US 6 over Drainage
FairJohnson County, Iowa · 0.48 MI W of I380 · Structure no. 000000000701285
- Built
- 1948
- 77 years old
- Condition
- Fair
- inspected October 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 25 ft
- 3 main spans
- Daily traffic
- 11,400
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 6 over Drainage is a concrete continuous culvert carrying US 6 over Drainage in Johnson County, Iowa. It was built in 1948, so it is 77 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 11,400 vehicles a day, roughly 5% of them trucks, projected to reach 11,400 by 2044. The structure is 25 ft (7.6 m) long and 49 ft wide. 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 | 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 6 over Drainage built?
It was built in 1948, making it 77 years old in 2025.
What condition is US 6 over Drainage 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 October 2024.
How much traffic does US 6 over Drainage carry?
About 11,400 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is US 6 over Drainage?
The structure is 25 ft (7.6 m) long with a longest span of 8 ft (2.4 m) and a deck 49 ft wide.
Who owns US 6 over Drainage?
It is owned by the State Highway Agency.