<ARTICLE> 5 <MULTIPLIER> 1,000 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> JUL-04-1998 <EXCHANGE-RATE> 1 <CASH> 516 <SECURITIES> 0 <RECEIVABLES> 57,366 <ALLOWANCES> 314 <INVENTORY> 3,260 <CURRENT-ASSETS> 65,422 <PP&E> 207,652 <DEPRECIATION> 129,861 <TOTAL-ASSETS> 152,783 <CURRENT-LIABILITIES> 53,490 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 8,728 <OTHER-SE> 47,870 <TOTAL-LIABILITY-AND-EQUITY> 152,783 <SALES> 0 <TOTAL-REVENUES> 150,986 <CGS> 0 <TOTAL-COSTS> 144,584 <OTHER-EXPENSES> 227 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 1,393 <INCOME-PRETAX> 5,236 <INCOME-TAX> 2,168 <INCOME-CONTINUING> 3,068 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 3,068 <EPS-PRIMARY> .73 <EPS-DILUTED> .66