475 Avenue over North Fork Yellow Bank R
FairGrant County, South Dakota · 4S & 3W Milbank · Structure no. 000000026260112
- Built
- 1938
- 87 years old
- Condition
- Fair
- inspected September 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 21 ft
- 2 main spans
- Daily traffic
- 100
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
475 Avenue over North Fork Yellow Bank R is a concrete continuous culvert carrying 475 Avenue over North Fork Yellow Bank R in Grant County, South Dakota. It was built in 1938, so it is 87 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 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 100 vehicles a day, roughly 2% of them trucks, projected to reach 100 by 2032. The structure is 21 ft (6.3 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 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 475 Avenue over North Fork Yellow Bank R built?
It was built in 1938, making it 87 years old in 2025.
What condition is 475 Avenue over North Fork Yellow Bank R 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 September 2024.
How much traffic does 475 Avenue over North Fork Yellow Bank R carry?
About 100 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 475 Avenue over North Fork Yellow Bank R?
The structure is 21 ft (6.3 m) long with a longest span of 11 ft (3.3 m) and a deck 26 ft wide.
Who owns 475 Avenue over North Fork Yellow Bank R?
It is owned by the County Highway Agency.