US 18 over Drainage Ditch
FairClay County, Iowa · At the JCT of SR N14 · Structure no. 000000000020380
- Built
- 1965
- 60 years old, rebuilt 1994
- Condition
- Fair
- inspected December 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 29 ft
- 2 main spans
- Daily traffic
- 4,270
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 18 over Drainage Ditch is a concrete continuous culvert carrying US 18 over Drainage Ditch in Clay County, Iowa. It was built in 1965 and reconstructed in 1994, so it is 60 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 4,270 vehicles a day, roughly 16% of them trucks, projected to reach 4,270 by 2043. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 14.3 mi (23 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 18 over Drainage Ditch built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1994.
What condition is US 18 over Drainage Ditch in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2023.
How much traffic does US 18 over Drainage Ditch carry?
About 4,270 vehicles per day (2022 count), of which roughly 16% are trucks.
How long is US 18 over Drainage Ditch?
The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m).
Who owns US 18 over Drainage Ditch?
It is owned by the State Highway Agency.