477th Avenue over Deer Ck
PoorPosted for loadBrookings County, South Dakota · 1W & 1.1N Bushnell · Structure no. 000000006230139
- Built
- 1930
- 95 years old
- Condition
- Poor
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 31 ft
- 1 main span
- Daily traffic
- 92
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
477th Avenue over Deer Ck is a steel stringer/multi-beam or girder carrying 477th Avenue over Deer Ck in Brookings 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 92 vehicles a day, roughly 2% of them trucks, projected to reach 92 by 2032. The structure is 31 ft (9.4 m) long and 16 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 477th Avenue over Deer Ck built?
It was built in 1930, making it 95 years old in 2025.
What condition is 477th Avenue over Deer Ck 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 2023.
How much traffic does 477th Avenue over Deer Ck carry?
About 92 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 477th Avenue over Deer Ck?
The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.9 m) and a deck 16 ft wide.
Who owns 477th Avenue over Deer Ck?
It is owned by the County Highway Agency.