYABLE> 149,364 <COMMERCIAL-PAPER-OBLIGATIONS> 0 <LONG-TERM-DEBT-CURRENT-PORT> 177,895 <PREFERRED-STOCK-CURRENT> 0 <CAPITAL-LEASE-OBLIGATIONS> 88,277 <LEASES-CURRENT> 8,544 <OTHER-ITEMS-CAPITAL-AND-LIAB> 1,576,753 <TOT-CAPITALIZATION-AND-LIAB> 4,741,276 <GROSS-OPERATING-REVENUE> 936,864 <INCOME-TAX-EXPENSE> 82,482 <OTHER-OPERATING-EXPENSES> 686,865 <TOTAL-OPERATING-EXPENSES> 769,347 <OPERATING-INCOME-LOSS> 167,517 <OTHER-INCOME-NET> 1,179 <INCOME-BEFORE-INTEREST-EXPEN> 168,696 <TOTAL-INTEREST-EXPENSE> 55,294 <F1> <NET-INCOME> 113,402 <PREFERRED-STOCK-DIVIDENDS> 0 <F1> <EARNINGS-AVAILABLE-FOR-COMM> 113,402 <COMMON-STOCK-DIVIDENDS> 90,920 <TOTAL-INTEREST-ON-BONDS> 44,433 <CASH-FLOW-OPERATIONS> 270,465 <EPS-PRIMARY> 0.97 <EPS-DILUTED> 0.97 <FN> <F1> PREFERRED DIVIDEND OF SUBSIDIARY INCLUDED IN INTEREST EXPENSE