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MININO PLAN EXHIBIT 0 (CONT) <br /> Around the rest of the mine, the setback line will be to the <br /> outer edge of the slurry wall or the top of the excavation limits. <br /> The temporary topsoil stockpiles placed within the setbacks will <br /> also limit noise and visual impacts to off site areas. In some <br /> cases, the setbacks will be used as a place for roads to access <br /> the mine exterior, ditches and access for the oil and gas facili- <br /> ties. The setback areas will be reclaimed if disturbed. <br /> The following information is a recap of the methods currently <br /> used at the mine and will continue to be used as mining progresses <br /> through the areas added by this amendment. This mine will be <br /> operated as a dry-mine. Slurry walls will be constructed to the <br /> Division of Water Resources specifications around the perimeter of <br /> each additional mine area prior to commencement of mining in the <br /> new phases. This isolates each mining area from the surrounding <br /> groundwater table and allows for dry-mining of each mine area. <br /> However, if a slurry wall is not feasible, the Applicant will <br /> utilize a compacted liner to seal the reservoir areas for the end <br /> use as water storage. Design of the liner will follow the Divi- <br /> sion of Water Resources Guidelines also. Slurry wall design <br /> documents were submitted and deemed adequate to the Division in <br /> 1999. Slurry walls installed using this design have been con- <br /> structed successfully on the 5 lined areas currently complete(and <br /> the 6 already released from the permit) . <br /> Additional monitoring wells have been installed along the <br /> western, eastern, and northern sides of the new areas in the <br /> amendment area. Ground water monitoring, and ground water quality <br /> testing plans are included in EXHIBIT G-WATER for the amendment <br /> areas. <br /> Prior to mining moving into those areas just north of WCR <br /> 14 .5, the Plant Site will be moved to the Parker #4 Phase in the <br /> southern area, adjacent to the access road that now serves the <br /> agricultural areas. <br /> Mining operations within each new phase area will include <br /> topsoil and overburden stripping, and excavation of dewatering <br /> trenches, and settling ponds. Raw materials will be excavated <br /> with excavators, front-end loaders, scrapers and/or bulldozers. <br /> As areas are cleared and stripped, previously mined slopes will <br /> receive backfill material to establish the permanent design side <br /> slopes. A conveyor is used to transport the raw material from the <br /> areas north of WCR 18 to the Plant Site in the existing mine. <br /> Explosives will not be used at this operation. <br /> The reservoir access roads will be placed in the 25 foot wide <br /> setback between the slurry wall and the top of the slope into the <br /> reservoir. The disturbed areas from the setback line to the water <br /> line or top of bank armoring, will be left as a gravel surface <br /> instead of being resoiled and seeded. Adequate amounts of the <br /> stripped topsoil and overburden will be stockpiled for later use <br /> in reclamation in the areas that will be seeded. Topsoil and <br /> overburden stripped from subsequent mine areas may be placed <br /> directly on the seed bed in previous mine areas so it only has to <br /> be handled once and the disturbed areas will be concurrently <br /> reclaimed. The exact location of topsoil and overburden piles are <br /> L.G. Everist, Inc. M-1999-120 <br /> Ft.Lupton Sand and Gravel November,2024 <br /> 6 <br />