<ARTICLE>                5
<LEGEND>
This schedule  contains summary financial  information  extracted from form 10-Q
and is qualified in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER>                  1,000

                           
<PERIOD-TYPE>                 6-MOS
<FISCAL-YEAR-END>             DEC-31-1999
<PERIOD-END>                  JUN-30-1999
<CASH>                        17,040
<SECURITIES>                  0
<RECEIVABLES>                 213,637
<ALLOWANCES>                  0
<INVENTORY>                   80,344
<CURRENT-ASSETS>              333,322
<PP&E>                        2,682,084
<DEPRECIATION>                795,835
<TOTAL-ASSETS>                2,792,164
<CURRENT-LIABILITIES>         317,923
<BONDS>                       0
<PREFERRED-MANDATORY>         0
<PREFERRED>                   0
<COMMON>                      397
<OTHER-SE>                    600,068
<TOTAL-LIABILITY-AND-EQUITY>  2,792,164
<SALES>                       785,682
<TOTAL-REVENUES>              812,418
<CGS>                         727,457
<TOTAL-COSTS>                 777,695
<OTHER-EXPENSES>              0
<LOSS-PROVISION>              0
<INTEREST-EXPENSE>            46,706
<INCOME-PRETAX>               (11,321)
<INCOME-TAX>                  11,400
<INCOME-CONTINUING>           79
<DISCONTINUED>                0
<EXTRAORDINARY>               0
<CHANGES>                     3,813
<NET-INCOME>                  3,892
<EPS-BASIC>                 .10
<EPS-DILUTED>                 .10