Cth F over Bull Brook
Polk County, Wisconsin · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Cth F over Bull Brook in Polk County, Wisconsin, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1978, making it 47 years old at the 2025 inventory.
- It carries about 1,400 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 38 of the 72 inventoried bridges in Polk County rated fair (52.8%); 16 (22.2%) are rated poor.
- 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 → (45.28353, -92.31686)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 33 ft |
| Location | 1.5M S Jct Cth J |
| NBI structure number | B48001700000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wisconsin department of transportation.
Busiest bridges in Polk County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ush 8 over St Croix River 07 | 1955 | 14,900 | Fair |
| Ush 8 over Lrd Interstate Park Rd | 1956 | 14,000 | Fair |
| Ush 8 EB over Sth 35 SB / S Vincent St | 1995 | 9,000 | Fair |
| Sth 35 over Osceola CR | 2006 | 7,700 | Fair |
| Ush 8 WB over Sth 35 SB / S Vincent St | 1995 | 7,450 | Fair |
| Ush 8-sth 46 over Apple River | 1973 | 7,400 | Fair |
All bridges nearby: Polk County, WI bridge conditions · every bridge in Polk County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.