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

  

<ARTICLE> 5
<LEGEND>
This schedule contains financial information extracted from SEC filing Form 10-K
and is qualified in its entirety by reference to such financial statements.
</LEGEND>
       
                                           
<PERIOD-TYPE>                                 9-MOS
<FISCAL-YEAR-END>                             12/31/95
<PERIOD-END>                                  09/30/96
<CASH>                                           4,176
<SECURITIES>                                         0
<RECEIVABLES>                                   71,495
<ALLOWANCES>                                     2,912
<INVENTORY>                                      7,779
<CURRENT-ASSETS>                                93,536
<PP&E>                                         571,395
<DEPRECIATION>                                 224,935
<TOTAL-ASSETS>                                 869,736
<CURRENT-LIABILITIES>                           84,919
<BONDS>                                              0
<PREFERRED-MANDATORY>                              000
<PREFERRED>                                        000
<COMMON>                                           301
<OTHER-SE>                                     486,567
<TOTAL-LIABILITY-AND-EQUITY>                   869,736
<SALES>                                        458,765
<TOTAL-REVENUES>                               458,765
<CGS>                                                0
<TOTAL-COSTS>                                  403,834
<OTHER-EXPENSES>                               (3,166)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              10,259
<INCOME-PRETAX>                                 47,838
<INCOME-TAX>                                    20,805
<INCOME-CONTINUING>                             27,033
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    27,033
<EPS-PRIMARY>                                      .90
<EPS-DILUTED>                                      .90