Laserfiche WebLink
The void from on top of the concrete slab to within five feet of the surface will be backfilled with fill material <br />(approximately 1.4 CY) from the surrounding azea. The next two feet of the shaft will then be filled with concrete to <br />• form a top plug for the shaft. Fill material will be placed in the remaining three feet of the shaft (approximately l.4 <br />CY) and then the site will be topsoiled and revegetated. The redistributed topsoil will be seeded with the pastureland <br />seed mixture. <br />EMD Ventilation Site <br />When the facilities are no longer required, they will be dismantled and removed from the site. The fans and associated <br />buildings will be hauled away from the site. The concrete pads will be broken up and placed into the cased holes. The <br />bottom fifteen feet of each hole will have a cement plug placed in it and the remainder of the hole, excluding the <br />Twentymile Sandstone and 20 feet above and below it, will be filled with inert material. The top ten feet, excluding the <br />top 3 feet that will be filled wi8r soil, will have a cement plug placed in it. <br />After the holes have been plugged and the building materials removed, the site will be regraded to blend in with the <br />surrounding topography. The topsoil will then be reapplied to the site and seeded with a pastureland seed mixture. <br />Dewatering Borehole <br />Upon completion of mining, and when the system is no longer required, the facilities will be removed and the site <br />reclaimed. Removal of the surface facilities will involve dismantling of surface structures, wheh includes the <br />powerline, transformer and pad, chemical and pump control building and pad, ponds, and road. After the facilities are <br />removed, the site will be regraded to blend in with the existing topography and the stockpiled topsoil redistributed over <br />the area. The topsoil redistributed over the dewatering site and reclaimed road segments will be seeded with the <br />pastureland seed mixture. The existing road and beginning segment will be left in place to serve the postmining land <br />use. The topsoil windrowed or stockpiled adjacent to the road will be seeded with pastureland seed mixture. <br />• NMD Power Borehole <br />Upon completion of mining, and when the power borehole is no longer required, the facilities will be removed and the <br />site reclaimed. Removal of the srrface facilities will involve dismantling of surface structures, which includes the <br />powerline, transformer and pad, road and culvert and building. After the facilities are removed, [he site will be <br />regraded to blend in with the existing topography and the stockpiled topsoil redistributed over the area. The topsoil <br />redistributed over the power borehole pad and reclaimed road segments will be seeded with the pastureland seed <br />mixture. The entire road will be chisepplowed after removing the geotextile. <br />NVV Mains Ventilation Shaft And Thickener Underflow Prolect(TROl-39) <br />When the IdW Mains ventilation shaft and fan installation are no longer required to support ongoing or futwe mining <br />operations, the associated surface facilities will be removed, the shaft will be plugged and sealed, and surface <br />disturbance areas will be reclaimed. The fan equipment, buildings, power line, and poles will be removed and reused at <br />another local, salvaged, or disposed of off-site. Concrete pads will be broken up and foundations will be demolished to <br />at least 20 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 into the shaft opening, leaving an open space for the concrete decking, <br />concrete slab and back£11 material to be placed in the shaft void. Shag plugging and sealing will involve constmction <br />and placement of apre-fabricated framework of steel support beams, steel composite decking and 4" of concrete to be <br />placed at the bottom of the shaft collaz (approximately 20' below grade), which will rest on the lower shaft liner. Once <br />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 Gchannel and <br />• surrounding strata as shown in Exhibit 26B, section 3/S-I. 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 this reinforced concrete slab. After this slab has cured backfill material will be placed in the void. The backfill <br />TR 02- 40 2.05-105.1 1/7/02 <br />