425 Ave over Rock Ck
PoorClosed to trafficMiner County, South Dakota · 10.0W & 0.9S Canova · Structure no. 000000049070229
- Built
- 1920
- 105 years old
- Condition
- Poor
- inspected July 2020
- Type
- Truss - Thru
- Steel
- Length
- 37 ft
- 1 main span
- Daily traffic
- 30
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
425 Ave over Rock Ck is a steel truss - thru carrying 425 Ave over Rock Ck in Miner County, South Dakota. It was built in 1920, so it is 105 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 0 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. Its operating status is: closed to all traffic.
It carries about 30 vehicles a day, roughly 2% of them trucks, projected to reach 30 by 2032. The structure is 37 ft (11.3 m) long and 19 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 0 Failed | Out of service and beyond corrective action. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 425 Ave over Rock Ck built?
It was built in 1920, making it 105 years old in 2025.
What condition is 425 Ave over Rock 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 2020.
How much traffic does 425 Ave over Rock Ck carry?
About 30 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 425 Ave over Rock Ck?
The structure is 37 ft (11.3 m) long with a longest span of 36 ft (11 m) and a deck 19 ft wide.
Who owns 425 Ave over Rock Ck?
It is owned by the County Highway Agency.