2025-03-03_PERMIT FILE - M2024056 (2)

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7.2. Groundwater — Reclamation Permanent water storage reservoirs will be left behind, as can be seen on Map F-1. There will be no groundwater consumptive use in reclamation. 7.3. Groundwater — Slurry Wall Impact The installation of a slurry wall within the alluvial aquifer of the South Platte River creates two main potential impacts to the aquifer: the creation of local groundwater shadows or mounding that damage neighboring structures or property and the potential exacerbation of regional groundwater impacts. These impacts however are anticipated to be very localized and not impact nearby wells. Additionally, a french drain will be constructed up-gradient of the slurry walls to control groundwater mounding. The drain will direct abnormally high water to an infiltration gallery in the permit area that will return the water to the groundwater aquifer and river. 8. Water Related Permits The operator is applying for all necessary permits that have not already been acquired for water handling at the Evans Mining Resource. This includes a discharge permit with the Colorado Department of Public Health and Environment and a gravel well permit with the Colorado Division of Water Resources. 9. Water Consumption and Source Water for dust control will be the primary consumptive use at the Evans Mining Resource site. Water will be sourced from ponds in the processing area for processing and aggregate washing purposes. Additional water may be sourced from a groundwater well. The proper permits (gravel well permit, groundwater well permit, augmentation plan) will be acquired prior to construction and use of water from these sources. Water may also be bought from a local source and transported to the site. No ongoing water consumptive use exists in reclamation, since the water storage pod is lined. Table G-5 summarizes the estimated water consumption for the operation throughout the year. Evans Mining Resource February 2025 G'8 Lewicki&Associates