INTANGIBLE ASSETS
3 Months Ended
Mar. 31, 2013
INTANGIBLE ASSETS [Text Block]

NOTE 7 – INTANGIBLE ASSETS

Intangible assets, at cost, are summarized by project location as follows:

    March 31,     December 31,  
    2013     2012  
In operation:            
     San Emidio, Nevada:            
             Geothermal water and mineral rights $ 4,825,220   $ 4,825,220  
             Less: accumulated amortization   (827,467 )   (765,147 )
    3,997,753     4,060,073  
             
Inactive:            
     Raft River, Idaho:            
             Surface water rights   146,342     146,342  
             Geothermal water and mineral rights   1,251,540     1,251,540  
             
     Granite Creek, Nevada:            
             Surface water rights   451,299     451,299  
             
     Neal Hot Springs, Oregon:            
             Geothermal water and mineral rights   625,337     625,337  
             
     Guatemala City, Guatemala:            
             Geothermal water and mineral rights   625,000     625,000  
             
     Gerlach, Nevada:            
             Geothermal water and mineral rights   997,000     997,000  
             
     San Emidio, Nevada:            
             Surface water rights   4,323,520     4,323,520  
             Geothermal water and mineral rights   3,440,580     3,440,580  
             Less: prior accumulated amortization   (430,073 )   (430,073 )
    11,430,545     11,430,545  
             
  $ 15,428,298   $ 15,490,618  

Amortization expense charged to plant operations during the three months ended March 31, 2013 and 2012 was $62,320 and $49,768 ; respectively.

Estimated aggregate amortization expense for the next five years is as follows:

    Projected  
    Amounts  
Years ending December 31,      
                    20 13 $ 120,630  
                    2014   160,840  
                    2015   160,840  
                    2016   160,840  
                    2017   160,840  
       
  $ 763,990