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D.4.3 Proposed Surface Disturbances <br />Activities at the mine site will consist of extending the existing Topaz Mine workings. The <br />anticipated affected area will expand from the existing 10.0 acres of affected lands to 17.8 acres <br />of affected lands. An additional 12.2 acres of proposed future disturbance is also included in this <br />permit conversion for undefined areas of future disturbance located within the permit boundary. <br />This allows for a total permitted disturbed area of 30.0 acres. In addition, the waste rock pile will <br />be expanded approximately 200 feet to the north. New roads and vent holes will be installed; this <br />will include four vent holes in the first 3 years of operation (%<-acre disturbance for each) and <br />approximately 2.75 acres of disturbance for associated access roads. During the life of the mine, <br />Denison will determine additional locations for vent holes within the permit boundary. Figure C- <br />3shows the proposed locations of five new vent holes (T2 through T6. These are general areas <br />where the vent holes will be located; however exact locations cannot be specified since the <br />locations must be sited to intersect the mine workings in areas where ventilation is required. <br />An expansion of the WItA will be required at the Topaz Mine portal area to support mining <br />operations. Archeological and biological resource surveys, in support of the National <br />Environmental Policy Act Environmental Assessment (NEPA EA), have been conducted for <br />areas of existing surface disturbance, and reports of findings are currently being prepared. <br />Archeological and biological surveys for areas of proposed future surface disturbance are <br />currently being conducted. For future disturbances in undefined areas within the permit <br />boundary, cultural and biological surveys will be completed prior to any surface disturbance. <br />Figures C-3 and C-4 show the proposed future disturbance associated with the expansion of the <br />affected area and the vent holes and access roads. These proposed facilities include the <br />following: <br />• Proposed expanded WRA <br />• Proposed topsoil stockpile area <br />• Ore stockpile area (OSA) <br />• Proposed catchment <br />• Modified drainage channels <br />• Modified/relocated berms <br />• Mine access roads <br />• Solid waste container/roll-off <br />5-1g-2007 Exhibit D Mining Plan D-fi <br />