SD030 over I029
FairBrookings County, South Dakota · Sd 30 Interchange · Structure no. 000000006185080
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 279 ft
- 2 main spans
- Daily traffic
- 1,620
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD030 over I029 is a steel continuous stringer/multi-beam or girder carrying SD030 over I029 in Brookings County, South Dakota. It was built in 1970, so it is 55 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 6 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 1,620 vehicles a day, roughly 11% of them trucks, projected to reach 2,436 by 2044. The structure is 279 ft (85 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 SD030 over I029 built?
It was built in 1970, making it 55 years old in 2025.
What condition is SD030 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 July 2023.
How much traffic does SD030 over I029 carry?
About 1,620 vehicles per day (2024 count), of which roughly 11% are trucks.
How long is SD030 over I029?
The structure is 279 ft (85 m) long with a longest span of 105 ft (32 m) and a deck 47 ft wide.
Who owns SD030 over I029?
It is owned by the State Highway Agency.