
<TABLE> <S> <C>

<ARTICLE> UT

<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               DEC-31-1999
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    4,778,515
<OTHER-PROPERTY-AND-INVEST>                    611,751
<TOTAL-CURRENT-ASSETS>                         498,794
<TOTAL-DEFERRED-CHARGES>                       719,446
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               6,608,506
<COMMON>                                     1,537,449
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                            668,284
<TOTAL-COMMON-STOCKHOLDERS-EQ>               2,205,733
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<LONG-TERM-DEBT-NET>                         2,206,052
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                  38,300
<LONG-TERM-DEBT-CURRENT-PORT>                  114,798
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>               2,043,623
<TOT-CAPITALIZATION-AND-LIAB>                6,608,506
<GROSS-OPERATING-REVENUE>                    2,423,353
<INCOME-TAX-EXPENSE>                           168,065
<OTHER-OPERATING-EXPENSES>                   1,048,467
<TOTAL-OPERATING-EXPENSES>                   1,844,576
<OPERATING-INCOME-LOSS>                        578,777
<OTHER-INCOME-NET>                               9,777
<INCOME-BEFORE-INTEREST-EXPEN>                       0
<TOTAL-INTEREST-EXPENSE>                       150,717
<NET-INCOME>                                   167,887
<PREFERRED-STOCK-DIVIDENDS>                          0
<EARNINGS-AVAILABLE-FOR-COMM>                  167,887
<COMMON-STOCK-DIVIDENDS>                       112,311
<TOTAL-INTEREST-ON-BONDS>                      107,635
<CASH-FLOW-OPERATIONS>                         635,600
<EPS-BASIC>                                       1.98
<EPS-DILUTED>                                     1.97


</TABLE>
