242 ST over Rock Ck
FairMiner County, South Dakota · 9W Canova · Structure no. 000000049081220
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected August 2024
- Type
- Channel Beam
- Concrete
- Length
- 36 ft
- 1 main span
- Daily traffic
- 24
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
242 ST over Rock Ck is a concrete channel beam carrying 242 ST over Rock Ck in Miner County, South Dakota. It was built in 1966, so it is 59 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 24 vehicles a day, roughly 3% of them trucks, projected to reach 24 by 2032. The structure is 36 ft (11 m) long and 32 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 242 ST over Rock Ck built?
It was built in 1966, making it 59 years old in 2025.
What condition is 242 ST over Rock 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 2024.
How much traffic does 242 ST over Rock Ck carry?
About 24 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is 242 ST over Rock Ck?
The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 32 ft wide.
Who owns 242 ST over Rock Ck?
It is owned by the County Highway Agency.