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DENISON MINES (USA) CORP. <br />2010 ANNUAL REPORT <br />Sunday Mine - M-1977-285 <br />The Sunday Mines resumed operations in May 2007. The Sunday Mine was placed on temporary <br />cessation status on November 30, 2009. The mine remains in temporary cessation at this time. <br />In March of 2008, the Division provided notification to Denison Mines that the Sunday Mine is a <br />Designated Mining Operation. A proposed Environmental Protection Plan (EPP) was completed in May <br />of 2009 and the Division provided Denison comments in August of 2009 and again in January of 2009. <br />These comments have been addressed and a revised EPP has been submitted to the Division as of the date <br />of this report. <br />This EPP includes the results of the material characterization, drainage report, surface water, and ground <br />water evaluations. <br />Exploration drilling occurred in the spring and summer of 2009 and a total of 60 exploration drill holes <br />were completed, closed, and reclaimed. These holes were inspected in November 2010 and additional <br />seeding was completed at this time in areas where additional revegetation is not yet adequate. Additional <br />drilling is planned following satisfactory resolution of the US Bureau of Land Management (BLM) <br />remand and lifting of the current stay. Any drilling in 2011 will require BLM and DRMS approval. <br />A Weed Management Plan consistent with the requirements of San Miguel County and the BLM was <br />prepared for the Sunday Mines. Noxious weed control was conducted using pesticide for halogeten and <br />knapweed. Figures provided in the 2008 Annual Report show areas where pesticides are applied at the <br />Sunday Mines. Pesticides were applied in 2010 on May 16th, 17`h, and 28th. A Pesticide Application <br />Record (PAR) as submitted to the BLM on December 6, 2010 was also provided to DRMS at that time. <br />All work completed at the Sunday Mine in 2010 has been completed in conformance with approved <br />Division Mine Permits and Plans of Operation with the BLM. <br />No changes occurred in the Permit M-1977-285 area during the past year. Routine stormwater <br />inspections are ongoing as required by Denison's stormwater discharge permit with the Colorado <br />Department of Public Health and Environment (CDPHE). Routine maintenance was documented and <br />reported to CDPHE in the annual reporting required by the Colorado Discharge Permit held by Denison. <br />Updated mapping for the Sunday Mine was provided with the EPP submittal, and no changes have <br />occurred at the sites since this time.