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ECA - Riparian Corridor

Published by City of Seattle ArcGIS Online | City of Seattle | Catalog Last Checked: February 28, 2026 at 08:30 PM | Dataset Last Updated: February 17, 2026
Displays areas with Riparian Corridors in the City of Seattle. See Ordinance Number: 122738. A polygon feature class showing Riparian Corridors in Seattle. Used to implement and regulate the City of Seattle's Environmentally Critical Areas (ECA) policies.   The riparian corridor includes the riparian watercourse and the riparian management area. The riparian watercourse is the watercourse of Type F, Np, and Ns waters defined in WAC 222-16-030 and 222-16-031 that have fish or wildlife habitat. The riparian management area is the area within 100 feet of the riparian watercourse measured horizontally landward from the ordinary high water mark of the watercourse as surveyed in the field, or from the top of the bank if the ordinary high water mark cannot be determined. 

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Complete Metadata
@type dcat:Dataset
accessLevel public
contactPoint 
                                            {
  "fn": "SDCI_SeattleCityGIS",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:mapgis.mapgis@seattle.gov"
}
description <div style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; line-height:1.5; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>Displays areas with Riparian Corridors in the City of Seattle. See Ordinance Number: 122738.</div><div style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; line-height:1.5; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>&nbsp;</div><div style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; line-height:1.5; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>A polygon feature class showing Riparian Corridors in Seattle. Used to implement and regulate the City of Seattle's Environmentally Critical Areas (ECA) policies.&nbsp;&nbsp;</div><div style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; line-height:1.5; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>&nbsp;</div><div style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; line-height:1.5; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>The riparian corridor includes the riparian watercourse and the riparian management area. The riparian watercourse is the watercourse of Type F, Np, and Ns waters defined in WAC 222-16-030 and 222-16-031 that have fish or wildlife habitat. The riparian management area is the area within 100 feet of the riparian watercourse measured horizontally landward from the ordinary high water mark of the watercourse as surveyed in the field, or from the top of the bank if the ordinary high water mark cannot be determined.&nbsp;</div><div style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:no
distribution 
                                            [
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  {
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    "mediaType": "application/vnd.google-earth.kml+xml",
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  },
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  },
  {
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  },
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    "title": "ArcGIS GeoService",
    "mediaType": "application/json",
    "downloadURL": "https://services.arcgis.com/ZOyb2t4B0UYuYNYH/arcgis/rest/services/Environmentally_Critical_Areas_Riparian_Corridors/FeatureServer/8"
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]
identifier https://www.arcgis.com/home/item.html?id=8219694473704b76bcb01308bfd9de36&sublayer=8
issued 2025-12-27
keyword 
                                            [
  "eca",
  "environmental",
  "landuse",
  "planning",
  "sdci",
  "seattle gis open data"
]
landingPage https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::eca-riparian-corridor
modified 2026-02-17
publisher 
                                            {
  "name": "City of Seattle ArcGIS Online",
  "@type": "org:Organization"
}
spatial -122.4213,47.4900,-122.2496,47.7556
theme 
                                            [
  "geospatial"
]
title ECA - Riparian Corridor

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