SD087 over French Ck
FairCuster County, South Dakota · 4.9 S JCT US 16A · Structure no. 000000017289107
- Built
- 1937
- 88 years old
- Condition
- Fair
- inspected August 2023
- Type
- Arch - Deck
- Concrete
- Length
- 70 ft
- 2 main spans
- Daily traffic
- 700
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD087 over French Ck is a concrete arch - deck carrying SD087 over French Ck in Custer County, South Dakota. It was built in 1937, so it is 88 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 700 vehicles a day, roughly 2% of them trucks, projected to reach 1,142 by 2044. The structure is 70 ft (21.3 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD087 over French Ck built?
It was built in 1937, making it 88 years old in 2025.
What condition is SD087 over French 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 2023.
How much traffic does SD087 over French Ck carry?
About 700 vehicles per day (2024 count), of which roughly 2% are trucks.
How long is SD087 over French Ck?
The structure is 70 ft (21.3 m) long with a longest span of 32 ft (9.8 m) and a deck 27 ft wide.
Who owns SD087 over French Ck?
It is owned by the State Highway Agency.