185 Street over Medicine Knoll Ck
FairSully County, South Dakota · 14.2E Onida · Structure no. 000000060462130
- Built
- 1930
- 95 years old, rebuilt 1958
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 30 ft
- 1 main span
- Daily traffic
- 150
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
185 Street over Medicine Knoll Ck is a steel stringer/multi-beam or girder carrying 185 Street over Medicine Knoll Ck in Sully County, South Dakota. It was built in 1930 and reconstructed in 1958, so it is 95 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 150 vehicles a day, roughly 3% of them trucks, projected to reach 150 by 2032. The structure is 30 ft (9.1 m) long and 25 ft wide. If it were closed, the detour would be 16.2 mi (26 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 185 Street over Medicine Knoll Ck built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1958.
What condition is 185 Street over Medicine Knoll 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 185 Street over Medicine Knoll Ck carry?
About 150 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is 185 Street over Medicine Knoll Ck?
The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 25 ft wide.
Who owns 185 Street over Medicine Knoll Ck?
It is owned by the County Highway Agency.