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Overburden will either be stockpiled on Phase 4A or placed back in the pit slopes as an on going <br />reclamation effort. Prior to moving into Phase 4A the remaining overburden on that phase will be <br />placed in the pit floor. Once mining operations have ceased, overburden will be placed back into <br />the pit slopes to meet reclamation needs. <br />Once a phase gets stripped of overburden a front end loader will be utilized to mine the sand and <br />gravel deposit. Material at the face will be loaded into an overland conveyor which transports the <br />minerals to a processing plant. Sand and gravel will be mined in 25' lifts down to an elevation <br />approximately 2' above the water table. Highwall slopes will typically be 25'(h):25'(1) with 20' <br />catch benches although some areas will be mined 3:1. <br />A portable aggregate processing plant will be used on site for crushing, screening, and washing the <br />raw materials. The processed materials will then be used at the concrete and temporary asphalt <br />plants, which are also proposed to be located at the Cerise Mine Plant Site, or they will be <br />sold/delivered offsite for commercial, residential and government projects. Initially this plant will <br />sit on top of Phase 3, but as soon as practicable it will be relocated into the floor of Phase 2. <br />All surface water within the mine areas will drain internally. There will not be any uncontrolled <br />release of surface water and sediment from the mining area. Storm water collected in the open mine <br />will be managed in accordance with Colorado/NPDES discharge permit requirements. Sediment <br />generated from localized storm water runoff and surface drainage will be managed according to the <br />approved Stormwater Management Plan. <br />Water rights at the site will be used for dust control operations along the roads, stockpiles and <br />berms. The water balance discussed in Exhibit G estimates the gallons per week necessary to limit <br />dust emissions. The water will be applied using a water truck. <br />No explosives are planned to be used as part of the mining operations. <br />Topsoil and Overburden <br />Topsoil and overburden will be stripped with scrapers or a dozer and placed in stockpiles within the <br />permit boundary. Slopes on the stockpiles will range from 2:1 to 3:1. The topsoil will be <br />segregated and stored separately from the overburden material as required by Rule 3.1.9(1). <br />The topsoil will be placed in berms around the perimeter of the mine cells so they can serve as a <br />visual barrier (see Exhibit Q. These topsoil stockpiles will be protected from wind and water <br />erosion by vegetative cover (see the Native Seed Mix found on page of Exhibit E). The <br />stockpiles will be broadcast seeded and incorporated into the weed control program. Weed control <br />consists of monthly inspections and, if necessary, chemical treatments in the applicable fall and <br />spring seasons. The topsoil stockpiles will be vegetated as soon as possible considering the seeding <br />"window" for the Native Seed Mix which is between April 15 and October 15. <br />Overburden stockpiles will be both inside and outside the mining cells. Piles which have been <br />placed outside of areas to be mined will typically remain for the majority of the life of the mine so <br />they will be seeded as soon as possible depending on the seeding "window" parameters for the <br />Native Seed Mix. Due to the small size of the site, there will be temporary overburden piles within <br />Cerise Mine <br />DRMS 112 Reclamation Permit Application <br />Page D2 of D5