<ARTICLE>5
<LEGEND>  THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
CONDENSED CONSOLIDATED BALANCE SHEET AS OF JUNE 30, 1996 AND CONSOLIDATED
STATEMENT OF INCOME FOR THE SIX MONTHS THEN ENDED AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>

       
                                          
<MULTIPLIER> 1,000
<PERIOD-TYPE>                            6-MOS
<FISCAL-YEAR-END>                                           DEC-31-1996
<PERIOD-END>                                                JUN-30-1996
<CASH>                                                            2,317
<SECURITIES>                                                          0
<RECEIVABLES>                                                    82,971
<ALLOWANCES>                                                          0
<INVENTORY>                                                      51,130
<CURRENT-ASSETS>                                                148,736
<PP&E>                                                          478,017
<DEPRECIATION>                                                  277,064
<TOTAL-ASSETS>                                                  370,916
<CURRENT-LIABILITIES>                                            88,043
<BONDS>                                                         104,869
<COMMON>                                                         10,106
<PREFERRED-MANDATORY>                                                 0
<PREFERRED>                                                      19,928
<OTHER-SE>                                                       99,641
<TOTAL-LIABILITY-AND-EQUITY>                                    370,916
<SALES>                                                         268,569
<TOTAL-REVENUES>                                                268,569
<CGS>                                                           217,846
<TOTAL-COSTS>                                                   246,985
<OTHER-EXPENSES>                                                      0
<LOSS-PROVISION>                                                      0
<INTEREST-EXPENSE>                                                3,719
<INCOME-PRETAX>                                                  17,865
<INCOME-TAX>                                                      7,057
<INCOME-CONTINUING>                                              10,808
<DISCONTINUED>                                                        0
<EXTRAORDINARY>                                                       0
<CHANGES>                                                             0
<NET-INCOME>                                                     10,808
<EPS-PRIMARY>                                                      1.03
<EPS-DILUTED>                                                      0.97