45170 313 ST over Unnamed Creek
PoorYankton County, South Dakota · 7 S & 0.7 E Volin · Structure no. 000000068237220
- Built
- 1940
- 85 years old
- Condition
- Poor
- inspected August 2024
- Type
- Slab
- Concrete Continuous
- Length
- 34 ft
- 3 main spans
- Daily traffic
- 45
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
45170 313 ST over Unnamed Creek is a concrete continuous slab carrying 45170 313 ST over Unnamed Creek in Yankton County, South Dakota. It was built in 1940, so it is 85 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 45 vehicles a day, roughly 2% of them trucks, projected to reach 45 by 2032. The structure is 34 ft (10.5 m) long and 20 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 45170 313 ST over Unnamed Creek built?
It was built in 1940, making it 85 years old in 2025.
What condition is 45170 313 ST over Unnamed Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.
How much traffic does 45170 313 ST over Unnamed Creek carry?
About 45 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 45170 313 ST over Unnamed Creek?
The structure is 34 ft (10.5 m) long with a longest span of 10 ft (3.1 m) and a deck 20 ft wide.
Who owns 45170 313 ST over Unnamed Creek?
It is owned by the County Highway Agency.