US 18 over Wapsipinicon Overflow
GoodChickasaw County, Iowa · 0.4 Mi. E of Jct. SR V14 · Structure no. 000000000019621
- Built
- 1978
- 47 years old
- Condition
- Good
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 93 ft
- 1 main span
- Daily traffic
- 2,280
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 18 over Wapsipinicon Overflow is a prestressed concrete stringer/multi-beam or girder carrying US 18 over Wapsipinicon Overflow in Chickasaw County, Iowa. It was built in 1978, so it is 47 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 2,280 vehicles a day, roughly 17% of them trucks, projected to reach 2,280 by 2043. The structure is 93 ft (28.3 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 over Wapsipinicon Overflow built?
It was built in 1978, making it 47 years old in 2025.
What condition is US 18 over Wapsipinicon Overflow in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.
How much traffic does US 18 over Wapsipinicon Overflow carry?
About 2,280 vehicles per day (2022 count), of which roughly 17% are trucks.
How long is US 18 over Wapsipinicon Overflow?
The structure is 93 ft (28.3 m) long with a longest span of 90 ft (27.4 m) and a deck 47 ft wide.
Who owns US 18 over Wapsipinicon Overflow?
It is owned by the State Highway Agency.