259th 85th ST N over Silver Ck
PoorMinnehaha County, South Dakota · 1S Renner · Structure no. 000000050205150
- Built
- 1970
- 55 years old
- Condition
- Poor
- inspected July 2023
- Type
- Channel Beam
- Concrete
- Length
- 73 ft
- 2 main spans
- Daily traffic
- 32
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
259th 85th ST N over Silver Ck is a concrete channel beam carrying 259th 85th ST N over Silver Ck in Minnehaha County, South Dakota. It was built in 1970, so it is 55 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 32 vehicles a day, roughly 2% of them trucks, projected to reach 40 by 2035. The structure is 73 ft (22.1 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 259th 85th ST N over Silver Ck built?
It was built in 1970, making it 55 years old in 2025.
What condition is 259th 85th ST N over Silver Ck in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.
How much traffic does 259th 85th ST N over Silver Ck carry?
About 32 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 259th 85th ST N over Silver Ck?
The structure is 73 ft (22.1 m) long with a longest span of 36 ft (11.1 m) and a deck 25 ft wide.
Who owns 259th 85th ST N over Silver Ck?
It is owned by the County Highway Agency.