Mn 1 over Big Fork River
FairItasca County, Minnesota · 6.3 MI E of Effie · Structure no. 5762
- Built
- 1938
- 87 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 123 ft
- 2 main spans
- Daily traffic
- 380
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 1 over Big Fork River is a prestressed concrete stringer/multi-beam or girder carrying Mn 1 over Big Fork River in Itasca County, Minnesota. It was built in 1938, so it is 87 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 380 vehicles a day, roughly 24% of them trucks, projected to reach 430 by 2039. The structure is 123 ft (37.4 m) long and 39 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mn 1 over Big Fork River built?
It was built in 1938, making it 87 years old in 2025.
What condition is Mn 1 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 1 over Big Fork River carry?
About 380 vehicles per day (2019 count), of which roughly 24% are trucks.
How long is Mn 1 over Big Fork River?
The structure is 123 ft (37.4 m) long with a longest span of 59 ft (18 m) and a deck 39 ft wide.
Who owns Mn 1 over Big Fork River?
It is owned by the State Highway Agency.