<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION FROM CONDENSED FINANCIAL
STATEMENTS FOR THE PERIOD ENDING APRIL 30, 1997 AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          APR-30-1997
<PERIOD-END>                               APR-30-1997
<CASH>                                           2,437
<SECURITIES>                                         0
<RECEIVABLES>                                   35,547
<ALLOWANCES>                                         0
<INVENTORY>                                     30,202
<CURRENT-ASSETS>                                71,958
<PP&E>                                         244,047
<DEPRECIATION>                                 122,220
<TOTAL-ASSETS>                                 196,631
<CURRENT-LIABILITIES>                           30,711
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           509
<OTHER-SE>                                      86,907
<TOTAL-LIABILITY-AND-EQUITY>                   196,631
<SALES>                                        211,663
<TOTAL-REVENUES>                               212,388
<CGS>                                          184,456
<TOTAL-COSTS>                                  197,234
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               4,297
<INCOME-PRETAX>                                 10,857
<INCOME-TAX>                                     4,387
<INCOME-CONTINUING>                              6,470
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     6,470
<EPS-PRIMARY>                                     1.27
<EPS-DILUTED>                                     1.27