SD047 over Ponca Ck
FairGregory County, South Dakota · 5.3 S JCT US 18 Burke · Structure no. 000000027120276
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 185 ft
- 3 main spans
- Daily traffic
- 326
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD047 over Ponca Ck is a steel continuous stringer/multi-beam or girder carrying SD047 over Ponca Ck in Gregory County, South Dakota. It was built in 1961, so it is 64 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 326 vehicles a day, roughly 28% of them trucks, projected to reach 450 by 2044. The structure is 185 ft (56.3 m) long and 32 ft wide. If it were closed, the detour would be 23 mi (37 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD047 over Ponca Ck built?
It was built in 1961, making it 64 years old in 2025.
What condition is SD047 over Ponca 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 March 2023.
How much traffic does SD047 over Ponca Ck carry?
About 326 vehicles per day (2024 count), of which roughly 28% are trucks.
How long is SD047 over Ponca Ck?
The structure is 185 ft (56.3 m) long with a longest span of 70 ft (21.3 m) and a deck 32 ft wide.
Who owns SD047 over Ponca Ck?
It is owned by the State Highway Agency.