SD251 over Ponca Ck
GoodGregory County, South Dakota · 2.6 S Jst US 18 · Structure no. 000000027050216
- Built
- 1984
- 41 years old
- Condition
- Good
- inspected October 2023
- Type
- Slab
- Concrete Continuous
- Length
- 60 ft
- 3 main spans
- Daily traffic
- 400
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD251 over Ponca Ck is a concrete continuous slab carrying SD251 over Ponca Ck in Gregory County, South Dakota. It was built in 1984, so it is 41 years old, younger than the South Dakota average of 48.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 400 vehicles a day, roughly 10% of them trucks, projected to reach 552 by 2044. The structure is 60 ft (18.4 m) long and 35 ft wide.
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD251 over Ponca Ck built?
It was built in 1984, making it 41 years old in 2025.
What condition is SD251 over Ponca Ck in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.
How much traffic does SD251 over Ponca Ck carry?
About 400 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is SD251 over Ponca Ck?
The structure is 60 ft (18.4 m) long with a longest span of 20 ft (6.2 m) and a deck 35 ft wide.
Who owns SD251 over Ponca Ck?
It is owned by the State Highway Agency.