Laserfiche WebLink
2.05.3 <br />r ~ <br />~J <br />C7 <br />TR-48 <br />.~ PP2oV~ <br />S~Z~~a ~ <br />Conveyor Underpasses <br />Three conveyor underpasses were constructed for the downhill conveyor project. <br />One is located on the portal bench. The second is located immediately below the <br />downhill conveyor transfer building. The third is located about midway along the <br />downhill conveyor and will serve as a wildlife overpass. A fourth conveyor <br />underpass was constructed to provide haul road access over the downhill conveyor <br />to the B-Seam portal bench. The underpasses are 9-foot diameter multi-plate and <br />are approximately 100-feet long. The B-Seam conveyor multi-plate underpass is <br />approximately 60-feet long supported on concrete footers as shown on Map 38. A <br />3,400 face square foot retaining supports the road up to and over the multi-plate. <br />The retaining wall is reinforced with Tensar geogrid and faced with decorative <br />concrete block. <br />Water Treatment Building <br />A small (10'X10') water treatment building located northwest of Pond C used to add <br />CDPS approved chemicals to the water as necessary for clarification. <br />Bent Protectors <br />Two concrete bent protectors located at the coal stockpile level. One is three sided <br />with 20 feet high walls, 42 feet long and 16feet wide. The other is a four sided <br />structure with 28 foot average height walls, 48.5 feet long and 15.5 feet wide. The <br />four sided structure has a metal roof. <br />Rock Bins <br />Concrete bins located at the B-Bench. The concrete base is 20 feet by 30 feet. The <br />8 foot high walls are 40-feet long <br />Retaining Wall <br />Concrete retaining wall located at the B-Bench. The 8-foot high retaining wall is <br />approximately 50-feet long. <br />Hubbard Creek Shafts <br />See Map 39 for the location of the two shafts. The shafts will be constructed during <br />2007 and 2008. They will be lined with steel and have a finished diameter of 10.5 <br />feet. The steel liner will be cemented in place. Prior to drilling, the perimeter of the <br />shafts will be grouted to minimize water infiltration. Grouting will be extensive in the <br />collar area and maybe reduced when the shaft alignment encounters solid rock. The <br />shafts will be blind bored the entire depth of approximately 500 feet. The cuttings <br />removed from the shafts are considered underground development waste and will <br />therefore be hauled to one of the approved gob disposal areas. <br />2.05 -16 - 08/07 <br />