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WB I-80 over Antique Country Dr.

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

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

WB I-80 over Antique Country Dr. in Adair 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 5 (fair condition) on the 0-9 scale.
It was built in 1958, making it 67 years old at the 2025 inventory.
It carries about 12,150 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 121 of the 303 inventoried bridges in Adair County rated fair (39.9%); 37 (12.2%) 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 124 ft
Location	3.5 Mi. W of Jct. Ia 25
NBI structure number	000000000013170
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 Drainage Ditch	1959	27,600	Fair
I-80 over Drainage Ditch	1959	27,600	Fair
I-80 over North River	1958	25,900	Fair
I-80 over Plunger Creek	1959	25,900	Fair
I-80 over Middle River	1958	24,800	Fair
I-80 over Drainage Ditch	1958	24,800	Fair