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4.27 <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: 30 ft <br /> 7,500 Bench Face Angle: 90' <br /> Intermediate Bench Width: 40 ft <br /> 7,300 Material Properties: <br /> y = 164 pcf <br /> c' = 900 psi = 129,600 psf <br /> 7,100 ° <br /> 00 20 <br /> 00 <br /> > 6,900 i <br /> Q <br /> Z 6700 <br /> 0 <br /> M 6,500 <br /> III <br /> N <br /> lJJ 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 5 <br /> South Quarry <br /> 1.The Factor of Safety(FS)value shown is for the �, <br /> critical failure surface. Jefferson County, COnt11 <br /> y, C Proposed Benching <br /> Stability Results <br /> GE1 Consultants <br /> Aggregate Industries June 2017 Figure B-5 <br />