<ARTICLE> UT
<LEGEND>
This schedule contains summary financial information extracted from the
Consolidated Balance Sheet at 09/30/99, the Consolidated Income
Statement and the Consolidated Statement of Cash Flows for the twelve
months ended 09/30/99 and is qualified in its entirety by reference to
such financial statements.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               SEP-30-1999
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    1,511,795
<OTHER-PROPERTY-AND-INVEST>                    787,963
<TOTAL-CURRENT-ASSETS>                         379,911
<TOTAL-DEFERRED-CHARGES>                       369,539
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               3,049,208
<COMMON>                                       703,647
<CAPITAL-SURPLUS-PAID-IN>                        2,134
<RETAINED-EARNINGS>                            407,796
<TOTAL-COMMON-STOCKHOLDERS-EQ>               1,113,577
<PREFERRED-MANDATORY>                           65,000
<PREFERRED>                                     57,654
<LONG-TERM-DEBT-NET>                           650,213
<SHORT-TERM-NOTES>                              37,600
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                   79,981
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                        220
<LEASES-CURRENT>                                   416
<OTHER-ITEMS-CAPITAL-AND-LIAB>               1,044,547
<TOT-CAPITALIZATION-AND-LIAB>                3,049,208
<GROSS-OPERATING-REVENUE>                      966,956
<INCOME-TAX-EXPENSE>                            40,702
<OTHER-OPERATING-EXPENSES>                     801,232
<TOTAL-OPERATING-EXPENSES>                     841,934
<OPERATING-INCOME-LOSS>                        125,022
<OTHER-INCOME-NET>                               6,371
<INCOME-BEFORE-INTEREST-EXPEN>                 131,393
<TOTAL-INTEREST-EXPENSE>                        43,108
<NET-INCOME>                                    88,285
<PREFERRED-STOCK-DIVIDENDS>                      2,768
<EARNINGS-AVAILABLE-FOR-COMM>                   85,517
<COMMON-STOCK-DIVIDENDS>                        22,040
<TOTAL-INTEREST-ON-BONDS>                            0
<CASH-FLOW-OPERATIONS>                         287,671
<EPS-BASIC>                                        .78
<EPS-DILUTED>                                      .77