<ARTICLE> 5
       
                                                  
<PERIOD-TYPE>                   6-MOS                   6-MOS
<FISCAL-YEAR-END>                          NOV-30-1998             NOV-30-1997
<PERIOD-END>                               MAY-31-1998             MAY-31-1997
<CASH>                                           6,078                  13,901
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<ALLOWANCES>                                         0                       0
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<PP&E>                                         161,288                 125,853
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<CURRENT-LIABILITIES>                          101,907                  90,490
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<COMMON>                                        12,969                  12,941
<OTHER-SE>                                           0                       0
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<SALES>                                        239,500                 239,786
<TOTAL-REVENUES>                               239,500                 239,786
<CGS>                                          178,972                 176,895
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<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                               6,058                   5,709
<INCOME-PRETAX>                                  5,461                   9,550
<INCOME-TAX>                                     1,911                   3,342
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<NET-INCOME>                                     3,550                   6,208
<EPS-PRIMARY>                                     0.89                    1.55
<EPS-DILUTED>                                     0.86                    1.53