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580TH St SE over Otter Creek

Johnson County, Iowa · rated Fair in the 2025 National Bridge Inventory

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

580TH St SE over Otter Creek in Johnson County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1964, making it 61 years old at the 2025 inventory.
It carries about 81 vehicles a day (traffic count year 2021).
Its listed owner is the county highway agency.
It is one of 186 of the 376 inventoried bridges in Johnson County rated fair (49.5%); 34 (9.0%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 43 ft
Location	077060101
NBI structure number	000000000202860
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I 80 EB over Iowa River	1960	32,900	Good
US 218 over Deer Creek	1970	32,400	Good
I 80 WB over Iowa River	1960	32,050	Good
EB I-80 over over US 6 & Iais RR	1995	31,000	Fair
I 80 WB over over US 6 & Iais RR	1992	31,000	Fair
EB I-80 over Cic Railway	1963	30,600	Fair