421st Avenue over Creek
FairMarshall County, South Dakota · 3.7S & 2W of Britton · Structure no. 000000046090137
- Built
- 1971
- 54 years old
- Condition
- Fair
- inspected June 2023
- Type
- Tee Beam
- Concrete
- Length
- 25 ft
- 1 main span
- Daily traffic
- 35
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
421st Avenue over Creek is a concrete tee beam carrying 421st Avenue over Creek in Marshall County, South Dakota. It was built in 1971, so it is 54 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 35 vehicles a day, roughly 2% of them trucks, projected to reach 35 by 2032. The structure is 25 ft (7.6 m) long and 26 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 5 or 6. Minor deterioration is present but the structure is sound.
| 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 421st Avenue over Creek built?
It was built in 1971, making it 54 years old in 2025.
What condition is 421st Avenue over 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 June 2023.
How much traffic does 421st Avenue over Creek carry?
About 35 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 421st Avenue over Creek?
The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 26 ft wide.
Who owns 421st Avenue over Creek?
It is owned by the County Highway Agency.