236th Ave over Silver Creek
PoorWinneshiek County, Iowa · 100092416 · Structure no. 000000000052570
- Built
- 1928
- 97 years old
- Condition
- Poor
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 33 ft
- 1 main span
- Daily traffic
- 187
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
236th Ave over Silver Creek is a steel stringer/multi-beam or girder carrying 236th Ave over Silver Creek in Winneshiek County, Iowa. It was built in 1928, so it is 97 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.
It carries about 187 vehicles a day, roughly 13% of them trucks, projected to reach 187 by 2044. The structure is 33 ft (10.1 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 236th Ave over Silver Creek built?
It was built in 1928, making it 97 years old in 2025.
What condition is 236th Ave over Silver 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 March 2024.
How much traffic does 236th Ave over Silver Creek carry?
About 187 vehicles per day (2022 count), of which roughly 13% are trucks.
How long is 236th Ave over Silver Creek?
The structure is 33 ft (10.1 m) long with a longest span of 33 ft (10.1 m) and a deck 28 ft wide.
Who owns 236th Ave over Silver Creek?
It is owned by the County Highway Agency.