NexGen Energy Secures Final Canadian Construction Licence for Rook I Uranium Project

The Canadian Nuclear Safety Commission handed NexGen Energy its last remaining regulatory hurdle on March 5, issuing a Licence to Prepare Site and Construct for the Rook I uranium project in northern Saskatchewan's Athabasca Basin and clearing the company to break ground this summer.

The approval landed just 14 business days after the CNSC's final two-part Commission Hearing concluded on February 12, 2026. Combined with the Province of Saskatchewan's environmental assessment endorsement from November 2023 and all other necessary provincial authorizations already in hand, NexGen confirmed the licence "marks the final regulatory approval required to initiate full construction of the Project."

NexGen stated it had already made its Final Investment Decision before the licence arrived. Teams, procurement contracts, engineering plans, vendors, contractors, and capital are described as fully positioned for "advanced site and shaft sinking preparation," with official construction set to commence in summer 2026. The build-out is scheduled to run four years from that start date.

The scale NexGen is targeting for Rook I is striking. According to GlobalData and Mining-technology figures, the project aims to produce up to 30 million pounds of uranium annually once operational, a volume that would represent more than 20% of current global supply and more than half of the Western world's output. NexGen describes the project as being developed into "the largest low-cost producing uranium mine globally," backed by an N.I. 43-101 compliant Feasibility Study.

Rook I is 100% owned by NexGen Energy (TSX: NXE / NYSE: NXE / ASX: NXG), a Vancouver, British Columbia-based company. The project was developed in partnership with local Indigenous communities in the Athabasca Basin, according to GlobalData and Mining-technology reporting, and NexGen has framed the construction phase as advancing "long-term economic benefits, skilled jobs, sustainable growth for the region, and Canada's nuclear energy leadership."

For the uranium supply community watching western fuel security, a single mine potentially covering half of Western-world output carries obvious strategic weight. The four-year construction clock starts this summer.