B Avenue over US 20
GoodGrundy County, Iowa · 4.0 Miles W of JCT SR T19 · Structure no. 000000000608505
- Built
- 2003
- 22 years old
- Condition
- Good
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 234 ft
- 2 main spans
- Daily traffic
- 59
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
B Avenue over US 20 is a prestressed concrete stringer/multi-beam or girder carrying B Avenue over US 20 in Grundy County, Iowa. It was built in 2003, so it is 22 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 59 vehicles a day, projected to reach 59 by 2044. The structure is 234 ft (71.3 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was B Avenue over US 20 built?
It was built in 2003, making it 22 years old in 2025.
What condition is B Avenue over US 20 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 January 2024.
How much traffic does B Avenue over US 20 carry?
About 59 vehicles per day (2022 count).
How long is B Avenue over US 20?
The structure is 234 ft (71.3 m) long with a longest span of 116 ft (35.4 m) and a deck 33 ft wide.
Who owns B Avenue over US 20?
It is owned by the State Highway Agency.