<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, 1999, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               DEC-31-1999
<CASH>                                           7,362
<SECURITIES>                                         0
<RECEIVABLES>                                   84,124
<ALLOWANCES>                                         0
<INVENTORY>                                     19,448
<CURRENT-ASSETS>                               129,298
<PP&E>                                         362,259
<DEPRECIATION>                                 179,346
<TOTAL-ASSETS>                                 361,456
<CURRENT-LIABILITIES>                          106,313
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        17,930
<OTHER-SE>                                     115,102
<TOTAL-LIABILITY-AND-EQUITY>                   361,456
<SALES>                                        532,676
<TOTAL-REVENUES>                               534,685
<CGS>                                          478,903
<TOTAL-COSTS>                                  493,688
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               9,279
<INCOME-PRETAX>                                 31,718
<INCOME-TAX>                                    10,880
<INCOME-CONTINUING>                             20,838
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    20,838
<EPS-BASIC>                                       1.15
<EPS-DILUTED>                                     1.15