Hydropower Fish Passage Webmap

Publication Date:
April 30, 2025
Authors:
Christopher R. Derolph, Paul G. Matson and Bryan B. Bozeman
Organization:
HydroSource
Institution:
Oak Ridge National Laboratory
Hydropower Fish Passage Webmap featured image

The National Fish Passage Webmap application provides an environment that allows users to visualize information on fish passage facility existence, type, and direction at hydropower developments across the conterminous United States.

It was developed through collaborative partnerships with fish passage engineers and biologists at both the US Fish and Wildlife Service (USFWS) and the National Marine Fisheries Service (NMFS), and hydropower experts at the Low Impact Hydropower Institute (LIHI). Data on fish passage facilities at hydropower features were compiled from numerous sources including published and non-published datasets, published reports, email communications with federal and state resource managers and hydropower operators, and by extracting information from regulatory documents within the FERC eLibrary. The number of sources for a given feature varied, which occasionally resulted in conflicting information regarding the existence of fish passage facilities or in the type or sub-type of passage technologies. Such discrepancies were reviewed and resolved individually, based on the weight of evidence or, when available, on direct observations from information providers or aerial imagery.

D.O.I.

10.21951/ORNL_Fish_Passage_Webmap/2563537

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