<ARTICLE> UT
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               MAR-31-1999
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    2,254,288
<OTHER-PROPERTY-AND-INVEST>                    328,815
<TOTAL-CURRENT-ASSETS>                         439,364
<TOTAL-DEFERRED-CHARGES>                       190,108
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               3,212,575
<COMMON>                                        46,405
<CAPITAL-SURPLUS-PAID-IN>                      615,463
<RETAINED-EARNINGS>                            356,045
<TOTAL-COMMON-STOCKHOLDERS-EQ>               1,028,641
<PREFERRED-MANDATORY>                           49,100
<PREFERRED>                                     43,000
<LONG-TERM-DEBT-NET>                           890,511
<SHORT-TERM-NOTES>                             101,000
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                   65,267
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>               1,035,056
<TOT-CAPITALIZATION-AND-LIAB>                3,212,575
<GROSS-OPERATING-REVENUE>                      371,870
<INCOME-TAX-EXPENSE>                            14,046
<OTHER-OPERATING-EXPENSES>                     314,095
<TOTAL-OPERATING-EXPENSES>                     328,141
<OPERATING-INCOME-LOSS>                         43,729
<OTHER-INCOME-NET>                              (2,485)
<INCOME-BEFORE-INTEREST-EXPEN>                  41,244
<TOTAL-INTEREST-EXPENSE>                        21,682
<NET-INCOME>                                    19,562
<PREFERRED-STOCK-DIVIDENDS>                      1,490
<EARNINGS-AVAILABLE-FOR-COMM>                   18,072
<COMMON-STOCK-DIVIDENDS>                        22,477
<TOTAL-INTEREST-ON-BONDS>                            0
<CASH-FLOW-OPERATIONS>                          68,319
<EPS-PRIMARY>                                     0.38
<EPS-DILUTED>                                     0.38