Mn 4 over Minnesota River
FairBrown County, Minnesota · 9.8 MI N of JCT TH 14 · Structure no. 08003
- Built
- 1995
- 30 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 496 ft
- 5 main spans
- Daily traffic
- 1,400
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 4 over Minnesota River is a prestressed concrete stringer/multi-beam or girder carrying Mn 4 over Minnesota River in Brown County, Minnesota. It was built in 1995, so it is 30 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 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 1,400 vehicles a day, roughly 19% of them trucks, projected to reach 1,450 by 2041. The structure is 496 ft (151.2 m) long and 42 ft wide. If it were closed, the detour would be 24.9 mi (40 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mn 4 over Minnesota River built?
It was built in 1995, making it 30 years old in 2025.
What condition is Mn 4 over Minnesota 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 4 over Minnesota River carry?
About 1,400 vehicles per day (2021 count), of which roughly 19% are trucks.
How long is Mn 4 over Minnesota River?
The structure is 496 ft (151.2 m) long with a longest span of 98 ft (30 m) and a deck 42 ft wide.
Who owns Mn 4 over Minnesota River?
It is owned by the State Highway Agency.