Mn 243 over St Croix River
Chisago County, Minnesota · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mn 243 over St Croix River in Chisago County, Minnesota, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1953 and reconstructed in 1980, making it 72 years old at the 2025 inventory.
- It carries about 5,686 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 1 of the 61 inventoried bridges in Chisago County rated poor (1.6%); 1 (1.6%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (45.32134, -92.70995)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 5 | Fair condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Steel deck truss |
| Length | about 673 ft |
| Location | at Wisconsin State Line |
| NBI structure number | 6347 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Minnesota department of transportation.
Busiest bridges in Chisago County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 35 over Rush Creek | 1967 | 27,920 | Fair |
| Mn 95 over I 35 | 2010 | 20,467 | Good |
| US 8 over Channel | 2012 | 19,638 | Good |
| US 61 over I 35 | 1967 | 14,200 | Fair |
| US 61 over S Br Sunrise River | 1967 | 14,200 | Good |
| US 8 over Center Lake Channel | 2005 | 13,800 | Fair |
All bridges nearby: Chisago County, MN bridge conditions · every bridge in Chisago County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.