Twnshp RD 187th ST over Cobb Ck
PoorPosted for loadDeuel County, South Dakota · 2.3 E & 1 N Brandt · Structure no. 000000020153210
- Built
- 1908
- 117 years old
- Condition
- Poor
- inspected August 2024
- Type
- Truss - Thru
- Steel
- Length
- 71 ft
- 1 main span
- Daily traffic
- 25
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Twnshp RD 187th ST over Cobb Ck is a steel truss - thru carrying Twnshp RD 187th ST over Cobb Ck in Deuel County, South Dakota. It was built in 1908, so it is 117 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. Its operating status is: posted for load restriction.
It carries about 25 vehicles a day, roughly 2% of them trucks, projected to reach 25 by 2032. The structure is 71 ft (21.7 m) long and 24 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Twnshp RD 187th ST over Cobb Ck built?
It was built in 1908, making it 117 years old in 2025.
What condition is Twnshp RD 187th ST over Cobb 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 Twnshp RD 187th ST over Cobb Ck carry?
About 25 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is Twnshp RD 187th ST over Cobb Ck?
The structure is 71 ft (21.7 m) long with a longest span of 70 ft (21.3 m) and a deck 24 ft wide.
Who owns Twnshp RD 187th ST over Cobb Ck?
It is owned by the County Highway Agency.