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Fish Passage Decision Support System
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 FPDSS Map Viewer:

Go to the FPDSS's interactive map viewer.

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    • Welcome
    The Fish Passage Decision Support System (FPDSS) is an online application funded by the U.S. FWS Fish Passage Program. The FPDSS makes information about barriers to fish passage in the U.S. available to policy makers and the public.
    Barrier Removal Modeling
    Model the removal of a barrier to fish passage. The modeling operation can model fish passage both upstream and downstream of the barrier.
    Area Profile
    Create a profile report about a geographic area. Information returned includes maps of the area, barrier summary information, and hydrology.
    Featured Fish Passage Program Project
    Project Name:Big Hole River, Montana
    FWS Region:Mountain-Prairie
    Year Completed:1999
    Description:
    The Big Hole River, in southwest Montana, contains the last native population of the fluvial (river dwelling) Arctic grayling in the lower 48 states. The fluvial Arctic grayling are currently a candidate species for listing under the ...
    Benefits:
    This project installed irrigation diversion screening, preventing juvenile fish from being lost in hay fields or irrigation ditches and maintaining within a 20-mile stretch of riverine habitat.
    No Picture.