<ARTICLE>                5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED STATEMENT OF INCOME FOR THE SIX MONTHS ENDED JUNE 30, 1996
AND THE CONSOLIDATED BALANCE SHEET AT JUNE 30, 1996 AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>            1,000
       
                     
<PERIOD-TYPE>              6-MOS
<FISCAL-YEAR-END>                   DEC-31-1996
<PERIOD-END>                        JUN-30-1996
<CASH>                                   45,075
<SECURITIES>                                  0
<RECEIVABLES>                           502,253
<ALLOWANCES>                             17,308
<INVENTORY>                             439,362
<CURRENT-ASSETS>                      1,018,201
<PP&E>                                6,765,937
<DEPRECIATION>                        3,044,331
<TOTAL-ASSETS>                        4,916,194
<CURRENT-LIABILITIES>                   647,040
<BONDS>                               1,189,957
<COMMON>                                 68,589
<PREFERRED-MANDATORY>                         0
<PREFERRED>                                   0
<OTHER-SE>                            2,037,225
<TOTAL-LIABILITY-AND-EQUITY>          4,916,194
<SALES>                               1,912,303
<TOTAL-REVENUES>                      1,912,303
<CGS>                                 1,388,290
<TOTAL-COSTS>                         1,729,181
<OTHER-EXPENSES>                         (3,655)
<LOSS-PROVISION>                              0
<INTEREST-EXPENSE>                       55,271
<INCOME-PRETAX>                         131,506
<INCOME-TAX>                             49,183
<INCOME-CONTINUING>                      76,642<F1>
<DISCONTINUED>                                0
<EXTRAORDINARY>                               0
<CHANGES>                                     0
<NET-INCOME>                             76,642
<EPS-PRIMARY>                              1.11
<EPS-DILUTED>                              1.10
<FN>
<F1>   REFLECTS ADJUSTMENT FOR MINORITY INTEREST (NET OF TAX) OF $5,681
</FN>