Cth W over Thornapple River
Sawyer County, Wisconsin · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Cth W over Thornapple River in Sawyer County, Wisconsin, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 2003, making it 22 years old at the 2025 inventory.
- It carries about 678 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 45 of the 98 inventoried bridges in Sawyer County rated fair (45.9%); 17 (17.3%) 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: deck 6 to 5, superstructure 6 to 5, substructure 8 to 6.
- Its most recent inspection on record is dated August 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 → (45.78376, -90.88951)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 5 | Fair condition |
| Superstructure | 6 | 5 | Fair condition |
| Substructure | 8 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 62 ft |
| Location | 2.3M W Jct Cth M to N |
| NBI structure number | B57006500000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 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 Sawyer County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Sth 27 over Namekagon River | 1996 | 13,500 | Poor |
| Sth 77 over Namekagon River | 2000 | 6,200 | Fair |
| Ush 63 over Namekagon River | 1976 | 3,900 | Good |
| Cth B over Round Lake Narrows | 1986 | 2,296 | Fair |
| Cth B over Chief River | 1988 | 1,803 | Good |
| Sth 27 over Nail Creek | 1990 | 1,600 | Good |
All bridges nearby: Sawyer County, WI bridge conditions · every bridge in Sawyer County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.