Mn 23 over Rum River
Mille Lacs County, Minnesota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mn 23 over Rum River in Mille Lacs County, Minnesota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 2009, making it 16 years old at the 2025 inventory.
- It carries about 9,400 vehicles a day (traffic count year 2018).
- Its listed owner is the state highway agency.
- It is one of 53 of the 107 inventoried bridges in Mille Lacs County rated good (49.5%); 8 (7.5%) 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 August 2023, 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 → (45.74865, -93.66016)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 161 ft |
| Location | 0.7 Mi W of Milaca |
| NBI structure number | 48030 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2023 |
| 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 Mille Lacs County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Csah 29 over W Br Rum River | 2010 | 10,400 | Good |
| Mn 95 over US 169 | 1979 | 10,100 | Fair |
| Mn 95 over Battle Brook | 1956 | 10,100 | Fair |
| US 169 over Bradbury Brook | 1990 | 9,915 | Fair |
| US 169 over W Br Rum River | 1978 | 9,650 | Fair |
| US 169 over W Br Rum River | 1978 | 9,650 | Fair |
All bridges nearby: Mille Lacs County, MN bridge conditions · every bridge in Mille Lacs County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.