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3-8 <br />3.3 Topsoil Placement <br />Prior to placement of topsoil on regraded areas, the regraded material will be <br />conditioned with dozer-mounted scarifiers in order to minimize the interface between <br />topsoil and subsoil and to promote establishment of vegetation and maximize slope <br />stability. Topsoil will be placed in lifts of approximately 4" to 8" in thickness by rubber- <br />tired scrapers. The entire affected surface will subsequently be graded and leveled to <br />achieve the final desired contour of the topsoil layer as shown on Figure 3.3-1. <br />The placement of topsoil will be in a manner that will allow for the even <br />distribution of materials throughout the disturbed area from which topsoil was previously <br />removed and which exhibited salvageable material prior to disturbance. The portion of <br />disturbed land located on the canyon floor is primarily associated with road construction <br />and a sedimentation pond. <br />Topsoil will be placed only when in a moderately dry condition in order to <br />minimize clodding and compaction, which can result from multiple passes with scrapers <br />or other equipment. Placement of topsoil will be inspected as necessary to assure <br />• proper depth and soil densities (80 to 95 pounds per cubic foot dry density) are <br />achieved. <br />Disturbances created after the initial mine site construction will have topsoil <br />replaced in depths approximating the depth that existed prior to disturbance. Topsoil <br />will be replaced on the office area to its original depth of two feet, since this area is in <br />an AVF. <br />M`Clane Volume 1 06/04 <br />