<ARTICLE> UT <MULTIPLIER> 1,000 <PERIOD-TYPE> YEAR <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-END> DEC-30-1997 <BOOK-VALUE> PER-BOOK <TOTAL-NET-UTILITY-PLANT> 2,936,084 <OTHER-PROPERTY-AND-INVEST> 939,635 <TOTAL-CURRENT-ASSETS> 1,040,036 <TOTAL-DEFERRED-CHARGES> 121,407 <OTHER-ASSETS> 196,762 <TOTAL-ASSETS> 5,233,924 <COMMON> 284,087 <CAPITAL-SURPLUS-PAID-IN> 501,486 <RETAINED-EARNINGS> 784,810 <TOTAL-COMMON-STOCKHOLDERS-EQ> 1,570,383 <PREFERRED-MANDATORY> 25,000 <PREFERRED> 78,475 <LONG-TERM-DEBT-NET> 1,699,245 <SHORT-TERM-NOTES> 0 <LONG-TERM-NOTES-PAYABLE> 269,210 <COMMERCIAL-PAPER-OBLIGATIONS> 0 <LONG-TERM-DEBT-CURRENT-PORT> 114,977 <PREFERRED-STOCK-CURRENT> 0 <CAPITAL-LEASE-OBLIGATIONS> 88,578 <LEASES-CURRENT> 6,723 <OTHER-ITEMS-CAPITAL-AND-LIAB> 1,381,333 <TOT-CAPITALIZATION-AND-LIAB> 5,233,924 <GROSS-OPERATING-REVENUE> 2,217,007 <INCOME-TAX-EXPENSE> 160,161 <OTHER-OPERATING-EXPENSES> 1,712,676 <TOTAL-OPERATING-EXPENSES> 1,872,837 <OPERATING-INCOME-LOSS> 344,170 <OTHER-INCOME-NET> 16,804 <INCOME-BEFORE-INTEREST-EXPEN> 360,974 <TOTAL-INTEREST-EXPENSE> 109,367 <F1> <NET-INCOME> 251,607 <PREFERRED-STOCK-DIVIDENDS> 0 <F1> <EARNINGS-AVAILABLE-FOR-COMM> 251,607 <COMMON-STOCK-DIVIDENDS> 178,423 <TOTAL-INTEREST-ON-BONDS> 69,545 <CASH-FLOW-OPERATIONS> 539,141 <EPS-PRIMARY> 2.20 <EPS-DILUTED> 2.20 <FN> <F1> PREFERRED DIVIDEND OF SUBSIDIARY INCLUDED IN INTEREST EXPENSE