<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                           7,379
<SECURITIES>                                         0
<RECEIVABLES>                                   85,319
<ALLOWANCES>                                     1,420
<INVENTORY>                                     74,902
<CURRENT-ASSETS>                               175,632
<PP&E>                                         667,918
<DEPRECIATION>                                 291,113
<TOTAL-ASSETS>                                 587,814
<CURRENT-LIABILITIES>                           99,769
<BONDS>                                         90,104
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         4,416
<OTHER-SE>                                     323,187
<TOTAL-LIABILITY-AND-EQUITY>                   587,814
<SALES>                                        695,021
<TOTAL-REVENUES>                               699,630
<CGS>                                          611,168
<TOTAL-COSTS>                                  611,168
<OTHER-EXPENSES>                                34,643
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               4,634
<INCOME-PRETAX>                                 38,040
<INCOME-TAX>                                    14,292
<INCOME-CONTINUING>                             23,748
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    23,748
<EPS-PRIMARY>                                     0.90<F1>
<EPS-DILUTED>                                     0.88<F1>
<FN>
<F1>Earnings per share have been restated to comply with SFAS No. 128.
</FN>