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x .. • • EXHIBTi' E Section 4 - Revegetation and Topsoil Plan Soil Salvage and Stockpiling Soil material suitable for salvage occurs across the project area as evidenced by current agricultural production. Given that a water feature will be created over the majority of the disturbed area, a surplus of suitable salvageable material exists. Therefore, the soil handling program designed for this project concentrates on the salvage of the most desirable surface soils available. Only surface soils characterized by higher nutrient levels and containing endemic microbial populations will be salvaged. Subsoils otherwise suitable for salvage will be handled as overburden and placed into overburden stockpiles to be revegetated at the close of operations. These materials will provide a quality sub-base upon which salvaged soils will be redistributed. A total of 264,000 cubic yards of soil will be salvaged from the acreage to be disturbed. Table E-2: Soil Salvage Depth Summary depicts the depths to which soil can be salvaged from each map unit to achieve the desired salvage volume, The volume of soil to be salvaged from each unit to make up the soil stockpiles will be decided upon at the beginning of operations. Stockpiles will be protected from operational disturbances to maintain their integrity. Stockpiles will assume as low a profile as possible to decrease wind erosion potential and be oriented, along the longitudinal axis, perpendicular to the prevailing wind direction if aerial conditions permit. When portions of the stockpile are removed for soil redistribution, removal will take place on the leewazd side of the stockpile to avoid disturbance on the windward side. Soil stockpiles will be clearly identified with signs to distinguish them from product, or resource, stockpiles. Soil Stockpile Stabilization Soil stockpiles to remain in place longer than one growing season will be vegetatively stabilized following soil placement during the first appropriate planting season. During construction, the surface of the stockpiles will be left in a roughened condition. Fertilizer will be evenly broadcast over the stockpile at recommended rates and the seedbed roughened to incorporate the fertilizer into the seedbed. Seed, at the specified rates, will then be broadcast over the seedbed Table E- 3: Soil Stockpile Stabilization Mixture depicts the species and seeding rates proposed for use. The seedbed will be lightly roughened to cover the seed. The slopes will then be mulched using straw or hydromulch and the mulch anchored to complete the stabilization process. Straw mulch will be applied at a rate of 2.0 tons per acre and hydromulch at a rate of 0.75 to 1.0 ton per acre. On stockpiles with slopes of 2.SH:1 V or less, drill seeding techniques maybe employed to maximize the potential for stabilization. Applied straw mulch would be anchored by crimping under this scenario. Soil Remcement The following guidelines apply to soil replacement over the project area as a whole. During resoiling operations, soil will be redistributed in a manner which: (1) achieves an approximate uniform thickness consistent with safety requirements, post-mining land use objectives, and surface water drainage systems; (2) minimizes compaction and erosion of the soil resource; and (3) minimizes deterioration of the biological, physical, and chemical properties of the soil to the degree possible. Soil will be applied in as thick of lifts as possible to minimize equipment passes over the area to be resoiled.