<ARTICLE>                     UT
<LEGEND>
This  schedule  contains  summary  financial   information  extracted  from  the
Statement of Income, Balance Sheet and Statement of Cash Flows, and is qualified
in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER>                                   1000

                                            
<PERIOD-TYPE>                                  6-MOS
<FISCAL-YEAR-END>                              DEC-31-1999
<PERIOD-END>                                   JUN-30-1999
<BOOK-VALUE>                                   PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                      4,045,251
<OTHER-PROPERTY-AND-INVEST>                      308,578
<TOTAL-CURRENT-ASSETS>                         1,089,976
<TOTAL-DEFERRED-CHARGES>                         941,373
<OTHER-ASSETS>                                         0
<TOTAL-ASSETS>                                 6,385,178
<COMMON>                                           1,402
<CAPITAL-SURPLUS-PAID-IN>                      2,425,538
<RETAINED-EARNINGS>                              501,025
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 2,927,965
<PREFERRED-MANDATORY>                            363,000
<PREFERRED>                                       84,485
<LONG-TERM-DEBT-NET>                           1,637,491
<SHORT-TERM-NOTES>                                     0
<LONG-TERM-NOTES-PAYABLE>                              0
<COMMERCIAL-PAPER-OBLIGATIONS>                         0
<LONG-TERM-DEBT-CURRENT-PORT>                      1,000
<PREFERRED-STOCK-CURRENT>                              0
<CAPITAL-LEASE-OBLIGATIONS>                            0
<LEASES-CURRENT>                                       0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 1,371,237
<TOT-CAPITALIZATION-AND-LIAB>                  6,385,178
<GROSS-OPERATING-REVENUE>                        539,362
<INCOME-TAX-EXPENSE>                              10,380
<OTHER-OPERATING-EXPENSES>                       477,785
<TOTAL-OPERATING-EXPENSES>                       488,165
<OPERATING-INCOME-LOSS>                           51,197
<OTHER-INCOME-NET>                                 5,548
<INCOME-BEFORE-INTEREST-EXPEN>                    56,745
<TOTAL-INTEREST-EXPENSE>                          33,756
<NET-INCOME>                                      22,989
<PREFERRED-STOCK-DIVIDENDS>                        8,690
<EARNINGS-AVAILABLE-FOR-COMM>                     14,299
<COMMON-STOCK-DIVIDENDS>                          63,323
<TOTAL-INTEREST-ON-BONDS>                         34,290
<CASH-FLOW-OPERATIONS>                           199,049
<EPS-BASIC>                                       0.10
<EPS-DILUTED>                                       0.10