Sd Route 87 over Beaver Creek
FairCuster County, South Dakota · On Sd Route 87 MP 41.4; · Structure no. 1560001P0000000
- Built
- 1929
- 96 years old
- Condition
- Fair
- inspected January 2024
- Type
- Arch - Deck
- Concrete
- Length
- 220 ft
- 1 main span
- Daily traffic
- 326
- 2022 count
- Owner
- Federal
- National Park Service
About this bridge
Sd Route 87 over Beaver Creek is a concrete arch - deck carrying Sd Route 87 over Beaver Creek in Custer County, South Dakota. It was built in 1929, so it is 96 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 326 vehicles a day, roughly 2% of them trucks, projected to reach 391 by 2042. The structure is 220 ft (67.1 m) long and 23 ft wide. If it were closed, the detour would be 41 mi (66 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 Sd Route 87 over Beaver Creek built?
It was built in 1929, making it 96 years old in 2025.
What condition is Sd Route 87 over Beaver Creek 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 January 2024.
How much traffic does Sd Route 87 over Beaver Creek carry?
About 326 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is Sd Route 87 over Beaver Creek?
The structure is 220 ft (67.1 m) long with a longest span of 120 ft (36.6 m) and a deck 23 ft wide.
Who owns Sd Route 87 over Beaver Creek?
It is owned by the National Park Service.