378th Avenue over Richmond Lake
GoodBrown County, South Dakota · 5.6N & 7.2W of Aberdeen · Structure no. 000000007040275
- Built
- 2019
- 6 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 60 ft
- 1 main span
- Daily traffic
- 98
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
378th Avenue over Richmond Lake is a steel stringer/multi-beam or girder carrying 378th Avenue over Richmond Lake in Brown County, South Dakota. It was built in 2019, so it is 6 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 good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 98 vehicles a day, roughly 2% of them trucks, projected to reach 98 by 2032. The structure is 60 ft (18.3 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 378th Avenue over Richmond Lake built?
It was built in 2019, making it 6 years old in 2025.
What condition is 378th Avenue over Richmond Lake in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.
How much traffic does 378th Avenue over Richmond Lake carry?
About 98 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 378th Avenue over Richmond Lake?
The structure is 60 ft (18.3 m) long with a longest span of 59 ft (18 m) and a deck 33 ft wide.
Who owns 378th Avenue over Richmond Lake?
It is owned by the County Highway Agency.