Mn 4 over Little Cottonwood River
Brown County, Minnesota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mn 4 over Little Cottonwood River in Brown County, Minnesota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2011, making it 14 years old at the 2025 inventory.
- It carries about 1,057 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 67 of the 108 inventoried bridges in Brown County rated good (62.0%); 3 (2.8%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated fair in the 2024 inventory and is now good (superstructure 8 to 7, deck 6 to 7).
- Its most recent inspection on record is dated September 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 → (44.19386, -94.72514)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 7 | Good condition |
| Superstructure | 8 | 7 | Good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 105 ft |
| Location | 7.2 Mi S of Jct Th 14 |
| NBI structure number | 08006 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 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 Brown County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 14 over Minnesota River | 2019 | 8,262 | Good |
| US 14 over Front St; Cp RR | 2018 | 8,262 | Good |
| Msas 110 over Minnesota River | 1978 | 6,924 | Poor |
| Mn 15 over Cottonwood River | 1983 | 6,200 | Fair |
| Csah 29 over Dm E RR | 1988 | 5,400 | Fair |
| Mn 15 over Little Cottonwood River | 1988 | 3,450 | Fair |
All bridges nearby: Brown County, MN bridge conditions · every bridge in Brown County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.