485 Avenue over North Fork Yellow Bank R
PoorPosted for loadGrant County, South Dakota · 7E & 4.6S Milbank · Structure no. 000000026360116
- Built
- 1930
- 95 years old
- Condition
- Poor
- inspected September 2024
- Type
- Slab
- Concrete
- Length
- 51 ft
- 1 main span
- Daily traffic
- 35
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
485 Avenue over North Fork Yellow Bank R is a concrete slab carrying 485 Avenue over North Fork Yellow Bank R in Grant County, South Dakota. It was built in 1930, so it is 95 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 35 vehicles a day, roughly 2% of them trucks, projected to reach 35 by 2032. The structure is 51 ft (15.5 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 485 Avenue over North Fork Yellow Bank R built?
It was built in 1930, making it 95 years old in 2025.
What condition is 485 Avenue over North Fork Yellow Bank R in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.
How much traffic does 485 Avenue over North Fork Yellow Bank R carry?
About 35 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 485 Avenue over North Fork Yellow Bank R?
The structure is 51 ft (15.5 m) long with a longest span of 48 ft (14.6 m) and a deck 22 ft wide.
Who owns 485 Avenue over North Fork Yellow Bank R?
It is owned by the County Highway Agency.