Laserfiche WebLink
/• <br />decline is dry and the material will not be in contact with ground or meteoric water. The calculated <br />volume of pad material is 2,820 cubic yards. The liner consists of overlapping strips of GCL. These <br />strips will be dragged into the mine with a chain and buggy and left in the upper part of the decline. <br />The sludge collected in the Treated Water Settling Tank will be disposed of in either one of two ways: <br />1) mixed into a cement grout on site and disposed of in the mine in a designated area or 2) taken to the <br />uranium mill with ore to be processed. The later disposal method is preferred as it allows for <br />maximum utilization of the resource; however, this option may not always be available. For <br />reclamation costing purposes, disposal in the mine is assumed. As discussed in Appendix H, the sludge <br />is expected to contain low levels of radionuclides and metals that do not require disposal as a <br />radioactive or hazardous waste. <br />The sludge volume is estimated to be approximately 19 cubic yards as discussed in Appendix H. The <br />sludge will be slurried into a grout pump where cement will be added to form a cement grout that will <br />be pumped into the upper portion of the decline using the existing waterline. The grout will be placed <br />• on top of or next to the ore pad material. The volume of slurried grout is expected to be about 40 cubic <br />yards. <br />5. Reclaim Ventilation Shafts and Power Drops <br />As explained in Section 16 of Exhibit D -Mine Plan, two ventilation shafts will be located in <br />Colorado. Up to six other shafts may be present in Utah, which will be permitted under a NOI to <br />Commence Small Mining Operations (i.e., 5 acres or less disturbance) with the Utah Division of Oil, <br />Gas and Mining. All new shafts will be grouted where they intercept aquifers so that they do not <br />provide a conduit for ground water flow. <br />There are a number of methods available for sealing a vent shaft at the surface including the use of <br />foam, concrete, metal, and/or combination thereof. Seal designs will be provided to the DRMS and <br />BLM at the time of closure for their review and approval. For reclamation costing purposes, the <br />following traditional reinforced metal and concrete design is assumed. <br />• <br />Whirlwind Mine 07 (rev. April 08) E-5 <br />