<ARTICLE> 5
<LEGEND>
THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM APPLICABLE
FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                                 YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                           3,790
<SECURITIES>                                         0
<RECEIVABLES>                                   57,925
<ALLOWANCES>                                     1,161
<INVENTORY>                                          0
<CURRENT-ASSETS>                                73,260
<PP&E>                                       1,901,678
<DEPRECIATION>                              (1,192,691)
<TOTAL-ASSETS>                                 807,789
<CURRENT-LIABILITIES>                          132,065
<BONDS>                                        258,317
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         1,271
<OTHER-SE>                                     273,392
<TOTAL-LIABILITY-AND-EQUITY>                   807,789
<SALES>                                              0
<TOTAL-REVENUES>                               314,213
<CGS>                                                0
<TOTAL-COSTS>                                  554,566
<OTHER-EXPENSES>                                  (301)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              30,645
<INCOME-PRETAX>                               (270,123)
<INCOME-TAX>                                   (58,945)
<INCOME-CONTINUING>                           (216,103)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (216,103)
<EPS-PRIMARY>                                    (1.71)
<EPS-DILUTED>                                    (1.71)