31st Street over I-235
GoodPolk County, Iowa · 2.3 Mi. E of Jct. Ia #28 · Structure no. 000000000042401
- Built
- 2005
- 20 years old
- Condition
- Good
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 205 ft
- 2 main spans
- Daily traffic
- 13,200
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
31st Street over I-235 is a prestressed concrete stringer/multi-beam or girder carrying 31st Street over I-235 in Polk County, Iowa. It was built in 2005, so it is 20 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 13,200 vehicles a day, roughly 1% of them trucks, projected to reach 13,200 by 2043. The structure is 205 ft (62.5 m) long and 74 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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 31st Street over I-235 built?
It was built in 2005, making it 20 years old in 2025.
What condition is 31st Street over I-235 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 September 2023.
How much traffic does 31st Street over I-235 carry?
About 13,200 vehicles per day (2022 count), of which roughly 1% are trucks.
How long is 31st Street over I-235?
The structure is 205 ft (62.5 m) long with a longest span of 100 ft (30.5 m) and a deck 74 ft wide.
Who owns 31st Street over I-235?
It is owned by the State Highway Agency.