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RECLAMATION - BENCHES <br /> • The No. 1 Mine is known for at least three avalanche paths. The avalanches <br /> considerably increase the erosion potential of the natural ground and the fills <br /> that have been placed within their reach. <br /> Reclamation - Application of Methods <br /> At the base of the cuts, a low buttress will be constructed. <br /> The applicable reclamation concept is that designed for high rock cuts, namely <br /> placement of a buttress along the toe of the cut in order to increase the cut's <br /> long-term stability. <br /> As indicated in the Reclamation description of the permit application, buildings <br /> still remaining at the site on closure of the mine, as well as foundations, will be <br /> utilized in construction of the buttress. The foundations will be rubblized and, <br /> together with the dismantled structures, placed against the toe of each cut, <br /> along the length of the toe, together with any rock and/or soil which has fallen <br /> from the crest of the cut. <br /> Material will then be placed over the rubble, compacted and contoured. Rock <br /> from the crest of each cut will be allowed to fall on the buttress. It is anticipated <br /> that material from reclamation on the fill at the bench will be utilized in <br /> constructing the buttress for the toe. <br /> The dimensions of the buttress will be determined by considerations of stability, <br /> so as to allow a factor of safety of 1.3. <br /> Further disturbance to the crest of the cuts is not contemplated. The height of <br /> the cuts themselves, and the steep natural terrain precludes access to the crest <br /> with any kind of equipment. Further, even if possible, additional disturbance to <br /> the area above the crest of the cut would be destabilizing to the weathered rock <br /> and colluvium of the undisturbed ground there. <br /> Around the perimeter of the benches, the edges will be flattened to a slope of <br /> 1.5:1, or flatter. Material taken from the perimeter of the bench will be used in <br /> construction of the buttress along the cut. <br /> In order to increase the stability of the fill, a berm will be constructed above the <br /> flattened slope around the outside perimeter of the bench. Further back, and <br /> within the flattened area of the bench, a small ditch will be constructed. The <br /> objective is to improve surface drainage so as to prevent surface water from <br /> entering the fill. <br /> The area of the benches will be scarified and seeded with the approved 10,000' <br /> seed mix. <br /> 10 <br />