399th Avenue over Enemy Ck
PoorPosted for loadDavison County, South Dakota · 4.3S & 2E Mt Vernon · Structure no. 000000018050143
- Built
- 1935
- 90 years old, rebuilt 1965
- Condition
- Poor
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 42 ft
- 1 main span
- Daily traffic
- 64
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
399th Avenue over Enemy Ck is a steel stringer/multi-beam or girder carrying 399th Avenue over Enemy Ck in Davison County, South Dakota. It was built in 1935 and reconstructed in 1965, so it is 90 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 64 vehicles a day, roughly 2% of them trucks, projected to reach 64 by 2032. The structure is 42 ft (12.8 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 399th Avenue over Enemy Ck built?
It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1965.
What condition is 399th Avenue over Enemy 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 399th Avenue over Enemy Ck carry?
About 64 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 399th Avenue over Enemy Ck?
The structure is 42 ft (12.8 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.
Who owns 399th Avenue over Enemy Ck?
It is owned by the County Highway Agency.