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_ . ~. - REVEGETATION REC01~AtENDATI0N5 • Summary: The revegetation recommendations should include methods to save existing topsoil, ground preparation, slopes, mulching specifications, seed and method of seeding, fertilization, and maintenance follow up. Topsoil: Although the present topsoil is limited is depth, it will work as a medium for plant growth. As explained by Cliff Thorne the topsoil is presently being stockpiled and used as the revegetation process continues. A cover of topsoil 4 - b" in depth with the present material could be used. I would also leave all rocks in the soil on the area to be reseeded. Ths rocks vi.11 act as moisture retainers by shading small areas, sad provide areas where the grass seed will be protected from adverse conditions. The rocks xi.ll also blend in with the present landscape. Slopes: [there possible, the slopes that are to be revegetated should be kept at a 3:1 or flatter. If this is not possible the soil should be left at an angle close to the natural angle of repose for the soil. (1-~ -1 or 2 - 1). Since the area to be revegetated vi.l.l not cover a large portion of the mina site, the elopes should be left rough enough to prevent eater from concentrating ~ • and causing gully erosion. Where water from an adjoining slope will cross the slope to be revegetated, a small berm on grade should be constructed to exit the rater to as area which is vegetated end the possibility of erosion is lessened. Grouad Preparation: Areas to be reseeded should have ~, ~. - b" of topsoil (use soil on site) applied. The top- soil should be applied to a roughened surface to prevent i slippage and to form a better bond between the overburben i• and the soil, j Mvlchin~: I strongly recommend a mulch be placed over the area that is seeded. A straw mulch or an application of manure in clod form cri.ll help retain moisture, protect nee seeding, minimize high intensity storm impact and prevent serious wind erosion. If straw mulch is used it is recommended that 70 - 90 lbs, of straw hay/100'sq. ft. be used. After the hay is applied it should be crimped into the soils with a crimper with strainght discs. Fertilization: Just before the seedbed is to be final graded an application of fertilizer to aid plant establish- ment should be applied. A fertilizer with a high nitrogen high phosphorus content should be used (30-<0-b). Tha . fertilizer should be spread at a rate of 1 lb/1000 sq. ft.