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dENISONI) <br />MINES <br />January 20, 2009 <br />Bob Oswald <br />Department of Natural Resources <br />691 County Road 233, Unit A2 <br />Durango, Colorado 81301 <br />Bob Oswald: <br />Re: Topaz Mine Temporary Cessation (Permit Number M/1980/055HR) <br />Denison Nina (USA) corp. <br />105017th Street; Suite $50 <br />Denver, CO $0255 <br />USA <br />TN : 303.28-TM <br />Fax : 303 M-4125 <br />www.denisonmine&com <br />Under Title 34, Mineral Resources, Article 32, Colorado Mined Land Reclamation Act for Hard Rock, Metal <br />and Designated Mining Operations, temporary cessation is described as follows: <br />Temporary Cessation: means those limited periods of non-production as specified according to Section 1.13. <br />Section 1.13 states: <br />Temporary cessation occurs when there are no personnel working at the site for one hundred eighty <br />(180) consecutive days. This excludes security personnel and personnel conducting maintenance or <br />housekeeping, or related activity. This also excludes individuals who are not considered to be engaged <br />in activities which are not significantly moving the site towards completion of the mining operations. <br />We are only required to notify the Division in writing after 180 days or more. Temporary cessation can <br />last for 5 years and can be renewed for an additional 5 years after that period (10 years total). <br />The Topaz Mine was placed under temporary cessation on July 31, 2009. This letter is intended to notify you <br />that active mining has ceased at the above referenced mine and the mine has been placed on temporary <br />cessation. If you have any questions or concerns, please feel free to contact me at 303.389.4136 or <br />coodward@denisonmines.com. <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, Dave Frydenlund, Philip Buck, Denison Mines (USA) Corp.