Canada Starts Construction of Major New Uranium Mine

Canada has begun full-scale construction of the Phoenix uranium mine in northern Saskatchewan, marking an important development in the global effort to expand and diversify the supply of nuclear fuel.

Denison Mines announced on 28 July 2026 that the project had moved beyond site preparation into full construction. Work now includes installation of the first phase of a perimeter freeze wall, development of the wellfield, site civil works and preparations for foundations for the processing plant and electricity infrastructure. The company says more than 20% of the overall site civil works have been completed.

Phoenix is significant not simply because it is another uranium project. It is the first large-scale Canadian uranium mine to receive federal construction approval in more than two decades and is intended to become Canada’s first commercial uranium operation based on in-situ recovery, or ISR.

For African uranium-producing and uranium-prospective countries, the project offers important lessons about regulatory capacity, environmental oversight, mine financing, community participation and the changing international competition for nuclear-fuel investment.

From regulatory approval to construction

The Phoenix deposit forms part of the Wheeler River project in the uranium-rich Athabasca Basin, approximately 600 kilometres north of Saskatoon.

In February 2026, the Canadian Nuclear Safety Commission issued Denison Mines a licence authorising site preparation and construction. The licence followed a federal environmental assessment and a two-part public hearing conducted in October and December 2025. Provincial environmental and construction-related approvals had also been obtained.

Denison’s board subsequently took a final investment decision on 24 February 2026. Site preparation and early works began in March, followed by a ceremonial groundbreaking in June and the transition to full-scale construction in July.

This sequence is important. Phoenix has progressed beyond an exploration announcement, memorandum of understanding or preliminary investment proposal. It has received major regulatory approvals, secured a corporate investment decision and entered physical construction.

However, the project has not yet entered production.

Denison is targeting first uranium output by mid-2028, based on an anticipated construction period of approximately two years. That date remains a company target and will depend on construction performance, commissioning, regulatory compliance and the receipt of any additional authorisations required for operation.

The construction licence does not itself constitute an operating licence. The Canadian regulator states that, if operation is subsequently authorised, Wheeler River could produce up to 5,400 tonnes of uranium oxide annually for as long as 15 years.

What makes Phoenix different?

Most uranium mines use conventional open-pit or underground mining methods. Ore is physically removed, transported and processed to separate uranium from the surrounding rock.

In-situ recovery takes a different approach.

A specially prepared solution is circulated through the uranium-bearing formation underground. The solution dissolves or mobilises the uranium, after which the uranium-bearing liquid is pumped to the surface and processed. The method avoids excavating large quantities of ore and can reduce the need for conventional mine shafts, open pits and extensive tailings facilities.

ISR is already widely used in countries including Kazakhstan, the United States and Uzbekistan. Applying it to the geological and hydrogeological conditions of the Athabasca Basin, however, has required significant engineering and regulatory assessment.

Phoenix plans to use a freeze wall around the mining area. Ground surrounding the orebody will be frozen to create a hydraulic barrier intended to isolate the recovery zone and control the movement of mining solutions.

The start of freeze-wall installation is therefore more than a routine construction activity. It is central to the project’s proposed groundwater-protection system.

Lower surface disturbance does not mean zero environmental risk

ISR is often promoted as having a smaller physical footprint than conventional mining. That advantage should not be interpreted as meaning that the process is environmentally risk-free.

Because the extraction process occurs within an underground geological formation, the quality of hydrogeological data is critical. Regulators must understand groundwater movement, geological connectivity, pressure conditions and the potential pathways through which mining solutions or mobilised contaminants could migrate.

Monitoring wells, leak-detection systems, water-balance controls, baseline data and clearly defined restoration requirements are therefore essential. The US Nuclear Regulatory Commission identifies groundwater monitoring and restoration as central components of ISR regulation, while International Atomic Energy Agency guidance emphasises environmental assessment, life-cycle management and responsible mine closure.

The long-term test of Phoenix will consequently not be whether it avoids constructing a conventional open pit. It will be whether Denison can maintain hydraulic control, recover uranium efficiently, protect surrounding groundwater and restore the affected formation to regulator-approved conditions after extraction.

Claims about reduced environmental impacts, low operating costs and high recovery rates currently remain partly based on company studies and projections. They must be assessed against independently monitored operational evidence once production begins.

A new supply source in a changing uranium market

Phoenix is advancing at a time when governments and utilities are placing renewed emphasis on nuclear-energy security.

The OECD Nuclear Energy Agency and the IAEA have concluded that identified uranium resources are sufficient to support substantial nuclear-energy growth through 2050 and beyond. They have nevertheless warned that timely investment in exploration, processing and new production centres will be required to ensure that those resources become available when needed.

