2018-06-11_PERMIT FILE - M2008017 (11)

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EXHIBIT E Reclamation Plan Water storage will be the primary final reclaimed use for the Derr Pit Project site. Portions of mining areas will be backfilled and reclaimed as "native" areas, which will be re-seeded with native vegetation and will also include areas where native trees could be re-planted. The majority of the mining areas will be reclaimed as a water storage reservoir. The remaining area within the proposed permit boundary will consist of reservoir shoreline, unimproved access roads around the reservoir, and reclaimed or otherwise undisturbed land. The approximate acreage of each of these areas is: Final Land Use Reclamation Alternate Plan Area Reclamation Plan acres Area acres Reservoirs Water Surface 64.30 68.41 Street/Count Roads/Access Roads 4.65 4.65 Reclaimed Vegetated Land and Undisturbed 71.10 71.99 Land TOTAL 145.05 145.05 Water Storage Reservoir(s) In general, the mining limits will be mined to the siltstone/claystone bedrock. The relatively impermeable bedrock will make the bottom of the reservoir. The reservoir will also be separated from the surrounding alluvial aquifer by a slurry wall liner. The slurry wall liner will be keyed into the bedrock material and extend upward through the entire height of the alluvium. Design specifications and quality control procedures used during construction of the slurry wall liner will ensure that the reservoir meets State Engineer's Office (SEO) performance standards for permeability. The slurry wall liner will be constructed between year two and year three of the mining. All reservoir slopes left by the mining operation will be reclaimed to at least 3H:1V final grade. Reclamation of the exterior cell walls will be concurrent with mining. Since reclamation will be concurrent with mining, most soil, overburden, and bedrock material excavated during mining will be used almost immediately. Scrapers and dozers will be used to place overburden material along the reservoir perimeters to achieve the final grade. Upon placing the backfill material, 95 percent compaction will be achieved to insure adequate integrity of the slope. Final reclamation by capping with topsoil and re- vegetating above the expected reservoir water level will follow backfilling operations closely to minimize the amount of disturbance at any one time. After reclamation activities are complete and the permit is released, inlet and outlet facilities for the reservoir will be designed and installed once the end use of the proposed reservoir(s) has been identified. The general location for the inlet/outlet facility has been shown on the reclamation plan map for reference. It is anticipated that the Derr Pit Project J&T Consulting, Inc. DRMS 112 Permit