Ia 3 over Big Sioux River
GoodPlymouth County, Iowa · 1.5 Mi. W of W Jct. Ia 12 · Structure no. 000000000039651
- Built
- 2010
- 15 years old
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 506 ft
- 5 main spans
- Daily traffic
- 1,570
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 3 over Big Sioux River is a prestressed concrete stringer/multi-beam or girder carrying Ia 3 over Big Sioux River in Plymouth County, Iowa. It was built in 2010, so it is 15 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 1,570 vehicles a day, roughly 29% of them trucks, projected to reach 1,570 by 2044. The structure is 506 ft (154.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ia 3 over Big Sioux River built?
It was built in 2010, making it 15 years old in 2025.
What condition is Ia 3 over Big Sioux River 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 3 over Big Sioux River carry?
About 1,570 vehicles per day (2022 count), of which roughly 29% are trucks.
How long is Ia 3 over Big Sioux River?
The structure is 506 ft (154.2 m) long with a longest span of 122 ft (37.2 m) and a deck 43 ft wide.
Who owns Ia 3 over Big Sioux River?
It is owned by the State Highway Agency.