<ARTICLE> 5 <RESTATED> <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> MAR-31-1997 <CASH> 64,114 <SECURITIES> 0 <RECEIVABLES> 106,865 <ALLOWANCES> 1,190 <INVENTORY> 11,788 <CURRENT-ASSETS> 196,524 <PP&E> 1,558,080 <DEPRECIATION> 695,189 <TOTAL-ASSETS> 1,211,188 <CURRENT-LIABILITIES> 193,733 <BONDS> 434,164 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 922 <OTHER-SE> 519,331 <TOTAL-LIABILITY-AND-EQUITY> 1,211,188 <SALES> 127,957 <TOTAL-REVENUES> 128,655 <CGS> 0 <TOTAL-COSTS> 28,534 <OTHER-EXPENSES> 48,048 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 11,148 <INCOME-PRETAX> 36,021 <INCOME-TAX> 14,636 <INCOME-CONTINUING> 21,385 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 21,385 <EPS-PRIMARY> .23 <EPS-DILUTED> .22