408th Avenue over North Br Twelve Mile Ck
FairDavison County, South Dakota · 1 W & 8.8 S Mitchell · Structure no. 000000018140188
- Built
- 1920
- 105 years old, rebuilt 1983
- Condition
- Fair
- inspected August 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 31 ft
- 1 main span
- Daily traffic
- 433
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
408th Avenue over North Br Twelve Mile Ck is a prestressed concrete tee beam carrying 408th Avenue over North Br Twelve Mile Ck in Davison County, South Dakota. It was built in 1920 and reconstructed in 1983, 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 fair condition with a lowest component rating of 5 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 433 vehicles a day, roughly 2% of them trucks, projected to reach 433 by 2032. The structure is 31 ft (9.3 m) long and 30 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 408th Avenue over North Br Twelve Mile Ck built?
It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1983.
What condition is 408th Avenue over North Br Twelve Mile Ck 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 August 2024.
How much traffic does 408th Avenue over North Br Twelve Mile Ck carry?
About 433 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 408th Avenue over North Br Twelve Mile Ck?
The structure is 31 ft (9.3 m) long with a longest span of 30 ft (9.1 m) and a deck 30 ft wide.
Who owns 408th Avenue over North Br Twelve Mile Ck?
It is owned by the County Highway Agency.