Starting next spring federal regulators starting will require dam operators to limit hot water pollution caused by the four Lower Snake River dams.
The EPA’s temperature permits will take effect on April 1, 2022, and will last for five years.
Overall, the permits will require the temperature on the Snake River to be lowered by around 5 degrees Fahrenheit to meet water quality standards, although temperature reductions will vary by time of year and dam location.
LINK (via KUOW)
