On Sept. 1, 2009, pursuant to Arizona Administrative Code (A.A.C.) and Arizona Revised Statutes the Arizona Department of Environmental Quality issued Air Quality Permit 46700 for the Arizona I Mine and Discharge Authorizations for the 3.04 General Aquifer Protection Permits (APP) 100300 for the Pinenut Mine and APP 100333 for Canyon Mine to Denison Mines (USA) Corp. The Arizona I, Pinenut and Canyon mines are all underground uranium mines. The Arizona I Mine and the Pinenut Mine are located approximately 35 miles south of the town of Fredonia and the Canyon Mine is located approximately 7 miles south of Tusayan. The public notice documents, final permits and supporting documents are below.

Public Notice Documents

• Public Notice
• Air Quality Fact Sheet
• Draft Air Permit # 46700 for the Arizona I Mine
• Draft Air Permit Technical Support Document for the Arizona I Mine
• Water Quality Fact Sheet for the Canyon Mine
• Draft Discharge Authorization for 3.04 General APP for the Canyon Mine
• Water Quality Fact Sheet for the Pinenut Mine
• Draft Discharge Authorization for 3.04 General APP for the Pinenut Mine

Final Permit Documents

• Responsiveness Summary to Public Comment
• Environmental Justice Assessment
• Final Air Quality Permit
• Final Air Quality Technical Support Document
• Water Quality Fact Sheet for the Canyon Mine
• Final Discharge Authorization for 3.04 General APP for the Canyon Mine
• Water Quality Fact Sheet for the Pinenut Mine
• Final Discharge Authorization for 3.04 General APP for the Pinenut Mine
• Map of the Arizona I, Pinenut and Canyon Mines

When operational, the Arizona I mine is expected to extract 109,500 tons per year (tpy) of uranium ore. The extracted uranium ore is removed via haul trucks and transported for further processing at a mill in Blanding, Utah.

With the issuance of the air quality permit for the Arizona I Mine, Denison Mines has all the necessary environmental permits to begin operations.

The Canyon and Pinenut Mines both will require Air Quality and will likely require additional Aquifer Protection Permits before they will be allowed to operate.

For more information, please contact:

Trevor Baggiore, Manager
ADEQ Air Quality Permits Section
(602) 771-2321 or, toll free, at (800) 234-5677