<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> MAR-31-1998 <PERIOD-START> JUL-01-1997 <PERIOD-END> SEP-30-1997 <CASH> 38,460 <SECURITIES> 0 <RECEIVABLES> 52,505 <ALLOWANCES> 1,085 <INVENTORY> 14,318 <CURRENT-ASSETS> 111,610 <PP&E> 376,942 <DEPRECIATION> 68,661 <TOTAL-ASSETS> 427,877 <CURRENT-LIABILITIES> 39,483 <BONDS> 230,000 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 42 <OTHER-SE> 144,384 <TOTAL-LIABILITY-AND-EQUITY> 427,877 <SALES> 90,446 <TOTAL-REVENUES> 90,446 <CGS> 55,750 <TOTAL-COSTS> 55,750 <OTHER-EXPENSES> 5,573 <LOSS-PROVISION> 15 <INTEREST-EXPENSE> 1,888 <INCOME-PRETAX> 27,235 <INCOME-TAX> 8,171 <INCOME-CONTINUING> 19,064 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 19,064 <EPS-PRIMARY> 0.43 <EPS-DILUTED> 0.38