355 Avenue over Ponca Ck
FairGregory County, South Dakota · 6W & 4.1S Bonesteel · Structure no. 000000027230331
- Built
- 1991
- 34 years old
- Condition
- Fair
- inspected July 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 40 ft
- 1 main span
- Daily traffic
- 36
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
355 Avenue over Ponca Ck is a prestressed concrete tee beam carrying 355 Avenue over Ponca Ck in Gregory County, South Dakota. It was built in 1991, so it is 34 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 fair condition with a lowest component rating of 5 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 36 vehicles a day, roughly 2% of them trucks, projected to reach 36 by 2032. The structure is 40 ft (12.2 m) long and 23 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 355 Avenue over Ponca Ck built?
It was built in 1991, making it 34 years old in 2025.
What condition is 355 Avenue 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 July 2024.
How much traffic does 355 Avenue over Ponca Ck carry?
About 36 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 355 Avenue over Ponca Ck?
The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 23 ft wide.
Who owns 355 Avenue over Ponca Ck?
It is owned by the County Highway Agency.