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REVEGETATION RECOhQ~fENDATZONS <br />• <br />Summary: The revagetation recommendations should include <br />methods to save existing topsoil, ground preparation, slopes, <br />mulching specifications, seed and method of seeding, <br />fertilization, and maintenance follow up. <br />Topsoil: Although the present topsoil is limited in depth, <br />rt will work as a medium for plant growth. As explained <br />b9 Cliff Thorne the topsoil is presently being stockpiled <br />and used as the revegatation process continues. A cover <br />of topsoil 4 - 6" in depth with the present material could <br />be used. I would also leave all rocks in the soil on the <br />area to be reseeded. The rocks will act as moisture <br />retainers by shading small areas, end provide areas where <br />the grass seed rill be protected from adverse conditions. <br />The rocks will also blend in with the present landscape. <br />Slopes: Where possible, the slopes that are to be <br />revegetated should be kept at a 3:1 or flatter. If this <br />is not possible the soil should be left at as angle close <br />to the natural angle of repose for the soil. (1~ -1 or <br />2 - 1). Since the area to be revegetated will not cover <br />a large portion of the mine site, the slopes should be <br />left rough enough to prevent eater from concentrating <br />• and causing gully erosion. .Where eater from an adjoining <br />slope will cross the elope to be revegetated, a small <br />berm oa grade should be constructed to exit the water to <br />as area which is vegetated and the possibility of erosion <br />is lessened. <br />Ground Preparation: Areas to be reseeded should have <br />4 - 6" of topsoil (use soil on site) applied. The top- <br />soil should be applied to a roughened surface to prevent <br />slippage and to form a better bond between the overburben <br />and the soil. <br />Hfulchinq: I strongly recommend a mulch be placed over ~ <br />the area that is seeded. A straw mulch or an application <br />of manure in clod form will help retain moisture, protect <br />new seeding, minimize high intensity storm impact and ~ <br />prevent serious wind erosion. If stray mulch is used <br />it is recommended that 70 - 90 lbs. of straw hay/100'sq. <br />ft, be used. After the hay is applied it should be <br />crimped into the soils with a crimper with strsinght discs. <br />Fertilization: Just before the seedbed is to be final <br />graded an application of fertilizer to aid plant establish- ~ <br />ment should be applied. A fertilizer with a high nitrogen I <br />high phosphorus content should be used (30-20-5). The <br />fertilizer should be spread at a rate of 1 lb/1000 sq. ft. <br />i <br />i <br />.~ <br />'I . <br />i <br />