<ARTICLE> UT
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               DEC-31-1998
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    2,270,668
<OTHER-PROPERTY-AND-INVEST>                    203,706
<TOTAL-CURRENT-ASSETS>                         430,322
<TOTAL-DEFERRED-CHARGES>                       199,782
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               3,104,478
<COMMON>                                             0
<CAPITAL-SURPLUS-PAID-IN>                      742,544
<RETAINED-EARNINGS>                            297,347
<TOTAL-COMMON-STOCKHOLDERS-EQ>               1,039,891
<PREFERRED-MANDATORY>                           49,040
<PREFERRED>                                     43,000
<LONG-TERM-DEBT-NET>                           955,563
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                      667
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>               1,016,317
<TOT-CAPITALIZATION-AND-LIAB>                3,104,478
<GROSS-OPERATING-REVENUE>                    1,622,972
<INCOME-TAX-EXPENSE>                           100,492
<OTHER-OPERATING-EXPENSES>                   1,272,756
<TOTAL-OPERATING-EXPENSES>                   1,373,248
<OPERATING-INCOME-LOSS>                        249,724
<OTHER-INCOME-NET>                             (2,941)
<INCOME-BEFORE-INTEREST-EXPEN>                 246,783
<TOTAL-INTEREST-EXPENSE>                        89,446
<NET-INCOME>                                   157,337
<PREFERRED-STOCK-DIVIDENDS>                      8,765
<EARNINGS-AVAILABLE-FOR-COMM>                        0
<COMMON-STOCK-DIVIDENDS>                        22,802
<TOTAL-INTEREST-ON-BONDS>                        3,166
<CASH-FLOW-OPERATIONS>                         278,694
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0