Cameco Temporarily Suspends Cigar Lake Mine Operations
Cameco announced our Cigar Lake mine in northern Saskatchewan has temporarily suspended operations due to challenges at Orano's McClean Lake mill, where Cigar Lake ore is processed. Orano's McClean Lake mill has encountered operational challenges with its sulfuric acid plant that caused it to shut down in order to repair the issue. Orano is currently working to bring the acid plant back online and is assessing options to obtain acid supply from an alternative source while it waits for replacement parts to complete the repair. With limited ore storage capacity at Cigar Lake, the company has temporarily suspended mining activities until sufficient acid is available to allow milling to resume at McClean Lake. The company said, "At present, we expect the McClean Lake mill to return to operation in approximately two weeks, and we do not expect the disruption to impact our 2026 production outlook for Cigar Lake. However, there is a risk that the repairs to the acid plant take longer than planned and that mining at Cigar Lake is unable to resume on the expected schedule. Depending on the duration of any additional delays, our 2026 production outlook could be impacted."