170th St. over Brophy Creek
GoodClinton County, Iowa · 082E50901 · Structure no. 000000000123991
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected May 2024
- Type
- Slab
- Concrete Continuous
- Length
- 78 ft
- 3 main spans
- Daily traffic
- 70
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
170th St. over Brophy Creek is a concrete continuous slab carrying 170th St. over Brophy Creek in Clinton County, Iowa. It was built in 1971, so it is 54 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 70 vehicles a day, projected to reach 70 by 2044. The structure is 78 ft (23.8 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 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 170th St. over Brophy Creek built?
It was built in 1971, making it 54 years old in 2025.
What condition is 170th St. over Brophy 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 170th St. over Brophy Creek carry?
About 70 vehicles per day (2022 count).
How long is 170th St. over Brophy Creek?
The structure is 78 ft (23.8 m) long with a longest span of 29 ft (8.8 m) and a deck 32 ft wide.
Who owns 170th St. over Brophy Creek?
It is owned by the County Highway Agency.