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ECA - Flood Prone Area

Published by City of Seattle ArcGIS Online | City of Seattle | Metadata Last Checked: February 28, 2026 | Last Modified: 2026-02-17
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.

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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;'>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.</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;'>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)&nbsp; regulations.</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;'>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.</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-colo
distribution 
                                            [
  {
    "@type": "dcat:Distribution",
    "title": "CSV",
    "mediaType": "text/csv",
    "downloadURL": "https://data-seattlecitygis.opendata.arcgis.com/api/download/v1/items/cfb00dc1043e4e0e87181b2ab6c59862/csv?layers=0"
  },
  {
    "@type": "dcat:Distribution",
    "title": "GeoJSON",
    "mediaType": "application/vnd.geo+json",
    "downloadURL": "https://data-seattlecitygis.opendata.arcgis.com/api/download/v1/items/cfb00dc1043e4e0e87181b2ab6c59862/geojson?layers=0"
  },
  {
    "@type": "dcat:Distribution",
    "title": "KML",
    "mediaType": "application/vnd.google-earth.kml+xml",
    "downloadURL": "https://data-seattlecitygis.opendata.arcgis.com/api/download/v1/items/cfb00dc1043e4e0e87181b2ab6c59862/kml?layers=0"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Shapefile",
    "mediaType": "application/zip",
    "downloadURL": "https://data-seattlecitygis.opendata.arcgis.com/api/download/v1/items/cfb00dc1043e4e0e87181b2ab6c59862/shapefile?layers=0"
  },
  {
    "@type": "dcat:Distribution",
    "title": "ArcGIS Hub Dataset",
    "mediaType": "text/html",
    "downloadURL": "https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::eca-flood-prone-area"
  },
  {
    "@type": "dcat:Distribution",
    "title": "ArcGIS GeoService",
    "mediaType": "application/json",
    "downloadURL": "https://services.arcgis.com/ZOyb2t4B0UYuYNYH/arcgis/rest/services/ECA_Flood_Prone_Areas/FeatureServer/0"
  }
]
identifier https://www.arcgis.com/home/item.html?id=cfb00dc1043e4e0e87181b2ab6c59862&sublayer=0
issued 2026-02-09
keyword 
                                            [
  "eca",
  "environmental",
  "landuse",
  "planning",
  "sdci",
  "seattle gis open data"
]
landingPage https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::eca-flood-prone-area
modified 2026-02-17
publisher 
                                            {
  "name": "City of Seattle ArcGIS Online",
  "@type": "org:Organization"
}
spatial -122.4344,47.4927,-122.2729,47.7356
theme 
                                            [
  "geospatial"
]
title ECA - Flood Prone Area

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