SD258 over I090
GoodAurora County, South Dakota · Plankinton Interchange · Structure no. 00000000215C158
- Built
- 1965
- 60 years old
- Condition
- Good
- inspected March 2025
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 266 ft
- 4 main spans
- Daily traffic
- 798
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD258 over I090 is a steel continuous stringer/multi-beam or girder carrying SD258 over I090 in Aurora County, South Dakota. It was built in 1965, so it is 60 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 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 798 vehicles a day, roughly 5% of them trucks, projected to reach 1,185 by 2044. The structure is 266 ft (81.2 m) long and 33 ft wide.
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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD258 over I090 built?
It was built in 1965, making it 60 years old in 2025.
What condition is SD258 over I090 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 March 2025.
How much traffic does SD258 over I090 carry?
About 798 vehicles per day (2024 count), of which roughly 5% are trucks.
How long is SD258 over I090?
The structure is 266 ft (81.2 m) long with a longest span of 75 ft (22.9 m) and a deck 33 ft wide.
Who owns SD258 over I090?
It is owned by the State Highway Agency.