US 20 WB over Little Sioux River
FairWoodbury County, Iowa · 0.4 Mi. W of Jct. Ia 31 · Structure no. 000000000700230
- Built
- 2016
- 9 years old
- Condition
- Fair
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 493 ft
- 4 main spans
- Daily traffic
- 3,250
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 20 WB over Little Sioux River is a prestressed concrete stringer/multi-beam or girder carrying US 20 WB over Little Sioux River in Woodbury County, Iowa. It was built in 2016, so it is 9 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 3,250 vehicles a day, roughly 26% of them trucks, projected to reach 3,250 by 2044. The structure is 493 ft (150.2 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 20 WB over Little Sioux River built?
It was built in 2016, making it 9 years old in 2025.
What condition is US 20 WB over Little Sioux 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 March 2024.
How much traffic does US 20 WB over Little Sioux River carry?
About 3,250 vehicles per day (2022 count), of which roughly 26% are trucks.
How long is US 20 WB over Little Sioux River?
The structure is 493 ft (150.2 m) long with a longest span of 122 ft (37.2 m) and a deck 43 ft wide.
Who owns US 20 WB over Little Sioux River?
It is owned by the State Highway Agency.