<ARTICLE> 5
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   3-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1998
<PERIOD-START>                             JUL-01-1998             JAN-01-1998
<PERIOD-END>                               SEP-30-1998             SEP-30-1998
<CASH>                                           6,658                   6,658
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   16,375                  16,375
<ALLOWANCES>                                         0                       0
<INVENTORY>                                      8,035                   8,035
<CURRENT-ASSETS>                                35,479                  35,479
<PP&E>                                         275,464                 275,464
<DEPRECIATION>                                 (61,684)                (61,684)
<TOTAL-ASSETS>                                 251,737                 251,737
<CURRENT-LIABILITIES>                           18,491                  18,491 
<BONDS>                                         60,491                  60,491 
<PREFERRED-MANDATORY>                                0                       0 
<PREFERRED>                                          0                       0 
<COMMON>                                           207                     207 
<OTHER-SE>                                     152,326                 152,326 
<TOTAL-LIABILITY-AND-EQUITY>                   251,737                 251,737 
<SALES>                                         28,198                  76,234
<TOTAL-REVENUES>                                28,198                  76,234
<CGS>                                           17,178                  49,698
<TOTAL-COSTS>                                   21,541                  61,608
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                 645                   2,550
<INCOME-PRETAX>                                  6,161                  12,738
<INCOME-TAX>                                    (2,371)                 (4,904)
<INCOME-CONTINUING>                              3,790                   7,834
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     3,790                   7,834
<EPS-PRIMARY>                                     0.18                    0.38
<EPS-DILUTED>                                     0.18                    0.38