FM 280th ST over Little Sioux River
PoorClay County, Iowa · 097370701 · Structure no. 000000000117530
- Built
- 1966
- 59 years old
- Condition
- Poor
- inspected December 2024
- Type
- Slab
- Concrete Continuous
- Length
- 175 ft
- 4 main spans
- Daily traffic
- 270
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM 280th ST over Little Sioux River is a concrete continuous slab carrying FM 280th ST over Little Sioux River in Clay County, Iowa. It was built in 1966, so it is 59 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 270 vehicles a day, roughly 18% of them trucks, projected to reach 270 by 2042. The structure is 175 ft (53.3 m) long and 30 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 FM 280th ST over Little Sioux River built?
It was built in 1966, making it 59 years old in 2025.
What condition is FM 280th ST over Little Sioux River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.
How much traffic does FM 280th ST over Little Sioux River carry?
About 270 vehicles per day (2022 count), of which roughly 18% are trucks.
How long is FM 280th ST over Little Sioux River?
The structure is 175 ft (53.3 m) long with a longest span of 49 ft (14.9 m) and a deck 30 ft wide.
Who owns FM 280th ST over Little Sioux River?
It is owned by the County Highway Agency.