FM-480th St. over Little Sioux River
PoorCherokee County, Iowa · 092400101 · Structure no. 000000000108870
- Built
- 1965
- 60 years old
- Condition
- Poor
- inspected July 2023
- Type
- Girder and Floorbeam System
- Steel Continuous
- Length
- 346 ft
- 3 main spans
- Daily traffic
- 60
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM-480th St. over Little Sioux River is a steel continuous girder and floorbeam system carrying FM-480th St. over Little Sioux River in Cherokee County, Iowa. It was built in 1965, so it is 60 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 3 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 60 vehicles a day, projected to reach 60 by 2043. The structure is 346 ft (105.5 m) long and 28 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM-480th St. over Little Sioux River built?
It was built in 1965, making it 60 years old in 2025.
What condition is FM-480th 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 July 2023.
How much traffic does FM-480th St. over Little Sioux River carry?
About 60 vehicles per day (2022 count).
How long is FM-480th St. over Little Sioux River?
The structure is 346 ft (105.5 m) long with a longest span of 133 ft (40.5 m) and a deck 28 ft wide.
Who owns FM-480th St. over Little Sioux River?
It is owned by the County Highway Agency.