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