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4.61 <br /> 0 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: 30 ft <br /> 7,500 Bench Face Angle: 90' <br /> I , I Stability Bench at El. 6650 <br /> j Stability Bench Width: 50 ft <br /> 7,300 f <br /> Material Properties: <br /> y = 164 pcf <br /> 7,100 c' = 900 psi = 129600 psf <br /> 00 <br /> j I cp' = 20' <br /> Q 6,900 <br /> i <br /> I <br /> Z <br /> II <br /> 6,700 <br /> o <br /> 6,500 <br /> > <br /> LV 6,300 <br /> 6,100 <br /> 5,900 - <br /> 5,700 — - - --1 — - - - �- -- -- -� -- - - <br /> -1,200 -700 -200 300 800 1,300 1,800 2,300 <br /> Horizontal Distance (ft) <br /> Notes: Morrison Quarry Case 15 <br /> 1.The Factor of Safety(FS)value shown is for the <br /> South Quarry <br /> critical failure surface. Jefferson County, COnt11 <br /> y, C Proposed Benching <br /> Stability Results <br /> GEIConsultants <br /> Aggregate Industries June 2017 Figure B-15 <br />