Mn 43 over Mississippi River
Winona County, Minnesota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mn 43 over Mississippi River in Winona County, Minnesota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1943 and reconstructed in 1997, making it 82 years old at the 2025 inventory.
- It carries about 9,809 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 128 of the 237 inventoried bridges in Winona County rated fair (54.0%); 9 (3.8%) 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 June 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (44.06278, -91.63706)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 1,008 ft |
| Location | at State Line |
| NBI structure number | 5930 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 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 Winona County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 90 over 3 St S | 2010 | 21,406 | Good |
| I 90 over 3 St S | 2009 | 21,200 | Good |
| US 61 over Gilmore Creek | 1957 | 19,900 | Fair |
| I 90 over Aoi; Mississippi River | 2016 | 13,950 | Fair |
| I 90 over Aoi; Mississippi River | 2015 | 13,950 | Good |
| I 90 over Ramps; Aoi Access; Cp RR | 2015 | 13,950 | Fair |
All bridges nearby: Winona County, MN bridge conditions · every bridge in Winona County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.