<ARTICLE> 5 <RESTATED> <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-END> MAR-31-1997 <CASH> 31,363 <SECURITIES> 0 <RECEIVABLES> 85,979 <ALLOWANCES> 1,499 <INVENTORY> 77,577 <CURRENT-ASSETS> 201,749 <PP&E> 589,182 <DEPRECIATION> 268,471 <TOTAL-ASSETS> 551,971 <CURRENT-LIABILITIES> 97,033 <BONDS> 79,063 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 4,406 <OTHER-SE> 306,008 <TOTAL-LIABILITY-AND-EQUITY> 551,971 <SALES> 233,253 <TOTAL-REVENUES> 234,852 <CGS> 208,215 <TOTAL-COSTS> 208,215 <OTHER-EXPENSES> 11,747 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 1,570 <INCOME-PRETAX> 9,575 <INCOME-TAX> 3,444 <INCOME-CONTINUING> 6,131 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 6,131 <EPS-PRIMARY> 0.23<F1> <EPS-DILUTED> 0.23<F1> <FN> <F1>Earnings per share have been restated to comply with SFAS No. 128 </FN>