Csah 12 over Bois De Sioux River
FairWilkin County, Minnesota · At N Dakota State Line · Structure no. 4720
- Built
- 1930
- 95 years old
- Condition
- Fair
- inspected October 2023
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete
- Length
- 172 ft
- 3 main spans
- Daily traffic
- 9,650
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Csah 12 over Bois De Sioux River is a prestressed concrete box beam or girders - single or spread carrying Csah 12 over Bois De Sioux River in Wilkin County, Minnesota. It was built in 1930, so it is 95 years old, older than the Minnesota average of 38.5 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 9,650 vehicles a day, roughly 9% of them trucks, projected to reach 11,000 by 2042. The structure is 172 ft (52.4 m) long and 65 ft wide. If it were closed, the detour would be 5 mi (8 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 Csah 12 over Bois De Sioux River built?
It was built in 1930, making it 95 years old in 2025.
What condition is Csah 12 over Bois De Sioux River 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 October 2023.
How much traffic does Csah 12 over Bois De Sioux River carry?
About 9,650 vehicles per day (2022 count), of which roughly 9% are trucks.
How long is Csah 12 over Bois De Sioux River?
The structure is 172 ft (52.4 m) long with a longest span of 43 ft (13.1 m) and a deck 65 ft wide.
Who owns Csah 12 over Bois De Sioux River?
It is owned by the County Highway Agency.