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5. Topsoil and Overburden Handling <br />Topsoil will be stripped and stockpiled or directly placed as part of reclamation prior to the <br />commencement of mining in a particular mining area. After stripping, topsoil which will be <br />stockpiled will be seeded promptly in order to minimize soil loss. Topsoil will not be stockpiled in <br />the floodway; rather it will be stockpiled in the permit area above the floodway, or at the bottom of <br />previously mined areas. Most stripped topsoil will be placed to reclaim the previous mining area. <br />There will be an abundance of topsoil due to the reduction in surface area caused by the formation <br />of a lake within the permit area. This excess topsoil will be used for extra growth media as well as <br />slope backfill material during reclamation to create as much undulating shoreline as possible. The <br />estimated topsoil stripping thickness is 3" to 12". <br />Overburden will be stripped prior to the commencement of mining in a particular mining area. <br />Overburden thicknesses range from zero to five feet. Stripped overburden will be used to backfill <br />the mining slopes of the pits from 2H:1 V to 3H:1 V and to create undulating shorelines as much as <br />possible. Details of topsoil and overburden volumes are shown in the Mine Area and Volumes <br />table. <br />6. Mine Plan <br />The overall mining area consists of 7.1 acres in Mining Area 1 and 13.9 acres in Mining Area 2 for <br />a total of 21.0 acres. See Map C-2. Many precautions are in place to ensure that the water <br />discharged is clean. This discharge is regulated by a NPDES discharge permit with the Colorado <br />Department of Public Health and Environment which limits pollutant levels including sediment <br />load in the discharge to many times less than the average sediment load in the river itself. <br />The mining schedule is given in subsection 13. <br />Most facilities will be placed outside the 100 year floodplain in the southeast corner of Mining <br />Area 2. The crusher, portable asphalt plant, portable concrete plant, and screen may be located in <br />the pit. <br />Scott Pit March 10 D-5