400th Avenue over Mud Creek
FairPosted for loadBrown County, South Dakota · 4E & 0.9S of Stratford · Structure no. 000000007240439
- Built
- 1956
- 69 years old
- Condition
- Fair
- inspected September 2023
- Type
- Slab
- Concrete Continuous
- Length
- 186 ft
- 5 main spans
- Daily traffic
- 46
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
400th Avenue over Mud Creek is a concrete continuous slab carrying 400th Avenue over Mud Creek in Brown County, South Dakota. It was built in 1956, so it is 69 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.
It carries about 46 vehicles a day, roughly 3% of them trucks, projected to reach 46 by 2032. The structure is 186 ft (56.7 m) long and 29 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 400th Avenue over Mud Creek built?
It was built in 1956, making it 69 years old in 2025.
What condition is 400th Avenue over Mud Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.
How much traffic does 400th Avenue over Mud Creek carry?
About 46 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is 400th Avenue over Mud Creek?
The structure is 186 ft (56.7 m) long with a longest span of 40 ft (12.2 m) and a deck 29 ft wide.
Who owns 400th Avenue over Mud Creek?
It is owned by the County Highway Agency.