<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
consolidated financial statements and is qualified in its entirety by reference
to such consolidated financial statements.
</LEGEND>
<MULTIPLIER> 1000
       
                                               
<PERIOD-TYPE>                 YEAR                   3-MOS
<FISCAL-YEAR-END>             DEC-31-1997            DEC-31-1998
<PERIOD-START>                JAN-01-1997            JAN-01-1998
<PERIOD-END>                  DEC-31-1997            MAR-31-1998
<CASH>                             17,285                  3,346
<SECURITIES>                            0                      0
<RECEIVABLES>                     169,706                118,428
<ALLOWANCES>                        3,247                  3,247
<INVENTORY>                        96,636                 97,207
<CURRENT-ASSETS>                  289,172                228,025
<PP&E>                            768,883                835,184
<DEPRECIATION>                    119,103                132,511
<TOTAL-ASSETS>                  1,017,653                999,541
<CURRENT-LIABILITIES>             385,998                369,044
<BONDS>                           507,043                482,962
<PREFERRED-MANDATORY>                   0                      0
<PREFERRED>                             0                      0
<COMMON>                                1                      1
<OTHER-SE>                         37,230                 54,456
<TOTAL-LIABILITY-AND-EQUITY>    1,017,653                999,541
<SALES>                         2,147,451                583,285
<TOTAL-REVENUES>                2,147,451                583,285
<CGS>                           1,927,364                522,279
<TOTAL-COSTS>                   1,927,364                522,279
<OTHER-EXPENSES>                  103,954                 24,699
<LOSS-PROVISION>                    1,000                      0
<INTEREST-EXPENSE>                  8,956                  9,981
<INCOME-PRETAX>                    94,197                 26,891
<INCOME-TAX>                       38,933                  9,968
<INCOME-CONTINUING>                55,264                 16,923        
<DISCONTINUED>                          0                      0
<EXTRAORDINARY>                         0                      0 
<CHANGES>                               0                      0
<NET-INCOME>                       55,264                 16,923
<EPS-PRIMARY>                       2,917                  2,061
<EPS-DILUTED>                       1,723                  1,651