McArthur/Key Lake

  • The title of world's largest uranium producer belongs to the the McArthur River-Key Lake tandem operation located in northern Saskatchewan, Canada.
  • Cameco operates both ISO 14001 certified locations which have been in production since 1999 and 1983 respectively.
  • Combined, these two operations have reliably produced more than 518 million lbs using a variety of mining methods best-suited for the ground conditions.

McArthur River Video

Key Lake Video

Operation(As of December 31, 2016)
Cameco ownership, McArthur River (70%), Key Lake (83%)
1,299 people employed, 54% are from northern Saskatchewan
Production(As of December 31, 2016)
Average grade of 9.6% U3O8
Licenced to 2023
12.6 m lbs U3O8 annual production trend (Cameco's share)

Q1 2017 Update


Production for the first quarter was 24% higher compared to the same period in 2016 due to the timing of planned maintenance. Last year, a planned first quarter mill shut down resulted in lower first quarter production while in 2017, maintenance activities are expected to be completed during an extended six-week shut down planned for the third quarter.

McArthur River/Key Lake Production

Cameco's Share (million lbs)

3 months ended
March 31
2017 2016 Change 2017 Plan
3.6 2.9 24% 12.6

See full Quarterly Report

Environment & Safety

Worker safety, environmental monitoring and proper decommissioning, after mining is completed, are of the utmost importance to Cameco.

See more

Reserves & Resources

Our mineral reserves and resources are the foundation of our company and fundamental to our success.

See more

Caution about Forward-Looking Information

Please click here for additional information about the assumptions applied in making the forward-looking statements on this page and the factors that could cause results to differ materially.