<ARTICLE>                            5
<LEGEND>
                  THIS SCHEDULE CONTAINS SUMMARY FINANCIAL
                  INFORMATION EXTRACTED FROM THE COMPANY'S UNAUDITED
                  FINANCIAL STATEMENTS AS OF AND FOR THE PERIOD
                  ENDING SEPTEMBER 30, 1999 AND IS QUALIFIED IN ITS
                  ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS
</LEGEND>
<MULTIPLIER>                     1,000
<FISCAL-YEAR-END>          DEC-31-1999
<PERIOD-END>               SEP-30-1999
<PERIOD-TYPE>              9-MOS

<CASH>                                         5,717
<SECURITIES>                                       0
<RECEIVABLES>                                 81,978
<ALLOWANCES>                                       0
<INVENTORY>                                   17,617
<CURRENT-ASSETS>                             122,941
<PP&E>                                       352,785
<DEPRECIATION>                               175,105
<TOTAL-ASSETS>                               352,060
<CURRENT-LIABILITIES>                         87,101
<BONDS>                                            0
<COMMON>                                      18,037
<PREFERRED-MANDATORY>                              0
<PREFERRED>                                        0
<OTHER-SE>                                   112,371
<TOTAL-LIABILITY-AND-EQUITY>                 352,060
<SALES>                                      396,721
<TOTAL-REVENUES>                             396,789
<CGS>                                        356,382
<TOTAL-COSTS>                                 10,258
<OTHER-EXPENSES>                                   0
<LOSS-PROVISION>                                   0
<INTEREST-EXPENSE>                             6,494
<INCOME-PRETAX>                               23,655
<INCOME-TAX>                                   8,113
<INCOME-CONTINUING>                           15,542
<DISCONTINUED>                                     0
<EXTRAORDINARY>                                    0
<CHANGES>                                          0
<NET-INCOME>                                  15,542
<EPS-BASIC>                                   0.86
<EPS-DILUTED>                                   0.86