<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT MARCH 31, 1997, JUNE 30, 1997 AND SEPTEMBER 30, 1997 (UNAUDITED) AND
THE STATEMENT OF OPERATIONS FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1997,
JUNE 30, 1997 AND SEPTEMBER 30, 1997 (UNAUDITED) AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED AS PART OF ITS
QUARTERLY REPORT ON FORM 10-Q FOR THE PERIOD MARCH 31, 1997, JUNE 30, 1997 AND
SEPTEMBER 30, 1997.
</LEGEND>
<PERIOD-TYPE> 3-MOS 6-MOS 9-MOS
<FISCAL-YEAR-END> DEC-31-1997 DEC-31-1997 DEC-31-1997
<PERIOD-START> JAN-01-1997 JAN-01-1997 JAN-01-1997
<PERIOD-END> MAR-31-1997 JUN-30-1997 SEP-30-1997
<CASH> 1,109,967 1,215,001 1,267,674
<SECURITIES> 0 0 0
<RECEIVABLES> 1,160,480 1,052,809 1,162,767
<ALLOWANCES> 0 0 0
<INVENTORY> 0 0 0
<CURRENT-ASSETS> 2,270,447 2,267,810 2,430,441
<PP&E> 53,173,480 53,106,373 53,131,844
<DEPRECIATION> 11,331,881 12,091,152 12,843,837
<TOTAL-ASSETS> 44,478,657 43,580,270 42,946,315
<CURRENT-LIABILITIES> 0 0 0
<BONDS> 0 0 0
<PREFERRED-MANDATORY> 0 0 0
<PREFERRED> 0 0 0
<COMMON> 0 0 0
<OTHER-SE> 44,478,657 43,580,270 42,946,315
<TOTAL-LIABILITY-AND-EQUITY> 44,478,657 43,580,270 42,946,315
<SALES> 0 0 0
<TOTAL-REVENUES> 1,220,351 2,498,145 3,953,363
<CGS> 0 0 0
<TOTAL-COSTS> 866,839 1,741,075 2,600,417
<OTHER-EXPENSES> 0 0 0
<LOSS-PROVISION> 0 0 0
<INTEREST-EXPENSE> 0 0 0
<INCOME-PRETAX> 0 0 0
<INCOME-TAX> 0 0 0
<INCOME-CONTINUING> 0 0 0
<DISCONTINUED> 0 0 0
<EXTRAORDINARY> 0 0 0
<CHANGES> 0 0 0
<NET-INCOME> 407,871 844,654 1,467,252
<EPS-PRIMARY> 0 0 0
<EPS-DILUTED> 0 0 0