Cth V NB over Ih 43/STH 57
Ozaukee County, Wisconsin · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Cth V NB over Ih 43/STH 57 in Ozaukee County, Wisconsin, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1975, making it 50 years old at the 2025 inventory.
- It carries about 14,800 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 76 of the 106 inventoried bridges in Ozaukee County rated fair (71.7%); 3 (2.8%) 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 July 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 → (43.33971, -87.92517)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 392 ft |
| Location | 3.7 Mi S Jct Sth 33 |
| NBI structure number | B45003000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 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 Ozaukee County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih 43-sth 32-sth 5 over Br Milwaukee River | 1966 | 50,300 | Fair |
| Ih 43 Nb-sth 32 NB over Sth 57-sth 167-mequon Rd | 2024 | 34,300 | Good |
| Ih 43 Sb-sth 32 SB over Sth 57-sth 167-mequon Rd | 2024 | 34,300 | Fair |
| Ih 43 Sb-sth 32 SB over Lrd Lakefield Rd | 2023 | 26,600 | Good |
| Ih 43-sth 32 over Sucker Creek | 1974 | 26,300 | Fair |
| Ih 43-sth 32 over Sucker Creek | 1974 | 26,300 | Fair |
All bridges nearby: Ozaukee County, WI bridge conditions · every bridge in Ozaukee County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.