SD050 over Big Sioux River
GoodUnion County, South Dakota · At South Dakota Border · Structure no. 000000064086223
- Built
- 2010
- 15 years old
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 506 ft
- 5 main spans
- Daily traffic
- 1,570
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SD050 over Big Sioux River is a prestressed concrete stringer/multi-beam or girder carrying SD050 over Big Sioux River in Union County, South Dakota. It was built in 2010, so it is 15 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,570 vehicles a day, roughly 2% of them trucks, projected to reach 2,464 by 2043. The structure is 506 ft (154.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 SD050 over Big Sioux River built?
It was built in 2010, making it 15 years old in 2025.
What condition is SD050 over Big Sioux River 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 May 2024.
How much traffic does SD050 over Big Sioux River carry?
About 1,570 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is SD050 over Big Sioux River?
The structure is 506 ft (154.2 m) long with a longest span of 122 ft (37.2 m) and a deck 43 ft wide.
Who owns SD050 over Big Sioux River?
It is owned by the State Highway Agency.