Name of the Project
Rook I uranium project.

Location
Saskatchewan, Canada.

Project Owner/s
Uranium miner NexGen Energy.

Project Description
Rook I is the biggest development-stage uranium project in Canada.

The project hosts the Arrow deposit, which, in turn, hosts measured and indicated mineral resources of 256.7-million pounds of uranium contained in 3.75-million tonnes grading 3.1%.

The project has a mine life of 11.7 years, with average production estimated at up to 30-million pounds a year.

Average production is estimated at 19.8-million pounds a year of uranium over the life-of-mine.

Access to the underground Arrow deposit will be through two shafts, an 8-m-diameter production shaft (intake air) and a 5.5-m-diameter exhaust shaft (second egress). Access to the workings will be from the production shaft.

Conventional longhole mining will be used for production. The mining method will use mechanised equipment and conventional processes widely employed in the global mining industry.

The estimated mill capacity is targeted stated at 1 300 t/d of ore.

The key infrastructure contemplated includes:

• underground infrastructure, including materials handling systems, maintenance facilities, a fuel bay, an explosives magazine, ventilation, a paste backfill and a paste tailings distribution system, electrical and communications facilities, underground water supply and dewatering facilities.
• an underground tailings management facility.
• surface support infrastructure for the mine, including headframe and hoist facilities, a surface explosives magazine and ventilation fans.
• surface support infrastructure for the mill, including a process plant, a solvent-extraction plant, an effluent treatment plant and an acid plant.
• site support infrastructure, including an accommodation camp, liquefied natural gas (LNG) facilities, an LNG power plant, mine and mill dry facilities, analytical and metallurgical laboratory and maintenance, as well as warehouse and security buildings.
• a surface ore-storage stockpile facility, as well as waste-rock storage facilities for potentially acid-generating, water management facilities, consisting of two site water runoff ponds, six contact water process ponds, a potential acid-generating stockpile runoff collection pond, and conveyance and diversion structures.
• domestic and/or industrial waste management areas.
• an airstrip.

Potential Job Creation
Not stated.

Net Present Value/Internal Rate of Return
The project has an after-tax net present value, at an 8% discount rate, of C$6.32-billion and an internal rate of return of 45.2%, with a payback of one year, based on a uranium price of $95/lb. Payback is estimated at 12 months.

Capital Expenditure
C$2.2-billion.

Planned Start/End Date
Not stated.

Latest Developments
NexGen Energy has doubled its contracted sales volumes to more than ten-million pounds, signing a second offtake agreement with a major US utility as the company advances its project.

The new agreement secures the delivery of one-million pounds a year of uranium over a five-year period, starting in the first year of commercial production. It follows NexGen’s inaugural sales contracts, announced in December 2024.

The latest deal incorporates market-related pricing mechanisms that provide significant leverage for uranium prices at the time of delivery, a cornerstone of NexGen’s offtake strategy.

Key Contracts, Suppliers and Consultants
None stated.

Contact Details for Project Information
NexGen Energy, tel +1 306 954 2275.