<ARTICLE>                5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED STATEMENT OF INCOME FOR THE SIX MONTHS ENDED JUNE 30, 1997 AND
THE CONSOLIDATED BALANCE SHEET AT JUNE 30, 1997 AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>                        1,000
       
                                 
<PERIOD-TYPE>                         3-MOS
<FISCAL-YEAR-END>                     DEC-31-1997
<PERIOD-END>                          JUN-30-1997
<CASH>                                     39,850
<SECURITIES>                                    0
<RECEIVABLES>                             583,005
<ALLOWANCES>                               18,335
<INVENTORY>                               492,691
<CURRENT-ASSETS>                        1,150,871
<PP&E>                                  7,034,244
<DEPRECIATION>                          3,279,511
<TOTAL-ASSETS>                          5,123,752
<CURRENT-LIABILITIES>                     830,938
<BONDS>                                 1,252,223
<COMMON>                                   69,345
<PREFERRED-MANDATORY>                           0
<PREFERRED>                                     0
<OTHER-SE>                              1,981,382
<TOTAL-LIABILITY-AND-EQUITY>            5,123,752
<SALES>                                 2,162,716
<TOTAL-REVENUES>                        2,162,716
<CGS>                                   1,656,673
<TOTAL-COSTS>                           2,064,083
<OTHER-EXPENSES>                           (1,535)
<LOSS-PROVISION>                                0
<INTEREST-EXPENSE>                         59,023
<INCOME-PRETAX>                            41,145
<INCOME-TAX>                               15,223
<INCOME-CONTINUING>                        20,229 <F1>
<DISCONTINUED>                                  0
<EXTRAORDINARY>                                 0
<CHANGES>                                       0
<NET-INCOME>                               20,229
<EPS-PRIMARY>                                0.29
<EPS-DILUTED>                                0.29
<FN>
<F1>REFLECTS ADJUSTMENT FOR MINORITY INTEREST (NET OF TAX) OF $5,693
</FN>