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4.58 <br /> 0 Configuration: <br /> Bench Height above El. 7000: 40 ft <br /> 7,700 <br /> 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 <br /> Bench ace Angle: 900 <br /> Stability Bench at El. 6650 <br /> Stability Bench Width: 100ft <br /> 7,300 <br /> Material Properties: <br /> M� <br /> y = 164 pcf <br /> P <br /> 7,100 <br /> c' = 900 psi = 129600 psf <br /> 00 <br /> 00 L 200 <br /> 6 41_k, <br /> > 6,900 <br /> T <br /> V, <br /> z <br /> J <br /> 6,700 <br /> 0 <br /> 6,500 <br /> CU <br /> (U <br /> LU 6,300 k <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- <br /> 1. The Factor of Safety(FS)value shown is for the Morrison Quarry Case 13 <br /> critical failure surface. South Quarry Highwall Proposed Benching <br /> Jefferson County, CO E I Consultants Stability Results <br /> Aggregate Industries June 2017 Figure B-1 3 <br />