Csah 61 over St Louis River
Carlton County, Minnesota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Csah 61 over St Louis River in Carlton 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 1987, making it 38 years old at the 2025 inventory.
- It carries about 4,973 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 72 of the 148 inventoried bridges in Carlton County rated good (48.6%); 13 (8.8%) 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 November 2024, on a 12-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 → (46.70398, -92.4174)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 532 ft |
| Location | 0.5 Mi NE of Th 35 |
| NBI structure number | 09513 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 4: foundations stable, field review says exposed foundations need protection |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Minnesota department of transportation.
Busiest bridges in Carlton County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 35 over Portage River | 1968 | 16,400 | Fair |
| Mn 33 over I 35 | 1965 | 16,100 | Fair |
| I 35 over St Louis River | 1971 | 14,250 | Fair |
| I 35 over St Louis River | 1971 | 14,250 | Fair |
| I 35 over Korby Road | 1973 | 14,250 | Good |
| I 35 over Korby Road | 1973 | 14,250 | Good |
All bridges nearby: Carlton County, MN bridge conditions · every bridge in Carlton County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.