<ARTICLE> 5 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> MAR-31-1997 <CASH> 1,239,787 <SECURITIES> 0 <RECEIVABLES> 2,736,281 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 4,179,906 <PP&E> 100,843,915 <DEPRECIATION> 53,177,533 <TOTAL-ASSETS> 52,251,457 <CURRENT-LIABILITIES> 1,682,954 <BONDS> 2,081,167 <COMMON> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 48,209,336 <TOTAL-LIABILITY-AND-EQUITY> 52,251,457 <SALES> 4,708,989 <TOTAL-REVENUES> 4,859,944 <CGS> 531,231 <TOTAL-COSTS> 2,743,200 <OTHER-EXPENSES> 61,001 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 71,101 <INCOME-PRETAX> 2,055,743 <INCOME-TAX> 0 <INCOME-CONTINUING> 0 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 2,055,743 <EPS-PRIMARY> .32 <EPS-DILUTED> 0