450th Avenue over Little Minnesota River
PoorPosted for loadRoberts County, South Dakota · 5W & 1N of Claire City · Structure no. 000000055010046
- Built
- 1950
- 75 years old
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 24 ft
- 2 main spans
- Daily traffic
- 35
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
450th Avenue over Little Minnesota River is a wood or timber stringer/multi-beam or girder carrying 450th Avenue over Little Minnesota River in Roberts County, South Dakota. It was built in 1950, so it is 75 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 4 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 35 vehicles a day, roughly 2% of them trucks, projected to reach 35 by 2032. The structure is 24 ft (7.3 m) long and 24 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 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 | 4 Poor | Advanced section loss, deterioration, 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 450th Avenue over Little Minnesota River built?
It was built in 1950, making it 75 years old in 2025.
What condition is 450th Avenue over Little Minnesota River 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 450th Avenue over Little Minnesota River carry?
About 35 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 450th Avenue over Little Minnesota River?
The structure is 24 ft (7.3 m) long with a longest span of 12 ft (3.7 m) and a deck 24 ft wide.
Who owns 450th Avenue over Little Minnesota River?
It is owned by the County Highway Agency.