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'~ ~ • <br />United Companies, Inc. <br />March 21, 1994 <br />Page 6 <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 />Western Colorado Teatinq, inc. ~~uuunuu~~ <br />~~``\\\~~PE •i5 FRP <br />Gary L. Hamacher, P.E. * 0 16710 <br />Senior Geotechnical Engineer ~ NSF <br />GLH/ ac _ <,as _ _a <br />CO <br />