Hudson Flat Road over Plum Ck
FairHaakon County, South Dakota · 9.6N&10.2E Milesvill · Structure no. 000000028268104
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 111 ft
- 3 main spans
- Daily traffic
- 28
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Hudson Flat Road over Plum Ck is a prestressed concrete tee beam carrying Hudson Flat Road over Plum Ck in Haakon County, South Dakota. It was built in 1973, so it is 52 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 28 vehicles a day, roughly 2% of them trucks, projected to reach 28 by 2032. The structure is 111 ft (33.8 m) long and 31 ft wide. If it were closed, the detour would be 34.2 mi (55 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Hudson Flat Road over Plum Ck built?
It was built in 1973, making it 52 years old in 2025.
What condition is Hudson Flat Road over Plum 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 September 2024.
How much traffic does Hudson Flat Road over Plum Ck carry?
About 28 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is Hudson Flat Road over Plum Ck?
The structure is 111 ft (33.8 m) long with a longest span of 50 ft (15.2 m) and a deck 31 ft wide.
Who owns Hudson Flat Road over Plum Ck?
It is owned by the County Highway Agency.