<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET AND CONSOLIDATED STATEMENTS OF INCOME FOUND ON PAGES
3 AND 4 OF THE COMPANY'S FORM 10-Q FOR THE YEAR-TO-DATE, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               SEP-30-1996
<CASH>                                           3,547
<SECURITIES>                                         0
<RECEIVABLES>                                   29,748
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                         575,131
<DEPRECIATION>                                 137,332
<TOTAL-ASSETS>                               1,012,797
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
<PREFERRED-MANDATORY>                           35,525
<PREFERRED>                                          0
<COMMON>                                       511,075
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                 1,012,797
<SALES>                                        249,437
<TOTAL-REVENUES>                               249,437
<CGS>                                          227,021
<TOTAL-COSTS>                                  236,875
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               1,852
<INCOME-PRETAX>                                 13,085
<INCOME-TAX>                                     5,168
<INCOME-CONTINUING>                              7,917
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     7,917
<EPS-PRIMARY>                                      .24
<EPS-DILUTED>                                      .24