Key Lake Mill

Cameco to suspend production of McArthur River and Key Lake Operations

On July 25, 2018, Cameco announced an extended period of suspended production for the Key Lake and McArthur River operations in northern Saskatchewan, which took effect in January 2018. Cameco has confirmed to the CNSC that during the period of suspended production at the Key Lake and McArthur River operations, Cameco will maintain the necessary resources and essential services to ensure all CNSC regulatory requirements continue to be met.

The CNSC has requested that Cameco provide additional information detailing the activities necessary to ensure continued protection of health, safety and the environment during the period of suspended production. CNSC staff will continue to conduct compliance activities to ensure continued safe operations and protection of the environment. The CNSC may modify its regulatory inspection focus to increase verification scrutiny on suspension of production activities.

For further information, visit the Cameco website.

Cameco owns and is licensed to operate the Key Lake Mill site, located in northern Saskatchewan. The CNSC has full-time staff in Saskatoon and Ottawa who perform regular inspections to evaluate operations and to verify compliance with regulatory requirements and licence conditions.

Facility Information

Aerial view of Cameco’s Key Lake Mill

Aerial view of Cameco’s Key Lake Mill

Location: Northern Saskatchewan
Licensee: Cameco Corporation
Status: Operating
Licence issued: November 1, 2013
Licence expires: October 31, 2023
Start of commercial operation: 1983

Licensing documentation: Request a copy of the Key Lake Mill licence and licence condition handbook by email

The Key Lake site included two ore bodies, Gaertner and Deilmann, discovered in 1975 and 1976. Mining was conducted between 1983 and 1997. Milling began in 1983 and continues today. Since 1999, uranium ore is transported from the McArthur River Mine to Key Lake for milling. The mill is located approximately 570 kilometres north of Saskatoon, Saskatchewan. For more information, visit Cameco's website.

Focus on safety and the environment

The CNSC is committed to protecting the safety of people and the environment. Click below for current environmental and safety performance data for Cameco’s Key Lake Mine

Operating Performance of the Key Lake Mill

The CNSC produces an annual report on the performance of uranium fuel cycle and processing facilities, which includes the Key Lake Mill. The report provides information on events, facility modifications, and areas of increased regulatory focus. It also tracks data on:

  • public and worker radiation dose
  • lost-time incidents for workers
  • environmental monitoring results
  • environmental reportable spills and corrective actions taken
  • current financial guarantees for future decommissioning costs

Read the report to learn about the Key Lake Mill's operation performance.

Key-Lake Mill - decorative image

Disclosure Protocol

As part of CNSC's regulatory requirements, major licensees must have robust public information and disclosure programs in place. These programs include a disclosure protocol developed in consultation with community stakeholders.

Regulatory Reporting

Other Key Topics

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