Sth 33 over Milwaukee River
Washington County, Wisconsin · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sth 33 over Milwaukee River in Washington County, Wisconsin, 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 1981, making it 44 years old at the 2025 inventory.
- It carries about 7,600 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 83 of the 164 inventoried bridges in Washington County rated fair (50.6%); 13 (7.9%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: substructure 7 to 6, superstructure 8 to 9.
- Its most recent inspection on record is dated September 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 → (43.42494, -88.07773)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 8 | 9 | Excellent condition |
| Substructure | 7 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 145 ft |
| Location | 0.2 Mi E Jct Cth M |
| NBI structure number | B66009300000000 |
| Condition class | Fair |
| 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 Wisconsin department of transportation.
Busiest bridges in Washington County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih 41-ush 45 over Br Cedar Creek | 1970 | 63,100 | Fair |
| Ih 41 Sb-ush 45 SB over Wis & Southern RR | 1952 | 43,700 | Fair |
| Ih 41/USH 45 NB over Menomonee River | 2015 | 40,900 | Good |
| Ih 41/USH 45 SB over Menomonee River | 2015 | 40,900 | Good |
| Ih 41 over Br Cedar Creek | 1975 | 36,800 | Fair |
| Ih I-41/USH 41/USH over Wisc & Southern RR | 1952 | 35,400 | Fair |
All bridges nearby: Washington County, WI bridge conditions · every bridge in Washington County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.