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Firestone Pit <br /> Geometry Based on preliminary info <br /> Rapid Drawdown Case <br /> Core Weathered Bedrock <br /> Unit Weight: 122 pcf Unit Weight: 126 pcf <br /> c' = 150 psf phi' = 26 ° c' = 0 psf phi' = 24 ° <br /> Shell Bedrock <br /> Unit Weight: 124 pcf Unit Weight: 126 pcf <br /> c' = 100 psf phi' = 30 ° c' = 700 psf phi' = 26 ° <br /> Slope Protection Sand & Gravel <br /> Unit Weight: 124 pcf Unit Weight: 115 pcf <br /> c' = 100psf phi' = 31 c' = 0psf phi' = 34 ° <br /> Factor of Safety - 1 .29 <br /> 4.83 <br /> 1.29 <br /> 4.81 <br /> O <br /> O ---------------------------------------------------------- <br /> T <br /> 4.79 <br /> X <br /> 4.77 <br /> E <br /> C <br /> 0 4.75 <br /> Cz <br /> N <br /> L1J 4.73 <br /> 4.71 <br /> -350 -330 -310 -290 -270 -250 -230 -210 -190 -170 -150 -130 -110 -90 -70 -50 -30 -10 <br /> Distance (feet) <br />