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Local-520th St over Maple River

Cherokee County, Iowa · rated Good in the 2025 National Bridge Inventory

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

Local-520th St over Maple River in Cherokee County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
It was built in 2012, making it 13 years old at the 2025 inventory.
It carries about 26 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 86 of the 244 inventoried bridges in Cherokee County rated good (35.2%); 68 (27.9%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings

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

Bridge	Built	Vehicles/day	Condition
US 59 over Railroad Creek	1973	7,200	Fair
US 59 over Westcott Pk Loop	1972	4,510	Fair
US 59 over Little Sioux River	1973	4,510	Fair
W Bluff St over Railroad Creek	1961	3,529	Poor
Ia 3 over Fork Little Sioux River	1979	3,410	Fair
Ia 3 over Maple River	1985	3,270	Fair