T 340 over Big Cottonwood River
Lyon County, Minnesota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- T 340 over Big Cottonwood River in Lyon County, Minnesota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 9 (excellent condition) on the 0-9 scale.
- It was built in 2008, making it 17 years old at the 2025 inventory.
- It carries about 30 vehicles a day (traffic count year 2007).
- Its listed owner is a town or township highway agency.
- It is one of 177 of the 234 inventoried bridges in Lyon County rated good (75.6%); 6 (2.6%) 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 → (44.26649, -95.74691)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 9 | Excellent condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 48 ft |
| Location | 0.3 Mi NE of Jct Th 59 |
| NBI structure number | 42J26 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Minnesota department of transportation.
Busiest bridges in Lyon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 59 over Redwood River | 1950 | 9,500 | Fair |
| Mn 19 over Redwood River | 1931 | 8,800 | Fair |
| Mn 19 over Redwood River | 1975 | 8,300 | Fair |
| Mn 23 over Ditch | 1999 | 5,910 | Good |
| Mn 23 over Redwood River | 1973 | 5,204 | Fair |
| US 59 over Redwood R Diversion Chan | 1962 | 5,200 | Fair |
All bridges nearby: Lyon County, MN bridge conditions · every bridge in Lyon County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.