Iowa Department of TransportationBridge and structure locations in Iowa. See NBI Guide for more info about this data set and how to use the National Bridge Inventory (NBI) fields. The data provided is based on the last inspection performed within the past 24 months and may not be included in the official data published by the Federal Highway Administration (FHWA). Data should not be used for decision making, as certain data values may not reflect current conditions. For official dataset, visit FHWA For data questions, please contact Iowa DOTArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/c984dfeb9a6f455791f9a8fc021f7ee2_1engIowaDOT Open DataPublicBridge Line [Iowa]Web servicesIowaLast Modified: 2026-01-08