Warm water wreaks havoc on Columbia River fish

8/12/2015  By John Harrison - Northwest Council

The unusually warm June and July raised Columbia River water temperatures to lethal levels, and above, for weeks, coinciding with the peak of the migration for the most temperature-sensitive salmon, sockeye. Spring Chinook and steelhead, which migrate earlier in the year, also were affected, and fall Chinook, which are migrating now, likely will be affected, as well. Representatives of the four Northwest state fish and wildlife agencies, plus the U.S. Army Corps of Engineers and NOAA Fisheries, briefed the Northwest Power and Conservation Council at its August meeting.

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