City of Portland, OregonPolygons representing the footprint of bridges and overpasses in Portland. The attribute information includes details on the owner, maintainer, type of bridge, and seismic information. -- Additional Information: Category: Transportation - Assets Purpose: For mapping and analysis related to the maintenance and management of bridges and overpasses in Portland. Update Frequency: Weekly -- Metadata Link: https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=52776ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/b4c4c6311be04a06ba004ee7608ba1c0_79engPortlandMaps Open DataPublicBridges [Oregon--Portland]Web servicesOregon--PortlandOregonLast Modified: 2026-01-08