M 309 over Spring Creek
Rice County, Minnesota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- M 309 over Spring Creek in Rice 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 2004, making it 21 years old at the 2025 inventory.
- It carries about 10 vehicles a day (traffic count year 2005).
- Its listed owner is a city or municipal highway agency.
- It is one of 58 of the 143 inventoried bridges in Rice County rated good (40.6%); 4 (2.8%) 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 → (44.43268, -93.1545)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 26 ft |
| Location | In Northfield |
| NBI structure number | 66J41 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Minnesota department of transportation.
Busiest bridges in Rice County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 35 over Heath Creek | 1961 | 34,474 | Fair |
| I 35 over Wolf Creek | 1961 | 33,191 | Fair |
| I 35 over Mud Creek | 1995 | 31,258 | Fair |
| I 35 over Crockers Creek | 1972 | 25,132 | Fair |
| Mn 3 over Cannon River | 1956 | 19,968 | Fair |
| I 35 over Th 19 | 2004 | 19,750 | Fair |
All bridges nearby: Rice County, MN bridge conditions · every bridge in Rice County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.