475th Avenue over Medary Ck
PoorPosted for loadBrookings County, South Dakota · 1.8S & 1W Aurora · Structure no. 000000006210198
- Built
- 1930
- 95 years old
- Condition
- Poor
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 87 ft
- 3 main spans
- Daily traffic
- 92
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
475th Avenue over Medary Ck is a steel stringer/multi-beam or girder carrying 475th Avenue over Medary 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 87 ft (26.5 m) long and 20 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 | 7 Good | Some minor problems. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 475th Avenue over Medary Ck built?
It was built in 1930, making it 95 years old in 2025.
What condition is 475th Avenue over Medary 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 475th Avenue over Medary Ck carry?
About 92 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 475th Avenue over Medary Ck?
The structure is 87 ft (26.5 m) long with a longest span of 32 ft (9.8 m) and a deck 20 ft wide.
Who owns 475th Avenue over Medary Ck?
It is owned by the County Highway Agency.