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9.0 Topsoil Storage <br />When the direct haul of topsoil is not feasible, the topsoil will be stored in stockpiles (see Map <br />2.04.9 -2). This map shows the current volume of the existing stockpiles, the volume of the <br />existing stockpiles and the approximate volume of new stockpiles that have not yet been <br />constructed. Stockpiling of topsoil will be required for topsoil removal in the initial box cut, haul <br />road, spoil stockpile areas, sediment pond, shop area, and final pit/highwall reduction areas, <br />Topsoil stockpiles will be located in areas that will not be disturbed or contaminated by the <br />ongoing mining operation and where the stored topsoil will not be lost to wind erosion or surface <br />runoff. When a topsoil stockpile is placed, it will not be moved until soil is needed for <br />distribution on graded areas, or is consolidated into other existing stockpiles. Stockpile <br />locations were also evaluated and selected to minimize truck travel distance, to reduce <br />equipment cost, and to increase efficiency. <br />Mine personnel are instructed that topsoil stockpiles are not to be disturbed or contaminated. <br />Signs will serve as continuing reminders to personnel that stockpile areas are to be preserved <br />and undisturbed. <br />Any topsoil stockpile which will remain in place less than 90 days will not be revegetated. The <br />surface of each pile will be left in a roughened condition to retard wind and water erosion. A <br />self- contained grader ditch or berm will be constructed around the perimeter of the stockpile to <br />prevent loss of the topsoil resource. <br />Any topsoil stockpile which will remain in place 90 to 180 days will be stabilized by utilizing an <br />annual grain (barley, oats or wheat) cover crop. The seeding rate will be 70 pound per acre <br />broadcast. <br />Protection and maintenance of "long- term" topsoil stockpiles will begin when a stockpile is <br />temporarily or fully completed and no more additions or withdrawals of topsoil are to be made <br />within a 180 day time period. Topsoil stockpiles will be stabilized primarily by perennial plant <br />(Revised October 2009) 2.05.4(2)(d) -35 <br />