New mines can take many years to progress from discovery through assessment, licensing, financing and construction. Geopolitical instability, regulatory delays, technical difficulties and underinvestment can therefore create supply constraints even where uranium resources exist geologically.

Phoenix illustrates this distinction between resources in the ground and uranium available to the market. The project’s environmental assessment began in 2019, its construction-licence application was submitted in 2023, public hearings were held in 2025 and construction began in 2026. Production is not expected before 2028.

The process demonstrates that secure nuclear-fuel supply cannot be created quickly in response to a sudden shortage.

Why this matters for Africa

Africa already occupies an important position in the international uranium market.

World Nuclear Association data indicate that Namibia produced approximately 7,333 tonnes of uranium in 2024, making it the world’s third-largest producer that year. Niger produced approximately 962 tonnes, while South Africa produced an estimated 200 tonnes.

Several other African countries possess identified resources or are evaluating prospective projects, including Tanzania, Zambia, Botswana, Malawi, Mauritania and the Central African Republic.

The start of Phoenix construction could affect African countries in several ways.

First, additional Canadian production could improve diversification for international nuclear utilities. A more diverse supply base strengthens fuel security but also increases competition among uranium-producing jurisdictions for investment and long-term supply contracts.

Second, Phoenix demonstrates that investors increasingly assess more than ore grade. They examine regulatory predictability, infrastructure, electricity and water availability, environmental approval processes, political stability, community relationships, financing conditions and the credibility of mine-closure arrangements.

African countries with uranium resources will therefore not attract sustainable investment merely by granting mining rights. They will need institutions capable of regulating the entire project lifecycle.

Third, Phoenix provides a practical regulatory reference for African countries considering ISR projects. Tanzania, for example, has previously examined the potential application of in-situ recovery at proposed uranium developments. African regulators may need specialised competence in hydrogeology, geochemistry, wellfield design, groundwater modelling, radiological monitoring and post-mining restoration before approving such operations.

Five policy lessons for African uranium states

The Canadian project points to five broad priorities for Africa.

1. Regulatory capacity must precede project approval

A uranium project requires more than an ordinary mining licence. The responsible authorities must be able to assess radiation protection, groundwater impacts, radioactive residues, occupational exposure, transport, emergency preparedness, security and long-term environmental liabilities.

Where responsibilities are divided among mining, environmental, water and nuclear regulators, their mandates and decision-making interfaces should be clearly defined.

2. Baseline environmental information is indispensable

Groundwater and surface-water conditions must be established before mining begins. Without reliable baseline information, it becomes difficult to determine whether later changes were caused by the project or existed naturally.

Monitoring data should be independently reviewable and, except for legitimately protected security or commercial information, publicly accessible.

3. Closure funding must be secured in advance

Governments should require financial assurance sufficient to cover decommissioning, groundwater restoration, waste management and long-term monitoring.

Closure obligations should not depend on the future financial health of the mine operator. Funds or guarantees must be protected so that environmental liabilities do not eventually fall on the state or affected communities.

4. Communities must participate meaningfully

Consultation should begin before major project decisions are made. Agreements should clearly address land access, employment, local procurement, environmental monitoring, grievance mechanisms and community benefits.

Canada’s experience with Indigenous and northern communities is not directly transferable to every African jurisdiction, but it reinforces the principle that local participation must be institutionalised rather than treated as occasional corporate outreach.

5. Uranium policy should support broader development

African countries should avoid treating uranium solely as a raw commodity for export.

A responsible strategy should consider domestic skills development, laboratories, radiation-monitoring services, specialised engineering, local supplier participation, transport infrastructure and research partnerships. Not every producer will be able to develop conversion, enrichment or fuel-fabrication capabilities, but all can seek greater participation in the value created around mining and environmental management.

Construction is a milestone—not proof of performance

The Phoenix project has crossed an important threshold. It has obtained major approvals, reached a final investment decision and entered full construction.

Its projected economics remain promising, but they are not guaranteed. Denison’s current post-investment-decision capital estimate is approximately C$600 million, including contingency and owner reserves. That estimate is about 20% higher than the inflation-adjusted figure associated with the 2023 feasibility study.

Further cost increases, construction delays, technical challenges or changes in uranium prices remain possible.

Similarly, the target of first production in mid-2028 should not be presented as an accomplished outcome. Phoenix must still complete construction, demonstrate its systems, satisfy regulatory requirements and prove that its proposed ISR approach performs safely and economically at commercial scale.

For Africa, the most important lesson is not that one Canadian mine will transform the uranium market. It is that credible uranium development requires years of technical preparation, independent regulation, environmental evidence, financial commitment and sustained engagement with affected communities.

As international interest in nuclear energy grows, African uranium resources may become increasingly strategic. Whether they produce lasting national benefits will depend less on the existence of the resources than on the quality of the institutions governing their development.