WB US 20 over Wapsipinicon River
FairBuchanan County, Iowa · 1.5 Mi. E of Jct. Ia #150 · Structure no. 000000000603630
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 339 ft
- 4 main spans
- Daily traffic
- 4,150
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
WB US 20 over Wapsipinicon River is a prestressed concrete stringer/multi-beam or girder carrying WB US 20 over Wapsipinicon River in Buchanan 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 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 4,150 vehicles a day, roughly 25% of them trucks, projected to reach 4,150 by 2043. The structure is 339 ft (103.3 m) long and 44 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| 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 WB US 20 over Wapsipinicon River built?
It was built in 1978, making it 47 years old in 2025.
What condition is WB US 20 over Wapsipinicon 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 October 2023.
How much traffic does WB US 20 over Wapsipinicon River carry?
About 4,150 vehicles per day (2022 count), of which roughly 25% are trucks.
How long is WB US 20 over Wapsipinicon River?
The structure is 339 ft (103.3 m) long with a longest span of 96 ft (29.3 m) and a deck 44 ft wide.
Who owns WB US 20 over Wapsipinicon River?
It is owned by the State Highway Agency.