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.
  • Since McArthur River production began, these operations have reliably produced more than 291 million lbs using mining methods best-suited for the ground conditions.

McArthur River Video

Key Lake Video

Cameco ownership, McArthur River (70%), Key Lake (83%)
Licenced to 2023

Q3 2016 Update


Production for the third quarter was 21% lower compared to the same period last year due to a longer planned mill maintenance shut down. Production for the first nine months was slightly lower than last year due to lower planned annual production.

McArthur River/Key Lake Production

Cameco's Share (millions lbs)

3 months ended
September 30
9 months ended
September 30
2016 2015 Change 2016 2015 Change 2016 Plan
3.1 3.9 (21)% 8.8 9.5 (7)% 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.