WB I-80 over SR (N-28)
GoodCass County, Iowa · At the Jct. SR N28 · Structure no. 000000000018120
- Built
- 1959
- 66 years old, rebuilt 2011
- Condition
- Good
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 154 ft
- 3 main spans
- Daily traffic
- 11,450
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
WB I-80 over SR (N-28) is a prestressed concrete stringer/multi-beam or girder carrying WB I-80 over SR (N-28) in Cass County, Iowa. It was built in 1959 and reconstructed in 2011, so it is 66 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 11,450 vehicles a day, roughly 42% of them trucks, projected to reach 11,450 by 2042. The structure is 154 ft (46.9 m) long and 46 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 | 8 Very Good | No problems noted. |
| 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 WB I-80 over SR (N-28) built?
It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2011.
What condition is WB I-80 over SR (N-28) 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 March 2023.
How much traffic does WB I-80 over SR (N-28) carry?
About 11,450 vehicles per day (2022 count), of which roughly 42% are trucks.
How long is WB I-80 over SR (N-28)?
The structure is 154 ft (46.9 m) long with a longest span of 56 ft (17.1 m) and a deck 46 ft wide.
Who owns WB I-80 over SR (N-28)?
It is owned by the State Highway Agency.