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TUCSON SOUTH PROPOSED GRAVEL MINE STABILITY ANALYSIS <br /> SLOPE STABILITY ANALYSIS - CHALLENGER PIT <br /> TETRA TECH (pcfl (psfl (0) <br /> Claystone Bedrock Mohr-Coulomb 134 100 28 <br /> (peak strength) <br /> Mud Lens Mohr-Coulomb 126 50 28 <br /> ■ Overburden Mohr-Coulomb 126 50 28 <br /> ■ Reclamation Slope Mohr-Coulomb 126 25 26 <br /> Fill <br /> Sand and Gravel Mohr-Coulomb 137 0 35 <br /> ■ Slurry Wall Mohr-Coulomb 122 0 0 <br /> ■ Weathered Mohr-Coulomb 134 0 14 <br /> Claystone Bedrock <br /> (residual strength) <br /> Challenger Pit <br /> Reclaimed Slope <br /> 1.52 �4—45 ft <br /> Utility Easements <br /> 30 �_ Waterline <br /> 4,963 <br /> 4,953 <br /> 4,943 ---------- - - ---3-------- <br /> --- <br /> 4,933 - 1 <br /> 4,923 <br /> 4,913 <br /> 4- 4,903 <br /> 4,893 <br /> 2 4,883 <br /> 4,873 g <br /> 4,863 <br /> 4,853 ' <br /> 4,843 <br /> 4,833 <br /> -90 -70 -50 -30 -10 10 30 50 70 90 110 130 150 170 190 210 230 250 270 290 310 330 350 370 390 410 430 <br /> Distance (ft) <br /> Figure L2 - Pseudostatic Analysis <br /> Horizontal Acceleration Coefficient:0.067g <br />