<ARTICLE> 5
<LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM 
CONDENSED CONSOLIDATED BALANCE SHEET AS OF MARCH 31, 1997 AND CONSOLIDATED 
STATEMENT OF INCOME FOR THE THREE MONTHS THEN ENDED AND IS QUALIFIED IN ITS 
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. 
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                         DEC-31-1997
<PERIOD-END>                              MAR-31-1997
<CASH>                                          3,033 
<SECURITIES>                                        0 
<RECEIVABLES>                                  84,194 
<ALLOWANCES>                                        0 
<INVENTORY>                                    45,040 
<CURRENT-ASSETS>                              145,878       
<PP&E>                                        504,477      
<DEPRECIATION>                                297,768    
<TOTAL-ASSETS>                                372,138      
<CURRENT-LIABILITIES>                          77,792    
<BONDS>                                        97,848  
<PREFERRED-MANDATORY>                               0 
<PREFERRED>                                    19,924 
<COMMON>                                       10,137 
<OTHER-SE>                                    102,922       
<TOTAL-LIABILITY-AND-EQUITY>                  372,138         
<SALES>                                       139,670          
<TOTAL-REVENUES>                              139,670          
<CGS>                                         115,625          
<TOTAL-COSTS>                                 130,165          
<OTHER-EXPENSES>                                   96       
<LOSS-PROVISION>                                    0      
<INTEREST-EXPENSE>                              1,870       
<INCOME-PRETAX>                                 7,539       
<INCOME-TAX>                                    3,062      
<INCOME-CONTINUING>                             4,477      
<DISCONTINUED>                                      0  
<EXTRAORDINARY>                                     0      
<CHANGES>                                           0  
<NET-INCOME>                                    4,477 
<EPS-PRIMARY>                                    0.43 
<EPS-DILUTED>                                    0.41