<ARTICLE>  UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
(CONSOLIDATED FINANCIAL STATEMENTS AS OF DECEMBER 31, 1998) AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                                                                        
<PERIOD-TYPE>                                                             YEAR
<FISCAL-YEAR-END>                                                  DEC-31-1998
<PERIOD-END>                                                       DEC-31-1998
<BOOK-VALUE>                                                          PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                           $6,299,540
<OTHER-PROPERTY-AND-INVEST>                                           $294,678
<TOTAL-CURRENT-ASSETS>                                                $800,856
<TOTAL-DEFERRED-CHARGES>                                              $381,008
<OTHER-ASSETS>                                                        $571,324
<TOTAL-ASSETS>                                                      $8,347,406
<COMMON>                                                            $1,221,794
<CAPITAL-SURPLUS-PAID-IN>                                               ($790)
<RETAINED-EARNINGS>                                                 $1,728,301
<TOTAL-COMMON-STOCKHOLDERS-EQ>                                      $2,949,305
<PREFERRED-MANDATORY>                                                       $0
<PREFERRED>                                                            $59,376
<LONG-TERM-DEBT-NET>                                                $2,614,414
<SHORT-TERM-NOTES>                                                          $0
<LONG-TERM-NOTES-PAYABLE>                                                   $0
<COMMERCIAL-PAPER-OBLIGATIONS>                                              $0
<LONG-TERM-DEBT-CURRENT-PORT>                                          $53,172
<PREFERRED-STOCK-CURRENT>                                                   $0
<CAPITAL-LEASE-OBLIGATIONS>                                                 $0
<LEASES-CURRENT>                                                            $0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                                      $2,671,139
<TOT-CAPITALIZATION-AND-LIAB>                                       $8,347,406
<GROSS-OPERATING-REVENUE>                                           $3,130,045
<INCOME-TAX-EXPENSE>                                                  $257,494
<OTHER-OPERATING-EXPENSES>                                          $2,232,534
<TOTAL-OPERATING-EXPENSES>                                          $2,490,028
<OPERATING-INCOME-LOSS>                                               $897,511
<OTHER-INCOME-NET>                                                   $(66,543)
<INCOME-BEFORE-INTEREST-EXPEN>                                        $573,474
<TOTAL-INTEREST-EXPENSE>                                              $174,236
<NET-INCOME>                                                          $399,238
<PREFERRED-STOCK-DIVIDENDS>                                           ($2,967)
<EARNINGS-AVAILABLE-FOR-COMM>                                         $396,271
<COMMON-STOCK-DIVIDENDS>                                              $281,852
<TOTAL-INTEREST-ON-BONDS>                                             $128,385
<CASH-FLOW-OPERATIONS>                                                $920,392
<EPS-PRIMARY>                                                             2.75
<EPS-DILUTED>                                                             2.75