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

    Proposed Inlets

    Metadata Updated: March 8, 2026

    This layer displays all the catch basins, catch basin grated tops, sandboxes, junction boxes, inlets and trash racks within the City of Seattle (and the former service area north of the City limits) regardless of ownership. A catch basin is a connector to the storm drain system that typically includes an inlet where stormwater enters the catch basin and a sump to capture sediment, debris, and associated pollutants prior to the surface water flowing into a storm or sewer pipe. There are two main types of inlets: side inlets and grated inlets.  Side inlets are located adjacent to the curb and rely on the ability of the opening under the curb to capture flow. Grated inlets have gratings or metal grids to prevent large objects and debris from falling into the combined sewer or drainage system.  They collect surface runoff for conveyance in a pipe system. Sandboxes have wooden lids and are filled with sand or gravel and drain directly into the ground or to a culvert as part of the informal drainage system. Sandboxes are no longer being installed. Junction boxes are cement structure with a grated metal lid, shallow in depth, generally connect culverts and are inline as part of the informal ditch and culvert system.  Trash racks are grated structures that collect debris. Trash racks may be on maintenance holes, catch basins, other structures, or streams.
    Data source is DWW.catch_basin_pt_pv, and DWW.APPURTENANCE_PT_PV. Maintained by SPU GIS DWW Data Maintenance staff. This layer does not display when zoomed out beyond 1:899.
    Refreshed daily.

    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 March 8, 2026

    Metadata Source

    Harvested from Seattle JSON

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date February 28, 2025
    Metadata Updated Date March 8, 2026
    Publisher City of Seattle ArcGIS Online
    Maintainer
    Identifier https://www.arcgis.com/home/item.html?id=cb797633513d49c2a0d3482c6320579b&sublayer=8
    Data First Published 2024-04-29
    Data Last Modified 2026-03-06
    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 b3b77cb0-afae-4930-b7c2-62faf9ad9acf
    Harvest Source Id f61de7a2-69cf-40a9-a1bc-dd9edb8f3fe5
    Harvest Source Title Seattle JSON
    Homepage URL https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::proposed-inlets
    Metadata Type geospatial
    Old Spatial -122.4283,47.4790,-122.2379,47.7646
    Source Datajson Identifier True
    Source Hash cf0f45f1e9386445fefdd23cba2fcc12a776f94ffdd9819a39283e722ea8ea18
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -122.4283, 47.4790, -122.4283, 47.7646, -122.2379, 47.7646, -122.2379, 47.4790, -122.4283, 47.4790}

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