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1 <br />MINREC, INC. - NORTH THOMPSON CREEK MINES <br />' STORM WATER MANAGEMENT PLAN - INACTIVE MINES <br />1. Description of Mining Activities <br />' The North Thompson Creek Mine is a reclaimed underground coal <br />mining operation. The mine was recontoured and seeded with <br />native grasses and shrubs during 1986 and 1987. All support <br />' buildings and facilities were removed from the site during <br />1986 and 1987. There is an access road to the reclaimed area, <br />three sediment ponds and three water treatment ponds on the <br />' site. <br />The North Thompson Creek No. 1 Mine was operated more or less <br />' continuously from the 1950's through 1984. The modern era of <br />mining began in the late 1970'x. Coal was mined by longwall <br />methods beginning in 1981. Coal was delivered to the surface <br />with belt conveyors. The coal was washed in a modern coal <br />' wash plant and then transported off the site with highway type <br />trucks. <br />' The activities that occurred at the North Thompson Creek No. <br />1 Mine included, stockpiling and washing of coal, water <br />treatment, sewage treatment in lagoons, warehousing, material <br />storage and maintenance. Diesel fuel and gasoline were stored <br />' in above ground tanks. waste from the coal washing process <br />was disposed of at the site refuse area. <br />' The No. 3 Mine is located approximately 0.4 miles west of the <br />No. 1 Mine. The No. 1 Mine is located south of North Thompson <br />Creek and the No. 3 Mine is located north of North Thompson <br />' Creek. Mining in the No. 3 Mine occurred during the same time <br />frame as the No. 1 Mine. During the modern era of mining in <br />the No. 3 Mine, coal was transported to the No. 1 Mine by an <br />overland conveyor. The activities that occurred on the No. 3 <br />' Mine site were limited to material storage and maintenance. <br />The mines are located approximately 10 miles southwest of <br />' Carbondale, Colorado on North Thompson Creek Road. The Denver <br />& Rio Grande Western Railroad Company has a mainline track <br />that terminates near Carbondale. <br />' The surface permit area encompasses 320 acres. A total of 43 <br />acres were disturbed. <br />' 2. Site Mao <br />The site map is enclosed. <br />t 3. Description of Potential Pollutant Sources/Material Inventory <br />a. No materials are stored or have been disposed of in a <br />' manner to allow exposure to stormwater discharge. <br />1 <br />