2007-06-29_PERMIT FILE - C1981022A (2)

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Section - 2.05.3 point for the new batch-weigh loadout. Silo modifications included modification of the headhouse to • accommodate an increase in the width of the silo feed conveyor and address existing dust control concerns and modification of the discharge chutes and gates to feed a new batch-weigh loadout transfer belt at a rate of 6,000 tons per hour. The new transfer conveyor runs from the silo discharge point to the new batch-weigh loadout constructed adjacent to the existing sidetrack to the east of the silo. The transfer conveyor includes partial covers for dust control, walkways, and emergency stop controls for inspection and maintenance in compliance with applicable MSHA safety regulations. Batch-Weigh Loadout and Sampling System -The new batch-weigh loadout, constructed in conjunction with the 1997-7998 coal handling facilities expansion, consists of a surge bin, batch weigh bin, traversing telescoping loading chute, and associated control and ancillary equipment, all of which are contained in apre-engineered steel building. The loadout system is designed to load a unit train at a rate of approximately 6,000 tons per hour, allowing a full train to be loaded in less than two hours. A rwo-stage coal sampling system is installed on the transfer conveyor from the silo. The system includes a primary sweep sampler, dischazge chute, coal crasher, and secondary sampler. The primary sampler periodically sweeps a sample of coal off of the transfer conveyor. The sample falls into a chute that delivers the coal to a small crusher and a secondary sampler. The reject coal is conveyed back to the transfer conveyor by a screw auger. The entire sampling system is enclosed in a small metal building. Coal Refuse and Non-Coal Processing Waste General and detailed plans for coal refuse piles facilities are described and referenced in the following sections in full compliance with applicable provisions of Rules 4.10 and 4.1 ]. These plans have been prepazed by or under the direction of a qualified Registered Professional Engineer, aze illustrated by maps and drawings as referenced in the plan discussions, and include relevant geologic and hydrologic • information, geotechnical evaluations, as applicable; descriptions of operation and maintenance requirements for each disposal structure; and plans for stabilization and reclamation of refuse piles. Refuse piles have been located beyond the subsidence limits for underground mining areas, therefore, potential subsidence effects aze not a concern. The processing of raw coal from the Somerset Mine was limited to picking tables where roof rock and pazting material was manually removed from the run-of--mine coal. These materials were placed in the East Yard Area along with development refuse generated by ongaing mine development. The picking tables were removed in ]969, and the only refuse subsequently placed in this azea included minor quantities of mine development refuse and material from roof falls. Most of the coal mine refuse previously placed in the East Yard area has been scattered and blended with surface materials over the years, with the result that no distinctive refuse pile remains in this area. Since the eazly 1980's, no coal processing has occurred and the only refuse materials produced by ongoing mining and coal handling operations have been minor quantities of underground development refuse, coal refuse from roof falls, and coal refuse separated from the coal by the grizzly in the dump station. These materials have been disposed of in the East Yazd Coal Refuse Facility near the sealed C-Seam mine portals as shown on Map C8-7795A. During the six-year period from 1997 through 1997, the total quantities of coal mine refuse generated by ongoing mining operations were approximately 5,000 cubic yards annually. At this rate, the East Yatd Coal Refuse Facility was projected to reach capacity at some point during ]997 or early ]998. Given this time schedule, OMI proceeded with identification, evaluation, design, and development of a new coal mine refuse disposal area. • ]n conjunction with expansion of the Elk Creek coal stockpile, additional fill material was required to bring the stockpile pad up to the design grade. With the rugged terrain in the azea, potential Fill borrow sources are limited, and the material in the East Yard Coal Refuse Facility was identified as potentially suitable fill material for this application. TR-43 2.05-44 Revised August 2003