56th ST over I-235
GoodPolk County, Iowa · 0.5 Mi. E of Jct. Ia 28 · Structure no. 000000000042321
- Built
- 2005
- 20 years old
- Condition
- Good
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 271 ft
- 2 main spans
- Daily traffic
- 5,745
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
56th ST over I-235 is a steel continuous stringer/multi-beam or girder carrying 56th ST 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 5,745 vehicles a day, roughly 1% of them trucks, projected to reach 5,745 by 2044. The structure is 271 ft (82.6 m) long and 67 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 56th ST over I-235 built?
It was built in 2005, making it 20 years old in 2025.
What condition is 56th ST 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 October 2024.
How much traffic does 56th ST over I-235 carry?
About 5,745 vehicles per day (2022 count), of which roughly 1% are trucks.
How long is 56th ST over I-235?
The structure is 271 ft (82.6 m) long with a longest span of 142 ft (43.3 m) and a deck 67 ft wide.
Who owns 56th ST over I-235?
It is owned by the State Highway Agency.