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FM over Des Moines River

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

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

FM over Des Moines River in Boone County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 0 (failed condition, out of service) on the 0-9 scale.
It was built in 1909, making it 116 years old at the 2025 inventory.
It carries about 80 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 38 of the 134 inventoried bridges in Boone County rated poor (28.4%); 38 (28.4%) 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

Component	Rating (2025)	FHWA scale meaning
Deck	0	Failed condition, out of service
Superstructure	0	Failed condition, out of service
Substructure	0	Failed condition, out of service

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

Bridge	Built	Vehicles/day	Condition
US 30 over Noah Creek	1962	8,800	Fair
US 30 over Honey Creek	1962	8,800	Fair
US 30 & 169 over East Beaver Creek	1962	5,900	Good
Ia 17 over Big Creek	1961	5,300	Fair
Ia 17 over US 30	1968	4,960	Fair
US 30 EB over Des Moines River	1963	4,400	Fair