<ARTICLE>                      5
<LEGEND>
                    THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
                    EXTRACTED FROM THE COMPANY'S AUDITED FINANCIAL
                    STATEMENTS AS OF AND FOR THE PERIOD ENDING DECEMBER 31,
                    1998, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
                    SUCH FINANCIAL STATEMENTS
</LEGEND>
<MULTIPLIER>                   1,000
<PERIOD-START>                 JAN-01-1998
<PERIOD-TYPE>                  12-MOS
<FISCAL-YEAR-END>              DEC-31-1998
<PERIOD-END>                   DEC-31-1998
<CASH>                                                 6,145
<SECURITIES>                                               0
<RECEIVABLES>                                         72,785
<ALLOWANCES>                                               0
<INVENTORY>                                           22,866
<CURRENT-ASSETS>                                     114,539
<PP&E>                                               328,609
<DEPRECIATION>                                       158,724
<TOTAL-ASSETS>                                       340,554
<CURRENT-LIABILITIES>                                 82,343
<BONDS>                                                    0
<COMMON>                                              18,177
<PREFERRED-MANDATORY>                                      0
<PREFERRED>                                                0
<OTHER-SE>                                           106,391
<TOTAL-LIABILITY-AND-EQUITY>                         340,554
<SALES>                                              496,419
<TOTAL-REVENUES>                                     496,715
<CGS>                                                446,914
<TOTAL-COSTS>                                        462,273
<OTHER-EXPENSES>                                       2,500
<LOSS-PROVISION>                                           0
<INTEREST-EXPENSE>                                     9,588
<INCOME-PRETAX>                                       22,354
<INCOME-TAX>                                           7,599
<INCOME-CONTINUING>                                   14,755
<DISCONTINUED>                                             0
<EXTRAORDINARY>                                            0
<CHANGES>                                                  0
<NET-INCOME>                                          14,755
<EPS-PRIMARY>                                           0.81
<EPS-DILUTED>                                           0.80