Cth Oo (winnebago over Ih 41
Fond du Lac County, Wisconsin · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Cth Oo (winnebago over Ih 41 in Fond du Lac County, Wisconsin, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1973 and reconstructed in 2009, making it 52 years old at the 2025 inventory.
- It carries about 4,300 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 98 of the 252 inventoried bridges in Fond du Lac County rated fair (38.9%); 27 (10.7%) 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 April 2023, 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 → (43.80667, -88.49833)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 297 ft |
| Location | 0.1M E Jct Cth Vvv |
| NBI structure number | B20005900000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wisconsin department of transportation.
Busiest bridges in Fond du Lac County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih 41 over Supple Marsh Creek | 1951 | 44,700 | Fair |
| Sth 23 over Lrd Brooke Street | 2001 | 29,100 | Fair |
| Ih 41 NB over W Br Fond Du Lac River | 1953 | 21,450 | Fair |
| Ih 41 SB over W Br Fond Du Lac River | 1961 | 21,450 | Good |
| Ush 41 NB over Cth N | 1999 | 21,450 | Good |
| Ih 41 SB over Cth N | 1999 | 21,450 | Fair |
All bridges nearby: Fond du Lac County, WI bridge conditions · every bridge in Fond du Lac County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.