Mn 55 over Bois De Sioux River
FairWilkin County, Minnesota · At N Dakota State Line · Structure no. 84001
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected August 2024
- Type
- Girder and Floorbeam System
- Concrete
- Length
- 115 ft
- 3 main spans
- Daily traffic
- 711
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 55 over Bois De Sioux River is a concrete girder and floorbeam system carrying Mn 55 over Bois De Sioux River in Wilkin County, Minnesota. It was built in 1961, so it is 64 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 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 711 vehicles a day, roughly 35% of them trucks, projected to reach 960 by 2042. The structure is 115 ft (35.1 m) long and 32 ft wide. If it were closed, the detour would be 21.7 mi (35 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mn 55 over Bois De Sioux River built?
It was built in 1961, making it 64 years old in 2025.
What condition is Mn 55 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 August 2024.
How much traffic does Mn 55 over Bois De Sioux River carry?
About 711 vehicles per day (2022 count), of which roughly 35% are trucks.
How long is Mn 55 over Bois De Sioux River?
The structure is 115 ft (35.1 m) long with a longest span of 44 ft (13.3 m) and a deck 32 ft wide.
Who owns Mn 55 over Bois De Sioux River?
It is owned by the State Highway Agency.