Using cold water from Dworshak Dam, the U.S. Army Corps of Engineers began this week sending water downstream to cool the tailwater at Lower Granite Dam as an aid to sockeye salmon passage at the dam.

Using cold water from Dworshak Dam, the U.S. Army Corps of Engineers began this week sending water downstream to cool the tailwater at Lower Granite Dam as an aid to sockeye salmon passage at the dam.