<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM MARCH 31, 1997 FORM 10-Q AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> MAR-31-1997 <CASH> 3,858 <SECURITIES> 0 <RECEIVABLES> 53,436 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 10,020 <PP&E> 1,025,523 <DEPRECIATION> 295,392 <TOTAL-ASSETS> 829,566 <CURRENT-LIABILITIES> 70,530 <BONDS> 357,156 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 129 <OTHER-SE> 333,960 <TOTAL-LIABILITY-AND-EQUITY> 829,566 <SALES> 99,115 <TOTAL-REVENUES> 99,234 <CGS> 38,690 <TOTAL-COSTS> 38,690 <OTHER-EXPENSES> 24,391 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 8,178 <INCOME-PRETAX> 27,975 <INCOME-TAX> 6,869 <INCOME-CONTINUING> 20,989 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 20,989 <EPS-PRIMARY> 0.82 <EPS-DILUTED> 0.82