397th Ave. over Sand Ck
PoorPosted for loadSanborn County, South Dakota · 7.5N Woonsocket · Structure no. 000000056030025
- Built
- 1920
- 105 years old
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 60 ft
- 2 main spans
- Daily traffic
- 35
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
397th Ave. over Sand Ck is a steel stringer/multi-beam or girder carrying 397th Ave. over Sand Ck in Sanborn County, South Dakota. It was built in 1920, so it is 105 years old, older than the South Dakota average of 48.9 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 35 vehicles a day, roughly 2% of them trucks, projected to reach 35 by 2032. The structure is 60 ft (18.3 m) long and 21 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, 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 397th Ave. over Sand Ck built?
It was built in 1920, making it 105 years old in 2025.
What condition is 397th Ave. over Sand Ck 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 August 2024.
How much traffic does 397th Ave. over Sand Ck carry?
About 35 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 397th Ave. over Sand Ck?
The structure is 60 ft (18.3 m) long with a longest span of 29 ft (8.8 m) and a deck 21 ft wide.
Who owns 397th Ave. over Sand Ck?
It is owned by the County Highway Agency.