Here’s the latest I can provide based on recent reporting.
What happened: Cameco temporarily halted production at Key Lake and reduced activity at the McArthur River mine due to severe flooding in northern Saskatchewan that disrupted a key supply road, the Smoothstone River Bridge, limiting deliveries of critical operating materials. The Cigar Lake operation remained online. The company did not specify a firm resumption date, saying the timeline depends on when normal deliveries can resume. [Cite: sources reporting May 10, 2026 updates from The Northern Miner and other outlets][2][4]
Production and outlook: In the first quarter of 2026, Key Lake and McArthur River combined produced about 5.0 million pounds (100% basis), up from 4.6 million pounds in Q1 2025, but the May disruption could affect 2026 production outlook depending on how long road restrictions last. The company kept its overall annual plan under review and indicated Cigar Lake remains unaffected. [Cite: May 2026 production figures and outlook notes][1][4]
Operational context: The floods have not directly inundated the sites, but road restrictions have hindered delivery of essential materials. There is no information about a shutdown at Key Lake beyond the current disruption, but prolonged delays could force broader production impacts if the road access remains constrained. [Cite: May 10, 2026 operational update and bridge disruption details][8][2]
If you’d like, I can assemble a concise timeline and fetch the latest official Cameco update page to confirm current status.
Canadian uranium miner Cameco (TSX: CCO; NYSE: CCJ) has temporarily halted production activities at its Key Lake mill and reduced activity at its McArthur River mine after flooding damaged transport...
www.northernminer.comSevere flooding in northern Saskatchewan has forced Cameco to halt operations at its Key Lake uranium mill. The collapse of the Smoothstone River Bridge has disrupted a vital supply route, posing challenges for the province's booming resource economy. How will this impact future production?
investingnews.comSaskatoon, Saskatchewan, Canada, May 10, 2026All amounts in Canadian dollars unless specified otherwiseCameco (TSX: CCO; NYSE: CCJ) today provided an operational update for our northern Saskatchewan sites amidst flooding in the region, which is impacting roadways.
www.cameco.comCameco Corp will temporarily suspend production from the McArthur River mining and Key Lake milling operations in northern Saskatchewan by the end of January "due to continued uranium price weakness", the Canadian uranium producer announced yesterday. The duration of the suspension and temporary layoff of about 845 workers is expected to last 10 months, it said.;
world-nuclear-news.orgCameco Corp: Northern Saskatchewan operations update Cameco Corp - temporarily halted production activities at Key Lake mill and reduced activity at McArthur River mine Cameco Corp - flooding...
ae.marketscreener.comThe company said its sites in northern Sask. aren’t directly impacted by the spring flooding, but the collapse of the Smoothstone River Bridge has made it difficult to get supplies to the sites.
www.cjme.comCameco said 845 jobs would be "temporarily" lost by the end of January due to the shutdowns at Key Lake and McArthur River.
globalnews.caCameco Corp: Northern Saskatchewan operations update Cameco Corp - temporarily halted production activities at Key Lake mill and reduced activity at McArthur River mine Cameco Corp - flooding...
www.marketscreener.comCameco halted Key Lake production and cut McArthur River activity after flooding collapsed a key Saskatchewan supply bridge.
thedeepdive.caCameco (TSX: CCO; NYSE: CCJ) announced today that due to continued uranium price weakness, production from the McArthur River mining and Key Lake milling operations in northern Saskatchewan will be temporarily suspended by the end of January 2018 and that the company's annual dividend will be reduced to $0.08 per common share in 2018.
www.cameco.com