<ARTICLE>         5
<LEGEND>          THIS SCHEDULE CONTAINS SUMMARY FINANCIAL
                  INFORMATION EXTRACTED FROM THE 
                  COMPANY'S UNAUDITED FINANCIAL STATEMENTS
                  AS OF AND FOR THE PERIOD ENDING MARCH 31,
                  1998, AND IS QUALIFIED IN ITS ENTIRETY BY 
                  REFERENCE TO SUCH FINANCIAL STATEMENTS 
<MULTIPLIER>      1,000
               
                         
<FISCAL-YEAR-END>           DEC-31-1998
<PERIOD-END>                MAR-31-1998
<PERIOD-TYPE>                     3-MOS

<CASH>                           15,606
<SECURITIES>                          0
<RECEIVABLES>                    80,300
<ALLOWANCES>                          0
<INVENTORY>                      17,927
<CURRENT-ASSETS>                129,311
<PP&E>                          316,523
<DEPRECIATION>                  143,771
<TOTAL-ASSETS>                  353,961
<CURRENT-LIABILITIES>            86,443
<BONDS>                         118,468
<PREFERRED-MANDATORY>                 0
<PREFERRED>                           0
<COMMON>                         18,236
<OTHER-SE>                      102,844
<TOTAL-LIABILITY-AND-EQUITY>    353,961
<SALES>                         125,556
<TOTAL-REVENUES>                125,556
<CGS>                           111,933
<TOTAL-COSTS>                   115,436
<OTHER-EXPENSES>                      0
<LOSS-PROVISION>                      0
<INTEREST-EXPENSE>                2,443 
<INCOME-PRETAX>                   7,604
<INCOME-TAX>                      2,699
<INCOME-CONTINUING>               4,905
<DISCONTINUED>                        0
<EXTRAORDINARY>                       0
<CHANGES>                             0
<NET-INCOME>                      4,905
<EPS-PRIMARY>                      0.27
<EPS-DILUTED>                      0.27