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NTUCSON SOUTH PROPOSED GRAVEL MINE STABILITY ANALYSIS <br /> TETRA TECH SLOPE STABILITY ANALYSIS - WEST SIDE TUCSON STREET <br /> Color Name Model Unit Cohesion' Phi' Piezometric <br /> Weight (Psf) (") Line <br /> (PcQ <br /> Claystone Bedrock Mohr-Coulomb 134 100 28 1 <br /> (peak strength) <br /> ■ Fill Mohr-Coulomb 126 25 26 , <br /> Mud Lens Mohr-Coulomb 126 50 28 1 <br /> Overburden Mohr-Coulomb 126 50 28 1 <br /> Sand and Gravel Mohr-Coulomb 137 0 35 1 <br /> ■ Slurry Wall Mohr-Coulomb 122 0 0 1 <br /> ■ Weathered Mohr-Coulomb 134 0 ,a , Easement/Utilities <br /> Claystone Bedrock <br /> (residual strength) <br /> h13ft <br /> 1.4 44 ft <br /> 4,977 <br /> 4,967 <br /> 1.34 �--24ft�2o 500 PSF applied live load <br /> � <br /> 4,957 <br /> 4,947 <br /> 4,937 - - - - -, <br /> 4,9270V. <br /> 2 <br /> 4,917 <br /> 4,907 <br /> 4,897 <br /> 4,887 <br /> -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 <br /> Distance (ft) <br /> Figure A-2 - Pseudostatic Analysis with Low Phreatic Surface <br /> Horizontal Acceleration Coefficient: 0.067g <br />