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• The overland conveyors that follow the contour of the land are supported by small concrete <br />foundations spaced ten feet apart along the entire conveyor length. These foundations are about <br />one foot above 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 <br />removed and disposed of at the Refuse Area. Belt turnover areas as well as sediment control <br />structures will be inspected monthly for accumulations and cleaned as necessary. Inaccessible to <br />motorized vehicles, such as CNV -1 above the BathHouse parking lot, will be cleaned by hand. <br />Long conveyor belts are twisted 180 degrees after the discharge pulley. This puts the clean side of <br />the belt in contact with the return idlers reducing idler and belt wear and prevents particles of coal <br />from falling under the conveyor. Another 180 -degree twist is made ahead of the tail pulleys. <br />Conveyors are covered the entire length. The covers extend about three-quarters the area around <br />the belt to protect the conveyor from snow and rain and keep the wind from blowing coal off the belt. <br />Upon reclamation, conveyors and transfer buildings will be dismantled and removed or buried on <br />site after mine operations cease. Foundations will be removed or demolished to below ground line <br />and the area regraded and revegetated as required. <br />• IV.C.8 Clean Coal Storage Coal is transferred at a rate of 1,500 tons per hour from the overland <br />conveyor onto a tripper belt located within the 25,000 -ton slot storage facility. This tripper runs back <br />and forth the length of the storage facility directly under the ridge of the roof. <br />The bottom of the storage facility is below ground level. The sidewalls of the storage facility below <br />ground were fabricated from reinforced earth concrete modules with metal tiebacks into the <br />surrounding earth. Directly beneath the storage center and running the total length are two <br />moveable plow feeders that reclaim 3,000 tons per hour of coal from the "V" -shaped bottom of the <br />storage and feed the coal onto a conveyor that is enclosed in a 12 -foot high by 18 -foot wide reclaim <br />tunnel. The bottom of the tunnel is sloped towards one end for water to drain into a sump pump. <br />The drainage water is pumped to an above ground local settlement pond. <br />At one end of the storage, a square concrete shaft houses an automatic elevator vertical access <br />stairwell and an equipment removal well. A ventilation fan removes air from the 12 -foot x 18 -foot <br />concrete reclaim tunnel beneath the entire length of the storage barn. The barn roof vents vent any <br />accumulation of methane gas from the coal to the atmosphere through filters to keep the coal dust <br />inside the storage facility. The portion of the storage above ground is supported by steel girder <br />bents and covered with siding to keep the dust totally inside the storage. <br />• Permit Rev. 4 (1112002) IV -11 <br />