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<br />• l2. Topsoil HandlinE and Storage <br /> <br />EXHIBIT D -MINING PLAN (continued) <br />Information on the soil types and depths on the existing site is given in Exhibit [ -Soils Informa- <br />tion. For the mine operation on the east side of the drainage, 15.2 acres will be disturbed for pit <br />mining and facilities. Although the SCS general soils information estimates the soil depth can be as <br />deep as 60 inches, our observation from test holes on the property suggests a more realistic figure <br />of 4 to 8 inches, averaging 7 inches, of salvageable soils. It is expected that the topsoil stripping <br />depth is 6-8 inches over this area. At an average depth of 7", this will require topsoil storage of <br />14,300 cy. The south berm will handle 7800 cy and the remaining 6500 cy will be stored in the <br />excess stockpile located west of the drainage, as shown on Exhibit C-2. When mining is completed <br />on the area east of the drainage, the excess topsoil and newly stripped soil from the west side will <br />be used to reclaim the east side. The west side pit area will encompass 12.4 acres and will require <br />the storage of 11670 cy of topsoil, using an average stripping depth of 7 inches. Since the south <br />berm will remain intact with a volume of 7800 cy, an excess storage area east of the drainage must <br />• be utilized. This area is also shown on Map Exhibit C-2 and will handle a volume of 3870 cy. <br />[f additional depth of valuable soil is encountered during stripping, the excess storage piles will be <br />increased in size. All topsoil will be excavated and placed to minimize compaction and in no case <br />will the stockpile or berm height exceed 10 feet. All piles will be immediately broadcast seeded <br />with a mixture of smooth brome, western wheat and crested wheatgrass in equal proportions at a <br />rate of 19 pls/acre. <br />Small berms of 18" height of soil will be placed around the excess piles and the downstream side of <br />the south berm so that no soil is eroded into the pit area and no pit runoff is allowed to encounter <br />the stockpiled soil. <br />• <br />Carol Ann Pemut CDMG Application 22 <br />