<ARTICLE> 5 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-END> SEP-30-1999 <CASH> 5,773,000 <SECURITIES> 0 <RECEIVABLES> 1,603,000 <ALLOWANCES> (244,000) <INVENTORY> 0 <CURRENT-ASSETS> 7,284,000 <PP&E> 83,510,000 <DEPRECIATION> (61,490,000) <TOTAL-ASSETS> 31,427,000 <CURRENT-LIABILITIES> 7,080,000 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 5,073,000 <OTHER-SE> 19,092,000 <TOTAL-LIABILITY-AND-EQUITY> 31,427,000 <SALES> 6,840,000 <TOTAL-REVENUES> 7,017,000 <CGS> 0 <TOTAL-COSTS> 7,099,000 <OTHER-EXPENSES> 87,000 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 484,000 <INCOME-PRETAX> 689,000 <INCOME-TAX> 0 <INCOME-CONTINUING> 689,000 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 689,000 <EPS-BASIC> 0.180 <EPS-DILUTED> 0.180