US 20 over Drainage Ditch #4
FairHamilton County, Iowa · 1.8 Miles East of US 69 · Structure no. 000000000026600
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected July 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 25 ft
- 2 main spans
- Daily traffic
- 9,600
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 20 over Drainage Ditch #4 is a concrete continuous culvert carrying US 20 over Drainage Ditch #4 in Hamilton County, Iowa. It was built in 1968, so it is 57 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 9,600 vehicles a day, roughly 27% of them trucks, projected to reach 9,600 by 2042. The structure is 25 ft (7.6 m) long.
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 #4 built?
It was built in 1968, making it 57 years old in 2025.
What condition is US 20 over Drainage Ditch #4 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 July 2023.
How much traffic does US 20 over Drainage Ditch #4 carry?
About 9,600 vehicles per day (2022 count), of which roughly 27% are trucks.
How long is US 20 over Drainage Ditch #4?
The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).
Who owns US 20 over Drainage Ditch #4?
It is owned by the State Highway Agency.