Cth J over Bull Brook
Polk County, Wisconsin · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Cth J over Bull Brook in Polk County, Wisconsin, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2017, making it 8 years old at the 2025 inventory.
- It carries about 1,400 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 18 of the 72 inventoried bridges in Polk County rated good (25.0%); 16 (22.2%) 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 April 2022, on a 48-month routine inspection cycle.
- 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 → (45.31019, -92.30072)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 9 | 9 | Excellent condition |
Bridge details
| Structure | Concrete slab |
| Length | about 49 ft |
| Location | 0.8M W Jct Cth Jj |
| NBI structure number | B48005200000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2022 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
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.