EPA Issues Pollution Permits For Four Lower Columbia River Dams: Includes Possible Testing Of Drawdowns To Reduce Water Temps For Salmon

One way to cool overheated summer and fall Columbia River waters might be to lower reservoir levels at the river’s dams. Drawdowns could reduce the size of the reservoirs so there is less water to heat under the summertime sun and it could reduce travel time for juvenile salmon and steelhead through the dams as the river would take on more of the characteristics of a free flowing stream.

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