<ARTICLE> UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
(CONSOLIDATED FINANCIAL STATEMENTS AS OF SEPTEMBER 30, 1999) AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               SEP-30-1999
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                   $6,698,935
<OTHER-PROPERTY-AND-INVEST>                   $420,923
<TOTAL-CURRENT-ASSETS>                      $1,031,900
<TOTAL-DEFERRED-CHARGES>                      $319,230
<OTHER-ASSETS>                                $824,135
<TOTAL-ASSETS>                              $9,295,123
<COMMON>                                    $1,603,444
<CAPITAL-SURPLUS-PAID-IN>                       ($793)
<RETAINED-EARNINGS>                         $1,807,987
<TOTAL-COMMON-STOCKHOLDERS-EQ>              $3,410,638
<PREFERRED-MANDATORY>                               $0
<PREFERRED>                                    $59,376
<LONG-TERM-DEBT-NET>                        $2,800,068
<SHORT-TERM-NOTES>                            $100,000
<LONG-TERM-NOTES-PAYABLE>                           $0
<COMMERCIAL-PAPER-OBLIGATIONS>                      $0
<LONG-TERM-DEBT-CURRENT-PORT>                 $150,000
<PREFERRED-STOCK-CURRENT>                           $0
<CAPITAL-LEASE-OBLIGATIONS>                         $0
<LEASES-CURRENT>                                    $0
<OTHER-ITEMS-CAPITAL-AND-LIAB>              $2,775,041
<TOT-CAPITALIZATION-AND-LIAB>               $9,295,123
<GROSS-OPERATING-REVENUE>                   $2,550,480
<INCOME-TAX-EXPENSE>                          $204,275
<OTHER-OPERATING-EXPENSES>                  $1,884,738
<TOTAL-OPERATING-EXPENSES>                  $2,089,013
<OPERATING-INCOME-LOSS>                       $665,742
<OTHER-INCOME-NET>                           ($24,827)
<INCOME-BEFORE-INTEREST-EXPEN>                $436,640
<TOTAL-INTEREST-EXPENSE>                      $133,415
<NET-INCOME>                                  $303,225
<PREFERRED-STOCK-DIVIDENDS>                   ($2,225)
<EARNINGS-AVAILABLE-FOR-COMM>                 $301,000
<COMMON-STOCK-DIVIDENDS>                      $221,312
<TOTAL-INTEREST-ON-BONDS>                     $101,642
<CASH-FLOW-OPERATIONS>                        $689,855
<EPS-BASIC>                                      $2.05
<EPS-DILUTED>                                    $2.05