SD020 over Thunder Butte Ck
GoodPerkins County, South Dakota · 4.1E Prairie City · Structure no. 000000053112290
- Built
- 2008
- 17 years old
- Condition
- Good
- inspected October 2022
- Type
- Culvert
- Concrete Continuous
- Length
- 29 ft
- 2 main spans
- Daily traffic
- 380
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD020 over Thunder Butte Ck is a concrete continuous culvert carrying SD020 over Thunder Butte Ck in Perkins County, South Dakota. It was built in 2008, so it is 17 years old, younger than the South Dakota average of 48.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 380 vehicles a day, roughly 17% of them trucks, projected to reach 568 by 2044. The structure is 29 ft (8.7 m) long. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 9 Excellent | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD020 over Thunder Butte Ck built?
It was built in 2008, making it 17 years old in 2025.
What condition is SD020 over Thunder Butte Ck in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2022.
How much traffic does SD020 over Thunder Butte Ck carry?
About 380 vehicles per day (2024 count), of which roughly 17% are trucks.
How long is SD020 over Thunder Butte Ck?
The structure is 29 ft (8.7 m) long with a longest span of 14 ft (4.2 m).
Who owns SD020 over Thunder Butte Ck?
It is owned by the State Highway Agency.