<ARTICLE> 5 <MULTIPLIER> 1,000 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> MAR-31-1998 <EXCHANGE-RATE> 1 <CASH> 3,752 <SECURITIES> 0 <RECEIVABLES> 22,025 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 26,054 <PP&E> 293,145 <DEPRECIATION> 126,293 <TOTAL-ASSETS> 214,093 <CURRENT-LIABILITIES> 25,049 <BONDS> 21,390 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 110 <OTHER-SE> 149,038 <TOTAL-LIABILITY-AND-EQUITY> 214,093 <SALES> 19,025 <TOTAL-REVENUES> 19,139 <CGS> 3,943 <TOTAL-COSTS> 3,943 <OTHER-EXPENSES> 35 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 394 <INCOME-PRETAX> 2,445 <INCOME-TAX> 775 <INCOME-CONTINUING> 1,670 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 1,670 <EPS-PRIMARY> 0.15 <EPS-DILUTED> 0.15