30410 390 Ave over Mosquito Ck
PoorPosted for loadCharles Mix County, South Dakota · 7.1S 4.8W of Wagner · Structure no. 000000012462361
- Built
- 1941
- 84 years old
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 25 ft
- 1 main span
- Daily traffic
- 48
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
30410 390 Ave over Mosquito Ck is a steel stringer/multi-beam or girder carrying 30410 390 Ave over Mosquito Ck in Charles Mix County, South Dakota. It was built in 1941, so it is 84 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. Its operating status is: posted for load restriction.
It carries about 48 vehicles a day, roughly 2% of them trucks, projected to reach 48 by 2032. The structure is 25 ft (7.6 m) long and 16 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 | 8 Very Good | No problems noted. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 30410 390 Ave over Mosquito Ck built?
It was built in 1941, making it 84 years old in 2025.
What condition is 30410 390 Ave over Mosquito 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 30410 390 Ave over Mosquito Ck carry?
About 48 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 30410 390 Ave over Mosquito Ck?
The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 16 ft wide.
Who owns 30410 390 Ave over Mosquito Ck?
It is owned by the County Highway Agency.