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Idazado Mining Company <br />CMLRB Permit 77- 403 <br />Reclamation-Materials Handling <br />Page 2 <br />Therefore, a signed affidavit certifying the material as clean and inert is not provided and <br />the transmittal of geochemical chazacterizations are not currently available. <br />The purpose of this Technical Revision is to ensure that mining and milling related <br />materials previously deposited within the confines of the Idarado Legacy Project- <br />Pandora, Liberty Bell and Gold Run housing sites as approved by the San Miguel County <br />aze appropriately identified, chazacterized, collected, stored and closed within a mine <br />closure unit at the Pandora Mill location that provides for the future protection of surface <br />and ground water resources. Upon final geochemical characterization, depending on the <br />geochemical nature of the materials, the storage location will be contoured to a minimum <br />3H:IV configuration as identified on the attached drawing, and if the materials aze <br />determined to be acid generating the materials will be either geochemically neutralized <br />with limestone to the required Division's AGP:NNP ratio and then covered with growth <br />medium and revegetated or the materials will be provided with the engineered GCL and <br />growth medium cover presented in the attached drawing. The final growth medium cover <br />will be revegetated with the seed mixture identified in the Idazado Reclamation Plan. <br />During excavation and construction of the storage location, each storage location will be <br />provided with stormwater and erosion control features to prevent the migration of <br />materials from the storage locations. Such control measures shall be comprised of silt <br />fencing, straw/hay bale erosion control structures, stormwater collection, and interim <br />stabilization of the storage facility surface using either interim seeding or soil binding <br />additives. The approximate volume of materials to be excavated, transported and stored <br />is unknown at this time. Until actual excavation of the development azeas aze conducted <br />and completed, the volume estimates aze unknown. <br />Enclosed is a check in the amount of eight-hundred and seventy five dollazs ($875) for <br />the processing of this Technical Revision. <br />Following review of this correspondence should you have any questions, please contact <br />me at (303) 837-5852. <br />Sig erely, <br />rsll Y <br />Vice = resident/Site Manager <br />Cc: Bob Oswald <br />file <br />