<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          14,348
<SECURITIES>                                         0
<RECEIVABLES>                                  118,893
<ALLOWANCES>                                     1,190
<INVENTORY>                                     17,901
<CURRENT-ASSETS>                               163,328
<PP&E>                                       2,719,465
<DEPRECIATION>                               1,245,462
<TOTAL-ASSETS>                               1,776,130
<CURRENT-LIABILITIES>                          180,193
<BONDS>                                        987,277
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         1,007
<OTHER-SE>                                     569,365
<TOTAL-LIABILITY-AND-EQUITY>                 1,776,130
<SALES>                                        273,965
<TOTAL-REVENUES>                               275,090
<CGS>                                                0
<TOTAL-COSTS>                                   74,230
<OTHER-EXPENSES>                               365,890
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              21,941
<INCOME-PRETAX>                              (246,488)
<INCOME-TAX>                                  (83,509)
<INCOME-CONTINUING>                          (162,979)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 (162,979)
<EPS-PRIMARY>                                   (1.62)
<EPS-DILUTED>                                   (1.62)