US 18 & 52 over Natural Stream
GoodClayton County, Iowa · 0.6 Mi. W of E Jct. US 52 · Structure no. 000000000020480
- Built
- 1967
- 58 years old, rebuilt 2023
- Condition
- Good
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 298 ft
- 4 main spans
- Daily traffic
- 3,780
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US 18 & 52 over Natural Stream is a steel continuous stringer/multi-beam or girder carrying US 18 & 52 over Natural Stream in Clayton County, Iowa. It was built in 1967 and reconstructed in 2023, so it is 58 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 3,780 vehicles a day, roughly 20% of them trucks, projected to reach 3,780 by 2043. The structure is 298 ft (90.8 m) long and 35 ft wide. If it were closed, the detour would be 21.7 mi (35 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 18 & 52 over Natural Stream built?
It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2023.
What condition is US 18 & 52 over Natural Stream 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 June 2023.
How much traffic does US 18 & 52 over Natural Stream carry?
About 3,780 vehicles per day (2021 count), of which roughly 20% are trucks.
How long is US 18 & 52 over Natural Stream?
The structure is 298 ft (90.8 m) long with a longest span of 82 ft (25 m) and a deck 35 ft wide.
Who owns US 18 & 52 over Natural Stream?
It is owned by the State Highway Agency.