NW 18th Street over Rock Creek
GoodPolk County, Iowa · 080241001 · Structure no. 000000000504645
- Built
- 2003
- 22 years old
- Condition
- Good
- inspected May 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 27 ft
- 2 main spans
- Daily traffic
- 5,613
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
NW 18th Street over Rock Creek is a concrete continuous culvert carrying NW 18th Street over Rock Creek in Polk County, Iowa. It was built in 2003, so it is 22 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 5,613 vehicles a day, projected to reach 5,613 by 2044. The structure is 27 ft (8.2 m) long. 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NW 18th Street over Rock Creek built?
It was built in 2003, making it 22 years old in 2025.
What condition is NW 18th Street 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 2024.
How much traffic does NW 18th Street over Rock Creek carry?
About 5,613 vehicles per day (2022 count).
How long is NW 18th Street over Rock Creek?
The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).
Who owns NW 18th Street over Rock Creek?
It is owned by the City or Municipal Highway Agency.