Denison Secures Final Federal Licence and Board Approval to Build Canada’s First ISR Uranium Mine
Updated (3 articles)
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Board green‑lights Phoenix ISR construction and timeline Denison’s Board of Directors gave final investment approval on 25 Feb 2026, authorizing site preparation to begin the following month [1]. President and CEO David Cates said the two‑year build will target first uranium production by mid‑2028 [1]. The decision follows the Canadian Nuclear Safety Commission’s construction licence issued on 20 Feb 2026, which authorises site work through Feb 2031 [3].
Regulatory milestones complete after provincial approvals Saskatchewan’s environmental assessment for the Wheeler River project was approved in July 2025, and the province’s permits were secured earlier this year [1][3]. The CNSC licence represents the final federal step, allowing Denison to proceed with the Phoenix in‑situ recovery (ISR) mine and mill [3]. A separate operating licence will be required after construction, pending a future CNSC hearing [3].
Resource estimate confirms 70.5 million lb U₃O₈ at Phoenix Denison’s June 2023 update reported 30.9 million lb measured and 39.7 million lb indicated resources, totaling 70.5 million lb (27,118 tU) [1][3]. The Phoenix deposit, part of the Wheeler River project, is the largest undeveloped eastern Athabasca Basin uranium asset [1][3]. Joint‑venture ownership remains 90 % Denison, 10 % JCU (Canada) Exploration, with Denison as operator [1][3].
ISR technology introduces new mining method to Canada The Phoenix project will employ in‑situ recovery, a process that dissolves uranium underground and pumps the solution to the surface, accounting for over half of global uranium output [1][3]. Canada has never used ISR before, making the project a first for the country and prompting Denison to evaluate the technique at other sites such as Heldeth Túé and Midwest Main [1]. The method promises lower surface disturbance compared with conventional underground mining.
Paladin’s Patterson Lake South receives provincial environmental clearance On 18 Feb 2026, Saskatchewan’s Minister of Environment approved Paladin Energy’s Environmental Impact Statement for the shallow, high‑grade Patterson Lake South (PLS) project [2]. The approval enables Paladin to advance its underground mine and on‑site mill, which will process about 1,000 tonnes of ore daily and target a ten‑year mine life producing 90.9 million lb U₃O₈ [2]. A CAD 1.155 billion feasibility study projects a three‑year construction period, with further provincial and federal licences still required [2].
Sources
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1.
World Nuclear News: Denison Moves Ahead with Canada’s First In‑Situ Recovery Uranium Mine – Details board approval, construction schedule, resource estimate, and ISR method, emphasizing the project’s pioneering status in Canada .
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2.
World Nuclear News: Saskatchewan Approves Paladin’s Patterson Lake South Uranium Project – Reports provincial environmental approval, project scale, resource figures, and cost outlook, highlighting regulatory progress toward full licensing .
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3.
World Nuclear News: CNSC Issues Licence for Canada’s First In‑Situ Uranium Mine at Wheeler River – Confirms federal construction licence, regulatory timeline, joint‑venture structure, and resource data, noting the licence’s validity through 2031 .
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Timeline
2008 – Denison discovers the high‑grade Phoenix deposit in Saskatchewan’s eastern Athabasca Basin, laying the groundwork for what will become Canada’s first in‑situ recovery (ISR) uranium project [1].
2014 – Denison adds the Gryphon deposit to the Phoenix area, expanding the resource base that later totals over 70 million lb U₃O₈ [1].
2019 – The Canadian Nuclear Safety Commission (CNSC) begins the ISR permitting process for the Wheeler River project, marking the first federal review of an ISR mine in Canada [3].
April 2023 – Paladin Energy submits a construction licence application to the CNSC for the Patterson Lake South (PLS) underground mine and mill, moving the project toward regulatory approval [2].
June 2023 – Denison releases an updated resource estimate for Phoenix, reporting 70.5 million lb U₃O₈ (30.9 million lb measured, 39.7 million lb indicated) [1][3].
2023 – A NI 43‑101 feasibility study for PLS (originally by Fission Uranium) projects a three‑year, CAD 1.155 billion build, a ten‑year mine life and 90.9 million lb U₃O₈ production [2].
2024 – Paladin completes its acquisition of the Patterson Lake South project through the purchase of Fission Uranium, consolidating ownership of the high‑grade Triple R deposit [2].
June 2025 – Saskatchewan’s technical team formally accepts Paladin’s Environmental Impact Statement for PLS, clearing a key regulatory hurdle [2].
July – Sept 2025 – A public review period for the PLS EIS runs, featuring extensive Indigenous and community consultation [2].
July 2025 – Saskatchewan approves the provincial Environmental Assessment for Denison’s Phoenix ISR project, satisfying the final provincial requirement before federal licensing [1].
18 Feb 2026 – The Saskatchewan Minister of Environment grants formal approval of Paladin’s PLS Environmental Impact Statement, enabling the company to pursue provincial and federal construction licences [2].
20 Feb 2026 – The CNSC issues a licence authorising Denison to prepare the site and construct the Phoenix ISR mine and mill, completing the federal regulatory step required to begin construction [3].
23 Feb 2026 – Paladin announces that the PLS approval “aligns with Saskatchewan’s Growth Plan and safeguards,” emphasizing the project’s economic contribution and robust environmental review [2].
25 Feb 2026 – Denison’s Board of Directors green‑lights the Phoenix ISR project, scheduling site preparation to start in March 2026 and targeting a two‑year construction period [1].
25 Feb 2026 – CEO David Cates declares the board decision “a new era for Denison and Canadian uranium,” stating that Phoenix should reach first production by mid‑2028 [1].
Mid‑2028 (expected) – Phoenix ISR mine is slated to begin uranium production, positioning Denison among the few global suppliers with a sizable new source before the decade’s end [1].
Post‑construction (after 2028) – Denison must undergo a separate CNSC hearing to obtain an operating licence for Phoenix, a step required before commercial output can commence [3].
2026‑2029 (planned) – Paladin expects to commence a three‑year construction phase for the PLS underground mine and mill, after which a ten‑year production run will deliver up to 90.9 million lb U₃O₈ [2].
External resources (1 links)
- https://publications.saskatchewan.ca/#/products/128143 (cited 1 times)