<TABLE> <S> <C>

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

<S>                                                                                                     <C>
<PERIOD-TYPE>                                                                                         6-MOS
<FISCAL-YEAR-END>                                                                               DEC-31-1998
<PERIOD-END>                                                                                    JUN-30-1999
<BOOK-VALUE>                                                                                       PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                                                        $6,337,560
<OTHER-PROPERTY-AND-INVEST>                                                                        $398,087
<TOTAL-CURRENT-ASSETS>                                                                             $898,488
<TOTAL-DEFERRED-CHARGES>                                                                           $337,268
<OTHER-ASSETS>                                                                                    $594,714
<TOTAL-ASSETS>                                                                                   $8,566,117
<COMMON>                                                                                         $1,238,889
<CAPITAL-SURPLUS-PAID-IN>                                                                            ($790)
<RETAINED-EARNINGS>                                                                              $1,737,466
<TOTAL-COMMON-STOCKHOLDERS-EQ>                                                                   $2,975,565
<PREFERRED-MANDATORY>                                                                                    $0
<PREFERRED>                                                                                         $59,376
<LONG-TERM-DEBT-NET>                                                                             $2,716,447
<SHORT-TERM-NOTES>                                                                                       $0
<LONG-TERM-NOTES-PAYABLE>                                                                                $0
<COMMERCIAL-PAPER-OBLIGATIONS>                                                                           $0
<LONG-TERM-DEBT-CURRENT-PORT>                                                                      $201,610
<PREFERRED-STOCK-CURRENT>                                                                                $0
<CAPITAL-LEASE-OBLIGATIONS>                                                                              $0
<LEASES-CURRENT>                                                                                         $0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                                                                   $2,613,119
<TOT-CAPITALIZATION-AND-LIAB>                                                                    $8,566,117
<GROSS-OPERATING-REVENUE>                                                                        $1,525,724
<INCOME-TAX-EXPENSE>                                                                               $103,320
<OTHER-OPERATING-EXPENSES>                                                                       $1,168,945
<TOTAL-OPERATING-EXPENSES>                                                                       $1,272,265
<OPERATING-INCOME-LOSS>                                                                            $356,779
<OTHER-INCOME-NET>                                                                                ($10,683)
<INCOME-BEFORE-INTEREST-EXPEN>                                                                     $242,776
<TOTAL-INTEREST-EXPENSE>                                                                            $87,405
<NET-INCOME>                                                                                       $155,371
<PREFERRED-STOCK-DIVIDENDS>                                                                        ($1,483)
<EARNINGS-AVAILABLE-FOR-COMM>                                                                      $153,888
<COMMON-STOCK-DIVIDENDS>                                                                           $144,721
<TOTAL-INTEREST-ON-BONDS>                                                                           $66,701
<CASH-FLOW-OPERATIONS>                                                                             $416,936
<EPS-BASIC>                                                                                          1.07
<EPS-DILUTED>                                                                                          1.06


</TABLE>