<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONDENSED
CONSOLIDATED BALANCE SHEET AS OF MARCH 31, 2000 AND CONSOLIDATED STATEMENT OF
INCOME FOR THE THREE MONTHS THEN ENDED AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                           4,020
<SECURITIES>                                         0
<RECEIVABLES>                                   97,867
<ALLOWANCES>                                         0
<INVENTORY>                                     51,533
<CURRENT-ASSETS>                               167,763
<PP&E>                                         601,021
<DEPRECIATION>                                 396,128
<TOTAL-ASSETS>                                 410,384
<CURRENT-LIABILITIES>                           88,169
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                     19,443
<COMMON>                                         9,705
<OTHER-SE>                                     127,450
<TOTAL-LIABILITY-AND-EQUITY>                   410,384
<SALES>                                        167,376
<TOTAL-REVENUES>                               167,376
<CGS>                                          140,293
<TOTAL-COSTS>                                  158,376
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               2,051
<INCOME-PRETAX>                                  7,003
<INCOME-TAX>                                     2,732
<INCOME-CONTINUING>                              4,271
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     4,271
<EPS-BASIC>                                       0.43
<EPS-DILUTED>                                     0.41