<ARTICLE>           5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 10-K
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                           9,177
<SECURITIES>                                         0
<RECEIVABLES>                                  147,856
<ALLOWANCES>                                         0
<INVENTORY>                                     50,419
<CURRENT-ASSETS>                               243,178
<PP&E>                                       1,846,265
<DEPRECIATION>                                 696,339
<TOTAL-ASSETS>                               1,656,324
<CURRENT-LIABILITIES>                          202,274
<BONDS>                                              0
<COMMON>                                             0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                        397
<OTHER-SE>                                     611,101
<TOTAL-LIABILITY-AND-EQUITY>                 1,656,324
<SALES>                                      1,034,813
<TOTAL-REVENUES>                             1,066,873
<CGS>                                          918,862
<TOTAL-COSTS>                                1,024,991
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              17,101
<INCOME-PRETAX>                                 24,781
<INCOME-TAX>                                    (5,500)
<INCOME-CONTINUING>                             30,281
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    30,281
<EPS-PRIMARY>                                     1.00
<EPS-DILUTED>                                     1.00