Bridge conditions in Lenawee County, Michigan
225 inventoried bridges · 26 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Lenawee County has 26 bridges rated poor out of 225 inventoried, a 11.6% share that puts it well above the national rate of about 7%.
- 26 of the 225 bridges in Lenawee County, Michigan, are rated in poor condition (11.6%) in the 2025 National Bridge Inventory, as of .
- 94 bridges (41.8%) are rated good and 105 (46.7%) fair.
- The median Lenawee County bridge was built in 1985.
- The busiest poor-rated bridge is US-223 over Norfolk Southern RR (built 1941), carrying about 16,443 vehicles a day.
Good 41.8% · Fair 46.7% · Poor 11.6% of 225 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 |
|---|---|---|---|
| US-223 over Norfolk Southern RR | 1941 | 16,443 | Poor |
| M-34 over S Br Raisin River | 1932 | 11,522 | Poor |
| US-12 over River Raisin | 1977 | 10,834 | Poor |
| Wolf Creek Hwy over Wolf Creek | 1981 | 10,021 | Poor |
| N Union Street over Evans Creek | 1934 | 2,657 | Poor |
| Beecher Rd over Silver Creek | 1992 | 1,845 | Poor |
| M-156 over Bear Creek | 1925 | 1,791 | Poor |
| Carson Hwy over Beaver Creek | 1962 | 1,775 | Poor |
| Morenci Road over Ranger Creek | 1950 | 1,698 | Poor |
| Gorman Rd over Stoney Creek | 1978 | 906 | Poor |
| Treat Hwy over Black Creek | 1970 | 755 | Poor |
| Sand Creek Hwy over Black Creek | 1963 | 544 | Poor |
| Gorman Rd over Big Meadow Drain | 1978 | 512 | Poor |
| Lyons Hwy over Nile Drain | 1977 | 507 | Poor |
| Horton Rd over Han Drain | 1988 | 352 | Poor |
| Seneca Hwy over Raisin River S Branch | 1978 | 340 | Poor |
| Medina Rd over Bean Creek | 1950 | 318 | Poor |
| Townline Hwy over Wolf Creek | 1976 | 181 | Poor |
| Ranger Hwy over Lime Crk | 1982 | 162 | Poor |
| Mulberry Road over Bean Creek | 1952 | 130 | Poor |
| Dillon Hwy over Bean Creek | 1980 | 93 | Poor |
| Packard Rd over Black Creek | 1996 | 72 | Poor |
| Hoagland Hwy over Middle Br of Macon River | 1983 | 69 | Poor |
| Centennial Rd over Schroeder Brook Drain | 1980 | 57 | Poor |
| Mulberry Road over Nile Creek | 1974 | 34 | Poor |
| Cook Road over Big Meadow Drain | 1977 | 20 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| M-52 over Beaver Creek | 1919 | 18,099 | Fair |
| M-52 over S Br Raisin River | 1948 | 17,411 | Fair |
| US-223 over Norfolk Southern RR | 1941 | 16,443 | Poor |
| US-223 over Raisin River | 1940 | 13,979 | Fair |
| Bentoak Ave over S Branch Raisin River | 1952 | 13,600 | Fair |
| US-223 over Mdot RR Cor & M-34 | 2006 | 13,595 | Fair |
| US-223 over S Br Raisin River | 1953 | 13,253 | Fair |
| M-34 over S Br Raisin River | 1932 | 11,522 | Poor |
| US-12 over River Raisin | 1977 | 10,834 | Poor |
| M-50 over River Raisin | 1953 | 10,655 | 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.