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IV.C.7 Overland Conveyor System 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 feeder. <br />Goal is conveyed on a 48-inch-wide conveyor belt running at 600 feet per minute. Access area is <br />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 which provide weather protection and security for the <br />conveyor drive equipment and auxilliaries. The conveyor belt electric motor starters are located in the <br />building. A dust hood over the coal chute transfer location collects the dust using a vacuum blower to <br />draw up the dust into a bag filter house. The dust is vibrated or back-blown free of the bag filters and by <br />gravity runs through a rotary feeder and is piped back onto the belt slightly behind the coal being <br />dumped onto the belt. The dumped coal covers up and absorbs the dust. Any coal that is inadvertently <br />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 crossings <br />were constructed at appropriate intervals along the conveyor. The overland conveyor conveys coat up a <br />12-degree slope, travels overland changing direction at the transfer points and terminates at the clean <br />coal storage area. <br />Maps 106-113 show the existing ground contour and the details and elevation of the conveyors. Both <br />the contour and conveyor belt elevations run parallel to each other; therefore, only a small amount of <br />earth was excavated. <br />The overland conveyor is supported by an elevated steel box-truss sVucture over the mine area. The <br />maximum height of the supporting steel bents is approximately 75 feet, The bents are spaced about 100 <br />feet apart for the elevated trusses and supported by concrete foundations. The foundations are one foot <br />above ground level and buried below the frost line. <br />The overland conveyors that follow the contour of the land are supported by small concrete foundations <br />spaced ten feet apart along the entire conveyor length. These foundations are about one foot above <br />ground and are buried below the frost line. <br />A maintenance plan is in place for removal of coal accumulations along the Overland Conveyor <br />Structure. Significant accumulations that occur from spillage during the previous month will be removed <br />and disposed of at the Refuse Area. Belt turnover areas as well as sediment control structures will be <br />inspected monthly for accumulations and cleaned as necessary. Areas that cannot be reached by <br />motorized vehicles, such as CNV-1 above the Bath House parking lot, will be cleaned using manual <br />labor. A hay bale and silt fence sediment trap structure has been installed at this area for additional <br />protection of coal fines contamination into the undisturbed drainage system. <br />Mine Permit Renewal #3 (Rev. 8/99) IV-10 <br />