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1 <br /> COP~CLUSiONS AND RECCOMENDATIONS <br />' 1. The materials available onsite appear to be suitable for construction of the <br />proposed earth embankment <br /> . <br />' 2. The minimum safety factor calculated for the mining conditions adjacent to "O" <br />Street is 1.26 which exceeds the minimum requirement of 1.25. Also, the critical <br /> failure surface does not intersect the existing structures. The proposed 75' <br />' setback is adequate. <br /> 3. The safety factor calculated for the mining conditions adjacent to 71s` and 83~a <br /> Ave is 1.57 which exceeds the minimum requirement of 1.25. Also, the critical <br />' failure surface does not intersect the existing structures. The proposed 40' <br /> setback is adequate. <br />' 4. The safety factor, against sliding, calculated for the mining conditions adjacent to <br /> Cache La Poudre River is 1.57 which exceeds the minimum requirement of 1.25. <br /> Also, the critical failure surface does not intersect the river. The proposed 100 <br /> setback is adequate. <br />' S. The minimum safety factor calculated for the mining conditions adjacent to the <br />existing private homes is 1.26 which exceeds the minimum requirement of 1.25. <br />Also, the critical failure surface does not intersect the existing homes. The <br />' proposed 100' setback is adequate. <br />6. The minimum safety factor calculated for the mining conditions adjacent to the <br />' existing water tanks is 1.26 which exceeds the minimum requirement of 1.25. <br />Also, the critical failure surface does not intersect the existing structures. The <br />proposed 100' setback is adequate. <br />7. The minimum safety factor calculated for [he mining conditions adjacent to the <br />existing utility lines is 1.57 which exceeds the minimum requirement of 1.25 <br />' Also, the critical failure surface does not intersect the existing structures. The <br />proposed 30' setback is adequate. <br />' 8. The safety factor calculated for [he reclaimed embankment is 1.7which exceeds <br />the minimum requirement of 1.5. <br />9. These safety factors are based on obtaining a saturated cohesion of 200 psf for the <br />soil in the embankment. Based on results of direct shear tests on s-'rn~Tar soils a <br />700 psf cohesion value was obtained. The 200 psf value was selected as a <br />' conservative value for the purposes of analysis. <br /> <br />1 <br /> <br />