Sioux Conifer Road over Big Sioux Rv
PoorCodington County, South Dakota · 3.6N 2.0W Watertown · Structure no. 000000015170144
- Built
- 1940
- 85 years old, rebuilt 1975
- Condition
- Poor
- inspected June 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 80 ft
- 2 main spans
- Daily traffic
- 1,499
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Sioux Conifer Road over Big Sioux Rv is a prestressed concrete tee beam carrying Sioux Conifer Road over Big Sioux Rv in Codington County, South Dakota. It was built in 1940 and reconstructed in 1975, 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 1,499 vehicles a day, roughly 2% of them trucks, projected to reach 1,499 by 2035. The structure is 80 ft (24.4 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 Sioux Conifer Road over Big Sioux Rv built?
It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1975.
What condition is Sioux Conifer Road over Big Sioux Rv 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 June 2024.
How much traffic does Sioux Conifer Road over Big Sioux Rv carry?
About 1,499 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is Sioux Conifer Road over Big Sioux Rv?
The structure is 80 ft (24.4 m) long with a longest span of 37 ft (11.3 m) and a deck 27 ft wide.
Who owns Sioux Conifer Road over Big Sioux Rv?
It is owned by the County Highway Agency.