Plains Petroleum Company and Subsidiaries - Page 27




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          production data from 1986.  During 1986, some of the wells valued           
          in the 1986 LAM reserve report experienced improved performance,            
          and some experienced deteriorated performance.                              
               The 1986 LAM updated reserve report, dated October 14, 1986,           
          estimated the discounted future net revenue from Tri-Power's                
          proved and producing reserves to be $19,114,541 as of November 1,           
          1986, using a 10-percent discount rate.  In a schedule to the               
          1986 LAM updated reserve report, LAM also presented a range of              
          present worth estimates using different discount rates.  LAM                
          estimated the present net worth of Tri-Power's proved and                   
          producing reserves to be $14,447,362, using a 20-percent                    
          before-tax discount rate.  The 1986 LAM updated reserve report              
          indicated that the estimated future net revenues presented                  
          therein were not to be construed as LAM's opinion of the fair               
          market value of the properties included in the report.  Instead,            
          the report presented LAM's opinion of the future net revenue that           
          would be derived from the recovery of the estimated reserves                
          under the assumed timing and economic conditions.                           
               The 1986 LAM updated reserve report estimated Tri-Power's              
          proved and producing reserves, as of November 1, 1986, to be as             
          follows:                                                                    










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