Bridge conditions in Cheboygan County, Michigan
73 inventoried bridges · 10 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 7 bridges in Cheboygan County is rated in poor condition: 10 of 73 on the federal inventory, one of the higher shares in Michigan.
- 10 of the 73 bridges in Cheboygan County, Michigan, are rated in poor condition (13.7%) in the 2025 National Bridge Inventory, as of .
- 18 bridges (24.7%) are rated good and 45 (61.6%) fair.
- The median Cheboygan County bridge was built in 1962.
- The busiest poor-rated bridge is Orchard Beach Road over Black River (built 1976), carrying about 2,200 vehicles a day.
Good 24.7% · Fair 61.6% · Poor 13.7% of 73 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 |
|---|---|---|---|
| Orchard Beach Road over Black River | 1976 | 2,200 | Poor |
| Black River Road over Upper Black River | 1935 | 1,500 | Poor |
| Old 27 over Sturgeon River | 1991 | 1,260 | Poor |
| Topinabee Mail Rte over I-75 NB | 1960 | 550 | Poor |
| Trowbridge Road over W Br Sturgeon River | 1949 | 520 | Poor |
| Afton Road over Pigeon River | 1982 | 500 | Poor |
| Barclay Ave over Black River | 1991 | 420 | Poor |
| Paradise Lake Road over Mud Creek | 1963 | 100 | Poor |
| Freeway Trail over Sturgeon River | 1978 | 30 | Poor |
| New Nature Ave over Sturgeon River | 1900 | 25 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Lincoln Avenue over Cheboygan River | 2007 | 12,000 | Fair |
| M-68|s Straits Hwy over Sturgeon River | 1927 | 10,873 | Fair |
| I-75 SB over Trowbridge Rd | 1962 | 7,875 | Fair |
| I-75 NB over Trowbridge Rd | 1962 | 7,875 | Fair |
| I-75 SB over M-27|s Straits Hwy | 1962 | 7,777 | Fair |
| I-75 NB over M-27|s Straits Hwy | 1962 | 7,777 | Fair |
| I-75 SB over Sturgeon River | 1962 | 7,777 | Fair |
| I-75 NB over Sturgeon River | 1962 | 7,777 | Fair |
| US-23 over Cheboygan River | 1940 | 7,273 | Fair |
| Straits Hwy(old 27 over Indian River | 2012 | 7,047 | 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.