230th Ave over Negro Creek
GoodClinton County, Iowa · 082E32902 · Structure no. 000000000123621
- Built
- 1987
- 38 years old
- Condition
- Good
- inspected April 2024
- Type
- Slab
- Concrete Continuous
- Length
- 78 ft
- 3 main spans
- Daily traffic
- 360
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
230th Ave over Negro Creek is a concrete continuous slab carrying 230th Ave over Negro Creek in Clinton County, Iowa. It was built in 1987, so it is 38 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 360 vehicles a day, roughly 10% of them trucks, projected to reach 360 by 2044. The structure is 78 ft (23.8 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 230th Ave over Negro Creek built?
It was built in 1987, making it 38 years old in 2025.
What condition is 230th Ave over Negro 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 April 2024.
How much traffic does 230th Ave over Negro Creek carry?
About 360 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is 230th Ave over Negro Creek?
The structure is 78 ft (23.8 m) long with a longest span of 28 ft (8.5 m) and a deck 32 ft wide.
Who owns 230th Ave over Negro Creek?
It is owned by the County Highway Agency.