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The first step in reclaiming the ventilation shafts is to excavate down approximately <br /> four to six feet around each opening and cutting the casing off from three to four feet <br /> below the ground surface. After removing the casing and concrete pad, the surface <br /> structures will be dismantled and placed down hole and each opening will be covered <br /> with a steel plate and sealed, upon which a six-inch concrete slab will be poured. The <br /> concrete slab will be covered with overburden or soil generated from the excavation. <br /> The volume of material required to backfill over the top of the concrete plug will be the <br /> same as the amount of material removed during shaft construction. The backfilled <br /> material will be blended in to match the local topography with a minimum of 6 inches <br /> of topsoil or native materials placed on top of the backfilled areas. The sources of this <br /> material 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 /> 3.3 Dismantle Buildings and Structures at Portal Area <br /> Reclamation will include the removal of certain buildings and other structures. The <br /> following structures will be removed at the Revenue Portal area: <br /> • Diesel storage and filling station <br /> • Propane storage A <br /> • Propane storage B <br /> • Propane storage C <br /> • Ventilation Fan <br /> • Underground warehouse and shop <br /> • Reagent Room <br /> • Waste storage building and secondary containment <br /> • Tailing thickener tank <br /> • Materials storage buildings <br /> Exhibit E Reclamation Plan E-5 <br /> Amendment 02 <br /> December 2021 <br />