2025-09-02_REVISION - M2023015 (4)

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London Mountain Clean Up July 2025 E-2 Exposed bedrock will remain as the final ground condition. Remove all loose material from the disturbance area and use at other sites for grading. No topsoiling or revegetation in this environment. Any revegetation taking place will be conducted using the seed mix below. Seed will be drilled in all areas that are practicable. When drill seeding is not practical, broadcast seeding may be conducted at twice the drilled rate described in Table E-1. Table E-1. Alpine Rangeland Seed Mix Species Lbs/acre Alpine timothy 0.5 Tufted hair Grasse 0.4 Alpine Bluegrass 0.5 Sandberg Bluegrass 0.5 Spike Trisetum 0..2 Common Yarrow 0.06 Colorado Blue Columbine 0.4 TOTAL 2.56 2. Post Mine Land Use The post mine land use for all reclaimed waste piles will be alpine wildlife habitat. This is consistent with the other high-altitude land surrounding the waste piles in the Mosquito Gulch area. The post mine land use is consistent with local and state land use goals for this area. The London Mine post mine land use is unchanged; see Appendix 1 for details. 3. Reclamation Schedule The reclamation schedule of each waste pile will vary depending on its size and mining environment. The general sequence of reclamation for all waste piles will be as follows: once a large enough area of a waste pile is excavated out to, typically beginning from the top, the underlying ground will be graded to final slopes and then topsoiled and seeded according to the mining environment that the waste pile is in. Grading will be conducted in two to four weeks. Topsoiling and seeding will be completed in two to four weeks, in general. Final reclamation monitoring and maintenance of stormwater control structures and diversion structures will be conducted for two years following reclamation to ensure permanent stability. Water quality treatment for sediment will discontinue once the site has achieved permanent stability.