Environmental Impact Statement

The Environmental Assessment (EA) for the Rook I Project (Project) evaluated the potential environmental effects associated with all Project activities during all phases.

An Environmental Impact Statement (EIS), which contains the Project EA, was developed by NexGen and represented a culmination of more than eight years of detailed data collection and analysis incorporating all Project technical, environmental, and social aspects. A draft EIS was submitted to the provincial and federal regulators in 2022, with provincial technical review comments and federal technical and public review comments received by NexGen in Q4 2022.

NexGen has been working with Indigenous Groups throughout the EA process to ensure Indigenous and Local Knowledge was incorporated into the EIS.

Following conclusion of the provincial technical review process in Q3 2023, NexGen submitted a revised provincial EIS to the provincial regulator – the Saskatchewan Ministry of Environment (ENV) – which underwent public review between September 2023 and October 2023. On 9 November 2023, NexGen received Ministerial approval under The Environmental Assessment Act of Saskatchewan to proceed with the development of the Rook I Project. NexGen is the first company in more than 20 years to receive full provincial EA approval for a greenfield uranium mine and mill project in Saskatchewan. This concluded the rigorous provincial Environmental Impact Assessment process and represents the major regulatory milestone ahead of full development of the Rook I Project. Receipt of the provincial EA approval enables the Company to progress with securing the necessary provincial and federal approvals to construct the Project.

NexGen submitted responses to all federal technical review comments received on the Draft EIS, with the federal regulator – the Canadian Nuclear Safety Commission (CNSC) – confirming on 18 November 2024 that all information requests had been successfully addressed. On 29 November 2024, NexGen submitted a revised EIS, and on 28 January 2025, the CNSC confirmed that the EIS was accepted as final. The next and final steps in the federal approval process include holding a Commission Hearing Date for the Project, subject to which the CNSC will render an approval decision on the Project.