<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FINANCIAL
STATEMENTS FOR THE PERIOD ENDED SEPTEMBER 30, 1997 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                           25208
<SECURITIES>                                     10184
<RECEIVABLES>                                    50503
<ALLOWANCES>                                       183
<INVENTORY>                                      13899
<CURRENT-ASSETS>                                107726
<PP&E>                                          734988
<DEPRECIATION>                                  303894
<TOTAL-ASSETS>                                  627743
<CURRENT-LIABILITIES>                            91425
<BONDS>                                         292976
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                          6756
<OTHER-SE>                                      166097
<TOTAL-LIABILITY-AND-EQUITY>                    627743
<SALES>                                              0
<TOTAL-REVENUES>                                292823
<CGS>                                                0
<TOTAL-COSTS>                                   270058
<OTHER-EXPENSES>                                 20879
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               20879
<INCOME-PRETAX>                                   2967
<INCOME-TAX>                                      1292
<INCOME-CONTINUING>                               1675
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                      1675
<EPS-PRIMARY>                                     0.25
<EPS-DILUTED>                                     0.25<F1><F2>
<FN>
<F1>Amounts inapplicable or not disclosed as a separate line on the Balance 
Sheet or Statement of Income are reported as 0 herein.
<F2>Notes and accounts receivable - trade are reported net of allowances for
doubtful accounts in the Balance Sheet.
</FN>