478th Avenue over Deer Ck
PoorPosted for loadBrookings County, South Dakota · 2.7N Bushnell · Structure no. 000000006240123
- Built
- 1950
- 75 years old
- Condition
- Poor
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 30 ft
- 1 main span
- Daily traffic
- 712
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
478th Avenue over Deer Ck is a steel stringer/multi-beam or girder carrying 478th Avenue over Deer Ck in Brookings County, South Dakota. It was built in 1950, so it is 75 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 3 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 712 vehicles a day, roughly 3% of them trucks, projected to reach 712 by 2034. The structure is 30 ft (9.1 m) long and 24 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 478th Avenue over Deer Ck built?
It was built in 1950, making it 75 years old in 2025.
What condition is 478th 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 478th Avenue over Deer Ck carry?
About 712 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is 478th Avenue over Deer Ck?
The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 24 ft wide.
Who owns 478th Avenue over Deer Ck?
It is owned by the County Highway Agency.