<ARTICLE> UT

                             
<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>                    4,835,278
<OTHER-PROPERTY-AND-INVEST>                    644,877
<TOTAL-CURRENT-ASSETS>                         715,084
<TOTAL-DEFERRED-CHARGES>                       648,509
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               6,843,748
<COMMON>                                     1,537,652
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                            752,946
<TOTAL-COMMON-STOCKHOLDERS-EQ>               2,290,598
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<LONG-TERM-DEBT-NET>                         2,075,951
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                 200,875
<LONG-TERM-DEBT-CURRENT-PORT>                  114,886
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>               2,161,438
<TOT-CAPITALIZATION-AND-LIAB>                6,843,748
<GROSS-OPERATING-REVENUE>                    1,244,665
<INCOME-TAX-EXPENSE>                           106,428
<OTHER-OPERATING-EXPENSES>                     531,459
<TOTAL-OPERATING-EXPENSES>                     947,241
<OPERATING-INCOME-LOSS>                        297,424
<OTHER-INCOME-NET>                              28,563
<INCOME-BEFORE-INTEREST-EXPEN>                       0
<TOTAL-INTEREST-EXPENSE>                        75,588
<NET-INCOME>                                   143,971
<PREFERRED-STOCK-DIVIDENDS>                          0
<EARNINGS-AVAILABLE-FOR-COMM>                  143,971
<COMMON-STOCK-DIVIDENDS>                        59,307
<TOTAL-INTEREST-ON-BONDS>                       47,150
<CASH-FLOW-OPERATIONS>                         310,984
<EPS-BASIC>                                       1.70
<EPS-DILUTED>                                     1.70