Csah 48 over Madison Lake Channel
Blue Earth County, Minnesota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Csah 48 over Madison Lake Channel in Blue Earth 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 2005, making it 20 years old at the 2025 inventory.
- It carries about 656 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 88 of the 193 inventoried bridges in Blue Earth County rated good (45.6%); 12 (6.2%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: deck 8 to 7, superstructure 8 to 7, substructure 8 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 → (44.17335, -93.79459)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 7 | Good condition |
| Superstructure | 8 | 7 | Good condition |
| Substructure | 8 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 93 ft |
| Location | 0.7 Mi NE of Jct Csah 17 |
| NBI structure number | 07583 |
| 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 Blue Earth County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 14 over Minn River; Trail | 1976 | 39,000 | Fair |
| US 14 over Th 169 | 1976 | 39,000 | Fair |
| US 169 over Minn R UP RR; Str | 1960 | 34,432 | Fair |
| US 169 over Sibley St | 1992 | 23,523 | Fair |
| US 169 over Off Ramp From US 169 | 1987 | 23,523 | Fair |
| Unu 169 over Minn R UP RR; Street | 1985 | 22,949 | Poor |
All bridges nearby: Blue Earth County, MN bridge conditions · every bridge in Blue Earth County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.