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• <br />United Companies, Inc. <br />March 21, 1994 <br />Page 6 <br /> <br />reservoirs will be created. With only changing the embankment <br />alignment and no reservoir there should be no reason for public <br />access. The roadways are important around the property and in the <br />event a more severe earthquake occurs we would recommend a minimum <br />slope of 2:1 (horizontal to vertical) <br />In conclusion, the overburden soil berm planned around the exterior <br />of the pit during excavation should be held. back from the edge 15 <br />feet or greater to prevent addition loading of.the slope. The 200 <br />foot separation from the telephone line, which is the closest man <br />made structure, is excessive for the relatively shallow excavation, <br />the type excavation, the proposed temporary and permanent cut slope <br />angles, and the relative level grade beyond the cut slope. The <br />telephone line exists in the roadway property and is outside the <br />proposed property. In our opinion the minimum set back from the <br />edge of the excavation to the property line, with the dry slopes <br />should be 30 feet. The 30 foot setback is adequate to prevent any <br />adverse affects to the stability of the existing man-made <br />structures. <br />If you have any questions or need additional information, please <br />feel free to contact us. <br />Sincerely, <br />\\\\\\l 1111 l l l l 1111!/i <br />Western Colorado Testing, Inc. \\~~~~~y~ ;H;`I~!,y <br />~Q,~P~GISTfgF< <br />~ _. <br />~--~/~/ ~t _ . <br />Gary L. Hamacher, P.E. =~~0 1671 <br />Senior Geotechnical Engineer =N~%`~s <br />~ "9T'~'oNa~ Ea <br />GLH ac ,,, F •..,,,,,.,, <br />