NW 30th ST over Four Mile Creek Tributar
GoodPolk County, Iowa · 081240402 · Structure no. 000000000282911
- Built
- 1999
- 26 years old
- Condition
- Good
- inspected May 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 32 ft
- 2 main spans
- Daily traffic
- 61
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
NW 30th ST over Four Mile Creek Tributar is a concrete continuous culvert carrying NW 30th ST over Four Mile Creek Tributar in Polk County, Iowa. It was built in 1999, so it is 26 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 61 vehicles a day, projected to reach 61 by 2042. The structure is 32 ft (9.8 m) long.
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 30th ST over Four Mile Creek Tributar built?
It was built in 1999, making it 26 years old in 2025.
What condition is NW 30th ST over Four Mile Creek Tributar 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 May 2023.
How much traffic does NW 30th ST over Four Mile Creek Tributar carry?
About 61 vehicles per day (2022 count).
How long is NW 30th ST over Four Mile Creek Tributar?
The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).
Who owns NW 30th ST over Four Mile Creek Tributar?
It is owned by the County Highway Agency.