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The existing road and beginning segment will be left in place to serve the postmining land use. The topsoil windrowed
<br />or stockpiled adjacent to the road will be seeded with the pastureland seed mixture.
<br />NMD Power Borehole
<br />Upon completion of mining, and when the power borehole is no longer needed, the facilities will be removed and the site
<br />reclaimed. Removal of the surface facilities will involve dismantling of surface structures, which includes the powerline,
<br />transformer and pad, road and culvert, and building. After the facilities are removed, the site will be regraded to blend
<br />with the existing terrain, the stockpiled topsoil will be redistributed over the area, and the power borehole pad and
<br />reclaimed road segments will be seeded with the pastureland seed mixture. The entire road will be chisel-plowed after
<br />removing the geotextile.
<br />NW-Mains Ventilation Shaft and Thickener Underflow Proiect (TROT-39)
<br />When the NW-Mains ventilation shaft and fan installation are no longer needed to support ongoing or future mining
<br />operations, the associated surface facilities will be removed, the shaft will be plugged and sealed, and surface disturbance
<br />areas will be reclaimed. The fan equipment, buildings, powerline, and poles will be removed and reused at another
<br />location, salvaged, or disposed of off-site. Concrete pads will be broken-up and foundations will be demolished to at
<br />least 4 feet below grade, and the resulting concrete debris will be disposed of in the shaft opening. The shaft collar
<br />concrete will also be broken up and disposed of in the shaft opening, leaving an open space for the concrete decking,
<br />concrete slab and backfill material to be placed in the shaft void. Shaft plugging and sealing will involve construction
<br />and placement of apre-fabricated framework of steel support beams, steel composite decking and 4 inches of concrete to
<br />be placed at the bottom of the shaft collar (approximately 20 feet below grade), which will rest on the lower shaft liner.
<br />Once this is completed, a 24-inch thick reinforced concrete slab will be constructed over the previously placed slab and
<br />decking. The concrete in this slab will also flow down and fill-in the annular space between the C-channel and
<br />surrounding strata as shown in Exhibit 26B, Section 3/S-1. This will effectively seal the plug at the interface of the plug
<br />and lower shaft liner. Also, tie-ins will be placed around the periphery of the 24-inch slab to allow for tying-in the rebar
<br />of the reinforced concrete slab. After this slab has cured, backfill material will be placed in the void. The backfill
<br />material will be placed to within 6 inches of the surface, and the final 6 inches will be filled with topsoil. The plug
<br />drawing is presented in Exhibit 26B, NW-Mains Ventilation Shaft Plug.
<br />Following removal of structures and equipment and plugging and sealing of the shaft; road surfacing materials and
<br />culverts will be removed and disposed of off-site; and the shaft pad and access road disturbance areas will be regraded to
<br />reestablish effective drainage and blend with the surrounding terrain. Stockpiled and windrowed topsoil will then be
<br />replaced on those disturbed areas where it was previously removed, and the areas will be seeded with a pastureland seed
<br />mixture.
<br />In reference to the thickener underflow project, the reclamation work will involve removal of the pump, hosing and
<br />piping, pump platform, support beams, powerline and poles, transformer, concrete pad, and grounding bed. The pump
<br />will be removed from the pit, along with salvageable components, and then the remainder of the platform and support
<br />beams will be dozed into the pit. The powerline and poles and transformer will be salvaged and the concrete pad will be
<br />dozed into the pit. The grounding bed will be disconnected and left in-place and covered during the backfilling and
<br />grading of the surrounding area. The area then will be topsoiled and seeded in conjunction with the reclamation of the
<br />entire portaUfacilities area.
<br />18-Right Ventilation Shaft (TR04-44, TR05-50, MR04-190, MROS-200, MR07-225, MR09-234)
<br />When the 18-Right Ventilation Shaft, emergency hoist equipment, and shaft heater are no longer required to support
<br />ongoing or future mining operations, the associated- surface facilities will be removed, the shaft will be plugged and
<br />sealed, and surface disturbance areas will be reclaimed. The emergency hoist equipment and shaft heater will be
<br />removed and reused at another location, salvaged, or disposed of off-site. Concrete pads will be broken up and
<br />foundations will be demolished to at least 2 feet below grade, and the resulting concrete debris will be disposed of in the
<br />shaft opening. The shaft collar concrete will also be broken up and disposed of into the shaft opening, leaving an open
<br />space for the concrete slab and backfill materiaUshaft cuttings to be placed in the shaft void. A cement plug shall be
<br />placed in the bottom 15 feet of the shaft and the remainder of the shaft will be filled with inert material including the
<br />shaft cuttings and collar excavation materials. A cement plug will be poured from 10 feet below grade to within
<br />MR09-234 2.05 - 105.1 02/03/09
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