<ARTICLE>                                   5
<MULTIPLIER>                                1,000
<CURRENCY>                                  U.S. Dollars

                                         
<PERIOD-TYPE>                               6-MOS
<FISCAL-YEAR-END>                           DEC-31-2000
<PERIOD-START>                              JAN-01-2000
<PERIOD-END>                                JUN-30-2000
<EXCHANGE-RATE>                             1
<CASH>                                      52,369
<SECURITIES>                                0
<RECEIVABLES>                               23,032
<ALLOWANCES>                                166
<INVENTORY>                                 430
<CURRENT-ASSETS>                            79,142
<PP&E>                                      340,354
<DEPRECIATION>                              64,013
<TOTAL-ASSETS>                              423,687
<CURRENT-LIABILITIES>                       84,040
<BONDS>                                     0
<COMMON>                                    71,634
<PREFERRED-MANDATORY>                       0
<PREFERRED>                                 0
<OTHER-SE>                                  76,049
<TOTAL-LIABILITY-AND-EQUITY>                423,687
<SALES>                                     157,583
<TOTAL-REVENUES>                            157,583
<CGS>                                       120,672
<TOTAL-COSTS>                               133,635
<OTHER-EXPENSES>                            (90)
<LOSS-PROVISION>                            0
<INTEREST-EXPENSE>                          7,671
<INCOME-PRETAX>                             16,367
<INCOME-TAX>                                6,792
<INCOME-CONTINUING>                         9,575
<DISCONTINUED>                              0
<EXTRAORDINARY>                             0
<CHANGES>                                   0
<NET-INCOME>                                9,575
<EPS-BASIC>                                 0.97
<EPS-DILUTED>                               0.97