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Response to DRMS Adequacy Review-Cotter 1D-8 Mine Reclamation Plan Amendment <br /> 111 Revised Exhibit E <br /> Reclamation Plan <br /> JD-8 Mine Permit Amendment <br /> Response to Adequacy Review <br /> M-1984-014 <br /> Cotter Corporation(N.S.L.)("Cotter")will restore the affected areas associated with the <br /> ventholes on the JD-8 U.S. Department of Energy("DOE") lease tract in accordance <br /> primarily with DOE's lease requirements on the JD-8 lease. The land will be reclaimed <br /> for range and wildlife habitat to meet DOE's directive to return the land as closely as <br /> possible to the pre-mining land use. Cotter will reclaim the affected areas on the <br /> patented Opera Box and Doagy No. 2 claims in accordance with the Division of <br /> Reclamation, Mining and Safety standards. <br /> This area of Montrose County is zoned agricultural-open. The current land use is <br /> predominantly mining and grazing, as is the majority of the land in the near vicinity of <br /> the mine site. The proposed post-mining land use for range and wildlife habitat should <br /> improve forage and habitat for both wildlife and stock. <br /> Lower Mine Waste and Portal Area <br /> The reclamation plan for the lower mine waste and portal area is to remove the shop/dry <br /> building that will be located near the portal area, grade the waste dump on the uphill side <br /> into the existing hillside at a slope angle reflecting the surrounding topography(3H:1 V or <br /> flatter). During construction of the upper portion of the lower mine waste dump the <br /> waste material will be stacked in approximately 10 foot lifts, with six feet benches <br /> between the crest of the lower lift and the toe of the upper lift. This will reduce the <br /> amount of material that will need to be moved during the re-contouring process to <br /> achieve the final 2H:1 V desired slope after mining is completed. The remaining sides of <br /> this mine waste area will be re-contoured to a 2H:IV slope using a D-6 dozer or <br /> equivalent,which will allow it to more readily blend in with the surrounding topography. <br /> The mine portal will be backfilled with material immediately below the ore pad area and <br /> other mine waste material to a depth of 50 feet or until competent ground is encountered, <br /> and then mine waste will be graded into the hillside around the portal area. Once re- <br /> contouring of portions of the mine waste dump is complete the previously stockpiled soil <br /> cover material will be spread out to lightly cover the mine waste material prior to <br /> seeding. This approach has been used at quite a few previously reclaimed DOE/Cotter <br /> reclamation efforts, and has proven to be very effective with this type of mine waste <br /> material when available soil is limited, as is the case here. <br /> Included as part of this Exhibit E are three maps showing the results of the radiometric <br /> survey conducted at the lower mine area, and at the proposed access roads and venthole <br /> sites on top of Monogram Mesa. <br /> The reclamation plan for the proposed ventholes is to plug the shaft using either <br /> polyurethane foam with a thickness of 10 feet, or concrete with a thickness of 3 feet, <br /> 411) placed far enough down the hole that a minimum of several feet of mine waste and 1 foot <br /> of soil cover material can be placed on top of this plug,assuming DOE desires to have <br /> Page A-14 <br />