Officials with the Yukon government say dozens of dead fish found earlier this week in a creek near Victoria Gold's Eagle mine were likely killed by a discharge of contaminated water from the mine site.

The Red Dog Mine announced last week that it was able to start the use of a new waste water treatment system to purify water after record-breaking warm weather in 2019 caused the sediment levels to rise in the Ikalukrok and Wulik Rivers.

The multinational company that operates the Red Dog Mine in Northwest Alaska says that thawing permafrost linked to global warming has forced it to spend nearly $20 million to manage its water storage and discharge.

The Little Salmon Carmacks First Nation is warning spring melt could cause the tailings dam at the abandoned Mount Nansen mine in central Yukon to overflow or breach, which would send a toxic slurry into the environment.