<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT MARCH 31, 1996, JUNE 30, 1996 AND SEPTEMBER 30, 1996 (UNAUDITED) AND
THE STATEMENT OF OPERATIONS FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1996,
JUNE 30, 1996 AND SEPTEMBER 30, 1996 (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, 1996, JUNE 30, 1996 AND
SEPTEMBER 30, 1996.

</LEGEND>
       
                                                                       
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-START>                             JAN-01-1996             JAN-01-1996             JAN-01-1996
<PERIOD-END>                               MAR-31-1996             JUN-30-1996             SEP-30-1996
<CASH>                                       2,485,095               2,254,369               2,331,629
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                1,349,966               1,334,468               1,152,907
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                             3,835,061               3,588,837               3,484,536
<PP&E>                                      63,290,704              63,242,866              63,202,036
<DEPRECIATION>                              13,264,797              14,168,915              15,058,876
<TOTAL-ASSETS>                              54,187,433              52,928,968              51,883,592
<CURRENT-LIABILITIES>                        1,088,882                 883,585                 791,628
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                             0                       0                       0
<OTHER-SE>                                  53,098,551              52,045,383              51,041,964
<TOTAL-LIABILITY-AND-EQUITY>                54,187,433              52,928,968              51,833,592
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                             1,862,918               3,622,333               5,297,219
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                1,007,658               2,015,379               3,024,631
<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>                                   910,819               1,706,910               2,429,468
<EPS-PRIMARY>                                        0                       0                       0
<EPS-DILUTED>                                        0                       0                       0