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C~ ESPEY, HUSTON & ASSOCIATES, INC. <br />• During the regrading, most of the material will be pushed more or less <br />straight upslope. The bulldozer cleat mazks will end up on the contour and will be <br />important in retarding surface erosion. Surface relief will be 2 to 4 inches to ensure <br />good adhesion of subsequently applied topsoil. In the unlikely event that residual <br />roughness and cleat marks are not sufficient to produce 2 to 4 inches of surface <br />relief, the slopes will be ripped. The packing action of the bulldozer tracks during <br />regrading is expected to adequately compact the regraded material. <br />The regrading process will also result in elimination of the cut above the <br />mine bench. The facilities azea below the mine bench will be regraded as necessary <br />to achieve the original contours which will be almost unchanged by construction and <br />operation. Drainage through the area will be unimpeded after facility removal and <br />regrading. <br />In azeas where no grading to reestablish contours is necessary, such as <br />the equipment storage area and much of the haul road, the compacted surface will <br />be ripped, to improve permeability, before topsoil is applied. <br />the backfilling and grading at the Northern #1 Mine was completed <br />by Auqust, 1986. All work was completed as designed The channel <br />was completed without problems and developed significant <br />vegetation wihin 2 weeks after allowing the water to enter. The <br />design for the channel is given in the following section. <br />A professional land surveyor's post mining topography map is <br />included in Exhibit M-3 of this section. <br /> <br /> <br />