<ARTICLE>                                           UT
<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>                      521,465
<OTHER-PROPERTY-AND-INVEST>                    131,847
<TOTAL-CURRENT-ASSETS>                         220,126
<TOTAL-DEFERRED-CHARGES>                       924,772
<OTHER-ASSETS>                                 0
<TOTAL-ASSETS>                                 1,798,210
<COMMON>                                       282,745
<CAPITAL-SURPLUS-PAID-IN>                      83
<RETAINED-EARNINGS>                            175,470
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 458,298
<PREFERRED-MANDATORY>                          0
<PREFERRED>                                    0
<LONG-TERM-DEBT-NET>                           518,228
<SHORT-TERM-NOTES>                             0
<LONG-TERM-NOTES-PAYABLE>                      17,131
<COMMERCIAL-PAPER-OBLIGATIONS>                 0
<LONG-TERM-DEBT-CURRENT-PORT>                  25,000
<PREFERRED-STOCK-CURRENT>                      0
<CAPITAL-LEASE-OBLIGATIONS>                    16,131
<LEASES-CURRENT>                               375
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 763,047
<TOT-CAPITALIZATION-AND-LIAB>                  1,798,210
<GROSS-OPERATING-REVENUE>                      679,975
<INCOME-TAX-EXPENSE>                           66,564
<OTHER-OPERATING-EXPENSES>                     519,856
<TOTAL-OPERATING-EXPENSES>                     586,420
<OPERATING-INCOME-LOSS>                        93,555
<OTHER-INCOME-NET>                             4,401
<INCOME-BEFORE-INTEREST-EXPEN>                 97,956
<TOTAL-INTEREST-EXPENSE>                       45,732
<NET-INCOME>                                   52,224
<PREFERRED-STOCK-DIVIDENDS>                    66
<EARNINGS-AVAILABLE-FOR-COMM>                  52,105
<COMMON-STOCK-DIVIDENDS>                       40,470
<TOTAL-INTEREST-ON-BONDS>                      33,204
<CASH-FLOW-OPERATIONS>                         98,473
<EPS-BASIC>                                    3.71
<EPS-DILUTED>                                  3.71