2025 06 18 WEH Slope Stability Analysis Letter Report

Color Color Name Unit Weight (pcf) Name Unit Weight (pcf) Bedrock 660 180 Effective Cohesion (psf) Effective Cohesion (psf) Decomposed Bedrock 180 135 Rock/Very Dense Decomposed 135 0 Granular Soil 0 Medium sand 0 Rock/Very Dense Granular Soil Medium sand Retaining Wall 120 120 Effective Friction Angle (°) Effective Friction Angle (°) UCS Intact (psf) Intact Rock Parameter mi UCS Intact (psf) Intact Rock Parameter mi Geological Strength Index GSI Disturbance Factor D 17 65 1 38323,263 323,263 17 Geological Strength Index GSI 0 150 Topsoil Topsoil 115 115 0 1 1 1 1 38 1 32 1 32 1 1 1 0 30 640 Piezometric Surface Piezometric Surface 65 150 Retaining Wall Disturbance Factor D 30 1 1 1.589 620 NLB-2 NTP-1 Critical Failure Surface (CFS) 600 Factor of Safety: 1.589 Current Slip Surface Number: 401 NTP-2 NLB-1 Property Line Elevation 580 560 540 520 500 480 460 440 0 100 200 Distance Cross Section D_Proposed Condition Cr 300 400