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Local over Middle River

Adair County, Iowa · rated Poor in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Local over Middle River in Adair County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1958, making it 67 years old at the 2025 inventory.
It carries about 41 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 37 of the 303 inventoried bridges in Adair County rated poor (12.2%); 37 (12.2%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 78 ft
Location	077311701
NBI structure number	000000000057850
Condition class	Poor

Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.

Bridge	Built	Vehicles/day	Condition
I-80 over Drainage Ditch	1959	27,600	Fair
I-80 over Drainage Ditch	1959	27,600	Fair
I-80 over North River	1958	25,900	Fair
I-80 over Plunger Creek	1959	25,900	Fair
I-80 over Middle River	1958	24,800	Fair
I-80 over Drainage Ditch	1958	24,800	Fair