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    • ElwhaChemical - Elwha River Dam Removal Study

    Metadata Updated: October 18, 2025

    This project monitors ecosystem response to dam removals on the Elwha River, Washington State. The Elwha Dam removal project is the largest project of its kind in the world and is the largest restorative action that has taken place in any Western U.S. Evolutionarily Significant Unit (ESU). Ecosystem response includes changes to aquatic habitat, the food web, and all aspects of the viable salmon parameters of listed and non-listed salmonid species. The project is based on the development and implementation of the Elwha Monitoring and Adaptive Management Guidelines (EMAM), which was developed as a collaborative effort between the Watershed Program at the NWFSC, the Lower Elwha Klallam Tribe (LEKT), the United States Department of Fish and Wildlife Service (USFWS), the United States Geologic Survey (USGS), the Washington Department of Fish and Wildlife (WDFW), and the National Park Service (NPS). We employ a variety of metrics to efficiently monitor ecosystem condition over space and time. This project will provide data to assess changes for the listed Elwha River populations (Chinook salmon and steelhead), and help determine whether those populations are improving, static, or declining. Such analyses are crucial to help inform future large-scale dam removals for multiple ESUs across the Western U.S. Elwha dam removal monitoring, chemical data.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date October 7, 2025
    Metadata Created Date October 19, 2024
    Metadata Updated Date October 18, 2025
    Reference Date(s) June 1, 2000 (creation), June 9, 2017 (publication)
    Frequency Of Update

    Metadata Source

    Harvested from NMFS NWFSC

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date October 7, 2025
    Metadata Created Date October 19, 2024
    Metadata Updated Date October 18, 2025
    Reference Date(s) June 1, 2000 (creation), June 9, 2017 (publication)
    Responsible Party (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:18017
    Access Constraints Cite As: Northwest Fisheries Science Center, [Date of Access]: ElwhaChemical - Elwha River Dam Removal Study [Data Date Range], https://www.fisheries.noaa.gov/inport/item/18017., Access Constraints: NA
    Bbox East Long -122.2962
    Bbox North Lat 47.6549
    Bbox South Lat 47.6449
    Bbox West Long -122.3062
    Coupled Resource
    Frequency Of Update
    Harvest Object Id 4dbdf6be-7d84-4b3b-8dce-55859b08789e
    Harvest Source Id ba43549f-8268-499d-bec8-91b164cb168f
    Harvest Source Title NMFS NWFSC
    Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
    Lineage QA/QC
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-122.3062, 47.6449], [-122.2962, 47.6449], [-122.2962, 47.6549], [-122.3062, 47.6549], [-122.3062, 47.6449]]]}
    Progress underDevelopment
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2010-01-01

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