<ARTICLE> 5
<LEGEND>
THIS 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>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               SEP-30-1999
<CASH>                                          97,583
<SECURITIES>                                         0
<RECEIVABLES>                                   25,872
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               137,944
<PP&E>                                       1,070,388
<DEPRECIATION>                               (597,970)
<TOTAL-ASSETS>                                 641,408
<CURRENT-LIABILITIES>                           62,596
<BONDS>                                        205,634
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                         16
<COMMON>                                           425
<OTHER-SE>                                     338,062
<TOTAL-LIABILITY-AND-EQUITY>                   641,408
<SALES>                                              0
<TOTAL-REVENUES>                               133,625
<CGS>                                                0
<TOTAL-COSTS>                                  167,194
<OTHER-EXPENSES>                                    57
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              12,707
<INCOME-PRETAX>                               (41,835)
<INCOME-TAX>                                     2,287
<INCOME-CONTINUING>                           (53,060)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (53,060)
<EPS-BASIC>                                     (1.26)
<EPS-DILUTED>                                   (1.26)