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Exhibit D- /1'1%rs1nH Plan <br />Several Best Management Practices (BMPs) will be applied to topsoil removal and stockpiling: <br />• As with all mine related activities, dust emissions resulting from topsoil activities need to <br />be kept to a minimum, and haul routes will be watered as needed. <br />• Stripping of topsoil from the bottom of drainages should be given first priority to prevent <br />contamination of topsoil by disturbed runoff. It may be necessary to strip drainage <br />corridors to establish proper drainage prior to additional topsoil removal. <br />• To minimize compaction, destruction of soil structure and anaerobic decomposition <br />withiu the stockpile, soil removal activities should be scheduled at soil moisture levels <br />sufficient to minimize dust yet dry enough to minimize soil mucking. Ideal soil moisture <br />conditions for soil salvage are above the wilting point and below field capacity. <br />• if the native topsoil is less than 6-inches thick, the topsoil and subsoil material <br />immediately below the topsoil will be removed together, and the entire 6-inch mixture <br />will be treated as topsoil. <br />• Wllere possible, topsoil and subsoil will be separately stockpiled in areas shown on <br />Exhibit C-2. <br />• Topsoil will be stockpiled in such a manner so as to minimize wind and water erosion <br />and unnecessary compaction. The primary methods of erosion control for soil stockpiles <br />are timely revegetation and/or the use of temporary erosion control measures such as <br />surface roughening, surface mulches, berms, ditches, or small sediment traps. All soil <br />stockpiles will be constructed with 2.SH:1 V or flatter slopes, and a ring ditch will be <br />bladed around the base of each stockpile. <br />If topsoil stockpiles are lefr undisturbed for more than one year, a cover crop of Western <br />wheatgrass will be planted on the stockpiles at a minimum rate of 3 pounds of pure live <br />seed per 100 square feet. <br />In limited situations, topsoil and/or subsoil materials may be temporarily stockpiled or <br />windrowed near active operations rather than placed in permanent stockpiles. These <br />situations would occur when the salvaged soil is needed for current reclamation, but the <br />area is not immediately ready for soil to be respread. Temporary soil stockpiles will be <br />seeded as soon as possible after stockpile construction and clearly identified with <br />appropriate signs. A berm will be placed around the toe of the stockpile to contain <br />sediment produced from the stockpile. <br />If the WSF is constructed, the reclaimed surface elevation in Expansion Area North will be <br />approximately level with Brighton Road, sloping down to blend in with the undisturbed banks <br />adjacent to the river. A minimum of 135,000 cubic yards of excavated shale and overburden <br />from the Worthing Pit WSF will be used as backfill. Mining in Expansion Area North will be <br />completed within three years. Backfilling and reclamation activities will require an additional <br />three to five years. The overall duration of Expansion Area North and WSF project is anticipated <br />to be six to eight years. Further information pertaining to the final reclamation surface is provided <br />in Exhibit F-2. No final highwalls will remain, as the pit will be backfilled and graded to blend <br />with the surrounding topography. Reclamation will be completed as discussed in Exhibit E. <br />1898-Frei 112 Ezhibits_(4.20.05).doc D-$ <br />