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6.4.4 EXHIBIT D — MINING PLAN <br />Water Diversions <br />Water diversions will include pumping groundwater from a deep sump within the <br />slurry wall, before discharging to the South Platte River to the west of the permit <br />area (see Exhibit C-2). This pumping will be accomplished after the installation <br />of the slurry wall, but prior to sand and gravel mining below the water table. <br />Plant wash water will be obtained from an existing permitted alluvial well on the <br />property owned by the applicant that is outside of the perimeter of the slurry wall. <br />Wash plant water is recycled in a continuous loop and will only need to be <br />occasionally supplemented with the alluvial groundwater from the well. <br />Timetable and Size of Mining Areas <br />The mining operation is expected to last for approximately 7-9 years, however, <br />this could vary depending upon market conditions. The approximate size of <br />areas to be worked at any one time correlates to the size of the mining Cells <br />shown on Exhibit C-2. Table 6.4.4-2 shows the mining Cell size and the <br />approximate timetable for working each Cell. <br />Table 6.4.4-2. Mining Timetable <br />MINING CELL <br />APPROXIMATE AREA TO <br />BE WORKED AT ANY ONE <br />TIME [acres] <br />APPROXIMATE <br />TIMETABLE <br />[years] <br />Cell 1 <br />27 <br />3-4 <br />Cell 2 <br />23 <br />2-3 <br />Cell 3 <br />4 <br />0.5-1 <br />Cell 4 <br />4 <br />0.5-1 <br />TOTAL <br />58 <br />7-9 <br />Nature of the Deposit <br />The average overall total overburden thickness is approximately 3.5 to 4.0 ft. Of <br />that overburden, a large portion of the proposed permit area contains two types <br />of topsoil that vary from within 6" to 24" in depth. Much of this soil has been <br />overgrazed and compacted. The majority of this topsoil is in the range of 12" to <br />24" in depth. This covers at least 50 acres of the site, except for the steeper area <br />on the very eastern/south-eastern edge of the permit area. This topsoil will be <br />stripped by scrapers and segregated from the underlying overburden and placed <br />into separate stockpiles as shown on the mine plan (C-2) prior to overburden <br />removal and stockpiling by the same method. All topsoil and overburden <br />stockpiles will be vegetated with a temporary cover crop/seed mix if remaining for <br />more than one year in an undisturbed state. <br />July 2015 Chavers Mining Resource <br />Regular 112 Permit Application <br />