Supporting Technical Assessments

PSTEQ SP Zone D2 PSTEQ Paleo Bldr Allu. PSTEQ VW Ign. PSTEQ EW/VW Rhy. EW Ign&Dac PSTEQ VW Ign. PSTEQ Paleo Bldr Allu. PSTEQ VW Dacite PSTEQW Dacite PSTEQ Epiclastic PSTEQ EW/VW Rhy. EW Ign&Dac PSTEQW Rhy Rock PSTEQ Zone F PSTEQ Zone A/I Fdtn UC PSTEQ Zone A/I Mine OB PSTEQ EW/VW Rhy. EW Ign&Dac PSTEQ Ash/CWRock/Resid.S PSTEQ Ash/CWRock/Resid.S PSTEQ Zone G PSTEQ EW/VW Rhy. EW Ign&Dac PSTEQ SP Zone D3 PSTEQ Zone A/I Fdtn UC PSTEQ EW/VW Rhy. EW Ign&Dac PSTEQ Ash/CWRock/Resid.S PSTEQ Zone G PSTEQ SP Zone E PSTEQ Zone A/I Fdtn UC PSTEQ SP Zone D2 PSTEQ SP Zone E PSTEQ SP Zone D2 PSTEQ SP Zone D2 PSTEQ SP Zone D3 PSTEQ SP Zone D3 PSTEQ SP Zone D3 PSTEQ SP Zone D2 PSTEQ SP Zone D2 PSTEQ SP Zone D3 PSTEQ SP Zone D3 PSTEQ SP Zone D3 PSTEQ SP Zone D2 PSTEQ SP Zone D2 PSTEQ SP Zone D3 Distance 0 100 200 300 400 500 600 700 800 900 1,000 Elevation 30 50 70 90 110 130 150 170 190 Color Name Model Unit Weight (kN/m³) Cohesion (kPa) Strength Function Efective Cohesion (kPa) Efective Friction Angle(°) Phi-B (°) Minimum Strength (kPa) Tau/Si gma Ratio Piezometric Line Ru Include Ruin PWP PSTEQ Ash/CWRock/Resid.S SHANSEP 17 0 0.23 1 No PSTEQEpiclastic Mohr-Coulomb 18 5 35 0 1 No PSTEQEW/VWRhy. EWIgn&Dac Shear/NormalFn. 17.5 EW/VW Rhy.EWIgn. Dac. 0 1 No PSTEQPaleoBldrAlu. Mohr-Coulomb 18 5 35 0 1 No PSTEQSPZoneD2 Shear/NormalFn. 19.5 Grav./Cobb. Dr=0.85 (16%ile) 0 1 0.05 Yes PSTEQSPZoneD3 Mohr-Coulomb 19 8 15 0 1 0.4 Yes PSTEQSPZoneE SHANSEP 19 0 0.06 1 0.6 Yes PSTEQVWDacite Shear/NormalFn. 18 VWDacite 0 1 No PSTEQVWIgn. Shear/NormalFn. 19 VWIgn. 0 1 No PSTEQWDacite Shear/NormalFn. 25 WeakRhy. Dac. 0 1 No PSTEQWRhyRock Shear/NormalFn. 18.5 WeakRhy. Dac. 0 1 No PSTEQZoneA/IFdtn UC SHANSEP 17.5 50 28 1 0.3 Yes PSTEQZoneA/IMine OB SHANSEP 20.5 120 0.32 1 0.1 Yes PSTEQZoneF Shear/NormalFn. 20.5 Grav./Cobb. Dr=0.85 (16%ile) 0 1 0.05 Yes PSTEQZoneG Undrained(Phi=0) 20.5 80 1 No 20.482 m 20.372 m 50.237 m 59.03 m 136.7 m 9.8897 m 13/10/2021 Section 1d.gsz Figure B13a West Slope PSTEQ 1:4,000 By: ET Analysis Settings Method: Morgenstern-Price Direction of movement: Left to Right Slip Surface Option: Entry and Exit Unit Weight of Water: 9.807 kN/m³ Horz Seismic Coef.: Color Name Model Unit Weight (kN/m³) Cohesion (kPa) Strength Function Effective Cohesion (kPa) Effective Friction Angle (°) Minimum Strength (kPa) Tau/Sigma Ratio Piezometric Line Ru Include Ru in PWP PSTEQ Ash/CWRock/Resid.S SHANSEP 17 0 0.23 1 No PSTEQ Epiclastic Mohr-Coulomb 18 5 35 1 No PSTEQ EW/VW Rhy. EW Ign&Dac Shear/Normal Fn. 17.5 EW/VW Rhy. EW Ign. Dac. 1 No PSTEQ Paleo Bldr Allu. Mohr-Coulomb 18 5 35 1 No PSTEQ SP Zone D2 Shear/Normal Fn. 19.5 Grav./Cobb. Dr=0.85 (16%ile) 1 0.05 Yes PSTEQ SP Zone D3 Mohr-Coulomb 19 8 15 1 0.4 Yes PSTEQ SP Zone E SHANSEP 19 0 0.06 1 0.6 Yes PSTEQ VW Dacite Shear/Normal Fn. 18 VW Dacite 1 No PSTEQ VW Ign. Shear/Normal Fn. 19 VW Ign. 1 No PSTEQ W Dacite Shear/Normal Fn. 25 Weak Rhy. ac. 1 No PSTEQ W Rhy Rock Shear/Normal Fn. 18.5 Weak Rhy. Dac. 1 No PSTEQ Zone A/I Fdtn UC SHANSEP 17.5 50 28 1 0.3 Yes PSTEQ Zone A/I Mine OB SHANSEP 20.5 120 0.32 1 0.1 Yes PSTEQ Zone F Shear/Normal Fn. 20.5 Grav./Cobb. Dr=0.85 (16%ile) 1 0.05 Yes PSTEQ Zone G Undrained (Phi=0) 20.5 80 1 No

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