US018 over South Fork Blacktail Ck
FairFall River County, South Dakota · 6 E JCT US 385 S · Structure no. 000000024475200
- Built
- 1952
- 73 years old
- Condition
- Fair
- inspected February 2025
- Type
- Slab
- Concrete Continuous
- Length
- 93 ft
- 3 main spans
- Daily traffic
- 598
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US018 over South Fork Blacktail Ck is a concrete continuous slab carrying US018 over South Fork Blacktail Ck in Fall River 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 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 598 vehicles a day, roughly 24% of them trucks, projected to reach 889 by 2044. The structure is 93 ft (28.3 m) long and 34 ft wide. If it were closed, the detour would be 44.1 mi (71 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 US018 over South Fork Blacktail Ck built?
It was built in 1952, making it 73 years old in 2025.
What condition is US018 over South Fork Blacktail 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 2025.
How much traffic does US018 over South Fork Blacktail Ck carry?
About 598 vehicles per day (2024 count), of which roughly 24% are trucks.
How long is US018 over South Fork Blacktail Ck?
The structure is 93 ft (28.3 m) long with a longest span of 33 ft (10.1 m) and a deck 34 ft wide.
Who owns US018 over South Fork Blacktail Ck?
It is owned by the State Highway Agency.