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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    WDFW-Bonneville Dam observations

    Metadata Updated: January 24, 2026

    Visual observations of Chinook salmon ascending fish ladders at Bonneville Dam by ecotype (Bright and Tule) and size class (Jack, Stubby, and Adult) conducted during approximately 1-hour counting periods midday from August through October. These counts are used by fisheries managers to break down visual observations of the total number of Chinook throughout the entire day into different management stocks. The information is used to evaluate run sizes relative to pre-season forecasts to align management targets for harvest with conservation objectives. The visual classifications of ecotypes are subject to errors, which can be substantial in some circumstances, such as when the visual characteristics that distinguish the ecotypes are less pronounced. These data are not used in end-of-season calculations of run size and harvest rates but rather are a tool for in-season monitoring of approximate run size.

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

    Downloads & Resources

    Dates

    Metadata Created Date July 26, 2025
    Metadata Updated Date January 24, 2026

    Metadata Source

    Harvested from WA JSON

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date July 26, 2025
    Metadata Updated Date January 24, 2026
    Publisher data.wa.gov
    Maintainer
    Identifier https://data.wa.gov/api/views/w52y-hhyj
    Data First Published 2025-07-23
    Data Last Modified 2026-01-24
    Category Natural Resources & Environment
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.wa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id d9b08fe2-5d34-4993-a89e-034935795690
    Harvest Source Id 1c33d1cb-2f69-4f1b-835e-453790f38dc7
    Harvest Source Title WA JSON
    Homepage URL https://data.wa.gov/d/w52y-hhyj
    Source Datajson Identifier True
    Source Hash af81a1f812aa8613773b3ef8d43e8099796a1f87fd93eac7357fae02fdcb48d5
    Source Schema Version 1.1

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