US-45 over E Br Baltimore River
Ontonagon County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US-45 over E Br Baltimore River in Ontonagon County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 2015, making it 10 years old at the 2025 inventory.
- It carries about 1,450 vehicles a day (traffic count year 2015).
- Its listed owner is the state highway agency.
- It is one of 25 of the 66 inventoried bridges in Ontonagon County rated good (37.9%); 10 (15.2%) are rated poor.
- 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 → (46.47187, -89.1787)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 21 ft |
| Location | 4.5 Mi S Bruce Crossing |
| NBI structure number | 000000000008495 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Ontonagon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| M-64 & M-38 over Ontonagon R River Rd RR | 2005 | 3,625 | Fair |
| M-28 over So Br Ontonagon River | 1990 | 2,398 | Good |
| M-28 over M Br Ontonagon River | 1929 | 2,303 | Fair |
| M-28|m-64 over Merryweather Creek | 1932 | 2,120 | Fair |
| M-64 over Cranberry River | 1948 | 2,117 | Fair |
| M-64 over Weigels Creek | 1945 | 2,117 | Fair |
All bridges nearby: Ontonagon County, MI bridge conditions · every bridge in Ontonagon County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.