US 20 over Drainage Ditch
FairDelaware County, Iowa · 2.3 Mi. E of Jct. Ia 38 · Structure no. 000000000023100
- Built
- 1963
- 62 years old, rebuilt 1986
- Condition
- Fair
- inspected February 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 21 ft
- 2 main spans
- Daily traffic
- 9,000
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 20 over Drainage Ditch is a concrete continuous culvert carrying US 20 over Drainage Ditch in Delaware County, Iowa. It was built in 1963 and reconstructed in 1986, so it is 62 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 9,000 vehicles a day, roughly 25% of them trucks, projected to reach 9,000 by 2044. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.2 mi (2 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 20 over Drainage Ditch built?
It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1986.
What condition is US 20 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 February 2024.
How much traffic does US 20 over Drainage Ditch carry?
About 9,000 vehicles per day (2022 count), of which roughly 25% are trucks.
How long is US 20 over Drainage Ditch?
The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).
Who owns US 20 over Drainage Ditch?
It is owned by the State Highway Agency.