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they will be grouted from the bottom to the top to stabilize them in the hole. hr order to hang the power cable in the <br />hole a steel structure will be constructed over two or three of the cased holes. (The additional holes~borings are <br />discussed in the fo]]owring paragraph.) These structures are metal beams supported on metals legs, which are bolted <br />into a concrete footer. The beams will be either 14' (one each) or 10' (up to three} feet in length, and the Legs will be <br />approximately G.S or 8' in height. The footers are approximately 4' x 4' x 4'. The 14' beam structures will be <br />placed over the 24" borehole. Also, a 7' x 10' by .3' pad will be poured around the 24' borehole. The 16" beam <br />structures will be placed over the 6" diameter borings. A 7' x 6' x .3' pad will be poured around these borings, <br />As part of the above, TCC will advance up to three additional G inch cased borings at the existing NMD Power <br />Borehole. This is required due to problems encountered in grouting the casing as approved in TR 00-37. These <br />borings will be located on the same pad as the NMD Power Borehole, as they will terminate in the same entry <br />underground as the NMD Power Borehole. During the boring of the holes the existing mud pit will be utilized, <br />although it will require that it be dug out and reestablished at the site. It is in the same location as it was originally <br />located. When the borings are complete the pit will 6e backfilled and the pad graded as per the above. <br />D4INE WATER RECYCLING SXSTENI -FISH CREEK BOREHOLE (MR 02-179) <br />TCC is planning on constructing a mine water recycling Line from the Fish Creek Borehole ponds that will tie into <br />the escape shaft and 10 Right underground waterline. The location of the line and associated facilities is sitor~m on <br />Map 24, Surface Facilities. The water line will further improve TCC's mine water recycling program and minimize <br />the volume of water that has to be imported from outside the mine for dust control, <br />The installation of the recycling system will require the following activities: 1) installation of pumping system at <br />Fish Creek Borehole facility, 2) electrical and control system modification, 3) installation of waterline from western <br />settling cell to escape shafr and 10 Right waterline, 4) tying of water line from pond to escape shaft and 10 Right <br />waterline, and 5) installation of manholes along waterline for installing "T's" for stock tank feeds, <br />The installation of the pumping system will require construction of a concrete pad to house the pump and control <br />building, The pad wilt be sloped towards the cell, or a drain pipe may be installed, so that water that gets onto the <br />pad will drain back into the cell. A suction line from the pump will be placed in the western settling cell for <br />pumping of the water up to the escape shaft or 10 Right waterline. The existing water treatment s}~stem will <br />continue to function in order to provide acceptable quality water for use in the underground mine's dts[ su;;,~ression <br />system. The dischazge line from the pump will be placed over the cell embankment and then buried and tied into the <br />waterline. The section of the discharge or suction line that is exposed to the air may be insulated to prevent 1Teezing. <br />The building will be constructed on top the concrete slab to house the pump and controls for the pumping system. <br />The concrete slab (approximately 12' x 20' x 2') will be placed on top of the existing berm. A limited quantity of <br />fill will be needed for the slab constnuction, The fill will be placed on the west side of the existing cell embanlanent. <br />The fill material will be obtained fmm within the boundary of the disturbed site or brought in from the portal area. <br />Once the new building is constructed the building housing the acid feed system will be de-energized and, if not <br />required for additional storage, removed from the location. The power feed from the existing substation will be <br />extended over to the pump station. The extension of the powerline will require the installation of two additional <br />power pales. All of these construction activities will be done in a previously disturbed area. <br />The waterline will be installed along the existing mad corridor, except for that segment which traverses the <br />reclaimed and bond released surface mine area. In areas where the waterline will be installed in the road corridor the <br />trench will be excavated either down the center of the road or along the shoulder. Field conditions will dictate the <br />location of the trench excavation. <br />The segment of the line which traverses the former surface mine area will require that the available topsoil be <br />salvaged and then replaced back on top of the trench excavation. For this segment the topsoil will be salvaged and <br />PR 03-OG 2.D5-65.3 04/29/04 <br />Z•d <br />~,~„ _.;: _ : ~._ eLE = T T bt7 6Z add <br />