480th over Big Cedar River
FairMitchell County, Iowa · 100182801 · Structure no. 000000000249211
- Built
- 1979
- 46 years old
- Condition
- Fair
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 294 ft
- 4 main spans
- Daily traffic
- 216
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
480th over Big Cedar River is a prestressed concrete stringer/multi-beam or girder carrying 480th over Big Cedar River in Mitchell County, Iowa. It was built in 1979, so it is 46 years old, older 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 216 vehicles a day, roughly 8% of them trucks, projected to reach 216 by 2043. The structure is 294 ft (89.6 m) long and 32 ft wide. If it were closed, the detour would be 16.2 mi (26 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 480th over Big Cedar River built?
It was built in 1979, making it 46 years old in 2025.
What condition is 480th over Big Cedar 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 December 2023.
How much traffic does 480th over Big Cedar River carry?
About 216 vehicles per day (2022 count), of which roughly 8% are trucks.
How long is 480th over Big Cedar River?
The structure is 294 ft (89.6 m) long with a longest span of 76 ft (23.2 m) and a deck 32 ft wide.
Who owns 480th over Big Cedar River?
It is owned by the County Highway Agency.