<ARTICLE>     5
<LEGEND>     THIS SCHEDULE CONTAINS SUMMARY FINANCIAL
             INFORMATION EXTRACTED FROM THE 
             COMPANY'S UNAUDITED FINANCIAL STATEMENTS
             AS OF AND FOR THE PERIOD ENDING DECEMBER
             31, 1996, AND IS QUALIFIED IN ITS ENTIRETY BY 
             REFERENCE TO SUCH FINANCIAL STATEMENTS 
<MULTIPLIER>       1,000
<PERIOD-START>     JAN-01-1996
<PERIOD-TYPE>      12-MOS
<FISCAL-YEAR-END>  DEC-31-1996
<PERIOD-END>       DEC-31-1996


<CASH>                            28,902
<SECURITIES>                           0
<RECEIVABLES>                     41,032
<ALLOWANCES>                           0
<INVENTORY>                       14,034
<CURRENT-ASSETS>                  94,226
<PP&E>                           278,229
<DEPRECIATION>                   126,152
<TOTAL-ASSETS>                   248,956
<CURRENT-LIABILITIES>             49,188
<BONDS>                                0
<COMMON>                          18,080
<PREFERRED-MANDATORY>                  0
<PREFERRED>                            0
<OTHER-SE>                        97,912
<TOTAL-LIABILITY-AND-EQUITY>     248,956
<SALES>                          407,999
<TOTAL-REVENUES>                 409,424
<CGS>                            365,253
<TOTAL-COSTS>                     13,173
<OTHER-EXPENSES>                       0
<LOSS-PROVISION>                       0
<INTEREST-EXPENSE>                 5,354
<INCOME-PRETAX>                   25,644
<INCOME-TAX>                       8,037
<INCOME-CONTINUING>               17,607
<DISCONTINUED>                         0
<EXTRAORDINARY>                        0
<CHANGES>                              0
<NET-INCOME>                      17,607
<EPS-PRIMARY>                       0.97
<EPS-DILUTED>                       0.97