Mn 47 over Knife River
FairKanabec County, Minnesota · 7.5 MI S of Isle · Structure no. 5719
- Built
- 1940
- 85 years old
- Condition
- Fair
- inspected August 2024
- Type
- Culvert
- Concrete
- Length
- 39 ft
- 3 main spans
- Daily traffic
- 1,256
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 47 over Knife River is a concrete culvert carrying Mn 47 over Knife River in Kanabec County, Minnesota. It was built in 1940, so it is 85 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 1,256 vehicles a day, roughly 5% of them trucks, projected to reach 1,200 by 2041. The structure is 39 ft (12 m) long. If it were closed, the detour would be 8.7 mi (14 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mn 47 over Knife River built?
It was built in 1940, making it 85 years old in 2025.
What condition is Mn 47 over Knife 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 47 over Knife River carry?
About 1,256 vehicles per day (2021 count), of which roughly 5% are trucks.
How long is Mn 47 over Knife River?
The structure is 39 ft (12 m) long with a longest span of 14 ft (4.3 m).
Who owns Mn 47 over Knife River?
It is owned by the State Highway Agency.