320th Street over Silver Creek
GoodPottawattamie County, Iowa · 075410902 · Structure no. 000000000286151
- Built
- 2016
- 9 years old
- Condition
- Good
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 32 ft
- 1 main span
- Daily traffic
- 20
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
320th Street over Silver Creek is a concrete stringer/multi-beam or girder carrying 320th Street over Silver Creek in Pottawattamie County, Iowa. It was built in 2016, so it is 9 years old, younger 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 20 vehicles a day, projected to reach 20 by 2043. The structure is 32 ft (9.8 m) long and 257 ft wide.
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 |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 320th Street over Silver Creek built?
It was built in 2016, making it 9 years old in 2025.
What condition is 320th Street over Silver Creek 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 320th Street over Silver Creek carry?
About 20 vehicles per day (2022 count).
How long is 320th Street over Silver Creek?
The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m) and a deck 257 ft wide.
Who owns 320th Street over Silver Creek?
It is owned by the County Highway Agency.