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/ D \ r , 0 9 5 A . J ] 4 ]1TER CORPORATION _ OX� AIRPORT ROAD <br /> (_� <br /> r' p U L A C �_L01 A 0 0 91A Ie <br /> Western Slope Operations x <br /> � N TE CD <br /> O: Don Little -1 <br /> FROM: Dick White <br /> DATE: January 19, 1995 <br /> SUBJECT: SR-11 (Ike #1 Mine) - Designated Mining Operation <br /> Introduction <br /> The following are some of my thoughts concerning the recent <br /> determination by the Office of Mined Land Reclamation that the Ike <br /> #1 Mine should be classified a "Designated Mining Operation. " <br /> Their statements that "toxic-forming materials will be <br /> exposed. . . to rain and snowmelt possibly causing offsite <br /> contamination" prompted me to do a review of a significant amount <br /> of published literature on sandstone vanadium-uranium deposits. <br /> Since the surface and near surface natural conditions are very <br /> complex and variable, few, if any, absolute conclusions can be <br /> drawn. Hence, it is necessary to use qualifying words such as <br /> mostly, generally, relatively, etc. repeatedly in any discussion of <br /> the geochemistry of vanadium-uranium deposits. <br /> The State also claims to have based its decision partly on a review <br /> of our permit application and recent inspection reports. Before <br /> addressing the pertinent geology and geochemistry, I offer a few <br /> comments on the past and proposed mine-related surface disturbance. <br /> Permit Applications and Inspections <br /> The permit, M-77-451, was a 110 category permit covering the old <br /> Ike No. 1 Mine in the SW; of section 8, T43N, R19W, that was <br /> converted to the 112 category to include the planned, but not yet <br /> begun, mine near the east ; corner in section 18 for the D.O.E. <br /> Lease Block SR-11 "Central Ore Body. " <br /> The permit map shows the location and maximum expected size of the <br /> proposed waste rock dump (10. 3 acres) . The toe of the dump will be <br /> on a relatively flat, south-sloping bench underlain by thin <br /> colluvium and weathered mudstone and sandstone of the basal part <br /> ofthe Brushy Basin member of the Morrison formation. This overlies <br /> the upper sandstone of the Salt Wash member of the Morrison which <br /> forms the bench between the Dakota formation capping the Brushy <br /> Basin slope to the northwest and the steep-walled Summit Canyon to <br /> the southeast. The bedrock here strikes about N30OW and dips only <br /> 1-20 SW. <br /> The map also shows, though not described in the mine plan, that a <br /> drainage ditch will be constructed to channel surface runoff from <br /> the north around the west side of the dump. This will limit rain <br /> and snow contact with waste rock to that precipitation which falls <br /> directly on the dump. <br />