120th ST over Simmons Creek
GoodClinton County, Iowa · 083E51401 · Structure no. 000000000125451
- Built
- 2005
- 20 years old
- Condition
- Good
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 37 ft
- 1 main span
- Daily traffic
- 21
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
120th ST over Simmons Creek is a steel stringer/multi-beam or girder carrying 120th ST over Simmons Creek in Clinton County, Iowa. It was built in 2005, so it is 20 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 21 vehicles a day, projected to reach 21 by 2044. The structure is 37 ft (11.3 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 | 9 Excellent | No problems noted. |
| Superstructure | 9 Excellent | No problems noted. |
| Substructure | 9 Excellent | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 120th ST over Simmons Creek built?
It was built in 2005, making it 20 years old in 2025.
What condition is 120th ST over Simmons 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 March 2024.
How much traffic does 120th ST over Simmons Creek carry?
About 21 vehicles per day (2022 count).
How long is 120th ST over Simmons Creek?
The structure is 37 ft (11.3 m) long with a longest span of 34 ft (10.4 m) and a deck 32 ft wide.
Who owns 120th ST over Simmons Creek?
It is owned by the County Highway Agency.