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B25 Chestnut St over Cota Creek

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

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

B25 Chestnut St over Cota Creek in Allamakee 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 2021, making it 4 years old at the 2025 inventory.
It carries about 420 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 62 of the 197 inventoried bridges in Allamakee County rated good (31.5%); 21 (10.7%) 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


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 109 ft
Location	0.1 mi W great river rd
NBI structure number	000000000005971
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Ia 9 over Stream	1967	3,670	Fair
Ia 51 over Hecher Creek	1967	2,690	Good
Ia 51 over Yellow River	1967	2,690	Good
Front St over Clear Creek	1985	2,418	Good
Ia 76 over Yellow River	1980	2,370	Fair
Ia 76 over Drainage Ditch	1996	2,370	Good