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<br />Z Denison Mines (USA) Corp. ?co <br />l <br />- 1050 17th Street, Suite 950 <br />Denver, CO 80265 <br />_ <br />M, -n_,? USA <br /> <br />o / <br />•/ Tel : 303 628-7798 <br />Fax : 303 389-4125 <br />1 ?.? ?? www.denisonmines.com <br />February 6, 2009 ?`t? ?•, <br />? ?? <br /> <br />.del Bob Oswald <br />1 \i5? <br />_ <br />. <br />Department of Natural Resources <br />69 <br />1 County Road 233, Unit A2 <br />Durango, Colorado 81301 <br /> <br />Re: Request for Clarification on Environmental Protection Plan and Designated Mining Operation <br />Amendment Deadline <br />Dear Mr. Oswald: <br />Denison Mines (USA) Corp. ("Denison") received a determination letter of Designated Mining Operation status <br />for six Colorado Mines on February 8, 2008. The six mines identified as DMO are as follows: <br />• Topaz Mine (Permit M/1980/055 HR) <br />• St. Jude Mine (Permit M/1978/039HR) <br />• Carnation Mine (Permit M/1977/416) <br />• Sunday Mine (Permit MA 977/285) <br />• West Sunday Mine (Permit M/1981/021) <br />• Van 4 Mine (Permit M/1997/032) <br />On March 31, 2008, Denison sent a letter to the Division of Reclamation, Mining and Safety (the "Division") <br />requesting an extension of the regulatory 180 day time frame to 365 days, during which Denison will collect <br />data to complete the DMO process. In the same letter, Denison described a phased approach to the DMO <br />characterization plans and Environmental Protection Plan (EPP) preparation. Denison received an acceptance <br />letter from the Division on May 9, 2008 approving the 365 day time extension and the phased approach for <br />characterization and EPP preparation. On June 10`h, Denison received a letter from the Division stating that <br />there would be new requirements and that all uranium mines in Colorado would be DMOs. <br />To date, Denison has completed and submitted the following: <br />May 28, 2008 - Drainage Report for the Sunday Mines Group sent to the Division <br />August 5th - Waste Rock and Ore Characterization Plan submitted to the Division <br />August 18`h -22 nd - Collection of waste rock and ore samples from the Sunday Complex and Van 4 mines. <br />September 18`h - Groundwater Characterization Data Collection Work Plan sent to the Division <br />September 25`h - Received DRMS comments on Groundwater Characterization Plan and approval of Sunday <br />Drainage Report and Waste Rock and Ore Characterization Plan <br />December 10`h - Met with the Division in Durango to discuss preliminary results, progress, and schedule <br />December 15th - 19th - Installation of groundwater monitoring wells in underground mine workings