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TUCSON SOUTH PROPOSED GRAVEL MINE STABILITY ANALYSIS <br /> TETRA TECH SLOPE STABILITY ANALYSIS - BRIGHTON DITCH <br /> 1 (Pcfl (tsfl (°) <br /> Cla <br /> Y stone Bedrock I Mohr-Coulomb 134 100 28 <br /> (peak strength) <br /> ■ Fill Mohr-Coulomb 126 25 28 <br /> Overburden Mohr-Coulomb 126 50 28 <br /> Sand and Gravel Mohr-Coulomb 137 0 35 <br /> ■ Slurry Wall Mohr-Coulomb 122 0 0 <br /> Brighton Ditch Affected Land ■ Weathered Mohr-Coulomb 134 0 14 <br /> Boundary Claystone Bedrock <br /> (residual strength) <br /> 4,986 <br /> -4- 18 ft �15 ft 1►I 20 ft ►I 1.93 <br /> � � <br /> 4,976 ` R Mine Slope not feasible.Material must be added for a 3H:1 V slope. <br /> 4,966 <br /> 4,956 \` <br /> .. 4,946 _ <br /> L <br /> 4,936 <br /> = 4,926 <br /> 4,916 <br /> 4,906 <br /> 4,896 -� <br /> 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 <br /> Distance (ft) <br /> Figure G-1 - Static Analysis <br />