SD021 over Dolph Ck
FairHamlin County, South Dakota · 0.2 N JCT Sd 28 · Structure no. 000000029135148
- Built
- 1985
- 40 years old
- Condition
- Fair
- inspected September 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 37 ft
- 3 main spans
- Daily traffic
- 711
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD021 over Dolph Ck is a concrete continuous culvert carrying SD021 over Dolph Ck in Hamlin County, South Dakota. It was built in 1985, so it is 40 years old, younger 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 711 vehicles a day, roughly 6% of them trucks, projected to reach 1,070 by 2044. The structure is 37 ft (11.3 m) long. If it were closed, the detour would be 3.1 mi (5 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 |
|---|---|---|
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD021 over Dolph Ck built?
It was built in 1985, making it 40 years old in 2025.
What condition is SD021 over Dolph 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 September 2023.
How much traffic does SD021 over Dolph Ck carry?
About 711 vehicles per day (2024 count), of which roughly 6% are trucks.
How long is SD021 over Dolph Ck?
The structure is 37 ft (11.3 m) long with a longest span of 12 ft (3.7 m).
Who owns SD021 over Dolph Ck?
It is owned by the State Highway Agency.