Pentoga Road over Brule River
Iron County, Michigan · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Pentoga Road over Brule River in Iron County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1924 and reconstructed in 1988, making it 101 years old at the 2025 inventory.
- It carries about 3 vehicles a day (traffic count year 1994).
- Its listed owner is the county highway agency.
- It is one of 26 of the 54 inventoried bridges in Iron County rated fair (48.1%); 12 (22.2%) 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 → (46.00185, -88.50057)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 5 | Fair condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Steel through truss |
| Length | about 63 ft |
| Location | 2.5 Mi S of RD424 Pentoga |
| NBI structure number | 000000000004197 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Iron County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| W Genesee(old US2) over Iron River Buried | 1918 | 8,200 | Poor |
| US-2|ADAMS St over Iron River | 1997 | 7,655 | Fair |
| US-2 over Chicagoan Creek | 1929 | 3,653 | Poor |
| US-2 over Fortune Lake Outlet | 1942 | 3,653 | Fair |
| M-69 over Paint River | 1924 | 3,080 | Fair |
| US-141 over Paint River | 1970 | 3,039 | Fair |
All bridges nearby: Iron County, MI bridge conditions · every bridge in Iron County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.