<ARTICLE> 5 <PERIOD-TYPE> 12-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-END> DEC-31-1998 <CASH> 3,654,369 <SECURITIES> 0 <RECEIVABLES> 1,036,938 <ALLOWANCES> (530,164) <INVENTORY> 0 <CURRENT-ASSETS> 0 <PP&E> 52,579,704 <DEPRECIATION> (29,325,158) <TOTAL-ASSETS> 37,448,501 <CURRENT-LIABILITIES> 0 <BONDS> 7,094,110 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 27,954,970 <TOTAL-LIABILITY-AND-EQUITY> 37,448,501 <SALES> 9,872,315 <TOTAL-REVENUES> 10,201,001 <CGS> 4,849,621 <TOTAL-COSTS> 7,137,473 <OTHER-EXPENSES> 1,360,495 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 789,649 <INCOME-PRETAX> 913,384 <INCOME-TAX> 0 <INCOME-CONTINUING> 913,384 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 913,384 <EPS-PRIMARY> 0 <EPS-DILUTED> 0