Mn 6 over Big Fork River
FairKoochiching County, Minnesota · 14.2 MI S of JCT TH 71 · Structure no. 36010
- Built
- 1977
- 48 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 213 ft
- 3 main spans
- Daily traffic
- 275
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 6 over Big Fork River is a steel continuous stringer/multi-beam or girder carrying Mn 6 over Big Fork River in Koochiching County, Minnesota. It was built in 1977, so it is 48 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 275 vehicles a day, roughly 22% of them trucks, projected to reach 310 by 2042. The structure is 213 ft (64.9 m) long and 46 ft wide. If it were closed, the detour would be 57.2 mi (92 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Mn 6 over Big Fork River built?
It was built in 1977, making it 48 years old in 2025.
What condition is Mn 6 over Big Fork 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 May 2024.
How much traffic does Mn 6 over Big Fork River carry?
About 275 vehicles per day (2022 count), of which roughly 22% are trucks.
How long is Mn 6 over Big Fork River?
The structure is 213 ft (64.9 m) long with a longest span of 80 ft (24.4 m) and a deck 46 ft wide.
Who owns Mn 6 over Big Fork River?
It is owned by the State Highway Agency.