High-grade ore from McArthur river is blended with lower grade local rock before being passed through the mill.

In late 2017, citing "continued low uranium prices," Cameco announced that the McArthur River/Key Lake operation would suspend production for approximately ten months starting by the end of January 2018.

[4] In July 2018 Cameco announced that this shut-down would extend for an indefinite period of time pending an upswing in the uranium market.

[1] A lone timber wolf attacked fifty-five-year-old Fred Desjarlais who was jogging back to the mine's camp on 31 December 2004.

A few hours later, an air ambulance took Desjarlais from Key Lake Airport to Saskatoon's Royal University Hospital where he began a series of rabies treatments.