Ia 12 over Drainage
GoodSioux County, Iowa · 1.3 Mi. S of Jct. Ia 10 · Structure no. 000000000606885
- Built
- 1954
- 71 years old, rebuilt 1998
- Condition
- Good
- inspected May 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 21 ft
- 2 main spans
- Daily traffic
- 1,130
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 12 over Drainage is a concrete continuous culvert carrying Ia 12 over Drainage in Sioux County, Iowa. It was built in 1954 and reconstructed in 1998, so it is 71 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 1,130 vehicles a day, roughly 27% of them trucks, projected to reach 1,130 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.9 mi (3 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 | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ia 12 over Drainage built?
It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1998.
What condition is Ia 12 over Drainage 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 May 2024.
How much traffic does Ia 12 over Drainage carry?
About 1,130 vehicles per day (2023 count), of which roughly 27% are trucks.
How long is Ia 12 over Drainage?
The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).
Who owns Ia 12 over Drainage?
It is owned by the State Highway Agency.