Bridge conditions in Antrim County, Michigan
15 inventoried bridges · 2 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Antrim County has 2 bridges rated poor out of 15 inventoried, a 13.3% share that puts it well above the national rate of about 7%.
- 2 of the 15 bridges in Antrim County, Michigan, are rated in poor condition (13.3%) in the 2025 National Bridge Inventory, as of .
- 7 bridges (46.7%) are rated good and 6 (40.0%) fair.
- The median Antrim County bridge was built in 1979.
- The busiest poor-rated bridge is Cayuga Street over Intermediate River (built 1977), carrying about 3,000 vehicles a day.
Good 46.7% · Fair 40.0% · Poor 13.3% of 15 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 |
|---|---|---|---|
| Cayuga Street over Intermediate River | 1977 | 3,000 | Poor |
| Dexter Street over Elk River | 1979 | 704 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-31 over Elk River | 1953 | 11,959 | Fair |
| M-88|n Bridge St over Intermediate River | 1931 | 5,984 | Fair |
| Derenzy Road over Cedar River | 1988 | 3,150 | Good |
| Cayuga Street over Intermediate River | 1977 | 3,000 | Poor |
| Route 593 over Torch River | 1971 | 2,040 | Fair |
| Route 593 over Clam Lake | 1958 | 1,400 | Fair |
| State Street over Intermediate River | 1976 | 900 | Fair |
| Dexter Street over Elk River | 1979 | 704 | Poor |
| E Old State Street over Jordan River | 2017 | 525 | Good |
| Mohrmann Bridge Rd over Hanley Creek | 1976 | 150 | 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.