WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

  


In the following financial data schedule, Earnings Per Share - Basic are listed
in the Earnings Per Share - Primary field.  Due to Edgar filing rules and 
required tags, the EPS-Primary field could not be changed to read EPS-Basic.
See Notes A and M to the consolidated financial statements.

<ARTICLE>                               5
<LEGEND>                                THIS SCHEDULE CONTAINS SUMMARY
                                        FINANCIAL INFORMATION EXTRACTED
                                        FROM FINANCIAL STATEMENTS INCLUDED
                                        IN THE ANNUAL REPORT ON FORM 10-K
                                        FOR THE YEAR ENDED DECEMBER 31, 1997
                                        AND IS QUALIFIED IN ITS ENTIRETY BY 
                                        REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>                            1000
       
                                     
<PERIOD-TYPE>                           YEAR
<FISCAL-YEAR-END>                       DEC-31-1997
<PERIOD-END>                            DEC-31-1997
<CASH>                                           69,442
<SECURITIES>                                          0
<RECEIVABLES>                                   370,698
<ALLOWANCES>                                      9,985
<INVENTORY>                                      37,156
<CURRENT-ASSETS>                                684,734
<PP&E>                                        2,210,789
<DEPRECIATION>                                  704,294
<TOTAL-ASSETS>                                2,411,010
<CURRENT-LIABILITIES>                           745,700
<BONDS>                                         417,564
<PREFERRED-MANDATORY>                                 0
<PREFERRED>                                           0
<COMMON>                                        268,328
<OTHER-SE>                                      555,192
<TOTAL-LIABILITY-AND-EQUITY>                  2,411,010
<SALES>                                       2,151,015
<TOTAL-REVENUES>                              2,151,015
<CGS>                                         1,636,332
<TOTAL-COSTS>                                 2,038,577
<OTHER-EXPENSES>                                      0
<LOSS-PROVISION>                                 16,386
<INTEREST-EXPENSE>                               45,678
<INCOME-PRETAX>                                 124,202
<INCOME-TAX>                                     46,145
<INCOME-CONTINUING>                              78,057
<DISCONTINUED>                                        0
<EXTRAORDINARY>                                       0
<CHANGES>                                             0
<NET-INCOME>                                     78,057
<EPS-PRIMARY>                                         2.17
<EPS-DILUTED>                                         2.16