420th Ave. over Creek
FairClinton County, Iowa · 082E63302 · Structure no. 000000000124421
- Built
- 1991
- 34 years old
- Condition
- Fair
- inspected February 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 42 ft
- 1 main span
- Daily traffic
- 91
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
420th Ave. over Creek is a prestressed concrete tee beam carrying 420th Ave. over Creek in Clinton County, Iowa. It was built in 1991, so it is 34 years old, younger than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 91 vehicles a day, projected to reach 91 by 2044. The structure is 42 ft (12.8 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 420th Ave. over Creek built?
It was built in 1991, making it 34 years old in 2025.
What condition is 420th Ave. over Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2024.
How much traffic does 420th Ave. over Creek carry?
About 91 vehicles per day (2022 count).
How long is 420th Ave. over Creek?
The structure is 42 ft (12.8 m) long with a longest span of 41 ft (12.5 m) and a deck 25 ft wide.
Who owns 420th Ave. over Creek?
It is owned by the County Highway Agency.