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3-12 <br />• <br />3.4 Surface Preparation Topsoil Placement <br />Prior to placement of topsoil on regraded areas, the regraded <br />material will be conditioned with dozer-mounted scarifiers in <br />order to minimize the interface between topsoil and subsoil and <br />to promote establishment of vegetation and maximize slope stabi- <br />lity. Topsoil will be placed in lifts of approximately 4" to <br />8" in thickness by rubber-tired scrapers. This will allow for <br />the topsoiling of 12 t~ Y8-crses. The entire affected surface <br />will subsequently be graded and leveled to achieve the final de- <br />sired contour of the topsoil layer as shown in Figure 3.1-1. <br />The placement of topsoil will be in a manner that will allow for <br />the even distribution of material in the disturbed area from <br />• which topsoil was previously removed and which exhibited salvable <br />topsoil prior to disturbance. The fill material along the road / <br />will not require topsoiling as it is fair for reclamation and suc- <br />cess should be adequate (See Table 3.3-1). <br />The portion of distuubed land located on the canyon floor is pri- <br />marily associated with road construction and a sedimentation pond. <br />Topsoil will be placed only when in a moderately dry condition in <br />order to minimize clodding and compaction which can result from <br />multiple passes with scrapers or other equipment. Placement of <br />topsoil will be inspected as necessary to assure proper depth and <br />soil densities (80 to 95 pounds per cubic foot dry density) are <br />achieved. <br /> <br />