31490 475th ST over Brule Ck
PoorUnion County, South Dakota · 2.5N & 4E Junction City · Structure no. 000000064049179
- Built
- 1977
- 48 years old
- Condition
- Poor
- inspected August 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 120 ft
- 3 main spans
- Daily traffic
- 60
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
31490 475th ST over Brule Ck is a prestressed concrete tee beam carrying 31490 475th ST over Brule Ck in Union County, South Dakota. It was built in 1977, so it is 48 years old, younger 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.
It carries about 60 vehicles a day, roughly 3% of them trucks, projected to reach 60 by 2032. The structure is 120 ft (36.7 m) long and 31 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 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 31490 475th ST over Brule Ck built?
It was built in 1977, making it 48 years old in 2025.
What condition is 31490 475th ST over Brule 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 August 2024.
How much traffic does 31490 475th ST over Brule Ck carry?
About 60 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is 31490 475th ST over Brule Ck?
The structure is 120 ft (36.7 m) long with a longest span of 50 ft (15.2 m) and a deck 31 ft wide.
Who owns 31490 475th ST over Brule Ck?
It is owned by the County Highway Agency.