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Of the above structures, the following can be defined as existing structures: • R-O-M Coal Stockpile (doesn't include latest expansion area Truck Dump Secondary Crushing Building Conveyor Belts Train Loadout Trackage (doesn't include latest extension) Finished Product Stockpile Primary Crushing Building Sampling Building Stacking tube Tipple Site Structure Dimension (LXWXH) Reclaim Tunnel 537' X 20'(dia) Raw Coal Conveyor 126' X 10'(dia) Sample Building 58.8' X 27' X 55.2' Secondary Screen 42' X 42' X 68.4 Primary Crusher 54' X 27' X 48' R-O-M Coal Conveyor 168' X 10'(dia) Office 48' X 185' X 36' (Note: foundations are typically 1' - l Yz' concrete slabs with columns) Preparation Plant Foundation Concrete Concrete Footers/ trussers Concrete Concrete & Crusher Concrete Concrete footers Concrete Twentymile Coal constructed a preparation plant during 1994 and 1995 which is used to wash the existing low quality coal stockpiled in the Low Quality Coal Stockpile and low quality coal currently produced from the mine. The Low Quality Coal Stockpile is traversed along the northwest by a haul road. Ramps may be constructed along the southeast and southwest perimeters of the pile at the spoil/coal interface as necessary to move material to the plant. The • preparation plant and associated facilities are constmcted generally north of the existing low quality coal stockpile. As of May, 1999, TCC had exhausted all of the previously stockpiled low quality coal. It is now planned to run the plant per the originally thought time frame of April though October, unless conditions dictate it is run all year. In order to accommodate this schedule, approximately 200,000 - 400,000 tons of material has to be stockpiled near the existing grizzly prior to being processed through the plant during the milder part of the yeaz. The location of the stockpile is shown on Map 24. Geologic conditions have resulted in large tonnages of low quality coal which must be processed through the wash plant. In order to overcome this anticipated short term event, although the duration may be experienced in additional panels to the north, the size of the low quality stockpile requires enlazgement. Also, a segment of Ditch D-3 will be rerouted to accommodate the expansion of the stockpile. The expanded stockpile and ditch location are shown on Map 24. The material will be transported by a front-end loader From its stockpile to the grizzly. The material will then be processed through the plant. Product will be incorporated into TCC's product stockpile and this refuse will be hauled to the refuse pile. The prepazation plant is of metal construction and straddles the existing overland belt. The prep plant was designed to process approximately 250 tons per hour, and the anticipated operating season is from April through October. Production needs may vary this anticipated schedule. The prepazation plant uses a heavy media (magnetite) to separate the coal from the rock. The magnetite storage bin is located adjacent to the plant. A reclaim tunnel, prep feed conveyor belt, and hopper are constructed for transferring the low quality coal to the prep plant. A thickener tank is constructed adjacent to the prep plant. An emergency overflow sump is constructed near the prep plant in the event a power outage occurs and the thickener has to be dumped out of the system. The sump is sized to hold the thickener and allow for a • foot of free board. In the event the thickener has to be dumped the material will be pumped back into the system or over to Pond D. A small transformer pad will be constructed next to the prep plant. MR 02-181 2.05-30 11/06/02