NW 158th Ave over Four Mile Creek
GoodPolk County, Iowa · 081240901 · Structure no. 000000000282915
- Built
- 1975
- 50 years old
- Condition
- Good
- inspected September 2023
- Type
- Culvert
- Concrete
- Length
- 22 ft
- 2 main spans
- Daily traffic
- 259
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
NW 158th Ave over Four Mile Creek is a concrete culvert carrying NW 158th Ave over Four Mile Creek in Polk County, Iowa. It was built in 1975, so it is 50 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 259 vehicles a day, roughly 12% of them trucks, projected to reach 259 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.1 mi (5 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NW 158th Ave over Four Mile Creek built?
It was built in 1975, making it 50 years old in 2025.
What condition is NW 158th Ave over 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 September 2023.
How much traffic does NW 158th Ave over Four Mile Creek carry?
About 259 vehicles per day (2022 count), of which roughly 12% are trucks.
How long is NW 158th Ave over Four Mile Creek?
The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).
Who owns NW 158th Ave over Four Mile Creek?
It is owned by the County Highway Agency.