J Avenue over US 20
GoodGrundy County, Iowa · 4.0 Miles W of JCT Ia 14 · Structure no. 000000000608535
- Built
- 2003
- 22 years old
- Condition
- Good
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 224 ft
- 2 main spans
- Daily traffic
- 49
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
J Avenue over US 20 is a prestressed concrete stringer/multi-beam or girder carrying J 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 49 vehicles a day, roughly 20% of them trucks, projected to reach 49 by 2044. The structure is 224 ft (68.3 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was J Avenue over US 20 built?
It was built in 2003, making it 22 years old in 2025.
What condition is J 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 J Avenue over US 20 carry?
About 49 vehicles per day (2022 count), of which roughly 20% are trucks.
How long is J Avenue over US 20?
The structure is 224 ft (68.3 m) long with a longest span of 111 ft (33.8 m) and a deck 33 ft wide.
Who owns J Avenue over US 20?
It is owned by the State Highway Agency.