2021-12-29_PERMIT FILE - M2021009 (6)

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EXHIBIT G WATER INFORMATION 6.4.7(1) and 6.4.7(2) Surface Water The northern extent of the site, the WRL area, is within 300 feet of North Clear Creek. Russell Gulch runs sub-parallel to the northern extent of the site. The Clear Creek County parcels of the site are well outside of FEMA identified floodplains while the Gilpin County parcels do not have available digital data. No wetlands are identified or anticipated within the site; please refer to the Aquatic Resource Delineation included as Appendix 7 for additional information regarding wetlands. No aquifers will be impacted by the operation. Maps C-1 and G-1 show surface water information for the pre- mine conditions of the area. Protection of the prevailing hydrologic balance with regard to surface water is achieved by: • Ensuring that offsite discharge is the same or less following mining; • Ensuring that offsite discharge velocity is equal or less than pre-mine; OR • Ensuring that offsite discharge velocity for new discharge paths is non-erosive (<5 fps). In conjunction with these goals, water quality is ensured during mining by complying with required CDPHE discharge permits. Finally, protecting the prevailing hydrologic balance means ensuring that no area water rights are injured through runoff diversion. The water handling plans for the Young Ranch Resource Quarry have all been designed to accomplish these goals. Pre-mining Surface Hydrology Surface flows that do not occur within the active mining area will be diverted around the disturbed area via>2-foot-tall isolation berms and will infiltrate into the native soils of the undisturbed areas of the site within 72 hours. Designated sumps are shown on Maps C-2 through C-7 that indicate where stormwater will accumulate, as required. Map G-1 shows the approximate direction of drainage throughout the site prior to mining, during mining, and post- Young Ranch Resource December 2021 G-1 Lewicki&Associates