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RULE 2 PERMITS <br />Domestic livestock grazing will not commence until at least one year after seeding and shall be <br />managed to promote the post-mining land use. The grazing will be managed in such a manner so as to <br />not interfere or preclude the post-mining vegetation sampling as required in Section 4.15.8. <br />2.05.6 Mitigation of Surface Mining Operation Impacts Air Pollution Control Plan <br />Colowyo maintains fugitive dust control measures as an integral part of all mining and reclamation <br />activities. Presently, Colowyo operates under numerous Emission Permits issued from the Colorado <br />Department of Health, Air Pollution Control Division, as more particularly described in Section 2.03.10. <br />Copies of all applicable emission permits issued by the Colorado Department of Health are contained in <br />Exhibit 8, Air Quality Information. Colowyo conducts air quality monitoring at the site in accordance <br />with the requirements of the emission permits. <br />The principal fugitive dust control practices employed by Colowyo are as follows: <br />Roads <br />Colowyo employs a dust suppression program for in pit roads and other unpaved roads which primarily <br />involves periodic watering. Mine water trucks run periodically as needed over the roads wetting down any <br />dusty conditions. During the dryer months of the year, the water trucks will wet down the roads which are <br />being utilized a minimum of two or three times per shift. If determined to be necessary as an addition to <br />periodic watering, a chemical dust suppression agent may be used during the dry months on the primary <br />in pit roads. To this date, however, chemical stabilization of the unpaved in pit roads has not been <br />successful for more than a short period of time due to changing weather conditions and the use of heavy <br />haulage trucks. <br />Colowyo has surfaced "in-pit" roads with gravel or crushed rock; however, no roads in the pit area will be <br />paved with asphalt. Asphalt could not sustain the enormous weights of the haulage equipment currently in <br />use. Likewise, crawler equipment would rip the asphalt surface causing an extremely hazardous condition <br />for all equipment and personnel. All roads in the mining operation will be constantly maintained by a <br />motor grader, scraper, or rubber tired dozer to remove any coal, rock, or any other debris. Smooth and <br />clean road surfaces are essential for not only minimizing dust, but also for allowing efficient, safe and <br />economic use of haulage equipment. <br />The haul roads have been paved with asphalt to provide for emission control. The paved roads include <br />approximately five miles of road from State Highway 13/789 to the main office building, the road from <br />the main office building to the Gossard coal loadout, and the road from the shop facility to the Gossard <br />coal loadout. <br />A strict speed control will be implemented for all roads to control dust and to provide for safe operation <br />of the equipment. <br />Most haul road embankment slopes and adjacent areas have been mechanically stabilized and seeded with <br />a mixture shown in Table 2.05-7, Reclamation Seed Mixture. Mechanical stabilization has consisted of <br />furrowing, chiseling, "cat tracking" and mulch, depending on accessibility to the slopes. <br />No travel of unauthorized vehicles will be allowed on anything other than established roads. All <br />overburden haulage equipment will be restricted only to appropriate roads. <br />Colowyo does not plan to cover any of the haul trucks because the roundtrip between the coal crushing <br />facility and the active mining area will be relatively short, and the loaded trucks will be moving slowly. <br />Rule 2 Permits 2.05-34 Revision Date: 6/23/08 <br />Revision No.: MR-91