<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1995 <PERIOD-START> JAN-01-1995 <PERIOD-END> JUN-30-1995 <CASH> 3,809 <SECURITIES> 0 <RECEIVABLES> 71,233 <ALLOWANCES> 0 <INVENTORY> 15,903 <CURRENT-ASSETS> 109,462 <PP&E> 628,322 <DEPRECIATION> 280,767 <TOTAL-ASSETS> 539,626 <CURRENT-LIABILITIES> 114,740 <BONDS> 66,820 <COMMON> 138 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 282,500 <TOTAL-LIABILITY-AND-EQUITY> 539,626 <SALES> 0 <TOTAL-REVENUES> 434,880 <CGS> 0 <TOTAL-COSTS> 324,199 <OTHER-EXPENSES> 40,606 <LOSS-PROVISION> 33,242 <INTEREST-EXPENSE> 3,041 <INCOME-PRETAX> 33,792 <INCOME-TAX> 12,396 <INCOME-CONTINUING> 21,396 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 21,396 <EPS-PRIMARY> 1.53 <EPS-DILUTED> 1.53