Bridge conditions in Alcona County, Michigan
27 inventoried bridges · 5 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 27 Alcona County bridges in the federal inventory, 5 carry a poor rating. That 18.5% share is roughly 3x the national average.
- 5 of the 27 bridges in Alcona County, Michigan, are rated in poor condition (18.5%) in the 2025 National Bridge Inventory, as of .
- 13 bridges (48.1%) are rated good and 9 (33.3%) fair.
- The median Alcona County bridge was built in 1991.
- The busiest poor-rated bridge is Hurbert Road over Thunder Bay River (built 1955), carrying about 1,730 vehicles a day.
Good 48.1% · Fair 33.3% · Poor 18.5% of 27 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 |
|---|---|---|---|
| Hurbert Road over Thunder Bay River | 1955 | 1,730 | Poor |
| Hubbard Lake Road over Sucker Creek | 1936 | 830 | Poor |
| Cruzen Road over So Branch of Pine River | 1984 | 339 | Poor |
| Lakeshore Drive over Black River | 1984 | 280 | Poor |
| Mcconnel Road over East Branch Pine River | 1935 | 159 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-23 over Black River | 1935 | 4,714 | Fair |
| County Hwy F41 over Van Etten Creek | 1956 | 2,770 | Fair |
| County Hwy F41 over Van Etten Creek | 1956 | 2,770 | Fair |
| County Hwy F41 over Pine River | 1956 | 2,250 | Fair |
| Hurbert Road over Thunder Bay River | 1955 | 1,730 | Poor |
| Mikado Glennie Rd over Pine River | 1995 | 1,450 | Fair |
| Bamfield Road FH08 over Au Sable River | 1978 | 1,366 | Fair |
| Mikado Road over Van Etten Creek | 2006 | 1,325 | Good |
| Hubbard Lake Road over Sucker Creek | 1936 | 830 | Poor |
| Hubbard Lake Trail over Little Wolf Creek | 2002 | 350 | Good |
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.