SD073 over Grindstone Ck
FairHaakon County, South Dakota · 2.5 N JCT US 14 · Structure no. 000000028170459
- Built
- 1954
- 71 years old
- Condition
- Fair
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 118 ft
- 3 main spans
- Daily traffic
- 700
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD073 over Grindstone Ck is a steel stringer/multi-beam or girder carrying SD073 over Grindstone Ck in Haakon County, South Dakota. It was built in 1954, so it is 71 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 700 vehicles a day, roughly 35% of them trucks, projected to reach 995 by 2044. The structure is 118 ft (36.1 m) long and 32 ft wide. If it were closed, the detour would be 52.2 mi (84 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD073 over Grindstone Ck built?
It was built in 1954, making it 71 years old in 2025.
What condition is SD073 over Grindstone 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 February 2024.
How much traffic does SD073 over Grindstone Ck carry?
About 700 vehicles per day (2024 count), of which roughly 35% are trucks.
How long is SD073 over Grindstone Ck?
The structure is 118 ft (36.1 m) long with a longest span of 38 ft (11.5 m) and a deck 32 ft wide.
Who owns SD073 over Grindstone Ck?
It is owned by the State Highway Agency.