<ARTICLE> UT
<MULTIPLIER> 1,000

                             
<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>                    1,318,290
<OTHER-PROPERTY-AND-INVEST>                  1,103,158
<TOTAL-CURRENT-ASSETS>                         519,391
<TOTAL-DEFERRED-CHARGES>                     1,099,752
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               4,040,591
<COMMON>                                        73,119
<CAPITAL-SURPLUS-PAID-IN>                      931,464
<RETAINED-EARNINGS>                            960,479
<TOTAL-COMMON-STOCKHOLDERS-EQ>               1,017,750<F1>
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                    248,248<F2>
<LONG-TERM-DEBT-NET>                         1,422,987
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                        3,194
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                   77,614
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                     11,024
<LEASES-CURRENT>                                   755
<OTHER-ITEMS-CAPITAL-AND-LIAB>               1,259,019
<TOT-CAPITALIZATION-AND-LIAB>                4,040,591
<GROSS-OPERATING-REVENUE>                      649,575
<INCOME-TAX-EXPENSE>                             9,532<F3>
<OTHER-OPERATING-EXPENSES>                     585,517
<TOTAL-OPERATING-EXPENSES>                     585,517
<OPERATING-INCOME-LOSS>                         64,058
<OTHER-INCOME-NET>                              70,761
<INCOME-BEFORE-INTEREST-EXPEN>                 134,819
<TOTAL-INTEREST-EXPENSE>                        65,236<F4>
<NET-INCOME>                                    60,051
<PREFERRED-STOCK-DIVIDENDS>                      (542)
<EARNINGS-AVAILABLE-FOR-COMM>                   60,593
<COMMON-STOCK-DIVIDENDS>                        53,357
<TOTAL-INTEREST-ON-BONDS>                       38,893
<CASH-FLOW-OPERATIONS>                         130,289
<EPS-BASIC>                                       0.87
<EPS-DILUTED>                                     0.85
<FN>
<F1>Includes $(947,312) of Treasury Stock at cost.
<F2>Includes $11,420 of Preference Stock.
<F3>Non-operating Expense.
<F4>Includes $8,007 of Preferred and Preference Stock Dividends.
</FN>