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<br />United Compnaies, Inc. <br />February 15, 1994 <br />page 6 <br />In conclusion, the overburden soil berm planned around the exterior <br />of the pit during excavation should be held back from the edge 12 <br />feet or greater to prevent addition loading of the slope. The 200 <br />foot separation from the electric line is excessive for the <br />relatively shallow excavation, the type excavation, the proposed <br />temporary and permanent cut slope angles, and the relative level <br />grade beyond the cut slope. In our opinion the minimum set back <br />from the edge of the excavation to the electric line or pro erty <br />line, which ever is nearer the embankment edge, should 40 feet. <br />The 40 foot setback is adequate to prevent any adverse affects to <br />the stability of the existing man-made structure. Should the <br />electric line be moved to the opposite side of the roadway the <br />minimum distance can be decreased to 30 feet. <br />If you have any questions or need additional information, please <br />feel free to contact us. <br />Sincerely, <br />W`es~terayCOl~or/ado Testing, Inc. <br />. E E9 •.;5' <br />3V.e F F <br />Gary L. Hamacher, P.E. ~ oS~+ <br />Senior Geotechnical Engineer ~* n 16710 s. <br />GLH/rr U„° „s~ <br />COL <br /> <br />.. - .. _. .... . ,..., x_ .. .._ ._ _, _._... <br />