NexGen starts $1.6B uranium build to rival top mines
NexGen Energy says it has begun construction of its C$2.2 billion Rook I uranium project in Saskatchewan. The underground mine and mill are expected to take about four years, targeting about 30 million lb of uranium annually. The Canadian Nuclear Safety Commission approved the environmental assessment and granted a construction licence. A 2021 feasibility study projected C$3.5 billion NPV8% and 233.6 million lb yellowcake over 11 years.
How this was made

The 30-second read
Why it matters
Regulatory clearance and earthworks progress reduce permitting risk, but the project still requires years of development before production, limiting immediate cash-flow implications.
Market read
Traders may reprice NXE on de-risking progress for a large uranium development, while still discounting the long time to first production.
What to watch
The article does not mention updated capex, financing terms, EPC contracts, or binding offtake, which are key for translating construction progress into risk-adjusted value.
Background
Rook I is NexGen’s Saskatchewan underground mine and mill project, positioned as a potential major new uranium source if it reaches targeted output.
Ticker impact
NexGen started construction of the Rook I uranium project after CNSC approved the environmental assessment and granted a construction licence.
Likely supportive for sentiment and longer-dated valuation, with limited immediate impact until clearer capex, schedule, or financing details emerge.
The article discloses a fresh milestone (construction start plus licence/approval context) and provides scale targets, but it does not include new financing, offtake, or updated production guidance beyond the project plan.
Market effects
Adds another large Canadian uranium supply project to the pipeline, reinforcing bullish narratives around long-cycle uranium development.
Highlights Saskatchewan as a continued hub for uranium development and permitting progress.
Supports the broader thesis of tightening uranium supply for nuclear fuel demand, though near-term supply impact is limited.
Counterpoint
Large uranium projects can face multi-year cost and schedule slippage, so construction-start headlines may overstate near-term supply certainty.
Key entities
- companyNexGen Energy
Started construction of the Rook I uranium project in Saskatchewan and provided project build and infrastructure milestones.
- regulatorCanadian Nuclear Safety Commission
Approved the environmental assessment and granted a licence to construct Rook I, clearing the final regulatory hurdle.
- companyCameco
Referenced for comparison on McArthur River-Key Lake licensed production and 2026 guidance.




