Mn 4 over Minnesota River
Brown County, Minnesota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mn 4 over Minnesota River in Brown County, Minnesota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1995, making it 30 years old at the 2025 inventory.
- It carries about 1,400 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 38 of the 108 inventoried bridges in Brown County rated fair (35.2%); 3 (2.8%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (44.43378, -94.71722)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 496 ft |
| Location | 9.8 Mi N of Jct Th 14 |
| NBI structure number | 08003 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Minnesota department of transportation.
Busiest bridges in Brown County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 14 over Minnesota River | 2019 | 8,262 | Good |
| US 14 over Front St; Cp RR | 2018 | 8,262 | Good |
| Msas 110 over Minnesota River | 1978 | 6,924 | Poor |
| Mn 15 over Cottonwood River | 1983 | 6,200 | Fair |
| Csah 29 over Dm E RR | 1988 | 5,400 | Fair |
| Mn 15 over Little Cottonwood River | 1988 | 3,450 | Fair |
All bridges nearby: Brown County, MN bridge conditions · every bridge in Brown County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.