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Reclamation Summary <br />Sunnyside Basin Permit Area — M-77-378 <br />The Sunnyside Basin permit area, consisting of 66.50 acres, was reclaimed according to the <br />approved reclamation plan in 1991.1992. <br />Reclamation included; <br />• filling the Lake Emma subsidence feature. <br />• capping the subsidence feature with low permeable lake sediments stockpiled on-site. <br />• grading around the filled subsidence feature to minimize infiltration, grading of borrow <br />areas and erosion control. <br />• seeding the disturbed area with the approved seed mix, applying fertilizer, and mulch. <br />Seeding and fertilizer application was completed with a hydro -seeder and mulch was <br />applied with a hay -thrower. <br />This reclamation was completed in 1992 and has been in monitoring and maintenance status <br />since completion of reclamation plan implementation. <br />Snow and ice had accumulated in the void of the Lake Emma subsidence feature prior to filling. <br />As this snow and ice melted after fill placement, some additional subsidence occurred. This <br />subsidence was repaired annually for over ten years using the low permeable lake sediments to <br />re-create the graded surface. In addition the high altitude environment with a normal dry early <br />summer month (usually June) has been hard on the emerging vegetation, although it has <br />established itself at the slow pace normal for the altitude similar to the tracts previously released. <br />As noted in the 2017 DRMS permit inspection, "vegetation appears to be adequate in both <br />density and diversity, and shows signs of multiple year's biomass indicating that the populations <br />are self-sufficient. No erosional issues or noxious weeds were observed in this area." Also, the <br />2014 DRMS permit inspection encouraged SGC to submit a notice of completion of reclamation <br />and request for acreage reduction to remove this area from the permit. <br />The vegetation has been improving annually and no maintenance work has occurred for at least <br />ten years. The area is stable and meets the post -mining land use and minimum vegetation criteria <br />required for release. <br />