24480 421 Avenue over Rock Ck
FairHanson County, South Dakota · 2 E 7.2 N Fulton · Structure no. 000000031090008
- Built
- 1976
- 49 years old
- Condition
- Fair
- inspected July 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 100 ft
- 2 main spans
- Daily traffic
- 207
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
24480 421 Avenue over Rock Ck is a prestressed concrete tee beam carrying 24480 421 Avenue over Rock Ck in Hanson County, South Dakota. It was built in 1976, so it is 49 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 207 vehicles a day, roughly 3% of them trucks, projected to reach 207 by 2032. The structure is 100 ft (30.5 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 24480 421 Avenue over Rock Ck built?
It was built in 1976, making it 49 years old in 2025.
What condition is 24480 421 Avenue over Rock 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 2023.
How much traffic does 24480 421 Avenue over Rock Ck carry?
About 207 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is 24480 421 Avenue over Rock Ck?
The structure is 100 ft (30.5 m) long with a longest span of 50 ft (15.1 m) and a deck 31 ft wide.
Who owns 24480 421 Avenue over Rock Ck?
It is owned by the County Highway Agency.