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1.4 Topsoil Handling for Gold Operation <br /> The total disturbed area for the gold mining operation is 84.5 acres. Of this amount, 36.5 acres were <br /> disturbed pre-1977 and no topsoil was salvaged.Approximately 48 acres of new disturbance will occur <br /> if all mine cuts are disturbed.The salvageable soil for the undisturbed areas is approximately 3-9 inches. <br /> An average of 4.5"thickness is assumed for the topsoil volumes from the undisturbed areas. <br /> The Ducommun Business Trust will do everything possible to reclaim old pre-law areas, but the fine <br /> material that will be used to replace the lost topsoil can only be obtained from future operations. <br /> Since the Trust cannot guarantee that future operations will be in place for the years shown in this <br /> application, the Trust cannot guarantee that all previously disturbed areas will be topsoiled. The Trust <br /> can guarantee that the operation will salvage all substitute fine material possible from all future <br /> operations. In order to help reclaim past mining areas, substitute topsoil will be obtained from sediment <br /> pond cleanout, pit pumping pond cleanout and slurry pond cleanout from the prep plant. This material <br /> will be silty fine material and will be amended with fertilizer and mulch for reclamation.In order to place <br /> 4.5" of this material on the areas from pre-law disturbance less pond areas left for the final reclamation, <br /> (36.5 acres- 4.4 acres pond areas for reclamation = 32.1 acres), approximately 19,420 cy is needed. <br /> Assuming 10 years of topsoil salvage, 1297 cy is needed per year. The majority of this material will be <br /> obtained from cleanout of the slurry ponds from the prep plant.At least every two years,cleaned material <br /> will be respread over regraded areas,which will then be seeded and mulched. Therefore,approximately <br /> 2594 cy will be spread over 6.4 acres per year. <br /> Since the plant area cannot be reclaimed until the end of the mine,the silty material for this area will be <br /> stockpiled as shown on Map C-2. This area is approximately 10 acres, therefore, 4000 cy will be <br /> stockpiled for final reclamation.All topsoil piles will be constructed to 2.5H1 V slopes and will be seeded <br /> and mulched if they are to be in place over one year. The temporary seed mix for topsoil stockpiles is <br /> given below: <br /> Alma Place Mine 01/15 23 <br />