T 99 over Whitney Brook
Mille Lacs County, Minnesota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- T 99 over Whitney Brook in Mille Lacs County, Minnesota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1978, making it 47 years old at the 2025 inventory.
- It carries about 5 vehicles a day (traffic count year 1986).
- Its listed owner is a town or township 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.
- 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 → (45.85138, -93.67786)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 39 ft |
| Location | 0.9 Mi W of Jct Th 169 |
| NBI structure number | 91706 |
| Condition class | Good |
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.