SD028 over Dolph Ck
FairHamlin County, South Dakota · 3.7 W JCT Sd 21 N · Structure no. 000000029099150
- Built
- 1949
- 76 years old
- Condition
- Fair
- inspected September 2023
- Type
- Slab
- Concrete Continuous
- Length
- 67 ft
- 3 main spans
- Daily traffic
- 1,233
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD028 over Dolph Ck is a concrete continuous slab carrying SD028 over Dolph Ck in Hamlin County, South Dakota. It was built in 1949, so it is 76 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 1,233 vehicles a day, roughly 15% of them trucks, projected to reach 1,856 by 2044. The structure is 67 ft (20.4 m) long and 34 ft wide. If it were closed, the detour would be 24.2 mi (39 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD028 over Dolph Ck built?
It was built in 1949, making it 76 years old in 2025.
What condition is SD028 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 SD028 over Dolph Ck carry?
About 1,233 vehicles per day (2024 count), of which roughly 15% are trucks.
How long is SD028 over Dolph Ck?
The structure is 67 ft (20.4 m) long with a longest span of 23 ft (7.1 m) and a deck 34 ft wide.
Who owns SD028 over Dolph Ck?
It is owned by the State Highway Agency.