Washington State Department of Transportation (WSDOT): Headquarters and Northwest Region Maintenace OfficesThis feature class contains environmentally sensitive areas that front state highways, including wetlands, waterbodies, streams, and channel migration zones. Roadway segments within 300 feet of a sensitive area were located using GPS. The sensitive areas are represented by lines segments which have had their beginning and ending points buffered an additional 300 feet. Data has been synchronized to the LRS December, 31 2017.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/c708b0de40e94d5392be2f10b840e0fb_8engState of Washington Geospatial Open Data PortalPublicWSDOT - Sensitive Aquatic Areas [Washington (State)]Web servicesWashington (State)Last Modified: 2025-10-07