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CIVIL 12FS"1I1;RCFS <br /> Groundwater Mounding and Shadow Model Report <br /> This TR also submits a groundwater mounding and shadow model report that was performed by CR for the Monarch <br /> DENM Site. The report includes model runs for different stages of mine life and includes the permitted Red Tierra Mine <br /> across CO-60 from the Monarch DENM Site. The model used a cutoff of three (3)feet of rise from the baseline model to <br /> initiate mitigation measures. Utilizing the Red Tierra phasing that was submitted to the Division, it was recommended <br /> that the Monarch DENM Mine should install an underdrain south of Cell 3 prior to the construction of Cell 3 slurry wall. <br /> We appreciate your review. Should you have any questions, please contact us. <br /> Sincerely, <br /> CIVIL RESOURCES, LLC. <br /> Cc: Eric Leigh <br /> Attachments: <br /> Groundwater Monitoring and Analysis Plan <br /> Gilcrest Area Alluvial Groundwater Model <br /> Q 12024 Water Quality Analysis Results <br /> J:\Quikrete-282\Monarch DENM\DRMS\TR-01\TR01 Letter-DRAFT.doc <br />