Mn 1 over Blackduck River
Beltrami County, Minnesota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mn 1 over Blackduck River in Beltrami County, Minnesota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2013, making it 12 years old at the 2025 inventory.
- It carries about 342 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 64 of the 101 inventoried bridges in Beltrami County rated good (63.4%); 3 (3.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated May 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (47.87551, -94.71217)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 122 ft |
| Location | 10.4 Mi E of Redby |
| NBI structure number | 04015 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Minnesota department of transportation.
Busiest bridges in Beltrami County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mn 197 over Mississippi River | 2002 | 11,600 | Good |
| Mn 197 over Mississippi River | 2002 | 11,600 | Fair |
| US 2 over BNSF; Cp Rail | 1978 | 7,850 | Fair |
| US 2 over BNSF; Cp Rail | 1978 | 7,850 | Fair |
| Mn 1 over Pike Creek | 2020 | 6,000 | Good |
| US 2 over Csah 7 | 1978 | 5,200 | Good |
All bridges nearby: Beltrami County, MN bridge conditions · every bridge in Beltrami County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.