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• <br />• <br />• <br />2.0 SITE CONDITIONS <br />2.1 TOPOGRAPHY <br />The site is located on a steep slope of the north <br />side of the valley of the North Fork of the Gunnison P.iver. <br />A series of benches have been constructed b;T devel_oping cuts <br />into the colluvial soils and bedrock and using this material <br />to construct fills, as shown on Plate 2. The existing mine <br />facilities are located on these benches. The fills have <br />generally been constructed at their angle of repose, so fill <br />slopes are typically steep, on the order of 35°. <br />The natural slopes which extend above the uppermost <br />(fan level) fill are steep, typically on the order of 1 (ver- <br />tical.) 2 (horizontal.) <br />Below the lowermost (crushing and screening level) <br />fill, the natural slopes flatten to form a more gently slop- <br />ing bench on which it is proposed to locate a waste rock pile. <br />Slopes in this area are typically on the order of 1 (v) <br />5 (h). <br />2.~ GEOLOGY <br />The bedrock at the site consists of Upper Cretaceous <br />hle:~a Verde Formation above an elevation of approximately <br />6,f375 feet and Upper Cretaceous Afancos Shale below this elev- <br />ation. <br />The Dlesa Verde Formation consists of shales, silt- <br />stones, and sandstones with interbedded coal. Some of the <br />more resistant units are cliff forming. The Pfancos Shale is <br />a thick sequence of marine sediments which typically forms <br />- 5 - <br />GEOl/YDRO CONSULTING, INC. <br />