401st Avenue over North Br Twelve Mile Ck
PoorPosted for loadDavison County, South Dakota · 10 W & 1.2 N Ethan · Structure no. 000000018070198
- Built
- 1925
- 100 years old, rebuilt 1965
- Condition
- Poor
- inspected July 2024
- Type
- Culvert
- Concrete
- Length
- 32 ft
- 3 main spans
- Daily traffic
- 53
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
401st Avenue over North Br Twelve Mile Ck is a concrete culvert carrying 401st Avenue over North Br Twelve Mile Ck in Davison County, South Dakota. It was built in 1925 and reconstructed in 1965, so it is 100 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 53 vehicles a day, roughly 2% of them trucks, projected to reach 53 by 2032. The structure is 32 ft (9.8 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 401st Avenue over North Br Twelve Mile Ck built?
It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1965.
What condition is 401st Avenue over North Br Twelve Mile 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 July 2024.
How much traffic does 401st Avenue over North Br Twelve Mile Ck carry?
About 53 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 401st Avenue over North Br Twelve Mile Ck?
The structure is 32 ft (9.8 m) long with a longest span of 14 ft (4.3 m) and a deck 31 ft wide.
Who owns 401st Avenue over North Br Twelve Mile Ck?
It is owned by the County Highway Agency.