<ARTICLE> UT
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               MAR-31-1998
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    2,783,134
<OTHER-PROPERTY-AND-INVEST>                    433,056 
<TOTAL-CURRENT-ASSETS>                         947,350
<TOTAL-DEFERRED-CHARGES>                       123,207
<OTHER-ASSETS>                                 298,052
<TOTAL-ASSETS>                               4,584,799
<COMMON>                                       291,458
<CAPITAL-SURPLUS-PAID-IN>                      566,233
<RETAINED-EARNINGS>                            433,948
<TOTAL-COMMON-STOCKHOLDERS-EQ>               1,291,639
<PREFERRED-MANDATORY>                           25,000
<PREFERRED>                                     78,475
<LONG-TERM-DEBT-NET>                         1,682,952
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                   65,852
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                     83,823
<LEASES-CURRENT>                                 6,751
<OTHER-ITEMS-CAPITAL-AND-LIAB>               1,350,307
<TOT-CAPITALIZATION-AND-LIAB>                4,584,799
<GROSS-OPERATING-REVENUE>                      605,853
<INCOME-TAX-EXPENSE>                            29,435
<OTHER-OPERATING-EXPENSES>                     499,428
<TOTAL-OPERATING-EXPENSES>                     528,863
<OPERATING-INCOME-LOSS>                         76,990
<OTHER-INCOME-NET>                               4,361
<INCOME-BEFORE-INTEREST-EXPEN>                  81,351
<TOTAL-INTEREST-EXPENSE>                        31,128
<NET-INCOME>                                    50,223
<PREFERRED-STOCK-DIVIDENDS>                      1,646
<EARNINGS-AVAILABLE-FOR-COMM>                   48,577
<COMMON-STOCK-DIVIDENDS>                        45,963
<TOTAL-INTEREST-ON-BONDS>                       27,314
<CASH-FLOW-OPERATIONS>                         189,546
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0