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FM over S. Fork Iowa River

Hardin County, Iowa · rated Fair in the 2025 National Bridge Inventory

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

FM over S. Fork Iowa River in Hardin County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1978, making it 47 years old at the 2025 inventory.
It carries about 88 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 85 of the 241 inventoried bridges in Hardin County rated fair (35.3%); 69 (28.6%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 204 ft
Location	087193002
NBI structure number	000000000175341
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 20 over Drainage	2003	9,800	Good
US 20 over Drainage	2003	9,200	Good
US 20 over Iowa River	2003	9,200	Good
US 65 over Iowa River	2011	7,800	Good
Washington St over Iowa River	1934	6,251	Fair
US 65 over Beaver Creek	1976	5,300	Good