McArthur River/Key Lake
- McArthur River/Key Lake, located in northern Saskatchewan, Canada, are the world's largest high-grade uranium mine and mill.
- In service since 1999 and 1983 respectively, Cameco operates the ISO 14001 certified operations, which have collectively produced 583 million pounds using a variety of mining methods.
Operation
McArthur River Reserves
2026 Q1 Update
- Production
McArthur River Production
Cameco's Share (million lb)Three months
ended March 312026 2025 Change 2026 Plan 3.5 3.2 9% 10.0 to 11.5 In the first quarter of 2026, total packaged production from McArthur River and Key Lake was 5.0 million pounds (3.5 million pounds our share) compared to 4.6 million pounds (3.2 million pounds our share) in the first quarter of 2025.
We continue to expect production of 14.0 to 16.5 million pounds (10.0 to 11.5 million pounds our share) in 2026.
- Maintenance Shutdowns
At the Key Lake mill, the annual maintenance shutdown will begin in the third quarter, which will include the installation of new infrastructure and repairs to major existing infrastructure. As a result of this work, the shutdown is expected to be longer than in previous years.
There is no planned shutdown of the McArthur River mine in 2026.
- Labour Relations
A new collective agreement with the United Steelworkers Local 8914 was reached in April 2026, for a 3-year term, expiring in December 2028.
Environment & Safety
Worker safety, environmental monitoring and proper decommissioning, after mining is completed, are of the utmost importance to Cameco.
Reserves & Resources
Our mineral reserves and resources are the foundation of our company and fundamental to our success.
Caution about Forward-Looking Information
This page may contain forward-looking information that is based upon the assumptions and subject to the material risks discussed on page 2 of Cameco's most recent Quarterly MD&A.
Map
