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<br />n <br />U <br />• <br />Referring to Figure 1.1-2, bore holes 1, 2, and 3 were drilled at the <br />lower elevation near the site; while bore holes 4 and 5 were drilled from <br />relatively higher elevations. The surface soil layer at bore hole locations <br />1, 2, and 3 consists of a dense, brown, silty, fine to coarse gravel intermixed <br />with fine to coarse sand. This is non-ore bearing mine waste rock; a granular <br />material which is used for road base. The thickness of the road-ba~;e material <br />ranges from 1 1/2 feet in bore hole #1, to 10 feet in bore hole #2. In bore <br />holes #1 and #3, this road-base material is underlain by loose, broH~n silty, <br />fine to coarse sand with some gravel. In bore hole #2, the road base is under- <br />lain by brown, silty clay with gravel. In all three borings, these underlying <br />materials most likely represent the conditions of the original ground surface. <br />In bore hole #2, the clay layer is 3 1/2 feet thick and is underlain by highly- <br />weathered amphibolite bedrock. In bore holes 1 and 3, the silty sand is <br />underlain by dense, brown, sandy, fine to coarse gravel which grades with <br />cobbles and boulders with increasing depth. <br />The waste rock material, which is situated on the ground surface at <br /> <br />bore hole locations 4 and 5, consists of a dense, gray, sandy, fine to coarse <br />gravel with cobbles. In bore hole 4, the waste material extends to ,i depth <br />of 33 feet; and in bore hole 5, it extends to a depth of 24 1/2 feet. At bore <br />hole 4, the original ground surface (which underlies the waste rock material) <br />consists of a brown, silty, fine to coarse sand. This soil layer is 2 feet <br />thick, and is underlain by a brown, sandy, fine to coarse gravel with cobbles. <br />In bore hole 5, the waste rock material is immediately underlain by <i brown, <br />sandy, fine to coarse gravel which grades with cobbles and boulders. <br />2-2 <br />