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320TH St over E Br Wapsinonoc CR

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

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

320TH St over E Br Wapsinonoc CR in Cedar County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1975, making it 50 years old at the 2025 inventory.
It carries about 90 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 60 of the 300 inventoried bridges in Cedar County rated poor (20.0%); 60 (20.0%) 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


Structure	Steel stringer or multi-beam girder
Length	about 40 ft
Location	079032901
NBI structure number	000000000101981
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
I-80 over Stream	1960	39,700	Fair
I-80 over Stream	1960	39,700	Fair
I-80 over Middle Wapsinonoc Creek	1960	39,700	Fair
I-80 over Drainage Ditch	1959	36,000	Fair
I-80 over Little Elkhorn Creek	1959	36,000	Fair
I-80 over Drainage Ditch	1960	36,000	Fair