US 18 WB over Winnebago River & Road
FairCerro Gordo County, Iowa · 0.7 Mi. E of Jct. SR S56 · Structure no. 000000000606455
- Built
- 1998
- 27 years old
- Condition
- Fair
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 299 ft
- 3 main spans
- Daily traffic
- 5,500
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 18 WB over Winnebago River & Road is a prestressed concrete stringer/multi-beam or girder carrying US 18 WB over Winnebago River & Road in Cerro Gordo County, Iowa. It was built in 1998, so it is 27 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 5,500 vehicles a day, roughly 27% of them trucks, projected to reach 5,500 by 2044. The structure is 299 ft (91.1 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 18 WB over Winnebago River & Road built?
It was built in 1998, making it 27 years old in 2025.
What condition is US 18 WB over Winnebago River & Road 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 March 2024.
How much traffic does US 18 WB over Winnebago River & Road carry?
About 5,500 vehicles per day (2022 count), of which roughly 27% are trucks.
How long is US 18 WB over Winnebago River & Road?
The structure is 299 ft (91.1 m) long with a longest span of 131 ft (39.9 m) and a deck 42 ft wide.
Who owns US 18 WB over Winnebago River & Road?
It is owned by the State Highway Agency.