- world's largest, high-grade uranium deposit with proven and probable reserves of 349.1 million pounds U3O8 (Cameco's share – 243.7 million pounds)
- average ore grade of 20.7% U3O8
- operated by Cameco
- ore milled at the Key Lake operation, 80-kilometres southwest by road
- the McArthur River and Key Lake operations together employ approximately 750 people
- production capacity of 18.7 million pounds U3O8 annually - ore from McArthur is blended for processing with low-grade ore in stockpile at Key Lake
- achieved International Standards Organization (ISO 14001) Certification in 2003
- Cameco's share of 2007 production was 13.1 m lbs U3O8