<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> YEAR <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> DEC-31-1997 <CASH> 7,528 <SECURITIES> 0 <RECEIVABLES> 94,459 <ALLOWANCES> 0 <INVENTORY> 43,001 <CURRENT-ASSETS> 149,368 <PP&E> 723,052 <DEPRECIATION> 432,852 <TOTAL-ASSETS> 500,186 <CURRENT-LIABILITIES> 85,034 <BONDS> 200,000 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 183,078 <TOTAL-LIABILITY-AND-EQUITY> 500,186 <SALES> 737,129 <TOTAL-REVENUES> 737,129 <CGS> 681,984 <TOTAL-COSTS> 681,984 <OTHER-EXPENSES> 28,650 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 20,898 <INCOME-PRETAX> 5,597 <INCOME-TAX> 0 <INCOME-CONTINUING> 5,597 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 5,597 <EPS-PRIMARY> 0.15 <EPS-DILUTED> 0.15