<ARTICLE> 5 <MULTIPLIER> 1 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <CASH> 1,022,153 <SECURITIES> 0 <RECEIVABLES> 639,264 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 1,481,417 <PP&E> 24,860,643 <DEPRECIATION> (12,058,519) <TOTAL-ASSETS> 14,303,329 <CURRENT-LIABILITIES> 919,054 <BONDS> 0 <COMMON> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 13,384,275 <TOTAL-LIABILITY-AND-EQUITY> 14,303,329 <SALES> 0 <TOTAL-REVENUES> 1,390,478 <CGS> 0 <TOTAL-COSTS> 0 <OTHER-EXPENSES> 1,766,000 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> (375,522) <INCOME-TAX> 0 <INCOME-CONTINUING> (375,522) <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> (375,522) <EPS-PRIMARY> 0 <EPS-DILUTED> 0