FM over Big Sioux River
FairSioux County, Iowa · 096471803 · Structure no. 000000000312181
- Built
- 2009
- 16 years old
- Condition
- Fair
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 495 ft
- 6 main spans
- Daily traffic
- 1,277
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Big Sioux River is a prestressed concrete continuous stringer/multi-beam or girder carrying FM over Big Sioux River in Sioux County, Iowa. It was built in 2009, so it is 16 years old, younger 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 5 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 1,277 vehicles a day, roughly 32% of them trucks, projected to reach 1,277 by 2043. The structure is 495 ft (150.9 m) long and 32 ft wide. If it were closed, the detour would be 11.8 mi (19 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 | 8 Very Good | No problems noted. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM over Big Sioux River built?
It was built in 2009, making it 16 years old in 2025.
What condition is FM over Big Sioux River 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 FM over Big Sioux River carry?
About 1,277 vehicles per day (2022 count), of which roughly 32% are trucks.
How long is FM over Big Sioux River?
The structure is 495 ft (150.9 m) long with a longest span of 82 ft (25.1 m) and a deck 32 ft wide.
Who owns FM over Big Sioux River?
It is owned by the County Highway Agency.