Csah 20 over Fountain Lake
Freeborn County, Minnesota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Csah 20 over Fountain Lake in Freeborn 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 1997, making it 28 years old at the 2025 inventory.
- It carries about 4,400 vehicles a day (traffic count year 2017).
- Its listed owner is the county highway agency.
- It is one of 70 of the 144 inventoried bridges in Freeborn County rated fair (48.6%); 4 (2.8%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated good in the 2024 inventory and is now fair (deck 7 to 6, superstructure 7 to 6).
- Its most recent inspection on record is dated December 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 → (43.66697, -93.37668)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 6 | Satisfactory condition |
| Superstructure | 7 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 98 ft |
| Location | 0.9 Mi W of Jct Csah 22 |
| NBI structure number | 24530 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Minnesota department of transportation.
Busiest bridges in Freeborn County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 35 over Ditch | 1965 | 20,576 | Fair |
| I 35 over Co Ditch # 10 | 1970 | 18,156 | Fair |
| US 65 over Shell Rock River | 2000 | 15,100 | Good |
| US 65 over UP RR | 2000 | 15,100 | Good |
| I 90 over Bancroft Creek | 1968 | 12,600 | Good |
| I 35 over Th 65; UP RR | 1970 | 11,310 | Fair |
All bridges nearby: Freeborn County, MN bridge conditions · every bridge in Freeborn County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.