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Table 7. WRL Discharge Comparison. <br /> Pre-Mine Discharge Post Mine Discharge <br /> Velocity(fps) Velocity(fps) <br /> Outfa II 001-A 12.0 11.0 <br /> Outfal 1002-A 17.7 5.60 <br /> Overall slope stability is addressed in the Geotechnical Stability Exhibit. <br /> After Reclamation <br /> Reclaimed conditions include revegetation across the entire site that will create the same <br /> conditions as baseline pre-mining vegetation. Within the quarry area, due to the changes of <br /> slopes and grades, surface water runoff will infiltrate into the reclaimed area when precipitation <br /> falls above the reclaimed area and will further encourage revegetative success within reclaimed <br /> areas. The WRL will be built to achieve final grade and revegetation over time, creating a final <br /> condition of coarse blasted rock topped slopes with trees (Figure 1). The curve number for all <br /> reclaimed areas is assumed to be no greater than that of baseline conditions. The lack of <br /> compaction of material beyond that provided by tracked equipment during slope grading in <br /> reclamation within either the WRL or the quarry area will lead to greater infiltration of surface <br /> water runoff than baseline conditions. However,the curve number is assumed to be 70 or 79, as <br /> the baseline condition is, to be conservative within the designs. <br /> The final quarry floor will discharge along the mined ramp to the south from discharge points on <br /> either side, once mining reaches its maximum extents at the completion of Phase 5. On either <br /> side of the central mine access road, the final quarry floor elevation will daylight onto the mine <br /> ramp/central road and allow discharge of surface water to the south. Changes to the topography <br /> within the mining area will increase the drainage basins that discharges to the south via the <br /> quarry floor(Map G-1, Reclaimed Conditions). The quarry floor will act as a natural sump and <br /> discharge control structure due to the size of flat area it encompasses. Stormwater runoff will <br /> collect on each side of the mine ramp and flow slowly out along the mine ramp. Map G-1 details <br /> the discharge points and Appendix 4 has SEDCAD reports detailing the hydraulics. Table 8 <br /> shows the pre mine discharge to the south from this area (Basin 3) and the post mine discharge at <br /> Young Ranch Resource <br /> December <br /> &Associates <br /> 2021 G-7 © <br />