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400TH St over Branch Iowa River

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

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

400TH St over Branch Iowa River in Poweshiek County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
It was built in 2014, making it 11 years old at the 2025 inventory.
It carries about 15 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 66 of the 243 inventoried bridges in Poweshiek County rated good (27.2%); 95 (39.1%) 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	Timber stringer or multi-beam girder
Length	about 20 ft
Location	081140103
NBI structure number	000000000294242
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-80 over N.fk. English River	1963	28,500	Fair
I-80 over No Fork English River	1963	28,500	Fair
EB I-80 over 50TH Street	1963	14,250	Fair
I 80 WB over UP RR	2023	14,000	Good
WB I-80 over 50TH Street	1963	14,000	Fair
EB I-80 over SR V18	1963	13,600	Fair