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• produces typical mountain-valley wind patterns. Winds from the west occur during most of the day while weaker winds from the east occur at night. Bear Coal Company's air pollution control plan provides for control of fugitive dust by graveling and periodically watering We haul and portal access roads. Bear Coal Co. has installed a water sprsy system and has enclosed its coal handling facility to reduce fugitive dust. Geology -Rules 2.04.5 and 2.04.6(2 Information describing the geology of ffie permit area is presented in Sections 2.04.5 and 2.04.6 of the Bear No. 1 and 2 permit application, and Sections 2.04.5 and 2.04:6 of the Bear No. 3 permit revision application. Additional geological information is presented on the Regional Geology Map (Map 5), Geology Hydrology Map (Map 6), the Geologic Cross Section (Map '~, and Drill Hole Logs (Exhibit 8) of the Bear No.. 3 permit revision application. The mine is within the Paonia Coal Field. The rocks exposed in the Paonia Coal Field consist of the Marcos Shale and the coal-bearing Mesaverde Formation of Upper Cretaceous Age, the Ohio Creek Conglomerate, the Wasatch Formation of Early Tertiary Age, and a . quartz monzonite porphyry of Tertiary Age. (Figure 4) The Mesaver+de Formation is of Late • Cretaceous Age and conformably overlies the Marcos shale. This formation consists of approximately 2,500 feet of marine and terrestrial sedimentary rocks. The Mesaverde Formation is the coal-bearing formation in the region and is divided into four members. The members in order of decreasing age are the Rollins Sandstone, the Lower Coal Bearing (Bowie) member, the Upper Coal Bearing (Paouia) member, and the Barren (Undifferentiated) member. Three coal seams exist in the Lower Coal Bearing (Bowie) member, We A-Seam (Old King), the B-Seam (Somerset seam), and the C-Seam (Bear). The A-Seam is immediately above the Rollins Sandstone and is not currently mined. The B-Seam contains two coal canes and occurs about 20 to 120 feet above the Rollins Sandstone. This seam is mined at the Somerset Mine. The C-Seam occurs 50 to 100 feet above the B-Seam. This seam has been mined at U.S. Steel's Elk Creek Mine (currently the Somerset Mine), and the Bear No. 1 and 2 Mines, and is currently mined at the Bear No. 3 Mine. Three coal seams have been identified in the U r Coal ~~~~~ ppe (~ewre) member: the D-Seam (Oliver), E-Seam (Hawk's Nest), and the F-Seam. The D-Seam occurs directly above the massive sandstone of the Lower Coal Bearing member and contains three zones. This seam is currently being mined at the Orchard Valley Mine. The E-Seam occurs about 130 feet above the D-Seam and contains two coal zones. This seam was mined at the Hawk's Nest Mine, and the Blue Ribboe Mine. The E-Seam may be mined at the West Elk Mine and at the Bear No. 3 Mine in the future. The F-Seam contains two coal zones and is only mined • at the West Elk Mine. Coal seams of the F horizon do not exist to the north of the North Fork of the Gunnison River in thicknesses sufficient for mining.