<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <CASH> 973,537 <SECURITIES> 313,146 <RECEIVABLES> 1,058,442 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 2,345,125 <PP&E> 22,376,454 <DEPRECIATION> 12,767,240 <TOTAL-ASSETS> 11,954,339 <CURRENT-LIABILITIES> 346,276 <BONDS> 4,885,878 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 6,722,185 <TOTAL-LIABILITY-AND-EQUITY> 11,954,339 <SALES> 0 <TOTAL-REVENUES> 1,952,010 <CGS> 0 <TOTAL-COSTS> 0 <OTHER-EXPENSES> 1,431,276 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 196,998 <INCOME-PRETAX> 323,736 <INCOME-TAX> 0 <INCOME-CONTINUING> 323,736 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 323,736 <EPS-PRIMARY> 0 <EPS-DILUTED> 0