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(b) Underground Mining <br />Coal produced from the Bowie No. 2 Mine was previously trucked to <br />the loadout near Paonia. The loadout could handle up to 5 million tons <br />per year of coal produced from the Bowie No. 1 and No. 2 Mines <br />and/or other mines in the area. Air Emission Permits limited production <br />throughput at the Bowie No. 1 Mine loadout to 5.0 million tons per year. <br />Coal haul trucks entered the loadout facility from State Highway 133. <br />The trucks dumped their loads into two 25 -ton bins within the truck <br />dump. They proceed around an access loop and returned to State <br />Highway 133. The dumped coal emptied from the bins onto an <br />enclosed 42 -inch conveyor, R-1. The coal was stored in one of three <br />silos, any of which could be filled or used alone or in combination <br />through the use of conveyors R-1, R-2, or R-3. Each silo was 70 feet in <br />diameter and 110 feet high, and has a 7000 ton capacity. <br />A 10,000 -ton, 100 -car unit train was loaded via reciprocating feeders <br />located below the silos. The feeders loaded onto a 72 -inch enclosed <br />conveyor, R-4 where coal was weighed on a belt scale on its way to the <br />train loading building. Conveyor R-4 emptied into a 250 -ton surge bin <br />for flood loading of each railroad car. A chute was raised and lowered <br />inside the car to maintain desired loading height and to control dust. A <br />portion of the coal within the bin was crushed and bagged for chemical <br />analysis. After a rail car was loaded, the top may have been sprayed <br />(depending on customer requirements) with a latex based crusting <br />agent to control dust emissions on the trip to the user. Approximately <br />500 unit trains could have loaded per year. <br />All buildings were constructed using conventional structural steel <br />framing and enclosed with steel siding. Floors were constructed using <br />grating, checkered -plate or concrete decks. Foundations for all <br />structures are of reinforced concrete. <br />All conveyors were enclosed by steel siding or corrugated steel <br />conveyor enclosures. <br />RN -07 2.05-3 02/18 <br />