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 12 million pounds of  uranium concentrate (U 3 O 8) annually for fifteen 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.

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Latest update

November 19, 2025 - The detailed hearing schedule for Part 2 of the Wheeler River Hearing has now been released. The proceedings with run from December 8th to 11th, as detailed here: https://iaac-aeic.gc.ca/050/documents/p80178/163882E.pdf


November 8, 2025 - Minor corrections to the EA Report have been posted. The french translated version of this report has also been posted


October 2, 2025 - The hearing agenda for part one of the Wheeler River has been posted.

The agenda includes a presentation from Denison as well as a presentation from CNSC staff. The presentations provide details on the licensing and environmental assessment processes and related technical details. Consultation and engagement topics won’t be discussed until the Part 2 hearing, the week of December 8th where interventions will be heard.

If you are interested in watching the Part 1 hearing on October 8th, the link is included in the agenda and can be found here: Watch Commission proceedings live.

If you wish to intervene in part two of the hearing, requests to intervene must be filed with the Commission Registry by October 24, 2025. Participants may provide their intervention in writing, or with a written submission to be accompanied by an oral presentation. Oral presenters who wish to use a PowerPoint presentation are asked to submit their slide decks to the Commission Registry by November 24, 2025. Additional information on this process can be found here: Notice of Public Hearing and Participant Funding - 2025-H-09.

Part two of the hearing of scheduled for the week of December 8th, but exact dates are still TBD.


August 20, 2025 - On August 19 the Canadian Nuclear Safety Commission (CNSC) has posted the Environmental Assessment (EA) Report for Denison Mines Corp.’s proposed Wheeler River Project. The EA Report is part of the Commission Member Document (CMD) package related to Denison’s licence application to prepare site and construct.

The EA Report presents CNSC staff’s assessment of the potential environmental effects of the proposed in-situ recovery uranium mining project located in northern Saskatchewan. It reflects a technical review conducted by the Federal Indigenous Review Team and incorporates input received from Indigenous Nations and communities, federal departments and agencies.

The EA Report evaluates whether the project is likely to cause significant adverse environmental effects, taking into account proposed mitigation measures and the implementation of follow-up programs.

The EA Report and supporting documents are available here:

The EA Report will be considered by the Commission during a public hearing. Details on the hearing, including how to participate or submit written interventions, will be announced on the CNSC website and the Registry in the coming weeks.

For more information, contact the CNSC Wheeler River Project Team at WheelerRiver@cnsc-ccsn.gc.ca.


March 6, 2025 - On February 27, 2025, the Canadian Nuclear Safety Commission (CNSC) announced hearing dates for a public hearing on Denison Mines Corporation's licence application to prepare a site for and construct its Wheeler River mine and mill project. The hearing will also consider the Environmental Assessment, under the Canadian Environmental Assessment Act, 2012.

Hearing details:

Part 1:

  • Date: October 8, 2025
  • Place: To be determined (National Capital Region and/or virtually via zoom)
  • Time: As set by the agenda to be published prior to the hearing date Date

Part 2:

  • Date: Week of December 8, 2025
  • Place: To be determined (Saskatoon)
  • Time: As set by the agenda to be published prior to the hearing date

More information can be found in the CNSC's public notice here: https://api.cnsc-ccsn.gc.ca/dms/digital-medias/Notice-of-Public-Hearing-and-Participant-Funding-2025-H-09.pdf/object


February 3, 2025:

The Canadian Nuclear Safety Commission (CNSC) is offering participant funding to assist Indigenous Nations and communities, members of the public and interested parties in reviewing the environmental assessment (EA) and licence application for Denison’s Wheeler River Project and in participating in a future Commission hearing process. The Commission has not yet announced any details, such as date or location, for a hearing on Denison’s application. 

This participant funding opportunity is open from February 3 to April 4, 2025. For details on how to apply, please see the original posting here: www.cnsc-ccsn.gc.ca/eng/the-commission/participant-funding-program/opportunities/2025-02-denison/ 


 

Participate

Key documents

Key documents
Document Number Document Title File Date
209 Commission Member Document 25-H9 CNSC Staff Submission (including Indigenous Consultation Report) PDF (11.4 MB) August 20, 2025
207 Environmental Assessment Report - Wheeler River Project PDF (7.5 MB) August 20, 2025
202 Responses from CNSC: Consolidated Comments from Indigenous Nations and Communities and the Public on the Wheeler River Draft EIS PDF (422 KB) January 10, 2025
197 CNSC to Denison - Wheeler Project - Acceptance of the Final EIS and Supporting Documents PDF (141 KB) December 24, 2024
200 Commitments Register Version 5 - Wheeler River Final EIS Submission (2024-12-23) PDF (1 MB) December 23, 2024
133 Wheeler River Project: Final Environmental Impact Statement PDF (62.7 MB) December 23, 2024
203 Responses from Denison: Consolidated comments from Indigenous Nations and Communities and the Public on the draft environmental impact statement (EIS) for the proposed Wheeler River Project PDF (4.6 MB) November 22, 2024
196 Combined appendices Final EIS PDF (381.9 MB) November 22, 2024
139 IER Appendix B - Wheeler River Final EIS Submission (2024-11-22) PDF (274.5 MB) November 22, 2024
138 Indigenous Engagement Report (IER) - Wheeler River Final EIS Submission (2024-11-22) PDF (6.2 MB) November 22, 2024
134 Wheeler River Project: Executive Summary for the final EIS PDF (14.3 MB) November 22, 2024
146 Northern Village of Pinehouse letter of support for Wheeler River Project PDF (121 KB) June 25, 2024
145 Kineepik Metis Local Inc. letter of support for Wheeler River Project PDF (160 KB) June 25, 2024
144 Northern Village of Beauval letter of support for Wheeler River Project PDF (126 KB) April 23, 2024
143 Northern Hamlet of Ile-a-la Crosse letter of support for Wheeler River Project PDF (38 KB) April 22, 2024
142 Northern Hamlet of Jans Bay letter of support for Wheeler River Project PDF (138 KB) April 22, 2024
141 Northern Hamlet of Cole Bay letter of support for Wheeler River Project PDF (363 KB) April 19, 2024
140 English River First Nation Consent Letter to CNSC for Wheeler River Project PDF (28 KB) September 27, 2023
83 Annex 2 - FIRT Advice to Proponent for the Wheeler River Project Draft EIS PDF (505 KB) March 20, 2023
82 Annex 1 - Information Requests for the Wheeler River Project draft EIS PDF (1.5 MB) March 20, 2023
81 Cover Letter - CNSC to Denison Results of the Federal Indigenous Technical Review of the Wheeler River Project Draft EIS PDF (225 KB) March 20, 2023
67 Wheeler River Project: EIS Executive Summary Poster - Dene Version PDF (845 KB) January 13, 2023
66 Wheeler River Project: EIS Executive Summary Poster - Cree Version PDF (945 KB) January 13, 2023
14 Project Description - Wheeler River Project - Revised December 2020 PDF (15.5 MB) December 31, 2020

Contacts

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


Disclaimer

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.

  • Location

    • Russell Lake (Saskatchewan)
  • Nature of Activity

    • Nuclear Energy
    • Mines and Minerals
  • Assessment Status

    In progress
  • Start Date

    2019-05-31
  • Proponent

    Denison Mines Corp.
  • Authorities

    • Canadian Nuclear Safety Commission
  • Assessment Type

    Environmental assessment under CEAA 2012
  • Reference Number

    80178

Nearby assessments

...within 200 kilometres
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