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dENISONI)II <br />MINES <br />Recow" <br />June 29, 2010 JUL 15 2010 <br />DiAAR of RscN n, <br />LftfMp a"d IW* <br />Bob Oswald <br />Division of Reclamation, Mining and Safety <br />691 County Road 233, Room A-2 <br />Durango, Colorado 81301 <br />Dear Mr. Oswald: <br />0 ?90 ,c ?40 <br />Denison Mines (USA) Corp. <br />105017th Street, 3ulte 930 <br />Denver, CO 80265 <br />U3A <br />Tel : 303 628-7998 <br />Fax : 303 389-4125 <br />www.denisonmines.com <br />Re: Response to review comments on Carnation Mine, Permit No. M-1977-416, Temporary Cessation <br />(Revision TC-2). <br />In your review letter, dated June 1, 2010, you requested that Denison provide information as to structure <br />stabilities of the topsoil stockpile, portal entry, buildings, storage tanks, and electrical supply structures. No Ore <br />or low-grade material exists on the surface as also illustrated in the attached photos. <br />Denison continues to work with the BLM on the Environmental Assessment process for some proposed vent <br />holes and exploration drilling; however environmental characterization activities as a part of this process are not <br />likely to fall under DRMS's definition of mining. Denison will continue to keep DRMS informed of any <br />activities associated with this process. <br />Please feel free to contact me directly if you have additional questions or comments. <br />Yours very truly, <br />DENISON MINES (USA) CORP. <br />Christy Woodward, PE <br />Environmental Coordinator <br />Cc: Denison Mines (USA) Corp., File <br />Terry Wetz, Philip Buck, Denison Mines (USA) Corp. <br />Jamie Sellar-Baker and James Blair, US Bureau of Land Management