Ia 9 over Little Sioux River
GoodDickinson County, Iowa · 3.7 Mi. W of Ia 86 · Structure no. 000000000023710
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected November 2024
- Type
- Slab
- Concrete Continuous
- Length
- 123 ft
- 3 main spans
- Daily traffic
- 4,310
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 9 over Little Sioux River is a concrete continuous slab carrying Ia 9 over Little Sioux River in Dickinson County, Iowa. It was built in 1971, so it is 54 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 4,310 vehicles a day, roughly 11% of them trucks, projected to reach 4,310 by 2044. The structure is 123 ft (37.5 m) long and 47 ft wide. 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ia 9 over Little Sioux River built?
It was built in 1971, making it 54 years old in 2025.
What condition is Ia 9 over Little 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 November 2024.
How much traffic does Ia 9 over Little Sioux River carry?
About 4,310 vehicles per day (2022 count), of which roughly 11% are trucks.
How long is Ia 9 over Little Sioux River?
The structure is 123 ft (37.5 m) long with a longest span of 47 ft (14.3 m) and a deck 47 ft wide.
Who owns Ia 9 over Little Sioux River?
It is owned by the State Highway Agency.