Wheeler River Project

Denison Mines Corp. (Denison) is proposing to develop an in situ recovery uranium mining and processing operation located in the Athabasca Basin in northern Saskatchewan, approximately 600 km north of the city of Saskatoon, 4 km west of Highway 914 and midway between Cameco Corporation's Key Lake Mill and McArthur River Mine. The proposed Wheeler River mine would produce up to 5400 tonnes of U 3 O 8 annually for twenty years.

Under the Nuclear Safety and Control Act, Denison's proposal requires approval by the Canadian Nuclear Safety Commission (CNSC). An environmental assessment (EA) conducted under the Canadian Environmental Assessment Act, 2012 is required, and an EA decision affirming that the proposed activities will not cause significant adverse environmental effects, before the CNSC can make a licensing decision on this proposal.

This project is also subject to the environmental assessment requirements of the Government of Saskatchewan.


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.

Latest update

January 25, 2021: The Canadian Nuclear Safety Commission (CNSC) received notification from Denison Mines Corp. of the resumption of the Environmental Assessment for the Wheeler River Project as of January 01, 2021. The CNSC has also received a revised project description from Denison Mines Corp. for the Wheeler River Project. The revisions do not constitute material change to the project and therefore public consultation is not required.


Key documents

Key documents
Document Number Document Title File Date
14 Project Description - Wheeler River Project - Revised December 2020 PDF (15.5 MB) December 31, 2020
13 Letter from Denison Mines Corp. Notifying of the Restart of Environmental Assessment Activities for the Wheeler River Project PDF (164 KB) November 12, 2020
10 Letter from Denison Mines Corp. Regarding the Temporary Suspension of the Environmental Assessment for the Wheeler River Project PDF (227 KB) March 20, 2020
7 Decision on the scope of an environmental assessment of the proposed Wheeler River Project PDF (246 KB) December 20, 2019

List all records


Canadian Nuclear Safety Commission
Jes Way, Environmental Assessment Officer
280 Slater Street
Ottawa, Ontario K1P 5S9
Telephone: 343-540-6213 or 1-800-668-5284
Email: wheelerriver@cnsc-ccsn.gc.ca

  • Location

    • Russell Lake (Saskatchewan)
  • Nature of Activity

    • Nuclear Energy
    • Mines and Minerals
  • Assessment Status

    In progress
  • Start Date

  • Proponent

    Denison Mines Corp.
  • Authorities

    • Canadian Nuclear Safety Commission
  • Assessment Type

    Environmental assessment under CEAA 2012
  • Reference Number


Nearby assessments

..within 200 kilometres
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