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Ia 220 over Overflow Iowa River

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

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

Ia 220 over Overflow Iowa River in Iowa County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1978, making it 47 years old at the 2025 inventory.
It carries about 1,050 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 104 of the 239 inventoried bridges in Iowa County rated fair (43.5%); 45 (18.8%) 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 422 ft
Location	2.0 Mi. N of Jct. US 6
NBI structure number	000000000029661
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 over Clear Creek	1963	33,800	Good
I 80 over Stream	1963	33,000	Fair
I-80 over No Name Creek	1963	31,400	Fair
I-80 over Stream	1962	30,300	Fair
I-80 over Old Mans Creek	1962	30,100	Fair
I-80 over Stream	1961	29,700	Good