<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS RESTATED SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE REGISTRANT'S REPORT ON FORM 10-Q FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <RESTATED> <MULTIPLIER> 1,000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> SEP-30-1997 <CASH> 13,002 <SECURITIES> 0 <RECEIVABLES> 154,295 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 197,561 <PP&E> 1,163,258 <DEPRECIATION> 409,509 <TOTAL-ASSETS> 978,307 <CURRENT-LIABILITIES> 167,981 <BONDS> 0 <PREFERRED-MANDATORY> 390 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 0 <TOTAL-LIABILITY-AND-EQUITY> 978,307 <SALES> 1,139,059 <TOTAL-REVENUES> 1,139,059 <CGS> 0 <TOTAL-COSTS> 1,113,447 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 18,588 <INCOME-PRETAX> 7,024 <INCOME-TAX> 2,669 <INCOME-CONTINUING> 4,355 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 4,355 <EPS-PRIMARY> .12 <EPS-DILUTED> .12