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2 EXECUTIVE SUMMARY <br /> TABLE 2-1 (Continued) <br /> SUMMARY OF IMPACTS AND MITIGATION MEASURES <br /> LEVEL OF <br /> ENVIRONMENTAL IMPACT MITIGATION MEASURES SIGNIFICANCE <br /> AFTER MITIGATION <br /> 4.8.5 Reuse of excavated overburden containing clay and silts No mitigation is required. <br /> combined with equipment compaction of the reclaimed <br /> mine areas could decrease infiltration of surface water <br /> and reduce groundwater recharge from the project site <br /> throughout the life of the project and after reclamation. <br /> This would be a less-than-significant impact. <br /> 4.8.6 Mining out Hospital Creek and constructing a berm to 4.8.6 The applicant shall implement the Mining Plan Option 1 as Significant and <br /> form a large detention basin(Mining Plan Option 2) described in Chapter 3.0,Project Description of this document Unavoidable <br /> would substantially alter the natural hydrology of and shown in Figure 3-3. Mining Plan Option 1 requires the <br /> Hospital Creek. This option would permanently remove applicant to leave Hospital Creek in place,mining both sides <br /> surface water flows from the reach of Hospital Creek with a 100-foot setback from the centerline of the creek to the <br /> downstream of the proposed mining operations leading top of the mining slope. . <br /> to depletion of flows to downstream receiving water <br /> bodies,reduction of surface water available for <br /> localized infiltration,or elimination of adequate water <br /> flow for aquatic and riparian habitats. This would be a <br /> significant and unavoidable impact without mitigation <br /> prescribed as part of this EIR. <br /> 4.8.7 Mining operation would alter the natural,preferential No mitigation is required. <br /> flow pathways of surface water resulting in areas of <br /> localized onsite flooding. This is a less-than-significant <br /> impact. <br /> RMC Pacific Vemahs Quauy Mining and Rectamation Project 2-24 <br /> Adaiinis(m(ive Dmf(EIR Mash 2FSA/h 2000404 <br />