239th St. over Rock Ck
PoorPosted for loadMiner County, South Dakota · 6S & 6.5W Howard · Structure no. 000000049095190
- Built
- 1910
- 115 years old
- Condition
- Poor
- inspected August 2024
- Type
- Slab
- Concrete Continuous
- Length
- 27 ft
- 1 main span
- Daily traffic
- 5
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
239th St. over Rock Ck is a concrete continuous slab carrying 239th St. over Rock Ck in Miner County, South Dakota. It was built in 1910, so it is 115 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 3 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: posted for load restriction.
It carries about 5 vehicles a day, roughly 2% of them trucks, projected to reach 5 by 2032. The structure is 27 ft (8.2 m) long and 18 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| 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 239th St. over Rock Ck built?
It was built in 1910, making it 115 years old in 2025.
What condition is 239th St. 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 August 2024.
How much traffic does 239th St. over Rock Ck carry?
About 5 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 239th St. over Rock Ck?
The structure is 27 ft (8.2 m) long with a longest span of 24 ft (7.3 m) and a deck 18 ft wide.
Who owns 239th St. over Rock Ck?
It is owned by the County Highway Agency.