48020 309 Str. over East Union Ck
PoorUnion County, South Dakota · 7.5S & 1.2E Alcester · Structure no. 000000064102120
- Built
- 1950
- 75 years old, rebuilt 1983
- Condition
- Poor
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 40 ft
- 1 main span
- Daily traffic
- 45
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
48020 309 Str. over East Union Ck is a steel stringer/multi-beam or girder carrying 48020 309 Str. over East Union Ck in Union County, South Dakota. It was built in 1950 and reconstructed in 1983, 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 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 45 vehicles a day, roughly 2% of them trucks, projected to reach 45 by 2032. The structure is 40 ft (12.3 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 48020 309 Str. over East Union Ck built?
It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1983.
What condition is 48020 309 Str. 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 July 2024.
How much traffic does 48020 309 Str. over East Union Ck carry?
About 45 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 48020 309 Str. over East Union Ck?
The structure is 40 ft (12.3 m) long with a longest span of 38 ft (11.7 m) and a deck 28 ft wide.
Who owns 48020 309 Str. over East Union Ck?
It is owned by the County Highway Agency.