<ARTICLE>                     5
<LEGEND>
    This  schedule  contains  summary  financial   information   extracted  from
    Consolidated  Summary  Financial  Statements and Notes included in this Form
    10-Q  and is  qualified  in its  entirety  by  reference  to such  financial
    statements.
</LEGEND>

<MULTIPLIER>                         1,000
       
                                          
<PERIOD-TYPE>                        9-MOS
<FISCAL-YEAR-END>                    DEC-31-1998
<PERIOD-END>                         SEP-30-1998
<PERIOD-START>                       JAN-01-1998
<CASH>                                 52,800
<SECURITIES>                          169,900
<RECEIVABLES>                         165,200
<ALLOWANCES>                                0
<INVENTORY>                           221,300
<CURRENT-ASSETS>                      759,800
<PP&E>                              2,124,900
<DEPRECIATION>                     (1,190,900)
<TOTAL-ASSETS>                      2,706,700
<CURRENT-LIABILITIES>                 496,700
<BONDS>                               475,300
<PREFERRED-MANDATORY>                       0
<PREFERRED>                                 0
<COMMON>                              117,000
<OTHER-SE>                          1,136,200
<TOTAL-LIABILITY-AND-EQUITY>        2,706,700
<SALES>                             1,777,800
<TOTAL-REVENUES>                    1,777,800
<CGS>                               1,430,600
<TOTAL-COSTS>                       1,770,100
<OTHER-EXPENSES>                            0
<LOSS-PROVISION>                            0
<INTEREST-EXPENSE>                     15,300
<INCOME-PRETAX>                        (7,600)
<INCOME-TAX>                            9,300
<INCOME-CONTINUING>                   (13,900)
<DISCONTINUED>                              0
<EXTRAORDINARY>                             0
<CHANGES>                                   0
<NET-INCOME>                          (13,900)
<EPS-PRIMARY>                            (.13)
<EPS-DILUTED>                            (.13)