420th over Burr Oak Creek
PoorPosted for loadMitchell County, Iowa · 099172501 · Structure no. 000000000248640
- Built
- 1966
- 59 years old
- Condition
- Poor
- inspected December 2023
- Type
- Channel Beam
- Concrete
- Length
- 30 ft
- 1 main span
- Daily traffic
- 15
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
420th over Burr Oak Creek is a concrete channel beam carrying 420th over Burr Oak Creek in Mitchell County, Iowa. It was built in 1966, so it is 59 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 15 vehicles a day, projected to reach 15 by 2043. The structure is 30 ft (9.1 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 420th over Burr Oak Creek built?
It was built in 1966, making it 59 years old in 2025.
What condition is 420th over Burr Oak Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.
How much traffic does 420th over Burr Oak Creek carry?
About 15 vehicles per day (2022 count).
How long is 420th over Burr Oak Creek?
The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.
Who owns 420th over Burr Oak Creek?
It is owned by the County Highway Agency.