Mn 56 over N Br Upper Iowa River
FairMower County, Minnesota · 3.8 MI W of JCT Csah 8 · Structure no. 8491
- Built
- 1940
- 85 years old
- Condition
- Fair
- inspected August 2023
- Type
- Culvert
- Concrete
- Length
- 32 ft
- 3 main spans
- Daily traffic
- 1,357
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 56 over N Br Upper Iowa River is a concrete culvert carrying Mn 56 over N Br Upper Iowa River in Mower 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 1,357 vehicles a day, roughly 21% of them trucks, projected to reach 1,100 by 2042. The structure is 32 ft (9.9 m) long. If it were closed, the detour would be 19.9 mi (32 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mn 56 over N Br Upper Iowa River built?
It was built in 1940, making it 85 years old in 2025.
What condition is Mn 56 over N Br Upper Iowa 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 2023.
How much traffic does Mn 56 over N Br Upper Iowa River carry?
About 1,357 vehicles per day (2022 count), of which roughly 21% are trucks.
How long is Mn 56 over N Br Upper Iowa River?
The structure is 32 ft (9.9 m) long with a longest span of 10 ft (3.2 m).
Who owns Mn 56 over N Br Upper Iowa River?
It is owned by the State Highway Agency.