2025 06 18 WEH Slope Stability Analysis Letter Report

Color Proposed Building D.2 Name Unit Weight (pcf) Effective Cohesion (psf) Effective Friction Angle (°) Bedrock 180 Decomposed Rock/Very Dense Granular Soil 135 0 38 Dense to Dense to Very Very Dens Sand Dense Sand 125 0 34 Medium sand 120 0 Top soil 115 0 UCS Intact (psf) Intact Rock Parameter mi Geological Strength Index GSI Disturbance Factor D Piezometric Surface 323,263 17 65 1 1 1 32 Failure surface 30 690 1.676 640 TP-4 TP-14 Factor of Safety: 1.676 Current Slip Surface Number: 271 TP-7 LB-3 12 ft LB-13 590 TP-5 Approximate Projected Location of Existing Building LB-4 540 TP-6 Elevation 490 Critical surface Failure Failure Surface (CFS) 440 390 340 290 240 190 0 100 200 300 400 500 600 700 Distance Cross Section B_Proposed Condition 800 900 1,000 1,100 1,200