<ARTICLE> UT
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               JUN-30-1996
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    3,120,930
<OTHER-PROPERTY-AND-INVEST>                    314,176
<TOTAL-CURRENT-ASSETS>                         347,169
<TOTAL-DEFERRED-CHARGES>                       127,297
<OTHER-ASSETS>                                 383,178
<TOTAL-ASSETS>                               4,292,750
<COMMON>                                       291,458
<CAPITAL-SURPLUS-PAID-IN>                      566,233
<RETAINED-EARNINGS>                            526,661
<TOTAL-COMMON-STOCKHOLDERS-EQ>               1,384,352
<PREFERRED-MANDATORY>                           25,000
<PREFERRED>                                     78,475
<LONG-TERM-DEBT-NET>                         1,095,051
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                  140,337
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                     88,277
<LEASES-CURRENT>                                 8,544
<OTHER-ITEMS-CAPITAL-AND-LIAB>               1,472,714
<TOT-CAPITALIZATION-AND-LIAB>                4,292,750
<GROSS-OPERATING-REVENUE>                      910,163
<INCOME-TAX-EXPENSE>                           105,252
<OTHER-OPERATING-EXPENSES>                     650,899
<TOTAL-OPERATING-EXPENSES>                     756,151
<OPERATING-INCOME-LOSS>                        154,012
<OTHER-INCOME-NET>                                 512
<INCOME-BEFORE-INTEREST-EXPEN>                 154,524
<TOTAL-INTEREST-EXPENSE>                        45,780
<NET-INCOME>                                   108,744
<PREFERRED-STOCK-DIVIDENDS>                      3,291
<EARNINGS-AVAILABLE-FOR-COMM>                  105,453
<COMMON-STOCK-DIVIDENDS>                        90,920
<TOTAL-INTEREST-ON-BONDS>                       38,210
<CASH-FLOW-OPERATIONS>                         255,348
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0