Lenawee County Bridge Report Card

Lenawee County scores 55 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F55 / 100

Local infrastructure snapshot

Lenawee County, Michigan

Lenawee County has 225 bridges in the National Bridge Inventory, with 26 rated poor and 13 rated scour-critical. Its poor-condition share of 11.6% is above the 11.0% statewide average. Poor-condition bridges carry about 63,638 daily vehicle crossings.

225Total Bridges

26Poor (11.6%)

105Fair (46.7%)

13Scour-Critical

Quote-Ready Local Facts

11.6%of county bridges are in poor condition, compared with 11.0% statewide and 6.7% nationally.

63,638daily vehicle crossings are on poor-condition bridges in the county.

13bridges are rated scour-critical, or 5.8% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Lenawee County a Bridge Condition Exposure Score of 55/100 (F). The county has 225 bridges in the National Bridge Inventory, including 26 in poor condition and 13 rated scour-critical. Poor-condition bridges carry about 63,638 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.

Download all county report-card scores as CSV.

How the Score Breaks Down

Factor	Weight	County Value	Penalty
Poor-condition bridge share	40	11.6%	23.1
Poor-condition traffic exposure	25	14.1% of measured traffic	10.5
Scour-critical bridge share	20	5.8%	11.6
Average age vs national baseline	10	44 years vs 48 nationally	0.0
Traffic-data completeness	5	452,928 measured daily crossings	0.0

Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.

County Comparisons

County Poor-Condition Share	11.6%
State Poor-Condition Share	11.0%
National Poor-Condition Share	6.7%
County Scour-Critical Share	5.8%
Average Bridge Age	44 years
Poor-Condition Traffic Exposure	63,638 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUs-223 over Norfolk Southern Rr — 16,443 vehicles/day Oldest Listed BridgeW Maumee Street over S Br Raisin River — built in 1919 All County BridgesBrowse every bridge record in Lenawee County.

Top Bridges to Watch in Lenawee County

Bridge	Reason	Condition	Daily Traffic	Year Built
M-34 over S Br Raisin River	Poor condition + traffic exposure	Poor	11,522	1932
N Union Street over Evans Creek	Poor condition + traffic exposure	Poor	2,657	1934
Us-223 over Norfolk Southern Rr	Poor condition + traffic exposure	Poor	16,443	1941
Us-12 over River Raisin	Poor condition + traffic exposure	Poor	10,834	1977
Wolf Creek HWY over Wolf Creek	Poor condition + traffic exposure	Poor	10,021	1981
Beecher RD over Silver Creek	Poor condition + traffic exposure	Poor	1,845	1992
M-156 over Bear Creek	Poor condition + traffic exposure	Poor	1,791	1925
Carson HWY over Beaver Creek	Poor condition + traffic exposure	Poor	1,775	1962
Morenci Road over Ranger Creek	Poor condition + traffic exposure	Poor	1,698	1950
Gorman RD over Stoney Creek	Poor condition + traffic exposure	Poor	906	1978

Important safety note

Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.