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HCWCD REVEGETATION PLAN: PAGE 2 <br /> Soil Ratings per the Web Soil Survey <br /> These soils are rated "poor" for sources of gravel however on-site <br /> investigation has shown that the area has some gravel source potential. <br /> None of these soils are considered hydric <br /> None of these soils are considered prime farmland <br /> Use of these soils for "pond" is somewhat limited due to seepage and slope. <br /> This will be overcome by use of a clay liner. <br /> Groundwater in not anticipated to be intercepted during mining or <br /> construction. <br /> The following steps are recommended to revegetate area to be <br /> disturbed <br /> Step 1 - Topsoil should be removed and stockpiled. When mining is <br /> completed, the topsoil should be placed so that at least six inches of topsoil <br /> material is covering the subsoil material. Topsoil amounts exceeding six <br /> inches in depth will result in increased seeding success. <br /> If the topsoil will not be used within one year, then it should be seeded with <br /> the seed mixture listed in step #5 or an annual sterile hybrid (e.g. sterile <br /> triticale) to protect it from erosion and keep it biologically active. Estimated <br /> available topsoil is six inches to twelve inches. <br /> Step 2 - Prior to revegetation, the area should be banksloped so that no <br /> slope exceeds a 3:1 slope. Slopes greater than 3:1 will need to have a <br /> rolled erosion control product (RECP) applied after seeding to reduce erosion <br /> and increase seeding success. Roads and other similarly disturbed areas <br /> should be graded or reworked so as to blend into or approximate the <br /> surrounding landscape as closely as possible. Rough areas should be <br /> smoothed to permit easier seeding and mulching. At least eighteen inches of <br /> subsoil material should remain on-site prior to spreading the topsoil. The <br /> subsoil material should not be over-compacted. Plant roots will not be able <br /> to grow in heavily compacted subsoils. Also, compaction reduces the <br /> amount of water available to the plant. Additional soil material, topsoil or <br /> subsoil, will increase the success of the seeding. When banksloping and <br /> shaping of the subsoil is complete, scarify the area to a depth of six inches to <br /> permit better bonding between the subsoil and the topsoil. After <br /> scarification, the topsoil should be uniformly spread over the area. <br /> 036 <br />