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n <br /> Transit Mix Concrete Co. <br /> Approximately 193,000 bank cubic yards (bcy) of topsoil are expected to be salvaged from the <br /> 239 acres of affected areas in the Plan. This volume may increase or decrease based on the <br /> actual amount of available topsoil. <br /> Transit Mix will store topsoil temporarily in dedicated stockpiles, TS1, TS2, TS3, and TS4 as <br /> shown on Figures C-4 through Figure C-8. Topsoil from Phase I and Phase II will be temporary <br /> stored in TS1, TS2, and TS3; topsoil from Phase III will be temporary stored in TS4; and topsoil <br /> from Phase IV and Phase V will be direct hauled and placed on regraded areas as available. The <br /> topsoil stockpile will be constructed in lifts from the bottom up. These lifts will be approximately <br /> 5 to 1Oft in height. The equipment (dozers, trucks, etc.) working on the stockpile will provide <br /> compaction of the material being placed.Water will be diverted around topsoil stockpiles. Topsoil <br /> stockpiles will be surrounded by a berm to prevent topsoil loss. Additionally, stockpiled topsoil will <br /> be seeded with a temporary seed mixture (shown on Table E-2) selected to establish quickly and <br /> prevent topsoil loss due to wind and water erosion, as discussed in the reclamation plan, Exhibit <br /> E. <br /> After the topsoil has been removed and stockpiled, overburden material, unsuitable for processing <br /> during Phase I and Phase II will be removed and hauled to stockpile F1 as shown in Figures C- <br /> 4 through Figure C-5. During Phase III, overburden material, unsuitable for processing will be <br /> removed and hauled to stockpile F1 and in-pit backfill F2 and F3 as pit floor area is available. <br /> Additionally, fines generated from processing the granite and diabase will be hauled to stockpiles <br /> F1, F2, and F3. However, as discussed below, contemporaneous reclamation activities will occur <br /> throughout mining operations as feasible and as areas become available. Whenever practical, <br /> topsoil, overburden, and fines will be direct hauled and used to backfill and reclaim mining pits. <br /> Drilling and blasting will begin at the top of the Quarry and proceed downward in benches to <br /> remove the competent granite and diabase in accordance with the bench design proposed in the <br /> geotechnical analysis. Pre-split blasting will be used if field conditions warrant. Each bench will <br /> be 40 feet high with final benches at the pit wall blasted to approximately a 63-degree angle. The <br /> benches will be 20 feet wide so that the overall slope is 1:1(H:V) as illustrated in Figure C-10. <br /> These parameters are based on geotechnical investigations and are similar for other mines in the <br /> area. A copy of the geotechnical investigation conducted for project area is attached as Exhibit <br /> 6.5. The Quarry was designed with a factor of safety of at least 1.3 for all benches, highwalls, and <br /> slopes to exceed national standards. <br /> Most of the granite and diabase resource will need to be drilled and blasted for economic <br /> production. All blasting will be conducted by trained, experienced, and competent persons who <br /> understand the hazards involved in a blasting operation. Blasting will be scheduled in such a way <br /> that the impact will be minimized to the nearby areas. Explosives will be used to fracture and <br /> fragment granite or diabase to facilitate material handling. Blast holes will be drilled using a <br /> hammer drill, with the size and blasting pattern designed to assure a safe working buffer from <br /> other Quarry activities and have no detrimental impact beyond the permit boundary. The weight <br /> of explosives for each drill hole will be based on the desired size fraction of granite or diabase <br /> Hitch Rack Ranch Quarry Permit Application <br /> October 3,2017 D-6 <br />