US EditionOne year after Chilcotin landslide, risks to salmon could worsen
The landslide caused a 50% mortality loss in the 2024 sockeye run and destabilized slopes, prompting ongoing monitoring and calls for proactive mitigation efforts.
- One year after the July 30, 2024 event, the T]ilhqot'in Nation warns the worst impacts on sockeye and Chinook salmon and the T]ilhqox river system may still be ahead.
- The landslide reshaped the T]ilhqox, depositing sediment and destabilizing slopes, producing ongoing turbidity and heightening landslide risk during the 2025 season.
- The task force estimated the slide at up to 22,000 cubic metres, noting it could raise river levels by four metres; the Emergency Salmon Task Force recommends trap-and-transport in-season and blasting for long-term solutions.
- Faced with heavy losses, the Chilko sockeye run experienced an estimated 50% mortality, with many returning salmon arriving damaged or unable to reach spawning grounds, impacting T]ilhqot'in communities.
- The Pacific Salmon Commission has integrated Task Force monitoring into its analyses, while the T]ilhqot'in Nation called on Canada, the U.S., and the PSC for immediate action in an August 20, 2025 press release.
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Tŝilhqot’in Nation warns salmon are still at risk from 2024 Tŝilhqox landslide
One year after the Tŝilhqox (Chilcotin River) landslide, the Tŝilhqot’in Nation is warning that the most serious impacts on salmon and the river system may still be ahead.On July 30, 2024, a landslide fully blocked the Tŝilhqox during the key migration period for sockeye and Chinook salmon. The landslide created an 11-kilometre lake upstream of the dam and triggered an extreme breakout flood event that severely altered the critical migratory pat…
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