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Mr. Joshua Oliver <br /> June 9,2021 <br /> Page 2 o l`4 <br /> • The unlined slopes of the freshwater and siltation pond are shown on the modified mining plan map as <br /> 1:1,however, the geotechnical stability exhibit provides analysis of 2:1 slopes for all excavations and <br /> only in three locations for the entire site. Please either re-run the stability model to demonstrate adequate <br /> setbacks for the freshwater and siltation pond at a 1:1 slope and at the maximum projected depths, or <br /> modify the mining plan map to reflect 2:1 slopes for these excavations as described in the current stability <br /> exhibit. Please also describe more fully how it was determined that only 3 sections would be needed to <br /> provide adequate stability setback data for all structures within and within 200' of the permit area. <br /> Additional analysis may be required for structures currently shown to be within mining cells as shown. <br /> • None of the monitoring wells are shown on the mining plan map, however, at least one appears to be <br /> within an area to be mined? Please address/describe. <br /> • Please show the locations of the eight permitted wells within 600' of the permit boundary on the provided <br /> structures map if possible, or on a separate map if needed. <br /> EXHIBIT D-Minims Plan(Rule 6.4.4): <br /> • Please address/fully describe the batch plant shown on the mining plan map within the mining plan as <br /> described above. <br /> • DRMS acknowledges the statement provided that all mining will take place at 3:1 slopes and that the <br /> operator will provide a technical revision, including bond revision, if steeper slopes will be utilized during <br /> mining. <br /> • What will be done with the excess overburden from the site that will not be utilized to backfill the <br /> freshwater and siltation ponds? <br /> EXHIBIT E-Reclamation Plan(Rule 6.4.5): <br /> • DRMS acknowledges the provided statements stating that the freshwater and siltation ponds will be fully <br /> backfilled and revegetated for reclamation, and that all excavated cells will be mined to at slope no <br /> steeper than 3:1, H:V thereby eliminating the need to backfill to achieve final reclamation slopes. <br /> • DRMS understands that topsoil will be replaced at a minimum depth of 6"prior to revegetation. <br /> EXHIBIT F-Reclamation Plan Map (Rule 6.4.6): <br /> • DRMS acknowledges the oil/gas structure constrained reclamation configuration provided, and that the <br /> operator will submit Technical Revisions to modify the provided reclamation plan as needed if these <br /> structures are removed at some time in the future. <br /> • Please correct/revise the names of all monitoring wells to match the names used on the provided WL data <br /> spreadsheet provided. <br />