<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <CASH> 576,106 <SECURITIES> 0 <RECEIVABLES> 3,296,784 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 4,321,453 <PP&E> 109,066,076 <DEPRECIATION> 63,764,028 <TOTAL-ASSETS> 50,081,309 <CURRENT-LIABILITIES> 1,584,745 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 12,761,100 <OTHER-SE> 0 <TOTAL-LIABILITY-AND-EQUITY> 50,081,309 <SALES> 8,745,718 <TOTAL-REVENUES> 9,531,393 <CGS> 0 <TOTAL-COSTS> 7,759,789 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 324,172 <INCOME-PRETAX> 1,447,432 <INCOME-TAX> 505,847 <INCOME-CONTINUING> 941,585 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 941,585 <EPS-PRIMARY> .07 <EPS-DILUTED> .07