Fish Migration

Science Center Objects

 As hydropower dams age and require critical upgrades, USGS hydrologists, engineers and fish biologists work together to design the next generation of dams and operational protocols that improve passage for migratory fish and cause fewer negative effects on upstream and downstream ecosystems.  

Each project below is associated with a type of energy production or transmission. Types of energy production or transmission are represented by the following icons:

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Hydropower

Abbreviations used in project descriptions are defined on the Energy and Wildife Abbrevations page.

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Reintroduction of Anadromous Salmonids to Reservoirs Above Hydroelectric Dams 

Science Center: Western Fisheries Research Center

USGS scientists evaluated the feasibility of reintroducing native salmonids to hydropower reservoirs in Washington State to determine if the reservoirs could support reintroduced populations of salmonids. These reservoirs serve both as functional migration corridors and profitable juvenile rearing habitats despite hosting abundant predator populations. The scientists evaluated consumption demand and seasonal food availability as well as potential predation mortality to juvenile anadromous salmonids. This approach can assist fisheries managers and power operators by identifying options for design and operations of hydropower facilities that could balance power demand with increased fish production.