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TABLE 3'1: RECLAMATION MAP GUIDE <br /> Gradient of all reclaimed slopes Drawing 11 <br /> Cross-sections of reclaimed slopes Drawing 12 <br /> Where vegetation will not be established and general Drawing 11 (all reclaimed areas would <br /> areas for shrub or tree planting receive the same revegetation treatment) <br /> Shore configuration of ponds and shallow areas if future N/A <br /> land use is for wildlife <br /> Average thickness of replaced intraburden/overburden by Drawings 12 and 13 <br /> reclamation area or phase <br /> Average thickness of replaced growth mediurn by Drawing 12 <br /> reclamation area or phase <br /> 3~1 Drill Hole Plugging <br /> Drilling may occur throughout the active mining phase of the proposed Upper Pit expansion and <br /> East Pit development. Prior to completing additional drilling, American Gypsum vv0u|d develop <br /> drilling plans and obtain required pemnita, including drill hole plugging and reclamation plans. Drill <br /> holes would likely be mined out as the Upper Pit and East Pit are developed-, however, drill holes <br /> would nU|| be plugged to prevent impacts to aquifers (i.e. noixing), impacts to beneficial uses, <br /> UDwnvvard/upwvmrdwater|OSs. surface water flowing into the hole, or an open surface hazard. <br /> Drill holes vvou|U be plugged in 3 manner appropriate to vv8b3r conditions encountered during <br /> dri||ing,according tO procedures outlined in the BLK4 Solid Minerals Reclamation MandboOh(BLK8. <br /> 1992) and Colorado Division Of Water Resources (CO DVVR) Code of Colorado Regulations <br /> (CCR)2 CCR402-2 (CO DVVR. 2018). This would include the fo||ovving� <br /> Removing casing; <br /> |f more than one aquifer was perforated in single drill ho|e, baokfi||in0m/ith a cement grout <br /> plug at the confining layer above aquifers; <br /> Bachfi|\ing unconfined/unC0nso{idated8quifeo8 to the static vvah3r level with drill cuttings, <br /> clean sand, or clean gravel; <br /> If water is not encountered, bonkfi||ingvvith drill cuttings; and <br /> Beckfi||ing the upper 5 feet (minimum) with clean native clay, cement, or high solid <br /> bentonitegn)ut, including adequately compacting fill to prevent settling. <br />� Materials used horbankfi||ing would be d88n. inert, and free from contaminants. <br />� <br /> 3.2 Regrading/Reshaping <br /> The Upper Pit and East Pb would be baokfUed using overburden or intnaburden from open pit <br /> mining activities. BaokfiU material would be regraded bo2.5H:1V slopes orshallower,covered with <br /> Q to 12 inches of growth medium, and track-walked using o dozer or similar equipment b} aid in <br />� navegetadon. Where possible, regrading will attempt to mimic surrounding topoAraphy, <br /> incorporating benches on long slopes and periodic downa|opechannels. <br /> Following active mining and pit rec|ernabon, haul roads would be regraded using cut-to-fill <br />� methods. In the case of the Upper Pit 0900 Acm*aa Road, the stand-alone reclamation grading <br />� <br /> included with the permit submittal (Tierra Group, 2019)vvou|d need to be revised to accommodate <br /> 31 <br />