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V <br />~~ dENISON~ ~s~ ~ ~~: <br />MINES <br />May 18, 2007 <br />~1 J Bob Oswald <br />i Department of Natural Resources <br />~~~5 State of Colorado 701 Camino Del Rio, Room 125 <br />Durango, Colorado 81301 <br />Bob Oswald: <br />,~ <br />Re: Conversion of the Topaz 1 <br />~~~Ne <br />d <br />r,,.r <br />~r2'2po~/ <br />at; <br />~: ~. <br />~(~,.. ~~~%t$ <br />~~ <br />Denison Mines (USA) Corp. ~J ~ <br />105017th Street, Suite 950 41~~ <br />Denver, CO 80265 VV <br />USA <br />Tel :303 628.7798 <br />Fax :303 3844125 <br />www.den isonm ines.com <br />/~U !0 ~l1 ~ l <br />~ ,/7 <br />C' w <br /> <br />The existing Topaz Mine Reclamation (l 10) Permit, submitted to the Colorado Division of Reclamation, <br />Mining and Safety (DRMS) includes 9.9 acres of surface disturbance. Denison Mines (USA) Corp. intends to <br />expand operations at the Sunday Mine by expanding the waste rock dump and adding 5 additional vent holes <br />within the proposed permit boundazy. These proposed expansion activities will increase the affected area to <br />17.8 acres. <br />Additional vent holes will be required to support future operations at the mine; however, the location of these <br />vent holes is currently undetermined. An additional 12.2 acres of disturbed azea is requested on this permit to <br />raise the total permitted area to 30.0 acres. Submittals will be provided to DRMS on a notice level basis for <br />approval prior to any surface disturbing activities within the Topaz Mine permit boundary. <br />Enclosed aze two copies of the conversion application, updated figures showing proposed surface disturbance <br />(new), and amended exhibits. The fee for a permit conversion ($1500.00) is also enclosed. <br />As noted in the attached application materials, preparation of a reclamation estimate for the additional affected <br />areas has been deferred to DRMS. In addition, there is one existing vent hole at the Topaz Mine that was <br />recently installed under a notice of intent with cone-site exploration bond. These costs will need to be <br />incorporated into the new reclamation estimate and subsequent bond for the Topaz Mine. <br />Please call me with any questions or concerns (303) 389.4136. <br />Sincerely, <br />DENISON MINES (USA) CORP. <br />C~ ~nd~a-d <br />Christy Woodwazd, PE <br />Environmental Engineer <br />CC: Denison File <br />Terry Wetz, Denison Mines (USA) Corp. <br />Enclosure. <br />