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Topsoil that is stripped and not required for the construction of the stormwater control berms will <br /> be immediately placed as part of contemporaneous reclamation, stockpiled on-site in the topsoil <br /> storage area, or shipped offsite to enhance reclamation at other Elam Construction sites. <br /> Temporary stockpiles of overburden or topsoil required for reclamation will typically be 20 feet <br /> in height. Temporary stockpiles will be located in the designated area shown on Map C-3. <br /> Because excavation will proceed to final mine slopes and grades of 3H:1 V or shallower(Map C- <br /> 3), it is anticipated that minimal backfilling with overburden will occur during reclamation. <br /> Overburden present on site will be stripped during mining and either placed directly on mined <br /> out ground as part of reclamation, stored in the stockpile area, or be sold as fill. Mining to final <br /> slopes and the direct placement of overburden onto reclamation slopes will reduce the need to <br /> stockpile overburden material and shorten the time that it will take to reclaim the mine. Details <br /> on topsoil and overburden quantities and material balance can be found in Table D-2 and Table <br /> E-2. <br /> 1.2 Mining Phases <br /> Mining will take place in a single phase. Once topsoil and overburden are stripped from the site, <br /> the deposit will be mined using shovels or loaders and haul trucks. The groundwater table is <br /> roughly seven feet below ground level based on Elam's experience at the 23 Road Pit adjacent to <br /> the west. Since groundwater will be exposed/encountered during mining,the entire pit will be <br /> dewatered using a pump. Details regarding this dewatering can be found in Exhibit G. <br /> Mining will progress in the dewatered pit as shown on Maps C-2 and C-3. All mining will be to <br /> final 3H:1 V slopes on the perimeter. The active mining highwall will be mined to the halfway <br /> point of the final 3H:1 V mining slope. The maximum length of vertical slope will be 1500 feet. <br /> This means that at no point in the operations life will backfill be required for reclamation; only <br /> highwall knock down will be needed to establish final slope. The maximum disturbance at any <br /> time will be at the end of the mine life when the largest lake is present and the largest amount of <br /> rangeland requiring topsoil and revegetation is present. This scenario will determine the bond <br /> calculation and is discussed in detail in Exhibit L. <br /> 23 114 West D-2 <br /> October 2020 <br />