48040 312th ST over East Union Ck
PoorUnion County, South Dakota · 10.5S & 1.4E Alcester · Structure no. 000000064104150
- Built
- 1950
- 75 years old
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 31 ft
- 1 main span
- Daily traffic
- 25
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
48040 312th ST over East Union Ck is a steel stringer/multi-beam or girder carrying 48040 312th ST over East Union Ck in Union 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.
It carries about 25 vehicles a day, roughly 2% of them trucks, projected to reach 25 by 2032. The structure is 31 ft (9.3 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| 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 48040 312th ST over East Union Ck built?
It was built in 1950, making it 75 years old in 2025.
What condition is 48040 312th ST over East Union 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 48040 312th ST over East Union Ck carry?
About 25 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 48040 312th ST over East Union Ck?
The structure is 31 ft (9.3 m) long with a longest span of 29 ft (8.7 m) and a deck 28 ft wide.
Who owns 48040 312th ST over East Union Ck?
It is owned by the County Highway Agency.