Bridge conditions in Tuscola County, Michigan
241 inventoried bridges · 10 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 241 bridges in Tuscola County: 82 rated good, 149 fair, and 10 poor.
- 10 of the 241 bridges in Tuscola County, Michigan, are rated in poor condition (4.1%) in the 2025 National Bridge Inventory, as of .
- 82 bridges (34.0%) are rated good and 149 (61.8%) fair.
- The median Tuscola County bridge was built in 1979.
- The busiest poor-rated bridge is M-46 over Cheboygan & Branches Drn (built 1939), carrying about 6,701 vehicles a day.
Good 34.0% · Fair 61.8% · Poor 4.1% of 241 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-46 over Cheboygan & Branches Drn | 1939 | 6,701 | Poor |
| M-46 over Houghton Creek | 1939 | 5,255 | Poor |
| M-15 over Cheboyganing Creek | 1929 | 2,842 | Poor |
| M-46 over White Creek #2 | 1966 | 2,547 | Poor |
| Gilford Road over Br 1 Northwest Drain | 1972 | 1,700 | Poor |
| Oak Road over Gooding Creek | 1965 | 510 | Poor |
| Shabbona Road over Mud Creek Drain Outlet | 1974 | 140 | Poor |
| Loomis Road over Wiscoggin Drain | 1930 | 135 | Poor |
| Dodge Road over South Br White Creek | 1971 | 120 | Poor |
| Cass City Road over Southgate Drain | 1945 | 77 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| M-15 over Cass River | 2015 | 14,550 | Good |
| M-46 over Cheboygan & Branches Drn | 1939 | 6,701 | Poor |
| M-81 over Marsh Drain | 2007 | 6,273 | Good |
| M-25 over Quanicassee River | 2013 | 5,571 | Good |
| M-25 over (no Name) Drain | 1932 | 5,571 | Fair |
| M-25 over Wisner Drain | 1985 | 5,571 | Fair |
| M-25 over Allen Drain | 1985 | 5,571 | Fair |
| M-25 over Akron Drain | 1985 | 5,571 | Fair |
| M-24 over Cass River | 1941 | 5,516 | Fair |
| M-46 over Cass River | 1934 | 5,255 | Fair |
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.