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During Phases 1-3, the WRL will have two areas, a western and eastern area which fill two <br /> respective low-lying areas (Maps C-3 through C-5). During Phase 4, the two areas of the WRL <br /> will be merged to one combined WRL (Map C-6 and C-7). Both WRLs will be constructed from <br /> excess waste fines and overlying weathered rock encountered during pre-mining stripping. The <br /> western WRL will be created first and a road will be created down to the first lift at the base of <br /> the WRL. Following creation of the road, the first lift, and each subsequent WRL lift, will be <br /> created in 50-foot steps that will be reclaimed to a 2.2H:LOV slope as the lift is completed. <br /> Regardless of area and throughout the mine life, the WRL is designed with 2.2H:LOV slopes, see <br /> Maps C-3 through C-7 and F-1; Figure 5; and Rule 6.5 —Geotechnical Stability Exhibit for <br /> additional design details. Stormwater drainage and further designs of the WRL are included in <br /> Exhibit G. <br /> Designed reclaimed slopes of 2.OH:LOV will remain constant across the mine. The 2.OH:LOV <br /> finished slopes will preserve the ridgeline and slope topography similar to pre-mine conditions. <br /> All post-mining slopes will mimic the natural landforms surrounding the mine area thereby <br /> allowing the reclaimed mine area to blend naturally with the existing pre-mine landforms. <br /> 6.4.4(c) <br /> The Phase 1 processing area will be gently sloped to the north to control surface stormwater <br /> flows; see map C-3 for sump locations and drainage flow directional arrows. The processing area <br /> will be surfaced with compacted coarse aggregate. It is expected that all surface water that does <br /> not settle near the northern stormwater berm will percolate into underlying groundwater within <br /> 72 hours. In the event that pooled water is observed adjacent to the northern stormwater berm <br /> within 24-hours of the end of a storm event, excess water will be pumped and travel along a pipe <br /> through the CCP underpass, down the WRL drainage slope, and onto the active lift of the WRL <br /> where it will infiltrate into the porous WRL. By using this method, no excess stormwater will <br /> accumulate within the mining area beyond 72 hours; an event that is highly unanticipated and <br /> non-the-less prepared for. Maps C-3 through C-7 detail stormwater berms, sumps, and pumped <br /> water pipe locations for each phase. <br /> As a new mining bench is opened, a safety and stormwater berm will be installed along the upper <br /> crest of the 50-foot-wide bench to collect and direct stormwater from above to dedicated <br /> Young Ranch Resource <br /> December 2021 D-10 0 <br /> Lewicki&Associates <br />