<ARTICLE> UT    
<MULTIPLIER> 1000    
           
                                 
<PERIOD-TYPE>                   3-MOS    
<FISCAL-YEAR-END>                          DEC-31-1995    
<PERIOD-END>                               MAR-31-1995    
<BOOK-VALUE>                                  PER-BOOK    
<TOTAL-NET-UTILITY-PLANT>                    3,127,816    
<OTHER-PROPERTY-AND-INVEST>                    490,585    
<TOTAL-CURRENT-ASSETS>                         407,200    
<TOTAL-DEFERRED-CHARGES>                       269,801    
<OTHER-ASSETS>                                 391,743    
<TOTAL-ASSETS>                               4,687,145    
<COMMON>                                       291,329    
<CAPITAL-SURPLUS-PAID-IN>                      564,420    
<RETAINED-EARNINGS>                            633,067    
<TOTAL-COMMON-STOCKHOLDERS-EQ>               1,488,816    
<PREFERRED-MANDATORY>                           25,000    
<PREFERRED>                                     93,493    
<LONG-TERM-DEBT-NET>                         1,169,020    
<SHORT-TERM-NOTES>                              37,176    
<LONG-TERM-NOTES-PAYABLE>                      119,597    
<COMMERCIAL-PAPER-OBLIGATIONS>                       0    
<LONG-TERM-DEBT-CURRENT-PORT>                  143,188    
<PREFERRED-STOCK-CURRENT>                            0    
<CAPITAL-LEASE-OBLIGATIONS>                    101,168    
<LEASES-CURRENT>                                 8,433    
<OTHER-ITEMS-CAPITAL-AND-LIAB>               1,501,254    
<TOT-CAPITALIZATION-AND-LIAB>                4,687,145    
<GROSS-OPERATING-REVENUE>                      491,669    
<INCOME-TAX-EXPENSE>                            47,926    
<OTHER-OPERATING-EXPENSES>                     349,931    
<TOTAL-OPERATING-EXPENSES>                     397,857    
<OPERATING-INCOME-LOSS>                         93,812    
<OTHER-INCOME-NET>                             (3,341)    
<INCOME-BEFORE-INTEREST-EXPEN>                  90,471    
<TOTAL-INTEREST-EXPENSE>                        28,621    
<NET-INCOME>                                    61,850    
<PREFERRED-STOCK-DIVIDENDS>                      1,916    
<EARNINGS-AVAILABLE-FOR-COMM>                   59,934    
<COMMON-STOCK-DIVIDENDS>                        45,447    
<TOTAL-INTEREST-ON-BONDS>                       21,584    
<CASH-FLOW-OPERATIONS>                         143,731    
<EPS-PRIMARY>                                     0.51    
<EPS-DILUTED>                                     0.51