Bridge conditions in Alger County, Michigan
53 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 53 Alger County bridges in the federal inventory, 7 carry a poor rating. That 13.2% share is roughly 2x the national average.
- 7 of the 53 bridges in Alger County, Michigan, are rated in poor condition (13.2%) in the 2025 National Bridge Inventory, as of .
- 16 bridges (30.2%) are rated good and 30 (56.6%) fair.
- The median Alger County bridge was built in 1947.
- The busiest poor-rated bridge is M-28 over Prairie Creek (built 1947), carrying about 1,973 vehicles a day.
Good 30.2% · Fair 56.6% · Poor 13.2% of 53 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| M-28 over Prairie Creek | 1947 | 1,973 | Poor |
| US-41 over W Br Whitefish River | 1936 | 1,640 | Poor |
| King Road over Whitefish River | 1910 | 50 | Poor |
| Alec Johnson Road over Whitefish River | 1910 | 5 | Poor |
| Kivamaki Road over Whitefish River | 1910 | 5 | Poor |
| Paulson Road over Dexter Creek | 1920 | 5 | Poor |
| Woodland Road over Au Train River | 1910 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| M-28 over Anna River | 1949 | 7,171 | Fair |
| East Munising Ave over Anna River | 1978 | 5,715 | Fair |
| M-28 over Au Train River | 1932 | 5,200 | Fair |
| US-41 over Huber Creek | 1987 | 3,609 | Fair |
| M-28 over Sand River | 1939 | 3,093 | Fair |
| M-28 over Laughing Whitefish River | 1939 | 3,093 | Good |
| M-28 over Rock River | 1932 | 3,093 | Fair |
| US-41 over W Br Whitefish River | 1936 | 2,264 | Fair |
| M-28 over Hickey Creek | 1947 | 1,973 | Fair |
| M-28 over Prairie Creek | 1947 | 1,973 | Poor |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Michigan: Michigan bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.