Mn 310 over Roseau River
Roseau County, Minnesota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mn 310 over Roseau River in Roseau County, Minnesota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1972, making it 53 years old at the 2025 inventory.
- It carries about 350 vehicles a day (traffic count year 2018).
- Its listed owner is the state highway agency.
- It is one of 39 of the 142 inventoried bridges in Roseau County rated fair (27.5%); 4 (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 → (48.92335, -95.76875)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 429 ft |
| Location | 5.2 Mi N of Jct TH11 |
| NBI structure number | 68002 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Minnesota department of transportation.
Busiest bridges in Roseau County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mn 11 over Warroad River | 1970 | 6,870 | Fair |
| Mn 11 over Roseau R Watershed | 2005 | 5,800 | Good |
| Mn 11 over Roseau River | 1938 | 5,400 | Fair |
| Mn 11 over Hay Creek | 1969 | 3,071 | Fair |
| Mn 11 over Roseau R Diversion Chan | 2009 | 3,071 | Good |
| Csah 72 over Roseau River | 1971 | 2,912 | Good |
All bridges nearby: Roseau County, MN bridge conditions · every bridge in Roseau County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.