2025-04-08_PERMIT FILE - C1981019A

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RULE 2 PERMITS Rule 2 Permits 2.05-27 Revision Date: 3/7/25 Revision No.: TR-166 revegetated. The consideration of rangeland as a post-mining land use is identical to the discussion in Section 2.04.3. The limitations on changing to an alternative land use are fully discussed in that Section. 2.05.6 Mitigation of Surface Mining Operation Impacts Air Pollution Control Plan Colowyo maintains fugitive dust control measures as an integral part of all mining and reclamation activities. Presently, Colowyo operates under numerous Emission Permits issued from the Colorado Department of Health, Air Pollution Control Division, as more particularly described in Section 2.03.10. Copies of all applicable emission permits issued by the Colorado Department of Health are available onsite and can be reviewed by request. Colowyo conducts air quality monitoring at the site in accordance with the requirements of the emission permits. The principal fugitive dust control practices employed by Colowyo are as follows: Roads Colowyo employs a dust suppression program for in pit roads and other unpaved roads which primarily involves periodic watering. Mine water trucks run periodically as needed over the roads wetting down any dusty conditions. During the dryer months of the year, the water trucks will wet down the roads which are being utilized a minimum of two or three times per shift. If determined to be necessary as an addition to periodic watering, a chemical dust suppression agent may be used during the dry months on the primary in pit roads. To this date, however, chemical stabilization of the unpaved in pit roads has not been successful for more than a short period of time due to changing weather conditions and the use of heavy haulage trucks. Colowyo has surfaced “in-pit” roads with gravel or crushed rock; however, no roads in the pit area will be paved with asphalt. Asphalt could not sustain the enormous weights of the haulage equipment currently in use. Likewise, crawler equipment would rip the asphalt surface causing an extremely hazardous condition for all equipment and personnel. All roads in the mining operation will be constantly maintained by a motor grader, scraper, or rubber tired dozer to remove any coal, rock, or any other debris. Smooth and clean road surfaces are essential for not only minimizing dust, but also for allowing efficient, safe and economic use of haulage equipment. The haul roads have been paved with asphalt to provide for emission control. The paved roads include approximately five miles of road from State Highway 13to the main office building, the road from the main office building to the Gossard coal loadout, and the road from the shop facility to the Gossard coal loadout. A strict speed control will be implemented for all roads to control dust and to provide for safe operation of the equipment. Most haul road embankment slopes and adjacent areas have been mechanically stabilized and