NE 56th ST over East Four Mile Creek
GoodPolk County, Iowa · 079233510 · Structure no. 000000000283335
- Built
- 1987
- 38 years old
- Condition
- Good
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 98 ft
- 1 main span
- Daily traffic
- 8,525
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
NE 56th ST over East Four Mile Creek is a prestressed concrete stringer/multi-beam or girder carrying NE 56th ST over East Four Mile Creek in Polk County, Iowa. It was built in 1987, so it is 38 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 8,525 vehicles a day, roughly 5% of them trucks, projected to reach 8,525 by 2043. The structure is 98 ft (29.9 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 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. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NE 56th ST over East Four Mile Creek built?
It was built in 1987, making it 38 years old in 2025.
What condition is NE 56th ST over East Four Mile Creek 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 NE 56th ST over East Four Mile Creek carry?
About 8,525 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is NE 56th ST over East Four Mile Creek?
The structure is 98 ft (29.9 m) long with a longest span of 95 ft (29 m) and a deck 43 ft wide.
Who owns NE 56th ST over East Four Mile Creek?
It is owned by the County Highway Agency.