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4.18 <br /> Configuration: <br /> Bench Height above El. 7000: 40 ft <br /> 7,700 Bench Width above El. 7000: 40 ft <br /> Bench Height below El. 7000: 70 ft <br /> Bench Width below El. 7000: 25 ft <br /> 7,500 Bench Face Angle: 90' <br /> Material Properties: <br /> 7,300 y = 160 pcf <br /> c' = 64.2 psi = 9245 psf <br /> 7,100 V = 21.8° <br /> 00 <br /> 00 <br /> 0 <br /> > 6,900 <br /> Z <br /> 6,700 <br /> C <br /> O <br /> — 6,500 <br /> N <br /> w 6,300 <br /> 6,100 <br /> 5,900 — <br /> 5,700 -- - -- -- <br /> -1,200 -700 -200 300 800 1,300 1,800 2,300 <br /> Horizontal Distance (ft) <br /> Notes: Morrison Quarry Case 11 <br /> 1. The Factor of Safety(FS)value shorn is for the <br /> critical failure surface. South Quarry County, <br /> CO11Lt <br /> Jefferson County, C Proposed Benching <br /> Stability Results <br /> GEI Consultants <br /> Aggregate Industries June 2017 Figure B-10 <br />