Low clearance bridges on Idaho interstates and US highways
10 spots where an interstate or US highway in Idaho has less than 16 ft of clearance. The lowest is 14 ft 6 in on US-12, In Lewiston at State Line. 3 are under 15 ft.
Posted signs and your permit come first. These are the clearances Idaho reported to the federal National Bridge Inventory in 2025. Repaving, snow and new work can lower them.
