<TABLE> <S> <C>

<ARTICLE>                                  UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEETS, CONSOLIDATED STATEMENTS OF INCOME AND CONSOLIDATED
STATEMENTS OF CASH FLOWS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>                                                   1,000

<S>                                                  <C>
<PERIOD-TYPE>                                        3-MOS
<FISCAL-YEAR-END>                                    DEC-31-1999
<PERIOD-START>                                       APR-01-1999
<PERIOD-END>                                         JUN-30-1999
<BOOK-VALUE>                                         PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                  3,755,693
<OTHER-PROPERTY-AND-INVEST>                                        0
<TOTAL-CURRENT-ASSETS>                                       437,050
<TOTAL-DEFERRED-CHARGES>                                     605,342
<OTHER-ASSETS>                                               126,766
<TOTAL-ASSETS>                                             4,924,851
<COMMON>                                                     762,136
<CAPITAL-SURPLUS-PAID-IN>                                    553,931
<RETAINED-EARNINGS>                                          326,211
<TOTAL-COMMON-STOCKHOLDERS-EQ>                             1,642,278
<PREFERRED-MANDATORY>                                              0
<PREFERRED>                                                   20,687
<LONG-TERM-DEBT-NET>                                       1,220,001
<SHORT-TERM-NOTES>                                           275,739
<LONG-TERM-NOTES-PAYABLE>                                          0
<COMMERCIAL-PAPER-OBLIGATIONS>                                     0
<LONG-TERM-DEBT-CURRENT-PORT>                                 20,000
<PREFERRED-STOCK-CURRENT>                                          0
<CAPITAL-LEASE-OBLIGATIONS>                                        0
<LEASES-CURRENT>                                                   0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                             1,746,146
<TOT-CAPITALIZATION-AND-LIAB>                              4,924,851
<GROSS-OPERATING-REVENUE>                                    530,585
<INCOME-TAX-EXPENSE>                                          25,230
<OTHER-OPERATING-EXPENSES>                                   442,499
<TOTAL-OPERATING-EXPENSES>                                   467,729
<OPERATING-INCOME-LOSS>                                       62,856
<OTHER-INCOME-NET>                                               637
<INCOME-BEFORE-INTEREST-EXPEN>                                63,493
<TOTAL-INTEREST-EXPENSE>                                      24,571
<NET-INCOME>                                                  38,922
<PREFERRED-STOCK-DIVIDENDS>                                      214
<EARNINGS-AVAILABLE-FOR-COMM>                                 38,708
<COMMON-STOCK-DIVIDENDS>                                           0
<TOTAL-INTEREST-ON-BONDS>                                     23,914
<CASH-FLOW-OPERATIONS>                                       265,340
<EPS-BASIC>                                                   0.00
<EPS-DILUTED>                                                   0.00


</TABLE>