T 412 over Grand Marais River
FairPolk County, Minnesota · 1.6 MI N of JCT Csah 63 · Structure no. 96868
- Built
- 1990
- 35 years old
- Condition
- Fair
- inspected October 2024
- Type
- Culvert
- Concrete
- Length
- 30 ft
- 2 main spans
- Daily traffic
- 20
- 1973 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
T 412 over Grand Marais River is a concrete culvert carrying T 412 over Grand Marais River in Polk County, Minnesota. It was built in 1990, so it is 35 years old, younger 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 20 vehicles a day, projected to reach 20 by 2029. The structure is 30 ft (9 m) long. If it were closed, the detour would be 3.1 mi (5 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was T 412 over Grand Marais River built?
It was built in 1990, making it 35 years old in 2025.
What condition is T 412 over Grand Marais 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 2024.
How much traffic does T 412 over Grand Marais River carry?
About 20 vehicles per day (1973 count).
How long is T 412 over Grand Marais River?
The structure is 30 ft (9 m) long with a longest span of 12 ft (3.7 m).
Who owns T 412 over Grand Marais River?
It is owned by the Town or Township Highway Agency.