US 20 WB over US 71 SB & Ia 471
GoodSac County, Iowa · At Jct. of US 71 · Structure no. 000000000700070
- Built
- 2012
- 13 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 226 ft
- 3 main spans
- Daily traffic
- 2,195
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 20 WB over US 71 SB & Ia 471 is a prestressed concrete stringer/multi-beam or girder carrying US 20 WB over US 71 SB & Ia 471 in Sac County, Iowa. It was built in 2012, so it is 13 years old, younger 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 2,195 vehicles a day, roughly 44% of them trucks, projected to reach 2,195 by 2044. The structure is 226 ft (69 m) long and 43 ft wide.
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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 20 WB over US 71 SB & Ia 471 built?
It was built in 2012, making it 13 years old in 2025.
What condition is US 20 WB over US 71 SB & Ia 471 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 August 2024.
How much traffic does US 20 WB over US 71 SB & Ia 471 carry?
About 2,195 vehicles per day (2022 count), of which roughly 44% are trucks.
How long is US 20 WB over US 71 SB & Ia 471?
The structure is 226 ft (69 m) long with a longest span of 107 ft (32.5 m) and a deck 43 ft wide.
Who owns US 20 WB over US 71 SB & Ia 471?
It is owned by the State Highway Agency.