2025 06 18 WEH Slope Stability Analysis Letter Report

Color Proposed Building D.1 690 Name Slope Stability Material Model Bedrock Hoek-Brown 180 Decomposed Rock/Very Dense Granular Soil Mohr-Coulomb 135 0 38 Dense to Very Dense Mohr-Coulomb Sand 125 0 34 Medium Dense Sand Mohr-Coulomb 120 0 32 Top Soil 115 0 30 Mohr-Coulomb Unit Weight (pcf) Effective Effective UCS Cohesion Friction Intact (psf) Angle (psf) (°) Intact Geological Disturbance Piezometric Rock Strength Factor D Surface Parameter Index GSI mi 323,263 17 65 1 1 1 3.285 640 Criticalsurface Failure Failure Surface (CFS) TP-8 LB-1 8.2753 ft TP-1 TP-2 590 Factor of Safety: 3.285 Current Slip Surface Number: 221 TP-3 540 LB-2 Approximate location of Existing Building Elevation 490 440 390 340 290 240 190 0 100 200 300 400 500 600 700 Distance Cross Section A_Proposed Condition 800 900 1,000 1,100 1,200