480th ST over Small
FairJohnson County, Iowa · 078061201 · Structure no. 000000000203241
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected April 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 23 ft
- 2 main spans
- Daily traffic
- 81
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
480th ST over Small is a concrete continuous culvert carrying 480th ST over Small in Johnson County, Iowa. It was built in 1978, so it is 47 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 81 vehicles a day, projected to reach 81 by 2043. The structure is 23 ft (7 m) long. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 480th ST over Small built?
It was built in 1978, making it 47 years old in 2025.
What condition is 480th ST over Small in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.
How much traffic does 480th ST over Small carry?
About 81 vehicles per day (2021 count).
How long is 480th ST over Small?
The structure is 23 ft (7 m) long with a longest span of 11 ft (3.4 m).
Who owns 480th ST over Small?
It is owned by the County Highway Agency.