US 18 over Floyd River
FairSioux County, Iowa · 0.2 W of Jct. SR L26 · Structure no. 000000000048351
- Built
- 1992
- 33 years old
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 209 ft
- 3 main spans
- Daily traffic
- 5,100
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 18 over Floyd River is a concrete stringer/multi-beam or girder carrying US 18 over Floyd River in Sioux County, Iowa. It was built in 1992, so it is 33 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 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 5,100 vehicles a day, roughly 17% of them trucks, projected to reach 5,100 by 2042. The structure is 209 ft (63.7 m) long and 47 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 18 over Floyd River built?
It was built in 1992, making it 33 years old in 2025.
What condition is US 18 over Floyd 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 April 2023.
How much traffic does US 18 over Floyd River carry?
About 5,100 vehicles per day (2022 count), of which roughly 17% are trucks.
How long is US 18 over Floyd River?
The structure is 209 ft (63.7 m) long with a longest span of 69 ft (21 m) and a deck 47 ft wide.
Who owns US 18 over Floyd River?
It is owned by the State Highway Agency.