<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS 6-MOS <FISCAL-YEAR-END> DEC-31-1999 DEC-31-1999 <PERIOD-START> APR-01-1999 JAN-01-1999 <PERIOD-END> JUN-30-1999 JUN-30-1999 <CASH> 3,125 3,125 <SECURITIES> 0 0 <RECEIVABLES> 23,816 23,816 <ALLOWANCES> 0 0 <INVENTORY> 9,621 9,621 <CURRENT-ASSETS> 42,025 42,025 <PP&E> 400,871 400,871 <DEPRECIATION> (70,216) (70,216) <TOTAL-ASSETS> 377,190 377,190 <CURRENT-LIABILITIES> 28,680 28,680 <BONDS> 18,558 18,558 <PREFERRED-MANDATORY> 0 0 <PREFERRED> 0 0 <COMMON> 377 377 <OTHER-SE> 299,663 299,663 <TOTAL-LIABILITY-AND-EQUITY> 377,190 377,190 <SALES> 36,845 74,875 <TOTAL-REVENUES> 36,845 74,875 <CGS> 21,168 39,399 <TOTAL-COSTS> 25,716 48,202 <OTHER-EXPENSES> 0 0 <LOSS-PROVISION> 0 0 <INTEREST-EXPENSE> 28 137 <INCOME-PRETAX> 11,281 27,203 <INCOME-TAX> (3,235) (8,569) <INCOME-CONTINUING> 8,046 18,634 <DISCONTINUED> 0 0 <EXTRAORDINARY> 0 0 <CHANGES> 0 0 <NET-INCOME> 8,046 18,634 <EPS-BASIC> 0.22 0.52 <EPS-DILUTED> 0.21 0.48