US 71 & Ia 9 over East Okoboji Lake
FairDickinson County, Iowa · 1.7 Mi. N of S Jct. Ia 9 · Structure no. 000000000023680
- Built
- 1939
- 86 years old, rebuilt 1979
- Condition
- Fair
- inspected February 2023
- Type
- Tee Beam
- Concrete
- Length
- 64 ft
- 1 main span
- Daily traffic
- 8,200
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 71 & Ia 9 over East Okoboji Lake is a concrete tee beam carrying US 71 & Ia 9 over East Okoboji Lake in Dickinson County, Iowa. It was built in 1939 and reconstructed in 1979, so it is 86 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 8,200 vehicles a day, roughly 7% of them trucks, projected to reach 8,200 by 2042. The structure is 64 ft (19.5 m) long and 78 ft wide. If it were closed, the detour would be 1.9 mi (3 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 |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 71 & Ia 9 over East Okoboji Lake built?
It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1979.
What condition is US 71 & Ia 9 over East Okoboji Lake 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 February 2023.
How much traffic does US 71 & Ia 9 over East Okoboji Lake carry?
About 8,200 vehicles per day (2022 count), of which roughly 7% are trucks.
How long is US 71 & Ia 9 over East Okoboji Lake?
The structure is 64 ft (19.5 m) long with a longest span of 39 ft (11.9 m) and a deck 78 ft wide.
Who owns US 71 & Ia 9 over East Okoboji Lake?
It is owned by the State Highway Agency.