Baltimore County GovernmentFeature class contains all hydrology lines for Baltimore County. Lines were compiled from aerial photography.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/9cf187a3d0d444ffaae25cc8720d41eb_0engBaltimore County Open Data PortalPublicHydrology Lines [Maryland--Baltimore County]Web servicesMaryland--Baltimore CountyMarylandLast Modified: 2025-11-12