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belt struchnc. In addition, i[ is possible that [he belt take-up may require an additional concrete support slab <br />immediately adjacent to the east wall of the secondary crusher, but this is dependent upon final take-up location. <br />TCC has included the costs for this additional slab in [he associated bond calculation in the even[ this slab <br />becomes necessarv. <br />The support bents will be of typical steel construction, with the further most ben[ being of 4-leg construction, <br />while the inner bent will be of 2-leg construction. These bents will be supported by 48" diameter concrete piers <br />extending approximately 25 feet down to bedrock. These piers will be connected by grade beams (footers) <br />approximately I' x 4' ~ IS' to form the foundations. The drive structure will be a steel frame construction <br />elevated on four 30" diameter piers which will also extend approximately 25' to bedrock. The 12' x 16' x 10' <br />MCC building will be of typical metal construction, and will be placed on a 12' x 16' x 6" slab constructed over I' <br />x 4' foundation footers. Soil will be removed for pier construction either by using and auger rig or by excavating <br />with a backhoe or similar piece of equipment. The balance of the remaining site prep will likely be done using a <br />small dozer or backhoe. Soil removed for the installation of the piers, footer, and slabs will be used to backtill <br />around the piers and footers, or will be spread out depending on the situation. <br />I[ is anticipated that the concrete piers associated with [his structure will be buried in place, with the grade beams <br />and the upper 4 feet of each pier being removed and transported to the tipple building area or portal highwall for <br />disposal on site. <br />I[ is anticipated that power will be supplied to the belt either by running power from the secondary crusher <br />building along the structure, or by installing a power line from the substation east of [he Tipple over to [he MCC <br />building. <br />The 4-leg bent has been designed for a revetment enclosure in the event TCC should decide that [he 4-leg bent <br />• (constructed similar to the MR 93-93 revetment framing) requires a protective covering at some future time, and <br />the associated band calculation reflects [he construction of such an enclosure for this bent. It is possible that TCC <br />will conshvct a portion of the revetment around the ben[ during the initial construction, with the remained to be <br />completed at a later time. <br />An access site and temporary coal storage facility will be constructed within the disturbed area between the west <br />side of the tunnel loadout and the Pond B treatment facility. This site will be used for periodic coal cleanup done <br />in the loadout tunnel and associated segment of railroad [rack. During the cleanup activities coal may be <br />temporarily stockpiled for 3 or 4 days prior to haulage to the tipple. Coal cleanup will be required on the average <br />of 4 or 5 times a year. Each cleanup will consist of 4 or 5 hours of work to remove 2 to 4 tons of coal. Recovered <br />coal will be framed from the tunnel by a loader and loaded into a dump truck which carries the spilled coal [o the <br />coal srockpile for recycling. The drainage from this area will drain into [he existing Pond B treatment Facility. <br />This site may also be covered with rock to facilitate operations during wet weather. The location of the site is <br />shown on Map 24. <br />In order to facilitate the construction of [he proposed preparation plant i[ will be necessary to drive a total of 84 <br />pilings to support the various preparation plant facility buildings. A total of thirty pilings will be placed under the <br />footprint of the preparation plant building, and these will be approximately 10 inches wide and 21 feet in length. <br />The thickener building will require 20 pilings, and they will be approximately 8 inches wide and 24 feet in length. <br />The conveyor supports will require 24 pilings, and they will be approximately 8 inches wide and 21 feet in length. <br />The reclaim hopper and tunnel will require 10 pilings and they will be approximately 10 inches wide and 10 feet in <br />length. A piling driver rig will be used to install the pilings. The location of the various structures and the pilings <br />• are shown on Map 24, Surface Facilities. <br />A concrete pier (cap) will be constructed on [op of the pilings and the total project will require approximately 230 <br />CY of concrete. The preparation plant and the thickener tank will have a floor in addition to the pilings. The piers <br />MR 97-154 2.05-34 Revised 9/9/97 <br />