Willamette Valley Downstream Fish Passage Monitoring Via Rotary Screw Traps

EAS is working on rotary screw trapping services to provide information on the numbers collected, trap efficiency estimates, migration timing, size, and condition of naturally- produced juvenile salmonids exiting in the reservoirs of multiple Corps facilities in the Willamette River basin. USACE has modified operations at multiple Corps facilities to improve downstream fish passage and survival of juvenile salmonids and the information collected will be used to evaluate these modifications.


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