<ARTICLE> 5
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1994
<PERIOD-START>                             JAN-01-1994
<PERIOD-END>                               SEP-30-1994
<CASH>                                         992,817
<SECURITIES>                                 1,976,477
<RECEIVABLES>                                2,831,914
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                             5,001,208
<PP&E>                                     205,379,681
<DEPRECIATION>                              36,172,144
<TOTAL-ASSETS>                             178,615,715
<CURRENT-LIABILITIES>                        3,632,973
<BONDS>                                              0
<COMMON>                                             0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                 155,512,333
<TOTAL-LIABILITY-AND-EQUITY>               178,615,715
<SALES>                                     33,830,442
<TOTAL-REVENUES>                            33,830,442
<CGS>                                       13,331,199
<TOTAL-COSTS>                               13,331,199
<OTHER-EXPENSES>                             2,700,236
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             319,315
<INCOME-PRETAX>                             17,479,692
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                         17,479,692
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                17,479,692
<EPS-PRIMARY>                                      .62
<EPS-DILUTED>                                      .62