Sth 27 over Thornapple River
Rusk County, Wisconsin · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sth 27 over Thornapple River in Rusk 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 2016, making it 9 years old at the 2025 inventory.
- It carries about 2,700 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 50 of the 150 inventoried bridges in Rusk County rated good (33.3%); 14 (9.3%) 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 June 2024, 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 → (45.5313, -91.11159)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 125 ft |
| Location | 1.6M N Jct Cth A |
| NBI structure number | B54012000000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| Inspection interval (item 91) | 48 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 Rusk County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ush 8-3rd St over Flambeau River | 1993 | 6,100 | Fair |
| Sth 27 over Flambeau River | 1988 | 5,500 | Good |
| Ush 8 over Soft Maple Creek | 2018 | 4,100 | Good |
| Ush 8-arthur St over Chippewa River 22 | 1996 | 3,800 | Fair |
| Ush 8 over Little Soft Maple Creek | 1938 | 3,400 | Poor |
| Cth G over Flambeau River | 1979 | 3,105 | Fair |
All bridges nearby: Rusk County, WI bridge conditions · every bridge in Rusk County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.