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4.39 <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: 25 ft <br /> 7,500 Bench Face Angle: 90' <br /> Material Properties: <br /> 7,300 IC_ y = 160 pcf <br /> c' = 64.2 psi = 9245 psf <br /> 7,100 cp' = 21.8° <br /> 00 <br /> > 6,900 <br /> Z <br /> v 6,700 -- <br /> C <br /> O <br /> 6,500 <br /> N i <br /> 11J 6,300 <br /> 6,100 <br /> i <br /> 5,9W - <br /> �- - -- <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 14 <br /> 1.The Factor of Safety(FS)value shown is for the �1 <br /> critical failure surface. South Quarry Highwall Proposed Benching <br /> Jefferson County, CO Stability Results <br /> GE I Consultants <br /> Aggregate Industries June 2017 Figure B-12 <br />