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Jan 29 08 11:04a Greg Lewicki and Associat 3033466934 p.3 <br />stockpiling will take place on the existing pit bottom, which is 40-80 feet lower than the <br />surrounding terrain, thus maintaining the low visibility and noise of these existing activities <br />Topsoil/Overburden Handling <br />As of the start of 2007, all topsoil and overburden has been stripped from the mining area on the <br />existing flat terrace. This area is approximately 47 acres. Subsoil in this area was thin and. was <br />combined with the topsoil. The berm around the west and north sides of the existing pit contains <br />this topsoil/subsoil. The average height is 8 feet, with 3H:1 V sideslopes and 16-20 feet wide at <br />the top, and is approximately 5000 feet long. The volume of the stockpile is approximately <br />65,800 cubic yards and utilizes approximately 6.0 acres. These are AutoCAD calculated and <br />Elam provided dimensions. The mining area which was stripped is approximately 45.4 acres. <br />Topsoil was also stripped from the employee housing area and placed in a berm around the area <br />itself. This area of 2.8 acres disturbance produced a volume of topsoil/subsoil of approximately <br />7000 cubic yards. <br />Given a total stockpile volume of 65,800 cy + 7,000 cy = 72,800 cy, and a total strip area of 2.8 <br />acres + 45.4 acres = 48.2 acres, the average strip depth was 0.54 feet. <br />In the expansion area, the natural slopes have only 6" to 1' of topsoil. The flatter top of the hill <br />has up to 14' of overburden below the 1' of topsoil, but this area is relatively small: <br />approximately 1.3 acres. The slope area to be mined is approximately 14.7 acres. Based on these <br />figures, the amount of topsoil and overburden to be recovered in the expansion area is <br />Flat area overburden: 1.3 acres x 14' depth = 29,360 cy <br />Slope area and flat area topsoil: 16.0 acres x 1' depth = 25,813 cy <br />The overburden will be placed in the old areas of the pit, similar to the imported material. This <br />material has historically been placed on the north side of the pit. <br />Prior to any mining taking place in the expansion area, two topsoil berms will be created in order <br />to create a visual and audio screen in areas of special concern. The first berm will be built along <br />Vagneur Pit June 07 D-3