EPA Releases Draft Columbia River Cold Water Refuge Plan; 12 Tributaries Tagged For Protection; Scientists’ Letter Says Lower Snake Dam Breaching Needed To Reduce Temps For Fish

Summer water temperatures in the Columbia River can rise high enough (above 20 degrees Centigrade, 68 degrees Fahrenheit) to have adverse impacts on salmon and steelhead migrating upstream. Such temperatures cause disease, stress, and lower spawning success and can kill the fish.

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