120th Avenue over Dd #23
GoodClinton County, Iowa · 083E13204 · Structure no. 000000000124572
- Built
- 2002
- 23 years old
- Condition
- Good
- inspected January 2025
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 47 ft
- 1 main span
- Daily traffic
- 51
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
120th Avenue over Dd #23 is a prestressed concrete tee beam carrying 120th Avenue over Dd #23 in Clinton County, Iowa. It was built in 2002, so it is 23 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 51 vehicles a day, projected to reach 51 by 2045. The structure is 47 ft (14.3 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 120th Avenue over Dd #23 built?
It was built in 2002, making it 23 years old in 2025.
What condition is 120th Avenue over Dd #23 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 January 2025.
How much traffic does 120th Avenue over Dd #23 carry?
About 51 vehicles per day (2022 count).
How long is 120th Avenue over Dd #23?
The structure is 47 ft (14.3 m) long with a longest span of 46 ft (14 m) and a deck 28 ft wide.
Who owns 120th Avenue over Dd #23?
It is owned by the County Highway Agency.