DNN advances Phoenix ISR uranium mine after approvals, targeting 2028 production and aiming to deliver low-cost supply as global uranium markets tighten.
Denison Mine Corp. DNN has taken a final investment decision following the receipt of all regulatory approvals to proceed with the construction of its Phoenix in-situ recovery (ISR) uranium mine. With first production targeted for mid-2028, it is expected to be Canada’s first ISR uranium mine, marking a pivotal shift in the country’s uranium mining landscape.
Denison holds a 95% effective interest in the Wheeler River project, the largest undeveloped uranium project in the infrastructure-rich eastern Athabasca Basin. It comprises two deposits, Phoenix and Gryphon (which is in the development stage). Phoenix is designed as an ISR operation, while Gryphon is a conventional underground mining operation. Both deposits have the potential to be competitive with the lowest cost uranium mining operations in the world.
Phoenix hosts an estimated 70.5 million pounds of uranium at an average grade of 11.4%. Notably, Phoenix was ranked the #1 non-precious mining development project globally in 2025 by Mining Journal Intelligence.
Construction at Phoenix commenced in March 2026 and has an estimated timeline of roughly two years. The initial capital expenditure is projected at approximately $600 million. Denison is well-positioned to fund development, supported by a strong balance sheet that included roughly CAD$718 million in cash, physical uranium holdings and investments at the end of 2025.
From a production standpoint, Phoenix is expected to deliver a meaningful uranium supply at a time when global markets are tightening. The project boasts strong economics, including low operating costs of around $6.28 per pound and all-in sustaining costs at $18.41 per pound, placing it firmly within the lowest cost quartile globally.
With an estimated 10-year mine life, it is expected to generate robust cash flows for Denison, which could support the development of the Gryphon project.
ISR mining involves extracting uranium by injecting a solution into the orebody to dissolve the mineral and pump it to the surface. Compared with conventional mining, ISR offers advantages such as lower capital and operating costs, shorter development timelines and reduced environmental impact. While widely used in regions such as the United States and Kazakhstan, it has not previously been used for commercial uranium operations in Canada.
Corpus Christi, Texas-based Uranium Energy UEC employs ISR mining technology at its fully licensed projects, including Palangana, Burke Hollow, Goliad and Reno Creek uranium projects.
Ur-Energy URG, another U.S. uranium mining company, is focused on developing and operating in-situ recovery (ISR) uranium projects in Wyoming, which include the Lost Creek ISR uranium project and the Shirley Basin Project.
Canada-based Cameco CCJ uses ISR methods at its uranium operations in the United States and Kazakhstan.
Denison Mines shares have gained 181.6% in a year compared with the industry’s 46.7% growth.
Image Source: Zacks Investment Research
DNN is trading at a price/book multiple of 12.52X, a significant premium to the industry’s 1.66X.
Image Source: Zacks Investment Research
The Zacks Consensus Estimate for Denison Mines’ fiscal 2026 earnings is a loss of five cents per share. The 2027 estimate is at a loss of four cents per share.
The earnings estimates for DNN for both years have moved up over the past 60 days. This is shown in the chart below.
Image Source: Zacks Investment Research
The company currently sports a Zacks Rank #1 (Strong Buy).
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