Research at McNary Dam is endangering juveniles migrating through the dam, say regional salmon managers, prompting them to ask the Army Corps of Engineers this week to operate all turbines at the dam within the 1 percent peak efficiency range, which is required by the NOAA Fisheries 2000 Biological Opinion, and to cease the Vertical Barrier Screen (VBS) tests, which require operation of turbine units at the dam outside that range.
