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zones. These drifts will have nominal dimensions of nine feet high by twelve feet wide. The 600 to <br />• 700-foot proposed drift between the Whirlwind Tunnel and the Packrat Mine will be started first <br />and maybe completed under the bulk sampling provisions of the prospect permit. A portion of the <br />existing southern drift of the Packrat Mine will also be enlazged to accommodate modern rubber- <br />tired mine equipment. <br />As the mine expands, seven ventilation shafts will be added as shown on Map C-1B. The location of <br />these vent shafts may change by several hundred feet depending on the ultimate location of the drift <br />and ventilation needs. The ventilation shafts will typically be 72 inches in diameter and cased; <br />however, shaft diameters may vary depending on the drill contractor's equipment. The steel casing <br />will be grouted where it passes through aquifers to prevent intermixing of waters between <br />formations. <br />The ore zone does not naturally contain ground water at this location; however, ground water is <br />seeping into the Whirlwind mine from aquifers located above the mine workings. This water is <br />entering the mine where the Whirlwind decline intersects sandstone lenses near the base of the <br />• Brushy Basin member. Ground water is also entering around the casing of the Ten Straight vent <br />shaft into the Packrat Mine and through open drill holes and fractures in the formation. Initially, <br />Energy Fuels will need to pump water out of the mine because water has collected in low areas of <br />the mine during the past fifteen to twenty-five yeazs. This water will be treated prior to being <br />dischazged to a neazby ephemeral drainage. Once the mine is operating, the water flowing into the <br />mine will be used in mining operations for drilling and dust suppression. Energy Fuels has applied <br />for a water right to use this water. As discussed in Exhibits G and T, mine water dischazge will not <br />be required or will only be needed intermittently during active mining operations. <br />Energy Fuels plans to implement a program for minimizing ground water inflows into the mine <br />workings. This will include evaluating the seepage azound the casing of the Ten Straight vent shaft <br />and grouting the casing to plug off or reduce water inflows. Historic drill holes encountered during <br />mining that aze open and producing water will also be plugged or grouted. It is believed that this <br />will reduce the amount of water entering the ore bearing zone from above thus preserving some of <br />this water in the upper aquifers while lessening the amount of water that will be treated at the <br />• <br />Whirlwind Mine July 07 D-4 <br />