SD050 over Marne Ck
FairYankton County, South Dakota · 0.8 E JCT US 81 · Structure no. 000000068129205
- Built
- 1971
- 54 years old
- Condition
- Fair
- inspected February 2025
- Type
- Slab
- Concrete Continuous
- Length
- 119 ft
- 3 main spans
- Daily traffic
- 9,753
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD050 over Marne Ck is a concrete continuous slab carrying SD050 over Marne Ck in Yankton County, South Dakota. It was built in 1971, so it is 54 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 9,753 vehicles a day, roughly 7% of them trucks, projected to reach 13,713 by 2044. The structure is 119 ft (36.3 m) long and 55 ft wide. If it were closed, the detour would be 59 mi (95 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD050 over Marne Ck built?
It was built in 1971, making it 54 years old in 2025.
What condition is SD050 over Marne 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 2025.
How much traffic does SD050 over Marne Ck carry?
About 9,753 vehicles per day (2024 count), of which roughly 7% are trucks.
How long is SD050 over Marne Ck?
The structure is 119 ft (36.3 m) long with a longest span of 43 ft (13 m) and a deck 55 ft wide.
Who owns SD050 over Marne Ck?
It is owned by the State Highway Agency.