NW 18th ST over Rock Creek
GoodPolk County, Iowa · 080241600 · Structure no. 000000000282001
- Built
- 1982
- 43 years old
- Condition
- Good
- inspected May 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 26 ft
- 2 main spans
- Daily traffic
- 1,649
- 2021 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
NW 18th ST over Rock Creek is a concrete continuous culvert carrying NW 18th ST over Rock Creek in Polk County, Iowa. It was built in 1982, so it is 43 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 1,649 vehicles a day, projected to reach 1,649 by 2043. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 1.9 mi (3 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 18th ST over Rock Creek built?
It was built in 1982, making it 43 years old in 2025.
What condition is NW 18th ST over Rock 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 May 2023.
How much traffic does NW 18th ST over Rock Creek carry?
About 1,649 vehicles per day (2021 count).
How long is NW 18th ST over Rock Creek?
The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).
Who owns NW 18th ST over Rock Creek?
It is owned by the City or Municipal Highway Agency.