Mn 11 over Black River
FairKoochiching County, Minnesota · At Loman · Structure no. 36019
- Built
- 1986
- 39 years old
- Condition
- Fair
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 175 ft
- 2 main spans
- Daily traffic
- 731
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 11 over Black River is a prestressed concrete stringer/multi-beam or girder carrying Mn 11 over Black River in Koochiching County, Minnesota. It was built in 1986, so it is 39 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 731 vehicles a day, roughly 20% of them trucks, projected to reach 690 by 2042. The structure is 175 ft (53.2 m) long and 42 ft wide. If it were closed, the detour would be 98.2 mi (158 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 | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mn 11 over Black River built?
It was built in 1986, making it 39 years old in 2025.
What condition is Mn 11 over Black 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 April 2024.
How much traffic does Mn 11 over Black River carry?
About 731 vehicles per day (2022 count), of which roughly 20% are trucks.
How long is Mn 11 over Black River?
The structure is 175 ft (53.2 m) long with a longest span of 87 ft (26.4 m) and a deck 42 ft wide.
Who owns Mn 11 over Black River?
It is owned by the State Highway Agency.