SD240 over Big Buffalo Ck
FairJackson County, South Dakota · 1 S Cactus Flat · Structure no. 000000036119118
- Built
- 1952
- 73 years old
- Condition
- Fair
- inspected February 2023
- Type
- Slab
- Concrete Continuous
- Length
- 117 ft
- 5 main spans
- Daily traffic
- 1,145
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD240 over Big Buffalo Ck is a concrete continuous slab carrying SD240 over Big Buffalo Ck in Jackson County, South Dakota. It was built in 1952, so it is 73 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 1,145 vehicles a day, roughly 4% of them trucks, projected to reach 1,651 by 2044. The structure is 117 ft (35.7 m) long and 34 ft wide. If it were closed, the detour would be 42.3 mi (68 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD240 over Big Buffalo Ck built?
It was built in 1952, making it 73 years old in 2025.
What condition is SD240 over Big Buffalo 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 February 2023.
How much traffic does SD240 over Big Buffalo Ck carry?
About 1,145 vehicles per day (2024 count), of which roughly 4% are trucks.
How long is SD240 over Big Buffalo Ck?
The structure is 117 ft (35.7 m) long with a longest span of 23 ft (7.1 m) and a deck 34 ft wide.
Who owns SD240 over Big Buffalo Ck?
It is owned by the State Highway Agency.