<ARTICLE> 5
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1998
<PERIOD-START>                             APR-01-1998             JAN-01-1998
<PERIOD-END>                               JUN-30-1998             JUN-30-1998
<CASH>                                           6,364                   6,364
<SECURITIES>                                         0                       0
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<PP&E>                                       1,157,127               1,157,127
<DEPRECIATION>                               (371,247)               (371,247)
<TOTAL-ASSETS>                                 851,387                 851,387
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<BONDS>                                        377,051                 377,051
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<PREFERRED>                                          0                       0
<COMMON>                                           203                     203
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<TOTAL-LIABILITY-AND-EQUITY>                   851,387                 851,387
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<TOTAL-REVENUES>                                61,657                 129,318
<CGS>                                           36,096                  73,133
<TOTAL-COSTS>                                   57,870                 119,689
<OTHER-EXPENSES>                                 7,281                  15,953
<LOSS-PROVISION>                                     0                       0
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<INCOME-PRETAX>                               (12,765)                (24,074)
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<CHANGES>                                            0                       0
<NET-INCOME>                                   (7,622)                (14,204)
<EPS-PRIMARY>                                    (.39)                   (.72)
<EPS-DILUTED>                                    (.39)                   (.72)