US 20 over Drainage Ditch #4
GoodWebster County, Iowa · At Jct. SR P73 · Structure no. 000000000605760
- Built
- 1986
- 39 years old
- Condition
- Good
- inspected July 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 30 ft
- 2 main spans
- Daily traffic
- 9,500
- 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 Webster County, Iowa. It was built in 1986, so it is 39 years old, younger 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 9,500 vehicles a day, roughly 26% of them trucks, projected to reach 9,500 by 2042. The structure is 30 ft (9.1 m) long.
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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 20 over Drainage Ditch #4 built?
It was built in 1986, making it 39 years old in 2025.
What condition is US 20 over Drainage Ditch #4 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 July 2023.
How much traffic does US 20 over Drainage Ditch #4 carry?
About 9,500 vehicles per day (2022 count), of which roughly 26% are trucks.
How long is US 20 over Drainage Ditch #4?
The structure is 30 ft (9.1 m) long with a longest span of 14 ft (4.3 m).
Who owns US 20 over Drainage Ditch #4?
It is owned by the State Highway Agency.