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<br />or contaminated by the ongoing mining operation and where the stored topsoil will not be lost to wind <br />erosion or surface runoff. When a topsoil stockpile is placed, it will not be moved until soil is needed <br />for distribution on graded areas, or with DMG approval, is consolidated into other existing stockpiles. <br />Stockpile locations were also evaluated and selected to minimize scraper travel distance, to reduce <br />equipment cost, and to increase efficiency. <br />Two classes of topsoil stockpiles, irrigated/pasture and dryland pasture will be established. <br />Irrigated/pasture topsoil stockpile locations will include two piles; one for first lift material (A and upper <br />B horizon) and the other for second lift topsoil (Icwer B and C horizonsJ. Dry pastureland topsoil <br />stockpiles will only include one pile for mixed single lift soil (A, B, and C horizon). Mine personnel are <br />instructed that topsoil stockpiles are not to be disturbed or contaminated. Signs will serve as <br />continuing reminders to personnel that stockpile areas are to be preserved and undisturbed. <br />Any topsoil stockpile which will remain in place less than 90 days will not be revegetated. The surface <br />of each pile will be left in a toughened condition to retard wind and water erosion. Aself-contained V- <br />ditch or berm will be constructed around the perimeter of the stockpile to prevent loss of the topsoil <br />resource. <br />Any topsoil stockpile which will remain in place 9D to 180 days will be stabilized by utilizing an annual <br />grain (wheat or barley) cover crop. The seeding rate will be 20 pound (PLS) per acre drilled or 40 <br />pounds (PLS) per acre broadcast. <br />Protection and maintenance of "long-term" topsoil stockpiles will begin when a stockpile is temporarily <br />or fully completed and no more additions or withdrawals of topsoil are to be made within a 180 day <br />time period. Topsoil stockpiles will be stabilized primarily by perennial plant establishment. The seed <br />mixture, and seeding rate for long-term topsoil stockpiles is described in the Revegetation Plan, Section <br />2.05.4 (2)(e). <br />Establishing vegetative cover will aid in overall stabilization and erosion control of stockpiles. Vegetative <br />cover will aid in reducing runoff and raindrop impact and will increase moisture infiltration by <br />maintaining the upper soil surfaces in a friable, noncrusted condition. Organic matter, soil nitrogen, <br />and microorganism activity will be maintained or enchanced by the seeding of deep rooted species or <br />species with fibrous root systems. <br />Is/sat 2.05.4(2)(d}8 <br />