SD042 over North Br Twelve Mile Ck
FairHanson County, South Dakota · 1.7 E Davison CO Line · Structure no. 000000031017210
- Built
- 1958
- 67 years old
- Condition
- Fair
- inspected June 2024
- Type
- Slab
- Concrete Continuous
- Length
- 106 ft
- 5 main spans
- Daily traffic
- 481
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD042 over North Br Twelve Mile Ck is a concrete continuous slab carrying SD042 over North Br Twelve Mile Ck in Hanson County, South Dakota. It was built in 1958, so it is 67 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 6 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 481 vehicles a day, roughly 15% of them trucks, projected to reach 658 by 2044. The structure is 106 ft (32.2 m) long and 34 ft wide. If it were closed, the detour would be 24.2 mi (39 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 SD042 over North Br Twelve Mile Ck built?
It was built in 1958, making it 67 years old in 2025.
What condition is SD042 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 June 2024.
How much traffic does SD042 over North Br Twelve Mile Ck carry?
About 481 vehicles per day (2024 count), of which roughly 15% are trucks.
How long is SD042 over North Br Twelve Mile Ck?
The structure is 106 ft (32.2 m) long with a longest span of 21 ft (6.3 m) and a deck 34 ft wide.
Who owns SD042 over North Br Twelve Mile Ck?
It is owned by the State Highway Agency.