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Mining Plan -cont. <br />The deposit fairly clean alluvial gravel from the Gunnison River flood plain and is approximately <br />25 to 30 feet thick with an overburden and topsoil cover of about 3 to 12 feet with an estimated <br />average of 7.5 feet. There are areas where the cover may be thinner or contain significant <br />amounts of rocky material that makes it less desirable for quality topsoil. The operator commits <br />to retaining enough quality topsoil for anticipated reclamation requirements. This property has <br />been continuously cultivated for many years and it is expected that in less rocky areas, 9 to 15 <br />inches of good topsoil can be salvaged. <br />The stratum underlying the gravel deposit is the Mancos Shale. Mining operations will maintain <br />approximately 2 feet of gravel cover over the shale to avoid oxidation and release of Selenium <br />into the discharge water. <br />The primary commodities from the mined material will be sand and gravel for construction <br />aggregate. It is possible that portable concrete or asphalt plants may be on site on a temporary <br />basis as specific projects may require. Crushing and screening operations will be sub - contracted <br />to portable plants during the warmer months of April through September. Sales from stockpiled <br />material will continue year round. Dewatering will continue year round and mining excavations <br />will be on an as needed basis. Secondary commodities will be excess overburden for use as <br />clean fill and excess topsoil for projects that require suitable growth medium. <br />There will be no use of explosives used at any time for any purpose on this site. <br />Warren Pit 2012 <br />