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Table 5 Comparison of Hydraulic Conductivity Zone Values for the Revised and Original West <br /> Pit Models <br /> Hydraulic Conductivity Description Revised Model Original Model* <br /> Zone (ft/d) (ft/d) <br /> 1 Santa Fe Formation 0.025 0.20 <br /> 2 Precambrian basement 0.0206 0.20 <br /> 3 Alluvium, Downstream 3.35 3.00 <br /> 4 West Pit Backfill 500 1600.00 <br /> 5 Alluvium, Upstream 13.50 15.00 <br /> 6 Green Clay 0.0036 0.0010 <br /> 7 Pink Granite Pit Backfill 250.00 NA <br /> 8 Clayey Alluvium Near Alluvial Window 0.0111 NA <br /> 9 Sandy Alluvium Near Alluvial Window 32.50 NA <br /> 10 Deep Santa Fe and Precambriana 0.025 NA <br /> *-as reported in Engineering Analytics 2019 report <br /> ft/d-feet per day(actually feet 2/day/foot <br /> NA-not applicable,as this zone was not utilized in the original model <br /> a <br /> -combined units represented in Layer 2 of the revised model <br /> Revisions to Modeling Hydraulic Controls, West Pit Engineering Analytics, Inc. <br /> San Luis Project, May 2023 <br />