Mn 56 over Big Cannon River
FairGoodhue County, Minnesota · 2.1 MI N of N JCT TH 19 · Structure no. 6525
- Built
- 1949
- 76 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 228 ft
- 3 main spans
- Daily traffic
- 2,632
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 56 over Big Cannon River is a steel continuous stringer/multi-beam or girder carrying Mn 56 over Big Cannon River in Goodhue County, Minnesota. It was built in 1949, so it is 76 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 2,632 vehicles a day, roughly 19% of them trucks, projected to reach 2,050 by 2042. The structure is 228 ft (69.4 m) long and 39 ft wide. If it were closed, the detour would be 14.3 mi (23 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 56 over Big Cannon River built?
It was built in 1949, making it 76 years old in 2025.
What condition is Mn 56 over Big Cannon 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 July 2023.
How much traffic does Mn 56 over Big Cannon River carry?
About 2,632 vehicles per day (2022 count), of which roughly 19% are trucks.
How long is Mn 56 over Big Cannon River?
The structure is 228 ft (69.4 m) long with a longest span of 100 ft (30.5 m) and a deck 39 ft wide.
Who owns Mn 56 over Big Cannon River?
It is owned by the State Highway Agency.