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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 24 <br />expanded stack has on the overall facility. The maximum settlements for the PSSA facility range <br />from 8 to 10 inches on the slopes of the facility. This amount of deformation will not negatively <br />influence the operation or design of the facility. Results of the settlement and strain evaluations <br />are provided in Appendix E. <br />6. WATER BALANCE <br />6.1. General <br />A Water Balance model was used to determine design requirements for various aspects of the <br />VLF 1 and 2 Expansions. The Water Balance completed is detailed below in Section 6.2. <br />Further information regarding the water balance, including detailed descriptions of calculations, <br />can be found in Appendix F. <br /> <br />6.2. System Analysisfeasibility <br />As part of the VLF Expansions, an updated Water Balance model was developed with the intent <br />that mine personnel would be able to input data and make model runs to predict future <br />conditions and include the impact as a result of the future expansions. <br />Simulations were completed by Piteau Associates using the existing CC&V site-wide water <br />balance model (version 1.7.0), developed with GoldSim. This software facilitates stochastic <br />analysis and allows the user to evaluate a range of potential outcomes when evaluating the <br />adequacy of the system and running scenarios that assist with operating decisions. <br />Using the results from the water balance, the model provided a storage capacity requirement for <br />the VLF1 Phase 6 PSSA. <br />6.2.1. System Inflow Evaluation <br />The CC&V water balance model has been constructed with stochastic generators for <br />meteorological inputs. These comprise precipitation, pan evaporation and, due to the potential <br />for snow and freezing conditions, relative humidity, and temperature. <br />The hydrology modules of the water balance model are used to simulate surface processes and <br />upper surface (‘soil’) moisture for the VLFs. These are used to determine the presence and <br />thickness of snow, snow melt, sublimation, evaporation, runoff, and resultant infiltration to the <br />VLF under both irrigated and non-irrigated conditions.