Jackson Blvd over Spearfish Ck
FairLawrence County, South Dakota · Jackson Blvd - Spearfish · Structure no. 000000041092079
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected October 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 72 ft
- 1 main span
- Daily traffic
- 12,135
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Jackson Blvd over Spearfish Ck is a prestressed concrete box beam or girders - multiple carrying Jackson Blvd over Spearfish Ck in Lawrence County, South Dakota. It was built in 1966, so it is 59 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 12,135 vehicles a day, roughly 5% of them trucks, projected to reach 12,135 by 2035. The structure is 72 ft (21.9 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
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. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Jackson Blvd over Spearfish Ck built?
It was built in 1966, making it 59 years old in 2025.
What condition is Jackson Blvd over Spearfish Ck 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 October 2023.
How much traffic does Jackson Blvd over Spearfish Ck carry?
About 12,135 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is Jackson Blvd over Spearfish Ck?
The structure is 72 ft (21.9 m) long with a longest span of 69 ft (21 m) and a deck 60 ft wide.
Who owns Jackson Blvd over Spearfish Ck?
It is owned by the City or Municipal Highway Agency.