Old Highway 18 over Mickelson Trail
GoodFall River County, South Dakota · 4E & 1.8N Edgemont · Structure no. 000000024162102
- Built
- 2023
- 2 years old
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 178 ft
- 2 main spans
- Daily traffic
- 50
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Old Highway 18 over Mickelson Trail is a prestressed concrete stringer/multi-beam or girder carrying Old Highway 18 over Mickelson Trail in Fall River County, South Dakota. It was built in 2023, so it is 2 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 50 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2032. The structure is 178 ft (54.3 m) long and 31 ft wide. If it were closed, the detour would be 21.7 mi (35 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 |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old Highway 18 over Mickelson Trail built?
It was built in 2023, making it 2 years old in 2025.
What condition is Old Highway 18 over Mickelson Trail 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 May 2024.
How much traffic does Old Highway 18 over Mickelson Trail carry?
About 50 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is Old Highway 18 over Mickelson Trail?
The structure is 178 ft (54.3 m) long with a longest span of 93 ft (28.3 m) and a deck 31 ft wide.
Who owns Old Highway 18 over Mickelson Trail?
It is owned by the County Highway Agency.