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

    ECA Flood Prone Areas

    Metadata Updated: February 28, 2025

    FEMA flood prone areas with 100 foot buffer. Original flood prone areas where table digitized into the City of Seattle GIS CGDB control layer in the mid 90's. Layer may be used without the buffer by unselecting the flood = 1 feature type. This layer is used by the City as an aid to evaluate construction sites for the presence of flood prone areas pertinent to Environmentally Critical Areas (ECA)  regulations.
    Areas that would likely be covered with or carry water as a result of a one hundred (100) year flood event, or that would have a one percent (1%) or greater chance of being covered with or of carrying water in any given year based on current circumstances or maximum development permitted under existing zoning.
    For more information about the definition of flood prone areas, see Seattle Municipal Code section 25.09.012, Environmentally Critical Areas (ECA) definitions. 

    Updated as needed.

    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 16, 2023
    Metadata Updated Date February 28, 2025

    Metadata Source

    Harvested from Seattle JSON

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date July 16, 2023
    Metadata Updated Date February 28, 2025
    Publisher City of Seattle ArcGIS Online
    Maintainer
    Identifier https://www.arcgis.com/home/item.html?id=80c34d2b66e840c29ce92b74abbf13f0&sublayer=0
    Data First Published 2023-07-06
    Data Last Modified 2024-08-08
    Category geospatial
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://cos-data.seattle.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 53219b64-00d6-43b0-a054-d6447b485f3f
    Harvest Source Id f61de7a2-69cf-40a9-a1bc-dd9edb8f3fe5
    Harvest Source Title Seattle JSON
    Homepage URL https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::eca-flood-prone-areas-1
    Metadata Type geospatial
    Old Spatial -122.4344,47.4927,-122.2729,47.7356
    Source Datajson Identifier True
    Source Hash 882798740ebcff853903957daed16bdf3267239dac79c696813132a7aa8b005c
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -122.4344, 47.4927, -122.4344, 47.7356, -122.2729, 47.7356, -122.2729, 47.4927, -122.4344, 47.4927}

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