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With facilities at risk of collapse under the strain of climate change, nations say much more federal funding is needed for upgrades and repairs.

Due to chemical pollution, the treaty-protected fish in the Columbia River Basin pose health risks for Indigenous tribes.

Without passageways to cross dams along the Columbia, salmon are dying. Tribes say the U.S. government isn't cooperating as they try to help the fish recover.

After two decades and $2 billion in spending, the U.S. government's promises to Native tribes to boost fish populations in Oregon and Washington haven't held up.

Environmentalists call the decision a ‘watershed moment,’ as concerns about groundwater pollution mount in Yakima Valley and Whatcom County.

Unprecedented temperatures recall a 2015 heat wave that killed 99% of salmon returning to one stretch of the Snake River.

U.S. Fish and Wildlife Service considers listing Mt. Rainier ptarmigan on the federal endangered species list.