SD377 over Johnson Ck
FairJackson County, South Dakota · 1.3 SW JCT Sd 240 · Structure no. 000000036086179
- Built
- 1959
- 66 years old
- Condition
- Fair
- inspected November 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 53 ft
- 3 main spans
- Daily traffic
- 514
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD377 over Johnson Ck is a concrete continuous culvert carrying SD377 over Johnson Ck in Jackson County, South Dakota. It was built in 1959, so it is 66 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 6 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 514 vehicles a day, roughly 6% of them trucks, projected to reach 741 by 2044. The structure is 53 ft (16.1 m) long. If it were closed, the detour would be 80.8 mi (130 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD377 over Johnson Ck built?
It was built in 1959, making it 66 years old in 2025.
What condition is SD377 over Johnson 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 November 2024.
How much traffic does SD377 over Johnson Ck carry?
About 514 vehicles per day (2024 count), of which roughly 6% are trucks.
How long is SD377 over Johnson Ck?
The structure is 53 ft (16.1 m) long with a longest span of 17 ft (5.2 m).
Who owns SD377 over Johnson Ck?
It is owned by the State Highway Agency.