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• addition to the Packrat Mine and Urantah Decline, the claim block includes all or portions <br />of the following mines: Bonanza, Lost Dutchman, Hubbard, Lumsden #2, Rajah 49, <br />Austin #4, and the Rajah 30. Ore production is derived from fluvial sandstones, mostly in <br />the upper part of the Salt Wash member of the Morrison Formation. <br />Historically, the uranium ore body was typically accessed through adits or tunnels driven <br />from the side of the canyon walls. Most of the previous mining operations included <br />construction of haul roads and dumping of waste rock along the sides of the canyon. The <br />Lost Dutchman Mine, which is an unreclaimed pre-law mine (i.e., mine that shut down <br />prior to the enactment of state and federal reclamation laws) is a good example of what <br />these older mines looked like during operation. The mine was accessed by a narrow road <br />along the edge of the canyon and waste rock was dumped directly into an ephemeral <br />drainage that flows into Lumsden Canyon. Umetco was able to successfully reclaim the <br />post-law canyon wall adits in the area along with associated roads and waste dumps in the <br />early 2000s; however, the steep terrain and surface drainage issues made this reclamation <br />• work challenging. <br />Energy Fuels evaluated the potential environmental impacts of various mining alternatives <br />in developing along-range mine plan for the claim block. This evaluation indicated that <br />potential impacts to soil, vegetation, water, and other natural resources could be <br />minimized by concentrating surface disturbing activities in the vicinity of the Urantah <br />Decline, where the topography is flatter and surface drainage can be controlled relatively <br />easily. This area became the focal point for the design of the Whirlwind Mine surface <br />facilities including primary access roads, buildings, ore stockpiles, waste rock disposal, <br />and surface drainage controls. Secondary access to the Packrat Mine portals was also <br />incorporated into the mine design to provide adequate mine ventilation and an emergency <br />escape way. Surface disturbance at the Packrat Mine, which is located on the side of <br />Lumsden Canyon, is limited to a narrow access road and small pad area. The Packrat area <br />will not be used for disposal of waste rock or primary ore haulage. <br />• <br />Whirlwind Mine 07 (rev. April 08) i-2 <br />