<ARTICLE> 5
<LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM 
CONDENSED CONSOLIDATED BALANCE SHEET AS OF SEPTEMBER 30, 1997 AND CONSOLIDATED 
STATEMENT OF INCOME FOR THE NINE MONTHS THEN ENDED AND IS QUALIFIED IN ITS 
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. 
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                         DEC-31-1997
<PERIOD-START>                            JAN-01-1997
<PERIOD-END>                              SEP-30-1997
<CASH>                                          2,819 
<SECURITIES>                                        0 
<RECEIVABLES>                                  84,336 
<ALLOWANCES>                                        0 
<INVENTORY>                                    47,126 
<CURRENT-ASSETS>                              148,428       
<PP&E>                                        523,355
<DEPRECIATION>                                313,970    
<TOTAL-ASSETS>                                381,165      
<CURRENT-LIABILITIES>                          77,260    
<BONDS>                                       100,870  
<PREFERRED-MANDATORY>                               0 
<PREFERRED>                                    19,892 
<COMMON>                                       10,311 
<OTHER-SE>                                    107,309       
<TOTAL-LIABILITY-AND-EQUITY>                  381,165         
<SALES>                                       439,822          
<TOTAL-REVENUES>                              439,822          
<CGS>                                         360,188          
<TOTAL-COSTS>                                 404,037          
<OTHER-EXPENSES>                                    0       
<LOSS-PROVISION>                                    0      
<INTEREST-EXPENSE>                              5,625       
<INCOME-PRETAX>                                28,962       
<INCOME-TAX>                                   12,019      
<INCOME-CONTINUING>                            16,943      
<DISCONTINUED>                                      0  
<EXTRAORDINARY>                                     0      
<CHANGES>                                           0  
<NET-INCOME>                                   16,943 
<EPS-PRIMARY>                                    1.64 
<EPS-DILUTED>                                    1.53