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<br />• <br />1.0 Description of the Ore Sorter <br />In March, 1976, Cotter Corporation began a uranium ore sorting operation <br />immediately adjacent to the Schwartzwalder Mine in the SE 1/4 of Section 25, T2S, <br />R71W, 6th P.M., Jefferson County. (See Figures 1.1-1 and 1.1-2) <br />The ore at the Schwartzwalder mine is generally described as that which <br />contains pitchblende vein minerals of a thorium poor variety. The host rock at the mine, <br />with a density of about 2.8 grams per cubic centimeter, occurs for an additional. <br />four to five miles south of the mine in Golden Gate Canyon. <br />The impetus to operate the ore sorter is reduction of the quantity and <br />cost of ore haulage from the Schwartzwalder Mine to the Cotter mill in Canon City. <br />Transportation of the ore is by truck, and the over-the-road distance is 130 miles. <br />The ore sorter conveys non-ore grade rock to a sorter reject stockpile, adjacent <br />to the sorter plant, thereby reducing significantly the volume of non•-ore grade <br />• material shipped to the mill. Sorter reject material is ultimately dcaposited <br />with the Schwartzwalder Mine waste rock where it is managed pursuant i;o a plan <br />approved by the Colorado Mined Land Reclamation Board. Additional benefits <br />derived from the ore sorting operation include: reduced nonproductive wear and <br />tear on the mill crushing/grinding and processing circuit; reduced costs of <br />chemicals at the mill; and reduced tailings volume subject to management, <br />reclamation, long-term stabilization and surveillance. <br />The ore sorter was designed by and purchased from Ore Sorters (Canada), <br />Limited, and has the following general characteristics: <br />Area: The building proper has a ground floor area of 62 ft. north <br />to south by 50 ft. east to west fora total of 3,100 square <br />feet. <br />Height: The building proper can be considered as two trapezoidal <br />structures placed together in an East-West orientati~m. <br />. The building height ranges from 39.5 ft. to 75.5 ft. <br />