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Cripple Creek & Victor Gold Mine <br />Valley Leach Facility Expansions <br />Detailed Design for Permitting <br />NewFields Project No. 475.0106.064 <br />September 2025 <br /> <br /> <br /> <br />Page 21 <br />Table 5.2 – Calculated Minimum Factors of Safety <br />Section Area Condition Factor of Safety (Note 1) <br />A VLF2 Phase 4 <br />Static 1.4 <br />Pseudostatic 1.2 <br />B VLF2 Phase 4 & 6 <br />Static 1.8 <br />Pseudostatic 1.5 <br />C VLF2 Phase 4 <br />Static 1.7 <br />Pseudostatic 1.4 <br />D VLF2 Phase 6 <br />Static 1.8 <br />Pseudostatic 1.4 <br />E VLF2 Phase 6 <br />Static 2.2 <br />Pseudostatic 1.8 <br />Notes: 1. The GLE/Morgenstern-Price and Spencer methods were used to <br /> determine the minimum factors of safety. The presented factors of <br /> safety are the minimum factors of safety calculated by either method. <br /> <br />Results indicate that the VLF Expansion slopes achieve the prescriptive requirements from DRMS <br />and Newmont and will remain stable under static and pseudostatic loading conditions. <br />5.2. Settlement Evaluation <br />The VLF Expansion increases the ore stack height on the existing VLF2 facility and partially fills <br />the interior basin of the VLF1 facility extending the footprint up the valley slope. Additionally, the <br />proposed Elkton pit, located under the VLF 2 Phase 4 Expansion, will be backfilled. Differential <br />settlement is expected to occur due to variable fill thickness and foundation transitions from <br />intact bedrock to pit backfill. The evaluation was completed to estimate long-term settlement at <br />critical sections and assess if the estimated strain, caused by settlement along the base of the <br />facility, could compromise the integrity of the LLDPE liner. In addition, settlement of the VLF1 <br />slopes surrounding the proposed PSSA was evaluated to ensure potential settlement would not <br />reduce the storage areas capacity. <br />The settlement evaluation was completed using the two-dimensional (2D) finite element stress <br />analysis program RS2 v.11. Considering the nature of the backfill material and lack of <br />groundwater presence, time-rate consolidation is not expected and an elastic approach to <br />estimate deformations was completed.