400th Street over Small Run
GoodPottawattamie County, Iowa · 075401104 · Structure no. 000000000285781
- Built
- 1979
- 46 years old
- Condition
- Good
- inspected July 2023
- Type
- Culvert
- Steel
- Length
- 21 ft
- 1 main span
- Daily traffic
- 50
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
400th Street over Small Run is a steel culvert carrying 400th Street over Small Run in Pottawattamie County, Iowa. It was built in 1979, so it is 46 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 50 vehicles a day, projected to reach 50 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 400th Street over Small Run built?
It was built in 1979, making it 46 years old in 2025.
What condition is 400th Street over Small Run in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.
How much traffic does 400th Street over Small Run carry?
About 50 vehicles per day (2022 count).
How long is 400th Street over Small Run?
The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m).
Who owns 400th Street over Small Run?
It is owned by the County Highway Agency.