SD020 over I029
FairCodington County, South Dakota · I 29 & Sd 20 Interchange · Structure no. 000000015215030
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 293 ft
- 2 main spans
- Daily traffic
- 844
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD020 over I029 is a steel continuous stringer/multi-beam or girder carrying SD020 over I029 in Codington County, South Dakota. It was built in 1974, so it is 51 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 844 vehicles a day, roughly 9% of them trucks, projected to reach 1,188 by 2044. The structure is 293 ft (89.3 m) long and 47 ft wide.
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD020 over I029 built?
It was built in 1974, making it 51 years old in 2025.
What condition is SD020 over I029 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 May 2023.
How much traffic does SD020 over I029 carry?
About 844 vehicles per day (2024 count), of which roughly 9% are trucks.
How long is SD020 over I029?
The structure is 293 ft (89.3 m) long with a longest span of 111 ft (33.8 m) and a deck 47 ft wide.
Who owns SD020 over I029?
It is owned by the State Highway Agency.