FM 450th ST over Little Sioux River
FairCherokee County, Iowa · 093392103 · Structure no. 000000000109521
- Built
- 1988
- 37 years old
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 426 ft
- 5 main spans
- Daily traffic
- 419
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM 450th ST over Little Sioux River is a prestressed concrete stringer/multi-beam or girder carrying FM 450th ST over Little Sioux River in Cherokee County, Iowa. It was built in 1988, so it is 37 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 419 vehicles a day, roughly 30% of them trucks, projected to reach 419 by 2043. The structure is 426 ft (129.8 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 FM 450th ST over Little Sioux River built?
It was built in 1988, making it 37 years old in 2025.
What condition is FM 450th ST over Little 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 August 2023.
How much traffic does FM 450th ST over Little Sioux River carry?
About 419 vehicles per day (2022 count), of which roughly 30% are trucks.
How long is FM 450th ST over Little Sioux River?
The structure is 426 ft (129.8 m) long with a longest span of 97 ft (29.6 m) and a deck 33 ft wide.
Who owns FM 450th ST over Little Sioux River?
It is owned by the County Highway Agency.