Denison Mines Corp. engages in the exploration, development, mining, and milling of uranium primarily in the United States and Canada. It also produces vanadium as a co-product from its mines located in Colorado and Utah; and recycles uranium-bearing waste materials. The company's principal properties in the United States include the Arizona Strip uranium properties in north central Arizona; the Colorado Plateau uranium/vanadium properties located to the southwestern Colorado and southeastern Utah border; the Daneros mine and exploration properties in the White Canyon district in southeastern Utah; and the Henry Mountains Complex uranium properties in south central Utah. Its primary properties in Canada comprise the Midwest uranium project, the Wheeler River project, the Moore Lake property, the Park Creek property, the Wolly project, and various other wholly owned and joint ventured exploration properties located in Saskatchewan. The company also owns interest in gold prospect at Talbot Lake in Ontario. In addition, it holds interests in 181,574 hectares of uranium exploration properties in Mongolia; and 2 mining licenses totaling 457,300 hectares in the southern part of Zambia. Further, the company provides post-closure mine care and maintenance services, as well as mine decommissioning services to industry and government. Denison Mines Corp. sells its vanadium as a vanadium pentoxide and as a ferrovanadium to industry end users and trading companies. The company was formerly known as International Uranium Corporation and changed its name to Denison Mines Corp. in December 2006. Denison Mines Corp. was founded in 1996 and is headquartered in Toronto, Canada.