King CountyFor more information about this layer please see the GIS Data Catalog . The King County Sensitive Areas Ordinance (SAO) defines coal mine hazard areas as those areas directly underlain by or adjacent to or affected by abandoned coal mine workings such as adits ( a nearly horizontal entrance to a mine), drifts (a secondary passageway between two main shafts) tunnels, or air shafts.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/a933f871974d4b2da416d38b7bfd8b50_0engKing County GIS Open DataPublicCoal Mine Hazards [Washington (State)--King County]Web servicesWashington (State)--King CountyWashington (State)Last Modified: 2025-07-22