490th Steet over I-80
FairPottawattamie County, Iowa · 1.5 Mi. W SR M47 · Structure no. 000000000045620
- Built
- 1964
- 61 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 218 ft
- 4 main spans
- Daily traffic
- 50
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
490th Steet over I-80 is a prestressed concrete stringer/multi-beam or girder carrying 490th Steet over I-80 in Pottawattamie County, Iowa. It was built in 1964, so it is 61 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 50 vehicles a day, roughly 30% of them trucks, projected to reach 50 by 2043. The structure is 218 ft (66.4 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 490th Steet over I-80 built?
It was built in 1964, making it 61 years old in 2025.
What condition is 490th Steet over I-80 in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.
How much traffic does 490th Steet over I-80 carry?
About 50 vehicles per day (2022 count), of which roughly 30% are trucks.
How long is 490th Steet over I-80?
The structure is 218 ft (66.4 m) long with a longest span of 69 ft (21 m) and a deck 32 ft wide.
Who owns 490th Steet over I-80?
It is owned by the State Highway Agency.