B45 over Unamed Creek
GoodClayton County, Iowa · At Jct. US 18 & SR B45 · Structure no. 000000000609270
- Built
- 1988
- 37 years old
- Condition
- Good
- inspected April 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 27 ft
- 2 main spans
- Daily traffic
- 10
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
B45 over Unamed Creek is a concrete continuous culvert carrying B45 over Unamed Creek in Clayton County, Iowa. It was built in 1988, so it is 37 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 10 vehicles a day, roughly 3% of them trucks, projected to reach 10 by 2042. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 1.2 mi (2 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 | 9 Excellent | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was B45 over Unamed Creek built?
It was built in 1988, making it 37 years old in 2025.
What condition is B45 over Unamed 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 2023.
How much traffic does B45 over Unamed Creek carry?
About 10 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is B45 over Unamed Creek?
The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).
Who owns B45 over Unamed Creek?
It is owned by the State Highway Agency.