320th ST over Clear Creek
GoodMarshall County, Iowa · 082202903 · Structure no. 000000000242251
- Built
- 2017
- 8 years old
- Condition
- Good
- inspected November 2023
- Type
- Slab
- Concrete Continuous
- Length
- 111 ft
- 3 main spans
- Daily traffic
- 69
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
320th ST over Clear Creek is a concrete continuous slab carrying 320th ST over Clear Creek in Marshall County, Iowa. It was built in 2017, so it is 8 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 69 vehicles a day, projected to reach 69 by 2043. The structure is 111 ft (33.8 m) long and 33 ft wide. 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 320th ST over Clear Creek built?
It was built in 2017, making it 8 years old in 2025.
What condition is 320th ST over Clear 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 November 2023.
How much traffic does 320th ST over Clear Creek carry?
About 69 vehicles per day (2022 count).
How long is 320th ST over Clear Creek?
The structure is 111 ft (33.8 m) long with a longest span of 43 ft (13.1 m) and a deck 33 ft wide.
Who owns 320th ST over Clear Creek?
It is owned by the County Highway Agency.