<ARTICLE> UT
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               JUN-30-1997
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    1,941,469
<OTHER-PROPERTY-AND-INVEST>                     70,999
<TOTAL-CURRENT-ASSETS>                         237,290
<TOTAL-DEFERRED-CHARGES>                       334,161
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               2,583,919
<COMMON>                                       638,873
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                          (464,205)
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 174,668
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<LONG-TERM-DEBT-NET>                         1,204,967
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                      500
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                    892,020
<LEASES-CURRENT>                                16,427
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 295,337
<TOT-CAPITALIZATION-AND-LIAB>                2,583,919
<GROSS-OPERATING-REVENUE>                      337,251
<INCOME-TAX-EXPENSE>                             1,912
<OTHER-OPERATING-EXPENSES>                     280,719
<TOTAL-OPERATING-EXPENSES>                     282,631
<OPERATING-INCOME-LOSS>                         54,620
<OTHER-INCOME-NET>                              38,561
<INCOME-BEFORE-INTEREST-EXPEN>                  93,181
<TOTAL-INTEREST-EXPENSE>                        51,788
<NET-INCOME>                                    41,393
<PREFERRED-STOCK-DIVIDENDS>                          0
<EARNINGS-AVAILABLE-FOR-COMM>                   41,393
<COMMON-STOCK-DIVIDENDS>                             0
<TOTAL-INTEREST-ON-BONDS>                            0
<CASH-FLOW-OPERATIONS>                          17,424
<EPS-PRIMARY>                                     1.29
<EPS-DILUTED>                                     1.29