Ia 1 NB over I-80
GoodJohnson County, Iowa · At Jct. I-80 · Structure no. 000000000031770
- Built
- 1962
- 63 years old, rebuilt 2009
- Condition
- Good
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 240 ft
- 4 main spans
- Daily traffic
- 9,350
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 1 NB over I-80 is a steel continuous stringer/multi-beam or girder carrying Ia 1 NB over I-80 in Johnson County, Iowa. It was built in 1962 and reconstructed in 2009, so it is 63 years old, older 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 9,350 vehicles a day, roughly 2% of them trucks, projected to reach 9,350 by 2044. The structure is 240 ft (73 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 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 Ia 1 NB over I-80 built?
It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2009.
What condition is Ia 1 NB over I-80 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 October 2024.
How much traffic does Ia 1 NB over I-80 carry?
About 9,350 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is Ia 1 NB over I-80?
The structure is 240 ft (73 m) long with a longest span of 66 ft (20.1 m) and a deck 35 ft wide.
Who owns Ia 1 NB over I-80?
It is owned by the State Highway Agency.