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Juvenile Salmonid Collector Evaluation

juvenile salmon collector, environmental consulting services

Overview 

Fish passage is an important consideration for most PNW dams. A PNW hydroelectric project uses a floating surface collector to gather and transport salmonids. Following physical modifications in 2018, our client wanted to evaluate the effectiveness of the new modifications at collecting salmonids.

Our Role

Four Peaks scientists and engineers lead a combined PIT- and acoustic-telemetry juvenile salmon fish passage evaluation for this project. The ongoing evaluation provides reach-specific conversion estimates of juvenile steelhead, Coho Salmon, and Chinook Salmon. We also study near-field behaviors and bottlenecks. The ultimate goal is to provide strategies for meeting passage objectives. Our scientists and engineers also advise on velocities, vibration, and operational issues that negatively influence collection rates. Further, we provide studies on alternative life histories that are expressed in reservoirs above high-head dams in the Pacific Northwest. As part of our data solutions support, Four Peaks engineers develop algorithms coded in Python to position acoustic-tagged fish in three dimensions. Several high-head dams in the region now use this innovative approach.

At A Glance

Client Type
Utility

Location
Washington

Project Timeline
2019 to Present

Service Area(s)
,

Project Manager: Samuel Haffey, MEng, PE

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