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Uranium Development & Exploration

The Athabasca Basin

Wheeler River

Our Flagship Project

Denison has an effective 95% interest in the Wheeler River project, which ranks as the largest undeveloped uranium mining project in the infrastructure rich eastern portion of the Athabasca Basin region.

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Uranium Development & Exploration

The Athabasca Basin

Exploration Portfolio


Denison's exploration and development portfolio consists of numerous projects covering approximately 385,000 hectares in the Athabasca Basin region, with a focus in the infrastructure rich eastern portion of the Athabasca Basin.

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Uranium Development & Exploration

The Athabasca Basin

McClean Lake

Core Project

Denison’s 22.5% owned McClean Lake project is host to several unmined uranium deposits and the McClean Lake mill, which is one of the world’s largest uranium processing facilities, licensed to process up to 24M lbs U3O8 per year.

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Diversified Athabasca Basin Asset Base with Superior Development Leverage


  • 95% effective interest in flagship Wheeler River project – largest undeveloped uranium project in the infrastructure rich eastern Athabasca Basin
  • 22.5% interest in Strategic McClean Lake Uranium Mill, which has excess licensed annual capacity, and authorization for significant expansion of tailings management facility
  • 69.35% interest in emerging Waterbury Lake project, with Preliminary Economic Assessment stage development plans for the Tthe Heldeth Túé deposit (formerly J Zone).
  • Participating interests in key development-stage assets operated by uranium “majors”, including 22.5% in McClean Lake (Orano), 25.17% in Midwest (Orano), and an effective 15% in Millennium (Cameco) through 50% ownership of JCU (Canada) Exploration Company, Limited
  • 2.3M lbs U3O8 of physical uranium held in North American storage facilities – acquired at an average cost of US$29.66/lb U3O8, as a long-term investment expected to enhance access to future project financing for Wheeler River
  • ~385,000 hectares of prospective exploration ground in the Athabasca Basin

Investor Hub

Wheeler River Video

ISR Method

As of February 2021

Denison Mines Corp.

Denison is a uranium exploration and development company with interests focused in the Athabasca Basin region of northern Saskatchewan, Canada. Denison’s shares are listed on the Toronto Stock Exchange under the symbol “DML” and on the NYSE American under the symbol “DNN.” 

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Annual General Meeting

May 9, 2024

Denison's Closed Mines Operations

For its legacy mine operations in Elliot Lake, Ontario, Denison has completed decommissioning and restoration and is engaged in long-term monitoring, care and maintenance.

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