<ARTICLE> UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM 10K AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               DEC-31-1999
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    2,550,619
<OTHER-PROPERTY-AND-INVEST>                    358,502
<TOTAL-CURRENT-ASSETS>                       1,043,233
<TOTAL-DEFERRED-CHARGES>                     1,044,544
<OTHER-ASSETS>                                 485,990
<TOTAL-ASSETS>                               5,482,888
<COMMON>                                        58,060
<CAPITAL-SURPLUS-PAID-IN>                    1,075,483
<RETAINED-EARNINGS>                            389,989
<TOTAL-COMMON-STOCKHOLDERS-EQ>               1,523,532
<PREFERRED-MANDATORY>                           49,279
<PREFERRED>                                     43,000
<LONG-TERM-DEBT-NET>                         1,633,402
<SHORT-TERM-NOTES>                             458,000
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                  221,392
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>               1,554,283
<TOT-CAPITALIZATION-AND-LIAB>                5,482,888
<GROSS-OPERATING-REVENUE>                    1,851,427
<INCOME-TAX-EXPENSE>                            87,721
<OTHER-OPERATING-EXPENSES>                   1,500,008
<TOTAL-OPERATING-EXPENSES>                   1,587,729
<OPERATING-INCOME-LOSS>                        263,698
<OTHER-INCOME-NET>                               8,965
<INCOME-BEFORE-INTEREST-EXPEN>                 272,663
<TOTAL-INTEREST-EXPENSE>                       126,200
<NET-INCOME>                                   146,463
<PREFERRED-STOCK-DIVIDENDS>                      5,960
<EARNINGS-AVAILABLE-FOR-COMM>                  140,503
<COMMON-STOCK-DIVIDENDS>                       103,099
<TOTAL-INTEREST-ON-BONDS>                        3,053
<CASH-FLOW-OPERATIONS>                         183,360
<EPS-BASIC>                                       2.77
<EPS-DILUTED>                                     2.76