Sth 42/MAIN St over Ahnapee Trail
Kewaunee County, Wisconsin · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sth 42/MAIN St over Ahnapee Trail in Kewaunee County, Wisconsin, 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 1977, making it 48 years old at the 2025 inventory.
- It carries about 5,700 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 35 of the 92 inventoried bridges in Kewaunee County rated good (38.0%); 5 (5.4%) are rated poor.
- 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 → (44.46881, -87.50139)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 8 | Very good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 159 ft |
| Location | 0.7M N Jct Sth 29 to W |
| NBI structure number | B31001800000000 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wisconsin department of transportation.
Busiest bridges in Kewaunee County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Sth 57 over Unnamed Stream | 2005 | 10,800 | Fair |
| Sth 57 | Cth Dk over Red River | 1958 | 10,100 | Fair |
| Sth 54 over Br School Creek | 1981 | 7,800 | Fair |
| Sth 54 over School Creek | 1997 | 7,800 | Good |
| Sth 54 over School Creek | 1997 | 7,800 | Good |
| Sth 54 over School Creek | 1997 | 7,800 | Fair |
All bridges nearby: Kewaunee County, WI bridge conditions · every bridge in Kewaunee County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.