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Bridge conditions in Lenawee County, Michigan

225 inventoried bridges · 26 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

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 August 20, 2026.
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.

Every bridge in Lenawee County → - all 225, busiest first, each with its own condition record.

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.