Home › Iowa › Adair County › Local over Nine Mile Run

Local over Nine Mile Run

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

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

Local over Nine Mile Run 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 substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1974, making it 51 years old at the 2025 inventory.
It carries about 46 vehicles a day (traffic count year 2022).
Its listed owner is the county 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 tee beam
Length	about 89 ft
Location	075303202
NBI structure number	000000000055741
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