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~ • • <br /> Vnited Companies, inc. <br /> ilarCh 21, 1994 <br /> Page 6 <br />' reservoirs will be created. with only changing the embankment <br /> alignment and no reservoir there should ba no reason for pu611c <br /> access. Tha roadways are important mound the property and in the <br /> event a more severe earthquake occurs ve would recommend a minimum <br />' slope o! 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 />' teat or greater to prevent addition loading ot. the slope. The 200 <br />Poot separation from the telephone line, which is the closest man <br />made structure, is excessive !or the relatively shallow excavation, <br />the type excavation, the proposed temporary and petmanant cut slope <br />angles, and the relative level grade beyond the cut elope. The <br />' telephone line exists in the roadway property and is outside the <br />proposed property. in out opinion the minimum set back from the <br />' edge of the excavation to the property line, with the dzy slopes <br />should be 30 feet. The 30 Poot 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 tree to contact us. <br /> Sincerely, <br />' isetsrn Colorado Teatiaq, lnc. <br /> ~a~ <br />' Gary L. Hamacher, P.S. <br /> Senior Geotechnical Snginaer <br />' GLH/ac <br /> <br /> <br />1 <br />Colons Pit November 06 5-10 <br />