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backfill material. Additionally, it is not likely that acid forming or toxic materials will be <br /> encountered during mining. The mining will not leave high walls on the property. In <br /> addition, there will be no auger holes, excavations, or shafts left on the property. <br /> Overburden and topsoil that is removed during the mining will be used to reclaim the <br /> mining slopes and areas that are disturbed during the mining such as haul/access roads <br /> and the recharge pond. Overburden will be placed in the areas such as haul/roads and <br /> the recharge pond to bring the grade to the final reclaimed elevation. The overburden <br /> may also be spread on the 3H:1V mining slope to use the excess overburden to <br /> exhaustion. This will be accomplished by using a dozer to spread the overburden <br /> material to a depth of one foot or less across the entire mining slope thus maintaining a <br /> 3H:1V slope. The slope will be compacted as described in the previous paragraphs for <br /> the Water Storage Reservoir. Topsoil will then be placed to finalize the grading such <br /> that seeding can occur. The topsoil will be placed at all disturbed areas and on the <br /> mining slope to an elevation matching the expected reservoir water level. <br /> Top soiling <br /> The top six inches of soil on the property is classified as topsoil. This layer includes the <br /> root zone of grasses and crops, which will be stripped and stockpiled separately. By <br /> using concurrent reclamation techniques, the topsoil is not expected to remain in <br /> stockpiles for more than one to five years. If the stockpile remains more than one <br /> growing season, it will be seeded with a fast growing vegetative cover to prevent <br /> erosion. All topsoil will be retained on-site to reclaim the reservoir shoreline, and other <br /> areas disturbed by mining activities. Where required, topsoil will be replaced to a depth <br /> of approximately twelve inches. <br /> Revegetation <br /> As mining operations are completed, areas for reclamation will be graded and shaped <br /> for revegetation. Runoff or excess water from adjacent areas will not be allowed to flow <br /> over slopes being graded and seeded. If needed, berms or channels will be constructed <br /> to divert excess water and dispose of it in a safe and non-erosive manner. <br /> Upland Areas. For disturbed upland areas, the reclamation plan includes re-vegetating <br /> with appropriate seed mixes to minimize erosion and reestablish natural terrain. The <br /> grass mixture below was selected to be long lasting and regenerating, as recommended <br /> by the Greeley NRCS field office. The ground will be fine graded prior to seeding <br /> according to recommendations from the Natural Resource Conservation Service. <br /> Reservoir side slopes below the anticipated reservoir water level will not be seeded. <br /> The proposed seed mix is shown in the following table. <br /> Upland Grass Seed Application Rate* % in mix <br /> #PLS/acre) <br /> Switchgrass (Greenville, Nebraska 28, 0.8 #PLS/ac 20 <br /> Blackwell, Pathfinder) <br /> Yellow Indiangrass (Lano, Holt, Cheyenne, 1.0 #PLS/ac 10 <br /> Oto) <br /> Derr Pit Project <br /> � ,1&T Consulting, Inc. <br /> DRMS 112 Permit <br />