20th ST S over I029
GoodBrookings County, South Dakota · 2 S US 14 Intch · Structure no. 000000006185180
- Built
- 2022
- 3 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 260 ft
- 2 main spans
- Daily traffic
- 2,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
20th ST S over I029 is a prestressed concrete stringer/multi-beam or girder carrying 20th ST S over I029 in Brookings County, South Dakota. It was built in 2022, so it is 3 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 2,500 vehicles a day, roughly 4% of them trucks, projected to reach 11,500 by 2043. The structure is 260 ft (79.3 m) long and 58 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 20th ST S over I029 built?
It was built in 2022, making it 3 years old in 2025.
What condition is 20th ST S over I029 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 August 2023.
How much traffic does 20th ST S over I029 carry?
About 2,500 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is 20th ST S over I029?
The structure is 260 ft (79.3 m) long with a longest span of 135 ft (41.1 m) and a deck 58 ft wide.
Who owns 20th ST S over I029?
It is owned by the State Highway Agency.