D.C. Office of the Chief Technology OfficerBridges, overpasses, tunnel entrances, and underpasses captured in 1999. This dataset was collected as part of the planimetric mapping project. Hidden features were added as enhancements to this dataset.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/168af65cd07445129af50b65b5c8663a_23engOpen Data DCPublicBridge and Tunnel Entrances 1999 [District of Columbia--Washington]Web servicesDistrict of Columbia--WashingtonDistrict of Columbia1999