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• IV.C,6 Sampling and Surge Hopper Building Washed coal from the preparation plant is <br />transported by Conveyor BC-108 to the sampling building. Here the washed coal is sampled in <br />order to monitor the operation of the preparation plant. <br />The sampling and surge building is approximately 36 feet by 20 feet by 90 feet high. It is supported <br />on conventional spread footings. <br />A 150-ton surge hopper is located in the same structure as the sampling system to provide <br />smoother operation of the conveyor system transporting coal to the train loadout-storage area. <br />IV.C,7 Overland Convevor Svstem The 150-ton surge hopper is unloaded at 1,200 tons per hour. <br />The cleaned coal, sized two-inch and smaller, is fed onto the overland conveyor with a vibrating <br />feeder. Coal is conveyed on a 48-inch-wide conveyor belt running at 600 feet per minute. Access <br />area is provided to add a dust hood and bag filter over the feeder at a later date, if required. <br />Coal is transferred to the transfer buildings that provide weather protection and security for the <br />conveyor drive equipment and auxiliaries. The conveyor belt electric motor starters are located in <br />the building. A dust hood over the coal chute transfer location collects the dust using a vacuum <br />blower to draw up the dust into a bag filter house. The dust is vibrated or back-blown free of the bag <br />• filters and by gravity runs through a rotary feeder and is piped back onto the belt slightly behind the <br />coal being dumped onto the belt. The dumped coal covers up and absorbs the dust. Any coal that <br />is inadvertently spilled onto the ground is cleaned up on a periodic basis. <br />The overland conveyor passes over the mine refuse haul road and County Road 65. Animal <br />crossings were constructed at appropriate intervals along the conveyor. The overland conveyor <br />conveys coal up a 12-degree slope, travels overland changing direction at the transfer points and <br />terminates at the clean coal storage area. <br />Maps 106-113 show the existing ground contour and the details and elevation of the conveyors. <br />Both the contour and conveyor belt elevations run parallel to each other; therefore, only a small <br />amount of earth was excavated. <br />The overland conveyor is supported by an elevated steel box-truss structure over the mine area. <br />The maximum height of the supporting steel bents is approximately 75 feet. The bents are spaced <br />about 100 feet apart for the elevated trusses and supported by concrete foundations. The <br />foundations are one foot above ground level and buried below the frost line. <br />• Permit Rev. 4 (11/2002) IV-10 <br />