King CountyFor more information about this layer please see the GIS Data Catalog . A seawall (or sea wall) is a form of coastal defense constructed where the sea, and associated coastal processes, impact directly upon the landforms of the coast. The purpose of a seawall is to protect areas of human habitation, conservation and leisure activities from the action of tides and waves. As a seawall is a static feature it will conflict with the dynamic nature of the coast and impede the exchange of sediment between land and sea.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/d37cbcd3933f4ce886bd685780bedf59_0engKing County GIS Open DataPublicSeawall maintained by King County Roads Division [Washington (State)--King County]Web servicesWashington (State)--King CountyWashington (State)Last Modified: 2025-08-04