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

    SPU DWW Proposed Underdrains & Rain Gardens

    Metadata Updated: January 17, 2026

    The DWW (Drainage and Waste Water) GSI (Green Stormwater Infrastructure) layer consists of line and polygon representations of the following features: Swales (biofiltration, bioretention, biofiltration/bioretention, and conveyance) are generally shallow depressions with a designed mix of soil and plants which break down pollutants through natural processes while reducing runoff. Permeable pavement is a paving system which allows rainfall to percolate into an underlying soil or aggregate storage reservoir. Underdrain piping systems are provided to prevent prolonged ponding of stormwater or to collect and convey water to another facility. Rain gardens are less engineered systems that are designed to mitigate water from the sidewalk only and have two inches or less of ponded depth. The drainage structures represented in the GSI points are not all unique to GSI, however, they are specifically part of SPU GSI projects.The data is being refreshed weekly.

    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 February 28, 2025
    Metadata Updated Date January 17, 2026

    Metadata Source

    Harvested from Seattle JSON

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date February 28, 2025
    Metadata Updated Date January 17, 2026
    Publisher City of Seattle ArcGIS Online
    Maintainer
    Identifier https://www.arcgis.com/home/item.html?id=5e36e5442b184e81b975a34d9fde4b82&sublayer=11
    Data First Published 2024-06-25
    Data Last Modified 2026-01-15
    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 e28665df-a5a8-4434-a24a-1a19745061ca
    Harvest Source Id f61de7a2-69cf-40a9-a1bc-dd9edb8f3fe5
    Harvest Source Title Seattle JSON
    Homepage URL https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::spu-dww-proposed-underdrains-rain-gardens-1
    Metadata Type geospatial
    Old Spatial -122.4250,47.3693,-121.6971,47.8609
    Source Datajson Identifier True
    Source Hash 03693f7402f75d67283c3f0a44e2edb39d4916006b68a1c2761c3dc15b95748a
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -122.4250, 47.3693, -122.4250, 47.8609, -121.6971, 47.8609, -121.6971, 47.3693, -122.4250, 47.3693}

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