Ih 39 /ih 90 over Br Rock River
Rock County, Wisconsin · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ih 39 /ih 90 over Br Rock River in Rock County, Wisconsin, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 2018, making it 7 years old at the 2025 inventory.
- It carries about 57,700 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 168 of the 304 inventoried bridges in Rock County rated good (55.3%); 13 (4.3%) 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 → (42.61893, -88.98269)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 28 ft |
| Location | 1.1M S Jct Sth 11 |
| NBI structure number | B53032000000000 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wisconsin department of transportation.
Busiest bridges in Rock County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih 39 SB / Ih 90 E over Spring Brook / Spring Br | 2019 | 38,500 | Good |
| Ih 39 NB / Ih 90 W over Spring Brook / Spring Br | 2018 | 38,500 | Good |
| Ih 39 SB / Ih 90 E over Cth O | 2003 | 32,550 | Good |
| Ih 39 NB/90 WB over Cth O/ East Delavan Road | 2004 | 32,550 | Good |
| Ih 39 SB / Ih 90 E over Cnw RR | 2019 | 32,550 | Good |
| Ih 39 NB / Ih 90 W over Cnw/up RR | 2018 | 32,550 | Good |
All bridges nearby: Rock County, WI bridge conditions · every bridge in Rock County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.