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<br /> <br />alterations as demand for materials, that occurs in this area are very <br />• difficult to predict. Castle Concrete Company does believe this is a <br />reasonable estimate. Mining in this area would begin in the area of <br />the Tract A and B boundary and proceed in a southerly direction. <br />The eastern half of Tract B would not be mined. It would <br />only be used for access and topsoil storage. <br />EARTHMOVING - Over most of the operation extractive processes and waste <br />disposal in cuts are the only earth moving processes. In areas where <br />topsoil must be removed (Tracts B and C and small areas near the top of <br />Tract A) the topsoil is stripped with a caterpillar, loaded onto trucks „ <br />and hauled to the topsoil stockpiles for saving. Because of the <br />frequently encountered steep slopes topsoil cannot be saved where the <br />soil is less than about 3 inches deep or slopes are in excess of about <br />• 12° to 18°. Equipment limitations prevent salvage on steeper slopes. <br />Often soils are very thin on slopes in excess of 18° and so very little <br />valuable soil is lost because of equipment limitations. <br />WATER DIVERSIONS AND IMPOUNDMENTS - For the most part this is explained <br />more fully in the Water Resources exhibit. In general most of the runoff <br />is carried to a sediment pond east of the operation in the access <br />corridor. As mining proceeds in Tract C small catchment dams will be <br />built in the stream course to capture and control runoff. <br />Where the small drainages enter Tract A dissipators will be <br />constructed where the drainage enters the quarry. This will produce <br />a sheet flow that can be controlled with contour erosion terraces and <br />ditches in the quarry area. <br />SIZE OF AREA TO BE WORKED AT ANY ONE TIME - As indicated previously <br />• this is highly variable. At any one time probably no more than 2 to 5 <br />acres are being operated for extraction. Although reclamation will <br />P-D-S* <br />