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Seneca 11 Mine <br />SL -6 Phase 111 Bond Release Request <br />June 2014 <br />sampling is demonstrated below based on the following reference area data that is weight <br />averaged. The weighting contribution is mountain brush 83% and sagebrush 17 %. <br />2011 Cover Success Evaluation <br />2011 Mountain Brush Reference Area allowable first -hit herbaceous cover 24.4 x 2 = 48.4% <br />2011 Sagebrush Reference Area allowable first -hit herbaceous cover 44.4 x 2 = 88.8% <br />90 percent of the Cover Standard = 0.90 [0.83(48.4) + 0.17(88.8] = 49.7% <br />The 2011 Phase III bond release BRB -5 sampling at thirty (30) random locations resulted in an <br />allowable first -hit herbaceous cover data value of 59.7% which exceeds the 90 percent cover <br />standard value of 49.7 %. <br />2012 Cover Success Evaluation <br />2012 Mountain Brush Reference Area allowable first -hit herbaceous cover 10.7 x 2 = 21.4% <br />2012 Sagebrush Reference Area allowable first -hit herbaceous cover 28.3 x 2 = 56.6% <br />90 percent of the Cover Standard = 0.90 [0.83(21.4) + 0.17(56.6] = 24.6% <br />The 2012 Phase III bond release BRB -5 sampling at thirty -five (35) random locations resulted in <br />an allowable first -hit herbaceous cover data value of 36.4% which exceeds the 90 percent cover <br />standard value of 24.6 %. <br />Production. The Seneca II Mine herbaceous production standard and evaluation for success is <br />based on a weight averaged value (based on the two primary premine vegetation type <br />contributions to total acreage) for current annual herbaceous production derived from sampling <br />in the approved Seneca II Mine sagebrush and mountain brush reference areas. The weighting <br />contribution is Mountain Brush 83% and Sagebrush 17 %. Based on the production sampling an <br />allowable herbaceous production value is determined by excluding noxious weeds and allowing <br />no more than 10% relative production of annual /biennial weeds. The allowable herbaceous <br />production standard is determined by weight averaging the values based on the percent <br />contribution of the mountain brush and sagebrush types. <br />N <br />