Sth 77 over Little Frog Creek
Washburn County, Wisconsin · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sth 77 over Little Frog Creek in Washburn 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 1973, making it 52 years old at the 2025 inventory.
- It carries about 1,900 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 23 of the 49 inventoried bridges in Washburn County rated fair (46.9%); 1 (2.0%) 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 → (46.09971, -91.78272)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Steel culvert |
| Length | about 22 ft |
| Location | 2.1M E Jct Ush 53 |
| NBI structure number | B65001500000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wisconsin department of transportation.
Busiest bridges in Washburn County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ush 63 over Yellow River | 1975 | 9,000 | Fair |
| Ush 53 SB over Potato Creek | 2021 | 8,500 | Good |
| Ush 53 NB over Potato Creek | 2022 | 8,500 | Good |
| Sth 70 over Ush 53 | 1986 | 5,680 | Good |
| Sth 70 over Yellow River | 2023 | 5,600 | Good |
| Ush 63 over Namekagon River | 1966 | 4,600 | Fair |
All bridges nearby: Washburn County, WI bridge conditions · every bridge in Washburn County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.