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Conveyor 8C-107 conveys refuse to the refuse surge hopper for loading onto haul trucks. These <br />conveyors are shown on Map 15. <br />Because of the anticipated reliability of the equipment, no provisions are made for emergency <br />stockpiling at the mine mouth if the infra-plant conveyor system breaks down. In such a situation, all <br />mine production will be stopped. <br />The surge bin is equipped with a trash grizzly which intercepts and removes large pieces of rock or trash <br />which might Gog the bin or damage the conveyor. This refuse is collected in a trash bin and disposed of <br />as discussed in the section entitled "Waste Transportation and Disposal Facilities". <br />All of the conveyors are in enclosed galleries or are partially covered to provide protection from precipi- <br />tation, prevent fugitive dust, and improve maintenance access during winter months. A belt wiper is <br />provided at the discharge end to remove material adhering to the belt. All of the transfer points are <br />enclosed to minimize dust emissions. <br />Conveyors will be dismantled and removed after mine operations cease. Foundations will be removed <br />or demolished to below ground line and the area around them regraded and revegetated as required. <br />IV.C.2 Rotary Breaker A rotary breaker is located at the end of the conveyor from the 150 ton surge <br />bin. The breaker reduces the 6"x0 ROM coal to a predetermined size of 4"x0. The breaker also <br />removes large pieces of rock, wood, and tramp metal. This debris is collected in a trash bin and <br />disposed of as discussed in the section entitled "Waste Transportation and Disposal Facilities". <br />IV.C.3 Storage Silos From the breaker, ROM coal is conveyed to two raw coal storage silos. Each silo <br />is 70 feet in diameter, 150 feet high and capable of storing 10,000 tons of coal. The silos are reinforced <br />concrete and are supported on a poured reinforced concrete block. <br />ROM coal is reclaimed from the silos by vibrating feeders. A conveyor transports coal to the preparation <br />plant. <br />IV,C.4 Temnorarv Storage During the early stages of the coal mine, ROM coal was stored at the D <br />Portal site. A diverter gate was (and is) provided at the top of the 150-ton surge bin to divert the ROM <br />coal through a chute to the ground. The coal was then moved by front-end loaders and trucks and/or <br />temporary conveyors to storage areas southwest of the breaker and northwest of the preparation plant. <br />See Maps 15, 25 and 26. The coal was compacted to prevent spontaneous combustion. Dust emission <br />was controlled by watering. All precipitation runoff from the coal storage areas passed through sediment <br />pond DP-1. <br />Mine Permit Renewal #3 (Rev. 8/99) IV-8 <br />