Ia 146 over Drainage Ditch
GoodMarshall County, Iowa · 2.5 Miles S of JCT US 30 · Structure no. 000000000035501
- Built
- 1979
- 46 years old
- Condition
- Good
- inspected April 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 25 ft
- 2 main spans
- Daily traffic
- 2,200
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 146 over Drainage Ditch is a concrete continuous culvert carrying Ia 146 over Drainage Ditch in Marshall County, Iowa. It was built in 1979, so it is 46 years old, older 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 2,200 vehicles a day, roughly 10% of them trucks, projected to reach 2,200 by 2043. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 8.1 mi (13 km).
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 Ia 146 over Drainage Ditch built?
It was built in 1979, making it 46 years old in 2025.
What condition is Ia 146 over Drainage Ditch 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 April 2023.
How much traffic does Ia 146 over Drainage Ditch carry?
About 2,200 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is Ia 146 over Drainage Ditch?
The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).
Who owns Ia 146 over Drainage Ditch?
It is owned by the State Highway Agency.