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3.2 Shafts <br /> As described in Exhibit D, there may be up to three ventilation shafts as part of the <br /> Revenue Mine. The 960 Raise', Yellow Rose Shaft, and the Monongahela (Hubb Reed) <br /> Shaft. Each of these shafts do or will exit at the surface and therefore will generate <br /> surface disturbance that will require reclamation. This will entail removing the concrete <br /> foundations around the opening, placing dismantled equipment downhole, sealing the <br /> opening and capping with native rock materials or revegetating. <br /> The first step in reclaiming the ventilation shafts is to excavate down approximately <br /> four to six feet around each opening and cut the casing off from three to four feet below <br /> the ground surface. After removing the casing and concrete pad, the surface structures <br /> will be dismantled and placed down hole and each opening will be covered with a steel <br /> plate and sealed, upon which a six-inch concrete slab will be poured. The concrete slab <br /> will be covered with overburden or soil generated from the excavation. The volume of <br /> material required to backfill over the top of the concrete plug will be the same as the <br /> amount of material removed during shaft construction, which is estimated to be <br /> approximately 350 cubic yards of material. The final cap material will be blended in to <br /> match the local topography with a minimum of 6 inches of topsoil or other native <br /> materials (i.e., crushed rock, talus) placed on top of the backfilled areas. The final cap <br /> will be approximately 1.4 cubic yards and is included in the total backfill material <br /> volume (See Task 03D in Exhibit L). The source of the material used for reclamation of <br /> the shaft areas will be soil or other native materials (e.g., rock) generated during shaft <br /> construction. The Monongahela Shaft and associated structures are located in a <br /> previously disturbed area and will be reclaimed using materials excavated from the site <br /> to blend with the existing landscape. <br /> 1 Note:the 960 Raise will not be constructed.OSMI will apply for an acreage reduction for the 960 Raise area <br /> following approval of Amendment 02. <br /> Exhibit E Reclamation Plan E-6 <br /> Amendment 02 <br /> Updated August 2022 <br />