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Permit M-1977-493—Climax Mine Table E-9: Reclamation Cover Areas by Facility Facility Reclamation Cover Areas (ac) McNulty OSF 683.4 North OSF 235.4 Mayflower TSF 883.4 Tenmile TSF 625.1 Robinson TSF 456.8 Robinson Lake Area 42.6 1 Dam 126.8 3 Dam 28.9 5 Dam 60.9 Mill and Pit Area 241.1 Roads 112.8 E-11.1 Open Pit Most of the open pit will not be revegetated due to accessibility and safety concerns (Figures F-03 and G-03, Exhibits F and G, respectively). Thus, most of the open pit will be reclaimed to a talus community(see Exhibit J: Vegetation Resources for community description). The final slopes will likely remain at their current configuration. Weathering, colluvial deposition by gravity, and ice action will cause natural reshaping of the benches and highwalls over time, but blasting may also be used to soften visual impacts. Administrative controls (fencing and access restrictions)will be maintained to control public access. A haul road fill area is located on the south crest of the open pit (also known as Ceresco Ridge). This road fill will be excavated down to the pre-mining ground, hauled, and placed on the bottom of the pit. The pre-mine ground beneath the haul road fill will be reclaimed with reclamation cover. On the margins of the pit, where slopes are less steep, some revegetation may be possible. In these cases, topsoil may be hauled from a nearby reclamation cover stockpile, then seeded with the appropriate seed mix. E-11.2 McNulty and North 40 Overburden Storage Facilities The lower portions of the McNulty and North 40 OSFs may be reclaimed concurrently with production, but final reclamation will not be completed until the OSF is no longer required for production. Final grading of the OSFs will be not steeper than 2H:1 V with some areas considerably less steep. Prior to reclamation cover placement, the angle of repose inter-bench slopes will be flattened to 2H:1 V with sideslope channels graded into the remaining benches. The sideslope channels will report to articulated concrete block-lined downdrains. The haul road area east of the McNulty OSF will be regraded to remove the roads and blend the area slopes to match adjacent topography. A reclamation cover will be placed after the regrade is completed. It is anticipated that sufficient soil will be salvaged and stockpiled prior to the construction of McNulty and North 40 OSFs for final surface reclamation. Reclamation cover salvaged from the McNulty and North 40 OSF sites will be stockpiled in one of four adjacent locations (Figure F-02, Exhibit F). Estimated reclamation cover quantities (Exhibit I)suggest that a minimum of 24 inches of reclamation cover (subsoil and/or topsoil) can be placed over the overburden rock. Long-term success of the plant community will be directly influenced by the quality and quantities of soil placed. After reclamation cover placement, the lower portion of the OSF (below 11,800 feet)will be seeded with the upland standard seed mixture (Section E-7.1.2). Higher elevation areas will be seeded with the alpine seed mixture (Section E-7.1.3). Figure G-04 (Exhibit G) illustrates the final configuration of water handling facilities and Figure F-04 (Exhibit F) illustrates the anticipated final revegetation. Exhibit E E-14 May 2024