Irr Bia Rte 10 over Flambeau Bear River
Iron County, Wisconsin · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Bia Rte 10 over Flambeau Bear River in Iron County, Wisconsin, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 3 (serious condition) on the 0-9 scale.
- It was built in 1932 and reconstructed in 1958, making it 93 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2024).
- It is one of 2 of the 48 inventoried bridges in Iron County rated poor (4.2%); 2 (4.2%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated September 2024, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (45.98206, -89.93702)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 3 | 3 | Serious condition |
Bridge details
| Structure | Timber slab |
| Length | about 37 ft |
| Location | 6KM NW of Lac Du Flambeau |
| NBI structure number | 00000000000F303 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | September 2024 |
| Inspection interval (item 91) | 24 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 Iron County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Lrd Poplar St over Montreal River | 2010 | 5,593 | Fair |
| Sth 77-silver St over Montreal River | 1965 | 4,900 | Fair |
| Ush 2 over Soo Line/vaughn Creek | 1976 | 4,300 | Good |
| Ush 2 over W Br Montreal River | 1974 | 3,500 | Good |
| Ush 2 WB over Montreal River | 1961 | 3,000 | Fair |
| Ush 2 EB over Montreal River | 1961 | 3,000 | Fair |
All bridges nearby: Iron County, WI bridge conditions · every bridge in Iron County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.