30040 478 Ave. over Drainage Ditch
PoorPosted for loadUnion County, South Dakota · 0.5W & 0.6N Alcester · Structure no. 000000064080034
- Built
- 1983
- 42 years old
- 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
30040 478 Ave. over Drainage Ditch is a steel stringer/multi-beam or girder carrying 30040 478 Ave. over Drainage Ditch in Union County, South Dakota. It was built in 1983, so it is 42 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 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 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 29 ft wide. If it were closed, the detour would be 3.1 mi (5 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 30040 478 Ave. over Drainage Ditch built?
It was built in 1983, making it 42 years old in 2025.
What condition is 30040 478 Ave. over Drainage Ditch 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 30040 478 Ave. over Drainage Ditch carry?
About 45 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 30040 478 Ave. over Drainage Ditch?
The structure is 40 ft (12.3 m) long with a longest span of 38 ft (11.7 m) and a deck 29 ft wide.
Who owns 30040 478 Ave. over Drainage Ditch?
It is owned by the County Highway Agency.