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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 /> March 2024 <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 /> 6.2. System Analysis <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. <br /> 111111 <br /> Page 24 <br />