US 20 over Drainage Ditch
FairBlack Hawk County, Iowa · 1.3 Mi. W of Jct. SR V65 · Structure no. 000000000604970
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected February 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 33 ft
- 3 main spans
- Daily traffic
- 10,700
- 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 Black Hawk County, Iowa. It was built in 1980, so it is 45 years old, younger 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 10,700 vehicles a day, roughly 21% of them trucks, projected to reach 10,700 by 2044. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 1.9 mi (3 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 1980, making it 45 years old in 2025.
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 10,700 vehicles per day (2022 count), of which roughly 21% are trucks.
How long is US 20 over Drainage Ditch?
The structure is 33 ft (10.1 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.