<ARTICLE>5
       
                                    
<PERIOD-TYPE>                                 YEAR
<FISCAL-YEAR-END>                      DEC-31-1996
<PERIOD-END>                           DEC-31-1996
<CASH>                                    23252136
<SECURITIES>                                     0
<RECEIVABLES>                             13490098
<ALLOWANCES>                                     0
<INVENTORY>                                      0
<CURRENT-ASSETS>                                 0
<PP&E>                                   182665366
<DEPRECIATION>                           146813332
<TOTAL-ASSETS>                            72594268
<CURRENT-LIABILITIES>                            0
<BONDS>                                          0
<PREFERRED-MANDATORY>                            0
<PREFERRED>                                      0
<COMMON>                                         0
<OTHER-SE>                                70508416
<TOTAL-LIABILITY-AND-EQUITY>              72594268
<SALES>                                          0
<TOTAL-REVENUES>                          15068573
<CGS>                                            0
<TOTAL-COSTS>                                    0
<OTHER-EXPENSES>                          67900653
<LOSS-PROVISION>                                 0
<INTEREST-EXPENSE>                               0
<INCOME-PRETAX>                         (52832080)
<INCOME-TAX>                                     0
<INCOME-CONTINUING>                     (52832080)
<DISCONTINUED>                                   0
<EXTRAORDINARY>                                  0
<CHANGES>                                        0
<NET-INCOME>                            (52832080)
<EPS-PRIMARY>                             (106.61)
<EPS-DILUTED>                                    0