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4.26 <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: 900 <br /> ! i Intermediate Bench Width: 30 ft <br /> 7,300 l Material Properties: <br /> y = 164 pcf <br /> c' = 900 psi = 129,600 psf <br /> 0 7,100 ( I I cp' = 20' <br /> ao <br /> 1 <br /> > 6,900 <br /> Z i I III I i <br /> +-' 6,700 <br /> —° <br /> — 6,500 - <br /> > <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 7 <br /> 1.The Factor of Safety(FS)value shown is for the k <br /> critical failure surface. South Quarry nty, C 11Proposed Benching <br /> Jefferson County, CO (/�_�+ Stability Results <br /> VE I nts <br /> Aggregate Industries June 2017 Figure B-7 <br />