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RECEIVED <br /> SEP 0 2 2025 <br /> Colorado Division of Reclamation, <br /> Mining and Saftey <br /> EXHIBIT G WATER INFORMATION <br /> 1 . General <br /> The site located on an upper dry terrace above the Yampa River. It is well above the highwater <br /> mark and outside the riparian zone of the river. The disturbed area of the permit will be within <br /> existing dry fields and access roads. The access road that separates the phases is immediately <br /> east of an ephemeral drainage that leads to a small historic stock pond. No other significant <br /> water features are present on the site. Water used for dust mitigation is trucked in from legal <br /> sources. <br /> 2. Water Quality Protection <br /> The primary concerns surrounding water quality protection at the site are the potential impacts <br /> to the surface and groundwater from sediment, hydraulic fluids, and diesel fuel. Sediment will be <br /> controlled through the use of stormwater retention berms within the disturbance area throughout <br /> the life of the mine. The site will be graded in a manner that maintains all surficial flows within <br /> the disturbed area, in turn containing all sediment and unwanted discharges from leaving the <br /> site. Hydraulic fluids and diesel fuels will be contained within vehicles or with adequate storage <br /> methods that follow best practices of maintenance. These practices including regular <br /> inspections of vehicles, hydraulic lines, and any other potential spill sources. Diesel fuel will be <br /> stored on-site in portable double walled tanks with secondary containment. Fuel storage will be <br /> stored away from unexpected exposed groundwater and other waterways. Spill kits will be <br /> located near all fueling areas to clean up inadvertent spills as soon as possible. An SPCC plan <br /> will be in place to prevent oil discharges and establish a response procedure in the event of <br /> spills. <br /> Any surface water discharges from the site will be sampled in accordance with their CDPHE <br /> discharge permit. All discharges will be via the approved outfall; proposed location shown on <br /> Map C-3. <br /> Yampa Valley Gravel Pit <br /> August 2025 G-1 Lewicki&Associates <br />